package tunnel import ( "os" "sync" "testing" "time" "github.com/micro/go-micro/v3/transport" ) func testBrokenTunAccept(t *testing.T, tun Tunnel, wait chan bool, wg *sync.WaitGroup) { defer wg.Done() // listen on some virtual address tl, err := tun.Listen("test-tunnel") if err != nil { t.Fatal(err) } // receiver ready; notify sender wait <- true // accept a connection c, err := tl.Accept() if err != nil { t.Fatal(err) } // accept the message and close the tunnel // we do this to simulate loss of network connection m := new(transport.Message) if err := c.Recv(m); err != nil { t.Fatal(err) } // close all the links for _, link := range tun.Links() { link.Close() } // receiver ready; notify sender wait <- true // accept the message m = new(transport.Message) if err := c.Recv(m); err != nil { t.Fatal(err) } // notify the sender we have received wait <- true } func testBrokenTunSend(t *testing.T, tun Tunnel, wait chan bool, wg *sync.WaitGroup, reconnect time.Duration) { defer wg.Done() // wait for the listener to get ready <-wait // dial a new session c, err := tun.Dial("test-tunnel") if err != nil { t.Fatal(err) } defer c.Close() m := transport.Message{ Header: map[string]string{ "test": "send", }, } // send the message if err := c.Send(&m); err != nil { t.Fatal(err) } // wait for the listener to get ready <-wait // give it time to reconnect time.Sleep(reconnect) // send the message if err := c.Send(&m); err != nil { t.Fatal(err) } // wait for the listener to receive the message // c.Send merely enqueues the message to the link send queue and returns // in order to verify it was received we wait for the listener to tell us <-wait } // testAccept will accept connections on the transport, create a new link and tunnel on top func testAccept(t *testing.T, tun Tunnel, wait chan bool, wg *sync.WaitGroup) { defer wg.Done() // listen on some virtual address tl, err := tun.Listen("test-tunnel") if err != nil { t.Fatal(err) } // receiver ready; notify sender wait <- true // accept a connection c, err := tl.Accept() if err != nil { t.Fatal(err) } // get a message // accept the message m := new(transport.Message) if err := c.Recv(m); err != nil { t.Fatal(err) } if v := m.Header["test"]; v != "send" { t.Fatalf("Accept side expected test:send header. Received: %s", v) } // now respond m.Header["test"] = "accept" if err := c.Send(m); err != nil { t.Fatal(err) } wait <- true return } // testSend will create a new link to an address and then a tunnel on top func testSend(t *testing.T, tun Tunnel, wait chan bool, wg *sync.WaitGroup) { defer wg.Done() // wait for the listener to get ready <-wait // dial a new session c, err := tun.Dial("test-tunnel") if err != nil { t.Fatal(err) } defer c.Close() m := transport.Message{ Header: map[string]string{ "test": "send", }, } // send the message if err := c.Send(&m); err != nil { t.Fatal(err) } // now wait for the response mr := new(transport.Message) if err := c.Recv(mr); err != nil { t.Fatal(err) } <-wait if v := mr.Header["test"]; v != "accept" { t.Fatalf("Message not received from accepted side. Received: %s", v) } } func TestTunnel(t *testing.T) { // create a new tunnel client tunA := NewTunnel( Address("127.0.0.1:9096"), Nodes("127.0.0.1:9097"), ) // create a new tunnel server tunB := NewTunnel( Address("127.0.0.1:9097"), ) // start tunB err := tunB.Connect() if err != nil { t.Fatal(err) } defer tunB.Close() // start tunA err = tunA.Connect() if err != nil { t.Fatal(err) } defer tunA.Close() wait := make(chan bool) var wg sync.WaitGroup wg.Add(1) // start the listener go testAccept(t, tunB, wait, &wg) wg.Add(1) // start the client go testSend(t, tunA, wait, &wg) // wait until done wg.Wait() } func TestLoopbackTunnel(t *testing.T) { // create a new tunnel tun := NewTunnel( Address("127.0.0.1:9096"), Nodes("127.0.0.1:9096"), ) // start tunnel err := tun.Connect() if err != nil { t.Fatal(err) } defer tun.Close() time.Sleep(500 * time.Millisecond) wait := make(chan bool) var wg sync.WaitGroup wg.Add(1) // start the listener go testAccept(t, tun, wait, &wg) wg.Add(1) // start the client go testSend(t, tun, wait, &wg) // wait until done wg.Wait() } func TestTunnelRTTRate(t *testing.T) { // create a new tunnel client tunA := NewTunnel( Address("127.0.0.1:9096"), Nodes("127.0.0.1:9097"), ) // create a new tunnel server tunB := NewTunnel( Address("127.0.0.1:9097"), ) // start tunB err := tunB.Connect() if err != nil { t.Fatal(err) } defer tunB.Close() // start tunA err = tunA.Connect() if err != nil { t.Fatal(err) } defer tunA.Close() wait := make(chan bool) var wg sync.WaitGroup wg.Add(1) // start the listener go testAccept(t, tunB, wait, &wg) wg.Add(1) // start the client go testSend(t, tunA, wait, &wg) // wait until done wg.Wait() if len(os.Getenv("IN_TRAVIS_CI")) == 0 { // only needed for debug for _, link := range tunA.Links() { t.Logf("Link %s length %v rate %v", link.Id(), link.Length(), link.Rate()) } for _, link := range tunB.Links() { t.Logf("Link %s length %v rate %v", link.Id(), link.Length(), link.Rate()) } } } func TestReconnectTunnel(t *testing.T) { // we manually override the tunnel.ReconnectTime value here // this is so that we make the reconnects faster than the default 5s ReconnectTime = 200 * time.Millisecond // create a new tunnel client tunA := NewTunnel( Address("127.0.0.1:9098"), Nodes("127.0.0.1:9099"), ) // create a new tunnel server tunB := NewTunnel( Address("127.0.0.1:9099"), ) // start tunnel err := tunB.Connect() if err != nil { t.Fatal(err) } defer tunB.Close() // start tunnel err = tunA.Connect() if err != nil { t.Fatal(err) } defer tunA.Close() wait := make(chan bool) var wg sync.WaitGroup wg.Add(1) // start tunnel listener go testBrokenTunAccept(t, tunB, wait, &wg) wg.Add(1) // start tunnel sender go testBrokenTunSend(t, tunA, wait, &wg, ReconnectTime*5) // wait until done wg.Wait() }