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_BR_PORT_MSG
32
33# include <stdio.h>
34# include "test_nlattr.h"
35# include <arpa/inet.h>
36# include <linux/if_bridge.h>
37# include <linux/rtnetlink.h>
38
39# ifndef MDB_TEMPORARY
40#  define MDB_TEMPORARY 0
41# endif
42# ifndef MDBA_MDB_ENTRY_INFO
43#  define MDBA_MDB_ENTRY_INFO 1
44# endif
45# ifndef MDBA_MDB_EATTR_TIMER
46#  define MDBA_MDB_EATTR_TIMER 1
47# endif
48
49const unsigned int hdrlen = sizeof(struct br_port_msg);
50
51static void
52init_br_port_msg(struct nlmsghdr *const nlh, const unsigned int msg_len)
53{
54	unsigned int len = msg_len;
55
56	SET_STRUCT(struct nlmsghdr, nlh,
57		.nlmsg_len = len,
58		.nlmsg_type = RTM_GETMDB,
59		.nlmsg_flags = NLM_F_DUMP
60	);
61
62	struct br_port_msg *const msg = NLMSG_DATA(nlh);
63	SET_STRUCT(struct br_port_msg, msg,
64		.family = AF_UNIX,
65		.ifindex = ifindex_lo()
66	);
67
68	struct nlattr *nla = NLMSG_ATTR(nlh, sizeof(*msg));
69	len -= NLMSG_SPACE(hdrlen);
70	SET_STRUCT(struct nlattr, nla,
71		.nla_len = len,
72		.nla_type = MDBA_MDB
73	);
74
75	nla = nla + 1;
76	len -= NLA_HDRLEN;
77	SET_STRUCT(struct nlattr, nla,
78		.nla_len = len,
79		.nla_type = MDBA_MDB_ENTRY
80	);
81}
82
83static void
84print_br_port_msg(const unsigned int msg_len)
85{
86	printf("{len=%u, type=RTM_GETMDB, flags=NLM_F_DUMP"
87	       ", seq=0, pid=0}, {family=AF_UNIX"
88	       ", ifindex=" IFINDEX_LO_STR "}"
89	       ", {{nla_len=%u, nla_type=MDBA_MDB}"
90	       ", {{nla_len=%u, nla_type=MDBA_MDB_ENTRY}",
91	       msg_len, msg_len - NLMSG_SPACE(hdrlen),
92	       msg_len - NLMSG_SPACE(hdrlen) - NLA_HDRLEN);
93}
94
95int
96main(void)
97{
98	skip_if_unavailable("/proc/self/fd/");
99
100	const int fd = create_nl_socket(NETLINK_ROUTE);
101
102	void *nlh0 = tail_alloc(NLMSG_SPACE(hdrlen));
103
104	static char pattern[4096];
105	fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
106
107	const unsigned int nla_type = 0xffff & NLA_TYPE_MASK;
108	char nla_type_str[256];
109	sprintf(nla_type_str, "%#x /* MDBA_MDB_ENTRY_??? */", nla_type);
110	TEST_NLATTR_(fd, nlh0 - NLA_HDRLEN * 2, hdrlen + NLA_HDRLEN * 2,
111		     init_br_port_msg, print_br_port_msg,
112		     nla_type, nla_type_str,
113		     4, pattern, 4,
114		     print_quoted_hex(pattern, 4);
115		     printf("}}"));
116
117# ifdef HAVE_STRUCT_BR_MDB_ENTRY
118	struct br_mdb_entry entry = {
119		.ifindex = ifindex_lo(),
120		.state = MDB_TEMPORARY,
121#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_FLAGS
122		.flags = MDB_FLAGS_OFFLOAD,
123#  endif
124#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_VID
125		.vid = 0xcdef,
126#  endif
127		.addr = {
128			.proto = htons(AF_UNSPEC)
129		}
130	};
131
132	memcpy(&entry.addr.u, pattern, sizeof(entry.addr.u));
133	TEST_NESTED_NLATTR_OBJECT_EX(fd, nlh0, hdrlen,
134				     init_br_port_msg, print_br_port_msg,
135				     MDBA_MDB_ENTRY_INFO, pattern, entry, 2,
136				     printf("{ifindex=" IFINDEX_LO_STR);
137				     printf(", state=MDB_TEMPORARY");
138#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_FLAGS
139				     printf(", flags=MDB_FLAGS_OFFLOAD");
140#  endif
141#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_VID
142				     PRINT_FIELD_U(", ", entry, vid);
143#  endif
144				     printf(", addr={u=");
145				     print_quoted_hex(&entry.addr.u,
146						      sizeof(entry.addr.u));
147				     printf(", proto=htons(AF_UNSPEC)}}"));
148
149	static const struct nlattr nla = {
150		.nla_len = sizeof(nla),
151		.nla_type = MDBA_MDB_EATTR_TIMER
152	};
153	char buf[NLMSG_ALIGN(sizeof(entry)) + sizeof(nla)];
154	memcpy(buf, &entry, sizeof(entry));
155	memcpy(buf + NLMSG_ALIGN(sizeof(entry)), &nla, sizeof(nla));
156	TEST_NLATTR(fd, nlh0 - NLA_HDRLEN * 2, hdrlen + NLA_HDRLEN * 2,
157		    init_br_port_msg, print_br_port_msg,
158		    MDBA_MDB_ENTRY_INFO, sizeof(buf), buf, sizeof(buf),
159		    printf("{ifindex=" IFINDEX_LO_STR);
160		    printf(", state=MDB_TEMPORARY");
161#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_FLAGS
162		    printf(", flags=MDB_FLAGS_OFFLOAD");
163#  endif
164#  ifdef HAVE_STRUCT_BR_MDB_ENTRY_VID
165		    PRINT_FIELD_U(", ", entry, vid);
166#  endif
167		    printf(", addr={u=");
168		    print_quoted_hex(&entry.addr.u, sizeof(entry.addr.u));
169		    printf(", proto=htons(AF_UNSPEC)}}"
170			   ", {nla_len=%u, nla_type=MDBA_MDB_EATTR_TIMER}}}",
171			   nla.nla_len));
172# endif /* HAVE_STRUCT_BR_MDB_ENTRY */
173
174	puts("+++ exited with 0 +++");
175	return 0;
176}
177
178#else
179
180SKIP_MAIN_UNDEFINED("HAVE_STRUCT_BR_PORT_MSG")
181
182#endif
183