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("$FreeBSD$"); 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 70 static void mesh_rt_flush_invalid(struct ieee80211vap *); 71 static int mesh_select_proto_path(struct ieee80211vap *, const char *); 72 static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 73 static void mesh_vattach(struct ieee80211vap *); 74 static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 75 static void mesh_rt_cleanup_cb(void *); 76 static void mesh_gatemode_setup(struct ieee80211vap *); 77 static void mesh_gatemode_cb(void *); 78 static void mesh_linkchange(struct ieee80211_node *, 79 enum ieee80211_mesh_mlstate); 80 static void mesh_checkid(void *, struct ieee80211_node *); 81 static uint32_t mesh_generateid(struct ieee80211vap *); 82 static int mesh_checkpseq(struct ieee80211vap *, 83 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 84 static void mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *, 85 struct ieee80211_mesh_route *); 86 static void mesh_forward(struct ieee80211vap *, struct mbuf *, 87 const struct ieee80211_meshcntl *); 88 static int mesh_input(struct ieee80211_node *, struct mbuf *, 89 const struct ieee80211_rx_stats *rxs, int, int); 90 static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 91 const struct ieee80211_rx_stats *rxs, int, int); 92 static void mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int); 93 static void mesh_peer_timeout_setup(struct ieee80211_node *); 94 static void mesh_peer_timeout_backoff(struct ieee80211_node *); 95 static void mesh_peer_timeout_cb(void *); 96 static __inline void 97 mesh_peer_timeout_stop(struct ieee80211_node *); 98 static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 99 static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 100 static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 101 const uint8_t *); 102 uint32_t mesh_airtime_calc(struct ieee80211_node *); 103 104 /* 105 * Timeout values come from the specification and are in milliseconds. 106 */ 107 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 108 "IEEE 802.11s parameters"); 109 static int ieee80211_mesh_gateint = -1; 110 SYSCTL_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)"); 113 static int ieee80211_mesh_retrytimeout = -1; 114 SYSCTL_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)"); 117 static int ieee80211_mesh_holdingtimeout = -1; 118 119 SYSCTL_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)"); 122 static int ieee80211_mesh_confirmtimeout = -1; 123 SYSCTL_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)"); 126 static int ieee80211_mesh_backofftimeout = -1; 127 SYSCTL_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"); 131 static int ieee80211_mesh_maxretries = 2; 132 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW, 133 &ieee80211_mesh_maxretries, 0, 134 "Maximum retries during peer link establishment"); 135 static int ieee80211_mesh_maxholding = 2; 136 SYSCTL_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"); 140 141 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 142 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 143 144 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 145 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 146 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 147 static ieee80211_recv_action_func mesh_recv_action_meshlmetric; 148 static ieee80211_recv_action_func mesh_recv_action_meshgate; 149 150 static ieee80211_send_action_func mesh_send_action_meshpeering_open; 151 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 152 static ieee80211_send_action_func mesh_send_action_meshpeering_close; 153 static ieee80211_send_action_func mesh_send_action_meshlmetric; 154 static ieee80211_send_action_func mesh_send_action_meshgate; 155 156 static 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 }; 161 162 static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 163 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 164 165 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame"); 166 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame"); 167 MALLOC_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) 171 172 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table"); 173 MALLOC_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 */ 178 179 static struct ieee80211_mesh_route * 180 mesh_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 } 193 194 static struct ieee80211_mesh_route * 195 mesh_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 } 220 221 struct ieee80211_mesh_route * 222 ieee80211_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 } 233 234 struct ieee80211_mesh_route * 235 ieee80211_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 */ 257 int 258 ieee80211_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 */ 299 void 300 ieee80211_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 } 344 345 static __inline void 346 mesh_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 } 358 359 void 360 ieee80211_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 } 383 384 void 385 ieee80211_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 } 397 398 void 399 ieee80211_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 */ 417 static void 418 mesh_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 } 436 437 int 438 ieee80211_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 } 455 456 int 457 ieee80211_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 } 475 476 static int 477 mesh_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 } 490 491 static int 492 mesh_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 } 505 506 static void 507 mesh_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 } 525 526 static void 527 mesh_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 } 547 548 static void 549 ieee80211_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 } 603 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 604 605 void 606 ieee80211_mesh_attach(struct ieee80211com *ic) 607 { 608 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 609 } 610 611 void 612 ieee80211_mesh_detach(struct ieee80211com *ic) 613 { 614 } 615 616 static void 617 mesh_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 } 636 637 static void 638 mesh_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 } 651 652 static void 653 mesh_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 */ 687 static int 688 mesh_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(ni, 807 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 808 ieee80211_htchanflags(ni->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 ieee80211_note(vap, 816 "synchronized with %s meshid ", 817 ether_sprintf(ni->ni_meshid)); 818 ieee80211_print_essid(ni->ni_meshid, 819 ni->ni_meshidlen); 820 /* XXX MCS/HT */ 821 printf(" channel %d\n", 822 ieee80211_chan2ieee(ic, ic->ic_curchan)); 823 } 824 #endif 825 break; 826 default: 827 break; 828 } 829 ieee80211_node_authorize(ni); 830 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 831 mesh_rt_cleanup_cb, vap); 832 mesh_gatemode_setup(vap); 833 break; 834 default: 835 break; 836 } 837 /* NB: ostate not nstate */ 838 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 839 return 0; 840 } 841 842 static void 843 mesh_rt_cleanup_cb(void *arg) 844 { 845 struct ieee80211vap *vap = arg; 846 struct ieee80211_mesh_state *ms = vap->iv_mesh; 847 848 mesh_rt_flush_invalid(vap); 849 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 850 mesh_rt_cleanup_cb, vap); 851 } 852 853 /* 854 * Mark a mesh STA as gate and return a pointer to it. 855 * If this is first time, we create a new gate route. 856 * Always update the path route to this mesh gate. 857 */ 858 struct ieee80211_mesh_gate_route * 859 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 860 struct ieee80211_mesh_route *rt) 861 { 862 struct ieee80211_mesh_state *ms = vap->iv_mesh; 863 struct ieee80211_mesh_gate_route *gr = NULL, *next; 864 int found = 0; 865 866 MESH_RT_LOCK(ms); 867 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 868 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 869 found = 1; 870 break; 871 } 872 } 873 874 if (!found) { 875 /* New mesh gate add it to known table. */ 876 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 877 "%s", "stored new gate information from pro-PREQ."); 878 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 879 M_80211_MESH_GT_RT, 880 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 881 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 882 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 883 } 884 gr->gr_route = rt; 885 /* TODO: link from path route to gate route */ 886 MESH_RT_UNLOCK(ms); 887 888 return gr; 889 } 890 891 892 /* 893 * Helper function to note the Mesh Peer Link FSM change. 894 */ 895 static void 896 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 897 { 898 struct ieee80211vap *vap = ni->ni_vap; 899 struct ieee80211_mesh_state *ms = vap->iv_mesh; 900 #ifdef IEEE80211_DEBUG 901 static const char *meshlinkstates[] = { 902 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 903 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 904 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 905 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 906 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 907 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 908 }; 909 #endif 910 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 911 ni, "peer link: %s -> %s", 912 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 913 914 /* track neighbor count */ 915 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 916 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 917 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 918 ms->ms_neighbors++; 919 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 920 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 921 state != IEEE80211_NODE_MESH_ESTABLISHED) { 922 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 923 ms->ms_neighbors--; 924 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 925 } 926 ni->ni_mlstate = state; 927 switch (state) { 928 case IEEE80211_NODE_MESH_HOLDING: 929 ms->ms_ppath->mpp_peerdown(ni); 930 break; 931 case IEEE80211_NODE_MESH_ESTABLISHED: 932 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 933 break; 934 default: 935 break; 936 } 937 } 938 939 /* 940 * Helper function to generate a unique local ID required for mesh 941 * peer establishment. 942 */ 943 static void 944 mesh_checkid(void *arg, struct ieee80211_node *ni) 945 { 946 uint16_t *r = arg; 947 948 if (*r == ni->ni_mllid) 949 *(uint16_t *)arg = 0; 950 } 951 952 static uint32_t 953 mesh_generateid(struct ieee80211vap *vap) 954 { 955 int maxiter = 4; 956 uint16_t r; 957 958 do { 959 get_random_bytes(&r, 2); 960 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 961 maxiter--; 962 } while (r == 0 && maxiter > 0); 963 return r; 964 } 965 966 /* 967 * Verifies if we already received this packet by checking its 968 * sequence number. 969 * Returns 0 if the frame is to be accepted, 1 otherwise. 970 */ 971 static int 972 mesh_checkpseq(struct ieee80211vap *vap, 973 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 974 { 975 struct ieee80211_mesh_route *rt; 976 977 rt = ieee80211_mesh_rt_find(vap, source); 978 if (rt == NULL) { 979 rt = ieee80211_mesh_rt_add(vap, source); 980 if (rt == NULL) { 981 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 982 "%s", "add mcast route failed"); 983 vap->iv_stats.is_mesh_rtaddfailed++; 984 return 1; 985 } 986 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 987 "add mcast route, mesh seqno %d", seq); 988 rt->rt_lastmseq = seq; 989 return 0; 990 } 991 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 992 return 1; 993 } else { 994 rt->rt_lastmseq = seq; 995 return 0; 996 } 997 } 998 999 /* 1000 * Iterate the routing table and locate the next hop. 1001 */ 1002 struct ieee80211_node * 1003 ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1004 const uint8_t dest[IEEE80211_ADDR_LEN]) 1005 { 1006 struct ieee80211_mesh_route *rt; 1007 1008 rt = ieee80211_mesh_rt_find(vap, dest); 1009 if (rt == NULL) 1010 return NULL; 1011 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1012 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1013 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1014 /* XXX stat */ 1015 return NULL; 1016 } 1017 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1018 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1019 if (rt == NULL) return NULL; 1020 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1021 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1022 "%s: meshgate !valid, flags 0x%x", __func__, 1023 rt->rt_flags); 1024 /* XXX stat */ 1025 return NULL; 1026 } 1027 } 1028 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1029 } 1030 1031 static void 1032 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1033 struct ieee80211_mesh_route *rt_gate) 1034 { 1035 struct ifnet *ifp = vap->iv_ifp; 1036 struct ieee80211_node *ni; 1037 1038 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1039 1040 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1041 if (ni == NULL) { 1042 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1043 m_freem(m); 1044 return; 1045 } 1046 1047 /* 1048 * Send through the VAP packet transmit path. 1049 * This consumes the node ref grabbed above and 1050 * the mbuf, regardless of whether there's a problem 1051 * or not. 1052 */ 1053 (void) ieee80211_vap_pkt_send_dest(vap, m, ni); 1054 } 1055 1056 /* 1057 * Forward the queued frames to known valid mesh gates. 1058 * Assume destination to be outside the MBSS (i.e. proxy entry), 1059 * If no valid mesh gates are known silently discard queued frames. 1060 * After transmitting frames to all known valid mesh gates, this route 1061 * will be marked invalid, and a new path discovery will happen in the hopes 1062 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1063 */ 1064 void 1065 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1066 struct ieee80211_mesh_route *rt_dest) 1067 { 1068 struct ieee80211com *ic = vap->iv_ic; 1069 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1070 struct ieee80211_mesh_route *rt_gate; 1071 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1072 struct mbuf *m, *mcopy, *next; 1073 1074 IEEE80211_TX_UNLOCK_ASSERT(ic); 1075 1076 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1077 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1078 1079 /* XXX: send to more than one valid mash gate */ 1080 MESH_RT_LOCK(ms); 1081 1082 m = ieee80211_ageq_remove(&ic->ic_stageq, 1083 (struct ieee80211_node *)(uintptr_t) 1084 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1085 1086 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1087 rt_gate = gr->gr_route; 1088 if (rt_gate == NULL) { 1089 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1090 rt_dest->rt_dest, 1091 "mesh gate with no path %6D", 1092 gr->gr_addr, ":"); 1093 continue; 1094 } 1095 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1096 continue; 1097 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1098 ("route not marked as a mesh gate")); 1099 KASSERT((rt_gate->rt_flags & 1100 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1101 ("found mesh gate that is also marked porxy")); 1102 /* 1103 * convert route to a proxy route gated by the current 1104 * mesh gate, this is needed so encap can built data 1105 * frame with correct address. 1106 */ 1107 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1108 IEEE80211_MESHRT_FLAGS_VALID; 1109 rt_dest->rt_ext_seq = 1; /* random value */ 1110 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1111 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1112 rt_dest->rt_metric = rt_gate->rt_metric; 1113 rt_dest->rt_nhops = rt_gate->rt_nhops; 1114 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1115 MESH_RT_UNLOCK(ms); 1116 /* XXX: lock?? */ 1117 mcopy = m_dup(m, M_NOWAIT); 1118 for (; mcopy != NULL; mcopy = next) { 1119 next = mcopy->m_nextpkt; 1120 mcopy->m_nextpkt = NULL; 1121 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1122 rt_dest->rt_dest, 1123 "flush queued frame %p len %d", mcopy, 1124 mcopy->m_pkthdr.len); 1125 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1126 } 1127 MESH_RT_LOCK(ms); 1128 } 1129 rt_dest->rt_flags = 0; /* Mark invalid */ 1130 m_freem(m); 1131 MESH_RT_UNLOCK(ms); 1132 } 1133 1134 /* 1135 * Forward the specified frame. 1136 * Decrement the TTL and set TA to our MAC address. 1137 */ 1138 static void 1139 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1140 const struct ieee80211_meshcntl *mc) 1141 { 1142 struct ieee80211com *ic = vap->iv_ic; 1143 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1144 struct ifnet *ifp = vap->iv_ifp; 1145 const struct ieee80211_frame *wh = 1146 mtod(m, const struct ieee80211_frame *); 1147 struct mbuf *mcopy; 1148 struct ieee80211_meshcntl *mccopy; 1149 struct ieee80211_frame *whcopy; 1150 struct ieee80211_node *ni; 1151 int err; 1152 1153 /* This is called from the RX path - don't hold this lock */ 1154 IEEE80211_TX_UNLOCK_ASSERT(ic); 1155 1156 /* 1157 * mesh ttl of 1 means we are the last one receiving it, 1158 * according to amendment we decrement and then check if 1159 * 0, if so we dont forward. 1160 */ 1161 if (mc->mc_ttl < 1) { 1162 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1163 "%s", "frame not fwd'd, ttl 1"); 1164 vap->iv_stats.is_mesh_fwd_ttl++; 1165 return; 1166 } 1167 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1168 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1169 "%s", "frame not fwd'd, fwding disabled"); 1170 vap->iv_stats.is_mesh_fwd_disabled++; 1171 return; 1172 } 1173 mcopy = m_dup(m, M_NOWAIT); 1174 if (mcopy == NULL) { 1175 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1176 "%s", "frame not fwd'd, cannot dup"); 1177 vap->iv_stats.is_mesh_fwd_nobuf++; 1178 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1179 return; 1180 } 1181 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1182 sizeof(struct ieee80211_meshcntl)); 1183 if (mcopy == NULL) { 1184 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1185 "%s", "frame not fwd'd, too short"); 1186 vap->iv_stats.is_mesh_fwd_tooshort++; 1187 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1188 m_freem(mcopy); 1189 return; 1190 } 1191 whcopy = mtod(mcopy, struct ieee80211_frame *); 1192 mccopy = (struct ieee80211_meshcntl *) 1193 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1194 /* XXX clear other bits? */ 1195 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1196 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1197 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1198 ni = ieee80211_ref_node(vap->iv_bss); 1199 mcopy->m_flags |= M_MCAST; 1200 } else { 1201 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1202 if (ni == NULL) { 1203 /* 1204 * [Optional] any of the following three actions: 1205 * o silently discard 1206 * o trigger a path discovery 1207 * o inform TA that meshDA is unknown. 1208 */ 1209 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1210 "%s", "frame not fwd'd, no path"); 1211 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1212 IEEE80211_REASON_MESH_PERR_NO_FI); 1213 vap->iv_stats.is_mesh_fwd_nopath++; 1214 m_freem(mcopy); 1215 return; 1216 } 1217 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1218 } 1219 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1220 mccopy->mc_ttl--; 1221 1222 /* XXX calculate priority so drivers can find the tx queue */ 1223 M_WME_SETAC(mcopy, WME_AC_BE); 1224 1225 /* XXX do we know m_nextpkt is NULL? */ 1226 mcopy->m_pkthdr.rcvif = (void *) ni; 1227 1228 /* 1229 * XXX this bypasses all of the VAP TX handling; it passes frames 1230 * directly to the parent interface. 1231 * 1232 * Because of this, there's no TX lock being held as there's no 1233 * encaps state being used. 1234 * 1235 * Doing a direct parent transmit may not be the correct thing 1236 * to do here; we'll have to re-think this soon. 1237 */ 1238 IEEE80211_TX_LOCK(ic); 1239 err = ieee80211_parent_xmitpkt(ic, mcopy); 1240 IEEE80211_TX_UNLOCK(ic); 1241 if (!err) 1242 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1243 } 1244 1245 static struct mbuf * 1246 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1247 { 1248 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1249 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1250 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1251 sizeof(struct ieee80211_meshcntl_ae10)]; 1252 const struct ieee80211_qosframe_addr4 *wh; 1253 const struct ieee80211_meshcntl_ae10 *mc; 1254 struct ether_header *eh; 1255 struct llc *llc; 1256 int ae; 1257 1258 if (m->m_len < hdrlen + sizeof(*llc) && 1259 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1260 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1261 "discard data frame: %s", "m_pullup failed"); 1262 vap->iv_stats.is_rx_tooshort++; 1263 return NULL; 1264 } 1265 memcpy(b, mtod(m, caddr_t), hdrlen); 1266 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1267 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1268 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1269 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1270 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1271 1272 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1273 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1274 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1275 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1276 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1277 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1278 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1279 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1280 llc = NULL; 1281 } else { 1282 m_adj(m, hdrlen - sizeof(*eh)); 1283 } 1284 eh = mtod(m, struct ether_header *); 1285 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1286 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1287 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1288 if (ae == IEEE80211_MESH_AE_00) { 1289 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1290 } else if (ae == IEEE80211_MESH_AE_01) { 1291 IEEE80211_ADDR_COPY(eh->ether_shost, 1292 MC01(mc)->mc_addr4); 1293 } else { 1294 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1295 (const struct ieee80211_frame *)wh, NULL, 1296 "bad AE %d", ae); 1297 vap->iv_stats.is_mesh_badae++; 1298 m_freem(m); 1299 return NULL; 1300 } 1301 } else { 1302 if (ae == IEEE80211_MESH_AE_00) { 1303 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1304 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1305 } else if (ae == IEEE80211_MESH_AE_10) { 1306 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1307 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1308 } else { 1309 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1310 (const struct ieee80211_frame *)wh, NULL, 1311 "bad AE %d", ae); 1312 vap->iv_stats.is_mesh_badae++; 1313 m_freem(m); 1314 return NULL; 1315 } 1316 } 1317 #ifndef __NO_STRICT_ALIGNMENT 1318 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1319 m = ieee80211_realign(vap, m, sizeof(*eh)); 1320 if (m == NULL) 1321 return NULL; 1322 } 1323 #endif /* !__NO_STRICT_ALIGNMENT */ 1324 if (llc != NULL) { 1325 eh = mtod(m, struct ether_header *); 1326 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1327 } 1328 return m; 1329 #undef WDIR 1330 #undef MC01 1331 } 1332 1333 /* 1334 * Return non-zero if the unicast mesh data frame should be processed 1335 * locally. Frames that are not proxy'd have our address, otherwise 1336 * we need to consult the routing table to look for a proxy entry. 1337 */ 1338 static __inline int 1339 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1340 const struct ieee80211_meshcntl *mc) 1341 { 1342 int ae = mc->mc_flags & 3; 1343 1344 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1345 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1346 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1347 ("bad AE %d", ae)); 1348 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1349 const struct ieee80211_meshcntl_ae10 *mc10 = 1350 (const struct ieee80211_meshcntl_ae10 *) mc; 1351 struct ieee80211_mesh_route *rt = 1352 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1353 /* check for proxy route to ourself */ 1354 return (rt != NULL && 1355 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1356 } else /* ucast w/o proxy */ 1357 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1358 } 1359 1360 /* 1361 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1362 * > 0 means we have forwarded data and no need to process locally 1363 * == 0 means we want to process locally (and we may have forwarded data 1364 * < 0 means there was an error and data should be discarded 1365 */ 1366 static int 1367 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1368 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1369 { 1370 struct ieee80211_qosframe_addr4 *qwh; 1371 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1372 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1373 1374 /* This is called from the RX path - don't hold this lock */ 1375 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1376 1377 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1378 1379 /* 1380 * TODO: 1381 * o verify addr2 is a legitimate transmitter 1382 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1383 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1384 */ 1385 1386 /* set lifetime of addr3 (meshDA) to initial value */ 1387 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1388 if (rt_meshda == NULL) { 1389 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1390 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1391 /* 1392 * [Optional] any of the following three actions: 1393 * o silently discard [X] 1394 * o trigger a path discovery [ ] 1395 * o inform TA that meshDA is unknown. [ ] 1396 */ 1397 /* XXX: stats */ 1398 return (-1); 1399 } 1400 1401 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1402 ms->ms_ppath->mpp_inact)); 1403 1404 /* set lifetime of addr4 (meshSA) to initial value */ 1405 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1406 KASSERT(rt_meshsa != NULL, ("no route")); 1407 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1408 ms->ms_ppath->mpp_inact)); 1409 1410 mesh_forward(vap, m, mc); 1411 return (1); /* dont process locally */ 1412 } 1413 1414 /* 1415 * Verifies transmitter, updates lifetime, precursor list and process data 1416 * locally, if data is proxy with AE = 10 it could mean data should go 1417 * on another mesh path or data should be forwarded to the DS. 1418 * 1419 * > 0 means we have forwarded data and no need to process locally 1420 * == 0 means we want to process locally (and we may have forwarded data 1421 * < 0 means there was an error and data should be discarded 1422 */ 1423 static int 1424 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1425 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1426 { 1427 struct ieee80211_qosframe_addr4 *qwh; 1428 const struct ieee80211_meshcntl_ae10 *mc10; 1429 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1430 struct ieee80211_mesh_route *rt; 1431 int ae; 1432 1433 /* This is called from the RX path - don't hold this lock */ 1434 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1435 1436 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1437 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1438 1439 /* 1440 * TODO: 1441 * o verify addr2 is a legitimate transmitter 1442 * o lifetime of precursor entry is max(init, curr) 1443 */ 1444 1445 /* set lifetime of addr4 (meshSA) to initial value */ 1446 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1447 KASSERT(rt != NULL, ("no route")); 1448 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1449 rt = NULL; 1450 1451 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1452 KASSERT(ae == IEEE80211_MESH_AE_00 || 1453 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1454 if (ae == IEEE80211_MESH_AE_10) { 1455 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1456 return (0); /* process locally */ 1457 } 1458 1459 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1460 if (rt != NULL && 1461 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1462 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1463 /* 1464 * Forward on another mesh-path, according to 1465 * amendment as specified in 9.32.4.1 1466 */ 1467 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1468 mesh_forward(vap, m, 1469 (const struct ieee80211_meshcntl *)mc10); 1470 return (1); /* dont process locally */ 1471 } 1472 /* 1473 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1474 * addressed according to 13.11.3.2. 1475 */ 1476 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1477 "forward frame to DS, SA(%6D) DA(%6D)", 1478 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1479 } 1480 return (0); /* process locally */ 1481 } 1482 1483 /* 1484 * Try to forward the group addressed data on to other mesh STAs, and 1485 * also to the DS. 1486 * 1487 * > 0 means we have forwarded data and no need to process locally 1488 * == 0 means we want to process locally (and we may have forwarded data 1489 * < 0 means there was an error and data should be discarded 1490 */ 1491 static int 1492 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1493 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1494 { 1495 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1496 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1497 1498 /* This is called from the RX path - don't hold this lock */ 1499 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1500 1501 mesh_forward(vap, m, mc); 1502 1503 if(mc->mc_ttl > 0) { 1504 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1505 /* 1506 * Forward of MSDUs from the MBSS to DS group addressed 1507 * (according to 13.11.3.2) 1508 * This happens by delivering the packet, and a bridge 1509 * will sent it on another port member. 1510 */ 1511 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1512 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) { 1513 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1514 MC01(mc)->mc_addr4, "%s", 1515 "forward from MBSS to the DS"); 1516 } 1517 } 1518 } 1519 return (0); /* process locally */ 1520 #undef MC01 1521 } 1522 1523 static int 1524 mesh_input(struct ieee80211_node *ni, struct mbuf *m, 1525 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1526 { 1527 #define HAS_SEQ(type) ((type & 0x4) == 0) 1528 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1529 struct ieee80211vap *vap = ni->ni_vap; 1530 struct ieee80211com *ic = ni->ni_ic; 1531 struct ifnet *ifp = vap->iv_ifp; 1532 struct ieee80211_frame *wh; 1533 const struct ieee80211_meshcntl *mc; 1534 int hdrspace, meshdrlen, need_tap, error; 1535 uint8_t dir, type, subtype, ae; 1536 uint32_t seq; 1537 const uint8_t *addr; 1538 uint8_t qos[2]; 1539 1540 KASSERT(ni != NULL, ("null node")); 1541 ni->ni_inact = ni->ni_inact_reload; 1542 1543 need_tap = 1; /* mbuf need to be tapped. */ 1544 type = -1; /* undefined */ 1545 1546 /* This is called from the RX path - don't hold this lock */ 1547 IEEE80211_TX_UNLOCK_ASSERT(ic); 1548 1549 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1550 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1551 ni->ni_macaddr, NULL, 1552 "too short (1): len %u", m->m_pkthdr.len); 1553 vap->iv_stats.is_rx_tooshort++; 1554 goto out; 1555 } 1556 /* 1557 * Bit of a cheat here, we use a pointer for a 3-address 1558 * frame format but don't reference fields past outside 1559 * ieee80211_frame_min w/o first validating the data is 1560 * present. 1561 */ 1562 wh = mtod(m, struct ieee80211_frame *); 1563 1564 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1565 IEEE80211_FC0_VERSION_0) { 1566 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1567 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1568 vap->iv_stats.is_rx_badversion++; 1569 goto err; 1570 } 1571 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1572 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1573 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1574 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1575 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1576 ni->ni_noise = nf; 1577 if (HAS_SEQ(type)) { 1578 uint8_t tid = ieee80211_gettid(wh); 1579 1580 if (IEEE80211_QOS_HAS_SEQ(wh) && 1581 TID_TO_WME_AC(tid) >= WME_AC_VI) 1582 ic->ic_wme.wme_hipri_traffic++; 1583 if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs)) 1584 goto out; 1585 } 1586 } 1587 #ifdef IEEE80211_DEBUG 1588 /* 1589 * It's easier, but too expensive, to simulate different mesh 1590 * topologies by consulting the ACL policy very early, so do this 1591 * only under DEBUG. 1592 * 1593 * NB: this check is also done upon peering link initiation. 1594 */ 1595 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1596 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1597 wh, NULL, "%s", "disallowed by ACL"); 1598 vap->iv_stats.is_rx_acl++; 1599 goto out; 1600 } 1601 #endif 1602 switch (type) { 1603 case IEEE80211_FC0_TYPE_DATA: 1604 if (ni == vap->iv_bss) 1605 goto out; 1606 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1607 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1608 ni->ni_macaddr, NULL, 1609 "peer link not yet established (%d)", 1610 ni->ni_mlstate); 1611 vap->iv_stats.is_mesh_nolink++; 1612 goto out; 1613 } 1614 if (dir != IEEE80211_FC1_DIR_FROMDS && 1615 dir != IEEE80211_FC1_DIR_DSTODS) { 1616 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1617 wh, "data", "incorrect dir 0x%x", dir); 1618 vap->iv_stats.is_rx_wrongdir++; 1619 goto err; 1620 } 1621 1622 /* All Mesh data frames are QoS subtype */ 1623 if (!HAS_SEQ(type)) { 1624 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1625 wh, "data", "incorrect subtype 0x%x", subtype); 1626 vap->iv_stats.is_rx_badsubtype++; 1627 goto err; 1628 } 1629 1630 /* 1631 * Next up, any fragmentation. 1632 * XXX: we defrag before we even try to forward, 1633 * Mesh Control field is not present in sub-sequent 1634 * fragmented frames. This is in contrast to Draft 4.0. 1635 */ 1636 hdrspace = ieee80211_hdrspace(ic, wh); 1637 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1638 m = ieee80211_defrag(ni, m, hdrspace); 1639 if (m == NULL) { 1640 /* Fragment dropped or frame not complete yet */ 1641 goto out; 1642 } 1643 } 1644 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1645 1646 /* 1647 * Now we have a complete Mesh Data frame. 1648 */ 1649 1650 /* 1651 * Only fromDStoDS data frames use 4 address qos frames 1652 * as specified in amendment. Otherwise addr4 is located 1653 * in the Mesh Control field and a 3 address qos frame 1654 * is used. 1655 */ 1656 if (IEEE80211_IS_DSTODS(wh)) 1657 *(uint16_t *)qos = *(uint16_t *) 1658 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1659 else 1660 *(uint16_t *)qos = *(uint16_t *) 1661 ((struct ieee80211_qosframe *)wh)->i_qos; 1662 1663 /* 1664 * NB: The mesh STA sets the Mesh Control Present 1665 * subfield to 1 in the Mesh Data frame containing 1666 * an unfragmented MSDU, an A-MSDU, or the first 1667 * fragment of an MSDU. 1668 * After defrag it should always be present. 1669 */ 1670 if (!(qos[1] & IEEE80211_QOS_MC)) { 1671 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1672 ni->ni_macaddr, NULL, 1673 "%s", "Mesh control field not present"); 1674 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1675 goto err; 1676 } 1677 1678 /* pull up enough to get to the mesh control */ 1679 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1680 (m = m_pullup(m, hdrspace + 1681 sizeof(struct ieee80211_meshcntl))) == NULL) { 1682 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1683 ni->ni_macaddr, NULL, 1684 "data too short: expecting %u", hdrspace); 1685 vap->iv_stats.is_rx_tooshort++; 1686 goto out; /* XXX */ 1687 } 1688 /* 1689 * Now calculate the full extent of the headers. Note 1690 * mesh_decap will pull up anything we didn't get 1691 * above when it strips the 802.11 headers. 1692 */ 1693 mc = (const struct ieee80211_meshcntl *) 1694 (mtod(m, const uint8_t *) + hdrspace); 1695 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1696 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1697 ae * IEEE80211_ADDR_LEN; 1698 hdrspace += meshdrlen; 1699 1700 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1701 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1702 (m->m_len < hdrspace) && 1703 ((m = m_pullup(m, hdrspace)) == 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 /* XXX: are we sure there is no reallocating after m_pullup? */ 1711 1712 seq = le32dec(mc->mc_seq); 1713 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1714 addr = wh->i_addr3; 1715 else if (ae == IEEE80211_MESH_AE_01) 1716 addr = MC01(mc)->mc_addr4; 1717 else 1718 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1719 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1720 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1721 addr, "data", "%s", "not to me"); 1722 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1723 goto out; 1724 } 1725 if (mesh_checkpseq(vap, addr, seq) != 0) { 1726 vap->iv_stats.is_rx_dup++; 1727 goto out; 1728 } 1729 1730 /* This code "routes" the frame to the right control path */ 1731 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1732 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1733 error = 1734 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1735 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1736 error = mesh_recv_group_data(vap, m, wh, mc); 1737 else 1738 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1739 wh, mc); 1740 } else 1741 error = mesh_recv_group_data(vap, m, wh, mc); 1742 if (error < 0) 1743 goto err; 1744 else if (error > 0) 1745 goto out; 1746 1747 if (ieee80211_radiotap_active_vap(vap)) 1748 ieee80211_radiotap_rx(vap, m); 1749 need_tap = 0; 1750 1751 /* 1752 * Finally, strip the 802.11 header. 1753 */ 1754 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1755 if (m == NULL) { 1756 /* XXX mask bit to check for both */ 1757 /* don't count Null data frames as errors */ 1758 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1759 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1760 goto out; 1761 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1762 ni->ni_macaddr, "data", "%s", "decap error"); 1763 vap->iv_stats.is_rx_decap++; 1764 IEEE80211_NODE_STAT(ni, rx_decap); 1765 goto err; 1766 } 1767 if (qos[0] & IEEE80211_QOS_AMSDU) { 1768 m = ieee80211_decap_amsdu(ni, m); 1769 if (m == NULL) 1770 return IEEE80211_FC0_TYPE_DATA; 1771 } 1772 ieee80211_deliver_data(vap, ni, m); 1773 return type; 1774 case IEEE80211_FC0_TYPE_MGT: 1775 vap->iv_stats.is_rx_mgmt++; 1776 IEEE80211_NODE_STAT(ni, rx_mgmt); 1777 if (dir != IEEE80211_FC1_DIR_NODS) { 1778 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1779 wh, "mgt", "incorrect dir 0x%x", dir); 1780 vap->iv_stats.is_rx_wrongdir++; 1781 goto err; 1782 } 1783 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1784 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1785 ni->ni_macaddr, "mgt", "too short: len %u", 1786 m->m_pkthdr.len); 1787 vap->iv_stats.is_rx_tooshort++; 1788 goto out; 1789 } 1790 #ifdef IEEE80211_DEBUG 1791 if ((ieee80211_msg_debug(vap) && 1792 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1793 ieee80211_msg_dumppkts(vap)) { 1794 if_printf(ifp, "received %s from %s rssi %d\n", 1795 ieee80211_mgt_subtype_name(subtype), 1796 ether_sprintf(wh->i_addr2), rssi); 1797 } 1798 #endif 1799 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1800 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1801 wh, NULL, "%s", "WEP set but not permitted"); 1802 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1803 goto out; 1804 } 1805 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 1806 goto out; 1807 case IEEE80211_FC0_TYPE_CTL: 1808 vap->iv_stats.is_rx_ctl++; 1809 IEEE80211_NODE_STAT(ni, rx_ctrl); 1810 goto out; 1811 default: 1812 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1813 wh, "bad", "frame type 0x%x", type); 1814 /* should not come here */ 1815 break; 1816 } 1817 err: 1818 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1819 out: 1820 if (m != NULL) { 1821 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1822 ieee80211_radiotap_rx(vap, m); 1823 m_freem(m); 1824 } 1825 return type; 1826 #undef HAS_SEQ 1827 #undef MC01 1828 } 1829 1830 static void 1831 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1832 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1833 { 1834 struct ieee80211vap *vap = ni->ni_vap; 1835 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1836 struct ieee80211com *ic = ni->ni_ic; 1837 struct ieee80211_channel *rxchan = ic->ic_curchan; 1838 struct ieee80211_frame *wh; 1839 struct ieee80211_mesh_route *rt; 1840 uint8_t *frm, *efrm; 1841 1842 wh = mtod(m0, struct ieee80211_frame *); 1843 frm = (uint8_t *)&wh[1]; 1844 efrm = mtod(m0, uint8_t *) + m0->m_len; 1845 switch (subtype) { 1846 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1847 case IEEE80211_FC0_SUBTYPE_BEACON: 1848 { 1849 struct ieee80211_scanparams scan; 1850 struct ieee80211_channel *c; 1851 /* 1852 * We process beacon/probe response 1853 * frames to discover neighbors. 1854 */ 1855 if (rxs != NULL) { 1856 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1857 if (c != NULL) 1858 rxchan = c; 1859 } 1860 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) 1861 return; 1862 /* 1863 * Count frame now that we know it's to be processed. 1864 */ 1865 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1866 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1867 IEEE80211_NODE_STAT(ni, rx_beacons); 1868 } else 1869 IEEE80211_NODE_STAT(ni, rx_proberesp); 1870 /* 1871 * If scanning, just pass information to the scan module. 1872 */ 1873 if (ic->ic_flags & IEEE80211_F_SCAN) { 1874 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1875 /* 1876 * Actively scanning a channel marked passive; 1877 * send a probe request now that we know there 1878 * is 802.11 traffic present. 1879 * 1880 * XXX check if the beacon we recv'd gives 1881 * us what we need and suppress the probe req 1882 */ 1883 ieee80211_probe_curchan(vap, 1); 1884 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1885 } 1886 ieee80211_add_scan(vap, rxchan, &scan, wh, 1887 subtype, rssi, nf); 1888 return; 1889 } 1890 1891 /* The rest of this code assumes we are running */ 1892 if (vap->iv_state != IEEE80211_S_RUN) 1893 return; 1894 /* 1895 * Ignore non-mesh STAs. 1896 */ 1897 if ((scan.capinfo & 1898 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1899 scan.meshid == NULL || scan.meshconf == NULL) { 1900 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1901 wh, "beacon", "%s", "not a mesh sta"); 1902 vap->iv_stats.is_mesh_wrongmesh++; 1903 return; 1904 } 1905 /* 1906 * Ignore STAs for other mesh networks. 1907 */ 1908 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1909 mesh_verify_meshconf(vap, scan.meshconf)) { 1910 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1911 wh, "beacon", "%s", "not for our mesh"); 1912 vap->iv_stats.is_mesh_wrongmesh++; 1913 return; 1914 } 1915 /* 1916 * Peer only based on the current ACL policy. 1917 */ 1918 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1919 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1920 wh, NULL, "%s", "disallowed by ACL"); 1921 vap->iv_stats.is_rx_acl++; 1922 return; 1923 } 1924 /* 1925 * Do neighbor discovery. 1926 */ 1927 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1928 /* 1929 * Create a new entry in the neighbor table. 1930 */ 1931 ni = ieee80211_add_neighbor(vap, wh, &scan); 1932 } 1933 /* 1934 * Automatically peer with discovered nodes if possible. 1935 */ 1936 if (ni != vap->iv_bss && 1937 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1938 switch (ni->ni_mlstate) { 1939 case IEEE80211_NODE_MESH_IDLE: 1940 { 1941 uint16_t args[1]; 1942 1943 /* Wait for backoff callout to reset counter */ 1944 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1945 return; 1946 1947 ni->ni_mlpid = mesh_generateid(vap); 1948 if (ni->ni_mlpid == 0) 1949 return; 1950 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1951 args[0] = ni->ni_mlpid; 1952 ieee80211_send_action(ni, 1953 IEEE80211_ACTION_CAT_SELF_PROT, 1954 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1955 ni->ni_mlrcnt = 0; 1956 mesh_peer_timeout_setup(ni); 1957 break; 1958 } 1959 case IEEE80211_NODE_MESH_ESTABLISHED: 1960 { 1961 /* 1962 * Valid beacon from a peer mesh STA 1963 * bump TA lifetime 1964 */ 1965 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1966 if(rt != NULL) { 1967 ieee80211_mesh_rt_update(rt, 1968 ticks_to_msecs( 1969 ms->ms_ppath->mpp_inact)); 1970 } 1971 break; 1972 } 1973 default: 1974 break; /* ignore */ 1975 } 1976 } 1977 break; 1978 } 1979 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1980 { 1981 uint8_t *ssid, *meshid, *rates, *xrates; 1982 1983 if (vap->iv_state != IEEE80211_S_RUN) { 1984 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1985 wh, NULL, "wrong state %s", 1986 ieee80211_state_name[vap->iv_state]); 1987 vap->iv_stats.is_rx_mgtdiscard++; 1988 return; 1989 } 1990 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1991 /* frame must be directed */ 1992 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1993 wh, NULL, "%s", "not unicast"); 1994 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1995 return; 1996 } 1997 /* 1998 * prreq frame format 1999 * [tlv] ssid 2000 * [tlv] supported rates 2001 * [tlv] extended supported rates 2002 * [tlv] mesh id 2003 */ 2004 ssid = meshid = rates = xrates = NULL; 2005 while (efrm - frm > 1) { 2006 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2007 switch (*frm) { 2008 case IEEE80211_ELEMID_SSID: 2009 ssid = frm; 2010 break; 2011 case IEEE80211_ELEMID_RATES: 2012 rates = frm; 2013 break; 2014 case IEEE80211_ELEMID_XRATES: 2015 xrates = frm; 2016 break; 2017 case IEEE80211_ELEMID_MESHID: 2018 meshid = frm; 2019 break; 2020 } 2021 frm += frm[1] + 2; 2022 } 2023 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2024 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2025 if (xrates != NULL) 2026 IEEE80211_VERIFY_ELEMENT(xrates, 2027 IEEE80211_RATE_MAXSIZE - rates[1], return); 2028 if (meshid != NULL) { 2029 IEEE80211_VERIFY_ELEMENT(meshid, 2030 IEEE80211_MESHID_LEN, return); 2031 /* NB: meshid, not ssid */ 2032 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2033 } 2034 2035 /* XXX find a better class or define it's own */ 2036 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2037 "%s", "recv probe req"); 2038 /* 2039 * Some legacy 11b clients cannot hack a complete 2040 * probe response frame. When the request includes 2041 * only a bare-bones rate set, communicate this to 2042 * the transmit side. 2043 */ 2044 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2045 break; 2046 } 2047 2048 case IEEE80211_FC0_SUBTYPE_ACTION: 2049 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2050 if (ni == vap->iv_bss) { 2051 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2052 wh, NULL, "%s", "unknown node"); 2053 vap->iv_stats.is_rx_mgtdiscard++; 2054 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2055 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2056 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2057 wh, NULL, "%s", "not for us"); 2058 vap->iv_stats.is_rx_mgtdiscard++; 2059 } else if (vap->iv_state != IEEE80211_S_RUN) { 2060 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2061 wh, NULL, "wrong state %s", 2062 ieee80211_state_name[vap->iv_state]); 2063 vap->iv_stats.is_rx_mgtdiscard++; 2064 } else { 2065 if (ieee80211_parse_action(ni, m0) == 0) 2066 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2067 } 2068 break; 2069 2070 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2071 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2072 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2073 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2074 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 2075 case IEEE80211_FC0_SUBTYPE_ATIM: 2076 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2077 case IEEE80211_FC0_SUBTYPE_AUTH: 2078 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2079 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2080 wh, NULL, "%s", "not handled"); 2081 vap->iv_stats.is_rx_mgtdiscard++; 2082 break; 2083 2084 default: 2085 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2086 wh, "mgt", "subtype 0x%x not handled", subtype); 2087 vap->iv_stats.is_rx_badsubtype++; 2088 break; 2089 } 2090 } 2091 2092 static void 2093 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2094 { 2095 2096 switch (subtype) { 2097 case IEEE80211_FC0_SUBTYPE_BAR: 2098 ieee80211_recv_bar(ni, m); 2099 break; 2100 } 2101 } 2102 2103 /* 2104 * Parse meshpeering action ie's for MPM frames 2105 */ 2106 static const struct ieee80211_meshpeer_ie * 2107 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2108 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2109 const uint8_t *frm, const uint8_t *efrm, 2110 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2111 { 2112 struct ieee80211vap *vap = ni->ni_vap; 2113 const struct ieee80211_meshpeer_ie *mpie; 2114 uint16_t args[3]; 2115 const uint8_t *meshid, *meshconf; 2116 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2117 2118 meshid = meshconf = NULL; 2119 while (efrm - frm > 1) { 2120 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2121 switch (*frm) { 2122 case IEEE80211_ELEMID_MESHID: 2123 meshid = frm; 2124 break; 2125 case IEEE80211_ELEMID_MESHCONF: 2126 meshconf = frm; 2127 break; 2128 case IEEE80211_ELEMID_MESHPEER: 2129 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2130 memset(mp, 0, sizeof(*mp)); 2131 mp->peer_len = mpie->peer_len; 2132 mp->peer_proto = le16dec(&mpie->peer_proto); 2133 mp->peer_llinkid = le16dec(&mpie->peer_llinkid); 2134 switch (subtype) { 2135 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2136 mp->peer_linkid = 2137 le16dec(&mpie->peer_linkid); 2138 break; 2139 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2140 /* NB: peer link ID is optional */ 2141 if (mpie->peer_len == 2142 (IEEE80211_MPM_BASE_SZ + 2)) { 2143 mp->peer_linkid = 0; 2144 mp->peer_rcode = 2145 le16dec(&mpie->peer_linkid); 2146 } else { 2147 mp->peer_linkid = 2148 le16dec(&mpie->peer_linkid); 2149 mp->peer_rcode = 2150 le16dec(&mpie->peer_rcode); 2151 } 2152 break; 2153 } 2154 break; 2155 } 2156 frm += frm[1] + 2; 2157 } 2158 2159 /* 2160 * Verify the contents of the frame. 2161 * If it fails validation, close the peer link. 2162 */ 2163 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2164 sendclose = 1; 2165 IEEE80211_DISCARD(vap, 2166 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2167 wh, NULL, "%s", "MPM validation failed"); 2168 } 2169 2170 /* If meshid is not the same reject any frames type. */ 2171 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2172 sendclose = 1; 2173 IEEE80211_DISCARD(vap, 2174 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2175 wh, NULL, "%s", "not for our mesh"); 2176 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2177 /* 2178 * Standard not clear about this, if we dont ignore 2179 * there will be an endless loop between nodes sending 2180 * CLOSE frames between each other with wrong meshid. 2181 * Discard and timers will bring FSM to IDLE state. 2182 */ 2183 return NULL; 2184 } 2185 } 2186 2187 /* 2188 * Close frames are accepted if meshid is the same. 2189 * Verify the other two types. 2190 */ 2191 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2192 mesh_verify_meshconf(vap, meshconf)) { 2193 sendclose = 1; 2194 IEEE80211_DISCARD(vap, 2195 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2196 wh, NULL, "%s", "configuration missmatch"); 2197 } 2198 2199 if (sendclose) { 2200 vap->iv_stats.is_rx_mgtdiscard++; 2201 switch (ni->ni_mlstate) { 2202 case IEEE80211_NODE_MESH_IDLE: 2203 case IEEE80211_NODE_MESH_ESTABLISHED: 2204 case IEEE80211_NODE_MESH_HOLDING: 2205 /* ignore */ 2206 break; 2207 case IEEE80211_NODE_MESH_OPENSNT: 2208 case IEEE80211_NODE_MESH_OPENRCV: 2209 case IEEE80211_NODE_MESH_CONFIRMRCV: 2210 args[0] = ni->ni_mlpid; 2211 args[1] = ni->ni_mllid; 2212 /* Reason codes for rejection */ 2213 switch (subtype) { 2214 case IEEE80211_ACTION_MESHPEERING_OPEN: 2215 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2216 break; 2217 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2218 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2219 break; 2220 } 2221 ieee80211_send_action(ni, 2222 IEEE80211_ACTION_CAT_SELF_PROT, 2223 IEEE80211_ACTION_MESHPEERING_CLOSE, 2224 args); 2225 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2226 mesh_peer_timeout_setup(ni); 2227 break; 2228 } 2229 return NULL; 2230 } 2231 2232 return (const struct ieee80211_meshpeer_ie *) mp; 2233 } 2234 2235 static int 2236 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2237 const struct ieee80211_frame *wh, 2238 const uint8_t *frm, const uint8_t *efrm) 2239 { 2240 struct ieee80211vap *vap = ni->ni_vap; 2241 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2242 struct ieee80211_meshpeer_ie ie; 2243 const struct ieee80211_meshpeer_ie *meshpeer; 2244 uint16_t args[3]; 2245 2246 /* +2+2 for action + code + capabilites */ 2247 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2248 IEEE80211_ACTION_MESHPEERING_OPEN); 2249 if (meshpeer == NULL) { 2250 return 0; 2251 } 2252 2253 /* XXX move up */ 2254 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2255 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2256 2257 switch (ni->ni_mlstate) { 2258 case IEEE80211_NODE_MESH_IDLE: 2259 /* Reject open request if reached our maximum neighbor count */ 2260 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2261 args[0] = meshpeer->peer_llinkid; 2262 args[1] = 0; 2263 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2264 ieee80211_send_action(ni, 2265 IEEE80211_ACTION_CAT_SELF_PROT, 2266 IEEE80211_ACTION_MESHPEERING_CLOSE, 2267 args); 2268 /* stay in IDLE state */ 2269 return (0); 2270 } 2271 /* Open frame accepted */ 2272 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2273 ni->ni_mllid = meshpeer->peer_llinkid; 2274 ni->ni_mlpid = mesh_generateid(vap); 2275 if (ni->ni_mlpid == 0) 2276 return 0; /* XXX */ 2277 args[0] = ni->ni_mlpid; 2278 /* Announce we're open too... */ 2279 ieee80211_send_action(ni, 2280 IEEE80211_ACTION_CAT_SELF_PROT, 2281 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2282 /* ...and confirm the link. */ 2283 args[0] = ni->ni_mlpid; 2284 args[1] = ni->ni_mllid; 2285 ieee80211_send_action(ni, 2286 IEEE80211_ACTION_CAT_SELF_PROT, 2287 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2288 args); 2289 mesh_peer_timeout_setup(ni); 2290 break; 2291 case IEEE80211_NODE_MESH_OPENRCV: 2292 /* Wrong Link ID */ 2293 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2294 args[0] = ni->ni_mllid; 2295 args[1] = ni->ni_mlpid; 2296 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2297 ieee80211_send_action(ni, 2298 IEEE80211_ACTION_CAT_SELF_PROT, 2299 IEEE80211_ACTION_MESHPEERING_CLOSE, 2300 args); 2301 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2302 mesh_peer_timeout_setup(ni); 2303 break; 2304 } 2305 /* Duplicate open, confirm again. */ 2306 args[0] = ni->ni_mlpid; 2307 args[1] = ni->ni_mllid; 2308 ieee80211_send_action(ni, 2309 IEEE80211_ACTION_CAT_SELF_PROT, 2310 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2311 args); 2312 break; 2313 case IEEE80211_NODE_MESH_OPENSNT: 2314 ni->ni_mllid = meshpeer->peer_llinkid; 2315 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2316 args[0] = ni->ni_mlpid; 2317 args[1] = ni->ni_mllid; 2318 ieee80211_send_action(ni, 2319 IEEE80211_ACTION_CAT_SELF_PROT, 2320 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2321 args); 2322 /* NB: don't setup/clear any timeout */ 2323 break; 2324 case IEEE80211_NODE_MESH_CONFIRMRCV: 2325 if (ni->ni_mlpid != meshpeer->peer_linkid || 2326 ni->ni_mllid != meshpeer->peer_llinkid) { 2327 args[0] = ni->ni_mlpid; 2328 args[1] = ni->ni_mllid; 2329 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2330 ieee80211_send_action(ni, 2331 IEEE80211_ACTION_CAT_SELF_PROT, 2332 IEEE80211_ACTION_MESHPEERING_CLOSE, 2333 args); 2334 mesh_linkchange(ni, 2335 IEEE80211_NODE_MESH_HOLDING); 2336 mesh_peer_timeout_setup(ni); 2337 break; 2338 } 2339 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2340 ni->ni_mllid = meshpeer->peer_llinkid; 2341 args[0] = ni->ni_mlpid; 2342 args[1] = ni->ni_mllid; 2343 ieee80211_send_action(ni, 2344 IEEE80211_ACTION_CAT_SELF_PROT, 2345 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2346 args); 2347 mesh_peer_timeout_stop(ni); 2348 break; 2349 case IEEE80211_NODE_MESH_ESTABLISHED: 2350 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2351 args[0] = ni->ni_mllid; 2352 args[1] = ni->ni_mlpid; 2353 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2354 ieee80211_send_action(ni, 2355 IEEE80211_ACTION_CAT_SELF_PROT, 2356 IEEE80211_ACTION_MESHPEERING_CLOSE, 2357 args); 2358 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2359 mesh_peer_timeout_setup(ni); 2360 break; 2361 } 2362 args[0] = ni->ni_mlpid; 2363 args[1] = ni->ni_mllid; 2364 ieee80211_send_action(ni, 2365 IEEE80211_ACTION_CAT_SELF_PROT, 2366 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2367 args); 2368 break; 2369 case IEEE80211_NODE_MESH_HOLDING: 2370 args[0] = ni->ni_mlpid; 2371 args[1] = meshpeer->peer_llinkid; 2372 /* Standard not clear about what the reaason code should be */ 2373 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2374 ieee80211_send_action(ni, 2375 IEEE80211_ACTION_CAT_SELF_PROT, 2376 IEEE80211_ACTION_MESHPEERING_CLOSE, 2377 args); 2378 break; 2379 } 2380 return 0; 2381 } 2382 2383 static int 2384 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2385 const struct ieee80211_frame *wh, 2386 const uint8_t *frm, const uint8_t *efrm) 2387 { 2388 struct ieee80211vap *vap = ni->ni_vap; 2389 struct ieee80211_meshpeer_ie ie; 2390 const struct ieee80211_meshpeer_ie *meshpeer; 2391 uint16_t args[3]; 2392 2393 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2394 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2395 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2396 if (meshpeer == NULL) { 2397 return 0; 2398 } 2399 2400 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2401 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2402 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2403 2404 switch (ni->ni_mlstate) { 2405 case IEEE80211_NODE_MESH_OPENRCV: 2406 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2407 mesh_peer_timeout_stop(ni); 2408 break; 2409 case IEEE80211_NODE_MESH_OPENSNT: 2410 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2411 mesh_peer_timeout_setup(ni); 2412 break; 2413 case IEEE80211_NODE_MESH_HOLDING: 2414 args[0] = ni->ni_mlpid; 2415 args[1] = meshpeer->peer_llinkid; 2416 /* Standard not clear about what the reaason code should be */ 2417 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2418 ieee80211_send_action(ni, 2419 IEEE80211_ACTION_CAT_SELF_PROT, 2420 IEEE80211_ACTION_MESHPEERING_CLOSE, 2421 args); 2422 break; 2423 case IEEE80211_NODE_MESH_CONFIRMRCV: 2424 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2425 args[0] = ni->ni_mlpid; 2426 args[1] = ni->ni_mllid; 2427 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2428 ieee80211_send_action(ni, 2429 IEEE80211_ACTION_CAT_SELF_PROT, 2430 IEEE80211_ACTION_MESHPEERING_CLOSE, 2431 args); 2432 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2433 mesh_peer_timeout_setup(ni); 2434 } 2435 break; 2436 default: 2437 IEEE80211_DISCARD(vap, 2438 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2439 wh, NULL, "received confirm in invalid state %d", 2440 ni->ni_mlstate); 2441 vap->iv_stats.is_rx_mgtdiscard++; 2442 break; 2443 } 2444 return 0; 2445 } 2446 2447 static int 2448 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2449 const struct ieee80211_frame *wh, 2450 const uint8_t *frm, const uint8_t *efrm) 2451 { 2452 struct ieee80211_meshpeer_ie ie; 2453 const struct ieee80211_meshpeer_ie *meshpeer; 2454 uint16_t args[3]; 2455 2456 /* +2 for action + code */ 2457 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2458 IEEE80211_ACTION_MESHPEERING_CLOSE); 2459 if (meshpeer == NULL) { 2460 return 0; 2461 } 2462 2463 /* 2464 * XXX: check reason code, for example we could receive 2465 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2466 * to peer again. 2467 */ 2468 2469 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2470 ni, "%s", "recv PEER CLOSE"); 2471 2472 switch (ni->ni_mlstate) { 2473 case IEEE80211_NODE_MESH_IDLE: 2474 /* ignore */ 2475 break; 2476 case IEEE80211_NODE_MESH_OPENRCV: 2477 case IEEE80211_NODE_MESH_OPENSNT: 2478 case IEEE80211_NODE_MESH_CONFIRMRCV: 2479 case IEEE80211_NODE_MESH_ESTABLISHED: 2480 args[0] = ni->ni_mlpid; 2481 args[1] = ni->ni_mllid; 2482 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2483 ieee80211_send_action(ni, 2484 IEEE80211_ACTION_CAT_SELF_PROT, 2485 IEEE80211_ACTION_MESHPEERING_CLOSE, 2486 args); 2487 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2488 mesh_peer_timeout_setup(ni); 2489 break; 2490 case IEEE80211_NODE_MESH_HOLDING: 2491 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2492 mesh_peer_timeout_stop(ni); 2493 break; 2494 } 2495 return 0; 2496 } 2497 2498 /* 2499 * Link Metric handling. 2500 */ 2501 static int 2502 mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2503 const struct ieee80211_frame *wh, 2504 const uint8_t *frm, const uint8_t *efrm) 2505 { 2506 const struct ieee80211_meshlmetric_ie *ie = 2507 (const struct ieee80211_meshlmetric_ie *) 2508 (frm+2); /* action + code */ 2509 struct ieee80211_meshlmetric_ie lm_rep; 2510 2511 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2512 lm_rep.lm_flags = 0; 2513 lm_rep.lm_metric = mesh_airtime_calc(ni); 2514 ieee80211_send_action(ni, 2515 IEEE80211_ACTION_CAT_MESH, 2516 IEEE80211_ACTION_MESH_LMETRIC, 2517 &lm_rep); 2518 } 2519 /* XXX: else do nothing for now */ 2520 return 0; 2521 } 2522 2523 /* 2524 * Parse meshgate action ie's for GANN frames. 2525 * Returns -1 if parsing fails, otherwise 0. 2526 */ 2527 static int 2528 mesh_parse_meshgate_action(struct ieee80211_node *ni, 2529 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2530 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2531 { 2532 struct ieee80211vap *vap = ni->ni_vap; 2533 const struct ieee80211_meshgann_ie *gannie; 2534 2535 while (efrm - frm > 1) { 2536 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2537 switch (*frm) { 2538 case IEEE80211_ELEMID_MESHGANN: 2539 gannie = (const struct ieee80211_meshgann_ie *) frm; 2540 memset(ie, 0, sizeof(*ie)); 2541 ie->gann_ie = gannie->gann_ie; 2542 ie->gann_len = gannie->gann_len; 2543 ie->gann_flags = gannie->gann_flags; 2544 ie->gann_hopcount = gannie->gann_hopcount; 2545 ie->gann_ttl = gannie->gann_ttl; 2546 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2547 ie->gann_seq = le32dec(&gannie->gann_seq); 2548 ie->gann_interval = le16dec(&gannie->gann_interval); 2549 break; 2550 } 2551 frm += frm[1] + 2; 2552 } 2553 2554 return 0; 2555 } 2556 2557 /* 2558 * Mesh Gate Announcement handling. 2559 */ 2560 static int 2561 mesh_recv_action_meshgate(struct ieee80211_node *ni, 2562 const struct ieee80211_frame *wh, 2563 const uint8_t *frm, const uint8_t *efrm) 2564 { 2565 struct ieee80211vap *vap = ni->ni_vap; 2566 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2567 struct ieee80211_mesh_gate_route *gr, *next; 2568 struct ieee80211_mesh_route *rt_gate; 2569 struct ieee80211_meshgann_ie pgann; 2570 struct ieee80211_meshgann_ie ie; 2571 int found = 0; 2572 2573 /* +2 for action + code */ 2574 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2575 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2576 ni->ni_macaddr, NULL, "%s", 2577 "GANN parsing failed"); 2578 vap->iv_stats.is_rx_mgtdiscard++; 2579 return (0); 2580 } 2581 2582 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2583 return 0; 2584 2585 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2586 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2587 ie.gann_seq); 2588 2589 if (ms == NULL) 2590 return (0); 2591 MESH_RT_LOCK(ms); 2592 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2593 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2594 continue; 2595 if (ie.gann_seq <= gr->gr_lastseq) { 2596 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2597 ni->ni_macaddr, NULL, 2598 "GANN old seqno %u <= %u", 2599 ie.gann_seq, gr->gr_lastseq); 2600 MESH_RT_UNLOCK(ms); 2601 return (0); 2602 } 2603 /* corresponding mesh gate found & GANN accepted */ 2604 found = 1; 2605 break; 2606 2607 } 2608 if (found == 0) { 2609 /* this GANN is from a new mesh Gate add it to known table. */ 2610 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2611 "stored new GANN information, seq %u.", ie.gann_seq); 2612 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2613 M_80211_MESH_GT_RT, 2614 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2615 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2616 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2617 } 2618 gr->gr_lastseq = ie.gann_seq; 2619 2620 /* check if we have a path to this gate */ 2621 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2622 if (rt_gate != NULL && 2623 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2624 gr->gr_route = rt_gate; 2625 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2626 } 2627 2628 MESH_RT_UNLOCK(ms); 2629 2630 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2631 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2632 return 0; 2633 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2634 pgann.gann_hopcount = ie.gann_hopcount + 1; 2635 pgann.gann_ttl = ie.gann_ttl - 1; 2636 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2637 pgann.gann_seq = ie.gann_seq; 2638 pgann.gann_interval = ie.gann_interval; 2639 2640 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2641 "%s", "propagate GANN"); 2642 2643 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2644 IEEE80211_ACTION_MESH_GANN, &pgann); 2645 2646 return 0; 2647 } 2648 2649 static int 2650 mesh_send_action(struct ieee80211_node *ni, 2651 const uint8_t sa[IEEE80211_ADDR_LEN], 2652 const uint8_t da[IEEE80211_ADDR_LEN], 2653 struct mbuf *m) 2654 { 2655 struct ieee80211vap *vap = ni->ni_vap; 2656 struct ieee80211com *ic = ni->ni_ic; 2657 struct ieee80211_bpf_params params; 2658 int ret; 2659 2660 KASSERT(ni != NULL, ("null node")); 2661 2662 if (vap->iv_state == IEEE80211_S_CAC) { 2663 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2664 "block %s frame in CAC state", "Mesh action"); 2665 vap->iv_stats.is_tx_badstate++; 2666 ieee80211_free_node(ni); 2667 m_freem(m); 2668 return EIO; /* XXX */ 2669 } 2670 2671 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2672 if (m == NULL) { 2673 ieee80211_free_node(ni); 2674 return ENOMEM; 2675 } 2676 2677 IEEE80211_TX_LOCK(ic); 2678 ieee80211_send_setup(ni, m, 2679 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2680 IEEE80211_NONQOS_TID, sa, da, sa); 2681 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2682 2683 memset(¶ms, 0, sizeof(params)); 2684 params.ibp_pri = WME_AC_VO; 2685 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2686 if (IEEE80211_IS_MULTICAST(da)) 2687 params.ibp_try0 = 1; 2688 else 2689 params.ibp_try0 = ni->ni_txparms->maxretry; 2690 params.ibp_power = ni->ni_txpower; 2691 2692 IEEE80211_NODE_STAT(ni, tx_mgmt); 2693 2694 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2695 IEEE80211_TX_UNLOCK(ic); 2696 return (ret); 2697 } 2698 2699 #define ADDSHORT(frm, v) do { \ 2700 frm[0] = (v) & 0xff; \ 2701 frm[1] = (v) >> 8; \ 2702 frm += 2; \ 2703 } while (0) 2704 #define ADDWORD(frm, v) do { \ 2705 frm[0] = (v) & 0xff; \ 2706 frm[1] = ((v) >> 8) & 0xff; \ 2707 frm[2] = ((v) >> 16) & 0xff; \ 2708 frm[3] = ((v) >> 24) & 0xff; \ 2709 frm += 4; \ 2710 } while (0) 2711 2712 static int 2713 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2714 int category, int action, void *args0) 2715 { 2716 struct ieee80211vap *vap = ni->ni_vap; 2717 struct ieee80211com *ic = ni->ni_ic; 2718 uint16_t *args = args0; 2719 const struct ieee80211_rateset *rs; 2720 struct mbuf *m; 2721 uint8_t *frm; 2722 2723 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2724 "send PEER OPEN action: localid 0x%x", args[0]); 2725 2726 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2727 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2728 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2729 ieee80211_ref_node(ni); 2730 2731 m = ieee80211_getmgtframe(&frm, 2732 ic->ic_headroom + sizeof(struct ieee80211_frame), 2733 sizeof(uint16_t) /* action+category */ 2734 + sizeof(uint16_t) /* capabilites */ 2735 + 2 + IEEE80211_RATE_SIZE 2736 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2737 + 2 + IEEE80211_MESHID_LEN 2738 + sizeof(struct ieee80211_meshconf_ie) 2739 + sizeof(struct ieee80211_meshpeer_ie) 2740 ); 2741 if (m != NULL) { 2742 /* 2743 * mesh peer open action frame format: 2744 * [1] category 2745 * [1] action 2746 * [2] capabilities 2747 * [tlv] rates 2748 * [tlv] xrates 2749 * [tlv] mesh id 2750 * [tlv] mesh conf 2751 * [tlv] mesh peer link mgmt 2752 */ 2753 *frm++ = category; 2754 *frm++ = action; 2755 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2756 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2757 frm = ieee80211_add_rates(frm, rs); 2758 frm = ieee80211_add_xrates(frm, rs); 2759 frm = ieee80211_add_meshid(frm, vap); 2760 frm = ieee80211_add_meshconf(frm, vap); 2761 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2762 args[0], 0, 0); 2763 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2764 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2765 } else { 2766 vap->iv_stats.is_tx_nobuf++; 2767 ieee80211_free_node(ni); 2768 return ENOMEM; 2769 } 2770 } 2771 2772 static int 2773 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2774 int category, int action, void *args0) 2775 { 2776 struct ieee80211vap *vap = ni->ni_vap; 2777 struct ieee80211com *ic = ni->ni_ic; 2778 uint16_t *args = args0; 2779 const struct ieee80211_rateset *rs; 2780 struct mbuf *m; 2781 uint8_t *frm; 2782 2783 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2784 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2785 args[0], args[1]); 2786 2787 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2788 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2789 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2790 ieee80211_ref_node(ni); 2791 2792 m = ieee80211_getmgtframe(&frm, 2793 ic->ic_headroom + sizeof(struct ieee80211_frame), 2794 sizeof(uint16_t) /* action+category */ 2795 + sizeof(uint16_t) /* capabilites */ 2796 + sizeof(uint16_t) /* status code */ 2797 + sizeof(uint16_t) /* AID */ 2798 + 2 + IEEE80211_RATE_SIZE 2799 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2800 + 2 + IEEE80211_MESHID_LEN 2801 + sizeof(struct ieee80211_meshconf_ie) 2802 + sizeof(struct ieee80211_meshpeer_ie) 2803 ); 2804 if (m != NULL) { 2805 /* 2806 * mesh peer confirm action frame format: 2807 * [1] category 2808 * [1] action 2809 * [2] capabilities 2810 * [2] status code 2811 * [2] association id (peer ID) 2812 * [tlv] rates 2813 * [tlv] xrates 2814 * [tlv] mesh id 2815 * [tlv] mesh conf 2816 * [tlv] mesh peer link mgmt 2817 */ 2818 *frm++ = category; 2819 *frm++ = action; 2820 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2821 ADDSHORT(frm, 0); /* status code */ 2822 ADDSHORT(frm, args[1]); /* AID */ 2823 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2824 frm = ieee80211_add_rates(frm, rs); 2825 frm = ieee80211_add_xrates(frm, rs); 2826 frm = ieee80211_add_meshid(frm, vap); 2827 frm = ieee80211_add_meshconf(frm, vap); 2828 frm = ieee80211_add_meshpeer(frm, 2829 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2830 args[0], args[1], 0); 2831 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2832 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2833 } else { 2834 vap->iv_stats.is_tx_nobuf++; 2835 ieee80211_free_node(ni); 2836 return ENOMEM; 2837 } 2838 } 2839 2840 static int 2841 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2842 int category, int action, void *args0) 2843 { 2844 struct ieee80211vap *vap = ni->ni_vap; 2845 struct ieee80211com *ic = ni->ni_ic; 2846 uint16_t *args = args0; 2847 struct mbuf *m; 2848 uint8_t *frm; 2849 2850 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2851 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)", 2852 args[0], args[1], args[2], ieee80211_reason_to_string(args[2])); 2853 2854 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2855 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2856 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2857 ieee80211_ref_node(ni); 2858 2859 m = ieee80211_getmgtframe(&frm, 2860 ic->ic_headroom + sizeof(struct ieee80211_frame), 2861 sizeof(uint16_t) /* action+category */ 2862 + sizeof(uint16_t) /* reason code */ 2863 + 2 + IEEE80211_MESHID_LEN 2864 + sizeof(struct ieee80211_meshpeer_ie) 2865 ); 2866 if (m != NULL) { 2867 /* 2868 * mesh peer close action frame format: 2869 * [1] category 2870 * [1] action 2871 * [tlv] mesh id 2872 * [tlv] mesh peer link mgmt 2873 */ 2874 *frm++ = category; 2875 *frm++ = action; 2876 frm = ieee80211_add_meshid(frm, vap); 2877 frm = ieee80211_add_meshpeer(frm, 2878 IEEE80211_ACTION_MESHPEERING_CLOSE, 2879 args[0], args[1], args[2]); 2880 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2881 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2882 } else { 2883 vap->iv_stats.is_tx_nobuf++; 2884 ieee80211_free_node(ni); 2885 return ENOMEM; 2886 } 2887 } 2888 2889 static int 2890 mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2891 int category, int action, void *arg0) 2892 { 2893 struct ieee80211vap *vap = ni->ni_vap; 2894 struct ieee80211com *ic = ni->ni_ic; 2895 struct ieee80211_meshlmetric_ie *ie = arg0; 2896 struct mbuf *m; 2897 uint8_t *frm; 2898 2899 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2900 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2901 ni, "%s", "send LINK METRIC REQUEST action"); 2902 } else { 2903 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2904 ni, "send LINK METRIC REPLY action: metric 0x%x", 2905 ie->lm_metric); 2906 } 2907 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2908 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2909 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2910 ieee80211_ref_node(ni); 2911 2912 m = ieee80211_getmgtframe(&frm, 2913 ic->ic_headroom + sizeof(struct ieee80211_frame), 2914 sizeof(uint16_t) + /* action+category */ 2915 sizeof(struct ieee80211_meshlmetric_ie) 2916 ); 2917 if (m != NULL) { 2918 /* 2919 * mesh link metric 2920 * [1] category 2921 * [1] action 2922 * [tlv] mesh link metric 2923 */ 2924 *frm++ = category; 2925 *frm++ = action; 2926 frm = ieee80211_add_meshlmetric(frm, 2927 ie->lm_flags, ie->lm_metric); 2928 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2929 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2930 } else { 2931 vap->iv_stats.is_tx_nobuf++; 2932 ieee80211_free_node(ni); 2933 return ENOMEM; 2934 } 2935 } 2936 2937 static int 2938 mesh_send_action_meshgate(struct ieee80211_node *ni, 2939 int category, int action, void *arg0) 2940 { 2941 struct ieee80211vap *vap = ni->ni_vap; 2942 struct ieee80211com *ic = ni->ni_ic; 2943 struct ieee80211_meshgann_ie *ie = arg0; 2944 struct mbuf *m; 2945 uint8_t *frm; 2946 2947 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2948 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2949 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2950 ieee80211_ref_node(ni); 2951 2952 m = ieee80211_getmgtframe(&frm, 2953 ic->ic_headroom + sizeof(struct ieee80211_frame), 2954 sizeof(uint16_t) + /* action+category */ 2955 IEEE80211_MESHGANN_BASE_SZ 2956 ); 2957 if (m != NULL) { 2958 /* 2959 * mesh link metric 2960 * [1] category 2961 * [1] action 2962 * [tlv] mesh gate annoucement 2963 */ 2964 *frm++ = category; 2965 *frm++ = action; 2966 frm = ieee80211_add_meshgate(frm, ie); 2967 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2968 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 2969 } else { 2970 vap->iv_stats.is_tx_nobuf++; 2971 ieee80211_free_node(ni); 2972 return ENOMEM; 2973 } 2974 } 2975 2976 static void 2977 mesh_peer_timeout_setup(struct ieee80211_node *ni) 2978 { 2979 switch (ni->ni_mlstate) { 2980 case IEEE80211_NODE_MESH_HOLDING: 2981 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 2982 break; 2983 case IEEE80211_NODE_MESH_CONFIRMRCV: 2984 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 2985 break; 2986 case IEEE80211_NODE_MESH_IDLE: 2987 ni->ni_mltval = 0; 2988 break; 2989 default: 2990 ni->ni_mltval = ieee80211_mesh_retrytimeout; 2991 break; 2992 } 2993 if (ni->ni_mltval) 2994 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2995 mesh_peer_timeout_cb, ni); 2996 } 2997 2998 /* 2999 * Same as above but backoffs timer statisically 50%. 3000 */ 3001 static void 3002 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3003 { 3004 uint32_t r; 3005 3006 r = arc4random(); 3007 ni->ni_mltval += r % ni->ni_mltval; 3008 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3009 ni); 3010 } 3011 3012 static __inline void 3013 mesh_peer_timeout_stop(struct ieee80211_node *ni) 3014 { 3015 callout_drain(&ni->ni_mltimer); 3016 } 3017 3018 static void 3019 mesh_peer_backoff_cb(void *arg) 3020 { 3021 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3022 3023 /* After backoff timeout, try to peer automatically again. */ 3024 ni->ni_mlhcnt = 0; 3025 } 3026 3027 /* 3028 * Mesh Peer Link Management FSM timeout handling. 3029 */ 3030 static void 3031 mesh_peer_timeout_cb(void *arg) 3032 { 3033 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3034 uint16_t args[3]; 3035 3036 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3037 ni, "mesh link timeout, state %d, retry counter %d", 3038 ni->ni_mlstate, ni->ni_mlrcnt); 3039 3040 switch (ni->ni_mlstate) { 3041 case IEEE80211_NODE_MESH_IDLE: 3042 case IEEE80211_NODE_MESH_ESTABLISHED: 3043 break; 3044 case IEEE80211_NODE_MESH_OPENSNT: 3045 case IEEE80211_NODE_MESH_OPENRCV: 3046 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3047 args[0] = ni->ni_mlpid; 3048 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3049 ieee80211_send_action(ni, 3050 IEEE80211_ACTION_CAT_SELF_PROT, 3051 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3052 ni->ni_mlrcnt = 0; 3053 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3054 mesh_peer_timeout_setup(ni); 3055 } else { 3056 args[0] = ni->ni_mlpid; 3057 ieee80211_send_action(ni, 3058 IEEE80211_ACTION_CAT_SELF_PROT, 3059 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3060 ni->ni_mlrcnt++; 3061 mesh_peer_timeout_backoff(ni); 3062 } 3063 break; 3064 case IEEE80211_NODE_MESH_CONFIRMRCV: 3065 args[0] = ni->ni_mlpid; 3066 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3067 ieee80211_send_action(ni, 3068 IEEE80211_ACTION_CAT_SELF_PROT, 3069 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3070 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3071 mesh_peer_timeout_setup(ni); 3072 break; 3073 case IEEE80211_NODE_MESH_HOLDING: 3074 ni->ni_mlhcnt++; 3075 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3076 callout_reset(&ni->ni_mlhtimer, 3077 ieee80211_mesh_backofftimeout, 3078 mesh_peer_backoff_cb, ni); 3079 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3080 break; 3081 } 3082 } 3083 3084 static int 3085 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3086 { 3087 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3088 3089 if (ie == NULL || ie[1] != ms->ms_idlen) 3090 return 1; 3091 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3092 } 3093 3094 /* 3095 * Check if we are using the same algorithms for this mesh. 3096 */ 3097 static int 3098 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3099 { 3100 const struct ieee80211_meshconf_ie *meshconf = 3101 (const struct ieee80211_meshconf_ie *) ie; 3102 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3103 3104 if (meshconf == NULL) 3105 return 1; 3106 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3107 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3108 "unknown path selection algorithm: 0x%x\n", 3109 meshconf->conf_pselid); 3110 return 1; 3111 } 3112 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3113 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3114 "unknown path metric algorithm: 0x%x\n", 3115 meshconf->conf_pmetid); 3116 return 1; 3117 } 3118 if (meshconf->conf_ccid != 0) { 3119 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3120 "unknown congestion control algorithm: 0x%x\n", 3121 meshconf->conf_ccid); 3122 return 1; 3123 } 3124 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3125 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3126 "unknown sync algorithm: 0x%x\n", 3127 meshconf->conf_syncid); 3128 return 1; 3129 } 3130 if (meshconf->conf_authid != 0) { 3131 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3132 "unknown auth auth algorithm: 0x%x\n", 3133 meshconf->conf_pselid); 3134 return 1; 3135 } 3136 /* Not accepting peers */ 3137 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3138 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3139 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3140 return 1; 3141 } 3142 return 0; 3143 } 3144 3145 static int 3146 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3147 const uint8_t *ie) 3148 { 3149 const struct ieee80211_meshpeer_ie *meshpeer = 3150 (const struct ieee80211_meshpeer_ie *) ie; 3151 3152 if (meshpeer == NULL || 3153 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3154 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3155 return 1; 3156 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3157 IEEE80211_DPRINTF(vap, 3158 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3159 "Only MPM protocol is supported (proto: 0x%02X)", 3160 meshpeer->peer_proto); 3161 return 1; 3162 } 3163 switch (subtype) { 3164 case IEEE80211_ACTION_MESHPEERING_OPEN: 3165 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3166 return 1; 3167 break; 3168 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3169 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3170 return 1; 3171 break; 3172 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3173 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3174 return 1; 3175 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3176 meshpeer->peer_linkid != 0) 3177 return 1; 3178 if (meshpeer->peer_rcode == 0) 3179 return 1; 3180 break; 3181 } 3182 return 0; 3183 } 3184 3185 /* 3186 * Add a Mesh ID IE to a frame. 3187 */ 3188 uint8_t * 3189 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3190 { 3191 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3192 3193 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3194 3195 *frm++ = IEEE80211_ELEMID_MESHID; 3196 *frm++ = ms->ms_idlen; 3197 memcpy(frm, ms->ms_id, ms->ms_idlen); 3198 return frm + ms->ms_idlen; 3199 } 3200 3201 /* 3202 * Add a Mesh Configuration IE to a frame. 3203 * For now just use HWMP routing, Airtime link metric, Null Congestion 3204 * Signaling, Null Sync Protocol and Null Authentication. 3205 */ 3206 uint8_t * 3207 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3208 { 3209 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3210 uint16_t caps; 3211 3212 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3213 3214 *frm++ = IEEE80211_ELEMID_MESHCONF; 3215 *frm++ = IEEE80211_MESH_CONF_SZ; 3216 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3217 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3218 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3219 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3220 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3221 /* NB: set the number of neighbors before the rest */ 3222 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3223 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3224 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3225 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3226 frm += 1; 3227 caps = 0; 3228 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3229 caps |= IEEE80211_MESHCONF_CAP_AP; 3230 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3231 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3232 *frm++ = caps; 3233 return frm; 3234 } 3235 3236 /* 3237 * Add a Mesh Peer Management IE to a frame. 3238 */ 3239 uint8_t * 3240 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3241 uint16_t peerid, uint16_t reason) 3242 { 3243 3244 KASSERT(localid != 0, ("localid == 0")); 3245 3246 *frm++ = IEEE80211_ELEMID_MESHPEER; 3247 switch (subtype) { 3248 case IEEE80211_ACTION_MESHPEERING_OPEN: 3249 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3250 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3251 ADDSHORT(frm, localid); /* local ID */ 3252 break; 3253 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3254 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3255 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3256 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3257 ADDSHORT(frm, localid); /* local ID */ 3258 ADDSHORT(frm, peerid); /* peer ID */ 3259 break; 3260 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3261 if (peerid) 3262 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3263 else 3264 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3265 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3266 ADDSHORT(frm, localid); /* local ID */ 3267 if (peerid) 3268 ADDSHORT(frm, peerid); /* peer ID */ 3269 ADDSHORT(frm, reason); 3270 break; 3271 } 3272 return frm; 3273 } 3274 3275 /* 3276 * Compute an Airtime Link Metric for the link with this node. 3277 * 3278 * Based on Draft 3.0 spec (11B.10, p.149). 3279 */ 3280 /* 3281 * Max 802.11s overhead. 3282 */ 3283 #define IEEE80211_MESH_MAXOVERHEAD \ 3284 (sizeof(struct ieee80211_qosframe_addr4) \ 3285 + sizeof(struct ieee80211_meshcntl_ae10) \ 3286 + sizeof(struct llc) \ 3287 + IEEE80211_ADDR_LEN \ 3288 + IEEE80211_WEP_IVLEN \ 3289 + IEEE80211_WEP_KIDLEN \ 3290 + IEEE80211_WEP_CRCLEN \ 3291 + IEEE80211_WEP_MICLEN \ 3292 + IEEE80211_CRC_LEN) 3293 uint32_t 3294 mesh_airtime_calc(struct ieee80211_node *ni) 3295 { 3296 #define M_BITS 8 3297 #define S_FACTOR (2 * M_BITS) 3298 struct ieee80211com *ic = ni->ni_ic; 3299 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3300 const static int nbits = 8192 << M_BITS; 3301 uint32_t overhead, rate, errrate; 3302 uint64_t res; 3303 3304 /* Time to transmit a frame */ 3305 rate = ni->ni_txrate; 3306 overhead = ieee80211_compute_duration(ic->ic_rt, 3307 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3308 /* Error rate in percentage */ 3309 /* XXX assuming small failures are ok */ 3310 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + 3311 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) 3312 / 100; 3313 res = (overhead + (nbits / rate)) * 3314 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3315 3316 return (uint32_t)(res >> S_FACTOR); 3317 #undef M_BITS 3318 #undef S_FACTOR 3319 } 3320 3321 /* 3322 * Add a Mesh Link Metric report IE to a frame. 3323 */ 3324 uint8_t * 3325 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3326 { 3327 *frm++ = IEEE80211_ELEMID_MESHLINK; 3328 *frm++ = 5; 3329 *frm++ = flags; 3330 ADDWORD(frm, metric); 3331 return frm; 3332 } 3333 3334 /* 3335 * Add a Mesh Gate Announcement IE to a frame. 3336 */ 3337 uint8_t * 3338 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3339 { 3340 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3341 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3342 *frm++ = ie->gann_flags; 3343 *frm++ = ie->gann_hopcount; 3344 *frm++ = ie->gann_ttl; 3345 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3346 frm += 6; 3347 ADDWORD(frm, ie->gann_seq); 3348 ADDSHORT(frm, ie->gann_interval); 3349 return frm; 3350 } 3351 #undef ADDSHORT 3352 #undef ADDWORD 3353 3354 /* 3355 * Initialize any mesh-specific node state. 3356 */ 3357 void 3358 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3359 { 3360 ni->ni_flags |= IEEE80211_NODE_QOS; 3361 callout_init(&ni->ni_mltimer, 1); 3362 callout_init(&ni->ni_mlhtimer, 1); 3363 } 3364 3365 /* 3366 * Cleanup any mesh-specific node state. 3367 */ 3368 void 3369 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3370 { 3371 struct ieee80211vap *vap = ni->ni_vap; 3372 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3373 3374 callout_drain(&ni->ni_mltimer); 3375 callout_drain(&ni->ni_mlhtimer); 3376 /* NB: short-circuit callbacks after mesh_vdetach */ 3377 if (vap->iv_mesh != NULL) 3378 ms->ms_ppath->mpp_peerdown(ni); 3379 } 3380 3381 void 3382 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3383 { 3384 ni->ni_meshidlen = ie[1]; 3385 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3386 } 3387 3388 /* 3389 * Setup mesh-specific node state on neighbor discovery. 3390 */ 3391 void 3392 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3393 const struct ieee80211_frame *wh, 3394 const struct ieee80211_scanparams *sp) 3395 { 3396 ieee80211_parse_meshid(ni, sp->meshid); 3397 } 3398 3399 void 3400 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3401 struct ieee80211_beacon_offsets *bo) 3402 { 3403 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3404 3405 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3406 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3407 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3408 } 3409 } 3410 3411 static int 3412 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3413 { 3414 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3415 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3416 struct ieee80211_mesh_route *rt; 3417 struct ieee80211req_mesh_route *imr; 3418 size_t len, off; 3419 uint8_t *p; 3420 int error; 3421 3422 if (vap->iv_opmode != IEEE80211_M_MBSS) 3423 return ENOSYS; 3424 3425 error = 0; 3426 switch (ireq->i_type) { 3427 case IEEE80211_IOC_MESH_ID: 3428 ireq->i_len = ms->ms_idlen; 3429 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3430 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3431 break; 3432 case IEEE80211_IOC_MESH_AP: 3433 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3434 break; 3435 case IEEE80211_IOC_MESH_FWRD: 3436 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3437 break; 3438 case IEEE80211_IOC_MESH_GATE: 3439 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3440 break; 3441 case IEEE80211_IOC_MESH_TTL: 3442 ireq->i_val = ms->ms_ttl; 3443 break; 3444 case IEEE80211_IOC_MESH_RTCMD: 3445 switch (ireq->i_val) { 3446 case IEEE80211_MESH_RTCMD_LIST: 3447 len = 0; 3448 MESH_RT_LOCK(ms); 3449 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3450 len += sizeof(*imr); 3451 } 3452 MESH_RT_UNLOCK(ms); 3453 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3454 ireq->i_len = len; 3455 return ENOMEM; 3456 } 3457 ireq->i_len = len; 3458 /* XXX M_WAIT? */ 3459 p = IEEE80211_MALLOC(len, M_TEMP, 3460 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 3461 if (p == NULL) 3462 return ENOMEM; 3463 off = 0; 3464 MESH_RT_LOCK(ms); 3465 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3466 if (off >= len) 3467 break; 3468 imr = (struct ieee80211req_mesh_route *) 3469 (p + off); 3470 IEEE80211_ADDR_COPY(imr->imr_dest, 3471 rt->rt_dest); 3472 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3473 rt->rt_nexthop); 3474 imr->imr_metric = rt->rt_metric; 3475 imr->imr_nhops = rt->rt_nhops; 3476 imr->imr_lifetime = 3477 ieee80211_mesh_rt_update(rt, 0); 3478 imr->imr_lastmseq = rt->rt_lastmseq; 3479 imr->imr_flags = rt->rt_flags; /* last */ 3480 off += sizeof(*imr); 3481 } 3482 MESH_RT_UNLOCK(ms); 3483 error = copyout(p, (uint8_t *)ireq->i_data, 3484 ireq->i_len); 3485 IEEE80211_FREE(p, M_TEMP); 3486 break; 3487 case IEEE80211_MESH_RTCMD_FLUSH: 3488 case IEEE80211_MESH_RTCMD_ADD: 3489 case IEEE80211_MESH_RTCMD_DELETE: 3490 return EINVAL; 3491 default: 3492 return ENOSYS; 3493 } 3494 break; 3495 case IEEE80211_IOC_MESH_PR_METRIC: 3496 len = strlen(ms->ms_pmetric->mpm_descr); 3497 if (ireq->i_len < len) 3498 return EINVAL; 3499 ireq->i_len = len; 3500 error = copyout(ms->ms_pmetric->mpm_descr, 3501 (uint8_t *)ireq->i_data, len); 3502 break; 3503 case IEEE80211_IOC_MESH_PR_PATH: 3504 len = strlen(ms->ms_ppath->mpp_descr); 3505 if (ireq->i_len < len) 3506 return EINVAL; 3507 ireq->i_len = len; 3508 error = copyout(ms->ms_ppath->mpp_descr, 3509 (uint8_t *)ireq->i_data, len); 3510 break; 3511 default: 3512 return ENOSYS; 3513 } 3514 3515 return error; 3516 } 3517 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3518 3519 static int 3520 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3521 { 3522 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3523 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3524 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3525 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3526 int error; 3527 3528 if (vap->iv_opmode != IEEE80211_M_MBSS) 3529 return ENOSYS; 3530 3531 error = 0; 3532 switch (ireq->i_type) { 3533 case IEEE80211_IOC_MESH_ID: 3534 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3535 return EINVAL; 3536 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3537 if (error != 0) 3538 break; 3539 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3540 ms->ms_idlen = ireq->i_len; 3541 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3542 error = ENETRESET; 3543 break; 3544 case IEEE80211_IOC_MESH_AP: 3545 if (ireq->i_val) 3546 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3547 else 3548 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3549 error = ENETRESET; 3550 break; 3551 case IEEE80211_IOC_MESH_FWRD: 3552 if (ireq->i_val) 3553 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3554 else 3555 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3556 mesh_gatemode_setup(vap); 3557 break; 3558 case IEEE80211_IOC_MESH_GATE: 3559 if (ireq->i_val) 3560 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3561 else 3562 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3563 break; 3564 case IEEE80211_IOC_MESH_TTL: 3565 ms->ms_ttl = (uint8_t) ireq->i_val; 3566 break; 3567 case IEEE80211_IOC_MESH_RTCMD: 3568 switch (ireq->i_val) { 3569 case IEEE80211_MESH_RTCMD_LIST: 3570 return EINVAL; 3571 case IEEE80211_MESH_RTCMD_FLUSH: 3572 ieee80211_mesh_rt_flush(vap); 3573 break; 3574 case IEEE80211_MESH_RTCMD_ADD: 3575 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3576 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3577 return EINVAL; 3578 error = copyin(ireq->i_data, &tmpaddr, 3579 IEEE80211_ADDR_LEN); 3580 if (error == 0) 3581 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3582 break; 3583 case IEEE80211_MESH_RTCMD_DELETE: 3584 ieee80211_mesh_rt_del(vap, ireq->i_data); 3585 break; 3586 default: 3587 return ENOSYS; 3588 } 3589 break; 3590 case IEEE80211_IOC_MESH_PR_METRIC: 3591 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3592 if (error == 0) { 3593 error = mesh_select_proto_metric(vap, tmpproto); 3594 if (error == 0) 3595 error = ENETRESET; 3596 } 3597 break; 3598 case IEEE80211_IOC_MESH_PR_PATH: 3599 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3600 if (error == 0) { 3601 error = mesh_select_proto_path(vap, tmpproto); 3602 if (error == 0) 3603 error = ENETRESET; 3604 } 3605 break; 3606 default: 3607 return ENOSYS; 3608 } 3609 return error; 3610 } 3611 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3612