1 /*
2 * Copyright (c) 2017 The strace developers.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 /* This test case is based on netlink_selinux.c */
28
29 #include "tests.h"
30
31 #ifdef HAVE_LINUX_GENETLINK_H
32
33 # include <stdio.h>
34 # include <string.h>
35 # include <unistd.h>
36 # include <sys/socket.h>
37 # include "netlink.h"
38 # include <linux/genetlink.h>
39
40 static void
test_nlmsg_type(const int fd)41 test_nlmsg_type(const int fd)
42 {
43 /*
44 * Though GENL_ID_CTRL number is statically fixed in this test case,
45 * strace does not have a builtin knowledge that the corresponding
46 * string is "nlctrl".
47 */
48 long rc;
49 struct {
50 const struct nlmsghdr nlh;
51 struct genlmsghdr gnlh;
52 } req = {
53 .nlh = {
54 .nlmsg_len = sizeof(req),
55 .nlmsg_type = GENL_ID_CTRL,
56 .nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST
57 },
58 .gnlh = {
59 .cmd = CTRL_CMD_GETFAMILY
60 }
61 };
62
63 rc = sendto(fd, &req, sizeof(req), MSG_DONTWAIT, NULL, 0);
64 printf("sendto(%d, {{len=%u, type=nlctrl"
65 ", flags=NLM_F_REQUEST|0x300, seq=0, pid=0}"
66 ", \"\\3\\0\\0\\0\"}, %u, MSG_DONTWAIT, NULL, 0) = %s\n",
67 fd, req.nlh.nlmsg_len,
68 (unsigned int) sizeof(req), sprintrc(rc));
69 }
70
main(void)71 int main(void)
72 {
73 skip_if_unavailable("/proc/self/fd/");
74
75 int fd = create_nl_socket(NETLINK_GENERIC);
76
77 test_nlmsg_type(fd);
78
79 printf("+++ exited with 0 +++\n");
80
81 return 0;
82 }
83
84 #else
85
86 SKIP_MAIN_UNDEFINED("HAVE_LINUX_GENETLINK_H")
87
88 #endif
89