ieee80211_mesh.c revision 234879
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: head/sys/net80211/ieee80211_mesh.c 234879 2012-05-01 15:58:10Z monthadar $"); 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/if.h> 56#include <net/if_media.h> 57#include <net/if_llc.h> 58#include <net/ethernet.h> 59 60#include <net80211/ieee80211_var.h> 61#include <net80211/ieee80211_action.h> 62#include <net80211/ieee80211_input.h> 63#include <net80211/ieee80211_mesh.h> 64 65static void mesh_rt_flush_invalid(struct ieee80211vap *); 66static int mesh_select_proto_path(struct ieee80211vap *, const char *); 67static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 68static void mesh_vattach(struct ieee80211vap *); 69static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 70static void mesh_rt_cleanup_cb(void *); 71static void mesh_linkchange(struct ieee80211_node *, 72 enum ieee80211_mesh_mlstate); 73static void mesh_checkid(void *, struct ieee80211_node *); 74static uint32_t mesh_generateid(struct ieee80211vap *); 75static int mesh_checkpseq(struct ieee80211vap *, 76 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 77static struct ieee80211_node * 78 mesh_find_txnode(struct ieee80211vap *, 79 const uint8_t [IEEE80211_ADDR_LEN]); 80static void mesh_forward(struct ieee80211vap *, struct mbuf *, 81 const struct ieee80211_meshcntl *); 82static int mesh_input(struct ieee80211_node *, struct mbuf *, int, int); 83static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 84 int, int); 85static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 86static void mesh_peer_timeout_setup(struct ieee80211_node *); 87static void mesh_peer_timeout_backoff(struct ieee80211_node *); 88static void mesh_peer_timeout_cb(void *); 89static __inline void 90 mesh_peer_timeout_stop(struct ieee80211_node *); 91static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 92static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 93static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 94 const uint8_t *); 95uint32_t mesh_airtime_calc(struct ieee80211_node *); 96 97/* 98 * Timeout values come from the specification and are in milliseconds. 99 */ 100static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 101 "IEEE 802.11s parameters"); 102static int ieee80211_mesh_retrytimeout = -1; 103SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, 104 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 105 "Retry timeout (msec)"); 106static int ieee80211_mesh_holdingtimeout = -1; 107SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, 108 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 109 "Holding state timeout (msec)"); 110static int ieee80211_mesh_confirmtimeout = -1; 111SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, 112 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 113 "Confirm state timeout (msec)"); 114static int ieee80211_mesh_maxretries = 2; 115SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW, 116 &ieee80211_mesh_maxretries, 0, 117 "Maximum retries during peer link establishment"); 118 119static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 120 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 121 122static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 123static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 124static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 125static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 126 127static ieee80211_send_action_func mesh_send_action_meshpeering_open; 128static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 129static ieee80211_send_action_func mesh_send_action_meshpeering_close; 130static ieee80211_send_action_func mesh_send_action_meshlmetric; 131 132static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 133 .mpm_descr = "AIRTIME", 134 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 135 .mpm_metric = mesh_airtime_calc, 136}; 137 138static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 139static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 140 141#define RT_ENTRY_LOCK(rt) mtx_lock(&(rt)->rt_lock) 142#define RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED) 143#define RT_ENTRY_UNLOCK(rt) mtx_unlock(&(rt)->rt_lock) 144 145#define MESH_RT_LOCK(ms) mtx_lock(&(ms)->ms_rt_lock) 146#define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED) 147#define MESH_RT_UNLOCK(ms) mtx_unlock(&(ms)->ms_rt_lock) 148 149MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 150MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 151MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 152 153/* The longer one of the lifetime should be stored as new lifetime */ 154#define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 155 156MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh", "802.11s routing table"); 157 158/* 159 * Helper functions to manipulate the Mesh routing table. 160 */ 161 162static struct ieee80211_mesh_route * 163mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 164 const uint8_t dest[IEEE80211_ADDR_LEN]) 165{ 166 struct ieee80211_mesh_route *rt; 167 168 MESH_RT_LOCK_ASSERT(ms); 169 170 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 171 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 172 return rt; 173 } 174 return NULL; 175} 176 177static struct ieee80211_mesh_route * 178mesh_rt_add_locked(struct ieee80211_mesh_state *ms, 179 const uint8_t dest[IEEE80211_ADDR_LEN]) 180{ 181 struct ieee80211_mesh_route *rt; 182 183 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 184 ("%s: adding broadcast to the routing table", __func__)); 185 186 MESH_RT_LOCK_ASSERT(ms); 187 188 rt = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) + 189 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | M_ZERO); 190 if (rt != NULL) { 191 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 192 rt->rt_priv = (void *)ALIGN(&rt[1]); 193 mtx_init(&rt->rt_lock, "MBSS_RT", "802.11s route entry", MTX_DEF); 194 rt->rt_updtime = ticks; /* create time */ 195 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 196 } 197 return rt; 198} 199 200struct ieee80211_mesh_route * 201ieee80211_mesh_rt_find(struct ieee80211vap *vap, 202 const uint8_t dest[IEEE80211_ADDR_LEN]) 203{ 204 struct ieee80211_mesh_state *ms = vap->iv_mesh; 205 struct ieee80211_mesh_route *rt; 206 207 MESH_RT_LOCK(ms); 208 rt = mesh_rt_find_locked(ms, dest); 209 MESH_RT_UNLOCK(ms); 210 return rt; 211} 212 213struct ieee80211_mesh_route * 214ieee80211_mesh_rt_add(struct ieee80211vap *vap, 215 const uint8_t dest[IEEE80211_ADDR_LEN]) 216{ 217 struct ieee80211_mesh_state *ms = vap->iv_mesh; 218 struct ieee80211_mesh_route *rt; 219 220 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 221 ("%s: duplicate entry in the routing table", __func__)); 222 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 223 ("%s: adding self to the routing table", __func__)); 224 225 MESH_RT_LOCK(ms); 226 rt = mesh_rt_add_locked(ms, dest); 227 MESH_RT_UNLOCK(ms); 228 return rt; 229} 230 231/* 232 * Update the route lifetime and returns the updated lifetime. 233 * If new_lifetime is zero and route is timedout it will be invalidated. 234 * new_lifetime is in msec 235 */ 236int 237ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 238{ 239 int timesince, now; 240 uint32_t lifetime = 0; 241 242 now = ticks; 243 RT_ENTRY_LOCK(rt); 244 245 /* dont clobber a proxy entry gated by us */ 246 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 247 RT_ENTRY_UNLOCK(rt); 248 return rt->rt_lifetime; 249 } 250 251 timesince = ticks_to_msecs(now - rt->rt_updtime); 252 rt->rt_updtime = now; 253 if (timesince >= rt->rt_lifetime) { 254 if (new_lifetime != 0) { 255 rt->rt_lifetime = new_lifetime; 256 } 257 else { 258 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 259 rt->rt_lifetime = 0; 260 } 261 } else { 262 /* update what is left of lifetime */ 263 rt->rt_lifetime = rt->rt_lifetime - timesince; 264 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 265 new_lifetime, rt->rt_lifetime); 266 } 267 lifetime = rt->rt_lifetime; 268 RT_ENTRY_UNLOCK(rt); 269 270 return lifetime; 271} 272 273/* 274 * Add a proxy route (as needed) for the specified destination. 275 */ 276void 277ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 278 const uint8_t dest[IEEE80211_ADDR_LEN]) 279{ 280 struct ieee80211_mesh_state *ms = vap->iv_mesh; 281 struct ieee80211_mesh_route *rt; 282 283 MESH_RT_LOCK(ms); 284 rt = mesh_rt_find_locked(ms, dest); 285 if (rt == NULL) { 286 rt = mesh_rt_add_locked(ms, dest); 287 if (rt == NULL) { 288 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 289 "%s", "unable to add proxy entry"); 290 vap->iv_stats.is_mesh_rtaddfailed++; 291 } else { 292 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 293 "%s", "add proxy entry"); 294 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 295 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 296 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 297 | IEEE80211_MESHRT_FLAGS_PROXY; 298 } 299 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 300 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 301 ("no proxy flag for poxy entry")); 302 struct ieee80211com *ic = vap->iv_ic; 303 /* 304 * Fix existing entry created by received frames from 305 * stations that have some memory of dest. We also 306 * flush any frames held on the staging queue; delivering 307 * them is too much trouble right now. 308 */ 309 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 310 "%s", "fix proxy entry"); 311 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 312 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 313 | IEEE80211_MESHRT_FLAGS_PROXY; 314 /* XXX belongs in hwmp */ 315 ieee80211_ageq_drain_node(&ic->ic_stageq, 316 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 317 /* XXX stat? */ 318 } 319 MESH_RT_UNLOCK(ms); 320} 321 322static __inline void 323mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 324{ 325 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 326 /* 327 * Grab the lock before destroying it, to be sure no one else 328 * is holding the route. 329 */ 330 RT_ENTRY_LOCK(rt); 331 mtx_destroy(&rt->rt_lock); 332 free(rt, M_80211_MESH_RT); 333} 334 335void 336ieee80211_mesh_rt_del(struct ieee80211vap *vap, 337 const uint8_t dest[IEEE80211_ADDR_LEN]) 338{ 339 struct ieee80211_mesh_state *ms = vap->iv_mesh; 340 struct ieee80211_mesh_route *rt, *next; 341 342 MESH_RT_LOCK(ms); 343 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 344 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 345 mesh_rt_del(ms, rt); 346 MESH_RT_UNLOCK(ms); 347 return; 348 } 349 } 350 MESH_RT_UNLOCK(ms); 351} 352 353void 354ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 355{ 356 struct ieee80211_mesh_state *ms = vap->iv_mesh; 357 struct ieee80211_mesh_route *rt, *next; 358 359 if (ms == NULL) 360 return; 361 MESH_RT_LOCK(ms); 362 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 363 mesh_rt_del(ms, rt); 364 MESH_RT_UNLOCK(ms); 365} 366 367void 368ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 369 const uint8_t peer[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_nexthop, peer)) 377 mesh_rt_del(ms, rt); 378 } 379 MESH_RT_UNLOCK(ms); 380} 381 382/* 383 * Flush expired routing entries, i.e. those in invalid state for 384 * some time. 385 */ 386static void 387mesh_rt_flush_invalid(struct ieee80211vap *vap) 388{ 389 struct ieee80211_mesh_state *ms = vap->iv_mesh; 390 struct ieee80211_mesh_route *rt, *next; 391 392 if (ms == NULL) 393 return; 394 MESH_RT_LOCK(ms); 395 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 396 ieee80211_mesh_rt_update(rt, 0); 397 /* 398 * NB: we check for lifetime == 0 so that we give a chance 399 * for route discovery to complete. 400 */ 401 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 && 402 rt->rt_lifetime == 0) 403 mesh_rt_del(ms, rt); 404 } 405 MESH_RT_UNLOCK(ms); 406} 407 408#define N(a) (sizeof(a) / sizeof(a[0])) 409int 410ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 411{ 412 int i, firstempty = -1; 413 414 for (i = 0; i < N(mesh_proto_paths); i++) { 415 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 416 IEEE80211_MESH_PROTO_DSZ) == 0) 417 return EEXIST; 418 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 419 firstempty = i; 420 } 421 if (firstempty < 0) 422 return ENOSPC; 423 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 424 mesh_proto_paths[firstempty].mpp_active = 1; 425 return 0; 426} 427 428int 429ieee80211_mesh_register_proto_metric(const struct 430 ieee80211_mesh_proto_metric *mpm) 431{ 432 int i, firstempty = -1; 433 434 for (i = 0; i < N(mesh_proto_metrics); i++) { 435 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 436 IEEE80211_MESH_PROTO_DSZ) == 0) 437 return EEXIST; 438 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 439 firstempty = i; 440 } 441 if (firstempty < 0) 442 return ENOSPC; 443 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 444 mesh_proto_metrics[firstempty].mpm_active = 1; 445 return 0; 446} 447 448static int 449mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 450{ 451 struct ieee80211_mesh_state *ms = vap->iv_mesh; 452 int i; 453 454 for (i = 0; i < N(mesh_proto_paths); i++) { 455 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 456 ms->ms_ppath = &mesh_proto_paths[i]; 457 return 0; 458 } 459 } 460 return ENOENT; 461} 462 463static int 464mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 465{ 466 struct ieee80211_mesh_state *ms = vap->iv_mesh; 467 int i; 468 469 for (i = 0; i < N(mesh_proto_metrics); i++) { 470 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 471 ms->ms_pmetric = &mesh_proto_metrics[i]; 472 return 0; 473 } 474 } 475 return ENOENT; 476} 477#undef N 478 479static void 480ieee80211_mesh_init(void) 481{ 482 483 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 484 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 485 486 /* 487 * Setup mesh parameters that depends on the clock frequency. 488 */ 489 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 490 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 491 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 492 493 /* 494 * Register action frame handlers. 495 */ 496 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 497 IEEE80211_ACTION_MESHPEERING_OPEN, 498 mesh_recv_action_meshpeering_open); 499 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 500 IEEE80211_ACTION_MESHPEERING_CONFIRM, 501 mesh_recv_action_meshpeering_confirm); 502 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 503 IEEE80211_ACTION_MESHPEERING_CLOSE, 504 mesh_recv_action_meshpeering_close); 505 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 506 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 507 508 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 509 IEEE80211_ACTION_MESHPEERING_OPEN, 510 mesh_send_action_meshpeering_open); 511 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 512 IEEE80211_ACTION_MESHPEERING_CONFIRM, 513 mesh_send_action_meshpeering_confirm); 514 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 515 IEEE80211_ACTION_MESHPEERING_CLOSE, 516 mesh_send_action_meshpeering_close); 517 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 518 IEEE80211_ACTION_MESH_LMETRIC, 519 mesh_send_action_meshlmetric); 520 521 /* 522 * Register Airtime Link Metric. 523 */ 524 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 525 526} 527SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 528 529void 530ieee80211_mesh_attach(struct ieee80211com *ic) 531{ 532 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 533} 534 535void 536ieee80211_mesh_detach(struct ieee80211com *ic) 537{ 538} 539 540static void 541mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 542{ 543 struct ieee80211com *ic = ni->ni_ic; 544 uint16_t args[3]; 545 546 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 547 args[0] = ni->ni_mlpid; 548 args[1] = ni->ni_mllid; 549 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 550 ieee80211_send_action(ni, 551 IEEE80211_ACTION_CAT_SELF_PROT, 552 IEEE80211_ACTION_MESHPEERING_CLOSE, 553 args); 554 } 555 callout_drain(&ni->ni_mltimer); 556 /* XXX belongs in hwmp */ 557 ieee80211_ageq_drain_node(&ic->ic_stageq, 558 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 559} 560 561static void 562mesh_vdetach(struct ieee80211vap *vap) 563{ 564 struct ieee80211_mesh_state *ms = vap->iv_mesh; 565 566 callout_drain(&ms->ms_cleantimer); 567 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 568 NULL); 569 ieee80211_mesh_rt_flush(vap); 570 mtx_destroy(&ms->ms_rt_lock); 571 ms->ms_ppath->mpp_vdetach(vap); 572 free(vap->iv_mesh, M_80211_VAP); 573 vap->iv_mesh = NULL; 574} 575 576static void 577mesh_vattach(struct ieee80211vap *vap) 578{ 579 struct ieee80211_mesh_state *ms; 580 vap->iv_newstate = mesh_newstate; 581 vap->iv_input = mesh_input; 582 vap->iv_opdetach = mesh_vdetach; 583 vap->iv_recv_mgmt = mesh_recv_mgmt; 584 vap->iv_recv_ctl = mesh_recv_ctl; 585 ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 586 M_NOWAIT | M_ZERO); 587 if (ms == NULL) { 588 printf("%s: couldn't alloc MBSS state\n", __func__); 589 return; 590 } 591 vap->iv_mesh = ms; 592 ms->ms_seq = 0; 593 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 594 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 595 TAILQ_INIT(&ms->ms_routes); 596 mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF); 597 callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE); 598 mesh_select_proto_metric(vap, "AIRTIME"); 599 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 600 mesh_select_proto_path(vap, "HWMP"); 601 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 602 ms->ms_ppath->mpp_vattach(vap); 603} 604 605/* 606 * IEEE80211_M_MBSS vap state machine handler. 607 */ 608static int 609mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 610{ 611 struct ieee80211_mesh_state *ms = vap->iv_mesh; 612 struct ieee80211com *ic = vap->iv_ic; 613 struct ieee80211_node *ni; 614 enum ieee80211_state ostate; 615 616 IEEE80211_LOCK_ASSERT(ic); 617 618 ostate = vap->iv_state; 619 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 620 __func__, ieee80211_state_name[ostate], 621 ieee80211_state_name[nstate], arg); 622 vap->iv_state = nstate; /* state transition */ 623 if (ostate != IEEE80211_S_SCAN) 624 ieee80211_cancel_scan(vap); /* background scan */ 625 ni = vap->iv_bss; /* NB: no reference held */ 626 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) 627 callout_drain(&ms->ms_cleantimer); 628 switch (nstate) { 629 case IEEE80211_S_INIT: 630 switch (ostate) { 631 case IEEE80211_S_SCAN: 632 ieee80211_cancel_scan(vap); 633 break; 634 case IEEE80211_S_CAC: 635 ieee80211_dfs_cac_stop(vap); 636 break; 637 case IEEE80211_S_RUN: 638 ieee80211_iterate_nodes(&ic->ic_sta, 639 mesh_vdetach_peers, NULL); 640 break; 641 default: 642 break; 643 } 644 if (ostate != IEEE80211_S_INIT) { 645 /* NB: optimize INIT -> INIT case */ 646 ieee80211_reset_bss(vap); 647 ieee80211_mesh_rt_flush(vap); 648 } 649 break; 650 case IEEE80211_S_SCAN: 651 switch (ostate) { 652 case IEEE80211_S_INIT: 653 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 654 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 655 ms->ms_idlen != 0) { 656 /* 657 * Already have a channel and a mesh ID; bypass 658 * the scan and startup immediately. 659 */ 660 ieee80211_create_ibss(vap, vap->iv_des_chan); 661 break; 662 } 663 /* 664 * Initiate a scan. We can come here as a result 665 * of an IEEE80211_IOC_SCAN_REQ too in which case 666 * the vap will be marked with IEEE80211_FEXT_SCANREQ 667 * and the scan request parameters will be present 668 * in iv_scanreq. Otherwise we do the default. 669 */ 670 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 671 ieee80211_check_scan(vap, 672 vap->iv_scanreq_flags, 673 vap->iv_scanreq_duration, 674 vap->iv_scanreq_mindwell, 675 vap->iv_scanreq_maxdwell, 676 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 677 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 678 } else 679 ieee80211_check_scan_current(vap); 680 break; 681 default: 682 break; 683 } 684 break; 685 case IEEE80211_S_CAC: 686 /* 687 * Start CAC on a DFS channel. We come here when starting 688 * a bss on a DFS channel (see ieee80211_create_ibss). 689 */ 690 ieee80211_dfs_cac_start(vap); 691 break; 692 case IEEE80211_S_RUN: 693 switch (ostate) { 694 case IEEE80211_S_INIT: 695 /* 696 * Already have a channel; bypass the 697 * scan and startup immediately. 698 * Note that ieee80211_create_ibss will call 699 * back to do a RUN->RUN state change. 700 */ 701 ieee80211_create_ibss(vap, 702 ieee80211_ht_adjust_channel(ic, 703 ic->ic_curchan, vap->iv_flags_ht)); 704 /* NB: iv_bss is changed on return */ 705 break; 706 case IEEE80211_S_CAC: 707 /* 708 * NB: This is the normal state change when CAC 709 * expires and no radar was detected; no need to 710 * clear the CAC timer as it's already expired. 711 */ 712 /* fall thru... */ 713 case IEEE80211_S_CSA: 714#if 0 715 /* 716 * Shorten inactivity timer of associated stations 717 * to weed out sta's that don't follow a CSA. 718 */ 719 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 720#endif 721 /* 722 * Update bss node channel to reflect where 723 * we landed after CSA. 724 */ 725 ieee80211_node_set_chan(vap->iv_bss, 726 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 727 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 728 /* XXX bypass debug msgs */ 729 break; 730 case IEEE80211_S_SCAN: 731 case IEEE80211_S_RUN: 732#ifdef IEEE80211_DEBUG 733 if (ieee80211_msg_debug(vap)) { 734 struct ieee80211_node *ni = vap->iv_bss; 735 ieee80211_note(vap, 736 "synchronized with %s meshid ", 737 ether_sprintf(ni->ni_meshid)); 738 ieee80211_print_essid(ni->ni_meshid, 739 ni->ni_meshidlen); 740 /* XXX MCS/HT */ 741 printf(" channel %d\n", 742 ieee80211_chan2ieee(ic, ic->ic_curchan)); 743 } 744#endif 745 break; 746 default: 747 break; 748 } 749 ieee80211_node_authorize(vap->iv_bss); 750 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 751 mesh_rt_cleanup_cb, vap); 752 break; 753 default: 754 break; 755 } 756 /* NB: ostate not nstate */ 757 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 758 return 0; 759} 760 761static void 762mesh_rt_cleanup_cb(void *arg) 763{ 764 struct ieee80211vap *vap = arg; 765 struct ieee80211_mesh_state *ms = vap->iv_mesh; 766 767 mesh_rt_flush_invalid(vap); 768 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 769 mesh_rt_cleanup_cb, vap); 770} 771 772 773/* 774 * Helper function to note the Mesh Peer Link FSM change. 775 */ 776static void 777mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 778{ 779 struct ieee80211vap *vap = ni->ni_vap; 780 struct ieee80211_mesh_state *ms = vap->iv_mesh; 781#ifdef IEEE80211_DEBUG 782 static const char *meshlinkstates[] = { 783 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 784 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 785 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 786 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 787 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 788 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 789 }; 790#endif 791 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 792 ni, "peer link: %s -> %s", 793 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 794 795 /* track neighbor count */ 796 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 797 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 798 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 799 ms->ms_neighbors++; 800 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 801 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 802 state != IEEE80211_NODE_MESH_ESTABLISHED) { 803 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 804 ms->ms_neighbors--; 805 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 806 } 807 ni->ni_mlstate = state; 808 switch (state) { 809 case IEEE80211_NODE_MESH_HOLDING: 810 ms->ms_ppath->mpp_peerdown(ni); 811 break; 812 case IEEE80211_NODE_MESH_ESTABLISHED: 813 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 814 break; 815 default: 816 break; 817 } 818} 819 820/* 821 * Helper function to generate a unique local ID required for mesh 822 * peer establishment. 823 */ 824static void 825mesh_checkid(void *arg, struct ieee80211_node *ni) 826{ 827 uint16_t *r = arg; 828 829 if (*r == ni->ni_mllid) 830 *(uint16_t *)arg = 0; 831} 832 833static uint32_t 834mesh_generateid(struct ieee80211vap *vap) 835{ 836 int maxiter = 4; 837 uint16_t r; 838 839 do { 840 get_random_bytes(&r, 2); 841 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 842 maxiter--; 843 } while (r == 0 && maxiter > 0); 844 return r; 845} 846 847/* 848 * Verifies if we already received this packet by checking its 849 * sequence number. 850 * Returns 0 if the frame is to be accepted, 1 otherwise. 851 */ 852static int 853mesh_checkpseq(struct ieee80211vap *vap, 854 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 855{ 856 struct ieee80211_mesh_route *rt; 857 858 rt = ieee80211_mesh_rt_find(vap, source); 859 if (rt == NULL) { 860 rt = ieee80211_mesh_rt_add(vap, source); 861 if (rt == NULL) { 862 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 863 "%s", "add mcast route failed"); 864 vap->iv_stats.is_mesh_rtaddfailed++; 865 return 1; 866 } 867 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 868 "add mcast route, mesh seqno %d", seq); 869 rt->rt_lastmseq = seq; 870 return 0; 871 } 872 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 873 return 1; 874 } else { 875 rt->rt_lastmseq = seq; 876 return 0; 877 } 878} 879 880/* 881 * Iterate the routing table and locate the next hop. 882 */ 883static struct ieee80211_node * 884mesh_find_txnode(struct ieee80211vap *vap, 885 const uint8_t dest[IEEE80211_ADDR_LEN]) 886{ 887 struct ieee80211_mesh_route *rt; 888 889 rt = ieee80211_mesh_rt_find(vap, dest); 890 if (rt == NULL) 891 return NULL; 892 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 || 893 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) { 894 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 895 "%s: !valid or proxy, flags 0x%x", __func__, rt->rt_flags); 896 /* XXX stat */ 897 return NULL; 898 } 899 return ieee80211_find_txnode(vap, rt->rt_nexthop); 900} 901 902/* 903 * Forward the specified frame. 904 * Decrement the TTL and set TA to our MAC address. 905 */ 906static void 907mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 908 const struct ieee80211_meshcntl *mc) 909{ 910 struct ieee80211com *ic = vap->iv_ic; 911 struct ieee80211_mesh_state *ms = vap->iv_mesh; 912 struct ifnet *ifp = vap->iv_ifp; 913 struct ifnet *parent = ic->ic_ifp; 914 const struct ieee80211_frame *wh = 915 mtod(m, const struct ieee80211_frame *); 916 struct mbuf *mcopy; 917 struct ieee80211_meshcntl *mccopy; 918 struct ieee80211_frame *whcopy; 919 struct ieee80211_node *ni; 920 int err; 921 922 /* 923 * mesh ttl of 1 means we are the last one receving it, 924 * according to amendment we decrement and then check if 925 * 0, if so we dont forward. 926 */ 927 if (mc->mc_ttl < 1) { 928 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 929 "%s", "frame not fwd'd, ttl 1"); 930 vap->iv_stats.is_mesh_fwd_ttl++; 931 return; 932 } 933 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 934 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 935 "%s", "frame not fwd'd, fwding disabled"); 936 vap->iv_stats.is_mesh_fwd_disabled++; 937 return; 938 } 939 mcopy = m_dup(m, M_DONTWAIT); 940 if (mcopy == NULL) { 941 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 942 "%s", "frame not fwd'd, cannot dup"); 943 vap->iv_stats.is_mesh_fwd_nobuf++; 944 ifp->if_oerrors++; 945 return; 946 } 947 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 948 sizeof(struct ieee80211_meshcntl)); 949 if (mcopy == NULL) { 950 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 951 "%s", "frame not fwd'd, too short"); 952 vap->iv_stats.is_mesh_fwd_tooshort++; 953 ifp->if_oerrors++; 954 m_freem(mcopy); 955 return; 956 } 957 whcopy = mtod(mcopy, struct ieee80211_frame *); 958 mccopy = (struct ieee80211_meshcntl *) 959 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 960 /* XXX clear other bits? */ 961 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 962 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 963 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 964 ni = ieee80211_ref_node(vap->iv_bss); 965 mcopy->m_flags |= M_MCAST; 966 } else { 967 ni = mesh_find_txnode(vap, whcopy->i_addr3); 968 if (ni == NULL) { 969 /* 970 * [Optional] any of the following three actions: 971 * o silently discard 972 * o trigger a path discovery 973 * o inform TA that meshDA is unreachable. 974 */ 975 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 976 "%s", "frame not fwd'd, no path"); 977 vap->iv_stats.is_mesh_fwd_nopath++; 978 m_freem(mcopy); 979 return; 980 } 981 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 982 } 983 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 984 mccopy->mc_ttl--; 985 986 /* XXX calculate priority so drivers can find the tx queue */ 987 M_WME_SETAC(mcopy, WME_AC_BE); 988 989 /* XXX do we know m_nextpkt is NULL? */ 990 mcopy->m_pkthdr.rcvif = (void *) ni; 991 err = parent->if_transmit(parent, mcopy); 992 if (err != 0) { 993 /* NB: IFQ_HANDOFF reclaims mbuf */ 994 ieee80211_free_node(ni); 995 } else { 996 ifp->if_opackets++; 997 } 998} 999 1000static struct mbuf * 1001mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1002{ 1003#define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1004#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1005 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1006 sizeof(struct ieee80211_meshcntl_ae10)]; 1007 const struct ieee80211_qosframe_addr4 *wh; 1008 const struct ieee80211_meshcntl_ae10 *mc; 1009 struct ether_header *eh; 1010 struct llc *llc; 1011 int ae; 1012 1013 if (m->m_len < hdrlen + sizeof(*llc) && 1014 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1015 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1016 "discard data frame: %s", "m_pullup failed"); 1017 vap->iv_stats.is_rx_tooshort++; 1018 return NULL; 1019 } 1020 memcpy(b, mtod(m, caddr_t), hdrlen); 1021 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1022 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1023 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1024 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1025 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1026 1027 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1028 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1029 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1030 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1031 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1032 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1033 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1034 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1035 llc = NULL; 1036 } else { 1037 m_adj(m, hdrlen - sizeof(*eh)); 1038 } 1039 eh = mtod(m, struct ether_header *); 1040 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1041 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1042 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1043 if (ae == IEEE80211_MESH_AE_00) { 1044 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1045 } else if (ae == IEEE80211_MESH_AE_01) { 1046 IEEE80211_ADDR_COPY(eh->ether_shost, 1047 MC01(mc)->mc_addr4); 1048 } else { 1049 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1050 (const struct ieee80211_frame *)wh, NULL, 1051 "bad AE %d", ae); 1052 vap->iv_stats.is_mesh_badae++; 1053 m_freem(m); 1054 return NULL; 1055 } 1056 } else { 1057 if (ae == IEEE80211_MESH_AE_00) { 1058 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1059 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1060 } else if (ae == IEEE80211_MESH_AE_10) { 1061 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1062 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1063 } else { 1064 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1065 (const struct ieee80211_frame *)wh, NULL, 1066 "bad AE %d", ae); 1067 vap->iv_stats.is_mesh_badae++; 1068 m_freem(m); 1069 return NULL; 1070 } 1071 } 1072#ifdef ALIGNED_POINTER 1073 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1074 m = ieee80211_realign(vap, m, sizeof(*eh)); 1075 if (m == NULL) 1076 return NULL; 1077 } 1078#endif /* ALIGNED_POINTER */ 1079 if (llc != NULL) { 1080 eh = mtod(m, struct ether_header *); 1081 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1082 } 1083 return m; 1084#undef WDIR 1085#undef MC01 1086} 1087 1088/* 1089 * Return non-zero if the unicast mesh data frame should be processed 1090 * locally. Frames that are not proxy'd have our address, otherwise 1091 * we need to consult the routing table to look for a proxy entry. 1092 */ 1093static __inline int 1094mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1095 const struct ieee80211_meshcntl *mc) 1096{ 1097 int ae = mc->mc_flags & 3; 1098 1099 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1100 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1101 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1102 ("bad AE %d", ae)); 1103 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1104 const struct ieee80211_meshcntl_ae10 *mc10 = 1105 (const struct ieee80211_meshcntl_ae10 *) mc; 1106 struct ieee80211_mesh_route *rt = 1107 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1108 /* check for proxy route to ourself */ 1109 return (rt != NULL && 1110 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1111 } else /* ucast w/o proxy */ 1112 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1113} 1114 1115/* 1116 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1117 * > 0 means we have forwarded data and no need to process locally 1118 * == 0 means we want to process locally (and we may have forwarded data 1119 * < 0 means there was an error and data should be discarded 1120 */ 1121static int 1122mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1123 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1124{ 1125 struct ieee80211_qosframe_addr4 *qwh; 1126 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1127 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1128 1129 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1130 1131 /* 1132 * TODO: 1133 * o verify addr2 is a legitimate transmitter 1134 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1135 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1136 */ 1137 1138 /* set lifetime of addr3 (meshDA) to initial value */ 1139 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1140 KASSERT(rt_meshda != NULL, ("no route")); 1141 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1142 ms->ms_ppath->mpp_inact)); 1143 1144 /* set lifetime of addr4 (meshSA) to initial value */ 1145 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1146 KASSERT(rt_meshsa != NULL, ("no route")); 1147 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1148 ms->ms_ppath->mpp_inact)); 1149 1150 mesh_forward(vap, m, mc); 1151 return (1); /* dont process locally */ 1152} 1153 1154/* 1155 * Verifies transmitter, updates lifetime, precursor list and process data 1156 * locally, if data is is proxy with AE = 10 it could mean data should go 1157 * on another mesh path or data should be forwarded to the DS. 1158 * 1159 * > 0 means we have forwarded data and no need to process locally 1160 * == 0 means we want to process locally (and we may have forwarded data 1161 * < 0 means there was an error and data should be discarded 1162 */ 1163static int 1164mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1165 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1166{ 1167 struct ieee80211_qosframe_addr4 *qwh; 1168 const struct ieee80211_meshcntl_ae10 *mc10; 1169 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1170 struct ieee80211_mesh_route *rt; 1171 int ae; 1172 1173 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1174 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1175 1176 /* 1177 * TODO: 1178 * o verify addr2 is a legitimate transmitter 1179 * o lifetime of precursor entry is max(init, curr) 1180 */ 1181 1182 /* set lifetime of addr4 (meshSA) to initial value */ 1183 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1184 KASSERT(rt != NULL, ("no route")); 1185 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1186 rt = NULL; 1187 1188 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1189 KASSERT(ae == IEEE80211_MESH_AE_00 || 1190 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1191 if (ae == IEEE80211_MESH_AE_10) { 1192 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1193 return (0); /* process locally */ 1194 } 1195 1196 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1197 if (rt != NULL && 1198 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1199 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1200 /* 1201 * Forward on another mesh-path, according to 1202 * amendment as specified in 9.32.4.1 1203 */ 1204 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1205 mesh_forward(vap, m, 1206 (const struct ieee80211_meshcntl *)mc10); 1207 return (1); /* dont process locally */ 1208 } 1209 /* 1210 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1211 * addressed according to 13.11.3.2. 1212 */ 1213 } 1214 return (0); /* process locally */ 1215} 1216 1217/* 1218 * Try to forward the group addressed data on to other mesh STAs, and 1219 * also to the DS. 1220 * 1221 * > 0 means we have forwarded data and no need to process locally 1222 * == 0 means we want to process locally (and we may have forwarded data 1223 * < 0 means there was an error and data should be discarded 1224 */ 1225static int 1226mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1227 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1228{ 1229#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1230 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1231 1232 mesh_forward(vap, m, mc); 1233 1234 if(mc->mc_ttl > 0) { 1235 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1236 /* 1237 * Forward of MSDUs from the MBSS to DS group addressed 1238 * (according to 13.11.3.2) 1239 * This happens by delivering the packet, and a bridge 1240 * will sent it on another port member. 1241 */ 1242 if (ms->ms_flags & IEEE80211_MESHFLAGS_PORTAL && 1243 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1244 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1245 MC01(mc)->mc_addr4, "%s", 1246 "forward from MBSS to the DS"); 1247 } 1248 } 1249 return (0); /* process locally */ 1250#undef MC01 1251} 1252 1253static int 1254mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 1255{ 1256#define HAS_SEQ(type) ((type & 0x4) == 0) 1257#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1258#define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1259 struct ieee80211vap *vap = ni->ni_vap; 1260 struct ieee80211com *ic = ni->ni_ic; 1261 struct ifnet *ifp = vap->iv_ifp; 1262 struct ieee80211_frame *wh; 1263 const struct ieee80211_meshcntl *mc; 1264 int hdrspace, meshdrlen, need_tap, error; 1265 uint8_t dir, type, subtype, ae; 1266 uint32_t seq; 1267 const uint8_t *addr; 1268 uint8_t qos[2]; 1269 ieee80211_seq rxseq; 1270 1271 KASSERT(ni != NULL, ("null node")); 1272 ni->ni_inact = ni->ni_inact_reload; 1273 1274 need_tap = 1; /* mbuf need to be tapped. */ 1275 type = -1; /* undefined */ 1276 1277 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1278 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1279 ni->ni_macaddr, NULL, 1280 "too short (1): len %u", m->m_pkthdr.len); 1281 vap->iv_stats.is_rx_tooshort++; 1282 goto out; 1283 } 1284 /* 1285 * Bit of a cheat here, we use a pointer for a 3-address 1286 * frame format but don't reference fields past outside 1287 * ieee80211_frame_min w/o first validating the data is 1288 * present. 1289 */ 1290 wh = mtod(m, struct ieee80211_frame *); 1291 1292 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1293 IEEE80211_FC0_VERSION_0) { 1294 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1295 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1296 vap->iv_stats.is_rx_badversion++; 1297 goto err; 1298 } 1299 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1300 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1301 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1302 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1303 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1304 ni->ni_noise = nf; 1305 if (HAS_SEQ(type)) { 1306 uint8_t tid = ieee80211_gettid(wh); 1307 1308 if (IEEE80211_QOS_HAS_SEQ(wh) && 1309 TID_TO_WME_AC(tid) >= WME_AC_VI) 1310 ic->ic_wme.wme_hipri_traffic++; 1311 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1312 if (! ieee80211_check_rxseq(ni, wh)) { 1313 /* duplicate, discard */ 1314 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1315 wh->i_addr1, "duplicate", 1316 "seqno <%u,%u> fragno <%u,%u> tid %u", 1317 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1318 ni->ni_rxseqs[tid] >> 1319 IEEE80211_SEQ_SEQ_SHIFT, 1320 rxseq & IEEE80211_SEQ_FRAG_MASK, 1321 ni->ni_rxseqs[tid] & 1322 IEEE80211_SEQ_FRAG_MASK, 1323 tid); 1324 vap->iv_stats.is_rx_dup++; 1325 IEEE80211_NODE_STAT(ni, rx_dup); 1326 goto out; 1327 } 1328 ni->ni_rxseqs[tid] = rxseq; 1329 } 1330 } 1331#ifdef IEEE80211_DEBUG 1332 /* 1333 * It's easier, but too expensive, to simulate different mesh 1334 * topologies by consulting the ACL policy very early, so do this 1335 * only under DEBUG. 1336 * 1337 * NB: this check is also done upon peering link initiation. 1338 */ 1339 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1340 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1341 wh, NULL, "%s", "disallowed by ACL"); 1342 vap->iv_stats.is_rx_acl++; 1343 goto out; 1344 } 1345#endif 1346 switch (type) { 1347 case IEEE80211_FC0_TYPE_DATA: 1348 if (ni == vap->iv_bss) 1349 goto out; 1350 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1351 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1352 ni->ni_macaddr, NULL, 1353 "peer link not yet established (%d)", 1354 ni->ni_mlstate); 1355 vap->iv_stats.is_mesh_nolink++; 1356 goto out; 1357 } 1358 if (dir != IEEE80211_FC1_DIR_FROMDS && 1359 dir != IEEE80211_FC1_DIR_DSTODS) { 1360 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1361 wh, "data", "incorrect dir 0x%x", dir); 1362 vap->iv_stats.is_rx_wrongdir++; 1363 goto err; 1364 } 1365 1366 /* All Mesh data frames are QoS subtype */ 1367 if (!HAS_SEQ(type)) { 1368 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1369 wh, "data", "incorrect subtype 0x%x", subtype); 1370 vap->iv_stats.is_rx_badsubtype++; 1371 goto err; 1372 } 1373 1374 /* 1375 * Next up, any fragmentation. 1376 * XXX: we defrag before we even try to forward, 1377 * Mesh Control field is not present in sub-sequent 1378 * fragmented frames. This is in contrast to Draft 4.0. 1379 */ 1380 hdrspace = ieee80211_hdrspace(ic, wh); 1381 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1382 m = ieee80211_defrag(ni, m, hdrspace); 1383 if (m == NULL) { 1384 /* Fragment dropped or frame not complete yet */ 1385 goto out; 1386 } 1387 } 1388 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1389 1390 /* 1391 * Now we have a complete Mesh Data frame. 1392 */ 1393 1394 /* 1395 * Only fromDStoDS data frames use 4 address qos frames 1396 * as specified in amendment. Otherwise addr4 is located 1397 * in the Mesh Control field and a 3 address qos frame 1398 * is used. 1399 */ 1400 if (IEEE80211_IS_DSTODS(wh)) 1401 *(uint16_t *)qos = *(uint16_t *) 1402 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1403 else 1404 *(uint16_t *)qos = *(uint16_t *) 1405 ((struct ieee80211_qosframe *)wh)->i_qos; 1406 1407 /* 1408 * NB: The mesh STA sets the Mesh Control Present 1409 * subfield to 1 in the Mesh Data frame containing 1410 * an unfragmented MSDU, an A-MSDU, or the first 1411 * fragment of an MSDU. 1412 * After defrag it should always be present. 1413 */ 1414 if (!(qos[1] & IEEE80211_QOS_MC)) { 1415 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1416 ni->ni_macaddr, NULL, 1417 "%s", "Mesh control field not present"); 1418 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1419 goto err; 1420 } 1421 1422 /* pull up enough to get to the mesh control */ 1423 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1424 (m = m_pullup(m, hdrspace + 1425 sizeof(struct ieee80211_meshcntl))) == NULL) { 1426 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1427 ni->ni_macaddr, NULL, 1428 "data too short: expecting %u", hdrspace); 1429 vap->iv_stats.is_rx_tooshort++; 1430 goto out; /* XXX */ 1431 } 1432 /* 1433 * Now calculate the full extent of the headers. Note 1434 * mesh_decap will pull up anything we didn't get 1435 * above when it strips the 802.11 headers. 1436 */ 1437 mc = (const struct ieee80211_meshcntl *) 1438 (mtod(m, const uint8_t *) + hdrspace); 1439 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1440 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1441 ae * IEEE80211_ADDR_LEN; 1442 hdrspace += meshdrlen; 1443 1444 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1445 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1446 (m->m_len < hdrspace) && 1447 ((m = m_pullup(m, hdrspace)) == NULL)) { 1448 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1449 ni->ni_macaddr, NULL, 1450 "data too short: expecting %u", hdrspace); 1451 vap->iv_stats.is_rx_tooshort++; 1452 goto out; /* XXX */ 1453 } 1454 /* XXX: are we sure there is no reallocating after m_pullup? */ 1455 1456 seq = LE_READ_4(mc->mc_seq); 1457 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1458 addr = wh->i_addr3; 1459 else if (ae == IEEE80211_MESH_AE_01) 1460 addr = MC01(mc)->mc_addr4; 1461 else 1462 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1463 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1464 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1465 addr, "data", "%s", "not to me"); 1466 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1467 goto out; 1468 } 1469 if (mesh_checkpseq(vap, addr, seq) != 0) { 1470 vap->iv_stats.is_rx_dup++; 1471 goto out; 1472 } 1473 1474 /* This code "routes" the frame to the right control path */ 1475 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1476 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1477 error = 1478 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1479 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1480 error = mesh_recv_group_data(vap, m, wh, mc); 1481 else 1482 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1483 wh, mc); 1484 } else 1485 error = mesh_recv_group_data(vap, m, wh, mc); 1486 if (error < 0) 1487 goto err; 1488 else if (error > 0) 1489 goto out; 1490 1491 if (ieee80211_radiotap_active_vap(vap)) 1492 ieee80211_radiotap_rx(vap, m); 1493 need_tap = 0; 1494 1495 /* 1496 * Finally, strip the 802.11 header. 1497 */ 1498 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1499 if (m == NULL) { 1500 /* XXX mask bit to check for both */ 1501 /* don't count Null data frames as errors */ 1502 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1503 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1504 goto out; 1505 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1506 ni->ni_macaddr, "data", "%s", "decap error"); 1507 vap->iv_stats.is_rx_decap++; 1508 IEEE80211_NODE_STAT(ni, rx_decap); 1509 goto err; 1510 } 1511 if (qos[0] & IEEE80211_QOS_AMSDU) { 1512 m = ieee80211_decap_amsdu(ni, m); 1513 if (m == NULL) 1514 return IEEE80211_FC0_TYPE_DATA; 1515 } 1516 ieee80211_deliver_data(vap, ni, m); 1517 return type; 1518 case IEEE80211_FC0_TYPE_MGT: 1519 vap->iv_stats.is_rx_mgmt++; 1520 IEEE80211_NODE_STAT(ni, rx_mgmt); 1521 if (dir != IEEE80211_FC1_DIR_NODS) { 1522 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1523 wh, "mgt", "incorrect dir 0x%x", dir); 1524 vap->iv_stats.is_rx_wrongdir++; 1525 goto err; 1526 } 1527 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1528 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1529 ni->ni_macaddr, "mgt", "too short: len %u", 1530 m->m_pkthdr.len); 1531 vap->iv_stats.is_rx_tooshort++; 1532 goto out; 1533 } 1534#ifdef IEEE80211_DEBUG 1535 if ((ieee80211_msg_debug(vap) && 1536 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1537 ieee80211_msg_dumppkts(vap)) { 1538 if_printf(ifp, "received %s from %s rssi %d\n", 1539 ieee80211_mgt_subtype_name[subtype >> 1540 IEEE80211_FC0_SUBTYPE_SHIFT], 1541 ether_sprintf(wh->i_addr2), rssi); 1542 } 1543#endif 1544 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1545 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1546 wh, NULL, "%s", "WEP set but not permitted"); 1547 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1548 goto out; 1549 } 1550 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1551 goto out; 1552 case IEEE80211_FC0_TYPE_CTL: 1553 vap->iv_stats.is_rx_ctl++; 1554 IEEE80211_NODE_STAT(ni, rx_ctrl); 1555 goto out; 1556 default: 1557 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1558 wh, "bad", "frame type 0x%x", type); 1559 /* should not come here */ 1560 break; 1561 } 1562err: 1563 ifp->if_ierrors++; 1564out: 1565 if (m != NULL) { 1566 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1567 ieee80211_radiotap_rx(vap, m); 1568 m_freem(m); 1569 } 1570 return type; 1571#undef HAS_SEQ 1572#undef MC01 1573#undef MC10 1574} 1575 1576static void 1577mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1578 int rssi, int nf) 1579{ 1580 struct ieee80211vap *vap = ni->ni_vap; 1581 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1582 struct ieee80211com *ic = ni->ni_ic; 1583 struct ieee80211_frame *wh; 1584 struct ieee80211_mesh_route *rt; 1585 uint8_t *frm, *efrm; 1586 1587 wh = mtod(m0, struct ieee80211_frame *); 1588 frm = (uint8_t *)&wh[1]; 1589 efrm = mtod(m0, uint8_t *) + m0->m_len; 1590 switch (subtype) { 1591 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1592 case IEEE80211_FC0_SUBTYPE_BEACON: 1593 { 1594 struct ieee80211_scanparams scan; 1595 /* 1596 * We process beacon/probe response 1597 * frames to discover neighbors. 1598 */ 1599 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1600 return; 1601 /* 1602 * Count frame now that we know it's to be processed. 1603 */ 1604 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1605 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1606 IEEE80211_NODE_STAT(ni, rx_beacons); 1607 } else 1608 IEEE80211_NODE_STAT(ni, rx_proberesp); 1609 /* 1610 * If scanning, just pass information to the scan module. 1611 */ 1612 if (ic->ic_flags & IEEE80211_F_SCAN) { 1613 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1614 /* 1615 * Actively scanning a channel marked passive; 1616 * send a probe request now that we know there 1617 * is 802.11 traffic present. 1618 * 1619 * XXX check if the beacon we recv'd gives 1620 * us what we need and suppress the probe req 1621 */ 1622 ieee80211_probe_curchan(vap, 1); 1623 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1624 } 1625 ieee80211_add_scan(vap, &scan, wh, 1626 subtype, rssi, nf); 1627 return; 1628 } 1629 1630 /* The rest of this code assumes we are running */ 1631 if (vap->iv_state != IEEE80211_S_RUN) 1632 return; 1633 /* 1634 * Ignore non-mesh STAs. 1635 */ 1636 if ((scan.capinfo & 1637 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1638 scan.meshid == NULL || scan.meshconf == NULL) { 1639 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1640 wh, "beacon", "%s", "not a mesh sta"); 1641 vap->iv_stats.is_mesh_wrongmesh++; 1642 return; 1643 } 1644 /* 1645 * Ignore STAs for other mesh networks. 1646 */ 1647 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1648 mesh_verify_meshconf(vap, scan.meshconf)) { 1649 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1650 wh, "beacon", "%s", "not for our mesh"); 1651 vap->iv_stats.is_mesh_wrongmesh++; 1652 return; 1653 } 1654 /* 1655 * Peer only based on the current ACL policy. 1656 */ 1657 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1658 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1659 wh, NULL, "%s", "disallowed by ACL"); 1660 vap->iv_stats.is_rx_acl++; 1661 return; 1662 } 1663 /* 1664 * Do neighbor discovery. 1665 */ 1666 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1667 /* 1668 * Create a new entry in the neighbor table. 1669 */ 1670 ni = ieee80211_add_neighbor(vap, wh, &scan); 1671 } 1672 /* 1673 * Automatically peer with discovered nodes if possible. 1674 * XXX backoff on repeated failure 1675 */ 1676 if (ni != vap->iv_bss && 1677 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1678 switch (ni->ni_mlstate) { 1679 case IEEE80211_NODE_MESH_IDLE: 1680 { 1681 uint16_t args[1]; 1682 1683 ni->ni_mlpid = mesh_generateid(vap); 1684 if (ni->ni_mlpid == 0) 1685 return; 1686 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1687 args[0] = ni->ni_mlpid; 1688 ieee80211_send_action(ni, 1689 IEEE80211_ACTION_CAT_SELF_PROT, 1690 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1691 ni->ni_mlrcnt = 0; 1692 mesh_peer_timeout_setup(ni); 1693 break; 1694 } 1695 case IEEE80211_NODE_MESH_ESTABLISHED: 1696 { 1697 /* 1698 * Valid beacon from a peer mesh STA 1699 * bump TA lifetime 1700 */ 1701 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1702 if(rt != NULL) { 1703 ieee80211_mesh_rt_update(rt, 1704 ticks_to_msecs( 1705 ms->ms_ppath->mpp_inact)); 1706 } 1707 break; 1708 } 1709 default: 1710 break; /* ignore */ 1711 } 1712 } 1713 break; 1714 } 1715 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1716 { 1717 uint8_t *ssid, *meshid, *rates, *xrates; 1718 uint8_t *sfrm; 1719 1720 if (vap->iv_state != IEEE80211_S_RUN) { 1721 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1722 wh, NULL, "wrong state %s", 1723 ieee80211_state_name[vap->iv_state]); 1724 vap->iv_stats.is_rx_mgtdiscard++; 1725 return; 1726 } 1727 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1728 /* frame must be directed */ 1729 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1730 wh, NULL, "%s", "not unicast"); 1731 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1732 return; 1733 } 1734 /* 1735 * prreq frame format 1736 * [tlv] ssid 1737 * [tlv] supported rates 1738 * [tlv] extended supported rates 1739 * [tlv] mesh id 1740 */ 1741 ssid = meshid = rates = xrates = NULL; 1742 sfrm = frm; 1743 while (efrm - frm > 1) { 1744 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1745 switch (*frm) { 1746 case IEEE80211_ELEMID_SSID: 1747 ssid = frm; 1748 break; 1749 case IEEE80211_ELEMID_RATES: 1750 rates = frm; 1751 break; 1752 case IEEE80211_ELEMID_XRATES: 1753 xrates = frm; 1754 break; 1755 case IEEE80211_ELEMID_MESHID: 1756 meshid = frm; 1757 break; 1758 } 1759 frm += frm[1] + 2; 1760 } 1761 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1762 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1763 if (xrates != NULL) 1764 IEEE80211_VERIFY_ELEMENT(xrates, 1765 IEEE80211_RATE_MAXSIZE - rates[1], return); 1766 if (meshid != NULL) { 1767 IEEE80211_VERIFY_ELEMENT(meshid, 1768 IEEE80211_MESHID_LEN, return); 1769 /* NB: meshid, not ssid */ 1770 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 1771 } 1772 1773 /* XXX find a better class or define it's own */ 1774 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1775 "%s", "recv probe req"); 1776 /* 1777 * Some legacy 11b clients cannot hack a complete 1778 * probe response frame. When the request includes 1779 * only a bare-bones rate set, communicate this to 1780 * the transmit side. 1781 */ 1782 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 1783 break; 1784 } 1785 1786 case IEEE80211_FC0_SUBTYPE_ACTION: 1787 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 1788 if (ni == vap->iv_bss) { 1789 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1790 wh, NULL, "%s", "unknown node"); 1791 vap->iv_stats.is_rx_mgtdiscard++; 1792 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1793 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1794 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1795 wh, NULL, "%s", "not for us"); 1796 vap->iv_stats.is_rx_mgtdiscard++; 1797 } else if (vap->iv_state != IEEE80211_S_RUN) { 1798 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1799 wh, NULL, "wrong state %s", 1800 ieee80211_state_name[vap->iv_state]); 1801 vap->iv_stats.is_rx_mgtdiscard++; 1802 } else { 1803 if (ieee80211_parse_action(ni, m0) == 0) 1804 (void)ic->ic_recv_action(ni, wh, frm, efrm); 1805 } 1806 break; 1807 1808 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1809 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1810 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1811 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 1812 case IEEE80211_FC0_SUBTYPE_ATIM: 1813 case IEEE80211_FC0_SUBTYPE_DISASSOC: 1814 case IEEE80211_FC0_SUBTYPE_AUTH: 1815 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1816 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1817 wh, NULL, "%s", "not handled"); 1818 vap->iv_stats.is_rx_mgtdiscard++; 1819 break; 1820 1821 default: 1822 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1823 wh, "mgt", "subtype 0x%x not handled", subtype); 1824 vap->iv_stats.is_rx_badsubtype++; 1825 break; 1826 } 1827} 1828 1829static void 1830mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 1831{ 1832 1833 switch (subtype) { 1834 case IEEE80211_FC0_SUBTYPE_BAR: 1835 ieee80211_recv_bar(ni, m); 1836 break; 1837 } 1838} 1839 1840/* 1841 * Parse meshpeering action ie's for MPM frames 1842 */ 1843static const struct ieee80211_meshpeer_ie * 1844mesh_parse_meshpeering_action(struct ieee80211_node *ni, 1845 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 1846 const uint8_t *frm, const uint8_t *efrm, 1847 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 1848{ 1849 struct ieee80211vap *vap = ni->ni_vap; 1850 const struct ieee80211_meshpeer_ie *mpie; 1851 uint16_t args[3]; 1852 const uint8_t *meshid, *meshconf, *meshpeer; 1853 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 1854 1855 meshid = meshconf = meshpeer = NULL; 1856 while (efrm - frm > 1) { 1857 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 1858 switch (*frm) { 1859 case IEEE80211_ELEMID_MESHID: 1860 meshid = frm; 1861 break; 1862 case IEEE80211_ELEMID_MESHCONF: 1863 meshconf = frm; 1864 break; 1865 case IEEE80211_ELEMID_MESHPEER: 1866 meshpeer = frm; 1867 mpie = (const struct ieee80211_meshpeer_ie *) frm; 1868 memset(mp, 0, sizeof(*mp)); 1869 mp->peer_len = mpie->peer_len; 1870 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 1871 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 1872 switch (subtype) { 1873 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 1874 mp->peer_linkid = 1875 LE_READ_2(&mpie->peer_linkid); 1876 break; 1877 case IEEE80211_ACTION_MESHPEERING_CLOSE: 1878 /* NB: peer link ID is optional */ 1879 if (mpie->peer_len == 1880 (IEEE80211_MPM_BASE_SZ + 2)) { 1881 mp->peer_linkid = 0; 1882 mp->peer_rcode = 1883 LE_READ_2(&mpie->peer_linkid); 1884 } else { 1885 mp->peer_linkid = 1886 LE_READ_2(&mpie->peer_linkid); 1887 mp->peer_rcode = 1888 LE_READ_2(&mpie->peer_rcode); 1889 } 1890 break; 1891 } 1892 break; 1893 } 1894 frm += frm[1] + 2; 1895 } 1896 1897 /* 1898 * Verify the contents of the frame. 1899 * If it fails validation, close the peer link. 1900 */ 1901 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 1902 sendclose = 1; 1903 IEEE80211_DISCARD(vap, 1904 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1905 wh, NULL, "%s", "MPM validation failed"); 1906 } 1907 1908 /* If meshid is not the same reject any frames type. */ 1909 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 1910 sendclose = 1; 1911 IEEE80211_DISCARD(vap, 1912 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1913 wh, NULL, "%s", "not for our mesh"); 1914 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 1915 /* 1916 * Standard not clear about this, if we dont ignore 1917 * there will be an endless loop between nodes sending 1918 * CLOSE frames between each other with wrong meshid. 1919 * Discard and timers will bring FSM to IDLE state. 1920 */ 1921 return NULL; 1922 } 1923 } 1924 1925 /* 1926 * Close frames are accepted if meshid is the same. 1927 * Verify the other two types. 1928 */ 1929 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 1930 mesh_verify_meshconf(vap, meshconf)) { 1931 sendclose = 1; 1932 IEEE80211_DISCARD(vap, 1933 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1934 wh, NULL, "%s", "configuration missmatch"); 1935 } 1936 1937 if (sendclose) { 1938 vap->iv_stats.is_rx_mgtdiscard++; 1939 switch (ni->ni_mlstate) { 1940 case IEEE80211_NODE_MESH_IDLE: 1941 case IEEE80211_NODE_MESH_ESTABLISHED: 1942 case IEEE80211_NODE_MESH_HOLDING: 1943 /* ignore */ 1944 break; 1945 case IEEE80211_NODE_MESH_OPENSNT: 1946 case IEEE80211_NODE_MESH_OPENRCV: 1947 case IEEE80211_NODE_MESH_CONFIRMRCV: 1948 args[0] = ni->ni_mlpid; 1949 args[1] = ni->ni_mllid; 1950 /* Reason codes for rejection */ 1951 switch (subtype) { 1952 case IEEE80211_ACTION_MESHPEERING_OPEN: 1953 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 1954 break; 1955 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 1956 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 1957 break; 1958 } 1959 ieee80211_send_action(ni, 1960 IEEE80211_ACTION_CAT_SELF_PROT, 1961 IEEE80211_ACTION_MESHPEERING_CLOSE, 1962 args); 1963 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1964 mesh_peer_timeout_setup(ni); 1965 break; 1966 } 1967 return NULL; 1968 } 1969 1970 return (const struct ieee80211_meshpeer_ie *) mp; 1971} 1972 1973static int 1974mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 1975 const struct ieee80211_frame *wh, 1976 const uint8_t *frm, const uint8_t *efrm) 1977{ 1978 struct ieee80211vap *vap = ni->ni_vap; 1979 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1980 struct ieee80211_meshpeer_ie ie; 1981 const struct ieee80211_meshpeer_ie *meshpeer; 1982 uint16_t args[3]; 1983 1984 /* +2+2 for action + code + capabilites */ 1985 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 1986 IEEE80211_ACTION_MESHPEERING_OPEN); 1987 if (meshpeer == NULL) { 1988 return 0; 1989 } 1990 1991 /* XXX move up */ 1992 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1993 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 1994 1995 switch (ni->ni_mlstate) { 1996 case IEEE80211_NODE_MESH_IDLE: 1997 /* Reject open request if reached our maximum neighbor count */ 1998 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 1999 args[0] = meshpeer->peer_llinkid; 2000 args[1] = 0; 2001 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2002 ieee80211_send_action(ni, 2003 IEEE80211_ACTION_CAT_SELF_PROT, 2004 IEEE80211_ACTION_MESHPEERING_CLOSE, 2005 args); 2006 /* stay in IDLE state */ 2007 return (0); 2008 } 2009 /* Open frame accepted */ 2010 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2011 ni->ni_mllid = meshpeer->peer_llinkid; 2012 ni->ni_mlpid = mesh_generateid(vap); 2013 if (ni->ni_mlpid == 0) 2014 return 0; /* XXX */ 2015 args[0] = ni->ni_mlpid; 2016 /* Announce we're open too... */ 2017 ieee80211_send_action(ni, 2018 IEEE80211_ACTION_CAT_SELF_PROT, 2019 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2020 /* ...and confirm the link. */ 2021 args[0] = ni->ni_mlpid; 2022 args[1] = ni->ni_mllid; 2023 ieee80211_send_action(ni, 2024 IEEE80211_ACTION_CAT_SELF_PROT, 2025 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2026 args); 2027 mesh_peer_timeout_setup(ni); 2028 break; 2029 case IEEE80211_NODE_MESH_OPENRCV: 2030 /* Wrong Link ID */ 2031 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2032 args[0] = ni->ni_mllid; 2033 args[1] = ni->ni_mlpid; 2034 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2035 ieee80211_send_action(ni, 2036 IEEE80211_ACTION_CAT_SELF_PROT, 2037 IEEE80211_ACTION_MESHPEERING_CLOSE, 2038 args); 2039 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2040 mesh_peer_timeout_setup(ni); 2041 break; 2042 } 2043 /* Duplicate open, confirm again. */ 2044 args[0] = ni->ni_mlpid; 2045 args[1] = ni->ni_mllid; 2046 ieee80211_send_action(ni, 2047 IEEE80211_ACTION_CAT_SELF_PROT, 2048 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2049 args); 2050 break; 2051 case IEEE80211_NODE_MESH_OPENSNT: 2052 ni->ni_mllid = meshpeer->peer_llinkid; 2053 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2054 args[0] = ni->ni_mlpid; 2055 args[1] = ni->ni_mllid; 2056 ieee80211_send_action(ni, 2057 IEEE80211_ACTION_CAT_SELF_PROT, 2058 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2059 args); 2060 /* NB: don't setup/clear any timeout */ 2061 break; 2062 case IEEE80211_NODE_MESH_CONFIRMRCV: 2063 if (ni->ni_mlpid != meshpeer->peer_linkid || 2064 ni->ni_mllid != meshpeer->peer_llinkid) { 2065 args[0] = ni->ni_mlpid; 2066 args[1] = ni->ni_mllid; 2067 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2068 ieee80211_send_action(ni, 2069 IEEE80211_ACTION_CAT_SELF_PROT, 2070 IEEE80211_ACTION_MESHPEERING_CLOSE, 2071 args); 2072 mesh_linkchange(ni, 2073 IEEE80211_NODE_MESH_HOLDING); 2074 mesh_peer_timeout_setup(ni); 2075 break; 2076 } 2077 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2078 ni->ni_mllid = meshpeer->peer_llinkid; 2079 args[0] = ni->ni_mlpid; 2080 args[1] = ni->ni_mllid; 2081 ieee80211_send_action(ni, 2082 IEEE80211_ACTION_CAT_SELF_PROT, 2083 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2084 args); 2085 mesh_peer_timeout_stop(ni); 2086 break; 2087 case IEEE80211_NODE_MESH_ESTABLISHED: 2088 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2089 args[0] = ni->ni_mllid; 2090 args[1] = ni->ni_mlpid; 2091 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2092 ieee80211_send_action(ni, 2093 IEEE80211_ACTION_CAT_SELF_PROT, 2094 IEEE80211_ACTION_MESHPEERING_CLOSE, 2095 args); 2096 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2097 mesh_peer_timeout_setup(ni); 2098 break; 2099 } 2100 args[0] = ni->ni_mlpid; 2101 args[1] = ni->ni_mllid; 2102 ieee80211_send_action(ni, 2103 IEEE80211_ACTION_CAT_SELF_PROT, 2104 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2105 args); 2106 break; 2107 case IEEE80211_NODE_MESH_HOLDING: 2108 args[0] = ni->ni_mlpid; 2109 args[1] = meshpeer->peer_llinkid; 2110 /* Standard not clear about what the reaason code should be */ 2111 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2112 ieee80211_send_action(ni, 2113 IEEE80211_ACTION_CAT_SELF_PROT, 2114 IEEE80211_ACTION_MESHPEERING_CLOSE, 2115 args); 2116 break; 2117 } 2118 return 0; 2119} 2120 2121static int 2122mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2123 const struct ieee80211_frame *wh, 2124 const uint8_t *frm, const uint8_t *efrm) 2125{ 2126 struct ieee80211vap *vap = ni->ni_vap; 2127 struct ieee80211_meshpeer_ie ie; 2128 const struct ieee80211_meshpeer_ie *meshpeer; 2129 uint16_t args[3]; 2130 2131 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2132 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2133 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2134 if (meshpeer == NULL) { 2135 return 0; 2136 } 2137 2138 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2139 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2140 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2141 2142 switch (ni->ni_mlstate) { 2143 case IEEE80211_NODE_MESH_OPENRCV: 2144 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2145 mesh_peer_timeout_stop(ni); 2146 break; 2147 case IEEE80211_NODE_MESH_OPENSNT: 2148 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2149 mesh_peer_timeout_setup(ni); 2150 break; 2151 case IEEE80211_NODE_MESH_HOLDING: 2152 args[0] = ni->ni_mlpid; 2153 args[1] = meshpeer->peer_llinkid; 2154 /* Standard not clear about what the reaason code should be */ 2155 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2156 ieee80211_send_action(ni, 2157 IEEE80211_ACTION_CAT_SELF_PROT, 2158 IEEE80211_ACTION_MESHPEERING_CLOSE, 2159 args); 2160 break; 2161 case IEEE80211_NODE_MESH_CONFIRMRCV: 2162 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2163 args[0] = ni->ni_mlpid; 2164 args[1] = ni->ni_mllid; 2165 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2166 ieee80211_send_action(ni, 2167 IEEE80211_ACTION_CAT_SELF_PROT, 2168 IEEE80211_ACTION_MESHPEERING_CLOSE, 2169 args); 2170 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2171 mesh_peer_timeout_setup(ni); 2172 } 2173 break; 2174 default: 2175 IEEE80211_DISCARD(vap, 2176 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2177 wh, NULL, "received confirm in invalid state %d", 2178 ni->ni_mlstate); 2179 vap->iv_stats.is_rx_mgtdiscard++; 2180 break; 2181 } 2182 return 0; 2183} 2184 2185static int 2186mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2187 const struct ieee80211_frame *wh, 2188 const uint8_t *frm, const uint8_t *efrm) 2189{ 2190 struct ieee80211_meshpeer_ie ie; 2191 const struct ieee80211_meshpeer_ie *meshpeer; 2192 uint16_t args[3]; 2193 2194 /* +2 for action + code */ 2195 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2196 IEEE80211_ACTION_MESHPEERING_CLOSE); 2197 if (meshpeer == NULL) { 2198 return 0; 2199 } 2200 2201 /* 2202 * XXX: check reason code, for example we could receive 2203 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2204 * to peer again. 2205 */ 2206 2207 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2208 ni, "%s", "recv PEER CLOSE"); 2209 2210 switch (ni->ni_mlstate) { 2211 case IEEE80211_NODE_MESH_IDLE: 2212 /* ignore */ 2213 break; 2214 case IEEE80211_NODE_MESH_OPENRCV: 2215 case IEEE80211_NODE_MESH_OPENSNT: 2216 case IEEE80211_NODE_MESH_CONFIRMRCV: 2217 case IEEE80211_NODE_MESH_ESTABLISHED: 2218 args[0] = ni->ni_mlpid; 2219 args[1] = ni->ni_mllid; 2220 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2221 ieee80211_send_action(ni, 2222 IEEE80211_ACTION_CAT_SELF_PROT, 2223 IEEE80211_ACTION_MESHPEERING_CLOSE, 2224 args); 2225 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2226 mesh_peer_timeout_setup(ni); 2227 break; 2228 case IEEE80211_NODE_MESH_HOLDING: 2229 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2230 mesh_peer_timeout_stop(ni); 2231 break; 2232 } 2233 return 0; 2234} 2235 2236/* 2237 * Link Metric handling. 2238 */ 2239static int 2240mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2241 const struct ieee80211_frame *wh, 2242 const uint8_t *frm, const uint8_t *efrm) 2243{ 2244 const struct ieee80211_meshlmetric_ie *ie = 2245 (const struct ieee80211_meshlmetric_ie *) 2246 (frm+2); /* action + code */ 2247 struct ieee80211_meshlmetric_ie lm_rep; 2248 2249 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2250 lm_rep.lm_flags = 0; 2251 lm_rep.lm_metric = mesh_airtime_calc(ni); 2252 ieee80211_send_action(ni, 2253 IEEE80211_ACTION_CAT_MESH, 2254 IEEE80211_ACTION_MESH_LMETRIC, 2255 &lm_rep); 2256 } 2257 /* XXX: else do nothing for now */ 2258 return 0; 2259} 2260 2261static int 2262mesh_send_action(struct ieee80211_node *ni, struct mbuf *m) 2263{ 2264 struct ieee80211_bpf_params params; 2265 2266 memset(¶ms, 0, sizeof(params)); 2267 params.ibp_pri = WME_AC_VO; 2268 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2269 /* XXX ucast/mcast */ 2270 params.ibp_try0 = ni->ni_txparms->maxretry; 2271 params.ibp_power = ni->ni_txpower; 2272 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION, 2273 ¶ms); 2274} 2275 2276#define ADDSHORT(frm, v) do { \ 2277 frm[0] = (v) & 0xff; \ 2278 frm[1] = (v) >> 8; \ 2279 frm += 2; \ 2280} while (0) 2281#define ADDWORD(frm, v) do { \ 2282 frm[0] = (v) & 0xff; \ 2283 frm[1] = ((v) >> 8) & 0xff; \ 2284 frm[2] = ((v) >> 16) & 0xff; \ 2285 frm[3] = ((v) >> 24) & 0xff; \ 2286 frm += 4; \ 2287} while (0) 2288 2289static int 2290mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2291 int category, int action, void *args0) 2292{ 2293 struct ieee80211vap *vap = ni->ni_vap; 2294 struct ieee80211com *ic = ni->ni_ic; 2295 uint16_t *args = args0; 2296 const struct ieee80211_rateset *rs; 2297 struct mbuf *m; 2298 uint8_t *frm; 2299 2300 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2301 "send PEER OPEN action: localid 0x%x", args[0]); 2302 2303 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2304 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2305 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2306 ieee80211_ref_node(ni); 2307 2308 m = ieee80211_getmgtframe(&frm, 2309 ic->ic_headroom + sizeof(struct ieee80211_frame), 2310 sizeof(uint16_t) /* action+category */ 2311 + sizeof(uint16_t) /* capabilites */ 2312 + 2 + IEEE80211_RATE_SIZE 2313 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2314 + 2 + IEEE80211_MESHID_LEN 2315 + sizeof(struct ieee80211_meshconf_ie) 2316 + sizeof(struct ieee80211_meshpeer_ie) 2317 ); 2318 if (m != NULL) { 2319 /* 2320 * mesh peer open action frame format: 2321 * [1] category 2322 * [1] action 2323 * [2] capabilities 2324 * [tlv] rates 2325 * [tlv] xrates 2326 * [tlv] mesh id 2327 * [tlv] mesh conf 2328 * [tlv] mesh peer link mgmt 2329 */ 2330 *frm++ = category; 2331 *frm++ = action; 2332 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2333 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2334 frm = ieee80211_add_rates(frm, rs); 2335 frm = ieee80211_add_xrates(frm, rs); 2336 frm = ieee80211_add_meshid(frm, vap); 2337 frm = ieee80211_add_meshconf(frm, vap); 2338 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2339 args[0], 0, 0); 2340 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2341 return mesh_send_action(ni, m); 2342 } else { 2343 vap->iv_stats.is_tx_nobuf++; 2344 ieee80211_free_node(ni); 2345 return ENOMEM; 2346 } 2347} 2348 2349static int 2350mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2351 int category, int action, void *args0) 2352{ 2353 struct ieee80211vap *vap = ni->ni_vap; 2354 struct ieee80211com *ic = ni->ni_ic; 2355 uint16_t *args = args0; 2356 const struct ieee80211_rateset *rs; 2357 struct mbuf *m; 2358 uint8_t *frm; 2359 2360 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2361 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2362 args[0], args[1]); 2363 2364 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2365 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2366 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2367 ieee80211_ref_node(ni); 2368 2369 m = ieee80211_getmgtframe(&frm, 2370 ic->ic_headroom + sizeof(struct ieee80211_frame), 2371 sizeof(uint16_t) /* action+category */ 2372 + sizeof(uint16_t) /* capabilites */ 2373 + sizeof(uint16_t) /* status code */ 2374 + sizeof(uint16_t) /* AID */ 2375 + 2 + IEEE80211_RATE_SIZE 2376 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2377 + 2 + IEEE80211_MESHID_LEN 2378 + sizeof(struct ieee80211_meshconf_ie) 2379 + sizeof(struct ieee80211_meshpeer_ie) 2380 ); 2381 if (m != NULL) { 2382 /* 2383 * mesh peer confirm action frame format: 2384 * [1] category 2385 * [1] action 2386 * [2] capabilities 2387 * [2] status code 2388 * [2] association id (peer ID) 2389 * [tlv] rates 2390 * [tlv] xrates 2391 * [tlv] mesh id 2392 * [tlv] mesh conf 2393 * [tlv] mesh peer link mgmt 2394 */ 2395 *frm++ = category; 2396 *frm++ = action; 2397 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2398 ADDSHORT(frm, 0); /* status code */ 2399 ADDSHORT(frm, args[1]); /* AID */ 2400 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2401 frm = ieee80211_add_rates(frm, rs); 2402 frm = ieee80211_add_xrates(frm, rs); 2403 frm = ieee80211_add_meshid(frm, vap); 2404 frm = ieee80211_add_meshconf(frm, vap); 2405 frm = ieee80211_add_meshpeer(frm, 2406 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2407 args[0], args[1], 0); 2408 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2409 return mesh_send_action(ni, m); 2410 } else { 2411 vap->iv_stats.is_tx_nobuf++; 2412 ieee80211_free_node(ni); 2413 return ENOMEM; 2414 } 2415} 2416 2417static int 2418mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2419 int category, int action, void *args0) 2420{ 2421 struct ieee80211vap *vap = ni->ni_vap; 2422 struct ieee80211com *ic = ni->ni_ic; 2423 uint16_t *args = args0; 2424 struct mbuf *m; 2425 uint8_t *frm; 2426 2427 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2428 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2429 args[0], args[1], args[2]); 2430 2431 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2432 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2433 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2434 ieee80211_ref_node(ni); 2435 2436 m = ieee80211_getmgtframe(&frm, 2437 ic->ic_headroom + sizeof(struct ieee80211_frame), 2438 sizeof(uint16_t) /* action+category */ 2439 + sizeof(uint16_t) /* reason code */ 2440 + 2 + IEEE80211_MESHID_LEN 2441 + sizeof(struct ieee80211_meshpeer_ie) 2442 ); 2443 if (m != NULL) { 2444 /* 2445 * mesh peer close action frame format: 2446 * [1] category 2447 * [1] action 2448 * [tlv] mesh id 2449 * [tlv] mesh peer link mgmt 2450 */ 2451 *frm++ = category; 2452 *frm++ = action; 2453 frm = ieee80211_add_meshid(frm, vap); 2454 frm = ieee80211_add_meshpeer(frm, 2455 IEEE80211_ACTION_MESHPEERING_CLOSE, 2456 args[0], args[1], args[2]); 2457 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2458 return mesh_send_action(ni, m); 2459 } else { 2460 vap->iv_stats.is_tx_nobuf++; 2461 ieee80211_free_node(ni); 2462 return ENOMEM; 2463 } 2464} 2465 2466static int 2467mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2468 int category, int action, void *arg0) 2469{ 2470 struct ieee80211vap *vap = ni->ni_vap; 2471 struct ieee80211com *ic = ni->ni_ic; 2472 struct ieee80211_meshlmetric_ie *ie = arg0; 2473 struct mbuf *m; 2474 uint8_t *frm; 2475 2476 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2477 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2478 ni, "%s", "send LINK METRIC REQUEST action"); 2479 } else { 2480 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2481 ni, "send LINK METRIC REPLY action: metric 0x%x", 2482 ie->lm_metric); 2483 } 2484 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2485 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2486 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2487 ieee80211_ref_node(ni); 2488 2489 m = ieee80211_getmgtframe(&frm, 2490 ic->ic_headroom + sizeof(struct ieee80211_frame), 2491 sizeof(uint16_t) + /* action+category */ 2492 sizeof(struct ieee80211_meshlmetric_ie) 2493 ); 2494 if (m != NULL) { 2495 /* 2496 * mesh link metric 2497 * [1] category 2498 * [1] action 2499 * [tlv] mesh link metric 2500 */ 2501 *frm++ = category; 2502 *frm++ = action; 2503 frm = ieee80211_add_meshlmetric(frm, 2504 ie->lm_flags, ie->lm_metric); 2505 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2506 return mesh_send_action(ni, m); 2507 } else { 2508 vap->iv_stats.is_tx_nobuf++; 2509 ieee80211_free_node(ni); 2510 return ENOMEM; 2511 } 2512} 2513 2514static void 2515mesh_peer_timeout_setup(struct ieee80211_node *ni) 2516{ 2517 switch (ni->ni_mlstate) { 2518 case IEEE80211_NODE_MESH_HOLDING: 2519 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 2520 break; 2521 case IEEE80211_NODE_MESH_CONFIRMRCV: 2522 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 2523 break; 2524 case IEEE80211_NODE_MESH_IDLE: 2525 ni->ni_mltval = 0; 2526 break; 2527 default: 2528 ni->ni_mltval = ieee80211_mesh_retrytimeout; 2529 break; 2530 } 2531 if (ni->ni_mltval) 2532 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2533 mesh_peer_timeout_cb, ni); 2534} 2535 2536/* 2537 * Same as above but backoffs timer statisically 50%. 2538 */ 2539static void 2540mesh_peer_timeout_backoff(struct ieee80211_node *ni) 2541{ 2542 uint32_t r; 2543 2544 r = arc4random(); 2545 ni->ni_mltval += r % ni->ni_mltval; 2546 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 2547 ni); 2548} 2549 2550static __inline void 2551mesh_peer_timeout_stop(struct ieee80211_node *ni) 2552{ 2553 callout_drain(&ni->ni_mltimer); 2554} 2555 2556/* 2557 * Mesh Peer Link Management FSM timeout handling. 2558 */ 2559static void 2560mesh_peer_timeout_cb(void *arg) 2561{ 2562 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 2563 uint16_t args[3]; 2564 2565 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 2566 ni, "mesh link timeout, state %d, retry counter %d", 2567 ni->ni_mlstate, ni->ni_mlrcnt); 2568 2569 switch (ni->ni_mlstate) { 2570 case IEEE80211_NODE_MESH_IDLE: 2571 case IEEE80211_NODE_MESH_ESTABLISHED: 2572 break; 2573 case IEEE80211_NODE_MESH_OPENSNT: 2574 case IEEE80211_NODE_MESH_OPENRCV: 2575 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 2576 args[0] = ni->ni_mlpid; 2577 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 2578 ieee80211_send_action(ni, 2579 IEEE80211_ACTION_CAT_SELF_PROT, 2580 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2581 ni->ni_mlrcnt = 0; 2582 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2583 mesh_peer_timeout_setup(ni); 2584 } else { 2585 args[0] = ni->ni_mlpid; 2586 ieee80211_send_action(ni, 2587 IEEE80211_ACTION_CAT_SELF_PROT, 2588 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2589 ni->ni_mlrcnt++; 2590 mesh_peer_timeout_backoff(ni); 2591 } 2592 break; 2593 case IEEE80211_NODE_MESH_CONFIRMRCV: 2594 args[0] = ni->ni_mlpid; 2595 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 2596 ieee80211_send_action(ni, 2597 IEEE80211_ACTION_CAT_SELF_PROT, 2598 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2599 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2600 mesh_peer_timeout_setup(ni); 2601 break; 2602 case IEEE80211_NODE_MESH_HOLDING: 2603 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2604 break; 2605 } 2606} 2607 2608static int 2609mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 2610{ 2611 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2612 2613 if (ie == NULL || ie[1] != ms->ms_idlen) 2614 return 1; 2615 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 2616} 2617 2618/* 2619 * Check if we are using the same algorithms for this mesh. 2620 */ 2621static int 2622mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 2623{ 2624 const struct ieee80211_meshconf_ie *meshconf = 2625 (const struct ieee80211_meshconf_ie *) ie; 2626 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 2627 2628 if (meshconf == NULL) 2629 return 1; 2630 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 2631 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2632 "unknown path selection algorithm: 0x%x\n", 2633 meshconf->conf_pselid); 2634 return 1; 2635 } 2636 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 2637 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2638 "unknown path metric algorithm: 0x%x\n", 2639 meshconf->conf_pmetid); 2640 return 1; 2641 } 2642 if (meshconf->conf_ccid != 0) { 2643 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2644 "unknown congestion control algorithm: 0x%x\n", 2645 meshconf->conf_ccid); 2646 return 1; 2647 } 2648 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 2649 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2650 "unknown sync algorithm: 0x%x\n", 2651 meshconf->conf_syncid); 2652 return 1; 2653 } 2654 if (meshconf->conf_authid != 0) { 2655 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2656 "unknown auth auth algorithm: 0x%x\n", 2657 meshconf->conf_pselid); 2658 return 1; 2659 } 2660 /* Not accepting peers */ 2661 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 2662 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2663 "not accepting peers: 0x%x\n", meshconf->conf_cap); 2664 return 1; 2665 } 2666 return 0; 2667} 2668 2669static int 2670mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 2671 const uint8_t *ie) 2672{ 2673 const struct ieee80211_meshpeer_ie *meshpeer = 2674 (const struct ieee80211_meshpeer_ie *) ie; 2675 2676 if (meshpeer == NULL || 2677 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 2678 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 2679 return 1; 2680 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 2681 IEEE80211_DPRINTF(vap, 2682 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2683 "Only MPM protocol is supported (proto: 0x%02X)", 2684 meshpeer->peer_proto); 2685 return 1; 2686 } 2687 switch (subtype) { 2688 case IEEE80211_ACTION_MESHPEERING_OPEN: 2689 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 2690 return 1; 2691 break; 2692 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2693 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 2694 return 1; 2695 break; 2696 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2697 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 2698 return 1; 2699 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 2700 meshpeer->peer_linkid != 0) 2701 return 1; 2702 if (meshpeer->peer_rcode == 0) 2703 return 1; 2704 break; 2705 } 2706 return 0; 2707} 2708 2709/* 2710 * Add a Mesh ID IE to a frame. 2711 */ 2712uint8_t * 2713ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 2714{ 2715 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2716 2717 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 2718 2719 *frm++ = IEEE80211_ELEMID_MESHID; 2720 *frm++ = ms->ms_idlen; 2721 memcpy(frm, ms->ms_id, ms->ms_idlen); 2722 return frm + ms->ms_idlen; 2723} 2724 2725/* 2726 * Add a Mesh Configuration IE to a frame. 2727 * For now just use HWMP routing, Airtime link metric, Null Congestion 2728 * Signaling, Null Sync Protocol and Null Authentication. 2729 */ 2730uint8_t * 2731ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 2732{ 2733 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 2734 uint16_t caps; 2735 2736 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 2737 2738 *frm++ = IEEE80211_ELEMID_MESHCONF; 2739 *frm++ = IEEE80211_MESH_CONF_SZ; 2740 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 2741 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 2742 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 2743 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 2744 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 2745 /* NB: set the number of neighbors before the rest */ 2746 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 2747 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 2748 if (ms->ms_flags & IEEE80211_MESHFLAGS_PORTAL) 2749 *frm |= IEEE80211_MESHCONF_FORM_MP; 2750 frm += 1; 2751 caps = 0; 2752 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 2753 caps |= IEEE80211_MESHCONF_CAP_AP; 2754 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 2755 caps |= IEEE80211_MESHCONF_CAP_FWRD; 2756 *frm++ = caps; 2757 return frm; 2758} 2759 2760/* 2761 * Add a Mesh Peer Management IE to a frame. 2762 */ 2763uint8_t * 2764ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 2765 uint16_t peerid, uint16_t reason) 2766{ 2767 2768 KASSERT(localid != 0, ("localid == 0")); 2769 2770 *frm++ = IEEE80211_ELEMID_MESHPEER; 2771 switch (subtype) { 2772 case IEEE80211_ACTION_MESHPEERING_OPEN: 2773 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 2774 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 2775 ADDSHORT(frm, localid); /* local ID */ 2776 break; 2777 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2778 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 2779 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 2780 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 2781 ADDSHORT(frm, localid); /* local ID */ 2782 ADDSHORT(frm, peerid); /* peer ID */ 2783 break; 2784 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2785 if (peerid) 2786 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 2787 else 2788 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 2789 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 2790 ADDSHORT(frm, localid); /* local ID */ 2791 if (peerid) 2792 ADDSHORT(frm, peerid); /* peer ID */ 2793 ADDSHORT(frm, reason); 2794 break; 2795 } 2796 return frm; 2797} 2798 2799/* 2800 * Compute an Airtime Link Metric for the link with this node. 2801 * 2802 * Based on Draft 3.0 spec (11B.10, p.149). 2803 */ 2804/* 2805 * Max 802.11s overhead. 2806 */ 2807#define IEEE80211_MESH_MAXOVERHEAD \ 2808 (sizeof(struct ieee80211_qosframe_addr4) \ 2809 + sizeof(struct ieee80211_meshcntl_ae10) \ 2810 + sizeof(struct llc) \ 2811 + IEEE80211_ADDR_LEN \ 2812 + IEEE80211_WEP_IVLEN \ 2813 + IEEE80211_WEP_KIDLEN \ 2814 + IEEE80211_WEP_CRCLEN \ 2815 + IEEE80211_WEP_MICLEN \ 2816 + IEEE80211_CRC_LEN) 2817uint32_t 2818mesh_airtime_calc(struct ieee80211_node *ni) 2819{ 2820#define M_BITS 8 2821#define S_FACTOR (2 * M_BITS) 2822 struct ieee80211com *ic = ni->ni_ic; 2823 struct ifnet *ifp = ni->ni_vap->iv_ifp; 2824 const static int nbits = 8192 << M_BITS; 2825 uint32_t overhead, rate, errrate; 2826 uint64_t res; 2827 2828 /* Time to transmit a frame */ 2829 rate = ni->ni_txrate; 2830 overhead = ieee80211_compute_duration(ic->ic_rt, 2831 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 2832 /* Error rate in percentage */ 2833 /* XXX assuming small failures are ok */ 2834 errrate = (((ifp->if_oerrors + 2835 ifp->if_ierrors) / 100) << M_BITS) / 100; 2836 res = (overhead + (nbits / rate)) * 2837 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 2838 2839 return (uint32_t)(res >> S_FACTOR); 2840#undef M_BITS 2841#undef S_FACTOR 2842} 2843 2844/* 2845 * Add a Mesh Link Metric report IE to a frame. 2846 */ 2847uint8_t * 2848ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 2849{ 2850 *frm++ = IEEE80211_ELEMID_MESHLINK; 2851 *frm++ = 5; 2852 *frm++ = flags; 2853 ADDWORD(frm, metric); 2854 return frm; 2855} 2856#undef ADDSHORT 2857#undef ADDWORD 2858 2859/* 2860 * Initialize any mesh-specific node state. 2861 */ 2862void 2863ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 2864{ 2865 ni->ni_flags |= IEEE80211_NODE_QOS; 2866 callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE); 2867} 2868 2869/* 2870 * Cleanup any mesh-specific node state. 2871 */ 2872void 2873ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 2874{ 2875 struct ieee80211vap *vap = ni->ni_vap; 2876 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2877 2878 callout_drain(&ni->ni_mltimer); 2879 /* NB: short-circuit callbacks after mesh_vdetach */ 2880 if (vap->iv_mesh != NULL) 2881 ms->ms_ppath->mpp_peerdown(ni); 2882} 2883 2884void 2885ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 2886{ 2887 ni->ni_meshidlen = ie[1]; 2888 memcpy(ni->ni_meshid, ie + 2, ie[1]); 2889} 2890 2891/* 2892 * Setup mesh-specific node state on neighbor discovery. 2893 */ 2894void 2895ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 2896 const struct ieee80211_frame *wh, 2897 const struct ieee80211_scanparams *sp) 2898{ 2899 ieee80211_parse_meshid(ni, sp->meshid); 2900} 2901 2902void 2903ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 2904 struct ieee80211_beacon_offsets *bo) 2905{ 2906 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 2907 2908 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 2909 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 2910 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 2911 } 2912} 2913 2914static int 2915mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 2916{ 2917 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2918 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 2919 struct ieee80211_mesh_route *rt; 2920 struct ieee80211req_mesh_route *imr; 2921 size_t len, off; 2922 uint8_t *p; 2923 int error; 2924 2925 if (vap->iv_opmode != IEEE80211_M_MBSS) 2926 return ENOSYS; 2927 2928 error = 0; 2929 switch (ireq->i_type) { 2930 case IEEE80211_IOC_MESH_ID: 2931 ireq->i_len = ms->ms_idlen; 2932 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 2933 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 2934 break; 2935 case IEEE80211_IOC_MESH_AP: 2936 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 2937 break; 2938 case IEEE80211_IOC_MESH_FWRD: 2939 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 2940 break; 2941 case IEEE80211_IOC_MESH_TTL: 2942 ireq->i_val = ms->ms_ttl; 2943 break; 2944 case IEEE80211_IOC_MESH_RTCMD: 2945 switch (ireq->i_val) { 2946 case IEEE80211_MESH_RTCMD_LIST: 2947 len = 0; 2948 MESH_RT_LOCK(ms); 2949 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 2950 len += sizeof(*imr); 2951 } 2952 MESH_RT_UNLOCK(ms); 2953 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 2954 ireq->i_len = len; 2955 return ENOMEM; 2956 } 2957 ireq->i_len = len; 2958 /* XXX M_WAIT? */ 2959 p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO); 2960 if (p == NULL) 2961 return ENOMEM; 2962 off = 0; 2963 MESH_RT_LOCK(ms); 2964 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 2965 if (off >= len) 2966 break; 2967 imr = (struct ieee80211req_mesh_route *) 2968 (p + off); 2969 IEEE80211_ADDR_COPY(imr->imr_dest, 2970 rt->rt_dest); 2971 IEEE80211_ADDR_COPY(imr->imr_nexthop, 2972 rt->rt_nexthop); 2973 imr->imr_metric = rt->rt_metric; 2974 imr->imr_nhops = rt->rt_nhops; 2975 imr->imr_lifetime = 2976 ieee80211_mesh_rt_update(rt, 0); 2977 imr->imr_lastmseq = rt->rt_lastmseq; 2978 imr->imr_flags = rt->rt_flags; /* last */ 2979 off += sizeof(*imr); 2980 } 2981 MESH_RT_UNLOCK(ms); 2982 error = copyout(p, (uint8_t *)ireq->i_data, 2983 ireq->i_len); 2984 free(p, M_TEMP); 2985 break; 2986 case IEEE80211_MESH_RTCMD_FLUSH: 2987 case IEEE80211_MESH_RTCMD_ADD: 2988 case IEEE80211_MESH_RTCMD_DELETE: 2989 return EINVAL; 2990 default: 2991 return ENOSYS; 2992 } 2993 break; 2994 case IEEE80211_IOC_MESH_PR_METRIC: 2995 len = strlen(ms->ms_pmetric->mpm_descr); 2996 if (ireq->i_len < len) 2997 return EINVAL; 2998 ireq->i_len = len; 2999 error = copyout(ms->ms_pmetric->mpm_descr, 3000 (uint8_t *)ireq->i_data, len); 3001 break; 3002 case IEEE80211_IOC_MESH_PR_PATH: 3003 len = strlen(ms->ms_ppath->mpp_descr); 3004 if (ireq->i_len < len) 3005 return EINVAL; 3006 ireq->i_len = len; 3007 error = copyout(ms->ms_ppath->mpp_descr, 3008 (uint8_t *)ireq->i_data, len); 3009 break; 3010 default: 3011 return ENOSYS; 3012 } 3013 3014 return error; 3015} 3016IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3017 3018static int 3019mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3020{ 3021 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3022 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3023 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3024 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3025 int error; 3026 3027 if (vap->iv_opmode != IEEE80211_M_MBSS) 3028 return ENOSYS; 3029 3030 error = 0; 3031 switch (ireq->i_type) { 3032 case IEEE80211_IOC_MESH_ID: 3033 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3034 return EINVAL; 3035 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3036 if (error != 0) 3037 break; 3038 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3039 ms->ms_idlen = ireq->i_len; 3040 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3041 error = ENETRESET; 3042 break; 3043 case IEEE80211_IOC_MESH_AP: 3044 if (ireq->i_val) 3045 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3046 else 3047 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3048 error = ENETRESET; 3049 break; 3050 case IEEE80211_IOC_MESH_FWRD: 3051 if (ireq->i_val) 3052 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3053 else 3054 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3055 break; 3056 case IEEE80211_IOC_MESH_TTL: 3057 ms->ms_ttl = (uint8_t) ireq->i_val; 3058 break; 3059 case IEEE80211_IOC_MESH_RTCMD: 3060 switch (ireq->i_val) { 3061 case IEEE80211_MESH_RTCMD_LIST: 3062 return EINVAL; 3063 case IEEE80211_MESH_RTCMD_FLUSH: 3064 ieee80211_mesh_rt_flush(vap); 3065 break; 3066 case IEEE80211_MESH_RTCMD_ADD: 3067 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3068 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3069 return EINVAL; 3070 error = copyin(ireq->i_data, &tmpaddr, 3071 IEEE80211_ADDR_LEN); 3072 if (error == 0) 3073 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3074 break; 3075 case IEEE80211_MESH_RTCMD_DELETE: 3076 ieee80211_mesh_rt_del(vap, ireq->i_data); 3077 break; 3078 default: 3079 return ENOSYS; 3080 } 3081 break; 3082 case IEEE80211_IOC_MESH_PR_METRIC: 3083 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3084 if (error == 0) { 3085 error = mesh_select_proto_metric(vap, tmpproto); 3086 if (error == 0) 3087 error = ENETRESET; 3088 } 3089 break; 3090 case IEEE80211_IOC_MESH_PR_PATH: 3091 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3092 if (error == 0) { 3093 error = mesh_select_proto_path(vap, tmpproto); 3094 if (error == 0) 3095 error = ENETRESET; 3096 } 3097 break; 3098 default: 3099 return ENOSYS; 3100 } 3101 return error; 3102} 3103IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3104