neels has posted comments on this change. ( 
https://gerrit.osmocom.org/c/osmo-mgw/+/34900?usp=email )

Change subject: add fmtp string to ptmap: allow all possible fmtp
......................................................................


Patch Set 3:

(3 comments)

File include/osmocom/mgcp/mgcp_network.h:

https://gerrit.osmocom.org/c/osmo-mgw/+/34900/comment/26f6967e_d57f2eb6
PS3, Line 90:   char fmtp[256];
> here is that char fmtp[256], it matches the storage choice of audio_name[] 
> above.
context: this is used in public API, also as out-parameter. Dynamic allocation 
would be tricky, so leave it static.


File include/osmocom/mgcp_client/mgcp_client.h:

https://gerrit.osmocom.org/c/osmo-mgw/+/34900/comment/ae818ca6_8024f899
PS3, Line 84:   const char *fmtp;
> I'm a bit wobbly on the storage choice. Elsewhere I put a char fmtp[256]. […]
context:
structs with ptmap members are:
- struct mgcp_conn_peer
- struct mgcp_response

If a fmtp is only passed in as function arg, it is fine to be a static pointer 
that goes bust after the function returns.
For persistent storage, a pointer going bust would be bad.
So are any of these structs persistent?

mgcp_conn_peer is stored persistently in at least mgcp_client_endpoint_fsm.c.

It copies a value passed in from a caller outside of this library.

So indeed a static array would be safer / simpler here.


File src/libosmo-mgcp/mgcp_sdp.c:

https://gerrit.osmocom.org/c/osmo-mgw/+/34900/comment/8333a45b_d2dc732c
PS3, Line 59:   const char *fmtp;
> here's another dynamic string...
context: this struct is used only internally in this .c file.
The storage is never persistent, always limited in a function scope.
There already is a bunch of talloc allocation with a temporary ctx, so this is 
fine to remain a pointer (and not impose a length limit).



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Gerrit-Project: osmo-mgw
Gerrit-Branch: master
Gerrit-Change-Id: If58590bda8627519ff07e0b6f43aa47a274f052b
Gerrit-Change-Number: 34900
Gerrit-PatchSet: 3
Gerrit-Owner: neels <[email protected]>
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Gerrit-Comment-Date: Thu, 26 Oct 2023 23:26:26 +0000
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