ieee80211_mesh.c revision 195618
1/*- 2 * Copyright (c) 2009 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Rui Paulo under sponsorship from the 6 * FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29#include <sys/cdefs.h> 30#ifdef __FreeBSD__ 31__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_mesh.c 195618 2009-07-11 15:02:45Z rpaulo $"); 32#endif 33 34/* 35 * IEEE 802.11s Mesh Point (MBSS) support. 36 * 37 * Based on March 2009, D3.0 802.11s draft spec. 38 */ 39#include "opt_inet.h" 40#include "opt_wlan.h" 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/mbuf.h> 45#include <sys/malloc.h> 46#include <sys/kernel.h> 47 48#include <sys/socket.h> 49#include <sys/sockio.h> 50#include <sys/endian.h> 51#include <sys/errno.h> 52#include <sys/proc.h> 53#include <sys/sysctl.h> 54 55#include <net/if.h> 56#include <net/if_media.h> 57#include <net/if_llc.h> 58#include <net/ethernet.h> 59 60#include <net80211/ieee80211_var.h> 61#include <net80211/ieee80211_action.h> 62#include <net80211/ieee80211_input.h> 63#include <net80211/ieee80211_mesh.h> 64 65static int mesh_select_proto_path(struct ieee80211vap *, const char *); 66static int mesh_select_proto_metric(struct ieee80211vap *, const char *); 67static void mesh_vattach(struct ieee80211vap *); 68static int mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int); 69static __inline void 70 mesh_linkchange(struct ieee80211_node *, 71 enum ieee80211_mesh_mlstate); 72static void mesh_checkid(void *, struct ieee80211_node *); 73static uint32_t mesh_generateid(struct ieee80211vap *); 74static int mesh_checkpseq(struct ieee80211vap *, 75 const uint8_t [IEEE80211_ADDR_LEN], uint32_t); 76static struct ieee80211_node * 77 mesh_find_txnode(struct ieee80211vap *, 78 const uint8_t [IEEE80211_ADDR_LEN]); 79static void mesh_forward(struct ieee80211vap *, struct mbuf *, 80 const struct ieee80211_meshcntl *); 81static int mesh_input(struct ieee80211_node *, struct mbuf *, int, int); 82static void mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int, 83 int, int); 84static void mesh_peer_timeout_setup(struct ieee80211_node *); 85static void mesh_peer_timeout_backoff(struct ieee80211_node *); 86static void mesh_peer_timeout_cb(void *); 87static __inline void 88 mesh_peer_timeout_stop(struct ieee80211_node *); 89static int mesh_verify_meshpeerver(struct ieee80211vap *, const uint8_t *); 90static int mesh_verify_meshid(struct ieee80211vap *, const uint8_t *); 91static int mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *); 92static int mesh_verify_meshpeer(struct ieee80211vap *, const uint8_t *); 93uint32_t mesh_airtime_calc(struct ieee80211_node *); 94 95/* 96 * Timeout values come from the specification and are in milliseconds. 97 */ 98SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0, 99 "IEEE 802.11s parameters"); 100static int ieee80211_mesh_retrytimeout = -1; 101SYSCTL_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)"); 104static int ieee80211_mesh_holdingtimeout = -1; 105SYSCTL_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)"); 108static int ieee80211_mesh_confirmtimeout = -1; 109SYSCTL_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)"); 112static int ieee80211_mesh_maxretries = 2; 113SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW, 114 &ieee80211_mesh_maxretries, 0, 115 "Maximum retries during peer link establishment"); 116 117static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 118 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 119 120static ieee80211_recv_action_func mesh_recv_action_meshpeering_open; 121static ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm; 122static ieee80211_recv_action_func mesh_recv_action_meshpeering_close; 123static ieee80211_recv_action_func mesh_recv_action_meshlmetric_req; 124static ieee80211_recv_action_func mesh_recv_action_meshlmetric_rep; 125 126static ieee80211_send_action_func mesh_send_action_meshpeering_open; 127static ieee80211_send_action_func mesh_send_action_meshpeering_confirm; 128static ieee80211_send_action_func mesh_send_action_meshpeering_close; 129static ieee80211_send_action_func mesh_send_action_meshlink_request; 130static ieee80211_send_action_func mesh_send_action_meshlink_reply; 131 132static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = { 133 .mpm_descr = "AIRTIME", 134 .mpm_ie = IEEE80211_MESHCONF_AIRTIME, 135 .mpm_metric = mesh_airtime_calc, 136}; 137 138static struct ieee80211_mesh_proto_path mesh_proto_paths[4]; 139static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4]; 140 141#define MESH_RT_LOCK(ms) mtx_lock(&(ms)->ms_rt_lock) 142#define MESH_RT_UNLOCK(ms) mtx_unlock(&(ms)->ms_rt_lock) 143 144MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh", "802.11s routing table"); 145 146/* 147 * Helper functions to manipulate the Mesh routing table. 148 */ 149struct ieee80211_mesh_route * 150ieee80211_mesh_rt_find(struct ieee80211vap *vap, 151 const uint8_t dest[IEEE80211_ADDR_LEN]) 152{ 153 struct ieee80211_mesh_state *ms = vap->iv_mesh; 154 struct ieee80211_mesh_route *rt; 155 156 MESH_RT_LOCK(ms); 157 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 158 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest)) { 159 MESH_RT_UNLOCK(ms); 160 return rt; 161 } 162 } 163 MESH_RT_UNLOCK(ms); 164 return NULL; 165} 166 167struct ieee80211_mesh_route * 168ieee80211_mesh_rt_add(struct ieee80211vap *vap, 169 const uint8_t dest[IEEE80211_ADDR_LEN]) 170{ 171 struct ieee80211_mesh_state *ms = vap->iv_mesh; 172 struct ieee80211_mesh_route *rt; 173 174 KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL, 175 ("%s: duplicate entry in the routing table", __func__)); 176 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 177 ("%s: adding self to the routing table", __func__)); 178 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest), 179 ("%s: adding broadcast to the routing table", __func__)); 180 181 rt = malloc(sizeof(struct ieee80211_mesh_route), M_80211_MESH_RT, 182 M_NOWAIT | M_ZERO); 183 IEEE80211_ADDR_COPY(rt->rt_dest, dest); 184 rt->rt_priv = malloc(ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, 185 M_NOWAIT | M_ZERO); 186 MESH_RT_LOCK(ms); 187 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next); 188 MESH_RT_UNLOCK(ms); 189 return rt; 190} 191 192void 193ieee80211_mesh_rt_del(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, *next; 198 199 MESH_RT_LOCK(ms); 200 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 201 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) { 202 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 203 free(rt->rt_priv, M_80211_MESH_RT); 204 free(rt, M_80211_MESH_RT); 205 MESH_RT_UNLOCK(ms); 206 return; 207 } 208 } 209 MESH_RT_UNLOCK(ms); 210} 211 212void 213ieee80211_mesh_rt_flush(struct ieee80211vap *vap) 214{ 215 struct ieee80211_mesh_state *ms = vap->iv_mesh; 216 struct ieee80211_mesh_route *rt, *next; 217 218 if (ms == NULL) 219 return; 220 MESH_RT_LOCK(ms); 221 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) { 222 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next); 223 free(rt->rt_priv, M_80211_MESH_RT); 224 free(rt, M_80211_MESH_RT); 225 } 226 MESH_RT_UNLOCK(ms); 227} 228 229#define N(a) (sizeof(a) / sizeof(a[0])) 230int 231ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp) 232{ 233 int i, firstempty = -1; 234 static const uint8_t emptyie[4] = { 0, 0, 0, 0 }; 235 236 for (i = 0; i < N(mesh_proto_paths); i++) { 237 if (memcmp(mpp->mpp_ie, mesh_proto_paths[i].mpp_ie, 4) == 0) 238 return EEXIST; 239 if (memcmp(mesh_proto_paths[i].mpp_ie, emptyie, 4) == 0 && 240 firstempty == -1) 241 firstempty = i; 242 } 243 if (firstempty < 0) 244 return ENOSPC; 245 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp)); 246 return 0; 247} 248 249int 250ieee80211_mesh_register_proto_metric(const struct 251 ieee80211_mesh_proto_metric *mpm) 252{ 253 int i, firstempty = -1; 254 static const uint8_t emptyie[4] = { 0, 0, 0, 0 }; 255 256 for (i = 0; i < N(mesh_proto_metrics); i++) { 257 if (memcmp(mpm->mpm_ie, mesh_proto_metrics[i].mpm_ie, 4) == 0) 258 return EEXIST; 259 if (memcmp(mesh_proto_metrics[i].mpm_ie, emptyie, 4) == 0 && 260 firstempty == -1) 261 firstempty = i; 262 } 263 if (firstempty < 0) 264 return ENOSPC; 265 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm)); 266 return 0; 267} 268 269static int 270mesh_select_proto_path(struct ieee80211vap *vap, const char *name) 271{ 272 struct ieee80211_mesh_state *ms = vap->iv_mesh; 273 int i; 274 275 for (i = 0; i < N(mesh_proto_paths); i++) { 276 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) { 277 ms->ms_ppath = &mesh_proto_paths[i]; 278 if (vap->iv_state == IEEE80211_S_RUN) 279 vap->iv_newstate(vap, IEEE80211_S_INIT, 0); 280 return 0; 281 } 282 } 283 return ENOENT; 284} 285 286static int 287mesh_select_proto_metric(struct ieee80211vap *vap, const char *name) 288{ 289 struct ieee80211_mesh_state *ms = vap->iv_mesh; 290 int i; 291 292 for (i = 0; i < N(mesh_proto_metrics); i++) { 293 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) { 294 ms->ms_pmetric = &mesh_proto_metrics[i]; 295 if (vap->iv_state == IEEE80211_S_RUN) 296 vap->iv_newstate(vap, IEEE80211_S_INIT, 0); 297 return 0; 298 } 299 } 300 return ENOENT; 301} 302#undef N 303 304static void 305ieee80211_mesh_init(void) 306{ 307 308 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths)); 309 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics)); 310 311 /* 312 * Setup mesh parameters that depends on the clock frequency. 313 */ 314 ieee80211_mesh_retrytimeout = msecs_to_ticks(40); 315 ieee80211_mesh_holdingtimeout = msecs_to_ticks(40); 316 ieee80211_mesh_confirmtimeout = msecs_to_ticks(40); 317 318 /* 319 * Register action frame handlers. 320 */ 321 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 322 IEEE80211_ACTION_MESHPEERING_OPEN, 323 mesh_recv_action_meshpeering_open); 324 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 325 IEEE80211_ACTION_MESHPEERING_CONFIRM, 326 mesh_recv_action_meshpeering_confirm); 327 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 328 IEEE80211_ACTION_MESHPEERING_CLOSE, 329 mesh_recv_action_meshpeering_close); 330 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC, 331 IEEE80211_ACTION_MESHLMETRIC_REQ, mesh_recv_action_meshlmetric_req); 332 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC, 333 IEEE80211_ACTION_MESHLMETRIC_REP, mesh_recv_action_meshlmetric_rep); 334 335 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 336 IEEE80211_ACTION_MESHPEERING_OPEN, 337 mesh_send_action_meshpeering_open); 338 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 339 IEEE80211_ACTION_MESHPEERING_CONFIRM, 340 mesh_send_action_meshpeering_confirm); 341 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING, 342 IEEE80211_ACTION_MESHPEERING_CLOSE, 343 mesh_send_action_meshpeering_close); 344 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC, 345 IEEE80211_ACTION_MESHLMETRIC_REQ, 346 mesh_send_action_meshlink_request); 347 ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC, 348 IEEE80211_ACTION_MESHLMETRIC_REP, 349 mesh_send_action_meshlink_reply); 350 351 /* 352 * Register Airtime Link Metric. 353 */ 354 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime); 355 356} 357SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL); 358 359void 360ieee80211_mesh_attach(struct ieee80211com *ic) 361{ 362 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach; 363} 364 365void 366ieee80211_mesh_detach(struct ieee80211com *ic) 367{ 368} 369 370static void 371mesh_vdetach_peers(void *arg, struct ieee80211_node *ni) 372{ 373 struct ieee80211com *ic = ni->ni_ic; 374 uint16_t args[3]; 375 376 if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) { 377 args[0] = ni->ni_mlpid; 378 args[1] = ni->ni_mllid; 379 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 380 ieee80211_send_action(ni, 381 IEEE80211_ACTION_CAT_MESHPEERING, 382 IEEE80211_ACTION_MESHPEERING_CLOSE, 383 args); 384 } 385 callout_stop(&ni->ni_mltimer); 386 /* XXX belongs in hwmp */ 387 ieee80211_ageq_drain_node(&ic->ic_stageq, 388 (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr)); 389} 390 391static void 392mesh_vdetach(struct ieee80211vap *vap) 393{ 394 struct ieee80211_mesh_state *ms = vap->iv_mesh; 395 396 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers, 397 NULL); 398 ieee80211_mesh_rt_flush(vap); 399 mtx_destroy(&ms->ms_rt_lock); 400 ms->ms_ppath->mpp_vdetach(vap); 401 free(vap->iv_mesh, M_80211_VAP); 402 vap->iv_mesh = NULL; 403} 404 405static void 406mesh_vattach(struct ieee80211vap *vap) 407{ 408 struct ieee80211_mesh_state *ms; 409 vap->iv_newstate = mesh_newstate; 410 vap->iv_input = mesh_input; 411 vap->iv_opdetach = mesh_vdetach; 412 vap->iv_recv_mgmt = mesh_recv_mgmt; 413 ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP, 414 M_NOWAIT | M_ZERO); 415 if (ms == NULL) { 416 printf("%s: couldn't alloc MBSS state\n", __func__); 417 return; 418 } 419 vap->iv_mesh = ms; 420 ms->ms_seq = 0; 421 ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD); 422 ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL; 423 TAILQ_INIT(&ms->ms_routes); 424 mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF); 425 mesh_select_proto_metric(vap, "AIRTIME"); 426 KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL")); 427 mesh_select_proto_path(vap, "HWMP"); 428 KASSERT(ms->ms_ppath, ("ms_ppath == NULL")); 429 ms->ms_ppath->mpp_vattach(vap); 430} 431 432/* 433 * IEEE80211_M_MBSS vap state machine handler. 434 */ 435static int 436mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 437{ 438 struct ieee80211_mesh_state *ms = vap->iv_mesh; 439 struct ieee80211com *ic = vap->iv_ic; 440 struct ieee80211_node *ni; 441 enum ieee80211_state ostate; 442 443 IEEE80211_LOCK_ASSERT(ic); 444 445 ostate = vap->iv_state; 446 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 447 __func__, ieee80211_state_name[ostate], 448 ieee80211_state_name[nstate], arg); 449 vap->iv_state = nstate; /* state transition */ 450 if (ostate != IEEE80211_S_SCAN) 451 ieee80211_cancel_scan(vap); /* background scan */ 452 ni = vap->iv_bss; /* NB: no reference held */ 453 /* Flush the routing table */ 454 if (nstate != IEEE80211_S_INIT && ostate == IEEE80211_S_INIT) 455 ieee80211_mesh_rt_flush(vap); 456 switch (nstate) { 457 case IEEE80211_S_INIT: 458 switch (ostate) { 459 case IEEE80211_S_SCAN: 460 ieee80211_cancel_scan(vap); 461 break; 462 case IEEE80211_S_CAC: 463 ieee80211_dfs_cac_stop(vap); 464 break; 465 case IEEE80211_S_RUN: 466 ieee80211_iterate_nodes(&ic->ic_sta, 467 mesh_vdetach_peers, NULL); 468 break; 469 default: 470 break; 471 } 472 if (ostate != IEEE80211_S_INIT) { 473 /* NB: optimize INIT -> INIT case */ 474 ieee80211_reset_bss(vap); 475 } 476 break; 477 case IEEE80211_S_SCAN: 478 switch (ostate) { 479 case IEEE80211_S_INIT: 480 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC && 481 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) && 482 ms->ms_idlen != 0) { 483 /* 484 * Already have a channel and a mesh ID; bypass 485 * the scan and startup immediately. 486 */ 487 ieee80211_create_ibss(vap, vap->iv_des_chan); 488 break; 489 } 490 /* 491 * Initiate a scan. We can come here as a result 492 * of an IEEE80211_IOC_SCAN_REQ too in which case 493 * the vap will be marked with IEEE80211_FEXT_SCANREQ 494 * and the scan request parameters will be present 495 * in iv_scanreq. Otherwise we do the default. 496 */ 497 if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 498 ieee80211_check_scan(vap, 499 vap->iv_scanreq_flags, 500 vap->iv_scanreq_duration, 501 vap->iv_scanreq_mindwell, 502 vap->iv_scanreq_maxdwell, 503 vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 504 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 505 } else 506 ieee80211_check_scan_current(vap); 507 break; 508 default: 509 break; 510 } 511 break; 512 case IEEE80211_S_CAC: 513 /* 514 * Start CAC on a DFS channel. We come here when starting 515 * a bss on a DFS channel (see ieee80211_create_ibss). 516 */ 517 ieee80211_dfs_cac_start(vap); 518 break; 519 case IEEE80211_S_RUN: 520 switch (ostate) { 521 case IEEE80211_S_INIT: 522 /* 523 * Already have a channel; bypass the 524 * scan and startup immediately. 525 * Note that ieee80211_create_ibss will call 526 * back to do a RUN->RUN state change. 527 */ 528 ieee80211_create_ibss(vap, 529 ieee80211_ht_adjust_channel(ic, 530 ic->ic_curchan, vap->iv_flags_ht)); 531 /* NB: iv_bss is changed on return */ 532 break; 533 case IEEE80211_S_CAC: 534 /* 535 * NB: This is the normal state change when CAC 536 * expires and no radar was detected; no need to 537 * clear the CAC timer as it's already expired. 538 */ 539 /* fall thru... */ 540 case IEEE80211_S_CSA: 541#if 0 542 /* 543 * Shorten inactivity timer of associated stations 544 * to weed out sta's that don't follow a CSA. 545 */ 546 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap); 547#endif 548 /* 549 * Update bss node channel to reflect where 550 * we landed after CSA. 551 */ 552 ieee80211_node_set_chan(vap->iv_bss, 553 ieee80211_ht_adjust_channel(ic, ic->ic_curchan, 554 ieee80211_htchanflags(vap->iv_bss->ni_chan))); 555 /* XXX bypass debug msgs */ 556 break; 557 case IEEE80211_S_SCAN: 558 case IEEE80211_S_RUN: 559#ifdef IEEE80211_DEBUG 560 if (ieee80211_msg_debug(vap)) { 561 struct ieee80211_node *ni = vap->iv_bss; 562 ieee80211_note(vap, 563 "synchronized with %s meshid ", 564 ether_sprintf(ni->ni_meshid)); 565 ieee80211_print_essid(ni->ni_meshid, 566 ni->ni_meshidlen); 567 /* XXX MCS/HT */ 568 printf(" channel %d\n", 569 ieee80211_chan2ieee(ic, ic->ic_curchan)); 570 } 571#endif 572 break; 573 default: 574 break; 575 } 576 ieee80211_node_authorize(vap->iv_bss); 577 break; 578 default: 579 break; 580 } 581 582 /* NB: ostate not nstate */ 583 ms->ms_ppath->mpp_newstate(vap, ostate, arg); 584 585 return 0; 586} 587 588/* 589 * Helper function to note the Mesh Peer Link FSM change. 590 */ 591static void 592mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state) 593{ 594 struct ieee80211vap *vap = ni->ni_vap; 595 struct ieee80211_mesh_state *ms = vap->iv_mesh; 596#ifdef IEEE80211_DEBUG 597 static const char *meshlinkstates[] = { 598 [IEEE80211_NODE_MESH_IDLE] = "IDLE", 599 [IEEE80211_NODE_MESH_OPENSNT] = "OPEN SENT", 600 [IEEE80211_NODE_MESH_OPENRCV] = "OPEN RECEIVED", 601 [IEEE80211_NODE_MESH_CONFIRMRCV] = "CONFIRM RECEIVED", 602 [IEEE80211_NODE_MESH_ESTABLISHED] = "ESTABLISHED", 603 [IEEE80211_NODE_MESH_HOLDING] = "HOLDING" 604 }; 605#endif 606 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, 607 ni, "peer link: %s -> %s", 608 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]); 609 610 /* track neighbor count */ 611 if (state == IEEE80211_NODE_MESH_ESTABLISHED && 612 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 613 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow")); 614 ms->ms_neighbors++; 615 } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED && 616 state != IEEE80211_NODE_MESH_ESTABLISHED) { 617 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0")); 618 ms->ms_neighbors--; 619 } 620 ni->ni_mlstate = state; 621 if (state == IEEE80211_NODE_MESH_HOLDING) 622 ms->ms_ppath->mpp_peerdown(ni); 623} 624 625/* 626 * Helper function to generate a unique local ID required for mesh 627 * peer establishment. 628 */ 629static void 630mesh_checkid(void *arg, struct ieee80211_node *ni) 631{ 632 uint16_t *r = arg; 633 634 if (*r == ni->ni_mllid) 635 *(uint16_t *)arg = 0; 636} 637 638static uint32_t 639mesh_generateid(struct ieee80211vap *vap) 640{ 641 int maxiter = 4; 642 uint16_t r; 643 644 do { 645 get_random_bytes(&r, 2); 646 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r); 647 maxiter--; 648 } while (r == 0 && maxiter > 0); 649 return r; 650} 651 652/* 653 * Verifies if we already received this packet by checking its 654 * sequence number. 655 */ 656static int 657mesh_checkpseq(struct ieee80211vap *vap, 658 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq) 659{ 660 struct ieee80211_mesh_route *rt; 661 662 rt = ieee80211_mesh_rt_find(vap, source); 663 if (rt == NULL) { 664 rt = ieee80211_mesh_rt_add(vap, source); 665 rt->rt_lastmseq = seq; 666 return 0; 667 } 668 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) { 669 return 1; 670 } else { 671 rt->rt_lastmseq = seq; 672 return 0; 673 } 674} 675 676/* 677 * Iterate the routing table and locate the next hop. 678 */ 679static struct ieee80211_node * 680mesh_find_txnode(struct ieee80211vap *vap, 681 const uint8_t dest[IEEE80211_ADDR_LEN]) 682{ 683 struct ieee80211_mesh_route *rt; 684 685 rt = ieee80211_mesh_rt_find(vap, dest); 686 if (rt == NULL) 687 return NULL; 688 return ieee80211_find_txnode(vap, rt->rt_nexthop); 689} 690 691/* 692 * Forward the specified frame. 693 * Decrement the TTL and set TA to our MAC address. 694 */ 695static void 696mesh_forward(struct ieee80211vap *vap, struct mbuf *m, 697 const struct ieee80211_meshcntl *mc) 698{ 699 struct ieee80211com *ic = vap->iv_ic; 700 struct ieee80211_mesh_state *ms = vap->iv_mesh; 701 struct ifnet *ifp = vap->iv_ifp; 702 struct ifnet *parent = ic->ic_ifp; 703 const struct ieee80211_frame *wh = 704 mtod(m, const struct ieee80211_frame *); 705 struct mbuf *mcopy; 706 struct ieee80211_meshcntl *mccopy; 707 struct ieee80211_frame *whcopy; 708 struct ieee80211_node *ni; 709 int err; 710 711 if (mc->mc_ttl == 0) { 712 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 713 "%s", "frame not fwd'd, ttl 0"); 714 vap->iv_stats.is_mesh_fwd_ttl++; 715 return; 716 } 717 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 718 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 719 "%s", "frame not fwd'd, fwding disabled"); 720 vap->iv_stats.is_mesh_fwd_disabled++; 721 return; 722 } 723 mcopy = m_dup(m, M_DONTWAIT); 724 if (mcopy == NULL) { 725 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 726 "%s", "frame not fwd'd, cannot dup"); 727 vap->iv_stats.is_mesh_fwd_nobuf++; 728 ifp->if_oerrors++; 729 return; 730 } 731 mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) + 732 sizeof(struct ieee80211_meshcntl)); 733 if (mcopy == NULL) { 734 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 735 "%s", "frame not fwd'd, too short"); 736 vap->iv_stats.is_mesh_fwd_tooshort++; 737 ifp->if_oerrors++; 738 m_freem(mcopy); 739 return; 740 } 741 whcopy = mtod(mcopy, struct ieee80211_frame *); 742 mccopy = (struct ieee80211_meshcntl *) 743 (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh)); 744 /* XXX clear other bits? */ 745 whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY; 746 IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr); 747 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 748 ni = ieee80211_ref_node(vap->iv_bss); 749 mcopy->m_flags |= M_MCAST; 750 } else { 751 ni = mesh_find_txnode(vap, whcopy->i_addr3); 752 if (ni == NULL) { 753 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh, 754 "%s", "frame not fwd'd, no path"); 755 vap->iv_stats.is_mesh_fwd_nopath++; 756 m_freem(mcopy); 757 return; 758 } 759 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr); 760 } 761 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, ni, 762 "fwd %s frame from %s ttl %d", 763 IEEE80211_IS_MULTICAST(wh->i_addr1) ? "mcast" : "ucast", 764 ether_sprintf(wh->i_addr3), mccopy->mc_ttl); 765 766 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__)); 767 mccopy->mc_ttl--; 768 769 /* XXX calculate priority so drivers can find the tx queue */ 770 M_WME_SETAC(mcopy, WME_AC_BE); 771 772 /* XXX do we know m_nextpkt is NULL? */ 773 mcopy->m_pkthdr.rcvif = (void *) ni; 774 err = parent->if_transmit(parent, mcopy); 775 if (err != 0) { 776 /* NB: IFQ_HANDOFF reclaims mbuf */ 777 ieee80211_free_node(ni); 778 } else { 779 ifp->if_opackets++; 780 } 781} 782 783static int 784mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 785{ 786#define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0) 787#define HAS_SEQ(type) ((type & 0x4) == 0) 788 struct ieee80211vap *vap = ni->ni_vap; 789 struct ieee80211com *ic = ni->ni_ic; 790 struct ifnet *ifp = vap->iv_ifp; 791 struct ieee80211_frame *wh; 792 const struct ieee80211_meshcntl *mc; 793 int hdrspace, need_tap; 794 uint8_t dir, type, subtype, qos; 795 uint32_t seq; 796 uint8_t *addr; 797 ieee80211_seq rxseq; 798 799 KASSERT(ni != NULL, ("null node")); 800 ni->ni_inact = ni->ni_inact_reload; 801 802 need_tap = 1; /* mbuf need to be tapped. */ 803 type = -1; /* undefined */ 804 805 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 806 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 807 ni->ni_macaddr, NULL, 808 "too short (1): len %u", m->m_pkthdr.len); 809 vap->iv_stats.is_rx_tooshort++; 810 goto out; 811 } 812 /* 813 * Bit of a cheat here, we use a pointer for a 3-address 814 * frame format but don't reference fields past outside 815 * ieee80211_frame_min w/o first validating the data is 816 * present. 817 */ 818 wh = mtod(m, struct ieee80211_frame *); 819 820 if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 821 IEEE80211_FC0_VERSION_0) { 822 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 823 ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]); 824 vap->iv_stats.is_rx_badversion++; 825 goto err; 826 } 827 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 828 type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 829 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 830 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 831 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 832 ni->ni_noise = nf; 833 if (HAS_SEQ(type)) { 834 uint8_t tid = ieee80211_gettid(wh); 835 836 if (IEEE80211_QOS_HAS_SEQ(wh) && 837 TID_TO_WME_AC(tid) >= WME_AC_VI) 838 ic->ic_wme.wme_hipri_traffic++; 839 rxseq = le16toh(*(uint16_t *)wh->i_seq); 840 if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 && 841 (wh->i_fc[1] & IEEE80211_FC1_RETRY) && 842 SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) { 843 /* duplicate, discard */ 844 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 845 wh->i_addr1, "duplicate", 846 "seqno <%u,%u> fragno <%u,%u> tid %u", 847 rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 848 ni->ni_rxseqs[tid] >> 849 IEEE80211_SEQ_SEQ_SHIFT, 850 rxseq & IEEE80211_SEQ_FRAG_MASK, 851 ni->ni_rxseqs[tid] & 852 IEEE80211_SEQ_FRAG_MASK, 853 tid); 854 vap->iv_stats.is_rx_dup++; 855 IEEE80211_NODE_STAT(ni, rx_dup); 856 goto out; 857 } 858 ni->ni_rxseqs[tid] = rxseq; 859 } 860 } 861#ifdef IEEE80211_DEBUG 862 /* 863 * It's easier, but too expensive, to simulate different mesh 864 * topologies by consulting the ACL policy very early, so do this 865 * only under DEBUG. 866 * 867 * NB: this check is also done upon peering link initiation. 868 */ 869 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh->i_addr2)) { 870 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 871 wh, NULL, "%s", "disallowed by ACL"); 872 vap->iv_stats.is_rx_acl++; 873 goto out; 874 } 875#endif 876 switch (type) { 877 case IEEE80211_FC0_TYPE_DATA: 878 if (ni == vap->iv_bss) 879 goto out; 880 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) { 881 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 882 ni->ni_macaddr, NULL, 883 "peer link not yet established (%d)", 884 ni->ni_mlstate); 885 vap->iv_stats.is_mesh_nolink++; 886 goto out; 887 } 888 if (dir != IEEE80211_FC1_DIR_FROMDS && 889 dir != IEEE80211_FC1_DIR_DSTODS) { 890 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 891 wh, "data", "incorrect dir 0x%x", dir); 892 vap->iv_stats.is_rx_wrongdir++; 893 goto err; 894 } 895 /* pull up enough to get to the mesh control */ 896 hdrspace = ieee80211_hdrspace(ic, wh); 897 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) && 898 (m = m_pullup(m, hdrspace + 899 sizeof(struct ieee80211_meshcntl))) == NULL) { 900 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 901 ni->ni_macaddr, NULL, 902 "data too short: expecting %u", hdrspace); 903 vap->iv_stats.is_rx_tooshort++; 904 goto out; /* XXX */ 905 } 906 /* 907 * Now calculate the full extent of the headers. Note 908 * ieee80211_decap will pull up anything we didn't get 909 * above when it strips the 802.11 headers. 910 */ 911 mc = (const struct ieee80211_meshcntl *) 912 (mtod(m, const uint8_t *) + hdrspace); 913 hdrspace += sizeof(struct ieee80211_meshcntl) + 914 (mc->mc_flags & 3) * IEEE80211_ADDR_LEN; 915 seq = LE_READ_4(mc->mc_seq); 916 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 917 addr = wh->i_addr3; 918 else 919 addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4; 920 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) { 921 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 922 addr, "data", "%s", "not to me"); 923 vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */ 924 goto out; 925 } 926 if (mesh_checkpseq(vap, addr, seq) != 0) { 927 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH, 928 addr, "data", "duplicate mesh seqno %u ttl %u", 929 seq, mc->mc_ttl); 930 vap->iv_stats.is_rx_dup++; 931 goto out; 932 } 933 934 /* 935 * Potentially forward packet. See table s36 (p140) 936 * for the rules. XXX tap fwd'd packets not for us? 937 */ 938 if (dir == IEEE80211_FC1_DIR_FROMDS || 939 !IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr)) { 940 mesh_forward(vap, m, mc); 941 if (dir == IEEE80211_FC1_DIR_DSTODS) 942 goto out; 943 /* NB: fall thru to deliver mcast frames locally */ 944 } 945 946 /* 947 * Save QoS bits for use below--before we strip the header. 948 */ 949 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 950 qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 951 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 952 ((struct ieee80211_qosframe *)wh)->i_qos[0]; 953 } else 954 qos = 0; 955 /* 956 * Next up, any fragmentation. 957 */ 958 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 959 m = ieee80211_defrag(ni, m, hdrspace); 960 if (m == NULL) { 961 /* Fragment dropped or frame not complete yet */ 962 goto out; 963 } 964 } 965 wh = NULL; /* no longer valid, catch any uses */ 966 967 if (ieee80211_radiotap_active_vap(vap)) 968 ieee80211_radiotap_rx(vap, m); 969 need_tap = 0; 970 971 /* 972 * Finally, strip the 802.11 header. 973 */ 974 m = ieee80211_decap(vap, m, hdrspace); 975 if (m == NULL) { 976 /* XXX mask bit to check for both */ 977 /* don't count Null data frames as errors */ 978 if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 979 subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 980 goto out; 981 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 982 ni->ni_macaddr, "data", "%s", "decap error"); 983 vap->iv_stats.is_rx_decap++; 984 IEEE80211_NODE_STAT(ni, rx_decap); 985 goto err; 986 } 987 if (qos & IEEE80211_QOS_AMSDU) { 988 m = ieee80211_decap_amsdu(ni, m); 989 if (m == NULL) 990 return IEEE80211_FC0_TYPE_DATA; 991 } else { 992#ifdef IEEE80211_SUPPORT_SUPERG 993 m = ieee80211_decap_fastframe(vap, ni, m); 994 if (m == NULL) 995 return IEEE80211_FC0_TYPE_DATA; 996#endif 997 } 998 ieee80211_deliver_data(vap, ni, m); 999 return type; 1000 case IEEE80211_FC0_TYPE_MGT: 1001 vap->iv_stats.is_rx_mgmt++; 1002 IEEE80211_NODE_STAT(ni, rx_mgmt); 1003 if (dir != IEEE80211_FC1_DIR_NODS) { 1004 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1005 wh, "mgt", "incorrect dir 0x%x", dir); 1006 vap->iv_stats.is_rx_wrongdir++; 1007 goto err; 1008 } 1009 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 1010 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1011 ni->ni_macaddr, "mgt", "too short: len %u", 1012 m->m_pkthdr.len); 1013 vap->iv_stats.is_rx_tooshort++; 1014 goto out; 1015 } 1016#ifdef IEEE80211_DEBUG 1017 if ((ieee80211_msg_debug(vap) && 1018 (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) || 1019 ieee80211_msg_dumppkts(vap)) { 1020 if_printf(ifp, "received %s from %s rssi %d\n", 1021 ieee80211_mgt_subtype_name[subtype >> 1022 IEEE80211_FC0_SUBTYPE_SHIFT], 1023 ether_sprintf(wh->i_addr2), rssi); 1024 } 1025#endif 1026 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1027 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1028 wh, NULL, "%s", "WEP set but not permitted"); 1029 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 1030 goto out; 1031 } 1032 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 1033 goto out; 1034 case IEEE80211_FC0_TYPE_CTL: 1035 vap->iv_stats.is_rx_ctl++; 1036 IEEE80211_NODE_STAT(ni, rx_ctrl); 1037 goto out; 1038 default: 1039 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1040 wh, "bad", "frame type 0x%x", type); 1041 /* should not come here */ 1042 break; 1043 } 1044err: 1045 ifp->if_ierrors++; 1046out: 1047 if (m != NULL) { 1048 if (need_tap && ieee80211_radiotap_active_vap(vap)) 1049 ieee80211_radiotap_rx(vap, m); 1050 m_freem(m); 1051 } 1052 return type; 1053} 1054 1055static void 1056mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1057 int rssi, int nf) 1058{ 1059 struct ieee80211vap *vap = ni->ni_vap; 1060 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1061 struct ieee80211com *ic = ni->ni_ic; 1062 struct ieee80211_frame *wh; 1063 uint8_t *frm, *efrm; 1064 1065 wh = mtod(m0, struct ieee80211_frame *); 1066 frm = (uint8_t *)&wh[1]; 1067 efrm = mtod(m0, uint8_t *) + m0->m_len; 1068 switch (subtype) { 1069 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1070 case IEEE80211_FC0_SUBTYPE_BEACON: 1071 { 1072 struct ieee80211_scanparams scan; 1073 /* 1074 * We process beacon/probe response 1075 * frames to discover neighbors. 1076 */ 1077 if (ieee80211_parse_beacon(ni, m0, &scan) != 0) 1078 return; 1079 /* 1080 * Count frame now that we know it's to be processed. 1081 */ 1082 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1083 vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1084 IEEE80211_NODE_STAT(ni, rx_beacons); 1085 } else 1086 IEEE80211_NODE_STAT(ni, rx_proberesp); 1087 /* 1088 * If scanning, just pass information to the scan module. 1089 */ 1090 if (ic->ic_flags & IEEE80211_F_SCAN) { 1091 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1092 /* 1093 * Actively scanning a channel marked passive; 1094 * send a probe request now that we know there 1095 * is 802.11 traffic present. 1096 * 1097 * XXX check if the beacon we recv'd gives 1098 * us what we need and suppress the probe req 1099 */ 1100 ieee80211_probe_curchan(vap, 1); 1101 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1102 } 1103 ieee80211_add_scan(vap, &scan, wh, 1104 subtype, rssi, nf); 1105 return; 1106 } 1107 1108 /* The rest of this code assumes we are running */ 1109 if (vap->iv_state != IEEE80211_S_RUN) 1110 return; 1111 /* 1112 * Ignore non-mesh STAs. 1113 */ 1114 if ((scan.capinfo & 1115 (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) || 1116 scan.meshid == NULL || scan.meshconf == NULL) { 1117 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1118 wh, "beacon", "%s", "not a mesh sta"); 1119 vap->iv_stats.is_mesh_wrongmesh++; 1120 return; 1121 } 1122 /* 1123 * Ignore STAs for other mesh networks. 1124 */ 1125 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 || 1126 mesh_verify_meshconf(vap, scan.meshconf)) { 1127 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1128 wh, "beacon", "%s", "not for our mesh"); 1129 vap->iv_stats.is_mesh_wrongmesh++; 1130 return; 1131 } 1132 /* 1133 * Peer only based on the current ACL policy. 1134 */ 1135 if (vap->iv_acl != NULL && 1136 !vap->iv_acl->iac_check(vap, wh->i_addr2)) { 1137 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL, 1138 wh, NULL, "%s", "disallowed by ACL"); 1139 vap->iv_stats.is_rx_acl++; 1140 return; 1141 } 1142 /* 1143 * Do neighbor discovery. 1144 */ 1145 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) { 1146 /* 1147 * Create a new entry in the neighbor table. 1148 */ 1149 ni = ieee80211_add_neighbor(vap, wh, &scan); 1150 } 1151 /* 1152 * Automatically peer with discovered nodes if possible. 1153 * XXX backoff on repeated failure 1154 */ 1155 if (ni != vap->iv_bss && 1156 (ms->ms_flags & IEEE80211_MESHFLAGS_AP) && 1157 ni->ni_mlstate == IEEE80211_NODE_MESH_IDLE) { 1158 uint16_t args[1]; 1159 1160 ni->ni_mlpid = mesh_generateid(vap); 1161 if (ni->ni_mlpid == 0) 1162 return; 1163 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT); 1164 args[0] = ni->ni_mlpid; 1165 ieee80211_send_action(ni, 1166 IEEE80211_ACTION_CAT_MESHPEERING, 1167 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1168 ni->ni_mlrcnt = 0; 1169 mesh_peer_timeout_setup(ni); 1170 } 1171 break; 1172 } 1173 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1174 { 1175 uint8_t *ssid, *meshid, *rates, *xrates; 1176 uint8_t *sfrm; 1177 1178 if (vap->iv_state != IEEE80211_S_RUN) { 1179 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1180 wh, NULL, "wrong state %s", 1181 ieee80211_state_name[vap->iv_state]); 1182 vap->iv_stats.is_rx_mgtdiscard++; 1183 return; 1184 } 1185 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) { 1186 /* frame must be directed */ 1187 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1188 wh, NULL, "%s", "not unicast"); 1189 vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */ 1190 return; 1191 } 1192 /* 1193 * prreq frame format 1194 * [tlv] ssid 1195 * [tlv] supported rates 1196 * [tlv] extended supported rates 1197 * [tlv] mesh id 1198 */ 1199 ssid = meshid = rates = xrates = NULL; 1200 sfrm = frm; 1201 while (efrm - frm > 1) { 1202 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1203 switch (*frm) { 1204 case IEEE80211_ELEMID_SSID: 1205 ssid = frm; 1206 break; 1207 case IEEE80211_ELEMID_RATES: 1208 rates = frm; 1209 break; 1210 case IEEE80211_ELEMID_XRATES: 1211 xrates = frm; 1212 break; 1213 case IEEE80211_ELEMID_MESHID: 1214 meshid = frm; 1215 break; 1216 } 1217 frm += frm[2] + 2; 1218 } 1219 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return); 1220 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1221 if (xrates != NULL) 1222 IEEE80211_VERIFY_ELEMENT(xrates, 1223 IEEE80211_RATE_MAXSIZE - rates[1], return); 1224 if (meshid != NULL) 1225 IEEE80211_VERIFY_ELEMENT(meshid, 1226 IEEE80211_MESHID_LEN, return); 1227 /* NB: meshid, not ssid */ 1228 IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return); 1229 1230 /* XXX find a better class or define it's own */ 1231 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2, 1232 "%s", "recv probe req"); 1233 /* 1234 * Some legacy 11b clients cannot hack a complete 1235 * probe response frame. When the request includes 1236 * only a bare-bones rate set, communicate this to 1237 * the transmit side. 1238 */ 1239 ieee80211_send_proberesp(vap, wh->i_addr2, 0); 1240 break; 1241 } 1242 case IEEE80211_FC0_SUBTYPE_ACTION: 1243 if (vap->iv_state != IEEE80211_S_RUN) { 1244 vap->iv_stats.is_rx_mgtdiscard++; 1245 break; 1246 } 1247 /* 1248 * We received an action for an unknown neighbor. 1249 * XXX: wait for it to beacon or create ieee80211_node? 1250 */ 1251 if (ni == vap->iv_bss) { 1252 IEEE80211_DISCARD(vap, IEEE80211_MSG_MESH, 1253 wh, NULL, "%s", "unknown node"); 1254 vap->iv_stats.is_rx_mgtdiscard++; 1255 break; 1256 } 1257 /* 1258 * Discard if not for us. 1259 */ 1260 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1261 !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1262 IEEE80211_DISCARD(vap, IEEE80211_MSG_MESH, 1263 wh, NULL, "%s", "not for me"); 1264 vap->iv_stats.is_rx_mgtdiscard++; 1265 break; 1266 } 1267 /* XXX parse_action is a bit useless now */ 1268 if (ieee80211_parse_action(ni, m0) == 0) 1269 ic->ic_recv_action(ni, wh, frm, efrm); 1270 break; 1271 case IEEE80211_FC0_SUBTYPE_AUTH: 1272 case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1273 case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1274 case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1275 case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: 1276 case IEEE80211_FC0_SUBTYPE_DEAUTH: 1277 case IEEE80211_FC0_SUBTYPE_DISASSOC: 1278 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1279 wh, NULL, "%s", "not handled"); 1280 vap->iv_stats.is_rx_mgtdiscard++; 1281 return; 1282 default: 1283 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1284 wh, "mgt", "subtype 0x%x not handled", subtype); 1285 vap->iv_stats.is_rx_badsubtype++; 1286 break; 1287 } 1288} 1289 1290/* 1291 * Parse meshpeering action ie's for open+confirm frames; the 1292 * important bits are returned in the supplied structure. 1293 */ 1294static const struct ieee80211_meshpeer_ie * 1295mesh_parse_meshpeering_action(struct ieee80211_node *ni, 1296 const struct ieee80211_frame *wh, /* XXX for VERIFY_LENGTH */ 1297 const uint8_t *frm, const uint8_t *efrm, 1298 struct ieee80211_meshpeer_ie *mp) 1299{ 1300 struct ieee80211vap *vap = ni->ni_vap; 1301 const struct ieee80211_meshpeer_ie *mpie; 1302 const uint8_t *meshid, *meshconf, *meshpeerver, *meshpeer; 1303 1304 meshid = meshconf = meshpeerver = meshpeer = NULL; 1305 while (efrm - frm > 1) { 1306 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL); 1307 switch (*frm) { 1308 case IEEE80211_ELEMID_MESHPEERVER: 1309 meshpeerver = frm; 1310 break; 1311 case IEEE80211_ELEMID_MESHID: 1312 meshid = frm; 1313 break; 1314 case IEEE80211_ELEMID_MESHCONF: 1315 meshconf = frm; 1316 break; 1317 case IEEE80211_ELEMID_MESHPEER: 1318 meshpeer = frm; 1319 mpie = (const struct ieee80211_meshpeer_ie *) frm; 1320 memset(mp, 0, sizeof(*mp)); 1321 mp->peer_subtype = mpie->peer_subtype; 1322 mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid); 1323 /* NB: peer link ID is optional on these frames */ 1324 if (mpie->peer_subtype == 1325 IEEE80211_MESH_PEER_LINK_CLOSE && 1326 mpie->peer_len == 5) { 1327 mp->peer_linkid = 0; 1328 mp->peer_rcode = LE_READ_2(&mpie->peer_linkid); 1329 } else { 1330 mp->peer_linkid = LE_READ_2(&mpie->peer_linkid); 1331 mp->peer_rcode = LE_READ_2(&mpie->peer_rcode); 1332 } 1333 break; 1334 } 1335 frm += frm[1] + 2; 1336 } 1337 1338 /* 1339 * Verify the contents of the frame. Action frames with 1340 * close subtype don't have a Mesh Configuration IE. 1341 * If if fails validation, close the peer link. 1342 */ 1343 KASSERT(meshpeer != NULL && mp->peer_subtype != 1344 IEEE80211_ACTION_MESHPEERING_CLOSE, ("parsing close action")); 1345 1346 if (mesh_verify_meshpeerver(vap, meshpeerver) || 1347 mesh_verify_meshid(vap, meshid) || 1348 mesh_verify_meshpeer(vap, meshpeer) || 1349 mesh_verify_meshconf(vap, meshconf)) { 1350 uint16_t args[3]; 1351 1352 IEEE80211_DISCARD(vap, 1353 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1354 wh, NULL, "%s", "not for our mesh"); 1355 vap->iv_stats.is_rx_mgtdiscard++; 1356 switch (ni->ni_mlstate) { 1357 case IEEE80211_NODE_MESH_IDLE: 1358 case IEEE80211_NODE_MESH_ESTABLISHED: 1359 case IEEE80211_NODE_MESH_HOLDING: 1360 /* ignore */ 1361 break; 1362 case IEEE80211_NODE_MESH_OPENSNT: 1363 case IEEE80211_NODE_MESH_OPENRCV: 1364 case IEEE80211_NODE_MESH_CONFIRMRCV: 1365 args[0] = ni->ni_mlpid; 1366 args[1] = ni->ni_mllid; 1367 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1368 ieee80211_send_action(ni, 1369 IEEE80211_ACTION_CAT_MESHPEERING, 1370 IEEE80211_ACTION_MESHPEERING_CLOSE, 1371 args); 1372 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1373 mesh_peer_timeout_setup(ni); 1374 break; 1375 } 1376 return NULL; 1377 } 1378 return (const struct ieee80211_meshpeer_ie *) mp; 1379} 1380 1381static int 1382mesh_recv_action_meshpeering_open(struct ieee80211_node *ni, 1383 const struct ieee80211_frame *wh, 1384 const uint8_t *frm, const uint8_t *efrm) 1385{ 1386 struct ieee80211vap *vap = ni->ni_vap; 1387 struct ieee80211_meshpeer_ie ie; 1388 const struct ieee80211_meshpeer_ie *meshpeer; 1389 uint16_t args[3]; 1390 1391 /* +2+2 for action + code + capabilites */ 1392 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie); 1393 if (meshpeer == NULL) { 1394 return 0; 1395 } 1396 1397 /* XXX move up */ 1398 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1399 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid); 1400 1401 switch (ni->ni_mlstate) { 1402 case IEEE80211_NODE_MESH_IDLE: 1403 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 1404 ni->ni_mllid = meshpeer->peer_llinkid; 1405 ni->ni_mlpid = mesh_generateid(vap); 1406 if (ni->ni_mlpid == 0) 1407 return 0; /* XXX */ 1408 args[0] = ni->ni_mlpid; 1409 /* Announce we're open too... */ 1410 ieee80211_send_action(ni, 1411 IEEE80211_ACTION_CAT_MESHPEERING, 1412 IEEE80211_ACTION_MESHPEERING_OPEN, args); 1413 /* ...and confirm the link. */ 1414 args[0] = ni->ni_mlpid; 1415 args[1] = ni->ni_mllid; 1416 ieee80211_send_action(ni, 1417 IEEE80211_ACTION_CAT_MESHPEERING, 1418 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1419 args); 1420 mesh_peer_timeout_setup(ni); 1421 break; 1422 case IEEE80211_NODE_MESH_OPENRCV: 1423 /* Wrong Link ID */ 1424 if (ni->ni_mllid != meshpeer->peer_llinkid) { 1425 args[0] = ni->ni_mllid; 1426 args[1] = ni->ni_mlpid; 1427 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1428 ieee80211_send_action(ni, 1429 IEEE80211_ACTION_CAT_MESHPEERING, 1430 IEEE80211_ACTION_MESHPEERING_CLOSE, 1431 args); 1432 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1433 mesh_peer_timeout_setup(ni); 1434 break; 1435 } 1436 /* Duplicate open, confirm again. */ 1437 args[0] = ni->ni_mlpid; 1438 args[1] = ni->ni_mllid; 1439 ieee80211_send_action(ni, 1440 IEEE80211_ACTION_CAT_MESHPEERING, 1441 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1442 args); 1443 break; 1444 case IEEE80211_NODE_MESH_OPENSNT: 1445 ni->ni_mllid = meshpeer->peer_llinkid; 1446 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV); 1447 args[0] = ni->ni_mlpid; 1448 args[1] = ni->ni_mllid; 1449 ieee80211_send_action(ni, 1450 IEEE80211_ACTION_CAT_MESHPEERING, 1451 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1452 args); 1453 /* NB: don't setup/clear any timeout */ 1454 break; 1455 case IEEE80211_NODE_MESH_CONFIRMRCV: 1456 if (ni->ni_mlpid != meshpeer->peer_linkid || 1457 ni->ni_mllid != meshpeer->peer_llinkid) { 1458 args[0] = ni->ni_mlpid; 1459 args[1] = ni->ni_mllid; 1460 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1461 ieee80211_send_action(ni, 1462 IEEE80211_ACTION_CAT_MESHPEERING, 1463 IEEE80211_ACTION_MESHPEERING_CLOSE, 1464 args); 1465 mesh_linkchange(ni, 1466 IEEE80211_NODE_MESH_HOLDING); 1467 mesh_peer_timeout_setup(ni); 1468 break; 1469 } 1470 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 1471 ni->ni_mllid = meshpeer->peer_llinkid; 1472 args[0] = ni->ni_mlpid; 1473 args[1] = ni->ni_mllid; 1474 ieee80211_send_action(ni, 1475 IEEE80211_ACTION_CAT_MESHPEERING, 1476 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1477 args); 1478 mesh_peer_timeout_stop(ni); 1479 break; 1480 case IEEE80211_NODE_MESH_ESTABLISHED: 1481 if (ni->ni_mllid != meshpeer->peer_llinkid) { 1482 args[0] = ni->ni_mllid; 1483 args[1] = ni->ni_mlpid; 1484 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1485 ieee80211_send_action(ni, 1486 IEEE80211_ACTION_CAT_MESHPEERING, 1487 IEEE80211_ACTION_MESHPEERING_CLOSE, 1488 args); 1489 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1490 mesh_peer_timeout_setup(ni); 1491 break; 1492 } 1493 args[0] = ni->ni_mlpid; 1494 args[1] = ni->ni_mllid; 1495 ieee80211_send_action(ni, 1496 IEEE80211_ACTION_CAT_MESHPEERING, 1497 IEEE80211_ACTION_MESHPEERING_CONFIRM, 1498 args); 1499 break; 1500 case IEEE80211_NODE_MESH_HOLDING: 1501 args[0] = ni->ni_mlpid; 1502 args[1] = meshpeer->peer_llinkid; 1503 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 1504 ieee80211_send_action(ni, 1505 IEEE80211_ACTION_CAT_MESHPEERING, 1506 IEEE80211_ACTION_MESHPEERING_CLOSE, 1507 args); 1508 break; 1509 } 1510 return 0; 1511} 1512 1513static int 1514mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni, 1515 const struct ieee80211_frame *wh, 1516 const uint8_t *frm, const uint8_t *efrm) 1517{ 1518 struct ieee80211vap *vap = ni->ni_vap; 1519 struct ieee80211_meshpeer_ie ie; 1520 const struct ieee80211_meshpeer_ie *meshpeer; 1521 uint16_t args[3]; 1522 1523 /* +2+2+2+2 for action + code + capabilites + status code + AID */ 1524 meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie); 1525 if (meshpeer == NULL) { 1526 return 0; 1527 } 1528 1529 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1530 "recv PEER CONFIRM, local id 0x%x, peer id 0x%x", 1531 meshpeer->peer_llinkid, meshpeer->peer_linkid); 1532 1533 switch (ni->ni_mlstate) { 1534 case IEEE80211_NODE_MESH_OPENRCV: 1535 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED); 1536 mesh_peer_timeout_stop(ni); 1537 break; 1538 case IEEE80211_NODE_MESH_OPENSNT: 1539 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV); 1540 break; 1541 case IEEE80211_NODE_MESH_HOLDING: 1542 args[0] = ni->ni_mlpid; 1543 args[1] = meshpeer->peer_llinkid; 1544 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 1545 ieee80211_send_action(ni, 1546 IEEE80211_ACTION_CAT_MESHPEERING, 1547 IEEE80211_ACTION_MESHPEERING_CLOSE, 1548 args); 1549 break; 1550 case IEEE80211_NODE_MESH_CONFIRMRCV: 1551 if (ni->ni_mllid != meshpeer->peer_llinkid) { 1552 args[0] = ni->ni_mlpid; 1553 args[1] = ni->ni_mllid; 1554 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED; 1555 ieee80211_send_action(ni, 1556 IEEE80211_ACTION_CAT_MESHPEERING, 1557 IEEE80211_ACTION_MESHPEERING_CLOSE, 1558 args); 1559 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1560 mesh_peer_timeout_setup(ni); 1561 } 1562 break; 1563 default: 1564 IEEE80211_DISCARD(vap, 1565 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1566 wh, NULL, "received confirm in invalid state %d", 1567 ni->ni_mlstate); 1568 vap->iv_stats.is_rx_mgtdiscard++; 1569 break; 1570 } 1571 return 0; 1572} 1573 1574static int 1575mesh_recv_action_meshpeering_close(struct ieee80211_node *ni, 1576 const struct ieee80211_frame *wh, 1577 const uint8_t *frm, const uint8_t *efrm) 1578{ 1579 uint16_t args[3]; 1580 1581 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, 1582 ni, "%s", "recv PEER CLOSE"); 1583 1584 switch (ni->ni_mlstate) { 1585 case IEEE80211_NODE_MESH_IDLE: 1586 /* ignore */ 1587 break; 1588 case IEEE80211_NODE_MESH_OPENRCV: 1589 case IEEE80211_NODE_MESH_OPENSNT: 1590 case IEEE80211_NODE_MESH_CONFIRMRCV: 1591 case IEEE80211_NODE_MESH_ESTABLISHED: 1592 args[0] = ni->ni_mlpid; 1593 args[1] = ni->ni_mllid; 1594 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD; 1595 ieee80211_send_action(ni, 1596 IEEE80211_ACTION_CAT_MESHPEERING, 1597 IEEE80211_ACTION_MESHPEERING_CLOSE, 1598 args); 1599 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 1600 mesh_peer_timeout_setup(ni); 1601 break; 1602 case IEEE80211_NODE_MESH_HOLDING: 1603 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 1604 mesh_peer_timeout_setup(ni); 1605 break; 1606 } 1607 return 0; 1608} 1609 1610/* 1611 * Link Metric handling. 1612 */ 1613static int 1614mesh_recv_action_meshlmetric_req(struct ieee80211_node *ni, 1615 const struct ieee80211_frame *wh, 1616 const uint8_t *frm, const uint8_t *efrm) 1617{ 1618 uint32_t metric; 1619 1620 metric = mesh_airtime_calc(ni); 1621 ieee80211_send_action(ni, 1622 IEEE80211_ACTION_CAT_MESHLMETRIC, 1623 IEEE80211_ACTION_MESHLMETRIC_REP, 1624 &metric); 1625 return 0; 1626} 1627 1628static int 1629mesh_recv_action_meshlmetric_rep(struct ieee80211_node *ni, 1630 const struct ieee80211_frame *wh, 1631 const uint8_t *frm, const uint8_t *efrm) 1632{ 1633 return 0; 1634} 1635 1636static int 1637mesh_send_action(struct ieee80211_node *ni, struct mbuf *m) 1638{ 1639 struct ieee80211_bpf_params params; 1640 1641 memset(¶ms, 0, sizeof(params)); 1642 params.ibp_pri = WME_AC_VO; 1643 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 1644 /* XXX ucast/mcast */ 1645 params.ibp_try0 = ni->ni_txparms->maxretry; 1646 params.ibp_power = ni->ni_txpower; 1647 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION, 1648 ¶ms); 1649} 1650 1651#define ADDSHORT(frm, v) do { \ 1652 frm[0] = (v) & 0xff; \ 1653 frm[1] = (v) >> 8; \ 1654 frm += 2; \ 1655} while (0) 1656#define ADDWORD(frm, v) do { \ 1657 frm[0] = (v) & 0xff; \ 1658 frm[1] = ((v) >> 8) & 0xff; \ 1659 frm[2] = ((v) >> 16) & 0xff; \ 1660 frm[3] = ((v) >> 24) & 0xff; \ 1661 frm += 4; \ 1662} while (0) 1663 1664static int 1665mesh_send_action_meshpeering_open(struct ieee80211_node *ni, 1666 int category, int action, void *args0) 1667{ 1668 struct ieee80211vap *vap = ni->ni_vap; 1669 struct ieee80211com *ic = ni->ni_ic; 1670 uint16_t *args = args0; 1671 const struct ieee80211_rateset *rs; 1672 struct mbuf *m; 1673 uint8_t *frm; 1674 1675 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1676 "send PEER OPEN action: localid 0x%x", args[0]); 1677 1678 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1679 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 1680 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 1681 ieee80211_ref_node(ni); 1682 1683 m = ieee80211_getmgtframe(&frm, 1684 ic->ic_headroom + sizeof(struct ieee80211_frame), 1685 sizeof(uint16_t) /* action+category */ 1686 + sizeof(uint16_t) /* capabilites */ 1687 + sizeof(struct ieee80211_meshpeerver_ie) 1688 + 2 + IEEE80211_RATE_SIZE 1689 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1690 + 2 + IEEE80211_MESHID_LEN 1691 + sizeof(struct ieee80211_meshconf_ie) 1692 + sizeof(struct ieee80211_meshpeer_ie) 1693 ); 1694 if (m != NULL) { 1695 /* 1696 * mesh peer open action frame format: 1697 * [1] category 1698 * [1] action 1699 * [2] capabilities 1700 * [tlv] mesh peer protocol version 1701 * [tlv] rates 1702 * [tlv] xrates 1703 * [tlv] mesh id 1704 * [tlv] mesh conf 1705 * [tlv] mesh peer link mgmt 1706 */ 1707 *frm++ = category; 1708 *frm++ = action; 1709 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 1710 frm = ieee80211_add_meshpeerver(frm, vap); 1711 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 1712 frm = ieee80211_add_rates(frm, rs); 1713 frm = ieee80211_add_xrates(frm, rs); 1714 frm = ieee80211_add_meshid(frm, vap); 1715 frm = ieee80211_add_meshconf(frm, vap); 1716 frm = ieee80211_add_meshpeer(frm, IEEE80211_MESH_PEER_LINK_OPEN, 1717 args[0], 0, 0); 1718 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1719 return mesh_send_action(ni, m); 1720 } else { 1721 vap->iv_stats.is_tx_nobuf++; 1722 ieee80211_free_node(ni); 1723 return ENOMEM; 1724 } 1725} 1726 1727static int 1728mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni, 1729 int category, int action, void *args0) 1730{ 1731 struct ieee80211vap *vap = ni->ni_vap; 1732 struct ieee80211com *ic = ni->ni_ic; 1733 uint16_t *args = args0; 1734 const struct ieee80211_rateset *rs; 1735 struct mbuf *m; 1736 uint8_t *frm; 1737 1738 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1739 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x", 1740 args[0], args[1]); 1741 1742 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1743 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 1744 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 1745 ieee80211_ref_node(ni); 1746 1747 m = ieee80211_getmgtframe(&frm, 1748 ic->ic_headroom + sizeof(struct ieee80211_frame), 1749 sizeof(uint16_t) /* action+category */ 1750 + sizeof(uint16_t) /* capabilites */ 1751 + sizeof(uint16_t) /* status code */ 1752 + sizeof(uint16_t) /* AID */ 1753 + sizeof(struct ieee80211_meshpeerver_ie) 1754 + 2 + IEEE80211_RATE_SIZE 1755 + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE) 1756 + 2 + IEEE80211_MESHID_LEN 1757 + sizeof(struct ieee80211_meshconf_ie) 1758 + sizeof(struct ieee80211_meshpeer_ie) 1759 ); 1760 if (m != NULL) { 1761 /* 1762 * mesh peer confirm action frame format: 1763 * [1] category 1764 * [1] action 1765 * [2] capabilities 1766 * [2] status code 1767 * [2] association id (peer ID) 1768 * [tlv] mesh peer protocol version 1769 * [tlv] rates 1770 * [tlv] xrates 1771 * [tlv] mesh id 1772 * [tlv] mesh conf 1773 * [tlv] mesh peer link mgmt 1774 */ 1775 *frm++ = category; 1776 *frm++ = action; 1777 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan)); 1778 ADDSHORT(frm, 0); /* status code */ 1779 ADDSHORT(frm, args[1]); /* AID */ 1780 frm = ieee80211_add_meshpeerver(frm, vap); 1781 rs = ieee80211_get_suprates(ic, ic->ic_curchan); 1782 frm = ieee80211_add_rates(frm, rs); 1783 frm = ieee80211_add_xrates(frm, rs); 1784 frm = ieee80211_add_meshid(frm, vap); 1785 frm = ieee80211_add_meshconf(frm, vap); 1786 frm = ieee80211_add_meshpeer(frm, 1787 IEEE80211_MESH_PEER_LINK_CONFIRM, 1788 args[0], args[1], 0); 1789 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1790 return mesh_send_action(ni, m); 1791 } else { 1792 vap->iv_stats.is_tx_nobuf++; 1793 ieee80211_free_node(ni); 1794 return ENOMEM; 1795 } 1796} 1797 1798static int 1799mesh_send_action_meshpeering_close(struct ieee80211_node *ni, 1800 int category, int action, void *args0) 1801{ 1802 struct ieee80211vap *vap = ni->ni_vap; 1803 struct ieee80211com *ic = ni->ni_ic; 1804 uint16_t *args = args0; 1805 struct mbuf *m; 1806 uint8_t *frm; 1807 1808 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1809 "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d", 1810 args[0], args[1], args[2]); 1811 1812 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1813 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 1814 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 1815 ieee80211_ref_node(ni); 1816 1817 m = ieee80211_getmgtframe(&frm, 1818 ic->ic_headroom + sizeof(struct ieee80211_frame), 1819 sizeof(uint16_t) /* action+category */ 1820 + sizeof(uint16_t) /* reason code */ 1821 + sizeof(struct ieee80211_meshpeerver_ie) 1822 + 2 + IEEE80211_MESHID_LEN 1823 + sizeof(struct ieee80211_meshpeer_ie) 1824 ); 1825 if (m != NULL) { 1826 /* 1827 * mesh peer close action frame format: 1828 * [1] category 1829 * [1] action 1830 * [2] reason code 1831 * [tlv] mesh peer protocol version 1832 * [tlv] mesh id 1833 * [tlv] mesh peer link mgmt 1834 */ 1835 *frm++ = category; 1836 *frm++ = action; 1837 ADDSHORT(frm, args[2]); /* reason code */ 1838 frm = ieee80211_add_meshpeerver(frm, vap); 1839 frm = ieee80211_add_meshid(frm, vap); 1840 frm = ieee80211_add_meshpeer(frm, 1841 IEEE80211_MESH_PEER_LINK_CLOSE, 1842 args[0], args[1], args[2]); 1843 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1844 return mesh_send_action(ni, m); 1845 } else { 1846 vap->iv_stats.is_tx_nobuf++; 1847 ieee80211_free_node(ni); 1848 return ENOMEM; 1849 } 1850} 1851 1852static int 1853mesh_send_action_meshlink_request(struct ieee80211_node *ni, 1854 int category, int action, void *arg0) 1855{ 1856 struct ieee80211vap *vap = ni->ni_vap; 1857 struct ieee80211com *ic = ni->ni_ic; 1858 struct mbuf *m; 1859 uint8_t *frm; 1860 1861 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1862 "%s", "send LINK METRIC REQUEST action"); 1863 1864 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1865 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 1866 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 1867 ieee80211_ref_node(ni); 1868 1869 m = ieee80211_getmgtframe(&frm, 1870 ic->ic_headroom + sizeof(struct ieee80211_frame), 1871 sizeof(uint16_t) /* action+category */ 1872 ); 1873 if (m != NULL) { 1874 /* 1875 * mesh link metric request 1876 * [1] category 1877 * [1] action 1878 */ 1879 *frm++ = category; 1880 *frm++ = action; 1881 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1882 return mesh_send_action(ni, m); 1883 } else { 1884 vap->iv_stats.is_tx_nobuf++; 1885 ieee80211_free_node(ni); 1886 return ENOMEM; 1887 } 1888} 1889 1890static int 1891mesh_send_action_meshlink_reply(struct ieee80211_node *ni, 1892 int category, int action, void *args0) 1893{ 1894 struct ieee80211vap *vap = ni->ni_vap; 1895 struct ieee80211com *ic = ni->ni_ic; 1896 uint32_t *metric = args0; 1897 struct mbuf *m; 1898 uint8_t *frm; 1899 1900 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni, 1901 "send LINK METRIC REPLY action: metric 0x%x", *metric); 1902 1903 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1904 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 1905 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 1906 ieee80211_ref_node(ni); 1907 1908 m = ieee80211_getmgtframe(&frm, 1909 ic->ic_headroom + sizeof(struct ieee80211_frame), 1910 sizeof(uint16_t) /* action+category */ 1911 + sizeof(struct ieee80211_meshlmetric_ie) 1912 ); 1913 if (m != NULL) { 1914 /* 1915 * mesh link metric reply 1916 * [1] category 1917 * [1] action 1918 * [tlv] mesh link metric 1919 */ 1920 *frm++ = category; 1921 *frm++ = action; 1922 frm = ieee80211_add_meshlmetric(frm, *metric); 1923 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1924 return mesh_send_action(ni, m); 1925 } else { 1926 vap->iv_stats.is_tx_nobuf++; 1927 ieee80211_free_node(ni); 1928 return ENOMEM; 1929 } 1930} 1931 1932static void 1933mesh_peer_timeout_setup(struct ieee80211_node *ni) 1934{ 1935 switch (ni->ni_mlstate) { 1936 case IEEE80211_NODE_MESH_HOLDING: 1937 ni->ni_mltval = ieee80211_mesh_holdingtimeout; 1938 break; 1939 case IEEE80211_NODE_MESH_CONFIRMRCV: 1940 ni->ni_mltval = ieee80211_mesh_confirmtimeout; 1941 break; 1942 case IEEE80211_NODE_MESH_IDLE: 1943 ni->ni_mltval = 0; 1944 break; 1945 default: 1946 ni->ni_mltval = ieee80211_mesh_retrytimeout; 1947 break; 1948 } 1949 if (ni->ni_mltval) 1950 callout_reset(&ni->ni_mltimer, ni->ni_mltval, 1951 mesh_peer_timeout_cb, ni); 1952} 1953 1954/* 1955 * Same as above but backoffs timer statisically 50%. 1956 */ 1957static void 1958mesh_peer_timeout_backoff(struct ieee80211_node *ni) 1959{ 1960 uint32_t r; 1961 1962 r = arc4random(); 1963 ni->ni_mltval += r % ni->ni_mltval; 1964 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb, 1965 ni); 1966} 1967 1968static __inline void 1969mesh_peer_timeout_stop(struct ieee80211_node *ni) 1970{ 1971 callout_stop(&ni->ni_mltimer); 1972} 1973 1974/* 1975 * Mesh Peer Link Management FSM timeout handling. 1976 */ 1977static void 1978mesh_peer_timeout_cb(void *arg) 1979{ 1980 struct ieee80211_node *ni = (struct ieee80211_node *)arg; 1981 uint16_t args[3]; 1982 1983 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH, 1984 ni, "mesh link timeout, state %d, retry counter %d", 1985 ni->ni_mlstate, ni->ni_mlrcnt); 1986 1987 switch (ni->ni_mlstate) { 1988 case IEEE80211_NODE_MESH_IDLE: 1989 case IEEE80211_NODE_MESH_ESTABLISHED: 1990 break; 1991 case IEEE80211_NODE_MESH_OPENSNT: 1992 case IEEE80211_NODE_MESH_OPENRCV: 1993 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 1994 args[0] = ni->ni_mlpid; 1995 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES; 1996 ieee80211_send_action(ni, 1997 IEEE80211_ACTION_CAT_MESHPEERING, 1998 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 1999 ni->ni_mlrcnt = 0; 2000 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2001 mesh_peer_timeout_setup(ni); 2002 } else { 2003 args[0] = ni->ni_mlpid; 2004 ieee80211_send_action(ni, 2005 IEEE80211_ACTION_CAT_MESHPEERING, 2006 IEEE80211_ACTION_MESHPEERING_OPEN, args); 2007 ni->ni_mlrcnt++; 2008 mesh_peer_timeout_backoff(ni); 2009 } 2010 break; 2011 case IEEE80211_NODE_MESH_CONFIRMRCV: 2012 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) { 2013 args[0] = ni->ni_mlpid; 2014 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT; 2015 ieee80211_send_action(ni, 2016 IEEE80211_ACTION_CAT_MESHPEERING, 2017 IEEE80211_ACTION_MESHPEERING_CLOSE, args); 2018 ni->ni_mlrcnt = 0; 2019 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING); 2020 mesh_peer_timeout_setup(ni); 2021 } else { 2022 ni->ni_mlrcnt++; 2023 mesh_peer_timeout_setup(ni); 2024 } 2025 break; 2026 case IEEE80211_NODE_MESH_HOLDING: 2027 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE); 2028 break; 2029 } 2030} 2031 2032static __inline int 2033mesh_verify_meshpeerver(struct ieee80211vap *vap, const uint8_t *ie) 2034{ 2035 static const uint8_t peer[4] = IEEE80211_MESHPEERVER_PEER; 2036 const struct ieee80211_meshpeerver_ie *meshpeerver = 2037 (const struct ieee80211_meshpeerver_ie *) ie; 2038 2039 if (meshpeerver->peerver_len != 2040 sizeof(struct ieee80211_meshpeerver_ie) - 2) 2041 return 1; 2042 return memcmp(meshpeerver->peerver_proto, peer, 4); 2043} 2044 2045static __inline int 2046mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie) 2047{ 2048 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2049 2050 if (ie == NULL || ie[1] != ms->ms_idlen) 2051 return 1; 2052 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen); 2053} 2054 2055/* 2056 * Check if we are using the same algorithms for this mesh. 2057 */ 2058static int 2059mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie) 2060{ 2061 static const uint8_t null[4] = IEEE80211_MESHCONF_NULL; 2062 const struct ieee80211_meshconf_ie *meshconf = 2063 (const struct ieee80211_meshconf_ie *) ie; 2064 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 2065 2066 if (meshconf == NULL) 2067 return 1; 2068 if (meshconf->conf_ver != IEEE80211_MESHCONF_VERSION) { 2069 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2070 "wrong mesh conf version: %d\n", meshconf->conf_ver); 2071 return 1; 2072 } 2073 if (memcmp(meshconf->conf_pselid, ms->ms_ppath->mpp_ie, 4) != 0) { 2074 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2075 "unknown path selection algorithm: 0x%x%x%x%x\n", 2076 meshconf->conf_pselid[0], meshconf->conf_pselid[1], 2077 meshconf->conf_pselid[2], meshconf->conf_pselid[3]); 2078 return 1; 2079 } 2080 if (memcmp(meshconf->conf_pmetid, ms->ms_pmetric->mpm_ie, 4) != 0) { 2081 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2082 "unknown path metric algorithm: 0x%x%x%x%x\n", 2083 meshconf->conf_pmetid[0], meshconf->conf_pmetid[1], 2084 meshconf->conf_pmetid[2], meshconf->conf_pmetid[3]); 2085 return 1; 2086 } 2087 if (memcmp(meshconf->conf_ccid, null, 4) != 0) { 2088 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2089 "unknown congestion sig algorithm: 0x%x%x%x%x\n", 2090 meshconf->conf_ccid[0], meshconf->conf_ccid[1], 2091 meshconf->conf_ccid[2], meshconf->conf_ccid[3]); 2092 return 1; 2093 } 2094 if (memcmp(meshconf->conf_syncid, null, 4) != 0) { 2095 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2096 "unknown sync algorithm: 0x%x%x%x%x\n", 2097 meshconf->conf_syncid[0], meshconf->conf_syncid[1], 2098 meshconf->conf_syncid[2], meshconf->conf_syncid[3]); 2099 return 1; 2100 } 2101 if (memcmp(meshconf->conf_authid, null, 4) != 0) { 2102 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2103 "unknown auth auth algorithm: 0x%x%x%x%x\n", 2104 meshconf->conf_pselid[0], meshconf->conf_pselid[1], 2105 meshconf->conf_pselid[2], meshconf->conf_pselid[3]); 2106 return 1; 2107 } 2108 /* Not accepting peers */ 2109 if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) { 2110 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH, 2111 "not accepting peers: 0x%x\n", meshconf->conf_cap); 2112 return 1; 2113 } 2114 return 0; 2115} 2116 2117static int 2118mesh_verify_meshpeer(struct ieee80211vap *vap, const uint8_t *ie) 2119{ 2120 const struct ieee80211_meshpeer_ie *meshpeer = 2121 (const struct ieee80211_meshpeer_ie *) ie; 2122 2123 if (meshpeer == NULL) 2124 return 1; 2125 switch (meshpeer->peer_subtype) { 2126 case IEEE80211_MESH_PEER_LINK_OPEN: 2127 if (meshpeer->peer_len != 3) 2128 return 1; 2129 break; 2130 case IEEE80211_MESH_PEER_LINK_CONFIRM: 2131 if (meshpeer->peer_len != 5) 2132 return 1; 2133 break; 2134 case IEEE80211_MESH_PEER_LINK_CLOSE: 2135 if (meshpeer->peer_len < 5) 2136 return 1; 2137 if (meshpeer->peer_len == 5 && meshpeer->peer_linkid != 0) 2138 return 1; 2139 if (meshpeer->peer_rcode == 0) 2140 return 1; 2141 break; 2142 } 2143 return 0; 2144} 2145 2146/* 2147 * Add a Mesh ID IE to a frame. 2148 */ 2149uint8_t * 2150ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap) 2151{ 2152 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2153 2154 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap")); 2155 2156 *frm++ = IEEE80211_ELEMID_MESHID; 2157 *frm++ = ms->ms_idlen; 2158 memcpy(frm, ms->ms_id, ms->ms_idlen); 2159 return frm + ms->ms_idlen; 2160} 2161 2162/* 2163 * Add a Mesh Configuration IE to a frame. 2164 * For now just use HWMP routing, Airtime link metric, Null Congestion 2165 * Signaling, Null Sync Protocol and Null Authentication. 2166 */ 2167uint8_t * 2168ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap) 2169{ 2170 const struct ieee80211_mesh_state *ms = vap->iv_mesh; 2171 static const uint8_t null[4] = IEEE80211_MESHCONF_NULL; 2172 2173 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 2174 2175 *frm++ = IEEE80211_ELEMID_MESHCONF; 2176 *frm++ = sizeof(struct ieee80211_meshconf_ie) - 2; 2177 *frm++ = IEEE80211_MESHCONF_VERSION; 2178 memcpy(frm, ms->ms_ppath->mpp_ie, 4); /* path selection */ 2179 frm += 4; 2180 memcpy(frm, ms->ms_pmetric->mpm_ie, 4); /* link metric */ 2181 frm += 4; 2182 /* XXX null for now */ 2183 memcpy(frm, null, 4); /* congestion control */ 2184 frm += 4; 2185 memcpy(frm, null, 4); /* sync */ 2186 frm += 4; 2187 memcpy(frm, null, 4); /* auth */ 2188 frm += 4; 2189 /* NB: set the number of neighbors before the rest */ 2190 *frm = (ms->ms_neighbors > 15 ? 15 : ms->ms_neighbors) << 1; 2191 if (ms->ms_flags & IEEE80211_MESHFLAGS_PORTAL) 2192 *frm |= IEEE80211_MESHCONF_FORM_MP; 2193 frm += 1; 2194 if (ms->ms_flags & IEEE80211_MESHFLAGS_AP) 2195 *frm |= IEEE80211_MESHCONF_CAP_AP; 2196 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) 2197 *frm |= IEEE80211_MESHCONF_CAP_FWRD; 2198 frm += 1; 2199 return frm; 2200} 2201 2202/* 2203 * Add a Mesh Peer Protocol IE to a frame. 2204 * XXX: needs to grow support for Abbreviated Handshake 2205 */ 2206uint8_t * 2207ieee80211_add_meshpeerver(uint8_t *frm, struct ieee80211vap *vap) 2208{ 2209 static struct ieee80211_meshpeerver_ie ie = { 2210 .peerver_ie = IEEE80211_ELEMID_MESHPEERVER, 2211 .peerver_len = 4, 2212 .peerver_proto = IEEE80211_MESHPEERVER_PEER, 2213 }; 2214 2215 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap")); 2216 2217 memcpy(frm, &ie, sizeof(ie)); 2218 return frm + sizeof(ie); 2219} 2220 2221/* 2222 * Add a Mesh Peer Management IE to a frame. 2223 */ 2224uint8_t * 2225ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid, 2226 uint16_t peerid, uint16_t reason) 2227{ 2228 KASSERT(localid != 0, ("localid == 0")); 2229 2230 *frm++ = IEEE80211_ELEMID_MESHPEER; 2231 switch (subtype) { 2232 case IEEE80211_MESH_PEER_LINK_OPEN: 2233 *frm++ = 3; /* length */ 2234 *frm++ = subtype; 2235 ADDSHORT(frm, localid); /* local ID */ 2236 break; 2237 case IEEE80211_MESH_PEER_LINK_CONFIRM: 2238 KASSERT(peerid != 0, ("sending peer confirm without peer id")); 2239 *frm++ = 5; /* length */ 2240 *frm++ = subtype; 2241 ADDSHORT(frm, localid); /* local ID */ 2242 ADDSHORT(frm, peerid); /* peer ID */ 2243 break; 2244 case IEEE80211_MESH_PEER_LINK_CLOSE: 2245 if (peerid) 2246 *frm++ = 7; /* length */ 2247 else 2248 *frm++ = 5; /* length */ 2249 *frm++ = subtype; 2250 ADDSHORT(frm, localid); /* local ID */ 2251 if (peerid) 2252 ADDSHORT(frm, peerid); /* peer ID */ 2253 ADDSHORT(frm, reason); 2254 break; 2255 } 2256 return frm; 2257} 2258 2259/* 2260 * Compute an Airtime Link Metric for the link with this node. 2261 * 2262 * Based on Draft 3.0 spec (11B.10, p.149). 2263 */ 2264/* 2265 * Max 802.11s overhead. 2266 */ 2267#define IEEE80211_MESH_MAXOVERHEAD \ 2268 (sizeof(struct ieee80211_qosframe_addr4) \ 2269 + sizeof(struct ieee80211_meshcntl_ae11) \ 2270 + sizeof(struct llc) \ 2271 + IEEE80211_ADDR_LEN \ 2272 + IEEE80211_WEP_IVLEN \ 2273 + IEEE80211_WEP_KIDLEN \ 2274 + IEEE80211_WEP_CRCLEN \ 2275 + IEEE80211_WEP_MICLEN \ 2276 + IEEE80211_CRC_LEN) 2277uint32_t 2278mesh_airtime_calc(struct ieee80211_node *ni) 2279{ 2280#define M_BITS 8 2281#define S_FACTOR (2 * M_BITS) 2282 struct ieee80211com *ic = ni->ni_ic; 2283 struct ifnet *ifp = ni->ni_vap->iv_ifp; 2284 const static int nbits = 8192 << M_BITS; 2285 uint32_t overhead, rate, errrate; 2286 uint64_t res; 2287 2288 /* Time to transmit a frame */ 2289 rate = ni->ni_txrate; 2290 overhead = ieee80211_compute_duration(ic->ic_rt, 2291 ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS; 2292 /* Error rate in percentage */ 2293 /* XXX assuming small failures are ok */ 2294 errrate = (((ifp->if_oerrors + 2295 ifp->if_ierrors) / 100) << M_BITS) / 100; 2296 res = (overhead + (nbits / rate)) * 2297 ((1 << S_FACTOR) / ((1 << M_BITS) - errrate)); 2298 2299 return (uint32_t)(res >> S_FACTOR); 2300#undef M_BITS 2301#undef S_FACTOR 2302} 2303 2304/* 2305 * Add a Mesh Link Metric report IE to a frame. 2306 */ 2307uint8_t * 2308ieee80211_add_meshlmetric(uint8_t *frm, uint32_t metric) 2309{ 2310 *frm++ = IEEE80211_ELEMID_MESHLINK; 2311 *frm++ = 4; 2312 ADDWORD(frm, metric); 2313 return frm; 2314} 2315#undef ADDSHORT 2316#undef ADDWORD 2317 2318/* 2319 * Initialize any mesh-specific node state. 2320 */ 2321void 2322ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni) 2323{ 2324 ni->ni_flags |= IEEE80211_NODE_QOS; 2325 callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE); 2326} 2327 2328/* 2329 * Cleanup any mesh-specific node state. 2330 */ 2331void 2332ieee80211_mesh_node_cleanup(struct ieee80211_node *ni) 2333{ 2334 struct ieee80211vap *vap = ni->ni_vap; 2335 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2336 2337 callout_drain(&ni->ni_mltimer); 2338 /* NB: short-circuit callbacks after mesh_vdetach */ 2339 if (vap->iv_mesh != NULL) 2340 ms->ms_ppath->mpp_peerdown(ni); 2341} 2342 2343void 2344ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie) 2345{ 2346 ni->ni_meshidlen = ie[1]; 2347 memcpy(ni->ni_meshid, ie + 2, ie[1]); 2348} 2349 2350/* 2351 * Setup mesh-specific node state on neighbor discovery. 2352 */ 2353void 2354ieee80211_mesh_init_neighbor(struct ieee80211_node *ni, 2355 const struct ieee80211_frame *wh, 2356 const struct ieee80211_scanparams *sp) 2357{ 2358 ieee80211_parse_meshid(ni, sp->meshid); 2359} 2360 2361static int 2362mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 2363{ 2364 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2365 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 2366 struct ieee80211_mesh_route *rt; 2367 struct ieee80211req_mesh_route *imr; 2368 size_t len, off; 2369 uint8_t *p; 2370 int error; 2371 2372 if (vap->iv_opmode != IEEE80211_M_MBSS) 2373 return ENOSYS; 2374 2375 error = 0; 2376 switch (ireq->i_type) { 2377 case IEEE80211_IOC_MESH_ID: 2378 ireq->i_len = ms->ms_idlen; 2379 memcpy(tmpmeshid, ms->ms_id, ireq->i_len); 2380 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len); 2381 break; 2382 case IEEE80211_IOC_MESH_AP: 2383 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0; 2384 break; 2385 case IEEE80211_IOC_MESH_FWRD: 2386 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0; 2387 break; 2388 case IEEE80211_IOC_MESH_TTL: 2389 ireq->i_val = ms->ms_ttl; 2390 break; 2391 case IEEE80211_IOC_MESH_RTCMD: 2392 switch (ireq->i_val) { 2393 case IEEE80211_MESH_RTCMD_LIST: 2394 len = 0; 2395 MESH_RT_LOCK(ms); 2396 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 2397 len += sizeof(*imr); 2398 } 2399 MESH_RT_UNLOCK(ms); 2400 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) { 2401 ireq->i_len = len; 2402 return ENOMEM; 2403 } 2404 ireq->i_len = len; 2405 p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO); 2406 if (p == NULL) 2407 return ENOMEM; 2408 off = 0; 2409 MESH_RT_LOCK(ms); 2410 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) { 2411 if (off >= len) 2412 break; 2413 imr = (struct ieee80211req_mesh_route *) 2414 (p + off); 2415 IEEE80211_ADDR_COPY(imr->imr_dest, 2416 rt->rt_dest); 2417 IEEE80211_ADDR_COPY(imr->imr_nexthop, 2418 rt->rt_nexthop); 2419 imr->imr_metric = rt->rt_metric; 2420 imr->imr_nhops = rt->rt_nhops; 2421 imr->imr_lifetime = rt->rt_lifetime; 2422 off += sizeof(*imr); 2423 } 2424 MESH_RT_UNLOCK(ms); 2425 error = copyout(p, (uint8_t *)ireq->i_data, 2426 ireq->i_len); 2427 free(p, M_TEMP); 2428 break; 2429 case IEEE80211_MESH_RTCMD_FLUSH: 2430 case IEEE80211_MESH_RTCMD_ADD: 2431 case IEEE80211_MESH_RTCMD_DELETE: 2432 return EINVAL; 2433 default: 2434 return ENOSYS; 2435 } 2436 break; 2437 case IEEE80211_IOC_MESH_PR_METRIC: 2438 len = strlen(ms->ms_pmetric->mpm_descr); 2439 if (ireq->i_len < len) 2440 return EINVAL; 2441 ireq->i_len = len; 2442 error = copyout(ms->ms_pmetric->mpm_descr, 2443 (uint8_t *)ireq->i_data, len); 2444 break; 2445 case IEEE80211_IOC_MESH_PR_PATH: 2446 len = strlen(ms->ms_ppath->mpp_descr); 2447 if (ireq->i_len < len) 2448 return EINVAL; 2449 ireq->i_len = len; 2450 error = copyout(ms->ms_ppath->mpp_descr, 2451 (uint8_t *)ireq->i_data, len); 2452 break; 2453 default: 2454 return ENOSYS; 2455 } 2456 2457 return error; 2458} 2459IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211); 2460 2461static int 2462mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 2463{ 2464 struct ieee80211_mesh_state *ms = vap->iv_mesh; 2465 uint8_t tmpmeshid[IEEE80211_NWID_LEN]; 2466 uint8_t tmpaddr[IEEE80211_ADDR_LEN]; 2467 char tmpproto[IEEE80211_MESH_PROTO_DSZ]; 2468 int error; 2469 2470 if (vap->iv_opmode != IEEE80211_M_MBSS) 2471 return ENOSYS; 2472 2473 error = 0; 2474 switch (ireq->i_type) { 2475 case IEEE80211_IOC_MESH_ID: 2476 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN) 2477 return EINVAL; 2478 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len); 2479 if (error) 2480 break; 2481 memset(ms->ms_id, 0, IEEE80211_NWID_LEN); 2482 ms->ms_idlen = ireq->i_len; 2483 memcpy(ms->ms_id, tmpmeshid, ireq->i_len); 2484 break; 2485 case IEEE80211_IOC_MESH_AP: 2486 if (ireq->i_val) 2487 ms->ms_flags |= IEEE80211_MESHFLAGS_AP; 2488 else 2489 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP; 2490 break; 2491 case IEEE80211_IOC_MESH_FWRD: 2492 if (ireq->i_val) 2493 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD; 2494 else 2495 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD; 2496 break; 2497 case IEEE80211_IOC_MESH_TTL: 2498 ms->ms_ttl = (uint8_t) ireq->i_val; 2499 break; 2500 case IEEE80211_IOC_MESH_RTCMD: 2501 switch (ireq->i_val) { 2502 case IEEE80211_MESH_RTCMD_LIST: 2503 return EINVAL; 2504 case IEEE80211_MESH_RTCMD_FLUSH: 2505 ieee80211_mesh_rt_flush(vap); 2506 break; 2507 case IEEE80211_MESH_RTCMD_ADD: 2508 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) || 2509 IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data)) 2510 return EINVAL; 2511 error = copyin(ireq->i_data, &tmpaddr, 2512 IEEE80211_ADDR_LEN); 2513 if (!error) 2514 ieee80211_mesh_discover(vap, tmpaddr, NULL); 2515 break; 2516 case IEEE80211_MESH_RTCMD_DELETE: 2517 ieee80211_mesh_rt_del(vap, ireq->i_data); 2518 break; 2519 default: 2520 return ENOSYS; 2521 } 2522 break; 2523 case IEEE80211_IOC_MESH_PR_METRIC: 2524 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 2525 if (!error) 2526 return mesh_select_proto_metric(vap, tmpproto); 2527 break; 2528 case IEEE80211_IOC_MESH_PR_PATH: 2529 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto)); 2530 if (!error) 2531 return mesh_select_proto_path(vap, tmpproto); 2532 break; 2533 default: 2534 return ENOSYS; 2535 } 2536 return error; 2537} 2538IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211); 2539