1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2009 The FreeBSD Foundation 5 * 6 * This software was developed by Rui Paulo under sponsorship from the 7 * FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31/* 32 * IEEE 802.11s Mesh Point (MBSS) support. 33 * 34 * Based on March 2009, D3.0 802.11s draft spec. 35 */ 36#include "opt_inet.h" 37#include "opt_wlan.h" 38 39#include <sys/param.h> 40#include <sys/systm.h> 41#include <sys/mbuf.h> 42#include <sys/malloc.h> 43#include <sys/kernel.h> 44 45#include <sys/socket.h> 46#include <sys/sockio.h> 47#include <sys/endian.h> 48#include <sys/errno.h> 49#include <sys/proc.h> 50#include <sys/sysctl.h> 51 52#include <net/bpf.h> 53#include <net/if.h> 54#include <net/if_var.h> 55#include <net/if_media.h> 56#include <net/if_llc.h> 57#include <net/if_private.h> 58#include <net/ethernet.h> 59 60#include <net80211/ieee80211_var.h> 61#include <net80211/ieee80211_action.h> 62#ifdef IEEE80211_SUPPORT_SUPERG 63#include <net80211/ieee80211_superg.h> 64#endif 65#include <net80211/ieee80211_input.h> 66#include <net80211/ieee80211_mesh.h> 67 68static void mesh_rt_flush_invalid(struct ieee80211vap *); 69static int mesh_select_proto_path(struct ieee80211vap *, const char *); 70static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 71static void mesh_vattach(struct ieee80211vap *); 72static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 73static void mesh_rt_cleanup_cb(void *); 74static void mesh_gatemode_setup(struct ieee80211vap *); 75static void mesh_gatemode_cb(void *); 76static void mesh_linkchange(struct ieee80211_node *, 77 enum ieee80211_mesh_mlstate); 78static void mesh_checkid(void *, struct ieee80211_node *); 79static uint32_t mesh_generateid(struct ieee80211vap *); 80static int mesh_checkpseq(struct ieee80211vap *, 81 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 82static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, 83 struct ieee80211_mesh_route *); 84static void mesh_forward(struct ieee80211vap *, struct mbuf *, 85 const struct ieee80211_meshcntl *); 86static int mesh_input(struct ieee80211_node *, struct mbuf *, 87 const struct ieee80211_rx_stats *rxs, int, int); 88static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 89 const struct ieee80211_rx_stats *rxs, 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 | CTLFLAG_MPSAFE, 0, 106 "IEEE 802.11s parameters"); 107static int ieee80211_mesh_gateint = -1; 108SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, 109 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 110 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 111 "mesh gate interval (ms)"); 112static int ieee80211_mesh_retrytimeout = -1; 113SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, 114 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 115 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 116 "Retry timeout (msec)"); 117static int ieee80211_mesh_holdingtimeout = -1; 118 119SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, 120 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 121 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 122 "Holding state timeout (msec)"); 123static int ieee80211_mesh_confirmtimeout = -1; 124SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, 125 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 126 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 127 "Confirm state timeout (msec)"); 128static int ieee80211_mesh_backofftimeout = -1; 129SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, 130 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 131 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 132 "Backoff timeout (msec). This is to throutles peering forever when " 133 "not receiving answer or is rejected by a neighbor"); 134static int ieee80211_mesh_maxretries = 2; 135SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW, 136 &ieee80211_mesh_maxretries, 0, 137 "Maximum retries during peer link establishment"); 138static int ieee80211_mesh_maxholding = 2; 139SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW, 140 &ieee80211_mesh_maxholding, 0, 141 "Maximum times we are allowed to transition to HOLDING state before " 142 "backinoff during peer link establishment"); 143 144static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 145 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 146 147static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 148static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 149static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 150static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 151static ieee80211_recv_action_func mesh_recv_action_meshgate; 152 153static ieee80211_send_action_func mesh_send_action_meshpeering_open; 154static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 155static ieee80211_send_action_func mesh_send_action_meshpeering_close; 156static ieee80211_send_action_func mesh_send_action_meshlmetric; 157static ieee80211_send_action_func mesh_send_action_meshgate; 158 159static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 160 .mpm_descr = "AIRTIME", 161 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 162 .mpm_metric = mesh_airtime_calc, 163}; 164 165static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 166static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 167 168MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 169MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 170MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 171 172/* The longer one of the lifetime should be stored as new lifetime */ 173#define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 174 175MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 176MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 177 178/* 179 * Helper functions to manipulate the Mesh routing table. 180 */ 181 182static struct ieee80211_mesh_route * 183mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 184 const uint8_t dest[IEEE80211_ADDR_LEN]) 185{ 186 struct ieee80211_mesh_route *rt; 187 188 MESH_RT_LOCK_ASSERT(ms); 189 190 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 191 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 192 return rt; 193 } 194 return NULL; 195} 196 197static struct ieee80211_mesh_route * 198mesh_rt_add_locked(struct ieee80211vap *vap, 199 const uint8_t dest[IEEE80211_ADDR_LEN]) 200{ 201 struct ieee80211_mesh_state *ms = vap->iv_mesh; 202 struct ieee80211_mesh_route *rt; 203 204 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 205 ("%s: adding broadcast to the routing table", __func__)); 206 207 MESH_RT_LOCK_ASSERT(ms); 208 209 rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) + 210 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, 211 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 212 if (rt != NULL) { 213 rt->rt_vap = vap; 214 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 215 rt->rt_priv = (void *)ALIGN(&rt[1]); 216 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT"); 217 callout_init(&rt->rt_discovery, 1); 218 rt->rt_updtime = ticks; /* create time */ 219 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 220 } 221 return rt; 222} 223 224struct ieee80211_mesh_route * 225ieee80211_mesh_rt_find(struct ieee80211vap *vap, 226 const uint8_t dest[IEEE80211_ADDR_LEN]) 227{ 228 struct ieee80211_mesh_state *ms = vap->iv_mesh; 229 struct ieee80211_mesh_route *rt; 230 231 MESH_RT_LOCK(ms); 232 rt = mesh_rt_find_locked(ms, dest); 233 MESH_RT_UNLOCK(ms); 234 return rt; 235} 236 237struct ieee80211_mesh_route * 238ieee80211_mesh_rt_add(struct ieee80211vap *vap, 239 const uint8_t dest[IEEE80211_ADDR_LEN]) 240{ 241 struct ieee80211_mesh_state *ms = vap->iv_mesh; 242 struct ieee80211_mesh_route *rt; 243 244 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 245 ("%s: duplicate entry in the routing table", __func__)); 246 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 247 ("%s: adding self to the routing table", __func__)); 248 249 MESH_RT_LOCK(ms); 250 rt = mesh_rt_add_locked(vap, dest); 251 MESH_RT_UNLOCK(ms); 252 return rt; 253} 254 255/* 256 * Update the route lifetime and returns the updated lifetime. 257 * If new_lifetime is zero and route is timedout it will be invalidated. 258 * new_lifetime is in msec 259 */ 260int 261ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 262{ 263 int timesince, now; 264 uint32_t lifetime = 0; 265 266 KASSERT(rt != NULL, ("route is NULL")); 267 268 now = ticks; 269 MESH_RT_ENTRY_LOCK(rt); 270 271 /* dont clobber a proxy entry gated by us */ 272 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 273 MESH_RT_ENTRY_UNLOCK(rt); 274 return rt->rt_lifetime; 275 } 276 277 timesince = ticks_to_msecs(now - rt->rt_updtime); 278 rt->rt_updtime = now; 279 if (timesince >= rt->rt_lifetime) { 280 if (new_lifetime != 0) { 281 rt->rt_lifetime = new_lifetime; 282 } 283 else { 284 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 285 rt->rt_lifetime = 0; 286 } 287 } else { 288 /* update what is left of lifetime */ 289 rt->rt_lifetime = rt->rt_lifetime - timesince; 290 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 291 new_lifetime, rt->rt_lifetime); 292 } 293 lifetime = rt->rt_lifetime; 294 MESH_RT_ENTRY_UNLOCK(rt); 295 296 return lifetime; 297} 298 299/* 300 * Add a proxy route (as needed) for the specified destination. 301 */ 302void 303ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 304 const uint8_t dest[IEEE80211_ADDR_LEN]) 305{ 306 struct ieee80211_mesh_state *ms = vap->iv_mesh; 307 struct ieee80211_mesh_route *rt; 308 309 MESH_RT_LOCK(ms); 310 rt = mesh_rt_find_locked(ms, dest); 311 if (rt == NULL) { 312 rt = mesh_rt_add_locked(vap, dest); 313 if (rt == NULL) { 314 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 315 "%s", "unable to add proxy entry"); 316 vap->iv_stats.is_mesh_rtaddfailed++; 317 } else { 318 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 319 "%s", "add proxy entry"); 320 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 321 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 322 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 323 | IEEE80211_MESHRT_FLAGS_PROXY; 324 } 325 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 326 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 327 ("no proxy flag for poxy entry")); 328 struct ieee80211com *ic = vap->iv_ic; 329 /* 330 * Fix existing entry created by received frames from 331 * stations that have some memory of dest. We also 332 * flush any frames held on the staging queue; delivering 333 * them is too much trouble right now. 334 */ 335 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 336 "%s", "fix proxy entry"); 337 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 338 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 339 | IEEE80211_MESHRT_FLAGS_PROXY; 340 /* XXX belongs in hwmp */ 341 ieee80211_ageq_drain_node(&ic->ic_stageq, 342 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 343 /* XXX stat? */ 344 } 345 MESH_RT_UNLOCK(ms); 346} 347 348static __inline void 349mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 350{ 351 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 352 /* 353 * Grab the lock before destroying it, to be sure no one else 354 * is holding the route. 355 */ 356 MESH_RT_ENTRY_LOCK(rt); 357 callout_drain(&rt->rt_discovery); 358 MESH_RT_ENTRY_LOCK_DESTROY(rt); 359 IEEE80211_FREE(rt, M_80211_MESH_RT); 360} 361 362void 363ieee80211_mesh_rt_del(struct ieee80211vap *vap, 364 const uint8_t dest[IEEE80211_ADDR_LEN]) 365{ 366 struct ieee80211_mesh_state *ms = vap->iv_mesh; 367 struct ieee80211_mesh_route *rt, *next; 368 369 MESH_RT_LOCK(ms); 370 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 371 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 372 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 373 ms->ms_ppath->mpp_senderror(vap, dest, rt, 374 IEEE80211_REASON_MESH_PERR_NO_PROXY); 375 } else { 376 ms->ms_ppath->mpp_senderror(vap, dest, rt, 377 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 378 } 379 mesh_rt_del(ms, rt); 380 MESH_RT_UNLOCK(ms); 381 return; 382 } 383 } 384 MESH_RT_UNLOCK(ms); 385} 386 387void 388ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 389{ 390 struct ieee80211_mesh_state *ms = vap->iv_mesh; 391 struct ieee80211_mesh_route *rt, *next; 392 393 if (ms == NULL) 394 return; 395 MESH_RT_LOCK(ms); 396 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 397 mesh_rt_del(ms, rt); 398 MESH_RT_UNLOCK(ms); 399} 400 401void 402ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 403 const uint8_t peer[IEEE80211_ADDR_LEN]) 404{ 405 struct ieee80211_mesh_state *ms = vap->iv_mesh; 406 struct ieee80211_mesh_route *rt, *next; 407 408 MESH_RT_LOCK(ms); 409 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 410 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 411 mesh_rt_del(ms, rt); 412 } 413 MESH_RT_UNLOCK(ms); 414} 415 416/* 417 * Flush expired routing entries, i.e. those in invalid state for 418 * some time. 419 */ 420static void 421mesh_rt_flush_invalid(struct ieee80211vap *vap) 422{ 423 struct ieee80211_mesh_state *ms = vap->iv_mesh; 424 struct ieee80211_mesh_route *rt, *next; 425 426 if (ms == NULL) 427 return; 428 MESH_RT_LOCK(ms); 429 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 430 /* Discover paths will be deleted by their own callout */ 431 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 432 continue; 433 ieee80211_mesh_rt_update(rt, 0); 434 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 435 mesh_rt_del(ms, rt); 436 } 437 MESH_RT_UNLOCK(ms); 438} 439 440int 441ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 442{ 443 int i, firstempty = -1; 444 445 for (i = 0; i < nitems(mesh_proto_paths); i++) { 446 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 447 IEEE80211_MESH_PROTO_DSZ) == 0) 448 return EEXIST; 449 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 450 firstempty = i; 451 } 452 if (firstempty < 0) 453 return ENOSPC; 454 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 455 mesh_proto_paths[firstempty].mpp_active = 1; 456 return 0; 457} 458 459int 460ieee80211_mesh_register_proto_metric(const struct 461 ieee80211_mesh_proto_metric *mpm) 462{ 463 int i, firstempty = -1; 464 465 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 466 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 467 IEEE80211_MESH_PROTO_DSZ) == 0) 468 return EEXIST; 469 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 470 firstempty = i; 471 } 472 if (firstempty < 0) 473 return ENOSPC; 474 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 475 mesh_proto_metrics[firstempty].mpm_active = 1; 476 return 0; 477} 478 479static int 480mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 481{ 482 struct ieee80211_mesh_state *ms = vap->iv_mesh; 483 int i; 484 485 for (i = 0; i < nitems(mesh_proto_paths); i++) { 486 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 487 ms->ms_ppath = &mesh_proto_paths[i]; 488 return 0; 489 } 490 } 491 return ENOENT; 492} 493 494static int 495mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 496{ 497 struct ieee80211_mesh_state *ms = vap->iv_mesh; 498 int i; 499 500 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 501 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 502 ms->ms_pmetric = &mesh_proto_metrics[i]; 503 return 0; 504 } 505 } 506 return ENOENT; 507} 508 509static void 510mesh_gatemode_setup(struct ieee80211vap *vap) 511{ 512 struct ieee80211_mesh_state *ms = vap->iv_mesh; 513 514 /* 515 * NB: When a mesh gate is running as a ROOT it shall 516 * not send out periodic GANNs but instead mark the 517 * mesh gate flag for the corresponding proactive PREQ 518 * and RANN frames. 519 */ 520 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 521 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 522 callout_drain(&ms->ms_gatetimer); 523 return ; 524 } 525 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 526 mesh_gatemode_cb, vap); 527} 528 529static void 530mesh_gatemode_cb(void *arg) 531{ 532 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 533 struct ieee80211_mesh_state *ms = vap->iv_mesh; 534 struct ieee80211_meshgann_ie gann; 535 536 gann.gann_flags = 0; /* Reserved */ 537 gann.gann_hopcount = 0; 538 gann.gann_ttl = ms->ms_ttl; 539 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 540 gann.gann_seq = ms->ms_gateseq++; 541 gann.gann_interval = ieee80211_mesh_gateint; 542 543 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 544 "send broadcast GANN (seq %u)", gann.gann_seq); 545 546 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 547 IEEE80211_ACTION_MESH_GANN, &gann); 548 mesh_gatemode_setup(vap); 549} 550 551static void 552ieee80211_mesh_init(void) 553{ 554 555 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 556 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 557 558 /* 559 * Setup mesh parameters that depends on the clock frequency. 560 */ 561 ieee80211_mesh_gateint = msecs_to_ticks(10000); 562 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 563 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 564 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 565 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 566 567 /* 568 * Register action frame handlers. 569 */ 570 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 571 IEEE80211_ACTION_MESHPEERING_OPEN, 572 mesh_recv_action_meshpeering_open); 573 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 574 IEEE80211_ACTION_MESHPEERING_CONFIRM, 575 mesh_recv_action_meshpeering_confirm); 576 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 577 IEEE80211_ACTION_MESHPEERING_CLOSE, 578 mesh_recv_action_meshpeering_close); 579 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 580 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 581 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 582 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 583 584 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 585 IEEE80211_ACTION_MESHPEERING_OPEN, 586 mesh_send_action_meshpeering_open); 587 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 588 IEEE80211_ACTION_MESHPEERING_CONFIRM, 589 mesh_send_action_meshpeering_confirm); 590 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 591 IEEE80211_ACTION_MESHPEERING_CLOSE, 592 mesh_send_action_meshpeering_close); 593 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 594 IEEE80211_ACTION_MESH_LMETRIC, 595 mesh_send_action_meshlmetric); 596 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 597 IEEE80211_ACTION_MESH_GANN, 598 mesh_send_action_meshgate); 599 600 /* 601 * Register Airtime Link Metric. 602 */ 603 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 604 605} 606SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 607 608void 609ieee80211_mesh_attach(struct ieee80211com *ic) 610{ 611 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 612} 613 614void 615ieee80211_mesh_detach(struct ieee80211com *ic) 616{ 617} 618 619static void 620mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 621{ 622 struct ieee80211com *ic = ni->ni_ic; 623 uint16_t args[3]; 624 625 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 626 args[0] = ni->ni_mlpid; 627 args[1] = ni->ni_mllid; 628 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 629 ieee80211_send_action(ni, 630 IEEE80211_ACTION_CAT_SELF_PROT, 631 IEEE80211_ACTION_MESHPEERING_CLOSE, 632 args); 633 } 634 callout_drain(&ni->ni_mltimer); 635 /* XXX belongs in hwmp */ 636 ieee80211_ageq_drain_node(&ic->ic_stageq, 637 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 638} 639 640static void 641mesh_vdetach(struct ieee80211vap *vap) 642{ 643 struct ieee80211_mesh_state *ms = vap->iv_mesh; 644 645 callout_drain(&ms->ms_cleantimer); 646 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 647 NULL); 648 ieee80211_mesh_rt_flush(vap); 649 MESH_RT_LOCK_DESTROY(ms); 650 ms->ms_ppath->mpp_vdetach(vap); 651 IEEE80211_FREE(vap->iv_mesh, M_80211_VAP); 652 vap->iv_mesh = NULL; 653} 654 655static void 656mesh_vattach(struct ieee80211vap *vap) 657{ 658 struct ieee80211_mesh_state *ms; 659 vap->iv_newstate = mesh_newstate; 660 vap->iv_input = mesh_input; 661 vap->iv_opdetach = mesh_vdetach; 662 vap->iv_recv_mgmt = mesh_recv_mgmt; 663 vap->iv_recv_ctl = mesh_recv_ctl; 664 ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 665 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 666 if (ms == NULL) { 667 printf("%s: couldn't alloc MBSS state\n", __func__); 668 return; 669 } 670 vap->iv_mesh = ms; 671 ms->ms_seq = 0; 672 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 673 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 674 TAILQ_INIT(&ms->ms_known_gates); 675 TAILQ_INIT(&ms->ms_routes); 676 MESH_RT_LOCK_INIT(ms, "MBSS"); 677 callout_init(&ms->ms_cleantimer, 1); 678 callout_init(&ms->ms_gatetimer, 1); 679 ms->ms_gateseq = 0; 680 mesh_select_proto_metric(vap, "AIRTIME"); 681 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 682 mesh_select_proto_path(vap, "HWMP"); 683 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 684 ms->ms_ppath->mpp_vattach(vap); 685} 686 687/* 688 * IEEE80211_M_MBSS vap state machine handler. 689 */ 690static int 691mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 692{ 693 struct ieee80211_mesh_state *ms = vap->iv_mesh; 694 struct ieee80211com *ic = vap->iv_ic; 695 struct ieee80211_node *ni; 696 enum ieee80211_state ostate; 697 698 IEEE80211_LOCK_ASSERT(ic); 699 700 ostate = vap->iv_state; 701 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 702 __func__, ieee80211_state_name[ostate], 703 ieee80211_state_name[nstate], arg); 704 vap->iv_state = nstate; /* state transition */ 705 if (ostate != IEEE80211_S_SCAN) 706 ieee80211_cancel_scan(vap); /* background scan */ 707 ni = vap->iv_bss; /* NB: no reference held */ 708 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 709 callout_drain(&ms->ms_cleantimer); 710 callout_drain(&ms->ms_gatetimer); 711 } 712 switch (nstate) { 713 case IEEE80211_S_INIT: 714 switch (ostate) { 715 case IEEE80211_S_SCAN: 716 ieee80211_cancel_scan(vap); 717 break; 718 case IEEE80211_S_CAC: 719 ieee80211_dfs_cac_stop(vap); 720 break; 721 case IEEE80211_S_RUN: 722 ieee80211_iterate_nodes(&ic->ic_sta, 723 mesh_vdetach_peers, NULL); 724 break; 725 default: 726 break; 727 } 728 if (ostate != IEEE80211_S_INIT) { 729 /* NB: optimize INIT -> INIT case */ 730 ieee80211_reset_bss(vap); 731 ieee80211_mesh_rt_flush(vap); 732 } 733 break; 734 case IEEE80211_S_SCAN: 735 switch (ostate) { 736 case IEEE80211_S_INIT: 737 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 738 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 739 ms->ms_idlen != 0) { 740 /* 741 * Already have a channel and a mesh ID; bypass 742 * the scan and startup immediately. 743 */ 744 ieee80211_create_ibss(vap, vap->iv_des_chan); 745 break; 746 } 747 /* 748 * Initiate a scan. We can come here as a result 749 * of an IEEE80211_IOC_SCAN_REQ too in which case 750 * the vap will be marked with IEEE80211_FEXT_SCANREQ 751 * and the scan request parameters will be present 752 * in iv_scanreq. Otherwise we do the default. 753 */ 754 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 755 ieee80211_check_scan(vap, 756 vap->iv_scanreq_flags, 757 vap->iv_scanreq_duration, 758 vap->iv_scanreq_mindwell, 759 vap->iv_scanreq_maxdwell, 760 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 761 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 762 } else 763 ieee80211_check_scan_current(vap); 764 break; 765 default: 766 break; 767 } 768 break; 769 case IEEE80211_S_CAC: 770 /* 771 * Start CAC on a DFS channel. We come here when starting 772 * a bss on a DFS channel (see ieee80211_create_ibss). 773 */ 774 ieee80211_dfs_cac_start(vap); 775 break; 776 case IEEE80211_S_RUN: 777 switch (ostate) { 778 case IEEE80211_S_INIT: 779 /* 780 * Already have a channel; bypass the 781 * scan and startup immediately. 782 * Note that ieee80211_create_ibss will call 783 * back to do a RUN->RUN state change. 784 */ 785 ieee80211_create_ibss(vap, 786 ieee80211_ht_adjust_channel(ic, 787 ic->ic_curchan, vap->iv_flags_ht)); 788 /* NB: iv_bss is changed on return */ 789 break; 790 case IEEE80211_S_CAC: 791 /* 792 * NB: This is the normal state change when CAC 793 * expires and no radar was detected; no need to 794 * clear the CAC timer as it's already expired. 795 */ 796 /* fall thru... */ 797 case IEEE80211_S_CSA: 798#if 0 799 /* 800 * Shorten inactivity timer of associated stations 801 * to weed out sta's that don't follow a CSA. 802 */ 803 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 804#endif 805 /* 806 * Update bss node channel to reflect where 807 * we landed after CSA. 808 */ 809 ieee80211_node_set_chan(ni, 810 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 811 ieee80211_htchanflags(ni->ni_chan))); 812 /* XXX bypass debug msgs */ 813 break; 814 case IEEE80211_S_SCAN: 815 case IEEE80211_S_RUN: 816#ifdef IEEE80211_DEBUG 817 if (ieee80211_msg_debug(vap)) { 818 ieee80211_note(vap, 819 "synchronized with %s meshid ", 820 ether_sprintf(ni->ni_meshid)); 821 ieee80211_print_essid(ni->ni_meshid, 822 ni->ni_meshidlen); 823 /* XXX MCS/HT */ 824 printf(" channel %d\n", 825 ieee80211_chan2ieee(ic, ic->ic_curchan)); 826 } 827#endif 828 break; 829 default: 830 break; 831 } 832 ieee80211_node_authorize(ni); 833 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 834 mesh_rt_cleanup_cb, vap); 835 mesh_gatemode_setup(vap); 836 break; 837 default: 838 break; 839 } 840 /* NB: ostate not nstate */ 841 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 842 return 0; 843} 844 845static void 846mesh_rt_cleanup_cb(void *arg) 847{ 848 struct ieee80211vap *vap = arg; 849 struct ieee80211_mesh_state *ms = vap->iv_mesh; 850 851 mesh_rt_flush_invalid(vap); 852 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 853 mesh_rt_cleanup_cb, vap); 854} 855 856/* 857 * Mark a mesh STA as gate and return a pointer to it. 858 * If this is first time, we create a new gate route. 859 * Always update the path route to this mesh gate. 860 */ 861struct ieee80211_mesh_gate_route * 862ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 863 struct ieee80211_mesh_route *rt) 864{ 865 struct ieee80211_mesh_state *ms = vap->iv_mesh; 866 struct ieee80211_mesh_gate_route *gr = NULL, *next; 867 int found = 0; 868 869 MESH_RT_LOCK(ms); 870 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 871 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 872 found = 1; 873 break; 874 } 875 } 876 877 if (!found) { 878 /* New mesh gate add it to known table. */ 879 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 880 "%s", "stored new gate information from pro-PREQ."); 881 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 882 M_80211_MESH_GT_RT, 883 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 884 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 885 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 886 } 887 gr->gr_route = rt; 888 /* TODO: link from path route to gate route */ 889 MESH_RT_UNLOCK(ms); 890 891 return gr; 892} 893 894/* 895 * Helper function to note the Mesh Peer Link FSM change. 896 */ 897static void 898mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 899{ 900 struct ieee80211vap *vap = ni->ni_vap; 901 struct ieee80211_mesh_state *ms = vap->iv_mesh; 902#ifdef IEEE80211_DEBUG 903 static const char *meshlinkstates[] = { 904 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 905 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 906 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 907 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 908 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 909 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 910 }; 911#endif 912 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 913 ni, "peer link: %s -> %s", 914 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 915 916 /* track neighbor count */ 917 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 918 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 919 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 920 ms->ms_neighbors++; 921 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 922 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 923 state != IEEE80211_NODE_MESH_ESTABLISHED) { 924 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 925 ms->ms_neighbors--; 926 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 927 } 928 ni->ni_mlstate = state; 929 switch (state) { 930 case IEEE80211_NODE_MESH_HOLDING: 931 ms->ms_ppath->mpp_peerdown(ni); 932 break; 933 case IEEE80211_NODE_MESH_ESTABLISHED: 934 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 935 break; 936 default: 937 break; 938 } 939} 940 941/* 942 * Helper function to generate a unique local ID required for mesh 943 * peer establishment. 944 */ 945static void 946mesh_checkid(void *arg, struct ieee80211_node *ni) 947{ 948 uint16_t *r = arg; 949 950 if (*r == ni->ni_mllid) 951 *(uint16_t *)arg = 0; 952} 953 954static uint32_t 955mesh_generateid(struct ieee80211vap *vap) 956{ 957 int maxiter = 4; 958 uint16_t r; 959 960 do { 961 net80211_get_random_bytes(&r, 2); 962 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 963 maxiter--; 964 } while (r == 0 && maxiter > 0); 965 return r; 966} 967 968/* 969 * Verifies if we already received this packet by checking its 970 * sequence number. 971 * Returns 0 if the frame is to be accepted, 1 otherwise. 972 */ 973static int 974mesh_checkpseq(struct ieee80211vap *vap, 975 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 976{ 977 struct ieee80211_mesh_route *rt; 978 979 rt = ieee80211_mesh_rt_find(vap, source); 980 if (rt == NULL) { 981 rt = ieee80211_mesh_rt_add(vap, source); 982 if (rt == NULL) { 983 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 984 "%s", "add mcast route failed"); 985 vap->iv_stats.is_mesh_rtaddfailed++; 986 return 1; 987 } 988 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 989 "add mcast route, mesh seqno %d", seq); 990 rt->rt_lastmseq = seq; 991 return 0; 992 } 993 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 994 return 1; 995 } else { 996 rt->rt_lastmseq = seq; 997 return 0; 998 } 999} 1000 1001/* 1002 * Iterate the routing table and locate the next hop. 1003 */ 1004struct ieee80211_node * 1005ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1006 const uint8_t dest[IEEE80211_ADDR_LEN]) 1007{ 1008 struct ieee80211_mesh_route *rt; 1009 1010 rt = ieee80211_mesh_rt_find(vap, dest); 1011 if (rt == NULL) 1012 return NULL; 1013 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1014 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1015 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1016 /* XXX stat */ 1017 return NULL; 1018 } 1019 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1020 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1021 if (rt == NULL) return NULL; 1022 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1023 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1024 "%s: meshgate !valid, flags 0x%x", __func__, 1025 rt->rt_flags); 1026 /* XXX stat */ 1027 return NULL; 1028 } 1029 } 1030 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1031} 1032 1033static void 1034mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1035 struct ieee80211_mesh_route *rt_gate) 1036{ 1037 struct ifnet *ifp = vap->iv_ifp; 1038 struct ieee80211_node *ni; 1039 1040 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1041 1042 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1043 if (ni == NULL) { 1044 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1045 m_freem(m); 1046 return; 1047 } 1048 1049 /* 1050 * Send through the VAP packet transmit path. 1051 * This consumes the node ref grabbed above and 1052 * the mbuf, regardless of whether there's a problem 1053 * or not. 1054 */ 1055 (void) ieee80211_vap_pkt_send_dest(vap, m, ni); 1056} 1057 1058/* 1059 * Forward the queued frames to known valid mesh gates. 1060 * Assume destination to be outside the MBSS (i.e. proxy entry), 1061 * If no valid mesh gates are known silently discard queued frames. 1062 * After transmitting frames to all known valid mesh gates, this route 1063 * will be marked invalid, and a new path discovery will happen in the hopes 1064 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1065 */ 1066void 1067ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1068 struct ieee80211_mesh_route *rt_dest) 1069{ 1070 struct ieee80211com *ic = vap->iv_ic; 1071 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1072 struct ieee80211_mesh_route *rt_gate; 1073 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1074 struct mbuf *m, *mcopy, *next; 1075 1076 IEEE80211_TX_UNLOCK_ASSERT(ic); 1077 1078 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1079 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1080 1081 /* XXX: send to more than one valid mash gate */ 1082 MESH_RT_LOCK(ms); 1083 1084 m = ieee80211_ageq_remove(&ic->ic_stageq, 1085 (struct ieee80211_node *)(uintptr_t) 1086 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1087 1088 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1089 rt_gate = gr->gr_route; 1090 if (rt_gate == NULL) { 1091 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1092 rt_dest->rt_dest, 1093 "mesh gate with no path %6D", 1094 gr->gr_addr, ":"); 1095 continue; 1096 } 1097 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1098 continue; 1099 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1100 ("route not marked as a mesh gate")); 1101 KASSERT((rt_gate->rt_flags & 1102 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1103 ("found mesh gate that is also marked porxy")); 1104 /* 1105 * convert route to a proxy route gated by the current 1106 * mesh gate, this is needed so encap can built data 1107 * frame with correct address. 1108 */ 1109 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1110 IEEE80211_MESHRT_FLAGS_VALID; 1111 rt_dest->rt_ext_seq = 1; /* random value */ 1112 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1113 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1114 rt_dest->rt_metric = rt_gate->rt_metric; 1115 rt_dest->rt_nhops = rt_gate->rt_nhops; 1116 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1117 MESH_RT_UNLOCK(ms); 1118 /* XXX: lock?? */ 1119 mcopy = m_dup(m, IEEE80211_M_NOWAIT); 1120 for (; mcopy != NULL; mcopy = next) { 1121 next = mcopy->m_nextpkt; 1122 mcopy->m_nextpkt = NULL; 1123 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1124 rt_dest->rt_dest, 1125 "flush queued frame %p len %d", mcopy, 1126 mcopy->m_pkthdr.len); 1127 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1128 } 1129 MESH_RT_LOCK(ms); 1130 } 1131 rt_dest->rt_flags = 0; /* Mark invalid */ 1132 m_freem(m); 1133 MESH_RT_UNLOCK(ms); 1134} 1135 1136/* 1137 * Forward the specified frame. 1138 * Decrement the TTL and set TA to our MAC address. 1139 */ 1140static void 1141mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1142 const struct ieee80211_meshcntl *mc) 1143{ 1144 struct ieee80211com *ic = vap->iv_ic; 1145 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1146 struct ifnet *ifp = vap->iv_ifp; 1147 const struct ieee80211_frame *wh = 1148 mtod(m, const struct ieee80211_frame *); 1149 struct mbuf *mcopy; 1150 struct ieee80211_meshcntl *mccopy; 1151 struct ieee80211_frame *whcopy; 1152 struct ieee80211_node *ni; 1153 int err; 1154 1155 /* This is called from the RX path - don't hold this lock */ 1156 IEEE80211_TX_UNLOCK_ASSERT(ic); 1157 1158 /* 1159 * mesh ttl of 1 means we are the last one receiving it, 1160 * according to amendment we decrement and then check if 1161 * 0, if so we dont forward. 1162 */ 1163 if (mc->mc_ttl < 1) { 1164 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1165 "%s", "frame not fwd'd, ttl 1"); 1166 vap->iv_stats.is_mesh_fwd_ttl++; 1167 return; 1168 } 1169 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1170 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1171 "%s", "frame not fwd'd, fwding disabled"); 1172 vap->iv_stats.is_mesh_fwd_disabled++; 1173 return; 1174 } 1175 mcopy = m_dup(m, IEEE80211_M_NOWAIT); 1176 if (mcopy == NULL) { 1177 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1178 "%s", "frame not fwd'd, cannot dup"); 1179 vap->iv_stats.is_mesh_fwd_nobuf++; 1180 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1181 return; 1182 } 1183 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1184 sizeof(struct ieee80211_meshcntl)); 1185 if (mcopy == NULL) { 1186 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1187 "%s", "frame not fwd'd, too short"); 1188 vap->iv_stats.is_mesh_fwd_tooshort++; 1189 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1190 m_freem(mcopy); 1191 return; 1192 } 1193 whcopy = mtod(mcopy, struct ieee80211_frame *); 1194 mccopy = (struct ieee80211_meshcntl *) 1195 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1196 /* XXX clear other bits? */ 1197 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1198 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1199 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1200 ni = ieee80211_ref_node(vap->iv_bss); 1201 mcopy->m_flags |= M_MCAST; 1202 } else { 1203 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1204 if (ni == NULL) { 1205 /* 1206 * [Optional] any of the following three actions: 1207 * o silently discard 1208 * o trigger a path discovery 1209 * o inform TA that meshDA is unknown. 1210 */ 1211 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1212 "%s", "frame not fwd'd, no path"); 1213 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1214 IEEE80211_REASON_MESH_PERR_NO_FI); 1215 vap->iv_stats.is_mesh_fwd_nopath++; 1216 m_freem(mcopy); 1217 return; 1218 } 1219 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1220 } 1221 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1222 mccopy->mc_ttl--; 1223 1224 /* XXX calculate priority so drivers can find the tx queue */ 1225 M_WME_SETAC(mcopy, WME_AC_BE); 1226 1227 /* XXX do we know m_nextpkt is NULL? */ 1228 MPASS((mcopy->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0); 1229 mcopy->m_pkthdr.rcvif = (void *) ni; 1230 1231 /* 1232 * XXX this bypasses all of the VAP TX handling; it passes frames 1233 * directly to the parent interface. 1234 * 1235 * Because of this, there's no TX lock being held as there's no 1236 * encaps state being used. 1237 * 1238 * Doing a direct parent transmit may not be the correct thing 1239 * to do here; we'll have to re-think this soon. 1240 */ 1241 IEEE80211_TX_LOCK(ic); 1242 err = ieee80211_parent_xmitpkt(ic, mcopy); 1243 IEEE80211_TX_UNLOCK(ic); 1244 if (!err) 1245 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1246} 1247 1248static struct mbuf * 1249mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1250{ 1251#define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1252#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1253 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1254 sizeof(struct ieee80211_meshcntl_ae10)]; 1255 const struct ieee80211_qosframe_addr4 *wh; 1256 const struct ieee80211_meshcntl_ae10 *mc; 1257 struct ether_header *eh; 1258 struct llc *llc; 1259 int ae; 1260 1261 if (m->m_len < hdrlen + sizeof(*llc) && 1262 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1263 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1264 "discard data frame: %s", "m_pullup failed"); 1265 vap->iv_stats.is_rx_tooshort++; 1266 return NULL; 1267 } 1268 memcpy(b, mtod(m, caddr_t), hdrlen); 1269 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1270 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1271 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1272 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1273 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1274 1275 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1276 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1277 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1278 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1279 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1280 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1281 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1282 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1283 llc = NULL; 1284 } else { 1285 m_adj(m, hdrlen - sizeof(*eh)); 1286 } 1287 eh = mtod(m, struct ether_header *); 1288 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1289 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1290 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1291 if (ae == IEEE80211_MESH_AE_00) { 1292 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1293 } else if (ae == IEEE80211_MESH_AE_01) { 1294 IEEE80211_ADDR_COPY(eh->ether_shost, 1295 MC01(mc)->mc_addr4); 1296 } else { 1297 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1298 (const struct ieee80211_frame *)wh, NULL, 1299 "bad AE %d", ae); 1300 vap->iv_stats.is_mesh_badae++; 1301 m_freem(m); 1302 return NULL; 1303 } 1304 } else { 1305 if (ae == IEEE80211_MESH_AE_00) { 1306 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1307 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1308 } else if (ae == IEEE80211_MESH_AE_10) { 1309 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1310 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1311 } else { 1312 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1313 (const struct ieee80211_frame *)wh, NULL, 1314 "bad AE %d", ae); 1315 vap->iv_stats.is_mesh_badae++; 1316 m_freem(m); 1317 return NULL; 1318 } 1319 } 1320#ifndef __NO_STRICT_ALIGNMENT 1321 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1322 m = ieee80211_realign(vap, m, sizeof(*eh)); 1323 if (m == NULL) 1324 return NULL; 1325 } 1326#endif /* !__NO_STRICT_ALIGNMENT */ 1327 if (llc != NULL) { 1328 eh = mtod(m, struct ether_header *); 1329 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1330 } 1331 return m; 1332#undef WDIR 1333#undef MC01 1334} 1335 1336/* 1337 * Return non-zero if the unicast mesh data frame should be processed 1338 * locally. Frames that are not proxy'd have our address, otherwise 1339 * we need to consult the routing table to look for a proxy entry. 1340 */ 1341static __inline int 1342mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1343 const struct ieee80211_meshcntl *mc) 1344{ 1345 int ae = mc->mc_flags & 3; 1346 1347 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1348 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1349 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1350 ("bad AE %d", ae)); 1351 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1352 const struct ieee80211_meshcntl_ae10 *mc10 = 1353 (const struct ieee80211_meshcntl_ae10 *) mc; 1354 struct ieee80211_mesh_route *rt = 1355 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1356 /* check for proxy route to ourself */ 1357 return (rt != NULL && 1358 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1359 } else /* ucast w/o proxy */ 1360 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1361} 1362 1363/* 1364 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1365 * > 0 means we have forwarded data and no need to process locally 1366 * == 0 means we want to process locally (and we may have forwarded data 1367 * < 0 means there was an error and data should be discarded 1368 */ 1369static int 1370mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1371 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1372{ 1373 struct ieee80211_qosframe_addr4 *qwh; 1374 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1375 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1376 1377 /* This is called from the RX path - don't hold this lock */ 1378 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1379 1380 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1381 1382 /* 1383 * TODO: 1384 * o verify addr2 is a legitimate transmitter 1385 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1386 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1387 */ 1388 1389 /* set lifetime of addr3 (meshDA) to initial value */ 1390 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1391 if (rt_meshda == NULL) { 1392 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1393 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1394 /* 1395 * [Optional] any of the following three actions: 1396 * o silently discard [X] 1397 * o trigger a path discovery [ ] 1398 * o inform TA that meshDA is unknown. [ ] 1399 */ 1400 /* XXX: stats */ 1401 return (-1); 1402 } 1403 1404 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1405 ms->ms_ppath->mpp_inact)); 1406 1407 /* set lifetime of addr4 (meshSA) to initial value */ 1408 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1409 KASSERT(rt_meshsa != NULL, ("no route")); 1410 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1411 ms->ms_ppath->mpp_inact)); 1412 1413 mesh_forward(vap, m, mc); 1414 return (1); /* dont process locally */ 1415} 1416 1417/* 1418 * Verifies transmitter, updates lifetime, precursor list and process data 1419 * locally, if data is proxy with AE = 10 it could mean data should go 1420 * on another mesh path or data should be forwarded to the DS. 1421 * 1422 * > 0 means we have forwarded data and no need to process locally 1423 * == 0 means we want to process locally (and we may have forwarded data 1424 * < 0 means there was an error and data should be discarded 1425 */ 1426static int 1427mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1428 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1429{ 1430 struct ieee80211_qosframe_addr4 *qwh; 1431 const struct ieee80211_meshcntl_ae10 *mc10; 1432 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1433 struct ieee80211_mesh_route *rt; 1434 int ae; 1435 1436 /* This is called from the RX path - don't hold this lock */ 1437 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1438 1439 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1440 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1441 1442 /* 1443 * TODO: 1444 * o verify addr2 is a legitimate transmitter 1445 * o lifetime of precursor entry is max(init, curr) 1446 */ 1447 1448 /* set lifetime of addr4 (meshSA) to initial value */ 1449 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1450 KASSERT(rt != NULL, ("no route")); 1451 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1452 rt = NULL; 1453 1454 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1455 KASSERT(ae == IEEE80211_MESH_AE_00 || 1456 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1457 if (ae == IEEE80211_MESH_AE_10) { 1458 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1459 return (0); /* process locally */ 1460 } 1461 1462 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1463 if (rt != NULL && 1464 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1465 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1466 /* 1467 * Forward on another mesh-path, according to 1468 * amendment as specified in 9.32.4.1 1469 */ 1470 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1471 mesh_forward(vap, m, 1472 (const struct ieee80211_meshcntl *)mc10); 1473 return (1); /* dont process locally */ 1474 } 1475 /* 1476 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1477 * addressed according to 13.11.3.2. 1478 */ 1479 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1480 "forward frame to DS, SA(%6D) DA(%6D)", 1481 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1482 } 1483 return (0); /* process locally */ 1484} 1485 1486/* 1487 * Try to forward the group addressed data on to other mesh STAs, and 1488 * also to the DS. 1489 * 1490 * > 0 means we have forwarded data and no need to process locally 1491 * == 0 means we want to process locally (and we may have forwarded data 1492 * < 0 means there was an error and data should be discarded 1493 */ 1494static int 1495mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1496 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1497{ 1498#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1499 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1500 1501 /* This is called from the RX path - don't hold this lock */ 1502 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1503 1504 mesh_forward(vap, m, mc); 1505 1506 if(mc->mc_ttl > 0) { 1507 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1508 /* 1509 * Forward of MSDUs from the MBSS to DS group addressed 1510 * (according to 13.11.3.2) 1511 * This happens by delivering the packet, and a bridge 1512 * will sent it on another port member. 1513 */ 1514 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1515 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) { 1516 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1517 MC01(mc)->mc_addr4, "%s", 1518 "forward from MBSS to the DS"); 1519 } 1520 } 1521 } 1522 return (0); /* process locally */ 1523#undef MC01 1524} 1525 1526static int 1527mesh_input(struct ieee80211_node *ni, struct mbuf *m, 1528 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1529{ 1530#define HAS_SEQ(type) ((type & 0x4) == 0) 1531#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1532 struct ieee80211vap *vap = ni->ni_vap; 1533 struct ieee80211com *ic = ni->ni_ic; 1534 struct ifnet *ifp = vap->iv_ifp; 1535 struct ieee80211_frame *wh; 1536 const struct ieee80211_meshcntl *mc; 1537 int hdrspace, meshdrlen, need_tap, error; 1538 uint8_t dir, type, subtype, ae; 1539 uint32_t seq; 1540 const uint8_t *addr; 1541 uint8_t qos[2]; 1542 1543 KASSERT(ni != NULL, ("null node")); 1544 ni->ni_inact = ni->ni_inact_reload; 1545 1546 need_tap = 1; /* mbuf need to be tapped. */ 1547 type = -1; /* undefined */ 1548 1549 /* This is called from the RX path - don't hold this lock */ 1550 IEEE80211_TX_UNLOCK_ASSERT(ic); 1551 1552 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1553 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1554 ni->ni_macaddr, NULL, 1555 "too short (1): len %u", m->m_pkthdr.len); 1556 vap->iv_stats.is_rx_tooshort++; 1557 goto out; 1558 } 1559 /* 1560 * Bit of a cheat here, we use a pointer for a 3-address 1561 * frame format but don't reference fields past outside 1562 * ieee80211_frame_min w/o first validating the data is 1563 * present. 1564 */ 1565 wh = mtod(m, struct ieee80211_frame *); 1566 1567 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1568 IEEE80211_FC0_VERSION_0) { 1569 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1570 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1571 vap->iv_stats.is_rx_badversion++; 1572 goto err; 1573 } 1574 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1575 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1576 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1577 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1578 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1579 ni->ni_noise = nf; 1580 if (HAS_SEQ(type)) { 1581 uint8_t tid = ieee80211_gettid(wh); 1582 1583 if (IEEE80211_QOS_HAS_SEQ(wh) && 1584 TID_TO_WME_AC(tid) >= WME_AC_VI) 1585 ic->ic_wme.wme_hipri_traffic++; 1586 if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs)) 1587 goto out; 1588 } 1589 } 1590#ifdef IEEE80211_DEBUG 1591 /* 1592 * It's easier, but too expensive, to simulate different mesh 1593 * topologies by consulting the ACL policy very early, so do this 1594 * only under DEBUG. 1595 * 1596 * NB: this check is also done upon peering link initiation. 1597 */ 1598 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1599 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1600 wh, NULL, "%s", "disallowed by ACL"); 1601 vap->iv_stats.is_rx_acl++; 1602 goto out; 1603 } 1604#endif 1605 switch (type) { 1606 case IEEE80211_FC0_TYPE_DATA: 1607 if (ni == vap->iv_bss) 1608 goto out; 1609 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1610 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1611 ni->ni_macaddr, NULL, 1612 "peer link not yet established (%d)", 1613 ni->ni_mlstate); 1614 vap->iv_stats.is_mesh_nolink++; 1615 goto out; 1616 } 1617 if (dir != IEEE80211_FC1_DIR_FROMDS && 1618 dir != IEEE80211_FC1_DIR_DSTODS) { 1619 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1620 wh, "data", "incorrect dir 0x%x", dir); 1621 vap->iv_stats.is_rx_wrongdir++; 1622 goto err; 1623 } 1624 1625 /* All Mesh data frames are QoS subtype */ 1626 if (!HAS_SEQ(type)) { 1627 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1628 wh, "data", "incorrect subtype 0x%x", subtype); 1629 vap->iv_stats.is_rx_badsubtype++; 1630 goto err; 1631 } 1632 1633 /* 1634 * Next up, any fragmentation. 1635 * XXX: we defrag before we even try to forward, 1636 * Mesh Control field is not present in sub-sequent 1637 * fragmented frames. This is in contrast to Draft 4.0. 1638 */ 1639 hdrspace = ieee80211_hdrspace(ic, wh); 1640 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1641 m = ieee80211_defrag(ni, m, hdrspace, 0); 1642 if (m == NULL) { 1643 /* Fragment dropped or frame not complete yet */ 1644 goto out; 1645 } 1646 } 1647 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1648 1649 /* 1650 * Now we have a complete Mesh Data frame. 1651 */ 1652 1653 /* 1654 * Only fromDStoDS data frames use 4 address qos frames 1655 * as specified in amendment. Otherwise addr4 is located 1656 * in the Mesh Control field and a 3 address qos frame 1657 * is used. 1658 */ 1659 *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh); 1660 1661 /* 1662 * NB: The mesh STA sets the Mesh Control Present 1663 * subfield to 1 in the Mesh Data frame containing 1664 * an unfragmented MSDU, an A-MSDU, or the first 1665 * fragment of an MSDU. 1666 * After defrag it should always be present. 1667 */ 1668 if (!(qos[1] & IEEE80211_QOS_MC)) { 1669 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1670 ni->ni_macaddr, NULL, 1671 "%s", "Mesh control field not present"); 1672 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1673 goto err; 1674 } 1675 1676 /* pull up enough to get to the mesh control */ 1677 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1678 (m = m_pullup(m, hdrspace + 1679 sizeof(struct ieee80211_meshcntl))) == NULL) { 1680 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1681 ni->ni_macaddr, NULL, 1682 "data too short: expecting %u", hdrspace); 1683 vap->iv_stats.is_rx_tooshort++; 1684 goto out; /* XXX */ 1685 } 1686 /* 1687 * Now calculate the full extent of the headers. Note 1688 * mesh_decap will pull up anything we didn't get 1689 * above when it strips the 802.11 headers. 1690 */ 1691 mc = (const struct ieee80211_meshcntl *) 1692 (mtod(m, const uint8_t *) + hdrspace); 1693 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1694 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1695 ae * IEEE80211_ADDR_LEN; 1696 hdrspace += meshdrlen; 1697 1698 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1699 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1700 (m->m_len < hdrspace) && 1701 ((m = m_pullup(m, hdrspace)) == NULL)) { 1702 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1703 ni->ni_macaddr, NULL, 1704 "data too short: expecting %u", hdrspace); 1705 vap->iv_stats.is_rx_tooshort++; 1706 goto out; /* XXX */ 1707 } 1708 /* XXX: are we sure there is no reallocating after m_pullup? */ 1709 1710 seq = le32dec(mc->mc_seq); 1711 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1712 addr = wh->i_addr3; 1713 else if (ae == IEEE80211_MESH_AE_01) 1714 addr = MC01(mc)->mc_addr4; 1715 else 1716 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1717 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1718 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1719 addr, "data", "%s", "not to me"); 1720 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1721 goto out; 1722 } 1723 if (mesh_checkpseq(vap, addr, seq) != 0) { 1724 vap->iv_stats.is_rx_dup++; 1725 goto out; 1726 } 1727 1728 /* This code "routes" the frame to the right control path */ 1729 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1730 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1731 error = 1732 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1733 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1734 error = mesh_recv_group_data(vap, m, wh, mc); 1735 else 1736 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1737 wh, mc); 1738 } else 1739 error = mesh_recv_group_data(vap, m, wh, mc); 1740 if (error < 0) 1741 goto err; 1742 else if (error > 0) 1743 goto out; 1744 1745 if (ieee80211_radiotap_active_vap(vap)) 1746 ieee80211_radiotap_rx(vap, m); 1747 need_tap = 0; 1748 1749 /* 1750 * Finally, strip the 802.11 header. 1751 */ 1752 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1753 if (m == NULL) { 1754 /* XXX mask bit to check for both */ 1755 /* don't count Null data frames as errors */ 1756 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1757 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1758 goto out; 1759 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1760 ni->ni_macaddr, "data", "%s", "decap error"); 1761 vap->iv_stats.is_rx_decap++; 1762 IEEE80211_NODE_STAT(ni, rx_decap); 1763 goto err; 1764 } 1765 if (qos[0] & IEEE80211_QOS_AMSDU) { 1766 m = ieee80211_decap_amsdu(ni, m); 1767 if (m == NULL) 1768 return IEEE80211_FC0_TYPE_DATA; 1769 } 1770 ieee80211_deliver_data(vap, ni, m); 1771 return type; 1772 case IEEE80211_FC0_TYPE_MGT: 1773 vap->iv_stats.is_rx_mgmt++; 1774 IEEE80211_NODE_STAT(ni, rx_mgmt); 1775 if (dir != IEEE80211_FC1_DIR_NODS) { 1776 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1777 wh, "mgt", "incorrect dir 0x%x", dir); 1778 vap->iv_stats.is_rx_wrongdir++; 1779 goto err; 1780 } 1781 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1782 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1783 ni->ni_macaddr, "mgt", "too short: len %u", 1784 m->m_pkthdr.len); 1785 vap->iv_stats.is_rx_tooshort++; 1786 goto out; 1787 } 1788#ifdef IEEE80211_DEBUG 1789 if ((ieee80211_msg_debug(vap) && 1790 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1791 ieee80211_msg_dumppkts(vap)) { 1792 if_printf(ifp, "received %s from %s rssi %d\n", 1793 ieee80211_mgt_subtype_name(subtype), 1794 ether_sprintf(wh->i_addr2), rssi); 1795 } 1796#endif 1797 if (IEEE80211_IS_PROTECTED(wh)) { 1798 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1799 wh, NULL, "%s", "WEP set but not permitted"); 1800 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1801 goto out; 1802 } 1803 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 1804 goto out; 1805 case IEEE80211_FC0_TYPE_CTL: 1806 vap->iv_stats.is_rx_ctl++; 1807 IEEE80211_NODE_STAT(ni, rx_ctrl); 1808 goto out; 1809 default: 1810 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1811 wh, "bad", "frame type 0x%x", type); 1812 /* should not come here */ 1813 break; 1814 } 1815err: 1816 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1817out: 1818 if (m != NULL) { 1819 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1820 ieee80211_radiotap_rx(vap, m); 1821 m_freem(m); 1822 } 1823 return type; 1824#undef HAS_SEQ 1825#undef MC01 1826} 1827 1828static void 1829mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1830 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1831{ 1832 struct ieee80211vap *vap = ni->ni_vap; 1833 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1834 struct ieee80211com *ic = ni->ni_ic; 1835 struct ieee80211_channel *rxchan = ic->ic_curchan; 1836 struct ieee80211_frame *wh; 1837 struct ieee80211_mesh_route *rt; 1838 uint8_t *frm, *efrm; 1839 1840 wh = mtod(m0, struct ieee80211_frame *); 1841 frm = (uint8_t *)&wh[1]; 1842 efrm = mtod(m0, uint8_t *) + m0->m_len; 1843 switch (subtype) { 1844 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1845 case IEEE80211_FC0_SUBTYPE_BEACON: 1846 { 1847 struct ieee80211_scanparams scan; 1848 struct ieee80211_channel *c; 1849 /* 1850 * We process beacon/probe response 1851 * frames to discover neighbors. 1852 */ 1853 if (rxs != NULL) { 1854 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1855 if (c != NULL) 1856 rxchan = c; 1857 } 1858 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) 1859 return; 1860 /* 1861 * Count frame now that we know it's to be processed. 1862 */ 1863 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1864 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1865 IEEE80211_NODE_STAT(ni, rx_beacons); 1866 } else 1867 IEEE80211_NODE_STAT(ni, rx_proberesp); 1868 /* 1869 * If scanning, just pass information to the scan module. 1870 */ 1871 if (ic->ic_flags & IEEE80211_F_SCAN) { 1872 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1873 /* 1874 * Actively scanning a channel marked passive; 1875 * send a probe request now that we know there 1876 * is 802.11 traffic present. 1877 * 1878 * XXX check if the beacon we recv'd gives 1879 * us what we need and suppress the probe req 1880 */ 1881 ieee80211_probe_curchan(vap, 1); 1882 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1883 } 1884 ieee80211_add_scan(vap, rxchan, &scan, wh, 1885 subtype, rssi, nf); 1886 return; 1887 } 1888 1889 /* The rest of this code assumes we are running */ 1890 if (vap->iv_state != IEEE80211_S_RUN) 1891 return; 1892 /* 1893 * Ignore non-mesh STAs. 1894 */ 1895 if ((scan.capinfo & 1896 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1897 scan.meshid == NULL || scan.meshconf == NULL) { 1898 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1899 wh, "beacon", "%s", "not a mesh sta"); 1900 vap->iv_stats.is_mesh_wrongmesh++; 1901 return; 1902 } 1903 /* 1904 * Ignore STAs for other mesh networks. 1905 */ 1906 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1907 mesh_verify_meshconf(vap, scan.meshconf)) { 1908 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1909 wh, "beacon", "%s", "not for our mesh"); 1910 vap->iv_stats.is_mesh_wrongmesh++; 1911 return; 1912 } 1913 /* 1914 * Peer only based on the current ACL policy. 1915 */ 1916 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1917 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1918 wh, NULL, "%s", "disallowed by ACL"); 1919 vap->iv_stats.is_rx_acl++; 1920 return; 1921 } 1922 /* 1923 * Do neighbor discovery. 1924 */ 1925 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1926 /* 1927 * Create a new entry in the neighbor table. 1928 */ 1929 ni = ieee80211_add_neighbor(vap, wh, &scan); 1930 } 1931 /* 1932 * Automatically peer with discovered nodes if possible. 1933 */ 1934 if (ni != vap->iv_bss && 1935 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1936 switch (ni->ni_mlstate) { 1937 case IEEE80211_NODE_MESH_IDLE: 1938 { 1939 uint16_t args[1]; 1940 1941 /* Wait for backoff callout to reset counter */ 1942 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1943 return; 1944 1945 ni->ni_mlpid = mesh_generateid(vap); 1946 if (ni->ni_mlpid == 0) 1947 return; 1948 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1949 args[0] = ni->ni_mlpid; 1950 ieee80211_send_action(ni, 1951 IEEE80211_ACTION_CAT_SELF_PROT, 1952 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1953 ni->ni_mlrcnt = 0; 1954 mesh_peer_timeout_setup(ni); 1955 break; 1956 } 1957 case IEEE80211_NODE_MESH_ESTABLISHED: 1958 { 1959 /* 1960 * Valid beacon from a peer mesh STA 1961 * bump TA lifetime 1962 */ 1963 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1964 if(rt != NULL) { 1965 ieee80211_mesh_rt_update(rt, 1966 ticks_to_msecs( 1967 ms->ms_ppath->mpp_inact)); 1968 } 1969 break; 1970 } 1971 default: 1972 break; /* ignore */ 1973 } 1974 } 1975 break; 1976 } 1977 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1978 { 1979 uint8_t *ssid, *meshid, *rates, *xrates; 1980 1981 if (vap->iv_state != IEEE80211_S_RUN) { 1982 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1983 wh, NULL, "wrong state %s", 1984 ieee80211_state_name[vap->iv_state]); 1985 vap->iv_stats.is_rx_mgtdiscard++; 1986 return; 1987 } 1988 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1989 /* frame must be directed */ 1990 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1991 wh, NULL, "%s", "not unicast"); 1992 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1993 return; 1994 } 1995 /* 1996 * prreq frame format 1997 * [tlv] ssid 1998 * [tlv] supported rates 1999 * [tlv] extended supported rates 2000 * [tlv] mesh id 2001 */ 2002 ssid = meshid = rates = xrates = NULL; 2003 while (efrm - frm > 1) { 2004 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2005 switch (*frm) { 2006 case IEEE80211_ELEMID_SSID: 2007 ssid = frm; 2008 break; 2009 case IEEE80211_ELEMID_RATES: 2010 rates = frm; 2011 break; 2012 case IEEE80211_ELEMID_XRATES: 2013 xrates = frm; 2014 break; 2015 case IEEE80211_ELEMID_MESHID: 2016 meshid = frm; 2017 break; 2018 } 2019 frm += frm[1] + 2; 2020 } 2021 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2022 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2023 if (xrates != NULL) 2024 IEEE80211_VERIFY_ELEMENT(xrates, 2025 IEEE80211_RATE_MAXSIZE - rates[1], return); 2026 if (meshid != NULL) { 2027 IEEE80211_VERIFY_ELEMENT(meshid, 2028 IEEE80211_MESHID_LEN, return); 2029 /* NB: meshid, not ssid */ 2030 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2031 } 2032 2033 /* XXX find a better class or define it's own */ 2034 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2035 "%s", "recv probe req"); 2036 /* 2037 * Some legacy 11b clients cannot hack a complete 2038 * probe response frame. When the request includes 2039 * only a bare-bones rate set, communicate this to 2040 * the transmit side. 2041 */ 2042 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2043 break; 2044 } 2045 2046 case IEEE80211_FC0_SUBTYPE_ACTION: 2047 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2048 if (ni == vap->iv_bss) { 2049 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2050 wh, NULL, "%s", "unknown node"); 2051 vap->iv_stats.is_rx_mgtdiscard++; 2052 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2053 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2054 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2055 wh, NULL, "%s", "not for us"); 2056 vap->iv_stats.is_rx_mgtdiscard++; 2057 } else if (vap->iv_state != IEEE80211_S_RUN) { 2058 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2059 wh, NULL, "wrong state %s", 2060 ieee80211_state_name[vap->iv_state]); 2061 vap->iv_stats.is_rx_mgtdiscard++; 2062 } else { 2063 if (ieee80211_parse_action(ni, m0) == 0) 2064 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2065 } 2066 break; 2067 2068 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2069 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2070 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2071 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2072 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 2073 case IEEE80211_FC0_SUBTYPE_ATIM: 2074 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2075 case IEEE80211_FC0_SUBTYPE_AUTH: 2076 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2077 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2078 wh, NULL, "%s", "not handled"); 2079 vap->iv_stats.is_rx_mgtdiscard++; 2080 break; 2081 2082 default: 2083 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2084 wh, "mgt", "subtype 0x%x not handled", subtype); 2085 vap->iv_stats.is_rx_badsubtype++; 2086 break; 2087 } 2088} 2089 2090static void 2091mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2092{ 2093 2094 switch (subtype) { 2095 case IEEE80211_FC0_SUBTYPE_BAR: 2096 ieee80211_recv_bar(ni, m); 2097 break; 2098 } 2099} 2100 2101/* 2102 * Parse meshpeering action ie's for MPM frames 2103 */ 2104static const struct ieee80211_meshpeer_ie * 2105mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2106 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2107 const uint8_t *frm, const uint8_t *efrm, 2108 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2109{ 2110 struct ieee80211vap *vap = ni->ni_vap; 2111 const struct ieee80211_meshpeer_ie *mpie; 2112 uint16_t args[3]; 2113 const uint8_t *meshid, *meshconf; 2114 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2115 2116 meshid = meshconf = NULL; 2117 while (efrm - frm > 1) { 2118 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2119 switch (*frm) { 2120 case IEEE80211_ELEMID_MESHID: 2121 meshid = frm; 2122 break; 2123 case IEEE80211_ELEMID_MESHCONF: 2124 meshconf = frm; 2125 break; 2126 case IEEE80211_ELEMID_MESHPEER: 2127 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2128 memset(mp, 0, sizeof(*mp)); 2129 mp->peer_len = mpie->peer_len; 2130 mp->peer_proto = le16dec(&mpie->peer_proto); 2131 mp->peer_llinkid = le16dec(&mpie->peer_llinkid); 2132 switch (subtype) { 2133 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2134 mp->peer_linkid = 2135 le16dec(&mpie->peer_linkid); 2136 break; 2137 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2138 /* NB: peer link ID is optional */ 2139 if (mpie->peer_len == 2140 (IEEE80211_MPM_BASE_SZ + 2)) { 2141 mp->peer_linkid = 0; 2142 mp->peer_rcode = 2143 le16dec(&mpie->peer_linkid); 2144 } else { 2145 mp->peer_linkid = 2146 le16dec(&mpie->peer_linkid); 2147 mp->peer_rcode = 2148 le16dec(&mpie->peer_rcode); 2149 } 2150 break; 2151 } 2152 break; 2153 } 2154 frm += frm[1] + 2; 2155 } 2156 2157 /* 2158 * Verify the contents of the frame. 2159 * If it fails validation, close the peer link. 2160 */ 2161 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2162 sendclose = 1; 2163 IEEE80211_DISCARD(vap, 2164 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2165 wh, NULL, "%s", "MPM validation failed"); 2166 } 2167 2168 /* If meshid is not the same reject any frames type. */ 2169 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2170 sendclose = 1; 2171 IEEE80211_DISCARD(vap, 2172 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2173 wh, NULL, "%s", "not for our mesh"); 2174 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2175 /* 2176 * Standard not clear about this, if we dont ignore 2177 * there will be an endless loop between nodes sending 2178 * CLOSE frames between each other with wrong meshid. 2179 * Discard and timers will bring FSM to IDLE state. 2180 */ 2181 return NULL; 2182 } 2183 } 2184 2185 /* 2186 * Close frames are accepted if meshid is the same. 2187 * Verify the other two types. 2188 */ 2189 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2190 mesh_verify_meshconf(vap, meshconf)) { 2191 sendclose = 1; 2192 IEEE80211_DISCARD(vap, 2193 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2194 wh, NULL, "%s", "configuration mismatch"); 2195 } 2196 2197 if (sendclose) { 2198 vap->iv_stats.is_rx_mgtdiscard++; 2199 switch (ni->ni_mlstate) { 2200 case IEEE80211_NODE_MESH_IDLE: 2201 case IEEE80211_NODE_MESH_ESTABLISHED: 2202 case IEEE80211_NODE_MESH_HOLDING: 2203 /* ignore */ 2204 break; 2205 case IEEE80211_NODE_MESH_OPENSNT: 2206 case IEEE80211_NODE_MESH_OPENRCV: 2207 case IEEE80211_NODE_MESH_CONFIRMRCV: 2208 args[0] = ni->ni_mlpid; 2209 args[1] = ni->ni_mllid; 2210 /* Reason codes for rejection */ 2211 switch (subtype) { 2212 case IEEE80211_ACTION_MESHPEERING_OPEN: 2213 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2214 break; 2215 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2216 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2217 break; 2218 } 2219 ieee80211_send_action(ni, 2220 IEEE80211_ACTION_CAT_SELF_PROT, 2221 IEEE80211_ACTION_MESHPEERING_CLOSE, 2222 args); 2223 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2224 mesh_peer_timeout_setup(ni); 2225 break; 2226 } 2227 return NULL; 2228 } 2229 2230 return (const struct ieee80211_meshpeer_ie *) mp; 2231} 2232 2233static int 2234mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2235 const struct ieee80211_frame *wh, 2236 const uint8_t *frm, const uint8_t *efrm) 2237{ 2238 struct ieee80211vap *vap = ni->ni_vap; 2239 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2240 struct ieee80211_meshpeer_ie ie; 2241 const struct ieee80211_meshpeer_ie *meshpeer; 2242 uint16_t args[3]; 2243 2244 /* +2+2 for action + code + capabilites */ 2245 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2246 IEEE80211_ACTION_MESHPEERING_OPEN); 2247 if (meshpeer == NULL) { 2248 return 0; 2249 } 2250 2251 /* XXX move up */ 2252 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2253 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2254 2255 switch (ni->ni_mlstate) { 2256 case IEEE80211_NODE_MESH_IDLE: 2257 /* Reject open request if reached our maximum neighbor count */ 2258 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2259 args[0] = meshpeer->peer_llinkid; 2260 args[1] = 0; 2261 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2262 ieee80211_send_action(ni, 2263 IEEE80211_ACTION_CAT_SELF_PROT, 2264 IEEE80211_ACTION_MESHPEERING_CLOSE, 2265 args); 2266 /* stay in IDLE state */ 2267 return (0); 2268 } 2269 /* Open frame accepted */ 2270 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2271 ni->ni_mllid = meshpeer->peer_llinkid; 2272 ni->ni_mlpid = mesh_generateid(vap); 2273 if (ni->ni_mlpid == 0) 2274 return 0; /* XXX */ 2275 args[0] = ni->ni_mlpid; 2276 /* Announce we're open too... */ 2277 ieee80211_send_action(ni, 2278 IEEE80211_ACTION_CAT_SELF_PROT, 2279 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2280 /* ...and confirm the link. */ 2281 args[0] = ni->ni_mlpid; 2282 args[1] = ni->ni_mllid; 2283 ieee80211_send_action(ni, 2284 IEEE80211_ACTION_CAT_SELF_PROT, 2285 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2286 args); 2287 mesh_peer_timeout_setup(ni); 2288 break; 2289 case IEEE80211_NODE_MESH_OPENRCV: 2290 /* Wrong Link ID */ 2291 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2292 args[0] = ni->ni_mllid; 2293 args[1] = ni->ni_mlpid; 2294 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2295 ieee80211_send_action(ni, 2296 IEEE80211_ACTION_CAT_SELF_PROT, 2297 IEEE80211_ACTION_MESHPEERING_CLOSE, 2298 args); 2299 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2300 mesh_peer_timeout_setup(ni); 2301 break; 2302 } 2303 /* Duplicate open, confirm again. */ 2304 args[0] = ni->ni_mlpid; 2305 args[1] = ni->ni_mllid; 2306 ieee80211_send_action(ni, 2307 IEEE80211_ACTION_CAT_SELF_PROT, 2308 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2309 args); 2310 break; 2311 case IEEE80211_NODE_MESH_OPENSNT: 2312 ni->ni_mllid = meshpeer->peer_llinkid; 2313 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2314 args[0] = ni->ni_mlpid; 2315 args[1] = ni->ni_mllid; 2316 ieee80211_send_action(ni, 2317 IEEE80211_ACTION_CAT_SELF_PROT, 2318 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2319 args); 2320 /* NB: don't setup/clear any timeout */ 2321 break; 2322 case IEEE80211_NODE_MESH_CONFIRMRCV: 2323 if (ni->ni_mlpid != meshpeer->peer_linkid || 2324 ni->ni_mllid != meshpeer->peer_llinkid) { 2325 args[0] = ni->ni_mlpid; 2326 args[1] = ni->ni_mllid; 2327 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2328 ieee80211_send_action(ni, 2329 IEEE80211_ACTION_CAT_SELF_PROT, 2330 IEEE80211_ACTION_MESHPEERING_CLOSE, 2331 args); 2332 mesh_linkchange(ni, 2333 IEEE80211_NODE_MESH_HOLDING); 2334 mesh_peer_timeout_setup(ni); 2335 break; 2336 } 2337 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2338 ni->ni_mllid = meshpeer->peer_llinkid; 2339 args[0] = ni->ni_mlpid; 2340 args[1] = ni->ni_mllid; 2341 ieee80211_send_action(ni, 2342 IEEE80211_ACTION_CAT_SELF_PROT, 2343 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2344 args); 2345 mesh_peer_timeout_stop(ni); 2346 break; 2347 case IEEE80211_NODE_MESH_ESTABLISHED: 2348 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2349 args[0] = ni->ni_mllid; 2350 args[1] = ni->ni_mlpid; 2351 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2352 ieee80211_send_action(ni, 2353 IEEE80211_ACTION_CAT_SELF_PROT, 2354 IEEE80211_ACTION_MESHPEERING_CLOSE, 2355 args); 2356 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2357 mesh_peer_timeout_setup(ni); 2358 break; 2359 } 2360 args[0] = ni->ni_mlpid; 2361 args[1] = ni->ni_mllid; 2362 ieee80211_send_action(ni, 2363 IEEE80211_ACTION_CAT_SELF_PROT, 2364 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2365 args); 2366 break; 2367 case IEEE80211_NODE_MESH_HOLDING: 2368 args[0] = ni->ni_mlpid; 2369 args[1] = meshpeer->peer_llinkid; 2370 /* Standard not clear about what the reaason code should be */ 2371 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2372 ieee80211_send_action(ni, 2373 IEEE80211_ACTION_CAT_SELF_PROT, 2374 IEEE80211_ACTION_MESHPEERING_CLOSE, 2375 args); 2376 break; 2377 } 2378 return 0; 2379} 2380 2381static int 2382mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2383 const struct ieee80211_frame *wh, 2384 const uint8_t *frm, const uint8_t *efrm) 2385{ 2386 struct ieee80211vap *vap = ni->ni_vap; 2387 struct ieee80211_meshpeer_ie ie; 2388 const struct ieee80211_meshpeer_ie *meshpeer; 2389 uint16_t args[3]; 2390 2391 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2392 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2393 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2394 if (meshpeer == NULL) { 2395 return 0; 2396 } 2397 2398 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2399 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2400 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2401 2402 switch (ni->ni_mlstate) { 2403 case IEEE80211_NODE_MESH_OPENRCV: 2404 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2405 mesh_peer_timeout_stop(ni); 2406 break; 2407 case IEEE80211_NODE_MESH_OPENSNT: 2408 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2409 mesh_peer_timeout_setup(ni); 2410 break; 2411 case IEEE80211_NODE_MESH_HOLDING: 2412 args[0] = ni->ni_mlpid; 2413 args[1] = meshpeer->peer_llinkid; 2414 /* Standard not clear about what the reaason code should be */ 2415 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2416 ieee80211_send_action(ni, 2417 IEEE80211_ACTION_CAT_SELF_PROT, 2418 IEEE80211_ACTION_MESHPEERING_CLOSE, 2419 args); 2420 break; 2421 case IEEE80211_NODE_MESH_CONFIRMRCV: 2422 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2423 args[0] = ni->ni_mlpid; 2424 args[1] = ni->ni_mllid; 2425 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2426 ieee80211_send_action(ni, 2427 IEEE80211_ACTION_CAT_SELF_PROT, 2428 IEEE80211_ACTION_MESHPEERING_CLOSE, 2429 args); 2430 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2431 mesh_peer_timeout_setup(ni); 2432 } 2433 break; 2434 default: 2435 IEEE80211_DISCARD(vap, 2436 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2437 wh, NULL, "received confirm in invalid state %d", 2438 ni->ni_mlstate); 2439 vap->iv_stats.is_rx_mgtdiscard++; 2440 break; 2441 } 2442 return 0; 2443} 2444 2445static int 2446mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2447 const struct ieee80211_frame *wh, 2448 const uint8_t *frm, const uint8_t *efrm) 2449{ 2450 struct ieee80211_meshpeer_ie ie; 2451 const struct ieee80211_meshpeer_ie *meshpeer; 2452 uint16_t args[3]; 2453 2454 /* +2 for action + code */ 2455 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2456 IEEE80211_ACTION_MESHPEERING_CLOSE); 2457 if (meshpeer == NULL) { 2458 return 0; 2459 } 2460 2461 /* 2462 * XXX: check reason code, for example we could receive 2463 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2464 * to peer again. 2465 */ 2466 2467 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2468 ni, "%s", "recv PEER CLOSE"); 2469 2470 switch (ni->ni_mlstate) { 2471 case IEEE80211_NODE_MESH_IDLE: 2472 /* ignore */ 2473 break; 2474 case IEEE80211_NODE_MESH_OPENRCV: 2475 case IEEE80211_NODE_MESH_OPENSNT: 2476 case IEEE80211_NODE_MESH_CONFIRMRCV: 2477 case IEEE80211_NODE_MESH_ESTABLISHED: 2478 args[0] = ni->ni_mlpid; 2479 args[1] = ni->ni_mllid; 2480 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2481 ieee80211_send_action(ni, 2482 IEEE80211_ACTION_CAT_SELF_PROT, 2483 IEEE80211_ACTION_MESHPEERING_CLOSE, 2484 args); 2485 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2486 mesh_peer_timeout_setup(ni); 2487 break; 2488 case IEEE80211_NODE_MESH_HOLDING: 2489 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2490 mesh_peer_timeout_stop(ni); 2491 break; 2492 } 2493 return 0; 2494} 2495 2496/* 2497 * Link Metric handling. 2498 */ 2499static int 2500mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2501 const struct ieee80211_frame *wh, 2502 const uint8_t *frm, const uint8_t *efrm) 2503{ 2504 const struct ieee80211_meshlmetric_ie *ie = 2505 (const struct ieee80211_meshlmetric_ie *) 2506 (frm+2); /* action + code */ 2507 struct ieee80211_meshlmetric_ie lm_rep; 2508 2509 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2510 lm_rep.lm_flags = 0; 2511 lm_rep.lm_metric = mesh_airtime_calc(ni); 2512 ieee80211_send_action(ni, 2513 IEEE80211_ACTION_CAT_MESH, 2514 IEEE80211_ACTION_MESH_LMETRIC, 2515 &lm_rep); 2516 } 2517 /* XXX: else do nothing for now */ 2518 return 0; 2519} 2520 2521/* 2522 * Parse meshgate action ie's for GANN frames. 2523 * Returns -1 if parsing fails, otherwise 0. 2524 */ 2525static int 2526mesh_parse_meshgate_action(struct ieee80211_node *ni, 2527 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2528 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2529{ 2530 struct ieee80211vap *vap = ni->ni_vap; 2531 const struct ieee80211_meshgann_ie *gannie; 2532 2533 while (efrm - frm > 1) { 2534 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2535 switch (*frm) { 2536 case IEEE80211_ELEMID_MESHGANN: 2537 gannie = (const struct ieee80211_meshgann_ie *) frm; 2538 memset(ie, 0, sizeof(*ie)); 2539 ie->gann_ie = gannie->gann_ie; 2540 ie->gann_len = gannie->gann_len; 2541 ie->gann_flags = gannie->gann_flags; 2542 ie->gann_hopcount = gannie->gann_hopcount; 2543 ie->gann_ttl = gannie->gann_ttl; 2544 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2545 ie->gann_seq = le32dec(&gannie->gann_seq); 2546 ie->gann_interval = le16dec(&gannie->gann_interval); 2547 break; 2548 } 2549 frm += frm[1] + 2; 2550 } 2551 2552 return 0; 2553} 2554 2555/* 2556 * Mesh Gate Announcement handling. 2557 */ 2558static int 2559mesh_recv_action_meshgate(struct ieee80211_node *ni, 2560 const struct ieee80211_frame *wh, 2561 const uint8_t *frm, const uint8_t *efrm) 2562{ 2563 struct ieee80211vap *vap = ni->ni_vap; 2564 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2565 struct ieee80211_mesh_gate_route *gr, *next; 2566 struct ieee80211_mesh_route *rt_gate; 2567 struct ieee80211_meshgann_ie pgann; 2568 struct ieee80211_meshgann_ie ie; 2569 int found = 0; 2570 2571 /* +2 for action + code */ 2572 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2573 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2574 ni->ni_macaddr, NULL, "%s", 2575 "GANN parsing failed"); 2576 vap->iv_stats.is_rx_mgtdiscard++; 2577 return (0); 2578 } 2579 2580 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2581 return 0; 2582 2583 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2584 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2585 ie.gann_seq); 2586 2587 if (ms == NULL) 2588 return (0); 2589 MESH_RT_LOCK(ms); 2590 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2591 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2592 continue; 2593 if (ie.gann_seq <= gr->gr_lastseq) { 2594 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2595 ni->ni_macaddr, NULL, 2596 "GANN old seqno %u <= %u", 2597 ie.gann_seq, gr->gr_lastseq); 2598 MESH_RT_UNLOCK(ms); 2599 return (0); 2600 } 2601 /* corresponding mesh gate found & GANN accepted */ 2602 found = 1; 2603 break; 2604 } 2605 if (found == 0) { 2606 /* this GANN is from a new mesh Gate add it to known table. */ 2607 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2608 "stored new GANN information, seq %u.", ie.gann_seq); 2609 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2610 M_80211_MESH_GT_RT, 2611 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2612 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2613 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2614 } 2615 gr->gr_lastseq = ie.gann_seq; 2616 2617 /* check if we have a path to this gate */ 2618 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2619 if (rt_gate != NULL && 2620 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2621 gr->gr_route = rt_gate; 2622 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2623 } 2624 2625 MESH_RT_UNLOCK(ms); 2626 2627 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2628 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2629 return 0; 2630 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2631 pgann.gann_hopcount = ie.gann_hopcount + 1; 2632 pgann.gann_ttl = ie.gann_ttl - 1; 2633 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2634 pgann.gann_seq = ie.gann_seq; 2635 pgann.gann_interval = ie.gann_interval; 2636 2637 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2638 "%s", "propagate GANN"); 2639 2640 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2641 IEEE80211_ACTION_MESH_GANN, &pgann); 2642 2643 return 0; 2644} 2645 2646static int 2647mesh_send_action(struct ieee80211_node *ni, 2648 const uint8_t sa[IEEE80211_ADDR_LEN], 2649 const uint8_t da[IEEE80211_ADDR_LEN], 2650 struct mbuf *m) 2651{ 2652 struct ieee80211vap *vap = ni->ni_vap; 2653 struct ieee80211com *ic = ni->ni_ic; 2654 struct ieee80211_bpf_params params; 2655 int ret; 2656 2657 KASSERT(ni != NULL, ("null node")); 2658 2659 if (vap->iv_state == IEEE80211_S_CAC) { 2660 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2661 "block %s frame in CAC state", "Mesh action"); 2662 vap->iv_stats.is_tx_badstate++; 2663 ieee80211_free_node(ni); 2664 m_freem(m); 2665 return EIO; /* XXX */ 2666 } 2667 2668 M_PREPEND(m, sizeof(struct ieee80211_frame), IEEE80211_M_NOWAIT); 2669 if (m == NULL) { 2670 ieee80211_free_node(ni); 2671 return ENOMEM; 2672 } 2673 2674 IEEE80211_TX_LOCK(ic); 2675 ieee80211_send_setup(ni, m, 2676 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2677 IEEE80211_NONQOS_TID, sa, da, sa); 2678 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2679 2680 memset(¶ms, 0, sizeof(params)); 2681 params.ibp_pri = WME_AC_VO; 2682 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2683 if (IEEE80211_IS_MULTICAST(da)) 2684 params.ibp_try0 = 1; 2685 else 2686 params.ibp_try0 = ni->ni_txparms->maxretry; 2687 params.ibp_power = ni->ni_txpower; 2688 2689 IEEE80211_NODE_STAT(ni, tx_mgmt); 2690 2691 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2692 IEEE80211_TX_UNLOCK(ic); 2693 return (ret); 2694} 2695 2696#define ADDSHORT(frm, v) do { \ 2697 frm[0] = (v) & 0xff; \ 2698 frm[1] = (v) >> 8; \ 2699 frm += 2; \ 2700} while (0) 2701#define ADDWORD(frm, v) do { \ 2702 frm[0] = (v) & 0xff; \ 2703 frm[1] = ((v) >> 8) & 0xff; \ 2704 frm[2] = ((v) >> 16) & 0xff; \ 2705 frm[3] = ((v) >> 24) & 0xff; \ 2706 frm += 4; \ 2707} while (0) 2708 2709static int 2710mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2711 int category, int action, void *args0) 2712{ 2713 struct ieee80211vap *vap = ni->ni_vap; 2714 struct ieee80211com *ic = ni->ni_ic; 2715 uint16_t *args = args0; 2716 const struct ieee80211_rateset *rs; 2717 struct mbuf *m; 2718 uint8_t *frm; 2719 2720 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2721 "send PEER OPEN action: localid 0x%x", args[0]); 2722 2723 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2724 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2725 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2726 ieee80211_ref_node(ni); 2727 2728 m = ieee80211_getmgtframe(&frm, 2729 ic->ic_headroom + sizeof(struct ieee80211_frame), 2730 sizeof(uint16_t) /* action+category */ 2731 + sizeof(uint16_t) /* capabilites */ 2732 + 2 + IEEE80211_RATE_SIZE 2733 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2734 + 2 + IEEE80211_MESHID_LEN 2735 + sizeof(struct ieee80211_meshconf_ie) 2736 + sizeof(struct ieee80211_meshpeer_ie) 2737 ); 2738 if (m != NULL) { 2739 /* 2740 * mesh peer open action frame format: 2741 * [1] category 2742 * [1] action 2743 * [2] capabilities 2744 * [tlv] rates 2745 * [tlv] xrates 2746 * [tlv] mesh id 2747 * [tlv] mesh conf 2748 * [tlv] mesh peer link mgmt 2749 */ 2750 *frm++ = category; 2751 *frm++ = action; 2752 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2753 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2754 frm = ieee80211_add_rates(frm, rs); 2755 frm = ieee80211_add_xrates(frm, rs); 2756 frm = ieee80211_add_meshid(frm, vap); 2757 frm = ieee80211_add_meshconf(frm, vap); 2758 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2759 args[0], 0, 0); 2760 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2761 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2762 } else { 2763 vap->iv_stats.is_tx_nobuf++; 2764 ieee80211_free_node(ni); 2765 return ENOMEM; 2766 } 2767} 2768 2769static int 2770mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2771 int category, int action, void *args0) 2772{ 2773 struct ieee80211vap *vap = ni->ni_vap; 2774 struct ieee80211com *ic = ni->ni_ic; 2775 uint16_t *args = args0; 2776 const struct ieee80211_rateset *rs; 2777 struct mbuf *m; 2778 uint8_t *frm; 2779 2780 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2781 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2782 args[0], args[1]); 2783 2784 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2785 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2786 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2787 ieee80211_ref_node(ni); 2788 2789 m = ieee80211_getmgtframe(&frm, 2790 ic->ic_headroom + sizeof(struct ieee80211_frame), 2791 sizeof(uint16_t) /* action+category */ 2792 + sizeof(uint16_t) /* capabilites */ 2793 + sizeof(uint16_t) /* status code */ 2794 + sizeof(uint16_t) /* AID */ 2795 + 2 + IEEE80211_RATE_SIZE 2796 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2797 + 2 + IEEE80211_MESHID_LEN 2798 + sizeof(struct ieee80211_meshconf_ie) 2799 + sizeof(struct ieee80211_meshpeer_ie) 2800 ); 2801 if (m != NULL) { 2802 /* 2803 * mesh peer confirm action frame format: 2804 * [1] category 2805 * [1] action 2806 * [2] capabilities 2807 * [2] status code 2808 * [2] association id (peer ID) 2809 * [tlv] rates 2810 * [tlv] xrates 2811 * [tlv] mesh id 2812 * [tlv] mesh conf 2813 * [tlv] mesh peer link mgmt 2814 */ 2815 *frm++ = category; 2816 *frm++ = action; 2817 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2818 ADDSHORT(frm, 0); /* status code */ 2819 ADDSHORT(frm, args[1]); /* AID */ 2820 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2821 frm = ieee80211_add_rates(frm, rs); 2822 frm = ieee80211_add_xrates(frm, rs); 2823 frm = ieee80211_add_meshid(frm, vap); 2824 frm = ieee80211_add_meshconf(frm, vap); 2825 frm = ieee80211_add_meshpeer(frm, 2826 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2827 args[0], args[1], 0); 2828 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2829 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2830 } else { 2831 vap->iv_stats.is_tx_nobuf++; 2832 ieee80211_free_node(ni); 2833 return ENOMEM; 2834 } 2835} 2836 2837static int 2838mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2839 int category, int action, void *args0) 2840{ 2841 struct ieee80211vap *vap = ni->ni_vap; 2842 struct ieee80211com *ic = ni->ni_ic; 2843 uint16_t *args = args0; 2844 struct mbuf *m; 2845 uint8_t *frm; 2846 2847 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2848 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)", 2849 args[0], args[1], args[2], ieee80211_reason_to_string(args[2])); 2850 2851 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2852 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2853 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2854 ieee80211_ref_node(ni); 2855 2856 m = ieee80211_getmgtframe(&frm, 2857 ic->ic_headroom + sizeof(struct ieee80211_frame), 2858 sizeof(uint16_t) /* action+category */ 2859 + sizeof(uint16_t) /* reason code */ 2860 + 2 + IEEE80211_MESHID_LEN 2861 + sizeof(struct ieee80211_meshpeer_ie) 2862 ); 2863 if (m != NULL) { 2864 /* 2865 * mesh peer close action frame format: 2866 * [1] category 2867 * [1] action 2868 * [tlv] mesh id 2869 * [tlv] mesh peer link mgmt 2870 */ 2871 *frm++ = category; 2872 *frm++ = action; 2873 frm = ieee80211_add_meshid(frm, vap); 2874 frm = ieee80211_add_meshpeer(frm, 2875 IEEE80211_ACTION_MESHPEERING_CLOSE, 2876 args[0], args[1], args[2]); 2877 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2878 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2879 } else { 2880 vap->iv_stats.is_tx_nobuf++; 2881 ieee80211_free_node(ni); 2882 return ENOMEM; 2883 } 2884} 2885 2886static int 2887mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2888 int category, int action, void *arg0) 2889{ 2890 struct ieee80211vap *vap = ni->ni_vap; 2891 struct ieee80211com *ic = ni->ni_ic; 2892 struct ieee80211_meshlmetric_ie *ie = arg0; 2893 struct mbuf *m; 2894 uint8_t *frm; 2895 2896 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2897 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2898 ni, "%s", "send LINK METRIC REQUEST action"); 2899 } else { 2900 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2901 ni, "send LINK METRIC REPLY action: metric 0x%x", 2902 ie->lm_metric); 2903 } 2904 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2905 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2906 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2907 ieee80211_ref_node(ni); 2908 2909 m = ieee80211_getmgtframe(&frm, 2910 ic->ic_headroom + sizeof(struct ieee80211_frame), 2911 sizeof(uint16_t) + /* action+category */ 2912 sizeof(struct ieee80211_meshlmetric_ie) 2913 ); 2914 if (m != NULL) { 2915 /* 2916 * mesh link metric 2917 * [1] category 2918 * [1] action 2919 * [tlv] mesh link metric 2920 */ 2921 *frm++ = category; 2922 *frm++ = action; 2923 frm = ieee80211_add_meshlmetric(frm, 2924 ie->lm_flags, ie->lm_metric); 2925 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2926 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2927 } else { 2928 vap->iv_stats.is_tx_nobuf++; 2929 ieee80211_free_node(ni); 2930 return ENOMEM; 2931 } 2932} 2933 2934static int 2935mesh_send_action_meshgate(struct ieee80211_node *ni, 2936 int category, int action, void *arg0) 2937{ 2938 struct ieee80211vap *vap = ni->ni_vap; 2939 struct ieee80211com *ic = ni->ni_ic; 2940 struct ieee80211_meshgann_ie *ie = arg0; 2941 struct mbuf *m; 2942 uint8_t *frm; 2943 2944 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2945 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2946 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2947 ieee80211_ref_node(ni); 2948 2949 m = ieee80211_getmgtframe(&frm, 2950 ic->ic_headroom + sizeof(struct ieee80211_frame), 2951 sizeof(uint16_t) + /* action+category */ 2952 IEEE80211_MESHGANN_BASE_SZ 2953 ); 2954 if (m != NULL) { 2955 /* 2956 * mesh link metric 2957 * [1] category 2958 * [1] action 2959 * [tlv] mesh gate announcement 2960 */ 2961 *frm++ = category; 2962 *frm++ = action; 2963 frm = ieee80211_add_meshgate(frm, ie); 2964 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2965 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 2966 } else { 2967 vap->iv_stats.is_tx_nobuf++; 2968 ieee80211_free_node(ni); 2969 return ENOMEM; 2970 } 2971} 2972 2973static void 2974mesh_peer_timeout_setup(struct ieee80211_node *ni) 2975{ 2976 switch (ni->ni_mlstate) { 2977 case IEEE80211_NODE_MESH_HOLDING: 2978 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 2979 break; 2980 case IEEE80211_NODE_MESH_CONFIRMRCV: 2981 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 2982 break; 2983 case IEEE80211_NODE_MESH_IDLE: 2984 ni->ni_mltval = 0; 2985 break; 2986 default: 2987 ni->ni_mltval = ieee80211_mesh_retrytimeout; 2988 break; 2989 } 2990 if (ni->ni_mltval) 2991 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2992 mesh_peer_timeout_cb, ni); 2993} 2994 2995/* 2996 * Same as above but backoffs timer statisically 50%. 2997 */ 2998static void 2999mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3000{ 3001 uint32_t r; 3002 3003 r = arc4random(); 3004 ni->ni_mltval += r % ni->ni_mltval; 3005 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3006 ni); 3007} 3008 3009static __inline void 3010mesh_peer_timeout_stop(struct ieee80211_node *ni) 3011{ 3012 callout_drain(&ni->ni_mltimer); 3013} 3014 3015static void 3016mesh_peer_backoff_cb(void *arg) 3017{ 3018 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3019 3020 /* After backoff timeout, try to peer automatically again. */ 3021 ni->ni_mlhcnt = 0; 3022} 3023 3024/* 3025 * Mesh Peer Link Management FSM timeout handling. 3026 */ 3027static void 3028mesh_peer_timeout_cb(void *arg) 3029{ 3030 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3031 uint16_t args[3]; 3032 3033 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3034 ni, "mesh link timeout, state %d, retry counter %d", 3035 ni->ni_mlstate, ni->ni_mlrcnt); 3036 3037 switch (ni->ni_mlstate) { 3038 case IEEE80211_NODE_MESH_IDLE: 3039 case IEEE80211_NODE_MESH_ESTABLISHED: 3040 break; 3041 case IEEE80211_NODE_MESH_OPENSNT: 3042 case IEEE80211_NODE_MESH_OPENRCV: 3043 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3044 args[0] = ni->ni_mlpid; 3045 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3046 ieee80211_send_action(ni, 3047 IEEE80211_ACTION_CAT_SELF_PROT, 3048 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3049 ni->ni_mlrcnt = 0; 3050 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3051 mesh_peer_timeout_setup(ni); 3052 } else { 3053 args[0] = ni->ni_mlpid; 3054 ieee80211_send_action(ni, 3055 IEEE80211_ACTION_CAT_SELF_PROT, 3056 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3057 ni->ni_mlrcnt++; 3058 mesh_peer_timeout_backoff(ni); 3059 } 3060 break; 3061 case IEEE80211_NODE_MESH_CONFIRMRCV: 3062 args[0] = ni->ni_mlpid; 3063 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3064 ieee80211_send_action(ni, 3065 IEEE80211_ACTION_CAT_SELF_PROT, 3066 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3067 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3068 mesh_peer_timeout_setup(ni); 3069 break; 3070 case IEEE80211_NODE_MESH_HOLDING: 3071 ni->ni_mlhcnt++; 3072 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3073 callout_reset(&ni->ni_mlhtimer, 3074 ieee80211_mesh_backofftimeout, 3075 mesh_peer_backoff_cb, ni); 3076 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3077 break; 3078 } 3079} 3080 3081static int 3082mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3083{ 3084 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3085 3086 if (ie == NULL || ie[1] != ms->ms_idlen) 3087 return 1; 3088 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3089} 3090 3091/* 3092 * Check if we are using the same algorithms for this mesh. 3093 */ 3094static int 3095mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3096{ 3097 const struct ieee80211_meshconf_ie *meshconf = 3098 (const struct ieee80211_meshconf_ie *) ie; 3099 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3100 3101 if (meshconf == NULL) 3102 return 1; 3103 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3104 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3105 "unknown path selection algorithm: 0x%x\n", 3106 meshconf->conf_pselid); 3107 return 1; 3108 } 3109 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3110 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3111 "unknown path metric algorithm: 0x%x\n", 3112 meshconf->conf_pmetid); 3113 return 1; 3114 } 3115 if (meshconf->conf_ccid != 0) { 3116 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3117 "unknown congestion control algorithm: 0x%x\n", 3118 meshconf->conf_ccid); 3119 return 1; 3120 } 3121 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3122 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3123 "unknown sync algorithm: 0x%x\n", 3124 meshconf->conf_syncid); 3125 return 1; 3126 } 3127 if (meshconf->conf_authid != 0) { 3128 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3129 "unknown auth auth algorithm: 0x%x\n", 3130 meshconf->conf_pselid); 3131 return 1; 3132 } 3133 /* Not accepting peers */ 3134 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3135 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3136 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3137 return 1; 3138 } 3139 return 0; 3140} 3141 3142static int 3143mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3144 const uint8_t *ie) 3145{ 3146 const struct ieee80211_meshpeer_ie *meshpeer = 3147 (const struct ieee80211_meshpeer_ie *) ie; 3148 3149 if (meshpeer == NULL || 3150 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3151 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3152 return 1; 3153 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3154 IEEE80211_DPRINTF(vap, 3155 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3156 "Only MPM protocol is supported (proto: 0x%02X)", 3157 meshpeer->peer_proto); 3158 return 1; 3159 } 3160 switch (subtype) { 3161 case IEEE80211_ACTION_MESHPEERING_OPEN: 3162 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3163 return 1; 3164 break; 3165 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3166 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3167 return 1; 3168 break; 3169 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3170 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3171 return 1; 3172 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3173 meshpeer->peer_linkid != 0) 3174 return 1; 3175 if (meshpeer->peer_rcode == 0) 3176 return 1; 3177 break; 3178 } 3179 return 0; 3180} 3181 3182/* 3183 * Add a Mesh ID IE to a frame. 3184 */ 3185uint8_t * 3186ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3187{ 3188 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3189 3190 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3191 3192 *frm++ = IEEE80211_ELEMID_MESHID; 3193 *frm++ = ms->ms_idlen; 3194 memcpy(frm, ms->ms_id, ms->ms_idlen); 3195 return frm + ms->ms_idlen; 3196} 3197 3198/* 3199 * Add a Mesh Configuration IE to a frame. 3200 * For now just use HWMP routing, Airtime link metric, Null Congestion 3201 * Signaling, Null Sync Protocol and Null Authentication. 3202 */ 3203uint8_t * 3204ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3205{ 3206 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3207 uint16_t caps; 3208 3209 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3210 3211 *frm++ = IEEE80211_ELEMID_MESHCONF; 3212 *frm++ = IEEE80211_MESH_CONF_SZ; 3213 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3214 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3215 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3216 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3217 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3218 /* NB: set the number of neighbors before the rest */ 3219 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3220 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3221 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3222 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3223 frm += 1; 3224 caps = 0; 3225 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3226 caps |= IEEE80211_MESHCONF_CAP_AP; 3227 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3228 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3229 *frm++ = caps; 3230 return frm; 3231} 3232 3233/* 3234 * Add a Mesh Peer Management IE to a frame. 3235 */ 3236uint8_t * 3237ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3238 uint16_t peerid, uint16_t reason) 3239{ 3240 3241 KASSERT(localid != 0, ("localid == 0")); 3242 3243 *frm++ = IEEE80211_ELEMID_MESHPEER; 3244 switch (subtype) { 3245 case IEEE80211_ACTION_MESHPEERING_OPEN: 3246 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3247 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3248 ADDSHORT(frm, localid); /* local ID */ 3249 break; 3250 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3251 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3252 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3253 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3254 ADDSHORT(frm, localid); /* local ID */ 3255 ADDSHORT(frm, peerid); /* peer ID */ 3256 break; 3257 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3258 if (peerid) 3259 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3260 else 3261 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3262 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3263 ADDSHORT(frm, localid); /* local ID */ 3264 if (peerid) 3265 ADDSHORT(frm, peerid); /* peer ID */ 3266 ADDSHORT(frm, reason); 3267 break; 3268 } 3269 return frm; 3270} 3271 3272/* 3273 * Compute an Airtime Link Metric for the link with this node. 3274 * 3275 * Based on Draft 3.0 spec (11B.10, p.149). 3276 */ 3277/* 3278 * Max 802.11s overhead. 3279 */ 3280#define IEEE80211_MESH_MAXOVERHEAD \ 3281 (sizeof(struct ieee80211_qosframe_addr4) \ 3282 + sizeof(struct ieee80211_meshcntl_ae10) \ 3283 + sizeof(struct llc) \ 3284 + IEEE80211_ADDR_LEN \ 3285 + IEEE80211_WEP_IVLEN \ 3286 + IEEE80211_WEP_KIDLEN \ 3287 + IEEE80211_WEP_CRCLEN \ 3288 + IEEE80211_WEP_MICLEN \ 3289 + IEEE80211_CRC_LEN) 3290uint32_t 3291mesh_airtime_calc(struct ieee80211_node *ni) 3292{ 3293#define M_BITS 8 3294#define S_FACTOR (2 * M_BITS) 3295 struct ieee80211com *ic = ni->ni_ic; 3296 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3297 const static int nbits = 8192 << M_BITS; 3298 uint32_t overhead, rate, errrate; 3299 uint64_t res; 3300 3301 /* Time to transmit a frame */ 3302 rate = ni->ni_txrate; 3303 overhead = ieee80211_compute_duration(ic->ic_rt, 3304 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3305 /* Error rate in percentage */ 3306 /* XXX assuming small failures are ok */ 3307 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + 3308 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) 3309 / 100; 3310 res = (overhead + (nbits / rate)) * 3311 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3312 3313 return (uint32_t)(res >> S_FACTOR); 3314#undef M_BITS 3315#undef S_FACTOR 3316} 3317 3318/* 3319 * Add a Mesh Link Metric report IE to a frame. 3320 */ 3321uint8_t * 3322ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3323{ 3324 *frm++ = IEEE80211_ELEMID_MESHLINK; 3325 *frm++ = 5; 3326 *frm++ = flags; 3327 ADDWORD(frm, metric); 3328 return frm; 3329} 3330 3331/* 3332 * Add a Mesh Gate Announcement IE to a frame. 3333 */ 3334uint8_t * 3335ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3336{ 3337 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3338 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3339 *frm++ = ie->gann_flags; 3340 *frm++ = ie->gann_hopcount; 3341 *frm++ = ie->gann_ttl; 3342 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3343 frm += 6; 3344 ADDWORD(frm, ie->gann_seq); 3345 ADDSHORT(frm, ie->gann_interval); 3346 return frm; 3347} 3348#undef ADDSHORT 3349#undef ADDWORD 3350 3351/* 3352 * Initialize any mesh-specific node state. 3353 */ 3354void 3355ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3356{ 3357 ni->ni_flags |= IEEE80211_NODE_QOS; 3358 callout_init(&ni->ni_mltimer, 1); 3359 callout_init(&ni->ni_mlhtimer, 1); 3360} 3361 3362/* 3363 * Cleanup any mesh-specific node state. 3364 */ 3365void 3366ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3367{ 3368 struct ieee80211vap *vap = ni->ni_vap; 3369 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3370 3371 callout_drain(&ni->ni_mltimer); 3372 callout_drain(&ni->ni_mlhtimer); 3373 /* NB: short-circuit callbacks after mesh_vdetach */ 3374 if (vap->iv_mesh != NULL) 3375 ms->ms_ppath->mpp_peerdown(ni); 3376} 3377 3378void 3379ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3380{ 3381 ni->ni_meshidlen = ie[1]; 3382 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3383} 3384 3385/* 3386 * Setup mesh-specific node state on neighbor discovery. 3387 */ 3388void 3389ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3390 const struct ieee80211_frame *wh, 3391 const struct ieee80211_scanparams *sp) 3392{ 3393 ieee80211_parse_meshid(ni, sp->meshid); 3394} 3395 3396void 3397ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3398 struct ieee80211_beacon_offsets *bo) 3399{ 3400 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3401 3402 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3403 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3404 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3405 } 3406} 3407 3408static int 3409mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3410{ 3411 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3412 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3413 struct ieee80211_mesh_route *rt; 3414 struct ieee80211req_mesh_route *imr; 3415 size_t len, off; 3416 uint8_t *p; 3417 int error; 3418 3419 if (vap->iv_opmode != IEEE80211_M_MBSS) 3420 return ENOSYS; 3421 3422 error = 0; 3423 switch (ireq->i_type) { 3424 case IEEE80211_IOC_MESH_ID: 3425 ireq->i_len = ms->ms_idlen; 3426 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3427 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3428 break; 3429 case IEEE80211_IOC_MESH_AP: 3430 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3431 break; 3432 case IEEE80211_IOC_MESH_FWRD: 3433 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3434 break; 3435 case IEEE80211_IOC_MESH_GATE: 3436 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3437 break; 3438 case IEEE80211_IOC_MESH_TTL: 3439 ireq->i_val = ms->ms_ttl; 3440 break; 3441 case IEEE80211_IOC_MESH_RTCMD: 3442 switch (ireq->i_val) { 3443 case IEEE80211_MESH_RTCMD_LIST: 3444 len = 0; 3445 MESH_RT_LOCK(ms); 3446 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3447 len += sizeof(*imr); 3448 } 3449 MESH_RT_UNLOCK(ms); 3450 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3451 ireq->i_len = len; 3452 return ENOMEM; 3453 } 3454 ireq->i_len = len; 3455 /* XXX M_WAIT? */ 3456 p = IEEE80211_MALLOC(len, M_TEMP, 3457 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 3458 if (p == NULL) 3459 return ENOMEM; 3460 off = 0; 3461 MESH_RT_LOCK(ms); 3462 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3463 if (off >= len) 3464 break; 3465 imr = (struct ieee80211req_mesh_route *) 3466 (p + off); 3467 IEEE80211_ADDR_COPY(imr->imr_dest, 3468 rt->rt_dest); 3469 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3470 rt->rt_nexthop); 3471 imr->imr_metric = rt->rt_metric; 3472 imr->imr_nhops = rt->rt_nhops; 3473 imr->imr_lifetime = 3474 ieee80211_mesh_rt_update(rt, 0); 3475 imr->imr_lastmseq = rt->rt_lastmseq; 3476 imr->imr_flags = rt->rt_flags; /* last */ 3477 off += sizeof(*imr); 3478 } 3479 MESH_RT_UNLOCK(ms); 3480 error = copyout(p, (uint8_t *)ireq->i_data, 3481 ireq->i_len); 3482 IEEE80211_FREE(p, M_TEMP); 3483 break; 3484 case IEEE80211_MESH_RTCMD_FLUSH: 3485 case IEEE80211_MESH_RTCMD_ADD: 3486 case IEEE80211_MESH_RTCMD_DELETE: 3487 return EINVAL; 3488 default: 3489 return ENOSYS; 3490 } 3491 break; 3492 case IEEE80211_IOC_MESH_PR_METRIC: 3493 len = strlen(ms->ms_pmetric->mpm_descr); 3494 if (ireq->i_len < len) 3495 return EINVAL; 3496 ireq->i_len = len; 3497 error = copyout(ms->ms_pmetric->mpm_descr, 3498 (uint8_t *)ireq->i_data, len); 3499 break; 3500 case IEEE80211_IOC_MESH_PR_PATH: 3501 len = strlen(ms->ms_ppath->mpp_descr); 3502 if (ireq->i_len < len) 3503 return EINVAL; 3504 ireq->i_len = len; 3505 error = copyout(ms->ms_ppath->mpp_descr, 3506 (uint8_t *)ireq->i_data, len); 3507 break; 3508 default: 3509 return ENOSYS; 3510 } 3511 3512 return error; 3513} 3514IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3515 3516static int 3517mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3518{ 3519 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3520 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3521 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3522 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3523 int error; 3524 3525 if (vap->iv_opmode != IEEE80211_M_MBSS) 3526 return ENOSYS; 3527 3528 error = 0; 3529 switch (ireq->i_type) { 3530 case IEEE80211_IOC_MESH_ID: 3531 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3532 return EINVAL; 3533 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3534 if (error != 0) 3535 break; 3536 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3537 ms->ms_idlen = ireq->i_len; 3538 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3539 error = ENETRESET; 3540 break; 3541 case IEEE80211_IOC_MESH_AP: 3542 if (ireq->i_val) 3543 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3544 else 3545 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3546 error = ENETRESET; 3547 break; 3548 case IEEE80211_IOC_MESH_FWRD: 3549 if (ireq->i_val) 3550 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3551 else 3552 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3553 mesh_gatemode_setup(vap); 3554 break; 3555 case IEEE80211_IOC_MESH_GATE: 3556 if (ireq->i_val) 3557 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3558 else 3559 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3560 break; 3561 case IEEE80211_IOC_MESH_TTL: 3562 ms->ms_ttl = (uint8_t) ireq->i_val; 3563 break; 3564 case IEEE80211_IOC_MESH_RTCMD: 3565 switch (ireq->i_val) { 3566 case IEEE80211_MESH_RTCMD_LIST: 3567 return EINVAL; 3568 case IEEE80211_MESH_RTCMD_FLUSH: 3569 ieee80211_mesh_rt_flush(vap); 3570 break; 3571 case IEEE80211_MESH_RTCMD_ADD: 3572 error = copyin(ireq->i_data, tmpaddr, 3573 IEEE80211_ADDR_LEN); 3574 if (error != 0) 3575 break; 3576 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, tmpaddr) || 3577 IEEE80211_ADDR_EQ(broadcastaddr, tmpaddr)) 3578 return EINVAL; 3579 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3580 break; 3581 case IEEE80211_MESH_RTCMD_DELETE: 3582 error = copyin(ireq->i_data, tmpaddr, 3583 IEEE80211_ADDR_LEN); 3584 if (error != 0) 3585 break; 3586 ieee80211_mesh_rt_del(vap, tmpaddr); 3587 break; 3588 default: 3589 return ENOSYS; 3590 } 3591 break; 3592 case IEEE80211_IOC_MESH_PR_METRIC: 3593 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3594 if (error == 0) { 3595 error = mesh_select_proto_metric(vap, tmpproto); 3596 if (error == 0) 3597 error = ENETRESET; 3598 } 3599 break; 3600 case IEEE80211_IOC_MESH_PR_PATH: 3601 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3602 if (error == 0) { 3603 error = mesh_select_proto_path(vap, tmpproto); 3604 if (error == 0) 3605 error = ENETRESET; 3606 } 3607 break; 3608 default: 3609 return ENOSYS; 3610 } 3611 return error; 3612} 3613IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3614