1 /*
2 * Check decoding of MCAST_JOIN_GROUP/MCAST_LEAVE_GROUP.
3 *
4 * Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
5 * Copyright (c) 2017-2018 The strace developers.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "tests.h"
32 #include <net/if.h>
33 #include <netinet/in.h>
34
35 #if defined MCAST_JOIN_GROUP && defined MCAST_LEAVE_GROUP
36
37 # include <limits.h>
38 # include <stdio.h>
39 # include <unistd.h>
40 # include <sys/socket.h>
41 # include <arpa/inet.h>
42
43 #define multi4addr "224.0.0.3"
44 #define multi6addr "ff01::c"
45
46 static const char *errstr;
47
48 static int
set_opt(const int fd,const int level,const int opt,const void * const val,const socklen_t len)49 set_opt(const int fd, const int level, const int opt,
50 const void *const val, const socklen_t len)
51 {
52 int rc = setsockopt(fd, level, opt, val, len);
53 errstr = sprintrc(rc);
54 return rc;
55 }
56
57 int
main(void)58 main(void)
59 {
60 TAIL_ALLOC_OBJECT_CONST_PTR(struct group_req, greq4);
61 TAIL_ALLOC_OBJECT_CONST_PTR(struct group_req, greq6);
62 unsigned int i;
63
64 greq6->gr_interface = greq4->gr_interface = ifindex_lo();
65 if (!greq4->gr_interface)
66 perror_msg_and_skip("lo");
67
68 greq4->gr_group.ss_family = AF_INET;
69 inet_pton(AF_INET, multi4addr, &greq4->gr_group.ss_family + 2);
70
71 greq6->gr_group.ss_family = AF_INET6;
72 inet_pton(AF_INET6, multi6addr, &greq6->gr_group.ss_family + 4);
73
74 (void) close(0);
75 if (socket(AF_INET, SOCK_DGRAM, 0))
76 perror_msg_and_skip("socket");
77
78 struct {
79 const int level;
80 const char *const str_level;
81 const int name;
82 const char *const str_name;
83 const struct group_req *const val;
84 const char *const addr;
85 } opts[] = {
86 {
87 ARG_STR(SOL_IP), ARG_STR(MCAST_JOIN_GROUP), greq4,
88 "gr_group={sa_family=AF_INET, sin_port=htons(65535)"
89 ", sin_addr=inet_addr(\"" multi4addr "\")}"
90 },
91 {
92 ARG_STR(SOL_IP), ARG_STR(MCAST_LEAVE_GROUP), greq4,
93 "gr_group={sa_family=AF_INET, sin_port=htons(65535)"
94 ", sin_addr=inet_addr(\"" multi4addr "\")}"
95 },
96 {
97 ARG_STR(SOL_IPV6), ARG_STR(MCAST_JOIN_GROUP), greq6,
98 "gr_group={sa_family=AF_INET6, sin6_port=htons(65535)"
99 ", inet_pton(AF_INET6, \"" multi6addr "\", &sin6_addr)"
100 ", sin6_flowinfo=htonl(4294967295)"
101 ", sin6_scope_id=4294967295}"
102 },
103 {
104 ARG_STR(SOL_IPV6), ARG_STR(MCAST_LEAVE_GROUP), greq6,
105 "gr_group={sa_family=AF_INET6, sin6_port=htons(65535)"
106 ", inet_pton(AF_INET6, \"" multi6addr "\", &sin6_addr)"
107 ", sin6_flowinfo=htonl(4294967295)"
108 ", sin6_scope_id=4294967295}"
109 }
110 };
111
112 for (i = 0; i < ARRAY_SIZE(opts); ++i) {
113 /* optlen < 0, EINVAL */
114 set_opt(0, opts[i].level, opts[i].name, opts[i].val, -1U);
115 printf("setsockopt(0, %s, %s, %p, -1) = %s\n",
116 opts[i].str_level, opts[i].str_name,
117 opts[i].val, errstr);
118
119 /* optlen < sizeof(struct group_req), EINVAL */
120 set_opt(0, opts[i].level, opts[i].name, opts[i].val,
121 sizeof(*opts[i].val) - 1);
122 printf("setsockopt(0, %s, %s, %p, %u) = %s\n",
123 opts[i].str_level, opts[i].str_name,
124 opts[i].val, (unsigned int) sizeof(*opts[i].val) - 1,
125 errstr);
126
127 /* optval EFAULT */
128 set_opt(0, opts[i].level, opts[i].name,
129 (const char *) opts[i].val + 1, sizeof(*opts[i].val));
130 printf("setsockopt(0, %s, %s, %p, %u) = %s\n",
131 opts[i].str_level, opts[i].str_name,
132 (const char *) opts[i].val + 1,
133 (unsigned int) sizeof(*opts[i].val), errstr);
134
135 /* classic */
136 set_opt(0, opts[i].level, opts[i].name,
137 opts[i].val, sizeof(*opts[i].val));
138 printf("setsockopt(0, %s, %s"
139 ", {gr_interface=%s, %s}, %u) = %s\n",
140 opts[i].str_level, opts[i].str_name,
141 IFINDEX_LO_STR, opts[i].addr,
142 (unsigned int) sizeof(*opts[i].val), errstr);
143
144 /* optlen > sizeof(struct group_req), shortened */
145 set_opt(0, opts[i].level, opts[i].name, opts[i].val, INT_MAX);
146 printf("setsockopt(0, %s, %s"
147 ", {gr_interface=%s, %s}, %u) = %s\n",
148 opts[i].str_level, opts[i].str_name,
149 IFINDEX_LO_STR, opts[i].addr,
150 INT_MAX, errstr);
151 }
152
153 puts("+++ exited with 0 +++");
154 return 0;
155 }
156
157 #else
158
159 SKIP_MAIN_UNDEFINED("MCAST_JOIN_GROUP && MCAST_LEAVE_GROUP")
160
161 #endif
162