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 31 /* 32 * IEEE 802.11s Mesh Point (MBSS) support. 33 * 34 * Based on March 2009, D3.0 802.11s draft spec. 35 */ 36 #include "opt_inet.h" 37 #include "opt_wlan.h" 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/mbuf.h> 42 #include <sys/malloc.h> 43 #include <sys/kernel.h> 44 45 #include <sys/socket.h> 46 #include <sys/sockio.h> 47 #include <sys/endian.h> 48 #include <sys/errno.h> 49 #include <sys/proc.h> 50 #include <sys/sysctl.h> 51 52 #include <net/bpf.h> 53 #include <net/if.h> 54 #include <net/if_var.h> 55 #include <net/if_media.h> 56 #include <net/if_llc.h> 57 #include <net/if_private.h> 58 #include <net/ethernet.h> 59 60 #include <net80211/ieee80211_var.h> 61 #include <net80211/ieee80211_action.h> 62 #ifdef IEEE80211_SUPPORT_SUPERG 63 #include <net80211/ieee80211_superg.h> 64 #endif 65 #include <net80211/ieee80211_input.h> 66 #include <net80211/ieee80211_mesh.h> 67 68 static void mesh_rt_flush_invalid(struct ieee80211vap *); 69 static int mesh_select_proto_path(struct ieee80211vap *, const char *); 70 static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 71 static void mesh_vattach(struct ieee80211vap *); 72 static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 73 static void mesh_rt_cleanup_cb(void *); 74 static void mesh_gatemode_setup(struct ieee80211vap *); 75 static void mesh_gatemode_cb(void *); 76 static void mesh_linkchange(struct ieee80211_node *, 77 enum ieee80211_mesh_mlstate); 78 static void mesh_checkid(void *, struct ieee80211_node *); 79 static uint32_t mesh_generateid(struct ieee80211vap *); 80 static int mesh_checkpseq(struct ieee80211vap *, 81 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 82 static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, 83 struct ieee80211_mesh_route *); 84 static void mesh_forward(struct ieee80211vap *, struct mbuf *, 85 const struct ieee80211_meshcntl *); 86 static int mesh_input(struct ieee80211_node *, struct mbuf *, 87 const struct ieee80211_rx_stats *rxs, int, int); 88 static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 89 const struct ieee80211_rx_stats *rxs, int, int); 90 static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 91 static void mesh_peer_timeout_setup(struct ieee80211_node *); 92 static void mesh_peer_timeout_backoff(struct ieee80211_node *); 93 static void mesh_peer_timeout_cb(void *); 94 static __inline void 95 mesh_peer_timeout_stop(struct ieee80211_node *); 96 static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 97 static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 98 static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 99 const uint8_t *); 100 uint32_t mesh_airtime_calc(struct ieee80211_node *); 101 102 /* 103 * Timeout values come from the specification and are in milliseconds. 104 */ 105 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 106 "IEEE 802.11s parameters"); 107 static int ieee80211_mesh_gateint = -1; 108 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, 109 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 110 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 111 "mesh gate interval (ms)"); 112 static int ieee80211_mesh_retrytimeout = -1; 113 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, 114 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 115 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 116 "Retry timeout (msec)"); 117 static int ieee80211_mesh_holdingtimeout = -1; 118 119 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, 120 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 121 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 122 "Holding state timeout (msec)"); 123 static int ieee80211_mesh_confirmtimeout = -1; 124 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, 125 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 126 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 127 "Confirm state timeout (msec)"); 128 static int ieee80211_mesh_backofftimeout = -1; 129 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, 130 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 131 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 132 "Backoff timeout (msec). This is to throutles peering forever when " 133 "not receiving answer or is rejected by a neighbor"); 134 static int ieee80211_mesh_maxretries = 2; 135 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW, 136 &ieee80211_mesh_maxretries, 0, 137 "Maximum retries during peer link establishment"); 138 static int ieee80211_mesh_maxholding = 2; 139 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW, 140 &ieee80211_mesh_maxholding, 0, 141 "Maximum times we are allowed to transition to HOLDING state before " 142 "backinoff during peer link establishment"); 143 144 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 145 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 146 147 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 148 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 149 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 150 static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 151 static ieee80211_recv_action_func mesh_recv_action_meshgate; 152 153 static ieee80211_send_action_func mesh_send_action_meshpeering_open; 154 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 155 static ieee80211_send_action_func mesh_send_action_meshpeering_close; 156 static ieee80211_send_action_func mesh_send_action_meshlmetric; 157 static ieee80211_send_action_func mesh_send_action_meshgate; 158 159 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 160 .mpm_descr = "AIRTIME", 161 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 162 .mpm_metric = mesh_airtime_calc, 163 }; 164 165 static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 166 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 167 168 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 169 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 170 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 171 172 /* The longer one of the lifetime should be stored as new lifetime */ 173 #define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 174 175 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 176 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 177 178 /* 179 * Helper functions to manipulate the Mesh routing table. 180 */ 181 182 static struct ieee80211_mesh_route * 183 mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 184 const uint8_t dest[IEEE80211_ADDR_LEN]) 185 { 186 struct ieee80211_mesh_route *rt; 187 188 MESH_RT_LOCK_ASSERT(ms); 189 190 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 191 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 192 return rt; 193 } 194 return NULL; 195 } 196 197 static struct ieee80211_mesh_route * 198 mesh_rt_add_locked(struct ieee80211vap *vap, 199 const uint8_t dest[IEEE80211_ADDR_LEN]) 200 { 201 struct ieee80211_mesh_state *ms = vap->iv_mesh; 202 struct ieee80211_mesh_route *rt; 203 204 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 205 ("%s: adding broadcast to the routing table", __func__)); 206 207 MESH_RT_LOCK_ASSERT(ms); 208 209 rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) + 210 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, 211 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 212 if (rt != NULL) { 213 rt->rt_vap = vap; 214 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 215 rt->rt_priv = (void *)ALIGN(&rt[1]); 216 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT"); 217 callout_init(&rt->rt_discovery, 1); 218 rt->rt_updtime = ticks; /* create time */ 219 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 220 } 221 return rt; 222 } 223 224 struct ieee80211_mesh_route * 225 ieee80211_mesh_rt_find(struct ieee80211vap *vap, 226 const uint8_t dest[IEEE80211_ADDR_LEN]) 227 { 228 struct ieee80211_mesh_state *ms = vap->iv_mesh; 229 struct ieee80211_mesh_route *rt; 230 231 MESH_RT_LOCK(ms); 232 rt = mesh_rt_find_locked(ms, dest); 233 MESH_RT_UNLOCK(ms); 234 return rt; 235 } 236 237 struct ieee80211_mesh_route * 238 ieee80211_mesh_rt_add(struct ieee80211vap *vap, 239 const uint8_t dest[IEEE80211_ADDR_LEN]) 240 { 241 struct ieee80211_mesh_state *ms = vap->iv_mesh; 242 struct ieee80211_mesh_route *rt; 243 244 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 245 ("%s: duplicate entry in the routing table", __func__)); 246 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 247 ("%s: adding self to the routing table", __func__)); 248 249 MESH_RT_LOCK(ms); 250 rt = mesh_rt_add_locked(vap, dest); 251 MESH_RT_UNLOCK(ms); 252 return rt; 253 } 254 255 /* 256 * Update the route lifetime and returns the updated lifetime. 257 * If new_lifetime is zero and route is timedout it will be invalidated. 258 * new_lifetime is in msec 259 */ 260 int 261 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 262 { 263 int timesince, now; 264 uint32_t lifetime = 0; 265 266 KASSERT(rt != NULL, ("route is NULL")); 267 268 now = ticks; 269 MESH_RT_ENTRY_LOCK(rt); 270 271 /* dont clobber a proxy entry gated by us */ 272 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 273 MESH_RT_ENTRY_UNLOCK(rt); 274 return rt->rt_lifetime; 275 } 276 277 timesince = ticks_to_msecs(now - rt->rt_updtime); 278 rt->rt_updtime = now; 279 if (timesince >= rt->rt_lifetime) { 280 if (new_lifetime != 0) { 281 rt->rt_lifetime = new_lifetime; 282 } 283 else { 284 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 285 rt->rt_lifetime = 0; 286 } 287 } else { 288 /* update what is left of lifetime */ 289 rt->rt_lifetime = rt->rt_lifetime - timesince; 290 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 291 new_lifetime, rt->rt_lifetime); 292 } 293 lifetime = rt->rt_lifetime; 294 MESH_RT_ENTRY_UNLOCK(rt); 295 296 return lifetime; 297 } 298 299 /* 300 * Add a proxy route (as needed) for the specified destination. 301 */ 302 void 303 ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 304 const uint8_t dest[IEEE80211_ADDR_LEN]) 305 { 306 struct ieee80211_mesh_state *ms = vap->iv_mesh; 307 struct ieee80211_mesh_route *rt; 308 309 MESH_RT_LOCK(ms); 310 rt = mesh_rt_find_locked(ms, dest); 311 if (rt == NULL) { 312 rt = mesh_rt_add_locked(vap, dest); 313 if (rt == NULL) { 314 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 315 "%s", "unable to add proxy entry"); 316 vap->iv_stats.is_mesh_rtaddfailed++; 317 } else { 318 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 319 "%s", "add proxy entry"); 320 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 321 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 322 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 323 | IEEE80211_MESHRT_FLAGS_PROXY; 324 } 325 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 326 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 327 ("no proxy flag for poxy entry")); 328 struct ieee80211com *ic = vap->iv_ic; 329 /* 330 * Fix existing entry created by received frames from 331 * stations that have some memory of dest. We also 332 * flush any frames held on the staging queue; delivering 333 * them is too much trouble right now. 334 */ 335 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 336 "%s", "fix proxy entry"); 337 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 338 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 339 | IEEE80211_MESHRT_FLAGS_PROXY; 340 /* XXX belongs in hwmp */ 341 ieee80211_ageq_drain_node(&ic->ic_stageq, 342 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 343 /* XXX stat? */ 344 } 345 MESH_RT_UNLOCK(ms); 346 } 347 348 static __inline void 349 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 350 { 351 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 352 /* 353 * Grab the lock before destroying it, to be sure no one else 354 * is holding the route. 355 */ 356 MESH_RT_ENTRY_LOCK(rt); 357 callout_drain(&rt->rt_discovery); 358 MESH_RT_ENTRY_LOCK_DESTROY(rt); 359 IEEE80211_FREE(rt, M_80211_MESH_RT); 360 } 361 362 void 363 ieee80211_mesh_rt_del(struct ieee80211vap *vap, 364 const uint8_t dest[IEEE80211_ADDR_LEN]) 365 { 366 struct ieee80211_mesh_state *ms = vap->iv_mesh; 367 struct ieee80211_mesh_route *rt, *next; 368 369 MESH_RT_LOCK(ms); 370 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 371 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 372 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 373 ms->ms_ppath->mpp_senderror(vap, dest, rt, 374 IEEE80211_REASON_MESH_PERR_NO_PROXY); 375 } else { 376 ms->ms_ppath->mpp_senderror(vap, dest, rt, 377 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 378 } 379 mesh_rt_del(ms, rt); 380 MESH_RT_UNLOCK(ms); 381 return; 382 } 383 } 384 MESH_RT_UNLOCK(ms); 385 } 386 387 void 388 ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 389 { 390 struct ieee80211_mesh_state *ms = vap->iv_mesh; 391 struct ieee80211_mesh_route *rt, *next; 392 393 if (ms == NULL) 394 return; 395 MESH_RT_LOCK(ms); 396 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 397 mesh_rt_del(ms, rt); 398 MESH_RT_UNLOCK(ms); 399 } 400 401 void 402 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 403 const uint8_t peer[IEEE80211_ADDR_LEN]) 404 { 405 struct ieee80211_mesh_state *ms = vap->iv_mesh; 406 struct ieee80211_mesh_route *rt, *next; 407 408 MESH_RT_LOCK(ms); 409 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 410 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 411 mesh_rt_del(ms, rt); 412 } 413 MESH_RT_UNLOCK(ms); 414 } 415 416 /* 417 * Flush expired routing entries, i.e. those in invalid state for 418 * some time. 419 */ 420 static void 421 mesh_rt_flush_invalid(struct ieee80211vap *vap) 422 { 423 struct ieee80211_mesh_state *ms = vap->iv_mesh; 424 struct ieee80211_mesh_route *rt, *next; 425 426 if (ms == NULL) 427 return; 428 MESH_RT_LOCK(ms); 429 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 430 /* Discover paths will be deleted by their own callout */ 431 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 432 continue; 433 ieee80211_mesh_rt_update(rt, 0); 434 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 435 mesh_rt_del(ms, rt); 436 } 437 MESH_RT_UNLOCK(ms); 438 } 439 440 int 441 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 442 { 443 int i, firstempty = -1; 444 445 for (i = 0; i < nitems(mesh_proto_paths); i++) { 446 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 447 IEEE80211_MESH_PROTO_DSZ) == 0) 448 return EEXIST; 449 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 450 firstempty = i; 451 } 452 if (firstempty < 0) 453 return ENOSPC; 454 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 455 mesh_proto_paths[firstempty].mpp_active = 1; 456 return 0; 457 } 458 459 int 460 ieee80211_mesh_register_proto_metric(const struct 461 ieee80211_mesh_proto_metric *mpm) 462 { 463 int i, firstempty = -1; 464 465 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 466 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 467 IEEE80211_MESH_PROTO_DSZ) == 0) 468 return EEXIST; 469 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 470 firstempty = i; 471 } 472 if (firstempty < 0) 473 return ENOSPC; 474 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 475 mesh_proto_metrics[firstempty].mpm_active = 1; 476 return 0; 477 } 478 479 static int 480 mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 481 { 482 struct ieee80211_mesh_state *ms = vap->iv_mesh; 483 int i; 484 485 for (i = 0; i < nitems(mesh_proto_paths); i++) { 486 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 487 ms->ms_ppath = &mesh_proto_paths[i]; 488 return 0; 489 } 490 } 491 return ENOENT; 492 } 493 494 static int 495 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 496 { 497 struct ieee80211_mesh_state *ms = vap->iv_mesh; 498 int i; 499 500 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 501 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 502 ms->ms_pmetric = &mesh_proto_metrics[i]; 503 return 0; 504 } 505 } 506 return ENOENT; 507 } 508 509 static void 510 mesh_gatemode_setup(struct ieee80211vap *vap) 511 { 512 struct ieee80211_mesh_state *ms = vap->iv_mesh; 513 514 /* 515 * NB: When a mesh gate is running as a ROOT it shall 516 * not send out periodic GANNs but instead mark the 517 * mesh gate flag for the corresponding proactive PREQ 518 * and RANN frames. 519 */ 520 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 521 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 522 callout_drain(&ms->ms_gatetimer); 523 return ; 524 } 525 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 526 mesh_gatemode_cb, vap); 527 } 528 529 static void 530 mesh_gatemode_cb(void *arg) 531 { 532 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 533 struct ieee80211_mesh_state *ms = vap->iv_mesh; 534 struct ieee80211_meshgann_ie gann; 535 536 gann.gann_flags = 0; /* Reserved */ 537 gann.gann_hopcount = 0; 538 gann.gann_ttl = ms->ms_ttl; 539 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 540 gann.gann_seq = ms->ms_gateseq++; 541 gann.gann_interval = ieee80211_mesh_gateint; 542 543 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 544 "send broadcast GANN (seq %u)", gann.gann_seq); 545 546 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 547 IEEE80211_ACTION_MESH_GANN, &gann); 548 mesh_gatemode_setup(vap); 549 } 550 551 static void 552 ieee80211_mesh_init(void) 553 { 554 555 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 556 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 557 558 /* 559 * Setup mesh parameters that depends on the clock frequency. 560 */ 561 ieee80211_mesh_gateint = msecs_to_ticks(10000); 562 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 563 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 564 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 565 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 566 567 /* 568 * Register action frame handlers. 569 */ 570 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 571 IEEE80211_ACTION_MESHPEERING_OPEN, 572 mesh_recv_action_meshpeering_open); 573 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 574 IEEE80211_ACTION_MESHPEERING_CONFIRM, 575 mesh_recv_action_meshpeering_confirm); 576 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 577 IEEE80211_ACTION_MESHPEERING_CLOSE, 578 mesh_recv_action_meshpeering_close); 579 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 580 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 581 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 582 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 583 584 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 585 IEEE80211_ACTION_MESHPEERING_OPEN, 586 mesh_send_action_meshpeering_open); 587 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 588 IEEE80211_ACTION_MESHPEERING_CONFIRM, 589 mesh_send_action_meshpeering_confirm); 590 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 591 IEEE80211_ACTION_MESHPEERING_CLOSE, 592 mesh_send_action_meshpeering_close); 593 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 594 IEEE80211_ACTION_MESH_LMETRIC, 595 mesh_send_action_meshlmetric); 596 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 597 IEEE80211_ACTION_MESH_GANN, 598 mesh_send_action_meshgate); 599 600 /* 601 * Register Airtime Link Metric. 602 */ 603 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 604 605 } 606 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 607 608 void 609 ieee80211_mesh_attach(struct ieee80211com *ic) 610 { 611 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 612 } 613 614 void 615 ieee80211_mesh_detach(struct ieee80211com *ic) 616 { 617 } 618 619 static void 620 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 621 { 622 struct ieee80211com *ic = ni->ni_ic; 623 uint16_t args[3]; 624 625 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 626 args[0] = ni->ni_mlpid; 627 args[1] = ni->ni_mllid; 628 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 629 ieee80211_send_action(ni, 630 IEEE80211_ACTION_CAT_SELF_PROT, 631 IEEE80211_ACTION_MESHPEERING_CLOSE, 632 args); 633 } 634 callout_drain(&ni->ni_mltimer); 635 /* XXX belongs in hwmp */ 636 ieee80211_ageq_drain_node(&ic->ic_stageq, 637 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 638 } 639 640 static void 641 mesh_vdetach(struct ieee80211vap *vap) 642 { 643 struct ieee80211_mesh_state *ms = vap->iv_mesh; 644 645 callout_drain(&ms->ms_cleantimer); 646 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 647 NULL); 648 ieee80211_mesh_rt_flush(vap); 649 MESH_RT_LOCK_DESTROY(ms); 650 ms->ms_ppath->mpp_vdetach(vap); 651 IEEE80211_FREE(vap->iv_mesh, M_80211_VAP); 652 vap->iv_mesh = NULL; 653 } 654 655 static void 656 mesh_vattach(struct ieee80211vap *vap) 657 { 658 struct ieee80211_mesh_state *ms; 659 vap->iv_newstate = mesh_newstate; 660 vap->iv_input = mesh_input; 661 vap->iv_opdetach = mesh_vdetach; 662 vap->iv_recv_mgmt = mesh_recv_mgmt; 663 vap->iv_recv_ctl = mesh_recv_ctl; 664 ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 665 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 666 if (ms == NULL) { 667 printf("%s: couldn't alloc MBSS state\n", __func__); 668 return; 669 } 670 vap->iv_mesh = ms; 671 ms->ms_seq = 0; 672 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 673 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 674 TAILQ_INIT(&ms->ms_known_gates); 675 TAILQ_INIT(&ms->ms_routes); 676 MESH_RT_LOCK_INIT(ms, "MBSS"); 677 callout_init(&ms->ms_cleantimer, 1); 678 callout_init(&ms->ms_gatetimer, 1); 679 ms->ms_gateseq = 0; 680 mesh_select_proto_metric(vap, "AIRTIME"); 681 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 682 mesh_select_proto_path(vap, "HWMP"); 683 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 684 ms->ms_ppath->mpp_vattach(vap); 685 } 686 687 /* 688 * IEEE80211_M_MBSS vap state machine handler. 689 */ 690 static int 691 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 692 { 693 struct ieee80211_mesh_state *ms = vap->iv_mesh; 694 struct ieee80211com *ic = vap->iv_ic; 695 struct ieee80211_node *ni; 696 enum ieee80211_state ostate; 697 698 IEEE80211_LOCK_ASSERT(ic); 699 700 ostate = vap->iv_state; 701 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 702 __func__, ieee80211_state_name[ostate], 703 ieee80211_state_name[nstate], arg); 704 vap->iv_state = nstate; /* state transition */ 705 if (ostate != IEEE80211_S_SCAN) 706 ieee80211_cancel_scan(vap); /* background scan */ 707 ni = vap->iv_bss; /* NB: no reference held */ 708 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 709 callout_drain(&ms->ms_cleantimer); 710 callout_drain(&ms->ms_gatetimer); 711 } 712 switch (nstate) { 713 case IEEE80211_S_INIT: 714 switch (ostate) { 715 case IEEE80211_S_SCAN: 716 ieee80211_cancel_scan(vap); 717 break; 718 case IEEE80211_S_CAC: 719 ieee80211_dfs_cac_stop(vap); 720 break; 721 case IEEE80211_S_RUN: 722 ieee80211_iterate_nodes(&ic->ic_sta, 723 mesh_vdetach_peers, NULL); 724 break; 725 default: 726 break; 727 } 728 if (ostate != IEEE80211_S_INIT) { 729 /* NB: optimize INIT -> INIT case */ 730 ieee80211_reset_bss(vap); 731 ieee80211_mesh_rt_flush(vap); 732 } 733 break; 734 case IEEE80211_S_SCAN: 735 switch (ostate) { 736 case IEEE80211_S_INIT: 737 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 738 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 739 ms->ms_idlen != 0) { 740 /* 741 * Already have a channel and a mesh ID; bypass 742 * the scan and startup immediately. 743 */ 744 ieee80211_create_ibss(vap, vap->iv_des_chan); 745 break; 746 } 747 /* 748 * Initiate a scan. We can come here as a result 749 * of an IEEE80211_IOC_SCAN_REQ too in which case 750 * the vap will be marked with IEEE80211_FEXT_SCANREQ 751 * and the scan request parameters will be present 752 * in iv_scanreq. Otherwise we do the default. 753 */ 754 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 755 ieee80211_check_scan(vap, 756 vap->iv_scanreq_flags, 757 vap->iv_scanreq_duration, 758 vap->iv_scanreq_mindwell, 759 vap->iv_scanreq_maxdwell, 760 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 761 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 762 } else 763 ieee80211_check_scan_current(vap); 764 break; 765 default: 766 break; 767 } 768 break; 769 case IEEE80211_S_CAC: 770 /* 771 * Start CAC on a DFS channel. We come here when starting 772 * a bss on a DFS channel (see ieee80211_create_ibss). 773 */ 774 ieee80211_dfs_cac_start(vap); 775 break; 776 case IEEE80211_S_RUN: 777 switch (ostate) { 778 case IEEE80211_S_INIT: 779 /* 780 * Already have a channel; bypass the 781 * scan and startup immediately. 782 * Note that ieee80211_create_ibss will call 783 * back to do a RUN->RUN state change. 784 */ 785 ieee80211_create_ibss(vap, 786 ieee80211_ht_adjust_channel(ic, 787 ic->ic_curchan, vap->iv_flags_ht)); 788 /* NB: iv_bss is changed on return */ 789 break; 790 case IEEE80211_S_CAC: 791 /* 792 * NB: This is the normal state change when CAC 793 * expires and no radar was detected; no need to 794 * clear the CAC timer as it's already expired. 795 */ 796 /* fall thru... */ 797 case IEEE80211_S_CSA: 798 #if 0 799 /* 800 * Shorten inactivity timer of associated stations 801 * to weed out sta's that don't follow a CSA. 802 */ 803 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 804 #endif 805 /* 806 * Update bss node channel to reflect where 807 * we landed after CSA. 808 */ 809 ieee80211_node_set_chan(ni, 810 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 811 ieee80211_htchanflags(ni->ni_chan))); 812 /* XXX bypass debug msgs */ 813 break; 814 case IEEE80211_S_SCAN: 815 case IEEE80211_S_RUN: 816 #ifdef IEEE80211_DEBUG 817 if (ieee80211_msg_debug(vap)) { 818 ieee80211_note(vap, 819 "synchronized with %s meshid ", 820 ether_sprintf(ni->ni_meshid)); 821 ieee80211_print_essid(ni->ni_meshid, 822 ni->ni_meshidlen); 823 /* XXX MCS/HT */ 824 printf(" channel %d\n", 825 ieee80211_chan2ieee(ic, ic->ic_curchan)); 826 } 827 #endif 828 break; 829 default: 830 break; 831 } 832 ieee80211_node_authorize(ni); 833 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 834 mesh_rt_cleanup_cb, vap); 835 mesh_gatemode_setup(vap); 836 break; 837 default: 838 break; 839 } 840 /* NB: ostate not nstate */ 841 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 842 return 0; 843 } 844 845 static void 846 mesh_rt_cleanup_cb(void *arg) 847 { 848 struct ieee80211vap *vap = arg; 849 struct ieee80211_mesh_state *ms = vap->iv_mesh; 850 851 mesh_rt_flush_invalid(vap); 852 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 853 mesh_rt_cleanup_cb, vap); 854 } 855 856 /* 857 * Mark a mesh STA as gate and return a pointer to it. 858 * If this is first time, we create a new gate route. 859 * Always update the path route to this mesh gate. 860 */ 861 struct ieee80211_mesh_gate_route * 862 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 863 struct ieee80211_mesh_route *rt) 864 { 865 struct ieee80211_mesh_state *ms = vap->iv_mesh; 866 struct ieee80211_mesh_gate_route *gr = NULL, *next; 867 int found = 0; 868 869 MESH_RT_LOCK(ms); 870 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 871 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 872 found = 1; 873 break; 874 } 875 } 876 877 if (!found) { 878 /* New mesh gate add it to known table. */ 879 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 880 "%s", "stored new gate information from pro-PREQ."); 881 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 882 M_80211_MESH_GT_RT, 883 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 884 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 885 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 886 } 887 gr->gr_route = rt; 888 /* TODO: link from path route to gate route */ 889 MESH_RT_UNLOCK(ms); 890 891 return gr; 892 } 893 894 /* 895 * Helper function to note the Mesh Peer Link FSM change. 896 */ 897 static void 898 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 899 { 900 struct ieee80211vap *vap = ni->ni_vap; 901 struct ieee80211_mesh_state *ms = vap->iv_mesh; 902 #ifdef IEEE80211_DEBUG 903 static const char *meshlinkstates[] = { 904 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 905 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 906 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 907 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 908 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 909 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 910 }; 911 #endif 912 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 913 ni, "peer link: %s -> %s", 914 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 915 916 /* track neighbor count */ 917 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 918 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 919 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 920 ms->ms_neighbors++; 921 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 922 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 923 state != IEEE80211_NODE_MESH_ESTABLISHED) { 924 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 925 ms->ms_neighbors--; 926 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 927 } 928 ni->ni_mlstate = state; 929 switch (state) { 930 case IEEE80211_NODE_MESH_HOLDING: 931 ms->ms_ppath->mpp_peerdown(ni); 932 break; 933 case IEEE80211_NODE_MESH_ESTABLISHED: 934 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 935 break; 936 default: 937 break; 938 } 939 } 940 941 /* 942 * Helper function to generate a unique local ID required for mesh 943 * peer establishment. 944 */ 945 static void 946 mesh_checkid(void *arg, struct ieee80211_node *ni) 947 { 948 uint16_t *r = arg; 949 950 if (*r == ni->ni_mllid) 951 *(uint16_t *)arg = 0; 952 } 953 954 static uint32_t 955 mesh_generateid(struct ieee80211vap *vap) 956 { 957 int maxiter = 4; 958 uint16_t r; 959 960 do { 961 net80211_get_random_bytes(&r, 2); 962 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 963 maxiter--; 964 } while (r == 0 && maxiter > 0); 965 return r; 966 } 967 968 /* 969 * Verifies if we already received this packet by checking its 970 * sequence number. 971 * Returns 0 if the frame is to be accepted, 1 otherwise. 972 */ 973 static int 974 mesh_checkpseq(struct ieee80211vap *vap, 975 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 976 { 977 struct ieee80211_mesh_route *rt; 978 979 rt = ieee80211_mesh_rt_find(vap, source); 980 if (rt == NULL) { 981 rt = ieee80211_mesh_rt_add(vap, source); 982 if (rt == NULL) { 983 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 984 "%s", "add mcast route failed"); 985 vap->iv_stats.is_mesh_rtaddfailed++; 986 return 1; 987 } 988 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 989 "add mcast route, mesh seqno %d", seq); 990 rt->rt_lastmseq = seq; 991 return 0; 992 } 993 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 994 return 1; 995 } else { 996 rt->rt_lastmseq = seq; 997 return 0; 998 } 999 } 1000 1001 /* 1002 * Iterate the routing table and locate the next hop. 1003 */ 1004 struct ieee80211_node * 1005 ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1006 const uint8_t dest[IEEE80211_ADDR_LEN]) 1007 { 1008 struct ieee80211_mesh_route *rt; 1009 1010 rt = ieee80211_mesh_rt_find(vap, dest); 1011 if (rt == NULL) 1012 return NULL; 1013 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1014 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1015 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1016 /* XXX stat */ 1017 return NULL; 1018 } 1019 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1020 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1021 if (rt == NULL) return NULL; 1022 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1023 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1024 "%s: meshgate !valid, flags 0x%x", __func__, 1025 rt->rt_flags); 1026 /* XXX stat */ 1027 return NULL; 1028 } 1029 } 1030 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1031 } 1032 1033 static void 1034 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1035 struct ieee80211_mesh_route *rt_gate) 1036 { 1037 struct ifnet *ifp = vap->iv_ifp; 1038 struct ieee80211_node *ni; 1039 1040 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1041 1042 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1043 if (ni == NULL) { 1044 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1045 m_freem(m); 1046 return; 1047 } 1048 1049 /* 1050 * Send through the VAP packet transmit path. 1051 * This consumes the node ref grabbed above and 1052 * the mbuf, regardless of whether there's a problem 1053 * or not. 1054 */ 1055 (void) ieee80211_vap_pkt_send_dest(vap, m, ni); 1056 } 1057 1058 /* 1059 * Forward the queued frames to known valid mesh gates. 1060 * Assume destination to be outside the MBSS (i.e. proxy entry), 1061 * If no valid mesh gates are known silently discard queued frames. 1062 * After transmitting frames to all known valid mesh gates, this route 1063 * will be marked invalid, and a new path discovery will happen in the hopes 1064 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1065 */ 1066 void 1067 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1068 struct ieee80211_mesh_route *rt_dest) 1069 { 1070 struct ieee80211com *ic = vap->iv_ic; 1071 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1072 struct ieee80211_mesh_route *rt_gate; 1073 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1074 struct mbuf *m, *mcopy, *next; 1075 1076 IEEE80211_TX_UNLOCK_ASSERT(ic); 1077 1078 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1079 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1080 1081 /* XXX: send to more than one valid mash gate */ 1082 MESH_RT_LOCK(ms); 1083 1084 m = ieee80211_ageq_remove(&ic->ic_stageq, 1085 (struct ieee80211_node *)(uintptr_t) 1086 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1087 1088 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1089 rt_gate = gr->gr_route; 1090 if (rt_gate == NULL) { 1091 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1092 rt_dest->rt_dest, 1093 "mesh gate with no path %6D", 1094 gr->gr_addr, ":"); 1095 continue; 1096 } 1097 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1098 continue; 1099 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1100 ("route not marked as a mesh gate")); 1101 KASSERT((rt_gate->rt_flags & 1102 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1103 ("found mesh gate that is also marked porxy")); 1104 /* 1105 * convert route to a proxy route gated by the current 1106 * mesh gate, this is needed so encap can built data 1107 * frame with correct address. 1108 */ 1109 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1110 IEEE80211_MESHRT_FLAGS_VALID; 1111 rt_dest->rt_ext_seq = 1; /* random value */ 1112 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1113 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1114 rt_dest->rt_metric = rt_gate->rt_metric; 1115 rt_dest->rt_nhops = rt_gate->rt_nhops; 1116 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1117 MESH_RT_UNLOCK(ms); 1118 /* XXX: lock?? */ 1119 mcopy = m_dup(m, IEEE80211_M_NOWAIT); 1120 for (; mcopy != NULL; mcopy = next) { 1121 next = mcopy->m_nextpkt; 1122 mcopy->m_nextpkt = NULL; 1123 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1124 rt_dest->rt_dest, 1125 "flush queued frame %p len %d", mcopy, 1126 mcopy->m_pkthdr.len); 1127 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1128 } 1129 MESH_RT_LOCK(ms); 1130 } 1131 rt_dest->rt_flags = 0; /* Mark invalid */ 1132 m_freem(m); 1133 MESH_RT_UNLOCK(ms); 1134 } 1135 1136 /* 1137 * Forward the specified frame. 1138 * Decrement the TTL and set TA to our MAC address. 1139 */ 1140 static void 1141 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1142 const struct ieee80211_meshcntl *mc) 1143 { 1144 struct ieee80211com *ic = vap->iv_ic; 1145 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1146 struct ifnet *ifp = vap->iv_ifp; 1147 const struct ieee80211_frame *wh = 1148 mtod(m, const struct ieee80211_frame *); 1149 struct mbuf *mcopy; 1150 struct ieee80211_meshcntl *mccopy; 1151 struct ieee80211_frame *whcopy; 1152 struct ieee80211_node *ni; 1153 int err; 1154 1155 /* This is called from the RX path - don't hold this lock */ 1156 IEEE80211_TX_UNLOCK_ASSERT(ic); 1157 1158 /* 1159 * mesh ttl of 1 means we are the last one receiving it, 1160 * according to amendment we decrement and then check if 1161 * 0, if so we dont forward. 1162 */ 1163 if (mc->mc_ttl < 1) { 1164 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1165 "%s", "frame not fwd'd, ttl 1"); 1166 vap->iv_stats.is_mesh_fwd_ttl++; 1167 return; 1168 } 1169 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1170 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1171 "%s", "frame not fwd'd, fwding disabled"); 1172 vap->iv_stats.is_mesh_fwd_disabled++; 1173 return; 1174 } 1175 mcopy = m_dup(m, IEEE80211_M_NOWAIT); 1176 if (mcopy == NULL) { 1177 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1178 "%s", "frame not fwd'd, cannot dup"); 1179 vap->iv_stats.is_mesh_fwd_nobuf++; 1180 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1181 return; 1182 } 1183 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1184 sizeof(struct ieee80211_meshcntl)); 1185 if (mcopy == NULL) { 1186 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1187 "%s", "frame not fwd'd, too short"); 1188 vap->iv_stats.is_mesh_fwd_tooshort++; 1189 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1190 m_freem(mcopy); 1191 return; 1192 } 1193 whcopy = mtod(mcopy, struct ieee80211_frame *); 1194 mccopy = (struct ieee80211_meshcntl *) 1195 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1196 /* XXX clear other bits? */ 1197 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1198 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1199 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1200 ni = ieee80211_ref_node(vap->iv_bss); 1201 mcopy->m_flags |= M_MCAST; 1202 } else { 1203 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1204 if (ni == NULL) { 1205 /* 1206 * [Optional] any of the following three actions: 1207 * o silently discard 1208 * o trigger a path discovery 1209 * o inform TA that meshDA is unknown. 1210 */ 1211 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1212 "%s", "frame not fwd'd, no path"); 1213 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1214 IEEE80211_REASON_MESH_PERR_NO_FI); 1215 vap->iv_stats.is_mesh_fwd_nopath++; 1216 m_freem(mcopy); 1217 return; 1218 } 1219 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1220 } 1221 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1222 mccopy->mc_ttl--; 1223 1224 /* XXX calculate priority so drivers can find the tx queue */ 1225 M_WME_SETAC(mcopy, WME_AC_BE); 1226 1227 /* XXX do we know m_nextpkt is NULL? */ 1228 MPASS((mcopy->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0); 1229 mcopy->m_pkthdr.rcvif = (void *) ni; 1230 1231 /* 1232 * XXX this bypasses all of the VAP TX handling; it passes frames 1233 * directly to the parent interface. 1234 * 1235 * Because of this, there's no TX lock being held as there's no 1236 * encaps state being used. 1237 * 1238 * Doing a direct parent transmit may not be the correct thing 1239 * to do here; we'll have to re-think this soon. 1240 */ 1241 IEEE80211_TX_LOCK(ic); 1242 err = ieee80211_parent_xmitpkt(ic, mcopy); 1243 IEEE80211_TX_UNLOCK(ic); 1244 if (!err) 1245 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1246 } 1247 1248 static struct mbuf * 1249 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1250 { 1251 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1252 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1253 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1254 sizeof(struct ieee80211_meshcntl_ae10)]; 1255 const struct ieee80211_qosframe_addr4 *wh; 1256 const struct ieee80211_meshcntl_ae10 *mc; 1257 struct ether_header *eh; 1258 struct llc *llc; 1259 int ae; 1260 1261 if (m->m_len < hdrlen + sizeof(*llc) && 1262 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1263 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1264 "discard data frame: %s", "m_pullup failed"); 1265 vap->iv_stats.is_rx_tooshort++; 1266 return NULL; 1267 } 1268 memcpy(b, mtod(m, caddr_t), hdrlen); 1269 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1270 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1271 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1272 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1273 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1274 1275 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1276 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1277 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1278 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1279 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1280 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1281 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1282 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1283 llc = NULL; 1284 } else { 1285 m_adj(m, hdrlen - sizeof(*eh)); 1286 } 1287 eh = mtod(m, struct ether_header *); 1288 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1289 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1290 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1291 if (ae == IEEE80211_MESH_AE_00) { 1292 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1293 } else if (ae == IEEE80211_MESH_AE_01) { 1294 IEEE80211_ADDR_COPY(eh->ether_shost, 1295 MC01(mc)->mc_addr4); 1296 } else { 1297 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1298 (const struct ieee80211_frame *)wh, NULL, 1299 "bad AE %d", ae); 1300 vap->iv_stats.is_mesh_badae++; 1301 m_freem(m); 1302 return NULL; 1303 } 1304 } else { 1305 if (ae == IEEE80211_MESH_AE_00) { 1306 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1307 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1308 } else if (ae == IEEE80211_MESH_AE_10) { 1309 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1310 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1311 } else { 1312 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1313 (const struct ieee80211_frame *)wh, NULL, 1314 "bad AE %d", ae); 1315 vap->iv_stats.is_mesh_badae++; 1316 m_freem(m); 1317 return NULL; 1318 } 1319 } 1320 #ifndef __NO_STRICT_ALIGNMENT 1321 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1322 m = ieee80211_realign(vap, m, sizeof(*eh)); 1323 if (m == NULL) 1324 return NULL; 1325 } 1326 #endif /* !__NO_STRICT_ALIGNMENT */ 1327 if (llc != NULL) { 1328 eh = mtod(m, struct ether_header *); 1329 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1330 } 1331 return m; 1332 #undef WDIR 1333 #undef MC01 1334 } 1335 1336 /* 1337 * Return non-zero if the unicast mesh data frame should be processed 1338 * locally. Frames that are not proxy'd have our address, otherwise 1339 * we need to consult the routing table to look for a proxy entry. 1340 */ 1341 static __inline int 1342 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1343 const struct ieee80211_meshcntl *mc) 1344 { 1345 int ae = mc->mc_flags & 3; 1346 1347 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1348 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1349 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1350 ("bad AE %d", ae)); 1351 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1352 const struct ieee80211_meshcntl_ae10 *mc10 = 1353 (const struct ieee80211_meshcntl_ae10 *) mc; 1354 struct ieee80211_mesh_route *rt = 1355 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1356 /* check for proxy route to ourself */ 1357 return (rt != NULL && 1358 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1359 } else /* ucast w/o proxy */ 1360 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1361 } 1362 1363 /* 1364 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1365 * > 0 means we have forwarded data and no need to process locally 1366 * == 0 means we want to process locally (and we may have forwarded data 1367 * < 0 means there was an error and data should be discarded 1368 */ 1369 static int 1370 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1371 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1372 { 1373 struct ieee80211_qosframe_addr4 *qwh; 1374 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1375 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1376 1377 /* This is called from the RX path - don't hold this lock */ 1378 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1379 1380 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1381 1382 /* 1383 * TODO: 1384 * o verify addr2 is a legitimate transmitter 1385 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1386 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1387 */ 1388 1389 /* set lifetime of addr3 (meshDA) to initial value */ 1390 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1391 if (rt_meshda == NULL) { 1392 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1393 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1394 /* 1395 * [Optional] any of the following three actions: 1396 * o silently discard [X] 1397 * o trigger a path discovery [ ] 1398 * o inform TA that meshDA is unknown. [ ] 1399 */ 1400 /* XXX: stats */ 1401 return (-1); 1402 } 1403 1404 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1405 ms->ms_ppath->mpp_inact)); 1406 1407 /* set lifetime of addr4 (meshSA) to initial value */ 1408 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1409 KASSERT(rt_meshsa != NULL, ("no route")); 1410 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1411 ms->ms_ppath->mpp_inact)); 1412 1413 mesh_forward(vap, m, mc); 1414 return (1); /* dont process locally */ 1415 } 1416 1417 /* 1418 * Verifies transmitter, updates lifetime, precursor list and process data 1419 * locally, if data is proxy with AE = 10 it could mean data should go 1420 * on another mesh path or data should be forwarded to the DS. 1421 * 1422 * > 0 means we have forwarded data and no need to process locally 1423 * == 0 means we want to process locally (and we may have forwarded data 1424 * < 0 means there was an error and data should be discarded 1425 */ 1426 static int 1427 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1428 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1429 { 1430 struct ieee80211_qosframe_addr4 *qwh; 1431 const struct ieee80211_meshcntl_ae10 *mc10; 1432 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1433 struct ieee80211_mesh_route *rt; 1434 int ae; 1435 1436 /* This is called from the RX path - don't hold this lock */ 1437 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1438 1439 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1440 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1441 1442 /* 1443 * TODO: 1444 * o verify addr2 is a legitimate transmitter 1445 * o lifetime of precursor entry is max(init, curr) 1446 */ 1447 1448 /* set lifetime of addr4 (meshSA) to initial value */ 1449 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1450 KASSERT(rt != NULL, ("no route")); 1451 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1452 rt = NULL; 1453 1454 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1455 KASSERT(ae == IEEE80211_MESH_AE_00 || 1456 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1457 if (ae == IEEE80211_MESH_AE_10) { 1458 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1459 return (0); /* process locally */ 1460 } 1461 1462 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1463 if (rt != NULL && 1464 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1465 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1466 /* 1467 * Forward on another mesh-path, according to 1468 * amendment as specified in 9.32.4.1 1469 */ 1470 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1471 mesh_forward(vap, m, 1472 (const struct ieee80211_meshcntl *)mc10); 1473 return (1); /* dont process locally */ 1474 } 1475 /* 1476 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1477 * addressed according to 13.11.3.2. 1478 */ 1479 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1480 "forward frame to DS, SA(%6D) DA(%6D)", 1481 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1482 } 1483 return (0); /* process locally */ 1484 } 1485 1486 /* 1487 * Try to forward the group addressed data on to other mesh STAs, and 1488 * also to the DS. 1489 * 1490 * > 0 means we have forwarded data and no need to process locally 1491 * == 0 means we want to process locally (and we may have forwarded data 1492 * < 0 means there was an error and data should be discarded 1493 */ 1494 static int 1495 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1496 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1497 { 1498 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1499 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1500 1501 /* This is called from the RX path - don't hold this lock */ 1502 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1503 1504 mesh_forward(vap, m, mc); 1505 1506 if(mc->mc_ttl > 0) { 1507 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1508 /* 1509 * Forward of MSDUs from the MBSS to DS group addressed 1510 * (according to 13.11.3.2) 1511 * This happens by delivering the packet, and a bridge 1512 * will sent it on another port member. 1513 */ 1514 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1515 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) { 1516 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1517 MC01(mc)->mc_addr4, "%s", 1518 "forward from MBSS to the DS"); 1519 } 1520 } 1521 } 1522 return (0); /* process locally */ 1523 #undef MC01 1524 } 1525 1526 static int 1527 mesh_input(struct ieee80211_node *ni, struct mbuf *m, 1528 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1529 { 1530 #define HAS_SEQ(type) ((type & 0x4) == 0) 1531 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1532 struct ieee80211vap *vap = ni->ni_vap; 1533 struct ieee80211com *ic = ni->ni_ic; 1534 struct ifnet *ifp = vap->iv_ifp; 1535 struct ieee80211_frame *wh; 1536 const struct ieee80211_meshcntl *mc; 1537 int hdrspace, meshdrlen, need_tap, error; 1538 uint8_t dir, type, subtype, ae; 1539 uint32_t seq; 1540 const uint8_t *addr; 1541 uint8_t qos[2]; 1542 1543 KASSERT(ni != NULL, ("null node")); 1544 ni->ni_inact = ni->ni_inact_reload; 1545 1546 need_tap = 1; /* mbuf need to be tapped. */ 1547 type = -1; /* undefined */ 1548 1549 /* This is called from the RX path - don't hold this lock */ 1550 IEEE80211_TX_UNLOCK_ASSERT(ic); 1551 1552 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1553 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1554 ni->ni_macaddr, NULL, 1555 "too short (1): len %u", m->m_pkthdr.len); 1556 vap->iv_stats.is_rx_tooshort++; 1557 goto out; 1558 } 1559 /* 1560 * Bit of a cheat here, we use a pointer for a 3-address 1561 * frame format but don't reference fields past outside 1562 * ieee80211_frame_min w/o first validating the data is 1563 * present. 1564 */ 1565 wh = mtod(m, struct ieee80211_frame *); 1566 1567 if (!IEEE80211_IS_FC0_CHECK_VER(wh, IEEE80211_FC0_VERSION_0)) { 1568 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1569 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1570 vap->iv_stats.is_rx_badversion++; 1571 goto err; 1572 } 1573 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1574 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1575 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1576 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1577 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1578 ni->ni_noise = nf; 1579 if (HAS_SEQ(type)) { 1580 uint8_t tid = ieee80211_gettid(wh); 1581 1582 if (IEEE80211_QOS_HAS_SEQ(wh) && 1583 TID_TO_WME_AC(tid) >= WME_AC_VI) 1584 ic->ic_wme.wme_hipri_traffic++; 1585 if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs)) 1586 goto out; 1587 } 1588 } 1589 #ifdef IEEE80211_DEBUG 1590 /* 1591 * It's easier, but too expensive, to simulate different mesh 1592 * topologies by consulting the ACL policy very early, so do this 1593 * only under DEBUG. 1594 * 1595 * NB: this check is also done upon peering link initiation. 1596 */ 1597 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1598 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1599 wh, NULL, "%s", "disallowed by ACL"); 1600 vap->iv_stats.is_rx_acl++; 1601 goto out; 1602 } 1603 #endif 1604 switch (type) { 1605 case IEEE80211_FC0_TYPE_DATA: 1606 if (ni == vap->iv_bss) 1607 goto out; 1608 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1609 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1610 ni->ni_macaddr, NULL, 1611 "peer link not yet established (%d)", 1612 ni->ni_mlstate); 1613 vap->iv_stats.is_mesh_nolink++; 1614 goto out; 1615 } 1616 if (dir != IEEE80211_FC1_DIR_FROMDS && 1617 dir != IEEE80211_FC1_DIR_DSTODS) { 1618 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1619 wh, "data", "incorrect dir 0x%x", dir); 1620 vap->iv_stats.is_rx_wrongdir++; 1621 goto err; 1622 } 1623 1624 /* All Mesh data frames are QoS subtype */ 1625 if (!HAS_SEQ(type)) { 1626 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1627 wh, "data", "incorrect subtype 0x%x", subtype); 1628 vap->iv_stats.is_rx_badsubtype++; 1629 goto err; 1630 } 1631 1632 /* 1633 * Next up, any fragmentation. 1634 * XXX: we defrag before we even try to forward, 1635 * Mesh Control field is not present in sub-sequent 1636 * fragmented frames. This is in contrast to Draft 4.0. 1637 */ 1638 hdrspace = ieee80211_hdrspace(ic, wh); 1639 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1640 m = ieee80211_defrag(ni, m, hdrspace, 0); 1641 if (m == NULL) { 1642 /* Fragment dropped or frame not complete yet */ 1643 goto out; 1644 } 1645 } 1646 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1647 1648 /* 1649 * Now we have a complete Mesh Data frame. 1650 */ 1651 1652 /* 1653 * Only fromDStoDS data frames use 4 address qos frames 1654 * as specified in amendment. Otherwise addr4 is located 1655 * in the Mesh Control field and a 3 address qos frame 1656 * is used. 1657 */ 1658 *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh); 1659 1660 /* 1661 * NB: The mesh STA sets the Mesh Control Present 1662 * subfield to 1 in the Mesh Data frame containing 1663 * an unfragmented MSDU, an A-MSDU, or the first 1664 * fragment of an MSDU. 1665 * After defrag it should always be present. 1666 */ 1667 if (!(qos[1] & IEEE80211_QOS_MC)) { 1668 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1669 ni->ni_macaddr, NULL, 1670 "%s", "Mesh control field not present"); 1671 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1672 goto err; 1673 } 1674 1675 /* pull up enough to get to the mesh control */ 1676 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1677 (m = m_pullup(m, hdrspace + 1678 sizeof(struct ieee80211_meshcntl))) == NULL) { 1679 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1680 ni->ni_macaddr, NULL, 1681 "data too short: expecting %u", hdrspace); 1682 vap->iv_stats.is_rx_tooshort++; 1683 goto out; /* XXX */ 1684 } 1685 /* 1686 * Now calculate the full extent of the headers. Note 1687 * mesh_decap will pull up anything we didn't get 1688 * above when it strips the 802.11 headers. 1689 */ 1690 mc = (const struct ieee80211_meshcntl *) 1691 (mtod(m, const uint8_t *) + hdrspace); 1692 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1693 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1694 ae * IEEE80211_ADDR_LEN; 1695 hdrspace += meshdrlen; 1696 1697 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1698 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1699 (m->m_len < hdrspace) && 1700 ((m = m_pullup(m, hdrspace)) == NULL)) { 1701 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1702 ni->ni_macaddr, NULL, 1703 "data too short: expecting %u", hdrspace); 1704 vap->iv_stats.is_rx_tooshort++; 1705 goto out; /* XXX */ 1706 } 1707 /* XXX: are we sure there is no reallocating after m_pullup? */ 1708 1709 seq = le32dec(mc->mc_seq); 1710 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1711 addr = wh->i_addr3; 1712 else if (ae == IEEE80211_MESH_AE_01) 1713 addr = MC01(mc)->mc_addr4; 1714 else 1715 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1716 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1717 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1718 addr, "data", "%s", "not to me"); 1719 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1720 goto out; 1721 } 1722 if (mesh_checkpseq(vap, addr, seq) != 0) { 1723 vap->iv_stats.is_rx_dup++; 1724 goto out; 1725 } 1726 1727 /* This code "routes" the frame to the right control path */ 1728 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1729 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1730 error = 1731 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1732 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1733 error = mesh_recv_group_data(vap, m, wh, mc); 1734 else 1735 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1736 wh, mc); 1737 } else 1738 error = mesh_recv_group_data(vap, m, wh, mc); 1739 if (error < 0) 1740 goto err; 1741 else if (error > 0) 1742 goto out; 1743 1744 if (ieee80211_radiotap_active_vap(vap)) 1745 ieee80211_radiotap_rx(vap, m); 1746 need_tap = 0; 1747 1748 /* 1749 * Finally, strip the 802.11 header. 1750 */ 1751 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1752 if (m == NULL) { 1753 /* XXX mask bit to check for both */ 1754 /* don't count Null data frames as errors */ 1755 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1756 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1757 goto out; 1758 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1759 ni->ni_macaddr, "data", "%s", "decap error"); 1760 vap->iv_stats.is_rx_decap++; 1761 IEEE80211_NODE_STAT(ni, rx_decap); 1762 goto err; 1763 } 1764 if (qos[0] & IEEE80211_QOS_AMSDU) { 1765 m = ieee80211_decap_amsdu(ni, m); 1766 if (m == NULL) 1767 return IEEE80211_FC0_TYPE_DATA; 1768 } 1769 ieee80211_deliver_data(vap, ni, m); 1770 return type; 1771 case IEEE80211_FC0_TYPE_MGT: 1772 vap->iv_stats.is_rx_mgmt++; 1773 IEEE80211_NODE_STAT(ni, rx_mgmt); 1774 if (dir != IEEE80211_FC1_DIR_NODS) { 1775 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1776 wh, "mgt", "incorrect dir 0x%x", dir); 1777 vap->iv_stats.is_rx_wrongdir++; 1778 goto err; 1779 } 1780 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1781 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1782 ni->ni_macaddr, "mgt", "too short: len %u", 1783 m->m_pkthdr.len); 1784 vap->iv_stats.is_rx_tooshort++; 1785 goto out; 1786 } 1787 #ifdef IEEE80211_DEBUG 1788 if ((ieee80211_msg_debug(vap) && 1789 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1790 ieee80211_msg_dumppkts(vap)) { 1791 if_printf(ifp, "received %s from %s rssi %d\n", 1792 ieee80211_mgt_subtype_name(subtype), 1793 ether_sprintf(wh->i_addr2), rssi); 1794 } 1795 #endif 1796 if (IEEE80211_IS_PROTECTED(wh)) { 1797 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1798 wh, NULL, "%s", "WEP set but not permitted"); 1799 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1800 goto out; 1801 } 1802 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 1803 goto out; 1804 case IEEE80211_FC0_TYPE_CTL: 1805 vap->iv_stats.is_rx_ctl++; 1806 IEEE80211_NODE_STAT(ni, rx_ctrl); 1807 goto out; 1808 default: 1809 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1810 wh, "bad", "frame type 0x%x", type); 1811 /* should not come here */ 1812 break; 1813 } 1814 err: 1815 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1816 out: 1817 if (m != NULL) { 1818 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1819 ieee80211_radiotap_rx(vap, m); 1820 m_freem(m); 1821 } 1822 return type; 1823 #undef HAS_SEQ 1824 #undef MC01 1825 } 1826 1827 static void 1828 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1829 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1830 { 1831 struct ieee80211vap *vap = ni->ni_vap; 1832 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1833 struct ieee80211com *ic = ni->ni_ic; 1834 struct ieee80211_channel *rxchan = ic->ic_curchan; 1835 struct ieee80211_frame *wh; 1836 struct ieee80211_mesh_route *rt; 1837 uint8_t *frm, *efrm; 1838 1839 wh = mtod(m0, struct ieee80211_frame *); 1840 frm = (uint8_t *)&wh[1]; 1841 efrm = mtod(m0, uint8_t *) + m0->m_len; 1842 switch (subtype) { 1843 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1844 case IEEE80211_FC0_SUBTYPE_BEACON: 1845 { 1846 struct ieee80211_scanparams scan; 1847 struct ieee80211_channel *c; 1848 /* 1849 * We process beacon/probe response 1850 * frames to discover neighbors. 1851 */ 1852 if (rxs != NULL) { 1853 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1854 if (c != NULL) 1855 rxchan = c; 1856 } 1857 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) 1858 return; 1859 /* 1860 * Count frame now that we know it's to be processed. 1861 */ 1862 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1863 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1864 IEEE80211_NODE_STAT(ni, rx_beacons); 1865 } else 1866 IEEE80211_NODE_STAT(ni, rx_proberesp); 1867 /* 1868 * If scanning, just pass information to the scan module. 1869 */ 1870 if (ic->ic_flags & IEEE80211_F_SCAN) { 1871 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1872 /* 1873 * Actively scanning a channel marked passive; 1874 * send a probe request now that we know there 1875 * is 802.11 traffic present. 1876 * 1877 * XXX check if the beacon we recv'd gives 1878 * us what we need and suppress the probe req 1879 */ 1880 ieee80211_probe_curchan(vap, true); 1881 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1882 } 1883 ieee80211_add_scan(vap, rxchan, &scan, wh, 1884 subtype, rssi, nf); 1885 return; 1886 } 1887 1888 /* The rest of this code assumes we are running */ 1889 if (vap->iv_state != IEEE80211_S_RUN) 1890 return; 1891 /* 1892 * Ignore non-mesh STAs. 1893 */ 1894 if ((scan.capinfo & 1895 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1896 scan.meshid == NULL || scan.meshconf == NULL) { 1897 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1898 wh, "beacon", "%s", "not a mesh sta"); 1899 vap->iv_stats.is_mesh_wrongmesh++; 1900 return; 1901 } 1902 /* 1903 * Ignore STAs for other mesh networks. 1904 */ 1905 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1906 mesh_verify_meshconf(vap, scan.meshconf)) { 1907 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1908 wh, "beacon", "%s", "not for our mesh"); 1909 vap->iv_stats.is_mesh_wrongmesh++; 1910 return; 1911 } 1912 /* 1913 * Peer only based on the current ACL policy. 1914 */ 1915 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1916 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1917 wh, NULL, "%s", "disallowed by ACL"); 1918 vap->iv_stats.is_rx_acl++; 1919 return; 1920 } 1921 /* 1922 * Do neighbor discovery. 1923 */ 1924 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1925 /* 1926 * Create a new entry in the neighbor table. 1927 */ 1928 ni = ieee80211_add_neighbor(vap, wh, &scan); 1929 } 1930 /* 1931 * Automatically peer with discovered nodes if possible. 1932 */ 1933 if (ni != vap->iv_bss && 1934 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1935 switch (ni->ni_mlstate) { 1936 case IEEE80211_NODE_MESH_IDLE: 1937 { 1938 uint16_t args[1]; 1939 1940 /* Wait for backoff callout to reset counter */ 1941 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1942 return; 1943 1944 ni->ni_mlpid = mesh_generateid(vap); 1945 if (ni->ni_mlpid == 0) 1946 return; 1947 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1948 args[0] = ni->ni_mlpid; 1949 ieee80211_send_action(ni, 1950 IEEE80211_ACTION_CAT_SELF_PROT, 1951 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1952 ni->ni_mlrcnt = 0; 1953 mesh_peer_timeout_setup(ni); 1954 break; 1955 } 1956 case IEEE80211_NODE_MESH_ESTABLISHED: 1957 { 1958 /* 1959 * Valid beacon from a peer mesh STA 1960 * bump TA lifetime 1961 */ 1962 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1963 if(rt != NULL) { 1964 ieee80211_mesh_rt_update(rt, 1965 ticks_to_msecs( 1966 ms->ms_ppath->mpp_inact)); 1967 } 1968 break; 1969 } 1970 default: 1971 break; /* ignore */ 1972 } 1973 } 1974 break; 1975 } 1976 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1977 { 1978 uint8_t *ssid, *meshid, *rates, *xrates; 1979 1980 if (vap->iv_state != IEEE80211_S_RUN) { 1981 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1982 wh, NULL, "wrong state %s", 1983 ieee80211_state_name[vap->iv_state]); 1984 vap->iv_stats.is_rx_mgtdiscard++; 1985 return; 1986 } 1987 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1988 /* frame must be directed */ 1989 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1990 wh, NULL, "%s", "not unicast"); 1991 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1992 return; 1993 } 1994 /* 1995 * prreq frame format 1996 * [tlv] ssid 1997 * [tlv] supported rates 1998 * [tlv] extended supported rates 1999 * [tlv] mesh id 2000 */ 2001 ssid = meshid = rates = xrates = NULL; 2002 while (efrm - frm > 1) { 2003 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2004 switch (*frm) { 2005 case IEEE80211_ELEMID_SSID: 2006 ssid = frm; 2007 break; 2008 case IEEE80211_ELEMID_RATES: 2009 rates = frm; 2010 break; 2011 case IEEE80211_ELEMID_XRATES: 2012 xrates = frm; 2013 break; 2014 case IEEE80211_ELEMID_MESHID: 2015 meshid = frm; 2016 break; 2017 } 2018 frm += frm[1] + 2; 2019 } 2020 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2021 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2022 if (xrates != NULL) 2023 IEEE80211_VERIFY_ELEMENT(xrates, 2024 IEEE80211_RATE_MAXSIZE - rates[1], return); 2025 if (meshid != NULL) { 2026 IEEE80211_VERIFY_ELEMENT(meshid, 2027 IEEE80211_MESHID_LEN, return); 2028 /* NB: meshid, not ssid */ 2029 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2030 } 2031 2032 /* XXX find a better class or define it's own */ 2033 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2034 "%s", "recv probe req"); 2035 /* 2036 * Some legacy 11b clients cannot hack a complete 2037 * probe response frame. When the request includes 2038 * only a bare-bones rate set, communicate this to 2039 * the transmit side. 2040 */ 2041 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2042 break; 2043 } 2044 2045 case IEEE80211_FC0_SUBTYPE_ACTION: 2046 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2047 if (ni == vap->iv_bss) { 2048 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2049 wh, NULL, "%s", "unknown node"); 2050 vap->iv_stats.is_rx_mgtdiscard++; 2051 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2052 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2053 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2054 wh, NULL, "%s", "not for us"); 2055 vap->iv_stats.is_rx_mgtdiscard++; 2056 } else if (vap->iv_state != IEEE80211_S_RUN) { 2057 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2058 wh, NULL, "wrong state %s", 2059 ieee80211_state_name[vap->iv_state]); 2060 vap->iv_stats.is_rx_mgtdiscard++; 2061 } else { 2062 if (ieee80211_parse_action(ni, m0) == 0) 2063 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2064 } 2065 break; 2066 2067 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2068 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2069 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2070 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2071 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 2072 case IEEE80211_FC0_SUBTYPE_ATIM: 2073 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2074 case IEEE80211_FC0_SUBTYPE_AUTH: 2075 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2076 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2077 wh, NULL, "%s", "not handled"); 2078 vap->iv_stats.is_rx_mgtdiscard++; 2079 break; 2080 2081 default: 2082 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2083 wh, "mgt", "subtype 0x%x not handled", subtype); 2084 vap->iv_stats.is_rx_badsubtype++; 2085 break; 2086 } 2087 } 2088 2089 static void 2090 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2091 { 2092 2093 switch (subtype) { 2094 case IEEE80211_FC0_SUBTYPE_BAR: 2095 ieee80211_recv_bar(ni, m); 2096 break; 2097 } 2098 } 2099 2100 /* 2101 * Parse meshpeering action ie's for MPM frames 2102 */ 2103 static const struct ieee80211_meshpeer_ie * 2104 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2105 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2106 const uint8_t *frm, const uint8_t *efrm, 2107 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2108 { 2109 struct ieee80211vap *vap = ni->ni_vap; 2110 const struct ieee80211_meshpeer_ie *mpie; 2111 uint16_t args[3]; 2112 const uint8_t *meshid, *meshconf; 2113 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2114 2115 meshid = meshconf = NULL; 2116 while (efrm - frm > 1) { 2117 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2118 switch (*frm) { 2119 case IEEE80211_ELEMID_MESHID: 2120 meshid = frm; 2121 break; 2122 case IEEE80211_ELEMID_MESHCONF: 2123 meshconf = frm; 2124 break; 2125 case IEEE80211_ELEMID_MESHPEER: 2126 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2127 memset(mp, 0, sizeof(*mp)); 2128 mp->peer_len = mpie->peer_len; 2129 mp->peer_proto = le16dec(&mpie->peer_proto); 2130 mp->peer_llinkid = le16dec(&mpie->peer_llinkid); 2131 switch (subtype) { 2132 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2133 mp->peer_linkid = 2134 le16dec(&mpie->peer_linkid); 2135 break; 2136 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2137 /* NB: peer link ID is optional */ 2138 if (mpie->peer_len == 2139 (IEEE80211_MPM_BASE_SZ + 2)) { 2140 mp->peer_linkid = 0; 2141 mp->peer_rcode = 2142 le16dec(&mpie->peer_linkid); 2143 } else { 2144 mp->peer_linkid = 2145 le16dec(&mpie->peer_linkid); 2146 mp->peer_rcode = 2147 le16dec(&mpie->peer_rcode); 2148 } 2149 break; 2150 } 2151 break; 2152 } 2153 frm += frm[1] + 2; 2154 } 2155 2156 /* 2157 * Verify the contents of the frame. 2158 * If it fails validation, close the peer link. 2159 */ 2160 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2161 sendclose = 1; 2162 IEEE80211_DISCARD(vap, 2163 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2164 wh, NULL, "%s", "MPM validation failed"); 2165 } 2166 2167 /* If meshid is not the same reject any frames type. */ 2168 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2169 sendclose = 1; 2170 IEEE80211_DISCARD(vap, 2171 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2172 wh, NULL, "%s", "not for our mesh"); 2173 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2174 /* 2175 * Standard not clear about this, if we dont ignore 2176 * there will be an endless loop between nodes sending 2177 * CLOSE frames between each other with wrong meshid. 2178 * Discard and timers will bring FSM to IDLE state. 2179 */ 2180 return NULL; 2181 } 2182 } 2183 2184 /* 2185 * Close frames are accepted if meshid is the same. 2186 * Verify the other two types. 2187 */ 2188 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2189 mesh_verify_meshconf(vap, meshconf)) { 2190 sendclose = 1; 2191 IEEE80211_DISCARD(vap, 2192 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2193 wh, NULL, "%s", "configuration mismatch"); 2194 } 2195 2196 if (sendclose) { 2197 vap->iv_stats.is_rx_mgtdiscard++; 2198 switch (ni->ni_mlstate) { 2199 case IEEE80211_NODE_MESH_IDLE: 2200 case IEEE80211_NODE_MESH_ESTABLISHED: 2201 case IEEE80211_NODE_MESH_HOLDING: 2202 /* ignore */ 2203 break; 2204 case IEEE80211_NODE_MESH_OPENSNT: 2205 case IEEE80211_NODE_MESH_OPENRCV: 2206 case IEEE80211_NODE_MESH_CONFIRMRCV: 2207 args[0] = ni->ni_mlpid; 2208 args[1] = ni->ni_mllid; 2209 /* Reason codes for rejection */ 2210 switch (subtype) { 2211 case IEEE80211_ACTION_MESHPEERING_OPEN: 2212 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2213 break; 2214 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2215 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2216 break; 2217 } 2218 ieee80211_send_action(ni, 2219 IEEE80211_ACTION_CAT_SELF_PROT, 2220 IEEE80211_ACTION_MESHPEERING_CLOSE, 2221 args); 2222 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2223 mesh_peer_timeout_setup(ni); 2224 break; 2225 } 2226 return NULL; 2227 } 2228 2229 return (const struct ieee80211_meshpeer_ie *) mp; 2230 } 2231 2232 static int 2233 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2234 const struct ieee80211_frame *wh, 2235 const uint8_t *frm, const uint8_t *efrm) 2236 { 2237 struct ieee80211vap *vap = ni->ni_vap; 2238 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2239 struct ieee80211_meshpeer_ie ie; 2240 const struct ieee80211_meshpeer_ie *meshpeer; 2241 uint16_t args[3]; 2242 2243 /* +2+2 for action + code + capabilites */ 2244 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2245 IEEE80211_ACTION_MESHPEERING_OPEN); 2246 if (meshpeer == NULL) { 2247 return 0; 2248 } 2249 2250 /* XXX move up */ 2251 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2252 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2253 2254 switch (ni->ni_mlstate) { 2255 case IEEE80211_NODE_MESH_IDLE: 2256 /* Reject open request if reached our maximum neighbor count */ 2257 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2258 args[0] = meshpeer->peer_llinkid; 2259 args[1] = 0; 2260 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2261 ieee80211_send_action(ni, 2262 IEEE80211_ACTION_CAT_SELF_PROT, 2263 IEEE80211_ACTION_MESHPEERING_CLOSE, 2264 args); 2265 /* stay in IDLE state */ 2266 return (0); 2267 } 2268 /* Open frame accepted */ 2269 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2270 ni->ni_mllid = meshpeer->peer_llinkid; 2271 ni->ni_mlpid = mesh_generateid(vap); 2272 if (ni->ni_mlpid == 0) 2273 return 0; /* XXX */ 2274 args[0] = ni->ni_mlpid; 2275 /* Announce we're open too... */ 2276 ieee80211_send_action(ni, 2277 IEEE80211_ACTION_CAT_SELF_PROT, 2278 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2279 /* ...and confirm the link. */ 2280 args[0] = ni->ni_mlpid; 2281 args[1] = ni->ni_mllid; 2282 ieee80211_send_action(ni, 2283 IEEE80211_ACTION_CAT_SELF_PROT, 2284 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2285 args); 2286 mesh_peer_timeout_setup(ni); 2287 break; 2288 case IEEE80211_NODE_MESH_OPENRCV: 2289 /* Wrong Link ID */ 2290 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2291 args[0] = ni->ni_mllid; 2292 args[1] = ni->ni_mlpid; 2293 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2294 ieee80211_send_action(ni, 2295 IEEE80211_ACTION_CAT_SELF_PROT, 2296 IEEE80211_ACTION_MESHPEERING_CLOSE, 2297 args); 2298 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2299 mesh_peer_timeout_setup(ni); 2300 break; 2301 } 2302 /* Duplicate open, confirm again. */ 2303 args[0] = ni->ni_mlpid; 2304 args[1] = ni->ni_mllid; 2305 ieee80211_send_action(ni, 2306 IEEE80211_ACTION_CAT_SELF_PROT, 2307 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2308 args); 2309 break; 2310 case IEEE80211_NODE_MESH_OPENSNT: 2311 ni->ni_mllid = meshpeer->peer_llinkid; 2312 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2313 args[0] = ni->ni_mlpid; 2314 args[1] = ni->ni_mllid; 2315 ieee80211_send_action(ni, 2316 IEEE80211_ACTION_CAT_SELF_PROT, 2317 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2318 args); 2319 /* NB: don't setup/clear any timeout */ 2320 break; 2321 case IEEE80211_NODE_MESH_CONFIRMRCV: 2322 if (ni->ni_mlpid != meshpeer->peer_linkid || 2323 ni->ni_mllid != meshpeer->peer_llinkid) { 2324 args[0] = ni->ni_mlpid; 2325 args[1] = ni->ni_mllid; 2326 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2327 ieee80211_send_action(ni, 2328 IEEE80211_ACTION_CAT_SELF_PROT, 2329 IEEE80211_ACTION_MESHPEERING_CLOSE, 2330 args); 2331 mesh_linkchange(ni, 2332 IEEE80211_NODE_MESH_HOLDING); 2333 mesh_peer_timeout_setup(ni); 2334 break; 2335 } 2336 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2337 ni->ni_mllid = meshpeer->peer_llinkid; 2338 args[0] = ni->ni_mlpid; 2339 args[1] = ni->ni_mllid; 2340 ieee80211_send_action(ni, 2341 IEEE80211_ACTION_CAT_SELF_PROT, 2342 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2343 args); 2344 mesh_peer_timeout_stop(ni); 2345 break; 2346 case IEEE80211_NODE_MESH_ESTABLISHED: 2347 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2348 args[0] = ni->ni_mllid; 2349 args[1] = ni->ni_mlpid; 2350 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2351 ieee80211_send_action(ni, 2352 IEEE80211_ACTION_CAT_SELF_PROT, 2353 IEEE80211_ACTION_MESHPEERING_CLOSE, 2354 args); 2355 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2356 mesh_peer_timeout_setup(ni); 2357 break; 2358 } 2359 args[0] = ni->ni_mlpid; 2360 args[1] = ni->ni_mllid; 2361 ieee80211_send_action(ni, 2362 IEEE80211_ACTION_CAT_SELF_PROT, 2363 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2364 args); 2365 break; 2366 case IEEE80211_NODE_MESH_HOLDING: 2367 args[0] = ni->ni_mlpid; 2368 args[1] = meshpeer->peer_llinkid; 2369 /* Standard not clear about what the reaason code should be */ 2370 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2371 ieee80211_send_action(ni, 2372 IEEE80211_ACTION_CAT_SELF_PROT, 2373 IEEE80211_ACTION_MESHPEERING_CLOSE, 2374 args); 2375 break; 2376 } 2377 return 0; 2378 } 2379 2380 static int 2381 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2382 const struct ieee80211_frame *wh, 2383 const uint8_t *frm, const uint8_t *efrm) 2384 { 2385 struct ieee80211vap *vap = ni->ni_vap; 2386 struct ieee80211_meshpeer_ie ie; 2387 const struct ieee80211_meshpeer_ie *meshpeer; 2388 uint16_t args[3]; 2389 2390 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2391 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2392 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2393 if (meshpeer == NULL) { 2394 return 0; 2395 } 2396 2397 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2398 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2399 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2400 2401 switch (ni->ni_mlstate) { 2402 case IEEE80211_NODE_MESH_OPENRCV: 2403 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2404 mesh_peer_timeout_stop(ni); 2405 break; 2406 case IEEE80211_NODE_MESH_OPENSNT: 2407 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2408 mesh_peer_timeout_setup(ni); 2409 break; 2410 case IEEE80211_NODE_MESH_HOLDING: 2411 args[0] = ni->ni_mlpid; 2412 args[1] = meshpeer->peer_llinkid; 2413 /* Standard not clear about what the reaason code should be */ 2414 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2415 ieee80211_send_action(ni, 2416 IEEE80211_ACTION_CAT_SELF_PROT, 2417 IEEE80211_ACTION_MESHPEERING_CLOSE, 2418 args); 2419 break; 2420 case IEEE80211_NODE_MESH_CONFIRMRCV: 2421 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2422 args[0] = ni->ni_mlpid; 2423 args[1] = ni->ni_mllid; 2424 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2425 ieee80211_send_action(ni, 2426 IEEE80211_ACTION_CAT_SELF_PROT, 2427 IEEE80211_ACTION_MESHPEERING_CLOSE, 2428 args); 2429 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2430 mesh_peer_timeout_setup(ni); 2431 } 2432 break; 2433 default: 2434 IEEE80211_DISCARD(vap, 2435 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2436 wh, NULL, "received confirm in invalid state %d", 2437 ni->ni_mlstate); 2438 vap->iv_stats.is_rx_mgtdiscard++; 2439 break; 2440 } 2441 return 0; 2442 } 2443 2444 static int 2445 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2446 const struct ieee80211_frame *wh, 2447 const uint8_t *frm, const uint8_t *efrm) 2448 { 2449 struct ieee80211_meshpeer_ie ie; 2450 const struct ieee80211_meshpeer_ie *meshpeer; 2451 uint16_t args[3]; 2452 2453 /* +2 for action + code */ 2454 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2455 IEEE80211_ACTION_MESHPEERING_CLOSE); 2456 if (meshpeer == NULL) { 2457 return 0; 2458 } 2459 2460 /* 2461 * XXX: check reason code, for example we could receive 2462 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2463 * to peer again. 2464 */ 2465 2466 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2467 ni, "%s", "recv PEER CLOSE"); 2468 2469 switch (ni->ni_mlstate) { 2470 case IEEE80211_NODE_MESH_IDLE: 2471 /* ignore */ 2472 break; 2473 case IEEE80211_NODE_MESH_OPENRCV: 2474 case IEEE80211_NODE_MESH_OPENSNT: 2475 case IEEE80211_NODE_MESH_CONFIRMRCV: 2476 case IEEE80211_NODE_MESH_ESTABLISHED: 2477 args[0] = ni->ni_mlpid; 2478 args[1] = ni->ni_mllid; 2479 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2480 ieee80211_send_action(ni, 2481 IEEE80211_ACTION_CAT_SELF_PROT, 2482 IEEE80211_ACTION_MESHPEERING_CLOSE, 2483 args); 2484 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2485 mesh_peer_timeout_setup(ni); 2486 break; 2487 case IEEE80211_NODE_MESH_HOLDING: 2488 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2489 mesh_peer_timeout_stop(ni); 2490 break; 2491 } 2492 return 0; 2493 } 2494 2495 /* 2496 * Link Metric handling. 2497 */ 2498 static int 2499 mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2500 const struct ieee80211_frame *wh, 2501 const uint8_t *frm, const uint8_t *efrm) 2502 { 2503 const struct ieee80211_meshlmetric_ie *ie = 2504 (const struct ieee80211_meshlmetric_ie *) 2505 (frm+2); /* action + code */ 2506 struct ieee80211_meshlmetric_ie lm_rep; 2507 2508 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2509 lm_rep.lm_flags = 0; 2510 lm_rep.lm_metric = mesh_airtime_calc(ni); 2511 ieee80211_send_action(ni, 2512 IEEE80211_ACTION_CAT_MESH, 2513 IEEE80211_ACTION_MESH_LMETRIC, 2514 &lm_rep); 2515 } 2516 /* XXX: else do nothing for now */ 2517 return 0; 2518 } 2519 2520 /* 2521 * Parse meshgate action ie's for GANN frames. 2522 * Returns -1 if parsing fails, otherwise 0. 2523 */ 2524 static int 2525 mesh_parse_meshgate_action(struct ieee80211_node *ni, 2526 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2527 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2528 { 2529 struct ieee80211vap *vap = ni->ni_vap; 2530 const struct ieee80211_meshgann_ie *gannie; 2531 2532 while (efrm - frm > 1) { 2533 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2534 switch (*frm) { 2535 case IEEE80211_ELEMID_MESHGANN: 2536 gannie = (const struct ieee80211_meshgann_ie *) frm; 2537 memset(ie, 0, sizeof(*ie)); 2538 ie->gann_ie = gannie->gann_ie; 2539 ie->gann_len = gannie->gann_len; 2540 ie->gann_flags = gannie->gann_flags; 2541 ie->gann_hopcount = gannie->gann_hopcount; 2542 ie->gann_ttl = gannie->gann_ttl; 2543 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2544 ie->gann_seq = le32dec(&gannie->gann_seq); 2545 ie->gann_interval = le16dec(&gannie->gann_interval); 2546 break; 2547 } 2548 frm += frm[1] + 2; 2549 } 2550 2551 return 0; 2552 } 2553 2554 /* 2555 * Mesh Gate Announcement handling. 2556 */ 2557 static int 2558 mesh_recv_action_meshgate(struct ieee80211_node *ni, 2559 const struct ieee80211_frame *wh, 2560 const uint8_t *frm, const uint8_t *efrm) 2561 { 2562 struct ieee80211vap *vap = ni->ni_vap; 2563 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2564 struct ieee80211_mesh_gate_route *gr, *next; 2565 struct ieee80211_mesh_route *rt_gate; 2566 struct ieee80211_meshgann_ie pgann; 2567 struct ieee80211_meshgann_ie ie; 2568 int found = 0; 2569 2570 /* +2 for action + code */ 2571 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2572 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2573 ni->ni_macaddr, NULL, "%s", 2574 "GANN parsing failed"); 2575 vap->iv_stats.is_rx_mgtdiscard++; 2576 return (0); 2577 } 2578 2579 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2580 return 0; 2581 2582 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2583 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2584 ie.gann_seq); 2585 2586 if (ms == NULL) 2587 return (0); 2588 MESH_RT_LOCK(ms); 2589 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2590 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2591 continue; 2592 if (ie.gann_seq <= gr->gr_lastseq) { 2593 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2594 ni->ni_macaddr, NULL, 2595 "GANN old seqno %u <= %u", 2596 ie.gann_seq, gr->gr_lastseq); 2597 MESH_RT_UNLOCK(ms); 2598 return (0); 2599 } 2600 /* corresponding mesh gate found & GANN accepted */ 2601 found = 1; 2602 break; 2603 } 2604 if (found == 0) { 2605 /* this GANN is from a new mesh Gate add it to known table. */ 2606 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2607 "stored new GANN information, seq %u.", ie.gann_seq); 2608 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2609 M_80211_MESH_GT_RT, 2610 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2611 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2612 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2613 } 2614 gr->gr_lastseq = ie.gann_seq; 2615 2616 /* check if we have a path to this gate */ 2617 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2618 if (rt_gate != NULL && 2619 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2620 gr->gr_route = rt_gate; 2621 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2622 } 2623 2624 MESH_RT_UNLOCK(ms); 2625 2626 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2627 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2628 return 0; 2629 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2630 pgann.gann_hopcount = ie.gann_hopcount + 1; 2631 pgann.gann_ttl = ie.gann_ttl - 1; 2632 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2633 pgann.gann_seq = ie.gann_seq; 2634 pgann.gann_interval = ie.gann_interval; 2635 2636 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2637 "%s", "propagate GANN"); 2638 2639 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2640 IEEE80211_ACTION_MESH_GANN, &pgann); 2641 2642 return 0; 2643 } 2644 2645 static int 2646 mesh_send_action(struct ieee80211_node *ni, 2647 const uint8_t sa[IEEE80211_ADDR_LEN], 2648 const uint8_t da[IEEE80211_ADDR_LEN], 2649 struct mbuf *m) 2650 { 2651 struct ieee80211vap *vap = ni->ni_vap; 2652 struct ieee80211com *ic = ni->ni_ic; 2653 struct ieee80211_bpf_params params; 2654 int ret; 2655 2656 KASSERT(ni != NULL, ("null node")); 2657 2658 if (vap->iv_state == IEEE80211_S_CAC) { 2659 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2660 "block %s frame in CAC state", "Mesh action"); 2661 vap->iv_stats.is_tx_badstate++; 2662 ieee80211_free_node(ni); 2663 m_freem(m); 2664 return EIO; /* XXX */ 2665 } 2666 2667 M_PREPEND(m, sizeof(struct ieee80211_frame), IEEE80211_M_NOWAIT); 2668 if (m == NULL) { 2669 ieee80211_free_node(ni); 2670 return ENOMEM; 2671 } 2672 2673 IEEE80211_TX_LOCK(ic); 2674 ieee80211_send_setup(ni, m, 2675 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2676 IEEE80211_NONQOS_TID, sa, da, sa); 2677 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2678 2679 memset(¶ms, 0, sizeof(params)); 2680 params.ibp_pri = WME_AC_VO; 2681 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2682 if (IEEE80211_IS_MULTICAST(da)) 2683 params.ibp_try0 = 1; 2684 else 2685 params.ibp_try0 = ni->ni_txparms->maxretry; 2686 params.ibp_power = ni->ni_txpower; 2687 2688 IEEE80211_NODE_STAT(ni, tx_mgmt); 2689 2690 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2691 IEEE80211_TX_UNLOCK(ic); 2692 return (ret); 2693 } 2694 2695 #define ADDSHORT(frm, v) do { \ 2696 frm[0] = (v) & 0xff; \ 2697 frm[1] = (v) >> 8; \ 2698 frm += 2; \ 2699 } while (0) 2700 #define ADDWORD(frm, v) do { \ 2701 frm[0] = (v) & 0xff; \ 2702 frm[1] = ((v) >> 8) & 0xff; \ 2703 frm[2] = ((v) >> 16) & 0xff; \ 2704 frm[3] = ((v) >> 24) & 0xff; \ 2705 frm += 4; \ 2706 } while (0) 2707 2708 static int 2709 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2710 int category, int action, void *args0) 2711 { 2712 struct ieee80211vap *vap = ni->ni_vap; 2713 struct ieee80211com *ic = ni->ni_ic; 2714 uint16_t *args = args0; 2715 const struct ieee80211_rateset *rs; 2716 struct mbuf *m; 2717 uint8_t *frm; 2718 2719 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2720 "send PEER OPEN action: localid 0x%x", args[0]); 2721 2722 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2723 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2724 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2725 ieee80211_ref_node(ni); 2726 2727 m = ieee80211_getmgtframe(&frm, 2728 ic->ic_headroom + sizeof(struct ieee80211_frame), 2729 sizeof(uint16_t) /* action+category */ 2730 + sizeof(uint16_t) /* capabilites */ 2731 + 2 + IEEE80211_RATE_SIZE 2732 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2733 + 2 + IEEE80211_MESHID_LEN 2734 + sizeof(struct ieee80211_meshconf_ie) 2735 + sizeof(struct ieee80211_meshpeer_ie) 2736 ); 2737 if (m != NULL) { 2738 /* 2739 * mesh peer open action frame format: 2740 * [1] category 2741 * [1] action 2742 * [2] capabilities 2743 * [tlv] rates 2744 * [tlv] xrates 2745 * [tlv] mesh id 2746 * [tlv] mesh conf 2747 * [tlv] mesh peer link mgmt 2748 */ 2749 *frm++ = category; 2750 *frm++ = action; 2751 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2752 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2753 frm = ieee80211_add_rates(frm, rs); 2754 frm = ieee80211_add_xrates(frm, rs); 2755 frm = ieee80211_add_meshid(frm, vap); 2756 frm = ieee80211_add_meshconf(frm, vap); 2757 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2758 args[0], 0, 0); 2759 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2760 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2761 } else { 2762 vap->iv_stats.is_tx_nobuf++; 2763 ieee80211_free_node(ni); 2764 return ENOMEM; 2765 } 2766 } 2767 2768 static int 2769 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2770 int category, int action, void *args0) 2771 { 2772 struct ieee80211vap *vap = ni->ni_vap; 2773 struct ieee80211com *ic = ni->ni_ic; 2774 uint16_t *args = args0; 2775 const struct ieee80211_rateset *rs; 2776 struct mbuf *m; 2777 uint8_t *frm; 2778 2779 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2780 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2781 args[0], args[1]); 2782 2783 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2784 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2785 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2786 ieee80211_ref_node(ni); 2787 2788 m = ieee80211_getmgtframe(&frm, 2789 ic->ic_headroom + sizeof(struct ieee80211_frame), 2790 sizeof(uint16_t) /* action+category */ 2791 + sizeof(uint16_t) /* capabilites */ 2792 + sizeof(uint16_t) /* status code */ 2793 + sizeof(uint16_t) /* AID */ 2794 + 2 + IEEE80211_RATE_SIZE 2795 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2796 + 2 + IEEE80211_MESHID_LEN 2797 + sizeof(struct ieee80211_meshconf_ie) 2798 + sizeof(struct ieee80211_meshpeer_ie) 2799 ); 2800 if (m != NULL) { 2801 /* 2802 * mesh peer confirm action frame format: 2803 * [1] category 2804 * [1] action 2805 * [2] capabilities 2806 * [2] status code 2807 * [2] association id (peer ID) 2808 * [tlv] rates 2809 * [tlv] xrates 2810 * [tlv] mesh id 2811 * [tlv] mesh conf 2812 * [tlv] mesh peer link mgmt 2813 */ 2814 *frm++ = category; 2815 *frm++ = action; 2816 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2817 ADDSHORT(frm, 0); /* status code */ 2818 ADDSHORT(frm, args[1]); /* AID */ 2819 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2820 frm = ieee80211_add_rates(frm, rs); 2821 frm = ieee80211_add_xrates(frm, rs); 2822 frm = ieee80211_add_meshid(frm, vap); 2823 frm = ieee80211_add_meshconf(frm, vap); 2824 frm = ieee80211_add_meshpeer(frm, 2825 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2826 args[0], args[1], 0); 2827 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2828 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2829 } else { 2830 vap->iv_stats.is_tx_nobuf++; 2831 ieee80211_free_node(ni); 2832 return ENOMEM; 2833 } 2834 } 2835 2836 static int 2837 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2838 int category, int action, void *args0) 2839 { 2840 struct ieee80211vap *vap = ni->ni_vap; 2841 struct ieee80211com *ic = ni->ni_ic; 2842 uint16_t *args = args0; 2843 struct mbuf *m; 2844 uint8_t *frm; 2845 2846 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2847 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)", 2848 args[0], args[1], args[2], ieee80211_reason_to_string(args[2])); 2849 2850 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2851 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2852 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2853 ieee80211_ref_node(ni); 2854 2855 m = ieee80211_getmgtframe(&frm, 2856 ic->ic_headroom + sizeof(struct ieee80211_frame), 2857 sizeof(uint16_t) /* action+category */ 2858 + sizeof(uint16_t) /* reason code */ 2859 + 2 + IEEE80211_MESHID_LEN 2860 + sizeof(struct ieee80211_meshpeer_ie) 2861 ); 2862 if (m != NULL) { 2863 /* 2864 * mesh peer close action frame format: 2865 * [1] category 2866 * [1] action 2867 * [tlv] mesh id 2868 * [tlv] mesh peer link mgmt 2869 */ 2870 *frm++ = category; 2871 *frm++ = action; 2872 frm = ieee80211_add_meshid(frm, vap); 2873 frm = ieee80211_add_meshpeer(frm, 2874 IEEE80211_ACTION_MESHPEERING_CLOSE, 2875 args[0], args[1], args[2]); 2876 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2877 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2878 } else { 2879 vap->iv_stats.is_tx_nobuf++; 2880 ieee80211_free_node(ni); 2881 return ENOMEM; 2882 } 2883 } 2884 2885 static int 2886 mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2887 int category, int action, void *arg0) 2888 { 2889 struct ieee80211vap *vap = ni->ni_vap; 2890 struct ieee80211com *ic = ni->ni_ic; 2891 struct ieee80211_meshlmetric_ie *ie = arg0; 2892 struct mbuf *m; 2893 uint8_t *frm; 2894 2895 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2896 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2897 ni, "%s", "send LINK METRIC REQUEST action"); 2898 } else { 2899 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2900 ni, "send LINK METRIC REPLY action: metric 0x%x", 2901 ie->lm_metric); 2902 } 2903 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2904 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2905 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2906 ieee80211_ref_node(ni); 2907 2908 m = ieee80211_getmgtframe(&frm, 2909 ic->ic_headroom + sizeof(struct ieee80211_frame), 2910 sizeof(uint16_t) + /* action+category */ 2911 sizeof(struct ieee80211_meshlmetric_ie) 2912 ); 2913 if (m != NULL) { 2914 /* 2915 * mesh link metric 2916 * [1] category 2917 * [1] action 2918 * [tlv] mesh link metric 2919 */ 2920 *frm++ = category; 2921 *frm++ = action; 2922 frm = ieee80211_add_meshlmetric(frm, 2923 ie->lm_flags, ie->lm_metric); 2924 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2925 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2926 } else { 2927 vap->iv_stats.is_tx_nobuf++; 2928 ieee80211_free_node(ni); 2929 return ENOMEM; 2930 } 2931 } 2932 2933 static int 2934 mesh_send_action_meshgate(struct ieee80211_node *ni, 2935 int category, int action, void *arg0) 2936 { 2937 struct ieee80211vap *vap = ni->ni_vap; 2938 struct ieee80211com *ic = ni->ni_ic; 2939 struct ieee80211_meshgann_ie *ie = arg0; 2940 struct mbuf *m; 2941 uint8_t *frm; 2942 2943 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2944 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2945 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2946 ieee80211_ref_node(ni); 2947 2948 m = ieee80211_getmgtframe(&frm, 2949 ic->ic_headroom + sizeof(struct ieee80211_frame), 2950 sizeof(uint16_t) + /* action+category */ 2951 IEEE80211_MESHGANN_BASE_SZ 2952 ); 2953 if (m != NULL) { 2954 /* 2955 * mesh link metric 2956 * [1] category 2957 * [1] action 2958 * [tlv] mesh gate announcement 2959 */ 2960 *frm++ = category; 2961 *frm++ = action; 2962 frm = ieee80211_add_meshgate(frm, ie); 2963 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2964 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 2965 } else { 2966 vap->iv_stats.is_tx_nobuf++; 2967 ieee80211_free_node(ni); 2968 return ENOMEM; 2969 } 2970 } 2971 2972 static void 2973 mesh_peer_timeout_setup(struct ieee80211_node *ni) 2974 { 2975 switch (ni->ni_mlstate) { 2976 case IEEE80211_NODE_MESH_HOLDING: 2977 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 2978 break; 2979 case IEEE80211_NODE_MESH_CONFIRMRCV: 2980 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 2981 break; 2982 case IEEE80211_NODE_MESH_IDLE: 2983 ni->ni_mltval = 0; 2984 break; 2985 default: 2986 ni->ni_mltval = ieee80211_mesh_retrytimeout; 2987 break; 2988 } 2989 if (ni->ni_mltval) 2990 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2991 mesh_peer_timeout_cb, ni); 2992 } 2993 2994 /* 2995 * Same as above but backoffs timer statisically 50%. 2996 */ 2997 static void 2998 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 2999 { 3000 uint32_t r; 3001 3002 r = arc4random(); 3003 ni->ni_mltval += r % ni->ni_mltval; 3004 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3005 ni); 3006 } 3007 3008 static __inline void 3009 mesh_peer_timeout_stop(struct ieee80211_node *ni) 3010 { 3011 callout_drain(&ni->ni_mltimer); 3012 } 3013 3014 static void 3015 mesh_peer_backoff_cb(void *arg) 3016 { 3017 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3018 3019 /* After backoff timeout, try to peer automatically again. */ 3020 ni->ni_mlhcnt = 0; 3021 } 3022 3023 /* 3024 * Mesh Peer Link Management FSM timeout handling. 3025 */ 3026 static void 3027 mesh_peer_timeout_cb(void *arg) 3028 { 3029 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3030 uint16_t args[3]; 3031 3032 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3033 ni, "mesh link timeout, state %d, retry counter %d", 3034 ni->ni_mlstate, ni->ni_mlrcnt); 3035 3036 switch (ni->ni_mlstate) { 3037 case IEEE80211_NODE_MESH_IDLE: 3038 case IEEE80211_NODE_MESH_ESTABLISHED: 3039 break; 3040 case IEEE80211_NODE_MESH_OPENSNT: 3041 case IEEE80211_NODE_MESH_OPENRCV: 3042 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3043 args[0] = ni->ni_mlpid; 3044 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3045 ieee80211_send_action(ni, 3046 IEEE80211_ACTION_CAT_SELF_PROT, 3047 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3048 ni->ni_mlrcnt = 0; 3049 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3050 mesh_peer_timeout_setup(ni); 3051 } else { 3052 args[0] = ni->ni_mlpid; 3053 ieee80211_send_action(ni, 3054 IEEE80211_ACTION_CAT_SELF_PROT, 3055 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3056 ni->ni_mlrcnt++; 3057 mesh_peer_timeout_backoff(ni); 3058 } 3059 break; 3060 case IEEE80211_NODE_MESH_CONFIRMRCV: 3061 args[0] = ni->ni_mlpid; 3062 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3063 ieee80211_send_action(ni, 3064 IEEE80211_ACTION_CAT_SELF_PROT, 3065 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3066 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3067 mesh_peer_timeout_setup(ni); 3068 break; 3069 case IEEE80211_NODE_MESH_HOLDING: 3070 ni->ni_mlhcnt++; 3071 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3072 callout_reset(&ni->ni_mlhtimer, 3073 ieee80211_mesh_backofftimeout, 3074 mesh_peer_backoff_cb, ni); 3075 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3076 break; 3077 } 3078 } 3079 3080 static int 3081 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3082 { 3083 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3084 3085 if (ie == NULL || ie[1] != ms->ms_idlen) 3086 return 1; 3087 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3088 } 3089 3090 /* 3091 * Check if we are using the same algorithms for this mesh. 3092 */ 3093 static int 3094 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3095 { 3096 const struct ieee80211_meshconf_ie *meshconf = 3097 (const struct ieee80211_meshconf_ie *) ie; 3098 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3099 3100 if (meshconf == NULL) 3101 return 1; 3102 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3103 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3104 "unknown path selection algorithm: 0x%x\n", 3105 meshconf->conf_pselid); 3106 return 1; 3107 } 3108 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3109 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3110 "unknown path metric algorithm: 0x%x\n", 3111 meshconf->conf_pmetid); 3112 return 1; 3113 } 3114 if (meshconf->conf_ccid != 0) { 3115 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3116 "unknown congestion control algorithm: 0x%x\n", 3117 meshconf->conf_ccid); 3118 return 1; 3119 } 3120 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3121 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3122 "unknown sync algorithm: 0x%x\n", 3123 meshconf->conf_syncid); 3124 return 1; 3125 } 3126 if (meshconf->conf_authid != 0) { 3127 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3128 "unknown auth auth algorithm: 0x%x\n", 3129 meshconf->conf_pselid); 3130 return 1; 3131 } 3132 /* Not accepting peers */ 3133 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3134 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3135 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3136 return 1; 3137 } 3138 return 0; 3139 } 3140 3141 static int 3142 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3143 const uint8_t *ie) 3144 { 3145 const struct ieee80211_meshpeer_ie *meshpeer = 3146 (const struct ieee80211_meshpeer_ie *) ie; 3147 3148 if (meshpeer == NULL || 3149 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3150 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3151 return 1; 3152 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3153 IEEE80211_DPRINTF(vap, 3154 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3155 "Only MPM protocol is supported (proto: 0x%02X)", 3156 meshpeer->peer_proto); 3157 return 1; 3158 } 3159 switch (subtype) { 3160 case IEEE80211_ACTION_MESHPEERING_OPEN: 3161 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3162 return 1; 3163 break; 3164 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3165 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3166 return 1; 3167 break; 3168 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3169 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3170 return 1; 3171 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3172 meshpeer->peer_linkid != 0) 3173 return 1; 3174 if (meshpeer->peer_rcode == 0) 3175 return 1; 3176 break; 3177 } 3178 return 0; 3179 } 3180 3181 /* 3182 * Add a Mesh ID IE to a frame. 3183 */ 3184 uint8_t * 3185 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3186 { 3187 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3188 3189 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3190 3191 *frm++ = IEEE80211_ELEMID_MESHID; 3192 *frm++ = ms->ms_idlen; 3193 memcpy(frm, ms->ms_id, ms->ms_idlen); 3194 return frm + ms->ms_idlen; 3195 } 3196 3197 /* 3198 * Add a Mesh Configuration IE to a frame. 3199 * For now just use HWMP routing, Airtime link metric, Null Congestion 3200 * Signaling, Null Sync Protocol and Null Authentication. 3201 */ 3202 uint8_t * 3203 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3204 { 3205 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3206 uint16_t caps; 3207 3208 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3209 3210 *frm++ = IEEE80211_ELEMID_MESHCONF; 3211 *frm++ = IEEE80211_MESH_CONF_SZ; 3212 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3213 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3214 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3215 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3216 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3217 /* NB: set the number of neighbors before the rest */ 3218 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3219 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3220 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3221 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3222 frm += 1; 3223 caps = 0; 3224 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3225 caps |= IEEE80211_MESHCONF_CAP_AP; 3226 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3227 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3228 *frm++ = caps; 3229 return frm; 3230 } 3231 3232 /* 3233 * Add a Mesh Peer Management IE to a frame. 3234 */ 3235 uint8_t * 3236 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3237 uint16_t peerid, uint16_t reason) 3238 { 3239 3240 KASSERT(localid != 0, ("localid == 0")); 3241 3242 *frm++ = IEEE80211_ELEMID_MESHPEER; 3243 switch (subtype) { 3244 case IEEE80211_ACTION_MESHPEERING_OPEN: 3245 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3246 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3247 ADDSHORT(frm, localid); /* local ID */ 3248 break; 3249 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3250 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3251 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3252 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3253 ADDSHORT(frm, localid); /* local ID */ 3254 ADDSHORT(frm, peerid); /* peer ID */ 3255 break; 3256 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3257 if (peerid) 3258 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3259 else 3260 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3261 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3262 ADDSHORT(frm, localid); /* local ID */ 3263 if (peerid) 3264 ADDSHORT(frm, peerid); /* peer ID */ 3265 ADDSHORT(frm, reason); 3266 break; 3267 } 3268 return frm; 3269 } 3270 3271 /* 3272 * Compute an Airtime Link Metric for the link with this node. 3273 * 3274 * Based on Draft 3.0 spec (11B.10, p.149). 3275 */ 3276 /* 3277 * Max 802.11s overhead. 3278 */ 3279 #define IEEE80211_MESH_MAXOVERHEAD \ 3280 (sizeof(struct ieee80211_qosframe_addr4) \ 3281 + sizeof(struct ieee80211_meshcntl_ae10) \ 3282 + sizeof(struct llc) \ 3283 + IEEE80211_ADDR_LEN \ 3284 + IEEE80211_WEP_IVLEN \ 3285 + IEEE80211_WEP_KIDLEN \ 3286 + IEEE80211_WEP_CRCLEN \ 3287 + IEEE80211_WEP_MICLEN \ 3288 + IEEE80211_CRC_LEN) 3289 uint32_t 3290 mesh_airtime_calc(struct ieee80211_node *ni) 3291 { 3292 #define M_BITS 8 3293 #define S_FACTOR (2 * M_BITS) 3294 struct ieee80211com *ic = ni->ni_ic; 3295 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3296 const static int nbits = 8192 << M_BITS; 3297 uint32_t overhead, rate, errrate; 3298 uint64_t res; 3299 3300 /* Time to transmit a frame */ 3301 rate = ni->ni_txrate; 3302 overhead = ieee80211_compute_duration(ic->ic_rt, 3303 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3304 /* Error rate in percentage */ 3305 /* XXX assuming small failures are ok */ 3306 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + 3307 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) 3308 / 100; 3309 res = (overhead + (nbits / rate)) * 3310 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3311 3312 return (uint32_t)(res >> S_FACTOR); 3313 #undef M_BITS 3314 #undef S_FACTOR 3315 } 3316 3317 /* 3318 * Add a Mesh Link Metric report IE to a frame. 3319 */ 3320 uint8_t * 3321 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3322 { 3323 *frm++ = IEEE80211_ELEMID_MESHLINK; 3324 *frm++ = 5; 3325 *frm++ = flags; 3326 ADDWORD(frm, metric); 3327 return frm; 3328 } 3329 3330 /* 3331 * Add a Mesh Gate Announcement IE to a frame. 3332 */ 3333 uint8_t * 3334 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3335 { 3336 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3337 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3338 *frm++ = ie->gann_flags; 3339 *frm++ = ie->gann_hopcount; 3340 *frm++ = ie->gann_ttl; 3341 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3342 frm += 6; 3343 ADDWORD(frm, ie->gann_seq); 3344 ADDSHORT(frm, ie->gann_interval); 3345 return frm; 3346 } 3347 #undef ADDSHORT 3348 #undef ADDWORD 3349 3350 /* 3351 * Initialize any mesh-specific node state. 3352 */ 3353 void 3354 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3355 { 3356 ni->ni_flags |= IEEE80211_NODE_QOS; 3357 callout_init(&ni->ni_mltimer, 1); 3358 callout_init(&ni->ni_mlhtimer, 1); 3359 } 3360 3361 /* 3362 * Cleanup any mesh-specific node state. 3363 */ 3364 void 3365 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3366 { 3367 struct ieee80211vap *vap = ni->ni_vap; 3368 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3369 3370 callout_drain(&ni->ni_mltimer); 3371 callout_drain(&ni->ni_mlhtimer); 3372 /* NB: short-circuit callbacks after mesh_vdetach */ 3373 if (vap->iv_mesh != NULL) 3374 ms->ms_ppath->mpp_peerdown(ni); 3375 } 3376 3377 void 3378 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3379 { 3380 ni->ni_meshidlen = ie[1]; 3381 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3382 } 3383 3384 /* 3385 * Setup mesh-specific node state on neighbor discovery. 3386 */ 3387 void 3388 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3389 const struct ieee80211_frame *wh, 3390 const struct ieee80211_scanparams *sp) 3391 { 3392 ieee80211_parse_meshid(ni, sp->meshid); 3393 } 3394 3395 void 3396 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3397 struct ieee80211_beacon_offsets *bo) 3398 { 3399 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3400 3401 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3402 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3403 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3404 } 3405 } 3406 3407 static int 3408 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3409 { 3410 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3411 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3412 struct ieee80211_mesh_route *rt; 3413 struct ieee80211req_mesh_route *imr; 3414 size_t len, off; 3415 uint8_t *p; 3416 int error; 3417 3418 if (vap->iv_opmode != IEEE80211_M_MBSS) 3419 return ENOSYS; 3420 3421 error = 0; 3422 switch (ireq->i_type) { 3423 case IEEE80211_IOC_MESH_ID: 3424 ireq->i_len = ms->ms_idlen; 3425 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3426 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3427 break; 3428 case IEEE80211_IOC_MESH_AP: 3429 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3430 break; 3431 case IEEE80211_IOC_MESH_FWRD: 3432 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3433 break; 3434 case IEEE80211_IOC_MESH_GATE: 3435 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3436 break; 3437 case IEEE80211_IOC_MESH_TTL: 3438 ireq->i_val = ms->ms_ttl; 3439 break; 3440 case IEEE80211_IOC_MESH_RTCMD: 3441 switch (ireq->i_val) { 3442 case IEEE80211_MESH_RTCMD_LIST: 3443 len = 0; 3444 MESH_RT_LOCK(ms); 3445 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3446 len += sizeof(*imr); 3447 } 3448 MESH_RT_UNLOCK(ms); 3449 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3450 ireq->i_len = len; 3451 return ENOMEM; 3452 } 3453 ireq->i_len = len; 3454 /* XXX M_WAIT? */ 3455 p = IEEE80211_MALLOC(len, M_TEMP, 3456 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 3457 if (p == NULL) 3458 return ENOMEM; 3459 off = 0; 3460 MESH_RT_LOCK(ms); 3461 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3462 if (off >= len) 3463 break; 3464 imr = (struct ieee80211req_mesh_route *) 3465 (p + off); 3466 IEEE80211_ADDR_COPY(imr->imr_dest, 3467 rt->rt_dest); 3468 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3469 rt->rt_nexthop); 3470 imr->imr_metric = rt->rt_metric; 3471 imr->imr_nhops = rt->rt_nhops; 3472 imr->imr_lifetime = 3473 ieee80211_mesh_rt_update(rt, 0); 3474 imr->imr_lastmseq = rt->rt_lastmseq; 3475 imr->imr_flags = rt->rt_flags; /* last */ 3476 off += sizeof(*imr); 3477 } 3478 MESH_RT_UNLOCK(ms); 3479 error = copyout(p, (uint8_t *)ireq->i_data, 3480 ireq->i_len); 3481 IEEE80211_FREE(p, M_TEMP); 3482 break; 3483 case IEEE80211_MESH_RTCMD_FLUSH: 3484 case IEEE80211_MESH_RTCMD_ADD: 3485 case IEEE80211_MESH_RTCMD_DELETE: 3486 return EINVAL; 3487 default: 3488 return ENOSYS; 3489 } 3490 break; 3491 case IEEE80211_IOC_MESH_PR_METRIC: 3492 len = strlen(ms->ms_pmetric->mpm_descr); 3493 if (ireq->i_len < len) 3494 return EINVAL; 3495 ireq->i_len = len; 3496 error = copyout(ms->ms_pmetric->mpm_descr, 3497 (uint8_t *)ireq->i_data, len); 3498 break; 3499 case IEEE80211_IOC_MESH_PR_PATH: 3500 len = strlen(ms->ms_ppath->mpp_descr); 3501 if (ireq->i_len < len) 3502 return EINVAL; 3503 ireq->i_len = len; 3504 error = copyout(ms->ms_ppath->mpp_descr, 3505 (uint8_t *)ireq->i_data, len); 3506 break; 3507 default: 3508 return ENOSYS; 3509 } 3510 3511 return error; 3512 } 3513 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3514 3515 static int 3516 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3517 { 3518 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3519 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3520 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3521 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3522 int error; 3523 3524 if (vap->iv_opmode != IEEE80211_M_MBSS) 3525 return ENOSYS; 3526 3527 error = 0; 3528 switch (ireq->i_type) { 3529 case IEEE80211_IOC_MESH_ID: 3530 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3531 return EINVAL; 3532 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3533 if (error != 0) 3534 break; 3535 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3536 ms->ms_idlen = ireq->i_len; 3537 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3538 error = ENETRESET; 3539 break; 3540 case IEEE80211_IOC_MESH_AP: 3541 if (ireq->i_val) 3542 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3543 else 3544 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3545 error = ENETRESET; 3546 break; 3547 case IEEE80211_IOC_MESH_FWRD: 3548 if (ireq->i_val) 3549 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3550 else 3551 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3552 mesh_gatemode_setup(vap); 3553 break; 3554 case IEEE80211_IOC_MESH_GATE: 3555 if (ireq->i_val) 3556 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3557 else 3558 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3559 break; 3560 case IEEE80211_IOC_MESH_TTL: 3561 ms->ms_ttl = (uint8_t) ireq->i_val; 3562 break; 3563 case IEEE80211_IOC_MESH_RTCMD: 3564 switch (ireq->i_val) { 3565 case IEEE80211_MESH_RTCMD_LIST: 3566 return EINVAL; 3567 case IEEE80211_MESH_RTCMD_FLUSH: 3568 ieee80211_mesh_rt_flush(vap); 3569 break; 3570 case IEEE80211_MESH_RTCMD_ADD: 3571 error = copyin(ireq->i_data, tmpaddr, 3572 IEEE80211_ADDR_LEN); 3573 if (error != 0) 3574 break; 3575 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, tmpaddr) || 3576 IEEE80211_ADDR_EQ(broadcastaddr, tmpaddr)) 3577 return EINVAL; 3578 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3579 break; 3580 case IEEE80211_MESH_RTCMD_DELETE: 3581 error = copyin(ireq->i_data, tmpaddr, 3582 IEEE80211_ADDR_LEN); 3583 if (error != 0) 3584 break; 3585 ieee80211_mesh_rt_del(vap, tmpaddr); 3586 break; 3587 default: 3588 return ENOSYS; 3589 } 3590 break; 3591 case IEEE80211_IOC_MESH_PR_METRIC: 3592 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3593 if (error == 0) { 3594 error = mesh_select_proto_metric(vap, tmpproto); 3595 if (error == 0) 3596 error = ENETRESET; 3597 } 3598 break; 3599 case IEEE80211_IOC_MESH_PR_PATH: 3600 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3601 if (error == 0) { 3602 error = mesh_select_proto_path(vap, tmpproto); 3603 if (error == 0) 3604 error = ENETRESET; 3605 } 3606 break; 3607 default: 3608 return ENOSYS; 3609 } 3610 return error; 3611 } 3612 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3613