While running opensips in debug mode I noticed that for initial requests of dialog creating methods the debug logs were showing a To tag where none actually exists. The tag displayed was actually the From tag.
INVITE sip:[email protected] SIP/2.0 Via: SIP/2.0/UDP 192.168.1.3:5060;branch=z9hG4bK.k7nLoQHpR;rport From: <sip:[email protected]>;*tag=GSq6JzXiH * To: sip:[email protected] CSeq: 21 INVITE Call-ID: VCALnmUf8V Nov 23 11:02:32 [1131200] DBG:maxfwd:is_maxfwd_present: value = 70 Nov 23 11:02:32 [1131200] *DBG:sipmsgops:has_totag: no totag * Nov 23 11:02:32 [1131200] Initial request, method is INVITE, URI is sip:[email protected] Nov 23 11:02:32 [1131200] DBG:core:check_self: host != me Nov 23 11:02:32 [1131200] DBG:core:parse_headers: flags=78 Nov 23 11:02:32 [1131200] DBG:tm:t_lookup_request: start searching: hash=42361, isACK=0 Nov 23 11:02:32 [1131200] DBG:tm:matching_3261: RFC3261 transaction matching failed Nov 23 11:02:32 [1131200] DBG:tm:t_lookup_request: no transaction found Nov 23 11:02:32 [1131200] *DBG:core:parse_to_param: tag=GSq6JzXiH * Nov 23 11:02:32 [1131200] DBG:core:parse_to_param: end of header reached, state=11 PUBLISH sip:[email protected] SIP/2.0 Via: SIP/2.0/UDP 192.168.1.3:5060;branch=z9hG4bK.myBdBZt3P;rport From: <sip:[email protected]>;*tag=cbp~iz4fq* To: sip:[email protected] CSeq: 21 PUBLISH Call-ID: cRC6Gw590w Max-Forwards: 70 Nov 23 11:07:08 [1133909] DBG:maxfwd:is_maxfwd_present: value = 70 Nov 23 11:07:08 [1133909] *DBG:sipmsgops:has_totag: no totag* Nov 23 11:07:08 [1133909] Initial request, method is PUBLISH, URI is sip:[email protected] Nov 23 11:07:08 [1133909] DBG:core:check_self: host != me Nov 23 11:07:08 [1133909] DBG:core:parse_headers: flags=78 Nov 23 11:07:08 [1133909] DBG:tm:t_lookup_request: start searching: hash=7222, isACK=0 Nov 23 11:07:08 [1133909] DBG:tm:matching_3261: RFC3261 transaction matching failed Nov 23 11:07:08 [1133909] DBG:tm:t_lookup_request: no transaction found Nov 23 11:07:08 [1133909] *DBG:core:parse_to_param: tag=cbp~iz4fq* Nov 23 11:07:08 [1133909] DBG:core:parse_to_param: end of header reached, state=11 SUBSCRIBE sip:[email protected] SIP/2.0 Via: SIP/2.0/UDP 192.168.1.3:5060;branch=z9hG4bK.OkkDHBafu;rport From: <sip:[email protected]>;*tag=g2aNdkn4o * To: sips:[email protected] CSeq: 21 SUBSCRIBE Call-ID: L9LKmnZVY7 Max-Forwards: 69 Nov 23 11:07:07 [1133909] DBG:maxfwd:is_maxfwd_present: value = 70 Nov 23 11:07:07 [1133909] *DBG:sipmsgops:has_totag: no totag* Nov 23 11:07:07 [1133909] Initial request, method is SUBSCRIBE, URI is sip:[email protected] Nov 23 11:07:07 [1133909] DBG:core:check_self: host != me Nov 23 11:07:07 [1133909] DBG:core:parse_headers: flags=78 Nov 23 11:07:07 [1133909] DBG:tm:t_lookup_request: start searching: hash=33557, isACK=0 Nov 23 11:07:07 [1133909] DBG:tm:matching_3261: RFC3261 transaction matching failed Nov 23 11:07:07 [1133909] DBG:tm:t_lookup_request: no transaction found Nov 23 11:07:07 [1133909] *DBG:core:parse_to_param: tag=g2aNdkn4o * Nov 23 11:07:07 [1133909] DBG:core:parse_to_param: end of header reached, state=1
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