1 /*
2  * Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
3  * Copyright (c) 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 
31 #ifdef HAVE_STRUCT_NETCONFMSG
32 
33 # include <stdio.h>
34 # include "test_nlattr.h"
35 # include <linux/netconf.h>
36 # include <linux/rtnetlink.h>
37 
38 static void
39 init_netconfmsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
40 {
41 	SET_STRUCT(struct nlmsghdr, nlh,
42 		.nlmsg_len = msg_len,
43 		.nlmsg_type = RTM_GETNETCONF,
44 		.nlmsg_flags = NLM_F_DUMP
45 	);
46 
47 	struct netconfmsg *const msg = NLMSG_DATA(nlh);
48 	SET_STRUCT(struct netconfmsg, msg,
49 		.ncm_family = AF_INET
50 	);
51 }
52 
53 static void
54 print_netconfmsg(const unsigned int msg_len)
55 {
56 	printf("{len=%u, type=RTM_GETNETCONF, flags=NLM_F_DUMP"
57 	       ", seq=0, pid=0}, {ncm_family=AF_INET}",
58 	       msg_len);
59 }
60 
61 int
62 main(void)
63 {
64 	skip_if_unavailable("/proc/self/fd/");
65 
66 	const int fd = create_nl_socket(NETLINK_ROUTE);
67 
68 	const unsigned int hdrlen = sizeof(struct netconfmsg);
69 	void *nlh0 = tail_alloc(NLMSG_SPACE(hdrlen));
70 
71 	static char pattern[4096];
72 	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
73 
74 	const unsigned int nla_type = 0xffff & NLA_TYPE_MASK;
75 	char nla_type_str[256];
76 	sprintf(nla_type_str, "%#x /* NETCONFA_??? */", nla_type);
77 	TEST_NLATTR_(fd, nlh0, hdrlen,
78 		     init_netconfmsg, print_netconfmsg,
79 		     nla_type, nla_type_str,
80 		     4, pattern, 4,
81 		     print_quoted_hex(pattern, 4));
82 
83 	puts("+++ exited with 0 +++");
84 	return 0;
85 }
86 
87 #else
88 
89 SKIP_MAIN_UNDEFINED("HAVE_STRUCT_NETCONFMSG")
90 
91 #endif
92