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/* Copyright (C) 2015-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library 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.
The GNU C Library 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 the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <sys/socket.h>
#include <time.h>
#include <sysdep.h>
#include <socketcall.h>
#include <socket-constants-time64.h>
static int
getsockopt_syscall (int fd, int level, int optname, void *optval,
socklen_t *len)
{
#ifdef __ASSUME_GETSOCKOPT_SYSCALL
return INLINE_SYSCALL (getsockopt, 5, fd, level, optname, optval, len);
#else
return SOCKETCALL (getsockopt, fd, level, optname, optval, len);
#endif
}
#ifndef __ASSUME_TIME64_SYSCALLS
static int
getsockopt32 (int fd, int level, int optname, void *optval,
socklen_t *len)
{
int r = -1;
if (level != SOL_SOCKET)
return r;
switch (optname)
{
case COMPAT_SO_RCVTIMEO_NEW:
case COMPAT_SO_SNDTIMEO_NEW:
{
if (optname == COMPAT_SO_RCVTIMEO_NEW)
optname = COMPAT_SO_RCVTIMEO_OLD;
if (optname == COMPAT_SO_SNDTIMEO_NEW)
optname = COMPAT_SO_SNDTIMEO_OLD;
struct __timeval32 tv32;
r = getsockopt_syscall (fd, level, optname, &tv32,
(socklen_t[]) { sizeof tv32 });
if (r < 0)
break;
/* POSIX states that if the size of the option value is greater than
then option length, the option value argument shall be silently
truncated. */
if (*len >= sizeof (struct __timeval64))
{
struct __timeval64 *tv64 = (struct __timeval64 *) optval;
*tv64 = valid_timeval32_to_timeval64 (tv32);
*len = sizeof (*tv64);
}
else
memcpy (optval, &tv32, sizeof tv32);
}
break;
case COMPAT_SO_TIMESTAMP_NEW:
case COMPAT_SO_TIMESTAMPNS_NEW:
{
if (optname == COMPAT_SO_TIMESTAMP_NEW)
optname = COMPAT_SO_TIMESTAMP_OLD;
if (optname == COMPAT_SO_TIMESTAMPNS_NEW)
optname = COMPAT_SO_TIMESTAMPNS_OLD;
r = getsockopt_syscall (fd, level, optname, optval, len);
}
break;
}
return r;
}
#endif
int
__getsockopt (int fd, int level, int optname, void *optval, socklen_t *len)
{
int r = getsockopt_syscall (fd, level, optname, optval, len);
#ifndef __ASSUME_TIME64_SYSCALLS
if (r == -1 && errno == ENOPROTOOPT)
r = getsockopt32 (fd, level, optname, optval, len);
#endif
return r;
}
weak_alias (__getsockopt, getsockopt)
#if __TIMESIZE != 64
weak_alias (__getsockopt, __getsockopt64)
#endif
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