Modify Contact header FreeSWITCH

[irfanrifai]

Hello,

Does anyone know how to rewrite contact header on B leg call of freeswitch?
on bridge statement by default its contain "mod_sofia@ip.ad.dr.es". just stuck on sip_contact_host value, its still contain ip address value.
expect value looks like "Contact: <sip:12345@domain.com>"

 

[robvandenbulk]

action bridge
{sip_from_uri=sip:YOURNUMBER@PROVIDERIP<YOURNUMBER@PROVIDERIP>}sofia/gateway/a90549ff-ef8f-4472-be52-d3bde6a38768/$1

 

[andyclark05251978]

Hi I'm trying to send the name in contact field, for example Contact: "Jane Doe" <sip:3215551212@sip.example.com> right now I'm only able to send Contact: <sip:3215551212@sip.example.com>. Does anyone have a solution for this?

 

[DigitalDaz]

Why would you need to send such a contact header, what is it the reasoning?

The only purpose of the contact header is to tell the remote server how to reach you for inbound calls.

 

[andyclark05251978]

Our 911 carrier is requiring that name be in the contact header. It can't be sent using any other part of the invite, just the contact header.

 

[josue.quintana]

Our 911 carrier is requiring that name be in the contact header. It can't be sent using any other part of the invite, just the contact header.

Same problem here when trying to execute emergency calls with Skyetel.

 

[Adrian Fretwell]

The Contact header is for the benefit of the SIP devices (UAS and UAC) so they know where to send messages. It is NOT for transmitting user identity or CLI information. I would get rid of any carrier that insists on the Contact header being used in this way.

There are many other headers for transmitting identity, to name a few:
From:
Remote-Party-ID:
P-Asserted-Identity:
P-Preferred-Identity:
P-Charge-Info:
P-Source-Device:

For what your carrier is asking, it generally accepted to use the P-Asserted-Identity (PAID) header. PAID is used to transmit authenticated identity information within the “trusted” legs of SIP message transmission, i.e. between you and your carrier. This , for example, allows your carrier to process SIP messages in the context of a known, authenticated user even if the CLI has been withheld, i.e. "anonymous" in the From header.

 

[andyclark05251978]

Thank you Adrian for your suggestion but the issue is how to add contact name to the header not to get rid of any carrier. Hoping someone will be able to help with this issue

 

[Adrian Fretwell]

Thank you Adrian for your suggestion but the issue is how to add contact name to the header not to get rid of any carrier. Hoping someone will be able to help with this issue

I really would not advise anyone to look at modifying the contact header. But if you really need to do this, then you will need to look at the source code for FreeSWITCH for clues. There may be an obscure configuration method that you could use, alternatively, modify the C/C++ code in FreeSWITCH and re-compile.