all: Implement suture v4-api (#6947)

cmd/strelaysrv/main.go

@@ -3,6 +3,7 @@
 package main
 
 import (
+	"context"
 	"crypto/tls"
 	"flag"
 	"fmt"
@@ -194,7 +195,9 @@ func main() {
 	mapping := mapping{natSvc.NewMapping(nat.TCP, addr.IP, addr.Port)}
 
 	if natEnabled {
-		go natSvc.Serve()
+		ctx, cancel := context.WithCancel(context.Background())
+		go natSvc.Serve(ctx)
+		defer cancel()
 		found := make(chan struct{})
 		mapping.OnChanged(func(_ *nat.Mapping, _, _ []nat.Address) {
 			select {

cmd/strelaysrv/testutil/main.go

@@ -20,7 +20,8 @@ import (
 )
 
 func main() {
-	ctx := context.Background()
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
 
 	log.SetOutput(os.Stdout)
 	log.SetFlags(log.LstdFlags | log.Lshortfile)
@@ -62,7 +63,7 @@ func main() {
 		}
 		log.Println("Created client")
 
-		go relay.Serve()
+		go relay.Serve(ctx)
 
 		recv := make(chan protocol.SessionInvitation)