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#include <stdio.h>
32#include <inttypes.h>
33#include "test_nlattr.h"
34#include <linux/if.h>
35#include <linux/if_arp.h>
36#ifdef HAVE_LINUX_IF_LINK_H
37# include <linux/if_link.h>
38#endif
39#include <linux/rtnetlink.h>
40
41#define IFLA_BRPORT_PRIORITY 2
42#define IFLA_BRPORT_MESSAGE_AGE_TIMER 21
43
44const unsigned int hdrlen = sizeof(struct ifinfomsg);
45
46static void
47init_ifinfomsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
48{
49	SET_STRUCT(struct nlmsghdr, nlh,
50		.nlmsg_len = msg_len,
51		.nlmsg_type = RTM_GETLINK,
52		.nlmsg_flags = NLM_F_DUMP
53	);
54
55	struct ifinfomsg *const msg = NLMSG_DATA(nlh);
56	SET_STRUCT(struct ifinfomsg, msg,
57		.ifi_family = AF_UNIX,
58		.ifi_type = ARPHRD_LOOPBACK,
59		.ifi_index = ifindex_lo(),
60		.ifi_flags = IFF_UP,
61	);
62
63	struct nlattr *const nla = NLMSG_ATTR(nlh, sizeof(*msg));
64	SET_STRUCT(struct nlattr, nla,
65		.nla_len = msg_len - NLMSG_SPACE(hdrlen),
66		.nla_type = IFLA_PROTINFO
67	);
68}
69
70static void
71print_ifinfomsg(const unsigned int msg_len)
72{
73	printf("{len=%u, type=RTM_GETLINK, flags=NLM_F_DUMP"
74	       ", seq=0, pid=0}, {ifi_family=AF_UNIX"
75	       ", ifi_type=ARPHRD_LOOPBACK"
76	       ", ifi_index=" IFINDEX_LO_STR
77	       ", ifi_flags=IFF_UP, ifi_change=0}"
78	       ", {{nla_len=%u, nla_type=IFLA_PROTINFO}",
79	       msg_len, msg_len - NLMSG_SPACE(hdrlen));
80}
81
82int
83main(void)
84{
85	skip_if_unavailable("/proc/self/fd/");
86
87	const int fd = create_nl_socket(NETLINK_ROUTE);
88	void *nlh0 = tail_alloc(NLMSG_SPACE(hdrlen));
89
90	static char pattern[4096];
91	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
92
93	const uint16_t u16 = 0xabcd;
94	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
95				  init_ifinfomsg, print_ifinfomsg,
96				  IFLA_BRPORT_PRIORITY, pattern, u16,
97				  printf("%u", u16));
98
99	const uint64_t u64 = 0xabcdedeeefeafeab;
100	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
101				  init_ifinfomsg, print_ifinfomsg,
102				  IFLA_BRPORT_MESSAGE_AGE_TIMER, pattern, u64,
103				  printf("%" PRIu64, u64));
104
105#ifdef HAVE_STRUCT_IFLA_BRIDGE_ID
106	static const struct ifla_bridge_id id = {
107		.prio = { 0xab, 0xcd },
108		.addr = { 0xab, 0xcd, 0xef, 0xac, 0xbc, 0xcd }
109	};
110	TEST_NESTED_NLATTR_OBJECT(fd, nlh0, hdrlen,
111				  init_ifinfomsg, print_ifinfomsg,
112				  IFLA_BRPORT_ROOT_ID, pattern, id,
113				  printf("{prio=[%u, %u]"
114					 ", addr=%02x:%02x:%02x:%02x:%02x:%02x}",
115					 id.prio[0], id.prio[1],
116					 id.addr[0], id.addr[1], id.addr[2],
117					 id.addr[3], id.addr[4], id.addr[5]));
118#endif
119
120	puts("+++ exited with 0 +++");
121	return 0;
122}
123