[Serusers] Contact header during INVITE - sr-users

4 Apr 2006


      Hello,
I have an issue with the fix_nated_contact() function. OpenSer is supposed
to change Contact header, but it only changes it in the INVITE message, but
not in the OK response. As a consequence, ACK messages contain
sip:test@192.168.1.1:5060 and not the public ip. OpenSer doesn't know how to
handle that ACK and forward it to 192.168.1.1:5060.
The same issue occurs in CANCEL/487. Changes are done in CANCEL Contact
header, but not in 487 reply. No problem for BYE, as OK response doesn't
need an ACK
I suppose I have something wrong in my cfg file, but I can't find it out.
Regards,
Paul
Openser.Cfg:
...default loadmodules and modparam ...
# 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;
};
# 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();
force_rport();
fix_nated_register();
fix_nated_contact();
};
#if(search("Contact")){
#setflag(6);
#force_rport();
# fix_nated_contact();
#};
if(method!="REGISTER" && method!="ACK")
{
#record everything besides registers and acks
setflag(1);
setflag(3);
};
# subsequent messages withing a dialog should take the
# path determined by record-routing
if (loose_route()) {
# mark routing logic in request
append_hf("P-hint: rr-enforced\r\n");
route(1);
};
if (!uri==myself) {
# mark routing logic in request
append_hf("P-hint: outbound\r\n");
# if you have some interdomain connections via TLS
#if(uri=~"@tls_domain1.net") {
#     t_relay_to_tls("IP_domain1","port_domain1");
#     exit;
#} else if(uri=~"@tls_domain2.net") {
#     t_relay_to_tls("IP_domain2","port_domain2");
#     exit;
#}
route(1);
};
# if the request is for other domain use UsrLoc
# (in case, it does not work, use the following command
# with proper names and addresses in it)
if (uri==myself) {
if (method=="REGISTER") {
#change contact field IP and port by those received really
used after NAT rewritting by router
#fix_nated_contact();
#force openSer to respond on the port from which the
request has been sent insteed of the port
#in contact field.
force_rport();
# Uncomment this if you want to use digest authentication
if (!www_authorize("mydomain", "subscriber")) {
www_challenge("mydomain ", "0");
exit;
};
setflag(1);
setflag(3);
fix_nated_register();
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
# even for UDP2TCP
if (!t_relay()) {
sl_reply_error();
};
exit;
}