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sys/net80211/ieee80211_mesh.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2009 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * This software was developed by Rui Paulo under sponsorship from the 8 * FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 #ifdef __FreeBSD__ 33 __FBSDID("$FreeBSD: releng/12.0/sys/net80211/ieee80211_mesh.c 326272 2017-11-27 15:23:17Z pfg $"); 34 #endif 35 36 /* 37 * IEEE 802.11s Mesh Point (MBSS) support. 38 * 39 * Based on March 2009, D3.0 802.11s draft spec. 40 */ 41 #include "opt_inet.h" 42 #include "opt_wlan.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/mbuf.h> 47 #include <sys/malloc.h> 48 #include <sys/kernel.h> 49 50 #include <sys/socket.h> 51 #include <sys/sockio.h> 52 #include <sys/endian.h> 53 #include <sys/errno.h> 54 #include <sys/proc.h> 55 #include <sys/sysctl.h> 56 57 #include <net/bpf.h> 58 #include <net/if.h> 59 #include <net/if_var.h> 60 #include <net/if_media.h> 61 #include <net/if_llc.h> 62 #include <net/ethernet.h> 63 64 #include <net80211/ieee80211_var.h> 65 #include <net80211/ieee80211_action.h> 66 #ifdef IEEE80211_SUPPORT_SUPERG 67 #include <net80211/ieee80211_superg.h> 68 #endif 69 #include <net80211/ieee80211_input.h> 70 #include <net80211/ieee80211_mesh.h> 71 72 static void mesh_rt_flush_invalid(struct ieee80211vap *); 73 static int mesh_select_proto_path(struct ieee80211vap *, const char *); 74 static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 75 static void mesh_vattach(struct ieee80211vap *); 76 static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 77 static void mesh_rt_cleanup_cb(void *); 78 static void mesh_gatemode_setup(struct ieee80211vap *); 79 static void mesh_gatemode_cb(void *); 80 static void mesh_linkchange(struct ieee80211_node *, 81 enum ieee80211_mesh_mlstate); 82 static void mesh_checkid(void *, struct ieee80211_node *); 83 static uint32_t mesh_generateid(struct ieee80211vap *); 84 static int mesh_checkpseq(struct ieee80211vap *, 85 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 86 static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, 87 struct ieee80211_mesh_route *); 88 static void mesh_forward(struct ieee80211vap *, struct mbuf *, 89 const struct ieee80211_meshcntl *); 90 static int mesh_input(struct ieee80211_node *, struct mbuf *, 91 const struct ieee80211_rx_stats *rxs, int, int); 92 static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 93 const struct ieee80211_rx_stats *rxs, int, int); 94 static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 95 static void mesh_peer_timeout_setup(struct ieee80211_node *); 96 static void mesh_peer_timeout_backoff(struct ieee80211_node *); 97 static void mesh_peer_timeout_cb(void *); 98 static __inline void 99 mesh_peer_timeout_stop(struct ieee80211_node *); 100 static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 101 static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 102 static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 103 const uint8_t *); 104 uint32_t mesh_airtime_calc(struct ieee80211_node *); 105 106 /* 107 * Timeout values come from the specification and are in milliseconds. 108 */ 109 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 110 "IEEE 802.11s parameters"); 111 static int ieee80211_mesh_gateint = -1; 112 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW, 113 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 114 "mesh gate interval (ms)"); 115 static int ieee80211_mesh_retrytimeout = -1; 116 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, 117 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 118 "Retry timeout (msec)"); 119 static int ieee80211_mesh_holdingtimeout = -1; 120 121 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, 122 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 123 "Holding state timeout (msec)"); 124 static int ieee80211_mesh_confirmtimeout = -1; 125 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, 126 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 127 "Confirm state timeout (msec)"); 128 static int ieee80211_mesh_backofftimeout = -1; 129 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW, 130 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 131 "Backoff timeout (msec). This is to throutles peering forever when " 132 "not receiving answer or is rejected by a neighbor"); 133 static int ieee80211_mesh_maxretries = 2; 134 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW, 135 &ieee80211_mesh_maxretries, 0, 136 "Maximum retries during peer link establishment"); 137 static int ieee80211_mesh_maxholding = 2; 138 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW, 139 &ieee80211_mesh_maxholding, 0, 140 "Maximum times we are allowed to transition to HOLDING state before " 141 "backinoff during peer link establishment"); 142 143 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 144 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 145 146 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 147 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 148 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 149 static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 150 static ieee80211_recv_action_func mesh_recv_action_meshgate; 151 152 static ieee80211_send_action_func mesh_send_action_meshpeering_open; 153 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 154 static ieee80211_send_action_func mesh_send_action_meshpeering_close; 155 static ieee80211_send_action_func mesh_send_action_meshlmetric; 156 static ieee80211_send_action_func mesh_send_action_meshgate; 157 158 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 159 .mpm_descr = "AIRTIME", 160 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 161 .mpm_metric = mesh_airtime_calc, 162 }; 163 164 static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 165 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 166 167 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 168 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 169 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 170 171 /* The longer one of the lifetime should be stored as new lifetime */ 172 #define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 173 174 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 175 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 176 177 /* 178 * Helper functions to manipulate the Mesh routing table. 179 */ 180 181 static struct ieee80211_mesh_route * 182 mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 183 const uint8_t dest[IEEE80211_ADDR_LEN]) 184 { 185 struct ieee80211_mesh_route *rt; 186 187 MESH_RT_LOCK_ASSERT(ms); 188 189 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 190 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 191 return rt; 192 } 193 return NULL; 194 } 195 196 static struct ieee80211_mesh_route * 197 mesh_rt_add_locked(struct ieee80211vap *vap, 198 const uint8_t dest[IEEE80211_ADDR_LEN]) 199 { 200 struct ieee80211_mesh_state *ms = vap->iv_mesh; 201 struct ieee80211_mesh_route *rt; 202 203 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 204 ("%s: adding broadcast to the routing table", __func__)); 205 206 MESH_RT_LOCK_ASSERT(ms); 207 208 rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) + 209 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, 210 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 211 if (rt != NULL) { 212 rt->rt_vap = vap; 213 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 214 rt->rt_priv = (void *)ALIGN(&rt[1]); 215 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT"); 216 callout_init(&rt->rt_discovery, 1); 217 rt->rt_updtime = ticks; /* create time */ 218 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 219 } 220 return rt; 221 } 222 223 struct ieee80211_mesh_route * 224 ieee80211_mesh_rt_find(struct ieee80211vap *vap, 225 const uint8_t dest[IEEE80211_ADDR_LEN]) 226 { 227 struct ieee80211_mesh_state *ms = vap->iv_mesh; 228 struct ieee80211_mesh_route *rt; 229 230 MESH_RT_LOCK(ms); 231 rt = mesh_rt_find_locked(ms, dest); 232 MESH_RT_UNLOCK(ms); 233 return rt; 234 } 235 236 struct ieee80211_mesh_route * 237 ieee80211_mesh_rt_add(struct ieee80211vap *vap, 238 const uint8_t dest[IEEE80211_ADDR_LEN]) 239 { 240 struct ieee80211_mesh_state *ms = vap->iv_mesh; 241 struct ieee80211_mesh_route *rt; 242 243 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 244 ("%s: duplicate entry in the routing table", __func__)); 245 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 246 ("%s: adding self to the routing table", __func__)); 247 248 MESH_RT_LOCK(ms); 249 rt = mesh_rt_add_locked(vap, dest); 250 MESH_RT_UNLOCK(ms); 251 return rt; 252 } 253 254 /* 255 * Update the route lifetime and returns the updated lifetime. 256 * If new_lifetime is zero and route is timedout it will be invalidated. 257 * new_lifetime is in msec 258 */ 259 int 260 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 261 { 262 int timesince, now; 263 uint32_t lifetime = 0; 264 265 KASSERT(rt != NULL, ("route is NULL")); 266 267 now = ticks; 268 MESH_RT_ENTRY_LOCK(rt); 269 270 /* dont clobber a proxy entry gated by us */ 271 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 272 MESH_RT_ENTRY_UNLOCK(rt); 273 return rt->rt_lifetime; 274 } 275 276 timesince = ticks_to_msecs(now - rt->rt_updtime); 277 rt->rt_updtime = now; 278 if (timesince >= rt->rt_lifetime) { 279 if (new_lifetime != 0) { 280 rt->rt_lifetime = new_lifetime; 281 } 282 else { 283 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 284 rt->rt_lifetime = 0; 285 } 286 } else { 287 /* update what is left of lifetime */ 288 rt->rt_lifetime = rt->rt_lifetime - timesince; 289 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 290 new_lifetime, rt->rt_lifetime); 291 } 292 lifetime = rt->rt_lifetime; 293 MESH_RT_ENTRY_UNLOCK(rt); 294 295 return lifetime; 296 } 297 298 /* 299 * Add a proxy route (as needed) for the specified destination. 300 */ 301 void 302 ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 303 const uint8_t dest[IEEE80211_ADDR_LEN]) 304 { 305 struct ieee80211_mesh_state *ms = vap->iv_mesh; 306 struct ieee80211_mesh_route *rt; 307 308 MESH_RT_LOCK(ms); 309 rt = mesh_rt_find_locked(ms, dest); 310 if (rt == NULL) { 311 rt = mesh_rt_add_locked(vap, dest); 312 if (rt == NULL) { 313 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 314 "%s", "unable to add proxy entry"); 315 vap->iv_stats.is_mesh_rtaddfailed++; 316 } else { 317 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 318 "%s", "add proxy entry"); 319 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 320 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 321 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 322 | IEEE80211_MESHRT_FLAGS_PROXY; 323 } 324 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 325 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 326 ("no proxy flag for poxy entry")); 327 struct ieee80211com *ic = vap->iv_ic; 328 /* 329 * Fix existing entry created by received frames from 330 * stations that have some memory of dest. We also 331 * flush any frames held on the staging queue; delivering 332 * them is too much trouble right now. 333 */ 334 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 335 "%s", "fix proxy entry"); 336 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 337 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 338 | IEEE80211_MESHRT_FLAGS_PROXY; 339 /* XXX belongs in hwmp */ 340 ieee80211_ageq_drain_node(&ic->ic_stageq, 341 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 342 /* XXX stat? */ 343 } 344 MESH_RT_UNLOCK(ms); 345 } 346 347 static __inline void 348 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 349 { 350 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 351 /* 352 * Grab the lock before destroying it, to be sure no one else 353 * is holding the route. 354 */ 355 MESH_RT_ENTRY_LOCK(rt); 356 callout_drain(&rt->rt_discovery); 357 MESH_RT_ENTRY_LOCK_DESTROY(rt); 358 IEEE80211_FREE(rt, M_80211_MESH_RT); 359 } 360 361 void 362 ieee80211_mesh_rt_del(struct ieee80211vap *vap, 363 const uint8_t dest[IEEE80211_ADDR_LEN]) 364 { 365 struct ieee80211_mesh_state *ms = vap->iv_mesh; 366 struct ieee80211_mesh_route *rt, *next; 367 368 MESH_RT_LOCK(ms); 369 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 370 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 371 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 372 ms->ms_ppath->mpp_senderror(vap, dest, rt, 373 IEEE80211_REASON_MESH_PERR_NO_PROXY); 374 } else { 375 ms->ms_ppath->mpp_senderror(vap, dest, rt, 376 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 377 } 378 mesh_rt_del(ms, rt); 379 MESH_RT_UNLOCK(ms); 380 return; 381 } 382 } 383 MESH_RT_UNLOCK(ms); 384 } 385 386 void 387 ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 388 { 389 struct ieee80211_mesh_state *ms = vap->iv_mesh; 390 struct ieee80211_mesh_route *rt, *next; 391 392 if (ms == NULL) 393 return; 394 MESH_RT_LOCK(ms); 395 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 396 mesh_rt_del(ms, rt); 397 MESH_RT_UNLOCK(ms); 398 } 399 400 void 401 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 402 const uint8_t peer[IEEE80211_ADDR_LEN]) 403 { 404 struct ieee80211_mesh_state *ms = vap->iv_mesh; 405 struct ieee80211_mesh_route *rt, *next; 406 407 MESH_RT_LOCK(ms); 408 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 409 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 410 mesh_rt_del(ms, rt); 411 } 412 MESH_RT_UNLOCK(ms); 413 } 414 415 /* 416 * Flush expired routing entries, i.e. those in invalid state for 417 * some time. 418 */ 419 static void 420 mesh_rt_flush_invalid(struct ieee80211vap *vap) 421 { 422 struct ieee80211_mesh_state *ms = vap->iv_mesh; 423 struct ieee80211_mesh_route *rt, *next; 424 425 if (ms == NULL) 426 return; 427 MESH_RT_LOCK(ms); 428 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 429 /* Discover paths will be deleted by their own callout */ 430 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 431 continue; 432 ieee80211_mesh_rt_update(rt, 0); 433 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 434 mesh_rt_del(ms, rt); 435 } 436 MESH_RT_UNLOCK(ms); 437 } 438 439 int 440 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 441 { 442 int i, firstempty = -1; 443 444 for (i = 0; i < nitems(mesh_proto_paths); i++) { 445 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 446 IEEE80211_MESH_PROTO_DSZ) == 0) 447 return EEXIST; 448 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 449 firstempty = i; 450 } 451 if (firstempty < 0) 452 return ENOSPC; 453 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 454 mesh_proto_paths[firstempty].mpp_active = 1; 455 return 0; 456 } 457 458 int 459 ieee80211_mesh_register_proto_metric(const struct 460 ieee80211_mesh_proto_metric *mpm) 461 { 462 int i, firstempty = -1; 463 464 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 465 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 466 IEEE80211_MESH_PROTO_DSZ) == 0) 467 return EEXIST; 468 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 469 firstempty = i; 470 } 471 if (firstempty < 0) 472 return ENOSPC; 473 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 474 mesh_proto_metrics[firstempty].mpm_active = 1; 475 return 0; 476 } 477 478 static int 479 mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 480 { 481 struct ieee80211_mesh_state *ms = vap->iv_mesh; 482 int i; 483 484 for (i = 0; i < nitems(mesh_proto_paths); i++) { 485 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 486 ms->ms_ppath = &mesh_proto_paths[i]; 487 return 0; 488 } 489 } 490 return ENOENT; 491 } 492 493 static int 494 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 495 { 496 struct ieee80211_mesh_state *ms = vap->iv_mesh; 497 int i; 498 499 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 500 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 501 ms->ms_pmetric = &mesh_proto_metrics[i]; 502 return 0; 503 } 504 } 505 return ENOENT; 506 } 507 508 static void 509 mesh_gatemode_setup(struct ieee80211vap *vap) 510 { 511 struct ieee80211_mesh_state *ms = vap->iv_mesh; 512 513 /* 514 * NB: When a mesh gate is running as a ROOT it shall 515 * not send out periodic GANNs but instead mark the 516 * mesh gate flag for the corresponding proactive PREQ 517 * and RANN frames. 518 */ 519 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 520 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 521 callout_drain(&ms->ms_gatetimer); 522 return ; 523 } 524 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 525 mesh_gatemode_cb, vap); 526 } 527 528 static void 529 mesh_gatemode_cb(void *arg) 530 { 531 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 532 struct ieee80211_mesh_state *ms = vap->iv_mesh; 533 struct ieee80211_meshgann_ie gann; 534 535 gann.gann_flags = 0; /* Reserved */ 536 gann.gann_hopcount = 0; 537 gann.gann_ttl = ms->ms_ttl; 538 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 539 gann.gann_seq = ms->ms_gateseq++; 540 gann.gann_interval = ieee80211_mesh_gateint; 541 542 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 543 "send broadcast GANN (seq %u)", gann.gann_seq); 544 545 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 546 IEEE80211_ACTION_MESH_GANN, &gann); 547 mesh_gatemode_setup(vap); 548 } 549 550 static void 551 ieee80211_mesh_init(void) 552 { 553 554 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 555 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 556 557 /* 558 * Setup mesh parameters that depends on the clock frequency. 559 */ 560 ieee80211_mesh_gateint = msecs_to_ticks(10000); 561 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 562 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 563 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 564 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 565 566 /* 567 * Register action frame handlers. 568 */ 569 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 570 IEEE80211_ACTION_MESHPEERING_OPEN, 571 mesh_recv_action_meshpeering_open); 572 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 573 IEEE80211_ACTION_MESHPEERING_CONFIRM, 574 mesh_recv_action_meshpeering_confirm); 575 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 576 IEEE80211_ACTION_MESHPEERING_CLOSE, 577 mesh_recv_action_meshpeering_close); 578 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 579 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 580 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 581 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 582 583 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 584 IEEE80211_ACTION_MESHPEERING_OPEN, 585 mesh_send_action_meshpeering_open); 586 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 587 IEEE80211_ACTION_MESHPEERING_CONFIRM, 588 mesh_send_action_meshpeering_confirm); 589 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 590 IEEE80211_ACTION_MESHPEERING_CLOSE, 591 mesh_send_action_meshpeering_close); 592 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 593 IEEE80211_ACTION_MESH_LMETRIC, 594 mesh_send_action_meshlmetric); 595 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 596 IEEE80211_ACTION_MESH_GANN, 597 mesh_send_action_meshgate); 598 599 /* 600 * Register Airtime Link Metric. 601 */ 602 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 603 604 } 605 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 606 607 void 608 ieee80211_mesh_attach(struct ieee80211com *ic) 609 { 610 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 611 } 612 613 void 614 ieee80211_mesh_detach(struct ieee80211com *ic) 615 { 616 } 617 618 static void 619 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 620 { 621 struct ieee80211com *ic = ni->ni_ic; 622 uint16_t args[3]; 623 624 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 625 args[0] = ni->ni_mlpid; 626 args[1] = ni->ni_mllid; 627 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 628 ieee80211_send_action(ni, 629 IEEE80211_ACTION_CAT_SELF_PROT, 630 IEEE80211_ACTION_MESHPEERING_CLOSE, 631 args); 632 } 633 callout_drain(&ni->ni_mltimer); 634 /* XXX belongs in hwmp */ 635 ieee80211_ageq_drain_node(&ic->ic_stageq, 636 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 637 } 638 639 static void 640 mesh_vdetach(struct ieee80211vap *vap) 641 { 642 struct ieee80211_mesh_state *ms = vap->iv_mesh; 643 644 callout_drain(&ms->ms_cleantimer); 645 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 646 NULL); 647 ieee80211_mesh_rt_flush(vap); 648 MESH_RT_LOCK_DESTROY(ms); 649 ms->ms_ppath->mpp_vdetach(vap); 650 IEEE80211_FREE(vap->iv_mesh, M_80211_VAP); 651 vap->iv_mesh = NULL; 652 } 653 654 static void 655 mesh_vattach(struct ieee80211vap *vap) 656 { 657 struct ieee80211_mesh_state *ms; 658 vap->iv_newstate = mesh_newstate; 659 vap->iv_input = mesh_input; 660 vap->iv_opdetach = mesh_vdetach; 661 vap->iv_recv_mgmt = mesh_recv_mgmt; 662 vap->iv_recv_ctl = mesh_recv_ctl; 663 ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 664 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 665 if (ms == NULL) { 666 printf("%s: couldn't alloc MBSS state\n", __func__); 667 return; 668 } 669 vap->iv_mesh = ms; 670 ms->ms_seq = 0; 671 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 672 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 673 TAILQ_INIT(&ms->ms_known_gates); 674 TAILQ_INIT(&ms->ms_routes); 675 MESH_RT_LOCK_INIT(ms, "MBSS"); 676 callout_init(&ms->ms_cleantimer, 1); 677 callout_init(&ms->ms_gatetimer, 1); 678 ms->ms_gateseq = 0; 679 mesh_select_proto_metric(vap, "AIRTIME"); 680 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 681 mesh_select_proto_path(vap, "HWMP"); 682 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 683 ms->ms_ppath->mpp_vattach(vap); 684 } 685 686 /* 687 * IEEE80211_M_MBSS vap state machine handler. 688 */ 689 static int 690 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 691 { 692 struct ieee80211_mesh_state *ms = vap->iv_mesh; 693 struct ieee80211com *ic = vap->iv_ic; 694 struct ieee80211_node *ni; 695 enum ieee80211_state ostate; 696 697 IEEE80211_LOCK_ASSERT(ic); 698 699 ostate = vap->iv_state; 700 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 701 __func__, ieee80211_state_name[ostate], 702 ieee80211_state_name[nstate], arg); 703 vap->iv_state = nstate; /* state transition */ 704 if (ostate != IEEE80211_S_SCAN) 705 ieee80211_cancel_scan(vap); /* background scan */ 706 ni = vap->iv_bss; /* NB: no reference held */ 707 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 708 callout_drain(&ms->ms_cleantimer); 709 callout_drain(&ms->ms_gatetimer); 710 } 711 switch (nstate) { 712 case IEEE80211_S_INIT: 713 switch (ostate) { 714 case IEEE80211_S_SCAN: 715 ieee80211_cancel_scan(vap); 716 break; 717 case IEEE80211_S_CAC: 718 ieee80211_dfs_cac_stop(vap); 719 break; 720 case IEEE80211_S_RUN: 721 ieee80211_iterate_nodes(&ic->ic_sta, 722 mesh_vdetach_peers, NULL); 723 break; 724 default: 725 break; 726 } 727 if (ostate != IEEE80211_S_INIT) { 728 /* NB: optimize INIT -> INIT case */ 729 ieee80211_reset_bss(vap); 730 ieee80211_mesh_rt_flush(vap); 731 } 732 break; 733 case IEEE80211_S_SCAN: 734 switch (ostate) { 735 case IEEE80211_S_INIT: 736 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 737 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 738 ms->ms_idlen != 0) { 739 /* 740 * Already have a channel and a mesh ID; bypass 741 * the scan and startup immediately. 742 */ 743 ieee80211_create_ibss(vap, vap->iv_des_chan); 744 break; 745 } 746 /* 747 * Initiate a scan. We can come here as a result 748 * of an IEEE80211_IOC_SCAN_REQ too in which case 749 * the vap will be marked with IEEE80211_FEXT_SCANREQ 750 * and the scan request parameters will be present 751 * in iv_scanreq. Otherwise we do the default. 752 */ 753 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 754 ieee80211_check_scan(vap, 755 vap->iv_scanreq_flags, 756 vap->iv_scanreq_duration, 757 vap->iv_scanreq_mindwell, 758 vap->iv_scanreq_maxdwell, 759 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 760 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 761 } else 762 ieee80211_check_scan_current(vap); 763 break; 764 default: 765 break; 766 } 767 break; 768 case IEEE80211_S_CAC: 769 /* 770 * Start CAC on a DFS channel. We come here when starting 771 * a bss on a DFS channel (see ieee80211_create_ibss). 772 */ 773 ieee80211_dfs_cac_start(vap); 774 break; 775 case IEEE80211_S_RUN: 776 switch (ostate) { 777 case IEEE80211_S_INIT: 778 /* 779 * Already have a channel; bypass the 780 * scan and startup immediately. 781 * Note that ieee80211_create_ibss will call 782 * back to do a RUN->RUN state change. 783 */ 784 ieee80211_create_ibss(vap, 785 ieee80211_ht_adjust_channel(ic, 786 ic->ic_curchan, vap->iv_flags_ht)); 787 /* NB: iv_bss is changed on return */ 788 break; 789 case IEEE80211_S_CAC: 790 /* 791 * NB: This is the normal state change when CAC 792 * expires and no radar was detected; no need to 793 * clear the CAC timer as it's already expired. 794 */ 795 /* fall thru... */ 796 case IEEE80211_S_CSA: 797 #if 0 798 /* 799 * Shorten inactivity timer of associated stations 800 * to weed out sta's that don't follow a CSA. 801 */ 802 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 803 #endif 804 /* 805 * Update bss node channel to reflect where 806 * we landed after CSA. 807 */ 808 ieee80211_node_set_chan(ni, 809 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 810 ieee80211_htchanflags(ni->ni_chan))); 811 /* XXX bypass debug msgs */ 812 break; 813 case IEEE80211_S_SCAN: 814 case IEEE80211_S_RUN: 815 #ifdef IEEE80211_DEBUG 816 if (ieee80211_msg_debug(vap)) { 817 ieee80211_note(vap, 818 "synchronized with %s meshid ", 819 ether_sprintf(ni->ni_meshid)); 820 ieee80211_print_essid(ni->ni_meshid, 821 ni->ni_meshidlen); 822 /* XXX MCS/HT */ 823 printf(" channel %d\n", 824 ieee80211_chan2ieee(ic, ic->ic_curchan)); 825 } 826 #endif 827 break; 828 default: 829 break; 830 } 831 ieee80211_node_authorize(ni); 832 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 833 mesh_rt_cleanup_cb, vap); 834 mesh_gatemode_setup(vap); 835 break; 836 default: 837 break; 838 } 839 /* NB: ostate not nstate */ 840 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 841 return 0; 842 } 843 844 static void 845 mesh_rt_cleanup_cb(void *arg) 846 { 847 struct ieee80211vap *vap = arg; 848 struct ieee80211_mesh_state *ms = vap->iv_mesh; 849 850 mesh_rt_flush_invalid(vap); 851 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 852 mesh_rt_cleanup_cb, vap); 853 } 854 855 /* 856 * Mark a mesh STA as gate and return a pointer to it. 857 * If this is first time, we create a new gate route. 858 * Always update the path route to this mesh gate. 859 */ 860 struct ieee80211_mesh_gate_route * 861 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 862 struct ieee80211_mesh_route *rt) 863 { 864 struct ieee80211_mesh_state *ms = vap->iv_mesh; 865 struct ieee80211_mesh_gate_route *gr = NULL, *next; 866 int found = 0; 867 868 MESH_RT_LOCK(ms); 869 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 870 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 871 found = 1; 872 break; 873 } 874 } 875 876 if (!found) { 877 /* New mesh gate add it to known table. */ 878 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 879 "%s", "stored new gate information from pro-PREQ."); 880 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 881 M_80211_MESH_GT_RT, 882 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 883 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 884 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 885 } 886 gr->gr_route = rt; 887 /* TODO: link from path route to gate route */ 888 MESH_RT_UNLOCK(ms); 889 890 return gr; 891 } 892 893 894 /* 895 * Helper function to note the Mesh Peer Link FSM change. 896 */ 897 static void 898 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 899 { 900 struct ieee80211vap *vap = ni->ni_vap; 901 struct ieee80211_mesh_state *ms = vap->iv_mesh; 902 #ifdef IEEE80211_DEBUG 903 static const char *meshlinkstates[] = { 904 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 905 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 906 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 907 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 908 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 909 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 910 }; 911 #endif 912 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 913 ni, "peer link: %s -> %s", 914 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 915 916 /* track neighbor count */ 917 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 918 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 919 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 920 ms->ms_neighbors++; 921 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 922 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 923 state != IEEE80211_NODE_MESH_ESTABLISHED) { 924 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 925 ms->ms_neighbors--; 926 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 927 } 928 ni->ni_mlstate = state; 929 switch (state) { 930 case IEEE80211_NODE_MESH_HOLDING: 931 ms->ms_ppath->mpp_peerdown(ni); 932 break; 933 case IEEE80211_NODE_MESH_ESTABLISHED: 934 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 935 break; 936 default: 937 break; 938 } 939 } 940 941 /* 942 * Helper function to generate a unique local ID required for mesh 943 * peer establishment. 944 */ 945 static void 946 mesh_checkid(void *arg, struct ieee80211_node *ni) 947 { 948 uint16_t *r = arg; 949 950 if (*r == ni->ni_mllid) 951 *(uint16_t *)arg = 0; 952 } 953 954 static uint32_t 955 mesh_generateid(struct ieee80211vap *vap) 956 { 957 int maxiter = 4; 958 uint16_t r; 959 960 do { 961 get_random_bytes(&r, 2); 962 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 963 maxiter--; 964 } while (r == 0 && maxiter > 0); 965 return r; 966 } 967 968 /* 969 * Verifies if we already received this packet by checking its 970 * sequence number. 971 * Returns 0 if the frame is to be accepted, 1 otherwise. 972 */ 973 static int 974 mesh_checkpseq(struct ieee80211vap *vap, 975 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 976 { 977 struct ieee80211_mesh_route *rt; 978 979 rt = ieee80211_mesh_rt_find(vap, source); 980 if (rt == NULL) { 981 rt = ieee80211_mesh_rt_add(vap, source); 982 if (rt == NULL) { 983 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 984 "%s", "add mcast route failed"); 985 vap->iv_stats.is_mesh_rtaddfailed++; 986 return 1; 987 } 988 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 989 "add mcast route, mesh seqno %d", seq); 990 rt->rt_lastmseq = seq; 991 return 0; 992 } 993 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 994 return 1; 995 } else { 996 rt->rt_lastmseq = seq; 997 return 0; 998 } 999 } 1000 1001 /* 1002 * Iterate the routing table and locate the next hop. 1003 */ 1004 struct ieee80211_node * 1005 ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1006 const uint8_t dest[IEEE80211_ADDR_LEN]) 1007 { 1008 struct ieee80211_mesh_route *rt; 1009 1010 rt = ieee80211_mesh_rt_find(vap, dest); 1011 if (rt == NULL) 1012 return NULL; 1013 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1014 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1015 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1016 /* XXX stat */ 1017 return NULL; 1018 } 1019 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1020 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1021 if (rt == NULL) return NULL; 1022 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1023 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1024 "%s: meshgate !valid, flags 0x%x", __func__, 1025 rt->rt_flags); 1026 /* XXX stat */ 1027 return NULL; 1028 } 1029 } 1030 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1031 } 1032 1033 static void 1034 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1035 struct ieee80211_mesh_route *rt_gate) 1036 { 1037 struct ifnet *ifp = vap->iv_ifp; 1038 struct ieee80211_node *ni; 1039 1040 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1041 1042 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1043 if (ni == NULL) { 1044 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1045 m_freem(m); 1046 return; 1047 } 1048 1049 /* 1050 * Send through the VAP packet transmit path. 1051 * This consumes the node ref grabbed above and 1052 * the mbuf, regardless of whether there's a problem 1053 * or not. 1054 */ 1055 (void) ieee80211_vap_pkt_send_dest(vap, m, ni); 1056 } 1057 1058 /* 1059 * Forward the queued frames to known valid mesh gates. 1060 * Assume destination to be outside the MBSS (i.e. proxy entry), 1061 * If no valid mesh gates are known silently discard queued frames. 1062 * After transmitting frames to all known valid mesh gates, this route 1063 * will be marked invalid, and a new path discovery will happen in the hopes 1064 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1065 */ 1066 void 1067 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1068 struct ieee80211_mesh_route *rt_dest) 1069 { 1070 struct ieee80211com *ic = vap->iv_ic; 1071 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1072 struct ieee80211_mesh_route *rt_gate; 1073 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1074 struct mbuf *m, *mcopy, *next; 1075 1076 IEEE80211_TX_UNLOCK_ASSERT(ic); 1077 1078 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1079 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1080 1081 /* XXX: send to more than one valid mash gate */ 1082 MESH_RT_LOCK(ms); 1083 1084 m = ieee80211_ageq_remove(&ic->ic_stageq, 1085 (struct ieee80211_node *)(uintptr_t) 1086 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1087 1088 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1089 rt_gate = gr->gr_route; 1090 if (rt_gate == NULL) { 1091 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1092 rt_dest->rt_dest, 1093 "mesh gate with no path %6D", 1094 gr->gr_addr, ":"); 1095 continue; 1096 } 1097 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1098 continue; 1099 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1100 ("route not marked as a mesh gate")); 1101 KASSERT((rt_gate->rt_flags & 1102 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1103 ("found mesh gate that is also marked porxy")); 1104 /* 1105 * convert route to a proxy route gated by the current 1106 * mesh gate, this is needed so encap can built data 1107 * frame with correct address. 1108 */ 1109 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1110 IEEE80211_MESHRT_FLAGS_VALID; 1111 rt_dest->rt_ext_seq = 1; /* random value */ 1112 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1113 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1114 rt_dest->rt_metric = rt_gate->rt_metric; 1115 rt_dest->rt_nhops = rt_gate->rt_nhops; 1116 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1117 MESH_RT_UNLOCK(ms); 1118 /* XXX: lock?? */ 1119 mcopy = m_dup(m, M_NOWAIT); 1120 for (; mcopy != NULL; mcopy = next) { 1121 next = mcopy->m_nextpkt; 1122 mcopy->m_nextpkt = NULL; 1123 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1124 rt_dest->rt_dest, 1125 "flush queued frame %p len %d", mcopy, 1126 mcopy->m_pkthdr.len); 1127 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1128 } 1129 MESH_RT_LOCK(ms); 1130 } 1131 rt_dest->rt_flags = 0; /* Mark invalid */ 1132 m_freem(m); 1133 MESH_RT_UNLOCK(ms); 1134 } 1135 1136 /* 1137 * Forward the specified frame. 1138 * Decrement the TTL and set TA to our MAC address. 1139 */ 1140 static void 1141 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1142 const struct ieee80211_meshcntl *mc) 1143 { 1144 struct ieee80211com *ic = vap->iv_ic; 1145 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1146 struct ifnet *ifp = vap->iv_ifp; 1147 const struct ieee80211_frame *wh = 1148 mtod(m, const struct ieee80211_frame *); 1149 struct mbuf *mcopy; 1150 struct ieee80211_meshcntl *mccopy; 1151 struct ieee80211_frame *whcopy; 1152 struct ieee80211_node *ni; 1153 int err; 1154 1155 /* This is called from the RX path - don't hold this lock */ 1156 IEEE80211_TX_UNLOCK_ASSERT(ic); 1157 1158 /* 1159 * mesh ttl of 1 means we are the last one receiving it, 1160 * according to amendment we decrement and then check if 1161 * 0, if so we dont forward. 1162 */ 1163 if (mc->mc_ttl < 1) { 1164 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1165 "%s", "frame not fwd'd, ttl 1"); 1166 vap->iv_stats.is_mesh_fwd_ttl++; 1167 return; 1168 } 1169 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1170 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1171 "%s", "frame not fwd'd, fwding disabled"); 1172 vap->iv_stats.is_mesh_fwd_disabled++; 1173 return; 1174 } 1175 mcopy = m_dup(m, M_NOWAIT); 1176 if (mcopy == NULL) { 1177 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1178 "%s", "frame not fwd'd, cannot dup"); 1179 vap->iv_stats.is_mesh_fwd_nobuf++; 1180 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1181 return; 1182 } 1183 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1184 sizeof(struct ieee80211_meshcntl)); 1185 if (mcopy == NULL) { 1186 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1187 "%s", "frame not fwd'd, too short"); 1188 vap->iv_stats.is_mesh_fwd_tooshort++; 1189 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1190 m_freem(mcopy); 1191 return; 1192 } 1193 whcopy = mtod(mcopy, struct ieee80211_frame *); 1194 mccopy = (struct ieee80211_meshcntl *) 1195 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1196 /* XXX clear other bits? */ 1197 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1198 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1199 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1200 ni = ieee80211_ref_node(vap->iv_bss); 1201 mcopy->m_flags |= M_MCAST; 1202 } else { 1203 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1204 if (ni == NULL) { 1205 /* 1206 * [Optional] any of the following three actions: 1207 * o silently discard 1208 * o trigger a path discovery 1209 * o inform TA that meshDA is unknown. 1210 */ 1211 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1212 "%s", "frame not fwd'd, no path"); 1213 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1214 IEEE80211_REASON_MESH_PERR_NO_FI); 1215 vap->iv_stats.is_mesh_fwd_nopath++; 1216 m_freem(mcopy); 1217 return; 1218 } 1219 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1220 } 1221 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1222 mccopy->mc_ttl--; 1223 1224 /* XXX calculate priority so drivers can find the tx queue */ 1225 M_WME_SETAC(mcopy, WME_AC_BE); 1226 1227 /* XXX do we know m_nextpkt is NULL? */ 1228 mcopy->m_pkthdr.rcvif = (void *) ni; 1229 1230 /* 1231 * XXX this bypasses all of the VAP TX handling; it passes frames 1232 * directly to the parent interface. 1233 * 1234 * Because of this, there's no TX lock being held as there's no 1235 * encaps state being used. 1236 * 1237 * Doing a direct parent transmit may not be the correct thing 1238 * to do here; we'll have to re-think this soon. 1239 */ 1240 IEEE80211_TX_LOCK(ic); 1241 err = ieee80211_parent_xmitpkt(ic, mcopy); 1242 IEEE80211_TX_UNLOCK(ic); 1243 if (!err) 1244 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1245 } 1246 1247 static struct mbuf * 1248 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1249 { 1250 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1251 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1252 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1253 sizeof(struct ieee80211_meshcntl_ae10)]; 1254 const struct ieee80211_qosframe_addr4 *wh; 1255 const struct ieee80211_meshcntl_ae10 *mc; 1256 struct ether_header *eh; 1257 struct llc *llc; 1258 int ae; 1259 1260 if (m->m_len < hdrlen + sizeof(*llc) && 1261 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1262 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1263 "discard data frame: %s", "m_pullup failed"); 1264 vap->iv_stats.is_rx_tooshort++; 1265 return NULL; 1266 } 1267 memcpy(b, mtod(m, caddr_t), hdrlen); 1268 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1269 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1270 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1271 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1272 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1273 1274 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1275 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1276 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1277 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1278 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1279 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1280 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1281 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1282 llc = NULL; 1283 } else { 1284 m_adj(m, hdrlen - sizeof(*eh)); 1285 } 1286 eh = mtod(m, struct ether_header *); 1287 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1288 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1289 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1290 if (ae == IEEE80211_MESH_AE_00) { 1291 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1292 } else if (ae == IEEE80211_MESH_AE_01) { 1293 IEEE80211_ADDR_COPY(eh->ether_shost, 1294 MC01(mc)->mc_addr4); 1295 } else { 1296 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1297 (const struct ieee80211_frame *)wh, NULL, 1298 "bad AE %d", ae); 1299 vap->iv_stats.is_mesh_badae++; 1300 m_freem(m); 1301 return NULL; 1302 } 1303 } else { 1304 if (ae == IEEE80211_MESH_AE_00) { 1305 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1306 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1307 } else if (ae == IEEE80211_MESH_AE_10) { 1308 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1309 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1310 } else { 1311 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1312 (const struct ieee80211_frame *)wh, NULL, 1313 "bad AE %d", ae); 1314 vap->iv_stats.is_mesh_badae++; 1315 m_freem(m); 1316 return NULL; 1317 } 1318 } 1319 #ifndef __NO_STRICT_ALIGNMENT 1320 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1321 m = ieee80211_realign(vap, m, sizeof(*eh)); 1322 if (m == NULL) 1323 return NULL; 1324 } 1325 #endif /* !__NO_STRICT_ALIGNMENT */ 1326 if (llc != NULL) { 1327 eh = mtod(m, struct ether_header *); 1328 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1329 } 1330 return m; 1331 #undef WDIR 1332 #undef MC01 1333 } 1334 1335 /* 1336 * Return non-zero if the unicast mesh data frame should be processed 1337 * locally. Frames that are not proxy'd have our address, otherwise 1338 * we need to consult the routing table to look for a proxy entry. 1339 */ 1340 static __inline int 1341 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1342 const struct ieee80211_meshcntl *mc) 1343 { 1344 int ae = mc->mc_flags & 3; 1345 1346 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1347 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1348 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1349 ("bad AE %d", ae)); 1350 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1351 const struct ieee80211_meshcntl_ae10 *mc10 = 1352 (const struct ieee80211_meshcntl_ae10 *) mc; 1353 struct ieee80211_mesh_route *rt = 1354 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1355 /* check for proxy route to ourself */ 1356 return (rt != NULL && 1357 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1358 } else /* ucast w/o proxy */ 1359 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1360 } 1361 1362 /* 1363 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1364 * > 0 means we have forwarded data and no need to process locally 1365 * == 0 means we want to process locally (and we may have forwarded data 1366 * < 0 means there was an error and data should be discarded 1367 */ 1368 static int 1369 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1370 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1371 { 1372 struct ieee80211_qosframe_addr4 *qwh; 1373 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1374 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1375 1376 /* This is called from the RX path - don't hold this lock */ 1377 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1378 1379 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1380 1381 /* 1382 * TODO: 1383 * o verify addr2 is a legitimate transmitter 1384 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1385 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1386 */ 1387 1388 /* set lifetime of addr3 (meshDA) to initial value */ 1389 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1390 if (rt_meshda == NULL) { 1391 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1392 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1393 /* 1394 * [Optional] any of the following three actions: 1395 * o silently discard [X] 1396 * o trigger a path discovery [ ] 1397 * o inform TA that meshDA is unknown. [ ] 1398 */ 1399 /* XXX: stats */ 1400 return (-1); 1401 } 1402 1403 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1404 ms->ms_ppath->mpp_inact)); 1405 1406 /* set lifetime of addr4 (meshSA) to initial value */ 1407 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1408 KASSERT(rt_meshsa != NULL, ("no route")); 1409 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1410 ms->ms_ppath->mpp_inact)); 1411 1412 mesh_forward(vap, m, mc); 1413 return (1); /* dont process locally */ 1414 } 1415 1416 /* 1417 * Verifies transmitter, updates lifetime, precursor list and process data 1418 * locally, if data is proxy with AE = 10 it could mean data should go 1419 * on another mesh path or data should be forwarded to the DS. 1420 * 1421 * > 0 means we have forwarded data and no need to process locally 1422 * == 0 means we want to process locally (and we may have forwarded data 1423 * < 0 means there was an error and data should be discarded 1424 */ 1425 static int 1426 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1427 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1428 { 1429 struct ieee80211_qosframe_addr4 *qwh; 1430 const struct ieee80211_meshcntl_ae10 *mc10; 1431 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1432 struct ieee80211_mesh_route *rt; 1433 int ae; 1434 1435 /* This is called from the RX path - don't hold this lock */ 1436 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1437 1438 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1439 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1440 1441 /* 1442 * TODO: 1443 * o verify addr2 is a legitimate transmitter 1444 * o lifetime of precursor entry is max(init, curr) 1445 */ 1446 1447 /* set lifetime of addr4 (meshSA) to initial value */ 1448 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1449 KASSERT(rt != NULL, ("no route")); 1450 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1451 rt = NULL; 1452 1453 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1454 KASSERT(ae == IEEE80211_MESH_AE_00 || 1455 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1456 if (ae == IEEE80211_MESH_AE_10) { 1457 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1458 return (0); /* process locally */ 1459 } 1460 1461 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1462 if (rt != NULL && 1463 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1464 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1465 /* 1466 * Forward on another mesh-path, according to 1467 * amendment as specified in 9.32.4.1 1468 */ 1469 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1470 mesh_forward(vap, m, 1471 (const struct ieee80211_meshcntl *)mc10); 1472 return (1); /* dont process locally */ 1473 } 1474 /* 1475 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1476 * addressed according to 13.11.3.2. 1477 */ 1478 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1479 "forward frame to DS, SA(%6D) DA(%6D)", 1480 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1481 } 1482 return (0); /* process locally */ 1483 } 1484 1485 /* 1486 * Try to forward the group addressed data on to other mesh STAs, and 1487 * also to the DS. 1488 * 1489 * > 0 means we have forwarded data and no need to process locally 1490 * == 0 means we want to process locally (and we may have forwarded data 1491 * < 0 means there was an error and data should be discarded 1492 */ 1493 static int 1494 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1495 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1496 { 1497 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1498 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1499 1500 /* This is called from the RX path - don't hold this lock */ 1501 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1502 1503 mesh_forward(vap, m, mc); 1504 1505 if(mc->mc_ttl > 0) { 1506 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1507 /* 1508 * Forward of MSDUs from the MBSS to DS group addressed 1509 * (according to 13.11.3.2) 1510 * This happens by delivering the packet, and a bridge 1511 * will sent it on another port member. 1512 */ 1513 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1514 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) { 1515 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1516 MC01(mc)->mc_addr4, "%s", 1517 "forward from MBSS to the DS"); 1518 } 1519 } 1520 } 1521 return (0); /* process locally */ 1522 #undef MC01 1523 } 1524 1525 static int 1526 mesh_input(struct ieee80211_node *ni, struct mbuf *m, 1527 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1528 { 1529 #define HAS_SEQ(type) ((type & 0x4) == 0) 1530 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1531 struct ieee80211vap *vap = ni->ni_vap; 1532 struct ieee80211com *ic = ni->ni_ic; 1533 struct ifnet *ifp = vap->iv_ifp; 1534 struct ieee80211_frame *wh; 1535 const struct ieee80211_meshcntl *mc; 1536 int hdrspace, meshdrlen, need_tap, error; 1537 uint8_t dir, type, subtype, ae; 1538 uint32_t seq; 1539 const uint8_t *addr; 1540 uint8_t qos[2]; 1541 1542 KASSERT(ni != NULL, ("null node")); 1543 ni->ni_inact = ni->ni_inact_reload; 1544 1545 need_tap = 1; /* mbuf need to be tapped. */ 1546 type = -1; /* undefined */ 1547 1548 /* This is called from the RX path - don't hold this lock */ 1549 IEEE80211_TX_UNLOCK_ASSERT(ic); 1550 1551 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1552 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1553 ni->ni_macaddr, NULL, 1554 "too short (1): len %u", m->m_pkthdr.len); 1555 vap->iv_stats.is_rx_tooshort++; 1556 goto out; 1557 } 1558 /* 1559 * Bit of a cheat here, we use a pointer for a 3-address 1560 * frame format but don't reference fields past outside 1561 * ieee80211_frame_min w/o first validating the data is 1562 * present. 1563 */ 1564 wh = mtod(m, struct ieee80211_frame *); 1565 1566 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1567 IEEE80211_FC0_VERSION_0) { 1568 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1569 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1570 vap->iv_stats.is_rx_badversion++; 1571 goto err; 1572 } 1573 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1574 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1575 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1576 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1577 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1578 ni->ni_noise = nf; 1579 if (HAS_SEQ(type)) { 1580 uint8_t tid = ieee80211_gettid(wh); 1581 1582 if (IEEE80211_QOS_HAS_SEQ(wh) && 1583 TID_TO_WME_AC(tid) >= WME_AC_VI) 1584 ic->ic_wme.wme_hipri_traffic++; 1585 if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs)) 1586 goto out; 1587 } 1588 } 1589 #ifdef IEEE80211_DEBUG 1590 /* 1591 * It's easier, but too expensive, to simulate different mesh 1592 * topologies by consulting the ACL policy very early, so do this 1593 * only under DEBUG. 1594 * 1595 * NB: this check is also done upon peering link initiation. 1596 */ 1597 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1598 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1599 wh, NULL, "%s", "disallowed by ACL"); 1600 vap->iv_stats.is_rx_acl++; 1601 goto out; 1602 } 1603 #endif 1604 switch (type) { 1605 case IEEE80211_FC0_TYPE_DATA: 1606 if (ni == vap->iv_bss) 1607 goto out; 1608 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1609 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1610 ni->ni_macaddr, NULL, 1611 "peer link not yet established (%d)", 1612 ni->ni_mlstate); 1613 vap->iv_stats.is_mesh_nolink++; 1614 goto out; 1615 } 1616 if (dir != IEEE80211_FC1_DIR_FROMDS && 1617 dir != IEEE80211_FC1_DIR_DSTODS) { 1618 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1619 wh, "data", "incorrect dir 0x%x", dir); 1620 vap->iv_stats.is_rx_wrongdir++; 1621 goto err; 1622 } 1623 1624 /* All Mesh data frames are QoS subtype */ 1625 if (!HAS_SEQ(type)) { 1626 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1627 wh, "data", "incorrect subtype 0x%x", subtype); 1628 vap->iv_stats.is_rx_badsubtype++; 1629 goto err; 1630 } 1631 1632 /* 1633 * Next up, any fragmentation. 1634 * XXX: we defrag before we even try to forward, 1635 * Mesh Control field is not present in sub-sequent 1636 * fragmented frames. This is in contrast to Draft 4.0. 1637 */ 1638 hdrspace = ieee80211_hdrspace(ic, wh); 1639 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1640 m = ieee80211_defrag(ni, m, hdrspace); 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 if (IEEE80211_IS_DSTODS(wh)) 1659 *(uint16_t *)qos = *(uint16_t *) 1660 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1661 else 1662 *(uint16_t *)qos = *(uint16_t *) 1663 ((struct ieee80211_qosframe *)wh)->i_qos; 1664 1665 /* 1666 * NB: The mesh STA sets the Mesh Control Present 1667 * subfield to 1 in the Mesh Data frame containing 1668 * an unfragmented MSDU, an A-MSDU, or the first 1669 * fragment of an MSDU. 1670 * After defrag it should always be present. 1671 */ 1672 if (!(qos[1] & IEEE80211_QOS_MC)) { 1673 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1674 ni->ni_macaddr, NULL, 1675 "%s", "Mesh control field not present"); 1676 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1677 goto err; 1678 } 1679 1680 /* pull up enough to get to the mesh control */ 1681 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1682 (m = m_pullup(m, hdrspace + 1683 sizeof(struct ieee80211_meshcntl))) == NULL) { 1684 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1685 ni->ni_macaddr, NULL, 1686 "data too short: expecting %u", hdrspace); 1687 vap->iv_stats.is_rx_tooshort++; 1688 goto out; /* XXX */ 1689 } 1690 /* 1691 * Now calculate the full extent of the headers. Note 1692 * mesh_decap will pull up anything we didn't get 1693 * above when it strips the 802.11 headers. 1694 */ 1695 mc = (const struct ieee80211_meshcntl *) 1696 (mtod(m, const uint8_t *) + hdrspace); 1697 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1698 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1699 ae * IEEE80211_ADDR_LEN; 1700 hdrspace += meshdrlen; 1701 1702 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1703 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1704 (m->m_len < hdrspace) && 1705 ((m = m_pullup(m, hdrspace)) == NULL)) { 1706 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1707 ni->ni_macaddr, NULL, 1708 "data too short: expecting %u", hdrspace); 1709 vap->iv_stats.is_rx_tooshort++; 1710 goto out; /* XXX */ 1711 } 1712 /* XXX: are we sure there is no reallocating after m_pullup? */ 1713 1714 seq = le32dec(mc->mc_seq); 1715 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1716 addr = wh->i_addr3; 1717 else if (ae == IEEE80211_MESH_AE_01) 1718 addr = MC01(mc)->mc_addr4; 1719 else 1720 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1721 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1722 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1723 addr, "data", "%s", "not to me"); 1724 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1725 goto out; 1726 } 1727 if (mesh_checkpseq(vap, addr, seq) != 0) { 1728 vap->iv_stats.is_rx_dup++; 1729 goto out; 1730 } 1731 1732 /* This code "routes" the frame to the right control path */ 1733 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1734 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1735 error = 1736 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1737 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1738 error = mesh_recv_group_data(vap, m, wh, mc); 1739 else 1740 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1741 wh, mc); 1742 } else 1743 error = mesh_recv_group_data(vap, m, wh, mc); 1744 if (error < 0) 1745 goto err; 1746 else if (error > 0) 1747 goto out; 1748 1749 if (ieee80211_radiotap_active_vap(vap)) 1750 ieee80211_radiotap_rx(vap, m); 1751 need_tap = 0; 1752 1753 /* 1754 * Finally, strip the 802.11 header. 1755 */ 1756 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1757 if (m == NULL) { 1758 /* XXX mask bit to check for both */ 1759 /* don't count Null data frames as errors */ 1760 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1761 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1762 goto out; 1763 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1764 ni->ni_macaddr, "data", "%s", "decap error"); 1765 vap->iv_stats.is_rx_decap++; 1766 IEEE80211_NODE_STAT(ni, rx_decap); 1767 goto err; 1768 } 1769 if (qos[0] & IEEE80211_QOS_AMSDU) { 1770 m = ieee80211_decap_amsdu(ni, m); 1771 if (m == NULL) 1772 return IEEE80211_FC0_TYPE_DATA; 1773 } 1774 ieee80211_deliver_data(vap, ni, m); 1775 return type; 1776 case IEEE80211_FC0_TYPE_MGT: 1777 vap->iv_stats.is_rx_mgmt++; 1778 IEEE80211_NODE_STAT(ni, rx_mgmt); 1779 if (dir != IEEE80211_FC1_DIR_NODS) { 1780 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1781 wh, "mgt", "incorrect dir 0x%x", dir); 1782 vap->iv_stats.is_rx_wrongdir++; 1783 goto err; 1784 } 1785 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1786 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1787 ni->ni_macaddr, "mgt", "too short: len %u", 1788 m->m_pkthdr.len); 1789 vap->iv_stats.is_rx_tooshort++; 1790 goto out; 1791 } 1792 #ifdef IEEE80211_DEBUG 1793 if ((ieee80211_msg_debug(vap) && 1794 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1795 ieee80211_msg_dumppkts(vap)) { 1796 if_printf(ifp, "received %s from %s rssi %d\n", 1797 ieee80211_mgt_subtype_name(subtype), 1798 ether_sprintf(wh->i_addr2), rssi); 1799 } 1800 #endif 1801 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1802 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1803 wh, NULL, "%s", "WEP set but not permitted"); 1804 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1805 goto out; 1806 } 1807 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 1808 goto out; 1809 case IEEE80211_FC0_TYPE_CTL: 1810 vap->iv_stats.is_rx_ctl++; 1811 IEEE80211_NODE_STAT(ni, rx_ctrl); 1812 goto out; 1813 default: 1814 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1815 wh, "bad", "frame type 0x%x", type); 1816 /* should not come here */ 1817 break; 1818 } 1819 err: 1820 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1821 out: 1822 if (m != NULL) { 1823 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1824 ieee80211_radiotap_rx(vap, m); 1825 m_freem(m); 1826 } 1827 return type; 1828 #undef HAS_SEQ 1829 #undef MC01 1830 } 1831 1832 static void 1833 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1834 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1835 { 1836 struct ieee80211vap *vap = ni->ni_vap; 1837 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1838 struct ieee80211com *ic = ni->ni_ic; 1839 struct ieee80211_channel *rxchan = ic->ic_curchan; 1840 struct ieee80211_frame *wh; 1841 struct ieee80211_mesh_route *rt; 1842 uint8_t *frm, *efrm; 1843 1844 wh = mtod(m0, struct ieee80211_frame *); 1845 frm = (uint8_t *)&wh[1]; 1846 efrm = mtod(m0, uint8_t *) + m0->m_len; 1847 switch (subtype) { 1848 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1849 case IEEE80211_FC0_SUBTYPE_BEACON: 1850 { 1851 struct ieee80211_scanparams scan; 1852 struct ieee80211_channel *c; 1853 /* 1854 * We process beacon/probe response 1855 * frames to discover neighbors. 1856 */ 1857 if (rxs != NULL) { 1858 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1859 if (c != NULL) 1860 rxchan = c; 1861 } 1862 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) 1863 return; 1864 /* 1865 * Count frame now that we know it's to be processed. 1866 */ 1867 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1868 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1869 IEEE80211_NODE_STAT(ni, rx_beacons); 1870 } else 1871 IEEE80211_NODE_STAT(ni, rx_proberesp); 1872 /* 1873 * If scanning, just pass information to the scan module. 1874 */ 1875 if (ic->ic_flags & IEEE80211_F_SCAN) { 1876 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1877 /* 1878 * Actively scanning a channel marked passive; 1879 * send a probe request now that we know there 1880 * is 802.11 traffic present. 1881 * 1882 * XXX check if the beacon we recv'd gives 1883 * us what we need and suppress the probe req 1884 */ 1885 ieee80211_probe_curchan(vap, 1); 1886 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1887 } 1888 ieee80211_add_scan(vap, rxchan, &scan, wh, 1889 subtype, rssi, nf); 1890 return; 1891 } 1892 1893 /* The rest of this code assumes we are running */ 1894 if (vap->iv_state != IEEE80211_S_RUN) 1895 return; 1896 /* 1897 * Ignore non-mesh STAs. 1898 */ 1899 if ((scan.capinfo & 1900 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1901 scan.meshid == NULL || scan.meshconf == NULL) { 1902 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1903 wh, "beacon", "%s", "not a mesh sta"); 1904 vap->iv_stats.is_mesh_wrongmesh++; 1905 return; 1906 } 1907 /* 1908 * Ignore STAs for other mesh networks. 1909 */ 1910 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1911 mesh_verify_meshconf(vap, scan.meshconf)) { 1912 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1913 wh, "beacon", "%s", "not for our mesh"); 1914 vap->iv_stats.is_mesh_wrongmesh++; 1915 return; 1916 } 1917 /* 1918 * Peer only based on the current ACL policy. 1919 */ 1920 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1921 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1922 wh, NULL, "%s", "disallowed by ACL"); 1923 vap->iv_stats.is_rx_acl++; 1924 return; 1925 } 1926 /* 1927 * Do neighbor discovery. 1928 */ 1929 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1930 /* 1931 * Create a new entry in the neighbor table. 1932 */ 1933 ni = ieee80211_add_neighbor(vap, wh, &scan); 1934 } 1935 /* 1936 * Automatically peer with discovered nodes if possible. 1937 */ 1938 if (ni != vap->iv_bss && 1939 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1940 switch (ni->ni_mlstate) { 1941 case IEEE80211_NODE_MESH_IDLE: 1942 { 1943 uint16_t args[1]; 1944 1945 /* Wait for backoff callout to reset counter */ 1946 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1947 return; 1948 1949 ni->ni_mlpid = mesh_generateid(vap); 1950 if (ni->ni_mlpid == 0) 1951 return; 1952 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1953 args[0] = ni->ni_mlpid; 1954 ieee80211_send_action(ni, 1955 IEEE80211_ACTION_CAT_SELF_PROT, 1956 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1957 ni->ni_mlrcnt = 0; 1958 mesh_peer_timeout_setup(ni); 1959 break; 1960 } 1961 case IEEE80211_NODE_MESH_ESTABLISHED: 1962 { 1963 /* 1964 * Valid beacon from a peer mesh STA 1965 * bump TA lifetime 1966 */ 1967 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1968 if(rt != NULL) { 1969 ieee80211_mesh_rt_update(rt, 1970 ticks_to_msecs( 1971 ms->ms_ppath->mpp_inact)); 1972 } 1973 break; 1974 } 1975 default: 1976 break; /* ignore */ 1977 } 1978 } 1979 break; 1980 } 1981 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1982 { 1983 uint8_t *ssid, *meshid, *rates, *xrates; 1984 1985 if (vap->iv_state != IEEE80211_S_RUN) { 1986 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1987 wh, NULL, "wrong state %s", 1988 ieee80211_state_name[vap->iv_state]); 1989 vap->iv_stats.is_rx_mgtdiscard++; 1990 return; 1991 } 1992 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1993 /* frame must be directed */ 1994 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1995 wh, NULL, "%s", "not unicast"); 1996 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1997 return; 1998 } 1999 /* 2000 * prreq frame format 2001 * [tlv] ssid 2002 * [tlv] supported rates 2003 * [tlv] extended supported rates 2004 * [tlv] mesh id 2005 */ 2006 ssid = meshid = rates = xrates = NULL; 2007 while (efrm - frm > 1) { 2008 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2009 switch (*frm) { 2010 case IEEE80211_ELEMID_SSID: 2011 ssid = frm; 2012 break; 2013 case IEEE80211_ELEMID_RATES: 2014 rates = frm; 2015 break; 2016 case IEEE80211_ELEMID_XRATES: 2017 xrates = frm; 2018 break; 2019 case IEEE80211_ELEMID_MESHID: 2020 meshid = frm; 2021 break; 2022 } 2023 frm += frm[1] + 2; 2024 } 2025 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2026 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2027 if (xrates != NULL) 2028 IEEE80211_VERIFY_ELEMENT(xrates, 2029 IEEE80211_RATE_MAXSIZE - rates[1], return); 2030 if (meshid != NULL) { 2031 IEEE80211_VERIFY_ELEMENT(meshid, 2032 IEEE80211_MESHID_LEN, return); 2033 /* NB: meshid, not ssid */ 2034 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2035 } 2036 2037 /* XXX find a better class or define it's own */ 2038 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2039 "%s", "recv probe req"); 2040 /* 2041 * Some legacy 11b clients cannot hack a complete 2042 * probe response frame. When the request includes 2043 * only a bare-bones rate set, communicate this to 2044 * the transmit side. 2045 */ 2046 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2047 break; 2048 } 2049 2050 case IEEE80211_FC0_SUBTYPE_ACTION: 2051 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2052 if (ni == vap->iv_bss) { 2053 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2054 wh, NULL, "%s", "unknown node"); 2055 vap->iv_stats.is_rx_mgtdiscard++; 2056 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2057 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2058 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2059 wh, NULL, "%s", "not for us"); 2060 vap->iv_stats.is_rx_mgtdiscard++; 2061 } else if (vap->iv_state != IEEE80211_S_RUN) { 2062 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2063 wh, NULL, "wrong state %s", 2064 ieee80211_state_name[vap->iv_state]); 2065 vap->iv_stats.is_rx_mgtdiscard++; 2066 } else { 2067 if (ieee80211_parse_action(ni, m0) == 0) 2068 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2069 } 2070 break; 2071 2072 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2073 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2074 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2075 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2076 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 2077 case IEEE80211_FC0_SUBTYPE_ATIM: 2078 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2079 case IEEE80211_FC0_SUBTYPE_AUTH: 2080 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2081 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2082 wh, NULL, "%s", "not handled"); 2083 vap->iv_stats.is_rx_mgtdiscard++; 2084 break; 2085 2086 default: 2087 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2088 wh, "mgt", "subtype 0x%x not handled", subtype); 2089 vap->iv_stats.is_rx_badsubtype++; 2090 break; 2091 } 2092 } 2093 2094 static void 2095 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2096 { 2097 2098 switch (subtype) { 2099 case IEEE80211_FC0_SUBTYPE_BAR: 2100 ieee80211_recv_bar(ni, m); 2101 break; 2102 } 2103 } 2104 2105 /* 2106 * Parse meshpeering action ie's for MPM frames 2107 */ 2108 static const struct ieee80211_meshpeer_ie * 2109 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2110 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2111 const uint8_t *frm, const uint8_t *efrm, 2112 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2113 { 2114 struct ieee80211vap *vap = ni->ni_vap; 2115 const struct ieee80211_meshpeer_ie *mpie; 2116 uint16_t args[3]; 2117 const uint8_t *meshid, *meshconf; 2118 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2119 2120 meshid = meshconf = NULL; 2121 while (efrm - frm > 1) { 2122 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2123 switch (*frm) { 2124 case IEEE80211_ELEMID_MESHID: 2125 meshid = frm; 2126 break; 2127 case IEEE80211_ELEMID_MESHCONF: 2128 meshconf = frm; 2129 break; 2130 case IEEE80211_ELEMID_MESHPEER: 2131 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2132 memset(mp, 0, sizeof(*mp)); 2133 mp->peer_len = mpie->peer_len; 2134 mp->peer_proto = le16dec(&mpie->peer_proto); 2135 mp->peer_llinkid = le16dec(&mpie->peer_llinkid); 2136 switch (subtype) { 2137 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2138 mp->peer_linkid = 2139 le16dec(&mpie->peer_linkid); 2140 break; 2141 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2142 /* NB: peer link ID is optional */ 2143 if (mpie->peer_len == 2144 (IEEE80211_MPM_BASE_SZ + 2)) { 2145 mp->peer_linkid = 0; 2146 mp->peer_rcode = 2147 le16dec(&mpie->peer_linkid); 2148 } else { 2149 mp->peer_linkid = 2150 le16dec(&mpie->peer_linkid); 2151 mp->peer_rcode = 2152 le16dec(&mpie->peer_rcode); 2153 } 2154 break; 2155 } 2156 break; 2157 } 2158 frm += frm[1] + 2; 2159 } 2160 2161 /* 2162 * Verify the contents of the frame. 2163 * If it fails validation, close the peer link. 2164 */ 2165 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2166 sendclose = 1; 2167 IEEE80211_DISCARD(vap, 2168 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2169 wh, NULL, "%s", "MPM validation failed"); 2170 } 2171 2172 /* If meshid is not the same reject any frames type. */ 2173 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2174 sendclose = 1; 2175 IEEE80211_DISCARD(vap, 2176 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2177 wh, NULL, "%s", "not for our mesh"); 2178 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2179 /* 2180 * Standard not clear about this, if we dont ignore 2181 * there will be an endless loop between nodes sending 2182 * CLOSE frames between each other with wrong meshid. 2183 * Discard and timers will bring FSM to IDLE state. 2184 */ 2185 return NULL; 2186 } 2187 } 2188 2189 /* 2190 * Close frames are accepted if meshid is the same. 2191 * Verify the other two types. 2192 */ 2193 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2194 mesh_verify_meshconf(vap, meshconf)) { 2195 sendclose = 1; 2196 IEEE80211_DISCARD(vap, 2197 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2198 wh, NULL, "%s", "configuration missmatch"); 2199 } 2200 2201 if (sendclose) { 2202 vap->iv_stats.is_rx_mgtdiscard++; 2203 switch (ni->ni_mlstate) { 2204 case IEEE80211_NODE_MESH_IDLE: 2205 case IEEE80211_NODE_MESH_ESTABLISHED: 2206 case IEEE80211_NODE_MESH_HOLDING: 2207 /* ignore */ 2208 break; 2209 case IEEE80211_NODE_MESH_OPENSNT: 2210 case IEEE80211_NODE_MESH_OPENRCV: 2211 case IEEE80211_NODE_MESH_CONFIRMRCV: 2212 args[0] = ni->ni_mlpid; 2213 args[1] = ni->ni_mllid; 2214 /* Reason codes for rejection */ 2215 switch (subtype) { 2216 case IEEE80211_ACTION_MESHPEERING_OPEN: 2217 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2218 break; 2219 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2220 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2221 break; 2222 } 2223 ieee80211_send_action(ni, 2224 IEEE80211_ACTION_CAT_SELF_PROT, 2225 IEEE80211_ACTION_MESHPEERING_CLOSE, 2226 args); 2227 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2228 mesh_peer_timeout_setup(ni); 2229 break; 2230 } 2231 return NULL; 2232 } 2233 2234 return (const struct ieee80211_meshpeer_ie *) mp; 2235 } 2236 2237 static int 2238 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2239 const struct ieee80211_frame *wh, 2240 const uint8_t *frm, const uint8_t *efrm) 2241 { 2242 struct ieee80211vap *vap = ni->ni_vap; 2243 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2244 struct ieee80211_meshpeer_ie ie; 2245 const struct ieee80211_meshpeer_ie *meshpeer; 2246 uint16_t args[3]; 2247 2248 /* +2+2 for action + code + capabilites */ 2249 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2250 IEEE80211_ACTION_MESHPEERING_OPEN); 2251 if (meshpeer == NULL) { 2252 return 0; 2253 } 2254 2255 /* XXX move up */ 2256 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2257 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2258 2259 switch (ni->ni_mlstate) { 2260 case IEEE80211_NODE_MESH_IDLE: 2261 /* Reject open request if reached our maximum neighbor count */ 2262 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2263 args[0] = meshpeer->peer_llinkid; 2264 args[1] = 0; 2265 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2266 ieee80211_send_action(ni, 2267 IEEE80211_ACTION_CAT_SELF_PROT, 2268 IEEE80211_ACTION_MESHPEERING_CLOSE, 2269 args); 2270 /* stay in IDLE state */ 2271 return (0); 2272 } 2273 /* Open frame accepted */ 2274 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2275 ni->ni_mllid = meshpeer->peer_llinkid; 2276 ni->ni_mlpid = mesh_generateid(vap); 2277 if (ni->ni_mlpid == 0) 2278 return 0; /* XXX */ 2279 args[0] = ni->ni_mlpid; 2280 /* Announce we're open too... */ 2281 ieee80211_send_action(ni, 2282 IEEE80211_ACTION_CAT_SELF_PROT, 2283 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2284 /* ...and confirm the link. */ 2285 args[0] = ni->ni_mlpid; 2286 args[1] = ni->ni_mllid; 2287 ieee80211_send_action(ni, 2288 IEEE80211_ACTION_CAT_SELF_PROT, 2289 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2290 args); 2291 mesh_peer_timeout_setup(ni); 2292 break; 2293 case IEEE80211_NODE_MESH_OPENRCV: 2294 /* Wrong Link ID */ 2295 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2296 args[0] = ni->ni_mllid; 2297 args[1] = ni->ni_mlpid; 2298 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2299 ieee80211_send_action(ni, 2300 IEEE80211_ACTION_CAT_SELF_PROT, 2301 IEEE80211_ACTION_MESHPEERING_CLOSE, 2302 args); 2303 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2304 mesh_peer_timeout_setup(ni); 2305 break; 2306 } 2307 /* Duplicate open, confirm again. */ 2308 args[0] = ni->ni_mlpid; 2309 args[1] = ni->ni_mllid; 2310 ieee80211_send_action(ni, 2311 IEEE80211_ACTION_CAT_SELF_PROT, 2312 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2313 args); 2314 break; 2315 case IEEE80211_NODE_MESH_OPENSNT: 2316 ni->ni_mllid = meshpeer->peer_llinkid; 2317 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2318 args[0] = ni->ni_mlpid; 2319 args[1] = ni->ni_mllid; 2320 ieee80211_send_action(ni, 2321 IEEE80211_ACTION_CAT_SELF_PROT, 2322 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2323 args); 2324 /* NB: don't setup/clear any timeout */ 2325 break; 2326 case IEEE80211_NODE_MESH_CONFIRMRCV: 2327 if (ni->ni_mlpid != meshpeer->peer_linkid || 2328 ni->ni_mllid != meshpeer->peer_llinkid) { 2329 args[0] = ni->ni_mlpid; 2330 args[1] = ni->ni_mllid; 2331 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2332 ieee80211_send_action(ni, 2333 IEEE80211_ACTION_CAT_SELF_PROT, 2334 IEEE80211_ACTION_MESHPEERING_CLOSE, 2335 args); 2336 mesh_linkchange(ni, 2337 IEEE80211_NODE_MESH_HOLDING); 2338 mesh_peer_timeout_setup(ni); 2339 break; 2340 } 2341 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2342 ni->ni_mllid = meshpeer->peer_llinkid; 2343 args[0] = ni->ni_mlpid; 2344 args[1] = ni->ni_mllid; 2345 ieee80211_send_action(ni, 2346 IEEE80211_ACTION_CAT_SELF_PROT, 2347 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2348 args); 2349 mesh_peer_timeout_stop(ni); 2350 break; 2351 case IEEE80211_NODE_MESH_ESTABLISHED: 2352 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2353 args[0] = ni->ni_mllid; 2354 args[1] = ni->ni_mlpid; 2355 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2356 ieee80211_send_action(ni, 2357 IEEE80211_ACTION_CAT_SELF_PROT, 2358 IEEE80211_ACTION_MESHPEERING_CLOSE, 2359 args); 2360 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2361 mesh_peer_timeout_setup(ni); 2362 break; 2363 } 2364 args[0] = ni->ni_mlpid; 2365 args[1] = ni->ni_mllid; 2366 ieee80211_send_action(ni, 2367 IEEE80211_ACTION_CAT_SELF_PROT, 2368 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2369 args); 2370 break; 2371 case IEEE80211_NODE_MESH_HOLDING: 2372 args[0] = ni->ni_mlpid; 2373 args[1] = meshpeer->peer_llinkid; 2374 /* Standard not clear about what the reaason code should be */ 2375 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2376 ieee80211_send_action(ni, 2377 IEEE80211_ACTION_CAT_SELF_PROT, 2378 IEEE80211_ACTION_MESHPEERING_CLOSE, 2379 args); 2380 break; 2381 } 2382 return 0; 2383 } 2384 2385 static int 2386 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2387 const struct ieee80211_frame *wh, 2388 const uint8_t *frm, const uint8_t *efrm) 2389 { 2390 struct ieee80211vap *vap = ni->ni_vap; 2391 struct ieee80211_meshpeer_ie ie; 2392 const struct ieee80211_meshpeer_ie *meshpeer; 2393 uint16_t args[3]; 2394 2395 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2396 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2397 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2398 if (meshpeer == NULL) { 2399 return 0; 2400 } 2401 2402 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2403 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2404 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2405 2406 switch (ni->ni_mlstate) { 2407 case IEEE80211_NODE_MESH_OPENRCV: 2408 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2409 mesh_peer_timeout_stop(ni); 2410 break; 2411 case IEEE80211_NODE_MESH_OPENSNT: 2412 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2413 mesh_peer_timeout_setup(ni); 2414 break; 2415 case IEEE80211_NODE_MESH_HOLDING: 2416 args[0] = ni->ni_mlpid; 2417 args[1] = meshpeer->peer_llinkid; 2418 /* Standard not clear about what the reaason code should be */ 2419 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2420 ieee80211_send_action(ni, 2421 IEEE80211_ACTION_CAT_SELF_PROT, 2422 IEEE80211_ACTION_MESHPEERING_CLOSE, 2423 args); 2424 break; 2425 case IEEE80211_NODE_MESH_CONFIRMRCV: 2426 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2427 args[0] = ni->ni_mlpid; 2428 args[1] = ni->ni_mllid; 2429 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2430 ieee80211_send_action(ni, 2431 IEEE80211_ACTION_CAT_SELF_PROT, 2432 IEEE80211_ACTION_MESHPEERING_CLOSE, 2433 args); 2434 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2435 mesh_peer_timeout_setup(ni); 2436 } 2437 break; 2438 default: 2439 IEEE80211_DISCARD(vap, 2440 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2441 wh, NULL, "received confirm in invalid state %d", 2442 ni->ni_mlstate); 2443 vap->iv_stats.is_rx_mgtdiscard++; 2444 break; 2445 } 2446 return 0; 2447 } 2448 2449 static int 2450 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2451 const struct ieee80211_frame *wh, 2452 const uint8_t *frm, const uint8_t *efrm) 2453 { 2454 struct ieee80211_meshpeer_ie ie; 2455 const struct ieee80211_meshpeer_ie *meshpeer; 2456 uint16_t args[3]; 2457 2458 /* +2 for action + code */ 2459 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2460 IEEE80211_ACTION_MESHPEERING_CLOSE); 2461 if (meshpeer == NULL) { 2462 return 0; 2463 } 2464 2465 /* 2466 * XXX: check reason code, for example we could receive 2467 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2468 * to peer again. 2469 */ 2470 2471 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2472 ni, "%s", "recv PEER CLOSE"); 2473 2474 switch (ni->ni_mlstate) { 2475 case IEEE80211_NODE_MESH_IDLE: 2476 /* ignore */ 2477 break; 2478 case IEEE80211_NODE_MESH_OPENRCV: 2479 case IEEE80211_NODE_MESH_OPENSNT: 2480 case IEEE80211_NODE_MESH_CONFIRMRCV: 2481 case IEEE80211_NODE_MESH_ESTABLISHED: 2482 args[0] = ni->ni_mlpid; 2483 args[1] = ni->ni_mllid; 2484 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2485 ieee80211_send_action(ni, 2486 IEEE80211_ACTION_CAT_SELF_PROT, 2487 IEEE80211_ACTION_MESHPEERING_CLOSE, 2488 args); 2489 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2490 mesh_peer_timeout_setup(ni); 2491 break; 2492 case IEEE80211_NODE_MESH_HOLDING: 2493 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2494 mesh_peer_timeout_stop(ni); 2495 break; 2496 } 2497 return 0; 2498 } 2499 2500 /* 2501 * Link Metric handling. 2502 */ 2503 static int 2504 mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2505 const struct ieee80211_frame *wh, 2506 const uint8_t *frm, const uint8_t *efrm) 2507 { 2508 const struct ieee80211_meshlmetric_ie *ie = 2509 (const struct ieee80211_meshlmetric_ie *) 2510 (frm+2); /* action + code */ 2511 struct ieee80211_meshlmetric_ie lm_rep; 2512 2513 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2514 lm_rep.lm_flags = 0; 2515 lm_rep.lm_metric = mesh_airtime_calc(ni); 2516 ieee80211_send_action(ni, 2517 IEEE80211_ACTION_CAT_MESH, 2518 IEEE80211_ACTION_MESH_LMETRIC, 2519 &lm_rep); 2520 } 2521 /* XXX: else do nothing for now */ 2522 return 0; 2523 } 2524 2525 /* 2526 * Parse meshgate action ie's for GANN frames. 2527 * Returns -1 if parsing fails, otherwise 0. 2528 */ 2529 static int 2530 mesh_parse_meshgate_action(struct ieee80211_node *ni, 2531 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2532 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2533 { 2534 struct ieee80211vap *vap = ni->ni_vap; 2535 const struct ieee80211_meshgann_ie *gannie; 2536 2537 while (efrm - frm > 1) { 2538 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2539 switch (*frm) { 2540 case IEEE80211_ELEMID_MESHGANN: 2541 gannie = (const struct ieee80211_meshgann_ie *) frm; 2542 memset(ie, 0, sizeof(*ie)); 2543 ie->gann_ie = gannie->gann_ie; 2544 ie->gann_len = gannie->gann_len; 2545 ie->gann_flags = gannie->gann_flags; 2546 ie->gann_hopcount = gannie->gann_hopcount; 2547 ie->gann_ttl = gannie->gann_ttl; 2548 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2549 ie->gann_seq = le32dec(&gannie->gann_seq); 2550 ie->gann_interval = le16dec(&gannie->gann_interval); 2551 break; 2552 } 2553 frm += frm[1] + 2; 2554 } 2555 2556 return 0; 2557 } 2558 2559 /* 2560 * Mesh Gate Announcement handling. 2561 */ 2562 static int 2563 mesh_recv_action_meshgate(struct ieee80211_node *ni, 2564 const struct ieee80211_frame *wh, 2565 const uint8_t *frm, const uint8_t *efrm) 2566 { 2567 struct ieee80211vap *vap = ni->ni_vap; 2568 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2569 struct ieee80211_mesh_gate_route *gr, *next; 2570 struct ieee80211_mesh_route *rt_gate; 2571 struct ieee80211_meshgann_ie pgann; 2572 struct ieee80211_meshgann_ie ie; 2573 int found = 0; 2574 2575 /* +2 for action + code */ 2576 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2577 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2578 ni->ni_macaddr, NULL, "%s", 2579 "GANN parsing failed"); 2580 vap->iv_stats.is_rx_mgtdiscard++; 2581 return (0); 2582 } 2583 2584 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2585 return 0; 2586 2587 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2588 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2589 ie.gann_seq); 2590 2591 if (ms == NULL) 2592 return (0); 2593 MESH_RT_LOCK(ms); 2594 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2595 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2596 continue; 2597 if (ie.gann_seq <= gr->gr_lastseq) { 2598 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2599 ni->ni_macaddr, NULL, 2600 "GANN old seqno %u <= %u", 2601 ie.gann_seq, gr->gr_lastseq); 2602 MESH_RT_UNLOCK(ms); 2603 return (0); 2604 } 2605 /* corresponding mesh gate found & GANN accepted */ 2606 found = 1; 2607 break; 2608 2609 } 2610 if (found == 0) { 2611 /* this GANN is from a new mesh Gate add it to known table. */ 2612 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2613 "stored new GANN information, seq %u.", ie.gann_seq); 2614 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2615 M_80211_MESH_GT_RT, 2616 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2617 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2618 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2619 } 2620 gr->gr_lastseq = ie.gann_seq; 2621 2622 /* check if we have a path to this gate */ 2623 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2624 if (rt_gate != NULL && 2625 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2626 gr->gr_route = rt_gate; 2627 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2628 } 2629 2630 MESH_RT_UNLOCK(ms); 2631 2632 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2633 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2634 return 0; 2635 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2636 pgann.gann_hopcount = ie.gann_hopcount + 1; 2637 pgann.gann_ttl = ie.gann_ttl - 1; 2638 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2639 pgann.gann_seq = ie.gann_seq; 2640 pgann.gann_interval = ie.gann_interval; 2641 2642 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2643 "%s", "propagate GANN"); 2644 2645 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2646 IEEE80211_ACTION_MESH_GANN, &pgann); 2647 2648 return 0; 2649 } 2650 2651 static int 2652 mesh_send_action(struct ieee80211_node *ni, 2653 const uint8_t sa[IEEE80211_ADDR_LEN], 2654 const uint8_t da[IEEE80211_ADDR_LEN], 2655 struct mbuf *m) 2656 { 2657 struct ieee80211vap *vap = ni->ni_vap; 2658 struct ieee80211com *ic = ni->ni_ic; 2659 struct ieee80211_bpf_params params; 2660 int ret; 2661 2662 KASSERT(ni != NULL, ("null node")); 2663 2664 if (vap->iv_state == IEEE80211_S_CAC) { 2665 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2666 "block %s frame in CAC state", "Mesh action"); 2667 vap->iv_stats.is_tx_badstate++; 2668 ieee80211_free_node(ni); 2669 m_freem(m); 2670 return EIO; /* XXX */ 2671 } 2672 2673 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2674 if (m == NULL) { 2675 ieee80211_free_node(ni); 2676 return ENOMEM; 2677 } 2678 2679 IEEE80211_TX_LOCK(ic); 2680 ieee80211_send_setup(ni, m, 2681 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2682 IEEE80211_NONQOS_TID, sa, da, sa); 2683 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2684 2685 memset(¶ms, 0, sizeof(params)); 2686 params.ibp_pri = WME_AC_VO; 2687 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2688 if (IEEE80211_IS_MULTICAST(da)) 2689 params.ibp_try0 = 1; 2690 else 2691 params.ibp_try0 = ni->ni_txparms->maxretry; 2692 params.ibp_power = ni->ni_txpower; 2693 2694 IEEE80211_NODE_STAT(ni, tx_mgmt); 2695 2696 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2697 IEEE80211_TX_UNLOCK(ic); 2698 return (ret); 2699 } 2700 2701 #define ADDSHORT(frm, v) do { \ 2702 frm[0] = (v) & 0xff; \ 2703 frm[1] = (v) >> 8; \ 2704 frm += 2; \ 2705 } while (0) 2706 #define ADDWORD(frm, v) do { \ 2707 frm[0] = (v) & 0xff; \ 2708 frm[1] = ((v) >> 8) & 0xff; \ 2709 frm[2] = ((v) >> 16) & 0xff; \ 2710 frm[3] = ((v) >> 24) & 0xff; \ 2711 frm += 4; \ 2712 } while (0) 2713 2714 static int 2715 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2716 int category, int action, void *args0) 2717 { 2718 struct ieee80211vap *vap = ni->ni_vap; 2719 struct ieee80211com *ic = ni->ni_ic; 2720 uint16_t *args = args0; 2721 const struct ieee80211_rateset *rs; 2722 struct mbuf *m; 2723 uint8_t *frm; 2724 2725 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2726 "send PEER OPEN action: localid 0x%x", args[0]); 2727 2728 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2729 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2730 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2731 ieee80211_ref_node(ni); 2732 2733 m = ieee80211_getmgtframe(&frm, 2734 ic->ic_headroom + sizeof(struct ieee80211_frame), 2735 sizeof(uint16_t) /* action+category */ 2736 + sizeof(uint16_t) /* capabilites */ 2737 + 2 + IEEE80211_RATE_SIZE 2738 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2739 + 2 + IEEE80211_MESHID_LEN 2740 + sizeof(struct ieee80211_meshconf_ie) 2741 + sizeof(struct ieee80211_meshpeer_ie) 2742 ); 2743 if (m != NULL) { 2744 /* 2745 * mesh peer open action frame format: 2746 * [1] category 2747 * [1] action 2748 * [2] capabilities 2749 * [tlv] rates 2750 * [tlv] xrates 2751 * [tlv] mesh id 2752 * [tlv] mesh conf 2753 * [tlv] mesh peer link mgmt 2754 */ 2755 *frm++ = category; 2756 *frm++ = action; 2757 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2758 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2759 frm = ieee80211_add_rates(frm, rs); 2760 frm = ieee80211_add_xrates(frm, rs); 2761 frm = ieee80211_add_meshid(frm, vap); 2762 frm = ieee80211_add_meshconf(frm, vap); 2763 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2764 args[0], 0, 0); 2765 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2766 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2767 } else { 2768 vap->iv_stats.is_tx_nobuf++; 2769 ieee80211_free_node(ni); 2770 return ENOMEM; 2771 } 2772 } 2773 2774 static int 2775 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2776 int category, int action, void *args0) 2777 { 2778 struct ieee80211vap *vap = ni->ni_vap; 2779 struct ieee80211com *ic = ni->ni_ic; 2780 uint16_t *args = args0; 2781 const struct ieee80211_rateset *rs; 2782 struct mbuf *m; 2783 uint8_t *frm; 2784 2785 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2786 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2787 args[0], args[1]); 2788 2789 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2790 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2791 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2792 ieee80211_ref_node(ni); 2793 2794 m = ieee80211_getmgtframe(&frm, 2795 ic->ic_headroom + sizeof(struct ieee80211_frame), 2796 sizeof(uint16_t) /* action+category */ 2797 + sizeof(uint16_t) /* capabilites */ 2798 + sizeof(uint16_t) /* status code */ 2799 + sizeof(uint16_t) /* AID */ 2800 + 2 + IEEE80211_RATE_SIZE 2801 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2802 + 2 + IEEE80211_MESHID_LEN 2803 + sizeof(struct ieee80211_meshconf_ie) 2804 + sizeof(struct ieee80211_meshpeer_ie) 2805 ); 2806 if (m != NULL) { 2807 /* 2808 * mesh peer confirm action frame format: 2809 * [1] category 2810 * [1] action 2811 * [2] capabilities 2812 * [2] status code 2813 * [2] association id (peer ID) 2814 * [tlv] rates 2815 * [tlv] xrates 2816 * [tlv] mesh id 2817 * [tlv] mesh conf 2818 * [tlv] mesh peer link mgmt 2819 */ 2820 *frm++ = category; 2821 *frm++ = action; 2822 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2823 ADDSHORT(frm, 0); /* status code */ 2824 ADDSHORT(frm, args[1]); /* AID */ 2825 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2826 frm = ieee80211_add_rates(frm, rs); 2827 frm = ieee80211_add_xrates(frm, rs); 2828 frm = ieee80211_add_meshid(frm, vap); 2829 frm = ieee80211_add_meshconf(frm, vap); 2830 frm = ieee80211_add_meshpeer(frm, 2831 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2832 args[0], args[1], 0); 2833 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2834 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2835 } else { 2836 vap->iv_stats.is_tx_nobuf++; 2837 ieee80211_free_node(ni); 2838 return ENOMEM; 2839 } 2840 } 2841 2842 static int 2843 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2844 int category, int action, void *args0) 2845 { 2846 struct ieee80211vap *vap = ni->ni_vap; 2847 struct ieee80211com *ic = ni->ni_ic; 2848 uint16_t *args = args0; 2849 struct mbuf *m; 2850 uint8_t *frm; 2851 2852 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2853 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)", 2854 args[0], args[1], args[2], ieee80211_reason_to_string(args[2])); 2855 2856 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2857 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2858 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2859 ieee80211_ref_node(ni); 2860 2861 m = ieee80211_getmgtframe(&frm, 2862 ic->ic_headroom + sizeof(struct ieee80211_frame), 2863 sizeof(uint16_t) /* action+category */ 2864 + sizeof(uint16_t) /* reason code */ 2865 + 2 + IEEE80211_MESHID_LEN 2866 + sizeof(struct ieee80211_meshpeer_ie) 2867 ); 2868 if (m != NULL) { 2869 /* 2870 * mesh peer close action frame format: 2871 * [1] category 2872 * [1] action 2873 * [tlv] mesh id 2874 * [tlv] mesh peer link mgmt 2875 */ 2876 *frm++ = category; 2877 *frm++ = action; 2878 frm = ieee80211_add_meshid(frm, vap); 2879 frm = ieee80211_add_meshpeer(frm, 2880 IEEE80211_ACTION_MESHPEERING_CLOSE, 2881 args[0], args[1], args[2]); 2882 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2883 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2884 } else { 2885 vap->iv_stats.is_tx_nobuf++; 2886 ieee80211_free_node(ni); 2887 return ENOMEM; 2888 } 2889 } 2890 2891 static int 2892 mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2893 int category, int action, void *arg0) 2894 { 2895 struct ieee80211vap *vap = ni->ni_vap; 2896 struct ieee80211com *ic = ni->ni_ic; 2897 struct ieee80211_meshlmetric_ie *ie = arg0; 2898 struct mbuf *m; 2899 uint8_t *frm; 2900 2901 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2902 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2903 ni, "%s", "send LINK METRIC REQUEST action"); 2904 } else { 2905 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2906 ni, "send LINK METRIC REPLY action: metric 0x%x", 2907 ie->lm_metric); 2908 } 2909 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2910 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2911 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2912 ieee80211_ref_node(ni); 2913 2914 m = ieee80211_getmgtframe(&frm, 2915 ic->ic_headroom + sizeof(struct ieee80211_frame), 2916 sizeof(uint16_t) + /* action+category */ 2917 sizeof(struct ieee80211_meshlmetric_ie) 2918 ); 2919 if (m != NULL) { 2920 /* 2921 * mesh link metric 2922 * [1] category 2923 * [1] action 2924 * [tlv] mesh link metric 2925 */ 2926 *frm++ = category; 2927 *frm++ = action; 2928 frm = ieee80211_add_meshlmetric(frm, 2929 ie->lm_flags, ie->lm_metric); 2930 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2931 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2932 } else { 2933 vap->iv_stats.is_tx_nobuf++; 2934 ieee80211_free_node(ni); 2935 return ENOMEM; 2936 } 2937 } 2938 2939 static int 2940 mesh_send_action_meshgate(struct ieee80211_node *ni, 2941 int category, int action, void *arg0) 2942 { 2943 struct ieee80211vap *vap = ni->ni_vap; 2944 struct ieee80211com *ic = ni->ni_ic; 2945 struct ieee80211_meshgann_ie *ie = arg0; 2946 struct mbuf *m; 2947 uint8_t *frm; 2948 2949 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2950 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2951 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2952 ieee80211_ref_node(ni); 2953 2954 m = ieee80211_getmgtframe(&frm, 2955 ic->ic_headroom + sizeof(struct ieee80211_frame), 2956 sizeof(uint16_t) + /* action+category */ 2957 IEEE80211_MESHGANN_BASE_SZ 2958 ); 2959 if (m != NULL) { 2960 /* 2961 * mesh link metric 2962 * [1] category 2963 * [1] action 2964 * [tlv] mesh gate annoucement 2965 */ 2966 *frm++ = category; 2967 *frm++ = action; 2968 frm = ieee80211_add_meshgate(frm, ie); 2969 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2970 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 2971 } else { 2972 vap->iv_stats.is_tx_nobuf++; 2973 ieee80211_free_node(ni); 2974 return ENOMEM; 2975 } 2976 } 2977 2978 static void 2979 mesh_peer_timeout_setup(struct ieee80211_node *ni) 2980 { 2981 switch (ni->ni_mlstate) { 2982 case IEEE80211_NODE_MESH_HOLDING: 2983 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 2984 break; 2985 case IEEE80211_NODE_MESH_CONFIRMRCV: 2986 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 2987 break; 2988 case IEEE80211_NODE_MESH_IDLE: 2989 ni->ni_mltval = 0; 2990 break; 2991 default: 2992 ni->ni_mltval = ieee80211_mesh_retrytimeout; 2993 break; 2994 } 2995 if (ni->ni_mltval) 2996 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2997 mesh_peer_timeout_cb, ni); 2998 } 2999 3000 /* 3001 * Same as above but backoffs timer statisically 50%. 3002 */ 3003 static void 3004 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3005 { 3006 uint32_t r; 3007 3008 r = arc4random(); 3009 ni->ni_mltval += r % ni->ni_mltval; 3010 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3011 ni); 3012 } 3013 3014 static __inline void 3015 mesh_peer_timeout_stop(struct ieee80211_node *ni) 3016 { 3017 callout_drain(&ni->ni_mltimer); 3018 } 3019 3020 static void 3021 mesh_peer_backoff_cb(void *arg) 3022 { 3023 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3024 3025 /* After backoff timeout, try to peer automatically again. */ 3026 ni->ni_mlhcnt = 0; 3027 } 3028 3029 /* 3030 * Mesh Peer Link Management FSM timeout handling. 3031 */ 3032 static void 3033 mesh_peer_timeout_cb(void *arg) 3034 { 3035 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3036 uint16_t args[3]; 3037 3038 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3039 ni, "mesh link timeout, state %d, retry counter %d", 3040 ni->ni_mlstate, ni->ni_mlrcnt); 3041 3042 switch (ni->ni_mlstate) { 3043 case IEEE80211_NODE_MESH_IDLE: 3044 case IEEE80211_NODE_MESH_ESTABLISHED: 3045 break; 3046 case IEEE80211_NODE_MESH_OPENSNT: 3047 case IEEE80211_NODE_MESH_OPENRCV: 3048 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3049 args[0] = ni->ni_mlpid; 3050 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3051 ieee80211_send_action(ni, 3052 IEEE80211_ACTION_CAT_SELF_PROT, 3053 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3054 ni->ni_mlrcnt = 0; 3055 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3056 mesh_peer_timeout_setup(ni); 3057 } else { 3058 args[0] = ni->ni_mlpid; 3059 ieee80211_send_action(ni, 3060 IEEE80211_ACTION_CAT_SELF_PROT, 3061 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3062 ni->ni_mlrcnt++; 3063 mesh_peer_timeout_backoff(ni); 3064 } 3065 break; 3066 case IEEE80211_NODE_MESH_CONFIRMRCV: 3067 args[0] = ni->ni_mlpid; 3068 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3069 ieee80211_send_action(ni, 3070 IEEE80211_ACTION_CAT_SELF_PROT, 3071 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3072 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3073 mesh_peer_timeout_setup(ni); 3074 break; 3075 case IEEE80211_NODE_MESH_HOLDING: 3076 ni->ni_mlhcnt++; 3077 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3078 callout_reset(&ni->ni_mlhtimer, 3079 ieee80211_mesh_backofftimeout, 3080 mesh_peer_backoff_cb, ni); 3081 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3082 break; 3083 } 3084 } 3085 3086 static int 3087 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3088 { 3089 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3090 3091 if (ie == NULL || ie[1] != ms->ms_idlen) 3092 return 1; 3093 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3094 } 3095 3096 /* 3097 * Check if we are using the same algorithms for this mesh. 3098 */ 3099 static int 3100 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3101 { 3102 const struct ieee80211_meshconf_ie *meshconf = 3103 (const struct ieee80211_meshconf_ie *) ie; 3104 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3105 3106 if (meshconf == NULL) 3107 return 1; 3108 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3109 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3110 "unknown path selection algorithm: 0x%x\n", 3111 meshconf->conf_pselid); 3112 return 1; 3113 } 3114 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3115 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3116 "unknown path metric algorithm: 0x%x\n", 3117 meshconf->conf_pmetid); 3118 return 1; 3119 } 3120 if (meshconf->conf_ccid != 0) { 3121 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3122 "unknown congestion control algorithm: 0x%x\n", 3123 meshconf->conf_ccid); 3124 return 1; 3125 } 3126 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3127 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3128 "unknown sync algorithm: 0x%x\n", 3129 meshconf->conf_syncid); 3130 return 1; 3131 } 3132 if (meshconf->conf_authid != 0) { 3133 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3134 "unknown auth auth algorithm: 0x%x\n", 3135 meshconf->conf_pselid); 3136 return 1; 3137 } 3138 /* Not accepting peers */ 3139 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3140 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3141 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3142 return 1; 3143 } 3144 return 0; 3145 } 3146 3147 static int 3148 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3149 const uint8_t *ie) 3150 { 3151 const struct ieee80211_meshpeer_ie *meshpeer = 3152 (const struct ieee80211_meshpeer_ie *) ie; 3153 3154 if (meshpeer == NULL || 3155 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3156 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3157 return 1; 3158 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3159 IEEE80211_DPRINTF(vap, 3160 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3161 "Only MPM protocol is supported (proto: 0x%02X)", 3162 meshpeer->peer_proto); 3163 return 1; 3164 } 3165 switch (subtype) { 3166 case IEEE80211_ACTION_MESHPEERING_OPEN: 3167 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3168 return 1; 3169 break; 3170 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3171 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3172 return 1; 3173 break; 3174 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3175 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3176 return 1; 3177 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3178 meshpeer->peer_linkid != 0) 3179 return 1; 3180 if (meshpeer->peer_rcode == 0) 3181 return 1; 3182 break; 3183 } 3184 return 0; 3185 } 3186 3187 /* 3188 * Add a Mesh ID IE to a frame. 3189 */ 3190 uint8_t * 3191 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3192 { 3193 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3194 3195 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3196 3197 *frm++ = IEEE80211_ELEMID_MESHID; 3198 *frm++ = ms->ms_idlen; 3199 memcpy(frm, ms->ms_id, ms->ms_idlen); 3200 return frm + ms->ms_idlen; 3201 } 3202 3203 /* 3204 * Add a Mesh Configuration IE to a frame. 3205 * For now just use HWMP routing, Airtime link metric, Null Congestion 3206 * Signaling, Null Sync Protocol and Null Authentication. 3207 */ 3208 uint8_t * 3209 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3210 { 3211 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3212 uint16_t caps; 3213 3214 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3215 3216 *frm++ = IEEE80211_ELEMID_MESHCONF; 3217 *frm++ = IEEE80211_MESH_CONF_SZ; 3218 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3219 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3220 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3221 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3222 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3223 /* NB: set the number of neighbors before the rest */ 3224 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3225 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3226 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3227 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3228 frm += 1; 3229 caps = 0; 3230 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3231 caps |= IEEE80211_MESHCONF_CAP_AP; 3232 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3233 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3234 *frm++ = caps; 3235 return frm; 3236 } 3237 3238 /* 3239 * Add a Mesh Peer Management IE to a frame. 3240 */ 3241 uint8_t * 3242 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3243 uint16_t peerid, uint16_t reason) 3244 { 3245 3246 KASSERT(localid != 0, ("localid == 0")); 3247 3248 *frm++ = IEEE80211_ELEMID_MESHPEER; 3249 switch (subtype) { 3250 case IEEE80211_ACTION_MESHPEERING_OPEN: 3251 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3252 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3253 ADDSHORT(frm, localid); /* local ID */ 3254 break; 3255 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3256 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3257 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3258 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3259 ADDSHORT(frm, localid); /* local ID */ 3260 ADDSHORT(frm, peerid); /* peer ID */ 3261 break; 3262 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3263 if (peerid) 3264 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3265 else 3266 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3267 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3268 ADDSHORT(frm, localid); /* local ID */ 3269 if (peerid) 3270 ADDSHORT(frm, peerid); /* peer ID */ 3271 ADDSHORT(frm, reason); 3272 break; 3273 } 3274 return frm; 3275 } 3276 3277 /* 3278 * Compute an Airtime Link Metric for the link with this node. 3279 * 3280 * Based on Draft 3.0 spec (11B.10, p.149). 3281 */ 3282 /* 3283 * Max 802.11s overhead. 3284 */ 3285 #define IEEE80211_MESH_MAXOVERHEAD \ 3286 (sizeof(struct ieee80211_qosframe_addr4) \ 3287 + sizeof(struct ieee80211_meshcntl_ae10) \ 3288 + sizeof(struct llc) \ 3289 + IEEE80211_ADDR_LEN \ 3290 + IEEE80211_WEP_IVLEN \ 3291 + IEEE80211_WEP_KIDLEN \ 3292 + IEEE80211_WEP_CRCLEN \ 3293 + IEEE80211_WEP_MICLEN \ 3294 + IEEE80211_CRC_LEN) 3295 uint32_t 3296 mesh_airtime_calc(struct ieee80211_node *ni) 3297 { 3298 #define M_BITS 8 3299 #define S_FACTOR (2 * M_BITS) 3300 struct ieee80211com *ic = ni->ni_ic; 3301 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3302 const static int nbits = 8192 << M_BITS; 3303 uint32_t overhead, rate, errrate; 3304 uint64_t res; 3305 3306 /* Time to transmit a frame */ 3307 rate = ni->ni_txrate; 3308 overhead = ieee80211_compute_duration(ic->ic_rt, 3309 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3310 /* Error rate in percentage */ 3311 /* XXX assuming small failures are ok */ 3312 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + 3313 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) 3314 / 100; 3315 res = (overhead + (nbits / rate)) * 3316 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3317 3318 return (uint32_t)(res >> S_FACTOR); 3319 #undef M_BITS 3320 #undef S_FACTOR 3321 } 3322 3323 /* 3324 * Add a Mesh Link Metric report IE to a frame. 3325 */ 3326 uint8_t * 3327 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3328 { 3329 *frm++ = IEEE80211_ELEMID_MESHLINK; 3330 *frm++ = 5; 3331 *frm++ = flags; 3332 ADDWORD(frm, metric); 3333 return frm; 3334 } 3335 3336 /* 3337 * Add a Mesh Gate Announcement IE to a frame. 3338 */ 3339 uint8_t * 3340 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3341 { 3342 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3343 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3344 *frm++ = ie->gann_flags; 3345 *frm++ = ie->gann_hopcount; 3346 *frm++ = ie->gann_ttl; 3347 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3348 frm += 6; 3349 ADDWORD(frm, ie->gann_seq); 3350 ADDSHORT(frm, ie->gann_interval); 3351 return frm; 3352 } 3353 #undef ADDSHORT 3354 #undef ADDWORD 3355 3356 /* 3357 * Initialize any mesh-specific node state. 3358 */ 3359 void 3360 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3361 { 3362 ni->ni_flags |= IEEE80211_NODE_QOS; 3363 callout_init(&ni->ni_mltimer, 1); 3364 callout_init(&ni->ni_mlhtimer, 1); 3365 } 3366 3367 /* 3368 * Cleanup any mesh-specific node state. 3369 */ 3370 void 3371 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3372 { 3373 struct ieee80211vap *vap = ni->ni_vap; 3374 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3375 3376 callout_drain(&ni->ni_mltimer); 3377 callout_drain(&ni->ni_mlhtimer); 3378 /* NB: short-circuit callbacks after mesh_vdetach */ 3379 if (vap->iv_mesh != NULL) 3380 ms->ms_ppath->mpp_peerdown(ni); 3381 } 3382 3383 void 3384 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3385 { 3386 ni->ni_meshidlen = ie[1]; 3387 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3388 } 3389 3390 /* 3391 * Setup mesh-specific node state on neighbor discovery. 3392 */ 3393 void 3394 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3395 const struct ieee80211_frame *wh, 3396 const struct ieee80211_scanparams *sp) 3397 { 3398 ieee80211_parse_meshid(ni, sp->meshid); 3399 } 3400 3401 void 3402 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3403 struct ieee80211_beacon_offsets *bo) 3404 { 3405 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3406 3407 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3408 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3409 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3410 } 3411 } 3412 3413 static int 3414 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3415 { 3416 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3417 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3418 struct ieee80211_mesh_route *rt; 3419 struct ieee80211req_mesh_route *imr; 3420 size_t len, off; 3421 uint8_t *p; 3422 int error; 3423 3424 if (vap->iv_opmode != IEEE80211_M_MBSS) 3425 return ENOSYS; 3426 3427 error = 0; 3428 switch (ireq->i_type) { 3429 case IEEE80211_IOC_MESH_ID: 3430 ireq->i_len = ms->ms_idlen; 3431 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3432 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3433 break; 3434 case IEEE80211_IOC_MESH_AP: 3435 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3436 break; 3437 case IEEE80211_IOC_MESH_FWRD: 3438 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3439 break; 3440 case IEEE80211_IOC_MESH_GATE: 3441 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3442 break; 3443 case IEEE80211_IOC_MESH_TTL: 3444 ireq->i_val = ms->ms_ttl; 3445 break; 3446 case IEEE80211_IOC_MESH_RTCMD: 3447 switch (ireq->i_val) { 3448 case IEEE80211_MESH_RTCMD_LIST: 3449 len = 0; 3450 MESH_RT_LOCK(ms); 3451 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3452 len += sizeof(*imr); 3453 } 3454 MESH_RT_UNLOCK(ms); 3455 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3456 ireq->i_len = len; 3457 return ENOMEM; 3458 } 3459 ireq->i_len = len; 3460 /* XXX M_WAIT? */ 3461 p = IEEE80211_MALLOC(len, M_TEMP, 3462 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 3463 if (p == NULL) 3464 return ENOMEM; 3465 off = 0; 3466 MESH_RT_LOCK(ms); 3467 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3468 if (off >= len) 3469 break; 3470 imr = (struct ieee80211req_mesh_route *) 3471 (p + off); 3472 IEEE80211_ADDR_COPY(imr->imr_dest, 3473 rt->rt_dest); 3474 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3475 rt->rt_nexthop); 3476 imr->imr_metric = rt->rt_metric; 3477 imr->imr_nhops = rt->rt_nhops; 3478 imr->imr_lifetime = 3479 ieee80211_mesh_rt_update(rt, 0); 3480 imr->imr_lastmseq = rt->rt_lastmseq; 3481 imr->imr_flags = rt->rt_flags; /* last */ 3482 off += sizeof(*imr); 3483 } 3484 MESH_RT_UNLOCK(ms); 3485 error = copyout(p, (uint8_t *)ireq->i_data, 3486 ireq->i_len); 3487 IEEE80211_FREE(p, M_TEMP); 3488 break; 3489 case IEEE80211_MESH_RTCMD_FLUSH: 3490 case IEEE80211_MESH_RTCMD_ADD: 3491 case IEEE80211_MESH_RTCMD_DELETE: 3492 return EINVAL; 3493 default: 3494 return ENOSYS; 3495 } 3496 break; 3497 case IEEE80211_IOC_MESH_PR_METRIC: 3498 len = strlen(ms->ms_pmetric->mpm_descr); 3499 if (ireq->i_len < len) 3500 return EINVAL; 3501 ireq->i_len = len; 3502 error = copyout(ms->ms_pmetric->mpm_descr, 3503 (uint8_t *)ireq->i_data, len); 3504 break; 3505 case IEEE80211_IOC_MESH_PR_PATH: 3506 len = strlen(ms->ms_ppath->mpp_descr); 3507 if (ireq->i_len < len) 3508 return EINVAL; 3509 ireq->i_len = len; 3510 error = copyout(ms->ms_ppath->mpp_descr, 3511 (uint8_t *)ireq->i_data, len); 3512 break; 3513 default: 3514 return ENOSYS; 3515 } 3516 3517 return error; 3518 } 3519 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3520 3521 static int 3522 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3523 { 3524 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3525 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3526 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3527 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3528 int error; 3529 3530 if (vap->iv_opmode != IEEE80211_M_MBSS) 3531 return ENOSYS; 3532 3533 error = 0; 3534 switch (ireq->i_type) { 3535 case IEEE80211_IOC_MESH_ID: 3536 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3537 return EINVAL; 3538 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3539 if (error != 0) 3540 break; 3541 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3542 ms->ms_idlen = ireq->i_len; 3543 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3544 error = ENETRESET; 3545 break; 3546 case IEEE80211_IOC_MESH_AP: 3547 if (ireq->i_val) 3548 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3549 else 3550 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3551 error = ENETRESET; 3552 break; 3553 case IEEE80211_IOC_MESH_FWRD: 3554 if (ireq->i_val) 3555 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3556 else 3557 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3558 mesh_gatemode_setup(vap); 3559 break; 3560 case IEEE80211_IOC_MESH_GATE: 3561 if (ireq->i_val) 3562 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3563 else 3564 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3565 break; 3566 case IEEE80211_IOC_MESH_TTL: 3567 ms->ms_ttl = (uint8_t) ireq->i_val; 3568 break; 3569 case IEEE80211_IOC_MESH_RTCMD: 3570 switch (ireq->i_val) { 3571 case IEEE80211_MESH_RTCMD_LIST: 3572 return EINVAL; 3573 case IEEE80211_MESH_RTCMD_FLUSH: 3574 ieee80211_mesh_rt_flush(vap); 3575 break; 3576 case IEEE80211_MESH_RTCMD_ADD: 3577 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3578 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3579 return EINVAL; 3580 error = copyin(ireq->i_data, &tmpaddr, 3581 IEEE80211_ADDR_LEN); 3582 if (error == 0) 3583 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3584 break; 3585 case IEEE80211_MESH_RTCMD_DELETE: 3586 ieee80211_mesh_rt_del(vap, ireq->i_data); 3587 break; 3588 default: 3589 return ENOSYS; 3590 } 3591 break; 3592 case IEEE80211_IOC_MESH_PR_METRIC: 3593 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3594 if (error == 0) { 3595 error = mesh_select_proto_metric(vap, tmpproto); 3596 if (error == 0) 3597 error = ENETRESET; 3598 } 3599 break; 3600 case IEEE80211_IOC_MESH_PR_PATH: 3601 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3602 if (error == 0) { 3603 error = mesh_select_proto_path(vap, tmpproto); 3604 if (error == 0) 3605 error = ENETRESET; 3606 } 3607 break; 3608 default: 3609 return ENOSYS; 3610 } 3611 return error; 3612 } 3613 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);
Cache object: ee8c6bd4bff6aa662a427997795edfec
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