Hello. I have following problem:
For example, UAC decides to send INVITE via TCP transport and does it like so: INVITE sip:[EMAIL PROTECTED] SIP/2.0 Call-ID: e271e3d45ca69c0a CSeq: 1 INVITE From: "user" <sip:[EMAIL PROTECTED]>;tag=1e5f7ab5 To: <sip:[EMAIL PROTECTED]> Via: SIP/2.0/TCP 192.168.1.4:5060;branch=z9hG4bKce32ffc97438620028ba85a78311d3cb Max-Forwards: 70 Contact: <sip:[EMAIL PROTECTED]:5060> Content-Type: application/sdp Content-Length: 227 Then OK is receivied and it looks like so SIP/2.0 200 OK Via: SIP/2.0/TCP 192.168.1.4:5060;branch=z9hG4bKce32ffc97438620028ba85a78311d3cb;received=192.168.1.4 Record-Route: <sip:88447-212.53.40.72.dialog.cgatepro;lr>,<sip:212.53.40.72:5060;lr>,<sip:212.53.40.40:5060;lr> From: "user" <sip:[EMAIL PROTECTED]>;tag=1e5f7ab5 To: <sip:[EMAIL PROTECTED]>;tag=000000000518036-57737A9D_lnqxjfk-660DE7A8 Call-ID: e271e3d45ca69c0a CSeq: 1 INVITE Contact: <sip:[EMAIL PROTECTED]> Supported: 100rel,timer,replaces,histinfo User-Agent: CommuniGatePro-callLeg/5.2.6 Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,INFO,MESSAGE,SUBSCRIBE,NOTIFY,PRACK,REFER Content-Type: application/sdp Content-Length: 193 Then ACK is sent to URI that is defined in Contact header: ACK sip:[EMAIL PROTECTED];transport=tcp SIP/2.0 Via: SIP/2.0/TCP 192.168.1.4:5060;branch=z9hG4bKca9dbdeb9f803d0cdba2c2124abd9440 CSeq: 1 ACK From: "user" <sip:[EMAIL PROTECTED]>;tag=1e5f7ab5 To: <sip:[EMAIL PROTECTED]>;tag=000000000518036-57737A9D_lnqxjfk-660DE7A8 Call-ID: e271e3d45ca69c0a Supported: 100rel,timer,replaces,histinfo User-Agent: CommuniGatePro-callLeg/5.2.6 Allow: INVITE,ACK,BYE,CANCEL,OPTIONS,INFO,MESSAGE,SUBSCRIBE,NOTIFY,PRACK,REFER Max-Forwards: 70 Route: <sip:212.53.40.40:5060;lr>,<sip:212.53.40.72:5060;lr>,<sip:88447-212.53.40.72.dialog.cgatepro;lr> Contact: <sip:[EMAIL PROTECTED]:5060> Content-Length: 0 Should this ACK be sent via TCP or UDP, whether URI in Route header does not explicitly defines transport? -- Best regards, Andrey mailto:[EMAIL PROTECTED] _______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is for NEW development of the core SIP Protocol Use [EMAIL PROTECTED] for questions on current sip Use [EMAIL PROTECTED] for new developments on the application of sip
