2 * Wrappers for recvmmsg and sendmmsg syscalls.
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
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15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
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32 #include <asm/unistd.h>
35 # define __NR_recvmmsg -1
37 #define SC_recvmmsg 19
40 # define __NR_sendmmsg -1
42 #define SC_sendmmsg 20
45 recv_mmsg(const int fd, struct mmsghdr *const vec,
46 const unsigned int vlen, const unsigned int flags,
47 struct timespec *const timeout)
49 int rc = socketcall(__NR_recvmmsg, SC_recvmmsg,
50 fd, (long) vec, vlen, flags, (long) timeout);
52 if (rc < 0 && ENOSYS == errno)
53 perror_msg_and_skip("recvmmsg");
59 send_mmsg(const int fd, struct mmsghdr *const vec,
60 const unsigned int vlen, const unsigned int flags)
62 int rc = socketcall(__NR_sendmmsg, SC_sendmmsg,
63 fd, (long) vec, vlen, flags, 0);
65 if (rc < 0 && ENOSYS == errno)
66 perror_msg_and_skip("sendmmsg");