1/* Linux recvmsg syscall wrapper.
2 Copyright (C) 2016-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <sys/socket.h>
20#include <sysdep-cancel.h>
21#include <socketcall.h>
22
23static int
24__recvmsg_syscall (int fd, struct msghdr *msg, int flags)
25{
26#ifdef __ASSUME_RECVMSG_SYSCALL
27 return SYSCALL_CANCEL (recvmsg, fd, msg, flags);
28#else
29 return SOCKETCALL_CANCEL (recvmsg, fd, msg, flags);
30#endif
31}
32
33ssize_t
34__libc_recvmsg64 (int fd, struct msghdr *msg, int flags)
35{
36 ssize_t r;
37#if __TIMESIZE != 64
38 socklen_t orig_controllen = msg != NULL ? msg->msg_controllen : 0;
39#endif
40
41 r = __recvmsg_syscall (fd, msg, flags);
42
43#if __TIMESIZE != 64
44 if (r >= 0 && orig_controllen != 0)
45 __convert_scm_timestamps (msg, orig_controllen);
46#endif
47
48 return r;
49}
50#if __TIMESIZE != 64
51weak_alias (__libc_recvmsg64, __recvmsg64)
52
53ssize_t
54__libc_recvmsg (int fd, struct msghdr *msg, int flags)
55{
56 return __recvmsg_syscall (fd, msg, flags);
57}
58#endif
59weak_alias (__libc_recvmsg, recvmsg)
60weak_alias (__libc_recvmsg, __recvmsg)
61