Configuration file for OpenSER v1.2.x to do VoIP NAT traversal using RTPProxy.

[Djappa]

Hello;
I have configured the Openser server to do VoIP NAT traversal. But i havee a problem:
- I run the openser server a
- Theni execute this command /etc/init.d/openser status, i have this response : Status of openser: openser is not running.

This is my config file openser.cfg:

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

#set module path
mpath="/usr/lib/openser/modules/"

# Uncomment this if you want to use SQL database
loadmodule "mysql.so"
loadmodule "sl.so"
loadmodule "tm.so"
loadmodule "rr.so"
loadmodule "maxfwd.so"
loadmodule "usrloc.so"
loadmodule "registrar.so"
loadmodule "textops.so"
loadmodule "mi_fifo.so"
loadmodule "presence.so"
loadmodule "nathelper.so"

# Uncomment this if you want digest authentication
# mysql.so must be loaded !
loadmodule "auth.so"
loadmodule "auth_db.so"

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

# -- mi_fifo params --
modparam("mi_fifo", "fifo_name", "/tmp/openser_fifo")

# -- usrloc params --
#modparam("usrloc", "db_mode", 0)
# Uncomment this if you want to use SQL database
# for persistent storage and comment the previous line
modparam("usrloc", "db_mode", 2)
modparam("usrloc", "nat_bflag", 6)

# -- auth params --
modparam("auth_db", "calculate_ha1", yes)
modparam("auth_db", "password_column", "password")

# -- rr params --
# add value to ;lr param to make some broken UAs happy
modparam("rr", "enable_full_lr", 1)

# -- presence params --
modparam("presence|usrloc", "db_url",
"mysql://openserpenserrw@127.0.0.1/openser")
modparam("presence", "force_active", 1)
modparam("presence", "max_expires", 3600)
modparam("presence", "server_address", "sip:192.168.1.4:5060")

# -- nathelper
modparam("nathelper", "rtpproxy_sock", "udp:127.0.0.1:7890")
modparam("nathelper", "natping_interval", 30)
modparam("nathelper", "ping_nated_only", 1)
modparam("nathelper", "sipping_bflag", 7)
modparam("nathelper", "sipping_from", "sip:toto@192.168.1.4")

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

# main routing logic

route{

# initial sanity checks -- messages with
# max_forwards==0, or excessively long requests

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;
};

# NAT detection
route(4);

# we record-route all messages -- to make sure that
# subsequent messages will go through our proxy; that's
# particularly good if upstream and downstream entities
# use different transport protocol

if (!method=="REGISTER")
record_route();

# subsequent messages withing a dialog should take the
# path determined by record-routing

if (loose_route()) {
append_hf("P-hint: rr-enforced\r\n");
route(1);
};

if (!uri==myself) {
append_hf("P-hint: outbound\r\n");
route(1);
};

if (uri==myself)
{
if( is_method("PUBLISH|SUBSCRIBE"))
route(2);

if (method=="REGISTER")
{
# Uncomment this if you want to use digest authentication
if (!www_authorize("domain.priv", "subscriber")) {
www_challenge("domain.priv", "0");
exit;
};

if (isflagset(5)) {
setbflag(6);
# if you want OPTIONS natpings uncomment next
# setbflag(7);
};

save("location");
exit;
};

lookup("aliases");
if (!uri==myself) {
append_hf("P-hint: outbound alias\r\n");
route(1);
};

# native SIP destinations are handled using our USRLOC DB

if (!lookup("location")) {
sl_send_reply("404", "Not Found");
exit;
};
append_hf("P-hint: usrloc applied\r\n");
};
route(1);
}


route[1] {
# send it out now; use stateful forwarding as it works reliably

if (subst_uri('/(sip:.*);nat=yes/\1/')){
setbflag(6);
};

if (isflagset(5)||isbflagset(6)) {
route(3);
}

if (!t_relay()) {
sl_reply_error();
};
exit;
}

route[2]
{
sl_send_reply("100","trying");
if (!t_newtran()){
sl_reply_error();
exit;
};

append_to_reply("Contact: <sip:192.168.1.4:5060>\r\n");
if(is_method("PUBLISH")){
handle_publish();
t_release();
}

else if( is_method("SUBSCRIBE")){
handle_subscribe();
t_release();
};
}
route[3] {
if (is_method("BYE|CANCEL")) {
unforce_rtp_proxy();
} else if (is_method("INVITE")) {
force_rtp_proxy();
t_on_failure("1");
};

if (isflagset(5))
search_append('Contact:.*sip:[^>[:cntrl:]]*', ';nat=yes');
t_on_reply("1");
}

failure_route[1] {
if (isbflagset(6) || isflagset(5)) {
unforce_rtp_proxy();
}
}

onreply_route[1] {
if ((isflagset(5) || isbflagset(6)) && status=~"(183)|(2[0-9][0-9])") {
force_rtp_proxy();

}
search_append('Contact:.*sip:[^>[:cntrl:]]*', ';nat=yes');

if (isbflagset(6)) {
fix_nated_contact();
}
exit;
}

route[4] {
force_rport();
if (nat_uac_test("19")) {
if (method=="REGISTER") {
fix_nated_register();
} else {
fix_nated_contact();
};
setflag(5);
};
}

Please help me.

[n8twj]

Try this - open up openser.cfg in your favorite text editor.

Make the following changes:

fork = no
debug = 4
log_stderr = yes


Ensure all old OpenSER processes are dead (kill -9 openser)

Then start openser directly - by typing in just openser

I bet you will get a lot of output. The last few lines will show you where the error message is located.

Send in the last few lines of that output if you are still confused.

Also, check out my OpenSER How To. It may help you understand things a little bit better.

[Djappa]

I have entered the debbuging mode
I ensured that the openser process is killed and I restarted it (by typing openser)
--> This error is displayed:

0(0) ERROR:nathelper:fixup_fix_nated_register: you must set 'received_avp' parameter. Must be same value as parameter 'received_avp' of registrar module
0(0) ERROR: fix_actions: fixing failed (code=-1) at cfg line 248
ERROR: error -1 while trying to fix configuration.

Have you an idea about this error message??

Thank you for your help.

[cowst]

I don't know if you still need help here, but you have to set the two parameters written in the error message.
i used the examples from the documentation and seems to work.
( even if I have not clear the meaning of i:42 and s:rcv ) modparam("nathelper", "received_avp", "$avp(i:42)")
modparam("registrar", "received_avp", "$avp(s:rcv)")