Hi,

I have a strange problem with stateful processing using t_relay and t_newtran. For normal routing I use t_relay but all sems modules require the usage of t_newtran, e.g.:

if ( !t_newtran() ) { sl_reply_error(); }; t_write_unix("/tmp/am_sock", "voicemail");

The problem now is how to handle BYE and CANCEL messages for deestablishing connections. For the echo server (reachable at 4242@192.168.11.1) I use the following code for getting back transaction and closing socket to sems:

if ( uri=~"^sip:4242@" && ( method=="BYE" || method=="CANCEL" ) ) { if (!t_newtran()) { sl_send_reply("500", "could not create transaction"); break; }; if( !t_write_unix("/tmp/am_sock", "bye") ) { t_reply("500", "error contacting sems"); };

break;

}

This works fine. But how can I do this for voicemail? The uri will not be changed so I can't destinguish between BYE for a normal and a voicemail connection.

All other destinations do not use t_newtran (and no socket to sems) so simply t_relay is used for BYE and CANCEL messages.

The whole ser.cfg is attached below.

Regards and thanks for your help, Dennis

# ser.cfg # ----------- global configuration parameters ------------------------

debug=3 fork=yes log_stderror=yes check_via=no dns=no rev_dns=no fifo="/tmp/ser_fifo" fifo_mode=0666 fifo_db_url="mysql://ser:heslo@localhost/ser" listen=192.168.11.1 listen=127.0.0.1 alias=192.168.11.1 alias=127.0.0.1

# ------------------ module loading ----------------------------------

loadmodule "/usr/local/lib/ser/modules/mysql.so" loadmodule "/usr/local/lib/ser/modules/sl.so" loadmodule "/usr/local/lib/ser/modules/tm.so" loadmodule "/usr/local/lib/ser/modules/rr.so" loadmodule "/usr/local/lib/ser/modules/maxfwd.so" loadmodule "/usr/local/lib/ser/modules/usrloc.so" loadmodule "/usr/local/lib/ser/modules/registrar.so" loadmodule "/usr/local/lib/ser/modules/auth.so" loadmodule "/usr/local/lib/ser/modules/auth_db.so" loadmodule "/usr/local/lib/ser/modules/acc.so" loadmodule "/usr/local/lib/ser/modules/exec.so" loadmodule "/usr/local/lib/ser/modules/group.so" loadmodule "/usr/local/lib/ser/modules/msilo.so" loadmodule "/usr/local/lib/ser/modules/print.so" loadmodule "/usr/local/lib/ser/modules/textops.so" loadmodule "/usr/local/lib/ser/modules/uri.so" loadmodule "/usr/local/lib/ser/modules/uri_db.so" loadmodule "/usr/local/lib/ser/modules/xlog.so" loadmodule "/usr/local/lib/ser/modules/speeddial.so" loadmodule "/usr/local/lib/ser/modules/domain.so" loadmodule "/usr/local/lib/ser/modules/mediaproxy.so"

# ----------------- setting module-specific parameters ---------------

modparam("usrloc", "db_mode", 1) modparam("auth_db", "calculate_ha1", yes) modparam("auth_db", "password_column", "password") modparam("rr", "enable_full_lr", 1) modparam("acc", "log_level", 1) modparam("acc", "log_flag", 1 ) modparam("acc", "log_missed_flag", 2) modparam("acc", "db_url", "mysql://ser:heslo@localhost/ser") modparam("acc", "db_flag", 1) modparam("acc", "db_missed_flag", 2) modparam("acc", "log_fmt", "cdfimorstup") modparam("xlog", "buf_size", 8192) modparam("registrar", "default_expires", 180) modparam("registrar", "nat_flag", 3) modparam("mediaproxy", "natping_interval", 52) modparam("mediaproxy", "mediaproxy_socket", "/var/run/proxydispatcher.sock") modparam("mediaproxy", "sip_asymmetrics", "/usr/local/etc/ser/sip-asymmetrics-clients") modparam("mediaproxy", "rtp_asymmetrics", "/usr/local/etc/ser/rtp-asymmetrics-clients")

# ------------------------- request routing logic ------------------- # # main routing logic # # --------------------------------------------------------------------

route {

if ( !mf_process_maxfwd_header("10") ) { log(1, "LOG: Too many hops. LOOP?\n"); if ( method!="ACK" ) { sl_send_reply("483", "Too many hops"); } break; };

if (msg:len >= max_len ) { sl_send_reply("513", "Message too big"); break; };

record_route();

if ( uri=~"^sip:4242@" && ( method=="BYE" || method=="CANCEL" ) ) { if (!t_newtran()) { sl_send_reply("500", "could not create transaction"); break; };

if( !t_write_unix("/tmp/am_sock", "bye") ) { t_reply("500", "error contacting sems"); };

break;

} else if ( method=="BYE" || method=="CANCEL" ) {

end_media_session(); setflag(1); }

if ( client_nat_test("3") && !search("^Record-Route:") ) { force_rport(); fix_contact(); };

if ( loose_route() ) { if (method=="INVITE" || method=="ACK") { use_media_proxy(); };

t_relay(); break; };

if ( method=="ACK" ) { use_media_proxy(); }

######

if ( !(uri==myself) ) {

append_hf("P-hint: OUTBOUND ON INTERNET\r\n"); if ( !t_relay() ) { sl_reply_error(); break; };

break; };

######

if ( uri==myself ) {

if ( method=="REGISTER" ) {

if ( client_nat_test("3") ) { setflag(3); force_rport(); fix_contact(); }

if ( !www_authorize("192.168.11.1", "subscriber") ) { www_challenge("192.168.11.1", "1"); break; }

if ( !save("location") ) { sl_reply_error(); break; };

break;

} # method==register

else if ( method=="INVITE" ) {

if ( !proxy_authorize("", "subscriber") ) { proxy_challenge("", "1" ); break; };

t_on_failure("1"); t_on_reply("1"); use_media_proxy();

# ------------------------------------------------------------------------ # echo server # ------------------------------------------------------------------------

if ( uri=~"^sip:4242@.*" ) {

# switch to statefull mode: if ( !t_newtran() ) { sl_send_reply("500","could not create transaction"); break; };

if( !t_write_unix("/tmp/am_sock", "echo") ) { t_reply("500", "error contacting sems"); };

break;

}

# offline? if ( !lookup("location") ) { if ( !t_newtran() ) { sl_reply_error(); };

t_write_unix("/tmp/am_sock", "voicemail");

break; };

} # method==invite

# route

append_hf("P-hint: USRLOC\r\n"); if ( !t_relay() ) { end_media_session(); sl_reply_error(); break; };

} ; # uri==myself

} /* end of initial routing logic */

############################################################################################

onreply_route[1] { if ( status=~"(183)|(2[0-9][0-9])" ) { if ( client_nat_test("1") ) { fix_contact(); }; use_media_proxy(); }; }

failure_route[1] { end_media_session(); }