Hello,

I've issue with bridging media between IPv4 and IPv6 clients. IPv4-IPv4 and IPv6-IPv6 calls are working without issues. I'm using kamailio 4.4.2 and configuration according to: http://kb.asipto.com/kamailio:kamailio-mixed-ipv4-ipv6

SIP signalling is working without issues,but media addresses in SDP are not rewritten correctly.

The server is on amazon AWS and both kamailio and RTPengine are on the same server. RTPengine is running using these options:

/usr/sbin/rtpengine --interface=privateIPv4!publicIPv4 --interface=GlobalIPv6 --listen-udp=127.0.0.1:22222 --tos=184 --pidfile=/var/run/rtpengine.pid --log-level=6 --log-facility=daemon

In case of IPv4-IPv6 call, INVITE message contains correct IPv4 address but 200 OK response to the caller still contains IPv6 address of the callee in SDP body instead of IPv4 address of the server/RTPengine. This is the log during generation of the 200 OK response. Seems that RTPengine failed to parse IPv4 address from SDP body.

Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/msg_parser.c:618]: parse_msg(): SIP Reply (status): Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/msg_parser.c:620]: parse_msg(): version: <SIP/2.0> Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/msg_parser.c:622]: parse_msg(): status: <200> Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/msg_parser.c:624]: parse_msg(): reason: <OK> Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/parse_via.c:1254]: parse_via_param(): Found param type 232, <branch> = <z9hG4bK5afe.c59aef39af345458e17940722ba0c70b.0>; state=6 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/parse_via.c:1254]: parse_via_param(): Found param type 234, <received> = <Server's GlobalIPv6>; state=6 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/parse_via.c:1254]: parse_via_param(): Found param type 236, <i> = <8>; state=16 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/parse_via.c:2642]: parse_via(): end of header reached, state=5 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/msg_parser.c:496]: parse_headers(): parse_headers: Via found, flags=2 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/msg_parser.c:498]: parse_headers(): parse_headers: this is the first via Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [receive.c:178]: receive_msg(): After parse_msg... Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: tm [t_lookup.c:1011]: t_check_msg(): DEBUG: t_check_msg: msg id=143 global id=142 T start=0xffffffffffffffff Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/parse_via.c:1254]: parse_via_param(): Found param type 234, <received> = <178.165.130.177>; state=6 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/parse_via.c:1254]: parse_via_param(): Found param type 232, <branch> = <z9hG4bK.BUIgttWpK>; state=6 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/parse_via.c:1254]: parse_via_param(): Found param type 235, <rport> = <2066>; state=16 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/parse_via.c:2642]: parse_via(): end of header reached, state=5 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/msg_parser.c:496]: parse_headers(): parse_headers: Via found, flags=62 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/msg_parser.c:509]: parse_headers(): parse_headers: this is the second via Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/parse_addr_spec.c:172]: parse_to_param(): DEBUG: add_param: tag=2996330c Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/parse_addr_spec.c:894]: parse_addr_spec(): end of header reached, state=29 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/msg_parser.c:173]: get_hdr_field(): DEBUG: get_hdr_field: <To> [59]; uri=[sip:user@domain.com] Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/msg_parser.c:175]: get_hdr_field(): DEBUG: to body ["user"< sip:user@domain.com>] Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/msg_parser.c:153]: get_hdr_field(): get_hdr_field: cseq <CSeq>: <21> <INVITE> Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: tm [t_lookup.c:888]: t_reply_matching(): DEBUG: t_reply_matching: hash 61349 label 0 branch 0 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: tm [t_lookup.c:943]: t_reply_matching(): DEBUG: t_reply_matching: reply matched (T=0x7f7f95c19a10)! Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: tm [t_hooks.c:266]: run_trans_callbacks_internal(): DBG: trans=0x7f7f95c19a10, callback type 2, id 0 entered Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: acc [acc_logic.c:644]: tmcb_func(): acc callback called for t(0x7f7f95c19a10) event type 2, reply code 200 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: tm [t_lookup.c:1080]: t_check_msg(): DEBUG: t_check_msg: msg id=143 global id=143 T end=0x7f7f95c19a10 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: tm [t_reply.c:2160]: reply_received(): DEBUG: reply_received: org. status uas=180, uac[0]=180 local=0 is_invite=1) Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <script>: incoming reply Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <script>: BMX: FAIE Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/msg_parser.c:187]: get_hdr_field(): DEBUG: get_hdr_body : content_length=559 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/msg_parser.c:89]: get_hdr_field(): found end of header Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/sdp/sdp_helpr_funcs.c:504]: extract_mediaip(): located IP address [IPv6 of the callee] in `o=' field Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/sdp/sdp_helpr_funcs.c:504]: extract_mediaip(): located IP address [IPv6 of the callee] in `c=' field Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/sdp/sdp.c:574]: parse_sdp_session(): ignoring unknown type in a= line: `a=rtcp-fb:* nack#015#012a=rtcp-fb:* nack pli#015#012' Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/sdp/sdp.c:574]: parse_sdp_session(): ignoring unknown type in a= line: `a=rtcp-fb:* nack pli#015#012' Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: rtpproxy [rtpproxy_funcs.c:148]: check_content_type(): type <application/sdp> found valid Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/parse_addr_spec.c:172]: parse_to_param(): DEBUG: add_param: tag=aNfQNJz3e Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/parse_addr_spec.c:894]: parse_addr_spec(): end of header reached, state=29 Jul 19 08:02:42 rtpengine[24330]: Got valid command from udp: 127.0.0.1:28152: 1691_12 LAEI6 dcMDMrNRhw IPv6 of the callee 58100 aNfQNJz3e;1 2996330c;1 Jul 19 08:02:42 rtpengine[24330]: [dcMDMrNRhw] Failed to parse a media stream: /IPv6 of the callee:58100 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: rtpproxy [rtpproxy.c:2712]: force_rtp_proxy(): proxy reply: E8 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: ERROR: rtpproxy [rtpproxy.c:2735]: force_rtp_proxy(): incorrect port 0 in reply from rtp proxy Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: tm [t_reply.c:1233]: t_should_relay_response(): ->>>>>>>>> T_code=180, new_code=200 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: tm [t_reply.c:1751]: relay_reply(): DEBUG: relay_reply: branch=0, save=0, relay=0 icode=0 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [msg_translator.c:2260]: generate_res_buf_from_sip_res(): old size: 1467, new size: 1319 Jul 19 08:02:42 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [msg_translator.c:2278]: generate_res_buf_from_sip_res(): copied size: orig:164, new: 16, rest: 1303 msg=#012SIP/2.0 200 OK#015#012 Via: SIP/2.0/TCP 10.152.108.46:56401;received=X.X.X.X; branch=z9hG4bK.BUIgttWpK;rport=2066 Record-Route: <sip:[Server's IPv6];transport=tcp;r2=on;lr;nat=v46> Record-Route: sip:X.X.X.X;transport=tcp;r2=on;lr;nat=v46 Contact: <sip:user@[IPv6 of the callee]:59335;rinstance= 836aa36a01097072;transport=tcp> To: "user"sip:user@domain.com;tag=2996330c From: "caller" sip:caller@domain.com;tag=aNfQNJz3e Call-ID: dcMDMrNRhw CSeq: 21 INVITE Allow: SUBSCRIBE, NOTIFY, INVITE, ACK, CANCEL, BYE, REFER, INFO, OPTIONS, MESSAGE Content-Type: application/sdp Supported: replaces User-Agent: Bria 5 release 5.0.0 stamp 85993 Content-Length: 559

v=0 o=- 241380314 3 IN IP6 IPv6 of the callee(should be IPv4 address of the server) s=Bria 5 release 5.0.0 stamp 85993 c=IN IP6 IPv6 of the callee (should be IPv4 address of the server)

The same situation is in case of IPv6-IPv4 call. This is the part of the log in case of IPV6-IPv4 call when kamailio is creating INVITE to the IPv4 callee:

Jul 19 08:04:52 /usr/local/sbin/kamailio[1691]: DEBUG: <script>: BMX: FAIE Jul 19 08:04:52 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/sdp/sdp_helpr_funcs.c:504]: extract_mediaip(): located IP address [IPv6 Address] in `o=' field Jul 19 08:04:52 /usr/local/sbin/kamailio[1691]: DEBUG: <core> [parser/sdp/sdp_helpr_funcs.c:504]: extract_mediaip(): located IP address [IPv6 Address] in `c=' field Jul 19 08:04:52 /usr/local/sbin/kamailio[1691]: DEBUG: rtpproxy [rtpproxy_funcs.c:148]: check_content_type(): type <application/sdp> found valid Jul 19 08:04:52 rtpengine[24330]: Got valid command from udp: 127.0.0.1:28152: 1691_13 UAEI6 85993YWVkNmQ4YTFmN2JkZWQ4NjIzMGYwMDBlM2RlOGY0ZDQ 2a03:f81:abcd:172:16:20:119:2 50168 1430094e;1 Jul 19 08:04:52 rtpengine[24330]: [85993YWVkNmQ4YTFmN2JkZWQ4NjIzMGYwMDBlM2RlOGY0ZDQ] Creating new call Jul 19 08:04:52 rtpengine[24330]: [85993YWVkNmQ4YTFmN2JkZWQ4NjIzMGYwMDBlM2RlOGY0ZDQ] Failed to parse a media stream: /IPv6:50168 Jul 19 08:04:52 /usr/local/sbin/kamailio[1691]: DEBUG: rtpproxy [rtpproxy.c:2712]: force_rtp_proxy(): proxy reply: E8 Jul 19 08:04:52 /usr/local/sbin/kamailio[1691]: ERROR: rtpproxy [rtpproxy.c:2735]: force_rtp_proxy(): incorrect port 0 in reply from rtp proxy Jul 19 08:04:52 /usr/local/sbin/kamailio[1691]: DEBUG: siputils [checks.c:97]: has_totag(): no totag

Any help would be very appreciated!

Thank you Kind regards