Refactor: Move Signal server and client (#80)

* Move Signal Server

* Move Signal Client

* Cleanup duplicates and unused files

* Moved Signal client tests

cmd/signal.go

@@ -6,8 +6,8 @@ import (
 	log "github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"github.com/wiretrustee/wiretrustee/encryption"
-	sig "github.com/wiretrustee/wiretrustee/signal"
 	sigProto "github.com/wiretrustee/wiretrustee/signal/proto"
+	"github.com/wiretrustee/wiretrustee/signal/server"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/keepalive"
@@ -65,7 +65,7 @@ var (
 				log.Fatalf("failed to listen: %v", err)
 			}
 
-			sigProto.RegisterSignalExchangeServer(grpcServer, sig.NewServer())
+			sigProto.RegisterSignalExchangeServer(grpcServer, server.NewServer())
 			log.Printf("started server: localhost:%v", signalPort)
 			if err := grpcServer.Serve(lis); err != nil {
 				log.Fatalf("failed to serve: %v", err)

cmd/up.go

@@ -2,6 +2,7 @@ package cmd
 
 import (
 	"context"
+	signal "github.com/wiretrustee/wiretrustee/signal/client"
 	"io"
 	"os"
 	"strings"
@@ -12,7 +13,6 @@ import (
 	"github.com/wiretrustee/wiretrustee/connection"
 	"github.com/wiretrustee/wiretrustee/encryption"
 	mgm "github.com/wiretrustee/wiretrustee/management/proto"
-	sig "github.com/wiretrustee/wiretrustee/signal"
 	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
@@ -44,7 +44,7 @@ var (
 
 			var sigTLSEnabled = false
 			ctx := context.Background()
-			signalClient, err := sig.NewClient(ctx, config.SignalAddr, myKey, sigTLSEnabled)
+			signalClient, err := signal.NewClient(ctx, config.SignalAddr, myKey, sigTLSEnabled)
 			if err != nil {
 				log.Errorf("error while connecting to the Signal Exchange Service %s: %s", config.SignalAddr, err)
 				os.Exit(ExitSetupFailed)