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 static const struct netlink_range_validation tipc_nl_mtu_range = { 117 .max = U16_MAX, 118 }; 119 120 const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = { 121 [TIPC_NLA_PROP_UNSPEC] = { .type = NLA_UNSPEC }, 122 [TIPC_NLA_PROP_PRIO] = { .type = NLA_U32 }, 123 [TIPC_NLA_PROP_TOL] = { .type = NLA_U32 }, 124 [TIPC_NLA_PROP_WIN] = { .type = NLA_U32 }, 125 [TIPC_NLA_PROP_MTU] = NLA_POLICY_FULL_RANGE(NLA_U32, &tipc_nl_mtu_range), 126 [TIPC_NLA_PROP_BROADCAST] = { .type = NLA_U32 }, 127 [TIPC_NLA_PROP_BROADCAST_RATIO] = { .type = NLA_U32 } 128 }; 129 130 const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = { 131 [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC }, 132 [TIPC_NLA_BEARER_NAME] = { .type = NLA_NUL_STRING, 133 .len = TIPC_MAX_BEARER_NAME }, 134 [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED }, 135 [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 } 136 }; 137 138 const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = { 139 [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC }, 140 [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING }, 141 [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED } 142 }; 143 144 const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = { 145 [TIPC_NLA_UDP_UNSPEC] = {.type = NLA_UNSPEC}, 146 [TIPC_NLA_UDP_LOCAL] = {.type = NLA_BINARY, 147 .len = sizeof(struct sockaddr_storage)}, 148 [TIPC_NLA_UDP_REMOTE] = {.type = NLA_BINARY, 149 .len = sizeof(struct sockaddr_storage)}, 150 }; 151 152 /* Users of the legacy API (tipc-config) can't handle that we add operations, 153 * so we have a separate genl handling for the new API. 154 */ 155 static const struct genl_ops tipc_genl_v2_ops[] = { 156 { 157 .cmd = TIPC_NL_BEARER_DISABLE, 158 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 159 .flags = GENL_UNS_ADMIN_PERM, 160 .doit = tipc_nl_bearer_disable, 161 }, 162 { 163 .cmd = TIPC_NL_BEARER_ENABLE, 164 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 165 .flags = GENL_UNS_ADMIN_PERM, 166 .doit = tipc_nl_bearer_enable, 167 }, 168 { 169 .cmd = TIPC_NL_BEARER_GET, 170 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 171 .doit = tipc_nl_bearer_get, 172 .dumpit = tipc_nl_bearer_dump, 173 }, 174 { 175 .cmd = TIPC_NL_BEARER_ADD, 176 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 177 .flags = GENL_UNS_ADMIN_PERM, 178 .doit = tipc_nl_bearer_add, 179 }, 180 { 181 .cmd = TIPC_NL_BEARER_SET, 182 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 183 .flags = GENL_UNS_ADMIN_PERM, 184 .doit = tipc_nl_bearer_set, 185 }, 186 { 187 .cmd = TIPC_NL_SOCK_GET, 188 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 189 .start = tipc_dump_start, 190 .dumpit = tipc_nl_sk_dump, 191 .done = tipc_dump_done, 192 }, 193 { 194 .cmd = TIPC_NL_PUBL_GET, 195 .validate = GENL_DONT_VALIDATE_STRICT | 196 GENL_DONT_VALIDATE_DUMP_STRICT, 197 .dumpit = tipc_nl_publ_dump, 198 }, 199 { 200 .cmd = TIPC_NL_LINK_GET, 201 .validate = GENL_DONT_VALIDATE_STRICT, 202 .doit = tipc_nl_node_get_link, 203 .dumpit = tipc_nl_node_dump_link, 204 }, 205 { 206 .cmd = TIPC_NL_LINK_SET, 207 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 208 .flags = GENL_UNS_ADMIN_PERM, 209 .doit = tipc_nl_node_set_link, 210 }, 211 { 212 .cmd = TIPC_NL_LINK_RESET_STATS, 213 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 214 .flags = GENL_UNS_ADMIN_PERM, 215 .doit = tipc_nl_node_reset_link_stats, 216 }, 217 { 218 .cmd = TIPC_NL_MEDIA_GET, 219 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 220 .doit = tipc_nl_media_get, 221 .dumpit = tipc_nl_media_dump, 222 }, 223 { 224 .cmd = TIPC_NL_MEDIA_SET, 225 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 226 .flags = GENL_UNS_ADMIN_PERM, 227 .doit = tipc_nl_media_set, 228 }, 229 { 230 .cmd = TIPC_NL_NODE_GET, 231 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 232 .dumpit = tipc_nl_node_dump, 233 }, 234 { 235 .cmd = TIPC_NL_NET_GET, 236 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 237 .dumpit = tipc_nl_net_dump, 238 }, 239 { 240 .cmd = TIPC_NL_NET_SET, 241 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 242 .flags = GENL_UNS_ADMIN_PERM, 243 .doit = tipc_nl_net_set, 244 }, 245 { 246 .cmd = TIPC_NL_NAME_TABLE_GET, 247 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 248 .dumpit = tipc_nl_name_table_dump, 249 }, 250 { 251 .cmd = TIPC_NL_MON_SET, 252 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 253 .flags = GENL_UNS_ADMIN_PERM, 254 .doit = tipc_nl_node_set_monitor, 255 }, 256 { 257 .cmd = TIPC_NL_MON_GET, 258 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 259 .doit = tipc_nl_node_get_monitor, 260 .dumpit = tipc_nl_node_dump_monitor, 261 }, 262 { 263 .cmd = TIPC_NL_MON_PEER_GET, 264 .validate = GENL_DONT_VALIDATE_STRICT | 265 GENL_DONT_VALIDATE_DUMP_STRICT, 266 .dumpit = tipc_nl_node_dump_monitor_peer, 267 }, 268 { 269 .cmd = TIPC_NL_PEER_REMOVE, 270 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 271 .flags = GENL_UNS_ADMIN_PERM, 272 .doit = tipc_nl_peer_rm, 273 }, 274 #ifdef CONFIG_TIPC_MEDIA_UDP 275 { 276 .cmd = TIPC_NL_UDP_GET_REMOTEIP, 277 .validate = GENL_DONT_VALIDATE_STRICT | 278 GENL_DONT_VALIDATE_DUMP_STRICT, 279 .dumpit = tipc_udp_nl_dump_remoteip, 280 }, 281 #endif 282 #ifdef CONFIG_TIPC_CRYPTO 283 { 284 .cmd = TIPC_NL_KEY_SET, 285 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 286 .flags = GENL_UNS_ADMIN_PERM, 287 .doit = tipc_nl_node_set_key, 288 }, 289 { 290 .cmd = TIPC_NL_KEY_FLUSH, 291 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 292 .flags = GENL_UNS_ADMIN_PERM, 293 .doit = tipc_nl_node_flush_key, 294 }, 295 #endif 296 { 297 .cmd = TIPC_NL_ADDR_LEGACY_GET, 298 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP, 299 .doit = tipc_nl_net_addr_legacy_get, 300 }, 301 }; 302 303 struct genl_family tipc_genl_family __ro_after_init = { 304 .name = TIPC_GENL_V2_NAME, 305 .version = TIPC_GENL_V2_VERSION, 306 .hdrsize = 0, 307 .maxattr = TIPC_NLA_MAX, 308 .policy = tipc_nl_policy, 309 .netnsok = true, 310 .module = THIS_MODULE, 311 .ops = tipc_genl_v2_ops, 312 .n_ops = ARRAY_SIZE(tipc_genl_v2_ops), 313 .resv_start_op = TIPC_NL_ADDR_LEGACY_GET + 1, 314 }; 315 316 int __init tipc_netlink_start(void) 317 { 318 int res; 319 320 res = genl_register_family(&tipc_genl_family); 321 if (res) { 322 pr_err("Failed to register netlink interface\n"); 323 return res; 324 } 325 return 0; 326 } 327 328 void tipc_netlink_stop(void) 329 { 330 genl_unregister_family(&tipc_genl_family); 331 } 332