add optional sip call-id

[eschmidbauer]

No description provided.

[ibc]

Call-Id value is something internal at SIP protocol level. There is no reason for letting the user application choose it.

[eschmidbauer]

there is benefit from letting the user customize it. For example setting a matching call-id in REGISTER to connect a suspended INVITE with same call-id.
This change is backward compatible and RFC compliant.

[ibc]

For example setting a matching call-id in REGISTER to connect a suspended INVITE with same call-id.

I don't know what that is and I've never seen anything about that in any SIP RFC specification.

[eschmidbauer]

https://datatracker.ietf.org/doc/html/rfc3261#section-8.1.1.4
Use of cryptographically random identifiers (RFC 1750 [12]) in the
generation of Call-IDs is RECOMMENDED. Implementations MAY use the
form "localid@host". Call-IDs are case-sensitive and are simply
compared byte-by-byte.

it says "...generation of Call-IDs is RECOMMENDED." therefore it is not illegal to have the call-id customized

[eschmidbauer]

it is also beneficial for users to set the call-id for logging/tracing purposes.