support ipv6 link-local addresses; fix #6

main.go

@@ -199,7 +199,8 @@ func (p *program) forwardTrack(path string, id int, flow trackFlow, frame []byte
 				if flow == _TRACK_FLOW_RTP {
 					p.rtpl.chanWrite <- &udpWrite{
 						addr: &net.UDPAddr{
-							IP:   c.ip,
+							IP:   c.ip(),
+							Zone: c.zone(),
 							Port: c.streamTracks[id].rtpPort,
 						},
 						buf: frame,
@@ -207,7 +208,8 @@ func (p *program) forwardTrack(path string, id int, flow trackFlow, frame []byte
 				} else {
 					p.rtcpl.chanWrite <- &udpWrite{
 						addr: &net.UDPAddr{
-							IP:   c.ip,
+							IP:   c.ip(),
+							Zone: c.zone(),
 							Port: c.streamTracks[id].rtcpPort,
 						},
 						buf: frame,

server-client.go

@@ -107,7 +107,6 @@ type serverClient struct {
 	p               *program
 	conn            *gortsplib.ConnServer
 	state           clientState
-	ip              net.IP
 	path            string
 	as              *gortsplib.AuthServer
 	streamSdpText   []byte       // filled only if publisher
@@ -164,6 +163,14 @@ func (c *serverClient) log(format string, args ...interface{}) {
 		fmt.Sprintf(format, args...))
 }
 
+func (c *serverClient) ip() net.IP {
+	return c.conn.NetConn().RemoteAddr().(*net.TCPAddr).IP
+}
+
+func (c *serverClient) zone() string {
+	return c.conn.NetConn().RemoteAddr().(*net.TCPAddr).Zone
+}
+
 func (c *serverClient) run() {
 	defer func() {
 		if c.p.postScript != "" {
@@ -183,9 +190,6 @@ func (c *serverClient) run() {
 		c.close()
 	}()
 
-	ipstr, _, _ := net.SplitHostPort(c.conn.NetConn().RemoteAddr().String())
-	c.ip = net.ParseIP(ipstr)
-
 	c.log("connected")
 
 	if c.p.preScript != "" {

server-udpl.go

@@ -68,7 +68,7 @@ func (l *serverUdpListener) run() {
 				path, trackId := func() (string, int) {
 					for _, pub := range l.p.publishers {
 						for i, t := range pub.streamTracks {
-							if !pub.ip.Equal(addr.IP) {
+							if !pub.ip().Equal(addr.IP) {
 								continue
 							}