ieee80211_mesh.c revision 234892
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 234892 2012-05-01 16:14:18Z 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 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 348 ms->ms_ppath->mpp_senderror(vap, dest, rt, 349 IEEE80211_REASON_MESH_PERR_NO_PROXY); 350 } else { 351 ms->ms_ppath->mpp_senderror(vap, dest, rt, 352 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 353 } 354 mesh_rt_del(ms, rt); 355 MESH_RT_UNLOCK(ms); 356 return; 357 } 358 } 359 MESH_RT_UNLOCK(ms); 360} 361 362void 363ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 364{ 365 struct ieee80211_mesh_state *ms = vap->iv_mesh; 366 struct ieee80211_mesh_route *rt, *next; 367 368 if (ms == NULL) 369 return; 370 MESH_RT_LOCK(ms); 371 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 372 mesh_rt_del(ms, rt); 373 MESH_RT_UNLOCK(ms); 374} 375 376void 377ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 378 const uint8_t peer[IEEE80211_ADDR_LEN]) 379{ 380 struct ieee80211_mesh_state *ms = vap->iv_mesh; 381 struct ieee80211_mesh_route *rt, *next; 382 383 MESH_RT_LOCK(ms); 384 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 385 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 386 mesh_rt_del(ms, rt); 387 } 388 MESH_RT_UNLOCK(ms); 389} 390 391/* 392 * Flush expired routing entries, i.e. those in invalid state for 393 * some time. 394 */ 395static void 396mesh_rt_flush_invalid(struct ieee80211vap *vap) 397{ 398 struct ieee80211_mesh_state *ms = vap->iv_mesh; 399 struct ieee80211_mesh_route *rt, *next; 400 401 if (ms == NULL) 402 return; 403 MESH_RT_LOCK(ms); 404 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 405 ieee80211_mesh_rt_update(rt, 0); 406 /* 407 * NB: we check for lifetime == 0 so that we give a chance 408 * for route discovery to complete. 409 */ 410 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 && 411 rt->rt_lifetime == 0) 412 mesh_rt_del(ms, rt); 413 } 414 MESH_RT_UNLOCK(ms); 415} 416 417#define N(a) (sizeof(a) / sizeof(a[0])) 418int 419ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 420{ 421 int i, firstempty = -1; 422 423 for (i = 0; i < N(mesh_proto_paths); i++) { 424 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 425 IEEE80211_MESH_PROTO_DSZ) == 0) 426 return EEXIST; 427 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 428 firstempty = i; 429 } 430 if (firstempty < 0) 431 return ENOSPC; 432 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 433 mesh_proto_paths[firstempty].mpp_active = 1; 434 return 0; 435} 436 437int 438ieee80211_mesh_register_proto_metric(const struct 439 ieee80211_mesh_proto_metric *mpm) 440{ 441 int i, firstempty = -1; 442 443 for (i = 0; i < N(mesh_proto_metrics); i++) { 444 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 445 IEEE80211_MESH_PROTO_DSZ) == 0) 446 return EEXIST; 447 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 448 firstempty = i; 449 } 450 if (firstempty < 0) 451 return ENOSPC; 452 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 453 mesh_proto_metrics[firstempty].mpm_active = 1; 454 return 0; 455} 456 457static int 458mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 459{ 460 struct ieee80211_mesh_state *ms = vap->iv_mesh; 461 int i; 462 463 for (i = 0; i < N(mesh_proto_paths); i++) { 464 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 465 ms->ms_ppath = &mesh_proto_paths[i]; 466 return 0; 467 } 468 } 469 return ENOENT; 470} 471 472static int 473mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 474{ 475 struct ieee80211_mesh_state *ms = vap->iv_mesh; 476 int i; 477 478 for (i = 0; i < N(mesh_proto_metrics); i++) { 479 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 480 ms->ms_pmetric = &mesh_proto_metrics[i]; 481 return 0; 482 } 483 } 484 return ENOENT; 485} 486#undef N 487 488static void 489ieee80211_mesh_init(void) 490{ 491 492 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 493 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 494 495 /* 496 * Setup mesh parameters that depends on the clock frequency. 497 */ 498 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 499 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 500 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 501 502 /* 503 * Register action frame handlers. 504 */ 505 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 506 IEEE80211_ACTION_MESHPEERING_OPEN, 507 mesh_recv_action_meshpeering_open); 508 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 509 IEEE80211_ACTION_MESHPEERING_CONFIRM, 510 mesh_recv_action_meshpeering_confirm); 511 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 512 IEEE80211_ACTION_MESHPEERING_CLOSE, 513 mesh_recv_action_meshpeering_close); 514 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 515 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 516 517 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 518 IEEE80211_ACTION_MESHPEERING_OPEN, 519 mesh_send_action_meshpeering_open); 520 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 521 IEEE80211_ACTION_MESHPEERING_CONFIRM, 522 mesh_send_action_meshpeering_confirm); 523 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 524 IEEE80211_ACTION_MESHPEERING_CLOSE, 525 mesh_send_action_meshpeering_close); 526 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 527 IEEE80211_ACTION_MESH_LMETRIC, 528 mesh_send_action_meshlmetric); 529 530 /* 531 * Register Airtime Link Metric. 532 */ 533 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 534 535} 536SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 537 538void 539ieee80211_mesh_attach(struct ieee80211com *ic) 540{ 541 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 542} 543 544void 545ieee80211_mesh_detach(struct ieee80211com *ic) 546{ 547} 548 549static void 550mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 551{ 552 struct ieee80211com *ic = ni->ni_ic; 553 uint16_t args[3]; 554 555 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 556 args[0] = ni->ni_mlpid; 557 args[1] = ni->ni_mllid; 558 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 559 ieee80211_send_action(ni, 560 IEEE80211_ACTION_CAT_SELF_PROT, 561 IEEE80211_ACTION_MESHPEERING_CLOSE, 562 args); 563 } 564 callout_drain(&ni->ni_mltimer); 565 /* XXX belongs in hwmp */ 566 ieee80211_ageq_drain_node(&ic->ic_stageq, 567 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 568} 569 570static void 571mesh_vdetach(struct ieee80211vap *vap) 572{ 573 struct ieee80211_mesh_state *ms = vap->iv_mesh; 574 575 callout_drain(&ms->ms_cleantimer); 576 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 577 NULL); 578 ieee80211_mesh_rt_flush(vap); 579 mtx_destroy(&ms->ms_rt_lock); 580 ms->ms_ppath->mpp_vdetach(vap); 581 free(vap->iv_mesh, M_80211_VAP); 582 vap->iv_mesh = NULL; 583} 584 585static void 586mesh_vattach(struct ieee80211vap *vap) 587{ 588 struct ieee80211_mesh_state *ms; 589 vap->iv_newstate = mesh_newstate; 590 vap->iv_input = mesh_input; 591 vap->iv_opdetach = mesh_vdetach; 592 vap->iv_recv_mgmt = mesh_recv_mgmt; 593 vap->iv_recv_ctl = mesh_recv_ctl; 594 ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 595 M_NOWAIT | M_ZERO); 596 if (ms == NULL) { 597 printf("%s: couldn't alloc MBSS state\n", __func__); 598 return; 599 } 600 vap->iv_mesh = ms; 601 ms->ms_seq = 0; 602 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 603 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 604 TAILQ_INIT(&ms->ms_routes); 605 mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF); 606 callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE); 607 mesh_select_proto_metric(vap, "AIRTIME"); 608 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 609 mesh_select_proto_path(vap, "HWMP"); 610 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 611 ms->ms_ppath->mpp_vattach(vap); 612} 613 614/* 615 * IEEE80211_M_MBSS vap state machine handler. 616 */ 617static int 618mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 619{ 620 struct ieee80211_mesh_state *ms = vap->iv_mesh; 621 struct ieee80211com *ic = vap->iv_ic; 622 struct ieee80211_node *ni; 623 enum ieee80211_state ostate; 624 625 IEEE80211_LOCK_ASSERT(ic); 626 627 ostate = vap->iv_state; 628 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 629 __func__, ieee80211_state_name[ostate], 630 ieee80211_state_name[nstate], arg); 631 vap->iv_state = nstate; /* state transition */ 632 if (ostate != IEEE80211_S_SCAN) 633 ieee80211_cancel_scan(vap); /* background scan */ 634 ni = vap->iv_bss; /* NB: no reference held */ 635 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) 636 callout_drain(&ms->ms_cleantimer); 637 switch (nstate) { 638 case IEEE80211_S_INIT: 639 switch (ostate) { 640 case IEEE80211_S_SCAN: 641 ieee80211_cancel_scan(vap); 642 break; 643 case IEEE80211_S_CAC: 644 ieee80211_dfs_cac_stop(vap); 645 break; 646 case IEEE80211_S_RUN: 647 ieee80211_iterate_nodes(&ic->ic_sta, 648 mesh_vdetach_peers, NULL); 649 break; 650 default: 651 break; 652 } 653 if (ostate != IEEE80211_S_INIT) { 654 /* NB: optimize INIT -> INIT case */ 655 ieee80211_reset_bss(vap); 656 ieee80211_mesh_rt_flush(vap); 657 } 658 break; 659 case IEEE80211_S_SCAN: 660 switch (ostate) { 661 case IEEE80211_S_INIT: 662 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 663 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 664 ms->ms_idlen != 0) { 665 /* 666 * Already have a channel and a mesh ID; bypass 667 * the scan and startup immediately. 668 */ 669 ieee80211_create_ibss(vap, vap->iv_des_chan); 670 break; 671 } 672 /* 673 * Initiate a scan. We can come here as a result 674 * of an IEEE80211_IOC_SCAN_REQ too in which case 675 * the vap will be marked with IEEE80211_FEXT_SCANREQ 676 * and the scan request parameters will be present 677 * in iv_scanreq. Otherwise we do the default. 678 */ 679 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 680 ieee80211_check_scan(vap, 681 vap->iv_scanreq_flags, 682 vap->iv_scanreq_duration, 683 vap->iv_scanreq_mindwell, 684 vap->iv_scanreq_maxdwell, 685 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 686 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 687 } else 688 ieee80211_check_scan_current(vap); 689 break; 690 default: 691 break; 692 } 693 break; 694 case IEEE80211_S_CAC: 695 /* 696 * Start CAC on a DFS channel. We come here when starting 697 * a bss on a DFS channel (see ieee80211_create_ibss). 698 */ 699 ieee80211_dfs_cac_start(vap); 700 break; 701 case IEEE80211_S_RUN: 702 switch (ostate) { 703 case IEEE80211_S_INIT: 704 /* 705 * Already have a channel; bypass the 706 * scan and startup immediately. 707 * Note that ieee80211_create_ibss will call 708 * back to do a RUN->RUN state change. 709 */ 710 ieee80211_create_ibss(vap, 711 ieee80211_ht_adjust_channel(ic, 712 ic->ic_curchan, vap->iv_flags_ht)); 713 /* NB: iv_bss is changed on return */ 714 break; 715 case IEEE80211_S_CAC: 716 /* 717 * NB: This is the normal state change when CAC 718 * expires and no radar was detected; no need to 719 * clear the CAC timer as it's already expired. 720 */ 721 /* fall thru... */ 722 case IEEE80211_S_CSA: 723#if 0 724 /* 725 * Shorten inactivity timer of associated stations 726 * to weed out sta's that don't follow a CSA. 727 */ 728 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 729#endif 730 /* 731 * Update bss node channel to reflect where 732 * we landed after CSA. 733 */ 734 ieee80211_node_set_chan(vap->iv_bss, 735 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 736 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 737 /* XXX bypass debug msgs */ 738 break; 739 case IEEE80211_S_SCAN: 740 case IEEE80211_S_RUN: 741#ifdef IEEE80211_DEBUG 742 if (ieee80211_msg_debug(vap)) { 743 struct ieee80211_node *ni = vap->iv_bss; 744 ieee80211_note(vap, 745 "synchronized with %s meshid ", 746 ether_sprintf(ni->ni_meshid)); 747 ieee80211_print_essid(ni->ni_meshid, 748 ni->ni_meshidlen); 749 /* XXX MCS/HT */ 750 printf(" channel %d\n", 751 ieee80211_chan2ieee(ic, ic->ic_curchan)); 752 } 753#endif 754 break; 755 default: 756 break; 757 } 758 ieee80211_node_authorize(vap->iv_bss); 759 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 760 mesh_rt_cleanup_cb, vap); 761 break; 762 default: 763 break; 764 } 765 /* NB: ostate not nstate */ 766 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 767 return 0; 768} 769 770static void 771mesh_rt_cleanup_cb(void *arg) 772{ 773 struct ieee80211vap *vap = arg; 774 struct ieee80211_mesh_state *ms = vap->iv_mesh; 775 776 mesh_rt_flush_invalid(vap); 777 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 778 mesh_rt_cleanup_cb, vap); 779} 780 781 782/* 783 * Helper function to note the Mesh Peer Link FSM change. 784 */ 785static void 786mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 787{ 788 struct ieee80211vap *vap = ni->ni_vap; 789 struct ieee80211_mesh_state *ms = vap->iv_mesh; 790#ifdef IEEE80211_DEBUG 791 static const char *meshlinkstates[] = { 792 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 793 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 794 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 795 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 796 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 797 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 798 }; 799#endif 800 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 801 ni, "peer link: %s -> %s", 802 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 803 804 /* track neighbor count */ 805 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 806 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 807 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 808 ms->ms_neighbors++; 809 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 810 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 811 state != IEEE80211_NODE_MESH_ESTABLISHED) { 812 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 813 ms->ms_neighbors--; 814 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 815 } 816 ni->ni_mlstate = state; 817 switch (state) { 818 case IEEE80211_NODE_MESH_HOLDING: 819 ms->ms_ppath->mpp_peerdown(ni); 820 break; 821 case IEEE80211_NODE_MESH_ESTABLISHED: 822 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 823 break; 824 default: 825 break; 826 } 827} 828 829/* 830 * Helper function to generate a unique local ID required for mesh 831 * peer establishment. 832 */ 833static void 834mesh_checkid(void *arg, struct ieee80211_node *ni) 835{ 836 uint16_t *r = arg; 837 838 if (*r == ni->ni_mllid) 839 *(uint16_t *)arg = 0; 840} 841 842static uint32_t 843mesh_generateid(struct ieee80211vap *vap) 844{ 845 int maxiter = 4; 846 uint16_t r; 847 848 do { 849 get_random_bytes(&r, 2); 850 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 851 maxiter--; 852 } while (r == 0 && maxiter > 0); 853 return r; 854} 855 856/* 857 * Verifies if we already received this packet by checking its 858 * sequence number. 859 * Returns 0 if the frame is to be accepted, 1 otherwise. 860 */ 861static int 862mesh_checkpseq(struct ieee80211vap *vap, 863 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 864{ 865 struct ieee80211_mesh_route *rt; 866 867 rt = ieee80211_mesh_rt_find(vap, source); 868 if (rt == NULL) { 869 rt = ieee80211_mesh_rt_add(vap, source); 870 if (rt == NULL) { 871 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 872 "%s", "add mcast route failed"); 873 vap->iv_stats.is_mesh_rtaddfailed++; 874 return 1; 875 } 876 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 877 "add mcast route, mesh seqno %d", seq); 878 rt->rt_lastmseq = seq; 879 return 0; 880 } 881 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 882 return 1; 883 } else { 884 rt->rt_lastmseq = seq; 885 return 0; 886 } 887} 888 889/* 890 * Iterate the routing table and locate the next hop. 891 */ 892static struct ieee80211_node * 893mesh_find_txnode(struct ieee80211vap *vap, 894 const uint8_t dest[IEEE80211_ADDR_LEN]) 895{ 896 struct ieee80211_mesh_route *rt; 897 898 rt = ieee80211_mesh_rt_find(vap, dest); 899 if (rt == NULL) 900 return NULL; 901 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 || 902 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) { 903 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 904 "%s: !valid or proxy, flags 0x%x", __func__, rt->rt_flags); 905 /* XXX stat */ 906 return NULL; 907 } 908 return ieee80211_find_txnode(vap, rt->rt_nexthop); 909} 910 911/* 912 * Forward the specified frame. 913 * Decrement the TTL and set TA to our MAC address. 914 */ 915static void 916mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 917 const struct ieee80211_meshcntl *mc) 918{ 919 struct ieee80211com *ic = vap->iv_ic; 920 struct ieee80211_mesh_state *ms = vap->iv_mesh; 921 struct ifnet *ifp = vap->iv_ifp; 922 struct ifnet *parent = ic->ic_ifp; 923 const struct ieee80211_frame *wh = 924 mtod(m, const struct ieee80211_frame *); 925 struct mbuf *mcopy; 926 struct ieee80211_meshcntl *mccopy; 927 struct ieee80211_frame *whcopy; 928 struct ieee80211_node *ni; 929 int err; 930 931 /* 932 * mesh ttl of 1 means we are the last one receving it, 933 * according to amendment we decrement and then check if 934 * 0, if so we dont forward. 935 */ 936 if (mc->mc_ttl < 1) { 937 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 938 "%s", "frame not fwd'd, ttl 1"); 939 vap->iv_stats.is_mesh_fwd_ttl++; 940 return; 941 } 942 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 943 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 944 "%s", "frame not fwd'd, fwding disabled"); 945 vap->iv_stats.is_mesh_fwd_disabled++; 946 return; 947 } 948 mcopy = m_dup(m, M_DONTWAIT); 949 if (mcopy == NULL) { 950 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 951 "%s", "frame not fwd'd, cannot dup"); 952 vap->iv_stats.is_mesh_fwd_nobuf++; 953 ifp->if_oerrors++; 954 return; 955 } 956 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 957 sizeof(struct ieee80211_meshcntl)); 958 if (mcopy == NULL) { 959 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 960 "%s", "frame not fwd'd, too short"); 961 vap->iv_stats.is_mesh_fwd_tooshort++; 962 ifp->if_oerrors++; 963 m_freem(mcopy); 964 return; 965 } 966 whcopy = mtod(mcopy, struct ieee80211_frame *); 967 mccopy = (struct ieee80211_meshcntl *) 968 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 969 /* XXX clear other bits? */ 970 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 971 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 972 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 973 ni = ieee80211_ref_node(vap->iv_bss); 974 mcopy->m_flags |= M_MCAST; 975 } else { 976 ni = mesh_find_txnode(vap, whcopy->i_addr3); 977 if (ni == NULL) { 978 /* 979 * [Optional] any of the following three actions: 980 * o silently discard 981 * o trigger a path discovery 982 * o inform TA that meshDA is unknown. 983 */ 984 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 985 "%s", "frame not fwd'd, no path"); 986 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 987 IEEE80211_REASON_MESH_PERR_NO_FI); 988 vap->iv_stats.is_mesh_fwd_nopath++; 989 m_freem(mcopy); 990 return; 991 } 992 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 993 } 994 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 995 mccopy->mc_ttl--; 996 997 /* XXX calculate priority so drivers can find the tx queue */ 998 M_WME_SETAC(mcopy, WME_AC_BE); 999 1000 /* XXX do we know m_nextpkt is NULL? */ 1001 mcopy->m_pkthdr.rcvif = (void *) ni; 1002 err = parent->if_transmit(parent, mcopy); 1003 if (err != 0) { 1004 /* NB: IFQ_HANDOFF reclaims mbuf */ 1005 ieee80211_free_node(ni); 1006 } else { 1007 ifp->if_opackets++; 1008 } 1009} 1010 1011static struct mbuf * 1012mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1013{ 1014#define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1015#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1016 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1017 sizeof(struct ieee80211_meshcntl_ae10)]; 1018 const struct ieee80211_qosframe_addr4 *wh; 1019 const struct ieee80211_meshcntl_ae10 *mc; 1020 struct ether_header *eh; 1021 struct llc *llc; 1022 int ae; 1023 1024 if (m->m_len < hdrlen + sizeof(*llc) && 1025 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1026 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1027 "discard data frame: %s", "m_pullup failed"); 1028 vap->iv_stats.is_rx_tooshort++; 1029 return NULL; 1030 } 1031 memcpy(b, mtod(m, caddr_t), hdrlen); 1032 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1033 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1034 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1035 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1036 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1037 1038 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1039 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1040 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1041 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1042 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1043 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1044 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1045 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1046 llc = NULL; 1047 } else { 1048 m_adj(m, hdrlen - sizeof(*eh)); 1049 } 1050 eh = mtod(m, struct ether_header *); 1051 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1052 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1053 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1054 if (ae == IEEE80211_MESH_AE_00) { 1055 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1056 } else if (ae == IEEE80211_MESH_AE_01) { 1057 IEEE80211_ADDR_COPY(eh->ether_shost, 1058 MC01(mc)->mc_addr4); 1059 } else { 1060 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1061 (const struct ieee80211_frame *)wh, NULL, 1062 "bad AE %d", ae); 1063 vap->iv_stats.is_mesh_badae++; 1064 m_freem(m); 1065 return NULL; 1066 } 1067 } else { 1068 if (ae == IEEE80211_MESH_AE_00) { 1069 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1070 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1071 } else if (ae == IEEE80211_MESH_AE_10) { 1072 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1073 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1074 } else { 1075 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1076 (const struct ieee80211_frame *)wh, NULL, 1077 "bad AE %d", ae); 1078 vap->iv_stats.is_mesh_badae++; 1079 m_freem(m); 1080 return NULL; 1081 } 1082 } 1083#ifdef ALIGNED_POINTER 1084 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1085 m = ieee80211_realign(vap, m, sizeof(*eh)); 1086 if (m == NULL) 1087 return NULL; 1088 } 1089#endif /* ALIGNED_POINTER */ 1090 if (llc != NULL) { 1091 eh = mtod(m, struct ether_header *); 1092 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1093 } 1094 return m; 1095#undef WDIR 1096#undef MC01 1097} 1098 1099/* 1100 * Return non-zero if the unicast mesh data frame should be processed 1101 * locally. Frames that are not proxy'd have our address, otherwise 1102 * we need to consult the routing table to look for a proxy entry. 1103 */ 1104static __inline int 1105mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1106 const struct ieee80211_meshcntl *mc) 1107{ 1108 int ae = mc->mc_flags & 3; 1109 1110 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1111 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1112 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1113 ("bad AE %d", ae)); 1114 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1115 const struct ieee80211_meshcntl_ae10 *mc10 = 1116 (const struct ieee80211_meshcntl_ae10 *) mc; 1117 struct ieee80211_mesh_route *rt = 1118 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1119 /* check for proxy route to ourself */ 1120 return (rt != NULL && 1121 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1122 } else /* ucast w/o proxy */ 1123 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1124} 1125 1126/* 1127 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1128 * > 0 means we have forwarded data and no need to process locally 1129 * == 0 means we want to process locally (and we may have forwarded data 1130 * < 0 means there was an error and data should be discarded 1131 */ 1132static int 1133mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1134 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1135{ 1136 struct ieee80211_qosframe_addr4 *qwh; 1137 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1138 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1139 1140 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1141 1142 /* 1143 * TODO: 1144 * o verify addr2 is a legitimate transmitter 1145 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1146 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1147 */ 1148 1149 /* set lifetime of addr3 (meshDA) to initial value */ 1150 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1151 if (rt_meshda == NULL) { 1152 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1153 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1154 /* 1155 * [Optional] any of the following three actions: 1156 * o silently discard [X] 1157 * o trigger a path discovery [ ] 1158 * o inform TA that meshDA is unknown. [ ] 1159 */ 1160 /* XXX: stats */ 1161 return (-1); 1162 } 1163 1164 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1165 ms->ms_ppath->mpp_inact)); 1166 1167 /* set lifetime of addr4 (meshSA) to initial value */ 1168 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1169 KASSERT(rt_meshsa != NULL, ("no route")); 1170 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1171 ms->ms_ppath->mpp_inact)); 1172 1173 mesh_forward(vap, m, mc); 1174 return (1); /* dont process locally */ 1175} 1176 1177/* 1178 * Verifies transmitter, updates lifetime, precursor list and process data 1179 * locally, if data is is proxy with AE = 10 it could mean data should go 1180 * on another mesh path or data should be forwarded to the DS. 1181 * 1182 * > 0 means we have forwarded data and no need to process locally 1183 * == 0 means we want to process locally (and we may have forwarded data 1184 * < 0 means there was an error and data should be discarded 1185 */ 1186static int 1187mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1188 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1189{ 1190 struct ieee80211_qosframe_addr4 *qwh; 1191 const struct ieee80211_meshcntl_ae10 *mc10; 1192 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1193 struct ieee80211_mesh_route *rt; 1194 int ae; 1195 1196 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1197 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1198 1199 /* 1200 * TODO: 1201 * o verify addr2 is a legitimate transmitter 1202 * o lifetime of precursor entry is max(init, curr) 1203 */ 1204 1205 /* set lifetime of addr4 (meshSA) to initial value */ 1206 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1207 KASSERT(rt != NULL, ("no route")); 1208 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1209 rt = NULL; 1210 1211 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1212 KASSERT(ae == IEEE80211_MESH_AE_00 || 1213 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1214 if (ae == IEEE80211_MESH_AE_10) { 1215 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1216 return (0); /* process locally */ 1217 } 1218 1219 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1220 if (rt != NULL && 1221 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1222 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1223 /* 1224 * Forward on another mesh-path, according to 1225 * amendment as specified in 9.32.4.1 1226 */ 1227 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1228 mesh_forward(vap, m, 1229 (const struct ieee80211_meshcntl *)mc10); 1230 return (1); /* dont process locally */ 1231 } 1232 /* 1233 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1234 * addressed according to 13.11.3.2. 1235 */ 1236 } 1237 return (0); /* process locally */ 1238} 1239 1240/* 1241 * Try to forward the group addressed data on to other mesh STAs, and 1242 * also to the DS. 1243 * 1244 * > 0 means we have forwarded data and no need to process locally 1245 * == 0 means we want to process locally (and we may have forwarded data 1246 * < 0 means there was an error and data should be discarded 1247 */ 1248static int 1249mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1250 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1251{ 1252#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1253 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1254 1255 mesh_forward(vap, m, mc); 1256 1257 if(mc->mc_ttl > 0) { 1258 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1259 /* 1260 * Forward of MSDUs from the MBSS to DS group addressed 1261 * (according to 13.11.3.2) 1262 * This happens by delivering the packet, and a bridge 1263 * will sent it on another port member. 1264 */ 1265 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1266 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1267 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1268 MC01(mc)->mc_addr4, "%s", 1269 "forward from MBSS to the DS"); 1270 } 1271 } 1272 return (0); /* process locally */ 1273#undef MC01 1274} 1275 1276static int 1277mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 1278{ 1279#define HAS_SEQ(type) ((type & 0x4) == 0) 1280#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1281#define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1282 struct ieee80211vap *vap = ni->ni_vap; 1283 struct ieee80211com *ic = ni->ni_ic; 1284 struct ifnet *ifp = vap->iv_ifp; 1285 struct ieee80211_frame *wh; 1286 const struct ieee80211_meshcntl *mc; 1287 int hdrspace, meshdrlen, need_tap, error; 1288 uint8_t dir, type, subtype, ae; 1289 uint32_t seq; 1290 const uint8_t *addr; 1291 uint8_t qos[2]; 1292 ieee80211_seq rxseq; 1293 1294 KASSERT(ni != NULL, ("null node")); 1295 ni->ni_inact = ni->ni_inact_reload; 1296 1297 need_tap = 1; /* mbuf need to be tapped. */ 1298 type = -1; /* undefined */ 1299 1300 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1301 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1302 ni->ni_macaddr, NULL, 1303 "too short (1): len %u", m->m_pkthdr.len); 1304 vap->iv_stats.is_rx_tooshort++; 1305 goto out; 1306 } 1307 /* 1308 * Bit of a cheat here, we use a pointer for a 3-address 1309 * frame format but don't reference fields past outside 1310 * ieee80211_frame_min w/o first validating the data is 1311 * present. 1312 */ 1313 wh = mtod(m, struct ieee80211_frame *); 1314 1315 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1316 IEEE80211_FC0_VERSION_0) { 1317 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1318 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1319 vap->iv_stats.is_rx_badversion++; 1320 goto err; 1321 } 1322 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1323 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1324 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1325 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1326 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1327 ni->ni_noise = nf; 1328 if (HAS_SEQ(type)) { 1329 uint8_t tid = ieee80211_gettid(wh); 1330 1331 if (IEEE80211_QOS_HAS_SEQ(wh) && 1332 TID_TO_WME_AC(tid) >= WME_AC_VI) 1333 ic->ic_wme.wme_hipri_traffic++; 1334 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1335 if (! ieee80211_check_rxseq(ni, wh)) { 1336 /* duplicate, discard */ 1337 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1338 wh->i_addr1, "duplicate", 1339 "seqno <%u,%u> fragno <%u,%u> tid %u", 1340 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1341 ni->ni_rxseqs[tid] >> 1342 IEEE80211_SEQ_SEQ_SHIFT, 1343 rxseq & IEEE80211_SEQ_FRAG_MASK, 1344 ni->ni_rxseqs[tid] & 1345 IEEE80211_SEQ_FRAG_MASK, 1346 tid); 1347 vap->iv_stats.is_rx_dup++; 1348 IEEE80211_NODE_STAT(ni, rx_dup); 1349 goto out; 1350 } 1351 ni->ni_rxseqs[tid] = rxseq; 1352 } 1353 } 1354#ifdef IEEE80211_DEBUG 1355 /* 1356 * It's easier, but too expensive, to simulate different mesh 1357 * topologies by consulting the ACL policy very early, so do this 1358 * only under DEBUG. 1359 * 1360 * NB: this check is also done upon peering link initiation. 1361 */ 1362 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1363 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1364 wh, NULL, "%s", "disallowed by ACL"); 1365 vap->iv_stats.is_rx_acl++; 1366 goto out; 1367 } 1368#endif 1369 switch (type) { 1370 case IEEE80211_FC0_TYPE_DATA: 1371 if (ni == vap->iv_bss) 1372 goto out; 1373 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1374 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1375 ni->ni_macaddr, NULL, 1376 "peer link not yet established (%d)", 1377 ni->ni_mlstate); 1378 vap->iv_stats.is_mesh_nolink++; 1379 goto out; 1380 } 1381 if (dir != IEEE80211_FC1_DIR_FROMDS && 1382 dir != IEEE80211_FC1_DIR_DSTODS) { 1383 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1384 wh, "data", "incorrect dir 0x%x", dir); 1385 vap->iv_stats.is_rx_wrongdir++; 1386 goto err; 1387 } 1388 1389 /* All Mesh data frames are QoS subtype */ 1390 if (!HAS_SEQ(type)) { 1391 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1392 wh, "data", "incorrect subtype 0x%x", subtype); 1393 vap->iv_stats.is_rx_badsubtype++; 1394 goto err; 1395 } 1396 1397 /* 1398 * Next up, any fragmentation. 1399 * XXX: we defrag before we even try to forward, 1400 * Mesh Control field is not present in sub-sequent 1401 * fragmented frames. This is in contrast to Draft 4.0. 1402 */ 1403 hdrspace = ieee80211_hdrspace(ic, wh); 1404 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1405 m = ieee80211_defrag(ni, m, hdrspace); 1406 if (m == NULL) { 1407 /* Fragment dropped or frame not complete yet */ 1408 goto out; 1409 } 1410 } 1411 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1412 1413 /* 1414 * Now we have a complete Mesh Data frame. 1415 */ 1416 1417 /* 1418 * Only fromDStoDS data frames use 4 address qos frames 1419 * as specified in amendment. Otherwise addr4 is located 1420 * in the Mesh Control field and a 3 address qos frame 1421 * is used. 1422 */ 1423 if (IEEE80211_IS_DSTODS(wh)) 1424 *(uint16_t *)qos = *(uint16_t *) 1425 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1426 else 1427 *(uint16_t *)qos = *(uint16_t *) 1428 ((struct ieee80211_qosframe *)wh)->i_qos; 1429 1430 /* 1431 * NB: The mesh STA sets the Mesh Control Present 1432 * subfield to 1 in the Mesh Data frame containing 1433 * an unfragmented MSDU, an A-MSDU, or the first 1434 * fragment of an MSDU. 1435 * After defrag it should always be present. 1436 */ 1437 if (!(qos[1] & IEEE80211_QOS_MC)) { 1438 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1439 ni->ni_macaddr, NULL, 1440 "%s", "Mesh control field not present"); 1441 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1442 goto err; 1443 } 1444 1445 /* pull up enough to get to the mesh control */ 1446 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1447 (m = m_pullup(m, hdrspace + 1448 sizeof(struct ieee80211_meshcntl))) == NULL) { 1449 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1450 ni->ni_macaddr, NULL, 1451 "data too short: expecting %u", hdrspace); 1452 vap->iv_stats.is_rx_tooshort++; 1453 goto out; /* XXX */ 1454 } 1455 /* 1456 * Now calculate the full extent of the headers. Note 1457 * mesh_decap will pull up anything we didn't get 1458 * above when it strips the 802.11 headers. 1459 */ 1460 mc = (const struct ieee80211_meshcntl *) 1461 (mtod(m, const uint8_t *) + hdrspace); 1462 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1463 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1464 ae * IEEE80211_ADDR_LEN; 1465 hdrspace += meshdrlen; 1466 1467 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1468 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1469 (m->m_len < hdrspace) && 1470 ((m = m_pullup(m, hdrspace)) == NULL)) { 1471 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1472 ni->ni_macaddr, NULL, 1473 "data too short: expecting %u", hdrspace); 1474 vap->iv_stats.is_rx_tooshort++; 1475 goto out; /* XXX */ 1476 } 1477 /* XXX: are we sure there is no reallocating after m_pullup? */ 1478 1479 seq = LE_READ_4(mc->mc_seq); 1480 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1481 addr = wh->i_addr3; 1482 else if (ae == IEEE80211_MESH_AE_01) 1483 addr = MC01(mc)->mc_addr4; 1484 else 1485 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1486 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1487 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1488 addr, "data", "%s", "not to me"); 1489 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1490 goto out; 1491 } 1492 if (mesh_checkpseq(vap, addr, seq) != 0) { 1493 vap->iv_stats.is_rx_dup++; 1494 goto out; 1495 } 1496 1497 /* This code "routes" the frame to the right control path */ 1498 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1499 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1500 error = 1501 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1502 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1503 error = mesh_recv_group_data(vap, m, wh, mc); 1504 else 1505 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1506 wh, mc); 1507 } else 1508 error = mesh_recv_group_data(vap, m, wh, mc); 1509 if (error < 0) 1510 goto err; 1511 else if (error > 0) 1512 goto out; 1513 1514 if (ieee80211_radiotap_active_vap(vap)) 1515 ieee80211_radiotap_rx(vap, m); 1516 need_tap = 0; 1517 1518 /* 1519 * Finally, strip the 802.11 header. 1520 */ 1521 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1522 if (m == NULL) { 1523 /* XXX mask bit to check for both */ 1524 /* don't count Null data frames as errors */ 1525 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1526 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1527 goto out; 1528 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1529 ni->ni_macaddr, "data", "%s", "decap error"); 1530 vap->iv_stats.is_rx_decap++; 1531 IEEE80211_NODE_STAT(ni, rx_decap); 1532 goto err; 1533 } 1534 if (qos[0] & IEEE80211_QOS_AMSDU) { 1535 m = ieee80211_decap_amsdu(ni, m); 1536 if (m == NULL) 1537 return IEEE80211_FC0_TYPE_DATA; 1538 } 1539 ieee80211_deliver_data(vap, ni, m); 1540 return type; 1541 case IEEE80211_FC0_TYPE_MGT: 1542 vap->iv_stats.is_rx_mgmt++; 1543 IEEE80211_NODE_STAT(ni, rx_mgmt); 1544 if (dir != IEEE80211_FC1_DIR_NODS) { 1545 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1546 wh, "mgt", "incorrect dir 0x%x", dir); 1547 vap->iv_stats.is_rx_wrongdir++; 1548 goto err; 1549 } 1550 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1551 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1552 ni->ni_macaddr, "mgt", "too short: len %u", 1553 m->m_pkthdr.len); 1554 vap->iv_stats.is_rx_tooshort++; 1555 goto out; 1556 } 1557#ifdef IEEE80211_DEBUG 1558 if ((ieee80211_msg_debug(vap) && 1559 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1560 ieee80211_msg_dumppkts(vap)) { 1561 if_printf(ifp, "received %s from %s rssi %d\n", 1562 ieee80211_mgt_subtype_name[subtype >> 1563 IEEE80211_FC0_SUBTYPE_SHIFT], 1564 ether_sprintf(wh->i_addr2), rssi); 1565 } 1566#endif 1567 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1568 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1569 wh, NULL, "%s", "WEP set but not permitted"); 1570 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1571 goto out; 1572 } 1573 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1574 goto out; 1575 case IEEE80211_FC0_TYPE_CTL: 1576 vap->iv_stats.is_rx_ctl++; 1577 IEEE80211_NODE_STAT(ni, rx_ctrl); 1578 goto out; 1579 default: 1580 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1581 wh, "bad", "frame type 0x%x", type); 1582 /* should not come here */ 1583 break; 1584 } 1585err: 1586 ifp->if_ierrors++; 1587out: 1588 if (m != NULL) { 1589 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1590 ieee80211_radiotap_rx(vap, m); 1591 m_freem(m); 1592 } 1593 return type; 1594#undef HAS_SEQ 1595#undef MC01 1596#undef MC10 1597} 1598 1599static void 1600mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1601 int rssi, int nf) 1602{ 1603 struct ieee80211vap *vap = ni->ni_vap; 1604 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1605 struct ieee80211com *ic = ni->ni_ic; 1606 struct ieee80211_frame *wh; 1607 struct ieee80211_mesh_route *rt; 1608 uint8_t *frm, *efrm; 1609 1610 wh = mtod(m0, struct ieee80211_frame *); 1611 frm = (uint8_t *)&wh[1]; 1612 efrm = mtod(m0, uint8_t *) + m0->m_len; 1613 switch (subtype) { 1614 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1615 case IEEE80211_FC0_SUBTYPE_BEACON: 1616 { 1617 struct ieee80211_scanparams scan; 1618 /* 1619 * We process beacon/probe response 1620 * frames to discover neighbors. 1621 */ 1622 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1623 return; 1624 /* 1625 * Count frame now that we know it's to be processed. 1626 */ 1627 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1628 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1629 IEEE80211_NODE_STAT(ni, rx_beacons); 1630 } else 1631 IEEE80211_NODE_STAT(ni, rx_proberesp); 1632 /* 1633 * If scanning, just pass information to the scan module. 1634 */ 1635 if (ic->ic_flags & IEEE80211_F_SCAN) { 1636 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1637 /* 1638 * Actively scanning a channel marked passive; 1639 * send a probe request now that we know there 1640 * is 802.11 traffic present. 1641 * 1642 * XXX check if the beacon we recv'd gives 1643 * us what we need and suppress the probe req 1644 */ 1645 ieee80211_probe_curchan(vap, 1); 1646 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1647 } 1648 ieee80211_add_scan(vap, &scan, wh, 1649 subtype, rssi, nf); 1650 return; 1651 } 1652 1653 /* The rest of this code assumes we are running */ 1654 if (vap->iv_state != IEEE80211_S_RUN) 1655 return; 1656 /* 1657 * Ignore non-mesh STAs. 1658 */ 1659 if ((scan.capinfo & 1660 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1661 scan.meshid == NULL || scan.meshconf == NULL) { 1662 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1663 wh, "beacon", "%s", "not a mesh sta"); 1664 vap->iv_stats.is_mesh_wrongmesh++; 1665 return; 1666 } 1667 /* 1668 * Ignore STAs for other mesh networks. 1669 */ 1670 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1671 mesh_verify_meshconf(vap, scan.meshconf)) { 1672 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1673 wh, "beacon", "%s", "not for our mesh"); 1674 vap->iv_stats.is_mesh_wrongmesh++; 1675 return; 1676 } 1677 /* 1678 * Peer only based on the current ACL policy. 1679 */ 1680 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1681 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1682 wh, NULL, "%s", "disallowed by ACL"); 1683 vap->iv_stats.is_rx_acl++; 1684 return; 1685 } 1686 /* 1687 * Do neighbor discovery. 1688 */ 1689 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1690 /* 1691 * Create a new entry in the neighbor table. 1692 */ 1693 ni = ieee80211_add_neighbor(vap, wh, &scan); 1694 } 1695 /* 1696 * Automatically peer with discovered nodes if possible. 1697 * XXX backoff on repeated failure 1698 */ 1699 if (ni != vap->iv_bss && 1700 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1701 switch (ni->ni_mlstate) { 1702 case IEEE80211_NODE_MESH_IDLE: 1703 { 1704 uint16_t args[1]; 1705 1706 ni->ni_mlpid = mesh_generateid(vap); 1707 if (ni->ni_mlpid == 0) 1708 return; 1709 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1710 args[0] = ni->ni_mlpid; 1711 ieee80211_send_action(ni, 1712 IEEE80211_ACTION_CAT_SELF_PROT, 1713 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1714 ni->ni_mlrcnt = 0; 1715 mesh_peer_timeout_setup(ni); 1716 break; 1717 } 1718 case IEEE80211_NODE_MESH_ESTABLISHED: 1719 { 1720 /* 1721 * Valid beacon from a peer mesh STA 1722 * bump TA lifetime 1723 */ 1724 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1725 if(rt != NULL) { 1726 ieee80211_mesh_rt_update(rt, 1727 ticks_to_msecs( 1728 ms->ms_ppath->mpp_inact)); 1729 } 1730 break; 1731 } 1732 default: 1733 break; /* ignore */ 1734 } 1735 } 1736 break; 1737 } 1738 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1739 { 1740 uint8_t *ssid, *meshid, *rates, *xrates; 1741 uint8_t *sfrm; 1742 1743 if (vap->iv_state != IEEE80211_S_RUN) { 1744 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1745 wh, NULL, "wrong state %s", 1746 ieee80211_state_name[vap->iv_state]); 1747 vap->iv_stats.is_rx_mgtdiscard++; 1748 return; 1749 } 1750 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1751 /* frame must be directed */ 1752 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1753 wh, NULL, "%s", "not unicast"); 1754 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1755 return; 1756 } 1757 /* 1758 * prreq frame format 1759 * [tlv] ssid 1760 * [tlv] supported rates 1761 * [tlv] extended supported rates 1762 * [tlv] mesh id 1763 */ 1764 ssid = meshid = rates = xrates = NULL; 1765 sfrm = frm; 1766 while (efrm - frm > 1) { 1767 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1768 switch (*frm) { 1769 case IEEE80211_ELEMID_SSID: 1770 ssid = frm; 1771 break; 1772 case IEEE80211_ELEMID_RATES: 1773 rates = frm; 1774 break; 1775 case IEEE80211_ELEMID_XRATES: 1776 xrates = frm; 1777 break; 1778 case IEEE80211_ELEMID_MESHID: 1779 meshid = frm; 1780 break; 1781 } 1782 frm += frm[1] + 2; 1783 } 1784 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1785 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1786 if (xrates != NULL) 1787 IEEE80211_VERIFY_ELEMENT(xrates, 1788 IEEE80211_RATE_MAXSIZE - rates[1], return); 1789 if (meshid != NULL) { 1790 IEEE80211_VERIFY_ELEMENT(meshid, 1791 IEEE80211_MESHID_LEN, return); 1792 /* NB: meshid, not ssid */ 1793 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 1794 } 1795 1796 /* XXX find a better class or define it's own */ 1797 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1798 "%s", "recv probe req"); 1799 /* 1800 * Some legacy 11b clients cannot hack a complete 1801 * probe response frame. When the request includes 1802 * only a bare-bones rate set, communicate this to 1803 * the transmit side. 1804 */ 1805 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 1806 break; 1807 } 1808 1809 case IEEE80211_FC0_SUBTYPE_ACTION: 1810 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 1811 if (ni == vap->iv_bss) { 1812 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1813 wh, NULL, "%s", "unknown node"); 1814 vap->iv_stats.is_rx_mgtdiscard++; 1815 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1816 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1817 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1818 wh, NULL, "%s", "not for us"); 1819 vap->iv_stats.is_rx_mgtdiscard++; 1820 } else if (vap->iv_state != IEEE80211_S_RUN) { 1821 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1822 wh, NULL, "wrong state %s", 1823 ieee80211_state_name[vap->iv_state]); 1824 vap->iv_stats.is_rx_mgtdiscard++; 1825 } else { 1826 if (ieee80211_parse_action(ni, m0) == 0) 1827 (void)ic->ic_recv_action(ni, wh, frm, efrm); 1828 } 1829 break; 1830 1831 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1832 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1833 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1834 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 1835 case IEEE80211_FC0_SUBTYPE_ATIM: 1836 case IEEE80211_FC0_SUBTYPE_DISASSOC: 1837 case IEEE80211_FC0_SUBTYPE_AUTH: 1838 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1839 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1840 wh, NULL, "%s", "not handled"); 1841 vap->iv_stats.is_rx_mgtdiscard++; 1842 break; 1843 1844 default: 1845 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1846 wh, "mgt", "subtype 0x%x not handled", subtype); 1847 vap->iv_stats.is_rx_badsubtype++; 1848 break; 1849 } 1850} 1851 1852static void 1853mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 1854{ 1855 1856 switch (subtype) { 1857 case IEEE80211_FC0_SUBTYPE_BAR: 1858 ieee80211_recv_bar(ni, m); 1859 break; 1860 } 1861} 1862 1863/* 1864 * Parse meshpeering action ie's for MPM frames 1865 */ 1866static const struct ieee80211_meshpeer_ie * 1867mesh_parse_meshpeering_action(struct ieee80211_node *ni, 1868 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 1869 const uint8_t *frm, const uint8_t *efrm, 1870 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 1871{ 1872 struct ieee80211vap *vap = ni->ni_vap; 1873 const struct ieee80211_meshpeer_ie *mpie; 1874 uint16_t args[3]; 1875 const uint8_t *meshid, *meshconf, *meshpeer; 1876 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 1877 1878 meshid = meshconf = meshpeer = NULL; 1879 while (efrm - frm > 1) { 1880 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 1881 switch (*frm) { 1882 case IEEE80211_ELEMID_MESHID: 1883 meshid = frm; 1884 break; 1885 case IEEE80211_ELEMID_MESHCONF: 1886 meshconf = frm; 1887 break; 1888 case IEEE80211_ELEMID_MESHPEER: 1889 meshpeer = frm; 1890 mpie = (const struct ieee80211_meshpeer_ie *) frm; 1891 memset(mp, 0, sizeof(*mp)); 1892 mp->peer_len = mpie->peer_len; 1893 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 1894 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 1895 switch (subtype) { 1896 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 1897 mp->peer_linkid = 1898 LE_READ_2(&mpie->peer_linkid); 1899 break; 1900 case IEEE80211_ACTION_MESHPEERING_CLOSE: 1901 /* NB: peer link ID is optional */ 1902 if (mpie->peer_len == 1903 (IEEE80211_MPM_BASE_SZ + 2)) { 1904 mp->peer_linkid = 0; 1905 mp->peer_rcode = 1906 LE_READ_2(&mpie->peer_linkid); 1907 } else { 1908 mp->peer_linkid = 1909 LE_READ_2(&mpie->peer_linkid); 1910 mp->peer_rcode = 1911 LE_READ_2(&mpie->peer_rcode); 1912 } 1913 break; 1914 } 1915 break; 1916 } 1917 frm += frm[1] + 2; 1918 } 1919 1920 /* 1921 * Verify the contents of the frame. 1922 * If it fails validation, close the peer link. 1923 */ 1924 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 1925 sendclose = 1; 1926 IEEE80211_DISCARD(vap, 1927 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1928 wh, NULL, "%s", "MPM validation failed"); 1929 } 1930 1931 /* If meshid is not the same reject any frames type. */ 1932 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 1933 sendclose = 1; 1934 IEEE80211_DISCARD(vap, 1935 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1936 wh, NULL, "%s", "not for our mesh"); 1937 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 1938 /* 1939 * Standard not clear about this, if we dont ignore 1940 * there will be an endless loop between nodes sending 1941 * CLOSE frames between each other with wrong meshid. 1942 * Discard and timers will bring FSM to IDLE state. 1943 */ 1944 return NULL; 1945 } 1946 } 1947 1948 /* 1949 * Close frames are accepted if meshid is the same. 1950 * Verify the other two types. 1951 */ 1952 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 1953 mesh_verify_meshconf(vap, meshconf)) { 1954 sendclose = 1; 1955 IEEE80211_DISCARD(vap, 1956 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1957 wh, NULL, "%s", "configuration missmatch"); 1958 } 1959 1960 if (sendclose) { 1961 vap->iv_stats.is_rx_mgtdiscard++; 1962 switch (ni->ni_mlstate) { 1963 case IEEE80211_NODE_MESH_IDLE: 1964 case IEEE80211_NODE_MESH_ESTABLISHED: 1965 case IEEE80211_NODE_MESH_HOLDING: 1966 /* ignore */ 1967 break; 1968 case IEEE80211_NODE_MESH_OPENSNT: 1969 case IEEE80211_NODE_MESH_OPENRCV: 1970 case IEEE80211_NODE_MESH_CONFIRMRCV: 1971 args[0] = ni->ni_mlpid; 1972 args[1] = ni->ni_mllid; 1973 /* Reason codes for rejection */ 1974 switch (subtype) { 1975 case IEEE80211_ACTION_MESHPEERING_OPEN: 1976 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 1977 break; 1978 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 1979 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 1980 break; 1981 } 1982 ieee80211_send_action(ni, 1983 IEEE80211_ACTION_CAT_SELF_PROT, 1984 IEEE80211_ACTION_MESHPEERING_CLOSE, 1985 args); 1986 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1987 mesh_peer_timeout_setup(ni); 1988 break; 1989 } 1990 return NULL; 1991 } 1992 1993 return (const struct ieee80211_meshpeer_ie *) mp; 1994} 1995 1996static int 1997mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 1998 const struct ieee80211_frame *wh, 1999 const uint8_t *frm, const uint8_t *efrm) 2000{ 2001 struct ieee80211vap *vap = ni->ni_vap; 2002 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2003 struct ieee80211_meshpeer_ie ie; 2004 const struct ieee80211_meshpeer_ie *meshpeer; 2005 uint16_t args[3]; 2006 2007 /* +2+2 for action + code + capabilites */ 2008 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2009 IEEE80211_ACTION_MESHPEERING_OPEN); 2010 if (meshpeer == NULL) { 2011 return 0; 2012 } 2013 2014 /* XXX move up */ 2015 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2016 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2017 2018 switch (ni->ni_mlstate) { 2019 case IEEE80211_NODE_MESH_IDLE: 2020 /* Reject open request if reached our maximum neighbor count */ 2021 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2022 args[0] = meshpeer->peer_llinkid; 2023 args[1] = 0; 2024 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2025 ieee80211_send_action(ni, 2026 IEEE80211_ACTION_CAT_SELF_PROT, 2027 IEEE80211_ACTION_MESHPEERING_CLOSE, 2028 args); 2029 /* stay in IDLE state */ 2030 return (0); 2031 } 2032 /* Open frame accepted */ 2033 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2034 ni->ni_mllid = meshpeer->peer_llinkid; 2035 ni->ni_mlpid = mesh_generateid(vap); 2036 if (ni->ni_mlpid == 0) 2037 return 0; /* XXX */ 2038 args[0] = ni->ni_mlpid; 2039 /* Announce we're open too... */ 2040 ieee80211_send_action(ni, 2041 IEEE80211_ACTION_CAT_SELF_PROT, 2042 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2043 /* ...and confirm the link. */ 2044 args[0] = ni->ni_mlpid; 2045 args[1] = ni->ni_mllid; 2046 ieee80211_send_action(ni, 2047 IEEE80211_ACTION_CAT_SELF_PROT, 2048 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2049 args); 2050 mesh_peer_timeout_setup(ni); 2051 break; 2052 case IEEE80211_NODE_MESH_OPENRCV: 2053 /* Wrong Link ID */ 2054 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2055 args[0] = ni->ni_mllid; 2056 args[1] = ni->ni_mlpid; 2057 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2058 ieee80211_send_action(ni, 2059 IEEE80211_ACTION_CAT_SELF_PROT, 2060 IEEE80211_ACTION_MESHPEERING_CLOSE, 2061 args); 2062 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2063 mesh_peer_timeout_setup(ni); 2064 break; 2065 } 2066 /* Duplicate open, confirm again. */ 2067 args[0] = ni->ni_mlpid; 2068 args[1] = ni->ni_mllid; 2069 ieee80211_send_action(ni, 2070 IEEE80211_ACTION_CAT_SELF_PROT, 2071 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2072 args); 2073 break; 2074 case IEEE80211_NODE_MESH_OPENSNT: 2075 ni->ni_mllid = meshpeer->peer_llinkid; 2076 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2077 args[0] = ni->ni_mlpid; 2078 args[1] = ni->ni_mllid; 2079 ieee80211_send_action(ni, 2080 IEEE80211_ACTION_CAT_SELF_PROT, 2081 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2082 args); 2083 /* NB: don't setup/clear any timeout */ 2084 break; 2085 case IEEE80211_NODE_MESH_CONFIRMRCV: 2086 if (ni->ni_mlpid != meshpeer->peer_linkid || 2087 ni->ni_mllid != meshpeer->peer_llinkid) { 2088 args[0] = ni->ni_mlpid; 2089 args[1] = ni->ni_mllid; 2090 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2091 ieee80211_send_action(ni, 2092 IEEE80211_ACTION_CAT_SELF_PROT, 2093 IEEE80211_ACTION_MESHPEERING_CLOSE, 2094 args); 2095 mesh_linkchange(ni, 2096 IEEE80211_NODE_MESH_HOLDING); 2097 mesh_peer_timeout_setup(ni); 2098 break; 2099 } 2100 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2101 ni->ni_mllid = meshpeer->peer_llinkid; 2102 args[0] = ni->ni_mlpid; 2103 args[1] = ni->ni_mllid; 2104 ieee80211_send_action(ni, 2105 IEEE80211_ACTION_CAT_SELF_PROT, 2106 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2107 args); 2108 mesh_peer_timeout_stop(ni); 2109 break; 2110 case IEEE80211_NODE_MESH_ESTABLISHED: 2111 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2112 args[0] = ni->ni_mllid; 2113 args[1] = ni->ni_mlpid; 2114 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2115 ieee80211_send_action(ni, 2116 IEEE80211_ACTION_CAT_SELF_PROT, 2117 IEEE80211_ACTION_MESHPEERING_CLOSE, 2118 args); 2119 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2120 mesh_peer_timeout_setup(ni); 2121 break; 2122 } 2123 args[0] = ni->ni_mlpid; 2124 args[1] = ni->ni_mllid; 2125 ieee80211_send_action(ni, 2126 IEEE80211_ACTION_CAT_SELF_PROT, 2127 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2128 args); 2129 break; 2130 case IEEE80211_NODE_MESH_HOLDING: 2131 args[0] = ni->ni_mlpid; 2132 args[1] = meshpeer->peer_llinkid; 2133 /* Standard not clear about what the reaason code should be */ 2134 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2135 ieee80211_send_action(ni, 2136 IEEE80211_ACTION_CAT_SELF_PROT, 2137 IEEE80211_ACTION_MESHPEERING_CLOSE, 2138 args); 2139 break; 2140 } 2141 return 0; 2142} 2143 2144static int 2145mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2146 const struct ieee80211_frame *wh, 2147 const uint8_t *frm, const uint8_t *efrm) 2148{ 2149 struct ieee80211vap *vap = ni->ni_vap; 2150 struct ieee80211_meshpeer_ie ie; 2151 const struct ieee80211_meshpeer_ie *meshpeer; 2152 uint16_t args[3]; 2153 2154 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2155 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2156 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2157 if (meshpeer == NULL) { 2158 return 0; 2159 } 2160 2161 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2162 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2163 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2164 2165 switch (ni->ni_mlstate) { 2166 case IEEE80211_NODE_MESH_OPENRCV: 2167 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2168 mesh_peer_timeout_stop(ni); 2169 break; 2170 case IEEE80211_NODE_MESH_OPENSNT: 2171 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2172 mesh_peer_timeout_setup(ni); 2173 break; 2174 case IEEE80211_NODE_MESH_HOLDING: 2175 args[0] = ni->ni_mlpid; 2176 args[1] = meshpeer->peer_llinkid; 2177 /* Standard not clear about what the reaason code should be */ 2178 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2179 ieee80211_send_action(ni, 2180 IEEE80211_ACTION_CAT_SELF_PROT, 2181 IEEE80211_ACTION_MESHPEERING_CLOSE, 2182 args); 2183 break; 2184 case IEEE80211_NODE_MESH_CONFIRMRCV: 2185 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2186 args[0] = ni->ni_mlpid; 2187 args[1] = ni->ni_mllid; 2188 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2189 ieee80211_send_action(ni, 2190 IEEE80211_ACTION_CAT_SELF_PROT, 2191 IEEE80211_ACTION_MESHPEERING_CLOSE, 2192 args); 2193 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2194 mesh_peer_timeout_setup(ni); 2195 } 2196 break; 2197 default: 2198 IEEE80211_DISCARD(vap, 2199 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2200 wh, NULL, "received confirm in invalid state %d", 2201 ni->ni_mlstate); 2202 vap->iv_stats.is_rx_mgtdiscard++; 2203 break; 2204 } 2205 return 0; 2206} 2207 2208static int 2209mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2210 const struct ieee80211_frame *wh, 2211 const uint8_t *frm, const uint8_t *efrm) 2212{ 2213 struct ieee80211_meshpeer_ie ie; 2214 const struct ieee80211_meshpeer_ie *meshpeer; 2215 uint16_t args[3]; 2216 2217 /* +2 for action + code */ 2218 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2219 IEEE80211_ACTION_MESHPEERING_CLOSE); 2220 if (meshpeer == NULL) { 2221 return 0; 2222 } 2223 2224 /* 2225 * XXX: check reason code, for example we could receive 2226 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2227 * to peer again. 2228 */ 2229 2230 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2231 ni, "%s", "recv PEER CLOSE"); 2232 2233 switch (ni->ni_mlstate) { 2234 case IEEE80211_NODE_MESH_IDLE: 2235 /* ignore */ 2236 break; 2237 case IEEE80211_NODE_MESH_OPENRCV: 2238 case IEEE80211_NODE_MESH_OPENSNT: 2239 case IEEE80211_NODE_MESH_CONFIRMRCV: 2240 case IEEE80211_NODE_MESH_ESTABLISHED: 2241 args[0] = ni->ni_mlpid; 2242 args[1] = ni->ni_mllid; 2243 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2244 ieee80211_send_action(ni, 2245 IEEE80211_ACTION_CAT_SELF_PROT, 2246 IEEE80211_ACTION_MESHPEERING_CLOSE, 2247 args); 2248 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2249 mesh_peer_timeout_setup(ni); 2250 break; 2251 case IEEE80211_NODE_MESH_HOLDING: 2252 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2253 mesh_peer_timeout_stop(ni); 2254 break; 2255 } 2256 return 0; 2257} 2258 2259/* 2260 * Link Metric handling. 2261 */ 2262static int 2263mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2264 const struct ieee80211_frame *wh, 2265 const uint8_t *frm, const uint8_t *efrm) 2266{ 2267 const struct ieee80211_meshlmetric_ie *ie = 2268 (const struct ieee80211_meshlmetric_ie *) 2269 (frm+2); /* action + code */ 2270 struct ieee80211_meshlmetric_ie lm_rep; 2271 2272 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2273 lm_rep.lm_flags = 0; 2274 lm_rep.lm_metric = mesh_airtime_calc(ni); 2275 ieee80211_send_action(ni, 2276 IEEE80211_ACTION_CAT_MESH, 2277 IEEE80211_ACTION_MESH_LMETRIC, 2278 &lm_rep); 2279 } 2280 /* XXX: else do nothing for now */ 2281 return 0; 2282} 2283 2284static int 2285mesh_send_action(struct ieee80211_node *ni, struct mbuf *m) 2286{ 2287 struct ieee80211_bpf_params params; 2288 2289 memset(¶ms, 0, sizeof(params)); 2290 params.ibp_pri = WME_AC_VO; 2291 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2292 /* XXX ucast/mcast */ 2293 params.ibp_try0 = ni->ni_txparms->maxretry; 2294 params.ibp_power = ni->ni_txpower; 2295 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION, 2296 ¶ms); 2297} 2298 2299#define ADDSHORT(frm, v) do { \ 2300 frm[0] = (v) & 0xff; \ 2301 frm[1] = (v) >> 8; \ 2302 frm += 2; \ 2303} while (0) 2304#define ADDWORD(frm, v) do { \ 2305 frm[0] = (v) & 0xff; \ 2306 frm[1] = ((v) >> 8) & 0xff; \ 2307 frm[2] = ((v) >> 16) & 0xff; \ 2308 frm[3] = ((v) >> 24) & 0xff; \ 2309 frm += 4; \ 2310} while (0) 2311 2312static int 2313mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2314 int category, int action, void *args0) 2315{ 2316 struct ieee80211vap *vap = ni->ni_vap; 2317 struct ieee80211com *ic = ni->ni_ic; 2318 uint16_t *args = args0; 2319 const struct ieee80211_rateset *rs; 2320 struct mbuf *m; 2321 uint8_t *frm; 2322 2323 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2324 "send PEER OPEN action: localid 0x%x", args[0]); 2325 2326 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2327 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2328 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2329 ieee80211_ref_node(ni); 2330 2331 m = ieee80211_getmgtframe(&frm, 2332 ic->ic_headroom + sizeof(struct ieee80211_frame), 2333 sizeof(uint16_t) /* action+category */ 2334 + sizeof(uint16_t) /* capabilites */ 2335 + 2 + IEEE80211_RATE_SIZE 2336 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2337 + 2 + IEEE80211_MESHID_LEN 2338 + sizeof(struct ieee80211_meshconf_ie) 2339 + sizeof(struct ieee80211_meshpeer_ie) 2340 ); 2341 if (m != NULL) { 2342 /* 2343 * mesh peer open action frame format: 2344 * [1] category 2345 * [1] action 2346 * [2] capabilities 2347 * [tlv] rates 2348 * [tlv] xrates 2349 * [tlv] mesh id 2350 * [tlv] mesh conf 2351 * [tlv] mesh peer link mgmt 2352 */ 2353 *frm++ = category; 2354 *frm++ = action; 2355 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2356 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2357 frm = ieee80211_add_rates(frm, rs); 2358 frm = ieee80211_add_xrates(frm, rs); 2359 frm = ieee80211_add_meshid(frm, vap); 2360 frm = ieee80211_add_meshconf(frm, vap); 2361 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2362 args[0], 0, 0); 2363 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2364 return mesh_send_action(ni, m); 2365 } else { 2366 vap->iv_stats.is_tx_nobuf++; 2367 ieee80211_free_node(ni); 2368 return ENOMEM; 2369 } 2370} 2371 2372static int 2373mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2374 int category, int action, void *args0) 2375{ 2376 struct ieee80211vap *vap = ni->ni_vap; 2377 struct ieee80211com *ic = ni->ni_ic; 2378 uint16_t *args = args0; 2379 const struct ieee80211_rateset *rs; 2380 struct mbuf *m; 2381 uint8_t *frm; 2382 2383 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2384 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2385 args[0], args[1]); 2386 2387 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2388 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2389 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2390 ieee80211_ref_node(ni); 2391 2392 m = ieee80211_getmgtframe(&frm, 2393 ic->ic_headroom + sizeof(struct ieee80211_frame), 2394 sizeof(uint16_t) /* action+category */ 2395 + sizeof(uint16_t) /* capabilites */ 2396 + sizeof(uint16_t) /* status code */ 2397 + sizeof(uint16_t) /* AID */ 2398 + 2 + IEEE80211_RATE_SIZE 2399 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2400 + 2 + IEEE80211_MESHID_LEN 2401 + sizeof(struct ieee80211_meshconf_ie) 2402 + sizeof(struct ieee80211_meshpeer_ie) 2403 ); 2404 if (m != NULL) { 2405 /* 2406 * mesh peer confirm action frame format: 2407 * [1] category 2408 * [1] action 2409 * [2] capabilities 2410 * [2] status code 2411 * [2] association id (peer ID) 2412 * [tlv] rates 2413 * [tlv] xrates 2414 * [tlv] mesh id 2415 * [tlv] mesh conf 2416 * [tlv] mesh peer link mgmt 2417 */ 2418 *frm++ = category; 2419 *frm++ = action; 2420 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2421 ADDSHORT(frm, 0); /* status code */ 2422 ADDSHORT(frm, args[1]); /* AID */ 2423 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2424 frm = ieee80211_add_rates(frm, rs); 2425 frm = ieee80211_add_xrates(frm, rs); 2426 frm = ieee80211_add_meshid(frm, vap); 2427 frm = ieee80211_add_meshconf(frm, vap); 2428 frm = ieee80211_add_meshpeer(frm, 2429 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2430 args[0], args[1], 0); 2431 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2432 return mesh_send_action(ni, m); 2433 } else { 2434 vap->iv_stats.is_tx_nobuf++; 2435 ieee80211_free_node(ni); 2436 return ENOMEM; 2437 } 2438} 2439 2440static int 2441mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2442 int category, int action, void *args0) 2443{ 2444 struct ieee80211vap *vap = ni->ni_vap; 2445 struct ieee80211com *ic = ni->ni_ic; 2446 uint16_t *args = args0; 2447 struct mbuf *m; 2448 uint8_t *frm; 2449 2450 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2451 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2452 args[0], args[1], args[2]); 2453 2454 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2455 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2456 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2457 ieee80211_ref_node(ni); 2458 2459 m = ieee80211_getmgtframe(&frm, 2460 ic->ic_headroom + sizeof(struct ieee80211_frame), 2461 sizeof(uint16_t) /* action+category */ 2462 + sizeof(uint16_t) /* reason code */ 2463 + 2 + IEEE80211_MESHID_LEN 2464 + sizeof(struct ieee80211_meshpeer_ie) 2465 ); 2466 if (m != NULL) { 2467 /* 2468 * mesh peer close action frame format: 2469 * [1] category 2470 * [1] action 2471 * [tlv] mesh id 2472 * [tlv] mesh peer link mgmt 2473 */ 2474 *frm++ = category; 2475 *frm++ = action; 2476 frm = ieee80211_add_meshid(frm, vap); 2477 frm = ieee80211_add_meshpeer(frm, 2478 IEEE80211_ACTION_MESHPEERING_CLOSE, 2479 args[0], args[1], args[2]); 2480 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2481 return mesh_send_action(ni, m); 2482 } else { 2483 vap->iv_stats.is_tx_nobuf++; 2484 ieee80211_free_node(ni); 2485 return ENOMEM; 2486 } 2487} 2488 2489static int 2490mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2491 int category, int action, void *arg0) 2492{ 2493 struct ieee80211vap *vap = ni->ni_vap; 2494 struct ieee80211com *ic = ni->ni_ic; 2495 struct ieee80211_meshlmetric_ie *ie = arg0; 2496 struct mbuf *m; 2497 uint8_t *frm; 2498 2499 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2500 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2501 ni, "%s", "send LINK METRIC REQUEST action"); 2502 } else { 2503 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2504 ni, "send LINK METRIC REPLY action: metric 0x%x", 2505 ie->lm_metric); 2506 } 2507 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2508 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2509 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2510 ieee80211_ref_node(ni); 2511 2512 m = ieee80211_getmgtframe(&frm, 2513 ic->ic_headroom + sizeof(struct ieee80211_frame), 2514 sizeof(uint16_t) + /* action+category */ 2515 sizeof(struct ieee80211_meshlmetric_ie) 2516 ); 2517 if (m != NULL) { 2518 /* 2519 * mesh link metric 2520 * [1] category 2521 * [1] action 2522 * [tlv] mesh link metric 2523 */ 2524 *frm++ = category; 2525 *frm++ = action; 2526 frm = ieee80211_add_meshlmetric(frm, 2527 ie->lm_flags, ie->lm_metric); 2528 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2529 return mesh_send_action(ni, m); 2530 } else { 2531 vap->iv_stats.is_tx_nobuf++; 2532 ieee80211_free_node(ni); 2533 return ENOMEM; 2534 } 2535} 2536 2537static void 2538mesh_peer_timeout_setup(struct ieee80211_node *ni) 2539{ 2540 switch (ni->ni_mlstate) { 2541 case IEEE80211_NODE_MESH_HOLDING: 2542 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 2543 break; 2544 case IEEE80211_NODE_MESH_CONFIRMRCV: 2545 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 2546 break; 2547 case IEEE80211_NODE_MESH_IDLE: 2548 ni->ni_mltval = 0; 2549 break; 2550 default: 2551 ni->ni_mltval = ieee80211_mesh_retrytimeout; 2552 break; 2553 } 2554 if (ni->ni_mltval) 2555 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2556 mesh_peer_timeout_cb, ni); 2557} 2558 2559/* 2560 * Same as above but backoffs timer statisically 50%. 2561 */ 2562static void 2563mesh_peer_timeout_backoff(struct ieee80211_node *ni) 2564{ 2565 uint32_t r; 2566 2567 r = arc4random(); 2568 ni->ni_mltval += r % ni->ni_mltval; 2569 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 2570 ni); 2571} 2572 2573static __inline void 2574mesh_peer_timeout_stop(struct ieee80211_node *ni) 2575{ 2576 callout_drain(&ni->ni_mltimer); 2577} 2578 2579/* 2580 * Mesh Peer Link Management FSM timeout handling. 2581 */ 2582static void 2583mesh_peer_timeout_cb(void *arg) 2584{ 2585 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 2586 uint16_t args[3]; 2587 2588 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 2589 ni, "mesh link timeout, state %d, retry counter %d", 2590 ni->ni_mlstate, ni->ni_mlrcnt); 2591 2592 switch (ni->ni_mlstate) { 2593 case IEEE80211_NODE_MESH_IDLE: 2594 case IEEE80211_NODE_MESH_ESTABLISHED: 2595 break; 2596 case IEEE80211_NODE_MESH_OPENSNT: 2597 case IEEE80211_NODE_MESH_OPENRCV: 2598 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 2599 args[0] = ni->ni_mlpid; 2600 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 2601 ieee80211_send_action(ni, 2602 IEEE80211_ACTION_CAT_SELF_PROT, 2603 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2604 ni->ni_mlrcnt = 0; 2605 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2606 mesh_peer_timeout_setup(ni); 2607 } else { 2608 args[0] = ni->ni_mlpid; 2609 ieee80211_send_action(ni, 2610 IEEE80211_ACTION_CAT_SELF_PROT, 2611 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2612 ni->ni_mlrcnt++; 2613 mesh_peer_timeout_backoff(ni); 2614 } 2615 break; 2616 case IEEE80211_NODE_MESH_CONFIRMRCV: 2617 args[0] = ni->ni_mlpid; 2618 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 2619 ieee80211_send_action(ni, 2620 IEEE80211_ACTION_CAT_SELF_PROT, 2621 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2622 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2623 mesh_peer_timeout_setup(ni); 2624 break; 2625 case IEEE80211_NODE_MESH_HOLDING: 2626 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2627 break; 2628 } 2629} 2630 2631static int 2632mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 2633{ 2634 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2635 2636 if (ie == NULL || ie[1] != ms->ms_idlen) 2637 return 1; 2638 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 2639} 2640 2641/* 2642 * Check if we are using the same algorithms for this mesh. 2643 */ 2644static int 2645mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 2646{ 2647 const struct ieee80211_meshconf_ie *meshconf = 2648 (const struct ieee80211_meshconf_ie *) ie; 2649 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 2650 2651 if (meshconf == NULL) 2652 return 1; 2653 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 2654 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2655 "unknown path selection algorithm: 0x%x\n", 2656 meshconf->conf_pselid); 2657 return 1; 2658 } 2659 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 2660 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2661 "unknown path metric algorithm: 0x%x\n", 2662 meshconf->conf_pmetid); 2663 return 1; 2664 } 2665 if (meshconf->conf_ccid != 0) { 2666 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2667 "unknown congestion control algorithm: 0x%x\n", 2668 meshconf->conf_ccid); 2669 return 1; 2670 } 2671 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 2672 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2673 "unknown sync algorithm: 0x%x\n", 2674 meshconf->conf_syncid); 2675 return 1; 2676 } 2677 if (meshconf->conf_authid != 0) { 2678 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2679 "unknown auth auth algorithm: 0x%x\n", 2680 meshconf->conf_pselid); 2681 return 1; 2682 } 2683 /* Not accepting peers */ 2684 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 2685 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2686 "not accepting peers: 0x%x\n", meshconf->conf_cap); 2687 return 1; 2688 } 2689 return 0; 2690} 2691 2692static int 2693mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 2694 const uint8_t *ie) 2695{ 2696 const struct ieee80211_meshpeer_ie *meshpeer = 2697 (const struct ieee80211_meshpeer_ie *) ie; 2698 2699 if (meshpeer == NULL || 2700 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 2701 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 2702 return 1; 2703 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 2704 IEEE80211_DPRINTF(vap, 2705 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2706 "Only MPM protocol is supported (proto: 0x%02X)", 2707 meshpeer->peer_proto); 2708 return 1; 2709 } 2710 switch (subtype) { 2711 case IEEE80211_ACTION_MESHPEERING_OPEN: 2712 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 2713 return 1; 2714 break; 2715 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2716 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 2717 return 1; 2718 break; 2719 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2720 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 2721 return 1; 2722 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 2723 meshpeer->peer_linkid != 0) 2724 return 1; 2725 if (meshpeer->peer_rcode == 0) 2726 return 1; 2727 break; 2728 } 2729 return 0; 2730} 2731 2732/* 2733 * Add a Mesh ID IE to a frame. 2734 */ 2735uint8_t * 2736ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 2737{ 2738 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2739 2740 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 2741 2742 *frm++ = IEEE80211_ELEMID_MESHID; 2743 *frm++ = ms->ms_idlen; 2744 memcpy(frm, ms->ms_id, ms->ms_idlen); 2745 return frm + ms->ms_idlen; 2746} 2747 2748/* 2749 * Add a Mesh Configuration IE to a frame. 2750 * For now just use HWMP routing, Airtime link metric, Null Congestion 2751 * Signaling, Null Sync Protocol and Null Authentication. 2752 */ 2753uint8_t * 2754ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 2755{ 2756 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 2757 uint16_t caps; 2758 2759 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 2760 2761 *frm++ = IEEE80211_ELEMID_MESHCONF; 2762 *frm++ = IEEE80211_MESH_CONF_SZ; 2763 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 2764 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 2765 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 2766 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 2767 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 2768 /* NB: set the number of neighbors before the rest */ 2769 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 2770 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 2771 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 2772 *frm |= IEEE80211_MESHCONF_FORM_GATE; 2773 frm += 1; 2774 caps = 0; 2775 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 2776 caps |= IEEE80211_MESHCONF_CAP_AP; 2777 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 2778 caps |= IEEE80211_MESHCONF_CAP_FWRD; 2779 *frm++ = caps; 2780 return frm; 2781} 2782 2783/* 2784 * Add a Mesh Peer Management IE to a frame. 2785 */ 2786uint8_t * 2787ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 2788 uint16_t peerid, uint16_t reason) 2789{ 2790 2791 KASSERT(localid != 0, ("localid == 0")); 2792 2793 *frm++ = IEEE80211_ELEMID_MESHPEER; 2794 switch (subtype) { 2795 case IEEE80211_ACTION_MESHPEERING_OPEN: 2796 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 2797 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 2798 ADDSHORT(frm, localid); /* local ID */ 2799 break; 2800 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2801 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 2802 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 2803 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 2804 ADDSHORT(frm, localid); /* local ID */ 2805 ADDSHORT(frm, peerid); /* peer ID */ 2806 break; 2807 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2808 if (peerid) 2809 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 2810 else 2811 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 2812 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 2813 ADDSHORT(frm, localid); /* local ID */ 2814 if (peerid) 2815 ADDSHORT(frm, peerid); /* peer ID */ 2816 ADDSHORT(frm, reason); 2817 break; 2818 } 2819 return frm; 2820} 2821 2822/* 2823 * Compute an Airtime Link Metric for the link with this node. 2824 * 2825 * Based on Draft 3.0 spec (11B.10, p.149). 2826 */ 2827/* 2828 * Max 802.11s overhead. 2829 */ 2830#define IEEE80211_MESH_MAXOVERHEAD \ 2831 (sizeof(struct ieee80211_qosframe_addr4) \ 2832 + sizeof(struct ieee80211_meshcntl_ae10) \ 2833 + sizeof(struct llc) \ 2834 + IEEE80211_ADDR_LEN \ 2835 + IEEE80211_WEP_IVLEN \ 2836 + IEEE80211_WEP_KIDLEN \ 2837 + IEEE80211_WEP_CRCLEN \ 2838 + IEEE80211_WEP_MICLEN \ 2839 + IEEE80211_CRC_LEN) 2840uint32_t 2841mesh_airtime_calc(struct ieee80211_node *ni) 2842{ 2843#define M_BITS 8 2844#define S_FACTOR (2 * M_BITS) 2845 struct ieee80211com *ic = ni->ni_ic; 2846 struct ifnet *ifp = ni->ni_vap->iv_ifp; 2847 const static int nbits = 8192 << M_BITS; 2848 uint32_t overhead, rate, errrate; 2849 uint64_t res; 2850 2851 /* Time to transmit a frame */ 2852 rate = ni->ni_txrate; 2853 overhead = ieee80211_compute_duration(ic->ic_rt, 2854 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 2855 /* Error rate in percentage */ 2856 /* XXX assuming small failures are ok */ 2857 errrate = (((ifp->if_oerrors + 2858 ifp->if_ierrors) / 100) << M_BITS) / 100; 2859 res = (overhead + (nbits / rate)) * 2860 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 2861 2862 return (uint32_t)(res >> S_FACTOR); 2863#undef M_BITS 2864#undef S_FACTOR 2865} 2866 2867/* 2868 * Add a Mesh Link Metric report IE to a frame. 2869 */ 2870uint8_t * 2871ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 2872{ 2873 *frm++ = IEEE80211_ELEMID_MESHLINK; 2874 *frm++ = 5; 2875 *frm++ = flags; 2876 ADDWORD(frm, metric); 2877 return frm; 2878} 2879#undef ADDSHORT 2880#undef ADDWORD 2881 2882/* 2883 * Initialize any mesh-specific node state. 2884 */ 2885void 2886ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 2887{ 2888 ni->ni_flags |= IEEE80211_NODE_QOS; 2889 callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE); 2890} 2891 2892/* 2893 * Cleanup any mesh-specific node state. 2894 */ 2895void 2896ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 2897{ 2898 struct ieee80211vap *vap = ni->ni_vap; 2899 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2900 2901 callout_drain(&ni->ni_mltimer); 2902 /* NB: short-circuit callbacks after mesh_vdetach */ 2903 if (vap->iv_mesh != NULL) 2904 ms->ms_ppath->mpp_peerdown(ni); 2905} 2906 2907void 2908ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 2909{ 2910 ni->ni_meshidlen = ie[1]; 2911 memcpy(ni->ni_meshid, ie + 2, ie[1]); 2912} 2913 2914/* 2915 * Setup mesh-specific node state on neighbor discovery. 2916 */ 2917void 2918ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 2919 const struct ieee80211_frame *wh, 2920 const struct ieee80211_scanparams *sp) 2921{ 2922 ieee80211_parse_meshid(ni, sp->meshid); 2923} 2924 2925void 2926ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 2927 struct ieee80211_beacon_offsets *bo) 2928{ 2929 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 2930 2931 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 2932 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 2933 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 2934 } 2935} 2936 2937static int 2938mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 2939{ 2940 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2941 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 2942 struct ieee80211_mesh_route *rt; 2943 struct ieee80211req_mesh_route *imr; 2944 size_t len, off; 2945 uint8_t *p; 2946 int error; 2947 2948 if (vap->iv_opmode != IEEE80211_M_MBSS) 2949 return ENOSYS; 2950 2951 error = 0; 2952 switch (ireq->i_type) { 2953 case IEEE80211_IOC_MESH_ID: 2954 ireq->i_len = ms->ms_idlen; 2955 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 2956 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 2957 break; 2958 case IEEE80211_IOC_MESH_AP: 2959 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 2960 break; 2961 case IEEE80211_IOC_MESH_FWRD: 2962 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 2963 break; 2964 case IEEE80211_IOC_MESH_GATE: 2965 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 2966 break; 2967 case IEEE80211_IOC_MESH_TTL: 2968 ireq->i_val = ms->ms_ttl; 2969 break; 2970 case IEEE80211_IOC_MESH_RTCMD: 2971 switch (ireq->i_val) { 2972 case IEEE80211_MESH_RTCMD_LIST: 2973 len = 0; 2974 MESH_RT_LOCK(ms); 2975 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 2976 len += sizeof(*imr); 2977 } 2978 MESH_RT_UNLOCK(ms); 2979 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 2980 ireq->i_len = len; 2981 return ENOMEM; 2982 } 2983 ireq->i_len = len; 2984 /* XXX M_WAIT? */ 2985 p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO); 2986 if (p == NULL) 2987 return ENOMEM; 2988 off = 0; 2989 MESH_RT_LOCK(ms); 2990 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 2991 if (off >= len) 2992 break; 2993 imr = (struct ieee80211req_mesh_route *) 2994 (p + off); 2995 IEEE80211_ADDR_COPY(imr->imr_dest, 2996 rt->rt_dest); 2997 IEEE80211_ADDR_COPY(imr->imr_nexthop, 2998 rt->rt_nexthop); 2999 imr->imr_metric = rt->rt_metric; 3000 imr->imr_nhops = rt->rt_nhops; 3001 imr->imr_lifetime = 3002 ieee80211_mesh_rt_update(rt, 0); 3003 imr->imr_lastmseq = rt->rt_lastmseq; 3004 imr->imr_flags = rt->rt_flags; /* last */ 3005 off += sizeof(*imr); 3006 } 3007 MESH_RT_UNLOCK(ms); 3008 error = copyout(p, (uint8_t *)ireq->i_data, 3009 ireq->i_len); 3010 free(p, M_TEMP); 3011 break; 3012 case IEEE80211_MESH_RTCMD_FLUSH: 3013 case IEEE80211_MESH_RTCMD_ADD: 3014 case IEEE80211_MESH_RTCMD_DELETE: 3015 return EINVAL; 3016 default: 3017 return ENOSYS; 3018 } 3019 break; 3020 case IEEE80211_IOC_MESH_PR_METRIC: 3021 len = strlen(ms->ms_pmetric->mpm_descr); 3022 if (ireq->i_len < len) 3023 return EINVAL; 3024 ireq->i_len = len; 3025 error = copyout(ms->ms_pmetric->mpm_descr, 3026 (uint8_t *)ireq->i_data, len); 3027 break; 3028 case IEEE80211_IOC_MESH_PR_PATH: 3029 len = strlen(ms->ms_ppath->mpp_descr); 3030 if (ireq->i_len < len) 3031 return EINVAL; 3032 ireq->i_len = len; 3033 error = copyout(ms->ms_ppath->mpp_descr, 3034 (uint8_t *)ireq->i_data, len); 3035 break; 3036 default: 3037 return ENOSYS; 3038 } 3039 3040 return error; 3041} 3042IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3043 3044static int 3045mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3046{ 3047 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3048 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3049 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3050 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3051 int error; 3052 3053 if (vap->iv_opmode != IEEE80211_M_MBSS) 3054 return ENOSYS; 3055 3056 error = 0; 3057 switch (ireq->i_type) { 3058 case IEEE80211_IOC_MESH_ID: 3059 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3060 return EINVAL; 3061 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3062 if (error != 0) 3063 break; 3064 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3065 ms->ms_idlen = ireq->i_len; 3066 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3067 error = ENETRESET; 3068 break; 3069 case IEEE80211_IOC_MESH_AP: 3070 if (ireq->i_val) 3071 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3072 else 3073 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3074 error = ENETRESET; 3075 break; 3076 case IEEE80211_IOC_MESH_FWRD: 3077 if (ireq->i_val) 3078 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3079 else 3080 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3081 break; 3082 case IEEE80211_IOC_MESH_GATE: 3083 if (ireq->i_val) 3084 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3085 else 3086 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3087 break; 3088 case IEEE80211_IOC_MESH_TTL: 3089 ms->ms_ttl = (uint8_t) ireq->i_val; 3090 break; 3091 case IEEE80211_IOC_MESH_RTCMD: 3092 switch (ireq->i_val) { 3093 case IEEE80211_MESH_RTCMD_LIST: 3094 return EINVAL; 3095 case IEEE80211_MESH_RTCMD_FLUSH: 3096 ieee80211_mesh_rt_flush(vap); 3097 break; 3098 case IEEE80211_MESH_RTCMD_ADD: 3099 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3100 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3101 return EINVAL; 3102 error = copyin(ireq->i_data, &tmpaddr, 3103 IEEE80211_ADDR_LEN); 3104 if (error == 0) 3105 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3106 break; 3107 case IEEE80211_MESH_RTCMD_DELETE: 3108 ieee80211_mesh_rt_del(vap, ireq->i_data); 3109 break; 3110 default: 3111 return ENOSYS; 3112 } 3113 break; 3114 case IEEE80211_IOC_MESH_PR_METRIC: 3115 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3116 if (error == 0) { 3117 error = mesh_select_proto_metric(vap, tmpproto); 3118 if (error == 0) 3119 error = ENETRESET; 3120 } 3121 break; 3122 case IEEE80211_IOC_MESH_PR_PATH: 3123 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3124 if (error == 0) { 3125 error = mesh_select_proto_path(vap, tmpproto); 3126 if (error == 0) 3127 error = ENETRESET; 3128 } 3129 break; 3130 default: 3131 return ENOSYS; 3132 } 3133 return error; 3134} 3135IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3136