Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/net80211/ieee80211_mesh.c
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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, 0, 110 "IEEE 802.11s parameters"); 111 static int ieee80211_mesh_gateint = -1; 112 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW, 113 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 114 "mesh gate interval (ms)"); 115 static int ieee80211_mesh_retrytimeout = -1; 116 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, 117 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 118 "Retry timeout (msec)"); 119 static int ieee80211_mesh_holdingtimeout = -1; 120 121 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, 122 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 123 "Holding state timeout (msec)"); 124 static int ieee80211_mesh_confirmtimeout = -1; 125 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, 126 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 127 "Confirm state timeout (msec)"); 128 static int ieee80211_mesh_backofftimeout = -1; 129 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW, 130 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 131 "Backoff timeout (msec). This is to throutles peering forever when " 132 "not receiving answer or is rejected by a neighbor"); 133 static int ieee80211_mesh_maxretries = 2; 134 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW, 135 &ieee80211_mesh_maxretries, 0, 136 "Maximum retries during peer link establishment"); 137 static int ieee80211_mesh_maxholding = 2; 138 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW, 139 &ieee80211_mesh_maxholding, 0, 140 "Maximum times we are allowed to transition to HOLDING state before " 141 "backinoff during peer link establishment"); 142 143 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 144 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 145 146 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 147 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 148 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 149 static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 150 static ieee80211_recv_action_func mesh_recv_action_meshgate; 151 152 static ieee80211_send_action_func mesh_send_action_meshpeering_open; 153 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 154 static ieee80211_send_action_func mesh_send_action_meshpeering_close; 155 static ieee80211_send_action_func mesh_send_action_meshlmetric; 156 static ieee80211_send_action_func mesh_send_action_meshgate; 157 158 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 159 .mpm_descr = "AIRTIME", 160 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 161 .mpm_metric = mesh_airtime_calc, 162 }; 163 164 static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 165 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 166 167 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 168 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 169 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 170 171 /* The longer one of the lifetime should be stored as new lifetime */ 172 #define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 173 174 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 175 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 176 177 /* 178 * Helper functions to manipulate the Mesh routing table. 179 */ 180 181 static struct ieee80211_mesh_route * 182 mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 183 const uint8_t dest[IEEE80211_ADDR_LEN]) 184 { 185 struct ieee80211_mesh_route *rt; 186 187 MESH_RT_LOCK_ASSERT(ms); 188 189 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 190 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 191 return rt; 192 } 193 return NULL; 194 } 195 196 static struct ieee80211_mesh_route * 197 mesh_rt_add_locked(struct ieee80211vap *vap, 198 const uint8_t dest[IEEE80211_ADDR_LEN]) 199 { 200 struct ieee80211_mesh_state *ms = vap->iv_mesh; 201 struct ieee80211_mesh_route *rt; 202 203 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 204 ("%s: adding broadcast to the routing table", __func__)); 205 206 MESH_RT_LOCK_ASSERT(ms); 207 208 rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) + 209 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, 210 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 211 if (rt != NULL) { 212 rt->rt_vap = vap; 213 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 214 rt->rt_priv = (void *)ALIGN(&rt[1]); 215 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT"); 216 callout_init(&rt->rt_discovery, 1); 217 rt->rt_updtime = ticks; /* create time */ 218 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 219 } 220 return rt; 221 } 222 223 struct ieee80211_mesh_route * 224 ieee80211_mesh_rt_find(struct ieee80211vap *vap, 225 const uint8_t dest[IEEE80211_ADDR_LEN]) 226 { 227 struct ieee80211_mesh_state *ms = vap->iv_mesh; 228 struct ieee80211_mesh_route *rt; 229 230 MESH_RT_LOCK(ms); 231 rt = mesh_rt_find_locked(ms, dest); 232 MESH_RT_UNLOCK(ms); 233 return rt; 234 } 235 236 struct ieee80211_mesh_route * 237 ieee80211_mesh_rt_add(struct ieee80211vap *vap, 238 const uint8_t dest[IEEE80211_ADDR_LEN]) 239 { 240 struct ieee80211_mesh_state *ms = vap->iv_mesh; 241 struct ieee80211_mesh_route *rt; 242 243 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 244 ("%s: duplicate entry in the routing table", __func__)); 245 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 246 ("%s: adding self to the routing table", __func__)); 247 248 MESH_RT_LOCK(ms); 249 rt = mesh_rt_add_locked(vap, dest); 250 MESH_RT_UNLOCK(ms); 251 return rt; 252 } 253 254 /* 255 * Update the route lifetime and returns the updated lifetime. 256 * If new_lifetime is zero and route is timedout it will be invalidated. 257 * new_lifetime is in msec 258 */ 259 int 260 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 261 { 262 int timesince, now; 263 uint32_t lifetime = 0; 264 265 KASSERT(rt != NULL, ("route is NULL")); 266 267 now = ticks; 268 MESH_RT_ENTRY_LOCK(rt); 269 270 /* dont clobber a proxy entry gated by us */ 271 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 272 MESH_RT_ENTRY_UNLOCK(rt); 273 return rt->rt_lifetime; 274 } 275 276 timesince = ticks_to_msecs(now - rt->rt_updtime); 277 rt->rt_updtime = now; 278 if (timesince >= rt->rt_lifetime) { 279 if (new_lifetime != 0) { 280 rt->rt_lifetime = new_lifetime; 281 } 282 else { 283 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 284 rt->rt_lifetime = 0; 285 } 286 } else { 287 /* update what is left of lifetime */ 288 rt->rt_lifetime = rt->rt_lifetime - timesince; 289 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 290 new_lifetime, rt->rt_lifetime); 291 } 292 lifetime = rt->rt_lifetime; 293 MESH_RT_ENTRY_UNLOCK(rt); 294 295 return lifetime; 296 } 297 298 /* 299 * Add a proxy route (as needed) for the specified destination. 300 */ 301 void 302 ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 303 const uint8_t dest[IEEE80211_ADDR_LEN]) 304 { 305 struct ieee80211_mesh_state *ms = vap->iv_mesh; 306 struct ieee80211_mesh_route *rt; 307 308 MESH_RT_LOCK(ms); 309 rt = mesh_rt_find_locked(ms, dest); 310 if (rt == NULL) { 311 rt = mesh_rt_add_locked(vap, dest); 312 if (rt == NULL) { 313 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 314 "%s", "unable to add proxy entry"); 315 vap->iv_stats.is_mesh_rtaddfailed++; 316 } else { 317 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 318 "%s", "add proxy entry"); 319 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 320 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 321 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 322 | IEEE80211_MESHRT_FLAGS_PROXY; 323 } 324 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 325 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 326 ("no proxy flag for poxy entry")); 327 struct ieee80211com *ic = vap->iv_ic; 328 /* 329 * Fix existing entry created by received frames from 330 * stations that have some memory of dest. We also 331 * flush any frames held on the staging queue; delivering 332 * them is too much trouble right now. 333 */ 334 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 335 "%s", "fix proxy entry"); 336 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 337 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 338 | IEEE80211_MESHRT_FLAGS_PROXY; 339 /* XXX belongs in hwmp */ 340 ieee80211_ageq_drain_node(&ic->ic_stageq, 341 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 342 /* XXX stat? */ 343 } 344 MESH_RT_UNLOCK(ms); 345 } 346 347 static __inline void 348 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 349 { 350 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 351 /* 352 * Grab the lock before destroying it, to be sure no one else 353 * is holding the route. 354 */ 355 MESH_RT_ENTRY_LOCK(rt); 356 callout_drain(&rt->rt_discovery); 357 MESH_RT_ENTRY_LOCK_DESTROY(rt); 358 IEEE80211_FREE(rt, M_80211_MESH_RT); 359 } 360 361 void 362 ieee80211_mesh_rt_del(struct ieee80211vap *vap, 363 const uint8_t dest[IEEE80211_ADDR_LEN]) 364 { 365 struct ieee80211_mesh_state *ms = vap->iv_mesh; 366 struct ieee80211_mesh_route *rt, *next; 367 368 MESH_RT_LOCK(ms); 369 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 370 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 371 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 372 ms->ms_ppath->mpp_senderror(vap, dest, rt, 373 IEEE80211_REASON_MESH_PERR_NO_PROXY); 374 } else { 375 ms->ms_ppath->mpp_senderror(vap, dest, rt, 376 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 377 } 378 mesh_rt_del(ms, rt); 379 MESH_RT_UNLOCK(ms); 380 return; 381 } 382 } 383 MESH_RT_UNLOCK(ms); 384 } 385 386 void 387 ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 388 { 389 struct ieee80211_mesh_state *ms = vap->iv_mesh; 390 struct ieee80211_mesh_route *rt, *next; 391 392 if (ms == NULL) 393 return; 394 MESH_RT_LOCK(ms); 395 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 396 mesh_rt_del(ms, rt); 397 MESH_RT_UNLOCK(ms); 398 } 399 400 void 401 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 402 const uint8_t peer[IEEE80211_ADDR_LEN]) 403 { 404 struct ieee80211_mesh_state *ms = vap->iv_mesh; 405 struct ieee80211_mesh_route *rt, *next; 406 407 MESH_RT_LOCK(ms); 408 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 409 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 410 mesh_rt_del(ms, rt); 411 } 412 MESH_RT_UNLOCK(ms); 413 } 414 415 /* 416 * Flush expired routing entries, i.e. those in invalid state for 417 * some time. 418 */ 419 static void 420 mesh_rt_flush_invalid(struct ieee80211vap *vap) 421 { 422 struct ieee80211_mesh_state *ms = vap->iv_mesh; 423 struct ieee80211_mesh_route *rt, *next; 424 425 if (ms == NULL) 426 return; 427 MESH_RT_LOCK(ms); 428 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 429 /* Discover paths will be deleted by their own callout */ 430 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 431 continue; 432 ieee80211_mesh_rt_update(rt, 0); 433 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 434 mesh_rt_del(ms, rt); 435 } 436 MESH_RT_UNLOCK(ms); 437 } 438 439 int 440 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 441 { 442 int i, firstempty = -1; 443 444 for (i = 0; i < nitems(mesh_proto_paths); i++) { 445 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 446 IEEE80211_MESH_PROTO_DSZ) == 0) 447 return EEXIST; 448 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 449 firstempty = i; 450 } 451 if (firstempty < 0) 452 return ENOSPC; 453 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 454 mesh_proto_paths[firstempty].mpp_active = 1; 455 return 0; 456 } 457 458 int 459 ieee80211_mesh_register_proto_metric(const struct 460 ieee80211_mesh_proto_metric *mpm) 461 { 462 int i, firstempty = -1; 463 464 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 465 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 466 IEEE80211_MESH_PROTO_DSZ) == 0) 467 return EEXIST; 468 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 469 firstempty = i; 470 } 471 if (firstempty < 0) 472 return ENOSPC; 473 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 474 mesh_proto_metrics[firstempty].mpm_active = 1; 475 return 0; 476 } 477 478 static int 479 mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 480 { 481 struct ieee80211_mesh_state *ms = vap->iv_mesh; 482 int i; 483 484 for (i = 0; i < nitems(mesh_proto_paths); i++) { 485 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 486 ms->ms_ppath = &mesh_proto_paths[i]; 487 return 0; 488 } 489 } 490 return ENOENT; 491 } 492 493 static int 494 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 495 { 496 struct ieee80211_mesh_state *ms = vap->iv_mesh; 497 int i; 498 499 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 500 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 501 ms->ms_pmetric = &mesh_proto_metrics[i]; 502 return 0; 503 } 504 } 505 return ENOENT; 506 } 507 508 static void 509 mesh_gatemode_setup(struct ieee80211vap *vap) 510 { 511 struct ieee80211_mesh_state *ms = vap->iv_mesh; 512 513 /* 514 * NB: When a mesh gate is running as a ROOT it shall 515 * not send out periodic GANNs but instead mark the 516 * mesh gate flag for the corresponding proactive PREQ 517 * and RANN frames. 518 */ 519 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 520 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 521 callout_drain(&ms->ms_gatetimer); 522 return ; 523 } 524 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 525 mesh_gatemode_cb, vap); 526 } 527 528 static void 529 mesh_gatemode_cb(void *arg) 530 { 531 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 532 struct ieee80211_mesh_state *ms = vap->iv_mesh; 533 struct ieee80211_meshgann_ie gann; 534 535 gann.gann_flags = 0; /* Reserved */ 536 gann.gann_hopcount = 0; 537 gann.gann_ttl = ms->ms_ttl; 538 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 539 gann.gann_seq = ms->ms_gateseq++; 540 gann.gann_interval = ieee80211_mesh_gateint; 541 542 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 543 "send broadcast GANN (seq %u)", gann.gann_seq); 544 545 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 546 IEEE80211_ACTION_MESH_GANN, &gann); 547 mesh_gatemode_setup(vap); 548 } 549 550 static void 551 ieee80211_mesh_init(void) 552 { 553 554 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 555 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 556 557 /* 558 * Setup mesh parameters that depends on the clock frequency. 559 */ 560 ieee80211_mesh_gateint = msecs_to_ticks(10000); 561 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 562 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 563 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 564 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 565 566 /* 567 * Register action frame handlers. 568 */ 569 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 570 IEEE80211_ACTION_MESHPEERING_OPEN, 571 mesh_recv_action_meshpeering_open); 572 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 573 IEEE80211_ACTION_MESHPEERING_CONFIRM, 574 mesh_recv_action_meshpeering_confirm); 575 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 576 IEEE80211_ACTION_MESHPEERING_CLOSE, 577 mesh_recv_action_meshpeering_close); 578 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 579 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 580 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 581 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 582 583 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 584 IEEE80211_ACTION_MESHPEERING_OPEN, 585 mesh_send_action_meshpeering_open); 586 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 587 IEEE80211_ACTION_MESHPEERING_CONFIRM, 588 mesh_send_action_meshpeering_confirm); 589 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 590 IEEE80211_ACTION_MESHPEERING_CLOSE, 591 mesh_send_action_meshpeering_close); 592 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 593 IEEE80211_ACTION_MESH_LMETRIC, 594 mesh_send_action_meshlmetric); 595 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 596 IEEE80211_ACTION_MESH_GANN, 597 mesh_send_action_meshgate); 598 599 /* 600 * Register Airtime Link Metric. 601 */ 602 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 603 604 } 605 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 606 607 void 608 ieee80211_mesh_attach(struct ieee80211com *ic) 609 { 610 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 611 } 612 613 void 614 ieee80211_mesh_detach(struct ieee80211com *ic) 615 { 616 } 617 618 static void 619 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 620 { 621 struct ieee80211com *ic = ni->ni_ic; 622 uint16_t args[3]; 623 624 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 625 args[0] = ni->ni_mlpid; 626 args[1] = ni->ni_mllid; 627 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 628 ieee80211_send_action(ni, 629 IEEE80211_ACTION_CAT_SELF_PROT, 630 IEEE80211_ACTION_MESHPEERING_CLOSE, 631 args); 632 } 633 callout_drain(&ni->ni_mltimer); 634 /* XXX belongs in hwmp */ 635 ieee80211_ageq_drain_node(&ic->ic_stageq, 636 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 637 } 638 639 static void 640 mesh_vdetach(struct ieee80211vap *vap) 641 { 642 struct ieee80211_mesh_state *ms = vap->iv_mesh; 643 644 callout_drain(&ms->ms_cleantimer); 645 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 646 NULL); 647 ieee80211_mesh_rt_flush(vap); 648 MESH_RT_LOCK_DESTROY(ms); 649 ms->ms_ppath->mpp_vdetach(vap); 650 IEEE80211_FREE(vap->iv_mesh, M_80211_VAP); 651 vap->iv_mesh = NULL; 652 } 653 654 static void 655 mesh_vattach(struct ieee80211vap *vap) 656 { 657 struct ieee80211_mesh_state *ms; 658 vap->iv_newstate = mesh_newstate; 659 vap->iv_input = mesh_input; 660 vap->iv_opdetach = mesh_vdetach; 661 vap->iv_recv_mgmt = mesh_recv_mgmt; 662 vap->iv_recv_ctl = mesh_recv_ctl; 663 ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 664 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 665 if (ms == NULL) { 666 printf("%s: couldn't alloc MBSS state\n", __func__); 667 return; 668 } 669 vap->iv_mesh = ms; 670 ms->ms_seq = 0; 671 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 672 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 673 TAILQ_INIT(&ms->ms_known_gates); 674 TAILQ_INIT(&ms->ms_routes); 675 MESH_RT_LOCK_INIT(ms, "MBSS"); 676 callout_init(&ms->ms_cleantimer, 1); 677 callout_init(&ms->ms_gatetimer, 1); 678 ms->ms_gateseq = 0; 679 mesh_select_proto_metric(vap, "AIRTIME"); 680 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 681 mesh_select_proto_path(vap, "HWMP"); 682 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 683 ms->ms_ppath->mpp_vattach(vap); 684 } 685 686 /* 687 * IEEE80211_M_MBSS vap state machine handler. 688 */ 689 static int 690 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 691 { 692 struct ieee80211_mesh_state *ms = vap->iv_mesh; 693 struct ieee80211com *ic = vap->iv_ic; 694 struct ieee80211_node *ni; 695 enum ieee80211_state ostate; 696 697 IEEE80211_LOCK_ASSERT(ic); 698 699 ostate = vap->iv_state; 700 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 701 __func__, ieee80211_state_name[ostate], 702 ieee80211_state_name[nstate], arg); 703 vap->iv_state = nstate; /* state transition */ 704 if (ostate != IEEE80211_S_SCAN) 705 ieee80211_cancel_scan(vap); /* background scan */ 706 ni = vap->iv_bss; /* NB: no reference held */ 707 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 708 callout_drain(&ms->ms_cleantimer); 709 callout_drain(&ms->ms_gatetimer); 710 } 711 switch (nstate) { 712 case IEEE80211_S_INIT: 713 switch (ostate) { 714 case IEEE80211_S_SCAN: 715 ieee80211_cancel_scan(vap); 716 break; 717 case IEEE80211_S_CAC: 718 ieee80211_dfs_cac_stop(vap); 719 break; 720 case IEEE80211_S_RUN: 721 ieee80211_iterate_nodes(&ic->ic_sta, 722 mesh_vdetach_peers, NULL); 723 break; 724 default: 725 break; 726 } 727 if (ostate != IEEE80211_S_INIT) { 728 /* NB: optimize INIT -> INIT case */ 729 ieee80211_reset_bss(vap); 730 ieee80211_mesh_rt_flush(vap); 731 } 732 break; 733 case IEEE80211_S_SCAN: 734 switch (ostate) { 735 case IEEE80211_S_INIT: 736 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 737 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 738 ms->ms_idlen != 0) { 739 /* 740 * Already have a channel and a mesh ID; bypass 741 * the scan and startup immediately. 742 */ 743 ieee80211_create_ibss(vap, vap->iv_des_chan); 744 break; 745 } 746 /* 747 * Initiate a scan. We can come here as a result 748 * of an IEEE80211_IOC_SCAN_REQ too in which case 749 * the vap will be marked with IEEE80211_FEXT_SCANREQ 750 * and the scan request parameters will be present 751 * in iv_scanreq. Otherwise we do the default. 752 */ 753 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 754 ieee80211_check_scan(vap, 755 vap->iv_scanreq_flags, 756 vap->iv_scanreq_duration, 757 vap->iv_scanreq_mindwell, 758 vap->iv_scanreq_maxdwell, 759 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 760 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 761 } else 762 ieee80211_check_scan_current(vap); 763 break; 764 default: 765 break; 766 } 767 break; 768 case IEEE80211_S_CAC: 769 /* 770 * Start CAC on a DFS channel. We come here when starting 771 * a bss on a DFS channel (see ieee80211_create_ibss). 772 */ 773 ieee80211_dfs_cac_start(vap); 774 break; 775 case IEEE80211_S_RUN: 776 switch (ostate) { 777 case IEEE80211_S_INIT: 778 /* 779 * Already have a channel; bypass the 780 * scan and startup immediately. 781 * Note that ieee80211_create_ibss will call 782 * back to do a RUN->RUN state change. 783 */ 784 ieee80211_create_ibss(vap, 785 ieee80211_ht_adjust_channel(ic, 786 ic->ic_curchan, vap->iv_flags_ht)); 787 /* NB: iv_bss is changed on return */ 788 break; 789 case IEEE80211_S_CAC: 790 /* 791 * NB: This is the normal state change when CAC 792 * expires and no radar was detected; no need to 793 * clear the CAC timer as it's already expired. 794 */ 795 /* fall thru... */ 796 case IEEE80211_S_CSA: 797 #if 0 798 /* 799 * Shorten inactivity timer of associated stations 800 * to weed out sta's that don't follow a CSA. 801 */ 802 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 803 #endif 804 /* 805 * Update bss node channel to reflect where 806 * we landed after CSA. 807 */ 808 ieee80211_node_set_chan(ni, 809 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 810 ieee80211_htchanflags(ni->ni_chan))); 811 /* XXX bypass debug msgs */ 812 break; 813 case IEEE80211_S_SCAN: 814 case IEEE80211_S_RUN: 815 #ifdef IEEE80211_DEBUG 816 if (ieee80211_msg_debug(vap)) { 817 ieee80211_note(vap, 818 "synchronized with %s meshid ", 819 ether_sprintf(ni->ni_meshid)); 820 ieee80211_print_essid(ni->ni_meshid, 821 ni->ni_meshidlen); 822 /* XXX MCS/HT */ 823 printf(" channel %d\n", 824 ieee80211_chan2ieee(ic, ic->ic_curchan)); 825 } 826 #endif 827 break; 828 default: 829 break; 830 } 831 ieee80211_node_authorize(ni); 832 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 833 mesh_rt_cleanup_cb, vap); 834 mesh_gatemode_setup(vap); 835 break; 836 default: 837 break; 838 } 839 /* NB: ostate not nstate */ 840 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 841 return 0; 842 } 843 844 static void 845 mesh_rt_cleanup_cb(void *arg) 846 { 847 struct ieee80211vap *vap = arg; 848 struct ieee80211_mesh_state *ms = vap->iv_mesh; 849 850 mesh_rt_flush_invalid(vap); 851 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 852 mesh_rt_cleanup_cb, vap); 853 } 854 855 /* 856 * Mark a mesh STA as gate and return a pointer to it. 857 * If this is first time, we create a new gate route. 858 * Always update the path route to this mesh gate. 859 */ 860 struct ieee80211_mesh_gate_route * 861 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 862 struct ieee80211_mesh_route *rt) 863 { 864 struct ieee80211_mesh_state *ms = vap->iv_mesh; 865 struct ieee80211_mesh_gate_route *gr = NULL, *next; 866 int found = 0; 867 868 MESH_RT_LOCK(ms); 869 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 870 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 871 found = 1; 872 break; 873 } 874 } 875 876 if (!found) { 877 /* New mesh gate add it to known table. */ 878 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 879 "%s", "stored new gate information from pro-PREQ."); 880 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 881 M_80211_MESH_GT_RT, 882 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 883 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 884 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 885 } 886 gr->gr_route = rt; 887 /* TODO: link from path route to gate route */ 888 MESH_RT_UNLOCK(ms); 889 890 return gr; 891 } 892 893 894 /* 895 * Helper function to note the Mesh Peer Link FSM change. 896 */ 897 static void 898 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 899 { 900 struct ieee80211vap *vap = ni->ni_vap; 901 struct ieee80211_mesh_state *ms = vap->iv_mesh; 902 #ifdef IEEE80211_DEBUG 903 static const char *meshlinkstates[] = { 904 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 905 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 906 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 907 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 908 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 909 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 910 }; 911 #endif 912 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 913 ni, "peer link: %s -> %s", 914 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 915 916 /* track neighbor count */ 917 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 918 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 919 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 920 ms->ms_neighbors++; 921 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 922 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 923 state != IEEE80211_NODE_MESH_ESTABLISHED) { 924 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 925 ms->ms_neighbors--; 926 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 927 } 928 ni->ni_mlstate = state; 929 switch (state) { 930 case IEEE80211_NODE_MESH_HOLDING: 931 ms->ms_ppath->mpp_peerdown(ni); 932 break; 933 case IEEE80211_NODE_MESH_ESTABLISHED: 934 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 935 break; 936 default: 937 break; 938 } 939 } 940 941 /* 942 * Helper function to generate a unique local ID required for mesh 943 * peer establishment. 944 */ 945 static void 946 mesh_checkid(void *arg, struct ieee80211_node *ni) 947 { 948 uint16_t *r = arg; 949 950 if (*r == ni->ni_mllid) 951 *(uint16_t *)arg = 0; 952 } 953 954 static uint32_t 955 mesh_generateid(struct ieee80211vap *vap) 956 { 957 int maxiter = 4; 958 uint16_t r; 959 960 do { 961 get_random_bytes(&r, 2); 962 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 963 maxiter--; 964 } while (r == 0 && maxiter > 0); 965 return r; 966 } 967 968 /* 969 * Verifies if we already received this packet by checking its 970 * sequence number. 971 * Returns 0 if the frame is to be accepted, 1 otherwise. 972 */ 973 static int 974 mesh_checkpseq(struct ieee80211vap *vap, 975 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 976 { 977 struct ieee80211_mesh_route *rt; 978 979 rt = ieee80211_mesh_rt_find(vap, source); 980 if (rt == NULL) { 981 rt = ieee80211_mesh_rt_add(vap, source); 982 if (rt == NULL) { 983 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 984 "%s", "add mcast route failed"); 985 vap->iv_stats.is_mesh_rtaddfailed++; 986 return 1; 987 } 988 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 989 "add mcast route, mesh seqno %d", seq); 990 rt->rt_lastmseq = seq; 991 return 0; 992 } 993 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 994 return 1; 995 } else { 996 rt->rt_lastmseq = seq; 997 return 0; 998 } 999 } 1000 1001 /* 1002 * Iterate the routing table and locate the next hop. 1003 */ 1004 struct ieee80211_node * 1005 ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1006 const uint8_t dest[IEEE80211_ADDR_LEN]) 1007 { 1008 struct ieee80211_mesh_route *rt; 1009 1010 rt = ieee80211_mesh_rt_find(vap, dest); 1011 if (rt == NULL) 1012 return NULL; 1013 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1014 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1015 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1016 /* XXX stat */ 1017 return NULL; 1018 } 1019 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1020 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1021 if (rt == NULL) return NULL; 1022 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1023 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1024 "%s: meshgate !valid, flags 0x%x", __func__, 1025 rt->rt_flags); 1026 /* XXX stat */ 1027 return NULL; 1028 } 1029 } 1030 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1031 } 1032 1033 static void 1034 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1035 struct ieee80211_mesh_route *rt_gate) 1036 { 1037 struct ifnet *ifp = vap->iv_ifp; 1038 struct ieee80211_node *ni; 1039 1040 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1041 1042 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1043 if (ni == NULL) { 1044 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1045 m_freem(m); 1046 return; 1047 } 1048 1049 /* 1050 * Send through the VAP packet transmit path. 1051 * This consumes the node ref grabbed above and 1052 * the mbuf, regardless of whether there's a problem 1053 * or not. 1054 */ 1055 (void) ieee80211_vap_pkt_send_dest(vap, m, ni); 1056 } 1057 1058 /* 1059 * Forward the queued frames to known valid mesh gates. 1060 * Assume destination to be outside the MBSS (i.e. proxy entry), 1061 * If no valid mesh gates are known silently discard queued frames. 1062 * After transmitting frames to all known valid mesh gates, this route 1063 * will be marked invalid, and a new path discovery will happen in the hopes 1064 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1065 */ 1066 void 1067 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1068 struct ieee80211_mesh_route *rt_dest) 1069 { 1070 struct ieee80211com *ic = vap->iv_ic; 1071 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1072 struct ieee80211_mesh_route *rt_gate; 1073 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1074 struct mbuf *m, *mcopy, *next; 1075 1076 IEEE80211_TX_UNLOCK_ASSERT(ic); 1077 1078 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1079 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1080 1081 /* XXX: send to more than one valid mash gate */ 1082 MESH_RT_LOCK(ms); 1083 1084 m = ieee80211_ageq_remove(&ic->ic_stageq, 1085 (struct ieee80211_node *)(uintptr_t) 1086 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1087 1088 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1089 rt_gate = gr->gr_route; 1090 if (rt_gate == NULL) { 1091 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1092 rt_dest->rt_dest, 1093 "mesh gate with no path %6D", 1094 gr->gr_addr, ":"); 1095 continue; 1096 } 1097 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1098 continue; 1099 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1100 ("route not marked as a mesh gate")); 1101 KASSERT((rt_gate->rt_flags & 1102 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1103 ("found mesh gate that is also marked porxy")); 1104 /* 1105 * convert route to a proxy route gated by the current 1106 * mesh gate, this is needed so encap can built data 1107 * frame with correct address. 1108 */ 1109 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1110 IEEE80211_MESHRT_FLAGS_VALID; 1111 rt_dest->rt_ext_seq = 1; /* random value */ 1112 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1113 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1114 rt_dest->rt_metric = rt_gate->rt_metric; 1115 rt_dest->rt_nhops = rt_gate->rt_nhops; 1116 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1117 MESH_RT_UNLOCK(ms); 1118 /* XXX: lock?? */ 1119 mcopy = m_dup(m, M_NOWAIT); 1120 for (; mcopy != NULL; mcopy = next) { 1121 next = mcopy->m_nextpkt; 1122 mcopy->m_nextpkt = NULL; 1123 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1124 rt_dest->rt_dest, 1125 "flush queued frame %p len %d", mcopy, 1126 mcopy->m_pkthdr.len); 1127 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1128 } 1129 MESH_RT_LOCK(ms); 1130 } 1131 rt_dest->rt_flags = 0; /* Mark invalid */ 1132 m_freem(m); 1133 MESH_RT_UNLOCK(ms); 1134 } 1135 1136 /* 1137 * Forward the specified frame. 1138 * Decrement the TTL and set TA to our MAC address. 1139 */ 1140 static void 1141 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1142 const struct ieee80211_meshcntl *mc) 1143 { 1144 struct ieee80211com *ic = vap->iv_ic; 1145 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1146 struct ifnet *ifp = vap->iv_ifp; 1147 const struct ieee80211_frame *wh = 1148 mtod(m, const struct ieee80211_frame *); 1149 struct mbuf *mcopy; 1150 struct ieee80211_meshcntl *mccopy; 1151 struct ieee80211_frame *whcopy; 1152 struct ieee80211_node *ni; 1153 int err; 1154 1155 /* This is called from the RX path - don't hold this lock */ 1156 IEEE80211_TX_UNLOCK_ASSERT(ic); 1157 1158 /* 1159 * mesh ttl of 1 means we are the last one receiving it, 1160 * according to amendment we decrement and then check if 1161 * 0, if so we dont forward. 1162 */ 1163 if (mc->mc_ttl < 1) { 1164 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1165 "%s", "frame not fwd'd, ttl 1"); 1166 vap->iv_stats.is_mesh_fwd_ttl++; 1167 return; 1168 } 1169 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1170 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1171 "%s", "frame not fwd'd, fwding disabled"); 1172 vap->iv_stats.is_mesh_fwd_disabled++; 1173 return; 1174 } 1175 mcopy = m_dup(m, M_NOWAIT); 1176 if (mcopy == NULL) { 1177 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1178 "%s", "frame not fwd'd, cannot dup"); 1179 vap->iv_stats.is_mesh_fwd_nobuf++; 1180 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1181 return; 1182 } 1183 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1184 sizeof(struct ieee80211_meshcntl)); 1185 if (mcopy == NULL) { 1186 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1187 "%s", "frame not fwd'd, too short"); 1188 vap->iv_stats.is_mesh_fwd_tooshort++; 1189 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1190 m_freem(mcopy); 1191 return; 1192 } 1193 whcopy = mtod(mcopy, struct ieee80211_frame *); 1194 mccopy = (struct ieee80211_meshcntl *) 1195 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1196 /* XXX clear other bits? */ 1197 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1198 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1199 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1200 ni = ieee80211_ref_node(vap->iv_bss); 1201 mcopy->m_flags |= M_MCAST; 1202 } else { 1203 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1204 if (ni == NULL) { 1205 /* 1206 * [Optional] any of the following three actions: 1207 * o silently discard 1208 * o trigger a path discovery 1209 * o inform TA that meshDA is unknown. 1210 */ 1211 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1212 "%s", "frame not fwd'd, no path"); 1213 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1214 IEEE80211_REASON_MESH_PERR_NO_FI); 1215 vap->iv_stats.is_mesh_fwd_nopath++; 1216 m_freem(mcopy); 1217 return; 1218 } 1219 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1220 } 1221 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1222 mccopy->mc_ttl--; 1223 1224 /* XXX calculate priority so drivers can find the tx queue */ 1225 M_WME_SETAC(mcopy, WME_AC_BE); 1226 1227 /* XXX do we know m_nextpkt is NULL? */ 1228 mcopy->m_pkthdr.rcvif = (void *) ni; 1229 1230 /* 1231 * XXX this bypasses all of the VAP TX handling; it passes frames 1232 * directly to the parent interface. 1233 * 1234 * Because of this, there's no TX lock being held as there's no 1235 * encaps state being used. 1236 * 1237 * Doing a direct parent transmit may not be the correct thing 1238 * to do here; we'll have to re-think this soon. 1239 */ 1240 IEEE80211_TX_LOCK(ic); 1241 err = ieee80211_parent_xmitpkt(ic, mcopy); 1242 IEEE80211_TX_UNLOCK(ic); 1243 if (!err) 1244 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1245 } 1246 1247 static struct mbuf * 1248 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1249 { 1250 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1251 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1252 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1253 sizeof(struct ieee80211_meshcntl_ae10)]; 1254 const struct ieee80211_qosframe_addr4 *wh; 1255 const struct ieee80211_meshcntl_ae10 *mc; 1256 struct ether_header *eh; 1257 struct llc *llc; 1258 int ae; 1259 1260 if (m->m_len < hdrlen + sizeof(*llc) && 1261 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1262 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1263 "discard data frame: %s", "m_pullup failed"); 1264 vap->iv_stats.is_rx_tooshort++; 1265 return NULL; 1266 } 1267 memcpy(b, mtod(m, caddr_t), hdrlen); 1268 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1269 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1270 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1271 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1272 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1273 1274 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1275 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1276 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1277 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1278 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1279 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1280 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1281 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1282 llc = NULL; 1283 } else { 1284 m_adj(m, hdrlen - sizeof(*eh)); 1285 } 1286 eh = mtod(m, struct ether_header *); 1287 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1288 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1289 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1290 if (ae == IEEE80211_MESH_AE_00) { 1291 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1292 } else if (ae == IEEE80211_MESH_AE_01) { 1293 IEEE80211_ADDR_COPY(eh->ether_shost, 1294 MC01(mc)->mc_addr4); 1295 } else { 1296 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1297 (const struct ieee80211_frame *)wh, NULL, 1298 "bad AE %d", ae); 1299 vap->iv_stats.is_mesh_badae++; 1300 m_freem(m); 1301 return NULL; 1302 } 1303 } else { 1304 if (ae == IEEE80211_MESH_AE_00) { 1305 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1306 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1307 } else if (ae == IEEE80211_MESH_AE_10) { 1308 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1309 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1310 } else { 1311 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1312 (const struct ieee80211_frame *)wh, NULL, 1313 "bad AE %d", ae); 1314 vap->iv_stats.is_mesh_badae++; 1315 m_freem(m); 1316 return NULL; 1317 } 1318 } 1319 #ifndef __NO_STRICT_ALIGNMENT 1320 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1321 m = ieee80211_realign(vap, m, sizeof(*eh)); 1322 if (m == NULL) 1323 return NULL; 1324 } 1325 #endif /* !__NO_STRICT_ALIGNMENT */ 1326 if (llc != NULL) { 1327 eh = mtod(m, struct ether_header *); 1328 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1329 } 1330 return m; 1331 #undef WDIR 1332 #undef MC01 1333 } 1334 1335 /* 1336 * Return non-zero if the unicast mesh data frame should be processed 1337 * locally. Frames that are not proxy'd have our address, otherwise 1338 * we need to consult the routing table to look for a proxy entry. 1339 */ 1340 static __inline int 1341 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1342 const struct ieee80211_meshcntl *mc) 1343 { 1344 int ae = mc->mc_flags & 3; 1345 1346 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1347 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1348 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1349 ("bad AE %d", ae)); 1350 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1351 const struct ieee80211_meshcntl_ae10 *mc10 = 1352 (const struct ieee80211_meshcntl_ae10 *) mc; 1353 struct ieee80211_mesh_route *rt = 1354 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1355 /* check for proxy route to ourself */ 1356 return (rt != NULL && 1357 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1358 } else /* ucast w/o proxy */ 1359 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1360 } 1361 1362 /* 1363 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1364 * > 0 means we have forwarded data and no need to process locally 1365 * == 0 means we want to process locally (and we may have forwarded data 1366 * < 0 means there was an error and data should be discarded 1367 */ 1368 static int 1369 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1370 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1371 { 1372 struct ieee80211_qosframe_addr4 *qwh; 1373 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1374 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1375 1376 /* This is called from the RX path - don't hold this lock */ 1377 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1378 1379 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1380 1381 /* 1382 * TODO: 1383 * o verify addr2 is a legitimate transmitter 1384 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1385 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1386 */ 1387 1388 /* set lifetime of addr3 (meshDA) to initial value */ 1389 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1390 if (rt_meshda == NULL) { 1391 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1392 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1393 /* 1394 * [Optional] any of the following three actions: 1395 * o silently discard [X] 1396 * o trigger a path discovery [ ] 1397 * o inform TA that meshDA is unknown. [ ] 1398 */ 1399 /* XXX: stats */ 1400 return (-1); 1401 } 1402 1403 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1404 ms->ms_ppath->mpp_inact)); 1405 1406 /* set lifetime of addr4 (meshSA) to initial value */ 1407 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1408 KASSERT(rt_meshsa != NULL, ("no route")); 1409 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1410 ms->ms_ppath->mpp_inact)); 1411 1412 mesh_forward(vap, m, mc); 1413 return (1); /* dont process locally */ 1414 } 1415 1416 /* 1417 * Verifies transmitter, updates lifetime, precursor list and process data 1418 * locally, if data is proxy with AE = 10 it could mean data should go 1419 * on another mesh path or data should be forwarded to the DS. 1420 * 1421 * > 0 means we have forwarded data and no need to process locally 1422 * == 0 means we want to process locally (and we may have forwarded data 1423 * < 0 means there was an error and data should be discarded 1424 */ 1425 static int 1426 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1427 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1428 { 1429 struct ieee80211_qosframe_addr4 *qwh; 1430 const struct ieee80211_meshcntl_ae10 *mc10; 1431 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1432 struct ieee80211_mesh_route *rt; 1433 int ae; 1434 1435 /* This is called from the RX path - don't hold this lock */ 1436 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1437 1438 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1439 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1440 1441 /* 1442 * TODO: 1443 * o verify addr2 is a legitimate transmitter 1444 * o lifetime of precursor entry is max(init, curr) 1445 */ 1446 1447 /* set lifetime of addr4 (meshSA) to initial value */ 1448 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1449 KASSERT(rt != NULL, ("no route")); 1450 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1451 rt = NULL; 1452 1453 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1454 KASSERT(ae == IEEE80211_MESH_AE_00 || 1455 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1456 if (ae == IEEE80211_MESH_AE_10) { 1457 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1458 return (0); /* process locally */ 1459 } 1460 1461 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1462 if (rt != NULL && 1463 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1464 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1465 /* 1466 * Forward on another mesh-path, according to 1467 * amendment as specified in 9.32.4.1 1468 */ 1469 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1470 mesh_forward(vap, m, 1471 (const struct ieee80211_meshcntl *)mc10); 1472 return (1); /* dont process locally */ 1473 } 1474 /* 1475 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1476 * addressed according to 13.11.3.2. 1477 */ 1478 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1479 "forward frame to DS, SA(%6D) DA(%6D)", 1480 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1481 } 1482 return (0); /* process locally */ 1483 } 1484 1485 /* 1486 * Try to forward the group addressed data on to other mesh STAs, and 1487 * also to the DS. 1488 * 1489 * > 0 means we have forwarded data and no need to process locally 1490 * == 0 means we want to process locally (and we may have forwarded data 1491 * < 0 means there was an error and data should be discarded 1492 */ 1493 static int 1494 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1495 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1496 { 1497 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1498 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1499 1500 /* This is called from the RX path - don't hold this lock */ 1501 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1502 1503 mesh_forward(vap, m, mc); 1504 1505 if(mc->mc_ttl > 0) { 1506 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1507 /* 1508 * Forward of MSDUs from the MBSS to DS group addressed 1509 * (according to 13.11.3.2) 1510 * This happens by delivering the packet, and a bridge 1511 * will sent it on another port member. 1512 */ 1513 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1514 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) { 1515 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1516 MC01(mc)->mc_addr4, "%s", 1517 "forward from MBSS to the DS"); 1518 } 1519 } 1520 } 1521 return (0); /* process locally */ 1522 #undef MC01 1523 } 1524 1525 static int 1526 mesh_input(struct ieee80211_node *ni, struct mbuf *m, 1527 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1528 { 1529 #define HAS_SEQ(type) ((type & 0x4) == 0) 1530 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1531 struct ieee80211vap *vap = ni->ni_vap; 1532 struct ieee80211com *ic = ni->ni_ic; 1533 struct ifnet *ifp = vap->iv_ifp; 1534 struct ieee80211_frame *wh; 1535 const struct ieee80211_meshcntl *mc; 1536 int hdrspace, meshdrlen, need_tap, error; 1537 uint8_t dir, type, subtype, ae; 1538 uint32_t seq; 1539 const uint8_t *addr; 1540 uint8_t qos[2]; 1541 1542 KASSERT(ni != NULL, ("null node")); 1543 ni->ni_inact = ni->ni_inact_reload; 1544 1545 need_tap = 1; /* mbuf need to be tapped. */ 1546 type = -1; /* undefined */ 1547 1548 /* This is called from the RX path - don't hold this lock */ 1549 IEEE80211_TX_UNLOCK_ASSERT(ic); 1550 1551 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1552 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1553 ni->ni_macaddr, NULL, 1554 "too short (1): len %u", m->m_pkthdr.len); 1555 vap->iv_stats.is_rx_tooshort++; 1556 goto out; 1557 } 1558 /* 1559 * Bit of a cheat here, we use a pointer for a 3-address 1560 * frame format but don't reference fields past outside 1561 * ieee80211_frame_min w/o first validating the data is 1562 * present. 1563 */ 1564 wh = mtod(m, struct ieee80211_frame *); 1565 1566 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1567 IEEE80211_FC0_VERSION_0) { 1568 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1569 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1570 vap->iv_stats.is_rx_badversion++; 1571 goto err; 1572 } 1573 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1574 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1575 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1576 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1577 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1578 ni->ni_noise = nf; 1579 if (HAS_SEQ(type)) { 1580 uint8_t tid = ieee80211_gettid(wh); 1581 1582 if (IEEE80211_QOS_HAS_SEQ(wh) && 1583 TID_TO_WME_AC(tid) >= WME_AC_VI) 1584 ic->ic_wme.wme_hipri_traffic++; 1585 if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs)) 1586 goto out; 1587 } 1588 } 1589 #ifdef IEEE80211_DEBUG 1590 /* 1591 * It's easier, but too expensive, to simulate different mesh 1592 * topologies by consulting the ACL policy very early, so do this 1593 * only under DEBUG. 1594 * 1595 * NB: this check is also done upon peering link initiation. 1596 */ 1597 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1598 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1599 wh, NULL, "%s", "disallowed by ACL"); 1600 vap->iv_stats.is_rx_acl++; 1601 goto out; 1602 } 1603 #endif 1604 switch (type) { 1605 case IEEE80211_FC0_TYPE_DATA: 1606 if (ni == vap->iv_bss) 1607 goto out; 1608 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1609 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1610 ni->ni_macaddr, NULL, 1611 "peer link not yet established (%d)", 1612 ni->ni_mlstate); 1613 vap->iv_stats.is_mesh_nolink++; 1614 goto out; 1615 } 1616 if (dir != IEEE80211_FC1_DIR_FROMDS && 1617 dir != IEEE80211_FC1_DIR_DSTODS) { 1618 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1619 wh, "data", "incorrect dir 0x%x", dir); 1620 vap->iv_stats.is_rx_wrongdir++; 1621 goto err; 1622 } 1623 1624 /* All Mesh data frames are QoS subtype */ 1625 if (!HAS_SEQ(type)) { 1626 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1627 wh, "data", "incorrect subtype 0x%x", subtype); 1628 vap->iv_stats.is_rx_badsubtype++; 1629 goto err; 1630 } 1631 1632 /* 1633 * Next up, any fragmentation. 1634 * XXX: we defrag before we even try to forward, 1635 * Mesh Control field is not present in sub-sequent 1636 * fragmented frames. This is in contrast to Draft 4.0. 1637 */ 1638 hdrspace = ieee80211_hdrspace(ic, wh); 1639 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1640 m = ieee80211_defrag(ni, m, hdrspace, 0); 1641 if (m == NULL) { 1642 /* Fragment dropped or frame not complete yet */ 1643 goto out; 1644 } 1645 } 1646 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1647 1648 /* 1649 * Now we have a complete Mesh Data frame. 1650 */ 1651 1652 /* 1653 * Only fromDStoDS data frames use 4 address qos frames 1654 * as specified in amendment. Otherwise addr4 is located 1655 * in the Mesh Control field and a 3 address qos frame 1656 * is used. 1657 */ 1658 *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh); 1659 1660 /* 1661 * NB: The mesh STA sets the Mesh Control Present 1662 * subfield to 1 in the Mesh Data frame containing 1663 * an unfragmented MSDU, an A-MSDU, or the first 1664 * fragment of an MSDU. 1665 * After defrag it should always be present. 1666 */ 1667 if (!(qos[1] & IEEE80211_QOS_MC)) { 1668 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1669 ni->ni_macaddr, NULL, 1670 "%s", "Mesh control field not present"); 1671 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1672 goto err; 1673 } 1674 1675 /* pull up enough to get to the mesh control */ 1676 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1677 (m = m_pullup(m, hdrspace + 1678 sizeof(struct ieee80211_meshcntl))) == NULL) { 1679 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1680 ni->ni_macaddr, NULL, 1681 "data too short: expecting %u", hdrspace); 1682 vap->iv_stats.is_rx_tooshort++; 1683 goto out; /* XXX */ 1684 } 1685 /* 1686 * Now calculate the full extent of the headers. Note 1687 * mesh_decap will pull up anything we didn't get 1688 * above when it strips the 802.11 headers. 1689 */ 1690 mc = (const struct ieee80211_meshcntl *) 1691 (mtod(m, const uint8_t *) + hdrspace); 1692 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1693 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1694 ae * IEEE80211_ADDR_LEN; 1695 hdrspace += meshdrlen; 1696 1697 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1698 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1699 (m->m_len < hdrspace) && 1700 ((m = m_pullup(m, hdrspace)) == NULL)) { 1701 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1702 ni->ni_macaddr, NULL, 1703 "data too short: expecting %u", hdrspace); 1704 vap->iv_stats.is_rx_tooshort++; 1705 goto out; /* XXX */ 1706 } 1707 /* XXX: are we sure there is no reallocating after m_pullup? */ 1708 1709 seq = le32dec(mc->mc_seq); 1710 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1711 addr = wh->i_addr3; 1712 else if (ae == IEEE80211_MESH_AE_01) 1713 addr = MC01(mc)->mc_addr4; 1714 else 1715 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1716 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1717 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1718 addr, "data", "%s", "not to me"); 1719 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1720 goto out; 1721 } 1722 if (mesh_checkpseq(vap, addr, seq) != 0) { 1723 vap->iv_stats.is_rx_dup++; 1724 goto out; 1725 } 1726 1727 /* This code "routes" the frame to the right control path */ 1728 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1729 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1730 error = 1731 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1732 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1733 error = mesh_recv_group_data(vap, m, wh, mc); 1734 else 1735 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1736 wh, mc); 1737 } else 1738 error = mesh_recv_group_data(vap, m, wh, mc); 1739 if (error < 0) 1740 goto err; 1741 else if (error > 0) 1742 goto out; 1743 1744 if (ieee80211_radiotap_active_vap(vap)) 1745 ieee80211_radiotap_rx(vap, m); 1746 need_tap = 0; 1747 1748 /* 1749 * Finally, strip the 802.11 header. 1750 */ 1751 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1752 if (m == NULL) { 1753 /* XXX mask bit to check for both */ 1754 /* don't count Null data frames as errors */ 1755 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1756 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1757 goto out; 1758 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1759 ni->ni_macaddr, "data", "%s", "decap error"); 1760 vap->iv_stats.is_rx_decap++; 1761 IEEE80211_NODE_STAT(ni, rx_decap); 1762 goto err; 1763 } 1764 if (qos[0] & IEEE80211_QOS_AMSDU) { 1765 m = ieee80211_decap_amsdu(ni, m); 1766 if (m == NULL) 1767 return IEEE80211_FC0_TYPE_DATA; 1768 } 1769 ieee80211_deliver_data(vap, ni, m); 1770 return type; 1771 case IEEE80211_FC0_TYPE_MGT: 1772 vap->iv_stats.is_rx_mgmt++; 1773 IEEE80211_NODE_STAT(ni, rx_mgmt); 1774 if (dir != IEEE80211_FC1_DIR_NODS) { 1775 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1776 wh, "mgt", "incorrect dir 0x%x", dir); 1777 vap->iv_stats.is_rx_wrongdir++; 1778 goto err; 1779 } 1780 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1781 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1782 ni->ni_macaddr, "mgt", "too short: len %u", 1783 m->m_pkthdr.len); 1784 vap->iv_stats.is_rx_tooshort++; 1785 goto out; 1786 } 1787 #ifdef IEEE80211_DEBUG 1788 if ((ieee80211_msg_debug(vap) && 1789 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1790 ieee80211_msg_dumppkts(vap)) { 1791 if_printf(ifp, "received %s from %s rssi %d\n", 1792 ieee80211_mgt_subtype_name(subtype), 1793 ether_sprintf(wh->i_addr2), rssi); 1794 } 1795 #endif 1796 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1797 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1798 wh, NULL, "%s", "WEP set but not permitted"); 1799 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1800 goto out; 1801 } 1802 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 1803 goto out; 1804 case IEEE80211_FC0_TYPE_CTL: 1805 vap->iv_stats.is_rx_ctl++; 1806 IEEE80211_NODE_STAT(ni, rx_ctrl); 1807 goto out; 1808 default: 1809 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1810 wh, "bad", "frame type 0x%x", type); 1811 /* should not come here */ 1812 break; 1813 } 1814 err: 1815 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1816 out: 1817 if (m != NULL) { 1818 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1819 ieee80211_radiotap_rx(vap, m); 1820 m_freem(m); 1821 } 1822 return type; 1823 #undef HAS_SEQ 1824 #undef MC01 1825 } 1826 1827 static void 1828 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1829 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1830 { 1831 struct ieee80211vap *vap = ni->ni_vap; 1832 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1833 struct ieee80211com *ic = ni->ni_ic; 1834 struct ieee80211_channel *rxchan = ic->ic_curchan; 1835 struct ieee80211_frame *wh; 1836 struct ieee80211_mesh_route *rt; 1837 uint8_t *frm, *efrm; 1838 1839 wh = mtod(m0, struct ieee80211_frame *); 1840 frm = (uint8_t *)&wh[1]; 1841 efrm = mtod(m0, uint8_t *) + m0->m_len; 1842 switch (subtype) { 1843 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1844 case IEEE80211_FC0_SUBTYPE_BEACON: 1845 { 1846 struct ieee80211_scanparams scan; 1847 struct ieee80211_channel *c; 1848 /* 1849 * We process beacon/probe response 1850 * frames to discover neighbors. 1851 */ 1852 if (rxs != NULL) { 1853 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1854 if (c != NULL) 1855 rxchan = c; 1856 } 1857 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) 1858 return; 1859 /* 1860 * Count frame now that we know it's to be processed. 1861 */ 1862 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1863 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1864 IEEE80211_NODE_STAT(ni, rx_beacons); 1865 } else 1866 IEEE80211_NODE_STAT(ni, rx_proberesp); 1867 /* 1868 * If scanning, just pass information to the scan module. 1869 */ 1870 if (ic->ic_flags & IEEE80211_F_SCAN) { 1871 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1872 /* 1873 * Actively scanning a channel marked passive; 1874 * send a probe request now that we know there 1875 * is 802.11 traffic present. 1876 * 1877 * XXX check if the beacon we recv'd gives 1878 * us what we need and suppress the probe req 1879 */ 1880 ieee80211_probe_curchan(vap, 1); 1881 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1882 } 1883 ieee80211_add_scan(vap, rxchan, &scan, wh, 1884 subtype, rssi, nf); 1885 return; 1886 } 1887 1888 /* The rest of this code assumes we are running */ 1889 if (vap->iv_state != IEEE80211_S_RUN) 1890 return; 1891 /* 1892 * Ignore non-mesh STAs. 1893 */ 1894 if ((scan.capinfo & 1895 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1896 scan.meshid == NULL || scan.meshconf == NULL) { 1897 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1898 wh, "beacon", "%s", "not a mesh sta"); 1899 vap->iv_stats.is_mesh_wrongmesh++; 1900 return; 1901 } 1902 /* 1903 * Ignore STAs for other mesh networks. 1904 */ 1905 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1906 mesh_verify_meshconf(vap, scan.meshconf)) { 1907 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1908 wh, "beacon", "%s", "not for our mesh"); 1909 vap->iv_stats.is_mesh_wrongmesh++; 1910 return; 1911 } 1912 /* 1913 * Peer only based on the current ACL policy. 1914 */ 1915 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1916 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1917 wh, NULL, "%s", "disallowed by ACL"); 1918 vap->iv_stats.is_rx_acl++; 1919 return; 1920 } 1921 /* 1922 * Do neighbor discovery. 1923 */ 1924 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1925 /* 1926 * Create a new entry in the neighbor table. 1927 */ 1928 ni = ieee80211_add_neighbor(vap, wh, &scan); 1929 } 1930 /* 1931 * Automatically peer with discovered nodes if possible. 1932 */ 1933 if (ni != vap->iv_bss && 1934 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1935 switch (ni->ni_mlstate) { 1936 case IEEE80211_NODE_MESH_IDLE: 1937 { 1938 uint16_t args[1]; 1939 1940 /* Wait for backoff callout to reset counter */ 1941 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1942 return; 1943 1944 ni->ni_mlpid = mesh_generateid(vap); 1945 if (ni->ni_mlpid == 0) 1946 return; 1947 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1948 args[0] = ni->ni_mlpid; 1949 ieee80211_send_action(ni, 1950 IEEE80211_ACTION_CAT_SELF_PROT, 1951 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1952 ni->ni_mlrcnt = 0; 1953 mesh_peer_timeout_setup(ni); 1954 break; 1955 } 1956 case IEEE80211_NODE_MESH_ESTABLISHED: 1957 { 1958 /* 1959 * Valid beacon from a peer mesh STA 1960 * bump TA lifetime 1961 */ 1962 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1963 if(rt != NULL) { 1964 ieee80211_mesh_rt_update(rt, 1965 ticks_to_msecs( 1966 ms->ms_ppath->mpp_inact)); 1967 } 1968 break; 1969 } 1970 default: 1971 break; /* ignore */ 1972 } 1973 } 1974 break; 1975 } 1976 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1977 { 1978 uint8_t *ssid, *meshid, *rates, *xrates; 1979 1980 if (vap->iv_state != IEEE80211_S_RUN) { 1981 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1982 wh, NULL, "wrong state %s", 1983 ieee80211_state_name[vap->iv_state]); 1984 vap->iv_stats.is_rx_mgtdiscard++; 1985 return; 1986 } 1987 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1988 /* frame must be directed */ 1989 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1990 wh, NULL, "%s", "not unicast"); 1991 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1992 return; 1993 } 1994 /* 1995 * prreq frame format 1996 * [tlv] ssid 1997 * [tlv] supported rates 1998 * [tlv] extended supported rates 1999 * [tlv] mesh id 2000 */ 2001 ssid = meshid = rates = xrates = NULL; 2002 while (efrm - frm > 1) { 2003 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2004 switch (*frm) { 2005 case IEEE80211_ELEMID_SSID: 2006 ssid = frm; 2007 break; 2008 case IEEE80211_ELEMID_RATES: 2009 rates = frm; 2010 break; 2011 case IEEE80211_ELEMID_XRATES: 2012 xrates = frm; 2013 break; 2014 case IEEE80211_ELEMID_MESHID: 2015 meshid = frm; 2016 break; 2017 } 2018 frm += frm[1] + 2; 2019 } 2020 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2021 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2022 if (xrates != NULL) 2023 IEEE80211_VERIFY_ELEMENT(xrates, 2024 IEEE80211_RATE_MAXSIZE - rates[1], return); 2025 if (meshid != NULL) { 2026 IEEE80211_VERIFY_ELEMENT(meshid, 2027 IEEE80211_MESHID_LEN, return); 2028 /* NB: meshid, not ssid */ 2029 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2030 } 2031 2032 /* XXX find a better class or define it's own */ 2033 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2034 "%s", "recv probe req"); 2035 /* 2036 * Some legacy 11b clients cannot hack a complete 2037 * probe response frame. When the request includes 2038 * only a bare-bones rate set, communicate this to 2039 * the transmit side. 2040 */ 2041 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2042 break; 2043 } 2044 2045 case IEEE80211_FC0_SUBTYPE_ACTION: 2046 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2047 if (ni == vap->iv_bss) { 2048 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2049 wh, NULL, "%s", "unknown node"); 2050 vap->iv_stats.is_rx_mgtdiscard++; 2051 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2052 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2053 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2054 wh, NULL, "%s", "not for us"); 2055 vap->iv_stats.is_rx_mgtdiscard++; 2056 } else if (vap->iv_state != IEEE80211_S_RUN) { 2057 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2058 wh, NULL, "wrong state %s", 2059 ieee80211_state_name[vap->iv_state]); 2060 vap->iv_stats.is_rx_mgtdiscard++; 2061 } else { 2062 if (ieee80211_parse_action(ni, m0) == 0) 2063 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2064 } 2065 break; 2066 2067 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2068 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2069 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2070 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2071 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 2072 case IEEE80211_FC0_SUBTYPE_ATIM: 2073 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2074 case IEEE80211_FC0_SUBTYPE_AUTH: 2075 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2076 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2077 wh, NULL, "%s", "not handled"); 2078 vap->iv_stats.is_rx_mgtdiscard++; 2079 break; 2080 2081 default: 2082 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2083 wh, "mgt", "subtype 0x%x not handled", subtype); 2084 vap->iv_stats.is_rx_badsubtype++; 2085 break; 2086 } 2087 } 2088 2089 static void 2090 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2091 { 2092 2093 switch (subtype) { 2094 case IEEE80211_FC0_SUBTYPE_BAR: 2095 ieee80211_recv_bar(ni, m); 2096 break; 2097 } 2098 } 2099 2100 /* 2101 * Parse meshpeering action ie's for MPM frames 2102 */ 2103 static const struct ieee80211_meshpeer_ie * 2104 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2105 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2106 const uint8_t *frm, const uint8_t *efrm, 2107 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2108 { 2109 struct ieee80211vap *vap = ni->ni_vap; 2110 const struct ieee80211_meshpeer_ie *mpie; 2111 uint16_t args[3]; 2112 const uint8_t *meshid, *meshconf; 2113 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2114 2115 meshid = meshconf = NULL; 2116 while (efrm - frm > 1) { 2117 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2118 switch (*frm) { 2119 case IEEE80211_ELEMID_MESHID: 2120 meshid = frm; 2121 break; 2122 case IEEE80211_ELEMID_MESHCONF: 2123 meshconf = frm; 2124 break; 2125 case IEEE80211_ELEMID_MESHPEER: 2126 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2127 memset(mp, 0, sizeof(*mp)); 2128 mp->peer_len = mpie->peer_len; 2129 mp->peer_proto = le16dec(&mpie->peer_proto); 2130 mp->peer_llinkid = le16dec(&mpie->peer_llinkid); 2131 switch (subtype) { 2132 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2133 mp->peer_linkid = 2134 le16dec(&mpie->peer_linkid); 2135 break; 2136 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2137 /* NB: peer link ID is optional */ 2138 if (mpie->peer_len == 2139 (IEEE80211_MPM_BASE_SZ + 2)) { 2140 mp->peer_linkid = 0; 2141 mp->peer_rcode = 2142 le16dec(&mpie->peer_linkid); 2143 } else { 2144 mp->peer_linkid = 2145 le16dec(&mpie->peer_linkid); 2146 mp->peer_rcode = 2147 le16dec(&mpie->peer_rcode); 2148 } 2149 break; 2150 } 2151 break; 2152 } 2153 frm += frm[1] + 2; 2154 } 2155 2156 /* 2157 * Verify the contents of the frame. 2158 * If it fails validation, close the peer link. 2159 */ 2160 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2161 sendclose = 1; 2162 IEEE80211_DISCARD(vap, 2163 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2164 wh, NULL, "%s", "MPM validation failed"); 2165 } 2166 2167 /* If meshid is not the same reject any frames type. */ 2168 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2169 sendclose = 1; 2170 IEEE80211_DISCARD(vap, 2171 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2172 wh, NULL, "%s", "not for our mesh"); 2173 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2174 /* 2175 * Standard not clear about this, if we dont ignore 2176 * there will be an endless loop between nodes sending 2177 * CLOSE frames between each other with wrong meshid. 2178 * Discard and timers will bring FSM to IDLE state. 2179 */ 2180 return NULL; 2181 } 2182 } 2183 2184 /* 2185 * Close frames are accepted if meshid is the same. 2186 * Verify the other two types. 2187 */ 2188 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2189 mesh_verify_meshconf(vap, meshconf)) { 2190 sendclose = 1; 2191 IEEE80211_DISCARD(vap, 2192 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2193 wh, NULL, "%s", "configuration mismatch"); 2194 } 2195 2196 if (sendclose) { 2197 vap->iv_stats.is_rx_mgtdiscard++; 2198 switch (ni->ni_mlstate) { 2199 case IEEE80211_NODE_MESH_IDLE: 2200 case IEEE80211_NODE_MESH_ESTABLISHED: 2201 case IEEE80211_NODE_MESH_HOLDING: 2202 /* ignore */ 2203 break; 2204 case IEEE80211_NODE_MESH_OPENSNT: 2205 case IEEE80211_NODE_MESH_OPENRCV: 2206 case IEEE80211_NODE_MESH_CONFIRMRCV: 2207 args[0] = ni->ni_mlpid; 2208 args[1] = ni->ni_mllid; 2209 /* Reason codes for rejection */ 2210 switch (subtype) { 2211 case IEEE80211_ACTION_MESHPEERING_OPEN: 2212 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2213 break; 2214 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2215 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2216 break; 2217 } 2218 ieee80211_send_action(ni, 2219 IEEE80211_ACTION_CAT_SELF_PROT, 2220 IEEE80211_ACTION_MESHPEERING_CLOSE, 2221 args); 2222 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2223 mesh_peer_timeout_setup(ni); 2224 break; 2225 } 2226 return NULL; 2227 } 2228 2229 return (const struct ieee80211_meshpeer_ie *) mp; 2230 } 2231 2232 static int 2233 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2234 const struct ieee80211_frame *wh, 2235 const uint8_t *frm, const uint8_t *efrm) 2236 { 2237 struct ieee80211vap *vap = ni->ni_vap; 2238 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2239 struct ieee80211_meshpeer_ie ie; 2240 const struct ieee80211_meshpeer_ie *meshpeer; 2241 uint16_t args[3]; 2242 2243 /* +2+2 for action + code + capabilites */ 2244 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2245 IEEE80211_ACTION_MESHPEERING_OPEN); 2246 if (meshpeer == NULL) { 2247 return 0; 2248 } 2249 2250 /* XXX move up */ 2251 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2252 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2253 2254 switch (ni->ni_mlstate) { 2255 case IEEE80211_NODE_MESH_IDLE: 2256 /* Reject open request if reached our maximum neighbor count */ 2257 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2258 args[0] = meshpeer->peer_llinkid; 2259 args[1] = 0; 2260 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2261 ieee80211_send_action(ni, 2262 IEEE80211_ACTION_CAT_SELF_PROT, 2263 IEEE80211_ACTION_MESHPEERING_CLOSE, 2264 args); 2265 /* stay in IDLE state */ 2266 return (0); 2267 } 2268 /* Open frame accepted */ 2269 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2270 ni->ni_mllid = meshpeer->peer_llinkid; 2271 ni->ni_mlpid = mesh_generateid(vap); 2272 if (ni->ni_mlpid == 0) 2273 return 0; /* XXX */ 2274 args[0] = ni->ni_mlpid; 2275 /* Announce we're open too... */ 2276 ieee80211_send_action(ni, 2277 IEEE80211_ACTION_CAT_SELF_PROT, 2278 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2279 /* ...and confirm the link. */ 2280 args[0] = ni->ni_mlpid; 2281 args[1] = ni->ni_mllid; 2282 ieee80211_send_action(ni, 2283 IEEE80211_ACTION_CAT_SELF_PROT, 2284 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2285 args); 2286 mesh_peer_timeout_setup(ni); 2287 break; 2288 case IEEE80211_NODE_MESH_OPENRCV: 2289 /* Wrong Link ID */ 2290 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2291 args[0] = ni->ni_mllid; 2292 args[1] = ni->ni_mlpid; 2293 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2294 ieee80211_send_action(ni, 2295 IEEE80211_ACTION_CAT_SELF_PROT, 2296 IEEE80211_ACTION_MESHPEERING_CLOSE, 2297 args); 2298 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2299 mesh_peer_timeout_setup(ni); 2300 break; 2301 } 2302 /* Duplicate open, confirm again. */ 2303 args[0] = ni->ni_mlpid; 2304 args[1] = ni->ni_mllid; 2305 ieee80211_send_action(ni, 2306 IEEE80211_ACTION_CAT_SELF_PROT, 2307 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2308 args); 2309 break; 2310 case IEEE80211_NODE_MESH_OPENSNT: 2311 ni->ni_mllid = meshpeer->peer_llinkid; 2312 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2313 args[0] = ni->ni_mlpid; 2314 args[1] = ni->ni_mllid; 2315 ieee80211_send_action(ni, 2316 IEEE80211_ACTION_CAT_SELF_PROT, 2317 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2318 args); 2319 /* NB: don't setup/clear any timeout */ 2320 break; 2321 case IEEE80211_NODE_MESH_CONFIRMRCV: 2322 if (ni->ni_mlpid != meshpeer->peer_linkid || 2323 ni->ni_mllid != meshpeer->peer_llinkid) { 2324 args[0] = ni->ni_mlpid; 2325 args[1] = ni->ni_mllid; 2326 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2327 ieee80211_send_action(ni, 2328 IEEE80211_ACTION_CAT_SELF_PROT, 2329 IEEE80211_ACTION_MESHPEERING_CLOSE, 2330 args); 2331 mesh_linkchange(ni, 2332 IEEE80211_NODE_MESH_HOLDING); 2333 mesh_peer_timeout_setup(ni); 2334 break; 2335 } 2336 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2337 ni->ni_mllid = meshpeer->peer_llinkid; 2338 args[0] = ni->ni_mlpid; 2339 args[1] = ni->ni_mllid; 2340 ieee80211_send_action(ni, 2341 IEEE80211_ACTION_CAT_SELF_PROT, 2342 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2343 args); 2344 mesh_peer_timeout_stop(ni); 2345 break; 2346 case IEEE80211_NODE_MESH_ESTABLISHED: 2347 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2348 args[0] = ni->ni_mllid; 2349 args[1] = ni->ni_mlpid; 2350 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2351 ieee80211_send_action(ni, 2352 IEEE80211_ACTION_CAT_SELF_PROT, 2353 IEEE80211_ACTION_MESHPEERING_CLOSE, 2354 args); 2355 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2356 mesh_peer_timeout_setup(ni); 2357 break; 2358 } 2359 args[0] = ni->ni_mlpid; 2360 args[1] = ni->ni_mllid; 2361 ieee80211_send_action(ni, 2362 IEEE80211_ACTION_CAT_SELF_PROT, 2363 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2364 args); 2365 break; 2366 case IEEE80211_NODE_MESH_HOLDING: 2367 args[0] = ni->ni_mlpid; 2368 args[1] = meshpeer->peer_llinkid; 2369 /* Standard not clear about what the reaason code should be */ 2370 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2371 ieee80211_send_action(ni, 2372 IEEE80211_ACTION_CAT_SELF_PROT, 2373 IEEE80211_ACTION_MESHPEERING_CLOSE, 2374 args); 2375 break; 2376 } 2377 return 0; 2378 } 2379 2380 static int 2381 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2382 const struct ieee80211_frame *wh, 2383 const uint8_t *frm, const uint8_t *efrm) 2384 { 2385 struct ieee80211vap *vap = ni->ni_vap; 2386 struct ieee80211_meshpeer_ie ie; 2387 const struct ieee80211_meshpeer_ie *meshpeer; 2388 uint16_t args[3]; 2389 2390 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2391 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2392 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2393 if (meshpeer == NULL) { 2394 return 0; 2395 } 2396 2397 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2398 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2399 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2400 2401 switch (ni->ni_mlstate) { 2402 case IEEE80211_NODE_MESH_OPENRCV: 2403 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2404 mesh_peer_timeout_stop(ni); 2405 break; 2406 case IEEE80211_NODE_MESH_OPENSNT: 2407 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2408 mesh_peer_timeout_setup(ni); 2409 break; 2410 case IEEE80211_NODE_MESH_HOLDING: 2411 args[0] = ni->ni_mlpid; 2412 args[1] = meshpeer->peer_llinkid; 2413 /* Standard not clear about what the reaason code should be */ 2414 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2415 ieee80211_send_action(ni, 2416 IEEE80211_ACTION_CAT_SELF_PROT, 2417 IEEE80211_ACTION_MESHPEERING_CLOSE, 2418 args); 2419 break; 2420 case IEEE80211_NODE_MESH_CONFIRMRCV: 2421 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2422 args[0] = ni->ni_mlpid; 2423 args[1] = ni->ni_mllid; 2424 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2425 ieee80211_send_action(ni, 2426 IEEE80211_ACTION_CAT_SELF_PROT, 2427 IEEE80211_ACTION_MESHPEERING_CLOSE, 2428 args); 2429 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2430 mesh_peer_timeout_setup(ni); 2431 } 2432 break; 2433 default: 2434 IEEE80211_DISCARD(vap, 2435 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2436 wh, NULL, "received confirm in invalid state %d", 2437 ni->ni_mlstate); 2438 vap->iv_stats.is_rx_mgtdiscard++; 2439 break; 2440 } 2441 return 0; 2442 } 2443 2444 static int 2445 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2446 const struct ieee80211_frame *wh, 2447 const uint8_t *frm, const uint8_t *efrm) 2448 { 2449 struct ieee80211_meshpeer_ie ie; 2450 const struct ieee80211_meshpeer_ie *meshpeer; 2451 uint16_t args[3]; 2452 2453 /* +2 for action + code */ 2454 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2455 IEEE80211_ACTION_MESHPEERING_CLOSE); 2456 if (meshpeer == NULL) { 2457 return 0; 2458 } 2459 2460 /* 2461 * XXX: check reason code, for example we could receive 2462 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2463 * to peer again. 2464 */ 2465 2466 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2467 ni, "%s", "recv PEER CLOSE"); 2468 2469 switch (ni->ni_mlstate) { 2470 case IEEE80211_NODE_MESH_IDLE: 2471 /* ignore */ 2472 break; 2473 case IEEE80211_NODE_MESH_OPENRCV: 2474 case IEEE80211_NODE_MESH_OPENSNT: 2475 case IEEE80211_NODE_MESH_CONFIRMRCV: 2476 case IEEE80211_NODE_MESH_ESTABLISHED: 2477 args[0] = ni->ni_mlpid; 2478 args[1] = ni->ni_mllid; 2479 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2480 ieee80211_send_action(ni, 2481 IEEE80211_ACTION_CAT_SELF_PROT, 2482 IEEE80211_ACTION_MESHPEERING_CLOSE, 2483 args); 2484 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2485 mesh_peer_timeout_setup(ni); 2486 break; 2487 case IEEE80211_NODE_MESH_HOLDING: 2488 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2489 mesh_peer_timeout_stop(ni); 2490 break; 2491 } 2492 return 0; 2493 } 2494 2495 /* 2496 * Link Metric handling. 2497 */ 2498 static int 2499 mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2500 const struct ieee80211_frame *wh, 2501 const uint8_t *frm, const uint8_t *efrm) 2502 { 2503 const struct ieee80211_meshlmetric_ie *ie = 2504 (const struct ieee80211_meshlmetric_ie *) 2505 (frm+2); /* action + code */ 2506 struct ieee80211_meshlmetric_ie lm_rep; 2507 2508 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2509 lm_rep.lm_flags = 0; 2510 lm_rep.lm_metric = mesh_airtime_calc(ni); 2511 ieee80211_send_action(ni, 2512 IEEE80211_ACTION_CAT_MESH, 2513 IEEE80211_ACTION_MESH_LMETRIC, 2514 &lm_rep); 2515 } 2516 /* XXX: else do nothing for now */ 2517 return 0; 2518 } 2519 2520 /* 2521 * Parse meshgate action ie's for GANN frames. 2522 * Returns -1 if parsing fails, otherwise 0. 2523 */ 2524 static int 2525 mesh_parse_meshgate_action(struct ieee80211_node *ni, 2526 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2527 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2528 { 2529 struct ieee80211vap *vap = ni->ni_vap; 2530 const struct ieee80211_meshgann_ie *gannie; 2531 2532 while (efrm - frm > 1) { 2533 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2534 switch (*frm) { 2535 case IEEE80211_ELEMID_MESHGANN: 2536 gannie = (const struct ieee80211_meshgann_ie *) frm; 2537 memset(ie, 0, sizeof(*ie)); 2538 ie->gann_ie = gannie->gann_ie; 2539 ie->gann_len = gannie->gann_len; 2540 ie->gann_flags = gannie->gann_flags; 2541 ie->gann_hopcount = gannie->gann_hopcount; 2542 ie->gann_ttl = gannie->gann_ttl; 2543 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2544 ie->gann_seq = le32dec(&gannie->gann_seq); 2545 ie->gann_interval = le16dec(&gannie->gann_interval); 2546 break; 2547 } 2548 frm += frm[1] + 2; 2549 } 2550 2551 return 0; 2552 } 2553 2554 /* 2555 * Mesh Gate Announcement handling. 2556 */ 2557 static int 2558 mesh_recv_action_meshgate(struct ieee80211_node *ni, 2559 const struct ieee80211_frame *wh, 2560 const uint8_t *frm, const uint8_t *efrm) 2561 { 2562 struct ieee80211vap *vap = ni->ni_vap; 2563 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2564 struct ieee80211_mesh_gate_route *gr, *next; 2565 struct ieee80211_mesh_route *rt_gate; 2566 struct ieee80211_meshgann_ie pgann; 2567 struct ieee80211_meshgann_ie ie; 2568 int found = 0; 2569 2570 /* +2 for action + code */ 2571 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2572 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2573 ni->ni_macaddr, NULL, "%s", 2574 "GANN parsing failed"); 2575 vap->iv_stats.is_rx_mgtdiscard++; 2576 return (0); 2577 } 2578 2579 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2580 return 0; 2581 2582 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2583 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2584 ie.gann_seq); 2585 2586 if (ms == NULL) 2587 return (0); 2588 MESH_RT_LOCK(ms); 2589 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2590 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2591 continue; 2592 if (ie.gann_seq <= gr->gr_lastseq) { 2593 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2594 ni->ni_macaddr, NULL, 2595 "GANN old seqno %u <= %u", 2596 ie.gann_seq, gr->gr_lastseq); 2597 MESH_RT_UNLOCK(ms); 2598 return (0); 2599 } 2600 /* corresponding mesh gate found & GANN accepted */ 2601 found = 1; 2602 break; 2603 2604 } 2605 if (found == 0) { 2606 /* this GANN is from a new mesh Gate add it to known table. */ 2607 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2608 "stored new GANN information, seq %u.", ie.gann_seq); 2609 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2610 M_80211_MESH_GT_RT, 2611 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2612 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2613 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2614 } 2615 gr->gr_lastseq = ie.gann_seq; 2616 2617 /* check if we have a path to this gate */ 2618 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2619 if (rt_gate != NULL && 2620 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2621 gr->gr_route = rt_gate; 2622 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2623 } 2624 2625 MESH_RT_UNLOCK(ms); 2626 2627 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2628 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2629 return 0; 2630 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2631 pgann.gann_hopcount = ie.gann_hopcount + 1; 2632 pgann.gann_ttl = ie.gann_ttl - 1; 2633 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2634 pgann.gann_seq = ie.gann_seq; 2635 pgann.gann_interval = ie.gann_interval; 2636 2637 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2638 "%s", "propagate GANN"); 2639 2640 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2641 IEEE80211_ACTION_MESH_GANN, &pgann); 2642 2643 return 0; 2644 } 2645 2646 static int 2647 mesh_send_action(struct ieee80211_node *ni, 2648 const uint8_t sa[IEEE80211_ADDR_LEN], 2649 const uint8_t da[IEEE80211_ADDR_LEN], 2650 struct mbuf *m) 2651 { 2652 struct ieee80211vap *vap = ni->ni_vap; 2653 struct ieee80211com *ic = ni->ni_ic; 2654 struct ieee80211_bpf_params params; 2655 int ret; 2656 2657 KASSERT(ni != NULL, ("null node")); 2658 2659 if (vap->iv_state == IEEE80211_S_CAC) { 2660 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2661 "block %s frame in CAC state", "Mesh action"); 2662 vap->iv_stats.is_tx_badstate++; 2663 ieee80211_free_node(ni); 2664 m_freem(m); 2665 return EIO; /* XXX */ 2666 } 2667 2668 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2669 if (m == NULL) { 2670 ieee80211_free_node(ni); 2671 return ENOMEM; 2672 } 2673 2674 IEEE80211_TX_LOCK(ic); 2675 ieee80211_send_setup(ni, m, 2676 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2677 IEEE80211_NONQOS_TID, sa, da, sa); 2678 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2679 2680 memset(¶ms, 0, sizeof(params)); 2681 params.ibp_pri = WME_AC_VO; 2682 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2683 if (IEEE80211_IS_MULTICAST(da)) 2684 params.ibp_try0 = 1; 2685 else 2686 params.ibp_try0 = ni->ni_txparms->maxretry; 2687 params.ibp_power = ni->ni_txpower; 2688 2689 IEEE80211_NODE_STAT(ni, tx_mgmt); 2690 2691 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2692 IEEE80211_TX_UNLOCK(ic); 2693 return (ret); 2694 } 2695 2696 #define ADDSHORT(frm, v) do { \ 2697 frm[0] = (v) & 0xff; \ 2698 frm[1] = (v) >> 8; \ 2699 frm += 2; \ 2700 } while (0) 2701 #define ADDWORD(frm, v) do { \ 2702 frm[0] = (v) & 0xff; \ 2703 frm[1] = ((v) >> 8) & 0xff; \ 2704 frm[2] = ((v) >> 16) & 0xff; \ 2705 frm[3] = ((v) >> 24) & 0xff; \ 2706 frm += 4; \ 2707 } while (0) 2708 2709 static int 2710 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2711 int category, int action, void *args0) 2712 { 2713 struct ieee80211vap *vap = ni->ni_vap; 2714 struct ieee80211com *ic = ni->ni_ic; 2715 uint16_t *args = args0; 2716 const struct ieee80211_rateset *rs; 2717 struct mbuf *m; 2718 uint8_t *frm; 2719 2720 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2721 "send PEER OPEN action: localid 0x%x", args[0]); 2722 2723 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2724 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2725 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2726 ieee80211_ref_node(ni); 2727 2728 m = ieee80211_getmgtframe(&frm, 2729 ic->ic_headroom + sizeof(struct ieee80211_frame), 2730 sizeof(uint16_t) /* action+category */ 2731 + sizeof(uint16_t) /* capabilites */ 2732 + 2 + IEEE80211_RATE_SIZE 2733 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2734 + 2 + IEEE80211_MESHID_LEN 2735 + sizeof(struct ieee80211_meshconf_ie) 2736 + sizeof(struct ieee80211_meshpeer_ie) 2737 ); 2738 if (m != NULL) { 2739 /* 2740 * mesh peer open action frame format: 2741 * [1] category 2742 * [1] action 2743 * [2] capabilities 2744 * [tlv] rates 2745 * [tlv] xrates 2746 * [tlv] mesh id 2747 * [tlv] mesh conf 2748 * [tlv] mesh peer link mgmt 2749 */ 2750 *frm++ = category; 2751 *frm++ = action; 2752 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2753 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2754 frm = ieee80211_add_rates(frm, rs); 2755 frm = ieee80211_add_xrates(frm, rs); 2756 frm = ieee80211_add_meshid(frm, vap); 2757 frm = ieee80211_add_meshconf(frm, vap); 2758 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2759 args[0], 0, 0); 2760 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2761 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2762 } else { 2763 vap->iv_stats.is_tx_nobuf++; 2764 ieee80211_free_node(ni); 2765 return ENOMEM; 2766 } 2767 } 2768 2769 static int 2770 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2771 int category, int action, void *args0) 2772 { 2773 struct ieee80211vap *vap = ni->ni_vap; 2774 struct ieee80211com *ic = ni->ni_ic; 2775 uint16_t *args = args0; 2776 const struct ieee80211_rateset *rs; 2777 struct mbuf *m; 2778 uint8_t *frm; 2779 2780 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2781 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2782 args[0], args[1]); 2783 2784 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2785 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2786 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2787 ieee80211_ref_node(ni); 2788 2789 m = ieee80211_getmgtframe(&frm, 2790 ic->ic_headroom + sizeof(struct ieee80211_frame), 2791 sizeof(uint16_t) /* action+category */ 2792 + sizeof(uint16_t) /* capabilites */ 2793 + sizeof(uint16_t) /* status code */ 2794 + sizeof(uint16_t) /* AID */ 2795 + 2 + IEEE80211_RATE_SIZE 2796 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2797 + 2 + IEEE80211_MESHID_LEN 2798 + sizeof(struct ieee80211_meshconf_ie) 2799 + sizeof(struct ieee80211_meshpeer_ie) 2800 ); 2801 if (m != NULL) { 2802 /* 2803 * mesh peer confirm action frame format: 2804 * [1] category 2805 * [1] action 2806 * [2] capabilities 2807 * [2] status code 2808 * [2] association id (peer ID) 2809 * [tlv] rates 2810 * [tlv] xrates 2811 * [tlv] mesh id 2812 * [tlv] mesh conf 2813 * [tlv] mesh peer link mgmt 2814 */ 2815 *frm++ = category; 2816 *frm++ = action; 2817 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2818 ADDSHORT(frm, 0); /* status code */ 2819 ADDSHORT(frm, args[1]); /* AID */ 2820 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2821 frm = ieee80211_add_rates(frm, rs); 2822 frm = ieee80211_add_xrates(frm, rs); 2823 frm = ieee80211_add_meshid(frm, vap); 2824 frm = ieee80211_add_meshconf(frm, vap); 2825 frm = ieee80211_add_meshpeer(frm, 2826 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2827 args[0], args[1], 0); 2828 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2829 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2830 } else { 2831 vap->iv_stats.is_tx_nobuf++; 2832 ieee80211_free_node(ni); 2833 return ENOMEM; 2834 } 2835 } 2836 2837 static int 2838 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2839 int category, int action, void *args0) 2840 { 2841 struct ieee80211vap *vap = ni->ni_vap; 2842 struct ieee80211com *ic = ni->ni_ic; 2843 uint16_t *args = args0; 2844 struct mbuf *m; 2845 uint8_t *frm; 2846 2847 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2848 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)", 2849 args[0], args[1], args[2], ieee80211_reason_to_string(args[2])); 2850 2851 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2852 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2853 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2854 ieee80211_ref_node(ni); 2855 2856 m = ieee80211_getmgtframe(&frm, 2857 ic->ic_headroom + sizeof(struct ieee80211_frame), 2858 sizeof(uint16_t) /* action+category */ 2859 + sizeof(uint16_t) /* reason code */ 2860 + 2 + IEEE80211_MESHID_LEN 2861 + sizeof(struct ieee80211_meshpeer_ie) 2862 ); 2863 if (m != NULL) { 2864 /* 2865 * mesh peer close action frame format: 2866 * [1] category 2867 * [1] action 2868 * [tlv] mesh id 2869 * [tlv] mesh peer link mgmt 2870 */ 2871 *frm++ = category; 2872 *frm++ = action; 2873 frm = ieee80211_add_meshid(frm, vap); 2874 frm = ieee80211_add_meshpeer(frm, 2875 IEEE80211_ACTION_MESHPEERING_CLOSE, 2876 args[0], args[1], args[2]); 2877 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2878 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2879 } else { 2880 vap->iv_stats.is_tx_nobuf++; 2881 ieee80211_free_node(ni); 2882 return ENOMEM; 2883 } 2884 } 2885 2886 static int 2887 mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2888 int category, int action, void *arg0) 2889 { 2890 struct ieee80211vap *vap = ni->ni_vap; 2891 struct ieee80211com *ic = ni->ni_ic; 2892 struct ieee80211_meshlmetric_ie *ie = arg0; 2893 struct mbuf *m; 2894 uint8_t *frm; 2895 2896 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2897 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2898 ni, "%s", "send LINK METRIC REQUEST action"); 2899 } else { 2900 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2901 ni, "send LINK METRIC REPLY action: metric 0x%x", 2902 ie->lm_metric); 2903 } 2904 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2905 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2906 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2907 ieee80211_ref_node(ni); 2908 2909 m = ieee80211_getmgtframe(&frm, 2910 ic->ic_headroom + sizeof(struct ieee80211_frame), 2911 sizeof(uint16_t) + /* action+category */ 2912 sizeof(struct ieee80211_meshlmetric_ie) 2913 ); 2914 if (m != NULL) { 2915 /* 2916 * mesh link metric 2917 * [1] category 2918 * [1] action 2919 * [tlv] mesh link metric 2920 */ 2921 *frm++ = category; 2922 *frm++ = action; 2923 frm = ieee80211_add_meshlmetric(frm, 2924 ie->lm_flags, ie->lm_metric); 2925 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2926 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2927 } else { 2928 vap->iv_stats.is_tx_nobuf++; 2929 ieee80211_free_node(ni); 2930 return ENOMEM; 2931 } 2932 } 2933 2934 static int 2935 mesh_send_action_meshgate(struct ieee80211_node *ni, 2936 int category, int action, void *arg0) 2937 { 2938 struct ieee80211vap *vap = ni->ni_vap; 2939 struct ieee80211com *ic = ni->ni_ic; 2940 struct ieee80211_meshgann_ie *ie = arg0; 2941 struct mbuf *m; 2942 uint8_t *frm; 2943 2944 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2945 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2946 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2947 ieee80211_ref_node(ni); 2948 2949 m = ieee80211_getmgtframe(&frm, 2950 ic->ic_headroom + sizeof(struct ieee80211_frame), 2951 sizeof(uint16_t) + /* action+category */ 2952 IEEE80211_MESHGANN_BASE_SZ 2953 ); 2954 if (m != NULL) { 2955 /* 2956 * mesh link metric 2957 * [1] category 2958 * [1] action 2959 * [tlv] mesh gate annoucement 2960 */ 2961 *frm++ = category; 2962 *frm++ = action; 2963 frm = ieee80211_add_meshgate(frm, ie); 2964 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2965 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 2966 } else { 2967 vap->iv_stats.is_tx_nobuf++; 2968 ieee80211_free_node(ni); 2969 return ENOMEM; 2970 } 2971 } 2972 2973 static void 2974 mesh_peer_timeout_setup(struct ieee80211_node *ni) 2975 { 2976 switch (ni->ni_mlstate) { 2977 case IEEE80211_NODE_MESH_HOLDING: 2978 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 2979 break; 2980 case IEEE80211_NODE_MESH_CONFIRMRCV: 2981 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 2982 break; 2983 case IEEE80211_NODE_MESH_IDLE: 2984 ni->ni_mltval = 0; 2985 break; 2986 default: 2987 ni->ni_mltval = ieee80211_mesh_retrytimeout; 2988 break; 2989 } 2990 if (ni->ni_mltval) 2991 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2992 mesh_peer_timeout_cb, ni); 2993 } 2994 2995 /* 2996 * Same as above but backoffs timer statisically 50%. 2997 */ 2998 static void 2999 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3000 { 3001 uint32_t r; 3002 3003 r = arc4random(); 3004 ni->ni_mltval += r % ni->ni_mltval; 3005 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3006 ni); 3007 } 3008 3009 static __inline void 3010 mesh_peer_timeout_stop(struct ieee80211_node *ni) 3011 { 3012 callout_drain(&ni->ni_mltimer); 3013 } 3014 3015 static void 3016 mesh_peer_backoff_cb(void *arg) 3017 { 3018 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3019 3020 /* After backoff timeout, try to peer automatically again. */ 3021 ni->ni_mlhcnt = 0; 3022 } 3023 3024 /* 3025 * Mesh Peer Link Management FSM timeout handling. 3026 */ 3027 static void 3028 mesh_peer_timeout_cb(void *arg) 3029 { 3030 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3031 uint16_t args[3]; 3032 3033 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3034 ni, "mesh link timeout, state %d, retry counter %d", 3035 ni->ni_mlstate, ni->ni_mlrcnt); 3036 3037 switch (ni->ni_mlstate) { 3038 case IEEE80211_NODE_MESH_IDLE: 3039 case IEEE80211_NODE_MESH_ESTABLISHED: 3040 break; 3041 case IEEE80211_NODE_MESH_OPENSNT: 3042 case IEEE80211_NODE_MESH_OPENRCV: 3043 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3044 args[0] = ni->ni_mlpid; 3045 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3046 ieee80211_send_action(ni, 3047 IEEE80211_ACTION_CAT_SELF_PROT, 3048 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3049 ni->ni_mlrcnt = 0; 3050 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3051 mesh_peer_timeout_setup(ni); 3052 } else { 3053 args[0] = ni->ni_mlpid; 3054 ieee80211_send_action(ni, 3055 IEEE80211_ACTION_CAT_SELF_PROT, 3056 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3057 ni->ni_mlrcnt++; 3058 mesh_peer_timeout_backoff(ni); 3059 } 3060 break; 3061 case IEEE80211_NODE_MESH_CONFIRMRCV: 3062 args[0] = ni->ni_mlpid; 3063 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3064 ieee80211_send_action(ni, 3065 IEEE80211_ACTION_CAT_SELF_PROT, 3066 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3067 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3068 mesh_peer_timeout_setup(ni); 3069 break; 3070 case IEEE80211_NODE_MESH_HOLDING: 3071 ni->ni_mlhcnt++; 3072 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3073 callout_reset(&ni->ni_mlhtimer, 3074 ieee80211_mesh_backofftimeout, 3075 mesh_peer_backoff_cb, ni); 3076 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3077 break; 3078 } 3079 } 3080 3081 static int 3082 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3083 { 3084 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3085 3086 if (ie == NULL || ie[1] != ms->ms_idlen) 3087 return 1; 3088 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3089 } 3090 3091 /* 3092 * Check if we are using the same algorithms for this mesh. 3093 */ 3094 static int 3095 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3096 { 3097 const struct ieee80211_meshconf_ie *meshconf = 3098 (const struct ieee80211_meshconf_ie *) ie; 3099 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3100 3101 if (meshconf == NULL) 3102 return 1; 3103 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3104 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3105 "unknown path selection algorithm: 0x%x\n", 3106 meshconf->conf_pselid); 3107 return 1; 3108 } 3109 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3110 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3111 "unknown path metric algorithm: 0x%x\n", 3112 meshconf->conf_pmetid); 3113 return 1; 3114 } 3115 if (meshconf->conf_ccid != 0) { 3116 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3117 "unknown congestion control algorithm: 0x%x\n", 3118 meshconf->conf_ccid); 3119 return 1; 3120 } 3121 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3122 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3123 "unknown sync algorithm: 0x%x\n", 3124 meshconf->conf_syncid); 3125 return 1; 3126 } 3127 if (meshconf->conf_authid != 0) { 3128 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3129 "unknown auth auth algorithm: 0x%x\n", 3130 meshconf->conf_pselid); 3131 return 1; 3132 } 3133 /* Not accepting peers */ 3134 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3135 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3136 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3137 return 1; 3138 } 3139 return 0; 3140 } 3141 3142 static int 3143 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3144 const uint8_t *ie) 3145 { 3146 const struct ieee80211_meshpeer_ie *meshpeer = 3147 (const struct ieee80211_meshpeer_ie *) ie; 3148 3149 if (meshpeer == NULL || 3150 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3151 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3152 return 1; 3153 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3154 IEEE80211_DPRINTF(vap, 3155 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3156 "Only MPM protocol is supported (proto: 0x%02X)", 3157 meshpeer->peer_proto); 3158 return 1; 3159 } 3160 switch (subtype) { 3161 case IEEE80211_ACTION_MESHPEERING_OPEN: 3162 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3163 return 1; 3164 break; 3165 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3166 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3167 return 1; 3168 break; 3169 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3170 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3171 return 1; 3172 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3173 meshpeer->peer_linkid != 0) 3174 return 1; 3175 if (meshpeer->peer_rcode == 0) 3176 return 1; 3177 break; 3178 } 3179 return 0; 3180 } 3181 3182 /* 3183 * Add a Mesh ID IE to a frame. 3184 */ 3185 uint8_t * 3186 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3187 { 3188 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3189 3190 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3191 3192 *frm++ = IEEE80211_ELEMID_MESHID; 3193 *frm++ = ms->ms_idlen; 3194 memcpy(frm, ms->ms_id, ms->ms_idlen); 3195 return frm + ms->ms_idlen; 3196 } 3197 3198 /* 3199 * Add a Mesh Configuration IE to a frame. 3200 * For now just use HWMP routing, Airtime link metric, Null Congestion 3201 * Signaling, Null Sync Protocol and Null Authentication. 3202 */ 3203 uint8_t * 3204 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3205 { 3206 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3207 uint16_t caps; 3208 3209 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3210 3211 *frm++ = IEEE80211_ELEMID_MESHCONF; 3212 *frm++ = IEEE80211_MESH_CONF_SZ; 3213 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3214 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3215 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3216 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3217 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3218 /* NB: set the number of neighbors before the rest */ 3219 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3220 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3221 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3222 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3223 frm += 1; 3224 caps = 0; 3225 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3226 caps |= IEEE80211_MESHCONF_CAP_AP; 3227 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3228 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3229 *frm++ = caps; 3230 return frm; 3231 } 3232 3233 /* 3234 * Add a Mesh Peer Management IE to a frame. 3235 */ 3236 uint8_t * 3237 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3238 uint16_t peerid, uint16_t reason) 3239 { 3240 3241 KASSERT(localid != 0, ("localid == 0")); 3242 3243 *frm++ = IEEE80211_ELEMID_MESHPEER; 3244 switch (subtype) { 3245 case IEEE80211_ACTION_MESHPEERING_OPEN: 3246 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3247 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3248 ADDSHORT(frm, localid); /* local ID */ 3249 break; 3250 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3251 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3252 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3253 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3254 ADDSHORT(frm, localid); /* local ID */ 3255 ADDSHORT(frm, peerid); /* peer ID */ 3256 break; 3257 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3258 if (peerid) 3259 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3260 else 3261 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3262 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3263 ADDSHORT(frm, localid); /* local ID */ 3264 if (peerid) 3265 ADDSHORT(frm, peerid); /* peer ID */ 3266 ADDSHORT(frm, reason); 3267 break; 3268 } 3269 return frm; 3270 } 3271 3272 /* 3273 * Compute an Airtime Link Metric for the link with this node. 3274 * 3275 * Based on Draft 3.0 spec (11B.10, p.149). 3276 */ 3277 /* 3278 * Max 802.11s overhead. 3279 */ 3280 #define IEEE80211_MESH_MAXOVERHEAD \ 3281 (sizeof(struct ieee80211_qosframe_addr4) \ 3282 + sizeof(struct ieee80211_meshcntl_ae10) \ 3283 + sizeof(struct llc) \ 3284 + IEEE80211_ADDR_LEN \ 3285 + IEEE80211_WEP_IVLEN \ 3286 + IEEE80211_WEP_KIDLEN \ 3287 + IEEE80211_WEP_CRCLEN \ 3288 + IEEE80211_WEP_MICLEN \ 3289 + IEEE80211_CRC_LEN) 3290 uint32_t 3291 mesh_airtime_calc(struct ieee80211_node *ni) 3292 { 3293 #define M_BITS 8 3294 #define S_FACTOR (2 * M_BITS) 3295 struct ieee80211com *ic = ni->ni_ic; 3296 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3297 const static int nbits = 8192 << M_BITS; 3298 uint32_t overhead, rate, errrate; 3299 uint64_t res; 3300 3301 /* Time to transmit a frame */ 3302 rate = ni->ni_txrate; 3303 overhead = ieee80211_compute_duration(ic->ic_rt, 3304 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3305 /* Error rate in percentage */ 3306 /* XXX assuming small failures are ok */ 3307 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + 3308 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) 3309 / 100; 3310 res = (overhead + (nbits / rate)) * 3311 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3312 3313 return (uint32_t)(res >> S_FACTOR); 3314 #undef M_BITS 3315 #undef S_FACTOR 3316 } 3317 3318 /* 3319 * Add a Mesh Link Metric report IE to a frame. 3320 */ 3321 uint8_t * 3322 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3323 { 3324 *frm++ = IEEE80211_ELEMID_MESHLINK; 3325 *frm++ = 5; 3326 *frm++ = flags; 3327 ADDWORD(frm, metric); 3328 return frm; 3329 } 3330 3331 /* 3332 * Add a Mesh Gate Announcement IE to a frame. 3333 */ 3334 uint8_t * 3335 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3336 { 3337 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3338 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3339 *frm++ = ie->gann_flags; 3340 *frm++ = ie->gann_hopcount; 3341 *frm++ = ie->gann_ttl; 3342 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3343 frm += 6; 3344 ADDWORD(frm, ie->gann_seq); 3345 ADDSHORT(frm, ie->gann_interval); 3346 return frm; 3347 } 3348 #undef ADDSHORT 3349 #undef ADDWORD 3350 3351 /* 3352 * Initialize any mesh-specific node state. 3353 */ 3354 void 3355 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3356 { 3357 ni->ni_flags |= IEEE80211_NODE_QOS; 3358 callout_init(&ni->ni_mltimer, 1); 3359 callout_init(&ni->ni_mlhtimer, 1); 3360 } 3361 3362 /* 3363 * Cleanup any mesh-specific node state. 3364 */ 3365 void 3366 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3367 { 3368 struct ieee80211vap *vap = ni->ni_vap; 3369 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3370 3371 callout_drain(&ni->ni_mltimer); 3372 callout_drain(&ni->ni_mlhtimer); 3373 /* NB: short-circuit callbacks after mesh_vdetach */ 3374 if (vap->iv_mesh != NULL) 3375 ms->ms_ppath->mpp_peerdown(ni); 3376 } 3377 3378 void 3379 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3380 { 3381 ni->ni_meshidlen = ie[1]; 3382 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3383 } 3384 3385 /* 3386 * Setup mesh-specific node state on neighbor discovery. 3387 */ 3388 void 3389 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3390 const struct ieee80211_frame *wh, 3391 const struct ieee80211_scanparams *sp) 3392 { 3393 ieee80211_parse_meshid(ni, sp->meshid); 3394 } 3395 3396 void 3397 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3398 struct ieee80211_beacon_offsets *bo) 3399 { 3400 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3401 3402 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3403 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3404 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3405 } 3406 } 3407 3408 static int 3409 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3410 { 3411 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3412 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3413 struct ieee80211_mesh_route *rt; 3414 struct ieee80211req_mesh_route *imr; 3415 size_t len, off; 3416 uint8_t *p; 3417 int error; 3418 3419 if (vap->iv_opmode != IEEE80211_M_MBSS) 3420 return ENOSYS; 3421 3422 error = 0; 3423 switch (ireq->i_type) { 3424 case IEEE80211_IOC_MESH_ID: 3425 ireq->i_len = ms->ms_idlen; 3426 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3427 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3428 break; 3429 case IEEE80211_IOC_MESH_AP: 3430 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3431 break; 3432 case IEEE80211_IOC_MESH_FWRD: 3433 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3434 break; 3435 case IEEE80211_IOC_MESH_GATE: 3436 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3437 break; 3438 case IEEE80211_IOC_MESH_TTL: 3439 ireq->i_val = ms->ms_ttl; 3440 break; 3441 case IEEE80211_IOC_MESH_RTCMD: 3442 switch (ireq->i_val) { 3443 case IEEE80211_MESH_RTCMD_LIST: 3444 len = 0; 3445 MESH_RT_LOCK(ms); 3446 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3447 len += sizeof(*imr); 3448 } 3449 MESH_RT_UNLOCK(ms); 3450 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3451 ireq->i_len = len; 3452 return ENOMEM; 3453 } 3454 ireq->i_len = len; 3455 /* XXX M_WAIT? */ 3456 p = IEEE80211_MALLOC(len, M_TEMP, 3457 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 3458 if (p == NULL) 3459 return ENOMEM; 3460 off = 0; 3461 MESH_RT_LOCK(ms); 3462 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3463 if (off >= len) 3464 break; 3465 imr = (struct ieee80211req_mesh_route *) 3466 (p + off); 3467 IEEE80211_ADDR_COPY(imr->imr_dest, 3468 rt->rt_dest); 3469 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3470 rt->rt_nexthop); 3471 imr->imr_metric = rt->rt_metric; 3472 imr->imr_nhops = rt->rt_nhops; 3473 imr->imr_lifetime = 3474 ieee80211_mesh_rt_update(rt, 0); 3475 imr->imr_lastmseq = rt->rt_lastmseq; 3476 imr->imr_flags = rt->rt_flags; /* last */ 3477 off += sizeof(*imr); 3478 } 3479 MESH_RT_UNLOCK(ms); 3480 error = copyout(p, (uint8_t *)ireq->i_data, 3481 ireq->i_len); 3482 IEEE80211_FREE(p, M_TEMP); 3483 break; 3484 case IEEE80211_MESH_RTCMD_FLUSH: 3485 case IEEE80211_MESH_RTCMD_ADD: 3486 case IEEE80211_MESH_RTCMD_DELETE: 3487 return EINVAL; 3488 default: 3489 return ENOSYS; 3490 } 3491 break; 3492 case IEEE80211_IOC_MESH_PR_METRIC: 3493 len = strlen(ms->ms_pmetric->mpm_descr); 3494 if (ireq->i_len < len) 3495 return EINVAL; 3496 ireq->i_len = len; 3497 error = copyout(ms->ms_pmetric->mpm_descr, 3498 (uint8_t *)ireq->i_data, len); 3499 break; 3500 case IEEE80211_IOC_MESH_PR_PATH: 3501 len = strlen(ms->ms_ppath->mpp_descr); 3502 if (ireq->i_len < len) 3503 return EINVAL; 3504 ireq->i_len = len; 3505 error = copyout(ms->ms_ppath->mpp_descr, 3506 (uint8_t *)ireq->i_data, len); 3507 break; 3508 default: 3509 return ENOSYS; 3510 } 3511 3512 return error; 3513 } 3514 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3515 3516 static int 3517 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3518 { 3519 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3520 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3521 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3522 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3523 int error; 3524 3525 if (vap->iv_opmode != IEEE80211_M_MBSS) 3526 return ENOSYS; 3527 3528 error = 0; 3529 switch (ireq->i_type) { 3530 case IEEE80211_IOC_MESH_ID: 3531 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3532 return EINVAL; 3533 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3534 if (error != 0) 3535 break; 3536 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3537 ms->ms_idlen = ireq->i_len; 3538 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3539 error = ENETRESET; 3540 break; 3541 case IEEE80211_IOC_MESH_AP: 3542 if (ireq->i_val) 3543 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3544 else 3545 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3546 error = ENETRESET; 3547 break; 3548 case IEEE80211_IOC_MESH_FWRD: 3549 if (ireq->i_val) 3550 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3551 else 3552 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3553 mesh_gatemode_setup(vap); 3554 break; 3555 case IEEE80211_IOC_MESH_GATE: 3556 if (ireq->i_val) 3557 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3558 else 3559 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3560 break; 3561 case IEEE80211_IOC_MESH_TTL: 3562 ms->ms_ttl = (uint8_t) ireq->i_val; 3563 break; 3564 case IEEE80211_IOC_MESH_RTCMD: 3565 switch (ireq->i_val) { 3566 case IEEE80211_MESH_RTCMD_LIST: 3567 return EINVAL; 3568 case IEEE80211_MESH_RTCMD_FLUSH: 3569 ieee80211_mesh_rt_flush(vap); 3570 break; 3571 case IEEE80211_MESH_RTCMD_ADD: 3572 error = copyin(ireq->i_data, tmpaddr, 3573 IEEE80211_ADDR_LEN); 3574 if (error != 0) 3575 break; 3576 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, tmpaddr) || 3577 IEEE80211_ADDR_EQ(broadcastaddr, tmpaddr)) 3578 return EINVAL; 3579 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3580 break; 3581 case IEEE80211_MESH_RTCMD_DELETE: 3582 error = copyin(ireq->i_data, tmpaddr, 3583 IEEE80211_ADDR_LEN); 3584 if (error != 0) 3585 break; 3586 ieee80211_mesh_rt_del(vap, tmpaddr); 3587 break; 3588 default: 3589 return ENOSYS; 3590 } 3591 break; 3592 case IEEE80211_IOC_MESH_PR_METRIC: 3593 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3594 if (error == 0) { 3595 error = mesh_select_proto_metric(vap, tmpproto); 3596 if (error == 0) 3597 error = ENETRESET; 3598 } 3599 break; 3600 case IEEE80211_IOC_MESH_PR_PATH: 3601 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3602 if (error == 0) { 3603 error = mesh_select_proto_path(vap, tmpproto); 3604 if (error == 0) 3605 error = ENETRESET; 3606 } 3607 break; 3608 default: 3609 return ENOSYS; 3610 } 3611 return error; 3612 } 3613 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);
Cache object: c7dc482b64856322cc00fdb1f3766d1f
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