We have an internal component of our callflow that does not support compact headers (vendor says it's on the roadmap but no eta, etc) so I'm trying to find a clean way to detect if a message has compact headers and reject it. I haven't had much luck in finding a way to identify specifically if any of the headers of the message are compact however. Can anyone point me in a direction please?
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Are some of the core SIP headers and others not? If they’re pretty consistent, checking for a single one like “i” for Call-ID is a safe bet.
— Sent from mobile, with due apologies for brevity and errors.
On Dec 6, 2021, at 12:43 PM, Brooks Bridges bbridges@call48.com wrote:
We have an internal component of our callflow that does not support compact headers (vendor says it's on the roadmap but no eta, etc) so I'm trying to find a clean way to detect if a message has compact headers and reject it. I haven't had much luck in finding a way to identify specifically if any of the headers of the message are compact however. Can anyone point me in a direction please?
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It appears that it's just the "major" ones, From, To, Call-ID, etc. Where I'm running into the issue is actually detecting the header being "i:" instead of "Call-ID:" as pretty much everything I've found for parsing that data is based on the content not the header name itself.
-----Original Message----- From: sr-users sr-users-bounces@lists.kamailio.org On Behalf Of Alex Balashov Sent: Monday, December 6, 2021 9:49 AM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: Re: [SR-Users] detecting compact headers?
Are some of the core SIP headers and others not? If they’re pretty consistent, checking for a single one like “i” for Call-ID is a safe bet.
— Sent from mobile, with due apologies for brevity and errors.
On Dec 6, 2021, at 12:43 PM, Brooks Bridges bbridges@call48.com wrote:
We have an internal component of our callflow that does not support compact headers (vendor says it's on the roadmap but no eta, etc) so I'm trying to find a clean way to detect if a message has compact headers and reject it. I haven't had much luck in finding a way to identify specifically if any of the headers of the message are compact however. Can anyone point me in a direction please?
Thanks! Confidentiality Notice: This e-mail, and any attachment to it, contains privileged and confidential information intended only for the use of the individual(s) or entity named on the e-mail. If the reader of this e-mail is not the intended recipient, or the employee or agent responsible for delivering it to the intended recipient, you are hereby notified that reading this e-mail is strictly prohibited. If you have received this e-mail in error, please immediately return it to the sender and delete it from your system.
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Hello,
there might be a more elegant way, but one idea would be to use one of the regular expression matches from textops (search(..)) to look for the compact header names.
It would be probably a good idea to add a transformation to output the type of the header.
Cheers,
Henning
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Alex Balashov -
Brooks Bridges -
Henning Westerholt