fix dh-ipc sdp error

vendor/github.com/pixelbender/go-sdp/sdp/decoder.go

@@ -247,11 +247,8 @@ func (d *Decoder) origin(v string) (*Origin, error) {
 		return nil, errFormat
 	}
 	o := new(Origin)
-	o.Username, o.Network, o.Type, o.Address = p[0], p[3], p[4], p[5]
+	o.Username, o.SessionID, o.Network, o.Type, o.Address = p[0], p[1], p[3], p[4], p[5]
 	var err error
-	if o.SessionID, err = d.int(p[1]); err != nil {
-		return nil, err
-	}
 	if o.SessionVersion, err = d.int(p[2]); err != nil {
 		return nil, err
 	}

vendor/github.com/pixelbender/go-sdp/sdp/encoder.go

@@ -203,7 +203,7 @@ func (e *Encoder) key(k *Key) *Encoder {
 }
 
 func (e *Encoder) origin(o *Origin) *Encoder {
-	return e.str(strd(o.Username, "-")).sp().int(o.SessionID).sp().int(o.SessionVersion).sp().transport(o.Network, o.Type, o.Address)
+	return e.str(strd(o.Username, "-")).sp().str(o.SessionID).sp().int(o.SessionVersion).sp().transport(o.Network, o.Type, o.Address)
 }
 
 func (e *Encoder) connection(c *Connection) *Encoder {

vendor/github.com/pixelbender/go-sdp/sdp/sdp.go

@@ -40,8 +40,18 @@ func (s *Session) Bytes() []byte {
 
 // Origin represents an originator of the session.
 type Origin struct {
-	Username       string
-	SessionID      int64
+	Username string
+	/**
+		<sess-id> is a numeric string such that the tuple of <username>,
+	      <sess-id>, <nettype>, <addrtype>, and <unicast-address> forms a
+	      globally unique identifier for the session.  The method of
+	      <sess-id> allocation is up to the creating tool, but it has been
+	      suggested that a Network Time Protocol (NTP) format timestamp be
+	      used to ensure uniqueness [13].
+
+		some IPC do is a string. ie.  o=RTSP Session 0 0 IN IP4 0.0.0.0
+	*/
+	SessionID      string
 	SessionVersion int64
 	Network        string
 	Type           string
@@ -137,7 +147,7 @@ func NegotiateMode(local, remote string) string {
 }
 
 // DeleteAttr removes all elements with name from attrs.
-func DeleteAttr(attrs Attributes, name ... string) Attributes {
+func DeleteAttr(attrs Attributes, name ...string) Attributes {
 	n := 0
 loop:
 	for _, it := range attrs {