chore(nix): fix hash for updated go dependencies

Bumps the prod-patch-updates group with 2 updates in the / directory: [github.com/gaissmai/bart](https://github.com/gaissmai/bart) and [google.golang.org/grpc](https://github.com/grpc/grpc-go).


Updates `github.com/gaissmai/bart` from 0.26.0 to 0.26.1
- [Release notes](https://github.com/gaissmai/bart/releases)
- [Commits](https://github.com/gaissmai/bart/compare/v0.26.0...v0.26.1)

Updates `google.golang.org/grpc` from 1.79.1 to 1.79.2
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.79.1...v1.79.2)

---
updated-dependencies:
- dependency-name: github.com/gaissmai/bart
  dependency-version: 0.26.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: prod-patch-updates
- dependency-name: google.golang.org/grpc
  dependency-version: 1.79.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: prod-patch-updates
...

Signed-off-by: dependabot[bot] <support@github.com>

clients/clients.go

@@ -2,8 +2,6 @@ package clients
 
 import (
 	"context"
-	"crypto/rand"
-	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"net"
@@ -36,7 +34,6 @@ type WgConfig struct {
 	IpAddress string   `json:"ipAddress"`
 	Peers     []Peer   `json:"peers"`
 	Targets   []Target `json:"targets"`
-	ChainId   string   `json:"chainId"`
 }
 
 type Target struct {
@@ -85,8 +82,7 @@ type WireGuardService struct {
 	host          string
 	serverPubKey  string
 	token         string
-	stopGetConfig        func()
-	pendingConfigChainId string
+	stopGetConfig func()
 	// Netstack fields
 	tun    tun.Device
 	tnet   *netstack2.Net
@@ -111,13 +107,6 @@ type WireGuardService struct {
 	wgTesterServer     *wgtester.Server
 }
 
-// generateChainId generates a random chain ID for deduplicating round-trip messages.
-func generateChainId() string {
-	b := make([]byte, 8)
-	_, _ = rand.Read(b)
-	return hex.EncodeToString(b)
-}
-
 func NewWireGuardService(interfaceName string, port uint16, mtu int, host string, newtId string, wsClient *websocket.Client, dns string, useNativeInterface bool) (*WireGuardService, error) {
 	key, err := wgtypes.GeneratePrivateKey()
 	if err != nil {
@@ -452,12 +441,9 @@ func (s *WireGuardService) LoadRemoteConfig() error {
 		s.stopGetConfig()
 		s.stopGetConfig = nil
 	}
-	chainId := generateChainId()
-	s.pendingConfigChainId = chainId
 	s.stopGetConfig = s.client.SendMessageInterval("newt/wg/get-config", map[string]interface{}{
 		"publicKey": s.key.PublicKey().String(),
 		"port":      s.Port,
-		"chainId":   chainId,
 	}, 2*time.Second)
 
 	logger.Debug("Requesting WireGuard configuration from remote server")
@@ -482,17 +468,6 @@ func (s *WireGuardService) handleConfig(msg websocket.WSMessage) {
 		logger.Info("Error unmarshaling target data: %v", err)
 		return
 	}
-
-	// Deduplicate using chainId: discard responses that don't match the
-	// pending request, or that we have already processed.
-	if config.ChainId != "" {
-		if config.ChainId != s.pendingConfigChainId {
-			logger.Debug("Discarding duplicate/stale newt/wg/get-config response (chainId=%s, expected=%s)", config.ChainId, s.pendingConfigChainId)
-			return
-		}
-		s.pendingConfigChainId = "" // consume – further duplicates are rejected
-	}
-
 	s.config = config
 
 	if s.stopGetConfig != nil {

common.go

@@ -285,18 +285,11 @@ func startPingCheck(tnet *netstack.Net, serverIP string, client *websocket.Clien
 							if tunnelID != "" {
 								telemetry.IncReconnect(context.Background(), tunnelID, "client", telemetry.ReasonTimeout)
 							}
-							pingChainId := generateChainId()
-							pendingPingChainId = pingChainId
-							stopFunc = client.SendMessageInterval("newt/ping/request", map[string]interface{}{
-								"chainId": pingChainId,
-							}, 3*time.Second)
+							stopFunc = client.SendMessageInterval("newt/ping/request", map[string]interface{}{}, 3*time.Second)
 							// Send registration message to the server for backward compatibility
-							bcChainId := generateChainId()
-							pendingRegisterChainId = bcChainId
 							err := client.SendMessage("newt/wg/register", map[string]interface{}{
 								"publicKey":           publicKey.String(),
 								"backwardsCompatible": true,
-								"chainId":             bcChainId,
 							})
 							if err != nil {
 								logger.Error("Failed to send registration message: %v", err)

flake.nix

@@ -35,7 +35,7 @@
             inherit version;
             src = pkgs.nix-gitignore.gitignoreSource [ ] ./.;
 
-            vendorHash = "sha256-kmQM8Yy5TuOiNpMpUme/2gfE+vrhUK+0AphN+p71wGs=";
+            vendorHash = "sha256-u7iQCKF8Jh1o0OQoPK4jSmO5pKMl9yT5Sj4GD2UuTU8=";
 
             nativeInstallCheckInputs = [ pkgs.versionCheckHook ];
 

go.mod

@@ -4,7 +4,7 @@ go 1.25.0
 
 require (
 	github.com/docker/docker v28.5.2+incompatible
-	github.com/gaissmai/bart v0.26.0
+	github.com/gaissmai/bart v0.26.1
 	github.com/gorilla/websocket v1.5.3
 	github.com/prometheus/client_golang v1.23.2
 	github.com/vishvananda/netlink v1.3.1
@@ -24,7 +24,7 @@ require (
 	golang.zx2c4.com/wireguard v0.0.0-20250521234502-f333402bd9cb
 	golang.zx2c4.com/wireguard/wgctrl v0.0.0-20241231184526-a9ab2273dd10
 	golang.zx2c4.com/wireguard/windows v0.5.3
-	google.golang.org/grpc v1.79.1
+	google.golang.org/grpc v1.79.2
 	gopkg.in/yaml.v3 v3.0.1
 	gvisor.dev/gvisor v0.0.0-20250503011706-39ed1f5ac29c
 	software.sslmate.com/src/go-pkcs12 v0.7.0

go.sum

@@ -26,8 +26,8 @@ github.com/docker/go-units v0.4.0 h1:3uh0PgVws3nIA0Q+MwDC8yjEPf9zjRfZZWXZYDct3Tw
 github.com/docker/go-units v0.4.0/go.mod h1:fgPhTUdO+D/Jk86RDLlptpiXQzgHJF7gydDDbaIK4Dk=
 github.com/felixge/httpsnoop v1.0.4 h1:NFTV2Zj1bL4mc9sqWACXbQFVBBg2W3GPvqp8/ESS2Wg=
 github.com/felixge/httpsnoop v1.0.4/go.mod h1:m8KPJKqk1gH5J9DgRY2ASl2lWCfGKXixSwevea8zH2U=
-github.com/gaissmai/bart v0.26.0 h1:xOZ57E9hJLBiQaSyeZa9wgWhGuzfGACgqp4BE77OkO0=
-github.com/gaissmai/bart v0.26.0/go.mod h1:GREWQfTLRWz/c5FTOsIw+KkscuFkIV5t8Rp7Nd1Td5c=
+github.com/gaissmai/bart v0.26.1 h1:+w4rnLGNlA2GDVn382Tfe3jOsK5vOr5n4KmigJ9lbTo=
+github.com/gaissmai/bart v0.26.1/go.mod h1:GREWQfTLRWz/c5FTOsIw+KkscuFkIV5t8Rp7Nd1Td5c=
 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
 github.com/go-logr/logr v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
 github.com/go-logr/logr v1.4.3/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
@@ -159,8 +159,8 @@ google.golang.org/genproto/googleapis/api v0.0.0-20260209200024-4cfbd4190f57 h1:
 google.golang.org/genproto/googleapis/api v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:kSJwQxqmFXeo79zOmbrALdflXQeAYcUbgS7PbpMknCY=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57 h1:mWPCjDEyshlQYzBpMNHaEof6UX1PmHcaUODUywQ0uac=
 google.golang.org/genproto/googleapis/rpc v0.0.0-20260209200024-4cfbd4190f57/go.mod h1:j9x/tPzZkyxcgEFkiKEEGxfvyumM01BEtsW8xzOahRQ=
-google.golang.org/grpc v1.79.1 h1:zGhSi45ODB9/p3VAawt9a+O/MULLl9dpizzNNpq7flY=
-google.golang.org/grpc v1.79.1/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
+google.golang.org/grpc v1.79.2 h1:fRMD94s2tITpyJGtBBn7MkMseNpOZU8ZxgC3MMBaXRU=
+google.golang.org/grpc v1.79.2/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
 google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

healthcheck/healthcheck.go

@@ -5,9 +5,7 @@ import (
 	"crypto/tls"
 	"encoding/json"
 	"fmt"
-	"net"
 	"net/http"
-	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -367,12 +365,11 @@ func (m *Monitor) performHealthCheck(target *Target) {
 	target.LastCheck = time.Now()
 	target.LastError = ""
 
-	// Build URL (use net.JoinHostPort to properly handle IPv6 addresses with ports)
-	host := target.Config.Hostname
+	// Build URL
+	url := fmt.Sprintf("%s://%s", target.Config.Scheme, target.Config.Hostname)
 	if target.Config.Port > 0 {
-		host = net.JoinHostPort(target.Config.Hostname, strconv.Itoa(target.Config.Port))
+		url = fmt.Sprintf("%s:%d", url, target.Config.Port)
 	}
-	url := fmt.Sprintf("%s://%s", target.Config.Scheme, host)
 	if target.Config.Path != "" {
 		if !strings.HasPrefix(target.Config.Path, "/") {
 			url += "/"

main.go

@@ -3,16 +3,13 @@ package main
 import (
 	"bytes"
 	"context"
-	"crypto/rand"
 	"crypto/tls"
-	"encoding/hex"
 	"encoding/json"
 	"errors"
 	"flag"
 	"fmt"
 	"net"
 	"net/http"
-	"net/http/pprof"
 	"net/netip"
 	"os"
 	"os/signal"
@@ -48,7 +45,6 @@ type WgData struct {
 	TunnelIP           string               `json:"tunnelIP"`
 	Targets            TargetsByType        `json:"targets"`
 	HealthCheckTargets []healthcheck.Config `json:"healthCheckTargets"`
-	ChainId            string               `json:"chainId"`
 }
 
 type TargetsByType struct {
@@ -62,7 +58,6 @@ type TargetData struct {
 
 type ExitNodeData struct {
 	ExitNodes []ExitNode `json:"exitNodes"`
-	ChainId   string     `json:"chainId"`
 }
 
 // ExitNode represents an exit node with an ID, endpoint, and weight.
@@ -132,8 +127,6 @@ var (
 	publicKey                          wgtypes.Key
 	pingStopChan                       chan struct{}
 	stopFunc                           func()
-	pendingRegisterChainId             string
-	pendingPingChainId                 string
 	healthFile                         string
 	useNativeInterface                 bool
 	authorizedKeysFile                 string
@@ -154,7 +147,6 @@ var (
 	adminAddr         string
 	region            string
 	metricsAsyncBytes bool
-	pprofEnabled      bool
 	blueprintFile     string
 	noCloud           bool
 
@@ -167,13 +159,6 @@ var (
 	tlsPrivateKey string
 )
 
-// generateChainId generates a random chain ID for deduplicating round-trip messages.
-func generateChainId() string {
-	b := make([]byte, 8)
-	_, _ = rand.Read(b)
-	return hex.EncodeToString(b)
-}
-
 func main() {
 	// Check for subcommands first (only principals exits early)
 	if len(os.Args) > 1 {
@@ -240,7 +225,6 @@ func runNewtMain(ctx context.Context) {
 	adminAddrEnv := os.Getenv("NEWT_ADMIN_ADDR")
 	regionEnv := os.Getenv("NEWT_REGION")
 	asyncBytesEnv := os.Getenv("NEWT_METRICS_ASYNC_BYTES")
-	pprofEnabledEnv := os.Getenv("NEWT_PPROF_ENABLED")
 
 	disableClientsEnv := os.Getenv("DISABLE_CLIENTS")
 	disableClients = disableClientsEnv == "true"
@@ -406,14 +390,6 @@ func runNewtMain(ctx context.Context) {
 			metricsAsyncBytes = v
 		}
 	}
-	// pprof debug endpoint toggle
-	if pprofEnabledEnv == "" {
-		flag.BoolVar(&pprofEnabled, "pprof", false, "Enable pprof debug endpoints on admin server")
-	} else {
-		if v, err := strconv.ParseBool(pprofEnabledEnv); err == nil {
-			pprofEnabled = v
-		}
-	}
 	// Optional region flag (resource attribute)
 	if regionEnv == "" {
 		flag.StringVar(&region, "region", "", "Optional region resource attribute (also NEWT_REGION)")
@@ -509,14 +485,6 @@ func runNewtMain(ctx context.Context) {
 		if tel.PrometheusHandler != nil {
 			mux.Handle("/metrics", tel.PrometheusHandler)
 		}
-		if pprofEnabled {
-			mux.HandleFunc("/debug/pprof/", pprof.Index)
-			mux.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
-			mux.HandleFunc("/debug/pprof/profile", pprof.Profile)
-			mux.HandleFunc("/debug/pprof/symbol", pprof.Symbol)
-			mux.HandleFunc("/debug/pprof/trace", pprof.Trace)
-			logger.Info("pprof debugging enabled on %s/debug/pprof/", tcfg.AdminAddr)
-		}
 		admin := &http.Server{
 			Addr:              tcfg.AdminAddr,
 			Handler:           otelhttp.NewHandler(mux, "newt-admin"),
@@ -719,24 +687,6 @@ func runNewtMain(ctx context.Context) {
 		defer func() {
 			telemetry.IncSiteRegistration(ctx, regResult)
 		}()
-
-		// Deduplicate using chainId: if the server echoes back a chainId we have
-		// already consumed (or one that doesn't match our current pending request),
-		// throw the message away to avoid setting up the tunnel twice.
-		var chainData struct {
-			ChainId string `json:"chainId"`
-		}
-		if jsonBytes, err := json.Marshal(msg.Data); err == nil {
-			_ = json.Unmarshal(jsonBytes, &chainData)
-		}
-		if chainData.ChainId != "" {
-			if chainData.ChainId != pendingRegisterChainId {
-				logger.Debug("Discarding duplicate/stale newt/wg/connect (chainId=%s, expected=%s)", chainData.ChainId, pendingRegisterChainId)
-				return
-			}
-			pendingRegisterChainId = "" // consume – further duplicates with this id are rejected
-		}
-
 		if stopFunc != nil {
 			stopFunc()     // stop the ws from sending more requests
 			stopFunc = nil // reset stopFunc to nil to avoid double stopping
@@ -921,11 +871,8 @@ persistent_keepalive_interval=5`, util.FixKey(privateKey.String()), util.FixKey(
 		}
 
 		// Request exit nodes from the server
-		pingChainId := generateChainId()
-		pendingPingChainId = pingChainId
 		stopFunc = client.SendMessageInterval("newt/ping/request", map[string]interface{}{
 			"noCloud": noCloud,
-			"chainId": pingChainId,
 		}, 3*time.Second)
 
 		logger.Info("Tunnel destroyed, ready for reconnection")
@@ -954,7 +901,6 @@ persistent_keepalive_interval=5`, util.FixKey(privateKey.String()), util.FixKey(
 
 	client.RegisterHandler("newt/ping/exitNodes", func(msg websocket.WSMessage) {
 		logger.Debug("Received ping message")
-
 		if stopFunc != nil {
 			stopFunc()     // stop the ws from sending more requests
 			stopFunc = nil // reset stopFunc to nil to avoid double stopping
@@ -974,14 +920,6 @@ persistent_keepalive_interval=5`, util.FixKey(privateKey.String()), util.FixKey(
 		}
 		exitNodes := exitNodeData.ExitNodes
 
-		if exitNodeData.ChainId != "" {
-			if exitNodeData.ChainId != pendingPingChainId {
-				logger.Debug("Discarding duplicate/stale newt/ping/exitNodes (chainId=%s, expected=%s)", exitNodeData.ChainId, pendingPingChainId)
-				return
-			}
-			pendingPingChainId = "" // consume – further duplicates with this id are rejected
-		}
-
 		if len(exitNodes) == 0 {
 			logger.Info("No exit nodes provided")
 			return
@@ -1014,13 +952,10 @@ persistent_keepalive_interval=5`, util.FixKey(privateKey.String()), util.FixKey(
 				},
 			}
 
-			chainId := generateChainId()
-			pendingRegisterChainId = chainId
 			stopFunc = client.SendMessageInterval(topicWGRegister, map[string]interface{}{
 				"publicKey":   publicKey.String(),
 				"pingResults": pingResults,
 				"newtVersion": newtVersion,
-				"chainId":     chainId,
 			}, 2*time.Second)
 
 			return
@@ -1120,13 +1055,10 @@ persistent_keepalive_interval=5`, util.FixKey(privateKey.String()), util.FixKey(
 		}
 
 		// Send the ping results to the cloud for selection
-		chainId := generateChainId()
-		pendingRegisterChainId = chainId
 		stopFunc = client.SendMessageInterval(topicWGRegister, map[string]interface{}{
 			"publicKey":   publicKey.String(),
 			"pingResults": pingResults,
 			"newtVersion": newtVersion,
-			"chainId":     chainId,
 		}, 2*time.Second)
 
 		logger.Debug("Sent exit node ping results to cloud for selection: pingResults=%+v", pingResults)
@@ -1776,11 +1708,8 @@ persistent_keepalive_interval=5`, util.FixKey(privateKey.String()), util.FixKey(
 				stopFunc()
 			}
 			// request from the server the list of nodes to ping
-			pingChainId := generateChainId()
-			pendingPingChainId = pingChainId
 			stopFunc = client.SendMessageInterval("newt/ping/request", map[string]interface{}{
 				"noCloud": noCloud,
-				"chainId": pingChainId,
 			}, 3*time.Second)
 			logger.Debug("Requesting exit nodes from server")
 
@@ -1792,13 +1721,10 @@ persistent_keepalive_interval=5`, util.FixKey(privateKey.String()), util.FixKey(
 		}
 
 		// Send registration message to the server for backward compatibility
-		bcChainId := generateChainId()
-		pendingRegisterChainId = bcChainId
 		err := client.SendMessage(topicWGRegister, map[string]interface{}{
 			"publicKey":           publicKey.String(),
 			"newtVersion":         newtVersion,
 			"backwardsCompatible": true,
-			"chainId":             bcChainId,
 		})
 
 		sendBlueprint(client)

proxy/manager.go

@@ -21,10 +21,7 @@ import (
 	"gvisor.dev/gvisor/pkg/tcpip/adapters/gonet"
 )
 
-const (
-	errUnsupportedProtoFmt = "unsupported protocol: %s"
-	maxUDPPacketSize       = 65507
-)
+const errUnsupportedProtoFmt = "unsupported protocol: %s"
 
 // Target represents a proxy target with its address and port
 type Target struct {
@@ -108,9 +105,13 @@ func classifyProxyError(err error) string {
 	if errors.Is(err, net.ErrClosed) {
 		return "closed"
 	}
-	var ne net.Error
-	if errors.As(err, &ne) && ne.Timeout() {
-		return "timeout"
+	if ne, ok := err.(net.Error); ok {
+		if ne.Timeout() {
+			return "timeout"
+		}
+		if ne.Temporary() {
+			return "temporary"
+		}
 	}
 	msg := strings.ToLower(err.Error())
 	switch {
@@ -436,6 +437,14 @@ func (pm *ProxyManager) Stop() error {
 		pm.udpConns = append(pm.udpConns[:i], pm.udpConns[i+1:]...)
 	}
 
+	// // Clear the target maps
+	// for k := range pm.tcpTargets {
+	// 	delete(pm.tcpTargets, k)
+	// }
+	// for k := range pm.udpTargets {
+	// 	delete(pm.udpTargets, k)
+	// }
+
 	// Give active connections a chance to close gracefully
 	time.Sleep(100 * time.Millisecond)
 
@@ -489,7 +498,7 @@ func (pm *ProxyManager) handleTCPProxy(listener net.Listener, targetAddr string)
 			if !pm.running {
 				return
 			}
-			if errors.Is(err, net.ErrClosed) {
+			if ne, ok := err.(net.Error); ok && !ne.Temporary() {
 				logger.Info("TCP listener closed, stopping proxy handler for %v", listener.Addr())
 				return
 			}
@@ -555,7 +564,7 @@ func (pm *ProxyManager) handleTCPProxy(listener net.Listener, targetAddr string)
 }
 
 func (pm *ProxyManager) handleUDPProxy(conn *gonet.UDPConn, targetAddr string) {
-	buffer := make([]byte, maxUDPPacketSize) // Max UDP packet size
+	buffer := make([]byte, 65507) // Max UDP packet size
 	clientConns := make(map[string]*net.UDPConn)
 	var clientsMutex sync.RWMutex
 
@@ -574,7 +583,7 @@ func (pm *ProxyManager) handleUDPProxy(conn *gonet.UDPConn, targetAddr string) {
 			}
 
 			// Check for connection closed conditions
-			if errors.Is(err, io.EOF) || errors.Is(err, net.ErrClosed) {
+			if err == io.EOF || strings.Contains(err.Error(), "use of closed network connection") {
 				logger.Info("UDP connection closed, stopping proxy handler")
 
 				// Clean up existing client connections
@@ -653,14 +662,10 @@ func (pm *ProxyManager) handleUDPProxy(conn *gonet.UDPConn, targetAddr string) {
 					telemetry.IncProxyConnectionEvent(context.Background(), tunnelID, "udp", telemetry.ProxyConnectionClosed)
 				}()
 
-				buffer := make([]byte, maxUDPPacketSize)
+				buffer := make([]byte, 65507)
 				for {
 					n, _, err := targetConn.ReadFromUDP(buffer)
 					if err != nil {
-						// Connection closed is normal during cleanup
-						if errors.Is(err, net.ErrClosed) || errors.Is(err, io.EOF) {
-							return // defer will handle cleanup, result stays "success"
-						}
 						logger.Error("Error reading from target: %v", err)
 						result = "failure"
 						return // defer will handle cleanup