ieee80211_mesh.c revision 234881
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 234881 2012-05-01 16:02:31Z 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 KASSERT(rt != NULL, ("route is NULL")); 243 244 now = ticks; 245 RT_ENTRY_LOCK(rt); 246 247 /* dont clobber a proxy entry gated by us */ 248 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 249 RT_ENTRY_UNLOCK(rt); 250 return rt->rt_lifetime; 251 } 252 253 timesince = ticks_to_msecs(now - rt->rt_updtime); 254 rt->rt_updtime = now; 255 if (timesince >= rt->rt_lifetime) { 256 if (new_lifetime != 0) { 257 rt->rt_lifetime = new_lifetime; 258 } 259 else { 260 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 261 rt->rt_lifetime = 0; 262 } 263 } else { 264 /* update what is left of lifetime */ 265 rt->rt_lifetime = rt->rt_lifetime - timesince; 266 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 267 new_lifetime, rt->rt_lifetime); 268 } 269 lifetime = rt->rt_lifetime; 270 RT_ENTRY_UNLOCK(rt); 271 272 return lifetime; 273} 274 275/* 276 * Add a proxy route (as needed) for the specified destination. 277 */ 278void 279ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 280 const uint8_t dest[IEEE80211_ADDR_LEN]) 281{ 282 struct ieee80211_mesh_state *ms = vap->iv_mesh; 283 struct ieee80211_mesh_route *rt; 284 285 MESH_RT_LOCK(ms); 286 rt = mesh_rt_find_locked(ms, dest); 287 if (rt == NULL) { 288 rt = mesh_rt_add_locked(ms, dest); 289 if (rt == NULL) { 290 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 291 "%s", "unable to add proxy entry"); 292 vap->iv_stats.is_mesh_rtaddfailed++; 293 } else { 294 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 295 "%s", "add proxy entry"); 296 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 297 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 298 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 299 | IEEE80211_MESHRT_FLAGS_PROXY; 300 } 301 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 302 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 303 ("no proxy flag for poxy entry")); 304 struct ieee80211com *ic = vap->iv_ic; 305 /* 306 * Fix existing entry created by received frames from 307 * stations that have some memory of dest. We also 308 * flush any frames held on the staging queue; delivering 309 * them is too much trouble right now. 310 */ 311 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 312 "%s", "fix proxy entry"); 313 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 314 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 315 | IEEE80211_MESHRT_FLAGS_PROXY; 316 /* XXX belongs in hwmp */ 317 ieee80211_ageq_drain_node(&ic->ic_stageq, 318 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 319 /* XXX stat? */ 320 } 321 MESH_RT_UNLOCK(ms); 322} 323 324static __inline void 325mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 326{ 327 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 328 /* 329 * Grab the lock before destroying it, to be sure no one else 330 * is holding the route. 331 */ 332 RT_ENTRY_LOCK(rt); 333 mtx_destroy(&rt->rt_lock); 334 free(rt, M_80211_MESH_RT); 335} 336 337void 338ieee80211_mesh_rt_del(struct ieee80211vap *vap, 339 const uint8_t dest[IEEE80211_ADDR_LEN]) 340{ 341 struct ieee80211_mesh_state *ms = vap->iv_mesh; 342 struct ieee80211_mesh_route *rt, *next; 343 344 MESH_RT_LOCK(ms); 345 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 346 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 347 mesh_rt_del(ms, rt); 348 MESH_RT_UNLOCK(ms); 349 return; 350 } 351 } 352 MESH_RT_UNLOCK(ms); 353} 354 355void 356ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 357{ 358 struct ieee80211_mesh_state *ms = vap->iv_mesh; 359 struct ieee80211_mesh_route *rt, *next; 360 361 if (ms == NULL) 362 return; 363 MESH_RT_LOCK(ms); 364 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 365 mesh_rt_del(ms, rt); 366 MESH_RT_UNLOCK(ms); 367} 368 369void 370ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 371 const uint8_t peer[IEEE80211_ADDR_LEN]) 372{ 373 struct ieee80211_mesh_state *ms = vap->iv_mesh; 374 struct ieee80211_mesh_route *rt, *next; 375 376 MESH_RT_LOCK(ms); 377 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 378 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 379 mesh_rt_del(ms, rt); 380 } 381 MESH_RT_UNLOCK(ms); 382} 383 384/* 385 * Flush expired routing entries, i.e. those in invalid state for 386 * some time. 387 */ 388static void 389mesh_rt_flush_invalid(struct ieee80211vap *vap) 390{ 391 struct ieee80211_mesh_state *ms = vap->iv_mesh; 392 struct ieee80211_mesh_route *rt, *next; 393 394 if (ms == NULL) 395 return; 396 MESH_RT_LOCK(ms); 397 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 398 ieee80211_mesh_rt_update(rt, 0); 399 /* 400 * NB: we check for lifetime == 0 so that we give a chance 401 * for route discovery to complete. 402 */ 403 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 && 404 rt->rt_lifetime == 0) 405 mesh_rt_del(ms, rt); 406 } 407 MESH_RT_UNLOCK(ms); 408} 409 410#define N(a) (sizeof(a) / sizeof(a[0])) 411int 412ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 413{ 414 int i, firstempty = -1; 415 416 for (i = 0; i < N(mesh_proto_paths); i++) { 417 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 418 IEEE80211_MESH_PROTO_DSZ) == 0) 419 return EEXIST; 420 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 421 firstempty = i; 422 } 423 if (firstempty < 0) 424 return ENOSPC; 425 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 426 mesh_proto_paths[firstempty].mpp_active = 1; 427 return 0; 428} 429 430int 431ieee80211_mesh_register_proto_metric(const struct 432 ieee80211_mesh_proto_metric *mpm) 433{ 434 int i, firstempty = -1; 435 436 for (i = 0; i < N(mesh_proto_metrics); i++) { 437 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 438 IEEE80211_MESH_PROTO_DSZ) == 0) 439 return EEXIST; 440 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 441 firstempty = i; 442 } 443 if (firstempty < 0) 444 return ENOSPC; 445 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 446 mesh_proto_metrics[firstempty].mpm_active = 1; 447 return 0; 448} 449 450static int 451mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 452{ 453 struct ieee80211_mesh_state *ms = vap->iv_mesh; 454 int i; 455 456 for (i = 0; i < N(mesh_proto_paths); i++) { 457 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 458 ms->ms_ppath = &mesh_proto_paths[i]; 459 return 0; 460 } 461 } 462 return ENOENT; 463} 464 465static int 466mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 467{ 468 struct ieee80211_mesh_state *ms = vap->iv_mesh; 469 int i; 470 471 for (i = 0; i < N(mesh_proto_metrics); i++) { 472 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 473 ms->ms_pmetric = &mesh_proto_metrics[i]; 474 return 0; 475 } 476 } 477 return ENOENT; 478} 479#undef N 480 481static void 482ieee80211_mesh_init(void) 483{ 484 485 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 486 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 487 488 /* 489 * Setup mesh parameters that depends on the clock frequency. 490 */ 491 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 492 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 493 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 494 495 /* 496 * Register action frame handlers. 497 */ 498 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 499 IEEE80211_ACTION_MESHPEERING_OPEN, 500 mesh_recv_action_meshpeering_open); 501 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 502 IEEE80211_ACTION_MESHPEERING_CONFIRM, 503 mesh_recv_action_meshpeering_confirm); 504 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 505 IEEE80211_ACTION_MESHPEERING_CLOSE, 506 mesh_recv_action_meshpeering_close); 507 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 508 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 509 510 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 511 IEEE80211_ACTION_MESHPEERING_OPEN, 512 mesh_send_action_meshpeering_open); 513 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 514 IEEE80211_ACTION_MESHPEERING_CONFIRM, 515 mesh_send_action_meshpeering_confirm); 516 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 517 IEEE80211_ACTION_MESHPEERING_CLOSE, 518 mesh_send_action_meshpeering_close); 519 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 520 IEEE80211_ACTION_MESH_LMETRIC, 521 mesh_send_action_meshlmetric); 522 523 /* 524 * Register Airtime Link Metric. 525 */ 526 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 527 528} 529SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 530 531void 532ieee80211_mesh_attach(struct ieee80211com *ic) 533{ 534 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 535} 536 537void 538ieee80211_mesh_detach(struct ieee80211com *ic) 539{ 540} 541 542static void 543mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 544{ 545 struct ieee80211com *ic = ni->ni_ic; 546 uint16_t args[3]; 547 548 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 549 args[0] = ni->ni_mlpid; 550 args[1] = ni->ni_mllid; 551 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 552 ieee80211_send_action(ni, 553 IEEE80211_ACTION_CAT_SELF_PROT, 554 IEEE80211_ACTION_MESHPEERING_CLOSE, 555 args); 556 } 557 callout_drain(&ni->ni_mltimer); 558 /* XXX belongs in hwmp */ 559 ieee80211_ageq_drain_node(&ic->ic_stageq, 560 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 561} 562 563static void 564mesh_vdetach(struct ieee80211vap *vap) 565{ 566 struct ieee80211_mesh_state *ms = vap->iv_mesh; 567 568 callout_drain(&ms->ms_cleantimer); 569 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 570 NULL); 571 ieee80211_mesh_rt_flush(vap); 572 mtx_destroy(&ms->ms_rt_lock); 573 ms->ms_ppath->mpp_vdetach(vap); 574 free(vap->iv_mesh, M_80211_VAP); 575 vap->iv_mesh = NULL; 576} 577 578static void 579mesh_vattach(struct ieee80211vap *vap) 580{ 581 struct ieee80211_mesh_state *ms; 582 vap->iv_newstate = mesh_newstate; 583 vap->iv_input = mesh_input; 584 vap->iv_opdetach = mesh_vdetach; 585 vap->iv_recv_mgmt = mesh_recv_mgmt; 586 vap->iv_recv_ctl = mesh_recv_ctl; 587 ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 588 M_NOWAIT | M_ZERO); 589 if (ms == NULL) { 590 printf("%s: couldn't alloc MBSS state\n", __func__); 591 return; 592 } 593 vap->iv_mesh = ms; 594 ms->ms_seq = 0; 595 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 596 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 597 TAILQ_INIT(&ms->ms_routes); 598 mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF); 599 callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE); 600 mesh_select_proto_metric(vap, "AIRTIME"); 601 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 602 mesh_select_proto_path(vap, "HWMP"); 603 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 604 ms->ms_ppath->mpp_vattach(vap); 605} 606 607/* 608 * IEEE80211_M_MBSS vap state machine handler. 609 */ 610static int 611mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 612{ 613 struct ieee80211_mesh_state *ms = vap->iv_mesh; 614 struct ieee80211com *ic = vap->iv_ic; 615 struct ieee80211_node *ni; 616 enum ieee80211_state ostate; 617 618 IEEE80211_LOCK_ASSERT(ic); 619 620 ostate = vap->iv_state; 621 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 622 __func__, ieee80211_state_name[ostate], 623 ieee80211_state_name[nstate], arg); 624 vap->iv_state = nstate; /* state transition */ 625 if (ostate != IEEE80211_S_SCAN) 626 ieee80211_cancel_scan(vap); /* background scan */ 627 ni = vap->iv_bss; /* NB: no reference held */ 628 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) 629 callout_drain(&ms->ms_cleantimer); 630 switch (nstate) { 631 case IEEE80211_S_INIT: 632 switch (ostate) { 633 case IEEE80211_S_SCAN: 634 ieee80211_cancel_scan(vap); 635 break; 636 case IEEE80211_S_CAC: 637 ieee80211_dfs_cac_stop(vap); 638 break; 639 case IEEE80211_S_RUN: 640 ieee80211_iterate_nodes(&ic->ic_sta, 641 mesh_vdetach_peers, NULL); 642 break; 643 default: 644 break; 645 } 646 if (ostate != IEEE80211_S_INIT) { 647 /* NB: optimize INIT -> INIT case */ 648 ieee80211_reset_bss(vap); 649 ieee80211_mesh_rt_flush(vap); 650 } 651 break; 652 case IEEE80211_S_SCAN: 653 switch (ostate) { 654 case IEEE80211_S_INIT: 655 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 656 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 657 ms->ms_idlen != 0) { 658 /* 659 * Already have a channel and a mesh ID; bypass 660 * the scan and startup immediately. 661 */ 662 ieee80211_create_ibss(vap, vap->iv_des_chan); 663 break; 664 } 665 /* 666 * Initiate a scan. We can come here as a result 667 * of an IEEE80211_IOC_SCAN_REQ too in which case 668 * the vap will be marked with IEEE80211_FEXT_SCANREQ 669 * and the scan request parameters will be present 670 * in iv_scanreq. Otherwise we do the default. 671 */ 672 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 673 ieee80211_check_scan(vap, 674 vap->iv_scanreq_flags, 675 vap->iv_scanreq_duration, 676 vap->iv_scanreq_mindwell, 677 vap->iv_scanreq_maxdwell, 678 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 679 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 680 } else 681 ieee80211_check_scan_current(vap); 682 break; 683 default: 684 break; 685 } 686 break; 687 case IEEE80211_S_CAC: 688 /* 689 * Start CAC on a DFS channel. We come here when starting 690 * a bss on a DFS channel (see ieee80211_create_ibss). 691 */ 692 ieee80211_dfs_cac_start(vap); 693 break; 694 case IEEE80211_S_RUN: 695 switch (ostate) { 696 case IEEE80211_S_INIT: 697 /* 698 * Already have a channel; bypass the 699 * scan and startup immediately. 700 * Note that ieee80211_create_ibss will call 701 * back to do a RUN->RUN state change. 702 */ 703 ieee80211_create_ibss(vap, 704 ieee80211_ht_adjust_channel(ic, 705 ic->ic_curchan, vap->iv_flags_ht)); 706 /* NB: iv_bss is changed on return */ 707 break; 708 case IEEE80211_S_CAC: 709 /* 710 * NB: This is the normal state change when CAC 711 * expires and no radar was detected; no need to 712 * clear the CAC timer as it's already expired. 713 */ 714 /* fall thru... */ 715 case IEEE80211_S_CSA: 716#if 0 717 /* 718 * Shorten inactivity timer of associated stations 719 * to weed out sta's that don't follow a CSA. 720 */ 721 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 722#endif 723 /* 724 * Update bss node channel to reflect where 725 * we landed after CSA. 726 */ 727 ieee80211_node_set_chan(vap->iv_bss, 728 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 729 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 730 /* XXX bypass debug msgs */ 731 break; 732 case IEEE80211_S_SCAN: 733 case IEEE80211_S_RUN: 734#ifdef IEEE80211_DEBUG 735 if (ieee80211_msg_debug(vap)) { 736 struct ieee80211_node *ni = vap->iv_bss; 737 ieee80211_note(vap, 738 "synchronized with %s meshid ", 739 ether_sprintf(ni->ni_meshid)); 740 ieee80211_print_essid(ni->ni_meshid, 741 ni->ni_meshidlen); 742 /* XXX MCS/HT */ 743 printf(" channel %d\n", 744 ieee80211_chan2ieee(ic, ic->ic_curchan)); 745 } 746#endif 747 break; 748 default: 749 break; 750 } 751 ieee80211_node_authorize(vap->iv_bss); 752 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 753 mesh_rt_cleanup_cb, vap); 754 break; 755 default: 756 break; 757 } 758 /* NB: ostate not nstate */ 759 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 760 return 0; 761} 762 763static void 764mesh_rt_cleanup_cb(void *arg) 765{ 766 struct ieee80211vap *vap = arg; 767 struct ieee80211_mesh_state *ms = vap->iv_mesh; 768 769 mesh_rt_flush_invalid(vap); 770 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 771 mesh_rt_cleanup_cb, vap); 772} 773 774 775/* 776 * Helper function to note the Mesh Peer Link FSM change. 777 */ 778static void 779mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 780{ 781 struct ieee80211vap *vap = ni->ni_vap; 782 struct ieee80211_mesh_state *ms = vap->iv_mesh; 783#ifdef IEEE80211_DEBUG 784 static const char *meshlinkstates[] = { 785 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 786 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 787 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 788 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 789 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 790 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 791 }; 792#endif 793 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 794 ni, "peer link: %s -> %s", 795 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 796 797 /* track neighbor count */ 798 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 799 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 800 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 801 ms->ms_neighbors++; 802 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 803 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 804 state != IEEE80211_NODE_MESH_ESTABLISHED) { 805 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 806 ms->ms_neighbors--; 807 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 808 } 809 ni->ni_mlstate = state; 810 switch (state) { 811 case IEEE80211_NODE_MESH_HOLDING: 812 ms->ms_ppath->mpp_peerdown(ni); 813 break; 814 case IEEE80211_NODE_MESH_ESTABLISHED: 815 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 816 break; 817 default: 818 break; 819 } 820} 821 822/* 823 * Helper function to generate a unique local ID required for mesh 824 * peer establishment. 825 */ 826static void 827mesh_checkid(void *arg, struct ieee80211_node *ni) 828{ 829 uint16_t *r = arg; 830 831 if (*r == ni->ni_mllid) 832 *(uint16_t *)arg = 0; 833} 834 835static uint32_t 836mesh_generateid(struct ieee80211vap *vap) 837{ 838 int maxiter = 4; 839 uint16_t r; 840 841 do { 842 get_random_bytes(&r, 2); 843 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 844 maxiter--; 845 } while (r == 0 && maxiter > 0); 846 return r; 847} 848 849/* 850 * Verifies if we already received this packet by checking its 851 * sequence number. 852 * Returns 0 if the frame is to be accepted, 1 otherwise. 853 */ 854static int 855mesh_checkpseq(struct ieee80211vap *vap, 856 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 857{ 858 struct ieee80211_mesh_route *rt; 859 860 rt = ieee80211_mesh_rt_find(vap, source); 861 if (rt == NULL) { 862 rt = ieee80211_mesh_rt_add(vap, source); 863 if (rt == NULL) { 864 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 865 "%s", "add mcast route failed"); 866 vap->iv_stats.is_mesh_rtaddfailed++; 867 return 1; 868 } 869 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 870 "add mcast route, mesh seqno %d", seq); 871 rt->rt_lastmseq = seq; 872 return 0; 873 } 874 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 875 return 1; 876 } else { 877 rt->rt_lastmseq = seq; 878 return 0; 879 } 880} 881 882/* 883 * Iterate the routing table and locate the next hop. 884 */ 885static struct ieee80211_node * 886mesh_find_txnode(struct ieee80211vap *vap, 887 const uint8_t dest[IEEE80211_ADDR_LEN]) 888{ 889 struct ieee80211_mesh_route *rt; 890 891 rt = ieee80211_mesh_rt_find(vap, dest); 892 if (rt == NULL) 893 return NULL; 894 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 || 895 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) { 896 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 897 "%s: !valid or proxy, flags 0x%x", __func__, rt->rt_flags); 898 /* XXX stat */ 899 return NULL; 900 } 901 return ieee80211_find_txnode(vap, rt->rt_nexthop); 902} 903 904/* 905 * Forward the specified frame. 906 * Decrement the TTL and set TA to our MAC address. 907 */ 908static void 909mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 910 const struct ieee80211_meshcntl *mc) 911{ 912 struct ieee80211com *ic = vap->iv_ic; 913 struct ieee80211_mesh_state *ms = vap->iv_mesh; 914 struct ifnet *ifp = vap->iv_ifp; 915 struct ifnet *parent = ic->ic_ifp; 916 const struct ieee80211_frame *wh = 917 mtod(m, const struct ieee80211_frame *); 918 struct mbuf *mcopy; 919 struct ieee80211_meshcntl *mccopy; 920 struct ieee80211_frame *whcopy; 921 struct ieee80211_node *ni; 922 int err; 923 924 /* 925 * mesh ttl of 1 means we are the last one receving it, 926 * according to amendment we decrement and then check if 927 * 0, if so we dont forward. 928 */ 929 if (mc->mc_ttl < 1) { 930 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 931 "%s", "frame not fwd'd, ttl 1"); 932 vap->iv_stats.is_mesh_fwd_ttl++; 933 return; 934 } 935 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 936 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 937 "%s", "frame not fwd'd, fwding disabled"); 938 vap->iv_stats.is_mesh_fwd_disabled++; 939 return; 940 } 941 mcopy = m_dup(m, M_DONTWAIT); 942 if (mcopy == NULL) { 943 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 944 "%s", "frame not fwd'd, cannot dup"); 945 vap->iv_stats.is_mesh_fwd_nobuf++; 946 ifp->if_oerrors++; 947 return; 948 } 949 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 950 sizeof(struct ieee80211_meshcntl)); 951 if (mcopy == NULL) { 952 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 953 "%s", "frame not fwd'd, too short"); 954 vap->iv_stats.is_mesh_fwd_tooshort++; 955 ifp->if_oerrors++; 956 m_freem(mcopy); 957 return; 958 } 959 whcopy = mtod(mcopy, struct ieee80211_frame *); 960 mccopy = (struct ieee80211_meshcntl *) 961 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 962 /* XXX clear other bits? */ 963 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 964 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 965 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 966 ni = ieee80211_ref_node(vap->iv_bss); 967 mcopy->m_flags |= M_MCAST; 968 } else { 969 ni = mesh_find_txnode(vap, whcopy->i_addr3); 970 if (ni == NULL) { 971 /* 972 * [Optional] any of the following three actions: 973 * o silently discard 974 * o trigger a path discovery 975 * o inform TA that meshDA is unreachable. 976 */ 977 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 978 "%s", "frame not fwd'd, no path"); 979 vap->iv_stats.is_mesh_fwd_nopath++; 980 m_freem(mcopy); 981 return; 982 } 983 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 984 } 985 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 986 mccopy->mc_ttl--; 987 988 /* XXX calculate priority so drivers can find the tx queue */ 989 M_WME_SETAC(mcopy, WME_AC_BE); 990 991 /* XXX do we know m_nextpkt is NULL? */ 992 mcopy->m_pkthdr.rcvif = (void *) ni; 993 err = parent->if_transmit(parent, mcopy); 994 if (err != 0) { 995 /* NB: IFQ_HANDOFF reclaims mbuf */ 996 ieee80211_free_node(ni); 997 } else { 998 ifp->if_opackets++; 999 } 1000} 1001 1002static struct mbuf * 1003mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1004{ 1005#define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1006#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1007 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1008 sizeof(struct ieee80211_meshcntl_ae10)]; 1009 const struct ieee80211_qosframe_addr4 *wh; 1010 const struct ieee80211_meshcntl_ae10 *mc; 1011 struct ether_header *eh; 1012 struct llc *llc; 1013 int ae; 1014 1015 if (m->m_len < hdrlen + sizeof(*llc) && 1016 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1017 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1018 "discard data frame: %s", "m_pullup failed"); 1019 vap->iv_stats.is_rx_tooshort++; 1020 return NULL; 1021 } 1022 memcpy(b, mtod(m, caddr_t), hdrlen); 1023 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1024 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1025 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1026 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1027 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1028 1029 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1030 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1031 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1032 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1033 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1034 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1035 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1036 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1037 llc = NULL; 1038 } else { 1039 m_adj(m, hdrlen - sizeof(*eh)); 1040 } 1041 eh = mtod(m, struct ether_header *); 1042 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1043 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1044 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1045 if (ae == IEEE80211_MESH_AE_00) { 1046 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1047 } else if (ae == IEEE80211_MESH_AE_01) { 1048 IEEE80211_ADDR_COPY(eh->ether_shost, 1049 MC01(mc)->mc_addr4); 1050 } else { 1051 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1052 (const struct ieee80211_frame *)wh, NULL, 1053 "bad AE %d", ae); 1054 vap->iv_stats.is_mesh_badae++; 1055 m_freem(m); 1056 return NULL; 1057 } 1058 } else { 1059 if (ae == IEEE80211_MESH_AE_00) { 1060 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1061 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1062 } else if (ae == IEEE80211_MESH_AE_10) { 1063 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1064 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1065 } else { 1066 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1067 (const struct ieee80211_frame *)wh, NULL, 1068 "bad AE %d", ae); 1069 vap->iv_stats.is_mesh_badae++; 1070 m_freem(m); 1071 return NULL; 1072 } 1073 } 1074#ifdef ALIGNED_POINTER 1075 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1076 m = ieee80211_realign(vap, m, sizeof(*eh)); 1077 if (m == NULL) 1078 return NULL; 1079 } 1080#endif /* ALIGNED_POINTER */ 1081 if (llc != NULL) { 1082 eh = mtod(m, struct ether_header *); 1083 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1084 } 1085 return m; 1086#undef WDIR 1087#undef MC01 1088} 1089 1090/* 1091 * Return non-zero if the unicast mesh data frame should be processed 1092 * locally. Frames that are not proxy'd have our address, otherwise 1093 * we need to consult the routing table to look for a proxy entry. 1094 */ 1095static __inline int 1096mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1097 const struct ieee80211_meshcntl *mc) 1098{ 1099 int ae = mc->mc_flags & 3; 1100 1101 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1102 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1103 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1104 ("bad AE %d", ae)); 1105 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1106 const struct ieee80211_meshcntl_ae10 *mc10 = 1107 (const struct ieee80211_meshcntl_ae10 *) mc; 1108 struct ieee80211_mesh_route *rt = 1109 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1110 /* check for proxy route to ourself */ 1111 return (rt != NULL && 1112 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1113 } else /* ucast w/o proxy */ 1114 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1115} 1116 1117/* 1118 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1119 * > 0 means we have forwarded data and no need to process locally 1120 * == 0 means we want to process locally (and we may have forwarded data 1121 * < 0 means there was an error and data should be discarded 1122 */ 1123static int 1124mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1125 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1126{ 1127 struct ieee80211_qosframe_addr4 *qwh; 1128 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1129 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1130 1131 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1132 1133 /* 1134 * TODO: 1135 * o verify addr2 is a legitimate transmitter 1136 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1137 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1138 */ 1139 1140 /* set lifetime of addr3 (meshDA) to initial value */ 1141 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1142 if (rt_meshda == NULL) { 1143 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1144 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1145 /* 1146 * [Optional] any of the following three actions: 1147 * o silently discard [X] 1148 * o trigger a path discovery [ ] 1149 * o inform TA that meshDA is unknown. [ ] 1150 */ 1151 /* XXX: stats */ 1152 return (-1); 1153 } 1154 1155 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1156 ms->ms_ppath->mpp_inact)); 1157 1158 /* set lifetime of addr4 (meshSA) to initial value */ 1159 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1160 KASSERT(rt_meshsa != NULL, ("no route")); 1161 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1162 ms->ms_ppath->mpp_inact)); 1163 1164 mesh_forward(vap, m, mc); 1165 return (1); /* dont process locally */ 1166} 1167 1168/* 1169 * Verifies transmitter, updates lifetime, precursor list and process data 1170 * locally, if data is is proxy with AE = 10 it could mean data should go 1171 * on another mesh path or data should be forwarded to the DS. 1172 * 1173 * > 0 means we have forwarded data and no need to process locally 1174 * == 0 means we want to process locally (and we may have forwarded data 1175 * < 0 means there was an error and data should be discarded 1176 */ 1177static int 1178mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1179 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1180{ 1181 struct ieee80211_qosframe_addr4 *qwh; 1182 const struct ieee80211_meshcntl_ae10 *mc10; 1183 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1184 struct ieee80211_mesh_route *rt; 1185 int ae; 1186 1187 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1188 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1189 1190 /* 1191 * TODO: 1192 * o verify addr2 is a legitimate transmitter 1193 * o lifetime of precursor entry is max(init, curr) 1194 */ 1195 1196 /* set lifetime of addr4 (meshSA) to initial value */ 1197 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1198 KASSERT(rt != NULL, ("no route")); 1199 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1200 rt = NULL; 1201 1202 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1203 KASSERT(ae == IEEE80211_MESH_AE_00 || 1204 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1205 if (ae == IEEE80211_MESH_AE_10) { 1206 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1207 return (0); /* process locally */ 1208 } 1209 1210 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1211 if (rt != NULL && 1212 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1213 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1214 /* 1215 * Forward on another mesh-path, according to 1216 * amendment as specified in 9.32.4.1 1217 */ 1218 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1219 mesh_forward(vap, m, 1220 (const struct ieee80211_meshcntl *)mc10); 1221 return (1); /* dont process locally */ 1222 } 1223 /* 1224 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1225 * addressed according to 13.11.3.2. 1226 */ 1227 } 1228 return (0); /* process locally */ 1229} 1230 1231/* 1232 * Try to forward the group addressed data on to other mesh STAs, and 1233 * also to the DS. 1234 * 1235 * > 0 means we have forwarded data and no need to process locally 1236 * == 0 means we want to process locally (and we may have forwarded data 1237 * < 0 means there was an error and data should be discarded 1238 */ 1239static int 1240mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1241 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1242{ 1243#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1244 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1245 1246 mesh_forward(vap, m, mc); 1247 1248 if(mc->mc_ttl > 0) { 1249 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1250 /* 1251 * Forward of MSDUs from the MBSS to DS group addressed 1252 * (according to 13.11.3.2) 1253 * This happens by delivering the packet, and a bridge 1254 * will sent it on another port member. 1255 */ 1256 if (ms->ms_flags & IEEE80211_MESHFLAGS_PORTAL && 1257 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1258 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1259 MC01(mc)->mc_addr4, "%s", 1260 "forward from MBSS to the DS"); 1261 } 1262 } 1263 return (0); /* process locally */ 1264#undef MC01 1265} 1266 1267static int 1268mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 1269{ 1270#define HAS_SEQ(type) ((type & 0x4) == 0) 1271#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1272#define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1273 struct ieee80211vap *vap = ni->ni_vap; 1274 struct ieee80211com *ic = ni->ni_ic; 1275 struct ifnet *ifp = vap->iv_ifp; 1276 struct ieee80211_frame *wh; 1277 const struct ieee80211_meshcntl *mc; 1278 int hdrspace, meshdrlen, need_tap, error; 1279 uint8_t dir, type, subtype, ae; 1280 uint32_t seq; 1281 const uint8_t *addr; 1282 uint8_t qos[2]; 1283 ieee80211_seq rxseq; 1284 1285 KASSERT(ni != NULL, ("null node")); 1286 ni->ni_inact = ni->ni_inact_reload; 1287 1288 need_tap = 1; /* mbuf need to be tapped. */ 1289 type = -1; /* undefined */ 1290 1291 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1292 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1293 ni->ni_macaddr, NULL, 1294 "too short (1): len %u", m->m_pkthdr.len); 1295 vap->iv_stats.is_rx_tooshort++; 1296 goto out; 1297 } 1298 /* 1299 * Bit of a cheat here, we use a pointer for a 3-address 1300 * frame format but don't reference fields past outside 1301 * ieee80211_frame_min w/o first validating the data is 1302 * present. 1303 */ 1304 wh = mtod(m, struct ieee80211_frame *); 1305 1306 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1307 IEEE80211_FC0_VERSION_0) { 1308 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1309 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1310 vap->iv_stats.is_rx_badversion++; 1311 goto err; 1312 } 1313 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1314 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1315 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1316 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1317 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1318 ni->ni_noise = nf; 1319 if (HAS_SEQ(type)) { 1320 uint8_t tid = ieee80211_gettid(wh); 1321 1322 if (IEEE80211_QOS_HAS_SEQ(wh) && 1323 TID_TO_WME_AC(tid) >= WME_AC_VI) 1324 ic->ic_wme.wme_hipri_traffic++; 1325 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1326 if (! ieee80211_check_rxseq(ni, wh)) { 1327 /* duplicate, discard */ 1328 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1329 wh->i_addr1, "duplicate", 1330 "seqno <%u,%u> fragno <%u,%u> tid %u", 1331 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1332 ni->ni_rxseqs[tid] >> 1333 IEEE80211_SEQ_SEQ_SHIFT, 1334 rxseq & IEEE80211_SEQ_FRAG_MASK, 1335 ni->ni_rxseqs[tid] & 1336 IEEE80211_SEQ_FRAG_MASK, 1337 tid); 1338 vap->iv_stats.is_rx_dup++; 1339 IEEE80211_NODE_STAT(ni, rx_dup); 1340 goto out; 1341 } 1342 ni->ni_rxseqs[tid] = rxseq; 1343 } 1344 } 1345#ifdef IEEE80211_DEBUG 1346 /* 1347 * It's easier, but too expensive, to simulate different mesh 1348 * topologies by consulting the ACL policy very early, so do this 1349 * only under DEBUG. 1350 * 1351 * NB: this check is also done upon peering link initiation. 1352 */ 1353 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1354 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1355 wh, NULL, "%s", "disallowed by ACL"); 1356 vap->iv_stats.is_rx_acl++; 1357 goto out; 1358 } 1359#endif 1360 switch (type) { 1361 case IEEE80211_FC0_TYPE_DATA: 1362 if (ni == vap->iv_bss) 1363 goto out; 1364 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1365 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1366 ni->ni_macaddr, NULL, 1367 "peer link not yet established (%d)", 1368 ni->ni_mlstate); 1369 vap->iv_stats.is_mesh_nolink++; 1370 goto out; 1371 } 1372 if (dir != IEEE80211_FC1_DIR_FROMDS && 1373 dir != IEEE80211_FC1_DIR_DSTODS) { 1374 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1375 wh, "data", "incorrect dir 0x%x", dir); 1376 vap->iv_stats.is_rx_wrongdir++; 1377 goto err; 1378 } 1379 1380 /* All Mesh data frames are QoS subtype */ 1381 if (!HAS_SEQ(type)) { 1382 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1383 wh, "data", "incorrect subtype 0x%x", subtype); 1384 vap->iv_stats.is_rx_badsubtype++; 1385 goto err; 1386 } 1387 1388 /* 1389 * Next up, any fragmentation. 1390 * XXX: we defrag before we even try to forward, 1391 * Mesh Control field is not present in sub-sequent 1392 * fragmented frames. This is in contrast to Draft 4.0. 1393 */ 1394 hdrspace = ieee80211_hdrspace(ic, wh); 1395 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1396 m = ieee80211_defrag(ni, m, hdrspace); 1397 if (m == NULL) { 1398 /* Fragment dropped or frame not complete yet */ 1399 goto out; 1400 } 1401 } 1402 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1403 1404 /* 1405 * Now we have a complete Mesh Data frame. 1406 */ 1407 1408 /* 1409 * Only fromDStoDS data frames use 4 address qos frames 1410 * as specified in amendment. Otherwise addr4 is located 1411 * in the Mesh Control field and a 3 address qos frame 1412 * is used. 1413 */ 1414 if (IEEE80211_IS_DSTODS(wh)) 1415 *(uint16_t *)qos = *(uint16_t *) 1416 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1417 else 1418 *(uint16_t *)qos = *(uint16_t *) 1419 ((struct ieee80211_qosframe *)wh)->i_qos; 1420 1421 /* 1422 * NB: The mesh STA sets the Mesh Control Present 1423 * subfield to 1 in the Mesh Data frame containing 1424 * an unfragmented MSDU, an A-MSDU, or the first 1425 * fragment of an MSDU. 1426 * After defrag it should always be present. 1427 */ 1428 if (!(qos[1] & IEEE80211_QOS_MC)) { 1429 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1430 ni->ni_macaddr, NULL, 1431 "%s", "Mesh control field not present"); 1432 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1433 goto err; 1434 } 1435 1436 /* pull up enough to get to the mesh control */ 1437 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1438 (m = m_pullup(m, hdrspace + 1439 sizeof(struct ieee80211_meshcntl))) == NULL) { 1440 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1441 ni->ni_macaddr, NULL, 1442 "data too short: expecting %u", hdrspace); 1443 vap->iv_stats.is_rx_tooshort++; 1444 goto out; /* XXX */ 1445 } 1446 /* 1447 * Now calculate the full extent of the headers. Note 1448 * mesh_decap will pull up anything we didn't get 1449 * above when it strips the 802.11 headers. 1450 */ 1451 mc = (const struct ieee80211_meshcntl *) 1452 (mtod(m, const uint8_t *) + hdrspace); 1453 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1454 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1455 ae * IEEE80211_ADDR_LEN; 1456 hdrspace += meshdrlen; 1457 1458 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1459 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1460 (m->m_len < hdrspace) && 1461 ((m = m_pullup(m, hdrspace)) == NULL)) { 1462 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1463 ni->ni_macaddr, NULL, 1464 "data too short: expecting %u", hdrspace); 1465 vap->iv_stats.is_rx_tooshort++; 1466 goto out; /* XXX */ 1467 } 1468 /* XXX: are we sure there is no reallocating after m_pullup? */ 1469 1470 seq = LE_READ_4(mc->mc_seq); 1471 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1472 addr = wh->i_addr3; 1473 else if (ae == IEEE80211_MESH_AE_01) 1474 addr = MC01(mc)->mc_addr4; 1475 else 1476 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1477 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1478 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1479 addr, "data", "%s", "not to me"); 1480 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1481 goto out; 1482 } 1483 if (mesh_checkpseq(vap, addr, seq) != 0) { 1484 vap->iv_stats.is_rx_dup++; 1485 goto out; 1486 } 1487 1488 /* This code "routes" the frame to the right control path */ 1489 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1490 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1491 error = 1492 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1493 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1494 error = mesh_recv_group_data(vap, m, wh, mc); 1495 else 1496 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1497 wh, mc); 1498 } else 1499 error = mesh_recv_group_data(vap, m, wh, mc); 1500 if (error < 0) 1501 goto err; 1502 else if (error > 0) 1503 goto out; 1504 1505 if (ieee80211_radiotap_active_vap(vap)) 1506 ieee80211_radiotap_rx(vap, m); 1507 need_tap = 0; 1508 1509 /* 1510 * Finally, strip the 802.11 header. 1511 */ 1512 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1513 if (m == NULL) { 1514 /* XXX mask bit to check for both */ 1515 /* don't count Null data frames as errors */ 1516 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1517 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1518 goto out; 1519 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1520 ni->ni_macaddr, "data", "%s", "decap error"); 1521 vap->iv_stats.is_rx_decap++; 1522 IEEE80211_NODE_STAT(ni, rx_decap); 1523 goto err; 1524 } 1525 if (qos[0] & IEEE80211_QOS_AMSDU) { 1526 m = ieee80211_decap_amsdu(ni, m); 1527 if (m == NULL) 1528 return IEEE80211_FC0_TYPE_DATA; 1529 } 1530 ieee80211_deliver_data(vap, ni, m); 1531 return type; 1532 case IEEE80211_FC0_TYPE_MGT: 1533 vap->iv_stats.is_rx_mgmt++; 1534 IEEE80211_NODE_STAT(ni, rx_mgmt); 1535 if (dir != IEEE80211_FC1_DIR_NODS) { 1536 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1537 wh, "mgt", "incorrect dir 0x%x", dir); 1538 vap->iv_stats.is_rx_wrongdir++; 1539 goto err; 1540 } 1541 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1542 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1543 ni->ni_macaddr, "mgt", "too short: len %u", 1544 m->m_pkthdr.len); 1545 vap->iv_stats.is_rx_tooshort++; 1546 goto out; 1547 } 1548#ifdef IEEE80211_DEBUG 1549 if ((ieee80211_msg_debug(vap) && 1550 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1551 ieee80211_msg_dumppkts(vap)) { 1552 if_printf(ifp, "received %s from %s rssi %d\n", 1553 ieee80211_mgt_subtype_name[subtype >> 1554 IEEE80211_FC0_SUBTYPE_SHIFT], 1555 ether_sprintf(wh->i_addr2), rssi); 1556 } 1557#endif 1558 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1559 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1560 wh, NULL, "%s", "WEP set but not permitted"); 1561 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1562 goto out; 1563 } 1564 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1565 goto out; 1566 case IEEE80211_FC0_TYPE_CTL: 1567 vap->iv_stats.is_rx_ctl++; 1568 IEEE80211_NODE_STAT(ni, rx_ctrl); 1569 goto out; 1570 default: 1571 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1572 wh, "bad", "frame type 0x%x", type); 1573 /* should not come here */ 1574 break; 1575 } 1576err: 1577 ifp->if_ierrors++; 1578out: 1579 if (m != NULL) { 1580 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1581 ieee80211_radiotap_rx(vap, m); 1582 m_freem(m); 1583 } 1584 return type; 1585#undef HAS_SEQ 1586#undef MC01 1587#undef MC10 1588} 1589 1590static void 1591mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1592 int rssi, int nf) 1593{ 1594 struct ieee80211vap *vap = ni->ni_vap; 1595 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1596 struct ieee80211com *ic = ni->ni_ic; 1597 struct ieee80211_frame *wh; 1598 struct ieee80211_mesh_route *rt; 1599 uint8_t *frm, *efrm; 1600 1601 wh = mtod(m0, struct ieee80211_frame *); 1602 frm = (uint8_t *)&wh[1]; 1603 efrm = mtod(m0, uint8_t *) + m0->m_len; 1604 switch (subtype) { 1605 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1606 case IEEE80211_FC0_SUBTYPE_BEACON: 1607 { 1608 struct ieee80211_scanparams scan; 1609 /* 1610 * We process beacon/probe response 1611 * frames to discover neighbors. 1612 */ 1613 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1614 return; 1615 /* 1616 * Count frame now that we know it's to be processed. 1617 */ 1618 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1619 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1620 IEEE80211_NODE_STAT(ni, rx_beacons); 1621 } else 1622 IEEE80211_NODE_STAT(ni, rx_proberesp); 1623 /* 1624 * If scanning, just pass information to the scan module. 1625 */ 1626 if (ic->ic_flags & IEEE80211_F_SCAN) { 1627 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1628 /* 1629 * Actively scanning a channel marked passive; 1630 * send a probe request now that we know there 1631 * is 802.11 traffic present. 1632 * 1633 * XXX check if the beacon we recv'd gives 1634 * us what we need and suppress the probe req 1635 */ 1636 ieee80211_probe_curchan(vap, 1); 1637 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1638 } 1639 ieee80211_add_scan(vap, &scan, wh, 1640 subtype, rssi, nf); 1641 return; 1642 } 1643 1644 /* The rest of this code assumes we are running */ 1645 if (vap->iv_state != IEEE80211_S_RUN) 1646 return; 1647 /* 1648 * Ignore non-mesh STAs. 1649 */ 1650 if ((scan.capinfo & 1651 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1652 scan.meshid == NULL || scan.meshconf == NULL) { 1653 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1654 wh, "beacon", "%s", "not a mesh sta"); 1655 vap->iv_stats.is_mesh_wrongmesh++; 1656 return; 1657 } 1658 /* 1659 * Ignore STAs for other mesh networks. 1660 */ 1661 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1662 mesh_verify_meshconf(vap, scan.meshconf)) { 1663 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1664 wh, "beacon", "%s", "not for our mesh"); 1665 vap->iv_stats.is_mesh_wrongmesh++; 1666 return; 1667 } 1668 /* 1669 * Peer only based on the current ACL policy. 1670 */ 1671 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1672 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1673 wh, NULL, "%s", "disallowed by ACL"); 1674 vap->iv_stats.is_rx_acl++; 1675 return; 1676 } 1677 /* 1678 * Do neighbor discovery. 1679 */ 1680 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1681 /* 1682 * Create a new entry in the neighbor table. 1683 */ 1684 ni = ieee80211_add_neighbor(vap, wh, &scan); 1685 } 1686 /* 1687 * Automatically peer with discovered nodes if possible. 1688 * XXX backoff on repeated failure 1689 */ 1690 if (ni != vap->iv_bss && 1691 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1692 switch (ni->ni_mlstate) { 1693 case IEEE80211_NODE_MESH_IDLE: 1694 { 1695 uint16_t args[1]; 1696 1697 ni->ni_mlpid = mesh_generateid(vap); 1698 if (ni->ni_mlpid == 0) 1699 return; 1700 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1701 args[0] = ni->ni_mlpid; 1702 ieee80211_send_action(ni, 1703 IEEE80211_ACTION_CAT_SELF_PROT, 1704 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1705 ni->ni_mlrcnt = 0; 1706 mesh_peer_timeout_setup(ni); 1707 break; 1708 } 1709 case IEEE80211_NODE_MESH_ESTABLISHED: 1710 { 1711 /* 1712 * Valid beacon from a peer mesh STA 1713 * bump TA lifetime 1714 */ 1715 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1716 if(rt != NULL) { 1717 ieee80211_mesh_rt_update(rt, 1718 ticks_to_msecs( 1719 ms->ms_ppath->mpp_inact)); 1720 } 1721 break; 1722 } 1723 default: 1724 break; /* ignore */ 1725 } 1726 } 1727 break; 1728 } 1729 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1730 { 1731 uint8_t *ssid, *meshid, *rates, *xrates; 1732 uint8_t *sfrm; 1733 1734 if (vap->iv_state != IEEE80211_S_RUN) { 1735 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1736 wh, NULL, "wrong state %s", 1737 ieee80211_state_name[vap->iv_state]); 1738 vap->iv_stats.is_rx_mgtdiscard++; 1739 return; 1740 } 1741 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1742 /* frame must be directed */ 1743 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1744 wh, NULL, "%s", "not unicast"); 1745 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1746 return; 1747 } 1748 /* 1749 * prreq frame format 1750 * [tlv] ssid 1751 * [tlv] supported rates 1752 * [tlv] extended supported rates 1753 * [tlv] mesh id 1754 */ 1755 ssid = meshid = rates = xrates = NULL; 1756 sfrm = frm; 1757 while (efrm - frm > 1) { 1758 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1759 switch (*frm) { 1760 case IEEE80211_ELEMID_SSID: 1761 ssid = frm; 1762 break; 1763 case IEEE80211_ELEMID_RATES: 1764 rates = frm; 1765 break; 1766 case IEEE80211_ELEMID_XRATES: 1767 xrates = frm; 1768 break; 1769 case IEEE80211_ELEMID_MESHID: 1770 meshid = frm; 1771 break; 1772 } 1773 frm += frm[1] + 2; 1774 } 1775 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1776 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1777 if (xrates != NULL) 1778 IEEE80211_VERIFY_ELEMENT(xrates, 1779 IEEE80211_RATE_MAXSIZE - rates[1], return); 1780 if (meshid != NULL) { 1781 IEEE80211_VERIFY_ELEMENT(meshid, 1782 IEEE80211_MESHID_LEN, return); 1783 /* NB: meshid, not ssid */ 1784 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 1785 } 1786 1787 /* XXX find a better class or define it's own */ 1788 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1789 "%s", "recv probe req"); 1790 /* 1791 * Some legacy 11b clients cannot hack a complete 1792 * probe response frame. When the request includes 1793 * only a bare-bones rate set, communicate this to 1794 * the transmit side. 1795 */ 1796 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 1797 break; 1798 } 1799 1800 case IEEE80211_FC0_SUBTYPE_ACTION: 1801 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 1802 if (ni == vap->iv_bss) { 1803 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1804 wh, NULL, "%s", "unknown node"); 1805 vap->iv_stats.is_rx_mgtdiscard++; 1806 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1807 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1808 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1809 wh, NULL, "%s", "not for us"); 1810 vap->iv_stats.is_rx_mgtdiscard++; 1811 } else if (vap->iv_state != IEEE80211_S_RUN) { 1812 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1813 wh, NULL, "wrong state %s", 1814 ieee80211_state_name[vap->iv_state]); 1815 vap->iv_stats.is_rx_mgtdiscard++; 1816 } else { 1817 if (ieee80211_parse_action(ni, m0) == 0) 1818 (void)ic->ic_recv_action(ni, wh, frm, efrm); 1819 } 1820 break; 1821 1822 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1823 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1824 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1825 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 1826 case IEEE80211_FC0_SUBTYPE_ATIM: 1827 case IEEE80211_FC0_SUBTYPE_DISASSOC: 1828 case IEEE80211_FC0_SUBTYPE_AUTH: 1829 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1830 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1831 wh, NULL, "%s", "not handled"); 1832 vap->iv_stats.is_rx_mgtdiscard++; 1833 break; 1834 1835 default: 1836 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1837 wh, "mgt", "subtype 0x%x not handled", subtype); 1838 vap->iv_stats.is_rx_badsubtype++; 1839 break; 1840 } 1841} 1842 1843static void 1844mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 1845{ 1846 1847 switch (subtype) { 1848 case IEEE80211_FC0_SUBTYPE_BAR: 1849 ieee80211_recv_bar(ni, m); 1850 break; 1851 } 1852} 1853 1854/* 1855 * Parse meshpeering action ie's for MPM frames 1856 */ 1857static const struct ieee80211_meshpeer_ie * 1858mesh_parse_meshpeering_action(struct ieee80211_node *ni, 1859 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 1860 const uint8_t *frm, const uint8_t *efrm, 1861 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 1862{ 1863 struct ieee80211vap *vap = ni->ni_vap; 1864 const struct ieee80211_meshpeer_ie *mpie; 1865 uint16_t args[3]; 1866 const uint8_t *meshid, *meshconf, *meshpeer; 1867 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 1868 1869 meshid = meshconf = meshpeer = NULL; 1870 while (efrm - frm > 1) { 1871 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 1872 switch (*frm) { 1873 case IEEE80211_ELEMID_MESHID: 1874 meshid = frm; 1875 break; 1876 case IEEE80211_ELEMID_MESHCONF: 1877 meshconf = frm; 1878 break; 1879 case IEEE80211_ELEMID_MESHPEER: 1880 meshpeer = frm; 1881 mpie = (const struct ieee80211_meshpeer_ie *) frm; 1882 memset(mp, 0, sizeof(*mp)); 1883 mp->peer_len = mpie->peer_len; 1884 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 1885 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 1886 switch (subtype) { 1887 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 1888 mp->peer_linkid = 1889 LE_READ_2(&mpie->peer_linkid); 1890 break; 1891 case IEEE80211_ACTION_MESHPEERING_CLOSE: 1892 /* NB: peer link ID is optional */ 1893 if (mpie->peer_len == 1894 (IEEE80211_MPM_BASE_SZ + 2)) { 1895 mp->peer_linkid = 0; 1896 mp->peer_rcode = 1897 LE_READ_2(&mpie->peer_linkid); 1898 } else { 1899 mp->peer_linkid = 1900 LE_READ_2(&mpie->peer_linkid); 1901 mp->peer_rcode = 1902 LE_READ_2(&mpie->peer_rcode); 1903 } 1904 break; 1905 } 1906 break; 1907 } 1908 frm += frm[1] + 2; 1909 } 1910 1911 /* 1912 * Verify the contents of the frame. 1913 * If it fails validation, close the peer link. 1914 */ 1915 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 1916 sendclose = 1; 1917 IEEE80211_DISCARD(vap, 1918 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1919 wh, NULL, "%s", "MPM validation failed"); 1920 } 1921 1922 /* If meshid is not the same reject any frames type. */ 1923 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 1924 sendclose = 1; 1925 IEEE80211_DISCARD(vap, 1926 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1927 wh, NULL, "%s", "not for our mesh"); 1928 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 1929 /* 1930 * Standard not clear about this, if we dont ignore 1931 * there will be an endless loop between nodes sending 1932 * CLOSE frames between each other with wrong meshid. 1933 * Discard and timers will bring FSM to IDLE state. 1934 */ 1935 return NULL; 1936 } 1937 } 1938 1939 /* 1940 * Close frames are accepted if meshid is the same. 1941 * Verify the other two types. 1942 */ 1943 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 1944 mesh_verify_meshconf(vap, meshconf)) { 1945 sendclose = 1; 1946 IEEE80211_DISCARD(vap, 1947 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1948 wh, NULL, "%s", "configuration missmatch"); 1949 } 1950 1951 if (sendclose) { 1952 vap->iv_stats.is_rx_mgtdiscard++; 1953 switch (ni->ni_mlstate) { 1954 case IEEE80211_NODE_MESH_IDLE: 1955 case IEEE80211_NODE_MESH_ESTABLISHED: 1956 case IEEE80211_NODE_MESH_HOLDING: 1957 /* ignore */ 1958 break; 1959 case IEEE80211_NODE_MESH_OPENSNT: 1960 case IEEE80211_NODE_MESH_OPENRCV: 1961 case IEEE80211_NODE_MESH_CONFIRMRCV: 1962 args[0] = ni->ni_mlpid; 1963 args[1] = ni->ni_mllid; 1964 /* Reason codes for rejection */ 1965 switch (subtype) { 1966 case IEEE80211_ACTION_MESHPEERING_OPEN: 1967 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 1968 break; 1969 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 1970 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 1971 break; 1972 } 1973 ieee80211_send_action(ni, 1974 IEEE80211_ACTION_CAT_SELF_PROT, 1975 IEEE80211_ACTION_MESHPEERING_CLOSE, 1976 args); 1977 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1978 mesh_peer_timeout_setup(ni); 1979 break; 1980 } 1981 return NULL; 1982 } 1983 1984 return (const struct ieee80211_meshpeer_ie *) mp; 1985} 1986 1987static int 1988mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 1989 const struct ieee80211_frame *wh, 1990 const uint8_t *frm, const uint8_t *efrm) 1991{ 1992 struct ieee80211vap *vap = ni->ni_vap; 1993 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1994 struct ieee80211_meshpeer_ie ie; 1995 const struct ieee80211_meshpeer_ie *meshpeer; 1996 uint16_t args[3]; 1997 1998 /* +2+2 for action + code + capabilites */ 1999 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2000 IEEE80211_ACTION_MESHPEERING_OPEN); 2001 if (meshpeer == NULL) { 2002 return 0; 2003 } 2004 2005 /* XXX move up */ 2006 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2007 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2008 2009 switch (ni->ni_mlstate) { 2010 case IEEE80211_NODE_MESH_IDLE: 2011 /* Reject open request if reached our maximum neighbor count */ 2012 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2013 args[0] = meshpeer->peer_llinkid; 2014 args[1] = 0; 2015 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2016 ieee80211_send_action(ni, 2017 IEEE80211_ACTION_CAT_SELF_PROT, 2018 IEEE80211_ACTION_MESHPEERING_CLOSE, 2019 args); 2020 /* stay in IDLE state */ 2021 return (0); 2022 } 2023 /* Open frame accepted */ 2024 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2025 ni->ni_mllid = meshpeer->peer_llinkid; 2026 ni->ni_mlpid = mesh_generateid(vap); 2027 if (ni->ni_mlpid == 0) 2028 return 0; /* XXX */ 2029 args[0] = ni->ni_mlpid; 2030 /* Announce we're open too... */ 2031 ieee80211_send_action(ni, 2032 IEEE80211_ACTION_CAT_SELF_PROT, 2033 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2034 /* ...and confirm the link. */ 2035 args[0] = ni->ni_mlpid; 2036 args[1] = ni->ni_mllid; 2037 ieee80211_send_action(ni, 2038 IEEE80211_ACTION_CAT_SELF_PROT, 2039 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2040 args); 2041 mesh_peer_timeout_setup(ni); 2042 break; 2043 case IEEE80211_NODE_MESH_OPENRCV: 2044 /* Wrong Link ID */ 2045 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2046 args[0] = ni->ni_mllid; 2047 args[1] = ni->ni_mlpid; 2048 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2049 ieee80211_send_action(ni, 2050 IEEE80211_ACTION_CAT_SELF_PROT, 2051 IEEE80211_ACTION_MESHPEERING_CLOSE, 2052 args); 2053 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2054 mesh_peer_timeout_setup(ni); 2055 break; 2056 } 2057 /* Duplicate open, confirm again. */ 2058 args[0] = ni->ni_mlpid; 2059 args[1] = ni->ni_mllid; 2060 ieee80211_send_action(ni, 2061 IEEE80211_ACTION_CAT_SELF_PROT, 2062 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2063 args); 2064 break; 2065 case IEEE80211_NODE_MESH_OPENSNT: 2066 ni->ni_mllid = meshpeer->peer_llinkid; 2067 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2068 args[0] = ni->ni_mlpid; 2069 args[1] = ni->ni_mllid; 2070 ieee80211_send_action(ni, 2071 IEEE80211_ACTION_CAT_SELF_PROT, 2072 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2073 args); 2074 /* NB: don't setup/clear any timeout */ 2075 break; 2076 case IEEE80211_NODE_MESH_CONFIRMRCV: 2077 if (ni->ni_mlpid != meshpeer->peer_linkid || 2078 ni->ni_mllid != meshpeer->peer_llinkid) { 2079 args[0] = ni->ni_mlpid; 2080 args[1] = ni->ni_mllid; 2081 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2082 ieee80211_send_action(ni, 2083 IEEE80211_ACTION_CAT_SELF_PROT, 2084 IEEE80211_ACTION_MESHPEERING_CLOSE, 2085 args); 2086 mesh_linkchange(ni, 2087 IEEE80211_NODE_MESH_HOLDING); 2088 mesh_peer_timeout_setup(ni); 2089 break; 2090 } 2091 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2092 ni->ni_mllid = meshpeer->peer_llinkid; 2093 args[0] = ni->ni_mlpid; 2094 args[1] = ni->ni_mllid; 2095 ieee80211_send_action(ni, 2096 IEEE80211_ACTION_CAT_SELF_PROT, 2097 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2098 args); 2099 mesh_peer_timeout_stop(ni); 2100 break; 2101 case IEEE80211_NODE_MESH_ESTABLISHED: 2102 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2103 args[0] = ni->ni_mllid; 2104 args[1] = ni->ni_mlpid; 2105 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2106 ieee80211_send_action(ni, 2107 IEEE80211_ACTION_CAT_SELF_PROT, 2108 IEEE80211_ACTION_MESHPEERING_CLOSE, 2109 args); 2110 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2111 mesh_peer_timeout_setup(ni); 2112 break; 2113 } 2114 args[0] = ni->ni_mlpid; 2115 args[1] = ni->ni_mllid; 2116 ieee80211_send_action(ni, 2117 IEEE80211_ACTION_CAT_SELF_PROT, 2118 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2119 args); 2120 break; 2121 case IEEE80211_NODE_MESH_HOLDING: 2122 args[0] = ni->ni_mlpid; 2123 args[1] = meshpeer->peer_llinkid; 2124 /* Standard not clear about what the reaason code should be */ 2125 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2126 ieee80211_send_action(ni, 2127 IEEE80211_ACTION_CAT_SELF_PROT, 2128 IEEE80211_ACTION_MESHPEERING_CLOSE, 2129 args); 2130 break; 2131 } 2132 return 0; 2133} 2134 2135static int 2136mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2137 const struct ieee80211_frame *wh, 2138 const uint8_t *frm, const uint8_t *efrm) 2139{ 2140 struct ieee80211vap *vap = ni->ni_vap; 2141 struct ieee80211_meshpeer_ie ie; 2142 const struct ieee80211_meshpeer_ie *meshpeer; 2143 uint16_t args[3]; 2144 2145 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2146 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2147 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2148 if (meshpeer == NULL) { 2149 return 0; 2150 } 2151 2152 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2153 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2154 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2155 2156 switch (ni->ni_mlstate) { 2157 case IEEE80211_NODE_MESH_OPENRCV: 2158 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2159 mesh_peer_timeout_stop(ni); 2160 break; 2161 case IEEE80211_NODE_MESH_OPENSNT: 2162 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2163 mesh_peer_timeout_setup(ni); 2164 break; 2165 case IEEE80211_NODE_MESH_HOLDING: 2166 args[0] = ni->ni_mlpid; 2167 args[1] = meshpeer->peer_llinkid; 2168 /* Standard not clear about what the reaason code should be */ 2169 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2170 ieee80211_send_action(ni, 2171 IEEE80211_ACTION_CAT_SELF_PROT, 2172 IEEE80211_ACTION_MESHPEERING_CLOSE, 2173 args); 2174 break; 2175 case IEEE80211_NODE_MESH_CONFIRMRCV: 2176 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2177 args[0] = ni->ni_mlpid; 2178 args[1] = ni->ni_mllid; 2179 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2180 ieee80211_send_action(ni, 2181 IEEE80211_ACTION_CAT_SELF_PROT, 2182 IEEE80211_ACTION_MESHPEERING_CLOSE, 2183 args); 2184 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2185 mesh_peer_timeout_setup(ni); 2186 } 2187 break; 2188 default: 2189 IEEE80211_DISCARD(vap, 2190 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2191 wh, NULL, "received confirm in invalid state %d", 2192 ni->ni_mlstate); 2193 vap->iv_stats.is_rx_mgtdiscard++; 2194 break; 2195 } 2196 return 0; 2197} 2198 2199static int 2200mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2201 const struct ieee80211_frame *wh, 2202 const uint8_t *frm, const uint8_t *efrm) 2203{ 2204 struct ieee80211_meshpeer_ie ie; 2205 const struct ieee80211_meshpeer_ie *meshpeer; 2206 uint16_t args[3]; 2207 2208 /* +2 for action + code */ 2209 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2210 IEEE80211_ACTION_MESHPEERING_CLOSE); 2211 if (meshpeer == NULL) { 2212 return 0; 2213 } 2214 2215 /* 2216 * XXX: check reason code, for example we could receive 2217 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2218 * to peer again. 2219 */ 2220 2221 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2222 ni, "%s", "recv PEER CLOSE"); 2223 2224 switch (ni->ni_mlstate) { 2225 case IEEE80211_NODE_MESH_IDLE: 2226 /* ignore */ 2227 break; 2228 case IEEE80211_NODE_MESH_OPENRCV: 2229 case IEEE80211_NODE_MESH_OPENSNT: 2230 case IEEE80211_NODE_MESH_CONFIRMRCV: 2231 case IEEE80211_NODE_MESH_ESTABLISHED: 2232 args[0] = ni->ni_mlpid; 2233 args[1] = ni->ni_mllid; 2234 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2235 ieee80211_send_action(ni, 2236 IEEE80211_ACTION_CAT_SELF_PROT, 2237 IEEE80211_ACTION_MESHPEERING_CLOSE, 2238 args); 2239 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2240 mesh_peer_timeout_setup(ni); 2241 break; 2242 case IEEE80211_NODE_MESH_HOLDING: 2243 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2244 mesh_peer_timeout_stop(ni); 2245 break; 2246 } 2247 return 0; 2248} 2249 2250/* 2251 * Link Metric handling. 2252 */ 2253static int 2254mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2255 const struct ieee80211_frame *wh, 2256 const uint8_t *frm, const uint8_t *efrm) 2257{ 2258 const struct ieee80211_meshlmetric_ie *ie = 2259 (const struct ieee80211_meshlmetric_ie *) 2260 (frm+2); /* action + code */ 2261 struct ieee80211_meshlmetric_ie lm_rep; 2262 2263 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2264 lm_rep.lm_flags = 0; 2265 lm_rep.lm_metric = mesh_airtime_calc(ni); 2266 ieee80211_send_action(ni, 2267 IEEE80211_ACTION_CAT_MESH, 2268 IEEE80211_ACTION_MESH_LMETRIC, 2269 &lm_rep); 2270 } 2271 /* XXX: else do nothing for now */ 2272 return 0; 2273} 2274 2275static int 2276mesh_send_action(struct ieee80211_node *ni, struct mbuf *m) 2277{ 2278 struct ieee80211_bpf_params params; 2279 2280 memset(¶ms, 0, sizeof(params)); 2281 params.ibp_pri = WME_AC_VO; 2282 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2283 /* XXX ucast/mcast */ 2284 params.ibp_try0 = ni->ni_txparms->maxretry; 2285 params.ibp_power = ni->ni_txpower; 2286 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION, 2287 ¶ms); 2288} 2289 2290#define ADDSHORT(frm, v) do { \ 2291 frm[0] = (v) & 0xff; \ 2292 frm[1] = (v) >> 8; \ 2293 frm += 2; \ 2294} while (0) 2295#define ADDWORD(frm, v) do { \ 2296 frm[0] = (v) & 0xff; \ 2297 frm[1] = ((v) >> 8) & 0xff; \ 2298 frm[2] = ((v) >> 16) & 0xff; \ 2299 frm[3] = ((v) >> 24) & 0xff; \ 2300 frm += 4; \ 2301} while (0) 2302 2303static int 2304mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2305 int category, int action, void *args0) 2306{ 2307 struct ieee80211vap *vap = ni->ni_vap; 2308 struct ieee80211com *ic = ni->ni_ic; 2309 uint16_t *args = args0; 2310 const struct ieee80211_rateset *rs; 2311 struct mbuf *m; 2312 uint8_t *frm; 2313 2314 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2315 "send PEER OPEN action: localid 0x%x", args[0]); 2316 2317 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2318 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2319 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2320 ieee80211_ref_node(ni); 2321 2322 m = ieee80211_getmgtframe(&frm, 2323 ic->ic_headroom + sizeof(struct ieee80211_frame), 2324 sizeof(uint16_t) /* action+category */ 2325 + sizeof(uint16_t) /* capabilites */ 2326 + 2 + IEEE80211_RATE_SIZE 2327 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2328 + 2 + IEEE80211_MESHID_LEN 2329 + sizeof(struct ieee80211_meshconf_ie) 2330 + sizeof(struct ieee80211_meshpeer_ie) 2331 ); 2332 if (m != NULL) { 2333 /* 2334 * mesh peer open action frame format: 2335 * [1] category 2336 * [1] action 2337 * [2] capabilities 2338 * [tlv] rates 2339 * [tlv] xrates 2340 * [tlv] mesh id 2341 * [tlv] mesh conf 2342 * [tlv] mesh peer link mgmt 2343 */ 2344 *frm++ = category; 2345 *frm++ = action; 2346 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2347 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2348 frm = ieee80211_add_rates(frm, rs); 2349 frm = ieee80211_add_xrates(frm, rs); 2350 frm = ieee80211_add_meshid(frm, vap); 2351 frm = ieee80211_add_meshconf(frm, vap); 2352 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2353 args[0], 0, 0); 2354 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2355 return mesh_send_action(ni, m); 2356 } else { 2357 vap->iv_stats.is_tx_nobuf++; 2358 ieee80211_free_node(ni); 2359 return ENOMEM; 2360 } 2361} 2362 2363static int 2364mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2365 int category, int action, void *args0) 2366{ 2367 struct ieee80211vap *vap = ni->ni_vap; 2368 struct ieee80211com *ic = ni->ni_ic; 2369 uint16_t *args = args0; 2370 const struct ieee80211_rateset *rs; 2371 struct mbuf *m; 2372 uint8_t *frm; 2373 2374 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2375 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2376 args[0], args[1]); 2377 2378 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2379 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2380 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2381 ieee80211_ref_node(ni); 2382 2383 m = ieee80211_getmgtframe(&frm, 2384 ic->ic_headroom + sizeof(struct ieee80211_frame), 2385 sizeof(uint16_t) /* action+category */ 2386 + sizeof(uint16_t) /* capabilites */ 2387 + sizeof(uint16_t) /* status code */ 2388 + sizeof(uint16_t) /* AID */ 2389 + 2 + IEEE80211_RATE_SIZE 2390 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2391 + 2 + IEEE80211_MESHID_LEN 2392 + sizeof(struct ieee80211_meshconf_ie) 2393 + sizeof(struct ieee80211_meshpeer_ie) 2394 ); 2395 if (m != NULL) { 2396 /* 2397 * mesh peer confirm action frame format: 2398 * [1] category 2399 * [1] action 2400 * [2] capabilities 2401 * [2] status code 2402 * [2] association id (peer ID) 2403 * [tlv] rates 2404 * [tlv] xrates 2405 * [tlv] mesh id 2406 * [tlv] mesh conf 2407 * [tlv] mesh peer link mgmt 2408 */ 2409 *frm++ = category; 2410 *frm++ = action; 2411 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2412 ADDSHORT(frm, 0); /* status code */ 2413 ADDSHORT(frm, args[1]); /* AID */ 2414 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2415 frm = ieee80211_add_rates(frm, rs); 2416 frm = ieee80211_add_xrates(frm, rs); 2417 frm = ieee80211_add_meshid(frm, vap); 2418 frm = ieee80211_add_meshconf(frm, vap); 2419 frm = ieee80211_add_meshpeer(frm, 2420 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2421 args[0], args[1], 0); 2422 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2423 return mesh_send_action(ni, m); 2424 } else { 2425 vap->iv_stats.is_tx_nobuf++; 2426 ieee80211_free_node(ni); 2427 return ENOMEM; 2428 } 2429} 2430 2431static int 2432mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2433 int category, int action, void *args0) 2434{ 2435 struct ieee80211vap *vap = ni->ni_vap; 2436 struct ieee80211com *ic = ni->ni_ic; 2437 uint16_t *args = args0; 2438 struct mbuf *m; 2439 uint8_t *frm; 2440 2441 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2442 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2443 args[0], args[1], args[2]); 2444 2445 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2446 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2447 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2448 ieee80211_ref_node(ni); 2449 2450 m = ieee80211_getmgtframe(&frm, 2451 ic->ic_headroom + sizeof(struct ieee80211_frame), 2452 sizeof(uint16_t) /* action+category */ 2453 + sizeof(uint16_t) /* reason code */ 2454 + 2 + IEEE80211_MESHID_LEN 2455 + sizeof(struct ieee80211_meshpeer_ie) 2456 ); 2457 if (m != NULL) { 2458 /* 2459 * mesh peer close action frame format: 2460 * [1] category 2461 * [1] action 2462 * [tlv] mesh id 2463 * [tlv] mesh peer link mgmt 2464 */ 2465 *frm++ = category; 2466 *frm++ = action; 2467 frm = ieee80211_add_meshid(frm, vap); 2468 frm = ieee80211_add_meshpeer(frm, 2469 IEEE80211_ACTION_MESHPEERING_CLOSE, 2470 args[0], args[1], args[2]); 2471 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2472 return mesh_send_action(ni, m); 2473 } else { 2474 vap->iv_stats.is_tx_nobuf++; 2475 ieee80211_free_node(ni); 2476 return ENOMEM; 2477 } 2478} 2479 2480static int 2481mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2482 int category, int action, void *arg0) 2483{ 2484 struct ieee80211vap *vap = ni->ni_vap; 2485 struct ieee80211com *ic = ni->ni_ic; 2486 struct ieee80211_meshlmetric_ie *ie = arg0; 2487 struct mbuf *m; 2488 uint8_t *frm; 2489 2490 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2491 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2492 ni, "%s", "send LINK METRIC REQUEST action"); 2493 } else { 2494 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2495 ni, "send LINK METRIC REPLY action: metric 0x%x", 2496 ie->lm_metric); 2497 } 2498 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2499 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2500 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2501 ieee80211_ref_node(ni); 2502 2503 m = ieee80211_getmgtframe(&frm, 2504 ic->ic_headroom + sizeof(struct ieee80211_frame), 2505 sizeof(uint16_t) + /* action+category */ 2506 sizeof(struct ieee80211_meshlmetric_ie) 2507 ); 2508 if (m != NULL) { 2509 /* 2510 * mesh link metric 2511 * [1] category 2512 * [1] action 2513 * [tlv] mesh link metric 2514 */ 2515 *frm++ = category; 2516 *frm++ = action; 2517 frm = ieee80211_add_meshlmetric(frm, 2518 ie->lm_flags, ie->lm_metric); 2519 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2520 return mesh_send_action(ni, m); 2521 } else { 2522 vap->iv_stats.is_tx_nobuf++; 2523 ieee80211_free_node(ni); 2524 return ENOMEM; 2525 } 2526} 2527 2528static void 2529mesh_peer_timeout_setup(struct ieee80211_node *ni) 2530{ 2531 switch (ni->ni_mlstate) { 2532 case IEEE80211_NODE_MESH_HOLDING: 2533 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 2534 break; 2535 case IEEE80211_NODE_MESH_CONFIRMRCV: 2536 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 2537 break; 2538 case IEEE80211_NODE_MESH_IDLE: 2539 ni->ni_mltval = 0; 2540 break; 2541 default: 2542 ni->ni_mltval = ieee80211_mesh_retrytimeout; 2543 break; 2544 } 2545 if (ni->ni_mltval) 2546 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2547 mesh_peer_timeout_cb, ni); 2548} 2549 2550/* 2551 * Same as above but backoffs timer statisically 50%. 2552 */ 2553static void 2554mesh_peer_timeout_backoff(struct ieee80211_node *ni) 2555{ 2556 uint32_t r; 2557 2558 r = arc4random(); 2559 ni->ni_mltval += r % ni->ni_mltval; 2560 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 2561 ni); 2562} 2563 2564static __inline void 2565mesh_peer_timeout_stop(struct ieee80211_node *ni) 2566{ 2567 callout_drain(&ni->ni_mltimer); 2568} 2569 2570/* 2571 * Mesh Peer Link Management FSM timeout handling. 2572 */ 2573static void 2574mesh_peer_timeout_cb(void *arg) 2575{ 2576 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 2577 uint16_t args[3]; 2578 2579 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 2580 ni, "mesh link timeout, state %d, retry counter %d", 2581 ni->ni_mlstate, ni->ni_mlrcnt); 2582 2583 switch (ni->ni_mlstate) { 2584 case IEEE80211_NODE_MESH_IDLE: 2585 case IEEE80211_NODE_MESH_ESTABLISHED: 2586 break; 2587 case IEEE80211_NODE_MESH_OPENSNT: 2588 case IEEE80211_NODE_MESH_OPENRCV: 2589 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 2590 args[0] = ni->ni_mlpid; 2591 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 2592 ieee80211_send_action(ni, 2593 IEEE80211_ACTION_CAT_SELF_PROT, 2594 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2595 ni->ni_mlrcnt = 0; 2596 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2597 mesh_peer_timeout_setup(ni); 2598 } else { 2599 args[0] = ni->ni_mlpid; 2600 ieee80211_send_action(ni, 2601 IEEE80211_ACTION_CAT_SELF_PROT, 2602 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2603 ni->ni_mlrcnt++; 2604 mesh_peer_timeout_backoff(ni); 2605 } 2606 break; 2607 case IEEE80211_NODE_MESH_CONFIRMRCV: 2608 args[0] = ni->ni_mlpid; 2609 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 2610 ieee80211_send_action(ni, 2611 IEEE80211_ACTION_CAT_SELF_PROT, 2612 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2613 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2614 mesh_peer_timeout_setup(ni); 2615 break; 2616 case IEEE80211_NODE_MESH_HOLDING: 2617 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2618 break; 2619 } 2620} 2621 2622static int 2623mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 2624{ 2625 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2626 2627 if (ie == NULL || ie[1] != ms->ms_idlen) 2628 return 1; 2629 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 2630} 2631 2632/* 2633 * Check if we are using the same algorithms for this mesh. 2634 */ 2635static int 2636mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 2637{ 2638 const struct ieee80211_meshconf_ie *meshconf = 2639 (const struct ieee80211_meshconf_ie *) ie; 2640 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 2641 2642 if (meshconf == NULL) 2643 return 1; 2644 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 2645 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2646 "unknown path selection algorithm: 0x%x\n", 2647 meshconf->conf_pselid); 2648 return 1; 2649 } 2650 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 2651 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2652 "unknown path metric algorithm: 0x%x\n", 2653 meshconf->conf_pmetid); 2654 return 1; 2655 } 2656 if (meshconf->conf_ccid != 0) { 2657 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2658 "unknown congestion control algorithm: 0x%x\n", 2659 meshconf->conf_ccid); 2660 return 1; 2661 } 2662 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 2663 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2664 "unknown sync algorithm: 0x%x\n", 2665 meshconf->conf_syncid); 2666 return 1; 2667 } 2668 if (meshconf->conf_authid != 0) { 2669 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2670 "unknown auth auth algorithm: 0x%x\n", 2671 meshconf->conf_pselid); 2672 return 1; 2673 } 2674 /* Not accepting peers */ 2675 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 2676 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2677 "not accepting peers: 0x%x\n", meshconf->conf_cap); 2678 return 1; 2679 } 2680 return 0; 2681} 2682 2683static int 2684mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 2685 const uint8_t *ie) 2686{ 2687 const struct ieee80211_meshpeer_ie *meshpeer = 2688 (const struct ieee80211_meshpeer_ie *) ie; 2689 2690 if (meshpeer == NULL || 2691 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 2692 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 2693 return 1; 2694 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 2695 IEEE80211_DPRINTF(vap, 2696 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2697 "Only MPM protocol is supported (proto: 0x%02X)", 2698 meshpeer->peer_proto); 2699 return 1; 2700 } 2701 switch (subtype) { 2702 case IEEE80211_ACTION_MESHPEERING_OPEN: 2703 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 2704 return 1; 2705 break; 2706 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2707 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 2708 return 1; 2709 break; 2710 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2711 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 2712 return 1; 2713 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 2714 meshpeer->peer_linkid != 0) 2715 return 1; 2716 if (meshpeer->peer_rcode == 0) 2717 return 1; 2718 break; 2719 } 2720 return 0; 2721} 2722 2723/* 2724 * Add a Mesh ID IE to a frame. 2725 */ 2726uint8_t * 2727ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 2728{ 2729 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2730 2731 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 2732 2733 *frm++ = IEEE80211_ELEMID_MESHID; 2734 *frm++ = ms->ms_idlen; 2735 memcpy(frm, ms->ms_id, ms->ms_idlen); 2736 return frm + ms->ms_idlen; 2737} 2738 2739/* 2740 * Add a Mesh Configuration IE to a frame. 2741 * For now just use HWMP routing, Airtime link metric, Null Congestion 2742 * Signaling, Null Sync Protocol and Null Authentication. 2743 */ 2744uint8_t * 2745ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 2746{ 2747 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 2748 uint16_t caps; 2749 2750 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 2751 2752 *frm++ = IEEE80211_ELEMID_MESHCONF; 2753 *frm++ = IEEE80211_MESH_CONF_SZ; 2754 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 2755 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 2756 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 2757 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 2758 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 2759 /* NB: set the number of neighbors before the rest */ 2760 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 2761 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 2762 if (ms->ms_flags & IEEE80211_MESHFLAGS_PORTAL) 2763 *frm |= IEEE80211_MESHCONF_FORM_MP; 2764 frm += 1; 2765 caps = 0; 2766 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 2767 caps |= IEEE80211_MESHCONF_CAP_AP; 2768 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 2769 caps |= IEEE80211_MESHCONF_CAP_FWRD; 2770 *frm++ = caps; 2771 return frm; 2772} 2773 2774/* 2775 * Add a Mesh Peer Management IE to a frame. 2776 */ 2777uint8_t * 2778ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 2779 uint16_t peerid, uint16_t reason) 2780{ 2781 2782 KASSERT(localid != 0, ("localid == 0")); 2783 2784 *frm++ = IEEE80211_ELEMID_MESHPEER; 2785 switch (subtype) { 2786 case IEEE80211_ACTION_MESHPEERING_OPEN: 2787 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 2788 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 2789 ADDSHORT(frm, localid); /* local ID */ 2790 break; 2791 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2792 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 2793 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 2794 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 2795 ADDSHORT(frm, localid); /* local ID */ 2796 ADDSHORT(frm, peerid); /* peer ID */ 2797 break; 2798 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2799 if (peerid) 2800 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 2801 else 2802 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 2803 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 2804 ADDSHORT(frm, localid); /* local ID */ 2805 if (peerid) 2806 ADDSHORT(frm, peerid); /* peer ID */ 2807 ADDSHORT(frm, reason); 2808 break; 2809 } 2810 return frm; 2811} 2812 2813/* 2814 * Compute an Airtime Link Metric for the link with this node. 2815 * 2816 * Based on Draft 3.0 spec (11B.10, p.149). 2817 */ 2818/* 2819 * Max 802.11s overhead. 2820 */ 2821#define IEEE80211_MESH_MAXOVERHEAD \ 2822 (sizeof(struct ieee80211_qosframe_addr4) \ 2823 + sizeof(struct ieee80211_meshcntl_ae10) \ 2824 + sizeof(struct llc) \ 2825 + IEEE80211_ADDR_LEN \ 2826 + IEEE80211_WEP_IVLEN \ 2827 + IEEE80211_WEP_KIDLEN \ 2828 + IEEE80211_WEP_CRCLEN \ 2829 + IEEE80211_WEP_MICLEN \ 2830 + IEEE80211_CRC_LEN) 2831uint32_t 2832mesh_airtime_calc(struct ieee80211_node *ni) 2833{ 2834#define M_BITS 8 2835#define S_FACTOR (2 * M_BITS) 2836 struct ieee80211com *ic = ni->ni_ic; 2837 struct ifnet *ifp = ni->ni_vap->iv_ifp; 2838 const static int nbits = 8192 << M_BITS; 2839 uint32_t overhead, rate, errrate; 2840 uint64_t res; 2841 2842 /* Time to transmit a frame */ 2843 rate = ni->ni_txrate; 2844 overhead = ieee80211_compute_duration(ic->ic_rt, 2845 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 2846 /* Error rate in percentage */ 2847 /* XXX assuming small failures are ok */ 2848 errrate = (((ifp->if_oerrors + 2849 ifp->if_ierrors) / 100) << M_BITS) / 100; 2850 res = (overhead + (nbits / rate)) * 2851 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 2852 2853 return (uint32_t)(res >> S_FACTOR); 2854#undef M_BITS 2855#undef S_FACTOR 2856} 2857 2858/* 2859 * Add a Mesh Link Metric report IE to a frame. 2860 */ 2861uint8_t * 2862ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 2863{ 2864 *frm++ = IEEE80211_ELEMID_MESHLINK; 2865 *frm++ = 5; 2866 *frm++ = flags; 2867 ADDWORD(frm, metric); 2868 return frm; 2869} 2870#undef ADDSHORT 2871#undef ADDWORD 2872 2873/* 2874 * Initialize any mesh-specific node state. 2875 */ 2876void 2877ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 2878{ 2879 ni->ni_flags |= IEEE80211_NODE_QOS; 2880 callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE); 2881} 2882 2883/* 2884 * Cleanup any mesh-specific node state. 2885 */ 2886void 2887ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 2888{ 2889 struct ieee80211vap *vap = ni->ni_vap; 2890 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2891 2892 callout_drain(&ni->ni_mltimer); 2893 /* NB: short-circuit callbacks after mesh_vdetach */ 2894 if (vap->iv_mesh != NULL) 2895 ms->ms_ppath->mpp_peerdown(ni); 2896} 2897 2898void 2899ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 2900{ 2901 ni->ni_meshidlen = ie[1]; 2902 memcpy(ni->ni_meshid, ie + 2, ie[1]); 2903} 2904 2905/* 2906 * Setup mesh-specific node state on neighbor discovery. 2907 */ 2908void 2909ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 2910 const struct ieee80211_frame *wh, 2911 const struct ieee80211_scanparams *sp) 2912{ 2913 ieee80211_parse_meshid(ni, sp->meshid); 2914} 2915 2916void 2917ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 2918 struct ieee80211_beacon_offsets *bo) 2919{ 2920 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 2921 2922 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 2923 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 2924 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 2925 } 2926} 2927 2928static int 2929mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 2930{ 2931 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2932 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 2933 struct ieee80211_mesh_route *rt; 2934 struct ieee80211req_mesh_route *imr; 2935 size_t len, off; 2936 uint8_t *p; 2937 int error; 2938 2939 if (vap->iv_opmode != IEEE80211_M_MBSS) 2940 return ENOSYS; 2941 2942 error = 0; 2943 switch (ireq->i_type) { 2944 case IEEE80211_IOC_MESH_ID: 2945 ireq->i_len = ms->ms_idlen; 2946 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 2947 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 2948 break; 2949 case IEEE80211_IOC_MESH_AP: 2950 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 2951 break; 2952 case IEEE80211_IOC_MESH_FWRD: 2953 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 2954 break; 2955 case IEEE80211_IOC_MESH_TTL: 2956 ireq->i_val = ms->ms_ttl; 2957 break; 2958 case IEEE80211_IOC_MESH_RTCMD: 2959 switch (ireq->i_val) { 2960 case IEEE80211_MESH_RTCMD_LIST: 2961 len = 0; 2962 MESH_RT_LOCK(ms); 2963 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 2964 len += sizeof(*imr); 2965 } 2966 MESH_RT_UNLOCK(ms); 2967 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 2968 ireq->i_len = len; 2969 return ENOMEM; 2970 } 2971 ireq->i_len = len; 2972 /* XXX M_WAIT? */ 2973 p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO); 2974 if (p == NULL) 2975 return ENOMEM; 2976 off = 0; 2977 MESH_RT_LOCK(ms); 2978 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 2979 if (off >= len) 2980 break; 2981 imr = (struct ieee80211req_mesh_route *) 2982 (p + off); 2983 IEEE80211_ADDR_COPY(imr->imr_dest, 2984 rt->rt_dest); 2985 IEEE80211_ADDR_COPY(imr->imr_nexthop, 2986 rt->rt_nexthop); 2987 imr->imr_metric = rt->rt_metric; 2988 imr->imr_nhops = rt->rt_nhops; 2989 imr->imr_lifetime = 2990 ieee80211_mesh_rt_update(rt, 0); 2991 imr->imr_lastmseq = rt->rt_lastmseq; 2992 imr->imr_flags = rt->rt_flags; /* last */ 2993 off += sizeof(*imr); 2994 } 2995 MESH_RT_UNLOCK(ms); 2996 error = copyout(p, (uint8_t *)ireq->i_data, 2997 ireq->i_len); 2998 free(p, M_TEMP); 2999 break; 3000 case IEEE80211_MESH_RTCMD_FLUSH: 3001 case IEEE80211_MESH_RTCMD_ADD: 3002 case IEEE80211_MESH_RTCMD_DELETE: 3003 return EINVAL; 3004 default: 3005 return ENOSYS; 3006 } 3007 break; 3008 case IEEE80211_IOC_MESH_PR_METRIC: 3009 len = strlen(ms->ms_pmetric->mpm_descr); 3010 if (ireq->i_len < len) 3011 return EINVAL; 3012 ireq->i_len = len; 3013 error = copyout(ms->ms_pmetric->mpm_descr, 3014 (uint8_t *)ireq->i_data, len); 3015 break; 3016 case IEEE80211_IOC_MESH_PR_PATH: 3017 len = strlen(ms->ms_ppath->mpp_descr); 3018 if (ireq->i_len < len) 3019 return EINVAL; 3020 ireq->i_len = len; 3021 error = copyout(ms->ms_ppath->mpp_descr, 3022 (uint8_t *)ireq->i_data, len); 3023 break; 3024 default: 3025 return ENOSYS; 3026 } 3027 3028 return error; 3029} 3030IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3031 3032static int 3033mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3034{ 3035 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3036 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3037 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3038 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3039 int error; 3040 3041 if (vap->iv_opmode != IEEE80211_M_MBSS) 3042 return ENOSYS; 3043 3044 error = 0; 3045 switch (ireq->i_type) { 3046 case IEEE80211_IOC_MESH_ID: 3047 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3048 return EINVAL; 3049 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3050 if (error != 0) 3051 break; 3052 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3053 ms->ms_idlen = ireq->i_len; 3054 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3055 error = ENETRESET; 3056 break; 3057 case IEEE80211_IOC_MESH_AP: 3058 if (ireq->i_val) 3059 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3060 else 3061 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3062 error = ENETRESET; 3063 break; 3064 case IEEE80211_IOC_MESH_FWRD: 3065 if (ireq->i_val) 3066 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3067 else 3068 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3069 break; 3070 case IEEE80211_IOC_MESH_TTL: 3071 ms->ms_ttl = (uint8_t) ireq->i_val; 3072 break; 3073 case IEEE80211_IOC_MESH_RTCMD: 3074 switch (ireq->i_val) { 3075 case IEEE80211_MESH_RTCMD_LIST: 3076 return EINVAL; 3077 case IEEE80211_MESH_RTCMD_FLUSH: 3078 ieee80211_mesh_rt_flush(vap); 3079 break; 3080 case IEEE80211_MESH_RTCMD_ADD: 3081 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3082 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3083 return EINVAL; 3084 error = copyin(ireq->i_data, &tmpaddr, 3085 IEEE80211_ADDR_LEN); 3086 if (error == 0) 3087 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3088 break; 3089 case IEEE80211_MESH_RTCMD_DELETE: 3090 ieee80211_mesh_rt_del(vap, ireq->i_data); 3091 break; 3092 default: 3093 return ENOSYS; 3094 } 3095 break; 3096 case IEEE80211_IOC_MESH_PR_METRIC: 3097 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3098 if (error == 0) { 3099 error = mesh_select_proto_metric(vap, tmpproto); 3100 if (error == 0) 3101 error = ENETRESET; 3102 } 3103 break; 3104 case IEEE80211_IOC_MESH_PR_PATH: 3105 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3106 if (error == 0) { 3107 error = mesh_select_proto_path(vap, tmpproto); 3108 if (error == 0) 3109 error = ENETRESET; 3110 } 3111 break; 3112 default: 3113 return ENOSYS; 3114 } 3115 return error; 3116} 3117IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3118