AGI:解析 SIP Header

解析 SIP Header 的 Diversion 欄位內容

Dialplan：

[my-sip-header-filter]
exten => s,1,NoOp( Incoming calls from internet )
exten => s,n,NoOp(SIP_HEADER From field: ${SIP_HEADER(From,1)})
exten => s,n,NoOp(SIP_HEADER To field: ${SIP_HEADER(To,1)})
; for debug only
exten => s,n,GotoIf($[${LEN(${SIP_HEADER(Diversion,1)})} > 0]?next:next)
;exten => s,n,GotoIf($[${LEN(${SIP_HEADER(Diversion,1)})} > 0]?next)
exten => s,n,NoOp(SIP_HEADER Diversion field: <Data Not Found>)
exten => s,n,Hangup
exten => s,n(next),NoOp(SIP_HEADER Diversion field: ${SIP_HEADER(Diversion,1)})
exten => s,n,Set(STR=${SIP_HEADER(Diversion,1)})
exten => s,n,NoOp(STR: ${STR})
exten => s,n,AGI(get_diverter.php,${STR})
exten => s,n,NoOp(Diverter: ${DIVERTER})
exten => s,n,Hangup

get_diverter.php：

#!/usr/bin/php -q
<?php
include(dirname(__FILE__)."/phpagi.php");

$AGI = new AGI();

// for debug only
$argv[1] = '<sip:358505735791@voxbone.com>;counter=1;reason=unknown';

if (!isset($argv[1])) {
        $AGI->verbose('Missing STR info');
        exit(1);
}

$STRING = $argv[1];

preg_match('#<sip:(?P<number>[0-9]+)@(.*)>#',$STRING,$MATCHES);

//print_r($MATCHES);
$NUMBER = $MATCHES["number"];
$AGI->verbose("DIVERTER: $NUMBER");

// Return to Dialplan
$AGI->set_variable("DIVERTER",$NUMBER);

?>