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/* recvfrom.c --- wrappers for Windows recvfrom function
Copyright (C) 2008-2021 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Paolo Bonzini */
#include <config.h>
#define WIN32_LEAN_AND_MEAN
/* Get winsock2.h. */
#include <sys/socket.h>
/* Get set_winsock_errno, FD_TO_SOCKET etc. */
#include "w32sock.h"
#undef recvfrom
ssize_t
rpl_recvfrom (int fd, void *buf, size_t len, int flags, struct sockaddr *from,
socklen_t *fromlen)
{
SOCKET sock = FD_TO_SOCKET (fd);
if (sock == INVALID_SOCKET)
{
errno = EBADF;
return -1;
}
else
{
int frombufsize = (from != NULL ? *fromlen : 0);
int r = recvfrom (sock, buf, len, flags, from, fromlen);
if (r < 0)
set_winsock_errno ();
/* Winsock recvfrom() only returns a valid 'from' when the socket is
connectionless. POSIX gives a valid 'from' for all types of
sockets. */
else if (from != NULL && *fromlen == frombufsize)
rpl_getpeername (fd, from, fromlen);
return r;
}
}
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