Hello I use this version of kamailio

 kamailio -v
version: kamailio 4.3.0-dev3 (x86_64/linux) 8cdbe7
flags: STATS: Off, USE_TCP, USE_TLS, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, F_MALLOC, DBG_F_MALLOC, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: 8cdbe7
compiled on 17:54:50 Jan 20 2015 with gcc 4.8.2

I hav an issue with append branches to branch route when I need fork call to one endpoint woth different destionations.

I use my own algorithm for call to this devices because with lookup("location") I can not use RTPENGINE for different types of endpoints (web endoints and standart UDP endpoints)

My alg is here:

{

            sql_query("ca", "select contact from location where username='$tU'", "ra");
            xlog("L_INFO","rows: $dbr(ra=>rows) cols: $dbr(ra=>cols)\n");
            if($dbr(ra=>rows)>0){
                $var(i)=0;
                 while($var(i)<$dbr(ra=>rows)){

                    xlog("L_INFO","SQL query return contact {$dbr(ra=>[$var(i),0])} for {$tU} at step {$var(i)}\n");

                    if ($dbr(ra=>[$var(i),0])=~"transport=ws"){ 
                        xlog("L_INFO", "This is a Websocket call to endpoint");
                        sql_pvquery("ca", "select received from location where contact='$dbr(ra=>[$var(i),0])'","$var(recieved)");

                        $du=$var(recieved);
                        xlog("L_INFO","SQL query return recieved {$var(recieved)} for {$tU}. Destination is {$du}\n");


                            append_branch("sip:$tU@$(du{s.select,1,:})");


                    }

                    else
                    {   

                        xlog("L_INFO", "This is a classic UDP call to endpoint");
                        $var(recieved)='';
                        sql_pvquery("ca", "select received from location where contact='$dbr(ra=>[$var(i),0])'","$var(recieved)");
                        xlog("L_INFO", "SQL query return RECIEVED {$var(recieved)}");
                        if ($var(recieved)==0){
                            xlog("L_INFO", "Recieved string is EMPTY");
                            $du="sip:"+$(dbr(ra=>[$var(i),0]){s.select,1,@});
                        }
                        else {
                            xlog("L_INFO", "Recieved string is {$var(recieved)}");
                            $du=$var(recieved);
                        }
                        $var(UDP_contact)="sip:"+$(dbr(ra=>[$var(i),0]){s.select,1,@});                     

                                append_branch("sip:$tU@$(du{s.select,1,:})");

                        xlog("L_INFO","Classic Destination URI is {$dbr(ra=>[$var(i),0])} for {$tU}}. Destination is {$du}\n");
                    }
                    $var(i) = $var(i) + 1;

                }   
            }
            else{
            exit;
            }
            t_on_branch("1");
            return;

        }
    }

}


branch_route[1]{

    if($du=~"transport=ws"){
            xlog("L_INFO","Websocket Branch is {$du} for {$tU}\n");

            rtpengine_manage("internal extenal force trust-address replace-origin replace-session-connection ICE=force RTP/SAVPF");
            t_on_reply("REPLY_FROM_WS");

            }
    else{
            xlog("L_INFO","UDP Branch is {$du)} for {$tU}\n");

            rtpengine_manage("replace-origin replace-session-connection ICE=remove RTP/AVP");
            t_on_reply("MANAGE_CLASSIC_REPLY");
    }
}

So as you see I choose array of devices and then set its to branches.

At the kamailio console I see output

This is output of alg that above.

I have 3 devices: 2 websocket devices and 1 udp
But when you look at dump where rtpengine make changes with packets you can see that it runs for 4 devices and 1 and 4 devices is the same.
You can see start of every branch from words of log "Websocket Branch is" or "UDP Branch is"

So this bug gives a mistake because some of hardphones can not handlie double INVITE and kamilio response for this devices cancel with 200 cause because hardphone set 482 reply to kamialio.
(you can see it reply at the log)

Feb  8 23:04:43 Kamailio2 kamailio[59406]: INFO: <script>: rows: 3 cols: 1
Feb  8 23:04:43 Kamailio2 kamailio[59406]: INFO: <script>: SQL query return contact {sip:5ue13vsh@2t4iielj109h.invalid;transport=ws} for {123455678} at step {0}
Feb  8 23:04:43 Kamailio2 kamailio[59406]: INFO: <script>: This is a Websocket call to endpoint
Feb  8 23:04:43 Kamailio2 kamailio[59406]: INFO: <script>: SQL query return recieved {sip:85.6.14.8:4328;transport=WS} for {123455678}. Destination is {sip:85.6.14.8:4328;transport=WS}
Feb  8 23:04:43 Kamailio2 kamailio[59406]: INFO: <script>: SQL query return contact {sip:a7uo9vsq@7c0oo5kvc71e.invalid;transport=ws} for {123455678} at step {1}
Feb  8 23:04:43 Kamailio2 kamailio[59406]: INFO: <script>: This is a Websocket call to endpoint
Feb  8 23:04:43 Kamailio2 kamailio[59406]: INFO: <script>: SQL query return recieved {sip:85.2.10.3:58509;transport=WS} for {123455678}. Destination is {sip:85.2.10.3:58509;transport=WS}
Feb  8 23:04:43 Kamailio2 kamailio[59406]: INFO: <script>: SQL query return contact {sip:upsjchv2@5c88tisd29d4.invalid;transport=ws} for {123455678} at step {2}
Feb  8 23:04:43 Kamailio2 kamailio[59406]: INFO: <script>: This is a Websocket call to endpoint
Feb  8 23:04:43 Kamailio2 kamailio[59406]: INFO: <script>: SQL query return recieved {sip:18.9.18.10:56917;transport=WS} for {123455678}. Destination is {sip:18.9.18.10:56917;transport=WS}
Feb  8 23:04:43 Kamailio2 kamailio[59406]: INFO: <script>: Websocket Branch is {sip:18.9.18.10:56917;transport=WS} for {123455678}
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: Got valid command from 127.0.0.1:52689: offer - { "sdp": "v=0#015#012o=root 1141861088 1141861088 IN IP4 12.34.56.78#015#012s=Asterisk PBX 13.1.0#015#012c=IN IP4 12.34.56.78#015#012t=0 0#015#012m=audio 12230 RTP/AVP 9 8 107 0 101#015#012a=rtpmap:9 G722/8000#015#012a=rtpmap:8 PCMA/8000#015#012a=rtpmap:107 opus/48000/2#015#012a=rtpmap:0 PCMU/8000#015#012a=rtpmap:101 telephone-event/8000#015#012a=fmtp:101 0-16#015#012a=maxptime:60#015#012a=sendrecv#015#012", "ICE": "force", "direction": [ "internal" ], "flags": [ "extenal", "force", "trust-address" ], "replace": [ "origin",  ...
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: ... "session-connection" ], "transport-protocol": "RTP/SAVPF", "call-id": "220725c425526bc941dff8e972bd9458@12.34.56.78:50600", "received-from": [ "IP4", "12.34.56.78" ], "from-tag": "as4f0c032f", "command": "offer" }
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: Unknown flag encountered: 'extenal'
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: Unknown flag encountered: 'force'
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: [220725c425526bc941dff8e972bd9458@12.34.56.78:50600] Creating new call
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: [220725c425526bc941dff8e972bd9458@12.34.56.78:50600] Returning to SIP proxy: d3:sdp747:v=0#015#012o=root 1141861088 1141861088 IN IP4 23.101.139.216#015#012s=Asterisk PBX 13.1.0#015#012c=IN IP4 23.101.139.216#015#012t=0 0#015#012a=ice-lite#015#012m=audio 38518 RTP/SAVPF 9 8 107 0 101#015#012a=rtpmap:9 G722/8000#015#012a=rtpmap:8 PCMA/8000#015#012a=rtpmap:107 opus/48000/2#015#012a=rtpmap:0 PCMU/8000#015#012a=rtpmap:101 telephone-event/8000#015#012a=fmtp:101 0-16#015#012a=maxptime:60#015#012a=sendrecv#015#012a=rtcp:38519#015#012a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:f31jYQjjKBdYoqWYijx0V/ZtTfP17pTVW8NJGVQ4#015#012a=setup:actpass#015#012a=fingerprint:sh ...
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: [220725c425526bc941dff8e972bd9458@12.34.56.78:50600] ... a-1 00:E3:0F:B6:C0:9F:D4:16:52:D2:41:A8:01:24:51:CD:3F:FB:B2:55#015#012a=ice-ufrag:VfqUSGBP#015#012a=ice-pwd:t5bLzDaNcqWUwzh7iEtyAZfweGo6#015#012a=candidate:04GQy5683m4TP1Da 1 UDP 2130706431 23.101.139.216 38518 typ host#015#012a=candidate:04GQy5683m4TP1Da 2 UDP 2130706430 23.101.139.216 38519 typ host#015#0126:result2:oke
Feb  8 23:04:43 Kamailio2 kamailio[59406]: INFO: <script>: Websocket Branch is {sip:85.6.14.8:4328;transport=WS} for {123455678}
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: Got valid command from 127.0.0.1:52689: offer - { "sdp": "v=0#015#012o=root 1141861088 1141861088 IN IP4 12.34.56.78#015#012s=Asterisk PBX 13.1.0#015#012c=IN IP4 12.34.56.78#015#012t=0 0#015#012m=audio 12230 RTP/AVP 9 8 107 0 101#015#012a=rtpmap:9 G722/8000#015#012a=rtpmap:8 PCMA/8000#015#012a=rtpmap:107 opus/48000/2#015#012a=rtpmap:0 PCMU/8000#015#012a=rtpmap:101 telephone-event/8000#015#012a=fmtp:101 0-16#015#012a=maxptime:60#015#012a=sendrecv#015#012", "ICE": "force", "direction": [ "internal" ], "flags": [ "extenal", "force", "trust-address" ], "replace": [ "origin",  ...
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: ... "session-connection" ], "transport-protocol": "RTP/SAVPF", "call-id": "220725c425526bc941dff8e972bd9458@12.34.56.78:50600", "received-from": [ "IP4", "12.34.56.78" ], "from-tag": "as4f0c032f", "command": "offer" }
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: Unknown flag encountered: 'extenal'
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: Unknown flag encountered: 'force'
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: [220725c425526bc941dff8e972bd9458@12.34.56.78:50600] Returning to SIP proxy: d3:sdp747:v=0#015#012o=root 1141861088 1141861088 IN IP4 23.101.139.216#015#012s=Asterisk PBX 13.1.0#015#012c=IN IP4 23.101.139.216#015#012t=0 0#015#012a=ice-lite#015#012m=audio 38518 RTP/SAVPF 9 8 107 0 101#015#012a=rtpmap:9 G722/8000#015#012a=rtpmap:8 PCMA/8000#015#012a=rtpmap:107 opus/48000/2#015#012a=rtpmap:0 PCMU/8000#015#012a=rtpmap:101 telephone-event/8000#015#012a=fmtp:101 0-16#015#012a=maxptime:60#015#012a=sendrecv#015#012a=rtcp:38519#015#012a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:f31jYQjjKBdYoqWYijx0V/ZtTfP17pTVW8NJGVQ4#015#012a=setup:actpass#015#012a=fingerprint:sh ...
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: [220725c425526bc941dff8e972bd9458@12.34.56.78:50600] ... a-1 00:E3:0F:B6:C0:9F:D4:16:52:D2:41:A8:01:24:51:CD:3F:FB:B2:55#015#012a=ice-ufrag:VfqUSGBP#015#012a=ice-pwd:t5bLzDaNcqWUwzh7iEtyAZfweGo6#015#012a=candidate:04GQy5683m4TP1Da 1 UDP 2130706431 23.101.139.216 38518 typ host#015#012a=candidate:04GQy5683m4TP1Da 2 UDP 2130706430 23.101.139.216 38519 typ host#015#0126:result2:oke
Feb  8 23:04:43 Kamailio2 kamailio[59406]: INFO: <script>: Websocket Branch is {sip:85.2.10.3:58509;transport=WS} for {123455678}
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: Got valid command from 127.0.0.1:52689: offer - { "sdp": "v=0#015#012o=root 1141861088 1141861088 IN IP4 12.34.56.78#015#012s=Asterisk PBX 13.1.0#015#012c=IN IP4 12.34.56.78#015#012t=0 0#015#012m=audio 12230 RTP/AVP 9 8 107 0 101#015#012a=rtpmap:9 G722/8000#015#012a=rtpmap:8 PCMA/8000#015#012a=rtpmap:107 opus/48000/2#015#012a=rtpmap:0 PCMU/8000#015#012a=rtpmap:101 telephone-event/8000#015#012a=fmtp:101 0-16#015#012a=maxptime:60#015#012a=sendrecv#015#012", "ICE": "force", "direction": [ "internal" ], "flags": [ "extenal", "force", "trust-address" ], "replace": [ "origin",  ...
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: ... "session-connection" ], "transport-protocol": "RTP/SAVPF", "call-id": "220725c425526bc941dff8e972bd9458@12.34.56.78:50600", "received-from": [ "IP4", "12.34.56.78" ], "from-tag": "as4f0c032f", "command": "offer" }
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: Unknown flag encountered: 'extenal'
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: Unknown flag encountered: 'force'
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: [220725c425526bc941dff8e972bd9458@12.34.56.78:50600] Returning to SIP proxy: d3:sdp747:v=0#015#012o=root 1141861088 1141861088 IN IP4 23.101.139.216#015#012s=Asterisk PBX 13.1.0#015#012c=IN IP4 23.101.139.216#015#012t=0 0#015#012a=ice-lite#015#012m=audio 38518 RTP/SAVPF 9 8 107 0 101#015#012a=rtpmap:9 G722/8000#015#012a=rtpmap:8 PCMA/8000#015#012a=rtpmap:107 opus/48000/2#015#012a=rtpmap:0 PCMU/8000#015#012a=rtpmap:101 telephone-event/8000#015#012a=fmtp:101 0-16#015#012a=maxptime:60#015#012a=sendrecv#015#012a=rtcp:38519#015#012a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:f31jYQjjKBdYoqWYijx0V/ZtTfP17pTVW8NJGVQ4#015#012a=setup:actpass#015#012a=fingerprint:sh ...
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: [220725c425526bc941dff8e972bd9458@12.34.56.78:50600] ... a-1 00:E3:0F:B6:C0:9F:D4:16:52:D2:41:A8:01:24:51:CD:3F:FB:B2:55#015#012a=ice-ufrag:VfqUSGBP#015#012a=ice-pwd:t5bLzDaNcqWUwzh7iEtyAZfweGo6#015#012a=candidate:04GQy5683m4TP1Da 1 UDP 2130706431 23.101.139.216 38518 typ host#015#012a=candidate:04GQy5683m4TP1Da 2 UDP 2130706430 23.101.139.216 38519 typ host#015#0126:result2:oke
Feb  8 23:04:43 Kamailio2 kamailio[59406]: INFO: <script>: Websocket Branch is {sip:18.9.18.10:56917;transport=WS} for {123455678}
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: Got valid command from 127.0.0.1:52689: offer - { "sdp": "v=0#015#012o=root 1141861088 1141861088 IN IP4 12.34.56.78#015#012s=Asterisk PBX 13.1.0#015#012c=IN IP4 12.34.56.78#015#012t=0 0#015#012m=audio 12230 RTP/AVP 9 8 107 0 101#015#012a=rtpmap:9 G722/8000#015#012a=rtpmap:8 PCMA/8000#015#012a=rtpmap:107 opus/48000/2#015#012a=rtpmap:0 PCMU/8000#015#012a=rtpmap:101 telephone-event/8000#015#012a=fmtp:101 0-16#015#012a=maxptime:60#015#012a=sendrecv#015#012", "ICE": "force", "direction": [ "internal" ], "flags": [ "extenal", "force", "trust-address" ], "replace": [ "origin",  ...
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: ... "session-connection" ], "transport-protocol": "RTP/SAVPF", "call-id": "220725c425526bc941dff8e972bd9458@12.34.56.78:50600", "received-from": [ "IP4", "12.34.56.78" ], "from-tag": "as4f0c032f", "command": "offer" }
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: Unknown flag encountered: 'extenal'
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: Unknown flag encountered: 'force'
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: [220725c425526bc941dff8e972bd9458@12.34.56.78:50600] Returning to SIP proxy: d3:sdp747:v=0#015#012o=root 1141861088 1141861088 IN IP4 23.101.139.216#015#012s=Asterisk PBX 13.1.0#015#012c=IN IP4 23.101.139.216#015#012t=0 0#015#012a=ice-lite#015#012m=audio 38518 RTP/SAVPF 9 8 107 0 101#015#012a=rtpmap:9 G722/8000#015#012a=rtpmap:8 PCMA/8000#015#012a=rtpmap:107 opus/48000/2#015#012a=rtpmap:0 PCMU/8000#015#012a=rtpmap:101 telephone-event/8000#015#012a=fmtp:101 0-16#015#012a=maxptime:60#015#012a=sendrecv#015#012a=rtcp:38519#015#012a=crypto:1 AES_CM_128_HMAC_SHA1_80 inline:f31jYQjjKBdYoqWYijx0V/ZtTfP17pTVW8NJGVQ4#015#012a=setup:actpass#015#012a=fingerprint:sh ...
Feb  8 23:04:43 Kamailio2 rtpengine[55410]: [220725c425526bc941dff8e972bd9458@12.34.56.78:50600] ... a-1 00:E3:0F:B6:C0:9F:D4:16:52:D2:41:A8:01:24:51:CD:3F:FB:B2:55#015#012a=ice-ufrag:VfqUSGBP#015#012a=ice-pwd:t5bLzDaNcqWUwzh7iEtyAZfweGo6#015#012a=candidate:04GQy5683m4TP1Da 1 UDP 2130706431 23.101.139.216 38518 typ host#015#012a=candidate:04GQy5683m4TP1Da 2 UDP 2130706430 23.101.139.216 38519 typ host#015#0126:result2:oke
Feb  8 23:04:43 Kamailio2 kamailio[59438]: INFO: <script>: Reply from webrtc client {18.9.18.10:56917} for method {INVITE}: 100
Feb  8 23:04:43 Kamailio2 kamailio[59438]: INFO: <script>: Manage_Reply from webrtc client {18.9.18.10:56917} for method {INVITE}: 100

Feb  8 23:04:43 Kamailio2 kamailio[59438]: INFO: <script>: Reply from webrtc client {18.9.18.10:56917} for method {INVITE}: 180
Feb  8 23:04:43 Kamailio2 kamailio[59438]: INFO: <script>: Manage_Reply from webrtc client {18.9.18.10:56917} for method {INVITE}: 180

Feb  8 23:04:43 Kamailio2 kamailio[59438]: INFO: <script>: Reply from webrtc client {18.9.18.10:56917} for method {INVITE}: 482
Feb  8 23:04:43 Kamailio2 kamailio[59442]: INFO: <script>: Reply from webrtc client {85.2.10.3:58509} for method {INVITE}: 100
Feb  8 23:04:43 Kamailio2 kamailio[59442]: INFO: <script>: Manage_Reply from webrtc client {85.2.10.3:58509} for method {INVITE}: 100