Commit 3f72fbdd authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont

compat: replace recvmsg()

parent 9e3be9be
/*****************************************************************************
* recvmsg.c: POSIX recvmsg() replacement
*****************************************************************************
* Copyright © 2016 Rémi Denis-Courmont
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef _WIN32
# include <errno.h>
# include <stdlib.h>
# include <mswsock.h>
ssize_t recvmsg(int fd, struct msghdr *msg, int flags)
{
if (msg->msg_controllen != 0)
{
errno = ENOSYS;
return -1;
}
if (msg->msg_iovlen > IOV_MAX)
{
errno = EINVAL;
return -1;
}
WSABUF *buf = malloc(msg->msg_iovlen * sizeof (*buf));
if (buf == NULL)
return -1;
for (unsigned i = 0; i < msg->msg_iovlen; i++)
{
buf[i].len = msg->msg_iov[i].iov_len;
buf[i].buf = msg->msg_iov[i].iov_base;
}
DWORD dwFlags = flags;
INT fromlen = msg->msg_namelen;
DWORD rcvd;
int ret = WSARecvFrom(fd, buf, msg->msg_iovlen, &rcvd, &dwFlags,
msg->msg_name, &fromlen, NULL, NULL);
free(buf);
if (ret == 0)
{
msg->msg_namelen = fromlen;
msg->msg_flags = dwFlags;
return rcvd;
}
switch (WSAGetLastError())
{
case WSAEWOULDBLOCK:
errno = EAGAIN;
break;
}
return -1;
}
#endif
......@@ -565,7 +565,7 @@ need_libc=false
dnl Check for usual libc functions
AC_CHECK_DECLS([nanosleep],,,[#include <time.h>])
AC_CHECK_FUNCS([daemon fcntl flock fstatvfs fork getenv getpwuid_r isatty lstat memalign mkostemp mmap open_memstream openat pread posix_fadvise posix_madvise setlocale stricmp strnicmp strptime uselocale pthread_cond_timedwait_monotonic_np pthread_condattr_setclock])
AC_REPLACE_FUNCS([atof atoll dirfd fdopendir ffsll flockfile fsync getdelim getpid lldiv nrand48 poll posix_memalign rewind sendmsg setenv strcasecmp strcasestr strdup strlcpy strndup strnlen strnstr strsep strtof strtok_r strtoll swab tdestroy timegm timespec_get strverscmp])
AC_REPLACE_FUNCS([atof atoll dirfd fdopendir ffsll flockfile fsync getdelim getpid lldiv nrand48 poll posix_memalign recvmsg rewind sendmsg setenv strcasecmp strcasestr strdup strlcpy strndup strnlen strnstr strsep strtof strtok_r strtoll swab tdestroy timegm timespec_get strverscmp])
AC_CHECK_FUNCS(fdatasync,,
[AC_DEFINE(fdatasync, fsync, [Alias fdatasync() to fsync() if missing.])
])
......
......@@ -365,6 +365,11 @@ struct msghdr
};
#endif
#ifndef HAVE_RECVMSG
struct msghdr;
ssize_t recvmsg(int, struct msghdr *, int);
#endif
#ifndef HAVE_SENDMSG
struct msghdr;
ssize_t sendmsg(int, const struct msghdr *, int);
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment