1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * This software was developed by Rui Paulo under sponsorship from the 8 * FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 #ifdef __FreeBSD__ 33 __FBSDID("$FreeBSD$"); 34 #endif 35 36 /* 37 * IEEE 802.11s Mesh Point (MBSS) support. 38 * 39 * Based on March 2009, D3.0 802.11s draft spec. 40 */ 41 #include "opt_inet.h" 42 #include "opt_wlan.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/mbuf.h> 47 #include <sys/malloc.h> 48 #include <sys/kernel.h> 49 50 #include <sys/socket.h> 51 #include <sys/sockio.h> 52 #include <sys/endian.h> 53 #include <sys/errno.h> 54 #include <sys/proc.h> 55 #include <sys/sysctl.h> 56 57 #include <net/bpf.h> 58 #include <net/if.h> 59 #include <net/if_var.h> 60 #include <net/if_media.h> 61 #include <net/if_llc.h> 62 #include <net/ethernet.h> 63 64 #include <net80211/ieee80211_var.h> 65 #include <net80211/ieee80211_action.h> 66 #ifdef IEEE80211_SUPPORT_SUPERG 67 #include <net80211/ieee80211_superg.h> 68 #endif 69 #include <net80211/ieee80211_input.h> 70 #include <net80211/ieee80211_mesh.h> 71 72 static void mesh_rt_flush_invalid(struct ieee80211vap *); 73 static int mesh_select_proto_path(struct ieee80211vap *, const char *); 74 static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 75 static void mesh_vattach(struct ieee80211vap *); 76 static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 77 static void mesh_rt_cleanup_cb(void *); 78 static void mesh_gatemode_setup(struct ieee80211vap *); 79 static void mesh_gatemode_cb(void *); 80 static void mesh_linkchange(struct ieee80211_node *, 81 enum ieee80211_mesh_mlstate); 82 static void mesh_checkid(void *, struct ieee80211_node *); 83 static uint32_t mesh_generateid(struct ieee80211vap *); 84 static int mesh_checkpseq(struct ieee80211vap *, 85 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 86 static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, 87 struct ieee80211_mesh_route *); 88 static void mesh_forward(struct ieee80211vap *, struct mbuf *, 89 const struct ieee80211_meshcntl *); 90 static int mesh_input(struct ieee80211_node *, struct mbuf *, 91 const struct ieee80211_rx_stats *rxs, int, int); 92 static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 93 const struct ieee80211_rx_stats *rxs, int, int); 94 static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 95 static void mesh_peer_timeout_setup(struct ieee80211_node *); 96 static void mesh_peer_timeout_backoff(struct ieee80211_node *); 97 static void mesh_peer_timeout_cb(void *); 98 static __inline void 99 mesh_peer_timeout_stop(struct ieee80211_node *); 100 static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 101 static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 102 static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 103 const uint8_t *); 104 uint32_t mesh_airtime_calc(struct ieee80211_node *); 105 106 /* 107 * Timeout values come from the specification and are in milliseconds. 108 */ 109 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 110 "IEEE 802.11s parameters"); 111 static int ieee80211_mesh_gateint = -1; 112 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, 113 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 114 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 115 "mesh gate interval (ms)"); 116 static int ieee80211_mesh_retrytimeout = -1; 117 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, 118 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 119 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 120 "Retry timeout (msec)"); 121 static int ieee80211_mesh_holdingtimeout = -1; 122 123 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, 124 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 125 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 126 "Holding state timeout (msec)"); 127 static int ieee80211_mesh_confirmtimeout = -1; 128 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, 129 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 130 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 131 "Confirm state timeout (msec)"); 132 static int ieee80211_mesh_backofftimeout = -1; 133 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, 134 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 135 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 136 "Backoff timeout (msec). This is to throutles peering forever when " 137 "not receiving answer or is rejected by a neighbor"); 138 static int ieee80211_mesh_maxretries = 2; 139 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW, 140 &ieee80211_mesh_maxretries, 0, 141 "Maximum retries during peer link establishment"); 142 static int ieee80211_mesh_maxholding = 2; 143 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW, 144 &ieee80211_mesh_maxholding, 0, 145 "Maximum times we are allowed to transition to HOLDING state before " 146 "backinoff during peer link establishment"); 147 148 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 149 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 150 151 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 152 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 153 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 154 static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 155 static ieee80211_recv_action_func mesh_recv_action_meshgate; 156 157 static ieee80211_send_action_func mesh_send_action_meshpeering_open; 158 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 159 static ieee80211_send_action_func mesh_send_action_meshpeering_close; 160 static ieee80211_send_action_func mesh_send_action_meshlmetric; 161 static ieee80211_send_action_func mesh_send_action_meshgate; 162 163 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 164 .mpm_descr = "AIRTIME", 165 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 166 .mpm_metric = mesh_airtime_calc, 167 }; 168 169 static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 170 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 171 172 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 173 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 174 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 175 176 /* The longer one of the lifetime should be stored as new lifetime */ 177 #define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 178 179 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 180 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 181 182 /* 183 * Helper functions to manipulate the Mesh routing table. 184 */ 185 186 static struct ieee80211_mesh_route * 187 mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 188 const uint8_t dest[IEEE80211_ADDR_LEN]) 189 { 190 struct ieee80211_mesh_route *rt; 191 192 MESH_RT_LOCK_ASSERT(ms); 193 194 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 195 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 196 return rt; 197 } 198 return NULL; 199 } 200 201 static struct ieee80211_mesh_route * 202 mesh_rt_add_locked(struct ieee80211vap *vap, 203 const uint8_t dest[IEEE80211_ADDR_LEN]) 204 { 205 struct ieee80211_mesh_state *ms = vap->iv_mesh; 206 struct ieee80211_mesh_route *rt; 207 208 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 209 ("%s: adding broadcast to the routing table", __func__)); 210 211 MESH_RT_LOCK_ASSERT(ms); 212 213 rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) + 214 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, 215 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 216 if (rt != NULL) { 217 rt->rt_vap = vap; 218 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 219 rt->rt_priv = (void *)ALIGN(&rt[1]); 220 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT"); 221 callout_init(&rt->rt_discovery, 1); 222 rt->rt_updtime = ticks; /* create time */ 223 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 224 } 225 return rt; 226 } 227 228 struct ieee80211_mesh_route * 229 ieee80211_mesh_rt_find(struct ieee80211vap *vap, 230 const uint8_t dest[IEEE80211_ADDR_LEN]) 231 { 232 struct ieee80211_mesh_state *ms = vap->iv_mesh; 233 struct ieee80211_mesh_route *rt; 234 235 MESH_RT_LOCK(ms); 236 rt = mesh_rt_find_locked(ms, dest); 237 MESH_RT_UNLOCK(ms); 238 return rt; 239 } 240 241 struct ieee80211_mesh_route * 242 ieee80211_mesh_rt_add(struct ieee80211vap *vap, 243 const uint8_t dest[IEEE80211_ADDR_LEN]) 244 { 245 struct ieee80211_mesh_state *ms = vap->iv_mesh; 246 struct ieee80211_mesh_route *rt; 247 248 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 249 ("%s: duplicate entry in the routing table", __func__)); 250 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 251 ("%s: adding self to the routing table", __func__)); 252 253 MESH_RT_LOCK(ms); 254 rt = mesh_rt_add_locked(vap, dest); 255 MESH_RT_UNLOCK(ms); 256 return rt; 257 } 258 259 /* 260 * Update the route lifetime and returns the updated lifetime. 261 * If new_lifetime is zero and route is timedout it will be invalidated. 262 * new_lifetime is in msec 263 */ 264 int 265 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 266 { 267 int timesince, now; 268 uint32_t lifetime = 0; 269 270 KASSERT(rt != NULL, ("route is NULL")); 271 272 now = ticks; 273 MESH_RT_ENTRY_LOCK(rt); 274 275 /* dont clobber a proxy entry gated by us */ 276 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 277 MESH_RT_ENTRY_UNLOCK(rt); 278 return rt->rt_lifetime; 279 } 280 281 timesince = ticks_to_msecs(now - rt->rt_updtime); 282 rt->rt_updtime = now; 283 if (timesince >= rt->rt_lifetime) { 284 if (new_lifetime != 0) { 285 rt->rt_lifetime = new_lifetime; 286 } 287 else { 288 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 289 rt->rt_lifetime = 0; 290 } 291 } else { 292 /* update what is left of lifetime */ 293 rt->rt_lifetime = rt->rt_lifetime - timesince; 294 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 295 new_lifetime, rt->rt_lifetime); 296 } 297 lifetime = rt->rt_lifetime; 298 MESH_RT_ENTRY_UNLOCK(rt); 299 300 return lifetime; 301 } 302 303 /* 304 * Add a proxy route (as needed) for the specified destination. 305 */ 306 void 307 ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 308 const uint8_t dest[IEEE80211_ADDR_LEN]) 309 { 310 struct ieee80211_mesh_state *ms = vap->iv_mesh; 311 struct ieee80211_mesh_route *rt; 312 313 MESH_RT_LOCK(ms); 314 rt = mesh_rt_find_locked(ms, dest); 315 if (rt == NULL) { 316 rt = mesh_rt_add_locked(vap, dest); 317 if (rt == NULL) { 318 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 319 "%s", "unable to add proxy entry"); 320 vap->iv_stats.is_mesh_rtaddfailed++; 321 } else { 322 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 323 "%s", "add proxy entry"); 324 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 325 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 326 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 327 | IEEE80211_MESHRT_FLAGS_PROXY; 328 } 329 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 330 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 331 ("no proxy flag for poxy entry")); 332 struct ieee80211com *ic = vap->iv_ic; 333 /* 334 * Fix existing entry created by received frames from 335 * stations that have some memory of dest. We also 336 * flush any frames held on the staging queue; delivering 337 * them is too much trouble right now. 338 */ 339 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 340 "%s", "fix proxy entry"); 341 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 342 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 343 | IEEE80211_MESHRT_FLAGS_PROXY; 344 /* XXX belongs in hwmp */ 345 ieee80211_ageq_drain_node(&ic->ic_stageq, 346 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 347 /* XXX stat? */ 348 } 349 MESH_RT_UNLOCK(ms); 350 } 351 352 static __inline void 353 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 354 { 355 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 356 /* 357 * Grab the lock before destroying it, to be sure no one else 358 * is holding the route. 359 */ 360 MESH_RT_ENTRY_LOCK(rt); 361 callout_drain(&rt->rt_discovery); 362 MESH_RT_ENTRY_LOCK_DESTROY(rt); 363 IEEE80211_FREE(rt, M_80211_MESH_RT); 364 } 365 366 void 367 ieee80211_mesh_rt_del(struct ieee80211vap *vap, 368 const uint8_t dest[IEEE80211_ADDR_LEN]) 369 { 370 struct ieee80211_mesh_state *ms = vap->iv_mesh; 371 struct ieee80211_mesh_route *rt, *next; 372 373 MESH_RT_LOCK(ms); 374 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 375 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 376 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 377 ms->ms_ppath->mpp_senderror(vap, dest, rt, 378 IEEE80211_REASON_MESH_PERR_NO_PROXY); 379 } else { 380 ms->ms_ppath->mpp_senderror(vap, dest, rt, 381 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 382 } 383 mesh_rt_del(ms, rt); 384 MESH_RT_UNLOCK(ms); 385 return; 386 } 387 } 388 MESH_RT_UNLOCK(ms); 389 } 390 391 void 392 ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 393 { 394 struct ieee80211_mesh_state *ms = vap->iv_mesh; 395 struct ieee80211_mesh_route *rt, *next; 396 397 if (ms == NULL) 398 return; 399 MESH_RT_LOCK(ms); 400 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 401 mesh_rt_del(ms, rt); 402 MESH_RT_UNLOCK(ms); 403 } 404 405 void 406 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 407 const uint8_t peer[IEEE80211_ADDR_LEN]) 408 { 409 struct ieee80211_mesh_state *ms = vap->iv_mesh; 410 struct ieee80211_mesh_route *rt, *next; 411 412 MESH_RT_LOCK(ms); 413 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 414 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 415 mesh_rt_del(ms, rt); 416 } 417 MESH_RT_UNLOCK(ms); 418 } 419 420 /* 421 * Flush expired routing entries, i.e. those in invalid state for 422 * some time. 423 */ 424 static void 425 mesh_rt_flush_invalid(struct ieee80211vap *vap) 426 { 427 struct ieee80211_mesh_state *ms = vap->iv_mesh; 428 struct ieee80211_mesh_route *rt, *next; 429 430 if (ms == NULL) 431 return; 432 MESH_RT_LOCK(ms); 433 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 434 /* Discover paths will be deleted by their own callout */ 435 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 436 continue; 437 ieee80211_mesh_rt_update(rt, 0); 438 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 439 mesh_rt_del(ms, rt); 440 } 441 MESH_RT_UNLOCK(ms); 442 } 443 444 int 445 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 446 { 447 int i, firstempty = -1; 448 449 for (i = 0; i < nitems(mesh_proto_paths); i++) { 450 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 451 IEEE80211_MESH_PROTO_DSZ) == 0) 452 return EEXIST; 453 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 454 firstempty = i; 455 } 456 if (firstempty < 0) 457 return ENOSPC; 458 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 459 mesh_proto_paths[firstempty].mpp_active = 1; 460 return 0; 461 } 462 463 int 464 ieee80211_mesh_register_proto_metric(const struct 465 ieee80211_mesh_proto_metric *mpm) 466 { 467 int i, firstempty = -1; 468 469 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 470 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 471 IEEE80211_MESH_PROTO_DSZ) == 0) 472 return EEXIST; 473 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 474 firstempty = i; 475 } 476 if (firstempty < 0) 477 return ENOSPC; 478 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 479 mesh_proto_metrics[firstempty].mpm_active = 1; 480 return 0; 481 } 482 483 static int 484 mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 485 { 486 struct ieee80211_mesh_state *ms = vap->iv_mesh; 487 int i; 488 489 for (i = 0; i < nitems(mesh_proto_paths); i++) { 490 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 491 ms->ms_ppath = &mesh_proto_paths[i]; 492 return 0; 493 } 494 } 495 return ENOENT; 496 } 497 498 static int 499 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 500 { 501 struct ieee80211_mesh_state *ms = vap->iv_mesh; 502 int i; 503 504 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 505 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 506 ms->ms_pmetric = &mesh_proto_metrics[i]; 507 return 0; 508 } 509 } 510 return ENOENT; 511 } 512 513 static void 514 mesh_gatemode_setup(struct ieee80211vap *vap) 515 { 516 struct ieee80211_mesh_state *ms = vap->iv_mesh; 517 518 /* 519 * NB: When a mesh gate is running as a ROOT it shall 520 * not send out periodic GANNs but instead mark the 521 * mesh gate flag for the corresponding proactive PREQ 522 * and RANN frames. 523 */ 524 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 525 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 526 callout_drain(&ms->ms_gatetimer); 527 return ; 528 } 529 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 530 mesh_gatemode_cb, vap); 531 } 532 533 static void 534 mesh_gatemode_cb(void *arg) 535 { 536 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 537 struct ieee80211_mesh_state *ms = vap->iv_mesh; 538 struct ieee80211_meshgann_ie gann; 539 540 gann.gann_flags = 0; /* Reserved */ 541 gann.gann_hopcount = 0; 542 gann.gann_ttl = ms->ms_ttl; 543 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 544 gann.gann_seq = ms->ms_gateseq++; 545 gann.gann_interval = ieee80211_mesh_gateint; 546 547 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 548 "send broadcast GANN (seq %u)", gann.gann_seq); 549 550 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 551 IEEE80211_ACTION_MESH_GANN, &gann); 552 mesh_gatemode_setup(vap); 553 } 554 555 static void 556 ieee80211_mesh_init(void) 557 { 558 559 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 560 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 561 562 /* 563 * Setup mesh parameters that depends on the clock frequency. 564 */ 565 ieee80211_mesh_gateint = msecs_to_ticks(10000); 566 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 567 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 568 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 569 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 570 571 /* 572 * Register action frame handlers. 573 */ 574 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 575 IEEE80211_ACTION_MESHPEERING_OPEN, 576 mesh_recv_action_meshpeering_open); 577 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 578 IEEE80211_ACTION_MESHPEERING_CONFIRM, 579 mesh_recv_action_meshpeering_confirm); 580 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 581 IEEE80211_ACTION_MESHPEERING_CLOSE, 582 mesh_recv_action_meshpeering_close); 583 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 584 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 585 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 586 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 587 588 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 589 IEEE80211_ACTION_MESHPEERING_OPEN, 590 mesh_send_action_meshpeering_open); 591 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 592 IEEE80211_ACTION_MESHPEERING_CONFIRM, 593 mesh_send_action_meshpeering_confirm); 594 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 595 IEEE80211_ACTION_MESHPEERING_CLOSE, 596 mesh_send_action_meshpeering_close); 597 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 598 IEEE80211_ACTION_MESH_LMETRIC, 599 mesh_send_action_meshlmetric); 600 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 601 IEEE80211_ACTION_MESH_GANN, 602 mesh_send_action_meshgate); 603 604 /* 605 * Register Airtime Link Metric. 606 */ 607 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 608 609 } 610 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 611 612 void 613 ieee80211_mesh_attach(struct ieee80211com *ic) 614 { 615 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 616 } 617 618 void 619 ieee80211_mesh_detach(struct ieee80211com *ic) 620 { 621 } 622 623 static void 624 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 625 { 626 struct ieee80211com *ic = ni->ni_ic; 627 uint16_t args[3]; 628 629 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 630 args[0] = ni->ni_mlpid; 631 args[1] = ni->ni_mllid; 632 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 633 ieee80211_send_action(ni, 634 IEEE80211_ACTION_CAT_SELF_PROT, 635 IEEE80211_ACTION_MESHPEERING_CLOSE, 636 args); 637 } 638 callout_drain(&ni->ni_mltimer); 639 /* XXX belongs in hwmp */ 640 ieee80211_ageq_drain_node(&ic->ic_stageq, 641 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 642 } 643 644 static void 645 mesh_vdetach(struct ieee80211vap *vap) 646 { 647 struct ieee80211_mesh_state *ms = vap->iv_mesh; 648 649 callout_drain(&ms->ms_cleantimer); 650 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 651 NULL); 652 ieee80211_mesh_rt_flush(vap); 653 MESH_RT_LOCK_DESTROY(ms); 654 ms->ms_ppath->mpp_vdetach(vap); 655 IEEE80211_FREE(vap->iv_mesh, M_80211_VAP); 656 vap->iv_mesh = NULL; 657 } 658 659 static void 660 mesh_vattach(struct ieee80211vap *vap) 661 { 662 struct ieee80211_mesh_state *ms; 663 vap->iv_newstate = mesh_newstate; 664 vap->iv_input = mesh_input; 665 vap->iv_opdetach = mesh_vdetach; 666 vap->iv_recv_mgmt = mesh_recv_mgmt; 667 vap->iv_recv_ctl = mesh_recv_ctl; 668 ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 669 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 670 if (ms == NULL) { 671 printf("%s: couldn't alloc MBSS state\n", __func__); 672 return; 673 } 674 vap->iv_mesh = ms; 675 ms->ms_seq = 0; 676 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 677 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 678 TAILQ_INIT(&ms->ms_known_gates); 679 TAILQ_INIT(&ms->ms_routes); 680 MESH_RT_LOCK_INIT(ms, "MBSS"); 681 callout_init(&ms->ms_cleantimer, 1); 682 callout_init(&ms->ms_gatetimer, 1); 683 ms->ms_gateseq = 0; 684 mesh_select_proto_metric(vap, "AIRTIME"); 685 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 686 mesh_select_proto_path(vap, "HWMP"); 687 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 688 ms->ms_ppath->mpp_vattach(vap); 689 } 690 691 /* 692 * IEEE80211_M_MBSS vap state machine handler. 693 */ 694 static int 695 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 696 { 697 struct ieee80211_mesh_state *ms = vap->iv_mesh; 698 struct ieee80211com *ic = vap->iv_ic; 699 struct ieee80211_node *ni; 700 enum ieee80211_state ostate; 701 702 IEEE80211_LOCK_ASSERT(ic); 703 704 ostate = vap->iv_state; 705 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 706 __func__, ieee80211_state_name[ostate], 707 ieee80211_state_name[nstate], arg); 708 vap->iv_state = nstate; /* state transition */ 709 if (ostate != IEEE80211_S_SCAN) 710 ieee80211_cancel_scan(vap); /* background scan */ 711 ni = vap->iv_bss; /* NB: no reference held */ 712 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 713 callout_drain(&ms->ms_cleantimer); 714 callout_drain(&ms->ms_gatetimer); 715 } 716 switch (nstate) { 717 case IEEE80211_S_INIT: 718 switch (ostate) { 719 case IEEE80211_S_SCAN: 720 ieee80211_cancel_scan(vap); 721 break; 722 case IEEE80211_S_CAC: 723 ieee80211_dfs_cac_stop(vap); 724 break; 725 case IEEE80211_S_RUN: 726 ieee80211_iterate_nodes(&ic->ic_sta, 727 mesh_vdetach_peers, NULL); 728 break; 729 default: 730 break; 731 } 732 if (ostate != IEEE80211_S_INIT) { 733 /* NB: optimize INIT -> INIT case */ 734 ieee80211_reset_bss(vap); 735 ieee80211_mesh_rt_flush(vap); 736 } 737 break; 738 case IEEE80211_S_SCAN: 739 switch (ostate) { 740 case IEEE80211_S_INIT: 741 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 742 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 743 ms->ms_idlen != 0) { 744 /* 745 * Already have a channel and a mesh ID; bypass 746 * the scan and startup immediately. 747 */ 748 ieee80211_create_ibss(vap, vap->iv_des_chan); 749 break; 750 } 751 /* 752 * Initiate a scan. We can come here as a result 753 * of an IEEE80211_IOC_SCAN_REQ too in which case 754 * the vap will be marked with IEEE80211_FEXT_SCANREQ 755 * and the scan request parameters will be present 756 * in iv_scanreq. Otherwise we do the default. 757 */ 758 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 759 ieee80211_check_scan(vap, 760 vap->iv_scanreq_flags, 761 vap->iv_scanreq_duration, 762 vap->iv_scanreq_mindwell, 763 vap->iv_scanreq_maxdwell, 764 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 765 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 766 } else 767 ieee80211_check_scan_current(vap); 768 break; 769 default: 770 break; 771 } 772 break; 773 case IEEE80211_S_CAC: 774 /* 775 * Start CAC on a DFS channel. We come here when starting 776 * a bss on a DFS channel (see ieee80211_create_ibss). 777 */ 778 ieee80211_dfs_cac_start(vap); 779 break; 780 case IEEE80211_S_RUN: 781 switch (ostate) { 782 case IEEE80211_S_INIT: 783 /* 784 * Already have a channel; bypass the 785 * scan and startup immediately. 786 * Note that ieee80211_create_ibss will call 787 * back to do a RUN->RUN state change. 788 */ 789 ieee80211_create_ibss(vap, 790 ieee80211_ht_adjust_channel(ic, 791 ic->ic_curchan, vap->iv_flags_ht)); 792 /* NB: iv_bss is changed on return */ 793 break; 794 case IEEE80211_S_CAC: 795 /* 796 * NB: This is the normal state change when CAC 797 * expires and no radar was detected; no need to 798 * clear the CAC timer as it's already expired. 799 */ 800 /* fall thru... */ 801 case IEEE80211_S_CSA: 802 #if 0 803 /* 804 * Shorten inactivity timer of associated stations 805 * to weed out sta's that don't follow a CSA. 806 */ 807 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 808 #endif 809 /* 810 * Update bss node channel to reflect where 811 * we landed after CSA. 812 */ 813 ieee80211_node_set_chan(ni, 814 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 815 ieee80211_htchanflags(ni->ni_chan))); 816 /* XXX bypass debug msgs */ 817 break; 818 case IEEE80211_S_SCAN: 819 case IEEE80211_S_RUN: 820 #ifdef IEEE80211_DEBUG 821 if (ieee80211_msg_debug(vap)) { 822 ieee80211_note(vap, 823 "synchronized with %s meshid ", 824 ether_sprintf(ni->ni_meshid)); 825 ieee80211_print_essid(ni->ni_meshid, 826 ni->ni_meshidlen); 827 /* XXX MCS/HT */ 828 printf(" channel %d\n", 829 ieee80211_chan2ieee(ic, ic->ic_curchan)); 830 } 831 #endif 832 break; 833 default: 834 break; 835 } 836 ieee80211_node_authorize(ni); 837 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 838 mesh_rt_cleanup_cb, vap); 839 mesh_gatemode_setup(vap); 840 break; 841 default: 842 break; 843 } 844 /* NB: ostate not nstate */ 845 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 846 return 0; 847 } 848 849 static void 850 mesh_rt_cleanup_cb(void *arg) 851 { 852 struct ieee80211vap *vap = arg; 853 struct ieee80211_mesh_state *ms = vap->iv_mesh; 854 855 mesh_rt_flush_invalid(vap); 856 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 857 mesh_rt_cleanup_cb, vap); 858 } 859 860 /* 861 * Mark a mesh STA as gate and return a pointer to it. 862 * If this is first time, we create a new gate route. 863 * Always update the path route to this mesh gate. 864 */ 865 struct ieee80211_mesh_gate_route * 866 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 867 struct ieee80211_mesh_route *rt) 868 { 869 struct ieee80211_mesh_state *ms = vap->iv_mesh; 870 struct ieee80211_mesh_gate_route *gr = NULL, *next; 871 int found = 0; 872 873 MESH_RT_LOCK(ms); 874 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 875 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 876 found = 1; 877 break; 878 } 879 } 880 881 if (!found) { 882 /* New mesh gate add it to known table. */ 883 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 884 "%s", "stored new gate information from pro-PREQ."); 885 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 886 M_80211_MESH_GT_RT, 887 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 888 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 889 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 890 } 891 gr->gr_route = rt; 892 /* TODO: link from path route to gate route */ 893 MESH_RT_UNLOCK(ms); 894 895 return gr; 896 } 897 898 899 /* 900 * Helper function to note the Mesh Peer Link FSM change. 901 */ 902 static void 903 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 904 { 905 struct ieee80211vap *vap = ni->ni_vap; 906 struct ieee80211_mesh_state *ms = vap->iv_mesh; 907 #ifdef IEEE80211_DEBUG 908 static const char *meshlinkstates[] = { 909 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 910 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 911 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 912 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 913 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 914 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 915 }; 916 #endif 917 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 918 ni, "peer link: %s -> %s", 919 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 920 921 /* track neighbor count */ 922 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 923 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 924 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 925 ms->ms_neighbors++; 926 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 927 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 928 state != IEEE80211_NODE_MESH_ESTABLISHED) { 929 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 930 ms->ms_neighbors--; 931 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 932 } 933 ni->ni_mlstate = state; 934 switch (state) { 935 case IEEE80211_NODE_MESH_HOLDING: 936 ms->ms_ppath->mpp_peerdown(ni); 937 break; 938 case IEEE80211_NODE_MESH_ESTABLISHED: 939 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 940 break; 941 default: 942 break; 943 } 944 } 945 946 /* 947 * Helper function to generate a unique local ID required for mesh 948 * peer establishment. 949 */ 950 static void 951 mesh_checkid(void *arg, struct ieee80211_node *ni) 952 { 953 uint16_t *r = arg; 954 955 if (*r == ni->ni_mllid) 956 *(uint16_t *)arg = 0; 957 } 958 959 static uint32_t 960 mesh_generateid(struct ieee80211vap *vap) 961 { 962 int maxiter = 4; 963 uint16_t r; 964 965 do { 966 get_random_bytes(&r, 2); 967 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 968 maxiter--; 969 } while (r == 0 && maxiter > 0); 970 return r; 971 } 972 973 /* 974 * Verifies if we already received this packet by checking its 975 * sequence number. 976 * Returns 0 if the frame is to be accepted, 1 otherwise. 977 */ 978 static int 979 mesh_checkpseq(struct ieee80211vap *vap, 980 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 981 { 982 struct ieee80211_mesh_route *rt; 983 984 rt = ieee80211_mesh_rt_find(vap, source); 985 if (rt == NULL) { 986 rt = ieee80211_mesh_rt_add(vap, source); 987 if (rt == NULL) { 988 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 989 "%s", "add mcast route failed"); 990 vap->iv_stats.is_mesh_rtaddfailed++; 991 return 1; 992 } 993 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 994 "add mcast route, mesh seqno %d", seq); 995 rt->rt_lastmseq = seq; 996 return 0; 997 } 998 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 999 return 1; 1000 } else { 1001 rt->rt_lastmseq = seq; 1002 return 0; 1003 } 1004 } 1005 1006 /* 1007 * Iterate the routing table and locate the next hop. 1008 */ 1009 struct ieee80211_node * 1010 ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1011 const uint8_t dest[IEEE80211_ADDR_LEN]) 1012 { 1013 struct ieee80211_mesh_route *rt; 1014 1015 rt = ieee80211_mesh_rt_find(vap, dest); 1016 if (rt == NULL) 1017 return NULL; 1018 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1019 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1020 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1021 /* XXX stat */ 1022 return NULL; 1023 } 1024 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1025 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1026 if (rt == NULL) return NULL; 1027 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1028 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1029 "%s: meshgate !valid, flags 0x%x", __func__, 1030 rt->rt_flags); 1031 /* XXX stat */ 1032 return NULL; 1033 } 1034 } 1035 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1036 } 1037 1038 static void 1039 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1040 struct ieee80211_mesh_route *rt_gate) 1041 { 1042 struct ifnet *ifp = vap->iv_ifp; 1043 struct ieee80211_node *ni; 1044 1045 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1046 1047 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1048 if (ni == NULL) { 1049 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1050 m_freem(m); 1051 return; 1052 } 1053 1054 /* 1055 * Send through the VAP packet transmit path. 1056 * This consumes the node ref grabbed above and 1057 * the mbuf, regardless of whether there's a problem 1058 * or not. 1059 */ 1060 (void) ieee80211_vap_pkt_send_dest(vap, m, ni); 1061 } 1062 1063 /* 1064 * Forward the queued frames to known valid mesh gates. 1065 * Assume destination to be outside the MBSS (i.e. proxy entry), 1066 * If no valid mesh gates are known silently discard queued frames. 1067 * After transmitting frames to all known valid mesh gates, this route 1068 * will be marked invalid, and a new path discovery will happen in the hopes 1069 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1070 */ 1071 void 1072 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1073 struct ieee80211_mesh_route *rt_dest) 1074 { 1075 struct ieee80211com *ic = vap->iv_ic; 1076 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1077 struct ieee80211_mesh_route *rt_gate; 1078 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1079 struct mbuf *m, *mcopy, *next; 1080 1081 IEEE80211_TX_UNLOCK_ASSERT(ic); 1082 1083 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1084 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1085 1086 /* XXX: send to more than one valid mash gate */ 1087 MESH_RT_LOCK(ms); 1088 1089 m = ieee80211_ageq_remove(&ic->ic_stageq, 1090 (struct ieee80211_node *)(uintptr_t) 1091 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1092 1093 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1094 rt_gate = gr->gr_route; 1095 if (rt_gate == NULL) { 1096 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1097 rt_dest->rt_dest, 1098 "mesh gate with no path %6D", 1099 gr->gr_addr, ":"); 1100 continue; 1101 } 1102 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1103 continue; 1104 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1105 ("route not marked as a mesh gate")); 1106 KASSERT((rt_gate->rt_flags & 1107 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1108 ("found mesh gate that is also marked porxy")); 1109 /* 1110 * convert route to a proxy route gated by the current 1111 * mesh gate, this is needed so encap can built data 1112 * frame with correct address. 1113 */ 1114 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1115 IEEE80211_MESHRT_FLAGS_VALID; 1116 rt_dest->rt_ext_seq = 1; /* random value */ 1117 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1118 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1119 rt_dest->rt_metric = rt_gate->rt_metric; 1120 rt_dest->rt_nhops = rt_gate->rt_nhops; 1121 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1122 MESH_RT_UNLOCK(ms); 1123 /* XXX: lock?? */ 1124 mcopy = m_dup(m, M_NOWAIT); 1125 for (; mcopy != NULL; mcopy = next) { 1126 next = mcopy->m_nextpkt; 1127 mcopy->m_nextpkt = NULL; 1128 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1129 rt_dest->rt_dest, 1130 "flush queued frame %p len %d", mcopy, 1131 mcopy->m_pkthdr.len); 1132 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1133 } 1134 MESH_RT_LOCK(ms); 1135 } 1136 rt_dest->rt_flags = 0; /* Mark invalid */ 1137 m_freem(m); 1138 MESH_RT_UNLOCK(ms); 1139 } 1140 1141 /* 1142 * Forward the specified frame. 1143 * Decrement the TTL and set TA to our MAC address. 1144 */ 1145 static void 1146 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1147 const struct ieee80211_meshcntl *mc) 1148 { 1149 struct ieee80211com *ic = vap->iv_ic; 1150 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1151 struct ifnet *ifp = vap->iv_ifp; 1152 const struct ieee80211_frame *wh = 1153 mtod(m, const struct ieee80211_frame *); 1154 struct mbuf *mcopy; 1155 struct ieee80211_meshcntl *mccopy; 1156 struct ieee80211_frame *whcopy; 1157 struct ieee80211_node *ni; 1158 int err; 1159 1160 /* This is called from the RX path - don't hold this lock */ 1161 IEEE80211_TX_UNLOCK_ASSERT(ic); 1162 1163 /* 1164 * mesh ttl of 1 means we are the last one receiving it, 1165 * according to amendment we decrement and then check if 1166 * 0, if so we dont forward. 1167 */ 1168 if (mc->mc_ttl < 1) { 1169 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1170 "%s", "frame not fwd'd, ttl 1"); 1171 vap->iv_stats.is_mesh_fwd_ttl++; 1172 return; 1173 } 1174 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1175 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1176 "%s", "frame not fwd'd, fwding disabled"); 1177 vap->iv_stats.is_mesh_fwd_disabled++; 1178 return; 1179 } 1180 mcopy = m_dup(m, M_NOWAIT); 1181 if (mcopy == NULL) { 1182 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1183 "%s", "frame not fwd'd, cannot dup"); 1184 vap->iv_stats.is_mesh_fwd_nobuf++; 1185 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1186 return; 1187 } 1188 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1189 sizeof(struct ieee80211_meshcntl)); 1190 if (mcopy == NULL) { 1191 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1192 "%s", "frame not fwd'd, too short"); 1193 vap->iv_stats.is_mesh_fwd_tooshort++; 1194 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1195 m_freem(mcopy); 1196 return; 1197 } 1198 whcopy = mtod(mcopy, struct ieee80211_frame *); 1199 mccopy = (struct ieee80211_meshcntl *) 1200 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1201 /* XXX clear other bits? */ 1202 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1203 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1204 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1205 ni = ieee80211_ref_node(vap->iv_bss); 1206 mcopy->m_flags |= M_MCAST; 1207 } else { 1208 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1209 if (ni == NULL) { 1210 /* 1211 * [Optional] any of the following three actions: 1212 * o silently discard 1213 * o trigger a path discovery 1214 * o inform TA that meshDA is unknown. 1215 */ 1216 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1217 "%s", "frame not fwd'd, no path"); 1218 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1219 IEEE80211_REASON_MESH_PERR_NO_FI); 1220 vap->iv_stats.is_mesh_fwd_nopath++; 1221 m_freem(mcopy); 1222 return; 1223 } 1224 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1225 } 1226 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1227 mccopy->mc_ttl--; 1228 1229 /* XXX calculate priority so drivers can find the tx queue */ 1230 M_WME_SETAC(mcopy, WME_AC_BE); 1231 1232 /* XXX do we know m_nextpkt is NULL? */ 1233 MPASS((mcopy->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0); 1234 mcopy->m_pkthdr.rcvif = (void *) ni; 1235 1236 /* 1237 * XXX this bypasses all of the VAP TX handling; it passes frames 1238 * directly to the parent interface. 1239 * 1240 * Because of this, there's no TX lock being held as there's no 1241 * encaps state being used. 1242 * 1243 * Doing a direct parent transmit may not be the correct thing 1244 * to do here; we'll have to re-think this soon. 1245 */ 1246 IEEE80211_TX_LOCK(ic); 1247 err = ieee80211_parent_xmitpkt(ic, mcopy); 1248 IEEE80211_TX_UNLOCK(ic); 1249 if (!err) 1250 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1251 } 1252 1253 static struct mbuf * 1254 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1255 { 1256 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1257 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1258 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1259 sizeof(struct ieee80211_meshcntl_ae10)]; 1260 const struct ieee80211_qosframe_addr4 *wh; 1261 const struct ieee80211_meshcntl_ae10 *mc; 1262 struct ether_header *eh; 1263 struct llc *llc; 1264 int ae; 1265 1266 if (m->m_len < hdrlen + sizeof(*llc) && 1267 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1268 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1269 "discard data frame: %s", "m_pullup failed"); 1270 vap->iv_stats.is_rx_tooshort++; 1271 return NULL; 1272 } 1273 memcpy(b, mtod(m, caddr_t), hdrlen); 1274 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1275 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1276 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1277 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1278 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1279 1280 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1281 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1282 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1283 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1284 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1285 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1286 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1287 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1288 llc = NULL; 1289 } else { 1290 m_adj(m, hdrlen - sizeof(*eh)); 1291 } 1292 eh = mtod(m, struct ether_header *); 1293 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1294 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1295 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1296 if (ae == IEEE80211_MESH_AE_00) { 1297 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1298 } else if (ae == IEEE80211_MESH_AE_01) { 1299 IEEE80211_ADDR_COPY(eh->ether_shost, 1300 MC01(mc)->mc_addr4); 1301 } else { 1302 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1303 (const struct ieee80211_frame *)wh, NULL, 1304 "bad AE %d", ae); 1305 vap->iv_stats.is_mesh_badae++; 1306 m_freem(m); 1307 return NULL; 1308 } 1309 } else { 1310 if (ae == IEEE80211_MESH_AE_00) { 1311 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1312 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1313 } else if (ae == IEEE80211_MESH_AE_10) { 1314 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1315 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1316 } else { 1317 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1318 (const struct ieee80211_frame *)wh, NULL, 1319 "bad AE %d", ae); 1320 vap->iv_stats.is_mesh_badae++; 1321 m_freem(m); 1322 return NULL; 1323 } 1324 } 1325 #ifndef __NO_STRICT_ALIGNMENT 1326 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1327 m = ieee80211_realign(vap, m, sizeof(*eh)); 1328 if (m == NULL) 1329 return NULL; 1330 } 1331 #endif /* !__NO_STRICT_ALIGNMENT */ 1332 if (llc != NULL) { 1333 eh = mtod(m, struct ether_header *); 1334 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1335 } 1336 return m; 1337 #undef WDIR 1338 #undef MC01 1339 } 1340 1341 /* 1342 * Return non-zero if the unicast mesh data frame should be processed 1343 * locally. Frames that are not proxy'd have our address, otherwise 1344 * we need to consult the routing table to look for a proxy entry. 1345 */ 1346 static __inline int 1347 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1348 const struct ieee80211_meshcntl *mc) 1349 { 1350 int ae = mc->mc_flags & 3; 1351 1352 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1353 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1354 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1355 ("bad AE %d", ae)); 1356 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1357 const struct ieee80211_meshcntl_ae10 *mc10 = 1358 (const struct ieee80211_meshcntl_ae10 *) mc; 1359 struct ieee80211_mesh_route *rt = 1360 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1361 /* check for proxy route to ourself */ 1362 return (rt != NULL && 1363 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1364 } else /* ucast w/o proxy */ 1365 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1366 } 1367 1368 /* 1369 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1370 * > 0 means we have forwarded data and no need to process locally 1371 * == 0 means we want to process locally (and we may have forwarded data 1372 * < 0 means there was an error and data should be discarded 1373 */ 1374 static int 1375 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1376 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1377 { 1378 struct ieee80211_qosframe_addr4 *qwh; 1379 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1380 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1381 1382 /* This is called from the RX path - don't hold this lock */ 1383 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1384 1385 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1386 1387 /* 1388 * TODO: 1389 * o verify addr2 is a legitimate transmitter 1390 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1391 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1392 */ 1393 1394 /* set lifetime of addr3 (meshDA) to initial value */ 1395 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1396 if (rt_meshda == NULL) { 1397 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1398 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1399 /* 1400 * [Optional] any of the following three actions: 1401 * o silently discard [X] 1402 * o trigger a path discovery [ ] 1403 * o inform TA that meshDA is unknown. [ ] 1404 */ 1405 /* XXX: stats */ 1406 return (-1); 1407 } 1408 1409 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1410 ms->ms_ppath->mpp_inact)); 1411 1412 /* set lifetime of addr4 (meshSA) to initial value */ 1413 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1414 KASSERT(rt_meshsa != NULL, ("no route")); 1415 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1416 ms->ms_ppath->mpp_inact)); 1417 1418 mesh_forward(vap, m, mc); 1419 return (1); /* dont process locally */ 1420 } 1421 1422 /* 1423 * Verifies transmitter, updates lifetime, precursor list and process data 1424 * locally, if data is proxy with AE = 10 it could mean data should go 1425 * on another mesh path or data should be forwarded to the DS. 1426 * 1427 * > 0 means we have forwarded data and no need to process locally 1428 * == 0 means we want to process locally (and we may have forwarded data 1429 * < 0 means there was an error and data should be discarded 1430 */ 1431 static int 1432 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1433 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1434 { 1435 struct ieee80211_qosframe_addr4 *qwh; 1436 const struct ieee80211_meshcntl_ae10 *mc10; 1437 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1438 struct ieee80211_mesh_route *rt; 1439 int ae; 1440 1441 /* This is called from the RX path - don't hold this lock */ 1442 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1443 1444 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1445 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1446 1447 /* 1448 * TODO: 1449 * o verify addr2 is a legitimate transmitter 1450 * o lifetime of precursor entry is max(init, curr) 1451 */ 1452 1453 /* set lifetime of addr4 (meshSA) to initial value */ 1454 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1455 KASSERT(rt != NULL, ("no route")); 1456 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1457 rt = NULL; 1458 1459 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1460 KASSERT(ae == IEEE80211_MESH_AE_00 || 1461 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1462 if (ae == IEEE80211_MESH_AE_10) { 1463 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1464 return (0); /* process locally */ 1465 } 1466 1467 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1468 if (rt != NULL && 1469 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1470 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1471 /* 1472 * Forward on another mesh-path, according to 1473 * amendment as specified in 9.32.4.1 1474 */ 1475 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1476 mesh_forward(vap, m, 1477 (const struct ieee80211_meshcntl *)mc10); 1478 return (1); /* dont process locally */ 1479 } 1480 /* 1481 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1482 * addressed according to 13.11.3.2. 1483 */ 1484 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1485 "forward frame to DS, SA(%6D) DA(%6D)", 1486 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1487 } 1488 return (0); /* process locally */ 1489 } 1490 1491 /* 1492 * Try to forward the group addressed data on to other mesh STAs, and 1493 * also to the DS. 1494 * 1495 * > 0 means we have forwarded data and no need to process locally 1496 * == 0 means we want to process locally (and we may have forwarded data 1497 * < 0 means there was an error and data should be discarded 1498 */ 1499 static int 1500 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1501 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1502 { 1503 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1504 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1505 1506 /* This is called from the RX path - don't hold this lock */ 1507 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1508 1509 mesh_forward(vap, m, mc); 1510 1511 if(mc->mc_ttl > 0) { 1512 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1513 /* 1514 * Forward of MSDUs from the MBSS to DS group addressed 1515 * (according to 13.11.3.2) 1516 * This happens by delivering the packet, and a bridge 1517 * will sent it on another port member. 1518 */ 1519 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1520 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) { 1521 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1522 MC01(mc)->mc_addr4, "%s", 1523 "forward from MBSS to the DS"); 1524 } 1525 } 1526 } 1527 return (0); /* process locally */ 1528 #undef MC01 1529 } 1530 1531 static int 1532 mesh_input(struct ieee80211_node *ni, struct mbuf *m, 1533 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1534 { 1535 #define HAS_SEQ(type) ((type & 0x4) == 0) 1536 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1537 struct ieee80211vap *vap = ni->ni_vap; 1538 struct ieee80211com *ic = ni->ni_ic; 1539 struct ifnet *ifp = vap->iv_ifp; 1540 struct ieee80211_frame *wh; 1541 const struct ieee80211_meshcntl *mc; 1542 int hdrspace, meshdrlen, need_tap, error; 1543 uint8_t dir, type, subtype, ae; 1544 uint32_t seq; 1545 const uint8_t *addr; 1546 uint8_t qos[2]; 1547 1548 KASSERT(ni != NULL, ("null node")); 1549 ni->ni_inact = ni->ni_inact_reload; 1550 1551 need_tap = 1; /* mbuf need to be tapped. */ 1552 type = -1; /* undefined */ 1553 1554 /* This is called from the RX path - don't hold this lock */ 1555 IEEE80211_TX_UNLOCK_ASSERT(ic); 1556 1557 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1558 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1559 ni->ni_macaddr, NULL, 1560 "too short (1): len %u", m->m_pkthdr.len); 1561 vap->iv_stats.is_rx_tooshort++; 1562 goto out; 1563 } 1564 /* 1565 * Bit of a cheat here, we use a pointer for a 3-address 1566 * frame format but don't reference fields past outside 1567 * ieee80211_frame_min w/o first validating the data is 1568 * present. 1569 */ 1570 wh = mtod(m, struct ieee80211_frame *); 1571 1572 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1573 IEEE80211_FC0_VERSION_0) { 1574 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1575 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1576 vap->iv_stats.is_rx_badversion++; 1577 goto err; 1578 } 1579 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1580 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1581 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1582 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1583 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1584 ni->ni_noise = nf; 1585 if (HAS_SEQ(type)) { 1586 uint8_t tid = ieee80211_gettid(wh); 1587 1588 if (IEEE80211_QOS_HAS_SEQ(wh) && 1589 TID_TO_WME_AC(tid) >= WME_AC_VI) 1590 ic->ic_wme.wme_hipri_traffic++; 1591 if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs)) 1592 goto out; 1593 } 1594 } 1595 #ifdef IEEE80211_DEBUG 1596 /* 1597 * It's easier, but too expensive, to simulate different mesh 1598 * topologies by consulting the ACL policy very early, so do this 1599 * only under DEBUG. 1600 * 1601 * NB: this check is also done upon peering link initiation. 1602 */ 1603 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1604 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1605 wh, NULL, "%s", "disallowed by ACL"); 1606 vap->iv_stats.is_rx_acl++; 1607 goto out; 1608 } 1609 #endif 1610 switch (type) { 1611 case IEEE80211_FC0_TYPE_DATA: 1612 if (ni == vap->iv_bss) 1613 goto out; 1614 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1615 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1616 ni->ni_macaddr, NULL, 1617 "peer link not yet established (%d)", 1618 ni->ni_mlstate); 1619 vap->iv_stats.is_mesh_nolink++; 1620 goto out; 1621 } 1622 if (dir != IEEE80211_FC1_DIR_FROMDS && 1623 dir != IEEE80211_FC1_DIR_DSTODS) { 1624 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1625 wh, "data", "incorrect dir 0x%x", dir); 1626 vap->iv_stats.is_rx_wrongdir++; 1627 goto err; 1628 } 1629 1630 /* All Mesh data frames are QoS subtype */ 1631 if (!HAS_SEQ(type)) { 1632 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1633 wh, "data", "incorrect subtype 0x%x", subtype); 1634 vap->iv_stats.is_rx_badsubtype++; 1635 goto err; 1636 } 1637 1638 /* 1639 * Next up, any fragmentation. 1640 * XXX: we defrag before we even try to forward, 1641 * Mesh Control field is not present in sub-sequent 1642 * fragmented frames. This is in contrast to Draft 4.0. 1643 */ 1644 hdrspace = ieee80211_hdrspace(ic, wh); 1645 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1646 m = ieee80211_defrag(ni, m, hdrspace); 1647 if (m == NULL) { 1648 /* Fragment dropped or frame not complete yet */ 1649 goto out; 1650 } 1651 } 1652 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1653 1654 /* 1655 * Now we have a complete Mesh Data frame. 1656 */ 1657 1658 /* 1659 * Only fromDStoDS data frames use 4 address qos frames 1660 * as specified in amendment. Otherwise addr4 is located 1661 * in the Mesh Control field and a 3 address qos frame 1662 * is used. 1663 */ 1664 *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh); 1665 1666 /* 1667 * NB: The mesh STA sets the Mesh Control Present 1668 * subfield to 1 in the Mesh Data frame containing 1669 * an unfragmented MSDU, an A-MSDU, or the first 1670 * fragment of an MSDU. 1671 * After defrag it should always be present. 1672 */ 1673 if (!(qos[1] & IEEE80211_QOS_MC)) { 1674 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1675 ni->ni_macaddr, NULL, 1676 "%s", "Mesh control field not present"); 1677 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1678 goto err; 1679 } 1680 1681 /* pull up enough to get to the mesh control */ 1682 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1683 (m = m_pullup(m, hdrspace + 1684 sizeof(struct ieee80211_meshcntl))) == NULL) { 1685 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1686 ni->ni_macaddr, NULL, 1687 "data too short: expecting %u", hdrspace); 1688 vap->iv_stats.is_rx_tooshort++; 1689 goto out; /* XXX */ 1690 } 1691 /* 1692 * Now calculate the full extent of the headers. Note 1693 * mesh_decap will pull up anything we didn't get 1694 * above when it strips the 802.11 headers. 1695 */ 1696 mc = (const struct ieee80211_meshcntl *) 1697 (mtod(m, const uint8_t *) + hdrspace); 1698 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1699 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1700 ae * IEEE80211_ADDR_LEN; 1701 hdrspace += meshdrlen; 1702 1703 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1704 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1705 (m->m_len < hdrspace) && 1706 ((m = m_pullup(m, hdrspace)) == NULL)) { 1707 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1708 ni->ni_macaddr, NULL, 1709 "data too short: expecting %u", hdrspace); 1710 vap->iv_stats.is_rx_tooshort++; 1711 goto out; /* XXX */ 1712 } 1713 /* XXX: are we sure there is no reallocating after m_pullup? */ 1714 1715 seq = le32dec(mc->mc_seq); 1716 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1717 addr = wh->i_addr3; 1718 else if (ae == IEEE80211_MESH_AE_01) 1719 addr = MC01(mc)->mc_addr4; 1720 else 1721 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1722 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1723 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1724 addr, "data", "%s", "not to me"); 1725 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1726 goto out; 1727 } 1728 if (mesh_checkpseq(vap, addr, seq) != 0) { 1729 vap->iv_stats.is_rx_dup++; 1730 goto out; 1731 } 1732 1733 /* This code "routes" the frame to the right control path */ 1734 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1735 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1736 error = 1737 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1738 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1739 error = mesh_recv_group_data(vap, m, wh, mc); 1740 else 1741 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1742 wh, mc); 1743 } else 1744 error = mesh_recv_group_data(vap, m, wh, mc); 1745 if (error < 0) 1746 goto err; 1747 else if (error > 0) 1748 goto out; 1749 1750 if (ieee80211_radiotap_active_vap(vap)) 1751 ieee80211_radiotap_rx(vap, m); 1752 need_tap = 0; 1753 1754 /* 1755 * Finally, strip the 802.11 header. 1756 */ 1757 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1758 if (m == NULL) { 1759 /* XXX mask bit to check for both */ 1760 /* don't count Null data frames as errors */ 1761 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1762 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1763 goto out; 1764 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1765 ni->ni_macaddr, "data", "%s", "decap error"); 1766 vap->iv_stats.is_rx_decap++; 1767 IEEE80211_NODE_STAT(ni, rx_decap); 1768 goto err; 1769 } 1770 if (qos[0] & IEEE80211_QOS_AMSDU) { 1771 m = ieee80211_decap_amsdu(ni, m); 1772 if (m == NULL) 1773 return IEEE80211_FC0_TYPE_DATA; 1774 } 1775 ieee80211_deliver_data(vap, ni, m); 1776 return type; 1777 case IEEE80211_FC0_TYPE_MGT: 1778 vap->iv_stats.is_rx_mgmt++; 1779 IEEE80211_NODE_STAT(ni, rx_mgmt); 1780 if (dir != IEEE80211_FC1_DIR_NODS) { 1781 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1782 wh, "mgt", "incorrect dir 0x%x", dir); 1783 vap->iv_stats.is_rx_wrongdir++; 1784 goto err; 1785 } 1786 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1787 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1788 ni->ni_macaddr, "mgt", "too short: len %u", 1789 m->m_pkthdr.len); 1790 vap->iv_stats.is_rx_tooshort++; 1791 goto out; 1792 } 1793 #ifdef IEEE80211_DEBUG 1794 if ((ieee80211_msg_debug(vap) && 1795 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1796 ieee80211_msg_dumppkts(vap)) { 1797 if_printf(ifp, "received %s from %s rssi %d\n", 1798 ieee80211_mgt_subtype_name(subtype), 1799 ether_sprintf(wh->i_addr2), rssi); 1800 } 1801 #endif 1802 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1803 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1804 wh, NULL, "%s", "WEP set but not permitted"); 1805 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1806 goto out; 1807 } 1808 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 1809 goto out; 1810 case IEEE80211_FC0_TYPE_CTL: 1811 vap->iv_stats.is_rx_ctl++; 1812 IEEE80211_NODE_STAT(ni, rx_ctrl); 1813 goto out; 1814 default: 1815 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1816 wh, "bad", "frame type 0x%x", type); 1817 /* should not come here */ 1818 break; 1819 } 1820 err: 1821 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1822 out: 1823 if (m != NULL) { 1824 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1825 ieee80211_radiotap_rx(vap, m); 1826 m_freem(m); 1827 } 1828 return type; 1829 #undef HAS_SEQ 1830 #undef MC01 1831 } 1832 1833 static void 1834 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1835 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1836 { 1837 struct ieee80211vap *vap = ni->ni_vap; 1838 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1839 struct ieee80211com *ic = ni->ni_ic; 1840 struct ieee80211_channel *rxchan = ic->ic_curchan; 1841 struct ieee80211_frame *wh; 1842 struct ieee80211_mesh_route *rt; 1843 uint8_t *frm, *efrm; 1844 1845 wh = mtod(m0, struct ieee80211_frame *); 1846 frm = (uint8_t *)&wh[1]; 1847 efrm = mtod(m0, uint8_t *) + m0->m_len; 1848 switch (subtype) { 1849 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1850 case IEEE80211_FC0_SUBTYPE_BEACON: 1851 { 1852 struct ieee80211_scanparams scan; 1853 struct ieee80211_channel *c; 1854 /* 1855 * We process beacon/probe response 1856 * frames to discover neighbors. 1857 */ 1858 if (rxs != NULL) { 1859 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1860 if (c != NULL) 1861 rxchan = c; 1862 } 1863 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) 1864 return; 1865 /* 1866 * Count frame now that we know it's to be processed. 1867 */ 1868 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1869 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1870 IEEE80211_NODE_STAT(ni, rx_beacons); 1871 } else 1872 IEEE80211_NODE_STAT(ni, rx_proberesp); 1873 /* 1874 * If scanning, just pass information to the scan module. 1875 */ 1876 if (ic->ic_flags & IEEE80211_F_SCAN) { 1877 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1878 /* 1879 * Actively scanning a channel marked passive; 1880 * send a probe request now that we know there 1881 * is 802.11 traffic present. 1882 * 1883 * XXX check if the beacon we recv'd gives 1884 * us what we need and suppress the probe req 1885 */ 1886 ieee80211_probe_curchan(vap, 1); 1887 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1888 } 1889 ieee80211_add_scan(vap, rxchan, &scan, wh, 1890 subtype, rssi, nf); 1891 return; 1892 } 1893 1894 /* The rest of this code assumes we are running */ 1895 if (vap->iv_state != IEEE80211_S_RUN) 1896 return; 1897 /* 1898 * Ignore non-mesh STAs. 1899 */ 1900 if ((scan.capinfo & 1901 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1902 scan.meshid == NULL || scan.meshconf == NULL) { 1903 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1904 wh, "beacon", "%s", "not a mesh sta"); 1905 vap->iv_stats.is_mesh_wrongmesh++; 1906 return; 1907 } 1908 /* 1909 * Ignore STAs for other mesh networks. 1910 */ 1911 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1912 mesh_verify_meshconf(vap, scan.meshconf)) { 1913 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1914 wh, "beacon", "%s", "not for our mesh"); 1915 vap->iv_stats.is_mesh_wrongmesh++; 1916 return; 1917 } 1918 /* 1919 * Peer only based on the current ACL policy. 1920 */ 1921 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1922 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1923 wh, NULL, "%s", "disallowed by ACL"); 1924 vap->iv_stats.is_rx_acl++; 1925 return; 1926 } 1927 /* 1928 * Do neighbor discovery. 1929 */ 1930 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1931 /* 1932 * Create a new entry in the neighbor table. 1933 */ 1934 ni = ieee80211_add_neighbor(vap, wh, &scan); 1935 } 1936 /* 1937 * Automatically peer with discovered nodes if possible. 1938 */ 1939 if (ni != vap->iv_bss && 1940 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1941 switch (ni->ni_mlstate) { 1942 case IEEE80211_NODE_MESH_IDLE: 1943 { 1944 uint16_t args[1]; 1945 1946 /* Wait for backoff callout to reset counter */ 1947 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1948 return; 1949 1950 ni->ni_mlpid = mesh_generateid(vap); 1951 if (ni->ni_mlpid == 0) 1952 return; 1953 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1954 args[0] = ni->ni_mlpid; 1955 ieee80211_send_action(ni, 1956 IEEE80211_ACTION_CAT_SELF_PROT, 1957 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1958 ni->ni_mlrcnt = 0; 1959 mesh_peer_timeout_setup(ni); 1960 break; 1961 } 1962 case IEEE80211_NODE_MESH_ESTABLISHED: 1963 { 1964 /* 1965 * Valid beacon from a peer mesh STA 1966 * bump TA lifetime 1967 */ 1968 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1969 if(rt != NULL) { 1970 ieee80211_mesh_rt_update(rt, 1971 ticks_to_msecs( 1972 ms->ms_ppath->mpp_inact)); 1973 } 1974 break; 1975 } 1976 default: 1977 break; /* ignore */ 1978 } 1979 } 1980 break; 1981 } 1982 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1983 { 1984 uint8_t *ssid, *meshid, *rates, *xrates; 1985 1986 if (vap->iv_state != IEEE80211_S_RUN) { 1987 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1988 wh, NULL, "wrong state %s", 1989 ieee80211_state_name[vap->iv_state]); 1990 vap->iv_stats.is_rx_mgtdiscard++; 1991 return; 1992 } 1993 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1994 /* frame must be directed */ 1995 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1996 wh, NULL, "%s", "not unicast"); 1997 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1998 return; 1999 } 2000 /* 2001 * prreq frame format 2002 * [tlv] ssid 2003 * [tlv] supported rates 2004 * [tlv] extended supported rates 2005 * [tlv] mesh id 2006 */ 2007 ssid = meshid = rates = xrates = NULL; 2008 while (efrm - frm > 1) { 2009 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2010 switch (*frm) { 2011 case IEEE80211_ELEMID_SSID: 2012 ssid = frm; 2013 break; 2014 case IEEE80211_ELEMID_RATES: 2015 rates = frm; 2016 break; 2017 case IEEE80211_ELEMID_XRATES: 2018 xrates = frm; 2019 break; 2020 case IEEE80211_ELEMID_MESHID: 2021 meshid = frm; 2022 break; 2023 } 2024 frm += frm[1] + 2; 2025 } 2026 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2027 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2028 if (xrates != NULL) 2029 IEEE80211_VERIFY_ELEMENT(xrates, 2030 IEEE80211_RATE_MAXSIZE - rates[1], return); 2031 if (meshid != NULL) { 2032 IEEE80211_VERIFY_ELEMENT(meshid, 2033 IEEE80211_MESHID_LEN, return); 2034 /* NB: meshid, not ssid */ 2035 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2036 } 2037 2038 /* XXX find a better class or define it's own */ 2039 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2040 "%s", "recv probe req"); 2041 /* 2042 * Some legacy 11b clients cannot hack a complete 2043 * probe response frame. When the request includes 2044 * only a bare-bones rate set, communicate this to 2045 * the transmit side. 2046 */ 2047 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2048 break; 2049 } 2050 2051 case IEEE80211_FC0_SUBTYPE_ACTION: 2052 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2053 if (ni == vap->iv_bss) { 2054 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2055 wh, NULL, "%s", "unknown node"); 2056 vap->iv_stats.is_rx_mgtdiscard++; 2057 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2058 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2059 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2060 wh, NULL, "%s", "not for us"); 2061 vap->iv_stats.is_rx_mgtdiscard++; 2062 } else if (vap->iv_state != IEEE80211_S_RUN) { 2063 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2064 wh, NULL, "wrong state %s", 2065 ieee80211_state_name[vap->iv_state]); 2066 vap->iv_stats.is_rx_mgtdiscard++; 2067 } else { 2068 if (ieee80211_parse_action(ni, m0) == 0) 2069 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2070 } 2071 break; 2072 2073 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2074 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2075 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2076 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2077 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 2078 case IEEE80211_FC0_SUBTYPE_ATIM: 2079 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2080 case IEEE80211_FC0_SUBTYPE_AUTH: 2081 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2082 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2083 wh, NULL, "%s", "not handled"); 2084 vap->iv_stats.is_rx_mgtdiscard++; 2085 break; 2086 2087 default: 2088 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2089 wh, "mgt", "subtype 0x%x not handled", subtype); 2090 vap->iv_stats.is_rx_badsubtype++; 2091 break; 2092 } 2093 } 2094 2095 static void 2096 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2097 { 2098 2099 switch (subtype) { 2100 case IEEE80211_FC0_SUBTYPE_BAR: 2101 ieee80211_recv_bar(ni, m); 2102 break; 2103 } 2104 } 2105 2106 /* 2107 * Parse meshpeering action ie's for MPM frames 2108 */ 2109 static const struct ieee80211_meshpeer_ie * 2110 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2111 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2112 const uint8_t *frm, const uint8_t *efrm, 2113 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2114 { 2115 struct ieee80211vap *vap = ni->ni_vap; 2116 const struct ieee80211_meshpeer_ie *mpie; 2117 uint16_t args[3]; 2118 const uint8_t *meshid, *meshconf; 2119 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2120 2121 meshid = meshconf = NULL; 2122 while (efrm - frm > 1) { 2123 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2124 switch (*frm) { 2125 case IEEE80211_ELEMID_MESHID: 2126 meshid = frm; 2127 break; 2128 case IEEE80211_ELEMID_MESHCONF: 2129 meshconf = frm; 2130 break; 2131 case IEEE80211_ELEMID_MESHPEER: 2132 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2133 memset(mp, 0, sizeof(*mp)); 2134 mp->peer_len = mpie->peer_len; 2135 mp->peer_proto = le16dec(&mpie->peer_proto); 2136 mp->peer_llinkid = le16dec(&mpie->peer_llinkid); 2137 switch (subtype) { 2138 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2139 mp->peer_linkid = 2140 le16dec(&mpie->peer_linkid); 2141 break; 2142 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2143 /* NB: peer link ID is optional */ 2144 if (mpie->peer_len == 2145 (IEEE80211_MPM_BASE_SZ + 2)) { 2146 mp->peer_linkid = 0; 2147 mp->peer_rcode = 2148 le16dec(&mpie->peer_linkid); 2149 } else { 2150 mp->peer_linkid = 2151 le16dec(&mpie->peer_linkid); 2152 mp->peer_rcode = 2153 le16dec(&mpie->peer_rcode); 2154 } 2155 break; 2156 } 2157 break; 2158 } 2159 frm += frm[1] + 2; 2160 } 2161 2162 /* 2163 * Verify the contents of the frame. 2164 * If it fails validation, close the peer link. 2165 */ 2166 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2167 sendclose = 1; 2168 IEEE80211_DISCARD(vap, 2169 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2170 wh, NULL, "%s", "MPM validation failed"); 2171 } 2172 2173 /* If meshid is not the same reject any frames type. */ 2174 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2175 sendclose = 1; 2176 IEEE80211_DISCARD(vap, 2177 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2178 wh, NULL, "%s", "not for our mesh"); 2179 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2180 /* 2181 * Standard not clear about this, if we dont ignore 2182 * there will be an endless loop between nodes sending 2183 * CLOSE frames between each other with wrong meshid. 2184 * Discard and timers will bring FSM to IDLE state. 2185 */ 2186 return NULL; 2187 } 2188 } 2189 2190 /* 2191 * Close frames are accepted if meshid is the same. 2192 * Verify the other two types. 2193 */ 2194 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2195 mesh_verify_meshconf(vap, meshconf)) { 2196 sendclose = 1; 2197 IEEE80211_DISCARD(vap, 2198 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2199 wh, NULL, "%s", "configuration missmatch"); 2200 } 2201 2202 if (sendclose) { 2203 vap->iv_stats.is_rx_mgtdiscard++; 2204 switch (ni->ni_mlstate) { 2205 case IEEE80211_NODE_MESH_IDLE: 2206 case IEEE80211_NODE_MESH_ESTABLISHED: 2207 case IEEE80211_NODE_MESH_HOLDING: 2208 /* ignore */ 2209 break; 2210 case IEEE80211_NODE_MESH_OPENSNT: 2211 case IEEE80211_NODE_MESH_OPENRCV: 2212 case IEEE80211_NODE_MESH_CONFIRMRCV: 2213 args[0] = ni->ni_mlpid; 2214 args[1] = ni->ni_mllid; 2215 /* Reason codes for rejection */ 2216 switch (subtype) { 2217 case IEEE80211_ACTION_MESHPEERING_OPEN: 2218 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2219 break; 2220 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2221 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2222 break; 2223 } 2224 ieee80211_send_action(ni, 2225 IEEE80211_ACTION_CAT_SELF_PROT, 2226 IEEE80211_ACTION_MESHPEERING_CLOSE, 2227 args); 2228 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2229 mesh_peer_timeout_setup(ni); 2230 break; 2231 } 2232 return NULL; 2233 } 2234 2235 return (const struct ieee80211_meshpeer_ie *) mp; 2236 } 2237 2238 static int 2239 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2240 const struct ieee80211_frame *wh, 2241 const uint8_t *frm, const uint8_t *efrm) 2242 { 2243 struct ieee80211vap *vap = ni->ni_vap; 2244 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2245 struct ieee80211_meshpeer_ie ie; 2246 const struct ieee80211_meshpeer_ie *meshpeer; 2247 uint16_t args[3]; 2248 2249 /* +2+2 for action + code + capabilites */ 2250 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2251 IEEE80211_ACTION_MESHPEERING_OPEN); 2252 if (meshpeer == NULL) { 2253 return 0; 2254 } 2255 2256 /* XXX move up */ 2257 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2258 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2259 2260 switch (ni->ni_mlstate) { 2261 case IEEE80211_NODE_MESH_IDLE: 2262 /* Reject open request if reached our maximum neighbor count */ 2263 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2264 args[0] = meshpeer->peer_llinkid; 2265 args[1] = 0; 2266 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2267 ieee80211_send_action(ni, 2268 IEEE80211_ACTION_CAT_SELF_PROT, 2269 IEEE80211_ACTION_MESHPEERING_CLOSE, 2270 args); 2271 /* stay in IDLE state */ 2272 return (0); 2273 } 2274 /* Open frame accepted */ 2275 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2276 ni->ni_mllid = meshpeer->peer_llinkid; 2277 ni->ni_mlpid = mesh_generateid(vap); 2278 if (ni->ni_mlpid == 0) 2279 return 0; /* XXX */ 2280 args[0] = ni->ni_mlpid; 2281 /* Announce we're open too... */ 2282 ieee80211_send_action(ni, 2283 IEEE80211_ACTION_CAT_SELF_PROT, 2284 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2285 /* ...and confirm the link. */ 2286 args[0] = ni->ni_mlpid; 2287 args[1] = ni->ni_mllid; 2288 ieee80211_send_action(ni, 2289 IEEE80211_ACTION_CAT_SELF_PROT, 2290 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2291 args); 2292 mesh_peer_timeout_setup(ni); 2293 break; 2294 case IEEE80211_NODE_MESH_OPENRCV: 2295 /* Wrong Link ID */ 2296 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2297 args[0] = ni->ni_mllid; 2298 args[1] = ni->ni_mlpid; 2299 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2300 ieee80211_send_action(ni, 2301 IEEE80211_ACTION_CAT_SELF_PROT, 2302 IEEE80211_ACTION_MESHPEERING_CLOSE, 2303 args); 2304 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2305 mesh_peer_timeout_setup(ni); 2306 break; 2307 } 2308 /* Duplicate open, confirm again. */ 2309 args[0] = ni->ni_mlpid; 2310 args[1] = ni->ni_mllid; 2311 ieee80211_send_action(ni, 2312 IEEE80211_ACTION_CAT_SELF_PROT, 2313 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2314 args); 2315 break; 2316 case IEEE80211_NODE_MESH_OPENSNT: 2317 ni->ni_mllid = meshpeer->peer_llinkid; 2318 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2319 args[0] = ni->ni_mlpid; 2320 args[1] = ni->ni_mllid; 2321 ieee80211_send_action(ni, 2322 IEEE80211_ACTION_CAT_SELF_PROT, 2323 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2324 args); 2325 /* NB: don't setup/clear any timeout */ 2326 break; 2327 case IEEE80211_NODE_MESH_CONFIRMRCV: 2328 if (ni->ni_mlpid != meshpeer->peer_linkid || 2329 ni->ni_mllid != meshpeer->peer_llinkid) { 2330 args[0] = ni->ni_mlpid; 2331 args[1] = ni->ni_mllid; 2332 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2333 ieee80211_send_action(ni, 2334 IEEE80211_ACTION_CAT_SELF_PROT, 2335 IEEE80211_ACTION_MESHPEERING_CLOSE, 2336 args); 2337 mesh_linkchange(ni, 2338 IEEE80211_NODE_MESH_HOLDING); 2339 mesh_peer_timeout_setup(ni); 2340 break; 2341 } 2342 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2343 ni->ni_mllid = meshpeer->peer_llinkid; 2344 args[0] = ni->ni_mlpid; 2345 args[1] = ni->ni_mllid; 2346 ieee80211_send_action(ni, 2347 IEEE80211_ACTION_CAT_SELF_PROT, 2348 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2349 args); 2350 mesh_peer_timeout_stop(ni); 2351 break; 2352 case IEEE80211_NODE_MESH_ESTABLISHED: 2353 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2354 args[0] = ni->ni_mllid; 2355 args[1] = ni->ni_mlpid; 2356 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2357 ieee80211_send_action(ni, 2358 IEEE80211_ACTION_CAT_SELF_PROT, 2359 IEEE80211_ACTION_MESHPEERING_CLOSE, 2360 args); 2361 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2362 mesh_peer_timeout_setup(ni); 2363 break; 2364 } 2365 args[0] = ni->ni_mlpid; 2366 args[1] = ni->ni_mllid; 2367 ieee80211_send_action(ni, 2368 IEEE80211_ACTION_CAT_SELF_PROT, 2369 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2370 args); 2371 break; 2372 case IEEE80211_NODE_MESH_HOLDING: 2373 args[0] = ni->ni_mlpid; 2374 args[1] = meshpeer->peer_llinkid; 2375 /* Standard not clear about what the reaason code should be */ 2376 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2377 ieee80211_send_action(ni, 2378 IEEE80211_ACTION_CAT_SELF_PROT, 2379 IEEE80211_ACTION_MESHPEERING_CLOSE, 2380 args); 2381 break; 2382 } 2383 return 0; 2384 } 2385 2386 static int 2387 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2388 const struct ieee80211_frame *wh, 2389 const uint8_t *frm, const uint8_t *efrm) 2390 { 2391 struct ieee80211vap *vap = ni->ni_vap; 2392 struct ieee80211_meshpeer_ie ie; 2393 const struct ieee80211_meshpeer_ie *meshpeer; 2394 uint16_t args[3]; 2395 2396 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2397 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2398 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2399 if (meshpeer == NULL) { 2400 return 0; 2401 } 2402 2403 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2404 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2405 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2406 2407 switch (ni->ni_mlstate) { 2408 case IEEE80211_NODE_MESH_OPENRCV: 2409 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2410 mesh_peer_timeout_stop(ni); 2411 break; 2412 case IEEE80211_NODE_MESH_OPENSNT: 2413 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2414 mesh_peer_timeout_setup(ni); 2415 break; 2416 case IEEE80211_NODE_MESH_HOLDING: 2417 args[0] = ni->ni_mlpid; 2418 args[1] = meshpeer->peer_llinkid; 2419 /* Standard not clear about what the reaason code should be */ 2420 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2421 ieee80211_send_action(ni, 2422 IEEE80211_ACTION_CAT_SELF_PROT, 2423 IEEE80211_ACTION_MESHPEERING_CLOSE, 2424 args); 2425 break; 2426 case IEEE80211_NODE_MESH_CONFIRMRCV: 2427 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2428 args[0] = ni->ni_mlpid; 2429 args[1] = ni->ni_mllid; 2430 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2431 ieee80211_send_action(ni, 2432 IEEE80211_ACTION_CAT_SELF_PROT, 2433 IEEE80211_ACTION_MESHPEERING_CLOSE, 2434 args); 2435 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2436 mesh_peer_timeout_setup(ni); 2437 } 2438 break; 2439 default: 2440 IEEE80211_DISCARD(vap, 2441 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2442 wh, NULL, "received confirm in invalid state %d", 2443 ni->ni_mlstate); 2444 vap->iv_stats.is_rx_mgtdiscard++; 2445 break; 2446 } 2447 return 0; 2448 } 2449 2450 static int 2451 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2452 const struct ieee80211_frame *wh, 2453 const uint8_t *frm, const uint8_t *efrm) 2454 { 2455 struct ieee80211_meshpeer_ie ie; 2456 const struct ieee80211_meshpeer_ie *meshpeer; 2457 uint16_t args[3]; 2458 2459 /* +2 for action + code */ 2460 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2461 IEEE80211_ACTION_MESHPEERING_CLOSE); 2462 if (meshpeer == NULL) { 2463 return 0; 2464 } 2465 2466 /* 2467 * XXX: check reason code, for example we could receive 2468 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2469 * to peer again. 2470 */ 2471 2472 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2473 ni, "%s", "recv PEER CLOSE"); 2474 2475 switch (ni->ni_mlstate) { 2476 case IEEE80211_NODE_MESH_IDLE: 2477 /* ignore */ 2478 break; 2479 case IEEE80211_NODE_MESH_OPENRCV: 2480 case IEEE80211_NODE_MESH_OPENSNT: 2481 case IEEE80211_NODE_MESH_CONFIRMRCV: 2482 case IEEE80211_NODE_MESH_ESTABLISHED: 2483 args[0] = ni->ni_mlpid; 2484 args[1] = ni->ni_mllid; 2485 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2486 ieee80211_send_action(ni, 2487 IEEE80211_ACTION_CAT_SELF_PROT, 2488 IEEE80211_ACTION_MESHPEERING_CLOSE, 2489 args); 2490 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2491 mesh_peer_timeout_setup(ni); 2492 break; 2493 case IEEE80211_NODE_MESH_HOLDING: 2494 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2495 mesh_peer_timeout_stop(ni); 2496 break; 2497 } 2498 return 0; 2499 } 2500 2501 /* 2502 * Link Metric handling. 2503 */ 2504 static int 2505 mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2506 const struct ieee80211_frame *wh, 2507 const uint8_t *frm, const uint8_t *efrm) 2508 { 2509 const struct ieee80211_meshlmetric_ie *ie = 2510 (const struct ieee80211_meshlmetric_ie *) 2511 (frm+2); /* action + code */ 2512 struct ieee80211_meshlmetric_ie lm_rep; 2513 2514 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2515 lm_rep.lm_flags = 0; 2516 lm_rep.lm_metric = mesh_airtime_calc(ni); 2517 ieee80211_send_action(ni, 2518 IEEE80211_ACTION_CAT_MESH, 2519 IEEE80211_ACTION_MESH_LMETRIC, 2520 &lm_rep); 2521 } 2522 /* XXX: else do nothing for now */ 2523 return 0; 2524 } 2525 2526 /* 2527 * Parse meshgate action ie's for GANN frames. 2528 * Returns -1 if parsing fails, otherwise 0. 2529 */ 2530 static int 2531 mesh_parse_meshgate_action(struct ieee80211_node *ni, 2532 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2533 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2534 { 2535 struct ieee80211vap *vap = ni->ni_vap; 2536 const struct ieee80211_meshgann_ie *gannie; 2537 2538 while (efrm - frm > 1) { 2539 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2540 switch (*frm) { 2541 case IEEE80211_ELEMID_MESHGANN: 2542 gannie = (const struct ieee80211_meshgann_ie *) frm; 2543 memset(ie, 0, sizeof(*ie)); 2544 ie->gann_ie = gannie->gann_ie; 2545 ie->gann_len = gannie->gann_len; 2546 ie->gann_flags = gannie->gann_flags; 2547 ie->gann_hopcount = gannie->gann_hopcount; 2548 ie->gann_ttl = gannie->gann_ttl; 2549 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2550 ie->gann_seq = le32dec(&gannie->gann_seq); 2551 ie->gann_interval = le16dec(&gannie->gann_interval); 2552 break; 2553 } 2554 frm += frm[1] + 2; 2555 } 2556 2557 return 0; 2558 } 2559 2560 /* 2561 * Mesh Gate Announcement handling. 2562 */ 2563 static int 2564 mesh_recv_action_meshgate(struct ieee80211_node *ni, 2565 const struct ieee80211_frame *wh, 2566 const uint8_t *frm, const uint8_t *efrm) 2567 { 2568 struct ieee80211vap *vap = ni->ni_vap; 2569 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2570 struct ieee80211_mesh_gate_route *gr, *next; 2571 struct ieee80211_mesh_route *rt_gate; 2572 struct ieee80211_meshgann_ie pgann; 2573 struct ieee80211_meshgann_ie ie; 2574 int found = 0; 2575 2576 /* +2 for action + code */ 2577 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2578 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2579 ni->ni_macaddr, NULL, "%s", 2580 "GANN parsing failed"); 2581 vap->iv_stats.is_rx_mgtdiscard++; 2582 return (0); 2583 } 2584 2585 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2586 return 0; 2587 2588 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2589 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2590 ie.gann_seq); 2591 2592 if (ms == NULL) 2593 return (0); 2594 MESH_RT_LOCK(ms); 2595 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2596 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2597 continue; 2598 if (ie.gann_seq <= gr->gr_lastseq) { 2599 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2600 ni->ni_macaddr, NULL, 2601 "GANN old seqno %u <= %u", 2602 ie.gann_seq, gr->gr_lastseq); 2603 MESH_RT_UNLOCK(ms); 2604 return (0); 2605 } 2606 /* corresponding mesh gate found & GANN accepted */ 2607 found = 1; 2608 break; 2609 2610 } 2611 if (found == 0) { 2612 /* this GANN is from a new mesh Gate add it to known table. */ 2613 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2614 "stored new GANN information, seq %u.", ie.gann_seq); 2615 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2616 M_80211_MESH_GT_RT, 2617 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2618 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2619 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2620 } 2621 gr->gr_lastseq = ie.gann_seq; 2622 2623 /* check if we have a path to this gate */ 2624 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2625 if (rt_gate != NULL && 2626 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2627 gr->gr_route = rt_gate; 2628 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2629 } 2630 2631 MESH_RT_UNLOCK(ms); 2632 2633 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2634 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2635 return 0; 2636 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2637 pgann.gann_hopcount = ie.gann_hopcount + 1; 2638 pgann.gann_ttl = ie.gann_ttl - 1; 2639 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2640 pgann.gann_seq = ie.gann_seq; 2641 pgann.gann_interval = ie.gann_interval; 2642 2643 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2644 "%s", "propagate GANN"); 2645 2646 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2647 IEEE80211_ACTION_MESH_GANN, &pgann); 2648 2649 return 0; 2650 } 2651 2652 static int 2653 mesh_send_action(struct ieee80211_node *ni, 2654 const uint8_t sa[IEEE80211_ADDR_LEN], 2655 const uint8_t da[IEEE80211_ADDR_LEN], 2656 struct mbuf *m) 2657 { 2658 struct ieee80211vap *vap = ni->ni_vap; 2659 struct ieee80211com *ic = ni->ni_ic; 2660 struct ieee80211_bpf_params params; 2661 int ret; 2662 2663 KASSERT(ni != NULL, ("null node")); 2664 2665 if (vap->iv_state == IEEE80211_S_CAC) { 2666 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2667 "block %s frame in CAC state", "Mesh action"); 2668 vap->iv_stats.is_tx_badstate++; 2669 ieee80211_free_node(ni); 2670 m_freem(m); 2671 return EIO; /* XXX */ 2672 } 2673 2674 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2675 if (m == NULL) { 2676 ieee80211_free_node(ni); 2677 return ENOMEM; 2678 } 2679 2680 IEEE80211_TX_LOCK(ic); 2681 ieee80211_send_setup(ni, m, 2682 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2683 IEEE80211_NONQOS_TID, sa, da, sa); 2684 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2685 2686 memset(¶ms, 0, sizeof(params)); 2687 params.ibp_pri = WME_AC_VO; 2688 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2689 if (IEEE80211_IS_MULTICAST(da)) 2690 params.ibp_try0 = 1; 2691 else 2692 params.ibp_try0 = ni->ni_txparms->maxretry; 2693 params.ibp_power = ni->ni_txpower; 2694 2695 IEEE80211_NODE_STAT(ni, tx_mgmt); 2696 2697 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2698 IEEE80211_TX_UNLOCK(ic); 2699 return (ret); 2700 } 2701 2702 #define ADDSHORT(frm, v) do { \ 2703 frm[0] = (v) & 0xff; \ 2704 frm[1] = (v) >> 8; \ 2705 frm += 2; \ 2706 } while (0) 2707 #define ADDWORD(frm, v) do { \ 2708 frm[0] = (v) & 0xff; \ 2709 frm[1] = ((v) >> 8) & 0xff; \ 2710 frm[2] = ((v) >> 16) & 0xff; \ 2711 frm[3] = ((v) >> 24) & 0xff; \ 2712 frm += 4; \ 2713 } while (0) 2714 2715 static int 2716 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2717 int category, int action, void *args0) 2718 { 2719 struct ieee80211vap *vap = ni->ni_vap; 2720 struct ieee80211com *ic = ni->ni_ic; 2721 uint16_t *args = args0; 2722 const struct ieee80211_rateset *rs; 2723 struct mbuf *m; 2724 uint8_t *frm; 2725 2726 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2727 "send PEER OPEN action: localid 0x%x", args[0]); 2728 2729 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2730 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2731 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2732 ieee80211_ref_node(ni); 2733 2734 m = ieee80211_getmgtframe(&frm, 2735 ic->ic_headroom + sizeof(struct ieee80211_frame), 2736 sizeof(uint16_t) /* action+category */ 2737 + sizeof(uint16_t) /* capabilites */ 2738 + 2 + IEEE80211_RATE_SIZE 2739 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2740 + 2 + IEEE80211_MESHID_LEN 2741 + sizeof(struct ieee80211_meshconf_ie) 2742 + sizeof(struct ieee80211_meshpeer_ie) 2743 ); 2744 if (m != NULL) { 2745 /* 2746 * mesh peer open action frame format: 2747 * [1] category 2748 * [1] action 2749 * [2] capabilities 2750 * [tlv] rates 2751 * [tlv] xrates 2752 * [tlv] mesh id 2753 * [tlv] mesh conf 2754 * [tlv] mesh peer link mgmt 2755 */ 2756 *frm++ = category; 2757 *frm++ = action; 2758 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2759 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2760 frm = ieee80211_add_rates(frm, rs); 2761 frm = ieee80211_add_xrates(frm, rs); 2762 frm = ieee80211_add_meshid(frm, vap); 2763 frm = ieee80211_add_meshconf(frm, vap); 2764 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2765 args[0], 0, 0); 2766 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2767 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2768 } else { 2769 vap->iv_stats.is_tx_nobuf++; 2770 ieee80211_free_node(ni); 2771 return ENOMEM; 2772 } 2773 } 2774 2775 static int 2776 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2777 int category, int action, void *args0) 2778 { 2779 struct ieee80211vap *vap = ni->ni_vap; 2780 struct ieee80211com *ic = ni->ni_ic; 2781 uint16_t *args = args0; 2782 const struct ieee80211_rateset *rs; 2783 struct mbuf *m; 2784 uint8_t *frm; 2785 2786 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2787 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2788 args[0], args[1]); 2789 2790 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2791 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2792 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2793 ieee80211_ref_node(ni); 2794 2795 m = ieee80211_getmgtframe(&frm, 2796 ic->ic_headroom + sizeof(struct ieee80211_frame), 2797 sizeof(uint16_t) /* action+category */ 2798 + sizeof(uint16_t) /* capabilites */ 2799 + sizeof(uint16_t) /* status code */ 2800 + sizeof(uint16_t) /* AID */ 2801 + 2 + IEEE80211_RATE_SIZE 2802 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2803 + 2 + IEEE80211_MESHID_LEN 2804 + sizeof(struct ieee80211_meshconf_ie) 2805 + sizeof(struct ieee80211_meshpeer_ie) 2806 ); 2807 if (m != NULL) { 2808 /* 2809 * mesh peer confirm action frame format: 2810 * [1] category 2811 * [1] action 2812 * [2] capabilities 2813 * [2] status code 2814 * [2] association id (peer ID) 2815 * [tlv] rates 2816 * [tlv] xrates 2817 * [tlv] mesh id 2818 * [tlv] mesh conf 2819 * [tlv] mesh peer link mgmt 2820 */ 2821 *frm++ = category; 2822 *frm++ = action; 2823 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2824 ADDSHORT(frm, 0); /* status code */ 2825 ADDSHORT(frm, args[1]); /* AID */ 2826 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2827 frm = ieee80211_add_rates(frm, rs); 2828 frm = ieee80211_add_xrates(frm, rs); 2829 frm = ieee80211_add_meshid(frm, vap); 2830 frm = ieee80211_add_meshconf(frm, vap); 2831 frm = ieee80211_add_meshpeer(frm, 2832 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2833 args[0], args[1], 0); 2834 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2835 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2836 } else { 2837 vap->iv_stats.is_tx_nobuf++; 2838 ieee80211_free_node(ni); 2839 return ENOMEM; 2840 } 2841 } 2842 2843 static int 2844 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2845 int category, int action, void *args0) 2846 { 2847 struct ieee80211vap *vap = ni->ni_vap; 2848 struct ieee80211com *ic = ni->ni_ic; 2849 uint16_t *args = args0; 2850 struct mbuf *m; 2851 uint8_t *frm; 2852 2853 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2854 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)", 2855 args[0], args[1], args[2], ieee80211_reason_to_string(args[2])); 2856 2857 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2858 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2859 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2860 ieee80211_ref_node(ni); 2861 2862 m = ieee80211_getmgtframe(&frm, 2863 ic->ic_headroom + sizeof(struct ieee80211_frame), 2864 sizeof(uint16_t) /* action+category */ 2865 + sizeof(uint16_t) /* reason code */ 2866 + 2 + IEEE80211_MESHID_LEN 2867 + sizeof(struct ieee80211_meshpeer_ie) 2868 ); 2869 if (m != NULL) { 2870 /* 2871 * mesh peer close action frame format: 2872 * [1] category 2873 * [1] action 2874 * [tlv] mesh id 2875 * [tlv] mesh peer link mgmt 2876 */ 2877 *frm++ = category; 2878 *frm++ = action; 2879 frm = ieee80211_add_meshid(frm, vap); 2880 frm = ieee80211_add_meshpeer(frm, 2881 IEEE80211_ACTION_MESHPEERING_CLOSE, 2882 args[0], args[1], args[2]); 2883 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2884 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2885 } else { 2886 vap->iv_stats.is_tx_nobuf++; 2887 ieee80211_free_node(ni); 2888 return ENOMEM; 2889 } 2890 } 2891 2892 static int 2893 mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2894 int category, int action, void *arg0) 2895 { 2896 struct ieee80211vap *vap = ni->ni_vap; 2897 struct ieee80211com *ic = ni->ni_ic; 2898 struct ieee80211_meshlmetric_ie *ie = arg0; 2899 struct mbuf *m; 2900 uint8_t *frm; 2901 2902 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2903 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2904 ni, "%s", "send LINK METRIC REQUEST action"); 2905 } else { 2906 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2907 ni, "send LINK METRIC REPLY action: metric 0x%x", 2908 ie->lm_metric); 2909 } 2910 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2911 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2912 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2913 ieee80211_ref_node(ni); 2914 2915 m = ieee80211_getmgtframe(&frm, 2916 ic->ic_headroom + sizeof(struct ieee80211_frame), 2917 sizeof(uint16_t) + /* action+category */ 2918 sizeof(struct ieee80211_meshlmetric_ie) 2919 ); 2920 if (m != NULL) { 2921 /* 2922 * mesh link metric 2923 * [1] category 2924 * [1] action 2925 * [tlv] mesh link metric 2926 */ 2927 *frm++ = category; 2928 *frm++ = action; 2929 frm = ieee80211_add_meshlmetric(frm, 2930 ie->lm_flags, ie->lm_metric); 2931 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2932 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2933 } else { 2934 vap->iv_stats.is_tx_nobuf++; 2935 ieee80211_free_node(ni); 2936 return ENOMEM; 2937 } 2938 } 2939 2940 static int 2941 mesh_send_action_meshgate(struct ieee80211_node *ni, 2942 int category, int action, void *arg0) 2943 { 2944 struct ieee80211vap *vap = ni->ni_vap; 2945 struct ieee80211com *ic = ni->ni_ic; 2946 struct ieee80211_meshgann_ie *ie = arg0; 2947 struct mbuf *m; 2948 uint8_t *frm; 2949 2950 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2951 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2952 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2953 ieee80211_ref_node(ni); 2954 2955 m = ieee80211_getmgtframe(&frm, 2956 ic->ic_headroom + sizeof(struct ieee80211_frame), 2957 sizeof(uint16_t) + /* action+category */ 2958 IEEE80211_MESHGANN_BASE_SZ 2959 ); 2960 if (m != NULL) { 2961 /* 2962 * mesh link metric 2963 * [1] category 2964 * [1] action 2965 * [tlv] mesh gate annoucement 2966 */ 2967 *frm++ = category; 2968 *frm++ = action; 2969 frm = ieee80211_add_meshgate(frm, ie); 2970 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2971 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 2972 } else { 2973 vap->iv_stats.is_tx_nobuf++; 2974 ieee80211_free_node(ni); 2975 return ENOMEM; 2976 } 2977 } 2978 2979 static void 2980 mesh_peer_timeout_setup(struct ieee80211_node *ni) 2981 { 2982 switch (ni->ni_mlstate) { 2983 case IEEE80211_NODE_MESH_HOLDING: 2984 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 2985 break; 2986 case IEEE80211_NODE_MESH_CONFIRMRCV: 2987 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 2988 break; 2989 case IEEE80211_NODE_MESH_IDLE: 2990 ni->ni_mltval = 0; 2991 break; 2992 default: 2993 ni->ni_mltval = ieee80211_mesh_retrytimeout; 2994 break; 2995 } 2996 if (ni->ni_mltval) 2997 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2998 mesh_peer_timeout_cb, ni); 2999 } 3000 3001 /* 3002 * Same as above but backoffs timer statisically 50%. 3003 */ 3004 static void 3005 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3006 { 3007 uint32_t r; 3008 3009 r = arc4random(); 3010 ni->ni_mltval += r % ni->ni_mltval; 3011 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3012 ni); 3013 } 3014 3015 static __inline void 3016 mesh_peer_timeout_stop(struct ieee80211_node *ni) 3017 { 3018 callout_drain(&ni->ni_mltimer); 3019 } 3020 3021 static void 3022 mesh_peer_backoff_cb(void *arg) 3023 { 3024 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3025 3026 /* After backoff timeout, try to peer automatically again. */ 3027 ni->ni_mlhcnt = 0; 3028 } 3029 3030 /* 3031 * Mesh Peer Link Management FSM timeout handling. 3032 */ 3033 static void 3034 mesh_peer_timeout_cb(void *arg) 3035 { 3036 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3037 uint16_t args[3]; 3038 3039 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3040 ni, "mesh link timeout, state %d, retry counter %d", 3041 ni->ni_mlstate, ni->ni_mlrcnt); 3042 3043 switch (ni->ni_mlstate) { 3044 case IEEE80211_NODE_MESH_IDLE: 3045 case IEEE80211_NODE_MESH_ESTABLISHED: 3046 break; 3047 case IEEE80211_NODE_MESH_OPENSNT: 3048 case IEEE80211_NODE_MESH_OPENRCV: 3049 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3050 args[0] = ni->ni_mlpid; 3051 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3052 ieee80211_send_action(ni, 3053 IEEE80211_ACTION_CAT_SELF_PROT, 3054 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3055 ni->ni_mlrcnt = 0; 3056 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3057 mesh_peer_timeout_setup(ni); 3058 } else { 3059 args[0] = ni->ni_mlpid; 3060 ieee80211_send_action(ni, 3061 IEEE80211_ACTION_CAT_SELF_PROT, 3062 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3063 ni->ni_mlrcnt++; 3064 mesh_peer_timeout_backoff(ni); 3065 } 3066 break; 3067 case IEEE80211_NODE_MESH_CONFIRMRCV: 3068 args[0] = ni->ni_mlpid; 3069 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3070 ieee80211_send_action(ni, 3071 IEEE80211_ACTION_CAT_SELF_PROT, 3072 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3073 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3074 mesh_peer_timeout_setup(ni); 3075 break; 3076 case IEEE80211_NODE_MESH_HOLDING: 3077 ni->ni_mlhcnt++; 3078 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3079 callout_reset(&ni->ni_mlhtimer, 3080 ieee80211_mesh_backofftimeout, 3081 mesh_peer_backoff_cb, ni); 3082 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3083 break; 3084 } 3085 } 3086 3087 static int 3088 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3089 { 3090 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3091 3092 if (ie == NULL || ie[1] != ms->ms_idlen) 3093 return 1; 3094 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3095 } 3096 3097 /* 3098 * Check if we are using the same algorithms for this mesh. 3099 */ 3100 static int 3101 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3102 { 3103 const struct ieee80211_meshconf_ie *meshconf = 3104 (const struct ieee80211_meshconf_ie *) ie; 3105 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3106 3107 if (meshconf == NULL) 3108 return 1; 3109 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3110 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3111 "unknown path selection algorithm: 0x%x\n", 3112 meshconf->conf_pselid); 3113 return 1; 3114 } 3115 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3116 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3117 "unknown path metric algorithm: 0x%x\n", 3118 meshconf->conf_pmetid); 3119 return 1; 3120 } 3121 if (meshconf->conf_ccid != 0) { 3122 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3123 "unknown congestion control algorithm: 0x%x\n", 3124 meshconf->conf_ccid); 3125 return 1; 3126 } 3127 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3128 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3129 "unknown sync algorithm: 0x%x\n", 3130 meshconf->conf_syncid); 3131 return 1; 3132 } 3133 if (meshconf->conf_authid != 0) { 3134 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3135 "unknown auth auth algorithm: 0x%x\n", 3136 meshconf->conf_pselid); 3137 return 1; 3138 } 3139 /* Not accepting peers */ 3140 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3141 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3142 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3143 return 1; 3144 } 3145 return 0; 3146 } 3147 3148 static int 3149 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3150 const uint8_t *ie) 3151 { 3152 const struct ieee80211_meshpeer_ie *meshpeer = 3153 (const struct ieee80211_meshpeer_ie *) ie; 3154 3155 if (meshpeer == NULL || 3156 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3157 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3158 return 1; 3159 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3160 IEEE80211_DPRINTF(vap, 3161 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3162 "Only MPM protocol is supported (proto: 0x%02X)", 3163 meshpeer->peer_proto); 3164 return 1; 3165 } 3166 switch (subtype) { 3167 case IEEE80211_ACTION_MESHPEERING_OPEN: 3168 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3169 return 1; 3170 break; 3171 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3172 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3173 return 1; 3174 break; 3175 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3176 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3177 return 1; 3178 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3179 meshpeer->peer_linkid != 0) 3180 return 1; 3181 if (meshpeer->peer_rcode == 0) 3182 return 1; 3183 break; 3184 } 3185 return 0; 3186 } 3187 3188 /* 3189 * Add a Mesh ID IE to a frame. 3190 */ 3191 uint8_t * 3192 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3193 { 3194 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3195 3196 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3197 3198 *frm++ = IEEE80211_ELEMID_MESHID; 3199 *frm++ = ms->ms_idlen; 3200 memcpy(frm, ms->ms_id, ms->ms_idlen); 3201 return frm + ms->ms_idlen; 3202 } 3203 3204 /* 3205 * Add a Mesh Configuration IE to a frame. 3206 * For now just use HWMP routing, Airtime link metric, Null Congestion 3207 * Signaling, Null Sync Protocol and Null Authentication. 3208 */ 3209 uint8_t * 3210 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3211 { 3212 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3213 uint16_t caps; 3214 3215 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3216 3217 *frm++ = IEEE80211_ELEMID_MESHCONF; 3218 *frm++ = IEEE80211_MESH_CONF_SZ; 3219 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3220 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3221 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3222 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3223 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3224 /* NB: set the number of neighbors before the rest */ 3225 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3226 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3227 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3228 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3229 frm += 1; 3230 caps = 0; 3231 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3232 caps |= IEEE80211_MESHCONF_CAP_AP; 3233 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3234 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3235 *frm++ = caps; 3236 return frm; 3237 } 3238 3239 /* 3240 * Add a Mesh Peer Management IE to a frame. 3241 */ 3242 uint8_t * 3243 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3244 uint16_t peerid, uint16_t reason) 3245 { 3246 3247 KASSERT(localid != 0, ("localid == 0")); 3248 3249 *frm++ = IEEE80211_ELEMID_MESHPEER; 3250 switch (subtype) { 3251 case IEEE80211_ACTION_MESHPEERING_OPEN: 3252 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3253 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3254 ADDSHORT(frm, localid); /* local ID */ 3255 break; 3256 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3257 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3258 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3259 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3260 ADDSHORT(frm, localid); /* local ID */ 3261 ADDSHORT(frm, peerid); /* peer ID */ 3262 break; 3263 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3264 if (peerid) 3265 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3266 else 3267 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3268 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3269 ADDSHORT(frm, localid); /* local ID */ 3270 if (peerid) 3271 ADDSHORT(frm, peerid); /* peer ID */ 3272 ADDSHORT(frm, reason); 3273 break; 3274 } 3275 return frm; 3276 } 3277 3278 /* 3279 * Compute an Airtime Link Metric for the link with this node. 3280 * 3281 * Based on Draft 3.0 spec (11B.10, p.149). 3282 */ 3283 /* 3284 * Max 802.11s overhead. 3285 */ 3286 #define IEEE80211_MESH_MAXOVERHEAD \ 3287 (sizeof(struct ieee80211_qosframe_addr4) \ 3288 + sizeof(struct ieee80211_meshcntl_ae10) \ 3289 + sizeof(struct llc) \ 3290 + IEEE80211_ADDR_LEN \ 3291 + IEEE80211_WEP_IVLEN \ 3292 + IEEE80211_WEP_KIDLEN \ 3293 + IEEE80211_WEP_CRCLEN \ 3294 + IEEE80211_WEP_MICLEN \ 3295 + IEEE80211_CRC_LEN) 3296 uint32_t 3297 mesh_airtime_calc(struct ieee80211_node *ni) 3298 { 3299 #define M_BITS 8 3300 #define S_FACTOR (2 * M_BITS) 3301 struct ieee80211com *ic = ni->ni_ic; 3302 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3303 const static int nbits = 8192 << M_BITS; 3304 uint32_t overhead, rate, errrate; 3305 uint64_t res; 3306 3307 /* Time to transmit a frame */ 3308 rate = ni->ni_txrate; 3309 overhead = ieee80211_compute_duration(ic->ic_rt, 3310 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3311 /* Error rate in percentage */ 3312 /* XXX assuming small failures are ok */ 3313 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + 3314 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) 3315 / 100; 3316 res = (overhead + (nbits / rate)) * 3317 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3318 3319 return (uint32_t)(res >> S_FACTOR); 3320 #undef M_BITS 3321 #undef S_FACTOR 3322 } 3323 3324 /* 3325 * Add a Mesh Link Metric report IE to a frame. 3326 */ 3327 uint8_t * 3328 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3329 { 3330 *frm++ = IEEE80211_ELEMID_MESHLINK; 3331 *frm++ = 5; 3332 *frm++ = flags; 3333 ADDWORD(frm, metric); 3334 return frm; 3335 } 3336 3337 /* 3338 * Add a Mesh Gate Announcement IE to a frame. 3339 */ 3340 uint8_t * 3341 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3342 { 3343 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3344 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3345 *frm++ = ie->gann_flags; 3346 *frm++ = ie->gann_hopcount; 3347 *frm++ = ie->gann_ttl; 3348 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3349 frm += 6; 3350 ADDWORD(frm, ie->gann_seq); 3351 ADDSHORT(frm, ie->gann_interval); 3352 return frm; 3353 } 3354 #undef ADDSHORT 3355 #undef ADDWORD 3356 3357 /* 3358 * Initialize any mesh-specific node state. 3359 */ 3360 void 3361 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3362 { 3363 ni->ni_flags |= IEEE80211_NODE_QOS; 3364 callout_init(&ni->ni_mltimer, 1); 3365 callout_init(&ni->ni_mlhtimer, 1); 3366 } 3367 3368 /* 3369 * Cleanup any mesh-specific node state. 3370 */ 3371 void 3372 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3373 { 3374 struct ieee80211vap *vap = ni->ni_vap; 3375 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3376 3377 callout_drain(&ni->ni_mltimer); 3378 callout_drain(&ni->ni_mlhtimer); 3379 /* NB: short-circuit callbacks after mesh_vdetach */ 3380 if (vap->iv_mesh != NULL) 3381 ms->ms_ppath->mpp_peerdown(ni); 3382 } 3383 3384 void 3385 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3386 { 3387 ni->ni_meshidlen = ie[1]; 3388 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3389 } 3390 3391 /* 3392 * Setup mesh-specific node state on neighbor discovery. 3393 */ 3394 void 3395 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3396 const struct ieee80211_frame *wh, 3397 const struct ieee80211_scanparams *sp) 3398 { 3399 ieee80211_parse_meshid(ni, sp->meshid); 3400 } 3401 3402 void 3403 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3404 struct ieee80211_beacon_offsets *bo) 3405 { 3406 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3407 3408 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3409 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3410 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3411 } 3412 } 3413 3414 static int 3415 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3416 { 3417 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3418 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3419 struct ieee80211_mesh_route *rt; 3420 struct ieee80211req_mesh_route *imr; 3421 size_t len, off; 3422 uint8_t *p; 3423 int error; 3424 3425 if (vap->iv_opmode != IEEE80211_M_MBSS) 3426 return ENOSYS; 3427 3428 error = 0; 3429 switch (ireq->i_type) { 3430 case IEEE80211_IOC_MESH_ID: 3431 ireq->i_len = ms->ms_idlen; 3432 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3433 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3434 break; 3435 case IEEE80211_IOC_MESH_AP: 3436 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3437 break; 3438 case IEEE80211_IOC_MESH_FWRD: 3439 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3440 break; 3441 case IEEE80211_IOC_MESH_GATE: 3442 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3443 break; 3444 case IEEE80211_IOC_MESH_TTL: 3445 ireq->i_val = ms->ms_ttl; 3446 break; 3447 case IEEE80211_IOC_MESH_RTCMD: 3448 switch (ireq->i_val) { 3449 case IEEE80211_MESH_RTCMD_LIST: 3450 len = 0; 3451 MESH_RT_LOCK(ms); 3452 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3453 len += sizeof(*imr); 3454 } 3455 MESH_RT_UNLOCK(ms); 3456 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3457 ireq->i_len = len; 3458 return ENOMEM; 3459 } 3460 ireq->i_len = len; 3461 /* XXX M_WAIT? */ 3462 p = IEEE80211_MALLOC(len, M_TEMP, 3463 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 3464 if (p == NULL) 3465 return ENOMEM; 3466 off = 0; 3467 MESH_RT_LOCK(ms); 3468 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3469 if (off >= len) 3470 break; 3471 imr = (struct ieee80211req_mesh_route *) 3472 (p + off); 3473 IEEE80211_ADDR_COPY(imr->imr_dest, 3474 rt->rt_dest); 3475 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3476 rt->rt_nexthop); 3477 imr->imr_metric = rt->rt_metric; 3478 imr->imr_nhops = rt->rt_nhops; 3479 imr->imr_lifetime = 3480 ieee80211_mesh_rt_update(rt, 0); 3481 imr->imr_lastmseq = rt->rt_lastmseq; 3482 imr->imr_flags = rt->rt_flags; /* last */ 3483 off += sizeof(*imr); 3484 } 3485 MESH_RT_UNLOCK(ms); 3486 error = copyout(p, (uint8_t *)ireq->i_data, 3487 ireq->i_len); 3488 IEEE80211_FREE(p, M_TEMP); 3489 break; 3490 case IEEE80211_MESH_RTCMD_FLUSH: 3491 case IEEE80211_MESH_RTCMD_ADD: 3492 case IEEE80211_MESH_RTCMD_DELETE: 3493 return EINVAL; 3494 default: 3495 return ENOSYS; 3496 } 3497 break; 3498 case IEEE80211_IOC_MESH_PR_METRIC: 3499 len = strlen(ms->ms_pmetric->mpm_descr); 3500 if (ireq->i_len < len) 3501 return EINVAL; 3502 ireq->i_len = len; 3503 error = copyout(ms->ms_pmetric->mpm_descr, 3504 (uint8_t *)ireq->i_data, len); 3505 break; 3506 case IEEE80211_IOC_MESH_PR_PATH: 3507 len = strlen(ms->ms_ppath->mpp_descr); 3508 if (ireq->i_len < len) 3509 return EINVAL; 3510 ireq->i_len = len; 3511 error = copyout(ms->ms_ppath->mpp_descr, 3512 (uint8_t *)ireq->i_data, len); 3513 break; 3514 default: 3515 return ENOSYS; 3516 } 3517 3518 return error; 3519 } 3520 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3521 3522 static int 3523 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3524 { 3525 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3526 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3527 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3528 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3529 int error; 3530 3531 if (vap->iv_opmode != IEEE80211_M_MBSS) 3532 return ENOSYS; 3533 3534 error = 0; 3535 switch (ireq->i_type) { 3536 case IEEE80211_IOC_MESH_ID: 3537 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3538 return EINVAL; 3539 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3540 if (error != 0) 3541 break; 3542 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3543 ms->ms_idlen = ireq->i_len; 3544 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3545 error = ENETRESET; 3546 break; 3547 case IEEE80211_IOC_MESH_AP: 3548 if (ireq->i_val) 3549 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3550 else 3551 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3552 error = ENETRESET; 3553 break; 3554 case IEEE80211_IOC_MESH_FWRD: 3555 if (ireq->i_val) 3556 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3557 else 3558 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3559 mesh_gatemode_setup(vap); 3560 break; 3561 case IEEE80211_IOC_MESH_GATE: 3562 if (ireq->i_val) 3563 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3564 else 3565 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3566 break; 3567 case IEEE80211_IOC_MESH_TTL: 3568 ms->ms_ttl = (uint8_t) ireq->i_val; 3569 break; 3570 case IEEE80211_IOC_MESH_RTCMD: 3571 switch (ireq->i_val) { 3572 case IEEE80211_MESH_RTCMD_LIST: 3573 return EINVAL; 3574 case IEEE80211_MESH_RTCMD_FLUSH: 3575 ieee80211_mesh_rt_flush(vap); 3576 break; 3577 case IEEE80211_MESH_RTCMD_ADD: 3578 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3579 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3580 return EINVAL; 3581 error = copyin(ireq->i_data, &tmpaddr, 3582 IEEE80211_ADDR_LEN); 3583 if (error == 0) 3584 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3585 break; 3586 case IEEE80211_MESH_RTCMD_DELETE: 3587 ieee80211_mesh_rt_del(vap, ireq->i_data); 3588 break; 3589 default: 3590 return ENOSYS; 3591 } 3592 break; 3593 case IEEE80211_IOC_MESH_PR_METRIC: 3594 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3595 if (error == 0) { 3596 error = mesh_select_proto_metric(vap, tmpproto); 3597 if (error == 0) 3598 error = ENETRESET; 3599 } 3600 break; 3601 case IEEE80211_IOC_MESH_PR_PATH: 3602 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3603 if (error == 0) { 3604 error = mesh_select_proto_path(vap, tmpproto); 3605 if (error == 0) 3606 error = ENETRESET; 3607 } 3608 break; 3609 default: 3610 return ENOSYS; 3611 } 3612 return error; 3613 } 3614 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3615