1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2009 The FreeBSD Foundation 5 * 6 * This software was developed by Rui Paulo under sponsorship from the 7 * FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 #include <sys/cdefs.h> 31 #ifdef __FreeBSD__ 32 __FBSDID("$FreeBSD$"); 33 #endif 34 35 /* 36 * IEEE 802.11s Mesh Point (MBSS) support. 37 * 38 * Based on March 2009, D3.0 802.11s draft spec. 39 */ 40 #include "opt_inet.h" 41 #include "opt_wlan.h" 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/mbuf.h> 46 #include <sys/malloc.h> 47 #include <sys/kernel.h> 48 49 #include <sys/socket.h> 50 #include <sys/sockio.h> 51 #include <sys/endian.h> 52 #include <sys/errno.h> 53 #include <sys/proc.h> 54 #include <sys/sysctl.h> 55 56 #include <net/bpf.h> 57 #include <net/if.h> 58 #include <net/if_var.h> 59 #include <net/if_media.h> 60 #include <net/if_llc.h> 61 #include <net/if_private.h> 62 #include <net/ethernet.h> 63 64 #include <net80211/ieee80211_var.h> 65 #include <net80211/ieee80211_action.h> 66 #ifdef IEEE80211_SUPPORT_SUPERG 67 #include <net80211/ieee80211_superg.h> 68 #endif 69 #include <net80211/ieee80211_input.h> 70 #include <net80211/ieee80211_mesh.h> 71 72 static void mesh_rt_flush_invalid(struct ieee80211vap *); 73 static int mesh_select_proto_path(struct ieee80211vap *, const char *); 74 static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 75 static void mesh_vattach(struct ieee80211vap *); 76 static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 77 static void mesh_rt_cleanup_cb(void *); 78 static void mesh_gatemode_setup(struct ieee80211vap *); 79 static void mesh_gatemode_cb(void *); 80 static void mesh_linkchange(struct ieee80211_node *, 81 enum ieee80211_mesh_mlstate); 82 static void mesh_checkid(void *, struct ieee80211_node *); 83 static uint32_t mesh_generateid(struct ieee80211vap *); 84 static int mesh_checkpseq(struct ieee80211vap *, 85 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 86 static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, 87 struct ieee80211_mesh_route *); 88 static void mesh_forward(struct ieee80211vap *, struct mbuf *, 89 const struct ieee80211_meshcntl *); 90 static int mesh_input(struct ieee80211_node *, struct mbuf *, 91 const struct ieee80211_rx_stats *rxs, int, int); 92 static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 93 const struct ieee80211_rx_stats *rxs, int, int); 94 static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 95 static void mesh_peer_timeout_setup(struct ieee80211_node *); 96 static void mesh_peer_timeout_backoff(struct ieee80211_node *); 97 static void mesh_peer_timeout_cb(void *); 98 static __inline void 99 mesh_peer_timeout_stop(struct ieee80211_node *); 100 static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 101 static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 102 static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 103 const uint8_t *); 104 uint32_t mesh_airtime_calc(struct ieee80211_node *); 105 106 /* 107 * Timeout values come from the specification and are in milliseconds. 108 */ 109 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 110 "IEEE 802.11s parameters"); 111 static int ieee80211_mesh_gateint = -1; 112 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, 113 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 114 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 115 "mesh gate interval (ms)"); 116 static int ieee80211_mesh_retrytimeout = -1; 117 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, 118 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 119 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 120 "Retry timeout (msec)"); 121 static int ieee80211_mesh_holdingtimeout = -1; 122 123 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, 124 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 125 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 126 "Holding state timeout (msec)"); 127 static int ieee80211_mesh_confirmtimeout = -1; 128 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, 129 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 130 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 131 "Confirm state timeout (msec)"); 132 static int ieee80211_mesh_backofftimeout = -1; 133 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, 134 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 135 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 136 "Backoff timeout (msec). This is to throutles peering forever when " 137 "not receiving answer or is rejected by a neighbor"); 138 static int ieee80211_mesh_maxretries = 2; 139 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW, 140 &ieee80211_mesh_maxretries, 0, 141 "Maximum retries during peer link establishment"); 142 static int ieee80211_mesh_maxholding = 2; 143 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW, 144 &ieee80211_mesh_maxholding, 0, 145 "Maximum times we are allowed to transition to HOLDING state before " 146 "backinoff during peer link establishment"); 147 148 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 149 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 150 151 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 152 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 153 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 154 static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 155 static ieee80211_recv_action_func mesh_recv_action_meshgate; 156 157 static ieee80211_send_action_func mesh_send_action_meshpeering_open; 158 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 159 static ieee80211_send_action_func mesh_send_action_meshpeering_close; 160 static ieee80211_send_action_func mesh_send_action_meshlmetric; 161 static ieee80211_send_action_func mesh_send_action_meshgate; 162 163 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 164 .mpm_descr = "AIRTIME", 165 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 166 .mpm_metric = mesh_airtime_calc, 167 }; 168 169 static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 170 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 171 172 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 173 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 174 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 175 176 /* The longer one of the lifetime should be stored as new lifetime */ 177 #define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 178 179 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 180 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 181 182 /* 183 * Helper functions to manipulate the Mesh routing table. 184 */ 185 186 static struct ieee80211_mesh_route * 187 mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 188 const uint8_t dest[IEEE80211_ADDR_LEN]) 189 { 190 struct ieee80211_mesh_route *rt; 191 192 MESH_RT_LOCK_ASSERT(ms); 193 194 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 195 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 196 return rt; 197 } 198 return NULL; 199 } 200 201 static struct ieee80211_mesh_route * 202 mesh_rt_add_locked(struct ieee80211vap *vap, 203 const uint8_t dest[IEEE80211_ADDR_LEN]) 204 { 205 struct ieee80211_mesh_state *ms = vap->iv_mesh; 206 struct ieee80211_mesh_route *rt; 207 208 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 209 ("%s: adding broadcast to the routing table", __func__)); 210 211 MESH_RT_LOCK_ASSERT(ms); 212 213 rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) + 214 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, 215 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 216 if (rt != NULL) { 217 rt->rt_vap = vap; 218 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 219 rt->rt_priv = (void *)ALIGN(&rt[1]); 220 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT"); 221 callout_init(&rt->rt_discovery, 1); 222 rt->rt_updtime = ticks; /* create time */ 223 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 224 } 225 return rt; 226 } 227 228 struct ieee80211_mesh_route * 229 ieee80211_mesh_rt_find(struct ieee80211vap *vap, 230 const uint8_t dest[IEEE80211_ADDR_LEN]) 231 { 232 struct ieee80211_mesh_state *ms = vap->iv_mesh; 233 struct ieee80211_mesh_route *rt; 234 235 MESH_RT_LOCK(ms); 236 rt = mesh_rt_find_locked(ms, dest); 237 MESH_RT_UNLOCK(ms); 238 return rt; 239 } 240 241 struct ieee80211_mesh_route * 242 ieee80211_mesh_rt_add(struct ieee80211vap *vap, 243 const uint8_t dest[IEEE80211_ADDR_LEN]) 244 { 245 struct ieee80211_mesh_state *ms = vap->iv_mesh; 246 struct ieee80211_mesh_route *rt; 247 248 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 249 ("%s: duplicate entry in the routing table", __func__)); 250 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 251 ("%s: adding self to the routing table", __func__)); 252 253 MESH_RT_LOCK(ms); 254 rt = mesh_rt_add_locked(vap, dest); 255 MESH_RT_UNLOCK(ms); 256 return rt; 257 } 258 259 /* 260 * Update the route lifetime and returns the updated lifetime. 261 * If new_lifetime is zero and route is timedout it will be invalidated. 262 * new_lifetime is in msec 263 */ 264 int 265 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 266 { 267 int timesince, now; 268 uint32_t lifetime = 0; 269 270 KASSERT(rt != NULL, ("route is NULL")); 271 272 now = ticks; 273 MESH_RT_ENTRY_LOCK(rt); 274 275 /* dont clobber a proxy entry gated by us */ 276 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 277 MESH_RT_ENTRY_UNLOCK(rt); 278 return rt->rt_lifetime; 279 } 280 281 timesince = ticks_to_msecs(now - rt->rt_updtime); 282 rt->rt_updtime = now; 283 if (timesince >= rt->rt_lifetime) { 284 if (new_lifetime != 0) { 285 rt->rt_lifetime = new_lifetime; 286 } 287 else { 288 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 289 rt->rt_lifetime = 0; 290 } 291 } else { 292 /* update what is left of lifetime */ 293 rt->rt_lifetime = rt->rt_lifetime - timesince; 294 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 295 new_lifetime, rt->rt_lifetime); 296 } 297 lifetime = rt->rt_lifetime; 298 MESH_RT_ENTRY_UNLOCK(rt); 299 300 return lifetime; 301 } 302 303 /* 304 * Add a proxy route (as needed) for the specified destination. 305 */ 306 void 307 ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 308 const uint8_t dest[IEEE80211_ADDR_LEN]) 309 { 310 struct ieee80211_mesh_state *ms = vap->iv_mesh; 311 struct ieee80211_mesh_route *rt; 312 313 MESH_RT_LOCK(ms); 314 rt = mesh_rt_find_locked(ms, dest); 315 if (rt == NULL) { 316 rt = mesh_rt_add_locked(vap, dest); 317 if (rt == NULL) { 318 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 319 "%s", "unable to add proxy entry"); 320 vap->iv_stats.is_mesh_rtaddfailed++; 321 } else { 322 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 323 "%s", "add proxy entry"); 324 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 325 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 326 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 327 | IEEE80211_MESHRT_FLAGS_PROXY; 328 } 329 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 330 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 331 ("no proxy flag for poxy entry")); 332 struct ieee80211com *ic = vap->iv_ic; 333 /* 334 * Fix existing entry created by received frames from 335 * stations that have some memory of dest. We also 336 * flush any frames held on the staging queue; delivering 337 * them is too much trouble right now. 338 */ 339 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 340 "%s", "fix proxy entry"); 341 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 342 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 343 | IEEE80211_MESHRT_FLAGS_PROXY; 344 /* XXX belongs in hwmp */ 345 ieee80211_ageq_drain_node(&ic->ic_stageq, 346 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 347 /* XXX stat? */ 348 } 349 MESH_RT_UNLOCK(ms); 350 } 351 352 static __inline void 353 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 354 { 355 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 356 /* 357 * Grab the lock before destroying it, to be sure no one else 358 * is holding the route. 359 */ 360 MESH_RT_ENTRY_LOCK(rt); 361 callout_drain(&rt->rt_discovery); 362 MESH_RT_ENTRY_LOCK_DESTROY(rt); 363 IEEE80211_FREE(rt, M_80211_MESH_RT); 364 } 365 366 void 367 ieee80211_mesh_rt_del(struct ieee80211vap *vap, 368 const uint8_t dest[IEEE80211_ADDR_LEN]) 369 { 370 struct ieee80211_mesh_state *ms = vap->iv_mesh; 371 struct ieee80211_mesh_route *rt, *next; 372 373 MESH_RT_LOCK(ms); 374 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 375 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 376 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 377 ms->ms_ppath->mpp_senderror(vap, dest, rt, 378 IEEE80211_REASON_MESH_PERR_NO_PROXY); 379 } else { 380 ms->ms_ppath->mpp_senderror(vap, dest, rt, 381 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 382 } 383 mesh_rt_del(ms, rt); 384 MESH_RT_UNLOCK(ms); 385 return; 386 } 387 } 388 MESH_RT_UNLOCK(ms); 389 } 390 391 void 392 ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 393 { 394 struct ieee80211_mesh_state *ms = vap->iv_mesh; 395 struct ieee80211_mesh_route *rt, *next; 396 397 if (ms == NULL) 398 return; 399 MESH_RT_LOCK(ms); 400 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 401 mesh_rt_del(ms, rt); 402 MESH_RT_UNLOCK(ms); 403 } 404 405 void 406 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 407 const uint8_t peer[IEEE80211_ADDR_LEN]) 408 { 409 struct ieee80211_mesh_state *ms = vap->iv_mesh; 410 struct ieee80211_mesh_route *rt, *next; 411 412 MESH_RT_LOCK(ms); 413 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 414 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 415 mesh_rt_del(ms, rt); 416 } 417 MESH_RT_UNLOCK(ms); 418 } 419 420 /* 421 * Flush expired routing entries, i.e. those in invalid state for 422 * some time. 423 */ 424 static void 425 mesh_rt_flush_invalid(struct ieee80211vap *vap) 426 { 427 struct ieee80211_mesh_state *ms = vap->iv_mesh; 428 struct ieee80211_mesh_route *rt, *next; 429 430 if (ms == NULL) 431 return; 432 MESH_RT_LOCK(ms); 433 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 434 /* Discover paths will be deleted by their own callout */ 435 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 436 continue; 437 ieee80211_mesh_rt_update(rt, 0); 438 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 439 mesh_rt_del(ms, rt); 440 } 441 MESH_RT_UNLOCK(ms); 442 } 443 444 int 445 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 446 { 447 int i, firstempty = -1; 448 449 for (i = 0; i < nitems(mesh_proto_paths); i++) { 450 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 451 IEEE80211_MESH_PROTO_DSZ) == 0) 452 return EEXIST; 453 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 454 firstempty = i; 455 } 456 if (firstempty < 0) 457 return ENOSPC; 458 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 459 mesh_proto_paths[firstempty].mpp_active = 1; 460 return 0; 461 } 462 463 int 464 ieee80211_mesh_register_proto_metric(const struct 465 ieee80211_mesh_proto_metric *mpm) 466 { 467 int i, firstempty = -1; 468 469 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 470 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 471 IEEE80211_MESH_PROTO_DSZ) == 0) 472 return EEXIST; 473 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 474 firstempty = i; 475 } 476 if (firstempty < 0) 477 return ENOSPC; 478 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 479 mesh_proto_metrics[firstempty].mpm_active = 1; 480 return 0; 481 } 482 483 static int 484 mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 485 { 486 struct ieee80211_mesh_state *ms = vap->iv_mesh; 487 int i; 488 489 for (i = 0; i < nitems(mesh_proto_paths); i++) { 490 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 491 ms->ms_ppath = &mesh_proto_paths[i]; 492 return 0; 493 } 494 } 495 return ENOENT; 496 } 497 498 static int 499 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 500 { 501 struct ieee80211_mesh_state *ms = vap->iv_mesh; 502 int i; 503 504 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 505 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 506 ms->ms_pmetric = &mesh_proto_metrics[i]; 507 return 0; 508 } 509 } 510 return ENOENT; 511 } 512 513 static void 514 mesh_gatemode_setup(struct ieee80211vap *vap) 515 { 516 struct ieee80211_mesh_state *ms = vap->iv_mesh; 517 518 /* 519 * NB: When a mesh gate is running as a ROOT it shall 520 * not send out periodic GANNs but instead mark the 521 * mesh gate flag for the corresponding proactive PREQ 522 * and RANN frames. 523 */ 524 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 525 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 526 callout_drain(&ms->ms_gatetimer); 527 return ; 528 } 529 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 530 mesh_gatemode_cb, vap); 531 } 532 533 static void 534 mesh_gatemode_cb(void *arg) 535 { 536 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 537 struct ieee80211_mesh_state *ms = vap->iv_mesh; 538 struct ieee80211_meshgann_ie gann; 539 540 gann.gann_flags = 0; /* Reserved */ 541 gann.gann_hopcount = 0; 542 gann.gann_ttl = ms->ms_ttl; 543 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 544 gann.gann_seq = ms->ms_gateseq++; 545 gann.gann_interval = ieee80211_mesh_gateint; 546 547 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 548 "send broadcast GANN (seq %u)", gann.gann_seq); 549 550 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 551 IEEE80211_ACTION_MESH_GANN, &gann); 552 mesh_gatemode_setup(vap); 553 } 554 555 static void 556 ieee80211_mesh_init(void) 557 { 558 559 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 560 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 561 562 /* 563 * Setup mesh parameters that depends on the clock frequency. 564 */ 565 ieee80211_mesh_gateint = msecs_to_ticks(10000); 566 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 567 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 568 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 569 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 570 571 /* 572 * Register action frame handlers. 573 */ 574 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 575 IEEE80211_ACTION_MESHPEERING_OPEN, 576 mesh_recv_action_meshpeering_open); 577 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 578 IEEE80211_ACTION_MESHPEERING_CONFIRM, 579 mesh_recv_action_meshpeering_confirm); 580 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 581 IEEE80211_ACTION_MESHPEERING_CLOSE, 582 mesh_recv_action_meshpeering_close); 583 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 584 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 585 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 586 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 587 588 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 589 IEEE80211_ACTION_MESHPEERING_OPEN, 590 mesh_send_action_meshpeering_open); 591 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 592 IEEE80211_ACTION_MESHPEERING_CONFIRM, 593 mesh_send_action_meshpeering_confirm); 594 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 595 IEEE80211_ACTION_MESHPEERING_CLOSE, 596 mesh_send_action_meshpeering_close); 597 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 598 IEEE80211_ACTION_MESH_LMETRIC, 599 mesh_send_action_meshlmetric); 600 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 601 IEEE80211_ACTION_MESH_GANN, 602 mesh_send_action_meshgate); 603 604 /* 605 * Register Airtime Link Metric. 606 */ 607 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 608 609 } 610 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 611 612 void 613 ieee80211_mesh_attach(struct ieee80211com *ic) 614 { 615 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 616 } 617 618 void 619 ieee80211_mesh_detach(struct ieee80211com *ic) 620 { 621 } 622 623 static void 624 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 625 { 626 struct ieee80211com *ic = ni->ni_ic; 627 uint16_t args[3]; 628 629 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 630 args[0] = ni->ni_mlpid; 631 args[1] = ni->ni_mllid; 632 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 633 ieee80211_send_action(ni, 634 IEEE80211_ACTION_CAT_SELF_PROT, 635 IEEE80211_ACTION_MESHPEERING_CLOSE, 636 args); 637 } 638 callout_drain(&ni->ni_mltimer); 639 /* XXX belongs in hwmp */ 640 ieee80211_ageq_drain_node(&ic->ic_stageq, 641 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 642 } 643 644 static void 645 mesh_vdetach(struct ieee80211vap *vap) 646 { 647 struct ieee80211_mesh_state *ms = vap->iv_mesh; 648 649 callout_drain(&ms->ms_cleantimer); 650 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 651 NULL); 652 ieee80211_mesh_rt_flush(vap); 653 MESH_RT_LOCK_DESTROY(ms); 654 ms->ms_ppath->mpp_vdetach(vap); 655 IEEE80211_FREE(vap->iv_mesh, M_80211_VAP); 656 vap->iv_mesh = NULL; 657 } 658 659 static void 660 mesh_vattach(struct ieee80211vap *vap) 661 { 662 struct ieee80211_mesh_state *ms; 663 vap->iv_newstate = mesh_newstate; 664 vap->iv_input = mesh_input; 665 vap->iv_opdetach = mesh_vdetach; 666 vap->iv_recv_mgmt = mesh_recv_mgmt; 667 vap->iv_recv_ctl = mesh_recv_ctl; 668 ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 669 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 670 if (ms == NULL) { 671 printf("%s: couldn't alloc MBSS state\n", __func__); 672 return; 673 } 674 vap->iv_mesh = ms; 675 ms->ms_seq = 0; 676 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 677 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 678 TAILQ_INIT(&ms->ms_known_gates); 679 TAILQ_INIT(&ms->ms_routes); 680 MESH_RT_LOCK_INIT(ms, "MBSS"); 681 callout_init(&ms->ms_cleantimer, 1); 682 callout_init(&ms->ms_gatetimer, 1); 683 ms->ms_gateseq = 0; 684 mesh_select_proto_metric(vap, "AIRTIME"); 685 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 686 mesh_select_proto_path(vap, "HWMP"); 687 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 688 ms->ms_ppath->mpp_vattach(vap); 689 } 690 691 /* 692 * IEEE80211_M_MBSS vap state machine handler. 693 */ 694 static int 695 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 696 { 697 struct ieee80211_mesh_state *ms = vap->iv_mesh; 698 struct ieee80211com *ic = vap->iv_ic; 699 struct ieee80211_node *ni; 700 enum ieee80211_state ostate; 701 702 IEEE80211_LOCK_ASSERT(ic); 703 704 ostate = vap->iv_state; 705 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 706 __func__, ieee80211_state_name[ostate], 707 ieee80211_state_name[nstate], arg); 708 vap->iv_state = nstate; /* state transition */ 709 if (ostate != IEEE80211_S_SCAN) 710 ieee80211_cancel_scan(vap); /* background scan */ 711 ni = vap->iv_bss; /* NB: no reference held */ 712 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 713 callout_drain(&ms->ms_cleantimer); 714 callout_drain(&ms->ms_gatetimer); 715 } 716 switch (nstate) { 717 case IEEE80211_S_INIT: 718 switch (ostate) { 719 case IEEE80211_S_SCAN: 720 ieee80211_cancel_scan(vap); 721 break; 722 case IEEE80211_S_CAC: 723 ieee80211_dfs_cac_stop(vap); 724 break; 725 case IEEE80211_S_RUN: 726 ieee80211_iterate_nodes(&ic->ic_sta, 727 mesh_vdetach_peers, NULL); 728 break; 729 default: 730 break; 731 } 732 if (ostate != IEEE80211_S_INIT) { 733 /* NB: optimize INIT -> INIT case */ 734 ieee80211_reset_bss(vap); 735 ieee80211_mesh_rt_flush(vap); 736 } 737 break; 738 case IEEE80211_S_SCAN: 739 switch (ostate) { 740 case IEEE80211_S_INIT: 741 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 742 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 743 ms->ms_idlen != 0) { 744 /* 745 * Already have a channel and a mesh ID; bypass 746 * the scan and startup immediately. 747 */ 748 ieee80211_create_ibss(vap, vap->iv_des_chan); 749 break; 750 } 751 /* 752 * Initiate a scan. We can come here as a result 753 * of an IEEE80211_IOC_SCAN_REQ too in which case 754 * the vap will be marked with IEEE80211_FEXT_SCANREQ 755 * and the scan request parameters will be present 756 * in iv_scanreq. Otherwise we do the default. 757 */ 758 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 759 ieee80211_check_scan(vap, 760 vap->iv_scanreq_flags, 761 vap->iv_scanreq_duration, 762 vap->iv_scanreq_mindwell, 763 vap->iv_scanreq_maxdwell, 764 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 765 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 766 } else 767 ieee80211_check_scan_current(vap); 768 break; 769 default: 770 break; 771 } 772 break; 773 case IEEE80211_S_CAC: 774 /* 775 * Start CAC on a DFS channel. We come here when starting 776 * a bss on a DFS channel (see ieee80211_create_ibss). 777 */ 778 ieee80211_dfs_cac_start(vap); 779 break; 780 case IEEE80211_S_RUN: 781 switch (ostate) { 782 case IEEE80211_S_INIT: 783 /* 784 * Already have a channel; bypass the 785 * scan and startup immediately. 786 * Note that ieee80211_create_ibss will call 787 * back to do a RUN->RUN state change. 788 */ 789 ieee80211_create_ibss(vap, 790 ieee80211_ht_adjust_channel(ic, 791 ic->ic_curchan, vap->iv_flags_ht)); 792 /* NB: iv_bss is changed on return */ 793 break; 794 case IEEE80211_S_CAC: 795 /* 796 * NB: This is the normal state change when CAC 797 * expires and no radar was detected; no need to 798 * clear the CAC timer as it's already expired. 799 */ 800 /* fall thru... */ 801 case IEEE80211_S_CSA: 802 #if 0 803 /* 804 * Shorten inactivity timer of associated stations 805 * to weed out sta's that don't follow a CSA. 806 */ 807 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 808 #endif 809 /* 810 * Update bss node channel to reflect where 811 * we landed after CSA. 812 */ 813 ieee80211_node_set_chan(ni, 814 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 815 ieee80211_htchanflags(ni->ni_chan))); 816 /* XXX bypass debug msgs */ 817 break; 818 case IEEE80211_S_SCAN: 819 case IEEE80211_S_RUN: 820 #ifdef IEEE80211_DEBUG 821 if (ieee80211_msg_debug(vap)) { 822 ieee80211_note(vap, 823 "synchronized with %s meshid ", 824 ether_sprintf(ni->ni_meshid)); 825 ieee80211_print_essid(ni->ni_meshid, 826 ni->ni_meshidlen); 827 /* XXX MCS/HT */ 828 printf(" channel %d\n", 829 ieee80211_chan2ieee(ic, ic->ic_curchan)); 830 } 831 #endif 832 break; 833 default: 834 break; 835 } 836 ieee80211_node_authorize(ni); 837 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 838 mesh_rt_cleanup_cb, vap); 839 mesh_gatemode_setup(vap); 840 break; 841 default: 842 break; 843 } 844 /* NB: ostate not nstate */ 845 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 846 return 0; 847 } 848 849 static void 850 mesh_rt_cleanup_cb(void *arg) 851 { 852 struct ieee80211vap *vap = arg; 853 struct ieee80211_mesh_state *ms = vap->iv_mesh; 854 855 mesh_rt_flush_invalid(vap); 856 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 857 mesh_rt_cleanup_cb, vap); 858 } 859 860 /* 861 * Mark a mesh STA as gate and return a pointer to it. 862 * If this is first time, we create a new gate route. 863 * Always update the path route to this mesh gate. 864 */ 865 struct ieee80211_mesh_gate_route * 866 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 867 struct ieee80211_mesh_route *rt) 868 { 869 struct ieee80211_mesh_state *ms = vap->iv_mesh; 870 struct ieee80211_mesh_gate_route *gr = NULL, *next; 871 int found = 0; 872 873 MESH_RT_LOCK(ms); 874 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 875 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 876 found = 1; 877 break; 878 } 879 } 880 881 if (!found) { 882 /* New mesh gate add it to known table. */ 883 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 884 "%s", "stored new gate information from pro-PREQ."); 885 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 886 M_80211_MESH_GT_RT, 887 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 888 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 889 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 890 } 891 gr->gr_route = rt; 892 /* TODO: link from path route to gate route */ 893 MESH_RT_UNLOCK(ms); 894 895 return gr; 896 } 897 898 /* 899 * Helper function to note the Mesh Peer Link FSM change. 900 */ 901 static void 902 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 903 { 904 struct ieee80211vap *vap = ni->ni_vap; 905 struct ieee80211_mesh_state *ms = vap->iv_mesh; 906 #ifdef IEEE80211_DEBUG 907 static const char *meshlinkstates[] = { 908 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 909 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 910 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 911 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 912 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 913 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 914 }; 915 #endif 916 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 917 ni, "peer link: %s -> %s", 918 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 919 920 /* track neighbor count */ 921 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 922 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 923 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 924 ms->ms_neighbors++; 925 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 926 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 927 state != IEEE80211_NODE_MESH_ESTABLISHED) { 928 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 929 ms->ms_neighbors--; 930 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 931 } 932 ni->ni_mlstate = state; 933 switch (state) { 934 case IEEE80211_NODE_MESH_HOLDING: 935 ms->ms_ppath->mpp_peerdown(ni); 936 break; 937 case IEEE80211_NODE_MESH_ESTABLISHED: 938 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 939 break; 940 default: 941 break; 942 } 943 } 944 945 /* 946 * Helper function to generate a unique local ID required for mesh 947 * peer establishment. 948 */ 949 static void 950 mesh_checkid(void *arg, struct ieee80211_node *ni) 951 { 952 uint16_t *r = arg; 953 954 if (*r == ni->ni_mllid) 955 *(uint16_t *)arg = 0; 956 } 957 958 static uint32_t 959 mesh_generateid(struct ieee80211vap *vap) 960 { 961 int maxiter = 4; 962 uint16_t r; 963 964 do { 965 net80211_get_random_bytes(&r, 2); 966 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 967 maxiter--; 968 } while (r == 0 && maxiter > 0); 969 return r; 970 } 971 972 /* 973 * Verifies if we already received this packet by checking its 974 * sequence number. 975 * Returns 0 if the frame is to be accepted, 1 otherwise. 976 */ 977 static int 978 mesh_checkpseq(struct ieee80211vap *vap, 979 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 980 { 981 struct ieee80211_mesh_route *rt; 982 983 rt = ieee80211_mesh_rt_find(vap, source); 984 if (rt == NULL) { 985 rt = ieee80211_mesh_rt_add(vap, source); 986 if (rt == NULL) { 987 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 988 "%s", "add mcast route failed"); 989 vap->iv_stats.is_mesh_rtaddfailed++; 990 return 1; 991 } 992 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 993 "add mcast route, mesh seqno %d", seq); 994 rt->rt_lastmseq = seq; 995 return 0; 996 } 997 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 998 return 1; 999 } else { 1000 rt->rt_lastmseq = seq; 1001 return 0; 1002 } 1003 } 1004 1005 /* 1006 * Iterate the routing table and locate the next hop. 1007 */ 1008 struct ieee80211_node * 1009 ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1010 const uint8_t dest[IEEE80211_ADDR_LEN]) 1011 { 1012 struct ieee80211_mesh_route *rt; 1013 1014 rt = ieee80211_mesh_rt_find(vap, dest); 1015 if (rt == NULL) 1016 return NULL; 1017 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1018 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1019 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1020 /* XXX stat */ 1021 return NULL; 1022 } 1023 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1024 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1025 if (rt == NULL) return NULL; 1026 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1027 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1028 "%s: meshgate !valid, flags 0x%x", __func__, 1029 rt->rt_flags); 1030 /* XXX stat */ 1031 return NULL; 1032 } 1033 } 1034 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1035 } 1036 1037 static void 1038 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1039 struct ieee80211_mesh_route *rt_gate) 1040 { 1041 struct ifnet *ifp = vap->iv_ifp; 1042 struct ieee80211_node *ni; 1043 1044 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1045 1046 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1047 if (ni == NULL) { 1048 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1049 m_freem(m); 1050 return; 1051 } 1052 1053 /* 1054 * Send through the VAP packet transmit path. 1055 * This consumes the node ref grabbed above and 1056 * the mbuf, regardless of whether there's a problem 1057 * or not. 1058 */ 1059 (void) ieee80211_vap_pkt_send_dest(vap, m, ni); 1060 } 1061 1062 /* 1063 * Forward the queued frames to known valid mesh gates. 1064 * Assume destination to be outside the MBSS (i.e. proxy entry), 1065 * If no valid mesh gates are known silently discard queued frames. 1066 * After transmitting frames to all known valid mesh gates, this route 1067 * will be marked invalid, and a new path discovery will happen in the hopes 1068 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1069 */ 1070 void 1071 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1072 struct ieee80211_mesh_route *rt_dest) 1073 { 1074 struct ieee80211com *ic = vap->iv_ic; 1075 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1076 struct ieee80211_mesh_route *rt_gate; 1077 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1078 struct mbuf *m, *mcopy, *next; 1079 1080 IEEE80211_TX_UNLOCK_ASSERT(ic); 1081 1082 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1083 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1084 1085 /* XXX: send to more than one valid mash gate */ 1086 MESH_RT_LOCK(ms); 1087 1088 m = ieee80211_ageq_remove(&ic->ic_stageq, 1089 (struct ieee80211_node *)(uintptr_t) 1090 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1091 1092 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1093 rt_gate = gr->gr_route; 1094 if (rt_gate == NULL) { 1095 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1096 rt_dest->rt_dest, 1097 "mesh gate with no path %6D", 1098 gr->gr_addr, ":"); 1099 continue; 1100 } 1101 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1102 continue; 1103 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1104 ("route not marked as a mesh gate")); 1105 KASSERT((rt_gate->rt_flags & 1106 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1107 ("found mesh gate that is also marked porxy")); 1108 /* 1109 * convert route to a proxy route gated by the current 1110 * mesh gate, this is needed so encap can built data 1111 * frame with correct address. 1112 */ 1113 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1114 IEEE80211_MESHRT_FLAGS_VALID; 1115 rt_dest->rt_ext_seq = 1; /* random value */ 1116 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1117 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1118 rt_dest->rt_metric = rt_gate->rt_metric; 1119 rt_dest->rt_nhops = rt_gate->rt_nhops; 1120 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1121 MESH_RT_UNLOCK(ms); 1122 /* XXX: lock?? */ 1123 mcopy = m_dup(m, IEEE80211_M_NOWAIT); 1124 for (; mcopy != NULL; mcopy = next) { 1125 next = mcopy->m_nextpkt; 1126 mcopy->m_nextpkt = NULL; 1127 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1128 rt_dest->rt_dest, 1129 "flush queued frame %p len %d", mcopy, 1130 mcopy->m_pkthdr.len); 1131 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1132 } 1133 MESH_RT_LOCK(ms); 1134 } 1135 rt_dest->rt_flags = 0; /* Mark invalid */ 1136 m_freem(m); 1137 MESH_RT_UNLOCK(ms); 1138 } 1139 1140 /* 1141 * Forward the specified frame. 1142 * Decrement the TTL and set TA to our MAC address. 1143 */ 1144 static void 1145 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1146 const struct ieee80211_meshcntl *mc) 1147 { 1148 struct ieee80211com *ic = vap->iv_ic; 1149 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1150 struct ifnet *ifp = vap->iv_ifp; 1151 const struct ieee80211_frame *wh = 1152 mtod(m, const struct ieee80211_frame *); 1153 struct mbuf *mcopy; 1154 struct ieee80211_meshcntl *mccopy; 1155 struct ieee80211_frame *whcopy; 1156 struct ieee80211_node *ni; 1157 int err; 1158 1159 /* This is called from the RX path - don't hold this lock */ 1160 IEEE80211_TX_UNLOCK_ASSERT(ic); 1161 1162 /* 1163 * mesh ttl of 1 means we are the last one receiving it, 1164 * according to amendment we decrement and then check if 1165 * 0, if so we dont forward. 1166 */ 1167 if (mc->mc_ttl < 1) { 1168 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1169 "%s", "frame not fwd'd, ttl 1"); 1170 vap->iv_stats.is_mesh_fwd_ttl++; 1171 return; 1172 } 1173 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1174 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1175 "%s", "frame not fwd'd, fwding disabled"); 1176 vap->iv_stats.is_mesh_fwd_disabled++; 1177 return; 1178 } 1179 mcopy = m_dup(m, IEEE80211_M_NOWAIT); 1180 if (mcopy == NULL) { 1181 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1182 "%s", "frame not fwd'd, cannot dup"); 1183 vap->iv_stats.is_mesh_fwd_nobuf++; 1184 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1185 return; 1186 } 1187 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1188 sizeof(struct ieee80211_meshcntl)); 1189 if (mcopy == NULL) { 1190 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1191 "%s", "frame not fwd'd, too short"); 1192 vap->iv_stats.is_mesh_fwd_tooshort++; 1193 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1194 m_freem(mcopy); 1195 return; 1196 } 1197 whcopy = mtod(mcopy, struct ieee80211_frame *); 1198 mccopy = (struct ieee80211_meshcntl *) 1199 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1200 /* XXX clear other bits? */ 1201 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1202 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1203 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1204 ni = ieee80211_ref_node(vap->iv_bss); 1205 mcopy->m_flags |= M_MCAST; 1206 } else { 1207 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1208 if (ni == NULL) { 1209 /* 1210 * [Optional] any of the following three actions: 1211 * o silently discard 1212 * o trigger a path discovery 1213 * o inform TA that meshDA is unknown. 1214 */ 1215 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1216 "%s", "frame not fwd'd, no path"); 1217 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1218 IEEE80211_REASON_MESH_PERR_NO_FI); 1219 vap->iv_stats.is_mesh_fwd_nopath++; 1220 m_freem(mcopy); 1221 return; 1222 } 1223 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1224 } 1225 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1226 mccopy->mc_ttl--; 1227 1228 /* XXX calculate priority so drivers can find the tx queue */ 1229 M_WME_SETAC(mcopy, WME_AC_BE); 1230 1231 /* XXX do we know m_nextpkt is NULL? */ 1232 MPASS((mcopy->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0); 1233 mcopy->m_pkthdr.rcvif = (void *) ni; 1234 1235 /* 1236 * XXX this bypasses all of the VAP TX handling; it passes frames 1237 * directly to the parent interface. 1238 * 1239 * Because of this, there's no TX lock being held as there's no 1240 * encaps state being used. 1241 * 1242 * Doing a direct parent transmit may not be the correct thing 1243 * to do here; we'll have to re-think this soon. 1244 */ 1245 IEEE80211_TX_LOCK(ic); 1246 err = ieee80211_parent_xmitpkt(ic, mcopy); 1247 IEEE80211_TX_UNLOCK(ic); 1248 if (!err) 1249 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1250 } 1251 1252 static struct mbuf * 1253 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1254 { 1255 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1256 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1257 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1258 sizeof(struct ieee80211_meshcntl_ae10)]; 1259 const struct ieee80211_qosframe_addr4 *wh; 1260 const struct ieee80211_meshcntl_ae10 *mc; 1261 struct ether_header *eh; 1262 struct llc *llc; 1263 int ae; 1264 1265 if (m->m_len < hdrlen + sizeof(*llc) && 1266 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1267 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1268 "discard data frame: %s", "m_pullup failed"); 1269 vap->iv_stats.is_rx_tooshort++; 1270 return NULL; 1271 } 1272 memcpy(b, mtod(m, caddr_t), hdrlen); 1273 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1274 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1275 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1276 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1277 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1278 1279 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1280 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1281 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1282 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1283 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1284 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1285 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1286 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1287 llc = NULL; 1288 } else { 1289 m_adj(m, hdrlen - sizeof(*eh)); 1290 } 1291 eh = mtod(m, struct ether_header *); 1292 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1293 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1294 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1295 if (ae == IEEE80211_MESH_AE_00) { 1296 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1297 } else if (ae == IEEE80211_MESH_AE_01) { 1298 IEEE80211_ADDR_COPY(eh->ether_shost, 1299 MC01(mc)->mc_addr4); 1300 } else { 1301 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1302 (const struct ieee80211_frame *)wh, NULL, 1303 "bad AE %d", ae); 1304 vap->iv_stats.is_mesh_badae++; 1305 m_freem(m); 1306 return NULL; 1307 } 1308 } else { 1309 if (ae == IEEE80211_MESH_AE_00) { 1310 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1311 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1312 } else if (ae == IEEE80211_MESH_AE_10) { 1313 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1314 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1315 } else { 1316 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1317 (const struct ieee80211_frame *)wh, NULL, 1318 "bad AE %d", ae); 1319 vap->iv_stats.is_mesh_badae++; 1320 m_freem(m); 1321 return NULL; 1322 } 1323 } 1324 #ifndef __NO_STRICT_ALIGNMENT 1325 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1326 m = ieee80211_realign(vap, m, sizeof(*eh)); 1327 if (m == NULL) 1328 return NULL; 1329 } 1330 #endif /* !__NO_STRICT_ALIGNMENT */ 1331 if (llc != NULL) { 1332 eh = mtod(m, struct ether_header *); 1333 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1334 } 1335 return m; 1336 #undef WDIR 1337 #undef MC01 1338 } 1339 1340 /* 1341 * Return non-zero if the unicast mesh data frame should be processed 1342 * locally. Frames that are not proxy'd have our address, otherwise 1343 * we need to consult the routing table to look for a proxy entry. 1344 */ 1345 static __inline int 1346 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1347 const struct ieee80211_meshcntl *mc) 1348 { 1349 int ae = mc->mc_flags & 3; 1350 1351 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1352 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1353 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1354 ("bad AE %d", ae)); 1355 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1356 const struct ieee80211_meshcntl_ae10 *mc10 = 1357 (const struct ieee80211_meshcntl_ae10 *) mc; 1358 struct ieee80211_mesh_route *rt = 1359 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1360 /* check for proxy route to ourself */ 1361 return (rt != NULL && 1362 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1363 } else /* ucast w/o proxy */ 1364 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1365 } 1366 1367 /* 1368 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1369 * > 0 means we have forwarded data and no need to process locally 1370 * == 0 means we want to process locally (and we may have forwarded data 1371 * < 0 means there was an error and data should be discarded 1372 */ 1373 static int 1374 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1375 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1376 { 1377 struct ieee80211_qosframe_addr4 *qwh; 1378 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1379 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1380 1381 /* This is called from the RX path - don't hold this lock */ 1382 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1383 1384 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1385 1386 /* 1387 * TODO: 1388 * o verify addr2 is a legitimate transmitter 1389 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1390 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1391 */ 1392 1393 /* set lifetime of addr3 (meshDA) to initial value */ 1394 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1395 if (rt_meshda == NULL) { 1396 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1397 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1398 /* 1399 * [Optional] any of the following three actions: 1400 * o silently discard [X] 1401 * o trigger a path discovery [ ] 1402 * o inform TA that meshDA is unknown. [ ] 1403 */ 1404 /* XXX: stats */ 1405 return (-1); 1406 } 1407 1408 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1409 ms->ms_ppath->mpp_inact)); 1410 1411 /* set lifetime of addr4 (meshSA) to initial value */ 1412 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1413 KASSERT(rt_meshsa != NULL, ("no route")); 1414 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1415 ms->ms_ppath->mpp_inact)); 1416 1417 mesh_forward(vap, m, mc); 1418 return (1); /* dont process locally */ 1419 } 1420 1421 /* 1422 * Verifies transmitter, updates lifetime, precursor list and process data 1423 * locally, if data is proxy with AE = 10 it could mean data should go 1424 * on another mesh path or data should be forwarded to the DS. 1425 * 1426 * > 0 means we have forwarded data and no need to process locally 1427 * == 0 means we want to process locally (and we may have forwarded data 1428 * < 0 means there was an error and data should be discarded 1429 */ 1430 static int 1431 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1432 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1433 { 1434 struct ieee80211_qosframe_addr4 *qwh; 1435 const struct ieee80211_meshcntl_ae10 *mc10; 1436 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1437 struct ieee80211_mesh_route *rt; 1438 int ae; 1439 1440 /* This is called from the RX path - don't hold this lock */ 1441 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1442 1443 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1444 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1445 1446 /* 1447 * TODO: 1448 * o verify addr2 is a legitimate transmitter 1449 * o lifetime of precursor entry is max(init, curr) 1450 */ 1451 1452 /* set lifetime of addr4 (meshSA) to initial value */ 1453 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1454 KASSERT(rt != NULL, ("no route")); 1455 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1456 rt = NULL; 1457 1458 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1459 KASSERT(ae == IEEE80211_MESH_AE_00 || 1460 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1461 if (ae == IEEE80211_MESH_AE_10) { 1462 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1463 return (0); /* process locally */ 1464 } 1465 1466 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1467 if (rt != NULL && 1468 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1469 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1470 /* 1471 * Forward on another mesh-path, according to 1472 * amendment as specified in 9.32.4.1 1473 */ 1474 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1475 mesh_forward(vap, m, 1476 (const struct ieee80211_meshcntl *)mc10); 1477 return (1); /* dont process locally */ 1478 } 1479 /* 1480 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1481 * addressed according to 13.11.3.2. 1482 */ 1483 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1484 "forward frame to DS, SA(%6D) DA(%6D)", 1485 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1486 } 1487 return (0); /* process locally */ 1488 } 1489 1490 /* 1491 * Try to forward the group addressed data on to other mesh STAs, and 1492 * also to the DS. 1493 * 1494 * > 0 means we have forwarded data and no need to process locally 1495 * == 0 means we want to process locally (and we may have forwarded data 1496 * < 0 means there was an error and data should be discarded 1497 */ 1498 static int 1499 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1500 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1501 { 1502 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1503 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1504 1505 /* This is called from the RX path - don't hold this lock */ 1506 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1507 1508 mesh_forward(vap, m, mc); 1509 1510 if(mc->mc_ttl > 0) { 1511 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1512 /* 1513 * Forward of MSDUs from the MBSS to DS group addressed 1514 * (according to 13.11.3.2) 1515 * This happens by delivering the packet, and a bridge 1516 * will sent it on another port member. 1517 */ 1518 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1519 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) { 1520 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1521 MC01(mc)->mc_addr4, "%s", 1522 "forward from MBSS to the DS"); 1523 } 1524 } 1525 } 1526 return (0); /* process locally */ 1527 #undef MC01 1528 } 1529 1530 static int 1531 mesh_input(struct ieee80211_node *ni, struct mbuf *m, 1532 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1533 { 1534 #define HAS_SEQ(type) ((type & 0x4) == 0) 1535 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1536 struct ieee80211vap *vap = ni->ni_vap; 1537 struct ieee80211com *ic = ni->ni_ic; 1538 struct ifnet *ifp = vap->iv_ifp; 1539 struct ieee80211_frame *wh; 1540 const struct ieee80211_meshcntl *mc; 1541 int hdrspace, meshdrlen, need_tap, error; 1542 uint8_t dir, type, subtype, ae; 1543 uint32_t seq; 1544 const uint8_t *addr; 1545 uint8_t qos[2]; 1546 1547 KASSERT(ni != NULL, ("null node")); 1548 ni->ni_inact = ni->ni_inact_reload; 1549 1550 need_tap = 1; /* mbuf need to be tapped. */ 1551 type = -1; /* undefined */ 1552 1553 /* This is called from the RX path - don't hold this lock */ 1554 IEEE80211_TX_UNLOCK_ASSERT(ic); 1555 1556 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1557 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1558 ni->ni_macaddr, NULL, 1559 "too short (1): len %u", m->m_pkthdr.len); 1560 vap->iv_stats.is_rx_tooshort++; 1561 goto out; 1562 } 1563 /* 1564 * Bit of a cheat here, we use a pointer for a 3-address 1565 * frame format but don't reference fields past outside 1566 * ieee80211_frame_min w/o first validating the data is 1567 * present. 1568 */ 1569 wh = mtod(m, struct ieee80211_frame *); 1570 1571 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1572 IEEE80211_FC0_VERSION_0) { 1573 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1574 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1575 vap->iv_stats.is_rx_badversion++; 1576 goto err; 1577 } 1578 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1579 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1580 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1581 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1582 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1583 ni->ni_noise = nf; 1584 if (HAS_SEQ(type)) { 1585 uint8_t tid = ieee80211_gettid(wh); 1586 1587 if (IEEE80211_QOS_HAS_SEQ(wh) && 1588 TID_TO_WME_AC(tid) >= WME_AC_VI) 1589 ic->ic_wme.wme_hipri_traffic++; 1590 if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs)) 1591 goto out; 1592 } 1593 } 1594 #ifdef IEEE80211_DEBUG 1595 /* 1596 * It's easier, but too expensive, to simulate different mesh 1597 * topologies by consulting the ACL policy very early, so do this 1598 * only under DEBUG. 1599 * 1600 * NB: this check is also done upon peering link initiation. 1601 */ 1602 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1603 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1604 wh, NULL, "%s", "disallowed by ACL"); 1605 vap->iv_stats.is_rx_acl++; 1606 goto out; 1607 } 1608 #endif 1609 switch (type) { 1610 case IEEE80211_FC0_TYPE_DATA: 1611 if (ni == vap->iv_bss) 1612 goto out; 1613 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1614 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1615 ni->ni_macaddr, NULL, 1616 "peer link not yet established (%d)", 1617 ni->ni_mlstate); 1618 vap->iv_stats.is_mesh_nolink++; 1619 goto out; 1620 } 1621 if (dir != IEEE80211_FC1_DIR_FROMDS && 1622 dir != IEEE80211_FC1_DIR_DSTODS) { 1623 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1624 wh, "data", "incorrect dir 0x%x", dir); 1625 vap->iv_stats.is_rx_wrongdir++; 1626 goto err; 1627 } 1628 1629 /* All Mesh data frames are QoS subtype */ 1630 if (!HAS_SEQ(type)) { 1631 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1632 wh, "data", "incorrect subtype 0x%x", subtype); 1633 vap->iv_stats.is_rx_badsubtype++; 1634 goto err; 1635 } 1636 1637 /* 1638 * Next up, any fragmentation. 1639 * XXX: we defrag before we even try to forward, 1640 * Mesh Control field is not present in sub-sequent 1641 * fragmented frames. This is in contrast to Draft 4.0. 1642 */ 1643 hdrspace = ieee80211_hdrspace(ic, wh); 1644 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1645 m = ieee80211_defrag(ni, m, hdrspace, 0); 1646 if (m == NULL) { 1647 /* Fragment dropped or frame not complete yet */ 1648 goto out; 1649 } 1650 } 1651 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1652 1653 /* 1654 * Now we have a complete Mesh Data frame. 1655 */ 1656 1657 /* 1658 * Only fromDStoDS data frames use 4 address qos frames 1659 * as specified in amendment. Otherwise addr4 is located 1660 * in the Mesh Control field and a 3 address qos frame 1661 * is used. 1662 */ 1663 *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh); 1664 1665 /* 1666 * NB: The mesh STA sets the Mesh Control Present 1667 * subfield to 1 in the Mesh Data frame containing 1668 * an unfragmented MSDU, an A-MSDU, or the first 1669 * fragment of an MSDU. 1670 * After defrag it should always be present. 1671 */ 1672 if (!(qos[1] & IEEE80211_QOS_MC)) { 1673 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1674 ni->ni_macaddr, NULL, 1675 "%s", "Mesh control field not present"); 1676 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1677 goto err; 1678 } 1679 1680 /* pull up enough to get to the mesh control */ 1681 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1682 (m = m_pullup(m, hdrspace + 1683 sizeof(struct ieee80211_meshcntl))) == NULL) { 1684 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1685 ni->ni_macaddr, NULL, 1686 "data too short: expecting %u", hdrspace); 1687 vap->iv_stats.is_rx_tooshort++; 1688 goto out; /* XXX */ 1689 } 1690 /* 1691 * Now calculate the full extent of the headers. Note 1692 * mesh_decap will pull up anything we didn't get 1693 * above when it strips the 802.11 headers. 1694 */ 1695 mc = (const struct ieee80211_meshcntl *) 1696 (mtod(m, const uint8_t *) + hdrspace); 1697 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1698 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1699 ae * IEEE80211_ADDR_LEN; 1700 hdrspace += meshdrlen; 1701 1702 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1703 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1704 (m->m_len < hdrspace) && 1705 ((m = m_pullup(m, hdrspace)) == NULL)) { 1706 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1707 ni->ni_macaddr, NULL, 1708 "data too short: expecting %u", hdrspace); 1709 vap->iv_stats.is_rx_tooshort++; 1710 goto out; /* XXX */ 1711 } 1712 /* XXX: are we sure there is no reallocating after m_pullup? */ 1713 1714 seq = le32dec(mc->mc_seq); 1715 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1716 addr = wh->i_addr3; 1717 else if (ae == IEEE80211_MESH_AE_01) 1718 addr = MC01(mc)->mc_addr4; 1719 else 1720 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1721 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1722 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1723 addr, "data", "%s", "not to me"); 1724 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1725 goto out; 1726 } 1727 if (mesh_checkpseq(vap, addr, seq) != 0) { 1728 vap->iv_stats.is_rx_dup++; 1729 goto out; 1730 } 1731 1732 /* This code "routes" the frame to the right control path */ 1733 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1734 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1735 error = 1736 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1737 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1738 error = mesh_recv_group_data(vap, m, wh, mc); 1739 else 1740 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1741 wh, mc); 1742 } else 1743 error = mesh_recv_group_data(vap, m, wh, mc); 1744 if (error < 0) 1745 goto err; 1746 else if (error > 0) 1747 goto out; 1748 1749 if (ieee80211_radiotap_active_vap(vap)) 1750 ieee80211_radiotap_rx(vap, m); 1751 need_tap = 0; 1752 1753 /* 1754 * Finally, strip the 802.11 header. 1755 */ 1756 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1757 if (m == NULL) { 1758 /* XXX mask bit to check for both */ 1759 /* don't count Null data frames as errors */ 1760 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1761 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1762 goto out; 1763 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1764 ni->ni_macaddr, "data", "%s", "decap error"); 1765 vap->iv_stats.is_rx_decap++; 1766 IEEE80211_NODE_STAT(ni, rx_decap); 1767 goto err; 1768 } 1769 if (qos[0] & IEEE80211_QOS_AMSDU) { 1770 m = ieee80211_decap_amsdu(ni, m); 1771 if (m == NULL) 1772 return IEEE80211_FC0_TYPE_DATA; 1773 } 1774 ieee80211_deliver_data(vap, ni, m); 1775 return type; 1776 case IEEE80211_FC0_TYPE_MGT: 1777 vap->iv_stats.is_rx_mgmt++; 1778 IEEE80211_NODE_STAT(ni, rx_mgmt); 1779 if (dir != IEEE80211_FC1_DIR_NODS) { 1780 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1781 wh, "mgt", "incorrect dir 0x%x", dir); 1782 vap->iv_stats.is_rx_wrongdir++; 1783 goto err; 1784 } 1785 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1786 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1787 ni->ni_macaddr, "mgt", "too short: len %u", 1788 m->m_pkthdr.len); 1789 vap->iv_stats.is_rx_tooshort++; 1790 goto out; 1791 } 1792 #ifdef IEEE80211_DEBUG 1793 if ((ieee80211_msg_debug(vap) && 1794 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1795 ieee80211_msg_dumppkts(vap)) { 1796 if_printf(ifp, "received %s from %s rssi %d\n", 1797 ieee80211_mgt_subtype_name(subtype), 1798 ether_sprintf(wh->i_addr2), rssi); 1799 } 1800 #endif 1801 if (IEEE80211_IS_PROTECTED(wh)) { 1802 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1803 wh, NULL, "%s", "WEP set but not permitted"); 1804 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1805 goto out; 1806 } 1807 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 1808 goto out; 1809 case IEEE80211_FC0_TYPE_CTL: 1810 vap->iv_stats.is_rx_ctl++; 1811 IEEE80211_NODE_STAT(ni, rx_ctrl); 1812 goto out; 1813 default: 1814 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1815 wh, "bad", "frame type 0x%x", type); 1816 /* should not come here */ 1817 break; 1818 } 1819 err: 1820 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1821 out: 1822 if (m != NULL) { 1823 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1824 ieee80211_radiotap_rx(vap, m); 1825 m_freem(m); 1826 } 1827 return type; 1828 #undef HAS_SEQ 1829 #undef MC01 1830 } 1831 1832 static void 1833 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1834 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1835 { 1836 struct ieee80211vap *vap = ni->ni_vap; 1837 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1838 struct ieee80211com *ic = ni->ni_ic; 1839 struct ieee80211_channel *rxchan = ic->ic_curchan; 1840 struct ieee80211_frame *wh; 1841 struct ieee80211_mesh_route *rt; 1842 uint8_t *frm, *efrm; 1843 1844 wh = mtod(m0, struct ieee80211_frame *); 1845 frm = (uint8_t *)&wh[1]; 1846 efrm = mtod(m0, uint8_t *) + m0->m_len; 1847 switch (subtype) { 1848 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1849 case IEEE80211_FC0_SUBTYPE_BEACON: 1850 { 1851 struct ieee80211_scanparams scan; 1852 struct ieee80211_channel *c; 1853 /* 1854 * We process beacon/probe response 1855 * frames to discover neighbors. 1856 */ 1857 if (rxs != NULL) { 1858 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1859 if (c != NULL) 1860 rxchan = c; 1861 } 1862 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) 1863 return; 1864 /* 1865 * Count frame now that we know it's to be processed. 1866 */ 1867 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1868 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1869 IEEE80211_NODE_STAT(ni, rx_beacons); 1870 } else 1871 IEEE80211_NODE_STAT(ni, rx_proberesp); 1872 /* 1873 * If scanning, just pass information to the scan module. 1874 */ 1875 if (ic->ic_flags & IEEE80211_F_SCAN) { 1876 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1877 /* 1878 * Actively scanning a channel marked passive; 1879 * send a probe request now that we know there 1880 * is 802.11 traffic present. 1881 * 1882 * XXX check if the beacon we recv'd gives 1883 * us what we need and suppress the probe req 1884 */ 1885 ieee80211_probe_curchan(vap, 1); 1886 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1887 } 1888 ieee80211_add_scan(vap, rxchan, &scan, wh, 1889 subtype, rssi, nf); 1890 return; 1891 } 1892 1893 /* The rest of this code assumes we are running */ 1894 if (vap->iv_state != IEEE80211_S_RUN) 1895 return; 1896 /* 1897 * Ignore non-mesh STAs. 1898 */ 1899 if ((scan.capinfo & 1900 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1901 scan.meshid == NULL || scan.meshconf == NULL) { 1902 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1903 wh, "beacon", "%s", "not a mesh sta"); 1904 vap->iv_stats.is_mesh_wrongmesh++; 1905 return; 1906 } 1907 /* 1908 * Ignore STAs for other mesh networks. 1909 */ 1910 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1911 mesh_verify_meshconf(vap, scan.meshconf)) { 1912 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1913 wh, "beacon", "%s", "not for our mesh"); 1914 vap->iv_stats.is_mesh_wrongmesh++; 1915 return; 1916 } 1917 /* 1918 * Peer only based on the current ACL policy. 1919 */ 1920 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1921 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1922 wh, NULL, "%s", "disallowed by ACL"); 1923 vap->iv_stats.is_rx_acl++; 1924 return; 1925 } 1926 /* 1927 * Do neighbor discovery. 1928 */ 1929 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1930 /* 1931 * Create a new entry in the neighbor table. 1932 */ 1933 ni = ieee80211_add_neighbor(vap, wh, &scan); 1934 } 1935 /* 1936 * Automatically peer with discovered nodes if possible. 1937 */ 1938 if (ni != vap->iv_bss && 1939 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1940 switch (ni->ni_mlstate) { 1941 case IEEE80211_NODE_MESH_IDLE: 1942 { 1943 uint16_t args[1]; 1944 1945 /* Wait for backoff callout to reset counter */ 1946 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1947 return; 1948 1949 ni->ni_mlpid = mesh_generateid(vap); 1950 if (ni->ni_mlpid == 0) 1951 return; 1952 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1953 args[0] = ni->ni_mlpid; 1954 ieee80211_send_action(ni, 1955 IEEE80211_ACTION_CAT_SELF_PROT, 1956 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1957 ni->ni_mlrcnt = 0; 1958 mesh_peer_timeout_setup(ni); 1959 break; 1960 } 1961 case IEEE80211_NODE_MESH_ESTABLISHED: 1962 { 1963 /* 1964 * Valid beacon from a peer mesh STA 1965 * bump TA lifetime 1966 */ 1967 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1968 if(rt != NULL) { 1969 ieee80211_mesh_rt_update(rt, 1970 ticks_to_msecs( 1971 ms->ms_ppath->mpp_inact)); 1972 } 1973 break; 1974 } 1975 default: 1976 break; /* ignore */ 1977 } 1978 } 1979 break; 1980 } 1981 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1982 { 1983 uint8_t *ssid, *meshid, *rates, *xrates; 1984 1985 if (vap->iv_state != IEEE80211_S_RUN) { 1986 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1987 wh, NULL, "wrong state %s", 1988 ieee80211_state_name[vap->iv_state]); 1989 vap->iv_stats.is_rx_mgtdiscard++; 1990 return; 1991 } 1992 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1993 /* frame must be directed */ 1994 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1995 wh, NULL, "%s", "not unicast"); 1996 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1997 return; 1998 } 1999 /* 2000 * prreq frame format 2001 * [tlv] ssid 2002 * [tlv] supported rates 2003 * [tlv] extended supported rates 2004 * [tlv] mesh id 2005 */ 2006 ssid = meshid = rates = xrates = NULL; 2007 while (efrm - frm > 1) { 2008 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2009 switch (*frm) { 2010 case IEEE80211_ELEMID_SSID: 2011 ssid = frm; 2012 break; 2013 case IEEE80211_ELEMID_RATES: 2014 rates = frm; 2015 break; 2016 case IEEE80211_ELEMID_XRATES: 2017 xrates = frm; 2018 break; 2019 case IEEE80211_ELEMID_MESHID: 2020 meshid = frm; 2021 break; 2022 } 2023 frm += frm[1] + 2; 2024 } 2025 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2026 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2027 if (xrates != NULL) 2028 IEEE80211_VERIFY_ELEMENT(xrates, 2029 IEEE80211_RATE_MAXSIZE - rates[1], return); 2030 if (meshid != NULL) { 2031 IEEE80211_VERIFY_ELEMENT(meshid, 2032 IEEE80211_MESHID_LEN, return); 2033 /* NB: meshid, not ssid */ 2034 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2035 } 2036 2037 /* XXX find a better class or define it's own */ 2038 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2039 "%s", "recv probe req"); 2040 /* 2041 * Some legacy 11b clients cannot hack a complete 2042 * probe response frame. When the request includes 2043 * only a bare-bones rate set, communicate this to 2044 * the transmit side. 2045 */ 2046 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2047 break; 2048 } 2049 2050 case IEEE80211_FC0_SUBTYPE_ACTION: 2051 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2052 if (ni == vap->iv_bss) { 2053 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2054 wh, NULL, "%s", "unknown node"); 2055 vap->iv_stats.is_rx_mgtdiscard++; 2056 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2057 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2058 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2059 wh, NULL, "%s", "not for us"); 2060 vap->iv_stats.is_rx_mgtdiscard++; 2061 } else if (vap->iv_state != IEEE80211_S_RUN) { 2062 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2063 wh, NULL, "wrong state %s", 2064 ieee80211_state_name[vap->iv_state]); 2065 vap->iv_stats.is_rx_mgtdiscard++; 2066 } else { 2067 if (ieee80211_parse_action(ni, m0) == 0) 2068 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2069 } 2070 break; 2071 2072 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2073 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2074 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2075 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2076 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 2077 case IEEE80211_FC0_SUBTYPE_ATIM: 2078 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2079 case IEEE80211_FC0_SUBTYPE_AUTH: 2080 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2081 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2082 wh, NULL, "%s", "not handled"); 2083 vap->iv_stats.is_rx_mgtdiscard++; 2084 break; 2085 2086 default: 2087 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2088 wh, "mgt", "subtype 0x%x not handled", subtype); 2089 vap->iv_stats.is_rx_badsubtype++; 2090 break; 2091 } 2092 } 2093 2094 static void 2095 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2096 { 2097 2098 switch (subtype) { 2099 case IEEE80211_FC0_SUBTYPE_BAR: 2100 ieee80211_recv_bar(ni, m); 2101 break; 2102 } 2103 } 2104 2105 /* 2106 * Parse meshpeering action ie's for MPM frames 2107 */ 2108 static const struct ieee80211_meshpeer_ie * 2109 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2110 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2111 const uint8_t *frm, const uint8_t *efrm, 2112 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2113 { 2114 struct ieee80211vap *vap = ni->ni_vap; 2115 const struct ieee80211_meshpeer_ie *mpie; 2116 uint16_t args[3]; 2117 const uint8_t *meshid, *meshconf; 2118 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2119 2120 meshid = meshconf = NULL; 2121 while (efrm - frm > 1) { 2122 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2123 switch (*frm) { 2124 case IEEE80211_ELEMID_MESHID: 2125 meshid = frm; 2126 break; 2127 case IEEE80211_ELEMID_MESHCONF: 2128 meshconf = frm; 2129 break; 2130 case IEEE80211_ELEMID_MESHPEER: 2131 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2132 memset(mp, 0, sizeof(*mp)); 2133 mp->peer_len = mpie->peer_len; 2134 mp->peer_proto = le16dec(&mpie->peer_proto); 2135 mp->peer_llinkid = le16dec(&mpie->peer_llinkid); 2136 switch (subtype) { 2137 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2138 mp->peer_linkid = 2139 le16dec(&mpie->peer_linkid); 2140 break; 2141 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2142 /* NB: peer link ID is optional */ 2143 if (mpie->peer_len == 2144 (IEEE80211_MPM_BASE_SZ + 2)) { 2145 mp->peer_linkid = 0; 2146 mp->peer_rcode = 2147 le16dec(&mpie->peer_linkid); 2148 } else { 2149 mp->peer_linkid = 2150 le16dec(&mpie->peer_linkid); 2151 mp->peer_rcode = 2152 le16dec(&mpie->peer_rcode); 2153 } 2154 break; 2155 } 2156 break; 2157 } 2158 frm += frm[1] + 2; 2159 } 2160 2161 /* 2162 * Verify the contents of the frame. 2163 * If it fails validation, close the peer link. 2164 */ 2165 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2166 sendclose = 1; 2167 IEEE80211_DISCARD(vap, 2168 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2169 wh, NULL, "%s", "MPM validation failed"); 2170 } 2171 2172 /* If meshid is not the same reject any frames type. */ 2173 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2174 sendclose = 1; 2175 IEEE80211_DISCARD(vap, 2176 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2177 wh, NULL, "%s", "not for our mesh"); 2178 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2179 /* 2180 * Standard not clear about this, if we dont ignore 2181 * there will be an endless loop between nodes sending 2182 * CLOSE frames between each other with wrong meshid. 2183 * Discard and timers will bring FSM to IDLE state. 2184 */ 2185 return NULL; 2186 } 2187 } 2188 2189 /* 2190 * Close frames are accepted if meshid is the same. 2191 * Verify the other two types. 2192 */ 2193 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2194 mesh_verify_meshconf(vap, meshconf)) { 2195 sendclose = 1; 2196 IEEE80211_DISCARD(vap, 2197 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2198 wh, NULL, "%s", "configuration mismatch"); 2199 } 2200 2201 if (sendclose) { 2202 vap->iv_stats.is_rx_mgtdiscard++; 2203 switch (ni->ni_mlstate) { 2204 case IEEE80211_NODE_MESH_IDLE: 2205 case IEEE80211_NODE_MESH_ESTABLISHED: 2206 case IEEE80211_NODE_MESH_HOLDING: 2207 /* ignore */ 2208 break; 2209 case IEEE80211_NODE_MESH_OPENSNT: 2210 case IEEE80211_NODE_MESH_OPENRCV: 2211 case IEEE80211_NODE_MESH_CONFIRMRCV: 2212 args[0] = ni->ni_mlpid; 2213 args[1] = ni->ni_mllid; 2214 /* Reason codes for rejection */ 2215 switch (subtype) { 2216 case IEEE80211_ACTION_MESHPEERING_OPEN: 2217 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2218 break; 2219 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2220 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2221 break; 2222 } 2223 ieee80211_send_action(ni, 2224 IEEE80211_ACTION_CAT_SELF_PROT, 2225 IEEE80211_ACTION_MESHPEERING_CLOSE, 2226 args); 2227 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2228 mesh_peer_timeout_setup(ni); 2229 break; 2230 } 2231 return NULL; 2232 } 2233 2234 return (const struct ieee80211_meshpeer_ie *) mp; 2235 } 2236 2237 static int 2238 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2239 const struct ieee80211_frame *wh, 2240 const uint8_t *frm, const uint8_t *efrm) 2241 { 2242 struct ieee80211vap *vap = ni->ni_vap; 2243 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2244 struct ieee80211_meshpeer_ie ie; 2245 const struct ieee80211_meshpeer_ie *meshpeer; 2246 uint16_t args[3]; 2247 2248 /* +2+2 for action + code + capabilites */ 2249 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2250 IEEE80211_ACTION_MESHPEERING_OPEN); 2251 if (meshpeer == NULL) { 2252 return 0; 2253 } 2254 2255 /* XXX move up */ 2256 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2257 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2258 2259 switch (ni->ni_mlstate) { 2260 case IEEE80211_NODE_MESH_IDLE: 2261 /* Reject open request if reached our maximum neighbor count */ 2262 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2263 args[0] = meshpeer->peer_llinkid; 2264 args[1] = 0; 2265 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2266 ieee80211_send_action(ni, 2267 IEEE80211_ACTION_CAT_SELF_PROT, 2268 IEEE80211_ACTION_MESHPEERING_CLOSE, 2269 args); 2270 /* stay in IDLE state */ 2271 return (0); 2272 } 2273 /* Open frame accepted */ 2274 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2275 ni->ni_mllid = meshpeer->peer_llinkid; 2276 ni->ni_mlpid = mesh_generateid(vap); 2277 if (ni->ni_mlpid == 0) 2278 return 0; /* XXX */ 2279 args[0] = ni->ni_mlpid; 2280 /* Announce we're open too... */ 2281 ieee80211_send_action(ni, 2282 IEEE80211_ACTION_CAT_SELF_PROT, 2283 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2284 /* ...and confirm the link. */ 2285 args[0] = ni->ni_mlpid; 2286 args[1] = ni->ni_mllid; 2287 ieee80211_send_action(ni, 2288 IEEE80211_ACTION_CAT_SELF_PROT, 2289 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2290 args); 2291 mesh_peer_timeout_setup(ni); 2292 break; 2293 case IEEE80211_NODE_MESH_OPENRCV: 2294 /* Wrong Link ID */ 2295 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2296 args[0] = ni->ni_mllid; 2297 args[1] = ni->ni_mlpid; 2298 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2299 ieee80211_send_action(ni, 2300 IEEE80211_ACTION_CAT_SELF_PROT, 2301 IEEE80211_ACTION_MESHPEERING_CLOSE, 2302 args); 2303 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2304 mesh_peer_timeout_setup(ni); 2305 break; 2306 } 2307 /* Duplicate open, confirm again. */ 2308 args[0] = ni->ni_mlpid; 2309 args[1] = ni->ni_mllid; 2310 ieee80211_send_action(ni, 2311 IEEE80211_ACTION_CAT_SELF_PROT, 2312 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2313 args); 2314 break; 2315 case IEEE80211_NODE_MESH_OPENSNT: 2316 ni->ni_mllid = meshpeer->peer_llinkid; 2317 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2318 args[0] = ni->ni_mlpid; 2319 args[1] = ni->ni_mllid; 2320 ieee80211_send_action(ni, 2321 IEEE80211_ACTION_CAT_SELF_PROT, 2322 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2323 args); 2324 /* NB: don't setup/clear any timeout */ 2325 break; 2326 case IEEE80211_NODE_MESH_CONFIRMRCV: 2327 if (ni->ni_mlpid != meshpeer->peer_linkid || 2328 ni->ni_mllid != meshpeer->peer_llinkid) { 2329 args[0] = ni->ni_mlpid; 2330 args[1] = ni->ni_mllid; 2331 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2332 ieee80211_send_action(ni, 2333 IEEE80211_ACTION_CAT_SELF_PROT, 2334 IEEE80211_ACTION_MESHPEERING_CLOSE, 2335 args); 2336 mesh_linkchange(ni, 2337 IEEE80211_NODE_MESH_HOLDING); 2338 mesh_peer_timeout_setup(ni); 2339 break; 2340 } 2341 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2342 ni->ni_mllid = meshpeer->peer_llinkid; 2343 args[0] = ni->ni_mlpid; 2344 args[1] = ni->ni_mllid; 2345 ieee80211_send_action(ni, 2346 IEEE80211_ACTION_CAT_SELF_PROT, 2347 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2348 args); 2349 mesh_peer_timeout_stop(ni); 2350 break; 2351 case IEEE80211_NODE_MESH_ESTABLISHED: 2352 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2353 args[0] = ni->ni_mllid; 2354 args[1] = ni->ni_mlpid; 2355 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2356 ieee80211_send_action(ni, 2357 IEEE80211_ACTION_CAT_SELF_PROT, 2358 IEEE80211_ACTION_MESHPEERING_CLOSE, 2359 args); 2360 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2361 mesh_peer_timeout_setup(ni); 2362 break; 2363 } 2364 args[0] = ni->ni_mlpid; 2365 args[1] = ni->ni_mllid; 2366 ieee80211_send_action(ni, 2367 IEEE80211_ACTION_CAT_SELF_PROT, 2368 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2369 args); 2370 break; 2371 case IEEE80211_NODE_MESH_HOLDING: 2372 args[0] = ni->ni_mlpid; 2373 args[1] = meshpeer->peer_llinkid; 2374 /* Standard not clear about what the reaason code should be */ 2375 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2376 ieee80211_send_action(ni, 2377 IEEE80211_ACTION_CAT_SELF_PROT, 2378 IEEE80211_ACTION_MESHPEERING_CLOSE, 2379 args); 2380 break; 2381 } 2382 return 0; 2383 } 2384 2385 static int 2386 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2387 const struct ieee80211_frame *wh, 2388 const uint8_t *frm, const uint8_t *efrm) 2389 { 2390 struct ieee80211vap *vap = ni->ni_vap; 2391 struct ieee80211_meshpeer_ie ie; 2392 const struct ieee80211_meshpeer_ie *meshpeer; 2393 uint16_t args[3]; 2394 2395 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2396 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2397 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2398 if (meshpeer == NULL) { 2399 return 0; 2400 } 2401 2402 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2403 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2404 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2405 2406 switch (ni->ni_mlstate) { 2407 case IEEE80211_NODE_MESH_OPENRCV: 2408 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2409 mesh_peer_timeout_stop(ni); 2410 break; 2411 case IEEE80211_NODE_MESH_OPENSNT: 2412 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2413 mesh_peer_timeout_setup(ni); 2414 break; 2415 case IEEE80211_NODE_MESH_HOLDING: 2416 args[0] = ni->ni_mlpid; 2417 args[1] = meshpeer->peer_llinkid; 2418 /* Standard not clear about what the reaason code should be */ 2419 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2420 ieee80211_send_action(ni, 2421 IEEE80211_ACTION_CAT_SELF_PROT, 2422 IEEE80211_ACTION_MESHPEERING_CLOSE, 2423 args); 2424 break; 2425 case IEEE80211_NODE_MESH_CONFIRMRCV: 2426 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2427 args[0] = ni->ni_mlpid; 2428 args[1] = ni->ni_mllid; 2429 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2430 ieee80211_send_action(ni, 2431 IEEE80211_ACTION_CAT_SELF_PROT, 2432 IEEE80211_ACTION_MESHPEERING_CLOSE, 2433 args); 2434 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2435 mesh_peer_timeout_setup(ni); 2436 } 2437 break; 2438 default: 2439 IEEE80211_DISCARD(vap, 2440 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2441 wh, NULL, "received confirm in invalid state %d", 2442 ni->ni_mlstate); 2443 vap->iv_stats.is_rx_mgtdiscard++; 2444 break; 2445 } 2446 return 0; 2447 } 2448 2449 static int 2450 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2451 const struct ieee80211_frame *wh, 2452 const uint8_t *frm, const uint8_t *efrm) 2453 { 2454 struct ieee80211_meshpeer_ie ie; 2455 const struct ieee80211_meshpeer_ie *meshpeer; 2456 uint16_t args[3]; 2457 2458 /* +2 for action + code */ 2459 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2460 IEEE80211_ACTION_MESHPEERING_CLOSE); 2461 if (meshpeer == NULL) { 2462 return 0; 2463 } 2464 2465 /* 2466 * XXX: check reason code, for example we could receive 2467 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2468 * to peer again. 2469 */ 2470 2471 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2472 ni, "%s", "recv PEER CLOSE"); 2473 2474 switch (ni->ni_mlstate) { 2475 case IEEE80211_NODE_MESH_IDLE: 2476 /* ignore */ 2477 break; 2478 case IEEE80211_NODE_MESH_OPENRCV: 2479 case IEEE80211_NODE_MESH_OPENSNT: 2480 case IEEE80211_NODE_MESH_CONFIRMRCV: 2481 case IEEE80211_NODE_MESH_ESTABLISHED: 2482 args[0] = ni->ni_mlpid; 2483 args[1] = ni->ni_mllid; 2484 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2485 ieee80211_send_action(ni, 2486 IEEE80211_ACTION_CAT_SELF_PROT, 2487 IEEE80211_ACTION_MESHPEERING_CLOSE, 2488 args); 2489 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2490 mesh_peer_timeout_setup(ni); 2491 break; 2492 case IEEE80211_NODE_MESH_HOLDING: 2493 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2494 mesh_peer_timeout_stop(ni); 2495 break; 2496 } 2497 return 0; 2498 } 2499 2500 /* 2501 * Link Metric handling. 2502 */ 2503 static int 2504 mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2505 const struct ieee80211_frame *wh, 2506 const uint8_t *frm, const uint8_t *efrm) 2507 { 2508 const struct ieee80211_meshlmetric_ie *ie = 2509 (const struct ieee80211_meshlmetric_ie *) 2510 (frm+2); /* action + code */ 2511 struct ieee80211_meshlmetric_ie lm_rep; 2512 2513 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2514 lm_rep.lm_flags = 0; 2515 lm_rep.lm_metric = mesh_airtime_calc(ni); 2516 ieee80211_send_action(ni, 2517 IEEE80211_ACTION_CAT_MESH, 2518 IEEE80211_ACTION_MESH_LMETRIC, 2519 &lm_rep); 2520 } 2521 /* XXX: else do nothing for now */ 2522 return 0; 2523 } 2524 2525 /* 2526 * Parse meshgate action ie's for GANN frames. 2527 * Returns -1 if parsing fails, otherwise 0. 2528 */ 2529 static int 2530 mesh_parse_meshgate_action(struct ieee80211_node *ni, 2531 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2532 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2533 { 2534 struct ieee80211vap *vap = ni->ni_vap; 2535 const struct ieee80211_meshgann_ie *gannie; 2536 2537 while (efrm - frm > 1) { 2538 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2539 switch (*frm) { 2540 case IEEE80211_ELEMID_MESHGANN: 2541 gannie = (const struct ieee80211_meshgann_ie *) frm; 2542 memset(ie, 0, sizeof(*ie)); 2543 ie->gann_ie = gannie->gann_ie; 2544 ie->gann_len = gannie->gann_len; 2545 ie->gann_flags = gannie->gann_flags; 2546 ie->gann_hopcount = gannie->gann_hopcount; 2547 ie->gann_ttl = gannie->gann_ttl; 2548 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2549 ie->gann_seq = le32dec(&gannie->gann_seq); 2550 ie->gann_interval = le16dec(&gannie->gann_interval); 2551 break; 2552 } 2553 frm += frm[1] + 2; 2554 } 2555 2556 return 0; 2557 } 2558 2559 /* 2560 * Mesh Gate Announcement handling. 2561 */ 2562 static int 2563 mesh_recv_action_meshgate(struct ieee80211_node *ni, 2564 const struct ieee80211_frame *wh, 2565 const uint8_t *frm, const uint8_t *efrm) 2566 { 2567 struct ieee80211vap *vap = ni->ni_vap; 2568 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2569 struct ieee80211_mesh_gate_route *gr, *next; 2570 struct ieee80211_mesh_route *rt_gate; 2571 struct ieee80211_meshgann_ie pgann; 2572 struct ieee80211_meshgann_ie ie; 2573 int found = 0; 2574 2575 /* +2 for action + code */ 2576 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2577 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2578 ni->ni_macaddr, NULL, "%s", 2579 "GANN parsing failed"); 2580 vap->iv_stats.is_rx_mgtdiscard++; 2581 return (0); 2582 } 2583 2584 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2585 return 0; 2586 2587 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2588 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2589 ie.gann_seq); 2590 2591 if (ms == NULL) 2592 return (0); 2593 MESH_RT_LOCK(ms); 2594 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2595 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2596 continue; 2597 if (ie.gann_seq <= gr->gr_lastseq) { 2598 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2599 ni->ni_macaddr, NULL, 2600 "GANN old seqno %u <= %u", 2601 ie.gann_seq, gr->gr_lastseq); 2602 MESH_RT_UNLOCK(ms); 2603 return (0); 2604 } 2605 /* corresponding mesh gate found & GANN accepted */ 2606 found = 1; 2607 break; 2608 } 2609 if (found == 0) { 2610 /* this GANN is from a new mesh Gate add it to known table. */ 2611 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2612 "stored new GANN information, seq %u.", ie.gann_seq); 2613 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2614 M_80211_MESH_GT_RT, 2615 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2616 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2617 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2618 } 2619 gr->gr_lastseq = ie.gann_seq; 2620 2621 /* check if we have a path to this gate */ 2622 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2623 if (rt_gate != NULL && 2624 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2625 gr->gr_route = rt_gate; 2626 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2627 } 2628 2629 MESH_RT_UNLOCK(ms); 2630 2631 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2632 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2633 return 0; 2634 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2635 pgann.gann_hopcount = ie.gann_hopcount + 1; 2636 pgann.gann_ttl = ie.gann_ttl - 1; 2637 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2638 pgann.gann_seq = ie.gann_seq; 2639 pgann.gann_interval = ie.gann_interval; 2640 2641 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2642 "%s", "propagate GANN"); 2643 2644 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2645 IEEE80211_ACTION_MESH_GANN, &pgann); 2646 2647 return 0; 2648 } 2649 2650 static int 2651 mesh_send_action(struct ieee80211_node *ni, 2652 const uint8_t sa[IEEE80211_ADDR_LEN], 2653 const uint8_t da[IEEE80211_ADDR_LEN], 2654 struct mbuf *m) 2655 { 2656 struct ieee80211vap *vap = ni->ni_vap; 2657 struct ieee80211com *ic = ni->ni_ic; 2658 struct ieee80211_bpf_params params; 2659 int ret; 2660 2661 KASSERT(ni != NULL, ("null node")); 2662 2663 if (vap->iv_state == IEEE80211_S_CAC) { 2664 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2665 "block %s frame in CAC state", "Mesh action"); 2666 vap->iv_stats.is_tx_badstate++; 2667 ieee80211_free_node(ni); 2668 m_freem(m); 2669 return EIO; /* XXX */ 2670 } 2671 2672 M_PREPEND(m, sizeof(struct ieee80211_frame), IEEE80211_M_NOWAIT); 2673 if (m == NULL) { 2674 ieee80211_free_node(ni); 2675 return ENOMEM; 2676 } 2677 2678 IEEE80211_TX_LOCK(ic); 2679 ieee80211_send_setup(ni, m, 2680 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2681 IEEE80211_NONQOS_TID, sa, da, sa); 2682 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2683 2684 memset(¶ms, 0, sizeof(params)); 2685 params.ibp_pri = WME_AC_VO; 2686 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2687 if (IEEE80211_IS_MULTICAST(da)) 2688 params.ibp_try0 = 1; 2689 else 2690 params.ibp_try0 = ni->ni_txparms->maxretry; 2691 params.ibp_power = ni->ni_txpower; 2692 2693 IEEE80211_NODE_STAT(ni, tx_mgmt); 2694 2695 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2696 IEEE80211_TX_UNLOCK(ic); 2697 return (ret); 2698 } 2699 2700 #define ADDSHORT(frm, v) do { \ 2701 frm[0] = (v) & 0xff; \ 2702 frm[1] = (v) >> 8; \ 2703 frm += 2; \ 2704 } while (0) 2705 #define ADDWORD(frm, v) do { \ 2706 frm[0] = (v) & 0xff; \ 2707 frm[1] = ((v) >> 8) & 0xff; \ 2708 frm[2] = ((v) >> 16) & 0xff; \ 2709 frm[3] = ((v) >> 24) & 0xff; \ 2710 frm += 4; \ 2711 } while (0) 2712 2713 static int 2714 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2715 int category, int action, void *args0) 2716 { 2717 struct ieee80211vap *vap = ni->ni_vap; 2718 struct ieee80211com *ic = ni->ni_ic; 2719 uint16_t *args = args0; 2720 const struct ieee80211_rateset *rs; 2721 struct mbuf *m; 2722 uint8_t *frm; 2723 2724 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2725 "send PEER OPEN action: localid 0x%x", args[0]); 2726 2727 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2728 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2729 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2730 ieee80211_ref_node(ni); 2731 2732 m = ieee80211_getmgtframe(&frm, 2733 ic->ic_headroom + sizeof(struct ieee80211_frame), 2734 sizeof(uint16_t) /* action+category */ 2735 + sizeof(uint16_t) /* capabilites */ 2736 + 2 + IEEE80211_RATE_SIZE 2737 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2738 + 2 + IEEE80211_MESHID_LEN 2739 + sizeof(struct ieee80211_meshconf_ie) 2740 + sizeof(struct ieee80211_meshpeer_ie) 2741 ); 2742 if (m != NULL) { 2743 /* 2744 * mesh peer open action frame format: 2745 * [1] category 2746 * [1] action 2747 * [2] capabilities 2748 * [tlv] rates 2749 * [tlv] xrates 2750 * [tlv] mesh id 2751 * [tlv] mesh conf 2752 * [tlv] mesh peer link mgmt 2753 */ 2754 *frm++ = category; 2755 *frm++ = action; 2756 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2757 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2758 frm = ieee80211_add_rates(frm, rs); 2759 frm = ieee80211_add_xrates(frm, rs); 2760 frm = ieee80211_add_meshid(frm, vap); 2761 frm = ieee80211_add_meshconf(frm, vap); 2762 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2763 args[0], 0, 0); 2764 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2765 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2766 } else { 2767 vap->iv_stats.is_tx_nobuf++; 2768 ieee80211_free_node(ni); 2769 return ENOMEM; 2770 } 2771 } 2772 2773 static int 2774 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2775 int category, int action, void *args0) 2776 { 2777 struct ieee80211vap *vap = ni->ni_vap; 2778 struct ieee80211com *ic = ni->ni_ic; 2779 uint16_t *args = args0; 2780 const struct ieee80211_rateset *rs; 2781 struct mbuf *m; 2782 uint8_t *frm; 2783 2784 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2785 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2786 args[0], args[1]); 2787 2788 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2789 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2790 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2791 ieee80211_ref_node(ni); 2792 2793 m = ieee80211_getmgtframe(&frm, 2794 ic->ic_headroom + sizeof(struct ieee80211_frame), 2795 sizeof(uint16_t) /* action+category */ 2796 + sizeof(uint16_t) /* capabilites */ 2797 + sizeof(uint16_t) /* status code */ 2798 + sizeof(uint16_t) /* AID */ 2799 + 2 + IEEE80211_RATE_SIZE 2800 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2801 + 2 + IEEE80211_MESHID_LEN 2802 + sizeof(struct ieee80211_meshconf_ie) 2803 + sizeof(struct ieee80211_meshpeer_ie) 2804 ); 2805 if (m != NULL) { 2806 /* 2807 * mesh peer confirm action frame format: 2808 * [1] category 2809 * [1] action 2810 * [2] capabilities 2811 * [2] status code 2812 * [2] association id (peer ID) 2813 * [tlv] rates 2814 * [tlv] xrates 2815 * [tlv] mesh id 2816 * [tlv] mesh conf 2817 * [tlv] mesh peer link mgmt 2818 */ 2819 *frm++ = category; 2820 *frm++ = action; 2821 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2822 ADDSHORT(frm, 0); /* status code */ 2823 ADDSHORT(frm, args[1]); /* AID */ 2824 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2825 frm = ieee80211_add_rates(frm, rs); 2826 frm = ieee80211_add_xrates(frm, rs); 2827 frm = ieee80211_add_meshid(frm, vap); 2828 frm = ieee80211_add_meshconf(frm, vap); 2829 frm = ieee80211_add_meshpeer(frm, 2830 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2831 args[0], args[1], 0); 2832 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2833 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2834 } else { 2835 vap->iv_stats.is_tx_nobuf++; 2836 ieee80211_free_node(ni); 2837 return ENOMEM; 2838 } 2839 } 2840 2841 static int 2842 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2843 int category, int action, void *args0) 2844 { 2845 struct ieee80211vap *vap = ni->ni_vap; 2846 struct ieee80211com *ic = ni->ni_ic; 2847 uint16_t *args = args0; 2848 struct mbuf *m; 2849 uint8_t *frm; 2850 2851 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2852 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)", 2853 args[0], args[1], args[2], ieee80211_reason_to_string(args[2])); 2854 2855 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2856 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2857 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2858 ieee80211_ref_node(ni); 2859 2860 m = ieee80211_getmgtframe(&frm, 2861 ic->ic_headroom + sizeof(struct ieee80211_frame), 2862 sizeof(uint16_t) /* action+category */ 2863 + sizeof(uint16_t) /* reason code */ 2864 + 2 + IEEE80211_MESHID_LEN 2865 + sizeof(struct ieee80211_meshpeer_ie) 2866 ); 2867 if (m != NULL) { 2868 /* 2869 * mesh peer close action frame format: 2870 * [1] category 2871 * [1] action 2872 * [tlv] mesh id 2873 * [tlv] mesh peer link mgmt 2874 */ 2875 *frm++ = category; 2876 *frm++ = action; 2877 frm = ieee80211_add_meshid(frm, vap); 2878 frm = ieee80211_add_meshpeer(frm, 2879 IEEE80211_ACTION_MESHPEERING_CLOSE, 2880 args[0], args[1], args[2]); 2881 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2882 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2883 } else { 2884 vap->iv_stats.is_tx_nobuf++; 2885 ieee80211_free_node(ni); 2886 return ENOMEM; 2887 } 2888 } 2889 2890 static int 2891 mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2892 int category, int action, void *arg0) 2893 { 2894 struct ieee80211vap *vap = ni->ni_vap; 2895 struct ieee80211com *ic = ni->ni_ic; 2896 struct ieee80211_meshlmetric_ie *ie = arg0; 2897 struct mbuf *m; 2898 uint8_t *frm; 2899 2900 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2901 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2902 ni, "%s", "send LINK METRIC REQUEST action"); 2903 } else { 2904 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2905 ni, "send LINK METRIC REPLY action: metric 0x%x", 2906 ie->lm_metric); 2907 } 2908 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2909 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2910 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2911 ieee80211_ref_node(ni); 2912 2913 m = ieee80211_getmgtframe(&frm, 2914 ic->ic_headroom + sizeof(struct ieee80211_frame), 2915 sizeof(uint16_t) + /* action+category */ 2916 sizeof(struct ieee80211_meshlmetric_ie) 2917 ); 2918 if (m != NULL) { 2919 /* 2920 * mesh link metric 2921 * [1] category 2922 * [1] action 2923 * [tlv] mesh link metric 2924 */ 2925 *frm++ = category; 2926 *frm++ = action; 2927 frm = ieee80211_add_meshlmetric(frm, 2928 ie->lm_flags, ie->lm_metric); 2929 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2930 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2931 } else { 2932 vap->iv_stats.is_tx_nobuf++; 2933 ieee80211_free_node(ni); 2934 return ENOMEM; 2935 } 2936 } 2937 2938 static int 2939 mesh_send_action_meshgate(struct ieee80211_node *ni, 2940 int category, int action, void *arg0) 2941 { 2942 struct ieee80211vap *vap = ni->ni_vap; 2943 struct ieee80211com *ic = ni->ni_ic; 2944 struct ieee80211_meshgann_ie *ie = arg0; 2945 struct mbuf *m; 2946 uint8_t *frm; 2947 2948 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2949 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2950 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2951 ieee80211_ref_node(ni); 2952 2953 m = ieee80211_getmgtframe(&frm, 2954 ic->ic_headroom + sizeof(struct ieee80211_frame), 2955 sizeof(uint16_t) + /* action+category */ 2956 IEEE80211_MESHGANN_BASE_SZ 2957 ); 2958 if (m != NULL) { 2959 /* 2960 * mesh link metric 2961 * [1] category 2962 * [1] action 2963 * [tlv] mesh gate announcement 2964 */ 2965 *frm++ = category; 2966 *frm++ = action; 2967 frm = ieee80211_add_meshgate(frm, ie); 2968 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2969 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 2970 } else { 2971 vap->iv_stats.is_tx_nobuf++; 2972 ieee80211_free_node(ni); 2973 return ENOMEM; 2974 } 2975 } 2976 2977 static void 2978 mesh_peer_timeout_setup(struct ieee80211_node *ni) 2979 { 2980 switch (ni->ni_mlstate) { 2981 case IEEE80211_NODE_MESH_HOLDING: 2982 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 2983 break; 2984 case IEEE80211_NODE_MESH_CONFIRMRCV: 2985 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 2986 break; 2987 case IEEE80211_NODE_MESH_IDLE: 2988 ni->ni_mltval = 0; 2989 break; 2990 default: 2991 ni->ni_mltval = ieee80211_mesh_retrytimeout; 2992 break; 2993 } 2994 if (ni->ni_mltval) 2995 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2996 mesh_peer_timeout_cb, ni); 2997 } 2998 2999 /* 3000 * Same as above but backoffs timer statisically 50%. 3001 */ 3002 static void 3003 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3004 { 3005 uint32_t r; 3006 3007 r = arc4random(); 3008 ni->ni_mltval += r % ni->ni_mltval; 3009 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3010 ni); 3011 } 3012 3013 static __inline void 3014 mesh_peer_timeout_stop(struct ieee80211_node *ni) 3015 { 3016 callout_drain(&ni->ni_mltimer); 3017 } 3018 3019 static void 3020 mesh_peer_backoff_cb(void *arg) 3021 { 3022 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3023 3024 /* After backoff timeout, try to peer automatically again. */ 3025 ni->ni_mlhcnt = 0; 3026 } 3027 3028 /* 3029 * Mesh Peer Link Management FSM timeout handling. 3030 */ 3031 static void 3032 mesh_peer_timeout_cb(void *arg) 3033 { 3034 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3035 uint16_t args[3]; 3036 3037 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3038 ni, "mesh link timeout, state %d, retry counter %d", 3039 ni->ni_mlstate, ni->ni_mlrcnt); 3040 3041 switch (ni->ni_mlstate) { 3042 case IEEE80211_NODE_MESH_IDLE: 3043 case IEEE80211_NODE_MESH_ESTABLISHED: 3044 break; 3045 case IEEE80211_NODE_MESH_OPENSNT: 3046 case IEEE80211_NODE_MESH_OPENRCV: 3047 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3048 args[0] = ni->ni_mlpid; 3049 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3050 ieee80211_send_action(ni, 3051 IEEE80211_ACTION_CAT_SELF_PROT, 3052 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3053 ni->ni_mlrcnt = 0; 3054 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3055 mesh_peer_timeout_setup(ni); 3056 } else { 3057 args[0] = ni->ni_mlpid; 3058 ieee80211_send_action(ni, 3059 IEEE80211_ACTION_CAT_SELF_PROT, 3060 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3061 ni->ni_mlrcnt++; 3062 mesh_peer_timeout_backoff(ni); 3063 } 3064 break; 3065 case IEEE80211_NODE_MESH_CONFIRMRCV: 3066 args[0] = ni->ni_mlpid; 3067 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3068 ieee80211_send_action(ni, 3069 IEEE80211_ACTION_CAT_SELF_PROT, 3070 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3071 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3072 mesh_peer_timeout_setup(ni); 3073 break; 3074 case IEEE80211_NODE_MESH_HOLDING: 3075 ni->ni_mlhcnt++; 3076 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3077 callout_reset(&ni->ni_mlhtimer, 3078 ieee80211_mesh_backofftimeout, 3079 mesh_peer_backoff_cb, ni); 3080 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3081 break; 3082 } 3083 } 3084 3085 static int 3086 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3087 { 3088 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3089 3090 if (ie == NULL || ie[1] != ms->ms_idlen) 3091 return 1; 3092 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3093 } 3094 3095 /* 3096 * Check if we are using the same algorithms for this mesh. 3097 */ 3098 static int 3099 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3100 { 3101 const struct ieee80211_meshconf_ie *meshconf = 3102 (const struct ieee80211_meshconf_ie *) ie; 3103 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3104 3105 if (meshconf == NULL) 3106 return 1; 3107 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3108 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3109 "unknown path selection algorithm: 0x%x\n", 3110 meshconf->conf_pselid); 3111 return 1; 3112 } 3113 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3114 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3115 "unknown path metric algorithm: 0x%x\n", 3116 meshconf->conf_pmetid); 3117 return 1; 3118 } 3119 if (meshconf->conf_ccid != 0) { 3120 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3121 "unknown congestion control algorithm: 0x%x\n", 3122 meshconf->conf_ccid); 3123 return 1; 3124 } 3125 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3126 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3127 "unknown sync algorithm: 0x%x\n", 3128 meshconf->conf_syncid); 3129 return 1; 3130 } 3131 if (meshconf->conf_authid != 0) { 3132 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3133 "unknown auth auth algorithm: 0x%x\n", 3134 meshconf->conf_pselid); 3135 return 1; 3136 } 3137 /* Not accepting peers */ 3138 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3139 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3140 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3141 return 1; 3142 } 3143 return 0; 3144 } 3145 3146 static int 3147 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3148 const uint8_t *ie) 3149 { 3150 const struct ieee80211_meshpeer_ie *meshpeer = 3151 (const struct ieee80211_meshpeer_ie *) ie; 3152 3153 if (meshpeer == NULL || 3154 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3155 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3156 return 1; 3157 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3158 IEEE80211_DPRINTF(vap, 3159 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3160 "Only MPM protocol is supported (proto: 0x%02X)", 3161 meshpeer->peer_proto); 3162 return 1; 3163 } 3164 switch (subtype) { 3165 case IEEE80211_ACTION_MESHPEERING_OPEN: 3166 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3167 return 1; 3168 break; 3169 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3170 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3171 return 1; 3172 break; 3173 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3174 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3175 return 1; 3176 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3177 meshpeer->peer_linkid != 0) 3178 return 1; 3179 if (meshpeer->peer_rcode == 0) 3180 return 1; 3181 break; 3182 } 3183 return 0; 3184 } 3185 3186 /* 3187 * Add a Mesh ID IE to a frame. 3188 */ 3189 uint8_t * 3190 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3191 { 3192 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3193 3194 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3195 3196 *frm++ = IEEE80211_ELEMID_MESHID; 3197 *frm++ = ms->ms_idlen; 3198 memcpy(frm, ms->ms_id, ms->ms_idlen); 3199 return frm + ms->ms_idlen; 3200 } 3201 3202 /* 3203 * Add a Mesh Configuration IE to a frame. 3204 * For now just use HWMP routing, Airtime link metric, Null Congestion 3205 * Signaling, Null Sync Protocol and Null Authentication. 3206 */ 3207 uint8_t * 3208 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3209 { 3210 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3211 uint16_t caps; 3212 3213 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3214 3215 *frm++ = IEEE80211_ELEMID_MESHCONF; 3216 *frm++ = IEEE80211_MESH_CONF_SZ; 3217 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3218 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3219 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3220 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3221 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3222 /* NB: set the number of neighbors before the rest */ 3223 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3224 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3225 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3226 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3227 frm += 1; 3228 caps = 0; 3229 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3230 caps |= IEEE80211_MESHCONF_CAP_AP; 3231 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3232 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3233 *frm++ = caps; 3234 return frm; 3235 } 3236 3237 /* 3238 * Add a Mesh Peer Management IE to a frame. 3239 */ 3240 uint8_t * 3241 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3242 uint16_t peerid, uint16_t reason) 3243 { 3244 3245 KASSERT(localid != 0, ("localid == 0")); 3246 3247 *frm++ = IEEE80211_ELEMID_MESHPEER; 3248 switch (subtype) { 3249 case IEEE80211_ACTION_MESHPEERING_OPEN: 3250 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3251 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3252 ADDSHORT(frm, localid); /* local ID */ 3253 break; 3254 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3255 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3256 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3257 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3258 ADDSHORT(frm, localid); /* local ID */ 3259 ADDSHORT(frm, peerid); /* peer ID */ 3260 break; 3261 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3262 if (peerid) 3263 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3264 else 3265 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3266 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3267 ADDSHORT(frm, localid); /* local ID */ 3268 if (peerid) 3269 ADDSHORT(frm, peerid); /* peer ID */ 3270 ADDSHORT(frm, reason); 3271 break; 3272 } 3273 return frm; 3274 } 3275 3276 /* 3277 * Compute an Airtime Link Metric for the link with this node. 3278 * 3279 * Based on Draft 3.0 spec (11B.10, p.149). 3280 */ 3281 /* 3282 * Max 802.11s overhead. 3283 */ 3284 #define IEEE80211_MESH_MAXOVERHEAD \ 3285 (sizeof(struct ieee80211_qosframe_addr4) \ 3286 + sizeof(struct ieee80211_meshcntl_ae10) \ 3287 + sizeof(struct llc) \ 3288 + IEEE80211_ADDR_LEN \ 3289 + IEEE80211_WEP_IVLEN \ 3290 + IEEE80211_WEP_KIDLEN \ 3291 + IEEE80211_WEP_CRCLEN \ 3292 + IEEE80211_WEP_MICLEN \ 3293 + IEEE80211_CRC_LEN) 3294 uint32_t 3295 mesh_airtime_calc(struct ieee80211_node *ni) 3296 { 3297 #define M_BITS 8 3298 #define S_FACTOR (2 * M_BITS) 3299 struct ieee80211com *ic = ni->ni_ic; 3300 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3301 const static int nbits = 8192 << M_BITS; 3302 uint32_t overhead, rate, errrate; 3303 uint64_t res; 3304 3305 /* Time to transmit a frame */ 3306 rate = ni->ni_txrate; 3307 overhead = ieee80211_compute_duration(ic->ic_rt, 3308 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3309 /* Error rate in percentage */ 3310 /* XXX assuming small failures are ok */ 3311 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + 3312 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) 3313 / 100; 3314 res = (overhead + (nbits / rate)) * 3315 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3316 3317 return (uint32_t)(res >> S_FACTOR); 3318 #undef M_BITS 3319 #undef S_FACTOR 3320 } 3321 3322 /* 3323 * Add a Mesh Link Metric report IE to a frame. 3324 */ 3325 uint8_t * 3326 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3327 { 3328 *frm++ = IEEE80211_ELEMID_MESHLINK; 3329 *frm++ = 5; 3330 *frm++ = flags; 3331 ADDWORD(frm, metric); 3332 return frm; 3333 } 3334 3335 /* 3336 * Add a Mesh Gate Announcement IE to a frame. 3337 */ 3338 uint8_t * 3339 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3340 { 3341 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3342 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3343 *frm++ = ie->gann_flags; 3344 *frm++ = ie->gann_hopcount; 3345 *frm++ = ie->gann_ttl; 3346 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3347 frm += 6; 3348 ADDWORD(frm, ie->gann_seq); 3349 ADDSHORT(frm, ie->gann_interval); 3350 return frm; 3351 } 3352 #undef ADDSHORT 3353 #undef ADDWORD 3354 3355 /* 3356 * Initialize any mesh-specific node state. 3357 */ 3358 void 3359 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3360 { 3361 ni->ni_flags |= IEEE80211_NODE_QOS; 3362 callout_init(&ni->ni_mltimer, 1); 3363 callout_init(&ni->ni_mlhtimer, 1); 3364 } 3365 3366 /* 3367 * Cleanup any mesh-specific node state. 3368 */ 3369 void 3370 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3371 { 3372 struct ieee80211vap *vap = ni->ni_vap; 3373 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3374 3375 callout_drain(&ni->ni_mltimer); 3376 callout_drain(&ni->ni_mlhtimer); 3377 /* NB: short-circuit callbacks after mesh_vdetach */ 3378 if (vap->iv_mesh != NULL) 3379 ms->ms_ppath->mpp_peerdown(ni); 3380 } 3381 3382 void 3383 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3384 { 3385 ni->ni_meshidlen = ie[1]; 3386 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3387 } 3388 3389 /* 3390 * Setup mesh-specific node state on neighbor discovery. 3391 */ 3392 void 3393 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3394 const struct ieee80211_frame *wh, 3395 const struct ieee80211_scanparams *sp) 3396 { 3397 ieee80211_parse_meshid(ni, sp->meshid); 3398 } 3399 3400 void 3401 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3402 struct ieee80211_beacon_offsets *bo) 3403 { 3404 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3405 3406 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3407 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3408 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3409 } 3410 } 3411 3412 static int 3413 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3414 { 3415 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3416 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3417 struct ieee80211_mesh_route *rt; 3418 struct ieee80211req_mesh_route *imr; 3419 size_t len, off; 3420 uint8_t *p; 3421 int error; 3422 3423 if (vap->iv_opmode != IEEE80211_M_MBSS) 3424 return ENOSYS; 3425 3426 error = 0; 3427 switch (ireq->i_type) { 3428 case IEEE80211_IOC_MESH_ID: 3429 ireq->i_len = ms->ms_idlen; 3430 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3431 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3432 break; 3433 case IEEE80211_IOC_MESH_AP: 3434 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3435 break; 3436 case IEEE80211_IOC_MESH_FWRD: 3437 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3438 break; 3439 case IEEE80211_IOC_MESH_GATE: 3440 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3441 break; 3442 case IEEE80211_IOC_MESH_TTL: 3443 ireq->i_val = ms->ms_ttl; 3444 break; 3445 case IEEE80211_IOC_MESH_RTCMD: 3446 switch (ireq->i_val) { 3447 case IEEE80211_MESH_RTCMD_LIST: 3448 len = 0; 3449 MESH_RT_LOCK(ms); 3450 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3451 len += sizeof(*imr); 3452 } 3453 MESH_RT_UNLOCK(ms); 3454 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3455 ireq->i_len = len; 3456 return ENOMEM; 3457 } 3458 ireq->i_len = len; 3459 /* XXX M_WAIT? */ 3460 p = IEEE80211_MALLOC(len, M_TEMP, 3461 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 3462 if (p == NULL) 3463 return ENOMEM; 3464 off = 0; 3465 MESH_RT_LOCK(ms); 3466 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3467 if (off >= len) 3468 break; 3469 imr = (struct ieee80211req_mesh_route *) 3470 (p + off); 3471 IEEE80211_ADDR_COPY(imr->imr_dest, 3472 rt->rt_dest); 3473 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3474 rt->rt_nexthop); 3475 imr->imr_metric = rt->rt_metric; 3476 imr->imr_nhops = rt->rt_nhops; 3477 imr->imr_lifetime = 3478 ieee80211_mesh_rt_update(rt, 0); 3479 imr->imr_lastmseq = rt->rt_lastmseq; 3480 imr->imr_flags = rt->rt_flags; /* last */ 3481 off += sizeof(*imr); 3482 } 3483 MESH_RT_UNLOCK(ms); 3484 error = copyout(p, (uint8_t *)ireq->i_data, 3485 ireq->i_len); 3486 IEEE80211_FREE(p, M_TEMP); 3487 break; 3488 case IEEE80211_MESH_RTCMD_FLUSH: 3489 case IEEE80211_MESH_RTCMD_ADD: 3490 case IEEE80211_MESH_RTCMD_DELETE: 3491 return EINVAL; 3492 default: 3493 return ENOSYS; 3494 } 3495 break; 3496 case IEEE80211_IOC_MESH_PR_METRIC: 3497 len = strlen(ms->ms_pmetric->mpm_descr); 3498 if (ireq->i_len < len) 3499 return EINVAL; 3500 ireq->i_len = len; 3501 error = copyout(ms->ms_pmetric->mpm_descr, 3502 (uint8_t *)ireq->i_data, len); 3503 break; 3504 case IEEE80211_IOC_MESH_PR_PATH: 3505 len = strlen(ms->ms_ppath->mpp_descr); 3506 if (ireq->i_len < len) 3507 return EINVAL; 3508 ireq->i_len = len; 3509 error = copyout(ms->ms_ppath->mpp_descr, 3510 (uint8_t *)ireq->i_data, len); 3511 break; 3512 default: 3513 return ENOSYS; 3514 } 3515 3516 return error; 3517 } 3518 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3519 3520 static int 3521 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3522 { 3523 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3524 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3525 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3526 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3527 int error; 3528 3529 if (vap->iv_opmode != IEEE80211_M_MBSS) 3530 return ENOSYS; 3531 3532 error = 0; 3533 switch (ireq->i_type) { 3534 case IEEE80211_IOC_MESH_ID: 3535 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3536 return EINVAL; 3537 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3538 if (error != 0) 3539 break; 3540 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3541 ms->ms_idlen = ireq->i_len; 3542 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3543 error = ENETRESET; 3544 break; 3545 case IEEE80211_IOC_MESH_AP: 3546 if (ireq->i_val) 3547 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3548 else 3549 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3550 error = ENETRESET; 3551 break; 3552 case IEEE80211_IOC_MESH_FWRD: 3553 if (ireq->i_val) 3554 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3555 else 3556 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3557 mesh_gatemode_setup(vap); 3558 break; 3559 case IEEE80211_IOC_MESH_GATE: 3560 if (ireq->i_val) 3561 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3562 else 3563 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3564 break; 3565 case IEEE80211_IOC_MESH_TTL: 3566 ms->ms_ttl = (uint8_t) ireq->i_val; 3567 break; 3568 case IEEE80211_IOC_MESH_RTCMD: 3569 switch (ireq->i_val) { 3570 case IEEE80211_MESH_RTCMD_LIST: 3571 return EINVAL; 3572 case IEEE80211_MESH_RTCMD_FLUSH: 3573 ieee80211_mesh_rt_flush(vap); 3574 break; 3575 case IEEE80211_MESH_RTCMD_ADD: 3576 error = copyin(ireq->i_data, tmpaddr, 3577 IEEE80211_ADDR_LEN); 3578 if (error != 0) 3579 break; 3580 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, tmpaddr) || 3581 IEEE80211_ADDR_EQ(broadcastaddr, tmpaddr)) 3582 return EINVAL; 3583 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3584 break; 3585 case IEEE80211_MESH_RTCMD_DELETE: 3586 error = copyin(ireq->i_data, tmpaddr, 3587 IEEE80211_ADDR_LEN); 3588 if (error != 0) 3589 break; 3590 ieee80211_mesh_rt_del(vap, tmpaddr); 3591 break; 3592 default: 3593 return ENOSYS; 3594 } 3595 break; 3596 case IEEE80211_IOC_MESH_PR_METRIC: 3597 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3598 if (error == 0) { 3599 error = mesh_select_proto_metric(vap, tmpproto); 3600 if (error == 0) 3601 error = ENETRESET; 3602 } 3603 break; 3604 case IEEE80211_IOC_MESH_PR_PATH: 3605 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3606 if (error == 0) { 3607 error = mesh_select_proto_path(vap, tmpproto); 3608 if (error == 0) 3609 error = ENETRESET; 3610 } 3611 break; 3612 default: 3613 return ENOSYS; 3614 } 3615 return error; 3616 } 3617 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3618