[Kamailio-Users] issues with rtpproxy and kamailio

[Klaus Darilion]

of course it can not work - you have to fix the contact of the INVITE 
with fix nated contact - you also have to fix it ofor the 200 ok in a 
reply route.

further, fix_nated sdp is usually not needed. force_rtp_proxy() is 
usually sufficient. Make sure to call it only once. If this still does 
corrupt the SDP then its is a bug.

Please create a config file with the wizard from sipwise.com and study 
how NAT traversal is done - this is the correct way.

regards
klaus

Fabian Borot schrieb:
> I am trying to set up rtpproxy with kamailio and are having these 2 issues:
> 
> 1- the BYEs are not relayed to the other party, I have to hang up the 
> call at both ends
> 2- kamailio receives the INVITE from the calling party [behind a nat] 
> and relays it to the called party but the connection information in the 
> SDP has to IPs [the source IP and the RTPproxy IP together
> 
> c=IN IP4 204.9.239.6765.111.185.187
> 
> 
> user 100 is behind a NAT and user 101 is not but I want to force the 
> RTPs to go thru the rtpproxy server [ in the same IP as kamailio]
> the good and weird thing is that there is audio both ways.
> 
> this is my config file:
> 
> 
> 
> if (loose_route()) {
>                 # mark routing logic in request
>                 xlog("L_INFO","mylog: Loose Route section. Method: 
> [$rm].\n");
>                 append_hf("P-hint: rr-enforced\r\n");
>                 route(1);
>         };
> 
> 
>         if (uri==myself) {
>                 if (method=="REGISTER") {
>                         xlog("L_INFO","mylog: starting to process 
> REGISTER.Info: [$au].\n");
>                         if (!www_authorize("", "subscriber")) {
>                                 xlog("L_INFO","mylog: REGISTER came 
> without auth, sending challenge.\n");
>                                 www_challenge("", "0");
>                                 exit;
>                         };
>                         if (nat_uac_test("1")){
>                                 xlog("L_INFO","mylog: REGISTER-Device 
> behind NAT.\n");
>                                 fix_nated_register();
>                         }
>                         force_rport();
>                         save("location");
>                         xlog("L_INFO","mylog: save-location successful.\n");
>                         exit;
>                 } else if (method=="INVITE") {
>                         xlog("L_INFO","mylog: Processing INVITE.\n");
>                         if (!proxy_authorize("","subscriber")) {
>                                 xlog("L_INFO","mylog: INVITE came 
> without auth, sending challenge.\n");
>                                 proxy_challenge("","0");
>                                 exit;
>                         };
>                         consume_credentials();
>                         if (nat_uac_test("1")){
>                                 xlog("L_INFO","mylog: INVITE-Device 
> behind NAT.\n");
>                                 #fix_nated_contact();
>                                 fix_nated_sdp("10");
>                         }
>                         force_rtp_proxy();
>                         if (!lookup("location")) {
>                                 sl_send_reply("404", "Not Found");
>                                 xlog("L_INFO","mylog: lookup-location 
> failed, sending 404 Not Found. Method: [$rm].\n");
>                                 exit;
>                         };
>                         append_hf("P-hint: usrloc applied\r\n");
>                 };
>         };
>         route(1);
> }
> 
> route[1] {
>         # send it out now; use stateful forwarding as it works reliably
>         # even for UDP2TCP
>         t_on_reply("1");
>         if (t_relay()) {
>                 xlog("L_INFO","mylog: Route 1 section. Method [$rm].");
>         } else {
>                 sl_reply_error();
>                 xlog("L_INFO","mylog: Route 1 section. T_Relay failed. 
> Method [$rm].");
>         };
>         exit;
> }
> onreply_route[1] {
>         force_rtp_proxy("","65.111.185.187");
> }
> 
> 
> 
> thank you in advance
> 
> Fabian
>  
> 
> 
> 
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