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 <netproto/802_11/ieee80211_var.h> 63 #include <netproto/802_11/ieee80211_action.h> 64 #ifdef IEEE80211_SUPPORT_SUPERG 65 #include <netproto/802_11/ieee80211_superg.h> 66 #endif 67 #include <netproto/802_11/ieee80211_input.h> 68 #include <netproto/802_11/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 = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_route)) + 207 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_INTWAIT | M_ZERO); 208 if (rt != NULL) { 209 rt->rt_vap = vap; 210 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 211 rt->rt_priv = (void *)ALIGN(&rt[1]); 212 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT"); 213 callout_init_mp(&rt->rt_discovery); 214 rt->rt_updtime = ticks; /* create time */ 215 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 216 } 217 return rt; 218 } 219 220 struct ieee80211_mesh_route * 221 ieee80211_mesh_rt_find(struct ieee80211vap *vap, 222 const uint8_t dest[IEEE80211_ADDR_LEN]) 223 { 224 struct ieee80211_mesh_state *ms = vap->iv_mesh; 225 struct ieee80211_mesh_route *rt; 226 227 MESH_RT_LOCK(ms); 228 rt = mesh_rt_find_locked(ms, dest); 229 MESH_RT_UNLOCK(ms); 230 return rt; 231 } 232 233 struct ieee80211_mesh_route * 234 ieee80211_mesh_rt_add(struct ieee80211vap *vap, 235 const uint8_t dest[IEEE80211_ADDR_LEN]) 236 { 237 struct ieee80211_mesh_state *ms = vap->iv_mesh; 238 struct ieee80211_mesh_route *rt; 239 240 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 241 ("%s: duplicate entry in the routing table", __func__)); 242 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 243 ("%s: adding self to the routing table", __func__)); 244 245 MESH_RT_LOCK(ms); 246 rt = mesh_rt_add_locked(vap, dest); 247 MESH_RT_UNLOCK(ms); 248 return rt; 249 } 250 251 /* 252 * Update the route lifetime and returns the updated lifetime. 253 * If new_lifetime is zero and route is timedout it will be invalidated. 254 * new_lifetime is in msec 255 */ 256 int 257 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 258 { 259 int timesince, now; 260 uint32_t lifetime = 0; 261 262 KASSERT(rt != NULL, ("route is NULL")); 263 264 now = ticks; 265 MESH_RT_ENTRY_LOCK(rt); 266 267 /* dont clobber a proxy entry gated by us */ 268 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 269 MESH_RT_ENTRY_UNLOCK(rt); 270 return rt->rt_lifetime; 271 } 272 273 timesince = ticks_to_msecs(now - rt->rt_updtime); 274 rt->rt_updtime = now; 275 if (timesince >= rt->rt_lifetime) { 276 if (new_lifetime != 0) { 277 rt->rt_lifetime = new_lifetime; 278 } 279 else { 280 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 281 rt->rt_lifetime = 0; 282 } 283 } else { 284 /* update what is left of lifetime */ 285 rt->rt_lifetime = rt->rt_lifetime - timesince; 286 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 287 new_lifetime, rt->rt_lifetime); 288 } 289 lifetime = rt->rt_lifetime; 290 MESH_RT_ENTRY_UNLOCK(rt); 291 292 return lifetime; 293 } 294 295 /* 296 * Add a proxy route (as needed) for the specified destination. 297 */ 298 void 299 ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 300 const uint8_t dest[IEEE80211_ADDR_LEN]) 301 { 302 struct ieee80211_mesh_state *ms = vap->iv_mesh; 303 struct ieee80211_mesh_route *rt; 304 305 MESH_RT_LOCK(ms); 306 rt = mesh_rt_find_locked(ms, dest); 307 if (rt == NULL) { 308 rt = mesh_rt_add_locked(vap, dest); 309 if (rt == NULL) { 310 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 311 "%s", "unable to add proxy entry"); 312 vap->iv_stats.is_mesh_rtaddfailed++; 313 } else { 314 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 315 "%s", "add proxy entry"); 316 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 317 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 318 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 319 | IEEE80211_MESHRT_FLAGS_PROXY; 320 } 321 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 322 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 323 ("no proxy flag for poxy entry")); 324 struct ieee80211com *ic = vap->iv_ic; 325 /* 326 * Fix existing entry created by received frames from 327 * stations that have some memory of dest. We also 328 * flush any frames held on the staging queue; delivering 329 * them is too much trouble right now. 330 */ 331 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 332 "%s", "fix proxy entry"); 333 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 334 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 335 | IEEE80211_MESHRT_FLAGS_PROXY; 336 /* XXX belongs in hwmp */ 337 ieee80211_ageq_drain_node(&ic->ic_stageq, 338 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 339 /* XXX stat? */ 340 } 341 MESH_RT_UNLOCK(ms); 342 } 343 344 static __inline void 345 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 346 { 347 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 348 /* 349 * Grab the lock before destroying it, to be sure no one else 350 * is holding the route. 351 */ 352 MESH_RT_ENTRY_LOCK(rt); 353 callout_drain(&rt->rt_discovery); 354 MESH_RT_ENTRY_LOCK_DESTROY(rt); 355 kfree(rt, M_80211_MESH_RT); 356 } 357 358 void 359 ieee80211_mesh_rt_del(struct ieee80211vap *vap, 360 const uint8_t dest[IEEE80211_ADDR_LEN]) 361 { 362 struct ieee80211_mesh_state *ms = vap->iv_mesh; 363 struct ieee80211_mesh_route *rt, *next; 364 365 MESH_RT_LOCK(ms); 366 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 367 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 368 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 369 ms->ms_ppath->mpp_senderror(vap, dest, rt, 370 IEEE80211_REASON_MESH_PERR_NO_PROXY); 371 } else { 372 ms->ms_ppath->mpp_senderror(vap, dest, rt, 373 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 374 } 375 mesh_rt_del(ms, rt); 376 MESH_RT_UNLOCK(ms); 377 return; 378 } 379 } 380 MESH_RT_UNLOCK(ms); 381 } 382 383 void 384 ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 385 { 386 struct ieee80211_mesh_state *ms = vap->iv_mesh; 387 struct ieee80211_mesh_route *rt, *next; 388 389 if (ms == NULL) 390 return; 391 MESH_RT_LOCK(ms); 392 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 393 mesh_rt_del(ms, rt); 394 MESH_RT_UNLOCK(ms); 395 } 396 397 void 398 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 399 const uint8_t peer[IEEE80211_ADDR_LEN]) 400 { 401 struct ieee80211_mesh_state *ms = vap->iv_mesh; 402 struct ieee80211_mesh_route *rt, *next; 403 404 MESH_RT_LOCK(ms); 405 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 406 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 407 mesh_rt_del(ms, rt); 408 } 409 MESH_RT_UNLOCK(ms); 410 } 411 412 /* 413 * Flush expired routing entries, i.e. those in invalid state for 414 * some time. 415 */ 416 static void 417 mesh_rt_flush_invalid(struct ieee80211vap *vap) 418 { 419 struct ieee80211_mesh_state *ms = vap->iv_mesh; 420 struct ieee80211_mesh_route *rt, *next; 421 422 if (ms == NULL) 423 return; 424 MESH_RT_LOCK(ms); 425 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 426 /* Discover paths will be deleted by their own callout */ 427 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 428 continue; 429 ieee80211_mesh_rt_update(rt, 0); 430 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 431 mesh_rt_del(ms, rt); 432 } 433 MESH_RT_UNLOCK(ms); 434 } 435 436 #define N(a) (sizeof(a) / sizeof(a[0])) 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 < N(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 < N(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 < N(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 < N(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 #undef N 506 507 static void 508 mesh_gatemode_setup(struct ieee80211vap *vap) 509 { 510 struct ieee80211_mesh_state *ms = vap->iv_mesh; 511 512 /* 513 * NB: When a mesh gate is running as a ROOT it shall 514 * not send out periodic GANNs but instead mark the 515 * mesh gate flag for the corresponding proactive PREQ 516 * and RANN frames. 517 */ 518 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 519 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 520 callout_drain(&ms->ms_gatetimer); 521 return ; 522 } 523 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 524 mesh_gatemode_cb, vap); 525 } 526 527 static void 528 mesh_gatemode_cb(void *arg) 529 { 530 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 531 struct ieee80211_mesh_state *ms = vap->iv_mesh; 532 struct ieee80211_meshgann_ie gann; 533 534 gann.gann_flags = 0; /* Reserved */ 535 gann.gann_hopcount = 0; 536 gann.gann_ttl = ms->ms_ttl; 537 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 538 gann.gann_seq = ms->ms_gateseq++; 539 gann.gann_interval = ieee80211_mesh_gateint; 540 541 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 542 "send broadcast GANN (seq %u)", gann.gann_seq); 543 544 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 545 IEEE80211_ACTION_MESH_GANN, &gann); 546 mesh_gatemode_setup(vap); 547 } 548 549 static void 550 ieee80211_mesh_init(void) 551 { 552 553 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 554 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 555 556 /* 557 * Setup mesh parameters that depends on the clock frequency. 558 */ 559 ieee80211_mesh_gateint = msecs_to_ticks(10000); 560 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 561 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 562 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 563 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 564 565 /* 566 * Register action frame handlers. 567 */ 568 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 569 IEEE80211_ACTION_MESHPEERING_OPEN, 570 mesh_recv_action_meshpeering_open); 571 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 572 IEEE80211_ACTION_MESHPEERING_CONFIRM, 573 mesh_recv_action_meshpeering_confirm); 574 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 575 IEEE80211_ACTION_MESHPEERING_CLOSE, 576 mesh_recv_action_meshpeering_close); 577 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 578 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 579 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 580 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 581 582 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 583 IEEE80211_ACTION_MESHPEERING_OPEN, 584 mesh_send_action_meshpeering_open); 585 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 586 IEEE80211_ACTION_MESHPEERING_CONFIRM, 587 mesh_send_action_meshpeering_confirm); 588 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 589 IEEE80211_ACTION_MESHPEERING_CLOSE, 590 mesh_send_action_meshpeering_close); 591 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 592 IEEE80211_ACTION_MESH_LMETRIC, 593 mesh_send_action_meshlmetric); 594 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 595 IEEE80211_ACTION_MESH_GANN, 596 mesh_send_action_meshgate); 597 598 /* 599 * Register Airtime Link Metric. 600 */ 601 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 602 603 } 604 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 605 606 void 607 ieee80211_mesh_attach(struct ieee80211com *ic) 608 { 609 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 610 } 611 612 void 613 ieee80211_mesh_detach(struct ieee80211com *ic) 614 { 615 } 616 617 static void 618 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 619 { 620 struct ieee80211com *ic = ni->ni_ic; 621 uint16_t args[3]; 622 623 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 624 args[0] = ni->ni_mlpid; 625 args[1] = ni->ni_mllid; 626 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 627 ieee80211_send_action(ni, 628 IEEE80211_ACTION_CAT_SELF_PROT, 629 IEEE80211_ACTION_MESHPEERING_CLOSE, 630 args); 631 } 632 callout_drain(&ni->ni_mltimer); 633 /* XXX belongs in hwmp */ 634 ieee80211_ageq_drain_node(&ic->ic_stageq, 635 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 636 } 637 638 static void 639 mesh_vdetach(struct ieee80211vap *vap) 640 { 641 struct ieee80211_mesh_state *ms = vap->iv_mesh; 642 643 callout_drain(&ms->ms_cleantimer); 644 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 645 NULL); 646 ieee80211_mesh_rt_flush(vap); 647 MESH_RT_LOCK_DESTROY(ms); 648 ms->ms_ppath->mpp_vdetach(vap); 649 kfree(vap->iv_mesh, M_80211_VAP); 650 vap->iv_mesh = NULL; 651 } 652 653 static void 654 mesh_vattach(struct ieee80211vap *vap) 655 { 656 struct ieee80211_mesh_state *ms; 657 vap->iv_newstate = mesh_newstate; 658 vap->iv_input = mesh_input; 659 vap->iv_opdetach = mesh_vdetach; 660 vap->iv_recv_mgmt = mesh_recv_mgmt; 661 vap->iv_recv_ctl = mesh_recv_ctl; 662 ms = kmalloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 663 M_INTWAIT | M_ZERO); 664 if (ms == NULL) { 665 kprintf("%s: couldn't alloc MBSS state\n", __func__); 666 return; 667 } 668 vap->iv_mesh = ms; 669 ms->ms_seq = 0; 670 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 671 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 672 TAILQ_INIT(&ms->ms_known_gates); 673 TAILQ_INIT(&ms->ms_routes); 674 MESH_RT_LOCK_INIT(ms, "MBSS"); 675 callout_init_mp(&ms->ms_cleantimer); 676 callout_init_mp(&ms->ms_gatetimer); 677 ms->ms_gateseq = 0; 678 mesh_select_proto_metric(vap, "AIRTIME"); 679 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 680 mesh_select_proto_path(vap, "HWMP"); 681 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 682 ms->ms_ppath->mpp_vattach(vap); 683 } 684 685 /* 686 * IEEE80211_M_MBSS vap state machine handler. 687 */ 688 static int 689 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 690 { 691 struct ieee80211_mesh_state *ms = vap->iv_mesh; 692 struct ieee80211com *ic = vap->iv_ic; 693 struct ieee80211_node *ni; 694 enum ieee80211_state ostate; 695 696 IEEE80211_LOCK_ASSERT(ic); 697 698 ostate = vap->iv_state; 699 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 700 __func__, ieee80211_state_name[ostate], 701 ieee80211_state_name[nstate], arg); 702 vap->iv_state = nstate; /* state transition */ 703 if (ostate != IEEE80211_S_SCAN) 704 ieee80211_cancel_scan(vap); /* background scan */ 705 ni = vap->iv_bss; /* NB: no reference held */ 706 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 707 callout_drain(&ms->ms_cleantimer); 708 callout_drain(&ms->ms_gatetimer); 709 } 710 switch (nstate) { 711 case IEEE80211_S_INIT: 712 switch (ostate) { 713 case IEEE80211_S_SCAN: 714 ieee80211_cancel_scan(vap); 715 break; 716 case IEEE80211_S_CAC: 717 ieee80211_dfs_cac_stop(vap); 718 break; 719 case IEEE80211_S_RUN: 720 ieee80211_iterate_nodes(&ic->ic_sta, 721 mesh_vdetach_peers, NULL); 722 break; 723 default: 724 break; 725 } 726 if (ostate != IEEE80211_S_INIT) { 727 /* NB: optimize INIT -> INIT case */ 728 ieee80211_reset_bss(vap); 729 ieee80211_mesh_rt_flush(vap); 730 } 731 break; 732 case IEEE80211_S_SCAN: 733 switch (ostate) { 734 case IEEE80211_S_INIT: 735 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 736 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 737 ms->ms_idlen != 0) { 738 /* 739 * Already have a channel and a mesh ID; bypass 740 * the scan and startup immediately. 741 */ 742 ieee80211_create_ibss(vap, vap->iv_des_chan); 743 break; 744 } 745 /* 746 * Initiate a scan. We can come here as a result 747 * of an IEEE80211_IOC_SCAN_REQ too in which case 748 * the vap will be marked with IEEE80211_FEXT_SCANREQ 749 * and the scan request parameters will be present 750 * in iv_scanreq. Otherwise we do the default. 751 */ 752 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 753 ieee80211_check_scan(vap, 754 vap->iv_scanreq_flags, 755 vap->iv_scanreq_duration, 756 vap->iv_scanreq_mindwell, 757 vap->iv_scanreq_maxdwell, 758 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 759 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 760 } else 761 ieee80211_check_scan_current(vap); 762 break; 763 default: 764 break; 765 } 766 break; 767 case IEEE80211_S_CAC: 768 /* 769 * Start CAC on a DFS channel. We come here when starting 770 * a bss on a DFS channel (see ieee80211_create_ibss). 771 */ 772 ieee80211_dfs_cac_start(vap); 773 break; 774 case IEEE80211_S_RUN: 775 switch (ostate) { 776 case IEEE80211_S_INIT: 777 /* 778 * Already have a channel; bypass the 779 * scan and startup immediately. 780 * Note that ieee80211_create_ibss will call 781 * back to do a RUN->RUN state change. 782 */ 783 ieee80211_create_ibss(vap, 784 ieee80211_ht_adjust_channel(ic, 785 ic->ic_curchan, vap->iv_flags_ht)); 786 /* NB: iv_bss is changed on return */ 787 break; 788 case IEEE80211_S_CAC: 789 /* 790 * NB: This is the normal state change when CAC 791 * expires and no radar was detected; no need to 792 * clear the CAC timer as it's already expired. 793 */ 794 /* fall thru... */ 795 case IEEE80211_S_CSA: 796 #if 0 797 /* 798 * Shorten inactivity timer of associated stations 799 * to weed out sta's that don't follow a CSA. 800 */ 801 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 802 #endif 803 /* 804 * Update bss node channel to reflect where 805 * we landed after CSA. 806 */ 807 ieee80211_node_set_chan(vap->iv_bss, 808 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 809 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 810 /* XXX bypass debug msgs */ 811 break; 812 case IEEE80211_S_SCAN: 813 case IEEE80211_S_RUN: 814 #ifdef IEEE80211_DEBUG 815 if (ieee80211_msg_debug(vap)) { 816 struct ieee80211_node *ni = vap->iv_bss; 817 ieee80211_note(vap, 818 "synchronized with %s meshid ", 819 ether_sprintf(ni->ni_meshid)); 820 ieee80211_print_essid(ni->ni_meshid, 821 ni->ni_meshidlen); 822 /* XXX MCS/HT */ 823 kprintf(" channel %d\n", 824 ieee80211_chan2ieee(ic, ic->ic_curchan)); 825 } 826 #endif 827 break; 828 default: 829 break; 830 } 831 ieee80211_node_authorize(vap->iv_bss); 832 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 833 mesh_rt_cleanup_cb, vap); 834 mesh_gatemode_setup(vap); 835 break; 836 default: 837 break; 838 } 839 /* NB: ostate not nstate */ 840 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 841 return 0; 842 } 843 844 static void 845 mesh_rt_cleanup_cb(void *arg) 846 { 847 struct ieee80211vap *vap = arg; 848 struct ieee80211_mesh_state *ms = vap->iv_mesh; 849 850 mesh_rt_flush_invalid(vap); 851 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 852 mesh_rt_cleanup_cb, vap); 853 } 854 855 /* 856 * Mark a mesh STA as gate and return a pointer to it. 857 * If this is first time, we create a new gate route. 858 * Always update the path route to this mesh gate. 859 */ 860 struct ieee80211_mesh_gate_route * 861 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 862 struct ieee80211_mesh_route *rt) 863 { 864 struct ieee80211_mesh_state *ms = vap->iv_mesh; 865 struct ieee80211_mesh_gate_route *gr = NULL, *next; 866 int found = 0; 867 868 MESH_RT_LOCK(ms); 869 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 870 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 871 found = 1; 872 break; 873 } 874 } 875 876 if (!found) { 877 /* New mesh gate add it to known table. */ 878 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 879 "%s", "stored new gate information from pro-PREQ."); 880 gr = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 881 M_80211_MESH_GT_RT, M_INTWAIT | M_ZERO); 882 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 883 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 884 } 885 gr->gr_route = rt; 886 /* TODO: link from path route to gate route */ 887 MESH_RT_UNLOCK(ms); 888 889 return gr; 890 } 891 892 893 /* 894 * Helper function to note the Mesh Peer Link FSM change. 895 */ 896 static void 897 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 898 { 899 struct ieee80211vap *vap = ni->ni_vap; 900 struct ieee80211_mesh_state *ms = vap->iv_mesh; 901 #ifdef IEEE80211_DEBUG 902 static const char *meshlinkstates[] = { 903 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 904 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 905 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 906 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 907 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 908 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 909 }; 910 #endif 911 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 912 ni, "peer link: %s -> %s", 913 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 914 915 /* track neighbor count */ 916 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 917 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 918 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 919 ms->ms_neighbors++; 920 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 921 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 922 state != IEEE80211_NODE_MESH_ESTABLISHED) { 923 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 924 ms->ms_neighbors--; 925 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 926 } 927 ni->ni_mlstate = state; 928 switch (state) { 929 case IEEE80211_NODE_MESH_HOLDING: 930 ms->ms_ppath->mpp_peerdown(ni); 931 break; 932 case IEEE80211_NODE_MESH_ESTABLISHED: 933 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 934 break; 935 default: 936 break; 937 } 938 } 939 940 /* 941 * Helper function to generate a unique local ID required for mesh 942 * peer establishment. 943 */ 944 static void 945 mesh_checkid(void *arg, struct ieee80211_node *ni) 946 { 947 uint16_t *r = arg; 948 949 if (*r == ni->ni_mllid) 950 *(uint16_t *)arg = 0; 951 } 952 953 static uint32_t 954 mesh_generateid(struct ieee80211vap *vap) 955 { 956 int maxiter = 4; 957 uint16_t r; 958 959 do { 960 get_random_bytes(&r, 2); 961 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 962 maxiter--; 963 } while (r == 0 && maxiter > 0); 964 return r; 965 } 966 967 /* 968 * Verifies if we already received this packet by checking its 969 * sequence number. 970 * Returns 0 if the frame is to be accepted, 1 otherwise. 971 */ 972 static int 973 mesh_checkpseq(struct ieee80211vap *vap, 974 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 975 { 976 struct ieee80211_mesh_route *rt; 977 978 rt = ieee80211_mesh_rt_find(vap, source); 979 if (rt == NULL) { 980 rt = ieee80211_mesh_rt_add(vap, source); 981 if (rt == NULL) { 982 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 983 "%s", "add mcast route failed"); 984 vap->iv_stats.is_mesh_rtaddfailed++; 985 return 1; 986 } 987 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 988 "add mcast route, mesh seqno %d", seq); 989 rt->rt_lastmseq = seq; 990 return 0; 991 } 992 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 993 return 1; 994 } else { 995 rt->rt_lastmseq = seq; 996 return 0; 997 } 998 } 999 1000 /* 1001 * Iterate the routing table and locate the next hop. 1002 */ 1003 struct ieee80211_node * 1004 ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1005 const uint8_t dest[IEEE80211_ADDR_LEN]) 1006 { 1007 struct ieee80211_mesh_route *rt; 1008 1009 rt = ieee80211_mesh_rt_find(vap, dest); 1010 if (rt == NULL) 1011 return NULL; 1012 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1013 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1014 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1015 /* XXX stat */ 1016 return NULL; 1017 } 1018 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1019 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1020 if (rt == NULL) return NULL; 1021 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1022 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1023 "%s: meshgate !valid, flags 0x%x", __func__, 1024 rt->rt_flags); 1025 /* XXX stat */ 1026 return NULL; 1027 } 1028 } 1029 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1030 } 1031 1032 static void 1033 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1034 struct ieee80211_mesh_route *rt_gate) 1035 { 1036 struct ifnet *ifp = vap->iv_ifp; 1037 struct ieee80211_node *ni; 1038 1039 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1040 1041 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1042 if (ni == NULL) { 1043 IFNET_STAT_INC(ifp, oerrors, 1); 1044 m_freem(m); 1045 return; 1046 } 1047 1048 /* 1049 * Send through the VAP packet transmit path. 1050 * This consumes the node ref grabbed above and 1051 * the mbuf, regardless of whether there's a problem 1052 * or not. 1053 */ 1054 (void) ieee80211_vap_pkt_send_dest(vap, m, ni); 1055 } 1056 1057 /* 1058 * Forward the queued frames to known valid mesh gates. 1059 * Assume destination to be outside the MBSS (i.e. proxy entry), 1060 * If no valid mesh gates are known silently discard queued frames. 1061 * After transmitting frames to all known valid mesh gates, this route 1062 * will be marked invalid, and a new path discovery will happen in the hopes 1063 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1064 */ 1065 void 1066 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1067 struct ieee80211_mesh_route *rt_dest) 1068 { 1069 struct ieee80211com *ic = vap->iv_ic; 1070 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1071 struct ieee80211_mesh_route *rt_gate; 1072 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1073 struct mbuf *m, *mcopy, *next; 1074 1075 IEEE80211_TX_UNLOCK_ASSERT(ic); 1076 1077 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1078 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1079 1080 /* XXX: send to more than one valid mash gate */ 1081 MESH_RT_LOCK(ms); 1082 1083 m = ieee80211_ageq_remove(&ic->ic_stageq, 1084 (struct ieee80211_node *)(uintptr_t) 1085 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1086 1087 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1088 rt_gate = gr->gr_route; 1089 if (rt_gate == NULL) { 1090 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1091 rt_dest->rt_dest, 1092 "mesh gate with no path %s", 1093 ether_sprintf(gr->gr_addr)); 1094 continue; 1095 } 1096 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1097 continue; 1098 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1099 ("route not marked as a mesh gate")); 1100 KASSERT((rt_gate->rt_flags & 1101 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1102 ("found mesh gate that is also marked porxy")); 1103 /* 1104 * convert route to a proxy route gated by the current 1105 * mesh gate, this is needed so encap can built data 1106 * frame with correct address. 1107 */ 1108 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1109 IEEE80211_MESHRT_FLAGS_VALID; 1110 rt_dest->rt_ext_seq = 1; /* random value */ 1111 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1112 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1113 rt_dest->rt_metric = rt_gate->rt_metric; 1114 rt_dest->rt_nhops = rt_gate->rt_nhops; 1115 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1116 MESH_RT_UNLOCK(ms); 1117 /* XXX: lock?? */ 1118 mcopy = m_dup(m, M_NOWAIT); 1119 for (; mcopy != NULL; mcopy = next) { 1120 next = mcopy->m_nextpkt; 1121 mcopy->m_nextpkt = NULL; 1122 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1123 rt_dest->rt_dest, 1124 "flush queued frame %p len %d", mcopy, 1125 mcopy->m_pkthdr.len); 1126 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1127 } 1128 MESH_RT_LOCK(ms); 1129 } 1130 rt_dest->rt_flags = 0; /* Mark invalid */ 1131 m_freem(m); 1132 MESH_RT_UNLOCK(ms); 1133 } 1134 1135 /* 1136 * Forward the specified frame. 1137 * Decrement the TTL and set TA to our MAC address. 1138 */ 1139 static void 1140 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1141 const struct ieee80211_meshcntl *mc) 1142 { 1143 struct ieee80211com *ic = vap->iv_ic; 1144 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1145 struct ifnet *ifp = vap->iv_ifp; 1146 const struct ieee80211_frame *wh = 1147 mtod(m, const struct ieee80211_frame *); 1148 struct mbuf *mcopy; 1149 struct ieee80211_meshcntl *mccopy; 1150 struct ieee80211_frame *whcopy; 1151 struct ieee80211_node *ni; 1152 int err; 1153 1154 /* This is called from the RX path - don't hold this lock */ 1155 IEEE80211_TX_UNLOCK_ASSERT(ic); 1156 1157 /* 1158 * mesh ttl of 1 means we are the last one receving it, 1159 * according to amendment we decrement and then check if 1160 * 0, if so we dont forward. 1161 */ 1162 if (mc->mc_ttl < 1) { 1163 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1164 "%s", "frame not fwd'd, ttl 1"); 1165 vap->iv_stats.is_mesh_fwd_ttl++; 1166 return; 1167 } 1168 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1169 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1170 "%s", "frame not fwd'd, fwding disabled"); 1171 vap->iv_stats.is_mesh_fwd_disabled++; 1172 return; 1173 } 1174 mcopy = m_dup(m, M_NOWAIT); 1175 if (mcopy == NULL) { 1176 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1177 "%s", "frame not fwd'd, cannot dup"); 1178 vap->iv_stats.is_mesh_fwd_nobuf++; 1179 IFNET_STAT_INC(ifp, oerrors, 1); 1180 return; 1181 } 1182 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1183 sizeof(struct ieee80211_meshcntl)); 1184 if (mcopy == NULL) { 1185 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1186 "%s", "frame not fwd'd, too short"); 1187 vap->iv_stats.is_mesh_fwd_tooshort++; 1188 IFNET_STAT_INC(ifp, oerrors, 1); 1189 m_freem(mcopy); 1190 return; 1191 } 1192 whcopy = mtod(mcopy, struct ieee80211_frame *); 1193 mccopy = (struct ieee80211_meshcntl *) 1194 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1195 /* XXX clear other bits? */ 1196 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1197 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1198 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1199 ni = ieee80211_ref_node(vap->iv_bss); 1200 mcopy->m_flags |= M_MCAST; 1201 } else { 1202 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1203 if (ni == NULL) { 1204 /* 1205 * [Optional] any of the following three actions: 1206 * o silently discard 1207 * o trigger a path discovery 1208 * o inform TA that meshDA is unknown. 1209 */ 1210 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1211 "%s", "frame not fwd'd, no path"); 1212 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1213 IEEE80211_REASON_MESH_PERR_NO_FI); 1214 vap->iv_stats.is_mesh_fwd_nopath++; 1215 m_freem(mcopy); 1216 return; 1217 } 1218 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1219 } 1220 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1221 mccopy->mc_ttl--; 1222 1223 /* XXX calculate priority so drivers can find the tx queue */ 1224 M_WME_SETAC(mcopy, WME_AC_BE); 1225 1226 /* XXX do we know m_nextpkt is NULL? */ 1227 mcopy->m_pkthdr.rcvif = (void *) ni; 1228 1229 /* 1230 * XXX this bypasses all of the VAP TX handling; it passes frames 1231 * directly to the parent interface. 1232 * 1233 * Because of this, there's no TX lock being held as there's no 1234 * encaps state being used. 1235 * 1236 * Doing a direct parent transmit may not be the correct thing 1237 * to do here; we'll have to re-think this soon. 1238 */ 1239 IEEE80211_TX_LOCK(ic); 1240 err = ieee80211_parent_xmitpkt(ic, mcopy); 1241 IEEE80211_TX_UNLOCK(ic); 1242 if (err != 0) { 1243 /* NB: IFQ_HANDOFF reclaims mbuf */ 1244 ieee80211_free_node(ni); 1245 } else { 1246 IFNET_STAT_INC(ifp, opackets, 1); 1247 } 1248 } 1249 1250 static struct mbuf * 1251 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1252 { 1253 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1254 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1255 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1256 sizeof(struct ieee80211_meshcntl_ae10)]; 1257 const struct ieee80211_qosframe_addr4 *wh; 1258 const struct ieee80211_meshcntl_ae10 *mc; 1259 struct ether_header *eh; 1260 struct llc *llc; 1261 int ae; 1262 1263 if (m->m_len < hdrlen + sizeof(*llc) && 1264 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1265 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1266 "discard data frame: %s", "m_pullup failed"); 1267 vap->iv_stats.is_rx_tooshort++; 1268 return NULL; 1269 } 1270 memcpy(b, mtod(m, caddr_t), hdrlen); 1271 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1272 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1273 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1274 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1275 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1276 1277 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1278 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1279 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1280 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1281 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1282 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1283 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1284 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1285 llc = NULL; 1286 } else { 1287 m_adj(m, hdrlen - sizeof(*eh)); 1288 } 1289 eh = mtod(m, struct ether_header *); 1290 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1291 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1292 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1293 if (ae == IEEE80211_MESH_AE_00) { 1294 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1295 } else if (ae == IEEE80211_MESH_AE_01) { 1296 IEEE80211_ADDR_COPY(eh->ether_shost, 1297 MC01(mc)->mc_addr4); 1298 } else { 1299 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1300 (const struct ieee80211_frame *)wh, NULL, 1301 "bad AE %d", ae); 1302 vap->iv_stats.is_mesh_badae++; 1303 m_freem(m); 1304 return NULL; 1305 } 1306 } else { 1307 if (ae == IEEE80211_MESH_AE_00) { 1308 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1309 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1310 } else if (ae == IEEE80211_MESH_AE_10) { 1311 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1312 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1313 } else { 1314 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1315 (const struct ieee80211_frame *)wh, NULL, 1316 "bad AE %d", ae); 1317 vap->iv_stats.is_mesh_badae++; 1318 m_freem(m); 1319 return NULL; 1320 } 1321 } 1322 #ifndef __NO_STRICT_ALIGNMENT 1323 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1324 m = ieee80211_realign(vap, m, sizeof(*eh)); 1325 if (m == NULL) 1326 return NULL; 1327 } 1328 #endif /* !__NO_STRICT_ALIGNMENT */ 1329 if (llc != NULL) { 1330 eh = mtod(m, struct ether_header *); 1331 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1332 } 1333 return m; 1334 #undef WDIR 1335 #undef MC01 1336 } 1337 1338 /* 1339 * Return non-zero if the unicast mesh data frame should be processed 1340 * locally. Frames that are not proxy'd have our address, otherwise 1341 * we need to consult the routing table to look for a proxy entry. 1342 */ 1343 static __inline int 1344 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1345 const struct ieee80211_meshcntl *mc) 1346 { 1347 int ae = mc->mc_flags & 3; 1348 1349 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1350 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1351 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1352 ("bad AE %d", ae)); 1353 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1354 const struct ieee80211_meshcntl_ae10 *mc10 = 1355 (const struct ieee80211_meshcntl_ae10 *) mc; 1356 struct ieee80211_mesh_route *rt = 1357 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1358 /* check for proxy route to ourself */ 1359 return (rt != NULL && 1360 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1361 } else /* ucast w/o proxy */ 1362 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1363 } 1364 1365 /* 1366 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1367 * > 0 means we have forwarded data and no need to process locally 1368 * == 0 means we want to process locally (and we may have forwarded data 1369 * < 0 means there was an error and data should be discarded 1370 */ 1371 static int 1372 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1373 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1374 { 1375 struct ieee80211_qosframe_addr4 *qwh; 1376 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1377 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1378 1379 /* This is called from the RX path - don't hold this lock */ 1380 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1381 1382 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1383 1384 /* 1385 * TODO: 1386 * o verify addr2 is a legitimate transmitter 1387 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1388 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1389 */ 1390 1391 /* set lifetime of addr3 (meshDA) to initial value */ 1392 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1393 if (rt_meshda == NULL) { 1394 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1395 "no route to meshDA(%s)", ether_sprintf(qwh->i_addr3)); 1396 /* 1397 * [Optional] any of the following three actions: 1398 * o silently discard [X] 1399 * o trigger a path discovery [ ] 1400 * o inform TA that meshDA is unknown. [ ] 1401 */ 1402 /* XXX: stats */ 1403 return (-1); 1404 } 1405 1406 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1407 ms->ms_ppath->mpp_inact)); 1408 1409 /* set lifetime of addr4 (meshSA) to initial value */ 1410 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1411 KASSERT(rt_meshsa != NULL, ("no route")); 1412 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1413 ms->ms_ppath->mpp_inact)); 1414 1415 mesh_forward(vap, m, mc); 1416 return (1); /* dont process locally */ 1417 } 1418 1419 /* 1420 * Verifies transmitter, updates lifetime, precursor list and process data 1421 * locally, if data is proxy with AE = 10 it could mean data should go 1422 * on another mesh path or data should be forwarded to the DS. 1423 * 1424 * > 0 means we have forwarded data and no need to process locally 1425 * == 0 means we want to process locally (and we may have forwarded data 1426 * < 0 means there was an error and data should be discarded 1427 */ 1428 static int 1429 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1430 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1431 { 1432 struct ieee80211_qosframe_addr4 *qwh; 1433 const struct ieee80211_meshcntl_ae10 *mc10; 1434 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1435 struct ieee80211_mesh_route *rt; 1436 int ae; 1437 1438 /* This is called from the RX path - don't hold this lock */ 1439 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1440 1441 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1442 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1443 1444 /* 1445 * TODO: 1446 * o verify addr2 is a legitimate transmitter 1447 * o lifetime of precursor entry is max(init, curr) 1448 */ 1449 1450 /* set lifetime of addr4 (meshSA) to initial value */ 1451 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1452 KASSERT(rt != NULL, ("no route")); 1453 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1454 rt = NULL; 1455 1456 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1457 KASSERT(ae == IEEE80211_MESH_AE_00 || 1458 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1459 if (ae == IEEE80211_MESH_AE_10) { 1460 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1461 return (0); /* process locally */ 1462 } 1463 1464 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1465 if (rt != NULL && 1466 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1467 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1468 /* 1469 * Forward on another mesh-path, according to 1470 * amendment as specified in 9.32.4.1 1471 */ 1472 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1473 mesh_forward(vap, m, 1474 (const struct ieee80211_meshcntl *)mc10); 1475 return (1); /* dont process locally */ 1476 } 1477 /* 1478 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1479 * addressed according to 13.11.3.2. 1480 */ 1481 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1482 "forward frame to DS, SA(%s) DA(%s)", 1483 ether_sprintf(mc10->mc_addr6), 1484 ether_sprintf(mc10->mc_addr5)); 1485 } 1486 return (0); /* process locally */ 1487 } 1488 1489 /* 1490 * Try to forward the group addressed data on to other mesh STAs, and 1491 * also to the DS. 1492 * 1493 * > 0 means we have forwarded data and no need to process locally 1494 * == 0 means we want to process locally (and we may have forwarded data 1495 * < 0 means there was an error and data should be discarded 1496 */ 1497 static int 1498 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1499 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1500 { 1501 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1502 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1503 1504 /* This is called from the RX path - don't hold this lock */ 1505 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1506 1507 mesh_forward(vap, m, mc); 1508 1509 if(mc->mc_ttl > 0) { 1510 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1511 /* 1512 * Forward of MSDUs from the MBSS to DS group addressed 1513 * (according to 13.11.3.2) 1514 * This happens by delivering the packet, and a bridge 1515 * will sent it on another port member. 1516 */ 1517 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1518 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1519 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1520 MC01(mc)->mc_addr4, "%s", 1521 "forward from MBSS to the DS"); 1522 } 1523 } 1524 return (0); /* process locally */ 1525 #undef MC01 1526 } 1527 1528 static int 1529 mesh_input(struct ieee80211_node *ni, struct mbuf *m, 1530 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1531 { 1532 #define HAS_SEQ(type) ((type & 0x4) == 0) 1533 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1534 #define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1535 struct ieee80211vap *vap = ni->ni_vap; 1536 struct ieee80211com *ic = ni->ni_ic; 1537 struct ifnet *ifp = vap->iv_ifp; 1538 struct ieee80211_frame *wh; 1539 const struct ieee80211_meshcntl *mc; 1540 int hdrspace, meshdrlen, need_tap, error; 1541 uint8_t dir, type, subtype, ae; 1542 uint32_t seq; 1543 const uint8_t *addr; 1544 uint8_t qos[2]; 1545 ieee80211_seq rxseq; 1546 1547 KASSERT(ni != NULL, ("null node")); 1548 ni->ni_inact = ni->ni_inact_reload; 1549 1550 need_tap = 1; /* mbuf need to be tapped. */ 1551 type = -1; /* undefined */ 1552 1553 /* This is called from the RX path - don't hold this lock */ 1554 IEEE80211_TX_UNLOCK_ASSERT(ic); 1555 1556 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1557 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1558 ni->ni_macaddr, NULL, 1559 "too short (1): len %u", m->m_pkthdr.len); 1560 vap->iv_stats.is_rx_tooshort++; 1561 goto out; 1562 } 1563 /* 1564 * Bit of a cheat here, we use a pointer for a 3-address 1565 * frame format but don't reference fields past outside 1566 * ieee80211_frame_min w/o first validating the data is 1567 * present. 1568 */ 1569 wh = mtod(m, struct ieee80211_frame *); 1570 1571 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1572 IEEE80211_FC0_VERSION_0) { 1573 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1574 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1575 vap->iv_stats.is_rx_badversion++; 1576 goto err; 1577 } 1578 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1579 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1580 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1581 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1582 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1583 ni->ni_noise = nf; 1584 if (HAS_SEQ(type)) { 1585 uint8_t tid = ieee80211_gettid(wh); 1586 1587 if (IEEE80211_QOS_HAS_SEQ(wh) && 1588 TID_TO_WME_AC(tid) >= WME_AC_VI) 1589 ic->ic_wme.wme_hipri_traffic++; 1590 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1591 if (! ieee80211_check_rxseq(ni, wh)) { 1592 /* duplicate, discard */ 1593 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1594 wh->i_addr1, "duplicate", 1595 "seqno <%u,%u> fragno <%u,%u> tid %u", 1596 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1597 ni->ni_rxseqs[tid] >> 1598 IEEE80211_SEQ_SEQ_SHIFT, 1599 rxseq & IEEE80211_SEQ_FRAG_MASK, 1600 ni->ni_rxseqs[tid] & 1601 IEEE80211_SEQ_FRAG_MASK, 1602 tid); 1603 vap->iv_stats.is_rx_dup++; 1604 IEEE80211_NODE_STAT(ni, rx_dup); 1605 goto out; 1606 } 1607 ni->ni_rxseqs[tid] = rxseq; 1608 } 1609 } 1610 #ifdef IEEE80211_DEBUG 1611 /* 1612 * It's easier, but too expensive, to simulate different mesh 1613 * topologies by consulting the ACL policy very early, so do this 1614 * only under DEBUG. 1615 * 1616 * NB: this check is also done upon peering link initiation. 1617 */ 1618 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1619 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1620 wh, NULL, "%s", "disallowed by ACL"); 1621 vap->iv_stats.is_rx_acl++; 1622 goto out; 1623 } 1624 #endif 1625 switch (type) { 1626 case IEEE80211_FC0_TYPE_DATA: 1627 if (ni == vap->iv_bss) 1628 goto out; 1629 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1630 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1631 ni->ni_macaddr, NULL, 1632 "peer link not yet established (%d)", 1633 ni->ni_mlstate); 1634 vap->iv_stats.is_mesh_nolink++; 1635 goto out; 1636 } 1637 if (dir != IEEE80211_FC1_DIR_FROMDS && 1638 dir != IEEE80211_FC1_DIR_DSTODS) { 1639 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1640 wh, "data", "incorrect dir 0x%x", dir); 1641 vap->iv_stats.is_rx_wrongdir++; 1642 goto err; 1643 } 1644 1645 /* All Mesh data frames are QoS subtype */ 1646 if (!HAS_SEQ(type)) { 1647 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1648 wh, "data", "incorrect subtype 0x%x", subtype); 1649 vap->iv_stats.is_rx_badsubtype++; 1650 goto err; 1651 } 1652 1653 /* 1654 * Next up, any fragmentation. 1655 * XXX: we defrag before we even try to forward, 1656 * Mesh Control field is not present in sub-sequent 1657 * fragmented frames. This is in contrast to Draft 4.0. 1658 */ 1659 hdrspace = ieee80211_hdrspace(ic, wh); 1660 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1661 m = ieee80211_defrag(ni, m, hdrspace); 1662 if (m == NULL) { 1663 /* Fragment dropped or frame not complete yet */ 1664 goto out; 1665 } 1666 } 1667 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1668 1669 /* 1670 * Now we have a complete Mesh Data frame. 1671 */ 1672 1673 /* 1674 * Only fromDStoDS data frames use 4 address qos frames 1675 * as specified in amendment. Otherwise addr4 is located 1676 * in the Mesh Control field and a 3 address qos frame 1677 * is used. 1678 */ 1679 if (IEEE80211_IS_DSTODS(wh)) 1680 *(uint16_t *)qos = *(uint16_t *) 1681 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1682 else 1683 *(uint16_t *)qos = *(uint16_t *) 1684 ((struct ieee80211_qosframe *)wh)->i_qos; 1685 1686 /* 1687 * NB: The mesh STA sets the Mesh Control Present 1688 * subfield to 1 in the Mesh Data frame containing 1689 * an unfragmented MSDU, an A-MSDU, or the first 1690 * fragment of an MSDU. 1691 * After defrag it should always be present. 1692 */ 1693 if (!(qos[1] & IEEE80211_QOS_MC)) { 1694 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1695 ni->ni_macaddr, NULL, 1696 "%s", "Mesh control field not present"); 1697 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1698 goto err; 1699 } 1700 1701 /* pull up enough to get to the mesh control */ 1702 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1703 (m = m_pullup(m, hdrspace + 1704 sizeof(struct ieee80211_meshcntl))) == NULL) { 1705 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1706 ni->ni_macaddr, NULL, 1707 "data too short: expecting %u", hdrspace); 1708 vap->iv_stats.is_rx_tooshort++; 1709 goto out; /* XXX */ 1710 } 1711 /* 1712 * Now calculate the full extent of the headers. Note 1713 * mesh_decap will pull up anything we didn't get 1714 * above when it strips the 802.11 headers. 1715 */ 1716 mc = (const struct ieee80211_meshcntl *) 1717 (mtod(m, const uint8_t *) + hdrspace); 1718 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1719 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1720 ae * IEEE80211_ADDR_LEN; 1721 hdrspace += meshdrlen; 1722 1723 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1724 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1725 (m->m_len < hdrspace) && 1726 ((m = m_pullup(m, hdrspace)) == NULL)) { 1727 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1728 ni->ni_macaddr, NULL, 1729 "data too short: expecting %u", hdrspace); 1730 vap->iv_stats.is_rx_tooshort++; 1731 goto out; /* XXX */ 1732 } 1733 /* XXX: are we sure there is no reallocating after m_pullup? */ 1734 1735 seq = LE_READ_4(mc->mc_seq); 1736 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1737 addr = wh->i_addr3; 1738 else if (ae == IEEE80211_MESH_AE_01) 1739 addr = MC01(mc)->mc_addr4; 1740 else 1741 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1742 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1743 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1744 addr, "data", "%s", "not to me"); 1745 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1746 goto out; 1747 } 1748 if (mesh_checkpseq(vap, addr, seq) != 0) { 1749 vap->iv_stats.is_rx_dup++; 1750 goto out; 1751 } 1752 1753 /* This code "routes" the frame to the right control path */ 1754 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1755 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1756 error = 1757 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1758 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1759 error = mesh_recv_group_data(vap, m, wh, mc); 1760 else 1761 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1762 wh, mc); 1763 } else 1764 error = mesh_recv_group_data(vap, m, wh, mc); 1765 if (error < 0) 1766 goto err; 1767 else if (error > 0) 1768 goto out; 1769 1770 if (ieee80211_radiotap_active_vap(vap)) 1771 ieee80211_radiotap_rx(vap, m); 1772 need_tap = 0; 1773 1774 /* 1775 * Finally, strip the 802.11 header. 1776 */ 1777 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1778 if (m == NULL) { 1779 /* XXX mask bit to check for both */ 1780 /* don't count Null data frames as errors */ 1781 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1782 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1783 goto out; 1784 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1785 ni->ni_macaddr, "data", "%s", "decap error"); 1786 vap->iv_stats.is_rx_decap++; 1787 IEEE80211_NODE_STAT(ni, rx_decap); 1788 goto err; 1789 } 1790 if (qos[0] & IEEE80211_QOS_AMSDU) { 1791 m = ieee80211_decap_amsdu(ni, m); 1792 if (m == NULL) 1793 return IEEE80211_FC0_TYPE_DATA; 1794 } 1795 ieee80211_deliver_data(vap, ni, m); 1796 return type; 1797 case IEEE80211_FC0_TYPE_MGT: 1798 vap->iv_stats.is_rx_mgmt++; 1799 IEEE80211_NODE_STAT(ni, rx_mgmt); 1800 if (dir != IEEE80211_FC1_DIR_NODS) { 1801 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1802 wh, "mgt", "incorrect dir 0x%x", dir); 1803 vap->iv_stats.is_rx_wrongdir++; 1804 goto err; 1805 } 1806 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1807 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1808 ni->ni_macaddr, "mgt", "too short: len %u", 1809 m->m_pkthdr.len); 1810 vap->iv_stats.is_rx_tooshort++; 1811 goto out; 1812 } 1813 #ifdef IEEE80211_DEBUG 1814 if ((ieee80211_msg_debug(vap) && 1815 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1816 ieee80211_msg_dumppkts(vap)) { 1817 if_printf(ifp, "received %s from %s rssi %d\n", 1818 ieee80211_mgt_subtype_name[subtype >> 1819 IEEE80211_FC0_SUBTYPE_SHIFT], 1820 ether_sprintf(wh->i_addr2), rssi); 1821 } 1822 #endif 1823 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1824 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1825 wh, NULL, "%s", "WEP set but not permitted"); 1826 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1827 goto out; 1828 } 1829 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 1830 goto out; 1831 case IEEE80211_FC0_TYPE_CTL: 1832 vap->iv_stats.is_rx_ctl++; 1833 IEEE80211_NODE_STAT(ni, rx_ctrl); 1834 goto out; 1835 default: 1836 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1837 wh, "bad", "frame type 0x%x", type); 1838 /* should not come here */ 1839 break; 1840 } 1841 err: 1842 IFNET_STAT_INC(ifp, ierrors, 1); 1843 out: 1844 if (m != NULL) { 1845 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1846 ieee80211_radiotap_rx(vap, m); 1847 m_freem(m); 1848 } 1849 return type; 1850 #undef HAS_SEQ 1851 #undef MC01 1852 #undef MC10 1853 } 1854 1855 static void 1856 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1857 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1858 { 1859 struct ieee80211vap *vap = ni->ni_vap; 1860 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1861 struct ieee80211com *ic = ni->ni_ic; 1862 struct ieee80211_channel *rxchan = ic->ic_curchan; 1863 struct ieee80211_frame *wh; 1864 struct ieee80211_mesh_route *rt; 1865 uint8_t *frm, *efrm; 1866 1867 wh = mtod(m0, struct ieee80211_frame *); 1868 frm = (uint8_t *)&wh[1]; 1869 efrm = mtod(m0, uint8_t *) + m0->m_len; 1870 switch (subtype) { 1871 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1872 case IEEE80211_FC0_SUBTYPE_BEACON: 1873 { 1874 struct ieee80211_scanparams scan; 1875 struct ieee80211_channel *c; 1876 /* 1877 * We process beacon/probe response 1878 * frames to discover neighbors. 1879 */ 1880 if (rxs != NULL) { 1881 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1882 if (c != NULL) 1883 rxchan = c; 1884 } 1885 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) 1886 return; 1887 /* 1888 * Count frame now that we know it's to be processed. 1889 */ 1890 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1891 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1892 IEEE80211_NODE_STAT(ni, rx_beacons); 1893 } else 1894 IEEE80211_NODE_STAT(ni, rx_proberesp); 1895 /* 1896 * If scanning, just pass information to the scan module. 1897 */ 1898 if (ic->ic_flags & IEEE80211_F_SCAN) { 1899 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1900 /* 1901 * Actively scanning a channel marked passive; 1902 * send a probe request now that we know there 1903 * is 802.11 traffic present. 1904 * 1905 * XXX check if the beacon we recv'd gives 1906 * us what we need and suppress the probe req 1907 */ 1908 ieee80211_probe_curchan(vap, 1); 1909 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1910 } 1911 ieee80211_add_scan(vap, rxchan, &scan, wh, 1912 subtype, rssi, nf); 1913 return; 1914 } 1915 1916 /* The rest of this code assumes we are running */ 1917 if (vap->iv_state != IEEE80211_S_RUN) 1918 return; 1919 /* 1920 * Ignore non-mesh STAs. 1921 */ 1922 if ((scan.capinfo & 1923 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1924 scan.meshid == NULL || scan.meshconf == NULL) { 1925 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1926 wh, "beacon", "%s", "not a mesh sta"); 1927 vap->iv_stats.is_mesh_wrongmesh++; 1928 return; 1929 } 1930 /* 1931 * Ignore STAs for other mesh networks. 1932 */ 1933 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1934 mesh_verify_meshconf(vap, scan.meshconf)) { 1935 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1936 wh, "beacon", "%s", "not for our mesh"); 1937 vap->iv_stats.is_mesh_wrongmesh++; 1938 return; 1939 } 1940 /* 1941 * Peer only based on the current ACL policy. 1942 */ 1943 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1944 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1945 wh, NULL, "%s", "disallowed by ACL"); 1946 vap->iv_stats.is_rx_acl++; 1947 return; 1948 } 1949 /* 1950 * Do neighbor discovery. 1951 */ 1952 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1953 /* 1954 * Create a new entry in the neighbor table. 1955 */ 1956 ni = ieee80211_add_neighbor(vap, wh, &scan); 1957 } 1958 /* 1959 * Automatically peer with discovered nodes if possible. 1960 */ 1961 if (ni != vap->iv_bss && 1962 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1963 switch (ni->ni_mlstate) { 1964 case IEEE80211_NODE_MESH_IDLE: 1965 { 1966 uint16_t args[1]; 1967 1968 /* Wait for backoff callout to reset counter */ 1969 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1970 return; 1971 1972 ni->ni_mlpid = mesh_generateid(vap); 1973 if (ni->ni_mlpid == 0) 1974 return; 1975 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1976 args[0] = ni->ni_mlpid; 1977 ieee80211_send_action(ni, 1978 IEEE80211_ACTION_CAT_SELF_PROT, 1979 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1980 ni->ni_mlrcnt = 0; 1981 mesh_peer_timeout_setup(ni); 1982 break; 1983 } 1984 case IEEE80211_NODE_MESH_ESTABLISHED: 1985 { 1986 /* 1987 * Valid beacon from a peer mesh STA 1988 * bump TA lifetime 1989 */ 1990 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 1991 if(rt != NULL) { 1992 ieee80211_mesh_rt_update(rt, 1993 ticks_to_msecs( 1994 ms->ms_ppath->mpp_inact)); 1995 } 1996 break; 1997 } 1998 default: 1999 break; /* ignore */ 2000 } 2001 } 2002 break; 2003 } 2004 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2005 { 2006 uint8_t *ssid, *meshid, *rates, *xrates; 2007 uint8_t *sfrm; 2008 2009 if (vap->iv_state != IEEE80211_S_RUN) { 2010 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2011 wh, NULL, "wrong state %s", 2012 ieee80211_state_name[vap->iv_state]); 2013 vap->iv_stats.is_rx_mgtdiscard++; 2014 return; 2015 } 2016 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 2017 /* frame must be directed */ 2018 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2019 wh, NULL, "%s", "not unicast"); 2020 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 2021 return; 2022 } 2023 /* 2024 * prreq frame format 2025 * [tlv] ssid 2026 * [tlv] supported rates 2027 * [tlv] extended supported rates 2028 * [tlv] mesh id 2029 */ 2030 ssid = meshid = rates = xrates = NULL; 2031 sfrm = frm; 2032 while (efrm - frm > 1) { 2033 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2034 switch (*frm) { 2035 case IEEE80211_ELEMID_SSID: 2036 ssid = frm; 2037 break; 2038 case IEEE80211_ELEMID_RATES: 2039 rates = frm; 2040 break; 2041 case IEEE80211_ELEMID_XRATES: 2042 xrates = frm; 2043 break; 2044 case IEEE80211_ELEMID_MESHID: 2045 meshid = frm; 2046 break; 2047 } 2048 frm += frm[1] + 2; 2049 } 2050 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2051 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2052 if (xrates != NULL) 2053 IEEE80211_VERIFY_ELEMENT(xrates, 2054 IEEE80211_RATE_MAXSIZE - rates[1], return); 2055 if (meshid != NULL) { 2056 IEEE80211_VERIFY_ELEMENT(meshid, 2057 IEEE80211_MESHID_LEN, return); 2058 /* NB: meshid, not ssid */ 2059 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2060 } 2061 2062 /* XXX find a better class or define it's own */ 2063 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2064 "%s", "recv probe req"); 2065 /* 2066 * Some legacy 11b clients cannot hack a complete 2067 * probe response frame. When the request includes 2068 * only a bare-bones rate set, communicate this to 2069 * the transmit side. 2070 */ 2071 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2072 break; 2073 } 2074 2075 case IEEE80211_FC0_SUBTYPE_ACTION: 2076 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2077 if (ni == vap->iv_bss) { 2078 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2079 wh, NULL, "%s", "unknown node"); 2080 vap->iv_stats.is_rx_mgtdiscard++; 2081 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2082 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2083 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2084 wh, NULL, "%s", "not for us"); 2085 vap->iv_stats.is_rx_mgtdiscard++; 2086 } else if (vap->iv_state != IEEE80211_S_RUN) { 2087 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2088 wh, NULL, "wrong state %s", 2089 ieee80211_state_name[vap->iv_state]); 2090 vap->iv_stats.is_rx_mgtdiscard++; 2091 } else { 2092 if (ieee80211_parse_action(ni, m0) == 0) 2093 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2094 } 2095 break; 2096 2097 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2098 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2099 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2100 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2101 case IEEE80211_FC0_SUBTYPE_ATIM: 2102 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2103 case IEEE80211_FC0_SUBTYPE_AUTH: 2104 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2105 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2106 wh, NULL, "%s", "not handled"); 2107 vap->iv_stats.is_rx_mgtdiscard++; 2108 break; 2109 2110 default: 2111 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2112 wh, "mgt", "subtype 0x%x not handled", subtype); 2113 vap->iv_stats.is_rx_badsubtype++; 2114 break; 2115 } 2116 } 2117 2118 static void 2119 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2120 { 2121 2122 switch (subtype) { 2123 case IEEE80211_FC0_SUBTYPE_BAR: 2124 ieee80211_recv_bar(ni, m); 2125 break; 2126 } 2127 } 2128 2129 /* 2130 * Parse meshpeering action ie's for MPM frames 2131 */ 2132 static const struct ieee80211_meshpeer_ie * 2133 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2134 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2135 const uint8_t *frm, const uint8_t *efrm, 2136 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2137 { 2138 struct ieee80211vap *vap = ni->ni_vap; 2139 const struct ieee80211_meshpeer_ie *mpie; 2140 uint16_t args[3]; 2141 const uint8_t *meshid, *meshconf, *meshpeer; 2142 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2143 2144 meshid = meshconf = meshpeer = NULL; 2145 while (efrm - frm > 1) { 2146 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2147 switch (*frm) { 2148 case IEEE80211_ELEMID_MESHID: 2149 meshid = frm; 2150 break; 2151 case IEEE80211_ELEMID_MESHCONF: 2152 meshconf = frm; 2153 break; 2154 case IEEE80211_ELEMID_MESHPEER: 2155 meshpeer = frm; 2156 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2157 memset(mp, 0, sizeof(*mp)); 2158 mp->peer_len = mpie->peer_len; 2159 mp->peer_proto = LE_READ_2(&mpie->peer_proto); 2160 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 2161 switch (subtype) { 2162 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2163 mp->peer_linkid = 2164 LE_READ_2(&mpie->peer_linkid); 2165 break; 2166 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2167 /* NB: peer link ID is optional */ 2168 if (mpie->peer_len == 2169 (IEEE80211_MPM_BASE_SZ + 2)) { 2170 mp->peer_linkid = 0; 2171 mp->peer_rcode = 2172 LE_READ_2(&mpie->peer_linkid); 2173 } else { 2174 mp->peer_linkid = 2175 LE_READ_2(&mpie->peer_linkid); 2176 mp->peer_rcode = 2177 LE_READ_2(&mpie->peer_rcode); 2178 } 2179 break; 2180 } 2181 break; 2182 } 2183 frm += frm[1] + 2; 2184 } 2185 2186 /* 2187 * Verify the contents of the frame. 2188 * If it fails validation, close the peer link. 2189 */ 2190 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2191 sendclose = 1; 2192 IEEE80211_DISCARD(vap, 2193 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2194 wh, NULL, "%s", "MPM validation failed"); 2195 } 2196 2197 /* If meshid is not the same reject any frames type. */ 2198 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2199 sendclose = 1; 2200 IEEE80211_DISCARD(vap, 2201 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2202 wh, NULL, "%s", "not for our mesh"); 2203 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2204 /* 2205 * Standard not clear about this, if we dont ignore 2206 * there will be an endless loop between nodes sending 2207 * CLOSE frames between each other with wrong meshid. 2208 * Discard and timers will bring FSM to IDLE state. 2209 */ 2210 return NULL; 2211 } 2212 } 2213 2214 /* 2215 * Close frames are accepted if meshid is the same. 2216 * Verify the other two types. 2217 */ 2218 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2219 mesh_verify_meshconf(vap, meshconf)) { 2220 sendclose = 1; 2221 IEEE80211_DISCARD(vap, 2222 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2223 wh, NULL, "%s", "configuration missmatch"); 2224 } 2225 2226 if (sendclose) { 2227 vap->iv_stats.is_rx_mgtdiscard++; 2228 switch (ni->ni_mlstate) { 2229 case IEEE80211_NODE_MESH_IDLE: 2230 case IEEE80211_NODE_MESH_ESTABLISHED: 2231 case IEEE80211_NODE_MESH_HOLDING: 2232 /* ignore */ 2233 break; 2234 case IEEE80211_NODE_MESH_OPENSNT: 2235 case IEEE80211_NODE_MESH_OPENRCV: 2236 case IEEE80211_NODE_MESH_CONFIRMRCV: 2237 args[0] = ni->ni_mlpid; 2238 args[1] = ni->ni_mllid; 2239 /* Reason codes for rejection */ 2240 switch (subtype) { 2241 case IEEE80211_ACTION_MESHPEERING_OPEN: 2242 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2243 break; 2244 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2245 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2246 break; 2247 } 2248 ieee80211_send_action(ni, 2249 IEEE80211_ACTION_CAT_SELF_PROT, 2250 IEEE80211_ACTION_MESHPEERING_CLOSE, 2251 args); 2252 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2253 mesh_peer_timeout_setup(ni); 2254 break; 2255 } 2256 return NULL; 2257 } 2258 2259 return (const struct ieee80211_meshpeer_ie *) mp; 2260 } 2261 2262 static int 2263 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2264 const struct ieee80211_frame *wh, 2265 const uint8_t *frm, const uint8_t *efrm) 2266 { 2267 struct ieee80211vap *vap = ni->ni_vap; 2268 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2269 struct ieee80211_meshpeer_ie ie; 2270 const struct ieee80211_meshpeer_ie *meshpeer; 2271 uint16_t args[3]; 2272 2273 /* +2+2 for action + code + capabilites */ 2274 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2275 IEEE80211_ACTION_MESHPEERING_OPEN); 2276 if (meshpeer == NULL) { 2277 return 0; 2278 } 2279 2280 /* XXX move up */ 2281 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2282 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2283 2284 switch (ni->ni_mlstate) { 2285 case IEEE80211_NODE_MESH_IDLE: 2286 /* Reject open request if reached our maximum neighbor count */ 2287 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2288 args[0] = meshpeer->peer_llinkid; 2289 args[1] = 0; 2290 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2291 ieee80211_send_action(ni, 2292 IEEE80211_ACTION_CAT_SELF_PROT, 2293 IEEE80211_ACTION_MESHPEERING_CLOSE, 2294 args); 2295 /* stay in IDLE state */ 2296 return (0); 2297 } 2298 /* Open frame accepted */ 2299 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2300 ni->ni_mllid = meshpeer->peer_llinkid; 2301 ni->ni_mlpid = mesh_generateid(vap); 2302 if (ni->ni_mlpid == 0) 2303 return 0; /* XXX */ 2304 args[0] = ni->ni_mlpid; 2305 /* Announce we're open too... */ 2306 ieee80211_send_action(ni, 2307 IEEE80211_ACTION_CAT_SELF_PROT, 2308 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2309 /* ...and confirm the link. */ 2310 args[0] = ni->ni_mlpid; 2311 args[1] = ni->ni_mllid; 2312 ieee80211_send_action(ni, 2313 IEEE80211_ACTION_CAT_SELF_PROT, 2314 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2315 args); 2316 mesh_peer_timeout_setup(ni); 2317 break; 2318 case IEEE80211_NODE_MESH_OPENRCV: 2319 /* Wrong Link ID */ 2320 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2321 args[0] = ni->ni_mllid; 2322 args[1] = ni->ni_mlpid; 2323 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2324 ieee80211_send_action(ni, 2325 IEEE80211_ACTION_CAT_SELF_PROT, 2326 IEEE80211_ACTION_MESHPEERING_CLOSE, 2327 args); 2328 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2329 mesh_peer_timeout_setup(ni); 2330 break; 2331 } 2332 /* Duplicate open, confirm again. */ 2333 args[0] = ni->ni_mlpid; 2334 args[1] = ni->ni_mllid; 2335 ieee80211_send_action(ni, 2336 IEEE80211_ACTION_CAT_SELF_PROT, 2337 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2338 args); 2339 break; 2340 case IEEE80211_NODE_MESH_OPENSNT: 2341 ni->ni_mllid = meshpeer->peer_llinkid; 2342 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2343 args[0] = ni->ni_mlpid; 2344 args[1] = ni->ni_mllid; 2345 ieee80211_send_action(ni, 2346 IEEE80211_ACTION_CAT_SELF_PROT, 2347 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2348 args); 2349 /* NB: don't setup/clear any timeout */ 2350 break; 2351 case IEEE80211_NODE_MESH_CONFIRMRCV: 2352 if (ni->ni_mlpid != meshpeer->peer_linkid || 2353 ni->ni_mllid != meshpeer->peer_llinkid) { 2354 args[0] = ni->ni_mlpid; 2355 args[1] = ni->ni_mllid; 2356 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2357 ieee80211_send_action(ni, 2358 IEEE80211_ACTION_CAT_SELF_PROT, 2359 IEEE80211_ACTION_MESHPEERING_CLOSE, 2360 args); 2361 mesh_linkchange(ni, 2362 IEEE80211_NODE_MESH_HOLDING); 2363 mesh_peer_timeout_setup(ni); 2364 break; 2365 } 2366 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2367 ni->ni_mllid = meshpeer->peer_llinkid; 2368 args[0] = ni->ni_mlpid; 2369 args[1] = ni->ni_mllid; 2370 ieee80211_send_action(ni, 2371 IEEE80211_ACTION_CAT_SELF_PROT, 2372 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2373 args); 2374 mesh_peer_timeout_stop(ni); 2375 break; 2376 case IEEE80211_NODE_MESH_ESTABLISHED: 2377 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2378 args[0] = ni->ni_mllid; 2379 args[1] = ni->ni_mlpid; 2380 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2381 ieee80211_send_action(ni, 2382 IEEE80211_ACTION_CAT_SELF_PROT, 2383 IEEE80211_ACTION_MESHPEERING_CLOSE, 2384 args); 2385 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2386 mesh_peer_timeout_setup(ni); 2387 break; 2388 } 2389 args[0] = ni->ni_mlpid; 2390 args[1] = ni->ni_mllid; 2391 ieee80211_send_action(ni, 2392 IEEE80211_ACTION_CAT_SELF_PROT, 2393 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2394 args); 2395 break; 2396 case IEEE80211_NODE_MESH_HOLDING: 2397 args[0] = ni->ni_mlpid; 2398 args[1] = meshpeer->peer_llinkid; 2399 /* Standard not clear about what the reaason code should be */ 2400 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2401 ieee80211_send_action(ni, 2402 IEEE80211_ACTION_CAT_SELF_PROT, 2403 IEEE80211_ACTION_MESHPEERING_CLOSE, 2404 args); 2405 break; 2406 } 2407 return 0; 2408 } 2409 2410 static int 2411 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2412 const struct ieee80211_frame *wh, 2413 const uint8_t *frm, const uint8_t *efrm) 2414 { 2415 struct ieee80211vap *vap = ni->ni_vap; 2416 struct ieee80211_meshpeer_ie ie; 2417 const struct ieee80211_meshpeer_ie *meshpeer; 2418 uint16_t args[3]; 2419 2420 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2421 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2422 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2423 if (meshpeer == NULL) { 2424 return 0; 2425 } 2426 2427 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2428 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2429 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2430 2431 switch (ni->ni_mlstate) { 2432 case IEEE80211_NODE_MESH_OPENRCV: 2433 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2434 mesh_peer_timeout_stop(ni); 2435 break; 2436 case IEEE80211_NODE_MESH_OPENSNT: 2437 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2438 mesh_peer_timeout_setup(ni); 2439 break; 2440 case IEEE80211_NODE_MESH_HOLDING: 2441 args[0] = ni->ni_mlpid; 2442 args[1] = meshpeer->peer_llinkid; 2443 /* Standard not clear about what the reaason code should be */ 2444 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2445 ieee80211_send_action(ni, 2446 IEEE80211_ACTION_CAT_SELF_PROT, 2447 IEEE80211_ACTION_MESHPEERING_CLOSE, 2448 args); 2449 break; 2450 case IEEE80211_NODE_MESH_CONFIRMRCV: 2451 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2452 args[0] = ni->ni_mlpid; 2453 args[1] = ni->ni_mllid; 2454 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2455 ieee80211_send_action(ni, 2456 IEEE80211_ACTION_CAT_SELF_PROT, 2457 IEEE80211_ACTION_MESHPEERING_CLOSE, 2458 args); 2459 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2460 mesh_peer_timeout_setup(ni); 2461 } 2462 break; 2463 default: 2464 IEEE80211_DISCARD(vap, 2465 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2466 wh, NULL, "received confirm in invalid state %d", 2467 ni->ni_mlstate); 2468 vap->iv_stats.is_rx_mgtdiscard++; 2469 break; 2470 } 2471 return 0; 2472 } 2473 2474 static int 2475 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2476 const struct ieee80211_frame *wh, 2477 const uint8_t *frm, const uint8_t *efrm) 2478 { 2479 struct ieee80211_meshpeer_ie ie; 2480 const struct ieee80211_meshpeer_ie *meshpeer; 2481 uint16_t args[3]; 2482 2483 /* +2 for action + code */ 2484 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2485 IEEE80211_ACTION_MESHPEERING_CLOSE); 2486 if (meshpeer == NULL) { 2487 return 0; 2488 } 2489 2490 /* 2491 * XXX: check reason code, for example we could receive 2492 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2493 * to peer again. 2494 */ 2495 2496 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2497 ni, "%s", "recv PEER CLOSE"); 2498 2499 switch (ni->ni_mlstate) { 2500 case IEEE80211_NODE_MESH_IDLE: 2501 /* ignore */ 2502 break; 2503 case IEEE80211_NODE_MESH_OPENRCV: 2504 case IEEE80211_NODE_MESH_OPENSNT: 2505 case IEEE80211_NODE_MESH_CONFIRMRCV: 2506 case IEEE80211_NODE_MESH_ESTABLISHED: 2507 args[0] = ni->ni_mlpid; 2508 args[1] = ni->ni_mllid; 2509 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2510 ieee80211_send_action(ni, 2511 IEEE80211_ACTION_CAT_SELF_PROT, 2512 IEEE80211_ACTION_MESHPEERING_CLOSE, 2513 args); 2514 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2515 mesh_peer_timeout_setup(ni); 2516 break; 2517 case IEEE80211_NODE_MESH_HOLDING: 2518 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2519 mesh_peer_timeout_stop(ni); 2520 break; 2521 } 2522 return 0; 2523 } 2524 2525 /* 2526 * Link Metric handling. 2527 */ 2528 static int 2529 mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2530 const struct ieee80211_frame *wh, 2531 const uint8_t *frm, const uint8_t *efrm) 2532 { 2533 const struct ieee80211_meshlmetric_ie *ie = 2534 (const struct ieee80211_meshlmetric_ie *) 2535 (frm+2); /* action + code */ 2536 struct ieee80211_meshlmetric_ie lm_rep; 2537 2538 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2539 lm_rep.lm_flags = 0; 2540 lm_rep.lm_metric = mesh_airtime_calc(ni); 2541 ieee80211_send_action(ni, 2542 IEEE80211_ACTION_CAT_MESH, 2543 IEEE80211_ACTION_MESH_LMETRIC, 2544 &lm_rep); 2545 } 2546 /* XXX: else do nothing for now */ 2547 return 0; 2548 } 2549 2550 /* 2551 * Parse meshgate action ie's for GANN frames. 2552 * Returns -1 if parsing fails, otherwise 0. 2553 */ 2554 static int 2555 mesh_parse_meshgate_action(struct ieee80211_node *ni, 2556 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2557 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2558 { 2559 struct ieee80211vap *vap = ni->ni_vap; 2560 const struct ieee80211_meshgann_ie *gannie; 2561 2562 while (efrm - frm > 1) { 2563 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2564 switch (*frm) { 2565 case IEEE80211_ELEMID_MESHGANN: 2566 gannie = (const struct ieee80211_meshgann_ie *) frm; 2567 memset(ie, 0, sizeof(*ie)); 2568 ie->gann_ie = gannie->gann_ie; 2569 ie->gann_len = gannie->gann_len; 2570 ie->gann_flags = gannie->gann_flags; 2571 ie->gann_hopcount = gannie->gann_hopcount; 2572 ie->gann_ttl = gannie->gann_ttl; 2573 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2574 ie->gann_seq = LE_READ_4(&gannie->gann_seq); 2575 ie->gann_interval = LE_READ_2(&gannie->gann_interval); 2576 break; 2577 } 2578 frm += frm[1] + 2; 2579 } 2580 2581 return 0; 2582 } 2583 2584 /* 2585 * Mesh Gate Announcement handling. 2586 */ 2587 static int 2588 mesh_recv_action_meshgate(struct ieee80211_node *ni, 2589 const struct ieee80211_frame *wh, 2590 const uint8_t *frm, const uint8_t *efrm) 2591 { 2592 struct ieee80211vap *vap = ni->ni_vap; 2593 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2594 struct ieee80211_mesh_gate_route *gr, *next; 2595 struct ieee80211_mesh_route *rt_gate; 2596 struct ieee80211_meshgann_ie pgann; 2597 struct ieee80211_meshgann_ie ie; 2598 int found = 0; 2599 2600 /* +2 for action + code */ 2601 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2602 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2603 ni->ni_macaddr, NULL, "%s", 2604 "GANN parsing failed"); 2605 vap->iv_stats.is_rx_mgtdiscard++; 2606 return (0); 2607 } 2608 2609 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2610 return 0; 2611 2612 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2613 "received GANN, meshgate: %s (seq %u)", 2614 ether_sprintf(ie.gann_addr), 2615 ie.gann_seq); 2616 2617 if (ms == NULL) 2618 return (0); 2619 MESH_RT_LOCK(ms); 2620 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2621 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2622 continue; 2623 if (ie.gann_seq <= gr->gr_lastseq) { 2624 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2625 ni->ni_macaddr, NULL, 2626 "GANN old seqno %u <= %u", 2627 ie.gann_seq, gr->gr_lastseq); 2628 MESH_RT_UNLOCK(ms); 2629 return (0); 2630 } 2631 /* corresponding mesh gate found & GANN accepted */ 2632 found = 1; 2633 break; 2634 2635 } 2636 if (found == 0) { 2637 /* this GANN is from a new mesh Gate add it to known table. */ 2638 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2639 "stored new GANN information, seq %u.", ie.gann_seq); 2640 gr = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2641 M_80211_MESH_GT_RT, M_INTWAIT | M_ZERO); 2642 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2643 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2644 } 2645 gr->gr_lastseq = ie.gann_seq; 2646 2647 /* check if we have a path to this gate */ 2648 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2649 if (rt_gate != NULL && 2650 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2651 gr->gr_route = rt_gate; 2652 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2653 } 2654 2655 MESH_RT_UNLOCK(ms); 2656 2657 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2658 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2659 return 0; 2660 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2661 pgann.gann_hopcount = ie.gann_hopcount + 1; 2662 pgann.gann_ttl = ie.gann_ttl - 1; 2663 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2664 pgann.gann_seq = ie.gann_seq; 2665 pgann.gann_interval = ie.gann_interval; 2666 2667 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2668 "%s", "propagate GANN"); 2669 2670 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2671 IEEE80211_ACTION_MESH_GANN, &pgann); 2672 2673 return 0; 2674 } 2675 2676 static int 2677 mesh_send_action(struct ieee80211_node *ni, 2678 const uint8_t sa[IEEE80211_ADDR_LEN], 2679 const uint8_t da[IEEE80211_ADDR_LEN], 2680 struct mbuf *m) 2681 { 2682 struct ieee80211vap *vap = ni->ni_vap; 2683 struct ieee80211com *ic = ni->ni_ic; 2684 struct ieee80211_bpf_params params; 2685 struct ieee80211_frame *wh; 2686 int ret; 2687 2688 KASSERT(ni != NULL, ("null node")); 2689 2690 if (vap->iv_state == IEEE80211_S_CAC) { 2691 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2692 "block %s frame in CAC state", "Mesh action"); 2693 vap->iv_stats.is_tx_badstate++; 2694 ieee80211_free_node(ni); 2695 m_freem(m); 2696 return EIO; /* XXX */ 2697 } 2698 2699 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2700 if (m == NULL) { 2701 ieee80211_free_node(ni); 2702 return ENOMEM; 2703 } 2704 2705 IEEE80211_TX_LOCK(ic); 2706 wh = mtod(m, struct ieee80211_frame *); 2707 ieee80211_send_setup(ni, m, 2708 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2709 IEEE80211_NONQOS_TID, sa, da, sa); 2710 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2711 2712 memset(¶ms, 0, sizeof(params)); 2713 params.ibp_pri = WME_AC_VO; 2714 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2715 if (IEEE80211_IS_MULTICAST(da)) 2716 params.ibp_try0 = 1; 2717 else 2718 params.ibp_try0 = ni->ni_txparms->maxretry; 2719 params.ibp_power = ni->ni_txpower; 2720 2721 IEEE80211_NODE_STAT(ni, tx_mgmt); 2722 2723 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2724 IEEE80211_TX_UNLOCK(ic); 2725 return (ret); 2726 } 2727 2728 #define ADDSHORT(frm, v) do { \ 2729 frm[0] = (v) & 0xff; \ 2730 frm[1] = (v) >> 8; \ 2731 frm += 2; \ 2732 } while (0) 2733 #define ADDWORD(frm, v) do { \ 2734 frm[0] = (v) & 0xff; \ 2735 frm[1] = ((v) >> 8) & 0xff; \ 2736 frm[2] = ((v) >> 16) & 0xff; \ 2737 frm[3] = ((v) >> 24) & 0xff; \ 2738 frm += 4; \ 2739 } while (0) 2740 2741 static int 2742 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2743 int category, int action, void *args0) 2744 { 2745 struct ieee80211vap *vap = ni->ni_vap; 2746 struct ieee80211com *ic = ni->ni_ic; 2747 uint16_t *args = args0; 2748 const struct ieee80211_rateset *rs; 2749 struct mbuf *m; 2750 uint8_t *frm; 2751 2752 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2753 "send PEER OPEN action: localid 0x%x", args[0]); 2754 2755 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2756 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2757 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2758 ieee80211_ref_node(ni); 2759 2760 m = ieee80211_getmgtframe(&frm, 2761 ic->ic_headroom + sizeof(struct ieee80211_frame), 2762 sizeof(uint16_t) /* action+category */ 2763 + sizeof(uint16_t) /* capabilites */ 2764 + 2 + IEEE80211_RATE_SIZE 2765 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2766 + 2 + IEEE80211_MESHID_LEN 2767 + sizeof(struct ieee80211_meshconf_ie) 2768 + sizeof(struct ieee80211_meshpeer_ie) 2769 ); 2770 if (m != NULL) { 2771 /* 2772 * mesh peer open action frame format: 2773 * [1] category 2774 * [1] action 2775 * [2] capabilities 2776 * [tlv] rates 2777 * [tlv] xrates 2778 * [tlv] mesh id 2779 * [tlv] mesh conf 2780 * [tlv] mesh peer link mgmt 2781 */ 2782 *frm++ = category; 2783 *frm++ = action; 2784 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2785 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2786 frm = ieee80211_add_rates(frm, rs); 2787 frm = ieee80211_add_xrates(frm, rs); 2788 frm = ieee80211_add_meshid(frm, vap); 2789 frm = ieee80211_add_meshconf(frm, vap); 2790 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2791 args[0], 0, 0); 2792 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2793 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2794 } else { 2795 vap->iv_stats.is_tx_nobuf++; 2796 ieee80211_free_node(ni); 2797 return ENOMEM; 2798 } 2799 } 2800 2801 static int 2802 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2803 int category, int action, void *args0) 2804 { 2805 struct ieee80211vap *vap = ni->ni_vap; 2806 struct ieee80211com *ic = ni->ni_ic; 2807 uint16_t *args = args0; 2808 const struct ieee80211_rateset *rs; 2809 struct mbuf *m; 2810 uint8_t *frm; 2811 2812 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2813 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2814 args[0], args[1]); 2815 2816 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2817 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2818 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2819 ieee80211_ref_node(ni); 2820 2821 m = ieee80211_getmgtframe(&frm, 2822 ic->ic_headroom + sizeof(struct ieee80211_frame), 2823 sizeof(uint16_t) /* action+category */ 2824 + sizeof(uint16_t) /* capabilites */ 2825 + sizeof(uint16_t) /* status code */ 2826 + sizeof(uint16_t) /* AID */ 2827 + 2 + IEEE80211_RATE_SIZE 2828 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2829 + 2 + IEEE80211_MESHID_LEN 2830 + sizeof(struct ieee80211_meshconf_ie) 2831 + sizeof(struct ieee80211_meshpeer_ie) 2832 ); 2833 if (m != NULL) { 2834 /* 2835 * mesh peer confirm action frame format: 2836 * [1] category 2837 * [1] action 2838 * [2] capabilities 2839 * [2] status code 2840 * [2] association id (peer ID) 2841 * [tlv] rates 2842 * [tlv] xrates 2843 * [tlv] mesh id 2844 * [tlv] mesh conf 2845 * [tlv] mesh peer link mgmt 2846 */ 2847 *frm++ = category; 2848 *frm++ = action; 2849 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2850 ADDSHORT(frm, 0); /* status code */ 2851 ADDSHORT(frm, args[1]); /* AID */ 2852 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2853 frm = ieee80211_add_rates(frm, rs); 2854 frm = ieee80211_add_xrates(frm, rs); 2855 frm = ieee80211_add_meshid(frm, vap); 2856 frm = ieee80211_add_meshconf(frm, vap); 2857 frm = ieee80211_add_meshpeer(frm, 2858 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2859 args[0], args[1], 0); 2860 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2861 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2862 } else { 2863 vap->iv_stats.is_tx_nobuf++; 2864 ieee80211_free_node(ni); 2865 return ENOMEM; 2866 } 2867 } 2868 2869 static int 2870 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2871 int category, int action, void *args0) 2872 { 2873 struct ieee80211vap *vap = ni->ni_vap; 2874 struct ieee80211com *ic = ni->ni_ic; 2875 uint16_t *args = args0; 2876 struct mbuf *m; 2877 uint8_t *frm; 2878 2879 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2880 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2881 args[0], args[1], args[2]); 2882 2883 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2884 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2885 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2886 ieee80211_ref_node(ni); 2887 2888 m = ieee80211_getmgtframe(&frm, 2889 ic->ic_headroom + sizeof(struct ieee80211_frame), 2890 sizeof(uint16_t) /* action+category */ 2891 + sizeof(uint16_t) /* reason code */ 2892 + 2 + IEEE80211_MESHID_LEN 2893 + sizeof(struct ieee80211_meshpeer_ie) 2894 ); 2895 if (m != NULL) { 2896 /* 2897 * mesh peer close action frame format: 2898 * [1] category 2899 * [1] action 2900 * [tlv] mesh id 2901 * [tlv] mesh peer link mgmt 2902 */ 2903 *frm++ = category; 2904 *frm++ = action; 2905 frm = ieee80211_add_meshid(frm, vap); 2906 frm = ieee80211_add_meshpeer(frm, 2907 IEEE80211_ACTION_MESHPEERING_CLOSE, 2908 args[0], args[1], args[2]); 2909 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2910 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2911 } else { 2912 vap->iv_stats.is_tx_nobuf++; 2913 ieee80211_free_node(ni); 2914 return ENOMEM; 2915 } 2916 } 2917 2918 static int 2919 mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2920 int category, int action, void *arg0) 2921 { 2922 struct ieee80211vap *vap = ni->ni_vap; 2923 struct ieee80211com *ic = ni->ni_ic; 2924 struct ieee80211_meshlmetric_ie *ie = arg0; 2925 struct mbuf *m; 2926 uint8_t *frm; 2927 2928 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2929 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2930 ni, "%s", "send LINK METRIC REQUEST action"); 2931 } else { 2932 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2933 ni, "send LINK METRIC REPLY action: metric 0x%x", 2934 ie->lm_metric); 2935 } 2936 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2937 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2938 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2939 ieee80211_ref_node(ni); 2940 2941 m = ieee80211_getmgtframe(&frm, 2942 ic->ic_headroom + sizeof(struct ieee80211_frame), 2943 sizeof(uint16_t) + /* action+category */ 2944 sizeof(struct ieee80211_meshlmetric_ie) 2945 ); 2946 if (m != NULL) { 2947 /* 2948 * mesh link metric 2949 * [1] category 2950 * [1] action 2951 * [tlv] mesh link metric 2952 */ 2953 *frm++ = category; 2954 *frm++ = action; 2955 frm = ieee80211_add_meshlmetric(frm, 2956 ie->lm_flags, ie->lm_metric); 2957 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2958 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2959 } else { 2960 vap->iv_stats.is_tx_nobuf++; 2961 ieee80211_free_node(ni); 2962 return ENOMEM; 2963 } 2964 } 2965 2966 static int 2967 mesh_send_action_meshgate(struct ieee80211_node *ni, 2968 int category, int action, void *arg0) 2969 { 2970 struct ieee80211vap *vap = ni->ni_vap; 2971 struct ieee80211com *ic = ni->ni_ic; 2972 struct ieee80211_meshgann_ie *ie = arg0; 2973 struct mbuf *m; 2974 uint8_t *frm; 2975 2976 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2977 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2978 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2979 ieee80211_ref_node(ni); 2980 2981 m = ieee80211_getmgtframe(&frm, 2982 ic->ic_headroom + sizeof(struct ieee80211_frame), 2983 sizeof(uint16_t) + /* action+category */ 2984 IEEE80211_MESHGANN_BASE_SZ 2985 ); 2986 if (m != NULL) { 2987 /* 2988 * mesh link metric 2989 * [1] category 2990 * [1] action 2991 * [tlv] mesh gate annoucement 2992 */ 2993 *frm++ = category; 2994 *frm++ = action; 2995 frm = ieee80211_add_meshgate(frm, ie); 2996 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2997 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 2998 } else { 2999 vap->iv_stats.is_tx_nobuf++; 3000 ieee80211_free_node(ni); 3001 return ENOMEM; 3002 } 3003 } 3004 3005 static void 3006 mesh_peer_timeout_setup(struct ieee80211_node *ni) 3007 { 3008 switch (ni->ni_mlstate) { 3009 case IEEE80211_NODE_MESH_HOLDING: 3010 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 3011 break; 3012 case IEEE80211_NODE_MESH_CONFIRMRCV: 3013 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 3014 break; 3015 case IEEE80211_NODE_MESH_IDLE: 3016 ni->ni_mltval = 0; 3017 break; 3018 default: 3019 ni->ni_mltval = ieee80211_mesh_retrytimeout; 3020 break; 3021 } 3022 if (ni->ni_mltval) 3023 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 3024 mesh_peer_timeout_cb, ni); 3025 } 3026 3027 /* 3028 * Same as above but backoffs timer statisically 50%. 3029 */ 3030 static void 3031 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3032 { 3033 uint32_t r; 3034 3035 r = arc4random(); 3036 ni->ni_mltval += r % ni->ni_mltval; 3037 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3038 ni); 3039 } 3040 3041 static __inline void 3042 mesh_peer_timeout_stop(struct ieee80211_node *ni) 3043 { 3044 callout_drain(&ni->ni_mltimer); 3045 } 3046 3047 static void 3048 mesh_peer_backoff_cb(void *arg) 3049 { 3050 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3051 3052 /* After backoff timeout, try to peer automatically again. */ 3053 ni->ni_mlhcnt = 0; 3054 } 3055 3056 /* 3057 * Mesh Peer Link Management FSM timeout handling. 3058 */ 3059 static void 3060 mesh_peer_timeout_cb(void *arg) 3061 { 3062 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3063 uint16_t args[3]; 3064 3065 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3066 ni, "mesh link timeout, state %d, retry counter %d", 3067 ni->ni_mlstate, ni->ni_mlrcnt); 3068 3069 switch (ni->ni_mlstate) { 3070 case IEEE80211_NODE_MESH_IDLE: 3071 case IEEE80211_NODE_MESH_ESTABLISHED: 3072 break; 3073 case IEEE80211_NODE_MESH_OPENSNT: 3074 case IEEE80211_NODE_MESH_OPENRCV: 3075 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3076 args[0] = ni->ni_mlpid; 3077 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3078 ieee80211_send_action(ni, 3079 IEEE80211_ACTION_CAT_SELF_PROT, 3080 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3081 ni->ni_mlrcnt = 0; 3082 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3083 mesh_peer_timeout_setup(ni); 3084 } else { 3085 args[0] = ni->ni_mlpid; 3086 ieee80211_send_action(ni, 3087 IEEE80211_ACTION_CAT_SELF_PROT, 3088 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3089 ni->ni_mlrcnt++; 3090 mesh_peer_timeout_backoff(ni); 3091 } 3092 break; 3093 case IEEE80211_NODE_MESH_CONFIRMRCV: 3094 args[0] = ni->ni_mlpid; 3095 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3096 ieee80211_send_action(ni, 3097 IEEE80211_ACTION_CAT_SELF_PROT, 3098 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3099 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3100 mesh_peer_timeout_setup(ni); 3101 break; 3102 case IEEE80211_NODE_MESH_HOLDING: 3103 ni->ni_mlhcnt++; 3104 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3105 callout_reset(&ni->ni_mlhtimer, 3106 ieee80211_mesh_backofftimeout, 3107 mesh_peer_backoff_cb, ni); 3108 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3109 break; 3110 } 3111 } 3112 3113 static int 3114 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3115 { 3116 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3117 3118 if (ie == NULL || ie[1] != ms->ms_idlen) 3119 return 1; 3120 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3121 } 3122 3123 /* 3124 * Check if we are using the same algorithms for this mesh. 3125 */ 3126 static int 3127 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3128 { 3129 const struct ieee80211_meshconf_ie *meshconf = 3130 (const struct ieee80211_meshconf_ie *) ie; 3131 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3132 3133 if (meshconf == NULL) 3134 return 1; 3135 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3136 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3137 "unknown path selection algorithm: 0x%x\n", 3138 meshconf->conf_pselid); 3139 return 1; 3140 } 3141 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3142 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3143 "unknown path metric algorithm: 0x%x\n", 3144 meshconf->conf_pmetid); 3145 return 1; 3146 } 3147 if (meshconf->conf_ccid != 0) { 3148 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3149 "unknown congestion control algorithm: 0x%x\n", 3150 meshconf->conf_ccid); 3151 return 1; 3152 } 3153 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3154 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3155 "unknown sync algorithm: 0x%x\n", 3156 meshconf->conf_syncid); 3157 return 1; 3158 } 3159 if (meshconf->conf_authid != 0) { 3160 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3161 "unknown auth auth algorithm: 0x%x\n", 3162 meshconf->conf_pselid); 3163 return 1; 3164 } 3165 /* Not accepting peers */ 3166 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3167 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3168 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3169 return 1; 3170 } 3171 return 0; 3172 } 3173 3174 static int 3175 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3176 const uint8_t *ie) 3177 { 3178 const struct ieee80211_meshpeer_ie *meshpeer = 3179 (const struct ieee80211_meshpeer_ie *) ie; 3180 3181 if (meshpeer == NULL || 3182 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3183 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3184 return 1; 3185 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3186 IEEE80211_DPRINTF(vap, 3187 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3188 "Only MPM protocol is supported (proto: 0x%02X)", 3189 meshpeer->peer_proto); 3190 return 1; 3191 } 3192 switch (subtype) { 3193 case IEEE80211_ACTION_MESHPEERING_OPEN: 3194 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3195 return 1; 3196 break; 3197 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3198 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3199 return 1; 3200 break; 3201 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3202 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3203 return 1; 3204 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3205 meshpeer->peer_linkid != 0) 3206 return 1; 3207 if (meshpeer->peer_rcode == 0) 3208 return 1; 3209 break; 3210 } 3211 return 0; 3212 } 3213 3214 /* 3215 * Add a Mesh ID IE to a frame. 3216 */ 3217 uint8_t * 3218 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3219 { 3220 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3221 3222 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3223 3224 *frm++ = IEEE80211_ELEMID_MESHID; 3225 *frm++ = ms->ms_idlen; 3226 memcpy(frm, ms->ms_id, ms->ms_idlen); 3227 return frm + ms->ms_idlen; 3228 } 3229 3230 /* 3231 * Add a Mesh Configuration IE to a frame. 3232 * For now just use HWMP routing, Airtime link metric, Null Congestion 3233 * Signaling, Null Sync Protocol and Null Authentication. 3234 */ 3235 uint8_t * 3236 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3237 { 3238 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3239 uint16_t caps; 3240 3241 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3242 3243 *frm++ = IEEE80211_ELEMID_MESHCONF; 3244 *frm++ = IEEE80211_MESH_CONF_SZ; 3245 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3246 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3247 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3248 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3249 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3250 /* NB: set the number of neighbors before the rest */ 3251 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3252 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3253 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3254 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3255 frm += 1; 3256 caps = 0; 3257 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3258 caps |= IEEE80211_MESHCONF_CAP_AP; 3259 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3260 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3261 *frm++ = caps; 3262 return frm; 3263 } 3264 3265 /* 3266 * Add a Mesh Peer Management IE to a frame. 3267 */ 3268 uint8_t * 3269 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3270 uint16_t peerid, uint16_t reason) 3271 { 3272 3273 KASSERT(localid != 0, ("localid == 0")); 3274 3275 *frm++ = IEEE80211_ELEMID_MESHPEER; 3276 switch (subtype) { 3277 case IEEE80211_ACTION_MESHPEERING_OPEN: 3278 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3279 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3280 ADDSHORT(frm, localid); /* local ID */ 3281 break; 3282 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3283 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3284 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3285 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3286 ADDSHORT(frm, localid); /* local ID */ 3287 ADDSHORT(frm, peerid); /* peer ID */ 3288 break; 3289 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3290 if (peerid) 3291 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3292 else 3293 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3294 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3295 ADDSHORT(frm, localid); /* local ID */ 3296 if (peerid) 3297 ADDSHORT(frm, peerid); /* peer ID */ 3298 ADDSHORT(frm, reason); 3299 break; 3300 } 3301 return frm; 3302 } 3303 3304 /* 3305 * Compute an Airtime Link Metric for the link with this node. 3306 * 3307 * Based on Draft 3.0 spec (11B.10, p.149). 3308 */ 3309 /* 3310 * Max 802.11s overhead. 3311 */ 3312 #define IEEE80211_MESH_MAXOVERHEAD \ 3313 (sizeof(struct ieee80211_qosframe_addr4) \ 3314 + sizeof(struct ieee80211_meshcntl_ae10) \ 3315 + sizeof(struct llc) \ 3316 + IEEE80211_ADDR_LEN \ 3317 + IEEE80211_WEP_IVLEN \ 3318 + IEEE80211_WEP_KIDLEN \ 3319 + IEEE80211_WEP_CRCLEN \ 3320 + IEEE80211_WEP_MICLEN \ 3321 + IEEE80211_CRC_LEN) 3322 uint32_t 3323 mesh_airtime_calc(struct ieee80211_node *ni) 3324 { 3325 #define M_BITS 8 3326 #define S_FACTOR (2 * M_BITS) 3327 struct ieee80211com *ic = ni->ni_ic; 3328 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3329 static const int nbits = 8192 << M_BITS; 3330 uint32_t overhead, rate, errrate; 3331 uint64_t res; 3332 3333 /* Time to transmit a frame */ 3334 rate = ni->ni_txrate; 3335 overhead = ieee80211_compute_duration(ic->ic_rt, 3336 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3337 /* Error rate in percentage */ 3338 /* XXX assuming small failures are ok */ 3339 #if defined(__DragonFly__) 3340 u_long icount; 3341 u_long ocount; 3342 IFNET_STAT_GET(ifp, ierrors, icount); 3343 IFNET_STAT_GET(ifp, oerrors, ocount); 3344 errrate = (((ocount + icount) / 100) << M_BITS) 3345 / 100; 3346 #else 3347 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + 3348 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) 3349 / 100; 3350 #endif 3351 res = (overhead + (nbits / rate)) * 3352 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3353 3354 return (uint32_t)(res >> S_FACTOR); 3355 #undef M_BITS 3356 #undef S_FACTOR 3357 } 3358 3359 /* 3360 * Add a Mesh Link Metric report IE to a frame. 3361 */ 3362 uint8_t * 3363 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3364 { 3365 *frm++ = IEEE80211_ELEMID_MESHLINK; 3366 *frm++ = 5; 3367 *frm++ = flags; 3368 ADDWORD(frm, metric); 3369 return frm; 3370 } 3371 3372 /* 3373 * Add a Mesh Gate Announcement IE to a frame. 3374 */ 3375 uint8_t * 3376 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3377 { 3378 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3379 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3380 *frm++ = ie->gann_flags; 3381 *frm++ = ie->gann_hopcount; 3382 *frm++ = ie->gann_ttl; 3383 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3384 frm += 6; 3385 ADDWORD(frm, ie->gann_seq); 3386 ADDSHORT(frm, ie->gann_interval); 3387 return frm; 3388 } 3389 #undef ADDSHORT 3390 #undef ADDWORD 3391 3392 /* 3393 * Initialize any mesh-specific node state. 3394 */ 3395 void 3396 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3397 { 3398 ni->ni_flags |= IEEE80211_NODE_QOS; 3399 callout_init_mp(&ni->ni_mltimer); 3400 callout_init_mp(&ni->ni_mlhtimer); 3401 } 3402 3403 /* 3404 * Cleanup any mesh-specific node state. 3405 */ 3406 void 3407 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3408 { 3409 struct ieee80211vap *vap = ni->ni_vap; 3410 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3411 3412 callout_drain(&ni->ni_mltimer); 3413 callout_drain(&ni->ni_mlhtimer); 3414 /* NB: short-circuit callbacks after mesh_vdetach */ 3415 if (vap->iv_mesh != NULL) 3416 ms->ms_ppath->mpp_peerdown(ni); 3417 } 3418 3419 void 3420 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3421 { 3422 ni->ni_meshidlen = ie[1]; 3423 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3424 } 3425 3426 /* 3427 * Setup mesh-specific node state on neighbor discovery. 3428 */ 3429 void 3430 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3431 const struct ieee80211_frame *wh, 3432 const struct ieee80211_scanparams *sp) 3433 { 3434 ieee80211_parse_meshid(ni, sp->meshid); 3435 } 3436 3437 void 3438 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3439 struct ieee80211_beacon_offsets *bo) 3440 { 3441 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3442 3443 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3444 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3445 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3446 } 3447 } 3448 3449 static int 3450 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3451 { 3452 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3453 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3454 struct ieee80211_mesh_route *rt; 3455 struct ieee80211req_mesh_route *imr; 3456 size_t len, off; 3457 uint8_t *p; 3458 int error; 3459 3460 if (vap->iv_opmode != IEEE80211_M_MBSS) 3461 return ENOSYS; 3462 3463 error = 0; 3464 switch (ireq->i_type) { 3465 case IEEE80211_IOC_MESH_ID: 3466 ireq->i_len = ms->ms_idlen; 3467 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3468 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3469 break; 3470 case IEEE80211_IOC_MESH_AP: 3471 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3472 break; 3473 case IEEE80211_IOC_MESH_FWRD: 3474 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3475 break; 3476 case IEEE80211_IOC_MESH_GATE: 3477 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3478 break; 3479 case IEEE80211_IOC_MESH_TTL: 3480 ireq->i_val = ms->ms_ttl; 3481 break; 3482 case IEEE80211_IOC_MESH_RTCMD: 3483 switch (ireq->i_val) { 3484 case IEEE80211_MESH_RTCMD_LIST: 3485 len = 0; 3486 MESH_RT_LOCK(ms); 3487 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3488 len += sizeof(*imr); 3489 } 3490 MESH_RT_UNLOCK(ms); 3491 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3492 ireq->i_len = len; 3493 return ENOMEM; 3494 } 3495 ireq->i_len = len; 3496 /* XXX M_WAIT? */ 3497 p = kmalloc(len, M_TEMP, M_INTWAIT | M_ZERO); 3498 if (p == NULL) 3499 return ENOMEM; 3500 off = 0; 3501 MESH_RT_LOCK(ms); 3502 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3503 if (off >= len) 3504 break; 3505 imr = (struct ieee80211req_mesh_route *) 3506 (p + off); 3507 IEEE80211_ADDR_COPY(imr->imr_dest, 3508 rt->rt_dest); 3509 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3510 rt->rt_nexthop); 3511 imr->imr_metric = rt->rt_metric; 3512 imr->imr_nhops = rt->rt_nhops; 3513 imr->imr_lifetime = 3514 ieee80211_mesh_rt_update(rt, 0); 3515 imr->imr_lastmseq = rt->rt_lastmseq; 3516 imr->imr_flags = rt->rt_flags; /* last */ 3517 off += sizeof(*imr); 3518 } 3519 MESH_RT_UNLOCK(ms); 3520 error = copyout(p, (uint8_t *)ireq->i_data, 3521 ireq->i_len); 3522 kfree(p, M_TEMP); 3523 break; 3524 case IEEE80211_MESH_RTCMD_FLUSH: 3525 case IEEE80211_MESH_RTCMD_ADD: 3526 case IEEE80211_MESH_RTCMD_DELETE: 3527 return EINVAL; 3528 default: 3529 return ENOSYS; 3530 } 3531 break; 3532 case IEEE80211_IOC_MESH_PR_METRIC: 3533 len = strlen(ms->ms_pmetric->mpm_descr); 3534 if (ireq->i_len < len) 3535 return EINVAL; 3536 ireq->i_len = len; 3537 error = copyout(ms->ms_pmetric->mpm_descr, 3538 (uint8_t *)ireq->i_data, len); 3539 break; 3540 case IEEE80211_IOC_MESH_PR_PATH: 3541 len = strlen(ms->ms_ppath->mpp_descr); 3542 if (ireq->i_len < len) 3543 return EINVAL; 3544 ireq->i_len = len; 3545 error = copyout(ms->ms_ppath->mpp_descr, 3546 (uint8_t *)ireq->i_data, len); 3547 break; 3548 default: 3549 return ENOSYS; 3550 } 3551 3552 return error; 3553 } 3554 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3555 3556 static int 3557 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3558 { 3559 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3560 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3561 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3562 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3563 int error; 3564 3565 if (vap->iv_opmode != IEEE80211_M_MBSS) 3566 return ENOSYS; 3567 3568 error = 0; 3569 switch (ireq->i_type) { 3570 case IEEE80211_IOC_MESH_ID: 3571 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3572 return EINVAL; 3573 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3574 if (error != 0) 3575 break; 3576 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3577 ms->ms_idlen = ireq->i_len; 3578 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3579 error = ENETRESET; 3580 break; 3581 case IEEE80211_IOC_MESH_AP: 3582 if (ireq->i_val) 3583 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3584 else 3585 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3586 error = ENETRESET; 3587 break; 3588 case IEEE80211_IOC_MESH_FWRD: 3589 if (ireq->i_val) 3590 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3591 else 3592 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3593 mesh_gatemode_setup(vap); 3594 break; 3595 case IEEE80211_IOC_MESH_GATE: 3596 if (ireq->i_val) 3597 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3598 else 3599 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3600 break; 3601 case IEEE80211_IOC_MESH_TTL: 3602 ms->ms_ttl = (uint8_t) ireq->i_val; 3603 break; 3604 case IEEE80211_IOC_MESH_RTCMD: 3605 switch (ireq->i_val) { 3606 case IEEE80211_MESH_RTCMD_LIST: 3607 return EINVAL; 3608 case IEEE80211_MESH_RTCMD_FLUSH: 3609 ieee80211_mesh_rt_flush(vap); 3610 break; 3611 case IEEE80211_MESH_RTCMD_ADD: 3612 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3613 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3614 return EINVAL; 3615 error = copyin(ireq->i_data, &tmpaddr, 3616 IEEE80211_ADDR_LEN); 3617 if (error == 0) 3618 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3619 break; 3620 case IEEE80211_MESH_RTCMD_DELETE: 3621 ieee80211_mesh_rt_del(vap, ireq->i_data); 3622 break; 3623 default: 3624 return ENOSYS; 3625 } 3626 break; 3627 case IEEE80211_IOC_MESH_PR_METRIC: 3628 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3629 if (error == 0) { 3630 error = mesh_select_proto_metric(vap, tmpproto); 3631 if (error == 0) 3632 error = ENETRESET; 3633 } 3634 break; 3635 case IEEE80211_IOC_MESH_PR_PATH: 3636 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3637 if (error == 0) { 3638 error = mesh_select_proto_path(vap, tmpproto); 3639 if (error == 0) 3640 error = ENETRESET; 3641 } 3642 break; 3643 default: 3644 return ENOSYS; 3645 } 3646 return error; 3647 } 3648 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3649