1 files changed, 80 insertions, 0 deletions
diff --git a/pkg/server/socket/defer.go b/pkg/server/socket/defer.go
new file mode 100644
index 0000000..bfb2157
--- /dev/null
+++ b/pkg/server/socket/defer.go
@@ -0,0 +1,80 @@
+package socket
+
+import (
+	"tunnel/pkg/server/env"
+	"tunnel/pkg/server/queue"
+)
+
+type deferSocket struct {
+	S
+}
+
+type deferChannel struct {
+	s *deferSocket
+	c chan Channel
+	e env.Env
+}
+
+func newDeferSocket(proto, addr string) (S, error) {
+	s, err := newDialSocket(proto, addr)
+	if err != nil {
+		return s, err
+	}
+
+	return &deferSocket{s}, nil
+}
+
+func (s *deferSocket) Open(env env.Env) (Channel, error) {
+	c := &deferChannel{
+		s: s,
+		c: make(chan Channel),
+		e: env,
+	}
+
+	return c, nil
+}
+
+func (c *deferChannel) String() string {
+	return "defer"
+}
+
+func (c *deferChannel) Send(wq queue.Q) error {
+	if x := <-c.c; x == nil {
+		return nil
+	} else {
+		return x.Send(wq)
+	}
+}
+
+func (c *deferChannel) Recv(rq queue.Q) error {
+	b := <-rq
+	if b == nil {
+		close(c.c)
+		return nil
+	}
+
+	x, err := c.s.S.Open(c.e)
+	if err != nil {
+		close(c.c)
+		return err
+	}
+
+	c.c <- x
+
+	q := queue.New()
+
+	go func() {
+		q <- b
+		queue.Copy(rq, q)
+		close(q)
+	}()
+
+	defer q.Dry()
+
+	return x.Recv(q)
+}
+
+/* TODO */
+func (c *deferChannel) Close() error {
+	return nil
+}