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User who did this - Hugh James (hugh.james)
Attached to Project - sip-router
Summary - force_send_socket() doesnt set the source IP address reliably when
using uac_req_send()
Task Type - Bug Report
Category - Core
Status - Unconfirmed
Assigned To -
Operating System - Linux
Severity - Medium
Priority - Normal
Reported Version - 4.0
Due in Version - Undecided
Due Date - Undecided
Details - I'm having an issue with force_send_socket(). I have a server with
two interfaces on separate sub-nets 192.168.60.xx and 192.168.70.xx , and
running Kamailio as a proxy with SIP messaging coming in/out over both
interfaces.
I have a second Kamailio running on a second IP (192.168.60.101) address and
need to send a custom method between the two instances from time to time.
The custom message has to go from 192.168.60.102 to 192.168.60.101 when a
200-OK to an INVITE arrives and at other similar points in the call.
I'm using the following lines in my configuration script , but it works
sometimes and not at other times. Sometimes the message is sent to
192.168.60.101 from 192.168.70.102 (which is the wrong interface) , and
therefore doesn't reach the second Kamailio server. It appears as though the
message is always sent out on the interface the last message was received on
even though I use force_send_socket() to try and set the source IP address for
the message
Have I misunderstood the purpose of this function? is there some other way of
sending an internally generated message from a specific IP address/interface
I have attached an example wireshark trace showing this behavior
force_send_socket(192.168.60.102:5060);
$uac_req(method)="CUSTOMMETHOD";
$uac_req(ruri)="sip:" + "192.168.60.101" ;
$uac_req(furi)="sip:" + "192.168.60.102" ;
$uac_req(turi)="sip:" + 192.168.60.101 ;
$uac_req(ouri)="sip:" + 192.168.60.101 ;
$uac_req(hdrs)="CSeq: 22 CUSTOMMETHOD\r\n";
$uac_req(hdrs)="Content-Type: text/custom\r\n";
$var(cseqbody) = $var(MessageType)+"?" \
+$ci+"?" \
+$CCM_x1+"?" \
+$CCM_x2+"?" \
+$CCM_x3+"?" \
+$CCM_x4+"?" \
+$CCM_x5+"?" \
+$CCM_x6+"?";
$uac_req(body)= $var(cseqbody);
uac_req_send();
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http://sip-router.org/tracker/index.php?do=details&task_id=294
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