Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1 | /* |
| 2 | * ip/ip6_neighbor.c: IP6 neighbor handling |
| 3 | * |
| 4 | * Copyright (c) 2010 Cisco and/or its affiliates. |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at: |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include <vnet/ip6-nd/ip6_ra.h> |
| 19 | |
| 20 | #include <vnet/ip/ip.h> |
| 21 | #include <vnet/ip-neighbor/ip_neighbor_dp.h> |
| 22 | |
| 23 | #include <vnet/fib/ip6_fib.h> |
| 24 | #include <vnet/ip/ip6_link.h> |
| 25 | |
| 26 | /** |
| 27 | * @file |
| 28 | * @brief IPv6 Router Advertisements. |
| 29 | * |
| 30 | * The files contains the API and CLI code for managing IPv6 RAs |
| 31 | */ |
| 32 | |
| 33 | /* *INDENT-OFF* */ |
| 34 | /* Router solicitation packet format for ethernet. */ |
| 35 | typedef CLIB_PACKED (struct |
| 36 | { |
| 37 | ip6_header_t ip; |
| 38 | icmp6_neighbor_discovery_header_t neighbor; |
| 39 | icmp6_neighbor_discovery_ethernet_link_layer_address_option_t |
| 40 | link_layer_option; |
| 41 | }) icmp6_router_solicitation_header_t; |
| 42 | |
| 43 | /* router advertisement packet format for ethernet. */ |
| 44 | typedef CLIB_PACKED (struct |
| 45 | { |
| 46 | ip6_header_t ip; |
| 47 | icmp6_router_advertisement_header_t router; |
| 48 | icmp6_neighbor_discovery_ethernet_link_layer_address_option_t |
| 49 | link_layer_option; |
| 50 | icmp6_neighbor_discovery_mtu_option_t mtu_option; |
| 51 | icmp6_neighbor_discovery_prefix_information_option_t |
| 52 | prefix[0]; |
| 53 | }) icmp6_router_advertisement_packet_t; |
| 54 | /* *INDENT-ON* */ |
| 55 | |
| 56 | #define DEF_MAX_RADV_INTERVAL 200 |
| 57 | #define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL |
| 58 | #define DEF_CURR_HOP_LIMIT 64 |
| 59 | #define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL |
| 60 | #define MAX_DEF_RTR_LIFETIME 9000 |
| 61 | |
| 62 | #define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */ |
| 63 | #define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */ |
| 64 | #define MIN_DELAY_BETWEEN_RAS 3 /* seconds */ |
| 65 | #define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */ |
| 66 | #define MAX_RA_DELAY_TIME .5 /* seconds */ |
| 67 | |
| 68 | /* advertised prefix option */ |
| 69 | typedef struct |
| 70 | { |
| 71 | /* basic advertised information */ |
| 72 | ip6_address_t prefix; |
| 73 | u8 prefix_len; |
| 74 | int adv_on_link_flag; |
| 75 | int adv_autonomous_flag; |
| 76 | u32 adv_valid_lifetime_in_secs; |
| 77 | u32 adv_pref_lifetime_in_secs; |
| 78 | |
| 79 | /* advertised values are computed from these times if decrementing */ |
| 80 | f64 valid_lifetime_expires; |
| 81 | f64 pref_lifetime_expires; |
| 82 | |
| 83 | /* local information */ |
| 84 | int enabled; |
| 85 | int deprecated_prefix_flag; |
| 86 | int decrement_lifetime_flag; |
| 87 | |
| 88 | #define MIN_ADV_VALID_LIFETIME 7203 /* seconds */ |
| 89 | #define DEF_ADV_VALID_LIFETIME 2592000 |
| 90 | #define DEF_ADV_PREF_LIFETIME 604800 |
| 91 | |
| 92 | /* extensions are added here, mobile, DNS etc.. */ |
| 93 | } ip6_radv_prefix_t; |
| 94 | |
| 95 | typedef struct ip6_ra_t_ |
| 96 | { |
| 97 | /* advertised config information, zero means unspecified */ |
| 98 | u8 curr_hop_limit; |
| 99 | int adv_managed_flag; |
| 100 | int adv_other_flag; |
| 101 | u16 adv_router_lifetime_in_sec; |
| 102 | u32 adv_neighbor_reachable_time_in_msec; |
| 103 | u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations; |
| 104 | |
| 105 | /* mtu option */ |
| 106 | u32 adv_link_mtu; |
| 107 | |
| 108 | /* local information */ |
| 109 | u32 sw_if_index; |
| 110 | int send_radv; /* radv on/off on this interface - set by config */ |
| 111 | int cease_radv; /* we are ceasing to send - set byf config */ |
| 112 | int send_unicast; |
| 113 | int adv_link_layer_address; |
| 114 | int prefix_option; |
| 115 | int failed_device_check; |
| 116 | int ref_count; |
| 117 | |
| 118 | /* prefix option */ |
| 119 | ip6_radv_prefix_t *adv_prefixes_pool; |
| 120 | |
| 121 | /* Hash table mapping address to index in interface advertised prefix pool. */ |
| 122 | mhash_t address_to_prefix_index; |
| 123 | |
| 124 | f64 max_radv_interval; |
| 125 | f64 min_radv_interval; |
| 126 | f64 min_delay_between_radv; |
| 127 | f64 max_delay_between_radv; |
| 128 | f64 max_rtr_default_lifetime; |
| 129 | |
| 130 | f64 last_radv_time; |
| 131 | f64 last_multicast_time; |
| 132 | f64 next_multicast_time; |
| 133 | |
| 134 | |
| 135 | u32 initial_adverts_count; |
| 136 | f64 initial_adverts_interval; |
| 137 | u32 initial_adverts_sent; |
| 138 | |
| 139 | /* stats */ |
| 140 | u32 n_advertisements_sent; |
| 141 | u32 n_solicitations_rcvd; |
| 142 | u32 n_solicitations_dropped; |
| 143 | |
| 144 | /* router solicitations sending state */ |
| 145 | u8 keep_sending_rs; /* when true then next fields are valid */ |
| 146 | icmp6_send_router_solicitation_params_t params; |
| 147 | f64 sleep_interval; |
| 148 | f64 due_time; |
| 149 | u32 n_left; |
| 150 | f64 start_time; |
| 151 | vlib_buffer_t *buffer; |
| 152 | |
| 153 | u32 seed; |
| 154 | |
| 155 | } ip6_ra_t; |
| 156 | |
| 157 | static ip6_link_delegate_id_t ip6_ra_delegate_id; |
| 158 | static ip6_ra_t *ip6_ra_pool; |
| 159 | |
| 160 | |
| 161 | /* vector of registered RA report listeners */ |
| 162 | static ip6_ra_report_notify_t *ip6_ra_listeners; |
| 163 | |
| 164 | static int ip6_ra_publish (ip6_ra_report_t * r); |
| 165 | |
| 166 | void |
| 167 | ip6_ra_report_register (ip6_ra_report_notify_t fn) |
| 168 | { |
| 169 | ip6_ra_report_notify_t *listener; |
| 170 | vec_foreach (listener, ip6_ra_listeners) |
| 171 | { |
| 172 | if (*listener == fn) |
| 173 | return; |
| 174 | } |
| 175 | |
| 176 | vec_add1 (ip6_ra_listeners, fn); |
| 177 | } |
| 178 | |
| 179 | void |
| 180 | ip6_ra_report_unregister (ip6_ra_report_notify_t fn) |
| 181 | { |
| 182 | u32 ii; |
| 183 | |
| 184 | vec_foreach_index (ii, ip6_ra_listeners) |
| 185 | { |
| 186 | if (ip6_ra_listeners[ii] == fn) |
| 187 | { |
| 188 | vec_del1 (ip6_ra_listeners, ii); |
| 189 | break; |
| 190 | } |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | static inline ip6_ra_t * |
| 195 | ip6_ra_get_itf (u32 sw_if_index) |
| 196 | { |
| 197 | index_t rai; |
| 198 | |
| 199 | rai = ip6_link_delegate_get (sw_if_index, ip6_ra_delegate_id); |
| 200 | |
| 201 | if (INDEX_INVALID != rai) |
| 202 | return (pool_elt_at_index (ip6_ra_pool, rai)); |
| 203 | |
| 204 | return (NULL); |
| 205 | } |
| 206 | |
| 207 | /* for "syslogging" - use elog for now */ |
| 208 | #define foreach_log_level \ |
| 209 | _ (DEBUG, "DEBUG") \ |
| 210 | _ (INFO, "INFORMATION") \ |
| 211 | _ (NOTICE, "NOTICE") \ |
| 212 | _ (WARNING, "WARNING") \ |
| 213 | _ (ERR, "ERROR") \ |
| 214 | _ (CRIT, "CRITICAL") \ |
| 215 | _ (ALERT, "ALERT") \ |
| 216 | _ (EMERG, "EMERGENCY") |
| 217 | |
| 218 | typedef enum |
| 219 | { |
| 220 | #define _(f,s) LOG_##f, |
| 221 | foreach_log_level |
| 222 | #undef _ |
| 223 | } log_level_t; |
| 224 | |
| 225 | static char *log_level_strings[] = { |
| 226 | #define _(f,s) s, |
| 227 | foreach_log_level |
| 228 | #undef _ |
| 229 | }; |
| 230 | |
| 231 | static int logmask = 1 << LOG_DEBUG; |
| 232 | |
| 233 | static void |
| 234 | ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...) |
| 235 | { |
| 236 | /* just use elog for now */ |
| 237 | u8 *what; |
| 238 | va_list va; |
| 239 | |
| 240 | if ((priority > LOG_EMERG) || !(logmask & (1 << priority))) |
| 241 | return; |
| 242 | |
| 243 | va_start (va, fmt); |
| 244 | if (fmt) |
| 245 | { |
| 246 | what = va_format (0, fmt, &va); |
| 247 | |
| 248 | ELOG_TYPE_DECLARE (e) = |
| 249 | { |
| 250 | .format = "ip6 nd: (%s): %s",.format_args = "T4T4",}; |
| 251 | struct |
| 252 | { |
| 253 | u32 s[2]; |
| 254 | } *ed; |
| 255 | ed = ELOG_DATA (&vm->elog_main, e); |
| 256 | ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]); |
| 257 | ed->s[1] = elog_string (&vm->elog_main, (char *) what); |
| 258 | } |
| 259 | va_end (va); |
| 260 | return; |
| 261 | } |
| 262 | |
| 263 | /* ipv6 neighbor discovery - router advertisements */ |
| 264 | typedef enum |
| 265 | { |
| 266 | ICMP6_ROUTER_SOLICITATION_NEXT_DROP, |
| 267 | ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW, |
| 268 | ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX, |
| 269 | ICMP6_ROUTER_SOLICITATION_N_NEXT, |
| 270 | } icmp6_router_solicitation_or_advertisement_next_t; |
| 271 | |
| 272 | static_always_inline uword |
| 273 | icmp6_router_solicitation (vlib_main_t * vm, |
| 274 | vlib_node_runtime_t * node, vlib_frame_t * frame) |
| 275 | { |
| 276 | vnet_main_t *vnm = vnet_get_main (); |
| 277 | ip6_main_t *im = &ip6_main; |
| 278 | uword n_packets = frame->n_vectors; |
| 279 | u32 *from, *to_next; |
| 280 | u32 n_left_from, n_left_to_next, next_index; |
| 281 | u32 n_advertisements_sent = 0; |
| 282 | int bogus_length; |
| 283 | |
| 284 | icmp6_neighbor_discovery_option_type_t option_type; |
| 285 | |
| 286 | vlib_node_runtime_t *error_node = |
| 287 | vlib_node_get_runtime (vm, ip6_icmp_input_node.index); |
| 288 | |
| 289 | from = vlib_frame_vector_args (frame); |
| 290 | n_left_from = n_packets; |
| 291 | next_index = node->cached_next_index; |
| 292 | |
| 293 | if (node->flags & VLIB_NODE_FLAG_TRACE) |
| 294 | vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, |
| 295 | /* stride */ 1, |
| 296 | sizeof (icmp6_input_trace_t)); |
| 297 | |
| 298 | /* source may append his LL address */ |
| 299 | option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address; |
| 300 | |
| 301 | while (n_left_from > 0) |
| 302 | { |
| 303 | vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); |
| 304 | |
| 305 | while (n_left_from > 0 && n_left_to_next > 0) |
| 306 | { |
| 307 | vlib_buffer_t *p0; |
| 308 | ip6_header_t *ip0; |
| 309 | ip6_ra_t *radv_info = NULL; |
| 310 | |
| 311 | icmp6_neighbor_discovery_header_t *h0; |
| 312 | icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0; |
| 313 | |
| 314 | u32 bi0, options_len0, sw_if_index0, next0, error0; |
| 315 | u32 is_solicitation = 1, is_dropped = 0; |
| 316 | u32 is_unspecified, is_link_local; |
| 317 | |
| 318 | bi0 = to_next[0] = from[0]; |
| 319 | |
| 320 | from += 1; |
| 321 | to_next += 1; |
| 322 | n_left_from -= 1; |
| 323 | n_left_to_next -= 1; |
| 324 | |
| 325 | p0 = vlib_get_buffer (vm, bi0); |
| 326 | ip0 = vlib_buffer_get_current (p0); |
| 327 | h0 = ip6_next_header (ip0); |
| 328 | options_len0 = |
| 329 | clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]); |
| 330 | is_unspecified = ip6_address_is_unspecified (&ip0->src_address); |
| 331 | is_link_local = |
| 332 | ip6_address_is_link_local_unicast (&ip0->src_address); |
| 333 | |
| 334 | error0 = ICMP6_ERROR_NONE; |
| 335 | sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX]; |
| 336 | |
| 337 | /* check if solicitation (not from nd_timer node) */ |
| 338 | if (ip6_address_is_unspecified (&ip0->dst_address)) |
| 339 | is_solicitation = 0; |
| 340 | |
| 341 | /* Check that source address is unspecified, link-local or else on-link. */ |
| 342 | if (!is_unspecified && !is_link_local) |
| 343 | { |
| 344 | u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0); |
| 345 | |
| 346 | if (ADJ_INDEX_INVALID != src_adj_index0) |
| 347 | { |
| 348 | ip_adjacency_t *adj0 = adj_get (src_adj_index0); |
| 349 | |
| 350 | error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0 |
| 351 | ? |
| 352 | ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK |
| 353 | : error0); |
| 354 | } |
| 355 | else |
| 356 | { |
| 357 | error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK; |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | /* check for source LL option and process */ |
| 362 | o0 = (void *) (h0 + 1); |
| 363 | o0 = ((options_len0 == 8 |
| 364 | && o0->header.type == option_type |
| 365 | && o0->header.n_data_u64s == 1) ? o0 : 0); |
| 366 | |
| 367 | /* if src address unspecified IGNORE any options */ |
| 368 | if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 && |
| 369 | !is_unspecified && !is_link_local)) |
| 370 | { |
Neale Ranns | dc617b8 | 2020-08-20 08:22:56 +0000 | [diff] [blame] | 371 | /* *INDENT-OFF* */ |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 372 | ip_neighbor_learn_t learn = { |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 373 | .sw_if_index = sw_if_index0, |
Neale Ranns | dc617b8 | 2020-08-20 08:22:56 +0000 | [diff] [blame] | 374 | .ip = { |
| 375 | .ip.ip6 = ip0->src_address, |
| 376 | .version = AF_IP6, |
| 377 | }, |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 378 | }; |
Neale Ranns | dc617b8 | 2020-08-20 08:22:56 +0000 | [diff] [blame] | 379 | /* *INDENT-ON* */ |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 380 | memcpy (&learn.mac, o0->ethernet_address, sizeof (learn.mac)); |
| 381 | ip_neighbor_learn_dp (&learn); |
| 382 | } |
| 383 | |
| 384 | /* default is to drop */ |
| 385 | next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP; |
| 386 | |
| 387 | if (error0 == ICMP6_ERROR_NONE) |
| 388 | { |
| 389 | vnet_sw_interface_t *sw_if0; |
| 390 | ethernet_interface_t *eth_if0; |
| 391 | u32 adj_index0; |
| 392 | |
| 393 | sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0); |
| 394 | ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE); |
| 395 | eth_if0 = |
| 396 | ethernet_get_interface (ðernet_main, sw_if0->hw_if_index); |
| 397 | |
| 398 | /* only support ethernet interface type for now */ |
| 399 | error0 = |
| 400 | (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF |
| 401 | : error0; |
| 402 | |
| 403 | if (error0 == ICMP6_ERROR_NONE) |
| 404 | { |
| 405 | /* adjust the sizeof the buffer to just include the ipv6 header */ |
| 406 | p0->current_length -= |
| 407 | (options_len0 + |
| 408 | sizeof (icmp6_neighbor_discovery_header_t)); |
| 409 | |
| 410 | radv_info = ip6_ra_get_itf (sw_if_index0); |
| 411 | |
| 412 | error0 = ((!radv_info) ? |
| 413 | ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG : |
| 414 | error0); |
| 415 | |
| 416 | if (error0 == ICMP6_ERROR_NONE) |
| 417 | { |
| 418 | f64 now = vlib_time_now (vm); |
| 419 | |
| 420 | /* for solicited adverts - need to rate limit */ |
| 421 | if (is_solicitation) |
| 422 | { |
| 423 | if (0 != radv_info->last_radv_time && |
| 424 | (now - radv_info->last_radv_time) < |
| 425 | MIN_DELAY_BETWEEN_RAS) |
| 426 | is_dropped = 1; |
| 427 | else |
| 428 | radv_info->last_radv_time = now; |
| 429 | } |
| 430 | |
| 431 | /* send now */ |
| 432 | icmp6_router_advertisement_header_t rh; |
| 433 | |
| 434 | rh.icmp.type = ICMP6_router_advertisement; |
| 435 | rh.icmp.code = 0; |
| 436 | rh.icmp.checksum = 0; |
| 437 | |
| 438 | rh.current_hop_limit = radv_info->curr_hop_limit; |
| 439 | rh.router_lifetime_in_sec = |
| 440 | clib_host_to_net_u16 |
| 441 | (radv_info->adv_router_lifetime_in_sec); |
| 442 | rh. |
| 443 | time_in_msec_between_retransmitted_neighbor_solicitations |
| 444 | = |
| 445 | clib_host_to_net_u32 (radv_info-> |
| 446 | adv_time_in_msec_between_retransmitted_neighbor_solicitations); |
| 447 | rh.neighbor_reachable_time_in_msec = |
| 448 | clib_host_to_net_u32 (radv_info-> |
| 449 | adv_neighbor_reachable_time_in_msec); |
| 450 | |
| 451 | rh.flags = |
| 452 | (radv_info->adv_managed_flag) ? |
| 453 | ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP : |
| 454 | 0; |
| 455 | rh.flags |= |
| 456 | ((radv_info->adv_other_flag) ? |
| 457 | ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP : |
| 458 | 0); |
| 459 | |
| 460 | |
| 461 | u16 payload_length = |
| 462 | sizeof (icmp6_router_advertisement_header_t); |
| 463 | |
| 464 | if (vlib_buffer_add_data |
| 465 | (vm, &bi0, (void *) &rh, |
| 466 | sizeof (icmp6_router_advertisement_header_t))) |
| 467 | { |
| 468 | /* buffer allocation failed, drop the pkt */ |
| 469 | error0 = ICMP6_ERROR_ALLOC_FAILURE; |
| 470 | goto drop0; |
| 471 | } |
| 472 | |
| 473 | if (radv_info->adv_link_layer_address) |
| 474 | { |
| 475 | icmp6_neighbor_discovery_ethernet_link_layer_address_option_t |
| 476 | h; |
| 477 | |
| 478 | h.header.type = |
| 479 | ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address; |
| 480 | h.header.n_data_u64s = 1; |
| 481 | |
| 482 | /* copy ll address */ |
| 483 | clib_memcpy (&h.ethernet_address[0], |
Benoît Ganne | b44c77d | 2020-10-20 16:24:17 +0200 | [diff] [blame] | 484 | ð_if0->address, 6); |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 485 | |
| 486 | if (vlib_buffer_add_data |
| 487 | (vm, &bi0, (void *) &h, |
| 488 | sizeof |
| 489 | (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t))) |
| 490 | { |
| 491 | error0 = ICMP6_ERROR_ALLOC_FAILURE; |
| 492 | goto drop0; |
| 493 | } |
| 494 | |
| 495 | payload_length += |
| 496 | sizeof |
| 497 | (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t); |
| 498 | } |
| 499 | |
| 500 | /* add MTU option */ |
| 501 | if (radv_info->adv_link_mtu) |
| 502 | { |
| 503 | icmp6_neighbor_discovery_mtu_option_t h; |
| 504 | |
| 505 | h.unused = 0; |
| 506 | h.mtu = |
| 507 | clib_host_to_net_u32 (radv_info->adv_link_mtu); |
| 508 | h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu; |
| 509 | h.header.n_data_u64s = 1; |
| 510 | |
| 511 | payload_length += |
| 512 | sizeof (icmp6_neighbor_discovery_mtu_option_t); |
| 513 | |
| 514 | if (vlib_buffer_add_data |
| 515 | (vm, &bi0, (void *) &h, |
| 516 | sizeof |
| 517 | (icmp6_neighbor_discovery_mtu_option_t))) |
| 518 | { |
| 519 | error0 = ICMP6_ERROR_ALLOC_FAILURE; |
| 520 | goto drop0; |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | /* add advertised prefix options */ |
| 525 | ip6_radv_prefix_t *pr_info; |
| 526 | |
| 527 | /* *INDENT-OFF* */ |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame^] | 528 | pool_foreach (pr_info, radv_info->adv_prefixes_pool) |
| 529 | { |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 530 | if(pr_info->enabled && |
| 531 | (!pr_info->decrement_lifetime_flag |
| 532 | || (pr_info->pref_lifetime_expires >0))) |
| 533 | { |
| 534 | /* advertise this prefix */ |
| 535 | icmp6_neighbor_discovery_prefix_information_option_t h; |
| 536 | |
| 537 | h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information; |
| 538 | h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3); |
| 539 | |
| 540 | h.dst_address_length = pr_info->prefix_len; |
| 541 | |
| 542 | h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0; |
| 543 | h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0; |
| 544 | |
| 545 | if(radv_info->cease_radv && pr_info->deprecated_prefix_flag) |
| 546 | { |
| 547 | h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME); |
| 548 | h.preferred_time = 0; |
| 549 | } |
| 550 | else |
| 551 | { |
| 552 | if(pr_info->decrement_lifetime_flag) |
| 553 | { |
| 554 | pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ? |
| 555 | (pr_info->valid_lifetime_expires - now) : 0; |
| 556 | |
| 557 | pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ? |
| 558 | (pr_info->pref_lifetime_expires - now) : 0; |
| 559 | } |
| 560 | |
| 561 | h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs); |
| 562 | h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ; |
| 563 | } |
| 564 | h.unused = 0; |
| 565 | |
Dave Barach | d158696 | 2020-02-20 16:17:58 -0500 | [diff] [blame] | 566 | /* Handy for debugging, but too noisy... */ |
| 567 | if (0 && CLIB_DEBUG > 0) |
| 568 | clib_warning |
| 569 | ("send RA for prefix %U/%d " |
| 570 | "sw_if_index %d valid %u preferred %u", |
| 571 | format_ip6_address, &pr_info->prefix, |
| 572 | pr_info->prefix_len, sw_if_index0, |
| 573 | clib_net_to_host_u32 (h.valid_time), |
| 574 | clib_net_to_host_u32 (h.preferred_time)); |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 575 | |
| 576 | if (h.valid_time == 0) |
Dave Barach | d158696 | 2020-02-20 16:17:58 -0500 | [diff] [blame] | 577 | clib_warning ("BUG: send RA with valid_time 0"); |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 578 | |
| 579 | clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t)); |
| 580 | |
| 581 | payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t); |
| 582 | |
| 583 | if (vlib_buffer_add_data |
| 584 | (vm, &bi0, (void *)&h, |
| 585 | sizeof(icmp6_neighbor_discovery_prefix_information_option_t))) |
| 586 | { |
| 587 | error0 = ICMP6_ERROR_ALLOC_FAILURE; |
| 588 | goto drop0; |
| 589 | } |
| 590 | |
| 591 | } |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame^] | 592 | } |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 593 | /* *INDENT-ON* */ |
| 594 | |
| 595 | /* add additional options before here */ |
| 596 | |
| 597 | /* finish building the router advertisement... */ |
| 598 | if (!is_unspecified && radv_info->send_unicast) |
| 599 | { |
| 600 | ip0->dst_address = ip0->src_address; |
| 601 | } |
| 602 | else |
| 603 | { |
| 604 | /* target address is all-nodes mcast addr */ |
| 605 | ip6_set_reserved_multicast_address |
| 606 | (&ip0->dst_address, |
| 607 | IP6_MULTICAST_SCOPE_link_local, |
| 608 | IP6_MULTICAST_GROUP_ID_all_hosts); |
| 609 | } |
| 610 | |
| 611 | /* source address MUST be the link-local address */ |
| 612 | ip6_address_copy (&ip0->src_address, |
| 613 | ip6_get_link_local_address |
| 614 | (radv_info->sw_if_index)); |
| 615 | |
| 616 | ip0->hop_limit = 255; |
| 617 | ip0->payload_length = |
| 618 | clib_host_to_net_u16 (payload_length); |
| 619 | |
| 620 | icmp6_router_advertisement_header_t *rh0 = |
| 621 | (icmp6_router_advertisement_header_t *) (ip0 + 1); |
| 622 | rh0->icmp.checksum = |
| 623 | ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, |
| 624 | &bogus_length); |
| 625 | ASSERT (bogus_length == 0); |
| 626 | |
| 627 | /* setup output if and adjacency */ |
| 628 | vnet_buffer (p0)->sw_if_index[VLIB_RX] = |
| 629 | vnet_main.local_interface_sw_if_index; |
| 630 | |
| 631 | if (is_solicitation) |
| 632 | { |
| 633 | ethernet_header_t *eth0; |
| 634 | /* Reuse current MAC header, copy SMAC to DMAC and |
| 635 | * interface MAC to SMAC */ |
| 636 | vlib_buffer_reset (p0); |
| 637 | eth0 = vlib_buffer_get_current (p0); |
| 638 | clib_memcpy (eth0->dst_address, eth0->src_address, |
| 639 | 6); |
Benoît Ganne | b44c77d | 2020-10-20 16:24:17 +0200 | [diff] [blame] | 640 | clib_memcpy (eth0->src_address, ð_if0->address, |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 641 | 6); |
| 642 | next0 = |
| 643 | is_dropped ? next0 : |
| 644 | ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX; |
| 645 | vnet_buffer (p0)->sw_if_index[VLIB_TX] = |
| 646 | sw_if_index0; |
| 647 | } |
| 648 | else |
| 649 | { |
| 650 | adj_index0 = ip6_link_get_mcast_adj (sw_if_index0); |
| 651 | if (adj_index0 == INDEX_INVALID) |
| 652 | error0 = ICMP6_ERROR_DST_LOOKUP_MISS; |
| 653 | else |
| 654 | { |
| 655 | next0 = |
| 656 | is_dropped ? next0 : |
| 657 | ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW; |
| 658 | vnet_buffer (p0)->ip.adj_index[VLIB_TX] = |
| 659 | adj_index0; |
| 660 | } |
| 661 | } |
| 662 | p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; |
| 663 | |
| 664 | radv_info->n_solicitations_dropped += is_dropped; |
| 665 | radv_info->n_solicitations_rcvd += is_solicitation; |
| 666 | |
| 667 | if ((error0 == ICMP6_ERROR_NONE) && !is_dropped) |
| 668 | { |
| 669 | radv_info->n_advertisements_sent++; |
| 670 | n_advertisements_sent++; |
| 671 | } |
| 672 | } |
| 673 | } |
| 674 | } |
| 675 | |
| 676 | drop0: |
| 677 | p0->error = error_node->errors[error0]; |
| 678 | |
| 679 | if (error0 != ICMP6_ERROR_NONE) |
| 680 | vlib_error_count (vm, error_node->node_index, error0, 1); |
| 681 | |
| 682 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| 683 | to_next, n_left_to_next, |
| 684 | bi0, next0); |
| 685 | |
| 686 | } |
| 687 | |
| 688 | vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| 689 | } |
| 690 | |
| 691 | /* Account for router advertisements sent. */ |
| 692 | vlib_error_count (vm, error_node->node_index, |
| 693 | ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX, |
| 694 | n_advertisements_sent); |
| 695 | |
| 696 | return frame->n_vectors; |
| 697 | } |
| 698 | |
| 699 | /* *INDENT-OFF* */ |
| 700 | VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) = |
| 701 | { |
| 702 | .function = icmp6_router_solicitation, |
| 703 | .name = "icmp6-router-solicitation", |
| 704 | |
| 705 | .vector_size = sizeof (u32), |
| 706 | |
| 707 | .format_trace = format_icmp6_input_trace, |
| 708 | |
| 709 | .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT, |
| 710 | .next_nodes = { |
| 711 | [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop", |
| 712 | [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast", |
| 713 | [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output", |
| 714 | }, |
| 715 | }; |
| 716 | /* *INDENT-ON* */ |
| 717 | |
| 718 | /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */ |
| 719 | static_always_inline uword |
| 720 | icmp6_router_advertisement (vlib_main_t * vm, |
| 721 | vlib_node_runtime_t * node, vlib_frame_t * frame) |
| 722 | { |
| 723 | vnet_main_t *vnm = vnet_get_main (); |
| 724 | uword n_packets = frame->n_vectors; |
| 725 | u32 *from, *to_next; |
| 726 | u32 n_left_from, n_left_to_next, next_index; |
| 727 | u32 n_advertisements_rcvd = 0; |
| 728 | |
| 729 | vlib_node_runtime_t *error_node = |
| 730 | vlib_node_get_runtime (vm, ip6_icmp_input_node.index); |
| 731 | |
| 732 | from = vlib_frame_vector_args (frame); |
| 733 | n_left_from = n_packets; |
| 734 | next_index = node->cached_next_index; |
| 735 | |
| 736 | if (node->flags & VLIB_NODE_FLAG_TRACE) |
| 737 | vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, |
| 738 | /* stride */ 1, |
| 739 | sizeof (icmp6_input_trace_t)); |
| 740 | |
| 741 | while (n_left_from > 0) |
| 742 | { |
| 743 | vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); |
| 744 | |
| 745 | while (n_left_from > 0 && n_left_to_next > 0) |
| 746 | { |
| 747 | vlib_buffer_t *p0; |
| 748 | ip6_header_t *ip0; |
| 749 | ip6_ra_t *radv_info = 0; |
| 750 | icmp6_router_advertisement_header_t *h0; |
| 751 | u32 bi0, options_len0, sw_if_index0, next0, error0; |
| 752 | |
| 753 | bi0 = to_next[0] = from[0]; |
| 754 | |
| 755 | from += 1; |
| 756 | to_next += 1; |
| 757 | n_left_from -= 1; |
| 758 | n_left_to_next -= 1; |
| 759 | |
| 760 | p0 = vlib_get_buffer (vm, bi0); |
| 761 | ip0 = vlib_buffer_get_current (p0); |
| 762 | h0 = ip6_next_header (ip0); |
| 763 | options_len0 = |
| 764 | clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]); |
| 765 | |
| 766 | error0 = ICMP6_ERROR_NONE; |
| 767 | sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX]; |
| 768 | |
| 769 | /* Check that source address is link-local */ |
| 770 | error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ? |
| 771 | ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0; |
| 772 | |
| 773 | /* default is to drop */ |
| 774 | next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP; |
| 775 | |
| 776 | n_advertisements_rcvd++; |
| 777 | |
| 778 | if (error0 == ICMP6_ERROR_NONE) |
| 779 | { |
| 780 | vnet_sw_interface_t *sw_if0; |
| 781 | ethernet_interface_t *eth_if0; |
| 782 | |
| 783 | sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0); |
| 784 | ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE); |
| 785 | eth_if0 = |
| 786 | ethernet_get_interface (ðernet_main, sw_if0->hw_if_index); |
| 787 | |
| 788 | /* only support ethernet interface type for now */ |
| 789 | error0 = |
| 790 | (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF |
| 791 | : error0; |
| 792 | |
| 793 | if (error0 == ICMP6_ERROR_NONE) |
| 794 | { |
| 795 | /* look up the radv_t information for this interface */ |
| 796 | radv_info = ip6_ra_get_itf (sw_if_index0); |
| 797 | |
| 798 | error0 = ((!radv_info) ? |
| 799 | ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG : |
| 800 | error0); |
| 801 | |
| 802 | if (error0 == ICMP6_ERROR_NONE) |
| 803 | { |
| 804 | radv_info->keep_sending_rs = 0; |
| 805 | |
| 806 | ip6_ra_report_t r; |
| 807 | |
| 808 | r.sw_if_index = sw_if_index0; |
| 809 | memcpy (&r.router_address, &ip0->src_address, 16); |
| 810 | r.current_hop_limit = h0->current_hop_limit; |
| 811 | r.flags = h0->flags; |
| 812 | r.router_lifetime_in_sec = |
| 813 | clib_net_to_host_u16 (h0->router_lifetime_in_sec); |
| 814 | r.neighbor_reachable_time_in_msec = |
| 815 | clib_net_to_host_u32 |
| 816 | (h0->neighbor_reachable_time_in_msec); |
| 817 | r.time_in_msec_between_retransmitted_neighbor_solicitations = clib_net_to_host_u32 (h0->time_in_msec_between_retransmitted_neighbor_solicitations); |
| 818 | r.prefixes = 0; |
| 819 | |
| 820 | /* validate advertised information */ |
| 821 | if ((h0->current_hop_limit && radv_info->curr_hop_limit) |
| 822 | && (h0->current_hop_limit != |
| 823 | radv_info->curr_hop_limit)) |
| 824 | { |
| 825 | ip6_neighbor_syslog (vm, LOG_WARNING, |
| 826 | "our AdvCurHopLimit on %U doesn't agree with %U", |
| 827 | format_vnet_sw_if_index_name, |
| 828 | vnm, sw_if_index0, |
| 829 | format_ip6_address, |
| 830 | &ip0->src_address); |
| 831 | } |
| 832 | |
| 833 | if ((h0->flags & |
| 834 | ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP) |
| 835 | != radv_info->adv_managed_flag) |
| 836 | { |
| 837 | ip6_neighbor_syslog (vm, LOG_WARNING, |
| 838 | "our AdvManagedFlag on %U doesn't agree with %U", |
| 839 | format_vnet_sw_if_index_name, |
| 840 | vnm, sw_if_index0, |
| 841 | format_ip6_address, |
| 842 | &ip0->src_address); |
| 843 | } |
| 844 | |
| 845 | if ((h0->flags & |
| 846 | ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP) |
| 847 | != radv_info->adv_other_flag) |
| 848 | { |
| 849 | ip6_neighbor_syslog (vm, LOG_WARNING, |
| 850 | "our AdvOtherConfigFlag on %U doesn't agree with %U", |
| 851 | format_vnet_sw_if_index_name, |
| 852 | vnm, sw_if_index0, |
| 853 | format_ip6_address, |
| 854 | &ip0->src_address); |
| 855 | } |
| 856 | |
| 857 | if ((h0-> |
| 858 | time_in_msec_between_retransmitted_neighbor_solicitations |
| 859 | && radv_info-> |
| 860 | adv_time_in_msec_between_retransmitted_neighbor_solicitations) |
| 861 | && (h0-> |
| 862 | time_in_msec_between_retransmitted_neighbor_solicitations |
| 863 | != |
| 864 | clib_host_to_net_u32 (radv_info-> |
| 865 | adv_time_in_msec_between_retransmitted_neighbor_solicitations))) |
| 866 | { |
| 867 | ip6_neighbor_syslog (vm, LOG_WARNING, |
| 868 | "our AdvRetransTimer on %U doesn't agree with %U", |
| 869 | format_vnet_sw_if_index_name, |
| 870 | vnm, sw_if_index0, |
| 871 | format_ip6_address, |
| 872 | &ip0->src_address); |
| 873 | } |
| 874 | |
| 875 | if ((h0->neighbor_reachable_time_in_msec && |
| 876 | radv_info->adv_neighbor_reachable_time_in_msec) && |
| 877 | (h0->neighbor_reachable_time_in_msec != |
| 878 | clib_host_to_net_u32 |
| 879 | (radv_info->adv_neighbor_reachable_time_in_msec))) |
| 880 | { |
| 881 | ip6_neighbor_syslog (vm, LOG_WARNING, |
| 882 | "our AdvReachableTime on %U doesn't agree with %U", |
| 883 | format_vnet_sw_if_index_name, |
| 884 | vnm, sw_if_index0, |
| 885 | format_ip6_address, |
| 886 | &ip0->src_address); |
| 887 | } |
| 888 | |
| 889 | /* check for MTU or prefix options or .. */ |
| 890 | u8 *opt_hdr = (u8 *) (h0 + 1); |
| 891 | while (options_len0 > 0) |
| 892 | { |
| 893 | icmp6_neighbor_discovery_option_header_t *o0 = |
| 894 | (icmp6_neighbor_discovery_option_header_t *) |
| 895 | opt_hdr; |
| 896 | int opt_len = o0->n_data_u64s << 3; |
| 897 | icmp6_neighbor_discovery_option_type_t option_type = |
| 898 | o0->type; |
| 899 | |
| 900 | if (options_len0 < 2) |
| 901 | { |
| 902 | ip6_neighbor_syslog (vm, LOG_ERR, |
| 903 | "malformed RA packet on %U from %U", |
| 904 | format_vnet_sw_if_index_name, |
| 905 | vnm, sw_if_index0, |
| 906 | format_ip6_address, |
| 907 | &ip0->src_address); |
| 908 | break; |
| 909 | } |
| 910 | |
| 911 | if (opt_len == 0) |
| 912 | { |
| 913 | ip6_neighbor_syslog (vm, LOG_ERR, |
| 914 | " zero length option in RA on %U from %U", |
| 915 | format_vnet_sw_if_index_name, |
| 916 | vnm, sw_if_index0, |
| 917 | format_ip6_address, |
| 918 | &ip0->src_address); |
| 919 | break; |
| 920 | } |
| 921 | else if (opt_len > options_len0) |
| 922 | { |
| 923 | ip6_neighbor_syslog (vm, LOG_ERR, |
| 924 | "option length in RA packet greater than total length on %U from %U", |
| 925 | format_vnet_sw_if_index_name, |
| 926 | vnm, sw_if_index0, |
| 927 | format_ip6_address, |
| 928 | &ip0->src_address); |
| 929 | break; |
| 930 | } |
| 931 | |
| 932 | options_len0 -= opt_len; |
| 933 | opt_hdr += opt_len; |
| 934 | |
| 935 | switch (option_type) |
| 936 | { |
| 937 | case ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address: |
| 938 | { |
| 939 | icmp6_neighbor_discovery_ethernet_link_layer_address_option_t |
| 940 | * h = |
| 941 | (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t |
| 942 | *) (o0); |
| 943 | |
| 944 | if (opt_len < sizeof (*h)) |
| 945 | break; |
| 946 | |
| 947 | memcpy (r.slla, h->ethernet_address, 6); |
| 948 | } |
| 949 | break; |
| 950 | |
| 951 | case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu: |
| 952 | { |
| 953 | icmp6_neighbor_discovery_mtu_option_t *h = |
| 954 | (icmp6_neighbor_discovery_mtu_option_t |
| 955 | *) (o0); |
| 956 | |
| 957 | if (opt_len < sizeof (*h)) |
| 958 | break; |
| 959 | |
| 960 | r.mtu = clib_net_to_host_u32 (h->mtu); |
| 961 | |
| 962 | if ((h->mtu && radv_info->adv_link_mtu) && |
| 963 | (h->mtu != |
| 964 | clib_host_to_net_u32 |
| 965 | (radv_info->adv_link_mtu))) |
| 966 | { |
| 967 | ip6_neighbor_syslog (vm, LOG_WARNING, |
| 968 | "our AdvLinkMTU on %U doesn't agree with %U", |
| 969 | format_vnet_sw_if_index_name, |
| 970 | vnm, sw_if_index0, |
| 971 | format_ip6_address, |
| 972 | &ip0->src_address); |
| 973 | } |
| 974 | } |
| 975 | break; |
| 976 | |
| 977 | case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information: |
| 978 | { |
| 979 | icmp6_neighbor_discovery_prefix_information_option_t |
| 980 | * h = |
| 981 | (icmp6_neighbor_discovery_prefix_information_option_t |
| 982 | *) (o0); |
| 983 | |
| 984 | /* validate advertised prefix options */ |
| 985 | ip6_radv_prefix_t *pr_info; |
| 986 | u32 preferred, valid; |
| 987 | |
| 988 | if (opt_len < sizeof (*h)) |
| 989 | break; |
| 990 | |
| 991 | vec_validate (r.prefixes, |
| 992 | vec_len (r.prefixes)); |
| 993 | ra_report_prefix_info_t *prefix = |
| 994 | vec_elt_at_index (r.prefixes, |
| 995 | vec_len (r.prefixes) - 1); |
| 996 | |
| 997 | preferred = |
| 998 | clib_net_to_host_u32 (h->preferred_time); |
| 999 | valid = clib_net_to_host_u32 (h->valid_time); |
| 1000 | |
| 1001 | prefix->preferred_time = preferred; |
| 1002 | prefix->valid_time = valid; |
| 1003 | prefix->flags = h->flags & 0xc0; |
| 1004 | prefix->prefix.fp_len = h->dst_address_length; |
| 1005 | prefix->prefix.fp_addr.ip6 = h->dst_address; |
| 1006 | prefix->prefix.fp_proto = FIB_PROTOCOL_IP6; |
| 1007 | |
| 1008 | /* look for matching prefix - if we our advertising it, it better be consistant */ |
| 1009 | /* *INDENT-OFF* */ |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame^] | 1010 | pool_foreach (pr_info, radv_info->adv_prefixes_pool) |
| 1011 | { |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1012 | |
| 1013 | ip6_address_t mask; |
| 1014 | ip6_address_mask_from_width(&mask, pr_info->prefix_len); |
| 1015 | |
| 1016 | if(pr_info->enabled && |
| 1017 | (pr_info->prefix_len == h->dst_address_length) && |
| 1018 | ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask)) |
| 1019 | { |
| 1020 | /* found it */ |
| 1021 | if(!pr_info->decrement_lifetime_flag && |
| 1022 | valid != pr_info->adv_valid_lifetime_in_secs) |
| 1023 | { |
| 1024 | ip6_neighbor_syslog(vm, LOG_WARNING, |
| 1025 | "our ADV validlifetime on %U for %U does not agree with %U", |
| 1026 | format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix, |
| 1027 | format_ip6_address, &h->dst_address); |
| 1028 | } |
| 1029 | if(!pr_info->decrement_lifetime_flag && |
| 1030 | preferred != pr_info->adv_pref_lifetime_in_secs) |
| 1031 | { |
| 1032 | ip6_neighbor_syslog(vm, LOG_WARNING, |
| 1033 | "our ADV preferredlifetime on %U for %U does not agree with %U", |
| 1034 | format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix, |
| 1035 | format_ip6_address, &h->dst_address); |
| 1036 | } |
| 1037 | } |
| 1038 | break; |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame^] | 1039 | } |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1040 | /* *INDENT-ON* */ |
| 1041 | break; |
| 1042 | } |
| 1043 | default: |
| 1044 | /* skip this one */ |
| 1045 | break; |
| 1046 | } |
| 1047 | } |
| 1048 | ip6_ra_publish (&r); |
| 1049 | } |
| 1050 | } |
| 1051 | } |
| 1052 | |
| 1053 | p0->error = error_node->errors[error0]; |
| 1054 | |
| 1055 | if (error0 != ICMP6_ERROR_NONE) |
| 1056 | vlib_error_count (vm, error_node->node_index, error0, 1); |
| 1057 | |
| 1058 | vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| 1059 | to_next, n_left_to_next, |
| 1060 | bi0, next0); |
| 1061 | } |
| 1062 | |
| 1063 | vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| 1064 | } |
| 1065 | |
| 1066 | /* Account for router advertisements received. */ |
| 1067 | vlib_error_count (vm, error_node->node_index, |
| 1068 | ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX, |
| 1069 | n_advertisements_rcvd); |
| 1070 | |
| 1071 | return frame->n_vectors; |
| 1072 | } |
| 1073 | |
| 1074 | /* *INDENT-OFF* */ |
| 1075 | VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) = |
| 1076 | { |
| 1077 | .function = icmp6_router_advertisement, |
| 1078 | .name = "icmp6-router-advertisement", |
| 1079 | |
| 1080 | .vector_size = sizeof (u32), |
| 1081 | |
| 1082 | .format_trace = format_icmp6_input_trace, |
| 1083 | |
| 1084 | .n_next_nodes = 1, |
| 1085 | .next_nodes = { |
| 1086 | [0] = "ip6-drop", |
| 1087 | }, |
| 1088 | }; |
| 1089 | /* *INDENT-ON* */ |
| 1090 | |
| 1091 | static inline f64 |
| 1092 | random_f64_from_to (f64 from, f64 to) |
| 1093 | { |
| 1094 | static u32 seed = 0; |
| 1095 | static u8 seed_set = 0; |
| 1096 | if (!seed_set) |
| 1097 | { |
| 1098 | seed = random_default_seed (); |
| 1099 | seed_set = 1; |
| 1100 | } |
| 1101 | return random_f64 (&seed) * (to - from) + from; |
| 1102 | } |
| 1103 | |
| 1104 | static inline u8 |
| 1105 | get_mac_address (u32 sw_if_index, u8 * address) |
| 1106 | { |
| 1107 | vnet_main_t *vnm = vnet_get_main (); |
| 1108 | vnet_hw_interface_t *hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index); |
| 1109 | if (!hw_if->hw_address) |
| 1110 | return 1; |
| 1111 | clib_memcpy (address, hw_if->hw_address, 6); |
| 1112 | return 0; |
| 1113 | } |
| 1114 | |
| 1115 | static inline vlib_buffer_t * |
| 1116 | create_buffer_for_rs (vlib_main_t * vm, ip6_ra_t * radv_info) |
| 1117 | { |
| 1118 | u32 bi0; |
| 1119 | vlib_buffer_t *p0; |
| 1120 | icmp6_router_solicitation_header_t *rh; |
| 1121 | u16 payload_length; |
| 1122 | int bogus_length; |
| 1123 | u32 sw_if_index; |
| 1124 | |
| 1125 | sw_if_index = radv_info->sw_if_index; |
| 1126 | |
| 1127 | if (vlib_buffer_alloc (vm, &bi0, 1) != 1) |
| 1128 | { |
| 1129 | clib_warning ("buffer allocation failure"); |
| 1130 | return 0; |
| 1131 | } |
| 1132 | |
| 1133 | p0 = vlib_get_buffer (vm, bi0); |
| 1134 | VLIB_BUFFER_TRACE_TRAJECTORY_INIT (p0); |
| 1135 | p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; |
| 1136 | |
| 1137 | vnet_buffer (p0)->sw_if_index[VLIB_RX] = sw_if_index; |
| 1138 | vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index; |
| 1139 | |
| 1140 | vnet_buffer (p0)->ip.adj_index[VLIB_TX] = |
| 1141 | ip6_link_get_mcast_adj (sw_if_index); |
| 1142 | |
| 1143 | rh = vlib_buffer_get_current (p0); |
| 1144 | p0->current_length = sizeof (*rh); |
| 1145 | |
| 1146 | rh->neighbor.icmp.type = ICMP6_router_solicitation; |
| 1147 | rh->neighbor.icmp.code = 0; |
| 1148 | rh->neighbor.icmp.checksum = 0; |
| 1149 | rh->neighbor.reserved_must_be_zero = 0; |
| 1150 | |
| 1151 | rh->link_layer_option.header.type = |
| 1152 | ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address; |
| 1153 | if (0 != get_mac_address (sw_if_index, |
| 1154 | rh->link_layer_option.ethernet_address)) |
| 1155 | { |
| 1156 | clib_warning ("interface with sw_if_index %u has no mac address", |
| 1157 | sw_if_index); |
| 1158 | vlib_buffer_free (vm, &bi0, 1); |
| 1159 | return 0; |
| 1160 | } |
| 1161 | rh->link_layer_option.header.n_data_u64s = 1; |
| 1162 | |
| 1163 | payload_length = sizeof (rh->neighbor) + sizeof (u64); |
| 1164 | |
| 1165 | rh->ip.ip_version_traffic_class_and_flow_label = |
| 1166 | clib_host_to_net_u32 (0x6 << 28); |
| 1167 | rh->ip.payload_length = clib_host_to_net_u16 (payload_length); |
| 1168 | rh->ip.protocol = IP_PROTOCOL_ICMP6; |
| 1169 | rh->ip.hop_limit = 255; |
| 1170 | ip6_address_copy (&rh->ip.src_address, |
| 1171 | ip6_get_link_local_address (radv_info->sw_if_index)); |
| 1172 | /* set address ff02::2 */ |
| 1173 | rh->ip.dst_address.as_u64[0] = clib_host_to_net_u64 (0xff02ULL << 48); |
| 1174 | rh->ip.dst_address.as_u64[1] = clib_host_to_net_u64 (2); |
| 1175 | |
| 1176 | rh->neighbor.icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0, |
| 1177 | &rh->ip, |
| 1178 | &bogus_length); |
| 1179 | |
| 1180 | return p0; |
| 1181 | } |
| 1182 | |
| 1183 | static inline void |
| 1184 | stop_sending_rs (vlib_main_t * vm, ip6_ra_t * ra) |
| 1185 | { |
| 1186 | u32 bi0; |
| 1187 | |
| 1188 | ra->keep_sending_rs = 0; |
| 1189 | if (ra->buffer) |
| 1190 | { |
| 1191 | bi0 = vlib_get_buffer_index (vm, ra->buffer); |
| 1192 | vlib_buffer_free (vm, &bi0, 1); |
| 1193 | ra->buffer = 0; |
| 1194 | } |
| 1195 | } |
| 1196 | |
| 1197 | static inline bool |
| 1198 | check_send_rs (vlib_main_t * vm, ip6_ra_t * radv_info, f64 current_time, |
| 1199 | f64 * due_time) |
| 1200 | { |
| 1201 | vlib_buffer_t *p0; |
| 1202 | vlib_frame_t *f; |
| 1203 | u32 *to_next; |
| 1204 | u32 next_index; |
| 1205 | vlib_buffer_t *c0; |
| 1206 | u32 ci0; |
| 1207 | |
| 1208 | icmp6_send_router_solicitation_params_t *params; |
| 1209 | |
| 1210 | if (!radv_info->keep_sending_rs) |
| 1211 | return false; |
| 1212 | |
| 1213 | params = &radv_info->params; |
| 1214 | |
| 1215 | if (radv_info->due_time > current_time) |
| 1216 | { |
| 1217 | *due_time = radv_info->due_time; |
| 1218 | return true; |
| 1219 | } |
| 1220 | |
| 1221 | p0 = radv_info->buffer; |
| 1222 | |
| 1223 | next_index = ip6_rewrite_mcast_node.index; |
| 1224 | |
| 1225 | c0 = vlib_buffer_copy (vm, p0); |
Dave Barach | 954c707 | 2020-04-08 08:14:57 -0400 | [diff] [blame] | 1226 | if (c0 == NULL) |
| 1227 | return radv_info->keep_sending_rs; |
| 1228 | |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1229 | ci0 = vlib_get_buffer_index (vm, c0); |
| 1230 | |
| 1231 | f = vlib_get_frame_to_node (vm, next_index); |
| 1232 | to_next = vlib_frame_vector_args (f); |
| 1233 | to_next[0] = ci0; |
| 1234 | f->n_vectors = 1; |
| 1235 | vlib_put_frame_to_node (vm, next_index, f); |
| 1236 | |
| 1237 | if (params->mrc != 0 && --radv_info->n_left == 0) |
| 1238 | stop_sending_rs (vm, radv_info); |
| 1239 | else |
| 1240 | { |
| 1241 | radv_info->sleep_interval = |
| 1242 | (2 + random_f64_from_to (-0.1, 0.1)) * radv_info->sleep_interval; |
| 1243 | if (radv_info->sleep_interval > params->mrt) |
| 1244 | radv_info->sleep_interval = |
| 1245 | (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt; |
| 1246 | |
| 1247 | radv_info->due_time = current_time + radv_info->sleep_interval; |
| 1248 | |
| 1249 | if (params->mrd != 0 |
| 1250 | && current_time > radv_info->start_time + params->mrd) |
| 1251 | stop_sending_rs (vm, radv_info); |
| 1252 | else |
| 1253 | *due_time = radv_info->due_time; |
| 1254 | } |
| 1255 | |
| 1256 | return radv_info->keep_sending_rs; |
| 1257 | } |
| 1258 | |
| 1259 | static uword |
| 1260 | send_rs_process (vlib_main_t * vm, vlib_node_runtime_t * rt, |
| 1261 | vlib_frame_t * f0) |
| 1262 | { |
| 1263 | uword *event_data = NULL; |
| 1264 | f64 sleep_time = 1e9; |
| 1265 | ip6_ra_t *radv_info; |
| 1266 | f64 current_time; |
| 1267 | f64 due_time; |
| 1268 | f64 dt = 0; |
| 1269 | |
| 1270 | while (true) |
| 1271 | { |
| 1272 | vlib_process_wait_for_event_or_clock (vm, sleep_time); |
| 1273 | vlib_process_get_events (vm, &event_data); |
| 1274 | vec_reset_length (event_data); |
| 1275 | |
| 1276 | current_time = vlib_time_now (vm); |
| 1277 | do |
| 1278 | { |
| 1279 | due_time = current_time + 1e9; |
| 1280 | /* *INDENT-OFF* */ |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame^] | 1281 | pool_foreach (radv_info, ip6_ra_pool) |
| 1282 | { |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1283 | if (check_send_rs (vm, radv_info, current_time, &dt) |
| 1284 | && (dt < due_time)) |
| 1285 | due_time = dt; |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame^] | 1286 | } |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1287 | /* *INDENT-ON* */ |
| 1288 | current_time = vlib_time_now (vm); |
| 1289 | } |
| 1290 | while (due_time < current_time); |
| 1291 | |
| 1292 | sleep_time = due_time - current_time; |
| 1293 | } |
| 1294 | |
| 1295 | return 0; |
| 1296 | } |
| 1297 | |
| 1298 | /* *INDENT-OFF* */ |
| 1299 | VLIB_REGISTER_NODE (ip6_rs_process_node) = { |
| 1300 | .function = send_rs_process, |
| 1301 | .type = VLIB_NODE_TYPE_PROCESS, |
| 1302 | .name = "ip6-rs-process", |
| 1303 | }; |
| 1304 | /* *INDENT-ON* */ |
| 1305 | |
| 1306 | void |
| 1307 | icmp6_send_router_solicitation (vlib_main_t * vm, u32 sw_if_index, u8 stop, |
| 1308 | const icmp6_send_router_solicitation_params_t |
| 1309 | * params) |
| 1310 | { |
| 1311 | ip6_ra_t *ra; |
| 1312 | |
| 1313 | ASSERT (~0 != sw_if_index); |
| 1314 | |
| 1315 | ra = ip6_ra_get_itf (sw_if_index); |
| 1316 | |
| 1317 | if (!ra) |
| 1318 | return; |
| 1319 | |
| 1320 | stop_sending_rs (vm, ra); |
| 1321 | |
| 1322 | if (!stop) |
| 1323 | { |
| 1324 | ra->keep_sending_rs = 1; |
| 1325 | ra->params = *params; |
| 1326 | ra->n_left = params->mrc; |
| 1327 | ra->start_time = vlib_time_now (vm); |
| 1328 | ra->sleep_interval = (1 + random_f64_from_to (-0.1, 0.1)) * params->irt; |
| 1329 | ra->due_time = 0; /* send first packet ASAP */ |
| 1330 | ra->buffer = create_buffer_for_rs (vm, ra); |
| 1331 | if (!ra->buffer) |
| 1332 | ra->keep_sending_rs = 0; |
| 1333 | else |
| 1334 | vlib_process_signal_event (vm, ip6_rs_process_node.index, 1, 0); |
| 1335 | } |
| 1336 | } |
| 1337 | |
| 1338 | static const ethernet_interface_t * |
| 1339 | ip6_ra_get_eth_itf (u32 sw_if_index) |
| 1340 | { |
| 1341 | const vnet_sw_interface_t *sw; |
| 1342 | |
| 1343 | /* lookup radv container - ethernet interfaces only */ |
| 1344 | sw = vnet_get_sup_sw_interface (vnet_get_main (), sw_if_index); |
| 1345 | if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE) |
| 1346 | return (ethernet_get_interface (ðernet_main, sw->hw_if_index)); |
| 1347 | |
| 1348 | return (NULL); |
| 1349 | } |
| 1350 | |
| 1351 | /** |
| 1352 | * @brief called when IP6 is enabled on an interface |
| 1353 | *create and initialize router advertisement parameters with default |
| 1354 | * values for this intfc |
| 1355 | */ |
| 1356 | static void |
| 1357 | ip6_ra_link_enable (u32 sw_if_index) |
| 1358 | { |
| 1359 | const ethernet_interface_t *eth; |
| 1360 | ip6_ra_t *radv_info; |
| 1361 | |
| 1362 | eth = ip6_ra_get_eth_itf (sw_if_index); |
| 1363 | |
| 1364 | if (NULL == eth) |
| 1365 | return; |
| 1366 | |
| 1367 | ASSERT (INDEX_INVALID == ip6_link_delegate_get (sw_if_index, |
| 1368 | ip6_ra_delegate_id)); |
| 1369 | |
| 1370 | pool_get_zero (ip6_ra_pool, radv_info); |
| 1371 | |
| 1372 | radv_info->seed = (u32) clib_cpu_time_now (); |
| 1373 | random_u32 (&radv_info->seed); |
| 1374 | |
| 1375 | radv_info->sw_if_index = sw_if_index; |
| 1376 | radv_info->max_radv_interval = DEF_MAX_RADV_INTERVAL; |
| 1377 | radv_info->min_radv_interval = DEF_MIN_RADV_INTERVAL; |
| 1378 | radv_info->curr_hop_limit = DEF_CURR_HOP_LIMIT; |
| 1379 | radv_info->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME; |
| 1380 | |
| 1381 | /* send ll address source address option */ |
| 1382 | radv_info->adv_link_layer_address = 1; |
| 1383 | |
| 1384 | radv_info->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS; |
| 1385 | radv_info->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS; |
| 1386 | radv_info->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME; |
| 1387 | |
| 1388 | radv_info->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS; |
| 1389 | radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1; |
| 1390 | radv_info->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL; |
| 1391 | |
| 1392 | /* deafult is to send */ |
| 1393 | radv_info->send_radv = 1; |
| 1394 | |
| 1395 | /* fill in delegate for this interface that will be needed later */ |
| 1396 | radv_info->adv_link_mtu = |
| 1397 | vnet_sw_interface_get_mtu (vnet_get_main (), sw_if_index, VNET_MTU_IP6); |
| 1398 | |
| 1399 | mhash_init (&radv_info->address_to_prefix_index, sizeof (uword), |
| 1400 | sizeof (ip6_address_t)); |
| 1401 | |
| 1402 | ip6_link_delegate_update (sw_if_index, ip6_ra_delegate_id, |
| 1403 | radv_info - ip6_ra_pool); |
| 1404 | } |
| 1405 | |
| 1406 | static void |
| 1407 | ip6_ra_delegate_disable (index_t rai) |
| 1408 | { |
| 1409 | ip6_radv_prefix_t *p; |
| 1410 | ip6_ra_t *radv_info; |
| 1411 | |
| 1412 | radv_info = pool_elt_at_index (ip6_ra_pool, rai); |
| 1413 | |
| 1414 | /* clean up prefix and MDP pools */ |
| 1415 | /* *INDENT-OFF* */ |
| 1416 | pool_flush(p, radv_info->adv_prefixes_pool, |
| 1417 | ({ |
| 1418 | mhash_unset (&radv_info->address_to_prefix_index, &p->prefix, 0); |
| 1419 | })); |
| 1420 | /* *INDENT-ON* */ |
| 1421 | |
| 1422 | pool_free (radv_info->adv_prefixes_pool); |
| 1423 | |
| 1424 | mhash_free (&radv_info->address_to_prefix_index); |
| 1425 | |
| 1426 | pool_put (ip6_ra_pool, radv_info); |
| 1427 | } |
| 1428 | |
Dave Barach | d158696 | 2020-02-20 16:17:58 -0500 | [diff] [blame] | 1429 | void |
| 1430 | ip6_ra_update_secondary_radv_info (ip6_address_t * address, u8 prefix_len, |
| 1431 | u32 primary_sw_if_index, |
| 1432 | u32 valid_time, u32 preferred_time) |
| 1433 | { |
| 1434 | vlib_main_t *vm = vlib_get_main (); |
| 1435 | static u32 *radv_indices; |
| 1436 | ip6_ra_t *radv_info; |
| 1437 | int i; |
| 1438 | ip6_address_t mask; |
| 1439 | ip6_address_mask_from_width (&mask, prefix_len); |
| 1440 | |
| 1441 | vec_reset_length (radv_indices); |
| 1442 | /* *INDENT-OFF* */ |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame^] | 1443 | pool_foreach (radv_info, ip6_ra_pool) |
| 1444 | { |
Dave Barach | d158696 | 2020-02-20 16:17:58 -0500 | [diff] [blame] | 1445 | vec_add1 (radv_indices, radv_info - ip6_ra_pool); |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame^] | 1446 | } |
Dave Barach | d158696 | 2020-02-20 16:17:58 -0500 | [diff] [blame] | 1447 | /* *INDENT-ON* */ |
| 1448 | |
| 1449 | /* |
| 1450 | * If we have another customer for this prefix, |
| 1451 | * tell the RA code about it... |
| 1452 | */ |
| 1453 | for (i = 0; i < vec_len (radv_indices); i++) |
| 1454 | { |
| 1455 | ip6_radv_prefix_t *this_prefix; |
| 1456 | radv_info = pool_elt_at_index (ip6_ra_pool, radv_indices[i]); |
| 1457 | |
| 1458 | /* We already took care of these timers... */ |
| 1459 | if (radv_info->sw_if_index == primary_sw_if_index) |
| 1460 | continue; |
| 1461 | |
| 1462 | /* *INDENT-OFF* */ |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame^] | 1463 | pool_foreach (this_prefix, radv_info->adv_prefixes_pool) |
| 1464 | { |
Dave Barach | d158696 | 2020-02-20 16:17:58 -0500 | [diff] [blame] | 1465 | if (this_prefix->prefix_len == prefix_len |
| 1466 | && ip6_address_is_equal_masked (&this_prefix->prefix, address, |
| 1467 | &mask)) |
| 1468 | { |
| 1469 | int rv = ip6_ra_prefix (vm, |
| 1470 | radv_info->sw_if_index, |
| 1471 | address, |
| 1472 | prefix_len, |
| 1473 | 0 /* use_default */, |
| 1474 | valid_time, |
| 1475 | preferred_time, |
| 1476 | 0 /* no_advertise */, |
| 1477 | 0 /* off_link */, |
| 1478 | 0 /* no_autoconfig */, |
| 1479 | 0 /* no_onlink */, |
| 1480 | 0 /* is_no */); |
| 1481 | if (rv != 0) |
| 1482 | clib_warning ("ip6_neighbor_ra_prefix returned %d", rv); |
| 1483 | } |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame^] | 1484 | } |
Dave Barach | d158696 | 2020-02-20 16:17:58 -0500 | [diff] [blame] | 1485 | /* *INDENT-ON*/ |
| 1486 | } |
| 1487 | } |
| 1488 | |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1489 | /* send a RA or update the timer info etc.. */ |
| 1490 | static uword |
| 1491 | ip6_ra_process_timer_event (vlib_main_t * vm, |
| 1492 | vlib_node_runtime_t * node, vlib_frame_t * frame) |
| 1493 | { |
| 1494 | vnet_main_t *vnm = vnet_get_main (); |
| 1495 | ip6_ra_t *radv_info; |
| 1496 | vlib_frame_t *f = 0; |
| 1497 | u32 n_this_frame = 0; |
| 1498 | u32 n_left_to_next = 0; |
| 1499 | u32 *to_next = 0; |
| 1500 | u32 bo0; |
| 1501 | icmp6_router_solicitation_header_t *h0; |
| 1502 | vlib_buffer_t *b0; |
| 1503 | f64 now = vlib_time_now (vm); |
| 1504 | |
| 1505 | /* Interface ip6 radv info list */ |
| 1506 | /* *INDENT-OFF* */ |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame^] | 1507 | pool_foreach (radv_info, ip6_ra_pool) |
| 1508 | { |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1509 | if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index)) |
| 1510 | { |
| 1511 | radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1; |
| 1512 | radv_info->next_multicast_time = now; |
| 1513 | radv_info->last_multicast_time = now; |
| 1514 | radv_info->last_radv_time = 0; |
| 1515 | continue; |
| 1516 | } |
| 1517 | |
| 1518 | /* is it time to send a multicast RA on this interface? */ |
| 1519 | if(radv_info->send_radv && (now >= radv_info->next_multicast_time)) |
| 1520 | { |
| 1521 | u32 n_to_alloc = 1; |
| 1522 | u32 n_allocated; |
| 1523 | |
| 1524 | f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) * |
| 1525 | random_f64 (&radv_info->seed) + radv_info->min_radv_interval; |
| 1526 | |
| 1527 | /* multicast send - compute next multicast send time */ |
| 1528 | if( radv_info->initial_adverts_sent > 0) |
| 1529 | { |
| 1530 | radv_info->initial_adverts_sent--; |
| 1531 | if(rfn > radv_info->initial_adverts_interval) |
| 1532 | rfn = radv_info->initial_adverts_interval; |
| 1533 | |
| 1534 | /* check to see if we are ceasing to send */ |
| 1535 | if( radv_info->initial_adverts_sent == 0) |
| 1536 | if(radv_info->cease_radv) |
| 1537 | radv_info->send_radv = 0; |
| 1538 | } |
| 1539 | |
| 1540 | radv_info->next_multicast_time = rfn + now; |
| 1541 | radv_info->last_multicast_time = now; |
| 1542 | |
| 1543 | /* send advert now - build a "solicted" router advert with unspecified source address */ |
| 1544 | n_allocated = vlib_buffer_alloc (vm, &bo0, n_to_alloc); |
| 1545 | |
| 1546 | if (PREDICT_FALSE(n_allocated == 0)) |
| 1547 | { |
| 1548 | clib_warning ("buffer allocation failure"); |
| 1549 | continue; |
| 1550 | } |
| 1551 | b0 = vlib_get_buffer (vm, bo0); |
| 1552 | b0->current_length = sizeof( icmp6_router_solicitation_header_t); |
| 1553 | b0->error = ICMP6_ERROR_NONE; |
| 1554 | vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index; |
| 1555 | |
| 1556 | h0 = vlib_buffer_get_current (b0); |
| 1557 | |
| 1558 | clib_memset (h0, 0, sizeof (icmp6_router_solicitation_header_t)); |
| 1559 | |
| 1560 | h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28); |
| 1561 | h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t) |
| 1562 | - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor)); |
| 1563 | h0->ip.protocol = IP_PROTOCOL_ICMP6; |
| 1564 | h0->ip.hop_limit = 255; |
| 1565 | |
| 1566 | /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */ |
| 1567 | h0->ip.src_address.as_u64[0] = 0; |
| 1568 | h0->ip.src_address.as_u64[1] = 0; |
| 1569 | |
| 1570 | h0->ip.dst_address.as_u64[0] = 0; |
| 1571 | h0->ip.dst_address.as_u64[1] = 0; |
| 1572 | |
| 1573 | h0->neighbor.icmp.type = ICMP6_router_solicitation; |
| 1574 | |
| 1575 | if (PREDICT_FALSE(f == 0)) |
| 1576 | { |
| 1577 | f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index); |
| 1578 | to_next = vlib_frame_vector_args (f); |
| 1579 | n_left_to_next = VLIB_FRAME_SIZE; |
| 1580 | n_this_frame = 0; |
| 1581 | } |
| 1582 | |
| 1583 | n_this_frame++; |
| 1584 | n_left_to_next--; |
| 1585 | to_next[0] = bo0; |
| 1586 | to_next += 1; |
| 1587 | |
| 1588 | if (PREDICT_FALSE(n_left_to_next == 0)) |
| 1589 | { |
| 1590 | f->n_vectors = n_this_frame; |
| 1591 | vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f); |
| 1592 | f = 0; |
| 1593 | } |
| 1594 | } |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame^] | 1595 | } |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1596 | /* *INDENT-ON* */ |
| 1597 | |
| 1598 | if (f) |
| 1599 | { |
| 1600 | ASSERT (n_this_frame); |
| 1601 | f->n_vectors = n_this_frame; |
| 1602 | vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f); |
| 1603 | } |
| 1604 | return 0; |
| 1605 | } |
| 1606 | |
| 1607 | static void |
Dave Barach | 5f09efe | 2020-11-09 17:11:57 -0500 | [diff] [blame] | 1608 | ip6_ra_handle_report (ip6_ra_report_t * rap) |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1609 | { |
| 1610 | u32 ii; |
| 1611 | |
| 1612 | vec_foreach_index (ii, ip6_ra_listeners) ip6_ra_listeners[ii] (rap); |
Dave Barach | 5f09efe | 2020-11-09 17:11:57 -0500 | [diff] [blame] | 1613 | vec_free (rap->prefixes); |
| 1614 | clib_mem_free (rap); |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1615 | } |
| 1616 | |
| 1617 | static uword |
| 1618 | ip6_ra_event_process (vlib_main_t * vm, |
| 1619 | vlib_node_runtime_t * node, vlib_frame_t * frame) |
| 1620 | { |
Dave Barach | 5f09efe | 2020-11-09 17:11:57 -0500 | [diff] [blame] | 1621 | ip6_ra_report_t *r; |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1622 | uword event_type; |
Dave Barach | 5f09efe | 2020-11-09 17:11:57 -0500 | [diff] [blame] | 1623 | uword *event_data = 0; |
| 1624 | int i; |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1625 | |
| 1626 | /* init code here */ |
| 1627 | |
| 1628 | while (1) |
| 1629 | { |
| 1630 | vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ ); |
| 1631 | |
Dave Barach | 5f09efe | 2020-11-09 17:11:57 -0500 | [diff] [blame] | 1632 | event_type = vlib_process_get_events (vm, &event_data); |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1633 | |
Dave Barach | 5f09efe | 2020-11-09 17:11:57 -0500 | [diff] [blame] | 1634 | if (event_type == ~0) |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1635 | { |
| 1636 | /* No events found: timer expired. */ |
| 1637 | /* process interface list and send RAs as appropriate, update timer info */ |
| 1638 | ip6_ra_process_timer_event (vm, node, frame); |
| 1639 | } |
| 1640 | else |
| 1641 | { |
Dave Barach | 5f09efe | 2020-11-09 17:11:57 -0500 | [diff] [blame] | 1642 | for (i = 0; i < vec_len (event_data); i++) |
| 1643 | { |
| 1644 | r = (void *) (event_data[i]); |
| 1645 | ip6_ra_handle_report (r); |
| 1646 | } |
| 1647 | vec_reset_length (event_data); |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1648 | } |
| 1649 | } |
| 1650 | return frame->n_vectors; |
| 1651 | } |
| 1652 | |
Dave Barach | 5f09efe | 2020-11-09 17:11:57 -0500 | [diff] [blame] | 1653 | /* *INDENT-OFF* */ |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1654 | VLIB_REGISTER_NODE (ip6_ra_process_node) = |
| 1655 | { |
Dave Barach | 5f09efe | 2020-11-09 17:11:57 -0500 | [diff] [blame] | 1656 | .function = ip6_ra_event_process, |
| 1657 | .name = "ip6-ra-process", |
| 1658 | .type = VLIB_NODE_TYPE_PROCESS, |
| 1659 | }; |
| 1660 | /* *INDENT-ON* */ |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1661 | |
| 1662 | static void |
| 1663 | ip6_ra_signal_report (ip6_ra_report_t * r) |
| 1664 | { |
| 1665 | vlib_main_t *vm = vlib_get_main (); |
| 1666 | ip6_ra_report_t *q; |
| 1667 | |
| 1668 | if (!vec_len (ip6_ra_listeners)) |
| 1669 | return; |
| 1670 | |
Dave Barach | 5f09efe | 2020-11-09 17:11:57 -0500 | [diff] [blame] | 1671 | q = clib_mem_alloc (sizeof (*q)); |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1672 | *q = *r; |
Dave Barach | 5f09efe | 2020-11-09 17:11:57 -0500 | [diff] [blame] | 1673 | |
| 1674 | vlib_process_signal_event (vm, ip6_ra_process_node.index, 0, (uword) q); |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1675 | } |
| 1676 | |
| 1677 | static int |
| 1678 | ip6_ra_publish (ip6_ra_report_t * r) |
| 1679 | { |
| 1680 | void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length); |
| 1681 | vl_api_rpc_call_main_thread (ip6_ra_signal_report, (u8 *) r, sizeof *r); |
| 1682 | return 0; |
| 1683 | } |
| 1684 | |
| 1685 | /* API support functions */ |
| 1686 | int |
| 1687 | ip6_ra_config (vlib_main_t * vm, u32 sw_if_index, |
| 1688 | u8 suppress, u8 managed, u8 other, |
| 1689 | u8 ll_option, u8 send_unicast, u8 cease, |
| 1690 | u8 use_lifetime, u32 lifetime, |
| 1691 | u32 initial_count, u32 initial_interval, |
| 1692 | u32 max_interval, u32 min_interval, u8 is_no) |
| 1693 | { |
| 1694 | ip6_ra_t *radv_info; |
| 1695 | |
| 1696 | /* look up the radv_t information for this interface */ |
| 1697 | radv_info = ip6_ra_get_itf (sw_if_index); |
| 1698 | |
| 1699 | if (!radv_info) |
| 1700 | return (VNET_API_ERROR_IP6_NOT_ENABLED); |
| 1701 | |
| 1702 | if ((max_interval != 0) && (min_interval == 0)) |
| 1703 | min_interval = .75 * max_interval; |
| 1704 | |
| 1705 | max_interval = |
| 1706 | (max_interval != |
| 1707 | 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) : |
| 1708 | radv_info->max_radv_interval; |
| 1709 | min_interval = |
| 1710 | (min_interval != |
| 1711 | 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) : |
| 1712 | radv_info->min_radv_interval; |
| 1713 | lifetime = |
| 1714 | (use_lifetime != |
| 1715 | 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) : |
| 1716 | radv_info->adv_router_lifetime_in_sec; |
| 1717 | |
| 1718 | if (lifetime) |
| 1719 | { |
| 1720 | if (lifetime > MAX_DEF_RTR_LIFETIME) |
| 1721 | lifetime = MAX_DEF_RTR_LIFETIME; |
| 1722 | |
| 1723 | if (lifetime <= max_interval) |
| 1724 | return VNET_API_ERROR_INVALID_VALUE; |
| 1725 | } |
| 1726 | |
| 1727 | if (min_interval != 0) |
| 1728 | { |
| 1729 | if ((min_interval > .75 * max_interval) || (min_interval < 3)) |
| 1730 | return VNET_API_ERROR_INVALID_VALUE; |
| 1731 | } |
| 1732 | |
| 1733 | if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) || |
| 1734 | (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL)) |
| 1735 | return VNET_API_ERROR_INVALID_VALUE; |
| 1736 | |
| 1737 | /* |
| 1738 | if "flag" is set and is_no is true then restore default value else set value corresponding to "flag" |
| 1739 | if "flag" is clear don't change corresponding value |
| 1740 | */ |
| 1741 | radv_info->send_radv = |
| 1742 | (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv; |
| 1743 | radv_info->adv_managed_flag = |
| 1744 | (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag; |
| 1745 | radv_info->adv_other_flag = |
| 1746 | (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag; |
| 1747 | radv_info->adv_link_layer_address = |
| 1748 | (ll_option != 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address; |
| 1749 | radv_info->send_unicast = |
| 1750 | (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast; |
| 1751 | radv_info->cease_radv = |
| 1752 | (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv; |
| 1753 | |
| 1754 | radv_info->min_radv_interval = min_interval; |
| 1755 | radv_info->max_radv_interval = max_interval; |
| 1756 | radv_info->adv_router_lifetime_in_sec = lifetime; |
| 1757 | |
| 1758 | radv_info->initial_adverts_count = |
| 1759 | (initial_count != |
| 1760 | 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) : |
| 1761 | radv_info->initial_adverts_count; |
| 1762 | radv_info->initial_adverts_interval = |
| 1763 | (initial_interval != |
| 1764 | 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) : |
| 1765 | radv_info->initial_adverts_interval; |
| 1766 | |
| 1767 | /* restart */ |
| 1768 | if ((cease != 0) && (is_no)) |
| 1769 | radv_info->send_radv = 1; |
| 1770 | |
| 1771 | radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1; |
| 1772 | radv_info->next_multicast_time = vlib_time_now (vm); |
| 1773 | radv_info->last_multicast_time = vlib_time_now (vm); |
| 1774 | radv_info->last_radv_time = 0; |
| 1775 | |
| 1776 | return (0); |
| 1777 | } |
| 1778 | |
| 1779 | |
| 1780 | int |
| 1781 | ip6_ra_prefix (vlib_main_t * vm, u32 sw_if_index, |
| 1782 | ip6_address_t * prefix_addr, u8 prefix_len, |
| 1783 | u8 use_default, u32 val_lifetime, u32 pref_lifetime, |
| 1784 | u8 no_advertise, u8 off_link, u8 no_autoconfig, |
| 1785 | u8 no_onlink, u8 is_no) |
| 1786 | { |
| 1787 | ip6_ra_t *radv_info; |
| 1788 | |
| 1789 | /* look up the radv_t information for this interface */ |
| 1790 | radv_info = ip6_ra_get_itf (sw_if_index); |
| 1791 | |
| 1792 | if (!radv_info) |
| 1793 | return (VNET_API_ERROR_IP6_NOT_ENABLED); |
| 1794 | |
| 1795 | f64 now = vlib_time_now (vm); |
| 1796 | |
| 1797 | /* prefix info add, delete or update */ |
| 1798 | ip6_radv_prefix_t *prefix; |
| 1799 | |
| 1800 | /* lookup prefix info for this address on this interface */ |
| 1801 | uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr); |
| 1802 | |
| 1803 | prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0; |
| 1804 | |
| 1805 | if (is_no) |
| 1806 | { |
| 1807 | /* delete */ |
| 1808 | if (!prefix) |
| 1809 | return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */ |
| 1810 | |
| 1811 | if (prefix->prefix_len != prefix_len) |
| 1812 | return VNET_API_ERROR_INVALID_VALUE_2; |
| 1813 | |
| 1814 | /* FIXME - Should the DP do this or the CP ? */ |
| 1815 | /* do specific delete processing here before returning */ |
| 1816 | /* try to remove from routing table */ |
| 1817 | |
| 1818 | mhash_unset (&radv_info->address_to_prefix_index, prefix_addr, |
| 1819 | /* old_value */ 0); |
| 1820 | pool_put (radv_info->adv_prefixes_pool, prefix); |
| 1821 | |
| 1822 | radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1; |
| 1823 | radv_info->next_multicast_time = vlib_time_now (vm); |
| 1824 | radv_info->last_multicast_time = vlib_time_now (vm); |
| 1825 | radv_info->last_radv_time = 0; |
| 1826 | return (0); |
| 1827 | } |
| 1828 | |
| 1829 | /* adding or changing */ |
| 1830 | if (!prefix) |
| 1831 | { |
| 1832 | /* add */ |
| 1833 | u32 pi; |
| 1834 | pool_get_zero (radv_info->adv_prefixes_pool, prefix); |
| 1835 | pi = prefix - radv_info->adv_prefixes_pool; |
| 1836 | mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi, |
| 1837 | /* old_value */ 0); |
| 1838 | |
| 1839 | clib_memset (prefix, 0x0, sizeof (ip6_radv_prefix_t)); |
| 1840 | |
| 1841 | prefix->prefix_len = prefix_len; |
| 1842 | clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t)); |
| 1843 | |
| 1844 | /* initialize default values */ |
| 1845 | prefix->adv_on_link_flag = 1; /* L bit set */ |
| 1846 | prefix->adv_autonomous_flag = 1; /* A bit set */ |
| 1847 | prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME; |
| 1848 | prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME; |
| 1849 | prefix->enabled = 1; |
| 1850 | prefix->decrement_lifetime_flag = 1; |
| 1851 | prefix->deprecated_prefix_flag = 1; |
| 1852 | |
| 1853 | if (off_link == 0) |
| 1854 | { |
| 1855 | /* FIXME - Should the DP do this or the CP ? */ |
| 1856 | /* insert prefix into routing table as a connected prefix */ |
| 1857 | } |
| 1858 | |
| 1859 | if (use_default) |
| 1860 | goto restart; |
| 1861 | } |
| 1862 | else |
| 1863 | { |
| 1864 | |
| 1865 | if (prefix->prefix_len != prefix_len) |
| 1866 | return VNET_API_ERROR_INVALID_VALUE_2; |
| 1867 | |
| 1868 | if (off_link != 0) |
| 1869 | { |
| 1870 | /* FIXME - Should the DP do this or the CP ? */ |
| 1871 | /* remove from routing table if already there */ |
| 1872 | } |
| 1873 | } |
| 1874 | |
| 1875 | if ((val_lifetime == ~0) || (pref_lifetime == ~0)) |
| 1876 | { |
| 1877 | prefix->adv_valid_lifetime_in_secs = ~0; |
| 1878 | prefix->adv_pref_lifetime_in_secs = ~0; |
| 1879 | prefix->decrement_lifetime_flag = 0; |
| 1880 | } |
| 1881 | else |
| 1882 | { |
| 1883 | prefix->adv_valid_lifetime_in_secs = val_lifetime;; |
| 1884 | prefix->adv_pref_lifetime_in_secs = pref_lifetime; |
| 1885 | } |
| 1886 | |
| 1887 | /* copy remaining */ |
| 1888 | prefix->enabled = !(no_advertise != 0); |
| 1889 | prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0)); |
| 1890 | prefix->adv_autonomous_flag = !(no_autoconfig != 0); |
| 1891 | |
| 1892 | restart: |
| 1893 | /* restart */ |
| 1894 | /* fill in the expiration times */ |
| 1895 | prefix->valid_lifetime_expires = now + prefix->adv_valid_lifetime_in_secs; |
| 1896 | prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs; |
| 1897 | |
| 1898 | radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1; |
| 1899 | radv_info->next_multicast_time = vlib_time_now (vm); |
| 1900 | radv_info->last_multicast_time = vlib_time_now (vm); |
| 1901 | radv_info->last_radv_time = 0; |
| 1902 | |
| 1903 | return (0); |
| 1904 | } |
| 1905 | |
| 1906 | clib_error_t * |
| 1907 | ip6_ra_cmd (vlib_main_t * vm, |
| 1908 | unformat_input_t * main_input, vlib_cli_command_t * cmd) |
| 1909 | { |
| 1910 | vnet_main_t *vnm = vnet_get_main (); |
| 1911 | clib_error_t *error = 0; |
| 1912 | u8 is_no = 0; |
| 1913 | u8 suppress = 0, managed = 0, other = 0; |
| 1914 | u8 suppress_ll_option = 0, send_unicast = 0, cease = 0; |
| 1915 | u8 use_lifetime = 0; |
| 1916 | u32 sw_if_index, ra_lifetime = 0, ra_initial_count = |
| 1917 | 0, ra_initial_interval = 0; |
| 1918 | u32 ra_max_interval = 0, ra_min_interval = 0; |
| 1919 | |
| 1920 | unformat_input_t _line_input, *line_input = &_line_input; |
| 1921 | |
| 1922 | int add_radv_info = 1; |
| 1923 | ip6_address_t ip6_addr; |
| 1924 | u32 addr_len; |
| 1925 | |
| 1926 | |
| 1927 | /* Get a line of input. */ |
| 1928 | if (!unformat_user (main_input, unformat_line_input, line_input)) |
| 1929 | return 0; |
| 1930 | |
| 1931 | /* get basic radv info for this interface */ |
| 1932 | if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) |
| 1933 | { |
| 1934 | |
| 1935 | if (unformat_user (line_input, |
| 1936 | unformat_vnet_sw_interface, vnm, &sw_if_index)) |
| 1937 | { |
| 1938 | if (!ip6_ra_get_eth_itf (sw_if_index)) |
| 1939 | { |
| 1940 | error = |
| 1941 | clib_error_return (0, "Interface must be of ethernet type"); |
| 1942 | goto done; |
| 1943 | } |
| 1944 | |
| 1945 | if (!ip6_link_is_enabled (sw_if_index)) |
| 1946 | { |
| 1947 | error = clib_error_return (0, "IP6 nt enabler interface %U'", |
| 1948 | format_unformat_error, line_input); |
| 1949 | goto done; |
| 1950 | } |
| 1951 | } |
| 1952 | else |
| 1953 | { |
| 1954 | error = clib_error_return (0, "invalid interface name %U'", |
| 1955 | format_unformat_error, line_input); |
| 1956 | goto done; |
| 1957 | } |
| 1958 | } |
| 1959 | |
| 1960 | /* get the rest of the command */ |
| 1961 | while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) |
| 1962 | { |
| 1963 | if (unformat (line_input, "no")) |
| 1964 | is_no = 1; |
| 1965 | else if (unformat (line_input, "prefix %U/%d", |
| 1966 | unformat_ip6_address, &ip6_addr, &addr_len)) |
| 1967 | { |
| 1968 | add_radv_info = 0; |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1969 | } |
| 1970 | else if (unformat (line_input, "ra-managed-config-flag")) |
| 1971 | { |
| 1972 | managed = 1; |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1973 | } |
| 1974 | else if (unformat (line_input, "ra-other-config-flag")) |
| 1975 | { |
| 1976 | other = 1; |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1977 | } |
| 1978 | else if (unformat (line_input, "ra-suppress") || |
| 1979 | unformat (line_input, "ra-surpress")) |
| 1980 | { |
| 1981 | suppress = 1; |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1982 | } |
| 1983 | else if (unformat (line_input, "ra-suppress-link-layer") || |
| 1984 | unformat (line_input, "ra-surpress-link-layer")) |
| 1985 | { |
| 1986 | suppress_ll_option = 1; |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1987 | } |
| 1988 | else if (unformat (line_input, "ra-send-unicast")) |
| 1989 | { |
| 1990 | send_unicast = 1; |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 1991 | } |
| 1992 | else if (unformat (line_input, "ra-lifetime")) |
| 1993 | { |
| 1994 | if (!unformat (line_input, "%d", &ra_lifetime)) |
| 1995 | { |
| 1996 | error = unformat_parse_error (line_input); |
| 1997 | goto done; |
| 1998 | } |
| 1999 | use_lifetime = 1; |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 2000 | } |
| 2001 | else if (unformat (line_input, "ra-initial")) |
| 2002 | { |
| 2003 | if (!unformat |
| 2004 | (line_input, "%d %d", &ra_initial_count, &ra_initial_interval)) |
| 2005 | { |
| 2006 | error = unformat_parse_error (line_input); |
| 2007 | goto done; |
| 2008 | } |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 2009 | } |
| 2010 | else if (unformat (line_input, "ra-interval")) |
| 2011 | { |
| 2012 | if (!unformat (line_input, "%d", &ra_max_interval)) |
| 2013 | { |
| 2014 | error = unformat_parse_error (line_input); |
| 2015 | goto done; |
| 2016 | } |
| 2017 | |
| 2018 | if (!unformat (line_input, "%d", &ra_min_interval)) |
| 2019 | ra_min_interval = 0; |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 2020 | } |
| 2021 | else if (unformat (line_input, "ra-cease")) |
| 2022 | { |
| 2023 | cease = 1; |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 2024 | } |
| 2025 | else |
| 2026 | { |
| 2027 | error = unformat_parse_error (line_input); |
| 2028 | goto done; |
| 2029 | } |
| 2030 | } |
| 2031 | |
| 2032 | if (add_radv_info) |
| 2033 | { |
| 2034 | ip6_ra_config (vm, sw_if_index, |
| 2035 | suppress, managed, other, |
| 2036 | suppress_ll_option, send_unicast, cease, |
| 2037 | use_lifetime, ra_lifetime, |
| 2038 | ra_initial_count, ra_initial_interval, |
| 2039 | ra_max_interval, ra_min_interval, is_no); |
| 2040 | } |
| 2041 | else |
| 2042 | { |
| 2043 | u32 valid_lifetime_in_secs = 0; |
| 2044 | u32 pref_lifetime_in_secs = 0; |
| 2045 | u8 use_prefix_default_values = 0; |
| 2046 | u8 no_advertise = 0; |
| 2047 | u8 off_link = 0; |
| 2048 | u8 no_autoconfig = 0; |
| 2049 | u8 no_onlink = 0; |
| 2050 | |
| 2051 | /* get the rest of the command */ |
| 2052 | while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) |
| 2053 | { |
| 2054 | if (unformat (line_input, "default")) |
| 2055 | { |
| 2056 | use_prefix_default_values = 1; |
| 2057 | break; |
| 2058 | } |
| 2059 | else if (unformat (line_input, "infinite")) |
| 2060 | { |
| 2061 | valid_lifetime_in_secs = ~0; |
| 2062 | pref_lifetime_in_secs = ~0; |
| 2063 | break; |
| 2064 | } |
| 2065 | else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs, |
| 2066 | &pref_lifetime_in_secs)) |
| 2067 | break; |
| 2068 | else |
| 2069 | break; |
| 2070 | } |
| 2071 | |
| 2072 | |
| 2073 | /* get the rest of the command */ |
| 2074 | while (!use_prefix_default_values && |
| 2075 | unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) |
| 2076 | { |
| 2077 | if (unformat (line_input, "no-advertise")) |
| 2078 | no_advertise = 1; |
| 2079 | else if (unformat (line_input, "off-link")) |
| 2080 | off_link = 1; |
| 2081 | else if (unformat (line_input, "no-autoconfig")) |
| 2082 | no_autoconfig = 1; |
| 2083 | else if (unformat (line_input, "no-onlink")) |
| 2084 | no_onlink = 1; |
| 2085 | else |
| 2086 | { |
| 2087 | error = unformat_parse_error (line_input); |
| 2088 | goto done; |
| 2089 | } |
| 2090 | } |
| 2091 | |
| 2092 | ip6_ra_prefix (vm, sw_if_index, |
| 2093 | &ip6_addr, addr_len, |
| 2094 | use_prefix_default_values, |
| 2095 | valid_lifetime_in_secs, |
| 2096 | pref_lifetime_in_secs, |
| 2097 | no_advertise, off_link, no_autoconfig, no_onlink, is_no); |
| 2098 | } |
| 2099 | |
| 2100 | done: |
| 2101 | unformat_free (line_input); |
| 2102 | |
| 2103 | return error; |
| 2104 | } |
| 2105 | |
| 2106 | static u8 * |
| 2107 | format_ip6_ra (u8 * s, va_list * args) |
| 2108 | { |
| 2109 | index_t rai = va_arg (*args, index_t); |
| 2110 | u32 indent = va_arg (*args, u32); |
| 2111 | ip6_radv_prefix_t *p; |
| 2112 | ip6_ra_t *radv_info; |
| 2113 | |
| 2114 | radv_info = pool_elt_at_index (ip6_ra_pool, rai); |
| 2115 | |
| 2116 | s = format (s, "%UAdvertised Prefixes:\n", format_white_space, indent); |
| 2117 | |
| 2118 | indent += 2; |
| 2119 | |
| 2120 | /* *INDENT-OFF* */ |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame^] | 2121 | pool_foreach (p, radv_info->adv_prefixes_pool) |
| 2122 | { |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 2123 | s = format (s, "%Uprefix %U, length %d\n", |
| 2124 | format_white_space, indent+2, |
| 2125 | format_ip6_address, &p->prefix, p->prefix_len); |
Damjan Marion | b2c31b6 | 2020-12-13 21:47:40 +0100 | [diff] [blame^] | 2126 | } |
Neale Ranns | cbe25aa | 2019-09-30 10:53:31 +0000 | [diff] [blame] | 2127 | /* *INDENT-ON* */ |
| 2128 | |
| 2129 | s = format (s, "%UMTU is %d\n", |
| 2130 | format_white_space, indent, radv_info->adv_link_mtu); |
| 2131 | s = format (s, "%UICMP error messages are unlimited\n", |
| 2132 | format_white_space, indent); |
| 2133 | s = format (s, "%UICMP redirects are disabled\n", |
| 2134 | format_white_space, indent); |
| 2135 | s = format (s, "%UICMP unreachables are not sent\n", |
| 2136 | format_white_space, indent); |
| 2137 | s = format (s, "%UND DAD is disabled\n", format_white_space, indent); |
| 2138 | //s = format (s, "%UND reachable time is %d milliseconds\n",); |
| 2139 | s = format (s, "%UND advertised reachable time is %d\n", |
| 2140 | format_white_space, indent, |
| 2141 | radv_info->adv_neighbor_reachable_time_in_msec); |
| 2142 | s = format (s, |
| 2143 | "%UND advertised retransmit interval is %d (msec)\n", |
| 2144 | format_white_space, indent, |
| 2145 | radv_info-> |
| 2146 | adv_time_in_msec_between_retransmitted_neighbor_solicitations); |
| 2147 | s = |
| 2148 | format (s, |
| 2149 | "%UND router advertisements are sent every %0.1f seconds (min interval is %0.1f)\n", |
| 2150 | format_white_space, indent, radv_info->max_radv_interval, |
| 2151 | radv_info->min_radv_interval); |
| 2152 | s = |
| 2153 | format (s, "%UND router advertisements live for %d seconds\n", |
| 2154 | format_white_space, indent, |
| 2155 | radv_info->adv_router_lifetime_in_sec); |
| 2156 | s = |
| 2157 | format (s, "%UHosts %s stateless autoconfig for addresses\n", |
| 2158 | format_white_space, indent, |
| 2159 | (radv_info->adv_managed_flag) ? "use" : " don't use"); |
| 2160 | s = |
| 2161 | format (s, "%UND router advertisements sent %d\n", format_white_space, |
| 2162 | indent, radv_info->n_advertisements_sent); |
| 2163 | s = |
| 2164 | format (s, "%UND router solicitations received %d\n", format_white_space, |
| 2165 | indent, radv_info->n_solicitations_rcvd); |
| 2166 | s = |
| 2167 | format (s, "%UND router solicitations dropped %d\n", format_white_space, |
| 2168 | indent, radv_info->n_solicitations_dropped); |
| 2169 | |
| 2170 | return (s); |
| 2171 | } |
| 2172 | |
| 2173 | |
| 2174 | /*? |
| 2175 | * This command is used to configure the neighbor discovery |
| 2176 | * parameters on a given interface. Use the '<em>show ip6 interface</em>' |
| 2177 | * command to display some of the current neighbor discovery parameters |
| 2178 | * on a given interface. This command has three formats: |
| 2179 | * |
| 2180 | * |
| 2181 | * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command) |
| 2182 | * |
| 2183 | * '<em><b>ip6 nd <interface> [no] [ra-managed-config-flag] | [ra-other-config-flag] | [ra-suppress] | [ra-suppress-link-layer] | [ra-send-unicast] | [ra-lifetime <lifetime>] | [ra-initial <cnt> <interval>] | [ra-interval <max-interval> [<min-interval>]] | [ra-cease]</b></em>' |
| 2184 | * |
| 2185 | * Where: |
| 2186 | * |
| 2187 | * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6 |
| 2188 | * router-advertisement messages to use stateful address |
| 2189 | * auto-configuration to obtain address information (sets the M-bit). |
| 2190 | * Default is the M-bit is not set and the '<em>no</em>' option |
| 2191 | * returns it to this default state. |
| 2192 | * |
| 2193 | * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6 |
| 2194 | * router-advertisement messages that hosts use stateful auto |
| 2195 | * configuration to obtain nonaddress related information (sets |
| 2196 | * the O-bit). Default is the O-bit is not set and the '<em>no</em>' |
| 2197 | * option returns it to this default state. |
| 2198 | * |
| 2199 | * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement |
| 2200 | * messages. The '<em>no</em>' option implies to enable sending ICMPv6 |
| 2201 | * router-advertisement messages. |
| 2202 | * |
| 2203 | * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the |
| 2204 | * optional source link-layer address in the ICMPv6 router-advertisement |
| 2205 | * messages. Default is to include the optional source link-layer address |
| 2206 | * and the '<em>no</em>' option returns it to this default state. |
| 2207 | * |
| 2208 | * <em>[no] ra-send-unicast</em> - Use the source address of the |
| 2209 | * router-solicitation message if availiable. The default is to use |
| 2210 | * multicast address of all nodes, and the '<em>no</em>' option returns |
| 2211 | * it to this default state. |
| 2212 | * |
| 2213 | * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a |
| 2214 | * default router in ICMPv6 router-advertisement messages. The range is |
| 2215 | * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than |
| 2216 | * '<em><max-interval></em>'. The default value is 600 seconds and the |
| 2217 | * '<em>no</em>' option returns it to this default value. |
| 2218 | * |
| 2219 | * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6 |
| 2220 | * router-advertisement messages sent and the interval between each |
| 2221 | * message. Range for count is 1 - 3 and default is 3. Range for interval |
| 2222 | * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option |
| 2223 | * returns both to their default value. |
| 2224 | * |
| 2225 | * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the |
| 2226 | * interval between sending ICMPv6 router-advertisement messages. The |
| 2227 | * range for max-interval is from 4 to 200 seconds. min-interval can not |
| 2228 | * be more than 75% of max-interval. If not set, min-interval will be |
| 2229 | * set to 75% of max-interval. The range for min-interval is from 3 to |
| 2230 | * 150 seconds. The '<em>no</em>' option returns both to their default |
| 2231 | * value. |
| 2232 | * |
| 2233 | * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages. |
| 2234 | * The '<em>no</em>' options implies to start (or restart) sending |
| 2235 | * ICMPv6 router-advertisement messages. |
| 2236 | * |
| 2237 | * |
| 2238 | * <b>Format 2 - Prefix Options:</b> |
| 2239 | * |
| 2240 | * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> [<valid-lifetime> <pref-lifetime> | infinite] [no-advertise] [off-link] [no-autoconfig] [no-onlink]</b></em>' |
| 2241 | * |
| 2242 | * Where: |
| 2243 | * |
| 2244 | * <em>no</em> - All additional flags are ignored and the prefix is deleted. |
| 2245 | * |
| 2246 | * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the |
| 2247 | * length of time in seconds during what the prefix is valid for the purpose of |
| 2248 | * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000 |
| 2249 | * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the |
| 2250 | * length of time in seconds during what addresses generated from the prefix remain |
| 2251 | * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days). |
| 2252 | * |
| 2253 | * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>' |
| 2254 | * are inifinte, no timeout. |
| 2255 | * |
| 2256 | * <em>no-advertise</em> - Do not send full router address in prefix |
| 2257 | * advertisement. Default is to advertise (i.e. - This flag is off by default). |
| 2258 | * |
| 2259 | * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link |
| 2260 | * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can |
| 2261 | * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit. |
| 2262 | * |
| 2263 | * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet. |
| 2264 | * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default. |
| 2265 | * |
| 2266 | * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet. |
| 2267 | * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and |
| 2268 | * this prefix can be used for on-link determination). '<em>off-link</em>' also controls |
| 2269 | * the L-bit. |
| 2270 | * |
| 2271 | * |
| 2272 | * <b>Format 3: - Default of Prefix:</b> |
| 2273 | * |
| 2274 | * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>' |
| 2275 | * |
| 2276 | * When a new prefix is added (or existing one is being overwritten) <em>default</em> |
| 2277 | * uses default values for the prefix. If <em>no</em> is used, the <em>default</em> |
| 2278 | * is ignored and the prefix is deleted. |
| 2279 | * |
| 2280 | * |
| 2281 | * @cliexpar |
| 2282 | * Example of how set a router advertisement option: |
| 2283 | * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20} |
| 2284 | * Example of how to add a prefix: |
| 2285 | * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise} |
| 2286 | * Example of how to delete a prefix: |
| 2287 | * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64} |
| 2288 | ?*/ |
| 2289 | /* *INDENT-OFF* */ |
| 2290 | VLIB_CLI_COMMAND (ip6_nd_command, static) = |
| 2291 | { |
| 2292 | .path = "ip6 nd", |
| 2293 | .short_help = "ip6 nd <interface> ...", |
| 2294 | .function = ip6_ra_cmd, |
| 2295 | }; |
| 2296 | /* *INDENT-ON* */ |
| 2297 | |
| 2298 | /** |
| 2299 | * VFT for registering as a delegate to an IP6 link |
| 2300 | */ |
| 2301 | const static ip6_link_delegate_vft_t ip6_ra_delegate_vft = { |
| 2302 | .ildv_disable = ip6_ra_delegate_disable, |
| 2303 | .ildv_enable = ip6_ra_link_enable, |
| 2304 | .ildv_format = format_ip6_ra, |
| 2305 | }; |
| 2306 | |
| 2307 | static clib_error_t * |
| 2308 | ip6_ra_init (vlib_main_t * vm) |
| 2309 | { |
| 2310 | vlib_call_init_function (vm, icmp6_init); |
| 2311 | |
| 2312 | icmp6_register_type (vm, ICMP6_router_solicitation, |
| 2313 | ip6_icmp_router_solicitation_node.index); |
| 2314 | icmp6_register_type (vm, ICMP6_router_advertisement, |
| 2315 | ip6_icmp_router_advertisement_node.index); |
| 2316 | |
| 2317 | ip6_ra_delegate_id = ip6_link_delegate_register (&ip6_ra_delegate_vft); |
| 2318 | |
| 2319 | return (NULL); |
| 2320 | } |
| 2321 | |
| 2322 | /* *INDENT-OFF* */ |
| 2323 | VLIB_INIT_FUNCTION (ip6_ra_init) = |
| 2324 | { |
| 2325 | .runs_after = VLIB_INITS("icmp6_init"), |
| 2326 | }; |
| 2327 | /* *INDENT-ON* */ |
| 2328 | |
| 2329 | /* |
| 2330 | * fd.io coding-style-patch-verification: ON |
| 2331 | * |
| 2332 | * Local Variables: |
| 2333 | * eval: (c-set-style "gnu") |
| 2334 | * End: |
| 2335 | */ |