[VoiceOps] full to compact header conversion

[Brandon Buckner]

Hmm, I don't know if there's a way to not have the Acme SBC convert "f:" to "From" when it actually sends the message. I wrote a HMR to store the value of From:, then delete it, then add a header of "f" then add the stored value to an INVITE heading out to one of my carriers on my lab system. A wireshark capture indeed shows the from being deleted and re-added to the bottom, but it lists as "From" instead of "f", even in the converted hex frame in the bottom wireshark window. I know there someone from Acme on here, perhaps they can shed some light on it? Here's what I came up with (I only used invite in my test but that's easily changed to any): 

sip-manipulation
        name                           CompactHeaders
        description                    
        header-rule
                name                           StoreFrom
                header-name                    From
                action                         store
                comparison-type                pattern-rule
                match-value                    .*
                msg-type                       request
                new-value                      
                methods                        INVITE
        header-rule
                name                           DeleteFrom
                header-name                    From
                action                         delete
                comparison-type                case-sensitive
                match-value                    
                msg-type                       request
                new-value                      
                methods                        INVITE
        header-rule
                name                           AddF
                header-name                    f
                action                         add
                comparison-type                case-sensitive
                match-value                    
                msg-type                       request
                new-value                      $StoreFrom.$0
                methods                        INVITE


On a different tack, are you perhaps able to strip some extraneous information from the headers that the carrier doesn't need or even in the SDP such as unused codecs? 

----
Brandon Buckner
Switching Technician / VoIP Admin
Iowa Network Services
brandonb at netins.com
________________________________________
From: voiceops-bounces at voiceops.org [voiceops-bounces at voiceops.org] On Behalf Of David Hiers [hiersd at gmail.com]
Sent: Thursday, November 05, 2009 11:17 AM
To: Scott Berkman
Cc: VoiceOps at voiceops.org
Subject: Re: [VoiceOps] full to compact header conversion

Yep, acme is the first place I'm looking.  It'd be nice to use their
ability to store the value in the From: header, delete the entire
From: header, then write the stored value in a newly-created f:
header.

David



On Thu, Nov 5, 2009 at 8:31 AM, Scott Berkman <scott at sberkman.net> wrote:
> Acme can strip headers, and so can SER/Variants.  Also if you are
> specifically talking about SIP messages coming out from Broadsoft towards
> the PSTN, there are some options in the AS SIP Interface CLI settings about
> sending diversion headers and the different versions of PAID (privacy mode I
> think?) that can help you shorten the headers.
>
>        -Scott
>
> -----Original Message-----
> From: voiceops-bounces at voiceops.org [mailto:voiceops-bounces at voiceops.org]
> On Behalf Of David Hiers
> Sent: Thursday, November 05, 2009 9:44 AM
> To: VoiceOps at voiceops.org
> Subject: [VoiceOps] full to compact header conversion
>
> Anyone seen a slick way to convert headers from full to compact?
>
> After a bunch of diversions, we get close to the PMTU.
>
> Thanks,
>
> David
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> VoiceOps at voiceops.org
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>
>
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