[Freeswitch-dev] Same headers in a SIP message

[Kevin Mathy]

Hi List,

I faced a problem with FS, concerning SIP messages with multiple same
headers (for example, Diversion headers).
FS wasn't able to manage those headers, and only the first one was taken in
account by FS.

After some searches in mod_sofia.c, I've made a patch, giving the ability
to FS to display and manage multiple SIP Diversion headers (or other
headers)
You can find it here : http://jira.freeswitch.org/browse/FS-5411

But, I'm facing a new problem : FS is able to *read* some identical headers
and display them as "Diversion", "Diversion-1", "Diversion-2", etc... , but
it's not able to *write* some identical headers

Here is an extract of my test dialplan

<condition field="${sip_h_Diversion}"
> expression="\+(\d+).*;reason=(\w+);privacy=(\w+);counter=(\d{1})"
> break="never">
>         <action application="log" data="LOG Modifying first Diversion" />
> *        <action application="set"
> data="sip_h_Diversion=<sip:+$1>;reason=$2;privacy=$3;counter=$4" />
> * </condition>
> <condition field="${sip_h_Diversion-1}"
> expression="\+(\d+).*;reason=(\w+);privacy=(\w+);counter=(\d{1})"
> break="never">
>         <action application="log" data="LOG Modifying second Diversion-1"
> />
> *        <action application="set"
> data="sip_h_Diversion=<sip:+$1>;reason=$2;privacy=$3;counter=$4" />
> *</condition>



You can see that I'm trying to write two Diversion headers, because what
I'd like to obtain is something like that :

INVITE sip:+123456789 at fsbox.domain
> From: ....
> To : ....
> ........
> Diversion: <sip:+987654321 at domain.com
> >;reason=unavailable;privacy=off;counter=1
> Diversion: <sip:+258147369 at domain.com
> >;reason=do-not-disturb;privacy=off;counter=1


But what I really obtain is :

INVITE sip:+123456789 at fsbox.domain
> From: ....
> To : ....
> ........
> Diversion: <sip:+987654321 at domain.com
> >;reason=unavailable;privacy=off;counter=1
> *Diversion-1*: <sip:+258147369 at domain.com
> >;reason=do-not-disturb;privacy=off;counter=1


So, FS automatically write the second Diversion header with a "-1" at the
end ... And it's really frustrating !

Moreover, I don't want to use a FS function to make every SIP headers
copied automatically from A-leg to B-leg, because some of my SIP providers
don't support every header, and I have to only send essential ones.


Do you have any idea / question / answer to help me, please ?  Perhaps my
patch may be corrected, but I don't know how...

Thanks a lot,


*
Bien cordialement,
Best Regards,

**Kevin MATHY*
*
*

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