[ http://tracker.iptel.org/browse/SER-369?page=all ]
Jan Janak resolved SER-369.
---------------------------
Resolution: Won't Fix
See the comments.
> force_rtp_proxy does rewrite session-level connection data if media-level
> connection data is present
> ----------------------------------------------------------------------------------------------------
>
> Key: SER-369
> URL: http://tracker.iptel.org/browse/SER-369
> Project: SER
> Issue Type: Improvement
> Components: NAT Traversal
> Affects Versions: 2.0
> Reporter: Marcus Better
> Priority: Minor
>
> Some SIP clients, e.g. SJPhone 1.65, create session descriptions with two c=
> lines, one session-level and one media-level:
> v=0
> o=- 3415474221 3415474221 IN IP4 192.168.2.102
> s=SJphone
> c=IN IP4 192.168.2.102
> t=0 0
> m=audio 49152 RTP/AVP 3 97 98 8 0 101
> c=IN IP4 192.168.2.102
> a=rtpmap:3 GSM/8000
> a=rtpmap:97 iLBC/8000
> a=rtpmap:98 iLBC/8000
> a=fmtp:98 mode=20
> a=rtpmap:8 PCMA/8000
> a=rtpmap:0 PCMU/8000
> a=rtpmap:101 telephone-event/8000
> a=fmtp:101 0-16
> a=setup:active
> a=sendrecv
> This is rewritten by force_rtp_proxy into:
> v=0
> o=- 3415474221 3415474221 IN IP4 192.168.2.102
> s=SJphone
> c=IN IP4 192.168.2.102
> t=0 0
> m=audio 35262 RTP/AVP 3 97 98 8 0 101
> c=IN IP4 10.1.2.3
> a=rtpmap:3 GSM/8000
> a=rtpmap:97 iLBC/8000
> a=rtpmap:98 iLBC/8000
> a=fmtp:98 mode=20
> a=rtpmap:8 PCMA/8000
> a=rtpmap:0 PCMU/8000
> a=rtpmap:101 telephone-event/8000
> a=fmtp:101 0-16
> a=setup:active
> a=sendrecv
> a=nortpproxy:yes
> As you see, only the media-level c entry was rewritten. This is technically
> OK since it takes precedence over the session-level connection data, but it
> seems to confuse broken SIP endpoints, and it looks a bit odd. For instance
> it seems the Asterisk echo server at [EMAIL PROTECTED] has problems with this
> (need to verify this).
> It would seem more logical to rewrite all c= lines in the same way.
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