300 Multiple Choices; source number modification

[PiotrOS]

1. Brekeke Product Name and version: Brekeke SIP Server

2. Java version: 1.6.0_45

3. OS type and the version: Linux centos 6.6

4. UA (phone), gateway or other hardware/software involved: doesn't matter

5. Select your network pattern from http://www.brekeke-sip.com/bbs/network/networkpatterns.html : Pattern 9

6. Your problem:

Right now BSS takes src number from INVITE, and I would like to know if BSS can take src number from 300 Multiple choices?
I would like to know possibility of parsing extra information in field "contact" by Brekeke switch.

Example how it looks like:

BSS sends:
INVITE sip:998906179545@xx.xx.xx.xx SIP/2.0
Via: SIP/2.0/UDP xx.xx.xx.xx:5060;rport;branch=z9hG4bK5808fdc16fd414-30-8202a4d5
Via: SIP/2.0/UDP xx.xx.xx.xx:5060;branch=z9hG4bK1522972f;rport=5060
From: "35542233273" <sip:35542233273@xx.xx.xx.xx>;tag=as3c624940
To: <sip:998906179545@xx.xx.xx.xx>
Contact: <sip:35542233273@xx.xx.xx.xx:5060>
Call-ID: 1111786e52b3101b46b6dd823fb284fd@xx.xx.xx.xx
CSeq: 102 INVITE
User-Agent: Enable Softswitch v.1.1
Max-Forwards: 69
Remote-Party-ID: "35542233273" <sip:35542233273@xx.xx.xx.xx>;privacy=off;screen=no
Date: Thu, 28 Aug 2013 14:32:21 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
Supported: replaces
Record-Route: <sip:xx.xx.xx.xx:5060;lr>
Content-Type: application/sdp
Content-Length: 255

Get answer:
SIP/2.0 300 Multiple Choices
Via: SIP/2.0/UDP xx.xx.xx.xx;rport;branch=z9hG4bKNrva1QjcmUD8B
From: "New User" <sip:35542233273@xx.xx.xx.xx>;tag=H95FN3850egQF
To: <sip:998906179545@xx.xx.xx.xx:5062>
Contact: <sip:998906179545@xx.xx.xx.xx>;src_number=135542233273;q=1.00
Call-ID: 1111786e52b3101b46b6dd823fb284fd@xx.xx.xx.xx
CSeq: 70588150 INVITE
Max-Forwards: 69
Content-Length: 0


As you see in field "Contact: <sip:998906179545@xx.xx.xx.xx>;src_number=135542233273;q=1.00" we add extra field of src_number.
And the question is can Brekeke SIP Server parse field Contact with extra expression and modify Src number before it’s send to the provider?


Thanks in advance for any hint.

[Harold]

Is it based on any specification such as RFC?

If you want to get "src_number" from "300", you may need to write a session plugin for parsing packets.