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1 /*
2  * Wrappers for recvmmsg and sendmmsg syscalls.
3  *
4  * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
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
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
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.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  */
29 
30 #include "tests.h"
31 #include <errno.h>
32 #include <asm/unistd.h>
33 
34 #ifndef __NR_recvmmsg
35 # define __NR_recvmmsg -1
36 #endif
37 #define SC_recvmmsg 19
38 
39 #ifndef __NR_sendmmsg
40 # define __NR_sendmmsg -1
41 #endif
42 #define SC_sendmmsg 20
43 
44 int
recv_mmsg(const int fd,struct mmsghdr * const vec,const unsigned int vlen,const unsigned int flags,struct timespec * const timeout)45 recv_mmsg(const int fd, struct mmsghdr *const vec,
46 	  const unsigned int vlen, const unsigned int flags,
47 	  struct timespec *const timeout)
48 {
49 	int rc = socketcall(__NR_recvmmsg, SC_recvmmsg,
50 			    fd, (long) vec, vlen, flags, (long) timeout);
51 
52 	if (rc < 0 && ENOSYS == errno)
53 		perror_msg_and_skip("recvmmsg");
54 
55 	return rc;
56 }
57 
58 int
send_mmsg(const int fd,struct mmsghdr * const vec,const unsigned int vlen,const unsigned int flags)59 send_mmsg(const int fd, struct mmsghdr *const vec,
60 	  const unsigned int vlen, const unsigned int flags)
61 {
62 	int rc = socketcall(__NR_sendmmsg, SC_sendmmsg,
63 			    fd, (long) vec, vlen, flags, 0);
64 
65 	if (rc < 0 && ENOSYS == errno)
66 		perror_msg_and_skip("sendmmsg");
67 
68 	return rc;
69 }
70