Hi,

Im new to Kamailio so im sorry if some of my questions will sound a bit
wierd :=)

i have a setup like this: (Kamailio version 5.1)

UA > Kamailio > Freeswitch


Kamailio forwards registration to freeswitch without saving location.

I have configured sip over websockets and im able to register to
Freeswitcha via kamailio.
Also, i use add_path_received() so kamailio adds a path header to register
messages


recv 945 bytes from udp/[192.168.50.60]:5060 at 22:38:07.283809:
   ------------------------------------------------------------------------
   REGISTER sip:192.168.50.60 SIP/2.0
   Via: SIP/2.0/UDP
192.168.50.60;branch=z9hG4bKa929.0f66d60c4333f4a3a9d83d41a63295d9.0
   Via: SIP/2.0/WSS
192.0.2.110;rport=63296;received=192.168.200.77;branch=z9hG4bK6931435
   Max-Forwards: 69
   To: <sip:1001@192.168.50.60>
   From: <sip:1001@192.168.50.60>;tag=vq30modpgd
   Call-ID: dlnrna9o4ngn25fb9d1vi2
   CSeq: 196 REGISTER
   Authorization: Digest algorithm=MD5, username="1001",
realm="192.168.50.60", nonce="744aaa14-4a86-4ce3-b6d6-419b0a34ee90",
uri="sip:192.168.50.60", response="9b592b874474d4ffe5769f2410baceef",
qop=auth, cnonce="sf7ff0fp8tm5", nc=00000001
   Contact: <sip:1001@192.0.2.110
;transport=ws>;reg-id=1;+sip.instance="<urn:uuid:587f4694-7e55-46dc-a858-579a82556a20>";expires=600
   Allow: ACK,CANCEL,INVITE,MESSAGE,BYE,OPTIONS,INFO,NOTIFY,REFER
   Supported: path, gruu, 100rel, outbound
   User-Agent: SIP.js/0.7.0 BB
   Content-Length: 0
   Path: <sip:192.168.50.60;lr;received=192.168.200.77~63296~6>

   ------------------------------------------------------------------------
send 719 bytes to udp/[192.168.50.60]:5060 at 22:38:07.329444:
   ------------------------------------------------------------------------
   SIP/2.0 200 OK
   Via: SIP/2.0/UDP
192.168.50.60;branch=z9hG4bKa929.0f66d60c4333f4a3a9d83d41a63295d9.0
   Via: SIP/2.0/WSS
192.0.2.110;rport=63296;received=192.168.200.77;branch=z9hG4bK6931435
   From: <sip:1001@192.168.50.60>;tag=vq30modpgd
   To: <sip:1001@192.168.50.60>;tag=Spya88DKU9gSQ
   Call-ID: dlnrna9o4ngn25fb9d1vi2
   CSeq: 196 REGISTER
   Contact: <sip:1001@192.0.2.110;transport=ws>;expires=600
   Date: Fri, 09 Feb 2018 21:38:07 GMT
   User-Agent:
FreeSWITCH-mod_sofia/1.6.19+git~20171120T163416Z~b1b21d0695~64bit
   Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE,
REGISTER, REFER, NOTIFY
   Supported: timer, path, replaces
   Path: <sip:192.168.50.60>;lr;received=192.168.200.77~63296~6
   Content-Length: 0

   ------------------------------------------------------------------------




Once, registered, im trying to originate a call to the registered endpoint
from freeswitch


this results in an invite like this:

send 1757 bytes to udp/[192.168.50.60]:5060 at 22:46:21.252549:
   ------------------------------------------------------------------------
   INVITE sip:1001@192.0.2.110;transport=ws SIP/2.0
   Via: SIP/2.0/UDP 192.168.50.65:15060;rport;branch=z9hG4bKXHcX316pDgXZB
   Route: <sip:192.168.50.60>;lr;received=192.168.200.77~63296~6
   Max-Forwards: 70
   From: "" <sip:1002@192.168.50.65>;tag=tZQ393yprj7BK
   To: <sip:1001@192.0.2.110;transport=ws>
   Call-ID: 8212b700-8885-1236-08b3-000c293ae94e
   CSeq: 118770326 INVITE
   Contact: <sip:mod_sofia@192.168.50.65:15060>
   User-Agent:
FreeSWITCH-mod_sofia/1.6.19+git~20171120T163416Z~b1b21d0695~64bit
   Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE,
REGISTER, REFER, NOTIFY
   Supported: timer, path, replaces
   Allow-Events: talk, hold, conference, refer
   Content-Type: application/sdp
   Content-Disposition: session
   Content-Length: 891
   X-FS-Support: update_display,send_info
   Remote-Party-ID: <sip:1002@192.168.50.65
>;party=calling;screen=yes;privacy=off

Freeswitch appends a route header to the invite specifying kamailio as
route and a received with original uri.

well, here is the issue ... im failing to hit the SIP over websocket
client... Kamailio




my RELAY route is like this



route[RELAY] {

        # enable additional event routes for forwarded requests
        # - serial forking, RTP relaying handling, a.s.o.
        if (is_method("INVITE|BYE|SUBSCRIBE|UPDATE")) {
                if(!t_is_set("branch_route")) {
                        xlog("L_ALERT", "Its a Branch, go manage that !!!
<$ru>\n");
                        t_on_branch("MANAGE_BRANCH");
                }
        }
        if (is_method("INVITE|SUBSCRIBE|UPDATE")) {
                if(!t_is_set("onreply_route")) {
                        xlog("L_ALERT", "its onreply_route, go manage !!!
<$ru>\n");
                        t_on_reply("MANAGE_REPLY");

                }
        }
        if (is_method("INVITE")) {
                if(!t_is_set("failure_route")) {
                        xlog("L_ALERT", "Its failure_route, go manage !!!
<$ru>\n");
                        t_on_failure("MANAGE_FAILURE");
                }
        }

        $fs = "udp:192.168.50.60:5060";
        xlog("L_ALERT", "Trying to rely !!!  <$ru>\n");
        if (!t_relay()) {
                xlog("L_ALERT", "failed to rely !!!  <$ru>\n");
                sl_reply_error();
        }
        exit;
}

here is a part of the log:

Feb  9 22:48:48 incfskamtest01 /usr/sbin/kamailio[14896]: WARNING: <core>
[core/forward.c:231]: get_send_socket2(): protocol/port mismatch (forced
udp:192.168.50.60:5060, to ws:192.0.2.110:5060)
Feb  9 22:48:48 incfskamtest01 /usr/sbin/kamailio[14896]: DEBUG: <core>
[core/msg_translator.c:424]: clen_builder(): content-length: 916 (916)
Feb  9 22:48:48 incfskamtest01 /usr/sbin/kamailio[14896]: WARNING: <core>
[core/msg_translator.c:2765]: via_builder(): TCP/TLS connection (id: 0) for
WebSocket could not be found
Feb  9 22:48:48 incfskamtest01 /usr/sbin/kamailio[14896]: ERROR: <core>
[core/msg_translator.c:1980]: build_req_buf_from_sip_req(): could not
create Via header
Feb  9 22:48:48 incfskamtest01 /usr/sbin/kamailio[14896]: ERROR: tm
[t_fwd.c:476]: prepare_new_uac(): could not build request
Feb  9 22:48:48 incfskamtest01 /usr/sbin/kamailio[14896]: ERROR: tm
[t_fwd.c:1735]: t_forward_nonack(): failure to add branches
Feb  9 22:48:48 incfskamtest01 /usr/sbin/kamailio[14896]: DEBUG: tm
[t_funcs.c:334]: t_relay_to(): t_forward_nonack returned error -2 (-2)
Feb  9 22:48:48 incfskamtest01 /usr/sbin/kamailio[14896]: DEBUG: tm
[t_funcs.c:352]: t_relay_to(): -2 error reply generation delayed
Feb  9 22:48:48 incfskamtest01 /usr/sbin/kamailio[14896]: ERROR: ***
cfgtrace:request_route=[RELAY] c=[/etc/kamailio/kamailio.cfg] l=744 a=26
n=xlog
Feb  9 22:48:48 incfskamtest01 /usr/sbin/kamailio[14896]: ALERT: <script>:
failed to rely !!!  <sip:1001@192.0.2.110;transport=ws>


is that because i set a $fu before t_relay() ?


any idea how to approach the issue ?
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