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