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 <netproto/802_11/ieee80211_var.h> 63 #include <netproto/802_11/ieee80211_action.h> 64 #ifdef IEEE80211_SUPPORT_SUPERG 65 #include <netproto/802_11/ieee80211_superg.h> 66 #endif 67 #include <netproto/802_11/ieee80211_input.h> 68 #include <netproto/802_11/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 *, int, int); 89 static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 90 int, int); 91 static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 92 static void mesh_peer_timeout_setup(struct ieee80211_node *); 93 static void mesh_peer_timeout_backoff(struct ieee80211_node *); 94 static void mesh_peer_timeout_cb(void *); 95 static __inline void 96 mesh_peer_timeout_stop(struct ieee80211_node *); 97 static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 98 static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 99 static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 100 const uint8_t *); 101 uint32_t mesh_airtime_calc(struct ieee80211_node *); 102 103 /* 104 * Timeout values come from the specification and are in milliseconds. 105 */ 106 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 107 "IEEE 802.11s parameters"); 108 static int ieee80211_mesh_gateint = -1; 109 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW, 110 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 111 "mesh gate interval (ms)"); 112 static int ieee80211_mesh_retrytimeout = -1; 113 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, 114 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 115 "Retry timeout (msec)"); 116 static int ieee80211_mesh_holdingtimeout = -1; 117 118 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, 119 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 120 "Holding state timeout (msec)"); 121 static int ieee80211_mesh_confirmtimeout = -1; 122 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, 123 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 124 "Confirm state timeout (msec)"); 125 static int ieee80211_mesh_backofftimeout = -1; 126 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW, 127 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 128 "Backoff timeout (msec). This is to throutles peering forever when " 129 "not receiving answer or is rejected by a neighbor"); 130 static int ieee80211_mesh_maxretries = 2; 131 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW, 132 &ieee80211_mesh_maxretries, 0, 133 "Maximum retries during peer link establishment"); 134 static int ieee80211_mesh_maxholding = 2; 135 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW, 136 &ieee80211_mesh_maxholding, 0, 137 "Maximum times we are allowed to transition to HOLDING state before " 138 "backinoff during peer link establishment"); 139 140 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 141 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 142 143 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 144 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 145 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 146 static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 147 static ieee80211_recv_action_func mesh_recv_action_meshgate; 148 149 static ieee80211_send_action_func mesh_send_action_meshpeering_open; 150 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 151 static ieee80211_send_action_func mesh_send_action_meshpeering_close; 152 static ieee80211_send_action_func mesh_send_action_meshlmetric; 153 static ieee80211_send_action_func mesh_send_action_meshgate; 154 155 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 156 .mpm_descr = "AIRTIME", 157 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 158 .mpm_metric = mesh_airtime_calc, 159 }; 160 161 static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 162 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 163 164 #if defined(__DragonFly__) 165 166 #define RT_ENTRY_LOCK(rt) lockmgr(&(rt)->rt_lock, LK_EXCLUSIVE) 167 #define RT_ENTRY_LOCK_ASSERT(rt) KKASSERT(lockstatus(&(rt)->rt_lock, curthread) == LK_EXCLUSIVE) 168 #define RT_ENTRY_UNLOCK(rt) lockmgr(&(rt)->rt_lock, LK_RELEASE) 169 170 #define MESH_RT_LOCK(ms) lockmgr(&(ms)->ms_rt_lock, LK_EXCLUSIVE) 171 #define MESH_RT_LOCK_ASSERT(ms) KKASSERT(lockstatus(&(ms)->ms_rt_lock, curthread) == LK_EXCLUSIVE) 172 #define MESH_RT_UNLOCK(ms) lockmgr(&(ms)->ms_rt_lock, LK_RELEASE) 173 174 #else 175 176 #define RT_ENTRY_LOCK(rt) mtx_lock(&(rt)->rt_lock) 177 #define RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED) 178 #define RT_ENTRY_UNLOCK(rt) mtx_unlock(&(rt)->rt_lock) 179 180 #define MESH_RT_LOCK(ms) mtx_lock(&(ms)->ms_rt_lock) 181 #define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED) 182 #define MESH_RT_UNLOCK(ms) mtx_unlock(&(ms)->ms_rt_lock) 183 184 #endif 185 186 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 187 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 188 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 189 190 /* The longer one of the lifetime should be stored as new lifetime */ 191 #define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 192 193 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 194 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 195 196 /* 197 * Helper functions to manipulate the Mesh routing table. 198 */ 199 200 static struct ieee80211_mesh_route * 201 mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 202 const uint8_t dest[IEEE80211_ADDR_LEN]) 203 { 204 struct ieee80211_mesh_route *rt; 205 206 MESH_RT_LOCK_ASSERT(ms); 207 208 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 209 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 210 return rt; 211 } 212 return NULL; 213 } 214 215 static struct ieee80211_mesh_route * 216 mesh_rt_add_locked(struct ieee80211vap *vap, 217 const uint8_t dest[IEEE80211_ADDR_LEN]) 218 { 219 struct ieee80211_mesh_state *ms = vap->iv_mesh; 220 struct ieee80211_mesh_route *rt; 221 222 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 223 ("%s: adding broadcast to the routing table", __func__)); 224 225 MESH_RT_LOCK_ASSERT(ms); 226 227 rt = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_route)) + 228 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_INTWAIT | M_ZERO); 229 if (rt != NULL) { 230 rt->rt_vap = vap; 231 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 232 rt->rt_priv = (void *)ALIGN(&rt[1]); 233 #if defined(__DragonFly__) 234 lockinit(&rt->rt_lock, "MBSS_RT", 0, 0); 235 #else 236 mtx_init(&rt->rt_lock, "MBSS_RT", "802.11s route entry", MTX_DEF); 237 #endif 238 callout_init_mp(&rt->rt_discovery); 239 rt->rt_updtime = ticks; /* create time */ 240 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 241 } 242 return rt; 243 } 244 245 struct ieee80211_mesh_route * 246 ieee80211_mesh_rt_find(struct ieee80211vap *vap, 247 const uint8_t dest[IEEE80211_ADDR_LEN]) 248 { 249 struct ieee80211_mesh_state *ms = vap->iv_mesh; 250 struct ieee80211_mesh_route *rt; 251 252 MESH_RT_LOCK(ms); 253 rt = mesh_rt_find_locked(ms, dest); 254 MESH_RT_UNLOCK(ms); 255 return rt; 256 } 257 258 struct ieee80211_mesh_route * 259 ieee80211_mesh_rt_add(struct ieee80211vap *vap, 260 const uint8_t dest[IEEE80211_ADDR_LEN]) 261 { 262 struct ieee80211_mesh_state *ms = vap->iv_mesh; 263 struct ieee80211_mesh_route *rt; 264 265 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 266 ("%s: duplicate entry in the routing table", __func__)); 267 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 268 ("%s: adding self to the routing table", __func__)); 269 270 MESH_RT_LOCK(ms); 271 rt = mesh_rt_add_locked(vap, dest); 272 MESH_RT_UNLOCK(ms); 273 return rt; 274 } 275 276 /* 277 * Update the route lifetime and returns the updated lifetime. 278 * If new_lifetime is zero and route is timedout it will be invalidated. 279 * new_lifetime is in msec 280 */ 281 int 282 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 283 { 284 int timesince, now; 285 uint32_t lifetime = 0; 286 287 KASSERT(rt != NULL, ("route is NULL")); 288 289 now = ticks; 290 RT_ENTRY_LOCK(rt); 291 292 /* dont clobber a proxy entry gated by us */ 293 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 294 RT_ENTRY_UNLOCK(rt); 295 return rt->rt_lifetime; 296 } 297 298 timesince = ticks_to_msecs(now - rt->rt_updtime); 299 rt->rt_updtime = now; 300 if (timesince >= rt->rt_lifetime) { 301 if (new_lifetime != 0) { 302 rt->rt_lifetime = new_lifetime; 303 } 304 else { 305 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 306 rt->rt_lifetime = 0; 307 } 308 } else { 309 /* update what is left of lifetime */ 310 rt->rt_lifetime = rt->rt_lifetime - timesince; 311 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 312 new_lifetime, rt->rt_lifetime); 313 } 314 lifetime = rt->rt_lifetime; 315 RT_ENTRY_UNLOCK(rt); 316 317 return lifetime; 318 } 319 320 /* 321 * Add a proxy route (as needed) for the specified destination. 322 */ 323 void 324 ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 325 const uint8_t dest[IEEE80211_ADDR_LEN]) 326 { 327 struct ieee80211_mesh_state *ms = vap->iv_mesh; 328 struct ieee80211_mesh_route *rt; 329 330 MESH_RT_LOCK(ms); 331 rt = mesh_rt_find_locked(ms, dest); 332 if (rt == NULL) { 333 rt = mesh_rt_add_locked(vap, dest); 334 if (rt == NULL) { 335 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 336 "%s", "unable to add proxy entry"); 337 vap->iv_stats.is_mesh_rtaddfailed++; 338 } else { 339 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 340 "%s", "add proxy entry"); 341 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 342 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 343 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 344 | IEEE80211_MESHRT_FLAGS_PROXY; 345 } 346 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 347 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 348 ("no proxy flag for poxy entry")); 349 struct ieee80211com *ic = vap->iv_ic; 350 /* 351 * Fix existing entry created by received frames from 352 * stations that have some memory of dest. We also 353 * flush any frames held on the staging queue; delivering 354 * them is too much trouble right now. 355 */ 356 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 357 "%s", "fix proxy entry"); 358 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 359 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 360 | IEEE80211_MESHRT_FLAGS_PROXY; 361 /* XXX belongs in hwmp */ 362 ieee80211_ageq_drain_node(&ic->ic_stageq, 363 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 364 /* XXX stat? */ 365 } 366 MESH_RT_UNLOCK(ms); 367 } 368 369 static __inline void 370 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 371 { 372 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 373 /* 374 * Grab the lock before destroying it, to be sure no one else 375 * is holding the route. 376 */ 377 RT_ENTRY_LOCK(rt); 378 callout_drain(&rt->rt_discovery); 379 #if defined(__DragonFly__) 380 lockuninit(&rt->rt_lock); 381 #else 382 mtx_destroy(&rt->rt_lock); 383 #endif 384 kfree(rt, M_80211_MESH_RT); 385 } 386 387 void 388 ieee80211_mesh_rt_del(struct ieee80211vap *vap, 389 const uint8_t dest[IEEE80211_ADDR_LEN]) 390 { 391 struct ieee80211_mesh_state *ms = vap->iv_mesh; 392 struct ieee80211_mesh_route *rt, *next; 393 394 MESH_RT_LOCK(ms); 395 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 396 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 397 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 398 ms->ms_ppath->mpp_senderror(vap, dest, rt, 399 IEEE80211_REASON_MESH_PERR_NO_PROXY); 400 } else { 401 ms->ms_ppath->mpp_senderror(vap, dest, rt, 402 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 403 } 404 mesh_rt_del(ms, rt); 405 MESH_RT_UNLOCK(ms); 406 return; 407 } 408 } 409 MESH_RT_UNLOCK(ms); 410 } 411 412 void 413 ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 414 { 415 struct ieee80211_mesh_state *ms = vap->iv_mesh; 416 struct ieee80211_mesh_route *rt, *next; 417 418 if (ms == NULL) 419 return; 420 MESH_RT_LOCK(ms); 421 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 422 mesh_rt_del(ms, rt); 423 MESH_RT_UNLOCK(ms); 424 } 425 426 void 427 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 428 const uint8_t peer[IEEE80211_ADDR_LEN]) 429 { 430 struct ieee80211_mesh_state *ms = vap->iv_mesh; 431 struct ieee80211_mesh_route *rt, *next; 432 433 MESH_RT_LOCK(ms); 434 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 435 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 436 mesh_rt_del(ms, rt); 437 } 438 MESH_RT_UNLOCK(ms); 439 } 440 441 /* 442 * Flush expired routing entries, i.e. those in invalid state for 443 * some time. 444 */ 445 static void 446 mesh_rt_flush_invalid(struct ieee80211vap *vap) 447 { 448 struct ieee80211_mesh_state *ms = vap->iv_mesh; 449 struct ieee80211_mesh_route *rt, *next; 450 451 if (ms == NULL) 452 return; 453 MESH_RT_LOCK(ms); 454 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 455 /* Discover paths will be deleted by their own callout */ 456 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 457 continue; 458 ieee80211_mesh_rt_update(rt, 0); 459 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 460 mesh_rt_del(ms, rt); 461 } 462 MESH_RT_UNLOCK(ms); 463 } 464 465 #define N(a) (sizeof(a) / sizeof(a[0])) 466 int 467 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 468 { 469 int i, firstempty = -1; 470 471 for (i = 0; i < N(mesh_proto_paths); i++) { 472 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 473 IEEE80211_MESH_PROTO_DSZ) == 0) 474 return EEXIST; 475 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 476 firstempty = i; 477 } 478 if (firstempty < 0) 479 return ENOSPC; 480 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 481 mesh_proto_paths[firstempty].mpp_active = 1; 482 return 0; 483 } 484 485 int 486 ieee80211_mesh_register_proto_metric(const struct 487 ieee80211_mesh_proto_metric *mpm) 488 { 489 int i, firstempty = -1; 490 491 for (i = 0; i < N(mesh_proto_metrics); i++) { 492 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 493 IEEE80211_MESH_PROTO_DSZ) == 0) 494 return EEXIST; 495 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 496 firstempty = i; 497 } 498 if (firstempty < 0) 499 return ENOSPC; 500 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 501 mesh_proto_metrics[firstempty].mpm_active = 1; 502 return 0; 503 } 504 505 static int 506 mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 507 { 508 struct ieee80211_mesh_state *ms = vap->iv_mesh; 509 int i; 510 511 for (i = 0; i < N(mesh_proto_paths); i++) { 512 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 513 ms->ms_ppath = &mesh_proto_paths[i]; 514 return 0; 515 } 516 } 517 return ENOENT; 518 } 519 520 static int 521 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 522 { 523 struct ieee80211_mesh_state *ms = vap->iv_mesh; 524 int i; 525 526 for (i = 0; i < N(mesh_proto_metrics); i++) { 527 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 528 ms->ms_pmetric = &mesh_proto_metrics[i]; 529 return 0; 530 } 531 } 532 return ENOENT; 533 } 534 #undef N 535 536 static void 537 mesh_gatemode_setup(struct ieee80211vap *vap) 538 { 539 struct ieee80211_mesh_state *ms = vap->iv_mesh; 540 541 /* 542 * NB: When a mesh gate is running as a ROOT it shall 543 * not send out periodic GANNs but instead mark the 544 * mesh gate flag for the corresponding proactive PREQ 545 * and RANN frames. 546 */ 547 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 548 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 549 callout_drain(&ms->ms_gatetimer); 550 return ; 551 } 552 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 553 mesh_gatemode_cb, vap); 554 } 555 556 static void 557 mesh_gatemode_cb(void *arg) 558 { 559 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 560 struct ieee80211_mesh_state *ms = vap->iv_mesh; 561 struct ieee80211_meshgann_ie gann; 562 563 gann.gann_flags = 0; /* Reserved */ 564 gann.gann_hopcount = 0; 565 gann.gann_ttl = ms->ms_ttl; 566 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 567 gann.gann_seq = ms->ms_gateseq++; 568 gann.gann_interval = ieee80211_mesh_gateint; 569 570 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 571 "send broadcast GANN (seq %u)", gann.gann_seq); 572 573 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 574 IEEE80211_ACTION_MESH_GANN, &gann); 575 mesh_gatemode_setup(vap); 576 } 577 578 static void 579 ieee80211_mesh_init(void) 580 { 581 582 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 583 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 584 585 /* 586 * Setup mesh parameters that depends on the clock frequency. 587 */ 588 ieee80211_mesh_gateint = msecs_to_ticks(10000); 589 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 590 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 591 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 592 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 593 594 /* 595 * Register action frame handlers. 596 */ 597 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 598 IEEE80211_ACTION_MESHPEERING_OPEN, 599 mesh_recv_action_meshpeering_open); 600 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 601 IEEE80211_ACTION_MESHPEERING_CONFIRM, 602 mesh_recv_action_meshpeering_confirm); 603 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 604 IEEE80211_ACTION_MESHPEERING_CLOSE, 605 mesh_recv_action_meshpeering_close); 606 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 607 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 608 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 609 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 610 611 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 612 IEEE80211_ACTION_MESHPEERING_OPEN, 613 mesh_send_action_meshpeering_open); 614 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 615 IEEE80211_ACTION_MESHPEERING_CONFIRM, 616 mesh_send_action_meshpeering_confirm); 617 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 618 IEEE80211_ACTION_MESHPEERING_CLOSE, 619 mesh_send_action_meshpeering_close); 620 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 621 IEEE80211_ACTION_MESH_LMETRIC, 622 mesh_send_action_meshlmetric); 623 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 624 IEEE80211_ACTION_MESH_GANN, 625 mesh_send_action_meshgate); 626 627 /* 628 * Register Airtime Link Metric. 629 */ 630 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 631 632 } 633 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 634 635 void 636 ieee80211_mesh_attach(struct ieee80211com *ic) 637 { 638 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 639 } 640 641 void 642 ieee80211_mesh_detach(struct ieee80211com *ic) 643 { 644 } 645 646 static void 647 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 648 { 649 struct ieee80211com *ic = ni->ni_ic; 650 uint16_t args[3]; 651 652 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 653 args[0] = ni->ni_mlpid; 654 args[1] = ni->ni_mllid; 655 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 656 ieee80211_send_action(ni, 657 IEEE80211_ACTION_CAT_SELF_PROT, 658 IEEE80211_ACTION_MESHPEERING_CLOSE, 659 args); 660 } 661 callout_drain(&ni->ni_mltimer); 662 /* XXX belongs in hwmp */ 663 ieee80211_ageq_drain_node(&ic->ic_stageq, 664 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 665 } 666 667 static void 668 mesh_vdetach(struct ieee80211vap *vap) 669 { 670 struct ieee80211_mesh_state *ms = vap->iv_mesh; 671 672 callout_drain(&ms->ms_cleantimer); 673 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 674 NULL); 675 ieee80211_mesh_rt_flush(vap); 676 #if defined(__DragonFly__) 677 lockuninit(&ms->ms_rt_lock); 678 #else 679 mtx_destroy(&ms->ms_rt_lock); 680 #endif 681 ms->ms_ppath->mpp_vdetach(vap); 682 kfree(vap->iv_mesh, M_80211_VAP); 683 vap->iv_mesh = NULL; 684 } 685 686 static void 687 mesh_vattach(struct ieee80211vap *vap) 688 { 689 struct ieee80211_mesh_state *ms; 690 vap->iv_newstate = mesh_newstate; 691 vap->iv_input = mesh_input; 692 vap->iv_opdetach = mesh_vdetach; 693 vap->iv_recv_mgmt = mesh_recv_mgmt; 694 vap->iv_recv_ctl = mesh_recv_ctl; 695 ms = kmalloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 696 M_INTWAIT | M_ZERO); 697 if (ms == NULL) { 698 kprintf("%s: couldn't alloc MBSS state\n", __func__); 699 return; 700 } 701 vap->iv_mesh = ms; 702 ms->ms_seq = 0; 703 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 704 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 705 TAILQ_INIT(&ms->ms_known_gates); 706 TAILQ_INIT(&ms->ms_routes); 707 #if defined(__DragonFly__) 708 lockinit(&ms->ms_rt_lock, "MBSS", 0, 0); 709 #else 710 mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF); 711 #endif 712 callout_init_mp(&ms->ms_cleantimer); 713 callout_init_mp(&ms->ms_gatetimer); 714 ms->ms_gateseq = 0; 715 mesh_select_proto_metric(vap, "AIRTIME"); 716 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 717 mesh_select_proto_path(vap, "HWMP"); 718 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 719 ms->ms_ppath->mpp_vattach(vap); 720 } 721 722 /* 723 * IEEE80211_M_MBSS vap state machine handler. 724 */ 725 static int 726 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 727 { 728 struct ieee80211_mesh_state *ms = vap->iv_mesh; 729 struct ieee80211com *ic = vap->iv_ic; 730 struct ieee80211_node *ni; 731 enum ieee80211_state ostate; 732 733 IEEE80211_LOCK_ASSERT(ic); 734 735 ostate = vap->iv_state; 736 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 737 __func__, ieee80211_state_name[ostate], 738 ieee80211_state_name[nstate], arg); 739 vap->iv_state = nstate; /* state transition */ 740 if (ostate != IEEE80211_S_SCAN) 741 ieee80211_cancel_scan(vap); /* background scan */ 742 ni = vap->iv_bss; /* NB: no reference held */ 743 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 744 callout_drain(&ms->ms_cleantimer); 745 callout_drain(&ms->ms_gatetimer); 746 } 747 switch (nstate) { 748 case IEEE80211_S_INIT: 749 switch (ostate) { 750 case IEEE80211_S_SCAN: 751 ieee80211_cancel_scan(vap); 752 break; 753 case IEEE80211_S_CAC: 754 ieee80211_dfs_cac_stop(vap); 755 break; 756 case IEEE80211_S_RUN: 757 ieee80211_iterate_nodes(&ic->ic_sta, 758 mesh_vdetach_peers, NULL); 759 break; 760 default: 761 break; 762 } 763 if (ostate != IEEE80211_S_INIT) { 764 /* NB: optimize INIT -> INIT case */ 765 ieee80211_reset_bss(vap); 766 ieee80211_mesh_rt_flush(vap); 767 } 768 break; 769 case IEEE80211_S_SCAN: 770 switch (ostate) { 771 case IEEE80211_S_INIT: 772 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 773 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 774 ms->ms_idlen != 0) { 775 /* 776 * Already have a channel and a mesh ID; bypass 777 * the scan and startup immediately. 778 */ 779 ieee80211_create_ibss(vap, vap->iv_des_chan); 780 break; 781 } 782 /* 783 * Initiate a scan. We can come here as a result 784 * of an IEEE80211_IOC_SCAN_REQ too in which case 785 * the vap will be marked with IEEE80211_FEXT_SCANREQ 786 * and the scan request parameters will be present 787 * in iv_scanreq. Otherwise we do the default. 788 */ 789 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 790 ieee80211_check_scan(vap, 791 vap->iv_scanreq_flags, 792 vap->iv_scanreq_duration, 793 vap->iv_scanreq_mindwell, 794 vap->iv_scanreq_maxdwell, 795 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 796 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 797 } else 798 ieee80211_check_scan_current(vap); 799 break; 800 default: 801 break; 802 } 803 break; 804 case IEEE80211_S_CAC: 805 /* 806 * Start CAC on a DFS channel. We come here when starting 807 * a bss on a DFS channel (see ieee80211_create_ibss). 808 */ 809 ieee80211_dfs_cac_start(vap); 810 break; 811 case IEEE80211_S_RUN: 812 switch (ostate) { 813 case IEEE80211_S_INIT: 814 /* 815 * Already have a channel; bypass the 816 * scan and startup immediately. 817 * Note that ieee80211_create_ibss will call 818 * back to do a RUN->RUN state change. 819 */ 820 ieee80211_create_ibss(vap, 821 ieee80211_ht_adjust_channel(ic, 822 ic->ic_curchan, vap->iv_flags_ht)); 823 /* NB: iv_bss is changed on return */ 824 break; 825 case IEEE80211_S_CAC: 826 /* 827 * NB: This is the normal state change when CAC 828 * expires and no radar was detected; no need to 829 * clear the CAC timer as it's already expired. 830 */ 831 /* fall thru... */ 832 case IEEE80211_S_CSA: 833 #if 0 834 /* 835 * Shorten inactivity timer of associated stations 836 * to weed out sta's that don't follow a CSA. 837 */ 838 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 839 #endif 840 /* 841 * Update bss node channel to reflect where 842 * we landed after CSA. 843 */ 844 ieee80211_node_set_chan(vap->iv_bss, 845 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 846 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 847 /* XXX bypass debug msgs */ 848 break; 849 case IEEE80211_S_SCAN: 850 case IEEE80211_S_RUN: 851 #ifdef IEEE80211_DEBUG 852 if (ieee80211_msg_debug(vap)) { 853 struct ieee80211_node *ni = vap->iv_bss; 854 ieee80211_note(vap, 855 "synchronized with %s meshid ", 856 ether_sprintf(ni->ni_meshid)); 857 ieee80211_print_essid(ni->ni_meshid, 858 ni->ni_meshidlen); 859 /* XXX MCS/HT */ 860 kprintf(" channel %d\n", 861 ieee80211_chan2ieee(ic, ic->ic_curchan)); 862 } 863 #endif 864 break; 865 default: 866 break; 867 } 868 ieee80211_node_authorize(vap->iv_bss); 869 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 870 mesh_rt_cleanup_cb, vap); 871 mesh_gatemode_setup(vap); 872 break; 873 default: 874 break; 875 } 876 /* NB: ostate not nstate */ 877 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 878 return 0; 879 } 880 881 static void 882 mesh_rt_cleanup_cb(void *arg) 883 { 884 struct ieee80211vap *vap = arg; 885 struct ieee80211_mesh_state *ms = vap->iv_mesh; 886 887 mesh_rt_flush_invalid(vap); 888 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 889 mesh_rt_cleanup_cb, vap); 890 } 891 892 /* 893 * Mark a mesh STA as gate and return a pointer to it. 894 * If this is first time, we create a new gate route. 895 * Always update the path route to this mesh gate. 896 */ 897 struct ieee80211_mesh_gate_route * 898 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 899 struct ieee80211_mesh_route *rt) 900 { 901 struct ieee80211_mesh_state *ms = vap->iv_mesh; 902 struct ieee80211_mesh_gate_route *gr = NULL, *next; 903 int found = 0; 904 905 MESH_RT_LOCK(ms); 906 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 907 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 908 found = 1; 909 break; 910 } 911 } 912 913 if (!found) { 914 /* New mesh gate add it to known table. */ 915 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 916 "%s", "stored new gate information from pro-PREQ."); 917 gr = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 918 M_80211_MESH_GT_RT, M_INTWAIT | M_ZERO); 919 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 920 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 921 } 922 gr->gr_route = rt; 923 /* TODO: link from path route to gate route */ 924 MESH_RT_UNLOCK(ms); 925 926 return gr; 927 } 928 929 930 /* 931 * Helper function to note the Mesh Peer Link FSM change. 932 */ 933 static void 934 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 935 { 936 struct ieee80211vap *vap = ni->ni_vap; 937 struct ieee80211_mesh_state *ms = vap->iv_mesh; 938 #ifdef IEEE80211_DEBUG 939 static const char *meshlinkstates[] = { 940 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 941 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 942 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 943 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 944 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 945 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 946 }; 947 #endif 948 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 949 ni, "peer link: %s -> %s", 950 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 951 952 /* track neighbor count */ 953 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 954 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 955 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 956 ms->ms_neighbors++; 957 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 958 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 959 state != IEEE80211_NODE_MESH_ESTABLISHED) { 960 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 961 ms->ms_neighbors--; 962 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 963 } 964 ni->ni_mlstate = state; 965 switch (state) { 966 case IEEE80211_NODE_MESH_HOLDING: 967 ms->ms_ppath->mpp_peerdown(ni); 968 break; 969 case IEEE80211_NODE_MESH_ESTABLISHED: 970 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 971 break; 972 default: 973 break; 974 } 975 } 976 977 /* 978 * Helper function to generate a unique local ID required for mesh 979 * peer establishment. 980 */ 981 static void 982 mesh_checkid(void *arg, struct ieee80211_node *ni) 983 { 984 uint16_t *r = arg; 985 986 if (*r == ni->ni_mllid) 987 *(uint16_t *)arg = 0; 988 } 989 990 static uint32_t 991 mesh_generateid(struct ieee80211vap *vap) 992 { 993 int maxiter = 4; 994 uint16_t r; 995 996 do { 997 get_random_bytes(&r, 2); 998 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 999 maxiter--; 1000 } while (r == 0 && maxiter > 0); 1001 return r; 1002 } 1003 1004 /* 1005 * Verifies if we already received this packet by checking its 1006 * sequence number. 1007 * Returns 0 if the frame is to be accepted, 1 otherwise. 1008 */ 1009 static int 1010 mesh_checkpseq(struct ieee80211vap *vap, 1011 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 1012 { 1013 struct ieee80211_mesh_route *rt; 1014 1015 rt = ieee80211_mesh_rt_find(vap, source); 1016 if (rt == NULL) { 1017 rt = ieee80211_mesh_rt_add(vap, source); 1018 if (rt == NULL) { 1019 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 1020 "%s", "add mcast route failed"); 1021 vap->iv_stats.is_mesh_rtaddfailed++; 1022 return 1; 1023 } 1024 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 1025 "add mcast route, mesh seqno %d", seq); 1026 rt->rt_lastmseq = seq; 1027 return 0; 1028 } 1029 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 1030 return 1; 1031 } else { 1032 rt->rt_lastmseq = seq; 1033 return 0; 1034 } 1035 } 1036 1037 /* 1038 * Iterate the routing table and locate the next hop. 1039 */ 1040 struct ieee80211_node * 1041 ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1042 const uint8_t dest[IEEE80211_ADDR_LEN]) 1043 { 1044 struct ieee80211_mesh_route *rt; 1045 1046 rt = ieee80211_mesh_rt_find(vap, dest); 1047 if (rt == NULL) 1048 return NULL; 1049 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1050 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1051 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1052 /* XXX stat */ 1053 return NULL; 1054 } 1055 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1056 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1057 if (rt == NULL) return NULL; 1058 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1059 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1060 "%s: meshgate !valid, flags 0x%x", __func__, 1061 rt->rt_flags); 1062 /* XXX stat */ 1063 return NULL; 1064 } 1065 } 1066 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1067 } 1068 1069 static void 1070 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1071 struct ieee80211_mesh_route *rt_gate) 1072 { 1073 struct ifnet *ifp = vap->iv_ifp; 1074 struct ieee80211_node *ni; 1075 1076 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1077 1078 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1079 if (ni == NULL) { 1080 IFNET_STAT_INC(ifp, oerrors, 1); 1081 m_freem(m); 1082 return; 1083 } 1084 1085 /* 1086 * Send through the VAP packet transmit path. 1087 * This consumes the node ref grabbed above and 1088 * the mbuf, regardless of whether there's a problem 1089 * or not. 1090 */ 1091 (void) ieee80211_vap_pkt_send_dest(vap, m, ni); 1092 } 1093 1094 /* 1095 * Forward the queued frames to known valid mesh gates. 1096 * Assume destination to be outside the MBSS (i.e. proxy entry), 1097 * If no valid mesh gates are known silently discard queued frames. 1098 * After transmitting frames to all known valid mesh gates, this route 1099 * will be marked invalid, and a new path discovery will happen in the hopes 1100 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1101 */ 1102 void 1103 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1104 struct ieee80211_mesh_route *rt_dest) 1105 { 1106 struct ieee80211com *ic = vap->iv_ic; 1107 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1108 struct ieee80211_mesh_route *rt_gate; 1109 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1110 struct mbuf *m, *mcopy, *next; 1111 1112 IEEE80211_TX_UNLOCK_ASSERT(ic); 1113 1114 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1115 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1116 1117 /* XXX: send to more than one valid mash gate */ 1118 MESH_RT_LOCK(ms); 1119 1120 m = ieee80211_ageq_remove(&ic->ic_stageq, 1121 (struct ieee80211_node *)(uintptr_t) 1122 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1123 1124 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1125 rt_gate = gr->gr_route; 1126 if (rt_gate == NULL) { 1127 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1128 rt_dest->rt_dest, 1129 "mesh gate with no path %s", 1130 ether_sprintf(gr->gr_addr)); 1131 continue; 1132 } 1133 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1134 continue; 1135 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1136 ("route not marked as a mesh gate")); 1137 KASSERT((rt_gate->rt_flags & 1138 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1139 ("found mesh gate that is also marked porxy")); 1140 /* 1141 * convert route to a proxy route gated by the current 1142 * mesh gate, this is needed so encap can built data 1143 * frame with correct address. 1144 */ 1145 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1146 IEEE80211_MESHRT_FLAGS_VALID; 1147 rt_dest->rt_ext_seq = 1; /* random value */ 1148 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1149 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1150 rt_dest->rt_metric = rt_gate->rt_metric; 1151 rt_dest->rt_nhops = rt_gate->rt_nhops; 1152 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1153 MESH_RT_UNLOCK(ms); 1154 /* XXX: lock?? */ 1155 mcopy = m_dup(m, M_NOWAIT); 1156 for (; mcopy != NULL; mcopy = next) { 1157 next = mcopy->m_nextpkt; 1158 mcopy->m_nextpkt = NULL; 1159 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1160 rt_dest->rt_dest, 1161 "flush queued frame %p len %d", mcopy, 1162 mcopy->m_pkthdr.len); 1163 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1164 } 1165 MESH_RT_LOCK(ms); 1166 } 1167 rt_dest->rt_flags = 0; /* Mark invalid */ 1168 m_freem(m); 1169 MESH_RT_UNLOCK(ms); 1170 } 1171 1172 /* 1173 * Forward the specified frame. 1174 * Decrement the TTL and set TA to our MAC address. 1175 */ 1176 static void 1177 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1178 const struct ieee80211_meshcntl *mc) 1179 { 1180 struct ieee80211com *ic = vap->iv_ic; 1181 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1182 struct ifnet *ifp = vap->iv_ifp; 1183 const struct ieee80211_frame *wh = 1184 mtod(m, const struct ieee80211_frame *); 1185 struct mbuf *mcopy; 1186 struct ieee80211_meshcntl *mccopy; 1187 struct ieee80211_frame *whcopy; 1188 struct ieee80211_node *ni; 1189 int err; 1190 1191 /* This is called from the RX path - don't hold this lock */ 1192 IEEE80211_TX_UNLOCK_ASSERT(ic); 1193 1194 /* 1195 * mesh ttl of 1 means we are the last one receving it, 1196 * according to amendment we decrement and then check if 1197 * 0, if so we dont forward. 1198 */ 1199 if (mc->mc_ttl < 1) { 1200 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1201 "%s", "frame not fwd'd, ttl 1"); 1202 vap->iv_stats.is_mesh_fwd_ttl++; 1203 return; 1204 } 1205 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1206 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1207 "%s", "frame not fwd'd, fwding disabled"); 1208 vap->iv_stats.is_mesh_fwd_disabled++; 1209 return; 1210 } 1211 mcopy = m_dup(m, M_NOWAIT); 1212 if (mcopy == NULL) { 1213 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1214 "%s", "frame not fwd'd, cannot dup"); 1215 vap->iv_stats.is_mesh_fwd_nobuf++; 1216 IFNET_STAT_INC(ifp, oerrors, 1); 1217 return; 1218 } 1219 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1220 sizeof(struct ieee80211_meshcntl)); 1221 if (mcopy == NULL) { 1222 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1223 "%s", "frame not fwd'd, too short"); 1224 vap->iv_stats.is_mesh_fwd_tooshort++; 1225 IFNET_STAT_INC(ifp, oerrors, 1); 1226 m_freem(mcopy); 1227 return; 1228 } 1229 whcopy = mtod(mcopy, struct ieee80211_frame *); 1230 mccopy = (struct ieee80211_meshcntl *) 1231 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1232 /* XXX clear other bits? */ 1233 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1234 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1235 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1236 ni = ieee80211_ref_node(vap->iv_bss); 1237 mcopy->m_flags |= M_MCAST; 1238 } else { 1239 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1240 if (ni == NULL) { 1241 /* 1242 * [Optional] any of the following three actions: 1243 * o silently discard 1244 * o trigger a path discovery 1245 * o inform TA that meshDA is unknown. 1246 */ 1247 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1248 "%s", "frame not fwd'd, no path"); 1249 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1250 IEEE80211_REASON_MESH_PERR_NO_FI); 1251 vap->iv_stats.is_mesh_fwd_nopath++; 1252 m_freem(mcopy); 1253 return; 1254 } 1255 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1256 } 1257 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1258 mccopy->mc_ttl--; 1259 1260 /* XXX calculate priority so drivers can find the tx queue */ 1261 M_WME_SETAC(mcopy, WME_AC_BE); 1262 1263 /* XXX do we know m_nextpkt is NULL? */ 1264 mcopy->m_pkthdr.rcvif = (void *) ni; 1265 1266 /* 1267 * XXX this bypasses all of the VAP TX handling; it passes frames 1268 * directly to the parent interface. 1269 * 1270 * Because of this, there's no TX lock being held as there's no 1271 * encaps state being used. 1272 * 1273 * Doing a direct parent transmit may not be the correct thing 1274 * to do here; we'll have to re-think this soon. 1275 */ 1276 IEEE80211_TX_LOCK(ic); 1277 err = ieee80211_parent_xmitpkt(ic, mcopy); 1278 IEEE80211_TX_UNLOCK(ic); 1279 if (err != 0) { 1280 /* NB: IFQ_HANDOFF reclaims mbuf */ 1281 ieee80211_free_node(ni); 1282 } else { 1283 IFNET_STAT_INC(ifp, opackets, 1); 1284 } 1285 } 1286 1287 static struct mbuf * 1288 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1289 { 1290 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1291 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1292 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1293 sizeof(struct ieee80211_meshcntl_ae10)]; 1294 const struct ieee80211_qosframe_addr4 *wh; 1295 const struct ieee80211_meshcntl_ae10 *mc; 1296 struct ether_header *eh; 1297 struct llc *llc; 1298 int ae; 1299 1300 if (m->m_len < hdrlen + sizeof(*llc) && 1301 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1302 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1303 "discard data frame: %s", "m_pullup failed"); 1304 vap->iv_stats.is_rx_tooshort++; 1305 return NULL; 1306 } 1307 memcpy(b, mtod(m, caddr_t), hdrlen); 1308 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1309 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1310 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1311 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1312 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1313 1314 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1315 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1316 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1317 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1318 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1319 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1320 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1321 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1322 llc = NULL; 1323 } else { 1324 m_adj(m, hdrlen - sizeof(*eh)); 1325 } 1326 eh = mtod(m, struct ether_header *); 1327 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1328 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1329 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1330 if (ae == IEEE80211_MESH_AE_00) { 1331 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1332 } else if (ae == IEEE80211_MESH_AE_01) { 1333 IEEE80211_ADDR_COPY(eh->ether_shost, 1334 MC01(mc)->mc_addr4); 1335 } else { 1336 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1337 (const struct ieee80211_frame *)wh, NULL, 1338 "bad AE %d", ae); 1339 vap->iv_stats.is_mesh_badae++; 1340 m_freem(m); 1341 return NULL; 1342 } 1343 } else { 1344 if (ae == IEEE80211_MESH_AE_00) { 1345 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1346 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1347 } else if (ae == IEEE80211_MESH_AE_10) { 1348 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1349 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1350 } else { 1351 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1352 (const struct ieee80211_frame *)wh, NULL, 1353 "bad AE %d", ae); 1354 vap->iv_stats.is_mesh_badae++; 1355 m_freem(m); 1356 return NULL; 1357 } 1358 } 1359 #ifndef __NO_STRICT_ALIGNMENT 1360 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1361 m = ieee80211_realign(vap, m, sizeof(*eh)); 1362 if (m == NULL) 1363 return NULL; 1364 } 1365 #endif /* !__NO_STRICT_ALIGNMENT */ 1366 if (llc != NULL) { 1367 eh = mtod(m, struct ether_header *); 1368 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1369 } 1370 return m; 1371 #undef WDIR 1372 #undef MC01 1373 } 1374 1375 /* 1376 * Return non-zero if the unicast mesh data frame should be processed 1377 * locally. Frames that are not proxy'd have our address, otherwise 1378 * we need to consult the routing table to look for a proxy entry. 1379 */ 1380 static __inline int 1381 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1382 const struct ieee80211_meshcntl *mc) 1383 { 1384 int ae = mc->mc_flags & 3; 1385 1386 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1387 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1388 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1389 ("bad AE %d", ae)); 1390 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1391 const struct ieee80211_meshcntl_ae10 *mc10 = 1392 (const struct ieee80211_meshcntl_ae10 *) mc; 1393 struct ieee80211_mesh_route *rt = 1394 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1395 /* check for proxy route to ourself */ 1396 return (rt != NULL && 1397 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1398 } else /* ucast w/o proxy */ 1399 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1400 } 1401 1402 /* 1403 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1404 * > 0 means we have forwarded data and no need to process locally 1405 * == 0 means we want to process locally (and we may have forwarded data 1406 * < 0 means there was an error and data should be discarded 1407 */ 1408 static int 1409 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1410 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1411 { 1412 struct ieee80211_qosframe_addr4 *qwh; 1413 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1414 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1415 1416 /* This is called from the RX path - don't hold this lock */ 1417 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1418 1419 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1420 1421 /* 1422 * TODO: 1423 * o verify addr2 is a legitimate transmitter 1424 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1425 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1426 */ 1427 1428 /* set lifetime of addr3 (meshDA) to initial value */ 1429 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1430 if (rt_meshda == NULL) { 1431 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1432 "no route to meshDA(%s)", ether_sprintf(qwh->i_addr3)); 1433 /* 1434 * [Optional] any of the following three actions: 1435 * o silently discard [X] 1436 * o trigger a path discovery [ ] 1437 * o inform TA that meshDA is unknown. [ ] 1438 */ 1439 /* XXX: stats */ 1440 return (-1); 1441 } 1442 1443 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1444 ms->ms_ppath->mpp_inact)); 1445 1446 /* set lifetime of addr4 (meshSA) to initial value */ 1447 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1448 KASSERT(rt_meshsa != NULL, ("no route")); 1449 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1450 ms->ms_ppath->mpp_inact)); 1451 1452 mesh_forward(vap, m, mc); 1453 return (1); /* dont process locally */ 1454 } 1455 1456 /* 1457 * Verifies transmitter, updates lifetime, precursor list and process data 1458 * locally, if data is proxy with AE = 10 it could mean data should go 1459 * on another mesh path or data should be forwarded to the DS. 1460 * 1461 * > 0 means we have forwarded data and no need to process locally 1462 * == 0 means we want to process locally (and we may have forwarded data 1463 * < 0 means there was an error and data should be discarded 1464 */ 1465 static int 1466 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1467 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1468 { 1469 struct ieee80211_qosframe_addr4 *qwh; 1470 const struct ieee80211_meshcntl_ae10 *mc10; 1471 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1472 struct ieee80211_mesh_route *rt; 1473 int ae; 1474 1475 /* This is called from the RX path - don't hold this lock */ 1476 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1477 1478 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1479 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1480 1481 /* 1482 * TODO: 1483 * o verify addr2 is a legitimate transmitter 1484 * o lifetime of precursor entry is max(init, curr) 1485 */ 1486 1487 /* set lifetime of addr4 (meshSA) to initial value */ 1488 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1489 KASSERT(rt != NULL, ("no route")); 1490 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1491 rt = NULL; 1492 1493 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1494 KASSERT(ae == IEEE80211_MESH_AE_00 || 1495 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1496 if (ae == IEEE80211_MESH_AE_10) { 1497 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1498 return (0); /* process locally */ 1499 } 1500 1501 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1502 if (rt != NULL && 1503 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1504 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1505 /* 1506 * Forward on another mesh-path, according to 1507 * amendment as specified in 9.32.4.1 1508 */ 1509 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1510 mesh_forward(vap, m, 1511 (const struct ieee80211_meshcntl *)mc10); 1512 return (1); /* dont process locally */ 1513 } 1514 /* 1515 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1516 * addressed according to 13.11.3.2. 1517 */ 1518 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1519 "forward frame to DS, SA(%s) DA(%s)", 1520 ether_sprintf(mc10->mc_addr6), 1521 ether_sprintf(mc10->mc_addr5)); 1522 } 1523 return (0); /* process locally */ 1524 } 1525 1526 /* 1527 * Try to forward the group addressed data on to other mesh STAs, and 1528 * also to the DS. 1529 * 1530 * > 0 means we have forwarded data and no need to process locally 1531 * == 0 means we want to process locally (and we may have forwarded data 1532 * < 0 means there was an error and data should be discarded 1533 */ 1534 static int 1535 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1536 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1537 { 1538 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1539 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1540 1541 /* This is called from the RX path - don't hold this lock */ 1542 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1543 1544 mesh_forward(vap, m, mc); 1545 1546 if(mc->mc_ttl > 0) { 1547 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1548 /* 1549 * Forward of MSDUs from the MBSS to DS group addressed 1550 * (according to 13.11.3.2) 1551 * This happens by delivering the packet, and a bridge 1552 * will sent it on another port member. 1553 */ 1554 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1555 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1556 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1557 MC01(mc)->mc_addr4, "%s", 1558 "forward from MBSS to the DS"); 1559 } 1560 } 1561 return (0); /* process locally */ 1562 #undef MC01 1563 } 1564 1565 static int 1566 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 1567 { 1568 #define HAS_SEQ(type) ((type & 0x4) == 0) 1569 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1570 #define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1571 struct ieee80211vap *vap = ni->ni_vap; 1572 struct ieee80211com *ic = ni->ni_ic; 1573 struct ifnet *ifp = vap->iv_ifp; 1574 struct ieee80211_frame *wh; 1575 const struct ieee80211_meshcntl *mc; 1576 int hdrspace, meshdrlen, need_tap, error; 1577 uint8_t dir, type, subtype, ae; 1578 uint32_t seq; 1579 const uint8_t *addr; 1580 uint8_t qos[2]; 1581 ieee80211_seq rxseq; 1582 1583 KASSERT(ni != NULL, ("null node")); 1584 ni->ni_inact = ni->ni_inact_reload; 1585 1586 need_tap = 1; /* mbuf need to be tapped. */ 1587 type = -1; /* undefined */ 1588 1589 /* This is called from the RX path - don't hold this lock */ 1590 IEEE80211_TX_UNLOCK_ASSERT(ic); 1591 1592 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1593 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1594 ni->ni_macaddr, NULL, 1595 "too short (1): len %u", m->m_pkthdr.len); 1596 vap->iv_stats.is_rx_tooshort++; 1597 goto out; 1598 } 1599 /* 1600 * Bit of a cheat here, we use a pointer for a 3-address 1601 * frame format but don't reference fields past outside 1602 * ieee80211_frame_min w/o first validating the data is 1603 * present. 1604 */ 1605 wh = mtod(m, struct ieee80211_frame *); 1606 1607 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1608 IEEE80211_FC0_VERSION_0) { 1609 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1610 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1611 vap->iv_stats.is_rx_badversion++; 1612 goto err; 1613 } 1614 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1615 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1616 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1617 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1618 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1619 ni->ni_noise = nf; 1620 if (HAS_SEQ(type)) { 1621 uint8_t tid = ieee80211_gettid(wh); 1622 1623 if (IEEE80211_QOS_HAS_SEQ(wh) && 1624 TID_TO_WME_AC(tid) >= WME_AC_VI) 1625 ic->ic_wme.wme_hipri_traffic++; 1626 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1627 if (! ieee80211_check_rxseq(ni, wh)) { 1628 /* duplicate, discard */ 1629 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1630 wh->i_addr1, "duplicate", 1631 "seqno <%u,%u> fragno <%u,%u> tid %u", 1632 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1633 ni->ni_rxseqs[tid] >> 1634 IEEE80211_SEQ_SEQ_SHIFT, 1635 rxseq & IEEE80211_SEQ_FRAG_MASK, 1636 ni->ni_rxseqs[tid] & 1637 IEEE80211_SEQ_FRAG_MASK, 1638 tid); 1639 vap->iv_stats.is_rx_dup++; 1640 IEEE80211_NODE_STAT(ni, rx_dup); 1641 goto out; 1642 } 1643 ni->ni_rxseqs[tid] = rxseq; 1644 } 1645 } 1646 #ifdef IEEE80211_DEBUG 1647 /* 1648 * It's easier, but too expensive, to simulate different mesh 1649 * topologies by consulting the ACL policy very early, so do this 1650 * only under DEBUG. 1651 * 1652 * NB: this check is also done upon peering link initiation. 1653 */ 1654 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1655 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1656 wh, NULL, "%s", "disallowed by ACL"); 1657 vap->iv_stats.is_rx_acl++; 1658 goto out; 1659 } 1660 #endif 1661 switch (type) { 1662 case IEEE80211_FC0_TYPE_DATA: 1663 if (ni == vap->iv_bss) 1664 goto out; 1665 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1666 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1667 ni->ni_macaddr, NULL, 1668 "peer link not yet established (%d)", 1669 ni->ni_mlstate); 1670 vap->iv_stats.is_mesh_nolink++; 1671 goto out; 1672 } 1673 if (dir != IEEE80211_FC1_DIR_FROMDS && 1674 dir != IEEE80211_FC1_DIR_DSTODS) { 1675 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1676 wh, "data", "incorrect dir 0x%x", dir); 1677 vap->iv_stats.is_rx_wrongdir++; 1678 goto err; 1679 } 1680 1681 /* All Mesh data frames are QoS subtype */ 1682 if (!HAS_SEQ(type)) { 1683 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1684 wh, "data", "incorrect subtype 0x%x", subtype); 1685 vap->iv_stats.is_rx_badsubtype++; 1686 goto err; 1687 } 1688 1689 /* 1690 * Next up, any fragmentation. 1691 * XXX: we defrag before we even try to forward, 1692 * Mesh Control field is not present in sub-sequent 1693 * fragmented frames. This is in contrast to Draft 4.0. 1694 */ 1695 hdrspace = ieee80211_hdrspace(ic, wh); 1696 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1697 m = ieee80211_defrag(ni, m, hdrspace); 1698 if (m == NULL) { 1699 /* Fragment dropped or frame not complete yet */ 1700 goto out; 1701 } 1702 } 1703 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1704 1705 /* 1706 * Now we have a complete Mesh Data frame. 1707 */ 1708 1709 /* 1710 * Only fromDStoDS data frames use 4 address qos frames 1711 * as specified in amendment. Otherwise addr4 is located 1712 * in the Mesh Control field and a 3 address qos frame 1713 * is used. 1714 */ 1715 if (IEEE80211_IS_DSTODS(wh)) 1716 *(uint16_t *)qos = *(uint16_t *) 1717 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1718 else 1719 *(uint16_t *)qos = *(uint16_t *) 1720 ((struct ieee80211_qosframe *)wh)->i_qos; 1721 1722 /* 1723 * NB: The mesh STA sets the Mesh Control Present 1724 * subfield to 1 in the Mesh Data frame containing 1725 * an unfragmented MSDU, an A-MSDU, or the first 1726 * fragment of an MSDU. 1727 * After defrag it should always be present. 1728 */ 1729 if (!(qos[1] & IEEE80211_QOS_MC)) { 1730 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1731 ni->ni_macaddr, NULL, 1732 "%s", "Mesh control field not present"); 1733 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1734 goto err; 1735 } 1736 1737 /* pull up enough to get to the mesh control */ 1738 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1739 (m = m_pullup(m, hdrspace + 1740 sizeof(struct ieee80211_meshcntl))) == NULL) { 1741 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1742 ni->ni_macaddr, NULL, 1743 "data too short: expecting %u", hdrspace); 1744 vap->iv_stats.is_rx_tooshort++; 1745 goto out; /* XXX */ 1746 } 1747 /* 1748 * Now calculate the full extent of the headers. Note 1749 * mesh_decap will pull up anything we didn't get 1750 * above when it strips the 802.11 headers. 1751 */ 1752 mc = (const struct ieee80211_meshcntl *) 1753 (mtod(m, const uint8_t *) + hdrspace); 1754 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1755 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1756 ae * IEEE80211_ADDR_LEN; 1757 hdrspace += meshdrlen; 1758 1759 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1760 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1761 (m->m_len < hdrspace) && 1762 ((m = m_pullup(m, hdrspace)) == NULL)) { 1763 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1764 ni->ni_macaddr, NULL, 1765 "data too short: expecting %u", hdrspace); 1766 vap->iv_stats.is_rx_tooshort++; 1767 goto out; /* XXX */ 1768 } 1769 /* XXX: are we sure there is no reallocating after m_pullup? */ 1770 1771 seq = LE_READ_4(mc->mc_seq); 1772 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1773 addr = wh->i_addr3; 1774 else if (ae == IEEE80211_MESH_AE_01) 1775 addr = MC01(mc)->mc_addr4; 1776 else 1777 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1778 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1779 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1780 addr, "data", "%s", "not to me"); 1781 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1782 goto out; 1783 } 1784 if (mesh_checkpseq(vap, addr, seq) != 0) { 1785 vap->iv_stats.is_rx_dup++; 1786 goto out; 1787 } 1788 1789 /* This code "routes" the frame to the right control path */ 1790 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1791 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1792 error = 1793 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1794 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1795 error = mesh_recv_group_data(vap, m, wh, mc); 1796 else 1797 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1798 wh, mc); 1799 } else 1800 error = mesh_recv_group_data(vap, m, wh, mc); 1801 if (error < 0) 1802 goto err; 1803 else if (error > 0) 1804 goto out; 1805 1806 if (ieee80211_radiotap_active_vap(vap)) 1807 ieee80211_radiotap_rx(vap, m); 1808 need_tap = 0; 1809 1810 /* 1811 * Finally, strip the 802.11 header. 1812 */ 1813 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1814 if (m == NULL) { 1815 /* XXX mask bit to check for both */ 1816 /* don't count Null data frames as errors */ 1817 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1818 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1819 goto out; 1820 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1821 ni->ni_macaddr, "data", "%s", "decap error"); 1822 vap->iv_stats.is_rx_decap++; 1823 IEEE80211_NODE_STAT(ni, rx_decap); 1824 goto err; 1825 } 1826 if (qos[0] & IEEE80211_QOS_AMSDU) { 1827 m = ieee80211_decap_amsdu(ni, m); 1828 if (m == NULL) 1829 return IEEE80211_FC0_TYPE_DATA; 1830 } 1831 ieee80211_deliver_data(vap, ni, m); 1832 return type; 1833 case IEEE80211_FC0_TYPE_MGT: 1834 vap->iv_stats.is_rx_mgmt++; 1835 IEEE80211_NODE_STAT(ni, rx_mgmt); 1836 if (dir != IEEE80211_FC1_DIR_NODS) { 1837 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1838 wh, "mgt", "incorrect dir 0x%x", dir); 1839 vap->iv_stats.is_rx_wrongdir++; 1840 goto err; 1841 } 1842 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1843 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1844 ni->ni_macaddr, "mgt", "too short: len %u", 1845 m->m_pkthdr.len); 1846 vap->iv_stats.is_rx_tooshort++; 1847 goto out; 1848 } 1849 #ifdef IEEE80211_DEBUG 1850 if ((ieee80211_msg_debug(vap) && 1851 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1852 ieee80211_msg_dumppkts(vap)) { 1853 if_printf(ifp, "received %s from %s rssi %d\n", 1854 ieee80211_mgt_subtype_name[subtype >> 1855 IEEE80211_FC0_SUBTYPE_SHIFT], 1856 ether_sprintf(wh->i_addr2), rssi); 1857 } 1858 #endif 1859 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1860 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1861 wh, NULL, "%s", "WEP set but not permitted"); 1862 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1863 goto out; 1864 } 1865 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1866 goto out; 1867 case IEEE80211_FC0_TYPE_CTL: 1868 vap->iv_stats.is_rx_ctl++; 1869 IEEE80211_NODE_STAT(ni, rx_ctrl); 1870 goto out; 1871 default: 1872 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1873 wh, "bad", "frame type 0x%x", type); 1874 /* should not come here */ 1875 break; 1876 } 1877 err: 1878 IFNET_STAT_INC(ifp, ierrors, 1); 1879 out: 1880 if (m != NULL) { 1881 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1882 ieee80211_radiotap_rx(vap, m); 1883 m_freem(m); 1884 } 1885 return type; 1886 #undef HAS_SEQ 1887 #undef MC01 1888 #undef MC10 1889 } 1890 1891 static void 1892 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1893 int rssi, int nf) 1894 { 1895 struct ieee80211vap *vap = ni->ni_vap; 1896 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1897 struct ieee80211com *ic = ni->ni_ic; 1898 struct ieee80211_frame *wh; 1899 struct ieee80211_mesh_route *rt; 1900 uint8_t *frm, *efrm; 1901 1902 wh = mtod(m0, struct ieee80211_frame *); 1903 frm = (uint8_t *)&wh[1]; 1904 efrm = mtod(m0, uint8_t *) + m0->m_len; 1905 switch (subtype) { 1906 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1907 case IEEE80211_FC0_SUBTYPE_BEACON: 1908 { 1909 struct ieee80211_scanparams scan; 1910 /* 1911 * We process beacon/probe response 1912 * frames to discover neighbors. 1913 */ 1914 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1915 return; 1916 /* 1917 * Count frame now that we know it's to be processed. 1918 */ 1919 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1920 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1921 IEEE80211_NODE_STAT(ni, rx_beacons); 1922 } else 1923 IEEE80211_NODE_STAT(ni, rx_proberesp); 1924 /* 1925 * If scanning, just pass information to the scan module. 1926 */ 1927 if (ic->ic_flags & IEEE80211_F_SCAN) { 1928 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1929 /* 1930 * Actively scanning a channel marked passive; 1931 * send a probe request now that we know there 1932 * is 802.11 traffic present. 1933 * 1934 * XXX check if the beacon we recv'd gives 1935 * us what we need and suppress the probe req 1936 */ 1937 ieee80211_probe_curchan(vap, 1); 1938 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1939 } 1940 ieee80211_add_scan(vap, &scan, wh, 1941 subtype, rssi, nf); 1942 return; 1943 } 1944 1945 /* The rest of this code assumes we are running */ 1946 if (vap->iv_state != IEEE80211_S_RUN) 1947 return; 1948 /* 1949 * Ignore non-mesh STAs. 1950 */ 1951 if ((scan.capinfo & 1952 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1953 scan.meshid == NULL || scan.meshconf == NULL) { 1954 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1955 wh, "beacon", "%s", "not a mesh sta"); 1956 vap->iv_stats.is_mesh_wrongmesh++; 1957 return; 1958 } 1959 /* 1960 * Ignore STAs for other mesh networks. 1961 */ 1962 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1963 mesh_verify_meshconf(vap, scan.meshconf)) { 1964 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1965 wh, "beacon", "%s", "not for our mesh"); 1966 vap->iv_stats.is_mesh_wrongmesh++; 1967 return; 1968 } 1969 /* 1970 * Peer only based on the current ACL policy. 1971 */ 1972 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1973 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1974 wh, NULL, "%s", "disallowed by ACL"); 1975 vap->iv_stats.is_rx_acl++; 1976 return; 1977 } 1978 /* 1979 * Do neighbor discovery. 1980 */ 1981 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1982 /* 1983 * Create a new entry in the neighbor table. 1984 */ 1985 ni = ieee80211_add_neighbor(vap, wh, &scan); 1986 } 1987 /* 1988 * Automatically peer with discovered nodes if possible. 1989 */ 1990 if (ni != vap->iv_bss && 1991 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1992 switch (ni->ni_mlstate) { 1993 case IEEE80211_NODE_MESH_IDLE: 1994 { 1995 uint16_t args[1]; 1996 1997 /* Wait for backoff callout to reset counter */ 1998 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1999 return; 2000 2001 ni->ni_mlpid = mesh_generateid(vap); 2002 if (ni->ni_mlpid == 0) 2003 return; 2004 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 2005 args[0] = ni->ni_mlpid; 2006 ieee80211_send_action(ni, 2007 IEEE80211_ACTION_CAT_SELF_PROT, 2008 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2009 ni->ni_mlrcnt = 0; 2010 mesh_peer_timeout_setup(ni); 2011 break; 2012 } 2013 case IEEE80211_NODE_MESH_ESTABLISHED: 2014 { 2015 /* 2016 * Valid beacon from a peer mesh STA 2017 * bump TA lifetime 2018 */ 2019 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 2020 if(rt != NULL) { 2021 ieee80211_mesh_rt_update(rt, 2022 ticks_to_msecs( 2023 ms->ms_ppath->mpp_inact)); 2024 } 2025 break; 2026 } 2027 default: 2028 break; /* ignore */ 2029 } 2030 } 2031 break; 2032 } 2033 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2034 { 2035 uint8_t *ssid, *meshid, *rates, *xrates; 2036 uint8_t *sfrm; 2037 2038 if (vap->iv_state != IEEE80211_S_RUN) { 2039 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2040 wh, NULL, "wrong state %s", 2041 ieee80211_state_name[vap->iv_state]); 2042 vap->iv_stats.is_rx_mgtdiscard++; 2043 return; 2044 } 2045 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 2046 /* frame must be directed */ 2047 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2048 wh, NULL, "%s", "not unicast"); 2049 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 2050 return; 2051 } 2052 /* 2053 * prreq frame format 2054 * [tlv] ssid 2055 * [tlv] supported rates 2056 * [tlv] extended supported rates 2057 * [tlv] mesh id 2058 */ 2059 ssid = meshid = rates = xrates = NULL; 2060 sfrm = frm; 2061 while (efrm - frm > 1) { 2062 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2063 switch (*frm) { 2064 case IEEE80211_ELEMID_SSID: 2065 ssid = frm; 2066 break; 2067 case IEEE80211_ELEMID_RATES: 2068 rates = frm; 2069 break; 2070 case IEEE80211_ELEMID_XRATES: 2071 xrates = frm; 2072 break; 2073 case IEEE80211_ELEMID_MESHID: 2074 meshid = frm; 2075 break; 2076 } 2077 frm += frm[1] + 2; 2078 } 2079 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2080 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2081 if (xrates != NULL) 2082 IEEE80211_VERIFY_ELEMENT(xrates, 2083 IEEE80211_RATE_MAXSIZE - rates[1], return); 2084 if (meshid != NULL) { 2085 IEEE80211_VERIFY_ELEMENT(meshid, 2086 IEEE80211_MESHID_LEN, return); 2087 /* NB: meshid, not ssid */ 2088 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2089 } 2090 2091 /* XXX find a better class or define it's own */ 2092 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2093 "%s", "recv probe req"); 2094 /* 2095 * Some legacy 11b clients cannot hack a complete 2096 * probe response frame. When the request includes 2097 * only a bare-bones rate set, communicate this to 2098 * the transmit side. 2099 */ 2100 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2101 break; 2102 } 2103 2104 case IEEE80211_FC0_SUBTYPE_ACTION: 2105 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2106 if (ni == vap->iv_bss) { 2107 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2108 wh, NULL, "%s", "unknown node"); 2109 vap->iv_stats.is_rx_mgtdiscard++; 2110 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2111 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2112 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2113 wh, NULL, "%s", "not for us"); 2114 vap->iv_stats.is_rx_mgtdiscard++; 2115 } else if (vap->iv_state != IEEE80211_S_RUN) { 2116 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2117 wh, NULL, "wrong state %s", 2118 ieee80211_state_name[vap->iv_state]); 2119 vap->iv_stats.is_rx_mgtdiscard++; 2120 } else { 2121 if (ieee80211_parse_action(ni, m0) == 0) 2122 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2123 } 2124 break; 2125 2126 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2127 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2128 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2129 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2130 case IEEE80211_FC0_SUBTYPE_ATIM: 2131 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2132 case IEEE80211_FC0_SUBTYPE_AUTH: 2133 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2134 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2135 wh, NULL, "%s", "not handled"); 2136 vap->iv_stats.is_rx_mgtdiscard++; 2137 break; 2138 2139 default: 2140 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2141 wh, "mgt", "subtype 0x%x not handled", subtype); 2142 vap->iv_stats.is_rx_badsubtype++; 2143 break; 2144 } 2145 } 2146 2147 static void 2148 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2149 { 2150 2151 switch (subtype) { 2152 case IEEE80211_FC0_SUBTYPE_BAR: 2153 ieee80211_recv_bar(ni, m); 2154 break; 2155 } 2156 } 2157 2158 /* 2159 * Parse meshpeering action ie's for MPM frames 2160 */ 2161 static const struct ieee80211_meshpeer_ie * 2162 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2163 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2164 const uint8_t *frm, const uint8_t *efrm, 2165 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2166 { 2167 struct ieee80211vap *vap = ni->ni_vap; 2168 const struct ieee80211_meshpeer_ie *mpie; 2169 uint16_t args[3]; 2170 const uint8_t *meshid, *meshconf, *meshpeer; 2171 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2172 2173 meshid = meshconf = meshpeer = NULL; 2174 while (efrm - frm > 1) { 2175 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2176 switch (*frm) { 2177 case IEEE80211_ELEMID_MESHID: 2178 meshid = frm; 2179 break; 2180 case IEEE80211_ELEMID_MESHCONF: 2181 meshconf = frm; 2182 break; 2183 case IEEE80211_ELEMID_MESHPEER: 2184 meshpeer = frm; 2185 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2186 memset(mp, 0, sizeof(*mp)); 2187 mp->peer_len = mpie->peer_len; 2188 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 2189 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 2190 switch (subtype) { 2191 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2192 mp->peer_linkid = 2193 LE_READ_2(&mpie->peer_linkid); 2194 break; 2195 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2196 /* NB: peer link ID is optional */ 2197 if (mpie->peer_len == 2198 (IEEE80211_MPM_BASE_SZ + 2)) { 2199 mp->peer_linkid = 0; 2200 mp->peer_rcode = 2201 LE_READ_2(&mpie->peer_linkid); 2202 } else { 2203 mp->peer_linkid = 2204 LE_READ_2(&mpie->peer_linkid); 2205 mp->peer_rcode = 2206 LE_READ_2(&mpie->peer_rcode); 2207 } 2208 break; 2209 } 2210 break; 2211 } 2212 frm += frm[1] + 2; 2213 } 2214 2215 /* 2216 * Verify the contents of the frame. 2217 * If it fails validation, close the peer link. 2218 */ 2219 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2220 sendclose = 1; 2221 IEEE80211_DISCARD(vap, 2222 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2223 wh, NULL, "%s", "MPM validation failed"); 2224 } 2225 2226 /* If meshid is not the same reject any frames type. */ 2227 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2228 sendclose = 1; 2229 IEEE80211_DISCARD(vap, 2230 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2231 wh, NULL, "%s", "not for our mesh"); 2232 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2233 /* 2234 * Standard not clear about this, if we dont ignore 2235 * there will be an endless loop between nodes sending 2236 * CLOSE frames between each other with wrong meshid. 2237 * Discard and timers will bring FSM to IDLE state. 2238 */ 2239 return NULL; 2240 } 2241 } 2242 2243 /* 2244 * Close frames are accepted if meshid is the same. 2245 * Verify the other two types. 2246 */ 2247 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2248 mesh_verify_meshconf(vap, meshconf)) { 2249 sendclose = 1; 2250 IEEE80211_DISCARD(vap, 2251 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2252 wh, NULL, "%s", "configuration missmatch"); 2253 } 2254 2255 if (sendclose) { 2256 vap->iv_stats.is_rx_mgtdiscard++; 2257 switch (ni->ni_mlstate) { 2258 case IEEE80211_NODE_MESH_IDLE: 2259 case IEEE80211_NODE_MESH_ESTABLISHED: 2260 case IEEE80211_NODE_MESH_HOLDING: 2261 /* ignore */ 2262 break; 2263 case IEEE80211_NODE_MESH_OPENSNT: 2264 case IEEE80211_NODE_MESH_OPENRCV: 2265 case IEEE80211_NODE_MESH_CONFIRMRCV: 2266 args[0] = ni->ni_mlpid; 2267 args[1] = ni->ni_mllid; 2268 /* Reason codes for rejection */ 2269 switch (subtype) { 2270 case IEEE80211_ACTION_MESHPEERING_OPEN: 2271 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2272 break; 2273 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2274 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2275 break; 2276 } 2277 ieee80211_send_action(ni, 2278 IEEE80211_ACTION_CAT_SELF_PROT, 2279 IEEE80211_ACTION_MESHPEERING_CLOSE, 2280 args); 2281 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2282 mesh_peer_timeout_setup(ni); 2283 break; 2284 } 2285 return NULL; 2286 } 2287 2288 return (const struct ieee80211_meshpeer_ie *) mp; 2289 } 2290 2291 static int 2292 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2293 const struct ieee80211_frame *wh, 2294 const uint8_t *frm, const uint8_t *efrm) 2295 { 2296 struct ieee80211vap *vap = ni->ni_vap; 2297 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2298 struct ieee80211_meshpeer_ie ie; 2299 const struct ieee80211_meshpeer_ie *meshpeer; 2300 uint16_t args[3]; 2301 2302 /* +2+2 for action + code + capabilites */ 2303 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2304 IEEE80211_ACTION_MESHPEERING_OPEN); 2305 if (meshpeer == NULL) { 2306 return 0; 2307 } 2308 2309 /* XXX move up */ 2310 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2311 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2312 2313 switch (ni->ni_mlstate) { 2314 case IEEE80211_NODE_MESH_IDLE: 2315 /* Reject open request if reached our maximum neighbor count */ 2316 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2317 args[0] = meshpeer->peer_llinkid; 2318 args[1] = 0; 2319 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2320 ieee80211_send_action(ni, 2321 IEEE80211_ACTION_CAT_SELF_PROT, 2322 IEEE80211_ACTION_MESHPEERING_CLOSE, 2323 args); 2324 /* stay in IDLE state */ 2325 return (0); 2326 } 2327 /* Open frame accepted */ 2328 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2329 ni->ni_mllid = meshpeer->peer_llinkid; 2330 ni->ni_mlpid = mesh_generateid(vap); 2331 if (ni->ni_mlpid == 0) 2332 return 0; /* XXX */ 2333 args[0] = ni->ni_mlpid; 2334 /* Announce we're open too... */ 2335 ieee80211_send_action(ni, 2336 IEEE80211_ACTION_CAT_SELF_PROT, 2337 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2338 /* ...and confirm the link. */ 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 mesh_peer_timeout_setup(ni); 2346 break; 2347 case IEEE80211_NODE_MESH_OPENRCV: 2348 /* Wrong Link ID */ 2349 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2350 args[0] = ni->ni_mllid; 2351 args[1] = ni->ni_mlpid; 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, IEEE80211_NODE_MESH_HOLDING); 2358 mesh_peer_timeout_setup(ni); 2359 break; 2360 } 2361 /* Duplicate open, confirm again. */ 2362 args[0] = ni->ni_mlpid; 2363 args[1] = ni->ni_mllid; 2364 ieee80211_send_action(ni, 2365 IEEE80211_ACTION_CAT_SELF_PROT, 2366 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2367 args); 2368 break; 2369 case IEEE80211_NODE_MESH_OPENSNT: 2370 ni->ni_mllid = meshpeer->peer_llinkid; 2371 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2372 args[0] = ni->ni_mlpid; 2373 args[1] = ni->ni_mllid; 2374 ieee80211_send_action(ni, 2375 IEEE80211_ACTION_CAT_SELF_PROT, 2376 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2377 args); 2378 /* NB: don't setup/clear any timeout */ 2379 break; 2380 case IEEE80211_NODE_MESH_CONFIRMRCV: 2381 if (ni->ni_mlpid != meshpeer->peer_linkid || 2382 ni->ni_mllid != meshpeer->peer_llinkid) { 2383 args[0] = ni->ni_mlpid; 2384 args[1] = ni->ni_mllid; 2385 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2386 ieee80211_send_action(ni, 2387 IEEE80211_ACTION_CAT_SELF_PROT, 2388 IEEE80211_ACTION_MESHPEERING_CLOSE, 2389 args); 2390 mesh_linkchange(ni, 2391 IEEE80211_NODE_MESH_HOLDING); 2392 mesh_peer_timeout_setup(ni); 2393 break; 2394 } 2395 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2396 ni->ni_mllid = meshpeer->peer_llinkid; 2397 args[0] = ni->ni_mlpid; 2398 args[1] = ni->ni_mllid; 2399 ieee80211_send_action(ni, 2400 IEEE80211_ACTION_CAT_SELF_PROT, 2401 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2402 args); 2403 mesh_peer_timeout_stop(ni); 2404 break; 2405 case IEEE80211_NODE_MESH_ESTABLISHED: 2406 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2407 args[0] = ni->ni_mllid; 2408 args[1] = ni->ni_mlpid; 2409 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2410 ieee80211_send_action(ni, 2411 IEEE80211_ACTION_CAT_SELF_PROT, 2412 IEEE80211_ACTION_MESHPEERING_CLOSE, 2413 args); 2414 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2415 mesh_peer_timeout_setup(ni); 2416 break; 2417 } 2418 args[0] = ni->ni_mlpid; 2419 args[1] = ni->ni_mllid; 2420 ieee80211_send_action(ni, 2421 IEEE80211_ACTION_CAT_SELF_PROT, 2422 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2423 args); 2424 break; 2425 case IEEE80211_NODE_MESH_HOLDING: 2426 args[0] = ni->ni_mlpid; 2427 args[1] = meshpeer->peer_llinkid; 2428 /* Standard not clear about what the reaason code should be */ 2429 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2430 ieee80211_send_action(ni, 2431 IEEE80211_ACTION_CAT_SELF_PROT, 2432 IEEE80211_ACTION_MESHPEERING_CLOSE, 2433 args); 2434 break; 2435 } 2436 return 0; 2437 } 2438 2439 static int 2440 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2441 const struct ieee80211_frame *wh, 2442 const uint8_t *frm, const uint8_t *efrm) 2443 { 2444 struct ieee80211vap *vap = ni->ni_vap; 2445 struct ieee80211_meshpeer_ie ie; 2446 const struct ieee80211_meshpeer_ie *meshpeer; 2447 uint16_t args[3]; 2448 2449 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2450 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2451 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2452 if (meshpeer == NULL) { 2453 return 0; 2454 } 2455 2456 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2457 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2458 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2459 2460 switch (ni->ni_mlstate) { 2461 case IEEE80211_NODE_MESH_OPENRCV: 2462 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2463 mesh_peer_timeout_stop(ni); 2464 break; 2465 case IEEE80211_NODE_MESH_OPENSNT: 2466 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2467 mesh_peer_timeout_setup(ni); 2468 break; 2469 case IEEE80211_NODE_MESH_HOLDING: 2470 args[0] = ni->ni_mlpid; 2471 args[1] = meshpeer->peer_llinkid; 2472 /* Standard not clear about what the reaason code should be */ 2473 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2474 ieee80211_send_action(ni, 2475 IEEE80211_ACTION_CAT_SELF_PROT, 2476 IEEE80211_ACTION_MESHPEERING_CLOSE, 2477 args); 2478 break; 2479 case IEEE80211_NODE_MESH_CONFIRMRCV: 2480 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2481 args[0] = ni->ni_mlpid; 2482 args[1] = ni->ni_mllid; 2483 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2484 ieee80211_send_action(ni, 2485 IEEE80211_ACTION_CAT_SELF_PROT, 2486 IEEE80211_ACTION_MESHPEERING_CLOSE, 2487 args); 2488 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2489 mesh_peer_timeout_setup(ni); 2490 } 2491 break; 2492 default: 2493 IEEE80211_DISCARD(vap, 2494 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2495 wh, NULL, "received confirm in invalid state %d", 2496 ni->ni_mlstate); 2497 vap->iv_stats.is_rx_mgtdiscard++; 2498 break; 2499 } 2500 return 0; 2501 } 2502 2503 static int 2504 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2505 const struct ieee80211_frame *wh, 2506 const uint8_t *frm, const uint8_t *efrm) 2507 { 2508 struct ieee80211_meshpeer_ie ie; 2509 const struct ieee80211_meshpeer_ie *meshpeer; 2510 uint16_t args[3]; 2511 2512 /* +2 for action + code */ 2513 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2514 IEEE80211_ACTION_MESHPEERING_CLOSE); 2515 if (meshpeer == NULL) { 2516 return 0; 2517 } 2518 2519 /* 2520 * XXX: check reason code, for example we could receive 2521 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2522 * to peer again. 2523 */ 2524 2525 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2526 ni, "%s", "recv PEER CLOSE"); 2527 2528 switch (ni->ni_mlstate) { 2529 case IEEE80211_NODE_MESH_IDLE: 2530 /* ignore */ 2531 break; 2532 case IEEE80211_NODE_MESH_OPENRCV: 2533 case IEEE80211_NODE_MESH_OPENSNT: 2534 case IEEE80211_NODE_MESH_CONFIRMRCV: 2535 case IEEE80211_NODE_MESH_ESTABLISHED: 2536 args[0] = ni->ni_mlpid; 2537 args[1] = ni->ni_mllid; 2538 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2539 ieee80211_send_action(ni, 2540 IEEE80211_ACTION_CAT_SELF_PROT, 2541 IEEE80211_ACTION_MESHPEERING_CLOSE, 2542 args); 2543 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2544 mesh_peer_timeout_setup(ni); 2545 break; 2546 case IEEE80211_NODE_MESH_HOLDING: 2547 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2548 mesh_peer_timeout_stop(ni); 2549 break; 2550 } 2551 return 0; 2552 } 2553 2554 /* 2555 * Link Metric handling. 2556 */ 2557 static int 2558 mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2559 const struct ieee80211_frame *wh, 2560 const uint8_t *frm, const uint8_t *efrm) 2561 { 2562 const struct ieee80211_meshlmetric_ie *ie = 2563 (const struct ieee80211_meshlmetric_ie *) 2564 (frm+2); /* action + code */ 2565 struct ieee80211_meshlmetric_ie lm_rep; 2566 2567 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2568 lm_rep.lm_flags = 0; 2569 lm_rep.lm_metric = mesh_airtime_calc(ni); 2570 ieee80211_send_action(ni, 2571 IEEE80211_ACTION_CAT_MESH, 2572 IEEE80211_ACTION_MESH_LMETRIC, 2573 &lm_rep); 2574 } 2575 /* XXX: else do nothing for now */ 2576 return 0; 2577 } 2578 2579 /* 2580 * Parse meshgate action ie's for GANN frames. 2581 * Returns -1 if parsing fails, otherwise 0. 2582 */ 2583 static int 2584 mesh_parse_meshgate_action(struct ieee80211_node *ni, 2585 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2586 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2587 { 2588 struct ieee80211vap *vap = ni->ni_vap; 2589 const struct ieee80211_meshgann_ie *gannie; 2590 2591 while (efrm - frm > 1) { 2592 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2593 switch (*frm) { 2594 case IEEE80211_ELEMID_MESHGANN: 2595 gannie = (const struct ieee80211_meshgann_ie *) frm; 2596 memset(ie, 0, sizeof(*ie)); 2597 ie->gann_ie = gannie->gann_ie; 2598 ie->gann_len = gannie->gann_len; 2599 ie->gann_flags = gannie->gann_flags; 2600 ie->gann_hopcount = gannie->gann_hopcount; 2601 ie->gann_ttl = gannie->gann_ttl; 2602 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2603 ie->gann_seq = LE_READ_4(&gannie->gann_seq); 2604 ie->gann_interval = LE_READ_2(&gannie->gann_interval); 2605 break; 2606 } 2607 frm += frm[1] + 2; 2608 } 2609 2610 return 0; 2611 } 2612 2613 /* 2614 * Mesh Gate Announcement handling. 2615 */ 2616 static int 2617 mesh_recv_action_meshgate(struct ieee80211_node *ni, 2618 const struct ieee80211_frame *wh, 2619 const uint8_t *frm, const uint8_t *efrm) 2620 { 2621 struct ieee80211vap *vap = ni->ni_vap; 2622 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2623 struct ieee80211_mesh_gate_route *gr, *next; 2624 struct ieee80211_mesh_route *rt_gate; 2625 struct ieee80211_meshgann_ie pgann; 2626 struct ieee80211_meshgann_ie ie; 2627 int found = 0; 2628 2629 /* +2 for action + code */ 2630 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2631 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2632 ni->ni_macaddr, NULL, "%s", 2633 "GANN parsing failed"); 2634 vap->iv_stats.is_rx_mgtdiscard++; 2635 return (0); 2636 } 2637 2638 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2639 return 0; 2640 2641 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2642 "received GANN, meshgate: %s (seq %u)", 2643 ether_sprintf(ie.gann_addr), 2644 ie.gann_seq); 2645 2646 if (ms == NULL) 2647 return (0); 2648 MESH_RT_LOCK(ms); 2649 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2650 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2651 continue; 2652 if (ie.gann_seq <= gr->gr_lastseq) { 2653 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2654 ni->ni_macaddr, NULL, 2655 "GANN old seqno %u <= %u", 2656 ie.gann_seq, gr->gr_lastseq); 2657 MESH_RT_UNLOCK(ms); 2658 return (0); 2659 } 2660 /* corresponding mesh gate found & GANN accepted */ 2661 found = 1; 2662 break; 2663 2664 } 2665 if (found == 0) { 2666 /* this GANN is from a new mesh Gate add it to known table. */ 2667 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2668 "stored new GANN information, seq %u.", ie.gann_seq); 2669 gr = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2670 M_80211_MESH_GT_RT, M_INTWAIT | M_ZERO); 2671 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2672 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2673 } 2674 gr->gr_lastseq = ie.gann_seq; 2675 2676 /* check if we have a path to this gate */ 2677 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2678 if (rt_gate != NULL && 2679 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2680 gr->gr_route = rt_gate; 2681 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2682 } 2683 2684 MESH_RT_UNLOCK(ms); 2685 2686 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2687 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2688 return 0; 2689 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2690 pgann.gann_hopcount = ie.gann_hopcount + 1; 2691 pgann.gann_ttl = ie.gann_ttl - 1; 2692 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2693 pgann.gann_seq = ie.gann_seq; 2694 pgann.gann_interval = ie.gann_interval; 2695 2696 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2697 "%s", "propagate GANN"); 2698 2699 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2700 IEEE80211_ACTION_MESH_GANN, &pgann); 2701 2702 return 0; 2703 } 2704 2705 static int 2706 mesh_send_action(struct ieee80211_node *ni, 2707 const uint8_t sa[IEEE80211_ADDR_LEN], 2708 const uint8_t da[IEEE80211_ADDR_LEN], 2709 struct mbuf *m) 2710 { 2711 struct ieee80211vap *vap = ni->ni_vap; 2712 struct ieee80211com *ic = ni->ni_ic; 2713 struct ieee80211_bpf_params params; 2714 struct ieee80211_frame *wh; 2715 int ret; 2716 2717 KASSERT(ni != NULL, ("null node")); 2718 2719 if (vap->iv_state == IEEE80211_S_CAC) { 2720 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2721 "block %s frame in CAC state", "Mesh action"); 2722 vap->iv_stats.is_tx_badstate++; 2723 ieee80211_free_node(ni); 2724 m_freem(m); 2725 return EIO; /* XXX */ 2726 } 2727 2728 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2729 if (m == NULL) { 2730 ieee80211_free_node(ni); 2731 return ENOMEM; 2732 } 2733 2734 IEEE80211_TX_LOCK(ic); 2735 wh = mtod(m, struct ieee80211_frame *); 2736 ieee80211_send_setup(ni, m, 2737 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2738 IEEE80211_NONQOS_TID, sa, da, sa); 2739 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2740 2741 memset(¶ms, 0, sizeof(params)); 2742 params.ibp_pri = WME_AC_VO; 2743 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2744 if (IEEE80211_IS_MULTICAST(da)) 2745 params.ibp_try0 = 1; 2746 else 2747 params.ibp_try0 = ni->ni_txparms->maxretry; 2748 params.ibp_power = ni->ni_txpower; 2749 2750 IEEE80211_NODE_STAT(ni, tx_mgmt); 2751 2752 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2753 IEEE80211_TX_UNLOCK(ic); 2754 return (ret); 2755 } 2756 2757 #define ADDSHORT(frm, v) do { \ 2758 frm[0] = (v) & 0xff; \ 2759 frm[1] = (v) >> 8; \ 2760 frm += 2; \ 2761 } while (0) 2762 #define ADDWORD(frm, v) do { \ 2763 frm[0] = (v) & 0xff; \ 2764 frm[1] = ((v) >> 8) & 0xff; \ 2765 frm[2] = ((v) >> 16) & 0xff; \ 2766 frm[3] = ((v) >> 24) & 0xff; \ 2767 frm += 4; \ 2768 } while (0) 2769 2770 static int 2771 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2772 int category, int action, void *args0) 2773 { 2774 struct ieee80211vap *vap = ni->ni_vap; 2775 struct ieee80211com *ic = ni->ni_ic; 2776 uint16_t *args = args0; 2777 const struct ieee80211_rateset *rs; 2778 struct mbuf *m; 2779 uint8_t *frm; 2780 2781 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2782 "send PEER OPEN action: localid 0x%x", args[0]); 2783 2784 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2785 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2786 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2787 ieee80211_ref_node(ni); 2788 2789 m = ieee80211_getmgtframe(&frm, 2790 ic->ic_headroom + sizeof(struct ieee80211_frame), 2791 sizeof(uint16_t) /* action+category */ 2792 + sizeof(uint16_t) /* capabilites */ 2793 + 2 + IEEE80211_RATE_SIZE 2794 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2795 + 2 + IEEE80211_MESHID_LEN 2796 + sizeof(struct ieee80211_meshconf_ie) 2797 + sizeof(struct ieee80211_meshpeer_ie) 2798 ); 2799 if (m != NULL) { 2800 /* 2801 * mesh peer open action frame format: 2802 * [1] category 2803 * [1] action 2804 * [2] capabilities 2805 * [tlv] rates 2806 * [tlv] xrates 2807 * [tlv] mesh id 2808 * [tlv] mesh conf 2809 * [tlv] mesh peer link mgmt 2810 */ 2811 *frm++ = category; 2812 *frm++ = action; 2813 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2814 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2815 frm = ieee80211_add_rates(frm, rs); 2816 frm = ieee80211_add_xrates(frm, rs); 2817 frm = ieee80211_add_meshid(frm, vap); 2818 frm = ieee80211_add_meshconf(frm, vap); 2819 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2820 args[0], 0, 0); 2821 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2822 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2823 } else { 2824 vap->iv_stats.is_tx_nobuf++; 2825 ieee80211_free_node(ni); 2826 return ENOMEM; 2827 } 2828 } 2829 2830 static int 2831 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2832 int category, int action, void *args0) 2833 { 2834 struct ieee80211vap *vap = ni->ni_vap; 2835 struct ieee80211com *ic = ni->ni_ic; 2836 uint16_t *args = args0; 2837 const struct ieee80211_rateset *rs; 2838 struct mbuf *m; 2839 uint8_t *frm; 2840 2841 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2842 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2843 args[0], args[1]); 2844 2845 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2846 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2847 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2848 ieee80211_ref_node(ni); 2849 2850 m = ieee80211_getmgtframe(&frm, 2851 ic->ic_headroom + sizeof(struct ieee80211_frame), 2852 sizeof(uint16_t) /* action+category */ 2853 + sizeof(uint16_t) /* capabilites */ 2854 + sizeof(uint16_t) /* status code */ 2855 + sizeof(uint16_t) /* AID */ 2856 + 2 + IEEE80211_RATE_SIZE 2857 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2858 + 2 + IEEE80211_MESHID_LEN 2859 + sizeof(struct ieee80211_meshconf_ie) 2860 + sizeof(struct ieee80211_meshpeer_ie) 2861 ); 2862 if (m != NULL) { 2863 /* 2864 * mesh peer confirm action frame format: 2865 * [1] category 2866 * [1] action 2867 * [2] capabilities 2868 * [2] status code 2869 * [2] association id (peer ID) 2870 * [tlv] rates 2871 * [tlv] xrates 2872 * [tlv] mesh id 2873 * [tlv] mesh conf 2874 * [tlv] mesh peer link mgmt 2875 */ 2876 *frm++ = category; 2877 *frm++ = action; 2878 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2879 ADDSHORT(frm, 0); /* status code */ 2880 ADDSHORT(frm, args[1]); /* AID */ 2881 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2882 frm = ieee80211_add_rates(frm, rs); 2883 frm = ieee80211_add_xrates(frm, rs); 2884 frm = ieee80211_add_meshid(frm, vap); 2885 frm = ieee80211_add_meshconf(frm, vap); 2886 frm = ieee80211_add_meshpeer(frm, 2887 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2888 args[0], args[1], 0); 2889 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2890 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2891 } else { 2892 vap->iv_stats.is_tx_nobuf++; 2893 ieee80211_free_node(ni); 2894 return ENOMEM; 2895 } 2896 } 2897 2898 static int 2899 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2900 int category, int action, void *args0) 2901 { 2902 struct ieee80211vap *vap = ni->ni_vap; 2903 struct ieee80211com *ic = ni->ni_ic; 2904 uint16_t *args = args0; 2905 struct mbuf *m; 2906 uint8_t *frm; 2907 2908 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2909 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2910 args[0], args[1], args[2]); 2911 2912 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2913 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2914 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2915 ieee80211_ref_node(ni); 2916 2917 m = ieee80211_getmgtframe(&frm, 2918 ic->ic_headroom + sizeof(struct ieee80211_frame), 2919 sizeof(uint16_t) /* action+category */ 2920 + sizeof(uint16_t) /* reason code */ 2921 + 2 + IEEE80211_MESHID_LEN 2922 + sizeof(struct ieee80211_meshpeer_ie) 2923 ); 2924 if (m != NULL) { 2925 /* 2926 * mesh peer close action frame format: 2927 * [1] category 2928 * [1] action 2929 * [tlv] mesh id 2930 * [tlv] mesh peer link mgmt 2931 */ 2932 *frm++ = category; 2933 *frm++ = action; 2934 frm = ieee80211_add_meshid(frm, vap); 2935 frm = ieee80211_add_meshpeer(frm, 2936 IEEE80211_ACTION_MESHPEERING_CLOSE, 2937 args[0], args[1], args[2]); 2938 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2939 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2940 } else { 2941 vap->iv_stats.is_tx_nobuf++; 2942 ieee80211_free_node(ni); 2943 return ENOMEM; 2944 } 2945 } 2946 2947 static int 2948 mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2949 int category, int action, void *arg0) 2950 { 2951 struct ieee80211vap *vap = ni->ni_vap; 2952 struct ieee80211com *ic = ni->ni_ic; 2953 struct ieee80211_meshlmetric_ie *ie = arg0; 2954 struct mbuf *m; 2955 uint8_t *frm; 2956 2957 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2958 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2959 ni, "%s", "send LINK METRIC REQUEST action"); 2960 } else { 2961 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2962 ni, "send LINK METRIC REPLY action: metric 0x%x", 2963 ie->lm_metric); 2964 } 2965 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2966 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2967 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2968 ieee80211_ref_node(ni); 2969 2970 m = ieee80211_getmgtframe(&frm, 2971 ic->ic_headroom + sizeof(struct ieee80211_frame), 2972 sizeof(uint16_t) + /* action+category */ 2973 sizeof(struct ieee80211_meshlmetric_ie) 2974 ); 2975 if (m != NULL) { 2976 /* 2977 * mesh link metric 2978 * [1] category 2979 * [1] action 2980 * [tlv] mesh link metric 2981 */ 2982 *frm++ = category; 2983 *frm++ = action; 2984 frm = ieee80211_add_meshlmetric(frm, 2985 ie->lm_flags, ie->lm_metric); 2986 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2987 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2988 } else { 2989 vap->iv_stats.is_tx_nobuf++; 2990 ieee80211_free_node(ni); 2991 return ENOMEM; 2992 } 2993 } 2994 2995 static int 2996 mesh_send_action_meshgate(struct ieee80211_node *ni, 2997 int category, int action, void *arg0) 2998 { 2999 struct ieee80211vap *vap = ni->ni_vap; 3000 struct ieee80211com *ic = ni->ni_ic; 3001 struct ieee80211_meshgann_ie *ie = arg0; 3002 struct mbuf *m; 3003 uint8_t *frm; 3004 3005 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3006 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 3007 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 3008 ieee80211_ref_node(ni); 3009 3010 m = ieee80211_getmgtframe(&frm, 3011 ic->ic_headroom + sizeof(struct ieee80211_frame), 3012 sizeof(uint16_t) + /* action+category */ 3013 IEEE80211_MESHGANN_BASE_SZ 3014 ); 3015 if (m != NULL) { 3016 /* 3017 * mesh link metric 3018 * [1] category 3019 * [1] action 3020 * [tlv] mesh gate annoucement 3021 */ 3022 *frm++ = category; 3023 *frm++ = action; 3024 frm = ieee80211_add_meshgate(frm, ie); 3025 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3026 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 3027 } else { 3028 vap->iv_stats.is_tx_nobuf++; 3029 ieee80211_free_node(ni); 3030 return ENOMEM; 3031 } 3032 } 3033 3034 static void 3035 mesh_peer_timeout_setup(struct ieee80211_node *ni) 3036 { 3037 switch (ni->ni_mlstate) { 3038 case IEEE80211_NODE_MESH_HOLDING: 3039 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 3040 break; 3041 case IEEE80211_NODE_MESH_CONFIRMRCV: 3042 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 3043 break; 3044 case IEEE80211_NODE_MESH_IDLE: 3045 ni->ni_mltval = 0; 3046 break; 3047 default: 3048 ni->ni_mltval = ieee80211_mesh_retrytimeout; 3049 break; 3050 } 3051 if (ni->ni_mltval) 3052 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 3053 mesh_peer_timeout_cb, ni); 3054 } 3055 3056 /* 3057 * Same as above but backoffs timer statisically 50%. 3058 */ 3059 static void 3060 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3061 { 3062 uint32_t r; 3063 3064 r = arc4random(); 3065 ni->ni_mltval += r % ni->ni_mltval; 3066 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3067 ni); 3068 } 3069 3070 static __inline void 3071 mesh_peer_timeout_stop(struct ieee80211_node *ni) 3072 { 3073 callout_drain(&ni->ni_mltimer); 3074 } 3075 3076 static void 3077 mesh_peer_backoff_cb(void *arg) 3078 { 3079 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3080 3081 /* After backoff timeout, try to peer automatically again. */ 3082 ni->ni_mlhcnt = 0; 3083 } 3084 3085 /* 3086 * Mesh Peer Link Management FSM timeout handling. 3087 */ 3088 static void 3089 mesh_peer_timeout_cb(void *arg) 3090 { 3091 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3092 uint16_t args[3]; 3093 3094 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3095 ni, "mesh link timeout, state %d, retry counter %d", 3096 ni->ni_mlstate, ni->ni_mlrcnt); 3097 3098 switch (ni->ni_mlstate) { 3099 case IEEE80211_NODE_MESH_IDLE: 3100 case IEEE80211_NODE_MESH_ESTABLISHED: 3101 break; 3102 case IEEE80211_NODE_MESH_OPENSNT: 3103 case IEEE80211_NODE_MESH_OPENRCV: 3104 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3105 args[0] = ni->ni_mlpid; 3106 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3107 ieee80211_send_action(ni, 3108 IEEE80211_ACTION_CAT_SELF_PROT, 3109 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3110 ni->ni_mlrcnt = 0; 3111 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3112 mesh_peer_timeout_setup(ni); 3113 } else { 3114 args[0] = ni->ni_mlpid; 3115 ieee80211_send_action(ni, 3116 IEEE80211_ACTION_CAT_SELF_PROT, 3117 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3118 ni->ni_mlrcnt++; 3119 mesh_peer_timeout_backoff(ni); 3120 } 3121 break; 3122 case IEEE80211_NODE_MESH_CONFIRMRCV: 3123 args[0] = ni->ni_mlpid; 3124 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3125 ieee80211_send_action(ni, 3126 IEEE80211_ACTION_CAT_SELF_PROT, 3127 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3128 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3129 mesh_peer_timeout_setup(ni); 3130 break; 3131 case IEEE80211_NODE_MESH_HOLDING: 3132 ni->ni_mlhcnt++; 3133 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3134 callout_reset(&ni->ni_mlhtimer, 3135 ieee80211_mesh_backofftimeout, 3136 mesh_peer_backoff_cb, ni); 3137 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3138 break; 3139 } 3140 } 3141 3142 static int 3143 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3144 { 3145 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3146 3147 if (ie == NULL || ie[1] != ms->ms_idlen) 3148 return 1; 3149 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3150 } 3151 3152 /* 3153 * Check if we are using the same algorithms for this mesh. 3154 */ 3155 static int 3156 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3157 { 3158 const struct ieee80211_meshconf_ie *meshconf = 3159 (const struct ieee80211_meshconf_ie *) ie; 3160 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3161 3162 if (meshconf == NULL) 3163 return 1; 3164 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3165 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3166 "unknown path selection algorithm: 0x%x\n", 3167 meshconf->conf_pselid); 3168 return 1; 3169 } 3170 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3171 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3172 "unknown path metric algorithm: 0x%x\n", 3173 meshconf->conf_pmetid); 3174 return 1; 3175 } 3176 if (meshconf->conf_ccid != 0) { 3177 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3178 "unknown congestion control algorithm: 0x%x\n", 3179 meshconf->conf_ccid); 3180 return 1; 3181 } 3182 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3183 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3184 "unknown sync algorithm: 0x%x\n", 3185 meshconf->conf_syncid); 3186 return 1; 3187 } 3188 if (meshconf->conf_authid != 0) { 3189 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3190 "unknown auth auth algorithm: 0x%x\n", 3191 meshconf->conf_pselid); 3192 return 1; 3193 } 3194 /* Not accepting peers */ 3195 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3196 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3197 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3198 return 1; 3199 } 3200 return 0; 3201 } 3202 3203 static int 3204 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3205 const uint8_t *ie) 3206 { 3207 const struct ieee80211_meshpeer_ie *meshpeer = 3208 (const struct ieee80211_meshpeer_ie *) ie; 3209 3210 if (meshpeer == NULL || 3211 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3212 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3213 return 1; 3214 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3215 IEEE80211_DPRINTF(vap, 3216 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3217 "Only MPM protocol is supported (proto: 0x%02X)", 3218 meshpeer->peer_proto); 3219 return 1; 3220 } 3221 switch (subtype) { 3222 case IEEE80211_ACTION_MESHPEERING_OPEN: 3223 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3224 return 1; 3225 break; 3226 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3227 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3228 return 1; 3229 break; 3230 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3231 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3232 return 1; 3233 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3234 meshpeer->peer_linkid != 0) 3235 return 1; 3236 if (meshpeer->peer_rcode == 0) 3237 return 1; 3238 break; 3239 } 3240 return 0; 3241 } 3242 3243 /* 3244 * Add a Mesh ID IE to a frame. 3245 */ 3246 uint8_t * 3247 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3248 { 3249 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3250 3251 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3252 3253 *frm++ = IEEE80211_ELEMID_MESHID; 3254 *frm++ = ms->ms_idlen; 3255 memcpy(frm, ms->ms_id, ms->ms_idlen); 3256 return frm + ms->ms_idlen; 3257 } 3258 3259 /* 3260 * Add a Mesh Configuration IE to a frame. 3261 * For now just use HWMP routing, Airtime link metric, Null Congestion 3262 * Signaling, Null Sync Protocol and Null Authentication. 3263 */ 3264 uint8_t * 3265 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3266 { 3267 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3268 uint16_t caps; 3269 3270 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3271 3272 *frm++ = IEEE80211_ELEMID_MESHCONF; 3273 *frm++ = IEEE80211_MESH_CONF_SZ; 3274 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3275 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3276 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3277 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3278 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3279 /* NB: set the number of neighbors before the rest */ 3280 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3281 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3282 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3283 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3284 frm += 1; 3285 caps = 0; 3286 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3287 caps |= IEEE80211_MESHCONF_CAP_AP; 3288 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3289 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3290 *frm++ = caps; 3291 return frm; 3292 } 3293 3294 /* 3295 * Add a Mesh Peer Management IE to a frame. 3296 */ 3297 uint8_t * 3298 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3299 uint16_t peerid, uint16_t reason) 3300 { 3301 3302 KASSERT(localid != 0, ("localid == 0")); 3303 3304 *frm++ = IEEE80211_ELEMID_MESHPEER; 3305 switch (subtype) { 3306 case IEEE80211_ACTION_MESHPEERING_OPEN: 3307 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3308 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3309 ADDSHORT(frm, localid); /* local ID */ 3310 break; 3311 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3312 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3313 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3314 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3315 ADDSHORT(frm, localid); /* local ID */ 3316 ADDSHORT(frm, peerid); /* peer ID */ 3317 break; 3318 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3319 if (peerid) 3320 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3321 else 3322 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3323 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3324 ADDSHORT(frm, localid); /* local ID */ 3325 if (peerid) 3326 ADDSHORT(frm, peerid); /* peer ID */ 3327 ADDSHORT(frm, reason); 3328 break; 3329 } 3330 return frm; 3331 } 3332 3333 /* 3334 * Compute an Airtime Link Metric for the link with this node. 3335 * 3336 * Based on Draft 3.0 spec (11B.10, p.149). 3337 */ 3338 /* 3339 * Max 802.11s overhead. 3340 */ 3341 #define IEEE80211_MESH_MAXOVERHEAD \ 3342 (sizeof(struct ieee80211_qosframe_addr4) \ 3343 + sizeof(struct ieee80211_meshcntl_ae10) \ 3344 + sizeof(struct llc) \ 3345 + IEEE80211_ADDR_LEN \ 3346 + IEEE80211_WEP_IVLEN \ 3347 + IEEE80211_WEP_KIDLEN \ 3348 + IEEE80211_WEP_CRCLEN \ 3349 + IEEE80211_WEP_MICLEN \ 3350 + IEEE80211_CRC_LEN) 3351 uint32_t 3352 mesh_airtime_calc(struct ieee80211_node *ni) 3353 { 3354 #define M_BITS 8 3355 #define S_FACTOR (2 * M_BITS) 3356 struct ieee80211com *ic = ni->ni_ic; 3357 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3358 static const int nbits = 8192 << M_BITS; 3359 uint32_t overhead, rate, errrate; 3360 uint64_t res; 3361 3362 /* Time to transmit a frame */ 3363 rate = ni->ni_txrate; 3364 overhead = ieee80211_compute_duration(ic->ic_rt, 3365 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3366 /* Error rate in percentage */ 3367 /* XXX assuming small failures are ok */ 3368 #if defined(__DragonFly__) 3369 u_long icount; 3370 u_long ocount; 3371 IFNET_STAT_GET(ifp, ierrors, icount); 3372 IFNET_STAT_GET(ifp, oerrors, ocount); 3373 errrate = (((ocount + icount) / 100) << M_BITS) 3374 / 100; 3375 #else 3376 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + 3377 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) 3378 / 100; 3379 #endif 3380 res = (overhead + (nbits / rate)) * 3381 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3382 3383 return (uint32_t)(res >> S_FACTOR); 3384 #undef M_BITS 3385 #undef S_FACTOR 3386 } 3387 3388 /* 3389 * Add a Mesh Link Metric report IE to a frame. 3390 */ 3391 uint8_t * 3392 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3393 { 3394 *frm++ = IEEE80211_ELEMID_MESHLINK; 3395 *frm++ = 5; 3396 *frm++ = flags; 3397 ADDWORD(frm, metric); 3398 return frm; 3399 } 3400 3401 /* 3402 * Add a Mesh Gate Announcement IE to a frame. 3403 */ 3404 uint8_t * 3405 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3406 { 3407 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3408 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3409 *frm++ = ie->gann_flags; 3410 *frm++ = ie->gann_hopcount; 3411 *frm++ = ie->gann_ttl; 3412 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3413 frm += 6; 3414 ADDWORD(frm, ie->gann_seq); 3415 ADDSHORT(frm, ie->gann_interval); 3416 return frm; 3417 } 3418 #undef ADDSHORT 3419 #undef ADDWORD 3420 3421 /* 3422 * Initialize any mesh-specific node state. 3423 */ 3424 void 3425 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3426 { 3427 ni->ni_flags |= IEEE80211_NODE_QOS; 3428 callout_init_mp(&ni->ni_mltimer); 3429 callout_init_mp(&ni->ni_mlhtimer); 3430 } 3431 3432 /* 3433 * Cleanup any mesh-specific node state. 3434 */ 3435 void 3436 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3437 { 3438 struct ieee80211vap *vap = ni->ni_vap; 3439 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3440 3441 callout_drain(&ni->ni_mltimer); 3442 callout_drain(&ni->ni_mlhtimer); 3443 /* NB: short-circuit callbacks after mesh_vdetach */ 3444 if (vap->iv_mesh != NULL) 3445 ms->ms_ppath->mpp_peerdown(ni); 3446 } 3447 3448 void 3449 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3450 { 3451 ni->ni_meshidlen = ie[1]; 3452 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3453 } 3454 3455 /* 3456 * Setup mesh-specific node state on neighbor discovery. 3457 */ 3458 void 3459 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3460 const struct ieee80211_frame *wh, 3461 const struct ieee80211_scanparams *sp) 3462 { 3463 ieee80211_parse_meshid(ni, sp->meshid); 3464 } 3465 3466 void 3467 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3468 struct ieee80211_beacon_offsets *bo) 3469 { 3470 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3471 3472 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3473 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3474 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3475 } 3476 } 3477 3478 static int 3479 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3480 { 3481 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3482 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3483 struct ieee80211_mesh_route *rt; 3484 struct ieee80211req_mesh_route *imr; 3485 size_t len, off; 3486 uint8_t *p; 3487 int error; 3488 3489 if (vap->iv_opmode != IEEE80211_M_MBSS) 3490 return ENOSYS; 3491 3492 error = 0; 3493 switch (ireq->i_type) { 3494 case IEEE80211_IOC_MESH_ID: 3495 ireq->i_len = ms->ms_idlen; 3496 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3497 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3498 break; 3499 case IEEE80211_IOC_MESH_AP: 3500 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3501 break; 3502 case IEEE80211_IOC_MESH_FWRD: 3503 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3504 break; 3505 case IEEE80211_IOC_MESH_GATE: 3506 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3507 break; 3508 case IEEE80211_IOC_MESH_TTL: 3509 ireq->i_val = ms->ms_ttl; 3510 break; 3511 case IEEE80211_IOC_MESH_RTCMD: 3512 switch (ireq->i_val) { 3513 case IEEE80211_MESH_RTCMD_LIST: 3514 len = 0; 3515 MESH_RT_LOCK(ms); 3516 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3517 len += sizeof(*imr); 3518 } 3519 MESH_RT_UNLOCK(ms); 3520 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3521 ireq->i_len = len; 3522 return ENOMEM; 3523 } 3524 ireq->i_len = len; 3525 /* XXX M_WAIT? */ 3526 p = kmalloc(len, M_TEMP, M_INTWAIT | M_ZERO); 3527 if (p == NULL) 3528 return ENOMEM; 3529 off = 0; 3530 MESH_RT_LOCK(ms); 3531 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3532 if (off >= len) 3533 break; 3534 imr = (struct ieee80211req_mesh_route *) 3535 (p + off); 3536 IEEE80211_ADDR_COPY(imr->imr_dest, 3537 rt->rt_dest); 3538 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3539 rt->rt_nexthop); 3540 imr->imr_metric = rt->rt_metric; 3541 imr->imr_nhops = rt->rt_nhops; 3542 imr->imr_lifetime = 3543 ieee80211_mesh_rt_update(rt, 0); 3544 imr->imr_lastmseq = rt->rt_lastmseq; 3545 imr->imr_flags = rt->rt_flags; /* last */ 3546 off += sizeof(*imr); 3547 } 3548 MESH_RT_UNLOCK(ms); 3549 error = copyout(p, (uint8_t *)ireq->i_data, 3550 ireq->i_len); 3551 kfree(p, M_TEMP); 3552 break; 3553 case IEEE80211_MESH_RTCMD_FLUSH: 3554 case IEEE80211_MESH_RTCMD_ADD: 3555 case IEEE80211_MESH_RTCMD_DELETE: 3556 return EINVAL; 3557 default: 3558 return ENOSYS; 3559 } 3560 break; 3561 case IEEE80211_IOC_MESH_PR_METRIC: 3562 len = strlen(ms->ms_pmetric->mpm_descr); 3563 if (ireq->i_len < len) 3564 return EINVAL; 3565 ireq->i_len = len; 3566 error = copyout(ms->ms_pmetric->mpm_descr, 3567 (uint8_t *)ireq->i_data, len); 3568 break; 3569 case IEEE80211_IOC_MESH_PR_PATH: 3570 len = strlen(ms->ms_ppath->mpp_descr); 3571 if (ireq->i_len < len) 3572 return EINVAL; 3573 ireq->i_len = len; 3574 error = copyout(ms->ms_ppath->mpp_descr, 3575 (uint8_t *)ireq->i_data, len); 3576 break; 3577 default: 3578 return ENOSYS; 3579 } 3580 3581 return error; 3582 } 3583 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3584 3585 static int 3586 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3587 { 3588 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3589 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3590 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3591 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3592 int error; 3593 3594 if (vap->iv_opmode != IEEE80211_M_MBSS) 3595 return ENOSYS; 3596 3597 error = 0; 3598 switch (ireq->i_type) { 3599 case IEEE80211_IOC_MESH_ID: 3600 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3601 return EINVAL; 3602 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3603 if (error != 0) 3604 break; 3605 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3606 ms->ms_idlen = ireq->i_len; 3607 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3608 error = ENETRESET; 3609 break; 3610 case IEEE80211_IOC_MESH_AP: 3611 if (ireq->i_val) 3612 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3613 else 3614 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3615 error = ENETRESET; 3616 break; 3617 case IEEE80211_IOC_MESH_FWRD: 3618 if (ireq->i_val) 3619 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3620 else 3621 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3622 mesh_gatemode_setup(vap); 3623 break; 3624 case IEEE80211_IOC_MESH_GATE: 3625 if (ireq->i_val) 3626 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3627 else 3628 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3629 break; 3630 case IEEE80211_IOC_MESH_TTL: 3631 ms->ms_ttl = (uint8_t) ireq->i_val; 3632 break; 3633 case IEEE80211_IOC_MESH_RTCMD: 3634 switch (ireq->i_val) { 3635 case IEEE80211_MESH_RTCMD_LIST: 3636 return EINVAL; 3637 case IEEE80211_MESH_RTCMD_FLUSH: 3638 ieee80211_mesh_rt_flush(vap); 3639 break; 3640 case IEEE80211_MESH_RTCMD_ADD: 3641 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3642 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3643 return EINVAL; 3644 error = copyin(ireq->i_data, &tmpaddr, 3645 IEEE80211_ADDR_LEN); 3646 if (error == 0) 3647 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3648 break; 3649 case IEEE80211_MESH_RTCMD_DELETE: 3650 ieee80211_mesh_rt_del(vap, ireq->i_data); 3651 break; 3652 default: 3653 return ENOSYS; 3654 } 3655 break; 3656 case IEEE80211_IOC_MESH_PR_METRIC: 3657 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3658 if (error == 0) { 3659 error = mesh_select_proto_metric(vap, tmpproto); 3660 if (error == 0) 3661 error = ENETRESET; 3662 } 3663 break; 3664 case IEEE80211_IOC_MESH_PR_PATH: 3665 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3666 if (error == 0) { 3667 error = mesh_select_proto_path(vap, tmpproto); 3668 if (error == 0) 3669 error = ENETRESET; 3670 } 3671 break; 3672 default: 3673 return ENOSYS; 3674 } 3675 return error; 3676 } 3677 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3678