I have been sending OPTIONS requests both programatically (my own code),
manually via SIP VERIFY PEER x and automatcially by setting verify=yes in
sip.conf. The trouble is I do not see anything except an ACK 200 come back
from endpoints and it does not contain any SDP/codec info. . My goal is to
determine audio and video codec capability in advance of a call INVITE. I
notice the Asterisk generated OPTIONS does not specify any Accept header (ie
Accept=application/sdp). I was thinking maybe that is why I don't get any
SDP coming back. My own code generated OPTIONS includes the Accept header
and still I see no SDP.
Is Anyone able to query codec capability for any endpoints? I would like to
know how you do so.
Below is excerpt from the automatic OPTIONS query I see in the sip logs from
setting verify=true. No Accept header. Does anyone believe that to be the
problem? Notice the response has content length=0 and no SDP. Any ideas
appreciated
OPTIONS sip:991 at 192.168.1.4:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.1.2:5060;branch=z9hG4bK7f05f169
Max-Forwards: 70
From: "asterisk" <sip:asterisk at 192.168.1.2>;tag=as1fd2a50c
To: <sip:991 at 192.168.1.4:5060>
Contact: <sip:asterisk at 192.168.1.2:5060>
Call-ID: 010fdb653903a2022b99ed1d40c0b8db at 192.168.1.2:5060
CSeq: 102 OPTIONS
User-Agent: Asterisk PBX 1.8.6.0
Date: Mon, 24 Oct 2011 19:14:47 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO,
PUBLISH
Supported: replaces, timer
Content-Length: 0
<--- SIP read from UDP:192.168.1.4:5060 --->
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.1.2:5060;branch=z9hG4bK7f05f169
From: "asterisk" <sip:asterisk at 192.168.1.2>;tag=as1fd2a50c
To: <sip:991 at 192.168.1.4:5060>;tag=003d3418e2fce011b081701a0413e3f3
Call-ID: 010fdb653903a2022b99ed1d40c0b8db at 192.168.1.2:5060
CSeq: 102 OPTIONS
Contact: <sip:991 at 192.168.1.4:5060>
Allow: INVITE, OPTIONS, ACK, BYE, CANCEL, INFO, NOTIFY, MESSAGE, UPDATE
Server: SIPPER for PhonerLite
Content-Length: 0
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.digium.com/pipermail/asterisk-users/attachments/20111025/fef06a6d/attachment.htm>
