[SR-Users] how to use fix_nated_sdp("2") with multiple media types
MARINA SERRANO MONTES
marinas at tid.es
Tue Oct 9 10:57:35 CEST 2012
Hi Daniel,
Thanks. But, I think there is any think I have not understand.
I have my route[MCU] module with the following code:
route [MCU]{
if (uri=~"^sip:[7,8][0-9]+@"){
xlog("Forward to MCU");
rewritehost("10.95.94.142");
rewriteport("5070");
rtpproxy_manage();
t_relay();
t_on_reply("CHANGE_SDP");
xlog("after forward to MCU");
exit;
}
}
onreply_route[CHANGE_SDP] {
xlog("CHANGE_SDP");
if(t_check_status("(200)|(183)"))
{
if(has_body("application/sdp"))
{
if(search("IN IP4 10.95.94.142"))
{
xlog("search IN IP4 .142");
fix_nated_sdp("2", "195.235.93.8"); //where 195.235.93.8 -->public IP of sip server with rtpproxy
}
}
}
}
If I comment t_on_reply("CHANGE_SDP") line, I can observe traffic from MCU to rtpproxy is received (testing using tcpdump), but traffic from endpoint to rtpproxy is not received and therefore, input traffic MCU is null. In this case, using only: rtpproxy_manage(), the IP in SDP are not replaced by rtpproxy IP.
If I don't comment t_on_reply("CHANGE_SDP"), in this case, I force to replace IP using "fix_nated_sdp("2", publicIP)" and I can observe using tcpdump in server than traffic from endpoint from rtpproxy is received, but traffic from rtpproxy to MCU is not received and traffic from MCU to rtpproxy is not received.
My question is, how can I set up using "rtpproxy_manage(),…."to allow all there traffic will be routed rightly through rtpproxy?
Should I add any new line in my config file? Anything to change?
Many thanks.
I attach part of the full route file:
# Main SIP request routing logic
# - processing of any incoming SIP request starts with this route
# - note: this is the same as route { ... }
request_route {
# NAT detection
route(NATDETECT);
### only initial requests (no To tag)
t_check_trans();
# record routing for dialog forming requests (in case they are routed)
# - remove preloaded route headers
remove_hf("Route");
if (is_method("INVITE"))
record_route_preset("195.235.93.8:5070;transport=TCP");
if (is_method("INVITE|SUBSCRIBE"))
record_route();
# account only INVITEs
if (is_method("INVITE"))
{
setflag(FLT_ACC); # do accounting
}
#ggb: TCP connection reuse
if (proto != UDP) {
add_contact_alias();
}
# dispatch requests to foreign domains
route(SIPOUT);
### requests for my local domains
if ($rU==$null)
{
# request with no Username in RURI
sl_send_reply("484","Address Incomplete");
exit;
}
route(MCU);
route(RELAY);
}
route[RELAY] {
# enable additional event routes for forwarded requests
# - serial forking, RTP relaying handling, a.s.o.
if (is_method("INVITE|SUBSCRIBE")) {
t_on_branch("MANAGE_BRANCH");
t_on_reply("MANAGE_REPLY");
}
if (is_method("INVITE")) {
t_on_failure("MANAGE_FAILURE");
}
if (!t_relay()) {
sl_reply_error();
}
exit;
}
# Caller NAT detection route
route[NATDETECT] {
#!ifdef WITH_NAT
force_rport();
if (nat_uac_test("19")) {
if (is_method("REGISTER")) {
xlog("fix_nated_register");
fix_nated_register();
} else {
xlog("fix_nated_contact");
fix_nated_contact();
}
setflag(FLT_NATS);
}
#!endif
return;
}
# RTPProxy control
route[NATMANAGE] {
#!ifdef WITH_NAT
if (is_request()) {
if(has_totag()) {
if(check_route_param("nat=yes")) {
setbflag(FLB_NATB);
}
}
}
if (!(isflagset(FLT_NATS) || isbflagset(FLB_NATB)))
return;
rtpproxy_manage("", "195.235.93.8");
if (is_request()) {
if (!has_totag()) {
add_rr_param(";nat=yes");
}
}
if (is_reply()) {
if(isbflagset(FLB_NATB)) {
fix_nated_contact();
}
}
#!endif
return;
}
# Routing to foreign domains
route[SIPOUT] {
if (!uri==myself)
{
append_hf("P-hint: outbound\r\n");
route(RELAY);
}
}
# manage outgoing branches
branch_route[MANAGE_BRANCH] {
xdbg("new branch [$T_branch_idx] to $ru\n");
route(NATMANAGE);
}
# manage incoming replies
onreply_route[MANAGE_REPLY] {
xdbg("incoming reply\n");
#ggb: TCP connection reuse
add_contact_alias();
if(status=~"[12][0-9][0-9]")
route(NATMANAGE);
}
onreply_route[CHANGE_SDP] {
xlog("CHANGE_SDP");
if(t_check_status("(200)|(183)"))
{
if(has_body("application/sdp"))
{
if(search("IN IP4 10.95.94.142"))
{
xlog("search IN IP4 .142");
fix_nated_sdp("2", "195.235.93.8");
}
}
}
}
# manage failure routing cases
failure_route[MANAGE_FAILURE] {
route(NATMANAGE);
if (t_is_canceled()) {
exit;
}
#!ifdef WITH_BLOCK3XX
# block call redirect based on 3xx replies.
if (t_check_status("3[0-9][0-9]")) {
t_reply("404","Not found");
exit;
}
#!endif
}
route [MCU]{
if (uri=~"^sip:[7,8][0-9]+@"){
xlog("Forward to MCU");
rewritehost("10.95.94.142");
rewriteport("5070");
rtpproxy_manage();
t_relay();
t_on_reply("CHANGE_SDP");
xlog("after forward to MCU");
exit;
}
}
Br,
Marina
From: Daniel-Constantin Mierla <miconda at gmail.com<mailto:miconda at gmail.com>>
Reply-To: "miconda at gmail.com<mailto:miconda at gmail.com>" <miconda at gmail.com<mailto:miconda at gmail.com>>
Date: martes 9 de octubre de 2012 00:18
To: Marina Serrano Montes <marinas at tid.es<mailto:marinas at tid.es>>
Cc: "SIP Router - Kamailio (OpenSER) and SIP Express Router (SER) - Users Mailing List" <sr-users at lists.sip-router.org<mailto:sr-users at lists.sip-router.org>>, Vicente Hernando <vhernando at systemonenoc.com<mailto:vhernando at systemonenoc.com>>
Subject: Re: [SR-Users] how to use fix_nated_sdp("2") with multiple media types
Hello,
you should not set the second parameter of rtpproxy_manage(...), let it be the one returned by rtpproxy.
And yes, all the occurrences of IP addresses in c= lines will be replaced by the rtpproxy ip, but providing different ports for each media stream.
Practically the rtp streams are going from end device to rtpproxy and then based on port will be delivered to different IPs of the MCU. Also, the MCU will send from different IPs to RTPProxy on different ports and from there to the end device.
Cheers,
Daniel
On 10/8/12 6:05 PM, MARINA SERRANO MONTES wrote:
Hi Daniel,
I have tested using "rtpproxy_manage("", public IP), but in this case, it replaces all the c= lines with this public IP, included c=lines in media descriptions and then, the rtp traffic is not routing to the right IP in MCU.
Have I to set up any value/param….to route rtp traffic through rtpproxy in sip server and then it will dispatch RTP packets to MCU?
Thanks.
Br,
Marina
From: Daniel-Constantin Mierla <miconda at gmail.com<mailto:miconda at gmail.com>>
Reply-To: "miconda at gmail.com<mailto:miconda at gmail.com>" <miconda at gmail.com<mailto:miconda at gmail.com>>
Date: lunes 8 de octubre de 2012 16:04
To: "SIP Router - Kamailio (OpenSER) and SIP Express Router (SER) - Users Mailing List" <sr-users at lists.sip-router.org<mailto:sr-users at lists.sip-router.org>>
Cc: Vicente Hernando <vhernando at systemonenoc.com<mailto:vhernando at systemonenoc.com>>, Marina Serrano Montes <marinas at tid.es<mailto:marinas at tid.es>>
Subject: Re: [SR-Users] how to use fix_nated_sdp("2") with multiple media types
Hello,
I understood that Marina is looking for the option of being able to use different IP addresses for updating various c= lines in SDP.
fix_nated_sdp(...) can work only with one IP address given as second parameter (or taken for source address of the packet).
Perhaps fix_nated_sdp(...) can be easily extended to support a list of ip addresses in the second parameter. For now the solution is to use rtpproxy to rewrite all the IP addresses in c= lines with the IP address of the rtpproxy. RTPProxy will then dispatch RTP to the right IP address assigned for each media stream.
Regarding the patch sent by Vicente, I just replied on sr-dev mailing list.
Cheers,
Daniel
On 10/8/12 3:25 PM, Vicente Hernando wrote:
Hello Marina,
there is a bug in sdp parser about c IPs which are not correctly reset for non existent c values in streams.
I have still not uploaded it to master branch, sorry.
May be it is related to your issue, in this link you have the attached patch.
http://lists.sip-router.org/pipermail/sr-dev/2012-September/016440.html
Kind regards,
Vicente.
On 10/08/2012 01:18 PM, MARINA SERRANO MONTES wrote:
Hi,
I have a doubt about how to use "fix_nated_sdp("2")" function when we have an scenario with multiple media types (audio and video) and the param "c" in sdp for each media type has a different IP.
We are using a SCOPIA 400 MCU to multi-party in a call, and it will set up different IP to send RTP depend on media type.
I have tested this function, but it rewrites always all the "c" parameter with the same value.
Is there any option to use the function or to rewrite "c" value for each media type independently?
Many thanks.
Br,
Marina
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--
Daniel-Constantin Mierla - http://www.asipto.comhttp://twitter.com/#!/miconda<http://twitter.com/#%21/miconda> - http://www.linkedin.com/in/miconda
Kamailio Advanced Training, Berlin, Nov 5-8, 2012 - http://asipto.com/u/kat
Kamailio Advanced Training, Miami, USA, Nov 12-14, 2012 - http://asipto.com/u/katu
________________________________
Este mensaje se dirige exclusivamente a su destinatario. Puede consultar nuestra política de envío y recepción de correo electrónico en el enlace situado más abajo.
This message is intended exclusively for its addressee. We only send and receive email on the basis of the terms set out at:
http://www.tid.es/ES/PAGINAS/disclaimer.aspx
--
Daniel-Constantin Mierla - http://www.asipto.comhttp://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Kamailio Advanced Training, Berlin, Nov 5-8, 2012 - http://asipto.com/u/kat
Kamailio Advanced Training, Miami, USA, Nov 12-14, 2012 - http://asipto.com/u/katu
________________________________
Este mensaje se dirige exclusivamente a su destinatario. Puede consultar nuestra política de envío y recepción de correo electrónico en el enlace situado más abajo.
This message is intended exclusively for its addressee. We only send and receive email on the basis of the terms set out at:
http://www.tid.es/ES/PAGINAS/disclaimer.aspx
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