Error reporting in re

[rkd-msw]

In my re application, I've just been tracking down an ETIMEDOUT error - which I wrongly assumed was a TCP connection timeout, until I realised it actually represented a SIP transaction timeout (from https://github.com/creytiv/re/blob/master/src/sip/ctrans.c#L174).

I'd like to make this easier to diagnose, including viewing the Call-ID etc. of the message I tried to send, but I'm not sure how:

• some kind of logging callback infrastructure, so I can register an error log handler with re?
• just printing the error to stderr?
• using the DEBUG_WARNING macro?
• implementing re-specific error codes, and an re_strerror, so I can return E_RE_SIPCXNTIMEOUT instead of ETIMEDOUT?

[alfredh]

thanks for your comment

the logging in libre is a bit mixed; some modules are using DEBUG_XXX macros,
some modules are using printing to stderr, some module have no logging.

the most practical is to use DEBUG_XXX which has a callback handler
to the application for log messages.

adding re-specific error codes is possible, since we are using the
format specified %m for errno-types of error codes.

e.g.: re_printf("%m\n", EINVAL);

Alfred