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 * $DragonFly$ 31 */ 32 33 /* 34 * IEEE 802.11s Mesh Point (MBSS) support. 35 * 36 * Based on March 2009, D3.0 802.11s draft spec. 37 */ 38 #include "opt_inet.h" 39 #include "opt_wlan.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/mbuf.h> 44 #include <sys/malloc.h> 45 #include <sys/kernel.h> 46 47 #include <sys/socket.h> 48 #include <sys/sockio.h> 49 #include <sys/endian.h> 50 #include <sys/errno.h> 51 #include <sys/proc.h> 52 #include <sys/sysctl.h> 53 54 #include <net/if.h> 55 #include <net/if_media.h> 56 #include <net/if_llc.h> 57 #include <net/ethernet.h> 58 #include <net/route.h> 59 60 #include <netproto/802_11/ieee80211_var.h> 61 #include <netproto/802_11/ieee80211_action.h> 62 #include <netproto/802_11/ieee80211_input.h> 63 #include <netproto/802_11/ieee80211_mesh.h> 64 65 static void mesh_rt_flush_invalid(struct ieee80211vap *); 66 static int mesh_select_proto_path(struct ieee80211vap *, const char *); 67 static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 68 static void mesh_vattach(struct ieee80211vap *); 69 static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 70 static void mesh_rt_cleanup_callout(void *); 71 static void mesh_linkchange(struct ieee80211_node *, 72 enum ieee80211_mesh_mlstate); 73 static void mesh_checkid(void *, struct ieee80211_node *); 74 static uint32_t mesh_generateid(struct ieee80211vap *); 75 static int mesh_checkpseq(struct ieee80211vap *, 76 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 77 static struct ieee80211_node * 78 mesh_find_txnode(struct ieee80211vap *, 79 const uint8_t [IEEE80211_ADDR_LEN]); 80 static void mesh_forward(struct ieee80211vap *, struct mbuf *, 81 const struct ieee80211_meshcntl *); 82 static int mesh_input(struct ieee80211_node *, struct mbuf *, int, int); 83 static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 84 int, int); 85 static void mesh_peer_timeout_setup(struct ieee80211_node *); 86 static void mesh_peer_timeout_backoff(struct ieee80211_node *); 87 static void mesh_peer_timeout_callout(void *); 88 static __inline void 89 mesh_peer_timeout_stop(struct ieee80211_node *); 90 static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 91 static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 92 static int mesh_verify_meshpeer(struct ieee80211vap *, uint8_t, 93 const uint8_t *); 94 uint32_t mesh_airtime_calc(struct ieee80211_node *); 95 96 /* 97 * Timeout values come from the specification and are in milliseconds. 98 */ 99 SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 100 "IEEE 802.11s parameters"); 101 static int ieee80211_mesh_retrytimeout = -1; 102 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW, 103 &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 104 "Retry timeout (msec)"); 105 static int ieee80211_mesh_holdingtimeout = -1; 106 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW, 107 &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 108 "Holding state timeout (msec)"); 109 static int ieee80211_mesh_confirmtimeout = -1; 110 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW, 111 &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 112 "Confirm state timeout (msec)"); 113 static int ieee80211_mesh_maxretries = 2; 114 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW, 115 &ieee80211_mesh_maxretries, 0, 116 "Maximum retries during peer link establishment"); 117 118 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 119 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 120 121 static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 122 static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 123 static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 124 static ieee80211_recv_action_func mesh_recv_action_meshlmetric_req; 125 static ieee80211_recv_action_func mesh_recv_action_meshlmetric_rep; 126 127 static ieee80211_send_action_func mesh_send_action_meshpeering_open; 128 static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 129 static ieee80211_send_action_func mesh_send_action_meshpeering_close; 130 static ieee80211_send_action_func mesh_send_action_meshlink_request; 131 static ieee80211_send_action_func mesh_send_action_meshlink_reply; 132 133 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 134 .mpm_descr = "AIRTIME", 135 .mpm_ie = IEEE80211_MESHCONF_METRIC_AIRTIME, 136 .mpm_metric = mesh_airtime_calc, 137 }; 138 139 static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 140 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 141 142 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh", "802.11s routing table"); 143 144 /* 145 * Helper functions to manipulate the Mesh routing table. 146 */ 147 148 static struct ieee80211_mesh_route * 149 mesh_rt_find_locked(struct ieee80211_mesh_state *ms, 150 const uint8_t dest[IEEE80211_ADDR_LEN]) 151 { 152 struct ieee80211_mesh_route *rt; 153 154 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 155 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) 156 return rt; 157 } 158 return NULL; 159 } 160 161 static struct ieee80211_mesh_route * 162 mesh_rt_add_locked(struct ieee80211_mesh_state *ms, 163 const uint8_t dest[IEEE80211_ADDR_LEN]) 164 { 165 struct ieee80211_mesh_route *rt; 166 167 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 168 ("%s: adding broadcast to the routing table", __func__)); 169 170 rt = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_route)) + 171 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_INTWAIT | M_ZERO); 172 if (rt != NULL) { 173 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 174 rt->rt_priv = (void *)ALIGN(&rt[1]); 175 rt->rt_crtime = ticks; 176 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 177 } 178 return rt; 179 } 180 181 struct ieee80211_mesh_route * 182 ieee80211_mesh_rt_find(struct ieee80211vap *vap, 183 const uint8_t dest[IEEE80211_ADDR_LEN]) 184 { 185 struct ieee80211_mesh_state *ms = vap->iv_mesh; 186 struct ieee80211_mesh_route *rt; 187 188 rt = mesh_rt_find_locked(ms, dest); 189 return rt; 190 } 191 192 struct ieee80211_mesh_route * 193 ieee80211_mesh_rt_add(struct ieee80211vap *vap, 194 const uint8_t dest[IEEE80211_ADDR_LEN]) 195 { 196 struct ieee80211_mesh_state *ms = vap->iv_mesh; 197 struct ieee80211_mesh_route *rt; 198 199 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 200 ("%s: duplicate entry in the routing table", __func__)); 201 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 202 ("%s: adding self to the routing table", __func__)); 203 204 rt = mesh_rt_add_locked(ms, dest); 205 return rt; 206 } 207 208 /* 209 * Add a proxy route (as needed) for the specified destination. 210 */ 211 void 212 ieee80211_mesh_proxy_check(struct ieee80211vap *vap, 213 const uint8_t dest[IEEE80211_ADDR_LEN]) 214 { 215 struct ieee80211_mesh_state *ms = vap->iv_mesh; 216 struct ieee80211_mesh_route *rt; 217 218 rt = mesh_rt_find_locked(ms, dest); 219 if (rt == NULL) { 220 rt = mesh_rt_add_locked(ms, dest); 221 if (rt == NULL) { 222 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 223 "%s", "unable to add proxy entry"); 224 vap->iv_stats.is_mesh_rtaddfailed++; 225 } else { 226 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 227 "%s", "add proxy entry"); 228 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 229 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 230 | IEEE80211_MESHRT_FLAGS_PROXY; 231 } 232 /* XXX assert PROXY? */ 233 } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 234 struct ieee80211com *ic = vap->iv_ic; 235 /* 236 * Fix existing entry created by received frames from 237 * stations that have some memory of dest. We also 238 * flush any frames held on the staging queue; delivering 239 * them is too much trouble right now. 240 */ 241 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 242 "%s", "fix proxy entry"); 243 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr); 244 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID 245 | IEEE80211_MESHRT_FLAGS_PROXY; 246 /* XXX belongs in hwmp */ 247 ieee80211_ageq_drain_node(&ic->ic_stageq, 248 (void *)(uintptr_t) ieee80211_mac_hash(ic, dest)); 249 /* XXX stat? */ 250 } 251 } 252 253 static __inline void 254 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt) 255 { 256 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 257 kfree(rt, M_80211_MESH_RT); 258 } 259 260 void 261 ieee80211_mesh_rt_del(struct ieee80211vap *vap, 262 const uint8_t dest[IEEE80211_ADDR_LEN]) 263 { 264 struct ieee80211_mesh_state *ms = vap->iv_mesh; 265 struct ieee80211_mesh_route *rt, *next; 266 267 TAILQ_FOREACH_MUTABLE(rt, &ms->ms_routes, rt_next, next) { 268 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 269 mesh_rt_del(ms, rt); 270 return; 271 } 272 } 273 } 274 275 void 276 ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 277 { 278 struct ieee80211_mesh_state *ms = vap->iv_mesh; 279 struct ieee80211_mesh_route *rt, *next; 280 281 if (ms == NULL) 282 return; 283 TAILQ_FOREACH_MUTABLE(rt, &ms->ms_routes, rt_next, next) 284 mesh_rt_del(ms, rt); 285 } 286 287 void 288 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap, 289 const uint8_t peer[IEEE80211_ADDR_LEN]) 290 { 291 struct ieee80211_mesh_state *ms = vap->iv_mesh; 292 struct ieee80211_mesh_route *rt, *next; 293 294 TAILQ_FOREACH_MUTABLE(rt, &ms->ms_routes, rt_next, next) { 295 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer)) 296 mesh_rt_del(ms, rt); 297 } 298 } 299 300 /* 301 * Flush expired routing entries, i.e. those in invalid state for 302 * some time. 303 */ 304 static void 305 mesh_rt_flush_invalid(struct ieee80211vap *vap) 306 { 307 struct ieee80211_mesh_state *ms = vap->iv_mesh; 308 struct ieee80211_mesh_route *rt, *next; 309 310 if (ms == NULL) 311 return; 312 TAILQ_FOREACH_MUTABLE(rt, &ms->ms_routes, rt_next, next) { 313 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 && 314 ticks - rt->rt_crtime >= ms->ms_ppath->mpp_inact) 315 mesh_rt_del(ms, rt); 316 } 317 } 318 319 int 320 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 321 { 322 int i, firstempty = -1; 323 324 for (i = 0; i < NELEM(mesh_proto_paths); i++) { 325 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr, 326 IEEE80211_MESH_PROTO_DSZ) == 0) 327 return EEXIST; 328 if (!mesh_proto_paths[i].mpp_active && firstempty == -1) 329 firstempty = i; 330 } 331 if (firstempty < 0) 332 return ENOSPC; 333 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 334 mesh_proto_paths[firstempty].mpp_active = 1; 335 return 0; 336 } 337 338 int 339 ieee80211_mesh_register_proto_metric(const struct 340 ieee80211_mesh_proto_metric *mpm) 341 { 342 int i, firstempty = -1; 343 344 for (i = 0; i < NELEM(mesh_proto_metrics); i++) { 345 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr, 346 IEEE80211_MESH_PROTO_DSZ) == 0) 347 return EEXIST; 348 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1) 349 firstempty = i; 350 } 351 if (firstempty < 0) 352 return ENOSPC; 353 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 354 mesh_proto_metrics[firstempty].mpm_active = 1; 355 return 0; 356 } 357 358 static int 359 mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 360 { 361 struct ieee80211_mesh_state *ms = vap->iv_mesh; 362 int i; 363 364 for (i = 0; i < NELEM(mesh_proto_paths); i++) { 365 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 366 ms->ms_ppath = &mesh_proto_paths[i]; 367 return 0; 368 } 369 } 370 return ENOENT; 371 } 372 373 static int 374 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 375 { 376 struct ieee80211_mesh_state *ms = vap->iv_mesh; 377 int i; 378 379 for (i = 0; i < NELEM(mesh_proto_metrics); i++) { 380 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 381 ms->ms_pmetric = &mesh_proto_metrics[i]; 382 return 0; 383 } 384 } 385 return ENOENT; 386 } 387 388 static void 389 ieee80211_mesh_init(void) 390 { 391 392 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 393 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 394 395 /* 396 * Setup mesh parameters that depends on the clock frequency. 397 */ 398 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 399 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 400 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 401 402 /* 403 * Register action frame handlers. 404 */ 405 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 406 IEEE80211_ACTION_MESHPEERING_OPEN, 407 mesh_recv_action_meshpeering_open); 408 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 409 IEEE80211_ACTION_MESHPEERING_CONFIRM, 410 mesh_recv_action_meshpeering_confirm); 411 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 412 IEEE80211_ACTION_MESHPEERING_CLOSE, 413 mesh_recv_action_meshpeering_close); 414 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC, 415 IEEE80211_ACTION_MESHLMETRIC_REQ, mesh_recv_action_meshlmetric_req); 416 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC, 417 IEEE80211_ACTION_MESHLMETRIC_REP, mesh_recv_action_meshlmetric_rep); 418 419 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 420 IEEE80211_ACTION_MESHPEERING_OPEN, 421 mesh_send_action_meshpeering_open); 422 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 423 IEEE80211_ACTION_MESHPEERING_CONFIRM, 424 mesh_send_action_meshpeering_confirm); 425 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 426 IEEE80211_ACTION_MESHPEERING_CLOSE, 427 mesh_send_action_meshpeering_close); 428 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC, 429 IEEE80211_ACTION_MESHLMETRIC_REQ, 430 mesh_send_action_meshlink_request); 431 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC, 432 IEEE80211_ACTION_MESHLMETRIC_REP, 433 mesh_send_action_meshlink_reply); 434 435 /* 436 * Register Airtime Link Metric. 437 */ 438 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 439 440 } 441 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 442 443 void 444 ieee80211_mesh_attach(struct ieee80211com *ic) 445 { 446 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 447 } 448 449 void 450 ieee80211_mesh_detach(struct ieee80211com *ic) 451 { 452 } 453 454 static void 455 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 456 { 457 struct ieee80211com *ic = ni->ni_ic; 458 uint16_t args[3]; 459 460 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 461 args[0] = ni->ni_mlpid; 462 args[1] = ni->ni_mllid; 463 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 464 ieee80211_send_action(ni, 465 IEEE80211_ACTION_CAT_MESHPEERING, 466 IEEE80211_ACTION_MESHPEERING_CLOSE, 467 args); 468 } 469 callout_stop(&ni->ni_mltimer); 470 /* XXX belongs in hwmp */ 471 ieee80211_ageq_drain_node(&ic->ic_stageq, 472 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 473 } 474 475 static void 476 mesh_vdetach(struct ieee80211vap *vap) 477 { 478 struct ieee80211_mesh_state *ms = vap->iv_mesh; 479 480 callout_stop(&ms->ms_cleantimer); 481 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 482 NULL); 483 ieee80211_mesh_rt_flush(vap); 484 ms->ms_ppath->mpp_vdetach(vap); 485 kfree(vap->iv_mesh, M_80211_VAP); 486 vap->iv_mesh = NULL; 487 } 488 489 static void 490 mesh_vattach(struct ieee80211vap *vap) 491 { 492 struct ieee80211_mesh_state *ms; 493 vap->iv_newstate = mesh_newstate; 494 vap->iv_input = mesh_input; 495 vap->iv_opdetach = mesh_vdetach; 496 vap->iv_recv_mgmt = mesh_recv_mgmt; 497 ms = kmalloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 498 M_INTWAIT | M_ZERO); 499 if (ms == NULL) { 500 kprintf("%s: couldn't alloc MBSS state\n", __func__); 501 return; 502 } 503 vap->iv_mesh = ms; 504 ms->ms_seq = 0; 505 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 506 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 507 TAILQ_INIT(&ms->ms_routes); 508 callout_init_mp(&ms->ms_cleantimer); 509 mesh_select_proto_metric(vap, "AIRTIME"); 510 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 511 mesh_select_proto_path(vap, "HWMP"); 512 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 513 ms->ms_ppath->mpp_vattach(vap); 514 } 515 516 /* 517 * IEEE80211_M_MBSS vap state machine handler. 518 */ 519 static int 520 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 521 { 522 struct ieee80211_mesh_state *ms = vap->iv_mesh; 523 struct ieee80211com *ic = vap->iv_ic; 524 struct ieee80211_node *ni; 525 enum ieee80211_state ostate; 526 527 ostate = vap->iv_state; 528 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 529 __func__, ieee80211_state_name[ostate], 530 ieee80211_state_name[nstate], arg); 531 vap->iv_state = nstate; /* state transition */ 532 if (ostate != IEEE80211_S_SCAN) 533 ieee80211_cancel_scan(vap); /* background scan */ 534 ni = vap->iv_bss; /* NB: no reference held */ 535 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) 536 callout_stop(&ms->ms_cleantimer); 537 switch (nstate) { 538 case IEEE80211_S_INIT: 539 switch (ostate) { 540 case IEEE80211_S_SCAN: 541 ieee80211_cancel_scan(vap); 542 break; 543 case IEEE80211_S_CAC: 544 ieee80211_dfs_cac_stop(vap); 545 break; 546 case IEEE80211_S_RUN: 547 ieee80211_iterate_nodes(&ic->ic_sta, 548 mesh_vdetach_peers, NULL); 549 break; 550 default: 551 break; 552 } 553 if (ostate != IEEE80211_S_INIT) { 554 /* NB: optimize INIT -> INIT case */ 555 ieee80211_reset_bss(vap); 556 ieee80211_mesh_rt_flush(vap); 557 } 558 break; 559 case IEEE80211_S_SCAN: 560 switch (ostate) { 561 case IEEE80211_S_INIT: 562 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 563 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 564 ms->ms_idlen != 0) { 565 /* 566 * Already have a channel and a mesh ID; bypass 567 * the scan and startup immediately. 568 */ 569 ieee80211_create_ibss(vap, vap->iv_des_chan); 570 break; 571 } 572 /* 573 * Initiate a scan. We can come here as a result 574 * of an IEEE80211_IOC_SCAN_REQ too in which case 575 * the vap will be marked with IEEE80211_FEXT_SCANREQ 576 * and the scan request parameters will be present 577 * in iv_scanreq. Otherwise we do the default. 578 */ 579 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 580 ieee80211_check_scan(vap, 581 vap->iv_scanreq_flags, 582 vap->iv_scanreq_duration, 583 vap->iv_scanreq_mindwell, 584 vap->iv_scanreq_maxdwell, 585 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 586 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 587 } else 588 ieee80211_check_scan_current(vap); 589 break; 590 default: 591 break; 592 } 593 break; 594 case IEEE80211_S_CAC: 595 /* 596 * Start CAC on a DFS channel. We come here when starting 597 * a bss on a DFS channel (see ieee80211_create_ibss). 598 */ 599 ieee80211_dfs_cac_start(vap); 600 break; 601 case IEEE80211_S_RUN: 602 switch (ostate) { 603 case IEEE80211_S_INIT: 604 /* 605 * Already have a channel; bypass the 606 * scan and startup immediately. 607 * Note that ieee80211_create_ibss will call 608 * back to do a RUN->RUN state change. 609 */ 610 ieee80211_create_ibss(vap, 611 ieee80211_ht_adjust_channel(ic, 612 ic->ic_curchan, vap->iv_flags_ht)); 613 /* NB: iv_bss is changed on return */ 614 break; 615 case IEEE80211_S_CAC: 616 /* 617 * NB: This is the normal state change when CAC 618 * expires and no radar was detected; no need to 619 * clear the CAC timer as it's already expired. 620 */ 621 /* fall thru... */ 622 case IEEE80211_S_CSA: 623 #if 0 624 /* 625 * Shorten inactivity timer of associated stations 626 * to weed out sta's that don't follow a CSA. 627 */ 628 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 629 #endif 630 /* 631 * Update bss node channel to reflect where 632 * we landed after CSA. 633 */ 634 ieee80211_node_set_chan(vap->iv_bss, 635 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 636 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 637 /* XXX bypass debug msgs */ 638 break; 639 case IEEE80211_S_SCAN: 640 case IEEE80211_S_RUN: 641 #ifdef IEEE80211_DEBUG 642 if (ieee80211_msg_debug(vap)) { 643 struct ieee80211_node *ni = vap->iv_bss; 644 ieee80211_note(vap, 645 "synchronized with %6D meshid ", 646 ni->ni_meshid, ":"); 647 ieee80211_print_essid(ni->ni_meshid, 648 ni->ni_meshidlen); 649 /* XXX MCS/HT */ 650 kprintf(" channel %d\n", 651 ieee80211_chan2ieee(ic, ic->ic_curchan)); 652 } 653 #endif 654 break; 655 default: 656 break; 657 } 658 ieee80211_node_authorize(vap->iv_bss); 659 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 660 mesh_rt_cleanup_callout, vap); 661 break; 662 default: 663 break; 664 } 665 /* NB: ostate not nstate */ 666 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 667 return 0; 668 } 669 670 static void 671 mesh_rt_cleanup_callout(void *arg) 672 { 673 struct ieee80211vap *vap = arg; 674 struct ieee80211_mesh_state *ms = vap->iv_mesh; 675 676 wlan_serialize_enter(); 677 mesh_rt_flush_invalid(vap); 678 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact, 679 mesh_rt_cleanup_callout, vap); 680 wlan_serialize_exit(); 681 } 682 683 684 /* 685 * Helper function to note the Mesh Peer Link FSM change. 686 */ 687 static void 688 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 689 { 690 struct ieee80211vap *vap = ni->ni_vap; 691 struct ieee80211_mesh_state *ms = vap->iv_mesh; 692 #ifdef IEEE80211_DEBUG 693 static const char *meshlinkstates[] = { 694 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 695 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 696 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 697 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 698 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 699 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 700 }; 701 #endif 702 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 703 ni, "peer link: %s -> %s", 704 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 705 706 /* track neighbor count */ 707 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 708 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 709 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 710 ms->ms_neighbors++; 711 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 712 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 713 state != IEEE80211_NODE_MESH_ESTABLISHED) { 714 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 715 ms->ms_neighbors--; 716 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF); 717 } 718 ni->ni_mlstate = state; 719 switch (state) { 720 case IEEE80211_NODE_MESH_HOLDING: 721 ms->ms_ppath->mpp_peerdown(ni); 722 break; 723 case IEEE80211_NODE_MESH_ESTABLISHED: 724 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL); 725 break; 726 default: 727 break; 728 } 729 } 730 731 /* 732 * Helper function to generate a unique local ID required for mesh 733 * peer establishment. 734 */ 735 static void 736 mesh_checkid(void *arg, struct ieee80211_node *ni) 737 { 738 uint16_t *r = arg; 739 740 if (*r == ni->ni_mllid) 741 *(uint16_t *)arg = 0; 742 } 743 744 static uint32_t 745 mesh_generateid(struct ieee80211vap *vap) 746 { 747 int maxiter = 4; 748 uint16_t r; 749 750 do { 751 get_random_bytes(&r, 2); 752 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 753 maxiter--; 754 } while (r == 0 && maxiter > 0); 755 return r; 756 } 757 758 /* 759 * Verifies if we already received this packet by checking its 760 * sequence number. 761 * Returns 0 if the frame is to be accepted, 1 otherwise. 762 */ 763 static int 764 mesh_checkpseq(struct ieee80211vap *vap, 765 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 766 { 767 struct ieee80211_mesh_route *rt; 768 769 rt = ieee80211_mesh_rt_find(vap, source); 770 if (rt == NULL) { 771 rt = ieee80211_mesh_rt_add(vap, source); 772 if (rt == NULL) { 773 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 774 "%s", "add mcast route failed"); 775 vap->iv_stats.is_mesh_rtaddfailed++; 776 return 1; 777 } 778 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source, 779 "add mcast route, mesh seqno %d", seq); 780 rt->rt_lastmseq = seq; 781 return 0; 782 } 783 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 784 return 1; 785 } else { 786 rt->rt_lastmseq = seq; 787 return 0; 788 } 789 } 790 791 /* 792 * Iterate the routing table and locate the next hop. 793 */ 794 static struct ieee80211_node * 795 mesh_find_txnode(struct ieee80211vap *vap, 796 const uint8_t dest[IEEE80211_ADDR_LEN]) 797 { 798 struct ieee80211_mesh_route *rt; 799 800 rt = ieee80211_mesh_rt_find(vap, dest); 801 if (rt == NULL) 802 return NULL; 803 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 || 804 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) { 805 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest, 806 "%s: !valid or proxy, flags 0x%x", __func__, rt->rt_flags); 807 /* XXX stat */ 808 return NULL; 809 } 810 return ieee80211_find_txnode(vap, rt->rt_nexthop); 811 } 812 813 /* 814 * Forward the specified frame. 815 * Decrement the TTL and set TA to our MAC address. 816 */ 817 static void 818 mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 819 const struct ieee80211_meshcntl *mc) 820 { 821 struct ieee80211com *ic = vap->iv_ic; 822 struct ieee80211_mesh_state *ms = vap->iv_mesh; 823 struct ifnet *ifp = vap->iv_ifp; 824 struct ifnet *parent = ic->ic_ifp; 825 const struct ieee80211_frame *wh = 826 mtod(m, const struct ieee80211_frame *); 827 struct mbuf *mcopy; 828 struct ieee80211_meshcntl *mccopy; 829 struct ieee80211_frame *whcopy; 830 struct ieee80211_node *ni; 831 int err; 832 833 if (mc->mc_ttl == 0) { 834 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 835 "%s", "frame not fwd'd, ttl 0"); 836 vap->iv_stats.is_mesh_fwd_ttl++; 837 return; 838 } 839 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 840 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 841 "%s", "frame not fwd'd, fwding disabled"); 842 vap->iv_stats.is_mesh_fwd_disabled++; 843 return; 844 } 845 mcopy = m_dup(m, MB_DONTWAIT); 846 if (mcopy == NULL) { 847 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 848 "%s", "frame not fwd'd, cannot dup"); 849 vap->iv_stats.is_mesh_fwd_nobuf++; 850 ifp->if_oerrors++; 851 return; 852 } 853 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 854 sizeof(struct ieee80211_meshcntl)); 855 if (mcopy == NULL) { 856 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 857 "%s", "frame not fwd'd, too short"); 858 vap->iv_stats.is_mesh_fwd_tooshort++; 859 ifp->if_oerrors++; 860 m_freem(mcopy); 861 return; 862 } 863 whcopy = mtod(mcopy, struct ieee80211_frame *); 864 mccopy = (struct ieee80211_meshcntl *) 865 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 866 /* XXX clear other bits? */ 867 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 868 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 869 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 870 ni = ieee80211_ref_node(vap->iv_bss); 871 mcopy->m_flags |= M_MCAST; 872 } else { 873 ni = mesh_find_txnode(vap, whcopy->i_addr3); 874 if (ni == NULL) { 875 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 876 "%s", "frame not fwd'd, no path"); 877 vap->iv_stats.is_mesh_fwd_nopath++; 878 m_freem(mcopy); 879 return; 880 } 881 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 882 } 883 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 884 mccopy->mc_ttl--; 885 886 /* XXX calculate priority so drivers can find the tx queue */ 887 M_WME_SETAC(mcopy, WME_AC_BE); 888 889 /* XXX do we know m_nextpkt is NULL? */ 890 mcopy->m_pkthdr.rcvif = (void *) ni; 891 err = ieee80211_handoff(parent, mcopy); 892 if (err != 0) { 893 /* NB: IFQ_HANDOFF reclaims mbuf */ 894 ieee80211_free_node(ni); 895 } else { 896 ifp->if_opackets++; 897 } 898 } 899 900 static struct mbuf * 901 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen) 902 { 903 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK) 904 uint8_t b[sizeof(struct ieee80211_qosframe_addr4) + 905 sizeof(struct ieee80211_meshcntl_ae11)]; 906 const struct ieee80211_qosframe_addr4 *wh; 907 const struct ieee80211_meshcntl_ae10 *mc; 908 struct ether_header *eh; 909 struct llc *llc; 910 int ae; 911 912 if (m->m_len < hdrlen + sizeof(*llc) && 913 (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) { 914 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY, 915 "discard data frame: %s", "m_pullup failed"); 916 vap->iv_stats.is_rx_tooshort++; 917 return NULL; 918 } 919 memcpy(b, mtod(m, caddr_t), hdrlen); 920 wh = (const struct ieee80211_qosframe_addr4 *)&b[0]; 921 mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen]; 922 KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS || 923 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS, 924 ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 925 926 llc = (struct llc *)(mtod(m, caddr_t) + hdrlen); 927 if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP && 928 llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 && 929 llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 && 930 !(llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) { 931 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh)); 932 llc = NULL; 933 } else { 934 m_adj(m, hdrlen - sizeof(*eh)); 935 } 936 eh = mtod(m, struct ether_header *); 937 ae = mc->mc_flags & 3; 938 if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) { 939 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1); 940 if (ae == 0) { 941 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3); 942 } else if (ae == 1) { 943 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr4); 944 } else { 945 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 946 (const struct ieee80211_frame *)wh, NULL, 947 "bad AE %d", ae); 948 vap->iv_stats.is_mesh_badae++; 949 m_freem(m); 950 return NULL; 951 } 952 } else { 953 if (ae == 0) { 954 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3); 955 IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4); 956 } else if (ae == 2) { 957 IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr4); 958 IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr5); 959 } else { 960 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 961 (const struct ieee80211_frame *)wh, NULL, 962 "bad AE %d", ae); 963 vap->iv_stats.is_mesh_badae++; 964 m_freem(m); 965 return NULL; 966 } 967 } 968 #ifdef ALIGNED_POINTER 969 if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) { 970 m = ieee80211_realign(vap, m, sizeof(*eh)); 971 if (m == NULL) 972 return NULL; 973 } 974 #endif /* ALIGNED_POINTER */ 975 if (llc != NULL) { 976 eh = mtod(m, struct ether_header *); 977 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh)); 978 } 979 return m; 980 #undef WDIR 981 } 982 983 /* 984 * Return non-zero if the unicast mesh data frame should be processed 985 * locally. Frames that are not proxy'd have our address, otherwise 986 * we need to consult the routing table to look for a proxy entry. 987 */ 988 static __inline int 989 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh, 990 const struct ieee80211_meshcntl *mc) 991 { 992 int ae = mc->mc_flags & 3; 993 994 KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS, 995 ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1])); 996 KASSERT(ae == 0 || ae == 2, ("bad AE %d", ae)); 997 if (ae == 2) { /* ucast w/ proxy */ 998 const struct ieee80211_meshcntl_ae10 *mc10 = 999 (const struct ieee80211_meshcntl_ae10 *) mc; 1000 struct ieee80211_mesh_route *rt = 1001 ieee80211_mesh_rt_find(vap, mc10->mc_addr4); 1002 /* check for proxy route to ourself */ 1003 return (rt != NULL && 1004 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)); 1005 } else /* ucast w/o proxy */ 1006 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 1007 } 1008 1009 static int 1010 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 1011 { 1012 #define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) 1013 #define HAS_SEQ(type) ((type & 0x4) == 0) 1014 struct ieee80211vap *vap = ni->ni_vap; 1015 struct ieee80211com *ic = ni->ni_ic; 1016 struct ifnet *ifp = vap->iv_ifp; 1017 struct ieee80211_frame *wh; 1018 const struct ieee80211_meshcntl *mc; 1019 int hdrspace, meshdrlen, need_tap; 1020 uint8_t dir, type, subtype, qos; 1021 uint32_t seq; 1022 uint8_t *addr; 1023 ieee80211_seq rxseq; 1024 1025 KASSERT(ni != NULL, ("null node")); 1026 ni->ni_inact = ni->ni_inact_reload; 1027 1028 need_tap = 1; /* mbuf need to be tapped. */ 1029 type = -1; /* undefined */ 1030 1031 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 1032 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1033 ni->ni_macaddr, NULL, 1034 "too short (1): len %u", m->m_pkthdr.len); 1035 vap->iv_stats.is_rx_tooshort++; 1036 goto out; 1037 } 1038 /* 1039 * Bit of a cheat here, we use a pointer for a 3-address 1040 * frame format but don't reference fields past outside 1041 * ieee80211_frame_min w/o first validating the data is 1042 * present. 1043 */ 1044 wh = mtod(m, struct ieee80211_frame *); 1045 1046 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 1047 IEEE80211_FC0_VERSION_0) { 1048 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1049 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 1050 vap->iv_stats.is_rx_badversion++; 1051 goto err; 1052 } 1053 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 1054 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 1055 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1056 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 1057 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 1058 ni->ni_noise = nf; 1059 if (HAS_SEQ(type)) { 1060 uint8_t tid = ieee80211_gettid(wh); 1061 1062 if (IEEE80211_QOS_HAS_SEQ(wh) && 1063 TID_TO_WME_AC(tid) >= WME_AC_VI) 1064 ic->ic_wme.wme_hipri_traffic++; 1065 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1066 if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && 1067 (wh->i_fc[1] & IEEE80211_FC1_RETRY) && 1068 SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { 1069 /* duplicate, discard */ 1070 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1071 wh->i_addr1, "duplicate", 1072 "seqno <%u,%u> fragno <%u,%u> tid %u", 1073 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 1074 ni->ni_rxseqs[tid] >> 1075 IEEE80211_SEQ_SEQ_SHIFT, 1076 rxseq & IEEE80211_SEQ_FRAG_MASK, 1077 ni->ni_rxseqs[tid] & 1078 IEEE80211_SEQ_FRAG_MASK, 1079 tid); 1080 vap->iv_stats.is_rx_dup++; 1081 IEEE80211_NODE_STAT(ni, rx_dup); 1082 goto out; 1083 } 1084 ni->ni_rxseqs[tid] = rxseq; 1085 } 1086 } 1087 #ifdef IEEE80211_DEBUG 1088 /* 1089 * It's easier, but too expensive, to simulate different mesh 1090 * topologies by consulting the ACL policy very early, so do this 1091 * only under DEBUG. 1092 * 1093 * NB: this check is also done upon peering link initiation. 1094 */ 1095 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh->i_addr2)) { 1096 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1097 wh, NULL, "%s", "disallowed by ACL"); 1098 vap->iv_stats.is_rx_acl++; 1099 goto out; 1100 } 1101 #endif 1102 switch (type) { 1103 case IEEE80211_FC0_TYPE_DATA: 1104 if (ni == vap->iv_bss) 1105 goto out; 1106 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 1107 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 1108 ni->ni_macaddr, NULL, 1109 "peer link not yet established (%d)", 1110 ni->ni_mlstate); 1111 vap->iv_stats.is_mesh_nolink++; 1112 goto out; 1113 } 1114 if (dir != IEEE80211_FC1_DIR_FROMDS && 1115 dir != IEEE80211_FC1_DIR_DSTODS) { 1116 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1117 wh, "data", "incorrect dir 0x%x", dir); 1118 vap->iv_stats.is_rx_wrongdir++; 1119 goto err; 1120 } 1121 /* pull up enough to get to the mesh control */ 1122 hdrspace = ieee80211_hdrspace(ic, wh); 1123 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 1124 (m = m_pullup(m, hdrspace + 1125 sizeof(struct ieee80211_meshcntl))) == NULL) { 1126 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1127 ni->ni_macaddr, NULL, 1128 "data too short: expecting %u", hdrspace); 1129 vap->iv_stats.is_rx_tooshort++; 1130 goto out; /* XXX */ 1131 } 1132 /* 1133 * Now calculate the full extent of the headers. Note 1134 * mesh_decap will pull up anything we didn't get 1135 * above when it strips the 802.11 headers. 1136 */ 1137 mc = (const struct ieee80211_meshcntl *) 1138 (mtod(m, const uint8_t *) + hdrspace); 1139 meshdrlen = sizeof(struct ieee80211_meshcntl) + 1140 (mc->mc_flags & 3) * IEEE80211_ADDR_LEN; 1141 hdrspace += meshdrlen; 1142 seq = LE_READ_4(mc->mc_seq); 1143 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1144 addr = wh->i_addr3; 1145 else 1146 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 1147 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 1148 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1149 addr, "data", "%s", "not to me"); 1150 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 1151 goto out; 1152 } 1153 if (mesh_checkpseq(vap, addr, seq) != 0) { 1154 vap->iv_stats.is_rx_dup++; 1155 goto out; 1156 } 1157 1158 /* 1159 * Potentially forward packet. See table s36 (p140) 1160 * for the rules. XXX tap fwd'd packets not for us? 1161 */ 1162 if (dir == IEEE80211_FC1_DIR_FROMDS || 1163 !mesh_isucastforme(vap, wh, mc)) { 1164 mesh_forward(vap, m, mc); 1165 if (dir == IEEE80211_FC1_DIR_DSTODS) 1166 goto out; 1167 /* NB: fall thru to deliver mcast frames locally */ 1168 } 1169 1170 /* 1171 * Save QoS bits for use below--before we strip the header. 1172 */ 1173 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 1174 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 1175 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 1176 ((struct ieee80211_qosframe *)wh)->i_qos[0]; 1177 } else 1178 qos = 0; 1179 /* 1180 * Next up, any fragmentation. 1181 */ 1182 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1183 m = ieee80211_defrag(ni, m, hdrspace); 1184 if (m == NULL) { 1185 /* Fragment dropped or frame not complete yet */ 1186 goto out; 1187 } 1188 } 1189 wh = NULL; /* no longer valid, catch any uses */ 1190 1191 if (ieee80211_radiotap_active_vap(vap)) 1192 ieee80211_radiotap_rx(vap, m); 1193 need_tap = 0; 1194 1195 /* 1196 * Finally, strip the 802.11 header. 1197 */ 1198 m = mesh_decap(vap, m, hdrspace, meshdrlen); 1199 if (m == NULL) { 1200 /* XXX mask bit to check for both */ 1201 /* don't count Null data frames as errors */ 1202 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 1203 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 1204 goto out; 1205 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 1206 ni->ni_macaddr, "data", "%s", "decap error"); 1207 vap->iv_stats.is_rx_decap++; 1208 IEEE80211_NODE_STAT(ni, rx_decap); 1209 goto err; 1210 } 1211 if (qos & IEEE80211_QOS_AMSDU) { 1212 m = ieee80211_decap_amsdu(ni, m); 1213 if (m == NULL) 1214 return IEEE80211_FC0_TYPE_DATA; 1215 } 1216 ieee80211_deliver_data(vap, ni, m); 1217 return type; 1218 case IEEE80211_FC0_TYPE_MGT: 1219 vap->iv_stats.is_rx_mgmt++; 1220 IEEE80211_NODE_STAT(ni, rx_mgmt); 1221 if (dir != IEEE80211_FC1_DIR_NODS) { 1222 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1223 wh, "mgt", "incorrect dir 0x%x", dir); 1224 vap->iv_stats.is_rx_wrongdir++; 1225 goto err; 1226 } 1227 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1228 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1229 ni->ni_macaddr, "mgt", "too short: len %u", 1230 m->m_pkthdr.len); 1231 vap->iv_stats.is_rx_tooshort++; 1232 goto out; 1233 } 1234 #ifdef IEEE80211_DEBUG 1235 if ((ieee80211_msg_debug(vap) && 1236 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1237 ieee80211_msg_dumppkts(vap)) { 1238 if_printf(ifp, "received %s from %6D rssi %d\n", 1239 ieee80211_mgt_subtype_name[subtype >> 1240 IEEE80211_FC0_SUBTYPE_SHIFT], 1241 wh->i_addr2, ":", rssi); 1242 } 1243 #endif 1244 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1245 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1246 wh, NULL, "%s", "WEP set but not permitted"); 1247 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1248 goto out; 1249 } 1250 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1251 goto out; 1252 case IEEE80211_FC0_TYPE_CTL: 1253 vap->iv_stats.is_rx_ctl++; 1254 IEEE80211_NODE_STAT(ni, rx_ctrl); 1255 goto out; 1256 default: 1257 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1258 wh, "bad", "frame type 0x%x", type); 1259 /* should not come here */ 1260 break; 1261 } 1262 err: 1263 ifp->if_ierrors++; 1264 out: 1265 if (m != NULL) { 1266 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1267 ieee80211_radiotap_rx(vap, m); 1268 m_freem(m); 1269 } 1270 return type; 1271 } 1272 1273 static void 1274 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1275 int rssi, int nf) 1276 { 1277 struct ieee80211vap *vap = ni->ni_vap; 1278 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1279 struct ieee80211com *ic = ni->ni_ic; 1280 struct ieee80211_frame *wh; 1281 uint8_t *frm, *efrm; 1282 1283 wh = mtod(m0, struct ieee80211_frame *); 1284 frm = (uint8_t *)&wh[1]; 1285 efrm = mtod(m0, uint8_t *) + m0->m_len; 1286 switch (subtype) { 1287 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1288 case IEEE80211_FC0_SUBTYPE_BEACON: 1289 { 1290 struct ieee80211_scanparams scan; 1291 /* 1292 * We process beacon/probe response 1293 * frames to discover neighbors. 1294 */ 1295 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1296 return; 1297 /* 1298 * Count frame now that we know it's to be processed. 1299 */ 1300 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1301 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1302 IEEE80211_NODE_STAT(ni, rx_beacons); 1303 } else 1304 IEEE80211_NODE_STAT(ni, rx_proberesp); 1305 /* 1306 * If scanning, just pass information to the scan module. 1307 */ 1308 if (ic->ic_flags & IEEE80211_F_SCAN) { 1309 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1310 /* 1311 * Actively scanning a channel marked passive; 1312 * send a probe request now that we know there 1313 * is 802.11 traffic present. 1314 * 1315 * XXX check if the beacon we recv'd gives 1316 * us what we need and suppress the probe req 1317 */ 1318 ieee80211_probe_curchan(vap, 1); 1319 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1320 } 1321 ieee80211_add_scan(vap, &scan, wh, 1322 subtype, rssi, nf); 1323 return; 1324 } 1325 1326 /* The rest of this code assumes we are running */ 1327 if (vap->iv_state != IEEE80211_S_RUN) 1328 return; 1329 /* 1330 * Ignore non-mesh STAs. 1331 */ 1332 if ((scan.capinfo & 1333 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1334 scan.meshid == NULL || scan.meshconf == NULL) { 1335 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1336 wh, "beacon", "%s", "not a mesh sta"); 1337 vap->iv_stats.is_mesh_wrongmesh++; 1338 return; 1339 } 1340 /* 1341 * Ignore STAs for other mesh networks. 1342 */ 1343 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1344 mesh_verify_meshconf(vap, scan.meshconf)) { 1345 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1346 wh, "beacon", "%s", "not for our mesh"); 1347 vap->iv_stats.is_mesh_wrongmesh++; 1348 return; 1349 } 1350 /* 1351 * Peer only based on the current ACL policy. 1352 */ 1353 if (vap->iv_acl != NULL && 1354 !vap->iv_acl->iac_check(vap, wh->i_addr2)) { 1355 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1356 wh, NULL, "%s", "disallowed by ACL"); 1357 vap->iv_stats.is_rx_acl++; 1358 return; 1359 } 1360 /* 1361 * Do neighbor discovery. 1362 */ 1363 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1364 /* 1365 * Create a new entry in the neighbor table. 1366 */ 1367 ni = ieee80211_add_neighbor(vap, wh, &scan); 1368 } 1369 /* 1370 * Automatically peer with discovered nodes if possible. 1371 * XXX backoff on repeated failure 1372 */ 1373 if (ni != vap->iv_bss && 1374 (ms->ms_flags & IEEE80211_MESHFLAGS_AP) && 1375 ni->ni_mlstate == IEEE80211_NODE_MESH_IDLE) { 1376 uint16_t args[1]; 1377 1378 ni->ni_mlpid = mesh_generateid(vap); 1379 if (ni->ni_mlpid == 0) 1380 return; 1381 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1382 args[0] = ni->ni_mlpid; 1383 ieee80211_send_action(ni, 1384 IEEE80211_ACTION_CAT_MESHPEERING, 1385 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1386 ni->ni_mlrcnt = 0; 1387 mesh_peer_timeout_setup(ni); 1388 } 1389 break; 1390 } 1391 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1392 { 1393 uint8_t *ssid, *meshid, *rates, *xrates; 1394 uint8_t *sfrm; 1395 1396 if (vap->iv_state != IEEE80211_S_RUN) { 1397 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1398 wh, NULL, "wrong state %s", 1399 ieee80211_state_name[vap->iv_state]); 1400 vap->iv_stats.is_rx_mgtdiscard++; 1401 return; 1402 } 1403 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1404 /* frame must be directed */ 1405 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1406 wh, NULL, "%s", "not unicast"); 1407 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1408 return; 1409 } 1410 /* 1411 * prreq frame format 1412 * [tlv] ssid 1413 * [tlv] supported rates 1414 * [tlv] extended supported rates 1415 * [tlv] mesh id 1416 */ 1417 ssid = meshid = rates = xrates = NULL; 1418 sfrm = frm; 1419 while (efrm - frm > 1) { 1420 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1421 switch (*frm) { 1422 case IEEE80211_ELEMID_SSID: 1423 ssid = frm; 1424 break; 1425 case IEEE80211_ELEMID_RATES: 1426 rates = frm; 1427 break; 1428 case IEEE80211_ELEMID_XRATES: 1429 xrates = frm; 1430 break; 1431 case IEEE80211_ELEMID_MESHID: 1432 meshid = frm; 1433 break; 1434 } 1435 frm += frm[2] + 2; 1436 } 1437 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1438 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1439 if (xrates != NULL) 1440 IEEE80211_VERIFY_ELEMENT(xrates, 1441 IEEE80211_RATE_MAXSIZE - rates[1], return); 1442 if (meshid != NULL) { 1443 IEEE80211_VERIFY_ELEMENT(meshid, 1444 IEEE80211_MESHID_LEN, return); 1445 /* NB: meshid, not ssid */ 1446 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 1447 } 1448 1449 /* XXX find a better class or define it's own */ 1450 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1451 "%s", "recv probe req"); 1452 /* 1453 * Some legacy 11b clients cannot hack a complete 1454 * probe response frame. When the request includes 1455 * only a bare-bones rate set, communicate this to 1456 * the transmit side. 1457 */ 1458 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 1459 break; 1460 } 1461 case IEEE80211_FC0_SUBTYPE_ACTION: 1462 if (vap->iv_state != IEEE80211_S_RUN) { 1463 vap->iv_stats.is_rx_mgtdiscard++; 1464 break; 1465 } 1466 /* 1467 * We received an action for an unknown neighbor. 1468 * XXX: wait for it to beacon or create ieee80211_node? 1469 */ 1470 if (ni == vap->iv_bss) { 1471 IEEE80211_DISCARD(vap, IEEE80211_MSG_MESH, 1472 wh, NULL, "%s", "unknown node"); 1473 vap->iv_stats.is_rx_mgtdiscard++; 1474 break; 1475 } 1476 /* 1477 * Discard if not for us. 1478 */ 1479 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1480 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1481 IEEE80211_DISCARD(vap, IEEE80211_MSG_MESH, 1482 wh, NULL, "%s", "not for me"); 1483 vap->iv_stats.is_rx_mgtdiscard++; 1484 break; 1485 } 1486 /* XXX parse_action is a bit useless now */ 1487 if (ieee80211_parse_action(ni, m0) == 0) 1488 ic->ic_recv_action(ni, wh, frm, efrm); 1489 break; 1490 case IEEE80211_FC0_SUBTYPE_AUTH: 1491 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1492 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1493 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1494 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 1495 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1496 case IEEE80211_FC0_SUBTYPE_DISASSOC: 1497 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1498 wh, NULL, "%s", "not handled"); 1499 vap->iv_stats.is_rx_mgtdiscard++; 1500 return; 1501 default: 1502 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1503 wh, "mgt", "subtype 0x%x not handled", subtype); 1504 vap->iv_stats.is_rx_badsubtype++; 1505 break; 1506 } 1507 } 1508 1509 /* 1510 * Parse meshpeering action ie's for open+confirm frames; the 1511 * important bits are returned in the supplied structure. 1512 */ 1513 static const struct ieee80211_meshpeer_ie * 1514 mesh_parse_meshpeering_action(struct ieee80211_node *ni, 1515 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 1516 const uint8_t *frm, const uint8_t *efrm, 1517 struct ieee80211_meshpeer_ie *mp, uint8_t subtype) 1518 { 1519 struct ieee80211vap *vap = ni->ni_vap; 1520 const struct ieee80211_meshpeer_ie *mpie; 1521 const uint8_t *meshid, *meshconf, *meshpeer; 1522 1523 meshid = meshconf = meshpeer = NULL; 1524 while (efrm - frm > 1) { 1525 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 1526 switch (*frm) { 1527 case IEEE80211_ELEMID_MESHID: 1528 meshid = frm; 1529 break; 1530 case IEEE80211_ELEMID_MESHCONF: 1531 meshconf = frm; 1532 break; 1533 case IEEE80211_ELEMID_MESHPEER: 1534 meshpeer = frm; 1535 mpie = (const struct ieee80211_meshpeer_ie *) frm; 1536 memset(mp, 0, sizeof(*mp)); 1537 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 1538 /* NB: peer link ID is optional on these frames */ 1539 if (subtype == IEEE80211_MESH_PEER_LINK_CLOSE && 1540 mpie->peer_len == 8) { 1541 mp->peer_linkid = 0; 1542 mp->peer_rcode = LE_READ_2(&mpie->peer_linkid); 1543 } else { 1544 mp->peer_linkid = LE_READ_2(&mpie->peer_linkid); 1545 mp->peer_rcode = LE_READ_2(&mpie->peer_rcode); 1546 } 1547 break; 1548 } 1549 frm += frm[1] + 2; 1550 } 1551 1552 /* 1553 * Verify the contents of the frame. Action frames with 1554 * close subtype don't have a Mesh Configuration IE. 1555 * If if fails validation, close the peer link. 1556 */ 1557 KASSERT(meshpeer != NULL && 1558 subtype != IEEE80211_ACTION_MESHPEERING_CLOSE, 1559 ("parsing close action")); 1560 1561 if (mesh_verify_meshid(vap, meshid) || 1562 mesh_verify_meshpeer(vap, subtype, meshpeer) || 1563 mesh_verify_meshconf(vap, meshconf)) { 1564 uint16_t args[3]; 1565 1566 IEEE80211_DISCARD(vap, 1567 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1568 wh, NULL, "%s", "not for our mesh"); 1569 vap->iv_stats.is_rx_mgtdiscard++; 1570 switch (ni->ni_mlstate) { 1571 case IEEE80211_NODE_MESH_IDLE: 1572 case IEEE80211_NODE_MESH_ESTABLISHED: 1573 case IEEE80211_NODE_MESH_HOLDING: 1574 /* ignore */ 1575 break; 1576 case IEEE80211_NODE_MESH_OPENSNT: 1577 case IEEE80211_NODE_MESH_OPENRCV: 1578 case IEEE80211_NODE_MESH_CONFIRMRCV: 1579 args[0] = ni->ni_mlpid; 1580 args[1] = ni->ni_mllid; 1581 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1582 ieee80211_send_action(ni, 1583 IEEE80211_ACTION_CAT_MESHPEERING, 1584 IEEE80211_ACTION_MESHPEERING_CLOSE, 1585 args); 1586 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1587 mesh_peer_timeout_setup(ni); 1588 break; 1589 } 1590 return NULL; 1591 } 1592 return (const struct ieee80211_meshpeer_ie *) mp; 1593 } 1594 1595 static int 1596 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 1597 const struct ieee80211_frame *wh, 1598 const uint8_t *frm, const uint8_t *efrm) 1599 { 1600 struct ieee80211vap *vap = ni->ni_vap; 1601 struct ieee80211_meshpeer_ie ie; 1602 const struct ieee80211_meshpeer_ie *meshpeer; 1603 uint16_t args[3]; 1604 1605 /* +2+2 for action + code + capabilites */ 1606 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie, 1607 IEEE80211_ACTION_MESHPEERING_OPEN); 1608 if (meshpeer == NULL) { 1609 return 0; 1610 } 1611 1612 /* XXX move up */ 1613 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1614 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 1615 1616 switch (ni->ni_mlstate) { 1617 case IEEE80211_NODE_MESH_IDLE: 1618 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 1619 ni->ni_mllid = meshpeer->peer_llinkid; 1620 ni->ni_mlpid = mesh_generateid(vap); 1621 if (ni->ni_mlpid == 0) 1622 return 0; /* XXX */ 1623 args[0] = ni->ni_mlpid; 1624 /* Announce we're open too... */ 1625 ieee80211_send_action(ni, 1626 IEEE80211_ACTION_CAT_MESHPEERING, 1627 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1628 /* ...and confirm the link. */ 1629 args[0] = ni->ni_mlpid; 1630 args[1] = ni->ni_mllid; 1631 ieee80211_send_action(ni, 1632 IEEE80211_ACTION_CAT_MESHPEERING, 1633 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1634 args); 1635 mesh_peer_timeout_setup(ni); 1636 break; 1637 case IEEE80211_NODE_MESH_OPENRCV: 1638 /* Wrong Link ID */ 1639 if (ni->ni_mllid != meshpeer->peer_llinkid) { 1640 args[0] = ni->ni_mllid; 1641 args[1] = ni->ni_mlpid; 1642 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1643 ieee80211_send_action(ni, 1644 IEEE80211_ACTION_CAT_MESHPEERING, 1645 IEEE80211_ACTION_MESHPEERING_CLOSE, 1646 args); 1647 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1648 mesh_peer_timeout_setup(ni); 1649 break; 1650 } 1651 /* Duplicate open, confirm again. */ 1652 args[0] = ni->ni_mlpid; 1653 args[1] = ni->ni_mllid; 1654 ieee80211_send_action(ni, 1655 IEEE80211_ACTION_CAT_MESHPEERING, 1656 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1657 args); 1658 break; 1659 case IEEE80211_NODE_MESH_OPENSNT: 1660 ni->ni_mllid = meshpeer->peer_llinkid; 1661 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 1662 args[0] = ni->ni_mlpid; 1663 args[1] = ni->ni_mllid; 1664 ieee80211_send_action(ni, 1665 IEEE80211_ACTION_CAT_MESHPEERING, 1666 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1667 args); 1668 /* NB: don't setup/clear any timeout */ 1669 break; 1670 case IEEE80211_NODE_MESH_CONFIRMRCV: 1671 if (ni->ni_mlpid != meshpeer->peer_linkid || 1672 ni->ni_mllid != meshpeer->peer_llinkid) { 1673 args[0] = ni->ni_mlpid; 1674 args[1] = ni->ni_mllid; 1675 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1676 ieee80211_send_action(ni, 1677 IEEE80211_ACTION_CAT_MESHPEERING, 1678 IEEE80211_ACTION_MESHPEERING_CLOSE, 1679 args); 1680 mesh_linkchange(ni, 1681 IEEE80211_NODE_MESH_HOLDING); 1682 mesh_peer_timeout_setup(ni); 1683 break; 1684 } 1685 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 1686 ni->ni_mllid = meshpeer->peer_llinkid; 1687 args[0] = ni->ni_mlpid; 1688 args[1] = ni->ni_mllid; 1689 ieee80211_send_action(ni, 1690 IEEE80211_ACTION_CAT_MESHPEERING, 1691 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1692 args); 1693 mesh_peer_timeout_stop(ni); 1694 break; 1695 case IEEE80211_NODE_MESH_ESTABLISHED: 1696 if (ni->ni_mllid != meshpeer->peer_llinkid) { 1697 args[0] = ni->ni_mllid; 1698 args[1] = ni->ni_mlpid; 1699 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1700 ieee80211_send_action(ni, 1701 IEEE80211_ACTION_CAT_MESHPEERING, 1702 IEEE80211_ACTION_MESHPEERING_CLOSE, 1703 args); 1704 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1705 mesh_peer_timeout_setup(ni); 1706 break; 1707 } 1708 args[0] = ni->ni_mlpid; 1709 args[1] = ni->ni_mllid; 1710 ieee80211_send_action(ni, 1711 IEEE80211_ACTION_CAT_MESHPEERING, 1712 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1713 args); 1714 break; 1715 case IEEE80211_NODE_MESH_HOLDING: 1716 args[0] = ni->ni_mlpid; 1717 args[1] = meshpeer->peer_llinkid; 1718 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 1719 ieee80211_send_action(ni, 1720 IEEE80211_ACTION_CAT_MESHPEERING, 1721 IEEE80211_ACTION_MESHPEERING_CLOSE, 1722 args); 1723 break; 1724 } 1725 return 0; 1726 } 1727 1728 static int 1729 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 1730 const struct ieee80211_frame *wh, 1731 const uint8_t *frm, const uint8_t *efrm) 1732 { 1733 struct ieee80211vap *vap = ni->ni_vap; 1734 struct ieee80211_meshpeer_ie ie; 1735 const struct ieee80211_meshpeer_ie *meshpeer; 1736 uint16_t args[3]; 1737 1738 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 1739 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie, 1740 IEEE80211_ACTION_MESHPEERING_CONFIRM); 1741 if (meshpeer == NULL) { 1742 return 0; 1743 } 1744 1745 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1746 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 1747 meshpeer->peer_llinkid, meshpeer->peer_linkid); 1748 1749 switch (ni->ni_mlstate) { 1750 case IEEE80211_NODE_MESH_OPENRCV: 1751 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 1752 mesh_peer_timeout_stop(ni); 1753 break; 1754 case IEEE80211_NODE_MESH_OPENSNT: 1755 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 1756 break; 1757 case IEEE80211_NODE_MESH_HOLDING: 1758 args[0] = ni->ni_mlpid; 1759 args[1] = meshpeer->peer_llinkid; 1760 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 1761 ieee80211_send_action(ni, 1762 IEEE80211_ACTION_CAT_MESHPEERING, 1763 IEEE80211_ACTION_MESHPEERING_CLOSE, 1764 args); 1765 break; 1766 case IEEE80211_NODE_MESH_CONFIRMRCV: 1767 if (ni->ni_mllid != meshpeer->peer_llinkid) { 1768 args[0] = ni->ni_mlpid; 1769 args[1] = ni->ni_mllid; 1770 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1771 ieee80211_send_action(ni, 1772 IEEE80211_ACTION_CAT_MESHPEERING, 1773 IEEE80211_ACTION_MESHPEERING_CLOSE, 1774 args); 1775 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1776 mesh_peer_timeout_setup(ni); 1777 } 1778 break; 1779 default: 1780 IEEE80211_DISCARD(vap, 1781 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1782 wh, NULL, "received confirm in invalid state %d", 1783 ni->ni_mlstate); 1784 vap->iv_stats.is_rx_mgtdiscard++; 1785 break; 1786 } 1787 return 0; 1788 } 1789 1790 static int 1791 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 1792 const struct ieee80211_frame *wh, 1793 const uint8_t *frm, const uint8_t *efrm) 1794 { 1795 uint16_t args[3]; 1796 1797 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1798 ni, "%s", "recv PEER CLOSE"); 1799 1800 switch (ni->ni_mlstate) { 1801 case IEEE80211_NODE_MESH_IDLE: 1802 /* ignore */ 1803 break; 1804 case IEEE80211_NODE_MESH_OPENRCV: 1805 case IEEE80211_NODE_MESH_OPENSNT: 1806 case IEEE80211_NODE_MESH_CONFIRMRCV: 1807 case IEEE80211_NODE_MESH_ESTABLISHED: 1808 args[0] = ni->ni_mlpid; 1809 args[1] = ni->ni_mllid; 1810 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 1811 ieee80211_send_action(ni, 1812 IEEE80211_ACTION_CAT_MESHPEERING, 1813 IEEE80211_ACTION_MESHPEERING_CLOSE, 1814 args); 1815 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1816 mesh_peer_timeout_setup(ni); 1817 break; 1818 case IEEE80211_NODE_MESH_HOLDING: 1819 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 1820 mesh_peer_timeout_setup(ni); 1821 break; 1822 } 1823 return 0; 1824 } 1825 1826 /* 1827 * Link Metric handling. 1828 */ 1829 static int 1830 mesh_recv_action_meshlmetric_req(struct ieee80211_node *ni, 1831 const struct ieee80211_frame *wh, 1832 const uint8_t *frm, const uint8_t *efrm) 1833 { 1834 uint32_t metric; 1835 1836 metric = mesh_airtime_calc(ni); 1837 ieee80211_send_action(ni, 1838 IEEE80211_ACTION_CAT_MESHLMETRIC, 1839 IEEE80211_ACTION_MESHLMETRIC_REP, 1840 &metric); 1841 return 0; 1842 } 1843 1844 static int 1845 mesh_recv_action_meshlmetric_rep(struct ieee80211_node *ni, 1846 const struct ieee80211_frame *wh, 1847 const uint8_t *frm, const uint8_t *efrm) 1848 { 1849 return 0; 1850 } 1851 1852 static int 1853 mesh_send_action(struct ieee80211_node *ni, struct mbuf *m) 1854 { 1855 struct ieee80211_bpf_params params; 1856 1857 memset(¶ms, 0, sizeof(params)); 1858 params.ibp_pri = WME_AC_VO; 1859 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 1860 /* XXX ucast/mcast */ 1861 params.ibp_try0 = ni->ni_txparms->maxretry; 1862 params.ibp_power = ni->ni_txpower; 1863 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION, 1864 ¶ms); 1865 } 1866 1867 #define ADDSHORT(frm, v) do { \ 1868 frm[0] = (v) & 0xff; \ 1869 frm[1] = (v) >> 8; \ 1870 frm += 2; \ 1871 } while (0) 1872 #define ADDWORD(frm, v) do { \ 1873 frm[0] = (v) & 0xff; \ 1874 frm[1] = ((v) >> 8) & 0xff; \ 1875 frm[2] = ((v) >> 16) & 0xff; \ 1876 frm[3] = ((v) >> 24) & 0xff; \ 1877 frm += 4; \ 1878 } while (0) 1879 1880 static int 1881 mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 1882 int category, int action, void *args0) 1883 { 1884 struct ieee80211vap *vap = ni->ni_vap; 1885 struct ieee80211com *ic = ni->ni_ic; 1886 uint16_t *args = args0; 1887 const struct ieee80211_rateset *rs; 1888 struct mbuf *m; 1889 uint8_t *frm; 1890 1891 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1892 "send PEER OPEN action: localid 0x%x", args[0]); 1893 1894 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1895 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 1896 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 1897 ieee80211_ref_node(ni); 1898 1899 m = ieee80211_getmgtframe(&frm, 1900 ic->ic_headroom + sizeof(struct ieee80211_frame), 1901 sizeof(uint16_t) /* action+category */ 1902 + sizeof(uint16_t) /* capabilites */ 1903 + 2 + IEEE80211_RATE_SIZE 1904 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1905 + 2 + IEEE80211_MESHID_LEN 1906 + sizeof(struct ieee80211_meshconf_ie) 1907 + sizeof(struct ieee80211_meshpeer_ie) 1908 ); 1909 if (m != NULL) { 1910 /* 1911 * mesh peer open action frame format: 1912 * [1] category 1913 * [1] action 1914 * [2] capabilities 1915 * [tlv] rates 1916 * [tlv] xrates 1917 * [tlv] mesh id 1918 * [tlv] mesh conf 1919 * [tlv] mesh peer link mgmt 1920 */ 1921 *frm++ = category; 1922 *frm++ = action; 1923 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 1924 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 1925 frm = ieee80211_add_rates(frm, rs); 1926 frm = ieee80211_add_xrates(frm, rs); 1927 frm = ieee80211_add_meshid(frm, vap); 1928 frm = ieee80211_add_meshconf(frm, vap); 1929 frm = ieee80211_add_meshpeer(frm, IEEE80211_MESH_PEER_LINK_OPEN, 1930 args[0], 0, 0); 1931 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1932 return mesh_send_action(ni, m); 1933 } else { 1934 vap->iv_stats.is_tx_nobuf++; 1935 ieee80211_free_node(ni); 1936 return ENOMEM; 1937 } 1938 } 1939 1940 static int 1941 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 1942 int category, int action, void *args0) 1943 { 1944 struct ieee80211vap *vap = ni->ni_vap; 1945 struct ieee80211com *ic = ni->ni_ic; 1946 uint16_t *args = args0; 1947 const struct ieee80211_rateset *rs; 1948 struct mbuf *m; 1949 uint8_t *frm; 1950 1951 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1952 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 1953 args[0], args[1]); 1954 1955 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1956 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 1957 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 1958 ieee80211_ref_node(ni); 1959 1960 m = ieee80211_getmgtframe(&frm, 1961 ic->ic_headroom + sizeof(struct ieee80211_frame), 1962 sizeof(uint16_t) /* action+category */ 1963 + sizeof(uint16_t) /* capabilites */ 1964 + sizeof(uint16_t) /* status code */ 1965 + sizeof(uint16_t) /* AID */ 1966 + 2 + IEEE80211_RATE_SIZE 1967 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1968 + 2 + IEEE80211_MESHID_LEN 1969 + sizeof(struct ieee80211_meshconf_ie) 1970 + sizeof(struct ieee80211_meshpeer_ie) 1971 ); 1972 if (m != NULL) { 1973 /* 1974 * mesh peer confirm action frame format: 1975 * [1] category 1976 * [1] action 1977 * [2] capabilities 1978 * [2] status code 1979 * [2] association id (peer ID) 1980 * [tlv] rates 1981 * [tlv] xrates 1982 * [tlv] mesh id 1983 * [tlv] mesh conf 1984 * [tlv] mesh peer link mgmt 1985 */ 1986 *frm++ = category; 1987 *frm++ = action; 1988 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 1989 ADDSHORT(frm, 0); /* status code */ 1990 ADDSHORT(frm, args[1]); /* AID */ 1991 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 1992 frm = ieee80211_add_rates(frm, rs); 1993 frm = ieee80211_add_xrates(frm, rs); 1994 frm = ieee80211_add_meshid(frm, vap); 1995 frm = ieee80211_add_meshconf(frm, vap); 1996 frm = ieee80211_add_meshpeer(frm, 1997 IEEE80211_MESH_PEER_LINK_CONFIRM, 1998 args[0], args[1], 0); 1999 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2000 return mesh_send_action(ni, m); 2001 } else { 2002 vap->iv_stats.is_tx_nobuf++; 2003 ieee80211_free_node(ni); 2004 return ENOMEM; 2005 } 2006 } 2007 2008 static int 2009 mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 2010 int category, int action, void *args0) 2011 { 2012 struct ieee80211vap *vap = ni->ni_vap; 2013 struct ieee80211com *ic = ni->ni_ic; 2014 uint16_t *args = args0; 2015 struct mbuf *m; 2016 uint8_t *frm; 2017 2018 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2019 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 2020 args[0], args[1], args[2]); 2021 2022 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2023 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 2024 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 2025 ieee80211_ref_node(ni); 2026 2027 m = ieee80211_getmgtframe(&frm, 2028 ic->ic_headroom + sizeof(struct ieee80211_frame), 2029 sizeof(uint16_t) /* action+category */ 2030 + sizeof(uint16_t) /* reason code */ 2031 + 2 + IEEE80211_MESHID_LEN 2032 + sizeof(struct ieee80211_meshpeer_ie) 2033 ); 2034 if (m != NULL) { 2035 /* 2036 * mesh peer close action frame format: 2037 * [1] category 2038 * [1] action 2039 * [2] reason code 2040 * [tlv] mesh id 2041 * [tlv] mesh peer link mgmt 2042 */ 2043 *frm++ = category; 2044 *frm++ = action; 2045 ADDSHORT(frm, args[2]); /* reason code */ 2046 frm = ieee80211_add_meshid(frm, vap); 2047 frm = ieee80211_add_meshpeer(frm, 2048 IEEE80211_MESH_PEER_LINK_CLOSE, 2049 args[0], args[1], args[2]); 2050 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2051 return mesh_send_action(ni, m); 2052 } else { 2053 vap->iv_stats.is_tx_nobuf++; 2054 ieee80211_free_node(ni); 2055 return ENOMEM; 2056 } 2057 } 2058 2059 static int 2060 mesh_send_action_meshlink_request(struct ieee80211_node *ni, 2061 int category, int action, void *arg0) 2062 { 2063 struct ieee80211vap *vap = ni->ni_vap; 2064 struct ieee80211com *ic = ni->ni_ic; 2065 struct mbuf *m; 2066 uint8_t *frm; 2067 2068 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2069 "%s", "send LINK METRIC REQUEST action"); 2070 2071 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2072 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 2073 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 2074 ieee80211_ref_node(ni); 2075 2076 m = ieee80211_getmgtframe(&frm, 2077 ic->ic_headroom + sizeof(struct ieee80211_frame), 2078 sizeof(uint16_t) /* action+category */ 2079 ); 2080 if (m != NULL) { 2081 /* 2082 * mesh link metric request 2083 * [1] category 2084 * [1] action 2085 */ 2086 *frm++ = category; 2087 *frm++ = action; 2088 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2089 return mesh_send_action(ni, m); 2090 } else { 2091 vap->iv_stats.is_tx_nobuf++; 2092 ieee80211_free_node(ni); 2093 return ENOMEM; 2094 } 2095 } 2096 2097 static int 2098 mesh_send_action_meshlink_reply(struct ieee80211_node *ni, 2099 int category, int action, void *args0) 2100 { 2101 struct ieee80211vap *vap = ni->ni_vap; 2102 struct ieee80211com *ic = ni->ni_ic; 2103 uint32_t *metric = args0; 2104 struct mbuf *m; 2105 uint8_t *frm; 2106 2107 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 2108 "send LINK METRIC REPLY action: metric 0x%x", *metric); 2109 2110 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2111 "ieee80211_ref_node (%s:%u) %p<%6D> refcnt %d\n", __func__, __LINE__, 2112 ni, ni->ni_macaddr, ":", ieee80211_node_refcnt(ni)+1); 2113 ieee80211_ref_node(ni); 2114 2115 m = ieee80211_getmgtframe(&frm, 2116 ic->ic_headroom + sizeof(struct ieee80211_frame), 2117 sizeof(uint16_t) /* action+category */ 2118 + sizeof(struct ieee80211_meshlmetric_ie) 2119 ); 2120 if (m != NULL) { 2121 /* 2122 * mesh link metric reply 2123 * [1] category 2124 * [1] action 2125 * [tlv] mesh link metric 2126 */ 2127 *frm++ = category; 2128 *frm++ = action; 2129 frm = ieee80211_add_meshlmetric(frm, *metric); 2130 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2131 return mesh_send_action(ni, m); 2132 } else { 2133 vap->iv_stats.is_tx_nobuf++; 2134 ieee80211_free_node(ni); 2135 return ENOMEM; 2136 } 2137 } 2138 2139 static void 2140 mesh_peer_timeout_setup(struct ieee80211_node *ni) 2141 { 2142 switch (ni->ni_mlstate) { 2143 case IEEE80211_NODE_MESH_HOLDING: 2144 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 2145 break; 2146 case IEEE80211_NODE_MESH_CONFIRMRCV: 2147 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 2148 break; 2149 case IEEE80211_NODE_MESH_IDLE: 2150 ni->ni_mltval = 0; 2151 break; 2152 default: 2153 ni->ni_mltval = ieee80211_mesh_retrytimeout; 2154 break; 2155 } 2156 if (ni->ni_mltval) { 2157 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2158 mesh_peer_timeout_callout, ni); 2159 } 2160 } 2161 2162 /* 2163 * Same as above but backoffs timer statisically 50%. 2164 */ 2165 static void 2166 mesh_peer_timeout_backoff(struct ieee80211_node *ni) 2167 { 2168 uint32_t r; 2169 2170 r = karc4random(); 2171 ni->ni_mltval += r % ni->ni_mltval; 2172 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 2173 mesh_peer_timeout_callout, ni); 2174 } 2175 2176 static __inline void 2177 mesh_peer_timeout_stop(struct ieee80211_node *ni) 2178 { 2179 callout_stop(&ni->ni_mltimer); 2180 } 2181 2182 /* 2183 * Mesh Peer Link Management FSM timeout handling. 2184 */ 2185 static void 2186 mesh_peer_timeout_callout(void *arg) 2187 { 2188 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 2189 uint16_t args[3]; 2190 2191 wlan_serialize_enter(); 2192 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 2193 ni, "mesh link timeout, state %d, retry counter %d", 2194 ni->ni_mlstate, ni->ni_mlrcnt); 2195 2196 switch (ni->ni_mlstate) { 2197 case IEEE80211_NODE_MESH_IDLE: 2198 case IEEE80211_NODE_MESH_ESTABLISHED: 2199 break; 2200 case IEEE80211_NODE_MESH_OPENSNT: 2201 case IEEE80211_NODE_MESH_OPENRCV: 2202 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 2203 args[0] = ni->ni_mlpid; 2204 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 2205 ieee80211_send_action(ni, 2206 IEEE80211_ACTION_CAT_MESHPEERING, 2207 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2208 ni->ni_mlrcnt = 0; 2209 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2210 mesh_peer_timeout_setup(ni); 2211 } else { 2212 args[0] = ni->ni_mlpid; 2213 ieee80211_send_action(ni, 2214 IEEE80211_ACTION_CAT_MESHPEERING, 2215 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2216 ni->ni_mlrcnt++; 2217 mesh_peer_timeout_backoff(ni); 2218 } 2219 break; 2220 case IEEE80211_NODE_MESH_CONFIRMRCV: 2221 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 2222 args[0] = ni->ni_mlpid; 2223 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 2224 ieee80211_send_action(ni, 2225 IEEE80211_ACTION_CAT_MESHPEERING, 2226 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2227 ni->ni_mlrcnt = 0; 2228 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2229 mesh_peer_timeout_setup(ni); 2230 } else { 2231 ni->ni_mlrcnt++; 2232 mesh_peer_timeout_setup(ni); 2233 } 2234 break; 2235 case IEEE80211_NODE_MESH_HOLDING: 2236 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2237 break; 2238 } 2239 wlan_serialize_exit(); 2240 } 2241 2242 static int 2243 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 2244 { 2245 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2246 2247 if (ie == NULL || ie[1] != ms->ms_idlen) 2248 return 1; 2249 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 2250 } 2251 2252 /* 2253 * Check if we are using the same algorithms for this mesh. 2254 */ 2255 static int 2256 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 2257 { 2258 const struct ieee80211_meshconf_ie *meshconf = 2259 (const struct ieee80211_meshconf_ie *) ie; 2260 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 2261 uint16_t cap; 2262 2263 if (meshconf == NULL) 2264 return 1; 2265 if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) { 2266 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2267 "unknown path selection algorithm: 0x%x\n", 2268 meshconf->conf_pselid); 2269 return 1; 2270 } 2271 if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) { 2272 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2273 "unknown path metric algorithm: 0x%x\n", 2274 meshconf->conf_pmetid); 2275 return 1; 2276 } 2277 if (meshconf->conf_ccid != 0) { 2278 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2279 "unknown congestion control algorithm: 0x%x\n", 2280 meshconf->conf_ccid); 2281 return 1; 2282 } 2283 if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) { 2284 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2285 "unknown sync algorithm: 0x%x\n", 2286 meshconf->conf_syncid); 2287 return 1; 2288 } 2289 if (meshconf->conf_authid != 0) { 2290 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2291 "unknown auth auth algorithm: 0x%x\n", 2292 meshconf->conf_pselid); 2293 return 1; 2294 } 2295 /* NB: conf_cap is only read correctly here */ 2296 cap = LE_READ_2(&meshconf->conf_cap); 2297 /* Not accepting peers */ 2298 if (!(cap & IEEE80211_MESHCONF_CAP_AP)) { 2299 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2300 "not accepting peers: 0x%x\n", meshconf->conf_cap); 2301 return 1; 2302 } 2303 return 0; 2304 } 2305 2306 static int 2307 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype, 2308 const uint8_t *ie) 2309 { 2310 const struct ieee80211_meshpeer_ie *meshpeer = 2311 (const struct ieee80211_meshpeer_ie *) ie; 2312 2313 if (meshpeer == NULL || meshpeer->peer_len < 6 || 2314 meshpeer->peer_len > 10) 2315 return 1; 2316 switch (subtype) { 2317 case IEEE80211_MESH_PEER_LINK_OPEN: 2318 if (meshpeer->peer_len != 6) 2319 return 1; 2320 break; 2321 case IEEE80211_MESH_PEER_LINK_CONFIRM: 2322 if (meshpeer->peer_len != 8) 2323 return 1; 2324 break; 2325 case IEEE80211_MESH_PEER_LINK_CLOSE: 2326 if (meshpeer->peer_len < 8) 2327 return 1; 2328 if (meshpeer->peer_len == 8 && meshpeer->peer_linkid != 0) 2329 return 1; 2330 if (meshpeer->peer_rcode == 0) 2331 return 1; 2332 break; 2333 } 2334 return 0; 2335 } 2336 2337 /* 2338 * Add a Mesh ID IE to a frame. 2339 */ 2340 uint8_t * 2341 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 2342 { 2343 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2344 2345 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 2346 2347 *frm++ = IEEE80211_ELEMID_MESHID; 2348 *frm++ = ms->ms_idlen; 2349 memcpy(frm, ms->ms_id, ms->ms_idlen); 2350 return frm + ms->ms_idlen; 2351 } 2352 2353 /* 2354 * Add a Mesh Configuration IE to a frame. 2355 * For now just use HWMP routing, Airtime link metric, Null Congestion 2356 * Signaling, Null Sync Protocol and Null Authentication. 2357 */ 2358 uint8_t * 2359 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 2360 { 2361 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 2362 uint16_t caps; 2363 2364 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 2365 2366 *frm++ = IEEE80211_ELEMID_MESHCONF; 2367 *frm++ = sizeof(struct ieee80211_meshconf_ie) - 2; 2368 *frm++ = ms->ms_ppath->mpp_ie; /* path selection */ 2369 *frm++ = ms->ms_pmetric->mpm_ie; /* link metric */ 2370 *frm++ = IEEE80211_MESHCONF_CC_DISABLED; 2371 *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF; 2372 *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED; 2373 /* NB: set the number of neighbors before the rest */ 2374 *frm = (ms->ms_neighbors > 15 ? 15 : ms->ms_neighbors) << 1; 2375 if (ms->ms_flags & IEEE80211_MESHFLAGS_PORTAL) 2376 *frm |= IEEE80211_MESHCONF_FORM_MP; 2377 frm += 1; 2378 caps = 0; 2379 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 2380 caps |= IEEE80211_MESHCONF_CAP_AP; 2381 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 2382 caps |= IEEE80211_MESHCONF_CAP_FWRD; 2383 ADDSHORT(frm, caps); 2384 return frm; 2385 } 2386 2387 /* 2388 * Add a Mesh Peer Management IE to a frame. 2389 */ 2390 uint8_t * 2391 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 2392 uint16_t peerid, uint16_t reason) 2393 { 2394 /* XXX change for AH */ 2395 static const uint8_t meshpeerproto[4] = IEEE80211_MESH_PEER_PROTO; 2396 2397 KASSERT(localid != 0, ("localid == 0")); 2398 2399 *frm++ = IEEE80211_ELEMID_MESHPEER; 2400 switch (subtype) { 2401 case IEEE80211_MESH_PEER_LINK_OPEN: 2402 *frm++ = 6; /* length */ 2403 memcpy(frm, meshpeerproto, 4); 2404 frm += 4; 2405 ADDSHORT(frm, localid); /* local ID */ 2406 break; 2407 case IEEE80211_MESH_PEER_LINK_CONFIRM: 2408 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 2409 *frm++ = 8; /* length */ 2410 memcpy(frm, meshpeerproto, 4); 2411 frm += 4; 2412 ADDSHORT(frm, localid); /* local ID */ 2413 ADDSHORT(frm, peerid); /* peer ID */ 2414 break; 2415 case IEEE80211_MESH_PEER_LINK_CLOSE: 2416 if (peerid) 2417 *frm++ = 10; /* length */ 2418 else 2419 *frm++ = 8; /* length */ 2420 memcpy(frm, meshpeerproto, 4); 2421 frm += 4; 2422 ADDSHORT(frm, localid); /* local ID */ 2423 if (peerid) 2424 ADDSHORT(frm, peerid); /* peer ID */ 2425 ADDSHORT(frm, reason); 2426 break; 2427 } 2428 return frm; 2429 } 2430 2431 /* 2432 * Compute an Airtime Link Metric for the link with this node. 2433 * 2434 * Based on Draft 3.0 spec (11B.10, p.149). 2435 */ 2436 /* 2437 * Max 802.11s overhead. 2438 */ 2439 #define IEEE80211_MESH_MAXOVERHEAD \ 2440 (sizeof(struct ieee80211_qosframe_addr4) \ 2441 + sizeof(struct ieee80211_meshcntl_ae11) \ 2442 + sizeof(struct llc) \ 2443 + IEEE80211_ADDR_LEN \ 2444 + IEEE80211_WEP_IVLEN \ 2445 + IEEE80211_WEP_KIDLEN \ 2446 + IEEE80211_WEP_CRCLEN \ 2447 + IEEE80211_WEP_MICLEN \ 2448 + IEEE80211_CRC_LEN) 2449 uint32_t 2450 mesh_airtime_calc(struct ieee80211_node *ni) 2451 { 2452 #define M_BITS 8 2453 #define S_FACTOR (2 * M_BITS) 2454 struct ieee80211com *ic = ni->ni_ic; 2455 struct ifnet *ifp = ni->ni_vap->iv_ifp; 2456 static const int nbits = 8192 << M_BITS; 2457 uint32_t overhead, rate, errrate; 2458 uint64_t res; 2459 2460 /* Time to transmit a frame */ 2461 rate = ni->ni_txrate; 2462 overhead = ieee80211_compute_duration(ic->ic_rt, 2463 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 2464 /* Error rate in percentage */ 2465 /* XXX assuming small failures are ok */ 2466 errrate = (((ifp->if_oerrors + 2467 ifp->if_ierrors) / 100) << M_BITS) / 100; 2468 res = (overhead + (nbits / rate)) * 2469 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 2470 2471 return (uint32_t)(res >> S_FACTOR); 2472 #undef M_BITS 2473 #undef S_FACTOR 2474 } 2475 2476 /* 2477 * Add a Mesh Link Metric report IE to a frame. 2478 */ 2479 uint8_t * 2480 ieee80211_add_meshlmetric(uint8_t *frm, uint32_t metric) 2481 { 2482 *frm++ = IEEE80211_ELEMID_MESHLINK; 2483 *frm++ = 4; 2484 ADDWORD(frm, metric); 2485 return frm; 2486 } 2487 #undef ADDSHORT 2488 #undef ADDWORD 2489 2490 /* 2491 * Initialize any mesh-specific node state. 2492 */ 2493 void 2494 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 2495 { 2496 ni->ni_flags |= IEEE80211_NODE_QOS; 2497 callout_init_mp(&ni->ni_mltimer); 2498 } 2499 2500 /* 2501 * Cleanup any mesh-specific node state. 2502 */ 2503 void 2504 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 2505 { 2506 struct ieee80211vap *vap = ni->ni_vap; 2507 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2508 2509 callout_stop(&ni->ni_mltimer); 2510 /* NB: short-circuit callbacks after mesh_vdetach */ 2511 if (vap->iv_mesh != NULL) 2512 ms->ms_ppath->mpp_peerdown(ni); 2513 } 2514 2515 void 2516 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 2517 { 2518 ni->ni_meshidlen = ie[1]; 2519 memcpy(ni->ni_meshid, ie + 2, ie[1]); 2520 } 2521 2522 /* 2523 * Setup mesh-specific node state on neighbor discovery. 2524 */ 2525 void 2526 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 2527 const struct ieee80211_frame *wh, 2528 const struct ieee80211_scanparams *sp) 2529 { 2530 ieee80211_parse_meshid(ni, sp->meshid); 2531 } 2532 2533 void 2534 ieee80211_mesh_update_beacon(struct ieee80211vap *vap, 2535 struct ieee80211_beacon_offsets *bo) 2536 { 2537 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 2538 2539 if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) { 2540 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap); 2541 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF); 2542 } 2543 } 2544 2545 static int 2546 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 2547 { 2548 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2549 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 2550 struct ieee80211_mesh_route *rt; 2551 struct ieee80211req_mesh_route *imr; 2552 size_t len, off; 2553 uint8_t *p; 2554 int error; 2555 2556 if (vap->iv_opmode != IEEE80211_M_MBSS) 2557 return ENOSYS; 2558 2559 error = 0; 2560 switch (ireq->i_type) { 2561 case IEEE80211_IOC_MESH_ID: 2562 ireq->i_len = ms->ms_idlen; 2563 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 2564 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 2565 break; 2566 case IEEE80211_IOC_MESH_AP: 2567 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 2568 break; 2569 case IEEE80211_IOC_MESH_FWRD: 2570 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 2571 break; 2572 case IEEE80211_IOC_MESH_TTL: 2573 ireq->i_val = ms->ms_ttl; 2574 break; 2575 case IEEE80211_IOC_MESH_RTCMD: 2576 switch (ireq->i_val) { 2577 case IEEE80211_MESH_RTCMD_LIST: 2578 len = 0; 2579 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 2580 len += sizeof(*imr); 2581 } 2582 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 2583 ireq->i_len = len; 2584 return ENOMEM; 2585 } 2586 ireq->i_len = len; 2587 /* XXX M_WAIT? */ 2588 p = kmalloc(len, M_TEMP, M_INTWAIT | M_ZERO); 2589 if (p == NULL) 2590 return ENOMEM; 2591 off = 0; 2592 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 2593 if (off >= len) 2594 break; 2595 imr = (struct ieee80211req_mesh_route *) 2596 (p + off); 2597 imr->imr_flags = rt->rt_flags; 2598 IEEE80211_ADDR_COPY(imr->imr_dest, 2599 rt->rt_dest); 2600 IEEE80211_ADDR_COPY(imr->imr_nexthop, 2601 rt->rt_nexthop); 2602 imr->imr_metric = rt->rt_metric; 2603 imr->imr_nhops = rt->rt_nhops; 2604 imr->imr_lifetime = rt->rt_lifetime; 2605 imr->imr_lastmseq = rt->rt_lastmseq; 2606 off += sizeof(*imr); 2607 } 2608 error = copyout(p, (uint8_t *)ireq->i_data, 2609 ireq->i_len); 2610 kfree(p, M_TEMP); 2611 break; 2612 case IEEE80211_MESH_RTCMD_FLUSH: 2613 case IEEE80211_MESH_RTCMD_ADD: 2614 case IEEE80211_MESH_RTCMD_DELETE: 2615 return EINVAL; 2616 default: 2617 return ENOSYS; 2618 } 2619 break; 2620 case IEEE80211_IOC_MESH_PR_METRIC: 2621 len = strlen(ms->ms_pmetric->mpm_descr); 2622 if (ireq->i_len < len) 2623 return EINVAL; 2624 ireq->i_len = len; 2625 error = copyout(ms->ms_pmetric->mpm_descr, 2626 (uint8_t *)ireq->i_data, len); 2627 break; 2628 case IEEE80211_IOC_MESH_PR_PATH: 2629 len = strlen(ms->ms_ppath->mpp_descr); 2630 if (ireq->i_len < len) 2631 return EINVAL; 2632 ireq->i_len = len; 2633 error = copyout(ms->ms_ppath->mpp_descr, 2634 (uint8_t *)ireq->i_data, len); 2635 break; 2636 default: 2637 return ENOSYS; 2638 } 2639 2640 return error; 2641 } 2642 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 2643 2644 static int 2645 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 2646 { 2647 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2648 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 2649 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 2650 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 2651 int error; 2652 2653 if (vap->iv_opmode != IEEE80211_M_MBSS) 2654 return ENOSYS; 2655 2656 error = 0; 2657 switch (ireq->i_type) { 2658 case IEEE80211_IOC_MESH_ID: 2659 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 2660 return EINVAL; 2661 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 2662 if (error != 0) 2663 break; 2664 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 2665 ms->ms_idlen = ireq->i_len; 2666 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 2667 error = ENETRESET; 2668 break; 2669 case IEEE80211_IOC_MESH_AP: 2670 if (ireq->i_val) 2671 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 2672 else 2673 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 2674 error = ENETRESET; 2675 break; 2676 case IEEE80211_IOC_MESH_FWRD: 2677 if (ireq->i_val) 2678 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 2679 else 2680 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 2681 break; 2682 case IEEE80211_IOC_MESH_TTL: 2683 ms->ms_ttl = (uint8_t) ireq->i_val; 2684 break; 2685 case IEEE80211_IOC_MESH_RTCMD: 2686 switch (ireq->i_val) { 2687 case IEEE80211_MESH_RTCMD_LIST: 2688 return EINVAL; 2689 case IEEE80211_MESH_RTCMD_FLUSH: 2690 ieee80211_mesh_rt_flush(vap); 2691 break; 2692 case IEEE80211_MESH_RTCMD_ADD: 2693 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 2694 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 2695 return EINVAL; 2696 error = copyin(ireq->i_data, &tmpaddr, 2697 IEEE80211_ADDR_LEN); 2698 if (error == 0) 2699 ieee80211_mesh_discover(vap, tmpaddr, NULL); 2700 break; 2701 case IEEE80211_MESH_RTCMD_DELETE: 2702 ieee80211_mesh_rt_del(vap, ireq->i_data); 2703 break; 2704 default: 2705 return ENOSYS; 2706 } 2707 break; 2708 case IEEE80211_IOC_MESH_PR_METRIC: 2709 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 2710 if (error == 0) { 2711 error = mesh_select_proto_metric(vap, tmpproto); 2712 if (error == 0) 2713 error = ENETRESET; 2714 } 2715 break; 2716 case IEEE80211_IOC_MESH_PR_PATH: 2717 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 2718 if (error == 0) { 2719 error = mesh_select_proto_path(vap, tmpproto); 2720 if (error == 0) 2721 error = ENETRESET; 2722 } 2723 break; 2724 default: 2725 return ENOSYS; 2726 } 2727 return error; 2728 } 2729 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 2730