ieee80211_mesh.c revision 288086
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 288086 2015-09-22 02:25:52Z 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_var.h> 58#include <net/if_media.h> 59#include <net/if_llc.h> 60#include <net/ethernet.h> 61 62#include <net80211/ieee80211_var.h> 63#include <net80211/ieee80211_action.h> 64#ifdef IEEE80211_SUPPORT_SUPERG 65#include <net80211/ieee80211_superg.h> 66#endif 67#include <net80211/ieee80211_input.h> 68#include <net80211/ieee80211_mesh.h> 69 70static void mesh_rt_flush_invalid(struct ieee80211vap *); 71static int mesh_select_proto_path(struct ieee80211vap *, const char *); 72static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 73static void mesh_vattach(struct ieee80211vap *); 74static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 75static void mesh_rt_cleanup_cb(void *); 76static void mesh_gatemode_setup(struct ieee80211vap *); 77static void mesh_gatemode_cb(void *); 78static void mesh_linkchange(struct ieee80211_node *, 79 enum ieee80211_mesh_mlstate); 80static void mesh_checkid(void *, struct ieee80211_node *); 81static uint32_t mesh_generateid(struct ieee80211vap *); 82static int mesh_checkpseq(struct ieee80211vap *, 83 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 84static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, 85 struct ieee80211_mesh_route *); 86static void mesh_forward(struct ieee80211vap *, struct mbuf *, 87 const struct ieee80211_meshcntl *); 88static int mesh_input(struct ieee80211_node *, struct mbuf *, 89 const struct ieee80211_rx_stats *rxs, int, int); 90static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 91 const struct ieee80211_rx_stats *rxs, int, int); 92static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 93static void mesh_peer_timeout_setup(struct ieee80211_node *); 94static void mesh_peer_timeout_backoff(struct ieee80211_node *); 95static void mesh_peer_timeout_cb(void *); 96static __inline void 97 mesh_peer_timeout_stop(struct ieee80211_node *); 98static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 99static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 100static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 101 const uint8_t *); 102uint32_t mesh_airtime_calc(struct ieee80211_node *); 103 104/* 105 * Timeout values come from the specification and are in milliseconds. 106 */ 107static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 108 "IEEE 802.11s parameters"); 109static int ieee80211_mesh_gateint = -1; 110SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW, 111 &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I", 112 "mesh gate interval (ms)"); 113static int ieee80211_mesh_retrytimeout = -1; 114SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, 115 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 116 "Retry timeout (msec)"); 117static int ieee80211_mesh_holdingtimeout = -1; 118 119SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, 120 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 121 "Holding state timeout (msec)"); 122static int ieee80211_mesh_confirmtimeout = -1; 123SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, 124 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 125 "Confirm state timeout (msec)"); 126static int ieee80211_mesh_backofftimeout = -1; 127SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW, 128 &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 129 "Backoff timeout (msec). This is to throutles peering forever when " 130 "not receiving answer or is rejected by a neighbor"); 131static int ieee80211_mesh_maxretries = 2; 132SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW, 133 &ieee80211_mesh_maxretries, 0, 134 "Maximum retries during peer link establishment"); 135static int ieee80211_mesh_maxholding = 2; 136SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW, 137 &ieee80211_mesh_maxholding, 0, 138 "Maximum times we are allowed to transition to HOLDING state before " 139 "backinoff during peer link establishment"); 140 141static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 142 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 143 144static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 145static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 146static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 147static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 148static ieee80211_recv_action_func mesh_recv_action_meshgate; 149 150static ieee80211_send_action_func mesh_send_action_meshpeering_open; 151static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 152static ieee80211_send_action_func mesh_send_action_meshpeering_close; 153static ieee80211_send_action_func mesh_send_action_meshlmetric; 154static ieee80211_send_action_func mesh_send_action_meshgate; 155 156static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 157 .mpm_descr = "AIRTIME", 158 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 159 .mpm_metric = mesh_airtime_calc, 160}; 161 162static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 163static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 164 165MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 166MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 167MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame"); 168 169/* The longer one of the lifetime should be stored as new lifetime */ 170#define MESH_ROUTE_LIFETIME_MAX(a, b) (a > b ? a : b) 171 172MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 173MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table"); 174 175/* 176 * Helper functions to manipulate the Mesh routing table. 177 */ 178 179static struct ieee80211_mesh_route * 180mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 181 const uint8_t dest[IEEE80211_ADDR_LEN]) 182{ 183 struct ieee80211_mesh_route *rt; 184 185 MESH_RT_LOCK_ASSERT(ms); 186 187 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 188 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 189 return rt; 190 } 191 return NULL; 192} 193 194static struct ieee80211_mesh_route * 195mesh_rt_add_locked(struct ieee80211vap *vap, 196 const uint8_t dest[IEEE80211_ADDR_LEN]) 197{ 198 struct ieee80211_mesh_state *ms = vap->iv_mesh; 199 struct ieee80211_mesh_route *rt; 200 201 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 202 ("%s: adding broadcast to the routing table", __func__)); 203 204 MESH_RT_LOCK_ASSERT(ms); 205 206 rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) + 207 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, 208 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 209 if (rt != NULL) { 210 rt->rt_vap = vap; 211 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 212 rt->rt_priv = (void *)ALIGN(&rt[1]); 213 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT"); 214 callout_init(&rt->rt_discovery, 1); 215 rt->rt_updtime = ticks; /* create time */ 216 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 217 } 218 return rt; 219} 220 221struct ieee80211_mesh_route * 222ieee80211_mesh_rt_find(struct ieee80211vap *vap, 223 const uint8_t dest[IEEE80211_ADDR_LEN]) 224{ 225 struct ieee80211_mesh_state *ms = vap->iv_mesh; 226 struct ieee80211_mesh_route *rt; 227 228 MESH_RT_LOCK(ms); 229 rt = mesh_rt_find_locked(ms, dest); 230 MESH_RT_UNLOCK(ms); 231 return rt; 232} 233 234struct ieee80211_mesh_route * 235ieee80211_mesh_rt_add(struct ieee80211vap *vap, 236 const uint8_t dest[IEEE80211_ADDR_LEN]) 237{ 238 struct ieee80211_mesh_state *ms = vap->iv_mesh; 239 struct ieee80211_mesh_route *rt; 240 241 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 242 ("%s: duplicate entry in the routing table", __func__)); 243 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 244 ("%s: adding self to the routing table", __func__)); 245 246 MESH_RT_LOCK(ms); 247 rt = mesh_rt_add_locked(vap, dest); 248 MESH_RT_UNLOCK(ms); 249 return rt; 250} 251 252/* 253 * Update the route lifetime and returns the updated lifetime. 254 * If new_lifetime is zero and route is timedout it will be invalidated. 255 * new_lifetime is in msec 256 */ 257int 258ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 259{ 260 int timesince, now; 261 uint32_t lifetime = 0; 262 263 KASSERT(rt != NULL, ("route is NULL")); 264 265 now = ticks; 266 MESH_RT_ENTRY_LOCK(rt); 267 268 /* dont clobber a proxy entry gated by us */ 269 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 270 MESH_RT_ENTRY_UNLOCK(rt); 271 return rt->rt_lifetime; 272 } 273 274 timesince = ticks_to_msecs(now - rt->rt_updtime); 275 rt->rt_updtime = now; 276 if (timesince >= rt->rt_lifetime) { 277 if (new_lifetime != 0) { 278 rt->rt_lifetime = new_lifetime; 279 } 280 else { 281 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 282 rt->rt_lifetime = 0; 283 } 284 } else { 285 /* update what is left of lifetime */ 286 rt->rt_lifetime = rt->rt_lifetime - timesince; 287 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 288 new_lifetime, rt->rt_lifetime); 289 } 290 lifetime = rt->rt_lifetime; 291 MESH_RT_ENTRY_UNLOCK(rt); 292 293 return lifetime; 294} 295 296/* 297 * Add a proxy route (as needed) for the specified destination. 298 */ 299void 300ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 301 const uint8_t dest[IEEE80211_ADDR_LEN]) 302{ 303 struct ieee80211_mesh_state *ms = vap->iv_mesh; 304 struct ieee80211_mesh_route *rt; 305 306 MESH_RT_LOCK(ms); 307 rt = mesh_rt_find_locked(ms, dest); 308 if (rt == NULL) { 309 rt = mesh_rt_add_locked(vap, dest); 310 if (rt == NULL) { 311 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 312 "%s", "unable to add proxy entry"); 313 vap->iv_stats.is_mesh_rtaddfailed++; 314 } else { 315 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 316 "%s", "add proxy entry"); 317 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 318 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 319 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 320 | IEEE80211_MESHRT_FLAGS_PROXY; 321 } 322 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 323 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 324 ("no proxy flag for poxy entry")); 325 struct ieee80211com *ic = vap->iv_ic; 326 /* 327 * Fix existing entry created by received frames from 328 * stations that have some memory of dest. We also 329 * flush any frames held on the staging queue; delivering 330 * them is too much trouble right now. 331 */ 332 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 333 "%s", "fix proxy entry"); 334 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 335 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 336 | IEEE80211_MESHRT_FLAGS_PROXY; 337 /* XXX belongs in hwmp */ 338 ieee80211_ageq_drain_node(&ic->ic_stageq, 339 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 340 /* XXX stat? */ 341 } 342 MESH_RT_UNLOCK(ms); 343} 344 345static __inline void 346mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 347{ 348 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 349 /* 350 * Grab the lock before destroying it, to be sure no one else 351 * is holding the route. 352 */ 353 MESH_RT_ENTRY_LOCK(rt); 354 callout_drain(&rt->rt_discovery); 355 MESH_RT_ENTRY_LOCK_DESTROY(rt); 356 IEEE80211_FREE(rt, M_80211_MESH_RT); 357} 358 359void 360ieee80211_mesh_rt_del(struct ieee80211vap *vap, 361 const uint8_t dest[IEEE80211_ADDR_LEN]) 362{ 363 struct ieee80211_mesh_state *ms = vap->iv_mesh; 364 struct ieee80211_mesh_route *rt, *next; 365 366 MESH_RT_LOCK(ms); 367 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 368 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 369 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 370 ms->ms_ppath->mpp_senderror(vap, dest, rt, 371 IEEE80211_REASON_MESH_PERR_NO_PROXY); 372 } else { 373 ms->ms_ppath->mpp_senderror(vap, dest, rt, 374 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 375 } 376 mesh_rt_del(ms, rt); 377 MESH_RT_UNLOCK(ms); 378 return; 379 } 380 } 381 MESH_RT_UNLOCK(ms); 382} 383 384void 385ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 386{ 387 struct ieee80211_mesh_state *ms = vap->iv_mesh; 388 struct ieee80211_mesh_route *rt, *next; 389 390 if (ms == NULL) 391 return; 392 MESH_RT_LOCK(ms); 393 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 394 mesh_rt_del(ms, rt); 395 MESH_RT_UNLOCK(ms); 396} 397 398void 399ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 400 const uint8_t peer[IEEE80211_ADDR_LEN]) 401{ 402 struct ieee80211_mesh_state *ms = vap->iv_mesh; 403 struct ieee80211_mesh_route *rt, *next; 404 405 MESH_RT_LOCK(ms); 406 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 407 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 408 mesh_rt_del(ms, rt); 409 } 410 MESH_RT_UNLOCK(ms); 411} 412 413/* 414 * Flush expired routing entries, i.e. those in invalid state for 415 * some time. 416 */ 417static void 418mesh_rt_flush_invalid(struct ieee80211vap *vap) 419{ 420 struct ieee80211_mesh_state *ms = vap->iv_mesh; 421 struct ieee80211_mesh_route *rt, *next; 422 423 if (ms == NULL) 424 return; 425 MESH_RT_LOCK(ms); 426 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 427 /* Discover paths will be deleted by their own callout */ 428 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 429 continue; 430 ieee80211_mesh_rt_update(rt, 0); 431 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 432 mesh_rt_del(ms, rt); 433 } 434 MESH_RT_UNLOCK(ms); 435} 436 437int 438ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 439{ 440 int i, firstempty = -1; 441 442 for (i = 0; i < nitems(mesh_proto_paths); i++) { 443 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 444 IEEE80211_MESH_PROTO_DSZ) == 0) 445 return EEXIST; 446 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 447 firstempty = i; 448 } 449 if (firstempty < 0) 450 return ENOSPC; 451 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 452 mesh_proto_paths[firstempty].mpp_active = 1; 453 return 0; 454} 455 456int 457ieee80211_mesh_register_proto_metric(const struct 458 ieee80211_mesh_proto_metric *mpm) 459{ 460 int i, firstempty = -1; 461 462 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 463 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 464 IEEE80211_MESH_PROTO_DSZ) == 0) 465 return EEXIST; 466 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 467 firstempty = i; 468 } 469 if (firstempty < 0) 470 return ENOSPC; 471 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 472 mesh_proto_metrics[firstempty].mpm_active = 1; 473 return 0; 474} 475 476static int 477mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 478{ 479 struct ieee80211_mesh_state *ms = vap->iv_mesh; 480 int i; 481 482 for (i = 0; i < nitems(mesh_proto_paths); i++) { 483 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 484 ms->ms_ppath = &mesh_proto_paths[i]; 485 return 0; 486 } 487 } 488 return ENOENT; 489} 490 491static int 492mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 493{ 494 struct ieee80211_mesh_state *ms = vap->iv_mesh; 495 int i; 496 497 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 498 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 499 ms->ms_pmetric = &mesh_proto_metrics[i]; 500 return 0; 501 } 502 } 503 return ENOENT; 504} 505 506static void 507mesh_gatemode_setup(struct ieee80211vap *vap) 508{ 509 struct ieee80211_mesh_state *ms = vap->iv_mesh; 510 511 /* 512 * NB: When a mesh gate is running as a ROOT it shall 513 * not send out periodic GANNs but instead mark the 514 * mesh gate flag for the corresponding proactive PREQ 515 * and RANN frames. 516 */ 517 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 518 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 519 callout_drain(&ms->ms_gatetimer); 520 return ; 521 } 522 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 523 mesh_gatemode_cb, vap); 524} 525 526static void 527mesh_gatemode_cb(void *arg) 528{ 529 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 530 struct ieee80211_mesh_state *ms = vap->iv_mesh; 531 struct ieee80211_meshgann_ie gann; 532 533 gann.gann_flags = 0; /* Reserved */ 534 gann.gann_hopcount = 0; 535 gann.gann_ttl = ms->ms_ttl; 536 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 537 gann.gann_seq = ms->ms_gateseq++; 538 gann.gann_interval = ieee80211_mesh_gateint; 539 540 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 541 "send broadcast GANN (seq %u)", gann.gann_seq); 542 543 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 544 IEEE80211_ACTION_MESH_GANN, &gann); 545 mesh_gatemode_setup(vap); 546} 547 548static void 549ieee80211_mesh_init(void) 550{ 551 552 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 553 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 554 555 /* 556 * Setup mesh parameters that depends on the clock frequency. 557 */ 558 ieee80211_mesh_gateint = msecs_to_ticks(10000); 559 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 560 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 561 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 562 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 563 564 /* 565 * Register action frame handlers. 566 */ 567 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 568 IEEE80211_ACTION_MESHPEERING_OPEN, 569 mesh_recv_action_meshpeering_open); 570 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 571 IEEE80211_ACTION_MESHPEERING_CONFIRM, 572 mesh_recv_action_meshpeering_confirm); 573 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 574 IEEE80211_ACTION_MESHPEERING_CLOSE, 575 mesh_recv_action_meshpeering_close); 576 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 577 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 578 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 579 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 580 581 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 582 IEEE80211_ACTION_MESHPEERING_OPEN, 583 mesh_send_action_meshpeering_open); 584 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 585 IEEE80211_ACTION_MESHPEERING_CONFIRM, 586 mesh_send_action_meshpeering_confirm); 587 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 588 IEEE80211_ACTION_MESHPEERING_CLOSE, 589 mesh_send_action_meshpeering_close); 590 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 591 IEEE80211_ACTION_MESH_LMETRIC, 592 mesh_send_action_meshlmetric); 593 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 594 IEEE80211_ACTION_MESH_GANN, 595 mesh_send_action_meshgate); 596 597 /* 598 * Register Airtime Link Metric. 599 */ 600 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 601 602} 603SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 604 605void 606ieee80211_mesh_attach(struct ieee80211com *ic) 607{ 608 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 609} 610 611void 612ieee80211_mesh_detach(struct ieee80211com *ic) 613{ 614} 615 616static void 617mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 618{ 619 struct ieee80211com *ic = ni->ni_ic; 620 uint16_t args[3]; 621 622 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 623 args[0] = ni->ni_mlpid; 624 args[1] = ni->ni_mllid; 625 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 626 ieee80211_send_action(ni, 627 IEEE80211_ACTION_CAT_SELF_PROT, 628 IEEE80211_ACTION_MESHPEERING_CLOSE, 629 args); 630 } 631 callout_drain(&ni->ni_mltimer); 632 /* XXX belongs in hwmp */ 633 ieee80211_ageq_drain_node(&ic->ic_stageq, 634 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 635} 636 637static void 638mesh_vdetach(struct ieee80211vap *vap) 639{ 640 struct ieee80211_mesh_state *ms = vap->iv_mesh; 641 642 callout_drain(&ms->ms_cleantimer); 643 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 644 NULL); 645 ieee80211_mesh_rt_flush(vap); 646 MESH_RT_LOCK_DESTROY(ms); 647 ms->ms_ppath->mpp_vdetach(vap); 648 IEEE80211_FREE(vap->iv_mesh, M_80211_VAP); 649 vap->iv_mesh = NULL; 650} 651 652static void 653mesh_vattach(struct ieee80211vap *vap) 654{ 655 struct ieee80211_mesh_state *ms; 656 vap->iv_newstate = mesh_newstate; 657 vap->iv_input = mesh_input; 658 vap->iv_opdetach = mesh_vdetach; 659 vap->iv_recv_mgmt = mesh_recv_mgmt; 660 vap->iv_recv_ctl = mesh_recv_ctl; 661 ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 662 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 663 if (ms == NULL) { 664 printf("%s: couldn't alloc MBSS state\n", __func__); 665 return; 666 } 667 vap->iv_mesh = ms; 668 ms->ms_seq = 0; 669 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 670 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 671 TAILQ_INIT(&ms->ms_known_gates); 672 TAILQ_INIT(&ms->ms_routes); 673 MESH_RT_LOCK_INIT(ms, "MBSS"); 674 callout_init(&ms->ms_cleantimer, 1); 675 callout_init(&ms->ms_gatetimer, 1); 676 ms->ms_gateseq = 0; 677 mesh_select_proto_metric(vap, "AIRTIME"); 678 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 679 mesh_select_proto_path(vap, "HWMP"); 680 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 681 ms->ms_ppath->mpp_vattach(vap); 682} 683 684/* 685 * IEEE80211_M_MBSS vap state machine handler. 686 */ 687static int 688mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 689{ 690 struct ieee80211_mesh_state *ms = vap->iv_mesh; 691 struct ieee80211com *ic = vap->iv_ic; 692 struct ieee80211_node *ni; 693 enum ieee80211_state ostate; 694 695 IEEE80211_LOCK_ASSERT(ic); 696 697 ostate = vap->iv_state; 698 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 699 __func__, ieee80211_state_name[ostate], 700 ieee80211_state_name[nstate], arg); 701 vap->iv_state = nstate; /* state transition */ 702 if (ostate != IEEE80211_S_SCAN) 703 ieee80211_cancel_scan(vap); /* background scan */ 704 ni = vap->iv_bss; /* NB: no reference held */ 705 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 706 callout_drain(&ms->ms_cleantimer); 707 callout_drain(&ms->ms_gatetimer); 708 } 709 switch (nstate) { 710 case IEEE80211_S_INIT: 711 switch (ostate) { 712 case IEEE80211_S_SCAN: 713 ieee80211_cancel_scan(vap); 714 break; 715 case IEEE80211_S_CAC: 716 ieee80211_dfs_cac_stop(vap); 717 break; 718 case IEEE80211_S_RUN: 719 ieee80211_iterate_nodes(&ic->ic_sta, 720 mesh_vdetach_peers, NULL); 721 break; 722 default: 723 break; 724 } 725 if (ostate != IEEE80211_S_INIT) { 726 /* NB: optimize INIT -> INIT case */ 727 ieee80211_reset_bss(vap); 728 ieee80211_mesh_rt_flush(vap); 729 } 730 break; 731 case IEEE80211_S_SCAN: 732 switch (ostate) { 733 case IEEE80211_S_INIT: 734 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 735 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 736 ms->ms_idlen != 0) { 737 /* 738 * Already have a channel and a mesh ID; bypass 739 * the scan and startup immediately. 740 */ 741 ieee80211_create_ibss(vap, vap->iv_des_chan); 742 break; 743 } 744 /* 745 * Initiate a scan. We can come here as a result 746 * of an IEEE80211_IOC_SCAN_REQ too in which case 747 * the vap will be marked with IEEE80211_FEXT_SCANREQ 748 * and the scan request parameters will be present 749 * in iv_scanreq. Otherwise we do the default. 750 */ 751 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 752 ieee80211_check_scan(vap, 753 vap->iv_scanreq_flags, 754 vap->iv_scanreq_duration, 755 vap->iv_scanreq_mindwell, 756 vap->iv_scanreq_maxdwell, 757 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 758 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 759 } else 760 ieee80211_check_scan_current(vap); 761 break; 762 default: 763 break; 764 } 765 break; 766 case IEEE80211_S_CAC: 767 /* 768 * Start CAC on a DFS channel. We come here when starting 769 * a bss on a DFS channel (see ieee80211_create_ibss). 770 */ 771 ieee80211_dfs_cac_start(vap); 772 break; 773 case IEEE80211_S_RUN: 774 switch (ostate) { 775 case IEEE80211_S_INIT: 776 /* 777 * Already have a channel; bypass the 778 * scan and startup immediately. 779 * Note that ieee80211_create_ibss will call 780 * back to do a RUN->RUN state change. 781 */ 782 ieee80211_create_ibss(vap, 783 ieee80211_ht_adjust_channel(ic, 784 ic->ic_curchan, vap->iv_flags_ht)); 785 /* NB: iv_bss is changed on return */ 786 break; 787 case IEEE80211_S_CAC: 788 /* 789 * NB: This is the normal state change when CAC 790 * expires and no radar was detected; no need to 791 * clear the CAC timer as it's already expired. 792 */ 793 /* fall thru... */ 794 case IEEE80211_S_CSA: 795#if 0 796 /* 797 * Shorten inactivity timer of associated stations 798 * to weed out sta's that don't follow a CSA. 799 */ 800 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 801#endif 802 /* 803 * Update bss node channel to reflect where 804 * we landed after CSA. 805 */ 806 ieee80211_node_set_chan(vap->iv_bss, 807 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 808 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 809 /* XXX bypass debug msgs */ 810 break; 811 case IEEE80211_S_SCAN: 812 case IEEE80211_S_RUN: 813#ifdef IEEE80211_DEBUG 814 if (ieee80211_msg_debug(vap)) { 815 struct ieee80211_node *ni = vap->iv_bss; 816 ieee80211_note(vap, 817 "synchronized with %s meshid ", 818 ether_sprintf(ni->ni_meshid)); 819 ieee80211_print_essid(ni->ni_meshid, 820 ni->ni_meshidlen); 821 /* XXX MCS/HT */ 822 printf(" channel %d\n", 823 ieee80211_chan2ieee(ic, ic->ic_curchan)); 824 } 825#endif 826 break; 827 default: 828 break; 829 } 830 ieee80211_node_authorize(vap->iv_bss); 831 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 832 mesh_rt_cleanup_cb, vap); 833 mesh_gatemode_setup(vap); 834 break; 835 default: 836 break; 837 } 838 /* NB: ostate not nstate */ 839 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 840 return 0; 841} 842 843static void 844mesh_rt_cleanup_cb(void *arg) 845{ 846 struct ieee80211vap *vap = arg; 847 struct ieee80211_mesh_state *ms = vap->iv_mesh; 848 849 mesh_rt_flush_invalid(vap); 850 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 851 mesh_rt_cleanup_cb, vap); 852} 853 854/* 855 * Mark a mesh STA as gate and return a pointer to it. 856 * If this is first time, we create a new gate route. 857 * Always update the path route to this mesh gate. 858 */ 859struct ieee80211_mesh_gate_route * 860ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 861 struct ieee80211_mesh_route *rt) 862{ 863 struct ieee80211_mesh_state *ms = vap->iv_mesh; 864 struct ieee80211_mesh_gate_route *gr = NULL, *next; 865 int found = 0; 866 867 MESH_RT_LOCK(ms); 868 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 869 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 870 found = 1; 871 break; 872 } 873 } 874 875 if (!found) { 876 /* New mesh gate add it to known table. */ 877 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 878 "%s", "stored new gate information from pro-PREQ."); 879 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 880 M_80211_MESH_GT_RT, 881 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 882 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 883 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 884 } 885 gr->gr_route = rt; 886 /* TODO: link from path route to gate route */ 887 MESH_RT_UNLOCK(ms); 888 889 return gr; 890} 891 892 893/* 894 * Helper function to note the Mesh Peer Link FSM change. 895 */ 896static void 897mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 898{ 899 struct ieee80211vap *vap = ni->ni_vap; 900 struct ieee80211_mesh_state *ms = vap->iv_mesh; 901#ifdef IEEE80211_DEBUG 902 static const char *meshlinkstates[] = { 903 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 904 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 905 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 906 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 907 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 908 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 909 }; 910#endif 911 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 912 ni, "peer link: %s -> %s", 913 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 914 915 /* track neighbor count */ 916 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 917 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 918 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 919 ms->ms_neighbors++; 920 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 921 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 922 state != IEEE80211_NODE_MESH_ESTABLISHED) { 923 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 924 ms->ms_neighbors--; 925 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 926 } 927 ni->ni_mlstate = state; 928 switch (state) { 929 case IEEE80211_NODE_MESH_HOLDING: 930 ms->ms_ppath->mpp_peerdown(ni); 931 break; 932 case IEEE80211_NODE_MESH_ESTABLISHED: 933 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 934 break; 935 default: 936 break; 937 } 938} 939 940/* 941 * Helper function to generate a unique local ID required for mesh 942 * peer establishment. 943 */ 944static void 945mesh_checkid(void *arg, struct ieee80211_node *ni) 946{ 947 uint16_t *r = arg; 948 949 if (*r == ni->ni_mllid) 950 *(uint16_t *)arg = 0; 951} 952 953static uint32_t 954mesh_generateid(struct ieee80211vap *vap) 955{ 956 int maxiter = 4; 957 uint16_t r; 958 959 do { 960 get_random_bytes(&r, 2); 961 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 962 maxiter--; 963 } while (r == 0 && maxiter > 0); 964 return r; 965} 966 967/* 968 * Verifies if we already received this packet by checking its 969 * sequence number. 970 * Returns 0 if the frame is to be accepted, 1 otherwise. 971 */ 972static int 973mesh_checkpseq(struct ieee80211vap *vap, 974 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 975{ 976 struct ieee80211_mesh_route *rt; 977 978 rt = ieee80211_mesh_rt_find(vap, source); 979 if (rt == NULL) { 980 rt = ieee80211_mesh_rt_add(vap, source); 981 if (rt == NULL) { 982 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 983 "%s", "add mcast route failed"); 984 vap->iv_stats.is_mesh_rtaddfailed++; 985 return 1; 986 } 987 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 988 "add mcast route, mesh seqno %d", seq); 989 rt->rt_lastmseq = seq; 990 return 0; 991 } 992 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 993 return 1; 994 } else { 995 rt->rt_lastmseq = seq; 996 return 0; 997 } 998} 999 1000/* 1001 * Iterate the routing table and locate the next hop. 1002 */ 1003struct ieee80211_node * 1004ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1005 const uint8_t dest[IEEE80211_ADDR_LEN]) 1006{ 1007 struct ieee80211_mesh_route *rt; 1008 1009 rt = ieee80211_mesh_rt_find(vap, dest); 1010 if (rt == NULL) 1011 return NULL; 1012 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1013 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1014 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1015 /* XXX stat */ 1016 return NULL; 1017 } 1018 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1019 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1020 if (rt == NULL) return NULL; 1021 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1022 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1023 "%s: meshgate !valid, flags 0x%x", __func__, 1024 rt->rt_flags); 1025 /* XXX stat */ 1026 return NULL; 1027 } 1028 } 1029 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1030} 1031 1032static void 1033mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1034 struct ieee80211_mesh_route *rt_gate) 1035{ 1036 struct ifnet *ifp = vap->iv_ifp; 1037 struct ieee80211_node *ni; 1038 1039 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1040 1041 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1042 if (ni == NULL) { 1043 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1044 m_freem(m); 1045 return; 1046 } 1047 1048 /* 1049 * Send through the VAP packet transmit path. 1050 * This consumes the node ref grabbed above and 1051 * the mbuf, regardless of whether there's a problem 1052 * or not. 1053 */ 1054 (void) ieee80211_vap_pkt_send_dest(vap, m, ni); 1055} 1056 1057/* 1058 * Forward the queued frames to known valid mesh gates. 1059 * Assume destination to be outside the MBSS (i.e. proxy entry), 1060 * If no valid mesh gates are known silently discard queued frames. 1061 * After transmitting frames to all known valid mesh gates, this route 1062 * will be marked invalid, and a new path discovery will happen in the hopes 1063 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1064 */ 1065void 1066ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1067 struct ieee80211_mesh_route *rt_dest) 1068{ 1069 struct ieee80211com *ic = vap->iv_ic; 1070 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1071 struct ieee80211_mesh_route *rt_gate; 1072 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1073 struct mbuf *m, *mcopy, *next; 1074 1075 IEEE80211_TX_UNLOCK_ASSERT(ic); 1076 1077 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1078 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1079 1080 /* XXX: send to more than one valid mash gate */ 1081 MESH_RT_LOCK(ms); 1082 1083 m = ieee80211_ageq_remove(&ic->ic_stageq, 1084 (struct ieee80211_node *)(uintptr_t) 1085 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1086 1087 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1088 rt_gate = gr->gr_route; 1089 if (rt_gate == NULL) { 1090 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1091 rt_dest->rt_dest, 1092 "mesh gate with no path %6D", 1093 gr->gr_addr, ":"); 1094 continue; 1095 } 1096 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1097 continue; 1098 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1099 ("route not marked as a mesh gate")); 1100 KASSERT((rt_gate->rt_flags & 1101 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1102 ("found mesh gate that is also marked porxy")); 1103 /* 1104 * convert route to a proxy route gated by the current 1105 * mesh gate, this is needed so encap can built data 1106 * frame with correct address. 1107 */ 1108 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1109 IEEE80211_MESHRT_FLAGS_VALID; 1110 rt_dest->rt_ext_seq = 1; /* random value */ 1111 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1112 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1113 rt_dest->rt_metric = rt_gate->rt_metric; 1114 rt_dest->rt_nhops = rt_gate->rt_nhops; 1115 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1116 MESH_RT_UNLOCK(ms); 1117 /* XXX: lock?? */ 1118 mcopy = m_dup(m, M_NOWAIT); 1119 for (; mcopy != NULL; mcopy = next) { 1120 next = mcopy->m_nextpkt; 1121 mcopy->m_nextpkt = NULL; 1122 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1123 rt_dest->rt_dest, 1124 "flush queued frame %p len %d", mcopy, 1125 mcopy->m_pkthdr.len); 1126 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1127 } 1128 MESH_RT_LOCK(ms); 1129 } 1130 rt_dest->rt_flags = 0; /* Mark invalid */ 1131 m_freem(m); 1132 MESH_RT_UNLOCK(ms); 1133} 1134 1135/* 1136 * Forward the specified frame. 1137 * Decrement the TTL and set TA to our MAC address. 1138 */ 1139static void 1140mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1141 const struct ieee80211_meshcntl *mc) 1142{ 1143 struct ieee80211com *ic = vap->iv_ic; 1144 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1145 struct ifnet *ifp = vap->iv_ifp; 1146 const struct ieee80211_frame *wh = 1147 mtod(m, const struct ieee80211_frame *); 1148 struct mbuf *mcopy; 1149 struct ieee80211_meshcntl *mccopy; 1150 struct ieee80211_frame *whcopy; 1151 struct ieee80211_node *ni; 1152 int err; 1153 1154 /* This is called from the RX path - don't hold this lock */ 1155 IEEE80211_TX_UNLOCK_ASSERT(ic); 1156 1157 /* 1158 * mesh ttl of 1 means we are the last one receving it, 1159 * according to amendment we decrement and then check if 1160 * 0, if so we dont forward. 1161 */ 1162 if (mc->mc_ttl < 1) { 1163 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1164 "%s", "frame not fwd'd, ttl 1"); 1165 vap->iv_stats.is_mesh_fwd_ttl++; 1166 return; 1167 } 1168 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1169 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1170 "%s", "frame not fwd'd, fwding disabled"); 1171 vap->iv_stats.is_mesh_fwd_disabled++; 1172 return; 1173 } 1174 mcopy = m_dup(m, M_NOWAIT); 1175 if (mcopy == NULL) { 1176 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1177 "%s", "frame not fwd'd, cannot dup"); 1178 vap->iv_stats.is_mesh_fwd_nobuf++; 1179 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1180 return; 1181 } 1182 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1183 sizeof(struct ieee80211_meshcntl)); 1184 if (mcopy == NULL) { 1185 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1186 "%s", "frame not fwd'd, too short"); 1187 vap->iv_stats.is_mesh_fwd_tooshort++; 1188 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1189 m_freem(mcopy); 1190 return; 1191 } 1192 whcopy = mtod(mcopy, struct ieee80211_frame *); 1193 mccopy = (struct ieee80211_meshcntl *) 1194 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1195 /* XXX clear other bits? */ 1196 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1197 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1198 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1199 ni = ieee80211_ref_node(vap->iv_bss); 1200 mcopy->m_flags |= M_MCAST; 1201 } else { 1202 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1203 if (ni == NULL) { 1204 /* 1205 * [Optional] any of the following three actions: 1206 * o silently discard 1207 * o trigger a path discovery 1208 * o inform TA that meshDA is unknown. 1209 */ 1210 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1211 "%s", "frame not fwd'd, no path"); 1212 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1213 IEEE80211_REASON_MESH_PERR_NO_FI); 1214 vap->iv_stats.is_mesh_fwd_nopath++; 1215 m_freem(mcopy); 1216 return; 1217 } 1218 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1219 } 1220 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1221 mccopy->mc_ttl--; 1222 1223 /* XXX calculate priority so drivers can find the tx queue */ 1224 M_WME_SETAC(mcopy, WME_AC_BE); 1225 1226 /* XXX do we know m_nextpkt is NULL? */ 1227 mcopy->m_pkthdr.rcvif = (void *) ni; 1228 1229 /* 1230 * XXX this bypasses all of the VAP TX handling; it passes frames 1231 * directly to the parent interface. 1232 * 1233 * Because of this, there's no TX lock being held as there's no 1234 * encaps state being used. 1235 * 1236 * Doing a direct parent transmit may not be the correct thing 1237 * to do here; we'll have to re-think this soon. 1238 */ 1239 IEEE80211_TX_LOCK(ic); 1240 err = ieee80211_parent_xmitpkt(ic, mcopy); 1241 IEEE80211_TX_UNLOCK(ic); 1242 if (err != 0) { 1243 /* NB: IFQ_HANDOFF reclaims mbuf */ 1244 ieee80211_free_node(ni); 1245 } else { 1246 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1247 } 1248} 1249 1250static struct mbuf * 1251mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1252{ 1253#define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1254#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1255 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1256 sizeof(struct ieee80211_meshcntl_ae10)]; 1257 const struct ieee80211_qosframe_addr4 *wh; 1258 const struct ieee80211_meshcntl_ae10 *mc; 1259 struct ether_header *eh; 1260 struct llc *llc; 1261 int ae; 1262 1263 if (m->m_len < hdrlen + sizeof(*llc) && 1264 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1265 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1266 "discard data frame: %s", "m_pullup failed"); 1267 vap->iv_stats.is_rx_tooshort++; 1268 return NULL; 1269 } 1270 memcpy(b, mtod(m, caddr_t), hdrlen); 1271 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1272 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1273 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1274 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1275 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1276 1277 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1278 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1279 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1280 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1281 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1282 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1283 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1284 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1285 llc = NULL; 1286 } else { 1287 m_adj(m, hdrlen - sizeof(*eh)); 1288 } 1289 eh = mtod(m, struct ether_header *); 1290 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1291 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1292 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1293 if (ae == IEEE80211_MESH_AE_00) { 1294 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1295 } else if (ae == IEEE80211_MESH_AE_01) { 1296 IEEE80211_ADDR_COPY(eh->ether_shost, 1297 MC01(mc)->mc_addr4); 1298 } else { 1299 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1300 (const struct ieee80211_frame *)wh, NULL, 1301 "bad AE %d", ae); 1302 vap->iv_stats.is_mesh_badae++; 1303 m_freem(m); 1304 return NULL; 1305 } 1306 } else { 1307 if (ae == IEEE80211_MESH_AE_00) { 1308 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1309 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1310 } else if (ae == IEEE80211_MESH_AE_10) { 1311 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1312 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1313 } else { 1314 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1315 (const struct ieee80211_frame *)wh, NULL, 1316 "bad AE %d", ae); 1317 vap->iv_stats.is_mesh_badae++; 1318 m_freem(m); 1319 return NULL; 1320 } 1321 } 1322#ifndef __NO_STRICT_ALIGNMENT 1323 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1324 m = ieee80211_realign(vap, m, sizeof(*eh)); 1325 if (m == NULL) 1326 return NULL; 1327 } 1328#endif /* !__NO_STRICT_ALIGNMENT */ 1329 if (llc != NULL) { 1330 eh = mtod(m, struct ether_header *); 1331 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1332 } 1333 return m; 1334#undef WDIR 1335#undef MC01 1336} 1337 1338/* 1339 * Return non-zero if the unicast mesh data frame should be processed 1340 * locally. Frames that are not proxy'd have our address, otherwise 1341 * we need to consult the routing table to look for a proxy entry. 1342 */ 1343static __inline int 1344mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1345 const struct ieee80211_meshcntl *mc) 1346{ 1347 int ae = mc->mc_flags & 3; 1348 1349 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1350 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1351 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1352 ("bad AE %d", ae)); 1353 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1354 const struct ieee80211_meshcntl_ae10 *mc10 = 1355 (const struct ieee80211_meshcntl_ae10 *) mc; 1356 struct ieee80211_mesh_route *rt = 1357 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1358 /* check for proxy route to ourself */ 1359 return (rt != NULL && 1360 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1361 } else /* ucast w/o proxy */ 1362 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1363} 1364 1365/* 1366 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1367 * > 0 means we have forwarded data and no need to process locally 1368 * == 0 means we want to process locally (and we may have forwarded data 1369 * < 0 means there was an error and data should be discarded 1370 */ 1371static int 1372mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1373 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1374{ 1375 struct ieee80211_qosframe_addr4 *qwh; 1376 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1377 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1378 1379 /* This is called from the RX path - don't hold this lock */ 1380 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1381 1382 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1383 1384 /* 1385 * TODO: 1386 * o verify addr2 is a legitimate transmitter 1387 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1388 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1389 */ 1390 1391 /* set lifetime of addr3 (meshDA) to initial value */ 1392 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1393 if (rt_meshda == NULL) { 1394 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1395 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1396 /* 1397 * [Optional] any of the following three actions: 1398 * o silently discard [X] 1399 * o trigger a path discovery [ ] 1400 * o inform TA that meshDA is unknown. [ ] 1401 */ 1402 /* XXX: stats */ 1403 return (-1); 1404 } 1405 1406 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1407 ms->ms_ppath->mpp_inact)); 1408 1409 /* set lifetime of addr4 (meshSA) to initial value */ 1410 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1411 KASSERT(rt_meshsa != NULL, ("no route")); 1412 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1413 ms->ms_ppath->mpp_inact)); 1414 1415 mesh_forward(vap, m, mc); 1416 return (1); /* dont process locally */ 1417} 1418 1419/* 1420 * Verifies transmitter, updates lifetime, precursor list and process data 1421 * locally, if data is proxy with AE = 10 it could mean data should go 1422 * on another mesh path or data should be forwarded to the DS. 1423 * 1424 * > 0 means we have forwarded data and no need to process locally 1425 * == 0 means we want to process locally (and we may have forwarded data 1426 * < 0 means there was an error and data should be discarded 1427 */ 1428static int 1429mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1430 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1431{ 1432 struct ieee80211_qosframe_addr4 *qwh; 1433 const struct ieee80211_meshcntl_ae10 *mc10; 1434 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1435 struct ieee80211_mesh_route *rt; 1436 int ae; 1437 1438 /* This is called from the RX path - don't hold this lock */ 1439 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1440 1441 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1442 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1443 1444 /* 1445 * TODO: 1446 * o verify addr2 is a legitimate transmitter 1447 * o lifetime of precursor entry is max(init, curr) 1448 */ 1449 1450 /* set lifetime of addr4 (meshSA) to initial value */ 1451 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1452 KASSERT(rt != NULL, ("no route")); 1453 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1454 rt = NULL; 1455 1456 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1457 KASSERT(ae == IEEE80211_MESH_AE_00 || 1458 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1459 if (ae == IEEE80211_MESH_AE_10) { 1460 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1461 return (0); /* process locally */ 1462 } 1463 1464 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1465 if (rt != NULL && 1466 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1467 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1468 /* 1469 * Forward on another mesh-path, according to 1470 * amendment as specified in 9.32.4.1 1471 */ 1472 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1473 mesh_forward(vap, m, 1474 (const struct ieee80211_meshcntl *)mc10); 1475 return (1); /* dont process locally */ 1476 } 1477 /* 1478 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1479 * addressed according to 13.11.3.2. 1480 */ 1481 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1482 "forward frame to DS, SA(%6D) DA(%6D)", 1483 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1484 } 1485 return (0); /* process locally */ 1486} 1487 1488/* 1489 * Try to forward the group addressed data on to other mesh STAs, and 1490 * also to the DS. 1491 * 1492 * > 0 means we have forwarded data and no need to process locally 1493 * == 0 means we want to process locally (and we may have forwarded data 1494 * < 0 means there was an error and data should be discarded 1495 */ 1496static int 1497mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1498 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1499{ 1500#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1501 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1502 1503 /* This is called from the RX path - don't hold this lock */ 1504 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1505 1506 mesh_forward(vap, m, mc); 1507 1508 if(mc->mc_ttl > 0) { 1509 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1510 /* 1511 * Forward of MSDUs from the MBSS to DS group addressed 1512 * (according to 13.11.3.2) 1513 * This happens by delivering the packet, and a bridge 1514 * will sent it on another port member. 1515 */ 1516 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1517 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1518 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1519 MC01(mc)->mc_addr4, "%s", 1520 "forward from MBSS to the DS"); 1521 } 1522 } 1523 return (0); /* process locally */ 1524#undef MC01 1525} 1526 1527static int 1528mesh_input(struct ieee80211_node *ni, struct mbuf *m, 1529 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1530{ 1531#define HAS_SEQ(type) ((type & 0x4) == 0) 1532#define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1533#define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1534 struct ieee80211vap *vap = ni->ni_vap; 1535 struct ieee80211com *ic = ni->ni_ic; 1536 struct ifnet *ifp = vap->iv_ifp; 1537 struct ieee80211_frame *wh; 1538 const struct ieee80211_meshcntl *mc; 1539 int hdrspace, meshdrlen, need_tap, error; 1540 uint8_t dir, type, subtype, ae; 1541 uint32_t seq; 1542 const uint8_t *addr; 1543 uint8_t qos[2]; 1544 ieee80211_seq rxseq; 1545 1546 KASSERT(ni != NULL, ("null node")); 1547 ni->ni_inact = ni->ni_inact_reload; 1548 1549 need_tap = 1; /* mbuf need to be tapped. */ 1550 type = -1; /* undefined */ 1551 1552 /* This is called from the RX path - don't hold this lock */ 1553 IEEE80211_TX_UNLOCK_ASSERT(ic); 1554 1555 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1556 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1557 ni->ni_macaddr, NULL, 1558 "too short (1): len %u", m->m_pkthdr.len); 1559 vap->iv_stats.is_rx_tooshort++; 1560 goto out; 1561 } 1562 /* 1563 * Bit of a cheat here, we use a pointer for a 3-address 1564 * frame format but don't reference fields past outside 1565 * ieee80211_frame_min w/o first validating the data is 1566 * present. 1567 */ 1568 wh = mtod(m, struct ieee80211_frame *); 1569 1570 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1571 IEEE80211_FC0_VERSION_0) { 1572 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1573 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1574 vap->iv_stats.is_rx_badversion++; 1575 goto err; 1576 } 1577 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1578 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1579 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1580 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1581 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1582 ni->ni_noise = nf; 1583 if (HAS_SEQ(type)) { 1584 uint8_t tid = ieee80211_gettid(wh); 1585 1586 if (IEEE80211_QOS_HAS_SEQ(wh) && 1587 TID_TO_WME_AC(tid) >= WME_AC_VI) 1588 ic->ic_wme.wme_hipri_traffic++; 1589 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1590 if (! ieee80211_check_rxseq(ni, wh)) { 1591 /* duplicate, discard */ 1592 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1593 wh->i_addr1, "duplicate", 1594 "seqno <%u,%u> fragno <%u,%u> tid %u", 1595 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1596 ni->ni_rxseqs[tid] >> 1597 IEEE80211_SEQ_SEQ_SHIFT, 1598 rxseq & IEEE80211_SEQ_FRAG_MASK, 1599 ni->ni_rxseqs[tid] & 1600 IEEE80211_SEQ_FRAG_MASK, 1601 tid); 1602 vap->iv_stats.is_rx_dup++; 1603 IEEE80211_NODE_STAT(ni, rx_dup); 1604 goto out; 1605 } 1606 ni->ni_rxseqs[tid] = rxseq; 1607 } 1608 } 1609#ifdef IEEE80211_DEBUG 1610 /* 1611 * It's easier, but too expensive, to simulate different mesh 1612 * topologies by consulting the ACL policy very early, so do this 1613 * only under DEBUG. 1614 * 1615 * NB: this check is also done upon peering link initiation. 1616 */ 1617 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1618 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1619 wh, NULL, "%s", "disallowed by ACL"); 1620 vap->iv_stats.is_rx_acl++; 1621 goto out; 1622 } 1623#endif 1624 switch (type) { 1625 case IEEE80211_FC0_TYPE_DATA: 1626 if (ni == vap->iv_bss) 1627 goto out; 1628 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1629 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1630 ni->ni_macaddr, NULL, 1631 "peer link not yet established (%d)", 1632 ni->ni_mlstate); 1633 vap->iv_stats.is_mesh_nolink++; 1634 goto out; 1635 } 1636 if (dir != IEEE80211_FC1_DIR_FROMDS && 1637 dir != IEEE80211_FC1_DIR_DSTODS) { 1638 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1639 wh, "data", "incorrect dir 0x%x", dir); 1640 vap->iv_stats.is_rx_wrongdir++; 1641 goto err; 1642 } 1643 1644 /* All Mesh data frames are QoS subtype */ 1645 if (!HAS_SEQ(type)) { 1646 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1647 wh, "data", "incorrect subtype 0x%x", subtype); 1648 vap->iv_stats.is_rx_badsubtype++; 1649 goto err; 1650 } 1651 1652 /* 1653 * Next up, any fragmentation. 1654 * XXX: we defrag before we even try to forward, 1655 * Mesh Control field is not present in sub-sequent 1656 * fragmented frames. This is in contrast to Draft 4.0. 1657 */ 1658 hdrspace = ieee80211_hdrspace(ic, wh); 1659 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1660 m = ieee80211_defrag(ni, m, hdrspace); 1661 if (m == NULL) { 1662 /* Fragment dropped or frame not complete yet */ 1663 goto out; 1664 } 1665 } 1666 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1667 1668 /* 1669 * Now we have a complete Mesh Data frame. 1670 */ 1671 1672 /* 1673 * Only fromDStoDS data frames use 4 address qos frames 1674 * as specified in amendment. Otherwise addr4 is located 1675 * in the Mesh Control field and a 3 address qos frame 1676 * is used. 1677 */ 1678 if (IEEE80211_IS_DSTODS(wh)) 1679 *(uint16_t *)qos = *(uint16_t *) 1680 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1681 else 1682 *(uint16_t *)qos = *(uint16_t *) 1683 ((struct ieee80211_qosframe *)wh)->i_qos; 1684 1685 /* 1686 * NB: The mesh STA sets the Mesh Control Present 1687 * subfield to 1 in the Mesh Data frame containing 1688 * an unfragmented MSDU, an A-MSDU, or the first 1689 * fragment of an MSDU. 1690 * After defrag it should always be present. 1691 */ 1692 if (!(qos[1] & IEEE80211_QOS_MC)) { 1693 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1694 ni->ni_macaddr, NULL, 1695 "%s", "Mesh control field not present"); 1696 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1697 goto err; 1698 } 1699 1700 /* pull up enough to get to the mesh control */ 1701 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1702 (m = m_pullup(m, hdrspace + 1703 sizeof(struct ieee80211_meshcntl))) == NULL) { 1704 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1705 ni->ni_macaddr, NULL, 1706 "data too short: expecting %u", hdrspace); 1707 vap->iv_stats.is_rx_tooshort++; 1708 goto out; /* XXX */ 1709 } 1710 /* 1711 * Now calculate the full extent of the headers. Note 1712 * mesh_decap will pull up anything we didn't get 1713 * above when it strips the 802.11 headers. 1714 */ 1715 mc = (const struct ieee80211_meshcntl *) 1716 (mtod(m, const uint8_t *) + hdrspace); 1717 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1718 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1719 ae * IEEE80211_ADDR_LEN; 1720 hdrspace += meshdrlen; 1721 1722 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1723 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1724 (m->m_len < hdrspace) && 1725 ((m = m_pullup(m, hdrspace)) == NULL)) { 1726 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1727 ni->ni_macaddr, NULL, 1728 "data too short: expecting %u", hdrspace); 1729 vap->iv_stats.is_rx_tooshort++; 1730 goto out; /* XXX */ 1731 } 1732 /* XXX: are we sure there is no reallocating after m_pullup? */ 1733 1734 seq = LE_READ_4(mc->mc_seq); 1735 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1736 addr = wh->i_addr3; 1737 else if (ae == IEEE80211_MESH_AE_01) 1738 addr = MC01(mc)->mc_addr4; 1739 else 1740 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1741 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1742 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1743 addr, "data", "%s", "not to me"); 1744 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1745 goto out; 1746 } 1747 if (mesh_checkpseq(vap, addr, seq) != 0) { 1748 vap->iv_stats.is_rx_dup++; 1749 goto out; 1750 } 1751 1752 /* This code "routes" the frame to the right control path */ 1753 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1754 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1755 error = 1756 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1757 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1758 error = mesh_recv_group_data(vap, m, wh, mc); 1759 else 1760 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1761 wh, mc); 1762 } else 1763 error = mesh_recv_group_data(vap, m, wh, mc); 1764 if (error < 0) 1765 goto err; 1766 else if (error > 0) 1767 goto out; 1768 1769 if (ieee80211_radiotap_active_vap(vap)) 1770 ieee80211_radiotap_rx(vap, m); 1771 need_tap = 0; 1772 1773 /* 1774 * Finally, strip the 802.11 header. 1775 */ 1776 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1777 if (m == NULL) { 1778 /* XXX mask bit to check for both */ 1779 /* don't count Null data frames as errors */ 1780 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1781 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1782 goto out; 1783 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1784 ni->ni_macaddr, "data", "%s", "decap error"); 1785 vap->iv_stats.is_rx_decap++; 1786 IEEE80211_NODE_STAT(ni, rx_decap); 1787 goto err; 1788 } 1789 if (qos[0] & IEEE80211_QOS_AMSDU) { 1790 m = ieee80211_decap_amsdu(ni, m); 1791 if (m == NULL) 1792 return IEEE80211_FC0_TYPE_DATA; 1793 } 1794 ieee80211_deliver_data(vap, ni, m); 1795 return type; 1796 case IEEE80211_FC0_TYPE_MGT: 1797 vap->iv_stats.is_rx_mgmt++; 1798 IEEE80211_NODE_STAT(ni, rx_mgmt); 1799 if (dir != IEEE80211_FC1_DIR_NODS) { 1800 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1801 wh, "mgt", "incorrect dir 0x%x", dir); 1802 vap->iv_stats.is_rx_wrongdir++; 1803 goto err; 1804 } 1805 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1806 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1807 ni->ni_macaddr, "mgt", "too short: len %u", 1808 m->m_pkthdr.len); 1809 vap->iv_stats.is_rx_tooshort++; 1810 goto out; 1811 } 1812#ifdef IEEE80211_DEBUG 1813 if ((ieee80211_msg_debug(vap) && 1814 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1815 ieee80211_msg_dumppkts(vap)) { 1816 if_printf(ifp, "received %s from %s rssi %d\n", 1817 ieee80211_mgt_subtype_name[subtype >> 1818 IEEE80211_FC0_SUBTYPE_SHIFT], 1819 ether_sprintf(wh->i_addr2), rssi); 1820 } 1821#endif 1822 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1823 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1824 wh, NULL, "%s", "WEP set but not permitted"); 1825 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1826 goto out; 1827 } 1828 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 1829 goto out; 1830 case IEEE80211_FC0_TYPE_CTL: 1831 vap->iv_stats.is_rx_ctl++; 1832 IEEE80211_NODE_STAT(ni, rx_ctrl); 1833 goto out; 1834 default: 1835 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1836 wh, "bad", "frame type 0x%x", type); 1837 /* should not come here */ 1838 break; 1839 } 1840err: 1841 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1842out: 1843 if (m != NULL) { 1844 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1845 ieee80211_radiotap_rx(vap, m); 1846 m_freem(m); 1847 } 1848 return type; 1849#undef HAS_SEQ 1850#undef MC01 1851#undef MC10 1852} 1853 1854static void 1855mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1856 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1857{ 1858 struct ieee80211vap *vap = ni->ni_vap; 1859 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1860 struct ieee80211com *ic = ni->ni_ic; 1861 struct ieee80211_channel *rxchan = ic->ic_curchan; 1862 struct ieee80211_frame *wh; 1863 struct ieee80211_mesh_route *rt; 1864 uint8_t *frm, *efrm; 1865 1866 wh = mtod(m0, struct ieee80211_frame *); 1867 frm = (uint8_t *)&wh[1]; 1868 efrm = mtod(m0, uint8_t *) + m0->m_len; 1869 switch (subtype) { 1870 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1871 case IEEE80211_FC0_SUBTYPE_BEACON: 1872 { 1873 struct ieee80211_scanparams scan; 1874 struct ieee80211_channel *c; 1875 /* 1876 * We process beacon/probe response 1877 * frames to discover neighbors. 1878 */ 1879 if (rxs != NULL) { 1880 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1881 if (c != NULL) 1882 rxchan = c; 1883 } 1884 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) 1885 return; 1886 /* 1887 * Count frame now that we know it's to be processed. 1888 */ 1889 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1890 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1891 IEEE80211_NODE_STAT(ni, rx_beacons); 1892 } else 1893 IEEE80211_NODE_STAT(ni, rx_proberesp); 1894 /* 1895 * If scanning, just pass information to the scan module. 1896 */ 1897 if (ic->ic_flags & IEEE80211_F_SCAN) { 1898 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1899 /* 1900 * Actively scanning a channel marked passive; 1901 * send a probe request now that we know there 1902 * is 802.11 traffic present. 1903 * 1904 * XXX check if the beacon we recv'd gives 1905 * us what we need and suppress the probe req 1906 */ 1907 ieee80211_probe_curchan(vap, 1); 1908 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1909 } 1910 ieee80211_add_scan(vap, rxchan, &scan, wh, 1911 subtype, rssi, nf); 1912 return; 1913 } 1914 1915 /* The rest of this code assumes we are running */ 1916 if (vap->iv_state != IEEE80211_S_RUN) 1917 return; 1918 /* 1919 * Ignore non-mesh STAs. 1920 */ 1921 if ((scan.capinfo & 1922 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1923 scan.meshid == NULL || scan.meshconf == NULL) { 1924 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1925 wh, "beacon", "%s", "not a mesh sta"); 1926 vap->iv_stats.is_mesh_wrongmesh++; 1927 return; 1928 } 1929 /* 1930 * Ignore STAs for other mesh networks. 1931 */ 1932 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1933 mesh_verify_meshconf(vap, scan.meshconf)) { 1934 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1935 wh, "beacon", "%s", "not for our mesh"); 1936 vap->iv_stats.is_mesh_wrongmesh++; 1937 return; 1938 } 1939 /* 1940 * Peer only based on the current ACL policy. 1941 */ 1942 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1943 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1944 wh, NULL, "%s", "disallowed by ACL"); 1945 vap->iv_stats.is_rx_acl++; 1946 return; 1947 } 1948 /* 1949 * Do neighbor discovery. 1950 */ 1951 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1952 /* 1953 * Create a new entry in the neighbor table. 1954 */ 1955 ni = ieee80211_add_neighbor(vap, wh, &scan); 1956 } 1957 /* 1958 * Automatically peer with discovered nodes if possible. 1959 */ 1960 if (ni != vap->iv_bss && 1961 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1962 switch (ni->ni_mlstate) { 1963 case IEEE80211_NODE_MESH_IDLE: 1964 { 1965 uint16_t args[1]; 1966 1967 /* Wait for backoff callout to reset counter */ 1968 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1969 return; 1970 1971 ni->ni_mlpid = mesh_generateid(vap); 1972 if (ni->ni_mlpid == 0) 1973 return; 1974 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1975 args[0] = ni->ni_mlpid; 1976 ieee80211_send_action(ni, 1977 IEEE80211_ACTION_CAT_SELF_PROT, 1978 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1979 ni->ni_mlrcnt = 0; 1980 mesh_peer_timeout_setup(ni); 1981 break; 1982 } 1983 case IEEE80211_NODE_MESH_ESTABLISHED: 1984 { 1985 /* 1986 * Valid beacon from a peer mesh STA 1987 * bump TA lifetime 1988 */ 1989 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1990 if(rt != NULL) { 1991 ieee80211_mesh_rt_update(rt, 1992 ticks_to_msecs( 1993 ms->ms_ppath->mpp_inact)); 1994 } 1995 break; 1996 } 1997 default: 1998 break; /* ignore */ 1999 } 2000 } 2001 break; 2002 } 2003 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2004 { 2005 uint8_t *ssid, *meshid, *rates, *xrates; 2006 uint8_t *sfrm; 2007 2008 if (vap->iv_state != IEEE80211_S_RUN) { 2009 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2010 wh, NULL, "wrong state %s", 2011 ieee80211_state_name[vap->iv_state]); 2012 vap->iv_stats.is_rx_mgtdiscard++; 2013 return; 2014 } 2015 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 2016 /* frame must be directed */ 2017 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2018 wh, NULL, "%s", "not unicast"); 2019 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 2020 return; 2021 } 2022 /* 2023 * prreq frame format 2024 * [tlv] ssid 2025 * [tlv] supported rates 2026 * [tlv] extended supported rates 2027 * [tlv] mesh id 2028 */ 2029 ssid = meshid = rates = xrates = NULL; 2030 sfrm = frm; 2031 while (efrm - frm > 1) { 2032 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2033 switch (*frm) { 2034 case IEEE80211_ELEMID_SSID: 2035 ssid = frm; 2036 break; 2037 case IEEE80211_ELEMID_RATES: 2038 rates = frm; 2039 break; 2040 case IEEE80211_ELEMID_XRATES: 2041 xrates = frm; 2042 break; 2043 case IEEE80211_ELEMID_MESHID: 2044 meshid = frm; 2045 break; 2046 } 2047 frm += frm[1] + 2; 2048 } 2049 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2050 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2051 if (xrates != NULL) 2052 IEEE80211_VERIFY_ELEMENT(xrates, 2053 IEEE80211_RATE_MAXSIZE - rates[1], return); 2054 if (meshid != NULL) { 2055 IEEE80211_VERIFY_ELEMENT(meshid, 2056 IEEE80211_MESHID_LEN, return); 2057 /* NB: meshid, not ssid */ 2058 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2059 } 2060 2061 /* XXX find a better class or define it's own */ 2062 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2063 "%s", "recv probe req"); 2064 /* 2065 * Some legacy 11b clients cannot hack a complete 2066 * probe response frame. When the request includes 2067 * only a bare-bones rate set, communicate this to 2068 * the transmit side. 2069 */ 2070 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2071 break; 2072 } 2073 2074 case IEEE80211_FC0_SUBTYPE_ACTION: 2075 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2076 if (ni == vap->iv_bss) { 2077 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2078 wh, NULL, "%s", "unknown node"); 2079 vap->iv_stats.is_rx_mgtdiscard++; 2080 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2081 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2082 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2083 wh, NULL, "%s", "not for us"); 2084 vap->iv_stats.is_rx_mgtdiscard++; 2085 } else if (vap->iv_state != IEEE80211_S_RUN) { 2086 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2087 wh, NULL, "wrong state %s", 2088 ieee80211_state_name[vap->iv_state]); 2089 vap->iv_stats.is_rx_mgtdiscard++; 2090 } else { 2091 if (ieee80211_parse_action(ni, m0) == 0) 2092 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2093 } 2094 break; 2095 2096 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2097 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2098 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2099 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2100 case IEEE80211_FC0_SUBTYPE_ATIM: 2101 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2102 case IEEE80211_FC0_SUBTYPE_AUTH: 2103 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2104 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2105 wh, NULL, "%s", "not handled"); 2106 vap->iv_stats.is_rx_mgtdiscard++; 2107 break; 2108 2109 default: 2110 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2111 wh, "mgt", "subtype 0x%x not handled", subtype); 2112 vap->iv_stats.is_rx_badsubtype++; 2113 break; 2114 } 2115} 2116 2117static void 2118mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2119{ 2120 2121 switch (subtype) { 2122 case IEEE80211_FC0_SUBTYPE_BAR: 2123 ieee80211_recv_bar(ni, m); 2124 break; 2125 } 2126} 2127 2128/* 2129 * Parse meshpeering action ie's for MPM frames 2130 */ 2131static const struct ieee80211_meshpeer_ie * 2132mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2133 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2134 const uint8_t *frm, const uint8_t *efrm, 2135 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2136{ 2137 struct ieee80211vap *vap = ni->ni_vap; 2138 const struct ieee80211_meshpeer_ie *mpie; 2139 uint16_t args[3]; 2140 const uint8_t *meshid, *meshconf, *meshpeer; 2141 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2142 2143 meshid = meshconf = meshpeer = NULL; 2144 while (efrm - frm > 1) { 2145 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2146 switch (*frm) { 2147 case IEEE80211_ELEMID_MESHID: 2148 meshid = frm; 2149 break; 2150 case IEEE80211_ELEMID_MESHCONF: 2151 meshconf = frm; 2152 break; 2153 case IEEE80211_ELEMID_MESHPEER: 2154 meshpeer = frm; 2155 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2156 memset(mp, 0, sizeof(*mp)); 2157 mp->peer_len = mpie->peer_len; 2158 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 2159 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 2160 switch (subtype) { 2161 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2162 mp->peer_linkid = 2163 LE_READ_2(&mpie->peer_linkid); 2164 break; 2165 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2166 /* NB: peer link ID is optional */ 2167 if (mpie->peer_len == 2168 (IEEE80211_MPM_BASE_SZ + 2)) { 2169 mp->peer_linkid = 0; 2170 mp->peer_rcode = 2171 LE_READ_2(&mpie->peer_linkid); 2172 } else { 2173 mp->peer_linkid = 2174 LE_READ_2(&mpie->peer_linkid); 2175 mp->peer_rcode = 2176 LE_READ_2(&mpie->peer_rcode); 2177 } 2178 break; 2179 } 2180 break; 2181 } 2182 frm += frm[1] + 2; 2183 } 2184 2185 /* 2186 * Verify the contents of the frame. 2187 * If it fails validation, close the peer link. 2188 */ 2189 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2190 sendclose = 1; 2191 IEEE80211_DISCARD(vap, 2192 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2193 wh, NULL, "%s", "MPM validation failed"); 2194 } 2195 2196 /* If meshid is not the same reject any frames type. */ 2197 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2198 sendclose = 1; 2199 IEEE80211_DISCARD(vap, 2200 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2201 wh, NULL, "%s", "not for our mesh"); 2202 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2203 /* 2204 * Standard not clear about this, if we dont ignore 2205 * there will be an endless loop between nodes sending 2206 * CLOSE frames between each other with wrong meshid. 2207 * Discard and timers will bring FSM to IDLE state. 2208 */ 2209 return NULL; 2210 } 2211 } 2212 2213 /* 2214 * Close frames are accepted if meshid is the same. 2215 * Verify the other two types. 2216 */ 2217 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2218 mesh_verify_meshconf(vap, meshconf)) { 2219 sendclose = 1; 2220 IEEE80211_DISCARD(vap, 2221 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2222 wh, NULL, "%s", "configuration missmatch"); 2223 } 2224 2225 if (sendclose) { 2226 vap->iv_stats.is_rx_mgtdiscard++; 2227 switch (ni->ni_mlstate) { 2228 case IEEE80211_NODE_MESH_IDLE: 2229 case IEEE80211_NODE_MESH_ESTABLISHED: 2230 case IEEE80211_NODE_MESH_HOLDING: 2231 /* ignore */ 2232 break; 2233 case IEEE80211_NODE_MESH_OPENSNT: 2234 case IEEE80211_NODE_MESH_OPENRCV: 2235 case IEEE80211_NODE_MESH_CONFIRMRCV: 2236 args[0] = ni->ni_mlpid; 2237 args[1] = ni->ni_mllid; 2238 /* Reason codes for rejection */ 2239 switch (subtype) { 2240 case IEEE80211_ACTION_MESHPEERING_OPEN: 2241 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2242 break; 2243 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2244 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2245 break; 2246 } 2247 ieee80211_send_action(ni, 2248 IEEE80211_ACTION_CAT_SELF_PROT, 2249 IEEE80211_ACTION_MESHPEERING_CLOSE, 2250 args); 2251 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2252 mesh_peer_timeout_setup(ni); 2253 break; 2254 } 2255 return NULL; 2256 } 2257 2258 return (const struct ieee80211_meshpeer_ie *) mp; 2259} 2260 2261static int 2262mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2263 const struct ieee80211_frame *wh, 2264 const uint8_t *frm, const uint8_t *efrm) 2265{ 2266 struct ieee80211vap *vap = ni->ni_vap; 2267 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2268 struct ieee80211_meshpeer_ie ie; 2269 const struct ieee80211_meshpeer_ie *meshpeer; 2270 uint16_t args[3]; 2271 2272 /* +2+2 for action + code + capabilites */ 2273 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2274 IEEE80211_ACTION_MESHPEERING_OPEN); 2275 if (meshpeer == NULL) { 2276 return 0; 2277 } 2278 2279 /* XXX move up */ 2280 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2281 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2282 2283 switch (ni->ni_mlstate) { 2284 case IEEE80211_NODE_MESH_IDLE: 2285 /* Reject open request if reached our maximum neighbor count */ 2286 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2287 args[0] = meshpeer->peer_llinkid; 2288 args[1] = 0; 2289 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2290 ieee80211_send_action(ni, 2291 IEEE80211_ACTION_CAT_SELF_PROT, 2292 IEEE80211_ACTION_MESHPEERING_CLOSE, 2293 args); 2294 /* stay in IDLE state */ 2295 return (0); 2296 } 2297 /* Open frame accepted */ 2298 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2299 ni->ni_mllid = meshpeer->peer_llinkid; 2300 ni->ni_mlpid = mesh_generateid(vap); 2301 if (ni->ni_mlpid == 0) 2302 return 0; /* XXX */ 2303 args[0] = ni->ni_mlpid; 2304 /* Announce we're open too... */ 2305 ieee80211_send_action(ni, 2306 IEEE80211_ACTION_CAT_SELF_PROT, 2307 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2308 /* ...and confirm the link. */ 2309 args[0] = ni->ni_mlpid; 2310 args[1] = ni->ni_mllid; 2311 ieee80211_send_action(ni, 2312 IEEE80211_ACTION_CAT_SELF_PROT, 2313 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2314 args); 2315 mesh_peer_timeout_setup(ni); 2316 break; 2317 case IEEE80211_NODE_MESH_OPENRCV: 2318 /* Wrong Link ID */ 2319 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2320 args[0] = ni->ni_mllid; 2321 args[1] = ni->ni_mlpid; 2322 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2323 ieee80211_send_action(ni, 2324 IEEE80211_ACTION_CAT_SELF_PROT, 2325 IEEE80211_ACTION_MESHPEERING_CLOSE, 2326 args); 2327 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2328 mesh_peer_timeout_setup(ni); 2329 break; 2330 } 2331 /* Duplicate open, confirm again. */ 2332 args[0] = ni->ni_mlpid; 2333 args[1] = ni->ni_mllid; 2334 ieee80211_send_action(ni, 2335 IEEE80211_ACTION_CAT_SELF_PROT, 2336 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2337 args); 2338 break; 2339 case IEEE80211_NODE_MESH_OPENSNT: 2340 ni->ni_mllid = meshpeer->peer_llinkid; 2341 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2342 args[0] = ni->ni_mlpid; 2343 args[1] = ni->ni_mllid; 2344 ieee80211_send_action(ni, 2345 IEEE80211_ACTION_CAT_SELF_PROT, 2346 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2347 args); 2348 /* NB: don't setup/clear any timeout */ 2349 break; 2350 case IEEE80211_NODE_MESH_CONFIRMRCV: 2351 if (ni->ni_mlpid != meshpeer->peer_linkid || 2352 ni->ni_mllid != meshpeer->peer_llinkid) { 2353 args[0] = ni->ni_mlpid; 2354 args[1] = ni->ni_mllid; 2355 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2356 ieee80211_send_action(ni, 2357 IEEE80211_ACTION_CAT_SELF_PROT, 2358 IEEE80211_ACTION_MESHPEERING_CLOSE, 2359 args); 2360 mesh_linkchange(ni, 2361 IEEE80211_NODE_MESH_HOLDING); 2362 mesh_peer_timeout_setup(ni); 2363 break; 2364 } 2365 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2366 ni->ni_mllid = meshpeer->peer_llinkid; 2367 args[0] = ni->ni_mlpid; 2368 args[1] = ni->ni_mllid; 2369 ieee80211_send_action(ni, 2370 IEEE80211_ACTION_CAT_SELF_PROT, 2371 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2372 args); 2373 mesh_peer_timeout_stop(ni); 2374 break; 2375 case IEEE80211_NODE_MESH_ESTABLISHED: 2376 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2377 args[0] = ni->ni_mllid; 2378 args[1] = ni->ni_mlpid; 2379 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2380 ieee80211_send_action(ni, 2381 IEEE80211_ACTION_CAT_SELF_PROT, 2382 IEEE80211_ACTION_MESHPEERING_CLOSE, 2383 args); 2384 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2385 mesh_peer_timeout_setup(ni); 2386 break; 2387 } 2388 args[0] = ni->ni_mlpid; 2389 args[1] = ni->ni_mllid; 2390 ieee80211_send_action(ni, 2391 IEEE80211_ACTION_CAT_SELF_PROT, 2392 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2393 args); 2394 break; 2395 case IEEE80211_NODE_MESH_HOLDING: 2396 args[0] = ni->ni_mlpid; 2397 args[1] = meshpeer->peer_llinkid; 2398 /* Standard not clear about what the reaason code should be */ 2399 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2400 ieee80211_send_action(ni, 2401 IEEE80211_ACTION_CAT_SELF_PROT, 2402 IEEE80211_ACTION_MESHPEERING_CLOSE, 2403 args); 2404 break; 2405 } 2406 return 0; 2407} 2408 2409static int 2410mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2411 const struct ieee80211_frame *wh, 2412 const uint8_t *frm, const uint8_t *efrm) 2413{ 2414 struct ieee80211vap *vap = ni->ni_vap; 2415 struct ieee80211_meshpeer_ie ie; 2416 const struct ieee80211_meshpeer_ie *meshpeer; 2417 uint16_t args[3]; 2418 2419 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2420 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2421 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2422 if (meshpeer == NULL) { 2423 return 0; 2424 } 2425 2426 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2427 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2428 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2429 2430 switch (ni->ni_mlstate) { 2431 case IEEE80211_NODE_MESH_OPENRCV: 2432 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2433 mesh_peer_timeout_stop(ni); 2434 break; 2435 case IEEE80211_NODE_MESH_OPENSNT: 2436 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2437 mesh_peer_timeout_setup(ni); 2438 break; 2439 case IEEE80211_NODE_MESH_HOLDING: 2440 args[0] = ni->ni_mlpid; 2441 args[1] = meshpeer->peer_llinkid; 2442 /* Standard not clear about what the reaason code should be */ 2443 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2444 ieee80211_send_action(ni, 2445 IEEE80211_ACTION_CAT_SELF_PROT, 2446 IEEE80211_ACTION_MESHPEERING_CLOSE, 2447 args); 2448 break; 2449 case IEEE80211_NODE_MESH_CONFIRMRCV: 2450 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2451 args[0] = ni->ni_mlpid; 2452 args[1] = ni->ni_mllid; 2453 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2454 ieee80211_send_action(ni, 2455 IEEE80211_ACTION_CAT_SELF_PROT, 2456 IEEE80211_ACTION_MESHPEERING_CLOSE, 2457 args); 2458 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2459 mesh_peer_timeout_setup(ni); 2460 } 2461 break; 2462 default: 2463 IEEE80211_DISCARD(vap, 2464 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2465 wh, NULL, "received confirm in invalid state %d", 2466 ni->ni_mlstate); 2467 vap->iv_stats.is_rx_mgtdiscard++; 2468 break; 2469 } 2470 return 0; 2471} 2472 2473static int 2474mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2475 const struct ieee80211_frame *wh, 2476 const uint8_t *frm, const uint8_t *efrm) 2477{ 2478 struct ieee80211_meshpeer_ie ie; 2479 const struct ieee80211_meshpeer_ie *meshpeer; 2480 uint16_t args[3]; 2481 2482 /* +2 for action + code */ 2483 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2484 IEEE80211_ACTION_MESHPEERING_CLOSE); 2485 if (meshpeer == NULL) { 2486 return 0; 2487 } 2488 2489 /* 2490 * XXX: check reason code, for example we could receive 2491 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2492 * to peer again. 2493 */ 2494 2495 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2496 ni, "%s", "recv PEER CLOSE"); 2497 2498 switch (ni->ni_mlstate) { 2499 case IEEE80211_NODE_MESH_IDLE: 2500 /* ignore */ 2501 break; 2502 case IEEE80211_NODE_MESH_OPENRCV: 2503 case IEEE80211_NODE_MESH_OPENSNT: 2504 case IEEE80211_NODE_MESH_CONFIRMRCV: 2505 case IEEE80211_NODE_MESH_ESTABLISHED: 2506 args[0] = ni->ni_mlpid; 2507 args[1] = ni->ni_mllid; 2508 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2509 ieee80211_send_action(ni, 2510 IEEE80211_ACTION_CAT_SELF_PROT, 2511 IEEE80211_ACTION_MESHPEERING_CLOSE, 2512 args); 2513 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2514 mesh_peer_timeout_setup(ni); 2515 break; 2516 case IEEE80211_NODE_MESH_HOLDING: 2517 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2518 mesh_peer_timeout_stop(ni); 2519 break; 2520 } 2521 return 0; 2522} 2523 2524/* 2525 * Link Metric handling. 2526 */ 2527static int 2528mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2529 const struct ieee80211_frame *wh, 2530 const uint8_t *frm, const uint8_t *efrm) 2531{ 2532 const struct ieee80211_meshlmetric_ie *ie = 2533 (const struct ieee80211_meshlmetric_ie *) 2534 (frm+2); /* action + code */ 2535 struct ieee80211_meshlmetric_ie lm_rep; 2536 2537 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2538 lm_rep.lm_flags = 0; 2539 lm_rep.lm_metric = mesh_airtime_calc(ni); 2540 ieee80211_send_action(ni, 2541 IEEE80211_ACTION_CAT_MESH, 2542 IEEE80211_ACTION_MESH_LMETRIC, 2543 &lm_rep); 2544 } 2545 /* XXX: else do nothing for now */ 2546 return 0; 2547} 2548 2549/* 2550 * Parse meshgate action ie's for GANN frames. 2551 * Returns -1 if parsing fails, otherwise 0. 2552 */ 2553static int 2554mesh_parse_meshgate_action(struct ieee80211_node *ni, 2555 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2556 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2557{ 2558 struct ieee80211vap *vap = ni->ni_vap; 2559 const struct ieee80211_meshgann_ie *gannie; 2560 2561 while (efrm - frm > 1) { 2562 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2563 switch (*frm) { 2564 case IEEE80211_ELEMID_MESHGANN: 2565 gannie = (const struct ieee80211_meshgann_ie *) frm; 2566 memset(ie, 0, sizeof(*ie)); 2567 ie->gann_ie = gannie->gann_ie; 2568 ie->gann_len = gannie->gann_len; 2569 ie->gann_flags = gannie->gann_flags; 2570 ie->gann_hopcount = gannie->gann_hopcount; 2571 ie->gann_ttl = gannie->gann_ttl; 2572 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2573 ie->gann_seq = LE_READ_4(&gannie->gann_seq); 2574 ie->gann_interval = LE_READ_2(&gannie->gann_interval); 2575 break; 2576 } 2577 frm += frm[1] + 2; 2578 } 2579 2580 return 0; 2581} 2582 2583/* 2584 * Mesh Gate Announcement handling. 2585 */ 2586static int 2587mesh_recv_action_meshgate(struct ieee80211_node *ni, 2588 const struct ieee80211_frame *wh, 2589 const uint8_t *frm, const uint8_t *efrm) 2590{ 2591 struct ieee80211vap *vap = ni->ni_vap; 2592 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2593 struct ieee80211_mesh_gate_route *gr, *next; 2594 struct ieee80211_mesh_route *rt_gate; 2595 struct ieee80211_meshgann_ie pgann; 2596 struct ieee80211_meshgann_ie ie; 2597 int found = 0; 2598 2599 /* +2 for action + code */ 2600 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2601 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2602 ni->ni_macaddr, NULL, "%s", 2603 "GANN parsing failed"); 2604 vap->iv_stats.is_rx_mgtdiscard++; 2605 return (0); 2606 } 2607 2608 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2609 return 0; 2610 2611 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2612 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2613 ie.gann_seq); 2614 2615 if (ms == NULL) 2616 return (0); 2617 MESH_RT_LOCK(ms); 2618 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2619 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2620 continue; 2621 if (ie.gann_seq <= gr->gr_lastseq) { 2622 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2623 ni->ni_macaddr, NULL, 2624 "GANN old seqno %u <= %u", 2625 ie.gann_seq, gr->gr_lastseq); 2626 MESH_RT_UNLOCK(ms); 2627 return (0); 2628 } 2629 /* corresponding mesh gate found & GANN accepted */ 2630 found = 1; 2631 break; 2632 2633 } 2634 if (found == 0) { 2635 /* this GANN is from a new mesh Gate add it to known table. */ 2636 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2637 "stored new GANN information, seq %u.", ie.gann_seq); 2638 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2639 M_80211_MESH_GT_RT, 2640 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2641 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2642 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2643 } 2644 gr->gr_lastseq = ie.gann_seq; 2645 2646 /* check if we have a path to this gate */ 2647 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2648 if (rt_gate != NULL && 2649 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2650 gr->gr_route = rt_gate; 2651 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2652 } 2653 2654 MESH_RT_UNLOCK(ms); 2655 2656 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2657 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2658 return 0; 2659 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2660 pgann.gann_hopcount = ie.gann_hopcount + 1; 2661 pgann.gann_ttl = ie.gann_ttl - 1; 2662 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2663 pgann.gann_seq = ie.gann_seq; 2664 pgann.gann_interval = ie.gann_interval; 2665 2666 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2667 "%s", "propagate GANN"); 2668 2669 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2670 IEEE80211_ACTION_MESH_GANN, &pgann); 2671 2672 return 0; 2673} 2674 2675static int 2676mesh_send_action(struct ieee80211_node *ni, 2677 const uint8_t sa[IEEE80211_ADDR_LEN], 2678 const uint8_t da[IEEE80211_ADDR_LEN], 2679 struct mbuf *m) 2680{ 2681 struct ieee80211vap *vap = ni->ni_vap; 2682 struct ieee80211com *ic = ni->ni_ic; 2683 struct ieee80211_bpf_params params; 2684 struct ieee80211_frame *wh; 2685 int ret; 2686 2687 KASSERT(ni != NULL, ("null node")); 2688 2689 if (vap->iv_state == IEEE80211_S_CAC) { 2690 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2691 "block %s frame in CAC state", "Mesh action"); 2692 vap->iv_stats.is_tx_badstate++; 2693 ieee80211_free_node(ni); 2694 m_freem(m); 2695 return EIO; /* XXX */ 2696 } 2697 2698 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2699 if (m == NULL) { 2700 ieee80211_free_node(ni); 2701 return ENOMEM; 2702 } 2703 2704 IEEE80211_TX_LOCK(ic); 2705 wh = mtod(m, struct ieee80211_frame *); 2706 ieee80211_send_setup(ni, m, 2707 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2708 IEEE80211_NONQOS_TID, sa, da, sa); 2709 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2710 2711 memset(¶ms, 0, sizeof(params)); 2712 params.ibp_pri = WME_AC_VO; 2713 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2714 if (IEEE80211_IS_MULTICAST(da)) 2715 params.ibp_try0 = 1; 2716 else 2717 params.ibp_try0 = ni->ni_txparms->maxretry; 2718 params.ibp_power = ni->ni_txpower; 2719 2720 IEEE80211_NODE_STAT(ni, tx_mgmt); 2721 2722 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2723 IEEE80211_TX_UNLOCK(ic); 2724 return (ret); 2725} 2726 2727#define ADDSHORT(frm, v) do { \ 2728 frm[0] = (v) & 0xff; \ 2729 frm[1] = (v) >> 8; \ 2730 frm += 2; \ 2731} while (0) 2732#define ADDWORD(frm, v) do { \ 2733 frm[0] = (v) & 0xff; \ 2734 frm[1] = ((v) >> 8) & 0xff; \ 2735 frm[2] = ((v) >> 16) & 0xff; \ 2736 frm[3] = ((v) >> 24) & 0xff; \ 2737 frm += 4; \ 2738} while (0) 2739 2740static int 2741mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2742 int category, int action, void *args0) 2743{ 2744 struct ieee80211vap *vap = ni->ni_vap; 2745 struct ieee80211com *ic = ni->ni_ic; 2746 uint16_t *args = args0; 2747 const struct ieee80211_rateset *rs; 2748 struct mbuf *m; 2749 uint8_t *frm; 2750 2751 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2752 "send PEER OPEN action: localid 0x%x", args[0]); 2753 2754 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2755 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2756 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2757 ieee80211_ref_node(ni); 2758 2759 m = ieee80211_getmgtframe(&frm, 2760 ic->ic_headroom + sizeof(struct ieee80211_frame), 2761 sizeof(uint16_t) /* action+category */ 2762 + sizeof(uint16_t) /* capabilites */ 2763 + 2 + IEEE80211_RATE_SIZE 2764 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2765 + 2 + IEEE80211_MESHID_LEN 2766 + sizeof(struct ieee80211_meshconf_ie) 2767 + sizeof(struct ieee80211_meshpeer_ie) 2768 ); 2769 if (m != NULL) { 2770 /* 2771 * mesh peer open action frame format: 2772 * [1] category 2773 * [1] action 2774 * [2] capabilities 2775 * [tlv] rates 2776 * [tlv] xrates 2777 * [tlv] mesh id 2778 * [tlv] mesh conf 2779 * [tlv] mesh peer link mgmt 2780 */ 2781 *frm++ = category; 2782 *frm++ = action; 2783 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2784 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2785 frm = ieee80211_add_rates(frm, rs); 2786 frm = ieee80211_add_xrates(frm, rs); 2787 frm = ieee80211_add_meshid(frm, vap); 2788 frm = ieee80211_add_meshconf(frm, vap); 2789 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2790 args[0], 0, 0); 2791 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2792 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2793 } else { 2794 vap->iv_stats.is_tx_nobuf++; 2795 ieee80211_free_node(ni); 2796 return ENOMEM; 2797 } 2798} 2799 2800static int 2801mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2802 int category, int action, void *args0) 2803{ 2804 struct ieee80211vap *vap = ni->ni_vap; 2805 struct ieee80211com *ic = ni->ni_ic; 2806 uint16_t *args = args0; 2807 const struct ieee80211_rateset *rs; 2808 struct mbuf *m; 2809 uint8_t *frm; 2810 2811 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2812 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2813 args[0], args[1]); 2814 2815 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2816 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2817 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2818 ieee80211_ref_node(ni); 2819 2820 m = ieee80211_getmgtframe(&frm, 2821 ic->ic_headroom + sizeof(struct ieee80211_frame), 2822 sizeof(uint16_t) /* action+category */ 2823 + sizeof(uint16_t) /* capabilites */ 2824 + sizeof(uint16_t) /* status code */ 2825 + sizeof(uint16_t) /* AID */ 2826 + 2 + IEEE80211_RATE_SIZE 2827 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2828 + 2 + IEEE80211_MESHID_LEN 2829 + sizeof(struct ieee80211_meshconf_ie) 2830 + sizeof(struct ieee80211_meshpeer_ie) 2831 ); 2832 if (m != NULL) { 2833 /* 2834 * mesh peer confirm action frame format: 2835 * [1] category 2836 * [1] action 2837 * [2] capabilities 2838 * [2] status code 2839 * [2] association id (peer ID) 2840 * [tlv] rates 2841 * [tlv] xrates 2842 * [tlv] mesh id 2843 * [tlv] mesh conf 2844 * [tlv] mesh peer link mgmt 2845 */ 2846 *frm++ = category; 2847 *frm++ = action; 2848 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2849 ADDSHORT(frm, 0); /* status code */ 2850 ADDSHORT(frm, args[1]); /* AID */ 2851 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2852 frm = ieee80211_add_rates(frm, rs); 2853 frm = ieee80211_add_xrates(frm, rs); 2854 frm = ieee80211_add_meshid(frm, vap); 2855 frm = ieee80211_add_meshconf(frm, vap); 2856 frm = ieee80211_add_meshpeer(frm, 2857 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2858 args[0], args[1], 0); 2859 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2860 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2861 } else { 2862 vap->iv_stats.is_tx_nobuf++; 2863 ieee80211_free_node(ni); 2864 return ENOMEM; 2865 } 2866} 2867 2868static int 2869mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2870 int category, int action, void *args0) 2871{ 2872 struct ieee80211vap *vap = ni->ni_vap; 2873 struct ieee80211com *ic = ni->ni_ic; 2874 uint16_t *args = args0; 2875 struct mbuf *m; 2876 uint8_t *frm; 2877 2878 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2879 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2880 args[0], args[1], args[2]); 2881 2882 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2883 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2884 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2885 ieee80211_ref_node(ni); 2886 2887 m = ieee80211_getmgtframe(&frm, 2888 ic->ic_headroom + sizeof(struct ieee80211_frame), 2889 sizeof(uint16_t) /* action+category */ 2890 + sizeof(uint16_t) /* reason code */ 2891 + 2 + IEEE80211_MESHID_LEN 2892 + sizeof(struct ieee80211_meshpeer_ie) 2893 ); 2894 if (m != NULL) { 2895 /* 2896 * mesh peer close action frame format: 2897 * [1] category 2898 * [1] action 2899 * [tlv] mesh id 2900 * [tlv] mesh peer link mgmt 2901 */ 2902 *frm++ = category; 2903 *frm++ = action; 2904 frm = ieee80211_add_meshid(frm, vap); 2905 frm = ieee80211_add_meshpeer(frm, 2906 IEEE80211_ACTION_MESHPEERING_CLOSE, 2907 args[0], args[1], args[2]); 2908 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2909 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2910 } else { 2911 vap->iv_stats.is_tx_nobuf++; 2912 ieee80211_free_node(ni); 2913 return ENOMEM; 2914 } 2915} 2916 2917static int 2918mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2919 int category, int action, void *arg0) 2920{ 2921 struct ieee80211vap *vap = ni->ni_vap; 2922 struct ieee80211com *ic = ni->ni_ic; 2923 struct ieee80211_meshlmetric_ie *ie = arg0; 2924 struct mbuf *m; 2925 uint8_t *frm; 2926 2927 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2928 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2929 ni, "%s", "send LINK METRIC REQUEST action"); 2930 } else { 2931 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2932 ni, "send LINK METRIC REPLY action: metric 0x%x", 2933 ie->lm_metric); 2934 } 2935 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2936 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2937 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2938 ieee80211_ref_node(ni); 2939 2940 m = ieee80211_getmgtframe(&frm, 2941 ic->ic_headroom + sizeof(struct ieee80211_frame), 2942 sizeof(uint16_t) + /* action+category */ 2943 sizeof(struct ieee80211_meshlmetric_ie) 2944 ); 2945 if (m != NULL) { 2946 /* 2947 * mesh link metric 2948 * [1] category 2949 * [1] action 2950 * [tlv] mesh link metric 2951 */ 2952 *frm++ = category; 2953 *frm++ = action; 2954 frm = ieee80211_add_meshlmetric(frm, 2955 ie->lm_flags, ie->lm_metric); 2956 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2957 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2958 } else { 2959 vap->iv_stats.is_tx_nobuf++; 2960 ieee80211_free_node(ni); 2961 return ENOMEM; 2962 } 2963} 2964 2965static int 2966mesh_send_action_meshgate(struct ieee80211_node *ni, 2967 int category, int action, void *arg0) 2968{ 2969 struct ieee80211vap *vap = ni->ni_vap; 2970 struct ieee80211com *ic = ni->ni_ic; 2971 struct ieee80211_meshgann_ie *ie = arg0; 2972 struct mbuf *m; 2973 uint8_t *frm; 2974 2975 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2976 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2977 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2978 ieee80211_ref_node(ni); 2979 2980 m = ieee80211_getmgtframe(&frm, 2981 ic->ic_headroom + sizeof(struct ieee80211_frame), 2982 sizeof(uint16_t) + /* action+category */ 2983 IEEE80211_MESHGANN_BASE_SZ 2984 ); 2985 if (m != NULL) { 2986 /* 2987 * mesh link metric 2988 * [1] category 2989 * [1] action 2990 * [tlv] mesh gate annoucement 2991 */ 2992 *frm++ = category; 2993 *frm++ = action; 2994 frm = ieee80211_add_meshgate(frm, ie); 2995 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2996 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 2997 } else { 2998 vap->iv_stats.is_tx_nobuf++; 2999 ieee80211_free_node(ni); 3000 return ENOMEM; 3001 } 3002} 3003 3004static void 3005mesh_peer_timeout_setup(struct ieee80211_node *ni) 3006{ 3007 switch (ni->ni_mlstate) { 3008 case IEEE80211_NODE_MESH_HOLDING: 3009 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 3010 break; 3011 case IEEE80211_NODE_MESH_CONFIRMRCV: 3012 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 3013 break; 3014 case IEEE80211_NODE_MESH_IDLE: 3015 ni->ni_mltval = 0; 3016 break; 3017 default: 3018 ni->ni_mltval = ieee80211_mesh_retrytimeout; 3019 break; 3020 } 3021 if (ni->ni_mltval) 3022 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 3023 mesh_peer_timeout_cb, ni); 3024} 3025 3026/* 3027 * Same as above but backoffs timer statisically 50%. 3028 */ 3029static void 3030mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3031{ 3032 uint32_t r; 3033 3034 r = arc4random(); 3035 ni->ni_mltval += r % ni->ni_mltval; 3036 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3037 ni); 3038} 3039 3040static __inline void 3041mesh_peer_timeout_stop(struct ieee80211_node *ni) 3042{ 3043 callout_drain(&ni->ni_mltimer); 3044} 3045 3046static void 3047mesh_peer_backoff_cb(void *arg) 3048{ 3049 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3050 3051 /* After backoff timeout, try to peer automatically again. */ 3052 ni->ni_mlhcnt = 0; 3053} 3054 3055/* 3056 * Mesh Peer Link Management FSM timeout handling. 3057 */ 3058static void 3059mesh_peer_timeout_cb(void *arg) 3060{ 3061 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3062 uint16_t args[3]; 3063 3064 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3065 ni, "mesh link timeout, state %d, retry counter %d", 3066 ni->ni_mlstate, ni->ni_mlrcnt); 3067 3068 switch (ni->ni_mlstate) { 3069 case IEEE80211_NODE_MESH_IDLE: 3070 case IEEE80211_NODE_MESH_ESTABLISHED: 3071 break; 3072 case IEEE80211_NODE_MESH_OPENSNT: 3073 case IEEE80211_NODE_MESH_OPENRCV: 3074 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3075 args[0] = ni->ni_mlpid; 3076 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3077 ieee80211_send_action(ni, 3078 IEEE80211_ACTION_CAT_SELF_PROT, 3079 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3080 ni->ni_mlrcnt = 0; 3081 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3082 mesh_peer_timeout_setup(ni); 3083 } else { 3084 args[0] = ni->ni_mlpid; 3085 ieee80211_send_action(ni, 3086 IEEE80211_ACTION_CAT_SELF_PROT, 3087 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3088 ni->ni_mlrcnt++; 3089 mesh_peer_timeout_backoff(ni); 3090 } 3091 break; 3092 case IEEE80211_NODE_MESH_CONFIRMRCV: 3093 args[0] = ni->ni_mlpid; 3094 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3095 ieee80211_send_action(ni, 3096 IEEE80211_ACTION_CAT_SELF_PROT, 3097 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3098 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3099 mesh_peer_timeout_setup(ni); 3100 break; 3101 case IEEE80211_NODE_MESH_HOLDING: 3102 ni->ni_mlhcnt++; 3103 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3104 callout_reset(&ni->ni_mlhtimer, 3105 ieee80211_mesh_backofftimeout, 3106 mesh_peer_backoff_cb, ni); 3107 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3108 break; 3109 } 3110} 3111 3112static int 3113mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3114{ 3115 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3116 3117 if (ie == NULL || ie[1] != ms->ms_idlen) 3118 return 1; 3119 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3120} 3121 3122/* 3123 * Check if we are using the same algorithms for this mesh. 3124 */ 3125static int 3126mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3127{ 3128 const struct ieee80211_meshconf_ie *meshconf = 3129 (const struct ieee80211_meshconf_ie *) ie; 3130 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3131 3132 if (meshconf == NULL) 3133 return 1; 3134 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3135 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3136 "unknown path selection algorithm: 0x%x\n", 3137 meshconf->conf_pselid); 3138 return 1; 3139 } 3140 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3141 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3142 "unknown path metric algorithm: 0x%x\n", 3143 meshconf->conf_pmetid); 3144 return 1; 3145 } 3146 if (meshconf->conf_ccid != 0) { 3147 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3148 "unknown congestion control algorithm: 0x%x\n", 3149 meshconf->conf_ccid); 3150 return 1; 3151 } 3152 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3153 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3154 "unknown sync algorithm: 0x%x\n", 3155 meshconf->conf_syncid); 3156 return 1; 3157 } 3158 if (meshconf->conf_authid != 0) { 3159 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3160 "unknown auth auth algorithm: 0x%x\n", 3161 meshconf->conf_pselid); 3162 return 1; 3163 } 3164 /* Not accepting peers */ 3165 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3166 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3167 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3168 return 1; 3169 } 3170 return 0; 3171} 3172 3173static int 3174mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3175 const uint8_t *ie) 3176{ 3177 const struct ieee80211_meshpeer_ie *meshpeer = 3178 (const struct ieee80211_meshpeer_ie *) ie; 3179 3180 if (meshpeer == NULL || 3181 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3182 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3183 return 1; 3184 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3185 IEEE80211_DPRINTF(vap, 3186 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3187 "Only MPM protocol is supported (proto: 0x%02X)", 3188 meshpeer->peer_proto); 3189 return 1; 3190 } 3191 switch (subtype) { 3192 case IEEE80211_ACTION_MESHPEERING_OPEN: 3193 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3194 return 1; 3195 break; 3196 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3197 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3198 return 1; 3199 break; 3200 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3201 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3202 return 1; 3203 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3204 meshpeer->peer_linkid != 0) 3205 return 1; 3206 if (meshpeer->peer_rcode == 0) 3207 return 1; 3208 break; 3209 } 3210 return 0; 3211} 3212 3213/* 3214 * Add a Mesh ID IE to a frame. 3215 */ 3216uint8_t * 3217ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3218{ 3219 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3220 3221 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3222 3223 *frm++ = IEEE80211_ELEMID_MESHID; 3224 *frm++ = ms->ms_idlen; 3225 memcpy(frm, ms->ms_id, ms->ms_idlen); 3226 return frm + ms->ms_idlen; 3227} 3228 3229/* 3230 * Add a Mesh Configuration IE to a frame. 3231 * For now just use HWMP routing, Airtime link metric, Null Congestion 3232 * Signaling, Null Sync Protocol and Null Authentication. 3233 */ 3234uint8_t * 3235ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3236{ 3237 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3238 uint16_t caps; 3239 3240 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3241 3242 *frm++ = IEEE80211_ELEMID_MESHCONF; 3243 *frm++ = IEEE80211_MESH_CONF_SZ; 3244 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3245 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3246 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3247 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3248 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3249 /* NB: set the number of neighbors before the rest */ 3250 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3251 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3252 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3253 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3254 frm += 1; 3255 caps = 0; 3256 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3257 caps |= IEEE80211_MESHCONF_CAP_AP; 3258 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3259 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3260 *frm++ = caps; 3261 return frm; 3262} 3263 3264/* 3265 * Add a Mesh Peer Management IE to a frame. 3266 */ 3267uint8_t * 3268ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3269 uint16_t peerid, uint16_t reason) 3270{ 3271 3272 KASSERT(localid != 0, ("localid == 0")); 3273 3274 *frm++ = IEEE80211_ELEMID_MESHPEER; 3275 switch (subtype) { 3276 case IEEE80211_ACTION_MESHPEERING_OPEN: 3277 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3278 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3279 ADDSHORT(frm, localid); /* local ID */ 3280 break; 3281 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3282 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3283 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3284 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3285 ADDSHORT(frm, localid); /* local ID */ 3286 ADDSHORT(frm, peerid); /* peer ID */ 3287 break; 3288 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3289 if (peerid) 3290 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3291 else 3292 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3293 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3294 ADDSHORT(frm, localid); /* local ID */ 3295 if (peerid) 3296 ADDSHORT(frm, peerid); /* peer ID */ 3297 ADDSHORT(frm, reason); 3298 break; 3299 } 3300 return frm; 3301} 3302 3303/* 3304 * Compute an Airtime Link Metric for the link with this node. 3305 * 3306 * Based on Draft 3.0 spec (11B.10, p.149). 3307 */ 3308/* 3309 * Max 802.11s overhead. 3310 */ 3311#define IEEE80211_MESH_MAXOVERHEAD \ 3312 (sizeof(struct ieee80211_qosframe_addr4) \ 3313 + sizeof(struct ieee80211_meshcntl_ae10) \ 3314 + sizeof(struct llc) \ 3315 + IEEE80211_ADDR_LEN \ 3316 + IEEE80211_WEP_IVLEN \ 3317 + IEEE80211_WEP_KIDLEN \ 3318 + IEEE80211_WEP_CRCLEN \ 3319 + IEEE80211_WEP_MICLEN \ 3320 + IEEE80211_CRC_LEN) 3321uint32_t 3322mesh_airtime_calc(struct ieee80211_node *ni) 3323{ 3324#define M_BITS 8 3325#define S_FACTOR (2 * M_BITS) 3326 struct ieee80211com *ic = ni->ni_ic; 3327 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3328 const static int nbits = 8192 << M_BITS; 3329 uint32_t overhead, rate, errrate; 3330 uint64_t res; 3331 3332 /* Time to transmit a frame */ 3333 rate = ni->ni_txrate; 3334 overhead = ieee80211_compute_duration(ic->ic_rt, 3335 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3336 /* Error rate in percentage */ 3337 /* XXX assuming small failures are ok */ 3338 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + 3339 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) 3340 / 100; 3341 res = (overhead + (nbits / rate)) * 3342 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3343 3344 return (uint32_t)(res >> S_FACTOR); 3345#undef M_BITS 3346#undef S_FACTOR 3347} 3348 3349/* 3350 * Add a Mesh Link Metric report IE to a frame. 3351 */ 3352uint8_t * 3353ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3354{ 3355 *frm++ = IEEE80211_ELEMID_MESHLINK; 3356 *frm++ = 5; 3357 *frm++ = flags; 3358 ADDWORD(frm, metric); 3359 return frm; 3360} 3361 3362/* 3363 * Add a Mesh Gate Announcement IE to a frame. 3364 */ 3365uint8_t * 3366ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3367{ 3368 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3369 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3370 *frm++ = ie->gann_flags; 3371 *frm++ = ie->gann_hopcount; 3372 *frm++ = ie->gann_ttl; 3373 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3374 frm += 6; 3375 ADDWORD(frm, ie->gann_seq); 3376 ADDSHORT(frm, ie->gann_interval); 3377 return frm; 3378} 3379#undef ADDSHORT 3380#undef ADDWORD 3381 3382/* 3383 * Initialize any mesh-specific node state. 3384 */ 3385void 3386ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3387{ 3388 ni->ni_flags |= IEEE80211_NODE_QOS; 3389 callout_init(&ni->ni_mltimer, 1); 3390 callout_init(&ni->ni_mlhtimer, 1); 3391} 3392 3393/* 3394 * Cleanup any mesh-specific node state. 3395 */ 3396void 3397ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3398{ 3399 struct ieee80211vap *vap = ni->ni_vap; 3400 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3401 3402 callout_drain(&ni->ni_mltimer); 3403 callout_drain(&ni->ni_mlhtimer); 3404 /* NB: short-circuit callbacks after mesh_vdetach */ 3405 if (vap->iv_mesh != NULL) 3406 ms->ms_ppath->mpp_peerdown(ni); 3407} 3408 3409void 3410ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3411{ 3412 ni->ni_meshidlen = ie[1]; 3413 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3414} 3415 3416/* 3417 * Setup mesh-specific node state on neighbor discovery. 3418 */ 3419void 3420ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3421 const struct ieee80211_frame *wh, 3422 const struct ieee80211_scanparams *sp) 3423{ 3424 ieee80211_parse_meshid(ni, sp->meshid); 3425} 3426 3427void 3428ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3429 struct ieee80211_beacon_offsets *bo) 3430{ 3431 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3432 3433 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3434 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3435 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3436 } 3437} 3438 3439static int 3440mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3441{ 3442 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3443 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3444 struct ieee80211_mesh_route *rt; 3445 struct ieee80211req_mesh_route *imr; 3446 size_t len, off; 3447 uint8_t *p; 3448 int error; 3449 3450 if (vap->iv_opmode != IEEE80211_M_MBSS) 3451 return ENOSYS; 3452 3453 error = 0; 3454 switch (ireq->i_type) { 3455 case IEEE80211_IOC_MESH_ID: 3456 ireq->i_len = ms->ms_idlen; 3457 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3458 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3459 break; 3460 case IEEE80211_IOC_MESH_AP: 3461 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3462 break; 3463 case IEEE80211_IOC_MESH_FWRD: 3464 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3465 break; 3466 case IEEE80211_IOC_MESH_GATE: 3467 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3468 break; 3469 case IEEE80211_IOC_MESH_TTL: 3470 ireq->i_val = ms->ms_ttl; 3471 break; 3472 case IEEE80211_IOC_MESH_RTCMD: 3473 switch (ireq->i_val) { 3474 case IEEE80211_MESH_RTCMD_LIST: 3475 len = 0; 3476 MESH_RT_LOCK(ms); 3477 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3478 len += sizeof(*imr); 3479 } 3480 MESH_RT_UNLOCK(ms); 3481 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3482 ireq->i_len = len; 3483 return ENOMEM; 3484 } 3485 ireq->i_len = len; 3486 /* XXX M_WAIT? */ 3487 p = IEEE80211_MALLOC(len, M_TEMP, 3488 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 3489 if (p == NULL) 3490 return ENOMEM; 3491 off = 0; 3492 MESH_RT_LOCK(ms); 3493 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3494 if (off >= len) 3495 break; 3496 imr = (struct ieee80211req_mesh_route *) 3497 (p + off); 3498 IEEE80211_ADDR_COPY(imr->imr_dest, 3499 rt->rt_dest); 3500 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3501 rt->rt_nexthop); 3502 imr->imr_metric = rt->rt_metric; 3503 imr->imr_nhops = rt->rt_nhops; 3504 imr->imr_lifetime = 3505 ieee80211_mesh_rt_update(rt, 0); 3506 imr->imr_lastmseq = rt->rt_lastmseq; 3507 imr->imr_flags = rt->rt_flags; /* last */ 3508 off += sizeof(*imr); 3509 } 3510 MESH_RT_UNLOCK(ms); 3511 error = copyout(p, (uint8_t *)ireq->i_data, 3512 ireq->i_len); 3513 IEEE80211_FREE(p, M_TEMP); 3514 break; 3515 case IEEE80211_MESH_RTCMD_FLUSH: 3516 case IEEE80211_MESH_RTCMD_ADD: 3517 case IEEE80211_MESH_RTCMD_DELETE: 3518 return EINVAL; 3519 default: 3520 return ENOSYS; 3521 } 3522 break; 3523 case IEEE80211_IOC_MESH_PR_METRIC: 3524 len = strlen(ms->ms_pmetric->mpm_descr); 3525 if (ireq->i_len < len) 3526 return EINVAL; 3527 ireq->i_len = len; 3528 error = copyout(ms->ms_pmetric->mpm_descr, 3529 (uint8_t *)ireq->i_data, len); 3530 break; 3531 case IEEE80211_IOC_MESH_PR_PATH: 3532 len = strlen(ms->ms_ppath->mpp_descr); 3533 if (ireq->i_len < len) 3534 return EINVAL; 3535 ireq->i_len = len; 3536 error = copyout(ms->ms_ppath->mpp_descr, 3537 (uint8_t *)ireq->i_data, len); 3538 break; 3539 default: 3540 return ENOSYS; 3541 } 3542 3543 return error; 3544} 3545IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3546 3547static int 3548mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3549{ 3550 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3551 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3552 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3553 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3554 int error; 3555 3556 if (vap->iv_opmode != IEEE80211_M_MBSS) 3557 return ENOSYS; 3558 3559 error = 0; 3560 switch (ireq->i_type) { 3561 case IEEE80211_IOC_MESH_ID: 3562 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3563 return EINVAL; 3564 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3565 if (error != 0) 3566 break; 3567 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3568 ms->ms_idlen = ireq->i_len; 3569 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3570 error = ENETRESET; 3571 break; 3572 case IEEE80211_IOC_MESH_AP: 3573 if (ireq->i_val) 3574 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3575 else 3576 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3577 error = ENETRESET; 3578 break; 3579 case IEEE80211_IOC_MESH_FWRD: 3580 if (ireq->i_val) 3581 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3582 else 3583 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3584 mesh_gatemode_setup(vap); 3585 break; 3586 case IEEE80211_IOC_MESH_GATE: 3587 if (ireq->i_val) 3588 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3589 else 3590 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3591 break; 3592 case IEEE80211_IOC_MESH_TTL: 3593 ms->ms_ttl = (uint8_t) ireq->i_val; 3594 break; 3595 case IEEE80211_IOC_MESH_RTCMD: 3596 switch (ireq->i_val) { 3597 case IEEE80211_MESH_RTCMD_LIST: 3598 return EINVAL; 3599 case IEEE80211_MESH_RTCMD_FLUSH: 3600 ieee80211_mesh_rt_flush(vap); 3601 break; 3602 case IEEE80211_MESH_RTCMD_ADD: 3603 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3604 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3605 return EINVAL; 3606 error = copyin(ireq->i_data, &tmpaddr, 3607 IEEE80211_ADDR_LEN); 3608 if (error == 0) 3609 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3610 break; 3611 case IEEE80211_MESH_RTCMD_DELETE: 3612 ieee80211_mesh_rt_del(vap, ireq->i_data); 3613 break; 3614 default: 3615 return ENOSYS; 3616 } 3617 break; 3618 case IEEE80211_IOC_MESH_PR_METRIC: 3619 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3620 if (error == 0) { 3621 error = mesh_select_proto_metric(vap, tmpproto); 3622 if (error == 0) 3623 error = ENETRESET; 3624 } 3625 break; 3626 case IEEE80211_IOC_MESH_PR_PATH: 3627 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3628 if (error == 0) { 3629 error = mesh_select_proto_path(vap, tmpproto); 3630 if (error == 0) 3631 error = ENETRESET; 3632 } 3633 break; 3634 default: 3635 return ENOSYS; 3636 } 3637 return error; 3638} 3639IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3640