ieee80211_hwmp.c revision 234896
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_hwmp.c 234896 2012-05-01 16:18:38Z monthadar $"); 32#endif 33 34/* 35 * IEEE 802.11s Hybrid Wireless Mesh Protocol, HWMP. 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 <net/bpf.h> 61 62#include <net80211/ieee80211_var.h> 63#include <net80211/ieee80211_action.h> 64#include <net80211/ieee80211_input.h> 65#include <net80211/ieee80211_mesh.h> 66 67static void hwmp_vattach(struct ieee80211vap *); 68static void hwmp_vdetach(struct ieee80211vap *); 69static int hwmp_newstate(struct ieee80211vap *, 70 enum ieee80211_state, int); 71static int hwmp_send_action(struct ieee80211_node *, 72 const uint8_t [IEEE80211_ADDR_LEN], 73 const uint8_t [IEEE80211_ADDR_LEN], 74 uint8_t *, size_t); 75static uint8_t * hwmp_add_meshpreq(uint8_t *, 76 const struct ieee80211_meshpreq_ie *); 77static uint8_t * hwmp_add_meshprep(uint8_t *, 78 const struct ieee80211_meshprep_ie *); 79static uint8_t * hwmp_add_meshperr(uint8_t *, 80 const struct ieee80211_meshperr_ie *); 81static uint8_t * hwmp_add_meshrann(uint8_t *, 82 const struct ieee80211_meshrann_ie *); 83static void hwmp_rootmode_setup(struct ieee80211vap *); 84static void hwmp_rootmode_cb(void *); 85static void hwmp_rootmode_rann_cb(void *); 86static void hwmp_recv_preq(struct ieee80211vap *, struct ieee80211_node *, 87 const struct ieee80211_frame *, 88 const struct ieee80211_meshpreq_ie *); 89static int hwmp_send_preq(struct ieee80211_node *, 90 const uint8_t [IEEE80211_ADDR_LEN], 91 const uint8_t [IEEE80211_ADDR_LEN], 92 struct ieee80211_meshpreq_ie *, 93 struct timeval *, struct timeval *); 94static void hwmp_recv_prep(struct ieee80211vap *, struct ieee80211_node *, 95 const struct ieee80211_frame *, 96 const struct ieee80211_meshprep_ie *); 97static int hwmp_send_prep(struct ieee80211_node *, 98 const uint8_t [IEEE80211_ADDR_LEN], 99 const uint8_t [IEEE80211_ADDR_LEN], 100 struct ieee80211_meshprep_ie *); 101static void hwmp_recv_perr(struct ieee80211vap *, struct ieee80211_node *, 102 const struct ieee80211_frame *, 103 const struct ieee80211_meshperr_ie *); 104static int hwmp_send_perr(struct ieee80211_node *, 105 const uint8_t [IEEE80211_ADDR_LEN], 106 const uint8_t [IEEE80211_ADDR_LEN], 107 struct ieee80211_meshperr_ie *); 108static void hwmp_senderror(struct ieee80211vap *, 109 const uint8_t [IEEE80211_ADDR_LEN], 110 struct ieee80211_mesh_route *, int); 111static void hwmp_recv_rann(struct ieee80211vap *, struct ieee80211_node *, 112 const struct ieee80211_frame *, 113 const struct ieee80211_meshrann_ie *); 114static int hwmp_send_rann(struct ieee80211_node *, 115 const uint8_t [IEEE80211_ADDR_LEN], 116 const uint8_t [IEEE80211_ADDR_LEN], 117 struct ieee80211_meshrann_ie *); 118static struct ieee80211_node * 119 hwmp_discover(struct ieee80211vap *, 120 const uint8_t [IEEE80211_ADDR_LEN], struct mbuf *); 121static void hwmp_peerdown(struct ieee80211_node *); 122 123static struct timeval ieee80211_hwmp_preqminint = { 0, 100000 }; 124static struct timeval ieee80211_hwmp_perrminint = { 0, 100000 }; 125 126/* unalligned little endian access */ 127#define LE_WRITE_2(p, v) do { \ 128 ((uint8_t *)(p))[0] = (v) & 0xff; \ 129 ((uint8_t *)(p))[1] = ((v) >> 8) & 0xff; \ 130} while (0) 131#define LE_WRITE_4(p, v) do { \ 132 ((uint8_t *)(p))[0] = (v) & 0xff; \ 133 ((uint8_t *)(p))[1] = ((v) >> 8) & 0xff; \ 134 ((uint8_t *)(p))[2] = ((v) >> 16) & 0xff; \ 135 ((uint8_t *)(p))[3] = ((v) >> 24) & 0xff; \ 136} while (0) 137 138 139/* NB: the Target Address set in a Proactive PREQ is the broadcast address. */ 140static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 141 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 142 143typedef uint32_t ieee80211_hwmp_seq; 144#define HWMP_SEQ_LT(a, b) ((int32_t)((a)-(b)) < 0) 145#define HWMP_SEQ_LEQ(a, b) ((int32_t)((a)-(b)) <= 0) 146#define HWMP_SEQ_EQ(a, b) ((int32_t)((a)-(b)) == 0) 147#define HWMP_SEQ_GT(a, b) ((int32_t)((a)-(b)) > 0) 148#define HWMP_SEQ_GEQ(a, b) ((int32_t)((a)-(b)) >= 0) 149 150#define HWMP_SEQ_MAX(a, b) (a > b ? a : b) 151 152/* 153 * Private extension of ieee80211_mesh_route. 154 */ 155struct ieee80211_hwmp_route { 156 ieee80211_hwmp_seq hr_seq; /* last HWMP seq seen from dst*/ 157 ieee80211_hwmp_seq hr_preqid; /* last PREQ ID seen from dst */ 158 ieee80211_hwmp_seq hr_origseq; /* seq. no. on our latest PREQ*/ 159 struct timeval hr_lastpreq; /* last time we sent a PREQ */ 160 struct timeval hr_lastrootconf; /* last sent PREQ root conf */ 161 int hr_preqretries; /* number of discoveries */ 162 int hr_lastdiscovery; /* last discovery in ticks */ 163}; 164struct ieee80211_hwmp_state { 165 ieee80211_hwmp_seq hs_seq; /* next seq to be used */ 166 ieee80211_hwmp_seq hs_preqid; /* next PREQ ID to be used */ 167 int hs_rootmode; /* proactive HWMP */ 168 struct timeval hs_lastperr; /* last time we sent a PERR */ 169 struct callout hs_roottimer; 170 uint8_t hs_maxhops; /* max hop count */ 171}; 172 173static SYSCTL_NODE(_net_wlan, OID_AUTO, hwmp, CTLFLAG_RD, 0, 174 "IEEE 802.11s HWMP parameters"); 175static int ieee80211_hwmp_targetonly = 0; 176SYSCTL_INT(_net_wlan_hwmp, OID_AUTO, targetonly, CTLTYPE_INT | CTLFLAG_RW, 177 &ieee80211_hwmp_targetonly, 0, "Set TO bit on generated PREQs"); 178static int ieee80211_hwmp_pathtimeout = -1; 179SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, pathlifetime, CTLTYPE_INT | CTLFLAG_RW, 180 &ieee80211_hwmp_pathtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 181 "path entry lifetime (ms)"); 182static int ieee80211_hwmp_maxpreq_retries = -1; 183SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, maxpreq_retries, CTLTYPE_INT | CTLFLAG_RW, 184 &ieee80211_hwmp_maxpreq_retries, 0, ieee80211_sysctl_msecs_ticks, "I", 185 "maximum number of preq retries"); 186static int ieee80211_hwmp_net_diameter_traversaltime = -1; 187SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, net_diameter_traversal_time, 188 CTLTYPE_INT | CTLFLAG_RW, &ieee80211_hwmp_net_diameter_traversaltime, 0, 189 ieee80211_sysctl_msecs_ticks, "I", 190 "estimate travelse time across the MBSS (ms)"); 191static int ieee80211_hwmp_roottimeout = -1; 192SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, roottimeout, CTLTYPE_INT | CTLFLAG_RW, 193 &ieee80211_hwmp_roottimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 194 "root PREQ timeout (ms)"); 195static int ieee80211_hwmp_rootint = -1; 196SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, rootint, CTLTYPE_INT | CTLFLAG_RW, 197 &ieee80211_hwmp_rootint, 0, ieee80211_sysctl_msecs_ticks, "I", 198 "root interval (ms)"); 199static int ieee80211_hwmp_rannint = -1; 200SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, rannint, CTLTYPE_INT | CTLFLAG_RW, 201 &ieee80211_hwmp_rannint, 0, ieee80211_sysctl_msecs_ticks, "I", 202 "root announcement interval (ms)"); 203static struct timeval ieee80211_hwmp_rootconfint = { 0, 0 }; 204static int ieee80211_hwmp_rootconfint_internal = -1; 205SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, rootconfint, CTLTYPE_INT | CTLFLAG_RD, 206 &ieee80211_hwmp_rootconfint_internal, 0, ieee80211_sysctl_msecs_ticks, "I", 207 "root confirmation interval (ms) (read-only)"); 208 209#define IEEE80211_HWMP_DEFAULT_MAXHOPS 31 210 211static ieee80211_recv_action_func hwmp_recv_action_meshpath; 212 213static struct ieee80211_mesh_proto_path mesh_proto_hwmp = { 214 .mpp_descr = "HWMP", 215 .mpp_ie = IEEE80211_MESHCONF_PATH_HWMP, 216 .mpp_discover = hwmp_discover, 217 .mpp_peerdown = hwmp_peerdown, 218 .mpp_senderror = hwmp_senderror, 219 .mpp_vattach = hwmp_vattach, 220 .mpp_vdetach = hwmp_vdetach, 221 .mpp_newstate = hwmp_newstate, 222 .mpp_privlen = sizeof(struct ieee80211_hwmp_route), 223}; 224SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, inact, CTLTYPE_INT | CTLFLAG_RW, 225 &mesh_proto_hwmp.mpp_inact, 0, ieee80211_sysctl_msecs_ticks, "I", 226 "mesh route inactivity timeout (ms)"); 227 228 229static void 230ieee80211_hwmp_init(void) 231{ 232 /* Default values as per amendment */ 233 ieee80211_hwmp_pathtimeout = msecs_to_ticks(5*1000); 234 ieee80211_hwmp_roottimeout = msecs_to_ticks(5*1000); 235 ieee80211_hwmp_rootint = msecs_to_ticks(2*1000); 236 ieee80211_hwmp_rannint = msecs_to_ticks(1*1000); 237 ieee80211_hwmp_rootconfint_internal = msecs_to_ticks(2*1000); 238 ieee80211_hwmp_maxpreq_retries = 3; 239 /* 240 * (TU): A measurement of time equal to 1024 ��s, 241 * 500 TU is 512 ms. 242 */ 243 ieee80211_hwmp_net_diameter_traversaltime = msecs_to_ticks(512); 244 245 /* 246 * NB: I dont know how to make SYSCTL_PROC that calls ms to ticks 247 * and return a struct timeval... 248 */ 249 ieee80211_hwmp_rootconfint.tv_usec = 250 ieee80211_hwmp_rootconfint_internal * 1000; 251 252 /* 253 * Register action frame handler. 254 */ 255 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 256 IEEE80211_ACTION_MESH_HWMP, hwmp_recv_action_meshpath); 257 258 /* NB: default is 5 secs per spec */ 259 mesh_proto_hwmp.mpp_inact = msecs_to_ticks(5*1000); 260 261 /* 262 * Register HWMP. 263 */ 264 ieee80211_mesh_register_proto_path(&mesh_proto_hwmp); 265} 266SYSINIT(wlan_hwmp, SI_SUB_DRIVERS, SI_ORDER_SECOND, ieee80211_hwmp_init, NULL); 267 268void 269hwmp_vattach(struct ieee80211vap *vap) 270{ 271 struct ieee80211_hwmp_state *hs; 272 273 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, 274 ("not a mesh vap, opmode %d", vap->iv_opmode)); 275 276 hs = malloc(sizeof(struct ieee80211_hwmp_state), M_80211_VAP, 277 M_NOWAIT | M_ZERO); 278 if (hs == NULL) { 279 printf("%s: couldn't alloc HWMP state\n", __func__); 280 return; 281 } 282 hs->hs_maxhops = IEEE80211_HWMP_DEFAULT_MAXHOPS; 283 callout_init(&hs->hs_roottimer, CALLOUT_MPSAFE); 284 vap->iv_hwmp = hs; 285} 286 287void 288hwmp_vdetach(struct ieee80211vap *vap) 289{ 290 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 291 292 callout_drain(&hs->hs_roottimer); 293 free(vap->iv_hwmp, M_80211_VAP); 294 vap->iv_hwmp = NULL; 295} 296 297int 298hwmp_newstate(struct ieee80211vap *vap, enum ieee80211_state ostate, int arg) 299{ 300 enum ieee80211_state nstate = vap->iv_state; 301 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 302 303 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 304 __func__, ieee80211_state_name[ostate], 305 ieee80211_state_name[nstate], arg); 306 307 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) 308 callout_drain(&hs->hs_roottimer); 309 if (nstate == IEEE80211_S_RUN) 310 hwmp_rootmode_setup(vap); 311 return 0; 312} 313 314/* 315 * Verify the length of an HWMP PREQ and return the number 316 * of destinations >= 1, if verification fails -1 is returned. 317 */ 318static int 319verify_mesh_preq_len(struct ieee80211vap *vap, 320 const struct ieee80211_frame *wh, const uint8_t *iefrm) 321{ 322 int alloc_sz = -1; 323 int ndest = -1; 324 if (iefrm[2] & IEEE80211_MESHPREQ_FLAGS_AE) { 325 /* Originator External Address present */ 326 alloc_sz = IEEE80211_MESHPREQ_BASE_SZ_AE; 327 ndest = iefrm[IEEE80211_MESHPREQ_TCNT_OFFSET_AE]; 328 } else { 329 /* w/o Originator External Address */ 330 alloc_sz = IEEE80211_MESHPREQ_BASE_SZ; 331 ndest = iefrm[IEEE80211_MESHPREQ_TCNT_OFFSET]; 332 } 333 alloc_sz += ndest * IEEE80211_MESHPREQ_TRGT_SZ; 334 335 if(iefrm[1] != (alloc_sz)) { 336 IEEE80211_DISCARD(vap, 337 IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP, 338 wh, NULL, "PREQ (AE=%s) with wrong len", 339 iefrm[2] & IEEE80211_MESHPREQ_FLAGS_AE ? "1" : "0"); 340 return (-1); 341 } 342 return ndest; 343} 344 345/* 346 * Verify the length of an HWMP PREP and returns 1 on success, 347 * otherwise -1. 348 */ 349static int 350verify_mesh_prep_len(struct ieee80211vap *vap, 351 const struct ieee80211_frame *wh, const uint8_t *iefrm) 352{ 353 int alloc_sz = -1; 354 if (iefrm[2] & IEEE80211_MESHPREP_FLAGS_AE) { 355 if (iefrm[1] == IEEE80211_MESHPREP_BASE_SZ_AE) 356 alloc_sz = IEEE80211_MESHPREP_BASE_SZ_AE; 357 } else if (iefrm[1] == IEEE80211_MESHPREP_BASE_SZ) 358 alloc_sz = IEEE80211_MESHPREP_BASE_SZ; 359 if(alloc_sz < 0) { 360 IEEE80211_DISCARD(vap, 361 IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP, 362 wh, NULL, "PREP (AE=%s) with wrong len", 363 iefrm[2] & IEEE80211_MESHPREP_FLAGS_AE ? "1" : "0"); 364 return (-1); 365 } 366 return (1); 367} 368 369/* 370 * Verify the length of an HWMP PERR and return the number 371 * of destinations >= 1, if verification fails -1 is returned. 372 */ 373static int 374verify_mesh_perr_len(struct ieee80211vap *vap, 375 const struct ieee80211_frame *wh, const uint8_t *iefrm) 376{ 377 int alloc_sz = -1; 378 const uint8_t *iefrm_t = iefrm; 379 uint8_t ndest = iefrm_t[IEEE80211_MESHPERR_NDEST_OFFSET]; 380 int i; 381 382 if(ndest > IEEE80211_MESHPERR_MAXDEST) { 383 IEEE80211_DISCARD(vap, 384 IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP, 385 wh, NULL, "PERR with wrong number of destionat (>19), %u", 386 ndest); 387 return (-1); 388 } 389 390 iefrm_t += IEEE80211_MESHPERR_NDEST_OFFSET + 1; /* flag is next field */ 391 /* We need to check each destionation flag to know size */ 392 for(i = 0; i<ndest; i++) { 393 if ((*iefrm_t) & IEEE80211_MESHPERR_FLAGS_AE) 394 iefrm_t += IEEE80211_MESHPERR_DEST_SZ_AE; 395 else 396 iefrm_t += IEEE80211_MESHPERR_DEST_SZ; 397 } 398 399 alloc_sz = (iefrm_t - iefrm) - 2; /* action + code */ 400 if(alloc_sz != iefrm[1]) { 401 IEEE80211_DISCARD(vap, 402 IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP, 403 wh, NULL, "%s", "PERR with wrong len"); 404 return (-1); 405 } 406 return ndest; 407} 408 409static int 410hwmp_recv_action_meshpath(struct ieee80211_node *ni, 411 const struct ieee80211_frame *wh, 412 const uint8_t *frm, const uint8_t *efrm) 413{ 414 struct ieee80211vap *vap = ni->ni_vap; 415 struct ieee80211_meshpreq_ie *preq; 416 struct ieee80211_meshprep_ie *prep; 417 struct ieee80211_meshperr_ie *perr; 418 struct ieee80211_meshrann_ie rann; 419 const uint8_t *iefrm = frm + 2; /* action + code */ 420 const uint8_t *iefrm_t = iefrm; /* temporary pointer */ 421 int ndest = -1; 422 int found = 0; 423 424 while (efrm - iefrm > 1) { 425 IEEE80211_VERIFY_LENGTH(efrm - iefrm, iefrm[1] + 2, return 0); 426 switch (*iefrm) { 427 case IEEE80211_ELEMID_MESHPREQ: 428 { 429 int i = 0; 430 431 iefrm_t = iefrm; 432 ndest = verify_mesh_preq_len(vap, wh, iefrm_t); 433 if (ndest < 0) { 434 vap->iv_stats.is_rx_mgtdiscard++; 435 break; 436 } 437 preq = malloc(sizeof(*preq) + 438 (ndest - 1) * sizeof(*preq->preq_targets), 439 M_80211_MESH_PREQ, M_NOWAIT | M_ZERO); 440 KASSERT(preq != NULL, ("preq == NULL")); 441 442 preq->preq_ie = *iefrm_t++; 443 preq->preq_len = *iefrm_t++; 444 preq->preq_flags = *iefrm_t++; 445 preq->preq_hopcount = *iefrm_t++; 446 preq->preq_ttl = *iefrm_t++; 447 preq->preq_id = LE_READ_4(iefrm_t); iefrm_t += 4; 448 IEEE80211_ADDR_COPY(preq->preq_origaddr, iefrm_t); 449 iefrm_t += 6; 450 preq->preq_origseq = LE_READ_4(iefrm_t); iefrm_t += 4; 451 /* NB: may have Originator Proxied Address */ 452 if (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE) { 453 IEEE80211_ADDR_COPY( 454 preq->preq_orig_ext_addr, iefrm_t); 455 iefrm_t += 6; 456 } 457 preq->preq_lifetime = LE_READ_4(iefrm_t); iefrm_t += 4; 458 preq->preq_metric = LE_READ_4(iefrm_t); iefrm_t += 4; 459 preq->preq_tcount = *iefrm_t++; 460 461 for (i = 0; i < preq->preq_tcount; i++) { 462 preq->preq_targets[i].target_flags = *iefrm_t++; 463 IEEE80211_ADDR_COPY( 464 preq->preq_targets[i].target_addr, iefrm_t); 465 iefrm_t += 6; 466 preq->preq_targets[i].target_seq = 467 LE_READ_4(iefrm_t); 468 iefrm_t += 4; 469 } 470 471 hwmp_recv_preq(vap, ni, wh, preq); 472 free(preq, M_80211_MESH_PREQ); 473 found++; 474 break; 475 } 476 case IEEE80211_ELEMID_MESHPREP: 477 { 478 iefrm_t = iefrm; 479 ndest = verify_mesh_prep_len(vap, wh, iefrm_t); 480 if (ndest < 0) { 481 vap->iv_stats.is_rx_mgtdiscard++; 482 break; 483 } 484 prep = malloc(sizeof(*prep), 485 M_80211_MESH_PREP, M_NOWAIT | M_ZERO); 486 KASSERT(prep != NULL, ("prep == NULL")); 487 488 prep->prep_ie = *iefrm_t++; 489 prep->prep_len = *iefrm_t++; 490 prep->prep_flags = *iefrm_t++; 491 prep->prep_hopcount = *iefrm_t++; 492 prep->prep_ttl = *iefrm_t++; 493 IEEE80211_ADDR_COPY(prep->prep_targetaddr, iefrm_t); 494 iefrm_t += 6; 495 prep->prep_targetseq = LE_READ_4(iefrm_t); iefrm_t += 4; 496 /* NB: May have Target Proxied Address */ 497 if (prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE) { 498 IEEE80211_ADDR_COPY( 499 prep->prep_target_ext_addr, iefrm_t); 500 iefrm_t += 6; 501 } 502 prep->prep_lifetime = LE_READ_4(iefrm_t); iefrm_t += 4; 503 prep->prep_metric = LE_READ_4(iefrm_t); iefrm_t += 4; 504 IEEE80211_ADDR_COPY(prep->prep_origaddr, iefrm_t); 505 iefrm_t += 6; 506 prep->prep_origseq = LE_READ_4(iefrm_t); iefrm_t += 4; 507 508 hwmp_recv_prep(vap, ni, wh, prep); 509 free(prep, M_80211_MESH_PREP); 510 found++; 511 break; 512 } 513 case IEEE80211_ELEMID_MESHPERR: 514 { 515 int i = 0; 516 517 iefrm_t = iefrm; 518 ndest = verify_mesh_perr_len(vap, wh, iefrm_t); 519 if (ndest < 0) { 520 vap->iv_stats.is_rx_mgtdiscard++; 521 break; 522 } 523 perr = malloc(sizeof(*perr) + 524 (ndest - 1) * sizeof(*perr->perr_dests), 525 M_80211_MESH_PERR, M_NOWAIT | M_ZERO); 526 KASSERT(perr != NULL, ("perr == NULL")); 527 528 perr->perr_ie = *iefrm_t++; 529 perr->perr_len = *iefrm_t++; 530 perr->perr_ttl = *iefrm_t++; 531 perr->perr_ndests = *iefrm_t++; 532 533 for (i = 0; i<perr->perr_ndests; i++) { 534 perr->perr_dests[i].dest_flags = *iefrm_t++; 535 IEEE80211_ADDR_COPY( 536 perr->perr_dests[i].dest_addr, iefrm_t); 537 iefrm_t += 6; 538 perr->perr_dests[i].dest_seq = LE_READ_4(iefrm_t); 539 iefrm_t += 4; 540 /* NB: May have Target Proxied Address */ 541 if (perr->perr_dests[i].dest_flags & 542 IEEE80211_MESHPERR_FLAGS_AE) { 543 IEEE80211_ADDR_COPY( 544 perr->perr_dests[i].dest_ext_addr, 545 iefrm_t); 546 iefrm_t += 6; 547 } 548 perr->perr_dests[i].dest_rcode = 549 LE_READ_2(iefrm_t); 550 iefrm_t += 2; 551 } 552 553 hwmp_recv_perr(vap, ni, wh, perr); 554 free(perr, M_80211_MESH_PERR); 555 found++; 556 break; 557 } 558 case IEEE80211_ELEMID_MESHRANN: 559 { 560 const struct ieee80211_meshrann_ie *mrann = 561 (const struct ieee80211_meshrann_ie *) iefrm; 562 if (mrann->rann_len != 563 sizeof(struct ieee80211_meshrann_ie) - 2) { 564 IEEE80211_DISCARD(vap, 565 IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP, 566 wh, NULL, "%s", "RAN with wrong len"); 567 vap->iv_stats.is_rx_mgtdiscard++; 568 return 1; 569 } 570 memcpy(&rann, mrann, sizeof(rann)); 571 rann.rann_seq = LE_READ_4(&mrann->rann_seq); 572 rann.rann_interval = LE_READ_4(&mrann->rann_interval); 573 rann.rann_metric = LE_READ_4(&mrann->rann_metric); 574 hwmp_recv_rann(vap, ni, wh, &rann); 575 found++; 576 break; 577 } 578 } 579 iefrm += iefrm[1] + 2; 580 } 581 if (!found) { 582 IEEE80211_DISCARD(vap, 583 IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP, 584 wh, NULL, "%s", "PATH SEL action without IE"); 585 vap->iv_stats.is_rx_mgtdiscard++; 586 } 587 return 0; 588} 589 590static int 591hwmp_send_action(struct ieee80211_node *ni, 592 const uint8_t sa[IEEE80211_ADDR_LEN], 593 const uint8_t da[IEEE80211_ADDR_LEN], 594 uint8_t *ie, size_t len) 595{ 596 struct ieee80211vap *vap = ni->ni_vap; 597 struct ieee80211com *ic = ni->ni_ic; 598 struct ieee80211_bpf_params params; 599 struct mbuf *m; 600 uint8_t *frm; 601 602 if (vap->iv_state == IEEE80211_S_CAC) { 603 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 604 "block %s frame in CAC state", "HWMP action"); 605 vap->iv_stats.is_tx_badstate++; 606 return EIO; /* XXX */ 607 } 608 609 KASSERT(ni != NULL, ("null node")); 610 /* 611 * Hold a reference on the node so it doesn't go away until after 612 * the xmit is complete all the way in the driver. On error we 613 * will remove our reference. 614 */ 615#ifdef IEEE80211_DEBUG_REFCNT 616 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 617 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 618 __func__, __LINE__, 619 ni, ether_sprintf(ni->ni_macaddr), 620 ieee80211_node_refcnt(ni)+1); 621#endif 622 ieee80211_ref_node(ni); 623 624 m = ieee80211_getmgtframe(&frm, 625 ic->ic_headroom + sizeof(struct ieee80211_frame), 626 sizeof(struct ieee80211_action) + len 627 ); 628 if (m == NULL) { 629 ieee80211_free_node(ni); 630 vap->iv_stats.is_tx_nobuf++; 631 return ENOMEM; 632 } 633 *frm++ = IEEE80211_ACTION_CAT_MESH; 634 *frm++ = IEEE80211_ACTION_MESH_HWMP; 635 switch (*ie) { 636 case IEEE80211_ELEMID_MESHPREQ: 637 frm = hwmp_add_meshpreq(frm, 638 (struct ieee80211_meshpreq_ie *)ie); 639 break; 640 case IEEE80211_ELEMID_MESHPREP: 641 frm = hwmp_add_meshprep(frm, 642 (struct ieee80211_meshprep_ie *)ie); 643 break; 644 case IEEE80211_ELEMID_MESHPERR: 645 frm = hwmp_add_meshperr(frm, 646 (struct ieee80211_meshperr_ie *)ie); 647 break; 648 case IEEE80211_ELEMID_MESHRANN: 649 frm = hwmp_add_meshrann(frm, 650 (struct ieee80211_meshrann_ie *)ie); 651 break; 652 } 653 654 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 655 M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT); 656 if (m == NULL) { 657 ieee80211_free_node(ni); 658 vap->iv_stats.is_tx_nobuf++; 659 return ENOMEM; 660 } 661 ieee80211_send_setup(ni, m, 662 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 663 IEEE80211_NONQOS_TID, sa, da, sa); 664 665 m->m_flags |= M_ENCAP; /* mark encapsulated */ 666 IEEE80211_NODE_STAT(ni, tx_mgmt); 667 668 memset(¶ms, 0, sizeof(params)); 669 params.ibp_pri = WME_AC_VO; 670 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 671 if (IEEE80211_IS_MULTICAST(da)) 672 params.ibp_try0 = 1; 673 else 674 params.ibp_try0 = ni->ni_txparms->maxretry; 675 params.ibp_power = ni->ni_txpower; 676 return ic->ic_raw_xmit(ni, m, ¶ms); 677} 678 679#define ADDSHORT(frm, v) do { \ 680 frm[0] = (v) & 0xff; \ 681 frm[1] = (v) >> 8; \ 682 frm += 2; \ 683} while (0) 684#define ADDWORD(frm, v) do { \ 685 LE_WRITE_4(frm, v); \ 686 frm += 4; \ 687} while (0) 688/* 689 * Add a Mesh Path Request IE to a frame. 690 */ 691#define PREQ_TFLAGS(n) preq->preq_targets[n].target_flags 692#define PREQ_TADDR(n) preq->preq_targets[n].target_addr 693#define PREQ_TSEQ(n) preq->preq_targets[n].target_seq 694static uint8_t * 695hwmp_add_meshpreq(uint8_t *frm, const struct ieee80211_meshpreq_ie *preq) 696{ 697 int i; 698 699 *frm++ = IEEE80211_ELEMID_MESHPREQ; 700 *frm++ = preq->preq_len; /* len already calculated */ 701 *frm++ = preq->preq_flags; 702 *frm++ = preq->preq_hopcount; 703 *frm++ = preq->preq_ttl; 704 ADDWORD(frm, preq->preq_id); 705 IEEE80211_ADDR_COPY(frm, preq->preq_origaddr); frm += 6; 706 ADDWORD(frm, preq->preq_origseq); 707 if (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE) { 708 IEEE80211_ADDR_COPY(frm, preq->preq_orig_ext_addr); 709 frm += 6; 710 } 711 ADDWORD(frm, preq->preq_lifetime); 712 ADDWORD(frm, preq->preq_metric); 713 *frm++ = preq->preq_tcount; 714 for (i = 0; i < preq->preq_tcount; i++) { 715 *frm++ = PREQ_TFLAGS(i); 716 IEEE80211_ADDR_COPY(frm, PREQ_TADDR(i)); 717 frm += 6; 718 ADDWORD(frm, PREQ_TSEQ(i)); 719 } 720 return frm; 721} 722#undef PREQ_TFLAGS 723#undef PREQ_TADDR 724#undef PREQ_TSEQ 725 726/* 727 * Add a Mesh Path Reply IE to a frame. 728 */ 729static uint8_t * 730hwmp_add_meshprep(uint8_t *frm, const struct ieee80211_meshprep_ie *prep) 731{ 732 *frm++ = IEEE80211_ELEMID_MESHPREP; 733 *frm++ = prep->prep_len; /* len already calculated */ 734 *frm++ = prep->prep_flags; 735 *frm++ = prep->prep_hopcount; 736 *frm++ = prep->prep_ttl; 737 IEEE80211_ADDR_COPY(frm, prep->prep_targetaddr); frm += 6; 738 ADDWORD(frm, prep->prep_targetseq); 739 if (prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE) { 740 IEEE80211_ADDR_COPY(frm, prep->prep_target_ext_addr); 741 frm += 6; 742 } 743 ADDWORD(frm, prep->prep_lifetime); 744 ADDWORD(frm, prep->prep_metric); 745 IEEE80211_ADDR_COPY(frm, prep->prep_origaddr); frm += 6; 746 ADDWORD(frm, prep->prep_origseq); 747 return frm; 748} 749 750/* 751 * Add a Mesh Path Error IE to a frame. 752 */ 753#define PERR_DFLAGS(n) perr->perr_dests[n].dest_flags 754#define PERR_DADDR(n) perr->perr_dests[n].dest_addr 755#define PERR_DSEQ(n) perr->perr_dests[n].dest_seq 756#define PERR_EXTADDR(n) perr->perr_dests[n].dest_ext_addr 757#define PERR_DRCODE(n) perr->perr_dests[n].dest_rcode 758static uint8_t * 759hwmp_add_meshperr(uint8_t *frm, const struct ieee80211_meshperr_ie *perr) 760{ 761 int i; 762 763 *frm++ = IEEE80211_ELEMID_MESHPERR; 764 *frm++ = perr->perr_len; /* len already calculated */ 765 *frm++ = perr->perr_ttl; 766 *frm++ = perr->perr_ndests; 767 for (i = 0; i < perr->perr_ndests; i++) { 768 *frm++ = PERR_DFLAGS(i); 769 IEEE80211_ADDR_COPY(frm, PERR_DADDR(i)); 770 frm += 6; 771 ADDWORD(frm, PERR_DSEQ(i)); 772 if (PERR_DFLAGS(i) & IEEE80211_MESHPERR_FLAGS_AE) { 773 IEEE80211_ADDR_COPY(frm, PERR_EXTADDR(i)); 774 frm += 6; 775 } 776 ADDSHORT(frm, PERR_DRCODE(i)); 777 } 778 return frm; 779} 780#undef PERR_DFLAGS 781#undef PERR_DADDR 782#undef PERR_DSEQ 783#undef PERR_EXTADDR 784#undef PERR_DRCODE 785 786/* 787 * Add a Root Annoucement IE to a frame. 788 */ 789static uint8_t * 790hwmp_add_meshrann(uint8_t *frm, const struct ieee80211_meshrann_ie *rann) 791{ 792 *frm++ = IEEE80211_ELEMID_MESHRANN; 793 *frm++ = rann->rann_len; 794 *frm++ = rann->rann_flags; 795 *frm++ = rann->rann_hopcount; 796 *frm++ = rann->rann_ttl; 797 IEEE80211_ADDR_COPY(frm, rann->rann_addr); frm += 6; 798 ADDWORD(frm, rann->rann_seq); 799 ADDWORD(frm, rann->rann_interval); 800 ADDWORD(frm, rann->rann_metric); 801 return frm; 802} 803 804static void 805hwmp_rootmode_setup(struct ieee80211vap *vap) 806{ 807 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 808 809 switch (hs->hs_rootmode) { 810 case IEEE80211_HWMP_ROOTMODE_DISABLED: 811 callout_drain(&hs->hs_roottimer); 812 break; 813 case IEEE80211_HWMP_ROOTMODE_NORMAL: 814 case IEEE80211_HWMP_ROOTMODE_PROACTIVE: 815 callout_reset(&hs->hs_roottimer, ieee80211_hwmp_rootint, 816 hwmp_rootmode_cb, vap); 817 break; 818 case IEEE80211_HWMP_ROOTMODE_RANN: 819 callout_reset(&hs->hs_roottimer, ieee80211_hwmp_rannint, 820 hwmp_rootmode_rann_cb, vap); 821 break; 822 } 823} 824 825/* 826 * Send a broadcast Path Request to find all nodes on the mesh. We are 827 * called when the vap is configured as a HWMP root node. 828 */ 829#define PREQ_TFLAGS(n) preq.preq_targets[n].target_flags 830#define PREQ_TADDR(n) preq.preq_targets[n].target_addr 831#define PREQ_TSEQ(n) preq.preq_targets[n].target_seq 832static void 833hwmp_rootmode_cb(void *arg) 834{ 835 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 836 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 837 struct ieee80211_mesh_state *ms = vap->iv_mesh; 838 struct ieee80211_meshpreq_ie preq; 839 840 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, vap->iv_bss, 841 "%s", "send broadcast PREQ"); 842 843 preq.preq_flags = IEEE80211_MESHPREQ_FLAGS_AM; 844 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 845 preq.preq_flags |= IEEE80211_MESHPREQ_FLAGS_GATE; 846 if (hs->hs_rootmode == IEEE80211_HWMP_ROOTMODE_PROACTIVE) 847 preq.preq_flags |= IEEE80211_MESHPREQ_FLAGS_PP; 848 preq.preq_hopcount = 0; 849 preq.preq_ttl = ms->ms_ttl; 850 preq.preq_id = ++hs->hs_preqid; 851 IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr); 852 preq.preq_origseq = ++hs->hs_seq; 853 preq.preq_lifetime = ticks_to_msecs(ieee80211_hwmp_roottimeout); 854 preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL; 855 preq.preq_tcount = 1; 856 IEEE80211_ADDR_COPY(PREQ_TADDR(0), broadcastaddr); 857 PREQ_TFLAGS(0) = IEEE80211_MESHPREQ_TFLAGS_TO | 858 IEEE80211_MESHPREQ_TFLAGS_USN; 859 PREQ_TSEQ(0) = 0; 860 vap->iv_stats.is_hwmp_rootreqs++; 861 hwmp_send_preq(vap->iv_bss, vap->iv_myaddr, broadcastaddr, &preq, 862 NULL, NULL); /* NB: we enforce rate check ourself */ 863 hwmp_rootmode_setup(vap); 864} 865#undef PREQ_TFLAGS 866#undef PREQ_TADDR 867#undef PREQ_TSEQ 868 869/* 870 * Send a Root Annoucement (RANN) to find all the nodes on the mesh. We are 871 * called when the vap is configured as a HWMP RANN root node. 872 */ 873static void 874hwmp_rootmode_rann_cb(void *arg) 875{ 876 struct ieee80211vap *vap = (struct ieee80211vap *)arg; 877 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 878 struct ieee80211_mesh_state *ms = vap->iv_mesh; 879 struct ieee80211_meshrann_ie rann; 880 881 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, vap->iv_bss, 882 "%s", "send broadcast RANN"); 883 884 rann.rann_flags = 0; 885 if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) 886 rann.rann_flags |= IEEE80211_MESHFLAGS_GATE; 887 rann.rann_hopcount = 0; 888 rann.rann_ttl = ms->ms_ttl; 889 IEEE80211_ADDR_COPY(rann.rann_addr, vap->iv_myaddr); 890 rann.rann_seq = ++hs->hs_seq; 891 rann.rann_interval = ieee80211_hwmp_rannint; 892 rann.rann_metric = IEEE80211_MESHLMETRIC_INITIALVAL; 893 894 vap->iv_stats.is_hwmp_rootrann++; 895 hwmp_send_rann(vap->iv_bss, vap->iv_myaddr, broadcastaddr, &rann); 896 hwmp_rootmode_setup(vap); 897} 898 899#define PREQ_TFLAGS(n) preq->preq_targets[n].target_flags 900#define PREQ_TADDR(n) preq->preq_targets[n].target_addr 901#define PREQ_TSEQ(n) preq->preq_targets[n].target_seq 902static void 903hwmp_recv_preq(struct ieee80211vap *vap, struct ieee80211_node *ni, 904 const struct ieee80211_frame *wh, const struct ieee80211_meshpreq_ie *preq) 905{ 906 struct ieee80211_mesh_state *ms = vap->iv_mesh; 907 struct ieee80211_mesh_route *rtorig = NULL; 908 struct ieee80211_mesh_route *rtorig_ext = NULL; 909 struct ieee80211_mesh_route *rttarg = NULL; 910 struct ieee80211_hwmp_route *hrorig = NULL; 911 struct ieee80211_hwmp_route *hrtarg = NULL; 912 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 913 struct ieee80211_meshprep_ie prep; 914 ieee80211_hwmp_seq preqid; /* last seen preqid for orig */ 915 916 if (ni == vap->iv_bss || 917 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 918 return; 919 /* 920 * Ignore PREQs from us. Could happen because someone forward it 921 * back to us. 922 */ 923 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, preq->preq_origaddr)) 924 return; 925 926 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 927 "received PREQ, orig %6D, targ(0) %6D", preq->preq_origaddr, ":", 928 PREQ_TADDR(0), ":"); 929 930 /* 931 * Acceptance criteria: (if the PREQ is not for us or not broadcast, 932 * or an external mac address not proxied by us), 933 * AND forwarding is disabled, discard this PREQ. 934 */ 935 rttarg = ieee80211_mesh_rt_find(vap, PREQ_TADDR(0)); 936 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD) && 937 (!IEEE80211_ADDR_EQ(vap->iv_myaddr, PREQ_TADDR(0)) || 938 !IEEE80211_IS_MULTICAST(PREQ_TADDR(0)) || 939 (rttarg != NULL && 940 rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && 941 IEEE80211_ADDR_EQ(vap->iv_myaddr, rttarg->rt_mesh_gate)))) { 942 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_HWMP, 943 preq->preq_origaddr, NULL, "%s", "not accepting PREQ"); 944 return; 945 } 946 /* 947 * Acceptance criteria: if unicast addressed 948 * AND no valid forwarding for Target of PREQ, discard this PREQ. 949 */ 950 if(rttarg != NULL) 951 hrtarg = IEEE80211_MESH_ROUTE_PRIV(rttarg, 952 struct ieee80211_hwmp_route); 953 /* Address mode: ucast */ 954 if((preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AM) == 0 && 955 rttarg == NULL && 956 !IEEE80211_ADDR_EQ(vap->iv_myaddr, PREQ_TADDR(0))) { 957 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_HWMP, 958 preq->preq_origaddr, NULL, 959 "unicast addressed PREQ of unknown target %6D", 960 PREQ_TADDR(0), ":"); 961 return; 962 } 963 964 /* PREQ ACCEPTED */ 965 966 rtorig = ieee80211_mesh_rt_find(vap, preq->preq_origaddr); 967 if (rtorig == NULL) { 968 rtorig = ieee80211_mesh_rt_add(vap, preq->preq_origaddr); 969 if (rtorig == NULL) { 970 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 971 "unable to add orig path to %6D", 972 preq->preq_origaddr, ":"); 973 vap->iv_stats.is_mesh_rtaddfailed++; 974 return; 975 } 976 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 977 "adding originator %6D", preq->preq_origaddr, ":"); 978 } 979 hrorig = IEEE80211_MESH_ROUTE_PRIV(rtorig, struct ieee80211_hwmp_route); 980 981 /* record last seen preqid */ 982 preqid = hrorig->hr_preqid; 983 hrorig->hr_preqid = HWMP_SEQ_MAX(hrorig->hr_preqid, preq->preq_id); 984 985 /* Data creation and update of forwarding information 986 * according to Table 11C-8 for originator mesh STA. 987 */ 988 if (HWMP_SEQ_GT(preq->preq_origseq, hrorig->hr_seq) || 989 (HWMP_SEQ_EQ(preq->preq_origseq, hrorig->hr_seq) && 990 preq->preq_metric < rtorig->rt_metric)) { 991 hrorig->hr_seq = preq->preq_origseq; 992 IEEE80211_ADDR_COPY(rtorig->rt_nexthop, wh->i_addr2); 993 rtorig->rt_metric = preq->preq_metric + 994 ms->ms_pmetric->mpm_metric(ni); 995 rtorig->rt_nhops = preq->preq_hopcount + 1; 996 ieee80211_mesh_rt_update(rtorig, preq->preq_lifetime); 997 /* path to orig is valid now */ 998 rtorig->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID; 999 }else if ((hrtarg != NULL && 1000 HWMP_SEQ_EQ(hrtarg->hr_seq, PREQ_TSEQ(0)) && 1001 ((rtorig->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)) || 1002 preqid >= preq->preq_id) { 1003 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1004 "discard PREQ from %6D, old seqno %u <= %u," 1005 " or old preqid %u < %u", 1006 preq->preq_origaddr, ":", 1007 preq->preq_origseq, hrorig->hr_seq, 1008 preq->preq_id, preqid); 1009 return; 1010 } 1011 1012 /* 1013 * Forwarding information for transmitter mesh STA 1014 * [OPTIONAL: if metric improved] 1015 */ 1016 1017 /* 1018 * Check if the PREQ is addressed to us. 1019 * or a Proxy currently supplied by us. 1020 */ 1021 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, PREQ_TADDR(0)) || 1022 (rttarg != NULL && 1023 rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && 1024 rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_VALID)) { 1025 /* 1026 * When we are the target we shall update our own HWMP seq 1027 * number with max of (current and preq->seq) + 1 1028 */ 1029 hs->hs_seq = HWMP_SEQ_MAX(hs->hs_seq, PREQ_TSEQ(0)) + 1; 1030 1031 prep.prep_flags = 0; 1032 if (rttarg != NULL && /* if NULL it means we are the target */ 1033 rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1034 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1035 "reply for proxy %6D", rttarg->rt_dest, ":"); 1036 prep.prep_flags |= IEEE80211_MESHPREP_FLAGS_AE; 1037 IEEE80211_ADDR_COPY(prep.prep_target_ext_addr, 1038 rttarg->rt_dest); 1039 /* update proxy seqno to HWMP seqno */ 1040 rttarg->rt_ext_seq = hs->hs_seq; 1041 } 1042 /* 1043 * Build and send a PREP frame. 1044 */ 1045 prep.prep_hopcount = 0; 1046 prep.prep_ttl = ms->ms_ttl; 1047 IEEE80211_ADDR_COPY(prep.prep_targetaddr, vap->iv_myaddr); 1048 prep.prep_targetseq = hs->hs_seq; 1049 prep.prep_lifetime = preq->preq_lifetime; 1050 prep.prep_metric = IEEE80211_MESHLMETRIC_INITIALVAL; 1051 IEEE80211_ADDR_COPY(prep.prep_origaddr, preq->preq_origaddr); 1052 prep.prep_origseq = preq->preq_origseq; 1053 1054 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1055 "reply to %6D", preq->preq_origaddr, ":"); 1056 hwmp_send_prep(ni, vap->iv_myaddr, wh->i_addr2, &prep); 1057 return; 1058 } 1059 /* we may update our proxy information for the orig external */ 1060 else if (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE) { 1061 rtorig_ext = 1062 ieee80211_mesh_rt_find(vap, preq->preq_orig_ext_addr); 1063 if (rtorig_ext == NULL) { 1064 rtorig_ext = ieee80211_mesh_rt_add(vap, 1065 preq->preq_orig_ext_addr); 1066 if (rtorig_ext == NULL) { 1067 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1068 "unable to add orig ext proxy to %6D", 1069 preq->preq_orig_ext_addr, ":"); 1070 vap->iv_stats.is_mesh_rtaddfailed++; 1071 return; 1072 } 1073 IEEE80211_ADDR_COPY(rtorig_ext->rt_mesh_gate, 1074 preq->preq_origaddr); 1075 } 1076 rtorig_ext->rt_ext_seq = preq->preq_origseq; 1077 ieee80211_mesh_rt_update(rtorig_ext, preq->preq_lifetime); 1078 } 1079 /* 1080 * Proactive PREQ: reply with a proactive PREP to the 1081 * root STA if requested. 1082 */ 1083 if (IEEE80211_ADDR_EQ(PREQ_TADDR(0), broadcastaddr) && 1084 (PREQ_TFLAGS(0) & IEEE80211_MESHPREQ_TFLAGS_TO)) { 1085 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1086 "root mesh station @ %6D", preq->preq_origaddr, ":"); 1087 1088 /* 1089 * Reply with a PREP if we don't have a path to the root 1090 * or if the root sent us a proactive PREQ. 1091 */ 1092 if ((rtorig->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 || 1093 (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_PP)) { 1094 prep.prep_flags = 0; 1095 prep.prep_hopcount = 0; 1096 prep.prep_ttl = ms->ms_ttl; 1097 IEEE80211_ADDR_COPY(prep.prep_origaddr, 1098 preq->preq_origaddr); 1099 prep.prep_origseq = preq->preq_origseq; 1100 prep.prep_lifetime = preq->preq_lifetime; 1101 prep.prep_metric = IEEE80211_MESHLMETRIC_INITIALVAL; 1102 IEEE80211_ADDR_COPY(prep.prep_targetaddr, 1103 vap->iv_myaddr); 1104 prep.prep_targetseq = ++hs->hs_seq; 1105 hwmp_send_prep(vap->iv_bss, vap->iv_myaddr, 1106 rtorig->rt_nexthop, &prep); 1107 } 1108 } 1109 1110 /* 1111 * Forwarding and Intermediate reply for PREQs with 1 target. 1112 */ 1113 if ((preq->preq_tcount == 1) && (preq->preq_ttl > 1) && 1114 (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1115 struct ieee80211_meshpreq_ie ppreq; /* propagated PREQ */ 1116 1117 memcpy(&ppreq, preq, sizeof(ppreq)); 1118 1119 /* 1120 * We have a valid route to this node. 1121 */ 1122 if (rttarg != NULL && 1123 (rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_VALID)) { 1124 /* 1125 * Check if we can send an intermediate Path Reply, 1126 * i.e., Target Only bit is not set and target is not 1127 * the MAC broadcast address. 1128 */ 1129 if (!(PREQ_TFLAGS(0) & IEEE80211_MESHPREQ_TFLAGS_TO) && 1130 !IEEE80211_ADDR_EQ(PREQ_TADDR(0), broadcastaddr)) { 1131 struct ieee80211_meshprep_ie prep; 1132 1133 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1134 "intermediate reply for PREQ from %6D", 1135 preq->preq_origaddr, ":"); 1136 prep.prep_flags = 0; 1137 prep.prep_hopcount = rttarg->rt_nhops; 1138 prep.prep_ttl = ms->ms_ttl; 1139 IEEE80211_ADDR_COPY(&prep.prep_targetaddr, 1140 PREQ_TADDR(0)); 1141 prep.prep_targetseq = hrtarg->hr_seq; 1142 prep.prep_lifetime = preq->preq_lifetime; 1143 prep.prep_metric =rttarg->rt_metric; 1144 IEEE80211_ADDR_COPY(&prep.prep_origaddr, 1145 preq->preq_origaddr); 1146 prep.prep_origseq = hrorig->hr_seq; 1147 hwmp_send_prep(ni, vap->iv_myaddr, 1148 rtorig->rt_nexthop, &prep); 1149 1150 /* 1151 * Set TO and unset RF bits because we have 1152 * sent a PREP. 1153 */ 1154 ppreq.preq_targets[0].target_flags |= 1155 IEEE80211_MESHPREQ_TFLAGS_TO; 1156 } 1157 } 1158 1159 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1160 "forward PREQ from %6D", 1161 preq->preq_origaddr, ":"); 1162 ppreq.preq_hopcount += 1; 1163 ppreq.preq_ttl -= 1; 1164 ppreq.preq_metric += ms->ms_pmetric->mpm_metric(ni); 1165 1166 /* don't do PREQ ratecheck when we propagate */ 1167 hwmp_send_preq(ni, vap->iv_myaddr, broadcastaddr, 1168 &ppreq, NULL, NULL); 1169 } 1170} 1171#undef PREQ_TFLAGS 1172#undef PREQ_TADDR 1173#undef PREQ_TSEQ 1174 1175static int 1176hwmp_send_preq(struct ieee80211_node *ni, 1177 const uint8_t sa[IEEE80211_ADDR_LEN], 1178 const uint8_t da[IEEE80211_ADDR_LEN], 1179 struct ieee80211_meshpreq_ie *preq, 1180 struct timeval *last, struct timeval *minint) 1181{ 1182 1183 /* 1184 * Enforce PREQ interval. 1185 * NB: Proactive ROOT PREQs rate is handled by cb task. 1186 */ 1187 if (last != NULL && minint != NULL) { 1188 if (ratecheck(last, minint) == 0) 1189 return EALREADY; /* XXX: we should postpone */ 1190 getmicrouptime(last); 1191 } 1192 1193 /* 1194 * mesh preq action frame format 1195 * [6] da 1196 * [6] sa 1197 * [6] addr3 = sa 1198 * [1] action 1199 * [1] category 1200 * [tlv] mesh path request 1201 */ 1202 preq->preq_ie = IEEE80211_ELEMID_MESHPREQ; 1203 preq->preq_len = (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE ? 1204 IEEE80211_MESHPREQ_BASE_SZ_AE : IEEE80211_MESHPREQ_BASE_SZ) + 1205 preq->preq_tcount * IEEE80211_MESHPREQ_TRGT_SZ; 1206 return hwmp_send_action(ni, sa, da, (uint8_t *)preq, preq->preq_len+2); 1207} 1208 1209static void 1210hwmp_recv_prep(struct ieee80211vap *vap, struct ieee80211_node *ni, 1211 const struct ieee80211_frame *wh, const struct ieee80211_meshprep_ie *prep) 1212{ 1213#define IS_PROXY(rt) (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) 1214#define PROXIED_BY_US(rt) \ 1215 (IEEE80211_ADDR_EQ(vap->iv_myaddr, rt->rt_mesh_gate)) 1216 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1217 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 1218 struct ieee80211_mesh_route *rt = NULL; 1219 struct ieee80211_mesh_route *rtorig = NULL; 1220 struct ieee80211_mesh_route *rtext = NULL; 1221 struct ieee80211_hwmp_route *hr; 1222 struct ieee80211com *ic = vap->iv_ic; 1223 struct ifnet *ifp = vap->iv_ifp; 1224 struct mbuf *m, *next; 1225 uint32_t metric = 0; 1226 const uint8_t *addr; 1227 1228 if (ni == vap->iv_bss || 1229 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 1230 return; 1231 1232 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1233 "received PREP, orig %6D, targ %6D", prep->prep_origaddr, ":", 1234 prep->prep_targetaddr, ":"); 1235 1236 /* 1237 * Acceptance criteria: (If the corresponding PREP was not generated 1238 * by us OR not generated by an external mac that is not proxied by us) 1239 * AND forwarding is disabled, discard this PREP. 1240 */ 1241 rtorig = ieee80211_mesh_rt_find(vap, prep->prep_origaddr); 1242 if ((!IEEE80211_ADDR_EQ(vap->iv_myaddr, prep->prep_origaddr) || 1243 (rtorig != NULL && IS_PROXY(rtorig) && !PROXIED_BY_US(rtorig))) && 1244 !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)){ 1245 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1246 "discard PREP, orig(%6D) not proxied or generated by us", 1247 prep->prep_origaddr, ":"); 1248 return; 1249 } 1250 1251 /* PREP ACCEPTED */ 1252 1253 /* 1254 * If accepted shall create or update the active forwarding information 1255 * it maintains for the target mesh STA of the PREP (according to the 1256 * rules defined in 13.10.8.4). If the conditions for creating or 1257 * updating the forwarding information have not been met in those 1258 * rules, no further steps are applied to the PREP. 1259 * [OPTIONAL]: update forwarding information to TA if metric improves. 1260 */ 1261 rt = ieee80211_mesh_rt_find(vap, prep->prep_targetaddr); 1262 if (rt == NULL) { 1263 rt = ieee80211_mesh_rt_add(vap, prep->prep_targetaddr); 1264 if (rt == NULL) { 1265 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1266 "unable to add PREP path to %6D", 1267 prep->prep_targetaddr, ":"); 1268 vap->iv_stats.is_mesh_rtaddfailed++; 1269 return; 1270 } 1271 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1272 "adding target %6D", prep->prep_targetaddr, ":"); 1273 } 1274 hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); 1275 /* update path metric */ 1276 metric = prep->prep_metric + ms->ms_pmetric->mpm_metric(ni); 1277 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID)) { 1278 if (HWMP_SEQ_LT(prep->prep_targetseq, hr->hr_seq)) { 1279 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1280 "discard PREP from %6D, old seq no %u < %u", 1281 prep->prep_targetaddr, ":", 1282 prep->prep_targetseq, hr->hr_seq); 1283 return; 1284 } else if (HWMP_SEQ_LEQ(prep->prep_targetseq, hr->hr_seq) && 1285 metric > rt->rt_metric) { 1286 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1287 "discard PREP from %6D, new metric %u > %u", 1288 prep->prep_targetaddr, ":", 1289 prep->prep_metric, rt->rt_metric); 1290 return; 1291 } 1292 } 1293 1294 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1295 "%s path to %6D, hopcount %d:%d metric %d:%d", 1296 rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID ? 1297 "prefer" : "update", 1298 prep->prep_targetaddr, ":", 1299 rt->rt_nhops, prep->prep_hopcount, 1300 rt->rt_metric, metric); 1301 1302 hr->hr_seq = prep->prep_targetseq; 1303 hr->hr_preqretries = 0; 1304 IEEE80211_ADDR_COPY(rt->rt_nexthop, ni->ni_macaddr); 1305 rt->rt_metric = metric; 1306 rt->rt_nhops = prep->prep_hopcount + 1; 1307 ieee80211_mesh_rt_update(rt, prep->prep_lifetime); 1308 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) { 1309 /* discovery complete */ 1310 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_DISCOVER; 1311 } 1312 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID; /* mark valid */ 1313 1314 /* 1315 * If it's NOT for us, propagate the PREP 1316 */ 1317 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, prep->prep_origaddr) && 1318 prep->prep_ttl > 1 && 1319 prep->prep_hopcount < hs->hs_maxhops) { 1320 struct ieee80211_meshprep_ie pprep; /* propagated PREP */ 1321 /* 1322 * NB: We should already have setup the path to orig 1323 * mesh STA when we propagated PREQ to target mesh STA, 1324 * no PREP is generated without a corresponding PREQ. 1325 * XXX: for now just ignore. 1326 */ 1327 if (rtorig == NULL) { 1328 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1329 "received PREP for an unknown orig(%6D)", 1330 prep->prep_origaddr, ":"); 1331 return; 1332 } 1333 1334 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1335 "propagate PREP from %6D", 1336 prep->prep_targetaddr, ":"); 1337 1338 memcpy(&pprep, prep, sizeof(pprep)); 1339 pprep.prep_hopcount += 1; 1340 pprep.prep_ttl -= 1; 1341 pprep.prep_metric += ms->ms_pmetric->mpm_metric(ni); 1342 hwmp_send_prep(ni, vap->iv_myaddr, rtorig->rt_nexthop, &pprep); 1343 1344 /* precursor list for the Target Mesh STA Address is updated */ 1345 } 1346 1347 /* 1348 * Check if we received a PREP w/ AE and store target external address. 1349 * We may store target external address if recevied PREP w/ AE 1350 * and we are not final destination 1351 */ 1352 if (prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE) { 1353 rtext = ieee80211_mesh_rt_find(vap, 1354 prep->prep_target_ext_addr); 1355 if (rtext == NULL) { 1356 rtext = ieee80211_mesh_rt_add(vap, 1357 prep->prep_target_ext_addr); 1358 if (rtext == NULL) { 1359 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1360 "unable to add PREP path to proxy %6D", 1361 prep->prep_targetaddr, ":"); 1362 vap->iv_stats.is_mesh_rtaddfailed++; 1363 return; 1364 } 1365 } 1366 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1367 "%s path to %6D, hopcount %d:%d metric %d:%d", 1368 rtext->rt_flags & IEEE80211_MESHRT_FLAGS_VALID ? 1369 "prefer" : "update", 1370 prep->prep_target_ext_addr, ":", 1371 rtext->rt_nhops, prep->prep_hopcount, 1372 rtext->rt_metric, metric); 1373 1374 rtext->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1375 IEEE80211_MESHRT_FLAGS_VALID; 1376 IEEE80211_ADDR_COPY(rtext->rt_dest, 1377 prep->prep_target_ext_addr); 1378 IEEE80211_ADDR_COPY(rtext->rt_mesh_gate, 1379 prep->prep_targetaddr); 1380 IEEE80211_ADDR_COPY(rtext->rt_nexthop, wh->i_addr2); 1381 rtext->rt_metric = metric; 1382 rtext->rt_lifetime = prep->prep_lifetime; 1383 rtext->rt_nhops = prep->prep_hopcount + 1; 1384 rtext->rt_ext_seq = prep->prep_origseq; /* new proxy seq */ 1385 /* 1386 * XXX: proxy entries have no HWMP priv data, 1387 * nullify them to be sure? 1388 */ 1389 } 1390 /* 1391 * Check for frames queued awaiting path discovery. 1392 * XXX probably can tell exactly and avoid remove call 1393 * NB: hash may have false matches, if so they will get 1394 * stuck back on the stageq because there won't be 1395 * a path. 1396 */ 1397 addr = prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE ? 1398 prep->prep_target_ext_addr : prep->prep_targetaddr; 1399 m = ieee80211_ageq_remove(&ic->ic_stageq, 1400 (struct ieee80211_node *)(uintptr_t) 1401 ieee80211_mac_hash(ic, addr)); /* either dest or ext_dest */ 1402 for (; m != NULL; m = next) { 1403 next = m->m_nextpkt; 1404 m->m_nextpkt = NULL; 1405 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1406 "flush queued frame %p len %d", m, m->m_pkthdr.len); 1407 ifp->if_transmit(ifp, m); 1408 } 1409#undef IS_PROXY 1410#undef PROXIED_BY_US 1411} 1412 1413static int 1414hwmp_send_prep(struct ieee80211_node *ni, 1415 const uint8_t sa[IEEE80211_ADDR_LEN], 1416 const uint8_t da[IEEE80211_ADDR_LEN], 1417 struct ieee80211_meshprep_ie *prep) 1418{ 1419 /* NB: there's no PREP minimum interval. */ 1420 1421 /* 1422 * mesh prep action frame format 1423 * [6] da 1424 * [6] sa 1425 * [6] addr3 = sa 1426 * [1] action 1427 * [1] category 1428 * [tlv] mesh path reply 1429 */ 1430 prep->prep_ie = IEEE80211_ELEMID_MESHPREP; 1431 prep->prep_len = prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE ? 1432 IEEE80211_MESHPREP_BASE_SZ_AE : IEEE80211_MESHPREP_BASE_SZ; 1433 return hwmp_send_action(ni, sa, da, (uint8_t *)prep, 1434 prep->prep_len + 2); 1435} 1436 1437#define PERR_DFLAGS(n) perr.perr_dests[n].dest_flags 1438#define PERR_DADDR(n) perr.perr_dests[n].dest_addr 1439#define PERR_DSEQ(n) perr.perr_dests[n].dest_seq 1440#define PERR_DRCODE(n) perr.perr_dests[n].dest_rcode 1441static void 1442hwmp_peerdown(struct ieee80211_node *ni) 1443{ 1444 struct ieee80211vap *vap = ni->ni_vap; 1445 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1446 struct ieee80211_meshperr_ie perr; 1447 struct ieee80211_mesh_route *rt; 1448 struct ieee80211_hwmp_route *hr; 1449 1450 rt = ieee80211_mesh_rt_find(vap, ni->ni_macaddr); 1451 if (rt == NULL) 1452 return; 1453 hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); 1454 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1455 "%s", "delete route entry"); 1456 perr.perr_ttl = ms->ms_ttl; 1457 perr.perr_ndests = 1; 1458 PERR_DFLAGS(0) = 0; 1459 if (hr->hr_seq == 0) 1460 PERR_DFLAGS(0) |= IEEE80211_MESHPERR_DFLAGS_USN; 1461 PERR_DFLAGS(0) |= IEEE80211_MESHPERR_DFLAGS_RC; 1462 IEEE80211_ADDR_COPY(PERR_DADDR(0), rt->rt_dest); 1463 PERR_DSEQ(0) = ++hr->hr_seq; 1464 PERR_DRCODE(0) = IEEE80211_REASON_MESH_PERR_DEST_UNREACH; 1465 /* NB: flush everything passing through peer */ 1466 ieee80211_mesh_rt_flush_peer(vap, ni->ni_macaddr); 1467 hwmp_send_perr(vap->iv_bss, vap->iv_myaddr, broadcastaddr, &perr); 1468} 1469#undef PERR_DFLAGS 1470#undef PERR_DADDR 1471#undef PERR_DSEQ 1472#undef PERR_DRCODE 1473 1474#define PERR_DFLAGS(n) perr->perr_dests[n].dest_flags 1475#define PERR_DADDR(n) perr->perr_dests[n].dest_addr 1476#define PERR_DSEQ(n) perr->perr_dests[n].dest_seq 1477#define PERR_DEXTADDR(n) perr->perr_dests[n].dest_ext_addr 1478#define PERR_DRCODE(n) perr->perr_dests[n].dest_rcode 1479static void 1480hwmp_recv_perr(struct ieee80211vap *vap, struct ieee80211_node *ni, 1481 const struct ieee80211_frame *wh, const struct ieee80211_meshperr_ie *perr) 1482{ 1483 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1484 struct ieee80211_mesh_route *rt = NULL; 1485 struct ieee80211_mesh_route *rt_ext = NULL; 1486 struct ieee80211_hwmp_route *hr; 1487 struct ieee80211_meshperr_ie *pperr = NULL; 1488 int i, j = 0, forward = 0; 1489 1490 if (ni == vap->iv_bss || 1491 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) 1492 return; 1493 1494 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1495 "received PERR from %6D", wh->i_addr2, ":"); 1496 1497 /* 1498 * if forwarding is true, prepare pperr 1499 */ 1500 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) { 1501 forward = 1; 1502 pperr = malloc(sizeof(*perr) + 31*sizeof(*perr->perr_dests), 1503 M_80211_MESH_PERR, M_NOWAIT); /* XXX: magic number, 32 err dests */ 1504 } 1505 1506 /* 1507 * Acceptance criteria: check if we have forwarding information 1508 * stored about destination, and that nexthop == TA of this PERR. 1509 * NB: we also build a new PERR to propagate in case we should forward. 1510 */ 1511 for (i = 0; i < perr->perr_ndests; i++) { 1512 rt = ieee80211_mesh_rt_find(vap, PERR_DADDR(i)); 1513 if (rt == NULL || rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) 1514 continue; 1515 if (!IEEE80211_ADDR_EQ(rt->rt_nexthop, wh->i_addr2)) 1516 continue; 1517 1518 /* found and accepted a PERR ndest element, process it... */ 1519 if (forward) 1520 memcpy(&pperr->perr_dests[j], &perr->perr_dests[i], 1521 sizeof(*perr->perr_dests)); 1522 hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); 1523 switch(PERR_DFLAGS(i)) { 1524 case (IEEE80211_REASON_MESH_PERR_NO_FI): 1525 if (PERR_DSEQ(i) == 0) { 1526 hr->hr_seq++; 1527 if (forward) { 1528 pperr->perr_dests[j].dest_seq = 1529 hr->hr_seq; 1530 } 1531 } else { 1532 hr->hr_seq = PERR_DSEQ(i); 1533 } 1534 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 1535 j++; 1536 break; 1537 case (IEEE80211_REASON_MESH_PERR_DEST_UNREACH): 1538 if(HWMP_SEQ_GT(PERR_DSEQ(i), hr->hr_seq)) { 1539 hr->hr_seq = PERR_DSEQ(i); 1540 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 1541 j++; 1542 } 1543 break; 1544 case (IEEE80211_REASON_MESH_PERR_NO_PROXY): 1545 rt_ext = ieee80211_mesh_rt_find(vap, PERR_DEXTADDR(i)); 1546 if (rt_ext != NULL) { 1547 rt_ext->rt_flags &= 1548 ~IEEE80211_MESHRT_FLAGS_VALID; 1549 j++; 1550 } 1551 break; 1552 default: 1553 IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, 1554 "PERR, unknown reason code %u\n", PERR_DFLAGS(i)); 1555 goto done; /* XXX: stats?? */ 1556 } 1557 ieee80211_mesh_rt_flush_peer(vap, rt->rt_dest); 1558 KASSERT(j < 32, ("PERR, error ndest >= 32 (%u)", j)); 1559 } 1560 if (j == 0) { 1561 IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, "%s", 1562 "PERR not accepted"); 1563 goto done; /* XXX: stats?? */ 1564 } 1565 1566 /* 1567 * Propagate the PERR if we previously found it on our routing table. 1568 */ 1569 if (forward && perr->perr_ttl > 1) { 1570 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1571 "propagate PERR from %6D", wh->i_addr2, ":"); 1572 pperr->perr_ndests = j; 1573 pperr->perr_ttl--; 1574 hwmp_send_perr(vap->iv_bss, vap->iv_myaddr, broadcastaddr, 1575 pperr); 1576 } 1577done: 1578 if (pperr != NULL) 1579 free(pperr, M_80211_MESH_PERR); 1580} 1581#undef PERR_DFLAGS 1582#undef PERR_DADDR 1583#undef PERR_DSEQ 1584#undef PERR_DEXTADDR 1585#undef PERR_DRCODE 1586 1587static int 1588hwmp_send_perr(struct ieee80211_node *ni, 1589 const uint8_t sa[IEEE80211_ADDR_LEN], 1590 const uint8_t da[IEEE80211_ADDR_LEN], 1591 struct ieee80211_meshperr_ie *perr) 1592{ 1593 struct ieee80211_hwmp_state *hs = ni->ni_vap->iv_hwmp; 1594 int i; 1595 uint8_t length = 0; 1596 1597 /* 1598 * Enforce PERR interval. 1599 */ 1600 if (ratecheck(&hs->hs_lastperr, &ieee80211_hwmp_perrminint) == 0) 1601 return EALREADY; 1602 getmicrouptime(&hs->hs_lastperr); 1603 1604 /* 1605 * mesh perr action frame format 1606 * [6] da 1607 * [6] sa 1608 * [6] addr3 = sa 1609 * [1] action 1610 * [1] category 1611 * [tlv] mesh path error 1612 */ 1613 perr->perr_ie = IEEE80211_ELEMID_MESHPERR; 1614 length = IEEE80211_MESHPERR_BASE_SZ; 1615 for (i = 0; i<perr->perr_ndests; i++) { 1616 if (perr->perr_dests[i].dest_flags & 1617 IEEE80211_MESHPERR_FLAGS_AE) { 1618 length += IEEE80211_MESHPERR_DEST_SZ_AE; 1619 continue ; 1620 } 1621 length += IEEE80211_MESHPERR_DEST_SZ; 1622 } 1623 perr->perr_len =length; 1624 return hwmp_send_action(ni, sa, da, (uint8_t *)perr, perr->perr_len+2); 1625} 1626 1627/* 1628 * Called from the rest of the net80211 code (mesh code for example). 1629 * NB: IEEE80211_REASON_MESH_PERR_DEST_UNREACH can be trigger by the fact that 1630 * a mesh STA is unable to forward an MSDU/MMPDU to a next-hop mesh STA. 1631 */ 1632#define PERR_DFLAGS(n) perr.perr_dests[n].dest_flags 1633#define PERR_DADDR(n) perr.perr_dests[n].dest_addr 1634#define PERR_DSEQ(n) perr.perr_dests[n].dest_seq 1635#define PERR_DEXTADDR(n) perr.perr_dests[n].dest_ext_addr 1636#define PERR_DRCODE(n) perr.perr_dests[n].dest_rcode 1637static void 1638hwmp_senderror(struct ieee80211vap *vap, 1639 const uint8_t addr[IEEE80211_ADDR_LEN], 1640 struct ieee80211_mesh_route *rt, int rcode) 1641{ 1642 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1643 struct ieee80211_hwmp_route *hr = NULL; 1644 struct ieee80211_meshperr_ie perr; 1645 1646 if (rt != NULL) 1647 hr = IEEE80211_MESH_ROUTE_PRIV(rt, 1648 struct ieee80211_hwmp_route); 1649 1650 perr.perr_ndests = 1; 1651 perr.perr_ttl = ms->ms_ttl; 1652 PERR_DFLAGS(0) = 0; 1653 PERR_DRCODE(0) = rcode; 1654 1655 switch (rcode) { 1656 case IEEE80211_REASON_MESH_PERR_NO_FI: 1657 IEEE80211_ADDR_COPY(PERR_DADDR(0), addr); 1658 PERR_DSEQ(0) = 0; /* reserved */ 1659 break; 1660 case IEEE80211_REASON_MESH_PERR_NO_PROXY: 1661 KASSERT(rt != NULL, ("no proxy info for sending PERR")); 1662 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 1663 ("route is not marked proxy")); 1664 PERR_DFLAGS(0) |= IEEE80211_MESHPERR_FLAGS_AE; 1665 IEEE80211_ADDR_COPY(PERR_DADDR(0), vap->iv_myaddr); 1666 PERR_DSEQ(0) = rt->rt_ext_seq; 1667 IEEE80211_ADDR_COPY(PERR_DEXTADDR(0), addr); 1668 break; 1669 case IEEE80211_REASON_MESH_PERR_DEST_UNREACH: 1670 KASSERT(rt != NULL, ("no route info for sending PERR")); 1671 IEEE80211_ADDR_COPY(PERR_DADDR(0), addr); 1672 PERR_DSEQ(0) = hr->hr_seq; 1673 break; 1674 default: 1675 KASSERT(0, ("unknown reason code for HWMP PERR (%u)", rcode)); 1676 } 1677 hwmp_send_perr(vap->iv_bss, vap->iv_myaddr, broadcastaddr, &perr); 1678} 1679#undef PERR_DFLAGS 1680#undef PEER_DADDR 1681#undef PERR_DSEQ 1682#undef PERR_DEXTADDR 1683#undef PERR_DRCODE 1684 1685static void 1686hwmp_recv_rann(struct ieee80211vap *vap, struct ieee80211_node *ni, 1687 const struct ieee80211_frame *wh, const struct ieee80211_meshrann_ie *rann) 1688{ 1689 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1690 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 1691 struct ieee80211_mesh_route *rt = NULL; 1692 struct ieee80211_hwmp_route *hr; 1693 struct ieee80211_meshpreq_ie preq; 1694 struct ieee80211_meshrann_ie prann; 1695 uint32_t metric = 0; 1696 1697 if (ni == vap->iv_bss || 1698 ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED || 1699 IEEE80211_ADDR_EQ(rann->rann_addr, vap->iv_myaddr)) 1700 return; 1701 1702 rt = ieee80211_mesh_rt_find(vap, rann->rann_addr); 1703 if (rt != NULL && rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 1704 hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); 1705 1706 /* Acceptance criteria: if RANN.seq < stored seq, discard RANN */ 1707 if (HWMP_SEQ_LT(rann->rann_seq, hr->hr_seq)) { 1708 IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, 1709 "RANN seq %u < %u", rann->rann_seq, hr->hr_seq); 1710 return; 1711 } 1712 1713 /* Acceptance criteria: if RANN.seq == stored seq AND 1714 * RANN.metric > stored metric, discard RANN */ 1715 if (HWMP_SEQ_EQ(rann->rann_seq, hr->hr_seq) && 1716 rann->rann_metric > rt->rt_metric) { 1717 IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, 1718 "RANN metric %u > %u", rann->rann_metric, rt->rt_metric); 1719 return; 1720 } 1721 } 1722 1723 /* RANN ACCEPTED */ 1724 1725 ieee80211_hwmp_rannint = rann->rann_interval; /* XXX: mtx lock? */ 1726 metric = rann->rann_metric + ms->ms_pmetric->mpm_metric(ni); 1727 1728 if (rt == NULL) { 1729 rt = ieee80211_mesh_rt_add(vap, rann->rann_addr); 1730 if (rt == NULL) { 1731 IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, 1732 "unable to add mac for RANN root %6D", 1733 rann->rann_addr, ":"); 1734 vap->iv_stats.is_mesh_rtaddfailed++; 1735 return; 1736 } 1737 } 1738 hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); 1739 /* discovery timeout */ 1740 ieee80211_mesh_rt_update(rt, 1741 ticks_to_msecs(ieee80211_hwmp_roottimeout)); 1742 1743 preq.preq_flags = IEEE80211_MESHPREQ_FLAGS_AM; 1744 preq.preq_hopcount = 0; 1745 preq.preq_ttl = ms->ms_ttl; 1746 preq.preq_id = 0; /* reserved */ 1747 IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr); 1748 preq.preq_origseq = ++hs->hs_seq; 1749 preq.preq_lifetime = ieee80211_hwmp_roottimeout; 1750 preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL; 1751 preq.preq_tcount = 1; 1752 preq.preq_targets[0].target_flags = IEEE80211_MESHPREQ_TFLAGS_TO; 1753 /* NB: IEEE80211_MESHPREQ_TFLAGS_USN = 0 implicitly implied */ 1754 IEEE80211_ADDR_COPY(preq.preq_targets[0].target_addr, rann->rann_addr); 1755 preq.preq_targets[0].target_seq = rann->rann_seq; 1756 /* XXX: if rootconfint have not passed, we built this preq in vain */ 1757 hwmp_send_preq(vap->iv_bss, vap->iv_myaddr, wh->i_addr2, &preq, 1758 &hr->hr_lastrootconf, &ieee80211_hwmp_rootconfint); 1759 1760 /* propagate a RANN */ 1761 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID && 1762 rann->rann_ttl > 1 && 1763 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) { 1764 hr->hr_seq = rann->rann_seq; 1765 memcpy(&prann, rann, sizeof(prann)); 1766 prann.rann_hopcount += 1; 1767 prann.rann_ttl -= 1; 1768 prann.rann_metric += ms->ms_pmetric->mpm_metric(ni); 1769 hwmp_send_rann(vap->iv_bss, vap->iv_myaddr, 1770 broadcastaddr, &prann); 1771 } 1772} 1773 1774static int 1775hwmp_send_rann(struct ieee80211_node *ni, 1776 const uint8_t sa[IEEE80211_ADDR_LEN], 1777 const uint8_t da[IEEE80211_ADDR_LEN], 1778 struct ieee80211_meshrann_ie *rann) 1779{ 1780 /* 1781 * mesh rann action frame format 1782 * [6] da 1783 * [6] sa 1784 * [6] addr3 = sa 1785 * [1] action 1786 * [1] category 1787 * [tlv] root annoucement 1788 */ 1789 rann->rann_ie = IEEE80211_ELEMID_MESHRANN; 1790 rann->rann_len = IEEE80211_MESHRANN_BASE_SZ; 1791 return hwmp_send_action(ni, sa, da, (uint8_t *)rann, 1792 rann->rann_len + 2); 1793} 1794 1795#define PREQ_TFLAGS(n) preq.preq_targets[n].target_flags 1796#define PREQ_TADDR(n) preq.preq_targets[n].target_addr 1797#define PREQ_TSEQ(n) preq.preq_targets[n].target_seq 1798static void 1799hwmp_rediscover_cb(void *arg) 1800{ 1801 struct ieee80211_mesh_route *rt = arg; 1802 struct ieee80211vap *vap = rt->rt_vap; 1803 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 1804 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1805 struct ieee80211_hwmp_route *hr; 1806 struct ieee80211_meshpreq_ie preq; /* Optimize: storing first preq? */ 1807 1808 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID)) 1809 return ; /* nothing to do */ 1810 1811 hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); 1812 if (hr->hr_preqretries >= 1813 ieee80211_hwmp_maxpreq_retries) { 1814 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1815 rt->rt_dest, NULL, "%s", 1816 "no valid path , max number of discovery, send GATE"); 1817 /* TODO: send to known gates */ 1818 vap->iv_stats.is_mesh_fwd_nopath++; 1819 rt->rt_flags = 0; /* Mark invalid */ 1820 return ; /* XXX: flush queue? */ 1821 } 1822 1823 hr->hr_preqretries++; 1824 1825 1826 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, rt->rt_dest, 1827 "start path rediscovery , target seq %u", hr->hr_seq); 1828 /* 1829 * Try to discover the path for this node. 1830 * Group addressed PREQ Case A 1831 */ 1832 preq.preq_flags = 0; 1833 preq.preq_hopcount = 0; 1834 preq.preq_ttl = ms->ms_ttl; 1835 preq.preq_id = ++hs->hs_preqid; 1836 IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr); 1837 preq.preq_origseq = hr->hr_origseq; 1838 preq.preq_lifetime = ticks_to_msecs(ieee80211_hwmp_pathtimeout); 1839 preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL; 1840 preq.preq_tcount = 1; 1841 IEEE80211_ADDR_COPY(PREQ_TADDR(0), rt->rt_dest); 1842 PREQ_TFLAGS(0) = 0; 1843 if (ieee80211_hwmp_targetonly) 1844 PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_TO; 1845 PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_USN; 1846 PREQ_TSEQ(0) = 0; /* RESERVED when USN flag is set */ 1847 /* XXX check return value */ 1848 hwmp_send_preq(vap->iv_bss, vap->iv_myaddr, 1849 broadcastaddr, &preq, &hr->hr_lastpreq, 1850 &ieee80211_hwmp_preqminint); 1851 callout_reset(&rt->rt_discovery, 1852 ieee80211_hwmp_net_diameter_traversaltime * 2, 1853 hwmp_rediscover_cb, rt); 1854} 1855 1856static struct ieee80211_node * 1857hwmp_discover(struct ieee80211vap *vap, 1858 const uint8_t dest[IEEE80211_ADDR_LEN], struct mbuf *m) 1859{ 1860 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 1861 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1862 struct ieee80211_mesh_route *rt = NULL; 1863 struct ieee80211_hwmp_route *hr; 1864 struct ieee80211_meshpreq_ie preq; 1865 struct ieee80211_node *ni; 1866 int sendpreq = 0; 1867 1868 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, 1869 ("not a mesh vap, opmode %d", vap->iv_opmode)); 1870 1871 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 1872 ("%s: discovering self!", __func__)); 1873 1874 ni = NULL; 1875 if (!IEEE80211_IS_MULTICAST(dest)) { 1876 rt = ieee80211_mesh_rt_find(vap, dest); 1877 if (rt == NULL) { 1878 rt = ieee80211_mesh_rt_add(vap, dest); 1879 if (rt == NULL) { 1880 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, 1881 ni, "unable to add discovery path to %6D", 1882 dest, ":"); 1883 vap->iv_stats.is_mesh_rtaddfailed++; 1884 goto done; 1885 } 1886 } 1887 hr = IEEE80211_MESH_ROUTE_PRIV(rt, 1888 struct ieee80211_hwmp_route); 1889 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1890 if (hr->hr_lastdiscovery != 0 && 1891 (ticks - hr->hr_lastdiscovery < 1892 (ieee80211_hwmp_net_diameter_traversaltime * 2))) { 1893 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1894 dest, NULL, "%s", 1895 "too frequent discovery requeust"); 1896 /* XXX: stats? */ 1897 goto done; 1898 } 1899 hr->hr_lastdiscovery = ticks; 1900 if (hr->hr_preqretries >= 1901 ieee80211_hwmp_maxpreq_retries) { 1902 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1903 dest, NULL, "%s", 1904 "no valid path , max number of discovery"); 1905 vap->iv_stats.is_mesh_fwd_nopath++; 1906 goto done; 1907 } 1908 rt->rt_flags = IEEE80211_MESHRT_FLAGS_DISCOVER; 1909 hr->hr_preqretries++; 1910 if (hr->hr_origseq == 0) 1911 hr->hr_origseq = ++hs->hs_seq; 1912 rt->rt_metric = IEEE80211_MESHLMETRIC_INITIALVAL; 1913 sendpreq = 1; 1914 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, dest, 1915 "start path discovery (src %s), target seq %u", 1916 m == NULL ? "<none>" : ether_sprintf( 1917 mtod(m, struct ether_header *)->ether_shost), 1918 hr->hr_seq); 1919 /* 1920 * Try to discover the path for this node. 1921 * Group addressed PREQ Case A 1922 */ 1923 preq.preq_flags = 0; 1924 preq.preq_hopcount = 0; 1925 preq.preq_ttl = ms->ms_ttl; 1926 preq.preq_id = ++hs->hs_preqid; 1927 IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr); 1928 preq.preq_origseq = hr->hr_origseq; 1929 preq.preq_lifetime = 1930 ticks_to_msecs(ieee80211_hwmp_pathtimeout); 1931 preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL; 1932 preq.preq_tcount = 1; 1933 IEEE80211_ADDR_COPY(PREQ_TADDR(0), dest); 1934 PREQ_TFLAGS(0) = 0; 1935 if (ieee80211_hwmp_targetonly) 1936 PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_TO; 1937 PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_USN; 1938 PREQ_TSEQ(0) = 0; /* RESERVED when USN flag is set */ 1939 /* XXX check return value */ 1940 hwmp_send_preq(vap->iv_bss, vap->iv_myaddr, 1941 broadcastaddr, &preq, &hr->hr_lastpreq, 1942 &ieee80211_hwmp_preqminint); 1943 callout_reset(&rt->rt_discovery, 1944 ieee80211_hwmp_net_diameter_traversaltime * 2, 1945 hwmp_rediscover_cb, rt); 1946 } 1947 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) 1948 ni = ieee80211_find_txnode(vap, rt->rt_nexthop); 1949 } else { 1950 ni = ieee80211_find_txnode(vap, dest); 1951 /* NB: if null then we leak mbuf */ 1952 KASSERT(ni != NULL, ("leak mcast frame")); 1953 return ni; 1954 } 1955done: 1956 if (ni == NULL && m != NULL) { 1957 if (sendpreq) { 1958 struct ieee80211com *ic = vap->iv_ic; 1959 /* 1960 * Queue packet for transmit when path discovery 1961 * completes. If discovery never completes the 1962 * frame will be flushed by way of the aging timer. 1963 */ 1964 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, dest, 1965 "%s", "queue frame until path found"); 1966 m->m_pkthdr.rcvif = (void *)(uintptr_t) 1967 ieee80211_mac_hash(ic, dest); 1968 /* XXX age chosen randomly */ 1969 ieee80211_ageq_append(&ic->ic_stageq, m, 1970 IEEE80211_INACT_WAIT); 1971 } else { 1972 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_HWMP, 1973 dest, NULL, "%s", "no valid path to this node"); 1974 m_freem(m); 1975 } 1976 } 1977 return ni; 1978} 1979#undef PREQ_TFLAGS 1980#undef PREQ_TADDR 1981#undef PREQ_TSEQ 1982 1983static int 1984hwmp_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 1985{ 1986 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 1987 int error; 1988 1989 if (vap->iv_opmode != IEEE80211_M_MBSS) 1990 return ENOSYS; 1991 error = 0; 1992 switch (ireq->i_type) { 1993 case IEEE80211_IOC_HWMP_ROOTMODE: 1994 ireq->i_val = hs->hs_rootmode; 1995 break; 1996 case IEEE80211_IOC_HWMP_MAXHOPS: 1997 ireq->i_val = hs->hs_maxhops; 1998 break; 1999 default: 2000 return ENOSYS; 2001 } 2002 return error; 2003} 2004IEEE80211_IOCTL_GET(hwmp, hwmp_ioctl_get80211); 2005 2006static int 2007hwmp_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 2008{ 2009 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 2010 int error; 2011 2012 if (vap->iv_opmode != IEEE80211_M_MBSS) 2013 return ENOSYS; 2014 error = 0; 2015 switch (ireq->i_type) { 2016 case IEEE80211_IOC_HWMP_ROOTMODE: 2017 if (ireq->i_val < 0 || ireq->i_val > 3) 2018 return EINVAL; 2019 hs->hs_rootmode = ireq->i_val; 2020 hwmp_rootmode_setup(vap); 2021 break; 2022 case IEEE80211_IOC_HWMP_MAXHOPS: 2023 if (ireq->i_val <= 0 || ireq->i_val > 255) 2024 return EINVAL; 2025 hs->hs_maxhops = ireq->i_val; 2026 break; 2027 default: 2028 return ENOSYS; 2029 } 2030 return error; 2031} 2032IEEE80211_IOCTL_SET(hwmp, hwmp_ioctl_set80211); 2033