ieee80211_mesh.c revision 260718
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 260718 2014-01-16 13:44:47Z glebius $"); 32#endif 33 34/* 35 * IEEE 802.11s Mesh Point (MBSS) support. 36 * 37 * Based on March 2009, D3.0 802.11s draft spec. 38 */ 39#include "opt_inet.h" 40#include "opt_wlan.h" 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/mbuf.h> 45#include <sys/malloc.h> 46#include <sys/kernel.h> 47 48#include <sys/socket.h> 49#include <sys/sockio.h> 50#include <sys/endian.h> 51#include <sys/errno.h> 52#include <sys/proc.h> 53#include <sys/sysctl.h> 54 55#include <net/bpf.h> 56#include <net/if.h> 57#include <net/if_var.h> 58#include <net/if_media.h> 59#include <net/if_llc.h> 60#include <net/ethernet.h> 61 62#include <net80211/ieee80211_var.h> 63#include <net80211/ieee80211_action.h> 64#ifdef IEEE80211_SUPPORT_SUPERG 65#include <net80211/ieee80211_superg.h> 66#endif 67#include <net80211/ieee80211_input.h> 68#include <net80211/ieee80211_mesh.h> 69 70static void mesh_rt_flush_invalid(struct ieee80211vap *); 71static int mesh_select_proto_path(struct ieee80211vap *, const char *); 72static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 73static void mesh_vattach(struct ieee80211vap *); 74static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 75static void mesh_rt_cleanup_cb(void *); 76static void mesh_gatemode_setup(struct ieee80211vap *); 77static void mesh_gatemode_cb(void *); 78static void mesh_linkchange(struct ieee80211_node *, 79 enum ieee80211_mesh_mlstate); 80static void mesh_checkid(void *, struct ieee80211_node *); 81static uint32_t mesh_generateid(struct ieee80211vap *); 82static int mesh_checkpseq(struct ieee80211vap *, 83 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 84static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, 85 struct ieee80211_mesh_route *); 86static void mesh_forward(struct ieee80211vap *, struct mbuf *, 87 const struct ieee80211_meshcntl *); 88static int mesh_input(struct ieee80211_node *, struct mbuf *, int, int); 89static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 90 int, int); 91static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 92static void mesh_peer_timeout_setup(struct ieee80211_node *); 93static void mesh_peer_timeout_backoff(struct ieee80211_node *); 94static void mesh_peer_timeout_cb(void *); 95static __inline void 96 mesh_peer_timeout_stop(struct ieee80211_node *); 97static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 98static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 99static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 100 const uint8_t *); 101uint32_t mesh_airtime_calc(struct ieee80211_node *); 102 103/* 104 * Timeout values come from the specification and are in milliseconds. 105 */ 106static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 107 "IEEE 802.11s parameters"); 108static int ieee80211_mesh_gateint = -1; 109SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW, 110 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 111 "mesh gate interval (ms)"); 112static int ieee80211_mesh_retrytimeout = -1; 113SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, 114 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 115 "Retry timeout (msec)"); 116static int ieee80211_mesh_holdingtimeout = -1; 117 118SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, 119 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 120 "Holding state timeout (msec)"); 121static int ieee80211_mesh_confirmtimeout = -1; 122SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, 123 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 124 "Confirm state timeout (msec)"); 125static int ieee80211_mesh_backofftimeout = -1; 126SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW, 127 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 128 "Backoff timeout (msec). This is to throutles peering forever when " 129 "not receving answer or is rejected by a neighbor"); 130static int ieee80211_mesh_maxretries = 2; 131SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW, 132 &ieee80211_mesh_maxretries, 0, 133 "Maximum retries during peer link establishment"); 134static int ieee80211_mesh_maxholding = 2; 135SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLTYPE_INT | CTLFLAG_RW, 136 &ieee80211_mesh_maxholding, 0, 137 "Maximum times we are allowed to transition to HOLDING state before " 138 "backinoff during peer link establishment"); 139 140static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 141 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 142 143static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 144static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 145static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 146static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 147static ieee80211_recv_action_func mesh_recv_action_meshgate; 148 149static ieee80211_send_action_func mesh_send_action_meshpeering_open; 150static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 151static ieee80211_send_action_func mesh_send_action_meshpeering_close; 152static ieee80211_send_action_func mesh_send_action_meshlmetric; 153static ieee80211_send_action_func mesh_send_action_meshgate; 154 155static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 156 .mpm_descr = "AIRTIME", 157 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 158 .mpm_metric = mesh_airtime_calc, 159}; 160 161static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 162static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 163 164#define RT_ENTRY_LOCK(rt) mtx_lock(&(rt)->rt_lock) 165#define RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED) 166#define RT_ENTRY_UNLOCK(rt) mtx_unlock(&(rt)->rt_lock) 167 168#define MESH_RT_LOCK(ms) mtx_lock(&(ms)->ms_rt_lock) 169#define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED) 170#define MESH_RT_UNLOCK(ms) mtx_unlock(&(ms)->ms_rt_lock) 171 172MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 173MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 174MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 175 176/* The longer one of the lifetime should be stored as new lifetime */ 177#define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 178 179MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 180MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 181 182/* 183 * Helper functions to manipulate the Mesh routing table. 184 */ 185 186static struct ieee80211_mesh_route * 187mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 188 const uint8_t dest[IEEE80211_ADDR_LEN]) 189{ 190 struct ieee80211_mesh_route *rt; 191 192 MESH_RT_LOCK_ASSERT(ms); 193 194 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 195 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 196 return rt; 197 } 198 return NULL; 199} 200 201static struct ieee80211_mesh_route * 202mesh_rt_add_locked(struct ieee80211vap *vap, 203 const uint8_t dest[IEEE80211_ADDR_LEN]) 204{ 205 struct ieee80211_mesh_state *ms = vap->iv_mesh; 206 struct ieee80211_mesh_route *rt; 207 208 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 209 ("%s: adding broadcast to the routing table", __func__)); 210 211 MESH_RT_LOCK_ASSERT(ms); 212 213 rt = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) + 214 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | M_ZERO); 215 if (rt != NULL) { 216 rt->rt_vap = vap; 217 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 218 rt->rt_priv = (void *)ALIGN(&rt[1]); 219 mtx_init(&rt->rt_lock, "MBSS_RT", "802.11s route entry", MTX_DEF); 220 callout_init(&rt->rt_discovery, CALLOUT_MPSAFE); 221 rt->rt_updtime = ticks; /* create time */ 222 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 223 } 224 return rt; 225} 226 227struct ieee80211_mesh_route * 228ieee80211_mesh_rt_find(struct ieee80211vap *vap, 229 const uint8_t dest[IEEE80211_ADDR_LEN]) 230{ 231 struct ieee80211_mesh_state *ms = vap->iv_mesh; 232 struct ieee80211_mesh_route *rt; 233 234 MESH_RT_LOCK(ms); 235 rt = mesh_rt_find_locked(ms, dest); 236 MESH_RT_UNLOCK(ms); 237 return rt; 238} 239 240struct ieee80211_mesh_route * 241ieee80211_mesh_rt_add(struct ieee80211vap *vap, 242 const uint8_t dest[IEEE80211_ADDR_LEN]) 243{ 244 struct ieee80211_mesh_state *ms = vap->iv_mesh; 245 struct ieee80211_mesh_route *rt; 246 247 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 248 ("%s: duplicate entry in the routing table", __func__)); 249 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 250 ("%s: adding self to the routing table", __func__)); 251 252 MESH_RT_LOCK(ms); 253 rt = mesh_rt_add_locked(vap, dest); 254 MESH_RT_UNLOCK(ms); 255 return rt; 256} 257 258/* 259 * Update the route lifetime and returns the updated lifetime. 260 * If new_lifetime is zero and route is timedout it will be invalidated. 261 * new_lifetime is in msec 262 */ 263int 264ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 265{ 266 int timesince, now; 267 uint32_t lifetime = 0; 268 269 KASSERT(rt != NULL, ("route is NULL")); 270 271 now = ticks; 272 RT_ENTRY_LOCK(rt); 273 274 /* dont clobber a proxy entry gated by us */ 275 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 276 RT_ENTRY_UNLOCK(rt); 277 return rt->rt_lifetime; 278 } 279 280 timesince = ticks_to_msecs(now - rt->rt_updtime); 281 rt->rt_updtime = now; 282 if (timesince >= rt->rt_lifetime) { 283 if (new_lifetime != 0) { 284 rt->rt_lifetime = new_lifetime; 285 } 286 else { 287 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 288 rt->rt_lifetime = 0; 289 } 290 } else { 291 /* update what is left of lifetime */ 292 rt->rt_lifetime = rt->rt_lifetime - timesince; 293 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 294 new_lifetime, rt->rt_lifetime); 295 } 296 lifetime = rt->rt_lifetime; 297 RT_ENTRY_UNLOCK(rt); 298 299 return lifetime; 300} 301 302/* 303 * Add a proxy route (as needed) for the specified destination. 304 */ 305void 306ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 307 const uint8_t dest[IEEE80211_ADDR_LEN]) 308{ 309 struct ieee80211_mesh_state *ms = vap->iv_mesh; 310 struct ieee80211_mesh_route *rt; 311 312 MESH_RT_LOCK(ms); 313 rt = mesh_rt_find_locked(ms, dest); 314 if (rt == NULL) { 315 rt = mesh_rt_add_locked(vap, dest); 316 if (rt == NULL) { 317 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 318 "%s", "unable to add proxy entry"); 319 vap->iv_stats.is_mesh_rtaddfailed++; 320 } else { 321 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 322 "%s", "add proxy entry"); 323 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 324 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 325 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 326 | IEEE80211_MESHRT_FLAGS_PROXY; 327 } 328 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 329 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 330 ("no proxy flag for poxy entry")); 331 struct ieee80211com *ic = vap->iv_ic; 332 /* 333 * Fix existing entry created by received frames from 334 * stations that have some memory of dest. We also 335 * flush any frames held on the staging queue; delivering 336 * them is too much trouble right now. 337 */ 338 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 339 "%s", "fix proxy entry"); 340 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 341 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 342 | IEEE80211_MESHRT_FLAGS_PROXY; 343 /* XXX belongs in hwmp */ 344 ieee80211_ageq_drain_node(&ic->ic_stageq, 345 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 346 /* XXX stat? */ 347 } 348 MESH_RT_UNLOCK(ms); 349} 350 351static __inline void 352mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 353{ 354 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 355 /* 356 * Grab the lock before destroying it, to be sure no one else 357 * is holding the route. 358 */ 359 RT_ENTRY_LOCK(rt); 360 callout_drain(&rt->rt_discovery); 361 mtx_destroy(&rt->rt_lock); 362 free(rt, M_80211_MESH_RT); 363} 364 365void 366ieee80211_mesh_rt_del(struct ieee80211vap *vap, 367 const uint8_t dest[IEEE80211_ADDR_LEN]) 368{ 369 struct ieee80211_mesh_state *ms = vap->iv_mesh; 370 struct ieee80211_mesh_route *rt, *next; 371 372 MESH_RT_LOCK(ms); 373 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 374 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 375 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 376 ms->ms_ppath->mpp_senderror(vap, dest, rt, 377 IEEE80211_REASON_MESH_PERR_NO_PROXY); 378 } else { 379 ms->ms_ppath->mpp_senderror(vap, dest, rt, 380 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 381 } 382 mesh_rt_del(ms, rt); 383 MESH_RT_UNLOCK(ms); 384 return; 385 } 386 } 387 MESH_RT_UNLOCK(ms); 388} 389 390void 391ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 392{ 393 struct ieee80211_mesh_state *ms = vap->iv_mesh; 394 struct ieee80211_mesh_route *rt, *next; 395 396 if (ms == NULL) 397 return; 398 MESH_RT_LOCK(ms); 399 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 400 mesh_rt_del(ms, rt); 401 MESH_RT_UNLOCK(ms); 402} 403 404void 405ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 406 const uint8_t peer[IEEE80211_ADDR_LEN]) 407{ 408 struct ieee80211_mesh_state *ms = vap->iv_mesh; 409 struct ieee80211_mesh_route *rt, *next; 410 411 MESH_RT_LOCK(ms); 412 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 413 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 414 mesh_rt_del(ms, rt); 415 } 416 MESH_RT_UNLOCK(ms); 417} 418 419/* 420 * Flush expired routing entries, i.e. those in invalid state for 421 * some time. 422 */ 423static void 424mesh_rt_flush_invalid(struct ieee80211vap *vap) 425{ 426 struct ieee80211_mesh_state *ms = vap->iv_mesh; 427 struct ieee80211_mesh_route *rt, *next; 428 429 if (ms == NULL) 430 return; 431 MESH_RT_LOCK(ms); 432 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 433 /* Discover paths will be deleted by their own callout */ 434 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 435 continue; 436 ieee80211_mesh_rt_update(rt, 0); 437 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 438 mesh_rt_del(ms, rt); 439 } 440 MESH_RT_UNLOCK(ms); 441} 442 443#define N(a) (sizeof(a) / sizeof(a[0])) 444int 445ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 446{ 447 int i, firstempty = -1; 448 449 for (i = 0; i < N(mesh_proto_paths); i++) { 450 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 451 IEEE80211_MESH_PROTO_DSZ) == 0) 452 return EEXIST; 453 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 454 firstempty = i; 455 } 456 if (firstempty < 0) 457 return ENOSPC; 458 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 459 mesh_proto_paths[firstempty].mpp_active = 1; 460 return 0; 461} 462 463int 464ieee80211_mesh_register_proto_metric(const struct 465 ieee80211_mesh_proto_metric *mpm) 466{ 467 int i, firstempty = -1; 468 469 for (i = 0; i < N(mesh_proto_metrics); i++) { 470 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 471 IEEE80211_MESH_PROTO_DSZ) == 0) 472 return EEXIST; 473 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 474 firstempty = i; 475 } 476 if (firstempty < 0) 477 return ENOSPC; 478 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 479 mesh_proto_metrics[firstempty].mpm_active = 1; 480 return 0; 481} 482 483static int 484mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 485{ 486 struct ieee80211_mesh_state *ms = vap->iv_mesh; 487 int i; 488 489 for (i = 0; i < N(mesh_proto_paths); i++) { 490 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 491 ms->ms_ppath = &mesh_proto_paths[i]; 492 return 0; 493 } 494 } 495 return ENOENT; 496} 497 498static int 499mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 500{ 501 struct ieee80211_mesh_state *ms = vap->iv_mesh; 502 int i; 503 504 for (i = 0; i < N(mesh_proto_metrics); i++) { 505 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 506 ms->ms_pmetric = &mesh_proto_metrics[i]; 507 return 0; 508 } 509 } 510 return ENOENT; 511} 512#undef N 513 514static void 515mesh_gatemode_setup(struct ieee80211vap *vap) 516{ 517 struct ieee80211_mesh_state *ms = vap->iv_mesh; 518 519 /* 520 * NB: When a mesh gate is running as a ROOT it shall 521 * not send out periodic GANNs but instead mark the 522 * mesh gate flag for the corresponding proactive PREQ 523 * and RANN frames. 524 */ 525 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 526 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 527 callout_drain(&ms->ms_gatetimer); 528 return ; 529 } 530 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 531 mesh_gatemode_cb, vap); 532} 533 534static void 535mesh_gatemode_cb(void *arg) 536{ 537 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 538 struct ieee80211_mesh_state *ms = vap->iv_mesh; 539 struct ieee80211_meshgann_ie gann; 540 541 gann.gann_flags = 0; /* Reserved */ 542 gann.gann_hopcount = 0; 543 gann.gann_ttl = ms->ms_ttl; 544 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 545 gann.gann_seq = ms->ms_gateseq++; 546 gann.gann_interval = ieee80211_mesh_gateint; 547 548 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 549 "send broadcast GANN (seq %u)", gann.gann_seq); 550 551 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 552 IEEE80211_ACTION_MESH_GANN, &gann); 553 mesh_gatemode_setup(vap); 554} 555 556static void 557ieee80211_mesh_init(void) 558{ 559 560 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 561 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 562 563 /* 564 * Setup mesh parameters that depends on the clock frequency. 565 */ 566 ieee80211_mesh_gateint = msecs_to_ticks(10000); 567 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 568 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 569 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 570 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 571 572 /* 573 * Register action frame handlers. 574 */ 575 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 576 IEEE80211_ACTION_MESHPEERING_OPEN, 577 mesh_recv_action_meshpeering_open); 578 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 579 IEEE80211_ACTION_MESHPEERING_CONFIRM, 580 mesh_recv_action_meshpeering_confirm); 581 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 582 IEEE80211_ACTION_MESHPEERING_CLOSE, 583 mesh_recv_action_meshpeering_close); 584 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 585 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 586 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 587 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 588 589 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 590 IEEE80211_ACTION_MESHPEERING_OPEN, 591 mesh_send_action_meshpeering_open); 592 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 593 IEEE80211_ACTION_MESHPEERING_CONFIRM, 594 mesh_send_action_meshpeering_confirm); 595 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 596 IEEE80211_ACTION_MESHPEERING_CLOSE, 597 mesh_send_action_meshpeering_close); 598 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 599 IEEE80211_ACTION_MESH_LMETRIC, 600 mesh_send_action_meshlmetric); 601 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 602 IEEE80211_ACTION_MESH_GANN, 603 mesh_send_action_meshgate); 604 605 /* 606 * Register Airtime Link Metric. 607 */ 608 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 609 610} 611SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 612 613void 614ieee80211_mesh_attach(struct ieee80211com *ic) 615{ 616 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 617} 618 619void 620ieee80211_mesh_detach(struct ieee80211com *ic) 621{ 622} 623 624static void 625mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 626{ 627 struct ieee80211com *ic = ni->ni_ic; 628 uint16_t args[3]; 629 630 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 631 args[0] = ni->ni_mlpid; 632 args[1] = ni->ni_mllid; 633 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 634 ieee80211_send_action(ni, 635 IEEE80211_ACTION_CAT_SELF_PROT, 636 IEEE80211_ACTION_MESHPEERING_CLOSE, 637 args); 638 } 639 callout_drain(&ni->ni_mltimer); 640 /* XXX belongs in hwmp */ 641 ieee80211_ageq_drain_node(&ic->ic_stageq, 642 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 643} 644 645static void 646mesh_vdetach(struct ieee80211vap *vap) 647{ 648 struct ieee80211_mesh_state *ms = vap->iv_mesh; 649 650 callout_drain(&ms->ms_cleantimer); 651 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 652 NULL); 653 ieee80211_mesh_rt_flush(vap); 654 mtx_destroy(&ms->ms_rt_lock); 655 ms->ms_ppath->mpp_vdetach(vap); 656 free(vap->iv_mesh, M_80211_VAP); 657 vap->iv_mesh = NULL; 658} 659 660static void 661mesh_vattach(struct ieee80211vap *vap) 662{ 663 struct ieee80211_mesh_state *ms; 664 vap->iv_newstate = mesh_newstate; 665 vap->iv_input = mesh_input; 666 vap->iv_opdetach = mesh_vdetach; 667 vap->iv_recv_mgmt = mesh_recv_mgmt; 668 vap->iv_recv_ctl = mesh_recv_ctl; 669 ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 670 M_NOWAIT | M_ZERO); 671 if (ms == NULL) { 672 printf("%s: couldn't alloc MBSS state\n", __func__); 673 return; 674 } 675 vap->iv_mesh = ms; 676 ms->ms_seq = 0; 677 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 678 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 679 TAILQ_INIT(&ms->ms_known_gates); 680 TAILQ_INIT(&ms->ms_routes); 681 mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF); 682 callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE); 683 callout_init(&ms->ms_gatetimer, CALLOUT_MPSAFE); 684 ms->ms_gateseq = 0; 685 mesh_select_proto_metric(vap, "AIRTIME"); 686 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 687 mesh_select_proto_path(vap, "HWMP"); 688 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 689 ms->ms_ppath->mpp_vattach(vap); 690} 691 692/* 693 * IEEE80211_M_MBSS vap state machine handler. 694 */ 695static int 696mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 697{ 698 struct ieee80211_mesh_state *ms = vap->iv_mesh; 699 struct ieee80211com *ic = vap->iv_ic; 700 struct ieee80211_node *ni; 701 enum ieee80211_state ostate; 702 703 IEEE80211_LOCK_ASSERT(ic); 704 705 ostate = vap->iv_state; 706 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 707 __func__, ieee80211_state_name[ostate], 708 ieee80211_state_name[nstate], arg); 709 vap->iv_state = nstate; /* state transition */ 710 if (ostate != IEEE80211_S_SCAN) 711 ieee80211_cancel_scan(vap); /* background scan */ 712 ni = vap->iv_bss; /* NB: no reference held */ 713 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 714 callout_drain(&ms->ms_cleantimer); 715 callout_drain(&ms->ms_gatetimer); 716 } 717 switch (nstate) { 718 case IEEE80211_S_INIT: 719 switch (ostate) { 720 case IEEE80211_S_SCAN: 721 ieee80211_cancel_scan(vap); 722 break; 723 case IEEE80211_S_CAC: 724 ieee80211_dfs_cac_stop(vap); 725 break; 726 case IEEE80211_S_RUN: 727 ieee80211_iterate_nodes(&ic->ic_sta, 728 mesh_vdetach_peers, NULL); 729 break; 730 default: 731 break; 732 } 733 if (ostate != IEEE80211_S_INIT) { 734 /* NB: optimize INIT -> INIT case */ 735 ieee80211_reset_bss(vap); 736 ieee80211_mesh_rt_flush(vap); 737 } 738 break; 739 case IEEE80211_S_SCAN: 740 switch (ostate) { 741 case IEEE80211_S_INIT: 742 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 743 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 744 ms->ms_idlen != 0) { 745 /* 746 * Already have a channel and a mesh ID; bypass 747 * the scan and startup immediately. 748 */ 749 ieee80211_create_ibss(vap, vap->iv_des_chan); 750 break; 751 } 752 /* 753 * Initiate a scan. We can come here as a result 754 * of an IEEE80211_IOC_SCAN_REQ too in which case 755 * the vap will be marked with IEEE80211_FEXT_SCANREQ 756 * and the scan request parameters will be present 757 * in iv_scanreq. Otherwise we do the default. 758 */ 759 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 760 ieee80211_check_scan(vap, 761 vap->iv_scanreq_flags, 762 vap->iv_scanreq_duration, 763 vap->iv_scanreq_mindwell, 764 vap->iv_scanreq_maxdwell, 765 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 766 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 767 } else 768 ieee80211_check_scan_current(vap); 769 break; 770 default: 771 break; 772 } 773 break; 774 case IEEE80211_S_CAC: 775 /* 776 * Start CAC on a DFS channel. We come here when starting 777 * a bss on a DFS channel (see ieee80211_create_ibss). 778 */ 779 ieee80211_dfs_cac_start(vap); 780 break; 781 case IEEE80211_S_RUN: 782 switch (ostate) { 783 case IEEE80211_S_INIT: 784 /* 785 * Already have a channel; bypass the 786 * scan and startup immediately. 787 * Note that ieee80211_create_ibss will call 788 * back to do a RUN->RUN state change. 789 */ 790 ieee80211_create_ibss(vap, 791 ieee80211_ht_adjust_channel(ic, 792 ic->ic_curchan, vap->iv_flags_ht)); 793 /* NB: iv_bss is changed on return */ 794 break; 795 case IEEE80211_S_CAC: 796 /* 797 * NB: This is the normal state change when CAC 798 * expires and no radar was detected; no need to 799 * clear the CAC timer as it's already expired. 800 */ 801 /* fall thru... */ 802 case IEEE80211_S_CSA: 803#if 0 804 /* 805 * Shorten inactivity timer of associated stations 806 * to weed out sta's that don't follow a CSA. 807 */ 808 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 809#endif 810 /* 811 * Update bss node channel to reflect where 812 * we landed after CSA. 813 */ 814 ieee80211_node_set_chan(vap->iv_bss, 815 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 816 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 817 /* XXX bypass debug msgs */ 818 break; 819 case IEEE80211_S_SCAN: 820 case IEEE80211_S_RUN: 821#ifdef IEEE80211_DEBUG 822 if (ieee80211_msg_debug(vap)) { 823 struct ieee80211_node *ni = vap->iv_bss; 824 ieee80211_note(vap, 825 "synchronized with %s meshid ", 826 ether_sprintf(ni->ni_meshid)); 827 ieee80211_print_essid(ni->ni_meshid, 828 ni->ni_meshidlen); 829 /* XXX MCS/HT */ 830 printf(" channel %d\n", 831 ieee80211_chan2ieee(ic, ic->ic_curchan)); 832 } 833#endif 834 break; 835 default: 836 break; 837 } 838 ieee80211_node_authorize(vap->iv_bss); 839 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 840 mesh_rt_cleanup_cb, vap); 841 mesh_gatemode_setup(vap); 842 break; 843 default: 844 break; 845 } 846 /* NB: ostate not nstate */ 847 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 848 return 0; 849} 850 851static void 852mesh_rt_cleanup_cb(void *arg) 853{ 854 struct ieee80211vap *vap = arg; 855 struct ieee80211_mesh_state *ms = vap->iv_mesh; 856 857 mesh_rt_flush_invalid(vap); 858 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 859 mesh_rt_cleanup_cb, vap); 860} 861 862/* 863 * Mark a mesh STA as gate and return a pointer to it. 864 * If this is first time, we create a new gate route. 865 * Always update the path route to this mesh gate. 866 */ 867struct ieee80211_mesh_gate_route * 868ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 869 struct ieee80211_mesh_route *rt) 870{ 871 struct ieee80211_mesh_state *ms = vap->iv_mesh; 872 struct ieee80211_mesh_gate_route *gr = NULL, *next; 873 int found = 0; 874 875 MESH_RT_LOCK(ms); 876 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 877 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 878 found = 1; 879 break; 880 } 881 } 882 883 if (!found) { 884 /* New mesh gate add it to known table. */ 885 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 886 "%s", "stored new gate information from pro-PREQ."); 887 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 888 M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO); 889 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 890 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 891 } 892 gr->gr_route = rt; 893 /* TODO: link from path route to gate route */ 894 MESH_RT_UNLOCK(ms); 895 896 return gr; 897} 898 899 900/* 901 * Helper function to note the Mesh Peer Link FSM change. 902 */ 903static void 904mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 905{ 906 struct ieee80211vap *vap = ni->ni_vap; 907 struct ieee80211_mesh_state *ms = vap->iv_mesh; 908#ifdef IEEE80211_DEBUG 909 static const char *meshlinkstates[] = { 910 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 911 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 912 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 913 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 914 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 915 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 916 }; 917#endif 918 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 919 ni, "peer link: %s -> %s", 920 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 921 922 /* track neighbor count */ 923 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 924 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 925 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 926 ms->ms_neighbors++; 927 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 928 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 929 state != IEEE80211_NODE_MESH_ESTABLISHED) { 930 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 931 ms->ms_neighbors--; 932 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 933 } 934 ni->ni_mlstate = state; 935 switch (state) { 936 case IEEE80211_NODE_MESH_HOLDING: 937 ms->ms_ppath->mpp_peerdown(ni); 938 break; 939 case IEEE80211_NODE_MESH_ESTABLISHED: 940 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 941 break; 942 default: 943 break; 944 } 945} 946 947/* 948 * Helper function to generate a unique local ID required for mesh 949 * peer establishment. 950 */ 951static void 952mesh_checkid(void *arg, struct ieee80211_node *ni) 953{ 954 uint16_t *r = arg; 955 956 if (*r == ni->ni_mllid) 957 *(uint16_t *)arg = 0; 958} 959 960static uint32_t 961mesh_generateid(struct ieee80211vap *vap) 962{ 963 int maxiter = 4; 964 uint16_t r; 965 966 do { 967 get_random_bytes(&r, 2); 968 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 969 maxiter--; 970 } while (r == 0 && maxiter > 0); 971 return r; 972} 973 974/* 975 * Verifies if we already received this packet by checking its 976 * sequence number. 977 * Returns 0 if the frame is to be accepted, 1 otherwise. 978 */ 979static int 980mesh_checkpseq(struct ieee80211vap *vap, 981 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 982{ 983 struct ieee80211_mesh_route *rt; 984 985 rt = ieee80211_mesh_rt_find(vap, source); 986 if (rt == NULL) { 987 rt = ieee80211_mesh_rt_add(vap, source); 988 if (rt == NULL) { 989 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 990 "%s", "add mcast route failed"); 991 vap->iv_stats.is_mesh_rtaddfailed++; 992 return 1; 993 } 994 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 995 "add mcast route, mesh seqno %d", seq); 996 rt->rt_lastmseq = seq; 997 return 0; 998 } 999 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 1000 return 1; 1001 } else { 1002 rt->rt_lastmseq = seq; 1003 return 0; 1004 } 1005} 1006 1007/* 1008 * Iterate the routing table and locate the next hop. 1009 */ 1010struct ieee80211_node * 1011ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1012 const uint8_t dest[IEEE80211_ADDR_LEN]) 1013{ 1014 struct ieee80211_mesh_route *rt; 1015 1016 rt = ieee80211_mesh_rt_find(vap, dest); 1017 if (rt == NULL) 1018 return NULL; 1019 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1020 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1021 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1022 /* XXX stat */ 1023 return NULL; 1024 } 1025 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1026 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1027 if (rt == NULL) return NULL; 1028 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1029 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1030 "%s: meshgate !valid, flags 0x%x", __func__, 1031 rt->rt_flags); 1032 /* XXX stat */ 1033 return NULL; 1034 } 1035 } 1036 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1037} 1038 1039static void 1040mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1041 struct ieee80211_mesh_route *rt_gate) 1042{ 1043 struct ifnet *ifp = vap->iv_ifp; 1044 struct ieee80211_node *ni; 1045 1046 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1047 1048 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1049 if (ni == NULL) { 1050 ifp->if_oerrors++; 1051 m_freem(m); 1052 return; 1053 } 1054 1055 /* 1056 * Send through the VAP packet transmit path. 1057 * This consumes the node ref grabbed above and 1058 * the mbuf, regardless of whether there's a problem 1059 * or not. 1060 */ 1061 (void) ieee80211_vap_pkt_send_dest(vap, m, ni); 1062} 1063 1064/* 1065 * Forward the queued frames to known valid mesh gates. 1066 * Assume destination to be outside the MBSS (i.e. proxy entry), 1067 * If no valid mesh gates are known silently discard queued frames. 1068 * After transmitting frames to all known valid mesh gates, this route 1069 * will be marked invalid, and a new path discovery will happen in the hopes 1070 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1071 */ 1072void 1073ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1074 struct ieee80211_mesh_route *rt_dest) 1075{ 1076 struct ieee80211com *ic = vap->iv_ic; 1077 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1078 struct ieee80211_mesh_route *rt_gate; 1079 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1080 struct mbuf *m, *mcopy, *next; 1081 1082 IEEE80211_TX_UNLOCK_ASSERT(ic); 1083 1084 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1085 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1086 1087 /* XXX: send to more than one valid mash gate */ 1088 MESH_RT_LOCK(ms); 1089 1090 m = ieee80211_ageq_remove(&ic->ic_stageq, 1091 (struct ieee80211_node *)(uintptr_t) 1092 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1093 1094 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1095 rt_gate = gr->gr_route; 1096 if (rt_gate == NULL) { 1097 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1098 rt_dest->rt_dest, 1099 "mesh gate with no path %6D", 1100 gr->gr_addr, ":"); 1101 continue; 1102 } 1103 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1104 continue; 1105 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1106 ("route not marked as a mesh gate")); 1107 KASSERT((rt_gate->rt_flags & 1108 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1109 ("found mesh gate that is also marked porxy")); 1110 /* 1111 * convert route to a proxy route gated by the current 1112 * mesh gate, this is needed so encap can built data 1113 * frame with correct address. 1114 */ 1115 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1116 IEEE80211_MESHRT_FLAGS_VALID; 1117 rt_dest->rt_ext_seq = 1; /* random value */ 1118 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1119 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1120 rt_dest->rt_metric = rt_gate->rt_metric; 1121 rt_dest->rt_nhops = rt_gate->rt_nhops; 1122 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1123 MESH_RT_UNLOCK(ms); 1124 /* XXX: lock?? */ 1125 mcopy = m_dup(m, M_NOWAIT); 1126 for (; mcopy != NULL; mcopy = next) { 1127 next = mcopy->m_nextpkt; 1128 mcopy->m_nextpkt = NULL; 1129 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1130 rt_dest->rt_dest, 1131 "flush queued frame %p len %d", mcopy, 1132 mcopy->m_pkthdr.len); 1133 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1134 } 1135 MESH_RT_LOCK(ms); 1136 } 1137 rt_dest->rt_flags = 0; /* Mark invalid */ 1138 m_freem(m); 1139 MESH_RT_UNLOCK(ms); 1140} 1141 1142/* 1143 * Forward the specified frame. 1144 * Decrement the TTL and set TA to our MAC address. 1145 */ 1146static void 1147mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1148 const struct ieee80211_meshcntl *mc) 1149{ 1150 struct ieee80211com *ic = vap->iv_ic; 1151 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1152 struct ifnet *ifp = vap->iv_ifp; 1153 const struct ieee80211_frame *wh = 1154 mtod(m, const struct ieee80211_frame *); 1155 struct mbuf *mcopy; 1156 struct ieee80211_meshcntl *mccopy; 1157 struct ieee80211_frame *whcopy; 1158 struct ieee80211_node *ni; 1159 int err; 1160 1161 /* This is called from the RX path - don't hold this lock */ 1162 IEEE80211_TX_UNLOCK_ASSERT(ic); 1163 1164 /* 1165 * mesh ttl of 1 means we are the last one receving it, 1166 * according to amendment we decrement and then check if 1167 * 0, if so we dont forward. 1168 */ 1169 if (mc->mc_ttl < 1) { 1170 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1171 "%s", "frame not fwd'd, ttl 1"); 1172 vap->iv_stats.is_mesh_fwd_ttl++; 1173 return; 1174 } 1175 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1176 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1177 "%s", "frame not fwd'd, fwding disabled"); 1178 vap->iv_stats.is_mesh_fwd_disabled++; 1179 return; 1180 } 1181 mcopy = m_dup(m, M_NOWAIT); 1182 if (mcopy == NULL) { 1183 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1184 "%s", "frame not fwd'd, cannot dup"); 1185 vap->iv_stats.is_mesh_fwd_nobuf++; 1186 ifp->if_oerrors++; 1187 return; 1188 } 1189 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1190 sizeof(struct ieee80211_meshcntl)); 1191 if (mcopy == NULL) { 1192 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1193 "%s", "frame not fwd'd, too short"); 1194 vap->iv_stats.is_mesh_fwd_tooshort++; 1195 ifp->if_oerrors++; 1196 m_freem(mcopy); 1197 return; 1198 } 1199 whcopy = mtod(mcopy, struct ieee80211_frame *); 1200 mccopy = (struct ieee80211_meshcntl *) 1201 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1202 /* XXX clear other bits? */ 1203 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1204 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1205 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1206 ni = ieee80211_ref_node(vap->iv_bss); 1207 mcopy->m_flags |= M_MCAST; 1208 } else { 1209 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1210 if (ni == NULL) { 1211 /* 1212 * [Optional] any of the following three actions: 1213 * o silently discard 1214 * o trigger a path discovery 1215 * o inform TA that meshDA is unknown. 1216 */ 1217 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1218 "%s", "frame not fwd'd, no path"); 1219 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1220 IEEE80211_REASON_MESH_PERR_NO_FI); 1221 vap->iv_stats.is_mesh_fwd_nopath++; 1222 m_freem(mcopy); 1223 return; 1224 } 1225 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1226 } 1227 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1228 mccopy->mc_ttl--; 1229 1230 /* XXX calculate priority so drivers can find the tx queue */ 1231 M_WME_SETAC(mcopy, WME_AC_BE); 1232 1233 /* XXX do we know m_nextpkt is NULL? */ 1234 mcopy->m_pkthdr.rcvif = (void *) ni; 1235 1236 /* 1237 * XXX this bypasses all of the VAP TX handling; it passes frames 1238 * directly to the parent interface. 1239 * 1240 * Because of this, there's no TX lock being held as there's no 1241 * encaps state being used. 1242 * 1243 * Doing a direct parent transmit may not be the correct thing 1244 * to do here; we'll have to re-think this soon. 1245 */ 1246 IEEE80211_TX_LOCK(ic); 1247 err = ieee80211_parent_xmitpkt(ic, mcopy); 1248 IEEE80211_TX_UNLOCK(ic); 1249 if (err != 0) { 1250 /* NB: IFQ_HANDOFF reclaims mbuf */ 1251 ieee80211_free_node(ni); 1252 } else { 1253 ifp->if_opackets++; 1254 } 1255} 1256 1257static struct mbuf * 1258mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1259{ 1260#define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1261#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1262 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1263 sizeof(struct ieee80211_meshcntl_ae10)]; 1264 const struct ieee80211_qosframe_addr4 *wh; 1265 const struct ieee80211_meshcntl_ae10 *mc; 1266 struct ether_header *eh; 1267 struct llc *llc; 1268 int ae; 1269 1270 if (m->m_len < hdrlen + sizeof(*llc) && 1271 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1272 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1273 "discard data frame: %s", "m_pullup failed"); 1274 vap->iv_stats.is_rx_tooshort++; 1275 return NULL; 1276 } 1277 memcpy(b, mtod(m, caddr_t), hdrlen); 1278 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1279 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1280 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1281 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1282 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1283 1284 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1285 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1286 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1287 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1288 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1289 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1290 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1291 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1292 llc = NULL; 1293 } else { 1294 m_adj(m, hdrlen - sizeof(*eh)); 1295 } 1296 eh = mtod(m, struct ether_header *); 1297 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1298 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1299 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1300 if (ae == IEEE80211_MESH_AE_00) { 1301 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1302 } else if (ae == IEEE80211_MESH_AE_01) { 1303 IEEE80211_ADDR_COPY(eh->ether_shost, 1304 MC01(mc)->mc_addr4); 1305 } else { 1306 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1307 (const struct ieee80211_frame *)wh, NULL, 1308 "bad AE %d", ae); 1309 vap->iv_stats.is_mesh_badae++; 1310 m_freem(m); 1311 return NULL; 1312 } 1313 } else { 1314 if (ae == IEEE80211_MESH_AE_00) { 1315 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1316 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1317 } else if (ae == IEEE80211_MESH_AE_10) { 1318 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1319 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1320 } else { 1321 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1322 (const struct ieee80211_frame *)wh, NULL, 1323 "bad AE %d", ae); 1324 vap->iv_stats.is_mesh_badae++; 1325 m_freem(m); 1326 return NULL; 1327 } 1328 } 1329#ifndef __NO_STRICT_ALIGNMENT 1330 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1331 m = ieee80211_realign(vap, m, sizeof(*eh)); 1332 if (m == NULL) 1333 return NULL; 1334 } 1335#endif /* !__NO_STRICT_ALIGNMENT */ 1336 if (llc != NULL) { 1337 eh = mtod(m, struct ether_header *); 1338 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1339 } 1340 return m; 1341#undef WDIR 1342#undef MC01 1343} 1344 1345/* 1346 * Return non-zero if the unicast mesh data frame should be processed 1347 * locally. Frames that are not proxy'd have our address, otherwise 1348 * we need to consult the routing table to look for a proxy entry. 1349 */ 1350static __inline int 1351mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1352 const struct ieee80211_meshcntl *mc) 1353{ 1354 int ae = mc->mc_flags & 3; 1355 1356 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1357 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1358 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1359 ("bad AE %d", ae)); 1360 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1361 const struct ieee80211_meshcntl_ae10 *mc10 = 1362 (const struct ieee80211_meshcntl_ae10 *) mc; 1363 struct ieee80211_mesh_route *rt = 1364 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1365 /* check for proxy route to ourself */ 1366 return (rt != NULL && 1367 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1368 } else /* ucast w/o proxy */ 1369 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1370} 1371 1372/* 1373 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1374 * > 0 means we have forwarded data and no need to process locally 1375 * == 0 means we want to process locally (and we may have forwarded data 1376 * < 0 means there was an error and data should be discarded 1377 */ 1378static int 1379mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1380 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1381{ 1382 struct ieee80211_qosframe_addr4 *qwh; 1383 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1384 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1385 1386 /* This is called from the RX path - don't hold this lock */ 1387 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1388 1389 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1390 1391 /* 1392 * TODO: 1393 * o verify addr2 is a legitimate transmitter 1394 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1395 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1396 */ 1397 1398 /* set lifetime of addr3 (meshDA) to initial value */ 1399 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1400 if (rt_meshda == NULL) { 1401 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1402 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1403 /* 1404 * [Optional] any of the following three actions: 1405 * o silently discard [X] 1406 * o trigger a path discovery [ ] 1407 * o inform TA that meshDA is unknown. [ ] 1408 */ 1409 /* XXX: stats */ 1410 return (-1); 1411 } 1412 1413 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1414 ms->ms_ppath->mpp_inact)); 1415 1416 /* set lifetime of addr4 (meshSA) to initial value */ 1417 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1418 KASSERT(rt_meshsa != NULL, ("no route")); 1419 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1420 ms->ms_ppath->mpp_inact)); 1421 1422 mesh_forward(vap, m, mc); 1423 return (1); /* dont process locally */ 1424} 1425 1426/* 1427 * Verifies transmitter, updates lifetime, precursor list and process data 1428 * locally, if data is proxy with AE = 10 it could mean data should go 1429 * on another mesh path or data should be forwarded to the DS. 1430 * 1431 * > 0 means we have forwarded data and no need to process locally 1432 * == 0 means we want to process locally (and we may have forwarded data 1433 * < 0 means there was an error and data should be discarded 1434 */ 1435static int 1436mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1437 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1438{ 1439 struct ieee80211_qosframe_addr4 *qwh; 1440 const struct ieee80211_meshcntl_ae10 *mc10; 1441 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1442 struct ieee80211_mesh_route *rt; 1443 int ae; 1444 1445 /* This is called from the RX path - don't hold this lock */ 1446 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1447 1448 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1449 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1450 1451 /* 1452 * TODO: 1453 * o verify addr2 is a legitimate transmitter 1454 * o lifetime of precursor entry is max(init, curr) 1455 */ 1456 1457 /* set lifetime of addr4 (meshSA) to initial value */ 1458 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1459 KASSERT(rt != NULL, ("no route")); 1460 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1461 rt = NULL; 1462 1463 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1464 KASSERT(ae == IEEE80211_MESH_AE_00 || 1465 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1466 if (ae == IEEE80211_MESH_AE_10) { 1467 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1468 return (0); /* process locally */ 1469 } 1470 1471 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1472 if (rt != NULL && 1473 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1474 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1475 /* 1476 * Forward on another mesh-path, according to 1477 * amendment as specified in 9.32.4.1 1478 */ 1479 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1480 mesh_forward(vap, m, 1481 (const struct ieee80211_meshcntl *)mc10); 1482 return (1); /* dont process locally */ 1483 } 1484 /* 1485 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1486 * addressed according to 13.11.3.2. 1487 */ 1488 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1489 "forward frame to DS, SA(%6D) DA(%6D)", 1490 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1491 } 1492 return (0); /* process locally */ 1493} 1494 1495/* 1496 * Try to forward the group addressed data on to other mesh STAs, and 1497 * also to the DS. 1498 * 1499 * > 0 means we have forwarded data and no need to process locally 1500 * == 0 means we want to process locally (and we may have forwarded data 1501 * < 0 means there was an error and data should be discarded 1502 */ 1503static int 1504mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1505 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1506{ 1507#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1508 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1509 1510 /* This is called from the RX path - don't hold this lock */ 1511 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1512 1513 mesh_forward(vap, m, mc); 1514 1515 if(mc->mc_ttl > 0) { 1516 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1517 /* 1518 * Forward of MSDUs from the MBSS to DS group addressed 1519 * (according to 13.11.3.2) 1520 * This happens by delivering the packet, and a bridge 1521 * will sent it on another port member. 1522 */ 1523 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1524 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1525 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1526 MC01(mc)->mc_addr4, "%s", 1527 "forward from MBSS to the DS"); 1528 } 1529 } 1530 return (0); /* process locally */ 1531#undef MC01 1532} 1533 1534static int 1535mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 1536{ 1537#define HAS_SEQ(type) ((type & 0x4) == 0) 1538#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1539#define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1540 struct ieee80211vap *vap = ni->ni_vap; 1541 struct ieee80211com *ic = ni->ni_ic; 1542 struct ifnet *ifp = vap->iv_ifp; 1543 struct ieee80211_frame *wh; 1544 const struct ieee80211_meshcntl *mc; 1545 int hdrspace, meshdrlen, need_tap, error; 1546 uint8_t dir, type, subtype, ae; 1547 uint32_t seq; 1548 const uint8_t *addr; 1549 uint8_t qos[2]; 1550 ieee80211_seq rxseq; 1551 1552 KASSERT(ni != NULL, ("null node")); 1553 ni->ni_inact = ni->ni_inact_reload; 1554 1555 need_tap = 1; /* mbuf need to be tapped. */ 1556 type = -1; /* undefined */ 1557 1558 /* This is called from the RX path - don't hold this lock */ 1559 IEEE80211_TX_UNLOCK_ASSERT(ic); 1560 1561 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1562 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1563 ni->ni_macaddr, NULL, 1564 "too short (1): len %u", m->m_pkthdr.len); 1565 vap->iv_stats.is_rx_tooshort++; 1566 goto out; 1567 } 1568 /* 1569 * Bit of a cheat here, we use a pointer for a 3-address 1570 * frame format but don't reference fields past outside 1571 * ieee80211_frame_min w/o first validating the data is 1572 * present. 1573 */ 1574 wh = mtod(m, struct ieee80211_frame *); 1575 1576 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1577 IEEE80211_FC0_VERSION_0) { 1578 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1579 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1580 vap->iv_stats.is_rx_badversion++; 1581 goto err; 1582 } 1583 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1584 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1585 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1586 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1587 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1588 ni->ni_noise = nf; 1589 if (HAS_SEQ(type)) { 1590 uint8_t tid = ieee80211_gettid(wh); 1591 1592 if (IEEE80211_QOS_HAS_SEQ(wh) && 1593 TID_TO_WME_AC(tid) >= WME_AC_VI) 1594 ic->ic_wme.wme_hipri_traffic++; 1595 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1596 if (! ieee80211_check_rxseq(ni, wh)) { 1597 /* duplicate, discard */ 1598 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1599 wh->i_addr1, "duplicate", 1600 "seqno <%u,%u> fragno <%u,%u> tid %u", 1601 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1602 ni->ni_rxseqs[tid] >> 1603 IEEE80211_SEQ_SEQ_SHIFT, 1604 rxseq & IEEE80211_SEQ_FRAG_MASK, 1605 ni->ni_rxseqs[tid] & 1606 IEEE80211_SEQ_FRAG_MASK, 1607 tid); 1608 vap->iv_stats.is_rx_dup++; 1609 IEEE80211_NODE_STAT(ni, rx_dup); 1610 goto out; 1611 } 1612 ni->ni_rxseqs[tid] = rxseq; 1613 } 1614 } 1615#ifdef IEEE80211_DEBUG 1616 /* 1617 * It's easier, but too expensive, to simulate different mesh 1618 * topologies by consulting the ACL policy very early, so do this 1619 * only under DEBUG. 1620 * 1621 * NB: this check is also done upon peering link initiation. 1622 */ 1623 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1624 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1625 wh, NULL, "%s", "disallowed by ACL"); 1626 vap->iv_stats.is_rx_acl++; 1627 goto out; 1628 } 1629#endif 1630 switch (type) { 1631 case IEEE80211_FC0_TYPE_DATA: 1632 if (ni == vap->iv_bss) 1633 goto out; 1634 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1635 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1636 ni->ni_macaddr, NULL, 1637 "peer link not yet established (%d)", 1638 ni->ni_mlstate); 1639 vap->iv_stats.is_mesh_nolink++; 1640 goto out; 1641 } 1642 if (dir != IEEE80211_FC1_DIR_FROMDS && 1643 dir != IEEE80211_FC1_DIR_DSTODS) { 1644 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1645 wh, "data", "incorrect dir 0x%x", dir); 1646 vap->iv_stats.is_rx_wrongdir++; 1647 goto err; 1648 } 1649 1650 /* All Mesh data frames are QoS subtype */ 1651 if (!HAS_SEQ(type)) { 1652 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1653 wh, "data", "incorrect subtype 0x%x", subtype); 1654 vap->iv_stats.is_rx_badsubtype++; 1655 goto err; 1656 } 1657 1658 /* 1659 * Next up, any fragmentation. 1660 * XXX: we defrag before we even try to forward, 1661 * Mesh Control field is not present in sub-sequent 1662 * fragmented frames. This is in contrast to Draft 4.0. 1663 */ 1664 hdrspace = ieee80211_hdrspace(ic, wh); 1665 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1666 m = ieee80211_defrag(ni, m, hdrspace); 1667 if (m == NULL) { 1668 /* Fragment dropped or frame not complete yet */ 1669 goto out; 1670 } 1671 } 1672 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1673 1674 /* 1675 * Now we have a complete Mesh Data frame. 1676 */ 1677 1678 /* 1679 * Only fromDStoDS data frames use 4 address qos frames 1680 * as specified in amendment. Otherwise addr4 is located 1681 * in the Mesh Control field and a 3 address qos frame 1682 * is used. 1683 */ 1684 if (IEEE80211_IS_DSTODS(wh)) 1685 *(uint16_t *)qos = *(uint16_t *) 1686 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1687 else 1688 *(uint16_t *)qos = *(uint16_t *) 1689 ((struct ieee80211_qosframe *)wh)->i_qos; 1690 1691 /* 1692 * NB: The mesh STA sets the Mesh Control Present 1693 * subfield to 1 in the Mesh Data frame containing 1694 * an unfragmented MSDU, an A-MSDU, or the first 1695 * fragment of an MSDU. 1696 * After defrag it should always be present. 1697 */ 1698 if (!(qos[1] & IEEE80211_QOS_MC)) { 1699 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1700 ni->ni_macaddr, NULL, 1701 "%s", "Mesh control field not present"); 1702 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1703 goto err; 1704 } 1705 1706 /* pull up enough to get to the mesh control */ 1707 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1708 (m = m_pullup(m, hdrspace + 1709 sizeof(struct ieee80211_meshcntl))) == NULL) { 1710 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1711 ni->ni_macaddr, NULL, 1712 "data too short: expecting %u", hdrspace); 1713 vap->iv_stats.is_rx_tooshort++; 1714 goto out; /* XXX */ 1715 } 1716 /* 1717 * Now calculate the full extent of the headers. Note 1718 * mesh_decap will pull up anything we didn't get 1719 * above when it strips the 802.11 headers. 1720 */ 1721 mc = (const struct ieee80211_meshcntl *) 1722 (mtod(m, const uint8_t *) + hdrspace); 1723 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1724 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1725 ae * IEEE80211_ADDR_LEN; 1726 hdrspace += meshdrlen; 1727 1728 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1729 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1730 (m->m_len < hdrspace) && 1731 ((m = m_pullup(m, hdrspace)) == NULL)) { 1732 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1733 ni->ni_macaddr, NULL, 1734 "data too short: expecting %u", hdrspace); 1735 vap->iv_stats.is_rx_tooshort++; 1736 goto out; /* XXX */ 1737 } 1738 /* XXX: are we sure there is no reallocating after m_pullup? */ 1739 1740 seq = LE_READ_4(mc->mc_seq); 1741 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1742 addr = wh->i_addr3; 1743 else if (ae == IEEE80211_MESH_AE_01) 1744 addr = MC01(mc)->mc_addr4; 1745 else 1746 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1747 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1748 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1749 addr, "data", "%s", "not to me"); 1750 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1751 goto out; 1752 } 1753 if (mesh_checkpseq(vap, addr, seq) != 0) { 1754 vap->iv_stats.is_rx_dup++; 1755 goto out; 1756 } 1757 1758 /* This code "routes" the frame to the right control path */ 1759 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1760 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1761 error = 1762 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1763 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1764 error = mesh_recv_group_data(vap, m, wh, mc); 1765 else 1766 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1767 wh, mc); 1768 } else 1769 error = mesh_recv_group_data(vap, m, wh, mc); 1770 if (error < 0) 1771 goto err; 1772 else if (error > 0) 1773 goto out; 1774 1775 if (ieee80211_radiotap_active_vap(vap)) 1776 ieee80211_radiotap_rx(vap, m); 1777 need_tap = 0; 1778 1779 /* 1780 * Finally, strip the 802.11 header. 1781 */ 1782 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1783 if (m == NULL) { 1784 /* XXX mask bit to check for both */ 1785 /* don't count Null data frames as errors */ 1786 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1787 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1788 goto out; 1789 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1790 ni->ni_macaddr, "data", "%s", "decap error"); 1791 vap->iv_stats.is_rx_decap++; 1792 IEEE80211_NODE_STAT(ni, rx_decap); 1793 goto err; 1794 } 1795 if (qos[0] & IEEE80211_QOS_AMSDU) { 1796 m = ieee80211_decap_amsdu(ni, m); 1797 if (m == NULL) 1798 return IEEE80211_FC0_TYPE_DATA; 1799 } 1800 ieee80211_deliver_data(vap, ni, m); 1801 return type; 1802 case IEEE80211_FC0_TYPE_MGT: 1803 vap->iv_stats.is_rx_mgmt++; 1804 IEEE80211_NODE_STAT(ni, rx_mgmt); 1805 if (dir != IEEE80211_FC1_DIR_NODS) { 1806 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1807 wh, "mgt", "incorrect dir 0x%x", dir); 1808 vap->iv_stats.is_rx_wrongdir++; 1809 goto err; 1810 } 1811 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1812 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1813 ni->ni_macaddr, "mgt", "too short: len %u", 1814 m->m_pkthdr.len); 1815 vap->iv_stats.is_rx_tooshort++; 1816 goto out; 1817 } 1818#ifdef IEEE80211_DEBUG 1819 if ((ieee80211_msg_debug(vap) && 1820 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1821 ieee80211_msg_dumppkts(vap)) { 1822 if_printf(ifp, "received %s from %s rssi %d\n", 1823 ieee80211_mgt_subtype_name[subtype >> 1824 IEEE80211_FC0_SUBTYPE_SHIFT], 1825 ether_sprintf(wh->i_addr2), rssi); 1826 } 1827#endif 1828 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1829 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1830 wh, NULL, "%s", "WEP set but not permitted"); 1831 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1832 goto out; 1833 } 1834 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1835 goto out; 1836 case IEEE80211_FC0_TYPE_CTL: 1837 vap->iv_stats.is_rx_ctl++; 1838 IEEE80211_NODE_STAT(ni, rx_ctrl); 1839 goto out; 1840 default: 1841 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1842 wh, "bad", "frame type 0x%x", type); 1843 /* should not come here */ 1844 break; 1845 } 1846err: 1847 ifp->if_ierrors++; 1848out: 1849 if (m != NULL) { 1850 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1851 ieee80211_radiotap_rx(vap, m); 1852 m_freem(m); 1853 } 1854 return type; 1855#undef HAS_SEQ 1856#undef MC01 1857#undef MC10 1858} 1859 1860static void 1861mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1862 int rssi, int nf) 1863{ 1864 struct ieee80211vap *vap = ni->ni_vap; 1865 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1866 struct ieee80211com *ic = ni->ni_ic; 1867 struct ieee80211_frame *wh; 1868 struct ieee80211_mesh_route *rt; 1869 uint8_t *frm, *efrm; 1870 1871 wh = mtod(m0, struct ieee80211_frame *); 1872 frm = (uint8_t *)&wh[1]; 1873 efrm = mtod(m0, uint8_t *) + m0->m_len; 1874 switch (subtype) { 1875 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1876 case IEEE80211_FC0_SUBTYPE_BEACON: 1877 { 1878 struct ieee80211_scanparams scan; 1879 /* 1880 * We process beacon/probe response 1881 * frames to discover neighbors. 1882 */ 1883 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1884 return; 1885 /* 1886 * Count frame now that we know it's to be processed. 1887 */ 1888 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1889 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1890 IEEE80211_NODE_STAT(ni, rx_beacons); 1891 } else 1892 IEEE80211_NODE_STAT(ni, rx_proberesp); 1893 /* 1894 * If scanning, just pass information to the scan module. 1895 */ 1896 if (ic->ic_flags & IEEE80211_F_SCAN) { 1897 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1898 /* 1899 * Actively scanning a channel marked passive; 1900 * send a probe request now that we know there 1901 * is 802.11 traffic present. 1902 * 1903 * XXX check if the beacon we recv'd gives 1904 * us what we need and suppress the probe req 1905 */ 1906 ieee80211_probe_curchan(vap, 1); 1907 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1908 } 1909 ieee80211_add_scan(vap, &scan, wh, 1910 subtype, rssi, nf); 1911 return; 1912 } 1913 1914 /* The rest of this code assumes we are running */ 1915 if (vap->iv_state != IEEE80211_S_RUN) 1916 return; 1917 /* 1918 * Ignore non-mesh STAs. 1919 */ 1920 if ((scan.capinfo & 1921 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1922 scan.meshid == NULL || scan.meshconf == NULL) { 1923 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1924 wh, "beacon", "%s", "not a mesh sta"); 1925 vap->iv_stats.is_mesh_wrongmesh++; 1926 return; 1927 } 1928 /* 1929 * Ignore STAs for other mesh networks. 1930 */ 1931 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1932 mesh_verify_meshconf(vap, scan.meshconf)) { 1933 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1934 wh, "beacon", "%s", "not for our mesh"); 1935 vap->iv_stats.is_mesh_wrongmesh++; 1936 return; 1937 } 1938 /* 1939 * Peer only based on the current ACL policy. 1940 */ 1941 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1942 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1943 wh, NULL, "%s", "disallowed by ACL"); 1944 vap->iv_stats.is_rx_acl++; 1945 return; 1946 } 1947 /* 1948 * Do neighbor discovery. 1949 */ 1950 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1951 /* 1952 * Create a new entry in the neighbor table. 1953 */ 1954 ni = ieee80211_add_neighbor(vap, wh, &scan); 1955 } 1956 /* 1957 * Automatically peer with discovered nodes if possible. 1958 */ 1959 if (ni != vap->iv_bss && 1960 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1961 switch (ni->ni_mlstate) { 1962 case IEEE80211_NODE_MESH_IDLE: 1963 { 1964 uint16_t args[1]; 1965 1966 /* Wait for backoff callout to reset counter */ 1967 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1968 return; 1969 1970 ni->ni_mlpid = mesh_generateid(vap); 1971 if (ni->ni_mlpid == 0) 1972 return; 1973 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1974 args[0] = ni->ni_mlpid; 1975 ieee80211_send_action(ni, 1976 IEEE80211_ACTION_CAT_SELF_PROT, 1977 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1978 ni->ni_mlrcnt = 0; 1979 mesh_peer_timeout_setup(ni); 1980 break; 1981 } 1982 case IEEE80211_NODE_MESH_ESTABLISHED: 1983 { 1984 /* 1985 * Valid beacon from a peer mesh STA 1986 * bump TA lifetime 1987 */ 1988 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1989 if(rt != NULL) { 1990 ieee80211_mesh_rt_update(rt, 1991 ticks_to_msecs( 1992 ms->ms_ppath->mpp_inact)); 1993 } 1994 break; 1995 } 1996 default: 1997 break; /* ignore */ 1998 } 1999 } 2000 break; 2001 } 2002 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2003 { 2004 uint8_t *ssid, *meshid, *rates, *xrates; 2005 uint8_t *sfrm; 2006 2007 if (vap->iv_state != IEEE80211_S_RUN) { 2008 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2009 wh, NULL, "wrong state %s", 2010 ieee80211_state_name[vap->iv_state]); 2011 vap->iv_stats.is_rx_mgtdiscard++; 2012 return; 2013 } 2014 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 2015 /* frame must be directed */ 2016 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2017 wh, NULL, "%s", "not unicast"); 2018 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 2019 return; 2020 } 2021 /* 2022 * prreq frame format 2023 * [tlv] ssid 2024 * [tlv] supported rates 2025 * [tlv] extended supported rates 2026 * [tlv] mesh id 2027 */ 2028 ssid = meshid = rates = xrates = NULL; 2029 sfrm = frm; 2030 while (efrm - frm > 1) { 2031 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2032 switch (*frm) { 2033 case IEEE80211_ELEMID_SSID: 2034 ssid = frm; 2035 break; 2036 case IEEE80211_ELEMID_RATES: 2037 rates = frm; 2038 break; 2039 case IEEE80211_ELEMID_XRATES: 2040 xrates = frm; 2041 break; 2042 case IEEE80211_ELEMID_MESHID: 2043 meshid = frm; 2044 break; 2045 } 2046 frm += frm[1] + 2; 2047 } 2048 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2049 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2050 if (xrates != NULL) 2051 IEEE80211_VERIFY_ELEMENT(xrates, 2052 IEEE80211_RATE_MAXSIZE - rates[1], return); 2053 if (meshid != NULL) { 2054 IEEE80211_VERIFY_ELEMENT(meshid, 2055 IEEE80211_MESHID_LEN, return); 2056 /* NB: meshid, not ssid */ 2057 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2058 } 2059 2060 /* XXX find a better class or define it's own */ 2061 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2062 "%s", "recv probe req"); 2063 /* 2064 * Some legacy 11b clients cannot hack a complete 2065 * probe response frame. When the request includes 2066 * only a bare-bones rate set, communicate this to 2067 * the transmit side. 2068 */ 2069 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2070 break; 2071 } 2072 2073 case IEEE80211_FC0_SUBTYPE_ACTION: 2074 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2075 if (ni == vap->iv_bss) { 2076 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2077 wh, NULL, "%s", "unknown node"); 2078 vap->iv_stats.is_rx_mgtdiscard++; 2079 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2080 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2081 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2082 wh, NULL, "%s", "not for us"); 2083 vap->iv_stats.is_rx_mgtdiscard++; 2084 } else if (vap->iv_state != IEEE80211_S_RUN) { 2085 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2086 wh, NULL, "wrong state %s", 2087 ieee80211_state_name[vap->iv_state]); 2088 vap->iv_stats.is_rx_mgtdiscard++; 2089 } else { 2090 if (ieee80211_parse_action(ni, m0) == 0) 2091 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2092 } 2093 break; 2094 2095 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2096 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2097 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2098 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2099 case IEEE80211_FC0_SUBTYPE_ATIM: 2100 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2101 case IEEE80211_FC0_SUBTYPE_AUTH: 2102 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2103 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2104 wh, NULL, "%s", "not handled"); 2105 vap->iv_stats.is_rx_mgtdiscard++; 2106 break; 2107 2108 default: 2109 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2110 wh, "mgt", "subtype 0x%x not handled", subtype); 2111 vap->iv_stats.is_rx_badsubtype++; 2112 break; 2113 } 2114} 2115 2116static void 2117mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2118{ 2119 2120 switch (subtype) { 2121 case IEEE80211_FC0_SUBTYPE_BAR: 2122 ieee80211_recv_bar(ni, m); 2123 break; 2124 } 2125} 2126 2127/* 2128 * Parse meshpeering action ie's for MPM frames 2129 */ 2130static const struct ieee80211_meshpeer_ie * 2131mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2132 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2133 const uint8_t *frm, const uint8_t *efrm, 2134 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2135{ 2136 struct ieee80211vap *vap = ni->ni_vap; 2137 const struct ieee80211_meshpeer_ie *mpie; 2138 uint16_t args[3]; 2139 const uint8_t *meshid, *meshconf, *meshpeer; 2140 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2141 2142 meshid = meshconf = meshpeer = NULL; 2143 while (efrm - frm > 1) { 2144 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2145 switch (*frm) { 2146 case IEEE80211_ELEMID_MESHID: 2147 meshid = frm; 2148 break; 2149 case IEEE80211_ELEMID_MESHCONF: 2150 meshconf = frm; 2151 break; 2152 case IEEE80211_ELEMID_MESHPEER: 2153 meshpeer = frm; 2154 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2155 memset(mp, 0, sizeof(*mp)); 2156 mp->peer_len = mpie->peer_len; 2157 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 2158 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 2159 switch (subtype) { 2160 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2161 mp->peer_linkid = 2162 LE_READ_2(&mpie->peer_linkid); 2163 break; 2164 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2165 /* NB: peer link ID is optional */ 2166 if (mpie->peer_len == 2167 (IEEE80211_MPM_BASE_SZ + 2)) { 2168 mp->peer_linkid = 0; 2169 mp->peer_rcode = 2170 LE_READ_2(&mpie->peer_linkid); 2171 } else { 2172 mp->peer_linkid = 2173 LE_READ_2(&mpie->peer_linkid); 2174 mp->peer_rcode = 2175 LE_READ_2(&mpie->peer_rcode); 2176 } 2177 break; 2178 } 2179 break; 2180 } 2181 frm += frm[1] + 2; 2182 } 2183 2184 /* 2185 * Verify the contents of the frame. 2186 * If it fails validation, close the peer link. 2187 */ 2188 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2189 sendclose = 1; 2190 IEEE80211_DISCARD(vap, 2191 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2192 wh, NULL, "%s", "MPM validation failed"); 2193 } 2194 2195 /* If meshid is not the same reject any frames type. */ 2196 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2197 sendclose = 1; 2198 IEEE80211_DISCARD(vap, 2199 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2200 wh, NULL, "%s", "not for our mesh"); 2201 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2202 /* 2203 * Standard not clear about this, if we dont ignore 2204 * there will be an endless loop between nodes sending 2205 * CLOSE frames between each other with wrong meshid. 2206 * Discard and timers will bring FSM to IDLE state. 2207 */ 2208 return NULL; 2209 } 2210 } 2211 2212 /* 2213 * Close frames are accepted if meshid is the same. 2214 * Verify the other two types. 2215 */ 2216 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2217 mesh_verify_meshconf(vap, meshconf)) { 2218 sendclose = 1; 2219 IEEE80211_DISCARD(vap, 2220 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2221 wh, NULL, "%s", "configuration missmatch"); 2222 } 2223 2224 if (sendclose) { 2225 vap->iv_stats.is_rx_mgtdiscard++; 2226 switch (ni->ni_mlstate) { 2227 case IEEE80211_NODE_MESH_IDLE: 2228 case IEEE80211_NODE_MESH_ESTABLISHED: 2229 case IEEE80211_NODE_MESH_HOLDING: 2230 /* ignore */ 2231 break; 2232 case IEEE80211_NODE_MESH_OPENSNT: 2233 case IEEE80211_NODE_MESH_OPENRCV: 2234 case IEEE80211_NODE_MESH_CONFIRMRCV: 2235 args[0] = ni->ni_mlpid; 2236 args[1] = ni->ni_mllid; 2237 /* Reason codes for rejection */ 2238 switch (subtype) { 2239 case IEEE80211_ACTION_MESHPEERING_OPEN: 2240 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2241 break; 2242 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2243 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2244 break; 2245 } 2246 ieee80211_send_action(ni, 2247 IEEE80211_ACTION_CAT_SELF_PROT, 2248 IEEE80211_ACTION_MESHPEERING_CLOSE, 2249 args); 2250 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2251 mesh_peer_timeout_setup(ni); 2252 break; 2253 } 2254 return NULL; 2255 } 2256 2257 return (const struct ieee80211_meshpeer_ie *) mp; 2258} 2259 2260static int 2261mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2262 const struct ieee80211_frame *wh, 2263 const uint8_t *frm, const uint8_t *efrm) 2264{ 2265 struct ieee80211vap *vap = ni->ni_vap; 2266 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2267 struct ieee80211_meshpeer_ie ie; 2268 const struct ieee80211_meshpeer_ie *meshpeer; 2269 uint16_t args[3]; 2270 2271 /* +2+2 for action + code + capabilites */ 2272 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2273 IEEE80211_ACTION_MESHPEERING_OPEN); 2274 if (meshpeer == NULL) { 2275 return 0; 2276 } 2277 2278 /* XXX move up */ 2279 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2280 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2281 2282 switch (ni->ni_mlstate) { 2283 case IEEE80211_NODE_MESH_IDLE: 2284 /* Reject open request if reached our maximum neighbor count */ 2285 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2286 args[0] = meshpeer->peer_llinkid; 2287 args[1] = 0; 2288 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2289 ieee80211_send_action(ni, 2290 IEEE80211_ACTION_CAT_SELF_PROT, 2291 IEEE80211_ACTION_MESHPEERING_CLOSE, 2292 args); 2293 /* stay in IDLE state */ 2294 return (0); 2295 } 2296 /* Open frame accepted */ 2297 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2298 ni->ni_mllid = meshpeer->peer_llinkid; 2299 ni->ni_mlpid = mesh_generateid(vap); 2300 if (ni->ni_mlpid == 0) 2301 return 0; /* XXX */ 2302 args[0] = ni->ni_mlpid; 2303 /* Announce we're open too... */ 2304 ieee80211_send_action(ni, 2305 IEEE80211_ACTION_CAT_SELF_PROT, 2306 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2307 /* ...and confirm the link. */ 2308 args[0] = ni->ni_mlpid; 2309 args[1] = ni->ni_mllid; 2310 ieee80211_send_action(ni, 2311 IEEE80211_ACTION_CAT_SELF_PROT, 2312 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2313 args); 2314 mesh_peer_timeout_setup(ni); 2315 break; 2316 case IEEE80211_NODE_MESH_OPENRCV: 2317 /* Wrong Link ID */ 2318 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2319 args[0] = ni->ni_mllid; 2320 args[1] = ni->ni_mlpid; 2321 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2322 ieee80211_send_action(ni, 2323 IEEE80211_ACTION_CAT_SELF_PROT, 2324 IEEE80211_ACTION_MESHPEERING_CLOSE, 2325 args); 2326 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2327 mesh_peer_timeout_setup(ni); 2328 break; 2329 } 2330 /* Duplicate open, confirm again. */ 2331 args[0] = ni->ni_mlpid; 2332 args[1] = ni->ni_mllid; 2333 ieee80211_send_action(ni, 2334 IEEE80211_ACTION_CAT_SELF_PROT, 2335 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2336 args); 2337 break; 2338 case IEEE80211_NODE_MESH_OPENSNT: 2339 ni->ni_mllid = meshpeer->peer_llinkid; 2340 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2341 args[0] = ni->ni_mlpid; 2342 args[1] = ni->ni_mllid; 2343 ieee80211_send_action(ni, 2344 IEEE80211_ACTION_CAT_SELF_PROT, 2345 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2346 args); 2347 /* NB: don't setup/clear any timeout */ 2348 break; 2349 case IEEE80211_NODE_MESH_CONFIRMRCV: 2350 if (ni->ni_mlpid != meshpeer->peer_linkid || 2351 ni->ni_mllid != meshpeer->peer_llinkid) { 2352 args[0] = ni->ni_mlpid; 2353 args[1] = ni->ni_mllid; 2354 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2355 ieee80211_send_action(ni, 2356 IEEE80211_ACTION_CAT_SELF_PROT, 2357 IEEE80211_ACTION_MESHPEERING_CLOSE, 2358 args); 2359 mesh_linkchange(ni, 2360 IEEE80211_NODE_MESH_HOLDING); 2361 mesh_peer_timeout_setup(ni); 2362 break; 2363 } 2364 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2365 ni->ni_mllid = meshpeer->peer_llinkid; 2366 args[0] = ni->ni_mlpid; 2367 args[1] = ni->ni_mllid; 2368 ieee80211_send_action(ni, 2369 IEEE80211_ACTION_CAT_SELF_PROT, 2370 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2371 args); 2372 mesh_peer_timeout_stop(ni); 2373 break; 2374 case IEEE80211_NODE_MESH_ESTABLISHED: 2375 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2376 args[0] = ni->ni_mllid; 2377 args[1] = ni->ni_mlpid; 2378 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2379 ieee80211_send_action(ni, 2380 IEEE80211_ACTION_CAT_SELF_PROT, 2381 IEEE80211_ACTION_MESHPEERING_CLOSE, 2382 args); 2383 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2384 mesh_peer_timeout_setup(ni); 2385 break; 2386 } 2387 args[0] = ni->ni_mlpid; 2388 args[1] = ni->ni_mllid; 2389 ieee80211_send_action(ni, 2390 IEEE80211_ACTION_CAT_SELF_PROT, 2391 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2392 args); 2393 break; 2394 case IEEE80211_NODE_MESH_HOLDING: 2395 args[0] = ni->ni_mlpid; 2396 args[1] = meshpeer->peer_llinkid; 2397 /* Standard not clear about what the reaason code should be */ 2398 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2399 ieee80211_send_action(ni, 2400 IEEE80211_ACTION_CAT_SELF_PROT, 2401 IEEE80211_ACTION_MESHPEERING_CLOSE, 2402 args); 2403 break; 2404 } 2405 return 0; 2406} 2407 2408static int 2409mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2410 const struct ieee80211_frame *wh, 2411 const uint8_t *frm, const uint8_t *efrm) 2412{ 2413 struct ieee80211vap *vap = ni->ni_vap; 2414 struct ieee80211_meshpeer_ie ie; 2415 const struct ieee80211_meshpeer_ie *meshpeer; 2416 uint16_t args[3]; 2417 2418 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2419 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2420 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2421 if (meshpeer == NULL) { 2422 return 0; 2423 } 2424 2425 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2426 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2427 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2428 2429 switch (ni->ni_mlstate) { 2430 case IEEE80211_NODE_MESH_OPENRCV: 2431 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2432 mesh_peer_timeout_stop(ni); 2433 break; 2434 case IEEE80211_NODE_MESH_OPENSNT: 2435 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2436 mesh_peer_timeout_setup(ni); 2437 break; 2438 case IEEE80211_NODE_MESH_HOLDING: 2439 args[0] = ni->ni_mlpid; 2440 args[1] = meshpeer->peer_llinkid; 2441 /* Standard not clear about what the reaason code should be */ 2442 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2443 ieee80211_send_action(ni, 2444 IEEE80211_ACTION_CAT_SELF_PROT, 2445 IEEE80211_ACTION_MESHPEERING_CLOSE, 2446 args); 2447 break; 2448 case IEEE80211_NODE_MESH_CONFIRMRCV: 2449 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2450 args[0] = ni->ni_mlpid; 2451 args[1] = ni->ni_mllid; 2452 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2453 ieee80211_send_action(ni, 2454 IEEE80211_ACTION_CAT_SELF_PROT, 2455 IEEE80211_ACTION_MESHPEERING_CLOSE, 2456 args); 2457 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2458 mesh_peer_timeout_setup(ni); 2459 } 2460 break; 2461 default: 2462 IEEE80211_DISCARD(vap, 2463 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2464 wh, NULL, "received confirm in invalid state %d", 2465 ni->ni_mlstate); 2466 vap->iv_stats.is_rx_mgtdiscard++; 2467 break; 2468 } 2469 return 0; 2470} 2471 2472static int 2473mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2474 const struct ieee80211_frame *wh, 2475 const uint8_t *frm, const uint8_t *efrm) 2476{ 2477 struct ieee80211_meshpeer_ie ie; 2478 const struct ieee80211_meshpeer_ie *meshpeer; 2479 uint16_t args[3]; 2480 2481 /* +2 for action + code */ 2482 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2483 IEEE80211_ACTION_MESHPEERING_CLOSE); 2484 if (meshpeer == NULL) { 2485 return 0; 2486 } 2487 2488 /* 2489 * XXX: check reason code, for example we could receive 2490 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2491 * to peer again. 2492 */ 2493 2494 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2495 ni, "%s", "recv PEER CLOSE"); 2496 2497 switch (ni->ni_mlstate) { 2498 case IEEE80211_NODE_MESH_IDLE: 2499 /* ignore */ 2500 break; 2501 case IEEE80211_NODE_MESH_OPENRCV: 2502 case IEEE80211_NODE_MESH_OPENSNT: 2503 case IEEE80211_NODE_MESH_CONFIRMRCV: 2504 case IEEE80211_NODE_MESH_ESTABLISHED: 2505 args[0] = ni->ni_mlpid; 2506 args[1] = ni->ni_mllid; 2507 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2508 ieee80211_send_action(ni, 2509 IEEE80211_ACTION_CAT_SELF_PROT, 2510 IEEE80211_ACTION_MESHPEERING_CLOSE, 2511 args); 2512 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2513 mesh_peer_timeout_setup(ni); 2514 break; 2515 case IEEE80211_NODE_MESH_HOLDING: 2516 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2517 mesh_peer_timeout_stop(ni); 2518 break; 2519 } 2520 return 0; 2521} 2522 2523/* 2524 * Link Metric handling. 2525 */ 2526static int 2527mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2528 const struct ieee80211_frame *wh, 2529 const uint8_t *frm, const uint8_t *efrm) 2530{ 2531 const struct ieee80211_meshlmetric_ie *ie = 2532 (const struct ieee80211_meshlmetric_ie *) 2533 (frm+2); /* action + code */ 2534 struct ieee80211_meshlmetric_ie lm_rep; 2535 2536 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2537 lm_rep.lm_flags = 0; 2538 lm_rep.lm_metric = mesh_airtime_calc(ni); 2539 ieee80211_send_action(ni, 2540 IEEE80211_ACTION_CAT_MESH, 2541 IEEE80211_ACTION_MESH_LMETRIC, 2542 &lm_rep); 2543 } 2544 /* XXX: else do nothing for now */ 2545 return 0; 2546} 2547 2548/* 2549 * Parse meshgate action ie's for GANN frames. 2550 * Returns -1 if parsing fails, otherwise 0. 2551 */ 2552static int 2553mesh_parse_meshgate_action(struct ieee80211_node *ni, 2554 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2555 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2556{ 2557 struct ieee80211vap *vap = ni->ni_vap; 2558 const struct ieee80211_meshgann_ie *gannie; 2559 2560 while (efrm - frm > 1) { 2561 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2562 switch (*frm) { 2563 case IEEE80211_ELEMID_MESHGANN: 2564 gannie = (const struct ieee80211_meshgann_ie *) frm; 2565 memset(ie, 0, sizeof(*ie)); 2566 ie->gann_ie = gannie->gann_ie; 2567 ie->gann_len = gannie->gann_len; 2568 ie->gann_flags = gannie->gann_flags; 2569 ie->gann_hopcount = gannie->gann_hopcount; 2570 ie->gann_ttl = gannie->gann_ttl; 2571 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2572 ie->gann_seq = LE_READ_4(&gannie->gann_seq); 2573 ie->gann_interval = LE_READ_2(&gannie->gann_interval); 2574 break; 2575 } 2576 frm += frm[1] + 2; 2577 } 2578 2579 return 0; 2580} 2581 2582/* 2583 * Mesh Gate Announcement handling. 2584 */ 2585static int 2586mesh_recv_action_meshgate(struct ieee80211_node *ni, 2587 const struct ieee80211_frame *wh, 2588 const uint8_t *frm, const uint8_t *efrm) 2589{ 2590 struct ieee80211vap *vap = ni->ni_vap; 2591 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2592 struct ieee80211_mesh_gate_route *gr, *next; 2593 struct ieee80211_mesh_route *rt_gate; 2594 struct ieee80211_meshgann_ie pgann; 2595 struct ieee80211_meshgann_ie ie; 2596 int found = 0; 2597 2598 /* +2 for action + code */ 2599 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2600 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2601 ni->ni_macaddr, NULL, "%s", 2602 "GANN parsing failed"); 2603 vap->iv_stats.is_rx_mgtdiscard++; 2604 return (0); 2605 } 2606 2607 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2608 return 0; 2609 2610 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2611 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2612 ie.gann_seq); 2613 2614 if (ms == NULL) 2615 return (0); 2616 MESH_RT_LOCK(ms); 2617 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2618 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2619 continue; 2620 if (ie.gann_seq <= gr->gr_lastseq) { 2621 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2622 ni->ni_macaddr, NULL, 2623 "GANN old seqno %u <= %u", 2624 ie.gann_seq, gr->gr_lastseq); 2625 MESH_RT_UNLOCK(ms); 2626 return (0); 2627 } 2628 /* corresponding mesh gate found & GANN accepted */ 2629 found = 1; 2630 break; 2631 2632 } 2633 if (found == 0) { 2634 /* this GANN is from a new mesh Gate add it to known table. */ 2635 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2636 "stored new GANN information, seq %u.", ie.gann_seq); 2637 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2638 M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO); 2639 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2640 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2641 } 2642 gr->gr_lastseq = ie.gann_seq; 2643 2644 /* check if we have a path to this gate */ 2645 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2646 if (rt_gate != NULL && 2647 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2648 gr->gr_route = rt_gate; 2649 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2650 } 2651 2652 MESH_RT_UNLOCK(ms); 2653 2654 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2655 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2656 return 0; 2657 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2658 pgann.gann_hopcount = ie.gann_hopcount + 1; 2659 pgann.gann_ttl = ie.gann_ttl - 1; 2660 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2661 pgann.gann_seq = ie.gann_seq; 2662 pgann.gann_interval = ie.gann_interval; 2663 2664 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2665 "%s", "propagate GANN"); 2666 2667 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2668 IEEE80211_ACTION_MESH_GANN, &pgann); 2669 2670 return 0; 2671} 2672 2673static int 2674mesh_send_action(struct ieee80211_node *ni, 2675 const uint8_t sa[IEEE80211_ADDR_LEN], 2676 const uint8_t da[IEEE80211_ADDR_LEN], 2677 struct mbuf *m) 2678{ 2679 struct ieee80211vap *vap = ni->ni_vap; 2680 struct ieee80211com *ic = ni->ni_ic; 2681 struct ieee80211_bpf_params params; 2682 struct ieee80211_frame *wh; 2683 int ret; 2684 2685 KASSERT(ni != NULL, ("null node")); 2686 2687 if (vap->iv_state == IEEE80211_S_CAC) { 2688 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2689 "block %s frame in CAC state", "Mesh action"); 2690 vap->iv_stats.is_tx_badstate++; 2691 ieee80211_free_node(ni); 2692 m_freem(m); 2693 return EIO; /* XXX */ 2694 } 2695 2696 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2697 if (m == NULL) { 2698 ieee80211_free_node(ni); 2699 return ENOMEM; 2700 } 2701 2702 IEEE80211_TX_LOCK(ic); 2703 wh = mtod(m, struct ieee80211_frame *); 2704 ieee80211_send_setup(ni, m, 2705 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2706 IEEE80211_NONQOS_TID, sa, da, sa); 2707 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2708 2709 memset(¶ms, 0, sizeof(params)); 2710 params.ibp_pri = WME_AC_VO; 2711 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2712 if (IEEE80211_IS_MULTICAST(da)) 2713 params.ibp_try0 = 1; 2714 else 2715 params.ibp_try0 = ni->ni_txparms->maxretry; 2716 params.ibp_power = ni->ni_txpower; 2717 2718 IEEE80211_NODE_STAT(ni, tx_mgmt); 2719 2720 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2721 IEEE80211_TX_UNLOCK(ic); 2722 return (ret); 2723} 2724 2725#define ADDSHORT(frm, v) do { \ 2726 frm[0] = (v) & 0xff; \ 2727 frm[1] = (v) >> 8; \ 2728 frm += 2; \ 2729} while (0) 2730#define ADDWORD(frm, v) do { \ 2731 frm[0] = (v) & 0xff; \ 2732 frm[1] = ((v) >> 8) & 0xff; \ 2733 frm[2] = ((v) >> 16) & 0xff; \ 2734 frm[3] = ((v) >> 24) & 0xff; \ 2735 frm += 4; \ 2736} while (0) 2737 2738static int 2739mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2740 int category, int action, void *args0) 2741{ 2742 struct ieee80211vap *vap = ni->ni_vap; 2743 struct ieee80211com *ic = ni->ni_ic; 2744 uint16_t *args = args0; 2745 const struct ieee80211_rateset *rs; 2746 struct mbuf *m; 2747 uint8_t *frm; 2748 2749 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2750 "send PEER OPEN action: localid 0x%x", args[0]); 2751 2752 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2753 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2754 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2755 ieee80211_ref_node(ni); 2756 2757 m = ieee80211_getmgtframe(&frm, 2758 ic->ic_headroom + sizeof(struct ieee80211_frame), 2759 sizeof(uint16_t) /* action+category */ 2760 + sizeof(uint16_t) /* capabilites */ 2761 + 2 + IEEE80211_RATE_SIZE 2762 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2763 + 2 + IEEE80211_MESHID_LEN 2764 + sizeof(struct ieee80211_meshconf_ie) 2765 + sizeof(struct ieee80211_meshpeer_ie) 2766 ); 2767 if (m != NULL) { 2768 /* 2769 * mesh peer open action frame format: 2770 * [1] category 2771 * [1] action 2772 * [2] capabilities 2773 * [tlv] rates 2774 * [tlv] xrates 2775 * [tlv] mesh id 2776 * [tlv] mesh conf 2777 * [tlv] mesh peer link mgmt 2778 */ 2779 *frm++ = category; 2780 *frm++ = action; 2781 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2782 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2783 frm = ieee80211_add_rates(frm, rs); 2784 frm = ieee80211_add_xrates(frm, rs); 2785 frm = ieee80211_add_meshid(frm, vap); 2786 frm = ieee80211_add_meshconf(frm, vap); 2787 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2788 args[0], 0, 0); 2789 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2790 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2791 } else { 2792 vap->iv_stats.is_tx_nobuf++; 2793 ieee80211_free_node(ni); 2794 return ENOMEM; 2795 } 2796} 2797 2798static int 2799mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2800 int category, int action, void *args0) 2801{ 2802 struct ieee80211vap *vap = ni->ni_vap; 2803 struct ieee80211com *ic = ni->ni_ic; 2804 uint16_t *args = args0; 2805 const struct ieee80211_rateset *rs; 2806 struct mbuf *m; 2807 uint8_t *frm; 2808 2809 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2810 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2811 args[0], args[1]); 2812 2813 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2814 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2815 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2816 ieee80211_ref_node(ni); 2817 2818 m = ieee80211_getmgtframe(&frm, 2819 ic->ic_headroom + sizeof(struct ieee80211_frame), 2820 sizeof(uint16_t) /* action+category */ 2821 + sizeof(uint16_t) /* capabilites */ 2822 + sizeof(uint16_t) /* status code */ 2823 + sizeof(uint16_t) /* AID */ 2824 + 2 + IEEE80211_RATE_SIZE 2825 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2826 + 2 + IEEE80211_MESHID_LEN 2827 + sizeof(struct ieee80211_meshconf_ie) 2828 + sizeof(struct ieee80211_meshpeer_ie) 2829 ); 2830 if (m != NULL) { 2831 /* 2832 * mesh peer confirm action frame format: 2833 * [1] category 2834 * [1] action 2835 * [2] capabilities 2836 * [2] status code 2837 * [2] association id (peer ID) 2838 * [tlv] rates 2839 * [tlv] xrates 2840 * [tlv] mesh id 2841 * [tlv] mesh conf 2842 * [tlv] mesh peer link mgmt 2843 */ 2844 *frm++ = category; 2845 *frm++ = action; 2846 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2847 ADDSHORT(frm, 0); /* status code */ 2848 ADDSHORT(frm, args[1]); /* AID */ 2849 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2850 frm = ieee80211_add_rates(frm, rs); 2851 frm = ieee80211_add_xrates(frm, rs); 2852 frm = ieee80211_add_meshid(frm, vap); 2853 frm = ieee80211_add_meshconf(frm, vap); 2854 frm = ieee80211_add_meshpeer(frm, 2855 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2856 args[0], args[1], 0); 2857 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2858 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2859 } else { 2860 vap->iv_stats.is_tx_nobuf++; 2861 ieee80211_free_node(ni); 2862 return ENOMEM; 2863 } 2864} 2865 2866static int 2867mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2868 int category, int action, void *args0) 2869{ 2870 struct ieee80211vap *vap = ni->ni_vap; 2871 struct ieee80211com *ic = ni->ni_ic; 2872 uint16_t *args = args0; 2873 struct mbuf *m; 2874 uint8_t *frm; 2875 2876 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2877 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2878 args[0], args[1], args[2]); 2879 2880 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2881 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2882 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2883 ieee80211_ref_node(ni); 2884 2885 m = ieee80211_getmgtframe(&frm, 2886 ic->ic_headroom + sizeof(struct ieee80211_frame), 2887 sizeof(uint16_t) /* action+category */ 2888 + sizeof(uint16_t) /* reason code */ 2889 + 2 + IEEE80211_MESHID_LEN 2890 + sizeof(struct ieee80211_meshpeer_ie) 2891 ); 2892 if (m != NULL) { 2893 /* 2894 * mesh peer close action frame format: 2895 * [1] category 2896 * [1] action 2897 * [tlv] mesh id 2898 * [tlv] mesh peer link mgmt 2899 */ 2900 *frm++ = category; 2901 *frm++ = action; 2902 frm = ieee80211_add_meshid(frm, vap); 2903 frm = ieee80211_add_meshpeer(frm, 2904 IEEE80211_ACTION_MESHPEERING_CLOSE, 2905 args[0], args[1], args[2]); 2906 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2907 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2908 } else { 2909 vap->iv_stats.is_tx_nobuf++; 2910 ieee80211_free_node(ni); 2911 return ENOMEM; 2912 } 2913} 2914 2915static int 2916mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2917 int category, int action, void *arg0) 2918{ 2919 struct ieee80211vap *vap = ni->ni_vap; 2920 struct ieee80211com *ic = ni->ni_ic; 2921 struct ieee80211_meshlmetric_ie *ie = arg0; 2922 struct mbuf *m; 2923 uint8_t *frm; 2924 2925 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2926 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2927 ni, "%s", "send LINK METRIC REQUEST action"); 2928 } else { 2929 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2930 ni, "send LINK METRIC REPLY action: metric 0x%x", 2931 ie->lm_metric); 2932 } 2933 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2934 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2935 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2936 ieee80211_ref_node(ni); 2937 2938 m = ieee80211_getmgtframe(&frm, 2939 ic->ic_headroom + sizeof(struct ieee80211_frame), 2940 sizeof(uint16_t) + /* action+category */ 2941 sizeof(struct ieee80211_meshlmetric_ie) 2942 ); 2943 if (m != NULL) { 2944 /* 2945 * mesh link metric 2946 * [1] category 2947 * [1] action 2948 * [tlv] mesh link metric 2949 */ 2950 *frm++ = category; 2951 *frm++ = action; 2952 frm = ieee80211_add_meshlmetric(frm, 2953 ie->lm_flags, ie->lm_metric); 2954 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2955 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2956 } else { 2957 vap->iv_stats.is_tx_nobuf++; 2958 ieee80211_free_node(ni); 2959 return ENOMEM; 2960 } 2961} 2962 2963static int 2964mesh_send_action_meshgate(struct ieee80211_node *ni, 2965 int category, int action, void *arg0) 2966{ 2967 struct ieee80211vap *vap = ni->ni_vap; 2968 struct ieee80211com *ic = ni->ni_ic; 2969 struct ieee80211_meshgann_ie *ie = arg0; 2970 struct mbuf *m; 2971 uint8_t *frm; 2972 2973 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2974 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2975 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2976 ieee80211_ref_node(ni); 2977 2978 m = ieee80211_getmgtframe(&frm, 2979 ic->ic_headroom + sizeof(struct ieee80211_frame), 2980 sizeof(uint16_t) + /* action+category */ 2981 IEEE80211_MESHGANN_BASE_SZ 2982 ); 2983 if (m != NULL) { 2984 /* 2985 * mesh link metric 2986 * [1] category 2987 * [1] action 2988 * [tlv] mesh gate annoucement 2989 */ 2990 *frm++ = category; 2991 *frm++ = action; 2992 frm = ieee80211_add_meshgate(frm, ie); 2993 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2994 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 2995 } else { 2996 vap->iv_stats.is_tx_nobuf++; 2997 ieee80211_free_node(ni); 2998 return ENOMEM; 2999 } 3000} 3001 3002static void 3003mesh_peer_timeout_setup(struct ieee80211_node *ni) 3004{ 3005 switch (ni->ni_mlstate) { 3006 case IEEE80211_NODE_MESH_HOLDING: 3007 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 3008 break; 3009 case IEEE80211_NODE_MESH_CONFIRMRCV: 3010 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 3011 break; 3012 case IEEE80211_NODE_MESH_IDLE: 3013 ni->ni_mltval = 0; 3014 break; 3015 default: 3016 ni->ni_mltval = ieee80211_mesh_retrytimeout; 3017 break; 3018 } 3019 if (ni->ni_mltval) 3020 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 3021 mesh_peer_timeout_cb, ni); 3022} 3023 3024/* 3025 * Same as above but backoffs timer statisically 50%. 3026 */ 3027static void 3028mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3029{ 3030 uint32_t r; 3031 3032 r = arc4random(); 3033 ni->ni_mltval += r % ni->ni_mltval; 3034 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3035 ni); 3036} 3037 3038static __inline void 3039mesh_peer_timeout_stop(struct ieee80211_node *ni) 3040{ 3041 callout_drain(&ni->ni_mltimer); 3042} 3043 3044static void 3045mesh_peer_backoff_cb(void *arg) 3046{ 3047 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3048 3049 /* After backoff timeout, try to peer automatically again. */ 3050 ni->ni_mlhcnt = 0; 3051} 3052 3053/* 3054 * Mesh Peer Link Management FSM timeout handling. 3055 */ 3056static void 3057mesh_peer_timeout_cb(void *arg) 3058{ 3059 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3060 uint16_t args[3]; 3061 3062 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3063 ni, "mesh link timeout, state %d, retry counter %d", 3064 ni->ni_mlstate, ni->ni_mlrcnt); 3065 3066 switch (ni->ni_mlstate) { 3067 case IEEE80211_NODE_MESH_IDLE: 3068 case IEEE80211_NODE_MESH_ESTABLISHED: 3069 break; 3070 case IEEE80211_NODE_MESH_OPENSNT: 3071 case IEEE80211_NODE_MESH_OPENRCV: 3072 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3073 args[0] = ni->ni_mlpid; 3074 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3075 ieee80211_send_action(ni, 3076 IEEE80211_ACTION_CAT_SELF_PROT, 3077 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3078 ni->ni_mlrcnt = 0; 3079 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3080 mesh_peer_timeout_setup(ni); 3081 } else { 3082 args[0] = ni->ni_mlpid; 3083 ieee80211_send_action(ni, 3084 IEEE80211_ACTION_CAT_SELF_PROT, 3085 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3086 ni->ni_mlrcnt++; 3087 mesh_peer_timeout_backoff(ni); 3088 } 3089 break; 3090 case IEEE80211_NODE_MESH_CONFIRMRCV: 3091 args[0] = ni->ni_mlpid; 3092 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3093 ieee80211_send_action(ni, 3094 IEEE80211_ACTION_CAT_SELF_PROT, 3095 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3096 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3097 mesh_peer_timeout_setup(ni); 3098 break; 3099 case IEEE80211_NODE_MESH_HOLDING: 3100 ni->ni_mlhcnt++; 3101 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3102 callout_reset(&ni->ni_mlhtimer, 3103 ieee80211_mesh_backofftimeout, 3104 mesh_peer_backoff_cb, ni); 3105 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3106 break; 3107 } 3108} 3109 3110static int 3111mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3112{ 3113 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3114 3115 if (ie == NULL || ie[1] != ms->ms_idlen) 3116 return 1; 3117 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3118} 3119 3120/* 3121 * Check if we are using the same algorithms for this mesh. 3122 */ 3123static int 3124mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3125{ 3126 const struct ieee80211_meshconf_ie *meshconf = 3127 (const struct ieee80211_meshconf_ie *) ie; 3128 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3129 3130 if (meshconf == NULL) 3131 return 1; 3132 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3133 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3134 "unknown path selection algorithm: 0x%x\n", 3135 meshconf->conf_pselid); 3136 return 1; 3137 } 3138 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3139 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3140 "unknown path metric algorithm: 0x%x\n", 3141 meshconf->conf_pmetid); 3142 return 1; 3143 } 3144 if (meshconf->conf_ccid != 0) { 3145 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3146 "unknown congestion control algorithm: 0x%x\n", 3147 meshconf->conf_ccid); 3148 return 1; 3149 } 3150 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3151 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3152 "unknown sync algorithm: 0x%x\n", 3153 meshconf->conf_syncid); 3154 return 1; 3155 } 3156 if (meshconf->conf_authid != 0) { 3157 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3158 "unknown auth auth algorithm: 0x%x\n", 3159 meshconf->conf_pselid); 3160 return 1; 3161 } 3162 /* Not accepting peers */ 3163 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3164 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3165 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3166 return 1; 3167 } 3168 return 0; 3169} 3170 3171static int 3172mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3173 const uint8_t *ie) 3174{ 3175 const struct ieee80211_meshpeer_ie *meshpeer = 3176 (const struct ieee80211_meshpeer_ie *) ie; 3177 3178 if (meshpeer == NULL || 3179 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3180 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3181 return 1; 3182 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3183 IEEE80211_DPRINTF(vap, 3184 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3185 "Only MPM protocol is supported (proto: 0x%02X)", 3186 meshpeer->peer_proto); 3187 return 1; 3188 } 3189 switch (subtype) { 3190 case IEEE80211_ACTION_MESHPEERING_OPEN: 3191 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3192 return 1; 3193 break; 3194 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3195 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3196 return 1; 3197 break; 3198 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3199 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3200 return 1; 3201 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3202 meshpeer->peer_linkid != 0) 3203 return 1; 3204 if (meshpeer->peer_rcode == 0) 3205 return 1; 3206 break; 3207 } 3208 return 0; 3209} 3210 3211/* 3212 * Add a Mesh ID IE to a frame. 3213 */ 3214uint8_t * 3215ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3216{ 3217 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3218 3219 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3220 3221 *frm++ = IEEE80211_ELEMID_MESHID; 3222 *frm++ = ms->ms_idlen; 3223 memcpy(frm, ms->ms_id, ms->ms_idlen); 3224 return frm + ms->ms_idlen; 3225} 3226 3227/* 3228 * Add a Mesh Configuration IE to a frame. 3229 * For now just use HWMP routing, Airtime link metric, Null Congestion 3230 * Signaling, Null Sync Protocol and Null Authentication. 3231 */ 3232uint8_t * 3233ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3234{ 3235 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3236 uint16_t caps; 3237 3238 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3239 3240 *frm++ = IEEE80211_ELEMID_MESHCONF; 3241 *frm++ = IEEE80211_MESH_CONF_SZ; 3242 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3243 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3244 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3245 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3246 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3247 /* NB: set the number of neighbors before the rest */ 3248 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3249 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3250 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3251 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3252 frm += 1; 3253 caps = 0; 3254 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3255 caps |= IEEE80211_MESHCONF_CAP_AP; 3256 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3257 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3258 *frm++ = caps; 3259 return frm; 3260} 3261 3262/* 3263 * Add a Mesh Peer Management IE to a frame. 3264 */ 3265uint8_t * 3266ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3267 uint16_t peerid, uint16_t reason) 3268{ 3269 3270 KASSERT(localid != 0, ("localid == 0")); 3271 3272 *frm++ = IEEE80211_ELEMID_MESHPEER; 3273 switch (subtype) { 3274 case IEEE80211_ACTION_MESHPEERING_OPEN: 3275 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3276 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3277 ADDSHORT(frm, localid); /* local ID */ 3278 break; 3279 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3280 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3281 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3282 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3283 ADDSHORT(frm, localid); /* local ID */ 3284 ADDSHORT(frm, peerid); /* peer ID */ 3285 break; 3286 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3287 if (peerid) 3288 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3289 else 3290 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3291 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3292 ADDSHORT(frm, localid); /* local ID */ 3293 if (peerid) 3294 ADDSHORT(frm, peerid); /* peer ID */ 3295 ADDSHORT(frm, reason); 3296 break; 3297 } 3298 return frm; 3299} 3300 3301/* 3302 * Compute an Airtime Link Metric for the link with this node. 3303 * 3304 * Based on Draft 3.0 spec (11B.10, p.149). 3305 */ 3306/* 3307 * Max 802.11s overhead. 3308 */ 3309#define IEEE80211_MESH_MAXOVERHEAD \ 3310 (sizeof(struct ieee80211_qosframe_addr4) \ 3311 + sizeof(struct ieee80211_meshcntl_ae10) \ 3312 + sizeof(struct llc) \ 3313 + IEEE80211_ADDR_LEN \ 3314 + IEEE80211_WEP_IVLEN \ 3315 + IEEE80211_WEP_KIDLEN \ 3316 + IEEE80211_WEP_CRCLEN \ 3317 + IEEE80211_WEP_MICLEN \ 3318 + IEEE80211_CRC_LEN) 3319uint32_t 3320mesh_airtime_calc(struct ieee80211_node *ni) 3321{ 3322#define M_BITS 8 3323#define S_FACTOR (2 * M_BITS) 3324 struct ieee80211com *ic = ni->ni_ic; 3325 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3326 const static int nbits = 8192 << M_BITS; 3327 uint32_t overhead, rate, errrate; 3328 uint64_t res; 3329 3330 /* Time to transmit a frame */ 3331 rate = ni->ni_txrate; 3332 overhead = ieee80211_compute_duration(ic->ic_rt, 3333 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3334 /* Error rate in percentage */ 3335 /* XXX assuming small failures are ok */ 3336 errrate = (((ifp->if_oerrors + 3337 ifp->if_ierrors) / 100) << M_BITS) / 100; 3338 res = (overhead + (nbits / rate)) * 3339 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3340 3341 return (uint32_t)(res >> S_FACTOR); 3342#undef M_BITS 3343#undef S_FACTOR 3344} 3345 3346/* 3347 * Add a Mesh Link Metric report IE to a frame. 3348 */ 3349uint8_t * 3350ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3351{ 3352 *frm++ = IEEE80211_ELEMID_MESHLINK; 3353 *frm++ = 5; 3354 *frm++ = flags; 3355 ADDWORD(frm, metric); 3356 return frm; 3357} 3358 3359/* 3360 * Add a Mesh Gate Announcement IE to a frame. 3361 */ 3362uint8_t * 3363ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3364{ 3365 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3366 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3367 *frm++ = ie->gann_flags; 3368 *frm++ = ie->gann_hopcount; 3369 *frm++ = ie->gann_ttl; 3370 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3371 frm += 6; 3372 ADDWORD(frm, ie->gann_seq); 3373 ADDSHORT(frm, ie->gann_interval); 3374 return frm; 3375} 3376#undef ADDSHORT 3377#undef ADDWORD 3378 3379/* 3380 * Initialize any mesh-specific node state. 3381 */ 3382void 3383ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3384{ 3385 ni->ni_flags |= IEEE80211_NODE_QOS; 3386 callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE); 3387 callout_init(&ni->ni_mlhtimer, CALLOUT_MPSAFE); 3388} 3389 3390/* 3391 * Cleanup any mesh-specific node state. 3392 */ 3393void 3394ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3395{ 3396 struct ieee80211vap *vap = ni->ni_vap; 3397 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3398 3399 callout_drain(&ni->ni_mltimer); 3400 callout_drain(&ni->ni_mlhtimer); 3401 /* NB: short-circuit callbacks after mesh_vdetach */ 3402 if (vap->iv_mesh != NULL) 3403 ms->ms_ppath->mpp_peerdown(ni); 3404} 3405 3406void 3407ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3408{ 3409 ni->ni_meshidlen = ie[1]; 3410 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3411} 3412 3413/* 3414 * Setup mesh-specific node state on neighbor discovery. 3415 */ 3416void 3417ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3418 const struct ieee80211_frame *wh, 3419 const struct ieee80211_scanparams *sp) 3420{ 3421 ieee80211_parse_meshid(ni, sp->meshid); 3422} 3423 3424void 3425ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3426 struct ieee80211_beacon_offsets *bo) 3427{ 3428 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3429 3430 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3431 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3432 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3433 } 3434} 3435 3436static int 3437mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3438{ 3439 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3440 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3441 struct ieee80211_mesh_route *rt; 3442 struct ieee80211req_mesh_route *imr; 3443 size_t len, off; 3444 uint8_t *p; 3445 int error; 3446 3447 if (vap->iv_opmode != IEEE80211_M_MBSS) 3448 return ENOSYS; 3449 3450 error = 0; 3451 switch (ireq->i_type) { 3452 case IEEE80211_IOC_MESH_ID: 3453 ireq->i_len = ms->ms_idlen; 3454 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3455 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3456 break; 3457 case IEEE80211_IOC_MESH_AP: 3458 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3459 break; 3460 case IEEE80211_IOC_MESH_FWRD: 3461 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3462 break; 3463 case IEEE80211_IOC_MESH_GATE: 3464 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3465 break; 3466 case IEEE80211_IOC_MESH_TTL: 3467 ireq->i_val = ms->ms_ttl; 3468 break; 3469 case IEEE80211_IOC_MESH_RTCMD: 3470 switch (ireq->i_val) { 3471 case IEEE80211_MESH_RTCMD_LIST: 3472 len = 0; 3473 MESH_RT_LOCK(ms); 3474 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3475 len += sizeof(*imr); 3476 } 3477 MESH_RT_UNLOCK(ms); 3478 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3479 ireq->i_len = len; 3480 return ENOMEM; 3481 } 3482 ireq->i_len = len; 3483 /* XXX M_WAIT? */ 3484 p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO); 3485 if (p == NULL) 3486 return ENOMEM; 3487 off = 0; 3488 MESH_RT_LOCK(ms); 3489 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3490 if (off >= len) 3491 break; 3492 imr = (struct ieee80211req_mesh_route *) 3493 (p + off); 3494 IEEE80211_ADDR_COPY(imr->imr_dest, 3495 rt->rt_dest); 3496 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3497 rt->rt_nexthop); 3498 imr->imr_metric = rt->rt_metric; 3499 imr->imr_nhops = rt->rt_nhops; 3500 imr->imr_lifetime = 3501 ieee80211_mesh_rt_update(rt, 0); 3502 imr->imr_lastmseq = rt->rt_lastmseq; 3503 imr->imr_flags = rt->rt_flags; /* last */ 3504 off += sizeof(*imr); 3505 } 3506 MESH_RT_UNLOCK(ms); 3507 error = copyout(p, (uint8_t *)ireq->i_data, 3508 ireq->i_len); 3509 free(p, M_TEMP); 3510 break; 3511 case IEEE80211_MESH_RTCMD_FLUSH: 3512 case IEEE80211_MESH_RTCMD_ADD: 3513 case IEEE80211_MESH_RTCMD_DELETE: 3514 return EINVAL; 3515 default: 3516 return ENOSYS; 3517 } 3518 break; 3519 case IEEE80211_IOC_MESH_PR_METRIC: 3520 len = strlen(ms->ms_pmetric->mpm_descr); 3521 if (ireq->i_len < len) 3522 return EINVAL; 3523 ireq->i_len = len; 3524 error = copyout(ms->ms_pmetric->mpm_descr, 3525 (uint8_t *)ireq->i_data, len); 3526 break; 3527 case IEEE80211_IOC_MESH_PR_PATH: 3528 len = strlen(ms->ms_ppath->mpp_descr); 3529 if (ireq->i_len < len) 3530 return EINVAL; 3531 ireq->i_len = len; 3532 error = copyout(ms->ms_ppath->mpp_descr, 3533 (uint8_t *)ireq->i_data, len); 3534 break; 3535 default: 3536 return ENOSYS; 3537 } 3538 3539 return error; 3540} 3541IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3542 3543static int 3544mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3545{ 3546 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3547 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3548 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3549 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3550 int error; 3551 3552 if (vap->iv_opmode != IEEE80211_M_MBSS) 3553 return ENOSYS; 3554 3555 error = 0; 3556 switch (ireq->i_type) { 3557 case IEEE80211_IOC_MESH_ID: 3558 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3559 return EINVAL; 3560 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3561 if (error != 0) 3562 break; 3563 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3564 ms->ms_idlen = ireq->i_len; 3565 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3566 error = ENETRESET; 3567 break; 3568 case IEEE80211_IOC_MESH_AP: 3569 if (ireq->i_val) 3570 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3571 else 3572 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3573 error = ENETRESET; 3574 break; 3575 case IEEE80211_IOC_MESH_FWRD: 3576 if (ireq->i_val) 3577 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3578 else 3579 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3580 mesh_gatemode_setup(vap); 3581 break; 3582 case IEEE80211_IOC_MESH_GATE: 3583 if (ireq->i_val) 3584 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3585 else 3586 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3587 break; 3588 case IEEE80211_IOC_MESH_TTL: 3589 ms->ms_ttl = (uint8_t) ireq->i_val; 3590 break; 3591 case IEEE80211_IOC_MESH_RTCMD: 3592 switch (ireq->i_val) { 3593 case IEEE80211_MESH_RTCMD_LIST: 3594 return EINVAL; 3595 case IEEE80211_MESH_RTCMD_FLUSH: 3596 ieee80211_mesh_rt_flush(vap); 3597 break; 3598 case IEEE80211_MESH_RTCMD_ADD: 3599 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3600 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3601 return EINVAL; 3602 error = copyin(ireq->i_data, &tmpaddr, 3603 IEEE80211_ADDR_LEN); 3604 if (error == 0) 3605 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3606 break; 3607 case IEEE80211_MESH_RTCMD_DELETE: 3608 ieee80211_mesh_rt_del(vap, ireq->i_data); 3609 break; 3610 default: 3611 return ENOSYS; 3612 } 3613 break; 3614 case IEEE80211_IOC_MESH_PR_METRIC: 3615 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3616 if (error == 0) { 3617 error = mesh_select_proto_metric(vap, tmpproto); 3618 if (error == 0) 3619 error = ENETRESET; 3620 } 3621 break; 3622 case IEEE80211_IOC_MESH_PR_PATH: 3623 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3624 if (error == 0) { 3625 error = mesh_select_proto_path(vap, tmpproto); 3626 if (error == 0) 3627 error = ENETRESET; 3628 } 3629 break; 3630 default: 3631 return ENOSYS; 3632 } 3633 return error; 3634} 3635IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3636