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
47 static 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
60 const struct nla_policy
61 tipc_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
66 const 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
72 const 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
80 const 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
89 const 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
103 const 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 */
116 const 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
126 const 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
134 const 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
140 const 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 */
151 static 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
287 struct 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
tipc_netlink_start(void)300 int __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
tipc_netlink_stop(void)312 void tipc_netlink_stop(void)
313 {
314 genl_unregister_family(&tipc_genl_family);
315 }
316