ieee80211_mesh.c revision 246511
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 246511 2013-02-07 21:26:06Z monthadar $"); 32#endif 33 34/* 35 * IEEE 802.11s Mesh Point (MBSS) support. 36 * 37 * Based on March 2009, D3.0 802.11s draft spec. 38 */ 39#include "opt_inet.h" 40#include "opt_wlan.h" 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/mbuf.h> 45#include <sys/malloc.h> 46#include <sys/kernel.h> 47 48#include <sys/socket.h> 49#include <sys/sockio.h> 50#include <sys/endian.h> 51#include <sys/errno.h> 52#include <sys/proc.h> 53#include <sys/sysctl.h> 54 55#include <net/bpf.h> 56#include <net/if.h> 57#include <net/if_media.h> 58#include <net/if_llc.h> 59#include <net/ethernet.h> 60 61#include <net80211/ieee80211_var.h> 62#include <net80211/ieee80211_action.h> 63#include <net80211/ieee80211_input.h> 64#include <net80211/ieee80211_mesh.h> 65 66static void mesh_rt_flush_invalid(struct ieee80211vap *); 67static int mesh_select_proto_path(struct ieee80211vap *, const char *); 68static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 69static void mesh_vattach(struct ieee80211vap *); 70static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 71static void mesh_rt_cleanup_cb(void *); 72static void mesh_gatemode_setup(struct ieee80211vap *); 73static void mesh_gatemode_cb(void *); 74static void mesh_linkchange(struct ieee80211_node *, 75 enum ieee80211_mesh_mlstate); 76static void mesh_checkid(void *, struct ieee80211_node *); 77static uint32_t mesh_generateid(struct ieee80211vap *); 78static int mesh_checkpseq(struct ieee80211vap *, 79 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 80static struct ieee80211_node * 81 mesh_find_txnode(struct ieee80211vap *, 82 const uint8_t [IEEE80211_ADDR_LEN]); 83static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, 84 struct ieee80211_mesh_route *); 85static void mesh_forward(struct ieee80211vap *, struct mbuf *, 86 const struct ieee80211_meshcntl *); 87static int mesh_input(struct ieee80211_node *, struct mbuf *, int, int); 88static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 89 int, int); 90static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 91static void mesh_peer_timeout_setup(struct ieee80211_node *); 92static void mesh_peer_timeout_backoff(struct ieee80211_node *); 93static void mesh_peer_timeout_cb(void *); 94static __inline void 95 mesh_peer_timeout_stop(struct ieee80211_node *); 96static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 97static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 98static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 99 const uint8_t *); 100uint32_t mesh_airtime_calc(struct ieee80211_node *); 101 102/* 103 * Timeout values come from the specification and are in milliseconds. 104 */ 105static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 106 "IEEE 802.11s parameters"); 107static int ieee80211_mesh_gateint = -1; 108SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW, 109 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 110 "mesh gate interval (ms)"); 111static int ieee80211_mesh_retrytimeout = -1; 112SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, 113 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 114 "Retry timeout (msec)"); 115static int ieee80211_mesh_holdingtimeout = -1; 116SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, 117 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 118 "Holding state timeout (msec)"); 119static int ieee80211_mesh_confirmtimeout = -1; 120SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, 121 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 122 "Confirm state timeout (msec)"); 123static int ieee80211_mesh_backofftimeout = -1; 124SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW, 125 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 126 "Backoff timeout (msec). This is to throutles peering forever when " 127 "not receving answer or is rejected by a neighbor"); 128static int ieee80211_mesh_maxretries = 2; 129SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW, 130 &ieee80211_mesh_maxretries, 0, 131 "Maximum retries during peer link establishment"); 132static int ieee80211_mesh_maxholding = 2; 133SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLTYPE_INT | CTLFLAG_RW, 134 &ieee80211_mesh_maxholding, 0, 135 "Maximum times we are allowed to transition to HOLDING state before " 136 "backinoff during peer link establishment"); 137 138static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 139 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 140 141static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 142static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 143static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 144static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 145static ieee80211_recv_action_func mesh_recv_action_meshgate; 146 147static ieee80211_send_action_func mesh_send_action_meshpeering_open; 148static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 149static ieee80211_send_action_func mesh_send_action_meshpeering_close; 150static ieee80211_send_action_func mesh_send_action_meshlmetric; 151static ieee80211_send_action_func mesh_send_action_meshgate; 152 153static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 154 .mpm_descr = "AIRTIME", 155 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 156 .mpm_metric = mesh_airtime_calc, 157}; 158 159static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 160static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 161 162#define RT_ENTRY_LOCK(rt) mtx_lock(&(rt)->rt_lock) 163#define RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED) 164#define RT_ENTRY_UNLOCK(rt) mtx_unlock(&(rt)->rt_lock) 165 166#define MESH_RT_LOCK(ms) mtx_lock(&(ms)->ms_rt_lock) 167#define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED) 168#define MESH_RT_UNLOCK(ms) mtx_unlock(&(ms)->ms_rt_lock) 169 170MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 171MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 172MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 173 174/* The longer one of the lifetime should be stored as new lifetime */ 175#define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 176 177MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 178MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 179 180/* 181 * Helper functions to manipulate the Mesh routing table. 182 */ 183 184static struct ieee80211_mesh_route * 185mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 186 const uint8_t dest[IEEE80211_ADDR_LEN]) 187{ 188 struct ieee80211_mesh_route *rt; 189 190 MESH_RT_LOCK_ASSERT(ms); 191 192 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 193 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 194 return rt; 195 } 196 return NULL; 197} 198 199static struct ieee80211_mesh_route * 200mesh_rt_add_locked(struct ieee80211vap *vap, 201 const uint8_t dest[IEEE80211_ADDR_LEN]) 202{ 203 struct ieee80211_mesh_state *ms = vap->iv_mesh; 204 struct ieee80211_mesh_route *rt; 205 206 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 207 ("%s: adding broadcast to the routing table", __func__)); 208 209 MESH_RT_LOCK_ASSERT(ms); 210 211 rt = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) + 212 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | M_ZERO); 213 if (rt != NULL) { 214 rt->rt_vap = vap; 215 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 216 rt->rt_priv = (void *)ALIGN(&rt[1]); 217 mtx_init(&rt->rt_lock, "MBSS_RT", "802.11s route entry", MTX_DEF); 218 callout_init(&rt->rt_discovery, CALLOUT_MPSAFE); 219 rt->rt_updtime = ticks; /* create time */ 220 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 221 } 222 return rt; 223} 224 225struct ieee80211_mesh_route * 226ieee80211_mesh_rt_find(struct ieee80211vap *vap, 227 const uint8_t dest[IEEE80211_ADDR_LEN]) 228{ 229 struct ieee80211_mesh_state *ms = vap->iv_mesh; 230 struct ieee80211_mesh_route *rt; 231 232 MESH_RT_LOCK(ms); 233 rt = mesh_rt_find_locked(ms, dest); 234 MESH_RT_UNLOCK(ms); 235 return rt; 236} 237 238struct ieee80211_mesh_route * 239ieee80211_mesh_rt_add(struct ieee80211vap *vap, 240 const uint8_t dest[IEEE80211_ADDR_LEN]) 241{ 242 struct ieee80211_mesh_state *ms = vap->iv_mesh; 243 struct ieee80211_mesh_route *rt; 244 245 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 246 ("%s: duplicate entry in the routing table", __func__)); 247 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 248 ("%s: adding self to the routing table", __func__)); 249 250 MESH_RT_LOCK(ms); 251 rt = mesh_rt_add_locked(vap, dest); 252 MESH_RT_UNLOCK(ms); 253 return rt; 254} 255 256/* 257 * Update the route lifetime and returns the updated lifetime. 258 * If new_lifetime is zero and route is timedout it will be invalidated. 259 * new_lifetime is in msec 260 */ 261int 262ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 263{ 264 int timesince, now; 265 uint32_t lifetime = 0; 266 267 KASSERT(rt != NULL, ("route is NULL")); 268 269 now = ticks; 270 RT_ENTRY_LOCK(rt); 271 272 /* dont clobber a proxy entry gated by us */ 273 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 274 RT_ENTRY_UNLOCK(rt); 275 return rt->rt_lifetime; 276 } 277 278 timesince = ticks_to_msecs(now - rt->rt_updtime); 279 rt->rt_updtime = now; 280 if (timesince >= rt->rt_lifetime) { 281 if (new_lifetime != 0) { 282 rt->rt_lifetime = new_lifetime; 283 } 284 else { 285 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 286 rt->rt_lifetime = 0; 287 } 288 } else { 289 /* update what is left of lifetime */ 290 rt->rt_lifetime = rt->rt_lifetime - timesince; 291 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 292 new_lifetime, rt->rt_lifetime); 293 } 294 lifetime = rt->rt_lifetime; 295 RT_ENTRY_UNLOCK(rt); 296 297 return lifetime; 298} 299 300/* 301 * Add a proxy route (as needed) for the specified destination. 302 */ 303void 304ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 305 const uint8_t dest[IEEE80211_ADDR_LEN]) 306{ 307 struct ieee80211_mesh_state *ms = vap->iv_mesh; 308 struct ieee80211_mesh_route *rt; 309 310 MESH_RT_LOCK(ms); 311 rt = mesh_rt_find_locked(ms, dest); 312 if (rt == NULL) { 313 rt = mesh_rt_add_locked(vap, dest); 314 if (rt == NULL) { 315 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 316 "%s", "unable to add proxy entry"); 317 vap->iv_stats.is_mesh_rtaddfailed++; 318 } else { 319 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 320 "%s", "add proxy entry"); 321 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 322 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 323 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 324 | IEEE80211_MESHRT_FLAGS_PROXY; 325 } 326 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 327 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 328 ("no proxy flag for poxy entry")); 329 struct ieee80211com *ic = vap->iv_ic; 330 /* 331 * Fix existing entry created by received frames from 332 * stations that have some memory of dest. We also 333 * flush any frames held on the staging queue; delivering 334 * them is too much trouble right now. 335 */ 336 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 337 "%s", "fix proxy entry"); 338 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 339 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 340 | IEEE80211_MESHRT_FLAGS_PROXY; 341 /* XXX belongs in hwmp */ 342 ieee80211_ageq_drain_node(&ic->ic_stageq, 343 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 344 /* XXX stat? */ 345 } 346 MESH_RT_UNLOCK(ms); 347} 348 349static __inline void 350mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 351{ 352 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 353 /* 354 * Grab the lock before destroying it, to be sure no one else 355 * is holding the route. 356 */ 357 RT_ENTRY_LOCK(rt); 358 callout_drain(&rt->rt_discovery); 359 mtx_destroy(&rt->rt_lock); 360 free(rt, M_80211_MESH_RT); 361} 362 363void 364ieee80211_mesh_rt_del(struct ieee80211vap *vap, 365 const uint8_t dest[IEEE80211_ADDR_LEN]) 366{ 367 struct ieee80211_mesh_state *ms = vap->iv_mesh; 368 struct ieee80211_mesh_route *rt, *next; 369 370 MESH_RT_LOCK(ms); 371 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 372 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 373 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 374 ms->ms_ppath->mpp_senderror(vap, dest, rt, 375 IEEE80211_REASON_MESH_PERR_NO_PROXY); 376 } else { 377 ms->ms_ppath->mpp_senderror(vap, dest, rt, 378 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 379 } 380 mesh_rt_del(ms, rt); 381 MESH_RT_UNLOCK(ms); 382 return; 383 } 384 } 385 MESH_RT_UNLOCK(ms); 386} 387 388void 389ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 390{ 391 struct ieee80211_mesh_state *ms = vap->iv_mesh; 392 struct ieee80211_mesh_route *rt, *next; 393 394 if (ms == NULL) 395 return; 396 MESH_RT_LOCK(ms); 397 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 398 mesh_rt_del(ms, rt); 399 MESH_RT_UNLOCK(ms); 400} 401 402void 403ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 404 const uint8_t peer[IEEE80211_ADDR_LEN]) 405{ 406 struct ieee80211_mesh_state *ms = vap->iv_mesh; 407 struct ieee80211_mesh_route *rt, *next; 408 409 MESH_RT_LOCK(ms); 410 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 411 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 412 mesh_rt_del(ms, rt); 413 } 414 MESH_RT_UNLOCK(ms); 415} 416 417/* 418 * Flush expired routing entries, i.e. those in invalid state for 419 * some time. 420 */ 421static void 422mesh_rt_flush_invalid(struct ieee80211vap *vap) 423{ 424 struct ieee80211_mesh_state *ms = vap->iv_mesh; 425 struct ieee80211_mesh_route *rt, *next; 426 427 if (ms == NULL) 428 return; 429 MESH_RT_LOCK(ms); 430 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 431 /* Discover paths will be deleted by their own callout */ 432 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 433 continue; 434 ieee80211_mesh_rt_update(rt, 0); 435 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 436 mesh_rt_del(ms, rt); 437 } 438 MESH_RT_UNLOCK(ms); 439} 440 441#define N(a) (sizeof(a) / sizeof(a[0])) 442int 443ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 444{ 445 int i, firstempty = -1; 446 447 for (i = 0; i < N(mesh_proto_paths); i++) { 448 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 449 IEEE80211_MESH_PROTO_DSZ) == 0) 450 return EEXIST; 451 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 452 firstempty = i; 453 } 454 if (firstempty < 0) 455 return ENOSPC; 456 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 457 mesh_proto_paths[firstempty].mpp_active = 1; 458 return 0; 459} 460 461int 462ieee80211_mesh_register_proto_metric(const struct 463 ieee80211_mesh_proto_metric *mpm) 464{ 465 int i, firstempty = -1; 466 467 for (i = 0; i < N(mesh_proto_metrics); i++) { 468 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 469 IEEE80211_MESH_PROTO_DSZ) == 0) 470 return EEXIST; 471 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 472 firstempty = i; 473 } 474 if (firstempty < 0) 475 return ENOSPC; 476 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 477 mesh_proto_metrics[firstempty].mpm_active = 1; 478 return 0; 479} 480 481static int 482mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 483{ 484 struct ieee80211_mesh_state *ms = vap->iv_mesh; 485 int i; 486 487 for (i = 0; i < N(mesh_proto_paths); i++) { 488 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 489 ms->ms_ppath = &mesh_proto_paths[i]; 490 return 0; 491 } 492 } 493 return ENOENT; 494} 495 496static int 497mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 498{ 499 struct ieee80211_mesh_state *ms = vap->iv_mesh; 500 int i; 501 502 for (i = 0; i < N(mesh_proto_metrics); i++) { 503 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 504 ms->ms_pmetric = &mesh_proto_metrics[i]; 505 return 0; 506 } 507 } 508 return ENOENT; 509} 510#undef N 511 512static void 513mesh_gatemode_setup(struct ieee80211vap *vap) 514{ 515 struct ieee80211_mesh_state *ms = vap->iv_mesh; 516 517 /* 518 * NB: When a mesh gate is running as a ROOT it shall 519 * not send out periodic GANNs but instead mark the 520 * mesh gate flag for the corresponding proactive PREQ 521 * and RANN frames. 522 */ 523 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 524 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 525 callout_drain(&ms->ms_gatetimer); 526 return ; 527 } 528 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 529 mesh_gatemode_cb, vap); 530} 531 532static void 533mesh_gatemode_cb(void *arg) 534{ 535 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 536 struct ieee80211_mesh_state *ms = vap->iv_mesh; 537 struct ieee80211_meshgann_ie gann; 538 539 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 540 "%s", "send broadcast GANN"); 541 542 gann.gann_flags = 0; /* Reserved */ 543 gann.gann_hopcount = 0; 544 gann.gann_ttl = ms->ms_ttl; 545 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 546 gann.gann_seq = ms->ms_gateseq++; 547 gann.gann_interval = ieee80211_mesh_gateint; 548 549 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 550 IEEE80211_ACTION_MESH_GANN, &gann); 551 mesh_gatemode_setup(vap); 552} 553 554static void 555ieee80211_mesh_init(void) 556{ 557 558 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 559 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 560 561 /* 562 * Setup mesh parameters that depends on the clock frequency. 563 */ 564 ieee80211_mesh_gateint = msecs_to_ticks(10000); 565 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 566 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 567 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 568 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 569 570 /* 571 * Register action frame handlers. 572 */ 573 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 574 IEEE80211_ACTION_MESHPEERING_OPEN, 575 mesh_recv_action_meshpeering_open); 576 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 577 IEEE80211_ACTION_MESHPEERING_CONFIRM, 578 mesh_recv_action_meshpeering_confirm); 579 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 580 IEEE80211_ACTION_MESHPEERING_CLOSE, 581 mesh_recv_action_meshpeering_close); 582 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 583 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 584 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 585 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 586 587 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 588 IEEE80211_ACTION_MESHPEERING_OPEN, 589 mesh_send_action_meshpeering_open); 590 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 591 IEEE80211_ACTION_MESHPEERING_CONFIRM, 592 mesh_send_action_meshpeering_confirm); 593 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 594 IEEE80211_ACTION_MESHPEERING_CLOSE, 595 mesh_send_action_meshpeering_close); 596 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 597 IEEE80211_ACTION_MESH_LMETRIC, 598 mesh_send_action_meshlmetric); 599 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 600 IEEE80211_ACTION_MESH_GANN, 601 mesh_send_action_meshgate); 602 603 /* 604 * Register Airtime Link Metric. 605 */ 606 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 607 608} 609SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 610 611void 612ieee80211_mesh_attach(struct ieee80211com *ic) 613{ 614 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 615} 616 617void 618ieee80211_mesh_detach(struct ieee80211com *ic) 619{ 620} 621 622static void 623mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 624{ 625 struct ieee80211com *ic = ni->ni_ic; 626 uint16_t args[3]; 627 628 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 629 args[0] = ni->ni_mlpid; 630 args[1] = ni->ni_mllid; 631 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 632 ieee80211_send_action(ni, 633 IEEE80211_ACTION_CAT_SELF_PROT, 634 IEEE80211_ACTION_MESHPEERING_CLOSE, 635 args); 636 } 637 callout_drain(&ni->ni_mltimer); 638 /* XXX belongs in hwmp */ 639 ieee80211_ageq_drain_node(&ic->ic_stageq, 640 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 641} 642 643static void 644mesh_vdetach(struct ieee80211vap *vap) 645{ 646 struct ieee80211_mesh_state *ms = vap->iv_mesh; 647 648 callout_drain(&ms->ms_cleantimer); 649 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 650 NULL); 651 ieee80211_mesh_rt_flush(vap); 652 mtx_destroy(&ms->ms_rt_lock); 653 ms->ms_ppath->mpp_vdetach(vap); 654 free(vap->iv_mesh, M_80211_VAP); 655 vap->iv_mesh = NULL; 656} 657 658static void 659mesh_vattach(struct ieee80211vap *vap) 660{ 661 struct ieee80211_mesh_state *ms; 662 vap->iv_newstate = mesh_newstate; 663 vap->iv_input = mesh_input; 664 vap->iv_opdetach = mesh_vdetach; 665 vap->iv_recv_mgmt = mesh_recv_mgmt; 666 vap->iv_recv_ctl = mesh_recv_ctl; 667 ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 668 M_NOWAIT | M_ZERO); 669 if (ms == NULL) { 670 printf("%s: couldn't alloc MBSS state\n", __func__); 671 return; 672 } 673 vap->iv_mesh = ms; 674 ms->ms_seq = 0; 675 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 676 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 677 TAILQ_INIT(&ms->ms_known_gates); 678 TAILQ_INIT(&ms->ms_routes); 679 mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF); 680 callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE); 681 callout_init(&ms->ms_gatetimer, CALLOUT_MPSAFE); 682 ms->ms_gateseq = 0; 683 mesh_select_proto_metric(vap, "AIRTIME"); 684 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 685 mesh_select_proto_path(vap, "HWMP"); 686 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 687 ms->ms_ppath->mpp_vattach(vap); 688} 689 690/* 691 * IEEE80211_M_MBSS vap state machine handler. 692 */ 693static int 694mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 695{ 696 struct ieee80211_mesh_state *ms = vap->iv_mesh; 697 struct ieee80211com *ic = vap->iv_ic; 698 struct ieee80211_node *ni; 699 enum ieee80211_state ostate; 700 701 IEEE80211_LOCK_ASSERT(ic); 702 703 ostate = vap->iv_state; 704 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 705 __func__, ieee80211_state_name[ostate], 706 ieee80211_state_name[nstate], arg); 707 vap->iv_state = nstate; /* state transition */ 708 if (ostate != IEEE80211_S_SCAN) 709 ieee80211_cancel_scan(vap); /* background scan */ 710 ni = vap->iv_bss; /* NB: no reference held */ 711 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 712 callout_drain(&ms->ms_cleantimer); 713 callout_drain(&ms->ms_gatetimer); 714 } 715 switch (nstate) { 716 case IEEE80211_S_INIT: 717 switch (ostate) { 718 case IEEE80211_S_SCAN: 719 ieee80211_cancel_scan(vap); 720 break; 721 case IEEE80211_S_CAC: 722 ieee80211_dfs_cac_stop(vap); 723 break; 724 case IEEE80211_S_RUN: 725 ieee80211_iterate_nodes(&ic->ic_sta, 726 mesh_vdetach_peers, NULL); 727 break; 728 default: 729 break; 730 } 731 if (ostate != IEEE80211_S_INIT) { 732 /* NB: optimize INIT -> INIT case */ 733 ieee80211_reset_bss(vap); 734 ieee80211_mesh_rt_flush(vap); 735 } 736 break; 737 case IEEE80211_S_SCAN: 738 switch (ostate) { 739 case IEEE80211_S_INIT: 740 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 741 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 742 ms->ms_idlen != 0) { 743 /* 744 * Already have a channel and a mesh ID; bypass 745 * the scan and startup immediately. 746 */ 747 ieee80211_create_ibss(vap, vap->iv_des_chan); 748 break; 749 } 750 /* 751 * Initiate a scan. We can come here as a result 752 * of an IEEE80211_IOC_SCAN_REQ too in which case 753 * the vap will be marked with IEEE80211_FEXT_SCANREQ 754 * and the scan request parameters will be present 755 * in iv_scanreq. Otherwise we do the default. 756 */ 757 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 758 ieee80211_check_scan(vap, 759 vap->iv_scanreq_flags, 760 vap->iv_scanreq_duration, 761 vap->iv_scanreq_mindwell, 762 vap->iv_scanreq_maxdwell, 763 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 764 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 765 } else 766 ieee80211_check_scan_current(vap); 767 break; 768 default: 769 break; 770 } 771 break; 772 case IEEE80211_S_CAC: 773 /* 774 * Start CAC on a DFS channel. We come here when starting 775 * a bss on a DFS channel (see ieee80211_create_ibss). 776 */ 777 ieee80211_dfs_cac_start(vap); 778 break; 779 case IEEE80211_S_RUN: 780 switch (ostate) { 781 case IEEE80211_S_INIT: 782 /* 783 * Already have a channel; bypass the 784 * scan and startup immediately. 785 * Note that ieee80211_create_ibss will call 786 * back to do a RUN->RUN state change. 787 */ 788 ieee80211_create_ibss(vap, 789 ieee80211_ht_adjust_channel(ic, 790 ic->ic_curchan, vap->iv_flags_ht)); 791 /* NB: iv_bss is changed on return */ 792 break; 793 case IEEE80211_S_CAC: 794 /* 795 * NB: This is the normal state change when CAC 796 * expires and no radar was detected; no need to 797 * clear the CAC timer as it's already expired. 798 */ 799 /* fall thru... */ 800 case IEEE80211_S_CSA: 801#if 0 802 /* 803 * Shorten inactivity timer of associated stations 804 * to weed out sta's that don't follow a CSA. 805 */ 806 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 807#endif 808 /* 809 * Update bss node channel to reflect where 810 * we landed after CSA. 811 */ 812 ieee80211_node_set_chan(vap->iv_bss, 813 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 814 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 815 /* XXX bypass debug msgs */ 816 break; 817 case IEEE80211_S_SCAN: 818 case IEEE80211_S_RUN: 819#ifdef IEEE80211_DEBUG 820 if (ieee80211_msg_debug(vap)) { 821 struct ieee80211_node *ni = vap->iv_bss; 822 ieee80211_note(vap, 823 "synchronized with %s meshid ", 824 ether_sprintf(ni->ni_meshid)); 825 ieee80211_print_essid(ni->ni_meshid, 826 ni->ni_meshidlen); 827 /* XXX MCS/HT */ 828 printf(" channel %d\n", 829 ieee80211_chan2ieee(ic, ic->ic_curchan)); 830 } 831#endif 832 break; 833 default: 834 break; 835 } 836 ieee80211_node_authorize(vap->iv_bss); 837 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 838 mesh_rt_cleanup_cb, vap); 839 mesh_gatemode_setup(vap); 840 break; 841 default: 842 break; 843 } 844 /* NB: ostate not nstate */ 845 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 846 return 0; 847} 848 849static void 850mesh_rt_cleanup_cb(void *arg) 851{ 852 struct ieee80211vap *vap = arg; 853 struct ieee80211_mesh_state *ms = vap->iv_mesh; 854 855 mesh_rt_flush_invalid(vap); 856 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 857 mesh_rt_cleanup_cb, vap); 858} 859 860/* 861 * Mark a mesh STA as gate and return a pointer to it. 862 * If this is first time, we create a new gate route. 863 * Always update the path route to this mesh gate. 864 */ 865struct ieee80211_mesh_gate_route * 866ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 867 struct ieee80211_mesh_route *rt) 868{ 869 struct ieee80211_mesh_state *ms = vap->iv_mesh; 870 struct ieee80211_mesh_gate_route *gr = NULL, *next; 871 int found = 0; 872 873 MESH_RT_LOCK(ms); 874 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 875 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 876 found = 1; 877 break; 878 } 879 } 880 881 if (!found) { 882 /* New mesh gate add it to known table. */ 883 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 884 "%s", "stored new gate information from pro-PREQ."); 885 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 886 M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO); 887 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 888 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 889 } 890 gr->gr_route = rt; 891 /* TODO: link from path route to gate route */ 892 MESH_RT_UNLOCK(ms); 893 894 return gr; 895} 896 897 898/* 899 * Helper function to note the Mesh Peer Link FSM change. 900 */ 901static void 902mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 903{ 904 struct ieee80211vap *vap = ni->ni_vap; 905 struct ieee80211_mesh_state *ms = vap->iv_mesh; 906#ifdef IEEE80211_DEBUG 907 static const char *meshlinkstates[] = { 908 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 909 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 910 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 911 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 912 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 913 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 914 }; 915#endif 916 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 917 ni, "peer link: %s -> %s", 918 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 919 920 /* track neighbor count */ 921 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 922 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 923 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 924 ms->ms_neighbors++; 925 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 926 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 927 state != IEEE80211_NODE_MESH_ESTABLISHED) { 928 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 929 ms->ms_neighbors--; 930 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 931 } 932 ni->ni_mlstate = state; 933 switch (state) { 934 case IEEE80211_NODE_MESH_HOLDING: 935 ms->ms_ppath->mpp_peerdown(ni); 936 break; 937 case IEEE80211_NODE_MESH_ESTABLISHED: 938 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 939 break; 940 default: 941 break; 942 } 943} 944 945/* 946 * Helper function to generate a unique local ID required for mesh 947 * peer establishment. 948 */ 949static void 950mesh_checkid(void *arg, struct ieee80211_node *ni) 951{ 952 uint16_t *r = arg; 953 954 if (*r == ni->ni_mllid) 955 *(uint16_t *)arg = 0; 956} 957 958static uint32_t 959mesh_generateid(struct ieee80211vap *vap) 960{ 961 int maxiter = 4; 962 uint16_t r; 963 964 do { 965 get_random_bytes(&r, 2); 966 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 967 maxiter--; 968 } while (r == 0 && maxiter > 0); 969 return r; 970} 971 972/* 973 * Verifies if we already received this packet by checking its 974 * sequence number. 975 * Returns 0 if the frame is to be accepted, 1 otherwise. 976 */ 977static int 978mesh_checkpseq(struct ieee80211vap *vap, 979 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 980{ 981 struct ieee80211_mesh_route *rt; 982 983 rt = ieee80211_mesh_rt_find(vap, source); 984 if (rt == NULL) { 985 rt = ieee80211_mesh_rt_add(vap, source); 986 if (rt == NULL) { 987 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 988 "%s", "add mcast route failed"); 989 vap->iv_stats.is_mesh_rtaddfailed++; 990 return 1; 991 } 992 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 993 "add mcast route, mesh seqno %d", seq); 994 rt->rt_lastmseq = seq; 995 return 0; 996 } 997 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 998 return 1; 999 } else { 1000 rt->rt_lastmseq = seq; 1001 return 0; 1002 } 1003} 1004 1005/* 1006 * Iterate the routing table and locate the next hop. 1007 */ 1008static struct ieee80211_node * 1009mesh_find_txnode(struct ieee80211vap *vap, 1010 const uint8_t dest[IEEE80211_ADDR_LEN]) 1011{ 1012 struct ieee80211_mesh_route *rt; 1013 1014 rt = ieee80211_mesh_rt_find(vap, dest); 1015 if (rt == NULL) 1016 return NULL; 1017 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1018 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1019 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1020 /* XXX stat */ 1021 return NULL; 1022 } 1023 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1024 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1025 if (rt == NULL) return NULL; 1026 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1027 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1028 "%s: meshgate !valid, flags 0x%x", __func__, 1029 rt->rt_flags); 1030 /* XXX stat */ 1031 return NULL; 1032 } 1033 } 1034 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1035} 1036 1037static void 1038mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1039 struct ieee80211_mesh_route *rt_gate) 1040{ 1041 struct ifnet *ifp = vap->iv_ifp; 1042 struct ieee80211com *ic = vap->iv_ic; 1043 struct ifnet *parent = ic->ic_ifp; 1044 struct ieee80211_node *ni; 1045 struct ether_header *eh; 1046 int error; 1047 1048 eh = mtod(m, struct ether_header *); 1049 ni = mesh_find_txnode(vap, rt_gate->rt_dest); 1050 if (ni == NULL) { 1051 ifp->if_oerrors++; 1052 m_freem(m); 1053 return; 1054 } 1055 1056 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 1057 (m->m_flags & M_PWR_SAV) == 0) { 1058 /* 1059 * Station in power save mode; pass the frame 1060 * to the 802.11 layer and continue. We'll get 1061 * the frame back when the time is right. 1062 * XXX lose WDS vap linkage? 1063 */ 1064 (void) ieee80211_pwrsave(ni, m); 1065 ieee80211_free_node(ni); 1066 return; 1067 } 1068 1069 /* calculate priority so drivers can find the tx queue */ 1070 if (ieee80211_classify(ni, m)) { 1071 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 1072 eh->ether_dhost, NULL, 1073 "%s", "classification failure"); 1074 vap->iv_stats.is_tx_classify++; 1075 ifp->if_oerrors++; 1076 m_freem(m); 1077 ieee80211_free_node(ni); 1078 return; 1079 } 1080 /* 1081 * Stash the node pointer. Note that we do this after 1082 * any call to ieee80211_dwds_mcast because that code 1083 * uses any existing value for rcvif to identify the 1084 * interface it (might have been) received on. 1085 */ 1086 m->m_pkthdr.rcvif = (void *)ni; 1087 1088 BPF_MTAP(ifp, m); /* 802.3 tx */ 1089 1090 /* 1091 * Check if A-MPDU tx aggregation is setup or if we 1092 * should try to enable it. The sta must be associated 1093 * with HT and A-MPDU enabled for use. When the policy 1094 * routine decides we should enable A-MPDU we issue an 1095 * ADDBA request and wait for a reply. The frame being 1096 * encapsulated will go out w/o using A-MPDU, or possibly 1097 * it might be collected by the driver and held/retransmit. 1098 * The default ic_ampdu_enable routine handles staggering 1099 * ADDBA requests in case the receiver NAK's us or we are 1100 * otherwise unable to establish a BA stream. 1101 */ 1102 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) && 1103 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX) && 1104 (m->m_flags & M_EAPOL) == 0) { 1105 int tid = WME_AC_TO_TID(M_WME_GETAC(m)); 1106 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid]; 1107 1108 ieee80211_txampdu_count_packet(tap); 1109 if (IEEE80211_AMPDU_RUNNING(tap)) { 1110 /* 1111 * Operational, mark frame for aggregation. 1112 * 1113 * XXX do tx aggregation here 1114 */ 1115 m->m_flags |= M_AMPDU_MPDU; 1116 } else if (!IEEE80211_AMPDU_REQUESTED(tap) && 1117 ic->ic_ampdu_enable(ni, tap)) { 1118 /* 1119 * Not negotiated yet, request service. 1120 */ 1121 ieee80211_ampdu_request(ni, tap); 1122 /* XXX hold frame for reply? */ 1123 } 1124 } 1125#ifdef IEEE80211_SUPPORT_SUPERG 1126 else if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF)) { 1127 m = ieee80211_ff_check(ni, m); 1128 if (m == NULL) { 1129 /* NB: any ni ref held on stageq */ 1130 return; 1131 } 1132 } 1133#endif /* IEEE80211_SUPPORT_SUPERG */ 1134 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 1135 /* 1136 * Encapsulate the packet in prep for transmission. 1137 */ 1138 m = ieee80211_encap(vap, ni, m); 1139 if (m == NULL) { 1140 /* NB: stat+msg handled in ieee80211_encap */ 1141 ieee80211_free_node(ni); 1142 return; 1143 } 1144 } 1145 error = parent->if_transmit(parent, m); 1146 if (error != 0) { 1147 m_freem(m); 1148 ieee80211_free_node(ni); 1149 } else { 1150 ifp->if_opackets++; 1151 } 1152 ic->ic_lastdata = ticks; 1153} 1154 1155/* 1156 * Forward the queued frames to known valid mesh gates. 1157 * Assume destination to be outside the MBSS (i.e. proxy entry), 1158 * If no valid mesh gates are known silently discard queued frames. 1159 * After transmitting frames to all known valid mesh gates, this route 1160 * will be marked invalid, and a new path discovery will happen in the hopes 1161 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1162 */ 1163void 1164ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1165 struct ieee80211_mesh_route *rt_dest) 1166{ 1167 struct ieee80211com *ic = vap->iv_ic; 1168 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1169 struct ieee80211_mesh_route *rt_gate; 1170 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1171 struct mbuf *m, *mcopy, *next; 1172 1173 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1174 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1175 1176 /* XXX: send to more than one valid mash gate */ 1177 MESH_RT_LOCK(ms); 1178 1179 m = ieee80211_ageq_remove(&ic->ic_stageq, 1180 (struct ieee80211_node *)(uintptr_t) 1181 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1182 1183 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1184 rt_gate = gr->gr_route; 1185 if (rt_gate == NULL) { 1186 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1187 rt_dest->rt_dest, 1188 "mesh gate with no path %6D", 1189 gr->gr_addr, ":"); 1190 continue; 1191 } 1192 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1193 continue; 1194 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1195 ("route not marked as a mesh gate")); 1196 KASSERT((rt_gate->rt_flags & 1197 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1198 ("found mesh gate that is also marked porxy")); 1199 /* 1200 * convert route to a proxy route gated by the current 1201 * mesh gate, this is needed so encap can built data 1202 * frame with correct address. 1203 */ 1204 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1205 IEEE80211_MESHRT_FLAGS_VALID; 1206 rt_dest->rt_ext_seq = 1; /* random value */ 1207 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1208 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1209 rt_dest->rt_metric = rt_gate->rt_metric; 1210 rt_dest->rt_nhops = rt_gate->rt_nhops; 1211 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1212 MESH_RT_UNLOCK(ms); 1213 /* XXX: lock?? */ 1214 mcopy = m_dup(m, M_NOWAIT); 1215 for (; mcopy != NULL; mcopy = next) { 1216 next = mcopy->m_nextpkt; 1217 mcopy->m_nextpkt = NULL; 1218 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1219 rt_dest->rt_dest, 1220 "flush queued frame %p len %d", mcopy, 1221 mcopy->m_pkthdr.len); 1222 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1223 } 1224 MESH_RT_LOCK(ms); 1225 } 1226 rt_dest->rt_flags = 0; /* Mark invalid */ 1227 m_freem(m); 1228 MESH_RT_UNLOCK(ms); 1229} 1230 1231/* 1232 * Forward the specified frame. 1233 * Decrement the TTL and set TA to our MAC address. 1234 */ 1235static void 1236mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1237 const struct ieee80211_meshcntl *mc) 1238{ 1239 struct ieee80211com *ic = vap->iv_ic; 1240 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1241 struct ifnet *ifp = vap->iv_ifp; 1242 struct ifnet *parent = ic->ic_ifp; 1243 const struct ieee80211_frame *wh = 1244 mtod(m, const struct ieee80211_frame *); 1245 struct mbuf *mcopy; 1246 struct ieee80211_meshcntl *mccopy; 1247 struct ieee80211_frame *whcopy; 1248 struct ieee80211_node *ni; 1249 int err; 1250 1251 /* 1252 * mesh ttl of 1 means we are the last one receving it, 1253 * according to amendment we decrement and then check if 1254 * 0, if so we dont forward. 1255 */ 1256 if (mc->mc_ttl < 1) { 1257 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1258 "%s", "frame not fwd'd, ttl 1"); 1259 vap->iv_stats.is_mesh_fwd_ttl++; 1260 return; 1261 } 1262 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1263 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1264 "%s", "frame not fwd'd, fwding disabled"); 1265 vap->iv_stats.is_mesh_fwd_disabled++; 1266 return; 1267 } 1268 mcopy = m_dup(m, M_NOWAIT); 1269 if (mcopy == NULL) { 1270 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1271 "%s", "frame not fwd'd, cannot dup"); 1272 vap->iv_stats.is_mesh_fwd_nobuf++; 1273 ifp->if_oerrors++; 1274 return; 1275 } 1276 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1277 sizeof(struct ieee80211_meshcntl)); 1278 if (mcopy == NULL) { 1279 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1280 "%s", "frame not fwd'd, too short"); 1281 vap->iv_stats.is_mesh_fwd_tooshort++; 1282 ifp->if_oerrors++; 1283 m_freem(mcopy); 1284 return; 1285 } 1286 whcopy = mtod(mcopy, struct ieee80211_frame *); 1287 mccopy = (struct ieee80211_meshcntl *) 1288 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1289 /* XXX clear other bits? */ 1290 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1291 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1292 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1293 ni = ieee80211_ref_node(vap->iv_bss); 1294 mcopy->m_flags |= M_MCAST; 1295 } else { 1296 ni = mesh_find_txnode(vap, whcopy->i_addr3); 1297 if (ni == NULL) { 1298 /* 1299 * [Optional] any of the following three actions: 1300 * o silently discard 1301 * o trigger a path discovery 1302 * o inform TA that meshDA is unknown. 1303 */ 1304 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1305 "%s", "frame not fwd'd, no path"); 1306 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1307 IEEE80211_REASON_MESH_PERR_NO_FI); 1308 vap->iv_stats.is_mesh_fwd_nopath++; 1309 m_freem(mcopy); 1310 return; 1311 } 1312 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1313 } 1314 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1315 mccopy->mc_ttl--; 1316 1317 /* XXX calculate priority so drivers can find the tx queue */ 1318 M_WME_SETAC(mcopy, WME_AC_BE); 1319 1320 /* XXX do we know m_nextpkt is NULL? */ 1321 mcopy->m_pkthdr.rcvif = (void *) ni; 1322 err = parent->if_transmit(parent, mcopy); 1323 if (err != 0) { 1324 /* NB: IFQ_HANDOFF reclaims mbuf */ 1325 ieee80211_free_node(ni); 1326 } else { 1327 ifp->if_opackets++; 1328 } 1329} 1330 1331static struct mbuf * 1332mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1333{ 1334#define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1335#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1336 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1337 sizeof(struct ieee80211_meshcntl_ae10)]; 1338 const struct ieee80211_qosframe_addr4 *wh; 1339 const struct ieee80211_meshcntl_ae10 *mc; 1340 struct ether_header *eh; 1341 struct llc *llc; 1342 int ae; 1343 1344 if (m->m_len < hdrlen + sizeof(*llc) && 1345 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1346 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1347 "discard data frame: %s", "m_pullup failed"); 1348 vap->iv_stats.is_rx_tooshort++; 1349 return NULL; 1350 } 1351 memcpy(b, mtod(m, caddr_t), hdrlen); 1352 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1353 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1354 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1355 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1356 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1357 1358 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1359 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1360 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1361 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1362 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1363 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1364 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1365 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1366 llc = NULL; 1367 } else { 1368 m_adj(m, hdrlen - sizeof(*eh)); 1369 } 1370 eh = mtod(m, struct ether_header *); 1371 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1372 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1373 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1374 if (ae == IEEE80211_MESH_AE_00) { 1375 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1376 } else if (ae == IEEE80211_MESH_AE_01) { 1377 IEEE80211_ADDR_COPY(eh->ether_shost, 1378 MC01(mc)->mc_addr4); 1379 } else { 1380 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1381 (const struct ieee80211_frame *)wh, NULL, 1382 "bad AE %d", ae); 1383 vap->iv_stats.is_mesh_badae++; 1384 m_freem(m); 1385 return NULL; 1386 } 1387 } else { 1388 if (ae == IEEE80211_MESH_AE_00) { 1389 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1390 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1391 } else if (ae == IEEE80211_MESH_AE_10) { 1392 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1393 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1394 } else { 1395 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1396 (const struct ieee80211_frame *)wh, NULL, 1397 "bad AE %d", ae); 1398 vap->iv_stats.is_mesh_badae++; 1399 m_freem(m); 1400 return NULL; 1401 } 1402 } 1403#ifdef ALIGNED_POINTER 1404 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1405 m = ieee80211_realign(vap, m, sizeof(*eh)); 1406 if (m == NULL) 1407 return NULL; 1408 } 1409#endif /* ALIGNED_POINTER */ 1410 if (llc != NULL) { 1411 eh = mtod(m, struct ether_header *); 1412 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1413 } 1414 return m; 1415#undef WDIR 1416#undef MC01 1417} 1418 1419/* 1420 * Return non-zero if the unicast mesh data frame should be processed 1421 * locally. Frames that are not proxy'd have our address, otherwise 1422 * we need to consult the routing table to look for a proxy entry. 1423 */ 1424static __inline int 1425mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1426 const struct ieee80211_meshcntl *mc) 1427{ 1428 int ae = mc->mc_flags & 3; 1429 1430 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1431 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1432 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1433 ("bad AE %d", ae)); 1434 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1435 const struct ieee80211_meshcntl_ae10 *mc10 = 1436 (const struct ieee80211_meshcntl_ae10 *) mc; 1437 struct ieee80211_mesh_route *rt = 1438 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1439 /* check for proxy route to ourself */ 1440 return (rt != NULL && 1441 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1442 } else /* ucast w/o proxy */ 1443 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1444} 1445 1446/* 1447 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1448 * > 0 means we have forwarded data and no need to process locally 1449 * == 0 means we want to process locally (and we may have forwarded data 1450 * < 0 means there was an error and data should be discarded 1451 */ 1452static int 1453mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1454 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1455{ 1456 struct ieee80211_qosframe_addr4 *qwh; 1457 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1458 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1459 1460 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1461 1462 /* 1463 * TODO: 1464 * o verify addr2 is a legitimate transmitter 1465 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1466 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1467 */ 1468 1469 /* set lifetime of addr3 (meshDA) to initial value */ 1470 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1471 if (rt_meshda == NULL) { 1472 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1473 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1474 /* 1475 * [Optional] any of the following three actions: 1476 * o silently discard [X] 1477 * o trigger a path discovery [ ] 1478 * o inform TA that meshDA is unknown. [ ] 1479 */ 1480 /* XXX: stats */ 1481 return (-1); 1482 } 1483 1484 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1485 ms->ms_ppath->mpp_inact)); 1486 1487 /* set lifetime of addr4 (meshSA) to initial value */ 1488 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1489 KASSERT(rt_meshsa != NULL, ("no route")); 1490 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1491 ms->ms_ppath->mpp_inact)); 1492 1493 mesh_forward(vap, m, mc); 1494 return (1); /* dont process locally */ 1495} 1496 1497/* 1498 * Verifies transmitter, updates lifetime, precursor list and process data 1499 * locally, if data is proxy with AE = 10 it could mean data should go 1500 * on another mesh path or data should be forwarded to the DS. 1501 * 1502 * > 0 means we have forwarded data and no need to process locally 1503 * == 0 means we want to process locally (and we may have forwarded data 1504 * < 0 means there was an error and data should be discarded 1505 */ 1506static int 1507mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1508 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1509{ 1510 struct ieee80211_qosframe_addr4 *qwh; 1511 const struct ieee80211_meshcntl_ae10 *mc10; 1512 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1513 struct ieee80211_mesh_route *rt; 1514 int ae; 1515 1516 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1517 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1518 1519 /* 1520 * TODO: 1521 * o verify addr2 is a legitimate transmitter 1522 * o lifetime of precursor entry is max(init, curr) 1523 */ 1524 1525 /* set lifetime of addr4 (meshSA) to initial value */ 1526 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1527 KASSERT(rt != NULL, ("no route")); 1528 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1529 rt = NULL; 1530 1531 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1532 KASSERT(ae == IEEE80211_MESH_AE_00 || 1533 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1534 if (ae == IEEE80211_MESH_AE_10) { 1535 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1536 return (0); /* process locally */ 1537 } 1538 1539 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1540 if (rt != NULL && 1541 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1542 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1543 /* 1544 * Forward on another mesh-path, according to 1545 * amendment as specified in 9.32.4.1 1546 */ 1547 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1548 mesh_forward(vap, m, 1549 (const struct ieee80211_meshcntl *)mc10); 1550 return (1); /* dont process locally */ 1551 } 1552 /* 1553 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1554 * addressed according to 13.11.3.2. 1555 */ 1556 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1557 "forward frame to DS, SA(%6D) DA(%6D)", 1558 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1559 } 1560 return (0); /* process locally */ 1561} 1562 1563/* 1564 * Try to forward the group addressed data on to other mesh STAs, and 1565 * also to the DS. 1566 * 1567 * > 0 means we have forwarded data and no need to process locally 1568 * == 0 means we want to process locally (and we may have forwarded data 1569 * < 0 means there was an error and data should be discarded 1570 */ 1571static int 1572mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1573 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1574{ 1575#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1576 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1577 1578 mesh_forward(vap, m, mc); 1579 1580 if(mc->mc_ttl > 0) { 1581 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1582 /* 1583 * Forward of MSDUs from the MBSS to DS group addressed 1584 * (according to 13.11.3.2) 1585 * This happens by delivering the packet, and a bridge 1586 * will sent it on another port member. 1587 */ 1588 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1589 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1590 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1591 MC01(mc)->mc_addr4, "%s", 1592 "forward from MBSS to the DS"); 1593 } 1594 } 1595 return (0); /* process locally */ 1596#undef MC01 1597} 1598 1599static int 1600mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 1601{ 1602#define HAS_SEQ(type) ((type & 0x4) == 0) 1603#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1604#define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1605 struct ieee80211vap *vap = ni->ni_vap; 1606 struct ieee80211com *ic = ni->ni_ic; 1607 struct ifnet *ifp = vap->iv_ifp; 1608 struct ieee80211_frame *wh; 1609 const struct ieee80211_meshcntl *mc; 1610 int hdrspace, meshdrlen, need_tap, error; 1611 uint8_t dir, type, subtype, ae; 1612 uint32_t seq; 1613 const uint8_t *addr; 1614 uint8_t qos[2]; 1615 ieee80211_seq rxseq; 1616 1617 KASSERT(ni != NULL, ("null node")); 1618 ni->ni_inact = ni->ni_inact_reload; 1619 1620 need_tap = 1; /* mbuf need to be tapped. */ 1621 type = -1; /* undefined */ 1622 1623 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1624 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1625 ni->ni_macaddr, NULL, 1626 "too short (1): len %u", m->m_pkthdr.len); 1627 vap->iv_stats.is_rx_tooshort++; 1628 goto out; 1629 } 1630 /* 1631 * Bit of a cheat here, we use a pointer for a 3-address 1632 * frame format but don't reference fields past outside 1633 * ieee80211_frame_min w/o first validating the data is 1634 * present. 1635 */ 1636 wh = mtod(m, struct ieee80211_frame *); 1637 1638 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1639 IEEE80211_FC0_VERSION_0) { 1640 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1641 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1642 vap->iv_stats.is_rx_badversion++; 1643 goto err; 1644 } 1645 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1646 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1647 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1648 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1649 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1650 ni->ni_noise = nf; 1651 if (HAS_SEQ(type)) { 1652 uint8_t tid = ieee80211_gettid(wh); 1653 1654 if (IEEE80211_QOS_HAS_SEQ(wh) && 1655 TID_TO_WME_AC(tid) >= WME_AC_VI) 1656 ic->ic_wme.wme_hipri_traffic++; 1657 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1658 if (! ieee80211_check_rxseq(ni, wh)) { 1659 /* duplicate, discard */ 1660 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1661 wh->i_addr1, "duplicate", 1662 "seqno <%u,%u> fragno <%u,%u> tid %u", 1663 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1664 ni->ni_rxseqs[tid] >> 1665 IEEE80211_SEQ_SEQ_SHIFT, 1666 rxseq & IEEE80211_SEQ_FRAG_MASK, 1667 ni->ni_rxseqs[tid] & 1668 IEEE80211_SEQ_FRAG_MASK, 1669 tid); 1670 vap->iv_stats.is_rx_dup++; 1671 IEEE80211_NODE_STAT(ni, rx_dup); 1672 goto out; 1673 } 1674 ni->ni_rxseqs[tid] = rxseq; 1675 } 1676 } 1677#ifdef IEEE80211_DEBUG 1678 /* 1679 * It's easier, but too expensive, to simulate different mesh 1680 * topologies by consulting the ACL policy very early, so do this 1681 * only under DEBUG. 1682 * 1683 * NB: this check is also done upon peering link initiation. 1684 */ 1685 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1686 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1687 wh, NULL, "%s", "disallowed by ACL"); 1688 vap->iv_stats.is_rx_acl++; 1689 goto out; 1690 } 1691#endif 1692 switch (type) { 1693 case IEEE80211_FC0_TYPE_DATA: 1694 if (ni == vap->iv_bss) 1695 goto out; 1696 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1697 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1698 ni->ni_macaddr, NULL, 1699 "peer link not yet established (%d)", 1700 ni->ni_mlstate); 1701 vap->iv_stats.is_mesh_nolink++; 1702 goto out; 1703 } 1704 if (dir != IEEE80211_FC1_DIR_FROMDS && 1705 dir != IEEE80211_FC1_DIR_DSTODS) { 1706 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1707 wh, "data", "incorrect dir 0x%x", dir); 1708 vap->iv_stats.is_rx_wrongdir++; 1709 goto err; 1710 } 1711 1712 /* All Mesh data frames are QoS subtype */ 1713 if (!HAS_SEQ(type)) { 1714 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1715 wh, "data", "incorrect subtype 0x%x", subtype); 1716 vap->iv_stats.is_rx_badsubtype++; 1717 goto err; 1718 } 1719 1720 /* 1721 * Next up, any fragmentation. 1722 * XXX: we defrag before we even try to forward, 1723 * Mesh Control field is not present in sub-sequent 1724 * fragmented frames. This is in contrast to Draft 4.0. 1725 */ 1726 hdrspace = ieee80211_hdrspace(ic, wh); 1727 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1728 m = ieee80211_defrag(ni, m, hdrspace); 1729 if (m == NULL) { 1730 /* Fragment dropped or frame not complete yet */ 1731 goto out; 1732 } 1733 } 1734 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1735 1736 /* 1737 * Now we have a complete Mesh Data frame. 1738 */ 1739 1740 /* 1741 * Only fromDStoDS data frames use 4 address qos frames 1742 * as specified in amendment. Otherwise addr4 is located 1743 * in the Mesh Control field and a 3 address qos frame 1744 * is used. 1745 */ 1746 if (IEEE80211_IS_DSTODS(wh)) 1747 *(uint16_t *)qos = *(uint16_t *) 1748 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1749 else 1750 *(uint16_t *)qos = *(uint16_t *) 1751 ((struct ieee80211_qosframe *)wh)->i_qos; 1752 1753 /* 1754 * NB: The mesh STA sets the Mesh Control Present 1755 * subfield to 1 in the Mesh Data frame containing 1756 * an unfragmented MSDU, an A-MSDU, or the first 1757 * fragment of an MSDU. 1758 * After defrag it should always be present. 1759 */ 1760 if (!(qos[1] & IEEE80211_QOS_MC)) { 1761 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1762 ni->ni_macaddr, NULL, 1763 "%s", "Mesh control field not present"); 1764 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1765 goto err; 1766 } 1767 1768 /* pull up enough to get to the mesh control */ 1769 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1770 (m = m_pullup(m, hdrspace + 1771 sizeof(struct ieee80211_meshcntl))) == NULL) { 1772 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1773 ni->ni_macaddr, NULL, 1774 "data too short: expecting %u", hdrspace); 1775 vap->iv_stats.is_rx_tooshort++; 1776 goto out; /* XXX */ 1777 } 1778 /* 1779 * Now calculate the full extent of the headers. Note 1780 * mesh_decap will pull up anything we didn't get 1781 * above when it strips the 802.11 headers. 1782 */ 1783 mc = (const struct ieee80211_meshcntl *) 1784 (mtod(m, const uint8_t *) + hdrspace); 1785 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1786 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1787 ae * IEEE80211_ADDR_LEN; 1788 hdrspace += meshdrlen; 1789 1790 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1791 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1792 (m->m_len < hdrspace) && 1793 ((m = m_pullup(m, hdrspace)) == NULL)) { 1794 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1795 ni->ni_macaddr, NULL, 1796 "data too short: expecting %u", hdrspace); 1797 vap->iv_stats.is_rx_tooshort++; 1798 goto out; /* XXX */ 1799 } 1800 /* XXX: are we sure there is no reallocating after m_pullup? */ 1801 1802 seq = LE_READ_4(mc->mc_seq); 1803 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1804 addr = wh->i_addr3; 1805 else if (ae == IEEE80211_MESH_AE_01) 1806 addr = MC01(mc)->mc_addr4; 1807 else 1808 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1809 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1810 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1811 addr, "data", "%s", "not to me"); 1812 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1813 goto out; 1814 } 1815 if (mesh_checkpseq(vap, addr, seq) != 0) { 1816 vap->iv_stats.is_rx_dup++; 1817 goto out; 1818 } 1819 1820 /* This code "routes" the frame to the right control path */ 1821 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1822 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1823 error = 1824 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1825 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1826 error = mesh_recv_group_data(vap, m, wh, mc); 1827 else 1828 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1829 wh, mc); 1830 } else 1831 error = mesh_recv_group_data(vap, m, wh, mc); 1832 if (error < 0) 1833 goto err; 1834 else if (error > 0) 1835 goto out; 1836 1837 if (ieee80211_radiotap_active_vap(vap)) 1838 ieee80211_radiotap_rx(vap, m); 1839 need_tap = 0; 1840 1841 /* 1842 * Finally, strip the 802.11 header. 1843 */ 1844 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1845 if (m == NULL) { 1846 /* XXX mask bit to check for both */ 1847 /* don't count Null data frames as errors */ 1848 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1849 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1850 goto out; 1851 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1852 ni->ni_macaddr, "data", "%s", "decap error"); 1853 vap->iv_stats.is_rx_decap++; 1854 IEEE80211_NODE_STAT(ni, rx_decap); 1855 goto err; 1856 } 1857 if (qos[0] & IEEE80211_QOS_AMSDU) { 1858 m = ieee80211_decap_amsdu(ni, m); 1859 if (m == NULL) 1860 return IEEE80211_FC0_TYPE_DATA; 1861 } 1862 ieee80211_deliver_data(vap, ni, m); 1863 return type; 1864 case IEEE80211_FC0_TYPE_MGT: 1865 vap->iv_stats.is_rx_mgmt++; 1866 IEEE80211_NODE_STAT(ni, rx_mgmt); 1867 if (dir != IEEE80211_FC1_DIR_NODS) { 1868 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1869 wh, "mgt", "incorrect dir 0x%x", dir); 1870 vap->iv_stats.is_rx_wrongdir++; 1871 goto err; 1872 } 1873 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1874 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1875 ni->ni_macaddr, "mgt", "too short: len %u", 1876 m->m_pkthdr.len); 1877 vap->iv_stats.is_rx_tooshort++; 1878 goto out; 1879 } 1880#ifdef IEEE80211_DEBUG 1881 if ((ieee80211_msg_debug(vap) && 1882 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1883 ieee80211_msg_dumppkts(vap)) { 1884 if_printf(ifp, "received %s from %s rssi %d\n", 1885 ieee80211_mgt_subtype_name[subtype >> 1886 IEEE80211_FC0_SUBTYPE_SHIFT], 1887 ether_sprintf(wh->i_addr2), rssi); 1888 } 1889#endif 1890 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1891 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1892 wh, NULL, "%s", "WEP set but not permitted"); 1893 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1894 goto out; 1895 } 1896 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1897 goto out; 1898 case IEEE80211_FC0_TYPE_CTL: 1899 vap->iv_stats.is_rx_ctl++; 1900 IEEE80211_NODE_STAT(ni, rx_ctrl); 1901 goto out; 1902 default: 1903 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1904 wh, "bad", "frame type 0x%x", type); 1905 /* should not come here */ 1906 break; 1907 } 1908err: 1909 ifp->if_ierrors++; 1910out: 1911 if (m != NULL) { 1912 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1913 ieee80211_radiotap_rx(vap, m); 1914 m_freem(m); 1915 } 1916 return type; 1917#undef HAS_SEQ 1918#undef MC01 1919#undef MC10 1920} 1921 1922static void 1923mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1924 int rssi, int nf) 1925{ 1926 struct ieee80211vap *vap = ni->ni_vap; 1927 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1928 struct ieee80211com *ic = ni->ni_ic; 1929 struct ieee80211_frame *wh; 1930 struct ieee80211_mesh_route *rt; 1931 uint8_t *frm, *efrm; 1932 1933 wh = mtod(m0, struct ieee80211_frame *); 1934 frm = (uint8_t *)&wh[1]; 1935 efrm = mtod(m0, uint8_t *) + m0->m_len; 1936 switch (subtype) { 1937 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1938 case IEEE80211_FC0_SUBTYPE_BEACON: 1939 { 1940 struct ieee80211_scanparams scan; 1941 /* 1942 * We process beacon/probe response 1943 * frames to discover neighbors. 1944 */ 1945 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1946 return; 1947 /* 1948 * Count frame now that we know it's to be processed. 1949 */ 1950 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1951 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1952 IEEE80211_NODE_STAT(ni, rx_beacons); 1953 } else 1954 IEEE80211_NODE_STAT(ni, rx_proberesp); 1955 /* 1956 * If scanning, just pass information to the scan module. 1957 */ 1958 if (ic->ic_flags & IEEE80211_F_SCAN) { 1959 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1960 /* 1961 * Actively scanning a channel marked passive; 1962 * send a probe request now that we know there 1963 * is 802.11 traffic present. 1964 * 1965 * XXX check if the beacon we recv'd gives 1966 * us what we need and suppress the probe req 1967 */ 1968 ieee80211_probe_curchan(vap, 1); 1969 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1970 } 1971 ieee80211_add_scan(vap, &scan, wh, 1972 subtype, rssi, nf); 1973 return; 1974 } 1975 1976 /* The rest of this code assumes we are running */ 1977 if (vap->iv_state != IEEE80211_S_RUN) 1978 return; 1979 /* 1980 * Ignore non-mesh STAs. 1981 */ 1982 if ((scan.capinfo & 1983 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1984 scan.meshid == NULL || scan.meshconf == NULL) { 1985 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1986 wh, "beacon", "%s", "not a mesh sta"); 1987 vap->iv_stats.is_mesh_wrongmesh++; 1988 return; 1989 } 1990 /* 1991 * Ignore STAs for other mesh networks. 1992 */ 1993 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1994 mesh_verify_meshconf(vap, scan.meshconf)) { 1995 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1996 wh, "beacon", "%s", "not for our mesh"); 1997 vap->iv_stats.is_mesh_wrongmesh++; 1998 return; 1999 } 2000 /* 2001 * Peer only based on the current ACL policy. 2002 */ 2003 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 2004 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 2005 wh, NULL, "%s", "disallowed by ACL"); 2006 vap->iv_stats.is_rx_acl++; 2007 return; 2008 } 2009 /* 2010 * Do neighbor discovery. 2011 */ 2012 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 2013 /* 2014 * Create a new entry in the neighbor table. 2015 */ 2016 ni = ieee80211_add_neighbor(vap, wh, &scan); 2017 } 2018 /* 2019 * Automatically peer with discovered nodes if possible. 2020 */ 2021 if (ni != vap->iv_bss && 2022 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 2023 switch (ni->ni_mlstate) { 2024 case IEEE80211_NODE_MESH_IDLE: 2025 { 2026 uint16_t args[1]; 2027 2028 /* Wait for backoff callout to reset counter */ 2029 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 2030 return; 2031 2032 ni->ni_mlpid = mesh_generateid(vap); 2033 if (ni->ni_mlpid == 0) 2034 return; 2035 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 2036 args[0] = ni->ni_mlpid; 2037 ieee80211_send_action(ni, 2038 IEEE80211_ACTION_CAT_SELF_PROT, 2039 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2040 ni->ni_mlrcnt = 0; 2041 mesh_peer_timeout_setup(ni); 2042 break; 2043 } 2044 case IEEE80211_NODE_MESH_ESTABLISHED: 2045 { 2046 /* 2047 * Valid beacon from a peer mesh STA 2048 * bump TA lifetime 2049 */ 2050 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 2051 if(rt != NULL) { 2052 ieee80211_mesh_rt_update(rt, 2053 ticks_to_msecs( 2054 ms->ms_ppath->mpp_inact)); 2055 } 2056 break; 2057 } 2058 default: 2059 break; /* ignore */ 2060 } 2061 } 2062 break; 2063 } 2064 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2065 { 2066 uint8_t *ssid, *meshid, *rates, *xrates; 2067 uint8_t *sfrm; 2068 2069 if (vap->iv_state != IEEE80211_S_RUN) { 2070 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2071 wh, NULL, "wrong state %s", 2072 ieee80211_state_name[vap->iv_state]); 2073 vap->iv_stats.is_rx_mgtdiscard++; 2074 return; 2075 } 2076 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 2077 /* frame must be directed */ 2078 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2079 wh, NULL, "%s", "not unicast"); 2080 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 2081 return; 2082 } 2083 /* 2084 * prreq frame format 2085 * [tlv] ssid 2086 * [tlv] supported rates 2087 * [tlv] extended supported rates 2088 * [tlv] mesh id 2089 */ 2090 ssid = meshid = rates = xrates = NULL; 2091 sfrm = frm; 2092 while (efrm - frm > 1) { 2093 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2094 switch (*frm) { 2095 case IEEE80211_ELEMID_SSID: 2096 ssid = frm; 2097 break; 2098 case IEEE80211_ELEMID_RATES: 2099 rates = frm; 2100 break; 2101 case IEEE80211_ELEMID_XRATES: 2102 xrates = frm; 2103 break; 2104 case IEEE80211_ELEMID_MESHID: 2105 meshid = frm; 2106 break; 2107 } 2108 frm += frm[1] + 2; 2109 } 2110 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2111 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2112 if (xrates != NULL) 2113 IEEE80211_VERIFY_ELEMENT(xrates, 2114 IEEE80211_RATE_MAXSIZE - rates[1], return); 2115 if (meshid != NULL) { 2116 IEEE80211_VERIFY_ELEMENT(meshid, 2117 IEEE80211_MESHID_LEN, return); 2118 /* NB: meshid, not ssid */ 2119 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2120 } 2121 2122 /* XXX find a better class or define it's own */ 2123 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2124 "%s", "recv probe req"); 2125 /* 2126 * Some legacy 11b clients cannot hack a complete 2127 * probe response frame. When the request includes 2128 * only a bare-bones rate set, communicate this to 2129 * the transmit side. 2130 */ 2131 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2132 break; 2133 } 2134 2135 case IEEE80211_FC0_SUBTYPE_ACTION: 2136 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2137 if (ni == vap->iv_bss) { 2138 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2139 wh, NULL, "%s", "unknown node"); 2140 vap->iv_stats.is_rx_mgtdiscard++; 2141 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2142 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2143 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2144 wh, NULL, "%s", "not for us"); 2145 vap->iv_stats.is_rx_mgtdiscard++; 2146 } else if (vap->iv_state != IEEE80211_S_RUN) { 2147 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2148 wh, NULL, "wrong state %s", 2149 ieee80211_state_name[vap->iv_state]); 2150 vap->iv_stats.is_rx_mgtdiscard++; 2151 } else { 2152 if (ieee80211_parse_action(ni, m0) == 0) 2153 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2154 } 2155 break; 2156 2157 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2158 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2159 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2160 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2161 case IEEE80211_FC0_SUBTYPE_ATIM: 2162 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2163 case IEEE80211_FC0_SUBTYPE_AUTH: 2164 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2165 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2166 wh, NULL, "%s", "not handled"); 2167 vap->iv_stats.is_rx_mgtdiscard++; 2168 break; 2169 2170 default: 2171 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2172 wh, "mgt", "subtype 0x%x not handled", subtype); 2173 vap->iv_stats.is_rx_badsubtype++; 2174 break; 2175 } 2176} 2177 2178static void 2179mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2180{ 2181 2182 switch (subtype) { 2183 case IEEE80211_FC0_SUBTYPE_BAR: 2184 ieee80211_recv_bar(ni, m); 2185 break; 2186 } 2187} 2188 2189/* 2190 * Parse meshpeering action ie's for MPM frames 2191 */ 2192static const struct ieee80211_meshpeer_ie * 2193mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2194 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2195 const uint8_t *frm, const uint8_t *efrm, 2196 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2197{ 2198 struct ieee80211vap *vap = ni->ni_vap; 2199 const struct ieee80211_meshpeer_ie *mpie; 2200 uint16_t args[3]; 2201 const uint8_t *meshid, *meshconf, *meshpeer; 2202 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2203 2204 meshid = meshconf = meshpeer = NULL; 2205 while (efrm - frm > 1) { 2206 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2207 switch (*frm) { 2208 case IEEE80211_ELEMID_MESHID: 2209 meshid = frm; 2210 break; 2211 case IEEE80211_ELEMID_MESHCONF: 2212 meshconf = frm; 2213 break; 2214 case IEEE80211_ELEMID_MESHPEER: 2215 meshpeer = frm; 2216 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2217 memset(mp, 0, sizeof(*mp)); 2218 mp->peer_len = mpie->peer_len; 2219 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 2220 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 2221 switch (subtype) { 2222 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2223 mp->peer_linkid = 2224 LE_READ_2(&mpie->peer_linkid); 2225 break; 2226 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2227 /* NB: peer link ID is optional */ 2228 if (mpie->peer_len == 2229 (IEEE80211_MPM_BASE_SZ + 2)) { 2230 mp->peer_linkid = 0; 2231 mp->peer_rcode = 2232 LE_READ_2(&mpie->peer_linkid); 2233 } else { 2234 mp->peer_linkid = 2235 LE_READ_2(&mpie->peer_linkid); 2236 mp->peer_rcode = 2237 LE_READ_2(&mpie->peer_rcode); 2238 } 2239 break; 2240 } 2241 break; 2242 } 2243 frm += frm[1] + 2; 2244 } 2245 2246 /* 2247 * Verify the contents of the frame. 2248 * If it fails validation, close the peer link. 2249 */ 2250 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2251 sendclose = 1; 2252 IEEE80211_DISCARD(vap, 2253 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2254 wh, NULL, "%s", "MPM validation failed"); 2255 } 2256 2257 /* If meshid is not the same reject any frames type. */ 2258 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2259 sendclose = 1; 2260 IEEE80211_DISCARD(vap, 2261 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2262 wh, NULL, "%s", "not for our mesh"); 2263 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2264 /* 2265 * Standard not clear about this, if we dont ignore 2266 * there will be an endless loop between nodes sending 2267 * CLOSE frames between each other with wrong meshid. 2268 * Discard and timers will bring FSM to IDLE state. 2269 */ 2270 return NULL; 2271 } 2272 } 2273 2274 /* 2275 * Close frames are accepted if meshid is the same. 2276 * Verify the other two types. 2277 */ 2278 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2279 mesh_verify_meshconf(vap, meshconf)) { 2280 sendclose = 1; 2281 IEEE80211_DISCARD(vap, 2282 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2283 wh, NULL, "%s", "configuration missmatch"); 2284 } 2285 2286 if (sendclose) { 2287 vap->iv_stats.is_rx_mgtdiscard++; 2288 switch (ni->ni_mlstate) { 2289 case IEEE80211_NODE_MESH_IDLE: 2290 case IEEE80211_NODE_MESH_ESTABLISHED: 2291 case IEEE80211_NODE_MESH_HOLDING: 2292 /* ignore */ 2293 break; 2294 case IEEE80211_NODE_MESH_OPENSNT: 2295 case IEEE80211_NODE_MESH_OPENRCV: 2296 case IEEE80211_NODE_MESH_CONFIRMRCV: 2297 args[0] = ni->ni_mlpid; 2298 args[1] = ni->ni_mllid; 2299 /* Reason codes for rejection */ 2300 switch (subtype) { 2301 case IEEE80211_ACTION_MESHPEERING_OPEN: 2302 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2303 break; 2304 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2305 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2306 break; 2307 } 2308 ieee80211_send_action(ni, 2309 IEEE80211_ACTION_CAT_SELF_PROT, 2310 IEEE80211_ACTION_MESHPEERING_CLOSE, 2311 args); 2312 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2313 mesh_peer_timeout_setup(ni); 2314 break; 2315 } 2316 return NULL; 2317 } 2318 2319 return (const struct ieee80211_meshpeer_ie *) mp; 2320} 2321 2322static int 2323mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2324 const struct ieee80211_frame *wh, 2325 const uint8_t *frm, const uint8_t *efrm) 2326{ 2327 struct ieee80211vap *vap = ni->ni_vap; 2328 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2329 struct ieee80211_meshpeer_ie ie; 2330 const struct ieee80211_meshpeer_ie *meshpeer; 2331 uint16_t args[3]; 2332 2333 /* +2+2 for action + code + capabilites */ 2334 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2335 IEEE80211_ACTION_MESHPEERING_OPEN); 2336 if (meshpeer == NULL) { 2337 return 0; 2338 } 2339 2340 /* XXX move up */ 2341 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2342 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2343 2344 switch (ni->ni_mlstate) { 2345 case IEEE80211_NODE_MESH_IDLE: 2346 /* Reject open request if reached our maximum neighbor count */ 2347 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2348 args[0] = meshpeer->peer_llinkid; 2349 args[1] = 0; 2350 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2351 ieee80211_send_action(ni, 2352 IEEE80211_ACTION_CAT_SELF_PROT, 2353 IEEE80211_ACTION_MESHPEERING_CLOSE, 2354 args); 2355 /* stay in IDLE state */ 2356 return (0); 2357 } 2358 /* Open frame accepted */ 2359 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2360 ni->ni_mllid = meshpeer->peer_llinkid; 2361 ni->ni_mlpid = mesh_generateid(vap); 2362 if (ni->ni_mlpid == 0) 2363 return 0; /* XXX */ 2364 args[0] = ni->ni_mlpid; 2365 /* Announce we're open too... */ 2366 ieee80211_send_action(ni, 2367 IEEE80211_ACTION_CAT_SELF_PROT, 2368 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2369 /* ...and confirm the link. */ 2370 args[0] = ni->ni_mlpid; 2371 args[1] = ni->ni_mllid; 2372 ieee80211_send_action(ni, 2373 IEEE80211_ACTION_CAT_SELF_PROT, 2374 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2375 args); 2376 mesh_peer_timeout_setup(ni); 2377 break; 2378 case IEEE80211_NODE_MESH_OPENRCV: 2379 /* Wrong Link ID */ 2380 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2381 args[0] = ni->ni_mllid; 2382 args[1] = ni->ni_mlpid; 2383 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2384 ieee80211_send_action(ni, 2385 IEEE80211_ACTION_CAT_SELF_PROT, 2386 IEEE80211_ACTION_MESHPEERING_CLOSE, 2387 args); 2388 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2389 mesh_peer_timeout_setup(ni); 2390 break; 2391 } 2392 /* Duplicate open, confirm again. */ 2393 args[0] = ni->ni_mlpid; 2394 args[1] = ni->ni_mllid; 2395 ieee80211_send_action(ni, 2396 IEEE80211_ACTION_CAT_SELF_PROT, 2397 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2398 args); 2399 break; 2400 case IEEE80211_NODE_MESH_OPENSNT: 2401 ni->ni_mllid = meshpeer->peer_llinkid; 2402 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2403 args[0] = ni->ni_mlpid; 2404 args[1] = ni->ni_mllid; 2405 ieee80211_send_action(ni, 2406 IEEE80211_ACTION_CAT_SELF_PROT, 2407 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2408 args); 2409 /* NB: don't setup/clear any timeout */ 2410 break; 2411 case IEEE80211_NODE_MESH_CONFIRMRCV: 2412 if (ni->ni_mlpid != meshpeer->peer_linkid || 2413 ni->ni_mllid != meshpeer->peer_llinkid) { 2414 args[0] = ni->ni_mlpid; 2415 args[1] = ni->ni_mllid; 2416 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2417 ieee80211_send_action(ni, 2418 IEEE80211_ACTION_CAT_SELF_PROT, 2419 IEEE80211_ACTION_MESHPEERING_CLOSE, 2420 args); 2421 mesh_linkchange(ni, 2422 IEEE80211_NODE_MESH_HOLDING); 2423 mesh_peer_timeout_setup(ni); 2424 break; 2425 } 2426 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2427 ni->ni_mllid = meshpeer->peer_llinkid; 2428 args[0] = ni->ni_mlpid; 2429 args[1] = ni->ni_mllid; 2430 ieee80211_send_action(ni, 2431 IEEE80211_ACTION_CAT_SELF_PROT, 2432 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2433 args); 2434 mesh_peer_timeout_stop(ni); 2435 break; 2436 case IEEE80211_NODE_MESH_ESTABLISHED: 2437 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2438 args[0] = ni->ni_mllid; 2439 args[1] = ni->ni_mlpid; 2440 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2441 ieee80211_send_action(ni, 2442 IEEE80211_ACTION_CAT_SELF_PROT, 2443 IEEE80211_ACTION_MESHPEERING_CLOSE, 2444 args); 2445 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2446 mesh_peer_timeout_setup(ni); 2447 break; 2448 } 2449 args[0] = ni->ni_mlpid; 2450 args[1] = ni->ni_mllid; 2451 ieee80211_send_action(ni, 2452 IEEE80211_ACTION_CAT_SELF_PROT, 2453 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2454 args); 2455 break; 2456 case IEEE80211_NODE_MESH_HOLDING: 2457 args[0] = ni->ni_mlpid; 2458 args[1] = meshpeer->peer_llinkid; 2459 /* Standard not clear about what the reaason code should be */ 2460 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2461 ieee80211_send_action(ni, 2462 IEEE80211_ACTION_CAT_SELF_PROT, 2463 IEEE80211_ACTION_MESHPEERING_CLOSE, 2464 args); 2465 break; 2466 } 2467 return 0; 2468} 2469 2470static int 2471mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2472 const struct ieee80211_frame *wh, 2473 const uint8_t *frm, const uint8_t *efrm) 2474{ 2475 struct ieee80211vap *vap = ni->ni_vap; 2476 struct ieee80211_meshpeer_ie ie; 2477 const struct ieee80211_meshpeer_ie *meshpeer; 2478 uint16_t args[3]; 2479 2480 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2481 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2482 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2483 if (meshpeer == NULL) { 2484 return 0; 2485 } 2486 2487 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2488 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2489 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2490 2491 switch (ni->ni_mlstate) { 2492 case IEEE80211_NODE_MESH_OPENRCV: 2493 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2494 mesh_peer_timeout_stop(ni); 2495 break; 2496 case IEEE80211_NODE_MESH_OPENSNT: 2497 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2498 mesh_peer_timeout_setup(ni); 2499 break; 2500 case IEEE80211_NODE_MESH_HOLDING: 2501 args[0] = ni->ni_mlpid; 2502 args[1] = meshpeer->peer_llinkid; 2503 /* Standard not clear about what the reaason code should be */ 2504 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2505 ieee80211_send_action(ni, 2506 IEEE80211_ACTION_CAT_SELF_PROT, 2507 IEEE80211_ACTION_MESHPEERING_CLOSE, 2508 args); 2509 break; 2510 case IEEE80211_NODE_MESH_CONFIRMRCV: 2511 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2512 args[0] = ni->ni_mlpid; 2513 args[1] = ni->ni_mllid; 2514 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2515 ieee80211_send_action(ni, 2516 IEEE80211_ACTION_CAT_SELF_PROT, 2517 IEEE80211_ACTION_MESHPEERING_CLOSE, 2518 args); 2519 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2520 mesh_peer_timeout_setup(ni); 2521 } 2522 break; 2523 default: 2524 IEEE80211_DISCARD(vap, 2525 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2526 wh, NULL, "received confirm in invalid state %d", 2527 ni->ni_mlstate); 2528 vap->iv_stats.is_rx_mgtdiscard++; 2529 break; 2530 } 2531 return 0; 2532} 2533 2534static int 2535mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2536 const struct ieee80211_frame *wh, 2537 const uint8_t *frm, const uint8_t *efrm) 2538{ 2539 struct ieee80211_meshpeer_ie ie; 2540 const struct ieee80211_meshpeer_ie *meshpeer; 2541 uint16_t args[3]; 2542 2543 /* +2 for action + code */ 2544 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2545 IEEE80211_ACTION_MESHPEERING_CLOSE); 2546 if (meshpeer == NULL) { 2547 return 0; 2548 } 2549 2550 /* 2551 * XXX: check reason code, for example we could receive 2552 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2553 * to peer again. 2554 */ 2555 2556 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2557 ni, "%s", "recv PEER CLOSE"); 2558 2559 switch (ni->ni_mlstate) { 2560 case IEEE80211_NODE_MESH_IDLE: 2561 /* ignore */ 2562 break; 2563 case IEEE80211_NODE_MESH_OPENRCV: 2564 case IEEE80211_NODE_MESH_OPENSNT: 2565 case IEEE80211_NODE_MESH_CONFIRMRCV: 2566 case IEEE80211_NODE_MESH_ESTABLISHED: 2567 args[0] = ni->ni_mlpid; 2568 args[1] = ni->ni_mllid; 2569 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2570 ieee80211_send_action(ni, 2571 IEEE80211_ACTION_CAT_SELF_PROT, 2572 IEEE80211_ACTION_MESHPEERING_CLOSE, 2573 args); 2574 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2575 mesh_peer_timeout_setup(ni); 2576 break; 2577 case IEEE80211_NODE_MESH_HOLDING: 2578 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2579 mesh_peer_timeout_stop(ni); 2580 break; 2581 } 2582 return 0; 2583} 2584 2585/* 2586 * Link Metric handling. 2587 */ 2588static int 2589mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2590 const struct ieee80211_frame *wh, 2591 const uint8_t *frm, const uint8_t *efrm) 2592{ 2593 const struct ieee80211_meshlmetric_ie *ie = 2594 (const struct ieee80211_meshlmetric_ie *) 2595 (frm+2); /* action + code */ 2596 struct ieee80211_meshlmetric_ie lm_rep; 2597 2598 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2599 lm_rep.lm_flags = 0; 2600 lm_rep.lm_metric = mesh_airtime_calc(ni); 2601 ieee80211_send_action(ni, 2602 IEEE80211_ACTION_CAT_MESH, 2603 IEEE80211_ACTION_MESH_LMETRIC, 2604 &lm_rep); 2605 } 2606 /* XXX: else do nothing for now */ 2607 return 0; 2608} 2609 2610/* 2611 * Mesh Gate Announcement handling. 2612 */ 2613static int 2614mesh_recv_action_meshgate(struct ieee80211_node *ni, 2615 const struct ieee80211_frame *wh, 2616 const uint8_t *frm, const uint8_t *efrm) 2617{ 2618 struct ieee80211vap *vap = ni->ni_vap; 2619 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2620 struct ieee80211_mesh_gate_route *gr, *next; 2621 struct ieee80211_mesh_route *rt_gate; 2622 struct ieee80211_meshgann_ie pgann; 2623 int found = 0; 2624 const struct ieee80211_meshgann_ie *ie = 2625 (const struct ieee80211_meshgann_ie *) 2626 (frm+2); /* action + code */ 2627 2628 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie->gann_addr)) 2629 return 0; 2630 2631 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2632 "received GANN, meshgate: %6D (seq %u)", ie->gann_addr, ":", 2633 ie->gann_seq); 2634 2635 if (ms == NULL) 2636 return (0); 2637 MESH_RT_LOCK(ms); 2638 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2639 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie->gann_addr)) 2640 continue; 2641 if (ie->gann_seq <= gr->gr_lastseq) { 2642 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2643 ni->ni_macaddr, NULL, 2644 "GANN old seqno %u <= %u", 2645 ie->gann_seq, gr->gr_lastseq); 2646 MESH_RT_UNLOCK(ms); 2647 return (0); 2648 } 2649 /* corresponding mesh gate found & GANN accepted */ 2650 found = 1; 2651 break; 2652 2653 } 2654 if (found == 0) { 2655 /* this GANN is from a new mesh Gate add it to known table. */ 2656 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie->gann_addr, 2657 "stored new GANN information, seq %u.", ie->gann_seq); 2658 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2659 M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO); 2660 IEEE80211_ADDR_COPY(gr->gr_addr, ie->gann_addr); 2661 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2662 } 2663 gr->gr_lastseq = ie->gann_seq; 2664 2665 /* check if we have a path to this gate */ 2666 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2667 if (rt_gate != NULL && 2668 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2669 gr->gr_route = rt_gate; 2670 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2671 } 2672 2673 MESH_RT_UNLOCK(ms); 2674 2675 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2676 if ((ie->gann_ttl - 1) < 1 && 2677 !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2678 return 0; 2679 pgann.gann_flags = ie->gann_flags; /* Reserved */ 2680 pgann.gann_hopcount = ie->gann_hopcount + 1; 2681 pgann.gann_ttl = ie->gann_ttl - 1; 2682 IEEE80211_ADDR_COPY(pgann.gann_addr, ie->gann_addr); 2683 pgann.gann_seq = ie->gann_seq; 2684 pgann.gann_interval = ie->gann_interval; 2685 2686 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie->gann_addr, 2687 "%s", "propagate GANN"); 2688 2689 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2690 IEEE80211_ACTION_MESH_GANN, &pgann); 2691 2692 return 0; 2693} 2694 2695static int 2696mesh_send_action(struct ieee80211_node *ni, 2697 const uint8_t sa[IEEE80211_ADDR_LEN], 2698 const uint8_t da[IEEE80211_ADDR_LEN], 2699 struct mbuf *m) 2700{ 2701 struct ieee80211vap *vap = ni->ni_vap; 2702 struct ieee80211com *ic = ni->ni_ic; 2703 struct ieee80211_bpf_params params; 2704 struct ieee80211_frame *wh; 2705 2706 KASSERT(ni != NULL, ("null node")); 2707 2708 if (vap->iv_state == IEEE80211_S_CAC) { 2709 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2710 "block %s frame in CAC state", "Mesh action"); 2711 vap->iv_stats.is_tx_badstate++; 2712 ieee80211_free_node(ni); 2713 m_freem(m); 2714 return EIO; /* XXX */ 2715 } 2716 2717 M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 2718 if (m == NULL) { 2719 ieee80211_free_node(ni); 2720 return ENOMEM; 2721 } 2722 2723 wh = mtod(m, struct ieee80211_frame *); 2724 ieee80211_send_setup(ni, m, 2725 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2726 IEEE80211_NONQOS_TID, sa, da, sa); 2727 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2728 2729 memset(¶ms, 0, sizeof(params)); 2730 params.ibp_pri = WME_AC_VO; 2731 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2732 if (IEEE80211_IS_MULTICAST(da)) 2733 params.ibp_try0 = 1; 2734 else 2735 params.ibp_try0 = ni->ni_txparms->maxretry; 2736 params.ibp_power = ni->ni_txpower; 2737 2738 IEEE80211_NODE_STAT(ni, tx_mgmt); 2739 2740 return ic->ic_raw_xmit(ni, m, ¶ms); 2741} 2742 2743#define ADDSHORT(frm, v) do { \ 2744 frm[0] = (v) & 0xff; \ 2745 frm[1] = (v) >> 8; \ 2746 frm += 2; \ 2747} while (0) 2748#define ADDWORD(frm, v) do { \ 2749 frm[0] = (v) & 0xff; \ 2750 frm[1] = ((v) >> 8) & 0xff; \ 2751 frm[2] = ((v) >> 16) & 0xff; \ 2752 frm[3] = ((v) >> 24) & 0xff; \ 2753 frm += 4; \ 2754} while (0) 2755 2756static int 2757mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2758 int category, int action, void *args0) 2759{ 2760 struct ieee80211vap *vap = ni->ni_vap; 2761 struct ieee80211com *ic = ni->ni_ic; 2762 uint16_t *args = args0; 2763 const struct ieee80211_rateset *rs; 2764 struct mbuf *m; 2765 uint8_t *frm; 2766 2767 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2768 "send PEER OPEN action: localid 0x%x", args[0]); 2769 2770 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2771 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2772 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2773 ieee80211_ref_node(ni); 2774 2775 m = ieee80211_getmgtframe(&frm, 2776 ic->ic_headroom + sizeof(struct ieee80211_frame), 2777 sizeof(uint16_t) /* action+category */ 2778 + sizeof(uint16_t) /* capabilites */ 2779 + 2 + IEEE80211_RATE_SIZE 2780 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2781 + 2 + IEEE80211_MESHID_LEN 2782 + sizeof(struct ieee80211_meshconf_ie) 2783 + sizeof(struct ieee80211_meshpeer_ie) 2784 ); 2785 if (m != NULL) { 2786 /* 2787 * mesh peer open action frame format: 2788 * [1] category 2789 * [1] action 2790 * [2] capabilities 2791 * [tlv] rates 2792 * [tlv] xrates 2793 * [tlv] mesh id 2794 * [tlv] mesh conf 2795 * [tlv] mesh peer link mgmt 2796 */ 2797 *frm++ = category; 2798 *frm++ = action; 2799 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2800 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2801 frm = ieee80211_add_rates(frm, rs); 2802 frm = ieee80211_add_xrates(frm, rs); 2803 frm = ieee80211_add_meshid(frm, vap); 2804 frm = ieee80211_add_meshconf(frm, vap); 2805 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2806 args[0], 0, 0); 2807 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2808 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2809 } else { 2810 vap->iv_stats.is_tx_nobuf++; 2811 ieee80211_free_node(ni); 2812 return ENOMEM; 2813 } 2814} 2815 2816static int 2817mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2818 int category, int action, void *args0) 2819{ 2820 struct ieee80211vap *vap = ni->ni_vap; 2821 struct ieee80211com *ic = ni->ni_ic; 2822 uint16_t *args = args0; 2823 const struct ieee80211_rateset *rs; 2824 struct mbuf *m; 2825 uint8_t *frm; 2826 2827 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2828 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2829 args[0], args[1]); 2830 2831 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2832 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2833 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2834 ieee80211_ref_node(ni); 2835 2836 m = ieee80211_getmgtframe(&frm, 2837 ic->ic_headroom + sizeof(struct ieee80211_frame), 2838 sizeof(uint16_t) /* action+category */ 2839 + sizeof(uint16_t) /* capabilites */ 2840 + sizeof(uint16_t) /* status code */ 2841 + sizeof(uint16_t) /* AID */ 2842 + 2 + IEEE80211_RATE_SIZE 2843 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2844 + 2 + IEEE80211_MESHID_LEN 2845 + sizeof(struct ieee80211_meshconf_ie) 2846 + sizeof(struct ieee80211_meshpeer_ie) 2847 ); 2848 if (m != NULL) { 2849 /* 2850 * mesh peer confirm action frame format: 2851 * [1] category 2852 * [1] action 2853 * [2] capabilities 2854 * [2] status code 2855 * [2] association id (peer ID) 2856 * [tlv] rates 2857 * [tlv] xrates 2858 * [tlv] mesh id 2859 * [tlv] mesh conf 2860 * [tlv] mesh peer link mgmt 2861 */ 2862 *frm++ = category; 2863 *frm++ = action; 2864 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2865 ADDSHORT(frm, 0); /* status code */ 2866 ADDSHORT(frm, args[1]); /* AID */ 2867 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2868 frm = ieee80211_add_rates(frm, rs); 2869 frm = ieee80211_add_xrates(frm, rs); 2870 frm = ieee80211_add_meshid(frm, vap); 2871 frm = ieee80211_add_meshconf(frm, vap); 2872 frm = ieee80211_add_meshpeer(frm, 2873 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2874 args[0], args[1], 0); 2875 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2876 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2877 } else { 2878 vap->iv_stats.is_tx_nobuf++; 2879 ieee80211_free_node(ni); 2880 return ENOMEM; 2881 } 2882} 2883 2884static int 2885mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2886 int category, int action, void *args0) 2887{ 2888 struct ieee80211vap *vap = ni->ni_vap; 2889 struct ieee80211com *ic = ni->ni_ic; 2890 uint16_t *args = args0; 2891 struct mbuf *m; 2892 uint8_t *frm; 2893 2894 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2895 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2896 args[0], args[1], args[2]); 2897 2898 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2899 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2900 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2901 ieee80211_ref_node(ni); 2902 2903 m = ieee80211_getmgtframe(&frm, 2904 ic->ic_headroom + sizeof(struct ieee80211_frame), 2905 sizeof(uint16_t) /* action+category */ 2906 + sizeof(uint16_t) /* reason code */ 2907 + 2 + IEEE80211_MESHID_LEN 2908 + sizeof(struct ieee80211_meshpeer_ie) 2909 ); 2910 if (m != NULL) { 2911 /* 2912 * mesh peer close action frame format: 2913 * [1] category 2914 * [1] action 2915 * [tlv] mesh id 2916 * [tlv] mesh peer link mgmt 2917 */ 2918 *frm++ = category; 2919 *frm++ = action; 2920 frm = ieee80211_add_meshid(frm, vap); 2921 frm = ieee80211_add_meshpeer(frm, 2922 IEEE80211_ACTION_MESHPEERING_CLOSE, 2923 args[0], args[1], args[2]); 2924 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2925 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2926 } else { 2927 vap->iv_stats.is_tx_nobuf++; 2928 ieee80211_free_node(ni); 2929 return ENOMEM; 2930 } 2931} 2932 2933static int 2934mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2935 int category, int action, void *arg0) 2936{ 2937 struct ieee80211vap *vap = ni->ni_vap; 2938 struct ieee80211com *ic = ni->ni_ic; 2939 struct ieee80211_meshlmetric_ie *ie = arg0; 2940 struct mbuf *m; 2941 uint8_t *frm; 2942 2943 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2944 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2945 ni, "%s", "send LINK METRIC REQUEST action"); 2946 } else { 2947 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2948 ni, "send LINK METRIC REPLY action: metric 0x%x", 2949 ie->lm_metric); 2950 } 2951 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2952 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2953 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2954 ieee80211_ref_node(ni); 2955 2956 m = ieee80211_getmgtframe(&frm, 2957 ic->ic_headroom + sizeof(struct ieee80211_frame), 2958 sizeof(uint16_t) + /* action+category */ 2959 sizeof(struct ieee80211_meshlmetric_ie) 2960 ); 2961 if (m != NULL) { 2962 /* 2963 * mesh link metric 2964 * [1] category 2965 * [1] action 2966 * [tlv] mesh link metric 2967 */ 2968 *frm++ = category; 2969 *frm++ = action; 2970 frm = ieee80211_add_meshlmetric(frm, 2971 ie->lm_flags, ie->lm_metric); 2972 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2973 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2974 } else { 2975 vap->iv_stats.is_tx_nobuf++; 2976 ieee80211_free_node(ni); 2977 return ENOMEM; 2978 } 2979} 2980 2981static int 2982mesh_send_action_meshgate(struct ieee80211_node *ni, 2983 int category, int action, void *arg0) 2984{ 2985 struct ieee80211vap *vap = ni->ni_vap; 2986 struct ieee80211com *ic = ni->ni_ic; 2987 struct ieee80211_meshgann_ie *ie = arg0; 2988 struct mbuf *m; 2989 uint8_t *frm; 2990 2991 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2992 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2993 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2994 ieee80211_ref_node(ni); 2995 2996 m = ieee80211_getmgtframe(&frm, 2997 ic->ic_headroom + sizeof(struct ieee80211_frame), 2998 sizeof(uint16_t) + /* action+category */ 2999 IEEE80211_MESHGANN_BASE_SZ 3000 ); 3001 if (m != NULL) { 3002 /* 3003 * mesh link metric 3004 * [1] category 3005 * [1] action 3006 * [tlv] mesh gate annoucement 3007 */ 3008 *frm++ = category; 3009 *frm++ = action; 3010 frm = ieee80211_add_meshgate(frm, ie); 3011 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3012 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 3013 } else { 3014 vap->iv_stats.is_tx_nobuf++; 3015 ieee80211_free_node(ni); 3016 return ENOMEM; 3017 } 3018} 3019 3020static void 3021mesh_peer_timeout_setup(struct ieee80211_node *ni) 3022{ 3023 switch (ni->ni_mlstate) { 3024 case IEEE80211_NODE_MESH_HOLDING: 3025 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 3026 break; 3027 case IEEE80211_NODE_MESH_CONFIRMRCV: 3028 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 3029 break; 3030 case IEEE80211_NODE_MESH_IDLE: 3031 ni->ni_mltval = 0; 3032 break; 3033 default: 3034 ni->ni_mltval = ieee80211_mesh_retrytimeout; 3035 break; 3036 } 3037 if (ni->ni_mltval) 3038 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 3039 mesh_peer_timeout_cb, ni); 3040} 3041 3042/* 3043 * Same as above but backoffs timer statisically 50%. 3044 */ 3045static void 3046mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3047{ 3048 uint32_t r; 3049 3050 r = arc4random(); 3051 ni->ni_mltval += r % ni->ni_mltval; 3052 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3053 ni); 3054} 3055 3056static __inline void 3057mesh_peer_timeout_stop(struct ieee80211_node *ni) 3058{ 3059 callout_drain(&ni->ni_mltimer); 3060} 3061 3062static void 3063mesh_peer_backoff_cb(void *arg) 3064{ 3065 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3066 3067 /* After backoff timeout, try to peer automatically again. */ 3068 ni->ni_mlhcnt = 0; 3069} 3070 3071/* 3072 * Mesh Peer Link Management FSM timeout handling. 3073 */ 3074static void 3075mesh_peer_timeout_cb(void *arg) 3076{ 3077 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3078 uint16_t args[3]; 3079 3080 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3081 ni, "mesh link timeout, state %d, retry counter %d", 3082 ni->ni_mlstate, ni->ni_mlrcnt); 3083 3084 switch (ni->ni_mlstate) { 3085 case IEEE80211_NODE_MESH_IDLE: 3086 case IEEE80211_NODE_MESH_ESTABLISHED: 3087 break; 3088 case IEEE80211_NODE_MESH_OPENSNT: 3089 case IEEE80211_NODE_MESH_OPENRCV: 3090 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3091 args[0] = ni->ni_mlpid; 3092 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3093 ieee80211_send_action(ni, 3094 IEEE80211_ACTION_CAT_SELF_PROT, 3095 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3096 ni->ni_mlrcnt = 0; 3097 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3098 mesh_peer_timeout_setup(ni); 3099 } else { 3100 args[0] = ni->ni_mlpid; 3101 ieee80211_send_action(ni, 3102 IEEE80211_ACTION_CAT_SELF_PROT, 3103 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3104 ni->ni_mlrcnt++; 3105 mesh_peer_timeout_backoff(ni); 3106 } 3107 break; 3108 case IEEE80211_NODE_MESH_CONFIRMRCV: 3109 args[0] = ni->ni_mlpid; 3110 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3111 ieee80211_send_action(ni, 3112 IEEE80211_ACTION_CAT_SELF_PROT, 3113 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3114 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3115 mesh_peer_timeout_setup(ni); 3116 break; 3117 case IEEE80211_NODE_MESH_HOLDING: 3118 ni->ni_mlhcnt++; 3119 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3120 callout_reset(&ni->ni_mlhtimer, 3121 ieee80211_mesh_backofftimeout, 3122 mesh_peer_backoff_cb, ni); 3123 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3124 break; 3125 } 3126} 3127 3128static int 3129mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3130{ 3131 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3132 3133 if (ie == NULL || ie[1] != ms->ms_idlen) 3134 return 1; 3135 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3136} 3137 3138/* 3139 * Check if we are using the same algorithms for this mesh. 3140 */ 3141static int 3142mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3143{ 3144 const struct ieee80211_meshconf_ie *meshconf = 3145 (const struct ieee80211_meshconf_ie *) ie; 3146 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3147 3148 if (meshconf == NULL) 3149 return 1; 3150 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3151 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3152 "unknown path selection algorithm: 0x%x\n", 3153 meshconf->conf_pselid); 3154 return 1; 3155 } 3156 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3157 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3158 "unknown path metric algorithm: 0x%x\n", 3159 meshconf->conf_pmetid); 3160 return 1; 3161 } 3162 if (meshconf->conf_ccid != 0) { 3163 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3164 "unknown congestion control algorithm: 0x%x\n", 3165 meshconf->conf_ccid); 3166 return 1; 3167 } 3168 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3169 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3170 "unknown sync algorithm: 0x%x\n", 3171 meshconf->conf_syncid); 3172 return 1; 3173 } 3174 if (meshconf->conf_authid != 0) { 3175 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3176 "unknown auth auth algorithm: 0x%x\n", 3177 meshconf->conf_pselid); 3178 return 1; 3179 } 3180 /* Not accepting peers */ 3181 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3182 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3183 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3184 return 1; 3185 } 3186 return 0; 3187} 3188 3189static int 3190mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3191 const uint8_t *ie) 3192{ 3193 const struct ieee80211_meshpeer_ie *meshpeer = 3194 (const struct ieee80211_meshpeer_ie *) ie; 3195 3196 if (meshpeer == NULL || 3197 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3198 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3199 return 1; 3200 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3201 IEEE80211_DPRINTF(vap, 3202 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3203 "Only MPM protocol is supported (proto: 0x%02X)", 3204 meshpeer->peer_proto); 3205 return 1; 3206 } 3207 switch (subtype) { 3208 case IEEE80211_ACTION_MESHPEERING_OPEN: 3209 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3210 return 1; 3211 break; 3212 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3213 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3214 return 1; 3215 break; 3216 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3217 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3218 return 1; 3219 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3220 meshpeer->peer_linkid != 0) 3221 return 1; 3222 if (meshpeer->peer_rcode == 0) 3223 return 1; 3224 break; 3225 } 3226 return 0; 3227} 3228 3229/* 3230 * Add a Mesh ID IE to a frame. 3231 */ 3232uint8_t * 3233ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3234{ 3235 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3236 3237 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3238 3239 *frm++ = IEEE80211_ELEMID_MESHID; 3240 *frm++ = ms->ms_idlen; 3241 memcpy(frm, ms->ms_id, ms->ms_idlen); 3242 return frm + ms->ms_idlen; 3243} 3244 3245/* 3246 * Add a Mesh Configuration IE to a frame. 3247 * For now just use HWMP routing, Airtime link metric, Null Congestion 3248 * Signaling, Null Sync Protocol and Null Authentication. 3249 */ 3250uint8_t * 3251ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3252{ 3253 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3254 uint16_t caps; 3255 3256 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3257 3258 *frm++ = IEEE80211_ELEMID_MESHCONF; 3259 *frm++ = IEEE80211_MESH_CONF_SZ; 3260 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3261 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3262 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3263 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3264 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3265 /* NB: set the number of neighbors before the rest */ 3266 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3267 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3268 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3269 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3270 frm += 1; 3271 caps = 0; 3272 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3273 caps |= IEEE80211_MESHCONF_CAP_AP; 3274 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3275 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3276 *frm++ = caps; 3277 return frm; 3278} 3279 3280/* 3281 * Add a Mesh Peer Management IE to a frame. 3282 */ 3283uint8_t * 3284ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3285 uint16_t peerid, uint16_t reason) 3286{ 3287 3288 KASSERT(localid != 0, ("localid == 0")); 3289 3290 *frm++ = IEEE80211_ELEMID_MESHPEER; 3291 switch (subtype) { 3292 case IEEE80211_ACTION_MESHPEERING_OPEN: 3293 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3294 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3295 ADDSHORT(frm, localid); /* local ID */ 3296 break; 3297 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3298 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3299 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3300 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3301 ADDSHORT(frm, localid); /* local ID */ 3302 ADDSHORT(frm, peerid); /* peer ID */ 3303 break; 3304 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3305 if (peerid) 3306 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3307 else 3308 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3309 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3310 ADDSHORT(frm, localid); /* local ID */ 3311 if (peerid) 3312 ADDSHORT(frm, peerid); /* peer ID */ 3313 ADDSHORT(frm, reason); 3314 break; 3315 } 3316 return frm; 3317} 3318 3319/* 3320 * Compute an Airtime Link Metric for the link with this node. 3321 * 3322 * Based on Draft 3.0 spec (11B.10, p.149). 3323 */ 3324/* 3325 * Max 802.11s overhead. 3326 */ 3327#define IEEE80211_MESH_MAXOVERHEAD \ 3328 (sizeof(struct ieee80211_qosframe_addr4) \ 3329 + sizeof(struct ieee80211_meshcntl_ae10) \ 3330 + sizeof(struct llc) \ 3331 + IEEE80211_ADDR_LEN \ 3332 + IEEE80211_WEP_IVLEN \ 3333 + IEEE80211_WEP_KIDLEN \ 3334 + IEEE80211_WEP_CRCLEN \ 3335 + IEEE80211_WEP_MICLEN \ 3336 + IEEE80211_CRC_LEN) 3337uint32_t 3338mesh_airtime_calc(struct ieee80211_node *ni) 3339{ 3340#define M_BITS 8 3341#define S_FACTOR (2 * M_BITS) 3342 struct ieee80211com *ic = ni->ni_ic; 3343 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3344 const static int nbits = 8192 << M_BITS; 3345 uint32_t overhead, rate, errrate; 3346 uint64_t res; 3347 3348 /* Time to transmit a frame */ 3349 rate = ni->ni_txrate; 3350 overhead = ieee80211_compute_duration(ic->ic_rt, 3351 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3352 /* Error rate in percentage */ 3353 /* XXX assuming small failures are ok */ 3354 errrate = (((ifp->if_oerrors + 3355 ifp->if_ierrors) / 100) << M_BITS) / 100; 3356 res = (overhead + (nbits / rate)) * 3357 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3358 3359 return (uint32_t)(res >> S_FACTOR); 3360#undef M_BITS 3361#undef S_FACTOR 3362} 3363 3364/* 3365 * Add a Mesh Link Metric report IE to a frame. 3366 */ 3367uint8_t * 3368ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3369{ 3370 *frm++ = IEEE80211_ELEMID_MESHLINK; 3371 *frm++ = 5; 3372 *frm++ = flags; 3373 ADDWORD(frm, metric); 3374 return frm; 3375} 3376 3377/* 3378 * Add a Mesh Gate Announcement IE to a frame. 3379 */ 3380uint8_t * 3381ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3382{ 3383 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3384 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3385 *frm++ = ie->gann_flags; 3386 *frm++ = ie->gann_hopcount; 3387 *frm++ = ie->gann_ttl; 3388 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3389 frm += 6; 3390 ADDWORD(frm, ie->gann_seq); 3391 ADDSHORT(frm, ie->gann_interval); 3392 return frm; 3393} 3394#undef ADDSHORT 3395#undef ADDWORD 3396 3397/* 3398 * Initialize any mesh-specific node state. 3399 */ 3400void 3401ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3402{ 3403 ni->ni_flags |= IEEE80211_NODE_QOS; 3404 callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE); 3405 callout_init(&ni->ni_mlhtimer, CALLOUT_MPSAFE); 3406} 3407 3408/* 3409 * Cleanup any mesh-specific node state. 3410 */ 3411void 3412ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3413{ 3414 struct ieee80211vap *vap = ni->ni_vap; 3415 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3416 3417 callout_drain(&ni->ni_mltimer); 3418 callout_drain(&ni->ni_mlhtimer); 3419 /* NB: short-circuit callbacks after mesh_vdetach */ 3420 if (vap->iv_mesh != NULL) 3421 ms->ms_ppath->mpp_peerdown(ni); 3422} 3423 3424void 3425ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3426{ 3427 ni->ni_meshidlen = ie[1]; 3428 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3429} 3430 3431/* 3432 * Setup mesh-specific node state on neighbor discovery. 3433 */ 3434void 3435ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3436 const struct ieee80211_frame *wh, 3437 const struct ieee80211_scanparams *sp) 3438{ 3439 ieee80211_parse_meshid(ni, sp->meshid); 3440} 3441 3442void 3443ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3444 struct ieee80211_beacon_offsets *bo) 3445{ 3446 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3447 3448 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3449 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3450 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3451 } 3452} 3453 3454static int 3455mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3456{ 3457 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3458 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3459 struct ieee80211_mesh_route *rt; 3460 struct ieee80211req_mesh_route *imr; 3461 size_t len, off; 3462 uint8_t *p; 3463 int error; 3464 3465 if (vap->iv_opmode != IEEE80211_M_MBSS) 3466 return ENOSYS; 3467 3468 error = 0; 3469 switch (ireq->i_type) { 3470 case IEEE80211_IOC_MESH_ID: 3471 ireq->i_len = ms->ms_idlen; 3472 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3473 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3474 break; 3475 case IEEE80211_IOC_MESH_AP: 3476 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3477 break; 3478 case IEEE80211_IOC_MESH_FWRD: 3479 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3480 break; 3481 case IEEE80211_IOC_MESH_GATE: 3482 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3483 break; 3484 case IEEE80211_IOC_MESH_TTL: 3485 ireq->i_val = ms->ms_ttl; 3486 break; 3487 case IEEE80211_IOC_MESH_RTCMD: 3488 switch (ireq->i_val) { 3489 case IEEE80211_MESH_RTCMD_LIST: 3490 len = 0; 3491 MESH_RT_LOCK(ms); 3492 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3493 len += sizeof(*imr); 3494 } 3495 MESH_RT_UNLOCK(ms); 3496 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3497 ireq->i_len = len; 3498 return ENOMEM; 3499 } 3500 ireq->i_len = len; 3501 /* XXX M_WAIT? */ 3502 p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO); 3503 if (p == NULL) 3504 return ENOMEM; 3505 off = 0; 3506 MESH_RT_LOCK(ms); 3507 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3508 if (off >= len) 3509 break; 3510 imr = (struct ieee80211req_mesh_route *) 3511 (p + off); 3512 IEEE80211_ADDR_COPY(imr->imr_dest, 3513 rt->rt_dest); 3514 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3515 rt->rt_nexthop); 3516 imr->imr_metric = rt->rt_metric; 3517 imr->imr_nhops = rt->rt_nhops; 3518 imr->imr_lifetime = 3519 ieee80211_mesh_rt_update(rt, 0); 3520 imr->imr_lastmseq = rt->rt_lastmseq; 3521 imr->imr_flags = rt->rt_flags; /* last */ 3522 off += sizeof(*imr); 3523 } 3524 MESH_RT_UNLOCK(ms); 3525 error = copyout(p, (uint8_t *)ireq->i_data, 3526 ireq->i_len); 3527 free(p, M_TEMP); 3528 break; 3529 case IEEE80211_MESH_RTCMD_FLUSH: 3530 case IEEE80211_MESH_RTCMD_ADD: 3531 case IEEE80211_MESH_RTCMD_DELETE: 3532 return EINVAL; 3533 default: 3534 return ENOSYS; 3535 } 3536 break; 3537 case IEEE80211_IOC_MESH_PR_METRIC: 3538 len = strlen(ms->ms_pmetric->mpm_descr); 3539 if (ireq->i_len < len) 3540 return EINVAL; 3541 ireq->i_len = len; 3542 error = copyout(ms->ms_pmetric->mpm_descr, 3543 (uint8_t *)ireq->i_data, len); 3544 break; 3545 case IEEE80211_IOC_MESH_PR_PATH: 3546 len = strlen(ms->ms_ppath->mpp_descr); 3547 if (ireq->i_len < len) 3548 return EINVAL; 3549 ireq->i_len = len; 3550 error = copyout(ms->ms_ppath->mpp_descr, 3551 (uint8_t *)ireq->i_data, len); 3552 break; 3553 default: 3554 return ENOSYS; 3555 } 3556 3557 return error; 3558} 3559IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3560 3561static int 3562mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3563{ 3564 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3565 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3566 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3567 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3568 int error; 3569 3570 if (vap->iv_opmode != IEEE80211_M_MBSS) 3571 return ENOSYS; 3572 3573 error = 0; 3574 switch (ireq->i_type) { 3575 case IEEE80211_IOC_MESH_ID: 3576 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3577 return EINVAL; 3578 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3579 if (error != 0) 3580 break; 3581 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3582 ms->ms_idlen = ireq->i_len; 3583 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3584 error = ENETRESET; 3585 break; 3586 case IEEE80211_IOC_MESH_AP: 3587 if (ireq->i_val) 3588 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3589 else 3590 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3591 error = ENETRESET; 3592 break; 3593 case IEEE80211_IOC_MESH_FWRD: 3594 if (ireq->i_val) 3595 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3596 else 3597 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3598 mesh_gatemode_setup(vap); 3599 break; 3600 case IEEE80211_IOC_MESH_GATE: 3601 if (ireq->i_val) 3602 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3603 else 3604 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3605 break; 3606 case IEEE80211_IOC_MESH_TTL: 3607 ms->ms_ttl = (uint8_t) ireq->i_val; 3608 break; 3609 case IEEE80211_IOC_MESH_RTCMD: 3610 switch (ireq->i_val) { 3611 case IEEE80211_MESH_RTCMD_LIST: 3612 return EINVAL; 3613 case IEEE80211_MESH_RTCMD_FLUSH: 3614 ieee80211_mesh_rt_flush(vap); 3615 break; 3616 case IEEE80211_MESH_RTCMD_ADD: 3617 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3618 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3619 return EINVAL; 3620 error = copyin(ireq->i_data, &tmpaddr, 3621 IEEE80211_ADDR_LEN); 3622 if (error == 0) 3623 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3624 break; 3625 case IEEE80211_MESH_RTCMD_DELETE: 3626 ieee80211_mesh_rt_del(vap, ireq->i_data); 3627 break; 3628 default: 3629 return ENOSYS; 3630 } 3631 break; 3632 case IEEE80211_IOC_MESH_PR_METRIC: 3633 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3634 if (error == 0) { 3635 error = mesh_select_proto_metric(vap, tmpproto); 3636 if (error == 0) 3637 error = ENETRESET; 3638 } 3639 break; 3640 case IEEE80211_IOC_MESH_PR_PATH: 3641 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3642 if (error == 0) { 3643 error = mesh_select_proto_path(vap, tmpproto); 3644 if (error == 0) 3645 error = ENETRESET; 3646 } 3647 break; 3648 default: 3649 return ENOSYS; 3650 } 3651 return error; 3652} 3653IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3654