rtsp: keep track of server ip and ipv6

Keep track of how the client connected to the server and setup the udp ports
with the same protocol.
Copy the server ip address in the SDP so that clients can send RTCP back to
us.

gst/rtsp-server/rtsp-client.h

@@ -61,6 +61,7 @@ typedef struct _GstRTSPClientClass GstRTSPClientClass;
  * @connection: the connection object handling the client request.
  * @watch: watch for the connection
  * @watchid: id of the watch
+ * @ip: ip address used by the client to connect to us
  * @session_pool: handle to the session pool used by the client.
  * @media_mapping: handle to the media mapping used by the client.
  * @uri: cached uri
@@ -76,6 +77,8 @@ struct _GstRTSPClient {
   GstRTSPConnection *connection;
   GstRTSPWatch      *watch;
   guint              watchid;
+  gchar             *server_ip;
+  gboolean           is_ipv6;
 
   GstRTSPSessionPool   *session_pool;
   GstRTSPMediaMapping  *media_mapping;

gst/rtsp-server/rtsp-media.c

@@ -539,7 +539,7 @@ gst_rtsp_media_stream_rtcp (GstRTSPMediaStream * stream, GstBuffer * buffer)
 
 /* Allocate the udp ports and sockets */
 static gboolean
-alloc_udp_ports (GstRTSPMediaStream * stream, gboolean is_ipv6)
+alloc_udp_ports (GstRTSPMedia * media, GstRTSPMediaStream * stream)
 {
   GstStateChangeReturn ret;
   GstElement *udpsrc0, *udpsrc1;
@@ -558,7 +558,7 @@ alloc_udp_ports (GstRTSPMediaStream * stream, gboolean is_ipv6)
   /* Start with random port */
   tmp_rtp = 0;
 
-  if (is_ipv6)
+  if (media->is_ipv6)
     host = "udp://[::0]";
   else
     host = "udp://0.0.0.0";
@@ -922,7 +922,7 @@ setup_stream (GstRTSPMediaStream * stream, guint idx, GstRTSPMedia * media)
   /* allocate udp ports, we will have 4 of them, 2 for receiving RTP/RTCP and 2
    * for sending RTP/RTCP. The sender and receiver ports are shared between the
    * elements */
-  if (!alloc_udp_ports (stream, FALSE))
+  if (!alloc_udp_ports (media, stream))
     return FALSE;
 
   /* add the ports to the pipeline */

gst/rtsp-server/rtsp-media.h

@@ -191,6 +191,7 @@ struct _GstRTSPMedia {
   gboolean           shared;
   gboolean           reusable;
   gboolean           reused;
+  gboolean           is_ipv6;
 
   GstElement        *element;
   GArray            *streams;

gst/rtsp-server/rtsp-sdp.c

@@ -22,16 +22,18 @@
 
 /**
  * gst_rtsp_sdp_from_media:
+ * @sdp: a #GstSDPessage
+ * @info: info
  * @media: a #GstRTSPMedia
  *
- * Create a new sdp message for @media.
+ * Add @media specific info to @sdp. @info is used to configure the connection
+ * information in the SDP.
  *
- * Returns: a new sdp message for @media. gst_sdp_message_free() after usage.
+ * Returns: TRUE on success.
  */
-GstSDPMessage *
+gboolean
-gst_rtsp_sdp_from_media (GstRTSPMedia * media)
+gst_rtsp_sdp_from_media (GstSDPMessage *sdp, GstSDPInfo *info, GstRTSPMedia * media)
 {
-  GstSDPMessage *sdp;
   guint i, n_streams;
   gchar *rangestr;
 
@@ -40,19 +42,6 @@ gst_rtsp_sdp_from_media (GstRTSPMedia * media)
 
   n_streams = gst_rtsp_media_n_streams (media);
 
-  gst_sdp_message_new (&sdp);
-
-  /* some standard things first */
-  gst_sdp_message_set_version (sdp, "0");
-
-  gst_sdp_message_set_origin (sdp, "-", "1188340656180883", "1", "IN", "IP4",
-      "127.0.0.1");
-  gst_sdp_message_set_session_name (sdp, "Session streamed with GStreamer");
-  gst_sdp_message_set_information (sdp, "rtsp-server");
-  gst_sdp_message_add_time (sdp, "0", "0", NULL);
-  gst_sdp_message_add_attribute (sdp, "tool", "GStreamer");
-  gst_sdp_message_add_attribute (sdp, "type", "broadcast");
-  gst_sdp_message_add_attribute (sdp, "control", "*");
   rangestr = gst_rtsp_range_to_string (&media->range);
   gst_sdp_message_add_attribute (sdp, "range", rangestr);
   g_free (rangestr);
@@ -96,7 +85,7 @@ gst_rtsp_sdp_from_media (GstRTSPMedia * media)
     gst_sdp_media_set_proto (smedia, "RTP/AVP");
 
     /* for the c= line */
-    gst_sdp_media_add_connection (smedia, "IN", "IP4", "127.0.0.1", 0, 0);
+    gst_sdp_media_add_connection (smedia, "IN", info->server_proto, info->server_ip, 0, 0);
 
     /* get clock-rate, media type and params for the rtpmap attribute */
     gst_structure_get_int (s, "clock-rate", &caps_rate);
@@ -163,12 +152,12 @@ gst_rtsp_sdp_from_media (GstRTSPMedia * media)
     gst_sdp_media_free (smedia);
   }
 
-  return sdp;
+  return TRUE;
 
   /* ERRORS */
 not_prepared:
   {
     GST_ERROR ("media %p is not prepared", media);
-    return NULL;
+    return FALSE;
   }
 }

gst/rtsp-server/rtsp-sdp.h

@@ -27,8 +27,13 @@
 
 G_BEGIN_DECLS
 
+typedef struct {
+  const gchar *server_proto;
+  const gchar *server_ip;
+} GstSDPInfo;
+
 /* creating SDP */
-GstSDPMessage *     gst_rtsp_sdp_from_media      (GstRTSPMedia *media);
+gboolean            gst_rtsp_sdp_from_media      (GstSDPMessage *sdp, GstSDPInfo *info, GstRTSPMedia * media);
 
 G_END_DECLS
 

gst/rtsp-server/rtsp-server.c

@@ -425,7 +425,7 @@ gst_rtsp_server_sink_init_send (GstRTSPServer * server)
   memset(&hints, 0, sizeof(struct addrinfo));
   hints.ai_family = AF_UNSPEC;     /* Allow IPv4 or IPv6 */
   hints.ai_socktype = SOCK_STREAM; /* stream socket */
-  hints.ai_flags = AI_PASSIVE;     /* For wildcard IP address */
+  hints.ai_flags = AI_PASSIVE | AI_CANONNAME;     /* For wildcard IP address */
   hints.ai_protocol = 0;           /* Any protocol */
   hints.ai_canonname = NULL;
   hints.ai_addr = NULL;
@@ -446,8 +446,10 @@ gst_rtsp_server_sink_init_send (GstRTSPServer * server)
       continue;
     }
 
-    if (bind (sockfd, rp->ai_addr, rp->ai_addrlen) == 0)
+    if (bind (sockfd, rp->ai_addr, rp->ai_addrlen) == 0) {
+      GST_DEBUG_OBJECT (server, "bind on %s", rp->ai_canonname);
       break;
+    }
 
     GST_DEBUG_OBJECT (server, "failed to bind socket (%s), try next", g_strerror (errno));
     close (sockfd);
@@ -654,7 +656,7 @@ gst_rtsp_server_create_watch (GstRTSPServer *server)
     channel = gst_rtsp_server_get_io_channel (server);
     if (channel == NULL)
       goto no_channel;
-     
+
     /* create a watch for reads (new connections) and possible errors */
     server->io_watch = g_io_create_watch (channel, G_IO_IN |
                   G_IO_ERR | G_IO_HUP | G_IO_NVAL);
@@ -682,7 +684,7 @@ no_channel:
  * This function should be called when the server properties and urls are fully
  * configured and the server is ready to start.
  *
- * Returns: the ID (greater than 0) for the source within the GMainContext. 
+ * Returns: the ID (greater than 0) for the source within the GMainContext.
  */
 guint
 gst_rtsp_server_attach (GstRTSPServer *server, GMainContext *context)