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_media.h> 58 #include <net/if_llc.h> 59 #include <net/ethernet.h> 60 61 #include <net80211/ieee80211_var.h> 62 #include <net80211/ieee80211_action.h> 63 #ifdef IEEE80211_SUPPORT_SUPERG 64 #include <net80211/ieee80211_superg.h> 65 #endif 66 #include <net80211/ieee80211_input.h> 67 #include <net80211/ieee80211_mesh.h> 68 69 static void mesh_rt_flush_invalid(struct ieee80211vap *); 70 static int mesh_select_proto_path(struct ieee80211vap *, const char *); 71 static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 72 static void mesh_vattach(struct ieee80211vap *); 73 static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 74 static void mesh_rt_cleanup_cb(void *); 75 static void mesh_gatemode_setup(struct ieee80211vap *); 76 static void mesh_gatemode_cb(void *); 77 static void mesh_linkchange(struct ieee80211_node *, 78 enum ieee80211_mesh_mlstate); 79 static void mesh_checkid(void *, struct ieee80211_node *); 80 static uint32_t mesh_generateid(struct ieee80211vap *); 81 static int mesh_checkpseq(struct ieee80211vap *, 82 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 83 static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, 84 struct ieee80211_mesh_route *); 85 static void mesh_forward(struct ieee80211vap *, struct mbuf *, 86 const struct ieee80211_meshcntl *); 87 static int mesh_input(struct ieee80211_node *, struct mbuf *, int, int); 88 static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 89 int, int); 90 static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 91 static void mesh_peer_timeout_setup(struct ieee80211_node *); 92 static void mesh_peer_timeout_backoff(struct ieee80211_node *); 93 static void mesh_peer_timeout_cb(void *); 94 static __inline void 95 mesh_peer_timeout_stop(struct ieee80211_node *); 96 static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 97 static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 98 static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 99 const uint8_t *); 100 uint32_t mesh_airtime_calc(struct ieee80211_node *); 101 102 /* 103 * Timeout values come from the specification and are in milliseconds. 104 */ 105 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 106 "IEEE 802.11s parameters"); 107 static int ieee80211_mesh_gateint = -1; 108 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW, 109 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 110 "mesh gate interval (ms)"); 111 static int ieee80211_mesh_retrytimeout = -1; 112 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, 113 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 114 "Retry timeout (msec)"); 115 static int ieee80211_mesh_holdingtimeout = -1; 116 117 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, 118 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 119 "Holding state timeout (msec)"); 120 static int ieee80211_mesh_confirmtimeout = -1; 121 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, 122 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 123 "Confirm state timeout (msec)"); 124 static int ieee80211_mesh_backofftimeout = -1; 125 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW, 126 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 127 "Backoff timeout (msec). This is to throutles peering forever when " 128 "not receving answer or is rejected by a neighbor"); 129 static int ieee80211_mesh_maxretries = 2; 130 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW, 131 &ieee80211_mesh_maxretries, 0, 132 "Maximum retries during peer link establishment"); 133 static int ieee80211_mesh_maxholding = 2; 134 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLTYPE_INT | CTLFLAG_RW, 135 &ieee80211_mesh_maxholding, 0, 136 "Maximum times we are allowed to transition to HOLDING state before " 137 "backinoff during peer link establishment"); 138 139 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 140 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 141 142 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 143 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 144 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 145 static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 146 static ieee80211_recv_action_func mesh_recv_action_meshgate; 147 148 static ieee80211_send_action_func mesh_send_action_meshpeering_open; 149 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 150 static ieee80211_send_action_func mesh_send_action_meshpeering_close; 151 static ieee80211_send_action_func mesh_send_action_meshlmetric; 152 static ieee80211_send_action_func mesh_send_action_meshgate; 153 154 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 155 .mpm_descr = "AIRTIME", 156 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 157 .mpm_metric = mesh_airtime_calc, 158 }; 159 160 static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 161 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 162 163 #define RT_ENTRY_LOCK(rt) mtx_lock(&(rt)->rt_lock) 164 #define RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED) 165 #define RT_ENTRY_UNLOCK(rt) mtx_unlock(&(rt)->rt_lock) 166 167 #define MESH_RT_LOCK(ms) mtx_lock(&(ms)->ms_rt_lock) 168 #define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED) 169 #define MESH_RT_UNLOCK(ms) mtx_unlock(&(ms)->ms_rt_lock) 170 171 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 172 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 173 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 174 175 /* The longer one of the lifetime should be stored as new lifetime */ 176 #define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 177 178 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 179 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 180 181 /* 182 * Helper functions to manipulate the Mesh routing table. 183 */ 184 185 static struct ieee80211_mesh_route * 186 mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 187 const uint8_t dest[IEEE80211_ADDR_LEN]) 188 { 189 struct ieee80211_mesh_route *rt; 190 191 MESH_RT_LOCK_ASSERT(ms); 192 193 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 194 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 195 return rt; 196 } 197 return NULL; 198 } 199 200 static struct ieee80211_mesh_route * 201 mesh_rt_add_locked(struct ieee80211vap *vap, 202 const uint8_t dest[IEEE80211_ADDR_LEN]) 203 { 204 struct ieee80211_mesh_state *ms = vap->iv_mesh; 205 struct ieee80211_mesh_route *rt; 206 207 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 208 ("%s: adding broadcast to the routing table", __func__)); 209 210 MESH_RT_LOCK_ASSERT(ms); 211 212 rt = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) + 213 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | M_ZERO); 214 if (rt != NULL) { 215 rt->rt_vap = vap; 216 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 217 rt->rt_priv = (void *)ALIGN(&rt[1]); 218 mtx_init(&rt->rt_lock, "MBSS_RT", "802.11s route entry", MTX_DEF); 219 callout_init(&rt->rt_discovery, CALLOUT_MPSAFE); 220 rt->rt_updtime = ticks; /* create time */ 221 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 222 } 223 return rt; 224 } 225 226 struct ieee80211_mesh_route * 227 ieee80211_mesh_rt_find(struct ieee80211vap *vap, 228 const uint8_t dest[IEEE80211_ADDR_LEN]) 229 { 230 struct ieee80211_mesh_state *ms = vap->iv_mesh; 231 struct ieee80211_mesh_route *rt; 232 233 MESH_RT_LOCK(ms); 234 rt = mesh_rt_find_locked(ms, dest); 235 MESH_RT_UNLOCK(ms); 236 return rt; 237 } 238 239 struct ieee80211_mesh_route * 240 ieee80211_mesh_rt_add(struct ieee80211vap *vap, 241 const uint8_t dest[IEEE80211_ADDR_LEN]) 242 { 243 struct ieee80211_mesh_state *ms = vap->iv_mesh; 244 struct ieee80211_mesh_route *rt; 245 246 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 247 ("%s: duplicate entry in the routing table", __func__)); 248 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 249 ("%s: adding self to the routing table", __func__)); 250 251 MESH_RT_LOCK(ms); 252 rt = mesh_rt_add_locked(vap, dest); 253 MESH_RT_UNLOCK(ms); 254 return rt; 255 } 256 257 /* 258 * Update the route lifetime and returns the updated lifetime. 259 * If new_lifetime is zero and route is timedout it will be invalidated. 260 * new_lifetime is in msec 261 */ 262 int 263 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 264 { 265 int timesince, now; 266 uint32_t lifetime = 0; 267 268 KASSERT(rt != NULL, ("route is NULL")); 269 270 now = ticks; 271 RT_ENTRY_LOCK(rt); 272 273 /* dont clobber a proxy entry gated by us */ 274 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 275 RT_ENTRY_UNLOCK(rt); 276 return rt->rt_lifetime; 277 } 278 279 timesince = ticks_to_msecs(now - rt->rt_updtime); 280 rt->rt_updtime = now; 281 if (timesince >= rt->rt_lifetime) { 282 if (new_lifetime != 0) { 283 rt->rt_lifetime = new_lifetime; 284 } 285 else { 286 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 287 rt->rt_lifetime = 0; 288 } 289 } else { 290 /* update what is left of lifetime */ 291 rt->rt_lifetime = rt->rt_lifetime - timesince; 292 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 293 new_lifetime, rt->rt_lifetime); 294 } 295 lifetime = rt->rt_lifetime; 296 RT_ENTRY_UNLOCK(rt); 297 298 return lifetime; 299 } 300 301 /* 302 * Add a proxy route (as needed) for the specified destination. 303 */ 304 void 305 ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 306 const uint8_t dest[IEEE80211_ADDR_LEN]) 307 { 308 struct ieee80211_mesh_state *ms = vap->iv_mesh; 309 struct ieee80211_mesh_route *rt; 310 311 MESH_RT_LOCK(ms); 312 rt = mesh_rt_find_locked(ms, dest); 313 if (rt == NULL) { 314 rt = mesh_rt_add_locked(vap, dest); 315 if (rt == NULL) { 316 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 317 "%s", "unable to add proxy entry"); 318 vap->iv_stats.is_mesh_rtaddfailed++; 319 } else { 320 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 321 "%s", "add proxy entry"); 322 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 323 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 324 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 325 | IEEE80211_MESHRT_FLAGS_PROXY; 326 } 327 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 328 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 329 ("no proxy flag for poxy entry")); 330 struct ieee80211com *ic = vap->iv_ic; 331 /* 332 * Fix existing entry created by received frames from 333 * stations that have some memory of dest. We also 334 * flush any frames held on the staging queue; delivering 335 * them is too much trouble right now. 336 */ 337 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 338 "%s", "fix proxy entry"); 339 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 340 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 341 | IEEE80211_MESHRT_FLAGS_PROXY; 342 /* XXX belongs in hwmp */ 343 ieee80211_ageq_drain_node(&ic->ic_stageq, 344 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 345 /* XXX stat? */ 346 } 347 MESH_RT_UNLOCK(ms); 348 } 349 350 static __inline void 351 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 352 { 353 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 354 /* 355 * Grab the lock before destroying it, to be sure no one else 356 * is holding the route. 357 */ 358 RT_ENTRY_LOCK(rt); 359 callout_drain(&rt->rt_discovery); 360 mtx_destroy(&rt->rt_lock); 361 free(rt, M_80211_MESH_RT); 362 } 363 364 void 365 ieee80211_mesh_rt_del(struct ieee80211vap *vap, 366 const uint8_t dest[IEEE80211_ADDR_LEN]) 367 { 368 struct ieee80211_mesh_state *ms = vap->iv_mesh; 369 struct ieee80211_mesh_route *rt, *next; 370 371 MESH_RT_LOCK(ms); 372 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 373 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 374 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 375 ms->ms_ppath->mpp_senderror(vap, dest, rt, 376 IEEE80211_REASON_MESH_PERR_NO_PROXY); 377 } else { 378 ms->ms_ppath->mpp_senderror(vap, dest, rt, 379 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 380 } 381 mesh_rt_del(ms, rt); 382 MESH_RT_UNLOCK(ms); 383 return; 384 } 385 } 386 MESH_RT_UNLOCK(ms); 387 } 388 389 void 390 ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 391 { 392 struct ieee80211_mesh_state *ms = vap->iv_mesh; 393 struct ieee80211_mesh_route *rt, *next; 394 395 if (ms == NULL) 396 return; 397 MESH_RT_LOCK(ms); 398 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 399 mesh_rt_del(ms, rt); 400 MESH_RT_UNLOCK(ms); 401 } 402 403 void 404 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 405 const uint8_t peer[IEEE80211_ADDR_LEN]) 406 { 407 struct ieee80211_mesh_state *ms = vap->iv_mesh; 408 struct ieee80211_mesh_route *rt, *next; 409 410 MESH_RT_LOCK(ms); 411 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 412 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 413 mesh_rt_del(ms, rt); 414 } 415 MESH_RT_UNLOCK(ms); 416 } 417 418 /* 419 * Flush expired routing entries, i.e. those in invalid state for 420 * some time. 421 */ 422 static void 423 mesh_rt_flush_invalid(struct ieee80211vap *vap) 424 { 425 struct ieee80211_mesh_state *ms = vap->iv_mesh; 426 struct ieee80211_mesh_route *rt, *next; 427 428 if (ms == NULL) 429 return; 430 MESH_RT_LOCK(ms); 431 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 432 /* Discover paths will be deleted by their own callout */ 433 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 434 continue; 435 ieee80211_mesh_rt_update(rt, 0); 436 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 437 mesh_rt_del(ms, rt); 438 } 439 MESH_RT_UNLOCK(ms); 440 } 441 442 #define N(a) (sizeof(a) / sizeof(a[0])) 443 int 444 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 445 { 446 int i, firstempty = -1; 447 448 for (i = 0; i < N(mesh_proto_paths); i++) { 449 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 450 IEEE80211_MESH_PROTO_DSZ) == 0) 451 return EEXIST; 452 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 453 firstempty = i; 454 } 455 if (firstempty < 0) 456 return ENOSPC; 457 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 458 mesh_proto_paths[firstempty].mpp_active = 1; 459 return 0; 460 } 461 462 int 463 ieee80211_mesh_register_proto_metric(const struct 464 ieee80211_mesh_proto_metric *mpm) 465 { 466 int i, firstempty = -1; 467 468 for (i = 0; i < N(mesh_proto_metrics); i++) { 469 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 470 IEEE80211_MESH_PROTO_DSZ) == 0) 471 return EEXIST; 472 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 473 firstempty = i; 474 } 475 if (firstempty < 0) 476 return ENOSPC; 477 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 478 mesh_proto_metrics[firstempty].mpm_active = 1; 479 return 0; 480 } 481 482 static int 483 mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 484 { 485 struct ieee80211_mesh_state *ms = vap->iv_mesh; 486 int i; 487 488 for (i = 0; i < N(mesh_proto_paths); i++) { 489 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 490 ms->ms_ppath = &mesh_proto_paths[i]; 491 return 0; 492 } 493 } 494 return ENOENT; 495 } 496 497 static int 498 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 499 { 500 struct ieee80211_mesh_state *ms = vap->iv_mesh; 501 int i; 502 503 for (i = 0; i < N(mesh_proto_metrics); i++) { 504 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 505 ms->ms_pmetric = &mesh_proto_metrics[i]; 506 return 0; 507 } 508 } 509 return ENOENT; 510 } 511 #undef N 512 513 static void 514 mesh_gatemode_setup(struct ieee80211vap *vap) 515 { 516 struct ieee80211_mesh_state *ms = vap->iv_mesh; 517 518 /* 519 * NB: When a mesh gate is running as a ROOT it shall 520 * not send out periodic GANNs but instead mark the 521 * mesh gate flag for the corresponding proactive PREQ 522 * and RANN frames. 523 */ 524 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 525 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 526 callout_drain(&ms->ms_gatetimer); 527 return ; 528 } 529 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 530 mesh_gatemode_cb, vap); 531 } 532 533 static void 534 mesh_gatemode_cb(void *arg) 535 { 536 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 537 struct ieee80211_mesh_state *ms = vap->iv_mesh; 538 struct ieee80211_meshgann_ie gann; 539 540 gann.gann_flags = 0; /* Reserved */ 541 gann.gann_hopcount = 0; 542 gann.gann_ttl = ms->ms_ttl; 543 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 544 gann.gann_seq = ms->ms_gateseq++; 545 gann.gann_interval = ieee80211_mesh_gateint; 546 547 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 548 "send broadcast GANN (seq %u)", gann.gann_seq); 549 550 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 551 IEEE80211_ACTION_MESH_GANN, &gann); 552 mesh_gatemode_setup(vap); 553 } 554 555 static void 556 ieee80211_mesh_init(void) 557 { 558 559 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 560 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 561 562 /* 563 * Setup mesh parameters that depends on the clock frequency. 564 */ 565 ieee80211_mesh_gateint = msecs_to_ticks(10000); 566 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 567 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 568 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 569 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 570 571 /* 572 * Register action frame handlers. 573 */ 574 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 575 IEEE80211_ACTION_MESHPEERING_OPEN, 576 mesh_recv_action_meshpeering_open); 577 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 578 IEEE80211_ACTION_MESHPEERING_CONFIRM, 579 mesh_recv_action_meshpeering_confirm); 580 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 581 IEEE80211_ACTION_MESHPEERING_CLOSE, 582 mesh_recv_action_meshpeering_close); 583 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 584 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 585 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 586 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 587 588 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 589 IEEE80211_ACTION_MESHPEERING_OPEN, 590 mesh_send_action_meshpeering_open); 591 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 592 IEEE80211_ACTION_MESHPEERING_CONFIRM, 593 mesh_send_action_meshpeering_confirm); 594 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 595 IEEE80211_ACTION_MESHPEERING_CLOSE, 596 mesh_send_action_meshpeering_close); 597 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 598 IEEE80211_ACTION_MESH_LMETRIC, 599 mesh_send_action_meshlmetric); 600 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 601 IEEE80211_ACTION_MESH_GANN, 602 mesh_send_action_meshgate); 603 604 /* 605 * Register Airtime Link Metric. 606 */ 607 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 608 609 } 610 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 611 612 void 613 ieee80211_mesh_attach(struct ieee80211com *ic) 614 { 615 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 616 } 617 618 void 619 ieee80211_mesh_detach(struct ieee80211com *ic) 620 { 621 } 622 623 static void 624 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 625 { 626 struct ieee80211com *ic = ni->ni_ic; 627 uint16_t args[3]; 628 629 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 630 args[0] = ni->ni_mlpid; 631 args[1] = ni->ni_mllid; 632 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 633 ieee80211_send_action(ni, 634 IEEE80211_ACTION_CAT_SELF_PROT, 635 IEEE80211_ACTION_MESHPEERING_CLOSE, 636 args); 637 } 638 callout_drain(&ni->ni_mltimer); 639 /* XXX belongs in hwmp */ 640 ieee80211_ageq_drain_node(&ic->ic_stageq, 641 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 642 } 643 644 static void 645 mesh_vdetach(struct ieee80211vap *vap) 646 { 647 struct ieee80211_mesh_state *ms = vap->iv_mesh; 648 649 callout_drain(&ms->ms_cleantimer); 650 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 651 NULL); 652 ieee80211_mesh_rt_flush(vap); 653 mtx_destroy(&ms->ms_rt_lock); 654 ms->ms_ppath->mpp_vdetach(vap); 655 free(vap->iv_mesh, M_80211_VAP); 656 vap->iv_mesh = NULL; 657 } 658 659 static void 660 mesh_vattach(struct ieee80211vap *vap) 661 { 662 struct ieee80211_mesh_state *ms; 663 vap->iv_newstate = mesh_newstate; 664 vap->iv_input = mesh_input; 665 vap->iv_opdetach = mesh_vdetach; 666 vap->iv_recv_mgmt = mesh_recv_mgmt; 667 vap->iv_recv_ctl = mesh_recv_ctl; 668 ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 669 M_NOWAIT | M_ZERO); 670 if (ms == NULL) { 671 printf("%s: couldn't alloc MBSS state\n", __func__); 672 return; 673 } 674 vap->iv_mesh = ms; 675 ms->ms_seq = 0; 676 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 677 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 678 TAILQ_INIT(&ms->ms_known_gates); 679 TAILQ_INIT(&ms->ms_routes); 680 mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF); 681 callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE); 682 callout_init(&ms->ms_gatetimer, CALLOUT_MPSAFE); 683 ms->ms_gateseq = 0; 684 mesh_select_proto_metric(vap, "AIRTIME"); 685 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 686 mesh_select_proto_path(vap, "HWMP"); 687 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 688 ms->ms_ppath->mpp_vattach(vap); 689 } 690 691 /* 692 * IEEE80211_M_MBSS vap state machine handler. 693 */ 694 static int 695 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 696 { 697 struct ieee80211_mesh_state *ms = vap->iv_mesh; 698 struct ieee80211com *ic = vap->iv_ic; 699 struct ieee80211_node *ni; 700 enum ieee80211_state ostate; 701 702 IEEE80211_LOCK_ASSERT(ic); 703 704 ostate = vap->iv_state; 705 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 706 __func__, ieee80211_state_name[ostate], 707 ieee80211_state_name[nstate], arg); 708 vap->iv_state = nstate; /* state transition */ 709 if (ostate != IEEE80211_S_SCAN) 710 ieee80211_cancel_scan(vap); /* background scan */ 711 ni = vap->iv_bss; /* NB: no reference held */ 712 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 713 callout_drain(&ms->ms_cleantimer); 714 callout_drain(&ms->ms_gatetimer); 715 } 716 switch (nstate) { 717 case IEEE80211_S_INIT: 718 switch (ostate) { 719 case IEEE80211_S_SCAN: 720 ieee80211_cancel_scan(vap); 721 break; 722 case IEEE80211_S_CAC: 723 ieee80211_dfs_cac_stop(vap); 724 break; 725 case IEEE80211_S_RUN: 726 ieee80211_iterate_nodes(&ic->ic_sta, 727 mesh_vdetach_peers, NULL); 728 break; 729 default: 730 break; 731 } 732 if (ostate != IEEE80211_S_INIT) { 733 /* NB: optimize INIT -> INIT case */ 734 ieee80211_reset_bss(vap); 735 ieee80211_mesh_rt_flush(vap); 736 } 737 break; 738 case IEEE80211_S_SCAN: 739 switch (ostate) { 740 case IEEE80211_S_INIT: 741 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 742 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 743 ms->ms_idlen != 0) { 744 /* 745 * Already have a channel and a mesh ID; bypass 746 * the scan and startup immediately. 747 */ 748 ieee80211_create_ibss(vap, vap->iv_des_chan); 749 break; 750 } 751 /* 752 * Initiate a scan. We can come here as a result 753 * of an IEEE80211_IOC_SCAN_REQ too in which case 754 * the vap will be marked with IEEE80211_FEXT_SCANREQ 755 * and the scan request parameters will be present 756 * in iv_scanreq. Otherwise we do the default. 757 */ 758 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 759 ieee80211_check_scan(vap, 760 vap->iv_scanreq_flags, 761 vap->iv_scanreq_duration, 762 vap->iv_scanreq_mindwell, 763 vap->iv_scanreq_maxdwell, 764 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 765 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 766 } else 767 ieee80211_check_scan_current(vap); 768 break; 769 default: 770 break; 771 } 772 break; 773 case IEEE80211_S_CAC: 774 /* 775 * Start CAC on a DFS channel. We come here when starting 776 * a bss on a DFS channel (see ieee80211_create_ibss). 777 */ 778 ieee80211_dfs_cac_start(vap); 779 break; 780 case IEEE80211_S_RUN: 781 switch (ostate) { 782 case IEEE80211_S_INIT: 783 /* 784 * Already have a channel; bypass the 785 * scan and startup immediately. 786 * Note that ieee80211_create_ibss will call 787 * back to do a RUN->RUN state change. 788 */ 789 ieee80211_create_ibss(vap, 790 ieee80211_ht_adjust_channel(ic, 791 ic->ic_curchan, vap->iv_flags_ht)); 792 /* NB: iv_bss is changed on return */ 793 break; 794 case IEEE80211_S_CAC: 795 /* 796 * NB: This is the normal state change when CAC 797 * expires and no radar was detected; no need to 798 * clear the CAC timer as it's already expired. 799 */ 800 /* fall thru... */ 801 case IEEE80211_S_CSA: 802 #if 0 803 /* 804 * Shorten inactivity timer of associated stations 805 * to weed out sta's that don't follow a CSA. 806 */ 807 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 808 #endif 809 /* 810 * Update bss node channel to reflect where 811 * we landed after CSA. 812 */ 813 ieee80211_node_set_chan(vap->iv_bss, 814 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 815 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 816 /* XXX bypass debug msgs */ 817 break; 818 case IEEE80211_S_SCAN: 819 case IEEE80211_S_RUN: 820 #ifdef IEEE80211_DEBUG 821 if (ieee80211_msg_debug(vap)) { 822 struct ieee80211_node *ni = vap->iv_bss; 823 ieee80211_note(vap, 824 "synchronized with %s meshid ", 825 ether_sprintf(ni->ni_meshid)); 826 ieee80211_print_essid(ni->ni_meshid, 827 ni->ni_meshidlen); 828 /* XXX MCS/HT */ 829 printf(" channel %d\n", 830 ieee80211_chan2ieee(ic, ic->ic_curchan)); 831 } 832 #endif 833 break; 834 default: 835 break; 836 } 837 ieee80211_node_authorize(vap->iv_bss); 838 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 839 mesh_rt_cleanup_cb, vap); 840 mesh_gatemode_setup(vap); 841 break; 842 default: 843 break; 844 } 845 /* NB: ostate not nstate */ 846 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 847 return 0; 848 } 849 850 static void 851 mesh_rt_cleanup_cb(void *arg) 852 { 853 struct ieee80211vap *vap = arg; 854 struct ieee80211_mesh_state *ms = vap->iv_mesh; 855 856 mesh_rt_flush_invalid(vap); 857 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 858 mesh_rt_cleanup_cb, vap); 859 } 860 861 /* 862 * Mark a mesh STA as gate and return a pointer to it. 863 * If this is first time, we create a new gate route. 864 * Always update the path route to this mesh gate. 865 */ 866 struct ieee80211_mesh_gate_route * 867 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 868 struct ieee80211_mesh_route *rt) 869 { 870 struct ieee80211_mesh_state *ms = vap->iv_mesh; 871 struct ieee80211_mesh_gate_route *gr = NULL, *next; 872 int found = 0; 873 874 MESH_RT_LOCK(ms); 875 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 876 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 877 found = 1; 878 break; 879 } 880 } 881 882 if (!found) { 883 /* New mesh gate add it to known table. */ 884 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 885 "%s", "stored new gate information from pro-PREQ."); 886 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 887 M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO); 888 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 889 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 890 } 891 gr->gr_route = rt; 892 /* TODO: link from path route to gate route */ 893 MESH_RT_UNLOCK(ms); 894 895 return gr; 896 } 897 898 899 /* 900 * Helper function to note the Mesh Peer Link FSM change. 901 */ 902 static void 903 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 904 { 905 struct ieee80211vap *vap = ni->ni_vap; 906 struct ieee80211_mesh_state *ms = vap->iv_mesh; 907 #ifdef IEEE80211_DEBUG 908 static const char *meshlinkstates[] = { 909 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 910 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 911 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 912 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 913 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 914 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 915 }; 916 #endif 917 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 918 ni, "peer link: %s -> %s", 919 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 920 921 /* track neighbor count */ 922 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 923 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 924 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 925 ms->ms_neighbors++; 926 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 927 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 928 state != IEEE80211_NODE_MESH_ESTABLISHED) { 929 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 930 ms->ms_neighbors--; 931 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 932 } 933 ni->ni_mlstate = state; 934 switch (state) { 935 case IEEE80211_NODE_MESH_HOLDING: 936 ms->ms_ppath->mpp_peerdown(ni); 937 break; 938 case IEEE80211_NODE_MESH_ESTABLISHED: 939 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 940 break; 941 default: 942 break; 943 } 944 } 945 946 /* 947 * Helper function to generate a unique local ID required for mesh 948 * peer establishment. 949 */ 950 static void 951 mesh_checkid(void *arg, struct ieee80211_node *ni) 952 { 953 uint16_t *r = arg; 954 955 if (*r == ni->ni_mllid) 956 *(uint16_t *)arg = 0; 957 } 958 959 static uint32_t 960 mesh_generateid(struct ieee80211vap *vap) 961 { 962 int maxiter = 4; 963 uint16_t r; 964 965 do { 966 get_random_bytes(&r, 2); 967 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 968 maxiter--; 969 } while (r == 0 && maxiter > 0); 970 return r; 971 } 972 973 /* 974 * Verifies if we already received this packet by checking its 975 * sequence number. 976 * Returns 0 if the frame is to be accepted, 1 otherwise. 977 */ 978 static int 979 mesh_checkpseq(struct ieee80211vap *vap, 980 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 981 { 982 struct ieee80211_mesh_route *rt; 983 984 rt = ieee80211_mesh_rt_find(vap, source); 985 if (rt == NULL) { 986 rt = ieee80211_mesh_rt_add(vap, source); 987 if (rt == NULL) { 988 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 989 "%s", "add mcast route failed"); 990 vap->iv_stats.is_mesh_rtaddfailed++; 991 return 1; 992 } 993 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 994 "add mcast route, mesh seqno %d", seq); 995 rt->rt_lastmseq = seq; 996 return 0; 997 } 998 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 999 return 1; 1000 } else { 1001 rt->rt_lastmseq = seq; 1002 return 0; 1003 } 1004 } 1005 1006 /* 1007 * Iterate the routing table and locate the next hop. 1008 */ 1009 struct ieee80211_node * 1010 ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1011 const uint8_t dest[IEEE80211_ADDR_LEN]) 1012 { 1013 struct ieee80211_mesh_route *rt; 1014 1015 rt = ieee80211_mesh_rt_find(vap, dest); 1016 if (rt == NULL) 1017 return NULL; 1018 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1019 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1020 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1021 /* XXX stat */ 1022 return NULL; 1023 } 1024 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1025 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1026 if (rt == NULL) return NULL; 1027 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1028 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1029 "%s: meshgate !valid, flags 0x%x", __func__, 1030 rt->rt_flags); 1031 /* XXX stat */ 1032 return NULL; 1033 } 1034 } 1035 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1036 } 1037 1038 static void 1039 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1040 struct ieee80211_mesh_route *rt_gate) 1041 { 1042 struct ifnet *ifp = vap->iv_ifp; 1043 struct ieee80211com *ic = vap->iv_ic; 1044 struct ieee80211_node *ni; 1045 struct ether_header *eh; 1046 int error; 1047 1048 IEEE80211_TX_UNLOCK_ASSERT(ic); 1049 1050 eh = mtod(m, struct ether_header *); 1051 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1052 if (ni == NULL) { 1053 ifp->if_oerrors++; 1054 m_freem(m); 1055 return; 1056 } 1057 1058 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 1059 (m->m_flags & M_PWR_SAV) == 0) { 1060 /* 1061 * Station in power save mode; pass the frame 1062 * to the 802.11 layer and continue. We'll get 1063 * the frame back when the time is right. 1064 * XXX lose WDS vap linkage? 1065 */ 1066 (void) ieee80211_pwrsave(ni, m); 1067 ieee80211_free_node(ni); 1068 return; 1069 } 1070 1071 /* calculate priority so drivers can find the tx queue */ 1072 if (ieee80211_classify(ni, m)) { 1073 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 1074 eh->ether_dhost, NULL, 1075 "%s", "classification failure"); 1076 vap->iv_stats.is_tx_classify++; 1077 ifp->if_oerrors++; 1078 m_freem(m); 1079 ieee80211_free_node(ni); 1080 return; 1081 } 1082 /* 1083 * Stash the node pointer. Note that we do this after 1084 * any call to ieee80211_dwds_mcast because that code 1085 * uses any existing value for rcvif to identify the 1086 * interface it (might have been) received on. 1087 */ 1088 m->m_pkthdr.rcvif = (void *)ni; 1089 1090 BPF_MTAP(ifp, m); /* 802.3 tx */ 1091 1092 /* 1093 * Check if A-MPDU tx aggregation is setup or if we 1094 * should try to enable it. The sta must be associated 1095 * with HT and A-MPDU enabled for use. When the policy 1096 * routine decides we should enable A-MPDU we issue an 1097 * ADDBA request and wait for a reply. The frame being 1098 * encapsulated will go out w/o using A-MPDU, or possibly 1099 * it might be collected by the driver and held/retransmit. 1100 * The default ic_ampdu_enable routine handles staggering 1101 * ADDBA requests in case the receiver NAK's us or we are 1102 * otherwise unable to establish a BA stream. 1103 */ 1104 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) && 1105 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX) && 1106 (m->m_flags & M_EAPOL) == 0) { 1107 int tid = WME_AC_TO_TID(M_WME_GETAC(m)); 1108 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid]; 1109 1110 ieee80211_txampdu_count_packet(tap); 1111 if (IEEE80211_AMPDU_RUNNING(tap)) { 1112 /* 1113 * Operational, mark frame for aggregation. 1114 * 1115 * XXX do tx aggregation here 1116 */ 1117 m->m_flags |= M_AMPDU_MPDU; 1118 } else if (!IEEE80211_AMPDU_REQUESTED(tap) && 1119 ic->ic_ampdu_enable(ni, tap)) { 1120 /* 1121 * Not negotiated yet, request service. 1122 */ 1123 ieee80211_ampdu_request(ni, tap); 1124 /* XXX hold frame for reply? */ 1125 } 1126 } 1127 #ifdef IEEE80211_SUPPORT_SUPERG 1128 else if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF)) { 1129 m = ieee80211_ff_check(ni, m); 1130 if (m == NULL) { 1131 /* NB: any ni ref held on stageq */ 1132 return; 1133 } 1134 } 1135 #endif /* IEEE80211_SUPPORT_SUPERG */ 1136 1137 IEEE80211_TX_LOCK(ic); 1138 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 1139 /* 1140 * Encapsulate the packet in prep for transmission. 1141 */ 1142 m = ieee80211_encap(vap, ni, m); 1143 if (m == NULL) { 1144 /* NB: stat+msg handled in ieee80211_encap */ 1145 ieee80211_free_node(ni); 1146 return; 1147 } 1148 } 1149 error = ieee80211_parent_transmit(ic, m); 1150 IEEE80211_TX_UNLOCK(ic); 1151 if (error != 0) { 1152 ieee80211_free_node(ni); 1153 } else { 1154 ifp->if_opackets++; 1155 } 1156 ic->ic_lastdata = ticks; 1157 } 1158 1159 /* 1160 * Forward the queued frames to known valid mesh gates. 1161 * Assume destination to be outside the MBSS (i.e. proxy entry), 1162 * If no valid mesh gates are known silently discard queued frames. 1163 * After transmitting frames to all known valid mesh gates, this route 1164 * will be marked invalid, and a new path discovery will happen in the hopes 1165 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1166 */ 1167 void 1168 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1169 struct ieee80211_mesh_route *rt_dest) 1170 { 1171 struct ieee80211com *ic = vap->iv_ic; 1172 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1173 struct ieee80211_mesh_route *rt_gate; 1174 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1175 struct mbuf *m, *mcopy, *next; 1176 1177 IEEE80211_TX_UNLOCK_ASSERT(ic); 1178 1179 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1180 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1181 1182 /* XXX: send to more than one valid mash gate */ 1183 MESH_RT_LOCK(ms); 1184 1185 m = ieee80211_ageq_remove(&ic->ic_stageq, 1186 (struct ieee80211_node *)(uintptr_t) 1187 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1188 1189 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1190 rt_gate = gr->gr_route; 1191 if (rt_gate == NULL) { 1192 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1193 rt_dest->rt_dest, 1194 "mesh gate with no path %6D", 1195 gr->gr_addr, ":"); 1196 continue; 1197 } 1198 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1199 continue; 1200 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1201 ("route not marked as a mesh gate")); 1202 KASSERT((rt_gate->rt_flags & 1203 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1204 ("found mesh gate that is also marked porxy")); 1205 /* 1206 * convert route to a proxy route gated by the current 1207 * mesh gate, this is needed so encap can built data 1208 * frame with correct address. 1209 */ 1210 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1211 IEEE80211_MESHRT_FLAGS_VALID; 1212 rt_dest->rt_ext_seq = 1; /* random value */ 1213 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1214 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1215 rt_dest->rt_metric = rt_gate->rt_metric; 1216 rt_dest->rt_nhops = rt_gate->rt_nhops; 1217 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1218 MESH_RT_UNLOCK(ms); 1219 /* XXX: lock?? */ 1220 mcopy = m_dup(m, M_NOWAIT); 1221 for (; mcopy != NULL; mcopy = next) { 1222 next = mcopy->m_nextpkt; 1223 mcopy->m_nextpkt = NULL; 1224 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1225 rt_dest->rt_dest, 1226 "flush queued frame %p len %d", mcopy, 1227 mcopy->m_pkthdr.len); 1228 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1229 } 1230 MESH_RT_LOCK(ms); 1231 } 1232 rt_dest->rt_flags = 0; /* Mark invalid */ 1233 m_freem(m); 1234 MESH_RT_UNLOCK(ms); 1235 } 1236 1237 /* 1238 * Forward the specified frame. 1239 * Decrement the TTL and set TA to our MAC address. 1240 */ 1241 static void 1242 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1243 const struct ieee80211_meshcntl *mc) 1244 { 1245 struct ieee80211com *ic = vap->iv_ic; 1246 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1247 struct ifnet *ifp = vap->iv_ifp; 1248 const struct ieee80211_frame *wh = 1249 mtod(m, const struct ieee80211_frame *); 1250 struct mbuf *mcopy; 1251 struct ieee80211_meshcntl *mccopy; 1252 struct ieee80211_frame *whcopy; 1253 struct ieee80211_node *ni; 1254 int err; 1255 1256 /* This is called from the RX path - don't hold this lock */ 1257 IEEE80211_TX_UNLOCK_ASSERT(ic); 1258 1259 /* 1260 * mesh ttl of 1 means we are the last one receving it, 1261 * according to amendment we decrement and then check if 1262 * 0, if so we dont forward. 1263 */ 1264 if (mc->mc_ttl < 1) { 1265 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1266 "%s", "frame not fwd'd, ttl 1"); 1267 vap->iv_stats.is_mesh_fwd_ttl++; 1268 return; 1269 } 1270 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1271 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1272 "%s", "frame not fwd'd, fwding disabled"); 1273 vap->iv_stats.is_mesh_fwd_disabled++; 1274 return; 1275 } 1276 mcopy = m_dup(m, M_NOWAIT); 1277 if (mcopy == NULL) { 1278 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1279 "%s", "frame not fwd'd, cannot dup"); 1280 vap->iv_stats.is_mesh_fwd_nobuf++; 1281 ifp->if_oerrors++; 1282 return; 1283 } 1284 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1285 sizeof(struct ieee80211_meshcntl)); 1286 if (mcopy == NULL) { 1287 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1288 "%s", "frame not fwd'd, too short"); 1289 vap->iv_stats.is_mesh_fwd_tooshort++; 1290 ifp->if_oerrors++; 1291 m_freem(mcopy); 1292 return; 1293 } 1294 whcopy = mtod(mcopy, struct ieee80211_frame *); 1295 mccopy = (struct ieee80211_meshcntl *) 1296 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1297 /* XXX clear other bits? */ 1298 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1299 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1300 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1301 ni = ieee80211_ref_node(vap->iv_bss); 1302 mcopy->m_flags |= M_MCAST; 1303 } else { 1304 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1305 if (ni == NULL) { 1306 /* 1307 * [Optional] any of the following three actions: 1308 * o silently discard 1309 * o trigger a path discovery 1310 * o inform TA that meshDA is unknown. 1311 */ 1312 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1313 "%s", "frame not fwd'd, no path"); 1314 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1315 IEEE80211_REASON_MESH_PERR_NO_FI); 1316 vap->iv_stats.is_mesh_fwd_nopath++; 1317 m_freem(mcopy); 1318 return; 1319 } 1320 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1321 } 1322 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1323 mccopy->mc_ttl--; 1324 1325 /* XXX calculate priority so drivers can find the tx queue */ 1326 M_WME_SETAC(mcopy, WME_AC_BE); 1327 1328 /* XXX do we know m_nextpkt is NULL? */ 1329 mcopy->m_pkthdr.rcvif = (void *) ni; 1330 1331 /* 1332 * XXX this bypasses all of the VAP TX handling; it passes frames 1333 * directly to the parent interface. 1334 * 1335 * Because of this, there's no TX lock being held as there's no 1336 * encaps state being used. 1337 * 1338 * Doing a direct parent transmit may not be the correct thing 1339 * to do here; we'll have to re-think this soon. 1340 */ 1341 IEEE80211_TX_LOCK(ic); 1342 err = ieee80211_parent_transmit(ic, mcopy); 1343 IEEE80211_TX_UNLOCK(ic); 1344 if (err != 0) { 1345 /* NB: IFQ_HANDOFF reclaims mbuf */ 1346 ieee80211_free_node(ni); 1347 } else { 1348 ifp->if_opackets++; 1349 } 1350 } 1351 1352 static struct mbuf * 1353 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1354 { 1355 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1356 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1357 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1358 sizeof(struct ieee80211_meshcntl_ae10)]; 1359 const struct ieee80211_qosframe_addr4 *wh; 1360 const struct ieee80211_meshcntl_ae10 *mc; 1361 struct ether_header *eh; 1362 struct llc *llc; 1363 int ae; 1364 1365 if (m->m_len < hdrlen + sizeof(*llc) && 1366 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1367 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1368 "discard data frame: %s", "m_pullup failed"); 1369 vap->iv_stats.is_rx_tooshort++; 1370 return NULL; 1371 } 1372 memcpy(b, mtod(m, caddr_t), hdrlen); 1373 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1374 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1375 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1376 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1377 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1378 1379 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1380 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1381 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1382 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1383 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1384 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1385 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1386 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1387 llc = NULL; 1388 } else { 1389 m_adj(m, hdrlen - sizeof(*eh)); 1390 } 1391 eh = mtod(m, struct ether_header *); 1392 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1393 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1394 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1395 if (ae == IEEE80211_MESH_AE_00) { 1396 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1397 } else if (ae == IEEE80211_MESH_AE_01) { 1398 IEEE80211_ADDR_COPY(eh->ether_shost, 1399 MC01(mc)->mc_addr4); 1400 } else { 1401 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1402 (const struct ieee80211_frame *)wh, NULL, 1403 "bad AE %d", ae); 1404 vap->iv_stats.is_mesh_badae++; 1405 m_freem(m); 1406 return NULL; 1407 } 1408 } else { 1409 if (ae == IEEE80211_MESH_AE_00) { 1410 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1411 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1412 } else if (ae == IEEE80211_MESH_AE_10) { 1413 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1414 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1415 } else { 1416 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1417 (const struct ieee80211_frame *)wh, NULL, 1418 "bad AE %d", ae); 1419 vap->iv_stats.is_mesh_badae++; 1420 m_freem(m); 1421 return NULL; 1422 } 1423 } 1424 #ifndef __NO_STRICT_ALIGNMENT 1425 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1426 m = ieee80211_realign(vap, m, sizeof(*eh)); 1427 if (m == NULL) 1428 return NULL; 1429 } 1430 #endif /* !__NO_STRICT_ALIGNMENT */ 1431 if (llc != NULL) { 1432 eh = mtod(m, struct ether_header *); 1433 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1434 } 1435 return m; 1436 #undef WDIR 1437 #undef MC01 1438 } 1439 1440 /* 1441 * Return non-zero if the unicast mesh data frame should be processed 1442 * locally. Frames that are not proxy'd have our address, otherwise 1443 * we need to consult the routing table to look for a proxy entry. 1444 */ 1445 static __inline int 1446 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1447 const struct ieee80211_meshcntl *mc) 1448 { 1449 int ae = mc->mc_flags & 3; 1450 1451 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1452 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1453 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1454 ("bad AE %d", ae)); 1455 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1456 const struct ieee80211_meshcntl_ae10 *mc10 = 1457 (const struct ieee80211_meshcntl_ae10 *) mc; 1458 struct ieee80211_mesh_route *rt = 1459 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1460 /* check for proxy route to ourself */ 1461 return (rt != NULL && 1462 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1463 } else /* ucast w/o proxy */ 1464 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1465 } 1466 1467 /* 1468 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1469 * > 0 means we have forwarded data and no need to process locally 1470 * == 0 means we want to process locally (and we may have forwarded data 1471 * < 0 means there was an error and data should be discarded 1472 */ 1473 static int 1474 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1475 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1476 { 1477 struct ieee80211_qosframe_addr4 *qwh; 1478 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1479 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1480 1481 /* This is called from the RX path - don't hold this lock */ 1482 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1483 1484 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1485 1486 /* 1487 * TODO: 1488 * o verify addr2 is a legitimate transmitter 1489 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1490 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1491 */ 1492 1493 /* set lifetime of addr3 (meshDA) to initial value */ 1494 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1495 if (rt_meshda == NULL) { 1496 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1497 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1498 /* 1499 * [Optional] any of the following three actions: 1500 * o silently discard [X] 1501 * o trigger a path discovery [ ] 1502 * o inform TA that meshDA is unknown. [ ] 1503 */ 1504 /* XXX: stats */ 1505 return (-1); 1506 } 1507 1508 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1509 ms->ms_ppath->mpp_inact)); 1510 1511 /* set lifetime of addr4 (meshSA) to initial value */ 1512 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1513 KASSERT(rt_meshsa != NULL, ("no route")); 1514 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1515 ms->ms_ppath->mpp_inact)); 1516 1517 mesh_forward(vap, m, mc); 1518 return (1); /* dont process locally */ 1519 } 1520 1521 /* 1522 * Verifies transmitter, updates lifetime, precursor list and process data 1523 * locally, if data is proxy with AE = 10 it could mean data should go 1524 * on another mesh path or data should be forwarded to the DS. 1525 * 1526 * > 0 means we have forwarded data and no need to process locally 1527 * == 0 means we want to process locally (and we may have forwarded data 1528 * < 0 means there was an error and data should be discarded 1529 */ 1530 static int 1531 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1532 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1533 { 1534 struct ieee80211_qosframe_addr4 *qwh; 1535 const struct ieee80211_meshcntl_ae10 *mc10; 1536 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1537 struct ieee80211_mesh_route *rt; 1538 int ae; 1539 1540 /* This is called from the RX path - don't hold this lock */ 1541 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1542 1543 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1544 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1545 1546 /* 1547 * TODO: 1548 * o verify addr2 is a legitimate transmitter 1549 * o lifetime of precursor entry is max(init, curr) 1550 */ 1551 1552 /* set lifetime of addr4 (meshSA) to initial value */ 1553 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1554 KASSERT(rt != NULL, ("no route")); 1555 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1556 rt = NULL; 1557 1558 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1559 KASSERT(ae == IEEE80211_MESH_AE_00 || 1560 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1561 if (ae == IEEE80211_MESH_AE_10) { 1562 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1563 return (0); /* process locally */ 1564 } 1565 1566 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1567 if (rt != NULL && 1568 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1569 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1570 /* 1571 * Forward on another mesh-path, according to 1572 * amendment as specified in 9.32.4.1 1573 */ 1574 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1575 mesh_forward(vap, m, 1576 (const struct ieee80211_meshcntl *)mc10); 1577 return (1); /* dont process locally */ 1578 } 1579 /* 1580 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1581 * addressed according to 13.11.3.2. 1582 */ 1583 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1584 "forward frame to DS, SA(%6D) DA(%6D)", 1585 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1586 } 1587 return (0); /* process locally */ 1588 } 1589 1590 /* 1591 * Try to forward the group addressed data on to other mesh STAs, and 1592 * also to the DS. 1593 * 1594 * > 0 means we have forwarded data and no need to process locally 1595 * == 0 means we want to process locally (and we may have forwarded data 1596 * < 0 means there was an error and data should be discarded 1597 */ 1598 static int 1599 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1600 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1601 { 1602 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1603 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1604 1605 /* This is called from the RX path - don't hold this lock */ 1606 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1607 1608 mesh_forward(vap, m, mc); 1609 1610 if(mc->mc_ttl > 0) { 1611 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1612 /* 1613 * Forward of MSDUs from the MBSS to DS group addressed 1614 * (according to 13.11.3.2) 1615 * This happens by delivering the packet, and a bridge 1616 * will sent it on another port member. 1617 */ 1618 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1619 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1620 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1621 MC01(mc)->mc_addr4, "%s", 1622 "forward from MBSS to the DS"); 1623 } 1624 } 1625 return (0); /* process locally */ 1626 #undef MC01 1627 } 1628 1629 static int 1630 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 1631 { 1632 #define HAS_SEQ(type) ((type & 0x4) == 0) 1633 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1634 #define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1635 struct ieee80211vap *vap = ni->ni_vap; 1636 struct ieee80211com *ic = ni->ni_ic; 1637 struct ifnet *ifp = vap->iv_ifp; 1638 struct ieee80211_frame *wh; 1639 const struct ieee80211_meshcntl *mc; 1640 int hdrspace, meshdrlen, need_tap, error; 1641 uint8_t dir, type, subtype, ae; 1642 uint32_t seq; 1643 const uint8_t *addr; 1644 uint8_t qos[2]; 1645 ieee80211_seq rxseq; 1646 1647 KASSERT(ni != NULL, ("null node")); 1648 ni->ni_inact = ni->ni_inact_reload; 1649 1650 need_tap = 1; /* mbuf need to be tapped. */ 1651 type = -1; /* undefined */ 1652 1653 /* This is called from the RX path - don't hold this lock */ 1654 IEEE80211_TX_UNLOCK_ASSERT(ic); 1655 1656 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1657 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1658 ni->ni_macaddr, NULL, 1659 "too short (1): len %u", m->m_pkthdr.len); 1660 vap->iv_stats.is_rx_tooshort++; 1661 goto out; 1662 } 1663 /* 1664 * Bit of a cheat here, we use a pointer for a 3-address 1665 * frame format but don't reference fields past outside 1666 * ieee80211_frame_min w/o first validating the data is 1667 * present. 1668 */ 1669 wh = mtod(m, struct ieee80211_frame *); 1670 1671 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1672 IEEE80211_FC0_VERSION_0) { 1673 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1674 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1675 vap->iv_stats.is_rx_badversion++; 1676 goto err; 1677 } 1678 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1679 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1680 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1681 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1682 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1683 ni->ni_noise = nf; 1684 if (HAS_SEQ(type)) { 1685 uint8_t tid = ieee80211_gettid(wh); 1686 1687 if (IEEE80211_QOS_HAS_SEQ(wh) && 1688 TID_TO_WME_AC(tid) >= WME_AC_VI) 1689 ic->ic_wme.wme_hipri_traffic++; 1690 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1691 if (! ieee80211_check_rxseq(ni, wh)) { 1692 /* duplicate, discard */ 1693 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1694 wh->i_addr1, "duplicate", 1695 "seqno <%u,%u> fragno <%u,%u> tid %u", 1696 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1697 ni->ni_rxseqs[tid] >> 1698 IEEE80211_SEQ_SEQ_SHIFT, 1699 rxseq & IEEE80211_SEQ_FRAG_MASK, 1700 ni->ni_rxseqs[tid] & 1701 IEEE80211_SEQ_FRAG_MASK, 1702 tid); 1703 vap->iv_stats.is_rx_dup++; 1704 IEEE80211_NODE_STAT(ni, rx_dup); 1705 goto out; 1706 } 1707 ni->ni_rxseqs[tid] = rxseq; 1708 } 1709 } 1710 #ifdef IEEE80211_DEBUG 1711 /* 1712 * It's easier, but too expensive, to simulate different mesh 1713 * topologies by consulting the ACL policy very early, so do this 1714 * only under DEBUG. 1715 * 1716 * NB: this check is also done upon peering link initiation. 1717 */ 1718 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1719 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1720 wh, NULL, "%s", "disallowed by ACL"); 1721 vap->iv_stats.is_rx_acl++; 1722 goto out; 1723 } 1724 #endif 1725 switch (type) { 1726 case IEEE80211_FC0_TYPE_DATA: 1727 if (ni == vap->iv_bss) 1728 goto out; 1729 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1730 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1731 ni->ni_macaddr, NULL, 1732 "peer link not yet established (%d)", 1733 ni->ni_mlstate); 1734 vap->iv_stats.is_mesh_nolink++; 1735 goto out; 1736 } 1737 if (dir != IEEE80211_FC1_DIR_FROMDS && 1738 dir != IEEE80211_FC1_DIR_DSTODS) { 1739 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1740 wh, "data", "incorrect dir 0x%x", dir); 1741 vap->iv_stats.is_rx_wrongdir++; 1742 goto err; 1743 } 1744 1745 /* All Mesh data frames are QoS subtype */ 1746 if (!HAS_SEQ(type)) { 1747 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1748 wh, "data", "incorrect subtype 0x%x", subtype); 1749 vap->iv_stats.is_rx_badsubtype++; 1750 goto err; 1751 } 1752 1753 /* 1754 * Next up, any fragmentation. 1755 * XXX: we defrag before we even try to forward, 1756 * Mesh Control field is not present in sub-sequent 1757 * fragmented frames. This is in contrast to Draft 4.0. 1758 */ 1759 hdrspace = ieee80211_hdrspace(ic, wh); 1760 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1761 m = ieee80211_defrag(ni, m, hdrspace); 1762 if (m == NULL) { 1763 /* Fragment dropped or frame not complete yet */ 1764 goto out; 1765 } 1766 } 1767 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1768 1769 /* 1770 * Now we have a complete Mesh Data frame. 1771 */ 1772 1773 /* 1774 * Only fromDStoDS data frames use 4 address qos frames 1775 * as specified in amendment. Otherwise addr4 is located 1776 * in the Mesh Control field and a 3 address qos frame 1777 * is used. 1778 */ 1779 if (IEEE80211_IS_DSTODS(wh)) 1780 *(uint16_t *)qos = *(uint16_t *) 1781 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1782 else 1783 *(uint16_t *)qos = *(uint16_t *) 1784 ((struct ieee80211_qosframe *)wh)->i_qos; 1785 1786 /* 1787 * NB: The mesh STA sets the Mesh Control Present 1788 * subfield to 1 in the Mesh Data frame containing 1789 * an unfragmented MSDU, an A-MSDU, or the first 1790 * fragment of an MSDU. 1791 * After defrag it should always be present. 1792 */ 1793 if (!(qos[1] & IEEE80211_QOS_MC)) { 1794 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1795 ni->ni_macaddr, NULL, 1796 "%s", "Mesh control field not present"); 1797 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1798 goto err; 1799 } 1800 1801 /* pull up enough to get to the mesh control */ 1802 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1803 (m = m_pullup(m, hdrspace + 1804 sizeof(struct ieee80211_meshcntl))) == NULL) { 1805 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1806 ni->ni_macaddr, NULL, 1807 "data too short: expecting %u", hdrspace); 1808 vap->iv_stats.is_rx_tooshort++; 1809 goto out; /* XXX */ 1810 } 1811 /* 1812 * Now calculate the full extent of the headers. Note 1813 * mesh_decap will pull up anything we didn't get 1814 * above when it strips the 802.11 headers. 1815 */ 1816 mc = (const struct ieee80211_meshcntl *) 1817 (mtod(m, const uint8_t *) + hdrspace); 1818 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1819 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1820 ae * IEEE80211_ADDR_LEN; 1821 hdrspace += meshdrlen; 1822 1823 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1824 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1825 (m->m_len < hdrspace) && 1826 ((m = m_pullup(m, hdrspace)) == NULL)) { 1827 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1828 ni->ni_macaddr, NULL, 1829 "data too short: expecting %u", hdrspace); 1830 vap->iv_stats.is_rx_tooshort++; 1831 goto out; /* XXX */ 1832 } 1833 /* XXX: are we sure there is no reallocating after m_pullup? */ 1834 1835 seq = LE_READ_4(mc->mc_seq); 1836 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1837 addr = wh->i_addr3; 1838 else if (ae == IEEE80211_MESH_AE_01) 1839 addr = MC01(mc)->mc_addr4; 1840 else 1841 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1842 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1843 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1844 addr, "data", "%s", "not to me"); 1845 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1846 goto out; 1847 } 1848 if (mesh_checkpseq(vap, addr, seq) != 0) { 1849 vap->iv_stats.is_rx_dup++; 1850 goto out; 1851 } 1852 1853 /* This code "routes" the frame to the right control path */ 1854 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1855 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1856 error = 1857 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1858 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1859 error = mesh_recv_group_data(vap, m, wh, mc); 1860 else 1861 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1862 wh, mc); 1863 } else 1864 error = mesh_recv_group_data(vap, m, wh, mc); 1865 if (error < 0) 1866 goto err; 1867 else if (error > 0) 1868 goto out; 1869 1870 if (ieee80211_radiotap_active_vap(vap)) 1871 ieee80211_radiotap_rx(vap, m); 1872 need_tap = 0; 1873 1874 /* 1875 * Finally, strip the 802.11 header. 1876 */ 1877 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1878 if (m == NULL) { 1879 /* XXX mask bit to check for both */ 1880 /* don't count Null data frames as errors */ 1881 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1882 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1883 goto out; 1884 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1885 ni->ni_macaddr, "data", "%s", "decap error"); 1886 vap->iv_stats.is_rx_decap++; 1887 IEEE80211_NODE_STAT(ni, rx_decap); 1888 goto err; 1889 } 1890 if (qos[0] & IEEE80211_QOS_AMSDU) { 1891 m = ieee80211_decap_amsdu(ni, m); 1892 if (m == NULL) 1893 return IEEE80211_FC0_TYPE_DATA; 1894 } 1895 ieee80211_deliver_data(vap, ni, m); 1896 return type; 1897 case IEEE80211_FC0_TYPE_MGT: 1898 vap->iv_stats.is_rx_mgmt++; 1899 IEEE80211_NODE_STAT(ni, rx_mgmt); 1900 if (dir != IEEE80211_FC1_DIR_NODS) { 1901 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1902 wh, "mgt", "incorrect dir 0x%x", dir); 1903 vap->iv_stats.is_rx_wrongdir++; 1904 goto err; 1905 } 1906 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1907 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1908 ni->ni_macaddr, "mgt", "too short: len %u", 1909 m->m_pkthdr.len); 1910 vap->iv_stats.is_rx_tooshort++; 1911 goto out; 1912 } 1913 #ifdef IEEE80211_DEBUG 1914 if ((ieee80211_msg_debug(vap) && 1915 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1916 ieee80211_msg_dumppkts(vap)) { 1917 if_printf(ifp, "received %s from %s rssi %d\n", 1918 ieee80211_mgt_subtype_name[subtype >> 1919 IEEE80211_FC0_SUBTYPE_SHIFT], 1920 ether_sprintf(wh->i_addr2), rssi); 1921 } 1922 #endif 1923 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1924 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1925 wh, NULL, "%s", "WEP set but not permitted"); 1926 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1927 goto out; 1928 } 1929 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1930 goto out; 1931 case IEEE80211_FC0_TYPE_CTL: 1932 vap->iv_stats.is_rx_ctl++; 1933 IEEE80211_NODE_STAT(ni, rx_ctrl); 1934 goto out; 1935 default: 1936 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1937 wh, "bad", "frame type 0x%x", type); 1938 /* should not come here */ 1939 break; 1940 } 1941 err: 1942 ifp->if_ierrors++; 1943 out: 1944 if (m != NULL) { 1945 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1946 ieee80211_radiotap_rx(vap, m); 1947 m_freem(m); 1948 } 1949 return type; 1950 #undef HAS_SEQ 1951 #undef MC01 1952 #undef MC10 1953 } 1954 1955 static void 1956 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1957 int rssi, int nf) 1958 { 1959 struct ieee80211vap *vap = ni->ni_vap; 1960 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1961 struct ieee80211com *ic = ni->ni_ic; 1962 struct ieee80211_frame *wh; 1963 struct ieee80211_mesh_route *rt; 1964 uint8_t *frm, *efrm; 1965 1966 wh = mtod(m0, struct ieee80211_frame *); 1967 frm = (uint8_t *)&wh[1]; 1968 efrm = mtod(m0, uint8_t *) + m0->m_len; 1969 switch (subtype) { 1970 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1971 case IEEE80211_FC0_SUBTYPE_BEACON: 1972 { 1973 struct ieee80211_scanparams scan; 1974 /* 1975 * We process beacon/probe response 1976 * frames to discover neighbors. 1977 */ 1978 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1979 return; 1980 /* 1981 * Count frame now that we know it's to be processed. 1982 */ 1983 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1984 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1985 IEEE80211_NODE_STAT(ni, rx_beacons); 1986 } else 1987 IEEE80211_NODE_STAT(ni, rx_proberesp); 1988 /* 1989 * If scanning, just pass information to the scan module. 1990 */ 1991 if (ic->ic_flags & IEEE80211_F_SCAN) { 1992 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1993 /* 1994 * Actively scanning a channel marked passive; 1995 * send a probe request now that we know there 1996 * is 802.11 traffic present. 1997 * 1998 * XXX check if the beacon we recv'd gives 1999 * us what we need and suppress the probe req 2000 */ 2001 ieee80211_probe_curchan(vap, 1); 2002 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 2003 } 2004 ieee80211_add_scan(vap, &scan, wh, 2005 subtype, rssi, nf); 2006 return; 2007 } 2008 2009 /* The rest of this code assumes we are running */ 2010 if (vap->iv_state != IEEE80211_S_RUN) 2011 return; 2012 /* 2013 * Ignore non-mesh STAs. 2014 */ 2015 if ((scan.capinfo & 2016 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 2017 scan.meshid == NULL || scan.meshconf == NULL) { 2018 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2019 wh, "beacon", "%s", "not a mesh sta"); 2020 vap->iv_stats.is_mesh_wrongmesh++; 2021 return; 2022 } 2023 /* 2024 * Ignore STAs for other mesh networks. 2025 */ 2026 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 2027 mesh_verify_meshconf(vap, scan.meshconf)) { 2028 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2029 wh, "beacon", "%s", "not for our mesh"); 2030 vap->iv_stats.is_mesh_wrongmesh++; 2031 return; 2032 } 2033 /* 2034 * Peer only based on the current ACL policy. 2035 */ 2036 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 2037 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 2038 wh, NULL, "%s", "disallowed by ACL"); 2039 vap->iv_stats.is_rx_acl++; 2040 return; 2041 } 2042 /* 2043 * Do neighbor discovery. 2044 */ 2045 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 2046 /* 2047 * Create a new entry in the neighbor table. 2048 */ 2049 ni = ieee80211_add_neighbor(vap, wh, &scan); 2050 } 2051 /* 2052 * Automatically peer with discovered nodes if possible. 2053 */ 2054 if (ni != vap->iv_bss && 2055 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 2056 switch (ni->ni_mlstate) { 2057 case IEEE80211_NODE_MESH_IDLE: 2058 { 2059 uint16_t args[1]; 2060 2061 /* Wait for backoff callout to reset counter */ 2062 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 2063 return; 2064 2065 ni->ni_mlpid = mesh_generateid(vap); 2066 if (ni->ni_mlpid == 0) 2067 return; 2068 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 2069 args[0] = ni->ni_mlpid; 2070 ieee80211_send_action(ni, 2071 IEEE80211_ACTION_CAT_SELF_PROT, 2072 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2073 ni->ni_mlrcnt = 0; 2074 mesh_peer_timeout_setup(ni); 2075 break; 2076 } 2077 case IEEE80211_NODE_MESH_ESTABLISHED: 2078 { 2079 /* 2080 * Valid beacon from a peer mesh STA 2081 * bump TA lifetime 2082 */ 2083 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 2084 if(rt != NULL) { 2085 ieee80211_mesh_rt_update(rt, 2086 ticks_to_msecs( 2087 ms->ms_ppath->mpp_inact)); 2088 } 2089 break; 2090 } 2091 default: 2092 break; /* ignore */ 2093 } 2094 } 2095 break; 2096 } 2097 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2098 { 2099 uint8_t *ssid, *meshid, *rates, *xrates; 2100 uint8_t *sfrm; 2101 2102 if (vap->iv_state != IEEE80211_S_RUN) { 2103 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2104 wh, NULL, "wrong state %s", 2105 ieee80211_state_name[vap->iv_state]); 2106 vap->iv_stats.is_rx_mgtdiscard++; 2107 return; 2108 } 2109 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 2110 /* frame must be directed */ 2111 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2112 wh, NULL, "%s", "not unicast"); 2113 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 2114 return; 2115 } 2116 /* 2117 * prreq frame format 2118 * [tlv] ssid 2119 * [tlv] supported rates 2120 * [tlv] extended supported rates 2121 * [tlv] mesh id 2122 */ 2123 ssid = meshid = rates = xrates = NULL; 2124 sfrm = frm; 2125 while (efrm - frm > 1) { 2126 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2127 switch (*frm) { 2128 case IEEE80211_ELEMID_SSID: 2129 ssid = frm; 2130 break; 2131 case IEEE80211_ELEMID_RATES: 2132 rates = frm; 2133 break; 2134 case IEEE80211_ELEMID_XRATES: 2135 xrates = frm; 2136 break; 2137 case IEEE80211_ELEMID_MESHID: 2138 meshid = frm; 2139 break; 2140 } 2141 frm += frm[1] + 2; 2142 } 2143 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2144 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2145 if (xrates != NULL) 2146 IEEE80211_VERIFY_ELEMENT(xrates, 2147 IEEE80211_RATE_MAXSIZE - rates[1], return); 2148 if (meshid != NULL) { 2149 IEEE80211_VERIFY_ELEMENT(meshid, 2150 IEEE80211_MESHID_LEN, return); 2151 /* NB: meshid, not ssid */ 2152 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2153 } 2154 2155 /* XXX find a better class or define it's own */ 2156 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2157 "%s", "recv probe req"); 2158 /* 2159 * Some legacy 11b clients cannot hack a complete 2160 * probe response frame. When the request includes 2161 * only a bare-bones rate set, communicate this to 2162 * the transmit side. 2163 */ 2164 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2165 break; 2166 } 2167 2168 case IEEE80211_FC0_SUBTYPE_ACTION: 2169 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2170 if (ni == vap->iv_bss) { 2171 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2172 wh, NULL, "%s", "unknown node"); 2173 vap->iv_stats.is_rx_mgtdiscard++; 2174 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2175 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2176 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2177 wh, NULL, "%s", "not for us"); 2178 vap->iv_stats.is_rx_mgtdiscard++; 2179 } else if (vap->iv_state != IEEE80211_S_RUN) { 2180 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2181 wh, NULL, "wrong state %s", 2182 ieee80211_state_name[vap->iv_state]); 2183 vap->iv_stats.is_rx_mgtdiscard++; 2184 } else { 2185 if (ieee80211_parse_action(ni, m0) == 0) 2186 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2187 } 2188 break; 2189 2190 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2191 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2192 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2193 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2194 case IEEE80211_FC0_SUBTYPE_ATIM: 2195 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2196 case IEEE80211_FC0_SUBTYPE_AUTH: 2197 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2198 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2199 wh, NULL, "%s", "not handled"); 2200 vap->iv_stats.is_rx_mgtdiscard++; 2201 break; 2202 2203 default: 2204 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2205 wh, "mgt", "subtype 0x%x not handled", subtype); 2206 vap->iv_stats.is_rx_badsubtype++; 2207 break; 2208 } 2209 } 2210 2211 static void 2212 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2213 { 2214 2215 switch (subtype) { 2216 case IEEE80211_FC0_SUBTYPE_BAR: 2217 ieee80211_recv_bar(ni, m); 2218 break; 2219 } 2220 } 2221 2222 /* 2223 * Parse meshpeering action ie's for MPM frames 2224 */ 2225 static const struct ieee80211_meshpeer_ie * 2226 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2227 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2228 const uint8_t *frm, const uint8_t *efrm, 2229 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2230 { 2231 struct ieee80211vap *vap = ni->ni_vap; 2232 const struct ieee80211_meshpeer_ie *mpie; 2233 uint16_t args[3]; 2234 const uint8_t *meshid, *meshconf, *meshpeer; 2235 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2236 2237 meshid = meshconf = meshpeer = NULL; 2238 while (efrm - frm > 1) { 2239 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2240 switch (*frm) { 2241 case IEEE80211_ELEMID_MESHID: 2242 meshid = frm; 2243 break; 2244 case IEEE80211_ELEMID_MESHCONF: 2245 meshconf = frm; 2246 break; 2247 case IEEE80211_ELEMID_MESHPEER: 2248 meshpeer = frm; 2249 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2250 memset(mp, 0, sizeof(*mp)); 2251 mp->peer_len = mpie->peer_len; 2252 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 2253 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 2254 switch (subtype) { 2255 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2256 mp->peer_linkid = 2257 LE_READ_2(&mpie->peer_linkid); 2258 break; 2259 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2260 /* NB: peer link ID is optional */ 2261 if (mpie->peer_len == 2262 (IEEE80211_MPM_BASE_SZ + 2)) { 2263 mp->peer_linkid = 0; 2264 mp->peer_rcode = 2265 LE_READ_2(&mpie->peer_linkid); 2266 } else { 2267 mp->peer_linkid = 2268 LE_READ_2(&mpie->peer_linkid); 2269 mp->peer_rcode = 2270 LE_READ_2(&mpie->peer_rcode); 2271 } 2272 break; 2273 } 2274 break; 2275 } 2276 frm += frm[1] + 2; 2277 } 2278 2279 /* 2280 * Verify the contents of the frame. 2281 * If it fails validation, close the peer link. 2282 */ 2283 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2284 sendclose = 1; 2285 IEEE80211_DISCARD(vap, 2286 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2287 wh, NULL, "%s", "MPM validation failed"); 2288 } 2289 2290 /* If meshid is not the same reject any frames type. */ 2291 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2292 sendclose = 1; 2293 IEEE80211_DISCARD(vap, 2294 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2295 wh, NULL, "%s", "not for our mesh"); 2296 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2297 /* 2298 * Standard not clear about this, if we dont ignore 2299 * there will be an endless loop between nodes sending 2300 * CLOSE frames between each other with wrong meshid. 2301 * Discard and timers will bring FSM to IDLE state. 2302 */ 2303 return NULL; 2304 } 2305 } 2306 2307 /* 2308 * Close frames are accepted if meshid is the same. 2309 * Verify the other two types. 2310 */ 2311 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2312 mesh_verify_meshconf(vap, meshconf)) { 2313 sendclose = 1; 2314 IEEE80211_DISCARD(vap, 2315 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2316 wh, NULL, "%s", "configuration missmatch"); 2317 } 2318 2319 if (sendclose) { 2320 vap->iv_stats.is_rx_mgtdiscard++; 2321 switch (ni->ni_mlstate) { 2322 case IEEE80211_NODE_MESH_IDLE: 2323 case IEEE80211_NODE_MESH_ESTABLISHED: 2324 case IEEE80211_NODE_MESH_HOLDING: 2325 /* ignore */ 2326 break; 2327 case IEEE80211_NODE_MESH_OPENSNT: 2328 case IEEE80211_NODE_MESH_OPENRCV: 2329 case IEEE80211_NODE_MESH_CONFIRMRCV: 2330 args[0] = ni->ni_mlpid; 2331 args[1] = ni->ni_mllid; 2332 /* Reason codes for rejection */ 2333 switch (subtype) { 2334 case IEEE80211_ACTION_MESHPEERING_OPEN: 2335 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2336 break; 2337 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2338 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2339 break; 2340 } 2341 ieee80211_send_action(ni, 2342 IEEE80211_ACTION_CAT_SELF_PROT, 2343 IEEE80211_ACTION_MESHPEERING_CLOSE, 2344 args); 2345 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2346 mesh_peer_timeout_setup(ni); 2347 break; 2348 } 2349 return NULL; 2350 } 2351 2352 return (const struct ieee80211_meshpeer_ie *) mp; 2353 } 2354 2355 static int 2356 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2357 const struct ieee80211_frame *wh, 2358 const uint8_t *frm, const uint8_t *efrm) 2359 { 2360 struct ieee80211vap *vap = ni->ni_vap; 2361 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2362 struct ieee80211_meshpeer_ie ie; 2363 const struct ieee80211_meshpeer_ie *meshpeer; 2364 uint16_t args[3]; 2365 2366 /* +2+2 for action + code + capabilites */ 2367 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2368 IEEE80211_ACTION_MESHPEERING_OPEN); 2369 if (meshpeer == NULL) { 2370 return 0; 2371 } 2372 2373 /* XXX move up */ 2374 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2375 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2376 2377 switch (ni->ni_mlstate) { 2378 case IEEE80211_NODE_MESH_IDLE: 2379 /* Reject open request if reached our maximum neighbor count */ 2380 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2381 args[0] = meshpeer->peer_llinkid; 2382 args[1] = 0; 2383 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2384 ieee80211_send_action(ni, 2385 IEEE80211_ACTION_CAT_SELF_PROT, 2386 IEEE80211_ACTION_MESHPEERING_CLOSE, 2387 args); 2388 /* stay in IDLE state */ 2389 return (0); 2390 } 2391 /* Open frame accepted */ 2392 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2393 ni->ni_mllid = meshpeer->peer_llinkid; 2394 ni->ni_mlpid = mesh_generateid(vap); 2395 if (ni->ni_mlpid == 0) 2396 return 0; /* XXX */ 2397 args[0] = ni->ni_mlpid; 2398 /* Announce we're open too... */ 2399 ieee80211_send_action(ni, 2400 IEEE80211_ACTION_CAT_SELF_PROT, 2401 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2402 /* ...and confirm the link. */ 2403 args[0] = ni->ni_mlpid; 2404 args[1] = ni->ni_mllid; 2405 ieee80211_send_action(ni, 2406 IEEE80211_ACTION_CAT_SELF_PROT, 2407 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2408 args); 2409 mesh_peer_timeout_setup(ni); 2410 break; 2411 case IEEE80211_NODE_MESH_OPENRCV: 2412 /* Wrong Link ID */ 2413 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2414 args[0] = ni->ni_mllid; 2415 args[1] = ni->ni_mlpid; 2416 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2417 ieee80211_send_action(ni, 2418 IEEE80211_ACTION_CAT_SELF_PROT, 2419 IEEE80211_ACTION_MESHPEERING_CLOSE, 2420 args); 2421 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2422 mesh_peer_timeout_setup(ni); 2423 break; 2424 } 2425 /* Duplicate open, confirm again. */ 2426 args[0] = ni->ni_mlpid; 2427 args[1] = ni->ni_mllid; 2428 ieee80211_send_action(ni, 2429 IEEE80211_ACTION_CAT_SELF_PROT, 2430 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2431 args); 2432 break; 2433 case IEEE80211_NODE_MESH_OPENSNT: 2434 ni->ni_mllid = meshpeer->peer_llinkid; 2435 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2436 args[0] = ni->ni_mlpid; 2437 args[1] = ni->ni_mllid; 2438 ieee80211_send_action(ni, 2439 IEEE80211_ACTION_CAT_SELF_PROT, 2440 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2441 args); 2442 /* NB: don't setup/clear any timeout */ 2443 break; 2444 case IEEE80211_NODE_MESH_CONFIRMRCV: 2445 if (ni->ni_mlpid != meshpeer->peer_linkid || 2446 ni->ni_mllid != meshpeer->peer_llinkid) { 2447 args[0] = ni->ni_mlpid; 2448 args[1] = ni->ni_mllid; 2449 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2450 ieee80211_send_action(ni, 2451 IEEE80211_ACTION_CAT_SELF_PROT, 2452 IEEE80211_ACTION_MESHPEERING_CLOSE, 2453 args); 2454 mesh_linkchange(ni, 2455 IEEE80211_NODE_MESH_HOLDING); 2456 mesh_peer_timeout_setup(ni); 2457 break; 2458 } 2459 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2460 ni->ni_mllid = meshpeer->peer_llinkid; 2461 args[0] = ni->ni_mlpid; 2462 args[1] = ni->ni_mllid; 2463 ieee80211_send_action(ni, 2464 IEEE80211_ACTION_CAT_SELF_PROT, 2465 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2466 args); 2467 mesh_peer_timeout_stop(ni); 2468 break; 2469 case IEEE80211_NODE_MESH_ESTABLISHED: 2470 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2471 args[0] = ni->ni_mllid; 2472 args[1] = ni->ni_mlpid; 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 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2479 mesh_peer_timeout_setup(ni); 2480 break; 2481 } 2482 args[0] = ni->ni_mlpid; 2483 args[1] = ni->ni_mllid; 2484 ieee80211_send_action(ni, 2485 IEEE80211_ACTION_CAT_SELF_PROT, 2486 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2487 args); 2488 break; 2489 case IEEE80211_NODE_MESH_HOLDING: 2490 args[0] = ni->ni_mlpid; 2491 args[1] = meshpeer->peer_llinkid; 2492 /* Standard not clear about what the reaason code should be */ 2493 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2494 ieee80211_send_action(ni, 2495 IEEE80211_ACTION_CAT_SELF_PROT, 2496 IEEE80211_ACTION_MESHPEERING_CLOSE, 2497 args); 2498 break; 2499 } 2500 return 0; 2501 } 2502 2503 static int 2504 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2505 const struct ieee80211_frame *wh, 2506 const uint8_t *frm, const uint8_t *efrm) 2507 { 2508 struct ieee80211vap *vap = ni->ni_vap; 2509 struct ieee80211_meshpeer_ie ie; 2510 const struct ieee80211_meshpeer_ie *meshpeer; 2511 uint16_t args[3]; 2512 2513 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2514 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2515 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2516 if (meshpeer == NULL) { 2517 return 0; 2518 } 2519 2520 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2521 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2522 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2523 2524 switch (ni->ni_mlstate) { 2525 case IEEE80211_NODE_MESH_OPENRCV: 2526 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2527 mesh_peer_timeout_stop(ni); 2528 break; 2529 case IEEE80211_NODE_MESH_OPENSNT: 2530 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2531 mesh_peer_timeout_setup(ni); 2532 break; 2533 case IEEE80211_NODE_MESH_HOLDING: 2534 args[0] = ni->ni_mlpid; 2535 args[1] = meshpeer->peer_llinkid; 2536 /* Standard not clear about what the reaason code should be */ 2537 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2538 ieee80211_send_action(ni, 2539 IEEE80211_ACTION_CAT_SELF_PROT, 2540 IEEE80211_ACTION_MESHPEERING_CLOSE, 2541 args); 2542 break; 2543 case IEEE80211_NODE_MESH_CONFIRMRCV: 2544 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2545 args[0] = ni->ni_mlpid; 2546 args[1] = ni->ni_mllid; 2547 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2548 ieee80211_send_action(ni, 2549 IEEE80211_ACTION_CAT_SELF_PROT, 2550 IEEE80211_ACTION_MESHPEERING_CLOSE, 2551 args); 2552 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2553 mesh_peer_timeout_setup(ni); 2554 } 2555 break; 2556 default: 2557 IEEE80211_DISCARD(vap, 2558 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2559 wh, NULL, "received confirm in invalid state %d", 2560 ni->ni_mlstate); 2561 vap->iv_stats.is_rx_mgtdiscard++; 2562 break; 2563 } 2564 return 0; 2565 } 2566 2567 static int 2568 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2569 const struct ieee80211_frame *wh, 2570 const uint8_t *frm, const uint8_t *efrm) 2571 { 2572 struct ieee80211_meshpeer_ie ie; 2573 const struct ieee80211_meshpeer_ie *meshpeer; 2574 uint16_t args[3]; 2575 2576 /* +2 for action + code */ 2577 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2578 IEEE80211_ACTION_MESHPEERING_CLOSE); 2579 if (meshpeer == NULL) { 2580 return 0; 2581 } 2582 2583 /* 2584 * XXX: check reason code, for example we could receive 2585 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2586 * to peer again. 2587 */ 2588 2589 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2590 ni, "%s", "recv PEER CLOSE"); 2591 2592 switch (ni->ni_mlstate) { 2593 case IEEE80211_NODE_MESH_IDLE: 2594 /* ignore */ 2595 break; 2596 case IEEE80211_NODE_MESH_OPENRCV: 2597 case IEEE80211_NODE_MESH_OPENSNT: 2598 case IEEE80211_NODE_MESH_CONFIRMRCV: 2599 case IEEE80211_NODE_MESH_ESTABLISHED: 2600 args[0] = ni->ni_mlpid; 2601 args[1] = ni->ni_mllid; 2602 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2603 ieee80211_send_action(ni, 2604 IEEE80211_ACTION_CAT_SELF_PROT, 2605 IEEE80211_ACTION_MESHPEERING_CLOSE, 2606 args); 2607 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2608 mesh_peer_timeout_setup(ni); 2609 break; 2610 case IEEE80211_NODE_MESH_HOLDING: 2611 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2612 mesh_peer_timeout_stop(ni); 2613 break; 2614 } 2615 return 0; 2616 } 2617 2618 /* 2619 * Link Metric handling. 2620 */ 2621 static int 2622 mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2623 const struct ieee80211_frame *wh, 2624 const uint8_t *frm, const uint8_t *efrm) 2625 { 2626 const struct ieee80211_meshlmetric_ie *ie = 2627 (const struct ieee80211_meshlmetric_ie *) 2628 (frm+2); /* action + code */ 2629 struct ieee80211_meshlmetric_ie lm_rep; 2630 2631 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2632 lm_rep.lm_flags = 0; 2633 lm_rep.lm_metric = mesh_airtime_calc(ni); 2634 ieee80211_send_action(ni, 2635 IEEE80211_ACTION_CAT_MESH, 2636 IEEE80211_ACTION_MESH_LMETRIC, 2637 &lm_rep); 2638 } 2639 /* XXX: else do nothing for now */ 2640 return 0; 2641 } 2642 2643 /* 2644 * Parse meshgate action ie's for GANN frames. 2645 * Returns -1 if parsing fails, otherwise 0. 2646 */ 2647 static int 2648 mesh_parse_meshgate_action(struct ieee80211_node *ni, 2649 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2650 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2651 { 2652 struct ieee80211vap *vap = ni->ni_vap; 2653 const struct ieee80211_meshgann_ie *gannie; 2654 2655 while (efrm - frm > 1) { 2656 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2657 switch (*frm) { 2658 case IEEE80211_ELEMID_MESHGANN: 2659 gannie = (const struct ieee80211_meshgann_ie *) frm; 2660 memset(ie, 0, sizeof(*ie)); 2661 ie->gann_ie = gannie->gann_ie; 2662 ie->gann_len = gannie->gann_len; 2663 ie->gann_flags = gannie->gann_flags; 2664 ie->gann_hopcount = gannie->gann_hopcount; 2665 ie->gann_ttl = gannie->gann_ttl; 2666 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2667 ie->gann_seq = LE_READ_4(&gannie->gann_seq); 2668 ie->gann_interval = LE_READ_2(&gannie->gann_interval); 2669 break; 2670 } 2671 frm += frm[1] + 2; 2672 } 2673 2674 return 0; 2675 } 2676 2677 /* 2678 * Mesh Gate Announcement handling. 2679 */ 2680 static int 2681 mesh_recv_action_meshgate(struct ieee80211_node *ni, 2682 const struct ieee80211_frame *wh, 2683 const uint8_t *frm, const uint8_t *efrm) 2684 { 2685 struct ieee80211vap *vap = ni->ni_vap; 2686 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2687 struct ieee80211_mesh_gate_route *gr, *next; 2688 struct ieee80211_mesh_route *rt_gate; 2689 struct ieee80211_meshgann_ie pgann; 2690 struct ieee80211_meshgann_ie ie; 2691 int found = 0; 2692 2693 /* +2 for action + code */ 2694 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2695 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2696 ni->ni_macaddr, NULL, "%s", 2697 "GANN parsing failed"); 2698 vap->iv_stats.is_rx_mgtdiscard++; 2699 return (0); 2700 } 2701 2702 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2703 return 0; 2704 2705 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2706 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2707 ie.gann_seq); 2708 2709 if (ms == NULL) 2710 return (0); 2711 MESH_RT_LOCK(ms); 2712 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2713 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2714 continue; 2715 if (ie.gann_seq <= gr->gr_lastseq) { 2716 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2717 ni->ni_macaddr, NULL, 2718 "GANN old seqno %u <= %u", 2719 ie.gann_seq, gr->gr_lastseq); 2720 MESH_RT_UNLOCK(ms); 2721 return (0); 2722 } 2723 /* corresponding mesh gate found & GANN accepted */ 2724 found = 1; 2725 break; 2726 2727 } 2728 if (found == 0) { 2729 /* this GANN is from a new mesh Gate add it to known table. */ 2730 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2731 "stored new GANN information, seq %u.", ie.gann_seq); 2732 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2733 M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO); 2734 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2735 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2736 } 2737 gr->gr_lastseq = ie.gann_seq; 2738 2739 /* check if we have a path to this gate */ 2740 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2741 if (rt_gate != NULL && 2742 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2743 gr->gr_route = rt_gate; 2744 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2745 } 2746 2747 MESH_RT_UNLOCK(ms); 2748 2749 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2750 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2751 return 0; 2752 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2753 pgann.gann_hopcount = ie.gann_hopcount + 1; 2754 pgann.gann_ttl = ie.gann_ttl - 1; 2755 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2756 pgann.gann_seq = ie.gann_seq; 2757 pgann.gann_interval = ie.gann_interval; 2758 2759 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2760 "%s", "propagate GANN"); 2761 2762 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2763 IEEE80211_ACTION_MESH_GANN, &pgann); 2764 2765 return 0; 2766 } 2767 2768 static int 2769 mesh_send_action(struct ieee80211_node *ni, 2770 const uint8_t sa[IEEE80211_ADDR_LEN], 2771 const uint8_t da[IEEE80211_ADDR_LEN], 2772 struct mbuf *m) 2773 { 2774 struct ieee80211vap *vap = ni->ni_vap; 2775 struct ieee80211com *ic = ni->ni_ic; 2776 struct ieee80211_bpf_params params; 2777 struct ieee80211_frame *wh; 2778 int ret; 2779 2780 KASSERT(ni != NULL, ("null node")); 2781 2782 if (vap->iv_state == IEEE80211_S_CAC) { 2783 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2784 "block %s frame in CAC state", "Mesh action"); 2785 vap->iv_stats.is_tx_badstate++; 2786 ieee80211_free_node(ni); 2787 m_freem(m); 2788 return EIO; /* XXX */ 2789 } 2790 2791 M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 2792 if (m == NULL) { 2793 ieee80211_free_node(ni); 2794 return ENOMEM; 2795 } 2796 2797 IEEE80211_TX_LOCK(ic); 2798 wh = mtod(m, struct ieee80211_frame *); 2799 ieee80211_send_setup(ni, m, 2800 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2801 IEEE80211_NONQOS_TID, sa, da, sa); 2802 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2803 2804 memset(¶ms, 0, sizeof(params)); 2805 params.ibp_pri = WME_AC_VO; 2806 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2807 if (IEEE80211_IS_MULTICAST(da)) 2808 params.ibp_try0 = 1; 2809 else 2810 params.ibp_try0 = ni->ni_txparms->maxretry; 2811 params.ibp_power = ni->ni_txpower; 2812 2813 IEEE80211_NODE_STAT(ni, tx_mgmt); 2814 2815 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2816 IEEE80211_TX_UNLOCK(ic); 2817 return (ret); 2818 } 2819 2820 #define ADDSHORT(frm, v) do { \ 2821 frm[0] = (v) & 0xff; \ 2822 frm[1] = (v) >> 8; \ 2823 frm += 2; \ 2824 } while (0) 2825 #define ADDWORD(frm, v) do { \ 2826 frm[0] = (v) & 0xff; \ 2827 frm[1] = ((v) >> 8) & 0xff; \ 2828 frm[2] = ((v) >> 16) & 0xff; \ 2829 frm[3] = ((v) >> 24) & 0xff; \ 2830 frm += 4; \ 2831 } while (0) 2832 2833 static int 2834 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2835 int category, int action, void *args0) 2836 { 2837 struct ieee80211vap *vap = ni->ni_vap; 2838 struct ieee80211com *ic = ni->ni_ic; 2839 uint16_t *args = args0; 2840 const struct ieee80211_rateset *rs; 2841 struct mbuf *m; 2842 uint8_t *frm; 2843 2844 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2845 "send PEER OPEN action: localid 0x%x", args[0]); 2846 2847 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2848 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2849 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2850 ieee80211_ref_node(ni); 2851 2852 m = ieee80211_getmgtframe(&frm, 2853 ic->ic_headroom + sizeof(struct ieee80211_frame), 2854 sizeof(uint16_t) /* action+category */ 2855 + sizeof(uint16_t) /* capabilites */ 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 open action frame format: 2865 * [1] category 2866 * [1] action 2867 * [2] capabilities 2868 * [tlv] rates 2869 * [tlv] xrates 2870 * [tlv] mesh id 2871 * [tlv] mesh conf 2872 * [tlv] mesh peer link mgmt 2873 */ 2874 *frm++ = category; 2875 *frm++ = action; 2876 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2877 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2878 frm = ieee80211_add_rates(frm, rs); 2879 frm = ieee80211_add_xrates(frm, rs); 2880 frm = ieee80211_add_meshid(frm, vap); 2881 frm = ieee80211_add_meshconf(frm, vap); 2882 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2883 args[0], 0, 0); 2884 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2885 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2886 } else { 2887 vap->iv_stats.is_tx_nobuf++; 2888 ieee80211_free_node(ni); 2889 return ENOMEM; 2890 } 2891 } 2892 2893 static int 2894 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2895 int category, int action, void *args0) 2896 { 2897 struct ieee80211vap *vap = ni->ni_vap; 2898 struct ieee80211com *ic = ni->ni_ic; 2899 uint16_t *args = args0; 2900 const struct ieee80211_rateset *rs; 2901 struct mbuf *m; 2902 uint8_t *frm; 2903 2904 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2905 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2906 args[0], args[1]); 2907 2908 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2909 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2910 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2911 ieee80211_ref_node(ni); 2912 2913 m = ieee80211_getmgtframe(&frm, 2914 ic->ic_headroom + sizeof(struct ieee80211_frame), 2915 sizeof(uint16_t) /* action+category */ 2916 + sizeof(uint16_t) /* capabilites */ 2917 + sizeof(uint16_t) /* status code */ 2918 + sizeof(uint16_t) /* AID */ 2919 + 2 + IEEE80211_RATE_SIZE 2920 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2921 + 2 + IEEE80211_MESHID_LEN 2922 + sizeof(struct ieee80211_meshconf_ie) 2923 + sizeof(struct ieee80211_meshpeer_ie) 2924 ); 2925 if (m != NULL) { 2926 /* 2927 * mesh peer confirm action frame format: 2928 * [1] category 2929 * [1] action 2930 * [2] capabilities 2931 * [2] status code 2932 * [2] association id (peer ID) 2933 * [tlv] rates 2934 * [tlv] xrates 2935 * [tlv] mesh id 2936 * [tlv] mesh conf 2937 * [tlv] mesh peer link mgmt 2938 */ 2939 *frm++ = category; 2940 *frm++ = action; 2941 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2942 ADDSHORT(frm, 0); /* status code */ 2943 ADDSHORT(frm, args[1]); /* AID */ 2944 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2945 frm = ieee80211_add_rates(frm, rs); 2946 frm = ieee80211_add_xrates(frm, rs); 2947 frm = ieee80211_add_meshid(frm, vap); 2948 frm = ieee80211_add_meshconf(frm, vap); 2949 frm = ieee80211_add_meshpeer(frm, 2950 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2951 args[0], args[1], 0); 2952 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2953 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2954 } else { 2955 vap->iv_stats.is_tx_nobuf++; 2956 ieee80211_free_node(ni); 2957 return ENOMEM; 2958 } 2959 } 2960 2961 static int 2962 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2963 int category, int action, void *args0) 2964 { 2965 struct ieee80211vap *vap = ni->ni_vap; 2966 struct ieee80211com *ic = ni->ni_ic; 2967 uint16_t *args = args0; 2968 struct mbuf *m; 2969 uint8_t *frm; 2970 2971 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2972 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2973 args[0], args[1], args[2]); 2974 2975 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2976 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2977 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2978 ieee80211_ref_node(ni); 2979 2980 m = ieee80211_getmgtframe(&frm, 2981 ic->ic_headroom + sizeof(struct ieee80211_frame), 2982 sizeof(uint16_t) /* action+category */ 2983 + sizeof(uint16_t) /* reason code */ 2984 + 2 + IEEE80211_MESHID_LEN 2985 + sizeof(struct ieee80211_meshpeer_ie) 2986 ); 2987 if (m != NULL) { 2988 /* 2989 * mesh peer close action frame format: 2990 * [1] category 2991 * [1] action 2992 * [tlv] mesh id 2993 * [tlv] mesh peer link mgmt 2994 */ 2995 *frm++ = category; 2996 *frm++ = action; 2997 frm = ieee80211_add_meshid(frm, vap); 2998 frm = ieee80211_add_meshpeer(frm, 2999 IEEE80211_ACTION_MESHPEERING_CLOSE, 3000 args[0], args[1], args[2]); 3001 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3002 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 3003 } else { 3004 vap->iv_stats.is_tx_nobuf++; 3005 ieee80211_free_node(ni); 3006 return ENOMEM; 3007 } 3008 } 3009 3010 static int 3011 mesh_send_action_meshlmetric(struct ieee80211_node *ni, 3012 int category, int action, void *arg0) 3013 { 3014 struct ieee80211vap *vap = ni->ni_vap; 3015 struct ieee80211com *ic = ni->ni_ic; 3016 struct ieee80211_meshlmetric_ie *ie = arg0; 3017 struct mbuf *m; 3018 uint8_t *frm; 3019 3020 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 3021 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3022 ni, "%s", "send LINK METRIC REQUEST action"); 3023 } else { 3024 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3025 ni, "send LINK METRIC REPLY action: metric 0x%x", 3026 ie->lm_metric); 3027 } 3028 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3029 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 3030 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 3031 ieee80211_ref_node(ni); 3032 3033 m = ieee80211_getmgtframe(&frm, 3034 ic->ic_headroom + sizeof(struct ieee80211_frame), 3035 sizeof(uint16_t) + /* action+category */ 3036 sizeof(struct ieee80211_meshlmetric_ie) 3037 ); 3038 if (m != NULL) { 3039 /* 3040 * mesh link metric 3041 * [1] category 3042 * [1] action 3043 * [tlv] mesh link metric 3044 */ 3045 *frm++ = category; 3046 *frm++ = action; 3047 frm = ieee80211_add_meshlmetric(frm, 3048 ie->lm_flags, ie->lm_metric); 3049 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3050 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 3051 } else { 3052 vap->iv_stats.is_tx_nobuf++; 3053 ieee80211_free_node(ni); 3054 return ENOMEM; 3055 } 3056 } 3057 3058 static int 3059 mesh_send_action_meshgate(struct ieee80211_node *ni, 3060 int category, int action, void *arg0) 3061 { 3062 struct ieee80211vap *vap = ni->ni_vap; 3063 struct ieee80211com *ic = ni->ni_ic; 3064 struct ieee80211_meshgann_ie *ie = arg0; 3065 struct mbuf *m; 3066 uint8_t *frm; 3067 3068 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3069 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 3070 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 3071 ieee80211_ref_node(ni); 3072 3073 m = ieee80211_getmgtframe(&frm, 3074 ic->ic_headroom + sizeof(struct ieee80211_frame), 3075 sizeof(uint16_t) + /* action+category */ 3076 IEEE80211_MESHGANN_BASE_SZ 3077 ); 3078 if (m != NULL) { 3079 /* 3080 * mesh link metric 3081 * [1] category 3082 * [1] action 3083 * [tlv] mesh gate annoucement 3084 */ 3085 *frm++ = category; 3086 *frm++ = action; 3087 frm = ieee80211_add_meshgate(frm, ie); 3088 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3089 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 3090 } else { 3091 vap->iv_stats.is_tx_nobuf++; 3092 ieee80211_free_node(ni); 3093 return ENOMEM; 3094 } 3095 } 3096 3097 static void 3098 mesh_peer_timeout_setup(struct ieee80211_node *ni) 3099 { 3100 switch (ni->ni_mlstate) { 3101 case IEEE80211_NODE_MESH_HOLDING: 3102 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 3103 break; 3104 case IEEE80211_NODE_MESH_CONFIRMRCV: 3105 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 3106 break; 3107 case IEEE80211_NODE_MESH_IDLE: 3108 ni->ni_mltval = 0; 3109 break; 3110 default: 3111 ni->ni_mltval = ieee80211_mesh_retrytimeout; 3112 break; 3113 } 3114 if (ni->ni_mltval) 3115 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 3116 mesh_peer_timeout_cb, ni); 3117 } 3118 3119 /* 3120 * Same as above but backoffs timer statisically 50%. 3121 */ 3122 static void 3123 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3124 { 3125 uint32_t r; 3126 3127 r = arc4random(); 3128 ni->ni_mltval += r % ni->ni_mltval; 3129 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3130 ni); 3131 } 3132 3133 static __inline void 3134 mesh_peer_timeout_stop(struct ieee80211_node *ni) 3135 { 3136 callout_drain(&ni->ni_mltimer); 3137 } 3138 3139 static void 3140 mesh_peer_backoff_cb(void *arg) 3141 { 3142 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3143 3144 /* After backoff timeout, try to peer automatically again. */ 3145 ni->ni_mlhcnt = 0; 3146 } 3147 3148 /* 3149 * Mesh Peer Link Management FSM timeout handling. 3150 */ 3151 static void 3152 mesh_peer_timeout_cb(void *arg) 3153 { 3154 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3155 uint16_t args[3]; 3156 3157 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3158 ni, "mesh link timeout, state %d, retry counter %d", 3159 ni->ni_mlstate, ni->ni_mlrcnt); 3160 3161 switch (ni->ni_mlstate) { 3162 case IEEE80211_NODE_MESH_IDLE: 3163 case IEEE80211_NODE_MESH_ESTABLISHED: 3164 break; 3165 case IEEE80211_NODE_MESH_OPENSNT: 3166 case IEEE80211_NODE_MESH_OPENRCV: 3167 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3168 args[0] = ni->ni_mlpid; 3169 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3170 ieee80211_send_action(ni, 3171 IEEE80211_ACTION_CAT_SELF_PROT, 3172 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3173 ni->ni_mlrcnt = 0; 3174 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3175 mesh_peer_timeout_setup(ni); 3176 } else { 3177 args[0] = ni->ni_mlpid; 3178 ieee80211_send_action(ni, 3179 IEEE80211_ACTION_CAT_SELF_PROT, 3180 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3181 ni->ni_mlrcnt++; 3182 mesh_peer_timeout_backoff(ni); 3183 } 3184 break; 3185 case IEEE80211_NODE_MESH_CONFIRMRCV: 3186 args[0] = ni->ni_mlpid; 3187 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3188 ieee80211_send_action(ni, 3189 IEEE80211_ACTION_CAT_SELF_PROT, 3190 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3191 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3192 mesh_peer_timeout_setup(ni); 3193 break; 3194 case IEEE80211_NODE_MESH_HOLDING: 3195 ni->ni_mlhcnt++; 3196 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3197 callout_reset(&ni->ni_mlhtimer, 3198 ieee80211_mesh_backofftimeout, 3199 mesh_peer_backoff_cb, ni); 3200 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3201 break; 3202 } 3203 } 3204 3205 static int 3206 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3207 { 3208 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3209 3210 if (ie == NULL || ie[1] != ms->ms_idlen) 3211 return 1; 3212 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3213 } 3214 3215 /* 3216 * Check if we are using the same algorithms for this mesh. 3217 */ 3218 static int 3219 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3220 { 3221 const struct ieee80211_meshconf_ie *meshconf = 3222 (const struct ieee80211_meshconf_ie *) ie; 3223 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3224 3225 if (meshconf == NULL) 3226 return 1; 3227 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3228 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3229 "unknown path selection algorithm: 0x%x\n", 3230 meshconf->conf_pselid); 3231 return 1; 3232 } 3233 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3234 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3235 "unknown path metric algorithm: 0x%x\n", 3236 meshconf->conf_pmetid); 3237 return 1; 3238 } 3239 if (meshconf->conf_ccid != 0) { 3240 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3241 "unknown congestion control algorithm: 0x%x\n", 3242 meshconf->conf_ccid); 3243 return 1; 3244 } 3245 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3246 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3247 "unknown sync algorithm: 0x%x\n", 3248 meshconf->conf_syncid); 3249 return 1; 3250 } 3251 if (meshconf->conf_authid != 0) { 3252 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3253 "unknown auth auth algorithm: 0x%x\n", 3254 meshconf->conf_pselid); 3255 return 1; 3256 } 3257 /* Not accepting peers */ 3258 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3259 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3260 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3261 return 1; 3262 } 3263 return 0; 3264 } 3265 3266 static int 3267 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3268 const uint8_t *ie) 3269 { 3270 const struct ieee80211_meshpeer_ie *meshpeer = 3271 (const struct ieee80211_meshpeer_ie *) ie; 3272 3273 if (meshpeer == NULL || 3274 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3275 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3276 return 1; 3277 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3278 IEEE80211_DPRINTF(vap, 3279 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3280 "Only MPM protocol is supported (proto: 0x%02X)", 3281 meshpeer->peer_proto); 3282 return 1; 3283 } 3284 switch (subtype) { 3285 case IEEE80211_ACTION_MESHPEERING_OPEN: 3286 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3287 return 1; 3288 break; 3289 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3290 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3291 return 1; 3292 break; 3293 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3294 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3295 return 1; 3296 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3297 meshpeer->peer_linkid != 0) 3298 return 1; 3299 if (meshpeer->peer_rcode == 0) 3300 return 1; 3301 break; 3302 } 3303 return 0; 3304 } 3305 3306 /* 3307 * Add a Mesh ID IE to a frame. 3308 */ 3309 uint8_t * 3310 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3311 { 3312 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3313 3314 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3315 3316 *frm++ = IEEE80211_ELEMID_MESHID; 3317 *frm++ = ms->ms_idlen; 3318 memcpy(frm, ms->ms_id, ms->ms_idlen); 3319 return frm + ms->ms_idlen; 3320 } 3321 3322 /* 3323 * Add a Mesh Configuration IE to a frame. 3324 * For now just use HWMP routing, Airtime link metric, Null Congestion 3325 * Signaling, Null Sync Protocol and Null Authentication. 3326 */ 3327 uint8_t * 3328 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3329 { 3330 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3331 uint16_t caps; 3332 3333 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3334 3335 *frm++ = IEEE80211_ELEMID_MESHCONF; 3336 *frm++ = IEEE80211_MESH_CONF_SZ; 3337 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3338 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3339 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3340 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3341 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3342 /* NB: set the number of neighbors before the rest */ 3343 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3344 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3345 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3346 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3347 frm += 1; 3348 caps = 0; 3349 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3350 caps |= IEEE80211_MESHCONF_CAP_AP; 3351 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3352 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3353 *frm++ = caps; 3354 return frm; 3355 } 3356 3357 /* 3358 * Add a Mesh Peer Management IE to a frame. 3359 */ 3360 uint8_t * 3361 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3362 uint16_t peerid, uint16_t reason) 3363 { 3364 3365 KASSERT(localid != 0, ("localid == 0")); 3366 3367 *frm++ = IEEE80211_ELEMID_MESHPEER; 3368 switch (subtype) { 3369 case IEEE80211_ACTION_MESHPEERING_OPEN: 3370 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3371 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3372 ADDSHORT(frm, localid); /* local ID */ 3373 break; 3374 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3375 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3376 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3377 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3378 ADDSHORT(frm, localid); /* local ID */ 3379 ADDSHORT(frm, peerid); /* peer ID */ 3380 break; 3381 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3382 if (peerid) 3383 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3384 else 3385 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3386 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3387 ADDSHORT(frm, localid); /* local ID */ 3388 if (peerid) 3389 ADDSHORT(frm, peerid); /* peer ID */ 3390 ADDSHORT(frm, reason); 3391 break; 3392 } 3393 return frm; 3394 } 3395 3396 /* 3397 * Compute an Airtime Link Metric for the link with this node. 3398 * 3399 * Based on Draft 3.0 spec (11B.10, p.149). 3400 */ 3401 /* 3402 * Max 802.11s overhead. 3403 */ 3404 #define IEEE80211_MESH_MAXOVERHEAD \ 3405 (sizeof(struct ieee80211_qosframe_addr4) \ 3406 + sizeof(struct ieee80211_meshcntl_ae10) \ 3407 + sizeof(struct llc) \ 3408 + IEEE80211_ADDR_LEN \ 3409 + IEEE80211_WEP_IVLEN \ 3410 + IEEE80211_WEP_KIDLEN \ 3411 + IEEE80211_WEP_CRCLEN \ 3412 + IEEE80211_WEP_MICLEN \ 3413 + IEEE80211_CRC_LEN) 3414 uint32_t 3415 mesh_airtime_calc(struct ieee80211_node *ni) 3416 { 3417 #define M_BITS 8 3418 #define S_FACTOR (2 * M_BITS) 3419 struct ieee80211com *ic = ni->ni_ic; 3420 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3421 const static int nbits = 8192 << M_BITS; 3422 uint32_t overhead, rate, errrate; 3423 uint64_t res; 3424 3425 /* Time to transmit a frame */ 3426 rate = ni->ni_txrate; 3427 overhead = ieee80211_compute_duration(ic->ic_rt, 3428 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3429 /* Error rate in percentage */ 3430 /* XXX assuming small failures are ok */ 3431 errrate = (((ifp->if_oerrors + 3432 ifp->if_ierrors) / 100) << M_BITS) / 100; 3433 res = (overhead + (nbits / rate)) * 3434 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3435 3436 return (uint32_t)(res >> S_FACTOR); 3437 #undef M_BITS 3438 #undef S_FACTOR 3439 } 3440 3441 /* 3442 * Add a Mesh Link Metric report IE to a frame. 3443 */ 3444 uint8_t * 3445 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3446 { 3447 *frm++ = IEEE80211_ELEMID_MESHLINK; 3448 *frm++ = 5; 3449 *frm++ = flags; 3450 ADDWORD(frm, metric); 3451 return frm; 3452 } 3453 3454 /* 3455 * Add a Mesh Gate Announcement IE to a frame. 3456 */ 3457 uint8_t * 3458 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3459 { 3460 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3461 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3462 *frm++ = ie->gann_flags; 3463 *frm++ = ie->gann_hopcount; 3464 *frm++ = ie->gann_ttl; 3465 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3466 frm += 6; 3467 ADDWORD(frm, ie->gann_seq); 3468 ADDSHORT(frm, ie->gann_interval); 3469 return frm; 3470 } 3471 #undef ADDSHORT 3472 #undef ADDWORD 3473 3474 /* 3475 * Initialize any mesh-specific node state. 3476 */ 3477 void 3478 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3479 { 3480 ni->ni_flags |= IEEE80211_NODE_QOS; 3481 callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE); 3482 callout_init(&ni->ni_mlhtimer, CALLOUT_MPSAFE); 3483 } 3484 3485 /* 3486 * Cleanup any mesh-specific node state. 3487 */ 3488 void 3489 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3490 { 3491 struct ieee80211vap *vap = ni->ni_vap; 3492 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3493 3494 callout_drain(&ni->ni_mltimer); 3495 callout_drain(&ni->ni_mlhtimer); 3496 /* NB: short-circuit callbacks after mesh_vdetach */ 3497 if (vap->iv_mesh != NULL) 3498 ms->ms_ppath->mpp_peerdown(ni); 3499 } 3500 3501 void 3502 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3503 { 3504 ni->ni_meshidlen = ie[1]; 3505 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3506 } 3507 3508 /* 3509 * Setup mesh-specific node state on neighbor discovery. 3510 */ 3511 void 3512 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3513 const struct ieee80211_frame *wh, 3514 const struct ieee80211_scanparams *sp) 3515 { 3516 ieee80211_parse_meshid(ni, sp->meshid); 3517 } 3518 3519 void 3520 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3521 struct ieee80211_beacon_offsets *bo) 3522 { 3523 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3524 3525 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3526 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3527 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3528 } 3529 } 3530 3531 static int 3532 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3533 { 3534 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3535 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3536 struct ieee80211_mesh_route *rt; 3537 struct ieee80211req_mesh_route *imr; 3538 size_t len, off; 3539 uint8_t *p; 3540 int error; 3541 3542 if (vap->iv_opmode != IEEE80211_M_MBSS) 3543 return ENOSYS; 3544 3545 error = 0; 3546 switch (ireq->i_type) { 3547 case IEEE80211_IOC_MESH_ID: 3548 ireq->i_len = ms->ms_idlen; 3549 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3550 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3551 break; 3552 case IEEE80211_IOC_MESH_AP: 3553 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3554 break; 3555 case IEEE80211_IOC_MESH_FWRD: 3556 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3557 break; 3558 case IEEE80211_IOC_MESH_GATE: 3559 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3560 break; 3561 case IEEE80211_IOC_MESH_TTL: 3562 ireq->i_val = ms->ms_ttl; 3563 break; 3564 case IEEE80211_IOC_MESH_RTCMD: 3565 switch (ireq->i_val) { 3566 case IEEE80211_MESH_RTCMD_LIST: 3567 len = 0; 3568 MESH_RT_LOCK(ms); 3569 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3570 len += sizeof(*imr); 3571 } 3572 MESH_RT_UNLOCK(ms); 3573 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3574 ireq->i_len = len; 3575 return ENOMEM; 3576 } 3577 ireq->i_len = len; 3578 /* XXX M_WAIT? */ 3579 p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO); 3580 if (p == NULL) 3581 return ENOMEM; 3582 off = 0; 3583 MESH_RT_LOCK(ms); 3584 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3585 if (off >= len) 3586 break; 3587 imr = (struct ieee80211req_mesh_route *) 3588 (p + off); 3589 IEEE80211_ADDR_COPY(imr->imr_dest, 3590 rt->rt_dest); 3591 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3592 rt->rt_nexthop); 3593 imr->imr_metric = rt->rt_metric; 3594 imr->imr_nhops = rt->rt_nhops; 3595 imr->imr_lifetime = 3596 ieee80211_mesh_rt_update(rt, 0); 3597 imr->imr_lastmseq = rt->rt_lastmseq; 3598 imr->imr_flags = rt->rt_flags; /* last */ 3599 off += sizeof(*imr); 3600 } 3601 MESH_RT_UNLOCK(ms); 3602 error = copyout(p, (uint8_t *)ireq->i_data, 3603 ireq->i_len); 3604 free(p, M_TEMP); 3605 break; 3606 case IEEE80211_MESH_RTCMD_FLUSH: 3607 case IEEE80211_MESH_RTCMD_ADD: 3608 case IEEE80211_MESH_RTCMD_DELETE: 3609 return EINVAL; 3610 default: 3611 return ENOSYS; 3612 } 3613 break; 3614 case IEEE80211_IOC_MESH_PR_METRIC: 3615 len = strlen(ms->ms_pmetric->mpm_descr); 3616 if (ireq->i_len < len) 3617 return EINVAL; 3618 ireq->i_len = len; 3619 error = copyout(ms->ms_pmetric->mpm_descr, 3620 (uint8_t *)ireq->i_data, len); 3621 break; 3622 case IEEE80211_IOC_MESH_PR_PATH: 3623 len = strlen(ms->ms_ppath->mpp_descr); 3624 if (ireq->i_len < len) 3625 return EINVAL; 3626 ireq->i_len = len; 3627 error = copyout(ms->ms_ppath->mpp_descr, 3628 (uint8_t *)ireq->i_data, len); 3629 break; 3630 default: 3631 return ENOSYS; 3632 } 3633 3634 return error; 3635 } 3636 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3637 3638 static int 3639 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3640 { 3641 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3642 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3643 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3644 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3645 int error; 3646 3647 if (vap->iv_opmode != IEEE80211_M_MBSS) 3648 return ENOSYS; 3649 3650 error = 0; 3651 switch (ireq->i_type) { 3652 case IEEE80211_IOC_MESH_ID: 3653 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3654 return EINVAL; 3655 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3656 if (error != 0) 3657 break; 3658 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3659 ms->ms_idlen = ireq->i_len; 3660 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3661 error = ENETRESET; 3662 break; 3663 case IEEE80211_IOC_MESH_AP: 3664 if (ireq->i_val) 3665 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3666 else 3667 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3668 error = ENETRESET; 3669 break; 3670 case IEEE80211_IOC_MESH_FWRD: 3671 if (ireq->i_val) 3672 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3673 else 3674 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3675 mesh_gatemode_setup(vap); 3676 break; 3677 case IEEE80211_IOC_MESH_GATE: 3678 if (ireq->i_val) 3679 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3680 else 3681 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3682 break; 3683 case IEEE80211_IOC_MESH_TTL: 3684 ms->ms_ttl = (uint8_t) ireq->i_val; 3685 break; 3686 case IEEE80211_IOC_MESH_RTCMD: 3687 switch (ireq->i_val) { 3688 case IEEE80211_MESH_RTCMD_LIST: 3689 return EINVAL; 3690 case IEEE80211_MESH_RTCMD_FLUSH: 3691 ieee80211_mesh_rt_flush(vap); 3692 break; 3693 case IEEE80211_MESH_RTCMD_ADD: 3694 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3695 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3696 return EINVAL; 3697 error = copyin(ireq->i_data, &tmpaddr, 3698 IEEE80211_ADDR_LEN); 3699 if (error == 0) 3700 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3701 break; 3702 case IEEE80211_MESH_RTCMD_DELETE: 3703 ieee80211_mesh_rt_del(vap, ireq->i_data); 3704 break; 3705 default: 3706 return ENOSYS; 3707 } 3708 break; 3709 case IEEE80211_IOC_MESH_PR_METRIC: 3710 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3711 if (error == 0) { 3712 error = mesh_select_proto_metric(vap, tmpproto); 3713 if (error == 0) 3714 error = ENETRESET; 3715 } 3716 break; 3717 case IEEE80211_IOC_MESH_PR_PATH: 3718 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3719 if (error == 0) { 3720 error = mesh_select_proto_path(vap, tmpproto); 3721 if (error == 0) 3722 error = ENETRESET; 3723 } 3724 break; 3725 default: 3726 return ENOSYS; 3727 } 3728 return error; 3729 } 3730 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3731