1/*
2 * net/tipc/netlink.c: TIPC configuration handling
3 *
4 * Copyright (c) 2005-2006, 2014, Ericsson AB
5 * Copyright (c) 2005-2007, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 *    contributors may be used to endorse or promote products derived from
18 *    this software without specific prior written permission.
19 *
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include "core.h"
38#include "socket.h"
39#include "name_table.h"
40#include "bearer.h"
41#include "link.h"
42#include "node.h"
43#include "net.h"
44#include "udp_media.h"
45#include <net/genetlink.h>
46
47static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
48	[TIPC_NLA_UNSPEC]	= { .type = NLA_UNSPEC, },
49	[TIPC_NLA_BEARER]	= { .type = NLA_NESTED, },
50	[TIPC_NLA_SOCK]		= { .type = NLA_NESTED, },
51	[TIPC_NLA_PUBL]		= { .type = NLA_NESTED, },
52	[TIPC_NLA_LINK]		= { .type = NLA_NESTED, },
53	[TIPC_NLA_MEDIA]	= { .type = NLA_NESTED, },
54	[TIPC_NLA_NODE]		= { .type = NLA_NESTED, },
55	[TIPC_NLA_NET]		= { .type = NLA_NESTED, },
56	[TIPC_NLA_NAME_TABLE]	= { .type = NLA_NESTED, },
57	[TIPC_NLA_MON]		= { .type = NLA_NESTED, },
58};
59
60const struct nla_policy
61tipc_nl_name_table_policy[TIPC_NLA_NAME_TABLE_MAX + 1] = {
62	[TIPC_NLA_NAME_TABLE_UNSPEC]	= { .type = NLA_UNSPEC },
63	[TIPC_NLA_NAME_TABLE_PUBL]	= { .type = NLA_NESTED }
64};
65
66const struct nla_policy tipc_nl_monitor_policy[TIPC_NLA_MON_MAX + 1] = {
67	[TIPC_NLA_MON_UNSPEC]			= { .type = NLA_UNSPEC },
68	[TIPC_NLA_MON_REF]			= { .type = NLA_U32 },
69	[TIPC_NLA_MON_ACTIVATION_THRESHOLD]	= { .type = NLA_U32 },
70};
71
72const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = {
73	[TIPC_NLA_SOCK_UNSPEC]		= { .type = NLA_UNSPEC },
74	[TIPC_NLA_SOCK_ADDR]		= { .type = NLA_U32 },
75	[TIPC_NLA_SOCK_REF]		= { .type = NLA_U32 },
76	[TIPC_NLA_SOCK_CON]		= { .type = NLA_NESTED },
77	[TIPC_NLA_SOCK_HAS_PUBL]	= { .type = NLA_FLAG }
78};
79
80const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = {
81	[TIPC_NLA_NET_UNSPEC]		= { .type = NLA_UNSPEC },
82	[TIPC_NLA_NET_ID]		= { .type = NLA_U32 },
83	[TIPC_NLA_NET_ADDR]		= { .type = NLA_U32 },
84	[TIPC_NLA_NET_NODEID]		= { .type = NLA_U64 },
85	[TIPC_NLA_NET_NODEID_W1]	= { .type = NLA_U64 },
86	[TIPC_NLA_NET_ADDR_LEGACY]	= { .type = NLA_FLAG }
87};
88
89const struct nla_policy tipc_nl_link_policy[TIPC_NLA_LINK_MAX + 1] = {
90	[TIPC_NLA_LINK_UNSPEC]		= { .type = NLA_UNSPEC },
91	[TIPC_NLA_LINK_NAME]		= { .type = NLA_NUL_STRING,
92					    .len = TIPC_MAX_LINK_NAME },
93	[TIPC_NLA_LINK_MTU]		= { .type = NLA_U32 },
94	[TIPC_NLA_LINK_BROADCAST]	= { .type = NLA_FLAG },
95	[TIPC_NLA_LINK_UP]		= { .type = NLA_FLAG },
96	[TIPC_NLA_LINK_ACTIVE]		= { .type = NLA_FLAG },
97	[TIPC_NLA_LINK_PROP]		= { .type = NLA_NESTED },
98	[TIPC_NLA_LINK_STATS]		= { .type = NLA_NESTED },
99	[TIPC_NLA_LINK_RX]		= { .type = NLA_U32 },
100	[TIPC_NLA_LINK_TX]		= { .type = NLA_U32 }
101};
102
103const struct nla_policy tipc_nl_node_policy[TIPC_NLA_NODE_MAX + 1] = {
104	[TIPC_NLA_NODE_UNSPEC]		= { .type = NLA_UNSPEC },
105	[TIPC_NLA_NODE_ADDR]		= { .type = NLA_U32 },
106	[TIPC_NLA_NODE_UP]		= { .type = NLA_FLAG },
107	[TIPC_NLA_NODE_ID]		= { .type = NLA_BINARY,
108					    .len = TIPC_NODEID_LEN},
109	[TIPC_NLA_NODE_KEY]		= { .type = NLA_BINARY,
110					    .len = TIPC_AEAD_KEY_SIZE_MAX},
111	[TIPC_NLA_NODE_KEY_MASTER]	= { .type = NLA_FLAG },
112	[TIPC_NLA_NODE_REKEYING]	= { .type = NLA_U32 },
113};
114
115/* Properties valid for media, bearer and link */
116const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = {
117	[TIPC_NLA_PROP_UNSPEC]		= { .type = NLA_UNSPEC },
118	[TIPC_NLA_PROP_PRIO]		= { .type = NLA_U32 },
119	[TIPC_NLA_PROP_TOL]		= { .type = NLA_U32 },
120	[TIPC_NLA_PROP_WIN]		= { .type = NLA_U32 },
121	[TIPC_NLA_PROP_MTU]		= { .type = NLA_U32 },
122	[TIPC_NLA_PROP_BROADCAST]	= { .type = NLA_U32 },
123	[TIPC_NLA_PROP_BROADCAST_RATIO]	= { .type = NLA_U32 }
124};
125
126const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1]	= {
127	[TIPC_NLA_BEARER_UNSPEC]	= { .type = NLA_UNSPEC },
128	[TIPC_NLA_BEARER_NAME]		= { .type = NLA_NUL_STRING,
129					    .len = TIPC_MAX_BEARER_NAME },
130	[TIPC_NLA_BEARER_PROP]		= { .type = NLA_NESTED },
131	[TIPC_NLA_BEARER_DOMAIN]	= { .type = NLA_U32 }
132};
133
134const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
135	[TIPC_NLA_MEDIA_UNSPEC]		= { .type = NLA_UNSPEC },
136	[TIPC_NLA_MEDIA_NAME]		= { .type = NLA_STRING },
137	[TIPC_NLA_MEDIA_PROP]		= { .type = NLA_NESTED }
138};
139
140const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
141	[TIPC_NLA_UDP_UNSPEC]	= {.type = NLA_UNSPEC},
142	[TIPC_NLA_UDP_LOCAL]	= {.type = NLA_BINARY,
143				   .len = sizeof(struct sockaddr_storage)},
144	[TIPC_NLA_UDP_REMOTE]	= {.type = NLA_BINARY,
145				   .len = sizeof(struct sockaddr_storage)},
146};
147
148/* Users of the legacy API (tipc-config) can't handle that we add operations,
149 * so we have a separate genl handling for the new API.
150 */
151static const struct genl_ops tipc_genl_v2_ops[] = {
152	{
153		.cmd	= TIPC_NL_BEARER_DISABLE,
154		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
155		.doit	= tipc_nl_bearer_disable,
156	},
157	{
158		.cmd	= TIPC_NL_BEARER_ENABLE,
159		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
160		.doit	= tipc_nl_bearer_enable,
161	},
162	{
163		.cmd	= TIPC_NL_BEARER_GET,
164		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
165		.doit	= tipc_nl_bearer_get,
166		.dumpit	= tipc_nl_bearer_dump,
167	},
168	{
169		.cmd	= TIPC_NL_BEARER_ADD,
170		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
171		.doit	= tipc_nl_bearer_add,
172	},
173	{
174		.cmd	= TIPC_NL_BEARER_SET,
175		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
176		.doit	= tipc_nl_bearer_set,
177	},
178	{
179		.cmd	= TIPC_NL_SOCK_GET,
180		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
181		.start = tipc_dump_start,
182		.dumpit	= tipc_nl_sk_dump,
183		.done	= tipc_dump_done,
184	},
185	{
186		.cmd	= TIPC_NL_PUBL_GET,
187		.validate = GENL_DONT_VALIDATE_STRICT |
188			    GENL_DONT_VALIDATE_DUMP_STRICT,
189		.dumpit	= tipc_nl_publ_dump,
190	},
191	{
192		.cmd	= TIPC_NL_LINK_GET,
193		.validate = GENL_DONT_VALIDATE_STRICT,
194		.doit   = tipc_nl_node_get_link,
195		.dumpit	= tipc_nl_node_dump_link,
196	},
197	{
198		.cmd	= TIPC_NL_LINK_SET,
199		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
200		.doit	= tipc_nl_node_set_link,
201	},
202	{
203		.cmd	= TIPC_NL_LINK_RESET_STATS,
204		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
205		.doit   = tipc_nl_node_reset_link_stats,
206	},
207	{
208		.cmd	= TIPC_NL_MEDIA_GET,
209		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
210		.doit	= tipc_nl_media_get,
211		.dumpit	= tipc_nl_media_dump,
212	},
213	{
214		.cmd	= TIPC_NL_MEDIA_SET,
215		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
216		.doit	= tipc_nl_media_set,
217	},
218	{
219		.cmd	= TIPC_NL_NODE_GET,
220		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
221		.dumpit	= tipc_nl_node_dump,
222	},
223	{
224		.cmd	= TIPC_NL_NET_GET,
225		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
226		.dumpit	= tipc_nl_net_dump,
227	},
228	{
229		.cmd	= TIPC_NL_NET_SET,
230		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
231		.doit	= tipc_nl_net_set,
232	},
233	{
234		.cmd	= TIPC_NL_NAME_TABLE_GET,
235		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
236		.dumpit	= tipc_nl_name_table_dump,
237	},
238	{
239		.cmd	= TIPC_NL_MON_SET,
240		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
241		.doit	= tipc_nl_node_set_monitor,
242	},
243	{
244		.cmd	= TIPC_NL_MON_GET,
245		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
246		.doit	= tipc_nl_node_get_monitor,
247		.dumpit	= tipc_nl_node_dump_monitor,
248	},
249	{
250		.cmd	= TIPC_NL_MON_PEER_GET,
251		.validate = GENL_DONT_VALIDATE_STRICT |
252			    GENL_DONT_VALIDATE_DUMP_STRICT,
253		.dumpit	= tipc_nl_node_dump_monitor_peer,
254	},
255	{
256		.cmd	= TIPC_NL_PEER_REMOVE,
257		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
258		.doit	= tipc_nl_peer_rm,
259	},
260#ifdef CONFIG_TIPC_MEDIA_UDP
261	{
262		.cmd	= TIPC_NL_UDP_GET_REMOTEIP,
263		.validate = GENL_DONT_VALIDATE_STRICT |
264			    GENL_DONT_VALIDATE_DUMP_STRICT,
265		.dumpit	= tipc_udp_nl_dump_remoteip,
266	},
267#endif
268#ifdef CONFIG_TIPC_CRYPTO
269	{
270		.cmd	= TIPC_NL_KEY_SET,
271		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
272		.doit	= tipc_nl_node_set_key,
273	},
274	{
275		.cmd	= TIPC_NL_KEY_FLUSH,
276		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
277		.doit	= tipc_nl_node_flush_key,
278	},
279#endif
280	{
281		.cmd	= TIPC_NL_ADDR_LEGACY_GET,
282		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
283		.doit	= tipc_nl_net_addr_legacy_get,
284	},
285};
286
287struct genl_family tipc_genl_family __ro_after_init = {
288	.name		= TIPC_GENL_V2_NAME,
289	.version	= TIPC_GENL_V2_VERSION,
290	.hdrsize	= 0,
291	.maxattr	= TIPC_NLA_MAX,
292	.policy		= tipc_nl_policy,
293	.netnsok	= true,
294	.module		= THIS_MODULE,
295	.ops		= tipc_genl_v2_ops,
296	.n_ops		= ARRAY_SIZE(tipc_genl_v2_ops),
297	.resv_start_op	= TIPC_NL_ADDR_LEGACY_GET + 1,
298};
299
300int __init tipc_netlink_start(void)
301{
302	int res;
303
304	res = genl_register_family(&tipc_genl_family);
305	if (res) {
306		pr_err("Failed to register netlink interface\n");
307		return res;
308	}
309	return 0;
310}
311
312void tipc_netlink_stop(void)
313{
314	genl_unregister_family(&tipc_genl_family);
315}
316