On dinsdag 25 juni 2019 13:39:32 CEST r...@yandex.ru wrote: > That's the same dialog, 100rel present there in subsequent SIP/183. > > Let me show the call flow. Substituted calling, called, IPs etc.
You're showing 3 different (early) dialogs (compare to-tags). > Can the last SIP/183 be considered as incorrect from > https://tools.ietf.org/html/rfc3264#section-8 perspective, because there is > "c=" added to media level and "o=" origin must be the same (as previous) > except the version must increment by one. The above rules only apply within the same dialog. As you're looking at 3 different dialogs, the SDP's are unrelated to each other. > INVITE sip:+called_num@req_uri_host:5060;user=phone SIP/2.0 > Via: SIP/2.0/UDP calling_VIA:5060;branch=z9hG4bK04B3fb4750baf5bf89b > From: "calling_name" > <sip:+calling_num@calling_VIA;user=phone>;tag=gK046df8ed To: > <sip:+called_num@req_uri_host;user=phone> > Call-ID: 52701823_134068140@calling_VIA > CSeq: 533420 INVITE > Max-Forwards: 70 > Allow: > INVITE,ACK,CANCEL,BYE,REGISTER,REFER,INFO,SUBSCRIBE,NOTIFY,PRACK,UPDATE,OPT > IONS,MESSAGE,PUBLISH Accept: application/sdp, application/isup, > application/dtmf, application/dtmf-relay, multipart/mixed Contact: > "calling_name" <sip:+calling_num@calling_VIA:5060> > Supported: timer,100rel,precondition,replaces > Session-Expires: 1800 > Min-SE: 90 > Content-Length: 182 > Content-Disposition: session; handling=required > Content-Type: application/sdp > > v=0 > o=username_1 252686 420906 IN IP4 calling_VIA > s=session_1 > c=IN IP4 calling_media_IP > t=0 0 > m=audio 19250 RTP/AVP 0 > a=rtpmap:0 PCMU/8000 > a=sendrecv > a=maxptime:20 > > SIP/2.0 100 Trying > Via: SIP/2.0/UDP calling_VIA:5060;branch=z9hG4bK04B3fb4750baf5bf89b > From: "calling_name" > <sip:+calling_num@calling_VIA;user=phone>;tag=gK046df8ed To: > <sip:+called_num@req_uri_host;user=phone> > Call-ID: 52701823_134068140@calling_VIA > CSeq: 533420 INVITE > Content-Length: 0 > > > SIP/2.0 183 Session Progress > Via: SIP/2.0/UDP calling_VIA:5060;branch=z9hG4bK04B3fb4750baf5bf89b > To: <sip:+called_num@req_uri_host;user=phone>;tag=bc6ce47f4s > From: "calling_name" > <sip:+calling_num@calling_VIA;user=phone>;tag=gK046df8ed Call-ID: > 52701823_134068140@calling_VIA > CSeq: 533420 INVITE > Contact: <sip:called_num@req_uri_host:5060> > P-Asserted-Identity: <sip:called_num@P_IP_1;user=phone> > Remote-Party-ID: <sip:called_num@P_IP_1;user=phone> > Content-Type: application/sdp > Content-Length: 149 > > v=0 > o=username_2 188 1 IN IP4 req_uri_host > s=session_2 > c=IN IP4 called_media_IP_1 > t=0 0 > m=audio 20158 RTP/AVP 0 > a=rtpmap:0 PCMU/8000 > > > SIP/2.0 183 Session Progress > Via: SIP/2.0/UDP calling_VIA:5060;branch=z9hG4bK04B3fb4750baf5bf89b > To: <sip:+called_num@req_uri_host;user=phone>;tag=bc6ce47f4s > From: "calling_name" > <sip:+calling_num@calling_VIA;user=phone>;tag=gK046df8ed Call-ID: > 52701823_134068140@calling_VIA > CSeq: 533420 INVITE > Contact: <sip:called_num@req_uri_host:5060> > P-Asserted-Identity: <sip:called_num@P_IP_1;user=phone> > Remote-Party-ID: <sip:called_num@P_IP_1;user=phone> > Content-Type: application/sdp > Content-Length: 149 > > v=0 > o=username_2 188 1 IN IP4 req_uri_host > s=session_2 > c=IN IP4 called_media_IP_1 > t=0 0 > m=audio 20158 RTP/AVP 0 > a=rtpmap:0 PCMU/8000 > > > SIP/2.0 183 Session Progress > Via: SIP/2.0/UDP calling_VIA:5060;branch=z9hG4bK04B3fb4750baf5bf89b > To: <sip:+called_num@req_uri_host;user=phone>;tag=bb4ffe310s > From: "calling_name" > <sip:+calling_num@calling_VIA;user=phone>;tag=gK046df8ed Call-ID: > 52701823_134068140@calling_VIA > CSeq: 533420 INVITE > Contact: <sip:called_num@req_uri_host:5060> > P-Asserted-Identity: <sip:called_num@P_IP_2;user=phone> > Remote-Party-ID: <sip:called_num@P_IP_2;user=phone> > Content-Type: application/sdp > Content-Length: 150 > > v=0 > o=username_2 188 1 IN IP4 req_uri_host > s=session_2 > c=IN IP4 called_media_IP_2 > t=0 0 > m=audio 17724 RTP/AVP 0 > a=rtpmap:0 PCMU/8000 > > > SIP/2.0 183 Session Progress > Via: SIP/2.0/UDP calling_VIA:5060;branch=z9hG4bK04B3fb4750baf5bf89b > From: "calling_name" > <sip:+calling_num@calling_VIA;user=phone>;tag=gK046df8ed To: > <sip:+called_num@req_uri_host;user=phone>;tag=bae4a15d7s > Call-ID: 52701823_134068140@calling_VIA > CSeq: 533420 INVITE > Require: 100rel > RSeq: 8617 > Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, > NOTIFY, INFO, REGISTER Allow-Events: telephone-event > Remote-Party-ID: > <sip:called_num@called_media_IP_3>;party=called;screen=no;privacy=off > Contact: <sip:called_num@req_uri_host:5060> > Content-Disposition: session;handling=required > Content-Type: application/sdp > Content-Length: 182 > > v=0 > o=username_3 3814 9111 IN IP4 req_uri_host > s=session_3 > c=IN IP4 called_media_IP_3 > t=0 0 > m=audio 19346 RTP/AVP 0 > c=IN IP4 called_media_IP_3 > a=rtpmap:0 PCMU/8000 > > > CANCEL sip:+called_num@req_uri_host:5060;user=phone SIP/2.0 > Via: SIP/2.0/UDP calling_VIA:5060;branch=z9hG4bK04B3fb4750baf5bf89b > From: "calling_name" > <sip:+calling_num@calling_VIA;user=phone>;tag=gK046df8ed To: > <sip:+called_num@req_uri_host;user=phone> > Call-ID: 52701823_134068140@calling_VIA > CSeq: 533420 CANCEL > Max-Forwards: 70 > Reason: SIP;cause=503;text="Service Unavailable" > Supported: 100rel > Content-Length: 0 -- Alex Hermann _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
