To modify sip headers

mbylica · Posted: Fri Jul 12, 2013 8:55 am Post subject: To modify sip headers

1. Brekeke Product Name and version:
BSS, 2.4.8.6, 3.1.7.8

2. Java version:
1.6.0_25, 1.6.0_45

3. OS type and the version:
linux centos 5.5

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

5. Your problem:
Could BSS modify SIP headers that are a part of non-INVITE messages?
In other words, i would like to modify some headers in OK message that is within the sip dialog.

I tried with $request and $response but without any success.

Thanks in advance for any hint.

Beenie · Brekeke Member Joined: 28 Jul 2008 Posts: 10

Put _ in the front of the header name in DeployPatterns.
It means for a response packet.

If the header name is "Test", you need to put "_Test" in DeployPatterns.
Let you try.

mbylica · Posted: Sun Jul 14, 2013 9:16 am Post subject:

Thanks Beenie for the hint.
I have narrowed the messages down and applied the rule.

Thanks.

mbylica · Posted: Thu Aug 08, 2013 1:14 pm Post subject:

Hello,

One more question has just crossed my mind.
How can i modify some headers but only inside BYE message?
The rest of sip messages should be left unchanged.

I know that BYE is mid-session request and dialplan matched only requests which have unique Call-ID, thereby i cannot use:
request=^BYE in this case.

Is there any wayout here? (i need to strip Contact header in BYE request).

Thx in advance

ambrosio · Brekeke Master Guru Joined: 27 Mar 2008 Posts: 215

Session Plugin API can manipulate any SIP packets and any SIP headers.

mbylica · Posted: Sat Aug 10, 2013 4:37 am Post subject:

right, but following settings should work:

Matching Patterns

Call-ID = (.+)@10.10.10.5
CSeq = (.+)BYE

Deploy Patterns

_X-Test = test
$continue = true

but new header is not incorporated into BYE that is passing through BSS.

ambrosio · Brekeke Master Guru Joined: 27 Mar 2008 Posts: 215

DialPlan doesn't allow to catch PRACK, ACK, CANCEL and BYE.

Do you have any reason to modify BYE?

mbylica · Posted: Mon Aug 12, 2013 11:49 am Post subject:

Yes i need to strip Contact header there.
Some of softswitches are using this header without any reason, which is a problem in my case.

ambrosio · Brekeke Master Guru Joined: 27 Mar 2008 Posts: 215

How do you want to strip the Contact header?

mbylica · Posted: Tue Sep 03, 2013 9:03 am Post subject:

If i could catch BYE request then i may just simply remove Contact header...

Contact=

in deploy pattern