1 /* Copyright (C) 2010-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <sys/socket.h>
19 #include <sysdep.h>
20 #include <socketcall.h>
21
22 int
__recvmmsg64(int fd,struct mmsghdr * vmessages,unsigned int vlen,int flags,struct __timespec64 * timeout)23 __recvmmsg64 (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags,
24 struct __timespec64 *timeout)
25 {
26 #ifndef __NR_recvmmsg_time64
27 # define __NR_recvmmsg_time64 __NR_recvmmsg
28 #endif
29 int r = SYSCALL_CANCEL (recvmmsg_time64, fd, vmessages, vlen, flags,
30 timeout);
31 #ifndef __ASSUME_TIME64_SYSCALLS
32 if (r >= 0 || errno != ENOSYS)
33 return r;
34
35 struct timespec ts32, *pts32 = NULL;
36 if (timeout != NULL)
37 {
38 if (! in_time_t_range (timeout->tv_sec))
39 {
40 __set_errno (EINVAL);
41 return -1;
42 }
43 ts32 = valid_timespec64_to_timespec (*timeout);
44 pts32 = &ts32;
45 }
46
47 socklen_t csize[IOV_MAX];
48 if (vlen > IOV_MAX)
49 vlen = IOV_MAX;
50 for (int i = 0; i < vlen; i++)
51 csize[i] = vmessages[i].msg_hdr.msg_controllen;
52
53 # ifdef __ASSUME_RECVMMSG_SYSCALL
54 r = SYSCALL_CANCEL (recvmmsg, fd, vmessages, vlen, flags, pts32);
55 # else
56 r = SOCKETCALL_CANCEL (recvmmsg, fd, vmessages, vlen, flags, pts32);
57 # endif
58 if (r >= 0)
59 {
60 if (timeout != NULL)
61 *timeout = valid_timespec_to_timespec64 (ts32);
62
63 for (int i=0; i < r; i++)
64 __convert_scm_timestamps (&vmessages[i].msg_hdr, csize[i]);
65 }
66 #endif /* __ASSUME_TIME64_SYSCALLS */
67 return r;
68 }
69 #if __TIMESIZE != 64
libc_hidden_def(__recvmmsg64)70 libc_hidden_def (__recvmmsg64)
71
72 int
73 __recvmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags,
74 struct timespec *timeout)
75 {
76 struct __timespec64 ts64, *pts64 = NULL;
77 if (timeout != NULL)
78 {
79 ts64 = valid_timespec_to_timespec64 (*timeout);
80 pts64 = &ts64;
81 }
82 int r = __recvmmsg64 (fd, vmessages, vlen, flags, pts64);
83 if (r >= 0 && timeout != NULL)
84 /* The remanining timeout will be always less the input TIMEOUT. */
85 *timeout = valid_timespec64_to_timespec (ts64);
86 return r;
87 }
88 #endif
89 weak_alias (__recvmmsg, recvmmsg)
90