1 /*- 2 * Copyright (c) 2009 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Rui Paulo under sponsorship from the 6 * FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 #include <sys/cdefs.h> 30 #ifdef __FreeBSD__ 31 __FBSDID("$FreeBSD$"); 32 #endif 33 34 /* 35 * IEEE 802.11s Mesh Point (MBSS) support. 36 * 37 * Based on March 2009, D3.0 802.11s draft spec. 38 */ 39 #include "opt_inet.h" 40 #include "opt_wlan.h" 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/mbuf.h> 45 #include <sys/malloc.h> 46 #include <sys/kernel.h> 47 48 #include <sys/socket.h> 49 #include <sys/sockio.h> 50 #include <sys/endian.h> 51 #include <sys/errno.h> 52 #include <sys/proc.h> 53 #include <sys/sysctl.h> 54 55 #include <net/bpf.h> 56 #include <net/if.h> 57 #include <net/if_var.h> 58 #include <net/if_media.h> 59 #include <net/if_llc.h> 60 #include <net/ethernet.h> 61 62 #include <net80211/ieee80211_var.h> 63 #include <net80211/ieee80211_action.h> 64 #ifdef IEEE80211_SUPPORT_SUPERG 65 #include <net80211/ieee80211_superg.h> 66 #endif 67 #include <net80211/ieee80211_input.h> 68 #include <net80211/ieee80211_mesh.h> 69 70 static void mesh_rt_flush_invalid(struct ieee80211vap *); 71 static int mesh_select_proto_path(struct ieee80211vap *, const char *); 72 static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 73 static void mesh_vattach(struct ieee80211vap *); 74 static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 75 static void mesh_rt_cleanup_cb(void *); 76 static void mesh_gatemode_setup(struct ieee80211vap *); 77 static void mesh_gatemode_cb(void *); 78 static void mesh_linkchange(struct ieee80211_node *, 79 enum ieee80211_mesh_mlstate); 80 static void mesh_checkid(void *, struct ieee80211_node *); 81 static uint32_t mesh_generateid(struct ieee80211vap *); 82 static int mesh_checkpseq(struct ieee80211vap *, 83 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 84 static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, 85 struct ieee80211_mesh_route *); 86 static void mesh_forward(struct ieee80211vap *, struct mbuf *, 87 const struct ieee80211_meshcntl *); 88 static int mesh_input(struct ieee80211_node *, struct mbuf *, 89 const struct ieee80211_rx_stats *rxs, int, int); 90 static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 91 const struct ieee80211_rx_stats *rxs, int, int); 92 static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 93 static void mesh_peer_timeout_setup(struct ieee80211_node *); 94 static void mesh_peer_timeout_backoff(struct ieee80211_node *); 95 static void mesh_peer_timeout_cb(void *); 96 static __inline void 97 mesh_peer_timeout_stop(struct ieee80211_node *); 98 static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 99 static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 100 static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 101 const uint8_t *); 102 uint32_t mesh_airtime_calc(struct ieee80211_node *); 103 104 /* 105 * Timeout values come from the specification and are in milliseconds. 106 */ 107 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 108 "IEEE 802.11s parameters"); 109 static int ieee80211_mesh_gateint = -1; 110 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW, 111 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 112 "mesh gate interval (ms)"); 113 static int ieee80211_mesh_retrytimeout = -1; 114 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, 115 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 116 "Retry timeout (msec)"); 117 static int ieee80211_mesh_holdingtimeout = -1; 118 119 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, 120 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 121 "Holding state timeout (msec)"); 122 static int ieee80211_mesh_confirmtimeout = -1; 123 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, 124 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 125 "Confirm state timeout (msec)"); 126 static int ieee80211_mesh_backofftimeout = -1; 127 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW, 128 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 129 "Backoff timeout (msec). This is to throutles peering forever when " 130 "not receiving answer or is rejected by a neighbor"); 131 static int ieee80211_mesh_maxretries = 2; 132 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW, 133 &ieee80211_mesh_maxretries, 0, 134 "Maximum retries during peer link establishment"); 135 static int ieee80211_mesh_maxholding = 2; 136 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW, 137 &ieee80211_mesh_maxholding, 0, 138 "Maximum times we are allowed to transition to HOLDING state before " 139 "backinoff during peer link establishment"); 140 141 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 142 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 143 144 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 145 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 146 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 147 static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 148 static ieee80211_recv_action_func mesh_recv_action_meshgate; 149 150 static ieee80211_send_action_func mesh_send_action_meshpeering_open; 151 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 152 static ieee80211_send_action_func mesh_send_action_meshpeering_close; 153 static ieee80211_send_action_func mesh_send_action_meshlmetric; 154 static ieee80211_send_action_func mesh_send_action_meshgate; 155 156 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 157 .mpm_descr = "AIRTIME", 158 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 159 .mpm_metric = mesh_airtime_calc, 160 }; 161 162 static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 163 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 164 165 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 166 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 167 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 168 169 /* The longer one of the lifetime should be stored as new lifetime */ 170 #define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 171 172 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 173 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 174 175 /* 176 * Helper functions to manipulate the Mesh routing table. 177 */ 178 179 static struct ieee80211_mesh_route * 180 mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 181 const uint8_t dest[IEEE80211_ADDR_LEN]) 182 { 183 struct ieee80211_mesh_route *rt; 184 185 MESH_RT_LOCK_ASSERT(ms); 186 187 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 188 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 189 return rt; 190 } 191 return NULL; 192 } 193 194 static struct ieee80211_mesh_route * 195 mesh_rt_add_locked(struct ieee80211vap *vap, 196 const uint8_t dest[IEEE80211_ADDR_LEN]) 197 { 198 struct ieee80211_mesh_state *ms = vap->iv_mesh; 199 struct ieee80211_mesh_route *rt; 200 201 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 202 ("%s: adding broadcast to the routing table", __func__)); 203 204 MESH_RT_LOCK_ASSERT(ms); 205 206 rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) + 207 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, 208 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 209 if (rt != NULL) { 210 rt->rt_vap = vap; 211 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 212 rt->rt_priv = (void *)ALIGN(&rt[1]); 213 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT"); 214 callout_init(&rt->rt_discovery, 1); 215 rt->rt_updtime = ticks; /* create time */ 216 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 217 } 218 return rt; 219 } 220 221 struct ieee80211_mesh_route * 222 ieee80211_mesh_rt_find(struct ieee80211vap *vap, 223 const uint8_t dest[IEEE80211_ADDR_LEN]) 224 { 225 struct ieee80211_mesh_state *ms = vap->iv_mesh; 226 struct ieee80211_mesh_route *rt; 227 228 MESH_RT_LOCK(ms); 229 rt = mesh_rt_find_locked(ms, dest); 230 MESH_RT_UNLOCK(ms); 231 return rt; 232 } 233 234 struct ieee80211_mesh_route * 235 ieee80211_mesh_rt_add(struct ieee80211vap *vap, 236 const uint8_t dest[IEEE80211_ADDR_LEN]) 237 { 238 struct ieee80211_mesh_state *ms = vap->iv_mesh; 239 struct ieee80211_mesh_route *rt; 240 241 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 242 ("%s: duplicate entry in the routing table", __func__)); 243 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 244 ("%s: adding self to the routing table", __func__)); 245 246 MESH_RT_LOCK(ms); 247 rt = mesh_rt_add_locked(vap, dest); 248 MESH_RT_UNLOCK(ms); 249 return rt; 250 } 251 252 /* 253 * Update the route lifetime and returns the updated lifetime. 254 * If new_lifetime is zero and route is timedout it will be invalidated. 255 * new_lifetime is in msec 256 */ 257 int 258 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 259 { 260 int timesince, now; 261 uint32_t lifetime = 0; 262 263 KASSERT(rt != NULL, ("route is NULL")); 264 265 now = ticks; 266 MESH_RT_ENTRY_LOCK(rt); 267 268 /* dont clobber a proxy entry gated by us */ 269 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 270 MESH_RT_ENTRY_UNLOCK(rt); 271 return rt->rt_lifetime; 272 } 273 274 timesince = ticks_to_msecs(now - rt->rt_updtime); 275 rt->rt_updtime = now; 276 if (timesince >= rt->rt_lifetime) { 277 if (new_lifetime != 0) { 278 rt->rt_lifetime = new_lifetime; 279 } 280 else { 281 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 282 rt->rt_lifetime = 0; 283 } 284 } else { 285 /* update what is left of lifetime */ 286 rt->rt_lifetime = rt->rt_lifetime - timesince; 287 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 288 new_lifetime, rt->rt_lifetime); 289 } 290 lifetime = rt->rt_lifetime; 291 MESH_RT_ENTRY_UNLOCK(rt); 292 293 return lifetime; 294 } 295 296 /* 297 * Add a proxy route (as needed) for the specified destination. 298 */ 299 void 300 ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 301 const uint8_t dest[IEEE80211_ADDR_LEN]) 302 { 303 struct ieee80211_mesh_state *ms = vap->iv_mesh; 304 struct ieee80211_mesh_route *rt; 305 306 MESH_RT_LOCK(ms); 307 rt = mesh_rt_find_locked(ms, dest); 308 if (rt == NULL) { 309 rt = mesh_rt_add_locked(vap, dest); 310 if (rt == NULL) { 311 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 312 "%s", "unable to add proxy entry"); 313 vap->iv_stats.is_mesh_rtaddfailed++; 314 } else { 315 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 316 "%s", "add proxy entry"); 317 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 318 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 319 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 320 | IEEE80211_MESHRT_FLAGS_PROXY; 321 } 322 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 323 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 324 ("no proxy flag for poxy entry")); 325 struct ieee80211com *ic = vap->iv_ic; 326 /* 327 * Fix existing entry created by received frames from 328 * stations that have some memory of dest. We also 329 * flush any frames held on the staging queue; delivering 330 * them is too much trouble right now. 331 */ 332 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 333 "%s", "fix proxy entry"); 334 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 335 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 336 | IEEE80211_MESHRT_FLAGS_PROXY; 337 /* XXX belongs in hwmp */ 338 ieee80211_ageq_drain_node(&ic->ic_stageq, 339 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 340 /* XXX stat? */ 341 } 342 MESH_RT_UNLOCK(ms); 343 } 344 345 static __inline void 346 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 347 { 348 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 349 /* 350 * Grab the lock before destroying it, to be sure no one else 351 * is holding the route. 352 */ 353 MESH_RT_ENTRY_LOCK(rt); 354 callout_drain(&rt->rt_discovery); 355 MESH_RT_ENTRY_LOCK_DESTROY(rt); 356 IEEE80211_FREE(rt, M_80211_MESH_RT); 357 } 358 359 void 360 ieee80211_mesh_rt_del(struct ieee80211vap *vap, 361 const uint8_t dest[IEEE80211_ADDR_LEN]) 362 { 363 struct ieee80211_mesh_state *ms = vap->iv_mesh; 364 struct ieee80211_mesh_route *rt, *next; 365 366 MESH_RT_LOCK(ms); 367 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 368 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 369 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 370 ms->ms_ppath->mpp_senderror(vap, dest, rt, 371 IEEE80211_REASON_MESH_PERR_NO_PROXY); 372 } else { 373 ms->ms_ppath->mpp_senderror(vap, dest, rt, 374 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 375 } 376 mesh_rt_del(ms, rt); 377 MESH_RT_UNLOCK(ms); 378 return; 379 } 380 } 381 MESH_RT_UNLOCK(ms); 382 } 383 384 void 385 ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 386 { 387 struct ieee80211_mesh_state *ms = vap->iv_mesh; 388 struct ieee80211_mesh_route *rt, *next; 389 390 if (ms == NULL) 391 return; 392 MESH_RT_LOCK(ms); 393 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 394 mesh_rt_del(ms, rt); 395 MESH_RT_UNLOCK(ms); 396 } 397 398 void 399 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 400 const uint8_t peer[IEEE80211_ADDR_LEN]) 401 { 402 struct ieee80211_mesh_state *ms = vap->iv_mesh; 403 struct ieee80211_mesh_route *rt, *next; 404 405 MESH_RT_LOCK(ms); 406 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 407 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 408 mesh_rt_del(ms, rt); 409 } 410 MESH_RT_UNLOCK(ms); 411 } 412 413 /* 414 * Flush expired routing entries, i.e. those in invalid state for 415 * some time. 416 */ 417 static void 418 mesh_rt_flush_invalid(struct ieee80211vap *vap) 419 { 420 struct ieee80211_mesh_state *ms = vap->iv_mesh; 421 struct ieee80211_mesh_route *rt, *next; 422 423 if (ms == NULL) 424 return; 425 MESH_RT_LOCK(ms); 426 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 427 /* Discover paths will be deleted by their own callout */ 428 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 429 continue; 430 ieee80211_mesh_rt_update(rt, 0); 431 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 432 mesh_rt_del(ms, rt); 433 } 434 MESH_RT_UNLOCK(ms); 435 } 436 437 int 438 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 439 { 440 int i, firstempty = -1; 441 442 for (i = 0; i < nitems(mesh_proto_paths); i++) { 443 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 444 IEEE80211_MESH_PROTO_DSZ) == 0) 445 return EEXIST; 446 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 447 firstempty = i; 448 } 449 if (firstempty < 0) 450 return ENOSPC; 451 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 452 mesh_proto_paths[firstempty].mpp_active = 1; 453 return 0; 454 } 455 456 int 457 ieee80211_mesh_register_proto_metric(const struct 458 ieee80211_mesh_proto_metric *mpm) 459 { 460 int i, firstempty = -1; 461 462 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 463 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 464 IEEE80211_MESH_PROTO_DSZ) == 0) 465 return EEXIST; 466 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 467 firstempty = i; 468 } 469 if (firstempty < 0) 470 return ENOSPC; 471 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 472 mesh_proto_metrics[firstempty].mpm_active = 1; 473 return 0; 474 } 475 476 static int 477 mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 478 { 479 struct ieee80211_mesh_state *ms = vap->iv_mesh; 480 int i; 481 482 for (i = 0; i < nitems(mesh_proto_paths); i++) { 483 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 484 ms->ms_ppath = &mesh_proto_paths[i]; 485 return 0; 486 } 487 } 488 return ENOENT; 489 } 490 491 static int 492 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 493 { 494 struct ieee80211_mesh_state *ms = vap->iv_mesh; 495 int i; 496 497 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 498 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 499 ms->ms_pmetric = &mesh_proto_metrics[i]; 500 return 0; 501 } 502 } 503 return ENOENT; 504 } 505 506 static void 507 mesh_gatemode_setup(struct ieee80211vap *vap) 508 { 509 struct ieee80211_mesh_state *ms = vap->iv_mesh; 510 511 /* 512 * NB: When a mesh gate is running as a ROOT it shall 513 * not send out periodic GANNs but instead mark the 514 * mesh gate flag for the corresponding proactive PREQ 515 * and RANN frames. 516 */ 517 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 518 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 519 callout_drain(&ms->ms_gatetimer); 520 return ; 521 } 522 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 523 mesh_gatemode_cb, vap); 524 } 525 526 static void 527 mesh_gatemode_cb(void *arg) 528 { 529 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 530 struct ieee80211_mesh_state *ms = vap->iv_mesh; 531 struct ieee80211_meshgann_ie gann; 532 533 gann.gann_flags = 0; /* Reserved */ 534 gann.gann_hopcount = 0; 535 gann.gann_ttl = ms->ms_ttl; 536 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 537 gann.gann_seq = ms->ms_gateseq++; 538 gann.gann_interval = ieee80211_mesh_gateint; 539 540 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 541 "send broadcast GANN (seq %u)", gann.gann_seq); 542 543 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 544 IEEE80211_ACTION_MESH_GANN, &gann); 545 mesh_gatemode_setup(vap); 546 } 547 548 static void 549 ieee80211_mesh_init(void) 550 { 551 552 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 553 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 554 555 /* 556 * Setup mesh parameters that depends on the clock frequency. 557 */ 558 ieee80211_mesh_gateint = msecs_to_ticks(10000); 559 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 560 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 561 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 562 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 563 564 /* 565 * Register action frame handlers. 566 */ 567 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 568 IEEE80211_ACTION_MESHPEERING_OPEN, 569 mesh_recv_action_meshpeering_open); 570 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 571 IEEE80211_ACTION_MESHPEERING_CONFIRM, 572 mesh_recv_action_meshpeering_confirm); 573 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 574 IEEE80211_ACTION_MESHPEERING_CLOSE, 575 mesh_recv_action_meshpeering_close); 576 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 577 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 578 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 579 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 580 581 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 582 IEEE80211_ACTION_MESHPEERING_OPEN, 583 mesh_send_action_meshpeering_open); 584 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 585 IEEE80211_ACTION_MESHPEERING_CONFIRM, 586 mesh_send_action_meshpeering_confirm); 587 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 588 IEEE80211_ACTION_MESHPEERING_CLOSE, 589 mesh_send_action_meshpeering_close); 590 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 591 IEEE80211_ACTION_MESH_LMETRIC, 592 mesh_send_action_meshlmetric); 593 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 594 IEEE80211_ACTION_MESH_GANN, 595 mesh_send_action_meshgate); 596 597 /* 598 * Register Airtime Link Metric. 599 */ 600 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 601 602 } 603 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 604 605 void 606 ieee80211_mesh_attach(struct ieee80211com *ic) 607 { 608 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 609 } 610 611 void 612 ieee80211_mesh_detach(struct ieee80211com *ic) 613 { 614 } 615 616 static void 617 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 618 { 619 struct ieee80211com *ic = ni->ni_ic; 620 uint16_t args[3]; 621 622 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 623 args[0] = ni->ni_mlpid; 624 args[1] = ni->ni_mllid; 625 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 626 ieee80211_send_action(ni, 627 IEEE80211_ACTION_CAT_SELF_PROT, 628 IEEE80211_ACTION_MESHPEERING_CLOSE, 629 args); 630 } 631 callout_drain(&ni->ni_mltimer); 632 /* XXX belongs in hwmp */ 633 ieee80211_ageq_drain_node(&ic->ic_stageq, 634 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 635 } 636 637 static void 638 mesh_vdetach(struct ieee80211vap *vap) 639 { 640 struct ieee80211_mesh_state *ms = vap->iv_mesh; 641 642 callout_drain(&ms->ms_cleantimer); 643 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 644 NULL); 645 ieee80211_mesh_rt_flush(vap); 646 MESH_RT_LOCK_DESTROY(ms); 647 ms->ms_ppath->mpp_vdetach(vap); 648 IEEE80211_FREE(vap->iv_mesh, M_80211_VAP); 649 vap->iv_mesh = NULL; 650 } 651 652 static void 653 mesh_vattach(struct ieee80211vap *vap) 654 { 655 struct ieee80211_mesh_state *ms; 656 vap->iv_newstate = mesh_newstate; 657 vap->iv_input = mesh_input; 658 vap->iv_opdetach = mesh_vdetach; 659 vap->iv_recv_mgmt = mesh_recv_mgmt; 660 vap->iv_recv_ctl = mesh_recv_ctl; 661 ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 662 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 663 if (ms == NULL) { 664 printf("%s: couldn't alloc MBSS state\n", __func__); 665 return; 666 } 667 vap->iv_mesh = ms; 668 ms->ms_seq = 0; 669 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 670 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 671 TAILQ_INIT(&ms->ms_known_gates); 672 TAILQ_INIT(&ms->ms_routes); 673 MESH_RT_LOCK_INIT(ms, "MBSS"); 674 callout_init(&ms->ms_cleantimer, 1); 675 callout_init(&ms->ms_gatetimer, 1); 676 ms->ms_gateseq = 0; 677 mesh_select_proto_metric(vap, "AIRTIME"); 678 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 679 mesh_select_proto_path(vap, "HWMP"); 680 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 681 ms->ms_ppath->mpp_vattach(vap); 682 } 683 684 /* 685 * IEEE80211_M_MBSS vap state machine handler. 686 */ 687 static int 688 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 689 { 690 struct ieee80211_mesh_state *ms = vap->iv_mesh; 691 struct ieee80211com *ic = vap->iv_ic; 692 struct ieee80211_node *ni; 693 enum ieee80211_state ostate; 694 695 IEEE80211_LOCK_ASSERT(ic); 696 697 ostate = vap->iv_state; 698 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 699 __func__, ieee80211_state_name[ostate], 700 ieee80211_state_name[nstate], arg); 701 vap->iv_state = nstate; /* state transition */ 702 if (ostate != IEEE80211_S_SCAN) 703 ieee80211_cancel_scan(vap); /* background scan */ 704 ni = vap->iv_bss; /* NB: no reference held */ 705 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 706 callout_drain(&ms->ms_cleantimer); 707 callout_drain(&ms->ms_gatetimer); 708 } 709 switch (nstate) { 710 case IEEE80211_S_INIT: 711 switch (ostate) { 712 case IEEE80211_S_SCAN: 713 ieee80211_cancel_scan(vap); 714 break; 715 case IEEE80211_S_CAC: 716 ieee80211_dfs_cac_stop(vap); 717 break; 718 case IEEE80211_S_RUN: 719 ieee80211_iterate_nodes(&ic->ic_sta, 720 mesh_vdetach_peers, NULL); 721 break; 722 default: 723 break; 724 } 725 if (ostate != IEEE80211_S_INIT) { 726 /* NB: optimize INIT -> INIT case */ 727 ieee80211_reset_bss(vap); 728 ieee80211_mesh_rt_flush(vap); 729 } 730 break; 731 case IEEE80211_S_SCAN: 732 switch (ostate) { 733 case IEEE80211_S_INIT: 734 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 735 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 736 ms->ms_idlen != 0) { 737 /* 738 * Already have a channel and a mesh ID; bypass 739 * the scan and startup immediately. 740 */ 741 ieee80211_create_ibss(vap, vap->iv_des_chan); 742 break; 743 } 744 /* 745 * Initiate a scan. We can come here as a result 746 * of an IEEE80211_IOC_SCAN_REQ too in which case 747 * the vap will be marked with IEEE80211_FEXT_SCANREQ 748 * and the scan request parameters will be present 749 * in iv_scanreq. Otherwise we do the default. 750 */ 751 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 752 ieee80211_check_scan(vap, 753 vap->iv_scanreq_flags, 754 vap->iv_scanreq_duration, 755 vap->iv_scanreq_mindwell, 756 vap->iv_scanreq_maxdwell, 757 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 758 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 759 } else 760 ieee80211_check_scan_current(vap); 761 break; 762 default: 763 break; 764 } 765 break; 766 case IEEE80211_S_CAC: 767 /* 768 * Start CAC on a DFS channel. We come here when starting 769 * a bss on a DFS channel (see ieee80211_create_ibss). 770 */ 771 ieee80211_dfs_cac_start(vap); 772 break; 773 case IEEE80211_S_RUN: 774 switch (ostate) { 775 case IEEE80211_S_INIT: 776 /* 777 * Already have a channel; bypass the 778 * scan and startup immediately. 779 * Note that ieee80211_create_ibss will call 780 * back to do a RUN->RUN state change. 781 */ 782 ieee80211_create_ibss(vap, 783 ieee80211_ht_adjust_channel(ic, 784 ic->ic_curchan, vap->iv_flags_ht)); 785 /* NB: iv_bss is changed on return */ 786 break; 787 case IEEE80211_S_CAC: 788 /* 789 * NB: This is the normal state change when CAC 790 * expires and no radar was detected; no need to 791 * clear the CAC timer as it's already expired. 792 */ 793 /* fall thru... */ 794 case IEEE80211_S_CSA: 795 #if 0 796 /* 797 * Shorten inactivity timer of associated stations 798 * to weed out sta's that don't follow a CSA. 799 */ 800 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 801 #endif 802 /* 803 * Update bss node channel to reflect where 804 * we landed after CSA. 805 */ 806 ieee80211_node_set_chan(vap->iv_bss, 807 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 808 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 809 /* XXX bypass debug msgs */ 810 break; 811 case IEEE80211_S_SCAN: 812 case IEEE80211_S_RUN: 813 #ifdef IEEE80211_DEBUG 814 if (ieee80211_msg_debug(vap)) { 815 struct ieee80211_node *ni = vap->iv_bss; 816 ieee80211_note(vap, 817 "synchronized with %s meshid ", 818 ether_sprintf(ni->ni_meshid)); 819 ieee80211_print_essid(ni->ni_meshid, 820 ni->ni_meshidlen); 821 /* XXX MCS/HT */ 822 printf(" channel %d\n", 823 ieee80211_chan2ieee(ic, ic->ic_curchan)); 824 } 825 #endif 826 break; 827 default: 828 break; 829 } 830 ieee80211_node_authorize(vap->iv_bss); 831 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 832 mesh_rt_cleanup_cb, vap); 833 mesh_gatemode_setup(vap); 834 break; 835 default: 836 break; 837 } 838 /* NB: ostate not nstate */ 839 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 840 return 0; 841 } 842 843 static void 844 mesh_rt_cleanup_cb(void *arg) 845 { 846 struct ieee80211vap *vap = arg; 847 struct ieee80211_mesh_state *ms = vap->iv_mesh; 848 849 mesh_rt_flush_invalid(vap); 850 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 851 mesh_rt_cleanup_cb, vap); 852 } 853 854 /* 855 * Mark a mesh STA as gate and return a pointer to it. 856 * If this is first time, we create a new gate route. 857 * Always update the path route to this mesh gate. 858 */ 859 struct ieee80211_mesh_gate_route * 860 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 861 struct ieee80211_mesh_route *rt) 862 { 863 struct ieee80211_mesh_state *ms = vap->iv_mesh; 864 struct ieee80211_mesh_gate_route *gr = NULL, *next; 865 int found = 0; 866 867 MESH_RT_LOCK(ms); 868 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 869 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 870 found = 1; 871 break; 872 } 873 } 874 875 if (!found) { 876 /* New mesh gate add it to known table. */ 877 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 878 "%s", "stored new gate information from pro-PREQ."); 879 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 880 M_80211_MESH_GT_RT, 881 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 882 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 883 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 884 } 885 gr->gr_route = rt; 886 /* TODO: link from path route to gate route */ 887 MESH_RT_UNLOCK(ms); 888 889 return gr; 890 } 891 892 893 /* 894 * Helper function to note the Mesh Peer Link FSM change. 895 */ 896 static void 897 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 898 { 899 struct ieee80211vap *vap = ni->ni_vap; 900 struct ieee80211_mesh_state *ms = vap->iv_mesh; 901 #ifdef IEEE80211_DEBUG 902 static const char *meshlinkstates[] = { 903 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 904 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 905 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 906 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 907 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 908 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 909 }; 910 #endif 911 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 912 ni, "peer link: %s -> %s", 913 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 914 915 /* track neighbor count */ 916 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 917 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 918 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 919 ms->ms_neighbors++; 920 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 921 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 922 state != IEEE80211_NODE_MESH_ESTABLISHED) { 923 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 924 ms->ms_neighbors--; 925 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 926 } 927 ni->ni_mlstate = state; 928 switch (state) { 929 case IEEE80211_NODE_MESH_HOLDING: 930 ms->ms_ppath->mpp_peerdown(ni); 931 break; 932 case IEEE80211_NODE_MESH_ESTABLISHED: 933 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 934 break; 935 default: 936 break; 937 } 938 } 939 940 /* 941 * Helper function to generate a unique local ID required for mesh 942 * peer establishment. 943 */ 944 static void 945 mesh_checkid(void *arg, struct ieee80211_node *ni) 946 { 947 uint16_t *r = arg; 948 949 if (*r == ni->ni_mllid) 950 *(uint16_t *)arg = 0; 951 } 952 953 static uint32_t 954 mesh_generateid(struct ieee80211vap *vap) 955 { 956 int maxiter = 4; 957 uint16_t r; 958 959 do { 960 get_random_bytes(&r, 2); 961 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 962 maxiter--; 963 } while (r == 0 && maxiter > 0); 964 return r; 965 } 966 967 /* 968 * Verifies if we already received this packet by checking its 969 * sequence number. 970 * Returns 0 if the frame is to be accepted, 1 otherwise. 971 */ 972 static int 973 mesh_checkpseq(struct ieee80211vap *vap, 974 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 975 { 976 struct ieee80211_mesh_route *rt; 977 978 rt = ieee80211_mesh_rt_find(vap, source); 979 if (rt == NULL) { 980 rt = ieee80211_mesh_rt_add(vap, source); 981 if (rt == NULL) { 982 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 983 "%s", "add mcast route failed"); 984 vap->iv_stats.is_mesh_rtaddfailed++; 985 return 1; 986 } 987 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 988 "add mcast route, mesh seqno %d", seq); 989 rt->rt_lastmseq = seq; 990 return 0; 991 } 992 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 993 return 1; 994 } else { 995 rt->rt_lastmseq = seq; 996 return 0; 997 } 998 } 999 1000 /* 1001 * Iterate the routing table and locate the next hop. 1002 */ 1003 struct ieee80211_node * 1004 ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1005 const uint8_t dest[IEEE80211_ADDR_LEN]) 1006 { 1007 struct ieee80211_mesh_route *rt; 1008 1009 rt = ieee80211_mesh_rt_find(vap, dest); 1010 if (rt == NULL) 1011 return NULL; 1012 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1013 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1014 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1015 /* XXX stat */ 1016 return NULL; 1017 } 1018 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1019 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1020 if (rt == NULL) return NULL; 1021 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1022 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1023 "%s: meshgate !valid, flags 0x%x", __func__, 1024 rt->rt_flags); 1025 /* XXX stat */ 1026 return NULL; 1027 } 1028 } 1029 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1030 } 1031 1032 static void 1033 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1034 struct ieee80211_mesh_route *rt_gate) 1035 { 1036 struct ifnet *ifp = vap->iv_ifp; 1037 struct ieee80211_node *ni; 1038 1039 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1040 1041 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1042 if (ni == NULL) { 1043 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1044 m_freem(m); 1045 return; 1046 } 1047 1048 /* 1049 * Send through the VAP packet transmit path. 1050 * This consumes the node ref grabbed above and 1051 * the mbuf, regardless of whether there's a problem 1052 * or not. 1053 */ 1054 (void) ieee80211_vap_pkt_send_dest(vap, m, ni); 1055 } 1056 1057 /* 1058 * Forward the queued frames to known valid mesh gates. 1059 * Assume destination to be outside the MBSS (i.e. proxy entry), 1060 * If no valid mesh gates are known silently discard queued frames. 1061 * After transmitting frames to all known valid mesh gates, this route 1062 * will be marked invalid, and a new path discovery will happen in the hopes 1063 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1064 */ 1065 void 1066 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1067 struct ieee80211_mesh_route *rt_dest) 1068 { 1069 struct ieee80211com *ic = vap->iv_ic; 1070 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1071 struct ieee80211_mesh_route *rt_gate; 1072 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1073 struct mbuf *m, *mcopy, *next; 1074 1075 IEEE80211_TX_UNLOCK_ASSERT(ic); 1076 1077 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1078 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1079 1080 /* XXX: send to more than one valid mash gate */ 1081 MESH_RT_LOCK(ms); 1082 1083 m = ieee80211_ageq_remove(&ic->ic_stageq, 1084 (struct ieee80211_node *)(uintptr_t) 1085 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1086 1087 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1088 rt_gate = gr->gr_route; 1089 if (rt_gate == NULL) { 1090 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1091 rt_dest->rt_dest, 1092 "mesh gate with no path %6D", 1093 gr->gr_addr, ":"); 1094 continue; 1095 } 1096 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1097 continue; 1098 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1099 ("route not marked as a mesh gate")); 1100 KASSERT((rt_gate->rt_flags & 1101 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1102 ("found mesh gate that is also marked porxy")); 1103 /* 1104 * convert route to a proxy route gated by the current 1105 * mesh gate, this is needed so encap can built data 1106 * frame with correct address. 1107 */ 1108 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1109 IEEE80211_MESHRT_FLAGS_VALID; 1110 rt_dest->rt_ext_seq = 1; /* random value */ 1111 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1112 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1113 rt_dest->rt_metric = rt_gate->rt_metric; 1114 rt_dest->rt_nhops = rt_gate->rt_nhops; 1115 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1116 MESH_RT_UNLOCK(ms); 1117 /* XXX: lock?? */ 1118 mcopy = m_dup(m, M_NOWAIT); 1119 for (; mcopy != NULL; mcopy = next) { 1120 next = mcopy->m_nextpkt; 1121 mcopy->m_nextpkt = NULL; 1122 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1123 rt_dest->rt_dest, 1124 "flush queued frame %p len %d", mcopy, 1125 mcopy->m_pkthdr.len); 1126 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1127 } 1128 MESH_RT_LOCK(ms); 1129 } 1130 rt_dest->rt_flags = 0; /* Mark invalid */ 1131 m_freem(m); 1132 MESH_RT_UNLOCK(ms); 1133 } 1134 1135 /* 1136 * Forward the specified frame. 1137 * Decrement the TTL and set TA to our MAC address. 1138 */ 1139 static void 1140 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1141 const struct ieee80211_meshcntl *mc) 1142 { 1143 struct ieee80211com *ic = vap->iv_ic; 1144 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1145 struct ifnet *ifp = vap->iv_ifp; 1146 const struct ieee80211_frame *wh = 1147 mtod(m, const struct ieee80211_frame *); 1148 struct mbuf *mcopy; 1149 struct ieee80211_meshcntl *mccopy; 1150 struct ieee80211_frame *whcopy; 1151 struct ieee80211_node *ni; 1152 int err; 1153 1154 /* This is called from the RX path - don't hold this lock */ 1155 IEEE80211_TX_UNLOCK_ASSERT(ic); 1156 1157 /* 1158 * mesh ttl of 1 means we are the last one receving it, 1159 * according to amendment we decrement and then check if 1160 * 0, if so we dont forward. 1161 */ 1162 if (mc->mc_ttl < 1) { 1163 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1164 "%s", "frame not fwd'd, ttl 1"); 1165 vap->iv_stats.is_mesh_fwd_ttl++; 1166 return; 1167 } 1168 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1169 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1170 "%s", "frame not fwd'd, fwding disabled"); 1171 vap->iv_stats.is_mesh_fwd_disabled++; 1172 return; 1173 } 1174 mcopy = m_dup(m, M_NOWAIT); 1175 if (mcopy == NULL) { 1176 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1177 "%s", "frame not fwd'd, cannot dup"); 1178 vap->iv_stats.is_mesh_fwd_nobuf++; 1179 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1180 return; 1181 } 1182 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1183 sizeof(struct ieee80211_meshcntl)); 1184 if (mcopy == NULL) { 1185 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1186 "%s", "frame not fwd'd, too short"); 1187 vap->iv_stats.is_mesh_fwd_tooshort++; 1188 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1189 m_freem(mcopy); 1190 return; 1191 } 1192 whcopy = mtod(mcopy, struct ieee80211_frame *); 1193 mccopy = (struct ieee80211_meshcntl *) 1194 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1195 /* XXX clear other bits? */ 1196 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1197 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1198 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1199 ni = ieee80211_ref_node(vap->iv_bss); 1200 mcopy->m_flags |= M_MCAST; 1201 } else { 1202 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1203 if (ni == NULL) { 1204 /* 1205 * [Optional] any of the following three actions: 1206 * o silently discard 1207 * o trigger a path discovery 1208 * o inform TA that meshDA is unknown. 1209 */ 1210 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1211 "%s", "frame not fwd'd, no path"); 1212 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1213 IEEE80211_REASON_MESH_PERR_NO_FI); 1214 vap->iv_stats.is_mesh_fwd_nopath++; 1215 m_freem(mcopy); 1216 return; 1217 } 1218 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1219 } 1220 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1221 mccopy->mc_ttl--; 1222 1223 /* XXX calculate priority so drivers can find the tx queue */ 1224 M_WME_SETAC(mcopy, WME_AC_BE); 1225 1226 /* XXX do we know m_nextpkt is NULL? */ 1227 mcopy->m_pkthdr.rcvif = (void *) ni; 1228 1229 /* 1230 * XXX this bypasses all of the VAP TX handling; it passes frames 1231 * directly to the parent interface. 1232 * 1233 * Because of this, there's no TX lock being held as there's no 1234 * encaps state being used. 1235 * 1236 * Doing a direct parent transmit may not be the correct thing 1237 * to do here; we'll have to re-think this soon. 1238 */ 1239 IEEE80211_TX_LOCK(ic); 1240 err = ieee80211_parent_xmitpkt(ic, mcopy); 1241 IEEE80211_TX_UNLOCK(ic); 1242 if (!err) 1243 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1244 } 1245 1246 static struct mbuf * 1247 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1248 { 1249 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1250 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1251 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1252 sizeof(struct ieee80211_meshcntl_ae10)]; 1253 const struct ieee80211_qosframe_addr4 *wh; 1254 const struct ieee80211_meshcntl_ae10 *mc; 1255 struct ether_header *eh; 1256 struct llc *llc; 1257 int ae; 1258 1259 if (m->m_len < hdrlen + sizeof(*llc) && 1260 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1261 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1262 "discard data frame: %s", "m_pullup failed"); 1263 vap->iv_stats.is_rx_tooshort++; 1264 return NULL; 1265 } 1266 memcpy(b, mtod(m, caddr_t), hdrlen); 1267 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1268 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1269 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1270 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1271 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1272 1273 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1274 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1275 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1276 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1277 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1278 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1279 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1280 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1281 llc = NULL; 1282 } else { 1283 m_adj(m, hdrlen - sizeof(*eh)); 1284 } 1285 eh = mtod(m, struct ether_header *); 1286 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1287 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1288 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1289 if (ae == IEEE80211_MESH_AE_00) { 1290 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1291 } else if (ae == IEEE80211_MESH_AE_01) { 1292 IEEE80211_ADDR_COPY(eh->ether_shost, 1293 MC01(mc)->mc_addr4); 1294 } else { 1295 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1296 (const struct ieee80211_frame *)wh, NULL, 1297 "bad AE %d", ae); 1298 vap->iv_stats.is_mesh_badae++; 1299 m_freem(m); 1300 return NULL; 1301 } 1302 } else { 1303 if (ae == IEEE80211_MESH_AE_00) { 1304 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1305 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1306 } else if (ae == IEEE80211_MESH_AE_10) { 1307 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1308 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1309 } else { 1310 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1311 (const struct ieee80211_frame *)wh, NULL, 1312 "bad AE %d", ae); 1313 vap->iv_stats.is_mesh_badae++; 1314 m_freem(m); 1315 return NULL; 1316 } 1317 } 1318 #ifndef __NO_STRICT_ALIGNMENT 1319 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1320 m = ieee80211_realign(vap, m, sizeof(*eh)); 1321 if (m == NULL) 1322 return NULL; 1323 } 1324 #endif /* !__NO_STRICT_ALIGNMENT */ 1325 if (llc != NULL) { 1326 eh = mtod(m, struct ether_header *); 1327 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1328 } 1329 return m; 1330 #undef WDIR 1331 #undef MC01 1332 } 1333 1334 /* 1335 * Return non-zero if the unicast mesh data frame should be processed 1336 * locally. Frames that are not proxy'd have our address, otherwise 1337 * we need to consult the routing table to look for a proxy entry. 1338 */ 1339 static __inline int 1340 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1341 const struct ieee80211_meshcntl *mc) 1342 { 1343 int ae = mc->mc_flags & 3; 1344 1345 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1346 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1347 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1348 ("bad AE %d", ae)); 1349 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1350 const struct ieee80211_meshcntl_ae10 *mc10 = 1351 (const struct ieee80211_meshcntl_ae10 *) mc; 1352 struct ieee80211_mesh_route *rt = 1353 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1354 /* check for proxy route to ourself */ 1355 return (rt != NULL && 1356 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1357 } else /* ucast w/o proxy */ 1358 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1359 } 1360 1361 /* 1362 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1363 * > 0 means we have forwarded data and no need to process locally 1364 * == 0 means we want to process locally (and we may have forwarded data 1365 * < 0 means there was an error and data should be discarded 1366 */ 1367 static int 1368 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1369 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1370 { 1371 struct ieee80211_qosframe_addr4 *qwh; 1372 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1373 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1374 1375 /* This is called from the RX path - don't hold this lock */ 1376 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1377 1378 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1379 1380 /* 1381 * TODO: 1382 * o verify addr2 is a legitimate transmitter 1383 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1384 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1385 */ 1386 1387 /* set lifetime of addr3 (meshDA) to initial value */ 1388 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1389 if (rt_meshda == NULL) { 1390 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1391 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1392 /* 1393 * [Optional] any of the following three actions: 1394 * o silently discard [X] 1395 * o trigger a path discovery [ ] 1396 * o inform TA that meshDA is unknown. [ ] 1397 */ 1398 /* XXX: stats */ 1399 return (-1); 1400 } 1401 1402 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1403 ms->ms_ppath->mpp_inact)); 1404 1405 /* set lifetime of addr4 (meshSA) to initial value */ 1406 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1407 KASSERT(rt_meshsa != NULL, ("no route")); 1408 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1409 ms->ms_ppath->mpp_inact)); 1410 1411 mesh_forward(vap, m, mc); 1412 return (1); /* dont process locally */ 1413 } 1414 1415 /* 1416 * Verifies transmitter, updates lifetime, precursor list and process data 1417 * locally, if data is proxy with AE = 10 it could mean data should go 1418 * on another mesh path or data should be forwarded to the DS. 1419 * 1420 * > 0 means we have forwarded data and no need to process locally 1421 * == 0 means we want to process locally (and we may have forwarded data 1422 * < 0 means there was an error and data should be discarded 1423 */ 1424 static int 1425 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1426 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1427 { 1428 struct ieee80211_qosframe_addr4 *qwh; 1429 const struct ieee80211_meshcntl_ae10 *mc10; 1430 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1431 struct ieee80211_mesh_route *rt; 1432 int ae; 1433 1434 /* This is called from the RX path - don't hold this lock */ 1435 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1436 1437 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1438 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1439 1440 /* 1441 * TODO: 1442 * o verify addr2 is a legitimate transmitter 1443 * o lifetime of precursor entry is max(init, curr) 1444 */ 1445 1446 /* set lifetime of addr4 (meshSA) to initial value */ 1447 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1448 KASSERT(rt != NULL, ("no route")); 1449 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1450 rt = NULL; 1451 1452 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1453 KASSERT(ae == IEEE80211_MESH_AE_00 || 1454 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1455 if (ae == IEEE80211_MESH_AE_10) { 1456 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1457 return (0); /* process locally */ 1458 } 1459 1460 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1461 if (rt != NULL && 1462 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1463 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1464 /* 1465 * Forward on another mesh-path, according to 1466 * amendment as specified in 9.32.4.1 1467 */ 1468 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1469 mesh_forward(vap, m, 1470 (const struct ieee80211_meshcntl *)mc10); 1471 return (1); /* dont process locally */ 1472 } 1473 /* 1474 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1475 * addressed according to 13.11.3.2. 1476 */ 1477 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1478 "forward frame to DS, SA(%6D) DA(%6D)", 1479 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1480 } 1481 return (0); /* process locally */ 1482 } 1483 1484 /* 1485 * Try to forward the group addressed data on to other mesh STAs, and 1486 * also to the DS. 1487 * 1488 * > 0 means we have forwarded data and no need to process locally 1489 * == 0 means we want to process locally (and we may have forwarded data 1490 * < 0 means there was an error and data should be discarded 1491 */ 1492 static int 1493 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1494 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1495 { 1496 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1497 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1498 1499 /* This is called from the RX path - don't hold this lock */ 1500 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1501 1502 mesh_forward(vap, m, mc); 1503 1504 if(mc->mc_ttl > 0) { 1505 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1506 /* 1507 * Forward of MSDUs from the MBSS to DS group addressed 1508 * (according to 13.11.3.2) 1509 * This happens by delivering the packet, and a bridge 1510 * will sent it on another port member. 1511 */ 1512 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1513 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1514 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1515 MC01(mc)->mc_addr4, "%s", 1516 "forward from MBSS to the DS"); 1517 } 1518 } 1519 return (0); /* process locally */ 1520 #undef MC01 1521 } 1522 1523 static int 1524 mesh_input(struct ieee80211_node *ni, struct mbuf *m, 1525 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1526 { 1527 #define HAS_SEQ(type) ((type & 0x4) == 0) 1528 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1529 #define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1530 struct ieee80211vap *vap = ni->ni_vap; 1531 struct ieee80211com *ic = ni->ni_ic; 1532 struct ifnet *ifp = vap->iv_ifp; 1533 struct ieee80211_frame *wh; 1534 const struct ieee80211_meshcntl *mc; 1535 int hdrspace, meshdrlen, need_tap, error; 1536 uint8_t dir, type, subtype, ae; 1537 uint32_t seq; 1538 const uint8_t *addr; 1539 uint8_t qos[2]; 1540 ieee80211_seq rxseq; 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 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1586 if (! ieee80211_check_rxseq(ni, wh)) { 1587 /* duplicate, discard */ 1588 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1589 wh->i_addr1, "duplicate", 1590 "seqno <%u,%u> fragno <%u,%u> tid %u", 1591 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1592 ni->ni_rxseqs[tid] >> 1593 IEEE80211_SEQ_SEQ_SHIFT, 1594 rxseq & IEEE80211_SEQ_FRAG_MASK, 1595 ni->ni_rxseqs[tid] & 1596 IEEE80211_SEQ_FRAG_MASK, 1597 tid); 1598 vap->iv_stats.is_rx_dup++; 1599 IEEE80211_NODE_STAT(ni, rx_dup); 1600 goto out; 1601 } 1602 ni->ni_rxseqs[tid] = rxseq; 1603 } 1604 } 1605 #ifdef IEEE80211_DEBUG 1606 /* 1607 * It's easier, but too expensive, to simulate different mesh 1608 * topologies by consulting the ACL policy very early, so do this 1609 * only under DEBUG. 1610 * 1611 * NB: this check is also done upon peering link initiation. 1612 */ 1613 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1614 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1615 wh, NULL, "%s", "disallowed by ACL"); 1616 vap->iv_stats.is_rx_acl++; 1617 goto out; 1618 } 1619 #endif 1620 switch (type) { 1621 case IEEE80211_FC0_TYPE_DATA: 1622 if (ni == vap->iv_bss) 1623 goto out; 1624 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1625 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1626 ni->ni_macaddr, NULL, 1627 "peer link not yet established (%d)", 1628 ni->ni_mlstate); 1629 vap->iv_stats.is_mesh_nolink++; 1630 goto out; 1631 } 1632 if (dir != IEEE80211_FC1_DIR_FROMDS && 1633 dir != IEEE80211_FC1_DIR_DSTODS) { 1634 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1635 wh, "data", "incorrect dir 0x%x", dir); 1636 vap->iv_stats.is_rx_wrongdir++; 1637 goto err; 1638 } 1639 1640 /* All Mesh data frames are QoS subtype */ 1641 if (!HAS_SEQ(type)) { 1642 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1643 wh, "data", "incorrect subtype 0x%x", subtype); 1644 vap->iv_stats.is_rx_badsubtype++; 1645 goto err; 1646 } 1647 1648 /* 1649 * Next up, any fragmentation. 1650 * XXX: we defrag before we even try to forward, 1651 * Mesh Control field is not present in sub-sequent 1652 * fragmented frames. This is in contrast to Draft 4.0. 1653 */ 1654 hdrspace = ieee80211_hdrspace(ic, wh); 1655 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1656 m = ieee80211_defrag(ni, m, hdrspace); 1657 if (m == NULL) { 1658 /* Fragment dropped or frame not complete yet */ 1659 goto out; 1660 } 1661 } 1662 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1663 1664 /* 1665 * Now we have a complete Mesh Data frame. 1666 */ 1667 1668 /* 1669 * Only fromDStoDS data frames use 4 address qos frames 1670 * as specified in amendment. Otherwise addr4 is located 1671 * in the Mesh Control field and a 3 address qos frame 1672 * is used. 1673 */ 1674 if (IEEE80211_IS_DSTODS(wh)) 1675 *(uint16_t *)qos = *(uint16_t *) 1676 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1677 else 1678 *(uint16_t *)qos = *(uint16_t *) 1679 ((struct ieee80211_qosframe *)wh)->i_qos; 1680 1681 /* 1682 * NB: The mesh STA sets the Mesh Control Present 1683 * subfield to 1 in the Mesh Data frame containing 1684 * an unfragmented MSDU, an A-MSDU, or the first 1685 * fragment of an MSDU. 1686 * After defrag it should always be present. 1687 */ 1688 if (!(qos[1] & IEEE80211_QOS_MC)) { 1689 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1690 ni->ni_macaddr, NULL, 1691 "%s", "Mesh control field not present"); 1692 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1693 goto err; 1694 } 1695 1696 /* pull up enough to get to the mesh control */ 1697 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1698 (m = m_pullup(m, hdrspace + 1699 sizeof(struct ieee80211_meshcntl))) == NULL) { 1700 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1701 ni->ni_macaddr, NULL, 1702 "data too short: expecting %u", hdrspace); 1703 vap->iv_stats.is_rx_tooshort++; 1704 goto out; /* XXX */ 1705 } 1706 /* 1707 * Now calculate the full extent of the headers. Note 1708 * mesh_decap will pull up anything we didn't get 1709 * above when it strips the 802.11 headers. 1710 */ 1711 mc = (const struct ieee80211_meshcntl *) 1712 (mtod(m, const uint8_t *) + hdrspace); 1713 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1714 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1715 ae * IEEE80211_ADDR_LEN; 1716 hdrspace += meshdrlen; 1717 1718 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1719 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1720 (m->m_len < hdrspace) && 1721 ((m = m_pullup(m, hdrspace)) == NULL)) { 1722 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1723 ni->ni_macaddr, NULL, 1724 "data too short: expecting %u", hdrspace); 1725 vap->iv_stats.is_rx_tooshort++; 1726 goto out; /* XXX */ 1727 } 1728 /* XXX: are we sure there is no reallocating after m_pullup? */ 1729 1730 seq = LE_READ_4(mc->mc_seq); 1731 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1732 addr = wh->i_addr3; 1733 else if (ae == IEEE80211_MESH_AE_01) 1734 addr = MC01(mc)->mc_addr4; 1735 else 1736 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1737 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1738 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1739 addr, "data", "%s", "not to me"); 1740 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1741 goto out; 1742 } 1743 if (mesh_checkpseq(vap, addr, seq) != 0) { 1744 vap->iv_stats.is_rx_dup++; 1745 goto out; 1746 } 1747 1748 /* This code "routes" the frame to the right control path */ 1749 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1750 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1751 error = 1752 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1753 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1754 error = mesh_recv_group_data(vap, m, wh, mc); 1755 else 1756 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1757 wh, mc); 1758 } else 1759 error = mesh_recv_group_data(vap, m, wh, mc); 1760 if (error < 0) 1761 goto err; 1762 else if (error > 0) 1763 goto out; 1764 1765 if (ieee80211_radiotap_active_vap(vap)) 1766 ieee80211_radiotap_rx(vap, m); 1767 need_tap = 0; 1768 1769 /* 1770 * Finally, strip the 802.11 header. 1771 */ 1772 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1773 if (m == NULL) { 1774 /* XXX mask bit to check for both */ 1775 /* don't count Null data frames as errors */ 1776 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1777 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1778 goto out; 1779 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1780 ni->ni_macaddr, "data", "%s", "decap error"); 1781 vap->iv_stats.is_rx_decap++; 1782 IEEE80211_NODE_STAT(ni, rx_decap); 1783 goto err; 1784 } 1785 if (qos[0] & IEEE80211_QOS_AMSDU) { 1786 m = ieee80211_decap_amsdu(ni, m); 1787 if (m == NULL) 1788 return IEEE80211_FC0_TYPE_DATA; 1789 } 1790 ieee80211_deliver_data(vap, ni, m); 1791 return type; 1792 case IEEE80211_FC0_TYPE_MGT: 1793 vap->iv_stats.is_rx_mgmt++; 1794 IEEE80211_NODE_STAT(ni, rx_mgmt); 1795 if (dir != IEEE80211_FC1_DIR_NODS) { 1796 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1797 wh, "mgt", "incorrect dir 0x%x", dir); 1798 vap->iv_stats.is_rx_wrongdir++; 1799 goto err; 1800 } 1801 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1802 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1803 ni->ni_macaddr, "mgt", "too short: len %u", 1804 m->m_pkthdr.len); 1805 vap->iv_stats.is_rx_tooshort++; 1806 goto out; 1807 } 1808 #ifdef IEEE80211_DEBUG 1809 if ((ieee80211_msg_debug(vap) && 1810 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1811 ieee80211_msg_dumppkts(vap)) { 1812 if_printf(ifp, "received %s from %s rssi %d\n", 1813 ieee80211_mgt_subtype_name[subtype >> 1814 IEEE80211_FC0_SUBTYPE_SHIFT], 1815 ether_sprintf(wh->i_addr2), rssi); 1816 } 1817 #endif 1818 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1819 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1820 wh, NULL, "%s", "WEP set but not permitted"); 1821 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1822 goto out; 1823 } 1824 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 1825 goto out; 1826 case IEEE80211_FC0_TYPE_CTL: 1827 vap->iv_stats.is_rx_ctl++; 1828 IEEE80211_NODE_STAT(ni, rx_ctrl); 1829 goto out; 1830 default: 1831 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1832 wh, "bad", "frame type 0x%x", type); 1833 /* should not come here */ 1834 break; 1835 } 1836 err: 1837 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1838 out: 1839 if (m != NULL) { 1840 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1841 ieee80211_radiotap_rx(vap, m); 1842 m_freem(m); 1843 } 1844 return type; 1845 #undef HAS_SEQ 1846 #undef MC01 1847 #undef MC10 1848 } 1849 1850 static void 1851 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1852 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1853 { 1854 struct ieee80211vap *vap = ni->ni_vap; 1855 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1856 struct ieee80211com *ic = ni->ni_ic; 1857 struct ieee80211_channel *rxchan = ic->ic_curchan; 1858 struct ieee80211_frame *wh; 1859 struct ieee80211_mesh_route *rt; 1860 uint8_t *frm, *efrm; 1861 1862 wh = mtod(m0, struct ieee80211_frame *); 1863 frm = (uint8_t *)&wh[1]; 1864 efrm = mtod(m0, uint8_t *) + m0->m_len; 1865 switch (subtype) { 1866 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1867 case IEEE80211_FC0_SUBTYPE_BEACON: 1868 { 1869 struct ieee80211_scanparams scan; 1870 struct ieee80211_channel *c; 1871 /* 1872 * We process beacon/probe response 1873 * frames to discover neighbors. 1874 */ 1875 if (rxs != NULL) { 1876 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1877 if (c != NULL) 1878 rxchan = c; 1879 } 1880 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) 1881 return; 1882 /* 1883 * Count frame now that we know it's to be processed. 1884 */ 1885 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1886 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1887 IEEE80211_NODE_STAT(ni, rx_beacons); 1888 } else 1889 IEEE80211_NODE_STAT(ni, rx_proberesp); 1890 /* 1891 * If scanning, just pass information to the scan module. 1892 */ 1893 if (ic->ic_flags & IEEE80211_F_SCAN) { 1894 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1895 /* 1896 * Actively scanning a channel marked passive; 1897 * send a probe request now that we know there 1898 * is 802.11 traffic present. 1899 * 1900 * XXX check if the beacon we recv'd gives 1901 * us what we need and suppress the probe req 1902 */ 1903 ieee80211_probe_curchan(vap, 1); 1904 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1905 } 1906 ieee80211_add_scan(vap, rxchan, &scan, wh, 1907 subtype, rssi, nf); 1908 return; 1909 } 1910 1911 /* The rest of this code assumes we are running */ 1912 if (vap->iv_state != IEEE80211_S_RUN) 1913 return; 1914 /* 1915 * Ignore non-mesh STAs. 1916 */ 1917 if ((scan.capinfo & 1918 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1919 scan.meshid == NULL || scan.meshconf == NULL) { 1920 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1921 wh, "beacon", "%s", "not a mesh sta"); 1922 vap->iv_stats.is_mesh_wrongmesh++; 1923 return; 1924 } 1925 /* 1926 * Ignore STAs for other mesh networks. 1927 */ 1928 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1929 mesh_verify_meshconf(vap, scan.meshconf)) { 1930 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1931 wh, "beacon", "%s", "not for our mesh"); 1932 vap->iv_stats.is_mesh_wrongmesh++; 1933 return; 1934 } 1935 /* 1936 * Peer only based on the current ACL policy. 1937 */ 1938 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1939 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1940 wh, NULL, "%s", "disallowed by ACL"); 1941 vap->iv_stats.is_rx_acl++; 1942 return; 1943 } 1944 /* 1945 * Do neighbor discovery. 1946 */ 1947 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1948 /* 1949 * Create a new entry in the neighbor table. 1950 */ 1951 ni = ieee80211_add_neighbor(vap, wh, &scan); 1952 } 1953 /* 1954 * Automatically peer with discovered nodes if possible. 1955 */ 1956 if (ni != vap->iv_bss && 1957 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1958 switch (ni->ni_mlstate) { 1959 case IEEE80211_NODE_MESH_IDLE: 1960 { 1961 uint16_t args[1]; 1962 1963 /* Wait for backoff callout to reset counter */ 1964 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1965 return; 1966 1967 ni->ni_mlpid = mesh_generateid(vap); 1968 if (ni->ni_mlpid == 0) 1969 return; 1970 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1971 args[0] = ni->ni_mlpid; 1972 ieee80211_send_action(ni, 1973 IEEE80211_ACTION_CAT_SELF_PROT, 1974 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1975 ni->ni_mlrcnt = 0; 1976 mesh_peer_timeout_setup(ni); 1977 break; 1978 } 1979 case IEEE80211_NODE_MESH_ESTABLISHED: 1980 { 1981 /* 1982 * Valid beacon from a peer mesh STA 1983 * bump TA lifetime 1984 */ 1985 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1986 if(rt != NULL) { 1987 ieee80211_mesh_rt_update(rt, 1988 ticks_to_msecs( 1989 ms->ms_ppath->mpp_inact)); 1990 } 1991 break; 1992 } 1993 default: 1994 break; /* ignore */ 1995 } 1996 } 1997 break; 1998 } 1999 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2000 { 2001 uint8_t *ssid, *meshid, *rates, *xrates; 2002 uint8_t *sfrm; 2003 2004 if (vap->iv_state != IEEE80211_S_RUN) { 2005 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2006 wh, NULL, "wrong state %s", 2007 ieee80211_state_name[vap->iv_state]); 2008 vap->iv_stats.is_rx_mgtdiscard++; 2009 return; 2010 } 2011 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 2012 /* frame must be directed */ 2013 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2014 wh, NULL, "%s", "not unicast"); 2015 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 2016 return; 2017 } 2018 /* 2019 * prreq frame format 2020 * [tlv] ssid 2021 * [tlv] supported rates 2022 * [tlv] extended supported rates 2023 * [tlv] mesh id 2024 */ 2025 ssid = meshid = rates = xrates = NULL; 2026 sfrm = frm; 2027 while (efrm - frm > 1) { 2028 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2029 switch (*frm) { 2030 case IEEE80211_ELEMID_SSID: 2031 ssid = frm; 2032 break; 2033 case IEEE80211_ELEMID_RATES: 2034 rates = frm; 2035 break; 2036 case IEEE80211_ELEMID_XRATES: 2037 xrates = frm; 2038 break; 2039 case IEEE80211_ELEMID_MESHID: 2040 meshid = frm; 2041 break; 2042 } 2043 frm += frm[1] + 2; 2044 } 2045 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2046 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2047 if (xrates != NULL) 2048 IEEE80211_VERIFY_ELEMENT(xrates, 2049 IEEE80211_RATE_MAXSIZE - rates[1], return); 2050 if (meshid != NULL) { 2051 IEEE80211_VERIFY_ELEMENT(meshid, 2052 IEEE80211_MESHID_LEN, return); 2053 /* NB: meshid, not ssid */ 2054 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2055 } 2056 2057 /* XXX find a better class or define it's own */ 2058 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2059 "%s", "recv probe req"); 2060 /* 2061 * Some legacy 11b clients cannot hack a complete 2062 * probe response frame. When the request includes 2063 * only a bare-bones rate set, communicate this to 2064 * the transmit side. 2065 */ 2066 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2067 break; 2068 } 2069 2070 case IEEE80211_FC0_SUBTYPE_ACTION: 2071 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2072 if (ni == vap->iv_bss) { 2073 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2074 wh, NULL, "%s", "unknown node"); 2075 vap->iv_stats.is_rx_mgtdiscard++; 2076 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2077 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2078 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2079 wh, NULL, "%s", "not for us"); 2080 vap->iv_stats.is_rx_mgtdiscard++; 2081 } else if (vap->iv_state != IEEE80211_S_RUN) { 2082 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2083 wh, NULL, "wrong state %s", 2084 ieee80211_state_name[vap->iv_state]); 2085 vap->iv_stats.is_rx_mgtdiscard++; 2086 } else { 2087 if (ieee80211_parse_action(ni, m0) == 0) 2088 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2089 } 2090 break; 2091 2092 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2093 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2094 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2095 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2096 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 2097 case IEEE80211_FC0_SUBTYPE_ATIM: 2098 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2099 case IEEE80211_FC0_SUBTYPE_AUTH: 2100 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2101 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2102 wh, NULL, "%s", "not handled"); 2103 vap->iv_stats.is_rx_mgtdiscard++; 2104 break; 2105 2106 default: 2107 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2108 wh, "mgt", "subtype 0x%x not handled", subtype); 2109 vap->iv_stats.is_rx_badsubtype++; 2110 break; 2111 } 2112 } 2113 2114 static void 2115 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2116 { 2117 2118 switch (subtype) { 2119 case IEEE80211_FC0_SUBTYPE_BAR: 2120 ieee80211_recv_bar(ni, m); 2121 break; 2122 } 2123 } 2124 2125 /* 2126 * Parse meshpeering action ie's for MPM frames 2127 */ 2128 static const struct ieee80211_meshpeer_ie * 2129 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2130 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2131 const uint8_t *frm, const uint8_t *efrm, 2132 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2133 { 2134 struct ieee80211vap *vap = ni->ni_vap; 2135 const struct ieee80211_meshpeer_ie *mpie; 2136 uint16_t args[3]; 2137 const uint8_t *meshid, *meshconf, *meshpeer; 2138 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2139 2140 meshid = meshconf = meshpeer = NULL; 2141 while (efrm - frm > 1) { 2142 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2143 switch (*frm) { 2144 case IEEE80211_ELEMID_MESHID: 2145 meshid = frm; 2146 break; 2147 case IEEE80211_ELEMID_MESHCONF: 2148 meshconf = frm; 2149 break; 2150 case IEEE80211_ELEMID_MESHPEER: 2151 meshpeer = frm; 2152 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2153 memset(mp, 0, sizeof(*mp)); 2154 mp->peer_len = mpie->peer_len; 2155 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 2156 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 2157 switch (subtype) { 2158 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2159 mp->peer_linkid = 2160 LE_READ_2(&mpie->peer_linkid); 2161 break; 2162 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2163 /* NB: peer link ID is optional */ 2164 if (mpie->peer_len == 2165 (IEEE80211_MPM_BASE_SZ + 2)) { 2166 mp->peer_linkid = 0; 2167 mp->peer_rcode = 2168 LE_READ_2(&mpie->peer_linkid); 2169 } else { 2170 mp->peer_linkid = 2171 LE_READ_2(&mpie->peer_linkid); 2172 mp->peer_rcode = 2173 LE_READ_2(&mpie->peer_rcode); 2174 } 2175 break; 2176 } 2177 break; 2178 } 2179 frm += frm[1] + 2; 2180 } 2181 2182 /* 2183 * Verify the contents of the frame. 2184 * If it fails validation, close the peer link. 2185 */ 2186 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2187 sendclose = 1; 2188 IEEE80211_DISCARD(vap, 2189 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2190 wh, NULL, "%s", "MPM validation failed"); 2191 } 2192 2193 /* If meshid is not the same reject any frames type. */ 2194 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2195 sendclose = 1; 2196 IEEE80211_DISCARD(vap, 2197 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2198 wh, NULL, "%s", "not for our mesh"); 2199 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2200 /* 2201 * Standard not clear about this, if we dont ignore 2202 * there will be an endless loop between nodes sending 2203 * CLOSE frames between each other with wrong meshid. 2204 * Discard and timers will bring FSM to IDLE state. 2205 */ 2206 return NULL; 2207 } 2208 } 2209 2210 /* 2211 * Close frames are accepted if meshid is the same. 2212 * Verify the other two types. 2213 */ 2214 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2215 mesh_verify_meshconf(vap, meshconf)) { 2216 sendclose = 1; 2217 IEEE80211_DISCARD(vap, 2218 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2219 wh, NULL, "%s", "configuration missmatch"); 2220 } 2221 2222 if (sendclose) { 2223 vap->iv_stats.is_rx_mgtdiscard++; 2224 switch (ni->ni_mlstate) { 2225 case IEEE80211_NODE_MESH_IDLE: 2226 case IEEE80211_NODE_MESH_ESTABLISHED: 2227 case IEEE80211_NODE_MESH_HOLDING: 2228 /* ignore */ 2229 break; 2230 case IEEE80211_NODE_MESH_OPENSNT: 2231 case IEEE80211_NODE_MESH_OPENRCV: 2232 case IEEE80211_NODE_MESH_CONFIRMRCV: 2233 args[0] = ni->ni_mlpid; 2234 args[1] = ni->ni_mllid; 2235 /* Reason codes for rejection */ 2236 switch (subtype) { 2237 case IEEE80211_ACTION_MESHPEERING_OPEN: 2238 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2239 break; 2240 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2241 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2242 break; 2243 } 2244 ieee80211_send_action(ni, 2245 IEEE80211_ACTION_CAT_SELF_PROT, 2246 IEEE80211_ACTION_MESHPEERING_CLOSE, 2247 args); 2248 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2249 mesh_peer_timeout_setup(ni); 2250 break; 2251 } 2252 return NULL; 2253 } 2254 2255 return (const struct ieee80211_meshpeer_ie *) mp; 2256 } 2257 2258 static int 2259 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2260 const struct ieee80211_frame *wh, 2261 const uint8_t *frm, const uint8_t *efrm) 2262 { 2263 struct ieee80211vap *vap = ni->ni_vap; 2264 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2265 struct ieee80211_meshpeer_ie ie; 2266 const struct ieee80211_meshpeer_ie *meshpeer; 2267 uint16_t args[3]; 2268 2269 /* +2+2 for action + code + capabilites */ 2270 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2271 IEEE80211_ACTION_MESHPEERING_OPEN); 2272 if (meshpeer == NULL) { 2273 return 0; 2274 } 2275 2276 /* XXX move up */ 2277 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2278 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2279 2280 switch (ni->ni_mlstate) { 2281 case IEEE80211_NODE_MESH_IDLE: 2282 /* Reject open request if reached our maximum neighbor count */ 2283 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2284 args[0] = meshpeer->peer_llinkid; 2285 args[1] = 0; 2286 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2287 ieee80211_send_action(ni, 2288 IEEE80211_ACTION_CAT_SELF_PROT, 2289 IEEE80211_ACTION_MESHPEERING_CLOSE, 2290 args); 2291 /* stay in IDLE state */ 2292 return (0); 2293 } 2294 /* Open frame accepted */ 2295 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2296 ni->ni_mllid = meshpeer->peer_llinkid; 2297 ni->ni_mlpid = mesh_generateid(vap); 2298 if (ni->ni_mlpid == 0) 2299 return 0; /* XXX */ 2300 args[0] = ni->ni_mlpid; 2301 /* Announce we're open too... */ 2302 ieee80211_send_action(ni, 2303 IEEE80211_ACTION_CAT_SELF_PROT, 2304 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2305 /* ...and confirm the link. */ 2306 args[0] = ni->ni_mlpid; 2307 args[1] = ni->ni_mllid; 2308 ieee80211_send_action(ni, 2309 IEEE80211_ACTION_CAT_SELF_PROT, 2310 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2311 args); 2312 mesh_peer_timeout_setup(ni); 2313 break; 2314 case IEEE80211_NODE_MESH_OPENRCV: 2315 /* Wrong Link ID */ 2316 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2317 args[0] = ni->ni_mllid; 2318 args[1] = ni->ni_mlpid; 2319 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2320 ieee80211_send_action(ni, 2321 IEEE80211_ACTION_CAT_SELF_PROT, 2322 IEEE80211_ACTION_MESHPEERING_CLOSE, 2323 args); 2324 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2325 mesh_peer_timeout_setup(ni); 2326 break; 2327 } 2328 /* Duplicate open, confirm again. */ 2329 args[0] = ni->ni_mlpid; 2330 args[1] = ni->ni_mllid; 2331 ieee80211_send_action(ni, 2332 IEEE80211_ACTION_CAT_SELF_PROT, 2333 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2334 args); 2335 break; 2336 case IEEE80211_NODE_MESH_OPENSNT: 2337 ni->ni_mllid = meshpeer->peer_llinkid; 2338 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2339 args[0] = ni->ni_mlpid; 2340 args[1] = ni->ni_mllid; 2341 ieee80211_send_action(ni, 2342 IEEE80211_ACTION_CAT_SELF_PROT, 2343 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2344 args); 2345 /* NB: don't setup/clear any timeout */ 2346 break; 2347 case IEEE80211_NODE_MESH_CONFIRMRCV: 2348 if (ni->ni_mlpid != meshpeer->peer_linkid || 2349 ni->ni_mllid != meshpeer->peer_llinkid) { 2350 args[0] = ni->ni_mlpid; 2351 args[1] = ni->ni_mllid; 2352 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2353 ieee80211_send_action(ni, 2354 IEEE80211_ACTION_CAT_SELF_PROT, 2355 IEEE80211_ACTION_MESHPEERING_CLOSE, 2356 args); 2357 mesh_linkchange(ni, 2358 IEEE80211_NODE_MESH_HOLDING); 2359 mesh_peer_timeout_setup(ni); 2360 break; 2361 } 2362 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2363 ni->ni_mllid = meshpeer->peer_llinkid; 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 mesh_peer_timeout_stop(ni); 2371 break; 2372 case IEEE80211_NODE_MESH_ESTABLISHED: 2373 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2374 args[0] = ni->ni_mllid; 2375 args[1] = ni->ni_mlpid; 2376 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2377 ieee80211_send_action(ni, 2378 IEEE80211_ACTION_CAT_SELF_PROT, 2379 IEEE80211_ACTION_MESHPEERING_CLOSE, 2380 args); 2381 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2382 mesh_peer_timeout_setup(ni); 2383 break; 2384 } 2385 args[0] = ni->ni_mlpid; 2386 args[1] = ni->ni_mllid; 2387 ieee80211_send_action(ni, 2388 IEEE80211_ACTION_CAT_SELF_PROT, 2389 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2390 args); 2391 break; 2392 case IEEE80211_NODE_MESH_HOLDING: 2393 args[0] = ni->ni_mlpid; 2394 args[1] = meshpeer->peer_llinkid; 2395 /* Standard not clear about what the reaason code should be */ 2396 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2397 ieee80211_send_action(ni, 2398 IEEE80211_ACTION_CAT_SELF_PROT, 2399 IEEE80211_ACTION_MESHPEERING_CLOSE, 2400 args); 2401 break; 2402 } 2403 return 0; 2404 } 2405 2406 static int 2407 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2408 const struct ieee80211_frame *wh, 2409 const uint8_t *frm, const uint8_t *efrm) 2410 { 2411 struct ieee80211vap *vap = ni->ni_vap; 2412 struct ieee80211_meshpeer_ie ie; 2413 const struct ieee80211_meshpeer_ie *meshpeer; 2414 uint16_t args[3]; 2415 2416 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2417 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2418 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2419 if (meshpeer == NULL) { 2420 return 0; 2421 } 2422 2423 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2424 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2425 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2426 2427 switch (ni->ni_mlstate) { 2428 case IEEE80211_NODE_MESH_OPENRCV: 2429 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2430 mesh_peer_timeout_stop(ni); 2431 break; 2432 case IEEE80211_NODE_MESH_OPENSNT: 2433 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2434 mesh_peer_timeout_setup(ni); 2435 break; 2436 case IEEE80211_NODE_MESH_HOLDING: 2437 args[0] = ni->ni_mlpid; 2438 args[1] = meshpeer->peer_llinkid; 2439 /* Standard not clear about what the reaason code should be */ 2440 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2441 ieee80211_send_action(ni, 2442 IEEE80211_ACTION_CAT_SELF_PROT, 2443 IEEE80211_ACTION_MESHPEERING_CLOSE, 2444 args); 2445 break; 2446 case IEEE80211_NODE_MESH_CONFIRMRCV: 2447 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2448 args[0] = ni->ni_mlpid; 2449 args[1] = ni->ni_mllid; 2450 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2451 ieee80211_send_action(ni, 2452 IEEE80211_ACTION_CAT_SELF_PROT, 2453 IEEE80211_ACTION_MESHPEERING_CLOSE, 2454 args); 2455 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2456 mesh_peer_timeout_setup(ni); 2457 } 2458 break; 2459 default: 2460 IEEE80211_DISCARD(vap, 2461 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2462 wh, NULL, "received confirm in invalid state %d", 2463 ni->ni_mlstate); 2464 vap->iv_stats.is_rx_mgtdiscard++; 2465 break; 2466 } 2467 return 0; 2468 } 2469 2470 static int 2471 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2472 const struct ieee80211_frame *wh, 2473 const uint8_t *frm, const uint8_t *efrm) 2474 { 2475 struct ieee80211_meshpeer_ie ie; 2476 const struct ieee80211_meshpeer_ie *meshpeer; 2477 uint16_t args[3]; 2478 2479 /* +2 for action + code */ 2480 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2481 IEEE80211_ACTION_MESHPEERING_CLOSE); 2482 if (meshpeer == NULL) { 2483 return 0; 2484 } 2485 2486 /* 2487 * XXX: check reason code, for example we could receive 2488 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2489 * to peer again. 2490 */ 2491 2492 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2493 ni, "%s", "recv PEER CLOSE"); 2494 2495 switch (ni->ni_mlstate) { 2496 case IEEE80211_NODE_MESH_IDLE: 2497 /* ignore */ 2498 break; 2499 case IEEE80211_NODE_MESH_OPENRCV: 2500 case IEEE80211_NODE_MESH_OPENSNT: 2501 case IEEE80211_NODE_MESH_CONFIRMRCV: 2502 case IEEE80211_NODE_MESH_ESTABLISHED: 2503 args[0] = ni->ni_mlpid; 2504 args[1] = ni->ni_mllid; 2505 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2506 ieee80211_send_action(ni, 2507 IEEE80211_ACTION_CAT_SELF_PROT, 2508 IEEE80211_ACTION_MESHPEERING_CLOSE, 2509 args); 2510 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2511 mesh_peer_timeout_setup(ni); 2512 break; 2513 case IEEE80211_NODE_MESH_HOLDING: 2514 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2515 mesh_peer_timeout_stop(ni); 2516 break; 2517 } 2518 return 0; 2519 } 2520 2521 /* 2522 * Link Metric handling. 2523 */ 2524 static int 2525 mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2526 const struct ieee80211_frame *wh, 2527 const uint8_t *frm, const uint8_t *efrm) 2528 { 2529 const struct ieee80211_meshlmetric_ie *ie = 2530 (const struct ieee80211_meshlmetric_ie *) 2531 (frm+2); /* action + code */ 2532 struct ieee80211_meshlmetric_ie lm_rep; 2533 2534 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2535 lm_rep.lm_flags = 0; 2536 lm_rep.lm_metric = mesh_airtime_calc(ni); 2537 ieee80211_send_action(ni, 2538 IEEE80211_ACTION_CAT_MESH, 2539 IEEE80211_ACTION_MESH_LMETRIC, 2540 &lm_rep); 2541 } 2542 /* XXX: else do nothing for now */ 2543 return 0; 2544 } 2545 2546 /* 2547 * Parse meshgate action ie's for GANN frames. 2548 * Returns -1 if parsing fails, otherwise 0. 2549 */ 2550 static int 2551 mesh_parse_meshgate_action(struct ieee80211_node *ni, 2552 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2553 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2554 { 2555 struct ieee80211vap *vap = ni->ni_vap; 2556 const struct ieee80211_meshgann_ie *gannie; 2557 2558 while (efrm - frm > 1) { 2559 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2560 switch (*frm) { 2561 case IEEE80211_ELEMID_MESHGANN: 2562 gannie = (const struct ieee80211_meshgann_ie *) frm; 2563 memset(ie, 0, sizeof(*ie)); 2564 ie->gann_ie = gannie->gann_ie; 2565 ie->gann_len = gannie->gann_len; 2566 ie->gann_flags = gannie->gann_flags; 2567 ie->gann_hopcount = gannie->gann_hopcount; 2568 ie->gann_ttl = gannie->gann_ttl; 2569 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2570 ie->gann_seq = LE_READ_4(&gannie->gann_seq); 2571 ie->gann_interval = LE_READ_2(&gannie->gann_interval); 2572 break; 2573 } 2574 frm += frm[1] + 2; 2575 } 2576 2577 return 0; 2578 } 2579 2580 /* 2581 * Mesh Gate Announcement handling. 2582 */ 2583 static int 2584 mesh_recv_action_meshgate(struct ieee80211_node *ni, 2585 const struct ieee80211_frame *wh, 2586 const uint8_t *frm, const uint8_t *efrm) 2587 { 2588 struct ieee80211vap *vap = ni->ni_vap; 2589 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2590 struct ieee80211_mesh_gate_route *gr, *next; 2591 struct ieee80211_mesh_route *rt_gate; 2592 struct ieee80211_meshgann_ie pgann; 2593 struct ieee80211_meshgann_ie ie; 2594 int found = 0; 2595 2596 /* +2 for action + code */ 2597 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2598 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2599 ni->ni_macaddr, NULL, "%s", 2600 "GANN parsing failed"); 2601 vap->iv_stats.is_rx_mgtdiscard++; 2602 return (0); 2603 } 2604 2605 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2606 return 0; 2607 2608 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2609 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2610 ie.gann_seq); 2611 2612 if (ms == NULL) 2613 return (0); 2614 MESH_RT_LOCK(ms); 2615 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2616 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2617 continue; 2618 if (ie.gann_seq <= gr->gr_lastseq) { 2619 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2620 ni->ni_macaddr, NULL, 2621 "GANN old seqno %u <= %u", 2622 ie.gann_seq, gr->gr_lastseq); 2623 MESH_RT_UNLOCK(ms); 2624 return (0); 2625 } 2626 /* corresponding mesh gate found & GANN accepted */ 2627 found = 1; 2628 break; 2629 2630 } 2631 if (found == 0) { 2632 /* this GANN is from a new mesh Gate add it to known table. */ 2633 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2634 "stored new GANN information, seq %u.", ie.gann_seq); 2635 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2636 M_80211_MESH_GT_RT, 2637 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2638 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2639 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2640 } 2641 gr->gr_lastseq = ie.gann_seq; 2642 2643 /* check if we have a path to this gate */ 2644 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2645 if (rt_gate != NULL && 2646 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2647 gr->gr_route = rt_gate; 2648 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2649 } 2650 2651 MESH_RT_UNLOCK(ms); 2652 2653 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2654 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2655 return 0; 2656 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2657 pgann.gann_hopcount = ie.gann_hopcount + 1; 2658 pgann.gann_ttl = ie.gann_ttl - 1; 2659 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2660 pgann.gann_seq = ie.gann_seq; 2661 pgann.gann_interval = ie.gann_interval; 2662 2663 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2664 "%s", "propagate GANN"); 2665 2666 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2667 IEEE80211_ACTION_MESH_GANN, &pgann); 2668 2669 return 0; 2670 } 2671 2672 static int 2673 mesh_send_action(struct ieee80211_node *ni, 2674 const uint8_t sa[IEEE80211_ADDR_LEN], 2675 const uint8_t da[IEEE80211_ADDR_LEN], 2676 struct mbuf *m) 2677 { 2678 struct ieee80211vap *vap = ni->ni_vap; 2679 struct ieee80211com *ic = ni->ni_ic; 2680 struct ieee80211_bpf_params params; 2681 struct ieee80211_frame *wh; 2682 int ret; 2683 2684 KASSERT(ni != NULL, ("null node")); 2685 2686 if (vap->iv_state == IEEE80211_S_CAC) { 2687 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2688 "block %s frame in CAC state", "Mesh action"); 2689 vap->iv_stats.is_tx_badstate++; 2690 ieee80211_free_node(ni); 2691 m_freem(m); 2692 return EIO; /* XXX */ 2693 } 2694 2695 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2696 if (m == NULL) { 2697 ieee80211_free_node(ni); 2698 return ENOMEM; 2699 } 2700 2701 IEEE80211_TX_LOCK(ic); 2702 wh = mtod(m, struct ieee80211_frame *); 2703 ieee80211_send_setup(ni, m, 2704 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2705 IEEE80211_NONQOS_TID, sa, da, sa); 2706 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2707 2708 memset(¶ms, 0, sizeof(params)); 2709 params.ibp_pri = WME_AC_VO; 2710 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2711 if (IEEE80211_IS_MULTICAST(da)) 2712 params.ibp_try0 = 1; 2713 else 2714 params.ibp_try0 = ni->ni_txparms->maxretry; 2715 params.ibp_power = ni->ni_txpower; 2716 2717 IEEE80211_NODE_STAT(ni, tx_mgmt); 2718 2719 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2720 IEEE80211_TX_UNLOCK(ic); 2721 return (ret); 2722 } 2723 2724 #define ADDSHORT(frm, v) do { \ 2725 frm[0] = (v) & 0xff; \ 2726 frm[1] = (v) >> 8; \ 2727 frm += 2; \ 2728 } while (0) 2729 #define ADDWORD(frm, v) do { \ 2730 frm[0] = (v) & 0xff; \ 2731 frm[1] = ((v) >> 8) & 0xff; \ 2732 frm[2] = ((v) >> 16) & 0xff; \ 2733 frm[3] = ((v) >> 24) & 0xff; \ 2734 frm += 4; \ 2735 } while (0) 2736 2737 static int 2738 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2739 int category, int action, void *args0) 2740 { 2741 struct ieee80211vap *vap = ni->ni_vap; 2742 struct ieee80211com *ic = ni->ni_ic; 2743 uint16_t *args = args0; 2744 const struct ieee80211_rateset *rs; 2745 struct mbuf *m; 2746 uint8_t *frm; 2747 2748 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2749 "send PEER OPEN action: localid 0x%x", args[0]); 2750 2751 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2752 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2753 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2754 ieee80211_ref_node(ni); 2755 2756 m = ieee80211_getmgtframe(&frm, 2757 ic->ic_headroom + sizeof(struct ieee80211_frame), 2758 sizeof(uint16_t) /* action+category */ 2759 + sizeof(uint16_t) /* capabilites */ 2760 + 2 + IEEE80211_RATE_SIZE 2761 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2762 + 2 + IEEE80211_MESHID_LEN 2763 + sizeof(struct ieee80211_meshconf_ie) 2764 + sizeof(struct ieee80211_meshpeer_ie) 2765 ); 2766 if (m != NULL) { 2767 /* 2768 * mesh peer open action frame format: 2769 * [1] category 2770 * [1] action 2771 * [2] capabilities 2772 * [tlv] rates 2773 * [tlv] xrates 2774 * [tlv] mesh id 2775 * [tlv] mesh conf 2776 * [tlv] mesh peer link mgmt 2777 */ 2778 *frm++ = category; 2779 *frm++ = action; 2780 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2781 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2782 frm = ieee80211_add_rates(frm, rs); 2783 frm = ieee80211_add_xrates(frm, rs); 2784 frm = ieee80211_add_meshid(frm, vap); 2785 frm = ieee80211_add_meshconf(frm, vap); 2786 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2787 args[0], 0, 0); 2788 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2789 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2790 } else { 2791 vap->iv_stats.is_tx_nobuf++; 2792 ieee80211_free_node(ni); 2793 return ENOMEM; 2794 } 2795 } 2796 2797 static int 2798 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2799 int category, int action, void *args0) 2800 { 2801 struct ieee80211vap *vap = ni->ni_vap; 2802 struct ieee80211com *ic = ni->ni_ic; 2803 uint16_t *args = args0; 2804 const struct ieee80211_rateset *rs; 2805 struct mbuf *m; 2806 uint8_t *frm; 2807 2808 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2809 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2810 args[0], args[1]); 2811 2812 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2813 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2814 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2815 ieee80211_ref_node(ni); 2816 2817 m = ieee80211_getmgtframe(&frm, 2818 ic->ic_headroom + sizeof(struct ieee80211_frame), 2819 sizeof(uint16_t) /* action+category */ 2820 + sizeof(uint16_t) /* capabilites */ 2821 + sizeof(uint16_t) /* status code */ 2822 + sizeof(uint16_t) /* AID */ 2823 + 2 + IEEE80211_RATE_SIZE 2824 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2825 + 2 + IEEE80211_MESHID_LEN 2826 + sizeof(struct ieee80211_meshconf_ie) 2827 + sizeof(struct ieee80211_meshpeer_ie) 2828 ); 2829 if (m != NULL) { 2830 /* 2831 * mesh peer confirm action frame format: 2832 * [1] category 2833 * [1] action 2834 * [2] capabilities 2835 * [2] status code 2836 * [2] association id (peer ID) 2837 * [tlv] rates 2838 * [tlv] xrates 2839 * [tlv] mesh id 2840 * [tlv] mesh conf 2841 * [tlv] mesh peer link mgmt 2842 */ 2843 *frm++ = category; 2844 *frm++ = action; 2845 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2846 ADDSHORT(frm, 0); /* status code */ 2847 ADDSHORT(frm, args[1]); /* AID */ 2848 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2849 frm = ieee80211_add_rates(frm, rs); 2850 frm = ieee80211_add_xrates(frm, rs); 2851 frm = ieee80211_add_meshid(frm, vap); 2852 frm = ieee80211_add_meshconf(frm, vap); 2853 frm = ieee80211_add_meshpeer(frm, 2854 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2855 args[0], args[1], 0); 2856 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2857 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2858 } else { 2859 vap->iv_stats.is_tx_nobuf++; 2860 ieee80211_free_node(ni); 2861 return ENOMEM; 2862 } 2863 } 2864 2865 static int 2866 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2867 int category, int action, void *args0) 2868 { 2869 struct ieee80211vap *vap = ni->ni_vap; 2870 struct ieee80211com *ic = ni->ni_ic; 2871 uint16_t *args = args0; 2872 struct mbuf *m; 2873 uint8_t *frm; 2874 2875 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2876 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2877 args[0], args[1], args[2]); 2878 2879 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2880 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2881 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2882 ieee80211_ref_node(ni); 2883 2884 m = ieee80211_getmgtframe(&frm, 2885 ic->ic_headroom + sizeof(struct ieee80211_frame), 2886 sizeof(uint16_t) /* action+category */ 2887 + sizeof(uint16_t) /* reason code */ 2888 + 2 + IEEE80211_MESHID_LEN 2889 + sizeof(struct ieee80211_meshpeer_ie) 2890 ); 2891 if (m != NULL) { 2892 /* 2893 * mesh peer close action frame format: 2894 * [1] category 2895 * [1] action 2896 * [tlv] mesh id 2897 * [tlv] mesh peer link mgmt 2898 */ 2899 *frm++ = category; 2900 *frm++ = action; 2901 frm = ieee80211_add_meshid(frm, vap); 2902 frm = ieee80211_add_meshpeer(frm, 2903 IEEE80211_ACTION_MESHPEERING_CLOSE, 2904 args[0], args[1], args[2]); 2905 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2906 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2907 } else { 2908 vap->iv_stats.is_tx_nobuf++; 2909 ieee80211_free_node(ni); 2910 return ENOMEM; 2911 } 2912 } 2913 2914 static int 2915 mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2916 int category, int action, void *arg0) 2917 { 2918 struct ieee80211vap *vap = ni->ni_vap; 2919 struct ieee80211com *ic = ni->ni_ic; 2920 struct ieee80211_meshlmetric_ie *ie = arg0; 2921 struct mbuf *m; 2922 uint8_t *frm; 2923 2924 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2925 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2926 ni, "%s", "send LINK METRIC REQUEST action"); 2927 } else { 2928 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2929 ni, "send LINK METRIC REPLY action: metric 0x%x", 2930 ie->lm_metric); 2931 } 2932 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2933 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2934 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2935 ieee80211_ref_node(ni); 2936 2937 m = ieee80211_getmgtframe(&frm, 2938 ic->ic_headroom + sizeof(struct ieee80211_frame), 2939 sizeof(uint16_t) + /* action+category */ 2940 sizeof(struct ieee80211_meshlmetric_ie) 2941 ); 2942 if (m != NULL) { 2943 /* 2944 * mesh link metric 2945 * [1] category 2946 * [1] action 2947 * [tlv] mesh link metric 2948 */ 2949 *frm++ = category; 2950 *frm++ = action; 2951 frm = ieee80211_add_meshlmetric(frm, 2952 ie->lm_flags, ie->lm_metric); 2953 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2954 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2955 } else { 2956 vap->iv_stats.is_tx_nobuf++; 2957 ieee80211_free_node(ni); 2958 return ENOMEM; 2959 } 2960 } 2961 2962 static int 2963 mesh_send_action_meshgate(struct ieee80211_node *ni, 2964 int category, int action, void *arg0) 2965 { 2966 struct ieee80211vap *vap = ni->ni_vap; 2967 struct ieee80211com *ic = ni->ni_ic; 2968 struct ieee80211_meshgann_ie *ie = arg0; 2969 struct mbuf *m; 2970 uint8_t *frm; 2971 2972 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2973 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2974 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2975 ieee80211_ref_node(ni); 2976 2977 m = ieee80211_getmgtframe(&frm, 2978 ic->ic_headroom + sizeof(struct ieee80211_frame), 2979 sizeof(uint16_t) + /* action+category */ 2980 IEEE80211_MESHGANN_BASE_SZ 2981 ); 2982 if (m != NULL) { 2983 /* 2984 * mesh link metric 2985 * [1] category 2986 * [1] action 2987 * [tlv] mesh gate annoucement 2988 */ 2989 *frm++ = category; 2990 *frm++ = action; 2991 frm = ieee80211_add_meshgate(frm, ie); 2992 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2993 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 2994 } else { 2995 vap->iv_stats.is_tx_nobuf++; 2996 ieee80211_free_node(ni); 2997 return ENOMEM; 2998 } 2999 } 3000 3001 static void 3002 mesh_peer_timeout_setup(struct ieee80211_node *ni) 3003 { 3004 switch (ni->ni_mlstate) { 3005 case IEEE80211_NODE_MESH_HOLDING: 3006 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 3007 break; 3008 case IEEE80211_NODE_MESH_CONFIRMRCV: 3009 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 3010 break; 3011 case IEEE80211_NODE_MESH_IDLE: 3012 ni->ni_mltval = 0; 3013 break; 3014 default: 3015 ni->ni_mltval = ieee80211_mesh_retrytimeout; 3016 break; 3017 } 3018 if (ni->ni_mltval) 3019 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 3020 mesh_peer_timeout_cb, ni); 3021 } 3022 3023 /* 3024 * Same as above but backoffs timer statisically 50%. 3025 */ 3026 static void 3027 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3028 { 3029 uint32_t r; 3030 3031 r = arc4random(); 3032 ni->ni_mltval += r % ni->ni_mltval; 3033 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3034 ni); 3035 } 3036 3037 static __inline void 3038 mesh_peer_timeout_stop(struct ieee80211_node *ni) 3039 { 3040 callout_drain(&ni->ni_mltimer); 3041 } 3042 3043 static void 3044 mesh_peer_backoff_cb(void *arg) 3045 { 3046 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3047 3048 /* After backoff timeout, try to peer automatically again. */ 3049 ni->ni_mlhcnt = 0; 3050 } 3051 3052 /* 3053 * Mesh Peer Link Management FSM timeout handling. 3054 */ 3055 static void 3056 mesh_peer_timeout_cb(void *arg) 3057 { 3058 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3059 uint16_t args[3]; 3060 3061 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3062 ni, "mesh link timeout, state %d, retry counter %d", 3063 ni->ni_mlstate, ni->ni_mlrcnt); 3064 3065 switch (ni->ni_mlstate) { 3066 case IEEE80211_NODE_MESH_IDLE: 3067 case IEEE80211_NODE_MESH_ESTABLISHED: 3068 break; 3069 case IEEE80211_NODE_MESH_OPENSNT: 3070 case IEEE80211_NODE_MESH_OPENRCV: 3071 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3072 args[0] = ni->ni_mlpid; 3073 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3074 ieee80211_send_action(ni, 3075 IEEE80211_ACTION_CAT_SELF_PROT, 3076 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3077 ni->ni_mlrcnt = 0; 3078 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3079 mesh_peer_timeout_setup(ni); 3080 } else { 3081 args[0] = ni->ni_mlpid; 3082 ieee80211_send_action(ni, 3083 IEEE80211_ACTION_CAT_SELF_PROT, 3084 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3085 ni->ni_mlrcnt++; 3086 mesh_peer_timeout_backoff(ni); 3087 } 3088 break; 3089 case IEEE80211_NODE_MESH_CONFIRMRCV: 3090 args[0] = ni->ni_mlpid; 3091 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3092 ieee80211_send_action(ni, 3093 IEEE80211_ACTION_CAT_SELF_PROT, 3094 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3095 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3096 mesh_peer_timeout_setup(ni); 3097 break; 3098 case IEEE80211_NODE_MESH_HOLDING: 3099 ni->ni_mlhcnt++; 3100 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3101 callout_reset(&ni->ni_mlhtimer, 3102 ieee80211_mesh_backofftimeout, 3103 mesh_peer_backoff_cb, ni); 3104 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3105 break; 3106 } 3107 } 3108 3109 static int 3110 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3111 { 3112 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3113 3114 if (ie == NULL || ie[1] != ms->ms_idlen) 3115 return 1; 3116 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3117 } 3118 3119 /* 3120 * Check if we are using the same algorithms for this mesh. 3121 */ 3122 static int 3123 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3124 { 3125 const struct ieee80211_meshconf_ie *meshconf = 3126 (const struct ieee80211_meshconf_ie *) ie; 3127 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3128 3129 if (meshconf == NULL) 3130 return 1; 3131 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3132 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3133 "unknown path selection algorithm: 0x%x\n", 3134 meshconf->conf_pselid); 3135 return 1; 3136 } 3137 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3138 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3139 "unknown path metric algorithm: 0x%x\n", 3140 meshconf->conf_pmetid); 3141 return 1; 3142 } 3143 if (meshconf->conf_ccid != 0) { 3144 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3145 "unknown congestion control algorithm: 0x%x\n", 3146 meshconf->conf_ccid); 3147 return 1; 3148 } 3149 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3150 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3151 "unknown sync algorithm: 0x%x\n", 3152 meshconf->conf_syncid); 3153 return 1; 3154 } 3155 if (meshconf->conf_authid != 0) { 3156 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3157 "unknown auth auth algorithm: 0x%x\n", 3158 meshconf->conf_pselid); 3159 return 1; 3160 } 3161 /* Not accepting peers */ 3162 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3163 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3164 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3165 return 1; 3166 } 3167 return 0; 3168 } 3169 3170 static int 3171 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3172 const uint8_t *ie) 3173 { 3174 const struct ieee80211_meshpeer_ie *meshpeer = 3175 (const struct ieee80211_meshpeer_ie *) ie; 3176 3177 if (meshpeer == NULL || 3178 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3179 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3180 return 1; 3181 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3182 IEEE80211_DPRINTF(vap, 3183 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3184 "Only MPM protocol is supported (proto: 0x%02X)", 3185 meshpeer->peer_proto); 3186 return 1; 3187 } 3188 switch (subtype) { 3189 case IEEE80211_ACTION_MESHPEERING_OPEN: 3190 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3191 return 1; 3192 break; 3193 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3194 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3195 return 1; 3196 break; 3197 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3198 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3199 return 1; 3200 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3201 meshpeer->peer_linkid != 0) 3202 return 1; 3203 if (meshpeer->peer_rcode == 0) 3204 return 1; 3205 break; 3206 } 3207 return 0; 3208 } 3209 3210 /* 3211 * Add a Mesh ID IE to a frame. 3212 */ 3213 uint8_t * 3214 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3215 { 3216 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3217 3218 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3219 3220 *frm++ = IEEE80211_ELEMID_MESHID; 3221 *frm++ = ms->ms_idlen; 3222 memcpy(frm, ms->ms_id, ms->ms_idlen); 3223 return frm + ms->ms_idlen; 3224 } 3225 3226 /* 3227 * Add a Mesh Configuration IE to a frame. 3228 * For now just use HWMP routing, Airtime link metric, Null Congestion 3229 * Signaling, Null Sync Protocol and Null Authentication. 3230 */ 3231 uint8_t * 3232 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3233 { 3234 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3235 uint16_t caps; 3236 3237 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3238 3239 *frm++ = IEEE80211_ELEMID_MESHCONF; 3240 *frm++ = IEEE80211_MESH_CONF_SZ; 3241 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3242 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3243 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3244 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3245 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3246 /* NB: set the number of neighbors before the rest */ 3247 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3248 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3249 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3250 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3251 frm += 1; 3252 caps = 0; 3253 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3254 caps |= IEEE80211_MESHCONF_CAP_AP; 3255 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3256 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3257 *frm++ = caps; 3258 return frm; 3259 } 3260 3261 /* 3262 * Add a Mesh Peer Management IE to a frame. 3263 */ 3264 uint8_t * 3265 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3266 uint16_t peerid, uint16_t reason) 3267 { 3268 3269 KASSERT(localid != 0, ("localid == 0")); 3270 3271 *frm++ = IEEE80211_ELEMID_MESHPEER; 3272 switch (subtype) { 3273 case IEEE80211_ACTION_MESHPEERING_OPEN: 3274 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3275 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3276 ADDSHORT(frm, localid); /* local ID */ 3277 break; 3278 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3279 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3280 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3281 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3282 ADDSHORT(frm, localid); /* local ID */ 3283 ADDSHORT(frm, peerid); /* peer ID */ 3284 break; 3285 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3286 if (peerid) 3287 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3288 else 3289 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3290 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3291 ADDSHORT(frm, localid); /* local ID */ 3292 if (peerid) 3293 ADDSHORT(frm, peerid); /* peer ID */ 3294 ADDSHORT(frm, reason); 3295 break; 3296 } 3297 return frm; 3298 } 3299 3300 /* 3301 * Compute an Airtime Link Metric for the link with this node. 3302 * 3303 * Based on Draft 3.0 spec (11B.10, p.149). 3304 */ 3305 /* 3306 * Max 802.11s overhead. 3307 */ 3308 #define IEEE80211_MESH_MAXOVERHEAD \ 3309 (sizeof(struct ieee80211_qosframe_addr4) \ 3310 + sizeof(struct ieee80211_meshcntl_ae10) \ 3311 + sizeof(struct llc) \ 3312 + IEEE80211_ADDR_LEN \ 3313 + IEEE80211_WEP_IVLEN \ 3314 + IEEE80211_WEP_KIDLEN \ 3315 + IEEE80211_WEP_CRCLEN \ 3316 + IEEE80211_WEP_MICLEN \ 3317 + IEEE80211_CRC_LEN) 3318 uint32_t 3319 mesh_airtime_calc(struct ieee80211_node *ni) 3320 { 3321 #define M_BITS 8 3322 #define S_FACTOR (2 * M_BITS) 3323 struct ieee80211com *ic = ni->ni_ic; 3324 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3325 const static int nbits = 8192 << M_BITS; 3326 uint32_t overhead, rate, errrate; 3327 uint64_t res; 3328 3329 /* Time to transmit a frame */ 3330 rate = ni->ni_txrate; 3331 overhead = ieee80211_compute_duration(ic->ic_rt, 3332 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3333 /* Error rate in percentage */ 3334 /* XXX assuming small failures are ok */ 3335 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + 3336 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) 3337 / 100; 3338 res = (overhead + (nbits / rate)) * 3339 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3340 3341 return (uint32_t)(res >> S_FACTOR); 3342 #undef M_BITS 3343 #undef S_FACTOR 3344 } 3345 3346 /* 3347 * Add a Mesh Link Metric report IE to a frame. 3348 */ 3349 uint8_t * 3350 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3351 { 3352 *frm++ = IEEE80211_ELEMID_MESHLINK; 3353 *frm++ = 5; 3354 *frm++ = flags; 3355 ADDWORD(frm, metric); 3356 return frm; 3357 } 3358 3359 /* 3360 * Add a Mesh Gate Announcement IE to a frame. 3361 */ 3362 uint8_t * 3363 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3364 { 3365 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3366 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3367 *frm++ = ie->gann_flags; 3368 *frm++ = ie->gann_hopcount; 3369 *frm++ = ie->gann_ttl; 3370 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3371 frm += 6; 3372 ADDWORD(frm, ie->gann_seq); 3373 ADDSHORT(frm, ie->gann_interval); 3374 return frm; 3375 } 3376 #undef ADDSHORT 3377 #undef ADDWORD 3378 3379 /* 3380 * Initialize any mesh-specific node state. 3381 */ 3382 void 3383 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3384 { 3385 ni->ni_flags |= IEEE80211_NODE_QOS; 3386 callout_init(&ni->ni_mltimer, 1); 3387 callout_init(&ni->ni_mlhtimer, 1); 3388 } 3389 3390 /* 3391 * Cleanup any mesh-specific node state. 3392 */ 3393 void 3394 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3395 { 3396 struct ieee80211vap *vap = ni->ni_vap; 3397 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3398 3399 callout_drain(&ni->ni_mltimer); 3400 callout_drain(&ni->ni_mlhtimer); 3401 /* NB: short-circuit callbacks after mesh_vdetach */ 3402 if (vap->iv_mesh != NULL) 3403 ms->ms_ppath->mpp_peerdown(ni); 3404 } 3405 3406 void 3407 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3408 { 3409 ni->ni_meshidlen = ie[1]; 3410 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3411 } 3412 3413 /* 3414 * Setup mesh-specific node state on neighbor discovery. 3415 */ 3416 void 3417 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3418 const struct ieee80211_frame *wh, 3419 const struct ieee80211_scanparams *sp) 3420 { 3421 ieee80211_parse_meshid(ni, sp->meshid); 3422 } 3423 3424 void 3425 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3426 struct ieee80211_beacon_offsets *bo) 3427 { 3428 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3429 3430 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3431 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3432 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3433 } 3434 } 3435 3436 static int 3437 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3438 { 3439 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3440 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3441 struct ieee80211_mesh_route *rt; 3442 struct ieee80211req_mesh_route *imr; 3443 size_t len, off; 3444 uint8_t *p; 3445 int error; 3446 3447 if (vap->iv_opmode != IEEE80211_M_MBSS) 3448 return ENOSYS; 3449 3450 error = 0; 3451 switch (ireq->i_type) { 3452 case IEEE80211_IOC_MESH_ID: 3453 ireq->i_len = ms->ms_idlen; 3454 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3455 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3456 break; 3457 case IEEE80211_IOC_MESH_AP: 3458 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3459 break; 3460 case IEEE80211_IOC_MESH_FWRD: 3461 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3462 break; 3463 case IEEE80211_IOC_MESH_GATE: 3464 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3465 break; 3466 case IEEE80211_IOC_MESH_TTL: 3467 ireq->i_val = ms->ms_ttl; 3468 break; 3469 case IEEE80211_IOC_MESH_RTCMD: 3470 switch (ireq->i_val) { 3471 case IEEE80211_MESH_RTCMD_LIST: 3472 len = 0; 3473 MESH_RT_LOCK(ms); 3474 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3475 len += sizeof(*imr); 3476 } 3477 MESH_RT_UNLOCK(ms); 3478 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3479 ireq->i_len = len; 3480 return ENOMEM; 3481 } 3482 ireq->i_len = len; 3483 /* XXX M_WAIT? */ 3484 p = IEEE80211_MALLOC(len, M_TEMP, 3485 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 3486 if (p == NULL) 3487 return ENOMEM; 3488 off = 0; 3489 MESH_RT_LOCK(ms); 3490 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3491 if (off >= len) 3492 break; 3493 imr = (struct ieee80211req_mesh_route *) 3494 (p + off); 3495 IEEE80211_ADDR_COPY(imr->imr_dest, 3496 rt->rt_dest); 3497 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3498 rt->rt_nexthop); 3499 imr->imr_metric = rt->rt_metric; 3500 imr->imr_nhops = rt->rt_nhops; 3501 imr->imr_lifetime = 3502 ieee80211_mesh_rt_update(rt, 0); 3503 imr->imr_lastmseq = rt->rt_lastmseq; 3504 imr->imr_flags = rt->rt_flags; /* last */ 3505 off += sizeof(*imr); 3506 } 3507 MESH_RT_UNLOCK(ms); 3508 error = copyout(p, (uint8_t *)ireq->i_data, 3509 ireq->i_len); 3510 IEEE80211_FREE(p, M_TEMP); 3511 break; 3512 case IEEE80211_MESH_RTCMD_FLUSH: 3513 case IEEE80211_MESH_RTCMD_ADD: 3514 case IEEE80211_MESH_RTCMD_DELETE: 3515 return EINVAL; 3516 default: 3517 return ENOSYS; 3518 } 3519 break; 3520 case IEEE80211_IOC_MESH_PR_METRIC: 3521 len = strlen(ms->ms_pmetric->mpm_descr); 3522 if (ireq->i_len < len) 3523 return EINVAL; 3524 ireq->i_len = len; 3525 error = copyout(ms->ms_pmetric->mpm_descr, 3526 (uint8_t *)ireq->i_data, len); 3527 break; 3528 case IEEE80211_IOC_MESH_PR_PATH: 3529 len = strlen(ms->ms_ppath->mpp_descr); 3530 if (ireq->i_len < len) 3531 return EINVAL; 3532 ireq->i_len = len; 3533 error = copyout(ms->ms_ppath->mpp_descr, 3534 (uint8_t *)ireq->i_data, len); 3535 break; 3536 default: 3537 return ENOSYS; 3538 } 3539 3540 return error; 3541 } 3542 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3543 3544 static int 3545 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3546 { 3547 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3548 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3549 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3550 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3551 int error; 3552 3553 if (vap->iv_opmode != IEEE80211_M_MBSS) 3554 return ENOSYS; 3555 3556 error = 0; 3557 switch (ireq->i_type) { 3558 case IEEE80211_IOC_MESH_ID: 3559 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3560 return EINVAL; 3561 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3562 if (error != 0) 3563 break; 3564 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3565 ms->ms_idlen = ireq->i_len; 3566 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3567 error = ENETRESET; 3568 break; 3569 case IEEE80211_IOC_MESH_AP: 3570 if (ireq->i_val) 3571 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3572 else 3573 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3574 error = ENETRESET; 3575 break; 3576 case IEEE80211_IOC_MESH_FWRD: 3577 if (ireq->i_val) 3578 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3579 else 3580 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3581 mesh_gatemode_setup(vap); 3582 break; 3583 case IEEE80211_IOC_MESH_GATE: 3584 if (ireq->i_val) 3585 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3586 else 3587 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3588 break; 3589 case IEEE80211_IOC_MESH_TTL: 3590 ms->ms_ttl = (uint8_t) ireq->i_val; 3591 break; 3592 case IEEE80211_IOC_MESH_RTCMD: 3593 switch (ireq->i_val) { 3594 case IEEE80211_MESH_RTCMD_LIST: 3595 return EINVAL; 3596 case IEEE80211_MESH_RTCMD_FLUSH: 3597 ieee80211_mesh_rt_flush(vap); 3598 break; 3599 case IEEE80211_MESH_RTCMD_ADD: 3600 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3601 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3602 return EINVAL; 3603 error = copyin(ireq->i_data, &tmpaddr, 3604 IEEE80211_ADDR_LEN); 3605 if (error == 0) 3606 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3607 break; 3608 case IEEE80211_MESH_RTCMD_DELETE: 3609 ieee80211_mesh_rt_del(vap, ireq->i_data); 3610 break; 3611 default: 3612 return ENOSYS; 3613 } 3614 break; 3615 case IEEE80211_IOC_MESH_PR_METRIC: 3616 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3617 if (error == 0) { 3618 error = mesh_select_proto_metric(vap, tmpproto); 3619 if (error == 0) 3620 error = ENETRESET; 3621 } 3622 break; 3623 case IEEE80211_IOC_MESH_PR_PATH: 3624 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3625 if (error == 0) { 3626 error = mesh_select_proto_path(vap, tmpproto); 3627 if (error == 0) 3628 error = ENETRESET; 3629 } 3630 break; 3631 default: 3632 return ENOSYS; 3633 } 3634 return error; 3635 } 3636 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3637