1 /*
2 * Check decoding of SO_LINGER socket option.
3 *
4 * Copyright (c) 2017 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
32 #include <stdio.h>
33 #include <sys/socket.h>
34 #include <unistd.h>
35
36 static const char *errstr;
37
38 static int
get_linger(int fd,void * val,socklen_t * len)39 get_linger(int fd, void *val, socklen_t *len)
40 {
41 int rc = getsockopt(fd, SOL_SOCKET, SO_LINGER, val, len);
42 errstr = sprintrc(rc);
43 return rc;
44 }
45
46 static int
set_linger(int fd,void * val,socklen_t len)47 set_linger(int fd, void *val, socklen_t len)
48 {
49 int rc = setsockopt(fd, SOL_SOCKET, SO_LINGER, val, len);
50 errstr = sprintrc(rc);
51 return rc;
52 }
53
54 int
main(void)55 main(void)
56 {
57 TAIL_ALLOC_OBJECT_CONST_PTR(struct linger, linger);
58 TAIL_ALLOC_OBJECT_CONST_PTR(socklen_t, len);
59 int fd = socket(AF_UNIX, SOCK_STREAM, 0);
60 if (fd < 0)
61 perror_msg_and_skip("socket AF_UNIX SOCK_STREAM");
62
63 /* classic getsockopt */
64 *len = sizeof(*linger);
65 get_linger(fd, linger, len);
66 printf("getsockopt(%d, SOL_SOCKET, SO_LINGER, {l_onoff=%d, l_linger=%d}"
67 ", [%d]) = %s\n",
68 fd, linger->l_onoff, linger->l_linger, *len, errstr);
69
70 /* classic setsockopt */
71 linger->l_onoff = -15;
72 linger->l_linger = -42;
73 set_linger(fd, linger, sizeof(*linger));
74 printf("setsockopt(%d, SOL_SOCKET, SO_LINGER, {l_onoff=%d, l_linger=%d}"
75 ", %d) = %s\n",
76 fd, linger->l_onoff, linger->l_linger,
77 (unsigned int) sizeof(*linger), errstr);
78
79 /* setsockopt with optlen larger than necessary */
80 set_linger(fd, linger, sizeof(*linger) + 1);
81 printf("setsockopt(%d, SOL_SOCKET, SO_LINGER, {l_onoff=%d, l_linger=%d}"
82 ", %d) = %s\n",
83 fd, linger->l_onoff, linger->l_linger,
84 (unsigned int) sizeof(*linger) + 1, errstr);
85
86 /* setsockopt with optlen < 0 - EINVAL */
87 set_linger(fd, linger, -1U);
88 printf("setsockopt(%d, SOL_SOCKET, SO_LINGER, %p, -1) = %s\n",
89 fd, linger, errstr);
90
91 /* setsockopt with optlen smaller than necessary - EINVAL */
92 set_linger(fd, linger, sizeof(linger->l_onoff));
93 printf("setsockopt(%d, SOL_SOCKET, SO_LINGER, %p, %d) = %s\n",
94 fd, linger, (unsigned int) sizeof(linger->l_onoff), errstr);
95
96 /* setsockopt optval EFAULT */
97 set_linger(fd, &linger->l_linger, sizeof(*linger));
98 printf("setsockopt(%d, SOL_SOCKET, SO_LINGER, %p, %d) = %s\n",
99 fd, &linger->l_linger, (unsigned int) sizeof(*linger), errstr);
100
101 /* getsockopt with optlen larger than necessary - shortened */
102 *len = sizeof(*linger) + 1;
103 get_linger(fd, linger, len);
104 printf("getsockopt(%d, SOL_SOCKET, SO_LINGER, {l_onoff=%d, l_linger=%d}"
105 ", [%u->%d]) = %s\n",
106 fd, linger->l_onoff, linger->l_linger,
107 (unsigned int) sizeof(*linger) + 1, *len, errstr);
108
109 /* getsockopt with optlen larger than usual - truncated to l_onoff */
110 *len = sizeof(linger->l_onoff);
111 get_linger(fd, linger, len);
112 printf("getsockopt(%d, SOL_SOCKET, SO_LINGER, {l_onoff=%d}"
113 ", [%d]) = %s\n",
114 fd, linger->l_onoff, *len, errstr);
115
116 /* getsockopt with optlen larger than usual - truncated to raw */
117 *len = sizeof(*linger) - 1;
118 get_linger(fd, linger, len);
119 printf("getsockopt(%d, SOL_SOCKET, SO_LINGER, ", fd);
120 print_quoted_hex(linger, *len);
121 printf(", [%d]) = %s\n", *len, errstr);
122
123 /* getsockopt optval EFAULT */
124 *len = sizeof(*linger);
125 get_linger(fd, &linger->l_linger, len);
126 printf("getsockopt(%d, SOL_SOCKET, SO_LINGER, %p, [%d]) = %s\n",
127 fd, &linger->l_linger, *len, errstr);
128
129 /* getsockopt optlen EFAULT */
130 get_linger(fd, linger, len + 1);
131 printf("getsockopt(%d, SOL_SOCKET, SO_LINGER, %p, %p) = %s\n",
132 fd, linger, len + 1, errstr);
133
134 puts("+++ exited with 0 +++");
135 return 0;
136 }
137