Charles-François Natali <[email protected]> added the comment:
I checked in glibc, FreeBSD and OpenBSD source codes, and they all define
socklen_t as an unsigned integer.
I think the confusion arises from this:
"""
The third argument of accept() was originally declared as an int * (and
is that under libc4 and libc5 and on many other systems like 4.x BSD, SunOS 4,
SGI); a POSIX.1g
draft standard wanted to change it into a size_t *, and that is what it
is for SunOS 5. Later POSIX drafts have socklen_t *, and so do the Single
Unix Specification
and glibc2.
"""
But this only implies that sizeof(socklen_t) == sizeof(int).
> since it's set by the kernel.
The only place where we compute it is in sock_sendmsg, but it would be catched
by overflow checks:
if (controllen > SOCKLEN_T_LIMIT || controllen < controllen_last) {
PyErr_SetString(socket_error, "too much ancillary data");
goto finally;
}
And we use it as malloc() and memset() argument before it's checked by
cmsg_min_space...
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