1 /*- 2 * Copyright (c) 2009 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Rui Paulo under sponsorship from the 6 * FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 #include <sys/cdefs.h> 30 #ifdef __FreeBSD__ 31 __FBSDID("$FreeBSD$"); 32 #endif 33 34 /* 35 * IEEE 802.11s Mesh Point (MBSS) support. 36 * 37 * Based on March 2009, D3.0 802.11s draft spec. 38 */ 39 #include "opt_inet.h" 40 #include "opt_wlan.h" 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/mbuf.h> 45 #include <sys/malloc.h> 46 #include <sys/kernel.h> 47 48 #include <sys/socket.h> 49 #include <sys/sockio.h> 50 #include <sys/endian.h> 51 #include <sys/errno.h> 52 #include <sys/proc.h> 53 #include <sys/sysctl.h> 54 55 #include <net/bpf.h> 56 #include <net/if.h> 57 #include <net/if_var.h> 58 #include <net/if_media.h> 59 #include <net/if_llc.h> 60 #include <net/ethernet.h> 61 62 #include <net80211/ieee80211_var.h> 63 #include <net80211/ieee80211_action.h> 64 #ifdef IEEE80211_SUPPORT_SUPERG 65 #include <net80211/ieee80211_superg.h> 66 #endif 67 #include <net80211/ieee80211_input.h> 68 #include <net80211/ieee80211_mesh.h> 69 70 static void mesh_rt_flush_invalid(struct ieee80211vap *); 71 static int mesh_select_proto_path(struct ieee80211vap *, const char *); 72 static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 73 static void mesh_vattach(struct ieee80211vap *); 74 static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 75 static void mesh_rt_cleanup_cb(void *); 76 static void mesh_gatemode_setup(struct ieee80211vap *); 77 static void mesh_gatemode_cb(void *); 78 static void mesh_linkchange(struct ieee80211_node *, 79 enum ieee80211_mesh_mlstate); 80 static void mesh_checkid(void *, struct ieee80211_node *); 81 static uint32_t mesh_generateid(struct ieee80211vap *); 82 static int mesh_checkpseq(struct ieee80211vap *, 83 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 84 static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, 85 struct ieee80211_mesh_route *); 86 static void mesh_forward(struct ieee80211vap *, struct mbuf *, 87 const struct ieee80211_meshcntl *); 88 static int mesh_input(struct ieee80211_node *, struct mbuf *, 89 const struct ieee80211_rx_stats *rxs, int, int); 90 static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 91 const struct ieee80211_rx_stats *rxs, int, int); 92 static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 93 static void mesh_peer_timeout_setup(struct ieee80211_node *); 94 static void mesh_peer_timeout_backoff(struct ieee80211_node *); 95 static void mesh_peer_timeout_cb(void *); 96 static __inline void 97 mesh_peer_timeout_stop(struct ieee80211_node *); 98 static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 99 static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 100 static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 101 const uint8_t *); 102 uint32_t mesh_airtime_calc(struct ieee80211_node *); 103 104 /* 105 * Timeout values come from the specification and are in milliseconds. 106 */ 107 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 108 "IEEE 802.11s parameters"); 109 static int ieee80211_mesh_gateint = -1; 110 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW, 111 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 112 "mesh gate interval (ms)"); 113 static int ieee80211_mesh_retrytimeout = -1; 114 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, 115 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 116 "Retry timeout (msec)"); 117 static int ieee80211_mesh_holdingtimeout = -1; 118 119 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, 120 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 121 "Holding state timeout (msec)"); 122 static int ieee80211_mesh_confirmtimeout = -1; 123 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, 124 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 125 "Confirm state timeout (msec)"); 126 static int ieee80211_mesh_backofftimeout = -1; 127 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW, 128 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 129 "Backoff timeout (msec). This is to throutles peering forever when " 130 "not receiving answer or is rejected by a neighbor"); 131 static int ieee80211_mesh_maxretries = 2; 132 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW, 133 &ieee80211_mesh_maxretries, 0, 134 "Maximum retries during peer link establishment"); 135 static int ieee80211_mesh_maxholding = 2; 136 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW, 137 &ieee80211_mesh_maxholding, 0, 138 "Maximum times we are allowed to transition to HOLDING state before " 139 "backinoff during peer link establishment"); 140 141 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 142 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 143 144 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 145 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 146 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 147 static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 148 static ieee80211_recv_action_func mesh_recv_action_meshgate; 149 150 static ieee80211_send_action_func mesh_send_action_meshpeering_open; 151 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 152 static ieee80211_send_action_func mesh_send_action_meshpeering_close; 153 static ieee80211_send_action_func mesh_send_action_meshlmetric; 154 static ieee80211_send_action_func mesh_send_action_meshgate; 155 156 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 157 .mpm_descr = "AIRTIME", 158 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 159 .mpm_metric = mesh_airtime_calc, 160 }; 161 162 static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 163 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 164 165 #define RT_ENTRY_LOCK(rt) mtx_lock(&(rt)->rt_lock) 166 #define RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED) 167 #define RT_ENTRY_UNLOCK(rt) mtx_unlock(&(rt)->rt_lock) 168 169 #define MESH_RT_LOCK(ms) mtx_lock(&(ms)->ms_rt_lock) 170 #define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED) 171 #define MESH_RT_UNLOCK(ms) mtx_unlock(&(ms)->ms_rt_lock) 172 173 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 174 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 175 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 176 177 /* The longer one of the lifetime should be stored as new lifetime */ 178 #define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 179 180 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 181 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 182 183 /* 184 * Helper functions to manipulate the Mesh routing table. 185 */ 186 187 static struct ieee80211_mesh_route * 188 mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 189 const uint8_t dest[IEEE80211_ADDR_LEN]) 190 { 191 struct ieee80211_mesh_route *rt; 192 193 MESH_RT_LOCK_ASSERT(ms); 194 195 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 196 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 197 return rt; 198 } 199 return NULL; 200 } 201 202 static struct ieee80211_mesh_route * 203 mesh_rt_add_locked(struct ieee80211vap *vap, 204 const uint8_t dest[IEEE80211_ADDR_LEN]) 205 { 206 struct ieee80211_mesh_state *ms = vap->iv_mesh; 207 struct ieee80211_mesh_route *rt; 208 209 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 210 ("%s: adding broadcast to the routing table", __func__)); 211 212 MESH_RT_LOCK_ASSERT(ms); 213 214 rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) + 215 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, 216 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 217 if (rt != NULL) { 218 rt->rt_vap = vap; 219 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 220 rt->rt_priv = (void *)ALIGN(&rt[1]); 221 mtx_init(&rt->rt_lock, "MBSS_RT", "802.11s route entry", MTX_DEF); 222 callout_init(&rt->rt_discovery, 1); 223 rt->rt_updtime = ticks; /* create time */ 224 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 225 } 226 return rt; 227 } 228 229 struct ieee80211_mesh_route * 230 ieee80211_mesh_rt_find(struct ieee80211vap *vap, 231 const uint8_t dest[IEEE80211_ADDR_LEN]) 232 { 233 struct ieee80211_mesh_state *ms = vap->iv_mesh; 234 struct ieee80211_mesh_route *rt; 235 236 MESH_RT_LOCK(ms); 237 rt = mesh_rt_find_locked(ms, dest); 238 MESH_RT_UNLOCK(ms); 239 return rt; 240 } 241 242 struct ieee80211_mesh_route * 243 ieee80211_mesh_rt_add(struct ieee80211vap *vap, 244 const uint8_t dest[IEEE80211_ADDR_LEN]) 245 { 246 struct ieee80211_mesh_state *ms = vap->iv_mesh; 247 struct ieee80211_mesh_route *rt; 248 249 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 250 ("%s: duplicate entry in the routing table", __func__)); 251 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 252 ("%s: adding self to the routing table", __func__)); 253 254 MESH_RT_LOCK(ms); 255 rt = mesh_rt_add_locked(vap, dest); 256 MESH_RT_UNLOCK(ms); 257 return rt; 258 } 259 260 /* 261 * Update the route lifetime and returns the updated lifetime. 262 * If new_lifetime is zero and route is timedout it will be invalidated. 263 * new_lifetime is in msec 264 */ 265 int 266 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 267 { 268 int timesince, now; 269 uint32_t lifetime = 0; 270 271 KASSERT(rt != NULL, ("route is NULL")); 272 273 now = ticks; 274 RT_ENTRY_LOCK(rt); 275 276 /* dont clobber a proxy entry gated by us */ 277 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 278 RT_ENTRY_UNLOCK(rt); 279 return rt->rt_lifetime; 280 } 281 282 timesince = ticks_to_msecs(now - rt->rt_updtime); 283 rt->rt_updtime = now; 284 if (timesince >= rt->rt_lifetime) { 285 if (new_lifetime != 0) { 286 rt->rt_lifetime = new_lifetime; 287 } 288 else { 289 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 290 rt->rt_lifetime = 0; 291 } 292 } else { 293 /* update what is left of lifetime */ 294 rt->rt_lifetime = rt->rt_lifetime - timesince; 295 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 296 new_lifetime, rt->rt_lifetime); 297 } 298 lifetime = rt->rt_lifetime; 299 RT_ENTRY_UNLOCK(rt); 300 301 return lifetime; 302 } 303 304 /* 305 * Add a proxy route (as needed) for the specified destination. 306 */ 307 void 308 ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 309 const uint8_t dest[IEEE80211_ADDR_LEN]) 310 { 311 struct ieee80211_mesh_state *ms = vap->iv_mesh; 312 struct ieee80211_mesh_route *rt; 313 314 MESH_RT_LOCK(ms); 315 rt = mesh_rt_find_locked(ms, dest); 316 if (rt == NULL) { 317 rt = mesh_rt_add_locked(vap, dest); 318 if (rt == NULL) { 319 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 320 "%s", "unable to add proxy entry"); 321 vap->iv_stats.is_mesh_rtaddfailed++; 322 } else { 323 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 324 "%s", "add proxy entry"); 325 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 326 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 327 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 328 | IEEE80211_MESHRT_FLAGS_PROXY; 329 } 330 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 331 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 332 ("no proxy flag for poxy entry")); 333 struct ieee80211com *ic = vap->iv_ic; 334 /* 335 * Fix existing entry created by received frames from 336 * stations that have some memory of dest. We also 337 * flush any frames held on the staging queue; delivering 338 * them is too much trouble right now. 339 */ 340 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 341 "%s", "fix proxy entry"); 342 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 343 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 344 | IEEE80211_MESHRT_FLAGS_PROXY; 345 /* XXX belongs in hwmp */ 346 ieee80211_ageq_drain_node(&ic->ic_stageq, 347 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 348 /* XXX stat? */ 349 } 350 MESH_RT_UNLOCK(ms); 351 } 352 353 static __inline void 354 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 355 { 356 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 357 /* 358 * Grab the lock before destroying it, to be sure no one else 359 * is holding the route. 360 */ 361 RT_ENTRY_LOCK(rt); 362 callout_drain(&rt->rt_discovery); 363 mtx_destroy(&rt->rt_lock); 364 IEEE80211_FREE(rt, M_80211_MESH_RT); 365 } 366 367 void 368 ieee80211_mesh_rt_del(struct ieee80211vap *vap, 369 const uint8_t dest[IEEE80211_ADDR_LEN]) 370 { 371 struct ieee80211_mesh_state *ms = vap->iv_mesh; 372 struct ieee80211_mesh_route *rt, *next; 373 374 MESH_RT_LOCK(ms); 375 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 376 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 377 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 378 ms->ms_ppath->mpp_senderror(vap, dest, rt, 379 IEEE80211_REASON_MESH_PERR_NO_PROXY); 380 } else { 381 ms->ms_ppath->mpp_senderror(vap, dest, rt, 382 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 383 } 384 mesh_rt_del(ms, rt); 385 MESH_RT_UNLOCK(ms); 386 return; 387 } 388 } 389 MESH_RT_UNLOCK(ms); 390 } 391 392 void 393 ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 394 { 395 struct ieee80211_mesh_state *ms = vap->iv_mesh; 396 struct ieee80211_mesh_route *rt, *next; 397 398 if (ms == NULL) 399 return; 400 MESH_RT_LOCK(ms); 401 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 402 mesh_rt_del(ms, rt); 403 MESH_RT_UNLOCK(ms); 404 } 405 406 void 407 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 408 const uint8_t peer[IEEE80211_ADDR_LEN]) 409 { 410 struct ieee80211_mesh_state *ms = vap->iv_mesh; 411 struct ieee80211_mesh_route *rt, *next; 412 413 MESH_RT_LOCK(ms); 414 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 415 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 416 mesh_rt_del(ms, rt); 417 } 418 MESH_RT_UNLOCK(ms); 419 } 420 421 /* 422 * Flush expired routing entries, i.e. those in invalid state for 423 * some time. 424 */ 425 static void 426 mesh_rt_flush_invalid(struct ieee80211vap *vap) 427 { 428 struct ieee80211_mesh_state *ms = vap->iv_mesh; 429 struct ieee80211_mesh_route *rt, *next; 430 431 if (ms == NULL) 432 return; 433 MESH_RT_LOCK(ms); 434 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 435 /* Discover paths will be deleted by their own callout */ 436 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 437 continue; 438 ieee80211_mesh_rt_update(rt, 0); 439 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 440 mesh_rt_del(ms, rt); 441 } 442 MESH_RT_UNLOCK(ms); 443 } 444 445 #define N(a) (sizeof(a) / sizeof(a[0])) 446 int 447 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 448 { 449 int i, firstempty = -1; 450 451 for (i = 0; i < N(mesh_proto_paths); i++) { 452 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 453 IEEE80211_MESH_PROTO_DSZ) == 0) 454 return EEXIST; 455 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 456 firstempty = i; 457 } 458 if (firstempty < 0) 459 return ENOSPC; 460 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 461 mesh_proto_paths[firstempty].mpp_active = 1; 462 return 0; 463 } 464 465 int 466 ieee80211_mesh_register_proto_metric(const struct 467 ieee80211_mesh_proto_metric *mpm) 468 { 469 int i, firstempty = -1; 470 471 for (i = 0; i < N(mesh_proto_metrics); i++) { 472 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 473 IEEE80211_MESH_PROTO_DSZ) == 0) 474 return EEXIST; 475 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 476 firstempty = i; 477 } 478 if (firstempty < 0) 479 return ENOSPC; 480 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 481 mesh_proto_metrics[firstempty].mpm_active = 1; 482 return 0; 483 } 484 485 static int 486 mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 487 { 488 struct ieee80211_mesh_state *ms = vap->iv_mesh; 489 int i; 490 491 for (i = 0; i < N(mesh_proto_paths); i++) { 492 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 493 ms->ms_ppath = &mesh_proto_paths[i]; 494 return 0; 495 } 496 } 497 return ENOENT; 498 } 499 500 static int 501 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 502 { 503 struct ieee80211_mesh_state *ms = vap->iv_mesh; 504 int i; 505 506 for (i = 0; i < N(mesh_proto_metrics); i++) { 507 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 508 ms->ms_pmetric = &mesh_proto_metrics[i]; 509 return 0; 510 } 511 } 512 return ENOENT; 513 } 514 #undef N 515 516 static void 517 mesh_gatemode_setup(struct ieee80211vap *vap) 518 { 519 struct ieee80211_mesh_state *ms = vap->iv_mesh; 520 521 /* 522 * NB: When a mesh gate is running as a ROOT it shall 523 * not send out periodic GANNs but instead mark the 524 * mesh gate flag for the corresponding proactive PREQ 525 * and RANN frames. 526 */ 527 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 528 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 529 callout_drain(&ms->ms_gatetimer); 530 return ; 531 } 532 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 533 mesh_gatemode_cb, vap); 534 } 535 536 static void 537 mesh_gatemode_cb(void *arg) 538 { 539 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 540 struct ieee80211_mesh_state *ms = vap->iv_mesh; 541 struct ieee80211_meshgann_ie gann; 542 543 gann.gann_flags = 0; /* Reserved */ 544 gann.gann_hopcount = 0; 545 gann.gann_ttl = ms->ms_ttl; 546 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 547 gann.gann_seq = ms->ms_gateseq++; 548 gann.gann_interval = ieee80211_mesh_gateint; 549 550 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 551 "send broadcast GANN (seq %u)", gann.gann_seq); 552 553 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 554 IEEE80211_ACTION_MESH_GANN, &gann); 555 mesh_gatemode_setup(vap); 556 } 557 558 static void 559 ieee80211_mesh_init(void) 560 { 561 562 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 563 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 564 565 /* 566 * Setup mesh parameters that depends on the clock frequency. 567 */ 568 ieee80211_mesh_gateint = msecs_to_ticks(10000); 569 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 570 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 571 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 572 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 573 574 /* 575 * Register action frame handlers. 576 */ 577 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 578 IEEE80211_ACTION_MESHPEERING_OPEN, 579 mesh_recv_action_meshpeering_open); 580 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 581 IEEE80211_ACTION_MESHPEERING_CONFIRM, 582 mesh_recv_action_meshpeering_confirm); 583 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 584 IEEE80211_ACTION_MESHPEERING_CLOSE, 585 mesh_recv_action_meshpeering_close); 586 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 587 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 588 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 589 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 590 591 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 592 IEEE80211_ACTION_MESHPEERING_OPEN, 593 mesh_send_action_meshpeering_open); 594 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 595 IEEE80211_ACTION_MESHPEERING_CONFIRM, 596 mesh_send_action_meshpeering_confirm); 597 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 598 IEEE80211_ACTION_MESHPEERING_CLOSE, 599 mesh_send_action_meshpeering_close); 600 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 601 IEEE80211_ACTION_MESH_LMETRIC, 602 mesh_send_action_meshlmetric); 603 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 604 IEEE80211_ACTION_MESH_GANN, 605 mesh_send_action_meshgate); 606 607 /* 608 * Register Airtime Link Metric. 609 */ 610 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 611 612 } 613 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 614 615 void 616 ieee80211_mesh_attach(struct ieee80211com *ic) 617 { 618 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 619 } 620 621 void 622 ieee80211_mesh_detach(struct ieee80211com *ic) 623 { 624 } 625 626 static void 627 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 628 { 629 struct ieee80211com *ic = ni->ni_ic; 630 uint16_t args[3]; 631 632 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 633 args[0] = ni->ni_mlpid; 634 args[1] = ni->ni_mllid; 635 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 636 ieee80211_send_action(ni, 637 IEEE80211_ACTION_CAT_SELF_PROT, 638 IEEE80211_ACTION_MESHPEERING_CLOSE, 639 args); 640 } 641 callout_drain(&ni->ni_mltimer); 642 /* XXX belongs in hwmp */ 643 ieee80211_ageq_drain_node(&ic->ic_stageq, 644 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 645 } 646 647 static void 648 mesh_vdetach(struct ieee80211vap *vap) 649 { 650 struct ieee80211_mesh_state *ms = vap->iv_mesh; 651 652 callout_drain(&ms->ms_cleantimer); 653 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 654 NULL); 655 ieee80211_mesh_rt_flush(vap); 656 mtx_destroy(&ms->ms_rt_lock); 657 ms->ms_ppath->mpp_vdetach(vap); 658 IEEE80211_FREE(vap->iv_mesh, M_80211_VAP); 659 vap->iv_mesh = NULL; 660 } 661 662 static void 663 mesh_vattach(struct ieee80211vap *vap) 664 { 665 struct ieee80211_mesh_state *ms; 666 vap->iv_newstate = mesh_newstate; 667 vap->iv_input = mesh_input; 668 vap->iv_opdetach = mesh_vdetach; 669 vap->iv_recv_mgmt = mesh_recv_mgmt; 670 vap->iv_recv_ctl = mesh_recv_ctl; 671 ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 672 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 673 if (ms == NULL) { 674 printf("%s: couldn't alloc MBSS state\n", __func__); 675 return; 676 } 677 vap->iv_mesh = ms; 678 ms->ms_seq = 0; 679 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 680 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 681 TAILQ_INIT(&ms->ms_known_gates); 682 TAILQ_INIT(&ms->ms_routes); 683 mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF); 684 callout_init(&ms->ms_cleantimer, 1); 685 callout_init(&ms->ms_gatetimer, 1); 686 ms->ms_gateseq = 0; 687 mesh_select_proto_metric(vap, "AIRTIME"); 688 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 689 mesh_select_proto_path(vap, "HWMP"); 690 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 691 ms->ms_ppath->mpp_vattach(vap); 692 } 693 694 /* 695 * IEEE80211_M_MBSS vap state machine handler. 696 */ 697 static int 698 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 699 { 700 struct ieee80211_mesh_state *ms = vap->iv_mesh; 701 struct ieee80211com *ic = vap->iv_ic; 702 struct ieee80211_node *ni; 703 enum ieee80211_state ostate; 704 705 IEEE80211_LOCK_ASSERT(ic); 706 707 ostate = vap->iv_state; 708 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 709 __func__, ieee80211_state_name[ostate], 710 ieee80211_state_name[nstate], arg); 711 vap->iv_state = nstate; /* state transition */ 712 if (ostate != IEEE80211_S_SCAN) 713 ieee80211_cancel_scan(vap); /* background scan */ 714 ni = vap->iv_bss; /* NB: no reference held */ 715 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 716 callout_drain(&ms->ms_cleantimer); 717 callout_drain(&ms->ms_gatetimer); 718 } 719 switch (nstate) { 720 case IEEE80211_S_INIT: 721 switch (ostate) { 722 case IEEE80211_S_SCAN: 723 ieee80211_cancel_scan(vap); 724 break; 725 case IEEE80211_S_CAC: 726 ieee80211_dfs_cac_stop(vap); 727 break; 728 case IEEE80211_S_RUN: 729 ieee80211_iterate_nodes(&ic->ic_sta, 730 mesh_vdetach_peers, NULL); 731 break; 732 default: 733 break; 734 } 735 if (ostate != IEEE80211_S_INIT) { 736 /* NB: optimize INIT -> INIT case */ 737 ieee80211_reset_bss(vap); 738 ieee80211_mesh_rt_flush(vap); 739 } 740 break; 741 case IEEE80211_S_SCAN: 742 switch (ostate) { 743 case IEEE80211_S_INIT: 744 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 745 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 746 ms->ms_idlen != 0) { 747 /* 748 * Already have a channel and a mesh ID; bypass 749 * the scan and startup immediately. 750 */ 751 ieee80211_create_ibss(vap, vap->iv_des_chan); 752 break; 753 } 754 /* 755 * Initiate a scan. We can come here as a result 756 * of an IEEE80211_IOC_SCAN_REQ too in which case 757 * the vap will be marked with IEEE80211_FEXT_SCANREQ 758 * and the scan request parameters will be present 759 * in iv_scanreq. Otherwise we do the default. 760 */ 761 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 762 ieee80211_check_scan(vap, 763 vap->iv_scanreq_flags, 764 vap->iv_scanreq_duration, 765 vap->iv_scanreq_mindwell, 766 vap->iv_scanreq_maxdwell, 767 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 768 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 769 } else 770 ieee80211_check_scan_current(vap); 771 break; 772 default: 773 break; 774 } 775 break; 776 case IEEE80211_S_CAC: 777 /* 778 * Start CAC on a DFS channel. We come here when starting 779 * a bss on a DFS channel (see ieee80211_create_ibss). 780 */ 781 ieee80211_dfs_cac_start(vap); 782 break; 783 case IEEE80211_S_RUN: 784 switch (ostate) { 785 case IEEE80211_S_INIT: 786 /* 787 * Already have a channel; bypass the 788 * scan and startup immediately. 789 * Note that ieee80211_create_ibss will call 790 * back to do a RUN->RUN state change. 791 */ 792 ieee80211_create_ibss(vap, 793 ieee80211_ht_adjust_channel(ic, 794 ic->ic_curchan, vap->iv_flags_ht)); 795 /* NB: iv_bss is changed on return */ 796 break; 797 case IEEE80211_S_CAC: 798 /* 799 * NB: This is the normal state change when CAC 800 * expires and no radar was detected; no need to 801 * clear the CAC timer as it's already expired. 802 */ 803 /* fall thru... */ 804 case IEEE80211_S_CSA: 805 #if 0 806 /* 807 * Shorten inactivity timer of associated stations 808 * to weed out sta's that don't follow a CSA. 809 */ 810 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 811 #endif 812 /* 813 * Update bss node channel to reflect where 814 * we landed after CSA. 815 */ 816 ieee80211_node_set_chan(vap->iv_bss, 817 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 818 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 819 /* XXX bypass debug msgs */ 820 break; 821 case IEEE80211_S_SCAN: 822 case IEEE80211_S_RUN: 823 #ifdef IEEE80211_DEBUG 824 if (ieee80211_msg_debug(vap)) { 825 struct ieee80211_node *ni = vap->iv_bss; 826 ieee80211_note(vap, 827 "synchronized with %s meshid ", 828 ether_sprintf(ni->ni_meshid)); 829 ieee80211_print_essid(ni->ni_meshid, 830 ni->ni_meshidlen); 831 /* XXX MCS/HT */ 832 printf(" channel %d\n", 833 ieee80211_chan2ieee(ic, ic->ic_curchan)); 834 } 835 #endif 836 break; 837 default: 838 break; 839 } 840 ieee80211_node_authorize(vap->iv_bss); 841 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 842 mesh_rt_cleanup_cb, vap); 843 mesh_gatemode_setup(vap); 844 break; 845 default: 846 break; 847 } 848 /* NB: ostate not nstate */ 849 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 850 return 0; 851 } 852 853 static void 854 mesh_rt_cleanup_cb(void *arg) 855 { 856 struct ieee80211vap *vap = arg; 857 struct ieee80211_mesh_state *ms = vap->iv_mesh; 858 859 mesh_rt_flush_invalid(vap); 860 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 861 mesh_rt_cleanup_cb, vap); 862 } 863 864 /* 865 * Mark a mesh STA as gate and return a pointer to it. 866 * If this is first time, we create a new gate route. 867 * Always update the path route to this mesh gate. 868 */ 869 struct ieee80211_mesh_gate_route * 870 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 871 struct ieee80211_mesh_route *rt) 872 { 873 struct ieee80211_mesh_state *ms = vap->iv_mesh; 874 struct ieee80211_mesh_gate_route *gr = NULL, *next; 875 int found = 0; 876 877 MESH_RT_LOCK(ms); 878 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 879 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 880 found = 1; 881 break; 882 } 883 } 884 885 if (!found) { 886 /* New mesh gate add it to known table. */ 887 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 888 "%s", "stored new gate information from pro-PREQ."); 889 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 890 M_80211_MESH_GT_RT, 891 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 892 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 893 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 894 } 895 gr->gr_route = rt; 896 /* TODO: link from path route to gate route */ 897 MESH_RT_UNLOCK(ms); 898 899 return gr; 900 } 901 902 903 /* 904 * Helper function to note the Mesh Peer Link FSM change. 905 */ 906 static void 907 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 908 { 909 struct ieee80211vap *vap = ni->ni_vap; 910 struct ieee80211_mesh_state *ms = vap->iv_mesh; 911 #ifdef IEEE80211_DEBUG 912 static const char *meshlinkstates[] = { 913 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 914 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 915 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 916 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 917 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 918 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 919 }; 920 #endif 921 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 922 ni, "peer link: %s -> %s", 923 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 924 925 /* track neighbor count */ 926 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 927 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 928 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 929 ms->ms_neighbors++; 930 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 931 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 932 state != IEEE80211_NODE_MESH_ESTABLISHED) { 933 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 934 ms->ms_neighbors--; 935 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 936 } 937 ni->ni_mlstate = state; 938 switch (state) { 939 case IEEE80211_NODE_MESH_HOLDING: 940 ms->ms_ppath->mpp_peerdown(ni); 941 break; 942 case IEEE80211_NODE_MESH_ESTABLISHED: 943 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 944 break; 945 default: 946 break; 947 } 948 } 949 950 /* 951 * Helper function to generate a unique local ID required for mesh 952 * peer establishment. 953 */ 954 static void 955 mesh_checkid(void *arg, struct ieee80211_node *ni) 956 { 957 uint16_t *r = arg; 958 959 if (*r == ni->ni_mllid) 960 *(uint16_t *)arg = 0; 961 } 962 963 static uint32_t 964 mesh_generateid(struct ieee80211vap *vap) 965 { 966 int maxiter = 4; 967 uint16_t r; 968 969 do { 970 get_random_bytes(&r, 2); 971 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 972 maxiter--; 973 } while (r == 0 && maxiter > 0); 974 return r; 975 } 976 977 /* 978 * Verifies if we already received this packet by checking its 979 * sequence number. 980 * Returns 0 if the frame is to be accepted, 1 otherwise. 981 */ 982 static int 983 mesh_checkpseq(struct ieee80211vap *vap, 984 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 985 { 986 struct ieee80211_mesh_route *rt; 987 988 rt = ieee80211_mesh_rt_find(vap, source); 989 if (rt == NULL) { 990 rt = ieee80211_mesh_rt_add(vap, source); 991 if (rt == NULL) { 992 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 993 "%s", "add mcast route failed"); 994 vap->iv_stats.is_mesh_rtaddfailed++; 995 return 1; 996 } 997 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 998 "add mcast route, mesh seqno %d", seq); 999 rt->rt_lastmseq = seq; 1000 return 0; 1001 } 1002 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 1003 return 1; 1004 } else { 1005 rt->rt_lastmseq = seq; 1006 return 0; 1007 } 1008 } 1009 1010 /* 1011 * Iterate the routing table and locate the next hop. 1012 */ 1013 struct ieee80211_node * 1014 ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1015 const uint8_t dest[IEEE80211_ADDR_LEN]) 1016 { 1017 struct ieee80211_mesh_route *rt; 1018 1019 rt = ieee80211_mesh_rt_find(vap, dest); 1020 if (rt == NULL) 1021 return NULL; 1022 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1023 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1024 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1025 /* XXX stat */ 1026 return NULL; 1027 } 1028 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1029 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1030 if (rt == NULL) return NULL; 1031 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1032 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1033 "%s: meshgate !valid, flags 0x%x", __func__, 1034 rt->rt_flags); 1035 /* XXX stat */ 1036 return NULL; 1037 } 1038 } 1039 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1040 } 1041 1042 static void 1043 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1044 struct ieee80211_mesh_route *rt_gate) 1045 { 1046 struct ifnet *ifp = vap->iv_ifp; 1047 struct ieee80211_node *ni; 1048 1049 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1050 1051 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1052 if (ni == NULL) { 1053 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1054 m_freem(m); 1055 return; 1056 } 1057 1058 /* 1059 * Send through the VAP packet transmit path. 1060 * This consumes the node ref grabbed above and 1061 * the mbuf, regardless of whether there's a problem 1062 * or not. 1063 */ 1064 (void) ieee80211_vap_pkt_send_dest(vap, m, ni); 1065 } 1066 1067 /* 1068 * Forward the queued frames to known valid mesh gates. 1069 * Assume destination to be outside the MBSS (i.e. proxy entry), 1070 * If no valid mesh gates are known silently discard queued frames. 1071 * After transmitting frames to all known valid mesh gates, this route 1072 * will be marked invalid, and a new path discovery will happen in the hopes 1073 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1074 */ 1075 void 1076 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1077 struct ieee80211_mesh_route *rt_dest) 1078 { 1079 struct ieee80211com *ic = vap->iv_ic; 1080 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1081 struct ieee80211_mesh_route *rt_gate; 1082 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1083 struct mbuf *m, *mcopy, *next; 1084 1085 IEEE80211_TX_UNLOCK_ASSERT(ic); 1086 1087 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1088 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1089 1090 /* XXX: send to more than one valid mash gate */ 1091 MESH_RT_LOCK(ms); 1092 1093 m = ieee80211_ageq_remove(&ic->ic_stageq, 1094 (struct ieee80211_node *)(uintptr_t) 1095 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1096 1097 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1098 rt_gate = gr->gr_route; 1099 if (rt_gate == NULL) { 1100 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1101 rt_dest->rt_dest, 1102 "mesh gate with no path %6D", 1103 gr->gr_addr, ":"); 1104 continue; 1105 } 1106 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1107 continue; 1108 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1109 ("route not marked as a mesh gate")); 1110 KASSERT((rt_gate->rt_flags & 1111 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1112 ("found mesh gate that is also marked porxy")); 1113 /* 1114 * convert route to a proxy route gated by the current 1115 * mesh gate, this is needed so encap can built data 1116 * frame with correct address. 1117 */ 1118 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1119 IEEE80211_MESHRT_FLAGS_VALID; 1120 rt_dest->rt_ext_seq = 1; /* random value */ 1121 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1122 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1123 rt_dest->rt_metric = rt_gate->rt_metric; 1124 rt_dest->rt_nhops = rt_gate->rt_nhops; 1125 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1126 MESH_RT_UNLOCK(ms); 1127 /* XXX: lock?? */ 1128 mcopy = m_dup(m, M_NOWAIT); 1129 for (; mcopy != NULL; mcopy = next) { 1130 next = mcopy->m_nextpkt; 1131 mcopy->m_nextpkt = NULL; 1132 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1133 rt_dest->rt_dest, 1134 "flush queued frame %p len %d", mcopy, 1135 mcopy->m_pkthdr.len); 1136 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1137 } 1138 MESH_RT_LOCK(ms); 1139 } 1140 rt_dest->rt_flags = 0; /* Mark invalid */ 1141 m_freem(m); 1142 MESH_RT_UNLOCK(ms); 1143 } 1144 1145 /* 1146 * Forward the specified frame. 1147 * Decrement the TTL and set TA to our MAC address. 1148 */ 1149 static void 1150 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1151 const struct ieee80211_meshcntl *mc) 1152 { 1153 struct ieee80211com *ic = vap->iv_ic; 1154 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1155 struct ifnet *ifp = vap->iv_ifp; 1156 const struct ieee80211_frame *wh = 1157 mtod(m, const struct ieee80211_frame *); 1158 struct mbuf *mcopy; 1159 struct ieee80211_meshcntl *mccopy; 1160 struct ieee80211_frame *whcopy; 1161 struct ieee80211_node *ni; 1162 int err; 1163 1164 /* This is called from the RX path - don't hold this lock */ 1165 IEEE80211_TX_UNLOCK_ASSERT(ic); 1166 1167 /* 1168 * mesh ttl of 1 means we are the last one receving it, 1169 * according to amendment we decrement and then check if 1170 * 0, if so we dont forward. 1171 */ 1172 if (mc->mc_ttl < 1) { 1173 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1174 "%s", "frame not fwd'd, ttl 1"); 1175 vap->iv_stats.is_mesh_fwd_ttl++; 1176 return; 1177 } 1178 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1179 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1180 "%s", "frame not fwd'd, fwding disabled"); 1181 vap->iv_stats.is_mesh_fwd_disabled++; 1182 return; 1183 } 1184 mcopy = m_dup(m, M_NOWAIT); 1185 if (mcopy == NULL) { 1186 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1187 "%s", "frame not fwd'd, cannot dup"); 1188 vap->iv_stats.is_mesh_fwd_nobuf++; 1189 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1190 return; 1191 } 1192 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1193 sizeof(struct ieee80211_meshcntl)); 1194 if (mcopy == NULL) { 1195 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1196 "%s", "frame not fwd'd, too short"); 1197 vap->iv_stats.is_mesh_fwd_tooshort++; 1198 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1199 m_freem(mcopy); 1200 return; 1201 } 1202 whcopy = mtod(mcopy, struct ieee80211_frame *); 1203 mccopy = (struct ieee80211_meshcntl *) 1204 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1205 /* XXX clear other bits? */ 1206 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1207 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1208 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1209 ni = ieee80211_ref_node(vap->iv_bss); 1210 mcopy->m_flags |= M_MCAST; 1211 } else { 1212 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1213 if (ni == NULL) { 1214 /* 1215 * [Optional] any of the following three actions: 1216 * o silently discard 1217 * o trigger a path discovery 1218 * o inform TA that meshDA is unknown. 1219 */ 1220 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1221 "%s", "frame not fwd'd, no path"); 1222 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1223 IEEE80211_REASON_MESH_PERR_NO_FI); 1224 vap->iv_stats.is_mesh_fwd_nopath++; 1225 m_freem(mcopy); 1226 return; 1227 } 1228 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1229 } 1230 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1231 mccopy->mc_ttl--; 1232 1233 /* XXX calculate priority so drivers can find the tx queue */ 1234 M_WME_SETAC(mcopy, WME_AC_BE); 1235 1236 /* XXX do we know m_nextpkt is NULL? */ 1237 mcopy->m_pkthdr.rcvif = (void *) ni; 1238 1239 /* 1240 * XXX this bypasses all of the VAP TX handling; it passes frames 1241 * directly to the parent interface. 1242 * 1243 * Because of this, there's no TX lock being held as there's no 1244 * encaps state being used. 1245 * 1246 * Doing a direct parent transmit may not be the correct thing 1247 * to do here; we'll have to re-think this soon. 1248 */ 1249 IEEE80211_TX_LOCK(ic); 1250 err = ieee80211_parent_xmitpkt(ic, mcopy); 1251 IEEE80211_TX_UNLOCK(ic); 1252 if (err != 0) { 1253 /* NB: IFQ_HANDOFF reclaims mbuf */ 1254 ieee80211_free_node(ni); 1255 } else { 1256 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1257 } 1258 } 1259 1260 static struct mbuf * 1261 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1262 { 1263 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1264 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1265 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1266 sizeof(struct ieee80211_meshcntl_ae10)]; 1267 const struct ieee80211_qosframe_addr4 *wh; 1268 const struct ieee80211_meshcntl_ae10 *mc; 1269 struct ether_header *eh; 1270 struct llc *llc; 1271 int ae; 1272 1273 if (m->m_len < hdrlen + sizeof(*llc) && 1274 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1275 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1276 "discard data frame: %s", "m_pullup failed"); 1277 vap->iv_stats.is_rx_tooshort++; 1278 return NULL; 1279 } 1280 memcpy(b, mtod(m, caddr_t), hdrlen); 1281 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1282 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1283 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1284 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1285 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1286 1287 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1288 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1289 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1290 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1291 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1292 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1293 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1294 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1295 llc = NULL; 1296 } else { 1297 m_adj(m, hdrlen - sizeof(*eh)); 1298 } 1299 eh = mtod(m, struct ether_header *); 1300 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1301 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1302 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1303 if (ae == IEEE80211_MESH_AE_00) { 1304 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1305 } else if (ae == IEEE80211_MESH_AE_01) { 1306 IEEE80211_ADDR_COPY(eh->ether_shost, 1307 MC01(mc)->mc_addr4); 1308 } else { 1309 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1310 (const struct ieee80211_frame *)wh, NULL, 1311 "bad AE %d", ae); 1312 vap->iv_stats.is_mesh_badae++; 1313 m_freem(m); 1314 return NULL; 1315 } 1316 } else { 1317 if (ae == IEEE80211_MESH_AE_00) { 1318 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1319 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1320 } else if (ae == IEEE80211_MESH_AE_10) { 1321 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1322 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1323 } else { 1324 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1325 (const struct ieee80211_frame *)wh, NULL, 1326 "bad AE %d", ae); 1327 vap->iv_stats.is_mesh_badae++; 1328 m_freem(m); 1329 return NULL; 1330 } 1331 } 1332 #ifndef __NO_STRICT_ALIGNMENT 1333 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1334 m = ieee80211_realign(vap, m, sizeof(*eh)); 1335 if (m == NULL) 1336 return NULL; 1337 } 1338 #endif /* !__NO_STRICT_ALIGNMENT */ 1339 if (llc != NULL) { 1340 eh = mtod(m, struct ether_header *); 1341 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1342 } 1343 return m; 1344 #undef WDIR 1345 #undef MC01 1346 } 1347 1348 /* 1349 * Return non-zero if the unicast mesh data frame should be processed 1350 * locally. Frames that are not proxy'd have our address, otherwise 1351 * we need to consult the routing table to look for a proxy entry. 1352 */ 1353 static __inline int 1354 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1355 const struct ieee80211_meshcntl *mc) 1356 { 1357 int ae = mc->mc_flags & 3; 1358 1359 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1360 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1361 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1362 ("bad AE %d", ae)); 1363 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1364 const struct ieee80211_meshcntl_ae10 *mc10 = 1365 (const struct ieee80211_meshcntl_ae10 *) mc; 1366 struct ieee80211_mesh_route *rt = 1367 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1368 /* check for proxy route to ourself */ 1369 return (rt != NULL && 1370 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1371 } else /* ucast w/o proxy */ 1372 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1373 } 1374 1375 /* 1376 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1377 * > 0 means we have forwarded data and no need to process locally 1378 * == 0 means we want to process locally (and we may have forwarded data 1379 * < 0 means there was an error and data should be discarded 1380 */ 1381 static int 1382 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1383 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1384 { 1385 struct ieee80211_qosframe_addr4 *qwh; 1386 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1387 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1388 1389 /* This is called from the RX path - don't hold this lock */ 1390 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1391 1392 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1393 1394 /* 1395 * TODO: 1396 * o verify addr2 is a legitimate transmitter 1397 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1398 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1399 */ 1400 1401 /* set lifetime of addr3 (meshDA) to initial value */ 1402 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1403 if (rt_meshda == NULL) { 1404 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1405 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1406 /* 1407 * [Optional] any of the following three actions: 1408 * o silently discard [X] 1409 * o trigger a path discovery [ ] 1410 * o inform TA that meshDA is unknown. [ ] 1411 */ 1412 /* XXX: stats */ 1413 return (-1); 1414 } 1415 1416 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1417 ms->ms_ppath->mpp_inact)); 1418 1419 /* set lifetime of addr4 (meshSA) to initial value */ 1420 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1421 KASSERT(rt_meshsa != NULL, ("no route")); 1422 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1423 ms->ms_ppath->mpp_inact)); 1424 1425 mesh_forward(vap, m, mc); 1426 return (1); /* dont process locally */ 1427 } 1428 1429 /* 1430 * Verifies transmitter, updates lifetime, precursor list and process data 1431 * locally, if data is proxy with AE = 10 it could mean data should go 1432 * on another mesh path or data should be forwarded to the DS. 1433 * 1434 * > 0 means we have forwarded data and no need to process locally 1435 * == 0 means we want to process locally (and we may have forwarded data 1436 * < 0 means there was an error and data should be discarded 1437 */ 1438 static int 1439 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1440 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1441 { 1442 struct ieee80211_qosframe_addr4 *qwh; 1443 const struct ieee80211_meshcntl_ae10 *mc10; 1444 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1445 struct ieee80211_mesh_route *rt; 1446 int ae; 1447 1448 /* This is called from the RX path - don't hold this lock */ 1449 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1450 1451 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1452 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1453 1454 /* 1455 * TODO: 1456 * o verify addr2 is a legitimate transmitter 1457 * o lifetime of precursor entry is max(init, curr) 1458 */ 1459 1460 /* set lifetime of addr4 (meshSA) to initial value */ 1461 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1462 KASSERT(rt != NULL, ("no route")); 1463 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1464 rt = NULL; 1465 1466 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1467 KASSERT(ae == IEEE80211_MESH_AE_00 || 1468 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1469 if (ae == IEEE80211_MESH_AE_10) { 1470 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1471 return (0); /* process locally */ 1472 } 1473 1474 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1475 if (rt != NULL && 1476 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1477 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1478 /* 1479 * Forward on another mesh-path, according to 1480 * amendment as specified in 9.32.4.1 1481 */ 1482 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1483 mesh_forward(vap, m, 1484 (const struct ieee80211_meshcntl *)mc10); 1485 return (1); /* dont process locally */ 1486 } 1487 /* 1488 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1489 * addressed according to 13.11.3.2. 1490 */ 1491 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1492 "forward frame to DS, SA(%6D) DA(%6D)", 1493 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1494 } 1495 return (0); /* process locally */ 1496 } 1497 1498 /* 1499 * Try to forward the group addressed data on to other mesh STAs, and 1500 * also to the DS. 1501 * 1502 * > 0 means we have forwarded data and no need to process locally 1503 * == 0 means we want to process locally (and we may have forwarded data 1504 * < 0 means there was an error and data should be discarded 1505 */ 1506 static int 1507 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1508 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1509 { 1510 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1511 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1512 1513 /* This is called from the RX path - don't hold this lock */ 1514 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1515 1516 mesh_forward(vap, m, mc); 1517 1518 if(mc->mc_ttl > 0) { 1519 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1520 /* 1521 * Forward of MSDUs from the MBSS to DS group addressed 1522 * (according to 13.11.3.2) 1523 * This happens by delivering the packet, and a bridge 1524 * will sent it on another port member. 1525 */ 1526 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1527 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1528 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1529 MC01(mc)->mc_addr4, "%s", 1530 "forward from MBSS to the DS"); 1531 } 1532 } 1533 return (0); /* process locally */ 1534 #undef MC01 1535 } 1536 1537 static int 1538 mesh_input(struct ieee80211_node *ni, struct mbuf *m, 1539 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1540 { 1541 #define HAS_SEQ(type) ((type & 0x4) == 0) 1542 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1543 #define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1544 struct ieee80211vap *vap = ni->ni_vap; 1545 struct ieee80211com *ic = ni->ni_ic; 1546 struct ifnet *ifp = vap->iv_ifp; 1547 struct ieee80211_frame *wh; 1548 const struct ieee80211_meshcntl *mc; 1549 int hdrspace, meshdrlen, need_tap, error; 1550 uint8_t dir, type, subtype, ae; 1551 uint32_t seq; 1552 const uint8_t *addr; 1553 uint8_t qos[2]; 1554 ieee80211_seq rxseq; 1555 1556 KASSERT(ni != NULL, ("null node")); 1557 ni->ni_inact = ni->ni_inact_reload; 1558 1559 need_tap = 1; /* mbuf need to be tapped. */ 1560 type = -1; /* undefined */ 1561 1562 /* This is called from the RX path - don't hold this lock */ 1563 IEEE80211_TX_UNLOCK_ASSERT(ic); 1564 1565 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1566 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1567 ni->ni_macaddr, NULL, 1568 "too short (1): len %u", m->m_pkthdr.len); 1569 vap->iv_stats.is_rx_tooshort++; 1570 goto out; 1571 } 1572 /* 1573 * Bit of a cheat here, we use a pointer for a 3-address 1574 * frame format but don't reference fields past outside 1575 * ieee80211_frame_min w/o first validating the data is 1576 * present. 1577 */ 1578 wh = mtod(m, struct ieee80211_frame *); 1579 1580 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1581 IEEE80211_FC0_VERSION_0) { 1582 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1583 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1584 vap->iv_stats.is_rx_badversion++; 1585 goto err; 1586 } 1587 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1588 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1589 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1590 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1591 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1592 ni->ni_noise = nf; 1593 if (HAS_SEQ(type)) { 1594 uint8_t tid = ieee80211_gettid(wh); 1595 1596 if (IEEE80211_QOS_HAS_SEQ(wh) && 1597 TID_TO_WME_AC(tid) >= WME_AC_VI) 1598 ic->ic_wme.wme_hipri_traffic++; 1599 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1600 if (! ieee80211_check_rxseq(ni, wh)) { 1601 /* duplicate, discard */ 1602 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1603 wh->i_addr1, "duplicate", 1604 "seqno <%u,%u> fragno <%u,%u> tid %u", 1605 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1606 ni->ni_rxseqs[tid] >> 1607 IEEE80211_SEQ_SEQ_SHIFT, 1608 rxseq & IEEE80211_SEQ_FRAG_MASK, 1609 ni->ni_rxseqs[tid] & 1610 IEEE80211_SEQ_FRAG_MASK, 1611 tid); 1612 vap->iv_stats.is_rx_dup++; 1613 IEEE80211_NODE_STAT(ni, rx_dup); 1614 goto out; 1615 } 1616 ni->ni_rxseqs[tid] = rxseq; 1617 } 1618 } 1619 #ifdef IEEE80211_DEBUG 1620 /* 1621 * It's easier, but too expensive, to simulate different mesh 1622 * topologies by consulting the ACL policy very early, so do this 1623 * only under DEBUG. 1624 * 1625 * NB: this check is also done upon peering link initiation. 1626 */ 1627 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1628 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1629 wh, NULL, "%s", "disallowed by ACL"); 1630 vap->iv_stats.is_rx_acl++; 1631 goto out; 1632 } 1633 #endif 1634 switch (type) { 1635 case IEEE80211_FC0_TYPE_DATA: 1636 if (ni == vap->iv_bss) 1637 goto out; 1638 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1639 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1640 ni->ni_macaddr, NULL, 1641 "peer link not yet established (%d)", 1642 ni->ni_mlstate); 1643 vap->iv_stats.is_mesh_nolink++; 1644 goto out; 1645 } 1646 if (dir != IEEE80211_FC1_DIR_FROMDS && 1647 dir != IEEE80211_FC1_DIR_DSTODS) { 1648 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1649 wh, "data", "incorrect dir 0x%x", dir); 1650 vap->iv_stats.is_rx_wrongdir++; 1651 goto err; 1652 } 1653 1654 /* All Mesh data frames are QoS subtype */ 1655 if (!HAS_SEQ(type)) { 1656 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1657 wh, "data", "incorrect subtype 0x%x", subtype); 1658 vap->iv_stats.is_rx_badsubtype++; 1659 goto err; 1660 } 1661 1662 /* 1663 * Next up, any fragmentation. 1664 * XXX: we defrag before we even try to forward, 1665 * Mesh Control field is not present in sub-sequent 1666 * fragmented frames. This is in contrast to Draft 4.0. 1667 */ 1668 hdrspace = ieee80211_hdrspace(ic, wh); 1669 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1670 m = ieee80211_defrag(ni, m, hdrspace); 1671 if (m == NULL) { 1672 /* Fragment dropped or frame not complete yet */ 1673 goto out; 1674 } 1675 } 1676 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1677 1678 /* 1679 * Now we have a complete Mesh Data frame. 1680 */ 1681 1682 /* 1683 * Only fromDStoDS data frames use 4 address qos frames 1684 * as specified in amendment. Otherwise addr4 is located 1685 * in the Mesh Control field and a 3 address qos frame 1686 * is used. 1687 */ 1688 if (IEEE80211_IS_DSTODS(wh)) 1689 *(uint16_t *)qos = *(uint16_t *) 1690 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1691 else 1692 *(uint16_t *)qos = *(uint16_t *) 1693 ((struct ieee80211_qosframe *)wh)->i_qos; 1694 1695 /* 1696 * NB: The mesh STA sets the Mesh Control Present 1697 * subfield to 1 in the Mesh Data frame containing 1698 * an unfragmented MSDU, an A-MSDU, or the first 1699 * fragment of an MSDU. 1700 * After defrag it should always be present. 1701 */ 1702 if (!(qos[1] & IEEE80211_QOS_MC)) { 1703 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1704 ni->ni_macaddr, NULL, 1705 "%s", "Mesh control field not present"); 1706 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1707 goto err; 1708 } 1709 1710 /* pull up enough to get to the mesh control */ 1711 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1712 (m = m_pullup(m, hdrspace + 1713 sizeof(struct ieee80211_meshcntl))) == NULL) { 1714 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1715 ni->ni_macaddr, NULL, 1716 "data too short: expecting %u", hdrspace); 1717 vap->iv_stats.is_rx_tooshort++; 1718 goto out; /* XXX */ 1719 } 1720 /* 1721 * Now calculate the full extent of the headers. Note 1722 * mesh_decap will pull up anything we didn't get 1723 * above when it strips the 802.11 headers. 1724 */ 1725 mc = (const struct ieee80211_meshcntl *) 1726 (mtod(m, const uint8_t *) + hdrspace); 1727 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1728 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1729 ae * IEEE80211_ADDR_LEN; 1730 hdrspace += meshdrlen; 1731 1732 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1733 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1734 (m->m_len < hdrspace) && 1735 ((m = m_pullup(m, hdrspace)) == NULL)) { 1736 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1737 ni->ni_macaddr, NULL, 1738 "data too short: expecting %u", hdrspace); 1739 vap->iv_stats.is_rx_tooshort++; 1740 goto out; /* XXX */ 1741 } 1742 /* XXX: are we sure there is no reallocating after m_pullup? */ 1743 1744 seq = LE_READ_4(mc->mc_seq); 1745 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1746 addr = wh->i_addr3; 1747 else if (ae == IEEE80211_MESH_AE_01) 1748 addr = MC01(mc)->mc_addr4; 1749 else 1750 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1751 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1752 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1753 addr, "data", "%s", "not to me"); 1754 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1755 goto out; 1756 } 1757 if (mesh_checkpseq(vap, addr, seq) != 0) { 1758 vap->iv_stats.is_rx_dup++; 1759 goto out; 1760 } 1761 1762 /* This code "routes" the frame to the right control path */ 1763 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1764 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1765 error = 1766 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1767 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1768 error = mesh_recv_group_data(vap, m, wh, mc); 1769 else 1770 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1771 wh, mc); 1772 } else 1773 error = mesh_recv_group_data(vap, m, wh, mc); 1774 if (error < 0) 1775 goto err; 1776 else if (error > 0) 1777 goto out; 1778 1779 if (ieee80211_radiotap_active_vap(vap)) 1780 ieee80211_radiotap_rx(vap, m); 1781 need_tap = 0; 1782 1783 /* 1784 * Finally, strip the 802.11 header. 1785 */ 1786 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1787 if (m == NULL) { 1788 /* XXX mask bit to check for both */ 1789 /* don't count Null data frames as errors */ 1790 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1791 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1792 goto out; 1793 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1794 ni->ni_macaddr, "data", "%s", "decap error"); 1795 vap->iv_stats.is_rx_decap++; 1796 IEEE80211_NODE_STAT(ni, rx_decap); 1797 goto err; 1798 } 1799 if (qos[0] & IEEE80211_QOS_AMSDU) { 1800 m = ieee80211_decap_amsdu(ni, m); 1801 if (m == NULL) 1802 return IEEE80211_FC0_TYPE_DATA; 1803 } 1804 ieee80211_deliver_data(vap, ni, m); 1805 return type; 1806 case IEEE80211_FC0_TYPE_MGT: 1807 vap->iv_stats.is_rx_mgmt++; 1808 IEEE80211_NODE_STAT(ni, rx_mgmt); 1809 if (dir != IEEE80211_FC1_DIR_NODS) { 1810 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1811 wh, "mgt", "incorrect dir 0x%x", dir); 1812 vap->iv_stats.is_rx_wrongdir++; 1813 goto err; 1814 } 1815 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1816 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1817 ni->ni_macaddr, "mgt", "too short: len %u", 1818 m->m_pkthdr.len); 1819 vap->iv_stats.is_rx_tooshort++; 1820 goto out; 1821 } 1822 #ifdef IEEE80211_DEBUG 1823 if ((ieee80211_msg_debug(vap) && 1824 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1825 ieee80211_msg_dumppkts(vap)) { 1826 if_printf(ifp, "received %s from %s rssi %d\n", 1827 ieee80211_mgt_subtype_name[subtype >> 1828 IEEE80211_FC0_SUBTYPE_SHIFT], 1829 ether_sprintf(wh->i_addr2), rssi); 1830 } 1831 #endif 1832 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1833 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1834 wh, NULL, "%s", "WEP set but not permitted"); 1835 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1836 goto out; 1837 } 1838 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 1839 goto out; 1840 case IEEE80211_FC0_TYPE_CTL: 1841 vap->iv_stats.is_rx_ctl++; 1842 IEEE80211_NODE_STAT(ni, rx_ctrl); 1843 goto out; 1844 default: 1845 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1846 wh, "bad", "frame type 0x%x", type); 1847 /* should not come here */ 1848 break; 1849 } 1850 err: 1851 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1852 out: 1853 if (m != NULL) { 1854 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1855 ieee80211_radiotap_rx(vap, m); 1856 m_freem(m); 1857 } 1858 return type; 1859 #undef HAS_SEQ 1860 #undef MC01 1861 #undef MC10 1862 } 1863 1864 static void 1865 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1866 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1867 { 1868 struct ieee80211vap *vap = ni->ni_vap; 1869 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1870 struct ieee80211com *ic = ni->ni_ic; 1871 struct ieee80211_channel *rxchan = ic->ic_curchan; 1872 struct ieee80211_frame *wh; 1873 struct ieee80211_mesh_route *rt; 1874 uint8_t *frm, *efrm; 1875 1876 wh = mtod(m0, struct ieee80211_frame *); 1877 frm = (uint8_t *)&wh[1]; 1878 efrm = mtod(m0, uint8_t *) + m0->m_len; 1879 switch (subtype) { 1880 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1881 case IEEE80211_FC0_SUBTYPE_BEACON: 1882 { 1883 struct ieee80211_scanparams scan; 1884 struct ieee80211_channel *c; 1885 /* 1886 * We process beacon/probe response 1887 * frames to discover neighbors. 1888 */ 1889 if (rxs != NULL) { 1890 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1891 if (c != NULL) 1892 rxchan = c; 1893 } 1894 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) 1895 return; 1896 /* 1897 * Count frame now that we know it's to be processed. 1898 */ 1899 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1900 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1901 IEEE80211_NODE_STAT(ni, rx_beacons); 1902 } else 1903 IEEE80211_NODE_STAT(ni, rx_proberesp); 1904 /* 1905 * If scanning, just pass information to the scan module. 1906 */ 1907 if (ic->ic_flags & IEEE80211_F_SCAN) { 1908 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1909 /* 1910 * Actively scanning a channel marked passive; 1911 * send a probe request now that we know there 1912 * is 802.11 traffic present. 1913 * 1914 * XXX check if the beacon we recv'd gives 1915 * us what we need and suppress the probe req 1916 */ 1917 ieee80211_probe_curchan(vap, 1); 1918 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1919 } 1920 ieee80211_add_scan(vap, rxchan, &scan, wh, 1921 subtype, rssi, nf); 1922 return; 1923 } 1924 1925 /* The rest of this code assumes we are running */ 1926 if (vap->iv_state != IEEE80211_S_RUN) 1927 return; 1928 /* 1929 * Ignore non-mesh STAs. 1930 */ 1931 if ((scan.capinfo & 1932 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1933 scan.meshid == NULL || scan.meshconf == NULL) { 1934 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1935 wh, "beacon", "%s", "not a mesh sta"); 1936 vap->iv_stats.is_mesh_wrongmesh++; 1937 return; 1938 } 1939 /* 1940 * Ignore STAs for other mesh networks. 1941 */ 1942 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1943 mesh_verify_meshconf(vap, scan.meshconf)) { 1944 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1945 wh, "beacon", "%s", "not for our mesh"); 1946 vap->iv_stats.is_mesh_wrongmesh++; 1947 return; 1948 } 1949 /* 1950 * Peer only based on the current ACL policy. 1951 */ 1952 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1953 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1954 wh, NULL, "%s", "disallowed by ACL"); 1955 vap->iv_stats.is_rx_acl++; 1956 return; 1957 } 1958 /* 1959 * Do neighbor discovery. 1960 */ 1961 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1962 /* 1963 * Create a new entry in the neighbor table. 1964 */ 1965 ni = ieee80211_add_neighbor(vap, wh, &scan); 1966 } 1967 /* 1968 * Automatically peer with discovered nodes if possible. 1969 */ 1970 if (ni != vap->iv_bss && 1971 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1972 switch (ni->ni_mlstate) { 1973 case IEEE80211_NODE_MESH_IDLE: 1974 { 1975 uint16_t args[1]; 1976 1977 /* Wait for backoff callout to reset counter */ 1978 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1979 return; 1980 1981 ni->ni_mlpid = mesh_generateid(vap); 1982 if (ni->ni_mlpid == 0) 1983 return; 1984 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1985 args[0] = ni->ni_mlpid; 1986 ieee80211_send_action(ni, 1987 IEEE80211_ACTION_CAT_SELF_PROT, 1988 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1989 ni->ni_mlrcnt = 0; 1990 mesh_peer_timeout_setup(ni); 1991 break; 1992 } 1993 case IEEE80211_NODE_MESH_ESTABLISHED: 1994 { 1995 /* 1996 * Valid beacon from a peer mesh STA 1997 * bump TA lifetime 1998 */ 1999 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 2000 if(rt != NULL) { 2001 ieee80211_mesh_rt_update(rt, 2002 ticks_to_msecs( 2003 ms->ms_ppath->mpp_inact)); 2004 } 2005 break; 2006 } 2007 default: 2008 break; /* ignore */ 2009 } 2010 } 2011 break; 2012 } 2013 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2014 { 2015 uint8_t *ssid, *meshid, *rates, *xrates; 2016 uint8_t *sfrm; 2017 2018 if (vap->iv_state != IEEE80211_S_RUN) { 2019 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2020 wh, NULL, "wrong state %s", 2021 ieee80211_state_name[vap->iv_state]); 2022 vap->iv_stats.is_rx_mgtdiscard++; 2023 return; 2024 } 2025 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 2026 /* frame must be directed */ 2027 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2028 wh, NULL, "%s", "not unicast"); 2029 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 2030 return; 2031 } 2032 /* 2033 * prreq frame format 2034 * [tlv] ssid 2035 * [tlv] supported rates 2036 * [tlv] extended supported rates 2037 * [tlv] mesh id 2038 */ 2039 ssid = meshid = rates = xrates = NULL; 2040 sfrm = frm; 2041 while (efrm - frm > 1) { 2042 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2043 switch (*frm) { 2044 case IEEE80211_ELEMID_SSID: 2045 ssid = frm; 2046 break; 2047 case IEEE80211_ELEMID_RATES: 2048 rates = frm; 2049 break; 2050 case IEEE80211_ELEMID_XRATES: 2051 xrates = frm; 2052 break; 2053 case IEEE80211_ELEMID_MESHID: 2054 meshid = frm; 2055 break; 2056 } 2057 frm += frm[1] + 2; 2058 } 2059 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2060 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2061 if (xrates != NULL) 2062 IEEE80211_VERIFY_ELEMENT(xrates, 2063 IEEE80211_RATE_MAXSIZE - rates[1], return); 2064 if (meshid != NULL) { 2065 IEEE80211_VERIFY_ELEMENT(meshid, 2066 IEEE80211_MESHID_LEN, return); 2067 /* NB: meshid, not ssid */ 2068 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2069 } 2070 2071 /* XXX find a better class or define it's own */ 2072 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2073 "%s", "recv probe req"); 2074 /* 2075 * Some legacy 11b clients cannot hack a complete 2076 * probe response frame. When the request includes 2077 * only a bare-bones rate set, communicate this to 2078 * the transmit side. 2079 */ 2080 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2081 break; 2082 } 2083 2084 case IEEE80211_FC0_SUBTYPE_ACTION: 2085 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2086 if (ni == vap->iv_bss) { 2087 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2088 wh, NULL, "%s", "unknown node"); 2089 vap->iv_stats.is_rx_mgtdiscard++; 2090 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2091 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2092 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2093 wh, NULL, "%s", "not for us"); 2094 vap->iv_stats.is_rx_mgtdiscard++; 2095 } else if (vap->iv_state != IEEE80211_S_RUN) { 2096 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2097 wh, NULL, "wrong state %s", 2098 ieee80211_state_name[vap->iv_state]); 2099 vap->iv_stats.is_rx_mgtdiscard++; 2100 } else { 2101 if (ieee80211_parse_action(ni, m0) == 0) 2102 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2103 } 2104 break; 2105 2106 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2107 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2108 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2109 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2110 case IEEE80211_FC0_SUBTYPE_ATIM: 2111 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2112 case IEEE80211_FC0_SUBTYPE_AUTH: 2113 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2114 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2115 wh, NULL, "%s", "not handled"); 2116 vap->iv_stats.is_rx_mgtdiscard++; 2117 break; 2118 2119 default: 2120 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2121 wh, "mgt", "subtype 0x%x not handled", subtype); 2122 vap->iv_stats.is_rx_badsubtype++; 2123 break; 2124 } 2125 } 2126 2127 static void 2128 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2129 { 2130 2131 switch (subtype) { 2132 case IEEE80211_FC0_SUBTYPE_BAR: 2133 ieee80211_recv_bar(ni, m); 2134 break; 2135 } 2136 } 2137 2138 /* 2139 * Parse meshpeering action ie's for MPM frames 2140 */ 2141 static const struct ieee80211_meshpeer_ie * 2142 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2143 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2144 const uint8_t *frm, const uint8_t *efrm, 2145 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2146 { 2147 struct ieee80211vap *vap = ni->ni_vap; 2148 const struct ieee80211_meshpeer_ie *mpie; 2149 uint16_t args[3]; 2150 const uint8_t *meshid, *meshconf, *meshpeer; 2151 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2152 2153 meshid = meshconf = meshpeer = NULL; 2154 while (efrm - frm > 1) { 2155 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2156 switch (*frm) { 2157 case IEEE80211_ELEMID_MESHID: 2158 meshid = frm; 2159 break; 2160 case IEEE80211_ELEMID_MESHCONF: 2161 meshconf = frm; 2162 break; 2163 case IEEE80211_ELEMID_MESHPEER: 2164 meshpeer = frm; 2165 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2166 memset(mp, 0, sizeof(*mp)); 2167 mp->peer_len = mpie->peer_len; 2168 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 2169 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 2170 switch (subtype) { 2171 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2172 mp->peer_linkid = 2173 LE_READ_2(&mpie->peer_linkid); 2174 break; 2175 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2176 /* NB: peer link ID is optional */ 2177 if (mpie->peer_len == 2178 (IEEE80211_MPM_BASE_SZ + 2)) { 2179 mp->peer_linkid = 0; 2180 mp->peer_rcode = 2181 LE_READ_2(&mpie->peer_linkid); 2182 } else { 2183 mp->peer_linkid = 2184 LE_READ_2(&mpie->peer_linkid); 2185 mp->peer_rcode = 2186 LE_READ_2(&mpie->peer_rcode); 2187 } 2188 break; 2189 } 2190 break; 2191 } 2192 frm += frm[1] + 2; 2193 } 2194 2195 /* 2196 * Verify the contents of the frame. 2197 * If it fails validation, close the peer link. 2198 */ 2199 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2200 sendclose = 1; 2201 IEEE80211_DISCARD(vap, 2202 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2203 wh, NULL, "%s", "MPM validation failed"); 2204 } 2205 2206 /* If meshid is not the same reject any frames type. */ 2207 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2208 sendclose = 1; 2209 IEEE80211_DISCARD(vap, 2210 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2211 wh, NULL, "%s", "not for our mesh"); 2212 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2213 /* 2214 * Standard not clear about this, if we dont ignore 2215 * there will be an endless loop between nodes sending 2216 * CLOSE frames between each other with wrong meshid. 2217 * Discard and timers will bring FSM to IDLE state. 2218 */ 2219 return NULL; 2220 } 2221 } 2222 2223 /* 2224 * Close frames are accepted if meshid is the same. 2225 * Verify the other two types. 2226 */ 2227 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2228 mesh_verify_meshconf(vap, meshconf)) { 2229 sendclose = 1; 2230 IEEE80211_DISCARD(vap, 2231 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2232 wh, NULL, "%s", "configuration missmatch"); 2233 } 2234 2235 if (sendclose) { 2236 vap->iv_stats.is_rx_mgtdiscard++; 2237 switch (ni->ni_mlstate) { 2238 case IEEE80211_NODE_MESH_IDLE: 2239 case IEEE80211_NODE_MESH_ESTABLISHED: 2240 case IEEE80211_NODE_MESH_HOLDING: 2241 /* ignore */ 2242 break; 2243 case IEEE80211_NODE_MESH_OPENSNT: 2244 case IEEE80211_NODE_MESH_OPENRCV: 2245 case IEEE80211_NODE_MESH_CONFIRMRCV: 2246 args[0] = ni->ni_mlpid; 2247 args[1] = ni->ni_mllid; 2248 /* Reason codes for rejection */ 2249 switch (subtype) { 2250 case IEEE80211_ACTION_MESHPEERING_OPEN: 2251 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2252 break; 2253 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2254 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2255 break; 2256 } 2257 ieee80211_send_action(ni, 2258 IEEE80211_ACTION_CAT_SELF_PROT, 2259 IEEE80211_ACTION_MESHPEERING_CLOSE, 2260 args); 2261 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2262 mesh_peer_timeout_setup(ni); 2263 break; 2264 } 2265 return NULL; 2266 } 2267 2268 return (const struct ieee80211_meshpeer_ie *) mp; 2269 } 2270 2271 static int 2272 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2273 const struct ieee80211_frame *wh, 2274 const uint8_t *frm, const uint8_t *efrm) 2275 { 2276 struct ieee80211vap *vap = ni->ni_vap; 2277 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2278 struct ieee80211_meshpeer_ie ie; 2279 const struct ieee80211_meshpeer_ie *meshpeer; 2280 uint16_t args[3]; 2281 2282 /* +2+2 for action + code + capabilites */ 2283 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2284 IEEE80211_ACTION_MESHPEERING_OPEN); 2285 if (meshpeer == NULL) { 2286 return 0; 2287 } 2288 2289 /* XXX move up */ 2290 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2291 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2292 2293 switch (ni->ni_mlstate) { 2294 case IEEE80211_NODE_MESH_IDLE: 2295 /* Reject open request if reached our maximum neighbor count */ 2296 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2297 args[0] = meshpeer->peer_llinkid; 2298 args[1] = 0; 2299 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2300 ieee80211_send_action(ni, 2301 IEEE80211_ACTION_CAT_SELF_PROT, 2302 IEEE80211_ACTION_MESHPEERING_CLOSE, 2303 args); 2304 /* stay in IDLE state */ 2305 return (0); 2306 } 2307 /* Open frame accepted */ 2308 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2309 ni->ni_mllid = meshpeer->peer_llinkid; 2310 ni->ni_mlpid = mesh_generateid(vap); 2311 if (ni->ni_mlpid == 0) 2312 return 0; /* XXX */ 2313 args[0] = ni->ni_mlpid; 2314 /* Announce we're open too... */ 2315 ieee80211_send_action(ni, 2316 IEEE80211_ACTION_CAT_SELF_PROT, 2317 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2318 /* ...and confirm the link. */ 2319 args[0] = ni->ni_mlpid; 2320 args[1] = ni->ni_mllid; 2321 ieee80211_send_action(ni, 2322 IEEE80211_ACTION_CAT_SELF_PROT, 2323 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2324 args); 2325 mesh_peer_timeout_setup(ni); 2326 break; 2327 case IEEE80211_NODE_MESH_OPENRCV: 2328 /* Wrong Link ID */ 2329 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2330 args[0] = ni->ni_mllid; 2331 args[1] = ni->ni_mlpid; 2332 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2333 ieee80211_send_action(ni, 2334 IEEE80211_ACTION_CAT_SELF_PROT, 2335 IEEE80211_ACTION_MESHPEERING_CLOSE, 2336 args); 2337 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2338 mesh_peer_timeout_setup(ni); 2339 break; 2340 } 2341 /* Duplicate open, confirm again. */ 2342 args[0] = ni->ni_mlpid; 2343 args[1] = ni->ni_mllid; 2344 ieee80211_send_action(ni, 2345 IEEE80211_ACTION_CAT_SELF_PROT, 2346 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2347 args); 2348 break; 2349 case IEEE80211_NODE_MESH_OPENSNT: 2350 ni->ni_mllid = meshpeer->peer_llinkid; 2351 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2352 args[0] = ni->ni_mlpid; 2353 args[1] = ni->ni_mllid; 2354 ieee80211_send_action(ni, 2355 IEEE80211_ACTION_CAT_SELF_PROT, 2356 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2357 args); 2358 /* NB: don't setup/clear any timeout */ 2359 break; 2360 case IEEE80211_NODE_MESH_CONFIRMRCV: 2361 if (ni->ni_mlpid != meshpeer->peer_linkid || 2362 ni->ni_mllid != meshpeer->peer_llinkid) { 2363 args[0] = ni->ni_mlpid; 2364 args[1] = ni->ni_mllid; 2365 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2366 ieee80211_send_action(ni, 2367 IEEE80211_ACTION_CAT_SELF_PROT, 2368 IEEE80211_ACTION_MESHPEERING_CLOSE, 2369 args); 2370 mesh_linkchange(ni, 2371 IEEE80211_NODE_MESH_HOLDING); 2372 mesh_peer_timeout_setup(ni); 2373 break; 2374 } 2375 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2376 ni->ni_mllid = meshpeer->peer_llinkid; 2377 args[0] = ni->ni_mlpid; 2378 args[1] = ni->ni_mllid; 2379 ieee80211_send_action(ni, 2380 IEEE80211_ACTION_CAT_SELF_PROT, 2381 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2382 args); 2383 mesh_peer_timeout_stop(ni); 2384 break; 2385 case IEEE80211_NODE_MESH_ESTABLISHED: 2386 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2387 args[0] = ni->ni_mllid; 2388 args[1] = ni->ni_mlpid; 2389 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2390 ieee80211_send_action(ni, 2391 IEEE80211_ACTION_CAT_SELF_PROT, 2392 IEEE80211_ACTION_MESHPEERING_CLOSE, 2393 args); 2394 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2395 mesh_peer_timeout_setup(ni); 2396 break; 2397 } 2398 args[0] = ni->ni_mlpid; 2399 args[1] = ni->ni_mllid; 2400 ieee80211_send_action(ni, 2401 IEEE80211_ACTION_CAT_SELF_PROT, 2402 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2403 args); 2404 break; 2405 case IEEE80211_NODE_MESH_HOLDING: 2406 args[0] = ni->ni_mlpid; 2407 args[1] = meshpeer->peer_llinkid; 2408 /* Standard not clear about what the reaason code should be */ 2409 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2410 ieee80211_send_action(ni, 2411 IEEE80211_ACTION_CAT_SELF_PROT, 2412 IEEE80211_ACTION_MESHPEERING_CLOSE, 2413 args); 2414 break; 2415 } 2416 return 0; 2417 } 2418 2419 static int 2420 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2421 const struct ieee80211_frame *wh, 2422 const uint8_t *frm, const uint8_t *efrm) 2423 { 2424 struct ieee80211vap *vap = ni->ni_vap; 2425 struct ieee80211_meshpeer_ie ie; 2426 const struct ieee80211_meshpeer_ie *meshpeer; 2427 uint16_t args[3]; 2428 2429 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2430 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2431 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2432 if (meshpeer == NULL) { 2433 return 0; 2434 } 2435 2436 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2437 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2438 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2439 2440 switch (ni->ni_mlstate) { 2441 case IEEE80211_NODE_MESH_OPENRCV: 2442 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2443 mesh_peer_timeout_stop(ni); 2444 break; 2445 case IEEE80211_NODE_MESH_OPENSNT: 2446 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2447 mesh_peer_timeout_setup(ni); 2448 break; 2449 case IEEE80211_NODE_MESH_HOLDING: 2450 args[0] = ni->ni_mlpid; 2451 args[1] = meshpeer->peer_llinkid; 2452 /* Standard not clear about what the reaason code should be */ 2453 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2454 ieee80211_send_action(ni, 2455 IEEE80211_ACTION_CAT_SELF_PROT, 2456 IEEE80211_ACTION_MESHPEERING_CLOSE, 2457 args); 2458 break; 2459 case IEEE80211_NODE_MESH_CONFIRMRCV: 2460 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2461 args[0] = ni->ni_mlpid; 2462 args[1] = ni->ni_mllid; 2463 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2464 ieee80211_send_action(ni, 2465 IEEE80211_ACTION_CAT_SELF_PROT, 2466 IEEE80211_ACTION_MESHPEERING_CLOSE, 2467 args); 2468 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2469 mesh_peer_timeout_setup(ni); 2470 } 2471 break; 2472 default: 2473 IEEE80211_DISCARD(vap, 2474 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2475 wh, NULL, "received confirm in invalid state %d", 2476 ni->ni_mlstate); 2477 vap->iv_stats.is_rx_mgtdiscard++; 2478 break; 2479 } 2480 return 0; 2481 } 2482 2483 static int 2484 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2485 const struct ieee80211_frame *wh, 2486 const uint8_t *frm, const uint8_t *efrm) 2487 { 2488 struct ieee80211_meshpeer_ie ie; 2489 const struct ieee80211_meshpeer_ie *meshpeer; 2490 uint16_t args[3]; 2491 2492 /* +2 for action + code */ 2493 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2494 IEEE80211_ACTION_MESHPEERING_CLOSE); 2495 if (meshpeer == NULL) { 2496 return 0; 2497 } 2498 2499 /* 2500 * XXX: check reason code, for example we could receive 2501 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2502 * to peer again. 2503 */ 2504 2505 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2506 ni, "%s", "recv PEER CLOSE"); 2507 2508 switch (ni->ni_mlstate) { 2509 case IEEE80211_NODE_MESH_IDLE: 2510 /* ignore */ 2511 break; 2512 case IEEE80211_NODE_MESH_OPENRCV: 2513 case IEEE80211_NODE_MESH_OPENSNT: 2514 case IEEE80211_NODE_MESH_CONFIRMRCV: 2515 case IEEE80211_NODE_MESH_ESTABLISHED: 2516 args[0] = ni->ni_mlpid; 2517 args[1] = ni->ni_mllid; 2518 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2519 ieee80211_send_action(ni, 2520 IEEE80211_ACTION_CAT_SELF_PROT, 2521 IEEE80211_ACTION_MESHPEERING_CLOSE, 2522 args); 2523 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2524 mesh_peer_timeout_setup(ni); 2525 break; 2526 case IEEE80211_NODE_MESH_HOLDING: 2527 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2528 mesh_peer_timeout_stop(ni); 2529 break; 2530 } 2531 return 0; 2532 } 2533 2534 /* 2535 * Link Metric handling. 2536 */ 2537 static int 2538 mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2539 const struct ieee80211_frame *wh, 2540 const uint8_t *frm, const uint8_t *efrm) 2541 { 2542 const struct ieee80211_meshlmetric_ie *ie = 2543 (const struct ieee80211_meshlmetric_ie *) 2544 (frm+2); /* action + code */ 2545 struct ieee80211_meshlmetric_ie lm_rep; 2546 2547 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2548 lm_rep.lm_flags = 0; 2549 lm_rep.lm_metric = mesh_airtime_calc(ni); 2550 ieee80211_send_action(ni, 2551 IEEE80211_ACTION_CAT_MESH, 2552 IEEE80211_ACTION_MESH_LMETRIC, 2553 &lm_rep); 2554 } 2555 /* XXX: else do nothing for now */ 2556 return 0; 2557 } 2558 2559 /* 2560 * Parse meshgate action ie's for GANN frames. 2561 * Returns -1 if parsing fails, otherwise 0. 2562 */ 2563 static int 2564 mesh_parse_meshgate_action(struct ieee80211_node *ni, 2565 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2566 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2567 { 2568 struct ieee80211vap *vap = ni->ni_vap; 2569 const struct ieee80211_meshgann_ie *gannie; 2570 2571 while (efrm - frm > 1) { 2572 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2573 switch (*frm) { 2574 case IEEE80211_ELEMID_MESHGANN: 2575 gannie = (const struct ieee80211_meshgann_ie *) frm; 2576 memset(ie, 0, sizeof(*ie)); 2577 ie->gann_ie = gannie->gann_ie; 2578 ie->gann_len = gannie->gann_len; 2579 ie->gann_flags = gannie->gann_flags; 2580 ie->gann_hopcount = gannie->gann_hopcount; 2581 ie->gann_ttl = gannie->gann_ttl; 2582 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2583 ie->gann_seq = LE_READ_4(&gannie->gann_seq); 2584 ie->gann_interval = LE_READ_2(&gannie->gann_interval); 2585 break; 2586 } 2587 frm += frm[1] + 2; 2588 } 2589 2590 return 0; 2591 } 2592 2593 /* 2594 * Mesh Gate Announcement handling. 2595 */ 2596 static int 2597 mesh_recv_action_meshgate(struct ieee80211_node *ni, 2598 const struct ieee80211_frame *wh, 2599 const uint8_t *frm, const uint8_t *efrm) 2600 { 2601 struct ieee80211vap *vap = ni->ni_vap; 2602 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2603 struct ieee80211_mesh_gate_route *gr, *next; 2604 struct ieee80211_mesh_route *rt_gate; 2605 struct ieee80211_meshgann_ie pgann; 2606 struct ieee80211_meshgann_ie ie; 2607 int found = 0; 2608 2609 /* +2 for action + code */ 2610 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2611 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2612 ni->ni_macaddr, NULL, "%s", 2613 "GANN parsing failed"); 2614 vap->iv_stats.is_rx_mgtdiscard++; 2615 return (0); 2616 } 2617 2618 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2619 return 0; 2620 2621 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2622 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2623 ie.gann_seq); 2624 2625 if (ms == NULL) 2626 return (0); 2627 MESH_RT_LOCK(ms); 2628 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2629 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2630 continue; 2631 if (ie.gann_seq <= gr->gr_lastseq) { 2632 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2633 ni->ni_macaddr, NULL, 2634 "GANN old seqno %u <= %u", 2635 ie.gann_seq, gr->gr_lastseq); 2636 MESH_RT_UNLOCK(ms); 2637 return (0); 2638 } 2639 /* corresponding mesh gate found & GANN accepted */ 2640 found = 1; 2641 break; 2642 2643 } 2644 if (found == 0) { 2645 /* this GANN is from a new mesh Gate add it to known table. */ 2646 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2647 "stored new GANN information, seq %u.", ie.gann_seq); 2648 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2649 M_80211_MESH_GT_RT, 2650 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2651 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2652 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2653 } 2654 gr->gr_lastseq = ie.gann_seq; 2655 2656 /* check if we have a path to this gate */ 2657 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2658 if (rt_gate != NULL && 2659 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2660 gr->gr_route = rt_gate; 2661 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2662 } 2663 2664 MESH_RT_UNLOCK(ms); 2665 2666 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2667 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2668 return 0; 2669 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2670 pgann.gann_hopcount = ie.gann_hopcount + 1; 2671 pgann.gann_ttl = ie.gann_ttl - 1; 2672 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2673 pgann.gann_seq = ie.gann_seq; 2674 pgann.gann_interval = ie.gann_interval; 2675 2676 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2677 "%s", "propagate GANN"); 2678 2679 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2680 IEEE80211_ACTION_MESH_GANN, &pgann); 2681 2682 return 0; 2683 } 2684 2685 static int 2686 mesh_send_action(struct ieee80211_node *ni, 2687 const uint8_t sa[IEEE80211_ADDR_LEN], 2688 const uint8_t da[IEEE80211_ADDR_LEN], 2689 struct mbuf *m) 2690 { 2691 struct ieee80211vap *vap = ni->ni_vap; 2692 struct ieee80211com *ic = ni->ni_ic; 2693 struct ieee80211_bpf_params params; 2694 struct ieee80211_frame *wh; 2695 int ret; 2696 2697 KASSERT(ni != NULL, ("null node")); 2698 2699 if (vap->iv_state == IEEE80211_S_CAC) { 2700 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2701 "block %s frame in CAC state", "Mesh action"); 2702 vap->iv_stats.is_tx_badstate++; 2703 ieee80211_free_node(ni); 2704 m_freem(m); 2705 return EIO; /* XXX */ 2706 } 2707 2708 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2709 if (m == NULL) { 2710 ieee80211_free_node(ni); 2711 return ENOMEM; 2712 } 2713 2714 IEEE80211_TX_LOCK(ic); 2715 wh = mtod(m, struct ieee80211_frame *); 2716 ieee80211_send_setup(ni, m, 2717 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2718 IEEE80211_NONQOS_TID, sa, da, sa); 2719 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2720 2721 memset(¶ms, 0, sizeof(params)); 2722 params.ibp_pri = WME_AC_VO; 2723 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2724 if (IEEE80211_IS_MULTICAST(da)) 2725 params.ibp_try0 = 1; 2726 else 2727 params.ibp_try0 = ni->ni_txparms->maxretry; 2728 params.ibp_power = ni->ni_txpower; 2729 2730 IEEE80211_NODE_STAT(ni, tx_mgmt); 2731 2732 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2733 IEEE80211_TX_UNLOCK(ic); 2734 return (ret); 2735 } 2736 2737 #define ADDSHORT(frm, v) do { \ 2738 frm[0] = (v) & 0xff; \ 2739 frm[1] = (v) >> 8; \ 2740 frm += 2; \ 2741 } while (0) 2742 #define ADDWORD(frm, v) do { \ 2743 frm[0] = (v) & 0xff; \ 2744 frm[1] = ((v) >> 8) & 0xff; \ 2745 frm[2] = ((v) >> 16) & 0xff; \ 2746 frm[3] = ((v) >> 24) & 0xff; \ 2747 frm += 4; \ 2748 } while (0) 2749 2750 static int 2751 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2752 int category, int action, void *args0) 2753 { 2754 struct ieee80211vap *vap = ni->ni_vap; 2755 struct ieee80211com *ic = ni->ni_ic; 2756 uint16_t *args = args0; 2757 const struct ieee80211_rateset *rs; 2758 struct mbuf *m; 2759 uint8_t *frm; 2760 2761 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2762 "send PEER OPEN action: localid 0x%x", args[0]); 2763 2764 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2765 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2766 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2767 ieee80211_ref_node(ni); 2768 2769 m = ieee80211_getmgtframe(&frm, 2770 ic->ic_headroom + sizeof(struct ieee80211_frame), 2771 sizeof(uint16_t) /* action+category */ 2772 + sizeof(uint16_t) /* capabilites */ 2773 + 2 + IEEE80211_RATE_SIZE 2774 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2775 + 2 + IEEE80211_MESHID_LEN 2776 + sizeof(struct ieee80211_meshconf_ie) 2777 + sizeof(struct ieee80211_meshpeer_ie) 2778 ); 2779 if (m != NULL) { 2780 /* 2781 * mesh peer open action frame format: 2782 * [1] category 2783 * [1] action 2784 * [2] capabilities 2785 * [tlv] rates 2786 * [tlv] xrates 2787 * [tlv] mesh id 2788 * [tlv] mesh conf 2789 * [tlv] mesh peer link mgmt 2790 */ 2791 *frm++ = category; 2792 *frm++ = action; 2793 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2794 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2795 frm = ieee80211_add_rates(frm, rs); 2796 frm = ieee80211_add_xrates(frm, rs); 2797 frm = ieee80211_add_meshid(frm, vap); 2798 frm = ieee80211_add_meshconf(frm, vap); 2799 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2800 args[0], 0, 0); 2801 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2802 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2803 } else { 2804 vap->iv_stats.is_tx_nobuf++; 2805 ieee80211_free_node(ni); 2806 return ENOMEM; 2807 } 2808 } 2809 2810 static int 2811 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2812 int category, int action, void *args0) 2813 { 2814 struct ieee80211vap *vap = ni->ni_vap; 2815 struct ieee80211com *ic = ni->ni_ic; 2816 uint16_t *args = args0; 2817 const struct ieee80211_rateset *rs; 2818 struct mbuf *m; 2819 uint8_t *frm; 2820 2821 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2822 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2823 args[0], args[1]); 2824 2825 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2826 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2827 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2828 ieee80211_ref_node(ni); 2829 2830 m = ieee80211_getmgtframe(&frm, 2831 ic->ic_headroom + sizeof(struct ieee80211_frame), 2832 sizeof(uint16_t) /* action+category */ 2833 + sizeof(uint16_t) /* capabilites */ 2834 + sizeof(uint16_t) /* status code */ 2835 + sizeof(uint16_t) /* AID */ 2836 + 2 + IEEE80211_RATE_SIZE 2837 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2838 + 2 + IEEE80211_MESHID_LEN 2839 + sizeof(struct ieee80211_meshconf_ie) 2840 + sizeof(struct ieee80211_meshpeer_ie) 2841 ); 2842 if (m != NULL) { 2843 /* 2844 * mesh peer confirm action frame format: 2845 * [1] category 2846 * [1] action 2847 * [2] capabilities 2848 * [2] status code 2849 * [2] association id (peer ID) 2850 * [tlv] rates 2851 * [tlv] xrates 2852 * [tlv] mesh id 2853 * [tlv] mesh conf 2854 * [tlv] mesh peer link mgmt 2855 */ 2856 *frm++ = category; 2857 *frm++ = action; 2858 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2859 ADDSHORT(frm, 0); /* status code */ 2860 ADDSHORT(frm, args[1]); /* AID */ 2861 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2862 frm = ieee80211_add_rates(frm, rs); 2863 frm = ieee80211_add_xrates(frm, rs); 2864 frm = ieee80211_add_meshid(frm, vap); 2865 frm = ieee80211_add_meshconf(frm, vap); 2866 frm = ieee80211_add_meshpeer(frm, 2867 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2868 args[0], args[1], 0); 2869 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2870 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2871 } else { 2872 vap->iv_stats.is_tx_nobuf++; 2873 ieee80211_free_node(ni); 2874 return ENOMEM; 2875 } 2876 } 2877 2878 static int 2879 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2880 int category, int action, void *args0) 2881 { 2882 struct ieee80211vap *vap = ni->ni_vap; 2883 struct ieee80211com *ic = ni->ni_ic; 2884 uint16_t *args = args0; 2885 struct mbuf *m; 2886 uint8_t *frm; 2887 2888 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2889 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2890 args[0], args[1], args[2]); 2891 2892 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2893 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2894 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2895 ieee80211_ref_node(ni); 2896 2897 m = ieee80211_getmgtframe(&frm, 2898 ic->ic_headroom + sizeof(struct ieee80211_frame), 2899 sizeof(uint16_t) /* action+category */ 2900 + sizeof(uint16_t) /* reason code */ 2901 + 2 + IEEE80211_MESHID_LEN 2902 + sizeof(struct ieee80211_meshpeer_ie) 2903 ); 2904 if (m != NULL) { 2905 /* 2906 * mesh peer close action frame format: 2907 * [1] category 2908 * [1] action 2909 * [tlv] mesh id 2910 * [tlv] mesh peer link mgmt 2911 */ 2912 *frm++ = category; 2913 *frm++ = action; 2914 frm = ieee80211_add_meshid(frm, vap); 2915 frm = ieee80211_add_meshpeer(frm, 2916 IEEE80211_ACTION_MESHPEERING_CLOSE, 2917 args[0], args[1], args[2]); 2918 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2919 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2920 } else { 2921 vap->iv_stats.is_tx_nobuf++; 2922 ieee80211_free_node(ni); 2923 return ENOMEM; 2924 } 2925 } 2926 2927 static int 2928 mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2929 int category, int action, void *arg0) 2930 { 2931 struct ieee80211vap *vap = ni->ni_vap; 2932 struct ieee80211com *ic = ni->ni_ic; 2933 struct ieee80211_meshlmetric_ie *ie = arg0; 2934 struct mbuf *m; 2935 uint8_t *frm; 2936 2937 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2938 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2939 ni, "%s", "send LINK METRIC REQUEST action"); 2940 } else { 2941 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2942 ni, "send LINK METRIC REPLY action: metric 0x%x", 2943 ie->lm_metric); 2944 } 2945 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2946 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2947 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2948 ieee80211_ref_node(ni); 2949 2950 m = ieee80211_getmgtframe(&frm, 2951 ic->ic_headroom + sizeof(struct ieee80211_frame), 2952 sizeof(uint16_t) + /* action+category */ 2953 sizeof(struct ieee80211_meshlmetric_ie) 2954 ); 2955 if (m != NULL) { 2956 /* 2957 * mesh link metric 2958 * [1] category 2959 * [1] action 2960 * [tlv] mesh link metric 2961 */ 2962 *frm++ = category; 2963 *frm++ = action; 2964 frm = ieee80211_add_meshlmetric(frm, 2965 ie->lm_flags, ie->lm_metric); 2966 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2967 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2968 } else { 2969 vap->iv_stats.is_tx_nobuf++; 2970 ieee80211_free_node(ni); 2971 return ENOMEM; 2972 } 2973 } 2974 2975 static int 2976 mesh_send_action_meshgate(struct ieee80211_node *ni, 2977 int category, int action, void *arg0) 2978 { 2979 struct ieee80211vap *vap = ni->ni_vap; 2980 struct ieee80211com *ic = ni->ni_ic; 2981 struct ieee80211_meshgann_ie *ie = arg0; 2982 struct mbuf *m; 2983 uint8_t *frm; 2984 2985 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2986 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2987 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2988 ieee80211_ref_node(ni); 2989 2990 m = ieee80211_getmgtframe(&frm, 2991 ic->ic_headroom + sizeof(struct ieee80211_frame), 2992 sizeof(uint16_t) + /* action+category */ 2993 IEEE80211_MESHGANN_BASE_SZ 2994 ); 2995 if (m != NULL) { 2996 /* 2997 * mesh link metric 2998 * [1] category 2999 * [1] action 3000 * [tlv] mesh gate annoucement 3001 */ 3002 *frm++ = category; 3003 *frm++ = action; 3004 frm = ieee80211_add_meshgate(frm, ie); 3005 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3006 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 3007 } else { 3008 vap->iv_stats.is_tx_nobuf++; 3009 ieee80211_free_node(ni); 3010 return ENOMEM; 3011 } 3012 } 3013 3014 static void 3015 mesh_peer_timeout_setup(struct ieee80211_node *ni) 3016 { 3017 switch (ni->ni_mlstate) { 3018 case IEEE80211_NODE_MESH_HOLDING: 3019 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 3020 break; 3021 case IEEE80211_NODE_MESH_CONFIRMRCV: 3022 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 3023 break; 3024 case IEEE80211_NODE_MESH_IDLE: 3025 ni->ni_mltval = 0; 3026 break; 3027 default: 3028 ni->ni_mltval = ieee80211_mesh_retrytimeout; 3029 break; 3030 } 3031 if (ni->ni_mltval) 3032 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 3033 mesh_peer_timeout_cb, ni); 3034 } 3035 3036 /* 3037 * Same as above but backoffs timer statisically 50%. 3038 */ 3039 static void 3040 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3041 { 3042 uint32_t r; 3043 3044 r = arc4random(); 3045 ni->ni_mltval += r % ni->ni_mltval; 3046 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3047 ni); 3048 } 3049 3050 static __inline void 3051 mesh_peer_timeout_stop(struct ieee80211_node *ni) 3052 { 3053 callout_drain(&ni->ni_mltimer); 3054 } 3055 3056 static void 3057 mesh_peer_backoff_cb(void *arg) 3058 { 3059 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3060 3061 /* After backoff timeout, try to peer automatically again. */ 3062 ni->ni_mlhcnt = 0; 3063 } 3064 3065 /* 3066 * Mesh Peer Link Management FSM timeout handling. 3067 */ 3068 static void 3069 mesh_peer_timeout_cb(void *arg) 3070 { 3071 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3072 uint16_t args[3]; 3073 3074 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3075 ni, "mesh link timeout, state %d, retry counter %d", 3076 ni->ni_mlstate, ni->ni_mlrcnt); 3077 3078 switch (ni->ni_mlstate) { 3079 case IEEE80211_NODE_MESH_IDLE: 3080 case IEEE80211_NODE_MESH_ESTABLISHED: 3081 break; 3082 case IEEE80211_NODE_MESH_OPENSNT: 3083 case IEEE80211_NODE_MESH_OPENRCV: 3084 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3085 args[0] = ni->ni_mlpid; 3086 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3087 ieee80211_send_action(ni, 3088 IEEE80211_ACTION_CAT_SELF_PROT, 3089 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3090 ni->ni_mlrcnt = 0; 3091 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3092 mesh_peer_timeout_setup(ni); 3093 } else { 3094 args[0] = ni->ni_mlpid; 3095 ieee80211_send_action(ni, 3096 IEEE80211_ACTION_CAT_SELF_PROT, 3097 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3098 ni->ni_mlrcnt++; 3099 mesh_peer_timeout_backoff(ni); 3100 } 3101 break; 3102 case IEEE80211_NODE_MESH_CONFIRMRCV: 3103 args[0] = ni->ni_mlpid; 3104 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3105 ieee80211_send_action(ni, 3106 IEEE80211_ACTION_CAT_SELF_PROT, 3107 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3108 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3109 mesh_peer_timeout_setup(ni); 3110 break; 3111 case IEEE80211_NODE_MESH_HOLDING: 3112 ni->ni_mlhcnt++; 3113 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3114 callout_reset(&ni->ni_mlhtimer, 3115 ieee80211_mesh_backofftimeout, 3116 mesh_peer_backoff_cb, ni); 3117 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3118 break; 3119 } 3120 } 3121 3122 static int 3123 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3124 { 3125 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3126 3127 if (ie == NULL || ie[1] != ms->ms_idlen) 3128 return 1; 3129 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3130 } 3131 3132 /* 3133 * Check if we are using the same algorithms for this mesh. 3134 */ 3135 static int 3136 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3137 { 3138 const struct ieee80211_meshconf_ie *meshconf = 3139 (const struct ieee80211_meshconf_ie *) ie; 3140 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3141 3142 if (meshconf == NULL) 3143 return 1; 3144 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3145 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3146 "unknown path selection algorithm: 0x%x\n", 3147 meshconf->conf_pselid); 3148 return 1; 3149 } 3150 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3151 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3152 "unknown path metric algorithm: 0x%x\n", 3153 meshconf->conf_pmetid); 3154 return 1; 3155 } 3156 if (meshconf->conf_ccid != 0) { 3157 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3158 "unknown congestion control algorithm: 0x%x\n", 3159 meshconf->conf_ccid); 3160 return 1; 3161 } 3162 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3163 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3164 "unknown sync algorithm: 0x%x\n", 3165 meshconf->conf_syncid); 3166 return 1; 3167 } 3168 if (meshconf->conf_authid != 0) { 3169 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3170 "unknown auth auth algorithm: 0x%x\n", 3171 meshconf->conf_pselid); 3172 return 1; 3173 } 3174 /* Not accepting peers */ 3175 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3176 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3177 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3178 return 1; 3179 } 3180 return 0; 3181 } 3182 3183 static int 3184 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3185 const uint8_t *ie) 3186 { 3187 const struct ieee80211_meshpeer_ie *meshpeer = 3188 (const struct ieee80211_meshpeer_ie *) ie; 3189 3190 if (meshpeer == NULL || 3191 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3192 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3193 return 1; 3194 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3195 IEEE80211_DPRINTF(vap, 3196 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3197 "Only MPM protocol is supported (proto: 0x%02X)", 3198 meshpeer->peer_proto); 3199 return 1; 3200 } 3201 switch (subtype) { 3202 case IEEE80211_ACTION_MESHPEERING_OPEN: 3203 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3204 return 1; 3205 break; 3206 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3207 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3208 return 1; 3209 break; 3210 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3211 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3212 return 1; 3213 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3214 meshpeer->peer_linkid != 0) 3215 return 1; 3216 if (meshpeer->peer_rcode == 0) 3217 return 1; 3218 break; 3219 } 3220 return 0; 3221 } 3222 3223 /* 3224 * Add a Mesh ID IE to a frame. 3225 */ 3226 uint8_t * 3227 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3228 { 3229 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3230 3231 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3232 3233 *frm++ = IEEE80211_ELEMID_MESHID; 3234 *frm++ = ms->ms_idlen; 3235 memcpy(frm, ms->ms_id, ms->ms_idlen); 3236 return frm + ms->ms_idlen; 3237 } 3238 3239 /* 3240 * Add a Mesh Configuration IE to a frame. 3241 * For now just use HWMP routing, Airtime link metric, Null Congestion 3242 * Signaling, Null Sync Protocol and Null Authentication. 3243 */ 3244 uint8_t * 3245 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3246 { 3247 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3248 uint16_t caps; 3249 3250 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3251 3252 *frm++ = IEEE80211_ELEMID_MESHCONF; 3253 *frm++ = IEEE80211_MESH_CONF_SZ; 3254 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3255 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3256 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3257 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3258 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3259 /* NB: set the number of neighbors before the rest */ 3260 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3261 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3262 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3263 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3264 frm += 1; 3265 caps = 0; 3266 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3267 caps |= IEEE80211_MESHCONF_CAP_AP; 3268 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3269 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3270 *frm++ = caps; 3271 return frm; 3272 } 3273 3274 /* 3275 * Add a Mesh Peer Management IE to a frame. 3276 */ 3277 uint8_t * 3278 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3279 uint16_t peerid, uint16_t reason) 3280 { 3281 3282 KASSERT(localid != 0, ("localid == 0")); 3283 3284 *frm++ = IEEE80211_ELEMID_MESHPEER; 3285 switch (subtype) { 3286 case IEEE80211_ACTION_MESHPEERING_OPEN: 3287 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3288 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3289 ADDSHORT(frm, localid); /* local ID */ 3290 break; 3291 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3292 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3293 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3294 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3295 ADDSHORT(frm, localid); /* local ID */ 3296 ADDSHORT(frm, peerid); /* peer ID */ 3297 break; 3298 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3299 if (peerid) 3300 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3301 else 3302 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3303 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3304 ADDSHORT(frm, localid); /* local ID */ 3305 if (peerid) 3306 ADDSHORT(frm, peerid); /* peer ID */ 3307 ADDSHORT(frm, reason); 3308 break; 3309 } 3310 return frm; 3311 } 3312 3313 /* 3314 * Compute an Airtime Link Metric for the link with this node. 3315 * 3316 * Based on Draft 3.0 spec (11B.10, p.149). 3317 */ 3318 /* 3319 * Max 802.11s overhead. 3320 */ 3321 #define IEEE80211_MESH_MAXOVERHEAD \ 3322 (sizeof(struct ieee80211_qosframe_addr4) \ 3323 + sizeof(struct ieee80211_meshcntl_ae10) \ 3324 + sizeof(struct llc) \ 3325 + IEEE80211_ADDR_LEN \ 3326 + IEEE80211_WEP_IVLEN \ 3327 + IEEE80211_WEP_KIDLEN \ 3328 + IEEE80211_WEP_CRCLEN \ 3329 + IEEE80211_WEP_MICLEN \ 3330 + IEEE80211_CRC_LEN) 3331 uint32_t 3332 mesh_airtime_calc(struct ieee80211_node *ni) 3333 { 3334 #define M_BITS 8 3335 #define S_FACTOR (2 * M_BITS) 3336 struct ieee80211com *ic = ni->ni_ic; 3337 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3338 const static int nbits = 8192 << M_BITS; 3339 uint32_t overhead, rate, errrate; 3340 uint64_t res; 3341 3342 /* Time to transmit a frame */ 3343 rate = ni->ni_txrate; 3344 overhead = ieee80211_compute_duration(ic->ic_rt, 3345 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3346 /* Error rate in percentage */ 3347 /* XXX assuming small failures are ok */ 3348 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + 3349 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) 3350 / 100; 3351 res = (overhead + (nbits / rate)) * 3352 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3353 3354 return (uint32_t)(res >> S_FACTOR); 3355 #undef M_BITS 3356 #undef S_FACTOR 3357 } 3358 3359 /* 3360 * Add a Mesh Link Metric report IE to a frame. 3361 */ 3362 uint8_t * 3363 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3364 { 3365 *frm++ = IEEE80211_ELEMID_MESHLINK; 3366 *frm++ = 5; 3367 *frm++ = flags; 3368 ADDWORD(frm, metric); 3369 return frm; 3370 } 3371 3372 /* 3373 * Add a Mesh Gate Announcement IE to a frame. 3374 */ 3375 uint8_t * 3376 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3377 { 3378 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3379 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3380 *frm++ = ie->gann_flags; 3381 *frm++ = ie->gann_hopcount; 3382 *frm++ = ie->gann_ttl; 3383 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3384 frm += 6; 3385 ADDWORD(frm, ie->gann_seq); 3386 ADDSHORT(frm, ie->gann_interval); 3387 return frm; 3388 } 3389 #undef ADDSHORT 3390 #undef ADDWORD 3391 3392 /* 3393 * Initialize any mesh-specific node state. 3394 */ 3395 void 3396 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3397 { 3398 ni->ni_flags |= IEEE80211_NODE_QOS; 3399 callout_init(&ni->ni_mltimer, 1); 3400 callout_init(&ni->ni_mlhtimer, 1); 3401 } 3402 3403 /* 3404 * Cleanup any mesh-specific node state. 3405 */ 3406 void 3407 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3408 { 3409 struct ieee80211vap *vap = ni->ni_vap; 3410 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3411 3412 callout_drain(&ni->ni_mltimer); 3413 callout_drain(&ni->ni_mlhtimer); 3414 /* NB: short-circuit callbacks after mesh_vdetach */ 3415 if (vap->iv_mesh != NULL) 3416 ms->ms_ppath->mpp_peerdown(ni); 3417 } 3418 3419 void 3420 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3421 { 3422 ni->ni_meshidlen = ie[1]; 3423 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3424 } 3425 3426 /* 3427 * Setup mesh-specific node state on neighbor discovery. 3428 */ 3429 void 3430 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3431 const struct ieee80211_frame *wh, 3432 const struct ieee80211_scanparams *sp) 3433 { 3434 ieee80211_parse_meshid(ni, sp->meshid); 3435 } 3436 3437 void 3438 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3439 struct ieee80211_beacon_offsets *bo) 3440 { 3441 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3442 3443 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3444 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3445 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3446 } 3447 } 3448 3449 static int 3450 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3451 { 3452 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3453 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3454 struct ieee80211_mesh_route *rt; 3455 struct ieee80211req_mesh_route *imr; 3456 size_t len, off; 3457 uint8_t *p; 3458 int error; 3459 3460 if (vap->iv_opmode != IEEE80211_M_MBSS) 3461 return ENOSYS; 3462 3463 error = 0; 3464 switch (ireq->i_type) { 3465 case IEEE80211_IOC_MESH_ID: 3466 ireq->i_len = ms->ms_idlen; 3467 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3468 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3469 break; 3470 case IEEE80211_IOC_MESH_AP: 3471 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3472 break; 3473 case IEEE80211_IOC_MESH_FWRD: 3474 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3475 break; 3476 case IEEE80211_IOC_MESH_GATE: 3477 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3478 break; 3479 case IEEE80211_IOC_MESH_TTL: 3480 ireq->i_val = ms->ms_ttl; 3481 break; 3482 case IEEE80211_IOC_MESH_RTCMD: 3483 switch (ireq->i_val) { 3484 case IEEE80211_MESH_RTCMD_LIST: 3485 len = 0; 3486 MESH_RT_LOCK(ms); 3487 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3488 len += sizeof(*imr); 3489 } 3490 MESH_RT_UNLOCK(ms); 3491 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3492 ireq->i_len = len; 3493 return ENOMEM; 3494 } 3495 ireq->i_len = len; 3496 /* XXX M_WAIT? */ 3497 p = IEEE80211_MALLOC(len, M_TEMP, 3498 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 3499 if (p == NULL) 3500 return ENOMEM; 3501 off = 0; 3502 MESH_RT_LOCK(ms); 3503 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3504 if (off >= len) 3505 break; 3506 imr = (struct ieee80211req_mesh_route *) 3507 (p + off); 3508 IEEE80211_ADDR_COPY(imr->imr_dest, 3509 rt->rt_dest); 3510 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3511 rt->rt_nexthop); 3512 imr->imr_metric = rt->rt_metric; 3513 imr->imr_nhops = rt->rt_nhops; 3514 imr->imr_lifetime = 3515 ieee80211_mesh_rt_update(rt, 0); 3516 imr->imr_lastmseq = rt->rt_lastmseq; 3517 imr->imr_flags = rt->rt_flags; /* last */ 3518 off += sizeof(*imr); 3519 } 3520 MESH_RT_UNLOCK(ms); 3521 error = copyout(p, (uint8_t *)ireq->i_data, 3522 ireq->i_len); 3523 IEEE80211_FREE(p, M_TEMP); 3524 break; 3525 case IEEE80211_MESH_RTCMD_FLUSH: 3526 case IEEE80211_MESH_RTCMD_ADD: 3527 case IEEE80211_MESH_RTCMD_DELETE: 3528 return EINVAL; 3529 default: 3530 return ENOSYS; 3531 } 3532 break; 3533 case IEEE80211_IOC_MESH_PR_METRIC: 3534 len = strlen(ms->ms_pmetric->mpm_descr); 3535 if (ireq->i_len < len) 3536 return EINVAL; 3537 ireq->i_len = len; 3538 error = copyout(ms->ms_pmetric->mpm_descr, 3539 (uint8_t *)ireq->i_data, len); 3540 break; 3541 case IEEE80211_IOC_MESH_PR_PATH: 3542 len = strlen(ms->ms_ppath->mpp_descr); 3543 if (ireq->i_len < len) 3544 return EINVAL; 3545 ireq->i_len = len; 3546 error = copyout(ms->ms_ppath->mpp_descr, 3547 (uint8_t *)ireq->i_data, len); 3548 break; 3549 default: 3550 return ENOSYS; 3551 } 3552 3553 return error; 3554 } 3555 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3556 3557 static int 3558 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3559 { 3560 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3561 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3562 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3563 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3564 int error; 3565 3566 if (vap->iv_opmode != IEEE80211_M_MBSS) 3567 return ENOSYS; 3568 3569 error = 0; 3570 switch (ireq->i_type) { 3571 case IEEE80211_IOC_MESH_ID: 3572 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3573 return EINVAL; 3574 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3575 if (error != 0) 3576 break; 3577 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3578 ms->ms_idlen = ireq->i_len; 3579 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3580 error = ENETRESET; 3581 break; 3582 case IEEE80211_IOC_MESH_AP: 3583 if (ireq->i_val) 3584 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3585 else 3586 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3587 error = ENETRESET; 3588 break; 3589 case IEEE80211_IOC_MESH_FWRD: 3590 if (ireq->i_val) 3591 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3592 else 3593 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3594 mesh_gatemode_setup(vap); 3595 break; 3596 case IEEE80211_IOC_MESH_GATE: 3597 if (ireq->i_val) 3598 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3599 else 3600 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3601 break; 3602 case IEEE80211_IOC_MESH_TTL: 3603 ms->ms_ttl = (uint8_t) ireq->i_val; 3604 break; 3605 case IEEE80211_IOC_MESH_RTCMD: 3606 switch (ireq->i_val) { 3607 case IEEE80211_MESH_RTCMD_LIST: 3608 return EINVAL; 3609 case IEEE80211_MESH_RTCMD_FLUSH: 3610 ieee80211_mesh_rt_flush(vap); 3611 break; 3612 case IEEE80211_MESH_RTCMD_ADD: 3613 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3614 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3615 return EINVAL; 3616 error = copyin(ireq->i_data, &tmpaddr, 3617 IEEE80211_ADDR_LEN); 3618 if (error == 0) 3619 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3620 break; 3621 case IEEE80211_MESH_RTCMD_DELETE: 3622 ieee80211_mesh_rt_del(vap, ireq->i_data); 3623 break; 3624 default: 3625 return ENOSYS; 3626 } 3627 break; 3628 case IEEE80211_IOC_MESH_PR_METRIC: 3629 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3630 if (error == 0) { 3631 error = mesh_select_proto_metric(vap, tmpproto); 3632 if (error == 0) 3633 error = ENETRESET; 3634 } 3635 break; 3636 case IEEE80211_IOC_MESH_PR_PATH: 3637 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3638 if (error == 0) { 3639 error = mesh_select_proto_path(vap, tmpproto); 3640 if (error == 0) 3641 error = ENETRESET; 3642 } 3643 break; 3644 default: 3645 return ENOSYS; 3646 } 3647 return error; 3648 } 3649 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3650