The best way would be to fix the user agent. SER would not know where to forward the reply if it does not contain Via.
Jan.
On 02-06-2005 10:58, Dominik Schulte wrote:
Hi,
I am struggling with a problem where I have a UA that responds to invites but does not preserve the original request Via fields. see ngrep capture below. I can see that SER receives the reply, but drops it because it cannot correlate any transaction with this response. I tried to write a module that uses the tm modules callbacks, but it seems that response messages are dropped by the core.
Is there any way I can validate responses that fall outside any transaction??
# U 172.17.26.19:5060 -> 172.17.26.178:5060 INVITE sip:dschulte@heat.callsuite.tellumat.co.za SIP/2.0. Via: SIP/2.0/UDP 172.17.26.19:5060;rport;branch=z9hG4bKE2FD4189B717447BB8192445A851777B. From: DOMINIKS PC SIP PHONE sip:1200@heat.callsuite.tellumat.co.za;tag=859273871. To: sip:dschulte@heat.callsuite.tellumat.co.za. Contact: sip:1200@172.17.26.19:5060. Call-ID: AF0EF5B2-5850-4573-A2FF-F1D50A6B2B65@172.17.26.19. CSeq: 656 INVITE. Max-Forwards: 70. Content-Type: application/sdp. User-Agent: X-Lite release 1103m. Content-Length: 293.
# U 172.17.26.178:5060 -> 172.17.26.19:5060 SIP/2.0 100 trying -- your call is important to us. Via: SIP/2.0/UDP 172.17.26.19:5060;rport=5060;branch=z9hG4bKE2FD4189B717447BB8192445A851777B. From: DOMINIKS PC SIP PHONE sip:1200@heat.callsuite.tellumat.co.za;tag=859273871. To: sip:dschulte@heat.callsuite.tellumat.co.za. Call-ID: AF0EF5B2-5850-4573-A2FF-F1D50A6B2B65@172.17.26.19. CSeq: 656 INVITE. Server: Sip EXpress router (0.8.14 (i386/linux)). Content-Length: 0. Warning: 392 172.17.26.178:5060 "Noisy feedback tells: pid=17762 req_src_ip=172.17.26.19 req_src_port=5060 in_uri=sip:dschulte@heat.callsuite.tellumat.co.za out_uri=sip:94099:1001@172.17.1.31 via_cnt==1". .
# U 172.17.26.178:5060 -> 172.17.1.31:5060 INVITE sip:94099:1001@172.17.1.31 SIP/2.0. Record-Route: sip:dschulte@172.17.26.178;ftag=859273871;lr=on. Via: SIP/2.0/UDP 172.17.26.178;branch=z9hG4bK33ab.6f0be065.0. Via: SIP/2.0/UDP 172.17.26.19:5060;rport=5060;branch=z9hG4bKE2FD4189B717447BB8192445A851777B. From: DOMINIKS PC SIP PHONE sip:1200@heat.callsuite.tellumat.co.za;tag=859273871. To: sip:94099@172.17.1.31>. Contact: sip:1200@172.17.26.19:5060. Call-ID: AF0EF5B2-5850-4573-A2FF-F1D50A6B2B65@172.17.26.19. CSeq: 656 INVITE. Max-Forwards: 69. Content-Type: application/sdp. User-Agent: X-Lite release 1103m. Content-Length: 293.
# U 172.17.1.31:5060 -> 172.17.26.178:5060 SIP/2.0 100 Trying. Via: SIP/2.0/UDP 172.17.26.178. `From: DOMINIKS PC SIP PHONE sip:1200@heat.callsuite.tellumat.co.za;tag=859273871. To: sip:94099@172.17.1.31;tag=viper94099. Call-ID: AF0EF5B2-5850-4573-A2FF-F1D50A6B2B65@172.17.26.19. CSeq: 656 INVITE. Content-Length: 0. .
# U 172.17.1.31:5060 -> 172.17.26.178:5060 SIP/2.0 180 Ringing. Via: SIP/2.0/UDP 172.17.26.178. From: DOMINIKS PC SIP PHONE sip:1200@heat.callsuite.tellumat.co.za;tag=859273871. To: "" sip:94099@172.17.1.31;tag=viper94099. Call-ID: AF0EF5B2-5850-4573-A2FF-F1D50A6B2B65@172.17.26.19. CSeq: 656 INVITE. Content-Length: 0. .
# U 172.17.26.178:5060 -> 172.17.1.31:5060 INVITE sip:94099:1001@172.17.1.31 SIP/2.0. Record-Route: sip:dschulte@172.17.26.178;ftag=859273871;lr=on. Via: SIP/2.0/UDP 172.17.26.178;branch=z9hG4bK33ab.6f0be065.0. Via: SIP/2.0/UDP 172.17.26.19:5060;rport=5060;branch=z9hG4bKE2FD4189B717447BB8192445A851777B. From: DOMINIKS PC SIP PHONE sip:1200@heat.callsuite.tellumat.co.za;tag=859273871. To: sip:94099@172.17.1.31>. Contact: sip:1200@172.17.26.19:5060. Call-ID: AF0EF5B2-5850-4573-A2FF-F1D50A6B2B65@172.17.26.19. CSeq: 656 INVITE. Max-Forwards: 69. Content-Type: application/sdp. User-Agent: X-Lite release 1103m. Content-Length: 293.
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Jan Janak