ieee80211_mesh.c revision 246520
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 246520 2013-02-07 21:32:09Z monthadar $"); 32#endif 33 34/* 35 * IEEE 802.11s Mesh Point (MBSS) support. 36 * 37 * Based on March 2009, D3.0 802.11s draft spec. 38 */ 39#include "opt_inet.h" 40#include "opt_wlan.h" 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/mbuf.h> 45#include <sys/malloc.h> 46#include <sys/kernel.h> 47 48#include <sys/socket.h> 49#include <sys/sockio.h> 50#include <sys/endian.h> 51#include <sys/errno.h> 52#include <sys/proc.h> 53#include <sys/sysctl.h> 54 55#include <net/bpf.h> 56#include <net/if.h> 57#include <net/if_media.h> 58#include <net/if_llc.h> 59#include <net/ethernet.h> 60 61#include <net80211/ieee80211_var.h> 62#include <net80211/ieee80211_action.h> 63#include <net80211/ieee80211_input.h> 64#include <net80211/ieee80211_mesh.h> 65 66static void mesh_rt_flush_invalid(struct ieee80211vap *); 67static int mesh_select_proto_path(struct ieee80211vap *, const char *); 68static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 69static void mesh_vattach(struct ieee80211vap *); 70static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 71static void mesh_rt_cleanup_cb(void *); 72static void mesh_gatemode_setup(struct ieee80211vap *); 73static void mesh_gatemode_cb(void *); 74static void mesh_linkchange(struct ieee80211_node *, 75 enum ieee80211_mesh_mlstate); 76static void mesh_checkid(void *, struct ieee80211_node *); 77static uint32_t mesh_generateid(struct ieee80211vap *); 78static int mesh_checkpseq(struct ieee80211vap *, 79 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 80static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, 81 struct ieee80211_mesh_route *); 82static void mesh_forward(struct ieee80211vap *, struct mbuf *, 83 const struct ieee80211_meshcntl *); 84static int mesh_input(struct ieee80211_node *, struct mbuf *, int, int); 85static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 86 int, int); 87static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 88static void mesh_peer_timeout_setup(struct ieee80211_node *); 89static void mesh_peer_timeout_backoff(struct ieee80211_node *); 90static void mesh_peer_timeout_cb(void *); 91static __inline void 92 mesh_peer_timeout_stop(struct ieee80211_node *); 93static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 94static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 95static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 96 const uint8_t *); 97uint32_t mesh_airtime_calc(struct ieee80211_node *); 98 99/* 100 * Timeout values come from the specification and are in milliseconds. 101 */ 102static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 103 "IEEE 802.11s parameters"); 104static int ieee80211_mesh_gateint = -1; 105SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW, 106 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 107 "mesh gate interval (ms)"); 108static int ieee80211_mesh_retrytimeout = -1; 109SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, 110 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 111 "Retry timeout (msec)"); 112static int ieee80211_mesh_holdingtimeout = -1; 113SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, 114 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 115 "Holding state timeout (msec)"); 116static int ieee80211_mesh_confirmtimeout = -1; 117SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, 118 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 119 "Confirm state timeout (msec)"); 120static int ieee80211_mesh_backofftimeout = -1; 121SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW, 122 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 123 "Backoff timeout (msec). This is to throutles peering forever when " 124 "not receving answer or is rejected by a neighbor"); 125static int ieee80211_mesh_maxretries = 2; 126SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW, 127 &ieee80211_mesh_maxretries, 0, 128 "Maximum retries during peer link establishment"); 129static int ieee80211_mesh_maxholding = 2; 130SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLTYPE_INT | CTLFLAG_RW, 131 &ieee80211_mesh_maxholding, 0, 132 "Maximum times we are allowed to transition to HOLDING state before " 133 "backinoff during peer link establishment"); 134 135static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 136 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 137 138static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 139static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 140static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 141static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 142static ieee80211_recv_action_func mesh_recv_action_meshgate; 143 144static ieee80211_send_action_func mesh_send_action_meshpeering_open; 145static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 146static ieee80211_send_action_func mesh_send_action_meshpeering_close; 147static ieee80211_send_action_func mesh_send_action_meshlmetric; 148static ieee80211_send_action_func mesh_send_action_meshgate; 149 150static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 151 .mpm_descr = "AIRTIME", 152 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 153 .mpm_metric = mesh_airtime_calc, 154}; 155 156static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 157static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 158 159#define RT_ENTRY_LOCK(rt) mtx_lock(&(rt)->rt_lock) 160#define RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED) 161#define RT_ENTRY_UNLOCK(rt) mtx_unlock(&(rt)->rt_lock) 162 163#define MESH_RT_LOCK(ms) mtx_lock(&(ms)->ms_rt_lock) 164#define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED) 165#define MESH_RT_UNLOCK(ms) mtx_unlock(&(ms)->ms_rt_lock) 166 167MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 168MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 169MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 170 171/* The longer one of the lifetime should be stored as new lifetime */ 172#define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 173 174MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 175MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 176 177/* 178 * Helper functions to manipulate the Mesh routing table. 179 */ 180 181static struct ieee80211_mesh_route * 182mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 183 const uint8_t dest[IEEE80211_ADDR_LEN]) 184{ 185 struct ieee80211_mesh_route *rt; 186 187 MESH_RT_LOCK_ASSERT(ms); 188 189 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 190 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 191 return rt; 192 } 193 return NULL; 194} 195 196static struct ieee80211_mesh_route * 197mesh_rt_add_locked(struct ieee80211vap *vap, 198 const uint8_t dest[IEEE80211_ADDR_LEN]) 199{ 200 struct ieee80211_mesh_state *ms = vap->iv_mesh; 201 struct ieee80211_mesh_route *rt; 202 203 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 204 ("%s: adding broadcast to the routing table", __func__)); 205 206 MESH_RT_LOCK_ASSERT(ms); 207 208 rt = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) + 209 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | M_ZERO); 210 if (rt != NULL) { 211 rt->rt_vap = vap; 212 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 213 rt->rt_priv = (void *)ALIGN(&rt[1]); 214 mtx_init(&rt->rt_lock, "MBSS_RT", "802.11s route entry", MTX_DEF); 215 callout_init(&rt->rt_discovery, CALLOUT_MPSAFE); 216 rt->rt_updtime = ticks; /* create time */ 217 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 218 } 219 return rt; 220} 221 222struct ieee80211_mesh_route * 223ieee80211_mesh_rt_find(struct ieee80211vap *vap, 224 const uint8_t dest[IEEE80211_ADDR_LEN]) 225{ 226 struct ieee80211_mesh_state *ms = vap->iv_mesh; 227 struct ieee80211_mesh_route *rt; 228 229 MESH_RT_LOCK(ms); 230 rt = mesh_rt_find_locked(ms, dest); 231 MESH_RT_UNLOCK(ms); 232 return rt; 233} 234 235struct ieee80211_mesh_route * 236ieee80211_mesh_rt_add(struct ieee80211vap *vap, 237 const uint8_t dest[IEEE80211_ADDR_LEN]) 238{ 239 struct ieee80211_mesh_state *ms = vap->iv_mesh; 240 struct ieee80211_mesh_route *rt; 241 242 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 243 ("%s: duplicate entry in the routing table", __func__)); 244 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 245 ("%s: adding self to the routing table", __func__)); 246 247 MESH_RT_LOCK(ms); 248 rt = mesh_rt_add_locked(vap, dest); 249 MESH_RT_UNLOCK(ms); 250 return rt; 251} 252 253/* 254 * Update the route lifetime and returns the updated lifetime. 255 * If new_lifetime is zero and route is timedout it will be invalidated. 256 * new_lifetime is in msec 257 */ 258int 259ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 260{ 261 int timesince, now; 262 uint32_t lifetime = 0; 263 264 KASSERT(rt != NULL, ("route is NULL")); 265 266 now = ticks; 267 RT_ENTRY_LOCK(rt); 268 269 /* dont clobber a proxy entry gated by us */ 270 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 271 RT_ENTRY_UNLOCK(rt); 272 return rt->rt_lifetime; 273 } 274 275 timesince = ticks_to_msecs(now - rt->rt_updtime); 276 rt->rt_updtime = now; 277 if (timesince >= rt->rt_lifetime) { 278 if (new_lifetime != 0) { 279 rt->rt_lifetime = new_lifetime; 280 } 281 else { 282 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 283 rt->rt_lifetime = 0; 284 } 285 } else { 286 /* update what is left of lifetime */ 287 rt->rt_lifetime = rt->rt_lifetime - timesince; 288 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 289 new_lifetime, rt->rt_lifetime); 290 } 291 lifetime = rt->rt_lifetime; 292 RT_ENTRY_UNLOCK(rt); 293 294 return lifetime; 295} 296 297/* 298 * Add a proxy route (as needed) for the specified destination. 299 */ 300void 301ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 302 const uint8_t dest[IEEE80211_ADDR_LEN]) 303{ 304 struct ieee80211_mesh_state *ms = vap->iv_mesh; 305 struct ieee80211_mesh_route *rt; 306 307 MESH_RT_LOCK(ms); 308 rt = mesh_rt_find_locked(ms, dest); 309 if (rt == NULL) { 310 rt = mesh_rt_add_locked(vap, dest); 311 if (rt == NULL) { 312 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 313 "%s", "unable to add proxy entry"); 314 vap->iv_stats.is_mesh_rtaddfailed++; 315 } else { 316 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 317 "%s", "add proxy entry"); 318 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 319 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 320 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 321 | IEEE80211_MESHRT_FLAGS_PROXY; 322 } 323 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 324 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 325 ("no proxy flag for poxy entry")); 326 struct ieee80211com *ic = vap->iv_ic; 327 /* 328 * Fix existing entry created by received frames from 329 * stations that have some memory of dest. We also 330 * flush any frames held on the staging queue; delivering 331 * them is too much trouble right now. 332 */ 333 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 334 "%s", "fix proxy entry"); 335 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 336 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 337 | IEEE80211_MESHRT_FLAGS_PROXY; 338 /* XXX belongs in hwmp */ 339 ieee80211_ageq_drain_node(&ic->ic_stageq, 340 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 341 /* XXX stat? */ 342 } 343 MESH_RT_UNLOCK(ms); 344} 345 346static __inline void 347mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 348{ 349 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 350 /* 351 * Grab the lock before destroying it, to be sure no one else 352 * is holding the route. 353 */ 354 RT_ENTRY_LOCK(rt); 355 callout_drain(&rt->rt_discovery); 356 mtx_destroy(&rt->rt_lock); 357 free(rt, M_80211_MESH_RT); 358} 359 360void 361ieee80211_mesh_rt_del(struct ieee80211vap *vap, 362 const uint8_t dest[IEEE80211_ADDR_LEN]) 363{ 364 struct ieee80211_mesh_state *ms = vap->iv_mesh; 365 struct ieee80211_mesh_route *rt, *next; 366 367 MESH_RT_LOCK(ms); 368 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 369 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 370 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 371 ms->ms_ppath->mpp_senderror(vap, dest, rt, 372 IEEE80211_REASON_MESH_PERR_NO_PROXY); 373 } else { 374 ms->ms_ppath->mpp_senderror(vap, dest, rt, 375 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 376 } 377 mesh_rt_del(ms, rt); 378 MESH_RT_UNLOCK(ms); 379 return; 380 } 381 } 382 MESH_RT_UNLOCK(ms); 383} 384 385void 386ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 387{ 388 struct ieee80211_mesh_state *ms = vap->iv_mesh; 389 struct ieee80211_mesh_route *rt, *next; 390 391 if (ms == NULL) 392 return; 393 MESH_RT_LOCK(ms); 394 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 395 mesh_rt_del(ms, rt); 396 MESH_RT_UNLOCK(ms); 397} 398 399void 400ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 401 const uint8_t peer[IEEE80211_ADDR_LEN]) 402{ 403 struct ieee80211_mesh_state *ms = vap->iv_mesh; 404 struct ieee80211_mesh_route *rt, *next; 405 406 MESH_RT_LOCK(ms); 407 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 408 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 409 mesh_rt_del(ms, rt); 410 } 411 MESH_RT_UNLOCK(ms); 412} 413 414/* 415 * Flush expired routing entries, i.e. those in invalid state for 416 * some time. 417 */ 418static void 419mesh_rt_flush_invalid(struct ieee80211vap *vap) 420{ 421 struct ieee80211_mesh_state *ms = vap->iv_mesh; 422 struct ieee80211_mesh_route *rt, *next; 423 424 if (ms == NULL) 425 return; 426 MESH_RT_LOCK(ms); 427 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 428 /* Discover paths will be deleted by their own callout */ 429 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 430 continue; 431 ieee80211_mesh_rt_update(rt, 0); 432 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 433 mesh_rt_del(ms, rt); 434 } 435 MESH_RT_UNLOCK(ms); 436} 437 438#define N(a) (sizeof(a) / sizeof(a[0])) 439int 440ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 441{ 442 int i, firstempty = -1; 443 444 for (i = 0; i < N(mesh_proto_paths); i++) { 445 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 446 IEEE80211_MESH_PROTO_DSZ) == 0) 447 return EEXIST; 448 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 449 firstempty = i; 450 } 451 if (firstempty < 0) 452 return ENOSPC; 453 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 454 mesh_proto_paths[firstempty].mpp_active = 1; 455 return 0; 456} 457 458int 459ieee80211_mesh_register_proto_metric(const struct 460 ieee80211_mesh_proto_metric *mpm) 461{ 462 int i, firstempty = -1; 463 464 for (i = 0; i < N(mesh_proto_metrics); i++) { 465 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 466 IEEE80211_MESH_PROTO_DSZ) == 0) 467 return EEXIST; 468 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 469 firstempty = i; 470 } 471 if (firstempty < 0) 472 return ENOSPC; 473 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 474 mesh_proto_metrics[firstempty].mpm_active = 1; 475 return 0; 476} 477 478static int 479mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 480{ 481 struct ieee80211_mesh_state *ms = vap->iv_mesh; 482 int i; 483 484 for (i = 0; i < N(mesh_proto_paths); i++) { 485 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 486 ms->ms_ppath = &mesh_proto_paths[i]; 487 return 0; 488 } 489 } 490 return ENOENT; 491} 492 493static int 494mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 495{ 496 struct ieee80211_mesh_state *ms = vap->iv_mesh; 497 int i; 498 499 for (i = 0; i < N(mesh_proto_metrics); i++) { 500 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 501 ms->ms_pmetric = &mesh_proto_metrics[i]; 502 return 0; 503 } 504 } 505 return ENOENT; 506} 507#undef N 508 509static void 510mesh_gatemode_setup(struct ieee80211vap *vap) 511{ 512 struct ieee80211_mesh_state *ms = vap->iv_mesh; 513 514 /* 515 * NB: When a mesh gate is running as a ROOT it shall 516 * not send out periodic GANNs but instead mark the 517 * mesh gate flag for the corresponding proactive PREQ 518 * and RANN frames. 519 */ 520 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 521 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 522 callout_drain(&ms->ms_gatetimer); 523 return ; 524 } 525 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 526 mesh_gatemode_cb, vap); 527} 528 529static void 530mesh_gatemode_cb(void *arg) 531{ 532 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 533 struct ieee80211_mesh_state *ms = vap->iv_mesh; 534 struct ieee80211_meshgann_ie gann; 535 536 gann.gann_flags = 0; /* Reserved */ 537 gann.gann_hopcount = 0; 538 gann.gann_ttl = ms->ms_ttl; 539 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 540 gann.gann_seq = ms->ms_gateseq++; 541 gann.gann_interval = ieee80211_mesh_gateint; 542 543 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 544 "send broadcast GANN (seq %u)", gann.gann_seq); 545 546 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 547 IEEE80211_ACTION_MESH_GANN, &gann); 548 mesh_gatemode_setup(vap); 549} 550 551static void 552ieee80211_mesh_init(void) 553{ 554 555 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 556 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 557 558 /* 559 * Setup mesh parameters that depends on the clock frequency. 560 */ 561 ieee80211_mesh_gateint = msecs_to_ticks(10000); 562 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 563 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 564 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 565 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 566 567 /* 568 * Register action frame handlers. 569 */ 570 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 571 IEEE80211_ACTION_MESHPEERING_OPEN, 572 mesh_recv_action_meshpeering_open); 573 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 574 IEEE80211_ACTION_MESHPEERING_CONFIRM, 575 mesh_recv_action_meshpeering_confirm); 576 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 577 IEEE80211_ACTION_MESHPEERING_CLOSE, 578 mesh_recv_action_meshpeering_close); 579 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 580 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 581 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 582 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 583 584 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 585 IEEE80211_ACTION_MESHPEERING_OPEN, 586 mesh_send_action_meshpeering_open); 587 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 588 IEEE80211_ACTION_MESHPEERING_CONFIRM, 589 mesh_send_action_meshpeering_confirm); 590 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 591 IEEE80211_ACTION_MESHPEERING_CLOSE, 592 mesh_send_action_meshpeering_close); 593 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 594 IEEE80211_ACTION_MESH_LMETRIC, 595 mesh_send_action_meshlmetric); 596 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 597 IEEE80211_ACTION_MESH_GANN, 598 mesh_send_action_meshgate); 599 600 /* 601 * Register Airtime Link Metric. 602 */ 603 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 604 605} 606SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 607 608void 609ieee80211_mesh_attach(struct ieee80211com *ic) 610{ 611 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 612} 613 614void 615ieee80211_mesh_detach(struct ieee80211com *ic) 616{ 617} 618 619static void 620mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 621{ 622 struct ieee80211com *ic = ni->ni_ic; 623 uint16_t args[3]; 624 625 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 626 args[0] = ni->ni_mlpid; 627 args[1] = ni->ni_mllid; 628 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 629 ieee80211_send_action(ni, 630 IEEE80211_ACTION_CAT_SELF_PROT, 631 IEEE80211_ACTION_MESHPEERING_CLOSE, 632 args); 633 } 634 callout_drain(&ni->ni_mltimer); 635 /* XXX belongs in hwmp */ 636 ieee80211_ageq_drain_node(&ic->ic_stageq, 637 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 638} 639 640static void 641mesh_vdetach(struct ieee80211vap *vap) 642{ 643 struct ieee80211_mesh_state *ms = vap->iv_mesh; 644 645 callout_drain(&ms->ms_cleantimer); 646 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 647 NULL); 648 ieee80211_mesh_rt_flush(vap); 649 mtx_destroy(&ms->ms_rt_lock); 650 ms->ms_ppath->mpp_vdetach(vap); 651 free(vap->iv_mesh, M_80211_VAP); 652 vap->iv_mesh = NULL; 653} 654 655static void 656mesh_vattach(struct ieee80211vap *vap) 657{ 658 struct ieee80211_mesh_state *ms; 659 vap->iv_newstate = mesh_newstate; 660 vap->iv_input = mesh_input; 661 vap->iv_opdetach = mesh_vdetach; 662 vap->iv_recv_mgmt = mesh_recv_mgmt; 663 vap->iv_recv_ctl = mesh_recv_ctl; 664 ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 665 M_NOWAIT | M_ZERO); 666 if (ms == NULL) { 667 printf("%s: couldn't alloc MBSS state\n", __func__); 668 return; 669 } 670 vap->iv_mesh = ms; 671 ms->ms_seq = 0; 672 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 673 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 674 TAILQ_INIT(&ms->ms_known_gates); 675 TAILQ_INIT(&ms->ms_routes); 676 mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF); 677 callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE); 678 callout_init(&ms->ms_gatetimer, CALLOUT_MPSAFE); 679 ms->ms_gateseq = 0; 680 mesh_select_proto_metric(vap, "AIRTIME"); 681 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 682 mesh_select_proto_path(vap, "HWMP"); 683 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 684 ms->ms_ppath->mpp_vattach(vap); 685} 686 687/* 688 * IEEE80211_M_MBSS vap state machine handler. 689 */ 690static int 691mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 692{ 693 struct ieee80211_mesh_state *ms = vap->iv_mesh; 694 struct ieee80211com *ic = vap->iv_ic; 695 struct ieee80211_node *ni; 696 enum ieee80211_state ostate; 697 698 IEEE80211_LOCK_ASSERT(ic); 699 700 ostate = vap->iv_state; 701 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 702 __func__, ieee80211_state_name[ostate], 703 ieee80211_state_name[nstate], arg); 704 vap->iv_state = nstate; /* state transition */ 705 if (ostate != IEEE80211_S_SCAN) 706 ieee80211_cancel_scan(vap); /* background scan */ 707 ni = vap->iv_bss; /* NB: no reference held */ 708 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 709 callout_drain(&ms->ms_cleantimer); 710 callout_drain(&ms->ms_gatetimer); 711 } 712 switch (nstate) { 713 case IEEE80211_S_INIT: 714 switch (ostate) { 715 case IEEE80211_S_SCAN: 716 ieee80211_cancel_scan(vap); 717 break; 718 case IEEE80211_S_CAC: 719 ieee80211_dfs_cac_stop(vap); 720 break; 721 case IEEE80211_S_RUN: 722 ieee80211_iterate_nodes(&ic->ic_sta, 723 mesh_vdetach_peers, NULL); 724 break; 725 default: 726 break; 727 } 728 if (ostate != IEEE80211_S_INIT) { 729 /* NB: optimize INIT -> INIT case */ 730 ieee80211_reset_bss(vap); 731 ieee80211_mesh_rt_flush(vap); 732 } 733 break; 734 case IEEE80211_S_SCAN: 735 switch (ostate) { 736 case IEEE80211_S_INIT: 737 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 738 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 739 ms->ms_idlen != 0) { 740 /* 741 * Already have a channel and a mesh ID; bypass 742 * the scan and startup immediately. 743 */ 744 ieee80211_create_ibss(vap, vap->iv_des_chan); 745 break; 746 } 747 /* 748 * Initiate a scan. We can come here as a result 749 * of an IEEE80211_IOC_SCAN_REQ too in which case 750 * the vap will be marked with IEEE80211_FEXT_SCANREQ 751 * and the scan request parameters will be present 752 * in iv_scanreq. Otherwise we do the default. 753 */ 754 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 755 ieee80211_check_scan(vap, 756 vap->iv_scanreq_flags, 757 vap->iv_scanreq_duration, 758 vap->iv_scanreq_mindwell, 759 vap->iv_scanreq_maxdwell, 760 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 761 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 762 } else 763 ieee80211_check_scan_current(vap); 764 break; 765 default: 766 break; 767 } 768 break; 769 case IEEE80211_S_CAC: 770 /* 771 * Start CAC on a DFS channel. We come here when starting 772 * a bss on a DFS channel (see ieee80211_create_ibss). 773 */ 774 ieee80211_dfs_cac_start(vap); 775 break; 776 case IEEE80211_S_RUN: 777 switch (ostate) { 778 case IEEE80211_S_INIT: 779 /* 780 * Already have a channel; bypass the 781 * scan and startup immediately. 782 * Note that ieee80211_create_ibss will call 783 * back to do a RUN->RUN state change. 784 */ 785 ieee80211_create_ibss(vap, 786 ieee80211_ht_adjust_channel(ic, 787 ic->ic_curchan, vap->iv_flags_ht)); 788 /* NB: iv_bss is changed on return */ 789 break; 790 case IEEE80211_S_CAC: 791 /* 792 * NB: This is the normal state change when CAC 793 * expires and no radar was detected; no need to 794 * clear the CAC timer as it's already expired. 795 */ 796 /* fall thru... */ 797 case IEEE80211_S_CSA: 798#if 0 799 /* 800 * Shorten inactivity timer of associated stations 801 * to weed out sta's that don't follow a CSA. 802 */ 803 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 804#endif 805 /* 806 * Update bss node channel to reflect where 807 * we landed after CSA. 808 */ 809 ieee80211_node_set_chan(vap->iv_bss, 810 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 811 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 812 /* XXX bypass debug msgs */ 813 break; 814 case IEEE80211_S_SCAN: 815 case IEEE80211_S_RUN: 816#ifdef IEEE80211_DEBUG 817 if (ieee80211_msg_debug(vap)) { 818 struct ieee80211_node *ni = vap->iv_bss; 819 ieee80211_note(vap, 820 "synchronized with %s meshid ", 821 ether_sprintf(ni->ni_meshid)); 822 ieee80211_print_essid(ni->ni_meshid, 823 ni->ni_meshidlen); 824 /* XXX MCS/HT */ 825 printf(" channel %d\n", 826 ieee80211_chan2ieee(ic, ic->ic_curchan)); 827 } 828#endif 829 break; 830 default: 831 break; 832 } 833 ieee80211_node_authorize(vap->iv_bss); 834 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 835 mesh_rt_cleanup_cb, vap); 836 mesh_gatemode_setup(vap); 837 break; 838 default: 839 break; 840 } 841 /* NB: ostate not nstate */ 842 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 843 return 0; 844} 845 846static void 847mesh_rt_cleanup_cb(void *arg) 848{ 849 struct ieee80211vap *vap = arg; 850 struct ieee80211_mesh_state *ms = vap->iv_mesh; 851 852 mesh_rt_flush_invalid(vap); 853 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 854 mesh_rt_cleanup_cb, vap); 855} 856 857/* 858 * Mark a mesh STA as gate and return a pointer to it. 859 * If this is first time, we create a new gate route. 860 * Always update the path route to this mesh gate. 861 */ 862struct ieee80211_mesh_gate_route * 863ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 864 struct ieee80211_mesh_route *rt) 865{ 866 struct ieee80211_mesh_state *ms = vap->iv_mesh; 867 struct ieee80211_mesh_gate_route *gr = NULL, *next; 868 int found = 0; 869 870 MESH_RT_LOCK(ms); 871 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 872 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 873 found = 1; 874 break; 875 } 876 } 877 878 if (!found) { 879 /* New mesh gate add it to known table. */ 880 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 881 "%s", "stored new gate information from pro-PREQ."); 882 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 883 M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO); 884 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 885 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 886 } 887 gr->gr_route = rt; 888 /* TODO: link from path route to gate route */ 889 MESH_RT_UNLOCK(ms); 890 891 return gr; 892} 893 894 895/* 896 * Helper function to note the Mesh Peer Link FSM change. 897 */ 898static void 899mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 900{ 901 struct ieee80211vap *vap = ni->ni_vap; 902 struct ieee80211_mesh_state *ms = vap->iv_mesh; 903#ifdef IEEE80211_DEBUG 904 static const char *meshlinkstates[] = { 905 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 906 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 907 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 908 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 909 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 910 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 911 }; 912#endif 913 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 914 ni, "peer link: %s -> %s", 915 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 916 917 /* track neighbor count */ 918 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 919 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 920 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 921 ms->ms_neighbors++; 922 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 923 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 924 state != IEEE80211_NODE_MESH_ESTABLISHED) { 925 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 926 ms->ms_neighbors--; 927 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 928 } 929 ni->ni_mlstate = state; 930 switch (state) { 931 case IEEE80211_NODE_MESH_HOLDING: 932 ms->ms_ppath->mpp_peerdown(ni); 933 break; 934 case IEEE80211_NODE_MESH_ESTABLISHED: 935 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 936 break; 937 default: 938 break; 939 } 940} 941 942/* 943 * Helper function to generate a unique local ID required for mesh 944 * peer establishment. 945 */ 946static void 947mesh_checkid(void *arg, struct ieee80211_node *ni) 948{ 949 uint16_t *r = arg; 950 951 if (*r == ni->ni_mllid) 952 *(uint16_t *)arg = 0; 953} 954 955static uint32_t 956mesh_generateid(struct ieee80211vap *vap) 957{ 958 int maxiter = 4; 959 uint16_t r; 960 961 do { 962 get_random_bytes(&r, 2); 963 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 964 maxiter--; 965 } while (r == 0 && maxiter > 0); 966 return r; 967} 968 969/* 970 * Verifies if we already received this packet by checking its 971 * sequence number. 972 * Returns 0 if the frame is to be accepted, 1 otherwise. 973 */ 974static int 975mesh_checkpseq(struct ieee80211vap *vap, 976 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 977{ 978 struct ieee80211_mesh_route *rt; 979 980 rt = ieee80211_mesh_rt_find(vap, source); 981 if (rt == NULL) { 982 rt = ieee80211_mesh_rt_add(vap, source); 983 if (rt == NULL) { 984 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 985 "%s", "add mcast route failed"); 986 vap->iv_stats.is_mesh_rtaddfailed++; 987 return 1; 988 } 989 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 990 "add mcast route, mesh seqno %d", seq); 991 rt->rt_lastmseq = seq; 992 return 0; 993 } 994 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 995 return 1; 996 } else { 997 rt->rt_lastmseq = seq; 998 return 0; 999 } 1000} 1001 1002/* 1003 * Iterate the routing table and locate the next hop. 1004 */ 1005struct ieee80211_node * 1006ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1007 const uint8_t dest[IEEE80211_ADDR_LEN]) 1008{ 1009 struct ieee80211_mesh_route *rt; 1010 1011 rt = ieee80211_mesh_rt_find(vap, dest); 1012 if (rt == NULL) 1013 return NULL; 1014 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1015 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1016 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1017 /* XXX stat */ 1018 return NULL; 1019 } 1020 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1021 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1022 if (rt == NULL) return NULL; 1023 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1024 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1025 "%s: meshgate !valid, flags 0x%x", __func__, 1026 rt->rt_flags); 1027 /* XXX stat */ 1028 return NULL; 1029 } 1030 } 1031 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1032} 1033 1034static void 1035mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1036 struct ieee80211_mesh_route *rt_gate) 1037{ 1038 struct ifnet *ifp = vap->iv_ifp; 1039 struct ieee80211com *ic = vap->iv_ic; 1040 struct ifnet *parent = ic->ic_ifp; 1041 struct ieee80211_node *ni; 1042 struct ether_header *eh; 1043 int error; 1044 1045 eh = mtod(m, struct ether_header *); 1046 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1047 if (ni == NULL) { 1048 ifp->if_oerrors++; 1049 m_freem(m); 1050 return; 1051 } 1052 1053 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 1054 (m->m_flags & M_PWR_SAV) == 0) { 1055 /* 1056 * Station in power save mode; pass the frame 1057 * to the 802.11 layer and continue. We'll get 1058 * the frame back when the time is right. 1059 * XXX lose WDS vap linkage? 1060 */ 1061 (void) ieee80211_pwrsave(ni, m); 1062 ieee80211_free_node(ni); 1063 return; 1064 } 1065 1066 /* calculate priority so drivers can find the tx queue */ 1067 if (ieee80211_classify(ni, m)) { 1068 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 1069 eh->ether_dhost, NULL, 1070 "%s", "classification failure"); 1071 vap->iv_stats.is_tx_classify++; 1072 ifp->if_oerrors++; 1073 m_freem(m); 1074 ieee80211_free_node(ni); 1075 return; 1076 } 1077 /* 1078 * Stash the node pointer. Note that we do this after 1079 * any call to ieee80211_dwds_mcast because that code 1080 * uses any existing value for rcvif to identify the 1081 * interface it (might have been) received on. 1082 */ 1083 m->m_pkthdr.rcvif = (void *)ni; 1084 1085 BPF_MTAP(ifp, m); /* 802.3 tx */ 1086 1087 /* 1088 * Check if A-MPDU tx aggregation is setup or if we 1089 * should try to enable it. The sta must be associated 1090 * with HT and A-MPDU enabled for use. When the policy 1091 * routine decides we should enable A-MPDU we issue an 1092 * ADDBA request and wait for a reply. The frame being 1093 * encapsulated will go out w/o using A-MPDU, or possibly 1094 * it might be collected by the driver and held/retransmit. 1095 * The default ic_ampdu_enable routine handles staggering 1096 * ADDBA requests in case the receiver NAK's us or we are 1097 * otherwise unable to establish a BA stream. 1098 */ 1099 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) && 1100 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX) && 1101 (m->m_flags & M_EAPOL) == 0) { 1102 int tid = WME_AC_TO_TID(M_WME_GETAC(m)); 1103 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid]; 1104 1105 ieee80211_txampdu_count_packet(tap); 1106 if (IEEE80211_AMPDU_RUNNING(tap)) { 1107 /* 1108 * Operational, mark frame for aggregation. 1109 * 1110 * XXX do tx aggregation here 1111 */ 1112 m->m_flags |= M_AMPDU_MPDU; 1113 } else if (!IEEE80211_AMPDU_REQUESTED(tap) && 1114 ic->ic_ampdu_enable(ni, tap)) { 1115 /* 1116 * Not negotiated yet, request service. 1117 */ 1118 ieee80211_ampdu_request(ni, tap); 1119 /* XXX hold frame for reply? */ 1120 } 1121 } 1122#ifdef IEEE80211_SUPPORT_SUPERG 1123 else if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF)) { 1124 m = ieee80211_ff_check(ni, m); 1125 if (m == NULL) { 1126 /* NB: any ni ref held on stageq */ 1127 return; 1128 } 1129 } 1130#endif /* IEEE80211_SUPPORT_SUPERG */ 1131 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 1132 /* 1133 * Encapsulate the packet in prep for transmission. 1134 */ 1135 m = ieee80211_encap(vap, ni, m); 1136 if (m == NULL) { 1137 /* NB: stat+msg handled in ieee80211_encap */ 1138 ieee80211_free_node(ni); 1139 return; 1140 } 1141 } 1142 error = parent->if_transmit(parent, m); 1143 if (error != 0) { 1144 m_freem(m); 1145 ieee80211_free_node(ni); 1146 } else { 1147 ifp->if_opackets++; 1148 } 1149 ic->ic_lastdata = ticks; 1150} 1151 1152/* 1153 * Forward the queued frames to known valid mesh gates. 1154 * Assume destination to be outside the MBSS (i.e. proxy entry), 1155 * If no valid mesh gates are known silently discard queued frames. 1156 * After transmitting frames to all known valid mesh gates, this route 1157 * will be marked invalid, and a new path discovery will happen in the hopes 1158 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1159 */ 1160void 1161ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1162 struct ieee80211_mesh_route *rt_dest) 1163{ 1164 struct ieee80211com *ic = vap->iv_ic; 1165 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1166 struct ieee80211_mesh_route *rt_gate; 1167 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1168 struct mbuf *m, *mcopy, *next; 1169 1170 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1171 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1172 1173 /* XXX: send to more than one valid mash gate */ 1174 MESH_RT_LOCK(ms); 1175 1176 m = ieee80211_ageq_remove(&ic->ic_stageq, 1177 (struct ieee80211_node *)(uintptr_t) 1178 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1179 1180 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1181 rt_gate = gr->gr_route; 1182 if (rt_gate == NULL) { 1183 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1184 rt_dest->rt_dest, 1185 "mesh gate with no path %6D", 1186 gr->gr_addr, ":"); 1187 continue; 1188 } 1189 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1190 continue; 1191 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1192 ("route not marked as a mesh gate")); 1193 KASSERT((rt_gate->rt_flags & 1194 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1195 ("found mesh gate that is also marked porxy")); 1196 /* 1197 * convert route to a proxy route gated by the current 1198 * mesh gate, this is needed so encap can built data 1199 * frame with correct address. 1200 */ 1201 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1202 IEEE80211_MESHRT_FLAGS_VALID; 1203 rt_dest->rt_ext_seq = 1; /* random value */ 1204 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1205 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1206 rt_dest->rt_metric = rt_gate->rt_metric; 1207 rt_dest->rt_nhops = rt_gate->rt_nhops; 1208 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1209 MESH_RT_UNLOCK(ms); 1210 /* XXX: lock?? */ 1211 mcopy = m_dup(m, M_NOWAIT); 1212 for (; mcopy != NULL; mcopy = next) { 1213 next = mcopy->m_nextpkt; 1214 mcopy->m_nextpkt = NULL; 1215 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1216 rt_dest->rt_dest, 1217 "flush queued frame %p len %d", mcopy, 1218 mcopy->m_pkthdr.len); 1219 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1220 } 1221 MESH_RT_LOCK(ms); 1222 } 1223 rt_dest->rt_flags = 0; /* Mark invalid */ 1224 m_freem(m); 1225 MESH_RT_UNLOCK(ms); 1226} 1227 1228/* 1229 * Forward the specified frame. 1230 * Decrement the TTL and set TA to our MAC address. 1231 */ 1232static void 1233mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1234 const struct ieee80211_meshcntl *mc) 1235{ 1236 struct ieee80211com *ic = vap->iv_ic; 1237 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1238 struct ifnet *ifp = vap->iv_ifp; 1239 struct ifnet *parent = ic->ic_ifp; 1240 const struct ieee80211_frame *wh = 1241 mtod(m, const struct ieee80211_frame *); 1242 struct mbuf *mcopy; 1243 struct ieee80211_meshcntl *mccopy; 1244 struct ieee80211_frame *whcopy; 1245 struct ieee80211_node *ni; 1246 int err; 1247 1248 /* 1249 * mesh ttl of 1 means we are the last one receving it, 1250 * according to amendment we decrement and then check if 1251 * 0, if so we dont forward. 1252 */ 1253 if (mc->mc_ttl < 1) { 1254 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1255 "%s", "frame not fwd'd, ttl 1"); 1256 vap->iv_stats.is_mesh_fwd_ttl++; 1257 return; 1258 } 1259 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1260 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1261 "%s", "frame not fwd'd, fwding disabled"); 1262 vap->iv_stats.is_mesh_fwd_disabled++; 1263 return; 1264 } 1265 mcopy = m_dup(m, M_NOWAIT); 1266 if (mcopy == NULL) { 1267 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1268 "%s", "frame not fwd'd, cannot dup"); 1269 vap->iv_stats.is_mesh_fwd_nobuf++; 1270 ifp->if_oerrors++; 1271 return; 1272 } 1273 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1274 sizeof(struct ieee80211_meshcntl)); 1275 if (mcopy == NULL) { 1276 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1277 "%s", "frame not fwd'd, too short"); 1278 vap->iv_stats.is_mesh_fwd_tooshort++; 1279 ifp->if_oerrors++; 1280 m_freem(mcopy); 1281 return; 1282 } 1283 whcopy = mtod(mcopy, struct ieee80211_frame *); 1284 mccopy = (struct ieee80211_meshcntl *) 1285 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1286 /* XXX clear other bits? */ 1287 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1288 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1289 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1290 ni = ieee80211_ref_node(vap->iv_bss); 1291 mcopy->m_flags |= M_MCAST; 1292 } else { 1293 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1294 if (ni == NULL) { 1295 /* 1296 * [Optional] any of the following three actions: 1297 * o silently discard 1298 * o trigger a path discovery 1299 * o inform TA that meshDA is unknown. 1300 */ 1301 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1302 "%s", "frame not fwd'd, no path"); 1303 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1304 IEEE80211_REASON_MESH_PERR_NO_FI); 1305 vap->iv_stats.is_mesh_fwd_nopath++; 1306 m_freem(mcopy); 1307 return; 1308 } 1309 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1310 } 1311 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1312 mccopy->mc_ttl--; 1313 1314 /* XXX calculate priority so drivers can find the tx queue */ 1315 M_WME_SETAC(mcopy, WME_AC_BE); 1316 1317 /* XXX do we know m_nextpkt is NULL? */ 1318 mcopy->m_pkthdr.rcvif = (void *) ni; 1319 err = parent->if_transmit(parent, mcopy); 1320 if (err != 0) { 1321 /* NB: IFQ_HANDOFF reclaims mbuf */ 1322 ieee80211_free_node(ni); 1323 } else { 1324 ifp->if_opackets++; 1325 } 1326} 1327 1328static struct mbuf * 1329mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1330{ 1331#define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1332#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1333 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1334 sizeof(struct ieee80211_meshcntl_ae10)]; 1335 const struct ieee80211_qosframe_addr4 *wh; 1336 const struct ieee80211_meshcntl_ae10 *mc; 1337 struct ether_header *eh; 1338 struct llc *llc; 1339 int ae; 1340 1341 if (m->m_len < hdrlen + sizeof(*llc) && 1342 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1343 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1344 "discard data frame: %s", "m_pullup failed"); 1345 vap->iv_stats.is_rx_tooshort++; 1346 return NULL; 1347 } 1348 memcpy(b, mtod(m, caddr_t), hdrlen); 1349 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1350 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1351 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1352 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1353 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1354 1355 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1356 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1357 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1358 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1359 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1360 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1361 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1362 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1363 llc = NULL; 1364 } else { 1365 m_adj(m, hdrlen - sizeof(*eh)); 1366 } 1367 eh = mtod(m, struct ether_header *); 1368 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1369 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1370 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1371 if (ae == IEEE80211_MESH_AE_00) { 1372 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1373 } else if (ae == IEEE80211_MESH_AE_01) { 1374 IEEE80211_ADDR_COPY(eh->ether_shost, 1375 MC01(mc)->mc_addr4); 1376 } else { 1377 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1378 (const struct ieee80211_frame *)wh, NULL, 1379 "bad AE %d", ae); 1380 vap->iv_stats.is_mesh_badae++; 1381 m_freem(m); 1382 return NULL; 1383 } 1384 } else { 1385 if (ae == IEEE80211_MESH_AE_00) { 1386 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1387 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1388 } else if (ae == IEEE80211_MESH_AE_10) { 1389 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1390 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1391 } else { 1392 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1393 (const struct ieee80211_frame *)wh, NULL, 1394 "bad AE %d", ae); 1395 vap->iv_stats.is_mesh_badae++; 1396 m_freem(m); 1397 return NULL; 1398 } 1399 } 1400#ifdef ALIGNED_POINTER 1401 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1402 m = ieee80211_realign(vap, m, sizeof(*eh)); 1403 if (m == NULL) 1404 return NULL; 1405 } 1406#endif /* ALIGNED_POINTER */ 1407 if (llc != NULL) { 1408 eh = mtod(m, struct ether_header *); 1409 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1410 } 1411 return m; 1412#undef WDIR 1413#undef MC01 1414} 1415 1416/* 1417 * Return non-zero if the unicast mesh data frame should be processed 1418 * locally. Frames that are not proxy'd have our address, otherwise 1419 * we need to consult the routing table to look for a proxy entry. 1420 */ 1421static __inline int 1422mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1423 const struct ieee80211_meshcntl *mc) 1424{ 1425 int ae = mc->mc_flags & 3; 1426 1427 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1428 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1429 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1430 ("bad AE %d", ae)); 1431 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1432 const struct ieee80211_meshcntl_ae10 *mc10 = 1433 (const struct ieee80211_meshcntl_ae10 *) mc; 1434 struct ieee80211_mesh_route *rt = 1435 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1436 /* check for proxy route to ourself */ 1437 return (rt != NULL && 1438 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1439 } else /* ucast w/o proxy */ 1440 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1441} 1442 1443/* 1444 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1445 * > 0 means we have forwarded data and no need to process locally 1446 * == 0 means we want to process locally (and we may have forwarded data 1447 * < 0 means there was an error and data should be discarded 1448 */ 1449static int 1450mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1451 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1452{ 1453 struct ieee80211_qosframe_addr4 *qwh; 1454 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1455 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1456 1457 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1458 1459 /* 1460 * TODO: 1461 * o verify addr2 is a legitimate transmitter 1462 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1463 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1464 */ 1465 1466 /* set lifetime of addr3 (meshDA) to initial value */ 1467 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1468 if (rt_meshda == NULL) { 1469 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1470 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1471 /* 1472 * [Optional] any of the following three actions: 1473 * o silently discard [X] 1474 * o trigger a path discovery [ ] 1475 * o inform TA that meshDA is unknown. [ ] 1476 */ 1477 /* XXX: stats */ 1478 return (-1); 1479 } 1480 1481 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1482 ms->ms_ppath->mpp_inact)); 1483 1484 /* set lifetime of addr4 (meshSA) to initial value */ 1485 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1486 KASSERT(rt_meshsa != NULL, ("no route")); 1487 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1488 ms->ms_ppath->mpp_inact)); 1489 1490 mesh_forward(vap, m, mc); 1491 return (1); /* dont process locally */ 1492} 1493 1494/* 1495 * Verifies transmitter, updates lifetime, precursor list and process data 1496 * locally, if data is proxy with AE = 10 it could mean data should go 1497 * on another mesh path or data should be forwarded 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_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1505 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1506{ 1507 struct ieee80211_qosframe_addr4 *qwh; 1508 const struct ieee80211_meshcntl_ae10 *mc10; 1509 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1510 struct ieee80211_mesh_route *rt; 1511 int ae; 1512 1513 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1514 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1515 1516 /* 1517 * TODO: 1518 * o verify addr2 is a legitimate transmitter 1519 * o lifetime of precursor entry is max(init, curr) 1520 */ 1521 1522 /* set lifetime of addr4 (meshSA) to initial value */ 1523 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1524 KASSERT(rt != NULL, ("no route")); 1525 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1526 rt = NULL; 1527 1528 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1529 KASSERT(ae == IEEE80211_MESH_AE_00 || 1530 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1531 if (ae == IEEE80211_MESH_AE_10) { 1532 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1533 return (0); /* process locally */ 1534 } 1535 1536 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1537 if (rt != NULL && 1538 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1539 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1540 /* 1541 * Forward on another mesh-path, according to 1542 * amendment as specified in 9.32.4.1 1543 */ 1544 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1545 mesh_forward(vap, m, 1546 (const struct ieee80211_meshcntl *)mc10); 1547 return (1); /* dont process locally */ 1548 } 1549 /* 1550 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1551 * addressed according to 13.11.3.2. 1552 */ 1553 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1554 "forward frame to DS, SA(%6D) DA(%6D)", 1555 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1556 } 1557 return (0); /* process locally */ 1558} 1559 1560/* 1561 * Try to forward the group addressed data on to other mesh STAs, and 1562 * also to the DS. 1563 * 1564 * > 0 means we have forwarded data and no need to process locally 1565 * == 0 means we want to process locally (and we may have forwarded data 1566 * < 0 means there was an error and data should be discarded 1567 */ 1568static int 1569mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1570 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1571{ 1572#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1573 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1574 1575 mesh_forward(vap, m, mc); 1576 1577 if(mc->mc_ttl > 0) { 1578 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1579 /* 1580 * Forward of MSDUs from the MBSS to DS group addressed 1581 * (according to 13.11.3.2) 1582 * This happens by delivering the packet, and a bridge 1583 * will sent it on another port member. 1584 */ 1585 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1586 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1587 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1588 MC01(mc)->mc_addr4, "%s", 1589 "forward from MBSS to the DS"); 1590 } 1591 } 1592 return (0); /* process locally */ 1593#undef MC01 1594} 1595 1596static int 1597mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 1598{ 1599#define HAS_SEQ(type) ((type & 0x4) == 0) 1600#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1601#define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1602 struct ieee80211vap *vap = ni->ni_vap; 1603 struct ieee80211com *ic = ni->ni_ic; 1604 struct ifnet *ifp = vap->iv_ifp; 1605 struct ieee80211_frame *wh; 1606 const struct ieee80211_meshcntl *mc; 1607 int hdrspace, meshdrlen, need_tap, error; 1608 uint8_t dir, type, subtype, ae; 1609 uint32_t seq; 1610 const uint8_t *addr; 1611 uint8_t qos[2]; 1612 ieee80211_seq rxseq; 1613 1614 KASSERT(ni != NULL, ("null node")); 1615 ni->ni_inact = ni->ni_inact_reload; 1616 1617 need_tap = 1; /* mbuf need to be tapped. */ 1618 type = -1; /* undefined */ 1619 1620 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1621 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1622 ni->ni_macaddr, NULL, 1623 "too short (1): len %u", m->m_pkthdr.len); 1624 vap->iv_stats.is_rx_tooshort++; 1625 goto out; 1626 } 1627 /* 1628 * Bit of a cheat here, we use a pointer for a 3-address 1629 * frame format but don't reference fields past outside 1630 * ieee80211_frame_min w/o first validating the data is 1631 * present. 1632 */ 1633 wh = mtod(m, struct ieee80211_frame *); 1634 1635 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1636 IEEE80211_FC0_VERSION_0) { 1637 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1638 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1639 vap->iv_stats.is_rx_badversion++; 1640 goto err; 1641 } 1642 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1643 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1644 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1645 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1646 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1647 ni->ni_noise = nf; 1648 if (HAS_SEQ(type)) { 1649 uint8_t tid = ieee80211_gettid(wh); 1650 1651 if (IEEE80211_QOS_HAS_SEQ(wh) && 1652 TID_TO_WME_AC(tid) >= WME_AC_VI) 1653 ic->ic_wme.wme_hipri_traffic++; 1654 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1655 if (! ieee80211_check_rxseq(ni, wh)) { 1656 /* duplicate, discard */ 1657 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1658 wh->i_addr1, "duplicate", 1659 "seqno <%u,%u> fragno <%u,%u> tid %u", 1660 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1661 ni->ni_rxseqs[tid] >> 1662 IEEE80211_SEQ_SEQ_SHIFT, 1663 rxseq & IEEE80211_SEQ_FRAG_MASK, 1664 ni->ni_rxseqs[tid] & 1665 IEEE80211_SEQ_FRAG_MASK, 1666 tid); 1667 vap->iv_stats.is_rx_dup++; 1668 IEEE80211_NODE_STAT(ni, rx_dup); 1669 goto out; 1670 } 1671 ni->ni_rxseqs[tid] = rxseq; 1672 } 1673 } 1674#ifdef IEEE80211_DEBUG 1675 /* 1676 * It's easier, but too expensive, to simulate different mesh 1677 * topologies by consulting the ACL policy very early, so do this 1678 * only under DEBUG. 1679 * 1680 * NB: this check is also done upon peering link initiation. 1681 */ 1682 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1683 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1684 wh, NULL, "%s", "disallowed by ACL"); 1685 vap->iv_stats.is_rx_acl++; 1686 goto out; 1687 } 1688#endif 1689 switch (type) { 1690 case IEEE80211_FC0_TYPE_DATA: 1691 if (ni == vap->iv_bss) 1692 goto out; 1693 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1694 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1695 ni->ni_macaddr, NULL, 1696 "peer link not yet established (%d)", 1697 ni->ni_mlstate); 1698 vap->iv_stats.is_mesh_nolink++; 1699 goto out; 1700 } 1701 if (dir != IEEE80211_FC1_DIR_FROMDS && 1702 dir != IEEE80211_FC1_DIR_DSTODS) { 1703 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1704 wh, "data", "incorrect dir 0x%x", dir); 1705 vap->iv_stats.is_rx_wrongdir++; 1706 goto err; 1707 } 1708 1709 /* All Mesh data frames are QoS subtype */ 1710 if (!HAS_SEQ(type)) { 1711 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1712 wh, "data", "incorrect subtype 0x%x", subtype); 1713 vap->iv_stats.is_rx_badsubtype++; 1714 goto err; 1715 } 1716 1717 /* 1718 * Next up, any fragmentation. 1719 * XXX: we defrag before we even try to forward, 1720 * Mesh Control field is not present in sub-sequent 1721 * fragmented frames. This is in contrast to Draft 4.0. 1722 */ 1723 hdrspace = ieee80211_hdrspace(ic, wh); 1724 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1725 m = ieee80211_defrag(ni, m, hdrspace); 1726 if (m == NULL) { 1727 /* Fragment dropped or frame not complete yet */ 1728 goto out; 1729 } 1730 } 1731 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1732 1733 /* 1734 * Now we have a complete Mesh Data frame. 1735 */ 1736 1737 /* 1738 * Only fromDStoDS data frames use 4 address qos frames 1739 * as specified in amendment. Otherwise addr4 is located 1740 * in the Mesh Control field and a 3 address qos frame 1741 * is used. 1742 */ 1743 if (IEEE80211_IS_DSTODS(wh)) 1744 *(uint16_t *)qos = *(uint16_t *) 1745 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1746 else 1747 *(uint16_t *)qos = *(uint16_t *) 1748 ((struct ieee80211_qosframe *)wh)->i_qos; 1749 1750 /* 1751 * NB: The mesh STA sets the Mesh Control Present 1752 * subfield to 1 in the Mesh Data frame containing 1753 * an unfragmented MSDU, an A-MSDU, or the first 1754 * fragment of an MSDU. 1755 * After defrag it should always be present. 1756 */ 1757 if (!(qos[1] & IEEE80211_QOS_MC)) { 1758 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1759 ni->ni_macaddr, NULL, 1760 "%s", "Mesh control field not present"); 1761 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1762 goto err; 1763 } 1764 1765 /* pull up enough to get to the mesh control */ 1766 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1767 (m = m_pullup(m, hdrspace + 1768 sizeof(struct ieee80211_meshcntl))) == NULL) { 1769 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1770 ni->ni_macaddr, NULL, 1771 "data too short: expecting %u", hdrspace); 1772 vap->iv_stats.is_rx_tooshort++; 1773 goto out; /* XXX */ 1774 } 1775 /* 1776 * Now calculate the full extent of the headers. Note 1777 * mesh_decap will pull up anything we didn't get 1778 * above when it strips the 802.11 headers. 1779 */ 1780 mc = (const struct ieee80211_meshcntl *) 1781 (mtod(m, const uint8_t *) + hdrspace); 1782 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1783 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1784 ae * IEEE80211_ADDR_LEN; 1785 hdrspace += meshdrlen; 1786 1787 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1788 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1789 (m->m_len < hdrspace) && 1790 ((m = m_pullup(m, hdrspace)) == NULL)) { 1791 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1792 ni->ni_macaddr, NULL, 1793 "data too short: expecting %u", hdrspace); 1794 vap->iv_stats.is_rx_tooshort++; 1795 goto out; /* XXX */ 1796 } 1797 /* XXX: are we sure there is no reallocating after m_pullup? */ 1798 1799 seq = LE_READ_4(mc->mc_seq); 1800 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1801 addr = wh->i_addr3; 1802 else if (ae == IEEE80211_MESH_AE_01) 1803 addr = MC01(mc)->mc_addr4; 1804 else 1805 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1806 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1807 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1808 addr, "data", "%s", "not to me"); 1809 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1810 goto out; 1811 } 1812 if (mesh_checkpseq(vap, addr, seq) != 0) { 1813 vap->iv_stats.is_rx_dup++; 1814 goto out; 1815 } 1816 1817 /* This code "routes" the frame to the right control path */ 1818 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1819 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1820 error = 1821 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1822 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1823 error = mesh_recv_group_data(vap, m, wh, mc); 1824 else 1825 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1826 wh, mc); 1827 } else 1828 error = mesh_recv_group_data(vap, m, wh, mc); 1829 if (error < 0) 1830 goto err; 1831 else if (error > 0) 1832 goto out; 1833 1834 if (ieee80211_radiotap_active_vap(vap)) 1835 ieee80211_radiotap_rx(vap, m); 1836 need_tap = 0; 1837 1838 /* 1839 * Finally, strip the 802.11 header. 1840 */ 1841 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1842 if (m == NULL) { 1843 /* XXX mask bit to check for both */ 1844 /* don't count Null data frames as errors */ 1845 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1846 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1847 goto out; 1848 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1849 ni->ni_macaddr, "data", "%s", "decap error"); 1850 vap->iv_stats.is_rx_decap++; 1851 IEEE80211_NODE_STAT(ni, rx_decap); 1852 goto err; 1853 } 1854 if (qos[0] & IEEE80211_QOS_AMSDU) { 1855 m = ieee80211_decap_amsdu(ni, m); 1856 if (m == NULL) 1857 return IEEE80211_FC0_TYPE_DATA; 1858 } 1859 ieee80211_deliver_data(vap, ni, m); 1860 return type; 1861 case IEEE80211_FC0_TYPE_MGT: 1862 vap->iv_stats.is_rx_mgmt++; 1863 IEEE80211_NODE_STAT(ni, rx_mgmt); 1864 if (dir != IEEE80211_FC1_DIR_NODS) { 1865 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1866 wh, "mgt", "incorrect dir 0x%x", dir); 1867 vap->iv_stats.is_rx_wrongdir++; 1868 goto err; 1869 } 1870 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1871 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1872 ni->ni_macaddr, "mgt", "too short: len %u", 1873 m->m_pkthdr.len); 1874 vap->iv_stats.is_rx_tooshort++; 1875 goto out; 1876 } 1877#ifdef IEEE80211_DEBUG 1878 if ((ieee80211_msg_debug(vap) && 1879 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1880 ieee80211_msg_dumppkts(vap)) { 1881 if_printf(ifp, "received %s from %s rssi %d\n", 1882 ieee80211_mgt_subtype_name[subtype >> 1883 IEEE80211_FC0_SUBTYPE_SHIFT], 1884 ether_sprintf(wh->i_addr2), rssi); 1885 } 1886#endif 1887 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1888 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1889 wh, NULL, "%s", "WEP set but not permitted"); 1890 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1891 goto out; 1892 } 1893 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1894 goto out; 1895 case IEEE80211_FC0_TYPE_CTL: 1896 vap->iv_stats.is_rx_ctl++; 1897 IEEE80211_NODE_STAT(ni, rx_ctrl); 1898 goto out; 1899 default: 1900 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1901 wh, "bad", "frame type 0x%x", type); 1902 /* should not come here */ 1903 break; 1904 } 1905err: 1906 ifp->if_ierrors++; 1907out: 1908 if (m != NULL) { 1909 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1910 ieee80211_radiotap_rx(vap, m); 1911 m_freem(m); 1912 } 1913 return type; 1914#undef HAS_SEQ 1915#undef MC01 1916#undef MC10 1917} 1918 1919static void 1920mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1921 int rssi, int nf) 1922{ 1923 struct ieee80211vap *vap = ni->ni_vap; 1924 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1925 struct ieee80211com *ic = ni->ni_ic; 1926 struct ieee80211_frame *wh; 1927 struct ieee80211_mesh_route *rt; 1928 uint8_t *frm, *efrm; 1929 1930 wh = mtod(m0, struct ieee80211_frame *); 1931 frm = (uint8_t *)&wh[1]; 1932 efrm = mtod(m0, uint8_t *) + m0->m_len; 1933 switch (subtype) { 1934 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1935 case IEEE80211_FC0_SUBTYPE_BEACON: 1936 { 1937 struct ieee80211_scanparams scan; 1938 /* 1939 * We process beacon/probe response 1940 * frames to discover neighbors. 1941 */ 1942 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1943 return; 1944 /* 1945 * Count frame now that we know it's to be processed. 1946 */ 1947 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1948 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1949 IEEE80211_NODE_STAT(ni, rx_beacons); 1950 } else 1951 IEEE80211_NODE_STAT(ni, rx_proberesp); 1952 /* 1953 * If scanning, just pass information to the scan module. 1954 */ 1955 if (ic->ic_flags & IEEE80211_F_SCAN) { 1956 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1957 /* 1958 * Actively scanning a channel marked passive; 1959 * send a probe request now that we know there 1960 * is 802.11 traffic present. 1961 * 1962 * XXX check if the beacon we recv'd gives 1963 * us what we need and suppress the probe req 1964 */ 1965 ieee80211_probe_curchan(vap, 1); 1966 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1967 } 1968 ieee80211_add_scan(vap, &scan, wh, 1969 subtype, rssi, nf); 1970 return; 1971 } 1972 1973 /* The rest of this code assumes we are running */ 1974 if (vap->iv_state != IEEE80211_S_RUN) 1975 return; 1976 /* 1977 * Ignore non-mesh STAs. 1978 */ 1979 if ((scan.capinfo & 1980 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1981 scan.meshid == NULL || scan.meshconf == NULL) { 1982 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1983 wh, "beacon", "%s", "not a mesh sta"); 1984 vap->iv_stats.is_mesh_wrongmesh++; 1985 return; 1986 } 1987 /* 1988 * Ignore STAs for other mesh networks. 1989 */ 1990 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1991 mesh_verify_meshconf(vap, scan.meshconf)) { 1992 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1993 wh, "beacon", "%s", "not for our mesh"); 1994 vap->iv_stats.is_mesh_wrongmesh++; 1995 return; 1996 } 1997 /* 1998 * Peer only based on the current ACL policy. 1999 */ 2000 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 2001 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 2002 wh, NULL, "%s", "disallowed by ACL"); 2003 vap->iv_stats.is_rx_acl++; 2004 return; 2005 } 2006 /* 2007 * Do neighbor discovery. 2008 */ 2009 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 2010 /* 2011 * Create a new entry in the neighbor table. 2012 */ 2013 ni = ieee80211_add_neighbor(vap, wh, &scan); 2014 } 2015 /* 2016 * Automatically peer with discovered nodes if possible. 2017 */ 2018 if (ni != vap->iv_bss && 2019 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 2020 switch (ni->ni_mlstate) { 2021 case IEEE80211_NODE_MESH_IDLE: 2022 { 2023 uint16_t args[1]; 2024 2025 /* Wait for backoff callout to reset counter */ 2026 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 2027 return; 2028 2029 ni->ni_mlpid = mesh_generateid(vap); 2030 if (ni->ni_mlpid == 0) 2031 return; 2032 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 2033 args[0] = ni->ni_mlpid; 2034 ieee80211_send_action(ni, 2035 IEEE80211_ACTION_CAT_SELF_PROT, 2036 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2037 ni->ni_mlrcnt = 0; 2038 mesh_peer_timeout_setup(ni); 2039 break; 2040 } 2041 case IEEE80211_NODE_MESH_ESTABLISHED: 2042 { 2043 /* 2044 * Valid beacon from a peer mesh STA 2045 * bump TA lifetime 2046 */ 2047 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 2048 if(rt != NULL) { 2049 ieee80211_mesh_rt_update(rt, 2050 ticks_to_msecs( 2051 ms->ms_ppath->mpp_inact)); 2052 } 2053 break; 2054 } 2055 default: 2056 break; /* ignore */ 2057 } 2058 } 2059 break; 2060 } 2061 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2062 { 2063 uint8_t *ssid, *meshid, *rates, *xrates; 2064 uint8_t *sfrm; 2065 2066 if (vap->iv_state != IEEE80211_S_RUN) { 2067 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2068 wh, NULL, "wrong state %s", 2069 ieee80211_state_name[vap->iv_state]); 2070 vap->iv_stats.is_rx_mgtdiscard++; 2071 return; 2072 } 2073 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 2074 /* frame must be directed */ 2075 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2076 wh, NULL, "%s", "not unicast"); 2077 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 2078 return; 2079 } 2080 /* 2081 * prreq frame format 2082 * [tlv] ssid 2083 * [tlv] supported rates 2084 * [tlv] extended supported rates 2085 * [tlv] mesh id 2086 */ 2087 ssid = meshid = rates = xrates = NULL; 2088 sfrm = frm; 2089 while (efrm - frm > 1) { 2090 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2091 switch (*frm) { 2092 case IEEE80211_ELEMID_SSID: 2093 ssid = frm; 2094 break; 2095 case IEEE80211_ELEMID_RATES: 2096 rates = frm; 2097 break; 2098 case IEEE80211_ELEMID_XRATES: 2099 xrates = frm; 2100 break; 2101 case IEEE80211_ELEMID_MESHID: 2102 meshid = frm; 2103 break; 2104 } 2105 frm += frm[1] + 2; 2106 } 2107 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2108 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2109 if (xrates != NULL) 2110 IEEE80211_VERIFY_ELEMENT(xrates, 2111 IEEE80211_RATE_MAXSIZE - rates[1], return); 2112 if (meshid != NULL) { 2113 IEEE80211_VERIFY_ELEMENT(meshid, 2114 IEEE80211_MESHID_LEN, return); 2115 /* NB: meshid, not ssid */ 2116 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2117 } 2118 2119 /* XXX find a better class or define it's own */ 2120 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2121 "%s", "recv probe req"); 2122 /* 2123 * Some legacy 11b clients cannot hack a complete 2124 * probe response frame. When the request includes 2125 * only a bare-bones rate set, communicate this to 2126 * the transmit side. 2127 */ 2128 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2129 break; 2130 } 2131 2132 case IEEE80211_FC0_SUBTYPE_ACTION: 2133 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2134 if (ni == vap->iv_bss) { 2135 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2136 wh, NULL, "%s", "unknown node"); 2137 vap->iv_stats.is_rx_mgtdiscard++; 2138 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2139 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2140 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2141 wh, NULL, "%s", "not for us"); 2142 vap->iv_stats.is_rx_mgtdiscard++; 2143 } else if (vap->iv_state != IEEE80211_S_RUN) { 2144 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2145 wh, NULL, "wrong state %s", 2146 ieee80211_state_name[vap->iv_state]); 2147 vap->iv_stats.is_rx_mgtdiscard++; 2148 } else { 2149 if (ieee80211_parse_action(ni, m0) == 0) 2150 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2151 } 2152 break; 2153 2154 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2155 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2156 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2157 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2158 case IEEE80211_FC0_SUBTYPE_ATIM: 2159 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2160 case IEEE80211_FC0_SUBTYPE_AUTH: 2161 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2162 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2163 wh, NULL, "%s", "not handled"); 2164 vap->iv_stats.is_rx_mgtdiscard++; 2165 break; 2166 2167 default: 2168 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2169 wh, "mgt", "subtype 0x%x not handled", subtype); 2170 vap->iv_stats.is_rx_badsubtype++; 2171 break; 2172 } 2173} 2174 2175static void 2176mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2177{ 2178 2179 switch (subtype) { 2180 case IEEE80211_FC0_SUBTYPE_BAR: 2181 ieee80211_recv_bar(ni, m); 2182 break; 2183 } 2184} 2185 2186/* 2187 * Parse meshpeering action ie's for MPM frames 2188 */ 2189static const struct ieee80211_meshpeer_ie * 2190mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2191 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2192 const uint8_t *frm, const uint8_t *efrm, 2193 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2194{ 2195 struct ieee80211vap *vap = ni->ni_vap; 2196 const struct ieee80211_meshpeer_ie *mpie; 2197 uint16_t args[3]; 2198 const uint8_t *meshid, *meshconf, *meshpeer; 2199 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2200 2201 meshid = meshconf = meshpeer = NULL; 2202 while (efrm - frm > 1) { 2203 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2204 switch (*frm) { 2205 case IEEE80211_ELEMID_MESHID: 2206 meshid = frm; 2207 break; 2208 case IEEE80211_ELEMID_MESHCONF: 2209 meshconf = frm; 2210 break; 2211 case IEEE80211_ELEMID_MESHPEER: 2212 meshpeer = frm; 2213 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2214 memset(mp, 0, sizeof(*mp)); 2215 mp->peer_len = mpie->peer_len; 2216 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 2217 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 2218 switch (subtype) { 2219 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2220 mp->peer_linkid = 2221 LE_READ_2(&mpie->peer_linkid); 2222 break; 2223 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2224 /* NB: peer link ID is optional */ 2225 if (mpie->peer_len == 2226 (IEEE80211_MPM_BASE_SZ + 2)) { 2227 mp->peer_linkid = 0; 2228 mp->peer_rcode = 2229 LE_READ_2(&mpie->peer_linkid); 2230 } else { 2231 mp->peer_linkid = 2232 LE_READ_2(&mpie->peer_linkid); 2233 mp->peer_rcode = 2234 LE_READ_2(&mpie->peer_rcode); 2235 } 2236 break; 2237 } 2238 break; 2239 } 2240 frm += frm[1] + 2; 2241 } 2242 2243 /* 2244 * Verify the contents of the frame. 2245 * If it fails validation, close the peer link. 2246 */ 2247 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2248 sendclose = 1; 2249 IEEE80211_DISCARD(vap, 2250 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2251 wh, NULL, "%s", "MPM validation failed"); 2252 } 2253 2254 /* If meshid is not the same reject any frames type. */ 2255 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2256 sendclose = 1; 2257 IEEE80211_DISCARD(vap, 2258 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2259 wh, NULL, "%s", "not for our mesh"); 2260 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2261 /* 2262 * Standard not clear about this, if we dont ignore 2263 * there will be an endless loop between nodes sending 2264 * CLOSE frames between each other with wrong meshid. 2265 * Discard and timers will bring FSM to IDLE state. 2266 */ 2267 return NULL; 2268 } 2269 } 2270 2271 /* 2272 * Close frames are accepted if meshid is the same. 2273 * Verify the other two types. 2274 */ 2275 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2276 mesh_verify_meshconf(vap, meshconf)) { 2277 sendclose = 1; 2278 IEEE80211_DISCARD(vap, 2279 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2280 wh, NULL, "%s", "configuration missmatch"); 2281 } 2282 2283 if (sendclose) { 2284 vap->iv_stats.is_rx_mgtdiscard++; 2285 switch (ni->ni_mlstate) { 2286 case IEEE80211_NODE_MESH_IDLE: 2287 case IEEE80211_NODE_MESH_ESTABLISHED: 2288 case IEEE80211_NODE_MESH_HOLDING: 2289 /* ignore */ 2290 break; 2291 case IEEE80211_NODE_MESH_OPENSNT: 2292 case IEEE80211_NODE_MESH_OPENRCV: 2293 case IEEE80211_NODE_MESH_CONFIRMRCV: 2294 args[0] = ni->ni_mlpid; 2295 args[1] = ni->ni_mllid; 2296 /* Reason codes for rejection */ 2297 switch (subtype) { 2298 case IEEE80211_ACTION_MESHPEERING_OPEN: 2299 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2300 break; 2301 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2302 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2303 break; 2304 } 2305 ieee80211_send_action(ni, 2306 IEEE80211_ACTION_CAT_SELF_PROT, 2307 IEEE80211_ACTION_MESHPEERING_CLOSE, 2308 args); 2309 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2310 mesh_peer_timeout_setup(ni); 2311 break; 2312 } 2313 return NULL; 2314 } 2315 2316 return (const struct ieee80211_meshpeer_ie *) mp; 2317} 2318 2319static int 2320mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2321 const struct ieee80211_frame *wh, 2322 const uint8_t *frm, const uint8_t *efrm) 2323{ 2324 struct ieee80211vap *vap = ni->ni_vap; 2325 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2326 struct ieee80211_meshpeer_ie ie; 2327 const struct ieee80211_meshpeer_ie *meshpeer; 2328 uint16_t args[3]; 2329 2330 /* +2+2 for action + code + capabilites */ 2331 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2332 IEEE80211_ACTION_MESHPEERING_OPEN); 2333 if (meshpeer == NULL) { 2334 return 0; 2335 } 2336 2337 /* XXX move up */ 2338 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2339 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2340 2341 switch (ni->ni_mlstate) { 2342 case IEEE80211_NODE_MESH_IDLE: 2343 /* Reject open request if reached our maximum neighbor count */ 2344 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2345 args[0] = meshpeer->peer_llinkid; 2346 args[1] = 0; 2347 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2348 ieee80211_send_action(ni, 2349 IEEE80211_ACTION_CAT_SELF_PROT, 2350 IEEE80211_ACTION_MESHPEERING_CLOSE, 2351 args); 2352 /* stay in IDLE state */ 2353 return (0); 2354 } 2355 /* Open frame accepted */ 2356 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2357 ni->ni_mllid = meshpeer->peer_llinkid; 2358 ni->ni_mlpid = mesh_generateid(vap); 2359 if (ni->ni_mlpid == 0) 2360 return 0; /* XXX */ 2361 args[0] = ni->ni_mlpid; 2362 /* Announce we're open too... */ 2363 ieee80211_send_action(ni, 2364 IEEE80211_ACTION_CAT_SELF_PROT, 2365 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2366 /* ...and confirm the link. */ 2367 args[0] = ni->ni_mlpid; 2368 args[1] = ni->ni_mllid; 2369 ieee80211_send_action(ni, 2370 IEEE80211_ACTION_CAT_SELF_PROT, 2371 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2372 args); 2373 mesh_peer_timeout_setup(ni); 2374 break; 2375 case IEEE80211_NODE_MESH_OPENRCV: 2376 /* Wrong Link ID */ 2377 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2378 args[0] = ni->ni_mllid; 2379 args[1] = ni->ni_mlpid; 2380 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2381 ieee80211_send_action(ni, 2382 IEEE80211_ACTION_CAT_SELF_PROT, 2383 IEEE80211_ACTION_MESHPEERING_CLOSE, 2384 args); 2385 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2386 mesh_peer_timeout_setup(ni); 2387 break; 2388 } 2389 /* Duplicate open, confirm again. */ 2390 args[0] = ni->ni_mlpid; 2391 args[1] = ni->ni_mllid; 2392 ieee80211_send_action(ni, 2393 IEEE80211_ACTION_CAT_SELF_PROT, 2394 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2395 args); 2396 break; 2397 case IEEE80211_NODE_MESH_OPENSNT: 2398 ni->ni_mllid = meshpeer->peer_llinkid; 2399 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2400 args[0] = ni->ni_mlpid; 2401 args[1] = ni->ni_mllid; 2402 ieee80211_send_action(ni, 2403 IEEE80211_ACTION_CAT_SELF_PROT, 2404 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2405 args); 2406 /* NB: don't setup/clear any timeout */ 2407 break; 2408 case IEEE80211_NODE_MESH_CONFIRMRCV: 2409 if (ni->ni_mlpid != meshpeer->peer_linkid || 2410 ni->ni_mllid != meshpeer->peer_llinkid) { 2411 args[0] = ni->ni_mlpid; 2412 args[1] = ni->ni_mllid; 2413 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2414 ieee80211_send_action(ni, 2415 IEEE80211_ACTION_CAT_SELF_PROT, 2416 IEEE80211_ACTION_MESHPEERING_CLOSE, 2417 args); 2418 mesh_linkchange(ni, 2419 IEEE80211_NODE_MESH_HOLDING); 2420 mesh_peer_timeout_setup(ni); 2421 break; 2422 } 2423 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2424 ni->ni_mllid = meshpeer->peer_llinkid; 2425 args[0] = ni->ni_mlpid; 2426 args[1] = ni->ni_mllid; 2427 ieee80211_send_action(ni, 2428 IEEE80211_ACTION_CAT_SELF_PROT, 2429 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2430 args); 2431 mesh_peer_timeout_stop(ni); 2432 break; 2433 case IEEE80211_NODE_MESH_ESTABLISHED: 2434 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2435 args[0] = ni->ni_mllid; 2436 args[1] = ni->ni_mlpid; 2437 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2438 ieee80211_send_action(ni, 2439 IEEE80211_ACTION_CAT_SELF_PROT, 2440 IEEE80211_ACTION_MESHPEERING_CLOSE, 2441 args); 2442 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2443 mesh_peer_timeout_setup(ni); 2444 break; 2445 } 2446 args[0] = ni->ni_mlpid; 2447 args[1] = ni->ni_mllid; 2448 ieee80211_send_action(ni, 2449 IEEE80211_ACTION_CAT_SELF_PROT, 2450 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2451 args); 2452 break; 2453 case IEEE80211_NODE_MESH_HOLDING: 2454 args[0] = ni->ni_mlpid; 2455 args[1] = meshpeer->peer_llinkid; 2456 /* Standard not clear about what the reaason code should be */ 2457 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2458 ieee80211_send_action(ni, 2459 IEEE80211_ACTION_CAT_SELF_PROT, 2460 IEEE80211_ACTION_MESHPEERING_CLOSE, 2461 args); 2462 break; 2463 } 2464 return 0; 2465} 2466 2467static int 2468mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2469 const struct ieee80211_frame *wh, 2470 const uint8_t *frm, const uint8_t *efrm) 2471{ 2472 struct ieee80211vap *vap = ni->ni_vap; 2473 struct ieee80211_meshpeer_ie ie; 2474 const struct ieee80211_meshpeer_ie *meshpeer; 2475 uint16_t args[3]; 2476 2477 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2478 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2479 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2480 if (meshpeer == NULL) { 2481 return 0; 2482 } 2483 2484 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2485 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2486 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2487 2488 switch (ni->ni_mlstate) { 2489 case IEEE80211_NODE_MESH_OPENRCV: 2490 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2491 mesh_peer_timeout_stop(ni); 2492 break; 2493 case IEEE80211_NODE_MESH_OPENSNT: 2494 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2495 mesh_peer_timeout_setup(ni); 2496 break; 2497 case IEEE80211_NODE_MESH_HOLDING: 2498 args[0] = ni->ni_mlpid; 2499 args[1] = meshpeer->peer_llinkid; 2500 /* Standard not clear about what the reaason code should be */ 2501 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2502 ieee80211_send_action(ni, 2503 IEEE80211_ACTION_CAT_SELF_PROT, 2504 IEEE80211_ACTION_MESHPEERING_CLOSE, 2505 args); 2506 break; 2507 case IEEE80211_NODE_MESH_CONFIRMRCV: 2508 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2509 args[0] = ni->ni_mlpid; 2510 args[1] = ni->ni_mllid; 2511 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2512 ieee80211_send_action(ni, 2513 IEEE80211_ACTION_CAT_SELF_PROT, 2514 IEEE80211_ACTION_MESHPEERING_CLOSE, 2515 args); 2516 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2517 mesh_peer_timeout_setup(ni); 2518 } 2519 break; 2520 default: 2521 IEEE80211_DISCARD(vap, 2522 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2523 wh, NULL, "received confirm in invalid state %d", 2524 ni->ni_mlstate); 2525 vap->iv_stats.is_rx_mgtdiscard++; 2526 break; 2527 } 2528 return 0; 2529} 2530 2531static int 2532mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2533 const struct ieee80211_frame *wh, 2534 const uint8_t *frm, const uint8_t *efrm) 2535{ 2536 struct ieee80211_meshpeer_ie ie; 2537 const struct ieee80211_meshpeer_ie *meshpeer; 2538 uint16_t args[3]; 2539 2540 /* +2 for action + code */ 2541 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2542 IEEE80211_ACTION_MESHPEERING_CLOSE); 2543 if (meshpeer == NULL) { 2544 return 0; 2545 } 2546 2547 /* 2548 * XXX: check reason code, for example we could receive 2549 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2550 * to peer again. 2551 */ 2552 2553 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2554 ni, "%s", "recv PEER CLOSE"); 2555 2556 switch (ni->ni_mlstate) { 2557 case IEEE80211_NODE_MESH_IDLE: 2558 /* ignore */ 2559 break; 2560 case IEEE80211_NODE_MESH_OPENRCV: 2561 case IEEE80211_NODE_MESH_OPENSNT: 2562 case IEEE80211_NODE_MESH_CONFIRMRCV: 2563 case IEEE80211_NODE_MESH_ESTABLISHED: 2564 args[0] = ni->ni_mlpid; 2565 args[1] = ni->ni_mllid; 2566 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2567 ieee80211_send_action(ni, 2568 IEEE80211_ACTION_CAT_SELF_PROT, 2569 IEEE80211_ACTION_MESHPEERING_CLOSE, 2570 args); 2571 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2572 mesh_peer_timeout_setup(ni); 2573 break; 2574 case IEEE80211_NODE_MESH_HOLDING: 2575 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2576 mesh_peer_timeout_stop(ni); 2577 break; 2578 } 2579 return 0; 2580} 2581 2582/* 2583 * Link Metric handling. 2584 */ 2585static int 2586mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2587 const struct ieee80211_frame *wh, 2588 const uint8_t *frm, const uint8_t *efrm) 2589{ 2590 const struct ieee80211_meshlmetric_ie *ie = 2591 (const struct ieee80211_meshlmetric_ie *) 2592 (frm+2); /* action + code */ 2593 struct ieee80211_meshlmetric_ie lm_rep; 2594 2595 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2596 lm_rep.lm_flags = 0; 2597 lm_rep.lm_metric = mesh_airtime_calc(ni); 2598 ieee80211_send_action(ni, 2599 IEEE80211_ACTION_CAT_MESH, 2600 IEEE80211_ACTION_MESH_LMETRIC, 2601 &lm_rep); 2602 } 2603 /* XXX: else do nothing for now */ 2604 return 0; 2605} 2606 2607/* 2608 * Parse meshgate action ie's for GANN frames. 2609 * Returns -1 if parsing fails, otherwise 0. 2610 */ 2611static int 2612mesh_parse_meshgate_action(struct ieee80211_node *ni, 2613 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2614 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2615{ 2616 struct ieee80211vap *vap = ni->ni_vap; 2617 const struct ieee80211_meshgann_ie *gannie; 2618 2619 while (efrm - frm > 1) { 2620 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2621 switch (*frm) { 2622 case IEEE80211_ELEMID_MESHGANN: 2623 gannie = (const struct ieee80211_meshgann_ie *) frm; 2624 memset(ie, 0, sizeof(ie)); 2625 ie->gann_ie = gannie->gann_ie; 2626 ie->gann_len = gannie->gann_len; 2627 ie->gann_flags = gannie->gann_flags; 2628 ie->gann_hopcount = gannie->gann_hopcount; 2629 ie->gann_ttl = gannie->gann_ttl; 2630 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2631 ie->gann_seq = LE_READ_4(&gannie->gann_seq); 2632 ie->gann_interval = LE_READ_2(&gannie->gann_interval); 2633 break; 2634 } 2635 frm += frm[1] + 2; 2636 } 2637 2638 return 0; 2639} 2640 2641/* 2642 * Mesh Gate Announcement handling. 2643 */ 2644static int 2645mesh_recv_action_meshgate(struct ieee80211_node *ni, 2646 const struct ieee80211_frame *wh, 2647 const uint8_t *frm, const uint8_t *efrm) 2648{ 2649 struct ieee80211vap *vap = ni->ni_vap; 2650 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2651 struct ieee80211_mesh_gate_route *gr, *next; 2652 struct ieee80211_mesh_route *rt_gate; 2653 struct ieee80211_meshgann_ie pgann; 2654 struct ieee80211_meshgann_ie ie; 2655 int found = 0; 2656 2657 /* +2 for action + code */ 2658 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2659 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2660 ni->ni_macaddr, NULL, "%s", 2661 "GANN parsing failed"); 2662 vap->iv_stats.is_rx_mgtdiscard++; 2663 return (0); 2664 } 2665 2666 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2667 return 0; 2668 2669 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2670 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2671 ie.gann_seq); 2672 2673 if (ms == NULL) 2674 return (0); 2675 MESH_RT_LOCK(ms); 2676 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2677 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2678 continue; 2679 if (ie.gann_seq <= gr->gr_lastseq) { 2680 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2681 ni->ni_macaddr, NULL, 2682 "GANN old seqno %u <= %u", 2683 ie.gann_seq, gr->gr_lastseq); 2684 MESH_RT_UNLOCK(ms); 2685 return (0); 2686 } 2687 /* corresponding mesh gate found & GANN accepted */ 2688 found = 1; 2689 break; 2690 2691 } 2692 if (found == 0) { 2693 /* this GANN is from a new mesh Gate add it to known table. */ 2694 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2695 "stored new GANN information, seq %u.", ie.gann_seq); 2696 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2697 M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO); 2698 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2699 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2700 } 2701 gr->gr_lastseq = ie.gann_seq; 2702 2703 /* check if we have a path to this gate */ 2704 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2705 if (rt_gate != NULL && 2706 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2707 gr->gr_route = rt_gate; 2708 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2709 } 2710 2711 MESH_RT_UNLOCK(ms); 2712 2713 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2714 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2715 return 0; 2716 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2717 pgann.gann_hopcount = ie.gann_hopcount + 1; 2718 pgann.gann_ttl = ie.gann_ttl - 1; 2719 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2720 pgann.gann_seq = ie.gann_seq; 2721 pgann.gann_interval = ie.gann_interval; 2722 2723 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2724 "%s", "propagate GANN"); 2725 2726 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2727 IEEE80211_ACTION_MESH_GANN, &pgann); 2728 2729 return 0; 2730} 2731 2732static int 2733mesh_send_action(struct ieee80211_node *ni, 2734 const uint8_t sa[IEEE80211_ADDR_LEN], 2735 const uint8_t da[IEEE80211_ADDR_LEN], 2736 struct mbuf *m) 2737{ 2738 struct ieee80211vap *vap = ni->ni_vap; 2739 struct ieee80211com *ic = ni->ni_ic; 2740 struct ieee80211_bpf_params params; 2741 struct ieee80211_frame *wh; 2742 2743 KASSERT(ni != NULL, ("null node")); 2744 2745 if (vap->iv_state == IEEE80211_S_CAC) { 2746 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2747 "block %s frame in CAC state", "Mesh action"); 2748 vap->iv_stats.is_tx_badstate++; 2749 ieee80211_free_node(ni); 2750 m_freem(m); 2751 return EIO; /* XXX */ 2752 } 2753 2754 M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 2755 if (m == NULL) { 2756 ieee80211_free_node(ni); 2757 return ENOMEM; 2758 } 2759 2760 wh = mtod(m, struct ieee80211_frame *); 2761 ieee80211_send_setup(ni, m, 2762 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2763 IEEE80211_NONQOS_TID, sa, da, sa); 2764 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2765 2766 memset(¶ms, 0, sizeof(params)); 2767 params.ibp_pri = WME_AC_VO; 2768 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2769 if (IEEE80211_IS_MULTICAST(da)) 2770 params.ibp_try0 = 1; 2771 else 2772 params.ibp_try0 = ni->ni_txparms->maxretry; 2773 params.ibp_power = ni->ni_txpower; 2774 2775 IEEE80211_NODE_STAT(ni, tx_mgmt); 2776 2777 return ic->ic_raw_xmit(ni, m, ¶ms); 2778} 2779 2780#define ADDSHORT(frm, v) do { \ 2781 frm[0] = (v) & 0xff; \ 2782 frm[1] = (v) >> 8; \ 2783 frm += 2; \ 2784} while (0) 2785#define ADDWORD(frm, v) do { \ 2786 frm[0] = (v) & 0xff; \ 2787 frm[1] = ((v) >> 8) & 0xff; \ 2788 frm[2] = ((v) >> 16) & 0xff; \ 2789 frm[3] = ((v) >> 24) & 0xff; \ 2790 frm += 4; \ 2791} while (0) 2792 2793static int 2794mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2795 int category, int action, void *args0) 2796{ 2797 struct ieee80211vap *vap = ni->ni_vap; 2798 struct ieee80211com *ic = ni->ni_ic; 2799 uint16_t *args = args0; 2800 const struct ieee80211_rateset *rs; 2801 struct mbuf *m; 2802 uint8_t *frm; 2803 2804 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2805 "send PEER OPEN action: localid 0x%x", args[0]); 2806 2807 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2808 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2809 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2810 ieee80211_ref_node(ni); 2811 2812 m = ieee80211_getmgtframe(&frm, 2813 ic->ic_headroom + sizeof(struct ieee80211_frame), 2814 sizeof(uint16_t) /* action+category */ 2815 + sizeof(uint16_t) /* capabilites */ 2816 + 2 + IEEE80211_RATE_SIZE 2817 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2818 + 2 + IEEE80211_MESHID_LEN 2819 + sizeof(struct ieee80211_meshconf_ie) 2820 + sizeof(struct ieee80211_meshpeer_ie) 2821 ); 2822 if (m != NULL) { 2823 /* 2824 * mesh peer open action frame format: 2825 * [1] category 2826 * [1] action 2827 * [2] capabilities 2828 * [tlv] rates 2829 * [tlv] xrates 2830 * [tlv] mesh id 2831 * [tlv] mesh conf 2832 * [tlv] mesh peer link mgmt 2833 */ 2834 *frm++ = category; 2835 *frm++ = action; 2836 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2837 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2838 frm = ieee80211_add_rates(frm, rs); 2839 frm = ieee80211_add_xrates(frm, rs); 2840 frm = ieee80211_add_meshid(frm, vap); 2841 frm = ieee80211_add_meshconf(frm, vap); 2842 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2843 args[0], 0, 0); 2844 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2845 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2846 } else { 2847 vap->iv_stats.is_tx_nobuf++; 2848 ieee80211_free_node(ni); 2849 return ENOMEM; 2850 } 2851} 2852 2853static int 2854mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2855 int category, int action, void *args0) 2856{ 2857 struct ieee80211vap *vap = ni->ni_vap; 2858 struct ieee80211com *ic = ni->ni_ic; 2859 uint16_t *args = args0; 2860 const struct ieee80211_rateset *rs; 2861 struct mbuf *m; 2862 uint8_t *frm; 2863 2864 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2865 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2866 args[0], args[1]); 2867 2868 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2869 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2870 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2871 ieee80211_ref_node(ni); 2872 2873 m = ieee80211_getmgtframe(&frm, 2874 ic->ic_headroom + sizeof(struct ieee80211_frame), 2875 sizeof(uint16_t) /* action+category */ 2876 + sizeof(uint16_t) /* capabilites */ 2877 + sizeof(uint16_t) /* status code */ 2878 + sizeof(uint16_t) /* AID */ 2879 + 2 + IEEE80211_RATE_SIZE 2880 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2881 + 2 + IEEE80211_MESHID_LEN 2882 + sizeof(struct ieee80211_meshconf_ie) 2883 + sizeof(struct ieee80211_meshpeer_ie) 2884 ); 2885 if (m != NULL) { 2886 /* 2887 * mesh peer confirm action frame format: 2888 * [1] category 2889 * [1] action 2890 * [2] capabilities 2891 * [2] status code 2892 * [2] association id (peer ID) 2893 * [tlv] rates 2894 * [tlv] xrates 2895 * [tlv] mesh id 2896 * [tlv] mesh conf 2897 * [tlv] mesh peer link mgmt 2898 */ 2899 *frm++ = category; 2900 *frm++ = action; 2901 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2902 ADDSHORT(frm, 0); /* status code */ 2903 ADDSHORT(frm, args[1]); /* AID */ 2904 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2905 frm = ieee80211_add_rates(frm, rs); 2906 frm = ieee80211_add_xrates(frm, rs); 2907 frm = ieee80211_add_meshid(frm, vap); 2908 frm = ieee80211_add_meshconf(frm, vap); 2909 frm = ieee80211_add_meshpeer(frm, 2910 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2911 args[0], args[1], 0); 2912 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2913 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2914 } else { 2915 vap->iv_stats.is_tx_nobuf++; 2916 ieee80211_free_node(ni); 2917 return ENOMEM; 2918 } 2919} 2920 2921static int 2922mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2923 int category, int action, void *args0) 2924{ 2925 struct ieee80211vap *vap = ni->ni_vap; 2926 struct ieee80211com *ic = ni->ni_ic; 2927 uint16_t *args = args0; 2928 struct mbuf *m; 2929 uint8_t *frm; 2930 2931 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2932 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2933 args[0], args[1], args[2]); 2934 2935 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2936 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2937 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2938 ieee80211_ref_node(ni); 2939 2940 m = ieee80211_getmgtframe(&frm, 2941 ic->ic_headroom + sizeof(struct ieee80211_frame), 2942 sizeof(uint16_t) /* action+category */ 2943 + sizeof(uint16_t) /* reason code */ 2944 + 2 + IEEE80211_MESHID_LEN 2945 + sizeof(struct ieee80211_meshpeer_ie) 2946 ); 2947 if (m != NULL) { 2948 /* 2949 * mesh peer close action frame format: 2950 * [1] category 2951 * [1] action 2952 * [tlv] mesh id 2953 * [tlv] mesh peer link mgmt 2954 */ 2955 *frm++ = category; 2956 *frm++ = action; 2957 frm = ieee80211_add_meshid(frm, vap); 2958 frm = ieee80211_add_meshpeer(frm, 2959 IEEE80211_ACTION_MESHPEERING_CLOSE, 2960 args[0], args[1], args[2]); 2961 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2962 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2963 } else { 2964 vap->iv_stats.is_tx_nobuf++; 2965 ieee80211_free_node(ni); 2966 return ENOMEM; 2967 } 2968} 2969 2970static int 2971mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2972 int category, int action, void *arg0) 2973{ 2974 struct ieee80211vap *vap = ni->ni_vap; 2975 struct ieee80211com *ic = ni->ni_ic; 2976 struct ieee80211_meshlmetric_ie *ie = arg0; 2977 struct mbuf *m; 2978 uint8_t *frm; 2979 2980 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2981 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2982 ni, "%s", "send LINK METRIC REQUEST action"); 2983 } else { 2984 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2985 ni, "send LINK METRIC REPLY action: metric 0x%x", 2986 ie->lm_metric); 2987 } 2988 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2989 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2990 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2991 ieee80211_ref_node(ni); 2992 2993 m = ieee80211_getmgtframe(&frm, 2994 ic->ic_headroom + sizeof(struct ieee80211_frame), 2995 sizeof(uint16_t) + /* action+category */ 2996 sizeof(struct ieee80211_meshlmetric_ie) 2997 ); 2998 if (m != NULL) { 2999 /* 3000 * mesh link metric 3001 * [1] category 3002 * [1] action 3003 * [tlv] mesh link metric 3004 */ 3005 *frm++ = category; 3006 *frm++ = action; 3007 frm = ieee80211_add_meshlmetric(frm, 3008 ie->lm_flags, ie->lm_metric); 3009 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3010 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 3011 } else { 3012 vap->iv_stats.is_tx_nobuf++; 3013 ieee80211_free_node(ni); 3014 return ENOMEM; 3015 } 3016} 3017 3018static int 3019mesh_send_action_meshgate(struct ieee80211_node *ni, 3020 int category, int action, void *arg0) 3021{ 3022 struct ieee80211vap *vap = ni->ni_vap; 3023 struct ieee80211com *ic = ni->ni_ic; 3024 struct ieee80211_meshgann_ie *ie = arg0; 3025 struct mbuf *m; 3026 uint8_t *frm; 3027 3028 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3029 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 3030 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 3031 ieee80211_ref_node(ni); 3032 3033 m = ieee80211_getmgtframe(&frm, 3034 ic->ic_headroom + sizeof(struct ieee80211_frame), 3035 sizeof(uint16_t) + /* action+category */ 3036 IEEE80211_MESHGANN_BASE_SZ 3037 ); 3038 if (m != NULL) { 3039 /* 3040 * mesh link metric 3041 * [1] category 3042 * [1] action 3043 * [tlv] mesh gate annoucement 3044 */ 3045 *frm++ = category; 3046 *frm++ = action; 3047 frm = ieee80211_add_meshgate(frm, ie); 3048 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3049 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 3050 } else { 3051 vap->iv_stats.is_tx_nobuf++; 3052 ieee80211_free_node(ni); 3053 return ENOMEM; 3054 } 3055} 3056 3057static void 3058mesh_peer_timeout_setup(struct ieee80211_node *ni) 3059{ 3060 switch (ni->ni_mlstate) { 3061 case IEEE80211_NODE_MESH_HOLDING: 3062 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 3063 break; 3064 case IEEE80211_NODE_MESH_CONFIRMRCV: 3065 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 3066 break; 3067 case IEEE80211_NODE_MESH_IDLE: 3068 ni->ni_mltval = 0; 3069 break; 3070 default: 3071 ni->ni_mltval = ieee80211_mesh_retrytimeout; 3072 break; 3073 } 3074 if (ni->ni_mltval) 3075 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 3076 mesh_peer_timeout_cb, ni); 3077} 3078 3079/* 3080 * Same as above but backoffs timer statisically 50%. 3081 */ 3082static void 3083mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3084{ 3085 uint32_t r; 3086 3087 r = arc4random(); 3088 ni->ni_mltval += r % ni->ni_mltval; 3089 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3090 ni); 3091} 3092 3093static __inline void 3094mesh_peer_timeout_stop(struct ieee80211_node *ni) 3095{ 3096 callout_drain(&ni->ni_mltimer); 3097} 3098 3099static void 3100mesh_peer_backoff_cb(void *arg) 3101{ 3102 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3103 3104 /* After backoff timeout, try to peer automatically again. */ 3105 ni->ni_mlhcnt = 0; 3106} 3107 3108/* 3109 * Mesh Peer Link Management FSM timeout handling. 3110 */ 3111static void 3112mesh_peer_timeout_cb(void *arg) 3113{ 3114 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3115 uint16_t args[3]; 3116 3117 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3118 ni, "mesh link timeout, state %d, retry counter %d", 3119 ni->ni_mlstate, ni->ni_mlrcnt); 3120 3121 switch (ni->ni_mlstate) { 3122 case IEEE80211_NODE_MESH_IDLE: 3123 case IEEE80211_NODE_MESH_ESTABLISHED: 3124 break; 3125 case IEEE80211_NODE_MESH_OPENSNT: 3126 case IEEE80211_NODE_MESH_OPENRCV: 3127 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3128 args[0] = ni->ni_mlpid; 3129 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3130 ieee80211_send_action(ni, 3131 IEEE80211_ACTION_CAT_SELF_PROT, 3132 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3133 ni->ni_mlrcnt = 0; 3134 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3135 mesh_peer_timeout_setup(ni); 3136 } else { 3137 args[0] = ni->ni_mlpid; 3138 ieee80211_send_action(ni, 3139 IEEE80211_ACTION_CAT_SELF_PROT, 3140 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3141 ni->ni_mlrcnt++; 3142 mesh_peer_timeout_backoff(ni); 3143 } 3144 break; 3145 case IEEE80211_NODE_MESH_CONFIRMRCV: 3146 args[0] = ni->ni_mlpid; 3147 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3148 ieee80211_send_action(ni, 3149 IEEE80211_ACTION_CAT_SELF_PROT, 3150 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3151 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3152 mesh_peer_timeout_setup(ni); 3153 break; 3154 case IEEE80211_NODE_MESH_HOLDING: 3155 ni->ni_mlhcnt++; 3156 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3157 callout_reset(&ni->ni_mlhtimer, 3158 ieee80211_mesh_backofftimeout, 3159 mesh_peer_backoff_cb, ni); 3160 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3161 break; 3162 } 3163} 3164 3165static int 3166mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3167{ 3168 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3169 3170 if (ie == NULL || ie[1] != ms->ms_idlen) 3171 return 1; 3172 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3173} 3174 3175/* 3176 * Check if we are using the same algorithms for this mesh. 3177 */ 3178static int 3179mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3180{ 3181 const struct ieee80211_meshconf_ie *meshconf = 3182 (const struct ieee80211_meshconf_ie *) ie; 3183 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3184 3185 if (meshconf == NULL) 3186 return 1; 3187 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3188 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3189 "unknown path selection algorithm: 0x%x\n", 3190 meshconf->conf_pselid); 3191 return 1; 3192 } 3193 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3194 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3195 "unknown path metric algorithm: 0x%x\n", 3196 meshconf->conf_pmetid); 3197 return 1; 3198 } 3199 if (meshconf->conf_ccid != 0) { 3200 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3201 "unknown congestion control algorithm: 0x%x\n", 3202 meshconf->conf_ccid); 3203 return 1; 3204 } 3205 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3206 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3207 "unknown sync algorithm: 0x%x\n", 3208 meshconf->conf_syncid); 3209 return 1; 3210 } 3211 if (meshconf->conf_authid != 0) { 3212 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3213 "unknown auth auth algorithm: 0x%x\n", 3214 meshconf->conf_pselid); 3215 return 1; 3216 } 3217 /* Not accepting peers */ 3218 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3219 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3220 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3221 return 1; 3222 } 3223 return 0; 3224} 3225 3226static int 3227mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3228 const uint8_t *ie) 3229{ 3230 const struct ieee80211_meshpeer_ie *meshpeer = 3231 (const struct ieee80211_meshpeer_ie *) ie; 3232 3233 if (meshpeer == NULL || 3234 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3235 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3236 return 1; 3237 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3238 IEEE80211_DPRINTF(vap, 3239 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3240 "Only MPM protocol is supported (proto: 0x%02X)", 3241 meshpeer->peer_proto); 3242 return 1; 3243 } 3244 switch (subtype) { 3245 case IEEE80211_ACTION_MESHPEERING_OPEN: 3246 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3247 return 1; 3248 break; 3249 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3250 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3251 return 1; 3252 break; 3253 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3254 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3255 return 1; 3256 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3257 meshpeer->peer_linkid != 0) 3258 return 1; 3259 if (meshpeer->peer_rcode == 0) 3260 return 1; 3261 break; 3262 } 3263 return 0; 3264} 3265 3266/* 3267 * Add a Mesh ID IE to a frame. 3268 */ 3269uint8_t * 3270ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3271{ 3272 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3273 3274 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3275 3276 *frm++ = IEEE80211_ELEMID_MESHID; 3277 *frm++ = ms->ms_idlen; 3278 memcpy(frm, ms->ms_id, ms->ms_idlen); 3279 return frm + ms->ms_idlen; 3280} 3281 3282/* 3283 * Add a Mesh Configuration IE to a frame. 3284 * For now just use HWMP routing, Airtime link metric, Null Congestion 3285 * Signaling, Null Sync Protocol and Null Authentication. 3286 */ 3287uint8_t * 3288ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3289{ 3290 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3291 uint16_t caps; 3292 3293 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3294 3295 *frm++ = IEEE80211_ELEMID_MESHCONF; 3296 *frm++ = IEEE80211_MESH_CONF_SZ; 3297 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3298 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3299 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3300 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3301 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3302 /* NB: set the number of neighbors before the rest */ 3303 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3304 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3305 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3306 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3307 frm += 1; 3308 caps = 0; 3309 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3310 caps |= IEEE80211_MESHCONF_CAP_AP; 3311 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3312 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3313 *frm++ = caps; 3314 return frm; 3315} 3316 3317/* 3318 * Add a Mesh Peer Management IE to a frame. 3319 */ 3320uint8_t * 3321ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3322 uint16_t peerid, uint16_t reason) 3323{ 3324 3325 KASSERT(localid != 0, ("localid == 0")); 3326 3327 *frm++ = IEEE80211_ELEMID_MESHPEER; 3328 switch (subtype) { 3329 case IEEE80211_ACTION_MESHPEERING_OPEN: 3330 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3331 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3332 ADDSHORT(frm, localid); /* local ID */ 3333 break; 3334 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3335 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3336 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3337 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3338 ADDSHORT(frm, localid); /* local ID */ 3339 ADDSHORT(frm, peerid); /* peer ID */ 3340 break; 3341 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3342 if (peerid) 3343 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3344 else 3345 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3346 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3347 ADDSHORT(frm, localid); /* local ID */ 3348 if (peerid) 3349 ADDSHORT(frm, peerid); /* peer ID */ 3350 ADDSHORT(frm, reason); 3351 break; 3352 } 3353 return frm; 3354} 3355 3356/* 3357 * Compute an Airtime Link Metric for the link with this node. 3358 * 3359 * Based on Draft 3.0 spec (11B.10, p.149). 3360 */ 3361/* 3362 * Max 802.11s overhead. 3363 */ 3364#define IEEE80211_MESH_MAXOVERHEAD \ 3365 (sizeof(struct ieee80211_qosframe_addr4) \ 3366 + sizeof(struct ieee80211_meshcntl_ae10) \ 3367 + sizeof(struct llc) \ 3368 + IEEE80211_ADDR_LEN \ 3369 + IEEE80211_WEP_IVLEN \ 3370 + IEEE80211_WEP_KIDLEN \ 3371 + IEEE80211_WEP_CRCLEN \ 3372 + IEEE80211_WEP_MICLEN \ 3373 + IEEE80211_CRC_LEN) 3374uint32_t 3375mesh_airtime_calc(struct ieee80211_node *ni) 3376{ 3377#define M_BITS 8 3378#define S_FACTOR (2 * M_BITS) 3379 struct ieee80211com *ic = ni->ni_ic; 3380 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3381 const static int nbits = 8192 << M_BITS; 3382 uint32_t overhead, rate, errrate; 3383 uint64_t res; 3384 3385 /* Time to transmit a frame */ 3386 rate = ni->ni_txrate; 3387 overhead = ieee80211_compute_duration(ic->ic_rt, 3388 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3389 /* Error rate in percentage */ 3390 /* XXX assuming small failures are ok */ 3391 errrate = (((ifp->if_oerrors + 3392 ifp->if_ierrors) / 100) << M_BITS) / 100; 3393 res = (overhead + (nbits / rate)) * 3394 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3395 3396 return (uint32_t)(res >> S_FACTOR); 3397#undef M_BITS 3398#undef S_FACTOR 3399} 3400 3401/* 3402 * Add a Mesh Link Metric report IE to a frame. 3403 */ 3404uint8_t * 3405ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3406{ 3407 *frm++ = IEEE80211_ELEMID_MESHLINK; 3408 *frm++ = 5; 3409 *frm++ = flags; 3410 ADDWORD(frm, metric); 3411 return frm; 3412} 3413 3414/* 3415 * Add a Mesh Gate Announcement IE to a frame. 3416 */ 3417uint8_t * 3418ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3419{ 3420 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3421 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3422 *frm++ = ie->gann_flags; 3423 *frm++ = ie->gann_hopcount; 3424 *frm++ = ie->gann_ttl; 3425 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3426 frm += 6; 3427 ADDWORD(frm, ie->gann_seq); 3428 ADDSHORT(frm, ie->gann_interval); 3429 return frm; 3430} 3431#undef ADDSHORT 3432#undef ADDWORD 3433 3434/* 3435 * Initialize any mesh-specific node state. 3436 */ 3437void 3438ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3439{ 3440 ni->ni_flags |= IEEE80211_NODE_QOS; 3441 callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE); 3442 callout_init(&ni->ni_mlhtimer, CALLOUT_MPSAFE); 3443} 3444 3445/* 3446 * Cleanup any mesh-specific node state. 3447 */ 3448void 3449ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3450{ 3451 struct ieee80211vap *vap = ni->ni_vap; 3452 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3453 3454 callout_drain(&ni->ni_mltimer); 3455 callout_drain(&ni->ni_mlhtimer); 3456 /* NB: short-circuit callbacks after mesh_vdetach */ 3457 if (vap->iv_mesh != NULL) 3458 ms->ms_ppath->mpp_peerdown(ni); 3459} 3460 3461void 3462ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3463{ 3464 ni->ni_meshidlen = ie[1]; 3465 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3466} 3467 3468/* 3469 * Setup mesh-specific node state on neighbor discovery. 3470 */ 3471void 3472ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3473 const struct ieee80211_frame *wh, 3474 const struct ieee80211_scanparams *sp) 3475{ 3476 ieee80211_parse_meshid(ni, sp->meshid); 3477} 3478 3479void 3480ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3481 struct ieee80211_beacon_offsets *bo) 3482{ 3483 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3484 3485 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3486 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3487 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3488 } 3489} 3490 3491static int 3492mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3493{ 3494 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3495 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3496 struct ieee80211_mesh_route *rt; 3497 struct ieee80211req_mesh_route *imr; 3498 size_t len, off; 3499 uint8_t *p; 3500 int error; 3501 3502 if (vap->iv_opmode != IEEE80211_M_MBSS) 3503 return ENOSYS; 3504 3505 error = 0; 3506 switch (ireq->i_type) { 3507 case IEEE80211_IOC_MESH_ID: 3508 ireq->i_len = ms->ms_idlen; 3509 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3510 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3511 break; 3512 case IEEE80211_IOC_MESH_AP: 3513 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3514 break; 3515 case IEEE80211_IOC_MESH_FWRD: 3516 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3517 break; 3518 case IEEE80211_IOC_MESH_GATE: 3519 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3520 break; 3521 case IEEE80211_IOC_MESH_TTL: 3522 ireq->i_val = ms->ms_ttl; 3523 break; 3524 case IEEE80211_IOC_MESH_RTCMD: 3525 switch (ireq->i_val) { 3526 case IEEE80211_MESH_RTCMD_LIST: 3527 len = 0; 3528 MESH_RT_LOCK(ms); 3529 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3530 len += sizeof(*imr); 3531 } 3532 MESH_RT_UNLOCK(ms); 3533 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3534 ireq->i_len = len; 3535 return ENOMEM; 3536 } 3537 ireq->i_len = len; 3538 /* XXX M_WAIT? */ 3539 p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO); 3540 if (p == NULL) 3541 return ENOMEM; 3542 off = 0; 3543 MESH_RT_LOCK(ms); 3544 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3545 if (off >= len) 3546 break; 3547 imr = (struct ieee80211req_mesh_route *) 3548 (p + off); 3549 IEEE80211_ADDR_COPY(imr->imr_dest, 3550 rt->rt_dest); 3551 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3552 rt->rt_nexthop); 3553 imr->imr_metric = rt->rt_metric; 3554 imr->imr_nhops = rt->rt_nhops; 3555 imr->imr_lifetime = 3556 ieee80211_mesh_rt_update(rt, 0); 3557 imr->imr_lastmseq = rt->rt_lastmseq; 3558 imr->imr_flags = rt->rt_flags; /* last */ 3559 off += sizeof(*imr); 3560 } 3561 MESH_RT_UNLOCK(ms); 3562 error = copyout(p, (uint8_t *)ireq->i_data, 3563 ireq->i_len); 3564 free(p, M_TEMP); 3565 break; 3566 case IEEE80211_MESH_RTCMD_FLUSH: 3567 case IEEE80211_MESH_RTCMD_ADD: 3568 case IEEE80211_MESH_RTCMD_DELETE: 3569 return EINVAL; 3570 default: 3571 return ENOSYS; 3572 } 3573 break; 3574 case IEEE80211_IOC_MESH_PR_METRIC: 3575 len = strlen(ms->ms_pmetric->mpm_descr); 3576 if (ireq->i_len < len) 3577 return EINVAL; 3578 ireq->i_len = len; 3579 error = copyout(ms->ms_pmetric->mpm_descr, 3580 (uint8_t *)ireq->i_data, len); 3581 break; 3582 case IEEE80211_IOC_MESH_PR_PATH: 3583 len = strlen(ms->ms_ppath->mpp_descr); 3584 if (ireq->i_len < len) 3585 return EINVAL; 3586 ireq->i_len = len; 3587 error = copyout(ms->ms_ppath->mpp_descr, 3588 (uint8_t *)ireq->i_data, len); 3589 break; 3590 default: 3591 return ENOSYS; 3592 } 3593 3594 return error; 3595} 3596IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3597 3598static int 3599mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3600{ 3601 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3602 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3603 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3604 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3605 int error; 3606 3607 if (vap->iv_opmode != IEEE80211_M_MBSS) 3608 return ENOSYS; 3609 3610 error = 0; 3611 switch (ireq->i_type) { 3612 case IEEE80211_IOC_MESH_ID: 3613 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3614 return EINVAL; 3615 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3616 if (error != 0) 3617 break; 3618 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3619 ms->ms_idlen = ireq->i_len; 3620 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3621 error = ENETRESET; 3622 break; 3623 case IEEE80211_IOC_MESH_AP: 3624 if (ireq->i_val) 3625 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3626 else 3627 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3628 error = ENETRESET; 3629 break; 3630 case IEEE80211_IOC_MESH_FWRD: 3631 if (ireq->i_val) 3632 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3633 else 3634 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3635 mesh_gatemode_setup(vap); 3636 break; 3637 case IEEE80211_IOC_MESH_GATE: 3638 if (ireq->i_val) 3639 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3640 else 3641 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3642 break; 3643 case IEEE80211_IOC_MESH_TTL: 3644 ms->ms_ttl = (uint8_t) ireq->i_val; 3645 break; 3646 case IEEE80211_IOC_MESH_RTCMD: 3647 switch (ireq->i_val) { 3648 case IEEE80211_MESH_RTCMD_LIST: 3649 return EINVAL; 3650 case IEEE80211_MESH_RTCMD_FLUSH: 3651 ieee80211_mesh_rt_flush(vap); 3652 break; 3653 case IEEE80211_MESH_RTCMD_ADD: 3654 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3655 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3656 return EINVAL; 3657 error = copyin(ireq->i_data, &tmpaddr, 3658 IEEE80211_ADDR_LEN); 3659 if (error == 0) 3660 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3661 break; 3662 case IEEE80211_MESH_RTCMD_DELETE: 3663 ieee80211_mesh_rt_del(vap, ireq->i_data); 3664 break; 3665 default: 3666 return ENOSYS; 3667 } 3668 break; 3669 case IEEE80211_IOC_MESH_PR_METRIC: 3670 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3671 if (error == 0) { 3672 error = mesh_select_proto_metric(vap, tmpproto); 3673 if (error == 0) 3674 error = ENETRESET; 3675 } 3676 break; 3677 case IEEE80211_IOC_MESH_PR_PATH: 3678 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3679 if (error == 0) { 3680 error = mesh_select_proto_path(vap, tmpproto); 3681 if (error == 0) 3682 error = ENETRESET; 3683 } 3684 break; 3685 default: 3686 return ENOSYS; 3687 } 3688 return error; 3689} 3690IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3691