[SR-Users] Strange behavior when rewriting "To" header from failure_route (kamailio - 3.0.2)

[Kosilov Fedor]

piece of code:

........

failure_route[2] {

if (!t_is_canceled()) {
 revert_uri();
sql_query("main", "select username from subscriber where alias='$tU' and
alias_seq='2'", "alias_name");
 sql_query("main", "select domain from subscriber where alias='$tU' and
alias_seq='2'", "alias_domain");

subst_uri('/^sip:.*@.*$/sip:$dbr(alias_name=>[0,0])@$dbr(alias_domain=>[0,0])/');
subst('/^To:.*<sip:.*>/To:
<sip:$dbr(alias_name=>[0,0])@$dbr(alias_domain=>[0,0])>\r/');  #<-----THIS
ONE DOESN'T WORK PROPERLY
 sql_result_free("alias_name");
sql_result_free("alias_domain");
 setflag(10);

if (!lookup("location")) {
  switch ($retcode) {
case -1:
case -3:
 t_reply("404", "Not Found");
exit;
case -2:
 exit;
  }
}
 append_branch();

route(5);
}

}

route[5] {
if (!t_relay()) {
sl_reply_error();
 }
exit;
}


And with ngrep i can see:

#
U 10.10.10.10.:5060 -> 10.10.10.15:53286
INVITE sip:ncm0000a at 10.20.5.72:5060 SIP/2.0.
Record-Route: <sip:10.10.10.10;lr=on;ftag=D1D33F74-16CA;nat=yes>.
Via: SIP/2.0/UDP 10.10.10.10;branch=z9hG4bKc1ce.a89602e5.1.
Via: SIP/2.0/UDP 10.20.5.10:5060;rport=57078;branch=z9hG4bK6F2A7E0.
Remote-Party-ID: <sip:85559955500 at 10.20.5.10 <sip%3A85559955500 at 10.20.5.10>
>;party=calling;screen=yes;privacy=off.
From: <sip:9955500 at 10.20.5.10 <sip%3A9955500 at 10.20.5.10>>;tag=D1D33F74-16CA.
To: <sip:ncm0000b at domain.com <sip%3Ancm0000b at domain.com>>.To: <
sip:ncm0000a at domain.com <sip%3Ancm0000a at domain.com>>.
                   <---------------DUPLICATE HEADERS
Date: Tue, 08 Jun 2010 06:39:41 GMT.
Call-ID: 73CF85D3-71FF11DF-B5C1D8D5-9276F617 at 10.20.5.10.
Supported: 100rel,timer,resource-priority,replaces.
Min-SE:  1800.
Cisco-Guid: 1942740043-1912541663-2892365836-2242214896.
User-Agent: Cisco-SIPGateway/IOS-12.x.
Accept-Language: ru.
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE,
NOTIFY, INFO, REGISTER.
CSeq: 101 INVITE.
Max-Forwards: 69.
Timestamp: 1275979181.
Contact: <sip:85559955500 at 10.20.5.10:57078>.
Expires: 180.
Allow-Events: telephone-event.
Content-Type: application/sdp.
Content-Disposition: session;handling=required.
Content-Length: 401.
...............

I'm trying to rewrite this one:  To:
<sip:ncm0000b at domain.com<sip%3Ancm0000b at domain.com>
>.
with this one:                           To:
<sip:ncm0000a at domain.com<sip%3Ancm0000a at domain.com>>.



I'm a newbie, so, please, show me where is my mistake.


Sincerely yours,
Kosilov Fedor.
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