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 ifnet *parent = ic->ic_ifp; 1045 struct ieee80211_node *ni; 1046 struct ether_header *eh; 1047 int error; 1048 1049 eh = mtod(m, struct ether_header *); 1050 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1051 if (ni == NULL) { 1052 ifp->if_oerrors++; 1053 m_freem(m); 1054 return; 1055 } 1056 1057 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 1058 (m->m_flags & M_PWR_SAV) == 0) { 1059 /* 1060 * Station in power save mode; pass the frame 1061 * to the 802.11 layer and continue. We'll get 1062 * the frame back when the time is right. 1063 * XXX lose WDS vap linkage? 1064 */ 1065 (void) ieee80211_pwrsave(ni, m); 1066 ieee80211_free_node(ni); 1067 return; 1068 } 1069 1070 /* calculate priority so drivers can find the tx queue */ 1071 if (ieee80211_classify(ni, m)) { 1072 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 1073 eh->ether_dhost, NULL, 1074 "%s", "classification failure"); 1075 vap->iv_stats.is_tx_classify++; 1076 ifp->if_oerrors++; 1077 m_freem(m); 1078 ieee80211_free_node(ni); 1079 return; 1080 } 1081 /* 1082 * Stash the node pointer. Note that we do this after 1083 * any call to ieee80211_dwds_mcast because that code 1084 * uses any existing value for rcvif to identify the 1085 * interface it (might have been) received on. 1086 */ 1087 m->m_pkthdr.rcvif = (void *)ni; 1088 1089 BPF_MTAP(ifp, m); /* 802.3 tx */ 1090 1091 /* 1092 * Check if A-MPDU tx aggregation is setup or if we 1093 * should try to enable it. The sta must be associated 1094 * with HT and A-MPDU enabled for use. When the policy 1095 * routine decides we should enable A-MPDU we issue an 1096 * ADDBA request and wait for a reply. The frame being 1097 * encapsulated will go out w/o using A-MPDU, or possibly 1098 * it might be collected by the driver and held/retransmit. 1099 * The default ic_ampdu_enable routine handles staggering 1100 * ADDBA requests in case the receiver NAK's us or we are 1101 * otherwise unable to establish a BA stream. 1102 */ 1103 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) && 1104 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX) && 1105 (m->m_flags & M_EAPOL) == 0) { 1106 int tid = WME_AC_TO_TID(M_WME_GETAC(m)); 1107 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid]; 1108 1109 ieee80211_txampdu_count_packet(tap); 1110 if (IEEE80211_AMPDU_RUNNING(tap)) { 1111 /* 1112 * Operational, mark frame for aggregation. 1113 * 1114 * XXX do tx aggregation here 1115 */ 1116 m->m_flags |= M_AMPDU_MPDU; 1117 } else if (!IEEE80211_AMPDU_REQUESTED(tap) && 1118 ic->ic_ampdu_enable(ni, tap)) { 1119 /* 1120 * Not negotiated yet, request service. 1121 */ 1122 ieee80211_ampdu_request(ni, tap); 1123 /* XXX hold frame for reply? */ 1124 } 1125 } 1126 #ifdef IEEE80211_SUPPORT_SUPERG 1127 else if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF)) { 1128 m = ieee80211_ff_check(ni, m); 1129 if (m == NULL) { 1130 /* NB: any ni ref held on stageq */ 1131 return; 1132 } 1133 } 1134 #endif /* IEEE80211_SUPPORT_SUPERG */ 1135 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 1136 /* 1137 * Encapsulate the packet in prep for transmission. 1138 */ 1139 m = ieee80211_encap(vap, ni, m); 1140 if (m == NULL) { 1141 /* NB: stat+msg handled in ieee80211_encap */ 1142 ieee80211_free_node(ni); 1143 return; 1144 } 1145 } 1146 error = parent->if_transmit(parent, m); 1147 if (error != 0) { 1148 m_freem(m); 1149 ieee80211_free_node(ni); 1150 } else { 1151 ifp->if_opackets++; 1152 } 1153 ic->ic_lastdata = ticks; 1154 } 1155 1156 /* 1157 * Forward the queued frames to known valid mesh gates. 1158 * Assume destination to be outside the MBSS (i.e. proxy entry), 1159 * If no valid mesh gates are known silently discard queued frames. 1160 * After transmitting frames to all known valid mesh gates, this route 1161 * will be marked invalid, and a new path discovery will happen in the hopes 1162 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1163 */ 1164 void 1165 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1166 struct ieee80211_mesh_route *rt_dest) 1167 { 1168 struct ieee80211com *ic = vap->iv_ic; 1169 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1170 struct ieee80211_mesh_route *rt_gate; 1171 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1172 struct mbuf *m, *mcopy, *next; 1173 1174 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1175 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1176 1177 /* XXX: send to more than one valid mash gate */ 1178 MESH_RT_LOCK(ms); 1179 1180 m = ieee80211_ageq_remove(&ic->ic_stageq, 1181 (struct ieee80211_node *)(uintptr_t) 1182 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1183 1184 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1185 rt_gate = gr->gr_route; 1186 if (rt_gate == NULL) { 1187 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1188 rt_dest->rt_dest, 1189 "mesh gate with no path %6D", 1190 gr->gr_addr, ":"); 1191 continue; 1192 } 1193 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1194 continue; 1195 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1196 ("route not marked as a mesh gate")); 1197 KASSERT((rt_gate->rt_flags & 1198 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1199 ("found mesh gate that is also marked porxy")); 1200 /* 1201 * convert route to a proxy route gated by the current 1202 * mesh gate, this is needed so encap can built data 1203 * frame with correct address. 1204 */ 1205 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1206 IEEE80211_MESHRT_FLAGS_VALID; 1207 rt_dest->rt_ext_seq = 1; /* random value */ 1208 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1209 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1210 rt_dest->rt_metric = rt_gate->rt_metric; 1211 rt_dest->rt_nhops = rt_gate->rt_nhops; 1212 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1213 MESH_RT_UNLOCK(ms); 1214 /* XXX: lock?? */ 1215 mcopy = m_dup(m, M_NOWAIT); 1216 for (; mcopy != NULL; mcopy = next) { 1217 next = mcopy->m_nextpkt; 1218 mcopy->m_nextpkt = NULL; 1219 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1220 rt_dest->rt_dest, 1221 "flush queued frame %p len %d", mcopy, 1222 mcopy->m_pkthdr.len); 1223 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1224 } 1225 MESH_RT_LOCK(ms); 1226 } 1227 rt_dest->rt_flags = 0; /* Mark invalid */ 1228 m_freem(m); 1229 MESH_RT_UNLOCK(ms); 1230 } 1231 1232 /* 1233 * Forward the specified frame. 1234 * Decrement the TTL and set TA to our MAC address. 1235 */ 1236 static void 1237 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1238 const struct ieee80211_meshcntl *mc) 1239 { 1240 struct ieee80211com *ic = vap->iv_ic; 1241 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1242 struct ifnet *ifp = vap->iv_ifp; 1243 struct ifnet *parent = ic->ic_ifp; 1244 const struct ieee80211_frame *wh = 1245 mtod(m, const struct ieee80211_frame *); 1246 struct mbuf *mcopy; 1247 struct ieee80211_meshcntl *mccopy; 1248 struct ieee80211_frame *whcopy; 1249 struct ieee80211_node *ni; 1250 int err; 1251 1252 /* 1253 * mesh ttl of 1 means we are the last one receving it, 1254 * according to amendment we decrement and then check if 1255 * 0, if so we dont forward. 1256 */ 1257 if (mc->mc_ttl < 1) { 1258 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1259 "%s", "frame not fwd'd, ttl 1"); 1260 vap->iv_stats.is_mesh_fwd_ttl++; 1261 return; 1262 } 1263 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1264 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1265 "%s", "frame not fwd'd, fwding disabled"); 1266 vap->iv_stats.is_mesh_fwd_disabled++; 1267 return; 1268 } 1269 mcopy = m_dup(m, M_NOWAIT); 1270 if (mcopy == NULL) { 1271 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1272 "%s", "frame not fwd'd, cannot dup"); 1273 vap->iv_stats.is_mesh_fwd_nobuf++; 1274 ifp->if_oerrors++; 1275 return; 1276 } 1277 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1278 sizeof(struct ieee80211_meshcntl)); 1279 if (mcopy == NULL) { 1280 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1281 "%s", "frame not fwd'd, too short"); 1282 vap->iv_stats.is_mesh_fwd_tooshort++; 1283 ifp->if_oerrors++; 1284 m_freem(mcopy); 1285 return; 1286 } 1287 whcopy = mtod(mcopy, struct ieee80211_frame *); 1288 mccopy = (struct ieee80211_meshcntl *) 1289 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1290 /* XXX clear other bits? */ 1291 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1292 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1293 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1294 ni = ieee80211_ref_node(vap->iv_bss); 1295 mcopy->m_flags |= M_MCAST; 1296 } else { 1297 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1298 if (ni == NULL) { 1299 /* 1300 * [Optional] any of the following three actions: 1301 * o silently discard 1302 * o trigger a path discovery 1303 * o inform TA that meshDA is unknown. 1304 */ 1305 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1306 "%s", "frame not fwd'd, no path"); 1307 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1308 IEEE80211_REASON_MESH_PERR_NO_FI); 1309 vap->iv_stats.is_mesh_fwd_nopath++; 1310 m_freem(mcopy); 1311 return; 1312 } 1313 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1314 } 1315 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1316 mccopy->mc_ttl--; 1317 1318 /* XXX calculate priority so drivers can find the tx queue */ 1319 M_WME_SETAC(mcopy, WME_AC_BE); 1320 1321 /* XXX do we know m_nextpkt is NULL? */ 1322 mcopy->m_pkthdr.rcvif = (void *) ni; 1323 err = parent->if_transmit(parent, mcopy); 1324 if (err != 0) { 1325 /* NB: IFQ_HANDOFF reclaims mbuf */ 1326 ieee80211_free_node(ni); 1327 } else { 1328 ifp->if_opackets++; 1329 } 1330 } 1331 1332 static struct mbuf * 1333 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1334 { 1335 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1336 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1337 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1338 sizeof(struct ieee80211_meshcntl_ae10)]; 1339 const struct ieee80211_qosframe_addr4 *wh; 1340 const struct ieee80211_meshcntl_ae10 *mc; 1341 struct ether_header *eh; 1342 struct llc *llc; 1343 int ae; 1344 1345 if (m->m_len < hdrlen + sizeof(*llc) && 1346 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1347 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1348 "discard data frame: %s", "m_pullup failed"); 1349 vap->iv_stats.is_rx_tooshort++; 1350 return NULL; 1351 } 1352 memcpy(b, mtod(m, caddr_t), hdrlen); 1353 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1354 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1355 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1356 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1357 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1358 1359 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1360 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1361 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1362 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1363 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1364 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1365 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1366 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1367 llc = NULL; 1368 } else { 1369 m_adj(m, hdrlen - sizeof(*eh)); 1370 } 1371 eh = mtod(m, struct ether_header *); 1372 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1373 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1374 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1375 if (ae == IEEE80211_MESH_AE_00) { 1376 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1377 } else if (ae == IEEE80211_MESH_AE_01) { 1378 IEEE80211_ADDR_COPY(eh->ether_shost, 1379 MC01(mc)->mc_addr4); 1380 } else { 1381 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1382 (const struct ieee80211_frame *)wh, NULL, 1383 "bad AE %d", ae); 1384 vap->iv_stats.is_mesh_badae++; 1385 m_freem(m); 1386 return NULL; 1387 } 1388 } else { 1389 if (ae == IEEE80211_MESH_AE_00) { 1390 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1391 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1392 } else if (ae == IEEE80211_MESH_AE_10) { 1393 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1394 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1395 } else { 1396 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1397 (const struct ieee80211_frame *)wh, NULL, 1398 "bad AE %d", ae); 1399 vap->iv_stats.is_mesh_badae++; 1400 m_freem(m); 1401 return NULL; 1402 } 1403 } 1404 #ifndef __NO_STRICT_ALIGNMENT 1405 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1406 m = ieee80211_realign(vap, m, sizeof(*eh)); 1407 if (m == NULL) 1408 return NULL; 1409 } 1410 #endif /* !__NO_STRICT_ALIGNMENT */ 1411 if (llc != NULL) { 1412 eh = mtod(m, struct ether_header *); 1413 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1414 } 1415 return m; 1416 #undef WDIR 1417 #undef MC01 1418 } 1419 1420 /* 1421 * Return non-zero if the unicast mesh data frame should be processed 1422 * locally. Frames that are not proxy'd have our address, otherwise 1423 * we need to consult the routing table to look for a proxy entry. 1424 */ 1425 static __inline int 1426 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1427 const struct ieee80211_meshcntl *mc) 1428 { 1429 int ae = mc->mc_flags & 3; 1430 1431 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1432 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1433 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1434 ("bad AE %d", ae)); 1435 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1436 const struct ieee80211_meshcntl_ae10 *mc10 = 1437 (const struct ieee80211_meshcntl_ae10 *) mc; 1438 struct ieee80211_mesh_route *rt = 1439 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1440 /* check for proxy route to ourself */ 1441 return (rt != NULL && 1442 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1443 } else /* ucast w/o proxy */ 1444 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1445 } 1446 1447 /* 1448 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1449 * > 0 means we have forwarded data and no need to process locally 1450 * == 0 means we want to process locally (and we may have forwarded data 1451 * < 0 means there was an error and data should be discarded 1452 */ 1453 static int 1454 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1455 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1456 { 1457 struct ieee80211_qosframe_addr4 *qwh; 1458 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1459 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1460 1461 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1462 1463 /* 1464 * TODO: 1465 * o verify addr2 is a legitimate transmitter 1466 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1467 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1468 */ 1469 1470 /* set lifetime of addr3 (meshDA) to initial value */ 1471 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1472 if (rt_meshda == NULL) { 1473 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1474 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1475 /* 1476 * [Optional] any of the following three actions: 1477 * o silently discard [X] 1478 * o trigger a path discovery [ ] 1479 * o inform TA that meshDA is unknown. [ ] 1480 */ 1481 /* XXX: stats */ 1482 return (-1); 1483 } 1484 1485 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1486 ms->ms_ppath->mpp_inact)); 1487 1488 /* set lifetime of addr4 (meshSA) to initial value */ 1489 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1490 KASSERT(rt_meshsa != NULL, ("no route")); 1491 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1492 ms->ms_ppath->mpp_inact)); 1493 1494 mesh_forward(vap, m, mc); 1495 return (1); /* dont process locally */ 1496 } 1497 1498 /* 1499 * Verifies transmitter, updates lifetime, precursor list and process data 1500 * locally, if data is proxy with AE = 10 it could mean data should go 1501 * on another mesh path or data should be forwarded to the DS. 1502 * 1503 * > 0 means we have forwarded data and no need to process locally 1504 * == 0 means we want to process locally (and we may have forwarded data 1505 * < 0 means there was an error and data should be discarded 1506 */ 1507 static int 1508 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1509 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1510 { 1511 struct ieee80211_qosframe_addr4 *qwh; 1512 const struct ieee80211_meshcntl_ae10 *mc10; 1513 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1514 struct ieee80211_mesh_route *rt; 1515 int ae; 1516 1517 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1518 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1519 1520 /* 1521 * TODO: 1522 * o verify addr2 is a legitimate transmitter 1523 * o lifetime of precursor entry is max(init, curr) 1524 */ 1525 1526 /* set lifetime of addr4 (meshSA) to initial value */ 1527 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1528 KASSERT(rt != NULL, ("no route")); 1529 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1530 rt = NULL; 1531 1532 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1533 KASSERT(ae == IEEE80211_MESH_AE_00 || 1534 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1535 if (ae == IEEE80211_MESH_AE_10) { 1536 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1537 return (0); /* process locally */ 1538 } 1539 1540 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1541 if (rt != NULL && 1542 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1543 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1544 /* 1545 * Forward on another mesh-path, according to 1546 * amendment as specified in 9.32.4.1 1547 */ 1548 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1549 mesh_forward(vap, m, 1550 (const struct ieee80211_meshcntl *)mc10); 1551 return (1); /* dont process locally */ 1552 } 1553 /* 1554 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1555 * addressed according to 13.11.3.2. 1556 */ 1557 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1558 "forward frame to DS, SA(%6D) DA(%6D)", 1559 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1560 } 1561 return (0); /* process locally */ 1562 } 1563 1564 /* 1565 * Try to forward the group addressed data on to other mesh STAs, and 1566 * also to the DS. 1567 * 1568 * > 0 means we have forwarded data and no need to process locally 1569 * == 0 means we want to process locally (and we may have forwarded data 1570 * < 0 means there was an error and data should be discarded 1571 */ 1572 static int 1573 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1574 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1575 { 1576 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1577 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1578 1579 mesh_forward(vap, m, mc); 1580 1581 if(mc->mc_ttl > 0) { 1582 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1583 /* 1584 * Forward of MSDUs from the MBSS to DS group addressed 1585 * (according to 13.11.3.2) 1586 * This happens by delivering the packet, and a bridge 1587 * will sent it on another port member. 1588 */ 1589 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1590 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1591 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1592 MC01(mc)->mc_addr4, "%s", 1593 "forward from MBSS to the DS"); 1594 } 1595 } 1596 return (0); /* process locally */ 1597 #undef MC01 1598 } 1599 1600 static int 1601 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 1602 { 1603 #define HAS_SEQ(type) ((type & 0x4) == 0) 1604 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1605 #define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1606 struct ieee80211vap *vap = ni->ni_vap; 1607 struct ieee80211com *ic = ni->ni_ic; 1608 struct ifnet *ifp = vap->iv_ifp; 1609 struct ieee80211_frame *wh; 1610 const struct ieee80211_meshcntl *mc; 1611 int hdrspace, meshdrlen, need_tap, error; 1612 uint8_t dir, type, subtype, ae; 1613 uint32_t seq; 1614 const uint8_t *addr; 1615 uint8_t qos[2]; 1616 ieee80211_seq rxseq; 1617 1618 KASSERT(ni != NULL, ("null node")); 1619 ni->ni_inact = ni->ni_inact_reload; 1620 1621 need_tap = 1; /* mbuf need to be tapped. */ 1622 type = -1; /* undefined */ 1623 1624 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1625 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1626 ni->ni_macaddr, NULL, 1627 "too short (1): len %u", m->m_pkthdr.len); 1628 vap->iv_stats.is_rx_tooshort++; 1629 goto out; 1630 } 1631 /* 1632 * Bit of a cheat here, we use a pointer for a 3-address 1633 * frame format but don't reference fields past outside 1634 * ieee80211_frame_min w/o first validating the data is 1635 * present. 1636 */ 1637 wh = mtod(m, struct ieee80211_frame *); 1638 1639 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1640 IEEE80211_FC0_VERSION_0) { 1641 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1642 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1643 vap->iv_stats.is_rx_badversion++; 1644 goto err; 1645 } 1646 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1647 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1648 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1649 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1650 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1651 ni->ni_noise = nf; 1652 if (HAS_SEQ(type)) { 1653 uint8_t tid = ieee80211_gettid(wh); 1654 1655 if (IEEE80211_QOS_HAS_SEQ(wh) && 1656 TID_TO_WME_AC(tid) >= WME_AC_VI) 1657 ic->ic_wme.wme_hipri_traffic++; 1658 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1659 if (! ieee80211_check_rxseq(ni, wh)) { 1660 /* duplicate, discard */ 1661 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1662 wh->i_addr1, "duplicate", 1663 "seqno <%u,%u> fragno <%u,%u> tid %u", 1664 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1665 ni->ni_rxseqs[tid] >> 1666 IEEE80211_SEQ_SEQ_SHIFT, 1667 rxseq & IEEE80211_SEQ_FRAG_MASK, 1668 ni->ni_rxseqs[tid] & 1669 IEEE80211_SEQ_FRAG_MASK, 1670 tid); 1671 vap->iv_stats.is_rx_dup++; 1672 IEEE80211_NODE_STAT(ni, rx_dup); 1673 goto out; 1674 } 1675 ni->ni_rxseqs[tid] = rxseq; 1676 } 1677 } 1678 #ifdef IEEE80211_DEBUG 1679 /* 1680 * It's easier, but too expensive, to simulate different mesh 1681 * topologies by consulting the ACL policy very early, so do this 1682 * only under DEBUG. 1683 * 1684 * NB: this check is also done upon peering link initiation. 1685 */ 1686 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1687 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1688 wh, NULL, "%s", "disallowed by ACL"); 1689 vap->iv_stats.is_rx_acl++; 1690 goto out; 1691 } 1692 #endif 1693 switch (type) { 1694 case IEEE80211_FC0_TYPE_DATA: 1695 if (ni == vap->iv_bss) 1696 goto out; 1697 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1698 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1699 ni->ni_macaddr, NULL, 1700 "peer link not yet established (%d)", 1701 ni->ni_mlstate); 1702 vap->iv_stats.is_mesh_nolink++; 1703 goto out; 1704 } 1705 if (dir != IEEE80211_FC1_DIR_FROMDS && 1706 dir != IEEE80211_FC1_DIR_DSTODS) { 1707 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1708 wh, "data", "incorrect dir 0x%x", dir); 1709 vap->iv_stats.is_rx_wrongdir++; 1710 goto err; 1711 } 1712 1713 /* All Mesh data frames are QoS subtype */ 1714 if (!HAS_SEQ(type)) { 1715 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1716 wh, "data", "incorrect subtype 0x%x", subtype); 1717 vap->iv_stats.is_rx_badsubtype++; 1718 goto err; 1719 } 1720 1721 /* 1722 * Next up, any fragmentation. 1723 * XXX: we defrag before we even try to forward, 1724 * Mesh Control field is not present in sub-sequent 1725 * fragmented frames. This is in contrast to Draft 4.0. 1726 */ 1727 hdrspace = ieee80211_hdrspace(ic, wh); 1728 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1729 m = ieee80211_defrag(ni, m, hdrspace); 1730 if (m == NULL) { 1731 /* Fragment dropped or frame not complete yet */ 1732 goto out; 1733 } 1734 } 1735 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1736 1737 /* 1738 * Now we have a complete Mesh Data frame. 1739 */ 1740 1741 /* 1742 * Only fromDStoDS data frames use 4 address qos frames 1743 * as specified in amendment. Otherwise addr4 is located 1744 * in the Mesh Control field and a 3 address qos frame 1745 * is used. 1746 */ 1747 if (IEEE80211_IS_DSTODS(wh)) 1748 *(uint16_t *)qos = *(uint16_t *) 1749 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1750 else 1751 *(uint16_t *)qos = *(uint16_t *) 1752 ((struct ieee80211_qosframe *)wh)->i_qos; 1753 1754 /* 1755 * NB: The mesh STA sets the Mesh Control Present 1756 * subfield to 1 in the Mesh Data frame containing 1757 * an unfragmented MSDU, an A-MSDU, or the first 1758 * fragment of an MSDU. 1759 * After defrag it should always be present. 1760 */ 1761 if (!(qos[1] & IEEE80211_QOS_MC)) { 1762 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1763 ni->ni_macaddr, NULL, 1764 "%s", "Mesh control field not present"); 1765 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1766 goto err; 1767 } 1768 1769 /* pull up enough to get to the mesh control */ 1770 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1771 (m = m_pullup(m, hdrspace + 1772 sizeof(struct ieee80211_meshcntl))) == NULL) { 1773 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1774 ni->ni_macaddr, NULL, 1775 "data too short: expecting %u", hdrspace); 1776 vap->iv_stats.is_rx_tooshort++; 1777 goto out; /* XXX */ 1778 } 1779 /* 1780 * Now calculate the full extent of the headers. Note 1781 * mesh_decap will pull up anything we didn't get 1782 * above when it strips the 802.11 headers. 1783 */ 1784 mc = (const struct ieee80211_meshcntl *) 1785 (mtod(m, const uint8_t *) + hdrspace); 1786 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1787 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1788 ae * IEEE80211_ADDR_LEN; 1789 hdrspace += meshdrlen; 1790 1791 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1792 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1793 (m->m_len < hdrspace) && 1794 ((m = m_pullup(m, hdrspace)) == NULL)) { 1795 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1796 ni->ni_macaddr, NULL, 1797 "data too short: expecting %u", hdrspace); 1798 vap->iv_stats.is_rx_tooshort++; 1799 goto out; /* XXX */ 1800 } 1801 /* XXX: are we sure there is no reallocating after m_pullup? */ 1802 1803 seq = LE_READ_4(mc->mc_seq); 1804 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1805 addr = wh->i_addr3; 1806 else if (ae == IEEE80211_MESH_AE_01) 1807 addr = MC01(mc)->mc_addr4; 1808 else 1809 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1810 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1811 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1812 addr, "data", "%s", "not to me"); 1813 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1814 goto out; 1815 } 1816 if (mesh_checkpseq(vap, addr, seq) != 0) { 1817 vap->iv_stats.is_rx_dup++; 1818 goto out; 1819 } 1820 1821 /* This code "routes" the frame to the right control path */ 1822 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1823 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1824 error = 1825 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1826 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1827 error = mesh_recv_group_data(vap, m, wh, mc); 1828 else 1829 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1830 wh, mc); 1831 } else 1832 error = mesh_recv_group_data(vap, m, wh, mc); 1833 if (error < 0) 1834 goto err; 1835 else if (error > 0) 1836 goto out; 1837 1838 if (ieee80211_radiotap_active_vap(vap)) 1839 ieee80211_radiotap_rx(vap, m); 1840 need_tap = 0; 1841 1842 /* 1843 * Finally, strip the 802.11 header. 1844 */ 1845 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1846 if (m == NULL) { 1847 /* XXX mask bit to check for both */ 1848 /* don't count Null data frames as errors */ 1849 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1850 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1851 goto out; 1852 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1853 ni->ni_macaddr, "data", "%s", "decap error"); 1854 vap->iv_stats.is_rx_decap++; 1855 IEEE80211_NODE_STAT(ni, rx_decap); 1856 goto err; 1857 } 1858 if (qos[0] & IEEE80211_QOS_AMSDU) { 1859 m = ieee80211_decap_amsdu(ni, m); 1860 if (m == NULL) 1861 return IEEE80211_FC0_TYPE_DATA; 1862 } 1863 ieee80211_deliver_data(vap, ni, m); 1864 return type; 1865 case IEEE80211_FC0_TYPE_MGT: 1866 vap->iv_stats.is_rx_mgmt++; 1867 IEEE80211_NODE_STAT(ni, rx_mgmt); 1868 if (dir != IEEE80211_FC1_DIR_NODS) { 1869 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1870 wh, "mgt", "incorrect dir 0x%x", dir); 1871 vap->iv_stats.is_rx_wrongdir++; 1872 goto err; 1873 } 1874 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1875 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1876 ni->ni_macaddr, "mgt", "too short: len %u", 1877 m->m_pkthdr.len); 1878 vap->iv_stats.is_rx_tooshort++; 1879 goto out; 1880 } 1881 #ifdef IEEE80211_DEBUG 1882 if ((ieee80211_msg_debug(vap) && 1883 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1884 ieee80211_msg_dumppkts(vap)) { 1885 if_printf(ifp, "received %s from %s rssi %d\n", 1886 ieee80211_mgt_subtype_name[subtype >> 1887 IEEE80211_FC0_SUBTYPE_SHIFT], 1888 ether_sprintf(wh->i_addr2), rssi); 1889 } 1890 #endif 1891 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1892 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1893 wh, NULL, "%s", "WEP set but not permitted"); 1894 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1895 goto out; 1896 } 1897 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1898 goto out; 1899 case IEEE80211_FC0_TYPE_CTL: 1900 vap->iv_stats.is_rx_ctl++; 1901 IEEE80211_NODE_STAT(ni, rx_ctrl); 1902 goto out; 1903 default: 1904 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1905 wh, "bad", "frame type 0x%x", type); 1906 /* should not come here */ 1907 break; 1908 } 1909 err: 1910 ifp->if_ierrors++; 1911 out: 1912 if (m != NULL) { 1913 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1914 ieee80211_radiotap_rx(vap, m); 1915 m_freem(m); 1916 } 1917 return type; 1918 #undef HAS_SEQ 1919 #undef MC01 1920 #undef MC10 1921 } 1922 1923 static void 1924 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1925 int rssi, int nf) 1926 { 1927 struct ieee80211vap *vap = ni->ni_vap; 1928 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1929 struct ieee80211com *ic = ni->ni_ic; 1930 struct ieee80211_frame *wh; 1931 struct ieee80211_mesh_route *rt; 1932 uint8_t *frm, *efrm; 1933 1934 wh = mtod(m0, struct ieee80211_frame *); 1935 frm = (uint8_t *)&wh[1]; 1936 efrm = mtod(m0, uint8_t *) + m0->m_len; 1937 switch (subtype) { 1938 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1939 case IEEE80211_FC0_SUBTYPE_BEACON: 1940 { 1941 struct ieee80211_scanparams scan; 1942 /* 1943 * We process beacon/probe response 1944 * frames to discover neighbors. 1945 */ 1946 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1947 return; 1948 /* 1949 * Count frame now that we know it's to be processed. 1950 */ 1951 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1952 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1953 IEEE80211_NODE_STAT(ni, rx_beacons); 1954 } else 1955 IEEE80211_NODE_STAT(ni, rx_proberesp); 1956 /* 1957 * If scanning, just pass information to the scan module. 1958 */ 1959 if (ic->ic_flags & IEEE80211_F_SCAN) { 1960 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1961 /* 1962 * Actively scanning a channel marked passive; 1963 * send a probe request now that we know there 1964 * is 802.11 traffic present. 1965 * 1966 * XXX check if the beacon we recv'd gives 1967 * us what we need and suppress the probe req 1968 */ 1969 ieee80211_probe_curchan(vap, 1); 1970 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1971 } 1972 ieee80211_add_scan(vap, &scan, wh, 1973 subtype, rssi, nf); 1974 return; 1975 } 1976 1977 /* The rest of this code assumes we are running */ 1978 if (vap->iv_state != IEEE80211_S_RUN) 1979 return; 1980 /* 1981 * Ignore non-mesh STAs. 1982 */ 1983 if ((scan.capinfo & 1984 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1985 scan.meshid == NULL || scan.meshconf == NULL) { 1986 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1987 wh, "beacon", "%s", "not a mesh sta"); 1988 vap->iv_stats.is_mesh_wrongmesh++; 1989 return; 1990 } 1991 /* 1992 * Ignore STAs for other mesh networks. 1993 */ 1994 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1995 mesh_verify_meshconf(vap, scan.meshconf)) { 1996 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1997 wh, "beacon", "%s", "not for our mesh"); 1998 vap->iv_stats.is_mesh_wrongmesh++; 1999 return; 2000 } 2001 /* 2002 * Peer only based on the current ACL policy. 2003 */ 2004 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 2005 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 2006 wh, NULL, "%s", "disallowed by ACL"); 2007 vap->iv_stats.is_rx_acl++; 2008 return; 2009 } 2010 /* 2011 * Do neighbor discovery. 2012 */ 2013 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 2014 /* 2015 * Create a new entry in the neighbor table. 2016 */ 2017 ni = ieee80211_add_neighbor(vap, wh, &scan); 2018 } 2019 /* 2020 * Automatically peer with discovered nodes if possible. 2021 */ 2022 if (ni != vap->iv_bss && 2023 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 2024 switch (ni->ni_mlstate) { 2025 case IEEE80211_NODE_MESH_IDLE: 2026 { 2027 uint16_t args[1]; 2028 2029 /* Wait for backoff callout to reset counter */ 2030 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 2031 return; 2032 2033 ni->ni_mlpid = mesh_generateid(vap); 2034 if (ni->ni_mlpid == 0) 2035 return; 2036 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 2037 args[0] = ni->ni_mlpid; 2038 ieee80211_send_action(ni, 2039 IEEE80211_ACTION_CAT_SELF_PROT, 2040 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2041 ni->ni_mlrcnt = 0; 2042 mesh_peer_timeout_setup(ni); 2043 break; 2044 } 2045 case IEEE80211_NODE_MESH_ESTABLISHED: 2046 { 2047 /* 2048 * Valid beacon from a peer mesh STA 2049 * bump TA lifetime 2050 */ 2051 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 2052 if(rt != NULL) { 2053 ieee80211_mesh_rt_update(rt, 2054 ticks_to_msecs( 2055 ms->ms_ppath->mpp_inact)); 2056 } 2057 break; 2058 } 2059 default: 2060 break; /* ignore */ 2061 } 2062 } 2063 break; 2064 } 2065 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2066 { 2067 uint8_t *ssid, *meshid, *rates, *xrates; 2068 uint8_t *sfrm; 2069 2070 if (vap->iv_state != IEEE80211_S_RUN) { 2071 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2072 wh, NULL, "wrong state %s", 2073 ieee80211_state_name[vap->iv_state]); 2074 vap->iv_stats.is_rx_mgtdiscard++; 2075 return; 2076 } 2077 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 2078 /* frame must be directed */ 2079 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2080 wh, NULL, "%s", "not unicast"); 2081 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 2082 return; 2083 } 2084 /* 2085 * prreq frame format 2086 * [tlv] ssid 2087 * [tlv] supported rates 2088 * [tlv] extended supported rates 2089 * [tlv] mesh id 2090 */ 2091 ssid = meshid = rates = xrates = NULL; 2092 sfrm = frm; 2093 while (efrm - frm > 1) { 2094 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2095 switch (*frm) { 2096 case IEEE80211_ELEMID_SSID: 2097 ssid = frm; 2098 break; 2099 case IEEE80211_ELEMID_RATES: 2100 rates = frm; 2101 break; 2102 case IEEE80211_ELEMID_XRATES: 2103 xrates = frm; 2104 break; 2105 case IEEE80211_ELEMID_MESHID: 2106 meshid = frm; 2107 break; 2108 } 2109 frm += frm[1] + 2; 2110 } 2111 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2112 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2113 if (xrates != NULL) 2114 IEEE80211_VERIFY_ELEMENT(xrates, 2115 IEEE80211_RATE_MAXSIZE - rates[1], return); 2116 if (meshid != NULL) { 2117 IEEE80211_VERIFY_ELEMENT(meshid, 2118 IEEE80211_MESHID_LEN, return); 2119 /* NB: meshid, not ssid */ 2120 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2121 } 2122 2123 /* XXX find a better class or define it's own */ 2124 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2125 "%s", "recv probe req"); 2126 /* 2127 * Some legacy 11b clients cannot hack a complete 2128 * probe response frame. When the request includes 2129 * only a bare-bones rate set, communicate this to 2130 * the transmit side. 2131 */ 2132 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2133 break; 2134 } 2135 2136 case IEEE80211_FC0_SUBTYPE_ACTION: 2137 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2138 if (ni == vap->iv_bss) { 2139 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2140 wh, NULL, "%s", "unknown node"); 2141 vap->iv_stats.is_rx_mgtdiscard++; 2142 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2143 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2144 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2145 wh, NULL, "%s", "not for us"); 2146 vap->iv_stats.is_rx_mgtdiscard++; 2147 } else if (vap->iv_state != IEEE80211_S_RUN) { 2148 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2149 wh, NULL, "wrong state %s", 2150 ieee80211_state_name[vap->iv_state]); 2151 vap->iv_stats.is_rx_mgtdiscard++; 2152 } else { 2153 if (ieee80211_parse_action(ni, m0) == 0) 2154 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2155 } 2156 break; 2157 2158 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2159 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2160 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2161 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2162 case IEEE80211_FC0_SUBTYPE_ATIM: 2163 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2164 case IEEE80211_FC0_SUBTYPE_AUTH: 2165 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2166 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2167 wh, NULL, "%s", "not handled"); 2168 vap->iv_stats.is_rx_mgtdiscard++; 2169 break; 2170 2171 default: 2172 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2173 wh, "mgt", "subtype 0x%x not handled", subtype); 2174 vap->iv_stats.is_rx_badsubtype++; 2175 break; 2176 } 2177 } 2178 2179 static void 2180 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2181 { 2182 2183 switch (subtype) { 2184 case IEEE80211_FC0_SUBTYPE_BAR: 2185 ieee80211_recv_bar(ni, m); 2186 break; 2187 } 2188 } 2189 2190 /* 2191 * Parse meshpeering action ie's for MPM frames 2192 */ 2193 static const struct ieee80211_meshpeer_ie * 2194 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2195 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2196 const uint8_t *frm, const uint8_t *efrm, 2197 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2198 { 2199 struct ieee80211vap *vap = ni->ni_vap; 2200 const struct ieee80211_meshpeer_ie *mpie; 2201 uint16_t args[3]; 2202 const uint8_t *meshid, *meshconf, *meshpeer; 2203 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2204 2205 meshid = meshconf = meshpeer = NULL; 2206 while (efrm - frm > 1) { 2207 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2208 switch (*frm) { 2209 case IEEE80211_ELEMID_MESHID: 2210 meshid = frm; 2211 break; 2212 case IEEE80211_ELEMID_MESHCONF: 2213 meshconf = frm; 2214 break; 2215 case IEEE80211_ELEMID_MESHPEER: 2216 meshpeer = frm; 2217 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2218 memset(mp, 0, sizeof(*mp)); 2219 mp->peer_len = mpie->peer_len; 2220 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 2221 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 2222 switch (subtype) { 2223 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2224 mp->peer_linkid = 2225 LE_READ_2(&mpie->peer_linkid); 2226 break; 2227 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2228 /* NB: peer link ID is optional */ 2229 if (mpie->peer_len == 2230 (IEEE80211_MPM_BASE_SZ + 2)) { 2231 mp->peer_linkid = 0; 2232 mp->peer_rcode = 2233 LE_READ_2(&mpie->peer_linkid); 2234 } else { 2235 mp->peer_linkid = 2236 LE_READ_2(&mpie->peer_linkid); 2237 mp->peer_rcode = 2238 LE_READ_2(&mpie->peer_rcode); 2239 } 2240 break; 2241 } 2242 break; 2243 } 2244 frm += frm[1] + 2; 2245 } 2246 2247 /* 2248 * Verify the contents of the frame. 2249 * If it fails validation, close the peer link. 2250 */ 2251 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2252 sendclose = 1; 2253 IEEE80211_DISCARD(vap, 2254 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2255 wh, NULL, "%s", "MPM validation failed"); 2256 } 2257 2258 /* If meshid is not the same reject any frames type. */ 2259 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2260 sendclose = 1; 2261 IEEE80211_DISCARD(vap, 2262 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2263 wh, NULL, "%s", "not for our mesh"); 2264 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2265 /* 2266 * Standard not clear about this, if we dont ignore 2267 * there will be an endless loop between nodes sending 2268 * CLOSE frames between each other with wrong meshid. 2269 * Discard and timers will bring FSM to IDLE state. 2270 */ 2271 return NULL; 2272 } 2273 } 2274 2275 /* 2276 * Close frames are accepted if meshid is the same. 2277 * Verify the other two types. 2278 */ 2279 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2280 mesh_verify_meshconf(vap, meshconf)) { 2281 sendclose = 1; 2282 IEEE80211_DISCARD(vap, 2283 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2284 wh, NULL, "%s", "configuration missmatch"); 2285 } 2286 2287 if (sendclose) { 2288 vap->iv_stats.is_rx_mgtdiscard++; 2289 switch (ni->ni_mlstate) { 2290 case IEEE80211_NODE_MESH_IDLE: 2291 case IEEE80211_NODE_MESH_ESTABLISHED: 2292 case IEEE80211_NODE_MESH_HOLDING: 2293 /* ignore */ 2294 break; 2295 case IEEE80211_NODE_MESH_OPENSNT: 2296 case IEEE80211_NODE_MESH_OPENRCV: 2297 case IEEE80211_NODE_MESH_CONFIRMRCV: 2298 args[0] = ni->ni_mlpid; 2299 args[1] = ni->ni_mllid; 2300 /* Reason codes for rejection */ 2301 switch (subtype) { 2302 case IEEE80211_ACTION_MESHPEERING_OPEN: 2303 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2304 break; 2305 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2306 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2307 break; 2308 } 2309 ieee80211_send_action(ni, 2310 IEEE80211_ACTION_CAT_SELF_PROT, 2311 IEEE80211_ACTION_MESHPEERING_CLOSE, 2312 args); 2313 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2314 mesh_peer_timeout_setup(ni); 2315 break; 2316 } 2317 return NULL; 2318 } 2319 2320 return (const struct ieee80211_meshpeer_ie *) mp; 2321 } 2322 2323 static int 2324 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2325 const struct ieee80211_frame *wh, 2326 const uint8_t *frm, const uint8_t *efrm) 2327 { 2328 struct ieee80211vap *vap = ni->ni_vap; 2329 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2330 struct ieee80211_meshpeer_ie ie; 2331 const struct ieee80211_meshpeer_ie *meshpeer; 2332 uint16_t args[3]; 2333 2334 /* +2+2 for action + code + capabilites */ 2335 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2336 IEEE80211_ACTION_MESHPEERING_OPEN); 2337 if (meshpeer == NULL) { 2338 return 0; 2339 } 2340 2341 /* XXX move up */ 2342 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2343 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2344 2345 switch (ni->ni_mlstate) { 2346 case IEEE80211_NODE_MESH_IDLE: 2347 /* Reject open request if reached our maximum neighbor count */ 2348 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2349 args[0] = meshpeer->peer_llinkid; 2350 args[1] = 0; 2351 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2352 ieee80211_send_action(ni, 2353 IEEE80211_ACTION_CAT_SELF_PROT, 2354 IEEE80211_ACTION_MESHPEERING_CLOSE, 2355 args); 2356 /* stay in IDLE state */ 2357 return (0); 2358 } 2359 /* Open frame accepted */ 2360 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2361 ni->ni_mllid = meshpeer->peer_llinkid; 2362 ni->ni_mlpid = mesh_generateid(vap); 2363 if (ni->ni_mlpid == 0) 2364 return 0; /* XXX */ 2365 args[0] = ni->ni_mlpid; 2366 /* Announce we're open too... */ 2367 ieee80211_send_action(ni, 2368 IEEE80211_ACTION_CAT_SELF_PROT, 2369 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2370 /* ...and confirm the link. */ 2371 args[0] = ni->ni_mlpid; 2372 args[1] = ni->ni_mllid; 2373 ieee80211_send_action(ni, 2374 IEEE80211_ACTION_CAT_SELF_PROT, 2375 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2376 args); 2377 mesh_peer_timeout_setup(ni); 2378 break; 2379 case IEEE80211_NODE_MESH_OPENRCV: 2380 /* Wrong Link ID */ 2381 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2382 args[0] = ni->ni_mllid; 2383 args[1] = ni->ni_mlpid; 2384 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2385 ieee80211_send_action(ni, 2386 IEEE80211_ACTION_CAT_SELF_PROT, 2387 IEEE80211_ACTION_MESHPEERING_CLOSE, 2388 args); 2389 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2390 mesh_peer_timeout_setup(ni); 2391 break; 2392 } 2393 /* Duplicate open, confirm again. */ 2394 args[0] = ni->ni_mlpid; 2395 args[1] = ni->ni_mllid; 2396 ieee80211_send_action(ni, 2397 IEEE80211_ACTION_CAT_SELF_PROT, 2398 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2399 args); 2400 break; 2401 case IEEE80211_NODE_MESH_OPENSNT: 2402 ni->ni_mllid = meshpeer->peer_llinkid; 2403 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2404 args[0] = ni->ni_mlpid; 2405 args[1] = ni->ni_mllid; 2406 ieee80211_send_action(ni, 2407 IEEE80211_ACTION_CAT_SELF_PROT, 2408 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2409 args); 2410 /* NB: don't setup/clear any timeout */ 2411 break; 2412 case IEEE80211_NODE_MESH_CONFIRMRCV: 2413 if (ni->ni_mlpid != meshpeer->peer_linkid || 2414 ni->ni_mllid != meshpeer->peer_llinkid) { 2415 args[0] = ni->ni_mlpid; 2416 args[1] = ni->ni_mllid; 2417 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2418 ieee80211_send_action(ni, 2419 IEEE80211_ACTION_CAT_SELF_PROT, 2420 IEEE80211_ACTION_MESHPEERING_CLOSE, 2421 args); 2422 mesh_linkchange(ni, 2423 IEEE80211_NODE_MESH_HOLDING); 2424 mesh_peer_timeout_setup(ni); 2425 break; 2426 } 2427 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2428 ni->ni_mllid = meshpeer->peer_llinkid; 2429 args[0] = ni->ni_mlpid; 2430 args[1] = ni->ni_mllid; 2431 ieee80211_send_action(ni, 2432 IEEE80211_ACTION_CAT_SELF_PROT, 2433 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2434 args); 2435 mesh_peer_timeout_stop(ni); 2436 break; 2437 case IEEE80211_NODE_MESH_ESTABLISHED: 2438 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2439 args[0] = ni->ni_mllid; 2440 args[1] = ni->ni_mlpid; 2441 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2442 ieee80211_send_action(ni, 2443 IEEE80211_ACTION_CAT_SELF_PROT, 2444 IEEE80211_ACTION_MESHPEERING_CLOSE, 2445 args); 2446 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2447 mesh_peer_timeout_setup(ni); 2448 break; 2449 } 2450 args[0] = ni->ni_mlpid; 2451 args[1] = ni->ni_mllid; 2452 ieee80211_send_action(ni, 2453 IEEE80211_ACTION_CAT_SELF_PROT, 2454 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2455 args); 2456 break; 2457 case IEEE80211_NODE_MESH_HOLDING: 2458 args[0] = ni->ni_mlpid; 2459 args[1] = meshpeer->peer_llinkid; 2460 /* Standard not clear about what the reaason code should be */ 2461 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2462 ieee80211_send_action(ni, 2463 IEEE80211_ACTION_CAT_SELF_PROT, 2464 IEEE80211_ACTION_MESHPEERING_CLOSE, 2465 args); 2466 break; 2467 } 2468 return 0; 2469 } 2470 2471 static int 2472 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2473 const struct ieee80211_frame *wh, 2474 const uint8_t *frm, const uint8_t *efrm) 2475 { 2476 struct ieee80211vap *vap = ni->ni_vap; 2477 struct ieee80211_meshpeer_ie ie; 2478 const struct ieee80211_meshpeer_ie *meshpeer; 2479 uint16_t args[3]; 2480 2481 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2482 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2483 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2484 if (meshpeer == NULL) { 2485 return 0; 2486 } 2487 2488 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2489 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2490 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2491 2492 switch (ni->ni_mlstate) { 2493 case IEEE80211_NODE_MESH_OPENRCV: 2494 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2495 mesh_peer_timeout_stop(ni); 2496 break; 2497 case IEEE80211_NODE_MESH_OPENSNT: 2498 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2499 mesh_peer_timeout_setup(ni); 2500 break; 2501 case IEEE80211_NODE_MESH_HOLDING: 2502 args[0] = ni->ni_mlpid; 2503 args[1] = meshpeer->peer_llinkid; 2504 /* Standard not clear about what the reaason code should be */ 2505 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2506 ieee80211_send_action(ni, 2507 IEEE80211_ACTION_CAT_SELF_PROT, 2508 IEEE80211_ACTION_MESHPEERING_CLOSE, 2509 args); 2510 break; 2511 case IEEE80211_NODE_MESH_CONFIRMRCV: 2512 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2513 args[0] = ni->ni_mlpid; 2514 args[1] = ni->ni_mllid; 2515 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2516 ieee80211_send_action(ni, 2517 IEEE80211_ACTION_CAT_SELF_PROT, 2518 IEEE80211_ACTION_MESHPEERING_CLOSE, 2519 args); 2520 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2521 mesh_peer_timeout_setup(ni); 2522 } 2523 break; 2524 default: 2525 IEEE80211_DISCARD(vap, 2526 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2527 wh, NULL, "received confirm in invalid state %d", 2528 ni->ni_mlstate); 2529 vap->iv_stats.is_rx_mgtdiscard++; 2530 break; 2531 } 2532 return 0; 2533 } 2534 2535 static int 2536 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2537 const struct ieee80211_frame *wh, 2538 const uint8_t *frm, const uint8_t *efrm) 2539 { 2540 struct ieee80211_meshpeer_ie ie; 2541 const struct ieee80211_meshpeer_ie *meshpeer; 2542 uint16_t args[3]; 2543 2544 /* +2 for action + code */ 2545 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2546 IEEE80211_ACTION_MESHPEERING_CLOSE); 2547 if (meshpeer == NULL) { 2548 return 0; 2549 } 2550 2551 /* 2552 * XXX: check reason code, for example we could receive 2553 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2554 * to peer again. 2555 */ 2556 2557 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2558 ni, "%s", "recv PEER CLOSE"); 2559 2560 switch (ni->ni_mlstate) { 2561 case IEEE80211_NODE_MESH_IDLE: 2562 /* ignore */ 2563 break; 2564 case IEEE80211_NODE_MESH_OPENRCV: 2565 case IEEE80211_NODE_MESH_OPENSNT: 2566 case IEEE80211_NODE_MESH_CONFIRMRCV: 2567 case IEEE80211_NODE_MESH_ESTABLISHED: 2568 args[0] = ni->ni_mlpid; 2569 args[1] = ni->ni_mllid; 2570 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2571 ieee80211_send_action(ni, 2572 IEEE80211_ACTION_CAT_SELF_PROT, 2573 IEEE80211_ACTION_MESHPEERING_CLOSE, 2574 args); 2575 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2576 mesh_peer_timeout_setup(ni); 2577 break; 2578 case IEEE80211_NODE_MESH_HOLDING: 2579 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2580 mesh_peer_timeout_stop(ni); 2581 break; 2582 } 2583 return 0; 2584 } 2585 2586 /* 2587 * Link Metric handling. 2588 */ 2589 static int 2590 mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2591 const struct ieee80211_frame *wh, 2592 const uint8_t *frm, const uint8_t *efrm) 2593 { 2594 const struct ieee80211_meshlmetric_ie *ie = 2595 (const struct ieee80211_meshlmetric_ie *) 2596 (frm+2); /* action + code */ 2597 struct ieee80211_meshlmetric_ie lm_rep; 2598 2599 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2600 lm_rep.lm_flags = 0; 2601 lm_rep.lm_metric = mesh_airtime_calc(ni); 2602 ieee80211_send_action(ni, 2603 IEEE80211_ACTION_CAT_MESH, 2604 IEEE80211_ACTION_MESH_LMETRIC, 2605 &lm_rep); 2606 } 2607 /* XXX: else do nothing for now */ 2608 return 0; 2609 } 2610 2611 /* 2612 * Parse meshgate action ie's for GANN frames. 2613 * Returns -1 if parsing fails, otherwise 0. 2614 */ 2615 static int 2616 mesh_parse_meshgate_action(struct ieee80211_node *ni, 2617 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2618 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2619 { 2620 struct ieee80211vap *vap = ni->ni_vap; 2621 const struct ieee80211_meshgann_ie *gannie; 2622 2623 while (efrm - frm > 1) { 2624 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2625 switch (*frm) { 2626 case IEEE80211_ELEMID_MESHGANN: 2627 gannie = (const struct ieee80211_meshgann_ie *) frm; 2628 memset(ie, 0, sizeof(*ie)); 2629 ie->gann_ie = gannie->gann_ie; 2630 ie->gann_len = gannie->gann_len; 2631 ie->gann_flags = gannie->gann_flags; 2632 ie->gann_hopcount = gannie->gann_hopcount; 2633 ie->gann_ttl = gannie->gann_ttl; 2634 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2635 ie->gann_seq = LE_READ_4(&gannie->gann_seq); 2636 ie->gann_interval = LE_READ_2(&gannie->gann_interval); 2637 break; 2638 } 2639 frm += frm[1] + 2; 2640 } 2641 2642 return 0; 2643 } 2644 2645 /* 2646 * Mesh Gate Announcement handling. 2647 */ 2648 static int 2649 mesh_recv_action_meshgate(struct ieee80211_node *ni, 2650 const struct ieee80211_frame *wh, 2651 const uint8_t *frm, const uint8_t *efrm) 2652 { 2653 struct ieee80211vap *vap = ni->ni_vap; 2654 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2655 struct ieee80211_mesh_gate_route *gr, *next; 2656 struct ieee80211_mesh_route *rt_gate; 2657 struct ieee80211_meshgann_ie pgann; 2658 struct ieee80211_meshgann_ie ie; 2659 int found = 0; 2660 2661 /* +2 for action + code */ 2662 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2663 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2664 ni->ni_macaddr, NULL, "%s", 2665 "GANN parsing failed"); 2666 vap->iv_stats.is_rx_mgtdiscard++; 2667 return (0); 2668 } 2669 2670 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2671 return 0; 2672 2673 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2674 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2675 ie.gann_seq); 2676 2677 if (ms == NULL) 2678 return (0); 2679 MESH_RT_LOCK(ms); 2680 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2681 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2682 continue; 2683 if (ie.gann_seq <= gr->gr_lastseq) { 2684 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2685 ni->ni_macaddr, NULL, 2686 "GANN old seqno %u <= %u", 2687 ie.gann_seq, gr->gr_lastseq); 2688 MESH_RT_UNLOCK(ms); 2689 return (0); 2690 } 2691 /* corresponding mesh gate found & GANN accepted */ 2692 found = 1; 2693 break; 2694 2695 } 2696 if (found == 0) { 2697 /* this GANN is from a new mesh Gate add it to known table. */ 2698 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2699 "stored new GANN information, seq %u.", ie.gann_seq); 2700 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2701 M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO); 2702 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2703 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2704 } 2705 gr->gr_lastseq = ie.gann_seq; 2706 2707 /* check if we have a path to this gate */ 2708 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2709 if (rt_gate != NULL && 2710 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2711 gr->gr_route = rt_gate; 2712 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2713 } 2714 2715 MESH_RT_UNLOCK(ms); 2716 2717 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2718 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2719 return 0; 2720 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2721 pgann.gann_hopcount = ie.gann_hopcount + 1; 2722 pgann.gann_ttl = ie.gann_ttl - 1; 2723 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2724 pgann.gann_seq = ie.gann_seq; 2725 pgann.gann_interval = ie.gann_interval; 2726 2727 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2728 "%s", "propagate GANN"); 2729 2730 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2731 IEEE80211_ACTION_MESH_GANN, &pgann); 2732 2733 return 0; 2734 } 2735 2736 static int 2737 mesh_send_action(struct ieee80211_node *ni, 2738 const uint8_t sa[IEEE80211_ADDR_LEN], 2739 const uint8_t da[IEEE80211_ADDR_LEN], 2740 struct mbuf *m) 2741 { 2742 struct ieee80211vap *vap = ni->ni_vap; 2743 struct ieee80211com *ic = ni->ni_ic; 2744 struct ieee80211_bpf_params params; 2745 struct ieee80211_frame *wh; 2746 2747 KASSERT(ni != NULL, ("null node")); 2748 2749 if (vap->iv_state == IEEE80211_S_CAC) { 2750 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2751 "block %s frame in CAC state", "Mesh action"); 2752 vap->iv_stats.is_tx_badstate++; 2753 ieee80211_free_node(ni); 2754 m_freem(m); 2755 return EIO; /* XXX */ 2756 } 2757 2758 M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 2759 if (m == NULL) { 2760 ieee80211_free_node(ni); 2761 return ENOMEM; 2762 } 2763 2764 wh = mtod(m, struct ieee80211_frame *); 2765 ieee80211_send_setup(ni, m, 2766 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2767 IEEE80211_NONQOS_TID, sa, da, sa); 2768 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2769 2770 memset(¶ms, 0, sizeof(params)); 2771 params.ibp_pri = WME_AC_VO; 2772 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2773 if (IEEE80211_IS_MULTICAST(da)) 2774 params.ibp_try0 = 1; 2775 else 2776 params.ibp_try0 = ni->ni_txparms->maxretry; 2777 params.ibp_power = ni->ni_txpower; 2778 2779 IEEE80211_NODE_STAT(ni, tx_mgmt); 2780 2781 return ic->ic_raw_xmit(ni, m, ¶ms); 2782 } 2783 2784 #define ADDSHORT(frm, v) do { \ 2785 frm[0] = (v) & 0xff; \ 2786 frm[1] = (v) >> 8; \ 2787 frm += 2; \ 2788 } while (0) 2789 #define ADDWORD(frm, v) do { \ 2790 frm[0] = (v) & 0xff; \ 2791 frm[1] = ((v) >> 8) & 0xff; \ 2792 frm[2] = ((v) >> 16) & 0xff; \ 2793 frm[3] = ((v) >> 24) & 0xff; \ 2794 frm += 4; \ 2795 } while (0) 2796 2797 static int 2798 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2799 int category, int action, void *args0) 2800 { 2801 struct ieee80211vap *vap = ni->ni_vap; 2802 struct ieee80211com *ic = ni->ni_ic; 2803 uint16_t *args = args0; 2804 const struct ieee80211_rateset *rs; 2805 struct mbuf *m; 2806 uint8_t *frm; 2807 2808 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2809 "send PEER OPEN action: localid 0x%x", args[0]); 2810 2811 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2812 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2813 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2814 ieee80211_ref_node(ni); 2815 2816 m = ieee80211_getmgtframe(&frm, 2817 ic->ic_headroom + sizeof(struct ieee80211_frame), 2818 sizeof(uint16_t) /* action+category */ 2819 + sizeof(uint16_t) /* capabilites */ 2820 + 2 + IEEE80211_RATE_SIZE 2821 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2822 + 2 + IEEE80211_MESHID_LEN 2823 + sizeof(struct ieee80211_meshconf_ie) 2824 + sizeof(struct ieee80211_meshpeer_ie) 2825 ); 2826 if (m != NULL) { 2827 /* 2828 * mesh peer open action frame format: 2829 * [1] category 2830 * [1] action 2831 * [2] capabilities 2832 * [tlv] rates 2833 * [tlv] xrates 2834 * [tlv] mesh id 2835 * [tlv] mesh conf 2836 * [tlv] mesh peer link mgmt 2837 */ 2838 *frm++ = category; 2839 *frm++ = action; 2840 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2841 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2842 frm = ieee80211_add_rates(frm, rs); 2843 frm = ieee80211_add_xrates(frm, rs); 2844 frm = ieee80211_add_meshid(frm, vap); 2845 frm = ieee80211_add_meshconf(frm, vap); 2846 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2847 args[0], 0, 0); 2848 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2849 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2850 } else { 2851 vap->iv_stats.is_tx_nobuf++; 2852 ieee80211_free_node(ni); 2853 return ENOMEM; 2854 } 2855 } 2856 2857 static int 2858 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2859 int category, int action, void *args0) 2860 { 2861 struct ieee80211vap *vap = ni->ni_vap; 2862 struct ieee80211com *ic = ni->ni_ic; 2863 uint16_t *args = args0; 2864 const struct ieee80211_rateset *rs; 2865 struct mbuf *m; 2866 uint8_t *frm; 2867 2868 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2869 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2870 args[0], args[1]); 2871 2872 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2873 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2874 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2875 ieee80211_ref_node(ni); 2876 2877 m = ieee80211_getmgtframe(&frm, 2878 ic->ic_headroom + sizeof(struct ieee80211_frame), 2879 sizeof(uint16_t) /* action+category */ 2880 + sizeof(uint16_t) /* capabilites */ 2881 + sizeof(uint16_t) /* status code */ 2882 + sizeof(uint16_t) /* AID */ 2883 + 2 + IEEE80211_RATE_SIZE 2884 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2885 + 2 + IEEE80211_MESHID_LEN 2886 + sizeof(struct ieee80211_meshconf_ie) 2887 + sizeof(struct ieee80211_meshpeer_ie) 2888 ); 2889 if (m != NULL) { 2890 /* 2891 * mesh peer confirm action frame format: 2892 * [1] category 2893 * [1] action 2894 * [2] capabilities 2895 * [2] status code 2896 * [2] association id (peer ID) 2897 * [tlv] rates 2898 * [tlv] xrates 2899 * [tlv] mesh id 2900 * [tlv] mesh conf 2901 * [tlv] mesh peer link mgmt 2902 */ 2903 *frm++ = category; 2904 *frm++ = action; 2905 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2906 ADDSHORT(frm, 0); /* status code */ 2907 ADDSHORT(frm, args[1]); /* AID */ 2908 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2909 frm = ieee80211_add_rates(frm, rs); 2910 frm = ieee80211_add_xrates(frm, rs); 2911 frm = ieee80211_add_meshid(frm, vap); 2912 frm = ieee80211_add_meshconf(frm, vap); 2913 frm = ieee80211_add_meshpeer(frm, 2914 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2915 args[0], args[1], 0); 2916 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2917 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2918 } else { 2919 vap->iv_stats.is_tx_nobuf++; 2920 ieee80211_free_node(ni); 2921 return ENOMEM; 2922 } 2923 } 2924 2925 static int 2926 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2927 int category, int action, void *args0) 2928 { 2929 struct ieee80211vap *vap = ni->ni_vap; 2930 struct ieee80211com *ic = ni->ni_ic; 2931 uint16_t *args = args0; 2932 struct mbuf *m; 2933 uint8_t *frm; 2934 2935 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2936 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2937 args[0], args[1], args[2]); 2938 2939 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2940 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2941 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2942 ieee80211_ref_node(ni); 2943 2944 m = ieee80211_getmgtframe(&frm, 2945 ic->ic_headroom + sizeof(struct ieee80211_frame), 2946 sizeof(uint16_t) /* action+category */ 2947 + sizeof(uint16_t) /* reason code */ 2948 + 2 + IEEE80211_MESHID_LEN 2949 + sizeof(struct ieee80211_meshpeer_ie) 2950 ); 2951 if (m != NULL) { 2952 /* 2953 * mesh peer close action frame format: 2954 * [1] category 2955 * [1] action 2956 * [tlv] mesh id 2957 * [tlv] mesh peer link mgmt 2958 */ 2959 *frm++ = category; 2960 *frm++ = action; 2961 frm = ieee80211_add_meshid(frm, vap); 2962 frm = ieee80211_add_meshpeer(frm, 2963 IEEE80211_ACTION_MESHPEERING_CLOSE, 2964 args[0], args[1], args[2]); 2965 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2966 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2967 } else { 2968 vap->iv_stats.is_tx_nobuf++; 2969 ieee80211_free_node(ni); 2970 return ENOMEM; 2971 } 2972 } 2973 2974 static int 2975 mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2976 int category, int action, void *arg0) 2977 { 2978 struct ieee80211vap *vap = ni->ni_vap; 2979 struct ieee80211com *ic = ni->ni_ic; 2980 struct ieee80211_meshlmetric_ie *ie = arg0; 2981 struct mbuf *m; 2982 uint8_t *frm; 2983 2984 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2985 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2986 ni, "%s", "send LINK METRIC REQUEST action"); 2987 } else { 2988 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2989 ni, "send LINK METRIC REPLY action: metric 0x%x", 2990 ie->lm_metric); 2991 } 2992 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2993 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2994 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2995 ieee80211_ref_node(ni); 2996 2997 m = ieee80211_getmgtframe(&frm, 2998 ic->ic_headroom + sizeof(struct ieee80211_frame), 2999 sizeof(uint16_t) + /* action+category */ 3000 sizeof(struct ieee80211_meshlmetric_ie) 3001 ); 3002 if (m != NULL) { 3003 /* 3004 * mesh link metric 3005 * [1] category 3006 * [1] action 3007 * [tlv] mesh link metric 3008 */ 3009 *frm++ = category; 3010 *frm++ = action; 3011 frm = ieee80211_add_meshlmetric(frm, 3012 ie->lm_flags, ie->lm_metric); 3013 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3014 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 3015 } else { 3016 vap->iv_stats.is_tx_nobuf++; 3017 ieee80211_free_node(ni); 3018 return ENOMEM; 3019 } 3020 } 3021 3022 static int 3023 mesh_send_action_meshgate(struct ieee80211_node *ni, 3024 int category, int action, void *arg0) 3025 { 3026 struct ieee80211vap *vap = ni->ni_vap; 3027 struct ieee80211com *ic = ni->ni_ic; 3028 struct ieee80211_meshgann_ie *ie = arg0; 3029 struct mbuf *m; 3030 uint8_t *frm; 3031 3032 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3033 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 3034 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 3035 ieee80211_ref_node(ni); 3036 3037 m = ieee80211_getmgtframe(&frm, 3038 ic->ic_headroom + sizeof(struct ieee80211_frame), 3039 sizeof(uint16_t) + /* action+category */ 3040 IEEE80211_MESHGANN_BASE_SZ 3041 ); 3042 if (m != NULL) { 3043 /* 3044 * mesh link metric 3045 * [1] category 3046 * [1] action 3047 * [tlv] mesh gate annoucement 3048 */ 3049 *frm++ = category; 3050 *frm++ = action; 3051 frm = ieee80211_add_meshgate(frm, ie); 3052 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3053 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 3054 } else { 3055 vap->iv_stats.is_tx_nobuf++; 3056 ieee80211_free_node(ni); 3057 return ENOMEM; 3058 } 3059 } 3060 3061 static void 3062 mesh_peer_timeout_setup(struct ieee80211_node *ni) 3063 { 3064 switch (ni->ni_mlstate) { 3065 case IEEE80211_NODE_MESH_HOLDING: 3066 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 3067 break; 3068 case IEEE80211_NODE_MESH_CONFIRMRCV: 3069 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 3070 break; 3071 case IEEE80211_NODE_MESH_IDLE: 3072 ni->ni_mltval = 0; 3073 break; 3074 default: 3075 ni->ni_mltval = ieee80211_mesh_retrytimeout; 3076 break; 3077 } 3078 if (ni->ni_mltval) 3079 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 3080 mesh_peer_timeout_cb, ni); 3081 } 3082 3083 /* 3084 * Same as above but backoffs timer statisically 50%. 3085 */ 3086 static void 3087 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3088 { 3089 uint32_t r; 3090 3091 r = arc4random(); 3092 ni->ni_mltval += r % ni->ni_mltval; 3093 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3094 ni); 3095 } 3096 3097 static __inline void 3098 mesh_peer_timeout_stop(struct ieee80211_node *ni) 3099 { 3100 callout_drain(&ni->ni_mltimer); 3101 } 3102 3103 static void 3104 mesh_peer_backoff_cb(void *arg) 3105 { 3106 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3107 3108 /* After backoff timeout, try to peer automatically again. */ 3109 ni->ni_mlhcnt = 0; 3110 } 3111 3112 /* 3113 * Mesh Peer Link Management FSM timeout handling. 3114 */ 3115 static void 3116 mesh_peer_timeout_cb(void *arg) 3117 { 3118 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3119 uint16_t args[3]; 3120 3121 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3122 ni, "mesh link timeout, state %d, retry counter %d", 3123 ni->ni_mlstate, ni->ni_mlrcnt); 3124 3125 switch (ni->ni_mlstate) { 3126 case IEEE80211_NODE_MESH_IDLE: 3127 case IEEE80211_NODE_MESH_ESTABLISHED: 3128 break; 3129 case IEEE80211_NODE_MESH_OPENSNT: 3130 case IEEE80211_NODE_MESH_OPENRCV: 3131 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3132 args[0] = ni->ni_mlpid; 3133 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3134 ieee80211_send_action(ni, 3135 IEEE80211_ACTION_CAT_SELF_PROT, 3136 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3137 ni->ni_mlrcnt = 0; 3138 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3139 mesh_peer_timeout_setup(ni); 3140 } else { 3141 args[0] = ni->ni_mlpid; 3142 ieee80211_send_action(ni, 3143 IEEE80211_ACTION_CAT_SELF_PROT, 3144 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3145 ni->ni_mlrcnt++; 3146 mesh_peer_timeout_backoff(ni); 3147 } 3148 break; 3149 case IEEE80211_NODE_MESH_CONFIRMRCV: 3150 args[0] = ni->ni_mlpid; 3151 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3152 ieee80211_send_action(ni, 3153 IEEE80211_ACTION_CAT_SELF_PROT, 3154 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3155 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3156 mesh_peer_timeout_setup(ni); 3157 break; 3158 case IEEE80211_NODE_MESH_HOLDING: 3159 ni->ni_mlhcnt++; 3160 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3161 callout_reset(&ni->ni_mlhtimer, 3162 ieee80211_mesh_backofftimeout, 3163 mesh_peer_backoff_cb, ni); 3164 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3165 break; 3166 } 3167 } 3168 3169 static int 3170 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3171 { 3172 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3173 3174 if (ie == NULL || ie[1] != ms->ms_idlen) 3175 return 1; 3176 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3177 } 3178 3179 /* 3180 * Check if we are using the same algorithms for this mesh. 3181 */ 3182 static int 3183 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3184 { 3185 const struct ieee80211_meshconf_ie *meshconf = 3186 (const struct ieee80211_meshconf_ie *) ie; 3187 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3188 3189 if (meshconf == NULL) 3190 return 1; 3191 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3192 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3193 "unknown path selection algorithm: 0x%x\n", 3194 meshconf->conf_pselid); 3195 return 1; 3196 } 3197 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3198 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3199 "unknown path metric algorithm: 0x%x\n", 3200 meshconf->conf_pmetid); 3201 return 1; 3202 } 3203 if (meshconf->conf_ccid != 0) { 3204 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3205 "unknown congestion control algorithm: 0x%x\n", 3206 meshconf->conf_ccid); 3207 return 1; 3208 } 3209 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3210 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3211 "unknown sync algorithm: 0x%x\n", 3212 meshconf->conf_syncid); 3213 return 1; 3214 } 3215 if (meshconf->conf_authid != 0) { 3216 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3217 "unknown auth auth algorithm: 0x%x\n", 3218 meshconf->conf_pselid); 3219 return 1; 3220 } 3221 /* Not accepting peers */ 3222 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3223 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3224 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3225 return 1; 3226 } 3227 return 0; 3228 } 3229 3230 static int 3231 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3232 const uint8_t *ie) 3233 { 3234 const struct ieee80211_meshpeer_ie *meshpeer = 3235 (const struct ieee80211_meshpeer_ie *) ie; 3236 3237 if (meshpeer == NULL || 3238 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3239 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3240 return 1; 3241 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3242 IEEE80211_DPRINTF(vap, 3243 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3244 "Only MPM protocol is supported (proto: 0x%02X)", 3245 meshpeer->peer_proto); 3246 return 1; 3247 } 3248 switch (subtype) { 3249 case IEEE80211_ACTION_MESHPEERING_OPEN: 3250 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3251 return 1; 3252 break; 3253 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3254 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3255 return 1; 3256 break; 3257 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3258 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3259 return 1; 3260 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3261 meshpeer->peer_linkid != 0) 3262 return 1; 3263 if (meshpeer->peer_rcode == 0) 3264 return 1; 3265 break; 3266 } 3267 return 0; 3268 } 3269 3270 /* 3271 * Add a Mesh ID IE to a frame. 3272 */ 3273 uint8_t * 3274 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3275 { 3276 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3277 3278 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3279 3280 *frm++ = IEEE80211_ELEMID_MESHID; 3281 *frm++ = ms->ms_idlen; 3282 memcpy(frm, ms->ms_id, ms->ms_idlen); 3283 return frm + ms->ms_idlen; 3284 } 3285 3286 /* 3287 * Add a Mesh Configuration IE to a frame. 3288 * For now just use HWMP routing, Airtime link metric, Null Congestion 3289 * Signaling, Null Sync Protocol and Null Authentication. 3290 */ 3291 uint8_t * 3292 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3293 { 3294 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3295 uint16_t caps; 3296 3297 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3298 3299 *frm++ = IEEE80211_ELEMID_MESHCONF; 3300 *frm++ = IEEE80211_MESH_CONF_SZ; 3301 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3302 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3303 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3304 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3305 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3306 /* NB: set the number of neighbors before the rest */ 3307 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3308 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3309 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3310 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3311 frm += 1; 3312 caps = 0; 3313 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3314 caps |= IEEE80211_MESHCONF_CAP_AP; 3315 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3316 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3317 *frm++ = caps; 3318 return frm; 3319 } 3320 3321 /* 3322 * Add a Mesh Peer Management IE to a frame. 3323 */ 3324 uint8_t * 3325 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3326 uint16_t peerid, uint16_t reason) 3327 { 3328 3329 KASSERT(localid != 0, ("localid == 0")); 3330 3331 *frm++ = IEEE80211_ELEMID_MESHPEER; 3332 switch (subtype) { 3333 case IEEE80211_ACTION_MESHPEERING_OPEN: 3334 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3335 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3336 ADDSHORT(frm, localid); /* local ID */ 3337 break; 3338 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3339 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3340 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3341 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3342 ADDSHORT(frm, localid); /* local ID */ 3343 ADDSHORT(frm, peerid); /* peer ID */ 3344 break; 3345 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3346 if (peerid) 3347 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3348 else 3349 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3350 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3351 ADDSHORT(frm, localid); /* local ID */ 3352 if (peerid) 3353 ADDSHORT(frm, peerid); /* peer ID */ 3354 ADDSHORT(frm, reason); 3355 break; 3356 } 3357 return frm; 3358 } 3359 3360 /* 3361 * Compute an Airtime Link Metric for the link with this node. 3362 * 3363 * Based on Draft 3.0 spec (11B.10, p.149). 3364 */ 3365 /* 3366 * Max 802.11s overhead. 3367 */ 3368 #define IEEE80211_MESH_MAXOVERHEAD \ 3369 (sizeof(struct ieee80211_qosframe_addr4) \ 3370 + sizeof(struct ieee80211_meshcntl_ae10) \ 3371 + sizeof(struct llc) \ 3372 + IEEE80211_ADDR_LEN \ 3373 + IEEE80211_WEP_IVLEN \ 3374 + IEEE80211_WEP_KIDLEN \ 3375 + IEEE80211_WEP_CRCLEN \ 3376 + IEEE80211_WEP_MICLEN \ 3377 + IEEE80211_CRC_LEN) 3378 uint32_t 3379 mesh_airtime_calc(struct ieee80211_node *ni) 3380 { 3381 #define M_BITS 8 3382 #define S_FACTOR (2 * M_BITS) 3383 struct ieee80211com *ic = ni->ni_ic; 3384 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3385 const static int nbits = 8192 << M_BITS; 3386 uint32_t overhead, rate, errrate; 3387 uint64_t res; 3388 3389 /* Time to transmit a frame */ 3390 rate = ni->ni_txrate; 3391 overhead = ieee80211_compute_duration(ic->ic_rt, 3392 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3393 /* Error rate in percentage */ 3394 /* XXX assuming small failures are ok */ 3395 errrate = (((ifp->if_oerrors + 3396 ifp->if_ierrors) / 100) << M_BITS) / 100; 3397 res = (overhead + (nbits / rate)) * 3398 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3399 3400 return (uint32_t)(res >> S_FACTOR); 3401 #undef M_BITS 3402 #undef S_FACTOR 3403 } 3404 3405 /* 3406 * Add a Mesh Link Metric report IE to a frame. 3407 */ 3408 uint8_t * 3409 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3410 { 3411 *frm++ = IEEE80211_ELEMID_MESHLINK; 3412 *frm++ = 5; 3413 *frm++ = flags; 3414 ADDWORD(frm, metric); 3415 return frm; 3416 } 3417 3418 /* 3419 * Add a Mesh Gate Announcement IE to a frame. 3420 */ 3421 uint8_t * 3422 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3423 { 3424 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3425 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3426 *frm++ = ie->gann_flags; 3427 *frm++ = ie->gann_hopcount; 3428 *frm++ = ie->gann_ttl; 3429 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3430 frm += 6; 3431 ADDWORD(frm, ie->gann_seq); 3432 ADDSHORT(frm, ie->gann_interval); 3433 return frm; 3434 } 3435 #undef ADDSHORT 3436 #undef ADDWORD 3437 3438 /* 3439 * Initialize any mesh-specific node state. 3440 */ 3441 void 3442 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3443 { 3444 ni->ni_flags |= IEEE80211_NODE_QOS; 3445 callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE); 3446 callout_init(&ni->ni_mlhtimer, CALLOUT_MPSAFE); 3447 } 3448 3449 /* 3450 * Cleanup any mesh-specific node state. 3451 */ 3452 void 3453 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3454 { 3455 struct ieee80211vap *vap = ni->ni_vap; 3456 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3457 3458 callout_drain(&ni->ni_mltimer); 3459 callout_drain(&ni->ni_mlhtimer); 3460 /* NB: short-circuit callbacks after mesh_vdetach */ 3461 if (vap->iv_mesh != NULL) 3462 ms->ms_ppath->mpp_peerdown(ni); 3463 } 3464 3465 void 3466 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3467 { 3468 ni->ni_meshidlen = ie[1]; 3469 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3470 } 3471 3472 /* 3473 * Setup mesh-specific node state on neighbor discovery. 3474 */ 3475 void 3476 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3477 const struct ieee80211_frame *wh, 3478 const struct ieee80211_scanparams *sp) 3479 { 3480 ieee80211_parse_meshid(ni, sp->meshid); 3481 } 3482 3483 void 3484 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3485 struct ieee80211_beacon_offsets *bo) 3486 { 3487 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3488 3489 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3490 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3491 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3492 } 3493 } 3494 3495 static int 3496 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3497 { 3498 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3499 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3500 struct ieee80211_mesh_route *rt; 3501 struct ieee80211req_mesh_route *imr; 3502 size_t len, off; 3503 uint8_t *p; 3504 int error; 3505 3506 if (vap->iv_opmode != IEEE80211_M_MBSS) 3507 return ENOSYS; 3508 3509 error = 0; 3510 switch (ireq->i_type) { 3511 case IEEE80211_IOC_MESH_ID: 3512 ireq->i_len = ms->ms_idlen; 3513 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3514 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3515 break; 3516 case IEEE80211_IOC_MESH_AP: 3517 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3518 break; 3519 case IEEE80211_IOC_MESH_FWRD: 3520 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3521 break; 3522 case IEEE80211_IOC_MESH_GATE: 3523 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3524 break; 3525 case IEEE80211_IOC_MESH_TTL: 3526 ireq->i_val = ms->ms_ttl; 3527 break; 3528 case IEEE80211_IOC_MESH_RTCMD: 3529 switch (ireq->i_val) { 3530 case IEEE80211_MESH_RTCMD_LIST: 3531 len = 0; 3532 MESH_RT_LOCK(ms); 3533 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3534 len += sizeof(*imr); 3535 } 3536 MESH_RT_UNLOCK(ms); 3537 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3538 ireq->i_len = len; 3539 return ENOMEM; 3540 } 3541 ireq->i_len = len; 3542 /* XXX M_WAIT? */ 3543 p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO); 3544 if (p == NULL) 3545 return ENOMEM; 3546 off = 0; 3547 MESH_RT_LOCK(ms); 3548 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3549 if (off >= len) 3550 break; 3551 imr = (struct ieee80211req_mesh_route *) 3552 (p + off); 3553 IEEE80211_ADDR_COPY(imr->imr_dest, 3554 rt->rt_dest); 3555 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3556 rt->rt_nexthop); 3557 imr->imr_metric = rt->rt_metric; 3558 imr->imr_nhops = rt->rt_nhops; 3559 imr->imr_lifetime = 3560 ieee80211_mesh_rt_update(rt, 0); 3561 imr->imr_lastmseq = rt->rt_lastmseq; 3562 imr->imr_flags = rt->rt_flags; /* last */ 3563 off += sizeof(*imr); 3564 } 3565 MESH_RT_UNLOCK(ms); 3566 error = copyout(p, (uint8_t *)ireq->i_data, 3567 ireq->i_len); 3568 free(p, M_TEMP); 3569 break; 3570 case IEEE80211_MESH_RTCMD_FLUSH: 3571 case IEEE80211_MESH_RTCMD_ADD: 3572 case IEEE80211_MESH_RTCMD_DELETE: 3573 return EINVAL; 3574 default: 3575 return ENOSYS; 3576 } 3577 break; 3578 case IEEE80211_IOC_MESH_PR_METRIC: 3579 len = strlen(ms->ms_pmetric->mpm_descr); 3580 if (ireq->i_len < len) 3581 return EINVAL; 3582 ireq->i_len = len; 3583 error = copyout(ms->ms_pmetric->mpm_descr, 3584 (uint8_t *)ireq->i_data, len); 3585 break; 3586 case IEEE80211_IOC_MESH_PR_PATH: 3587 len = strlen(ms->ms_ppath->mpp_descr); 3588 if (ireq->i_len < len) 3589 return EINVAL; 3590 ireq->i_len = len; 3591 error = copyout(ms->ms_ppath->mpp_descr, 3592 (uint8_t *)ireq->i_data, len); 3593 break; 3594 default: 3595 return ENOSYS; 3596 } 3597 3598 return error; 3599 } 3600 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3601 3602 static int 3603 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3604 { 3605 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3606 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3607 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3608 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3609 int error; 3610 3611 if (vap->iv_opmode != IEEE80211_M_MBSS) 3612 return ENOSYS; 3613 3614 error = 0; 3615 switch (ireq->i_type) { 3616 case IEEE80211_IOC_MESH_ID: 3617 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3618 return EINVAL; 3619 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3620 if (error != 0) 3621 break; 3622 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3623 ms->ms_idlen = ireq->i_len; 3624 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3625 error = ENETRESET; 3626 break; 3627 case IEEE80211_IOC_MESH_AP: 3628 if (ireq->i_val) 3629 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3630 else 3631 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3632 error = ENETRESET; 3633 break; 3634 case IEEE80211_IOC_MESH_FWRD: 3635 if (ireq->i_val) 3636 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3637 else 3638 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3639 mesh_gatemode_setup(vap); 3640 break; 3641 case IEEE80211_IOC_MESH_GATE: 3642 if (ireq->i_val) 3643 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3644 else 3645 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3646 break; 3647 case IEEE80211_IOC_MESH_TTL: 3648 ms->ms_ttl = (uint8_t) ireq->i_val; 3649 break; 3650 case IEEE80211_IOC_MESH_RTCMD: 3651 switch (ireq->i_val) { 3652 case IEEE80211_MESH_RTCMD_LIST: 3653 return EINVAL; 3654 case IEEE80211_MESH_RTCMD_FLUSH: 3655 ieee80211_mesh_rt_flush(vap); 3656 break; 3657 case IEEE80211_MESH_RTCMD_ADD: 3658 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3659 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3660 return EINVAL; 3661 error = copyin(ireq->i_data, &tmpaddr, 3662 IEEE80211_ADDR_LEN); 3663 if (error == 0) 3664 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3665 break; 3666 case IEEE80211_MESH_RTCMD_DELETE: 3667 ieee80211_mesh_rt_del(vap, ireq->i_data); 3668 break; 3669 default: 3670 return ENOSYS; 3671 } 3672 break; 3673 case IEEE80211_IOC_MESH_PR_METRIC: 3674 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3675 if (error == 0) { 3676 error = mesh_select_proto_metric(vap, tmpproto); 3677 if (error == 0) 3678 error = ENETRESET; 3679 } 3680 break; 3681 case IEEE80211_IOC_MESH_PR_PATH: 3682 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3683 if (error == 0) { 3684 error = mesh_select_proto_path(vap, tmpproto); 3685 if (error == 0) 3686 error = ENETRESET; 3687 } 3688 break; 3689 default: 3690 return ENOSYS; 3691 } 3692 return error; 3693 } 3694 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3695