Hi Bemali,
Please check if the port on which SDP negotiation for video is blocked
by some firewall. Sometimes OS default settings blocks certain ports. Please
check using the respective OS commands.
ICMP doesn't seem to be related to either SIP or SDP, its something to
do with socket layer.
Thanks,
Manjunath
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Bemali
Wickramanayake
Sent: Thursday, June 10, 2010 9:46 PM
To: [email protected]
Subject: [Sip-implementors] ICCMP error : Destination port unreachable
Hi all,
I'm implementing a SIP phone using RTC Client and Streamcoders RTP AV source
filter (only sourcing audio and video). I get the signalling part completely
OK, and the call gets connected after a successful SDP negotiation. Also RTP
AV source filter also gets connected successfully and I could load all the
parameters (ports, codecs, resolutions, IPs etc.) to the source filter as
well. But the video doesn't display at the destination end (which is my
application).
So I used Wireshark packet analyzer to view my packets. It shows that PCMA
and H.263 packets getting received from the remote party, but my machine
responds with an " ICMP Destination unreachable (Port unreachable)" packet
immediately after each media packet reception.
Please can anyone suggest a way to overcome this problem???
However to add a bit of information, instead of specifying the session type
as "sendonly" I have specified it as "sendrecv" in my SDP. Wonder if this
creates the problem.
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