1 /*
2 * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
3 * Copyright (c) 2017-2018 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 <stdio.h>
31 #include <stdint.h>
32 #include "test_nlattr.h"
33
34 #define NLMSGERR_ATTR_COOKIE 3
35
36 static void
init_nlmsgerr(struct nlmsghdr * const nlh,const unsigned int msg_len)37 init_nlmsgerr(struct nlmsghdr *const nlh, const unsigned int msg_len)
38 {
39 SET_STRUCT(struct nlmsghdr, nlh,
40 .nlmsg_len = msg_len,
41 .nlmsg_type = NLMSG_ERROR,
42 .nlmsg_flags = NLM_F_REQUEST | NLM_F_CAPPED
43 );
44
45 struct nlmsgerr *const err = NLMSG_DATA(nlh);
46 SET_STRUCT(struct nlmsgerr, err,
47 .error = -13,
48 .msg = {
49 .nlmsg_len = NLMSG_HDRLEN + 4,
50 .nlmsg_type = NLMSG_NOOP,
51 .nlmsg_flags = NLM_F_REQUEST,
52 }
53 );
54 }
55
56 static void
print_nlmsgerr(const unsigned int msg_len)57 print_nlmsgerr(const unsigned int msg_len)
58 {
59 printf("{len=%u, type=NLMSG_ERROR"
60 ", flags=NLM_F_REQUEST|NLM_F_CAPPED"
61 ", seq=0, pid=0}, {error=-EACCES"
62 ", msg={len=%u, type=NLMSG_NOOP"
63 ", flags=NLM_F_REQUEST, seq=0, pid=0}",
64 msg_len, NLMSG_HDRLEN + 4);
65 }
66
67 int
main(void)68 main(void)
69 {
70 skip_if_unavailable("/proc/self/fd/");
71
72 static const uint8_t cookie[] = { 0xab, 0xfe };
73
74 const int fd = create_nl_socket(NETLINK_SOCK_DIAG);
75 const unsigned int hdrlen = sizeof(struct nlmsgerr);
76 void *const nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen),
77 NLA_HDRLEN + sizeof(cookie));
78
79 TEST_NLATTR(fd, nlh0, hdrlen,
80 init_nlmsgerr, print_nlmsgerr,
81 NLMSGERR_ATTR_COOKIE,
82 sizeof(cookie), cookie, sizeof(cookie),
83 printf("[%u, %u]", cookie[0], cookie[1]);
84 printf("}"));
85
86 printf("+++ exited with 0 +++\n");
87 return 0;
88 }
89