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 #if defined(__DragonFly__) 207 rt = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_route)) + 208 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_INTWAIT | M_ZERO); 209 #else 210 rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) + 211 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, 212 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 213 #endif 214 if (rt != NULL) { 215 rt->rt_vap = vap; 216 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 217 rt->rt_priv = (void *)ALIGN(&rt[1]); 218 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT"); 219 #if defined(__DragonFly__) 220 callout_init_mp(&rt->rt_discovery); 221 #else 222 callout_init(&rt->rt_discovery, 1); 223 #endif 224 rt->rt_updtime = ticks; /* create time */ 225 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 226 } 227 return rt; 228 } 229 230 struct ieee80211_mesh_route * 231 ieee80211_mesh_rt_find(struct ieee80211vap *vap, 232 const uint8_t dest[IEEE80211_ADDR_LEN]) 233 { 234 struct ieee80211_mesh_state *ms = vap->iv_mesh; 235 struct ieee80211_mesh_route *rt; 236 237 MESH_RT_LOCK(ms); 238 rt = mesh_rt_find_locked(ms, dest); 239 MESH_RT_UNLOCK(ms); 240 return rt; 241 } 242 243 struct ieee80211_mesh_route * 244 ieee80211_mesh_rt_add(struct ieee80211vap *vap, 245 const uint8_t dest[IEEE80211_ADDR_LEN]) 246 { 247 struct ieee80211_mesh_state *ms = vap->iv_mesh; 248 struct ieee80211_mesh_route *rt; 249 250 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 251 ("%s: duplicate entry in the routing table", __func__)); 252 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 253 ("%s: adding self to the routing table", __func__)); 254 255 MESH_RT_LOCK(ms); 256 rt = mesh_rt_add_locked(vap, dest); 257 MESH_RT_UNLOCK(ms); 258 return rt; 259 } 260 261 /* 262 * Update the route lifetime and returns the updated lifetime. 263 * If new_lifetime is zero and route is timedout it will be invalidated. 264 * new_lifetime is in msec 265 */ 266 int 267 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime) 268 { 269 int timesince, now; 270 uint32_t lifetime = 0; 271 272 KASSERT(rt != NULL, ("route is NULL")); 273 274 now = ticks; 275 MESH_RT_ENTRY_LOCK(rt); 276 277 /* dont clobber a proxy entry gated by us */ 278 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) { 279 MESH_RT_ENTRY_UNLOCK(rt); 280 return rt->rt_lifetime; 281 } 282 283 timesince = ticks_to_msecs(now - rt->rt_updtime); 284 rt->rt_updtime = now; 285 if (timesince >= rt->rt_lifetime) { 286 if (new_lifetime != 0) { 287 rt->rt_lifetime = new_lifetime; 288 } 289 else { 290 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 291 rt->rt_lifetime = 0; 292 } 293 } else { 294 /* update what is left of lifetime */ 295 rt->rt_lifetime = rt->rt_lifetime - timesince; 296 rt->rt_lifetime = MESH_ROUTE_LIFETIME_MAX( 297 new_lifetime, rt->rt_lifetime); 298 } 299 lifetime = rt->rt_lifetime; 300 MESH_RT_ENTRY_UNLOCK(rt); 301 302 return lifetime; 303 } 304 305 /* 306 * Add a proxy route (as needed) for the specified destination. 307 */ 308 void 309 ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 310 const uint8_t dest[IEEE80211_ADDR_LEN]) 311 { 312 struct ieee80211_mesh_state *ms = vap->iv_mesh; 313 struct ieee80211_mesh_route *rt; 314 315 MESH_RT_LOCK(ms); 316 rt = mesh_rt_find_locked(ms, dest); 317 if (rt == NULL) { 318 rt = mesh_rt_add_locked(vap, dest); 319 if (rt == NULL) { 320 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 321 "%s", "unable to add proxy entry"); 322 vap->iv_stats.is_mesh_rtaddfailed++; 323 } else { 324 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 325 "%s", "add proxy entry"); 326 IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr); 327 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 328 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 329 | IEEE80211_MESHRT_FLAGS_PROXY; 330 } 331 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 332 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 333 ("no proxy flag for poxy entry")); 334 struct ieee80211com *ic = vap->iv_ic; 335 /* 336 * Fix existing entry created by received frames from 337 * stations that have some memory of dest. We also 338 * flush any frames held on the staging queue; delivering 339 * them is too much trouble right now. 340 */ 341 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 342 "%s", "fix proxy entry"); 343 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 344 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 345 | IEEE80211_MESHRT_FLAGS_PROXY; 346 /* XXX belongs in hwmp */ 347 ieee80211_ageq_drain_node(&ic->ic_stageq, 348 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 349 /* XXX stat? */ 350 } 351 MESH_RT_UNLOCK(ms); 352 } 353 354 static __inline void 355 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 356 { 357 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 358 /* 359 * Grab the lock before destroying it, to be sure no one else 360 * is holding the route. 361 */ 362 MESH_RT_ENTRY_LOCK(rt); 363 callout_drain(&rt->rt_discovery); 364 MESH_RT_ENTRY_LOCK_DESTROY(rt); 365 IEEE80211_FREE(rt, M_80211_MESH_RT); 366 } 367 368 void 369 ieee80211_mesh_rt_del(struct ieee80211vap *vap, 370 const uint8_t dest[IEEE80211_ADDR_LEN]) 371 { 372 struct ieee80211_mesh_state *ms = vap->iv_mesh; 373 struct ieee80211_mesh_route *rt, *next; 374 375 MESH_RT_LOCK(ms); 376 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 377 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 378 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 379 ms->ms_ppath->mpp_senderror(vap, dest, rt, 380 IEEE80211_REASON_MESH_PERR_NO_PROXY); 381 } else { 382 ms->ms_ppath->mpp_senderror(vap, dest, rt, 383 IEEE80211_REASON_MESH_PERR_DEST_UNREACH); 384 } 385 mesh_rt_del(ms, rt); 386 MESH_RT_UNLOCK(ms); 387 return; 388 } 389 } 390 MESH_RT_UNLOCK(ms); 391 } 392 393 void 394 ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 395 { 396 struct ieee80211_mesh_state *ms = vap->iv_mesh; 397 struct ieee80211_mesh_route *rt, *next; 398 399 if (ms == NULL) 400 return; 401 MESH_RT_LOCK(ms); 402 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) 403 mesh_rt_del(ms, rt); 404 MESH_RT_UNLOCK(ms); 405 } 406 407 void 408 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 409 const uint8_t peer[IEEE80211_ADDR_LEN]) 410 { 411 struct ieee80211_mesh_state *ms = vap->iv_mesh; 412 struct ieee80211_mesh_route *rt, *next; 413 414 MESH_RT_LOCK(ms); 415 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 416 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 417 mesh_rt_del(ms, rt); 418 } 419 MESH_RT_UNLOCK(ms); 420 } 421 422 /* 423 * Flush expired routing entries, i.e. those in invalid state for 424 * some time. 425 */ 426 static void 427 mesh_rt_flush_invalid(struct ieee80211vap *vap) 428 { 429 struct ieee80211_mesh_state *ms = vap->iv_mesh; 430 struct ieee80211_mesh_route *rt, *next; 431 432 if (ms == NULL) 433 return; 434 MESH_RT_LOCK(ms); 435 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 436 /* Discover paths will be deleted by their own callout */ 437 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) 438 continue; 439 ieee80211_mesh_rt_update(rt, 0); 440 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 441 mesh_rt_del(ms, rt); 442 } 443 MESH_RT_UNLOCK(ms); 444 } 445 446 int 447 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 448 { 449 int i, firstempty = -1; 450 451 for (i = 0; i < nitems(mesh_proto_paths); i++) { 452 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 453 IEEE80211_MESH_PROTO_DSZ) == 0) 454 return EEXIST; 455 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 456 firstempty = i; 457 } 458 if (firstempty < 0) 459 return ENOSPC; 460 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 461 mesh_proto_paths[firstempty].mpp_active = 1; 462 return 0; 463 } 464 465 int 466 ieee80211_mesh_register_proto_metric(const struct 467 ieee80211_mesh_proto_metric *mpm) 468 { 469 int i, firstempty = -1; 470 471 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 472 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 473 IEEE80211_MESH_PROTO_DSZ) == 0) 474 return EEXIST; 475 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 476 firstempty = i; 477 } 478 if (firstempty < 0) 479 return ENOSPC; 480 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 481 mesh_proto_metrics[firstempty].mpm_active = 1; 482 return 0; 483 } 484 485 static int 486 mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 487 { 488 struct ieee80211_mesh_state *ms = vap->iv_mesh; 489 int i; 490 491 for (i = 0; i < nitems(mesh_proto_paths); i++) { 492 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 493 ms->ms_ppath = &mesh_proto_paths[i]; 494 return 0; 495 } 496 } 497 return ENOENT; 498 } 499 500 static int 501 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 502 { 503 struct ieee80211_mesh_state *ms = vap->iv_mesh; 504 int i; 505 506 for (i = 0; i < nitems(mesh_proto_metrics); i++) { 507 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 508 ms->ms_pmetric = &mesh_proto_metrics[i]; 509 return 0; 510 } 511 } 512 return ENOENT; 513 } 514 515 static void 516 mesh_gatemode_setup(struct ieee80211vap *vap) 517 { 518 struct ieee80211_mesh_state *ms = vap->iv_mesh; 519 520 /* 521 * NB: When a mesh gate is running as a ROOT it shall 522 * not send out periodic GANNs but instead mark the 523 * mesh gate flag for the corresponding proactive PREQ 524 * and RANN frames. 525 */ 526 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT || 527 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) { 528 callout_drain(&ms->ms_gatetimer); 529 return ; 530 } 531 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint, 532 mesh_gatemode_cb, vap); 533 } 534 535 static void 536 mesh_gatemode_cb(void *arg) 537 { 538 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 539 struct ieee80211_mesh_state *ms = vap->iv_mesh; 540 struct ieee80211_meshgann_ie gann; 541 542 gann.gann_flags = 0; /* Reserved */ 543 gann.gann_hopcount = 0; 544 gann.gann_ttl = ms->ms_ttl; 545 IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr); 546 gann.gann_seq = ms->ms_gateseq++; 547 gann.gann_interval = ieee80211_mesh_gateint; 548 549 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss, 550 "send broadcast GANN (seq %u)", gann.gann_seq); 551 552 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 553 IEEE80211_ACTION_MESH_GANN, &gann); 554 mesh_gatemode_setup(vap); 555 } 556 557 static void 558 ieee80211_mesh_init(void) 559 { 560 561 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 562 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 563 564 /* 565 * Setup mesh parameters that depends on the clock frequency. 566 */ 567 ieee80211_mesh_gateint = msecs_to_ticks(10000); 568 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 569 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 570 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 571 ieee80211_mesh_backofftimeout = msecs_to_ticks(5000); 572 573 /* 574 * Register action frame handlers. 575 */ 576 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 577 IEEE80211_ACTION_MESHPEERING_OPEN, 578 mesh_recv_action_meshpeering_open); 579 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 580 IEEE80211_ACTION_MESHPEERING_CONFIRM, 581 mesh_recv_action_meshpeering_confirm); 582 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 583 IEEE80211_ACTION_MESHPEERING_CLOSE, 584 mesh_recv_action_meshpeering_close); 585 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 586 IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric); 587 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 588 IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate); 589 590 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 591 IEEE80211_ACTION_MESHPEERING_OPEN, 592 mesh_send_action_meshpeering_open); 593 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 594 IEEE80211_ACTION_MESHPEERING_CONFIRM, 595 mesh_send_action_meshpeering_confirm); 596 ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT, 597 IEEE80211_ACTION_MESHPEERING_CLOSE, 598 mesh_send_action_meshpeering_close); 599 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 600 IEEE80211_ACTION_MESH_LMETRIC, 601 mesh_send_action_meshlmetric); 602 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH, 603 IEEE80211_ACTION_MESH_GANN, 604 mesh_send_action_meshgate); 605 606 /* 607 * Register Airtime Link Metric. 608 */ 609 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 610 611 } 612 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 613 614 void 615 ieee80211_mesh_attach(struct ieee80211com *ic) 616 { 617 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 618 } 619 620 void 621 ieee80211_mesh_detach(struct ieee80211com *ic) 622 { 623 } 624 625 static void 626 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 627 { 628 struct ieee80211com *ic = ni->ni_ic; 629 uint16_t args[3]; 630 631 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 632 args[0] = ni->ni_mlpid; 633 args[1] = ni->ni_mllid; 634 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 635 ieee80211_send_action(ni, 636 IEEE80211_ACTION_CAT_SELF_PROT, 637 IEEE80211_ACTION_MESHPEERING_CLOSE, 638 args); 639 } 640 callout_drain(&ni->ni_mltimer); 641 /* XXX belongs in hwmp */ 642 ieee80211_ageq_drain_node(&ic->ic_stageq, 643 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 644 } 645 646 static void 647 mesh_vdetach(struct ieee80211vap *vap) 648 { 649 struct ieee80211_mesh_state *ms = vap->iv_mesh; 650 651 callout_drain(&ms->ms_cleantimer); 652 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 653 NULL); 654 ieee80211_mesh_rt_flush(vap); 655 MESH_RT_LOCK_DESTROY(ms); 656 ms->ms_ppath->mpp_vdetach(vap); 657 IEEE80211_FREE(vap->iv_mesh, M_80211_VAP); 658 vap->iv_mesh = NULL; 659 } 660 661 static void 662 mesh_vattach(struct ieee80211vap *vap) 663 { 664 struct ieee80211_mesh_state *ms; 665 vap->iv_newstate = mesh_newstate; 666 vap->iv_input = mesh_input; 667 vap->iv_opdetach = mesh_vdetach; 668 vap->iv_recv_mgmt = mesh_recv_mgmt; 669 vap->iv_recv_ctl = mesh_recv_ctl; 670 #if defined(__DragonFly__) 671 ms = kmalloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 672 M_INTWAIT | M_ZERO); 673 #else 674 ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 675 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 676 #endif 677 if (ms == NULL) { 678 kprintf("%s: couldn't alloc MBSS state\n", __func__); 679 return; 680 } 681 vap->iv_mesh = ms; 682 ms->ms_seq = 0; 683 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 684 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 685 TAILQ_INIT(&ms->ms_known_gates); 686 TAILQ_INIT(&ms->ms_routes); 687 MESH_RT_LOCK_INIT(ms, "MBSS"); 688 #if defined(__DragonFly__) 689 callout_init_mp(&ms->ms_cleantimer); 690 callout_init_mp(&ms->ms_gatetimer); 691 #else 692 callout_init(&ms->ms_cleantimer, 1); 693 callout_init(&ms->ms_gatetimer, 1); 694 #endif 695 ms->ms_gateseq = 0; 696 mesh_select_proto_metric(vap, "AIRTIME"); 697 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 698 mesh_select_proto_path(vap, "HWMP"); 699 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 700 ms->ms_ppath->mpp_vattach(vap); 701 } 702 703 /* 704 * IEEE80211_M_MBSS vap state machine handler. 705 */ 706 static int 707 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 708 { 709 struct ieee80211_mesh_state *ms = vap->iv_mesh; 710 struct ieee80211com *ic = vap->iv_ic; 711 struct ieee80211_node *ni; 712 enum ieee80211_state ostate; 713 714 IEEE80211_LOCK_ASSERT(ic); 715 716 ostate = vap->iv_state; 717 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 718 __func__, ieee80211_state_name[ostate], 719 ieee80211_state_name[nstate], arg); 720 vap->iv_state = nstate; /* state transition */ 721 if (ostate != IEEE80211_S_SCAN) 722 ieee80211_cancel_scan(vap); /* background scan */ 723 ni = vap->iv_bss; /* NB: no reference held */ 724 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) { 725 callout_drain(&ms->ms_cleantimer); 726 callout_drain(&ms->ms_gatetimer); 727 } 728 switch (nstate) { 729 case IEEE80211_S_INIT: 730 switch (ostate) { 731 case IEEE80211_S_SCAN: 732 ieee80211_cancel_scan(vap); 733 break; 734 case IEEE80211_S_CAC: 735 ieee80211_dfs_cac_stop(vap); 736 break; 737 case IEEE80211_S_RUN: 738 ieee80211_iterate_nodes(&ic->ic_sta, 739 mesh_vdetach_peers, NULL); 740 break; 741 default: 742 break; 743 } 744 if (ostate != IEEE80211_S_INIT) { 745 /* NB: optimize INIT -> INIT case */ 746 ieee80211_reset_bss(vap); 747 ieee80211_mesh_rt_flush(vap); 748 } 749 break; 750 case IEEE80211_S_SCAN: 751 switch (ostate) { 752 case IEEE80211_S_INIT: 753 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 754 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 755 ms->ms_idlen != 0) { 756 /* 757 * Already have a channel and a mesh ID; bypass 758 * the scan and startup immediately. 759 */ 760 ieee80211_create_ibss(vap, vap->iv_des_chan); 761 break; 762 } 763 /* 764 * Initiate a scan. We can come here as a result 765 * of an IEEE80211_IOC_SCAN_REQ too in which case 766 * the vap will be marked with IEEE80211_FEXT_SCANREQ 767 * and the scan request parameters will be present 768 * in iv_scanreq. Otherwise we do the default. 769 */ 770 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 771 ieee80211_check_scan(vap, 772 vap->iv_scanreq_flags, 773 vap->iv_scanreq_duration, 774 vap->iv_scanreq_mindwell, 775 vap->iv_scanreq_maxdwell, 776 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 777 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 778 } else 779 ieee80211_check_scan_current(vap); 780 break; 781 default: 782 break; 783 } 784 break; 785 case IEEE80211_S_CAC: 786 /* 787 * Start CAC on a DFS channel. We come here when starting 788 * a bss on a DFS channel (see ieee80211_create_ibss). 789 */ 790 ieee80211_dfs_cac_start(vap); 791 break; 792 case IEEE80211_S_RUN: 793 switch (ostate) { 794 case IEEE80211_S_INIT: 795 /* 796 * Already have a channel; bypass the 797 * scan and startup immediately. 798 * Note that ieee80211_create_ibss will call 799 * back to do a RUN->RUN state change. 800 */ 801 ieee80211_create_ibss(vap, 802 ieee80211_ht_adjust_channel(ic, 803 ic->ic_curchan, vap->iv_flags_ht)); 804 /* NB: iv_bss is changed on return */ 805 break; 806 case IEEE80211_S_CAC: 807 /* 808 * NB: This is the normal state change when CAC 809 * expires and no radar was detected; no need to 810 * clear the CAC timer as it's already expired. 811 */ 812 /* fall thru... */ 813 case IEEE80211_S_CSA: 814 #if 0 815 /* 816 * Shorten inactivity timer of associated stations 817 * to weed out sta's that don't follow a CSA. 818 */ 819 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 820 #endif 821 /* 822 * Update bss node channel to reflect where 823 * we landed after CSA. 824 */ 825 ieee80211_node_set_chan(vap->iv_bss, 826 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 827 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 828 /* XXX bypass debug msgs */ 829 break; 830 case IEEE80211_S_SCAN: 831 case IEEE80211_S_RUN: 832 #ifdef IEEE80211_DEBUG 833 if (ieee80211_msg_debug(vap)) { 834 struct ieee80211_node *ni = vap->iv_bss; 835 ieee80211_note(vap, 836 "synchronized with %s meshid ", 837 ether_sprintf(ni->ni_meshid)); 838 ieee80211_print_essid(ni->ni_meshid, 839 ni->ni_meshidlen); 840 /* XXX MCS/HT */ 841 kprintf(" channel %d\n", 842 ieee80211_chan2ieee(ic, ic->ic_curchan)); 843 } 844 #endif 845 break; 846 default: 847 break; 848 } 849 ieee80211_node_authorize(vap->iv_bss); 850 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 851 mesh_rt_cleanup_cb, vap); 852 mesh_gatemode_setup(vap); 853 break; 854 default: 855 break; 856 } 857 /* NB: ostate not nstate */ 858 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 859 return 0; 860 } 861 862 static void 863 mesh_rt_cleanup_cb(void *arg) 864 { 865 struct ieee80211vap *vap = arg; 866 struct ieee80211_mesh_state *ms = vap->iv_mesh; 867 868 mesh_rt_flush_invalid(vap); 869 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 870 mesh_rt_cleanup_cb, vap); 871 } 872 873 /* 874 * Mark a mesh STA as gate and return a pointer to it. 875 * If this is first time, we create a new gate route. 876 * Always update the path route to this mesh gate. 877 */ 878 struct ieee80211_mesh_gate_route * 879 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr, 880 struct ieee80211_mesh_route *rt) 881 { 882 struct ieee80211_mesh_state *ms = vap->iv_mesh; 883 struct ieee80211_mesh_gate_route *gr = NULL, *next; 884 int found = 0; 885 886 MESH_RT_LOCK(ms); 887 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 888 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) { 889 found = 1; 890 break; 891 } 892 } 893 894 if (!found) { 895 /* New mesh gate add it to known table. */ 896 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr, 897 "%s", "stored new gate information from pro-PREQ."); 898 #if defined(__DragonFly__) 899 gr = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 900 M_80211_MESH_GT_RT, M_INTWAIT | M_ZERO); 901 #else 902 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 903 M_80211_MESH_GT_RT, 904 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 905 #endif 906 IEEE80211_ADDR_COPY(gr->gr_addr, addr); 907 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 908 } 909 gr->gr_route = rt; 910 /* TODO: link from path route to gate route */ 911 MESH_RT_UNLOCK(ms); 912 913 return gr; 914 } 915 916 917 /* 918 * Helper function to note the Mesh Peer Link FSM change. 919 */ 920 static void 921 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 922 { 923 struct ieee80211vap *vap = ni->ni_vap; 924 struct ieee80211_mesh_state *ms = vap->iv_mesh; 925 #ifdef IEEE80211_DEBUG 926 static const char *meshlinkstates[] = { 927 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 928 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 929 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 930 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 931 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 932 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 933 }; 934 #endif 935 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 936 ni, "peer link: %s -> %s", 937 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 938 939 /* track neighbor count */ 940 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 941 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 942 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 943 ms->ms_neighbors++; 944 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 945 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 946 state != IEEE80211_NODE_MESH_ESTABLISHED) { 947 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 948 ms->ms_neighbors--; 949 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 950 } 951 ni->ni_mlstate = state; 952 switch (state) { 953 case IEEE80211_NODE_MESH_HOLDING: 954 ms->ms_ppath->mpp_peerdown(ni); 955 break; 956 case IEEE80211_NODE_MESH_ESTABLISHED: 957 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 958 break; 959 default: 960 break; 961 } 962 } 963 964 /* 965 * Helper function to generate a unique local ID required for mesh 966 * peer establishment. 967 */ 968 static void 969 mesh_checkid(void *arg, struct ieee80211_node *ni) 970 { 971 uint16_t *r = arg; 972 973 if (*r == ni->ni_mllid) 974 *(uint16_t *)arg = 0; 975 } 976 977 static uint32_t 978 mesh_generateid(struct ieee80211vap *vap) 979 { 980 int maxiter = 4; 981 uint16_t r; 982 983 do { 984 get_random_bytes(&r, 2); 985 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 986 maxiter--; 987 } while (r == 0 && maxiter > 0); 988 return r; 989 } 990 991 /* 992 * Verifies if we already received this packet by checking its 993 * sequence number. 994 * Returns 0 if the frame is to be accepted, 1 otherwise. 995 */ 996 static int 997 mesh_checkpseq(struct ieee80211vap *vap, 998 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 999 { 1000 struct ieee80211_mesh_route *rt; 1001 1002 rt = ieee80211_mesh_rt_find(vap, source); 1003 if (rt == NULL) { 1004 rt = ieee80211_mesh_rt_add(vap, source); 1005 if (rt == NULL) { 1006 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 1007 "%s", "add mcast route failed"); 1008 vap->iv_stats.is_mesh_rtaddfailed++; 1009 return 1; 1010 } 1011 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 1012 "add mcast route, mesh seqno %d", seq); 1013 rt->rt_lastmseq = seq; 1014 return 0; 1015 } 1016 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 1017 return 1; 1018 } else { 1019 rt->rt_lastmseq = seq; 1020 return 0; 1021 } 1022 } 1023 1024 /* 1025 * Iterate the routing table and locate the next hop. 1026 */ 1027 struct ieee80211_node * 1028 ieee80211_mesh_find_txnode(struct ieee80211vap *vap, 1029 const uint8_t dest[IEEE80211_ADDR_LEN]) 1030 { 1031 struct ieee80211_mesh_route *rt; 1032 1033 rt = ieee80211_mesh_rt_find(vap, dest); 1034 if (rt == NULL) 1035 return NULL; 1036 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1037 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1038 "%s: !valid, flags 0x%x", __func__, rt->rt_flags); 1039 /* XXX stat */ 1040 return NULL; 1041 } 1042 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1043 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate); 1044 if (rt == NULL) return NULL; 1045 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1046 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 1047 "%s: meshgate !valid, flags 0x%x", __func__, 1048 rt->rt_flags); 1049 /* XXX stat */ 1050 return NULL; 1051 } 1052 } 1053 return ieee80211_find_txnode(vap, rt->rt_nexthop); 1054 } 1055 1056 static void 1057 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m, 1058 struct ieee80211_mesh_route *rt_gate) 1059 { 1060 struct ifnet *ifp = vap->iv_ifp; 1061 struct ieee80211_node *ni; 1062 1063 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1064 1065 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest); 1066 if (ni == NULL) { 1067 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1068 m_freem(m); 1069 return; 1070 } 1071 1072 /* 1073 * Send through the VAP packet transmit path. 1074 * This consumes the node ref grabbed above and 1075 * the mbuf, regardless of whether there's a problem 1076 * or not. 1077 */ 1078 (void) ieee80211_vap_pkt_send_dest(vap, m, ni); 1079 } 1080 1081 /* 1082 * Forward the queued frames to known valid mesh gates. 1083 * Assume destination to be outside the MBSS (i.e. proxy entry), 1084 * If no valid mesh gates are known silently discard queued frames. 1085 * After transmitting frames to all known valid mesh gates, this route 1086 * will be marked invalid, and a new path discovery will happen in the hopes 1087 * that (at least) one of the mesh gates have a new proxy entry for us to use. 1088 */ 1089 void 1090 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap, 1091 struct ieee80211_mesh_route *rt_dest) 1092 { 1093 struct ieee80211com *ic = vap->iv_ic; 1094 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1095 struct ieee80211_mesh_route *rt_gate; 1096 struct ieee80211_mesh_gate_route *gr = NULL, *gr_next; 1097 struct mbuf *m, *mcopy, *next; 1098 1099 IEEE80211_TX_UNLOCK_ASSERT(ic); 1100 1101 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER, 1102 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER")); 1103 1104 /* XXX: send to more than one valid mash gate */ 1105 MESH_RT_LOCK(ms); 1106 1107 m = ieee80211_ageq_remove(&ic->ic_stageq, 1108 (struct ieee80211_node *)(uintptr_t) 1109 ieee80211_mac_hash(ic, rt_dest->rt_dest)); 1110 1111 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) { 1112 rt_gate = gr->gr_route; 1113 if (rt_gate == NULL) { 1114 #if defined(__DragonFly__) 1115 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1116 rt_dest->rt_dest, 1117 "mesh gate with no path %s", 1118 ether_sprintf(gr->gr_addr)); 1119 #else 1120 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1121 "mesh gate with no path %6D", 1122 gr->gr_addr, ":"); 1123 #endif 1124 continue; 1125 } 1126 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) 1127 continue; 1128 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE, 1129 ("route not marked as a mesh gate")); 1130 KASSERT((rt_gate->rt_flags & 1131 IEEE80211_MESHRT_FLAGS_PROXY) == 0, 1132 ("found mesh gate that is also marked porxy")); 1133 /* 1134 * convert route to a proxy route gated by the current 1135 * mesh gate, this is needed so encap can built data 1136 * frame with correct address. 1137 */ 1138 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1139 IEEE80211_MESHRT_FLAGS_VALID; 1140 rt_dest->rt_ext_seq = 1; /* random value */ 1141 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest); 1142 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop); 1143 rt_dest->rt_metric = rt_gate->rt_metric; 1144 rt_dest->rt_nhops = rt_gate->rt_nhops; 1145 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact); 1146 MESH_RT_UNLOCK(ms); 1147 /* XXX: lock?? */ 1148 mcopy = m_dup(m, M_NOWAIT); 1149 for (; mcopy != NULL; mcopy = next) { 1150 next = mcopy->m_nextpkt; 1151 mcopy->m_nextpkt = NULL; 1152 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, 1153 rt_dest->rt_dest, 1154 "flush queued frame %p len %d", mcopy, 1155 mcopy->m_pkthdr.len); 1156 mesh_transmit_to_gate(vap, mcopy, rt_gate); 1157 } 1158 MESH_RT_LOCK(ms); 1159 } 1160 rt_dest->rt_flags = 0; /* Mark invalid */ 1161 m_freem(m); 1162 MESH_RT_UNLOCK(ms); 1163 } 1164 1165 /* 1166 * Forward the specified frame. 1167 * Decrement the TTL and set TA to our MAC address. 1168 */ 1169 static void 1170 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 1171 const struct ieee80211_meshcntl *mc) 1172 { 1173 struct ieee80211com *ic = vap->iv_ic; 1174 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1175 struct ifnet *ifp = vap->iv_ifp; 1176 const struct ieee80211_frame *wh = 1177 mtod(m, const struct ieee80211_frame *); 1178 struct mbuf *mcopy; 1179 struct ieee80211_meshcntl *mccopy; 1180 struct ieee80211_frame *whcopy; 1181 struct ieee80211_node *ni; 1182 int err; 1183 1184 /* This is called from the RX path - don't hold this lock */ 1185 IEEE80211_TX_UNLOCK_ASSERT(ic); 1186 1187 /* 1188 * mesh ttl of 1 means we are the last one receiving it, 1189 * according to amendment we decrement and then check if 1190 * 0, if so we dont forward. 1191 */ 1192 if (mc->mc_ttl < 1) { 1193 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1194 "%s", "frame not fwd'd, ttl 1"); 1195 vap->iv_stats.is_mesh_fwd_ttl++; 1196 return; 1197 } 1198 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1199 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1200 "%s", "frame not fwd'd, fwding disabled"); 1201 vap->iv_stats.is_mesh_fwd_disabled++; 1202 return; 1203 } 1204 mcopy = m_dup(m, M_NOWAIT); 1205 if (mcopy == NULL) { 1206 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1207 "%s", "frame not fwd'd, cannot dup"); 1208 vap->iv_stats.is_mesh_fwd_nobuf++; 1209 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1210 return; 1211 } 1212 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 1213 sizeof(struct ieee80211_meshcntl)); 1214 if (mcopy == NULL) { 1215 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1216 "%s", "frame not fwd'd, too short"); 1217 vap->iv_stats.is_mesh_fwd_tooshort++; 1218 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1219 m_freem(mcopy); 1220 return; 1221 } 1222 whcopy = mtod(mcopy, struct ieee80211_frame *); 1223 mccopy = (struct ieee80211_meshcntl *) 1224 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 1225 /* XXX clear other bits? */ 1226 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 1227 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 1228 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1229 ni = ieee80211_ref_node(vap->iv_bss); 1230 mcopy->m_flags |= M_MCAST; 1231 } else { 1232 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3); 1233 if (ni == NULL) { 1234 /* 1235 * [Optional] any of the following three actions: 1236 * o silently discard 1237 * o trigger a path discovery 1238 * o inform TA that meshDA is unknown. 1239 */ 1240 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 1241 "%s", "frame not fwd'd, no path"); 1242 ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL, 1243 IEEE80211_REASON_MESH_PERR_NO_FI); 1244 vap->iv_stats.is_mesh_fwd_nopath++; 1245 m_freem(mcopy); 1246 return; 1247 } 1248 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 1249 } 1250 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 1251 mccopy->mc_ttl--; 1252 1253 /* XXX calculate priority so drivers can find the tx queue */ 1254 M_WME_SETAC(mcopy, WME_AC_BE); 1255 1256 /* XXX do we know m_nextpkt is NULL? */ 1257 mcopy->m_pkthdr.rcvif = (void *) ni; 1258 1259 /* 1260 * XXX this bypasses all of the VAP TX handling; it passes frames 1261 * directly to the parent interface. 1262 * 1263 * Because of this, there's no TX lock being held as there's no 1264 * encaps state being used. 1265 * 1266 * Doing a direct parent transmit may not be the correct thing 1267 * to do here; we'll have to re-think this soon. 1268 */ 1269 IEEE80211_TX_LOCK(ic); 1270 err = ieee80211_parent_xmitpkt(ic, mcopy); 1271 IEEE80211_TX_UNLOCK(ic); 1272 if (!err) 1273 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1274 } 1275 1276 static struct mbuf * 1277 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 1278 { 1279 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 1280 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1281 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 1282 sizeof(struct ieee80211_meshcntl_ae10)]; 1283 const struct ieee80211_qosframe_addr4 *wh; 1284 const struct ieee80211_meshcntl_ae10 *mc; 1285 struct ether_header *eh; 1286 struct llc *llc; 1287 int ae; 1288 1289 if (m->m_len < hdrlen + sizeof(*llc) && 1290 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 1291 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 1292 "discard data frame: %s", "m_pullup failed"); 1293 vap->iv_stats.is_rx_tooshort++; 1294 return NULL; 1295 } 1296 memcpy(b, mtod(m, caddr_t), hdrlen); 1297 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 1298 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 1299 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 1300 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 1301 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1302 1303 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 1304 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 1305 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 1306 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 1307 /* NB: preserve AppleTalk frames that have a native SNAP hdr */ 1308 !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) || 1309 llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 1310 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 1311 llc = NULL; 1312 } else { 1313 m_adj(m, hdrlen - sizeof(*eh)); 1314 } 1315 eh = mtod(m, struct ether_header *); 1316 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1317 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 1318 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 1319 if (ae == IEEE80211_MESH_AE_00) { 1320 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 1321 } else if (ae == IEEE80211_MESH_AE_01) { 1322 IEEE80211_ADDR_COPY(eh->ether_shost, 1323 MC01(mc)->mc_addr4); 1324 } else { 1325 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1326 (const struct ieee80211_frame *)wh, NULL, 1327 "bad AE %d", ae); 1328 vap->iv_stats.is_mesh_badae++; 1329 m_freem(m); 1330 return NULL; 1331 } 1332 } else { 1333 if (ae == IEEE80211_MESH_AE_00) { 1334 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 1335 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 1336 } else if (ae == IEEE80211_MESH_AE_10) { 1337 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5); 1338 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6); 1339 } else { 1340 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1341 (const struct ieee80211_frame *)wh, NULL, 1342 "bad AE %d", ae); 1343 vap->iv_stats.is_mesh_badae++; 1344 m_freem(m); 1345 return NULL; 1346 } 1347 } 1348 #ifndef __NO_STRICT_ALIGNMENT 1349 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 1350 m = ieee80211_realign(vap, m, sizeof(*eh)); 1351 if (m == NULL) 1352 return NULL; 1353 } 1354 #endif /* !__NO_STRICT_ALIGNMENT */ 1355 if (llc != NULL) { 1356 eh = mtod(m, struct ether_header *); 1357 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 1358 } 1359 return m; 1360 #undef WDIR 1361 #undef MC01 1362 } 1363 1364 /* 1365 * Return non-zero if the unicast mesh data frame should be processed 1366 * locally. Frames that are not proxy'd have our address, otherwise 1367 * we need to consult the routing table to look for a proxy entry. 1368 */ 1369 static __inline int 1370 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 1371 const struct ieee80211_meshcntl *mc) 1372 { 1373 int ae = mc->mc_flags & 3; 1374 1375 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 1376 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 1377 KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10, 1378 ("bad AE %d", ae)); 1379 if (ae == IEEE80211_MESH_AE_10) { /* ucast w/ proxy */ 1380 const struct ieee80211_meshcntl_ae10 *mc10 = 1381 (const struct ieee80211_meshcntl_ae10 *) mc; 1382 struct ieee80211_mesh_route *rt = 1383 ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1384 /* check for proxy route to ourself */ 1385 return (rt != NULL && 1386 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1387 } else /* ucast w/o proxy */ 1388 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1389 } 1390 1391 /* 1392 * Verifies transmitter, updates lifetime, precursor list and forwards data. 1393 * > 0 means we have forwarded data and no need to process locally 1394 * == 0 means we want to process locally (and we may have forwarded data 1395 * < 0 means there was an error and data should be discarded 1396 */ 1397 static int 1398 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m, 1399 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1400 { 1401 struct ieee80211_qosframe_addr4 *qwh; 1402 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1403 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa; 1404 1405 /* This is called from the RX path - don't hold this lock */ 1406 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1407 1408 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1409 1410 /* 1411 * TODO: 1412 * o verify addr2 is a legitimate transmitter 1413 * o lifetime of precursor of addr3 (addr2) is max(init, curr) 1414 * o lifetime of precursor of addr4 (nexthop) is max(init, curr) 1415 */ 1416 1417 /* set lifetime of addr3 (meshDA) to initial value */ 1418 rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3); 1419 if (rt_meshda == NULL) { 1420 #if defined(__DragonFly__) 1421 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1422 "no route to meshDA(%s)", ether_sprintf(qwh->i_addr3)); 1423 #else 1424 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2, 1425 "no route to meshDA(%6D)", qwh->i_addr3, ":"); 1426 #endif 1427 /* 1428 * [Optional] any of the following three actions: 1429 * o silently discard [X] 1430 * o trigger a path discovery [ ] 1431 * o inform TA that meshDA is unknown. [ ] 1432 */ 1433 /* XXX: stats */ 1434 return (-1); 1435 } 1436 1437 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs( 1438 ms->ms_ppath->mpp_inact)); 1439 1440 /* set lifetime of addr4 (meshSA) to initial value */ 1441 rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1442 KASSERT(rt_meshsa != NULL, ("no route")); 1443 ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs( 1444 ms->ms_ppath->mpp_inact)); 1445 1446 mesh_forward(vap, m, mc); 1447 return (1); /* dont process locally */ 1448 } 1449 1450 /* 1451 * Verifies transmitter, updates lifetime, precursor list and process data 1452 * locally, if data is proxy with AE = 10 it could mean data should go 1453 * on another mesh path or data should be forwarded to the DS. 1454 * 1455 * > 0 means we have forwarded data and no need to process locally 1456 * == 0 means we want to process locally (and we may have forwarded data 1457 * < 0 means there was an error and data should be discarded 1458 */ 1459 static int 1460 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m, 1461 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1462 { 1463 struct ieee80211_qosframe_addr4 *qwh; 1464 const struct ieee80211_meshcntl_ae10 *mc10; 1465 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1466 struct ieee80211_mesh_route *rt; 1467 int ae; 1468 1469 /* This is called from the RX path - don't hold this lock */ 1470 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1471 1472 qwh = (struct ieee80211_qosframe_addr4 *)wh; 1473 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc; 1474 1475 /* 1476 * TODO: 1477 * o verify addr2 is a legitimate transmitter 1478 * o lifetime of precursor entry is max(init, curr) 1479 */ 1480 1481 /* set lifetime of addr4 (meshSA) to initial value */ 1482 rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4); 1483 KASSERT(rt != NULL, ("no route")); 1484 ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact)); 1485 rt = NULL; 1486 1487 ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK; 1488 KASSERT(ae == IEEE80211_MESH_AE_00 || 1489 ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae)); 1490 if (ae == IEEE80211_MESH_AE_10) { 1491 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) { 1492 return (0); /* process locally */ 1493 } 1494 1495 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5); 1496 if (rt != NULL && 1497 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) && 1498 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) { 1499 /* 1500 * Forward on another mesh-path, according to 1501 * amendment as specified in 9.32.4.1 1502 */ 1503 IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5); 1504 mesh_forward(vap, m, 1505 (const struct ieee80211_meshcntl *)mc10); 1506 return (1); /* dont process locally */ 1507 } 1508 /* 1509 * All other cases: forward of MSDUs from the MBSS to DS indiv. 1510 * addressed according to 13.11.3.2. 1511 */ 1512 #if defined(__DragonFly__) 1513 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1514 "forward frame to DS, SA(%s) DA(%s)", 1515 ether_sprintf(mc10->mc_addr6), 1516 ether_sprintf(mc10->mc_addr5)); 1517 #else 1518 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2, 1519 "forward frame to DS, SA(%6D) DA(%6D)", 1520 mc10->mc_addr6, ":", mc10->mc_addr5, ":"); 1521 #endif 1522 } 1523 return (0); /* process locally */ 1524 } 1525 1526 /* 1527 * Try to forward the group addressed data on to other mesh STAs, and 1528 * also to the DS. 1529 * 1530 * > 0 means we have forwarded data and no need to process locally 1531 * == 0 means we want to process locally (and we may have forwarded data 1532 * < 0 means there was an error and data should be discarded 1533 */ 1534 static int 1535 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m, 1536 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc) 1537 { 1538 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1539 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1540 1541 /* This is called from the RX path - don't hold this lock */ 1542 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic); 1543 1544 mesh_forward(vap, m, mc); 1545 1546 if(mc->mc_ttl > 0) { 1547 if (mc->mc_flags & IEEE80211_MESH_AE_01) { 1548 /* 1549 * Forward of MSDUs from the MBSS to DS group addressed 1550 * (according to 13.11.3.2) 1551 * This happens by delivering the packet, and a bridge 1552 * will sent it on another port member. 1553 */ 1554 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1555 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 1556 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, 1557 MC01(mc)->mc_addr4, "%s", 1558 "forward from MBSS to the DS"); 1559 } 1560 } 1561 return (0); /* process locally */ 1562 #undef MC01 1563 } 1564 1565 static int 1566 mesh_input(struct ieee80211_node *ni, struct mbuf *m, 1567 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1568 { 1569 #define HAS_SEQ(type) ((type & 0x4) == 0) 1570 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc) 1571 #define MC10(mc) ((const struct ieee80211_meshcntl_ae10 *)mc) 1572 struct ieee80211vap *vap = ni->ni_vap; 1573 struct ieee80211com *ic = ni->ni_ic; 1574 struct ifnet *ifp = vap->iv_ifp; 1575 struct ieee80211_frame *wh; 1576 const struct ieee80211_meshcntl *mc; 1577 int hdrspace, meshdrlen, need_tap, error; 1578 uint8_t dir, type, subtype, ae; 1579 uint32_t seq; 1580 const uint8_t *addr; 1581 uint8_t qos[2]; 1582 1583 KASSERT(ni != NULL, ("null node")); 1584 ni->ni_inact = ni->ni_inact_reload; 1585 1586 need_tap = 1; /* mbuf need to be tapped. */ 1587 type = -1; /* undefined */ 1588 1589 /* This is called from the RX path - don't hold this lock */ 1590 IEEE80211_TX_UNLOCK_ASSERT(ic); 1591 1592 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1593 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1594 ni->ni_macaddr, NULL, 1595 "too short (1): len %u", m->m_pkthdr.len); 1596 vap->iv_stats.is_rx_tooshort++; 1597 goto out; 1598 } 1599 /* 1600 * Bit of a cheat here, we use a pointer for a 3-address 1601 * frame format but don't reference fields past outside 1602 * ieee80211_frame_min w/o first validating the data is 1603 * present. 1604 */ 1605 wh = mtod(m, struct ieee80211_frame *); 1606 1607 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1608 IEEE80211_FC0_VERSION_0) { 1609 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1610 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1611 vap->iv_stats.is_rx_badversion++; 1612 goto err; 1613 } 1614 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1615 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1616 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1617 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1618 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1619 ni->ni_noise = nf; 1620 if (HAS_SEQ(type)) { 1621 uint8_t tid = ieee80211_gettid(wh); 1622 1623 if (IEEE80211_QOS_HAS_SEQ(wh) && 1624 TID_TO_WME_AC(tid) >= WME_AC_VI) 1625 ic->ic_wme.wme_hipri_traffic++; 1626 if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1)) 1627 goto out; 1628 } 1629 } 1630 #ifdef IEEE80211_DEBUG 1631 /* 1632 * It's easier, but too expensive, to simulate different mesh 1633 * topologies by consulting the ACL policy very early, so do this 1634 * only under DEBUG. 1635 * 1636 * NB: this check is also done upon peering link initiation. 1637 */ 1638 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1639 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1640 wh, NULL, "%s", "disallowed by ACL"); 1641 vap->iv_stats.is_rx_acl++; 1642 goto out; 1643 } 1644 #endif 1645 switch (type) { 1646 case IEEE80211_FC0_TYPE_DATA: 1647 if (ni == vap->iv_bss) 1648 goto out; 1649 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1650 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1651 ni->ni_macaddr, NULL, 1652 "peer link not yet established (%d)", 1653 ni->ni_mlstate); 1654 vap->iv_stats.is_mesh_nolink++; 1655 goto out; 1656 } 1657 if (dir != IEEE80211_FC1_DIR_FROMDS && 1658 dir != IEEE80211_FC1_DIR_DSTODS) { 1659 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1660 wh, "data", "incorrect dir 0x%x", dir); 1661 vap->iv_stats.is_rx_wrongdir++; 1662 goto err; 1663 } 1664 1665 /* All Mesh data frames are QoS subtype */ 1666 if (!HAS_SEQ(type)) { 1667 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1668 wh, "data", "incorrect subtype 0x%x", subtype); 1669 vap->iv_stats.is_rx_badsubtype++; 1670 goto err; 1671 } 1672 1673 /* 1674 * Next up, any fragmentation. 1675 * XXX: we defrag before we even try to forward, 1676 * Mesh Control field is not present in sub-sequent 1677 * fragmented frames. This is in contrast to Draft 4.0. 1678 */ 1679 hdrspace = ieee80211_hdrspace(ic, wh); 1680 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1681 m = ieee80211_defrag(ni, m, hdrspace); 1682 if (m == NULL) { 1683 /* Fragment dropped or frame not complete yet */ 1684 goto out; 1685 } 1686 } 1687 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */ 1688 1689 /* 1690 * Now we have a complete Mesh Data frame. 1691 */ 1692 1693 /* 1694 * Only fromDStoDS data frames use 4 address qos frames 1695 * as specified in amendment. Otherwise addr4 is located 1696 * in the Mesh Control field and a 3 address qos frame 1697 * is used. 1698 */ 1699 if (IEEE80211_IS_DSTODS(wh)) 1700 *(uint16_t *)qos = *(uint16_t *) 1701 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos; 1702 else 1703 *(uint16_t *)qos = *(uint16_t *) 1704 ((struct ieee80211_qosframe *)wh)->i_qos; 1705 1706 /* 1707 * NB: The mesh STA sets the Mesh Control Present 1708 * subfield to 1 in the Mesh Data frame containing 1709 * an unfragmented MSDU, an A-MSDU, or the first 1710 * fragment of an MSDU. 1711 * After defrag it should always be present. 1712 */ 1713 if (!(qos[1] & IEEE80211_QOS_MC)) { 1714 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1715 ni->ni_macaddr, NULL, 1716 "%s", "Mesh control field not present"); 1717 vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */ 1718 goto err; 1719 } 1720 1721 /* pull up enough to get to the mesh control */ 1722 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1723 (m = m_pullup(m, hdrspace + 1724 sizeof(struct ieee80211_meshcntl))) == NULL) { 1725 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1726 ni->ni_macaddr, NULL, 1727 "data too short: expecting %u", hdrspace); 1728 vap->iv_stats.is_rx_tooshort++; 1729 goto out; /* XXX */ 1730 } 1731 /* 1732 * Now calculate the full extent of the headers. Note 1733 * mesh_decap will pull up anything we didn't get 1734 * above when it strips the 802.11 headers. 1735 */ 1736 mc = (const struct ieee80211_meshcntl *) 1737 (mtod(m, const uint8_t *) + hdrspace); 1738 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK; 1739 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1740 ae * IEEE80211_ADDR_LEN; 1741 hdrspace += meshdrlen; 1742 1743 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */ 1744 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) && 1745 (m->m_len < hdrspace) && 1746 ((m = m_pullup(m, hdrspace)) == NULL)) { 1747 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1748 ni->ni_macaddr, NULL, 1749 "data too short: expecting %u", hdrspace); 1750 vap->iv_stats.is_rx_tooshort++; 1751 goto out; /* XXX */ 1752 } 1753 /* XXX: are we sure there is no reallocating after m_pullup? */ 1754 1755 seq = le32dec(mc->mc_seq); 1756 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1757 addr = wh->i_addr3; 1758 else if (ae == IEEE80211_MESH_AE_01) 1759 addr = MC01(mc)->mc_addr4; 1760 else 1761 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1762 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1763 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1764 addr, "data", "%s", "not to me"); 1765 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1766 goto out; 1767 } 1768 if (mesh_checkpseq(vap, addr, seq) != 0) { 1769 vap->iv_stats.is_rx_dup++; 1770 goto out; 1771 } 1772 1773 /* This code "routes" the frame to the right control path */ 1774 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1775 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3)) 1776 error = 1777 mesh_recv_indiv_data_to_me(vap, m, wh, mc); 1778 else if (IEEE80211_IS_MULTICAST(wh->i_addr3)) 1779 error = mesh_recv_group_data(vap, m, wh, mc); 1780 else 1781 error = mesh_recv_indiv_data_to_fwrd(vap, m, 1782 wh, mc); 1783 } else 1784 error = mesh_recv_group_data(vap, m, wh, mc); 1785 if (error < 0) 1786 goto err; 1787 else if (error > 0) 1788 goto out; 1789 1790 if (ieee80211_radiotap_active_vap(vap)) 1791 ieee80211_radiotap_rx(vap, m); 1792 need_tap = 0; 1793 1794 /* 1795 * Finally, strip the 802.11 header. 1796 */ 1797 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1798 if (m == NULL) { 1799 /* XXX mask bit to check for both */ 1800 /* don't count Null data frames as errors */ 1801 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1802 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1803 goto out; 1804 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1805 ni->ni_macaddr, "data", "%s", "decap error"); 1806 vap->iv_stats.is_rx_decap++; 1807 IEEE80211_NODE_STAT(ni, rx_decap); 1808 goto err; 1809 } 1810 if (qos[0] & IEEE80211_QOS_AMSDU) { 1811 m = ieee80211_decap_amsdu(ni, m); 1812 if (m == NULL) 1813 return IEEE80211_FC0_TYPE_DATA; 1814 } 1815 ieee80211_deliver_data(vap, ni, m); 1816 return type; 1817 case IEEE80211_FC0_TYPE_MGT: 1818 vap->iv_stats.is_rx_mgmt++; 1819 IEEE80211_NODE_STAT(ni, rx_mgmt); 1820 if (dir != IEEE80211_FC1_DIR_NODS) { 1821 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1822 wh, "mgt", "incorrect dir 0x%x", dir); 1823 vap->iv_stats.is_rx_wrongdir++; 1824 goto err; 1825 } 1826 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1827 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1828 ni->ni_macaddr, "mgt", "too short: len %u", 1829 m->m_pkthdr.len); 1830 vap->iv_stats.is_rx_tooshort++; 1831 goto out; 1832 } 1833 #ifdef IEEE80211_DEBUG 1834 if ((ieee80211_msg_debug(vap) && 1835 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1836 ieee80211_msg_dumppkts(vap)) { 1837 if_printf(ifp, "received %s from %s rssi %d\n", 1838 ieee80211_mgt_subtype_name(subtype), 1839 ether_sprintf(wh->i_addr2), rssi); 1840 } 1841 #endif 1842 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1843 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1844 wh, NULL, "%s", "WEP set but not permitted"); 1845 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1846 goto out; 1847 } 1848 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 1849 goto out; 1850 case IEEE80211_FC0_TYPE_CTL: 1851 vap->iv_stats.is_rx_ctl++; 1852 IEEE80211_NODE_STAT(ni, rx_ctrl); 1853 goto out; 1854 default: 1855 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1856 wh, "bad", "frame type 0x%x", type); 1857 /* should not come here */ 1858 break; 1859 } 1860 err: 1861 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1862 out: 1863 if (m != NULL) { 1864 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1865 ieee80211_radiotap_rx(vap, m); 1866 m_freem(m); 1867 } 1868 return type; 1869 #undef HAS_SEQ 1870 #undef MC01 1871 #undef MC10 1872 } 1873 1874 static void 1875 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1876 const struct ieee80211_rx_stats *rxs, int rssi, int nf) 1877 { 1878 struct ieee80211vap *vap = ni->ni_vap; 1879 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1880 struct ieee80211com *ic = ni->ni_ic; 1881 struct ieee80211_channel *rxchan = ic->ic_curchan; 1882 struct ieee80211_frame *wh; 1883 struct ieee80211_mesh_route *rt; 1884 uint8_t *frm, *efrm; 1885 1886 wh = mtod(m0, struct ieee80211_frame *); 1887 frm = (uint8_t *)&wh[1]; 1888 efrm = mtod(m0, uint8_t *) + m0->m_len; 1889 switch (subtype) { 1890 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1891 case IEEE80211_FC0_SUBTYPE_BEACON: 1892 { 1893 struct ieee80211_scanparams scan; 1894 struct ieee80211_channel *c; 1895 /* 1896 * We process beacon/probe response 1897 * frames to discover neighbors. 1898 */ 1899 if (rxs != NULL) { 1900 c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1901 if (c != NULL) 1902 rxchan = c; 1903 } 1904 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) 1905 return; 1906 /* 1907 * Count frame now that we know it's to be processed. 1908 */ 1909 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1910 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1911 IEEE80211_NODE_STAT(ni, rx_beacons); 1912 } else 1913 IEEE80211_NODE_STAT(ni, rx_proberesp); 1914 /* 1915 * If scanning, just pass information to the scan module. 1916 */ 1917 if (ic->ic_flags & IEEE80211_F_SCAN) { 1918 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1919 /* 1920 * Actively scanning a channel marked passive; 1921 * send a probe request now that we know there 1922 * is 802.11 traffic present. 1923 * 1924 * XXX check if the beacon we recv'd gives 1925 * us what we need and suppress the probe req 1926 */ 1927 ieee80211_probe_curchan(vap, 1); 1928 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1929 } 1930 ieee80211_add_scan(vap, rxchan, &scan, wh, 1931 subtype, rssi, nf); 1932 return; 1933 } 1934 1935 /* The rest of this code assumes we are running */ 1936 if (vap->iv_state != IEEE80211_S_RUN) 1937 return; 1938 /* 1939 * Ignore non-mesh STAs. 1940 */ 1941 if ((scan.capinfo & 1942 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1943 scan.meshid == NULL || scan.meshconf == NULL) { 1944 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1945 wh, "beacon", "%s", "not a mesh sta"); 1946 vap->iv_stats.is_mesh_wrongmesh++; 1947 return; 1948 } 1949 /* 1950 * Ignore STAs for other mesh networks. 1951 */ 1952 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1953 mesh_verify_meshconf(vap, scan.meshconf)) { 1954 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1955 wh, "beacon", "%s", "not for our mesh"); 1956 vap->iv_stats.is_mesh_wrongmesh++; 1957 return; 1958 } 1959 /* 1960 * Peer only based on the current ACL policy. 1961 */ 1962 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) { 1963 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1964 wh, NULL, "%s", "disallowed by ACL"); 1965 vap->iv_stats.is_rx_acl++; 1966 return; 1967 } 1968 /* 1969 * Do neighbor discovery. 1970 */ 1971 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1972 /* 1973 * Create a new entry in the neighbor table. 1974 */ 1975 ni = ieee80211_add_neighbor(vap, wh, &scan); 1976 } 1977 /* 1978 * Automatically peer with discovered nodes if possible. 1979 */ 1980 if (ni != vap->iv_bss && 1981 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) { 1982 switch (ni->ni_mlstate) { 1983 case IEEE80211_NODE_MESH_IDLE: 1984 { 1985 uint16_t args[1]; 1986 1987 /* Wait for backoff callout to reset counter */ 1988 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 1989 return; 1990 1991 ni->ni_mlpid = mesh_generateid(vap); 1992 if (ni->ni_mlpid == 0) 1993 return; 1994 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1995 args[0] = ni->ni_mlpid; 1996 ieee80211_send_action(ni, 1997 IEEE80211_ACTION_CAT_SELF_PROT, 1998 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1999 ni->ni_mlrcnt = 0; 2000 mesh_peer_timeout_setup(ni); 2001 break; 2002 } 2003 case IEEE80211_NODE_MESH_ESTABLISHED: 2004 { 2005 /* 2006 * Valid beacon from a peer mesh STA 2007 * bump TA lifetime 2008 */ 2009 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2); 2010 if(rt != NULL) { 2011 ieee80211_mesh_rt_update(rt, 2012 ticks_to_msecs( 2013 ms->ms_ppath->mpp_inact)); 2014 } 2015 break; 2016 } 2017 default: 2018 break; /* ignore */ 2019 } 2020 } 2021 break; 2022 } 2023 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2024 { 2025 uint8_t *ssid, *meshid, *rates, *xrates; 2026 uint8_t *sfrm; 2027 2028 if (vap->iv_state != IEEE80211_S_RUN) { 2029 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2030 wh, NULL, "wrong state %s", 2031 ieee80211_state_name[vap->iv_state]); 2032 vap->iv_stats.is_rx_mgtdiscard++; 2033 return; 2034 } 2035 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 2036 /* frame must be directed */ 2037 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2038 wh, NULL, "%s", "not unicast"); 2039 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 2040 return; 2041 } 2042 /* 2043 * prreq frame format 2044 * [tlv] ssid 2045 * [tlv] supported rates 2046 * [tlv] extended supported rates 2047 * [tlv] mesh id 2048 */ 2049 ssid = meshid = rates = xrates = NULL; 2050 sfrm = frm; 2051 while (efrm - frm > 1) { 2052 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 2053 switch (*frm) { 2054 case IEEE80211_ELEMID_SSID: 2055 ssid = frm; 2056 break; 2057 case IEEE80211_ELEMID_RATES: 2058 rates = frm; 2059 break; 2060 case IEEE80211_ELEMID_XRATES: 2061 xrates = frm; 2062 break; 2063 case IEEE80211_ELEMID_MESHID: 2064 meshid = frm; 2065 break; 2066 } 2067 frm += frm[1] + 2; 2068 } 2069 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 2070 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 2071 if (xrates != NULL) 2072 IEEE80211_VERIFY_ELEMENT(xrates, 2073 IEEE80211_RATE_MAXSIZE - rates[1], return); 2074 if (meshid != NULL) { 2075 IEEE80211_VERIFY_ELEMENT(meshid, 2076 IEEE80211_MESHID_LEN, return); 2077 /* NB: meshid, not ssid */ 2078 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 2079 } 2080 2081 /* XXX find a better class or define it's own */ 2082 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 2083 "%s", "recv probe req"); 2084 /* 2085 * Some legacy 11b clients cannot hack a complete 2086 * probe response frame. When the request includes 2087 * only a bare-bones rate set, communicate this to 2088 * the transmit side. 2089 */ 2090 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 2091 break; 2092 } 2093 2094 case IEEE80211_FC0_SUBTYPE_ACTION: 2095 case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 2096 if (ni == vap->iv_bss) { 2097 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2098 wh, NULL, "%s", "unknown node"); 2099 vap->iv_stats.is_rx_mgtdiscard++; 2100 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 2101 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 2102 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2103 wh, NULL, "%s", "not for us"); 2104 vap->iv_stats.is_rx_mgtdiscard++; 2105 } else if (vap->iv_state != IEEE80211_S_RUN) { 2106 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2107 wh, NULL, "wrong state %s", 2108 ieee80211_state_name[vap->iv_state]); 2109 vap->iv_stats.is_rx_mgtdiscard++; 2110 } else { 2111 if (ieee80211_parse_action(ni, m0) == 0) 2112 (void)ic->ic_recv_action(ni, wh, frm, efrm); 2113 } 2114 break; 2115 2116 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 2117 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 2118 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 2119 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 2120 case IEEE80211_FC0_SUBTYPE_TIMING_ADV: 2121 case IEEE80211_FC0_SUBTYPE_ATIM: 2122 case IEEE80211_FC0_SUBTYPE_DISASSOC: 2123 case IEEE80211_FC0_SUBTYPE_AUTH: 2124 case IEEE80211_FC0_SUBTYPE_DEAUTH: 2125 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 2126 wh, NULL, "%s", "not handled"); 2127 vap->iv_stats.is_rx_mgtdiscard++; 2128 break; 2129 2130 default: 2131 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 2132 wh, "mgt", "subtype 0x%x not handled", subtype); 2133 vap->iv_stats.is_rx_badsubtype++; 2134 break; 2135 } 2136 } 2137 2138 static void 2139 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 2140 { 2141 2142 switch (subtype) { 2143 case IEEE80211_FC0_SUBTYPE_BAR: 2144 ieee80211_recv_bar(ni, m); 2145 break; 2146 } 2147 } 2148 2149 /* 2150 * Parse meshpeering action ie's for MPM frames 2151 */ 2152 static const struct ieee80211_meshpeer_ie * 2153 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 2154 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2155 const uint8_t *frm, const uint8_t *efrm, 2156 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 2157 { 2158 struct ieee80211vap *vap = ni->ni_vap; 2159 const struct ieee80211_meshpeer_ie *mpie; 2160 uint16_t args[3]; 2161 const uint8_t *meshid, *meshconf, *meshpeer; 2162 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */ 2163 2164 meshid = meshconf = meshpeer = NULL; 2165 while (efrm - frm > 1) { 2166 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 2167 switch (*frm) { 2168 case IEEE80211_ELEMID_MESHID: 2169 meshid = frm; 2170 break; 2171 case IEEE80211_ELEMID_MESHCONF: 2172 meshconf = frm; 2173 break; 2174 case IEEE80211_ELEMID_MESHPEER: 2175 meshpeer = frm; 2176 mpie = (const struct ieee80211_meshpeer_ie *) frm; 2177 memset(mp, 0, sizeof(*mp)); 2178 mp->peer_len = mpie->peer_len; 2179 mp->peer_proto = le16dec(&mpie->peer_proto); 2180 mp->peer_llinkid = le16dec(&mpie->peer_llinkid); 2181 switch (subtype) { 2182 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2183 mp->peer_linkid = 2184 le16dec(&mpie->peer_linkid); 2185 break; 2186 case IEEE80211_ACTION_MESHPEERING_CLOSE: 2187 /* NB: peer link ID is optional */ 2188 if (mpie->peer_len == 2189 (IEEE80211_MPM_BASE_SZ + 2)) { 2190 mp->peer_linkid = 0; 2191 mp->peer_rcode = 2192 le16dec(&mpie->peer_linkid); 2193 } else { 2194 mp->peer_linkid = 2195 le16dec(&mpie->peer_linkid); 2196 mp->peer_rcode = 2197 le16dec(&mpie->peer_rcode); 2198 } 2199 break; 2200 } 2201 break; 2202 } 2203 frm += frm[1] + 2; 2204 } 2205 2206 /* 2207 * Verify the contents of the frame. 2208 * If it fails validation, close the peer link. 2209 */ 2210 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) { 2211 sendclose = 1; 2212 IEEE80211_DISCARD(vap, 2213 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2214 wh, NULL, "%s", "MPM validation failed"); 2215 } 2216 2217 /* If meshid is not the same reject any frames type. */ 2218 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) { 2219 sendclose = 1; 2220 IEEE80211_DISCARD(vap, 2221 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2222 wh, NULL, "%s", "not for our mesh"); 2223 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) { 2224 /* 2225 * Standard not clear about this, if we dont ignore 2226 * there will be an endless loop between nodes sending 2227 * CLOSE frames between each other with wrong meshid. 2228 * Discard and timers will bring FSM to IDLE state. 2229 */ 2230 return NULL; 2231 } 2232 } 2233 2234 /* 2235 * Close frames are accepted if meshid is the same. 2236 * Verify the other two types. 2237 */ 2238 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE && 2239 mesh_verify_meshconf(vap, meshconf)) { 2240 sendclose = 1; 2241 IEEE80211_DISCARD(vap, 2242 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2243 wh, NULL, "%s", "configuration missmatch"); 2244 } 2245 2246 if (sendclose) { 2247 vap->iv_stats.is_rx_mgtdiscard++; 2248 switch (ni->ni_mlstate) { 2249 case IEEE80211_NODE_MESH_IDLE: 2250 case IEEE80211_NODE_MESH_ESTABLISHED: 2251 case IEEE80211_NODE_MESH_HOLDING: 2252 /* ignore */ 2253 break; 2254 case IEEE80211_NODE_MESH_OPENSNT: 2255 case IEEE80211_NODE_MESH_OPENRCV: 2256 case IEEE80211_NODE_MESH_CONFIRMRCV: 2257 args[0] = ni->ni_mlpid; 2258 args[1] = ni->ni_mllid; 2259 /* Reason codes for rejection */ 2260 switch (subtype) { 2261 case IEEE80211_ACTION_MESHPEERING_OPEN: 2262 args[2] = IEEE80211_REASON_MESH_CPVIOLATION; 2263 break; 2264 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 2265 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS; 2266 break; 2267 } 2268 ieee80211_send_action(ni, 2269 IEEE80211_ACTION_CAT_SELF_PROT, 2270 IEEE80211_ACTION_MESHPEERING_CLOSE, 2271 args); 2272 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2273 mesh_peer_timeout_setup(ni); 2274 break; 2275 } 2276 return NULL; 2277 } 2278 2279 return (const struct ieee80211_meshpeer_ie *) mp; 2280 } 2281 2282 static int 2283 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 2284 const struct ieee80211_frame *wh, 2285 const uint8_t *frm, const uint8_t *efrm) 2286 { 2287 struct ieee80211vap *vap = ni->ni_vap; 2288 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2289 struct ieee80211_meshpeer_ie ie; 2290 const struct ieee80211_meshpeer_ie *meshpeer; 2291 uint16_t args[3]; 2292 2293 /* +2+2 for action + code + capabilites */ 2294 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 2295 IEEE80211_ACTION_MESHPEERING_OPEN); 2296 if (meshpeer == NULL) { 2297 return 0; 2298 } 2299 2300 /* XXX move up */ 2301 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2302 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 2303 2304 switch (ni->ni_mlstate) { 2305 case IEEE80211_NODE_MESH_IDLE: 2306 /* Reject open request if reached our maximum neighbor count */ 2307 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) { 2308 args[0] = meshpeer->peer_llinkid; 2309 args[1] = 0; 2310 args[2] = IEEE80211_REASON_MESH_MAX_PEERS; 2311 ieee80211_send_action(ni, 2312 IEEE80211_ACTION_CAT_SELF_PROT, 2313 IEEE80211_ACTION_MESHPEERING_CLOSE, 2314 args); 2315 /* stay in IDLE state */ 2316 return (0); 2317 } 2318 /* Open frame accepted */ 2319 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2320 ni->ni_mllid = meshpeer->peer_llinkid; 2321 ni->ni_mlpid = mesh_generateid(vap); 2322 if (ni->ni_mlpid == 0) 2323 return 0; /* XXX */ 2324 args[0] = ni->ni_mlpid; 2325 /* Announce we're open too... */ 2326 ieee80211_send_action(ni, 2327 IEEE80211_ACTION_CAT_SELF_PROT, 2328 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2329 /* ...and confirm the link. */ 2330 args[0] = ni->ni_mlpid; 2331 args[1] = ni->ni_mllid; 2332 ieee80211_send_action(ni, 2333 IEEE80211_ACTION_CAT_SELF_PROT, 2334 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2335 args); 2336 mesh_peer_timeout_setup(ni); 2337 break; 2338 case IEEE80211_NODE_MESH_OPENRCV: 2339 /* Wrong Link ID */ 2340 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2341 args[0] = ni->ni_mllid; 2342 args[1] = ni->ni_mlpid; 2343 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2344 ieee80211_send_action(ni, 2345 IEEE80211_ACTION_CAT_SELF_PROT, 2346 IEEE80211_ACTION_MESHPEERING_CLOSE, 2347 args); 2348 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2349 mesh_peer_timeout_setup(ni); 2350 break; 2351 } 2352 /* Duplicate open, confirm again. */ 2353 args[0] = ni->ni_mlpid; 2354 args[1] = ni->ni_mllid; 2355 ieee80211_send_action(ni, 2356 IEEE80211_ACTION_CAT_SELF_PROT, 2357 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2358 args); 2359 break; 2360 case IEEE80211_NODE_MESH_OPENSNT: 2361 ni->ni_mllid = meshpeer->peer_llinkid; 2362 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 2363 args[0] = ni->ni_mlpid; 2364 args[1] = ni->ni_mllid; 2365 ieee80211_send_action(ni, 2366 IEEE80211_ACTION_CAT_SELF_PROT, 2367 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2368 args); 2369 /* NB: don't setup/clear any timeout */ 2370 break; 2371 case IEEE80211_NODE_MESH_CONFIRMRCV: 2372 if (ni->ni_mlpid != meshpeer->peer_linkid || 2373 ni->ni_mllid != meshpeer->peer_llinkid) { 2374 args[0] = ni->ni_mlpid; 2375 args[1] = ni->ni_mllid; 2376 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2377 ieee80211_send_action(ni, 2378 IEEE80211_ACTION_CAT_SELF_PROT, 2379 IEEE80211_ACTION_MESHPEERING_CLOSE, 2380 args); 2381 mesh_linkchange(ni, 2382 IEEE80211_NODE_MESH_HOLDING); 2383 mesh_peer_timeout_setup(ni); 2384 break; 2385 } 2386 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2387 ni->ni_mllid = meshpeer->peer_llinkid; 2388 args[0] = ni->ni_mlpid; 2389 args[1] = ni->ni_mllid; 2390 ieee80211_send_action(ni, 2391 IEEE80211_ACTION_CAT_SELF_PROT, 2392 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2393 args); 2394 mesh_peer_timeout_stop(ni); 2395 break; 2396 case IEEE80211_NODE_MESH_ESTABLISHED: 2397 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2398 args[0] = ni->ni_mllid; 2399 args[1] = ni->ni_mlpid; 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 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2406 mesh_peer_timeout_setup(ni); 2407 break; 2408 } 2409 args[0] = ni->ni_mlpid; 2410 args[1] = ni->ni_mllid; 2411 ieee80211_send_action(ni, 2412 IEEE80211_ACTION_CAT_SELF_PROT, 2413 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2414 args); 2415 break; 2416 case IEEE80211_NODE_MESH_HOLDING: 2417 args[0] = ni->ni_mlpid; 2418 args[1] = meshpeer->peer_llinkid; 2419 /* Standard not clear about what the reaason code should be */ 2420 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2421 ieee80211_send_action(ni, 2422 IEEE80211_ACTION_CAT_SELF_PROT, 2423 IEEE80211_ACTION_MESHPEERING_CLOSE, 2424 args); 2425 break; 2426 } 2427 return 0; 2428 } 2429 2430 static int 2431 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 2432 const struct ieee80211_frame *wh, 2433 const uint8_t *frm, const uint8_t *efrm) 2434 { 2435 struct ieee80211vap *vap = ni->ni_vap; 2436 struct ieee80211_meshpeer_ie ie; 2437 const struct ieee80211_meshpeer_ie *meshpeer; 2438 uint16_t args[3]; 2439 2440 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 2441 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 2442 IEEE80211_ACTION_MESHPEERING_CONFIRM); 2443 if (meshpeer == NULL) { 2444 return 0; 2445 } 2446 2447 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2448 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 2449 meshpeer->peer_llinkid, meshpeer->peer_linkid); 2450 2451 switch (ni->ni_mlstate) { 2452 case IEEE80211_NODE_MESH_OPENRCV: 2453 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 2454 mesh_peer_timeout_stop(ni); 2455 break; 2456 case IEEE80211_NODE_MESH_OPENSNT: 2457 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 2458 mesh_peer_timeout_setup(ni); 2459 break; 2460 case IEEE80211_NODE_MESH_HOLDING: 2461 args[0] = ni->ni_mlpid; 2462 args[1] = meshpeer->peer_llinkid; 2463 /* Standard not clear about what the reaason code should be */ 2464 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2465 ieee80211_send_action(ni, 2466 IEEE80211_ACTION_CAT_SELF_PROT, 2467 IEEE80211_ACTION_MESHPEERING_CLOSE, 2468 args); 2469 break; 2470 case IEEE80211_NODE_MESH_CONFIRMRCV: 2471 if (ni->ni_mllid != meshpeer->peer_llinkid) { 2472 args[0] = ni->ni_mlpid; 2473 args[1] = ni->ni_mllid; 2474 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 2475 ieee80211_send_action(ni, 2476 IEEE80211_ACTION_CAT_SELF_PROT, 2477 IEEE80211_ACTION_MESHPEERING_CLOSE, 2478 args); 2479 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2480 mesh_peer_timeout_setup(ni); 2481 } 2482 break; 2483 default: 2484 IEEE80211_DISCARD(vap, 2485 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2486 wh, NULL, "received confirm in invalid state %d", 2487 ni->ni_mlstate); 2488 vap->iv_stats.is_rx_mgtdiscard++; 2489 break; 2490 } 2491 return 0; 2492 } 2493 2494 static int 2495 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 2496 const struct ieee80211_frame *wh, 2497 const uint8_t *frm, const uint8_t *efrm) 2498 { 2499 struct ieee80211_meshpeer_ie ie; 2500 const struct ieee80211_meshpeer_ie *meshpeer; 2501 uint16_t args[3]; 2502 2503 /* +2 for action + code */ 2504 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie, 2505 IEEE80211_ACTION_MESHPEERING_CLOSE); 2506 if (meshpeer == NULL) { 2507 return 0; 2508 } 2509 2510 /* 2511 * XXX: check reason code, for example we could receive 2512 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt 2513 * to peer again. 2514 */ 2515 2516 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2517 ni, "%s", "recv PEER CLOSE"); 2518 2519 switch (ni->ni_mlstate) { 2520 case IEEE80211_NODE_MESH_IDLE: 2521 /* ignore */ 2522 break; 2523 case IEEE80211_NODE_MESH_OPENRCV: 2524 case IEEE80211_NODE_MESH_OPENSNT: 2525 case IEEE80211_NODE_MESH_CONFIRMRCV: 2526 case IEEE80211_NODE_MESH_ESTABLISHED: 2527 args[0] = ni->ni_mlpid; 2528 args[1] = ni->ni_mllid; 2529 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 2530 ieee80211_send_action(ni, 2531 IEEE80211_ACTION_CAT_SELF_PROT, 2532 IEEE80211_ACTION_MESHPEERING_CLOSE, 2533 args); 2534 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2535 mesh_peer_timeout_setup(ni); 2536 break; 2537 case IEEE80211_NODE_MESH_HOLDING: 2538 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2539 mesh_peer_timeout_stop(ni); 2540 break; 2541 } 2542 return 0; 2543 } 2544 2545 /* 2546 * Link Metric handling. 2547 */ 2548 static int 2549 mesh_recv_action_meshlmetric(struct ieee80211_node *ni, 2550 const struct ieee80211_frame *wh, 2551 const uint8_t *frm, const uint8_t *efrm) 2552 { 2553 const struct ieee80211_meshlmetric_ie *ie = 2554 (const struct ieee80211_meshlmetric_ie *) 2555 (frm+2); /* action + code */ 2556 struct ieee80211_meshlmetric_ie lm_rep; 2557 2558 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2559 lm_rep.lm_flags = 0; 2560 lm_rep.lm_metric = mesh_airtime_calc(ni); 2561 ieee80211_send_action(ni, 2562 IEEE80211_ACTION_CAT_MESH, 2563 IEEE80211_ACTION_MESH_LMETRIC, 2564 &lm_rep); 2565 } 2566 /* XXX: else do nothing for now */ 2567 return 0; 2568 } 2569 2570 /* 2571 * Parse meshgate action ie's for GANN frames. 2572 * Returns -1 if parsing fails, otherwise 0. 2573 */ 2574 static int 2575 mesh_parse_meshgate_action(struct ieee80211_node *ni, 2576 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 2577 struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm) 2578 { 2579 struct ieee80211vap *vap = ni->ni_vap; 2580 const struct ieee80211_meshgann_ie *gannie; 2581 2582 while (efrm - frm > 1) { 2583 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1); 2584 switch (*frm) { 2585 case IEEE80211_ELEMID_MESHGANN: 2586 gannie = (const struct ieee80211_meshgann_ie *) frm; 2587 memset(ie, 0, sizeof(*ie)); 2588 ie->gann_ie = gannie->gann_ie; 2589 ie->gann_len = gannie->gann_len; 2590 ie->gann_flags = gannie->gann_flags; 2591 ie->gann_hopcount = gannie->gann_hopcount; 2592 ie->gann_ttl = gannie->gann_ttl; 2593 IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr); 2594 ie->gann_seq = le32dec(&gannie->gann_seq); 2595 ie->gann_interval = le16dec(&gannie->gann_interval); 2596 break; 2597 } 2598 frm += frm[1] + 2; 2599 } 2600 2601 return 0; 2602 } 2603 2604 /* 2605 * Mesh Gate Announcement handling. 2606 */ 2607 static int 2608 mesh_recv_action_meshgate(struct ieee80211_node *ni, 2609 const struct ieee80211_frame *wh, 2610 const uint8_t *frm, const uint8_t *efrm) 2611 { 2612 struct ieee80211vap *vap = ni->ni_vap; 2613 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2614 struct ieee80211_mesh_gate_route *gr, *next; 2615 struct ieee80211_mesh_route *rt_gate; 2616 struct ieee80211_meshgann_ie pgann; 2617 struct ieee80211_meshgann_ie ie; 2618 int found = 0; 2619 2620 /* +2 for action + code */ 2621 if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) { 2622 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2623 ni->ni_macaddr, NULL, "%s", 2624 "GANN parsing failed"); 2625 vap->iv_stats.is_rx_mgtdiscard++; 2626 return (0); 2627 } 2628 2629 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr)) 2630 return 0; 2631 2632 #if defined(__DragonFly__) 2633 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2634 "received GANN, meshgate: %s (seq %u)", 2635 ether_sprintf(ie.gann_addr), 2636 ie.gann_seq); 2637 #else 2638 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr, 2639 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":", 2640 ie.gann_seq); 2641 #endif 2642 2643 if (ms == NULL) 2644 return (0); 2645 MESH_RT_LOCK(ms); 2646 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) { 2647 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr)) 2648 continue; 2649 if (ie.gann_seq <= gr->gr_lastseq) { 2650 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 2651 ni->ni_macaddr, NULL, 2652 "GANN old seqno %u <= %u", 2653 ie.gann_seq, gr->gr_lastseq); 2654 MESH_RT_UNLOCK(ms); 2655 return (0); 2656 } 2657 /* corresponding mesh gate found & GANN accepted */ 2658 found = 1; 2659 break; 2660 2661 } 2662 if (found == 0) { 2663 /* this GANN is from a new mesh Gate add it to known table. */ 2664 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2665 "stored new GANN information, seq %u.", ie.gann_seq); 2666 #if defined(__DragonFly__) 2667 gr = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2668 M_80211_MESH_GT_RT, M_INTWAIT | M_ZERO); 2669 #else 2670 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)), 2671 M_80211_MESH_GT_RT, 2672 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 2673 #endif 2674 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr); 2675 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next); 2676 } 2677 gr->gr_lastseq = ie.gann_seq; 2678 2679 /* check if we have a path to this gate */ 2680 rt_gate = mesh_rt_find_locked(ms, gr->gr_addr); 2681 if (rt_gate != NULL && 2682 rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 2683 gr->gr_route = rt_gate; 2684 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 2685 } 2686 2687 MESH_RT_UNLOCK(ms); 2688 2689 /* popagate only if decremented ttl >= 1 && forwarding is enabled */ 2690 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) 2691 return 0; 2692 pgann.gann_flags = ie.gann_flags; /* Reserved */ 2693 pgann.gann_hopcount = ie.gann_hopcount + 1; 2694 pgann.gann_ttl = ie.gann_ttl - 1; 2695 IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr); 2696 pgann.gann_seq = ie.gann_seq; 2697 pgann.gann_interval = ie.gann_interval; 2698 2699 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr, 2700 "%s", "propagate GANN"); 2701 2702 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH, 2703 IEEE80211_ACTION_MESH_GANN, &pgann); 2704 2705 return 0; 2706 } 2707 2708 static int 2709 mesh_send_action(struct ieee80211_node *ni, 2710 const uint8_t sa[IEEE80211_ADDR_LEN], 2711 const uint8_t da[IEEE80211_ADDR_LEN], 2712 struct mbuf *m) 2713 { 2714 struct ieee80211vap *vap = ni->ni_vap; 2715 struct ieee80211com *ic = ni->ni_ic; 2716 struct ieee80211_bpf_params params; 2717 struct ieee80211_frame *wh; 2718 int ret; 2719 2720 KASSERT(ni != NULL, ("null node")); 2721 2722 if (vap->iv_state == IEEE80211_S_CAC) { 2723 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 2724 "block %s frame in CAC state", "Mesh action"); 2725 vap->iv_stats.is_tx_badstate++; 2726 ieee80211_free_node(ni); 2727 m_freem(m); 2728 return EIO; /* XXX */ 2729 } 2730 2731 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 2732 if (m == NULL) { 2733 ieee80211_free_node(ni); 2734 return ENOMEM; 2735 } 2736 2737 IEEE80211_TX_LOCK(ic); 2738 wh = mtod(m, struct ieee80211_frame *); 2739 ieee80211_send_setup(ni, m, 2740 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 2741 IEEE80211_NONQOS_TID, sa, da, sa); 2742 m->m_flags |= M_ENCAP; /* mark encapsulated */ 2743 2744 memset(¶ms, 0, sizeof(params)); 2745 params.ibp_pri = WME_AC_VO; 2746 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2747 if (IEEE80211_IS_MULTICAST(da)) 2748 params.ibp_try0 = 1; 2749 else 2750 params.ibp_try0 = ni->ni_txparms->maxretry; 2751 params.ibp_power = ni->ni_txpower; 2752 2753 IEEE80211_NODE_STAT(ni, tx_mgmt); 2754 2755 ret = ieee80211_raw_output(vap, ni, m, ¶ms); 2756 IEEE80211_TX_UNLOCK(ic); 2757 return (ret); 2758 } 2759 2760 #define ADDSHORT(frm, v) do { \ 2761 frm[0] = (v) & 0xff; \ 2762 frm[1] = (v) >> 8; \ 2763 frm += 2; \ 2764 } while (0) 2765 #define ADDWORD(frm, v) do { \ 2766 frm[0] = (v) & 0xff; \ 2767 frm[1] = ((v) >> 8) & 0xff; \ 2768 frm[2] = ((v) >> 16) & 0xff; \ 2769 frm[3] = ((v) >> 24) & 0xff; \ 2770 frm += 4; \ 2771 } while (0) 2772 2773 static int 2774 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 2775 int category, int action, void *args0) 2776 { 2777 struct ieee80211vap *vap = ni->ni_vap; 2778 struct ieee80211com *ic = ni->ni_ic; 2779 uint16_t *args = args0; 2780 const struct ieee80211_rateset *rs; 2781 struct mbuf *m; 2782 uint8_t *frm; 2783 2784 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2785 "send PEER OPEN action: localid 0x%x", args[0]); 2786 2787 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2788 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2789 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2790 ieee80211_ref_node(ni); 2791 2792 m = ieee80211_getmgtframe(&frm, 2793 ic->ic_headroom + sizeof(struct ieee80211_frame), 2794 sizeof(uint16_t) /* action+category */ 2795 + sizeof(uint16_t) /* capabilites */ 2796 + 2 + IEEE80211_RATE_SIZE 2797 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2798 + 2 + IEEE80211_MESHID_LEN 2799 + sizeof(struct ieee80211_meshconf_ie) 2800 + sizeof(struct ieee80211_meshpeer_ie) 2801 ); 2802 if (m != NULL) { 2803 /* 2804 * mesh peer open action frame format: 2805 * [1] category 2806 * [1] action 2807 * [2] capabilities 2808 * [tlv] rates 2809 * [tlv] xrates 2810 * [tlv] mesh id 2811 * [tlv] mesh conf 2812 * [tlv] mesh peer link mgmt 2813 */ 2814 *frm++ = category; 2815 *frm++ = action; 2816 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2817 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2818 frm = ieee80211_add_rates(frm, rs); 2819 frm = ieee80211_add_xrates(frm, rs); 2820 frm = ieee80211_add_meshid(frm, vap); 2821 frm = ieee80211_add_meshconf(frm, vap); 2822 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN, 2823 args[0], 0, 0); 2824 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2825 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2826 } else { 2827 vap->iv_stats.is_tx_nobuf++; 2828 ieee80211_free_node(ni); 2829 return ENOMEM; 2830 } 2831 } 2832 2833 static int 2834 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 2835 int category, int action, void *args0) 2836 { 2837 struct ieee80211vap *vap = ni->ni_vap; 2838 struct ieee80211com *ic = ni->ni_ic; 2839 uint16_t *args = args0; 2840 const struct ieee80211_rateset *rs; 2841 struct mbuf *m; 2842 uint8_t *frm; 2843 2844 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2845 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 2846 args[0], args[1]); 2847 2848 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2849 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2850 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2851 ieee80211_ref_node(ni); 2852 2853 m = ieee80211_getmgtframe(&frm, 2854 ic->ic_headroom + sizeof(struct ieee80211_frame), 2855 sizeof(uint16_t) /* action+category */ 2856 + sizeof(uint16_t) /* capabilites */ 2857 + sizeof(uint16_t) /* status code */ 2858 + sizeof(uint16_t) /* AID */ 2859 + 2 + IEEE80211_RATE_SIZE 2860 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 2861 + 2 + IEEE80211_MESHID_LEN 2862 + sizeof(struct ieee80211_meshconf_ie) 2863 + sizeof(struct ieee80211_meshpeer_ie) 2864 ); 2865 if (m != NULL) { 2866 /* 2867 * mesh peer confirm action frame format: 2868 * [1] category 2869 * [1] action 2870 * [2] capabilities 2871 * [2] status code 2872 * [2] association id (peer ID) 2873 * [tlv] rates 2874 * [tlv] xrates 2875 * [tlv] mesh id 2876 * [tlv] mesh conf 2877 * [tlv] mesh peer link mgmt 2878 */ 2879 *frm++ = category; 2880 *frm++ = action; 2881 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 2882 ADDSHORT(frm, 0); /* status code */ 2883 ADDSHORT(frm, args[1]); /* AID */ 2884 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 2885 frm = ieee80211_add_rates(frm, rs); 2886 frm = ieee80211_add_xrates(frm, rs); 2887 frm = ieee80211_add_meshid(frm, vap); 2888 frm = ieee80211_add_meshconf(frm, vap); 2889 frm = ieee80211_add_meshpeer(frm, 2890 IEEE80211_ACTION_MESHPEERING_CONFIRM, 2891 args[0], args[1], 0); 2892 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2893 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2894 } else { 2895 vap->iv_stats.is_tx_nobuf++; 2896 ieee80211_free_node(ni); 2897 return ENOMEM; 2898 } 2899 } 2900 2901 static int 2902 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2903 int category, int action, void *args0) 2904 { 2905 struct ieee80211vap *vap = ni->ni_vap; 2906 struct ieee80211com *ic = ni->ni_ic; 2907 uint16_t *args = args0; 2908 struct mbuf *m; 2909 uint8_t *frm; 2910 2911 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2912 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)", 2913 args[0], args[1], args[2], ieee80211_reason_to_string(args[2])); 2914 2915 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2916 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2917 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2918 ieee80211_ref_node(ni); 2919 2920 m = ieee80211_getmgtframe(&frm, 2921 ic->ic_headroom + sizeof(struct ieee80211_frame), 2922 sizeof(uint16_t) /* action+category */ 2923 + sizeof(uint16_t) /* reason code */ 2924 + 2 + IEEE80211_MESHID_LEN 2925 + sizeof(struct ieee80211_meshpeer_ie) 2926 ); 2927 if (m != NULL) { 2928 /* 2929 * mesh peer close action frame format: 2930 * [1] category 2931 * [1] action 2932 * [tlv] mesh id 2933 * [tlv] mesh peer link mgmt 2934 */ 2935 *frm++ = category; 2936 *frm++ = action; 2937 frm = ieee80211_add_meshid(frm, vap); 2938 frm = ieee80211_add_meshpeer(frm, 2939 IEEE80211_ACTION_MESHPEERING_CLOSE, 2940 args[0], args[1], args[2]); 2941 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2942 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2943 } else { 2944 vap->iv_stats.is_tx_nobuf++; 2945 ieee80211_free_node(ni); 2946 return ENOMEM; 2947 } 2948 } 2949 2950 static int 2951 mesh_send_action_meshlmetric(struct ieee80211_node *ni, 2952 int category, int action, void *arg0) 2953 { 2954 struct ieee80211vap *vap = ni->ni_vap; 2955 struct ieee80211com *ic = ni->ni_ic; 2956 struct ieee80211_meshlmetric_ie *ie = arg0; 2957 struct mbuf *m; 2958 uint8_t *frm; 2959 2960 if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) { 2961 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2962 ni, "%s", "send LINK METRIC REQUEST action"); 2963 } else { 2964 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 2965 ni, "send LINK METRIC REPLY action: metric 0x%x", 2966 ie->lm_metric); 2967 } 2968 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2969 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2970 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2971 ieee80211_ref_node(ni); 2972 2973 m = ieee80211_getmgtframe(&frm, 2974 ic->ic_headroom + sizeof(struct ieee80211_frame), 2975 sizeof(uint16_t) + /* action+category */ 2976 sizeof(struct ieee80211_meshlmetric_ie) 2977 ); 2978 if (m != NULL) { 2979 /* 2980 * mesh link metric 2981 * [1] category 2982 * [1] action 2983 * [tlv] mesh link metric 2984 */ 2985 *frm++ = category; 2986 *frm++ = action; 2987 frm = ieee80211_add_meshlmetric(frm, 2988 ie->lm_flags, ie->lm_metric); 2989 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2990 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m); 2991 } else { 2992 vap->iv_stats.is_tx_nobuf++; 2993 ieee80211_free_node(ni); 2994 return ENOMEM; 2995 } 2996 } 2997 2998 static int 2999 mesh_send_action_meshgate(struct ieee80211_node *ni, 3000 int category, int action, void *arg0) 3001 { 3002 struct ieee80211vap *vap = ni->ni_vap; 3003 struct ieee80211com *ic = ni->ni_ic; 3004 struct ieee80211_meshgann_ie *ie = arg0; 3005 struct mbuf *m; 3006 uint8_t *frm; 3007 3008 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3009 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 3010 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 3011 ieee80211_ref_node(ni); 3012 3013 m = ieee80211_getmgtframe(&frm, 3014 ic->ic_headroom + sizeof(struct ieee80211_frame), 3015 sizeof(uint16_t) + /* action+category */ 3016 IEEE80211_MESHGANN_BASE_SZ 3017 ); 3018 if (m != NULL) { 3019 /* 3020 * mesh link metric 3021 * [1] category 3022 * [1] action 3023 * [tlv] mesh gate annoucement 3024 */ 3025 *frm++ = category; 3026 *frm++ = action; 3027 frm = ieee80211_add_meshgate(frm, ie); 3028 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3029 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m); 3030 } else { 3031 vap->iv_stats.is_tx_nobuf++; 3032 ieee80211_free_node(ni); 3033 return ENOMEM; 3034 } 3035 } 3036 3037 static void 3038 mesh_peer_timeout_setup(struct ieee80211_node *ni) 3039 { 3040 switch (ni->ni_mlstate) { 3041 case IEEE80211_NODE_MESH_HOLDING: 3042 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 3043 break; 3044 case IEEE80211_NODE_MESH_CONFIRMRCV: 3045 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 3046 break; 3047 case IEEE80211_NODE_MESH_IDLE: 3048 ni->ni_mltval = 0; 3049 break; 3050 default: 3051 ni->ni_mltval = ieee80211_mesh_retrytimeout; 3052 break; 3053 } 3054 if (ni->ni_mltval) 3055 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 3056 mesh_peer_timeout_cb, ni); 3057 } 3058 3059 /* 3060 * Same as above but backoffs timer statisically 50%. 3061 */ 3062 static void 3063 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 3064 { 3065 uint32_t r; 3066 3067 r = arc4random(); 3068 ni->ni_mltval += r % ni->ni_mltval; 3069 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 3070 ni); 3071 } 3072 3073 static __inline void 3074 mesh_peer_timeout_stop(struct ieee80211_node *ni) 3075 { 3076 callout_drain(&ni->ni_mltimer); 3077 } 3078 3079 static void 3080 mesh_peer_backoff_cb(void *arg) 3081 { 3082 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3083 3084 /* After backoff timeout, try to peer automatically again. */ 3085 ni->ni_mlhcnt = 0; 3086 } 3087 3088 /* 3089 * Mesh Peer Link Management FSM timeout handling. 3090 */ 3091 static void 3092 mesh_peer_timeout_cb(void *arg) 3093 { 3094 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 3095 uint16_t args[3]; 3096 3097 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 3098 ni, "mesh link timeout, state %d, retry counter %d", 3099 ni->ni_mlstate, ni->ni_mlrcnt); 3100 3101 switch (ni->ni_mlstate) { 3102 case IEEE80211_NODE_MESH_IDLE: 3103 case IEEE80211_NODE_MESH_ESTABLISHED: 3104 break; 3105 case IEEE80211_NODE_MESH_OPENSNT: 3106 case IEEE80211_NODE_MESH_OPENRCV: 3107 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 3108 args[0] = ni->ni_mlpid; 3109 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 3110 ieee80211_send_action(ni, 3111 IEEE80211_ACTION_CAT_SELF_PROT, 3112 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3113 ni->ni_mlrcnt = 0; 3114 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3115 mesh_peer_timeout_setup(ni); 3116 } else { 3117 args[0] = ni->ni_mlpid; 3118 ieee80211_send_action(ni, 3119 IEEE80211_ACTION_CAT_SELF_PROT, 3120 IEEE80211_ACTION_MESHPEERING_OPEN, args); 3121 ni->ni_mlrcnt++; 3122 mesh_peer_timeout_backoff(ni); 3123 } 3124 break; 3125 case IEEE80211_NODE_MESH_CONFIRMRCV: 3126 args[0] = ni->ni_mlpid; 3127 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 3128 ieee80211_send_action(ni, 3129 IEEE80211_ACTION_CAT_SELF_PROT, 3130 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 3131 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 3132 mesh_peer_timeout_setup(ni); 3133 break; 3134 case IEEE80211_NODE_MESH_HOLDING: 3135 ni->ni_mlhcnt++; 3136 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding) 3137 callout_reset(&ni->ni_mlhtimer, 3138 ieee80211_mesh_backofftimeout, 3139 mesh_peer_backoff_cb, ni); 3140 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 3141 break; 3142 } 3143 } 3144 3145 static int 3146 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 3147 { 3148 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3149 3150 if (ie == NULL || ie[1] != ms->ms_idlen) 3151 return 1; 3152 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 3153 } 3154 3155 /* 3156 * Check if we are using the same algorithms for this mesh. 3157 */ 3158 static int 3159 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 3160 { 3161 const struct ieee80211_meshconf_ie *meshconf = 3162 (const struct ieee80211_meshconf_ie *) ie; 3163 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3164 3165 if (meshconf == NULL) 3166 return 1; 3167 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 3168 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3169 "unknown path selection algorithm: 0x%x\n", 3170 meshconf->conf_pselid); 3171 return 1; 3172 } 3173 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 3174 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3175 "unknown path metric algorithm: 0x%x\n", 3176 meshconf->conf_pmetid); 3177 return 1; 3178 } 3179 if (meshconf->conf_ccid != 0) { 3180 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3181 "unknown congestion control algorithm: 0x%x\n", 3182 meshconf->conf_ccid); 3183 return 1; 3184 } 3185 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 3186 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3187 "unknown sync algorithm: 0x%x\n", 3188 meshconf->conf_syncid); 3189 return 1; 3190 } 3191 if (meshconf->conf_authid != 0) { 3192 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3193 "unknown auth auth algorithm: 0x%x\n", 3194 meshconf->conf_pselid); 3195 return 1; 3196 } 3197 /* Not accepting peers */ 3198 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 3199 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 3200 "not accepting peers: 0x%x\n", meshconf->conf_cap); 3201 return 1; 3202 } 3203 return 0; 3204 } 3205 3206 static int 3207 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 3208 const uint8_t *ie) 3209 { 3210 const struct ieee80211_meshpeer_ie *meshpeer = 3211 (const struct ieee80211_meshpeer_ie *) ie; 3212 3213 if (meshpeer == NULL || 3214 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ || 3215 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ) 3216 return 1; 3217 if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) { 3218 IEEE80211_DPRINTF(vap, 3219 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 3220 "Only MPM protocol is supported (proto: 0x%02X)", 3221 meshpeer->peer_proto); 3222 return 1; 3223 } 3224 switch (subtype) { 3225 case IEEE80211_ACTION_MESHPEERING_OPEN: 3226 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ) 3227 return 1; 3228 break; 3229 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3230 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2) 3231 return 1; 3232 break; 3233 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3234 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2) 3235 return 1; 3236 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) && 3237 meshpeer->peer_linkid != 0) 3238 return 1; 3239 if (meshpeer->peer_rcode == 0) 3240 return 1; 3241 break; 3242 } 3243 return 0; 3244 } 3245 3246 /* 3247 * Add a Mesh ID IE to a frame. 3248 */ 3249 uint8_t * 3250 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 3251 { 3252 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3253 3254 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 3255 3256 *frm++ = IEEE80211_ELEMID_MESHID; 3257 *frm++ = ms->ms_idlen; 3258 memcpy(frm, ms->ms_id, ms->ms_idlen); 3259 return frm + ms->ms_idlen; 3260 } 3261 3262 /* 3263 * Add a Mesh Configuration IE to a frame. 3264 * For now just use HWMP routing, Airtime link metric, Null Congestion 3265 * Signaling, Null Sync Protocol and Null Authentication. 3266 */ 3267 uint8_t * 3268 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 3269 { 3270 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 3271 uint16_t caps; 3272 3273 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3274 3275 *frm++ = IEEE80211_ELEMID_MESHCONF; 3276 *frm++ = IEEE80211_MESH_CONF_SZ; 3277 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 3278 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 3279 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 3280 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 3281 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 3282 /* NB: set the number of neighbors before the rest */ 3283 *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ? 3284 IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1; 3285 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 3286 *frm |= IEEE80211_MESHCONF_FORM_GATE; 3287 frm += 1; 3288 caps = 0; 3289 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 3290 caps |= IEEE80211_MESHCONF_CAP_AP; 3291 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 3292 caps |= IEEE80211_MESHCONF_CAP_FWRD; 3293 *frm++ = caps; 3294 return frm; 3295 } 3296 3297 /* 3298 * Add a Mesh Peer Management IE to a frame. 3299 */ 3300 uint8_t * 3301 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 3302 uint16_t peerid, uint16_t reason) 3303 { 3304 3305 KASSERT(localid != 0, ("localid == 0")); 3306 3307 *frm++ = IEEE80211_ELEMID_MESHPEER; 3308 switch (subtype) { 3309 case IEEE80211_ACTION_MESHPEERING_OPEN: 3310 *frm++ = IEEE80211_MPM_BASE_SZ; /* length */ 3311 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3312 ADDSHORT(frm, localid); /* local ID */ 3313 break; 3314 case IEEE80211_ACTION_MESHPEERING_CONFIRM: 3315 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 3316 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3317 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3318 ADDSHORT(frm, localid); /* local ID */ 3319 ADDSHORT(frm, peerid); /* peer ID */ 3320 break; 3321 case IEEE80211_ACTION_MESHPEERING_CLOSE: 3322 if (peerid) 3323 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */ 3324 else 3325 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */ 3326 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */ 3327 ADDSHORT(frm, localid); /* local ID */ 3328 if (peerid) 3329 ADDSHORT(frm, peerid); /* peer ID */ 3330 ADDSHORT(frm, reason); 3331 break; 3332 } 3333 return frm; 3334 } 3335 3336 /* 3337 * Compute an Airtime Link Metric for the link with this node. 3338 * 3339 * Based on Draft 3.0 spec (11B.10, p.149). 3340 */ 3341 /* 3342 * Max 802.11s overhead. 3343 */ 3344 #define IEEE80211_MESH_MAXOVERHEAD \ 3345 (sizeof(struct ieee80211_qosframe_addr4) \ 3346 + sizeof(struct ieee80211_meshcntl_ae10) \ 3347 + sizeof(struct llc) \ 3348 + IEEE80211_ADDR_LEN \ 3349 + IEEE80211_WEP_IVLEN \ 3350 + IEEE80211_WEP_KIDLEN \ 3351 + IEEE80211_WEP_CRCLEN \ 3352 + IEEE80211_WEP_MICLEN \ 3353 + IEEE80211_CRC_LEN) 3354 uint32_t 3355 mesh_airtime_calc(struct ieee80211_node *ni) 3356 { 3357 #define M_BITS 8 3358 #define S_FACTOR (2 * M_BITS) 3359 struct ieee80211com *ic = ni->ni_ic; 3360 struct ifnet *ifp = ni->ni_vap->iv_ifp; 3361 static const int nbits = 8192 << M_BITS; 3362 uint32_t overhead, rate, errrate; 3363 uint64_t res; 3364 3365 /* Time to transmit a frame */ 3366 rate = ni->ni_txrate; 3367 overhead = ieee80211_compute_duration(ic->ic_rt, 3368 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 3369 /* Error rate in percentage */ 3370 /* XXX assuming small failures are ok */ 3371 #if defined(__DragonFly__) 3372 u_long icount; 3373 u_long ocount; 3374 IFNET_STAT_GET(ifp, ierrors, icount); 3375 IFNET_STAT_GET(ifp, oerrors, ocount); 3376 errrate = (((ocount + icount) / 100) << M_BITS) 3377 / 100; 3378 #else 3379 errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) + 3380 ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS) 3381 / 100; 3382 #endif 3383 res = (overhead + (nbits / rate)) * 3384 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 3385 3386 return (uint32_t)(res >> S_FACTOR); 3387 #undef M_BITS 3388 #undef S_FACTOR 3389 } 3390 3391 /* 3392 * Add a Mesh Link Metric report IE to a frame. 3393 */ 3394 uint8_t * 3395 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric) 3396 { 3397 *frm++ = IEEE80211_ELEMID_MESHLINK; 3398 *frm++ = 5; 3399 *frm++ = flags; 3400 ADDWORD(frm, metric); 3401 return frm; 3402 } 3403 3404 /* 3405 * Add a Mesh Gate Announcement IE to a frame. 3406 */ 3407 uint8_t * 3408 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie) 3409 { 3410 *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */ 3411 *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */ 3412 *frm++ = ie->gann_flags; 3413 *frm++ = ie->gann_hopcount; 3414 *frm++ = ie->gann_ttl; 3415 IEEE80211_ADDR_COPY(frm, ie->gann_addr); 3416 frm += 6; 3417 ADDWORD(frm, ie->gann_seq); 3418 ADDSHORT(frm, ie->gann_interval); 3419 return frm; 3420 } 3421 #undef ADDSHORT 3422 #undef ADDWORD 3423 3424 /* 3425 * Initialize any mesh-specific node state. 3426 */ 3427 void 3428 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 3429 { 3430 ni->ni_flags |= IEEE80211_NODE_QOS; 3431 #if defined(__DragonFly__) 3432 callout_init_mp(&ni->ni_mltimer); 3433 callout_init_mp(&ni->ni_mlhtimer); 3434 #else 3435 callout_init(&ni->ni_mltimer, 1); 3436 callout_init(&ni->ni_mlhtimer, 1); 3437 #endif 3438 } 3439 3440 /* 3441 * Cleanup any mesh-specific node state. 3442 */ 3443 void 3444 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 3445 { 3446 struct ieee80211vap *vap = ni->ni_vap; 3447 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3448 3449 callout_drain(&ni->ni_mltimer); 3450 callout_drain(&ni->ni_mlhtimer); 3451 /* NB: short-circuit callbacks after mesh_vdetach */ 3452 if (vap->iv_mesh != NULL) 3453 ms->ms_ppath->mpp_peerdown(ni); 3454 } 3455 3456 void 3457 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 3458 { 3459 ni->ni_meshidlen = ie[1]; 3460 memcpy(ni->ni_meshid, ie + 2, ie[1]); 3461 } 3462 3463 /* 3464 * Setup mesh-specific node state on neighbor discovery. 3465 */ 3466 void 3467 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 3468 const struct ieee80211_frame *wh, 3469 const struct ieee80211_scanparams *sp) 3470 { 3471 ieee80211_parse_meshid(ni, sp->meshid); 3472 } 3473 3474 void 3475 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 3476 struct ieee80211_beacon_offsets *bo) 3477 { 3478 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 3479 3480 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 3481 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 3482 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 3483 } 3484 } 3485 3486 static int 3487 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3488 { 3489 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3490 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3491 struct ieee80211_mesh_route *rt; 3492 struct ieee80211req_mesh_route *imr; 3493 size_t len, off; 3494 uint8_t *p; 3495 int error; 3496 3497 if (vap->iv_opmode != IEEE80211_M_MBSS) 3498 return ENOSYS; 3499 3500 error = 0; 3501 switch (ireq->i_type) { 3502 case IEEE80211_IOC_MESH_ID: 3503 ireq->i_len = ms->ms_idlen; 3504 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 3505 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 3506 break; 3507 case IEEE80211_IOC_MESH_AP: 3508 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 3509 break; 3510 case IEEE80211_IOC_MESH_FWRD: 3511 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 3512 break; 3513 case IEEE80211_IOC_MESH_GATE: 3514 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0; 3515 break; 3516 case IEEE80211_IOC_MESH_TTL: 3517 ireq->i_val = ms->ms_ttl; 3518 break; 3519 case IEEE80211_IOC_MESH_RTCMD: 3520 switch (ireq->i_val) { 3521 case IEEE80211_MESH_RTCMD_LIST: 3522 len = 0; 3523 MESH_RT_LOCK(ms); 3524 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3525 len += sizeof(*imr); 3526 } 3527 MESH_RT_UNLOCK(ms); 3528 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 3529 ireq->i_len = len; 3530 return ENOMEM; 3531 } 3532 ireq->i_len = len; 3533 /* XXX M_WAIT? */ 3534 #if defined(__DragonFly__) 3535 p = kmalloc(len, M_TEMP, M_INTWAIT | M_ZERO); 3536 #else 3537 p = IEEE80211_MALLOC(len, M_TEMP, 3538 IEEE80211_M_NOWAIT | IEEE80211_M_ZERO); 3539 #endif 3540 if (p == NULL) 3541 return ENOMEM; 3542 off = 0; 3543 MESH_RT_LOCK(ms); 3544 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 3545 if (off >= len) 3546 break; 3547 imr = (struct ieee80211req_mesh_route *) 3548 (p + off); 3549 IEEE80211_ADDR_COPY(imr->imr_dest, 3550 rt->rt_dest); 3551 IEEE80211_ADDR_COPY(imr->imr_nexthop, 3552 rt->rt_nexthop); 3553 imr->imr_metric = rt->rt_metric; 3554 imr->imr_nhops = rt->rt_nhops; 3555 imr->imr_lifetime = 3556 ieee80211_mesh_rt_update(rt, 0); 3557 imr->imr_lastmseq = rt->rt_lastmseq; 3558 imr->imr_flags = rt->rt_flags; /* last */ 3559 off += sizeof(*imr); 3560 } 3561 MESH_RT_UNLOCK(ms); 3562 error = copyout(p, (uint8_t *)ireq->i_data, 3563 ireq->i_len); 3564 IEEE80211_FREE(p, M_TEMP); 3565 break; 3566 case IEEE80211_MESH_RTCMD_FLUSH: 3567 case IEEE80211_MESH_RTCMD_ADD: 3568 case IEEE80211_MESH_RTCMD_DELETE: 3569 return EINVAL; 3570 default: 3571 return ENOSYS; 3572 } 3573 break; 3574 case IEEE80211_IOC_MESH_PR_METRIC: 3575 len = strlen(ms->ms_pmetric->mpm_descr); 3576 if (ireq->i_len < len) 3577 return EINVAL; 3578 ireq->i_len = len; 3579 error = copyout(ms->ms_pmetric->mpm_descr, 3580 (uint8_t *)ireq->i_data, len); 3581 break; 3582 case IEEE80211_IOC_MESH_PR_PATH: 3583 len = strlen(ms->ms_ppath->mpp_descr); 3584 if (ireq->i_len < len) 3585 return EINVAL; 3586 ireq->i_len = len; 3587 error = copyout(ms->ms_ppath->mpp_descr, 3588 (uint8_t *)ireq->i_data, len); 3589 break; 3590 default: 3591 return ENOSYS; 3592 } 3593 3594 return error; 3595 } 3596 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 3597 3598 static int 3599 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 3600 { 3601 struct ieee80211_mesh_state *ms = vap->iv_mesh; 3602 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 3603 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 3604 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 3605 int error; 3606 3607 if (vap->iv_opmode != IEEE80211_M_MBSS) 3608 return ENOSYS; 3609 3610 error = 0; 3611 switch (ireq->i_type) { 3612 case IEEE80211_IOC_MESH_ID: 3613 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 3614 return EINVAL; 3615 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 3616 if (error != 0) 3617 break; 3618 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 3619 ms->ms_idlen = ireq->i_len; 3620 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 3621 error = ENETRESET; 3622 break; 3623 case IEEE80211_IOC_MESH_AP: 3624 if (ireq->i_val) 3625 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 3626 else 3627 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 3628 error = ENETRESET; 3629 break; 3630 case IEEE80211_IOC_MESH_FWRD: 3631 if (ireq->i_val) 3632 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 3633 else 3634 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 3635 mesh_gatemode_setup(vap); 3636 break; 3637 case IEEE80211_IOC_MESH_GATE: 3638 if (ireq->i_val) 3639 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE; 3640 else 3641 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE; 3642 break; 3643 case IEEE80211_IOC_MESH_TTL: 3644 ms->ms_ttl = (uint8_t) ireq->i_val; 3645 break; 3646 case IEEE80211_IOC_MESH_RTCMD: 3647 switch (ireq->i_val) { 3648 case IEEE80211_MESH_RTCMD_LIST: 3649 return EINVAL; 3650 case IEEE80211_MESH_RTCMD_FLUSH: 3651 ieee80211_mesh_rt_flush(vap); 3652 break; 3653 case IEEE80211_MESH_RTCMD_ADD: 3654 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 3655 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 3656 return EINVAL; 3657 error = copyin(ireq->i_data, &tmpaddr, 3658 IEEE80211_ADDR_LEN); 3659 if (error == 0) 3660 ieee80211_mesh_discover(vap, tmpaddr, NULL); 3661 break; 3662 case IEEE80211_MESH_RTCMD_DELETE: 3663 ieee80211_mesh_rt_del(vap, ireq->i_data); 3664 break; 3665 default: 3666 return ENOSYS; 3667 } 3668 break; 3669 case IEEE80211_IOC_MESH_PR_METRIC: 3670 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3671 if (error == 0) { 3672 error = mesh_select_proto_metric(vap, tmpproto); 3673 if (error == 0) 3674 error = ENETRESET; 3675 } 3676 break; 3677 case IEEE80211_IOC_MESH_PR_PATH: 3678 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 3679 if (error == 0) { 3680 error = mesh_select_proto_path(vap, tmpproto); 3681 if (error == 0) 3682 error = ENETRESET; 3683 } 3684 break; 3685 default: 3686 return ENOSYS; 3687 } 3688 return error; 3689 } 3690 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 3691