Hi,
After studying some ser.cfg files, I could
route a SIP call to PSTN gateway successfully.
If ser receives "866+any PSTN num", ser will
forward to T1 trunk gateway. T1 trunkgateway will drop the prefix 866 and route
the call out to PSTN line.
i.e. SIP client (866+PSTN num) ---> T1
Trunk Gateway (drop prefix 866) ---> PSTN call (PSTN num)
SER version: ser-0.8.14
or ser-0.9.
rtpproxy version: latest cvs version from
berlios
I have posted a ser.cfg in this
email.
Best Regards,
Thomas
#
# $Id: ser.cfg,v 1.21.4.1 2003/11/10
15:35:15 andrei Exp $
#
# simple quick-start config
script
#
# ----------- global configuration parameters
------------------------
debug=3 #
debug level (cmd line: -dddddddddd)
fork=yes
log_stderror=no # (cmd
line: -E)
check_via=no # (cmd. line:
-v)
dns=no #
(cmd. line: -r)
rev_dns=no # (cmd. line:
-R)
listen=""
port=5060
#children=4
fifo_mode=0666
fifo="/tmp/ser_fifo"
# ------------------ module loading
----------------------------------
# Uncomment this if you want to use SQL
database
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/textops.so"
# Uncomment this if you want digest
authentication
# mysql.so must be loaded !
loadmodule
"/usr/local/lib/ser/modules/auth.so"
loadmodule
"/usr/local/lib/ser/modules/auth_db.so"
# Nathelper
loadmodule
"/usr/local/lib/ser/modules/nathelper.so"
# ----------------- setting
module-specific parameters ---------------
# -- 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)
# -- auth params --
# Uncomment if you are
using auth module
#
modparam("auth_db", "calculate_ha1", yes)
#
# If
you set "calculate_ha1" parameter to yes (which true in this config),
#
uncomment also the following parameter)
#
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)
# -- Nathelper params
--
modparam("registrar", "nat_flag", 6)
modparam("nathelper",
"natping_interval", 30) # Ping interval
modparam("nathelper",
"ping_nated_only", 1) # Ping only clients behind NAT
# ------------------------- 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");
break;
};
if ( msg:len > max_len )
{
sl_send_reply("513", "Message too
big");
break;
};
# Nathelper
if
(nat_uac_test("3")) {
# Allow RR-ed requests, as these may
indicate that
# a NAT-enabled proxy takes care of it; unless it
is
# a REGISTER
if (method ==
"REGISTER" || ! search("^Record-Route:")) {
log("LOG: Someone trying to register from private IP,
rewriting\n");
# This will
work only for user agents that support
symmetric
# communication. We tested quite
many of them and majority is
# smart enough to
be symmetric. In some phones it takes a
configuration
# option. With Cisco 7960, it is
called NAT_Enable=Yes, with kphone it is
#
called "symmetric media" and "symmetric signalling".
fix_nated_contact(); # Rewrite contact with source IP of
signalling
if (method == "INVITE")
{
fix_nated_sdp("1");
# Add direction=active to SDP
};
force_rport(); # Add rport parameter to
topmost Via
setflag(6); #
Mark as NATed
};
};
# 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()) {
# mark routing logic in
request
append_hf("P-hint: rr-enforced\r\n");
route(1);
break;
};
if (!uri==myself) {
#
mark routing logic in request
append_hf("P-hint: outbound\r\n");
route(1);
break;
};
# 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")
{
# Uncomment this if you want to use digest
authentication
if (!www_authorize("", "subscriber"))
{
www_challenge("",
"0");
break;
};
save("location");
break;
};
if
(uri=~"^sip:866*") {
log(1, "going to PSTN
route\n");
route(2);
break;
};
lookup("aliases");
if
(!uri==myself) {
append_hf("P-hint: outbound alias\r\n");
route(1);
break;
};
#
native SIP destinations are handled using our USRLOC DB
if
(!lookup("location")) {
sl_send_reply("404", "Not
Found");
break;
};
};
append_hf("P-hint:
usrloc applied\r\n");
route(1);
}
route[1]
{
# !!
Nathelper
if
(uri=~"[@:](192\.168\.|10\.|172\.(1[6-9]|2[0-9]|3[0-1])\.)" &&
!search("^Route:")){
sl_send_reply("479", "We don't
forward to private IP addresses");
break;
};
# if client or server know to be behind
a NAT, enable relay
if (isflagset(6)) {
force_rtp_proxy();
};
# NAT processing of replies; apply to
all transactions (for example,
# re-INVITEs from public to private UA
are hard to identify as
# NATed at the moment of request processing);
look at replies
t_on_reply("1");
# send it
out now; use stateful forwarding as it works reliably
# even for
UDP2TCP
if (!t_relay())
{
sl_reply_error();
break;
};
}
route[2]
{
force_rtp_proxy();
record_route();
t_on_reply("1");
t_relay_to_udp("T1 gateway
IP","T1 Gateway UDP port");
}
# !! Nathelper
onreply_route[1]
{
# NATed transaction ?
if
(isflagset(6) && status =~ "(183)|2[0-9][0-9]")
{
fix_nated_contact();
# Not all 2xx messages have a content
body so here we make sure
# out Content-Length > 0 to avoid a parse
error
if (!search("^Content-Length:\0"))
{
force_rtp_proxy();
};
# otherwise, is it a transaction behind a NAT and we
did not
# know at time of request processing ? (RFC1918
contacts)
} else if (nat_uac_test("1"))
{
fix_nated_contact();
};
}