[OpenSIPS-Users] RTP Delay when changing RTP Source port
Trevor Steyn
trevor at webon.co.za
Wed Jul 22 21:04:00 CEST 2015
Hi Rik
I have tried using rtpproxy_offer/answer functions with the same results,
if (has_body("application/sdp")) {
if (rtpproxy_offer('iewz20')) {
t_on_reply("1");
} else {
t_on_reply("2");
}
}
t_on_failure("GW_FAILOVER");
route(RELAY);
}
onreply_route[1]
{
if (has_body("application/sdp"))
rtpproxy_answer('eiwz20');
}
onreply_route[2]
{
if (has_body("application/sdp"))
rtpproxy_offer('iewz20');
}
below you can see that Signalling and RTP flows.
You will see rtpproxy only starts relaying packets ~10seconds later
after the 200OK even though Callee is sending RTP
http://salamander.iburst.co.za:8000/personal/signalling.txt
Seems the issue here is when RTP stream is already established (183 with
SDP) and the 200OK comes along with different source port it takes some
time before RTP proxy relays the packets to caller.
Regards
Trevor
On 22/07/2015 13:30, Rik Broers wrote:
> I think rtpproxy_engage doesnt work correct with the fact that you bridge internal to external. Also says in docs:
> "... Note that when used in bridge mode, this function might advertise wrong interfaces in SDP (due to the fact that OpenSIPS is not aware of the RTPProxy configuration), so you might face an undefined behavior."
>
> You could try and use the rtpproxy_offer and answer functions. put in the reply route an if (has_body("application/sdp")) to also catch the 183 with sdp .The docs have examples on how to use them and how to trigger on reply routes.
>
> Regards,
> Rik
>
> -----Oorspronkelijk bericht-----
> Van: users-bounces at lists.opensips.org [mailto:users-bounces at lists.opensips.org] Namens Trevor Steyn
> Verzonden: woensdag 22 juli 2015 9:52
> Aan: users at lists.opensips.org
> Onderwerp: [OpenSIPS-Users] RTP Delay when changing RTP Source port
>
> Hi, All
>
> Still quite new to opensips I have the following configuration running on
>
> version: opensips 2.1.0 (x86_64/linux)
> flags: STATS: On, DISABLE_NAGLE, USE_MCAST, SHM_MMAP, PKG_MALLOC, F_MALLOC, FAST_LOCK-ADAPTIVE_WAIT ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535 poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
> main.c compiled on 06:22:03 May 8 2015 with gcc 4.4.7
>
>
> (Topology Hiding)
> UAC -------> Opensips(Internal) Opensips(External) ----> UAS
> (RTP PROXY BRIDGE)
>
>
>
> what i am experiencing is the following call is setup between UAC and UAS through opensips UAS sets up RTP with a 183 Session Progress message with SDP Shortly after we get a 180 ringing (i understand this is not correct but cannot be changed), When a 200OK is eventually sent the Source Port is different to what was in the SDP on the 183 message.
>
> Media starts flowing from UAS to opensips External from the new source port but for the first 7 seconds or so opensips/rtpproxy does not pass on this media to UAC from Internal.
>
> I run rtp proxy as follows
>
> rtpproxy -l <Internal IP>/<External IP> -s udp:127.0.0.1:12221 -m 25000 -M 65000 -F -d DBUG:LOCAL1
>
> route{
> #script_trace( 3, "$rm from $si, ruri=$ru", "me");
>
> if (!mf_process_maxfwd_header("10")) {
> sl_send_reply("483","Too Many Hops");
> exit;
> }
>
> if ( check_source_address("1","$avp(trunk_attrs)") ) {
> # request comes from trunks
> setflag(IS_TRUNK);
> } else if ( is_from_gw() ) {
> # request comes from GWs
> } else {
> send_reply("403","Forbidden");
> exit;
> }
>
> if (has_totag()) {
> # sequential request withing a dialog should
> # take the path determined by record-routing
> if(topology_hiding_match()) {
> # validate the sequential request against dialog
> if ( $DLG_status!=NULL && !validate_dialog() ) {
> xlog("In-Dialog $rm from $si (callid=$ci) is not valid according to dialog\n");
> ## exit;
> }
>
> if (is_method("BYE")) {
> setflag(ACC_DO); # do accounting ...
> setflag(ACC_FAILED); # ... even if the transaction fails
> } else if (is_method("INVITE")) {
> # even if in most of the cases is useless, do RR for
> # re-INVITEs alos, as some buggy clients do change route set
> # during the dialog.
> record_route();
> }
> route(RELAY);
> } else {
> if ( is_method("ACK") ) {
> if ( t_check_trans() ) {
> # non loose-route, but stateful ACK; must be an ACK after
> # a 487 or e.g. 404 from upstream server
> t_relay();
> exit;
> } else {
> # ACK without matching transaction ->
> # ignore and discard
> exit;
> }
> }
> sl_send_reply("404","Not here");
> }
> exit;
> }
>
> #### INITIAL REQUESTS
>
> if ( !isflagset(IS_TRUNK) ) {
> ## accept new calls only from trunks
> send_reply("403","Not from trunk");
> exit;
> }
>
> # CANCEL processing
> if (is_method("CANCEL")) {
> if (t_check_trans())
> t_relay();
> exit;
> } else if (!is_method("INVITE")) {
> send_reply("405","Method Not Allowed");
> exit;
> }
>
> if ($rU==NULL) {
> # request with no Username in RURI
> sl_send_reply("484","Address Incomplete");
> exit;
> }
>
> t_check_trans();
>
> # preloaded route checking
> if (loose_route()) {
> xlog("L_ERR",
> "Attempt to route with preloaded Route's [$fu/$tu/$ru/$ci]");
> if (!is_method("ACK"))
> sl_send_reply("403","Preload Route denied");
> exit;
> }
>
> # record routing
> record_route();
>
> setflag(ACC_DO); # do accounting
>
>
> # create dialog with timeout
> if ( !create_dialog("B") ) {
> send_reply("500","Internal Server Error");
> exit;
> }
>
>
> dp_translate("1","$rU/$rU");
>
> # route calls based on prefix
> if ( !do_routing("1",,,,"$var(gw_attributes)") ) {
> send_reply("404","No Route found");
> exit;
> }
> if (is_method("INVITE")) {
> force_send_socket(udp:<EXternal IP:5060);
> rtpproxy_engage('ierz20');
> #rtpproxy_engage();
> topology_hiding();
> }
>
>
> t_on_failure("GW_FAILOVER");
> route(RELAY);
> }
>
>
> route[RELAY] {
> if (!t_relay()) {
> sl_reply_error();
> };
> exit;
> }
>
>
> failure_route[GW_FAILOVER] {
> if (t_was_cancelled()) {
> exit;
> }
>
> # detect failure and redirect to next available GW
> if (t_check_status("(408)|([56][0-9][0-9])")) {
> xlog("Failed GW $rd detected \n");
>
> if ( use_next_gw() ) {
> t_on_failure("GW_FAILOVER");
> t_relay();
> exit;
> }
>
> send_reply("500","All GW are down");
> }
> }
>
>
> local_route {
> if (is_method("BYE") && $DLG_dir=="UPSTREAM") {
>
> acc_log_request("200 Dialog Timeout");
>
> }
> }
>
>
> Below you can see the call flow
>
> http://salamander.iburst.co.za:8000/personal/signalling.txt
>
> I have tried a most of the options on rtpproxy_engage with no luck
>
> Regards
> Trevor Steyn
>
>
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