1 /*
2 * Copyright (c) 2014-2016 Dmitry V. Levin <ldv@altlinux.org>
3 * Copyright (c) 2014-2017 The strace developers.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include "tests.h"
30 #include <assert.h>
31 #include <fcntl.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <unistd.h>
35 #include <sys/socket.h>
36
main(int ac,const char ** av)37 int main(int ac, const char **av)
38 {
39 assert(ac > 0);
40 int fds[ac];
41
42 static const char sample[] =
43 "\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff";
44 const unsigned int data_size = sizeof(sample) - 1;
45 void *data = tail_alloc(data_size);
46 memcpy(data, sample, data_size);
47
48 TAIL_ALLOC_OBJECT_CONST_PTR(struct iovec, iov);
49 iov->iov_base = data;
50 iov->iov_len = data_size;
51
52 TAIL_ALLOC_OBJECT_CONST_PTR(struct msghdr, mh);
53 memset(mh, 0, sizeof(*mh));
54 mh->msg_iov = iov;
55 mh->msg_iovlen = 1;
56
57 int i;
58 while ((i = open("/dev/null", O_RDWR)) <= ac + 2)
59 assert(i >= 0);
60 while (i > 2)
61 assert(close(i--) == 0);
62 assert(close(0) == 0);
63
64 int sv[2];
65 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv))
66 perror_msg_and_skip("socketpair");
67 int one = 1;
68 if (setsockopt(sv[0], SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)))
69 perror_msg_and_skip("setsockopt");
70
71 assert((fds[0] = open("/dev/null", O_RDWR)) == 4);
72 for (i = 1; i < ac; ++i)
73 assert((fds[i] = open(av[i], O_RDONLY)) == i + 4);
74
75 unsigned int cmsg_size = CMSG_SPACE(sizeof(fds));
76 struct cmsghdr *cmsg = tail_alloc(cmsg_size);
77 memset(cmsg, 0, cmsg_size);
78 cmsg->cmsg_level = SOL_SOCKET;
79 cmsg->cmsg_type = SCM_RIGHTS;
80 cmsg->cmsg_len = CMSG_LEN(sizeof(fds));
81 memcpy(CMSG_DATA(cmsg), fds, sizeof(fds));
82
83 mh->msg_control = cmsg;
84 mh->msg_controllen = cmsg_size;
85
86 assert(sendmsg(sv[1], mh, 0) == (int) data_size);
87
88 assert(close(sv[1]) == 0);
89 assert(open("/dev/null", O_RDWR) == sv[1]);
90
91 for (i = 0; i < ac; ++i) {
92 assert(close(fds[i]) == 0);
93 fds[i] = 0;
94 }
95
96 cmsg_size += CMSG_SPACE(sizeof(struct ucred));
97 cmsg = tail_alloc(cmsg_size);
98 memset(cmsg, 0, cmsg_size);
99 mh->msg_control = cmsg;
100 mh->msg_controllen = cmsg_size;
101
102 assert(recvmsg(0, mh, 0) == (int) data_size);
103 assert(close(0) == 0);
104
105 return 0;
106 }
107