16 Jul
2004
16 Jul
'04
9:09 p.m.
Use SER 0.8.12 stable release, enabled nathelper+rtpproxy for NAT traversal, forward
1(xxx)xxx-xxxx to SIp termiantion gateway, when the call was connected, PSTN gateway send
200 OK back, sip client ( behind NAT ) response with ACK ( which has branch value in Via
head ), but when SER forward the ACK back to PSTN gateway, in Via header it includes
branch=0, PSTN gateway refuse this ACk because it think the branch id is invalid, so call
was dropped after 30- 60 seconds, what's wrong with that? I really appreciate if you
met such problems before, thanks, and have a nice day.
Here is captured message between pstn gateway and ser:
SIP MESSAGE 4 65.22.14.3:42326(1) -> 182.156.33.10:5060(2)
UDP Frame 13 10/Jul/04 13:29:33.6715 TimeFromPreviousSipFrame=3.4065
TimeFromStart=6.3374
SIP/2.0 200 OK
Call-ID: 3164823746(a)192.168.0.102
From: <sip:2103334444@182.156.33.10;user=phone>;tag=1842950071
To: <sip:021445333321@182.156.33.10;user=phone>;tag=17810
Content-Length: 215
Content-Type: application/sdp
CSeq: 1 INVITE
Via: SIP/2.0/UDP 182.156.33.10;branch=z9hG4bK2681.4c495f05.0,SIP/2.0/UDP
192.168.0.102:5060;rport=64069;received=65.33.22.6
Contact: sip:19727925475@65.22.14.3:5060
Record-Route: <sip:021445333321@182.156.33.10;ftag=1842950071;lr=on>
SIP MESSAGE 5 182.156.33.10:5060(2) -> 65.22.14.3:42326(1)
UDP Frame 23 10/Jul/04 13:29:33.7641 TimeFromPreviousSipFrame=0.0926
TimeFromStart=6.4300
ACK sip:19727925475@65.22.14.3:42326 SIP/2.0
Max-Forwards: 10
Record-Route: <sip:021445333321@182.156.33.10;ftag=1842950071;lr=on>
Via: SIP/2.0/UDP 182.156.33.10;branch=0
Via: SIP/2.0/UDP 192.168.0.102:5060;rport=64069;received=65.33.22.6
From: <sip:2103334444@182.156.33.10;user=phone>;tag=1842950071
To: <sip:021445333321@182.156.33.10;user=phone>;tag=17810
Call-ID: 3164823746(a)192.168.0.102
CSeq: 1 ACK
User-Agent: Cisco ATA v2.15 ata18x (020927a)
Content-Length: 0
Here is the configuration file:
debug=0
fork=yes
log_stderror=yes
check_via=no # (cmd. line: -v)
dns=no # (cmd. line: -r)
rev_dns=no # (cmd. line: -R)
port=5060
children=8
listen=182.156.33.10
fifo="/tmp/ser_fifo"
loadmodule "/usr/lib/ser/modules/nathelper.so"
loadmodule "/usr/lib/ser/modules/mysql.so"
loadmodule "/usr/lib/ser/modules/sl.so"
loadmodule "/usr/lib/ser/modules/tm.so"
loadmodule "/usr/lib/ser/modules/rr.so"
loadmodule "/usr/lib/ser/modules/maxfwd.so"
loadmodule "/usr/lib/ser/modules/usrloc.so"
loadmodule "/usr/lib/ser/modules/registrar.so"
loadmodule "/usr/lib/ser/modules/textops.so"
loadmodule "/usr/lib/ser/modules/uri.so"
loadmodule "/usr/lib/ser/modules/auth.so"
loadmodule "/usr/lib/ser/modules/auth_radius.so"
loadmodule "/usr/lib/ser/modules/acc.so"
modparam("usrloc", "db_mode", 2)
modparam("usrloc", "db_mode", 2)
modparam("rr", "enable_full_lr", 1)
modparam("auth_radius", "radius_config",
"/etc/radiusclient/radiusclient.conf")
modparam("auth_radius", "service_type", 15)
modparam("acc", "service_type", 15)
modparam("acc", "radius_config",
"/etc/radiusclient/radiusclient.conf")
modparam("acc", "log_level", 2)
modparam("acc", "radius_flag", 1)
modparam("acc", "radius_missed_flag", 9)
modparam("nathelper", "natping_interval", 10)
route{
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;
};
setflag(1); /* Radius Accouting */
loose_route();
record_route();
if (search("(a)192.168.*") || search("(a)10.*") ||
search("(a)172.16.*")) {
setflag(2);
force_rport();
fix_nated_contact();
};
/* For Radius Accounting */
if (method=="INVITE") {
log(1, "INVITE: Radius Accounting\n");
setflag(1); /* Radius Accouting */
if (isflagset(2)) {
force_rtp_proxy();
};
t_on_reply("1");
};
if (method=="MESSAGE") {
log(1, "MESSAGE: Radius Accounting\n");
setflag(1); /* Radius Accouting */
};
if (method=="BYE" || method=="CANCEL") {
log (1, "BYE or CANCEL: Radius Accounting\n");
setflag(1); /* Radius Accouting */
};
if (uri==myself) {
if (method=="REGISTER") {
if (!radius_www_authorize("")) {
log(1, "REGISTER: Radius Challenging User\n");
www_challenge("", "0");
break;
};
save("location");
break;
};
lookup("aliases");
if (uri=~"sip:1[0-9][0-9][0-9]*@.*") {
t_relay_to_udp("65.22.14.3", "5060");
break;
};
# native SIP destinations are handled using our USRLOC DB
if (!lookup("location")) {
sl_send_reply("404", "Not Found");
break;
};
};
setflag(1);
if (!t_relay()) {
sl_reply_error();
};
}
onreply_route[1] {
if ( ((status=~"2[0-9][0-9]")||(status=~"183")) &&
(search("192.168.*") || search("(a)10.*") ||
search("172.16.*") )) {
fix_nated_contact();
force_rtp_proxy();
};
}
--
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