Hi, all!
Preamble:
I got new equipment - videophone. I tried to make it work with OpenSER
(version 1.1.0).
Schema:
VIDEOPHONE -> OpenSER -> VIDEOPHONE
I tried to make simple call.
It works but not behind NAT.
With rtpproxy OpenSER logs show such messages:
ERROR: force_rtp_proxy2: can't extract media port from the message
Calls last only few seconds than it get disconnected.
With mediaproxy OpenSER logs show following:
Oct 16 18:01:22 sip mediaproxy[20251]: error: uncaptured python
exception, closing channel <rtphandler.CommandHandler connected '' at 0x68
2ecc> (exceptions.ValueError:invalid literal for int(): 5012/1
[/usr/lib/python2.3/asyncore.pyc|readwrite|86] [/usr/lib/python2.3/asyncore
.pyc|handle_read_event|390]
[/usr/local/mediaproxy/modules/rtphandler.py|handle_read|441]
[/usr/local/mediaproxy/modules/rtphandler.py|pro
cess|531] [/usr/local/mediaproxy/modules/rtphandler.py|__init__|988]
[/usr/local/mediaproxy/modules/rtphandler.py|setCaller|880])
I found that source of these troubles is that videophone generates
INVITE`s in different format than for example Sipura does.
Media streams are described like these:
m=audio 5012/1 RTP/AVP 98 0 8.
m=video 5010/1 RTP/SAVPF 99.
As you can see, sub-field "port" is not in usual format, but it contains
number of ports according to RFC2327:
m=<media> <port>/<number of ports> <transport> <fmt list>
So, I spended few hours examinating sources of rtpproxy and mediaproxy
modules and made small trick (patch) to mediaproxy module.
I didn't understand logic of rtpproxy module because lack of time.
Here it is:
--- ./modules/mediaproxy/mediaproxy.c 2006-03-24 21:04:56 +0300
+++ ./modules/mediaproxy/mediaproxy_new.c 2006-10-17 17:53:54 +0400
@@ -825,7 +825,7 @@
getMediaStreams(str *sdp, str *sessionIP, StreamInfo *streams, int limit)
{
str tokens[2], block, zone;
- char *ptr, *sdpEnd;
+ char *ptr, *sdpEnd, *tmpptr;
int i, count, streamCount, result;
sdpEnd = sdp->s + sdp->len;
@@ -845,6 +845,9 @@
"line in SDP body\n");
return -1;
}
+
+ tmpptr=strchr(tokens[1].s,'/');
+ if ((tmpptr-tokens[1].s)<tokens[1].len )
tokens[1].len=tmpptr-tokens[1].s;
streams[i].type = tokens[0];
streams[i].port = tokens[1];
It works for me, but I know it is not correct solution.
I hope my small investigation would be useful.
Thanks for your attention.
With best regards,
Artur Yakupov
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