Add call protocol, Rmux. Update AmneziaWG. Fixes and improvements

transport/call/tunnel/config_ack.go

@@ -0,0 +1,69 @@
+package tunnel
+
+import (
+	"fmt"
+	"sync"
+	"time"
+
+	"github.com/sagernet/sing/common/logger"
+)
+
+const configResendPeriod = 3 * time.Second
+
+type ConfigAckTracker struct {
+	mu        sync.Mutex
+	acked     chan struct{}
+	cancel    chan struct{}
+	confirmed bool
+}
+
+func (t *ConfigAckTracker) Acknowledged() bool {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	return t.confirmed
+}
+
+func (t *ConfigAckTracker) Arm() (acked, cancel chan struct{}) {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	if t.cancel != nil {
+		close(t.cancel)
+	}
+	t.acked = make(chan struct{})
+	t.cancel = make(chan struct{})
+	return t.acked, t.cancel
+}
+
+func (t *ConfigAckTracker) Mark() {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	t.confirmed = true
+	if t.acked == nil {
+		return
+	}
+	select {
+	case <-t.acked:
+	default:
+		close(t.acked)
+	}
+}
+
+func SendVP8ConfigUntilAcked(acked, cancel <-chan struct{}, stopCh <-chan struct{}, tun DataTunnel, fps, batch, trackCount int, logger logger.ContextLogger, logPrefix string) {
+	tun.SendData(EncodeVP8Config(fps, batch, trackCount))
+	ticker := time.NewTicker(configResendPeriod)
+	defer ticker.Stop()
+	for {
+		select {
+		case <-acked:
+			return
+		case <-cancel:
+			return
+		case <-stopCh:
+			return
+		case <-ticker.C:
+			logger.Debug(fmt.Sprintf("%s: resending vp8 config fps=%d batch=%d trackCount=%d, no ack yet",
+				logPrefix, fps, batch, trackCount))
+			tun.SendData(EncodeVP8Config(fps, batch, trackCount))
+		}
+	}
+}