socket_addrinfo_lookup no way to get return code

[murrant]

Description

I need to differentiate between different kinds of host lookup failures. getaddrinfo() includes the following return codes I am interested in: EAI_AGAIN, EAI_FAIL, EAI_FAMILY, EAI_NODATA, EAI_NONAME (and the others might be helpful for others)

Currently there is no way to get the return code.

My instinctual attempt to get the error was to try socket_last_error(), but this always returns 0 (Success).

I then took a look at the source code and the return code is not retained. All non-zero return codes just return false without storing the error code in any way.

In sockets.c:

if (getaddrinfo(ZSTR_VAL(hostname), service, &hints, &result) != 0) {
	RETURN_FALSE;
}

Is there any way to get the error code currently? Would new code need to be implemented to allow access to the error codes?

[devnexen]

I can see the usefulness of it. It would need a different treatment since those are not errnos, this is all.