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 if (ms == NULL) { 499 kprintf("%s: couldn't alloc MBSS state\n", __func__); 500 return; 501 } 502 vap->iv_mesh = ms; 503 ms->ms_seq = 0; 504 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 505 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 506 TAILQ_INIT(&ms->ms_routes); 507 callout_init_mp(&ms->ms_cleantimer); 508 mesh_select_proto_metric(vap, "AIRTIME"); 509 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 510 mesh_select_proto_path(vap, "HWMP"); 511 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 512 ms->ms_ppath->mpp_vattach(vap); 513 } 514 515 /* 516 * IEEE80211_M_MBSS vap state machine handler. 517 */ 518 static int 519 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 520 { 521 struct ieee80211_mesh_state *ms = vap->iv_mesh; 522 struct ieee80211com *ic = vap->iv_ic; 523 struct ieee80211_node *ni; 524 enum ieee80211_state ostate; 525 526 ostate = vap->iv_state; 527 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 528 __func__, ieee80211_state_name[ostate], 529 ieee80211_state_name[nstate], arg); 530 vap->iv_state = nstate; /* state transition */ 531 if (ostate != IEEE80211_S_SCAN) 532 ieee80211_cancel_scan(vap); /* background scan */ 533 ni = vap->iv_bss; /* NB: no reference held */ 534 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) 535 callout_stop(&ms->ms_cleantimer); 536 switch (nstate) { 537 case IEEE80211_S_INIT: 538 switch (ostate) { 539 case IEEE80211_S_SCAN: 540 ieee80211_cancel_scan(vap); 541 break; 542 case IEEE80211_S_CAC: 543 ieee80211_dfs_cac_stop(vap); 544 break; 545 case IEEE80211_S_RUN: 546 ieee80211_iterate_nodes(&ic->ic_sta, 547 mesh_vdetach_peers, NULL); 548 break; 549 default: 550 break; 551 } 552 if (ostate != IEEE80211_S_INIT) { 553 /* NB: optimize INIT -> INIT case */ 554 ieee80211_reset_bss(vap); 555 ieee80211_mesh_rt_flush(vap); 556 } 557 break; 558 case IEEE80211_S_SCAN: 559 switch (ostate) { 560 case IEEE80211_S_INIT: 561 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 562 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 563 ms->ms_idlen != 0) { 564 /* 565 * Already have a channel and a mesh ID; bypass 566 * the scan and startup immediately. 567 */ 568 ieee80211_create_ibss(vap, vap->iv_des_chan); 569 break; 570 } 571 /* 572 * Initiate a scan. We can come here as a result 573 * of an IEEE80211_IOC_SCAN_REQ too in which case 574 * the vap will be marked with IEEE80211_FEXT_SCANREQ 575 * and the scan request parameters will be present 576 * in iv_scanreq. Otherwise we do the default. 577 */ 578 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 579 ieee80211_check_scan(vap, 580 vap->iv_scanreq_flags, 581 vap->iv_scanreq_duration, 582 vap->iv_scanreq_mindwell, 583 vap->iv_scanreq_maxdwell, 584 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 585 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 586 } else 587 ieee80211_check_scan_current(vap); 588 break; 589 default: 590 break; 591 } 592 break; 593 case IEEE80211_S_CAC: 594 /* 595 * Start CAC on a DFS channel. We come here when starting 596 * a bss on a DFS channel (see ieee80211_create_ibss). 597 */ 598 ieee80211_dfs_cac_start(vap); 599 break; 600 case IEEE80211_S_RUN: 601 switch (ostate) { 602 case IEEE80211_S_INIT: 603 /* 604 * Already have a channel; bypass the 605 * scan and startup immediately. 606 * Note that ieee80211_create_ibss will call 607 * back to do a RUN->RUN state change. 608 */ 609 ieee80211_create_ibss(vap, 610 ieee80211_ht_adjust_channel(ic, 611 ic->ic_curchan, vap->iv_flags_ht)); 612 /* NB: iv_bss is changed on return */ 613 break; 614 case IEEE80211_S_CAC: 615 /* 616 * NB: This is the normal state change when CAC 617 * expires and no radar was detected; no need to 618 * clear the CAC timer as it's already expired. 619 */ 620 /* fall thru... */ 621 case IEEE80211_S_CSA: 622 #if 0 623 /* 624 * Shorten inactivity timer of associated stations 625 * to weed out sta's that don't follow a CSA. 626 */ 627 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 628 #endif 629 /* 630 * Update bss node channel to reflect where 631 * we landed after CSA. 632 */ 633 ieee80211_node_set_chan(vap->iv_bss, 634 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 635 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 636 /* XXX bypass debug msgs */ 637 break; 638 case IEEE80211_S_SCAN: 639 case IEEE80211_S_RUN: 640 #ifdef IEEE80211_DEBUG 641 if (ieee80211_msg_debug(vap)) { 642 struct ieee80211_node *ni = vap->iv_bss; 643 ieee80211_note(vap, 644 "synchronized with %6D meshid ", 645 ni->ni_meshid, ":"); 646 ieee80211_print_essid(ni->ni_meshid, 647 ni->ni_meshidlen); 648 /* XXX MCS/HT */ 649 kprintf(" channel %d\n", 650 ieee80211_chan2ieee(ic, ic->ic_curchan)); 651 } 652 #endif 653 break; 654 default: 655 break; 656 } 657 ieee80211_node_authorize(vap->iv_bss); 658 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 659 mesh_rt_cleanup_callout, vap); 660 break; 661 default: 662 break; 663 } 664 /* NB: ostate not nstate */ 665 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 666 return 0; 667 } 668 669 static void 670 mesh_rt_cleanup_callout(void *arg) 671 { 672 struct ieee80211vap *vap = arg; 673 struct ieee80211_mesh_state *ms = vap->iv_mesh; 674 675 wlan_serialize_enter(); 676 mesh_rt_flush_invalid(vap); 677 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 678 mesh_rt_cleanup_callout, vap); 679 wlan_serialize_exit(); 680 } 681 682 683 /* 684 * Helper function to note the Mesh Peer Link FSM change. 685 */ 686 static void 687 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 688 { 689 struct ieee80211vap *vap = ni->ni_vap; 690 struct ieee80211_mesh_state *ms = vap->iv_mesh; 691 #ifdef IEEE80211_DEBUG 692 static const char *meshlinkstates[] = { 693 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 694 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 695 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 696 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 697 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 698 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 699 }; 700 #endif 701 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 702 ni, "peer link: %s -> %s", 703 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 704 705 /* track neighbor count */ 706 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 707 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 708 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 709 ms->ms_neighbors++; 710 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 711 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 712 state != IEEE80211_NODE_MESH_ESTABLISHED) { 713 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 714 ms->ms_neighbors--; 715 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 716 } 717 ni->ni_mlstate = state; 718 switch (state) { 719 case IEEE80211_NODE_MESH_HOLDING: 720 ms->ms_ppath->mpp_peerdown(ni); 721 break; 722 case IEEE80211_NODE_MESH_ESTABLISHED: 723 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 724 break; 725 default: 726 break; 727 } 728 } 729 730 /* 731 * Helper function to generate a unique local ID required for mesh 732 * peer establishment. 733 */ 734 static void 735 mesh_checkid(void *arg, struct ieee80211_node *ni) 736 { 737 uint16_t *r = arg; 738 739 if (*r == ni->ni_mllid) 740 *(uint16_t *)arg = 0; 741 } 742 743 static uint32_t 744 mesh_generateid(struct ieee80211vap *vap) 745 { 746 int maxiter = 4; 747 uint16_t r; 748 749 do { 750 get_random_bytes(&r, 2); 751 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 752 maxiter--; 753 } while (r == 0 && maxiter > 0); 754 return r; 755 } 756 757 /* 758 * Verifies if we already received this packet by checking its 759 * sequence number. 760 * Returns 0 if the frame is to be accepted, 1 otherwise. 761 */ 762 static int 763 mesh_checkpseq(struct ieee80211vap *vap, 764 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 765 { 766 struct ieee80211_mesh_route *rt; 767 768 rt = ieee80211_mesh_rt_find(vap, source); 769 if (rt == NULL) { 770 rt = ieee80211_mesh_rt_add(vap, source); 771 if (rt == NULL) { 772 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 773 "%s", "add mcast route failed"); 774 vap->iv_stats.is_mesh_rtaddfailed++; 775 return 1; 776 } 777 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 778 "add mcast route, mesh seqno %d", seq); 779 rt->rt_lastmseq = seq; 780 return 0; 781 } 782 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 783 return 1; 784 } else { 785 rt->rt_lastmseq = seq; 786 return 0; 787 } 788 } 789 790 /* 791 * Iterate the routing table and locate the next hop. 792 */ 793 static struct ieee80211_node * 794 mesh_find_txnode(struct ieee80211vap *vap, 795 const uint8_t dest[IEEE80211_ADDR_LEN]) 796 { 797 struct ieee80211_mesh_route *rt; 798 799 rt = ieee80211_mesh_rt_find(vap, dest); 800 if (rt == NULL) 801 return NULL; 802 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 || 803 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) { 804 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 805 "%s: !valid or proxy, flags 0x%x", __func__, rt->rt_flags); 806 /* XXX stat */ 807 return NULL; 808 } 809 return ieee80211_find_txnode(vap, rt->rt_nexthop); 810 } 811 812 /* 813 * Forward the specified frame. 814 * Decrement the TTL and set TA to our MAC address. 815 */ 816 static void 817 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 818 const struct ieee80211_meshcntl *mc) 819 { 820 struct ieee80211com *ic = vap->iv_ic; 821 struct ieee80211_mesh_state *ms = vap->iv_mesh; 822 struct ifnet *ifp = vap->iv_ifp; 823 struct ifnet *parent = ic->ic_ifp; 824 const struct ieee80211_frame *wh = 825 mtod(m, const struct ieee80211_frame *); 826 struct mbuf *mcopy; 827 struct ieee80211_meshcntl *mccopy; 828 struct ieee80211_frame *whcopy; 829 struct ieee80211_node *ni; 830 int err; 831 832 if (mc->mc_ttl == 0) { 833 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 834 "%s", "frame not fwd'd, ttl 0"); 835 vap->iv_stats.is_mesh_fwd_ttl++; 836 return; 837 } 838 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 839 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 840 "%s", "frame not fwd'd, fwding disabled"); 841 vap->iv_stats.is_mesh_fwd_disabled++; 842 return; 843 } 844 mcopy = m_dup(m, MB_DONTWAIT); 845 if (mcopy == NULL) { 846 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 847 "%s", "frame not fwd'd, cannot dup"); 848 vap->iv_stats.is_mesh_fwd_nobuf++; 849 ifp->if_oerrors++; 850 return; 851 } 852 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 853 sizeof(struct ieee80211_meshcntl)); 854 if (mcopy == NULL) { 855 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 856 "%s", "frame not fwd'd, too short"); 857 vap->iv_stats.is_mesh_fwd_tooshort++; 858 ifp->if_oerrors++; 859 m_freem(mcopy); 860 return; 861 } 862 whcopy = mtod(mcopy, struct ieee80211_frame *); 863 mccopy = (struct ieee80211_meshcntl *) 864 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 865 /* XXX clear other bits? */ 866 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 867 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 868 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 869 ni = ieee80211_ref_node(vap->iv_bss); 870 mcopy->m_flags |= M_MCAST; 871 } else { 872 ni = mesh_find_txnode(vap, whcopy->i_addr3); 873 if (ni == NULL) { 874 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 875 "%s", "frame not fwd'd, no path"); 876 vap->iv_stats.is_mesh_fwd_nopath++; 877 m_freem(mcopy); 878 return; 879 } 880 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 881 } 882 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 883 mccopy->mc_ttl--; 884 885 /* XXX calculate priority so drivers can find the tx queue */ 886 M_WME_SETAC(mcopy, WME_AC_BE); 887 888 /* XXX do we know m_nextpkt is NULL? */ 889 mcopy->m_pkthdr.rcvif = (void *) ni; 890 err = ieee80211_handoff(parent, mcopy); 891 if (err != 0) { 892 /* NB: IFQ_HANDOFF reclaims mbuf */ 893 ieee80211_free_node(ni); 894 } else { 895 ifp->if_opackets++; 896 } 897 } 898 899 static struct mbuf * 900 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 901 { 902 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 903 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 904 sizeof(struct ieee80211_meshcntl_ae11)]; 905 const struct ieee80211_qosframe_addr4 *wh; 906 const struct ieee80211_meshcntl_ae10 *mc; 907 struct ether_header *eh; 908 struct llc *llc; 909 int ae; 910 911 if (m->m_len < hdrlen + sizeof(*llc) && 912 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 913 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 914 "discard data frame: %s", "m_pullup failed"); 915 vap->iv_stats.is_rx_tooshort++; 916 return NULL; 917 } 918 memcpy(b, mtod(m, caddr_t), hdrlen); 919 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 920 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 921 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 922 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 923 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 924 925 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 926 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 927 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 928 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 929 !(llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 930 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 931 llc = NULL; 932 } else { 933 m_adj(m, hdrlen - sizeof(*eh)); 934 } 935 eh = mtod(m, struct ether_header *); 936 ae = mc->mc_flags & 3; 937 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 938 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 939 if (ae == 0) { 940 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 941 } else if (ae == 1) { 942 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr4); 943 } else { 944 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 945 (const struct ieee80211_frame *)wh, NULL, 946 "bad AE %d", ae); 947 vap->iv_stats.is_mesh_badae++; 948 m_freem(m); 949 return NULL; 950 } 951 } else { 952 if (ae == 0) { 953 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 954 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 955 } else if (ae == 2) { 956 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr4); 957 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr5); 958 } else { 959 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 960 (const struct ieee80211_frame *)wh, NULL, 961 "bad AE %d", ae); 962 vap->iv_stats.is_mesh_badae++; 963 m_freem(m); 964 return NULL; 965 } 966 } 967 #ifdef ALIGNED_POINTER 968 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 969 m = ieee80211_realign(vap, m, sizeof(*eh)); 970 if (m == NULL) 971 return NULL; 972 } 973 #endif /* ALIGNED_POINTER */ 974 if (llc != NULL) { 975 eh = mtod(m, struct ether_header *); 976 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 977 } 978 return m; 979 #undef WDIR 980 } 981 982 /* 983 * Return non-zero if the unicast mesh data frame should be processed 984 * locally. Frames that are not proxy'd have our address, otherwise 985 * we need to consult the routing table to look for a proxy entry. 986 */ 987 static __inline int 988 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 989 const struct ieee80211_meshcntl *mc) 990 { 991 int ae = mc->mc_flags & 3; 992 993 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 994 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 995 KASSERT(ae == 0 || ae == 2, ("bad AE %d", ae)); 996 if (ae == 2) { /* ucast w/ proxy */ 997 const struct ieee80211_meshcntl_ae10 *mc10 = 998 (const struct ieee80211_meshcntl_ae10 *) mc; 999 struct ieee80211_mesh_route *rt = 1000 ieee80211_mesh_rt_find(vap, mc10->mc_addr4); 1001 /* check for proxy route to ourself */ 1002 return (rt != NULL && 1003 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1004 } else /* ucast w/o proxy */ 1005 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1006 } 1007 1008 static int 1009 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 1010 { 1011 #define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) 1012 #define HAS_SEQ(type) ((type & 0x4) == 0) 1013 struct ieee80211vap *vap = ni->ni_vap; 1014 struct ieee80211com *ic = ni->ni_ic; 1015 struct ifnet *ifp = vap->iv_ifp; 1016 struct ieee80211_frame *wh; 1017 const struct ieee80211_meshcntl *mc; 1018 int hdrspace, meshdrlen, need_tap; 1019 uint8_t dir, type, subtype, qos; 1020 uint32_t seq; 1021 uint8_t *addr; 1022 ieee80211_seq rxseq; 1023 1024 KASSERT(ni != NULL, ("null node")); 1025 ni->ni_inact = ni->ni_inact_reload; 1026 1027 need_tap = 1; /* mbuf need to be tapped. */ 1028 type = -1; /* undefined */ 1029 1030 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1031 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1032 ni->ni_macaddr, NULL, 1033 "too short (1): len %u", m->m_pkthdr.len); 1034 vap->iv_stats.is_rx_tooshort++; 1035 goto out; 1036 } 1037 /* 1038 * Bit of a cheat here, we use a pointer for a 3-address 1039 * frame format but don't reference fields past outside 1040 * ieee80211_frame_min w/o first validating the data is 1041 * present. 1042 */ 1043 wh = mtod(m, struct ieee80211_frame *); 1044 1045 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1046 IEEE80211_FC0_VERSION_0) { 1047 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1048 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1049 vap->iv_stats.is_rx_badversion++; 1050 goto err; 1051 } 1052 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1053 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1054 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1055 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1056 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1057 ni->ni_noise = nf; 1058 if (HAS_SEQ(type)) { 1059 uint8_t tid = ieee80211_gettid(wh); 1060 1061 if (IEEE80211_QOS_HAS_SEQ(wh) && 1062 TID_TO_WME_AC(tid) >= WME_AC_VI) 1063 ic->ic_wme.wme_hipri_traffic++; 1064 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1065 if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && 1066 (wh->i_fc[1] & IEEE80211_FC1_RETRY) && 1067 SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { 1068 /* duplicate, discard */ 1069 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1070 wh->i_addr1, "duplicate", 1071 "seqno <%u,%u> fragno <%u,%u> tid %u", 1072 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1073 ni->ni_rxseqs[tid] >> 1074 IEEE80211_SEQ_SEQ_SHIFT, 1075 rxseq & IEEE80211_SEQ_FRAG_MASK, 1076 ni->ni_rxseqs[tid] & 1077 IEEE80211_SEQ_FRAG_MASK, 1078 tid); 1079 vap->iv_stats.is_rx_dup++; 1080 IEEE80211_NODE_STAT(ni, rx_dup); 1081 goto out; 1082 } 1083 ni->ni_rxseqs[tid] = rxseq; 1084 } 1085 } 1086 #ifdef IEEE80211_DEBUG 1087 /* 1088 * It's easier, but too expensive, to simulate different mesh 1089 * topologies by consulting the ACL policy very early, so do this 1090 * only under DEBUG. 1091 * 1092 * NB: this check is also done upon peering link initiation. 1093 */ 1094 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh->i_addr2)) { 1095 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1096 wh, NULL, "%s", "disallowed by ACL"); 1097 vap->iv_stats.is_rx_acl++; 1098 goto out; 1099 } 1100 #endif 1101 switch (type) { 1102 case IEEE80211_FC0_TYPE_DATA: 1103 if (ni == vap->iv_bss) 1104 goto out; 1105 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1106 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1107 ni->ni_macaddr, NULL, 1108 "peer link not yet established (%d)", 1109 ni->ni_mlstate); 1110 vap->iv_stats.is_mesh_nolink++; 1111 goto out; 1112 } 1113 if (dir != IEEE80211_FC1_DIR_FROMDS && 1114 dir != IEEE80211_FC1_DIR_DSTODS) { 1115 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1116 wh, "data", "incorrect dir 0x%x", dir); 1117 vap->iv_stats.is_rx_wrongdir++; 1118 goto err; 1119 } 1120 /* pull up enough to get to the mesh control */ 1121 hdrspace = ieee80211_hdrspace(ic, wh); 1122 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1123 (m = m_pullup(m, hdrspace + 1124 sizeof(struct ieee80211_meshcntl))) == NULL) { 1125 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1126 ni->ni_macaddr, NULL, 1127 "data too short: expecting %u", hdrspace); 1128 vap->iv_stats.is_rx_tooshort++; 1129 goto out; /* XXX */ 1130 } 1131 /* 1132 * Now calculate the full extent of the headers. Note 1133 * mesh_decap will pull up anything we didn't get 1134 * above when it strips the 802.11 headers. 1135 */ 1136 mc = (const struct ieee80211_meshcntl *) 1137 (mtod(m, const uint8_t *) + hdrspace); 1138 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1139 (mc->mc_flags & 3) * IEEE80211_ADDR_LEN; 1140 hdrspace += meshdrlen; 1141 seq = LE_READ_4(mc->mc_seq); 1142 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1143 addr = wh->i_addr3; 1144 else 1145 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1146 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1147 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1148 addr, "data", "%s", "not to me"); 1149 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1150 goto out; 1151 } 1152 if (mesh_checkpseq(vap, addr, seq) != 0) { 1153 vap->iv_stats.is_rx_dup++; 1154 goto out; 1155 } 1156 1157 /* 1158 * Potentially forward packet. See table s36 (p140) 1159 * for the rules. XXX tap fwd'd packets not for us? 1160 */ 1161 if (dir == IEEE80211_FC1_DIR_FROMDS || 1162 !mesh_isucastforme(vap, wh, mc)) { 1163 mesh_forward(vap, m, mc); 1164 if (dir == IEEE80211_FC1_DIR_DSTODS) 1165 goto out; 1166 /* NB: fall thru to deliver mcast frames locally */ 1167 } 1168 1169 /* 1170 * Save QoS bits for use below--before we strip the header. 1171 */ 1172 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 1173 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 1174 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 1175 ((struct ieee80211_qosframe *)wh)->i_qos[0]; 1176 } else 1177 qos = 0; 1178 /* 1179 * Next up, any fragmentation. 1180 */ 1181 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1182 m = ieee80211_defrag(ni, m, hdrspace); 1183 if (m == NULL) { 1184 /* Fragment dropped or frame not complete yet */ 1185 goto out; 1186 } 1187 } 1188 wh = NULL; /* no longer valid, catch any uses */ 1189 1190 if (ieee80211_radiotap_active_vap(vap)) 1191 ieee80211_radiotap_rx(vap, m); 1192 need_tap = 0; 1193 1194 /* 1195 * Finally, strip the 802.11 header. 1196 */ 1197 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1198 if (m == NULL) { 1199 /* XXX mask bit to check for both */ 1200 /* don't count Null data frames as errors */ 1201 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1202 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1203 goto out; 1204 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1205 ni->ni_macaddr, "data", "%s", "decap error"); 1206 vap->iv_stats.is_rx_decap++; 1207 IEEE80211_NODE_STAT(ni, rx_decap); 1208 goto err; 1209 } 1210 if (qos & IEEE80211_QOS_AMSDU) { 1211 m = ieee80211_decap_amsdu(ni, m); 1212 if (m == NULL) 1213 return IEEE80211_FC0_TYPE_DATA; 1214 } 1215 ieee80211_deliver_data(vap, ni, m); 1216 return type; 1217 case IEEE80211_FC0_TYPE_MGT: 1218 vap->iv_stats.is_rx_mgmt++; 1219 IEEE80211_NODE_STAT(ni, rx_mgmt); 1220 if (dir != IEEE80211_FC1_DIR_NODS) { 1221 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1222 wh, "mgt", "incorrect dir 0x%x", dir); 1223 vap->iv_stats.is_rx_wrongdir++; 1224 goto err; 1225 } 1226 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1227 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1228 ni->ni_macaddr, "mgt", "too short: len %u", 1229 m->m_pkthdr.len); 1230 vap->iv_stats.is_rx_tooshort++; 1231 goto out; 1232 } 1233 #ifdef IEEE80211_DEBUG 1234 if ((ieee80211_msg_debug(vap) && 1235 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1236 ieee80211_msg_dumppkts(vap)) { 1237 if_printf(ifp, "received %s from %6D rssi %d\n", 1238 ieee80211_mgt_subtype_name[subtype >> 1239 IEEE80211_FC0_SUBTYPE_SHIFT], 1240 wh->i_addr2, ":", rssi); 1241 } 1242 #endif 1243 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1244 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1245 wh, NULL, "%s", "WEP set but not permitted"); 1246 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1247 goto out; 1248 } 1249 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1250 goto out; 1251 case IEEE80211_FC0_TYPE_CTL: 1252 vap->iv_stats.is_rx_ctl++; 1253 IEEE80211_NODE_STAT(ni, rx_ctrl); 1254 goto out; 1255 default: 1256 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1257 wh, "bad", "frame type 0x%x", type); 1258 /* should not come here */ 1259 break; 1260 } 1261 err: 1262 ifp->if_ierrors++; 1263 out: 1264 if (m != NULL) { 1265 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1266 ieee80211_radiotap_rx(vap, m); 1267 m_freem(m); 1268 } 1269 return type; 1270 } 1271 1272 static void 1273 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1274 int rssi, int nf) 1275 { 1276 struct ieee80211vap *vap = ni->ni_vap; 1277 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1278 struct ieee80211com *ic = ni->ni_ic; 1279 struct ieee80211_frame *wh; 1280 uint8_t *frm, *efrm; 1281 1282 wh = mtod(m0, struct ieee80211_frame *); 1283 frm = (uint8_t *)&wh[1]; 1284 efrm = mtod(m0, uint8_t *) + m0->m_len; 1285 switch (subtype) { 1286 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1287 case IEEE80211_FC0_SUBTYPE_BEACON: 1288 { 1289 struct ieee80211_scanparams scan; 1290 /* 1291 * We process beacon/probe response 1292 * frames to discover neighbors. 1293 */ 1294 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1295 return; 1296 /* 1297 * Count frame now that we know it's to be processed. 1298 */ 1299 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1300 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1301 IEEE80211_NODE_STAT(ni, rx_beacons); 1302 } else 1303 IEEE80211_NODE_STAT(ni, rx_proberesp); 1304 /* 1305 * If scanning, just pass information to the scan module. 1306 */ 1307 if (ic->ic_flags & IEEE80211_F_SCAN) { 1308 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1309 /* 1310 * Actively scanning a channel marked passive; 1311 * send a probe request now that we know there 1312 * is 802.11 traffic present. 1313 * 1314 * XXX check if the beacon we recv'd gives 1315 * us what we need and suppress the probe req 1316 */ 1317 ieee80211_probe_curchan(vap, 1); 1318 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1319 } 1320 ieee80211_add_scan(vap, &scan, wh, 1321 subtype, rssi, nf); 1322 return; 1323 } 1324 1325 /* The rest of this code assumes we are running */ 1326 if (vap->iv_state != IEEE80211_S_RUN) 1327 return; 1328 /* 1329 * Ignore non-mesh STAs. 1330 */ 1331 if ((scan.capinfo & 1332 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1333 scan.meshid == NULL || scan.meshconf == NULL) { 1334 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1335 wh, "beacon", "%s", "not a mesh sta"); 1336 vap->iv_stats.is_mesh_wrongmesh++; 1337 return; 1338 } 1339 /* 1340 * Ignore STAs for other mesh networks. 1341 */ 1342 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1343 mesh_verify_meshconf(vap, scan.meshconf)) { 1344 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1345 wh, "beacon", "%s", "not for our mesh"); 1346 vap->iv_stats.is_mesh_wrongmesh++; 1347 return; 1348 } 1349 /* 1350 * Peer only based on the current ACL policy. 1351 */ 1352 if (vap->iv_acl != NULL && 1353 !vap->iv_acl->iac_check(vap, wh->i_addr2)) { 1354 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1355 wh, NULL, "%s", "disallowed by ACL"); 1356 vap->iv_stats.is_rx_acl++; 1357 return; 1358 } 1359 /* 1360 * Do neighbor discovery. 1361 */ 1362 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1363 /* 1364 * Create a new entry in the neighbor table. 1365 */ 1366 ni = ieee80211_add_neighbor(vap, wh, &scan); 1367 } 1368 /* 1369 * Automatically peer with discovered nodes if possible. 1370 * XXX backoff on repeated failure 1371 */ 1372 if (ni != vap->iv_bss && 1373 (ms->ms_flags & IEEE80211_MESHFLAGS_AP) && 1374 ni->ni_mlstate == IEEE80211_NODE_MESH_IDLE) { 1375 uint16_t args[1]; 1376 1377 ni->ni_mlpid = mesh_generateid(vap); 1378 if (ni->ni_mlpid == 0) 1379 return; 1380 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1381 args[0] = ni->ni_mlpid; 1382 ieee80211_send_action(ni, 1383 IEEE80211_ACTION_CAT_MESHPEERING, 1384 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1385 ni->ni_mlrcnt = 0; 1386 mesh_peer_timeout_setup(ni); 1387 } 1388 break; 1389 } 1390 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1391 { 1392 uint8_t *ssid, *meshid, *rates, *xrates; 1393 uint8_t *sfrm; 1394 1395 if (vap->iv_state != IEEE80211_S_RUN) { 1396 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1397 wh, NULL, "wrong state %s", 1398 ieee80211_state_name[vap->iv_state]); 1399 vap->iv_stats.is_rx_mgtdiscard++; 1400 return; 1401 } 1402 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1403 /* frame must be directed */ 1404 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1405 wh, NULL, "%s", "not unicast"); 1406 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1407 return; 1408 } 1409 /* 1410 * prreq frame format 1411 * [tlv] ssid 1412 * [tlv] supported rates 1413 * [tlv] extended supported rates 1414 * [tlv] mesh id 1415 */ 1416 ssid = meshid = rates = xrates = NULL; 1417 sfrm = frm; 1418 while (efrm - frm > 1) { 1419 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1420 switch (*frm) { 1421 case IEEE80211_ELEMID_SSID: 1422 ssid = frm; 1423 break; 1424 case IEEE80211_ELEMID_RATES: 1425 rates = frm; 1426 break; 1427 case IEEE80211_ELEMID_XRATES: 1428 xrates = frm; 1429 break; 1430 case IEEE80211_ELEMID_MESHID: 1431 meshid = frm; 1432 break; 1433 } 1434 frm += frm[2] + 2; 1435 } 1436 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1437 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1438 if (xrates != NULL) 1439 IEEE80211_VERIFY_ELEMENT(xrates, 1440 IEEE80211_RATE_MAXSIZE - rates[1], return); 1441 if (meshid != NULL) { 1442 IEEE80211_VERIFY_ELEMENT(meshid, 1443 IEEE80211_MESHID_LEN, return); 1444 /* NB: meshid, not ssid */ 1445 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 1446 } 1447 1448 /* XXX find a better class or define it's own */ 1449 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1450 "%s", "recv probe req"); 1451 /* 1452 * Some legacy 11b clients cannot hack a complete 1453 * probe response frame. When the request includes 1454 * only a bare-bones rate set, communicate this to 1455 * the transmit side. 1456 */ 1457 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 1458 break; 1459 } 1460 case IEEE80211_FC0_SUBTYPE_ACTION: 1461 if (vap->iv_state != IEEE80211_S_RUN) { 1462 vap->iv_stats.is_rx_mgtdiscard++; 1463 break; 1464 } 1465 /* 1466 * We received an action for an unknown neighbor. 1467 * XXX: wait for it to beacon or create ieee80211_node? 1468 */ 1469 if (ni == vap->iv_bss) { 1470 IEEE80211_DISCARD(vap, IEEE80211_MSG_MESH, 1471 wh, NULL, "%s", "unknown node"); 1472 vap->iv_stats.is_rx_mgtdiscard++; 1473 break; 1474 } 1475 /* 1476 * Discard if not for us. 1477 */ 1478 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1479 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1480 IEEE80211_DISCARD(vap, IEEE80211_MSG_MESH, 1481 wh, NULL, "%s", "not for me"); 1482 vap->iv_stats.is_rx_mgtdiscard++; 1483 break; 1484 } 1485 /* XXX parse_action is a bit useless now */ 1486 if (ieee80211_parse_action(ni, m0) == 0) 1487 ic->ic_recv_action(ni, wh, frm, efrm); 1488 break; 1489 case IEEE80211_FC0_SUBTYPE_AUTH: 1490 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1491 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1492 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1493 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 1494 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1495 case IEEE80211_FC0_SUBTYPE_DISASSOC: 1496 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1497 wh, NULL, "%s", "not handled"); 1498 vap->iv_stats.is_rx_mgtdiscard++; 1499 return; 1500 default: 1501 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1502 wh, "mgt", "subtype 0x%x not handled", subtype); 1503 vap->iv_stats.is_rx_badsubtype++; 1504 break; 1505 } 1506 } 1507 1508 /* 1509 * Parse meshpeering action ie's for open+confirm frames; the 1510 * important bits are returned in the supplied structure. 1511 */ 1512 static const struct ieee80211_meshpeer_ie * 1513 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 1514 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 1515 const uint8_t *frm, const uint8_t *efrm, 1516 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 1517 { 1518 struct ieee80211vap *vap = ni->ni_vap; 1519 const struct ieee80211_meshpeer_ie *mpie; 1520 const uint8_t *meshid, *meshconf, *meshpeer; 1521 1522 meshid = meshconf = meshpeer = NULL; 1523 while (efrm - frm > 1) { 1524 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 1525 switch (*frm) { 1526 case IEEE80211_ELEMID_MESHID: 1527 meshid = frm; 1528 break; 1529 case IEEE80211_ELEMID_MESHCONF: 1530 meshconf = frm; 1531 break; 1532 case IEEE80211_ELEMID_MESHPEER: 1533 meshpeer = frm; 1534 mpie = (const struct ieee80211_meshpeer_ie *) frm; 1535 memset(mp, 0, sizeof(*mp)); 1536 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 1537 /* NB: peer link ID is optional on these frames */ 1538 if (subtype == IEEE80211_MESH_PEER_LINK_CLOSE && 1539 mpie->peer_len == 8) { 1540 mp->peer_linkid = 0; 1541 mp->peer_rcode = LE_READ_2(&mpie->peer_linkid); 1542 } else { 1543 mp->peer_linkid = LE_READ_2(&mpie->peer_linkid); 1544 mp->peer_rcode = LE_READ_2(&mpie->peer_rcode); 1545 } 1546 break; 1547 } 1548 frm += frm[1] + 2; 1549 } 1550 1551 /* 1552 * Verify the contents of the frame. Action frames with 1553 * close subtype don't have a Mesh Configuration IE. 1554 * If if fails validation, close the peer link. 1555 */ 1556 KASSERT(meshpeer != NULL && 1557 subtype != IEEE80211_ACTION_MESHPEERING_CLOSE, 1558 ("parsing close action")); 1559 1560 if (mesh_verify_meshid(vap, meshid) || 1561 mesh_verify_meshpeer(vap, subtype, meshpeer) || 1562 mesh_verify_meshconf(vap, meshconf)) { 1563 uint16_t args[3]; 1564 1565 IEEE80211_DISCARD(vap, 1566 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1567 wh, NULL, "%s", "not for our mesh"); 1568 vap->iv_stats.is_rx_mgtdiscard++; 1569 switch (ni->ni_mlstate) { 1570 case IEEE80211_NODE_MESH_IDLE: 1571 case IEEE80211_NODE_MESH_ESTABLISHED: 1572 case IEEE80211_NODE_MESH_HOLDING: 1573 /* ignore */ 1574 break; 1575 case IEEE80211_NODE_MESH_OPENSNT: 1576 case IEEE80211_NODE_MESH_OPENRCV: 1577 case IEEE80211_NODE_MESH_CONFIRMRCV: 1578 args[0] = ni->ni_mlpid; 1579 args[1] = ni->ni_mllid; 1580 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1581 ieee80211_send_action(ni, 1582 IEEE80211_ACTION_CAT_MESHPEERING, 1583 IEEE80211_ACTION_MESHPEERING_CLOSE, 1584 args); 1585 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1586 mesh_peer_timeout_setup(ni); 1587 break; 1588 } 1589 return NULL; 1590 } 1591 return (const struct ieee80211_meshpeer_ie *) mp; 1592 } 1593 1594 static int 1595 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 1596 const struct ieee80211_frame *wh, 1597 const uint8_t *frm, const uint8_t *efrm) 1598 { 1599 struct ieee80211vap *vap = ni->ni_vap; 1600 struct ieee80211_meshpeer_ie ie; 1601 const struct ieee80211_meshpeer_ie *meshpeer; 1602 uint16_t args[3]; 1603 1604 /* +2+2 for action + code + capabilites */ 1605 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 1606 IEEE80211_ACTION_MESHPEERING_OPEN); 1607 if (meshpeer == NULL) { 1608 return 0; 1609 } 1610 1611 /* XXX move up */ 1612 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1613 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 1614 1615 switch (ni->ni_mlstate) { 1616 case IEEE80211_NODE_MESH_IDLE: 1617 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 1618 ni->ni_mllid = meshpeer->peer_llinkid; 1619 ni->ni_mlpid = mesh_generateid(vap); 1620 if (ni->ni_mlpid == 0) 1621 return 0; /* XXX */ 1622 args[0] = ni->ni_mlpid; 1623 /* Announce we're open too... */ 1624 ieee80211_send_action(ni, 1625 IEEE80211_ACTION_CAT_MESHPEERING, 1626 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1627 /* ...and confirm the link. */ 1628 args[0] = ni->ni_mlpid; 1629 args[1] = ni->ni_mllid; 1630 ieee80211_send_action(ni, 1631 IEEE80211_ACTION_CAT_MESHPEERING, 1632 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1633 args); 1634 mesh_peer_timeout_setup(ni); 1635 break; 1636 case IEEE80211_NODE_MESH_OPENRCV: 1637 /* Wrong Link ID */ 1638 if (ni->ni_mllid != meshpeer->peer_llinkid) { 1639 args[0] = ni->ni_mllid; 1640 args[1] = ni->ni_mlpid; 1641 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1642 ieee80211_send_action(ni, 1643 IEEE80211_ACTION_CAT_MESHPEERING, 1644 IEEE80211_ACTION_MESHPEERING_CLOSE, 1645 args); 1646 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1647 mesh_peer_timeout_setup(ni); 1648 break; 1649 } 1650 /* Duplicate open, confirm again. */ 1651 args[0] = ni->ni_mlpid; 1652 args[1] = ni->ni_mllid; 1653 ieee80211_send_action(ni, 1654 IEEE80211_ACTION_CAT_MESHPEERING, 1655 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1656 args); 1657 break; 1658 case IEEE80211_NODE_MESH_OPENSNT: 1659 ni->ni_mllid = meshpeer->peer_llinkid; 1660 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 1661 args[0] = ni->ni_mlpid; 1662 args[1] = ni->ni_mllid; 1663 ieee80211_send_action(ni, 1664 IEEE80211_ACTION_CAT_MESHPEERING, 1665 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1666 args); 1667 /* NB: don't setup/clear any timeout */ 1668 break; 1669 case IEEE80211_NODE_MESH_CONFIRMRCV: 1670 if (ni->ni_mlpid != meshpeer->peer_linkid || 1671 ni->ni_mllid != meshpeer->peer_llinkid) { 1672 args[0] = ni->ni_mlpid; 1673 args[1] = ni->ni_mllid; 1674 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1675 ieee80211_send_action(ni, 1676 IEEE80211_ACTION_CAT_MESHPEERING, 1677 IEEE80211_ACTION_MESHPEERING_CLOSE, 1678 args); 1679 mesh_linkchange(ni, 1680 IEEE80211_NODE_MESH_HOLDING); 1681 mesh_peer_timeout_setup(ni); 1682 break; 1683 } 1684 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 1685 ni->ni_mllid = meshpeer->peer_llinkid; 1686 args[0] = ni->ni_mlpid; 1687 args[1] = ni->ni_mllid; 1688 ieee80211_send_action(ni, 1689 IEEE80211_ACTION_CAT_MESHPEERING, 1690 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1691 args); 1692 mesh_peer_timeout_stop(ni); 1693 break; 1694 case IEEE80211_NODE_MESH_ESTABLISHED: 1695 if (ni->ni_mllid != meshpeer->peer_llinkid) { 1696 args[0] = ni->ni_mllid; 1697 args[1] = ni->ni_mlpid; 1698 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1699 ieee80211_send_action(ni, 1700 IEEE80211_ACTION_CAT_MESHPEERING, 1701 IEEE80211_ACTION_MESHPEERING_CLOSE, 1702 args); 1703 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1704 mesh_peer_timeout_setup(ni); 1705 break; 1706 } 1707 args[0] = ni->ni_mlpid; 1708 args[1] = ni->ni_mllid; 1709 ieee80211_send_action(ni, 1710 IEEE80211_ACTION_CAT_MESHPEERING, 1711 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1712 args); 1713 break; 1714 case IEEE80211_NODE_MESH_HOLDING: 1715 args[0] = ni->ni_mlpid; 1716 args[1] = meshpeer->peer_llinkid; 1717 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 1718 ieee80211_send_action(ni, 1719 IEEE80211_ACTION_CAT_MESHPEERING, 1720 IEEE80211_ACTION_MESHPEERING_CLOSE, 1721 args); 1722 break; 1723 } 1724 return 0; 1725 } 1726 1727 static int 1728 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 1729 const struct ieee80211_frame *wh, 1730 const uint8_t *frm, const uint8_t *efrm) 1731 { 1732 struct ieee80211vap *vap = ni->ni_vap; 1733 struct ieee80211_meshpeer_ie ie; 1734 const struct ieee80211_meshpeer_ie *meshpeer; 1735 uint16_t args[3]; 1736 1737 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 1738 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 1739 IEEE80211_ACTION_MESHPEERING_CONFIRM); 1740 if (meshpeer == NULL) { 1741 return 0; 1742 } 1743 1744 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1745 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 1746 meshpeer->peer_llinkid, meshpeer->peer_linkid); 1747 1748 switch (ni->ni_mlstate) { 1749 case IEEE80211_NODE_MESH_OPENRCV: 1750 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 1751 mesh_peer_timeout_stop(ni); 1752 break; 1753 case IEEE80211_NODE_MESH_OPENSNT: 1754 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 1755 break; 1756 case IEEE80211_NODE_MESH_HOLDING: 1757 args[0] = ni->ni_mlpid; 1758 args[1] = meshpeer->peer_llinkid; 1759 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 1760 ieee80211_send_action(ni, 1761 IEEE80211_ACTION_CAT_MESHPEERING, 1762 IEEE80211_ACTION_MESHPEERING_CLOSE, 1763 args); 1764 break; 1765 case IEEE80211_NODE_MESH_CONFIRMRCV: 1766 if (ni->ni_mllid != meshpeer->peer_llinkid) { 1767 args[0] = ni->ni_mlpid; 1768 args[1] = ni->ni_mllid; 1769 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1770 ieee80211_send_action(ni, 1771 IEEE80211_ACTION_CAT_MESHPEERING, 1772 IEEE80211_ACTION_MESHPEERING_CLOSE, 1773 args); 1774 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1775 mesh_peer_timeout_setup(ni); 1776 } 1777 break; 1778 default: 1779 IEEE80211_DISCARD(vap, 1780 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1781 wh, NULL, "received confirm in invalid state %d", 1782 ni->ni_mlstate); 1783 vap->iv_stats.is_rx_mgtdiscard++; 1784 break; 1785 } 1786 return 0; 1787 } 1788 1789 static int 1790 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 1791 const struct ieee80211_frame *wh, 1792 const uint8_t *frm, const uint8_t *efrm) 1793 { 1794 uint16_t args[3]; 1795 1796 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1797 ni, "%s", "recv PEER CLOSE"); 1798 1799 switch (ni->ni_mlstate) { 1800 case IEEE80211_NODE_MESH_IDLE: 1801 /* ignore */ 1802 break; 1803 case IEEE80211_NODE_MESH_OPENRCV: 1804 case IEEE80211_NODE_MESH_OPENSNT: 1805 case IEEE80211_NODE_MESH_CONFIRMRCV: 1806 case IEEE80211_NODE_MESH_ESTABLISHED: 1807 args[0] = ni->ni_mlpid; 1808 args[1] = ni->ni_mllid; 1809 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 1810 ieee80211_send_action(ni, 1811 IEEE80211_ACTION_CAT_MESHPEERING, 1812 IEEE80211_ACTION_MESHPEERING_CLOSE, 1813 args); 1814 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1815 mesh_peer_timeout_setup(ni); 1816 break; 1817 case IEEE80211_NODE_MESH_HOLDING: 1818 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 1819 mesh_peer_timeout_setup(ni); 1820 break; 1821 } 1822 return 0; 1823 } 1824 1825 /* 1826 * Link Metric handling. 1827 */ 1828 static int 1829 mesh_recv_action_meshlmetric_req(struct ieee80211_node *ni, 1830 const struct ieee80211_frame *wh, 1831 const uint8_t *frm, const uint8_t *efrm) 1832 { 1833 uint32_t metric; 1834 1835 metric = mesh_airtime_calc(ni); 1836 ieee80211_send_action(ni, 1837 IEEE80211_ACTION_CAT_MESHLMETRIC, 1838 IEEE80211_ACTION_MESHLMETRIC_REP, 1839 &metric); 1840 return 0; 1841 } 1842 1843 static int 1844 mesh_recv_action_meshlmetric_rep(struct ieee80211_node *ni, 1845 const struct ieee80211_frame *wh, 1846 const uint8_t *frm, const uint8_t *efrm) 1847 { 1848 return 0; 1849 } 1850 1851 static int 1852 mesh_send_action(struct ieee80211_node *ni, struct mbuf *m) 1853 { 1854 struct ieee80211_bpf_params params; 1855 1856 memset(¶ms, 0, sizeof(params)); 1857 params.ibp_pri = WME_AC_VO; 1858 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 1859 /* XXX ucast/mcast */ 1860 params.ibp_try0 = ni->ni_txparms->maxretry; 1861 params.ibp_power = ni->ni_txpower; 1862 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION, 1863 ¶ms); 1864 } 1865 1866 #define ADDSHORT(frm, v) do { \ 1867 frm[0] = (v) & 0xff; \ 1868 frm[1] = (v) >> 8; \ 1869 frm += 2; \ 1870 } while (0) 1871 #define ADDWORD(frm, v) do { \ 1872 frm[0] = (v) & 0xff; \ 1873 frm[1] = ((v) >> 8) & 0xff; \ 1874 frm[2] = ((v) >> 16) & 0xff; \ 1875 frm[3] = ((v) >> 24) & 0xff; \ 1876 frm += 4; \ 1877 } while (0) 1878 1879 static int 1880 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 1881 int category, int action, void *args0) 1882 { 1883 struct ieee80211vap *vap = ni->ni_vap; 1884 struct ieee80211com *ic = ni->ni_ic; 1885 uint16_t *args = args0; 1886 const struct ieee80211_rateset *rs; 1887 struct mbuf *m; 1888 uint8_t *frm; 1889 1890 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1891 "send PEER OPEN action: localid 0x%x", args[0]); 1892 1893 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1894 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 1895 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 1896 ieee80211_ref_node(ni); 1897 1898 m = ieee80211_getmgtframe(&frm, 1899 ic->ic_headroom + sizeof(struct ieee80211_frame), 1900 sizeof(uint16_t) /* action+category */ 1901 + sizeof(uint16_t) /* capabilites */ 1902 + 2 + IEEE80211_RATE_SIZE 1903 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1904 + 2 + IEEE80211_MESHID_LEN 1905 + sizeof(struct ieee80211_meshconf_ie) 1906 + sizeof(struct ieee80211_meshpeer_ie) 1907 ); 1908 if (m != NULL) { 1909 /* 1910 * mesh peer open action frame format: 1911 * [1] category 1912 * [1] action 1913 * [2] capabilities 1914 * [tlv] rates 1915 * [tlv] xrates 1916 * [tlv] mesh id 1917 * [tlv] mesh conf 1918 * [tlv] mesh peer link mgmt 1919 */ 1920 *frm++ = category; 1921 *frm++ = action; 1922 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 1923 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 1924 frm = ieee80211_add_rates(frm, rs); 1925 frm = ieee80211_add_xrates(frm, rs); 1926 frm = ieee80211_add_meshid(frm, vap); 1927 frm = ieee80211_add_meshconf(frm, vap); 1928 frm = ieee80211_add_meshpeer(frm, IEEE80211_MESH_PEER_LINK_OPEN, 1929 args[0], 0, 0); 1930 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1931 return mesh_send_action(ni, m); 1932 } else { 1933 vap->iv_stats.is_tx_nobuf++; 1934 ieee80211_free_node(ni); 1935 return ENOMEM; 1936 } 1937 } 1938 1939 static int 1940 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 1941 int category, int action, void *args0) 1942 { 1943 struct ieee80211vap *vap = ni->ni_vap; 1944 struct ieee80211com *ic = ni->ni_ic; 1945 uint16_t *args = args0; 1946 const struct ieee80211_rateset *rs; 1947 struct mbuf *m; 1948 uint8_t *frm; 1949 1950 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1951 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 1952 args[0], args[1]); 1953 1954 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1955 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 1956 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 1957 ieee80211_ref_node(ni); 1958 1959 m = ieee80211_getmgtframe(&frm, 1960 ic->ic_headroom + sizeof(struct ieee80211_frame), 1961 sizeof(uint16_t) /* action+category */ 1962 + sizeof(uint16_t) /* capabilites */ 1963 + sizeof(uint16_t) /* status code */ 1964 + sizeof(uint16_t) /* AID */ 1965 + 2 + IEEE80211_RATE_SIZE 1966 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1967 + 2 + IEEE80211_MESHID_LEN 1968 + sizeof(struct ieee80211_meshconf_ie) 1969 + sizeof(struct ieee80211_meshpeer_ie) 1970 ); 1971 if (m != NULL) { 1972 /* 1973 * mesh peer confirm action frame format: 1974 * [1] category 1975 * [1] action 1976 * [2] capabilities 1977 * [2] status code 1978 * [2] association id (peer ID) 1979 * [tlv] rates 1980 * [tlv] xrates 1981 * [tlv] mesh id 1982 * [tlv] mesh conf 1983 * [tlv] mesh peer link mgmt 1984 */ 1985 *frm++ = category; 1986 *frm++ = action; 1987 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 1988 ADDSHORT(frm, 0); /* status code */ 1989 ADDSHORT(frm, args[1]); /* AID */ 1990 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 1991 frm = ieee80211_add_rates(frm, rs); 1992 frm = ieee80211_add_xrates(frm, rs); 1993 frm = ieee80211_add_meshid(frm, vap); 1994 frm = ieee80211_add_meshconf(frm, vap); 1995 frm = ieee80211_add_meshpeer(frm, 1996 IEEE80211_MESH_PEER_LINK_CONFIRM, 1997 args[0], args[1], 0); 1998 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1999 return mesh_send_action(ni, m); 2000 } else { 2001 vap->iv_stats.is_tx_nobuf++; 2002 ieee80211_free_node(ni); 2003 return ENOMEM; 2004 } 2005 } 2006 2007 static int 2008 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2009 int category, int action, void *args0) 2010 { 2011 struct ieee80211vap *vap = ni->ni_vap; 2012 struct ieee80211com *ic = ni->ni_ic; 2013 uint16_t *args = args0; 2014 struct mbuf *m; 2015 uint8_t *frm; 2016 2017 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2018 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2019 args[0], args[1], args[2]); 2020 2021 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2022 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 2023 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 2024 ieee80211_ref_node(ni); 2025 2026 m = ieee80211_getmgtframe(&frm, 2027 ic->ic_headroom + sizeof(struct ieee80211_frame), 2028 sizeof(uint16_t) /* action+category */ 2029 + sizeof(uint16_t) /* reason code */ 2030 + 2 + IEEE80211_MESHID_LEN 2031 + sizeof(struct ieee80211_meshpeer_ie) 2032 ); 2033 if (m != NULL) { 2034 /* 2035 * mesh peer close action frame format: 2036 * [1] category 2037 * [1] action 2038 * [2] reason code 2039 * [tlv] mesh id 2040 * [tlv] mesh peer link mgmt 2041 */ 2042 *frm++ = category; 2043 *frm++ = action; 2044 ADDSHORT(frm, args[2]); /* reason code */ 2045 frm = ieee80211_add_meshid(frm, vap); 2046 frm = ieee80211_add_meshpeer(frm, 2047 IEEE80211_MESH_PEER_LINK_CLOSE, 2048 args[0], args[1], args[2]); 2049 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2050 return mesh_send_action(ni, m); 2051 } else { 2052 vap->iv_stats.is_tx_nobuf++; 2053 ieee80211_free_node(ni); 2054 return ENOMEM; 2055 } 2056 } 2057 2058 static int 2059 mesh_send_action_meshlink_request(struct ieee80211_node *ni, 2060 int category, int action, void *arg0) 2061 { 2062 struct ieee80211vap *vap = ni->ni_vap; 2063 struct ieee80211com *ic = ni->ni_ic; 2064 struct mbuf *m; 2065 uint8_t *frm; 2066 2067 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2068 "%s", "send LINK METRIC REQUEST action"); 2069 2070 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2071 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 2072 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 2073 ieee80211_ref_node(ni); 2074 2075 m = ieee80211_getmgtframe(&frm, 2076 ic->ic_headroom + sizeof(struct ieee80211_frame), 2077 sizeof(uint16_t) /* action+category */ 2078 ); 2079 if (m != NULL) { 2080 /* 2081 * mesh link metric request 2082 * [1] category 2083 * [1] action 2084 */ 2085 *frm++ = category; 2086 *frm++ = action; 2087 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2088 return mesh_send_action(ni, m); 2089 } else { 2090 vap->iv_stats.is_tx_nobuf++; 2091 ieee80211_free_node(ni); 2092 return ENOMEM; 2093 } 2094 } 2095 2096 static int 2097 mesh_send_action_meshlink_reply(struct ieee80211_node *ni, 2098 int category, int action, void *args0) 2099 { 2100 struct ieee80211vap *vap = ni->ni_vap; 2101 struct ieee80211com *ic = ni->ni_ic; 2102 uint32_t *metric = args0; 2103 struct mbuf *m; 2104 uint8_t *frm; 2105 2106 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2107 "send LINK METRIC REPLY action: metric 0x%x", *metric); 2108 2109 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2110 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 2111 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 2112 ieee80211_ref_node(ni); 2113 2114 m = ieee80211_getmgtframe(&frm, 2115 ic->ic_headroom + sizeof(struct ieee80211_frame), 2116 sizeof(uint16_t) /* action+category */ 2117 + sizeof(struct ieee80211_meshlmetric_ie) 2118 ); 2119 if (m != NULL) { 2120 /* 2121 * mesh link metric reply 2122 * [1] category 2123 * [1] action 2124 * [tlv] mesh link metric 2125 */ 2126 *frm++ = category; 2127 *frm++ = action; 2128 frm = ieee80211_add_meshlmetric(frm, *metric); 2129 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2130 return mesh_send_action(ni, m); 2131 } else { 2132 vap->iv_stats.is_tx_nobuf++; 2133 ieee80211_free_node(ni); 2134 return ENOMEM; 2135 } 2136 } 2137 2138 static void 2139 mesh_peer_timeout_setup(struct ieee80211_node *ni) 2140 { 2141 switch (ni->ni_mlstate) { 2142 case IEEE80211_NODE_MESH_HOLDING: 2143 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 2144 break; 2145 case IEEE80211_NODE_MESH_CONFIRMRCV: 2146 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 2147 break; 2148 case IEEE80211_NODE_MESH_IDLE: 2149 ni->ni_mltval = 0; 2150 break; 2151 default: 2152 ni->ni_mltval = ieee80211_mesh_retrytimeout; 2153 break; 2154 } 2155 if (ni->ni_mltval) { 2156 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2157 mesh_peer_timeout_callout, ni); 2158 } 2159 } 2160 2161 /* 2162 * Same as above but backoffs timer statisically 50%. 2163 */ 2164 static void 2165 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 2166 { 2167 uint32_t r; 2168 2169 r = karc4random(); 2170 ni->ni_mltval += r % ni->ni_mltval; 2171 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2172 mesh_peer_timeout_callout, ni); 2173 } 2174 2175 static __inline void 2176 mesh_peer_timeout_stop(struct ieee80211_node *ni) 2177 { 2178 callout_stop(&ni->ni_mltimer); 2179 } 2180 2181 /* 2182 * Mesh Peer Link Management FSM timeout handling. 2183 */ 2184 static void 2185 mesh_peer_timeout_callout(void *arg) 2186 { 2187 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 2188 uint16_t args[3]; 2189 2190 wlan_serialize_enter(); 2191 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 2192 ni, "mesh link timeout, state %d, retry counter %d", 2193 ni->ni_mlstate, ni->ni_mlrcnt); 2194 2195 switch (ni->ni_mlstate) { 2196 case IEEE80211_NODE_MESH_IDLE: 2197 case IEEE80211_NODE_MESH_ESTABLISHED: 2198 break; 2199 case IEEE80211_NODE_MESH_OPENSNT: 2200 case IEEE80211_NODE_MESH_OPENRCV: 2201 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 2202 args[0] = ni->ni_mlpid; 2203 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 2204 ieee80211_send_action(ni, 2205 IEEE80211_ACTION_CAT_MESHPEERING, 2206 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2207 ni->ni_mlrcnt = 0; 2208 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2209 mesh_peer_timeout_setup(ni); 2210 } else { 2211 args[0] = ni->ni_mlpid; 2212 ieee80211_send_action(ni, 2213 IEEE80211_ACTION_CAT_MESHPEERING, 2214 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2215 ni->ni_mlrcnt++; 2216 mesh_peer_timeout_backoff(ni); 2217 } 2218 break; 2219 case IEEE80211_NODE_MESH_CONFIRMRCV: 2220 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 2221 args[0] = ni->ni_mlpid; 2222 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 2223 ieee80211_send_action(ni, 2224 IEEE80211_ACTION_CAT_MESHPEERING, 2225 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2226 ni->ni_mlrcnt = 0; 2227 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2228 mesh_peer_timeout_setup(ni); 2229 } else { 2230 ni->ni_mlrcnt++; 2231 mesh_peer_timeout_setup(ni); 2232 } 2233 break; 2234 case IEEE80211_NODE_MESH_HOLDING: 2235 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2236 break; 2237 } 2238 wlan_serialize_exit(); 2239 } 2240 2241 static int 2242 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 2243 { 2244 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2245 2246 if (ie == NULL || ie[1] != ms->ms_idlen) 2247 return 1; 2248 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 2249 } 2250 2251 /* 2252 * Check if we are using the same algorithms for this mesh. 2253 */ 2254 static int 2255 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 2256 { 2257 const struct ieee80211_meshconf_ie *meshconf = 2258 (const struct ieee80211_meshconf_ie *) ie; 2259 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 2260 uint16_t cap; 2261 2262 if (meshconf == NULL) 2263 return 1; 2264 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 2265 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2266 "unknown path selection algorithm: 0x%x\n", 2267 meshconf->conf_pselid); 2268 return 1; 2269 } 2270 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 2271 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2272 "unknown path metric algorithm: 0x%x\n", 2273 meshconf->conf_pmetid); 2274 return 1; 2275 } 2276 if (meshconf->conf_ccid != 0) { 2277 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2278 "unknown congestion control algorithm: 0x%x\n", 2279 meshconf->conf_ccid); 2280 return 1; 2281 } 2282 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 2283 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2284 "unknown sync algorithm: 0x%x\n", 2285 meshconf->conf_syncid); 2286 return 1; 2287 } 2288 if (meshconf->conf_authid != 0) { 2289 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2290 "unknown auth auth algorithm: 0x%x\n", 2291 meshconf->conf_pselid); 2292 return 1; 2293 } 2294 /* NB: conf_cap is only read correctly here */ 2295 cap = LE_READ_2(&meshconf->conf_cap); 2296 /* Not accepting peers */ 2297 if (!(cap & IEEE80211_MESHCONF_CAP_AP)) { 2298 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2299 "not accepting peers: 0x%x\n", meshconf->conf_cap); 2300 return 1; 2301 } 2302 return 0; 2303 } 2304 2305 static int 2306 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 2307 const uint8_t *ie) 2308 { 2309 const struct ieee80211_meshpeer_ie *meshpeer = 2310 (const struct ieee80211_meshpeer_ie *) ie; 2311 2312 if (meshpeer == NULL || meshpeer->peer_len < 6 || 2313 meshpeer->peer_len > 10) 2314 return 1; 2315 switch (subtype) { 2316 case IEEE80211_MESH_PEER_LINK_OPEN: 2317 if (meshpeer->peer_len != 6) 2318 return 1; 2319 break; 2320 case IEEE80211_MESH_PEER_LINK_CONFIRM: 2321 if (meshpeer->peer_len != 8) 2322 return 1; 2323 break; 2324 case IEEE80211_MESH_PEER_LINK_CLOSE: 2325 if (meshpeer->peer_len < 8) 2326 return 1; 2327 if (meshpeer->peer_len == 8 && meshpeer->peer_linkid != 0) 2328 return 1; 2329 if (meshpeer->peer_rcode == 0) 2330 return 1; 2331 break; 2332 } 2333 return 0; 2334 } 2335 2336 /* 2337 * Add a Mesh ID IE to a frame. 2338 */ 2339 uint8_t * 2340 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 2341 { 2342 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2343 2344 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 2345 2346 *frm++ = IEEE80211_ELEMID_MESHID; 2347 *frm++ = ms->ms_idlen; 2348 memcpy(frm, ms->ms_id, ms->ms_idlen); 2349 return frm + ms->ms_idlen; 2350 } 2351 2352 /* 2353 * Add a Mesh Configuration IE to a frame. 2354 * For now just use HWMP routing, Airtime link metric, Null Congestion 2355 * Signaling, Null Sync Protocol and Null Authentication. 2356 */ 2357 uint8_t * 2358 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 2359 { 2360 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 2361 uint16_t caps; 2362 2363 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 2364 2365 *frm++ = IEEE80211_ELEMID_MESHCONF; 2366 *frm++ = sizeof(struct ieee80211_meshconf_ie) - 2; 2367 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 2368 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 2369 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 2370 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 2371 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 2372 /* NB: set the number of neighbors before the rest */ 2373 *frm = (ms->ms_neighbors > 15 ? 15 : ms->ms_neighbors) << 1; 2374 if (ms->ms_flags & IEEE80211_MESHFLAGS_PORTAL) 2375 *frm |= IEEE80211_MESHCONF_FORM_MP; 2376 frm += 1; 2377 caps = 0; 2378 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 2379 caps |= IEEE80211_MESHCONF_CAP_AP; 2380 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 2381 caps |= IEEE80211_MESHCONF_CAP_FWRD; 2382 ADDSHORT(frm, caps); 2383 return frm; 2384 } 2385 2386 /* 2387 * Add a Mesh Peer Management IE to a frame. 2388 */ 2389 uint8_t * 2390 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 2391 uint16_t peerid, uint16_t reason) 2392 { 2393 /* XXX change for AH */ 2394 static const uint8_t meshpeerproto[4] = IEEE80211_MESH_PEER_PROTO; 2395 2396 KASSERT(localid != 0, ("localid == 0")); 2397 2398 *frm++ = IEEE80211_ELEMID_MESHPEER; 2399 switch (subtype) { 2400 case IEEE80211_MESH_PEER_LINK_OPEN: 2401 *frm++ = 6; /* length */ 2402 memcpy(frm, meshpeerproto, 4); 2403 frm += 4; 2404 ADDSHORT(frm, localid); /* local ID */ 2405 break; 2406 case IEEE80211_MESH_PEER_LINK_CONFIRM: 2407 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 2408 *frm++ = 8; /* length */ 2409 memcpy(frm, meshpeerproto, 4); 2410 frm += 4; 2411 ADDSHORT(frm, localid); /* local ID */ 2412 ADDSHORT(frm, peerid); /* peer ID */ 2413 break; 2414 case IEEE80211_MESH_PEER_LINK_CLOSE: 2415 if (peerid) 2416 *frm++ = 10; /* length */ 2417 else 2418 *frm++ = 8; /* length */ 2419 memcpy(frm, meshpeerproto, 4); 2420 frm += 4; 2421 ADDSHORT(frm, localid); /* local ID */ 2422 if (peerid) 2423 ADDSHORT(frm, peerid); /* peer ID */ 2424 ADDSHORT(frm, reason); 2425 break; 2426 } 2427 return frm; 2428 } 2429 2430 /* 2431 * Compute an Airtime Link Metric for the link with this node. 2432 * 2433 * Based on Draft 3.0 spec (11B.10, p.149). 2434 */ 2435 /* 2436 * Max 802.11s overhead. 2437 */ 2438 #define IEEE80211_MESH_MAXOVERHEAD \ 2439 (sizeof(struct ieee80211_qosframe_addr4) \ 2440 + sizeof(struct ieee80211_meshcntl_ae11) \ 2441 + sizeof(struct llc) \ 2442 + IEEE80211_ADDR_LEN \ 2443 + IEEE80211_WEP_IVLEN \ 2444 + IEEE80211_WEP_KIDLEN \ 2445 + IEEE80211_WEP_CRCLEN \ 2446 + IEEE80211_WEP_MICLEN \ 2447 + IEEE80211_CRC_LEN) 2448 uint32_t 2449 mesh_airtime_calc(struct ieee80211_node *ni) 2450 { 2451 #define M_BITS 8 2452 #define S_FACTOR (2 * M_BITS) 2453 struct ieee80211com *ic = ni->ni_ic; 2454 struct ifnet *ifp = ni->ni_vap->iv_ifp; 2455 static const int nbits = 8192 << M_BITS; 2456 uint32_t overhead, rate, errrate; 2457 uint64_t res; 2458 2459 /* Time to transmit a frame */ 2460 rate = ni->ni_txrate; 2461 overhead = ieee80211_compute_duration(ic->ic_rt, 2462 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 2463 /* Error rate in percentage */ 2464 /* XXX assuming small failures are ok */ 2465 errrate = (((ifp->if_oerrors + 2466 ifp->if_ierrors) / 100) << M_BITS) / 100; 2467 res = (overhead + (nbits / rate)) * 2468 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 2469 2470 return (uint32_t)(res >> S_FACTOR); 2471 #undef M_BITS 2472 #undef S_FACTOR 2473 } 2474 2475 /* 2476 * Add a Mesh Link Metric report IE to a frame. 2477 */ 2478 uint8_t * 2479 ieee80211_add_meshlmetric(uint8_t *frm, uint32_t metric) 2480 { 2481 *frm++ = IEEE80211_ELEMID_MESHLINK; 2482 *frm++ = 4; 2483 ADDWORD(frm, metric); 2484 return frm; 2485 } 2486 #undef ADDSHORT 2487 #undef ADDWORD 2488 2489 /* 2490 * Initialize any mesh-specific node state. 2491 */ 2492 void 2493 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 2494 { 2495 ni->ni_flags |= IEEE80211_NODE_QOS; 2496 callout_init_mp(&ni->ni_mltimer); 2497 } 2498 2499 /* 2500 * Cleanup any mesh-specific node state. 2501 */ 2502 void 2503 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 2504 { 2505 struct ieee80211vap *vap = ni->ni_vap; 2506 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2507 2508 callout_stop(&ni->ni_mltimer); 2509 /* NB: short-circuit callbacks after mesh_vdetach */ 2510 if (vap->iv_mesh != NULL) 2511 ms->ms_ppath->mpp_peerdown(ni); 2512 } 2513 2514 void 2515 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 2516 { 2517 ni->ni_meshidlen = ie[1]; 2518 memcpy(ni->ni_meshid, ie + 2, ie[1]); 2519 } 2520 2521 /* 2522 * Setup mesh-specific node state on neighbor discovery. 2523 */ 2524 void 2525 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 2526 const struct ieee80211_frame *wh, 2527 const struct ieee80211_scanparams *sp) 2528 { 2529 ieee80211_parse_meshid(ni, sp->meshid); 2530 } 2531 2532 void 2533 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 2534 struct ieee80211_beacon_offsets *bo) 2535 { 2536 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 2537 2538 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 2539 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 2540 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 2541 } 2542 } 2543 2544 static int 2545 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 2546 { 2547 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2548 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 2549 struct ieee80211_mesh_route *rt; 2550 struct ieee80211req_mesh_route *imr; 2551 size_t len, off; 2552 uint8_t *p; 2553 int error; 2554 2555 if (vap->iv_opmode != IEEE80211_M_MBSS) 2556 return ENOSYS; 2557 2558 error = 0; 2559 switch (ireq->i_type) { 2560 case IEEE80211_IOC_MESH_ID: 2561 ireq->i_len = ms->ms_idlen; 2562 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 2563 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 2564 break; 2565 case IEEE80211_IOC_MESH_AP: 2566 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 2567 break; 2568 case IEEE80211_IOC_MESH_FWRD: 2569 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 2570 break; 2571 case IEEE80211_IOC_MESH_TTL: 2572 ireq->i_val = ms->ms_ttl; 2573 break; 2574 case IEEE80211_IOC_MESH_RTCMD: 2575 switch (ireq->i_val) { 2576 case IEEE80211_MESH_RTCMD_LIST: 2577 len = 0; 2578 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 2579 len += sizeof(*imr); 2580 } 2581 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 2582 ireq->i_len = len; 2583 return ENOMEM; 2584 } 2585 ireq->i_len = len; 2586 /* XXX M_WAIT? */ 2587 p = kmalloc(len, M_TEMP, M_INTWAIT | M_ZERO); 2588 if (p == NULL) 2589 return ENOMEM; 2590 off = 0; 2591 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 2592 if (off >= len) 2593 break; 2594 imr = (struct ieee80211req_mesh_route *) 2595 (p + off); 2596 imr->imr_flags = rt->rt_flags; 2597 IEEE80211_ADDR_COPY(imr->imr_dest, 2598 rt->rt_dest); 2599 IEEE80211_ADDR_COPY(imr->imr_nexthop, 2600 rt->rt_nexthop); 2601 imr->imr_metric = rt->rt_metric; 2602 imr->imr_nhops = rt->rt_nhops; 2603 imr->imr_lifetime = rt->rt_lifetime; 2604 imr->imr_lastmseq = rt->rt_lastmseq; 2605 off += sizeof(*imr); 2606 } 2607 error = copyout(p, (uint8_t *)ireq->i_data, 2608 ireq->i_len); 2609 kfree(p, M_TEMP); 2610 break; 2611 case IEEE80211_MESH_RTCMD_FLUSH: 2612 case IEEE80211_MESH_RTCMD_ADD: 2613 case IEEE80211_MESH_RTCMD_DELETE: 2614 return EINVAL; 2615 default: 2616 return ENOSYS; 2617 } 2618 break; 2619 case IEEE80211_IOC_MESH_PR_METRIC: 2620 len = strlen(ms->ms_pmetric->mpm_descr); 2621 if (ireq->i_len < len) 2622 return EINVAL; 2623 ireq->i_len = len; 2624 error = copyout(ms->ms_pmetric->mpm_descr, 2625 (uint8_t *)ireq->i_data, len); 2626 break; 2627 case IEEE80211_IOC_MESH_PR_PATH: 2628 len = strlen(ms->ms_ppath->mpp_descr); 2629 if (ireq->i_len < len) 2630 return EINVAL; 2631 ireq->i_len = len; 2632 error = copyout(ms->ms_ppath->mpp_descr, 2633 (uint8_t *)ireq->i_data, len); 2634 break; 2635 default: 2636 return ENOSYS; 2637 } 2638 2639 return error; 2640 } 2641 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 2642 2643 static int 2644 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 2645 { 2646 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2647 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 2648 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 2649 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 2650 int error; 2651 2652 if (vap->iv_opmode != IEEE80211_M_MBSS) 2653 return ENOSYS; 2654 2655 error = 0; 2656 switch (ireq->i_type) { 2657 case IEEE80211_IOC_MESH_ID: 2658 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 2659 return EINVAL; 2660 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 2661 if (error != 0) 2662 break; 2663 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 2664 ms->ms_idlen = ireq->i_len; 2665 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 2666 error = ENETRESET; 2667 break; 2668 case IEEE80211_IOC_MESH_AP: 2669 if (ireq->i_val) 2670 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 2671 else 2672 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 2673 error = ENETRESET; 2674 break; 2675 case IEEE80211_IOC_MESH_FWRD: 2676 if (ireq->i_val) 2677 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 2678 else 2679 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 2680 break; 2681 case IEEE80211_IOC_MESH_TTL: 2682 ms->ms_ttl = (uint8_t) ireq->i_val; 2683 break; 2684 case IEEE80211_IOC_MESH_RTCMD: 2685 switch (ireq->i_val) { 2686 case IEEE80211_MESH_RTCMD_LIST: 2687 return EINVAL; 2688 case IEEE80211_MESH_RTCMD_FLUSH: 2689 ieee80211_mesh_rt_flush(vap); 2690 break; 2691 case IEEE80211_MESH_RTCMD_ADD: 2692 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 2693 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 2694 return EINVAL; 2695 error = copyin(ireq->i_data, &tmpaddr, 2696 IEEE80211_ADDR_LEN); 2697 if (error == 0) 2698 ieee80211_mesh_discover(vap, tmpaddr, NULL); 2699 break; 2700 case IEEE80211_MESH_RTCMD_DELETE: 2701 ieee80211_mesh_rt_del(vap, ireq->i_data); 2702 break; 2703 default: 2704 return ENOSYS; 2705 } 2706 break; 2707 case IEEE80211_IOC_MESH_PR_METRIC: 2708 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 2709 if (error == 0) { 2710 error = mesh_select_proto_metric(vap, tmpproto); 2711 if (error == 0) 2712 error = ENETRESET; 2713 } 2714 break; 2715 case IEEE80211_IOC_MESH_PR_PATH: 2716 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 2717 if (error == 0) { 2718 error = mesh_select_proto_path(vap, tmpproto); 2719 if (error == 0) 2720 error = ENETRESET; 2721 } 2722 break; 2723 default: 2724 return ENOSYS; 2725 } 2726 return error; 2727 } 2728 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 2729