Write to temp file before saving data (#238)

* Create temp file before saving data

On the event of full disk, we may encounter the case where the
destination file get replaced by an empty file as the
ioutil.WriteFile truncates the destination before write.

* Close the tempFile instance before moving it

* Blacklist Wireguard interfaces for ICE checks

.github/workflows/golang-test-build.yml

@@ -1,25 +1,6 @@
-on:
+name: Test Build On Platforms
-  push:
+on: [pull_request]
-    branches:
-      - main
-  pull_request:
-name: Test
 jobs:
-  test:
-    strategy:
-      matrix:
-        go-version: [1.17.x]
-    runs-on: ubuntu-latest
-    steps:
-      - name: Install Go
-        uses: actions/setup-go@v2
-        with:
-          go-version: ${{ matrix.go-version }}
-      - name: Checkout code
-        uses: actions/checkout@v2
-      - name: Test
-        run: GOBIN=$(which go) && sudo --preserve-env=GOROOT $GOBIN test -p 1 ./...
-
   test_build:
     strategy:
       matrix:
@@ -36,15 +17,15 @@ jobs:
           go-version: ${{ matrix.go-version }}
 
       - name: Cache Go modules
-        uses: actions/cache@v1
+        uses: actions/cache@v2
         with:
           path: ~/go/pkg/mod
-          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          key: ${{ runner.os }}-go-test-${{ matrix.os }}-${{ hashFiles('**/go.sum') }}
           restore-keys: |
-            ${{ runner.os }}-go-
+            ${{ runner.os }}-go-test-${{ matrix.os }}
 
       - name: Install modules
-        run: go mod tidy
+        run: GOOS=${{ matrix.os }} go mod tidy
 
       - name: run build client
         run: GOOS=${{ matrix.os }} go build .

.github/workflows/golang-test-darwin.yml

@@ -0,0 +1,29 @@
+name: Test Code Darwin
+on: [push,pull_request]
+jobs:
+  test:
+    strategy:
+      matrix:
+        go-version: [1.17.x]
+    runs-on: macos-latest
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Cache Go modules
+        uses: actions/cache@v2
+        with:
+          path: ~/go/pkg/mod
+          key: macos-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            macos-go-
+
+      - name: Install modules
+        run: go mod tidy
+
+      - name: Test
+        run: GOBIN=$(which go) && sudo --preserve-env=GOROOT $GOBIN test ./...

.github/workflows/golang-test-linux.yml

@@ -0,0 +1,42 @@
+name: Test Code Linux
+on: [push,pull_request]
+jobs:
+  test:
+    strategy:
+      matrix:
+        go-version: [1.17.x]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: update limits.d
+        run: |
+          cat <<'EOF' | sudo tee -a /etc/security/limits.d/wt.conf
+          root soft     nproc          65535
+          root hard     nproc          65535
+          root soft     nofile         65535
+          root hard     nofile         65535
+          $(whoami) soft     nproc          65535
+          $(whoami) hard     nproc          65535
+          $(whoami) soft     nofile         65535
+          $(whoami) hard     nofile         65535
+          EOF
+
+      - name: Cache Go modules
+        uses: actions/cache@v2
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install modules
+        run: go mod tidy
+
+      - name: Test
+        run: GOBIN=$(which go) && sudo --preserve-env=GOROOT $GOBIN test ./...

.github/workflows/golang-test-windows.yml

@@ -0,0 +1,51 @@
+name: Test Code Windows
+on: [push,pull_request]
+jobs:
+  pre:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - run: bash -x wireguard_nt.sh
+        working-directory: client
+
+      - uses: actions/upload-artifact@v2
+        with:
+          name: syso
+          path: client/*.syso
+          retention-days: 1
+
+  test:
+    needs: pre
+    strategy:
+      matrix:
+        go-version: [1.17.x]
+    runs-on: windows-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+
+      - uses: actions/cache@v2
+        with:
+          path: |
+            %LocalAppData%\go-build
+            ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: |
+            ${{ runner.os }}-go-
+
+      - uses: actions/download-artifact@v2
+        with:
+          name: syso
+          path: iface\
+
+      - name: Install modules
+        run: go mod tidy
+
+      - name: Test
+        run: go test -tags=load_wgnt_from_rsrc ./...

.github/workflows/golangci-lint.yml

@@ -1,9 +1,5 @@
 name: golangci-lint
-on:
+on: [pull_request]
-  push:
-    branches:
-      - main
-  pull_request:
 jobs:
   golangci:
     name: lint

.github/workflows/release.yml

@@ -14,6 +14,10 @@ jobs:
         uses: actions/checkout@v2
         with:
           fetch-depth: 0 # It is required for GoReleaser to work properly
+
+      - name: Generate syso with DLL
+        run: bash -x wireguard_nt.sh
+        working-directory: client
       -
         name: Set up Go
         uses: actions/setup-go@v2

.gitignore

@@ -6,3 +6,5 @@ conf.json
 http-cmds.sh
 infrastructure_files/management.json
 infrastructure_files/docker-compose.yml
+*.syso
+client/.distfiles/

.goreleaser.yaml

@@ -23,10 +23,10 @@ builds:
       - goos: windows
         goarch: arm
     ldflags:
-      - -s -w -X main.version={{.Version}} -X main.commit={{.Commit}} -X main.date={{.CommitDate}} -X main.builtBy=goreleaser
+      - -s -w -X github.com/wiretrustee/wiretrustee/client/system.version={{.Version}} -X main.commit={{.Commit}} -X main.date={{.CommitDate}} -X main.builtBy=goreleaser
     mod_timestamp: '{{ .CommitTimestamp }}'
     tags:
-      - load_wintun_from_rsrc
+      - load_wgnt_from_rsrc
 
   - id: wiretrustee-mgmt
     dir: management

AUTHORS

@@ -1,2 +1,3 @@
 Mikhail Bragin (https://github.com/braginini)
 Maycon Santos (https://github.com/mlsmaycon)
+Wiretrustee UG (haftungsbeschränkt)

CODE_OF_CONDUCT.md

@@ -0,0 +1,132 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, caste, color, religion, or sexual
+identity and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the overall
+  community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or advances of
+  any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email address,
+  without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+dev@wiretrustee.com.
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series of
+actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or permanent
+ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior, harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within the
+community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.1, available at
+[https://www.contributor-covenant.org/version/2/1/code_of_conduct.html][v2.1].
+
+Community Impact Guidelines were inspired by
+[Mozilla's code of conduct enforcement ladder][Mozilla CoC].
+
+For answers to common questions about this code of conduct, see the FAQ at
+[https://www.contributor-covenant.org/faq][FAQ]. Translations are available at
+[https://www.contributor-covenant.org/translations][translations].
+
+[homepage]: https://www.contributor-covenant.org
+[v2.1]: https://www.contributor-covenant.org/version/2/1/code_of_conduct.html
+[Mozilla CoC]: https://github.com/mozilla/diversity
+[FAQ]: https://www.contributor-covenant.org/faq
+[translations]: https://www.contributor-covenant.org/translations

LICENSE

@@ -1,6 +1,6 @@
 BSD 3-Clause License
 
-Copyright (c) 2021 Wiretrustee AUTHORS
+Copyright (c) 2022 Wiretrustee UG (haftungsbeschränkt) & AUTHORS
 
 Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 

README.md

@@ -31,7 +31,7 @@ It requires zero configuration effort leaving behind the hassle of opening ports
 
 **Wiretrustee automates Wireguard-based networks, offering a management layer with:**
 * Centralized Peer IP management with a UI dashboard.
-* Encrypted peer-to-peet connections without a centralized VPN gateway.
+* Encrypted peer-to-peer connections without a centralized VPN gateway.
 * Automatic Peer discovery and configuration.
 * UDP hole punching to establish peer-to-peer connections behind NAT, firewall, and without a public static IP.
 * Connection relay fallback in case a peer-to-peer connection is not possible.
@@ -39,7 +39,7 @@ It requires zero configuration effort leaving behind the hassle of opening ports
 * Client application SSO with MFA (coming soon).
 * Access Controls (coming soon).
 * Activity Monitoring (coming soon).
-* Private DNS (coming baoon)
+* Private DNS (coming soon)
 
 ### Secure peer-to-peer VPN in minutes
 <p float="left" align="middle">
@@ -49,7 +49,7 @@ It requires zero configuration effort leaving behind the hassle of opening ports
 
 **Note**: The `main` branch may be in an *unstable or even broken state* during development. For stable versions, see [releases](https://github.com/wiretrustee/wiretrustee/releases).
 
-Hosted demo version: 
+Hosted version: 
 [https://app.wiretrustee.com/](https://app.wiretrustee.com/peers). 
 
 [UI Dashboard Repo](https://github.com/wiretrustee/wiretrustee-dashboard)
@@ -159,7 +159,7 @@ Alternatively, if you are hosting your own Management Service provide `--managem
   sudo wiretrustee up --setup-key <SETUP KEY> --management-url https://localhost:33073
   ```
 
-> You could also omit `--setup-key` property. In this case the tool will prompt it the key.
+> You could also omit the `--setup-key` property. In this case, the tool will prompt for the key.
 
 
 2. Check your IP:
@@ -181,8 +181,8 @@ For **Windows** systems:
 ### Running Dashboard, Management, Signal and Coturn
 Wiretrustee uses [Auth0](https://auth0.com) for user authentication and authorization, therefore you will need to create a free account 
 and configure Auth0 variables in the compose file (dashboard) and in the management config file.
-We chose Auth0 to "outsource" the user management part of our platform because we believe that implementing a proper user auth is not a trivial task and requires significant amount of time to make it right. We focused on connectivity instead.
+We chose Auth0 to "outsource" the user management part of our platform because we believe that implementing a proper user auth is not a trivial task and requires a significant amount of time to make it right. We focused on connectivity instead.
-It is worth mentioning that dependency to Auth0 is the only one that cannot be self-hosted.
+It is worth mentioning that the dependency on Auth0 is the only one that cannot be self-hosted.
 
 Configuring Wiretrustee Auth0 integration:
 - check [How to run](https://github.com/wiretrustee/wiretrustee-dashboard#how-to-run) to obtain Auth0 environment variables for UI Dashboard
@@ -194,13 +194,13 @@ Configuring Wiretrustee Auth0 integration:
 Under infrastructure_files we have a docker-compose example to run Dashboard, Wiretrustee Management and Signal services, plus an instance of [Coturn](https://github.com/coturn/coturn), it also provides a turnserver.conf file as a simple example of Coturn configuration. 
 You can edit the turnserver.conf file and change its Realm setting (defaults to wiretrustee.com) to your own domain and user setting (defaults to username1:password1) to **proper credentials**.
 
-The example is set to use the official images from Wiretrustee and Coturn, you can find our documentation to run the signal server in docker in [Running the Signal service](#running-the-signal-service), the management in [Management](./management/README.md), and the Coturn official documentation [here](https://hub.docker.com/r/coturn/coturn).
+The example is set to use the official images from Wiretrustee and Coturn; you can find our documentation to run the signal server in docker in [Running the Signal service](#running-the-signal-service), the management in [Management](./management/README.md), and the Coturn official documentation [here](https://hub.docker.com/r/coturn/coturn).
 
 > Run Coturn at your own risk, we are just providing an example, be sure to follow security best practices and to configure proper credentials as this service can be exploited and you may face large data transfer charges.
 
-Also, if you have an SSL certificate for Coturn, you can modify the docker-compose.yml file to point to its files in your host machine, then switch the domainname to your own SSL domain. If you don't already have an SSL certificate, you can follow [Certbot's](https://certbot.eff.org/docs/intro.html) official documentation
+Also, if you have an SSL certificate for Coturn, you can modify the docker-compose.yml file to point to its files in your host machine and then switch the domain name to your own SSL domain. If you don't already have an SSL certificate, you can follow [Certbot's](https://certbot.eff.org/docs/intro.html) official documentation
 to generate one from [Let’s Encrypt](https://letsencrypt.org/), or, we found that the example provided by [BigBlueButton](https://docs.bigbluebutton.org/2.2/setup-turn-server.html#generating-tls-certificates) covers the basics to configure Coturn with Let's Encrypt certs. 
-> The Wiretrustee Management service can generate and maintain the certificates automatically, all you need to do is run the servicein a host  with a public IP, configure a valid DNS record pointing to that IP and uncomment the 443 ports and command lines in the docker-compose.yml file.
+> The Wiretrustee Management service can generate and maintain the certificates automatically, all you need to do is run the service in a host with a public IP, configure a valid DNS record pointing to that IP and uncomment the 443 ports and command lines in the docker-compose.yml file.
 
 Simple docker-composer execution:
 ````shell

client/cmd/login.go

@@ -4,17 +4,21 @@ import (
 	"bufio"
 	"context"
 	"fmt"
+	"os"
+	"time"
+
+	"github.com/cenkalti/backoff/v4"
 	"github.com/google/uuid"
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"github.com/wiretrustee/wiretrustee/client/internal"
+	"github.com/wiretrustee/wiretrustee/client/system"
 	mgm "github.com/wiretrustee/wiretrustee/management/client"
 	mgmProto "github.com/wiretrustee/wiretrustee/management/proto"
 	"github.com/wiretrustee/wiretrustee/util"
 	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
-	"os"
 )
 
 var (
@@ -24,55 +28,78 @@ var (
 		RunE: func(cmd *cobra.Command, args []string) error {
 			SetFlagsFromEnvVars()
 
-			err := util.InitLog(logLevel, logFile)
+			var backOff = &backoff.ExponentialBackOff{
-			if err != nil {
+				InitialInterval:     time.Second,
-				log.Errorf("failed initializing log %v", err)
+				RandomizationFactor: backoff.DefaultRandomizationFactor,
-				return err
+				Multiplier:          backoff.DefaultMultiplier,
+				MaxInterval:         2 * time.Second,
+				MaxElapsedTime:      time.Second * 10,
+				Stop:                backoff.Stop,
+				Clock:               backoff.SystemClock,
 			}
 
-			config, err := internal.GetConfig(managementURL, configPath, preSharedKey)
+			loginOp := func() error {
-			if err != nil {
+
-				log.Errorf("failed getting config %s %v", configPath, err)
+				err := util.InitLog(logLevel, logFile)
-				return err
+				if err != nil {
+					log.Errorf("failed initializing log %v", err)
+					return err
+				}
+
+				config, err := internal.GetConfig(managementURL, configPath, preSharedKey)
+				if err != nil {
+					log.Errorf("failed getting config %s %v", configPath, err)
+					return err
+				}
+
+				//validate our peer's Wireguard PRIVATE key
+				myPrivateKey, err := wgtypes.ParseKey(config.PrivateKey)
+				if err != nil {
+					log.Errorf("failed parsing Wireguard key %s: [%s]", config.PrivateKey, err.Error())
+					return err
+				}
+
+				ctx := context.Background()
+
+				mgmTlsEnabled := false
+				if config.ManagementURL.Scheme == "https" {
+					mgmTlsEnabled = true
+				}
+
+				log.Debugf("connecting to Management Service %s", config.ManagementURL.String())
+				mgmClient, err := mgm.NewClient(ctx, config.ManagementURL.Host, myPrivateKey, mgmTlsEnabled)
+				if err != nil {
+					log.Errorf("failed connecting to Management Service %s %v", config.ManagementURL.String(), err)
+					return err
+				}
+				log.Debugf("connected to management Service %s", config.ManagementURL.String())
+
+				serverKey, err := mgmClient.GetServerPublicKey()
+				if err != nil {
+					log.Errorf("failed while getting Management Service public key: %v", err)
+					return err
+				}
+
+				_, err = loginPeer(*serverKey, mgmClient, setupKey)
+				if err != nil {
+					log.Errorf("failed logging-in peer on Management Service : %v", err)
+					return err
+				}
+
+				err = mgmClient.Close()
+				if err != nil {
+					log.Errorf("failed closing Management Service client: %v", err)
+					return err
+				}
+
+				return nil
 			}
 
-			//validate our peer's Wireguard PRIVATE key
+			err := backoff.RetryNotify(loginOp, backOff, func(err error, duration time.Duration) {
-			myPrivateKey, err := wgtypes.ParseKey(config.PrivateKey)
+				log.Warnf("retrying Login to the Management service in %v due to error %v", duration, err)
+			})
 			if err != nil {
-				log.Errorf("failed parsing Wireguard key %s: [%s]", config.PrivateKey, err.Error())
+				log.Errorf("exiting login retry loop due to unrecoverable error: %v", err)
-				return err
-			}
-
-			ctx := context.Background()
-
-			mgmTlsEnabled := false
-			if config.ManagementURL.Scheme == "https" {
-				mgmTlsEnabled = true
-			}
-
-			log.Debugf("connecting to Management Service %s", config.ManagementURL.String())
-			mgmClient, err := mgm.NewClient(ctx, config.ManagementURL.Host, myPrivateKey, mgmTlsEnabled)
-			if err != nil {
-				log.Errorf("failed connecting to Management Service %s %v", config.ManagementURL.String(), err)
-				return err
-			}
-			log.Debugf("connected to anagement Service %s", config.ManagementURL.String())
-
-			serverKey, err := mgmClient.GetServerPublicKey()
-			if err != nil {
-				log.Errorf("failed while getting Management Service public key: %v", err)
-				return err
-			}
-
-			_, err = loginPeer(*serverKey, mgmClient, setupKey)
-			if err != nil {
-				log.Errorf("failed logging-in peer on Management Service : %v", err)
-				return err
-			}
-
-			err = mgmClient.Close()
-			if err != nil {
-				log.Errorf("failed closing Management Service client: %v", err)
 				return err
 			}
 
@@ -82,7 +109,7 @@ var (
 )
 
 // loginPeer attempts to login to Management Service. If peer wasn't registered, tries the registration flow.
-func loginPeer(serverPublicKey wgtypes.Key, client *mgm.Client, setupKey string) (*mgmProto.LoginResponse, error) {
+func loginPeer(serverPublicKey wgtypes.Key, client *mgm.GrpcClient, setupKey string) (*mgmProto.LoginResponse, error) {
 
 	loginResp, err := client.Login(serverPublicKey)
 	if err != nil {
@@ -101,7 +128,7 @@ func loginPeer(serverPublicKey wgtypes.Key, client *mgm.Client, setupKey string)
 
 // registerPeer checks whether setupKey was provided via cmd line and if not then it prompts user to enter a key.
 // Otherwise tries to register with the provided setupKey via command line.
-func registerPeer(serverPublicKey wgtypes.Key, client *mgm.Client, setupKey string) (*mgmProto.LoginResponse, error) {
+func registerPeer(serverPublicKey wgtypes.Key, client *mgm.GrpcClient, setupKey string) (*mgmProto.LoginResponse, error) {
 
 	var err error
 	if setupKey == "" {
@@ -118,7 +145,8 @@ func registerPeer(serverPublicKey wgtypes.Key, client *mgm.Client, setupKey stri
 	}
 
 	log.Debugf("sending peer registration request to Management Service")
-	loginResp, err := client.Register(serverPublicKey, validSetupKey.String())
+	info := system.GetInfo()
+	loginResp, err := client.Register(serverPublicKey, validSetupKey.String(), info)
 	if err != nil {
 		log.Errorf("failed registering peer %v", err)
 		return nil, err

client/cmd/login_test.go

@@ -60,7 +60,7 @@ func TestLogin(t *testing.T) {
 	}
 
 	if actualConf.WgIface != iface.WgInterfaceDefault {
-		t.Errorf("expected WgIface %s got %s", iface.WgInterfaceDefault, actualConf.WgIface)
+		t.Errorf("expected WgIfaceName %s got %s", iface.WgInterfaceDefault, actualConf.WgIface)
 	}
 
 	if len(actualConf.PrivateKey) == 0 {

client/cmd/testutil.go

@@ -38,7 +38,7 @@ func startManagement(config *mgmt.Config, t *testing.T) (*grpc.Server, net.Liste
 	}
 
 	peersUpdateManager := mgmt.NewPeersUpdateManager()
-	accountManager := mgmt.NewManager(store, peersUpdateManager)
+	accountManager := mgmt.NewManager(store, peersUpdateManager, nil)
 	turnManager := mgmt.NewTimeBasedAuthSecretsManager(peersUpdateManager, config.TURNConfig)
 	mgmtServer, err := mgmt.NewServer(config, accountManager, peersUpdateManager, turnManager)
 	if err != nil {

client/cmd/up.go

@@ -2,6 +2,8 @@ package cmd
 
 import (
 	"context"
+	"time"
+
 	"github.com/cenkalti/backoff/v4"
 	"github.com/kardianos/service"
 	log "github.com/sirupsen/logrus"
@@ -13,7 +15,6 @@ import (
 	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
-	"time"
 )
 
 var (
@@ -22,11 +23,13 @@ var (
 		Short: "install, login and start wiretrustee client",
 		RunE: func(cmd *cobra.Command, args []string) error {
 			SetFlagsFromEnvVars()
+
 			err := loginCmd.RunE(cmd, args)
 			if err != nil {
 				return err
 			}
 			if logFile == "console" {
+				SetupCloseHandler()
 				return runClient()
 			}
 
@@ -64,10 +67,11 @@ func createEngineConfig(key wgtypes.Key, config *internal.Config, peerConfig *mg
 	}
 
 	engineConf := &internal.EngineConfig{
-		WgIface:        config.WgIface,
+		WgIfaceName:    config.WgIface,
 		WgAddr:         peerConfig.Address,
 		IFaceBlackList: iFaceBlackList,
 		WgPrivateKey:   key,
+		WgPort:         internal.WgPort,
 	}
 
 	if config.PreSharedKey != "" {
@@ -82,7 +86,7 @@ func createEngineConfig(key wgtypes.Key, config *internal.Config, peerConfig *mg
 }
 
 // connectToSignal creates Signal Service client and established a connection
-func connectToSignal(ctx context.Context, wtConfig *mgmProto.WiretrusteeConfig, ourPrivateKey wgtypes.Key) (*signal.Client, error) {
+func connectToSignal(ctx context.Context, wtConfig *mgmProto.WiretrusteeConfig, ourPrivateKey wgtypes.Key) (*signal.GrpcClient, error) {
 	var sigTLSEnabled bool
 	if wtConfig.Signal.Protocol == mgmProto.HostConfig_HTTPS {
 		sigTLSEnabled = true
@@ -100,7 +104,7 @@ func connectToSignal(ctx context.Context, wtConfig *mgmProto.WiretrusteeConfig,
 }
 
 // connectToManagement creates Management Services client, establishes a connection, logs-in and gets a global Wiretrustee config (signal, turn, stun hosts, etc)
-func connectToManagement(ctx context.Context, managementAddr string, ourPrivateKey wgtypes.Key, tlsEnabled bool) (*mgm.Client, *mgmProto.LoginResponse, error) {
+func connectToManagement(ctx context.Context, managementAddr string, ourPrivateKey wgtypes.Key, tlsEnabled bool) (*mgm.GrpcClient, *mgmProto.LoginResponse, error) {
 	log.Debugf("connecting to management server %s", managementAddr)
 	client, err := mgm.NewClient(ctx, managementAddr, ourPrivateKey, tlsEnabled)
 	if err != nil {
@@ -183,7 +187,6 @@ func runClient() error {
 			return err
 		}
 
-		// create start the Wiretrustee Engine that will connect to the Signal and Management streams and manage connections to remote peers.
 		engine := internal.NewEngine(signalClient, mgmClient, engineConfig, cancel, ctx)
 		err = engine.Start()
 		if err != nil {

client/cmd/up_test.go

@@ -36,7 +36,7 @@ func TestUp_Start(t *testing.T) {
 
 func TestUp(t *testing.T) {
 
-	defer iface.Close()
+	//defer iface.Close("wt0")
 
 	tempDir := t.TempDir()
 	confPath := tempDir + "/config.json"
@@ -53,6 +53,8 @@ func TestUp(t *testing.T) {
 		"A2C8E62B-38F5-4553-B31E-DD66C696CEBB",
 		"--management-url",
 		mgmtURL.String(),
+		"--log-level",
+		"debug",
 		"--log-file",
 		"console",
 	})
@@ -63,20 +65,23 @@ func TestUp(t *testing.T) {
 		}
 	}()
 
-	exists := false
+	timeout := 15 * time.Second
-	for start := time.Now(); time.Since(start) < 15*time.Second; {
+	timeoutChannel := time.After(timeout)
+	for {
+		select {
+		case <-timeoutChannel:
+			t.Fatalf("expected wireguard interface %s to be created before %s", iface.WgInterfaceDefault, timeout.String())
+		default:
+		}
 		e, err := iface.Exists(iface.WgInterfaceDefault)
 		if err != nil {
 			continue
 		}
+		if err != nil {
+			continue
+		}
 		if *e {
-			exists = true
 			break
 		}
-
-	}
-
-	if !exists {
-		t.Errorf("expected wireguard interface %s to be created", iface.WgInterfaceDefault)
 	}
 }

client/cmd/version.go

@@ -1,14 +1,16 @@
 package cmd
 
-import "github.com/spf13/cobra"
+import (
+	"github.com/spf13/cobra"
+	"github.com/wiretrustee/wiretrustee/client/system"
+)
 
 var (
-	Version    string
 	versionCmd = &cobra.Command{
 		Use:   "version",
 		Short: "prints wiretrustee version",
 		Run: func(cmd *cobra.Command, args []string) {
-			cmd.Println(Version)
+			cmd.Println(system.WiretrusteeVersion())
 		},
 	}
 )

client/internal/cond.go

@@ -1,32 +0,0 @@
-package internal
-
-import "sync"
-
-// A Cond is a condition variable like sync.Cond, but using a channel so we can use select.
-type Cond struct {
-	once sync.Once
-	C    chan struct{}
-}
-
-// NewCond creates a new condition variable.
-func NewCond() *Cond {
-	return &Cond{C: make(chan struct{})}
-}
-
-// Do runs f if the condition hasn't been signaled yet. Afterwards it will be signaled.
-func (c *Cond) Do(f func()) {
-	c.once.Do(func() {
-		f()
-		close(c.C)
-	})
-}
-
-// Signal closes the condition variable channel.
-func (c *Cond) Signal() {
-	c.Do(func() {})
-}
-
-// Wait waits for the condition variable channel to close.
-func (c *Cond) Wait() {
-	<-c.C
-}

client/internal/config.go

@@ -110,7 +110,7 @@ func GetConfig(managementURL string, configPath string, preSharedKey string) (*C
 
 // generateKey generates a new Wireguard private key
 func generateKey() string {
-	key, err := wgtypes.GenerateKey()
+	key, err := wgtypes.GeneratePrivateKey()
 	if err != nil {
 		panic(err)
 	}

client/internal/connection.go

@@ -1,425 +0,0 @@
-package internal
-
-import (
-	"context"
-	"fmt"
-	ice "github.com/pion/ice/v2"
-	log "github.com/sirupsen/logrus"
-	"github.com/wiretrustee/wiretrustee/iface"
-	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
-	"net"
-	"sync"
-	"time"
-)
-
-var (
-	// DefaultWgKeepAlive default Wireguard keep alive constant
-	DefaultWgKeepAlive = 20 * time.Second
-	privateIPBlocks    []*net.IPNet
-)
-
-type Status string
-
-const (
-	StatusConnected    Status = "Connected"
-	StatusConnecting   Status = "Connecting"
-	StatusDisconnected Status = "Disconnected"
-)
-
-func init() {
-	for _, cidr := range []string{
-		"127.0.0.0/8",    // IPv4 loopback
-		"10.0.0.0/8",     // RFC1918
-		"172.16.0.0/12",  // RFC1918
-		"192.168.0.0/16", // RFC1918
-		"169.254.0.0/16", // RFC3927 link-local
-		"::1/128",        // IPv6 loopback
-		"fe80::/10",      // IPv6 link-local
-		"fc00::/7",       // IPv6 unique local addr
-	} {
-		_, block, err := net.ParseCIDR(cidr)
-		if err != nil {
-			panic(fmt.Errorf("parse error on %q: %v", cidr, err))
-		}
-		privateIPBlocks = append(privateIPBlocks, block)
-	}
-}
-
-// ConnConfig Connection configuration struct
-type ConnConfig struct {
-	// Local Wireguard listening address  e.g. 127.0.0.1:51820
-	WgListenAddr string
-	// A Local Wireguard Peer IP address in CIDR notation e.g. 10.30.30.1/24
-	WgPeerIP string
-	// Local Wireguard Interface name (e.g. wg0)
-	WgIface string
-	// Wireguard allowed IPs (e.g. 10.30.30.2/32)
-	WgAllowedIPs string
-	// Local Wireguard private key
-	WgKey wgtypes.Key
-	// Remote Wireguard public key
-	RemoteWgKey wgtypes.Key
-
-	PreSharedKey *wgtypes.Key
-
-	StunTurnURLS []*ice.URL
-
-	iFaceBlackList map[string]struct{}
-}
-
-// IceCredentials ICE protocol credentials struct
-type IceCredentials struct {
-	uFrag string
-	pwd   string
-}
-
-// Connection Holds information about a connection and handles signal protocol
-type Connection struct {
-	Config ConnConfig
-	// signalCandidate is a handler function to signal remote peer about local connection candidate
-	signalCandidate func(candidate ice.Candidate) error
-
-	// signalOffer is a handler function to signal remote peer our connection offer (credentials)
-	signalOffer func(uFrag string, pwd string) error
-
-	// signalOffer is a handler function to signal remote peer our connection answer (credentials)
-	signalAnswer func(uFrag string, pwd string) error
-
-	// remoteAuthChannel is a channel used to wait for remote credentials to proceed with the connection
-	remoteAuthChannel chan IceCredentials
-
-	// agent is an actual ice.Agent that is used to negotiate and maintain a connection to a remote peer
-	agent *ice.Agent
-
-	wgProxy *WgProxy
-
-	connected *Cond
-	closeCond *Cond
-
-	remoteAuthCond sync.Once
-
-	Status Status
-}
-
-// NewConnection Creates a new connection and sets handling functions for signal protocol
-func NewConnection(config ConnConfig,
-	signalCandidate func(candidate ice.Candidate) error,
-	signalOffer func(uFrag string, pwd string) error,
-	signalAnswer func(uFrag string, pwd string) error,
-) *Connection {
-
-	return &Connection{
-		Config:            config,
-		signalCandidate:   signalCandidate,
-		signalOffer:       signalOffer,
-		signalAnswer:      signalAnswer,
-		remoteAuthChannel: make(chan IceCredentials, 1),
-		closeCond:         NewCond(),
-		connected:         NewCond(),
-		agent:             nil,
-		wgProxy:           NewWgProxy(config.WgIface, config.RemoteWgKey.String(), config.WgAllowedIPs, config.WgListenAddr, config.PreSharedKey),
-		Status:            StatusDisconnected,
-	}
-}
-
-// Open opens connection to a remote peer.
-// Will block until the connection has successfully established
-func (conn *Connection) Open(timeout time.Duration) error {
-
-	// create an ice.Agent that will be responsible for negotiating and establishing actual peer-to-peer connection
-	a, err := ice.NewAgent(&ice.AgentConfig{
-		// MulticastDNSMode: ice.MulticastDNSModeQueryAndGather,
-		NetworkTypes:   []ice.NetworkType{ice.NetworkTypeUDP4},
-		Urls:           conn.Config.StunTurnURLS,
-		CandidateTypes: []ice.CandidateType{ice.CandidateTypeHost, ice.CandidateTypeServerReflexive, ice.CandidateTypeRelay},
-		InterfaceFilter: func(s string) bool {
-			if conn.Config.iFaceBlackList == nil {
-				return true
-			}
-			_, ok := conn.Config.iFaceBlackList[s]
-			return !ok
-		},
-	})
-	if err != nil {
-		return err
-	}
-
-	conn.agent = a
-	defer func() {
-		err := conn.agent.Close()
-		if err != nil {
-			return
-		}
-	}()
-
-	err = conn.listenOnLocalCandidates()
-	if err != nil {
-		return err
-	}
-
-	err = conn.listenOnConnectionStateChanges()
-	if err != nil {
-		return err
-	}
-
-	err = conn.signalCredentials()
-	if err != nil {
-		return err
-	}
-
-	conn.Status = StatusConnecting
-	log.Debugf("trying to connect to peer %s", conn.Config.RemoteWgKey.String())
-
-	// wait until credentials have been sent from the remote peer (will arrive via a signal server)
-	select {
-	case remoteAuth := <-conn.remoteAuthChannel:
-
-		log.Debugf("got a connection confirmation from peer %s", conn.Config.RemoteWgKey.String())
-
-		err = conn.agent.GatherCandidates()
-		if err != nil {
-			return err
-		}
-
-		isControlling := conn.Config.WgKey.PublicKey().String() > conn.Config.RemoteWgKey.String()
-		var remoteConn *ice.Conn
-		remoteConn, err = conn.openConnectionToRemote(isControlling, remoteAuth)
-		if err != nil {
-			log.Errorf("failed establishing connection with the remote peer %s %s", conn.Config.RemoteWgKey.String(), err)
-			return err
-		}
-
-		var pair *ice.CandidatePair
-		pair, err = conn.agent.GetSelectedCandidatePair()
-		if err != nil {
-			return err
-		}
-
-		useProxy := useProxy(pair)
-
-		// in case the remote peer is in the local network or one of the peers has public static IP -> no need for a Wireguard proxy, direct communication is possible.
-		if !useProxy {
-			log.Debugf("it is possible to establish a direct connection (without proxy) to peer %s - my addr: %s, remote addr: %s", conn.Config.RemoteWgKey.String(), pair.Local, pair.Remote)
-			err = conn.wgProxy.StartLocal(fmt.Sprintf("%s:%d", pair.Remote.Address(), iface.WgPort))
-			if err != nil {
-				return err
-			}
-
-		} else {
-			log.Debugf("establishing secure tunnel to peer %s via selected candidate pair %s", conn.Config.RemoteWgKey.String(), pair)
-			err = conn.wgProxy.Start(remoteConn)
-			if err != nil {
-				return err
-			}
-		}
-
-		relayed := pair.Remote.Type() == ice.CandidateTypeRelay || pair.Local.Type() == ice.CandidateTypeRelay
-
-		conn.Status = StatusConnected
-		log.Infof("opened connection to peer %s [localProxy=%v, relayed=%v]", conn.Config.RemoteWgKey.String(), useProxy, relayed)
-	case <-conn.closeCond.C:
-		conn.Status = StatusDisconnected
-		return fmt.Errorf("connection to peer %s has been closed", conn.Config.RemoteWgKey.String())
-	case <-time.After(timeout):
-		err = conn.Close()
-		if err != nil {
-			log.Warnf("error while closing connection to peer %s -> %s", conn.Config.RemoteWgKey.String(), err.Error())
-		}
-		conn.Status = StatusDisconnected
-		return fmt.Errorf("timeout of %vs exceeded while waiting for the remote peer %s", timeout.Seconds(), conn.Config.RemoteWgKey.String())
-	}
-
-	// wait until connection has been closed
-	<-conn.closeCond.C
-	conn.Status = StatusDisconnected
-	return fmt.Errorf("connection to peer %s has been closed", conn.Config.RemoteWgKey.String())
-}
-
-func isPublicIP(ip net.IP) bool {
-	if ip.IsLoopback() || ip.IsLinkLocalUnicast() || ip.IsLinkLocalMulticast() {
-		return false
-	}
-
-	for _, block := range privateIPBlocks {
-		if block.Contains(ip) {
-			return false
-		}
-	}
-	return true
-}
-
-//useProxy determines whether a direct connection (without a go proxy) is possible
-//There are 3 cases: one of the peers has a public IP or both peers are in the same private network
-//Please note, that this check happens when peers were already able to ping each other with ICE layer.
-func useProxy(pair *ice.CandidatePair) bool {
-	remoteIP := net.ParseIP(pair.Remote.Address())
-	myIp := net.ParseIP(pair.Local.Address())
-	remoteIsPublic := isPublicIP(remoteIP)
-	myIsPublic := isPublicIP(myIp)
-
-	//one of the hosts has a public IP
-	if remoteIsPublic && pair.Remote.Type() == ice.CandidateTypeHost {
-		return false
-	}
-	if myIsPublic && pair.Local.Type() == ice.CandidateTypeHost {
-		return false
-	}
-
-	if pair.Local.Type() == ice.CandidateTypeHost && pair.Remote.Type() == ice.CandidateTypeHost {
-		if !remoteIsPublic && !myIsPublic {
-			//both hosts are in the same private network
-			return false
-		}
-	}
-
-	return true
-}
-
-// Close Closes a peer connection
-func (conn *Connection) Close() error {
-	var err error
-	conn.closeCond.Do(func() {
-
-		log.Debugf("closing connection to peer %s", conn.Config.RemoteWgKey.String())
-
-		if a := conn.agent; a != nil {
-			e := a.Close()
-			if e != nil {
-				log.Warnf("error while closing ICE agent of peer connection %s", conn.Config.RemoteWgKey.String())
-				err = e
-			}
-		}
-
-		if c := conn.wgProxy; c != nil {
-			e := c.Close()
-			if e != nil {
-				log.Warnf("error while closingWireguard proxy connection of peer connection %s", conn.Config.RemoteWgKey.String())
-				err = e
-			}
-		}
-	})
-	return err
-}
-
-// OnAnswer Handles the answer from the other peer
-func (conn *Connection) OnAnswer(remoteAuth IceCredentials) error {
-
-	conn.remoteAuthCond.Do(func() {
-		log.Debugf("OnAnswer from peer %s", conn.Config.RemoteWgKey.String())
-		conn.remoteAuthChannel <- remoteAuth
-	})
-	return nil
-}
-
-// OnOffer Handles the offer from the other peer
-func (conn *Connection) OnOffer(remoteAuth IceCredentials) error {
-
-	conn.remoteAuthCond.Do(func() {
-		log.Debugf("OnOffer from peer %s", conn.Config.RemoteWgKey.String())
-		conn.remoteAuthChannel <- remoteAuth
-		uFrag, pwd, err := conn.agent.GetLocalUserCredentials()
-		if err != nil { //nolint
-		}
-
-		err = conn.signalAnswer(uFrag, pwd)
-		if err != nil { //nolint
-		}
-	})
-
-	return nil
-}
-
-// OnRemoteCandidate Handles remote candidate provided by the peer.
-func (conn *Connection) OnRemoteCandidate(candidate ice.Candidate) error {
-
-	log.Debugf("onRemoteCandidate from peer %s -> %s", conn.Config.RemoteWgKey.String(), candidate.String())
-
-	err := conn.agent.AddRemoteCandidate(candidate)
-	if err != nil {
-		return err
-	}
-
-	return nil
-}
-
-// openConnectionToRemote opens an ice.Conn to the remote peer. This is a real peer-to-peer connection
-// blocks until connection has been established
-func (conn *Connection) openConnectionToRemote(isControlling bool, credentials IceCredentials) (*ice.Conn, error) {
-	var realConn *ice.Conn
-	var err error
-
-	if isControlling {
-		realConn, err = conn.agent.Dial(context.TODO(), credentials.uFrag, credentials.pwd)
-	} else {
-		realConn, err = conn.agent.Accept(context.TODO(), credentials.uFrag, credentials.pwd)
-	}
-
-	if err != nil {
-		return nil, err
-	}
-
-	return realConn, err
-}
-
-// signalCredentials prepares local user credentials and signals them to the remote peer
-func (conn *Connection) signalCredentials() error {
-	localUFrag, localPwd, err := conn.agent.GetLocalUserCredentials()
-	if err != nil {
-		return err
-	}
-
-	err = conn.signalOffer(localUFrag, localPwd)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// listenOnLocalCandidates registers callback of an ICE Agent to receive new local connection candidates and then
-// signals them to the remote peer
-func (conn *Connection) listenOnLocalCandidates() error {
-	err := conn.agent.OnCandidate(func(candidate ice.Candidate) {
-		if candidate != nil {
-			log.Debugf("discovered local candidate %s", candidate.String())
-			err := conn.signalCandidate(candidate)
-			if err != nil {
-				log.Errorf("failed signaling candidate to the remote peer %s %s", conn.Config.RemoteWgKey.String(), err)
-				//todo ??
-				return
-			}
-		}
-	})
-
-	if err != nil {
-		return err
-	}
-
-	return nil
-}
-
-// listenOnConnectionStateChanges registers callback of an ICE Agent to track connection state
-func (conn *Connection) listenOnConnectionStateChanges() error {
-	err := conn.agent.OnConnectionStateChange(func(state ice.ConnectionState) {
-		log.Debugf("ICE Connection State has changed for peer %s -> %s", conn.Config.RemoteWgKey.String(), state.String())
-		if state == ice.ConnectionStateConnected {
-			// closed the connection has been established we can check the selected candidate pair
-			pair, err := conn.agent.GetSelectedCandidatePair()
-			if err != nil {
-				log.Errorf("failed selecting active ICE candidate pair %s", err)
-				return
-			}
-			log.Debugf("ICE connected to peer %s via a selected connnection candidate pair %s", conn.Config.RemoteWgKey.String(), pair)
-		} else if state == ice.ConnectionStateDisconnected || state == ice.ConnectionStateFailed {
-			err := conn.Close()
-			if err != nil {
-				log.Warnf("error while closing connection to peer %s -> %s", conn.Config.RemoteWgKey.String(), err.Error())
-			}
-		}
-	})
-
-	if err != nil {
-		return err
-	}
-
-	return nil
-}

client/internal/engine.go

@@ -3,56 +3,72 @@ package internal
 import (
 	"context"
 	"fmt"
-	"github.com/cenkalti/backoff/v4"
+	"math/rand"
+	"net"
+	"strings"
+	"sync"
+	"time"
+
 	"github.com/pion/ice/v2"
 	log "github.com/sirupsen/logrus"
+	"github.com/wiretrustee/wiretrustee/client/internal/peer"
+	"github.com/wiretrustee/wiretrustee/client/internal/proxy"
 	"github.com/wiretrustee/wiretrustee/iface"
 	mgm "github.com/wiretrustee/wiretrustee/management/client"
 	mgmProto "github.com/wiretrustee/wiretrustee/management/proto"
 	signal "github.com/wiretrustee/wiretrustee/signal/client"
 	sProto "github.com/wiretrustee/wiretrustee/signal/proto"
+	"github.com/wiretrustee/wiretrustee/util"
 	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
-	"strings"
-	"sync"
-	"time"
 )
 
-// PeerConnectionTimeout is a timeout of an initial connection attempt to a remote peer.
+// PeerConnectionTimeoutMax is a timeout of an initial connection attempt to a remote peer.
-// E.g. this peer will wait PeerConnectionTimeout for the remote peer to respond, if not successful then it will retry the connection attempt.
+// E.g. this peer will wait PeerConnectionTimeoutMax for the remote peer to respond,
-const PeerConnectionTimeout = 40 * time.Second
+// if not successful then it will retry the connection attempt.
+// Todo pass timeout at EnginConfig
+const (
+	PeerConnectionTimeoutMax = 45000 // ms
+	PeerConnectionTimeoutMin = 30000 // ms
+)
+
+const WgPort = 51820
 
 // EngineConfig is a config for the Engine
 type EngineConfig struct {
-	WgIface string
+	WgPort      int
+	WgIfaceName string
+
 	// WgAddr is a Wireguard local address (Wiretrustee Network IP)
 	WgAddr string
+
 	// WgPrivateKey is a Wireguard private key of our peer (it MUST never leave the machine)
 	WgPrivateKey wgtypes.Key
+
 	// IFaceBlackList is a list of network interfaces to ignore when discovering connection candidates (ICE related)
 	IFaceBlackList map[string]struct{}
 
 	PreSharedKey *wgtypes.Key
+
+	// UDPMuxPort default value 0 - the system will pick an available port
+	UDPMuxPort int
+
+	// UDPMuxSrflxPort default value 0 - the system will pick an available port
+	UDPMuxSrflxPort int
 }
 
 // Engine is a mechanism responsible for reacting on Signal and Management stream events and managing connections to the remote peers.
 type Engine struct {
 	// signal is a Signal Service client
-	signal *signal.Client
+	signal signal.Client
 	// mgmClient is a Management Service client
-	mgmClient *mgm.Client
+	mgmClient mgm.Client
-	// conns is a collection of remote peer connections indexed by local public key of the remote peers
+	// peerConns is a map that holds all the peers that are known to this peer
-	conns map[string]*Connection
+	peerConns map[string]*peer.Conn
 
-	// peerMux is used to sync peer operations (e.g. open connection, peer removal)
-	peerMux *sync.Mutex
 	// syncMsgMux is used to guarantee sequential Management Service message processing
 	syncMsgMux *sync.Mutex
 
 	config *EngineConfig
-
-	// wgPort is a Wireguard local listen port
-	wgPort int
-
 	// STUNs is a list of STUN servers used by ICE
 	STUNs []*ice.URL
 	// TURNs is a list of STUN servers used by ICE
@@ -61,6 +77,16 @@ type Engine struct {
 	cancel context.CancelFunc
 
 	ctx context.Context
+
+	wgInterface iface.WGIface
+
+	udpMux          ice.UDPMux
+	udpMuxSrflx     ice.UniversalUDPMux
+	udpMuxConn      *net.UDPConn
+	udpMuxConnSrflx *net.UDPConn
+
+	// networkSerial is the latest Serial (state ID) of the network sent by the Management service
+	networkSerial uint64
 }
 
 // Peer is an instance of the Connection Peer
@@ -70,32 +96,64 @@ type Peer struct {
 }
 
 // NewEngine creates a new Connection Engine
-func NewEngine(signalClient *signal.Client, mgmClient *mgm.Client, config *EngineConfig, cancel context.CancelFunc, ctx context.Context) *Engine {
+func NewEngine(
+	signalClient signal.Client, mgmClient mgm.Client, config *EngineConfig,
+	cancel context.CancelFunc, ctx context.Context,
+) *Engine {
 	return &Engine{
-		signal:     signalClient,
+		signal:        signalClient,
-		mgmClient:  mgmClient,
+		mgmClient:     mgmClient,
-		conns:      map[string]*Connection{},
+		peerConns:     map[string]*peer.Conn{},
-		peerMux:    &sync.Mutex{},
+		syncMsgMux:    &sync.Mutex{},
-		syncMsgMux: &sync.Mutex{},
+		config:        config,
-		config:     config,
+		STUNs:         []*ice.URL{},
-		STUNs:      []*ice.URL{},
+		TURNs:         []*ice.URL{},
-		TURNs:      []*ice.URL{},
+		cancel:        cancel,
-		cancel:     cancel,
+		ctx:           ctx,
-		ctx:        ctx,
+		networkSerial: 0,
 	}
 }
 
 func (e *Engine) Stop() error {
-	err := e.removeAllPeerConnections()
+	e.syncMsgMux.Lock()
+	defer e.syncMsgMux.Unlock()
+
+	err := e.removeAllPeers()
 	if err != nil {
 		return err
 	}
 
-	log.Debugf("removing Wiretrustee interface %s", e.config.WgIface)
+	log.Debugf("removing Wiretrustee interface %s", e.config.WgIfaceName)
-	err = iface.Close()
+	if e.wgInterface.Interface != nil {
-	if err != nil {
+		err = e.wgInterface.Close()
-		log.Errorf("failed closing Wiretrustee interface %s %v", e.config.WgIface, err)
+		if err != nil {
-		return err
+			log.Errorf("failed closing Wiretrustee interface %s %v", e.config.WgIfaceName, err)
+			return err
+		}
+	}
+
+	if e.udpMux != nil {
+		if err := e.udpMux.Close(); err != nil {
+			log.Debugf("close udp mux: %v", err)
+		}
+	}
+
+	if e.udpMuxSrflx != nil {
+		if err := e.udpMuxSrflx.Close(); err != nil {
+			log.Debugf("close server reflexive udp mux: %v", err)
+		}
+	}
+
+	if e.udpMuxConn != nil {
+		if err := e.udpMuxConn.Close(); err != nil {
+			log.Debugf("close udp mux connection: %v", err)
+		}
+	}
+
+	if e.udpMuxConnSrflx != nil {
+		if err := e.udpMuxConnSrflx.Close(); err != nil {
+			log.Debugf("close server reflexive udp mux connection: %v", err)
+		}
 	}
 
 	log.Infof("stopped Wiretrustee Engine")
@@ -107,29 +165,46 @@ func (e *Engine) Stop() error {
 // Connections to remote peers are not established here.
 // However, they will be established once an event with a list of peers to connect to will be received from Management Service
 func (e *Engine) Start() error {
+	e.syncMsgMux.Lock()
+	defer e.syncMsgMux.Unlock()
 
-	wgIface := e.config.WgIface
+	wgIfaceName := e.config.WgIfaceName
 	wgAddr := e.config.WgAddr
 	myPrivateKey := e.config.WgPrivateKey
+	var err error
 
-	err := iface.Create(wgIface, wgAddr)
+	e.wgInterface, err = iface.NewWGIface(wgIfaceName, wgAddr, iface.DefaultMTU)
 	if err != nil {
-		log.Errorf("failed creating interface %s: [%s]", wgIface, err.Error())
+		log.Errorf("failed creating wireguard interface instance %s: [%s]", wgIfaceName, err.Error())
 		return err
 	}
 
-	err = iface.Configure(wgIface, myPrivateKey.String())
+	e.udpMuxConn, err = net.ListenUDP("udp4", &net.UDPAddr{Port: e.config.UDPMuxPort})
 	if err != nil {
-		log.Errorf("failed configuring Wireguard interface [%s]: %s", wgIface, err.Error())
+		log.Errorf("failed listening on UDP port %d: [%s]", e.config.UDPMuxPort, err.Error())
 		return err
 	}
 
-	port, err := iface.GetListenPort(wgIface)
+	e.udpMuxConnSrflx, err = net.ListenUDP("udp4", &net.UDPAddr{Port: e.config.UDPMuxSrflxPort})
 	if err != nil {
-		log.Errorf("failed getting Wireguard listen port [%s]: %s", wgIface, err.Error())
+		log.Errorf("failed listening on UDP port %d: [%s]", e.config.UDPMuxSrflxPort, err.Error())
+		return err
+	}
+
+	e.udpMux = ice.NewUDPMuxDefault(ice.UDPMuxParams{UDPConn: e.udpMuxConn})
+	e.udpMuxSrflx = ice.NewUniversalUDPMuxDefault(ice.UniversalUDPMuxParams{UDPConn: e.udpMuxConnSrflx})
+
+	err = e.wgInterface.Create()
+	if err != nil {
+		log.Errorf("failed creating tunnel interface %s: [%s]", wgIfaceName, err.Error())
+		return err
+	}
+
+	err = e.wgInterface.Configure(myPrivateKey.String(), e.config.WgPort)
+	if err != nil {
+		log.Errorf("failed configuring Wireguard interface [%s]: %s", wgIfaceName, err.Error())
 		return err
 	}
-	e.wgPort = *port
 
 	e.receiveSignalEvents()
 	e.receiveManagementEvents()
@@ -137,64 +212,34 @@ func (e *Engine) Start() error {
 	return nil
 }
 
-// initializePeer peer agent attempt to open connection
+// removePeers finds and removes peers that do not exist anymore in the network map received from the Management Service
-func (e *Engine) initializePeer(peer Peer) {
+func (e *Engine) removePeers(peersUpdate []*mgmProto.RemotePeerConfig) error {
-	var backOff = backoff.WithContext(&backoff.ExponentialBackOff{
+	currentPeers := make([]string, 0, len(e.peerConns))
-		InitialInterval:     backoff.DefaultInitialInterval,
+	for p := range e.peerConns {
-		RandomizationFactor: backoff.DefaultRandomizationFactor,
+		currentPeers = append(currentPeers, p)
-		Multiplier:          backoff.DefaultMultiplier,
-		MaxInterval:         5 * time.Second,
-		MaxElapsedTime:      0, //never stop
-		Stop:                backoff.Stop,
-		Clock:               backoff.SystemClock,
-	}, e.ctx)
-
-	operation := func() error {
-
-		if e.signal.GetStatus() != signal.StreamConnected {
-			return fmt.Errorf("not opening connection to peer because Signal is unavailable")
-		}
-
-		_, err := e.openPeerConnection(e.wgPort, e.config.WgPrivateKey, peer)
-		e.peerMux.Lock()
-		defer e.peerMux.Unlock()
-		if _, ok := e.conns[peer.WgPubKey]; !ok {
-			log.Debugf("removed connection attempt to peer: %v, not retrying", peer.WgPubKey)
-			return nil
-		}
-
-		if err != nil {
-			log.Debugf("retrying connection because of error: %s", err.Error())
-			return err
-		}
-		return nil
 	}
 
-	err := backoff.Retry(operation, backOff)
+	newPeers := make([]string, 0, len(peersUpdate))
-	if err != nil {
+	for _, p := range peersUpdate {
-		// should actually never happen
+		newPeers = append(newPeers, p.GetWgPubKey())
-		panic(err)
 	}
-}
 
-func (e *Engine) removePeerConnections(peers []string) error {
+	toRemove := util.SliceDiff(currentPeers, newPeers)
-	e.peerMux.Lock()
+
-	defer e.peerMux.Unlock()
+	for _, p := range toRemove {
-	for _, peer := range peers {
+		err := e.removePeer(p)
-		err := e.removePeerConnection(peer)
 		if err != nil {
 			return err
 		}
+		log.Infof("removed peer %s", p)
 	}
 	return nil
 }
 
-func (e *Engine) removeAllPeerConnections() error {
+func (e *Engine) removeAllPeers() error {
 	log.Debugf("removing all peer connections")
-	e.peerMux.Lock()
+	for p := range e.peerConns {
-	defer e.peerMux.Unlock()
+		err := e.removePeer(p)
-	for peer := range e.conns {
-		err := e.removePeerConnection(peer)
 		if err != nil {
 			return err
 		}
@@ -202,70 +247,62 @@ func (e *Engine) removeAllPeerConnections() error {
 	return nil
 }
 
-// removePeerConnection closes existing peer connection and removes peer
+// removePeer closes an existing peer connection and removes a peer
-func (e *Engine) removePeerConnection(peerKey string) error {
+func (e *Engine) removePeer(peerKey string) error {
-	conn, exists := e.conns[peerKey]
+	log.Debugf("removing peer from engine %s", peerKey)
-	if exists && conn != nil {
+	conn, exists := e.peerConns[peerKey]
-		delete(e.conns, peerKey)
+	if exists {
-		return conn.Close()
+		delete(e.peerConns, peerKey)
+		err := conn.Close()
+		if err != nil {
+			switch err.(type) {
+			case *peer.ConnectionAlreadyClosedError:
+				return nil
+			default:
+				return err
+			}
+		}
 	}
-	log.Infof("removed connection to peer %s", peerKey)
 	return nil
 }
 
 // GetPeerConnectionStatus returns a connection Status or nil if peer connection wasn't found
-func (e *Engine) GetPeerConnectionStatus(peerKey string) *Status {
+func (e *Engine) GetPeerConnectionStatus(peerKey string) peer.ConnStatus {
-	e.peerMux.Lock()
+	conn, exists := e.peerConns[peerKey]
-	defer e.peerMux.Unlock()
-
-	conn, exists := e.conns[peerKey]
 	if exists && conn != nil {
-		return &conn.Status
+		return conn.Status()
 	}
 
-	return nil
+	return -1
 }
 
-// openPeerConnection opens a new remote peer connection
+func (e *Engine) GetPeers() []string {
-func (e *Engine) openPeerConnection(wgPort int, myKey wgtypes.Key, peer Peer) (*Connection, error) {
+	e.syncMsgMux.Lock()
-	e.peerMux.Lock()
+	defer e.syncMsgMux.Unlock()
 
-	remoteKey, _ := wgtypes.ParseKey(peer.WgPubKey)
+	peers := []string{}
-	connConfig := &ConnConfig{
+	for s := range e.peerConns {
-		WgListenAddr:   fmt.Sprintf("127.0.0.1:%d", wgPort),
+		peers = append(peers, s)
-		WgPeerIP:       e.config.WgAddr,
-		WgIface:        e.config.WgIface,
-		WgAllowedIPs:   peer.WgAllowedIps,
-		WgKey:          myKey,
-		RemoteWgKey:    remoteKey,
-		StunTurnURLS:   append(e.STUNs, e.TURNs...),
-		iFaceBlackList: e.config.IFaceBlackList,
-		PreSharedKey:   e.config.PreSharedKey,
 	}
-
+	return peers
-	signalOffer := func(uFrag string, pwd string) error {
-		return signalAuth(uFrag, pwd, myKey, remoteKey, e.signal, false)
-	}
-
-	signalAnswer := func(uFrag string, pwd string) error {
-		return signalAuth(uFrag, pwd, myKey, remoteKey, e.signal, true)
-	}
-	signalCandidate := func(candidate ice.Candidate) error {
-		return signalCandidate(candidate, myKey, remoteKey, e.signal)
-	}
-	conn := NewConnection(*connConfig, signalCandidate, signalOffer, signalAnswer)
-	e.conns[remoteKey.String()] = conn
-	e.peerMux.Unlock()
-
-	// blocks until the connection is open (or timeout)
-	err := conn.Open(PeerConnectionTimeout)
-	if err != nil {
-		return nil, err
-	}
-	return conn, nil
 }
 
-func signalCandidate(candidate ice.Candidate, myKey wgtypes.Key, remoteKey wgtypes.Key, s *signal.Client) error {
+// GetConnectedPeers returns a connection Status or nil if peer connection wasn't found
+func (e *Engine) GetConnectedPeers() []string {
+	e.syncMsgMux.Lock()
+	defer e.syncMsgMux.Unlock()
+
+	peers := []string{}
+	for s, conn := range e.peerConns {
+		if conn.Status() == peer.StatusConnected {
+			peers = append(peers, s)
+		}
+	}
+
+	return peers
+}
+
+func signalCandidate(candidate ice.Candidate, myKey wgtypes.Key, remoteKey wgtypes.Key, s signal.Client) error {
 	err := s.Send(&sProto.Message{
 		Key:       myKey.PublicKey().String(),
 		RemoteKey: remoteKey.String(),
@@ -276,15 +313,14 @@ func signalCandidate(candidate ice.Candidate, myKey wgtypes.Key, remoteKey wgtyp
 	})
 	if err != nil {
 		log.Errorf("failed signaling candidate to the remote peer %s %s", remoteKey.String(), err)
-		//todo ??
+		// todo ??
 		return err
 	}
 
 	return nil
 }
 
-func signalAuth(uFrag string, pwd string, myKey wgtypes.Key, remoteKey wgtypes.Key, s *signal.Client, isAnswer bool) error {
+func signalAuth(uFrag string, pwd string, myKey wgtypes.Key, remoteKey wgtypes.Key, s signal.Client, isAnswer bool) error {
-
 	var t sProto.Body_Type
 	if isAnswer {
 		t = sProto.Body_ANSWER
@@ -294,7 +330,8 @@ func signalAuth(uFrag string, pwd string, myKey wgtypes.Key, remoteKey wgtypes.K
 
 	msg, err := signal.MarshalCredential(myKey, remoteKey, &signal.Credential{
 		UFrag: uFrag,
-		Pwd:   pwd}, t)
+		Pwd:   pwd,
+	}, t)
 	if err != nil {
 		return err
 	}
@@ -306,37 +343,41 @@ func signalAuth(uFrag string, pwd string, myKey wgtypes.Key, remoteKey wgtypes.K
 	return nil
 }
 
+func (e *Engine) handleSync(update *mgmProto.SyncResponse) error {
+	e.syncMsgMux.Lock()
+	defer e.syncMsgMux.Unlock()
+
+	if update.GetWiretrusteeConfig() != nil {
+		err := e.updateTURNs(update.GetWiretrusteeConfig().GetTurns())
+		if err != nil {
+			return err
+		}
+
+		err = e.updateSTUNs(update.GetWiretrusteeConfig().GetStuns())
+		if err != nil {
+			return err
+		}
+
+		// todo update signal
+	}
+
+	if update.GetNetworkMap() != nil {
+		// only apply new changes and ignore old ones
+		err := e.updateNetworkMap(update.GetNetworkMap())
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 // receiveManagementEvents connects to the Management Service event stream to receive updates from the management service
 // E.g. when a new peer has been registered and we are allowed to connect to it.
 func (e *Engine) receiveManagementEvents() {
 	go func() {
 		err := e.mgmClient.Sync(func(update *mgmProto.SyncResponse) error {
-			e.syncMsgMux.Lock()
+			return e.handleSync(update)
-			defer e.syncMsgMux.Unlock()
-
-			if update.GetWiretrusteeConfig() != nil {
-				err := e.updateTURNs(update.GetWiretrusteeConfig().GetTurns())
-				if err != nil {
-					return err
-				}
-
-				err = e.updateSTUNs(update.GetWiretrusteeConfig().GetStuns())
-				if err != nil {
-					return err
-				}
-
-				//todo update signal
-			}
-
-			if update.GetRemotePeers() != nil || update.GetRemotePeersIsEmpty() {
-				// empty arrays are serialized by protobuf to null, but for our case empty array is a valid state.
-				err := e.updatePeers(update.GetRemotePeers())
-				if err != nil {
-					return err
-				}
-			}
-
-			return nil
 		})
 		if err != nil {
 			// happens if management is unavailable for a long time.
@@ -387,102 +428,188 @@ func (e *Engine) updateTURNs(turns []*mgmProto.ProtectedHostConfig) error {
 	return nil
 }
 
-func (e *Engine) updatePeers(remotePeers []*mgmProto.RemotePeerConfig) error {
+func (e *Engine) updateNetworkMap(networkMap *mgmProto.NetworkMap) error {
-	log.Debugf("got peers update from Management Service, updating")
+	serial := networkMap.GetSerial()
-	remotePeerMap := make(map[string]struct{})
+	if e.networkSerial > serial {
-	for _, peer := range remotePeers {
+		log.Debugf("received outdated NetworkMap with serial %d, ignoring", serial)
-		remotePeerMap[peer.GetWgPubKey()] = struct{}{}
+		return nil
 	}
 
-	//remove peers that are no longer available for us
+	log.Debugf("got peers update from Management Service, total peers to connect to = %d", len(networkMap.GetRemotePeers()))
-	toRemove := []string{}
+
-	for p := range e.conns {
+	// cleanup request, most likely our peer has been deleted
-		if _, ok := remotePeerMap[p]; !ok {
+	if networkMap.GetRemotePeersIsEmpty() {
-			toRemove = append(toRemove, p)
+		err := e.removeAllPeers()
+		if err != nil {
+			return err
+		}
+	} else {
+		err := e.removePeers(networkMap.GetRemotePeers())
+		if err != nil {
+			return err
+		}
+
+		err = e.addNewPeers(networkMap.GetRemotePeers())
+		if err != nil {
+			return err
 		}
 	}
-	err := e.removePeerConnections(toRemove)
-	if err != nil {
-		return err
-	}
 
-	// add new peers
+	e.networkSerial = serial
-	for _, peer := range remotePeers {
+	return nil
-		peerKey := peer.GetWgPubKey()
+}
-		peerIPs := peer.GetAllowedIps()
+
-		if _, ok := e.conns[peerKey]; !ok {
+// addNewPeers finds and adds peers that were not know before but arrived from the Management service with the update
-			go e.initializePeer(Peer{
+func (e *Engine) addNewPeers(peersUpdate []*mgmProto.RemotePeerConfig) error {
-				WgPubKey:     peerKey,
+	for _, p := range peersUpdate {
-				WgAllowedIps: strings.Join(peerIPs, ","),
+		peerKey := p.GetWgPubKey()
-			})
+		peerIPs := p.GetAllowedIps()
+		if _, ok := e.peerConns[peerKey]; !ok {
+			conn, err := e.createPeerConn(peerKey, strings.Join(peerIPs, ","))
+			if err != nil {
+				return err
+			}
+			e.peerConns[peerKey] = conn
+
+			go e.connWorker(conn, peerKey)
 		}
 
 	}
 	return nil
 }
 
+func (e Engine) connWorker(conn *peer.Conn, peerKey string) {
+	for {
+
+		// randomize starting time a bit
+		min := 500
+		max := 2000
+		time.Sleep(time.Duration(rand.Intn(max-min)+min) * time.Millisecond)
+
+		// if peer has been removed -> give up
+		if !e.peerExists(peerKey) {
+			log.Infof("peer %s doesn't exist anymore, won't retry connection", peerKey)
+			return
+		}
+
+		if !e.signal.Ready() {
+			log.Infof("signal client isn't ready, skipping connection attempt %s", peerKey)
+			continue
+		}
+
+		err := conn.Open()
+		if err != nil {
+			log.Debugf("connection to peer %s failed: %v", peerKey, err)
+		}
+	}
+}
+
+func (e Engine) peerExists(peerKey string) bool {
+	e.syncMsgMux.Lock()
+	defer e.syncMsgMux.Unlock()
+	_, ok := e.peerConns[peerKey]
+	return ok
+}
+
+func (e Engine) createPeerConn(pubKey string, allowedIPs string) (*peer.Conn, error) {
+	var stunTurn []*ice.URL
+	stunTurn = append(stunTurn, e.STUNs...)
+	stunTurn = append(stunTurn, e.TURNs...)
+
+	interfaceBlacklist := make([]string, 0, len(e.config.IFaceBlackList))
+	for k := range e.config.IFaceBlackList {
+		interfaceBlacklist = append(interfaceBlacklist, k)
+	}
+
+	proxyConfig := proxy.Config{
+		RemoteKey:    pubKey,
+		WgListenAddr: fmt.Sprintf("127.0.0.1:%d", e.config.WgPort),
+		WgInterface:  e.wgInterface,
+		AllowedIps:   allowedIPs,
+		PreSharedKey: e.config.PreSharedKey,
+	}
+
+	// randomize connection timeout
+	timeout := time.Duration(rand.Intn(PeerConnectionTimeoutMax-PeerConnectionTimeoutMin)+PeerConnectionTimeoutMin) * time.Millisecond
+	config := peer.ConnConfig{
+		Key:                pubKey,
+		LocalKey:           e.config.WgPrivateKey.PublicKey().String(),
+		StunTurn:           stunTurn,
+		InterfaceBlackList: interfaceBlacklist,
+		Timeout:            timeout,
+		UDPMux:             e.udpMux,
+		UDPMuxSrflx:        e.udpMuxSrflx,
+		ProxyConfig:        proxyConfig,
+	}
+
+	peerConn, err := peer.NewConn(config)
+	if err != nil {
+		return nil, err
+	}
+
+	wgPubKey, err := wgtypes.ParseKey(pubKey)
+	if err != nil {
+		return nil, err
+	}
+
+	signalOffer := func(uFrag string, pwd string) error {
+		return signalAuth(uFrag, pwd, e.config.WgPrivateKey, wgPubKey, e.signal, false)
+	}
+
+	signalCandidate := func(candidate ice.Candidate) error {
+		return signalCandidate(candidate, e.config.WgPrivateKey, wgPubKey, e.signal)
+	}
+
+	signalAnswer := func(uFrag string, pwd string) error {
+		return signalAuth(uFrag, pwd, e.config.WgPrivateKey, wgPubKey, e.signal, true)
+	}
+
+	peerConn.SetSignalCandidate(signalCandidate)
+	peerConn.SetSignalOffer(signalOffer)
+	peerConn.SetSignalAnswer(signalAnswer)
+
+	return peerConn, nil
+}
+
 // receiveSignalEvents connects to the Signal Service event stream to negotiate connection with remote peers
 func (e *Engine) receiveSignalEvents() {
-
 	go func() {
 		// connect to a stream of messages coming from the signal server
 		err := e.signal.Receive(func(msg *sProto.Message) error {
-
 			e.syncMsgMux.Lock()
 			defer e.syncMsgMux.Unlock()
 
-			conn := e.conns[msg.Key]
+			conn := e.peerConns[msg.Key]
 			if conn == nil {
 				return fmt.Errorf("wrongly addressed message %s", msg.Key)
 			}
 
-			if conn.Config.RemoteWgKey.String() != msg.Key {
-				return fmt.Errorf("unknown peer %s", msg.Key)
-			}
-
 			switch msg.GetBody().Type {
 			case sProto.Body_OFFER:
 				remoteCred, err := signal.UnMarshalCredential(msg)
 				if err != nil {
 					return err
 				}
-				err = conn.OnOffer(IceCredentials{
+				conn.OnRemoteOffer(peer.IceCredentials{
-					uFrag: remoteCred.UFrag,
+					UFrag: remoteCred.UFrag,
-					pwd:   remoteCred.Pwd,
+					Pwd:   remoteCred.Pwd,
 				})
-
-				if err != nil {
-					return err
-				}
-
-				return nil
 			case sProto.Body_ANSWER:
 				remoteCred, err := signal.UnMarshalCredential(msg)
 				if err != nil {
 					return err
 				}
-				err = conn.OnAnswer(IceCredentials{
+				conn.OnRemoteAnswer(peer.IceCredentials{
-					uFrag: remoteCred.UFrag,
+					UFrag: remoteCred.UFrag,
-					pwd:   remoteCred.Pwd,
+					Pwd:   remoteCred.Pwd,
 				})
-
-				if err != nil {
-					return err
-				}
-
 			case sProto.Body_CANDIDATE:
-
 				candidate, err := ice.UnmarshalCandidate(msg.GetBody().Payload)
 				if err != nil {
 					log.Errorf("failed on parsing remote candidate %s -> %s", candidate, err)
 					return err
 				}
-
+				conn.OnRemoteCandidate(candidate)
-				err = conn.OnRemoteCandidate(candidate)
-				if err != nil {
-					log.Errorf("error handling CANDIATE from %s", msg.Key)
-					return err
-				}
 			}
 
 			return nil

client/internal/engine_test.go

@@ -0,0 +1,468 @@
+package internal
+
+import (
+	"context"
+	"fmt"
+	"net"
+	"os"
+	"path/filepath"
+	"runtime"
+	"sync"
+	"testing"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+	"github.com/wiretrustee/wiretrustee/client/system"
+	mgmt "github.com/wiretrustee/wiretrustee/management/client"
+	mgmtProto "github.com/wiretrustee/wiretrustee/management/proto"
+	"github.com/wiretrustee/wiretrustee/management/server"
+	signal "github.com/wiretrustee/wiretrustee/signal/client"
+	"github.com/wiretrustee/wiretrustee/signal/proto"
+	signalServer "github.com/wiretrustee/wiretrustee/signal/server"
+	"github.com/wiretrustee/wiretrustee/util"
+	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/keepalive"
+)
+
+var (
+	kaep = keepalive.EnforcementPolicy{
+		MinTime:             15 * time.Second,
+		PermitWithoutStream: true,
+	}
+
+	kasp = keepalive.ServerParameters{
+		MaxConnectionIdle:     15 * time.Second,
+		MaxConnectionAgeGrace: 5 * time.Second,
+		Time:                  5 * time.Second,
+		Timeout:               2 * time.Second,
+	}
+)
+
+func TestEngine_UpdateNetworkMap(t *testing.T) {
+
+	// test setup
+	key, err := wgtypes.GeneratePrivateKey()
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	engine := NewEngine(&signal.MockClient{}, &mgmt.MockClient{}, &EngineConfig{
+		WgIfaceName:  "utun100",
+		WgAddr:       "100.64.0.1/24",
+		WgPrivateKey: key,
+		WgPort:       33100,
+	}, cancel, ctx)
+
+	type testCase struct {
+		name       string
+		networkMap *mgmtProto.NetworkMap
+
+		expectedLen    int
+		expectedPeers  []string
+		expectedSerial uint64
+	}
+
+	peer1 := &mgmtProto.RemotePeerConfig{
+		WgPubKey:   "RRHf3Ma6z6mdLbriAJbqhX7+nM/B71lgw2+91q3LfhU=",
+		AllowedIps: []string{"100.64.0.10/24"},
+	}
+
+	peer2 := &mgmtProto.RemotePeerConfig{
+		WgPubKey:   "LLHf3Ma6z6mdLbriAJbqhX7+nM/B71lgw2+91q3LfhU=",
+		AllowedIps: []string{"100.64.0.11/24"},
+	}
+
+	peer3 := &mgmtProto.RemotePeerConfig{
+		WgPubKey:   "GGHf3Ma6z6mdLbriAJbqhX7+nM/B71lgw2+91q3LfhU=",
+		AllowedIps: []string{"100.64.0.12/24"},
+	}
+
+	case1 := testCase{
+		name: "input with a new peer to add",
+		networkMap: &mgmtProto.NetworkMap{
+			Serial:     1,
+			PeerConfig: nil,
+			RemotePeers: []*mgmtProto.RemotePeerConfig{
+				peer1,
+			},
+			RemotePeersIsEmpty: false,
+		},
+		expectedLen:    1,
+		expectedPeers:  []string{peer1.GetWgPubKey()},
+		expectedSerial: 1,
+	}
+
+	// 2nd case - one extra peer added and network map has Serial grater than local => apply the update
+	case2 := testCase{
+		name: "input with an old peer and a new peer to add",
+		networkMap: &mgmtProto.NetworkMap{
+			Serial:     2,
+			PeerConfig: nil,
+			RemotePeers: []*mgmtProto.RemotePeerConfig{
+				peer1, peer2,
+			},
+			RemotePeersIsEmpty: false,
+		},
+		expectedLen:    2,
+		expectedPeers:  []string{peer1.GetWgPubKey(), peer2.GetWgPubKey()},
+		expectedSerial: 2,
+	}
+
+	case3 := testCase{
+		name: "input with outdated (old) update to ignore",
+		networkMap: &mgmtProto.NetworkMap{
+			Serial:     0,
+			PeerConfig: nil,
+			RemotePeers: []*mgmtProto.RemotePeerConfig{
+				peer1, peer2, peer3,
+			},
+			RemotePeersIsEmpty: false,
+		},
+		expectedLen:    2,
+		expectedPeers:  []string{peer1.GetWgPubKey(), peer2.GetWgPubKey()},
+		expectedSerial: 2,
+	}
+
+	case4 := testCase{
+		name: "input with one peer to remove and one new to add",
+		networkMap: &mgmtProto.NetworkMap{
+			Serial:     4,
+			PeerConfig: nil,
+			RemotePeers: []*mgmtProto.RemotePeerConfig{
+				peer2, peer3,
+			},
+			RemotePeersIsEmpty: false,
+		},
+		expectedLen:    2,
+		expectedPeers:  []string{peer2.GetWgPubKey(), peer3.GetWgPubKey()},
+		expectedSerial: 4,
+	}
+
+	case5 := testCase{
+		name: "input with all peers to remove",
+		networkMap: &mgmtProto.NetworkMap{
+			Serial:             5,
+			PeerConfig:         nil,
+			RemotePeers:        []*mgmtProto.RemotePeerConfig{},
+			RemotePeersIsEmpty: true,
+		},
+		expectedLen:    0,
+		expectedPeers:  nil,
+		expectedSerial: 5,
+	}
+
+	for _, c := range []testCase{case1, case2, case3, case4, case5} {
+
+		t.Run(c.name, func(t *testing.T) {
+			err = engine.updateNetworkMap(c.networkMap)
+			if err != nil {
+				t.Fatal(err)
+				return
+			}
+
+			if len(engine.peerConns) != c.expectedLen {
+				t.Errorf("expecting Engine.peerConns to be of size %d, got %d", c.expectedLen, len(engine.peerConns))
+			}
+
+			if engine.networkSerial != c.expectedSerial {
+				t.Errorf("expecting Engine.networkSerial to be equal to %d, actual %d", c.expectedSerial, engine.networkSerial)
+			}
+
+			for _, p := range c.expectedPeers {
+				if _, ok := engine.peerConns[p]; !ok {
+					t.Errorf("expecting Engine.peerConns to contain peer %s", p)
+				}
+			}
+		})
+
+	}
+
+}
+
+func TestEngine_Sync(t *testing.T) {
+
+	key, err := wgtypes.GeneratePrivateKey()
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	// feed updates to Engine via mocked Management client
+	updates := make(chan *mgmtProto.SyncResponse)
+	defer close(updates)
+	syncFunc := func(msgHandler func(msg *mgmtProto.SyncResponse) error) error {
+
+		for msg := range updates {
+			err := msgHandler(msg)
+			if err != nil {
+				t.Fatal(err)
+			}
+		}
+		return nil
+	}
+
+	engine := NewEngine(&signal.MockClient{}, &mgmt.MockClient{SyncFunc: syncFunc}, &EngineConfig{
+		WgIfaceName:  "utun100",
+		WgAddr:       "100.64.0.1/24",
+		WgPrivateKey: key,
+		WgPort:       33100,
+	}, cancel, ctx)
+
+	defer func() {
+		err := engine.Stop()
+		if err != nil {
+			return
+		}
+	}()
+
+	err = engine.Start()
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	peer1 := &mgmtProto.RemotePeerConfig{
+		WgPubKey:   "RRHf3Ma6z6mdLbriAJbqhX7+nM/B71lgw2+91q3LfhU=",
+		AllowedIps: []string{"100.64.0.10/24"},
+	}
+	peer2 := &mgmtProto.RemotePeerConfig{
+		WgPubKey:   "LLHf3Ma6z6mdLbriAJbqhX9+nM/B71lgw2+91q3LlhU=",
+		AllowedIps: []string{"100.64.0.11/24"},
+	}
+	peer3 := &mgmtProto.RemotePeerConfig{
+		WgPubKey:   "GGHf3Ma6z6mdLbriAJbqhX9+nM/B71lgw2+91q3LlhU=",
+		AllowedIps: []string{"100.64.0.12/24"},
+	}
+	// 1st update with just 1 peer and serial larger than the current serial of the engine => apply update
+	updates <- &mgmtProto.SyncResponse{
+		NetworkMap: &mgmtProto.NetworkMap{
+			Serial:             10,
+			PeerConfig:         nil,
+			RemotePeers:        []*mgmtProto.RemotePeerConfig{peer1, peer2, peer3},
+			RemotePeersIsEmpty: false,
+		},
+	}
+
+	timeout := time.After(time.Second * 2)
+	for {
+		select {
+		case <-timeout:
+			t.Fatalf("timeout while waiting for test to finish")
+			return
+		default:
+		}
+
+		if len(engine.GetPeers()) == 3 && engine.networkSerial == 10 {
+			break
+		}
+	}
+
+}
+
+func TestEngine_MultiplePeers(t *testing.T) {
+
+	//log.SetLevel(log.DebugLevel)
+
+	dir := t.TempDir()
+
+	err := util.CopyFileContents("../testdata/store.json", filepath.Join(dir, "store.json"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		err = os.Remove(filepath.Join(dir, "store.json")) //nolint
+		if err != nil {
+			t.Fatal(err)
+			return
+		}
+	}()
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	sport := 10010
+	sigServer, err := startSignal(sport)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+	defer sigServer.Stop()
+	mport := 33081
+	mgmtServer, err := startManagement(mport, dir)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+	defer mgmtServer.GracefulStop()
+
+	setupKey := "A2C8E62B-38F5-4553-B31E-DD66C696CEBB"
+
+	mu := sync.Mutex{}
+	engines := []*Engine{}
+	numPeers := 10
+	wg := sync.WaitGroup{}
+	wg.Add(numPeers)
+	// create and start peers
+	for i := 0; i < numPeers; i++ {
+		j := i
+		go func() {
+			engine, err := createEngine(ctx, cancel, setupKey, j, mport, sport)
+			if err != nil {
+				return
+			}
+			mu.Lock()
+			defer mu.Unlock()
+			engine.Start() //nolint
+			engines = append(engines, engine)
+			wg.Done()
+		}()
+	}
+
+	// wait until all have been created and started
+	wg.Wait()
+	// check whether all the peer have expected peers connected
+
+	expectedConnected := numPeers * (numPeers - 1)
+	// adjust according to timeouts
+	timeout := 50 * time.Second
+	timeoutChan := time.After(timeout)
+	for {
+		select {
+		case <-timeoutChan:
+			t.Fatalf("waiting for expected connections timeout after %s", timeout.String())
+			return
+		default:
+		}
+		time.Sleep(time.Second)
+		totalConnected := 0
+		for _, engine := range engines {
+			totalConnected = totalConnected + len(engine.GetConnectedPeers())
+		}
+		if totalConnected == expectedConnected {
+			log.Debugf("total connected=%d", totalConnected)
+			break
+		}
+		log.Infof("total connected=%d", totalConnected)
+	}
+
+	// cleanup test
+	for _, peerEngine := range engines {
+		errStop := peerEngine.mgmClient.Close()
+		if errStop != nil {
+			log.Infoln("got error trying to close management clients from engine: ", errStop)
+		}
+		errStop = peerEngine.Stop()
+		if errStop != nil {
+			log.Infoln("got error trying to close testing peers engine: ", errStop)
+		}
+	}
+}
+
+func createEngine(ctx context.Context, cancel context.CancelFunc, setupKey string, i int, mport int, sport int) (*Engine, error) {
+
+	key, err := wgtypes.GeneratePrivateKey()
+	if err != nil {
+		return nil, err
+	}
+	mgmtClient, err := mgmt.NewClient(ctx, fmt.Sprintf("localhost:%d", mport), key, false)
+	if err != nil {
+		return nil, err
+	}
+	signalClient, err := signal.NewClient(ctx, fmt.Sprintf("localhost:%d", sport), key, false)
+	if err != nil {
+		return nil, err
+	}
+
+	publicKey, err := mgmtClient.GetServerPublicKey()
+	if err != nil {
+		return nil, err
+	}
+
+	info := system.GetInfo()
+	resp, err := mgmtClient.Register(*publicKey, setupKey, info)
+	if err != nil {
+		return nil, err
+	}
+
+	var ifaceName string
+	if runtime.GOOS == "darwin" {
+		ifaceName = fmt.Sprintf("utun1%d", i)
+	} else {
+		ifaceName = fmt.Sprintf("wt%d", i)
+	}
+
+	wgPort := 33100 + i
+	conf := &EngineConfig{
+		WgIfaceName:  ifaceName,
+		WgAddr:       resp.PeerConfig.Address,
+		WgPrivateKey: key,
+		WgPort:       wgPort,
+	}
+
+	return NewEngine(signalClient, mgmtClient, conf, cancel, ctx), nil
+}
+
+func startSignal(port int) (*grpc.Server, error) {
+	s := grpc.NewServer(grpc.KeepaliveEnforcementPolicy(kaep), grpc.KeepaliveParams(kasp))
+
+	lis, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
+	if err != nil {
+		log.Fatalf("failed to listen: %v", err)
+	}
+
+	proto.RegisterSignalExchangeServer(s, signalServer.NewServer())
+
+	go func() {
+		if err = s.Serve(lis); err != nil {
+			log.Fatalf("failed to serve: %v", err)
+		}
+	}()
+
+	return s, nil
+}
+
+func startManagement(port int, dataDir string) (*grpc.Server, error) {
+
+	config := &server.Config{
+		Stuns:      []*server.Host{},
+		TURNConfig: &server.TURNConfig{},
+		Signal: &server.Host{
+			Proto: "http",
+			URI:   "localhost:10000",
+		},
+		Datadir:    dataDir,
+		HttpConfig: nil,
+	}
+
+	lis, err := net.Listen("tcp", fmt.Sprintf("localhost:%d", port))
+	if err != nil {
+		return nil, err
+	}
+	s := grpc.NewServer(grpc.KeepaliveEnforcementPolicy(kaep), grpc.KeepaliveParams(kasp))
+	store, err := server.NewStore(config.Datadir)
+	if err != nil {
+		log.Fatalf("failed creating a store: %s: %v", config.Datadir, err)
+	}
+	peersUpdateManager := server.NewPeersUpdateManager()
+	accountManager := server.NewManager(store, peersUpdateManager, nil)
+	turnManager := server.NewTimeBasedAuthSecretsManager(peersUpdateManager, config.TURNConfig)
+	mgmtServer, err := server.NewServer(config, accountManager, peersUpdateManager, turnManager)
+	if err != nil {
+		return nil, err
+	}
+	mgmtProto.RegisterManagementServiceServer(s, mgmtServer)
+	go func() {
+		if err = s.Serve(lis); err != nil {
+			log.Fatalf("failed to serve: %v", err)
+		}
+	}()
+
+	return s, nil
+}

client/internal/peer/conn.go

@@ -0,0 +1,446 @@
+package peer
+
+import (
+	"context"
+	"golang.zx2c4.com/wireguard/wgctrl"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/pion/ice/v2"
+	log "github.com/sirupsen/logrus"
+	"github.com/wiretrustee/wiretrustee/client/internal/proxy"
+)
+
+// ConnConfig is a peer Connection configuration
+type ConnConfig struct {
+
+	// Key is a public key of a remote peer
+	Key string
+	// LocalKey is a public key of a local peer
+	LocalKey string
+
+	// StunTurn is a list of STUN and TURN URLs
+	StunTurn []*ice.URL
+
+	// InterfaceBlackList is a list of machine interfaces that should be filtered out by ICE Candidate gathering
+	// (e.g. if eth0 is in the list, host candidate of this interface won't be used)
+	InterfaceBlackList []string
+
+	Timeout time.Duration
+
+	ProxyConfig proxy.Config
+
+	UDPMux      ice.UDPMux
+	UDPMuxSrflx ice.UniversalUDPMux
+}
+
+// IceCredentials ICE protocol credentials struct
+type IceCredentials struct {
+	UFrag string
+	Pwd   string
+}
+
+type Conn struct {
+	config ConnConfig
+	mu     sync.Mutex
+
+	// signalCandidate is a handler function to signal remote peer about local connection candidate
+	signalCandidate func(candidate ice.Candidate) error
+	// signalOffer is a handler function to signal remote peer our connection offer (credentials)
+	signalOffer  func(uFrag string, pwd string) error
+	signalAnswer func(uFrag string, pwd string) error
+
+	// remoteOffersCh is a channel used to wait for remote credentials to proceed with the connection
+	remoteOffersCh chan IceCredentials
+	// remoteAnswerCh is a channel used to wait for remote credentials answer (confirmation of our offer) to proceed with the connection
+	remoteAnswerCh     chan IceCredentials
+	closeCh            chan struct{}
+	ctx                context.Context
+	notifyDisconnected context.CancelFunc
+
+	agent  *ice.Agent
+	status ConnStatus
+
+	proxy proxy.Proxy
+}
+
+// NewConn creates a new not opened Conn to the remote peer.
+// To establish a connection run Conn.Open
+func NewConn(config ConnConfig) (*Conn, error) {
+	return &Conn{
+		config:         config,
+		mu:             sync.Mutex{},
+		status:         StatusDisconnected,
+		closeCh:        make(chan struct{}),
+		remoteOffersCh: make(chan IceCredentials),
+		remoteAnswerCh: make(chan IceCredentials),
+	}, nil
+}
+
+// interfaceFilter is a function passed to ICE Agent to filter out blacklisted interfaces
+func interfaceFilter(blackList []string) func(string) bool {
+	var blackListMap map[string]struct{}
+	if blackList != nil {
+		blackListMap = make(map[string]struct{})
+		for _, s := range blackList {
+			blackListMap[s] = struct{}{}
+		}
+	}
+	return func(iFace string) bool {
+
+		_, ok := blackListMap[iFace]
+		if ok {
+			return false
+		}
+		// look for unlisted Wireguard interfaces
+		wg, err := wgctrl.New()
+		if err != nil {
+			log.Debugf("trying to create a wgctrl client failed with: %v", err)
+		}
+		defer wg.Close()
+
+		_, err = wg.Device(iFace)
+		return err != nil
+	}
+}
+
+func (conn *Conn) reCreateAgent() error {
+	conn.mu.Lock()
+	defer conn.mu.Unlock()
+
+	failedTimeout := 6 * time.Second
+	var err error
+	conn.agent, err = ice.NewAgent(&ice.AgentConfig{
+		MulticastDNSMode: ice.MulticastDNSModeDisabled,
+		NetworkTypes:     []ice.NetworkType{ice.NetworkTypeUDP4},
+		Urls:             conn.config.StunTurn,
+		CandidateTypes:   []ice.CandidateType{ice.CandidateTypeHost, ice.CandidateTypeServerReflexive, ice.CandidateTypeRelay},
+		FailedTimeout:    &failedTimeout,
+		InterfaceFilter:  interfaceFilter(conn.config.InterfaceBlackList),
+		UDPMux:           conn.config.UDPMux,
+		UDPMuxSrflx:      conn.config.UDPMuxSrflx,
+	})
+	if err != nil {
+		return err
+	}
+
+	err = conn.agent.OnCandidate(conn.onICECandidate)
+	if err != nil {
+		return err
+	}
+
+	err = conn.agent.OnConnectionStateChange(conn.onICEConnectionStateChange)
+	if err != nil {
+		return err
+	}
+
+	err = conn.agent.OnSelectedCandidatePairChange(conn.onICESelectedCandidatePair)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// Open opens connection to the remote peer starting ICE candidate gathering process.
+// Blocks until connection has been closed or connection timeout.
+// ConnStatus will be set accordingly
+func (conn *Conn) Open() error {
+	log.Debugf("trying to connect to peer %s", conn.config.Key)
+
+	defer func() {
+		err := conn.cleanup()
+		if err != nil {
+			log.Errorf("error while cleaning up peer connection %s: %v", conn.config.Key, err)
+			return
+		}
+	}()
+
+	err := conn.reCreateAgent()
+	if err != nil {
+		return err
+	}
+
+	err = conn.sendOffer()
+	if err != nil {
+		return err
+	}
+
+	log.Debugf("connection offer sent to peer %s, waiting for the confirmation", conn.config.Key)
+
+	// Only continue once we got a connection confirmation from the remote peer.
+	// The connection timeout could have happened before a confirmation received from the remote.
+	// The connection could have also been closed externally (e.g. when we received an update from the management that peer shouldn't be connected)
+	var remoteCredentials IceCredentials
+	select {
+	case remoteCredentials = <-conn.remoteOffersCh:
+		// received confirmation from the remote peer -> ready to proceed
+		err = conn.sendAnswer()
+		if err != nil {
+			return err
+		}
+	case remoteCredentials = <-conn.remoteAnswerCh:
+	case <-time.After(conn.config.Timeout):
+		return NewConnectionTimeoutError(conn.config.Key, conn.config.Timeout)
+	case <-conn.closeCh:
+		// closed externally
+		return NewConnectionClosedError(conn.config.Key)
+	}
+
+	log.Debugf("received connection confirmation from peer %s", conn.config.Key)
+
+	// at this point we received offer/answer and we are ready to gather candidates
+	conn.mu.Lock()
+	conn.status = StatusConnecting
+	conn.ctx, conn.notifyDisconnected = context.WithCancel(context.Background())
+	defer conn.notifyDisconnected()
+	conn.mu.Unlock()
+
+	err = conn.agent.GatherCandidates()
+	if err != nil {
+		return err
+	}
+
+	// will block until connection succeeded
+	// but it won't release if ICE Agent went into Disconnected or Failed state,
+	// so we have to cancel it with the provided context once agent detected a broken connection
+	isControlling := conn.config.LocalKey > conn.config.Key
+	var remoteConn *ice.Conn
+	if isControlling {
+		remoteConn, err = conn.agent.Dial(conn.ctx, remoteCredentials.UFrag, remoteCredentials.Pwd)
+	} else {
+		remoteConn, err = conn.agent.Accept(conn.ctx, remoteCredentials.UFrag, remoteCredentials.Pwd)
+	}
+	if err != nil {
+		return err
+	}
+
+	// the connection has been established successfully so we are ready to start the proxy
+	err = conn.startProxy(remoteConn)
+	if err != nil {
+		return err
+	}
+
+	log.Infof("connected to peer %s [laddr <-> raddr] [%s <-> %s]", conn.config.Key, remoteConn.LocalAddr().String(), remoteConn.RemoteAddr().String())
+
+	// wait until connection disconnected or has been closed externally (upper layer, e.g. engine)
+	select {
+	case <-conn.closeCh:
+		// closed externally
+		return NewConnectionClosedError(conn.config.Key)
+	case <-conn.ctx.Done():
+		// disconnected from the remote peer
+		return NewConnectionDisconnectedError(conn.config.Key)
+	}
+}
+
+// startProxy starts proxying traffic from/to local Wireguard and sets connection status to StatusConnected
+func (conn *Conn) startProxy(remoteConn net.Conn) error {
+	conn.mu.Lock()
+	defer conn.mu.Unlock()
+
+	conn.proxy = proxy.NewWireguardProxy(conn.config.ProxyConfig)
+	err := conn.proxy.Start(remoteConn)
+	if err != nil {
+		return err
+	}
+	conn.status = StatusConnected
+
+	return nil
+}
+
+// cleanup closes all open resources and sets status to StatusDisconnected
+func (conn *Conn) cleanup() error {
+	log.Debugf("trying to cleanup %s", conn.config.Key)
+	conn.mu.Lock()
+	defer conn.mu.Unlock()
+
+	if conn.agent != nil {
+		err := conn.agent.Close()
+		if err != nil {
+			return err
+		}
+		conn.agent = nil
+	}
+
+	if conn.proxy != nil {
+		err := conn.proxy.Close()
+		if err != nil {
+			return err
+		}
+		conn.proxy = nil
+	}
+
+	if conn.notifyDisconnected != nil {
+		conn.notifyDisconnected()
+		conn.notifyDisconnected = nil
+	}
+
+	conn.status = StatusDisconnected
+
+	log.Debugf("cleaned up connection to peer %s", conn.config.Key)
+
+	return nil
+}
+
+// SetSignalOffer sets a handler function to be triggered by Conn when a new connection offer has to be signalled to the remote peer
+func (conn *Conn) SetSignalOffer(handler func(uFrag string, pwd string) error) {
+	conn.signalOffer = handler
+}
+
+// SetSignalAnswer sets a handler function to be triggered by Conn when a new connection answer has to be signalled to the remote peer
+func (conn *Conn) SetSignalAnswer(handler func(uFrag string, pwd string) error) {
+	conn.signalAnswer = handler
+}
+
+// SetSignalCandidate sets a handler function to be triggered by Conn when a new ICE local connection candidate has to be signalled to the remote peer
+func (conn *Conn) SetSignalCandidate(handler func(candidate ice.Candidate) error) {
+	conn.signalCandidate = handler
+}
+
+// onICECandidate is a callback attached to an ICE Agent to receive new local connection candidates
+// and then signals them to the remote peer
+func (conn *Conn) onICECandidate(candidate ice.Candidate) {
+	if candidate != nil {
+		// log.Debugf("discovered local candidate %s", candidate.String())
+		go func() {
+			err := conn.signalCandidate(candidate)
+			if err != nil {
+				log.Errorf("failed signaling candidate to the remote peer %s %s", conn.config.Key, err)
+			}
+		}()
+	}
+}
+
+func (conn *Conn) onICESelectedCandidatePair(c1 ice.Candidate, c2 ice.Candidate) {
+	log.Debugf("selected candidate pair [local <-> remote] -> [%s <-> %s], peer %s", c1.String(), c2.String(),
+		conn.config.Key)
+}
+
+// onICEConnectionStateChange registers callback of an ICE Agent to track connection state
+func (conn *Conn) onICEConnectionStateChange(state ice.ConnectionState) {
+	log.Debugf("peer %s ICE ConnectionState has changed to %s", conn.config.Key, state.String())
+	if state == ice.ConnectionStateFailed || state == ice.ConnectionStateDisconnected {
+		conn.notifyDisconnected()
+	}
+}
+
+func (conn *Conn) sendAnswer() error {
+	conn.mu.Lock()
+	defer conn.mu.Unlock()
+
+	localUFrag, localPwd, err := conn.agent.GetLocalUserCredentials()
+	if err != nil {
+		return err
+	}
+
+	log.Debugf("sending asnwer to %s", conn.config.Key)
+	err = conn.signalAnswer(localUFrag, localPwd)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// sendOffer prepares local user credentials and signals them to the remote peer
+func (conn *Conn) sendOffer() error {
+	conn.mu.Lock()
+	defer conn.mu.Unlock()
+
+	localUFrag, localPwd, err := conn.agent.GetLocalUserCredentials()
+	if err != nil {
+		return err
+	}
+	err = conn.signalOffer(localUFrag, localPwd)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// Close closes this peer Conn issuing a close event to the Conn closeCh
+func (conn *Conn) Close() error {
+	conn.mu.Lock()
+	defer conn.mu.Unlock()
+	select {
+	case conn.closeCh <- struct{}{}:
+		return nil
+	default:
+		// probably could happen when peer has been added and removed right after not even starting to connect
+		// todo further investigate
+		// this really happens due to unordered messages coming from management
+		// more importantly it causes inconsistency -> 2 Conn objects for the same peer
+		// e.g. this flow:
+		// update from management has peers: [1,2,3,4]
+		// engine creates a Conn for peers:  [1,2,3,4] and schedules Open in ~1sec
+		// before conn.Open() another update from management arrives with peers: [1,2,3]
+		// engine removes peer 4 and calls conn.Close() which does nothing (this default clause)
+		// before conn.Open() another update from management arrives with peers: [1,2,3,4,5]
+		// engine adds a new Conn for 4 and 5
+		// therefore peer 4 has 2 Conn objects
+		log.Warnf("closing not started coonection %s", conn.config.Key)
+		return NewConnectionAlreadyClosed(conn.config.Key)
+	}
+}
+
+// Status returns current status of the Conn
+func (conn *Conn) Status() ConnStatus {
+	conn.mu.Lock()
+	defer conn.mu.Unlock()
+	return conn.status
+}
+
+// OnRemoteOffer handles an offer from the remote peer and returns true if the message was accepted, false otherwise
+// doesn't block, discards the message if connection wasn't ready
+func (conn *Conn) OnRemoteOffer(remoteAuth IceCredentials) bool {
+	log.Debugf("OnRemoteOffer from peer %s on status %s", conn.config.Key, conn.status.String())
+
+	select {
+	case conn.remoteOffersCh <- remoteAuth:
+		return true
+	default:
+		log.Debugf("OnRemoteOffer skipping message from peer %s on status %s because is not ready", conn.config.Key, conn.status.String())
+		// connection might not be ready yet to receive so we ignore the message
+		return false
+	}
+}
+
+// OnRemoteAnswer handles an offer from the remote peer and returns true if the message was accepted, false otherwise
+// doesn't block, discards the message if connection wasn't ready
+func (conn *Conn) OnRemoteAnswer(remoteAuth IceCredentials) bool {
+	log.Debugf("OnRemoteAnswer from peer %s on status %s", conn.config.Key, conn.status.String())
+
+	select {
+	case conn.remoteAnswerCh <- remoteAuth:
+		return true
+	default:
+		// connection might not be ready yet to receive so we ignore the message
+		log.Debugf("OnRemoteAnswer skipping message from peer %s on status %s because is not ready", conn.config.Key, conn.status.String())
+		return false
+	}
+}
+
+// OnRemoteCandidate Handles ICE connection Candidate provided by the remote peer.
+func (conn *Conn) OnRemoteCandidate(candidate ice.Candidate) {
+	log.Debugf("OnRemoteCandidate from peer %s -> %s", conn.config.Key, candidate.String())
+	go func() {
+		conn.mu.Lock()
+		defer conn.mu.Unlock()
+
+		if conn.agent == nil {
+			return
+		}
+
+		err := conn.agent.AddRemoteCandidate(candidate)
+		if err != nil {
+			log.Errorf("error while handling remote candidate from peer %s", conn.config.Key)
+			return
+		}
+	}()
+}
+
+func (conn *Conn) GetKey() string {
+	return conn.config.Key
+}

client/internal/peer/conn_test.go

@@ -0,0 +1,144 @@
+package peer
+
+import (
+	"github.com/magiconair/properties/assert"
+	"github.com/pion/ice/v2"
+	"github.com/wiretrustee/wiretrustee/client/internal/proxy"
+	"sync"
+	"testing"
+	"time"
+)
+
+var connConf = ConnConfig{
+	Key:                "LLHf3Ma6z6mdLbriAJbqhX7+nM/B71lgw2+91q3LfhU=",
+	LocalKey:           "RRHf3Ma6z6mdLbriAJbqhX7+nM/B71lgw2+91q3LfhU=",
+	StunTurn:           []*ice.URL{},
+	InterfaceBlackList: nil,
+	Timeout:            time.Second,
+	ProxyConfig:        proxy.Config{},
+}
+
+func TestConn_GetKey(t *testing.T) {
+	conn, err := NewConn(connConf)
+	if err != nil {
+		return
+	}
+
+	got := conn.GetKey()
+
+	assert.Equal(t, got, connConf.Key, "they should be equal")
+}
+
+func TestConn_OnRemoteOffer(t *testing.T) {
+
+	conn, err := NewConn(connConf)
+	if err != nil {
+		return
+	}
+
+	wg := sync.WaitGroup{}
+	wg.Add(2)
+	go func() {
+		<-conn.remoteOffersCh
+		wg.Done()
+	}()
+
+	go func() {
+		for {
+			accepted := conn.OnRemoteOffer(IceCredentials{
+				UFrag: "test",
+				Pwd:   "test",
+			})
+			if accepted {
+				wg.Done()
+				return
+			}
+		}
+	}()
+
+	wg.Wait()
+}
+
+func TestConn_OnRemoteAnswer(t *testing.T) {
+
+	conn, err := NewConn(connConf)
+	if err != nil {
+		return
+	}
+
+	wg := sync.WaitGroup{}
+	wg.Add(2)
+	go func() {
+		<-conn.remoteAnswerCh
+		wg.Done()
+	}()
+
+	go func() {
+		for {
+			accepted := conn.OnRemoteAnswer(IceCredentials{
+				UFrag: "test",
+				Pwd:   "test",
+			})
+			if accepted {
+				wg.Done()
+				return
+			}
+		}
+	}()
+
+	wg.Wait()
+}
+func TestConn_Status(t *testing.T) {
+
+	conn, err := NewConn(connConf)
+	if err != nil {
+		return
+	}
+
+	tables := []struct {
+		name   string
+		status ConnStatus
+		want   ConnStatus
+	}{
+		{"StatusConnected", StatusConnected, StatusConnected},
+		{"StatusDisconnected", StatusDisconnected, StatusDisconnected},
+		{"StatusConnecting", StatusConnecting, StatusConnecting},
+	}
+
+	for _, table := range tables {
+		t.Run(table.name, func(t *testing.T) {
+			conn.status = table.status
+
+			got := conn.Status()
+			assert.Equal(t, got, table.want, "they should be equal")
+		})
+	}
+}
+
+func TestConn_Close(t *testing.T) {
+
+	conn, err := NewConn(connConf)
+	if err != nil {
+		return
+	}
+
+	wg := sync.WaitGroup{}
+	wg.Add(1)
+	go func() {
+		<-conn.closeCh
+		wg.Done()
+	}()
+
+	go func() {
+		for {
+			err := conn.Close()
+			if err != nil {
+				continue
+			} else {
+				return
+			}
+		}
+	}()
+
+	wg.Wait()
+}

client/internal/peer/error.go

@@ -0,0 +1,72 @@
+package peer
+
+import (
+	"fmt"
+	"time"
+)
+
+// ConnectionTimeoutError is an error indicating that a peer Conn has been timed out
+type ConnectionTimeoutError struct {
+	peer    string
+	timeout time.Duration
+}
+
+func (e *ConnectionTimeoutError) Error() string {
+	return fmt.Sprintf("connection to peer %s timed out after %s", e.peer, e.timeout.String())
+}
+
+// NewConnectionTimeoutError creates a new ConnectionTimeoutError error
+func NewConnectionTimeoutError(peer string, timeout time.Duration) error {
+	return &ConnectionTimeoutError{
+		peer:    peer,
+		timeout: timeout,
+	}
+}
+
+// ConnectionClosedError is an error indicating that a peer Conn has been forcefully closed
+type ConnectionClosedError struct {
+	peer string
+}
+
+func (e *ConnectionClosedError) Error() string {
+	return fmt.Sprintf("connection to peer %s has been closed", e.peer)
+}
+
+// NewConnectionClosedError creates a new ConnectionClosedError error
+func NewConnectionClosedError(peer string) error {
+	return &ConnectionClosedError{
+		peer: peer,
+	}
+}
+
+// ConnectionDisconnectedError is an error indicating that a peer Conn has ctx from the remote
+type ConnectionDisconnectedError struct {
+	peer string
+}
+
+func (e *ConnectionDisconnectedError) Error() string {
+	return fmt.Sprintf("disconnected from peer %s", e.peer)
+}
+
+// NewConnectionDisconnectedError creates a new ConnectionDisconnectedError error
+func NewConnectionDisconnectedError(peer string) error {
+	return &ConnectionDisconnectedError{
+		peer: peer,
+	}
+}
+
+// ConnectionAlreadyClosedError is an error indicating that a peer Conn has been already closed and the invocation of the Close() method has been performed over a closed connection
+type ConnectionAlreadyClosedError struct {
+	peer string
+}
+
+func (e *ConnectionAlreadyClosedError) Error() string {
+	return fmt.Sprintf("connection to peer %s has been already closed", e.peer)
+}
+
+// NewConnectionAlreadyClosed creates a new ConnectionAlreadyClosedError error
+func NewConnectionAlreadyClosed(peer string) error {
+	return &ConnectionAlreadyClosedError{
+		peer: peer,
+	}
+}

client/internal/peer/error_test.go

@@ -0,0 +1,27 @@
+package peer
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+	"time"
+)
+
+func TestNewConnectionClosedError(t *testing.T) {
+	err := NewConnectionClosedError("X")
+	assert.Equal(t, &ConnectionClosedError{peer: "X"}, err)
+}
+
+func TestNewConnectionDisconnectedError(t *testing.T) {
+	err := NewConnectionDisconnectedError("X")
+	assert.Equal(t, &ConnectionDisconnectedError{peer: "X"}, err)
+}
+
+func TestNewConnectionTimeoutErrorC(t *testing.T) {
+	err := NewConnectionTimeoutError("X", time.Second)
+	assert.Equal(t, &ConnectionTimeoutError{peer: "X", timeout: time.Second}, err)
+}
+
+func TestNewConnectionAlreadyClosed(t *testing.T) {
+	err := NewConnectionAlreadyClosed("X")
+	assert.Equal(t, &ConnectionAlreadyClosedError{peer: "X"}, err)
+}

client/internal/peer/status.go

@@ -0,0 +1,25 @@
+package peer
+
+import log "github.com/sirupsen/logrus"
+
+type ConnStatus int
+
+func (s ConnStatus) String() string {
+	switch s {
+	case StatusConnecting:
+		return "StatusConnecting"
+	case StatusConnected:
+		return "StatusConnected"
+	case StatusDisconnected:
+		return "StatusDisconnected"
+	default:
+		log.Errorf("unknown status: %d", s)
+		return "INVALID_PEER_CONNECTION_STATUS"
+	}
+}
+
+const (
+	StatusConnected = iota
+	StatusConnecting
+	StatusDisconnected
+)

client/internal/peer/status_test.go

@@ -0,0 +1,27 @@
+package peer
+
+import (
+	"github.com/magiconair/properties/assert"
+	"testing"
+)
+
+func TestConnStatus_String(t *testing.T) {
+
+	tables := []struct {
+		name   string
+		status ConnStatus
+		want   string
+	}{
+		{"StatusConnected", StatusConnected, "StatusConnected"},
+		{"StatusDisconnected", StatusDisconnected, "StatusDisconnected"},
+		{"StatusConnecting", StatusConnecting, "StatusConnecting"},
+	}
+
+	for _, table := range tables {
+		t.Run(table.name, func(t *testing.T) {
+			got := table.status.String()
+			assert.Equal(t, got, table.want, "they should be equal")
+		})
+	}
+
+}

client/internal/proxy/dummy.go

@@ -0,0 +1,68 @@
+package proxy
+
+import (
+	"context"
+	log "github.com/sirupsen/logrus"
+	"net"
+	"time"
+)
+
+// DummyProxy just sends pings to the RemoteKey peer and reads responses
+type DummyProxy struct {
+	conn   net.Conn
+	remote string
+	ctx    context.Context
+	cancel context.CancelFunc
+}
+
+func NewDummyProxy(remote string) *DummyProxy {
+	p := &DummyProxy{remote: remote}
+	p.ctx, p.cancel = context.WithCancel(context.Background())
+	return p
+}
+
+func (p *DummyProxy) Close() error {
+	p.cancel()
+	return nil
+}
+
+func (p *DummyProxy) Start(remoteConn net.Conn) error {
+	p.conn = remoteConn
+	go func() {
+		buf := make([]byte, 1500)
+		for {
+			select {
+			case <-p.ctx.Done():
+				return
+			default:
+				_, err := p.conn.Read(buf)
+				if err != nil {
+					log.Errorf("error while reading RemoteKey %s proxy %v", p.remote, err)
+					return
+				}
+				//log.Debugf("received %s from %s", string(buf[:n]), p.remote)
+			}
+
+		}
+	}()
+
+	go func() {
+		for {
+			select {
+			case <-p.ctx.Done():
+				return
+			default:
+				_, err := p.conn.Write([]byte("hello"))
+				//log.Debugf("sent ping to %s", p.remote)
+				if err != nil {
+					log.Errorf("error while writing to RemoteKey %s proxy %v", p.remote, err)
+					return
+				}
+				time.Sleep(5 * time.Second)
+			}
+		}
+
+	}()
+
+	return nil
+}

client/internal/proxy/proxy.go

@@ -0,0 +1,25 @@
+package proxy
+
+import (
+	"github.com/wiretrustee/wiretrustee/iface"
+	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
+	"io"
+	"net"
+	"time"
+)
+
+const DefaultWgKeepAlive = 25 * time.Second
+
+type Config struct {
+	WgListenAddr string
+	RemoteKey    string
+	WgInterface  iface.WGIface
+	AllowedIps   string
+	PreSharedKey *wgtypes.Key
+}
+
+type Proxy interface {
+	io.Closer
+	// Start creates a local remoteConn and starts proxying data from/to remoteConn
+	Start(remoteConn net.Conn) error
+}

client/internal/proxy/wireguard.go

@@ -0,0 +1,124 @@
+package proxy
+
+import (
+	"context"
+	log "github.com/sirupsen/logrus"
+	"net"
+)
+
+// WireguardProxy proxies
+type WireguardProxy struct {
+	ctx    context.Context
+	cancel context.CancelFunc
+
+	config Config
+
+	remoteConn net.Conn
+	localConn  net.Conn
+}
+
+func NewWireguardProxy(config Config) *WireguardProxy {
+	p := &WireguardProxy{config: config}
+	p.ctx, p.cancel = context.WithCancel(context.Background())
+	return p
+}
+
+func (p *WireguardProxy) updateEndpoint() error {
+	udpAddr, err := net.ResolveUDPAddr(p.localConn.LocalAddr().Network(), p.localConn.LocalAddr().String())
+	if err != nil {
+		return err
+	}
+	// add local proxy connection as a Wireguard peer
+	err = p.config.WgInterface.UpdatePeer(p.config.RemoteKey, p.config.AllowedIps, DefaultWgKeepAlive,
+		udpAddr, p.config.PreSharedKey)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (p *WireguardProxy) Start(remoteConn net.Conn) error {
+	p.remoteConn = remoteConn
+
+	var err error
+	p.localConn, err = net.Dial("udp", p.config.WgListenAddr)
+	if err != nil {
+		log.Errorf("failed dialing to local Wireguard port %s", err)
+		return err
+	}
+
+	err = p.updateEndpoint()
+	if err != nil {
+		log.Errorf("error while updating Wireguard peer endpoint [%s] %v", p.config.RemoteKey, err)
+		return err
+	}
+
+	go p.proxyToRemote()
+	go p.proxyToLocal()
+
+	return nil
+}
+
+func (p *WireguardProxy) Close() error {
+	p.cancel()
+	if c := p.localConn; c != nil {
+		err := p.localConn.Close()
+		if err != nil {
+			return err
+		}
+	}
+	err := p.config.WgInterface.RemovePeer(p.config.RemoteKey)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// proxyToRemote proxies everything from Wireguard to the RemoteKey peer
+// blocks
+func (p *WireguardProxy) proxyToRemote() {
+
+	buf := make([]byte, 1500)
+	for {
+		select {
+		case <-p.ctx.Done():
+			log.Debugf("stopped proxying to remote peer %s due to closed connection", p.config.RemoteKey)
+			return
+		default:
+			n, err := p.localConn.Read(buf)
+			if err != nil {
+				continue
+			}
+
+			_, err = p.remoteConn.Write(buf[:n])
+			if err != nil {
+				continue
+			}
+		}
+	}
+}
+
+// proxyToLocal proxies everything from the RemoteKey peer to local Wireguard
+// blocks
+func (p *WireguardProxy) proxyToLocal() {
+
+	buf := make([]byte, 1500)
+	for {
+		select {
+		case <-p.ctx.Done():
+			log.Debugf("stopped proxying from remote peer %s due to closed connection", p.config.RemoteKey)
+			return
+		default:
+			n, err := p.remoteConn.Read(buf)
+			if err != nil {
+				continue
+			}
+
+			_, err = p.localConn.Write(buf[:n])
+			if err != nil {
+				continue
+			}
+		}
+	}
+}

client/internal/wgproxy.go

@@ -1,131 +0,0 @@
-package internal
-
-import (
-	ice "github.com/pion/ice/v2"
-	log "github.com/sirupsen/logrus"
-	"github.com/wiretrustee/wiretrustee/iface"
-	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
-	"net"
-)
-
-// WgProxy an instance of an instance of the Connection Wireguard Proxy
-type WgProxy struct {
-	iface        string
-	remoteKey    string
-	allowedIps   string
-	wgAddr       string
-	close        chan struct{}
-	wgConn       net.Conn
-	preSharedKey *wgtypes.Key
-}
-
-// NewWgProxy creates a new Connection Wireguard Proxy
-func NewWgProxy(iface string, remoteKey string, allowedIps string, wgAddr string, preSharedKey *wgtypes.Key) *WgProxy {
-	return &WgProxy{
-		iface:        iface,
-		remoteKey:    remoteKey,
-		allowedIps:   allowedIps,
-		wgAddr:       wgAddr,
-		close:        make(chan struct{}),
-		preSharedKey: preSharedKey,
-	}
-}
-
-// Close closes the proxy
-func (p *WgProxy) Close() error {
-
-	close(p.close)
-	if c := p.wgConn; c != nil {
-		err := p.wgConn.Close()
-		if err != nil {
-			return err
-		}
-	}
-	err := iface.RemovePeer(p.iface, p.remoteKey)
-	if err != nil {
-		return err
-	}
-
-	return nil
-}
-
-// StartLocal configure the interface with a peer using a direct IP:Port endpoint to the remote host
-func (p *WgProxy) StartLocal(host string) error {
-	err := iface.UpdatePeer(p.iface, p.remoteKey, p.allowedIps, DefaultWgKeepAlive, host, p.preSharedKey)
-	if err != nil {
-		log.Errorf("error while configuring Wireguard peer [%s] %s", p.remoteKey, err.Error())
-		return err
-	}
-	return nil
-}
-
-// Start starts a new proxy using the ICE connection
-func (p *WgProxy) Start(remoteConn *ice.Conn) error {
-
-	wgConn, err := net.Dial("udp", p.wgAddr)
-	if err != nil {
-		log.Fatalf("failed dialing to local Wireguard port %s", err)
-		return err
-	}
-	p.wgConn = wgConn
-	// add local proxy connection as a Wireguard peer
-	err = iface.UpdatePeer(p.iface, p.remoteKey, p.allowedIps, DefaultWgKeepAlive,
-		wgConn.LocalAddr().String(), p.preSharedKey)
-	if err != nil {
-		log.Errorf("error while configuring Wireguard peer [%s] %s", p.remoteKey, err.Error())
-		return err
-	}
-
-	go func() { p.proxyToRemotePeer(remoteConn) }()
-	go func() { p.proxyToLocalWireguard(remoteConn) }()
-
-	return err
-}
-
-// proxyToRemotePeer proxies everything from Wireguard to the remote peer
-// blocks
-func (p *WgProxy) proxyToRemotePeer(remoteConn *ice.Conn) {
-
-	buf := make([]byte, 1500)
-	for {
-		select {
-		case <-p.close:
-			log.Debugf("stopped proxying from remote peer %s due to closed connection", p.remoteKey)
-			return
-		default:
-			n, err := p.wgConn.Read(buf)
-			if err != nil {
-				continue
-			}
-
-			_, err = remoteConn.Write(buf[:n])
-			if err != nil {
-				continue
-			}
-		}
-	}
-}
-
-// proxyToLocalWireguard proxies everything from the remote peer to local Wireguard
-// blocks
-func (p *WgProxy) proxyToLocalWireguard(remoteConn *ice.Conn) {
-
-	buf := make([]byte, 1500)
-	for {
-		select {
-		case <-p.close:
-			log.Debugf("stopped proxying from remote peer %s due to closed connection", p.remoteKey)
-			return
-		default:
-			n, err := remoteConn.Read(buf)
-			if err != nil {
-				continue
-			}
-
-			_, err = p.wgConn.Write(buf[:n])
-			if err != nil {
-				continue
-			}
-		}
-	}
-}

client/main.go

@@ -1,15 +1,12 @@
 package main
 
 import (
-	"github.com/wiretrustee/wiretrustee/client/cmd"
 	"os"
+
+	"github.com/wiretrustee/wiretrustee/client/cmd"
 )
 
-var version = "development"
-
 func main() {
-
-	cmd.Version = version
 	if err := cmd.Execute(); err != nil {
 		os.Exit(1)
 	}

client/resources.rc

@@ -5,5 +5,5 @@
 #define STRINGIZE(x) #x
 #define EXPAND(x) STRINGIZE(x)
 CREATEPROCESS_MANIFEST_RESOURCE_ID RT_MANIFEST manifest.xml
-wintun.dll RCDATA wintun.dll
+7 ICON ui/wiretrustee.ico
-
+wireguard.dll RCDATA wireguard.dll

client/system/info.go

@@ -1,14 +1,23 @@
 package system
 
+// this is the wiretrustee version
+// will be replaced with the release version when using goreleaser
+var version = "development"
+
 //Info is an object that contains machine information
 // Most of the code is taken from https://github.com/matishsiao/goInfo
 type Info struct {
-	GoOS      string
+	GoOS               string
-	Kernel    string
+	Kernel             string
-	Core      string
+	Core               string
-	Platform  string
+	Platform           string
-	OS        string
+	OS                 string
-	OSVersion string
+	OSVersion          string
-	Hostname  string
+	Hostname           string
-	CPUs      int
+	CPUs               int
+	WiretrusteeVersion string
+}
+
+func WiretrusteeVersion() string {
+	return version
 }

client/system/info_darwin.go

@@ -21,6 +21,7 @@ func GetInfo() *Info {
 	osInfo := strings.Split(osStr, " ")
 	gio := &Info{Kernel: osInfo[0], OSVersion: osInfo[1], Core: osInfo[1], Platform: osInfo[2], OS: osInfo[0], GoOS: runtime.GOOS, CPUs: runtime.NumCPU()}
 	gio.Hostname, _ = os.Hostname()
+	gio.WiretrusteeVersion = WiretrusteeVersion()
 	return gio
 }
 

client/system/info_freebsd.go

@@ -21,6 +21,7 @@ func GetInfo() *Info {
 	osInfo := strings.Split(osStr, " ")
 	gio := &Info{Kernel: osInfo[0], Core: osInfo[1], Platform: runtime.GOARCH, OS: osInfo[2], GoOS: runtime.GOOS, CPUs: runtime.NumCPU()}
 	gio.Hostname, _ = os.Hostname()
+	gio.WiretrusteeVersion = WiretrusteeVersion()
 	return gio
 }
 

client/system/info_linux.go

@@ -44,6 +44,8 @@ func GetInfo() *Info {
 	}
 	gio := &Info{Kernel: osInfo[0], Core: osInfo[1], Platform: osInfo[2], OS: osName, OSVersion: osVer, GoOS: runtime.GOOS, CPUs: runtime.NumCPU()}
 	gio.Hostname, _ = os.Hostname()
+	gio.WiretrusteeVersion = WiretrusteeVersion()
+
 	return gio
 }
 

client/system/info_test.go

@@ -0,0 +1,13 @@
+package system
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_LocalVersion(t *testing.T) {
+	got := GetInfo()
+	want := "development"
+	assert.Equal(t, want, got.WiretrusteeVersion)
+}

client/system/info_windows.go

@@ -31,5 +31,7 @@ func GetInfo() *Info {
 	}
 	gio := &Info{Kernel: "windows", OSVersion: ver, Core: ver, Platform: "unknown", OS: "windows", GoOS: runtime.GOOS, CPUs: runtime.NumCPU()}
 	gio.Hostname, _ = os.Hostname()
+	gio.WiretrusteeVersion = WiretrusteeVersion()
+
 	return gio
 }

client/testdata/management.json

@@ -1,37 +1,37 @@
 {
-    "Stuns": [
+  "Stuns": [
-        {
+    {
-            "Proto": "udp",
+      "Proto": "udp",
-            "URI": "stun:stun.wiretrustee.com:3468",
+      "URI": "stun:stun.wiretrustee.com:3468",
-            "Username": "",
+      "Username": "",
-            "Password": null
+      "Password": null
-        }
-    ],
-    "TURNConfig": {
-        "Turns": [
-            {
-                "Proto": "udp",
-                "URI": "turn:stun.wiretrustee.com:3468",
-                "Username": "some_user",
-                "Password": "c29tZV9wYXNzd29yZA=="
-            }
-        ],
-        "CredentialsTTL": "1h",
-        "Secret": "c29tZV9wYXNzd29yZA==",
-        "TimeBasedCredentials": true
-    },
-    "Signal": {
-        "Proto": "http",
-        "URI": "signal.wiretrustee.com:10000",
-        "Username": "",
-        "Password": null
-    },
-    "DataDir": "",
-    "HttpConfig": {
-        "LetsEncryptDomain": "<PASTE YOUR LET'S ENCRYPT DOMAIN HERE>",
-        "Address": "0.0.0.0:33071",
-        "AuthIssuer": "<PASTE YOUR AUTH0 ISSUER HERE>,",
-        "AuthAudience": "<PASTE YOUR AUTH0 AUDIENCE HERE>",
-        "AuthKeysLocation": "<PASTE YOUR AUTH0 PUBLIC JWT KEYS LOCATION HERE>"
     }
+  ],
+  "TURNConfig": {
+    "Turns": [
+      {
+        "Proto": "udp",
+        "URI": "turn:stun.wiretrustee.com:3468",
+        "Username": "some_user",
+        "Password": "c29tZV9wYXNzd29yZA=="
+      }
+    ],
+    "CredentialsTTL": "1h",
+    "Secret": "c29tZV9wYXNzd29yZA==",
+    "TimeBasedCredentials": true
+  },
+  "Signal": {
+    "Proto": "http",
+    "URI": "signal.wiretrustee.com:10000",
+    "Username": "",
+    "Password": null
+  },
+  "DataDir": "",
+  "HttpConfig": {
+    "LetsEncryptDomain": "<PASTE YOUR LET'S ENCRYPT DOMAIN HERE>",
+    "Address": "0.0.0.0:33071",
+    "AuthIssuer": "<PASTE YOUR AUTH0 ISSUER HERE>,",
+    "AuthAudience": "<PASTE YOUR AUTH0 AUDIENCE HERE>",
+    "AuthKeysLocation": "<PASTE YOUR AUTH0 PUBLIC JWT KEYS LOCATION HERE>"
+  }
 }

client/testdata/store.json

@@ -11,6 +11,7 @@
                     "ExpiresAt": "2321-09-18T20:46:20.005936822+02:00",
                     "Revoked": false,
                     "UsedTimes": 0
+
                 }
             },
             "Network": {
@@ -21,7 +22,17 @@
                 },
                 "Dns": null
             },
-            "Peers": {}
+            "Peers": {},
+            "Users": {
+                "edafee4e-63fb-11ec-90d6-0242ac120003": {
+                    "Id": "edafee4e-63fb-11ec-90d6-0242ac120003",
+                    "Role": "admin"
+                },
+                "f4f6d672-63fb-11ec-90d6-0242ac120003": {
+                    "Id": "f4f6d672-63fb-11ec-90d6-0242ac120003",
+                    "Role": "user"
+                }
+            }
         }
     }
 }

client/wireguard_nt.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+
+ldir=$PWD
+tmp_dir_path=$ldir/.distfiles
+winnt=wireguard-nt.zip
+download_file_path=$tmp_dir_path/$winnt
+download_url=https://download.wireguard.com/wireguard-nt/wireguard-nt-0.10.1.zip
+download_sha=772c0b1463d8d2212716f43f06f4594d880dea4f735165bd68e388fc41b81605
+
+function resources_windows(){
+  cmd=$1
+  arch=$2
+  out=$3
+  docker run -i --rm -v $PWD:$PWD -w $PWD mstorsjo/llvm-mingw:latest $cmd -O coff -c 65001 -I $tmp_dir_path/wireguard-nt/bin/$arch -i resources.rc -o $out
+}
+
+mkdir -p $tmp_dir_path
+curl -L#o $download_file_path.unverified $download_url
+echo "$download_sha  $download_file_path.unverified" | sha256sum -c
+mv $download_file_path.unverified $download_file_path
+
+mkdir -p .deps
+unzip $download_file_path -d $tmp_dir_path
+
+resources_windows i686-w64-mingw32-windres x86 resources_windows_386.syso
+resources_windows aarch64-w64-mingw32-windres arm64 resources_windows_arm64.syso
+resources_windows x86_64-w64-mingw32-windres amd64 resources_windows_amd64.syso

go.mod

@@ -17,7 +17,7 @@ require (
 	github.com/spf13/cobra v1.3.0
 	github.com/spf13/pflag v1.0.5
 	github.com/vishvananda/netlink v1.1.0
-	golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3
+	golang.org/x/crypto v0.0.0-20220131195533-30dcbda58838
 	golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e
 	golang.zx2c4.com/wireguard v0.0.0-20211209221555-9c9e7e272434
 	golang.zx2c4.com/wireguard/wgctrl v0.0.0-20211215182854-7a385b3431de
@@ -27,10 +27,15 @@ require (
 	gopkg.in/natefinch/lumberjack.v2 v2.0.0
 )
 
-require github.com/rs/xid v1.3.0
+require (
+	github.com/magiconair/properties v1.8.5
+	github.com/rs/xid v1.3.0
+	github.com/stretchr/testify v1.7.0
+)
 
 require (
 	github.com/BurntSushi/toml v0.4.1 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/fsnotify/fsnotify v1.5.1 // indirect
 	github.com/google/go-cmp v0.5.6 // indirect
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
@@ -39,17 +44,18 @@ require (
 	github.com/mdlayher/netlink v1.4.2 // indirect
 	github.com/mdlayher/socket v0.0.0-20211102153432-57e3fa563ecb // indirect
 	github.com/nxadm/tail v1.4.8 // indirect
-	github.com/pion/dtls/v2 v2.0.12 // indirect
+	github.com/pion/dtls/v2 v2.1.2 // indirect
 	github.com/pion/logging v0.2.2 // indirect
 	github.com/pion/mdns v0.0.5 // indirect
 	github.com/pion/randutil v0.1.0 // indirect
 	github.com/pion/stun v0.3.5 // indirect
-	github.com/pion/transport v0.12.3 // indirect
+	github.com/pion/transport v0.13.0 // indirect
-	github.com/pion/turn/v2 v2.0.5 // indirect
+	github.com/pion/turn/v2 v2.0.7 // indirect
 	github.com/pion/udp v0.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df // indirect
 	golang.org/x/mod v0.5.1 // indirect
-	golang.org/x/net v0.0.0-20211208012354-db4efeb81f4b // indirect
+	golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd // indirect
 	golang.org/x/text v0.3.8-0.20211105212822-18b340fc7af2 // indirect
 	golang.org/x/tools v0.1.8 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
@@ -58,5 +64,8 @@ require (
 	google.golang.org/genproto v0.0.0-20211208223120-3a66f561d7aa // indirect
 	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 	honnef.co/go/tools v0.2.2 // indirect
 )
+
+replace github.com/pion/ice/v2 => github.com/wiretrustee/ice/v2 v2.1.21-0.20220218121004-dc81faead4bb

go.sum

@@ -287,6 +287,7 @@ github.com/leodido/go-urn v1.1.0/go.mod h1:+cyI34gQWZcE1eQU7NVgKkkzdXDQHr1dBMtdA
 github.com/lxn/walk v0.0.0-20210112085537-c389da54e794/go.mod h1:E23UucZGqpuUANJooIbHWCufXvOcT6E7Stq81gU+CSQ=
 github.com/lxn/win v0.0.0-20210218163916-a377121e959e/go.mod h1:KxxjdtRkfNoYDCUP5ryK7XJJNTnpC8atvtmTheChOtk=
 github.com/lyft/protoc-gen-star v0.5.3/go.mod h1:V0xaHgaf5oCCqmcxYcWiDfTiKsZsRc87/1qhoTACD8w=
+github.com/magiconair/properties v1.8.5 h1:b6kJs+EmPFMYGkow9GiUyCyOvIwYetYJ3fSaWak/Gls=
 github.com/magiconair/properties v1.8.5/go.mod h1:y3VJvCyxH9uVvJTWEGAELF3aiYNyPKd5NZ3oSwXrF60=
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
 github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
@@ -355,10 +356,8 @@ github.com/onsi/gomega v1.17.0/go.mod h1:HnhC7FXeEQY45zxNK3PPoIUhzk/80Xly9PcubAl
 github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=
 github.com/pascaldekloe/goe v0.1.0/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=
 github.com/pelletier/go-toml v1.9.4/go.mod h1:u1nR/EPcESfeI/szUZKdtJ0xRNbUoANCkoOuaOx1Y+c=
-github.com/pion/dtls/v2 v2.0.12 h1:QMSvNht7FM/XDXij3Ic90SCbl5yL7kppeI4ghfF4in8=
+github.com/pion/dtls/v2 v2.1.2 h1:22Q1Jk9L++Yo7BIf9130MonNPfPVb+YgdYLeyQotuAA=
-github.com/pion/dtls/v2 v2.0.12/go.mod h1:5Pe3QJI0Ajsx+uCfxREeewGFlKYBzLrXe9ku7Y0oRXM=
+github.com/pion/dtls/v2 v2.1.2/go.mod h1:o6+WvyLDAlXF7YiPB/RlskRoeK+/JtuaZa5emwQcWus=
-github.com/pion/ice/v2 v2.1.17 h1:z7aBWgs85AEeRgtj0bHnCrShzaGnZ/RS4pMoRmbYxtY=
-github.com/pion/ice/v2 v2.1.17/go.mod h1:M0MJ/tBR3IyDcaJv49hAiHEzaVBqWCV/MuWqIffBsrw=
 github.com/pion/logging v0.2.2 h1:M9+AIj/+pxNsDfAT64+MAVgJO0rsyLnoJKCqf//DoeY=
 github.com/pion/logging v0.2.2/go.mod h1:k0/tDVsRCX2Mb2ZEmTqNa7CWsQPc+YYCB7Q+5pahoms=
 github.com/pion/mdns v0.0.5 h1:Q2oj/JB3NqfzY9xGZ1fPzZzK7sDSD8rZPOvcIQ10BCw=
@@ -367,12 +366,11 @@ github.com/pion/randutil v0.1.0 h1:CFG1UdESneORglEsnimhUjf33Rwjubwj6xfiOXBa3mA=
 github.com/pion/randutil v0.1.0/go.mod h1:XcJrSMMbbMRhASFVOlj/5hQial/Y8oH/HVo7TBZq+j8=
 github.com/pion/stun v0.3.5 h1:uLUCBCkQby4S1cf6CGuR9QrVOKcvUwFeemaC865QHDg=
 github.com/pion/stun v0.3.5/go.mod h1:gDMim+47EeEtfWogA37n6qXZS88L5V6LqFcf+DZA2UA=
-github.com/pion/transport v0.10.1/go.mod h1:PBis1stIILMiis0PewDw91WJeLJkyIMcEk+DwKOzf4A=
 github.com/pion/transport v0.12.2/go.mod h1:N3+vZQD9HlDP5GWkZ85LohxNsDcNgofQmyL6ojX5d8Q=
-github.com/pion/transport v0.12.3 h1:vdBfvfU/0Wq8kd2yhUMSDB/x+O4Z9MYVl2fJ5BT4JZw=
+github.com/pion/transport v0.13.0 h1:KWTA5ZrQogizzYwPEciGtHPLwpAjE91FgXnyu+Hv2uY=
-github.com/pion/transport v0.12.3/go.mod h1:OViWW9SP2peE/HbwBvARicmAVnesphkNkCVZIWJ6q9A=
+github.com/pion/transport v0.13.0/go.mod h1:yxm9uXpK9bpBBWkITk13cLo1y5/ur5VQpG22ny6EP7g=
-github.com/pion/turn/v2 v2.0.5 h1:iwMHqDfPEDEOFzwWKT56eFmh6DYC6o/+xnLAEzgISbA=
+github.com/pion/turn/v2 v2.0.7 h1:SZhc00WDovK6czaN1RSiHqbwANtIO6wfZQsU0m0KNE8=
-github.com/pion/turn/v2 v2.0.5/go.mod h1:APg43CFyt/14Uy7heYUOGWdkem/Wu4PhCO/bjyrTqMw=
+github.com/pion/turn/v2 v2.0.7/go.mod h1:+y7xl719J8bAEVpSXBXvTxStjJv3hbz9YFflvkpcGPw=
 github.com/pion/udp v0.1.1 h1:8UAPvyqmsxK8oOjloDk4wUt63TzFe9WEJkg5lChlj7o=
 github.com/pion/udp v0.1.1/go.mod h1:6AFo+CMdKQm7UiA0eUPA8/eVCTx8jBIITLZHc9DWX5M=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@@ -435,6 +433,8 @@ github.com/vishvananda/netlink v1.1.0 h1:1iyaYNBLmP6L0220aDnYQpo1QEV4t4hJ+xEEhhJ
 github.com/vishvananda/netlink v1.1.0/go.mod h1:cTgwzPIzzgDAYoQrMm0EdrjRUBkTqKYppBueQtXaqoE=
 github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df h1:OviZH7qLw/7ZovXvuNyL3XQl8UFofeikI1NW1Gypu7k=
 github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df/go.mod h1:JP3t17pCcGlemwknint6hfoeCVQrEMVwxRLRjXpq+BU=
+github.com/wiretrustee/ice/v2 v2.1.21-0.20220218121004-dc81faead4bb h1:CU1/+CEeCPvYXgfAyqTJXSQSf6hW3wsWM6Dfz6HkHEQ=
+github.com/wiretrustee/ice/v2 v2.1.21-0.20220218121004-dc81faead4bb/go.mod h1:XT1Nrb4OxbVFPffbQMbq4PaeEkpRLVzdphh3fjrw7DY=
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
@@ -468,10 +468,9 @@ golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPh
 golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.0.0-20211108221036-ceb1ce70b4fa/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
-golang.org/x/crypto v0.0.0-20211117183948-ae814b36b871/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/crypto v0.0.0-20211202192323-5770296d904e/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
-golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3 h1:0es+/5331RGQPcXlMfP+WrnIIS6dNnNRe0WB02W0F4M=
+golang.org/x/crypto v0.0.0-20220131195533-30dcbda58838 h1:71vQrMauZZhcTVK6KdYM+rklehEEwb3E+ZhaE5jrPrE=
-golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/crypto v0.0.0-20220131195533-30dcbda58838/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -568,8 +567,9 @@ golang.org/x/net v0.0.0-20211020060615-d418f374d309/go.mod h1:9nx3DQGgdP8bBQD5qx
 golang.org/x/net v0.0.0-20211111083644-e5c967477495/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211201190559-0a0e4e1bb54c/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.0.0-20211208012354-db4efeb81f4b h1:MWaHNqZy3KTpuTMAGvv+Kw+ylsEpmyJZizz1dqxnu28=
 golang.org/x/net v0.0.0-20211208012354-db4efeb81f4b/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd h1:O7DYs+zxREGLKzKoMQrtrEacpb0ZVXA5rIwylE2Xchk=
+golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -692,6 +692,7 @@ golang.org/x/sys v0.0.0-20211214234402-4825e8c3871d/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e h1:fLOSk5Q00efkSvAm+4xcoXD+RRmLmmulPn5I3Y9F2EM=
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

iface/configuration.go

@@ -0,0 +1,133 @@
+package iface
+
+import (
+	"fmt"
+	log "github.com/sirupsen/logrus"
+	"golang.zx2c4.com/wireguard/wgctrl"
+	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
+	"net"
+	"time"
+)
+
+// configureDevice configures the wireguard device
+func (w *WGIface) configureDevice(config wgtypes.Config) error {
+	wg, err := wgctrl.New()
+	if err != nil {
+		return err
+	}
+	defer wg.Close()
+
+	// validate if device with name exists
+	_, err = wg.Device(w.Name)
+	if err != nil {
+		return err
+	}
+	log.Debugf("got Wireguard device %s", w.Name)
+
+	return wg.ConfigureDevice(w.Name, config)
+}
+
+// Configure configures a Wireguard interface
+// The interface must exist before calling this method (e.g. call interface.Create() before)
+func (w *WGIface) Configure(privateKey string, port int) error {
+
+	log.Debugf("configuring Wireguard interface %s", w.Name)
+
+	log.Debugf("adding Wireguard private key")
+	key, err := wgtypes.ParseKey(privateKey)
+	if err != nil {
+		return err
+	}
+	fwmark := 0
+	config := wgtypes.Config{
+		PrivateKey:   &key,
+		ReplacePeers: true,
+		FirewallMark: &fwmark,
+		ListenPort:   &port,
+	}
+
+	err = w.configureDevice(config)
+	if err != nil {
+		return fmt.Errorf("received error \"%v\" while configuring interface %s with port %d", err, w.Name, port)
+	}
+	return nil
+}
+
+// GetListenPort returns the listening port of the Wireguard endpoint
+func (w *WGIface) GetListenPort() (*int, error) {
+	log.Debugf("getting Wireguard listen port of interface %s", w.Name)
+
+	//discover Wireguard current configuration
+	wg, err := wgctrl.New()
+	if err != nil {
+		return nil, err
+	}
+	defer wg.Close()
+
+	d, err := wg.Device(w.Name)
+	if err != nil {
+		return nil, err
+	}
+	log.Debugf("got Wireguard device listen port %s, %d", w.Name, d.ListenPort)
+
+	return &d.ListenPort, nil
+}
+
+// UpdatePeer updates existing Wireguard Peer or creates a new one if doesn't exist
+// Endpoint is optional
+func (w *WGIface) UpdatePeer(peerKey string, allowedIps string, keepAlive time.Duration, endpoint *net.UDPAddr, preSharedKey *wgtypes.Key) error {
+
+	log.Debugf("updating interface %s peer %s: endpoint %s ", w.Name, peerKey, endpoint)
+
+	//parse allowed ips
+	_, ipNet, err := net.ParseCIDR(allowedIps)
+	if err != nil {
+		return err
+	}
+
+	peerKeyParsed, err := wgtypes.ParseKey(peerKey)
+	if err != nil {
+		return err
+	}
+	peer := wgtypes.PeerConfig{
+		PublicKey:                   peerKeyParsed,
+		ReplaceAllowedIPs:           true,
+		AllowedIPs:                  []net.IPNet{*ipNet},
+		PersistentKeepaliveInterval: &keepAlive,
+		PresharedKey:                preSharedKey,
+		Endpoint:                    endpoint,
+	}
+
+	config := wgtypes.Config{
+		Peers: []wgtypes.PeerConfig{peer},
+	}
+	err = w.configureDevice(config)
+	if err != nil {
+		return fmt.Errorf("received error \"%v\" while updating peer on interface %s with settings: allowed ips %s, endpoint %s", err, w.Name, allowedIps, endpoint.String())
+	}
+	return nil
+}
+
+// RemovePeer removes a Wireguard Peer from the interface iface
+func (w *WGIface) RemovePeer(peerKey string) error {
+	log.Debugf("Removing peer %s from interface %s ", peerKey, w.Name)
+
+	peerKeyParsed, err := wgtypes.ParseKey(peerKey)
+	if err != nil {
+		return err
+	}
+
+	peer := wgtypes.PeerConfig{
+		PublicKey: peerKeyParsed,
+		Remove:    true,
+	}
+
+	config := wgtypes.Config{
+		Peers: []wgtypes.PeerConfig{peer},
+	}
+	err = w.configureDevice(config)
+	if err != nil {
+		return fmt.Errorf("received error \"%v\" while removing peer %s from interface %s", err, peerKey, w.Name)
+	}
+	return nil
+}

iface/iface.go

@@ -1,80 +1,51 @@
 package iface
 
 import (
-	log "github.com/sirupsen/logrus"
-	"golang.zx2c4.com/wireguard/conn"
-	"golang.zx2c4.com/wireguard/device"
-	"golang.zx2c4.com/wireguard/tun"
 	"golang.zx2c4.com/wireguard/wgctrl"
-	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
 	"net"
-	"time"
+	"os"
+	"runtime"
 )
 
 const (
-	defaultMTU = 1280
+	DefaultMTU = 1280
 )
 
-var (
+// WGIface represents a interface instance
-	tunIface tun.Device
+type WGIface struct {
-	// todo check after move the WgPort constant to the client
+	Name      string
-	WgPort = 51820
+	Port      int
-)
+	MTU       int
-
+	Address   WGAddress
-// CreateWithUserspace Creates a new Wireguard interface, using wireguard-go userspace implementation
+	Interface NetInterface
-func CreateWithUserspace(iface string, address string) error {
-	var err error
-	tunIface, err = tun.CreateTUN(iface, defaultMTU)
-	if err != nil {
-		return err
-	}
-
-	// We need to create a wireguard-go device and listen to configuration requests
-	tunDevice := device.NewDevice(tunIface, conn.NewDefaultBind(), device.NewLogger(device.LogLevelSilent, "[wiretrustee] "))
-	err = tunDevice.Up()
-	if err != nil {
-		return err
-	}
-	uapi, err := getUAPI(iface)
-	if err != nil {
-		return err
-	}
-
-	go func() {
-		for {
-			uapiConn, err := uapi.Accept()
-			if err != nil {
-				log.Debugln("uapi Accept failed with error: ", err)
-				continue
-			}
-			go tunDevice.IpcHandle(uapiConn)
-		}
-	}()
-
-	log.Debugln("UAPI listener started")
-
-	err = assignAddr(address, iface)
-	if err != nil {
-		return err
-	}
-	return nil
 }
 
-// configure peer for the wireguard device
+// WGAddress Wireguard parsed address
-func configureDevice(iface string, config wgtypes.Config) error {
+type WGAddress struct {
-	wg, err := wgctrl.New()
+	IP      net.IP
-	if err != nil {
+	Network *net.IPNet
-		return err
+}
-	}
-	defer wg.Close()
 
-	_, err = wg.Device(iface)
+// NetInterface represents a generic network tunnel interface
-	if err != nil {
+type NetInterface interface {
-		return err
+	Close() error
-	}
+}
-	log.Debugf("got Wireguard device %s", iface)
 
-	return wg.ConfigureDevice(iface, config)
+// NewWGIface Creates a new Wireguard interface instance
+func NewWGIface(iface string, address string, mtu int) (WGIface, error) {
+	wgIface := WGIface{
+		Name: iface,
+		MTU:  mtu,
+	}
+
+	wgAddress, err := parseAddress(address)
+	if err != nil {
+		return wgIface, err
+	}
+
+	wgIface.Address = wgAddress
+
+	return wgIface, nil
 }
 
 // Exists checks whether specified Wireguard device exists or not
@@ -101,141 +72,35 @@ func Exists(iface string) (*bool, error) {
 	return &exists, nil
 }
 
-// Configure configures a Wireguard interface
+// parseAddress parse a string ("1.2.3.4/24") address to WG Address
-// The interface must exist before calling this method (e.g. call interface.Create() before)
+func parseAddress(address string) (WGAddress, error) {
-func Configure(iface string, privateKey string) error {
+	ip, network, err := net.ParseCIDR(address)
-
-	log.Debugf("configuring Wireguard interface %s", iface)
-
-	log.Debugf("adding Wireguard private key")
-	key, err := wgtypes.ParseKey(privateKey)
 	if err != nil {
-		return err
+		return WGAddress{}, err
 	}
-	fwmark := 0
+	return WGAddress{
-	p := WgPort
+		IP:      ip,
-	config := wgtypes.Config{
+		Network: network,
-		PrivateKey:   &key,
+	}, nil
-		ReplacePeers: false,
-		FirewallMark: &fwmark,
-		ListenPort:   &p,
-	}
-
-	return configureDevice(iface, config)
 }
 
-// GetListenPort returns the listening port of the Wireguard endpoint
+// Closes the tunnel interface
-func GetListenPort(iface string) (*int, error) {
+func (w *WGIface) Close() error {
-	log.Debugf("getting Wireguard listen port of interface %s", iface)
 
-	//discover Wireguard current configuration
+	err := w.Interface.Close()
-	wg, err := wgctrl.New()
-	if err != nil {
-		return nil, err
-	}
-	defer wg.Close()
-
-	d, err := wg.Device(iface)
-	if err != nil {
-		return nil, err
-	}
-	log.Debugf("got Wireguard device listen port %s, %d", iface, d.ListenPort)
-
-	return &d.ListenPort, nil
-}
-
-// UpdatePeer updates existing Wireguard Peer or creates a new one if doesn't exist
-// Endpoint is optional
-func UpdatePeer(iface string, peerKey string, allowedIps string, keepAlive time.Duration, endpoint string, preSharedKey *wgtypes.Key) error {
-
-	log.Debugf("updating interface %s peer %s: endpoint %s ", iface, peerKey, endpoint)
-
-	//parse allowed ips
-	_, ipNet, err := net.ParseCIDR(allowedIps)
 	if err != nil {
 		return err
 	}
 
-	peerKeyParsed, err := wgtypes.ParseKey(peerKey)
+	if runtime.GOOS == "darwin" {
-	if err != nil {
+		sockPath := "/var/run/wireguard/" + w.Name + ".sock"
-		return err
+		if _, statErr := os.Stat(sockPath); statErr == nil {
-	}
+			statErr = os.Remove(sockPath)
-	peer := wgtypes.PeerConfig{
+			if statErr != nil {
-		PublicKey:                   peerKeyParsed,
+				return statErr
-		ReplaceAllowedIPs:           true,
+			}
-		AllowedIPs:                  []net.IPNet{*ipNet},
+		}
-		PersistentKeepaliveInterval: &keepAlive,
-		PresharedKey:                preSharedKey,
-	}
-
-	config := wgtypes.Config{
-		Peers: []wgtypes.PeerConfig{peer},
-	}
-
-	err = configureDevice(iface, config)
-	if err != nil {
-		return err
-	}
-
-	if endpoint != "" {
-		return UpdatePeerEndpoint(iface, peerKey, endpoint)
 	}
 
 	return nil
 }
-
-// UpdatePeerEndpoint updates a Wireguard interface Peer with the new endpoint
-// Used when NAT hole punching was successful and an update of the remote peer endpoint is required
-func UpdatePeerEndpoint(iface string, peerKey string, newEndpoint string) error {
-
-	log.Debugf("updating peer %s endpoint %s ", peerKey, newEndpoint)
-
-	peerAddr, err := net.ResolveUDPAddr("udp4", newEndpoint)
-	if err != nil {
-		return err
-	}
-
-	log.Debugf("parsed peer endpoint [%s]", peerAddr.String())
-
-	peerKeyParsed, err := wgtypes.ParseKey(peerKey)
-	if err != nil {
-		return err
-	}
-
-	peer := wgtypes.PeerConfig{
-		PublicKey:         peerKeyParsed,
-		ReplaceAllowedIPs: false,
-		UpdateOnly:        true,
-		Endpoint:          peerAddr,
-	}
-	config := wgtypes.Config{
-		Peers: []wgtypes.PeerConfig{peer},
-	}
-	return configureDevice(iface, config)
-}
-
-// RemovePeer removes a Wireguard Peer from the interface iface
-func RemovePeer(iface string, peerKey string) error {
-	log.Debugf("Removing peer %s from interface %s ", peerKey, iface)
-
-	peerKeyParsed, err := wgtypes.ParseKey(peerKey)
-	if err != nil {
-		return err
-	}
-
-	peer := wgtypes.PeerConfig{
-		PublicKey: peerKeyParsed,
-		Remove:    true,
-	}
-
-	config := wgtypes.Config{
-		Peers: []wgtypes.PeerConfig{peer},
-	}
-
-	return configureDevice(iface, config)
-}
-
-// Closes the User Space tunnel interface
-func CloseWithUserspace() error {
-	return tunIface.Close()
-}

iface/iface_darwin.go

@@ -2,62 +2,31 @@ package iface
 
 import (
 	log "github.com/sirupsen/logrus"
-	"net"
-	"os"
 	"os/exec"
-	"strings"
 )
 
 // Create Creates a new Wireguard interface, sets a given IP and brings it up.
-func Create(iface string, address string) error {
+func (w *WGIface) Create() error {
-	return CreateWithUserspace(iface, address)
+	return w.CreateWithUserspace()
 }
 
 // assignAddr Adds IP address to the tunnel interface and network route based on the range provided
-func assignAddr(address string, ifaceName string) error {
+func (w *WGIface) assignAddr() error {
-	ip := strings.Split(address, "/")
+	//mask,_ := w.Address.Network.Mask.Size()
-	cmd := exec.Command("ifconfig", ifaceName, "inet", address, ip[0])
+	//
+	//address := fmt.Sprintf("%s/%d",w.Address.IP.String() , mask)
+
+	cmd := exec.Command("ifconfig", w.Name, "inet", w.Address.IP.String(), w.Address.IP.String())
 	if out, err := cmd.CombinedOutput(); err != nil {
-		log.Infof("Command: %v failed with output %s and error: ", cmd.String(), out)
+		log.Infof("adding addreess command \"%v\" failed with output %s and error: ", cmd.String(), out)
 		return err
 	}
-	_, resolvedNet, err := net.ParseCIDR(address)
+
-	err = addRoute(ifaceName, resolvedNet)
+	routeCmd := exec.Command("route", "add", "-net", w.Address.Network.String(), "-interface", w.Name)
-	if err != nil {
+	if out, err := routeCmd.CombinedOutput(); err != nil {
-		log.Infoln("Adding route failed with error:", err)
+		log.Printf("adding route command \"%v\" failed with output %s and error: ", routeCmd.String(), out)
-	}
+		return err
-	return nil
-}
-
-// addRoute Adds network route based on the range provided
-func addRoute(iface string, ipNet *net.IPNet) error {
-	cmd := exec.Command("route", "add", "-net", ipNet.String(), "-interface", iface)
-	if out, err := cmd.CombinedOutput(); err != nil {
-		log.Printf("Command: %v failed with output %s and error: ", cmd.String(), out)
-		return err
-	}
-	return nil
-}
-
-// Closes the tunnel interface
-func Close() error {
-	name, err := tunIface.Name()
-	if err != nil {
-		return err
-	}
-
-	sockPath := "/var/run/wireguard/" + name + ".sock"
-
-	err = CloseWithUserspace()
-	if err != nil {
-		return err
-	}
-
-	if _, err := os.Stat(sockPath); err == nil {
-		err = os.Remove(sockPath)
-		if err != nil {
-			return err
-		}
 	}
+
 	return nil
 }

iface/iface_linux.go

@@ -1,37 +1,58 @@
 package iface
 
 import (
+	"errors"
 	"fmt"
+	"math"
+	"os"
+	"syscall"
+
 	log "github.com/sirupsen/logrus"
 	"github.com/vishvananda/netlink"
-	"golang.zx2c4.com/wireguard/wgctrl"
-	"os"
 )
 
+type NativeLink struct {
+	Link *netlink.Link
+}
+
+func WireguardModExists() bool {
+	link := newWGLink("mustnotexist")
+
+	// We willingly try to create a device with an invalid
+	// MTU here as the validation of the MTU will be performed after
+	// the validation of the link kind and hence allows us to check
+	// for the existance of the wireguard module without actually
+	// creating a link.
+	//
+	// As a side-effect, this will also let the kernel lazy-load
+	// the wireguard module.
+	link.attrs.MTU = math.MaxInt
+
+	err := netlink.LinkAdd(link)
+
+	return errors.Is(err, syscall.EINVAL)
+}
+
 // Create Creates a new Wireguard interface, sets a given IP and brings it up.
 // Will reuse an existing one.
-func Create(iface string, address string) error {
+func (w *WGIface) Create() error {
 
 	if WireguardModExists() {
 		log.Debug("using kernel Wireguard module")
-		return CreateWithKernel(iface, address)
+		return w.CreateWithKernel()
 	} else {
-		return CreateWithUserspace(iface, address)
+		return w.CreateWithUserspace()
 	}
 }
 
 // CreateWithKernel Creates a new Wireguard interface using kernel Wireguard module.
 // Works for Linux and offers much better network performance
-func CreateWithKernel(iface string, address string) error {
+func (w *WGIface) CreateWithKernel() error {
-	attrs := netlink.NewLinkAttrs()
-	attrs.Name = iface
 
-	link := wgLink{
+	link := newWGLink(w.Name)
-		attrs: &attrs,
-	}
 
 	// check if interface exists
-	l, err := netlink.LinkByName(iface)
+	l, err := netlink.LinkByName(w.Name)
 	if err != nil {
 		switch err.(type) {
 		case netlink.LinkNotFoundError:
@@ -43,37 +64,39 @@ func CreateWithKernel(iface string, address string) error {
 
 	// remove if interface exists
 	if l != nil {
-		err = netlink.LinkDel(&link)
+		err = netlink.LinkDel(link)
 		if err != nil {
 			return err
 		}
 	}
 
-	log.Debugf("adding device: %s", iface)
+	log.Debugf("adding device: %s", w.Name)
-	err = netlink.LinkAdd(&link)
+	err = netlink.LinkAdd(link)
 	if os.IsExist(err) {
-		log.Infof("interface %s already exists. Will reuse.", iface)
+		log.Infof("interface %s already exists. Will reuse.", w.Name)
 	} else if err != nil {
 		return err
 	}
 
-	err = assignAddr(address, iface)
+	w.Interface = link
+
+	err = w.assignAddr()
 	if err != nil {
 		return err
 	}
 
 	// todo do a discovery
-	log.Debugf("setting MTU: %d interface: %s", defaultMTU, iface)
+	log.Debugf("setting MTU: %d interface: %s", w.MTU, w.Name)
-	err = netlink.LinkSetMTU(&link, defaultMTU)
+	err = netlink.LinkSetMTU(link, w.MTU)
 	if err != nil {
-		log.Errorf("error setting MTU on interface: %s", iface)
+		log.Errorf("error setting MTU on interface: %s", w.Name)
 		return err
 	}
 
-	log.Debugf("bringing up interface: %s", iface)
+	log.Debugf("bringing up interface: %s", w.Name)
-	err = netlink.LinkSetUp(&link)
+	err = netlink.LinkSetUp(link)
 	if err != nil {
-		log.Errorf("error bringing up interface: %s", iface)
+		log.Errorf("error bringing up interface: %s", w.Name)
 		return err
 	}
 
@@ -81,39 +104,37 @@ func CreateWithKernel(iface string, address string) error {
 }
 
 // assignAddr Adds IP address to the tunnel interface
-func assignAddr(address, name string) error {
+func (w *WGIface) assignAddr() error {
-	var err error
-	attrs := netlink.NewLinkAttrs()
-	attrs.Name = name
 
-	link := wgLink{
+	mask, _ := w.Address.Network.Mask.Size()
-		attrs: &attrs,
+	address := fmt.Sprintf("%s/%d", w.Address.IP.String(), mask)
-	}
+
+	link := newWGLink(w.Name)
 
 	//delete existing addresses
-	list, err := netlink.AddrList(&link, 0)
+	list, err := netlink.AddrList(link, 0)
 	if err != nil {
 		return err
 	}
 	if len(list) > 0 {
 		for _, a := range list {
-			err = netlink.AddrDel(&link, &a)
+			err = netlink.AddrDel(link, &a)
 			if err != nil {
 				return err
 			}
 		}
 	}
 
-	log.Debugf("adding address %s to interface: %s", address, attrs.Name)
+	log.Debugf("adding address %s to interface: %s", address, w.Name)
 	addr, _ := netlink.ParseAddr(address)
-	err = netlink.AddrAdd(&link, addr)
+	err = netlink.AddrAdd(link, addr)
 	if os.IsExist(err) {
-		log.Infof("interface %s already has the address: %s", attrs.Name, address)
+		log.Infof("interface %s already has the address: %s", w.Name, address)
 	} else if err != nil {
 		return err
 	}
 	// On linux, the link must be brought up
-	err = netlink.LinkSetUp(&link)
+	err = netlink.LinkSetUp(link)
 	return err
 }
 
@@ -121,48 +142,26 @@ type wgLink struct {
 	attrs *netlink.LinkAttrs
 }
 
+func newWGLink(name string) *wgLink {
+	attrs := netlink.NewLinkAttrs()
+	attrs.Name = name
+
+	return &wgLink{
+		attrs: &attrs,
+	}
+}
+
 // Attrs returns the Wireguard's default attributes
-func (w *wgLink) Attrs() *netlink.LinkAttrs {
+func (l *wgLink) Attrs() *netlink.LinkAttrs {
-	return w.attrs
+	return l.attrs
 }
 
 // Type returns the interface type
-func (w *wgLink) Type() string {
+func (l *wgLink) Type() string {
 	return "wireguard"
 }
 
-// Closes the tunnel interface
+// Close deletes the link interface
-func Close() error {
+func (l *wgLink) Close() error {
-
+	return netlink.LinkDel(l)
-	if tunIface != nil {
-		return CloseWithUserspace()
-	} else {
-		var iface = ""
-		wg, err := wgctrl.New()
-		if err != nil {
-			return err
-		}
-		defer wg.Close()
-		devList, err := wg.Devices()
-		if err != nil {
-			return err
-		}
-		for _, wgDev := range devList {
-			// todo check after move the WgPort constant to the client
-			if wgDev.ListenPort == WgPort {
-				iface = wgDev.Name
-				break
-			}
-		}
-		if iface == "" {
-			return fmt.Errorf("Wireguard Interface not found")
-		}
-		attrs := netlink.NewLinkAttrs()
-		attrs.Name = iface
-
-		link := wgLink{
-			attrs: &attrs,
-		}
-		return netlink.LinkDel(&link)
-	}
 }

iface/iface_test.go

@@ -12,24 +12,36 @@ import (
 
 // keep darwin compability
 const (
-	key        = "0PMI6OkB5JmB+Jj/iWWHekuQRx+bipZirWCWKFXexHc="
+	WgIntNumber = 2000
-	peerPubKey = "Ok0mC0qlJyXEPKh2UFIpsI2jG0L7LRpC3sLAusSJ5CQ="
+)
+
+var (
+	key        string
+	peerPubKey string
 )
 
 func init() {
 	log.SetLevel(log.DebugLevel)
+	privateKey, _ := wgtypes.GeneratePrivateKey()
+	key = privateKey.String()
+	peerPrivateKey, _ := wgtypes.GeneratePrivateKey()
+	peerPubKey = peerPrivateKey.PublicKey().String()
 }
 
 //
 func Test_CreateInterface(t *testing.T) {
-	ifaceName := "utun999"
+	ifaceName := fmt.Sprintf("utun%d", WgIntNumber+1)
-	wgIP := "10.99.99.1/24"
+	wgIP := "10.99.99.1/32"
-	err := Create(ifaceName, wgIP)
+	iface, err := NewWGIface(ifaceName, wgIP, DefaultMTU)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = iface.Create()
 	if err != nil {
 		t.Fatal(err)
 	}
 	defer func() {
-		err = Close()
+		err = iface.Close()
 		if err != nil {
 			t.Error(err)
 		}
@@ -44,29 +56,59 @@ func Test_CreateInterface(t *testing.T) {
 			t.Error(err)
 		}
 	}()
+}
 
-	d, err := wg.Device(ifaceName)
+func Test_Close(t *testing.T) {
+	ifaceName := fmt.Sprintf("utun%d", WgIntNumber+2)
+	wgIP := "10.99.99.2/32"
+	iface, err := NewWGIface(ifaceName, wgIP, DefaultMTU)
 	if err != nil {
 		t.Fatal(err)
 	}
-	// todo move the WgPort constant to the client
+	err = iface.Create()
-	WgPort = d.ListenPort
+	if err != nil {
-}
+		t.Fatal(err)
-func Test_ConfigureInterface(t *testing.T) {
+	}
-	ifaceName := "utun1000"
+	wg, err := wgctrl.New()
-	wgIP := "10.99.99.10/24"
-	err := Create(ifaceName, wgIP)
 	if err != nil {
 		t.Fatal(err)
 	}
 	defer func() {
-		err = Close()
+		err = wg.Close()
 		if err != nil {
 			t.Error(err)
 		}
 	}()
 
-	err = Configure(ifaceName, key)
+	err = iface.Close()
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func Test_ConfigureInterface(t *testing.T) {
+	ifaceName := fmt.Sprintf("utun%d", WgIntNumber+3)
+	wgIP := "10.99.99.5/30"
+	iface, err := NewWGIface(ifaceName, wgIP, DefaultMTU)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = iface.Create()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		err = iface.Close()
+		if err != nil {
+			t.Error(err)
+		}
+	}()
+
+	port, err := iface.GetListenPort()
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = iface.Configure(key, *port)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -92,30 +134,41 @@ func Test_ConfigureInterface(t *testing.T) {
 }
 
 func Test_UpdatePeer(t *testing.T) {
-	ifaceName := "utun1001"
+	ifaceName := fmt.Sprintf("utun%d", WgIntNumber+4)
-	wgIP := "10.99.99.20/24"
+	wgIP := "10.99.99.9/30"
-	err := Create(ifaceName, wgIP)
+	iface, err := NewWGIface(ifaceName, wgIP, DefaultMTU)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = iface.Create()
 	if err != nil {
 		t.Fatal(err)
 	}
 	defer func() {
-		err = Close()
+		err = iface.Close()
 		if err != nil {
 			t.Error(err)
 		}
 	}()
-	err = Configure(ifaceName, key)
+	port, err := iface.GetListenPort()
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = iface.Configure(key, *port)
 	if err != nil {
 		t.Fatal(err)
 	}
 	keepAlive := 15 * time.Second
-	allowedIP := "10.99.99.2/32"
+	allowedIP := "10.99.99.10/32"
-	endpoint := "127.0.0.1:9900"
+	endpoint, err := net.ResolveUDPAddr("udp", "127.0.0.1:9900")
-	err = UpdatePeer(ifaceName, peerPubKey, allowedIP, keepAlive, endpoint, nil)
 	if err != nil {
 		t.Fatal(err)
 	}
-	peer, err := getPeer(ifaceName, t)
+	err = iface.UpdatePeer(peerPubKey, allowedIP, keepAlive, endpoint, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	peer, err := getPeer(ifaceName, peerPubKey, t)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -123,11 +176,7 @@ func Test_UpdatePeer(t *testing.T) {
 		t.Fatal("configured peer with mismatched keepalive interval value")
 	}
 
-	resolvedEndpoint, err := net.ResolveUDPAddr("udp", endpoint)
+	if peer.Endpoint.String() != endpoint.String() {
-	if err != nil {
-		t.Fatal(err)
-	}
-	if peer.Endpoint.String() != resolvedEndpoint.String() {
 		t.Fatal("configured peer with mismatched endpoint")
 	}
 
@@ -143,110 +192,144 @@ func Test_UpdatePeer(t *testing.T) {
 	}
 }
 
-func Test_UpdatePeerEndpoint(t *testing.T) {
-	ifaceName := "utun1002"
-	wgIP := "10.99.99.30/24"
-	err := Create(ifaceName, wgIP)
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer func() {
-		err = Close()
-		if err != nil {
-			t.Error(err)
-		}
-	}()
-	err = Configure(ifaceName, key)
-	if err != nil {
-		t.Fatal(err)
-	}
-	keepAlive := 15 * time.Second
-	allowedIP := "10.99.99.2/32"
-	endpoint := "127.0.0.1:9900"
-	err = UpdatePeer(ifaceName, peerPubKey, allowedIP, keepAlive, endpoint, nil)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	newEndpoint := "127.0.0.1:9999"
-	err = UpdatePeerEndpoint(ifaceName, peerPubKey, newEndpoint)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	peer, err := getPeer(ifaceName, t)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if peer.Endpoint.String() != newEndpoint {
-		t.Fatal("configured peer with mismatched endpoint")
-	}
-}
-
 func Test_RemovePeer(t *testing.T) {
-	ifaceName := "utun1003"
+	ifaceName := fmt.Sprintf("utun%d", WgIntNumber+4)
-	wgIP := "10.99.99.40/24"
+	wgIP := "10.99.99.13/30"
-	err := Create(ifaceName, wgIP)
+	iface, err := NewWGIface(ifaceName, wgIP, DefaultMTU)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = iface.Create()
 	if err != nil {
 		t.Fatal(err)
 	}
 	defer func() {
-		err = Close()
+		err = iface.Close()
 		if err != nil {
 			t.Error(err)
 		}
 	}()
-	err = Configure(ifaceName, key)
+	port, err := iface.GetListenPort()
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = iface.Configure(key, *port)
 	if err != nil {
 		t.Fatal(err)
 	}
 	keepAlive := 15 * time.Second
-	allowedIP := "10.99.99.2/32"
+	allowedIP := "10.99.99.14/32"
-	endpoint := "127.0.0.1:9900"
+
-	err = UpdatePeer(ifaceName, peerPubKey, allowedIP, keepAlive, endpoint, nil)
+	err = iface.UpdatePeer(peerPubKey, allowedIP, keepAlive, nil, nil)
 	if err != nil {
 		t.Fatal(err)
 	}
-	err = RemovePeer(ifaceName, peerPubKey)
+	err = iface.RemovePeer(peerPubKey)
 	if err != nil {
 		t.Fatal(err)
 	}
-	_, err = getPeer(ifaceName, t)
+	_, err = getPeer(ifaceName, peerPubKey, t)
 	if err.Error() != "peer not found" {
 		t.Fatal(err)
 	}
 }
-func Test_Close(t *testing.T) {
+
-	ifaceName := "utun1004"
+func Test_ConnectPeers(t *testing.T) {
-	wgIP := "10.99.99.50/24"
+	peer1ifaceName := fmt.Sprintf("utun%d", WgIntNumber+400)
-	err := Create(ifaceName, wgIP)
+	peer1wgIP := "10.99.99.17/30"
+	peer1Key, _ := wgtypes.GeneratePrivateKey()
+	//peer1Port := WgPort + 4
+
+	peer2ifaceName := fmt.Sprintf("utun%d", 500)
+	peer2wgIP := "10.99.99.18/30"
+	peer2Key, _ := wgtypes.GeneratePrivateKey()
+	//peer2Port := WgPort + 5
+
+	keepAlive := 1 * time.Second
+
+	iface1, err := NewWGIface(peer1ifaceName, peer1wgIP, DefaultMTU)
 	if err != nil {
 		t.Fatal(err)
 	}
-	wg, err := wgctrl.New()
+	err = iface1.Create()
+	if err != nil {
+		t.Fatal(err)
+	}
+	peer1Port, err := iface1.GetListenPort()
+	if err != nil {
+		t.Fatal(err)
+	}
+	peer1endpoint, err := net.ResolveUDPAddr("udp", fmt.Sprintf("127.0.0.1:%d", *peer1Port))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	iface2, err := NewWGIface(peer2ifaceName, peer2wgIP, DefaultMTU)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = iface2.Create()
+	if err != nil {
+		t.Fatal(err)
+	}
+	peer2Port, err := iface2.GetListenPort()
+	if err != nil {
+		t.Fatal(err)
+	}
+	peer2endpoint, err := net.ResolveUDPAddr("udp", fmt.Sprintf("127.0.0.1:%d", *peer2Port))
 	if err != nil {
 		t.Fatal(err)
 	}
 	defer func() {
-		err = wg.Close()
+		err = iface1.Close()
+		if err != nil {
+			t.Error(err)
+		}
+		err = iface2.Close()
 		if err != nil {
 			t.Error(err)
 		}
 	}()
 
-	d, err := wg.Device(ifaceName)
+	err = iface1.Configure(peer1Key.String(), *peer1Port)
 	if err != nil {
 		t.Fatal(err)
 	}
-	// todo move the WgPort constant to the client
+	err = iface2.Configure(peer2Key.String(), *peer2Port)
-	WgPort = d.ListenPort
-	err = Close()
 	if err != nil {
 		t.Fatal(err)
 	}
+
+	err = iface1.UpdatePeer(peer2Key.PublicKey().String(), peer2wgIP, keepAlive, peer2endpoint, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = iface2.UpdatePeer(peer1Key.PublicKey().String(), peer1wgIP, keepAlive, peer1endpoint, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	timeout := 10 * time.Second
+	timeoutChannel := time.After(timeout)
+	for {
+		select {
+		case <-timeoutChannel:
+			t.Fatalf("waiting for peer handshake timeout after %s", timeout.String())
+		default:
+		}
+		peer, gpErr := getPeer(peer1ifaceName, peer2Key.PublicKey().String(), t)
+		if gpErr != nil {
+			t.Fatal(gpErr)
+		}
+		if !peer.LastHandshakeTime.IsZero() {
+			t.Log("peers successfully handshake")
+			break
+		}
+	}
+
 }
-func getPeer(ifaceName string, t *testing.T) (wgtypes.Peer, error) {
+
+func getPeer(ifaceName, peerPubKey string, t *testing.T) (wgtypes.Peer, error) {
 	emptyPeer := wgtypes.Peer{}
 	wg, err := wgctrl.New()
 	if err != nil {

iface/iface_unix.go

@@ -1,12 +1,58 @@
+//go:build linux || darwin
 // +build linux darwin
 
 package iface
 
 import (
+	log "github.com/sirupsen/logrus"
+	"golang.zx2c4.com/wireguard/conn"
+	"golang.zx2c4.com/wireguard/device"
 	"golang.zx2c4.com/wireguard/ipc"
+	"golang.zx2c4.com/wireguard/tun"
 	"net"
 )
 
+// CreateWithUserspace Creates a new Wireguard interface, using wireguard-go userspace implementation
+func (w *WGIface) CreateWithUserspace() error {
+
+	tunIface, err := tun.CreateTUN(w.Name, w.MTU)
+	if err != nil {
+		return err
+	}
+
+	w.Interface = tunIface
+
+	// We need to create a wireguard-go device and listen to configuration requests
+	tunDevice := device.NewDevice(tunIface, conn.NewDefaultBind(), device.NewLogger(device.LogLevelSilent, "[wiretrustee] "))
+	err = tunDevice.Up()
+	if err != nil {
+		return err
+	}
+	uapi, err := getUAPI(w.Name)
+	if err != nil {
+		return err
+	}
+
+	go func() {
+		for {
+			uapiConn, uapiErr := uapi.Accept()
+			if uapiErr != nil {
+				log.Traceln("uapi Accept failed with error: ", uapiErr)
+				continue
+			}
+			go tunDevice.IpcHandle(uapiConn)
+		}
+	}()
+
+	log.Debugln("UAPI listener started")
+
+	err = w.assignAddr()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
 // getUAPI returns a Listener
 func getUAPI(iface string) (net.Listener, error) {
 	tunSock, err := ipc.UAPIOpen(iface)

iface/iface_windows.go

@@ -1,46 +1,47 @@
 package iface
 
 import (
+	"fmt"
 	log "github.com/sirupsen/logrus"
-	"golang.zx2c4.com/wireguard/ipc"
+	"golang.org/x/sys/windows"
-	"golang.zx2c4.com/wireguard/tun"
+	"golang.zx2c4.com/wireguard/windows/driver"
 	"golang.zx2c4.com/wireguard/windows/tunnel/winipcfg"
 	"net"
 )
 
 // Create Creates a new Wireguard interface, sets a given IP and brings it up.
-func Create(iface string, address string) error {
+func (w *WGIface) Create() error {
-	return CreateWithUserspace(iface, address)
+
+	WintunStaticRequestedGUID, _ := windows.GenerateGUID()
+	adapter, err := driver.CreateAdapter(w.Name, "WireGuard", &WintunStaticRequestedGUID)
+	if err != nil {
+		err = fmt.Errorf("error creating adapter: %w", err)
+		return err
+	}
+	w.Interface = adapter
+	luid := adapter.LUID()
+	err = adapter.SetLogging(driver.AdapterLogOn)
+	if err != nil {
+		err = fmt.Errorf("Error enabling adapter logging: %w", err)
+		return err
+	}
+	err = adapter.SetAdapterState(driver.AdapterStateUp)
+	if err != nil {
+		return err
+	}
+	state, _ := luid.GUID()
+	log.Debugln("device guid: ", state.String())
+	return w.assignAddr(luid)
 }
 
 // assignAddr Adds IP address to the tunnel interface and network route based on the range provided
-func assignAddr(address string, ifaceName string) error {
+func (w *WGIface) assignAddr(luid winipcfg.LUID) error {
 
-	nativeTunDevice := tunIface.(*tun.NativeTun)
+	log.Debugf("adding address %s to interface: %s", w.Address.IP, w.Name)
-	luid := winipcfg.LUID(nativeTunDevice.LUID())
+	err := luid.SetIPAddresses([]net.IPNet{{w.Address.IP, w.Address.Network.Mask}})
-
-	ip, ipnet, _ := net.ParseCIDR(address)
-
-	log.Debugf("adding address %s to interface: %s", address, ifaceName)
-	err := luid.SetIPAddresses([]net.IPNet{{ip, ipnet.Mask}})
 	if err != nil {
 		return err
 	}
 
-	log.Debugf("adding Routes to interface: %s", ifaceName)
-	err = luid.SetRoutes([]*winipcfg.RouteData{{*ipnet, ipnet.IP, 0}})
-	if err != nil {
-		return err
-	}
 	return nil
 }
-
-// getUAPI returns a Listener
-func getUAPI(iface string) (net.Listener, error) {
-	return ipc.UAPIListen(iface)
-}
-
-// Closes the tunnel interface
-func Close() error {
-	return CloseWithUserspace()
-}

iface/mod.go

@@ -1,144 +0,0 @@
-// +build linux
-
-package iface
-
-// Holds logic to check existence of Wireguard kernel module
-// Copied from https://github.com/paultag/go-modprobe
-
-import (
-	"debug/elf"
-	"fmt"
-	"golang.org/x/sys/unix"
-	"os"
-	"path/filepath"
-	"strings"
-)
-
-var (
-	// get the root directory for the kernel modules. If this line panics,
-	// it's because getModuleRoot has failed to get the uname of the running
-	// kernel (likely a non-POSIX system, but maybe a broken kernel?)
-	moduleRoot = getModuleRoot()
-)
-
-// Get the module root (/lib/modules/$(uname -r)/)
-func getModuleRoot() string {
-	uname := unix.Utsname{}
-	if err := unix.Uname(&uname); err != nil {
-		panic(err)
-	}
-
-	i := 0
-	for ; uname.Release[i] != 0; i++ {
-	}
-
-	return filepath.Join(
-		"/lib/modules",
-		string(uname.Release[:i]),
-	)
-}
-
-// modName will, given a file descriptor to a Kernel Module (.ko file), parse the
-// binary to get the module name. For instance, given a handle to the file at
-// `kernel/drivers/usb/gadget/legacy/g_ether.ko`, return `g_ether`.
-func modName(file *os.File) (string, error) {
-	f, err := elf.NewFile(file)
-	if err != nil {
-		return "", err
-	}
-
-	syms, err := f.Symbols()
-	if err != nil {
-		return "", err
-	}
-
-	for _, sym := range syms {
-		if strings.Compare(sym.Name, "__this_module") == 0 {
-			section := f.Sections[sym.Section]
-			data, err := section.Data()
-			if err != nil {
-				return "", err
-			}
-
-			if len(data) < 25 {
-				return "", fmt.Errorf("modprobe: data is short, __this_module is '%s'", data)
-			}
-
-			data = data[24:]
-			i := 0
-			for ; data[i] != 0x00; i++ {
-			}
-			return string(data[:i]), nil
-		}
-	}
-
-	return "", fmt.Errorf("No name found. Is this a .ko or just an ELF?")
-}
-
-// Open every single kernel module under the root, and parse the ELF headers to
-// extract the module name.
-func elfMap(root string) (map[string]string, error) {
-	ret := map[string]string{}
-
-	err := filepath.Walk(
-		root,
-		func(path string, info os.FileInfo, err error) error {
-
-			if err != nil {
-				// skip broken files
-				return nil
-			}
-
-			if !info.Mode().IsRegular() {
-				return nil
-			}
-			fd, err := os.Open(path)
-			if err != nil {
-				return err
-			}
-			defer fd.Close()
-			name, err := modName(fd)
-			if err != nil {
-				/* For now, let's just ignore that and avoid adding to it */
-				return nil
-			}
-
-			ret[name] = path
-			return nil
-		})
-
-	if err != nil {
-		return nil, err
-	}
-
-	return ret, nil
-}
-
-// Open every single kernel module under the kernel module directory
-// (/lib/modules/$(uname -r)/), and parse the ELF headers to extract the
-// module name.
-func generateMap() (map[string]string, error) {
-	return elfMap(moduleRoot)
-}
-
-// WireguardModExists returns true if Wireguard kernel module exists.
-func WireguardModExists() bool {
-	_, err := resolveModName("wireguard")
-	return err == nil
-}
-
-// resolveModName will, given a module name (such as `wireguard`) return an absolute
-// path to the .ko that provides that module.
-func resolveModName(name string) (string, error) {
-	paths, err := generateMap()
-	if err != nil {
-		return "", err
-	}
-
-	fsPath := paths[name]
-	if !strings.HasPrefix(fsPath, moduleRoot) {
-		return "", fmt.Errorf("module isn't in the module directory")
-	}
-
-	return fsPath, nil
-}

infrastructure_files/management.json.tmpl

@@ -28,12 +28,19 @@
     },
     "Datadir": "",
     "HttpConfig": {
-        "LetsEncryptDomain": "",
-        "CertFile":"/etc/letsencrypt/live/$WIRETRUSTEE_DOMAIN/fullchain.pem",
-        "CertKey":"/etc/letsencrypt/live/$WIRETRUSTEE_DOMAIN/privkey.pem",
         "Address": "0.0.0.0:33071",
         "AuthIssuer": "https://$WIRETRUSTEE_AUTH0_DOMAIN/",
         "AuthAudience": "$WIRETRUSTEE_AUTH0_AUDIENCE",
         "AuthKeysLocation": "https://$WIRETRUSTEE_AUTH0_DOMAIN/.well-known/jwks.json"
-    }
+    },
+    "IdpManagerConfig": {
+        "Manager": "none",
+        "Auth0ClientCredentials": {
+        "Audience": "<PASTE YOUR AUTH0 AUDIENCE HERE>",
+        "AuthIssuer": "<PASTE YOUR AUTH0 Auth Issuer HERE>",
+        "ClientId": "<PASTE YOUR AUTH0 Application Client ID HERE>",
+        "ClientSecret": "<PASTE YOUR AUTH0 Application Client Secret HERE>",
+         "GrantType": "client_credentials"
+         }
+     }
 }

management/README.md

@@ -45,7 +45,7 @@ docker run -d --name wiretrustee-management \
 wiretrustee/management:latest \
 --letsencrypt-domain <YOUR-DOMAIN>
 ```
-> An example of config.json can be found here [config.json](../infrastructure_files/config.json)
+> An example of config.json can be found here [management.json](../infrastructure_files/management.json.tmpl)
 
 Trigger Let's encrypt certificate generation:
 ```bash

management/client/client.go

@@ -1,253 +1,17 @@
 package client
 
 import (
-	"context"
+	"io"
-	"crypto/tls"
+
-	"fmt"
-	"github.com/cenkalti/backoff/v4"
-	log "github.com/sirupsen/logrus"
 	"github.com/wiretrustee/wiretrustee/client/system"
-	"github.com/wiretrustee/wiretrustee/encryption"
 	"github.com/wiretrustee/wiretrustee/management/proto"
 	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/connectivity"
-	"google.golang.org/grpc/credentials"
-	"google.golang.org/grpc/credentials/insecure"
-	"google.golang.org/grpc/keepalive"
-	"io"
-	"time"
 )
 
-type Client struct {
+type Client interface {
-	key        wgtypes.Key
+	io.Closer
-	realClient proto.ManagementServiceClient
+	Sync(msgHandler func(msg *proto.SyncResponse) error) error
-	ctx        context.Context
+	GetServerPublicKey() (*wgtypes.Key, error)
-	conn       *grpc.ClientConn
+	Register(serverKey wgtypes.Key, setupKey string, info *system.Info) (*proto.LoginResponse, error)
-}
+	Login(serverKey wgtypes.Key) (*proto.LoginResponse, error)
-
-// NewClient creates a new client to Management service
-func NewClient(ctx context.Context, addr string, ourPrivateKey wgtypes.Key, tlsEnabled bool) (*Client, error) {
-
-	transportOption := grpc.WithTransportCredentials(insecure.NewCredentials())
-
-	if tlsEnabled {
-		transportOption = grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{}))
-	}
-
-	mgmCtx, cancel := context.WithTimeout(ctx, 10*time.Second)
-	defer cancel()
-	conn, err := grpc.DialContext(
-		mgmCtx,
-		addr,
-		transportOption,
-		grpc.WithBlock(),
-		grpc.WithKeepaliveParams(keepalive.ClientParameters{
-			Time:    15 * time.Second,
-			Timeout: 10 * time.Second,
-		}))
-
-	if err != nil {
-		log.Errorf("failed creating connection to Management Service %v", err)
-		return nil, err
-	}
-
-	realClient := proto.NewManagementServiceClient(conn)
-
-	return &Client{
-		key:        ourPrivateKey,
-		realClient: realClient,
-		ctx:        ctx,
-		conn:       conn,
-	}, nil
-}
-
-// Close closes connection to the Management Service
-func (c *Client) Close() error {
-	return c.conn.Close()
-}
-
-//defaultBackoff is a basic backoff mechanism for general issues
-func defaultBackoff(ctx context.Context) backoff.BackOff {
-	return backoff.WithContext(&backoff.ExponentialBackOff{
-		InitialInterval:     800 * time.Millisecond,
-		RandomizationFactor: backoff.DefaultRandomizationFactor,
-		Multiplier:          backoff.DefaultMultiplier,
-		MaxInterval:         10 * time.Second,
-		MaxElapsedTime:      12 * time.Hour, //stop after 12 hours of trying, the error will be propagated to the general retry of the client
-		Stop:                backoff.Stop,
-		Clock:               backoff.SystemClock,
-	}, ctx)
-}
-
-// ready indicates whether the client is okay and ready to be used
-// for now it just checks whether gRPC connection to the service is ready
-func (c *Client) ready() bool {
-	return c.conn.GetState() == connectivity.Ready
-}
-
-// Sync wraps the real client's Sync endpoint call and takes care of retries and encryption/decryption of messages
-// Blocking request. The result will be sent via msgHandler callback function
-func (c *Client) Sync(msgHandler func(msg *proto.SyncResponse) error) error {
-
-	var backOff = defaultBackoff(c.ctx)
-
-	operation := func() error {
-
-		log.Debugf("management connection state %v", c.conn.GetState())
-
-		if !c.ready() {
-			return fmt.Errorf("no connection to management")
-		}
-
-		// todo we already have it since we did the Login, maybe cache it locally?
-		serverPubKey, err := c.GetServerPublicKey()
-		if err != nil {
-			log.Errorf("failed getting Management Service public key: %s", err)
-			return err
-		}
-
-		stream, err := c.connectToStream(*serverPubKey)
-		if err != nil {
-			log.Errorf("failed to open Management Service stream: %s", err)
-			return err
-		}
-
-		log.Infof("connected to the Management Service stream")
-
-		// blocking until error
-		err = c.receiveEvents(stream, *serverPubKey, msgHandler)
-		if err != nil {
-			backOff.Reset()
-			return err
-		}
-
-		return nil
-	}
-
-	err := backoff.Retry(operation, backOff)
-	if err != nil {
-		log.Warnf("exiting Management Service connection retry loop due to unrecoverable error: %s", err)
-		return err
-	}
-
-	return nil
-}
-
-func (c *Client) connectToStream(serverPubKey wgtypes.Key) (proto.ManagementService_SyncClient, error) {
-	req := &proto.SyncRequest{}
-
-	myPrivateKey := c.key
-	myPublicKey := myPrivateKey.PublicKey()
-
-	encryptedReq, err := encryption.EncryptMessage(serverPubKey, myPrivateKey, req)
-	if err != nil {
-		log.Errorf("failed encrypting message: %s", err)
-		return nil, err
-	}
-
-	syncReq := &proto.EncryptedMessage{WgPubKey: myPublicKey.String(), Body: encryptedReq}
-	return c.realClient.Sync(c.ctx, syncReq)
-}
-
-func (c *Client) receiveEvents(stream proto.ManagementService_SyncClient, serverPubKey wgtypes.Key, msgHandler func(msg *proto.SyncResponse) error) error {
-	for {
-		update, err := stream.Recv()
-		if err == io.EOF {
-			log.Errorf("Management stream has been closed by server: %s", err)
-			return err
-		}
-		if err != nil {
-			log.Warnf("disconnected from Management Service sync stream: %v", err)
-			return err
-		}
-
-		log.Debugf("got an update message from Management Service")
-		decryptedResp := &proto.SyncResponse{}
-		err = encryption.DecryptMessage(serverPubKey, c.key, update.Body, decryptedResp)
-		if err != nil {
-			log.Errorf("failed decrypting update message from Management Service: %s", err)
-			return err
-		}
-
-		err = msgHandler(decryptedResp)
-		if err != nil {
-			log.Errorf("failed handling an update message received from Management Service: %v", err.Error())
-			return err
-		}
-	}
-}
-
-// GetServerPublicKey returns server Wireguard public key (used later for encrypting messages sent to the server)
-func (c *Client) GetServerPublicKey() (*wgtypes.Key, error) {
-	if !c.ready() {
-		return nil, fmt.Errorf("no connection to management")
-	}
-
-	mgmCtx, cancel := context.WithTimeout(c.ctx, 5*time.Second) //todo make a general setting
-	defer cancel()
-	resp, err := c.realClient.GetServerKey(mgmCtx, &proto.Empty{})
-	if err != nil {
-		return nil, err
-	}
-
-	serverKey, err := wgtypes.ParseKey(resp.Key)
-	if err != nil {
-		return nil, err
-	}
-
-	return &serverKey, nil
-}
-
-func (c *Client) login(serverKey wgtypes.Key, req *proto.LoginRequest) (*proto.LoginResponse, error) {
-	if !c.ready() {
-		return nil, fmt.Errorf("no connection to management")
-	}
-	loginReq, err := encryption.EncryptMessage(serverKey, c.key, req)
-	if err != nil {
-		log.Errorf("failed to encrypt message: %s", err)
-		return nil, err
-	}
-	mgmCtx, cancel := context.WithTimeout(c.ctx, 5*time.Second) //todo make a general setting
-	defer cancel()
-	resp, err := c.realClient.Login(mgmCtx, &proto.EncryptedMessage{
-		WgPubKey: c.key.PublicKey().String(),
-		Body:     loginReq,
-	})
-
-	if err != nil {
-		return nil, err
-	}
-
-	loginResp := &proto.LoginResponse{}
-	err = encryption.DecryptMessage(serverKey, c.key, resp.Body, loginResp)
-	if err != nil {
-		log.Errorf("failed to decrypt registration message: %s", err)
-		return nil, err
-	}
-
-	return loginResp, nil
-}
-
-// Register registers peer on Management Server. It actually calls a Login endpoint with a provided setup key
-// Takes care of encrypting and decrypting messages.
-// This method will also collect system info and send it with the request (e.g. hostname, os, etc)
-func (c *Client) Register(serverKey wgtypes.Key, setupKey string) (*proto.LoginResponse, error) {
-	gi := system.GetInfo()
-	meta := &proto.PeerSystemMeta{
-		Hostname:           gi.Hostname,
-		GoOS:               gi.GoOS,
-		OS:                 gi.OS,
-		Core:               gi.OSVersion,
-		Platform:           gi.Platform,
-		Kernel:             gi.Kernel,
-		WiretrusteeVersion: "",
-	}
-	log.Debugf("detected system %v", meta)
-	return c.login(serverKey, &proto.LoginRequest{SetupKey: setupKey, Meta: meta})
-}
-
-// Login attempts login to Management Server. Takes care of encrypting and decrypting messages.
-func (c *Client) Login(serverKey wgtypes.Key) (*proto.LoginResponse, error) {
-	return c.login(serverKey, &proto.LoginRequest{})
 }

management/client/client_test.go

@@ -2,7 +2,18 @@ package client
 
 import (
 	"context"
+	"net"
+	"path/filepath"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/wiretrustee/wiretrustee/client/system"
+
 	log "github.com/sirupsen/logrus"
+	"github.com/stretchr/testify/assert"
+	"github.com/wiretrustee/wiretrustee/encryption"
+	"github.com/wiretrustee/wiretrustee/management/proto"
 	mgmtProto "github.com/wiretrustee/wiretrustee/management/proto"
 	mgmt "github.com/wiretrustee/wiretrustee/management/server"
 	"github.com/wiretrustee/wiretrustee/util"
@@ -10,14 +21,12 @@ import (
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
-	"net"
-	"path/filepath"
-	"testing"
-	"time"
 )
 
-var tested *Client
+var tested *GrpcClient
 var serverAddr string
+var mgmtMockServer *mgmt.ManagementServiceServerMock
+var serverKey wgtypes.Key
 
 const ValidKey = "A2C8E62B-38F5-4553-B31E-DD66C696CEBB"
 
@@ -61,7 +70,7 @@ func startManagement(config *mgmt.Config, t *testing.T) (*grpc.Server, net.Liste
 	}
 
 	peersUpdateManager := mgmt.NewPeersUpdateManager()
-	accountManager := mgmt.NewManager(store, peersUpdateManager)
+	accountManager := mgmt.NewManager(store, peersUpdateManager, nil)
 	turnManager := mgmt.NewTimeBasedAuthSecretsManager(peersUpdateManager, config.TURNConfig)
 	mgmtServer, err := mgmt.NewServer(config, accountManager, peersUpdateManager, turnManager)
 	if err != nil {
@@ -78,6 +87,39 @@ func startManagement(config *mgmt.Config, t *testing.T) (*grpc.Server, net.Liste
 	return s, lis
 }
 
+func startMockManagement(t *testing.T) (*grpc.Server, net.Listener) {
+	lis, err := net.Listen("tcp", ":0")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	s := grpc.NewServer()
+
+	serverKey, err = wgtypes.GenerateKey()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	mgmtMockServer = &mgmt.ManagementServiceServerMock{
+		GetServerKeyFunc: func(context.Context, *proto.Empty) (*proto.ServerKeyResponse, error) {
+			response := &proto.ServerKeyResponse{
+				Key: serverKey.PublicKey().String(),
+			}
+			return response, nil
+		},
+	}
+
+	mgmtProto.RegisterManagementServiceServer(s, mgmtMockServer)
+	go func() {
+		if err := s.Serve(lis); err != nil {
+			t.Error(err)
+			return
+		}
+	}()
+
+	return s, lis
+}
+
 func TestClient_GetServerPublicKey(t *testing.T) {
 
 	key, err := tested.GetServerPublicKey()
@@ -109,7 +151,8 @@ func TestClient_LoginRegistered(t *testing.T) {
 	if err != nil {
 		t.Error(err)
 	}
-	resp, err := tested.Register(*key, ValidKey)
+	info := system.GetInfo()
+	resp, err := tested.Register(*key, ValidKey, info)
 	if err != nil {
 		t.Error(err)
 	}
@@ -125,7 +168,8 @@ func TestClient_Sync(t *testing.T) {
 		t.Error(err)
 	}
 
-	_, err = tested.Register(*serverKey, ValidKey)
+	info := system.GetInfo()
+	_, err = tested.Register(*serverKey, ValidKey, info)
 	if err != nil {
 		t.Error(err)
 	}
@@ -139,7 +183,9 @@ func TestClient_Sync(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	_, err = remoteClient.Register(*serverKey, ValidKey)
+
+	info = system.GetInfo()
+	_, err = remoteClient.Register(*serverKey, ValidKey, info)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -177,3 +223,82 @@ func TestClient_Sync(t *testing.T) {
 		t.Error("timeout waiting for test to finish")
 	}
 }
+
+func Test_SystemMetaDataFromClient(t *testing.T) {
+	_, lis := startMockManagement(t)
+
+	testKey, err := wgtypes.GenerateKey()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	serverAddr := lis.Addr().String()
+	ctx := context.Background()
+
+	testClient, err := NewClient(ctx, serverAddr, testKey, false)
+	if err != nil {
+		log.Fatalf("error while creating testClient: %v", err)
+	}
+
+	key, err := testClient.GetServerPublicKey()
+	if err != nil {
+		log.Fatalf("error while getting server public key from testclient, %v", err)
+	}
+
+	var actualMeta *proto.PeerSystemMeta
+	var actualValidKey string
+	var wg sync.WaitGroup
+	wg.Add(1)
+
+	mgmtMockServer.LoginFunc =
+		func(ctx context.Context, msg *proto.EncryptedMessage) (*proto.EncryptedMessage, error) {
+			peerKey, err := wgtypes.ParseKey(msg.GetWgPubKey())
+			if err != nil {
+				log.Warnf("error while parsing peer's Wireguard public key %s on Sync request.", msg.WgPubKey)
+				return nil, status.Errorf(codes.InvalidArgument, "provided wgPubKey %s is invalid", msg.WgPubKey)
+			}
+
+			loginReq := &proto.LoginRequest{}
+			err = encryption.DecryptMessage(peerKey, serverKey, msg.Body, loginReq)
+			if err != nil {
+				log.Fatal(err)
+			}
+
+			actualMeta = loginReq.GetMeta()
+			actualValidKey = loginReq.GetSetupKey()
+			wg.Done()
+
+			loginResp := &proto.LoginResponse{}
+			encryptedResp, err := encryption.EncryptMessage(peerKey, serverKey, loginResp)
+			if err != nil {
+				return nil, err
+			}
+
+			return &mgmtProto.EncryptedMessage{
+				WgPubKey: serverKey.PublicKey().String(),
+				Body:     encryptedResp,
+				Version:  0,
+			}, nil
+		}
+
+	info := system.GetInfo()
+	_, err = testClient.Register(*key, ValidKey, info)
+	if err != nil {
+		t.Errorf("error while trying to register client: %v", err)
+	}
+
+	wg.Wait()
+
+	expectedMeta := &proto.PeerSystemMeta{
+		Hostname:           info.Hostname,
+		GoOS:               info.GoOS,
+		Kernel:             info.Kernel,
+		Core:               info.OSVersion,
+		Platform:           info.Platform,
+		OS:                 info.OS,
+		WiretrusteeVersion: info.WiretrusteeVersion,
+	}
+
+	assert.Equal(t, ValidKey, actualValidKey)
+	assert.Equal(t, expectedMeta, actualMeta)
+}

management/client/grpc.go

@@ -0,0 +1,252 @@
+package client
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"io"
+	"time"
+
+	"github.com/cenkalti/backoff/v4"
+	log "github.com/sirupsen/logrus"
+	"github.com/wiretrustee/wiretrustee/client/system"
+	"github.com/wiretrustee/wiretrustee/encryption"
+	"github.com/wiretrustee/wiretrustee/management/proto"
+	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/connectivity"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/credentials/insecure"
+	"google.golang.org/grpc/keepalive"
+)
+
+type GrpcClient struct {
+	key        wgtypes.Key
+	realClient proto.ManagementServiceClient
+	ctx        context.Context
+	conn       *grpc.ClientConn
+}
+
+// NewClient creates a new client to Management service
+func NewClient(ctx context.Context, addr string, ourPrivateKey wgtypes.Key, tlsEnabled bool) (*GrpcClient, error) {
+
+	transportOption := grpc.WithTransportCredentials(insecure.NewCredentials())
+
+	if tlsEnabled {
+		transportOption = grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{}))
+	}
+
+	mgmCtx, cancel := context.WithTimeout(ctx, time.Second*3)
+	defer cancel()
+	conn, err := grpc.DialContext(
+		mgmCtx,
+		addr,
+		transportOption,
+		grpc.WithBlock(),
+		grpc.WithKeepaliveParams(keepalive.ClientParameters{
+			Time:    15 * time.Second,
+			Timeout: 10 * time.Second,
+		}))
+
+	if err != nil {
+		log.Errorf("failed creating connection to Management Service %v", err)
+		return nil, err
+	}
+
+	realClient := proto.NewManagementServiceClient(conn)
+
+	return &GrpcClient{
+		key:        ourPrivateKey,
+		realClient: realClient,
+		ctx:        ctx,
+		conn:       conn,
+	}, nil
+}
+
+// Close closes connection to the Management Service
+func (c *GrpcClient) Close() error {
+	return c.conn.Close()
+}
+
+//defaultBackoff is a basic backoff mechanism for general issues
+func defaultBackoff(ctx context.Context) backoff.BackOff {
+	return backoff.WithContext(&backoff.ExponentialBackOff{
+		InitialInterval:     800 * time.Millisecond,
+		RandomizationFactor: backoff.DefaultRandomizationFactor,
+		Multiplier:          backoff.DefaultMultiplier,
+		MaxInterval:         10 * time.Second,
+		MaxElapsedTime:      12 * time.Hour, //stop after 12 hours of trying, the error will be propagated to the general retry of the client
+		Stop:                backoff.Stop,
+		Clock:               backoff.SystemClock,
+	}, ctx)
+}
+
+// ready indicates whether the client is okay and ready to be used
+// for now it just checks whether gRPC connection to the service is ready
+func (c *GrpcClient) ready() bool {
+	return c.conn.GetState() == connectivity.Ready || c.conn.GetState() == connectivity.Idle
+}
+
+// Sync wraps the real client's Sync endpoint call and takes care of retries and encryption/decryption of messages
+// Blocking request. The result will be sent via msgHandler callback function
+func (c *GrpcClient) Sync(msgHandler func(msg *proto.SyncResponse) error) error {
+
+	var backOff = defaultBackoff(c.ctx)
+
+	operation := func() error {
+
+		log.Debugf("management connection state %v", c.conn.GetState())
+
+		if !c.ready() {
+			return fmt.Errorf("no connection to management")
+		}
+
+		// todo we already have it since we did the Login, maybe cache it locally?
+		serverPubKey, err := c.GetServerPublicKey()
+		if err != nil {
+			log.Errorf("failed getting Management Service public key: %s", err)
+			return err
+		}
+
+		stream, err := c.connectToStream(*serverPubKey)
+		if err != nil {
+			log.Errorf("failed to open Management Service stream: %s", err)
+			return err
+		}
+
+		log.Infof("connected to the Management Service stream")
+
+		// blocking until error
+		err = c.receiveEvents(stream, *serverPubKey, msgHandler)
+		if err != nil {
+			backOff.Reset()
+			return err
+		}
+
+		return nil
+	}
+
+	err := backoff.Retry(operation, backOff)
+	if err != nil {
+		log.Warnf("exiting Management Service connection retry loop due to unrecoverable error: %s", err)
+		return err
+	}
+
+	return nil
+}
+
+func (c *GrpcClient) connectToStream(serverPubKey wgtypes.Key) (proto.ManagementService_SyncClient, error) {
+	req := &proto.SyncRequest{}
+
+	myPrivateKey := c.key
+	myPublicKey := myPrivateKey.PublicKey()
+
+	encryptedReq, err := encryption.EncryptMessage(serverPubKey, myPrivateKey, req)
+	if err != nil {
+		log.Errorf("failed encrypting message: %s", err)
+		return nil, err
+	}
+
+	syncReq := &proto.EncryptedMessage{WgPubKey: myPublicKey.String(), Body: encryptedReq}
+	return c.realClient.Sync(c.ctx, syncReq)
+}
+
+func (c *GrpcClient) receiveEvents(stream proto.ManagementService_SyncClient, serverPubKey wgtypes.Key, msgHandler func(msg *proto.SyncResponse) error) error {
+	for {
+		update, err := stream.Recv()
+		if err == io.EOF {
+			log.Errorf("Management stream has been closed by server: %s", err)
+			return err
+		}
+		if err != nil {
+			log.Warnf("disconnected from Management Service sync stream: %v", err)
+			return err
+		}
+
+		log.Debugf("got an update message from Management Service")
+		decryptedResp := &proto.SyncResponse{}
+		err = encryption.DecryptMessage(serverPubKey, c.key, update.Body, decryptedResp)
+		if err != nil {
+			log.Errorf("failed decrypting update message from Management Service: %s", err)
+			return err
+		}
+
+		err = msgHandler(decryptedResp)
+		if err != nil {
+			log.Errorf("failed handling an update message received from Management Service: %v", err.Error())
+			return err
+		}
+	}
+}
+
+// GetServerPublicKey returns server Wireguard public key (used later for encrypting messages sent to the server)
+func (c *GrpcClient) GetServerPublicKey() (*wgtypes.Key, error) {
+	if !c.ready() {
+		return nil, fmt.Errorf("no connection to management")
+	}
+
+	mgmCtx, cancel := context.WithTimeout(c.ctx, time.Second*2)
+	defer cancel()
+	resp, err := c.realClient.GetServerKey(mgmCtx, &proto.Empty{})
+	if err != nil {
+		return nil, err
+	}
+
+	serverKey, err := wgtypes.ParseKey(resp.Key)
+	if err != nil {
+		return nil, err
+	}
+
+	return &serverKey, nil
+}
+
+func (c *GrpcClient) login(serverKey wgtypes.Key, req *proto.LoginRequest) (*proto.LoginResponse, error) {
+	if !c.ready() {
+		return nil, fmt.Errorf("no connection to management")
+	}
+	loginReq, err := encryption.EncryptMessage(serverKey, c.key, req)
+	if err != nil {
+		log.Errorf("failed to encrypt message: %s", err)
+		return nil, err
+	}
+	mgmCtx, cancel := context.WithTimeout(c.ctx, time.Second*2)
+	defer cancel()
+	resp, err := c.realClient.Login(mgmCtx, &proto.EncryptedMessage{
+		WgPubKey: c.key.PublicKey().String(),
+		Body:     loginReq,
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	loginResp := &proto.LoginResponse{}
+	err = encryption.DecryptMessage(serverKey, c.key, resp.Body, loginResp)
+	if err != nil {
+		log.Errorf("failed to decrypt registration message: %s", err)
+		return nil, err
+	}
+
+	return loginResp, nil
+}
+
+// Register registers peer on Management Server. It actually calls a Login endpoint with a provided setup key
+// Takes care of encrypting and decrypting messages.
+// This method will also collect system info and send it with the request (e.g. hostname, os, etc)
+func (c *GrpcClient) Register(serverKey wgtypes.Key, setupKey string, info *system.Info) (*proto.LoginResponse, error) {
+	meta := &proto.PeerSystemMeta{
+		Hostname:           info.Hostname,
+		GoOS:               info.GoOS,
+		OS:                 info.OS,
+		Core:               info.OSVersion,
+		Platform:           info.Platform,
+		Kernel:             info.Kernel,
+		WiretrusteeVersion: info.WiretrusteeVersion,
+	}
+	return c.login(serverKey, &proto.LoginRequest{SetupKey: setupKey, Meta: meta})
+}
+
+// Login attempts login to Management Server. Takes care of encrypting and decrypting messages.
+func (c *GrpcClient) Login(serverKey wgtypes.Key) (*proto.LoginResponse, error) {
+	return c.login(serverKey, &proto.LoginRequest{})
+}

management/client/mock.go

@@ -0,0 +1,50 @@
+package client
+
+import (
+	"github.com/wiretrustee/wiretrustee/client/system"
+	"github.com/wiretrustee/wiretrustee/management/proto"
+	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
+)
+
+type MockClient struct {
+	CloseFunc              func() error
+	SyncFunc               func(msgHandler func(msg *proto.SyncResponse) error) error
+	GetServerPublicKeyFunc func() (*wgtypes.Key, error)
+	RegisterFunc           func(serverKey wgtypes.Key, setupKey string, info *system.Info) (*proto.LoginResponse, error)
+	LoginFunc              func(serverKey wgtypes.Key) (*proto.LoginResponse, error)
+}
+
+func (m *MockClient) Close() error {
+	if m.CloseFunc == nil {
+		return nil
+	}
+	return m.CloseFunc()
+}
+
+func (m *MockClient) Sync(msgHandler func(msg *proto.SyncResponse) error) error {
+	if m.SyncFunc == nil {
+		return nil
+	}
+	return m.SyncFunc(msgHandler)
+}
+
+func (m *MockClient) GetServerPublicKey() (*wgtypes.Key, error) {
+	if m.GetServerPublicKeyFunc == nil {
+		return nil, nil
+	}
+	return m.GetServerPublicKeyFunc()
+}
+
+func (m *MockClient) Register(serverKey wgtypes.Key, setupKey string, info *system.Info) (*proto.LoginResponse, error) {
+	if m.RegisterFunc == nil {
+		return nil, nil
+	}
+	return m.RegisterFunc(serverKey, setupKey, info)
+}
+
+func (m *MockClient) Login(serverKey wgtypes.Key) (*proto.LoginResponse, error) {
+	if m.LoginFunc == nil {
+		return nil, nil
+	}
+	return m.LoginFunc(serverKey)
+}

management/cmd/management.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"github.com/wiretrustee/wiretrustee/management/server"
 	"github.com/wiretrustee/wiretrustee/management/server/http"
+	"github.com/wiretrustee/wiretrustee/management/server/idp"
 	"github.com/wiretrustee/wiretrustee/util"
 	"net"
 	"os"
@@ -68,7 +69,16 @@ var (
 				log.Fatalf("failed creating a store: %s: %v", config.Datadir, err)
 			}
 			peersUpdateManager := server.NewPeersUpdateManager()
-			accountManager := server.NewManager(store, peersUpdateManager)
+
+			var idpManager idp.Manager
+			if config.IdpManagerConfig != nil {
+				idpManager, err = idp.NewManager(*config.IdpManagerConfig)
+				if err != nil {
+					log.Fatalln("failed retrieving a new idp manager with err: ", err)
+				}
+			}
+
+			accountManager := server.NewManager(store, peersUpdateManager, idpManager)
 
 			var opts []grpc.ServerOption
 

management/proto/management.pb.go

@@ -85,6 +85,8 @@ type EncryptedMessage struct {
 	WgPubKey string `protobuf:"bytes,1,opt,name=wgPubKey,proto3" json:"wgPubKey,omitempty"`
 	// encrypted message Body
 	Body []byte `protobuf:"bytes,2,opt,name=body,proto3" json:"body,omitempty"`
+	// Version of the Wiretrustee Management Service protocol
+	Version int32 `protobuf:"varint,3,opt,name=version,proto3" json:"version,omitempty"`
 }
 
 func (x *EncryptedMessage) Reset() {
@@ -133,6 +135,13 @@ func (x *EncryptedMessage) GetBody() []byte {
 	return nil
 }
 
+func (x *EncryptedMessage) GetVersion() int32 {
+	if x != nil {
+		return x.Version
+	}
+	return 0
+}
+
 type SyncRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -178,11 +187,15 @@ type SyncResponse struct {
 	unknownFields protoimpl.UnknownFields
 
 	// Global config
-	WiretrusteeConfig *WiretrusteeConfig  `protobuf:"bytes,1,opt,name=wiretrusteeConfig,proto3" json:"wiretrusteeConfig,omitempty"`
+	WiretrusteeConfig *WiretrusteeConfig `protobuf:"bytes,1,opt,name=wiretrusteeConfig,proto3" json:"wiretrusteeConfig,omitempty"`
-	PeerConfig        *PeerConfig         `protobuf:"bytes,2,opt,name=peerConfig,proto3" json:"peerConfig,omitempty"`
+	// Deprecated. Use NetworkMap.PeerConfig
-	RemotePeers       []*RemotePeerConfig `protobuf:"bytes,3,rep,name=remotePeers,proto3" json:"remotePeers,omitempty"`
+	PeerConfig *PeerConfig `protobuf:"bytes,2,opt,name=peerConfig,proto3" json:"peerConfig,omitempty"`
+	// Deprecated. Use NetworkMap.RemotePeerConfig
+	RemotePeers []*RemotePeerConfig `protobuf:"bytes,3,rep,name=remotePeers,proto3" json:"remotePeers,omitempty"`
 	// Indicates whether remotePeers array is empty or not to bypass protobuf null and empty array equality.
-	RemotePeersIsEmpty bool `protobuf:"varint,4,opt,name=remotePeersIsEmpty,proto3" json:"remotePeersIsEmpty,omitempty"`
+	// Deprecated. Use NetworkMap.remotePeersIsEmpty
+	RemotePeersIsEmpty bool        `protobuf:"varint,4,opt,name=remotePeersIsEmpty,proto3" json:"remotePeersIsEmpty,omitempty"`
+	NetworkMap         *NetworkMap `protobuf:"bytes,5,opt,name=NetworkMap,proto3" json:"NetworkMap,omitempty"`
 }
 
 func (x *SyncResponse) Reset() {
@@ -245,6 +258,13 @@ func (x *SyncResponse) GetRemotePeersIsEmpty() bool {
 	return false
 }
 
+func (x *SyncResponse) GetNetworkMap() *NetworkMap {
+	if x != nil {
+		return x.NetworkMap
+	}
+	return nil
+}
+
 type LoginRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -464,6 +484,8 @@ type ServerKeyResponse struct {
 	Key string `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"`
 	// Key expiration timestamp after which the key should be fetched again by the client
 	ExpiresAt *timestamp.Timestamp `protobuf:"bytes,2,opt,name=expiresAt,proto3" json:"expiresAt,omitempty"`
+	// Version of the Wiretrustee Management Service protocol
+	Version int32 `protobuf:"varint,3,opt,name=version,proto3" json:"version,omitempty"`
 }
 
 func (x *ServerKeyResponse) Reset() {
@@ -512,6 +534,13 @@ func (x *ServerKeyResponse) GetExpiresAt() *timestamp.Timestamp {
 	return nil
 }
 
+func (x *ServerKeyResponse) GetVersion() int32 {
+	if x != nil {
+		return x.Version
+	}
+	return 0
+}
+
 type Empty struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -798,6 +827,84 @@ func (x *PeerConfig) GetDns() string {
 	return ""
 }
 
+// NetworkMap represents a network state of the peer with the corresponding configuration parameters to establish peer-to-peer connections
+type NetworkMap struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Serial is an ID of the network state to be used by clients to order updates.
+	// The larger the Serial the newer the configuration.
+	// E.g. the client app should keep track of this id locally and discard all the configurations with a lower value
+	Serial uint64 `protobuf:"varint,1,opt,name=Serial,proto3" json:"Serial,omitempty"`
+	// PeerConfig represents configuration of a peer
+	PeerConfig *PeerConfig `protobuf:"bytes,2,opt,name=peerConfig,proto3" json:"peerConfig,omitempty"`
+	// RemotePeerConfig represents a list of remote peers that the receiver can connect to
+	RemotePeers []*RemotePeerConfig `protobuf:"bytes,3,rep,name=remotePeers,proto3" json:"remotePeers,omitempty"`
+	// Indicates whether remotePeers array is empty or not to bypass protobuf null and empty array equality.
+	RemotePeersIsEmpty bool `protobuf:"varint,4,opt,name=remotePeersIsEmpty,proto3" json:"remotePeersIsEmpty,omitempty"`
+}
+
+func (x *NetworkMap) Reset() {
+	*x = NetworkMap{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_management_proto_msgTypes[12]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *NetworkMap) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*NetworkMap) ProtoMessage() {}
+
+func (x *NetworkMap) ProtoReflect() protoreflect.Message {
+	mi := &file_management_proto_msgTypes[12]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use NetworkMap.ProtoReflect.Descriptor instead.
+func (*NetworkMap) Descriptor() ([]byte, []int) {
+	return file_management_proto_rawDescGZIP(), []int{12}
+}
+
+func (x *NetworkMap) GetSerial() uint64 {
+	if x != nil {
+		return x.Serial
+	}
+	return 0
+}
+
+func (x *NetworkMap) GetPeerConfig() *PeerConfig {
+	if x != nil {
+		return x.PeerConfig
+	}
+	return nil
+}
+
+func (x *NetworkMap) GetRemotePeers() []*RemotePeerConfig {
+	if x != nil {
+		return x.RemotePeers
+	}
+	return nil
+}
+
+func (x *NetworkMap) GetRemotePeersIsEmpty() bool {
+	if x != nil {
+		return x.RemotePeersIsEmpty
+	}
+	return false
+}
+
 // RemotePeerConfig represents a configuration of a remote peer.
 // The properties are used to configure Wireguard Peers sections
 type RemotePeerConfig struct {
@@ -814,7 +921,7 @@ type RemotePeerConfig struct {
 func (x *RemotePeerConfig) Reset() {
 	*x = RemotePeerConfig{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_management_proto_msgTypes[12]
+		mi := &file_management_proto_msgTypes[13]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -827,7 +934,7 @@ func (x *RemotePeerConfig) String() string {
 func (*RemotePeerConfig) ProtoMessage() {}
 
 func (x *RemotePeerConfig) ProtoReflect() protoreflect.Message {
-	mi := &file_management_proto_msgTypes[12]
+	mi := &file_management_proto_msgTypes[13]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -840,7 +947,7 @@ func (x *RemotePeerConfig) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use RemotePeerConfig.ProtoReflect.Descriptor instead.
 func (*RemotePeerConfig) Descriptor() ([]byte, []int) {
-	return file_management_proto_rawDescGZIP(), []int{12}
+	return file_management_proto_rawDescGZIP(), []int{13}
 }
 
 func (x *RemotePeerConfig) GetWgPubKey() string {
@@ -864,12 +971,52 @@ var file_management_proto_rawDesc = []byte{
 	0x74, 0x6f, 0x12, 0x0a, 0x6d, 0x61, 0x6e, 0x61, 0x67, 0x65, 0x6d, 0x65, 0x6e, 0x74, 0x1a, 0x1f,
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 }
 
 var (
@@ -991,7 +1118,7 @@ func file_management_proto_rawDescGZIP() []byte {
 }
 
 var file_management_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_management_proto_msgTypes = make([]protoimpl.MessageInfo, 13)
+var file_management_proto_msgTypes = make([]protoimpl.MessageInfo, 14)
 var file_management_proto_goTypes = []interface{}{
 	(HostConfig_Protocol)(0),    // 0: management.HostConfig.Protocol
 	(*EncryptedMessage)(nil),    // 1: management.EncryptedMessage
@@ -1006,35 +1133,39 @@ var file_management_proto_goTypes = []interface{}{
 	(*HostConfig)(nil),          // 10: management.HostConfig
 	(*ProtectedHostConfig)(nil), // 11: management.ProtectedHostConfig
 	(*PeerConfig)(nil),          // 12: management.PeerConfig
-	(*RemotePeerConfig)(nil),    // 13: management.RemotePeerConfig
+	(*NetworkMap)(nil),          // 13: management.NetworkMap
-	(*timestamp.Timestamp)(nil), // 14: google.protobuf.Timestamp
+	(*RemotePeerConfig)(nil),    // 14: management.RemotePeerConfig
+	(*timestamp.Timestamp)(nil), // 15: google.protobuf.Timestamp
 }
 var file_management_proto_depIdxs = []int32{
 	9,  // 0: management.SyncResponse.wiretrusteeConfig:type_name -> management.WiretrusteeConfig
 	12, // 1: management.SyncResponse.peerConfig:type_name -> management.PeerConfig
-	13, // 2: management.SyncResponse.remotePeers:type_name -> management.RemotePeerConfig
+	14, // 2: management.SyncResponse.remotePeers:type_name -> management.RemotePeerConfig
-	5,  // 3: management.LoginRequest.meta:type_name -> management.PeerSystemMeta
+	13, // 3: management.SyncResponse.NetworkMap:type_name -> management.NetworkMap
-	9,  // 4: management.LoginResponse.wiretrusteeConfig:type_name -> management.WiretrusteeConfig
+	5,  // 4: management.LoginRequest.meta:type_name -> management.PeerSystemMeta
-	12, // 5: management.LoginResponse.peerConfig:type_name -> management.PeerConfig
+	9,  // 5: management.LoginResponse.wiretrusteeConfig:type_name -> management.WiretrusteeConfig
-	14, // 6: management.ServerKeyResponse.expiresAt:type_name -> google.protobuf.Timestamp
+	12, // 6: management.LoginResponse.peerConfig:type_name -> management.PeerConfig
-	10, // 7: management.WiretrusteeConfig.stuns:type_name -> management.HostConfig
+	15, // 7: management.ServerKeyResponse.expiresAt:type_name -> google.protobuf.Timestamp
-	11, // 8: management.WiretrusteeConfig.turns:type_name -> management.ProtectedHostConfig
+	10, // 8: management.WiretrusteeConfig.stuns:type_name -> management.HostConfig
-	10, // 9: management.WiretrusteeConfig.signal:type_name -> management.HostConfig
+	11, // 9: management.WiretrusteeConfig.turns:type_name -> management.ProtectedHostConfig
-	0,  // 10: management.HostConfig.protocol:type_name -> management.HostConfig.Protocol
+	10, // 10: management.WiretrusteeConfig.signal:type_name -> management.HostConfig
-	10, // 11: management.ProtectedHostConfig.hostConfig:type_name -> management.HostConfig
+	0,  // 11: management.HostConfig.protocol:type_name -> management.HostConfig.Protocol
-	1,  // 12: management.ManagementService.Login:input_type -> management.EncryptedMessage
+	10, // 12: management.ProtectedHostConfig.hostConfig:type_name -> management.HostConfig
-	1,  // 13: management.ManagementService.Sync:input_type -> management.EncryptedMessage
+	12, // 13: management.NetworkMap.peerConfig:type_name -> management.PeerConfig
-	8,  // 14: management.ManagementService.GetServerKey:input_type -> management.Empty
+	14, // 14: management.NetworkMap.remotePeers:type_name -> management.RemotePeerConfig
-	8,  // 15: management.ManagementService.isHealthy:input_type -> management.Empty
+	1,  // 15: management.ManagementService.Login:input_type -> management.EncryptedMessage
-	1,  // 16: management.ManagementService.Login:output_type -> management.EncryptedMessage
+	1,  // 16: management.ManagementService.Sync:input_type -> management.EncryptedMessage
-	1,  // 17: management.ManagementService.Sync:output_type -> management.EncryptedMessage
+	8,  // 17: management.ManagementService.GetServerKey:input_type -> management.Empty
-	7,  // 18: management.ManagementService.GetServerKey:output_type -> management.ServerKeyResponse
+	8,  // 18: management.ManagementService.isHealthy:input_type -> management.Empty
-	8,  // 19: management.ManagementService.isHealthy:output_type -> management.Empty
+	1,  // 19: management.ManagementService.Login:output_type -> management.EncryptedMessage
-	16, // [16:20] is the sub-list for method output_type
+	1,  // 20: management.ManagementService.Sync:output_type -> management.EncryptedMessage
-	12, // [12:16] is the sub-list for method input_type
+	7,  // 21: management.ManagementService.GetServerKey:output_type -> management.ServerKeyResponse
-	12, // [12:12] is the sub-list for extension type_name
+	8,  // 22: management.ManagementService.isHealthy:output_type -> management.Empty
-	12, // [12:12] is the sub-list for extension extendee
+	19, // [19:23] is the sub-list for method output_type
-	0,  // [0:12] is the sub-list for field type_name
+	15, // [15:19] is the sub-list for method input_type
+	15, // [15:15] is the sub-list for extension type_name
+	15, // [15:15] is the sub-list for extension extendee
+	0,  // [0:15] is the sub-list for field type_name
 }
 
 func init() { file_management_proto_init() }
@@ -1188,6 +1319,18 @@ func file_management_proto_init() {
 			}
 		}
 		file_management_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*NetworkMap); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_management_proto_msgTypes[13].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*RemotePeerConfig); i {
 			case 0:
 				return &v.state
@@ -1206,7 +1349,7 @@ func file_management_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_management_proto_rawDesc,
 			NumEnums:      1,
-			NumMessages:   13,
+			NumMessages:   14,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

management/proto/management.proto

@@ -9,11 +9,13 @@ package management;
 service ManagementService {
 
   // Login logs in peer. In case server returns codes.PermissionDenied this endpoint can be used to register Peer providing LoginRequest.setupKey
+  // Returns encrypted LoginResponse in EncryptedMessage.Body
   rpc Login(EncryptedMessage) returns (EncryptedMessage) {}
 
   // Sync enables peer synchronization. Each peer that is connected to this stream will receive updates from the server.
   // For example, if a new peer has been added to an account all other connected peers will receive this peer's Wireguard public key as an update
   // The initial SyncResponse contains all of the available peers so the local state can be refreshed
+  // Returns encrypted SyncResponse in EncryptedMessage.Body
   rpc Sync(EncryptedMessage) returns (stream EncryptedMessage) {}
 
   // Exposes a Wireguard public key of the Management service.
@@ -30,20 +32,29 @@ message EncryptedMessage {
 
   // encrypted message Body
   bytes body = 2;
+  // Version of the Wiretrustee Management Service protocol
+  int32 version = 3;
 }
 
 message SyncRequest {}
 
 // SyncResponse represents a state that should be applied to the local peer (e.g. Wiretrustee servers config as well as local peer and remote peers configs)
 message SyncResponse {
+
   // Global config
   WiretrusteeConfig wiretrusteeConfig = 1;
 
+  // Deprecated. Use NetworkMap.PeerConfig
   PeerConfig peerConfig = 2;
 
+  // Deprecated. Use NetworkMap.RemotePeerConfig
   repeated RemotePeerConfig remotePeers = 3;
+
   // Indicates whether remotePeers array is empty or not to bypass protobuf null and empty array equality.
+  // Deprecated. Use NetworkMap.remotePeersIsEmpty
   bool remotePeersIsEmpty = 4;
+
+  NetworkMap NetworkMap = 5;
 }
 
 message LoginRequest {
@@ -76,6 +87,8 @@ message ServerKeyResponse {
   string key = 1;
   // Key expiration timestamp after which the key should be fetched again by the client
   google.protobuf.Timestamp expiresAt = 2;
+  // Version of the Wiretrustee Management Service protocol
+  int32 version = 3;
 }
 
 message Empty {}
@@ -122,6 +135,24 @@ message PeerConfig {
   string dns = 2;
 }
 
+// NetworkMap represents a network state of the peer with the corresponding configuration parameters to establish peer-to-peer connections
+message NetworkMap {
+  // Serial is an ID of the network state to be used by clients to order updates.
+  // The larger the Serial the newer the configuration.
+  // E.g. the client app should keep track of this id locally and discard all the configurations with a lower value
+  uint64 Serial = 1;
+
+  // PeerConfig represents configuration of a peer
+  PeerConfig peerConfig = 2;
+
+  // RemotePeerConfig represents a list of remote peers that the receiver can connect to
+  repeated RemotePeerConfig remotePeers = 3;
+
+  // Indicates whether remotePeers array is empty or not to bypass protobuf null and empty array equality.
+  bool remotePeersIsEmpty = 4;
+
+}
+
 // RemotePeerConfig represents a configuration of a remote peer.
 // The properties are used to configure Wireguard Peers sections
 message RemotePeerConfig {

management/server/account.go

@@ -1,13 +1,12 @@
 package server
 
 import (
-	"github.com/google/uuid"
 	"github.com/rs/xid"
 	log "github.com/sirupsen/logrus"
+	"github.com/wiretrustee/wiretrustee/management/server/idp"
 	"github.com/wiretrustee/wiretrustee/util"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
-	"net"
 	"sync"
 )
 
@@ -16,6 +15,7 @@ type AccountManager struct {
 	// mutex to synchronise account operations (e.g. generating Peer IP address inside the Network)
 	mux                sync.Mutex
 	peersUpdateManager *PeersUpdateManager
+	idpManager         idp.Manager
 }
 
 // Account represents a unique account of the system
@@ -23,12 +23,19 @@ type Account struct {
 	Id string
 	// User.Id it was created by
 	CreatedBy string
+	Domain    string
 	SetupKeys map[string]*SetupKey
 	Network   *Network
 	Peers     map[string]*Peer
 	Users     map[string]*User
 }
 
+// NewAccount creates a new Account with a generated ID and generated default setup keys
+func NewAccount(userId, domain string) *Account {
+	accountId := xid.New().String()
+	return newAccountWithId(accountId, userId, domain)
+}
+
 func (a *Account) Copy() *Account {
 	peers := map[string]*Peer{}
 	for id, peer := range a.Peers {
@@ -56,11 +63,12 @@ func (a *Account) Copy() *Account {
 }
 
 // NewManager creates a new AccountManager with a provided Store
-func NewManager(store Store, peersUpdateManager *PeersUpdateManager) *AccountManager {
+func NewManager(store Store, peersUpdateManager *PeersUpdateManager, idpManager idp.Manager) *AccountManager {
 	return &AccountManager{
 		Store:              store,
 		mux:                sync.Mutex{},
 		peersUpdateManager: peersUpdateManager,
+		idpManager:         idpManager,
 	}
 }
 
@@ -142,8 +150,8 @@ func (am *AccountManager) RenameSetupKey(accountId string, keyId string, newName
 	return keyCopy, nil
 }
 
-//GetAccount returns an existing account or error (NotFound) if doesn't exist
+//GetAccountById returns an existing account using its ID or error (NotFound) if doesn't exist
-func (am *AccountManager) GetAccount(accountId string) (*Account, error) {
+func (am *AccountManager) GetAccountById(accountId string) (*Account, error) {
 	am.mux.Lock()
 	defer am.mux.Unlock()
 
@@ -155,6 +163,30 @@ func (am *AccountManager) GetAccount(accountId string) (*Account, error) {
 	return account, nil
 }
 
+//GetAccountByUserOrAccountId look for an account by user or account Id, if no account is provided and
+// user id doesn't have an account associated with it, one account is created
+func (am *AccountManager) GetAccountByUserOrAccountId(userId, accountId, domain string) (*Account, error) {
+
+	if accountId != "" {
+		return am.GetAccountById(accountId)
+	} else if userId != "" {
+		account, err := am.GetOrCreateAccountByUser(userId, domain)
+		if err != nil {
+			return nil, status.Errorf(codes.NotFound, "account not found using user id: %s", userId)
+		}
+		// update idp manager app metadata
+		if am.idpManager != nil {
+			err = am.idpManager.UpdateUserAppMetadata(userId, idp.AppMetadata{WTAccountId: account.Id})
+			if err != nil {
+				return nil, status.Errorf(codes.Internal, "updating user's app metadata failed with: %v", err)
+			}
+		}
+		return account, nil
+	}
+
+	return nil, status.Errorf(codes.NotFound, "no valid user or account Id provided")
+}
+
 //AccountExists checks whether account exists (returns true) or not (returns false)
 func (am *AccountManager) AccountExists(accountId string) (*bool, error) {
 	am.mux.Lock()
@@ -176,17 +208,17 @@ func (am *AccountManager) AccountExists(accountId string) (*bool, error) {
 }
 
 // AddAccount generates a new Account with a provided accountId and userId, saves to the Store
-func (am *AccountManager) AddAccount(accountId string, userId string) (*Account, error) {
+func (am *AccountManager) AddAccount(accountId, userId, domain string) (*Account, error) {
 
 	am.mux.Lock()
 	defer am.mux.Unlock()
 
-	return am.createAccount(accountId, userId)
+	return am.createAccount(accountId, userId, domain)
 
 }
 
-func (am *AccountManager) createAccount(accountId string, userId string) (*Account, error) {
+func (am *AccountManager) createAccount(accountId, userId, domain string) (*Account, error) {
-	account, _ := newAccountWithId(accountId, userId)
+	account := newAccountWithId(accountId, userId, domain)
 
 	err := am.Store.SaveAccount(account)
 	if err != nil {
@@ -197,7 +229,7 @@ func (am *AccountManager) createAccount(accountId string, userId string) (*Accou
 }
 
 // newAccountWithId creates a new Account with a default SetupKey (doesn't store in a Store) and provided id
-func newAccountWithId(accountId string, userId string) (*Account, *SetupKey) {
+func newAccountWithId(accountId, userId, domain string) *Account {
 
 	log.Debugf("creating new account")
 
@@ -206,22 +238,21 @@ func newAccountWithId(accountId string, userId string) (*Account, *SetupKey) {
 	oneOffKey := GenerateSetupKey("One-off key", SetupKeyOneOff, DefaultSetupKeyDuration)
 	setupKeys[defaultKey.Key] = defaultKey
 	setupKeys[oneOffKey.Key] = oneOffKey
-	network := &Network{
+	network := NewNetwork()
-		Id:  uuid.New().String(),
-		Net: net.IPNet{IP: net.ParseIP("100.64.0.0"), Mask: net.IPMask{255, 192, 0, 0}},
-		Dns: ""}
 	peers := make(map[string]*Peer)
 	users := make(map[string]*User)
 
 	log.Debugf("created new account %s with setup key %s", accountId, defaultKey.Key)
 
-	return &Account{Id: accountId, SetupKeys: setupKeys, Network: network, Peers: peers, Users: users, CreatedBy: userId}, defaultKey
+	return &Account{
-}
+		Id:        accountId,
-
+		SetupKeys: setupKeys,
-// newAccount creates a new Account with a default SetupKey and a provided User.Id of a user who issued account creation (doesn't store in a Store)
+		Network:   network,
-func newAccount(userId string) (*Account, *SetupKey) {
+		Peers:     peers,
-	accountId := xid.New().String()
+		Users:     users,
-	return newAccountWithId(accountId, userId)
+		CreatedBy: userId,
+		Domain:    domain,
+	}
 }
 
 func getAccountSetupKeyById(acc *Account, keyId string) *SetupKey {

management/server/account_test.go

@@ -14,7 +14,7 @@ func TestAccountManager_GetOrCreateAccountByUser(t *testing.T) {
 	}
 
 	userId := "test_user"
-	account, err := manager.GetOrCreateAccountByUser(userId)
+	account, err := manager.GetOrCreateAccountByUser(userId, "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -32,6 +32,43 @@ func TestAccountManager_GetOrCreateAccountByUser(t *testing.T) {
 	}
 }
 
+func TestAccountManager_SetOrUpdateDomain(t *testing.T) {
+	manager, err := createManager(t)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	userId := "test_user"
+	domain := "hotmail.com"
+	account, err := manager.GetOrCreateAccountByUser(userId, domain)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if account == nil {
+		t.Fatalf("expected to create an account for a user %s", userId)
+	}
+
+	if account.Domain != domain {
+		t.Errorf("setting account domain failed, expected %s, got %s", domain, account.Domain)
+	}
+
+	domain = "gmail.com"
+
+	account, err = manager.GetOrCreateAccountByUser(userId, domain)
+	if err != nil {
+		t.Fatalf("got the following error while retrieving existing acc: %v", err)
+	}
+
+	if account == nil {
+		t.Fatalf("expected to get an account for a user %s", userId)
+	}
+
+	if account.Domain != domain {
+		t.Errorf("updating domain. expected %s got %s", domain, account.Domain)
+	}
+}
+
 func TestAccountManager_AddAccount(t *testing.T) {
 	manager, err := createManager(t)
 	if err != nil {
@@ -48,7 +85,7 @@ func TestAccountManager_AddAccount(t *testing.T) {
 		Mask: net.IPMask{255, 192, 0, 0},
 	}
 
-	account, err := manager.AddAccount(expectedId, userId)
+	account, err := manager.AddAccount(expectedId, userId, "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -70,6 +107,36 @@ func TestAccountManager_AddAccount(t *testing.T) {
 	}
 }
 
+func TestAccountManager_GetAccountByUserOrAccountId(t *testing.T) {
+	manager, err := createManager(t)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	userId := "test_user"
+
+	account, err := manager.GetAccountByUserOrAccountId(userId, "", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if account == nil {
+		t.Fatalf("expected to create an account for a user %s", userId)
+	}
+
+	accountId := account.Id
+
+	_, err = manager.GetAccountByUserOrAccountId("", accountId, "")
+	if err != nil {
+		t.Errorf("expected to get existing account after creation using userid, no account was found for a account %s", accountId)
+	}
+
+	_, err = manager.GetAccountByUserOrAccountId("", "", "")
+	if err == nil {
+		t.Errorf("expected an error when user and account IDs are empty")
+	}
+}
+
 func TestAccountManager_AccountExists(t *testing.T) {
 	manager, err := createManager(t)
 	if err != nil {
@@ -79,7 +146,7 @@ func TestAccountManager_AccountExists(t *testing.T) {
 
 	expectedId := "test_account"
 	userId := "account_creator"
-	_, err = manager.AddAccount(expectedId, userId)
+	_, err = manager.AddAccount(expectedId, userId, "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -104,13 +171,13 @@ func TestAccountManager_GetAccount(t *testing.T) {
 
 	expectedId := "test_account"
 	userId := "account_creator"
-	account, err := manager.AddAccount(expectedId, userId)
+	account, err := manager.AddAccount(expectedId, userId, "")
 	if err != nil {
 		t.Fatal(err)
 	}
 
 	//AddAccount has been already tested so we can assume it is correct and compare results
-	getAccount, err := manager.GetAccount(expectedId)
+	getAccount, err := manager.GetAccountById(expectedId)
 	if err != nil {
 		t.Fatal(err)
 		return
@@ -141,11 +208,13 @@ func TestAccountManager_AddPeer(t *testing.T) {
 		return
 	}
 
-	account, err := manager.AddAccount("test_account", "account_creator")
+	account, err := manager.AddAccount("test_account", "account_creator", "")
 	if err != nil {
 		t.Fatal(err)
 	}
 
+	serial := account.Network.Serial() //should be 0
+
 	var setupKey *SetupKey
 	for _, key := range account.SetupKeys {
 		setupKey = key
@@ -156,7 +225,12 @@ func TestAccountManager_AddPeer(t *testing.T) {
 		return
 	}
 
-	key, err := wgtypes.GenerateKey()
+	if account.Network.serial != 0 {
+		t.Errorf("expecting account network to have an initial serial=0")
+		return
+	}
+
+	key, err := wgtypes.GeneratePrivateKey()
 	if err != nil {
 		t.Fatal(err)
 		return
@@ -164,7 +238,7 @@ func TestAccountManager_AddPeer(t *testing.T) {
 	expectedPeerKey := key.PublicKey().String()
 	expectedPeerIP := "100.64.0.1"
 
-	peer, err := manager.AddPeer(setupKey.Key, Peer{
+	peer, err := manager.AddPeer(setupKey.Key, &Peer{
 		Key:  expectedPeerKey,
 		Meta: PeerSystemMeta{},
 		Name: expectedPeerKey,
@@ -174,6 +248,12 @@ func TestAccountManager_AddPeer(t *testing.T) {
 		return
 	}
 
+	account, err = manager.GetAccountById(account.Id)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
 	if peer.Key != expectedPeerKey {
 		t.Errorf("expecting just added peer to have key = %s, got %s", expectedPeerKey, peer.Key)
 	}
@@ -182,13 +262,70 @@ func TestAccountManager_AddPeer(t *testing.T) {
 		t.Errorf("expecting just added peer to have IP = %s, got %s", expectedPeerIP, peer.IP.String())
 	}
 
+	if account.Network.Serial() != 1 {
+		t.Errorf("expecting Network serial=%d to be incremented by 1 and be equal to %d when adding new peer to account", serial, account.Network.Serial())
+	}
+
 }
+
+func TestAccountManager_DeletePeer(t *testing.T) {
+	manager, err := createManager(t)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	account, err := manager.AddAccount("test_account", "account_creator", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var setupKey *SetupKey
+	for _, key := range account.SetupKeys {
+		setupKey = key
+	}
+
+	key, err := wgtypes.GenerateKey()
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	peerKey := key.PublicKey().String()
+
+	_, err = manager.AddPeer(setupKey.Key, &Peer{
+		Key:  peerKey,
+		Meta: PeerSystemMeta{},
+		Name: peerKey,
+	})
+	if err != nil {
+		t.Errorf("expecting peer to be added, got failure %v", err)
+		return
+	}
+
+	_, err = manager.DeletePeer(account.Id, peerKey)
+	if err != nil {
+		return
+	}
+
+	account, err = manager.GetAccountById(account.Id)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	if account.Network.Serial() != 2 {
+		t.Errorf("expecting Network serial=%d to be incremented and be equal to 2 after adding and deleteing a peer", account.Network.Serial())
+	}
+
+}
+
 func createManager(t *testing.T) (*AccountManager, error) {
 	store, err := createStore(t)
 	if err != nil {
 		return nil, err
 	}
-	return NewManager(store, NewPeersUpdateManager()), nil
+	return NewManager(store, NewPeersUpdateManager(), nil), nil
 }
 
 func createStore(t *testing.T) (Store, error) {

management/server/config.go

@@ -1,6 +1,7 @@
 package server
 
 import (
+	"github.com/wiretrustee/wiretrustee/management/server/idp"
 	"github.com/wiretrustee/wiretrustee/util"
 )
 
@@ -23,6 +24,8 @@ type Config struct {
 	Datadir string
 
 	HttpConfig *HttpServerConfig
+
+	IdpManagerConfig *idp.Config
 }
 
 // TURNConfig is a config of the TURNCredentialsManager

management/server/file_store_test.go

@@ -32,7 +32,7 @@ func TestNewStore(t *testing.T) {
 func TestSaveAccount(t *testing.T) {
 	store := newStore(t)
 
-	account, _ := newAccount("testuser")
+	account := NewAccount("testuser", "")
 	account.Users["testuser"] = NewAdminUser("testuser")
 	setupKey := GenerateDefaultSetupKey()
 	account.SetupKeys[setupKey.Key] = setupKey
@@ -72,7 +72,7 @@ func TestSaveAccount(t *testing.T) {
 func TestStore(t *testing.T) {
 	store := newStore(t)
 
-	account, _ := newAccount("testuser")
+	account := NewAccount("testuser", "")
 	account.Users["testuser"] = NewAdminUser("testuser")
 	account.Peers["testpeer"] = &Peer{
 		Key:      "peerkey",

management/server/grpcserver.go

@@ -141,7 +141,7 @@ func (s *Server) registerPeer(peerKey wgtypes.Key, req *proto.LoginRequest) (*Pe
 	if meta == nil {
 		return nil, status.Errorf(codes.InvalidArgument, "peer meta data was not provided")
 	}
-	peer, err := s.accountManager.AddPeer(req.GetSetupKey(), Peer{
+	peer, err := s.accountManager.AddPeer(req.GetSetupKey(), &Peer{
 		Key:  peerKey.String(),
 		Name: meta.GetHostname(),
 		Meta: PeerSystemMeta{
@@ -158,21 +158,22 @@ func (s *Server) registerPeer(peerKey wgtypes.Key, req *proto.LoginRequest) (*Pe
 		return nil, status.Errorf(codes.NotFound, "provided setup key doesn't exists")
 	}
 
-	peers, err := s.accountManager.GetPeersForAPeer(peer.Key)
+	//todo move to AccountManager the code below
+	networkMap, err := s.accountManager.GetNetworkMap(peer.Key)
 	if err != nil {
 		return nil, status.Error(codes.Internal, "internal server error")
 	}
 
 	// notify other peers of our registration
-	for _, remotePeer := range peers {
+	for _, remotePeer := range networkMap.Peers {
 		// exclude notified peer and add ourselves
 		peersToSend := []*Peer{peer}
-		for _, p := range peers {
+		for _, p := range networkMap.Peers {
 			if remotePeer.Key != p.Key {
 				peersToSend = append(peersToSend, p)
 			}
 		}
-		update := toSyncResponse(s.config, peer, peersToSend, nil)
+		update := toSyncResponse(s.config, peer, peersToSend, nil, networkMap.Network.Serial())
 		err = s.peersUpdateManager.SendUpdate(remotePeer.Key, &UpdateMessage{Update: update})
 		if err != nil {
 			// todo rethink if we should keep this return
@@ -317,7 +318,7 @@ func toRemotePeerConfig(peers []*Peer) []*proto.RemotePeerConfig {
 
 }
 
-func toSyncResponse(config *Config, peer *Peer, peers []*Peer, turnCredentials *TURNCredentials) *proto.SyncResponse {
+func toSyncResponse(config *Config, peer *Peer, peers []*Peer, turnCredentials *TURNCredentials, serial uint64) *proto.SyncResponse {
 
 	wtConfig := toWiretrusteeConfig(config, turnCredentials)
 
@@ -330,6 +331,12 @@ func toSyncResponse(config *Config, peer *Peer, peers []*Peer, turnCredentials *
 		PeerConfig:         pConfig,
 		RemotePeers:        remotePeers,
 		RemotePeersIsEmpty: len(remotePeers) == 0,
+		NetworkMap: &proto.NetworkMap{
+			Serial:             serial,
+			PeerConfig:         pConfig,
+			RemotePeers:        remotePeers,
+			RemotePeersIsEmpty: len(remotePeers) == 0,
+		},
 	}
 }
 
@@ -341,7 +348,7 @@ func (s *Server) IsHealthy(ctx context.Context, req *proto.Empty) (*proto.Empty,
 // sendInitialSync sends initial proto.SyncResponse to the peer requesting synchronization
 func (s *Server) sendInitialSync(peerKey wgtypes.Key, peer *Peer, srv proto.ManagementService_SyncServer) error {
 
-	peers, err := s.accountManager.GetPeersForAPeer(peer.Key)
+	networkMap, err := s.accountManager.GetNetworkMap(peer.Key)
 	if err != nil {
 		log.Warnf("error getting a list of peers for a peer %s", peer.Key)
 		return err
@@ -355,7 +362,7 @@ func (s *Server) sendInitialSync(peerKey wgtypes.Key, peer *Peer, srv proto.Mana
 	} else {
 		turnCredentials = nil
 	}
-	plainResp := toSyncResponse(s.config, peer, peers, turnCredentials)
+	plainResp := toSyncResponse(s.config, peer, networkMap.Peers, turnCredentials, networkMap.Network.Serial())
 
 	encryptedResp, err := encryption.EncryptMessage(peerKey, s.wgKey, plainResp)
 	if err != nil {

management/server/http/handler/peers.go

@@ -13,6 +13,7 @@ import (
 //Peers is a handler that returns peers of the account
 type Peers struct {
 	accountManager *server.AccountManager
+	authAudience   string
 }
 
 //PeerResponse is a response sent to the client
@@ -22,6 +23,7 @@ type PeerResponse struct {
 	Connected bool
 	LastSeen  time.Time
 	OS        string
+	Version   string
 }
 
 //PeerRequest is a request sent by the client
@@ -29,9 +31,10 @@ type PeerRequest struct {
 	Name string
 }
 
-func NewPeers(accountManager *server.AccountManager) *Peers {
+func NewPeers(accountManager *server.AccountManager, authAudience string) *Peers {
 	return &Peers{
 		accountManager: accountManager,
+		authAudience:   authAudience,
 	}
 }
 
@@ -61,11 +64,21 @@ func (h *Peers) deletePeer(accountId string, peer *server.Peer, w http.ResponseW
 	writeJSONObject(w, "")
 }
 
-func (h *Peers) HandlePeer(w http.ResponseWriter, r *http.Request) {
+func (h *Peers) getPeerAccount(r *http.Request) (*server.Account, error) {
-	userId := extractUserIdFromRequestContext(r)
+	jwtClaims := extractClaimsFromRequestContext(r, h.authAudience)
-	account, err := h.accountManager.GetOrCreateAccountByUser(userId)
+
+	account, err := h.accountManager.GetAccountByUserOrAccountId(jwtClaims.UserId, jwtClaims.AccountId, jwtClaims.Domain)
 	if err != nil {
-		log.Errorf("failed getting account of a user %s: %v", userId, err)
+		return nil, fmt.Errorf("failed getting account of a user %s: %v", jwtClaims.UserId, err)
+	}
+
+	return account, nil
+}
+
+func (h *Peers) HandlePeer(w http.ResponseWriter, r *http.Request) {
+	account, err := h.getPeerAccount(r)
+	if err != nil {
+		log.Error(err)
 		http.Redirect(w, r, "/", http.StatusInternalServerError)
 		return
 	}
@@ -102,11 +115,9 @@ func (h *Peers) HandlePeer(w http.ResponseWriter, r *http.Request) {
 func (h *Peers) GetPeers(w http.ResponseWriter, r *http.Request) {
 	switch r.Method {
 	case http.MethodGet:
-		userId := extractUserIdFromRequestContext(r)
+		account, err := h.getPeerAccount(r)
-		//new user -> create a new account
-		account, err := h.accountManager.GetOrCreateAccountByUser(userId)
 		if err != nil {
-			log.Errorf("failed getting account of a user %s: %v", userId, err)
+			log.Error(err)
 			http.Redirect(w, r, "/", http.StatusInternalServerError)
 			return
 		}
@@ -129,5 +140,6 @@ func toPeerResponse(peer *server.Peer) *PeerResponse {
 		Connected: peer.Status.Connected,
 		LastSeen:  peer.Status.LastSeen,
 		OS:        fmt.Sprintf("%s %s", peer.Meta.OS, peer.Meta.Core),
+		Version:   peer.Meta.WtVersion,
 	}
 }

management/server/http/handler/setupkeys.go

@@ -2,6 +2,7 @@ package handler
 
 import (
 	"encoding/json"
+	"fmt"
 	"github.com/gorilla/mux"
 	log "github.com/sirupsen/logrus"
 	"github.com/wiretrustee/wiretrustee/management/server"
@@ -15,6 +16,7 @@ import (
 // SetupKeys is a handler that returns a list of setup keys of the account
 type SetupKeys struct {
 	accountManager *server.AccountManager
+	authAudience   string
 }
 
 // SetupKeyResponse is a response sent to the client
@@ -39,9 +41,10 @@ type SetupKeyRequest struct {
 	Revoked   bool
 }
 
-func NewSetupKeysHandler(accountManager *server.AccountManager) *SetupKeys {
+func NewSetupKeysHandler(accountManager *server.AccountManager, authAudience string) *SetupKeys {
 	return &SetupKeys{
 		accountManager: accountManager,
+		authAudience:   authAudience,
 	}
 }
 
@@ -76,7 +79,7 @@ func (h *SetupKeys) updateKey(accountId string, keyId string, w http.ResponseWri
 }
 
 func (h *SetupKeys) getKey(accountId string, keyId string, w http.ResponseWriter, r *http.Request) {
-	account, err := h.accountManager.GetAccount(accountId)
+	account, err := h.accountManager.GetAccountById(accountId)
 	if err != nil {
 		http.Error(w, "account doesn't exist", http.StatusInternalServerError)
 		return
@@ -117,11 +120,21 @@ func (h *SetupKeys) createKey(accountId string, w http.ResponseWriter, r *http.R
 	writeSuccess(w, setupKey)
 }
 
-func (h *SetupKeys) HandleKey(w http.ResponseWriter, r *http.Request) {
+func (h *SetupKeys) getSetupKeyAccount(r *http.Request) (*server.Account, error) {
-	userId := extractUserIdFromRequestContext(r)
+	jwtClaims := extractClaimsFromRequestContext(r, h.authAudience)
-	account, err := h.accountManager.GetOrCreateAccountByUser(userId)
+
+	account, err := h.accountManager.GetAccountByUserOrAccountId(jwtClaims.UserId, jwtClaims.AccountId, jwtClaims.Domain)
 	if err != nil {
-		log.Errorf("failed getting account of a user %s: %v", userId, err)
+		return nil, fmt.Errorf("failed getting account of a user %s: %v", jwtClaims.UserId, err)
+	}
+
+	return account, nil
+}
+
+func (h *SetupKeys) HandleKey(w http.ResponseWriter, r *http.Request) {
+	account, err := h.getSetupKeyAccount(r)
+	if err != nil {
+		log.Error(err)
 		http.Redirect(w, r, "/", http.StatusInternalServerError)
 		return
 	}
@@ -147,11 +160,9 @@ func (h *SetupKeys) HandleKey(w http.ResponseWriter, r *http.Request) {
 
 func (h *SetupKeys) GetKeys(w http.ResponseWriter, r *http.Request) {
 
-	userId := extractUserIdFromRequestContext(r)
+	account, err := h.getSetupKeyAccount(r)
-	//new user -> create a new account
-	account, err := h.accountManager.GetOrCreateAccountByUser(userId)
 	if err != nil {
-		log.Errorf("failed getting account of a user %s: %v", userId, err)
+		log.Error(err)
 		http.Redirect(w, r, "/", http.StatusInternalServerError)
 		return
 	}

management/server/http/handler/util.go

@@ -8,13 +8,28 @@ import (
 	"time"
 )
 
-// extractUserIdFromRequestContext extracts accountId from the request context previously filled by the JWT token (after auth)
+// JWTClaims stores information from JWTs
-func extractUserIdFromRequestContext(r *http.Request) string {
+type JWTClaims struct {
+	UserId    string
+	AccountId string
+	Domain    string
+}
+
+// extractClaimsFromRequestContext extracts claims from the request context previously filled by the JWT token (after auth)
+func extractClaimsFromRequestContext(r *http.Request, authAudiance string) JWTClaims {
 	token := r.Context().Value("user").(*jwt.Token)
 	claims := token.Claims.(jwt.MapClaims)
-
+	jwtClaims := JWTClaims{}
-	//actually a user id but for now we have a 1 to 1 mapping.
+	jwtClaims.UserId = claims["sub"].(string)
-	return claims["sub"].(string)
+	accountIdClaim, ok := claims[authAudiance+"wt_account_id"]
+	if ok {
+		jwtClaims.AccountId = accountIdClaim.(string)
+	}
+	domainClaim, ok := claims[authAudiance+"wt_user_domain"]
+	if ok {
+		jwtClaims.Domain = domainClaim.(string)
+	}
+	return jwtClaims
 }
 
 //writeJSONObject simply writes object to the HTTP reponse in JSON format

management/server/http/server.go

@@ -73,8 +73,8 @@ func (s *Server) Start() error {
 	r := mux.NewRouter()
 	r.Use(jwtMiddleware.Handler, corsMiddleware.Handler)
 
-	peersHandler := handler.NewPeers(s.accountManager)
+	peersHandler := handler.NewPeers(s.accountManager, s.config.AuthAudience)
-	keysHandler := handler.NewSetupKeysHandler(s.accountManager)
+	keysHandler := handler.NewSetupKeysHandler(s.accountManager, s.config.AuthAudience)
 	r.HandleFunc("/api/peers", peersHandler.GetPeers).Methods("GET", "OPTIONS")
 	r.HandleFunc("/api/peers/{id}", peersHandler.HandlePeer).Methods("GET", "PUT", "DELETE", "OPTIONS")
 

management/server/idp/auth0.go

@@ -0,0 +1,207 @@
+package idp
+
+import (
+	"encoding/json"
+	"fmt"
+	"github.com/golang-jwt/jwt"
+	log "github.com/sirupsen/logrus"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"strings"
+	"sync"
+	"time"
+)
+
+// Auth0Manager auth0 manager client instance
+type Auth0Manager struct {
+	authIssuer  string
+	httpClient  ManagerHTTPClient
+	credentials ManagerCredentials
+	helper      ManagerHelper
+}
+
+// Auth0ClientConfig auth0 manager client configurations
+type Auth0ClientConfig struct {
+	Audience     string `json:"audiance"`
+	AuthIssuer   string `json:"auth_issuer"`
+	ClientId     string `json:"client_id"`
+	ClientSecret string `json:"client_secret"`
+	GrantType    string `json:"grant_type"`
+}
+
+// Auth0Credentials auth0 authentication information
+type Auth0Credentials struct {
+	clientConfig Auth0ClientConfig
+	helper       ManagerHelper
+	httpClient   ManagerHTTPClient
+	jwtToken     JWTToken
+	mux          sync.Mutex
+}
+
+// NewAuth0Manager creates a new instance of the Auth0Manager
+func NewAuth0Manager(config Auth0ClientConfig) *Auth0Manager {
+
+	httpTransport := http.DefaultTransport.(*http.Transport).Clone()
+	httpTransport.MaxIdleConns = 5
+	httpTransport.IdleConnTimeout = 30
+
+	httpClient := &http.Client{
+		Timeout:   10 * time.Second,
+		Transport: httpTransport,
+	}
+
+	helper := JsonParser{}
+
+	credentials := &Auth0Credentials{
+		clientConfig: config,
+		httpClient:   httpClient,
+		helper:       helper,
+	}
+	return &Auth0Manager{
+		authIssuer:  config.AuthIssuer,
+		credentials: credentials,
+		httpClient:  httpClient,
+		helper:      helper,
+	}
+}
+
+// jwtStillValid returns true if the token still valid and have enough time to be used and get a response from Auth0
+func (c *Auth0Credentials) jwtStillValid() bool {
+	return !c.jwtToken.expiresInTime.IsZero() && time.Now().Add(5*time.Second).Before(c.jwtToken.expiresInTime)
+}
+
+// requestJWTToken performs request to get jwt token
+func (c *Auth0Credentials) requestJWTToken() (*http.Response, error) {
+	var res *http.Response
+	url := c.clientConfig.AuthIssuer + "/oauth/token"
+
+	p, err := c.helper.Marshal(c.clientConfig)
+	if err != nil {
+		return res, err
+	}
+	payload := strings.NewReader(string(p))
+
+	req, err := http.NewRequest("POST", url, payload)
+	if err != nil {
+		return res, err
+	}
+
+	req.Header.Add("content-type", "application/json")
+
+	res, err = c.httpClient.Do(req)
+	if err != nil {
+		return res, err
+	}
+
+	if res.StatusCode != 200 {
+		return res, fmt.Errorf("unable to get token, statusCode %d", res.StatusCode)
+	}
+	return res, nil
+}
+
+// parseRequestJWTResponse parses jwt raw response body and extracts token and expires in seconds
+func (c *Auth0Credentials) parseRequestJWTResponse(rawBody io.ReadCloser) (JWTToken, error) {
+	jwtToken := JWTToken{}
+	body, err := ioutil.ReadAll(rawBody)
+	if err != nil {
+		return jwtToken, err
+	}
+
+	err = c.helper.Unmarshal(body, &jwtToken)
+	if err != nil {
+		return jwtToken, err
+	}
+	if jwtToken.ExpiresIn == 0 && jwtToken.AccessToken == "" {
+		return jwtToken, fmt.Errorf("error while reading response body, expires_in: %d and access_token: %s", jwtToken.ExpiresIn, jwtToken.AccessToken)
+	}
+	data, err := jwt.DecodeSegment(strings.Split(jwtToken.AccessToken, ".")[1])
+	if err != nil {
+		return jwtToken, err
+	}
+	// Exp maps into exp from jwt token
+	var IssuedAt struct{ Exp int64 }
+	err = json.Unmarshal(data, &IssuedAt)
+	if err != nil {
+		return jwtToken, err
+	}
+	jwtToken.expiresInTime = time.Unix(IssuedAt.Exp, 0)
+
+	return jwtToken, nil
+}
+
+// Authenticate retrieves access token to use the Auth0 Management API
+func (c *Auth0Credentials) Authenticate() (JWTToken, error) {
+	c.mux.Lock()
+	defer c.mux.Unlock()
+
+	// If jwtToken has an expires time and we have enough time to do a request return immediately
+	if c.jwtStillValid() {
+		return c.jwtToken, nil
+	}
+
+	res, err := c.requestJWTToken()
+	if err != nil {
+		return c.jwtToken, err
+	}
+	defer func() {
+		err = res.Body.Close()
+		if err != nil {
+			log.Errorf("error while closing get jwt token response body: %v", err)
+		}
+	}()
+
+	jwtToken, err := c.parseRequestJWTResponse(res.Body)
+	if err != nil {
+		return c.jwtToken, err
+	}
+
+	c.jwtToken = jwtToken
+
+	return c.jwtToken, nil
+}
+
+// UpdateUserAppMetadata updates user app metadata based on userId and metadata map
+func (am *Auth0Manager) UpdateUserAppMetadata(userId string, appMetadata AppMetadata) error {
+
+	jwtToken, err := am.credentials.Authenticate()
+	if err != nil {
+		return err
+	}
+
+	url := am.authIssuer + "/api/v2/users/" + userId
+
+	data, err := am.helper.Marshal(appMetadata)
+	if err != nil {
+		return err
+	}
+
+	payloadString := fmt.Sprintf("{\"app_metadata\": %s}", string(data))
+
+	payload := strings.NewReader(payloadString)
+
+	req, err := http.NewRequest("PATCH", url, payload)
+	if err != nil {
+		return err
+	}
+	req.Header.Add("authorization", "Bearer "+jwtToken.AccessToken)
+	req.Header.Add("content-type", "application/json")
+
+	res, err := am.httpClient.Do(req)
+	if err != nil {
+		return err
+	}
+
+	defer func() {
+		err = res.Body.Close()
+		if err != nil {
+			log.Errorf("error while closing update user app metadata response body: %v", err)
+		}
+	}()
+
+	if res.StatusCode != 200 {
+		return fmt.Errorf("unable to update the appMetadata, statusCode %d", res.StatusCode)
+	}
+
+	return nil
+}

management/server/idp/auth0_test.go

@@ -0,0 +1,403 @@
+package idp
+
+import (
+	"encoding/json"
+	"fmt"
+	"github.com/golang-jwt/jwt"
+	"github.com/stretchr/testify/assert"
+	"io/ioutil"
+	"net/http"
+	"strings"
+	"testing"
+	"time"
+)
+
+type mockHTTPClient struct {
+	code    int
+	resBody string
+	reqBody string
+	err     error
+}
+
+func (c *mockHTTPClient) Do(req *http.Request) (*http.Response, error) {
+	body, err := ioutil.ReadAll(req.Body)
+	if err == nil {
+		c.reqBody = string(body)
+	}
+	return &http.Response{
+		StatusCode: c.code,
+		Body:       ioutil.NopCloser(strings.NewReader(c.resBody)),
+	}, c.err
+}
+
+type mockJsonParser struct {
+	jsonParser           JsonParser
+	marshalErrorString   string
+	unmarshalErrorString string
+}
+
+func (m *mockJsonParser) Marshal(v interface{}) ([]byte, error) {
+	if m.marshalErrorString != "" {
+		return nil, fmt.Errorf(m.marshalErrorString)
+	}
+	return m.jsonParser.Marshal(v)
+}
+
+func (m *mockJsonParser) Unmarshal(data []byte, v interface{}) error {
+	if m.unmarshalErrorString != "" {
+		return fmt.Errorf(m.unmarshalErrorString)
+	}
+	return m.jsonParser.Unmarshal(data, v)
+}
+
+type mockAuth0Credentials struct {
+	jwtToken JWTToken
+	err      error
+}
+
+func (mc *mockAuth0Credentials) Authenticate() (JWTToken, error) {
+	return mc.jwtToken, mc.err
+}
+
+func newTestJWT(t *testing.T, expInt int) string {
+	now := time.Now()
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
+		"iat": now.Unix(),
+		"exp": now.Add(time.Duration(expInt) * time.Second).Unix(),
+	})
+	var hmacSampleSecret []byte
+	tokenString, err := token.SignedString(hmacSampleSecret)
+	if err != nil {
+		t.Fatal(err)
+	}
+	return tokenString
+}
+
+func TestAuth0_RequestJWTToken(t *testing.T) {
+
+	type requestJWTTokenTest struct {
+		name                    string
+		inputCode               int
+		inputResBody            string
+		helper                  ManagerHelper
+		expectedFuncExitErrDiff error
+		expectedCode            int
+		expectedToken           string
+	}
+	exp := 5
+	token := newTestJWT(t, exp)
+
+	requestJWTTokenTesttCase1 := requestJWTTokenTest{
+		name:          "Get Good JWT Response",
+		inputCode:     200,
+		inputResBody:  fmt.Sprintf("{\"access_token\":\"%s\",\"scope\":\"read:users\",\"expires_in\":%d,\"token_type\":\"Bearer\"}", token, exp),
+		helper:        JsonParser{},
+		expectedCode:  200,
+		expectedToken: token,
+	}
+	requestJWTTokenTestCase2 := requestJWTTokenTest{
+		name:                    "Request Bad Status Code",
+		inputCode:               400,
+		inputResBody:            "{}",
+		helper:                  JsonParser{},
+		expectedFuncExitErrDiff: fmt.Errorf("unable to get token, statusCode 400"),
+		expectedCode:            200,
+		expectedToken:           "",
+	}
+
+	for _, testCase := range []requestJWTTokenTest{requestJWTTokenTesttCase1, requestJWTTokenTestCase2} {
+		t.Run(testCase.name, func(t *testing.T) {
+
+			jwtReqClient := mockHTTPClient{
+				resBody: testCase.inputResBody,
+				code:    testCase.inputCode,
+			}
+			config := Auth0ClientConfig{}
+
+			creds := Auth0Credentials{
+				clientConfig: config,
+				httpClient:   &jwtReqClient,
+				helper:       testCase.helper,
+			}
+
+			res, err := creds.requestJWTToken()
+			if err != nil {
+				if testCase.expectedFuncExitErrDiff != nil {
+					assert.EqualError(t, err, testCase.expectedFuncExitErrDiff.Error(), "errors should be the same")
+				} else {
+					t.Fatal(err)
+				}
+			}
+			body, err := ioutil.ReadAll(res.Body)
+			assert.NoError(t, err, "unable to read the response body")
+
+			jwtToken := JWTToken{}
+			err = json.Unmarshal(body, &jwtToken)
+			assert.NoError(t, err, "unable to parse the json input")
+
+			assert.Equalf(t, testCase.expectedToken, jwtToken.AccessToken, "two tokens should be the same")
+		})
+	}
+}
+
+func TestAuth0_ParseRequestJWTResponse(t *testing.T) {
+	type parseRequestJWTResponseTest struct {
+		name                 string
+		inputResBody         string
+		helper               ManagerHelper
+		expectedToken        string
+		expectedExpiresIn    int
+		assertErrFunc        func(t assert.TestingT, err error, msgAndArgs ...interface{}) bool
+		assertErrFuncMessage string
+	}
+
+	exp := 100
+	token := newTestJWT(t, exp)
+
+	parseRequestJWTResponseTestCase1 := parseRequestJWTResponseTest{
+		name:                 "Parse Good JWT Body",
+		inputResBody:         fmt.Sprintf("{\"access_token\":\"%s\",\"scope\":\"read:users\",\"expires_in\":%d,\"token_type\":\"Bearer\"}", token, exp),
+		helper:               JsonParser{},
+		expectedToken:        token,
+		expectedExpiresIn:    exp,
+		assertErrFunc:        assert.NoError,
+		assertErrFuncMessage: "no error was expected",
+	}
+	parseRequestJWTResponseTestCase2 := parseRequestJWTResponseTest{
+		name:                 "Parse Bad json JWT Body",
+		inputResBody:         "",
+		helper:               JsonParser{},
+		expectedToken:        "",
+		expectedExpiresIn:    0,
+		assertErrFunc:        assert.Error,
+		assertErrFuncMessage: "json error was expected",
+	}
+
+	for _, testCase := range []parseRequestJWTResponseTest{parseRequestJWTResponseTestCase1, parseRequestJWTResponseTestCase2} {
+		t.Run(testCase.name, func(t *testing.T) {
+
+			rawBody := ioutil.NopCloser(strings.NewReader(testCase.inputResBody))
+
+			config := Auth0ClientConfig{}
+
+			creds := Auth0Credentials{
+				clientConfig: config,
+				helper:       testCase.helper,
+			}
+
+			jwtToken, err := creds.parseRequestJWTResponse(rawBody)
+			testCase.assertErrFunc(t, err, testCase.assertErrFuncMessage)
+
+			assert.Equalf(t, testCase.expectedToken, jwtToken.AccessToken, "two tokens should be the same")
+			assert.Equalf(t, testCase.expectedExpiresIn, jwtToken.ExpiresIn, "the two expire times should be the same")
+		})
+	}
+}
+
+func TestAuth0_JwtStillValid(t *testing.T) {
+
+	type jwtStillValidTest struct {
+		name           string
+		inputTime      time.Time
+		expectedResult bool
+		message        string
+	}
+	jwtStillValidTestCase1 := jwtStillValidTest{
+		name:           "JWT still valid",
+		inputTime:      time.Now().Add(10 * time.Second),
+		expectedResult: true,
+		message:        "should be true",
+	}
+	jwtStillValidTestCase2 := jwtStillValidTest{
+		name:           "JWT is invalid",
+		inputTime:      time.Now(),
+		expectedResult: false,
+		message:        "should be false",
+	}
+
+	for _, testCase := range []jwtStillValidTest{jwtStillValidTestCase1, jwtStillValidTestCase2} {
+		t.Run(testCase.name, func(t *testing.T) {
+
+			config := Auth0ClientConfig{}
+
+			creds := Auth0Credentials{
+				clientConfig: config,
+			}
+			creds.jwtToken.expiresInTime = testCase.inputTime
+
+			assert.Equalf(t, testCase.expectedResult, creds.jwtStillValid(), testCase.message)
+		})
+	}
+}
+
+func TestAuth0_Authenticate(t *testing.T) {
+	type authenticateTest struct {
+		name                    string
+		inputCode               int
+		inputResBody            string
+		inputExpireToken        time.Time
+		helper                  ManagerHelper
+		expectedFuncExitErrDiff error
+		expectedCode            int
+		expectedToken           string
+	}
+	exp := 5
+	token := newTestJWT(t, exp)
+
+	authenticateTestCase1 := authenticateTest{
+		name:             "Get Cached token",
+		inputExpireToken: time.Now().Add(30 * time.Second),
+		helper:           JsonParser{},
+		//expectedFuncExitErrDiff: fmt.Errorf("unable to get token, statusCode 400"),
+		expectedCode:  200,
+		expectedToken: "",
+	}
+
+	authenticateTestCase2 := authenticateTest{
+		name:          "Get Good JWT Response",
+		inputCode:     200,
+		inputResBody:  fmt.Sprintf("{\"access_token\":\"%s\",\"scope\":\"read:users\",\"expires_in\":%d,\"token_type\":\"Bearer\"}", token, exp),
+		helper:        JsonParser{},
+		expectedCode:  200,
+		expectedToken: token,
+	}
+	authenticateTestCase3 := authenticateTest{
+		name:                    "Get Bad Status Code",
+		inputCode:               400,
+		inputResBody:            "{}",
+		helper:                  JsonParser{},
+		expectedFuncExitErrDiff: fmt.Errorf("unable to get token, statusCode 400"),
+		expectedCode:            200,
+		expectedToken:           "",
+	}
+
+	for _, testCase := range []authenticateTest{authenticateTestCase1, authenticateTestCase2, authenticateTestCase3} {
+		t.Run(testCase.name, func(t *testing.T) {
+
+			jwtReqClient := mockHTTPClient{
+				resBody: testCase.inputResBody,
+				code:    testCase.inputCode,
+			}
+			config := Auth0ClientConfig{}
+
+			creds := Auth0Credentials{
+				clientConfig: config,
+				httpClient:   &jwtReqClient,
+				helper:       testCase.helper,
+			}
+
+			creds.jwtToken.expiresInTime = testCase.inputExpireToken
+
+			_, err := creds.Authenticate()
+			if err != nil {
+				if testCase.expectedFuncExitErrDiff != nil {
+					assert.EqualError(t, err, testCase.expectedFuncExitErrDiff.Error(), "errors should be the same")
+				} else {
+					t.Fatal(err)
+				}
+			}
+
+			assert.Equalf(t, testCase.expectedToken, creds.jwtToken.AccessToken, "two tokens should be the same")
+		})
+	}
+}
+
+func TestAuth0_UpdateUserAppMetadata(t *testing.T) {
+
+	type updateUserAppMetadataTest struct {
+		name                 string
+		inputReqBody         string
+		expectedReqBody      string
+		appMetadata          AppMetadata
+		statusCode           int
+		helper               ManagerHelper
+		managerCreds         ManagerCredentials
+		assertErrFunc        func(t assert.TestingT, err error, msgAndArgs ...interface{}) bool
+		assertErrFuncMessage string
+	}
+
+	exp := 15
+	token := newTestJWT(t, exp)
+	appMetadata := AppMetadata{WTAccountId: "ok"}
+
+	updateUserAppMetadataTestCase1 := updateUserAppMetadataTest{
+		name:            "Bad Authentication",
+		inputReqBody:    fmt.Sprintf("{\"access_token\":\"%s\",\"scope\":\"read:users\",\"expires_in\":%d,\"token_type\":\"Bearer\"}", token, exp),
+		expectedReqBody: "",
+		appMetadata:     appMetadata,
+		statusCode:      400,
+		helper:          JsonParser{},
+		managerCreds: &mockAuth0Credentials{
+			jwtToken: JWTToken{},
+			err:      fmt.Errorf("error"),
+		},
+		assertErrFunc:        assert.Error,
+		assertErrFuncMessage: "should return error",
+	}
+
+	updateUserAppMetadataTestCase2 := updateUserAppMetadataTest{
+		name:            "Bad Status Code",
+		inputReqBody:    fmt.Sprintf("{\"access_token\":\"%s\",\"scope\":\"read:users\",\"expires_in\":%d,\"token_type\":\"Bearer\"}", token, exp),
+		expectedReqBody: fmt.Sprintf("{\"app_metadata\": {\"wt_account_id\":\"%s\"}}", appMetadata.WTAccountId),
+		appMetadata:     appMetadata,
+		statusCode:      400,
+		helper:          JsonParser{},
+		managerCreds: &mockAuth0Credentials{
+			jwtToken: JWTToken{},
+		},
+		assertErrFunc:        assert.Error,
+		assertErrFuncMessage: "should return error",
+	}
+
+	updateUserAppMetadataTestCase3 := updateUserAppMetadataTest{
+		name:                 "Bad Response Parsing",
+		inputReqBody:         fmt.Sprintf("{\"access_token\":\"%s\",\"scope\":\"read:users\",\"expires_in\":%d,\"token_type\":\"Bearer\"}", token, exp),
+		statusCode:           400,
+		helper:               &mockJsonParser{marshalErrorString: "error"},
+		assertErrFunc:        assert.Error,
+		assertErrFuncMessage: "should return error",
+	}
+
+	updateUserAppMetadataTestCase4 := updateUserAppMetadataTest{
+		name:                 "Good request",
+		inputReqBody:         fmt.Sprintf("{\"access_token\":\"%s\",\"scope\":\"read:users\",\"expires_in\":%d,\"token_type\":\"Bearer\"}", token, exp),
+		expectedReqBody:      fmt.Sprintf("{\"app_metadata\": {\"wt_account_id\":\"%s\"}}", appMetadata.WTAccountId),
+		appMetadata:          appMetadata,
+		statusCode:           200,
+		helper:               JsonParser{},
+		assertErrFunc:        assert.NoError,
+		assertErrFuncMessage: "shouldn't return error",
+	}
+
+	for _, testCase := range []updateUserAppMetadataTest{updateUserAppMetadataTestCase1, updateUserAppMetadataTestCase2, updateUserAppMetadataTestCase3, updateUserAppMetadataTestCase4} {
+		t.Run(testCase.name, func(t *testing.T) {
+			jwtReqClient := mockHTTPClient{
+				resBody: testCase.inputReqBody,
+				code:    testCase.statusCode,
+			}
+			config := Auth0ClientConfig{}
+
+			var creds ManagerCredentials
+			if testCase.managerCreds != nil {
+				creds = testCase.managerCreds
+			} else {
+				creds = &Auth0Credentials{
+					clientConfig: config,
+					httpClient:   &jwtReqClient,
+					helper:       testCase.helper,
+				}
+			}
+
+			manager := Auth0Manager{
+				httpClient:  &jwtReqClient,
+				credentials: creds,
+				helper:      testCase.helper,
+			}
+
+			err := manager.UpdateUserAppMetadata("1", testCase.appMetadata)
+			testCase.assertErrFunc(t, err, testCase.assertErrFuncMessage)
+
+			assert.Equal(t, testCase.expectedReqBody, jwtReqClient.reqBody, "request body should match")
+		})
+	}
+}

management/server/idp/idp.go

@@ -0,0 +1,63 @@
+package idp
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+)
+
+// Manager idp manager interface
+type Manager interface {
+	UpdateUserAppMetadata(userId string, appMetadata AppMetadata) error
+}
+
+// Config an idp configuration struct to be loaded from management server's config file
+type Config struct {
+	ManagerType            string
+	Auth0ClientCredentials Auth0ClientConfig
+}
+
+// ManagerCredentials interface that authenticates using the credential of each type of idp
+type ManagerCredentials interface {
+	Authenticate() (JWTToken, error)
+}
+
+// ManagerHTTPClient http client interface for API calls
+type ManagerHTTPClient interface {
+	Do(req *http.Request) (*http.Response, error)
+}
+
+// ManagerHelper helper
+type ManagerHelper interface {
+	Marshal(v interface{}) ([]byte, error)
+	Unmarshal(data []byte, v interface{}) error
+}
+
+// AppMetadata user app metadata to associate with a profile
+type AppMetadata struct {
+	// Wiretrustee account id to update in the IDP
+	// maps to wt_account_id when json.marshal
+	WTAccountId string `json:"wt_account_id"`
+}
+
+// JWTToken a JWT object that holds information of a token
+type JWTToken struct {
+	AccessToken   string `json:"access_token"`
+	ExpiresIn     int    `json:"expires_in"`
+	expiresInTime time.Time
+	Scope         string `json:"scope"`
+	TokenType     string `json:"token_type"`
+}
+
+// NewManager returns a new idp manager based on the configuration that it receives
+func NewManager(config Config) (Manager, error) {
+	switch strings.ToLower(config.ManagerType) {
+	case "none", "":
+		return nil, nil
+	case "auth0":
+		return NewAuth0Manager(config.Auth0ClientCredentials), nil
+	default:
+		return nil, fmt.Errorf("invalid manager type: %s", config.ManagerType)
+	}
+}

management/server/idp/util.go

@@ -0,0 +1,13 @@
+package idp
+
+import "encoding/json"
+
+type JsonParser struct{}
+
+func (JsonParser) Marshal(v interface{}) ([]byte, error) {
+	return json.Marshal(v)
+}
+
+func (JsonParser) Unmarshal(data []byte, v interface{}) error {
+	return json.Unmarshal(data, v)
+}

management/server/management_proto_test.go

@@ -0,0 +1,348 @@
+package server
+
+import (
+	"context"
+	"fmt"
+	log "github.com/sirupsen/logrus"
+	"github.com/wiretrustee/wiretrustee/encryption"
+	mgmtProto "github.com/wiretrustee/wiretrustee/management/proto"
+	"github.com/wiretrustee/wiretrustee/util"
+	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+	"google.golang.org/grpc/keepalive"
+	"net"
+	"os"
+	"path/filepath"
+	"runtime"
+	"testing"
+	"time"
+)
+
+var (
+	kaep = keepalive.EnforcementPolicy{
+		MinTime:             15 * time.Second,
+		PermitWithoutStream: true,
+	}
+
+	kasp = keepalive.ServerParameters{
+		MaxConnectionIdle:     15 * time.Second,
+		MaxConnectionAgeGrace: 5 * time.Second,
+		Time:                  5 * time.Second,
+		Timeout:               2 * time.Second,
+	}
+)
+
+const (
+	TestValidSetupKey = "A2C8E62B-38F5-4553-B31E-DD66C696CEBB"
+)
+
+// registerPeers registers peersNum peers on the management service and returns their Wireguard keys
+func registerPeers(peersNum int, client mgmtProto.ManagementServiceClient) ([]*wgtypes.Key, error) {
+
+	var peers = []*wgtypes.Key{}
+	for i := 0; i < peersNum; i++ {
+		key, err := wgtypes.GeneratePrivateKey()
+		if err != nil {
+			return nil, err
+		}
+
+		_, err = loginPeerWithValidSetupKey(key, client)
+		if err != nil {
+			return nil, err
+		}
+
+		peers = append(peers, &key)
+	}
+
+	return peers, nil
+}
+
+// getServerKey gets Management Service Wireguard public key
+func getServerKey(client mgmtProto.ManagementServiceClient) (*wgtypes.Key, error) {
+
+	keyResp, err := client.GetServerKey(context.TODO(), &mgmtProto.Empty{})
+	if err != nil {
+		return nil, err
+	}
+
+	serverKey, err := wgtypes.ParseKey(keyResp.Key)
+	if err != nil {
+		return nil, err
+	}
+
+	return &serverKey, nil
+}
+
+func Test_SyncProtocol(t *testing.T) {
+
+	dir := t.TempDir()
+	err := util.CopyFileContents("testdata/store.json", filepath.Join(dir, "store.json"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		os.Remove(filepath.Join(dir, "store.json")) //nolint
+	}()
+	mport := 33091
+	mgmtServer, err := startManagement(mport, &Config{
+		Stuns: []*Host{{
+			Proto: "udp",
+			URI:   "stun:stun.wiretrustee.com:3468",
+		}},
+		TURNConfig: &TURNConfig{
+			TimeBasedCredentials: false,
+			CredentialsTTL:       util.Duration{},
+			Secret:               "whatever",
+			Turns: []*Host{{
+				Proto: "udp",
+				URI:   "turn:stun.wiretrustee.com:3468",
+			}},
+		},
+		Signal: &Host{
+			Proto: "http",
+			URI:   "signal.wiretrustee.com:10000",
+		},
+		Datadir:    dir,
+		HttpConfig: nil,
+	})
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+	defer mgmtServer.GracefulStop()
+
+	client, clientConn, err := createRawClient(fmt.Sprintf("localhost:%d", mport))
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	defer clientConn.Close()
+
+	peers, err := registerPeers(2, client)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	serverKey, err := getServerKey(client)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	// take the first registered peer as a base for the test
+	key := *peers[0]
+
+	message, err := encryption.EncryptMessage(*serverKey, key, &mgmtProto.SyncRequest{})
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	sync, err := client.Sync(context.TODO(), &mgmtProto.EncryptedMessage{
+		WgPubKey: key.PublicKey().String(),
+		Body:     message,
+	})
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	resp := &mgmtProto.EncryptedMessage{}
+	err = sync.RecvMsg(resp)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	syncResp := &mgmtProto.SyncResponse{}
+	err = encryption.DecryptMessage(*serverKey, key, resp.Body, syncResp)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	wiretrusteeConfig := syncResp.GetWiretrusteeConfig()
+	if wiretrusteeConfig == nil {
+		t.Fatal("expecting SyncResponse to have non-nil WiretrusteeConfig")
+	}
+
+	if wiretrusteeConfig.GetSignal() == nil {
+		t.Fatal("expecting SyncResponse to have WiretrusteeConfig with non-nil Signal config")
+	}
+
+	expectedSignalConfig := &mgmtProto.HostConfig{
+		Uri:      "signal.wiretrustee.com:10000",
+		Protocol: mgmtProto.HostConfig_HTTP,
+	}
+
+	if wiretrusteeConfig.GetSignal().GetUri() != expectedSignalConfig.GetUri() {
+		t.Fatalf("expecting SyncResponse to have WiretrusteeConfig with expected Signal URI: %v, actual: %v",
+			expectedSignalConfig.GetUri(),
+			wiretrusteeConfig.GetSignal().GetUri())
+	}
+
+	if wiretrusteeConfig.GetSignal().GetProtocol() != expectedSignalConfig.GetProtocol() {
+		t.Fatalf("expecting SyncResponse to have WiretrusteeConfig with expected Signal Protocol: %v, actual: %v",
+			expectedSignalConfig.GetProtocol().String(),
+			wiretrusteeConfig.GetSignal().GetProtocol())
+	}
+
+	expectedStunsConfig := &mgmtProto.HostConfig{
+		Uri:      "stun:stun.wiretrustee.com:3468",
+		Protocol: mgmtProto.HostConfig_UDP,
+	}
+
+	if wiretrusteeConfig.GetStuns()[0].GetUri() != expectedStunsConfig.GetUri() {
+		t.Fatalf("expecting SyncResponse to have WiretrusteeConfig with expected STUN URI: %v, actual: %v",
+			expectedStunsConfig.GetUri(),
+			wiretrusteeConfig.GetStuns()[0].GetUri())
+	}
+
+	if wiretrusteeConfig.GetStuns()[0].GetProtocol() != expectedStunsConfig.GetProtocol() {
+		t.Fatalf("expecting SyncResponse to have WiretrusteeConfig with expected STUN Protocol: %v, actual: %v",
+			expectedStunsConfig.GetProtocol(),
+			wiretrusteeConfig.GetStuns()[0].GetProtocol())
+	}
+
+	expectedTRUNHost := &mgmtProto.HostConfig{
+		Uri:      "turn:stun.wiretrustee.com:3468",
+		Protocol: mgmtProto.HostConfig_UDP,
+	}
+
+	if wiretrusteeConfig.GetTurns()[0].GetHostConfig().GetUri() != expectedTRUNHost.GetUri() {
+		t.Fatalf("expecting SyncResponse to have WiretrusteeConfig with expected TURN URI: %v, actual: %v",
+			expectedTRUNHost.GetUri(),
+			wiretrusteeConfig.GetTurns()[0].GetHostConfig().GetUri())
+	}
+
+	if wiretrusteeConfig.GetTurns()[0].GetHostConfig().GetProtocol() != expectedTRUNHost.GetProtocol() {
+		t.Fatalf("expecting SyncResponse to have WiretrusteeConfig with expected TURN Protocol: %v, actual: %v",
+			expectedTRUNHost.GetProtocol().String(),
+			wiretrusteeConfig.GetTurns()[0].GetHostConfig().GetProtocol())
+	}
+
+	// ensure backward compatibility
+
+	if syncResp.GetRemotePeers() == nil {
+		t.Fatal("expecting SyncResponse to have non-nil RemotePeers for backward compatibility")
+	}
+
+	if syncResp.GetPeerConfig() == nil {
+		t.Fatal("expecting SyncResponse to have non-nil PeerConfig for backward compatibility")
+	}
+
+	// new field - NetworkMap
+	networkMap := syncResp.GetNetworkMap()
+	if networkMap == nil {
+		t.Fatal("expecting SyncResponse to have non-nil NetworkMap")
+	}
+
+	if len(networkMap.GetRemotePeers()) != 1 {
+		t.Fatal("expecting SyncResponse to have NetworkMap with 1 remote peer")
+	}
+
+	if networkMap.GetPeerConfig() == nil {
+		t.Fatal("expecting SyncResponse to have NetworkMap with a non-nil PeerConfig")
+	}
+
+	if networkMap.GetPeerConfig().GetAddress() != "100.64.0.1/24" {
+		t.Fatal("expecting SyncResponse to have NetworkMap with a PeerConfig having valid Address")
+	}
+
+	if networkMap.GetSerial() <= 0 {
+		t.Fatalf("expecting SyncResponse to have NetworkMap with a positive Network Serial, actual %d", networkMap.GetSerial())
+	}
+}
+
+func loginPeerWithValidSetupKey(key wgtypes.Key, client mgmtProto.ManagementServiceClient) (*mgmtProto.LoginResponse, error) {
+
+	serverKey, err := getServerKey(client)
+	if err != nil {
+		return nil, err
+	}
+
+	meta := &mgmtProto.PeerSystemMeta{
+		Hostname:           key.PublicKey().String(),
+		GoOS:               runtime.GOOS,
+		OS:                 runtime.GOOS,
+		Core:               "core",
+		Platform:           "platform",
+		Kernel:             "kernel",
+		WiretrusteeVersion: "",
+	}
+	message, err := encryption.EncryptMessage(*serverKey, key, &mgmtProto.LoginRequest{SetupKey: TestValidSetupKey, Meta: meta})
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := client.Login(context.TODO(), &mgmtProto.EncryptedMessage{
+		WgPubKey: key.PublicKey().String(),
+		Body:     message,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	loginResp := &mgmtProto.LoginResponse{}
+	err = encryption.DecryptMessage(*serverKey, key, resp.Body, loginResp)
+	if err != nil {
+		return nil, err
+	}
+
+	return loginResp, nil
+
+}
+
+func startManagement(port int, config *Config) (*grpc.Server, error) {
+
+	lis, err := net.Listen("tcp", fmt.Sprintf("localhost:%d", port))
+	if err != nil {
+		return nil, err
+	}
+	s := grpc.NewServer(grpc.KeepaliveEnforcementPolicy(kaep), grpc.KeepaliveParams(kasp))
+	store, err := NewStore(config.Datadir)
+	if err != nil {
+		return nil, err
+	}
+	peersUpdateManager := NewPeersUpdateManager()
+	accountManager := NewManager(store, peersUpdateManager, nil)
+	turnManager := NewTimeBasedAuthSecretsManager(peersUpdateManager, config.TURNConfig)
+	mgmtServer, err := NewServer(config, accountManager, peersUpdateManager, turnManager)
+	if err != nil {
+		return nil, err
+	}
+	mgmtProto.RegisterManagementServiceServer(s, mgmtServer)
+	go func() {
+		if err = s.Serve(lis); err != nil {
+			log.Fatalf("failed to serve: %v", err)
+		}
+	}()
+
+	return s, nil
+}
+
+func createRawClient(addr string) (mgmtProto.ManagementServiceClient, *grpc.ClientConn, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	conn, err := grpc.DialContext(ctx, addr,
+		grpc.WithTransportCredentials(insecure.NewCredentials()),
+		grpc.WithBlock(),
+		grpc.WithKeepaliveParams(keepalive.ClientParameters{
+			Time:    10 * time.Second,
+			Timeout: 2 * time.Second,
+		}))
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return mgmtProto.NewManagementServiceClient(conn), conn, nil
+}

management/server/management_server_mock.go

@@ -0,0 +1,46 @@
+package server
+
+import (
+	"context"
+
+	"github.com/wiretrustee/wiretrustee/management/proto"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+type ManagementServiceServerMock struct {
+	proto.UnimplementedManagementServiceServer
+
+	LoginFunc        func(context.Context, *proto.EncryptedMessage) (*proto.EncryptedMessage, error)
+	SyncFunc         func(*proto.EncryptedMessage, proto.ManagementService_SyncServer)
+	GetServerKeyFunc func(context.Context, *proto.Empty) (*proto.ServerKeyResponse, error)
+	IsHealthyFunc    func(context.Context, *proto.Empty) (*proto.Empty, error)
+}
+
+func (m ManagementServiceServerMock) Login(ctx context.Context, req *proto.EncryptedMessage) (*proto.EncryptedMessage, error) {
+	if m.LoginFunc != nil {
+		return m.LoginFunc(ctx, req)
+	}
+	return nil, status.Errorf(codes.Unimplemented, "method Login not implemented")
+}
+
+func (m ManagementServiceServerMock) Sync(msg *proto.EncryptedMessage, sync proto.ManagementService_SyncServer) error {
+	if m.SyncFunc != nil {
+		return m.Sync(msg, sync)
+	}
+	return status.Errorf(codes.Unimplemented, "method Sync not implemented")
+}
+
+func (m ManagementServiceServerMock) GetServerKey(ctx context.Context, empty *proto.Empty) (*proto.ServerKeyResponse, error) {
+	if m.GetServerKeyFunc != nil {
+		return m.GetServerKeyFunc(ctx, empty)
+	}
+	return nil, status.Errorf(codes.Unimplemented, "method GetServerKey not implemented")
+}
+
+func (m ManagementServiceServerMock) IsHealthy(ctx context.Context, empty *proto.Empty) (*proto.Empty, error) {
+	if m.IsHealthyFunc != nil {
+		return m.IsHealthyFunc(ctx, empty)
+	}
+	return nil, status.Errorf(codes.Unimplemented, "method IsHealthy not implemented")
+}

management/server/management_test.go

@@ -496,7 +496,7 @@ func startServer(config *server.Config) (*grpc.Server, net.Listener) {
 		log.Fatalf("failed creating a store: %s: %v", config.Datadir, err)
 	}
 	peersUpdateManager := server.NewPeersUpdateManager()
-	accountManager := server.NewManager(store, peersUpdateManager)
+	accountManager := server.NewManager(store, peersUpdateManager, nil)
 	turnManager := server.NewTimeBasedAuthSecretsManager(peersUpdateManager, config.TURNConfig)
 	mgmtServer, err := server.NewServer(config, accountManager, peersUpdateManager, turnManager)
 	Expect(err).NotTo(HaveOccurred())

management/server/network.go

@@ -3,7 +3,9 @@ package server
 import (
 	"encoding/binary"
 	"fmt"
+	"github.com/rs/xid"
 	"net"
+	"sync"
 )
 
 var (
@@ -11,17 +13,51 @@ var (
 	upperIPv6 = []byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
 )
 
+type NetworkMap struct {
+	Peers   []*Peer
+	Network *Network
+}
+
 type Network struct {
 	Id  string
 	Net net.IPNet
 	Dns string
+	// serial is an ID that increments by 1 when any change to the network happened (e.g. new peer has been added).
+	// Used to synchronize state to the client apps.
+	serial uint64
+
+	mu sync.Mutex `json:"-"`
+}
+
+// NewNetwork creates a new Network initializing it with a serial=0
+func NewNetwork() *Network {
+	return &Network{
+		Id:     xid.New().String(),
+		Net:    net.IPNet{IP: net.ParseIP("100.64.0.0"), Mask: net.IPMask{255, 192, 0, 0}},
+		Dns:    "",
+		serial: 0}
+}
+
+// IncSerial increments serial by 1 reflecting that the network state has been changed
+func (n *Network) IncSerial() {
+	n.mu.Lock()
+	defer n.mu.Unlock()
+	n.serial = n.serial + 1
+}
+
+// Serial returns the Network.serial of the network (latest state id)
+func (n *Network) Serial() uint64 {
+	n.mu.Lock()
+	defer n.mu.Unlock()
+	return n.serial
 }
 
 func (n *Network) Copy() *Network {
 	return &Network{
-		Id:  n.Id,
+		Id:     n.Id,
-		Net: n.Net,
+		Net:    n.Net,
-		Dns: n.Dns,
+		Dns:    n.Dns,
+		serial: n.serial,
 	}
 }
 

management/server/peer.go

@@ -118,16 +118,34 @@ func (am *AccountManager) DeletePeer(accountId string, peerKey string) (*Peer, e
 	am.mux.Lock()
 	defer am.mux.Unlock()
 
+	account, err := am.Store.GetAccount(accountId)
+	if err != nil {
+		return nil, status.Errorf(codes.NotFound, "account not found")
+	}
+
 	peer, err := am.Store.DeletePeer(accountId, peerKey)
 	if err != nil {
 		return nil, err
 	}
 
+	account.Network.IncSerial()
+	err = am.Store.SaveAccount(account)
+	if err != nil {
+		return nil, err
+	}
+
 	err = am.peersUpdateManager.SendUpdate(peerKey,
 		&UpdateMessage{
 			Update: &proto.SyncResponse{
+				// fill those field for backward compatibility
 				RemotePeers:        []*proto.RemotePeerConfig{},
 				RemotePeersIsEmpty: true,
+				// new field
+				NetworkMap: &proto.NetworkMap{
+					Serial:             account.Network.Serial(),
+					RemotePeers:        []*proto.RemotePeerConfig{},
+					RemotePeersIsEmpty: true,
+				},
 			}})
 	if err != nil {
 		return nil, err
@@ -150,8 +168,15 @@ func (am *AccountManager) DeletePeer(accountId string, peerKey string) (*Peer, e
 		err = am.peersUpdateManager.SendUpdate(p.Key,
 			&UpdateMessage{
 				Update: &proto.SyncResponse{
+					// fill those field for backward compatibility
 					RemotePeers:        update,
 					RemotePeersIsEmpty: len(update) == 0,
+					// new field
+					NetworkMap: &proto.NetworkMap{
+						Serial:             account.Network.Serial(),
+						RemotePeers:        update,
+						RemotePeersIsEmpty: len(update) == 0,
+					},
 				}})
 		if err != nil {
 			return nil, err
@@ -181,9 +206,8 @@ func (am *AccountManager) GetPeerByIP(accountId string, peerIP string) (*Peer, e
 	return nil, status.Errorf(codes.NotFound, "peer with IP %s not found", peerIP)
 }
 
-// GetPeersForAPeer returns a list of peers available for a given peer (key)
+// GetNetworkMap returns Network map for a given peer (omits original peer from the Peers result)
-// Effectively all the peers of the original peer's account except for the peer itself
+func (am *AccountManager) GetNetworkMap(peerKey string) (*NetworkMap, error) {
-func (am *AccountManager) GetPeersForAPeer(peerKey string) ([]*Peer, error) {
 	am.mux.Lock()
 	defer am.mux.Unlock()
 
@@ -194,12 +218,16 @@ func (am *AccountManager) GetPeersForAPeer(peerKey string) ([]*Peer, error) {
 
 	var res []*Peer
 	for _, peer := range account.Peers {
+		// exclude original peer
 		if peer.Key != peerKey {
-			res = append(res, peer)
+			res = append(res, peer.Copy())
 		}
 	}
 
-	return res, nil
+	return &NetworkMap{
+		Peers:   res,
+		Network: account.Network.Copy(),
+	}, err
 }
 
 // AddPeer adds a new peer to the Store.
@@ -207,7 +235,7 @@ func (am *AccountManager) GetPeersForAPeer(peerKey string) ([]*Peer, error) {
 // will be returned, meaning the key is invalid
 // Each new Peer will be assigned a new next net.IP from the Account.Network and Account.Network.LastIP will be updated (IP's are not reused).
 // The peer property is just a placeholder for the Peer properties to pass further
-func (am *AccountManager) AddPeer(setupKey string, peer Peer) (*Peer, error) {
+func (am *AccountManager) AddPeer(setupKey string, peer *Peer) (*Peer, error) {
 	am.mux.Lock()
 	defer am.mux.Unlock()
 
@@ -255,6 +283,8 @@ func (am *AccountManager) AddPeer(setupKey string, peer Peer) (*Peer, error) {
 
 	account.Peers[newPeer.Key] = newPeer
 	account.SetupKeys[sk.Key] = sk.IncrementUsage()
+	account.Network.IncSerial()
+
 	err = am.Store.SaveAccount(account)
 	if err != nil {
 		return nil, status.Errorf(codes.Internal, "failed adding peer")

management/server/peer_test.go

@@ -0,0 +1,76 @@
+package server
+
+import (
+	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
+	"testing"
+)
+
+func TestAccountManager_GetNetworkMap(t *testing.T) {
+	manager, err := createManager(t)
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	expectedId := "test_account"
+	userId := "account_creator"
+	account, err := manager.AddAccount(expectedId, userId, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	var setupKey *SetupKey
+	for _, key := range account.SetupKeys {
+		if key.Type == SetupKeyReusable {
+			setupKey = key
+		}
+	}
+
+	peerKey1, err := wgtypes.GeneratePrivateKey()
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	_, err = manager.AddPeer(setupKey.Key, &Peer{
+		Key:  peerKey1.PublicKey().String(),
+		Meta: PeerSystemMeta{},
+		Name: "test-peer-2",
+	})
+
+	if err != nil {
+		t.Errorf("expecting peer to be added, got failure %v", err)
+		return
+	}
+
+	peerKey2, err := wgtypes.GeneratePrivateKey()
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+	_, err = manager.AddPeer(setupKey.Key, &Peer{
+		Key:  peerKey2.PublicKey().String(),
+		Meta: PeerSystemMeta{},
+		Name: "test-peer-2",
+	})
+
+	if err != nil {
+		t.Errorf("expecting peer to be added, got failure %v", err)
+		return
+	}
+
+	networkMap, err := manager.GetNetworkMap(peerKey1.PublicKey().String())
+	if err != nil {
+		t.Fatal(err)
+		return
+	}
+
+	if len(networkMap.Peers) != 1 {
+		t.Errorf("expecting Account NetworkMap to have 1 peers, got %v", len(networkMap.Peers))
+	}
+
+	if networkMap.Peers[0].Key != peerKey2.PublicKey().String() {
+		t.Errorf("expecting Account NetworkMap to have peer with a key %s, got %s", peerKey2.PublicKey().String(), networkMap.Peers[0].Key)
+	}
+
+}

management/server/testdata/management.json

@@ -33,5 +33,15 @@
         "AuthIssuer": "<PASTE YOUR AUTH0 ISSUER HERE>,",
         "AuthAudience": "<PASTE YOUR AUTH0 AUDIENCE HERE>",
         "AuthKeysLocation": "<PASTE YOUR AUTH0 PUBLIC JWT KEYS LOCATION HERE>"
+    },
+    "IdpManagerConfig": {
+        "Manager": "<none|auth0>",
+        "Auth0ClientCredentials": {
+            "Audience": "<PASTE YOUR AUTH0 AUDIENCE HERE>",
+            "AuthIssuer": "<PASTE YOUR AUTH0 Auth Issuer HERE>",
+            "ClientId": "<PASTE YOUR AUTH0 Application Client ID HERE>",
+            "ClientSecret": "<PASTE YOUR AUTH0 Application Client Secret HERE>",
+            "GrantType": "client_credentials"
+        }
     }
 }

management/server/user.go

@@ -40,14 +40,14 @@ func NewAdminUser(id string) *User {
 }
 
 // GetOrCreateAccountByUser returns an existing account for a given user id or creates a new one if doesn't exist
-func (am *AccountManager) GetOrCreateAccountByUser(userId string) (*Account, error) {
+func (am *AccountManager) GetOrCreateAccountByUser(userId, domain string) (*Account, error) {
 	am.mux.Lock()
 	defer am.mux.Unlock()
 
 	account, err := am.Store.GetUserAccount(userId)
 	if err != nil {
 		if s, ok := status.FromError(err); ok && s.Code() == codes.NotFound {
-			account, _ = newAccount(userId)
+			account = NewAccount(userId, domain)
 			account.Users[userId] = NewAdminUser(userId)
 			err = am.Store.SaveAccount(account)
 			if err != nil {
@@ -59,6 +59,14 @@ func (am *AccountManager) GetOrCreateAccountByUser(userId string) (*Account, err
 		}
 	}
 
+	if account.Domain != domain {
+		account.Domain = domain
+		err = am.Store.SaveAccount(account)
+		if err != nil {
+			return nil, status.Errorf(codes.Internal, "failed updating account with domain")
+		}
+	}
+
 	return account, nil
 }
 

signal/client/client.go

@@ -1,26 +1,11 @@
 package client
 
 import (
-	"context"
-	"crypto/tls"
 	"fmt"
-	"github.com/cenkalti/backoff/v4"
-	log "github.com/sirupsen/logrus"
-	"github.com/wiretrustee/wiretrustee/encryption"
 	"github.com/wiretrustee/wiretrustee/signal/proto"
 	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/connectivity"
-	"google.golang.org/grpc/credentials"
-	"google.golang.org/grpc/credentials/insecure"
-	"google.golang.org/grpc/keepalive"
-	"google.golang.org/grpc/metadata"
-	"google.golang.org/grpc/status"
 	"io"
 	"strings"
-	"sync"
-	"time"
 )
 
 // A set of tools to exchange connection details (Wireguard endpoints) with the remote peer.
@@ -31,311 +16,15 @@ type Status string
 const StreamConnected Status = "Connected"
 const StreamDisconnected Status = "Disconnected"
 
-// Client Wraps the Signal Exchange Service gRpc client
+type Client interface {
-type Client struct {
+	io.Closer
-	key        wgtypes.Key
+	StreamConnected() bool
-	realClient proto.SignalExchangeClient
+	GetStatus() Status
-	signalConn *grpc.ClientConn
+	Receive(msgHandler func(msg *proto.Message) error) error
-	ctx        context.Context
+	Ready() bool
-	stream     proto.SignalExchange_ConnectStreamClient
+	WaitStreamConnected()
-	// connectedCh used to notify goroutines waiting for the connection to the Signal stream
+	SendToStream(msg *proto.EncryptedMessage) error
-	connectedCh chan struct{}
+	Send(msg *proto.Message) error
-	mux         sync.Mutex
-	// StreamConnected indicates whether this client is StreamConnected to the Signal stream
-	status Status
-}
-
-func (c *Client) GetStatus() Status {
-	return c.status
-}
-
-// Close Closes underlying connections to the Signal Exchange
-func (c *Client) Close() error {
-	return c.signalConn.Close()
-}
-
-// NewClient creates a new Signal client
-func NewClient(ctx context.Context, addr string, key wgtypes.Key, tlsEnabled bool) (*Client, error) {
-
-	transportOption := grpc.WithTransportCredentials(insecure.NewCredentials())
-
-	if tlsEnabled {
-		transportOption = grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{}))
-	}
-
-	sigCtx, cancel := context.WithTimeout(ctx, 10*time.Second)
-	defer cancel()
-	conn, err := grpc.DialContext(
-		sigCtx,
-		addr,
-		transportOption,
-		grpc.WithBlock(),
-		grpc.WithKeepaliveParams(keepalive.ClientParameters{
-			Time:    15 * time.Second,
-			Timeout: 10 * time.Second,
-		}))
-
-	if err != nil {
-		log.Errorf("failed to connect to the signalling server %v", err)
-		return nil, err
-	}
-
-	return &Client{
-		realClient: proto.NewSignalExchangeClient(conn),
-		ctx:        ctx,
-		signalConn: conn,
-		key:        key,
-		mux:        sync.Mutex{},
-		status:     StreamDisconnected,
-	}, nil
-}
-
-//defaultBackoff is a basic backoff mechanism for general issues
-func defaultBackoff(ctx context.Context) backoff.BackOff {
-	return backoff.WithContext(&backoff.ExponentialBackOff{
-		InitialInterval:     800 * time.Millisecond,
-		RandomizationFactor: backoff.DefaultRandomizationFactor,
-		Multiplier:          backoff.DefaultMultiplier,
-		MaxInterval:         10 * time.Second,
-		MaxElapsedTime:      12 * time.Hour, //stop after 12 hours of trying, the error will be propagated to the general retry of the client
-		Stop:                backoff.Stop,
-		Clock:               backoff.SystemClock,
-	}, ctx)
-
-}
-
-// Receive Connects to the Signal Exchange message stream and starts receiving messages.
-// The messages will be handled by msgHandler function provided.
-// This function is blocking and reconnects to the Signal Exchange if errors occur (e.g. Exchange restart)
-// The connection retry logic will try to reconnect for 30 min and if wasn't successful will propagate the error to the function caller.
-func (c *Client) Receive(msgHandler func(msg *proto.Message) error) error {
-
-	var backOff = defaultBackoff(c.ctx)
-
-	operation := func() error {
-
-		c.notifyStreamDisconnected()
-
-		log.Debugf("signal connection state %v", c.signalConn.GetState())
-		if !c.ready() {
-			return fmt.Errorf("no connection to signal")
-		}
-
-		// connect to Signal stream identifying ourselves with a public Wireguard key
-		// todo once the key rotation logic has been implemented, consider changing to some other identifier (received from management)
-		stream, err := c.connect(c.key.PublicKey().String())
-		if err != nil {
-			log.Warnf("disconnected from the Signal Exchange due to an error: %v", err)
-			return err
-		}
-
-		c.notifyStreamConnected()
-
-		log.Infof("connected to the Signal Service stream")
-
-		// start receiving messages from the Signal stream (from other peers through signal)
-		err = c.receive(stream, msgHandler)
-		if err != nil {
-			log.Warnf("disconnected from the Signal Exchange due to an error: %v", err)
-			backOff.Reset()
-			return err
-		}
-
-		return nil
-	}
-
-	err := backoff.Retry(operation, backOff)
-	if err != nil {
-		log.Errorf("exiting Signal Service connection retry loop due to unrecoverable error: %s", err)
-		return err
-	}
-
-	return nil
-}
-func (c *Client) notifyStreamDisconnected() {
-	c.mux.Lock()
-	defer c.mux.Unlock()
-	c.status = StreamDisconnected
-}
-
-func (c *Client) notifyStreamConnected() {
-	c.mux.Lock()
-	defer c.mux.Unlock()
-	c.status = StreamConnected
-	if c.connectedCh != nil {
-		// there are goroutines waiting on this channel -> release them
-		close(c.connectedCh)
-		c.connectedCh = nil
-	}
-}
-
-func (c *Client) getStreamStatusChan() <-chan struct{} {
-	c.mux.Lock()
-	defer c.mux.Unlock()
-	if c.connectedCh == nil {
-		c.connectedCh = make(chan struct{})
-	}
-	return c.connectedCh
-}
-
-func (c *Client) connect(key string) (proto.SignalExchange_ConnectStreamClient, error) {
-	c.stream = nil
-
-	// add key fingerprint to the request header to be identified on the server side
-	md := metadata.New(map[string]string{proto.HeaderId: key})
-	ctx := metadata.NewOutgoingContext(c.ctx, md)
-
-	stream, err := c.realClient.ConnectStream(ctx, grpc.WaitForReady(true))
-
-	c.stream = stream
-	if err != nil {
-		return nil, err
-	}
-	// blocks
-	header, err := c.stream.Header()
-	if err != nil {
-		return nil, err
-	}
-	registered := header.Get(proto.HeaderRegistered)
-	if len(registered) == 0 {
-		return nil, fmt.Errorf("didn't receive a registration header from the Signal server whille connecting to the streams")
-	}
-
-	return stream, nil
-}
-
-// ready indicates whether the client is okay and ready to be used
-// for now it just checks whether gRPC connection to the service is in state Ready
-func (c *Client) ready() bool {
-	return c.signalConn.GetState() == connectivity.Ready
-}
-
-// WaitStreamConnected waits until the client is connected to the Signal stream
-func (c *Client) WaitStreamConnected() {
-
-	if c.status == StreamConnected {
-		return
-	}
-
-	ch := c.getStreamStatusChan()
-	select {
-	case <-c.ctx.Done():
-	case <-ch:
-	}
-}
-
-// SendToStream sends a message to the remote Peer through the Signal Exchange using established stream connection to the Signal Server
-// The Client.Receive method must be called before sending messages to establish initial connection to the Signal Exchange
-// Client.connWg can be used to wait
-func (c *Client) SendToStream(msg *proto.EncryptedMessage) error {
-	if !c.ready() {
-		return fmt.Errorf("no connection to signal")
-	}
-	if c.stream == nil {
-		return fmt.Errorf("connection to the Signal Exchnage has not been established yet. Please call Client.Receive before sending messages")
-	}
-
-	err := c.stream.Send(msg)
-	if err != nil {
-		log.Errorf("error while sending message to peer [%s] [error: %v]", msg.RemoteKey, err)
-		return err
-	}
-
-	return nil
-}
-
-// decryptMessage decrypts the body of the msg using Wireguard private key and Remote peer's public key
-func (c *Client) decryptMessage(msg *proto.EncryptedMessage) (*proto.Message, error) {
-	remoteKey, err := wgtypes.ParseKey(msg.GetKey())
-	if err != nil {
-		return nil, err
-	}
-
-	body := &proto.Body{}
-	err = encryption.DecryptMessage(remoteKey, c.key, msg.GetBody(), body)
-	if err != nil {
-		return nil, err
-	}
-
-	return &proto.Message{
-		Key:       msg.Key,
-		RemoteKey: msg.RemoteKey,
-		Body:      body,
-	}, nil
-}
-
-// encryptMessage encrypts the body of the msg using Wireguard private key and Remote peer's public key
-func (c *Client) encryptMessage(msg *proto.Message) (*proto.EncryptedMessage, error) {
-
-	remoteKey, err := wgtypes.ParseKey(msg.RemoteKey)
-	if err != nil {
-		return nil, err
-	}
-
-	encryptedBody, err := encryption.EncryptMessage(remoteKey, c.key, msg.Body)
-	if err != nil {
-		return nil, err
-	}
-
-	return &proto.EncryptedMessage{
-		Key:       msg.GetKey(),
-		RemoteKey: msg.GetRemoteKey(),
-		Body:      encryptedBody,
-	}, nil
-}
-
-// Send sends a message to the remote Peer through the Signal Exchange.
-func (c *Client) Send(msg *proto.Message) error {
-
-	if !c.ready() {
-		return fmt.Errorf("no connection to signal")
-	}
-
-	encryptedMessage, err := c.encryptMessage(msg)
-	if err != nil {
-		return err
-	}
-	_, err = c.realClient.Send(context.TODO(), encryptedMessage)
-	if err != nil {
-		//log.Errorf("error while sending message to peer [%s] [error: %v]", msg.RemoteKey, err)
-		return err
-	}
-
-	return nil
-}
-
-// receive receives messages from other peers coming through the Signal Exchange
-func (c *Client) receive(stream proto.SignalExchange_ConnectStreamClient,
-	msgHandler func(msg *proto.Message) error) error {
-
-	for {
-		msg, err := stream.Recv()
-		if s, ok := status.FromError(err); ok && s.Code() == codes.Canceled {
-			log.Warnf("stream canceled (usually indicates shutdown)")
-			return err
-		} else if s.Code() == codes.Unavailable {
-			log.Warnf("Signal Service is unavailable")
-			return err
-		} else if err == io.EOF {
-			log.Warnf("Signal Service stream closed by server")
-			return err
-		} else if err != nil {
-			return err
-		}
-		log.Debugf("received a new message from Peer [fingerprint: %s]", msg.Key)
-
-		decryptedMessage, err := c.decryptMessage(msg)
-		if err != nil {
-			log.Errorf("failed decrypting message of Peer [key: %s] error: [%s]", msg.Key, err.Error())
-		}
-
-		err = msgHandler(decryptedMessage)
-
-		if err != nil {
-			log.Errorf("error while handling message of Peer [key: %s] error: [%s]", msg.Key, err.Error())
-			//todo send something??
-		}
-	}
 }
 
 // UnMarshalCredential parses the credentials from the message and returns a Credential instance
@@ -363,7 +52,7 @@ func MarshalCredential(myKey wgtypes.Key, remoteKey wgtypes.Key, credential *Cre
 	}, nil
 }
 
-// Credential is an instance of a Client's Credential
+// Credential is an instance of a GrpcClient's Credential
 type Credential struct {
 	UFrag string
 	Pwd   string

signal/client/client_test.go

@@ -17,7 +17,7 @@ import (
 	"time"
 )
 
-var _ = Describe("Client", func() {
+var _ = Describe("GrpcClient", func() {
 
 	var (
 		addr     string
@@ -160,7 +160,7 @@ var _ = Describe("Client", func() {
 
 })
 
-func createSignalClient(addr string, key wgtypes.Key) *Client {
+func createSignalClient(addr string, key wgtypes.Key) *GrpcClient {
 	var sigTLSEnabled = false
 	client, err := NewClient(context.Background(), addr, key, sigTLSEnabled)
 	if err != nil {

signal/client/grpc.go

@@ -0,0 +1,336 @@
+package client
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"github.com/cenkalti/backoff/v4"
+	log "github.com/sirupsen/logrus"
+	"github.com/wiretrustee/wiretrustee/encryption"
+	"github.com/wiretrustee/wiretrustee/signal/proto"
+	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/connectivity"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/credentials/insecure"
+	"google.golang.org/grpc/keepalive"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
+	"io"
+	"sync"
+	"time"
+)
+
+// GrpcClient Wraps the Signal Exchange Service gRpc client
+type GrpcClient struct {
+	key        wgtypes.Key
+	realClient proto.SignalExchangeClient
+	signalConn *grpc.ClientConn
+	ctx        context.Context
+	stream     proto.SignalExchange_ConnectStreamClient
+	// connectedCh used to notify goroutines waiting for the connection to the Signal stream
+	connectedCh chan struct{}
+	mux         sync.Mutex
+	// StreamConnected indicates whether this client is StreamConnected to the Signal stream
+	status Status
+}
+
+func (c *GrpcClient) StreamConnected() bool {
+	return c.status == StreamConnected
+}
+
+func (c *GrpcClient) GetStatus() Status {
+	return c.status
+}
+
+// Close Closes underlying connections to the Signal Exchange
+func (c *GrpcClient) Close() error {
+	return c.signalConn.Close()
+}
+
+// NewClient creates a new Signal client
+func NewClient(ctx context.Context, addr string, key wgtypes.Key, tlsEnabled bool) (*GrpcClient, error) {
+
+	transportOption := grpc.WithTransportCredentials(insecure.NewCredentials())
+
+	if tlsEnabled {
+		transportOption = grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{}))
+	}
+
+	sigCtx, cancel := context.WithTimeout(ctx, time.Second*3)
+	defer cancel()
+	conn, err := grpc.DialContext(
+		sigCtx,
+		addr,
+		transportOption,
+		grpc.WithBlock(),
+		grpc.WithKeepaliveParams(keepalive.ClientParameters{
+			Time:    15 * time.Second,
+			Timeout: 10 * time.Second,
+		}))
+
+	if err != nil {
+		log.Errorf("failed to connect to the signalling server %v", err)
+		return nil, err
+	}
+
+	return &GrpcClient{
+		realClient: proto.NewSignalExchangeClient(conn),
+		ctx:        ctx,
+		signalConn: conn,
+		key:        key,
+		mux:        sync.Mutex{},
+		status:     StreamDisconnected,
+	}, nil
+}
+
+//defaultBackoff is a basic backoff mechanism for general issues
+func defaultBackoff(ctx context.Context) backoff.BackOff {
+	return backoff.WithContext(&backoff.ExponentialBackOff{
+		InitialInterval:     800 * time.Millisecond,
+		RandomizationFactor: backoff.DefaultRandomizationFactor,
+		Multiplier:          backoff.DefaultMultiplier,
+		MaxInterval:         10 * time.Second,
+		MaxElapsedTime:      12 * time.Hour, //stop after 12 hours of trying, the error will be propagated to the general retry of the client
+		Stop:                backoff.Stop,
+		Clock:               backoff.SystemClock,
+	}, ctx)
+
+}
+
+// Receive Connects to the Signal Exchange message stream and starts receiving messages.
+// The messages will be handled by msgHandler function provided.
+// This function is blocking and reconnects to the Signal Exchange if errors occur (e.g. Exchange restart)
+// The connection retry logic will try to reconnect for 30 min and if wasn't successful will propagate the error to the function caller.
+func (c *GrpcClient) Receive(msgHandler func(msg *proto.Message) error) error {
+
+	var backOff = defaultBackoff(c.ctx)
+
+	operation := func() error {
+
+		c.notifyStreamDisconnected()
+
+		log.Debugf("signal connection state %v", c.signalConn.GetState())
+		if !c.Ready() {
+			return fmt.Errorf("no connection to signal")
+		}
+
+		// connect to Signal stream identifying ourselves with a public Wireguard key
+		// todo once the key rotation logic has been implemented, consider changing to some other identifier (received from management)
+		stream, err := c.connect(c.key.PublicKey().String())
+		if err != nil {
+			log.Warnf("disconnected from the Signal Exchange due to an error: %v", err)
+			return err
+		}
+
+		c.notifyStreamConnected()
+
+		log.Infof("connected to the Signal Service stream")
+
+		// start receiving messages from the Signal stream (from other peers through signal)
+		err = c.receive(stream, msgHandler)
+		if err != nil {
+			log.Warnf("disconnected from the Signal Exchange due to an error: %v", err)
+			backOff.Reset()
+			return err
+		}
+
+		return nil
+	}
+
+	err := backoff.Retry(operation, backOff)
+	if err != nil {
+		log.Errorf("exiting Signal Service connection retry loop due to unrecoverable error: %s", err)
+		return err
+	}
+
+	return nil
+}
+func (c *GrpcClient) notifyStreamDisconnected() {
+	c.mux.Lock()
+	defer c.mux.Unlock()
+	c.status = StreamDisconnected
+}
+
+func (c *GrpcClient) notifyStreamConnected() {
+	c.mux.Lock()
+	defer c.mux.Unlock()
+	c.status = StreamConnected
+	if c.connectedCh != nil {
+		// there are goroutines waiting on this channel -> release them
+		close(c.connectedCh)
+		c.connectedCh = nil
+	}
+}
+
+func (c *GrpcClient) getStreamStatusChan() <-chan struct{} {
+	c.mux.Lock()
+	defer c.mux.Unlock()
+	if c.connectedCh == nil {
+		c.connectedCh = make(chan struct{})
+	}
+	return c.connectedCh
+}
+
+func (c *GrpcClient) connect(key string) (proto.SignalExchange_ConnectStreamClient, error) {
+	c.stream = nil
+
+	// add key fingerprint to the request header to be identified on the server side
+	md := metadata.New(map[string]string{proto.HeaderId: key})
+	ctx := metadata.NewOutgoingContext(c.ctx, md)
+
+	stream, err := c.realClient.ConnectStream(ctx, grpc.WaitForReady(true))
+
+	c.stream = stream
+	if err != nil {
+		return nil, err
+	}
+	// blocks
+	header, err := c.stream.Header()
+	if err != nil {
+		return nil, err
+	}
+	registered := header.Get(proto.HeaderRegistered)
+	if len(registered) == 0 {
+		return nil, fmt.Errorf("didn't receive a registration header from the Signal server whille connecting to the streams")
+	}
+
+	return stream, nil
+}
+
+// Ready indicates whether the client is okay and Ready to be used
+// for now it just checks whether gRPC connection to the service is in state Ready
+func (c *GrpcClient) Ready() bool {
+	return c.signalConn.GetState() == connectivity.Ready || c.signalConn.GetState() == connectivity.Idle
+}
+
+// WaitStreamConnected waits until the client is connected to the Signal stream
+func (c *GrpcClient) WaitStreamConnected() {
+
+	if c.status == StreamConnected {
+		return
+	}
+
+	ch := c.getStreamStatusChan()
+	select {
+	case <-c.ctx.Done():
+	case <-ch:
+	}
+}
+
+// SendToStream sends a message to the remote Peer through the Signal Exchange using established stream connection to the Signal Server
+// The GrpcClient.Receive method must be called before sending messages to establish initial connection to the Signal Exchange
+// GrpcClient.connWg can be used to wait
+func (c *GrpcClient) SendToStream(msg *proto.EncryptedMessage) error {
+	if !c.Ready() {
+		return fmt.Errorf("no connection to signal")
+	}
+	if c.stream == nil {
+		return fmt.Errorf("connection to the Signal Exchnage has not been established yet. Please call GrpcClient.Receive before sending messages")
+	}
+
+	err := c.stream.Send(msg)
+	if err != nil {
+		log.Errorf("error while sending message to peer [%s] [error: %v]", msg.RemoteKey, err)
+		return err
+	}
+
+	return nil
+}
+
+// decryptMessage decrypts the body of the msg using Wireguard private key and Remote peer's public key
+func (c *GrpcClient) decryptMessage(msg *proto.EncryptedMessage) (*proto.Message, error) {
+	remoteKey, err := wgtypes.ParseKey(msg.GetKey())
+	if err != nil {
+		return nil, err
+	}
+
+	body := &proto.Body{}
+	err = encryption.DecryptMessage(remoteKey, c.key, msg.GetBody(), body)
+	if err != nil {
+		return nil, err
+	}
+
+	return &proto.Message{
+		Key:       msg.Key,
+		RemoteKey: msg.RemoteKey,
+		Body:      body,
+	}, nil
+}
+
+// encryptMessage encrypts the body of the msg using Wireguard private key and Remote peer's public key
+func (c *GrpcClient) encryptMessage(msg *proto.Message) (*proto.EncryptedMessage, error) {
+
+	remoteKey, err := wgtypes.ParseKey(msg.RemoteKey)
+	if err != nil {
+		return nil, err
+	}
+
+	encryptedBody, err := encryption.EncryptMessage(remoteKey, c.key, msg.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	return &proto.EncryptedMessage{
+		Key:       msg.GetKey(),
+		RemoteKey: msg.GetRemoteKey(),
+		Body:      encryptedBody,
+	}, nil
+}
+
+// Send sends a message to the remote Peer through the Signal Exchange.
+func (c *GrpcClient) Send(msg *proto.Message) error {
+
+	if !c.Ready() {
+		return fmt.Errorf("no connection to signal")
+	}
+
+	encryptedMessage, err := c.encryptMessage(msg)
+	if err != nil {
+		return err
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*2)
+	defer cancel()
+	_, err = c.realClient.Send(ctx, encryptedMessage)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// receive receives messages from other peers coming through the Signal Exchange
+func (c *GrpcClient) receive(stream proto.SignalExchange_ConnectStreamClient,
+	msgHandler func(msg *proto.Message) error) error {
+
+	for {
+		msg, err := stream.Recv()
+		if s, ok := status.FromError(err); ok && s.Code() == codes.Canceled {
+			log.Warnf("stream canceled (usually indicates shutdown)")
+			return err
+		} else if s.Code() == codes.Unavailable {
+			log.Warnf("Signal Service is unavailable")
+			return err
+		} else if err == io.EOF {
+			log.Warnf("Signal Service stream closed by server")
+			return err
+		} else if err != nil {
+			return err
+		}
+		log.Debugf("received a new message from Peer [fingerprint: %s]", msg.Key)
+
+		decryptedMessage, err := c.decryptMessage(msg)
+		if err != nil {
+			log.Errorf("failed decrypting message of Peer [key: %s] error: [%s]", msg.Key, err.Error())
+		}
+
+		err = msgHandler(decryptedMessage)
+
+		if err != nil {
+			log.Errorf("error while handling message of Peer [key: %s] error: [%s]", msg.Key, err.Error())
+			//todo send something??
+		}
+	}
+}

signal/client/mock.go

@@ -0,0 +1,72 @@
+package client
+
+import (
+	"github.com/wiretrustee/wiretrustee/signal/proto"
+)
+
+type MockClient struct {
+	CloseFunc               func() error
+	GetStatusFunc           func() Status
+	StreamConnectedFunc     func() bool
+	ReadyFunc               func() bool
+	WaitStreamConnectedFunc func()
+	ReceiveFunc             func(msgHandler func(msg *proto.Message) error) error
+	SendToStreamFunc        func(msg *proto.EncryptedMessage) error
+	SendFunc                func(msg *proto.Message) error
+}
+
+func (sm *MockClient) Close() error {
+	if sm.CloseFunc == nil {
+		return nil
+	}
+	return sm.CloseFunc()
+}
+
+func (sm *MockClient) GetStatus() Status {
+	if sm.GetStatusFunc == nil {
+		return ""
+	}
+	return sm.GetStatusFunc()
+}
+
+func (sm *MockClient) StreamConnected() bool {
+	if sm.StreamConnectedFunc == nil {
+		return false
+	}
+	return sm.StreamConnectedFunc()
+}
+
+func (sm *MockClient) Ready() bool {
+	if sm.ReadyFunc == nil {
+		return false
+	}
+	return sm.ReadyFunc()
+}
+
+func (sm *MockClient) WaitStreamConnected() {
+	if sm.WaitStreamConnectedFunc == nil {
+		return
+	}
+	sm.WaitStreamConnectedFunc()
+}
+
+func (sm *MockClient) Receive(msgHandler func(msg *proto.Message) error) error {
+	if sm.ReceiveFunc == nil {
+		return nil
+	}
+	return sm.ReceiveFunc(msgHandler)
+}
+
+func (sm *MockClient) SendToStream(msg *proto.EncryptedMessage) error {
+	if sm.SendToStreamFunc == nil {
+		return nil
+	}
+	return sm.SendToStreamFunc(msg)
+}
+
+func (sm *MockClient) Send(msg *proto.Message) error {
+	if sm.SendFunc == nil {
+		return nil
+	}
+	return sm.SendFunc(msg)
+}

signal/cmd/run.go

@@ -74,10 +74,6 @@ var (
 				log.Fatalf("failed to listen: %v", err)
 			}
 
-			if err != nil {
-				log.Fatalf("failed to listen: %v", err)
-			}
-
 			proto.RegisterSignalExchangeServer(grpcServer, server.NewServer())
 			log.Printf("started server: localhost:%v", signalPort)
 			if err := grpcServer.Serve(lis); err != nil {

signal/peer/peer.go

@@ -55,7 +55,7 @@ func (registry *Registry) Register(peer *Peer) {
 	// can be that peer already exists but it is fine (e.g. reconnect)
 	// todo investigate what happens to the old peer (especially Peer.Stream) when we override it
 	registry.Peers.Store(peer.Id, peer)
-	log.Printf("registered peer [%s]", peer.Id)
+	log.Debugf("peer registered [%s]", peer.Id)
 
 }
 
@@ -63,7 +63,7 @@ func (registry *Registry) Register(peer *Peer) {
 func (registry *Registry) Deregister(peer *Peer) {
 	_, loaded := registry.Peers.LoadAndDelete(peer.Id)
 	if loaded {
-		log.Printf("deregistered peer [%s]", peer.Id)
+		log.Debugf("peer deregistered [%s]", peer.Id)
 	} else {
 		log.Warnf("attempted to remove non-existent peer [%s]", peer.Id)
 	}

signal/server/signal.go

@@ -29,18 +29,18 @@ func NewServer() *Server {
 func (s *Server) Send(ctx context.Context, msg *proto.EncryptedMessage) (*proto.EncryptedMessage, error) {
 
 	if !s.registry.IsPeerRegistered(msg.Key) {
-		return nil, fmt.Errorf("unknown peer %s", msg.Key)
+		return nil, fmt.Errorf("peer %s is not registered", msg.Key)
 	}
 
 	if dstPeer, found := s.registry.Get(msg.RemoteKey); found {
 		//forward the message to the target peer
 		err := dstPeer.Stream.Send(msg)
 		if err != nil {
-			log.Errorf("error while forwarding message from peer [%s] to peer [%s]", msg.Key, msg.RemoteKey)
+			log.Errorf("error while forwarding message from peer [%s] to peer [%s] %v", msg.Key, msg.RemoteKey, err)
 			//todo respond to the sender?
 		}
 	} else {
-		log.Warnf("message from peer [%s] can't be forwarded to peer [%s] because destination peer is not connected", msg.Key, msg.RemoteKey)
+		log.Debugf("message from peer [%s] can't be forwarded to peer [%s] because destination peer is not connected", msg.Key, msg.RemoteKey)
 		//todo respond to the sender?
 	}
 	return &proto.EncryptedMessage{}, nil
@@ -48,11 +48,17 @@ func (s *Server) Send(ctx context.Context, msg *proto.EncryptedMessage) (*proto.
 
 // ConnectStream connects to the exchange stream
 func (s *Server) ConnectStream(stream proto.SignalExchange_ConnectStreamServer) error {
+
 	p, err := s.connectPeer(stream)
 	if err != nil {
 		return err
 	}
 
+	defer func() {
+		log.Infof("peer disconnected [%s] ", p.Id)
+		s.registry.Deregister(p)
+	}()
+
 	//needed to confirm that the peer has been registered so that the client can proceed
 	header := metadata.Pairs(proto.HeaderRegistered, "1")
 	err = stream.SendHeader(header)
@@ -60,8 +66,10 @@ func (s *Server) ConnectStream(stream proto.SignalExchange_ConnectStreamServer)
 		return err
 	}
 
-	log.Infof("peer [%s] has successfully connected", p.Id)
+	log.Infof("peer connected [%s]", p.Id)
+
 	for {
+		//read incoming messages
 		msg, err := stream.Recv()
 		if err == io.EOF {
 			break
@@ -74,14 +82,13 @@ func (s *Server) ConnectStream(stream proto.SignalExchange_ConnectStreamServer)
 			//forward the message to the target peer
 			err := dstPeer.Stream.Send(msg)
 			if err != nil {
-				log.Errorf("error while forwarding message from peer [%s] to peer [%s]", p.Id, msg.RemoteKey)
+				log.Errorf("error while forwarding message from peer [%s] to peer [%s] %v", p.Id, msg.RemoteKey, err)
 				//todo respond to the sender?
 			}
 		} else {
-			log.Warnf("message from peer [%s] can't be forwarded to peer [%s] because destination peer is not connected", p.Id, msg.RemoteKey)
+			log.Debugf("message from peer [%s] can't be forwarded to peer [%s] because destination peer is not connected", p.Id, msg.RemoteKey)
 			//todo respond to the sender?
 		}
-
 	}
 	<-stream.Context().Done()
 	return stream.Context().Err()

util/common.go

@@ -0,0 +1,16 @@
+package util
+
+// SliceDiff returns the elements in slice `x` that are not in slice `y`
+func SliceDiff(x, y []string) []string {
+	mapY := make(map[string]struct{}, len(y))
+	for _, val := range y {
+		mapY[val] = struct{}{}
+	}
+	var diff []string
+	for _, val := range x {
+		if _, found := mapY[val]; !found {
+			diff = append(diff, val)
+		}
+	}
+	return diff
+}

util/file.go

@@ -12,7 +12,7 @@ import (
 // The output JSON is pretty-formatted
 func WriteJson(file string, obj interface{}) error {
 
-	configDir := filepath.Dir(file)
+	configDir, configFileName := filepath.Split(file)
 	err := os.MkdirAll(configDir, 0750)
 	if err != nil {
 		return err
@@ -24,7 +24,31 @@ func WriteJson(file string, obj interface{}) error {
 		return err
 	}
 
-	err = ioutil.WriteFile(file, bs, 0600)
+	tempFile, err := ioutil.TempFile(configDir, ".*"+configFileName)
+	if err != nil {
+		return err
+	}
+
+	tempFileName := tempFile.Name()
+	// closing file ops as windows doesn't allow to move it
+	err = tempFile.Close()
+	if err != nil {
+		return err
+	}
+
+	defer func() {
+		_, err = os.Stat(tempFileName)
+		if err == nil {
+			os.Remove(tempFileName)
+		}
+	}()
+
+	err = ioutil.WriteFile(tempFileName, bs, 0600)
+	if err != nil {
+		return err
+	}
+
+	err = os.Rename(tempFileName, file)
 	if err != nil {
 		return err
 	}

util/file_test.go

@@ -93,6 +93,12 @@ var _ = Describe("Client", func() {
 				_, err = io.Copy(hashDst, dstFile)
 				Expect(err).NotTo(HaveOccurred())
 
+				err = srcFile.Close()
+				Expect(err).NotTo(HaveOccurred())
+
+				err = dstFile.Close()
+				Expect(err).NotTo(HaveOccurred())
+
 				Expect(hex.EncodeToString(hashSrc.Sum(nil)[:16])).To(BeEquivalentTo(hex.EncodeToString(hashDst.Sum(nil)[:16])))
 			})
 		})