[OpenSIPS-Users] Removing Identity hdr

[Srigo Kanapathipillai]

Hi,

I'm encountering an issue with removing an Identity header in OpenSIPS 3.4. Here’s the situation:

1. An incoming call with an Identity header is received.
2. I perform a `stir_shaken_verify()` and remove the Identity header in a request route.
3. The call is forwarded to an upstream server, but it fails.
4. In the `failure_route`, I need to forward the call to a PSTN number.

5. Before sending the call to the PSTN (in compliance with French STIR/SHAKEN regulations), I need to sign it with my certificate.

However, when I call `stir_shaken_auth()`, I receive an error -2 indicating that the Identity header already exists. Despite running `remove_hf(identity)` before calling this function, the header isn't removed, and `$hdr(identity)` still returns the initial value of the Identity header.

What is the best way to remove the existing Identity header and re-sign the call?

Thank you,
Srigo
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