ieee80211_mesh.c revision 246510
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 246510 2013-02-07 21:25:32Z monthadar $"); 32#endif 33 34/* 35 * IEEE 802.11s Mesh Point (MBSS) support. 36 * 37 * Based on March 2009, D3.0 802.11s draft spec. 38 */ 39#include "opt_inet.h" 40#include "opt_wlan.h" 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/mbuf.h> 45#include <sys/malloc.h> 46#include <sys/kernel.h> 47 48#include <sys/socket.h> 49#include <sys/sockio.h> 50#include <sys/endian.h> 51#include <sys/errno.h> 52#include <sys/proc.h> 53#include <sys/sysctl.h> 54 55#include <net/if.h> 56#include <net/if_media.h> 57#include <net/if_llc.h> 58#include <net/ethernet.h> 59 60#include <net80211/ieee80211_var.h> 61#include <net80211/ieee80211_action.h> 62#include <net80211/ieee80211_input.h> 63#include <net80211/ieee80211_mesh.h> 64 65static void mesh_rt_flush_invalid(struct ieee80211vap *); 66static int mesh_select_proto_path(struct ieee80211vap *, const char *); 67static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 68static void mesh_vattach(struct ieee80211vap *); 69static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 70static void mesh_rt_cleanup_cb(void *); 71static void mesh_gatemode_setup(struct ieee80211vap *); 72static void mesh_gatemode_cb(void *); 73static void mesh_linkchange(struct ieee80211_node *, 74 enum ieee80211_mesh_mlstate); 75static void mesh_checkid(void *, struct ieee80211_node *); 76static uint32_t mesh_generateid(struct ieee80211vap *); 77static int mesh_checkpseq(struct ieee80211vap *, 78 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 79static struct ieee80211_node * 80 mesh_find_txnode(struct ieee80211vap *, 81 const uint8_t [IEEE80211_ADDR_LEN]); 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 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 537 "%s", "send broadcast GANN"); 538 539 gann.gann_flags = 0; /* Reserved */ 540 gann.gann_hopcount = 0; 541 gann.gann_ttl = ms->ms_ttl; 542 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 543 gann.gann_seq = ms->ms_gateseq++; 544 gann.gann_interval = ieee80211_mesh_gateint; 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 */ 1005static struct ieee80211_node * 1006mesh_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 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) { 1016 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1017 "%s: !valid or proxy, flags 0x%x", __func__, rt->rt_flags); 1018 /* XXX stat */ 1019 return NULL; 1020 } 1021 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1022} 1023 1024/* 1025 * Forward the queued frames to known valid mesh gates. 1026 * Assume destination to be outside the MBSS (i.e. proxy entry), 1027 * If no valid mesh gates are known silently discard queued frames. 1028 * If there is no 802.2 path route will be timedout. 1029 */ 1030void 1031ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1032 struct ieee80211_mesh_route *rt_dest) 1033{ 1034 struct ieee80211com *ic = vap->iv_ic; 1035 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1036 struct ifnet *ifp = vap->iv_ifp; 1037 struct ieee80211_mesh_route *rt_gate; 1038 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1039 struct mbuf *m, *next; 1040 int gates_found = 0; 1041 1042 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1043 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1044 1045 /* XXX: send to more than one valid mash gate */ 1046 MESH_RT_LOCK(ms); 1047 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1048 rt_gate = gr->gr_route; 1049 if (rt_gate == NULL) { 1050 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1051 rt_dest->rt_dest, 1052 "mesh gate with no path %6D", 1053 gr->gr_addr, ":"); 1054 continue; 1055 } 1056 gates_found = 1; 1057 /* convert route to a proxy route */ 1058 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1059 IEEE80211_MESHRT_FLAGS_VALID; 1060 rt_dest->rt_ext_seq = 1; /* random value */ 1061 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1062 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1063 rt_dest->rt_metric = rt_gate->rt_metric; 1064 rt_dest->rt_nhops = rt_gate->rt_nhops; 1065 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1066 MESH_RT_UNLOCK(ms); 1067 m = ieee80211_ageq_remove(&ic->ic_stageq, 1068 (struct ieee80211_node *)(uintptr_t) 1069 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1070 for (; m != NULL; m = next) { 1071 next = m->m_nextpkt; 1072 m->m_nextpkt = NULL; 1073 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, rt_dest->rt_dest, 1074 "flush queued frame %p len %d", m, m->m_pkthdr.len); 1075 ifp->if_transmit(ifp, m); 1076 } 1077 MESH_RT_LOCK(ms); 1078 } 1079 1080 if (gates_found == 0) { 1081 rt_dest->rt_flags = 0; /* Mark invalid */ 1082 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, rt_dest->rt_dest, 1083 "%s", "no mesh gate found, or no path setup for mesh gate yet"); 1084 } 1085 MESH_RT_UNLOCK(ms); 1086 1087} 1088 1089/* 1090 * Forward the specified frame. 1091 * Decrement the TTL and set TA to our MAC address. 1092 */ 1093static void 1094mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1095 const struct ieee80211_meshcntl *mc) 1096{ 1097 struct ieee80211com *ic = vap->iv_ic; 1098 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1099 struct ifnet *ifp = vap->iv_ifp; 1100 struct ifnet *parent = ic->ic_ifp; 1101 const struct ieee80211_frame *wh = 1102 mtod(m, const struct ieee80211_frame *); 1103 struct mbuf *mcopy; 1104 struct ieee80211_meshcntl *mccopy; 1105 struct ieee80211_frame *whcopy; 1106 struct ieee80211_node *ni; 1107 int err; 1108 1109 /* 1110 * mesh ttl of 1 means we are the last one receving it, 1111 * according to amendment we decrement and then check if 1112 * 0, if so we dont forward. 1113 */ 1114 if (mc->mc_ttl < 1) { 1115 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1116 "%s", "frame not fwd'd, ttl 1"); 1117 vap->iv_stats.is_mesh_fwd_ttl++; 1118 return; 1119 } 1120 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1121 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1122 "%s", "frame not fwd'd, fwding disabled"); 1123 vap->iv_stats.is_mesh_fwd_disabled++; 1124 return; 1125 } 1126 mcopy = m_dup(m, M_NOWAIT); 1127 if (mcopy == NULL) { 1128 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1129 "%s", "frame not fwd'd, cannot dup"); 1130 vap->iv_stats.is_mesh_fwd_nobuf++; 1131 ifp->if_oerrors++; 1132 return; 1133 } 1134 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1135 sizeof(struct ieee80211_meshcntl)); 1136 if (mcopy == NULL) { 1137 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1138 "%s", "frame not fwd'd, too short"); 1139 vap->iv_stats.is_mesh_fwd_tooshort++; 1140 ifp->if_oerrors++; 1141 m_freem(mcopy); 1142 return; 1143 } 1144 whcopy = mtod(mcopy, struct ieee80211_frame *); 1145 mccopy = (struct ieee80211_meshcntl *) 1146 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1147 /* XXX clear other bits? */ 1148 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1149 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1150 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1151 ni = ieee80211_ref_node(vap->iv_bss); 1152 mcopy->m_flags |= M_MCAST; 1153 } else { 1154 ni = mesh_find_txnode(vap, whcopy->i_addr3); 1155 if (ni == NULL) { 1156 /* 1157 * [Optional] any of the following three actions: 1158 * o silently discard 1159 * o trigger a path discovery 1160 * o inform TA that meshDA is unknown. 1161 */ 1162 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1163 "%s", "frame not fwd'd, no path"); 1164 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1165 IEEE80211_REASON_MESH_PERR_NO_FI); 1166 vap->iv_stats.is_mesh_fwd_nopath++; 1167 m_freem(mcopy); 1168 return; 1169 } 1170 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1171 } 1172 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1173 mccopy->mc_ttl--; 1174 1175 /* XXX calculate priority so drivers can find the tx queue */ 1176 M_WME_SETAC(mcopy, WME_AC_BE); 1177 1178 /* XXX do we know m_nextpkt is NULL? */ 1179 mcopy->m_pkthdr.rcvif = (void *) ni; 1180 err = parent->if_transmit(parent, mcopy); 1181 if (err != 0) { 1182 /* NB: IFQ_HANDOFF reclaims mbuf */ 1183 ieee80211_free_node(ni); 1184 } else { 1185 ifp->if_opackets++; 1186 } 1187} 1188 1189static struct mbuf * 1190mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1191{ 1192#define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1193#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1194 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1195 sizeof(struct ieee80211_meshcntl_ae10)]; 1196 const struct ieee80211_qosframe_addr4 *wh; 1197 const struct ieee80211_meshcntl_ae10 *mc; 1198 struct ether_header *eh; 1199 struct llc *llc; 1200 int ae; 1201 1202 if (m->m_len < hdrlen + sizeof(*llc) && 1203 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1204 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1205 "discard data frame: %s", "m_pullup failed"); 1206 vap->iv_stats.is_rx_tooshort++; 1207 return NULL; 1208 } 1209 memcpy(b, mtod(m, caddr_t), hdrlen); 1210 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1211 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1212 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1213 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1214 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1215 1216 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1217 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1218 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1219 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1220 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1221 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1222 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1223 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1224 llc = NULL; 1225 } else { 1226 m_adj(m, hdrlen - sizeof(*eh)); 1227 } 1228 eh = mtod(m, struct ether_header *); 1229 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1230 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1231 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1232 if (ae == IEEE80211_MESH_AE_00) { 1233 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1234 } else if (ae == IEEE80211_MESH_AE_01) { 1235 IEEE80211_ADDR_COPY(eh->ether_shost, 1236 MC01(mc)->mc_addr4); 1237 } else { 1238 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1239 (const struct ieee80211_frame *)wh, NULL, 1240 "bad AE %d", ae); 1241 vap->iv_stats.is_mesh_badae++; 1242 m_freem(m); 1243 return NULL; 1244 } 1245 } else { 1246 if (ae == IEEE80211_MESH_AE_00) { 1247 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1248 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1249 } else if (ae == IEEE80211_MESH_AE_10) { 1250 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1251 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1252 } else { 1253 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1254 (const struct ieee80211_frame *)wh, NULL, 1255 "bad AE %d", ae); 1256 vap->iv_stats.is_mesh_badae++; 1257 m_freem(m); 1258 return NULL; 1259 } 1260 } 1261#ifdef ALIGNED_POINTER 1262 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1263 m = ieee80211_realign(vap, m, sizeof(*eh)); 1264 if (m == NULL) 1265 return NULL; 1266 } 1267#endif /* ALIGNED_POINTER */ 1268 if (llc != NULL) { 1269 eh = mtod(m, struct ether_header *); 1270 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1271 } 1272 return m; 1273#undef WDIR 1274#undef MC01 1275} 1276 1277/* 1278 * Return non-zero if the unicast mesh data frame should be processed 1279 * locally. Frames that are not proxy'd have our address, otherwise 1280 * we need to consult the routing table to look for a proxy entry. 1281 */ 1282static __inline int 1283mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1284 const struct ieee80211_meshcntl *mc) 1285{ 1286 int ae = mc->mc_flags & 3; 1287 1288 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1289 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1290 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1291 ("bad AE %d", ae)); 1292 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1293 const struct ieee80211_meshcntl_ae10 *mc10 = 1294 (const struct ieee80211_meshcntl_ae10 *) mc; 1295 struct ieee80211_mesh_route *rt = 1296 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1297 /* check for proxy route to ourself */ 1298 return (rt != NULL && 1299 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1300 } else /* ucast w/o proxy */ 1301 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1302} 1303 1304/* 1305 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1306 * > 0 means we have forwarded data and no need to process locally 1307 * == 0 means we want to process locally (and we may have forwarded data 1308 * < 0 means there was an error and data should be discarded 1309 */ 1310static int 1311mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1312 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1313{ 1314 struct ieee80211_qosframe_addr4 *qwh; 1315 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1316 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1317 1318 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1319 1320 /* 1321 * TODO: 1322 * o verify addr2 is a legitimate transmitter 1323 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1324 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1325 */ 1326 1327 /* set lifetime of addr3 (meshDA) to initial value */ 1328 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1329 if (rt_meshda == NULL) { 1330 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1331 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1332 /* 1333 * [Optional] any of the following three actions: 1334 * o silently discard [X] 1335 * o trigger a path discovery [ ] 1336 * o inform TA that meshDA is unknown. [ ] 1337 */ 1338 /* XXX: stats */ 1339 return (-1); 1340 } 1341 1342 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1343 ms->ms_ppath->mpp_inact)); 1344 1345 /* set lifetime of addr4 (meshSA) to initial value */ 1346 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1347 KASSERT(rt_meshsa != NULL, ("no route")); 1348 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1349 ms->ms_ppath->mpp_inact)); 1350 1351 mesh_forward(vap, m, mc); 1352 return (1); /* dont process locally */ 1353} 1354 1355/* 1356 * Verifies transmitter, updates lifetime, precursor list and process data 1357 * locally, if data is proxy with AE = 10 it could mean data should go 1358 * on another mesh path or data should be forwarded to the DS. 1359 * 1360 * > 0 means we have forwarded data and no need to process locally 1361 * == 0 means we want to process locally (and we may have forwarded data 1362 * < 0 means there was an error and data should be discarded 1363 */ 1364static int 1365mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1366 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1367{ 1368 struct ieee80211_qosframe_addr4 *qwh; 1369 const struct ieee80211_meshcntl_ae10 *mc10; 1370 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1371 struct ieee80211_mesh_route *rt; 1372 int ae; 1373 1374 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1375 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1376 1377 /* 1378 * TODO: 1379 * o verify addr2 is a legitimate transmitter 1380 * o lifetime of precursor entry is max(init, curr) 1381 */ 1382 1383 /* set lifetime of addr4 (meshSA) to initial value */ 1384 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1385 KASSERT(rt != NULL, ("no route")); 1386 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1387 rt = NULL; 1388 1389 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1390 KASSERT(ae == IEEE80211_MESH_AE_00 || 1391 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1392 if (ae == IEEE80211_MESH_AE_10) { 1393 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1394 return (0); /* process locally */ 1395 } 1396 1397 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1398 if (rt != NULL && 1399 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1400 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1401 /* 1402 * Forward on another mesh-path, according to 1403 * amendment as specified in 9.32.4.1 1404 */ 1405 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1406 mesh_forward(vap, m, 1407 (const struct ieee80211_meshcntl *)mc10); 1408 return (1); /* dont process locally */ 1409 } 1410 /* 1411 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1412 * addressed according to 13.11.3.2. 1413 */ 1414 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1415 "forward frame to DS, SA(%6D) DA(%6D)", 1416 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1417 } 1418 return (0); /* process locally */ 1419} 1420 1421/* 1422 * Try to forward the group addressed data on to other mesh STAs, and 1423 * also to the DS. 1424 * 1425 * > 0 means we have forwarded data and no need to process locally 1426 * == 0 means we want to process locally (and we may have forwarded data 1427 * < 0 means there was an error and data should be discarded 1428 */ 1429static int 1430mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1431 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1432{ 1433#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1434 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1435 1436 mesh_forward(vap, m, mc); 1437 1438 if(mc->mc_ttl > 0) { 1439 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1440 /* 1441 * Forward of MSDUs from the MBSS to DS group addressed 1442 * (according to 13.11.3.2) 1443 * This happens by delivering the packet, and a bridge 1444 * will sent it on another port member. 1445 */ 1446 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1447 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1448 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1449 MC01(mc)->mc_addr4, "%s", 1450 "forward from MBSS to the DS"); 1451 } 1452 } 1453 return (0); /* process locally */ 1454#undef MC01 1455} 1456 1457static int 1458mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 1459{ 1460#define HAS_SEQ(type) ((type & 0x4) == 0) 1461#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1462#define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1463 struct ieee80211vap *vap = ni->ni_vap; 1464 struct ieee80211com *ic = ni->ni_ic; 1465 struct ifnet *ifp = vap->iv_ifp; 1466 struct ieee80211_frame *wh; 1467 const struct ieee80211_meshcntl *mc; 1468 int hdrspace, meshdrlen, need_tap, error; 1469 uint8_t dir, type, subtype, ae; 1470 uint32_t seq; 1471 const uint8_t *addr; 1472 uint8_t qos[2]; 1473 ieee80211_seq rxseq; 1474 1475 KASSERT(ni != NULL, ("null node")); 1476 ni->ni_inact = ni->ni_inact_reload; 1477 1478 need_tap = 1; /* mbuf need to be tapped. */ 1479 type = -1; /* undefined */ 1480 1481 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1482 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1483 ni->ni_macaddr, NULL, 1484 "too short (1): len %u", m->m_pkthdr.len); 1485 vap->iv_stats.is_rx_tooshort++; 1486 goto out; 1487 } 1488 /* 1489 * Bit of a cheat here, we use a pointer for a 3-address 1490 * frame format but don't reference fields past outside 1491 * ieee80211_frame_min w/o first validating the data is 1492 * present. 1493 */ 1494 wh = mtod(m, struct ieee80211_frame *); 1495 1496 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1497 IEEE80211_FC0_VERSION_0) { 1498 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1499 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1500 vap->iv_stats.is_rx_badversion++; 1501 goto err; 1502 } 1503 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1504 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1505 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1506 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1507 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1508 ni->ni_noise = nf; 1509 if (HAS_SEQ(type)) { 1510 uint8_t tid = ieee80211_gettid(wh); 1511 1512 if (IEEE80211_QOS_HAS_SEQ(wh) && 1513 TID_TO_WME_AC(tid) >= WME_AC_VI) 1514 ic->ic_wme.wme_hipri_traffic++; 1515 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1516 if (! ieee80211_check_rxseq(ni, wh)) { 1517 /* duplicate, discard */ 1518 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1519 wh->i_addr1, "duplicate", 1520 "seqno <%u,%u> fragno <%u,%u> tid %u", 1521 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1522 ni->ni_rxseqs[tid] >> 1523 IEEE80211_SEQ_SEQ_SHIFT, 1524 rxseq & IEEE80211_SEQ_FRAG_MASK, 1525 ni->ni_rxseqs[tid] & 1526 IEEE80211_SEQ_FRAG_MASK, 1527 tid); 1528 vap->iv_stats.is_rx_dup++; 1529 IEEE80211_NODE_STAT(ni, rx_dup); 1530 goto out; 1531 } 1532 ni->ni_rxseqs[tid] = rxseq; 1533 } 1534 } 1535#ifdef IEEE80211_DEBUG 1536 /* 1537 * It's easier, but too expensive, to simulate different mesh 1538 * topologies by consulting the ACL policy very early, so do this 1539 * only under DEBUG. 1540 * 1541 * NB: this check is also done upon peering link initiation. 1542 */ 1543 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1544 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1545 wh, NULL, "%s", "disallowed by ACL"); 1546 vap->iv_stats.is_rx_acl++; 1547 goto out; 1548 } 1549#endif 1550 switch (type) { 1551 case IEEE80211_FC0_TYPE_DATA: 1552 if (ni == vap->iv_bss) 1553 goto out; 1554 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1555 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1556 ni->ni_macaddr, NULL, 1557 "peer link not yet established (%d)", 1558 ni->ni_mlstate); 1559 vap->iv_stats.is_mesh_nolink++; 1560 goto out; 1561 } 1562 if (dir != IEEE80211_FC1_DIR_FROMDS && 1563 dir != IEEE80211_FC1_DIR_DSTODS) { 1564 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1565 wh, "data", "incorrect dir 0x%x", dir); 1566 vap->iv_stats.is_rx_wrongdir++; 1567 goto err; 1568 } 1569 1570 /* All Mesh data frames are QoS subtype */ 1571 if (!HAS_SEQ(type)) { 1572 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1573 wh, "data", "incorrect subtype 0x%x", subtype); 1574 vap->iv_stats.is_rx_badsubtype++; 1575 goto err; 1576 } 1577 1578 /* 1579 * Next up, any fragmentation. 1580 * XXX: we defrag before we even try to forward, 1581 * Mesh Control field is not present in sub-sequent 1582 * fragmented frames. This is in contrast to Draft 4.0. 1583 */ 1584 hdrspace = ieee80211_hdrspace(ic, wh); 1585 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1586 m = ieee80211_defrag(ni, m, hdrspace); 1587 if (m == NULL) { 1588 /* Fragment dropped or frame not complete yet */ 1589 goto out; 1590 } 1591 } 1592 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1593 1594 /* 1595 * Now we have a complete Mesh Data frame. 1596 */ 1597 1598 /* 1599 * Only fromDStoDS data frames use 4 address qos frames 1600 * as specified in amendment. Otherwise addr4 is located 1601 * in the Mesh Control field and a 3 address qos frame 1602 * is used. 1603 */ 1604 if (IEEE80211_IS_DSTODS(wh)) 1605 *(uint16_t *)qos = *(uint16_t *) 1606 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1607 else 1608 *(uint16_t *)qos = *(uint16_t *) 1609 ((struct ieee80211_qosframe *)wh)->i_qos; 1610 1611 /* 1612 * NB: The mesh STA sets the Mesh Control Present 1613 * subfield to 1 in the Mesh Data frame containing 1614 * an unfragmented MSDU, an A-MSDU, or the first 1615 * fragment of an MSDU. 1616 * After defrag it should always be present. 1617 */ 1618 if (!(qos[1] & IEEE80211_QOS_MC)) { 1619 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1620 ni->ni_macaddr, NULL, 1621 "%s", "Mesh control field not present"); 1622 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1623 goto err; 1624 } 1625 1626 /* pull up enough to get to the mesh control */ 1627 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1628 (m = m_pullup(m, hdrspace + 1629 sizeof(struct ieee80211_meshcntl))) == NULL) { 1630 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1631 ni->ni_macaddr, NULL, 1632 "data too short: expecting %u", hdrspace); 1633 vap->iv_stats.is_rx_tooshort++; 1634 goto out; /* XXX */ 1635 } 1636 /* 1637 * Now calculate the full extent of the headers. Note 1638 * mesh_decap will pull up anything we didn't get 1639 * above when it strips the 802.11 headers. 1640 */ 1641 mc = (const struct ieee80211_meshcntl *) 1642 (mtod(m, const uint8_t *) + hdrspace); 1643 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1644 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1645 ae * IEEE80211_ADDR_LEN; 1646 hdrspace += meshdrlen; 1647 1648 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1649 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1650 (m->m_len < hdrspace) && 1651 ((m = m_pullup(m, hdrspace)) == NULL)) { 1652 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1653 ni->ni_macaddr, NULL, 1654 "data too short: expecting %u", hdrspace); 1655 vap->iv_stats.is_rx_tooshort++; 1656 goto out; /* XXX */ 1657 } 1658 /* XXX: are we sure there is no reallocating after m_pullup? */ 1659 1660 seq = LE_READ_4(mc->mc_seq); 1661 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1662 addr = wh->i_addr3; 1663 else if (ae == IEEE80211_MESH_AE_01) 1664 addr = MC01(mc)->mc_addr4; 1665 else 1666 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1667 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1668 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1669 addr, "data", "%s", "not to me"); 1670 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1671 goto out; 1672 } 1673 if (mesh_checkpseq(vap, addr, seq) != 0) { 1674 vap->iv_stats.is_rx_dup++; 1675 goto out; 1676 } 1677 1678 /* This code "routes" the frame to the right control path */ 1679 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1680 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1681 error = 1682 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1683 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1684 error = mesh_recv_group_data(vap, m, wh, mc); 1685 else 1686 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1687 wh, mc); 1688 } else 1689 error = mesh_recv_group_data(vap, m, wh, mc); 1690 if (error < 0) 1691 goto err; 1692 else if (error > 0) 1693 goto out; 1694 1695 if (ieee80211_radiotap_active_vap(vap)) 1696 ieee80211_radiotap_rx(vap, m); 1697 need_tap = 0; 1698 1699 /* 1700 * Finally, strip the 802.11 header. 1701 */ 1702 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1703 if (m == NULL) { 1704 /* XXX mask bit to check for both */ 1705 /* don't count Null data frames as errors */ 1706 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1707 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1708 goto out; 1709 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1710 ni->ni_macaddr, "data", "%s", "decap error"); 1711 vap->iv_stats.is_rx_decap++; 1712 IEEE80211_NODE_STAT(ni, rx_decap); 1713 goto err; 1714 } 1715 if (qos[0] & IEEE80211_QOS_AMSDU) { 1716 m = ieee80211_decap_amsdu(ni, m); 1717 if (m == NULL) 1718 return IEEE80211_FC0_TYPE_DATA; 1719 } 1720 ieee80211_deliver_data(vap, ni, m); 1721 return type; 1722 case IEEE80211_FC0_TYPE_MGT: 1723 vap->iv_stats.is_rx_mgmt++; 1724 IEEE80211_NODE_STAT(ni, rx_mgmt); 1725 if (dir != IEEE80211_FC1_DIR_NODS) { 1726 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1727 wh, "mgt", "incorrect dir 0x%x", dir); 1728 vap->iv_stats.is_rx_wrongdir++; 1729 goto err; 1730 } 1731 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1732 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1733 ni->ni_macaddr, "mgt", "too short: len %u", 1734 m->m_pkthdr.len); 1735 vap->iv_stats.is_rx_tooshort++; 1736 goto out; 1737 } 1738#ifdef IEEE80211_DEBUG 1739 if ((ieee80211_msg_debug(vap) && 1740 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1741 ieee80211_msg_dumppkts(vap)) { 1742 if_printf(ifp, "received %s from %s rssi %d\n", 1743 ieee80211_mgt_subtype_name[subtype >> 1744 IEEE80211_FC0_SUBTYPE_SHIFT], 1745 ether_sprintf(wh->i_addr2), rssi); 1746 } 1747#endif 1748 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1749 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1750 wh, NULL, "%s", "WEP set but not permitted"); 1751 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1752 goto out; 1753 } 1754 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1755 goto out; 1756 case IEEE80211_FC0_TYPE_CTL: 1757 vap->iv_stats.is_rx_ctl++; 1758 IEEE80211_NODE_STAT(ni, rx_ctrl); 1759 goto out; 1760 default: 1761 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1762 wh, "bad", "frame type 0x%x", type); 1763 /* should not come here */ 1764 break; 1765 } 1766err: 1767 ifp->if_ierrors++; 1768out: 1769 if (m != NULL) { 1770 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1771 ieee80211_radiotap_rx(vap, m); 1772 m_freem(m); 1773 } 1774 return type; 1775#undef HAS_SEQ 1776#undef MC01 1777#undef MC10 1778} 1779 1780static void 1781mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1782 int rssi, int nf) 1783{ 1784 struct ieee80211vap *vap = ni->ni_vap; 1785 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1786 struct ieee80211com *ic = ni->ni_ic; 1787 struct ieee80211_frame *wh; 1788 struct ieee80211_mesh_route *rt; 1789 uint8_t *frm, *efrm; 1790 1791 wh = mtod(m0, struct ieee80211_frame *); 1792 frm = (uint8_t *)&wh[1]; 1793 efrm = mtod(m0, uint8_t *) + m0->m_len; 1794 switch (subtype) { 1795 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1796 case IEEE80211_FC0_SUBTYPE_BEACON: 1797 { 1798 struct ieee80211_scanparams scan; 1799 /* 1800 * We process beacon/probe response 1801 * frames to discover neighbors. 1802 */ 1803 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1804 return; 1805 /* 1806 * Count frame now that we know it's to be processed. 1807 */ 1808 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1809 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1810 IEEE80211_NODE_STAT(ni, rx_beacons); 1811 } else 1812 IEEE80211_NODE_STAT(ni, rx_proberesp); 1813 /* 1814 * If scanning, just pass information to the scan module. 1815 */ 1816 if (ic->ic_flags & IEEE80211_F_SCAN) { 1817 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1818 /* 1819 * Actively scanning a channel marked passive; 1820 * send a probe request now that we know there 1821 * is 802.11 traffic present. 1822 * 1823 * XXX check if the beacon we recv'd gives 1824 * us what we need and suppress the probe req 1825 */ 1826 ieee80211_probe_curchan(vap, 1); 1827 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1828 } 1829 ieee80211_add_scan(vap, &scan, wh, 1830 subtype, rssi, nf); 1831 return; 1832 } 1833 1834 /* The rest of this code assumes we are running */ 1835 if (vap->iv_state != IEEE80211_S_RUN) 1836 return; 1837 /* 1838 * Ignore non-mesh STAs. 1839 */ 1840 if ((scan.capinfo & 1841 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1842 scan.meshid == NULL || scan.meshconf == NULL) { 1843 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1844 wh, "beacon", "%s", "not a mesh sta"); 1845 vap->iv_stats.is_mesh_wrongmesh++; 1846 return; 1847 } 1848 /* 1849 * Ignore STAs for other mesh networks. 1850 */ 1851 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1852 mesh_verify_meshconf(vap, scan.meshconf)) { 1853 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1854 wh, "beacon", "%s", "not for our mesh"); 1855 vap->iv_stats.is_mesh_wrongmesh++; 1856 return; 1857 } 1858 /* 1859 * Peer only based on the current ACL policy. 1860 */ 1861 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1862 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1863 wh, NULL, "%s", "disallowed by ACL"); 1864 vap->iv_stats.is_rx_acl++; 1865 return; 1866 } 1867 /* 1868 * Do neighbor discovery. 1869 */ 1870 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1871 /* 1872 * Create a new entry in the neighbor table. 1873 */ 1874 ni = ieee80211_add_neighbor(vap, wh, &scan); 1875 } 1876 /* 1877 * Automatically peer with discovered nodes if possible. 1878 */ 1879 if (ni != vap->iv_bss && 1880 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1881 switch (ni->ni_mlstate) { 1882 case IEEE80211_NODE_MESH_IDLE: 1883 { 1884 uint16_t args[1]; 1885 1886 /* Wait for backoff callout to reset counter */ 1887 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1888 return; 1889 1890 ni->ni_mlpid = mesh_generateid(vap); 1891 if (ni->ni_mlpid == 0) 1892 return; 1893 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1894 args[0] = ni->ni_mlpid; 1895 ieee80211_send_action(ni, 1896 IEEE80211_ACTION_CAT_SELF_PROT, 1897 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1898 ni->ni_mlrcnt = 0; 1899 mesh_peer_timeout_setup(ni); 1900 break; 1901 } 1902 case IEEE80211_NODE_MESH_ESTABLISHED: 1903 { 1904 /* 1905 * Valid beacon from a peer mesh STA 1906 * bump TA lifetime 1907 */ 1908 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1909 if(rt != NULL) { 1910 ieee80211_mesh_rt_update(rt, 1911 ticks_to_msecs( 1912 ms->ms_ppath->mpp_inact)); 1913 } 1914 break; 1915 } 1916 default: 1917 break; /* ignore */ 1918 } 1919 } 1920 break; 1921 } 1922 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1923 { 1924 uint8_t *ssid, *meshid, *rates, *xrates; 1925 uint8_t *sfrm; 1926 1927 if (vap->iv_state != IEEE80211_S_RUN) { 1928 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1929 wh, NULL, "wrong state %s", 1930 ieee80211_state_name[vap->iv_state]); 1931 vap->iv_stats.is_rx_mgtdiscard++; 1932 return; 1933 } 1934 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1935 /* frame must be directed */ 1936 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1937 wh, NULL, "%s", "not unicast"); 1938 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1939 return; 1940 } 1941 /* 1942 * prreq frame format 1943 * [tlv] ssid 1944 * [tlv] supported rates 1945 * [tlv] extended supported rates 1946 * [tlv] mesh id 1947 */ 1948 ssid = meshid = rates = xrates = NULL; 1949 sfrm = frm; 1950 while (efrm - frm > 1) { 1951 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1952 switch (*frm) { 1953 case IEEE80211_ELEMID_SSID: 1954 ssid = frm; 1955 break; 1956 case IEEE80211_ELEMID_RATES: 1957 rates = frm; 1958 break; 1959 case IEEE80211_ELEMID_XRATES: 1960 xrates = frm; 1961 break; 1962 case IEEE80211_ELEMID_MESHID: 1963 meshid = frm; 1964 break; 1965 } 1966 frm += frm[1] + 2; 1967 } 1968 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1969 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1970 if (xrates != NULL) 1971 IEEE80211_VERIFY_ELEMENT(xrates, 1972 IEEE80211_RATE_MAXSIZE - rates[1], return); 1973 if (meshid != NULL) { 1974 IEEE80211_VERIFY_ELEMENT(meshid, 1975 IEEE80211_MESHID_LEN, return); 1976 /* NB: meshid, not ssid */ 1977 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 1978 } 1979 1980 /* XXX find a better class or define it's own */ 1981 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1982 "%s", "recv probe req"); 1983 /* 1984 * Some legacy 11b clients cannot hack a complete 1985 * probe response frame. When the request includes 1986 * only a bare-bones rate set, communicate this to 1987 * the transmit side. 1988 */ 1989 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 1990 break; 1991 } 1992 1993 case IEEE80211_FC0_SUBTYPE_ACTION: 1994 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 1995 if (ni == vap->iv_bss) { 1996 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1997 wh, NULL, "%s", "unknown node"); 1998 vap->iv_stats.is_rx_mgtdiscard++; 1999 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2000 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2001 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2002 wh, NULL, "%s", "not for us"); 2003 vap->iv_stats.is_rx_mgtdiscard++; 2004 } else if (vap->iv_state != IEEE80211_S_RUN) { 2005 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2006 wh, NULL, "wrong state %s", 2007 ieee80211_state_name[vap->iv_state]); 2008 vap->iv_stats.is_rx_mgtdiscard++; 2009 } else { 2010 if (ieee80211_parse_action(ni, m0) == 0) 2011 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2012 } 2013 break; 2014 2015 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2016 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2017 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2018 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2019 case IEEE80211_FC0_SUBTYPE_ATIM: 2020 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2021 case IEEE80211_FC0_SUBTYPE_AUTH: 2022 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2023 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2024 wh, NULL, "%s", "not handled"); 2025 vap->iv_stats.is_rx_mgtdiscard++; 2026 break; 2027 2028 default: 2029 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2030 wh, "mgt", "subtype 0x%x not handled", subtype); 2031 vap->iv_stats.is_rx_badsubtype++; 2032 break; 2033 } 2034} 2035 2036static void 2037mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2038{ 2039 2040 switch (subtype) { 2041 case IEEE80211_FC0_SUBTYPE_BAR: 2042 ieee80211_recv_bar(ni, m); 2043 break; 2044 } 2045} 2046 2047/* 2048 * Parse meshpeering action ie's for MPM frames 2049 */ 2050static const struct ieee80211_meshpeer_ie * 2051mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2052 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2053 const uint8_t *frm, const uint8_t *efrm, 2054 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2055{ 2056 struct ieee80211vap *vap = ni->ni_vap; 2057 const struct ieee80211_meshpeer_ie *mpie; 2058 uint16_t args[3]; 2059 const uint8_t *meshid, *meshconf, *meshpeer; 2060 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2061 2062 meshid = meshconf = meshpeer = NULL; 2063 while (efrm - frm > 1) { 2064 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2065 switch (*frm) { 2066 case IEEE80211_ELEMID_MESHID: 2067 meshid = frm; 2068 break; 2069 case IEEE80211_ELEMID_MESHCONF: 2070 meshconf = frm; 2071 break; 2072 case IEEE80211_ELEMID_MESHPEER: 2073 meshpeer = frm; 2074 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2075 memset(mp, 0, sizeof(*mp)); 2076 mp->peer_len = mpie->peer_len; 2077 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 2078 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 2079 switch (subtype) { 2080 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2081 mp->peer_linkid = 2082 LE_READ_2(&mpie->peer_linkid); 2083 break; 2084 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2085 /* NB: peer link ID is optional */ 2086 if (mpie->peer_len == 2087 (IEEE80211_MPM_BASE_SZ + 2)) { 2088 mp->peer_linkid = 0; 2089 mp->peer_rcode = 2090 LE_READ_2(&mpie->peer_linkid); 2091 } else { 2092 mp->peer_linkid = 2093 LE_READ_2(&mpie->peer_linkid); 2094 mp->peer_rcode = 2095 LE_READ_2(&mpie->peer_rcode); 2096 } 2097 break; 2098 } 2099 break; 2100 } 2101 frm += frm[1] + 2; 2102 } 2103 2104 /* 2105 * Verify the contents of the frame. 2106 * If it fails validation, close the peer link. 2107 */ 2108 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2109 sendclose = 1; 2110 IEEE80211_DISCARD(vap, 2111 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2112 wh, NULL, "%s", "MPM validation failed"); 2113 } 2114 2115 /* If meshid is not the same reject any frames type. */ 2116 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2117 sendclose = 1; 2118 IEEE80211_DISCARD(vap, 2119 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2120 wh, NULL, "%s", "not for our mesh"); 2121 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2122 /* 2123 * Standard not clear about this, if we dont ignore 2124 * there will be an endless loop between nodes sending 2125 * CLOSE frames between each other with wrong meshid. 2126 * Discard and timers will bring FSM to IDLE state. 2127 */ 2128 return NULL; 2129 } 2130 } 2131 2132 /* 2133 * Close frames are accepted if meshid is the same. 2134 * Verify the other two types. 2135 */ 2136 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2137 mesh_verify_meshconf(vap, meshconf)) { 2138 sendclose = 1; 2139 IEEE80211_DISCARD(vap, 2140 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2141 wh, NULL, "%s", "configuration missmatch"); 2142 } 2143 2144 if (sendclose) { 2145 vap->iv_stats.is_rx_mgtdiscard++; 2146 switch (ni->ni_mlstate) { 2147 case IEEE80211_NODE_MESH_IDLE: 2148 case IEEE80211_NODE_MESH_ESTABLISHED: 2149 case IEEE80211_NODE_MESH_HOLDING: 2150 /* ignore */ 2151 break; 2152 case IEEE80211_NODE_MESH_OPENSNT: 2153 case IEEE80211_NODE_MESH_OPENRCV: 2154 case IEEE80211_NODE_MESH_CONFIRMRCV: 2155 args[0] = ni->ni_mlpid; 2156 args[1] = ni->ni_mllid; 2157 /* Reason codes for rejection */ 2158 switch (subtype) { 2159 case IEEE80211_ACTION_MESHPEERING_OPEN: 2160 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2161 break; 2162 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2163 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2164 break; 2165 } 2166 ieee80211_send_action(ni, 2167 IEEE80211_ACTION_CAT_SELF_PROT, 2168 IEEE80211_ACTION_MESHPEERING_CLOSE, 2169 args); 2170 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2171 mesh_peer_timeout_setup(ni); 2172 break; 2173 } 2174 return NULL; 2175 } 2176 2177 return (const struct ieee80211_meshpeer_ie *) mp; 2178} 2179 2180static int 2181mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2182 const struct ieee80211_frame *wh, 2183 const uint8_t *frm, const uint8_t *efrm) 2184{ 2185 struct ieee80211vap *vap = ni->ni_vap; 2186 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2187 struct ieee80211_meshpeer_ie ie; 2188 const struct ieee80211_meshpeer_ie *meshpeer; 2189 uint16_t args[3]; 2190 2191 /* +2+2 for action + code + capabilites */ 2192 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2193 IEEE80211_ACTION_MESHPEERING_OPEN); 2194 if (meshpeer == NULL) { 2195 return 0; 2196 } 2197 2198 /* XXX move up */ 2199 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2200 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2201 2202 switch (ni->ni_mlstate) { 2203 case IEEE80211_NODE_MESH_IDLE: 2204 /* Reject open request if reached our maximum neighbor count */ 2205 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2206 args[0] = meshpeer->peer_llinkid; 2207 args[1] = 0; 2208 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2209 ieee80211_send_action(ni, 2210 IEEE80211_ACTION_CAT_SELF_PROT, 2211 IEEE80211_ACTION_MESHPEERING_CLOSE, 2212 args); 2213 /* stay in IDLE state */ 2214 return (0); 2215 } 2216 /* Open frame accepted */ 2217 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2218 ni->ni_mllid = meshpeer->peer_llinkid; 2219 ni->ni_mlpid = mesh_generateid(vap); 2220 if (ni->ni_mlpid == 0) 2221 return 0; /* XXX */ 2222 args[0] = ni->ni_mlpid; 2223 /* Announce we're open too... */ 2224 ieee80211_send_action(ni, 2225 IEEE80211_ACTION_CAT_SELF_PROT, 2226 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2227 /* ...and confirm the link. */ 2228 args[0] = ni->ni_mlpid; 2229 args[1] = ni->ni_mllid; 2230 ieee80211_send_action(ni, 2231 IEEE80211_ACTION_CAT_SELF_PROT, 2232 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2233 args); 2234 mesh_peer_timeout_setup(ni); 2235 break; 2236 case IEEE80211_NODE_MESH_OPENRCV: 2237 /* Wrong Link ID */ 2238 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2239 args[0] = ni->ni_mllid; 2240 args[1] = ni->ni_mlpid; 2241 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2242 ieee80211_send_action(ni, 2243 IEEE80211_ACTION_CAT_SELF_PROT, 2244 IEEE80211_ACTION_MESHPEERING_CLOSE, 2245 args); 2246 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2247 mesh_peer_timeout_setup(ni); 2248 break; 2249 } 2250 /* Duplicate open, confirm again. */ 2251 args[0] = ni->ni_mlpid; 2252 args[1] = ni->ni_mllid; 2253 ieee80211_send_action(ni, 2254 IEEE80211_ACTION_CAT_SELF_PROT, 2255 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2256 args); 2257 break; 2258 case IEEE80211_NODE_MESH_OPENSNT: 2259 ni->ni_mllid = meshpeer->peer_llinkid; 2260 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2261 args[0] = ni->ni_mlpid; 2262 args[1] = ni->ni_mllid; 2263 ieee80211_send_action(ni, 2264 IEEE80211_ACTION_CAT_SELF_PROT, 2265 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2266 args); 2267 /* NB: don't setup/clear any timeout */ 2268 break; 2269 case IEEE80211_NODE_MESH_CONFIRMRCV: 2270 if (ni->ni_mlpid != meshpeer->peer_linkid || 2271 ni->ni_mllid != meshpeer->peer_llinkid) { 2272 args[0] = ni->ni_mlpid; 2273 args[1] = ni->ni_mllid; 2274 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2275 ieee80211_send_action(ni, 2276 IEEE80211_ACTION_CAT_SELF_PROT, 2277 IEEE80211_ACTION_MESHPEERING_CLOSE, 2278 args); 2279 mesh_linkchange(ni, 2280 IEEE80211_NODE_MESH_HOLDING); 2281 mesh_peer_timeout_setup(ni); 2282 break; 2283 } 2284 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2285 ni->ni_mllid = meshpeer->peer_llinkid; 2286 args[0] = ni->ni_mlpid; 2287 args[1] = ni->ni_mllid; 2288 ieee80211_send_action(ni, 2289 IEEE80211_ACTION_CAT_SELF_PROT, 2290 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2291 args); 2292 mesh_peer_timeout_stop(ni); 2293 break; 2294 case IEEE80211_NODE_MESH_ESTABLISHED: 2295 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2296 args[0] = ni->ni_mllid; 2297 args[1] = ni->ni_mlpid; 2298 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2299 ieee80211_send_action(ni, 2300 IEEE80211_ACTION_CAT_SELF_PROT, 2301 IEEE80211_ACTION_MESHPEERING_CLOSE, 2302 args); 2303 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2304 mesh_peer_timeout_setup(ni); 2305 break; 2306 } 2307 args[0] = ni->ni_mlpid; 2308 args[1] = ni->ni_mllid; 2309 ieee80211_send_action(ni, 2310 IEEE80211_ACTION_CAT_SELF_PROT, 2311 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2312 args); 2313 break; 2314 case IEEE80211_NODE_MESH_HOLDING: 2315 args[0] = ni->ni_mlpid; 2316 args[1] = meshpeer->peer_llinkid; 2317 /* Standard not clear about what the reaason code should be */ 2318 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2319 ieee80211_send_action(ni, 2320 IEEE80211_ACTION_CAT_SELF_PROT, 2321 IEEE80211_ACTION_MESHPEERING_CLOSE, 2322 args); 2323 break; 2324 } 2325 return 0; 2326} 2327 2328static int 2329mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2330 const struct ieee80211_frame *wh, 2331 const uint8_t *frm, const uint8_t *efrm) 2332{ 2333 struct ieee80211vap *vap = ni->ni_vap; 2334 struct ieee80211_meshpeer_ie ie; 2335 const struct ieee80211_meshpeer_ie *meshpeer; 2336 uint16_t args[3]; 2337 2338 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2339 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2340 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2341 if (meshpeer == NULL) { 2342 return 0; 2343 } 2344 2345 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2346 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2347 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2348 2349 switch (ni->ni_mlstate) { 2350 case IEEE80211_NODE_MESH_OPENRCV: 2351 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2352 mesh_peer_timeout_stop(ni); 2353 break; 2354 case IEEE80211_NODE_MESH_OPENSNT: 2355 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2356 mesh_peer_timeout_setup(ni); 2357 break; 2358 case IEEE80211_NODE_MESH_HOLDING: 2359 args[0] = ni->ni_mlpid; 2360 args[1] = meshpeer->peer_llinkid; 2361 /* Standard not clear about what the reaason code should be */ 2362 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2363 ieee80211_send_action(ni, 2364 IEEE80211_ACTION_CAT_SELF_PROT, 2365 IEEE80211_ACTION_MESHPEERING_CLOSE, 2366 args); 2367 break; 2368 case IEEE80211_NODE_MESH_CONFIRMRCV: 2369 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2370 args[0] = ni->ni_mlpid; 2371 args[1] = ni->ni_mllid; 2372 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2373 ieee80211_send_action(ni, 2374 IEEE80211_ACTION_CAT_SELF_PROT, 2375 IEEE80211_ACTION_MESHPEERING_CLOSE, 2376 args); 2377 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2378 mesh_peer_timeout_setup(ni); 2379 } 2380 break; 2381 default: 2382 IEEE80211_DISCARD(vap, 2383 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2384 wh, NULL, "received confirm in invalid state %d", 2385 ni->ni_mlstate); 2386 vap->iv_stats.is_rx_mgtdiscard++; 2387 break; 2388 } 2389 return 0; 2390} 2391 2392static int 2393mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2394 const struct ieee80211_frame *wh, 2395 const uint8_t *frm, const uint8_t *efrm) 2396{ 2397 struct ieee80211_meshpeer_ie ie; 2398 const struct ieee80211_meshpeer_ie *meshpeer; 2399 uint16_t args[3]; 2400 2401 /* +2 for action + code */ 2402 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2403 IEEE80211_ACTION_MESHPEERING_CLOSE); 2404 if (meshpeer == NULL) { 2405 return 0; 2406 } 2407 2408 /* 2409 * XXX: check reason code, for example we could receive 2410 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2411 * to peer again. 2412 */ 2413 2414 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2415 ni, "%s", "recv PEER CLOSE"); 2416 2417 switch (ni->ni_mlstate) { 2418 case IEEE80211_NODE_MESH_IDLE: 2419 /* ignore */ 2420 break; 2421 case IEEE80211_NODE_MESH_OPENRCV: 2422 case IEEE80211_NODE_MESH_OPENSNT: 2423 case IEEE80211_NODE_MESH_CONFIRMRCV: 2424 case IEEE80211_NODE_MESH_ESTABLISHED: 2425 args[0] = ni->ni_mlpid; 2426 args[1] = ni->ni_mllid; 2427 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2428 ieee80211_send_action(ni, 2429 IEEE80211_ACTION_CAT_SELF_PROT, 2430 IEEE80211_ACTION_MESHPEERING_CLOSE, 2431 args); 2432 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2433 mesh_peer_timeout_setup(ni); 2434 break; 2435 case IEEE80211_NODE_MESH_HOLDING: 2436 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2437 mesh_peer_timeout_stop(ni); 2438 break; 2439 } 2440 return 0; 2441} 2442 2443/* 2444 * Link Metric handling. 2445 */ 2446static int 2447mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2448 const struct ieee80211_frame *wh, 2449 const uint8_t *frm, const uint8_t *efrm) 2450{ 2451 const struct ieee80211_meshlmetric_ie *ie = 2452 (const struct ieee80211_meshlmetric_ie *) 2453 (frm+2); /* action + code */ 2454 struct ieee80211_meshlmetric_ie lm_rep; 2455 2456 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2457 lm_rep.lm_flags = 0; 2458 lm_rep.lm_metric = mesh_airtime_calc(ni); 2459 ieee80211_send_action(ni, 2460 IEEE80211_ACTION_CAT_MESH, 2461 IEEE80211_ACTION_MESH_LMETRIC, 2462 &lm_rep); 2463 } 2464 /* XXX: else do nothing for now */ 2465 return 0; 2466} 2467 2468/* 2469 * Mesh Gate Announcement handling. 2470 */ 2471static int 2472mesh_recv_action_meshgate(struct ieee80211_node *ni, 2473 const struct ieee80211_frame *wh, 2474 const uint8_t *frm, const uint8_t *efrm) 2475{ 2476 struct ieee80211vap *vap = ni->ni_vap; 2477 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2478 struct ieee80211_mesh_gate_route *gr, *next; 2479 struct ieee80211_mesh_route *rt_gate; 2480 struct ieee80211_meshgann_ie pgann; 2481 int found = 0; 2482 const struct ieee80211_meshgann_ie *ie = 2483 (const struct ieee80211_meshgann_ie *) 2484 (frm+2); /* action + code */ 2485 2486 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie->gann_addr)) 2487 return 0; 2488 2489 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2490 "received GANN, meshgate: %6D (seq %u)", ie->gann_addr, ":", 2491 ie->gann_seq); 2492 2493 if (ms == NULL) 2494 return (0); 2495 MESH_RT_LOCK(ms); 2496 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2497 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie->gann_addr)) 2498 continue; 2499 if (ie->gann_seq <= gr->gr_lastseq) { 2500 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2501 ni->ni_macaddr, NULL, 2502 "GANN old seqno %u <= %u", 2503 ie->gann_seq, gr->gr_lastseq); 2504 MESH_RT_UNLOCK(ms); 2505 return (0); 2506 } 2507 /* corresponding mesh gate found & GANN accepted */ 2508 found = 1; 2509 break; 2510 2511 } 2512 if (found == 0) { 2513 /* this GANN is from a new mesh Gate add it to known table. */ 2514 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie->gann_addr, 2515 "stored new GANN information, seq %u.", ie->gann_seq); 2516 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2517 M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO); 2518 IEEE80211_ADDR_COPY(gr->gr_addr, ie->gann_addr); 2519 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2520 } 2521 gr->gr_lastseq = ie->gann_seq; 2522 2523 /* check if we have a path to this gate */ 2524 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2525 if (rt_gate != NULL && 2526 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2527 gr->gr_route = rt_gate; 2528 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2529 } 2530 2531 MESH_RT_UNLOCK(ms); 2532 2533 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2534 if ((ie->gann_ttl - 1) < 1 && 2535 !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2536 return 0; 2537 pgann.gann_flags = ie->gann_flags; /* Reserved */ 2538 pgann.gann_hopcount = ie->gann_hopcount + 1; 2539 pgann.gann_ttl = ie->gann_ttl - 1; 2540 IEEE80211_ADDR_COPY(pgann.gann_addr, ie->gann_addr); 2541 pgann.gann_seq = ie->gann_seq; 2542 pgann.gann_interval = ie->gann_interval; 2543 2544 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie->gann_addr, 2545 "%s", "propagate GANN"); 2546 2547 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2548 IEEE80211_ACTION_MESH_GANN, &pgann); 2549 2550 return 0; 2551} 2552 2553static int 2554mesh_send_action(struct ieee80211_node *ni, 2555 const uint8_t sa[IEEE80211_ADDR_LEN], 2556 const uint8_t da[IEEE80211_ADDR_LEN], 2557 struct mbuf *m) 2558{ 2559 struct ieee80211vap *vap = ni->ni_vap; 2560 struct ieee80211com *ic = ni->ni_ic; 2561 struct ieee80211_bpf_params params; 2562 struct ieee80211_frame *wh; 2563 2564 KASSERT(ni != NULL, ("null node")); 2565 2566 if (vap->iv_state == IEEE80211_S_CAC) { 2567 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2568 "block %s frame in CAC state", "Mesh action"); 2569 vap->iv_stats.is_tx_badstate++; 2570 ieee80211_free_node(ni); 2571 m_freem(m); 2572 return EIO; /* XXX */ 2573 } 2574 2575 M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 2576 if (m == NULL) { 2577 ieee80211_free_node(ni); 2578 return ENOMEM; 2579 } 2580 2581 wh = mtod(m, struct ieee80211_frame *); 2582 ieee80211_send_setup(ni, m, 2583 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2584 IEEE80211_NONQOS_TID, sa, da, sa); 2585 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2586 2587 memset(¶ms, 0, sizeof(params)); 2588 params.ibp_pri = WME_AC_VO; 2589 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2590 if (IEEE80211_IS_MULTICAST(da)) 2591 params.ibp_try0 = 1; 2592 else 2593 params.ibp_try0 = ni->ni_txparms->maxretry; 2594 params.ibp_power = ni->ni_txpower; 2595 2596 IEEE80211_NODE_STAT(ni, tx_mgmt); 2597 2598 return ic->ic_raw_xmit(ni, m, ¶ms); 2599} 2600 2601#define ADDSHORT(frm, v) do { \ 2602 frm[0] = (v) & 0xff; \ 2603 frm[1] = (v) >> 8; \ 2604 frm += 2; \ 2605} while (0) 2606#define ADDWORD(frm, v) do { \ 2607 frm[0] = (v) & 0xff; \ 2608 frm[1] = ((v) >> 8) & 0xff; \ 2609 frm[2] = ((v) >> 16) & 0xff; \ 2610 frm[3] = ((v) >> 24) & 0xff; \ 2611 frm += 4; \ 2612} while (0) 2613 2614static int 2615mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2616 int category, int action, void *args0) 2617{ 2618 struct ieee80211vap *vap = ni->ni_vap; 2619 struct ieee80211com *ic = ni->ni_ic; 2620 uint16_t *args = args0; 2621 const struct ieee80211_rateset *rs; 2622 struct mbuf *m; 2623 uint8_t *frm; 2624 2625 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2626 "send PEER OPEN action: localid 0x%x", args[0]); 2627 2628 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2629 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2630 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2631 ieee80211_ref_node(ni); 2632 2633 m = ieee80211_getmgtframe(&frm, 2634 ic->ic_headroom + sizeof(struct ieee80211_frame), 2635 sizeof(uint16_t) /* action+category */ 2636 + sizeof(uint16_t) /* capabilites */ 2637 + 2 + IEEE80211_RATE_SIZE 2638 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2639 + 2 + IEEE80211_MESHID_LEN 2640 + sizeof(struct ieee80211_meshconf_ie) 2641 + sizeof(struct ieee80211_meshpeer_ie) 2642 ); 2643 if (m != NULL) { 2644 /* 2645 * mesh peer open action frame format: 2646 * [1] category 2647 * [1] action 2648 * [2] capabilities 2649 * [tlv] rates 2650 * [tlv] xrates 2651 * [tlv] mesh id 2652 * [tlv] mesh conf 2653 * [tlv] mesh peer link mgmt 2654 */ 2655 *frm++ = category; 2656 *frm++ = action; 2657 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2658 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2659 frm = ieee80211_add_rates(frm, rs); 2660 frm = ieee80211_add_xrates(frm, rs); 2661 frm = ieee80211_add_meshid(frm, vap); 2662 frm = ieee80211_add_meshconf(frm, vap); 2663 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2664 args[0], 0, 0); 2665 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2666 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2667 } else { 2668 vap->iv_stats.is_tx_nobuf++; 2669 ieee80211_free_node(ni); 2670 return ENOMEM; 2671 } 2672} 2673 2674static int 2675mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2676 int category, int action, void *args0) 2677{ 2678 struct ieee80211vap *vap = ni->ni_vap; 2679 struct ieee80211com *ic = ni->ni_ic; 2680 uint16_t *args = args0; 2681 const struct ieee80211_rateset *rs; 2682 struct mbuf *m; 2683 uint8_t *frm; 2684 2685 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2686 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2687 args[0], args[1]); 2688 2689 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2690 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2691 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2692 ieee80211_ref_node(ni); 2693 2694 m = ieee80211_getmgtframe(&frm, 2695 ic->ic_headroom + sizeof(struct ieee80211_frame), 2696 sizeof(uint16_t) /* action+category */ 2697 + sizeof(uint16_t) /* capabilites */ 2698 + sizeof(uint16_t) /* status code */ 2699 + sizeof(uint16_t) /* AID */ 2700 + 2 + IEEE80211_RATE_SIZE 2701 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2702 + 2 + IEEE80211_MESHID_LEN 2703 + sizeof(struct ieee80211_meshconf_ie) 2704 + sizeof(struct ieee80211_meshpeer_ie) 2705 ); 2706 if (m != NULL) { 2707 /* 2708 * mesh peer confirm action frame format: 2709 * [1] category 2710 * [1] action 2711 * [2] capabilities 2712 * [2] status code 2713 * [2] association id (peer ID) 2714 * [tlv] rates 2715 * [tlv] xrates 2716 * [tlv] mesh id 2717 * [tlv] mesh conf 2718 * [tlv] mesh peer link mgmt 2719 */ 2720 *frm++ = category; 2721 *frm++ = action; 2722 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2723 ADDSHORT(frm, 0); /* status code */ 2724 ADDSHORT(frm, args[1]); /* AID */ 2725 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2726 frm = ieee80211_add_rates(frm, rs); 2727 frm = ieee80211_add_xrates(frm, rs); 2728 frm = ieee80211_add_meshid(frm, vap); 2729 frm = ieee80211_add_meshconf(frm, vap); 2730 frm = ieee80211_add_meshpeer(frm, 2731 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2732 args[0], args[1], 0); 2733 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2734 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2735 } else { 2736 vap->iv_stats.is_tx_nobuf++; 2737 ieee80211_free_node(ni); 2738 return ENOMEM; 2739 } 2740} 2741 2742static int 2743mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2744 int category, int action, void *args0) 2745{ 2746 struct ieee80211vap *vap = ni->ni_vap; 2747 struct ieee80211com *ic = ni->ni_ic; 2748 uint16_t *args = args0; 2749 struct mbuf *m; 2750 uint8_t *frm; 2751 2752 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2753 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2754 args[0], args[1], args[2]); 2755 2756 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2757 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2758 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2759 ieee80211_ref_node(ni); 2760 2761 m = ieee80211_getmgtframe(&frm, 2762 ic->ic_headroom + sizeof(struct ieee80211_frame), 2763 sizeof(uint16_t) /* action+category */ 2764 + sizeof(uint16_t) /* reason code */ 2765 + 2 + IEEE80211_MESHID_LEN 2766 + sizeof(struct ieee80211_meshpeer_ie) 2767 ); 2768 if (m != NULL) { 2769 /* 2770 * mesh peer close action frame format: 2771 * [1] category 2772 * [1] action 2773 * [tlv] mesh id 2774 * [tlv] mesh peer link mgmt 2775 */ 2776 *frm++ = category; 2777 *frm++ = action; 2778 frm = ieee80211_add_meshid(frm, vap); 2779 frm = ieee80211_add_meshpeer(frm, 2780 IEEE80211_ACTION_MESHPEERING_CLOSE, 2781 args[0], args[1], args[2]); 2782 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2783 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2784 } else { 2785 vap->iv_stats.is_tx_nobuf++; 2786 ieee80211_free_node(ni); 2787 return ENOMEM; 2788 } 2789} 2790 2791static int 2792mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2793 int category, int action, void *arg0) 2794{ 2795 struct ieee80211vap *vap = ni->ni_vap; 2796 struct ieee80211com *ic = ni->ni_ic; 2797 struct ieee80211_meshlmetric_ie *ie = arg0; 2798 struct mbuf *m; 2799 uint8_t *frm; 2800 2801 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2802 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2803 ni, "%s", "send LINK METRIC REQUEST action"); 2804 } else { 2805 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2806 ni, "send LINK METRIC REPLY action: metric 0x%x", 2807 ie->lm_metric); 2808 } 2809 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2810 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2811 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2812 ieee80211_ref_node(ni); 2813 2814 m = ieee80211_getmgtframe(&frm, 2815 ic->ic_headroom + sizeof(struct ieee80211_frame), 2816 sizeof(uint16_t) + /* action+category */ 2817 sizeof(struct ieee80211_meshlmetric_ie) 2818 ); 2819 if (m != NULL) { 2820 /* 2821 * mesh link metric 2822 * [1] category 2823 * [1] action 2824 * [tlv] mesh link metric 2825 */ 2826 *frm++ = category; 2827 *frm++ = action; 2828 frm = ieee80211_add_meshlmetric(frm, 2829 ie->lm_flags, ie->lm_metric); 2830 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2831 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2832 } else { 2833 vap->iv_stats.is_tx_nobuf++; 2834 ieee80211_free_node(ni); 2835 return ENOMEM; 2836 } 2837} 2838 2839static int 2840mesh_send_action_meshgate(struct ieee80211_node *ni, 2841 int category, int action, void *arg0) 2842{ 2843 struct ieee80211vap *vap = ni->ni_vap; 2844 struct ieee80211com *ic = ni->ni_ic; 2845 struct ieee80211_meshgann_ie *ie = arg0; 2846 struct mbuf *m; 2847 uint8_t *frm; 2848 2849 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2850 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2851 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2852 ieee80211_ref_node(ni); 2853 2854 m = ieee80211_getmgtframe(&frm, 2855 ic->ic_headroom + sizeof(struct ieee80211_frame), 2856 sizeof(uint16_t) + /* action+category */ 2857 IEEE80211_MESHGANN_BASE_SZ 2858 ); 2859 if (m != NULL) { 2860 /* 2861 * mesh link metric 2862 * [1] category 2863 * [1] action 2864 * [tlv] mesh gate annoucement 2865 */ 2866 *frm++ = category; 2867 *frm++ = action; 2868 frm = ieee80211_add_meshgate(frm, ie); 2869 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2870 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 2871 } else { 2872 vap->iv_stats.is_tx_nobuf++; 2873 ieee80211_free_node(ni); 2874 return ENOMEM; 2875 } 2876} 2877 2878static void 2879mesh_peer_timeout_setup(struct ieee80211_node *ni) 2880{ 2881 switch (ni->ni_mlstate) { 2882 case IEEE80211_NODE_MESH_HOLDING: 2883 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 2884 break; 2885 case IEEE80211_NODE_MESH_CONFIRMRCV: 2886 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 2887 break; 2888 case IEEE80211_NODE_MESH_IDLE: 2889 ni->ni_mltval = 0; 2890 break; 2891 default: 2892 ni->ni_mltval = ieee80211_mesh_retrytimeout; 2893 break; 2894 } 2895 if (ni->ni_mltval) 2896 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2897 mesh_peer_timeout_cb, ni); 2898} 2899 2900/* 2901 * Same as above but backoffs timer statisically 50%. 2902 */ 2903static void 2904mesh_peer_timeout_backoff(struct ieee80211_node *ni) 2905{ 2906 uint32_t r; 2907 2908 r = arc4random(); 2909 ni->ni_mltval += r % ni->ni_mltval; 2910 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 2911 ni); 2912} 2913 2914static __inline void 2915mesh_peer_timeout_stop(struct ieee80211_node *ni) 2916{ 2917 callout_drain(&ni->ni_mltimer); 2918} 2919 2920static void 2921mesh_peer_backoff_cb(void *arg) 2922{ 2923 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 2924 2925 /* After backoff timeout, try to peer automatically again. */ 2926 ni->ni_mlhcnt = 0; 2927} 2928 2929/* 2930 * Mesh Peer Link Management FSM timeout handling. 2931 */ 2932static void 2933mesh_peer_timeout_cb(void *arg) 2934{ 2935 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 2936 uint16_t args[3]; 2937 2938 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 2939 ni, "mesh link timeout, state %d, retry counter %d", 2940 ni->ni_mlstate, ni->ni_mlrcnt); 2941 2942 switch (ni->ni_mlstate) { 2943 case IEEE80211_NODE_MESH_IDLE: 2944 case IEEE80211_NODE_MESH_ESTABLISHED: 2945 break; 2946 case IEEE80211_NODE_MESH_OPENSNT: 2947 case IEEE80211_NODE_MESH_OPENRCV: 2948 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 2949 args[0] = ni->ni_mlpid; 2950 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 2951 ieee80211_send_action(ni, 2952 IEEE80211_ACTION_CAT_SELF_PROT, 2953 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2954 ni->ni_mlrcnt = 0; 2955 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2956 mesh_peer_timeout_setup(ni); 2957 } else { 2958 args[0] = ni->ni_mlpid; 2959 ieee80211_send_action(ni, 2960 IEEE80211_ACTION_CAT_SELF_PROT, 2961 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2962 ni->ni_mlrcnt++; 2963 mesh_peer_timeout_backoff(ni); 2964 } 2965 break; 2966 case IEEE80211_NODE_MESH_CONFIRMRCV: 2967 args[0] = ni->ni_mlpid; 2968 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 2969 ieee80211_send_action(ni, 2970 IEEE80211_ACTION_CAT_SELF_PROT, 2971 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2972 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2973 mesh_peer_timeout_setup(ni); 2974 break; 2975 case IEEE80211_NODE_MESH_HOLDING: 2976 ni->ni_mlhcnt++; 2977 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 2978 callout_reset(&ni->ni_mlhtimer, 2979 ieee80211_mesh_backofftimeout, 2980 mesh_peer_backoff_cb, ni); 2981 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2982 break; 2983 } 2984} 2985 2986static int 2987mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 2988{ 2989 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2990 2991 if (ie == NULL || ie[1] != ms->ms_idlen) 2992 return 1; 2993 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 2994} 2995 2996/* 2997 * Check if we are using the same algorithms for this mesh. 2998 */ 2999static int 3000mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3001{ 3002 const struct ieee80211_meshconf_ie *meshconf = 3003 (const struct ieee80211_meshconf_ie *) ie; 3004 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3005 3006 if (meshconf == NULL) 3007 return 1; 3008 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3009 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3010 "unknown path selection algorithm: 0x%x\n", 3011 meshconf->conf_pselid); 3012 return 1; 3013 } 3014 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3015 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3016 "unknown path metric algorithm: 0x%x\n", 3017 meshconf->conf_pmetid); 3018 return 1; 3019 } 3020 if (meshconf->conf_ccid != 0) { 3021 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3022 "unknown congestion control algorithm: 0x%x\n", 3023 meshconf->conf_ccid); 3024 return 1; 3025 } 3026 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3027 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3028 "unknown sync algorithm: 0x%x\n", 3029 meshconf->conf_syncid); 3030 return 1; 3031 } 3032 if (meshconf->conf_authid != 0) { 3033 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3034 "unknown auth auth algorithm: 0x%x\n", 3035 meshconf->conf_pselid); 3036 return 1; 3037 } 3038 /* Not accepting peers */ 3039 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3040 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3041 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3042 return 1; 3043 } 3044 return 0; 3045} 3046 3047static int 3048mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3049 const uint8_t *ie) 3050{ 3051 const struct ieee80211_meshpeer_ie *meshpeer = 3052 (const struct ieee80211_meshpeer_ie *) ie; 3053 3054 if (meshpeer == NULL || 3055 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3056 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3057 return 1; 3058 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3059 IEEE80211_DPRINTF(vap, 3060 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3061 "Only MPM protocol is supported (proto: 0x%02X)", 3062 meshpeer->peer_proto); 3063 return 1; 3064 } 3065 switch (subtype) { 3066 case IEEE80211_ACTION_MESHPEERING_OPEN: 3067 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3068 return 1; 3069 break; 3070 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3071 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3072 return 1; 3073 break; 3074 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3075 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3076 return 1; 3077 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3078 meshpeer->peer_linkid != 0) 3079 return 1; 3080 if (meshpeer->peer_rcode == 0) 3081 return 1; 3082 break; 3083 } 3084 return 0; 3085} 3086 3087/* 3088 * Add a Mesh ID IE to a frame. 3089 */ 3090uint8_t * 3091ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3092{ 3093 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3094 3095 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3096 3097 *frm++ = IEEE80211_ELEMID_MESHID; 3098 *frm++ = ms->ms_idlen; 3099 memcpy(frm, ms->ms_id, ms->ms_idlen); 3100 return frm + ms->ms_idlen; 3101} 3102 3103/* 3104 * Add a Mesh Configuration IE to a frame. 3105 * For now just use HWMP routing, Airtime link metric, Null Congestion 3106 * Signaling, Null Sync Protocol and Null Authentication. 3107 */ 3108uint8_t * 3109ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3110{ 3111 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3112 uint16_t caps; 3113 3114 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3115 3116 *frm++ = IEEE80211_ELEMID_MESHCONF; 3117 *frm++ = IEEE80211_MESH_CONF_SZ; 3118 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3119 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3120 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3121 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3122 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3123 /* NB: set the number of neighbors before the rest */ 3124 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3125 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3126 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3127 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3128 frm += 1; 3129 caps = 0; 3130 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3131 caps |= IEEE80211_MESHCONF_CAP_AP; 3132 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3133 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3134 *frm++ = caps; 3135 return frm; 3136} 3137 3138/* 3139 * Add a Mesh Peer Management IE to a frame. 3140 */ 3141uint8_t * 3142ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3143 uint16_t peerid, uint16_t reason) 3144{ 3145 3146 KASSERT(localid != 0, ("localid == 0")); 3147 3148 *frm++ = IEEE80211_ELEMID_MESHPEER; 3149 switch (subtype) { 3150 case IEEE80211_ACTION_MESHPEERING_OPEN: 3151 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3152 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3153 ADDSHORT(frm, localid); /* local ID */ 3154 break; 3155 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3156 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3157 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3158 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3159 ADDSHORT(frm, localid); /* local ID */ 3160 ADDSHORT(frm, peerid); /* peer ID */ 3161 break; 3162 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3163 if (peerid) 3164 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3165 else 3166 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3167 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3168 ADDSHORT(frm, localid); /* local ID */ 3169 if (peerid) 3170 ADDSHORT(frm, peerid); /* peer ID */ 3171 ADDSHORT(frm, reason); 3172 break; 3173 } 3174 return frm; 3175} 3176 3177/* 3178 * Compute an Airtime Link Metric for the link with this node. 3179 * 3180 * Based on Draft 3.0 spec (11B.10, p.149). 3181 */ 3182/* 3183 * Max 802.11s overhead. 3184 */ 3185#define IEEE80211_MESH_MAXOVERHEAD \ 3186 (sizeof(struct ieee80211_qosframe_addr4) \ 3187 + sizeof(struct ieee80211_meshcntl_ae10) \ 3188 + sizeof(struct llc) \ 3189 + IEEE80211_ADDR_LEN \ 3190 + IEEE80211_WEP_IVLEN \ 3191 + IEEE80211_WEP_KIDLEN \ 3192 + IEEE80211_WEP_CRCLEN \ 3193 + IEEE80211_WEP_MICLEN \ 3194 + IEEE80211_CRC_LEN) 3195uint32_t 3196mesh_airtime_calc(struct ieee80211_node *ni) 3197{ 3198#define M_BITS 8 3199#define S_FACTOR (2 * M_BITS) 3200 struct ieee80211com *ic = ni->ni_ic; 3201 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3202 const static int nbits = 8192 << M_BITS; 3203 uint32_t overhead, rate, errrate; 3204 uint64_t res; 3205 3206 /* Time to transmit a frame */ 3207 rate = ni->ni_txrate; 3208 overhead = ieee80211_compute_duration(ic->ic_rt, 3209 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3210 /* Error rate in percentage */ 3211 /* XXX assuming small failures are ok */ 3212 errrate = (((ifp->if_oerrors + 3213 ifp->if_ierrors) / 100) << M_BITS) / 100; 3214 res = (overhead + (nbits / rate)) * 3215 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3216 3217 return (uint32_t)(res >> S_FACTOR); 3218#undef M_BITS 3219#undef S_FACTOR 3220} 3221 3222/* 3223 * Add a Mesh Link Metric report IE to a frame. 3224 */ 3225uint8_t * 3226ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3227{ 3228 *frm++ = IEEE80211_ELEMID_MESHLINK; 3229 *frm++ = 5; 3230 *frm++ = flags; 3231 ADDWORD(frm, metric); 3232 return frm; 3233} 3234 3235/* 3236 * Add a Mesh Gate Announcement IE to a frame. 3237 */ 3238uint8_t * 3239ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3240{ 3241 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3242 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3243 *frm++ = ie->gann_flags; 3244 *frm++ = ie->gann_hopcount; 3245 *frm++ = ie->gann_ttl; 3246 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3247 frm += 6; 3248 ADDWORD(frm, ie->gann_seq); 3249 ADDSHORT(frm, ie->gann_interval); 3250 return frm; 3251} 3252#undef ADDSHORT 3253#undef ADDWORD 3254 3255/* 3256 * Initialize any mesh-specific node state. 3257 */ 3258void 3259ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3260{ 3261 ni->ni_flags |= IEEE80211_NODE_QOS; 3262 callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE); 3263 callout_init(&ni->ni_mlhtimer, CALLOUT_MPSAFE); 3264} 3265 3266/* 3267 * Cleanup any mesh-specific node state. 3268 */ 3269void 3270ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3271{ 3272 struct ieee80211vap *vap = ni->ni_vap; 3273 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3274 3275 callout_drain(&ni->ni_mltimer); 3276 callout_drain(&ni->ni_mlhtimer); 3277 /* NB: short-circuit callbacks after mesh_vdetach */ 3278 if (vap->iv_mesh != NULL) 3279 ms->ms_ppath->mpp_peerdown(ni); 3280} 3281 3282void 3283ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3284{ 3285 ni->ni_meshidlen = ie[1]; 3286 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3287} 3288 3289/* 3290 * Setup mesh-specific node state on neighbor discovery. 3291 */ 3292void 3293ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3294 const struct ieee80211_frame *wh, 3295 const struct ieee80211_scanparams *sp) 3296{ 3297 ieee80211_parse_meshid(ni, sp->meshid); 3298} 3299 3300void 3301ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3302 struct ieee80211_beacon_offsets *bo) 3303{ 3304 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3305 3306 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3307 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3308 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3309 } 3310} 3311 3312static int 3313mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3314{ 3315 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3316 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3317 struct ieee80211_mesh_route *rt; 3318 struct ieee80211req_mesh_route *imr; 3319 size_t len, off; 3320 uint8_t *p; 3321 int error; 3322 3323 if (vap->iv_opmode != IEEE80211_M_MBSS) 3324 return ENOSYS; 3325 3326 error = 0; 3327 switch (ireq->i_type) { 3328 case IEEE80211_IOC_MESH_ID: 3329 ireq->i_len = ms->ms_idlen; 3330 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3331 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3332 break; 3333 case IEEE80211_IOC_MESH_AP: 3334 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3335 break; 3336 case IEEE80211_IOC_MESH_FWRD: 3337 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3338 break; 3339 case IEEE80211_IOC_MESH_GATE: 3340 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3341 break; 3342 case IEEE80211_IOC_MESH_TTL: 3343 ireq->i_val = ms->ms_ttl; 3344 break; 3345 case IEEE80211_IOC_MESH_RTCMD: 3346 switch (ireq->i_val) { 3347 case IEEE80211_MESH_RTCMD_LIST: 3348 len = 0; 3349 MESH_RT_LOCK(ms); 3350 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3351 len += sizeof(*imr); 3352 } 3353 MESH_RT_UNLOCK(ms); 3354 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3355 ireq->i_len = len; 3356 return ENOMEM; 3357 } 3358 ireq->i_len = len; 3359 /* XXX M_WAIT? */ 3360 p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO); 3361 if (p == NULL) 3362 return ENOMEM; 3363 off = 0; 3364 MESH_RT_LOCK(ms); 3365 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3366 if (off >= len) 3367 break; 3368 imr = (struct ieee80211req_mesh_route *) 3369 (p + off); 3370 IEEE80211_ADDR_COPY(imr->imr_dest, 3371 rt->rt_dest); 3372 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3373 rt->rt_nexthop); 3374 imr->imr_metric = rt->rt_metric; 3375 imr->imr_nhops = rt->rt_nhops; 3376 imr->imr_lifetime = 3377 ieee80211_mesh_rt_update(rt, 0); 3378 imr->imr_lastmseq = rt->rt_lastmseq; 3379 imr->imr_flags = rt->rt_flags; /* last */ 3380 off += sizeof(*imr); 3381 } 3382 MESH_RT_UNLOCK(ms); 3383 error = copyout(p, (uint8_t *)ireq->i_data, 3384 ireq->i_len); 3385 free(p, M_TEMP); 3386 break; 3387 case IEEE80211_MESH_RTCMD_FLUSH: 3388 case IEEE80211_MESH_RTCMD_ADD: 3389 case IEEE80211_MESH_RTCMD_DELETE: 3390 return EINVAL; 3391 default: 3392 return ENOSYS; 3393 } 3394 break; 3395 case IEEE80211_IOC_MESH_PR_METRIC: 3396 len = strlen(ms->ms_pmetric->mpm_descr); 3397 if (ireq->i_len < len) 3398 return EINVAL; 3399 ireq->i_len = len; 3400 error = copyout(ms->ms_pmetric->mpm_descr, 3401 (uint8_t *)ireq->i_data, len); 3402 break; 3403 case IEEE80211_IOC_MESH_PR_PATH: 3404 len = strlen(ms->ms_ppath->mpp_descr); 3405 if (ireq->i_len < len) 3406 return EINVAL; 3407 ireq->i_len = len; 3408 error = copyout(ms->ms_ppath->mpp_descr, 3409 (uint8_t *)ireq->i_data, len); 3410 break; 3411 default: 3412 return ENOSYS; 3413 } 3414 3415 return error; 3416} 3417IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3418 3419static int 3420mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3421{ 3422 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3423 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3424 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3425 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3426 int error; 3427 3428 if (vap->iv_opmode != IEEE80211_M_MBSS) 3429 return ENOSYS; 3430 3431 error = 0; 3432 switch (ireq->i_type) { 3433 case IEEE80211_IOC_MESH_ID: 3434 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3435 return EINVAL; 3436 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3437 if (error != 0) 3438 break; 3439 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3440 ms->ms_idlen = ireq->i_len; 3441 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3442 error = ENETRESET; 3443 break; 3444 case IEEE80211_IOC_MESH_AP: 3445 if (ireq->i_val) 3446 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3447 else 3448 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3449 error = ENETRESET; 3450 break; 3451 case IEEE80211_IOC_MESH_FWRD: 3452 if (ireq->i_val) 3453 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3454 else 3455 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3456 mesh_gatemode_setup(vap); 3457 break; 3458 case IEEE80211_IOC_MESH_GATE: 3459 if (ireq->i_val) 3460 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3461 else 3462 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3463 break; 3464 case IEEE80211_IOC_MESH_TTL: 3465 ms->ms_ttl = (uint8_t) ireq->i_val; 3466 break; 3467 case IEEE80211_IOC_MESH_RTCMD: 3468 switch (ireq->i_val) { 3469 case IEEE80211_MESH_RTCMD_LIST: 3470 return EINVAL; 3471 case IEEE80211_MESH_RTCMD_FLUSH: 3472 ieee80211_mesh_rt_flush(vap); 3473 break; 3474 case IEEE80211_MESH_RTCMD_ADD: 3475 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3476 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3477 return EINVAL; 3478 error = copyin(ireq->i_data, &tmpaddr, 3479 IEEE80211_ADDR_LEN); 3480 if (error == 0) 3481 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3482 break; 3483 case IEEE80211_MESH_RTCMD_DELETE: 3484 ieee80211_mesh_rt_del(vap, ireq->i_data); 3485 break; 3486 default: 3487 return ENOSYS; 3488 } 3489 break; 3490 case IEEE80211_IOC_MESH_PR_METRIC: 3491 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3492 if (error == 0) { 3493 error = mesh_select_proto_metric(vap, tmpproto); 3494 if (error == 0) 3495 error = ENETRESET; 3496 } 3497 break; 3498 case IEEE80211_IOC_MESH_PR_PATH: 3499 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3500 if (error == 0) { 3501 error = mesh_select_proto_path(vap, tmpproto); 3502 if (error == 0) 3503 error = ENETRESET; 3504 } 3505 break; 3506 default: 3507 return ENOSYS; 3508 } 3509 return error; 3510} 3511IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3512