Improve ICE message we send.

- Dynamically set sdpMid, like browsers do.
- Send a usernameFragment, parsed from the sdp message.

diff --git a/laplace_client.py b/laplace_client.py
index 6ec2bb83862d92316459f285144701abe7cd0ff7..1b9c8f0eccd0acfc1179c486599e635b4fb74911 100755 (executable)
--- a/laplace_client.py
+++ b/laplace_client.py
@@ -31,6 +31,7 @@ class WebRTCClient:
         self.ssl_context.verify_mode = ssl.CERT_NONE
         self.websocket = None
         self.session_id = None
         self.ssl_context.verify_mode = ssl.CERT_NONE
         self.websocket = None
         self.session_id = None

+        self.userfragments = []

 
     def send_sdp_offer(self, offer):
         text = offer.sdp.as_text()
 
     def send_sdp_offer(self, offer):
         text = offer.sdp.as_text()


@@ -57,6 +58,9 @@ class WebRTCClient:
         promise.interrupt()
         self.send_sdp_offer(offer)
 
         promise.interrupt()
         self.send_sdp_offer(offer)
 

+        sdp = offer.sdp
+        self.userfragments = [sdp.get_media(i).get_attribute_val('ice-ufrag') for i in range(sdp.medias_len())]
+

     def on_negotiation_needed(self, element):
         log.info('on_negotiation_needed')
         promise = Gst.Promise.new_with_change_func(self.on_offer_created, element, None)
     def on_negotiation_needed(self, element):
         log.info('on_negotiation_needed')
         promise = Gst.Promise.new_with_change_func(self.on_offer_created, element, None)


@@ -68,8 +72,9 @@ class WebRTCClient:
             'Type': 'addCalleeIceCandidate',
             'Value': json.dumps({
                 "candidate": candidate,
             'Type': 'addCalleeIceCandidate',
             'Value': json.dumps({
                 "candidate": candidate,

-                "sdpMid": "0",
+                "sdpMid": f"{mlineindex}",

                 "sdpMLineIndex": mlineindex,
                 "sdpMLineIndex": mlineindex,

+                "usernameFragment": self.userfragments[mlineindex],

                 })
             })
         log.info(f'send_ice_candidate_message with {icemsg}')
                 })
             })
         log.info(f'send_ice_candidate_message with {icemsg}')