1/*
2 * Check decoding and dumping of sendto and recvfrom syscalls.
3 *
4 * Copyright (c) 2015-2016 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 <assert.h>
32#include <string.h>
33#include <unistd.h>
34#include <sys/socket.h>
35#include <sys/wait.h>
36
37static void
38transpose(char *str, int len)
39{
40	int i;
41
42	for (i = 0; i < len / 2; ++i) {
43		char c = str[i];
44		str[i] = str[len - 1 - i];
45		str[len - 1 - i] = c;
46	}
47}
48
49int
50main(int ac, char **av)
51{
52	assert(ac == 2);
53	const int len = strlen(av[1]);
54	assert(len);
55
56	(void) close(0);
57	(void) close(1);
58
59	int sv[2];
60	if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv))
61		perror_msg_and_skip("socketpair");
62
63	pid_t pid = fork();
64	if (pid < 0)
65		perror_msg_and_fail("fork");
66
67	if (pid) {
68		assert(close(1) == 0);
69		transpose(av[1], len);
70		assert(sendto(0, av[1], len, MSG_DONTROUTE, NULL, 0) == len);
71		assert(recvfrom(0, av[1], len, MSG_WAITALL, NULL, NULL) == len);
72		assert(close(0) == 0);
73
74		int status;
75		assert(waitpid(pid, &status, 0) == pid);
76		assert(status == 0);
77	} else {
78		assert(close(0) == 0);
79		assert(recvfrom(1, av[1], len, MSG_WAITALL, NULL, NULL) == len);
80		transpose(av[1], len);
81		assert(sendto(1, av[1], len, MSG_DONTROUTE, NULL, 0) == len);
82		assert(recvfrom(1, av[1], len, MSG_WAITALL, NULL, NULL) == 0);
83		assert(close(1) == 0);
84	}
85
86	return 0;
87}
88