[Users] one way audio

[Bogdan-Andrei Iancu]

Hi,

check  via network traces that the replies really have a proper SDP 
body. Note that 180 does not has one.

regards,
bogdan

Jayesh Nambiar wrote:

> Hi all,
> I am jus trying to experiment strange things. please tell me if this 
> is possible. I have an user behind NAT calling a user on pstn side. 
> Since the pstn gateway is on a public IP, I dont use mediaproxy, what 
> i do before an invite is:
> fix_nated_contact();
> fix_nated_sdp("15");
> This call is successful and both the parties can hear. But again when 
> a user at public IP trues to contact the user behind NAT, there is 
> only "one way audio". Here also I do a fix_nated_contact() and 
> fix_nated_sdp("15") in the onreply_route[], but I get the foll error 
> in my syslog.
> Mar 23 14:36:19 switch2 /usr/local/sbin/openser[29070]: ERROR: 
> extract_mediaip: no `c=' in SDP
> Mar 23 14:36:19 switch2 /usr/local/sbin/openser[29070]: ERROR: 
> extract_mediaip: no `o=' in SDP
> Can someone pls explain what these errors are and why do they occur. 
> My cfg file is below:
> debug=9            # debug level (cmd line: -dddddddddd)
> fork=yes
> log_stderror=no
> check_via=no    # (cmd. line: -v)
> dns=no          # (cmd. line: -r)
> rev_dns=no      # (cmd. line: -R)
> listen=202.XX.XX.XX
> port=5060
> children=4
> fifo="/tmp/openser_fifo"
> loadmodule "/usr/local/lib/openser/modules/mysql.so"
> loadmodule "/usr/local/lib/openser/modules/sl.so"
> loadmodule "/usr/local/lib/openser/modules/tm.so"
> loadmodule "/usr/local/lib/openser/modules/rr.so"
> loadmodule "/usr/local/lib/openser/modules/maxfwd.so"
> loadmodule "/usr/local/lib/openser/modules/usrloc.so"
> loadmodule "/usr/local/lib/openser/modules/registrar.so"
> loadmodule "/usr/local/lib/openser/modules/textops.so"
> loadmodule "/usr/local/lib/openser/modules/auth.so"
> loadmodule "/usr/local/lib/openser/modules/auth_db.so"
> loadmodule "/usr/local/lib/openser/modules/mediaproxy.so"
> loadmodule "/usr/local/lib/openser/modules/nathelper.so"
> loadmodule "/usr/local/lib/openser/modules/domain.so"
> modparam("auth_db|usrloc",
>         "db_url", "mysql://openser:openserrw@localhost/openser")
> modparam("usrloc", "db_mode", 2)
> modparam("auth_db", "calculate_ha1", 1)
> modparam("auth_db", "password_column", "password")
> modparam("registrar", "nat_flag", 6)
> modparam("rr", "enable_full_lr", 1)
> modparam("mediaproxy", "natping_interval", 30)
> modparam("nathelper", "rtpproxy_disable", 1)
> modparam("nathelper", "natping_interval", 0)
>  
> route{
>         if (!mf_process_maxfwd_header("10")) {
>                 sl_send_reply("483","Too Many Hops");
>                 exit;
>         };
>         if (msg:len >=  2048 ) {
>                 sl_send_reply("513", "Message too big");
>                 exit;
>         };
>         if(!method=="REGISTER") {
>                 record_route();
>         };
>         if (loose_route()) {
>                 append_hf("P-hint: rr-enforced\r\n");
>                 route(1);
>                 return;
>         };
>         if (uri!=myself) {
>             route(1);
>             return;
>         };
>  if(uri==myself) {
>                 if(method=="REGISTER") {
>                 sl_send_reply("100", "Trying");
>                 if (!search("^Contact:\ +\*") && client_nat_test("7")) {
>                 setflag(6);
>                 force_rport();
>                 fix_nated_contact();
>                 };
>                 if (!www_authorize("","subscriber")) {
>                 www_challenge("", "0");
>                 exit;
>                 };
>                 save("location");
>                 exit;
>                 };
>                 if(method=="INVITE") {
>                         if (client_nat_test("3")) {
>                         force_rport();
>                         fix_nated_sdp("15");
>                         fix_nated_contact();
>                         setflag(7);
>                         };
>                         if(src_ip==202.XX.XX.44) { #my pstn gateway. 
> calls are only for registered users
>                                 if(!lookup("location")) {
>                                 sl_send_reply("404", "User not found");
>                                 exit;
>                                 };
>                         route(1);
>                         };
>                 if (!proxy_authorize("","subscriber")) {
>                         proxy_challenge("", "0");
>                         exit;
>                         };
>                         route(2);
>                         return;
>                 };
>         };
> }
> route[1] {
>         t_on_reply("1");
>         if(!t_relay()) {
>                 sl_reply_error();
>                 exit;
>         };
> }
> route[2] {
>         if(uri=~"^sip:0[0-9]*@") {
>                 strip(1);
>                 rewritehost("202.80.61.1");
>                 route(1);
>                 exit;
>         };
>         if(!lookup("location")) {
>                sl_send_reply("404", "User not found");
>                exit;
>         };
>         route(1);
>         exit;
> }
> onreply_route[1] {
>         if ((isflagset(6) || isflagset(7)) &&
>             (status=~"(180)|(183)|2[0-9][0-9]")) {
>                 if (!search("^Content-Length:\ +0")) {
>                 force_rport();
>                 fix_nated_sdp("15");
>                 fix_nated_contact();
>                 };
>         };
> }
>
>
>  
>  
>
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