ieee80211_mesh.c revision 252847
1/*- 2 * Copyright (c) 2009 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Rui Paulo under sponsorship from the 6 * FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29#include <sys/cdefs.h> 30#ifdef __FreeBSD__ 31__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_mesh.c 252847 2013-07-05 22:10:50Z adrian $"); 32#endif 33 34/* 35 * IEEE 802.11s Mesh Point (MBSS) support. 36 * 37 * Based on March 2009, D3.0 802.11s draft spec. 38 */ 39#include "opt_inet.h" 40#include "opt_wlan.h" 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/mbuf.h> 45#include <sys/malloc.h> 46#include <sys/kernel.h> 47 48#include <sys/socket.h> 49#include <sys/sockio.h> 50#include <sys/endian.h> 51#include <sys/errno.h> 52#include <sys/proc.h> 53#include <sys/sysctl.h> 54 55#include <net/bpf.h> 56#include <net/if.h> 57#include <net/if_media.h> 58#include <net/if_llc.h> 59#include <net/ethernet.h> 60 61#include <net80211/ieee80211_var.h> 62#include <net80211/ieee80211_action.h> 63#ifdef IEEE80211_SUPPORT_SUPERG 64#include <net80211/ieee80211_superg.h> 65#endif 66#include <net80211/ieee80211_input.h> 67#include <net80211/ieee80211_mesh.h> 68 69static void mesh_rt_flush_invalid(struct ieee80211vap *); 70static int mesh_select_proto_path(struct ieee80211vap *, const char *); 71static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 72static void mesh_vattach(struct ieee80211vap *); 73static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 74static void mesh_rt_cleanup_cb(void *); 75static void mesh_gatemode_setup(struct ieee80211vap *); 76static void mesh_gatemode_cb(void *); 77static void mesh_linkchange(struct ieee80211_node *, 78 enum ieee80211_mesh_mlstate); 79static void mesh_checkid(void *, struct ieee80211_node *); 80static uint32_t mesh_generateid(struct ieee80211vap *); 81static int mesh_checkpseq(struct ieee80211vap *, 82 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 83static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, 84 struct ieee80211_mesh_route *); 85static void mesh_forward(struct ieee80211vap *, struct mbuf *, 86 const struct ieee80211_meshcntl *); 87static int mesh_input(struct ieee80211_node *, struct mbuf *, int, int); 88static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 89 int, int); 90static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 91static void mesh_peer_timeout_setup(struct ieee80211_node *); 92static void mesh_peer_timeout_backoff(struct ieee80211_node *); 93static void mesh_peer_timeout_cb(void *); 94static __inline void 95 mesh_peer_timeout_stop(struct ieee80211_node *); 96static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 97static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 98static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 99 const uint8_t *); 100uint32_t mesh_airtime_calc(struct ieee80211_node *); 101 102/* 103 * Timeout values come from the specification and are in milliseconds. 104 */ 105static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 106 "IEEE 802.11s parameters"); 107static int ieee80211_mesh_gateint = -1; 108SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW, 109 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 110 "mesh gate interval (ms)"); 111static int ieee80211_mesh_retrytimeout = -1; 112SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, 113 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 114 "Retry timeout (msec)"); 115static int ieee80211_mesh_holdingtimeout = -1; 116 117SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, 118 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 119 "Holding state timeout (msec)"); 120static int ieee80211_mesh_confirmtimeout = -1; 121SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, 122 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 123 "Confirm state timeout (msec)"); 124static int ieee80211_mesh_backofftimeout = -1; 125SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW, 126 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 127 "Backoff timeout (msec). This is to throutles peering forever when " 128 "not receving answer or is rejected by a neighbor"); 129static int ieee80211_mesh_maxretries = 2; 130SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW, 131 &ieee80211_mesh_maxretries, 0, 132 "Maximum retries during peer link establishment"); 133static int ieee80211_mesh_maxholding = 2; 134SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLTYPE_INT | CTLFLAG_RW, 135 &ieee80211_mesh_maxholding, 0, 136 "Maximum times we are allowed to transition to HOLDING state before " 137 "backinoff during peer link establishment"); 138 139static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 140 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 141 142static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 143static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 144static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 145static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 146static ieee80211_recv_action_func mesh_recv_action_meshgate; 147 148static ieee80211_send_action_func mesh_send_action_meshpeering_open; 149static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 150static ieee80211_send_action_func mesh_send_action_meshpeering_close; 151static ieee80211_send_action_func mesh_send_action_meshlmetric; 152static ieee80211_send_action_func mesh_send_action_meshgate; 153 154static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 155 .mpm_descr = "AIRTIME", 156 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 157 .mpm_metric = mesh_airtime_calc, 158}; 159 160static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 161static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 162 163#define RT_ENTRY_LOCK(rt) mtx_lock(&(rt)->rt_lock) 164#define RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED) 165#define RT_ENTRY_UNLOCK(rt) mtx_unlock(&(rt)->rt_lock) 166 167#define MESH_RT_LOCK(ms) mtx_lock(&(ms)->ms_rt_lock) 168#define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED) 169#define MESH_RT_UNLOCK(ms) mtx_unlock(&(ms)->ms_rt_lock) 170 171MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 172MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 173MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 174 175/* The longer one of the lifetime should be stored as new lifetime */ 176#define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 177 178MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 179MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 180 181/* 182 * Helper functions to manipulate the Mesh routing table. 183 */ 184 185static struct ieee80211_mesh_route * 186mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 187 const uint8_t dest[IEEE80211_ADDR_LEN]) 188{ 189 struct ieee80211_mesh_route *rt; 190 191 MESH_RT_LOCK_ASSERT(ms); 192 193 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 194 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 195 return rt; 196 } 197 return NULL; 198} 199 200static struct ieee80211_mesh_route * 201mesh_rt_add_locked(struct ieee80211vap *vap, 202 const uint8_t dest[IEEE80211_ADDR_LEN]) 203{ 204 struct ieee80211_mesh_state *ms = vap->iv_mesh; 205 struct ieee80211_mesh_route *rt; 206 207 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 208 ("%s: adding broadcast to the routing table", __func__)); 209 210 MESH_RT_LOCK_ASSERT(ms); 211 212 rt = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) + 213 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | M_ZERO); 214 if (rt != NULL) { 215 rt->rt_vap = vap; 216 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 217 rt->rt_priv = (void *)ALIGN(&rt[1]); 218 mtx_init(&rt->rt_lock, "MBSS_RT", "802.11s route entry", MTX_DEF); 219 callout_init(&rt->rt_discovery, CALLOUT_MPSAFE); 220 rt->rt_updtime = ticks; /* create time */ 221 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 222 } 223 return rt; 224} 225 226struct ieee80211_mesh_route * 227ieee80211_mesh_rt_find(struct ieee80211vap *vap, 228 const uint8_t dest[IEEE80211_ADDR_LEN]) 229{ 230 struct ieee80211_mesh_state *ms = vap->iv_mesh; 231 struct ieee80211_mesh_route *rt; 232 233 MESH_RT_LOCK(ms); 234 rt = mesh_rt_find_locked(ms, dest); 235 MESH_RT_UNLOCK(ms); 236 return rt; 237} 238 239struct ieee80211_mesh_route * 240ieee80211_mesh_rt_add(struct ieee80211vap *vap, 241 const uint8_t dest[IEEE80211_ADDR_LEN]) 242{ 243 struct ieee80211_mesh_state *ms = vap->iv_mesh; 244 struct ieee80211_mesh_route *rt; 245 246 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 247 ("%s: duplicate entry in the routing table", __func__)); 248 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 249 ("%s: adding self to the routing table", __func__)); 250 251 MESH_RT_LOCK(ms); 252 rt = mesh_rt_add_locked(vap, dest); 253 MESH_RT_UNLOCK(ms); 254 return rt; 255} 256 257/* 258 * Update the route lifetime and returns the updated lifetime. 259 * If new_lifetime is zero and route is timedout it will be invalidated. 260 * new_lifetime is in msec 261 */ 262int 263ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 264{ 265 int timesince, now; 266 uint32_t lifetime = 0; 267 268 KASSERT(rt != NULL, ("route is NULL")); 269 270 now = ticks; 271 RT_ENTRY_LOCK(rt); 272 273 /* dont clobber a proxy entry gated by us */ 274 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 275 RT_ENTRY_UNLOCK(rt); 276 return rt->rt_lifetime; 277 } 278 279 timesince = ticks_to_msecs(now - rt->rt_updtime); 280 rt->rt_updtime = now; 281 if (timesince >= rt->rt_lifetime) { 282 if (new_lifetime != 0) { 283 rt->rt_lifetime = new_lifetime; 284 } 285 else { 286 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 287 rt->rt_lifetime = 0; 288 } 289 } else { 290 /* update what is left of lifetime */ 291 rt->rt_lifetime = rt->rt_lifetime - timesince; 292 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 293 new_lifetime, rt->rt_lifetime); 294 } 295 lifetime = rt->rt_lifetime; 296 RT_ENTRY_UNLOCK(rt); 297 298 return lifetime; 299} 300 301/* 302 * Add a proxy route (as needed) for the specified destination. 303 */ 304void 305ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 306 const uint8_t dest[IEEE80211_ADDR_LEN]) 307{ 308 struct ieee80211_mesh_state *ms = vap->iv_mesh; 309 struct ieee80211_mesh_route *rt; 310 311 MESH_RT_LOCK(ms); 312 rt = mesh_rt_find_locked(ms, dest); 313 if (rt == NULL) { 314 rt = mesh_rt_add_locked(vap, dest); 315 if (rt == NULL) { 316 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 317 "%s", "unable to add proxy entry"); 318 vap->iv_stats.is_mesh_rtaddfailed++; 319 } else { 320 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 321 "%s", "add proxy entry"); 322 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 323 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 324 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 325 | IEEE80211_MESHRT_FLAGS_PROXY; 326 } 327 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 328 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 329 ("no proxy flag for poxy entry")); 330 struct ieee80211com *ic = vap->iv_ic; 331 /* 332 * Fix existing entry created by received frames from 333 * stations that have some memory of dest. We also 334 * flush any frames held on the staging queue; delivering 335 * them is too much trouble right now. 336 */ 337 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 338 "%s", "fix proxy entry"); 339 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 340 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 341 | IEEE80211_MESHRT_FLAGS_PROXY; 342 /* XXX belongs in hwmp */ 343 ieee80211_ageq_drain_node(&ic->ic_stageq, 344 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 345 /* XXX stat? */ 346 } 347 MESH_RT_UNLOCK(ms); 348} 349 350static __inline void 351mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 352{ 353 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 354 /* 355 * Grab the lock before destroying it, to be sure no one else 356 * is holding the route. 357 */ 358 RT_ENTRY_LOCK(rt); 359 callout_drain(&rt->rt_discovery); 360 mtx_destroy(&rt->rt_lock); 361 free(rt, M_80211_MESH_RT); 362} 363 364void 365ieee80211_mesh_rt_del(struct ieee80211vap *vap, 366 const uint8_t dest[IEEE80211_ADDR_LEN]) 367{ 368 struct ieee80211_mesh_state *ms = vap->iv_mesh; 369 struct ieee80211_mesh_route *rt, *next; 370 371 MESH_RT_LOCK(ms); 372 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 373 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 374 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 375 ms->ms_ppath->mpp_senderror(vap, dest, rt, 376 IEEE80211_REASON_MESH_PERR_NO_PROXY); 377 } else { 378 ms->ms_ppath->mpp_senderror(vap, dest, rt, 379 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 380 } 381 mesh_rt_del(ms, rt); 382 MESH_RT_UNLOCK(ms); 383 return; 384 } 385 } 386 MESH_RT_UNLOCK(ms); 387} 388 389void 390ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 391{ 392 struct ieee80211_mesh_state *ms = vap->iv_mesh; 393 struct ieee80211_mesh_route *rt, *next; 394 395 if (ms == NULL) 396 return; 397 MESH_RT_LOCK(ms); 398 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 399 mesh_rt_del(ms, rt); 400 MESH_RT_UNLOCK(ms); 401} 402 403void 404ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 405 const uint8_t peer[IEEE80211_ADDR_LEN]) 406{ 407 struct ieee80211_mesh_state *ms = vap->iv_mesh; 408 struct ieee80211_mesh_route *rt, *next; 409 410 MESH_RT_LOCK(ms); 411 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 412 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 413 mesh_rt_del(ms, rt); 414 } 415 MESH_RT_UNLOCK(ms); 416} 417 418/* 419 * Flush expired routing entries, i.e. those in invalid state for 420 * some time. 421 */ 422static void 423mesh_rt_flush_invalid(struct ieee80211vap *vap) 424{ 425 struct ieee80211_mesh_state *ms = vap->iv_mesh; 426 struct ieee80211_mesh_route *rt, *next; 427 428 if (ms == NULL) 429 return; 430 MESH_RT_LOCK(ms); 431 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 432 /* Discover paths will be deleted by their own callout */ 433 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 434 continue; 435 ieee80211_mesh_rt_update(rt, 0); 436 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 437 mesh_rt_del(ms, rt); 438 } 439 MESH_RT_UNLOCK(ms); 440} 441 442#define N(a) (sizeof(a) / sizeof(a[0])) 443int 444ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 445{ 446 int i, firstempty = -1; 447 448 for (i = 0; i < N(mesh_proto_paths); i++) { 449 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 450 IEEE80211_MESH_PROTO_DSZ) == 0) 451 return EEXIST; 452 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 453 firstempty = i; 454 } 455 if (firstempty < 0) 456 return ENOSPC; 457 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 458 mesh_proto_paths[firstempty].mpp_active = 1; 459 return 0; 460} 461 462int 463ieee80211_mesh_register_proto_metric(const struct 464 ieee80211_mesh_proto_metric *mpm) 465{ 466 int i, firstempty = -1; 467 468 for (i = 0; i < N(mesh_proto_metrics); i++) { 469 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 470 IEEE80211_MESH_PROTO_DSZ) == 0) 471 return EEXIST; 472 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 473 firstempty = i; 474 } 475 if (firstempty < 0) 476 return ENOSPC; 477 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 478 mesh_proto_metrics[firstempty].mpm_active = 1; 479 return 0; 480} 481 482static int 483mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 484{ 485 struct ieee80211_mesh_state *ms = vap->iv_mesh; 486 int i; 487 488 for (i = 0; i < N(mesh_proto_paths); i++) { 489 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 490 ms->ms_ppath = &mesh_proto_paths[i]; 491 return 0; 492 } 493 } 494 return ENOENT; 495} 496 497static int 498mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 499{ 500 struct ieee80211_mesh_state *ms = vap->iv_mesh; 501 int i; 502 503 for (i = 0; i < N(mesh_proto_metrics); i++) { 504 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 505 ms->ms_pmetric = &mesh_proto_metrics[i]; 506 return 0; 507 } 508 } 509 return ENOENT; 510} 511#undef N 512 513static void 514mesh_gatemode_setup(struct ieee80211vap *vap) 515{ 516 struct ieee80211_mesh_state *ms = vap->iv_mesh; 517 518 /* 519 * NB: When a mesh gate is running as a ROOT it shall 520 * not send out periodic GANNs but instead mark the 521 * mesh gate flag for the corresponding proactive PREQ 522 * and RANN frames. 523 */ 524 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 525 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 526 callout_drain(&ms->ms_gatetimer); 527 return ; 528 } 529 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 530 mesh_gatemode_cb, vap); 531} 532 533static void 534mesh_gatemode_cb(void *arg) 535{ 536 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 537 struct ieee80211_mesh_state *ms = vap->iv_mesh; 538 struct ieee80211_meshgann_ie gann; 539 540 gann.gann_flags = 0; /* Reserved */ 541 gann.gann_hopcount = 0; 542 gann.gann_ttl = ms->ms_ttl; 543 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 544 gann.gann_seq = ms->ms_gateseq++; 545 gann.gann_interval = ieee80211_mesh_gateint; 546 547 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 548 "send broadcast GANN (seq %u)", gann.gann_seq); 549 550 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 551 IEEE80211_ACTION_MESH_GANN, &gann); 552 mesh_gatemode_setup(vap); 553} 554 555static void 556ieee80211_mesh_init(void) 557{ 558 559 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 560 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 561 562 /* 563 * Setup mesh parameters that depends on the clock frequency. 564 */ 565 ieee80211_mesh_gateint = msecs_to_ticks(10000); 566 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 567 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 568 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 569 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 570 571 /* 572 * Register action frame handlers. 573 */ 574 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 575 IEEE80211_ACTION_MESHPEERING_OPEN, 576 mesh_recv_action_meshpeering_open); 577 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 578 IEEE80211_ACTION_MESHPEERING_CONFIRM, 579 mesh_recv_action_meshpeering_confirm); 580 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 581 IEEE80211_ACTION_MESHPEERING_CLOSE, 582 mesh_recv_action_meshpeering_close); 583 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 584 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 585 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 586 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 587 588 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 589 IEEE80211_ACTION_MESHPEERING_OPEN, 590 mesh_send_action_meshpeering_open); 591 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 592 IEEE80211_ACTION_MESHPEERING_CONFIRM, 593 mesh_send_action_meshpeering_confirm); 594 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 595 IEEE80211_ACTION_MESHPEERING_CLOSE, 596 mesh_send_action_meshpeering_close); 597 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 598 IEEE80211_ACTION_MESH_LMETRIC, 599 mesh_send_action_meshlmetric); 600 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 601 IEEE80211_ACTION_MESH_GANN, 602 mesh_send_action_meshgate); 603 604 /* 605 * Register Airtime Link Metric. 606 */ 607 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 608 609} 610SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 611 612void 613ieee80211_mesh_attach(struct ieee80211com *ic) 614{ 615 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 616} 617 618void 619ieee80211_mesh_detach(struct ieee80211com *ic) 620{ 621} 622 623static void 624mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 625{ 626 struct ieee80211com *ic = ni->ni_ic; 627 uint16_t args[3]; 628 629 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 630 args[0] = ni->ni_mlpid; 631 args[1] = ni->ni_mllid; 632 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 633 ieee80211_send_action(ni, 634 IEEE80211_ACTION_CAT_SELF_PROT, 635 IEEE80211_ACTION_MESHPEERING_CLOSE, 636 args); 637 } 638 callout_drain(&ni->ni_mltimer); 639 /* XXX belongs in hwmp */ 640 ieee80211_ageq_drain_node(&ic->ic_stageq, 641 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 642} 643 644static void 645mesh_vdetach(struct ieee80211vap *vap) 646{ 647 struct ieee80211_mesh_state *ms = vap->iv_mesh; 648 649 callout_drain(&ms->ms_cleantimer); 650 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 651 NULL); 652 ieee80211_mesh_rt_flush(vap); 653 mtx_destroy(&ms->ms_rt_lock); 654 ms->ms_ppath->mpp_vdetach(vap); 655 free(vap->iv_mesh, M_80211_VAP); 656 vap->iv_mesh = NULL; 657} 658 659static void 660mesh_vattach(struct ieee80211vap *vap) 661{ 662 struct ieee80211_mesh_state *ms; 663 vap->iv_newstate = mesh_newstate; 664 vap->iv_input = mesh_input; 665 vap->iv_opdetach = mesh_vdetach; 666 vap->iv_recv_mgmt = mesh_recv_mgmt; 667 vap->iv_recv_ctl = mesh_recv_ctl; 668 ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 669 M_NOWAIT | M_ZERO); 670 if (ms == NULL) { 671 printf("%s: couldn't alloc MBSS state\n", __func__); 672 return; 673 } 674 vap->iv_mesh = ms; 675 ms->ms_seq = 0; 676 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 677 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 678 TAILQ_INIT(&ms->ms_known_gates); 679 TAILQ_INIT(&ms->ms_routes); 680 mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF); 681 callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE); 682 callout_init(&ms->ms_gatetimer, CALLOUT_MPSAFE); 683 ms->ms_gateseq = 0; 684 mesh_select_proto_metric(vap, "AIRTIME"); 685 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 686 mesh_select_proto_path(vap, "HWMP"); 687 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 688 ms->ms_ppath->mpp_vattach(vap); 689} 690 691/* 692 * IEEE80211_M_MBSS vap state machine handler. 693 */ 694static int 695mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 696{ 697 struct ieee80211_mesh_state *ms = vap->iv_mesh; 698 struct ieee80211com *ic = vap->iv_ic; 699 struct ieee80211_node *ni; 700 enum ieee80211_state ostate; 701 702 IEEE80211_LOCK_ASSERT(ic); 703 704 ostate = vap->iv_state; 705 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 706 __func__, ieee80211_state_name[ostate], 707 ieee80211_state_name[nstate], arg); 708 vap->iv_state = nstate; /* state transition */ 709 if (ostate != IEEE80211_S_SCAN) 710 ieee80211_cancel_scan(vap); /* background scan */ 711 ni = vap->iv_bss; /* NB: no reference held */ 712 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 713 callout_drain(&ms->ms_cleantimer); 714 callout_drain(&ms->ms_gatetimer); 715 } 716 switch (nstate) { 717 case IEEE80211_S_INIT: 718 switch (ostate) { 719 case IEEE80211_S_SCAN: 720 ieee80211_cancel_scan(vap); 721 break; 722 case IEEE80211_S_CAC: 723 ieee80211_dfs_cac_stop(vap); 724 break; 725 case IEEE80211_S_RUN: 726 ieee80211_iterate_nodes(&ic->ic_sta, 727 mesh_vdetach_peers, NULL); 728 break; 729 default: 730 break; 731 } 732 if (ostate != IEEE80211_S_INIT) { 733 /* NB: optimize INIT -> INIT case */ 734 ieee80211_reset_bss(vap); 735 ieee80211_mesh_rt_flush(vap); 736 } 737 break; 738 case IEEE80211_S_SCAN: 739 switch (ostate) { 740 case IEEE80211_S_INIT: 741 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 742 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 743 ms->ms_idlen != 0) { 744 /* 745 * Already have a channel and a mesh ID; bypass 746 * the scan and startup immediately. 747 */ 748 ieee80211_create_ibss(vap, vap->iv_des_chan); 749 break; 750 } 751 /* 752 * Initiate a scan. We can come here as a result 753 * of an IEEE80211_IOC_SCAN_REQ too in which case 754 * the vap will be marked with IEEE80211_FEXT_SCANREQ 755 * and the scan request parameters will be present 756 * in iv_scanreq. Otherwise we do the default. 757 */ 758 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 759 ieee80211_check_scan(vap, 760 vap->iv_scanreq_flags, 761 vap->iv_scanreq_duration, 762 vap->iv_scanreq_mindwell, 763 vap->iv_scanreq_maxdwell, 764 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 765 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 766 } else 767 ieee80211_check_scan_current(vap); 768 break; 769 default: 770 break; 771 } 772 break; 773 case IEEE80211_S_CAC: 774 /* 775 * Start CAC on a DFS channel. We come here when starting 776 * a bss on a DFS channel (see ieee80211_create_ibss). 777 */ 778 ieee80211_dfs_cac_start(vap); 779 break; 780 case IEEE80211_S_RUN: 781 switch (ostate) { 782 case IEEE80211_S_INIT: 783 /* 784 * Already have a channel; bypass the 785 * scan and startup immediately. 786 * Note that ieee80211_create_ibss will call 787 * back to do a RUN->RUN state change. 788 */ 789 ieee80211_create_ibss(vap, 790 ieee80211_ht_adjust_channel(ic, 791 ic->ic_curchan, vap->iv_flags_ht)); 792 /* NB: iv_bss is changed on return */ 793 break; 794 case IEEE80211_S_CAC: 795 /* 796 * NB: This is the normal state change when CAC 797 * expires and no radar was detected; no need to 798 * clear the CAC timer as it's already expired. 799 */ 800 /* fall thru... */ 801 case IEEE80211_S_CSA: 802#if 0 803 /* 804 * Shorten inactivity timer of associated stations 805 * to weed out sta's that don't follow a CSA. 806 */ 807 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 808#endif 809 /* 810 * Update bss node channel to reflect where 811 * we landed after CSA. 812 */ 813 ieee80211_node_set_chan(vap->iv_bss, 814 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 815 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 816 /* XXX bypass debug msgs */ 817 break; 818 case IEEE80211_S_SCAN: 819 case IEEE80211_S_RUN: 820#ifdef IEEE80211_DEBUG 821 if (ieee80211_msg_debug(vap)) { 822 struct ieee80211_node *ni = vap->iv_bss; 823 ieee80211_note(vap, 824 "synchronized with %s meshid ", 825 ether_sprintf(ni->ni_meshid)); 826 ieee80211_print_essid(ni->ni_meshid, 827 ni->ni_meshidlen); 828 /* XXX MCS/HT */ 829 printf(" channel %d\n", 830 ieee80211_chan2ieee(ic, ic->ic_curchan)); 831 } 832#endif 833 break; 834 default: 835 break; 836 } 837 ieee80211_node_authorize(vap->iv_bss); 838 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 839 mesh_rt_cleanup_cb, vap); 840 mesh_gatemode_setup(vap); 841 break; 842 default: 843 break; 844 } 845 /* NB: ostate not nstate */ 846 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 847 return 0; 848} 849 850static void 851mesh_rt_cleanup_cb(void *arg) 852{ 853 struct ieee80211vap *vap = arg; 854 struct ieee80211_mesh_state *ms = vap->iv_mesh; 855 856 mesh_rt_flush_invalid(vap); 857 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 858 mesh_rt_cleanup_cb, vap); 859} 860 861/* 862 * Mark a mesh STA as gate and return a pointer to it. 863 * If this is first time, we create a new gate route. 864 * Always update the path route to this mesh gate. 865 */ 866struct ieee80211_mesh_gate_route * 867ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 868 struct ieee80211_mesh_route *rt) 869{ 870 struct ieee80211_mesh_state *ms = vap->iv_mesh; 871 struct ieee80211_mesh_gate_route *gr = NULL, *next; 872 int found = 0; 873 874 MESH_RT_LOCK(ms); 875 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 876 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 877 found = 1; 878 break; 879 } 880 } 881 882 if (!found) { 883 /* New mesh gate add it to known table. */ 884 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 885 "%s", "stored new gate information from pro-PREQ."); 886 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 887 M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO); 888 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 889 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 890 } 891 gr->gr_route = rt; 892 /* TODO: link from path route to gate route */ 893 MESH_RT_UNLOCK(ms); 894 895 return gr; 896} 897 898 899/* 900 * Helper function to note the Mesh Peer Link FSM change. 901 */ 902static void 903mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 904{ 905 struct ieee80211vap *vap = ni->ni_vap; 906 struct ieee80211_mesh_state *ms = vap->iv_mesh; 907#ifdef IEEE80211_DEBUG 908 static const char *meshlinkstates[] = { 909 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 910 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 911 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 912 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 913 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 914 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 915 }; 916#endif 917 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 918 ni, "peer link: %s -> %s", 919 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 920 921 /* track neighbor count */ 922 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 923 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 924 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 925 ms->ms_neighbors++; 926 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 927 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 928 state != IEEE80211_NODE_MESH_ESTABLISHED) { 929 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 930 ms->ms_neighbors--; 931 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 932 } 933 ni->ni_mlstate = state; 934 switch (state) { 935 case IEEE80211_NODE_MESH_HOLDING: 936 ms->ms_ppath->mpp_peerdown(ni); 937 break; 938 case IEEE80211_NODE_MESH_ESTABLISHED: 939 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 940 break; 941 default: 942 break; 943 } 944} 945 946/* 947 * Helper function to generate a unique local ID required for mesh 948 * peer establishment. 949 */ 950static void 951mesh_checkid(void *arg, struct ieee80211_node *ni) 952{ 953 uint16_t *r = arg; 954 955 if (*r == ni->ni_mllid) 956 *(uint16_t *)arg = 0; 957} 958 959static uint32_t 960mesh_generateid(struct ieee80211vap *vap) 961{ 962 int maxiter = 4; 963 uint16_t r; 964 965 do { 966 get_random_bytes(&r, 2); 967 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 968 maxiter--; 969 } while (r == 0 && maxiter > 0); 970 return r; 971} 972 973/* 974 * Verifies if we already received this packet by checking its 975 * sequence number. 976 * Returns 0 if the frame is to be accepted, 1 otherwise. 977 */ 978static int 979mesh_checkpseq(struct ieee80211vap *vap, 980 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 981{ 982 struct ieee80211_mesh_route *rt; 983 984 rt = ieee80211_mesh_rt_find(vap, source); 985 if (rt == NULL) { 986 rt = ieee80211_mesh_rt_add(vap, source); 987 if (rt == NULL) { 988 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 989 "%s", "add mcast route failed"); 990 vap->iv_stats.is_mesh_rtaddfailed++; 991 return 1; 992 } 993 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 994 "add mcast route, mesh seqno %d", seq); 995 rt->rt_lastmseq = seq; 996 return 0; 997 } 998 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 999 return 1; 1000 } else { 1001 rt->rt_lastmseq = seq; 1002 return 0; 1003 } 1004} 1005 1006/* 1007 * Iterate the routing table and locate the next hop. 1008 */ 1009struct ieee80211_node * 1010ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1011 const uint8_t dest[IEEE80211_ADDR_LEN]) 1012{ 1013 struct ieee80211_mesh_route *rt; 1014 1015 rt = ieee80211_mesh_rt_find(vap, dest); 1016 if (rt == NULL) 1017 return NULL; 1018 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1019 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1020 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1021 /* XXX stat */ 1022 return NULL; 1023 } 1024 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1025 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1026 if (rt == NULL) return NULL; 1027 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1028 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1029 "%s: meshgate !valid, flags 0x%x", __func__, 1030 rt->rt_flags); 1031 /* XXX stat */ 1032 return NULL; 1033 } 1034 } 1035 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1036} 1037 1038static void 1039mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1040 struct ieee80211_mesh_route *rt_gate) 1041{ 1042 struct ifnet *ifp = vap->iv_ifp; 1043 struct ieee80211com *ic = vap->iv_ic; 1044 struct ieee80211_node *ni; 1045 struct ether_header *eh; 1046 int error; 1047 1048 IEEE80211_TX_UNLOCK_ASSERT(ic); 1049 1050 eh = mtod(m, struct ether_header *); 1051 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1052 if (ni == NULL) { 1053 ifp->if_oerrors++; 1054 m_freem(m); 1055 return; 1056 } 1057 1058 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 1059 (m->m_flags & M_PWR_SAV) == 0) { 1060 /* 1061 * Station in power save mode; pass the frame 1062 * to the 802.11 layer and continue. We'll get 1063 * the frame back when the time is right. 1064 * XXX lose WDS vap linkage? 1065 */ 1066 (void) ieee80211_pwrsave(ni, m); 1067 ieee80211_free_node(ni); 1068 return; 1069 } 1070 1071 /* calculate priority so drivers can find the tx queue */ 1072 if (ieee80211_classify(ni, m)) { 1073 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT, 1074 eh->ether_dhost, NULL, 1075 "%s", "classification failure"); 1076 vap->iv_stats.is_tx_classify++; 1077 ifp->if_oerrors++; 1078 m_freem(m); 1079 ieee80211_free_node(ni); 1080 return; 1081 } 1082 /* 1083 * Stash the node pointer. Note that we do this after 1084 * any call to ieee80211_dwds_mcast because that code 1085 * uses any existing value for rcvif to identify the 1086 * interface it (might have been) received on. 1087 */ 1088 m->m_pkthdr.rcvif = (void *)ni; 1089 1090 BPF_MTAP(ifp, m); /* 802.3 tx */ 1091 1092 /* 1093 * Check if A-MPDU tx aggregation is setup or if we 1094 * should try to enable it. The sta must be associated 1095 * with HT and A-MPDU enabled for use. When the policy 1096 * routine decides we should enable A-MPDU we issue an 1097 * ADDBA request and wait for a reply. The frame being 1098 * encapsulated will go out w/o using A-MPDU, or possibly 1099 * it might be collected by the driver and held/retransmit. 1100 * The default ic_ampdu_enable routine handles staggering 1101 * ADDBA requests in case the receiver NAK's us or we are 1102 * otherwise unable to establish a BA stream. 1103 */ 1104 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) && 1105 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX) && 1106 (m->m_flags & M_EAPOL) == 0) { 1107 int tid = WME_AC_TO_TID(M_WME_GETAC(m)); 1108 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid]; 1109 1110 ieee80211_txampdu_count_packet(tap); 1111 if (IEEE80211_AMPDU_RUNNING(tap)) { 1112 /* 1113 * Operational, mark frame for aggregation. 1114 * 1115 * XXX do tx aggregation here 1116 */ 1117 m->m_flags |= M_AMPDU_MPDU; 1118 } else if (!IEEE80211_AMPDU_REQUESTED(tap) && 1119 ic->ic_ampdu_enable(ni, tap)) { 1120 /* 1121 * Not negotiated yet, request service. 1122 */ 1123 ieee80211_ampdu_request(ni, tap); 1124 /* XXX hold frame for reply? */ 1125 } 1126 } 1127#ifdef IEEE80211_SUPPORT_SUPERG 1128 else if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF)) { 1129 m = ieee80211_ff_check(ni, m); 1130 if (m == NULL) { 1131 /* NB: any ni ref held on stageq */ 1132 return; 1133 } 1134 } 1135#endif /* IEEE80211_SUPPORT_SUPERG */ 1136 1137 IEEE80211_TX_LOCK(ic); 1138 if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) { 1139 /* 1140 * Encapsulate the packet in prep for transmission. 1141 */ 1142 m = ieee80211_encap(vap, ni, m); 1143 if (m == NULL) { 1144 /* NB: stat+msg handled in ieee80211_encap */ 1145 IEEE80211_TX_UNLOCK(ic); 1146 ieee80211_free_node(ni); 1147 return; 1148 } 1149 } 1150 error = ieee80211_parent_transmit(ic, m); 1151 IEEE80211_TX_UNLOCK(ic); 1152 if (error != 0) { 1153 ieee80211_free_node(ni); 1154 } else { 1155 ifp->if_opackets++; 1156 } 1157 ic->ic_lastdata = ticks; 1158} 1159 1160/* 1161 * Forward the queued frames to known valid mesh gates. 1162 * Assume destination to be outside the MBSS (i.e. proxy entry), 1163 * If no valid mesh gates are known silently discard queued frames. 1164 * After transmitting frames to all known valid mesh gates, this route 1165 * will be marked invalid, and a new path discovery will happen in the hopes 1166 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1167 */ 1168void 1169ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1170 struct ieee80211_mesh_route *rt_dest) 1171{ 1172 struct ieee80211com *ic = vap->iv_ic; 1173 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1174 struct ieee80211_mesh_route *rt_gate; 1175 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1176 struct mbuf *m, *mcopy, *next; 1177 1178 IEEE80211_TX_UNLOCK_ASSERT(ic); 1179 1180 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1181 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1182 1183 /* XXX: send to more than one valid mash gate */ 1184 MESH_RT_LOCK(ms); 1185 1186 m = ieee80211_ageq_remove(&ic->ic_stageq, 1187 (struct ieee80211_node *)(uintptr_t) 1188 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1189 1190 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1191 rt_gate = gr->gr_route; 1192 if (rt_gate == NULL) { 1193 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1194 rt_dest->rt_dest, 1195 "mesh gate with no path %6D", 1196 gr->gr_addr, ":"); 1197 continue; 1198 } 1199 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1200 continue; 1201 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1202 ("route not marked as a mesh gate")); 1203 KASSERT((rt_gate->rt_flags & 1204 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1205 ("found mesh gate that is also marked porxy")); 1206 /* 1207 * convert route to a proxy route gated by the current 1208 * mesh gate, this is needed so encap can built data 1209 * frame with correct address. 1210 */ 1211 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1212 IEEE80211_MESHRT_FLAGS_VALID; 1213 rt_dest->rt_ext_seq = 1; /* random value */ 1214 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1215 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1216 rt_dest->rt_metric = rt_gate->rt_metric; 1217 rt_dest->rt_nhops = rt_gate->rt_nhops; 1218 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1219 MESH_RT_UNLOCK(ms); 1220 /* XXX: lock?? */ 1221 mcopy = m_dup(m, M_NOWAIT); 1222 for (; mcopy != NULL; mcopy = next) { 1223 next = mcopy->m_nextpkt; 1224 mcopy->m_nextpkt = NULL; 1225 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1226 rt_dest->rt_dest, 1227 "flush queued frame %p len %d", mcopy, 1228 mcopy->m_pkthdr.len); 1229 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1230 } 1231 MESH_RT_LOCK(ms); 1232 } 1233 rt_dest->rt_flags = 0; /* Mark invalid */ 1234 m_freem(m); 1235 MESH_RT_UNLOCK(ms); 1236} 1237 1238/* 1239 * Forward the specified frame. 1240 * Decrement the TTL and set TA to our MAC address. 1241 */ 1242static void 1243mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1244 const struct ieee80211_meshcntl *mc) 1245{ 1246 struct ieee80211com *ic = vap->iv_ic; 1247 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1248 struct ifnet *ifp = vap->iv_ifp; 1249 const struct ieee80211_frame *wh = 1250 mtod(m, const struct ieee80211_frame *); 1251 struct mbuf *mcopy; 1252 struct ieee80211_meshcntl *mccopy; 1253 struct ieee80211_frame *whcopy; 1254 struct ieee80211_node *ni; 1255 int err; 1256 1257 /* This is called from the RX path - don't hold this lock */ 1258 IEEE80211_TX_UNLOCK_ASSERT(ic); 1259 1260 /* 1261 * mesh ttl of 1 means we are the last one receving it, 1262 * according to amendment we decrement and then check if 1263 * 0, if so we dont forward. 1264 */ 1265 if (mc->mc_ttl < 1) { 1266 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1267 "%s", "frame not fwd'd, ttl 1"); 1268 vap->iv_stats.is_mesh_fwd_ttl++; 1269 return; 1270 } 1271 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1272 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1273 "%s", "frame not fwd'd, fwding disabled"); 1274 vap->iv_stats.is_mesh_fwd_disabled++; 1275 return; 1276 } 1277 mcopy = m_dup(m, M_NOWAIT); 1278 if (mcopy == NULL) { 1279 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1280 "%s", "frame not fwd'd, cannot dup"); 1281 vap->iv_stats.is_mesh_fwd_nobuf++; 1282 ifp->if_oerrors++; 1283 return; 1284 } 1285 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1286 sizeof(struct ieee80211_meshcntl)); 1287 if (mcopy == NULL) { 1288 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1289 "%s", "frame not fwd'd, too short"); 1290 vap->iv_stats.is_mesh_fwd_tooshort++; 1291 ifp->if_oerrors++; 1292 m_freem(mcopy); 1293 return; 1294 } 1295 whcopy = mtod(mcopy, struct ieee80211_frame *); 1296 mccopy = (struct ieee80211_meshcntl *) 1297 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1298 /* XXX clear other bits? */ 1299 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1300 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1301 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1302 ni = ieee80211_ref_node(vap->iv_bss); 1303 mcopy->m_flags |= M_MCAST; 1304 } else { 1305 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1306 if (ni == NULL) { 1307 /* 1308 * [Optional] any of the following three actions: 1309 * o silently discard 1310 * o trigger a path discovery 1311 * o inform TA that meshDA is unknown. 1312 */ 1313 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1314 "%s", "frame not fwd'd, no path"); 1315 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1316 IEEE80211_REASON_MESH_PERR_NO_FI); 1317 vap->iv_stats.is_mesh_fwd_nopath++; 1318 m_freem(mcopy); 1319 return; 1320 } 1321 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1322 } 1323 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1324 mccopy->mc_ttl--; 1325 1326 /* XXX calculate priority so drivers can find the tx queue */ 1327 M_WME_SETAC(mcopy, WME_AC_BE); 1328 1329 /* XXX do we know m_nextpkt is NULL? */ 1330 mcopy->m_pkthdr.rcvif = (void *) ni; 1331 1332 /* 1333 * XXX this bypasses all of the VAP TX handling; it passes frames 1334 * directly to the parent interface. 1335 * 1336 * Because of this, there's no TX lock being held as there's no 1337 * encaps state being used. 1338 * 1339 * Doing a direct parent transmit may not be the correct thing 1340 * to do here; we'll have to re-think this soon. 1341 */ 1342 IEEE80211_TX_LOCK(ic); 1343 err = ieee80211_parent_transmit(ic, mcopy); 1344 IEEE80211_TX_UNLOCK(ic); 1345 if (err != 0) { 1346 /* NB: IFQ_HANDOFF reclaims mbuf */ 1347 ieee80211_free_node(ni); 1348 } else { 1349 ifp->if_opackets++; 1350 } 1351} 1352 1353static struct mbuf * 1354mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1355{ 1356#define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1357#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1358 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1359 sizeof(struct ieee80211_meshcntl_ae10)]; 1360 const struct ieee80211_qosframe_addr4 *wh; 1361 const struct ieee80211_meshcntl_ae10 *mc; 1362 struct ether_header *eh; 1363 struct llc *llc; 1364 int ae; 1365 1366 if (m->m_len < hdrlen + sizeof(*llc) && 1367 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1368 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1369 "discard data frame: %s", "m_pullup failed"); 1370 vap->iv_stats.is_rx_tooshort++; 1371 return NULL; 1372 } 1373 memcpy(b, mtod(m, caddr_t), hdrlen); 1374 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1375 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1376 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1377 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1378 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1379 1380 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1381 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1382 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1383 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1384 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1385 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1386 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1387 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1388 llc = NULL; 1389 } else { 1390 m_adj(m, hdrlen - sizeof(*eh)); 1391 } 1392 eh = mtod(m, struct ether_header *); 1393 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1394 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1395 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1396 if (ae == IEEE80211_MESH_AE_00) { 1397 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1398 } else if (ae == IEEE80211_MESH_AE_01) { 1399 IEEE80211_ADDR_COPY(eh->ether_shost, 1400 MC01(mc)->mc_addr4); 1401 } else { 1402 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1403 (const struct ieee80211_frame *)wh, NULL, 1404 "bad AE %d", ae); 1405 vap->iv_stats.is_mesh_badae++; 1406 m_freem(m); 1407 return NULL; 1408 } 1409 } else { 1410 if (ae == IEEE80211_MESH_AE_00) { 1411 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1412 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1413 } else if (ae == IEEE80211_MESH_AE_10) { 1414 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1415 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1416 } else { 1417 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1418 (const struct ieee80211_frame *)wh, NULL, 1419 "bad AE %d", ae); 1420 vap->iv_stats.is_mesh_badae++; 1421 m_freem(m); 1422 return NULL; 1423 } 1424 } 1425#ifndef __NO_STRICT_ALIGNMENT 1426 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1427 m = ieee80211_realign(vap, m, sizeof(*eh)); 1428 if (m == NULL) 1429 return NULL; 1430 } 1431#endif /* !__NO_STRICT_ALIGNMENT */ 1432 if (llc != NULL) { 1433 eh = mtod(m, struct ether_header *); 1434 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1435 } 1436 return m; 1437#undef WDIR 1438#undef MC01 1439} 1440 1441/* 1442 * Return non-zero if the unicast mesh data frame should be processed 1443 * locally. Frames that are not proxy'd have our address, otherwise 1444 * we need to consult the routing table to look for a proxy entry. 1445 */ 1446static __inline int 1447mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1448 const struct ieee80211_meshcntl *mc) 1449{ 1450 int ae = mc->mc_flags & 3; 1451 1452 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1453 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1454 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1455 ("bad AE %d", ae)); 1456 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1457 const struct ieee80211_meshcntl_ae10 *mc10 = 1458 (const struct ieee80211_meshcntl_ae10 *) mc; 1459 struct ieee80211_mesh_route *rt = 1460 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1461 /* check for proxy route to ourself */ 1462 return (rt != NULL && 1463 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1464 } else /* ucast w/o proxy */ 1465 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1466} 1467 1468/* 1469 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1470 * > 0 means we have forwarded data and no need to process locally 1471 * == 0 means we want to process locally (and we may have forwarded data 1472 * < 0 means there was an error and data should be discarded 1473 */ 1474static int 1475mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1476 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1477{ 1478 struct ieee80211_qosframe_addr4 *qwh; 1479 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1480 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1481 1482 /* This is called from the RX path - don't hold this lock */ 1483 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1484 1485 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1486 1487 /* 1488 * TODO: 1489 * o verify addr2 is a legitimate transmitter 1490 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1491 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1492 */ 1493 1494 /* set lifetime of addr3 (meshDA) to initial value */ 1495 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1496 if (rt_meshda == NULL) { 1497 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1498 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1499 /* 1500 * [Optional] any of the following three actions: 1501 * o silently discard [X] 1502 * o trigger a path discovery [ ] 1503 * o inform TA that meshDA is unknown. [ ] 1504 */ 1505 /* XXX: stats */ 1506 return (-1); 1507 } 1508 1509 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1510 ms->ms_ppath->mpp_inact)); 1511 1512 /* set lifetime of addr4 (meshSA) to initial value */ 1513 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1514 KASSERT(rt_meshsa != NULL, ("no route")); 1515 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1516 ms->ms_ppath->mpp_inact)); 1517 1518 mesh_forward(vap, m, mc); 1519 return (1); /* dont process locally */ 1520} 1521 1522/* 1523 * Verifies transmitter, updates lifetime, precursor list and process data 1524 * locally, if data is proxy with AE = 10 it could mean data should go 1525 * on another mesh path or data should be forwarded to the DS. 1526 * 1527 * > 0 means we have forwarded data and no need to process locally 1528 * == 0 means we want to process locally (and we may have forwarded data 1529 * < 0 means there was an error and data should be discarded 1530 */ 1531static int 1532mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1533 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1534{ 1535 struct ieee80211_qosframe_addr4 *qwh; 1536 const struct ieee80211_meshcntl_ae10 *mc10; 1537 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1538 struct ieee80211_mesh_route *rt; 1539 int ae; 1540 1541 /* This is called from the RX path - don't hold this lock */ 1542 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1543 1544 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1545 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1546 1547 /* 1548 * TODO: 1549 * o verify addr2 is a legitimate transmitter 1550 * o lifetime of precursor entry is max(init, curr) 1551 */ 1552 1553 /* set lifetime of addr4 (meshSA) to initial value */ 1554 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1555 KASSERT(rt != NULL, ("no route")); 1556 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1557 rt = NULL; 1558 1559 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1560 KASSERT(ae == IEEE80211_MESH_AE_00 || 1561 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1562 if (ae == IEEE80211_MESH_AE_10) { 1563 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1564 return (0); /* process locally */ 1565 } 1566 1567 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1568 if (rt != NULL && 1569 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1570 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1571 /* 1572 * Forward on another mesh-path, according to 1573 * amendment as specified in 9.32.4.1 1574 */ 1575 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1576 mesh_forward(vap, m, 1577 (const struct ieee80211_meshcntl *)mc10); 1578 return (1); /* dont process locally */ 1579 } 1580 /* 1581 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1582 * addressed according to 13.11.3.2. 1583 */ 1584 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1585 "forward frame to DS, SA(%6D) DA(%6D)", 1586 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1587 } 1588 return (0); /* process locally */ 1589} 1590 1591/* 1592 * Try to forward the group addressed data on to other mesh STAs, and 1593 * also to the DS. 1594 * 1595 * > 0 means we have forwarded data and no need to process locally 1596 * == 0 means we want to process locally (and we may have forwarded data 1597 * < 0 means there was an error and data should be discarded 1598 */ 1599static int 1600mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1601 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1602{ 1603#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1604 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1605 1606 /* This is called from the RX path - don't hold this lock */ 1607 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1608 1609 mesh_forward(vap, m, mc); 1610 1611 if(mc->mc_ttl > 0) { 1612 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1613 /* 1614 * Forward of MSDUs from the MBSS to DS group addressed 1615 * (according to 13.11.3.2) 1616 * This happens by delivering the packet, and a bridge 1617 * will sent it on another port member. 1618 */ 1619 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1620 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1621 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1622 MC01(mc)->mc_addr4, "%s", 1623 "forward from MBSS to the DS"); 1624 } 1625 } 1626 return (0); /* process locally */ 1627#undef MC01 1628} 1629 1630static int 1631mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 1632{ 1633#define HAS_SEQ(type) ((type & 0x4) == 0) 1634#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1635#define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1636 struct ieee80211vap *vap = ni->ni_vap; 1637 struct ieee80211com *ic = ni->ni_ic; 1638 struct ifnet *ifp = vap->iv_ifp; 1639 struct ieee80211_frame *wh; 1640 const struct ieee80211_meshcntl *mc; 1641 int hdrspace, meshdrlen, need_tap, error; 1642 uint8_t dir, type, subtype, ae; 1643 uint32_t seq; 1644 const uint8_t *addr; 1645 uint8_t qos[2]; 1646 ieee80211_seq rxseq; 1647 1648 KASSERT(ni != NULL, ("null node")); 1649 ni->ni_inact = ni->ni_inact_reload; 1650 1651 need_tap = 1; /* mbuf need to be tapped. */ 1652 type = -1; /* undefined */ 1653 1654 /* This is called from the RX path - don't hold this lock */ 1655 IEEE80211_TX_UNLOCK_ASSERT(ic); 1656 1657 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1658 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1659 ni->ni_macaddr, NULL, 1660 "too short (1): len %u", m->m_pkthdr.len); 1661 vap->iv_stats.is_rx_tooshort++; 1662 goto out; 1663 } 1664 /* 1665 * Bit of a cheat here, we use a pointer for a 3-address 1666 * frame format but don't reference fields past outside 1667 * ieee80211_frame_min w/o first validating the data is 1668 * present. 1669 */ 1670 wh = mtod(m, struct ieee80211_frame *); 1671 1672 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1673 IEEE80211_FC0_VERSION_0) { 1674 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1675 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1676 vap->iv_stats.is_rx_badversion++; 1677 goto err; 1678 } 1679 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1680 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1681 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1682 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1683 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1684 ni->ni_noise = nf; 1685 if (HAS_SEQ(type)) { 1686 uint8_t tid = ieee80211_gettid(wh); 1687 1688 if (IEEE80211_QOS_HAS_SEQ(wh) && 1689 TID_TO_WME_AC(tid) >= WME_AC_VI) 1690 ic->ic_wme.wme_hipri_traffic++; 1691 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1692 if (! ieee80211_check_rxseq(ni, wh)) { 1693 /* duplicate, discard */ 1694 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1695 wh->i_addr1, "duplicate", 1696 "seqno <%u,%u> fragno <%u,%u> tid %u", 1697 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1698 ni->ni_rxseqs[tid] >> 1699 IEEE80211_SEQ_SEQ_SHIFT, 1700 rxseq & IEEE80211_SEQ_FRAG_MASK, 1701 ni->ni_rxseqs[tid] & 1702 IEEE80211_SEQ_FRAG_MASK, 1703 tid); 1704 vap->iv_stats.is_rx_dup++; 1705 IEEE80211_NODE_STAT(ni, rx_dup); 1706 goto out; 1707 } 1708 ni->ni_rxseqs[tid] = rxseq; 1709 } 1710 } 1711#ifdef IEEE80211_DEBUG 1712 /* 1713 * It's easier, but too expensive, to simulate different mesh 1714 * topologies by consulting the ACL policy very early, so do this 1715 * only under DEBUG. 1716 * 1717 * NB: this check is also done upon peering link initiation. 1718 */ 1719 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1720 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1721 wh, NULL, "%s", "disallowed by ACL"); 1722 vap->iv_stats.is_rx_acl++; 1723 goto out; 1724 } 1725#endif 1726 switch (type) { 1727 case IEEE80211_FC0_TYPE_DATA: 1728 if (ni == vap->iv_bss) 1729 goto out; 1730 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1731 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1732 ni->ni_macaddr, NULL, 1733 "peer link not yet established (%d)", 1734 ni->ni_mlstate); 1735 vap->iv_stats.is_mesh_nolink++; 1736 goto out; 1737 } 1738 if (dir != IEEE80211_FC1_DIR_FROMDS && 1739 dir != IEEE80211_FC1_DIR_DSTODS) { 1740 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1741 wh, "data", "incorrect dir 0x%x", dir); 1742 vap->iv_stats.is_rx_wrongdir++; 1743 goto err; 1744 } 1745 1746 /* All Mesh data frames are QoS subtype */ 1747 if (!HAS_SEQ(type)) { 1748 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1749 wh, "data", "incorrect subtype 0x%x", subtype); 1750 vap->iv_stats.is_rx_badsubtype++; 1751 goto err; 1752 } 1753 1754 /* 1755 * Next up, any fragmentation. 1756 * XXX: we defrag before we even try to forward, 1757 * Mesh Control field is not present in sub-sequent 1758 * fragmented frames. This is in contrast to Draft 4.0. 1759 */ 1760 hdrspace = ieee80211_hdrspace(ic, wh); 1761 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1762 m = ieee80211_defrag(ni, m, hdrspace); 1763 if (m == NULL) { 1764 /* Fragment dropped or frame not complete yet */ 1765 goto out; 1766 } 1767 } 1768 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1769 1770 /* 1771 * Now we have a complete Mesh Data frame. 1772 */ 1773 1774 /* 1775 * Only fromDStoDS data frames use 4 address qos frames 1776 * as specified in amendment. Otherwise addr4 is located 1777 * in the Mesh Control field and a 3 address qos frame 1778 * is used. 1779 */ 1780 if (IEEE80211_IS_DSTODS(wh)) 1781 *(uint16_t *)qos = *(uint16_t *) 1782 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1783 else 1784 *(uint16_t *)qos = *(uint16_t *) 1785 ((struct ieee80211_qosframe *)wh)->i_qos; 1786 1787 /* 1788 * NB: The mesh STA sets the Mesh Control Present 1789 * subfield to 1 in the Mesh Data frame containing 1790 * an unfragmented MSDU, an A-MSDU, or the first 1791 * fragment of an MSDU. 1792 * After defrag it should always be present. 1793 */ 1794 if (!(qos[1] & IEEE80211_QOS_MC)) { 1795 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1796 ni->ni_macaddr, NULL, 1797 "%s", "Mesh control field not present"); 1798 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1799 goto err; 1800 } 1801 1802 /* pull up enough to get to the mesh control */ 1803 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1804 (m = m_pullup(m, hdrspace + 1805 sizeof(struct ieee80211_meshcntl))) == NULL) { 1806 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1807 ni->ni_macaddr, NULL, 1808 "data too short: expecting %u", hdrspace); 1809 vap->iv_stats.is_rx_tooshort++; 1810 goto out; /* XXX */ 1811 } 1812 /* 1813 * Now calculate the full extent of the headers. Note 1814 * mesh_decap will pull up anything we didn't get 1815 * above when it strips the 802.11 headers. 1816 */ 1817 mc = (const struct ieee80211_meshcntl *) 1818 (mtod(m, const uint8_t *) + hdrspace); 1819 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1820 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1821 ae * IEEE80211_ADDR_LEN; 1822 hdrspace += meshdrlen; 1823 1824 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1825 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1826 (m->m_len < hdrspace) && 1827 ((m = m_pullup(m, hdrspace)) == NULL)) { 1828 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1829 ni->ni_macaddr, NULL, 1830 "data too short: expecting %u", hdrspace); 1831 vap->iv_stats.is_rx_tooshort++; 1832 goto out; /* XXX */ 1833 } 1834 /* XXX: are we sure there is no reallocating after m_pullup? */ 1835 1836 seq = LE_READ_4(mc->mc_seq); 1837 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1838 addr = wh->i_addr3; 1839 else if (ae == IEEE80211_MESH_AE_01) 1840 addr = MC01(mc)->mc_addr4; 1841 else 1842 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1843 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1844 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1845 addr, "data", "%s", "not to me"); 1846 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1847 goto out; 1848 } 1849 if (mesh_checkpseq(vap, addr, seq) != 0) { 1850 vap->iv_stats.is_rx_dup++; 1851 goto out; 1852 } 1853 1854 /* This code "routes" the frame to the right control path */ 1855 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1856 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1857 error = 1858 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1859 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1860 error = mesh_recv_group_data(vap, m, wh, mc); 1861 else 1862 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1863 wh, mc); 1864 } else 1865 error = mesh_recv_group_data(vap, m, wh, mc); 1866 if (error < 0) 1867 goto err; 1868 else if (error > 0) 1869 goto out; 1870 1871 if (ieee80211_radiotap_active_vap(vap)) 1872 ieee80211_radiotap_rx(vap, m); 1873 need_tap = 0; 1874 1875 /* 1876 * Finally, strip the 802.11 header. 1877 */ 1878 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1879 if (m == NULL) { 1880 /* XXX mask bit to check for both */ 1881 /* don't count Null data frames as errors */ 1882 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1883 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1884 goto out; 1885 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1886 ni->ni_macaddr, "data", "%s", "decap error"); 1887 vap->iv_stats.is_rx_decap++; 1888 IEEE80211_NODE_STAT(ni, rx_decap); 1889 goto err; 1890 } 1891 if (qos[0] & IEEE80211_QOS_AMSDU) { 1892 m = ieee80211_decap_amsdu(ni, m); 1893 if (m == NULL) 1894 return IEEE80211_FC0_TYPE_DATA; 1895 } 1896 ieee80211_deliver_data(vap, ni, m); 1897 return type; 1898 case IEEE80211_FC0_TYPE_MGT: 1899 vap->iv_stats.is_rx_mgmt++; 1900 IEEE80211_NODE_STAT(ni, rx_mgmt); 1901 if (dir != IEEE80211_FC1_DIR_NODS) { 1902 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1903 wh, "mgt", "incorrect dir 0x%x", dir); 1904 vap->iv_stats.is_rx_wrongdir++; 1905 goto err; 1906 } 1907 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1908 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1909 ni->ni_macaddr, "mgt", "too short: len %u", 1910 m->m_pkthdr.len); 1911 vap->iv_stats.is_rx_tooshort++; 1912 goto out; 1913 } 1914#ifdef IEEE80211_DEBUG 1915 if ((ieee80211_msg_debug(vap) && 1916 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1917 ieee80211_msg_dumppkts(vap)) { 1918 if_printf(ifp, "received %s from %s rssi %d\n", 1919 ieee80211_mgt_subtype_name[subtype >> 1920 IEEE80211_FC0_SUBTYPE_SHIFT], 1921 ether_sprintf(wh->i_addr2), rssi); 1922 } 1923#endif 1924 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1925 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1926 wh, NULL, "%s", "WEP set but not permitted"); 1927 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1928 goto out; 1929 } 1930 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1931 goto out; 1932 case IEEE80211_FC0_TYPE_CTL: 1933 vap->iv_stats.is_rx_ctl++; 1934 IEEE80211_NODE_STAT(ni, rx_ctrl); 1935 goto out; 1936 default: 1937 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1938 wh, "bad", "frame type 0x%x", type); 1939 /* should not come here */ 1940 break; 1941 } 1942err: 1943 ifp->if_ierrors++; 1944out: 1945 if (m != NULL) { 1946 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1947 ieee80211_radiotap_rx(vap, m); 1948 m_freem(m); 1949 } 1950 return type; 1951#undef HAS_SEQ 1952#undef MC01 1953#undef MC10 1954} 1955 1956static void 1957mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1958 int rssi, int nf) 1959{ 1960 struct ieee80211vap *vap = ni->ni_vap; 1961 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1962 struct ieee80211com *ic = ni->ni_ic; 1963 struct ieee80211_frame *wh; 1964 struct ieee80211_mesh_route *rt; 1965 uint8_t *frm, *efrm; 1966 1967 wh = mtod(m0, struct ieee80211_frame *); 1968 frm = (uint8_t *)&wh[1]; 1969 efrm = mtod(m0, uint8_t *) + m0->m_len; 1970 switch (subtype) { 1971 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1972 case IEEE80211_FC0_SUBTYPE_BEACON: 1973 { 1974 struct ieee80211_scanparams scan; 1975 /* 1976 * We process beacon/probe response 1977 * frames to discover neighbors. 1978 */ 1979 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1980 return; 1981 /* 1982 * Count frame now that we know it's to be processed. 1983 */ 1984 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1985 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1986 IEEE80211_NODE_STAT(ni, rx_beacons); 1987 } else 1988 IEEE80211_NODE_STAT(ni, rx_proberesp); 1989 /* 1990 * If scanning, just pass information to the scan module. 1991 */ 1992 if (ic->ic_flags & IEEE80211_F_SCAN) { 1993 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1994 /* 1995 * Actively scanning a channel marked passive; 1996 * send a probe request now that we know there 1997 * is 802.11 traffic present. 1998 * 1999 * XXX check if the beacon we recv'd gives 2000 * us what we need and suppress the probe req 2001 */ 2002 ieee80211_probe_curchan(vap, 1); 2003 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 2004 } 2005 ieee80211_add_scan(vap, &scan, wh, 2006 subtype, rssi, nf); 2007 return; 2008 } 2009 2010 /* The rest of this code assumes we are running */ 2011 if (vap->iv_state != IEEE80211_S_RUN) 2012 return; 2013 /* 2014 * Ignore non-mesh STAs. 2015 */ 2016 if ((scan.capinfo & 2017 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 2018 scan.meshid == NULL || scan.meshconf == NULL) { 2019 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2020 wh, "beacon", "%s", "not a mesh sta"); 2021 vap->iv_stats.is_mesh_wrongmesh++; 2022 return; 2023 } 2024 /* 2025 * Ignore STAs for other mesh networks. 2026 */ 2027 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 2028 mesh_verify_meshconf(vap, scan.meshconf)) { 2029 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2030 wh, "beacon", "%s", "not for our mesh"); 2031 vap->iv_stats.is_mesh_wrongmesh++; 2032 return; 2033 } 2034 /* 2035 * Peer only based on the current ACL policy. 2036 */ 2037 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 2038 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 2039 wh, NULL, "%s", "disallowed by ACL"); 2040 vap->iv_stats.is_rx_acl++; 2041 return; 2042 } 2043 /* 2044 * Do neighbor discovery. 2045 */ 2046 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 2047 /* 2048 * Create a new entry in the neighbor table. 2049 */ 2050 ni = ieee80211_add_neighbor(vap, wh, &scan); 2051 } 2052 /* 2053 * Automatically peer with discovered nodes if possible. 2054 */ 2055 if (ni != vap->iv_bss && 2056 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 2057 switch (ni->ni_mlstate) { 2058 case IEEE80211_NODE_MESH_IDLE: 2059 { 2060 uint16_t args[1]; 2061 2062 /* Wait for backoff callout to reset counter */ 2063 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 2064 return; 2065 2066 ni->ni_mlpid = mesh_generateid(vap); 2067 if (ni->ni_mlpid == 0) 2068 return; 2069 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 2070 args[0] = ni->ni_mlpid; 2071 ieee80211_send_action(ni, 2072 IEEE80211_ACTION_CAT_SELF_PROT, 2073 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2074 ni->ni_mlrcnt = 0; 2075 mesh_peer_timeout_setup(ni); 2076 break; 2077 } 2078 case IEEE80211_NODE_MESH_ESTABLISHED: 2079 { 2080 /* 2081 * Valid beacon from a peer mesh STA 2082 * bump TA lifetime 2083 */ 2084 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 2085 if(rt != NULL) { 2086 ieee80211_mesh_rt_update(rt, 2087 ticks_to_msecs( 2088 ms->ms_ppath->mpp_inact)); 2089 } 2090 break; 2091 } 2092 default: 2093 break; /* ignore */ 2094 } 2095 } 2096 break; 2097 } 2098 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2099 { 2100 uint8_t *ssid, *meshid, *rates, *xrates; 2101 uint8_t *sfrm; 2102 2103 if (vap->iv_state != IEEE80211_S_RUN) { 2104 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2105 wh, NULL, "wrong state %s", 2106 ieee80211_state_name[vap->iv_state]); 2107 vap->iv_stats.is_rx_mgtdiscard++; 2108 return; 2109 } 2110 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 2111 /* frame must be directed */ 2112 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2113 wh, NULL, "%s", "not unicast"); 2114 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 2115 return; 2116 } 2117 /* 2118 * prreq frame format 2119 * [tlv] ssid 2120 * [tlv] supported rates 2121 * [tlv] extended supported rates 2122 * [tlv] mesh id 2123 */ 2124 ssid = meshid = rates = xrates = NULL; 2125 sfrm = frm; 2126 while (efrm - frm > 1) { 2127 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2128 switch (*frm) { 2129 case IEEE80211_ELEMID_SSID: 2130 ssid = frm; 2131 break; 2132 case IEEE80211_ELEMID_RATES: 2133 rates = frm; 2134 break; 2135 case IEEE80211_ELEMID_XRATES: 2136 xrates = frm; 2137 break; 2138 case IEEE80211_ELEMID_MESHID: 2139 meshid = frm; 2140 break; 2141 } 2142 frm += frm[1] + 2; 2143 } 2144 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2145 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2146 if (xrates != NULL) 2147 IEEE80211_VERIFY_ELEMENT(xrates, 2148 IEEE80211_RATE_MAXSIZE - rates[1], return); 2149 if (meshid != NULL) { 2150 IEEE80211_VERIFY_ELEMENT(meshid, 2151 IEEE80211_MESHID_LEN, return); 2152 /* NB: meshid, not ssid */ 2153 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2154 } 2155 2156 /* XXX find a better class or define it's own */ 2157 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2158 "%s", "recv probe req"); 2159 /* 2160 * Some legacy 11b clients cannot hack a complete 2161 * probe response frame. When the request includes 2162 * only a bare-bones rate set, communicate this to 2163 * the transmit side. 2164 */ 2165 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2166 break; 2167 } 2168 2169 case IEEE80211_FC0_SUBTYPE_ACTION: 2170 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2171 if (ni == vap->iv_bss) { 2172 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2173 wh, NULL, "%s", "unknown node"); 2174 vap->iv_stats.is_rx_mgtdiscard++; 2175 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2176 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2177 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2178 wh, NULL, "%s", "not for us"); 2179 vap->iv_stats.is_rx_mgtdiscard++; 2180 } else if (vap->iv_state != IEEE80211_S_RUN) { 2181 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2182 wh, NULL, "wrong state %s", 2183 ieee80211_state_name[vap->iv_state]); 2184 vap->iv_stats.is_rx_mgtdiscard++; 2185 } else { 2186 if (ieee80211_parse_action(ni, m0) == 0) 2187 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2188 } 2189 break; 2190 2191 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2192 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2193 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2194 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2195 case IEEE80211_FC0_SUBTYPE_ATIM: 2196 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2197 case IEEE80211_FC0_SUBTYPE_AUTH: 2198 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2199 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2200 wh, NULL, "%s", "not handled"); 2201 vap->iv_stats.is_rx_mgtdiscard++; 2202 break; 2203 2204 default: 2205 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2206 wh, "mgt", "subtype 0x%x not handled", subtype); 2207 vap->iv_stats.is_rx_badsubtype++; 2208 break; 2209 } 2210} 2211 2212static void 2213mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2214{ 2215 2216 switch (subtype) { 2217 case IEEE80211_FC0_SUBTYPE_BAR: 2218 ieee80211_recv_bar(ni, m); 2219 break; 2220 } 2221} 2222 2223/* 2224 * Parse meshpeering action ie's for MPM frames 2225 */ 2226static const struct ieee80211_meshpeer_ie * 2227mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2228 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2229 const uint8_t *frm, const uint8_t *efrm, 2230 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2231{ 2232 struct ieee80211vap *vap = ni->ni_vap; 2233 const struct ieee80211_meshpeer_ie *mpie; 2234 uint16_t args[3]; 2235 const uint8_t *meshid, *meshconf, *meshpeer; 2236 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2237 2238 meshid = meshconf = meshpeer = NULL; 2239 while (efrm - frm > 1) { 2240 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2241 switch (*frm) { 2242 case IEEE80211_ELEMID_MESHID: 2243 meshid = frm; 2244 break; 2245 case IEEE80211_ELEMID_MESHCONF: 2246 meshconf = frm; 2247 break; 2248 case IEEE80211_ELEMID_MESHPEER: 2249 meshpeer = frm; 2250 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2251 memset(mp, 0, sizeof(*mp)); 2252 mp->peer_len = mpie->peer_len; 2253 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 2254 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 2255 switch (subtype) { 2256 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2257 mp->peer_linkid = 2258 LE_READ_2(&mpie->peer_linkid); 2259 break; 2260 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2261 /* NB: peer link ID is optional */ 2262 if (mpie->peer_len == 2263 (IEEE80211_MPM_BASE_SZ + 2)) { 2264 mp->peer_linkid = 0; 2265 mp->peer_rcode = 2266 LE_READ_2(&mpie->peer_linkid); 2267 } else { 2268 mp->peer_linkid = 2269 LE_READ_2(&mpie->peer_linkid); 2270 mp->peer_rcode = 2271 LE_READ_2(&mpie->peer_rcode); 2272 } 2273 break; 2274 } 2275 break; 2276 } 2277 frm += frm[1] + 2; 2278 } 2279 2280 /* 2281 * Verify the contents of the frame. 2282 * If it fails validation, close the peer link. 2283 */ 2284 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2285 sendclose = 1; 2286 IEEE80211_DISCARD(vap, 2287 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2288 wh, NULL, "%s", "MPM validation failed"); 2289 } 2290 2291 /* If meshid is not the same reject any frames type. */ 2292 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2293 sendclose = 1; 2294 IEEE80211_DISCARD(vap, 2295 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2296 wh, NULL, "%s", "not for our mesh"); 2297 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2298 /* 2299 * Standard not clear about this, if we dont ignore 2300 * there will be an endless loop between nodes sending 2301 * CLOSE frames between each other with wrong meshid. 2302 * Discard and timers will bring FSM to IDLE state. 2303 */ 2304 return NULL; 2305 } 2306 } 2307 2308 /* 2309 * Close frames are accepted if meshid is the same. 2310 * Verify the other two types. 2311 */ 2312 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2313 mesh_verify_meshconf(vap, meshconf)) { 2314 sendclose = 1; 2315 IEEE80211_DISCARD(vap, 2316 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2317 wh, NULL, "%s", "configuration missmatch"); 2318 } 2319 2320 if (sendclose) { 2321 vap->iv_stats.is_rx_mgtdiscard++; 2322 switch (ni->ni_mlstate) { 2323 case IEEE80211_NODE_MESH_IDLE: 2324 case IEEE80211_NODE_MESH_ESTABLISHED: 2325 case IEEE80211_NODE_MESH_HOLDING: 2326 /* ignore */ 2327 break; 2328 case IEEE80211_NODE_MESH_OPENSNT: 2329 case IEEE80211_NODE_MESH_OPENRCV: 2330 case IEEE80211_NODE_MESH_CONFIRMRCV: 2331 args[0] = ni->ni_mlpid; 2332 args[1] = ni->ni_mllid; 2333 /* Reason codes for rejection */ 2334 switch (subtype) { 2335 case IEEE80211_ACTION_MESHPEERING_OPEN: 2336 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2337 break; 2338 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2339 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2340 break; 2341 } 2342 ieee80211_send_action(ni, 2343 IEEE80211_ACTION_CAT_SELF_PROT, 2344 IEEE80211_ACTION_MESHPEERING_CLOSE, 2345 args); 2346 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2347 mesh_peer_timeout_setup(ni); 2348 break; 2349 } 2350 return NULL; 2351 } 2352 2353 return (const struct ieee80211_meshpeer_ie *) mp; 2354} 2355 2356static int 2357mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2358 const struct ieee80211_frame *wh, 2359 const uint8_t *frm, const uint8_t *efrm) 2360{ 2361 struct ieee80211vap *vap = ni->ni_vap; 2362 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2363 struct ieee80211_meshpeer_ie ie; 2364 const struct ieee80211_meshpeer_ie *meshpeer; 2365 uint16_t args[3]; 2366 2367 /* +2+2 for action + code + capabilites */ 2368 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2369 IEEE80211_ACTION_MESHPEERING_OPEN); 2370 if (meshpeer == NULL) { 2371 return 0; 2372 } 2373 2374 /* XXX move up */ 2375 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2376 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2377 2378 switch (ni->ni_mlstate) { 2379 case IEEE80211_NODE_MESH_IDLE: 2380 /* Reject open request if reached our maximum neighbor count */ 2381 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2382 args[0] = meshpeer->peer_llinkid; 2383 args[1] = 0; 2384 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2385 ieee80211_send_action(ni, 2386 IEEE80211_ACTION_CAT_SELF_PROT, 2387 IEEE80211_ACTION_MESHPEERING_CLOSE, 2388 args); 2389 /* stay in IDLE state */ 2390 return (0); 2391 } 2392 /* Open frame accepted */ 2393 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2394 ni->ni_mllid = meshpeer->peer_llinkid; 2395 ni->ni_mlpid = mesh_generateid(vap); 2396 if (ni->ni_mlpid == 0) 2397 return 0; /* XXX */ 2398 args[0] = ni->ni_mlpid; 2399 /* Announce we're open too... */ 2400 ieee80211_send_action(ni, 2401 IEEE80211_ACTION_CAT_SELF_PROT, 2402 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2403 /* ...and confirm the link. */ 2404 args[0] = ni->ni_mlpid; 2405 args[1] = ni->ni_mllid; 2406 ieee80211_send_action(ni, 2407 IEEE80211_ACTION_CAT_SELF_PROT, 2408 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2409 args); 2410 mesh_peer_timeout_setup(ni); 2411 break; 2412 case IEEE80211_NODE_MESH_OPENRCV: 2413 /* Wrong Link ID */ 2414 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2415 args[0] = ni->ni_mllid; 2416 args[1] = ni->ni_mlpid; 2417 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2418 ieee80211_send_action(ni, 2419 IEEE80211_ACTION_CAT_SELF_PROT, 2420 IEEE80211_ACTION_MESHPEERING_CLOSE, 2421 args); 2422 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2423 mesh_peer_timeout_setup(ni); 2424 break; 2425 } 2426 /* Duplicate open, confirm again. */ 2427 args[0] = ni->ni_mlpid; 2428 args[1] = ni->ni_mllid; 2429 ieee80211_send_action(ni, 2430 IEEE80211_ACTION_CAT_SELF_PROT, 2431 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2432 args); 2433 break; 2434 case IEEE80211_NODE_MESH_OPENSNT: 2435 ni->ni_mllid = meshpeer->peer_llinkid; 2436 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2437 args[0] = ni->ni_mlpid; 2438 args[1] = ni->ni_mllid; 2439 ieee80211_send_action(ni, 2440 IEEE80211_ACTION_CAT_SELF_PROT, 2441 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2442 args); 2443 /* NB: don't setup/clear any timeout */ 2444 break; 2445 case IEEE80211_NODE_MESH_CONFIRMRCV: 2446 if (ni->ni_mlpid != meshpeer->peer_linkid || 2447 ni->ni_mllid != meshpeer->peer_llinkid) { 2448 args[0] = ni->ni_mlpid; 2449 args[1] = ni->ni_mllid; 2450 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2451 ieee80211_send_action(ni, 2452 IEEE80211_ACTION_CAT_SELF_PROT, 2453 IEEE80211_ACTION_MESHPEERING_CLOSE, 2454 args); 2455 mesh_linkchange(ni, 2456 IEEE80211_NODE_MESH_HOLDING); 2457 mesh_peer_timeout_setup(ni); 2458 break; 2459 } 2460 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2461 ni->ni_mllid = meshpeer->peer_llinkid; 2462 args[0] = ni->ni_mlpid; 2463 args[1] = ni->ni_mllid; 2464 ieee80211_send_action(ni, 2465 IEEE80211_ACTION_CAT_SELF_PROT, 2466 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2467 args); 2468 mesh_peer_timeout_stop(ni); 2469 break; 2470 case IEEE80211_NODE_MESH_ESTABLISHED: 2471 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2472 args[0] = ni->ni_mllid; 2473 args[1] = ni->ni_mlpid; 2474 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2475 ieee80211_send_action(ni, 2476 IEEE80211_ACTION_CAT_SELF_PROT, 2477 IEEE80211_ACTION_MESHPEERING_CLOSE, 2478 args); 2479 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2480 mesh_peer_timeout_setup(ni); 2481 break; 2482 } 2483 args[0] = ni->ni_mlpid; 2484 args[1] = ni->ni_mllid; 2485 ieee80211_send_action(ni, 2486 IEEE80211_ACTION_CAT_SELF_PROT, 2487 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2488 args); 2489 break; 2490 case IEEE80211_NODE_MESH_HOLDING: 2491 args[0] = ni->ni_mlpid; 2492 args[1] = meshpeer->peer_llinkid; 2493 /* Standard not clear about what the reaason code should be */ 2494 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2495 ieee80211_send_action(ni, 2496 IEEE80211_ACTION_CAT_SELF_PROT, 2497 IEEE80211_ACTION_MESHPEERING_CLOSE, 2498 args); 2499 break; 2500 } 2501 return 0; 2502} 2503 2504static int 2505mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2506 const struct ieee80211_frame *wh, 2507 const uint8_t *frm, const uint8_t *efrm) 2508{ 2509 struct ieee80211vap *vap = ni->ni_vap; 2510 struct ieee80211_meshpeer_ie ie; 2511 const struct ieee80211_meshpeer_ie *meshpeer; 2512 uint16_t args[3]; 2513 2514 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2515 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2516 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2517 if (meshpeer == NULL) { 2518 return 0; 2519 } 2520 2521 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2522 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2523 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2524 2525 switch (ni->ni_mlstate) { 2526 case IEEE80211_NODE_MESH_OPENRCV: 2527 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2528 mesh_peer_timeout_stop(ni); 2529 break; 2530 case IEEE80211_NODE_MESH_OPENSNT: 2531 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2532 mesh_peer_timeout_setup(ni); 2533 break; 2534 case IEEE80211_NODE_MESH_HOLDING: 2535 args[0] = ni->ni_mlpid; 2536 args[1] = meshpeer->peer_llinkid; 2537 /* Standard not clear about what the reaason code should be */ 2538 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2539 ieee80211_send_action(ni, 2540 IEEE80211_ACTION_CAT_SELF_PROT, 2541 IEEE80211_ACTION_MESHPEERING_CLOSE, 2542 args); 2543 break; 2544 case IEEE80211_NODE_MESH_CONFIRMRCV: 2545 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2546 args[0] = ni->ni_mlpid; 2547 args[1] = ni->ni_mllid; 2548 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2549 ieee80211_send_action(ni, 2550 IEEE80211_ACTION_CAT_SELF_PROT, 2551 IEEE80211_ACTION_MESHPEERING_CLOSE, 2552 args); 2553 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2554 mesh_peer_timeout_setup(ni); 2555 } 2556 break; 2557 default: 2558 IEEE80211_DISCARD(vap, 2559 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2560 wh, NULL, "received confirm in invalid state %d", 2561 ni->ni_mlstate); 2562 vap->iv_stats.is_rx_mgtdiscard++; 2563 break; 2564 } 2565 return 0; 2566} 2567 2568static int 2569mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2570 const struct ieee80211_frame *wh, 2571 const uint8_t *frm, const uint8_t *efrm) 2572{ 2573 struct ieee80211_meshpeer_ie ie; 2574 const struct ieee80211_meshpeer_ie *meshpeer; 2575 uint16_t args[3]; 2576 2577 /* +2 for action + code */ 2578 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2579 IEEE80211_ACTION_MESHPEERING_CLOSE); 2580 if (meshpeer == NULL) { 2581 return 0; 2582 } 2583 2584 /* 2585 * XXX: check reason code, for example we could receive 2586 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2587 * to peer again. 2588 */ 2589 2590 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2591 ni, "%s", "recv PEER CLOSE"); 2592 2593 switch (ni->ni_mlstate) { 2594 case IEEE80211_NODE_MESH_IDLE: 2595 /* ignore */ 2596 break; 2597 case IEEE80211_NODE_MESH_OPENRCV: 2598 case IEEE80211_NODE_MESH_OPENSNT: 2599 case IEEE80211_NODE_MESH_CONFIRMRCV: 2600 case IEEE80211_NODE_MESH_ESTABLISHED: 2601 args[0] = ni->ni_mlpid; 2602 args[1] = ni->ni_mllid; 2603 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2604 ieee80211_send_action(ni, 2605 IEEE80211_ACTION_CAT_SELF_PROT, 2606 IEEE80211_ACTION_MESHPEERING_CLOSE, 2607 args); 2608 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2609 mesh_peer_timeout_setup(ni); 2610 break; 2611 case IEEE80211_NODE_MESH_HOLDING: 2612 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2613 mesh_peer_timeout_stop(ni); 2614 break; 2615 } 2616 return 0; 2617} 2618 2619/* 2620 * Link Metric handling. 2621 */ 2622static int 2623mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2624 const struct ieee80211_frame *wh, 2625 const uint8_t *frm, const uint8_t *efrm) 2626{ 2627 const struct ieee80211_meshlmetric_ie *ie = 2628 (const struct ieee80211_meshlmetric_ie *) 2629 (frm+2); /* action + code */ 2630 struct ieee80211_meshlmetric_ie lm_rep; 2631 2632 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2633 lm_rep.lm_flags = 0; 2634 lm_rep.lm_metric = mesh_airtime_calc(ni); 2635 ieee80211_send_action(ni, 2636 IEEE80211_ACTION_CAT_MESH, 2637 IEEE80211_ACTION_MESH_LMETRIC, 2638 &lm_rep); 2639 } 2640 /* XXX: else do nothing for now */ 2641 return 0; 2642} 2643 2644/* 2645 * Parse meshgate action ie's for GANN frames. 2646 * Returns -1 if parsing fails, otherwise 0. 2647 */ 2648static int 2649mesh_parse_meshgate_action(struct ieee80211_node *ni, 2650 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2651 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2652{ 2653 struct ieee80211vap *vap = ni->ni_vap; 2654 const struct ieee80211_meshgann_ie *gannie; 2655 2656 while (efrm - frm > 1) { 2657 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2658 switch (*frm) { 2659 case IEEE80211_ELEMID_MESHGANN: 2660 gannie = (const struct ieee80211_meshgann_ie *) frm; 2661 memset(ie, 0, sizeof(*ie)); 2662 ie->gann_ie = gannie->gann_ie; 2663 ie->gann_len = gannie->gann_len; 2664 ie->gann_flags = gannie->gann_flags; 2665 ie->gann_hopcount = gannie->gann_hopcount; 2666 ie->gann_ttl = gannie->gann_ttl; 2667 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2668 ie->gann_seq = LE_READ_4(&gannie->gann_seq); 2669 ie->gann_interval = LE_READ_2(&gannie->gann_interval); 2670 break; 2671 } 2672 frm += frm[1] + 2; 2673 } 2674 2675 return 0; 2676} 2677 2678/* 2679 * Mesh Gate Announcement handling. 2680 */ 2681static int 2682mesh_recv_action_meshgate(struct ieee80211_node *ni, 2683 const struct ieee80211_frame *wh, 2684 const uint8_t *frm, const uint8_t *efrm) 2685{ 2686 struct ieee80211vap *vap = ni->ni_vap; 2687 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2688 struct ieee80211_mesh_gate_route *gr, *next; 2689 struct ieee80211_mesh_route *rt_gate; 2690 struct ieee80211_meshgann_ie pgann; 2691 struct ieee80211_meshgann_ie ie; 2692 int found = 0; 2693 2694 /* +2 for action + code */ 2695 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2696 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2697 ni->ni_macaddr, NULL, "%s", 2698 "GANN parsing failed"); 2699 vap->iv_stats.is_rx_mgtdiscard++; 2700 return (0); 2701 } 2702 2703 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2704 return 0; 2705 2706 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2707 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2708 ie.gann_seq); 2709 2710 if (ms == NULL) 2711 return (0); 2712 MESH_RT_LOCK(ms); 2713 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2714 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2715 continue; 2716 if (ie.gann_seq <= gr->gr_lastseq) { 2717 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2718 ni->ni_macaddr, NULL, 2719 "GANN old seqno %u <= %u", 2720 ie.gann_seq, gr->gr_lastseq); 2721 MESH_RT_UNLOCK(ms); 2722 return (0); 2723 } 2724 /* corresponding mesh gate found & GANN accepted */ 2725 found = 1; 2726 break; 2727 2728 } 2729 if (found == 0) { 2730 /* this GANN is from a new mesh Gate add it to known table. */ 2731 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2732 "stored new GANN information, seq %u.", ie.gann_seq); 2733 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2734 M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO); 2735 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2736 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2737 } 2738 gr->gr_lastseq = ie.gann_seq; 2739 2740 /* check if we have a path to this gate */ 2741 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2742 if (rt_gate != NULL && 2743 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2744 gr->gr_route = rt_gate; 2745 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2746 } 2747 2748 MESH_RT_UNLOCK(ms); 2749 2750 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2751 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2752 return 0; 2753 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2754 pgann.gann_hopcount = ie.gann_hopcount + 1; 2755 pgann.gann_ttl = ie.gann_ttl - 1; 2756 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2757 pgann.gann_seq = ie.gann_seq; 2758 pgann.gann_interval = ie.gann_interval; 2759 2760 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2761 "%s", "propagate GANN"); 2762 2763 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2764 IEEE80211_ACTION_MESH_GANN, &pgann); 2765 2766 return 0; 2767} 2768 2769static int 2770mesh_send_action(struct ieee80211_node *ni, 2771 const uint8_t sa[IEEE80211_ADDR_LEN], 2772 const uint8_t da[IEEE80211_ADDR_LEN], 2773 struct mbuf *m) 2774{ 2775 struct ieee80211vap *vap = ni->ni_vap; 2776 struct ieee80211com *ic = ni->ni_ic; 2777 struct ieee80211_bpf_params params; 2778 struct ieee80211_frame *wh; 2779 int ret; 2780 2781 KASSERT(ni != NULL, ("null node")); 2782 2783 if (vap->iv_state == IEEE80211_S_CAC) { 2784 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2785 "block %s frame in CAC state", "Mesh action"); 2786 vap->iv_stats.is_tx_badstate++; 2787 ieee80211_free_node(ni); 2788 m_freem(m); 2789 return EIO; /* XXX */ 2790 } 2791 2792 M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 2793 if (m == NULL) { 2794 ieee80211_free_node(ni); 2795 return ENOMEM; 2796 } 2797 2798 IEEE80211_TX_LOCK(ic); 2799 wh = mtod(m, struct ieee80211_frame *); 2800 ieee80211_send_setup(ni, m, 2801 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2802 IEEE80211_NONQOS_TID, sa, da, sa); 2803 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2804 2805 memset(¶ms, 0, sizeof(params)); 2806 params.ibp_pri = WME_AC_VO; 2807 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2808 if (IEEE80211_IS_MULTICAST(da)) 2809 params.ibp_try0 = 1; 2810 else 2811 params.ibp_try0 = ni->ni_txparms->maxretry; 2812 params.ibp_power = ni->ni_txpower; 2813 2814 IEEE80211_NODE_STAT(ni, tx_mgmt); 2815 2816 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2817 IEEE80211_TX_UNLOCK(ic); 2818 return (ret); 2819} 2820 2821#define ADDSHORT(frm, v) do { \ 2822 frm[0] = (v) & 0xff; \ 2823 frm[1] = (v) >> 8; \ 2824 frm += 2; \ 2825} while (0) 2826#define ADDWORD(frm, v) do { \ 2827 frm[0] = (v) & 0xff; \ 2828 frm[1] = ((v) >> 8) & 0xff; \ 2829 frm[2] = ((v) >> 16) & 0xff; \ 2830 frm[3] = ((v) >> 24) & 0xff; \ 2831 frm += 4; \ 2832} while (0) 2833 2834static int 2835mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2836 int category, int action, void *args0) 2837{ 2838 struct ieee80211vap *vap = ni->ni_vap; 2839 struct ieee80211com *ic = ni->ni_ic; 2840 uint16_t *args = args0; 2841 const struct ieee80211_rateset *rs; 2842 struct mbuf *m; 2843 uint8_t *frm; 2844 2845 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2846 "send PEER OPEN action: localid 0x%x", args[0]); 2847 2848 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2849 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2850 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2851 ieee80211_ref_node(ni); 2852 2853 m = ieee80211_getmgtframe(&frm, 2854 ic->ic_headroom + sizeof(struct ieee80211_frame), 2855 sizeof(uint16_t) /* action+category */ 2856 + sizeof(uint16_t) /* capabilites */ 2857 + 2 + IEEE80211_RATE_SIZE 2858 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2859 + 2 + IEEE80211_MESHID_LEN 2860 + sizeof(struct ieee80211_meshconf_ie) 2861 + sizeof(struct ieee80211_meshpeer_ie) 2862 ); 2863 if (m != NULL) { 2864 /* 2865 * mesh peer open action frame format: 2866 * [1] category 2867 * [1] action 2868 * [2] capabilities 2869 * [tlv] rates 2870 * [tlv] xrates 2871 * [tlv] mesh id 2872 * [tlv] mesh conf 2873 * [tlv] mesh peer link mgmt 2874 */ 2875 *frm++ = category; 2876 *frm++ = action; 2877 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2878 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2879 frm = ieee80211_add_rates(frm, rs); 2880 frm = ieee80211_add_xrates(frm, rs); 2881 frm = ieee80211_add_meshid(frm, vap); 2882 frm = ieee80211_add_meshconf(frm, vap); 2883 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2884 args[0], 0, 0); 2885 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2886 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2887 } else { 2888 vap->iv_stats.is_tx_nobuf++; 2889 ieee80211_free_node(ni); 2890 return ENOMEM; 2891 } 2892} 2893 2894static int 2895mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2896 int category, int action, void *args0) 2897{ 2898 struct ieee80211vap *vap = ni->ni_vap; 2899 struct ieee80211com *ic = ni->ni_ic; 2900 uint16_t *args = args0; 2901 const struct ieee80211_rateset *rs; 2902 struct mbuf *m; 2903 uint8_t *frm; 2904 2905 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2906 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2907 args[0], args[1]); 2908 2909 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2910 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2911 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2912 ieee80211_ref_node(ni); 2913 2914 m = ieee80211_getmgtframe(&frm, 2915 ic->ic_headroom + sizeof(struct ieee80211_frame), 2916 sizeof(uint16_t) /* action+category */ 2917 + sizeof(uint16_t) /* capabilites */ 2918 + sizeof(uint16_t) /* status code */ 2919 + sizeof(uint16_t) /* AID */ 2920 + 2 + IEEE80211_RATE_SIZE 2921 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2922 + 2 + IEEE80211_MESHID_LEN 2923 + sizeof(struct ieee80211_meshconf_ie) 2924 + sizeof(struct ieee80211_meshpeer_ie) 2925 ); 2926 if (m != NULL) { 2927 /* 2928 * mesh peer confirm action frame format: 2929 * [1] category 2930 * [1] action 2931 * [2] capabilities 2932 * [2] status code 2933 * [2] association id (peer ID) 2934 * [tlv] rates 2935 * [tlv] xrates 2936 * [tlv] mesh id 2937 * [tlv] mesh conf 2938 * [tlv] mesh peer link mgmt 2939 */ 2940 *frm++ = category; 2941 *frm++ = action; 2942 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2943 ADDSHORT(frm, 0); /* status code */ 2944 ADDSHORT(frm, args[1]); /* AID */ 2945 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2946 frm = ieee80211_add_rates(frm, rs); 2947 frm = ieee80211_add_xrates(frm, rs); 2948 frm = ieee80211_add_meshid(frm, vap); 2949 frm = ieee80211_add_meshconf(frm, vap); 2950 frm = ieee80211_add_meshpeer(frm, 2951 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2952 args[0], args[1], 0); 2953 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2954 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2955 } else { 2956 vap->iv_stats.is_tx_nobuf++; 2957 ieee80211_free_node(ni); 2958 return ENOMEM; 2959 } 2960} 2961 2962static int 2963mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2964 int category, int action, void *args0) 2965{ 2966 struct ieee80211vap *vap = ni->ni_vap; 2967 struct ieee80211com *ic = ni->ni_ic; 2968 uint16_t *args = args0; 2969 struct mbuf *m; 2970 uint8_t *frm; 2971 2972 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2973 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2974 args[0], args[1], args[2]); 2975 2976 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2977 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2978 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2979 ieee80211_ref_node(ni); 2980 2981 m = ieee80211_getmgtframe(&frm, 2982 ic->ic_headroom + sizeof(struct ieee80211_frame), 2983 sizeof(uint16_t) /* action+category */ 2984 + sizeof(uint16_t) /* reason code */ 2985 + 2 + IEEE80211_MESHID_LEN 2986 + sizeof(struct ieee80211_meshpeer_ie) 2987 ); 2988 if (m != NULL) { 2989 /* 2990 * mesh peer close action frame format: 2991 * [1] category 2992 * [1] action 2993 * [tlv] mesh id 2994 * [tlv] mesh peer link mgmt 2995 */ 2996 *frm++ = category; 2997 *frm++ = action; 2998 frm = ieee80211_add_meshid(frm, vap); 2999 frm = ieee80211_add_meshpeer(frm, 3000 IEEE80211_ACTION_MESHPEERING_CLOSE, 3001 args[0], args[1], args[2]); 3002 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3003 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 3004 } else { 3005 vap->iv_stats.is_tx_nobuf++; 3006 ieee80211_free_node(ni); 3007 return ENOMEM; 3008 } 3009} 3010 3011static int 3012mesh_send_action_meshlmetric(struct ieee80211_node *ni, 3013 int category, int action, void *arg0) 3014{ 3015 struct ieee80211vap *vap = ni->ni_vap; 3016 struct ieee80211com *ic = ni->ni_ic; 3017 struct ieee80211_meshlmetric_ie *ie = arg0; 3018 struct mbuf *m; 3019 uint8_t *frm; 3020 3021 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 3022 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3023 ni, "%s", "send LINK METRIC REQUEST action"); 3024 } else { 3025 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3026 ni, "send LINK METRIC REPLY action: metric 0x%x", 3027 ie->lm_metric); 3028 } 3029 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3030 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 3031 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 3032 ieee80211_ref_node(ni); 3033 3034 m = ieee80211_getmgtframe(&frm, 3035 ic->ic_headroom + sizeof(struct ieee80211_frame), 3036 sizeof(uint16_t) + /* action+category */ 3037 sizeof(struct ieee80211_meshlmetric_ie) 3038 ); 3039 if (m != NULL) { 3040 /* 3041 * mesh link metric 3042 * [1] category 3043 * [1] action 3044 * [tlv] mesh link metric 3045 */ 3046 *frm++ = category; 3047 *frm++ = action; 3048 frm = ieee80211_add_meshlmetric(frm, 3049 ie->lm_flags, ie->lm_metric); 3050 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3051 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 3052 } else { 3053 vap->iv_stats.is_tx_nobuf++; 3054 ieee80211_free_node(ni); 3055 return ENOMEM; 3056 } 3057} 3058 3059static int 3060mesh_send_action_meshgate(struct ieee80211_node *ni, 3061 int category, int action, void *arg0) 3062{ 3063 struct ieee80211vap *vap = ni->ni_vap; 3064 struct ieee80211com *ic = ni->ni_ic; 3065 struct ieee80211_meshgann_ie *ie = arg0; 3066 struct mbuf *m; 3067 uint8_t *frm; 3068 3069 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3070 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 3071 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 3072 ieee80211_ref_node(ni); 3073 3074 m = ieee80211_getmgtframe(&frm, 3075 ic->ic_headroom + sizeof(struct ieee80211_frame), 3076 sizeof(uint16_t) + /* action+category */ 3077 IEEE80211_MESHGANN_BASE_SZ 3078 ); 3079 if (m != NULL) { 3080 /* 3081 * mesh link metric 3082 * [1] category 3083 * [1] action 3084 * [tlv] mesh gate annoucement 3085 */ 3086 *frm++ = category; 3087 *frm++ = action; 3088 frm = ieee80211_add_meshgate(frm, ie); 3089 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3090 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 3091 } else { 3092 vap->iv_stats.is_tx_nobuf++; 3093 ieee80211_free_node(ni); 3094 return ENOMEM; 3095 } 3096} 3097 3098static void 3099mesh_peer_timeout_setup(struct ieee80211_node *ni) 3100{ 3101 switch (ni->ni_mlstate) { 3102 case IEEE80211_NODE_MESH_HOLDING: 3103 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 3104 break; 3105 case IEEE80211_NODE_MESH_CONFIRMRCV: 3106 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 3107 break; 3108 case IEEE80211_NODE_MESH_IDLE: 3109 ni->ni_mltval = 0; 3110 break; 3111 default: 3112 ni->ni_mltval = ieee80211_mesh_retrytimeout; 3113 break; 3114 } 3115 if (ni->ni_mltval) 3116 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 3117 mesh_peer_timeout_cb, ni); 3118} 3119 3120/* 3121 * Same as above but backoffs timer statisically 50%. 3122 */ 3123static void 3124mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3125{ 3126 uint32_t r; 3127 3128 r = arc4random(); 3129 ni->ni_mltval += r % ni->ni_mltval; 3130 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3131 ni); 3132} 3133 3134static __inline void 3135mesh_peer_timeout_stop(struct ieee80211_node *ni) 3136{ 3137 callout_drain(&ni->ni_mltimer); 3138} 3139 3140static void 3141mesh_peer_backoff_cb(void *arg) 3142{ 3143 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3144 3145 /* After backoff timeout, try to peer automatically again. */ 3146 ni->ni_mlhcnt = 0; 3147} 3148 3149/* 3150 * Mesh Peer Link Management FSM timeout handling. 3151 */ 3152static void 3153mesh_peer_timeout_cb(void *arg) 3154{ 3155 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3156 uint16_t args[3]; 3157 3158 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3159 ni, "mesh link timeout, state %d, retry counter %d", 3160 ni->ni_mlstate, ni->ni_mlrcnt); 3161 3162 switch (ni->ni_mlstate) { 3163 case IEEE80211_NODE_MESH_IDLE: 3164 case IEEE80211_NODE_MESH_ESTABLISHED: 3165 break; 3166 case IEEE80211_NODE_MESH_OPENSNT: 3167 case IEEE80211_NODE_MESH_OPENRCV: 3168 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3169 args[0] = ni->ni_mlpid; 3170 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3171 ieee80211_send_action(ni, 3172 IEEE80211_ACTION_CAT_SELF_PROT, 3173 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3174 ni->ni_mlrcnt = 0; 3175 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3176 mesh_peer_timeout_setup(ni); 3177 } else { 3178 args[0] = ni->ni_mlpid; 3179 ieee80211_send_action(ni, 3180 IEEE80211_ACTION_CAT_SELF_PROT, 3181 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3182 ni->ni_mlrcnt++; 3183 mesh_peer_timeout_backoff(ni); 3184 } 3185 break; 3186 case IEEE80211_NODE_MESH_CONFIRMRCV: 3187 args[0] = ni->ni_mlpid; 3188 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3189 ieee80211_send_action(ni, 3190 IEEE80211_ACTION_CAT_SELF_PROT, 3191 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3192 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3193 mesh_peer_timeout_setup(ni); 3194 break; 3195 case IEEE80211_NODE_MESH_HOLDING: 3196 ni->ni_mlhcnt++; 3197 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3198 callout_reset(&ni->ni_mlhtimer, 3199 ieee80211_mesh_backofftimeout, 3200 mesh_peer_backoff_cb, ni); 3201 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3202 break; 3203 } 3204} 3205 3206static int 3207mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3208{ 3209 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3210 3211 if (ie == NULL || ie[1] != ms->ms_idlen) 3212 return 1; 3213 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3214} 3215 3216/* 3217 * Check if we are using the same algorithms for this mesh. 3218 */ 3219static int 3220mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3221{ 3222 const struct ieee80211_meshconf_ie *meshconf = 3223 (const struct ieee80211_meshconf_ie *) ie; 3224 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3225 3226 if (meshconf == NULL) 3227 return 1; 3228 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3229 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3230 "unknown path selection algorithm: 0x%x\n", 3231 meshconf->conf_pselid); 3232 return 1; 3233 } 3234 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3235 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3236 "unknown path metric algorithm: 0x%x\n", 3237 meshconf->conf_pmetid); 3238 return 1; 3239 } 3240 if (meshconf->conf_ccid != 0) { 3241 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3242 "unknown congestion control algorithm: 0x%x\n", 3243 meshconf->conf_ccid); 3244 return 1; 3245 } 3246 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3247 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3248 "unknown sync algorithm: 0x%x\n", 3249 meshconf->conf_syncid); 3250 return 1; 3251 } 3252 if (meshconf->conf_authid != 0) { 3253 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3254 "unknown auth auth algorithm: 0x%x\n", 3255 meshconf->conf_pselid); 3256 return 1; 3257 } 3258 /* Not accepting peers */ 3259 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3260 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3261 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3262 return 1; 3263 } 3264 return 0; 3265} 3266 3267static int 3268mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3269 const uint8_t *ie) 3270{ 3271 const struct ieee80211_meshpeer_ie *meshpeer = 3272 (const struct ieee80211_meshpeer_ie *) ie; 3273 3274 if (meshpeer == NULL || 3275 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3276 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3277 return 1; 3278 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3279 IEEE80211_DPRINTF(vap, 3280 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3281 "Only MPM protocol is supported (proto: 0x%02X)", 3282 meshpeer->peer_proto); 3283 return 1; 3284 } 3285 switch (subtype) { 3286 case IEEE80211_ACTION_MESHPEERING_OPEN: 3287 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3288 return 1; 3289 break; 3290 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3291 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3292 return 1; 3293 break; 3294 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3295 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3296 return 1; 3297 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3298 meshpeer->peer_linkid != 0) 3299 return 1; 3300 if (meshpeer->peer_rcode == 0) 3301 return 1; 3302 break; 3303 } 3304 return 0; 3305} 3306 3307/* 3308 * Add a Mesh ID IE to a frame. 3309 */ 3310uint8_t * 3311ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3312{ 3313 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3314 3315 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3316 3317 *frm++ = IEEE80211_ELEMID_MESHID; 3318 *frm++ = ms->ms_idlen; 3319 memcpy(frm, ms->ms_id, ms->ms_idlen); 3320 return frm + ms->ms_idlen; 3321} 3322 3323/* 3324 * Add a Mesh Configuration IE to a frame. 3325 * For now just use HWMP routing, Airtime link metric, Null Congestion 3326 * Signaling, Null Sync Protocol and Null Authentication. 3327 */ 3328uint8_t * 3329ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3330{ 3331 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3332 uint16_t caps; 3333 3334 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3335 3336 *frm++ = IEEE80211_ELEMID_MESHCONF; 3337 *frm++ = IEEE80211_MESH_CONF_SZ; 3338 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3339 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3340 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3341 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3342 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3343 /* NB: set the number of neighbors before the rest */ 3344 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3345 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3346 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3347 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3348 frm += 1; 3349 caps = 0; 3350 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3351 caps |= IEEE80211_MESHCONF_CAP_AP; 3352 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3353 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3354 *frm++ = caps; 3355 return frm; 3356} 3357 3358/* 3359 * Add a Mesh Peer Management IE to a frame. 3360 */ 3361uint8_t * 3362ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3363 uint16_t peerid, uint16_t reason) 3364{ 3365 3366 KASSERT(localid != 0, ("localid == 0")); 3367 3368 *frm++ = IEEE80211_ELEMID_MESHPEER; 3369 switch (subtype) { 3370 case IEEE80211_ACTION_MESHPEERING_OPEN: 3371 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3372 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3373 ADDSHORT(frm, localid); /* local ID */ 3374 break; 3375 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3376 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3377 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3378 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3379 ADDSHORT(frm, localid); /* local ID */ 3380 ADDSHORT(frm, peerid); /* peer ID */ 3381 break; 3382 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3383 if (peerid) 3384 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3385 else 3386 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3387 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3388 ADDSHORT(frm, localid); /* local ID */ 3389 if (peerid) 3390 ADDSHORT(frm, peerid); /* peer ID */ 3391 ADDSHORT(frm, reason); 3392 break; 3393 } 3394 return frm; 3395} 3396 3397/* 3398 * Compute an Airtime Link Metric for the link with this node. 3399 * 3400 * Based on Draft 3.0 spec (11B.10, p.149). 3401 */ 3402/* 3403 * Max 802.11s overhead. 3404 */ 3405#define IEEE80211_MESH_MAXOVERHEAD \ 3406 (sizeof(struct ieee80211_qosframe_addr4) \ 3407 + sizeof(struct ieee80211_meshcntl_ae10) \ 3408 + sizeof(struct llc) \ 3409 + IEEE80211_ADDR_LEN \ 3410 + IEEE80211_WEP_IVLEN \ 3411 + IEEE80211_WEP_KIDLEN \ 3412 + IEEE80211_WEP_CRCLEN \ 3413 + IEEE80211_WEP_MICLEN \ 3414 + IEEE80211_CRC_LEN) 3415uint32_t 3416mesh_airtime_calc(struct ieee80211_node *ni) 3417{ 3418#define M_BITS 8 3419#define S_FACTOR (2 * M_BITS) 3420 struct ieee80211com *ic = ni->ni_ic; 3421 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3422 const static int nbits = 8192 << M_BITS; 3423 uint32_t overhead, rate, errrate; 3424 uint64_t res; 3425 3426 /* Time to transmit a frame */ 3427 rate = ni->ni_txrate; 3428 overhead = ieee80211_compute_duration(ic->ic_rt, 3429 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3430 /* Error rate in percentage */ 3431 /* XXX assuming small failures are ok */ 3432 errrate = (((ifp->if_oerrors + 3433 ifp->if_ierrors) / 100) << M_BITS) / 100; 3434 res = (overhead + (nbits / rate)) * 3435 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3436 3437 return (uint32_t)(res >> S_FACTOR); 3438#undef M_BITS 3439#undef S_FACTOR 3440} 3441 3442/* 3443 * Add a Mesh Link Metric report IE to a frame. 3444 */ 3445uint8_t * 3446ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3447{ 3448 *frm++ = IEEE80211_ELEMID_MESHLINK; 3449 *frm++ = 5; 3450 *frm++ = flags; 3451 ADDWORD(frm, metric); 3452 return frm; 3453} 3454 3455/* 3456 * Add a Mesh Gate Announcement IE to a frame. 3457 */ 3458uint8_t * 3459ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3460{ 3461 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3462 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3463 *frm++ = ie->gann_flags; 3464 *frm++ = ie->gann_hopcount; 3465 *frm++ = ie->gann_ttl; 3466 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3467 frm += 6; 3468 ADDWORD(frm, ie->gann_seq); 3469 ADDSHORT(frm, ie->gann_interval); 3470 return frm; 3471} 3472#undef ADDSHORT 3473#undef ADDWORD 3474 3475/* 3476 * Initialize any mesh-specific node state. 3477 */ 3478void 3479ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3480{ 3481 ni->ni_flags |= IEEE80211_NODE_QOS; 3482 callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE); 3483 callout_init(&ni->ni_mlhtimer, CALLOUT_MPSAFE); 3484} 3485 3486/* 3487 * Cleanup any mesh-specific node state. 3488 */ 3489void 3490ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3491{ 3492 struct ieee80211vap *vap = ni->ni_vap; 3493 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3494 3495 callout_drain(&ni->ni_mltimer); 3496 callout_drain(&ni->ni_mlhtimer); 3497 /* NB: short-circuit callbacks after mesh_vdetach */ 3498 if (vap->iv_mesh != NULL) 3499 ms->ms_ppath->mpp_peerdown(ni); 3500} 3501 3502void 3503ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3504{ 3505 ni->ni_meshidlen = ie[1]; 3506 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3507} 3508 3509/* 3510 * Setup mesh-specific node state on neighbor discovery. 3511 */ 3512void 3513ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3514 const struct ieee80211_frame *wh, 3515 const struct ieee80211_scanparams *sp) 3516{ 3517 ieee80211_parse_meshid(ni, sp->meshid); 3518} 3519 3520void 3521ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3522 struct ieee80211_beacon_offsets *bo) 3523{ 3524 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3525 3526 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3527 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3528 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3529 } 3530} 3531 3532static int 3533mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3534{ 3535 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3536 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3537 struct ieee80211_mesh_route *rt; 3538 struct ieee80211req_mesh_route *imr; 3539 size_t len, off; 3540 uint8_t *p; 3541 int error; 3542 3543 if (vap->iv_opmode != IEEE80211_M_MBSS) 3544 return ENOSYS; 3545 3546 error = 0; 3547 switch (ireq->i_type) { 3548 case IEEE80211_IOC_MESH_ID: 3549 ireq->i_len = ms->ms_idlen; 3550 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3551 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3552 break; 3553 case IEEE80211_IOC_MESH_AP: 3554 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3555 break; 3556 case IEEE80211_IOC_MESH_FWRD: 3557 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3558 break; 3559 case IEEE80211_IOC_MESH_GATE: 3560 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3561 break; 3562 case IEEE80211_IOC_MESH_TTL: 3563 ireq->i_val = ms->ms_ttl; 3564 break; 3565 case IEEE80211_IOC_MESH_RTCMD: 3566 switch (ireq->i_val) { 3567 case IEEE80211_MESH_RTCMD_LIST: 3568 len = 0; 3569 MESH_RT_LOCK(ms); 3570 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3571 len += sizeof(*imr); 3572 } 3573 MESH_RT_UNLOCK(ms); 3574 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3575 ireq->i_len = len; 3576 return ENOMEM; 3577 } 3578 ireq->i_len = len; 3579 /* XXX M_WAIT? */ 3580 p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO); 3581 if (p == NULL) 3582 return ENOMEM; 3583 off = 0; 3584 MESH_RT_LOCK(ms); 3585 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3586 if (off >= len) 3587 break; 3588 imr = (struct ieee80211req_mesh_route *) 3589 (p + off); 3590 IEEE80211_ADDR_COPY(imr->imr_dest, 3591 rt->rt_dest); 3592 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3593 rt->rt_nexthop); 3594 imr->imr_metric = rt->rt_metric; 3595 imr->imr_nhops = rt->rt_nhops; 3596 imr->imr_lifetime = 3597 ieee80211_mesh_rt_update(rt, 0); 3598 imr->imr_lastmseq = rt->rt_lastmseq; 3599 imr->imr_flags = rt->rt_flags; /* last */ 3600 off += sizeof(*imr); 3601 } 3602 MESH_RT_UNLOCK(ms); 3603 error = copyout(p, (uint8_t *)ireq->i_data, 3604 ireq->i_len); 3605 free(p, M_TEMP); 3606 break; 3607 case IEEE80211_MESH_RTCMD_FLUSH: 3608 case IEEE80211_MESH_RTCMD_ADD: 3609 case IEEE80211_MESH_RTCMD_DELETE: 3610 return EINVAL; 3611 default: 3612 return ENOSYS; 3613 } 3614 break; 3615 case IEEE80211_IOC_MESH_PR_METRIC: 3616 len = strlen(ms->ms_pmetric->mpm_descr); 3617 if (ireq->i_len < len) 3618 return EINVAL; 3619 ireq->i_len = len; 3620 error = copyout(ms->ms_pmetric->mpm_descr, 3621 (uint8_t *)ireq->i_data, len); 3622 break; 3623 case IEEE80211_IOC_MESH_PR_PATH: 3624 len = strlen(ms->ms_ppath->mpp_descr); 3625 if (ireq->i_len < len) 3626 return EINVAL; 3627 ireq->i_len = len; 3628 error = copyout(ms->ms_ppath->mpp_descr, 3629 (uint8_t *)ireq->i_data, len); 3630 break; 3631 default: 3632 return ENOSYS; 3633 } 3634 3635 return error; 3636} 3637IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3638 3639static int 3640mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3641{ 3642 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3643 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3644 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3645 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3646 int error; 3647 3648 if (vap->iv_opmode != IEEE80211_M_MBSS) 3649 return ENOSYS; 3650 3651 error = 0; 3652 switch (ireq->i_type) { 3653 case IEEE80211_IOC_MESH_ID: 3654 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3655 return EINVAL; 3656 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3657 if (error != 0) 3658 break; 3659 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3660 ms->ms_idlen = ireq->i_len; 3661 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3662 error = ENETRESET; 3663 break; 3664 case IEEE80211_IOC_MESH_AP: 3665 if (ireq->i_val) 3666 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3667 else 3668 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3669 error = ENETRESET; 3670 break; 3671 case IEEE80211_IOC_MESH_FWRD: 3672 if (ireq->i_val) 3673 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3674 else 3675 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3676 mesh_gatemode_setup(vap); 3677 break; 3678 case IEEE80211_IOC_MESH_GATE: 3679 if (ireq->i_val) 3680 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3681 else 3682 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3683 break; 3684 case IEEE80211_IOC_MESH_TTL: 3685 ms->ms_ttl = (uint8_t) ireq->i_val; 3686 break; 3687 case IEEE80211_IOC_MESH_RTCMD: 3688 switch (ireq->i_val) { 3689 case IEEE80211_MESH_RTCMD_LIST: 3690 return EINVAL; 3691 case IEEE80211_MESH_RTCMD_FLUSH: 3692 ieee80211_mesh_rt_flush(vap); 3693 break; 3694 case IEEE80211_MESH_RTCMD_ADD: 3695 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3696 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3697 return EINVAL; 3698 error = copyin(ireq->i_data, &tmpaddr, 3699 IEEE80211_ADDR_LEN); 3700 if (error == 0) 3701 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3702 break; 3703 case IEEE80211_MESH_RTCMD_DELETE: 3704 ieee80211_mesh_rt_del(vap, ireq->i_data); 3705 break; 3706 default: 3707 return ENOSYS; 3708 } 3709 break; 3710 case IEEE80211_IOC_MESH_PR_METRIC: 3711 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3712 if (error == 0) { 3713 error = mesh_select_proto_metric(vap, tmpproto); 3714 if (error == 0) 3715 error = ENETRESET; 3716 } 3717 break; 3718 case IEEE80211_IOC_MESH_PR_PATH: 3719 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3720 if (error == 0) { 3721 error = mesh_select_proto_path(vap, tmpproto); 3722 if (error == 0) 3723 error = ENETRESET; 3724 } 3725 break; 3726 default: 3727 return ENOSYS; 3728 } 3729 return error; 3730} 3731IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3732