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 * $FreeBSD: head/sys/net80211/ieee80211_mesh.c 203423 2010-02-03 10:12:49Z rpaulo $ 30 */ 31 32 /* 33 * IEEE 802.11s Mesh Point (MBSS) support. 34 * 35 * Based on March 2009, D3.0 802.11s draft spec. 36 */ 37 #include "opt_inet.h" 38 #include "opt_wlan.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/mbuf.h> 43 #include <sys/malloc.h> 44 #include <sys/kernel.h> 45 46 #include <sys/socket.h> 47 #include <sys/sockio.h> 48 #include <sys/endian.h> 49 #include <sys/errno.h> 50 #include <sys/proc.h> 51 #include <sys/sysctl.h> 52 53 #include <net/if.h> 54 #include <net/if_media.h> 55 #include <net/if_llc.h> 56 #include <net/ethernet.h> 57 #include <net/route.h> 58 59 #include <netproto/802_11/ieee80211_var.h> 60 #include <netproto/802_11/ieee80211_action.h> 61 #include <netproto/802_11/ieee80211_input.h> 62 #include <netproto/802_11/ieee80211_mesh.h> 63 64 static void mesh_rt_flush_invalid(struct ieee80211vap *); 65 static int mesh_select_proto_path(struct ieee80211vap *, const char *); 66 static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 67 static void mesh_vattach(struct ieee80211vap *); 68 static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 69 static void mesh_rt_cleanup_callout(void *); 70 static void mesh_linkchange(struct ieee80211_node *, 71 enum ieee80211_mesh_mlstate); 72 static void mesh_checkid(void *, struct ieee80211_node *); 73 static uint32_t mesh_generateid(struct ieee80211vap *); 74 static int mesh_checkpseq(struct ieee80211vap *, 75 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 76 static struct ieee80211_node * 77 mesh_find_txnode(struct ieee80211vap *, 78 const uint8_t [IEEE80211_ADDR_LEN]); 79 static void mesh_forward(struct ieee80211vap *, struct mbuf *, 80 const struct ieee80211_meshcntl *); 81 static int mesh_input(struct ieee80211_node *, struct mbuf *, int, int); 82 static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 83 int, int); 84 static void mesh_peer_timeout_setup(struct ieee80211_node *); 85 static void mesh_peer_timeout_backoff(struct ieee80211_node *); 86 static void mesh_peer_timeout_callout(void *); 87 static __inline void 88 mesh_peer_timeout_stop(struct ieee80211_node *); 89 static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 90 static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 91 static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 92 const uint8_t *); 93 uint32_t mesh_airtime_calc(struct ieee80211_node *); 94 95 /* 96 * Timeout values come from the specification and are in milliseconds. 97 */ 98 SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 99 "IEEE 802.11s parameters"); 100 static int ieee80211_mesh_retrytimeout = -1; 101 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, 102 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 103 "Retry timeout (msec)"); 104 static int ieee80211_mesh_holdingtimeout = -1; 105 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, 106 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 107 "Holding state timeout (msec)"); 108 static int ieee80211_mesh_confirmtimeout = -1; 109 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, 110 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 111 "Confirm state timeout (msec)"); 112 static int ieee80211_mesh_maxretries = 2; 113 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW, 114 &ieee80211_mesh_maxretries, 0, 115 "Maximum retries during peer link establishment"); 116 117 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 118 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 119 120 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 121 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 122 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 123 static ieee80211_recv_action_func mesh_recv_action_meshlmetric_req; 124 static ieee80211_recv_action_func mesh_recv_action_meshlmetric_rep; 125 126 static ieee80211_send_action_func mesh_send_action_meshpeering_open; 127 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 128 static ieee80211_send_action_func mesh_send_action_meshpeering_close; 129 static ieee80211_send_action_func mesh_send_action_meshlink_request; 130 static ieee80211_send_action_func mesh_send_action_meshlink_reply; 131 132 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 133 .mpm_descr = "AIRTIME", 134 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 135 .mpm_metric = mesh_airtime_calc, 136 }; 137 138 static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 139 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 140 141 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh", "802.11s routing table"); 142 143 /* 144 * Helper functions to manipulate the Mesh routing table. 145 */ 146 147 static struct ieee80211_mesh_route * 148 mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 149 const uint8_t dest[IEEE80211_ADDR_LEN]) 150 { 151 struct ieee80211_mesh_route *rt; 152 153 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 154 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 155 return rt; 156 } 157 return NULL; 158 } 159 160 static struct ieee80211_mesh_route * 161 mesh_rt_add_locked(struct ieee80211_mesh_state *ms, 162 const uint8_t dest[IEEE80211_ADDR_LEN]) 163 { 164 struct ieee80211_mesh_route *rt; 165 166 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 167 ("%s: adding broadcast to the routing table", __func__)); 168 169 rt = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_route)) + 170 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_INTWAIT | M_ZERO); 171 if (rt != NULL) { 172 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 173 rt->rt_priv = (void *)ALIGN(&rt[1]); 174 rt->rt_crtime = ticks; 175 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 176 } 177 return rt; 178 } 179 180 struct ieee80211_mesh_route * 181 ieee80211_mesh_rt_find(struct ieee80211vap *vap, 182 const uint8_t dest[IEEE80211_ADDR_LEN]) 183 { 184 struct ieee80211_mesh_state *ms = vap->iv_mesh; 185 struct ieee80211_mesh_route *rt; 186 187 rt = mesh_rt_find_locked(ms, dest); 188 return rt; 189 } 190 191 struct ieee80211_mesh_route * 192 ieee80211_mesh_rt_add(struct ieee80211vap *vap, 193 const uint8_t dest[IEEE80211_ADDR_LEN]) 194 { 195 struct ieee80211_mesh_state *ms = vap->iv_mesh; 196 struct ieee80211_mesh_route *rt; 197 198 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 199 ("%s: duplicate entry in the routing table", __func__)); 200 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 201 ("%s: adding self to the routing table", __func__)); 202 203 rt = mesh_rt_add_locked(ms, dest); 204 return rt; 205 } 206 207 /* 208 * Add a proxy route (as needed) for the specified destination. 209 */ 210 void 211 ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 212 const uint8_t dest[IEEE80211_ADDR_LEN]) 213 { 214 struct ieee80211_mesh_state *ms = vap->iv_mesh; 215 struct ieee80211_mesh_route *rt; 216 217 rt = mesh_rt_find_locked(ms, dest); 218 if (rt == NULL) { 219 rt = mesh_rt_add_locked(ms, dest); 220 if (rt == NULL) { 221 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 222 "%s", "unable to add proxy entry"); 223 vap->iv_stats.is_mesh_rtaddfailed++; 224 } else { 225 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 226 "%s", "add proxy entry"); 227 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 228 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 229 | IEEE80211_MESHRT_FLAGS_PROXY; 230 } 231 /* XXX assert PROXY? */ 232 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 233 struct ieee80211com *ic = vap->iv_ic; 234 /* 235 * Fix existing entry created by received frames from 236 * stations that have some memory of dest. We also 237 * flush any frames held on the staging queue; delivering 238 * them is too much trouble right now. 239 */ 240 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 241 "%s", "fix proxy entry"); 242 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 243 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 244 | IEEE80211_MESHRT_FLAGS_PROXY; 245 /* XXX belongs in hwmp */ 246 ieee80211_ageq_drain_node(&ic->ic_stageq, 247 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 248 /* XXX stat? */ 249 } 250 } 251 252 static __inline void 253 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 254 { 255 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 256 kfree(rt, M_80211_MESH_RT); 257 } 258 259 void 260 ieee80211_mesh_rt_del(struct ieee80211vap *vap, 261 const uint8_t dest[IEEE80211_ADDR_LEN]) 262 { 263 struct ieee80211_mesh_state *ms = vap->iv_mesh; 264 struct ieee80211_mesh_route *rt, *next; 265 266 TAILQ_FOREACH_MUTABLE(rt, &ms->ms_routes, rt_next, next) { 267 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 268 mesh_rt_del(ms, rt); 269 return; 270 } 271 } 272 } 273 274 void 275 ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 276 { 277 struct ieee80211_mesh_state *ms = vap->iv_mesh; 278 struct ieee80211_mesh_route *rt, *next; 279 280 if (ms == NULL) 281 return; 282 TAILQ_FOREACH_MUTABLE(rt, &ms->ms_routes, rt_next, next) 283 mesh_rt_del(ms, rt); 284 } 285 286 void 287 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 288 const uint8_t peer[IEEE80211_ADDR_LEN]) 289 { 290 struct ieee80211_mesh_state *ms = vap->iv_mesh; 291 struct ieee80211_mesh_route *rt, *next; 292 293 TAILQ_FOREACH_MUTABLE(rt, &ms->ms_routes, rt_next, next) { 294 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 295 mesh_rt_del(ms, rt); 296 } 297 } 298 299 /* 300 * Flush expired routing entries, i.e. those in invalid state for 301 * some time. 302 */ 303 static void 304 mesh_rt_flush_invalid(struct ieee80211vap *vap) 305 { 306 struct ieee80211_mesh_state *ms = vap->iv_mesh; 307 struct ieee80211_mesh_route *rt, *next; 308 309 if (ms == NULL) 310 return; 311 TAILQ_FOREACH_MUTABLE(rt, &ms->ms_routes, rt_next, next) { 312 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 && 313 ticks - rt->rt_crtime >= ms->ms_ppath->mpp_inact) 314 mesh_rt_del(ms, rt); 315 } 316 } 317 318 int 319 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 320 { 321 int i, firstempty = -1; 322 323 for (i = 0; i < NELEM(mesh_proto_paths); i++) { 324 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 325 IEEE80211_MESH_PROTO_DSZ) == 0) 326 return EEXIST; 327 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 328 firstempty = i; 329 } 330 if (firstempty < 0) 331 return ENOSPC; 332 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 333 mesh_proto_paths[firstempty].mpp_active = 1; 334 return 0; 335 } 336 337 int 338 ieee80211_mesh_register_proto_metric(const struct 339 ieee80211_mesh_proto_metric *mpm) 340 { 341 int i, firstempty = -1; 342 343 for (i = 0; i < NELEM(mesh_proto_metrics); i++) { 344 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 345 IEEE80211_MESH_PROTO_DSZ) == 0) 346 return EEXIST; 347 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 348 firstempty = i; 349 } 350 if (firstempty < 0) 351 return ENOSPC; 352 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 353 mesh_proto_metrics[firstempty].mpm_active = 1; 354 return 0; 355 } 356 357 static int 358 mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 359 { 360 struct ieee80211_mesh_state *ms = vap->iv_mesh; 361 int i; 362 363 for (i = 0; i < NELEM(mesh_proto_paths); i++) { 364 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 365 ms->ms_ppath = &mesh_proto_paths[i]; 366 return 0; 367 } 368 } 369 return ENOENT; 370 } 371 372 static int 373 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 374 { 375 struct ieee80211_mesh_state *ms = vap->iv_mesh; 376 int i; 377 378 for (i = 0; i < NELEM(mesh_proto_metrics); i++) { 379 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 380 ms->ms_pmetric = &mesh_proto_metrics[i]; 381 return 0; 382 } 383 } 384 return ENOENT; 385 } 386 387 static void 388 ieee80211_mesh_init(void) 389 { 390 391 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 392 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 393 394 /* 395 * Setup mesh parameters that depends on the clock frequency. 396 */ 397 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 398 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 399 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 400 401 /* 402 * Register action frame handlers. 403 */ 404 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 405 IEEE80211_ACTION_MESHPEERING_OPEN, 406 mesh_recv_action_meshpeering_open); 407 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 408 IEEE80211_ACTION_MESHPEERING_CONFIRM, 409 mesh_recv_action_meshpeering_confirm); 410 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 411 IEEE80211_ACTION_MESHPEERING_CLOSE, 412 mesh_recv_action_meshpeering_close); 413 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC, 414 IEEE80211_ACTION_MESHLMETRIC_REQ, mesh_recv_action_meshlmetric_req); 415 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC, 416 IEEE80211_ACTION_MESHLMETRIC_REP, mesh_recv_action_meshlmetric_rep); 417 418 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 419 IEEE80211_ACTION_MESHPEERING_OPEN, 420 mesh_send_action_meshpeering_open); 421 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 422 IEEE80211_ACTION_MESHPEERING_CONFIRM, 423 mesh_send_action_meshpeering_confirm); 424 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 425 IEEE80211_ACTION_MESHPEERING_CLOSE, 426 mesh_send_action_meshpeering_close); 427 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC, 428 IEEE80211_ACTION_MESHLMETRIC_REQ, 429 mesh_send_action_meshlink_request); 430 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC, 431 IEEE80211_ACTION_MESHLMETRIC_REP, 432 mesh_send_action_meshlink_reply); 433 434 /* 435 * Register Airtime Link Metric. 436 */ 437 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 438 439 } 440 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 441 442 void 443 ieee80211_mesh_attach(struct ieee80211com *ic) 444 { 445 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 446 } 447 448 void 449 ieee80211_mesh_detach(struct ieee80211com *ic) 450 { 451 } 452 453 static void 454 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 455 { 456 struct ieee80211com *ic = ni->ni_ic; 457 uint16_t args[3]; 458 459 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 460 args[0] = ni->ni_mlpid; 461 args[1] = ni->ni_mllid; 462 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 463 ieee80211_send_action(ni, 464 IEEE80211_ACTION_CAT_MESHPEERING, 465 IEEE80211_ACTION_MESHPEERING_CLOSE, 466 args); 467 } 468 callout_stop(&ni->ni_mltimer); 469 /* XXX belongs in hwmp */ 470 ieee80211_ageq_drain_node(&ic->ic_stageq, 471 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 472 } 473 474 static void 475 mesh_vdetach(struct ieee80211vap *vap) 476 { 477 struct ieee80211_mesh_state *ms = vap->iv_mesh; 478 479 callout_stop(&ms->ms_cleantimer); 480 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 481 NULL); 482 ieee80211_mesh_rt_flush(vap); 483 ms->ms_ppath->mpp_vdetach(vap); 484 kfree(vap->iv_mesh, M_80211_VAP); 485 vap->iv_mesh = NULL; 486 } 487 488 static void 489 mesh_vattach(struct ieee80211vap *vap) 490 { 491 struct ieee80211_mesh_state *ms; 492 vap->iv_newstate = mesh_newstate; 493 vap->iv_input = mesh_input; 494 vap->iv_opdetach = mesh_vdetach; 495 vap->iv_recv_mgmt = mesh_recv_mgmt; 496 ms = kmalloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 497 M_INTWAIT | M_ZERO); 498 vap->iv_mesh = ms; 499 ms->ms_seq = 0; 500 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 501 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 502 TAILQ_INIT(&ms->ms_routes); 503 callout_init_mp(&ms->ms_cleantimer); 504 mesh_select_proto_metric(vap, "AIRTIME"); 505 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 506 mesh_select_proto_path(vap, "HWMP"); 507 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 508 ms->ms_ppath->mpp_vattach(vap); 509 } 510 511 /* 512 * IEEE80211_M_MBSS vap state machine handler. 513 */ 514 static int 515 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 516 { 517 struct ieee80211_mesh_state *ms = vap->iv_mesh; 518 struct ieee80211com *ic = vap->iv_ic; 519 enum ieee80211_state ostate; 520 521 ostate = vap->iv_state; 522 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 523 __func__, ieee80211_state_name[ostate], 524 ieee80211_state_name[nstate], arg); 525 vap->iv_state = nstate; /* state transition */ 526 if (ostate != IEEE80211_S_SCAN) 527 ieee80211_cancel_scan(vap); /* background scan */ 528 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) 529 callout_stop(&ms->ms_cleantimer); 530 switch (nstate) { 531 case IEEE80211_S_INIT: 532 switch (ostate) { 533 case IEEE80211_S_SCAN: 534 ieee80211_cancel_scan(vap); 535 break; 536 case IEEE80211_S_CAC: 537 ieee80211_dfs_cac_stop(vap); 538 break; 539 case IEEE80211_S_RUN: 540 ieee80211_iterate_nodes(&ic->ic_sta, 541 mesh_vdetach_peers, NULL); 542 break; 543 default: 544 break; 545 } 546 if (ostate != IEEE80211_S_INIT) { 547 /* NB: optimize INIT -> INIT case */ 548 ieee80211_reset_bss(vap); 549 ieee80211_mesh_rt_flush(vap); 550 } 551 break; 552 case IEEE80211_S_SCAN: 553 switch (ostate) { 554 case IEEE80211_S_INIT: 555 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 556 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 557 ms->ms_idlen != 0) { 558 /* 559 * Already have a channel and a mesh ID; bypass 560 * the scan and startup immediately. 561 */ 562 ieee80211_create_ibss(vap, vap->iv_des_chan); 563 break; 564 } 565 /* 566 * Initiate a scan. We can come here as a result 567 * of an IEEE80211_IOC_SCAN_REQ too in which case 568 * the vap will be marked with IEEE80211_FEXT_SCANREQ 569 * and the scan request parameters will be present 570 * in iv_scanreq. Otherwise we do the default. 571 */ 572 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 573 ieee80211_check_scan(vap, 574 vap->iv_scanreq_flags, 575 vap->iv_scanreq_duration, 576 vap->iv_scanreq_mindwell, 577 vap->iv_scanreq_maxdwell, 578 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 579 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 580 } else 581 ieee80211_check_scan_current(vap); 582 break; 583 default: 584 break; 585 } 586 break; 587 case IEEE80211_S_CAC: 588 /* 589 * Start CAC on a DFS channel. We come here when starting 590 * a bss on a DFS channel (see ieee80211_create_ibss). 591 */ 592 ieee80211_dfs_cac_start(vap); 593 break; 594 case IEEE80211_S_RUN: 595 switch (ostate) { 596 case IEEE80211_S_INIT: 597 /* 598 * Already have a channel; bypass the 599 * scan and startup immediately. 600 * Note that ieee80211_create_ibss will call 601 * back to do a RUN->RUN state change. 602 */ 603 ieee80211_create_ibss(vap, 604 ieee80211_ht_adjust_channel(ic, 605 ic->ic_curchan, vap->iv_flags_ht)); 606 /* NB: iv_bss is changed on return */ 607 break; 608 case IEEE80211_S_CAC: 609 /* 610 * NB: This is the normal state change when CAC 611 * expires and no radar was detected; no need to 612 * clear the CAC timer as it's already expired. 613 */ 614 /* fall thru... */ 615 case IEEE80211_S_CSA: 616 #if 0 617 /* 618 * Shorten inactivity timer of associated stations 619 * to weed out sta's that don't follow a CSA. 620 */ 621 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 622 #endif 623 /* 624 * Update bss node channel to reflect where 625 * we landed after CSA. 626 */ 627 ieee80211_node_set_chan(vap->iv_bss, 628 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 629 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 630 /* XXX bypass debug msgs */ 631 break; 632 case IEEE80211_S_SCAN: 633 case IEEE80211_S_RUN: 634 #ifdef IEEE80211_DEBUG 635 if (ieee80211_msg_debug(vap)) { 636 struct ieee80211_node *ni = vap->iv_bss; 637 ieee80211_note(vap, 638 "synchronized with %6D meshid ", 639 ni->ni_meshid, ":"); 640 ieee80211_print_essid(ni->ni_meshid, 641 ni->ni_meshidlen); 642 /* XXX MCS/HT */ 643 kprintf(" channel %d\n", 644 ieee80211_chan2ieee(ic, ic->ic_curchan)); 645 } 646 #endif 647 break; 648 default: 649 break; 650 } 651 ieee80211_node_authorize(vap->iv_bss); 652 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 653 mesh_rt_cleanup_callout, vap); 654 break; 655 default: 656 break; 657 } 658 /* NB: ostate not nstate */ 659 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 660 return 0; 661 } 662 663 static void 664 mesh_rt_cleanup_callout(void *arg) 665 { 666 struct ieee80211vap *vap = arg; 667 struct ieee80211_mesh_state *ms = vap->iv_mesh; 668 669 wlan_serialize_enter(); 670 mesh_rt_flush_invalid(vap); 671 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 672 mesh_rt_cleanup_callout, vap); 673 wlan_serialize_exit(); 674 } 675 676 677 /* 678 * Helper function to note the Mesh Peer Link FSM change. 679 */ 680 static void 681 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 682 { 683 struct ieee80211vap *vap = ni->ni_vap; 684 struct ieee80211_mesh_state *ms = vap->iv_mesh; 685 #ifdef IEEE80211_DEBUG 686 static const char *meshlinkstates[] = { 687 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 688 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 689 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 690 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 691 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 692 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 693 }; 694 #endif 695 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 696 ni, "peer link: %s -> %s", 697 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 698 699 /* track neighbor count */ 700 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 701 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 702 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 703 ms->ms_neighbors++; 704 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 705 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 706 state != IEEE80211_NODE_MESH_ESTABLISHED) { 707 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 708 ms->ms_neighbors--; 709 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 710 } 711 ni->ni_mlstate = state; 712 switch (state) { 713 case IEEE80211_NODE_MESH_HOLDING: 714 ms->ms_ppath->mpp_peerdown(ni); 715 break; 716 case IEEE80211_NODE_MESH_ESTABLISHED: 717 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 718 break; 719 default: 720 break; 721 } 722 } 723 724 /* 725 * Helper function to generate a unique local ID required for mesh 726 * peer establishment. 727 */ 728 static void 729 mesh_checkid(void *arg, struct ieee80211_node *ni) 730 { 731 uint16_t *r = arg; 732 733 if (*r == ni->ni_mllid) 734 *(uint16_t *)arg = 0; 735 } 736 737 static uint32_t 738 mesh_generateid(struct ieee80211vap *vap) 739 { 740 int maxiter = 4; 741 uint16_t r; 742 743 do { 744 get_random_bytes(&r, 2); 745 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 746 maxiter--; 747 } while (r == 0 && maxiter > 0); 748 return r; 749 } 750 751 /* 752 * Verifies if we already received this packet by checking its 753 * sequence number. 754 * Returns 0 if the frame is to be accepted, 1 otherwise. 755 */ 756 static int 757 mesh_checkpseq(struct ieee80211vap *vap, 758 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 759 { 760 struct ieee80211_mesh_route *rt; 761 762 rt = ieee80211_mesh_rt_find(vap, source); 763 if (rt == NULL) { 764 rt = ieee80211_mesh_rt_add(vap, source); 765 if (rt == NULL) { 766 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 767 "%s", "add mcast route failed"); 768 vap->iv_stats.is_mesh_rtaddfailed++; 769 return 1; 770 } 771 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 772 "add mcast route, mesh seqno %d", seq); 773 rt->rt_lastmseq = seq; 774 return 0; 775 } 776 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 777 return 1; 778 } else { 779 rt->rt_lastmseq = seq; 780 return 0; 781 } 782 } 783 784 /* 785 * Iterate the routing table and locate the next hop. 786 */ 787 static struct ieee80211_node * 788 mesh_find_txnode(struct ieee80211vap *vap, 789 const uint8_t dest[IEEE80211_ADDR_LEN]) 790 { 791 struct ieee80211_mesh_route *rt; 792 793 rt = ieee80211_mesh_rt_find(vap, dest); 794 if (rt == NULL) 795 return NULL; 796 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 || 797 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) { 798 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 799 "%s: !valid or proxy, flags 0x%x", __func__, rt->rt_flags); 800 /* XXX stat */ 801 return NULL; 802 } 803 return ieee80211_find_txnode(vap, rt->rt_nexthop); 804 } 805 806 /* 807 * Forward the specified frame. 808 * Decrement the TTL and set TA to our MAC address. 809 */ 810 static void 811 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 812 const struct ieee80211_meshcntl *mc) 813 { 814 struct ieee80211com *ic = vap->iv_ic; 815 struct ieee80211_mesh_state *ms = vap->iv_mesh; 816 struct ifnet *ifp = vap->iv_ifp; 817 struct ifnet *parent = ic->ic_ifp; 818 const struct ieee80211_frame *wh = 819 mtod(m, const struct ieee80211_frame *); 820 struct mbuf *mcopy; 821 struct ieee80211_meshcntl *mccopy; 822 struct ieee80211_frame *whcopy; 823 struct ieee80211_node *ni; 824 int err; 825 826 if (mc->mc_ttl == 0) { 827 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 828 "%s", "frame not fwd'd, ttl 0"); 829 vap->iv_stats.is_mesh_fwd_ttl++; 830 return; 831 } 832 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 833 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 834 "%s", "frame not fwd'd, fwding disabled"); 835 vap->iv_stats.is_mesh_fwd_disabled++; 836 return; 837 } 838 mcopy = m_dup(m, MB_DONTWAIT); 839 if (mcopy == NULL) { 840 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 841 "%s", "frame not fwd'd, cannot dup"); 842 vap->iv_stats.is_mesh_fwd_nobuf++; 843 ifp->if_oerrors++; 844 return; 845 } 846 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 847 sizeof(struct ieee80211_meshcntl)); 848 if (mcopy == NULL) { 849 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 850 "%s", "frame not fwd'd, too short"); 851 vap->iv_stats.is_mesh_fwd_tooshort++; 852 ifp->if_oerrors++; 853 m_freem(mcopy); 854 return; 855 } 856 whcopy = mtod(mcopy, struct ieee80211_frame *); 857 mccopy = (struct ieee80211_meshcntl *) 858 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 859 /* XXX clear other bits? */ 860 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 861 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 862 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 863 ni = ieee80211_ref_node(vap->iv_bss); 864 mcopy->m_flags |= M_MCAST; 865 } else { 866 ni = mesh_find_txnode(vap, whcopy->i_addr3); 867 if (ni == NULL) { 868 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 869 "%s", "frame not fwd'd, no path"); 870 vap->iv_stats.is_mesh_fwd_nopath++; 871 m_freem(mcopy); 872 return; 873 } 874 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 875 } 876 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 877 mccopy->mc_ttl--; 878 879 /* XXX calculate priority so drivers can find the tx queue */ 880 M_WME_SETAC(mcopy, WME_AC_BE); 881 882 /* XXX do we know m_nextpkt is NULL? */ 883 mcopy->m_pkthdr.rcvif = (void *) ni; 884 err = ieee80211_handoff(parent, mcopy); 885 if (err != 0) { 886 /* NB: IFQ_HANDOFF reclaims mbuf */ 887 ieee80211_free_node(ni); 888 } else { 889 ifp->if_opackets++; 890 } 891 } 892 893 static struct mbuf * 894 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 895 { 896 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 897 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 898 sizeof(struct ieee80211_meshcntl_ae11)]; 899 const struct ieee80211_qosframe_addr4 *wh; 900 const struct ieee80211_meshcntl_ae10 *mc; 901 struct ether_header *eh; 902 struct llc *llc; 903 int ae; 904 905 if (m->m_len < hdrlen + sizeof(*llc) && 906 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 907 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 908 "discard data frame: %s", "m_pullup failed"); 909 vap->iv_stats.is_rx_tooshort++; 910 return NULL; 911 } 912 memcpy(b, mtod(m, caddr_t), hdrlen); 913 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 914 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 915 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 916 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 917 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 918 919 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 920 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 921 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 922 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 923 !(llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 924 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 925 llc = NULL; 926 } else { 927 m_adj(m, hdrlen - sizeof(*eh)); 928 } 929 eh = mtod(m, struct ether_header *); 930 ae = mc->mc_flags & 3; 931 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 932 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 933 if (ae == 0) { 934 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 935 } else if (ae == 1) { 936 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr4); 937 } else { 938 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 939 (const struct ieee80211_frame *)wh, NULL, 940 "bad AE %d", ae); 941 vap->iv_stats.is_mesh_badae++; 942 m_freem(m); 943 return NULL; 944 } 945 } else { 946 if (ae == 0) { 947 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 948 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 949 } else if (ae == 2) { 950 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr4); 951 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr5); 952 } else { 953 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 954 (const struct ieee80211_frame *)wh, NULL, 955 "bad AE %d", ae); 956 vap->iv_stats.is_mesh_badae++; 957 m_freem(m); 958 return NULL; 959 } 960 } 961 #ifdef ALIGNED_POINTER 962 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 963 m = ieee80211_realign(vap, m, sizeof(*eh)); 964 if (m == NULL) 965 return NULL; 966 } 967 #endif /* ALIGNED_POINTER */ 968 if (llc != NULL) { 969 eh = mtod(m, struct ether_header *); 970 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 971 } 972 return m; 973 #undef WDIR 974 } 975 976 /* 977 * Return non-zero if the unicast mesh data frame should be processed 978 * locally. Frames that are not proxy'd have our address, otherwise 979 * we need to consult the routing table to look for a proxy entry. 980 */ 981 static __inline int 982 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 983 const struct ieee80211_meshcntl *mc) 984 { 985 int ae = mc->mc_flags & 3; 986 987 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 988 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 989 KASSERT(ae == 0 || ae == 2, ("bad AE %d", ae)); 990 if (ae == 2) { /* ucast w/ proxy */ 991 const struct ieee80211_meshcntl_ae10 *mc10 = 992 (const struct ieee80211_meshcntl_ae10 *) mc; 993 struct ieee80211_mesh_route *rt = 994 ieee80211_mesh_rt_find(vap, mc10->mc_addr4); 995 /* check for proxy route to ourself */ 996 return (rt != NULL && 997 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 998 } else /* ucast w/o proxy */ 999 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1000 } 1001 1002 static int 1003 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 1004 { 1005 #define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) 1006 #define HAS_SEQ(type) ((type & 0x4) == 0) 1007 struct ieee80211vap *vap = ni->ni_vap; 1008 struct ieee80211com *ic = ni->ni_ic; 1009 struct ifnet *ifp = vap->iv_ifp; 1010 struct ieee80211_frame *wh; 1011 const struct ieee80211_meshcntl *mc; 1012 int hdrspace, meshdrlen, need_tap; 1013 uint8_t dir, type, subtype, qos; 1014 uint32_t seq; 1015 uint8_t *addr; 1016 ieee80211_seq rxseq; 1017 1018 KASSERT(ni != NULL, ("null node")); 1019 ni->ni_inact = ni->ni_inact_reload; 1020 1021 need_tap = 1; /* mbuf need to be tapped. */ 1022 type = -1; /* undefined */ 1023 1024 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1025 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1026 ni->ni_macaddr, NULL, 1027 "too short (1): len %u", m->m_pkthdr.len); 1028 vap->iv_stats.is_rx_tooshort++; 1029 goto out; 1030 } 1031 /* 1032 * Bit of a cheat here, we use a pointer for a 3-address 1033 * frame format but don't reference fields past outside 1034 * ieee80211_frame_min w/o first validating the data is 1035 * present. 1036 */ 1037 wh = mtod(m, struct ieee80211_frame *); 1038 1039 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1040 IEEE80211_FC0_VERSION_0) { 1041 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1042 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1043 vap->iv_stats.is_rx_badversion++; 1044 goto err; 1045 } 1046 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1047 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1048 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1049 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1050 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1051 ni->ni_noise = nf; 1052 if (HAS_SEQ(type)) { 1053 uint8_t tid = ieee80211_gettid(wh); 1054 1055 if (IEEE80211_QOS_HAS_SEQ(wh) && 1056 TID_TO_WME_AC(tid) >= WME_AC_VI) 1057 ic->ic_wme.wme_hipri_traffic++; 1058 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1059 if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && 1060 (wh->i_fc[1] & IEEE80211_FC1_RETRY) && 1061 SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { 1062 /* duplicate, discard */ 1063 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1064 wh->i_addr1, "duplicate", 1065 "seqno <%u,%u> fragno <%u,%u> tid %u", 1066 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1067 ni->ni_rxseqs[tid] >> 1068 IEEE80211_SEQ_SEQ_SHIFT, 1069 rxseq & IEEE80211_SEQ_FRAG_MASK, 1070 ni->ni_rxseqs[tid] & 1071 IEEE80211_SEQ_FRAG_MASK, 1072 tid); 1073 vap->iv_stats.is_rx_dup++; 1074 IEEE80211_NODE_STAT(ni, rx_dup); 1075 goto out; 1076 } 1077 ni->ni_rxseqs[tid] = rxseq; 1078 } 1079 } 1080 #ifdef IEEE80211_DEBUG 1081 /* 1082 * It's easier, but too expensive, to simulate different mesh 1083 * topologies by consulting the ACL policy very early, so do this 1084 * only under DEBUG. 1085 * 1086 * NB: this check is also done upon peering link initiation. 1087 */ 1088 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh->i_addr2)) { 1089 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1090 wh, NULL, "%s", "disallowed by ACL"); 1091 vap->iv_stats.is_rx_acl++; 1092 goto out; 1093 } 1094 #endif 1095 switch (type) { 1096 case IEEE80211_FC0_TYPE_DATA: 1097 if (ni == vap->iv_bss) 1098 goto out; 1099 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1100 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1101 ni->ni_macaddr, NULL, 1102 "peer link not yet established (%d)", 1103 ni->ni_mlstate); 1104 vap->iv_stats.is_mesh_nolink++; 1105 goto out; 1106 } 1107 if (dir != IEEE80211_FC1_DIR_FROMDS && 1108 dir != IEEE80211_FC1_DIR_DSTODS) { 1109 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1110 wh, "data", "incorrect dir 0x%x", dir); 1111 vap->iv_stats.is_rx_wrongdir++; 1112 goto err; 1113 } 1114 /* pull up enough to get to the mesh control */ 1115 hdrspace = ieee80211_hdrspace(ic, wh); 1116 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1117 (m = m_pullup(m, hdrspace + 1118 sizeof(struct ieee80211_meshcntl))) == NULL) { 1119 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1120 ni->ni_macaddr, NULL, 1121 "data too short: expecting %u", hdrspace); 1122 vap->iv_stats.is_rx_tooshort++; 1123 goto out; /* XXX */ 1124 } 1125 /* 1126 * Now calculate the full extent of the headers. Note 1127 * mesh_decap will pull up anything we didn't get 1128 * above when it strips the 802.11 headers. 1129 */ 1130 mc = (const struct ieee80211_meshcntl *) 1131 (mtod(m, const uint8_t *) + hdrspace); 1132 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1133 (mc->mc_flags & 3) * IEEE80211_ADDR_LEN; 1134 hdrspace += meshdrlen; 1135 seq = LE_READ_4(mc->mc_seq); 1136 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1137 addr = wh->i_addr3; 1138 else 1139 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1140 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1141 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1142 addr, "data", "%s", "not to me"); 1143 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1144 goto out; 1145 } 1146 if (mesh_checkpseq(vap, addr, seq) != 0) { 1147 vap->iv_stats.is_rx_dup++; 1148 goto out; 1149 } 1150 1151 /* 1152 * Potentially forward packet. See table s36 (p140) 1153 * for the rules. XXX tap fwd'd packets not for us? 1154 */ 1155 if (dir == IEEE80211_FC1_DIR_FROMDS || 1156 !mesh_isucastforme(vap, wh, mc)) { 1157 mesh_forward(vap, m, mc); 1158 if (dir == IEEE80211_FC1_DIR_DSTODS) 1159 goto out; 1160 /* NB: fall thru to deliver mcast frames locally */ 1161 } 1162 1163 /* 1164 * Save QoS bits for use below--before we strip the header. 1165 */ 1166 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 1167 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 1168 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 1169 ((struct ieee80211_qosframe *)wh)->i_qos[0]; 1170 } else 1171 qos = 0; 1172 /* 1173 * Next up, any fragmentation. 1174 */ 1175 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1176 m = ieee80211_defrag(ni, m, hdrspace); 1177 if (m == NULL) { 1178 /* Fragment dropped or frame not complete yet */ 1179 goto out; 1180 } 1181 } 1182 wh = NULL; /* no longer valid, catch any uses */ 1183 1184 if (ieee80211_radiotap_active_vap(vap)) 1185 ieee80211_radiotap_rx(vap, m); 1186 need_tap = 0; 1187 1188 /* 1189 * Finally, strip the 802.11 header. 1190 */ 1191 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1192 if (m == NULL) { 1193 /* XXX mask bit to check for both */ 1194 /* don't count Null data frames as errors */ 1195 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1196 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1197 goto out; 1198 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1199 ni->ni_macaddr, "data", "%s", "decap error"); 1200 vap->iv_stats.is_rx_decap++; 1201 IEEE80211_NODE_STAT(ni, rx_decap); 1202 goto err; 1203 } 1204 if (qos & IEEE80211_QOS_AMSDU) { 1205 m = ieee80211_decap_amsdu(ni, m); 1206 if (m == NULL) 1207 return IEEE80211_FC0_TYPE_DATA; 1208 } 1209 ieee80211_deliver_data(vap, ni, m); 1210 return type; 1211 case IEEE80211_FC0_TYPE_MGT: 1212 vap->iv_stats.is_rx_mgmt++; 1213 IEEE80211_NODE_STAT(ni, rx_mgmt); 1214 if (dir != IEEE80211_FC1_DIR_NODS) { 1215 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1216 wh, "mgt", "incorrect dir 0x%x", dir); 1217 vap->iv_stats.is_rx_wrongdir++; 1218 goto err; 1219 } 1220 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1221 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1222 ni->ni_macaddr, "mgt", "too short: len %u", 1223 m->m_pkthdr.len); 1224 vap->iv_stats.is_rx_tooshort++; 1225 goto out; 1226 } 1227 #ifdef IEEE80211_DEBUG 1228 if ((ieee80211_msg_debug(vap) && 1229 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1230 ieee80211_msg_dumppkts(vap)) { 1231 if_printf(ifp, "received %s from %6D rssi %d\n", 1232 ieee80211_mgt_subtype_name[subtype >> 1233 IEEE80211_FC0_SUBTYPE_SHIFT], 1234 wh->i_addr2, ":", rssi); 1235 } 1236 #endif 1237 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1238 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1239 wh, NULL, "%s", "WEP set but not permitted"); 1240 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1241 goto out; 1242 } 1243 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1244 goto out; 1245 case IEEE80211_FC0_TYPE_CTL: 1246 vap->iv_stats.is_rx_ctl++; 1247 IEEE80211_NODE_STAT(ni, rx_ctrl); 1248 goto out; 1249 default: 1250 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1251 wh, "bad", "frame type 0x%x", type); 1252 /* should not come here */ 1253 break; 1254 } 1255 err: 1256 ifp->if_ierrors++; 1257 out: 1258 if (m != NULL) { 1259 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1260 ieee80211_radiotap_rx(vap, m); 1261 m_freem(m); 1262 } 1263 return type; 1264 } 1265 1266 static void 1267 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1268 int rssi, int nf) 1269 { 1270 struct ieee80211vap *vap = ni->ni_vap; 1271 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1272 struct ieee80211com *ic = ni->ni_ic; 1273 struct ieee80211_frame *wh; 1274 uint8_t *frm, *efrm; 1275 1276 wh = mtod(m0, struct ieee80211_frame *); 1277 frm = (uint8_t *)&wh[1]; 1278 efrm = mtod(m0, uint8_t *) + m0->m_len; 1279 switch (subtype) { 1280 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1281 case IEEE80211_FC0_SUBTYPE_BEACON: 1282 { 1283 struct ieee80211_scanparams scan; 1284 /* 1285 * We process beacon/probe response 1286 * frames to discover neighbors. 1287 */ 1288 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1289 return; 1290 /* 1291 * Count frame now that we know it's to be processed. 1292 */ 1293 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1294 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1295 IEEE80211_NODE_STAT(ni, rx_beacons); 1296 } else 1297 IEEE80211_NODE_STAT(ni, rx_proberesp); 1298 /* 1299 * If scanning, just pass information to the scan module. 1300 */ 1301 if (ic->ic_flags & IEEE80211_F_SCAN) { 1302 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1303 /* 1304 * Actively scanning a channel marked passive; 1305 * send a probe request now that we know there 1306 * is 802.11 traffic present. 1307 * 1308 * XXX check if the beacon we recv'd gives 1309 * us what we need and suppress the probe req 1310 */ 1311 ieee80211_probe_curchan(vap, 1); 1312 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1313 } 1314 ieee80211_add_scan(vap, &scan, wh, 1315 subtype, rssi, nf); 1316 return; 1317 } 1318 1319 /* The rest of this code assumes we are running */ 1320 if (vap->iv_state != IEEE80211_S_RUN) 1321 return; 1322 /* 1323 * Ignore non-mesh STAs. 1324 */ 1325 if ((scan.capinfo & 1326 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1327 scan.meshid == NULL || scan.meshconf == NULL) { 1328 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1329 wh, "beacon", "%s", "not a mesh sta"); 1330 vap->iv_stats.is_mesh_wrongmesh++; 1331 return; 1332 } 1333 /* 1334 * Ignore STAs for other mesh networks. 1335 */ 1336 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1337 mesh_verify_meshconf(vap, scan.meshconf)) { 1338 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1339 wh, "beacon", "%s", "not for our mesh"); 1340 vap->iv_stats.is_mesh_wrongmesh++; 1341 return; 1342 } 1343 /* 1344 * Peer only based on the current ACL policy. 1345 */ 1346 if (vap->iv_acl != NULL && 1347 !vap->iv_acl->iac_check(vap, wh->i_addr2)) { 1348 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1349 wh, NULL, "%s", "disallowed by ACL"); 1350 vap->iv_stats.is_rx_acl++; 1351 return; 1352 } 1353 /* 1354 * Do neighbor discovery. 1355 */ 1356 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1357 /* 1358 * Create a new entry in the neighbor table. 1359 */ 1360 ni = ieee80211_add_neighbor(vap, wh, &scan); 1361 } 1362 /* 1363 * Automatically peer with discovered nodes if possible. 1364 * XXX backoff on repeated failure 1365 */ 1366 if (ni != vap->iv_bss && 1367 (ms->ms_flags & IEEE80211_MESHFLAGS_AP) && 1368 ni->ni_mlstate == IEEE80211_NODE_MESH_IDLE) { 1369 uint16_t args[1]; 1370 1371 ni->ni_mlpid = mesh_generateid(vap); 1372 if (ni->ni_mlpid == 0) 1373 return; 1374 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1375 args[0] = ni->ni_mlpid; 1376 ieee80211_send_action(ni, 1377 IEEE80211_ACTION_CAT_MESHPEERING, 1378 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1379 ni->ni_mlrcnt = 0; 1380 mesh_peer_timeout_setup(ni); 1381 } 1382 break; 1383 } 1384 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1385 { 1386 uint8_t *ssid, *meshid, *rates, *xrates; 1387 1388 if (vap->iv_state != IEEE80211_S_RUN) { 1389 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1390 wh, NULL, "wrong state %s", 1391 ieee80211_state_name[vap->iv_state]); 1392 vap->iv_stats.is_rx_mgtdiscard++; 1393 return; 1394 } 1395 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1396 /* frame must be directed */ 1397 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1398 wh, NULL, "%s", "not unicast"); 1399 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1400 return; 1401 } 1402 /* 1403 * prreq frame format 1404 * [tlv] ssid 1405 * [tlv] supported rates 1406 * [tlv] extended supported rates 1407 * [tlv] mesh id 1408 */ 1409 ssid = meshid = rates = xrates = NULL; 1410 while (efrm - frm > 1) { 1411 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1412 switch (*frm) { 1413 case IEEE80211_ELEMID_SSID: 1414 ssid = frm; 1415 break; 1416 case IEEE80211_ELEMID_RATES: 1417 rates = frm; 1418 break; 1419 case IEEE80211_ELEMID_XRATES: 1420 xrates = frm; 1421 break; 1422 case IEEE80211_ELEMID_MESHID: 1423 meshid = frm; 1424 break; 1425 } 1426 frm += frm[2] + 2; 1427 } 1428 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1429 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1430 if (xrates != NULL) 1431 IEEE80211_VERIFY_ELEMENT(xrates, 1432 IEEE80211_RATE_MAXSIZE - rates[1], return); 1433 if (meshid != NULL) { 1434 IEEE80211_VERIFY_ELEMENT(meshid, 1435 IEEE80211_MESHID_LEN, return); 1436 /* NB: meshid, not ssid */ 1437 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 1438 } 1439 1440 /* XXX find a better class or define it's own */ 1441 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1442 "%s", "recv probe req"); 1443 /* 1444 * Some legacy 11b clients cannot hack a complete 1445 * probe response frame. When the request includes 1446 * only a bare-bones rate set, communicate this to 1447 * the transmit side. 1448 */ 1449 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 1450 break; 1451 } 1452 case IEEE80211_FC0_SUBTYPE_ACTION: 1453 if (vap->iv_state != IEEE80211_S_RUN) { 1454 vap->iv_stats.is_rx_mgtdiscard++; 1455 break; 1456 } 1457 /* 1458 * We received an action for an unknown neighbor. 1459 * XXX: wait for it to beacon or create ieee80211_node? 1460 */ 1461 if (ni == vap->iv_bss) { 1462 IEEE80211_DISCARD(vap, IEEE80211_MSG_MESH, 1463 wh, NULL, "%s", "unknown node"); 1464 vap->iv_stats.is_rx_mgtdiscard++; 1465 break; 1466 } 1467 /* 1468 * Discard if not for us. 1469 */ 1470 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1471 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1472 IEEE80211_DISCARD(vap, IEEE80211_MSG_MESH, 1473 wh, NULL, "%s", "not for me"); 1474 vap->iv_stats.is_rx_mgtdiscard++; 1475 break; 1476 } 1477 /* XXX parse_action is a bit useless now */ 1478 if (ieee80211_parse_action(ni, m0) == 0) 1479 ic->ic_recv_action(ni, wh, frm, efrm); 1480 break; 1481 case IEEE80211_FC0_SUBTYPE_AUTH: 1482 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1483 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1484 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1485 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 1486 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1487 case IEEE80211_FC0_SUBTYPE_DISASSOC: 1488 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1489 wh, NULL, "%s", "not handled"); 1490 vap->iv_stats.is_rx_mgtdiscard++; 1491 return; 1492 default: 1493 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1494 wh, "mgt", "subtype 0x%x not handled", subtype); 1495 vap->iv_stats.is_rx_badsubtype++; 1496 break; 1497 } 1498 } 1499 1500 /* 1501 * Parse meshpeering action ie's for open+confirm frames; the 1502 * important bits are returned in the supplied structure. 1503 */ 1504 static const struct ieee80211_meshpeer_ie * 1505 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 1506 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 1507 const uint8_t *frm, const uint8_t *efrm, 1508 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 1509 { 1510 struct ieee80211vap *vap = ni->ni_vap; 1511 const struct ieee80211_meshpeer_ie *mpie; 1512 const uint8_t *meshid, *meshconf, *meshpeer; 1513 1514 meshid = meshconf = meshpeer = NULL; 1515 while (efrm - frm > 1) { 1516 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 1517 switch (*frm) { 1518 case IEEE80211_ELEMID_MESHID: 1519 meshid = frm; 1520 break; 1521 case IEEE80211_ELEMID_MESHCONF: 1522 meshconf = frm; 1523 break; 1524 case IEEE80211_ELEMID_MESHPEER: 1525 meshpeer = frm; 1526 mpie = (const struct ieee80211_meshpeer_ie *) frm; 1527 memset(mp, 0, sizeof(*mp)); 1528 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 1529 /* NB: peer link ID is optional on these frames */ 1530 if (subtype == IEEE80211_MESH_PEER_LINK_CLOSE && 1531 mpie->peer_len == 8) { 1532 mp->peer_linkid = 0; 1533 mp->peer_rcode = LE_READ_2(&mpie->peer_linkid); 1534 } else { 1535 mp->peer_linkid = LE_READ_2(&mpie->peer_linkid); 1536 mp->peer_rcode = LE_READ_2(&mpie->peer_rcode); 1537 } 1538 break; 1539 } 1540 frm += frm[1] + 2; 1541 } 1542 1543 /* 1544 * Verify the contents of the frame. Action frames with 1545 * close subtype don't have a Mesh Configuration IE. 1546 * If if fails validation, close the peer link. 1547 */ 1548 KASSERT(meshpeer != NULL && 1549 subtype != IEEE80211_ACTION_MESHPEERING_CLOSE, 1550 ("parsing close action")); 1551 1552 if (mesh_verify_meshid(vap, meshid) || 1553 mesh_verify_meshpeer(vap, subtype, meshpeer) || 1554 mesh_verify_meshconf(vap, meshconf)) { 1555 uint16_t args[3]; 1556 1557 IEEE80211_DISCARD(vap, 1558 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1559 wh, NULL, "%s", "not for our mesh"); 1560 vap->iv_stats.is_rx_mgtdiscard++; 1561 switch (ni->ni_mlstate) { 1562 case IEEE80211_NODE_MESH_IDLE: 1563 case IEEE80211_NODE_MESH_ESTABLISHED: 1564 case IEEE80211_NODE_MESH_HOLDING: 1565 /* ignore */ 1566 break; 1567 case IEEE80211_NODE_MESH_OPENSNT: 1568 case IEEE80211_NODE_MESH_OPENRCV: 1569 case IEEE80211_NODE_MESH_CONFIRMRCV: 1570 args[0] = ni->ni_mlpid; 1571 args[1] = ni->ni_mllid; 1572 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1573 ieee80211_send_action(ni, 1574 IEEE80211_ACTION_CAT_MESHPEERING, 1575 IEEE80211_ACTION_MESHPEERING_CLOSE, 1576 args); 1577 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1578 mesh_peer_timeout_setup(ni); 1579 break; 1580 } 1581 return NULL; 1582 } 1583 return (const struct ieee80211_meshpeer_ie *) mp; 1584 } 1585 1586 static int 1587 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 1588 const struct ieee80211_frame *wh, 1589 const uint8_t *frm, const uint8_t *efrm) 1590 { 1591 struct ieee80211vap *vap = ni->ni_vap; 1592 struct ieee80211_meshpeer_ie ie; 1593 const struct ieee80211_meshpeer_ie *meshpeer; 1594 uint16_t args[3]; 1595 1596 /* +2+2 for action + code + capabilites */ 1597 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 1598 IEEE80211_ACTION_MESHPEERING_OPEN); 1599 if (meshpeer == NULL) { 1600 return 0; 1601 } 1602 1603 /* XXX move up */ 1604 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1605 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 1606 1607 switch (ni->ni_mlstate) { 1608 case IEEE80211_NODE_MESH_IDLE: 1609 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 1610 ni->ni_mllid = meshpeer->peer_llinkid; 1611 ni->ni_mlpid = mesh_generateid(vap); 1612 if (ni->ni_mlpid == 0) 1613 return 0; /* XXX */ 1614 args[0] = ni->ni_mlpid; 1615 /* Announce we're open too... */ 1616 ieee80211_send_action(ni, 1617 IEEE80211_ACTION_CAT_MESHPEERING, 1618 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1619 /* ...and confirm the link. */ 1620 args[0] = ni->ni_mlpid; 1621 args[1] = ni->ni_mllid; 1622 ieee80211_send_action(ni, 1623 IEEE80211_ACTION_CAT_MESHPEERING, 1624 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1625 args); 1626 mesh_peer_timeout_setup(ni); 1627 break; 1628 case IEEE80211_NODE_MESH_OPENRCV: 1629 /* Wrong Link ID */ 1630 if (ni->ni_mllid != meshpeer->peer_llinkid) { 1631 args[0] = ni->ni_mllid; 1632 args[1] = ni->ni_mlpid; 1633 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1634 ieee80211_send_action(ni, 1635 IEEE80211_ACTION_CAT_MESHPEERING, 1636 IEEE80211_ACTION_MESHPEERING_CLOSE, 1637 args); 1638 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1639 mesh_peer_timeout_setup(ni); 1640 break; 1641 } 1642 /* Duplicate open, confirm again. */ 1643 args[0] = ni->ni_mlpid; 1644 args[1] = ni->ni_mllid; 1645 ieee80211_send_action(ni, 1646 IEEE80211_ACTION_CAT_MESHPEERING, 1647 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1648 args); 1649 break; 1650 case IEEE80211_NODE_MESH_OPENSNT: 1651 ni->ni_mllid = meshpeer->peer_llinkid; 1652 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 1653 args[0] = ni->ni_mlpid; 1654 args[1] = ni->ni_mllid; 1655 ieee80211_send_action(ni, 1656 IEEE80211_ACTION_CAT_MESHPEERING, 1657 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1658 args); 1659 /* NB: don't setup/clear any timeout */ 1660 break; 1661 case IEEE80211_NODE_MESH_CONFIRMRCV: 1662 if (ni->ni_mlpid != meshpeer->peer_linkid || 1663 ni->ni_mllid != meshpeer->peer_llinkid) { 1664 args[0] = ni->ni_mlpid; 1665 args[1] = ni->ni_mllid; 1666 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1667 ieee80211_send_action(ni, 1668 IEEE80211_ACTION_CAT_MESHPEERING, 1669 IEEE80211_ACTION_MESHPEERING_CLOSE, 1670 args); 1671 mesh_linkchange(ni, 1672 IEEE80211_NODE_MESH_HOLDING); 1673 mesh_peer_timeout_setup(ni); 1674 break; 1675 } 1676 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 1677 ni->ni_mllid = meshpeer->peer_llinkid; 1678 args[0] = ni->ni_mlpid; 1679 args[1] = ni->ni_mllid; 1680 ieee80211_send_action(ni, 1681 IEEE80211_ACTION_CAT_MESHPEERING, 1682 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1683 args); 1684 mesh_peer_timeout_stop(ni); 1685 break; 1686 case IEEE80211_NODE_MESH_ESTABLISHED: 1687 if (ni->ni_mllid != meshpeer->peer_llinkid) { 1688 args[0] = ni->ni_mllid; 1689 args[1] = ni->ni_mlpid; 1690 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1691 ieee80211_send_action(ni, 1692 IEEE80211_ACTION_CAT_MESHPEERING, 1693 IEEE80211_ACTION_MESHPEERING_CLOSE, 1694 args); 1695 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1696 mesh_peer_timeout_setup(ni); 1697 break; 1698 } 1699 args[0] = ni->ni_mlpid; 1700 args[1] = ni->ni_mllid; 1701 ieee80211_send_action(ni, 1702 IEEE80211_ACTION_CAT_MESHPEERING, 1703 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1704 args); 1705 break; 1706 case IEEE80211_NODE_MESH_HOLDING: 1707 args[0] = ni->ni_mlpid; 1708 args[1] = meshpeer->peer_llinkid; 1709 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 1710 ieee80211_send_action(ni, 1711 IEEE80211_ACTION_CAT_MESHPEERING, 1712 IEEE80211_ACTION_MESHPEERING_CLOSE, 1713 args); 1714 break; 1715 } 1716 return 0; 1717 } 1718 1719 static int 1720 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 1721 const struct ieee80211_frame *wh, 1722 const uint8_t *frm, const uint8_t *efrm) 1723 { 1724 struct ieee80211vap *vap = ni->ni_vap; 1725 struct ieee80211_meshpeer_ie ie; 1726 const struct ieee80211_meshpeer_ie *meshpeer; 1727 uint16_t args[3]; 1728 1729 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 1730 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 1731 IEEE80211_ACTION_MESHPEERING_CONFIRM); 1732 if (meshpeer == NULL) { 1733 return 0; 1734 } 1735 1736 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1737 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 1738 meshpeer->peer_llinkid, meshpeer->peer_linkid); 1739 1740 switch (ni->ni_mlstate) { 1741 case IEEE80211_NODE_MESH_OPENRCV: 1742 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 1743 mesh_peer_timeout_stop(ni); 1744 break; 1745 case IEEE80211_NODE_MESH_OPENSNT: 1746 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 1747 break; 1748 case IEEE80211_NODE_MESH_HOLDING: 1749 args[0] = ni->ni_mlpid; 1750 args[1] = meshpeer->peer_llinkid; 1751 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 1752 ieee80211_send_action(ni, 1753 IEEE80211_ACTION_CAT_MESHPEERING, 1754 IEEE80211_ACTION_MESHPEERING_CLOSE, 1755 args); 1756 break; 1757 case IEEE80211_NODE_MESH_CONFIRMRCV: 1758 if (ni->ni_mllid != meshpeer->peer_llinkid) { 1759 args[0] = ni->ni_mlpid; 1760 args[1] = ni->ni_mllid; 1761 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1762 ieee80211_send_action(ni, 1763 IEEE80211_ACTION_CAT_MESHPEERING, 1764 IEEE80211_ACTION_MESHPEERING_CLOSE, 1765 args); 1766 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1767 mesh_peer_timeout_setup(ni); 1768 } 1769 break; 1770 default: 1771 IEEE80211_DISCARD(vap, 1772 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1773 wh, NULL, "received confirm in invalid state %d", 1774 ni->ni_mlstate); 1775 vap->iv_stats.is_rx_mgtdiscard++; 1776 break; 1777 } 1778 return 0; 1779 } 1780 1781 static int 1782 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 1783 const struct ieee80211_frame *wh, 1784 const uint8_t *frm, const uint8_t *efrm) 1785 { 1786 uint16_t args[3]; 1787 1788 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1789 ni, "%s", "recv PEER CLOSE"); 1790 1791 switch (ni->ni_mlstate) { 1792 case IEEE80211_NODE_MESH_IDLE: 1793 /* ignore */ 1794 break; 1795 case IEEE80211_NODE_MESH_OPENRCV: 1796 case IEEE80211_NODE_MESH_OPENSNT: 1797 case IEEE80211_NODE_MESH_CONFIRMRCV: 1798 case IEEE80211_NODE_MESH_ESTABLISHED: 1799 args[0] = ni->ni_mlpid; 1800 args[1] = ni->ni_mllid; 1801 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 1802 ieee80211_send_action(ni, 1803 IEEE80211_ACTION_CAT_MESHPEERING, 1804 IEEE80211_ACTION_MESHPEERING_CLOSE, 1805 args); 1806 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1807 mesh_peer_timeout_setup(ni); 1808 break; 1809 case IEEE80211_NODE_MESH_HOLDING: 1810 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 1811 mesh_peer_timeout_setup(ni); 1812 break; 1813 } 1814 return 0; 1815 } 1816 1817 /* 1818 * Link Metric handling. 1819 */ 1820 static int 1821 mesh_recv_action_meshlmetric_req(struct ieee80211_node *ni, 1822 const struct ieee80211_frame *wh, 1823 const uint8_t *frm, const uint8_t *efrm) 1824 { 1825 uint32_t metric; 1826 1827 metric = mesh_airtime_calc(ni); 1828 ieee80211_send_action(ni, 1829 IEEE80211_ACTION_CAT_MESHLMETRIC, 1830 IEEE80211_ACTION_MESHLMETRIC_REP, 1831 &metric); 1832 return 0; 1833 } 1834 1835 static int 1836 mesh_recv_action_meshlmetric_rep(struct ieee80211_node *ni, 1837 const struct ieee80211_frame *wh, 1838 const uint8_t *frm, const uint8_t *efrm) 1839 { 1840 return 0; 1841 } 1842 1843 static int 1844 mesh_send_action(struct ieee80211_node *ni, struct mbuf *m) 1845 { 1846 struct ieee80211_bpf_params params; 1847 1848 memset(¶ms, 0, sizeof(params)); 1849 params.ibp_pri = WME_AC_VO; 1850 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 1851 /* XXX ucast/mcast */ 1852 params.ibp_try0 = ni->ni_txparms->maxretry; 1853 params.ibp_power = ni->ni_txpower; 1854 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION, 1855 ¶ms); 1856 } 1857 1858 #define ADDSHORT(frm, v) do { \ 1859 frm[0] = (v) & 0xff; \ 1860 frm[1] = (v) >> 8; \ 1861 frm += 2; \ 1862 } while (0) 1863 #define ADDWORD(frm, v) do { \ 1864 frm[0] = (v) & 0xff; \ 1865 frm[1] = ((v) >> 8) & 0xff; \ 1866 frm[2] = ((v) >> 16) & 0xff; \ 1867 frm[3] = ((v) >> 24) & 0xff; \ 1868 frm += 4; \ 1869 } while (0) 1870 1871 static int 1872 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 1873 int category, int action, void *args0) 1874 { 1875 struct ieee80211vap *vap = ni->ni_vap; 1876 struct ieee80211com *ic = ni->ni_ic; 1877 uint16_t *args = args0; 1878 const struct ieee80211_rateset *rs; 1879 struct mbuf *m; 1880 uint8_t *frm; 1881 1882 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1883 "send PEER OPEN action: localid 0x%x", args[0]); 1884 1885 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1886 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 1887 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 1888 ieee80211_ref_node(ni); 1889 1890 m = ieee80211_getmgtframe(&frm, 1891 ic->ic_headroom + sizeof(struct ieee80211_frame), 1892 sizeof(uint16_t) /* action+category */ 1893 + sizeof(uint16_t) /* capabilites */ 1894 + 2 + IEEE80211_RATE_SIZE 1895 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1896 + 2 + IEEE80211_MESHID_LEN 1897 + sizeof(struct ieee80211_meshconf_ie) 1898 + sizeof(struct ieee80211_meshpeer_ie) 1899 ); 1900 if (m != NULL) { 1901 /* 1902 * mesh peer open action frame format: 1903 * [1] category 1904 * [1] action 1905 * [2] capabilities 1906 * [tlv] rates 1907 * [tlv] xrates 1908 * [tlv] mesh id 1909 * [tlv] mesh conf 1910 * [tlv] mesh peer link mgmt 1911 */ 1912 *frm++ = category; 1913 *frm++ = action; 1914 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 1915 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 1916 frm = ieee80211_add_rates(frm, rs); 1917 frm = ieee80211_add_xrates(frm, rs); 1918 frm = ieee80211_add_meshid(frm, vap); 1919 frm = ieee80211_add_meshconf(frm, vap); 1920 frm = ieee80211_add_meshpeer(frm, IEEE80211_MESH_PEER_LINK_OPEN, 1921 args[0], 0, 0); 1922 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1923 return mesh_send_action(ni, m); 1924 } else { 1925 vap->iv_stats.is_tx_nobuf++; 1926 ieee80211_free_node(ni); 1927 return ENOMEM; 1928 } 1929 } 1930 1931 static int 1932 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 1933 int category, int action, void *args0) 1934 { 1935 struct ieee80211vap *vap = ni->ni_vap; 1936 struct ieee80211com *ic = ni->ni_ic; 1937 uint16_t *args = args0; 1938 const struct ieee80211_rateset *rs; 1939 struct mbuf *m; 1940 uint8_t *frm; 1941 1942 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1943 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 1944 args[0], args[1]); 1945 1946 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1947 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 1948 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 1949 ieee80211_ref_node(ni); 1950 1951 m = ieee80211_getmgtframe(&frm, 1952 ic->ic_headroom + sizeof(struct ieee80211_frame), 1953 sizeof(uint16_t) /* action+category */ 1954 + sizeof(uint16_t) /* capabilites */ 1955 + sizeof(uint16_t) /* status code */ 1956 + sizeof(uint16_t) /* AID */ 1957 + 2 + IEEE80211_RATE_SIZE 1958 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1959 + 2 + IEEE80211_MESHID_LEN 1960 + sizeof(struct ieee80211_meshconf_ie) 1961 + sizeof(struct ieee80211_meshpeer_ie) 1962 ); 1963 if (m != NULL) { 1964 /* 1965 * mesh peer confirm action frame format: 1966 * [1] category 1967 * [1] action 1968 * [2] capabilities 1969 * [2] status code 1970 * [2] association id (peer ID) 1971 * [tlv] rates 1972 * [tlv] xrates 1973 * [tlv] mesh id 1974 * [tlv] mesh conf 1975 * [tlv] mesh peer link mgmt 1976 */ 1977 *frm++ = category; 1978 *frm++ = action; 1979 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 1980 ADDSHORT(frm, 0); /* status code */ 1981 ADDSHORT(frm, args[1]); /* AID */ 1982 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 1983 frm = ieee80211_add_rates(frm, rs); 1984 frm = ieee80211_add_xrates(frm, rs); 1985 frm = ieee80211_add_meshid(frm, vap); 1986 frm = ieee80211_add_meshconf(frm, vap); 1987 frm = ieee80211_add_meshpeer(frm, 1988 IEEE80211_MESH_PEER_LINK_CONFIRM, 1989 args[0], args[1], 0); 1990 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1991 return mesh_send_action(ni, m); 1992 } else { 1993 vap->iv_stats.is_tx_nobuf++; 1994 ieee80211_free_node(ni); 1995 return ENOMEM; 1996 } 1997 } 1998 1999 static int 2000 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2001 int category, int action, void *args0) 2002 { 2003 struct ieee80211vap *vap = ni->ni_vap; 2004 struct ieee80211com *ic = ni->ni_ic; 2005 uint16_t *args = args0; 2006 struct mbuf *m; 2007 uint8_t *frm; 2008 2009 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2010 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2011 args[0], args[1], args[2]); 2012 2013 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2014 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 2015 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 2016 ieee80211_ref_node(ni); 2017 2018 m = ieee80211_getmgtframe(&frm, 2019 ic->ic_headroom + sizeof(struct ieee80211_frame), 2020 sizeof(uint16_t) /* action+category */ 2021 + sizeof(uint16_t) /* reason code */ 2022 + 2 + IEEE80211_MESHID_LEN 2023 + sizeof(struct ieee80211_meshpeer_ie) 2024 ); 2025 if (m != NULL) { 2026 /* 2027 * mesh peer close action frame format: 2028 * [1] category 2029 * [1] action 2030 * [2] reason code 2031 * [tlv] mesh id 2032 * [tlv] mesh peer link mgmt 2033 */ 2034 *frm++ = category; 2035 *frm++ = action; 2036 ADDSHORT(frm, args[2]); /* reason code */ 2037 frm = ieee80211_add_meshid(frm, vap); 2038 frm = ieee80211_add_meshpeer(frm, 2039 IEEE80211_MESH_PEER_LINK_CLOSE, 2040 args[0], args[1], args[2]); 2041 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2042 return mesh_send_action(ni, m); 2043 } else { 2044 vap->iv_stats.is_tx_nobuf++; 2045 ieee80211_free_node(ni); 2046 return ENOMEM; 2047 } 2048 } 2049 2050 static int 2051 mesh_send_action_meshlink_request(struct ieee80211_node *ni, 2052 int category, int action, void *arg0) 2053 { 2054 struct ieee80211vap *vap = ni->ni_vap; 2055 struct ieee80211com *ic = ni->ni_ic; 2056 struct mbuf *m; 2057 uint8_t *frm; 2058 2059 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2060 "%s", "send LINK METRIC REQUEST action"); 2061 2062 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2063 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 2064 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 2065 ieee80211_ref_node(ni); 2066 2067 m = ieee80211_getmgtframe(&frm, 2068 ic->ic_headroom + sizeof(struct ieee80211_frame), 2069 sizeof(uint16_t) /* action+category */ 2070 ); 2071 if (m != NULL) { 2072 /* 2073 * mesh link metric request 2074 * [1] category 2075 * [1] action 2076 */ 2077 *frm++ = category; 2078 *frm++ = action; 2079 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2080 return mesh_send_action(ni, m); 2081 } else { 2082 vap->iv_stats.is_tx_nobuf++; 2083 ieee80211_free_node(ni); 2084 return ENOMEM; 2085 } 2086 } 2087 2088 static int 2089 mesh_send_action_meshlink_reply(struct ieee80211_node *ni, 2090 int category, int action, void *args0) 2091 { 2092 struct ieee80211vap *vap = ni->ni_vap; 2093 struct ieee80211com *ic = ni->ni_ic; 2094 uint32_t *metric = args0; 2095 struct mbuf *m; 2096 uint8_t *frm; 2097 2098 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2099 "send LINK METRIC REPLY action: metric 0x%x", *metric); 2100 2101 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2102 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 2103 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 2104 ieee80211_ref_node(ni); 2105 2106 m = ieee80211_getmgtframe(&frm, 2107 ic->ic_headroom + sizeof(struct ieee80211_frame), 2108 sizeof(uint16_t) /* action+category */ 2109 + sizeof(struct ieee80211_meshlmetric_ie) 2110 ); 2111 if (m != NULL) { 2112 /* 2113 * mesh link metric reply 2114 * [1] category 2115 * [1] action 2116 * [tlv] mesh link metric 2117 */ 2118 *frm++ = category; 2119 *frm++ = action; 2120 frm = ieee80211_add_meshlmetric(frm, *metric); 2121 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2122 return mesh_send_action(ni, m); 2123 } else { 2124 vap->iv_stats.is_tx_nobuf++; 2125 ieee80211_free_node(ni); 2126 return ENOMEM; 2127 } 2128 } 2129 2130 static void 2131 mesh_peer_timeout_setup(struct ieee80211_node *ni) 2132 { 2133 switch (ni->ni_mlstate) { 2134 case IEEE80211_NODE_MESH_HOLDING: 2135 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 2136 break; 2137 case IEEE80211_NODE_MESH_CONFIRMRCV: 2138 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 2139 break; 2140 case IEEE80211_NODE_MESH_IDLE: 2141 ni->ni_mltval = 0; 2142 break; 2143 default: 2144 ni->ni_mltval = ieee80211_mesh_retrytimeout; 2145 break; 2146 } 2147 if (ni->ni_mltval) { 2148 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2149 mesh_peer_timeout_callout, ni); 2150 } 2151 } 2152 2153 /* 2154 * Same as above but backoffs timer statisically 50%. 2155 */ 2156 static void 2157 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 2158 { 2159 uint32_t r; 2160 2161 r = karc4random(); 2162 ni->ni_mltval += r % ni->ni_mltval; 2163 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2164 mesh_peer_timeout_callout, ni); 2165 } 2166 2167 static __inline void 2168 mesh_peer_timeout_stop(struct ieee80211_node *ni) 2169 { 2170 callout_stop(&ni->ni_mltimer); 2171 } 2172 2173 /* 2174 * Mesh Peer Link Management FSM timeout handling. 2175 */ 2176 static void 2177 mesh_peer_timeout_callout(void *arg) 2178 { 2179 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 2180 uint16_t args[3]; 2181 2182 wlan_serialize_enter(); 2183 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 2184 ni, "mesh link timeout, state %d, retry counter %d", 2185 ni->ni_mlstate, ni->ni_mlrcnt); 2186 2187 switch (ni->ni_mlstate) { 2188 case IEEE80211_NODE_MESH_IDLE: 2189 case IEEE80211_NODE_MESH_ESTABLISHED: 2190 break; 2191 case IEEE80211_NODE_MESH_OPENSNT: 2192 case IEEE80211_NODE_MESH_OPENRCV: 2193 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 2194 args[0] = ni->ni_mlpid; 2195 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 2196 ieee80211_send_action(ni, 2197 IEEE80211_ACTION_CAT_MESHPEERING, 2198 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2199 ni->ni_mlrcnt = 0; 2200 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2201 mesh_peer_timeout_setup(ni); 2202 } else { 2203 args[0] = ni->ni_mlpid; 2204 ieee80211_send_action(ni, 2205 IEEE80211_ACTION_CAT_MESHPEERING, 2206 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2207 ni->ni_mlrcnt++; 2208 mesh_peer_timeout_backoff(ni); 2209 } 2210 break; 2211 case IEEE80211_NODE_MESH_CONFIRMRCV: 2212 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 2213 args[0] = ni->ni_mlpid; 2214 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 2215 ieee80211_send_action(ni, 2216 IEEE80211_ACTION_CAT_MESHPEERING, 2217 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2218 ni->ni_mlrcnt = 0; 2219 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2220 mesh_peer_timeout_setup(ni); 2221 } else { 2222 ni->ni_mlrcnt++; 2223 mesh_peer_timeout_setup(ni); 2224 } 2225 break; 2226 case IEEE80211_NODE_MESH_HOLDING: 2227 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2228 break; 2229 } 2230 wlan_serialize_exit(); 2231 } 2232 2233 static int 2234 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 2235 { 2236 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2237 2238 if (ie == NULL || ie[1] != ms->ms_idlen) 2239 return 1; 2240 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 2241 } 2242 2243 /* 2244 * Check if we are using the same algorithms for this mesh. 2245 */ 2246 static int 2247 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 2248 { 2249 const struct ieee80211_meshconf_ie *meshconf = 2250 (const struct ieee80211_meshconf_ie *) ie; 2251 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 2252 uint16_t cap; 2253 2254 if (meshconf == NULL) 2255 return 1; 2256 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 2257 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2258 "unknown path selection algorithm: 0x%x\n", 2259 meshconf->conf_pselid); 2260 return 1; 2261 } 2262 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 2263 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2264 "unknown path metric algorithm: 0x%x\n", 2265 meshconf->conf_pmetid); 2266 return 1; 2267 } 2268 if (meshconf->conf_ccid != 0) { 2269 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2270 "unknown congestion control algorithm: 0x%x\n", 2271 meshconf->conf_ccid); 2272 return 1; 2273 } 2274 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 2275 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2276 "unknown sync algorithm: 0x%x\n", 2277 meshconf->conf_syncid); 2278 return 1; 2279 } 2280 if (meshconf->conf_authid != 0) { 2281 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2282 "unknown auth algorithm: 0x%x\n", 2283 meshconf->conf_pselid); 2284 return 1; 2285 } 2286 /* NB: conf_cap is only read correctly here */ 2287 cap = LE_READ_2(&meshconf->conf_cap); 2288 /* Not accepting peers */ 2289 if (!(cap & IEEE80211_MESHCONF_CAP_AP)) { 2290 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2291 "not accepting peers: 0x%x\n", meshconf->conf_cap); 2292 return 1; 2293 } 2294 return 0; 2295 } 2296 2297 static int 2298 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 2299 const uint8_t *ie) 2300 { 2301 const struct ieee80211_meshpeer_ie *meshpeer = 2302 (const struct ieee80211_meshpeer_ie *) ie; 2303 2304 if (meshpeer == NULL || meshpeer->peer_len < 6 || 2305 meshpeer->peer_len > 10) 2306 return 1; 2307 switch (subtype) { 2308 case IEEE80211_MESH_PEER_LINK_OPEN: 2309 if (meshpeer->peer_len != 6) 2310 return 1; 2311 break; 2312 case IEEE80211_MESH_PEER_LINK_CONFIRM: 2313 if (meshpeer->peer_len != 8) 2314 return 1; 2315 break; 2316 case IEEE80211_MESH_PEER_LINK_CLOSE: 2317 if (meshpeer->peer_len < 8) 2318 return 1; 2319 if (meshpeer->peer_len == 8 && meshpeer->peer_linkid != 0) 2320 return 1; 2321 if (meshpeer->peer_rcode == 0) 2322 return 1; 2323 break; 2324 } 2325 return 0; 2326 } 2327 2328 /* 2329 * Add a Mesh ID IE to a frame. 2330 */ 2331 uint8_t * 2332 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 2333 { 2334 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2335 2336 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 2337 2338 *frm++ = IEEE80211_ELEMID_MESHID; 2339 *frm++ = ms->ms_idlen; 2340 memcpy(frm, ms->ms_id, ms->ms_idlen); 2341 return frm + ms->ms_idlen; 2342 } 2343 2344 /* 2345 * Add a Mesh Configuration IE to a frame. 2346 * For now just use HWMP routing, Airtime link metric, Null Congestion 2347 * Signaling, Null Sync Protocol and Null Authentication. 2348 */ 2349 uint8_t * 2350 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 2351 { 2352 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 2353 uint16_t caps; 2354 2355 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 2356 2357 *frm++ = IEEE80211_ELEMID_MESHCONF; 2358 *frm++ = sizeof(struct ieee80211_meshconf_ie) - 2; 2359 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 2360 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 2361 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 2362 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 2363 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 2364 /* NB: set the number of neighbors before the rest */ 2365 *frm = (ms->ms_neighbors > 15 ? 15 : ms->ms_neighbors) << 1; 2366 if (ms->ms_flags & IEEE80211_MESHFLAGS_PORTAL) 2367 *frm |= IEEE80211_MESHCONF_FORM_MP; 2368 frm += 1; 2369 caps = 0; 2370 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 2371 caps |= IEEE80211_MESHCONF_CAP_AP; 2372 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 2373 caps |= IEEE80211_MESHCONF_CAP_FWRD; 2374 ADDSHORT(frm, caps); 2375 return frm; 2376 } 2377 2378 /* 2379 * Add a Mesh Peer Management IE to a frame. 2380 */ 2381 uint8_t * 2382 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 2383 uint16_t peerid, uint16_t reason) 2384 { 2385 /* XXX change for AH */ 2386 static const uint8_t meshpeerproto[4] = IEEE80211_MESH_PEER_PROTO; 2387 2388 KASSERT(localid != 0, ("localid == 0")); 2389 2390 *frm++ = IEEE80211_ELEMID_MESHPEER; 2391 switch (subtype) { 2392 case IEEE80211_MESH_PEER_LINK_OPEN: 2393 *frm++ = 6; /* length */ 2394 memcpy(frm, meshpeerproto, 4); 2395 frm += 4; 2396 ADDSHORT(frm, localid); /* local ID */ 2397 break; 2398 case IEEE80211_MESH_PEER_LINK_CONFIRM: 2399 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 2400 *frm++ = 8; /* length */ 2401 memcpy(frm, meshpeerproto, 4); 2402 frm += 4; 2403 ADDSHORT(frm, localid); /* local ID */ 2404 ADDSHORT(frm, peerid); /* peer ID */ 2405 break; 2406 case IEEE80211_MESH_PEER_LINK_CLOSE: 2407 if (peerid) 2408 *frm++ = 10; /* length */ 2409 else 2410 *frm++ = 8; /* length */ 2411 memcpy(frm, meshpeerproto, 4); 2412 frm += 4; 2413 ADDSHORT(frm, localid); /* local ID */ 2414 if (peerid) 2415 ADDSHORT(frm, peerid); /* peer ID */ 2416 ADDSHORT(frm, reason); 2417 break; 2418 } 2419 return frm; 2420 } 2421 2422 /* 2423 * Compute an Airtime Link Metric for the link with this node. 2424 * 2425 * Based on Draft 3.0 spec (11B.10, p.149). 2426 */ 2427 /* 2428 * Max 802.11s overhead. 2429 */ 2430 #define IEEE80211_MESH_MAXOVERHEAD \ 2431 (sizeof(struct ieee80211_qosframe_addr4) \ 2432 + sizeof(struct ieee80211_meshcntl_ae11) \ 2433 + sizeof(struct llc) \ 2434 + IEEE80211_ADDR_LEN \ 2435 + IEEE80211_WEP_IVLEN \ 2436 + IEEE80211_WEP_KIDLEN \ 2437 + IEEE80211_WEP_CRCLEN \ 2438 + IEEE80211_WEP_MICLEN \ 2439 + IEEE80211_CRC_LEN) 2440 uint32_t 2441 mesh_airtime_calc(struct ieee80211_node *ni) 2442 { 2443 #define M_BITS 8 2444 #define S_FACTOR (2 * M_BITS) 2445 struct ieee80211com *ic = ni->ni_ic; 2446 struct ifnet *ifp = ni->ni_vap->iv_ifp; 2447 static const int nbits = 8192 << M_BITS; 2448 uint32_t overhead, rate, errrate; 2449 uint64_t res; 2450 2451 /* Time to transmit a frame */ 2452 rate = ni->ni_txrate; 2453 overhead = ieee80211_compute_duration(ic->ic_rt, 2454 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 2455 /* Error rate in percentage */ 2456 /* XXX assuming small failures are ok */ 2457 errrate = (((ifp->if_oerrors + 2458 ifp->if_ierrors) / 100) << M_BITS) / 100; 2459 res = (overhead + (nbits / rate)) * 2460 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 2461 2462 return (uint32_t)(res >> S_FACTOR); 2463 #undef M_BITS 2464 #undef S_FACTOR 2465 } 2466 2467 /* 2468 * Add a Mesh Link Metric report IE to a frame. 2469 */ 2470 uint8_t * 2471 ieee80211_add_meshlmetric(uint8_t *frm, uint32_t metric) 2472 { 2473 *frm++ = IEEE80211_ELEMID_MESHLINK; 2474 *frm++ = 4; 2475 ADDWORD(frm, metric); 2476 return frm; 2477 } 2478 #undef ADDSHORT 2479 #undef ADDWORD 2480 2481 /* 2482 * Initialize any mesh-specific node state. 2483 */ 2484 void 2485 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 2486 { 2487 ni->ni_flags |= IEEE80211_NODE_QOS; 2488 callout_init_mp(&ni->ni_mltimer); 2489 } 2490 2491 /* 2492 * Cleanup any mesh-specific node state. 2493 */ 2494 void 2495 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 2496 { 2497 struct ieee80211vap *vap = ni->ni_vap; 2498 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2499 2500 callout_stop(&ni->ni_mltimer); 2501 /* NB: short-circuit callbacks after mesh_vdetach */ 2502 if (vap->iv_mesh != NULL) 2503 ms->ms_ppath->mpp_peerdown(ni); 2504 } 2505 2506 void 2507 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 2508 { 2509 ni->ni_meshidlen = ie[1]; 2510 memcpy(ni->ni_meshid, ie + 2, ie[1]); 2511 } 2512 2513 /* 2514 * Setup mesh-specific node state on neighbor discovery. 2515 */ 2516 void 2517 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 2518 const struct ieee80211_frame *wh, 2519 const struct ieee80211_scanparams *sp) 2520 { 2521 ieee80211_parse_meshid(ni, sp->meshid); 2522 } 2523 2524 void 2525 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 2526 struct ieee80211_beacon_offsets *bo) 2527 { 2528 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 2529 2530 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 2531 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 2532 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 2533 } 2534 } 2535 2536 static int 2537 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 2538 { 2539 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2540 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 2541 struct ieee80211_mesh_route *rt; 2542 struct ieee80211req_mesh_route *imr; 2543 size_t len, off; 2544 uint8_t *p; 2545 int error; 2546 2547 if (vap->iv_opmode != IEEE80211_M_MBSS) 2548 return ENOSYS; 2549 2550 error = 0; 2551 switch (ireq->i_type) { 2552 case IEEE80211_IOC_MESH_ID: 2553 ireq->i_len = ms->ms_idlen; 2554 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 2555 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 2556 break; 2557 case IEEE80211_IOC_MESH_AP: 2558 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 2559 break; 2560 case IEEE80211_IOC_MESH_FWRD: 2561 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 2562 break; 2563 case IEEE80211_IOC_MESH_TTL: 2564 ireq->i_val = ms->ms_ttl; 2565 break; 2566 case IEEE80211_IOC_MESH_RTCMD: 2567 switch (ireq->i_val) { 2568 case IEEE80211_MESH_RTCMD_LIST: 2569 len = 0; 2570 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 2571 len += sizeof(*imr); 2572 } 2573 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 2574 ireq->i_len = len; 2575 return ENOMEM; 2576 } 2577 ireq->i_len = len; 2578 /* XXX M_WAIT? */ 2579 p = kmalloc(len, M_TEMP, M_INTWAIT | M_ZERO); 2580 off = 0; 2581 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 2582 if (off >= len) 2583 break; 2584 imr = (struct ieee80211req_mesh_route *) 2585 (p + off); 2586 imr->imr_flags = rt->rt_flags; 2587 IEEE80211_ADDR_COPY(imr->imr_dest, 2588 rt->rt_dest); 2589 IEEE80211_ADDR_COPY(imr->imr_nexthop, 2590 rt->rt_nexthop); 2591 imr->imr_metric = rt->rt_metric; 2592 imr->imr_nhops = rt->rt_nhops; 2593 imr->imr_lifetime = rt->rt_lifetime; 2594 imr->imr_lastmseq = rt->rt_lastmseq; 2595 off += sizeof(*imr); 2596 } 2597 error = copyout(p, (uint8_t *)ireq->i_data, 2598 ireq->i_len); 2599 kfree(p, M_TEMP); 2600 break; 2601 case IEEE80211_MESH_RTCMD_FLUSH: 2602 case IEEE80211_MESH_RTCMD_ADD: 2603 case IEEE80211_MESH_RTCMD_DELETE: 2604 return EINVAL; 2605 default: 2606 return ENOSYS; 2607 } 2608 break; 2609 case IEEE80211_IOC_MESH_PR_METRIC: 2610 len = strlen(ms->ms_pmetric->mpm_descr); 2611 if (ireq->i_len < len) 2612 return EINVAL; 2613 ireq->i_len = len; 2614 error = copyout(ms->ms_pmetric->mpm_descr, 2615 (uint8_t *)ireq->i_data, len); 2616 break; 2617 case IEEE80211_IOC_MESH_PR_PATH: 2618 len = strlen(ms->ms_ppath->mpp_descr); 2619 if (ireq->i_len < len) 2620 return EINVAL; 2621 ireq->i_len = len; 2622 error = copyout(ms->ms_ppath->mpp_descr, 2623 (uint8_t *)ireq->i_data, len); 2624 break; 2625 default: 2626 return ENOSYS; 2627 } 2628 2629 return error; 2630 } 2631 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 2632 2633 static int 2634 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 2635 { 2636 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2637 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 2638 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 2639 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 2640 int error; 2641 2642 if (vap->iv_opmode != IEEE80211_M_MBSS) 2643 return ENOSYS; 2644 2645 error = 0; 2646 switch (ireq->i_type) { 2647 case IEEE80211_IOC_MESH_ID: 2648 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 2649 return EINVAL; 2650 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 2651 if (error != 0) 2652 break; 2653 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 2654 ms->ms_idlen = ireq->i_len; 2655 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 2656 error = ENETRESET; 2657 break; 2658 case IEEE80211_IOC_MESH_AP: 2659 if (ireq->i_val) 2660 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 2661 else 2662 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 2663 error = ENETRESET; 2664 break; 2665 case IEEE80211_IOC_MESH_FWRD: 2666 if (ireq->i_val) 2667 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 2668 else 2669 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 2670 break; 2671 case IEEE80211_IOC_MESH_TTL: 2672 ms->ms_ttl = (uint8_t) ireq->i_val; 2673 break; 2674 case IEEE80211_IOC_MESH_RTCMD: 2675 switch (ireq->i_val) { 2676 case IEEE80211_MESH_RTCMD_LIST: 2677 return EINVAL; 2678 case IEEE80211_MESH_RTCMD_FLUSH: 2679 ieee80211_mesh_rt_flush(vap); 2680 break; 2681 case IEEE80211_MESH_RTCMD_ADD: 2682 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 2683 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 2684 return EINVAL; 2685 error = copyin(ireq->i_data, &tmpaddr, 2686 IEEE80211_ADDR_LEN); 2687 if (error == 0) 2688 ieee80211_mesh_discover(vap, tmpaddr, NULL); 2689 break; 2690 case IEEE80211_MESH_RTCMD_DELETE: 2691 ieee80211_mesh_rt_del(vap, ireq->i_data); 2692 break; 2693 default: 2694 return ENOSYS; 2695 } 2696 break; 2697 case IEEE80211_IOC_MESH_PR_METRIC: 2698 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 2699 if (error == 0) { 2700 error = mesh_select_proto_metric(vap, tmpproto); 2701 if (error == 0) 2702 error = ENETRESET; 2703 } 2704 break; 2705 case IEEE80211_IOC_MESH_PR_PATH: 2706 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 2707 if (error == 0) { 2708 error = mesh_select_proto_path(vap, tmpproto); 2709 if (error == 0) 2710 error = ENETRESET; 2711 } 2712 break; 2713 default: 2714 return ENOSYS; 2715 } 2716 return error; 2717 } 2718 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 2719