Hi,

regarding the missing Contact header in the REFER message, it can be solved by including some lines in /modules_k/dialog/dlg_ transfer.c. In this file, the Contact of the initial INVITE generated with dlg_bridge command can be easily changed as well.

The problem now is only in the processing of the ACK generated by the TM module. When this ACK leaves the Kamailio server the branch value of the topmost Via header is '0'.

Below you can find the debug output where the ACK is generated and routed by Kamailio. Any idea about where the error can be?

thanks in advance,
regards

Anton


11(5056) DEBUG: tm [t_msgbuilder.c:791]: building ACK for out-of-dialog INVITE (using RS in RR set).
11(5056) DEBUG: tm [t_msgbuilder.c:967]: ACK RURI: `sip:235@10.1.3.15:5061', NH: `sip:10.1.2.122;lr=on'.
11(5056) DEBUG: tm [t_reply.c:1059]: ->>>>>>>>> T_code=180, new_code=200
11(5056) DEBUG: tm [t_reply.c:1794]: DEBUG: local_reply: branch=0, save=0, winner=0
11(5056) DEBUG: tm [t_reply.c:356]: DEBUG: update_totag_set: new totag
11(5056) DEBUG: tm [t_reply.c:1831]: DEBUG: local transaction completed
11(5056) DEBUG: tm [t_hooks.c:288]: DBG: trans=0x7f9767eb1268, callback type 256, id 0 entered
11(5056) DEBUG: dialog [dlg_transfer.c:207]: completed with status 200
11(5056) DEBUG: <core> [parser/parse_to.c:179]: DEBUG: add_param: tag=533cb9e91f4b999cf76861cbb9ed54ed-3bcd
 9(5052) DEBUG: <core> [parser/msg_parser.c:612]: SIP Request:
 9(5052) DEBUG: <core> [parser/msg_parser.c:614]:  method:  <ACK>
 9(5052) DEBUG: <core> [parser/msg_parser.c:616]:  uri:     <sip:235@10.1.3.15:5061>
 9(5052) DEBUG: <core> [parser/msg_parser.c:618]:  version: <SIP/2.0>
 9(5052) DEBUG: <core> [parser/parse_via.c:1283]: Found param type 232, <branch> = <z9hG4bKf7bc.00856364.0>; state=16
 9(5052) DEBUG: <core> [parser/parse_via.c:2296]: end of header reached, state=5
 9(5052) DEBUG: <core> [parser/msg_parser.c:500]: parse_headers: Via found, flags=2
 9(5052) DEBUG: <core> [parser/msg_parser.c:502]: parse_headers: this is the first via
 9(5052) DEBUG: <core> [receive.c:137]: After parse_msg...
 9(5052) DEBUG: <core> [receive.c:177]: preparing to run routing scripts...
 9(5052) DEBUG: sl [sl_funcs.c:335]: to late to be a local ACK!
 9(5052) DEBUG: <core> [parser/parse_to.c:179]: DEBUG: add_param: tag=94cf927f9c6eed24i1
 9(5052) DEBUG: <core> [parser/parse_to.c:808]: end of header reached, state=29
 9(5052) DEBUG: <core> [parser/msg_parser.c:174]: DEBUG: get_hdr_field: <To> [43]; uri=[sip:235@10.1.2.122]
 9(5052) DEBUG: <core> [parser/msg_parser.c:176]: DEBUG: to body [sip:235@10.1.2.122]
 9(5052) DEBUG: <core> [parser/msg_parser.c:154]: get_hdr_field: cseq <CSeq>: <10> <ACK>
 9(5052) DEBUG: <core> [parser/msg_parser.c:188]: DEBUG: get_hdr_body : content_length=0
 9(5052) DEBUG: <core> [parser/msg_parser.c:90]: found end of header
 9(5052) DEBUG: maxfwd [mf_funcs.c:66]: max_forwards header not found!
 9(5052) DEBUG: <core> [parser/parse_to.c:179]: DEBUG: add_param: tag=533cb9e91f4b999cf76861cbb9ed54ed-3bcd
 9(5052) DEBUG: <core> [parser/parse_to.c:808]: end of header reached, state=29
 9(5052) DEBUG: sanity [mod_sanity.c:220]: all sanity checks passed
 9(5052) ERROR: <script>: kamailio!!!: ACK 9(5052) DEBUG: siputils [checks.c:68]: totag found
 9(5052) DEBUG: rr [loose.c:85]: is_preloaded: No
 9(5052) DEBUG: <core> [socket_info.c:485]: grep_sock_info - checking if host==us: 9==9 &&  [10.1.3.15] == [127.0.0.1]
 9(5052) DEBUG: <core> [socket_info.c:488]: grep_sock_info - checking if port 5060 matches port 5061
 9(5052) DEBUG: <core> [socket_info.c:485]: grep_sock_info - checking if host==us: 9==9 &&  [10.1.3.15] == [127.0.0.2]
 9(5052) DEBUG: <core> [socket_info.c:488]: grep_sock_info - checking if port 5060 matches port 5061
 9(5052) DEBUG: <core> [socket_info.c:485]: grep_sock_info - checking if host==us: 9==10 &&  [10.1.3.15] == [10.1.2.122]
 9(5052) DEBUG: <core> [socket_info.c:488]: grep_sock_info - checking if port 5060 matches port 5061
 9(5052) DEBUG: <core> [socket_info.c:485]: grep_sock_info - checking if host==us: 9==9 &&  [10.1.3.15] == [127.0.0.1]
 9(5052) DEBUG: <core> [socket_info.c:488]: grep_sock_info - checking if port 5060 matches port 5061
 9(5052) DEBUG: <core> [socket_info.c:485]: grep_sock_info - checking if host==us: 9==9 &&  [10.1.3.15] == [127.0.0.2]
 9(5052) DEBUG: <core> [socket_info.c:488]: grep_sock_info - checking if port 5060 matches port 5061
 9(5052) DEBUG: <core> [socket_info.c:485]: grep_sock_info - checking if host==us: 9==10 &&  [10.1.3.15] == [10.1.2.122]
 9(5052) DEBUG: <core> [socket_info.c:488]: grep_sock_info - checking if port 5060 matches port 5061
 9(5052) DEBUG: <core> [forward.c:356]: check_self: host != me
 9(5052) DEBUG: <core> [socket_info.c:485]: grep_sock_info - checking if host==us: 10==9 &&  [10.1.2.122] == [127.0.0.1]
 9(5052) DEBUG: <core> [socket_info.c:488]: grep_sock_info - checking if port 5060 matches port 5060
 9(5052) DEBUG: <core> [socket_info.c:485]: grep_sock_info - checking if host==us: 10==9 &&  [10.1.2.122] == [127.0.0.2]
 9(5052) DEBUG: <core> [socket_info.c:488]: grep_sock_info - checking if port 5060 matches port 5060
 9(5052) DEBUG: <core> [socket_info.c:485]: grep_sock_info - checking if host==us: 10==10 &&  [10.1.2.122] == [10.1.2.122]
 9(5052) DEBUG: <core> [socket_info.c:488]: grep_sock_info - checking if port 5060 matches port 5060
 9(5052) DEBUG: rr [loose.c:781]: Topmost route URI: 'sip:10.1.2.122;lr=on' is me
 9(5052) DEBUG: <core> [parser/msg_parser.c:90]: found end of header
 9(5052) DEBUG: rr [loose.c:257]: No next Route HF found
 9(5052) DEBUG: rr [loose.c:800]: No next URI found
 9(5052) DEBUG: rr [rr_cb.c:97]: callback id 0 entered with <lr=on>
 9(5052) DEBUG: dialog [dlg_handlers.c:797]: Route param 'did' not found
 9(5052) DEBUG: tm [t_lookup.c:1387]: DEBUG: t_newtran: msg id=10 , global msg id=9 , T on entrance=0xffffffffffffffff
 9(5052) DEBUG: tm [t_lookup.c:528]: t_lookup_request: start searching: hash=52095, isACK=1
 9(5052) DEBUG: tm [t_lookup.c:720]: DEBUG: t_lookup_request: e2e proxy ACK found
 9(5052) DEBUG: tm [t_reply.c:276]: DEBUG: totag for e2e ACK found: 0
 9(5052) DEBUG: tm [t_funcs.c:315]: SER: forwarding ACK  statelessly
 9(5052) DEBUG: <core> [msg_translator.c:200]: check_via_address(10.1.2.122, 10.1.2.122, 0)
 9(5052) DEBUG: <core> [forward.c:509]: Sending:
ACK sip:235@10.1.3.15:5061 SIP/2.0
Max-Forwards: 10
Via: SIP/2.0/UDP 10.1.2.122;branch=0
Via: SIP/2.0/UDP 10.1.2.122;branch=z9hG4bKf7bc.00856364.0
From: sip:click2dial@172.22.5.17;tag=533cb9e91f4b999cf76861cbb9ed54ed-3bcd
Call-ID: 2bef8d5474ff8cd4
To: sip:235@10.1.2.122;tag=94cf927f9c6eed24i1
CSeq: 10 ACK
User-Agent: kamailio (3.0.1 (x86_64/linux))
Content-Length: 0

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