1/*
2 * Copyright (c) 2015-2016 Dmitry V. Levin <ldv@altlinux.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include "tests.h"
29
30#include <assert.h>
31#include <errno.h>
32#include <string.h>
33#include <unistd.h>
34#include <sys/socket.h>
35#include <asm/unistd.h>
36
37#ifndef __NR_send
38# define __NR_send -1
39#endif
40#define SC_send 9
41
42#ifndef __NR_recv
43# define __NR_recv -1
44#endif
45#define SC_recv 10
46
47static int
48sys_send(int sockfd, const void *buf, size_t len, int flags)
49{
50	int rc = socketcall(__NR_send, SC_send,
51			    sockfd, (long) buf, len, flags, 0);
52	if (rc < 0 && ENOSYS == errno)
53		perror_msg_and_skip("send");
54	return rc;
55}
56
57static int
58sys_recv(int sockfd, const void *buf, size_t len, int flags)
59{
60	int rc = socketcall(__NR_recv, SC_recv,
61			    sockfd, (long) buf, len, flags, 0);
62	if (rc < 0 && ENOSYS == errno)
63		perror_msg_and_skip("recv");
64	return rc;
65}
66
67static void
68transpose(char *str, const size_t len)
69{
70	size_t i;
71
72	for (i = 0; i < len / 2; ++i) {
73		char c = str[i];
74		str[i] = str[len - 1 - i];
75		str[len - 1 - i] = c;
76	}
77}
78
79int
80main(int ac, char **av)
81{
82	assert(ac == 2);
83	const size_t len = strlen(av[1]);
84	assert(len);
85	char *const buf0 = tail_alloc(len);
86	char *const buf1 = tail_alloc(len);
87	memcpy(buf0, av[1], len);
88
89	(void) close(0);
90	(void) close(1);
91
92	int sv[2];
93	if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv))
94		perror_msg_and_skip("socketpair");
95
96	assert(sys_send(0, buf0, len, MSG_DONTROUTE) == (int) len);
97	assert(sys_recv(1, buf1, len, MSG_WAITALL) == (int) len);
98
99	transpose(buf1, len);
100	assert(sys_send(1, buf1, len, MSG_DONTROUTE) == (int) len);
101	if (close(1))
102		perror_msg_and_fail("close(1)");
103
104	assert(sys_recv(0, buf0, len, MSG_WAITALL) == (int) len);
105	if (close(0))
106		perror_msg_and_fail("close(0)");
107	assert(sys_recv(0, NULL, len, MSG_DONTWAIT) == -1);
108
109	return 0;
110}
111