Hi all. In my scenario I try to use dynamic routing and I have a problem with
the P-Asserted Identity field. When the proxy tries to send the INVITE to the
first gateway selected from DRouting module by the function do_routing, there
is only one PAI field, but if that gateway is down, at the second attempt to
next gateway, the INVITE contains two PAI fields identicals.
This is a piece of code:
########################################################################
# Request route 'base-outbound'
########################################################################
route[2] {
if(is_present_hf("P-Asserted-Identity")) {
remove_hf("P-Asserted-Identity");
}
if(is_present_hf("Remote-Party-ID")) {
remove_hf("Remote-Party-ID");
}
if(is_avp_set("$avp(s:caller_cli)/s")) {
if(!isflagset(28)) {
xlog("L_INFO", "Set caller CLI '$avp(s:caller_cli)' -
M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
append_hf("P-Asserted-Identity:
<$avp(s:caller_cli)>\r\n");
}
}
route(14);
t_on_reply("1");
if(!isflagset(21)) {
t_on_failure("1");
}
if(is_present_hf("Proxy-Authorization")) {
consume_credentials();
}
xlog("L_INFO", "Request leaving server, D-URI='$du' - M=$rm RURI=$ru
F=$fu T=$tu IP=$si ID=$ci\n");
if(!t_relay()) {
sl_reply_error();
}
exit;
}
########################################################################
# Request route 'invite-to-external'
########################################################################
route[6] {
if(isflagset(20)) {
xlog("L_INFO", "Call to foreign domain - M=$rm RURI=$ru F=$fu
T=$tu IP=$si ID=$ci\n");
route(2);
exit;
}
if(!isflagset(23)) {
# don't allow calls relaying from PSTN to PSTN, if not
explicitely forwarded
if(uri=~ "^sip:[0-9]+@") {
xlog("L_INFO", "Call to PSTN\n");
do_routing();
xlog("L_INFO", "first attempt is $ru, attributes are
$avp(s:drattrs)\n");
if(!goes_to_gw()) {
xlog("L_ERR", "No PSTN gateways available -
M=$rm RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
sl_send_reply("503", "PSTN Termination
Currently Unavailable");
exit;
}
setflag(21);
t_on_failure("2");
route(2);
exit;
}
}
xlog("L_INFO", "Call to unknown user - M=$rm RURI=$ru F=$fu T=$tu
IP=$si ID=$ci\n");
sl_send_reply("404", "User Not Found");
exit;
}
########################################################################
# Failure route 'pstn-failover'
########################################################################
failure_route[2] {
xlog("L_INFO", "Failure route for PSTN entered - M=$rm RURI=$ru F=$fu
T=$tu IP=$si ID=$ci\n");
route(9);
if(!use_next_gw()) {
xlog("L_ERR", "Failed to select next PSTN gateway - M=$rm
RURI=$ru F=$fu T=$tu IP=$si ID=$ci\n");
exit;
}
xlog("L_INFO", "selected next gateway $ru, attributes are
$avp(s:drattrs)\n");
t_on_failure("2");
route(2);
}
These are the INVITEs:
U 10.10.45.172:5060 -> 10.10.45.86:5060
INVITE sip:22230...@10.10.45.86 SIP/2.0.
Record-Route: <sip:10.10.45.172;lr=on;ftag=2061433461944847689>.
Via: SIP/2.0/UDP 10.10.45.172;branch=z9hG4bK8586.95959e37.0.
Via: SIP/2.0/UDP
10.10.45.102:1025;received=10.10.45.102;rport=1025;branch=z9hG4bK0a0a2d660000001549d9d2ae0ccb24110000004a.
Content-Length: 366.
Contact: <sip:1...@10.10.45.102:1025>.
Call-ID: b998bb4a-1dd1-11b2-8cd3-d001388a8...@10.10.45.102.
Content-Type: application/sdp.
CSeq: 2 INVITE.
From: "Sjphone laptop_User"<sip:1...@10.10.45.172>;tag=2061433461944847689.
Max-Forwards: 69.
To: <sip:30...@10.10.45.172>.
User-Agent: SJphone/1.60.299a/L (SJ Labs).
P-Asserted-Identity: <sip:003930...@10.10.45.172>.
.
v=0.
o=- 3448000814 3448000814 IN IP4 10.10.45.102.
s=SJphone.
c=IN IP4 10.10.45.102.
t=0 0.
a=direction:active.
m=audio 49154 RTP/AVP 3 97 98 110 8 0 101.
a=rtpmap:3 GSM/8000.
a=rtpmap:97 iLBC/8000.
a=rtpmap:98 iLBC/8000.
a=fmtp:98 mode=20.
a=rtpmap:110 speex/8000.
a=rtpmap:8 PCMA/8000.
a=rtpmap:0 PCMU/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-11,16.
U 10.10.45.172:5060 -> 10.10.45.227:5060
INVITE sip:22230...@10.10.45.227 SIP/2.0.
Record-Route: <sip:10.10.45.172;lr=on;ftag=2061433461944847689>.
Via: SIP/2.0/UDP 10.10.45.172;branch=z9hG4bK8586.95959e37.1.
Via: SIP/2.0/UDP
10.10.45.102:1025;received=10.10.45.102;rport=1025;branch=z9hG4bK0a0a2d660000001549d9d2ae0ccb24110000004a.
Content-Length: 366.
Contact: <sip:1...@10.10.45.102:1025>.
Call-ID: b998bb4a-1dd1-11b2-8cd3-d001388a8...@10.10.45.102.
Content-Type: application/sdp.
CSeq: 2 INVITE.
From: "Sjphone laptop_User"<sip:1...@10.10.45.172>;tag=2061433461944847689.
Max-Forwards: 69.
To: <sip:30...@10.10.45.172>.
User-Agent: SJphone/1.60.299a/L (SJ Labs).
P-Asserted-Identity: <sip:003930...@10.10.45.172>.
P-Asserted-Identity: <sip:003930...@10.10.45.172>.
.
v=0.
o=- 3448000814 3448000814 IN IP4 10.10.45.102.
s=SJphone.
c=IN IP4 10.10.45.102.
t=0 0.
a=direction:active.
m=audio 49154 RTP/AVP 3 97 98 110 8 0 101.
a=rtpmap:3 GSM/8000.
a=rtpmap:97 iLBC/8000.
a=rtpmap:98 iLBC/8000.
a=fmtp:98 mode=20.
a=rtpmap:110 speex/8000.
a=rtpmap:8 PCMA/8000.
a=rtpmap:0 PCMU/8000.
a=rtpmap:101 telephone-event/8000.
a=fmtp:101 0-11,16.
Thanks in advance.
Matteo Marzuola
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