ieee80211_hwmp.c revision 246518
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 246518 2013-02-07 21:30:58Z 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 ieee80211vap *, 72 const uint8_t [IEEE80211_ADDR_LEN], 73 uint8_t *, size_t); 74static uint8_t * hwmp_add_meshpreq(uint8_t *, 75 const struct ieee80211_meshpreq_ie *); 76static uint8_t * hwmp_add_meshprep(uint8_t *, 77 const struct ieee80211_meshprep_ie *); 78static uint8_t * hwmp_add_meshperr(uint8_t *, 79 const struct ieee80211_meshperr_ie *); 80static uint8_t * hwmp_add_meshrann(uint8_t *, 81 const struct ieee80211_meshrann_ie *); 82static void hwmp_rootmode_setup(struct ieee80211vap *); 83static void hwmp_rootmode_cb(void *); 84static void hwmp_rootmode_rann_cb(void *); 85static void hwmp_recv_preq(struct ieee80211vap *, struct ieee80211_node *, 86 const struct ieee80211_frame *, 87 const struct ieee80211_meshpreq_ie *); 88static int hwmp_send_preq(struct ieee80211vap *, 89 const uint8_t [IEEE80211_ADDR_LEN], 90 struct ieee80211_meshpreq_ie *, 91 struct timeval *, struct timeval *); 92static void hwmp_recv_prep(struct ieee80211vap *, struct ieee80211_node *, 93 const struct ieee80211_frame *, 94 const struct ieee80211_meshprep_ie *); 95static int hwmp_send_prep(struct ieee80211vap *, 96 const uint8_t [IEEE80211_ADDR_LEN], 97 struct ieee80211_meshprep_ie *); 98static void hwmp_recv_perr(struct ieee80211vap *, struct ieee80211_node *, 99 const struct ieee80211_frame *, 100 const struct ieee80211_meshperr_ie *); 101static int hwmp_send_perr(struct ieee80211vap *, 102 const uint8_t [IEEE80211_ADDR_LEN], 103 struct ieee80211_meshperr_ie *); 104static void hwmp_senderror(struct ieee80211vap *, 105 const uint8_t [IEEE80211_ADDR_LEN], 106 struct ieee80211_mesh_route *, int); 107static void hwmp_recv_rann(struct ieee80211vap *, struct ieee80211_node *, 108 const struct ieee80211_frame *, 109 const struct ieee80211_meshrann_ie *); 110static int hwmp_send_rann(struct ieee80211vap *, 111 const uint8_t [IEEE80211_ADDR_LEN], 112 struct ieee80211_meshrann_ie *); 113static struct ieee80211_node * 114 hwmp_discover(struct ieee80211vap *, 115 const uint8_t [IEEE80211_ADDR_LEN], struct mbuf *); 116static void hwmp_peerdown(struct ieee80211_node *); 117 118static struct timeval ieee80211_hwmp_preqminint = { 0, 100000 }; 119static struct timeval ieee80211_hwmp_perrminint = { 0, 100000 }; 120 121/* unalligned little endian access */ 122#define LE_WRITE_2(p, v) do { \ 123 ((uint8_t *)(p))[0] = (v) & 0xff; \ 124 ((uint8_t *)(p))[1] = ((v) >> 8) & 0xff; \ 125} while (0) 126#define LE_WRITE_4(p, v) do { \ 127 ((uint8_t *)(p))[0] = (v) & 0xff; \ 128 ((uint8_t *)(p))[1] = ((v) >> 8) & 0xff; \ 129 ((uint8_t *)(p))[2] = ((v) >> 16) & 0xff; \ 130 ((uint8_t *)(p))[3] = ((v) >> 24) & 0xff; \ 131} while (0) 132 133 134/* NB: the Target Address set in a Proactive PREQ is the broadcast address. */ 135static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = 136 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 137 138typedef uint32_t ieee80211_hwmp_seq; 139#define HWMP_SEQ_LT(a, b) ((int32_t)((a)-(b)) < 0) 140#define HWMP_SEQ_LEQ(a, b) ((int32_t)((a)-(b)) <= 0) 141#define HWMP_SEQ_EQ(a, b) ((int32_t)((a)-(b)) == 0) 142#define HWMP_SEQ_GT(a, b) ((int32_t)((a)-(b)) > 0) 143#define HWMP_SEQ_GEQ(a, b) ((int32_t)((a)-(b)) >= 0) 144 145#define HWMP_SEQ_MAX(a, b) (a > b ? a : b) 146 147/* 148 * Private extension of ieee80211_mesh_route. 149 */ 150struct ieee80211_hwmp_route { 151 ieee80211_hwmp_seq hr_seq; /* last HWMP seq seen from dst*/ 152 ieee80211_hwmp_seq hr_preqid; /* last PREQ ID seen from dst */ 153 ieee80211_hwmp_seq hr_origseq; /* seq. no. on our latest PREQ*/ 154 struct timeval hr_lastpreq; /* last time we sent a PREQ */ 155 struct timeval hr_lastrootconf; /* last sent PREQ root conf */ 156 int hr_preqretries; /* number of discoveries */ 157 int hr_lastdiscovery; /* last discovery in ticks */ 158}; 159struct ieee80211_hwmp_state { 160 ieee80211_hwmp_seq hs_seq; /* next seq to be used */ 161 ieee80211_hwmp_seq hs_preqid; /* next PREQ ID to be used */ 162 int hs_rootmode; /* proactive HWMP */ 163 struct timeval hs_lastperr; /* last time we sent a PERR */ 164 struct callout hs_roottimer; 165 uint8_t hs_maxhops; /* max hop count */ 166}; 167 168static SYSCTL_NODE(_net_wlan, OID_AUTO, hwmp, CTLFLAG_RD, 0, 169 "IEEE 802.11s HWMP parameters"); 170static int ieee80211_hwmp_targetonly = 0; 171SYSCTL_INT(_net_wlan_hwmp, OID_AUTO, targetonly, CTLTYPE_INT | CTLFLAG_RW, 172 &ieee80211_hwmp_targetonly, 0, "Set TO bit on generated PREQs"); 173static int ieee80211_hwmp_pathtimeout = -1; 174SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, pathlifetime, CTLTYPE_INT | CTLFLAG_RW, 175 &ieee80211_hwmp_pathtimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 176 "path entry lifetime (ms)"); 177static int ieee80211_hwmp_maxpreq_retries = -1; 178SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, maxpreq_retries, CTLTYPE_INT | CTLFLAG_RW, 179 &ieee80211_hwmp_maxpreq_retries, 0, ieee80211_sysctl_msecs_ticks, "I", 180 "maximum number of preq retries"); 181static int ieee80211_hwmp_net_diameter_traversaltime = -1; 182SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, net_diameter_traversal_time, 183 CTLTYPE_INT | CTLFLAG_RW, &ieee80211_hwmp_net_diameter_traversaltime, 0, 184 ieee80211_sysctl_msecs_ticks, "I", 185 "estimate travelse time across the MBSS (ms)"); 186static int ieee80211_hwmp_roottimeout = -1; 187SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, roottimeout, CTLTYPE_INT | CTLFLAG_RW, 188 &ieee80211_hwmp_roottimeout, 0, ieee80211_sysctl_msecs_ticks, "I", 189 "root PREQ timeout (ms)"); 190static int ieee80211_hwmp_rootint = -1; 191SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, rootint, CTLTYPE_INT | CTLFLAG_RW, 192 &ieee80211_hwmp_rootint, 0, ieee80211_sysctl_msecs_ticks, "I", 193 "root interval (ms)"); 194static int ieee80211_hwmp_rannint = -1; 195SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, rannint, CTLTYPE_INT | CTLFLAG_RW, 196 &ieee80211_hwmp_rannint, 0, ieee80211_sysctl_msecs_ticks, "I", 197 "root announcement interval (ms)"); 198static struct timeval ieee80211_hwmp_rootconfint = { 0, 0 }; 199static int ieee80211_hwmp_rootconfint_internal = -1; 200SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, rootconfint, CTLTYPE_INT | CTLFLAG_RD, 201 &ieee80211_hwmp_rootconfint_internal, 0, ieee80211_sysctl_msecs_ticks, "I", 202 "root confirmation interval (ms) (read-only)"); 203 204#define IEEE80211_HWMP_DEFAULT_MAXHOPS 31 205 206static ieee80211_recv_action_func hwmp_recv_action_meshpath; 207 208static struct ieee80211_mesh_proto_path mesh_proto_hwmp = { 209 .mpp_descr = "HWMP", 210 .mpp_ie = IEEE80211_MESHCONF_PATH_HWMP, 211 .mpp_discover = hwmp_discover, 212 .mpp_peerdown = hwmp_peerdown, 213 .mpp_senderror = hwmp_senderror, 214 .mpp_vattach = hwmp_vattach, 215 .mpp_vdetach = hwmp_vdetach, 216 .mpp_newstate = hwmp_newstate, 217 .mpp_privlen = sizeof(struct ieee80211_hwmp_route), 218}; 219SYSCTL_PROC(_net_wlan_hwmp, OID_AUTO, inact, CTLTYPE_INT | CTLFLAG_RW, 220 &mesh_proto_hwmp.mpp_inact, 0, ieee80211_sysctl_msecs_ticks, "I", 221 "mesh route inactivity timeout (ms)"); 222 223 224static void 225ieee80211_hwmp_init(void) 226{ 227 /* Default values as per amendment */ 228 ieee80211_hwmp_pathtimeout = msecs_to_ticks(5*1000); 229 ieee80211_hwmp_roottimeout = msecs_to_ticks(5*1000); 230 ieee80211_hwmp_rootint = msecs_to_ticks(2*1000); 231 ieee80211_hwmp_rannint = msecs_to_ticks(1*1000); 232 ieee80211_hwmp_rootconfint_internal = msecs_to_ticks(2*1000); 233 ieee80211_hwmp_maxpreq_retries = 3; 234 /* 235 * (TU): A measurement of time equal to 1024 ��s, 236 * 500 TU is 512 ms. 237 */ 238 ieee80211_hwmp_net_diameter_traversaltime = msecs_to_ticks(512); 239 240 /* 241 * NB: I dont know how to make SYSCTL_PROC that calls ms to ticks 242 * and return a struct timeval... 243 */ 244 ieee80211_hwmp_rootconfint.tv_usec = 245 ieee80211_hwmp_rootconfint_internal * 1000; 246 247 /* 248 * Register action frame handler. 249 */ 250 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH, 251 IEEE80211_ACTION_MESH_HWMP, hwmp_recv_action_meshpath); 252 253 /* NB: default is 5 secs per spec */ 254 mesh_proto_hwmp.mpp_inact = msecs_to_ticks(5*1000); 255 256 /* 257 * Register HWMP. 258 */ 259 ieee80211_mesh_register_proto_path(&mesh_proto_hwmp); 260} 261SYSINIT(wlan_hwmp, SI_SUB_DRIVERS, SI_ORDER_SECOND, ieee80211_hwmp_init, NULL); 262 263void 264hwmp_vattach(struct ieee80211vap *vap) 265{ 266 struct ieee80211_hwmp_state *hs; 267 268 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, 269 ("not a mesh vap, opmode %d", vap->iv_opmode)); 270 271 hs = malloc(sizeof(struct ieee80211_hwmp_state), M_80211_VAP, 272 M_NOWAIT | M_ZERO); 273 if (hs == NULL) { 274 printf("%s: couldn't alloc HWMP state\n", __func__); 275 return; 276 } 277 hs->hs_maxhops = IEEE80211_HWMP_DEFAULT_MAXHOPS; 278 callout_init(&hs->hs_roottimer, CALLOUT_MPSAFE); 279 vap->iv_hwmp = hs; 280} 281 282void 283hwmp_vdetach(struct ieee80211vap *vap) 284{ 285 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 286 287 callout_drain(&hs->hs_roottimer); 288 free(vap->iv_hwmp, M_80211_VAP); 289 vap->iv_hwmp = NULL; 290} 291 292int 293hwmp_newstate(struct ieee80211vap *vap, enum ieee80211_state ostate, int arg) 294{ 295 enum ieee80211_state nstate = vap->iv_state; 296 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 297 298 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 299 __func__, ieee80211_state_name[ostate], 300 ieee80211_state_name[nstate], arg); 301 302 if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) 303 callout_drain(&hs->hs_roottimer); 304 if (nstate == IEEE80211_S_RUN) 305 hwmp_rootmode_setup(vap); 306 return 0; 307} 308 309/* 310 * Verify the length of an HWMP PREQ and return the number 311 * of destinations >= 1, if verification fails -1 is returned. 312 */ 313static int 314verify_mesh_preq_len(struct ieee80211vap *vap, 315 const struct ieee80211_frame *wh, const uint8_t *iefrm) 316{ 317 int alloc_sz = -1; 318 int ndest = -1; 319 if (iefrm[2] & IEEE80211_MESHPREQ_FLAGS_AE) { 320 /* Originator External Address present */ 321 alloc_sz = IEEE80211_MESHPREQ_BASE_SZ_AE; 322 ndest = iefrm[IEEE80211_MESHPREQ_TCNT_OFFSET_AE]; 323 } else { 324 /* w/o Originator External Address */ 325 alloc_sz = IEEE80211_MESHPREQ_BASE_SZ; 326 ndest = iefrm[IEEE80211_MESHPREQ_TCNT_OFFSET]; 327 } 328 alloc_sz += ndest * IEEE80211_MESHPREQ_TRGT_SZ; 329 330 if(iefrm[1] != (alloc_sz)) { 331 IEEE80211_DISCARD(vap, 332 IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP, 333 wh, NULL, "PREQ (AE=%s) with wrong len", 334 iefrm[2] & IEEE80211_MESHPREQ_FLAGS_AE ? "1" : "0"); 335 return (-1); 336 } 337 return ndest; 338} 339 340/* 341 * Verify the length of an HWMP PREP and returns 1 on success, 342 * otherwise -1. 343 */ 344static int 345verify_mesh_prep_len(struct ieee80211vap *vap, 346 const struct ieee80211_frame *wh, const uint8_t *iefrm) 347{ 348 int alloc_sz = -1; 349 if (iefrm[2] & IEEE80211_MESHPREP_FLAGS_AE) { 350 if (iefrm[1] == IEEE80211_MESHPREP_BASE_SZ_AE) 351 alloc_sz = IEEE80211_MESHPREP_BASE_SZ_AE; 352 } else if (iefrm[1] == IEEE80211_MESHPREP_BASE_SZ) 353 alloc_sz = IEEE80211_MESHPREP_BASE_SZ; 354 if(alloc_sz < 0) { 355 IEEE80211_DISCARD(vap, 356 IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP, 357 wh, NULL, "PREP (AE=%s) with wrong len", 358 iefrm[2] & IEEE80211_MESHPREP_FLAGS_AE ? "1" : "0"); 359 return (-1); 360 } 361 return (1); 362} 363 364/* 365 * Verify the length of an HWMP PERR and return the number 366 * of destinations >= 1, if verification fails -1 is returned. 367 */ 368static int 369verify_mesh_perr_len(struct ieee80211vap *vap, 370 const struct ieee80211_frame *wh, const uint8_t *iefrm) 371{ 372 int alloc_sz = -1; 373 const uint8_t *iefrm_t = iefrm; 374 uint8_t ndest = iefrm_t[IEEE80211_MESHPERR_NDEST_OFFSET]; 375 int i; 376 377 if(ndest > IEEE80211_MESHPERR_MAXDEST) { 378 IEEE80211_DISCARD(vap, 379 IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP, 380 wh, NULL, "PERR with wrong number of destionat (>19), %u", 381 ndest); 382 return (-1); 383 } 384 385 iefrm_t += IEEE80211_MESHPERR_NDEST_OFFSET + 1; /* flag is next field */ 386 /* We need to check each destionation flag to know size */ 387 for(i = 0; i<ndest; i++) { 388 if ((*iefrm_t) & IEEE80211_MESHPERR_FLAGS_AE) 389 iefrm_t += IEEE80211_MESHPERR_DEST_SZ_AE; 390 else 391 iefrm_t += IEEE80211_MESHPERR_DEST_SZ; 392 } 393 394 alloc_sz = (iefrm_t - iefrm) - 2; /* action + code */ 395 if(alloc_sz != iefrm[1]) { 396 IEEE80211_DISCARD(vap, 397 IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP, 398 wh, NULL, "%s", "PERR with wrong len"); 399 return (-1); 400 } 401 return ndest; 402} 403 404static int 405hwmp_recv_action_meshpath(struct ieee80211_node *ni, 406 const struct ieee80211_frame *wh, 407 const uint8_t *frm, const uint8_t *efrm) 408{ 409 struct ieee80211vap *vap = ni->ni_vap; 410 struct ieee80211_meshpreq_ie *preq; 411 struct ieee80211_meshprep_ie *prep; 412 struct ieee80211_meshperr_ie *perr; 413 struct ieee80211_meshrann_ie rann; 414 const uint8_t *iefrm = frm + 2; /* action + code */ 415 const uint8_t *iefrm_t = iefrm; /* temporary pointer */ 416 int ndest = -1; 417 int found = 0; 418 419 while (efrm - iefrm > 1) { 420 IEEE80211_VERIFY_LENGTH(efrm - iefrm, iefrm[1] + 2, return 0); 421 switch (*iefrm) { 422 case IEEE80211_ELEMID_MESHPREQ: 423 { 424 int i = 0; 425 426 iefrm_t = iefrm; 427 ndest = verify_mesh_preq_len(vap, wh, iefrm_t); 428 if (ndest < 0) { 429 vap->iv_stats.is_rx_mgtdiscard++; 430 break; 431 } 432 preq = malloc(sizeof(*preq) + 433 (ndest - 1) * sizeof(*preq->preq_targets), 434 M_80211_MESH_PREQ, M_NOWAIT | M_ZERO); 435 KASSERT(preq != NULL, ("preq == NULL")); 436 437 preq->preq_ie = *iefrm_t++; 438 preq->preq_len = *iefrm_t++; 439 preq->preq_flags = *iefrm_t++; 440 preq->preq_hopcount = *iefrm_t++; 441 preq->preq_ttl = *iefrm_t++; 442 preq->preq_id = LE_READ_4(iefrm_t); iefrm_t += 4; 443 IEEE80211_ADDR_COPY(preq->preq_origaddr, iefrm_t); 444 iefrm_t += 6; 445 preq->preq_origseq = LE_READ_4(iefrm_t); iefrm_t += 4; 446 /* NB: may have Originator Proxied Address */ 447 if (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE) { 448 IEEE80211_ADDR_COPY( 449 preq->preq_orig_ext_addr, iefrm_t); 450 iefrm_t += 6; 451 } 452 preq->preq_lifetime = LE_READ_4(iefrm_t); iefrm_t += 4; 453 preq->preq_metric = LE_READ_4(iefrm_t); iefrm_t += 4; 454 preq->preq_tcount = *iefrm_t++; 455 456 for (i = 0; i < preq->preq_tcount; i++) { 457 preq->preq_targets[i].target_flags = *iefrm_t++; 458 IEEE80211_ADDR_COPY( 459 preq->preq_targets[i].target_addr, iefrm_t); 460 iefrm_t += 6; 461 preq->preq_targets[i].target_seq = 462 LE_READ_4(iefrm_t); 463 iefrm_t += 4; 464 } 465 466 hwmp_recv_preq(vap, ni, wh, preq); 467 free(preq, M_80211_MESH_PREQ); 468 found++; 469 break; 470 } 471 case IEEE80211_ELEMID_MESHPREP: 472 { 473 iefrm_t = iefrm; 474 ndest = verify_mesh_prep_len(vap, wh, iefrm_t); 475 if (ndest < 0) { 476 vap->iv_stats.is_rx_mgtdiscard++; 477 break; 478 } 479 prep = malloc(sizeof(*prep), 480 M_80211_MESH_PREP, M_NOWAIT | M_ZERO); 481 KASSERT(prep != NULL, ("prep == NULL")); 482 483 prep->prep_ie = *iefrm_t++; 484 prep->prep_len = *iefrm_t++; 485 prep->prep_flags = *iefrm_t++; 486 prep->prep_hopcount = *iefrm_t++; 487 prep->prep_ttl = *iefrm_t++; 488 IEEE80211_ADDR_COPY(prep->prep_targetaddr, iefrm_t); 489 iefrm_t += 6; 490 prep->prep_targetseq = LE_READ_4(iefrm_t); iefrm_t += 4; 491 /* NB: May have Target Proxied Address */ 492 if (prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE) { 493 IEEE80211_ADDR_COPY( 494 prep->prep_target_ext_addr, iefrm_t); 495 iefrm_t += 6; 496 } 497 prep->prep_lifetime = LE_READ_4(iefrm_t); iefrm_t += 4; 498 prep->prep_metric = LE_READ_4(iefrm_t); iefrm_t += 4; 499 IEEE80211_ADDR_COPY(prep->prep_origaddr, iefrm_t); 500 iefrm_t += 6; 501 prep->prep_origseq = LE_READ_4(iefrm_t); iefrm_t += 4; 502 503 hwmp_recv_prep(vap, ni, wh, prep); 504 free(prep, M_80211_MESH_PREP); 505 found++; 506 break; 507 } 508 case IEEE80211_ELEMID_MESHPERR: 509 { 510 int i = 0; 511 512 iefrm_t = iefrm; 513 ndest = verify_mesh_perr_len(vap, wh, iefrm_t); 514 if (ndest < 0) { 515 vap->iv_stats.is_rx_mgtdiscard++; 516 break; 517 } 518 perr = malloc(sizeof(*perr) + 519 (ndest - 1) * sizeof(*perr->perr_dests), 520 M_80211_MESH_PERR, M_NOWAIT | M_ZERO); 521 KASSERT(perr != NULL, ("perr == NULL")); 522 523 perr->perr_ie = *iefrm_t++; 524 perr->perr_len = *iefrm_t++; 525 perr->perr_ttl = *iefrm_t++; 526 perr->perr_ndests = *iefrm_t++; 527 528 for (i = 0; i<perr->perr_ndests; i++) { 529 perr->perr_dests[i].dest_flags = *iefrm_t++; 530 IEEE80211_ADDR_COPY( 531 perr->perr_dests[i].dest_addr, iefrm_t); 532 iefrm_t += 6; 533 perr->perr_dests[i].dest_seq = LE_READ_4(iefrm_t); 534 iefrm_t += 4; 535 /* NB: May have Target Proxied Address */ 536 if (perr->perr_dests[i].dest_flags & 537 IEEE80211_MESHPERR_FLAGS_AE) { 538 IEEE80211_ADDR_COPY( 539 perr->perr_dests[i].dest_ext_addr, 540 iefrm_t); 541 iefrm_t += 6; 542 } 543 perr->perr_dests[i].dest_rcode = 544 LE_READ_2(iefrm_t); 545 iefrm_t += 2; 546 } 547 548 hwmp_recv_perr(vap, ni, wh, perr); 549 free(perr, M_80211_MESH_PERR); 550 found++; 551 break; 552 } 553 case IEEE80211_ELEMID_MESHRANN: 554 { 555 const struct ieee80211_meshrann_ie *mrann = 556 (const struct ieee80211_meshrann_ie *) iefrm; 557 if (mrann->rann_len != 558 sizeof(struct ieee80211_meshrann_ie) - 2) { 559 IEEE80211_DISCARD(vap, 560 IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP, 561 wh, NULL, "%s", "RAN with wrong len"); 562 vap->iv_stats.is_rx_mgtdiscard++; 563 return 1; 564 } 565 memcpy(&rann, mrann, sizeof(rann)); 566 rann.rann_seq = LE_READ_4(&mrann->rann_seq); 567 rann.rann_interval = LE_READ_4(&mrann->rann_interval); 568 rann.rann_metric = LE_READ_4(&mrann->rann_metric); 569 hwmp_recv_rann(vap, ni, wh, &rann); 570 found++; 571 break; 572 } 573 } 574 iefrm += iefrm[1] + 2; 575 } 576 if (!found) { 577 IEEE80211_DISCARD(vap, 578 IEEE80211_MSG_ACTION | IEEE80211_MSG_HWMP, 579 wh, NULL, "%s", "PATH SEL action without IE"); 580 vap->iv_stats.is_rx_mgtdiscard++; 581 } 582 return 0; 583} 584 585static int 586hwmp_send_action(struct ieee80211vap *vap, 587 const uint8_t da[IEEE80211_ADDR_LEN], 588 uint8_t *ie, size_t len) 589{ 590 struct ieee80211_node *ni; 591 struct ieee80211com *ic; 592 struct ieee80211_bpf_params params; 593 struct mbuf *m; 594 uint8_t *frm; 595 596 if (IEEE80211_IS_MULTICAST(da)) { 597 ni = ieee80211_ref_node(vap->iv_bss); 598#ifdef IEEE80211_DEBUG_REFCNT 599 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 600 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 601 __func__, __LINE__, 602 ni, ether_sprintf(ni->ni_macaddr), 603 ieee80211_node_refcnt(ni)+1); 604#endif 605 ieee80211_ref_node(ni); 606 } 607 else 608 ni = ieee80211_mesh_find_txnode(vap, da); 609 610 if (vap->iv_state == IEEE80211_S_CAC) { 611 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, 612 "block %s frame in CAC state", "HWMP action"); 613 vap->iv_stats.is_tx_badstate++; 614 return EIO; /* XXX */ 615 } 616 617 KASSERT(ni != NULL, ("null node")); 618 ic = ni->ni_ic; 619 620 m = ieee80211_getmgtframe(&frm, 621 ic->ic_headroom + sizeof(struct ieee80211_frame), 622 sizeof(struct ieee80211_action) + len 623 ); 624 if (m == NULL) { 625 ieee80211_free_node(ni); 626 vap->iv_stats.is_tx_nobuf++; 627 return ENOMEM; 628 } 629 *frm++ = IEEE80211_ACTION_CAT_MESH; 630 *frm++ = IEEE80211_ACTION_MESH_HWMP; 631 switch (*ie) { 632 case IEEE80211_ELEMID_MESHPREQ: 633 frm = hwmp_add_meshpreq(frm, 634 (struct ieee80211_meshpreq_ie *)ie); 635 break; 636 case IEEE80211_ELEMID_MESHPREP: 637 frm = hwmp_add_meshprep(frm, 638 (struct ieee80211_meshprep_ie *)ie); 639 break; 640 case IEEE80211_ELEMID_MESHPERR: 641 frm = hwmp_add_meshperr(frm, 642 (struct ieee80211_meshperr_ie *)ie); 643 break; 644 case IEEE80211_ELEMID_MESHRANN: 645 frm = hwmp_add_meshrann(frm, 646 (struct ieee80211_meshrann_ie *)ie); 647 break; 648 } 649 650 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 651 M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT); 652 if (m == NULL) { 653 ieee80211_free_node(ni); 654 vap->iv_stats.is_tx_nobuf++; 655 return ENOMEM; 656 } 657 ieee80211_send_setup(ni, m, 658 IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, 659 IEEE80211_NONQOS_TID, vap->iv_myaddr, da, vap->iv_myaddr); 660 661 m->m_flags |= M_ENCAP; /* mark encapsulated */ 662 IEEE80211_NODE_STAT(ni, tx_mgmt); 663 664 memset(¶ms, 0, sizeof(params)); 665 params.ibp_pri = WME_AC_VO; 666 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 667 if (IEEE80211_IS_MULTICAST(da)) 668 params.ibp_try0 = 1; 669 else 670 params.ibp_try0 = ni->ni_txparms->maxretry; 671 params.ibp_power = ni->ni_txpower; 672 return ic->ic_raw_xmit(ni, m, ¶ms); 673} 674 675#define ADDSHORT(frm, v) do { \ 676 frm[0] = (v) & 0xff; \ 677 frm[1] = (v) >> 8; \ 678 frm += 2; \ 679} while (0) 680#define ADDWORD(frm, v) do { \ 681 LE_WRITE_4(frm, v); \ 682 frm += 4; \ 683} while (0) 684/* 685 * Add a Mesh Path Request IE to a frame. 686 */ 687#define PREQ_TFLAGS(n) preq->preq_targets[n].target_flags 688#define PREQ_TADDR(n) preq->preq_targets[n].target_addr 689#define PREQ_TSEQ(n) preq->preq_targets[n].target_seq 690static uint8_t * 691hwmp_add_meshpreq(uint8_t *frm, const struct ieee80211_meshpreq_ie *preq) 692{ 693 int i; 694 695 *frm++ = IEEE80211_ELEMID_MESHPREQ; 696 *frm++ = preq->preq_len; /* len already calculated */ 697 *frm++ = preq->preq_flags; 698 *frm++ = preq->preq_hopcount; 699 *frm++ = preq->preq_ttl; 700 ADDWORD(frm, preq->preq_id); 701 IEEE80211_ADDR_COPY(frm, preq->preq_origaddr); frm += 6; 702 ADDWORD(frm, preq->preq_origseq); 703 if (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE) { 704 IEEE80211_ADDR_COPY(frm, preq->preq_orig_ext_addr); 705 frm += 6; 706 } 707 ADDWORD(frm, preq->preq_lifetime); 708 ADDWORD(frm, preq->preq_metric); 709 *frm++ = preq->preq_tcount; 710 for (i = 0; i < preq->preq_tcount; i++) { 711 *frm++ = PREQ_TFLAGS(i); 712 IEEE80211_ADDR_COPY(frm, PREQ_TADDR(i)); 713 frm += 6; 714 ADDWORD(frm, PREQ_TSEQ(i)); 715 } 716 return frm; 717} 718#undef PREQ_TFLAGS 719#undef PREQ_TADDR 720#undef PREQ_TSEQ 721 722/* 723 * Add a Mesh Path Reply IE to a frame. 724 */ 725static uint8_t * 726hwmp_add_meshprep(uint8_t *frm, const struct ieee80211_meshprep_ie *prep) 727{ 728 *frm++ = IEEE80211_ELEMID_MESHPREP; 729 *frm++ = prep->prep_len; /* len already calculated */ 730 *frm++ = prep->prep_flags; 731 *frm++ = prep->prep_hopcount; 732 *frm++ = prep->prep_ttl; 733 IEEE80211_ADDR_COPY(frm, prep->prep_targetaddr); frm += 6; 734 ADDWORD(frm, prep->prep_targetseq); 735 if (prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE) { 736 IEEE80211_ADDR_COPY(frm, prep->prep_target_ext_addr); 737 frm += 6; 738 } 739 ADDWORD(frm, prep->prep_lifetime); 740 ADDWORD(frm, prep->prep_metric); 741 IEEE80211_ADDR_COPY(frm, prep->prep_origaddr); frm += 6; 742 ADDWORD(frm, prep->prep_origseq); 743 return frm; 744} 745 746/* 747 * Add a Mesh Path Error IE to a frame. 748 */ 749#define PERR_DFLAGS(n) perr->perr_dests[n].dest_flags 750#define PERR_DADDR(n) perr->perr_dests[n].dest_addr 751#define PERR_DSEQ(n) perr->perr_dests[n].dest_seq 752#define PERR_EXTADDR(n) perr->perr_dests[n].dest_ext_addr 753#define PERR_DRCODE(n) perr->perr_dests[n].dest_rcode 754static uint8_t * 755hwmp_add_meshperr(uint8_t *frm, const struct ieee80211_meshperr_ie *perr) 756{ 757 int i; 758 759 *frm++ = IEEE80211_ELEMID_MESHPERR; 760 *frm++ = perr->perr_len; /* len already calculated */ 761 *frm++ = perr->perr_ttl; 762 *frm++ = perr->perr_ndests; 763 for (i = 0; i < perr->perr_ndests; i++) { 764 *frm++ = PERR_DFLAGS(i); 765 IEEE80211_ADDR_COPY(frm, PERR_DADDR(i)); 766 frm += 6; 767 ADDWORD(frm, PERR_DSEQ(i)); 768 if (PERR_DFLAGS(i) & IEEE80211_MESHPERR_FLAGS_AE) { 769 IEEE80211_ADDR_COPY(frm, PERR_EXTADDR(i)); 770 frm += 6; 771 } 772 ADDSHORT(frm, PERR_DRCODE(i)); 773 } 774 return frm; 775} 776#undef PERR_DFLAGS 777#undef PERR_DADDR 778#undef PERR_DSEQ 779#undef PERR_EXTADDR 780#undef PERR_DRCODE 781 782/* 783 * Add a Root Annoucement IE to a frame. 784 */ 785static uint8_t * 786hwmp_add_meshrann(uint8_t *frm, const struct ieee80211_meshrann_ie *rann) 787{ 788 *frm++ = IEEE80211_ELEMID_MESHRANN; 789 *frm++ = rann->rann_len; 790 *frm++ = rann->rann_flags; 791 *frm++ = rann->rann_hopcount; 792 *frm++ = rann->rann_ttl; 793 IEEE80211_ADDR_COPY(frm, rann->rann_addr); frm += 6; 794 ADDWORD(frm, rann->rann_seq); 795 ADDWORD(frm, rann->rann_interval); 796 ADDWORD(frm, rann->rann_metric); 797 return frm; 798} 799 800static void 801hwmp_rootmode_setup(struct ieee80211vap *vap) 802{ 803 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 804 struct ieee80211_mesh_state *ms = vap->iv_mesh; 805 806 switch (hs->hs_rootmode) { 807 case IEEE80211_HWMP_ROOTMODE_DISABLED: 808 callout_drain(&hs->hs_roottimer); 809 ms->ms_flags &= ~IEEE80211_MESHFLAGS_ROOT; 810 break; 811 case IEEE80211_HWMP_ROOTMODE_NORMAL: 812 case IEEE80211_HWMP_ROOTMODE_PROACTIVE: 813 callout_reset(&hs->hs_roottimer, ieee80211_hwmp_rootint, 814 hwmp_rootmode_cb, vap); 815 ms->ms_flags |= IEEE80211_MESHFLAGS_ROOT; 816 break; 817 case IEEE80211_HWMP_ROOTMODE_RANN: 818 callout_reset(&hs->hs_roottimer, ieee80211_hwmp_rannint, 819 hwmp_rootmode_rann_cb, vap); 820 ms->ms_flags |= IEEE80211_MESHFLAGS_ROOT; 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 = 0; 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 /* NB: we enforce rate check ourself */ 862 hwmp_send_preq(vap, broadcastaddr, &preq, NULL, NULL); 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, 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 uint32_t metric = 0; 916 917 /* 918 * Ignore PREQs from us. Could happen because someone forward it 919 * back to us. 920 */ 921 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, preq->preq_origaddr)) 922 return; 923 924 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 925 "received PREQ, orig %6D, targ(0) %6D", preq->preq_origaddr, ":", 926 PREQ_TADDR(0), ":"); 927 928 /* 929 * Acceptance criteria: (if the PREQ is not for us or not broadcast, 930 * or an external mac address not proxied by us), 931 * AND forwarding is disabled, discard this PREQ. 932 */ 933 rttarg = ieee80211_mesh_rt_find(vap, PREQ_TADDR(0)); 934 if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD) && 935 (!IEEE80211_ADDR_EQ(vap->iv_myaddr, PREQ_TADDR(0)) || 936 !IEEE80211_IS_MULTICAST(PREQ_TADDR(0)) || 937 (rttarg != NULL && 938 rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && 939 IEEE80211_ADDR_EQ(vap->iv_myaddr, rttarg->rt_mesh_gate)))) { 940 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_HWMP, 941 preq->preq_origaddr, NULL, "%s", "not accepting PREQ"); 942 return; 943 } 944 /* 945 * Acceptance criteria: if unicast addressed 946 * AND no valid forwarding for Target of PREQ, discard this PREQ. 947 */ 948 if(rttarg != NULL) 949 hrtarg = IEEE80211_MESH_ROUTE_PRIV(rttarg, 950 struct ieee80211_hwmp_route); 951 /* Address mode: ucast */ 952 if(preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AM && 953 rttarg == NULL && 954 !IEEE80211_ADDR_EQ(vap->iv_myaddr, PREQ_TADDR(0))) { 955 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_HWMP, 956 preq->preq_origaddr, NULL, 957 "unicast addressed PREQ of unknown target %6D", 958 PREQ_TADDR(0), ":"); 959 return; 960 } 961 962 /* PREQ ACCEPTED */ 963 964 rtorig = ieee80211_mesh_rt_find(vap, preq->preq_origaddr); 965 if (rtorig == NULL) { 966 rtorig = ieee80211_mesh_rt_add(vap, preq->preq_origaddr); 967 if (rtorig == NULL) { 968 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 969 "unable to add orig path to %6D", 970 preq->preq_origaddr, ":"); 971 vap->iv_stats.is_mesh_rtaddfailed++; 972 return; 973 } 974 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 975 "adding originator %6D", preq->preq_origaddr, ":"); 976 } 977 hrorig = IEEE80211_MESH_ROUTE_PRIV(rtorig, struct ieee80211_hwmp_route); 978 979 /* record last seen preqid */ 980 preqid = hrorig->hr_preqid; 981 hrorig->hr_preqid = HWMP_SEQ_MAX(hrorig->hr_preqid, preq->preq_id); 982 983 /* Data creation and update of forwarding information 984 * according to Table 11C-8 for originator mesh STA. 985 */ 986 metric = preq->preq_metric + ms->ms_pmetric->mpm_metric(ni); 987 if (HWMP_SEQ_GT(preq->preq_origseq, hrorig->hr_seq) || 988 (HWMP_SEQ_EQ(preq->preq_origseq, hrorig->hr_seq) && 989 metric < rtorig->rt_metric)) { 990 hrorig->hr_seq = preq->preq_origseq; 991 IEEE80211_ADDR_COPY(rtorig->rt_nexthop, wh->i_addr2); 992 rtorig->rt_metric = metric; 993 rtorig->rt_nhops = preq->preq_hopcount + 1; 994 ieee80211_mesh_rt_update(rtorig, preq->preq_lifetime); 995 /* Path to orig is valid now. 996 * NB: we know it can't be Proxy, and if it is GATE 997 * it will be marked below. 998 */ 999 rtorig->rt_flags = IEEE80211_MESHRT_FLAGS_VALID; 1000 } else if ((hrtarg != NULL && 1001 !HWMP_SEQ_EQ(hrtarg->hr_seq, PREQ_TSEQ(0))) || 1002 (rtorig->rt_flags & IEEE80211_MESHRT_FLAGS_VALID && 1003 preqid >= preq->preq_id)) { 1004 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1005 "discard PREQ from %6D, old seqno %u <= %u," 1006 " or old preqid %u < %u", 1007 preq->preq_origaddr, ":", 1008 preq->preq_origseq, hrorig->hr_seq, 1009 preq->preq_id, preqid); 1010 return; 1011 } 1012 1013 /* 1014 * Forwarding information for transmitter mesh STA 1015 * [OPTIONAL: if metric improved] 1016 */ 1017 1018 /* 1019 * Check if the PREQ is addressed to us. 1020 * or a Proxy currently gated by us. 1021 */ 1022 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, PREQ_TADDR(0)) || 1023 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && 1024 rttarg != NULL && 1025 IEEE80211_ADDR_EQ(vap->iv_myaddr, rttarg->rt_mesh_gate) && 1026 rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && 1027 rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_VALID)) { 1028 /* 1029 * When we are the target we shall update our own HWMP seq 1030 * number with max of (current and preq->seq) + 1 1031 */ 1032 hs->hs_seq = HWMP_SEQ_MAX(hs->hs_seq, PREQ_TSEQ(0)) + 1; 1033 1034 prep.prep_flags = 0; 1035 prep.prep_hopcount = 0; 1036 prep.prep_metric = IEEE80211_MESHLMETRIC_INITIALVAL; 1037 IEEE80211_ADDR_COPY(prep.prep_targetaddr, vap->iv_myaddr); 1038 if (rttarg != NULL && /* if NULL it means we are the target */ 1039 rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { 1040 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1041 "reply for proxy %6D", rttarg->rt_dest, ":"); 1042 prep.prep_flags |= IEEE80211_MESHPREP_FLAGS_AE; 1043 IEEE80211_ADDR_COPY(prep.prep_target_ext_addr, 1044 rttarg->rt_dest); 1045 /* update proxy seqno to HWMP seqno */ 1046 rttarg->rt_ext_seq = hs->hs_seq; 1047 prep.prep_hopcount = rttarg->rt_nhops; 1048 prep.prep_metric = rttarg->rt_metric; 1049 IEEE80211_ADDR_COPY(prep.prep_targetaddr, rttarg->rt_mesh_gate); 1050 } 1051 /* 1052 * Build and send a PREP frame. 1053 */ 1054 prep.prep_ttl = ms->ms_ttl; 1055 prep.prep_targetseq = hs->hs_seq; 1056 prep.prep_lifetime = preq->preq_lifetime; 1057 IEEE80211_ADDR_COPY(prep.prep_origaddr, preq->preq_origaddr); 1058 prep.prep_origseq = preq->preq_origseq; 1059 1060 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1061 "reply to %6D", preq->preq_origaddr, ":"); 1062 hwmp_send_prep(vap, wh->i_addr2, &prep); 1063 return; 1064 } 1065 /* we may update our proxy information for the orig external */ 1066 else if (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE) { 1067 rtorig_ext = 1068 ieee80211_mesh_rt_find(vap, preq->preq_orig_ext_addr); 1069 if (rtorig_ext == NULL) { 1070 rtorig_ext = ieee80211_mesh_rt_add(vap, 1071 preq->preq_orig_ext_addr); 1072 if (rtorig_ext == NULL) { 1073 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1074 "unable to add orig ext proxy to %6D", 1075 preq->preq_orig_ext_addr, ":"); 1076 vap->iv_stats.is_mesh_rtaddfailed++; 1077 return; 1078 } 1079 IEEE80211_ADDR_COPY(rtorig_ext->rt_mesh_gate, 1080 preq->preq_origaddr); 1081 } 1082 rtorig_ext->rt_ext_seq = preq->preq_origseq; 1083 ieee80211_mesh_rt_update(rtorig_ext, preq->preq_lifetime); 1084 } 1085 /* 1086 * Proactive PREQ: reply with a proactive PREP to the 1087 * root STA if requested. 1088 */ 1089 if (IEEE80211_ADDR_EQ(PREQ_TADDR(0), broadcastaddr) && 1090 (PREQ_TFLAGS(0) & IEEE80211_MESHPREQ_TFLAGS_TO)) { 1091 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1092 "root mesh station @ %6D", preq->preq_origaddr, ":"); 1093 1094 /* Check if root is a mesh gate, mark it */ 1095 if (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_GATE) { 1096 struct ieee80211_mesh_gate_route *gr; 1097 1098 rtorig->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 1099 gr = ieee80211_mesh_mark_gate(vap, preq->preq_origaddr, 1100 rtorig); 1101 gr->gr_lastseq = 0; /* NOT GANN */ 1102 } 1103 1104 /* 1105 * Reply with a PREP if we don't have a path to the root 1106 * or if the root sent us a proactive PREQ. 1107 */ 1108 if ((rtorig->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 || 1109 (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_PP)) { 1110 prep.prep_flags = 0; 1111 prep.prep_hopcount = 0; 1112 prep.prep_ttl = ms->ms_ttl; 1113 IEEE80211_ADDR_COPY(prep.prep_origaddr, 1114 preq->preq_origaddr); 1115 prep.prep_origseq = preq->preq_origseq; 1116 prep.prep_lifetime = preq->preq_lifetime; 1117 prep.prep_metric = IEEE80211_MESHLMETRIC_INITIALVAL; 1118 IEEE80211_ADDR_COPY(prep.prep_targetaddr, 1119 vap->iv_myaddr); 1120 prep.prep_targetseq = ++hs->hs_seq; 1121 hwmp_send_prep(vap, rtorig->rt_nexthop, &prep); 1122 } 1123 } 1124 1125 /* 1126 * Forwarding and Intermediate reply for PREQs with 1 target. 1127 */ 1128 if ((preq->preq_tcount == 1) && (preq->preq_ttl > 1) && 1129 (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { 1130 struct ieee80211_meshpreq_ie ppreq; /* propagated PREQ */ 1131 1132 memcpy(&ppreq, preq, sizeof(ppreq)); 1133 1134 /* 1135 * We have a valid route to this node. 1136 * NB: if target is proxy dont reply. 1137 */ 1138 if (rttarg != NULL && 1139 rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_VALID && 1140 !(rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) { 1141 /* 1142 * Check if we can send an intermediate Path Reply, 1143 * i.e., Target Only bit is not set and target is not 1144 * the MAC broadcast address. 1145 */ 1146 if (!(PREQ_TFLAGS(0) & IEEE80211_MESHPREQ_TFLAGS_TO) && 1147 !IEEE80211_ADDR_EQ(PREQ_TADDR(0), broadcastaddr)) { 1148 struct ieee80211_meshprep_ie prep; 1149 1150 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1151 "intermediate reply for PREQ from %6D", 1152 preq->preq_origaddr, ":"); 1153 prep.prep_flags = 0; 1154 prep.prep_hopcount = rttarg->rt_nhops; 1155 prep.prep_ttl = ms->ms_ttl; 1156 IEEE80211_ADDR_COPY(&prep.prep_targetaddr, 1157 PREQ_TADDR(0)); 1158 prep.prep_targetseq = hrtarg->hr_seq; 1159 prep.prep_lifetime = preq->preq_lifetime; 1160 prep.prep_metric =rttarg->rt_metric; 1161 IEEE80211_ADDR_COPY(&prep.prep_origaddr, 1162 preq->preq_origaddr); 1163 prep.prep_origseq = hrorig->hr_seq; 1164 hwmp_send_prep(vap, rtorig->rt_nexthop, &prep); 1165 1166 /* 1167 * Set TO and unset RF bits because we have 1168 * sent a PREP. 1169 */ 1170 ppreq.preq_targets[0].target_flags |= 1171 IEEE80211_MESHPREQ_TFLAGS_TO; 1172 } 1173 } 1174 1175 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1176 "forward PREQ from %6D", 1177 preq->preq_origaddr, ":"); 1178 ppreq.preq_hopcount += 1; 1179 ppreq.preq_ttl -= 1; 1180 ppreq.preq_metric += ms->ms_pmetric->mpm_metric(ni); 1181 1182 /* don't do PREQ ratecheck when we propagate */ 1183 hwmp_send_preq(vap, broadcastaddr, &ppreq, NULL, NULL); 1184 } 1185} 1186#undef PREQ_TFLAGS 1187#undef PREQ_TADDR 1188#undef PREQ_TSEQ 1189 1190static int 1191hwmp_send_preq(struct ieee80211vap *vap, 1192 const uint8_t da[IEEE80211_ADDR_LEN], 1193 struct ieee80211_meshpreq_ie *preq, 1194 struct timeval *last, struct timeval *minint) 1195{ 1196 1197 /* 1198 * Enforce PREQ interval. 1199 * NB: Proactive ROOT PREQs rate is handled by cb task. 1200 */ 1201 if (last != NULL && minint != NULL) { 1202 if (ratecheck(last, minint) == 0) 1203 return EALREADY; /* XXX: we should postpone */ 1204 getmicrouptime(last); 1205 } 1206 1207 /* 1208 * mesh preq action frame format 1209 * [6] da 1210 * [6] sa 1211 * [6] addr3 = sa 1212 * [1] action 1213 * [1] category 1214 * [tlv] mesh path request 1215 */ 1216 preq->preq_ie = IEEE80211_ELEMID_MESHPREQ; 1217 preq->preq_len = (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE ? 1218 IEEE80211_MESHPREQ_BASE_SZ_AE : IEEE80211_MESHPREQ_BASE_SZ) + 1219 preq->preq_tcount * IEEE80211_MESHPREQ_TRGT_SZ; 1220 return hwmp_send_action(vap, da, (uint8_t *)preq, preq->preq_len+2); 1221} 1222 1223static void 1224hwmp_recv_prep(struct ieee80211vap *vap, struct ieee80211_node *ni, 1225 const struct ieee80211_frame *wh, const struct ieee80211_meshprep_ie *prep) 1226{ 1227#define IS_PROXY(rt) (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) 1228#define PROXIED_BY_US(rt) \ 1229 (IEEE80211_ADDR_EQ(vap->iv_myaddr, rt->rt_mesh_gate)) 1230 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1231 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 1232 struct ieee80211_mesh_route *rt = NULL; 1233 struct ieee80211_mesh_route *rtorig = NULL; 1234 struct ieee80211_mesh_route *rtext = NULL; 1235 struct ieee80211_hwmp_route *hr; 1236 struct ieee80211com *ic = vap->iv_ic; 1237 struct ifnet *ifp = vap->iv_ifp; 1238 struct mbuf *m, *next; 1239 uint32_t metric = 0; 1240 const uint8_t *addr; 1241 int is_encap; 1242 struct ieee80211_node *ni_encap; 1243 1244 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1245 "received PREP, orig %6D, targ %6D", prep->prep_origaddr, ":", 1246 prep->prep_targetaddr, ":"); 1247 1248 /* 1249 * Acceptance criteria: (If the corresponding PREP was not generated 1250 * by us OR not generated by an external mac that is not proxied by us) 1251 * AND forwarding is disabled, discard this PREP. 1252 */ 1253 rtorig = ieee80211_mesh_rt_find(vap, prep->prep_origaddr); 1254 if ((!IEEE80211_ADDR_EQ(vap->iv_myaddr, prep->prep_origaddr) || 1255 (rtorig != NULL && IS_PROXY(rtorig) && !PROXIED_BY_US(rtorig))) && 1256 !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)){ 1257 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1258 "discard PREP, orig(%6D) not proxied or generated by us", 1259 prep->prep_origaddr, ":"); 1260 return; 1261 } 1262 1263 /* PREP ACCEPTED */ 1264 1265 /* 1266 * If accepted shall create or update the active forwarding information 1267 * it maintains for the target mesh STA of the PREP (according to the 1268 * rules defined in 13.10.8.4). If the conditions for creating or 1269 * updating the forwarding information have not been met in those 1270 * rules, no further steps are applied to the PREP. 1271 * [OPTIONAL]: update forwarding information to TA if metric improves. 1272 */ 1273 rt = ieee80211_mesh_rt_find(vap, prep->prep_targetaddr); 1274 if (rt == NULL) { 1275 rt = ieee80211_mesh_rt_add(vap, prep->prep_targetaddr); 1276 if (rt == NULL) { 1277 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1278 "unable to add PREP path to %6D", 1279 prep->prep_targetaddr, ":"); 1280 vap->iv_stats.is_mesh_rtaddfailed++; 1281 return; 1282 } 1283 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1284 "adding target %6D", prep->prep_targetaddr, ":"); 1285 } 1286 hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); 1287 /* update path metric */ 1288 metric = prep->prep_metric + ms->ms_pmetric->mpm_metric(ni); 1289 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID)) { 1290 if (HWMP_SEQ_LT(prep->prep_targetseq, hr->hr_seq)) { 1291 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1292 "discard PREP from %6D, old seq no %u < %u", 1293 prep->prep_targetaddr, ":", 1294 prep->prep_targetseq, hr->hr_seq); 1295 return; 1296 } else if (HWMP_SEQ_LEQ(prep->prep_targetseq, hr->hr_seq) && 1297 metric > rt->rt_metric) { 1298 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1299 "discard PREP from %6D, new metric %u > %u", 1300 prep->prep_targetaddr, ":", 1301 metric, rt->rt_metric); 1302 return; 1303 } 1304 } 1305 1306 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1307 "%s path to %6D, hopcount %d:%d metric %d:%d", 1308 rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID ? 1309 "prefer" : "update", 1310 prep->prep_targetaddr, ":", 1311 rt->rt_nhops, prep->prep_hopcount + 1, 1312 rt->rt_metric, metric); 1313 1314 hr->hr_seq = prep->prep_targetseq; 1315 hr->hr_preqretries = 0; 1316 IEEE80211_ADDR_COPY(rt->rt_nexthop, ni->ni_macaddr); 1317 rt->rt_metric = metric; 1318 rt->rt_nhops = prep->prep_hopcount + 1; 1319 ieee80211_mesh_rt_update(rt, prep->prep_lifetime); 1320 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) { 1321 /* discovery complete */ 1322 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_DISCOVER; 1323 } 1324 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID; /* mark valid */ 1325 1326 /* 1327 * If it's NOT for us, propagate the PREP 1328 */ 1329 if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, prep->prep_origaddr) && 1330 prep->prep_ttl > 1 && 1331 prep->prep_hopcount < hs->hs_maxhops) { 1332 struct ieee80211_meshprep_ie pprep; /* propagated PREP */ 1333 /* 1334 * NB: We should already have setup the path to orig 1335 * mesh STA when we propagated PREQ to target mesh STA, 1336 * no PREP is generated without a corresponding PREQ. 1337 * XXX: for now just ignore. 1338 */ 1339 if (rtorig == NULL) { 1340 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1341 "received PREP for an unknown orig(%6D)", 1342 prep->prep_origaddr, ":"); 1343 return; 1344 } 1345 1346 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1347 "propagate PREP from %6D", 1348 prep->prep_targetaddr, ":"); 1349 1350 memcpy(&pprep, prep, sizeof(pprep)); 1351 pprep.prep_hopcount += 1; 1352 pprep.prep_ttl -= 1; 1353 pprep.prep_metric += ms->ms_pmetric->mpm_metric(ni); 1354 hwmp_send_prep(vap, rtorig->rt_nexthop, &pprep); 1355 1356 /* precursor list for the Target Mesh STA Address is updated */ 1357 } 1358 1359 /* 1360 * Check if we received a PREP w/ AE and store target external address. 1361 * We may store target external address if recevied PREP w/ AE 1362 * and we are not final destination 1363 */ 1364 if (prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE) { 1365 rtext = ieee80211_mesh_rt_find(vap, 1366 prep->prep_target_ext_addr); 1367 if (rtext == NULL) { 1368 rtext = ieee80211_mesh_rt_add(vap, 1369 prep->prep_target_ext_addr); 1370 if (rtext == NULL) { 1371 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1372 "unable to add PREP path to proxy %6D", 1373 prep->prep_targetaddr, ":"); 1374 vap->iv_stats.is_mesh_rtaddfailed++; 1375 return; 1376 } 1377 } 1378 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1379 "%s path to %6D, hopcount %d:%d metric %d:%d", 1380 rtext->rt_flags & IEEE80211_MESHRT_FLAGS_VALID ? 1381 "prefer" : "update", 1382 prep->prep_target_ext_addr, ":", 1383 rtext->rt_nhops, prep->prep_hopcount + 1, 1384 rtext->rt_metric, metric); 1385 1386 rtext->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | 1387 IEEE80211_MESHRT_FLAGS_VALID; 1388 IEEE80211_ADDR_COPY(rtext->rt_dest, 1389 prep->prep_target_ext_addr); 1390 IEEE80211_ADDR_COPY(rtext->rt_mesh_gate, 1391 prep->prep_targetaddr); 1392 IEEE80211_ADDR_COPY(rtext->rt_nexthop, wh->i_addr2); 1393 rtext->rt_metric = metric; 1394 rtext->rt_lifetime = prep->prep_lifetime; 1395 rtext->rt_nhops = prep->prep_hopcount + 1; 1396 rtext->rt_ext_seq = prep->prep_origseq; /* new proxy seq */ 1397 /* 1398 * XXX: proxy entries have no HWMP priv data, 1399 * nullify them to be sure? 1400 */ 1401 } 1402 /* 1403 * Check for frames queued awaiting path discovery. 1404 * XXX probably can tell exactly and avoid remove call 1405 * NB: hash may have false matches, if so they will get 1406 * stuck back on the stageq because there won't be 1407 * a path. 1408 */ 1409 addr = prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE ? 1410 prep->prep_target_ext_addr : prep->prep_targetaddr; 1411 m = ieee80211_ageq_remove(&ic->ic_stageq, 1412 (struct ieee80211_node *)(uintptr_t) 1413 ieee80211_mac_hash(ic, addr)); /* either dest or ext_dest */ 1414 for (; m != NULL; m = next) { 1415 is_encap = !! (m->m_flags & M_ENCAP); 1416 ni_encap = (struct ieee80211_node *) m->m_pkthdr.rcvif; 1417 next = m->m_nextpkt; 1418 m->m_nextpkt = NULL; 1419 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1420 "flush queued frame %p len %d", m, m->m_pkthdr.len); 1421 1422 /* 1423 * If the mbuf has M_ENCAP set, ensure we free it. 1424 * Note that after if_transmit() is called, m is invalid. 1425 */ 1426 if (ifp->if_transmit(ifp, m) != 0) { 1427 if (is_encap) 1428 ieee80211_free_node(ni_encap); 1429 } 1430 } 1431#undef IS_PROXY 1432#undef PROXIED_BY_US 1433} 1434 1435static int 1436hwmp_send_prep(struct ieee80211vap *vap, 1437 const uint8_t da[IEEE80211_ADDR_LEN], 1438 struct ieee80211_meshprep_ie *prep) 1439{ 1440 /* NB: there's no PREP minimum interval. */ 1441 1442 /* 1443 * mesh prep action frame format 1444 * [6] da 1445 * [6] sa 1446 * [6] addr3 = sa 1447 * [1] action 1448 * [1] category 1449 * [tlv] mesh path reply 1450 */ 1451 prep->prep_ie = IEEE80211_ELEMID_MESHPREP; 1452 prep->prep_len = prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE ? 1453 IEEE80211_MESHPREP_BASE_SZ_AE : IEEE80211_MESHPREP_BASE_SZ; 1454 return hwmp_send_action(vap, da, (uint8_t *)prep, prep->prep_len + 2); 1455} 1456 1457#define PERR_DFLAGS(n) perr.perr_dests[n].dest_flags 1458#define PERR_DADDR(n) perr.perr_dests[n].dest_addr 1459#define PERR_DSEQ(n) perr.perr_dests[n].dest_seq 1460#define PERR_DRCODE(n) perr.perr_dests[n].dest_rcode 1461static void 1462hwmp_peerdown(struct ieee80211_node *ni) 1463{ 1464 struct ieee80211vap *vap = ni->ni_vap; 1465 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1466 struct ieee80211_meshperr_ie perr; 1467 struct ieee80211_mesh_route *rt; 1468 struct ieee80211_hwmp_route *hr; 1469 1470 rt = ieee80211_mesh_rt_find(vap, ni->ni_macaddr); 1471 if (rt == NULL) 1472 return; 1473 hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); 1474 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1475 "%s", "delete route entry"); 1476 perr.perr_ttl = ms->ms_ttl; 1477 perr.perr_ndests = 1; 1478 PERR_DFLAGS(0) = 0; 1479 if (hr->hr_seq == 0) 1480 PERR_DFLAGS(0) |= IEEE80211_MESHPERR_DFLAGS_USN; 1481 PERR_DFLAGS(0) |= IEEE80211_MESHPERR_DFLAGS_RC; 1482 IEEE80211_ADDR_COPY(PERR_DADDR(0), rt->rt_dest); 1483 PERR_DSEQ(0) = ++hr->hr_seq; 1484 PERR_DRCODE(0) = IEEE80211_REASON_MESH_PERR_DEST_UNREACH; 1485 /* NB: flush everything passing through peer */ 1486 ieee80211_mesh_rt_flush_peer(vap, ni->ni_macaddr); 1487 hwmp_send_perr(vap, broadcastaddr, &perr); 1488} 1489#undef PERR_DFLAGS 1490#undef PERR_DADDR 1491#undef PERR_DSEQ 1492#undef PERR_DRCODE 1493 1494#define PERR_DFLAGS(n) perr->perr_dests[n].dest_flags 1495#define PERR_DADDR(n) perr->perr_dests[n].dest_addr 1496#define PERR_DSEQ(n) perr->perr_dests[n].dest_seq 1497#define PERR_DEXTADDR(n) perr->perr_dests[n].dest_ext_addr 1498#define PERR_DRCODE(n) perr->perr_dests[n].dest_rcode 1499static void 1500hwmp_recv_perr(struct ieee80211vap *vap, struct ieee80211_node *ni, 1501 const struct ieee80211_frame *wh, const struct ieee80211_meshperr_ie *perr) 1502{ 1503 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1504 struct ieee80211_mesh_route *rt = NULL; 1505 struct ieee80211_mesh_route *rt_ext = NULL; 1506 struct ieee80211_hwmp_route *hr; 1507 struct ieee80211_meshperr_ie *pperr = NULL; 1508 int i, j = 0, forward = 0; 1509 1510 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1511 "received PERR from %6D", wh->i_addr2, ":"); 1512 1513 /* 1514 * if forwarding is true, prepare pperr 1515 */ 1516 if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) { 1517 forward = 1; 1518 pperr = malloc(sizeof(*perr) + 31*sizeof(*perr->perr_dests), 1519 M_80211_MESH_PERR, M_NOWAIT); /* XXX: magic number, 32 err dests */ 1520 } 1521 1522 /* 1523 * Acceptance criteria: check if we have forwarding information 1524 * stored about destination, and that nexthop == TA of this PERR. 1525 * NB: we also build a new PERR to propagate in case we should forward. 1526 */ 1527 for (i = 0; i < perr->perr_ndests; i++) { 1528 rt = ieee80211_mesh_rt_find(vap, PERR_DADDR(i)); 1529 if (rt == NULL) 1530 continue; 1531 if (!IEEE80211_ADDR_EQ(rt->rt_nexthop, wh->i_addr2)) 1532 continue; 1533 1534 /* found and accepted a PERR ndest element, process it... */ 1535 if (forward) 1536 memcpy(&pperr->perr_dests[j], &perr->perr_dests[i], 1537 sizeof(*perr->perr_dests)); 1538 hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); 1539 switch(PERR_DFLAGS(i)) { 1540 case (IEEE80211_REASON_MESH_PERR_NO_FI): 1541 if (PERR_DSEQ(i) == 0) { 1542 hr->hr_seq++; 1543 if (forward) { 1544 pperr->perr_dests[j].dest_seq = 1545 hr->hr_seq; 1546 } 1547 } else { 1548 hr->hr_seq = PERR_DSEQ(i); 1549 } 1550 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 1551 j++; 1552 break; 1553 case (IEEE80211_REASON_MESH_PERR_DEST_UNREACH): 1554 if(HWMP_SEQ_GT(PERR_DSEQ(i), hr->hr_seq)) { 1555 hr->hr_seq = PERR_DSEQ(i); 1556 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; 1557 j++; 1558 } 1559 break; 1560 case (IEEE80211_REASON_MESH_PERR_NO_PROXY): 1561 rt_ext = ieee80211_mesh_rt_find(vap, PERR_DEXTADDR(i)); 1562 if (rt_ext != NULL) { 1563 rt_ext->rt_flags &= 1564 ~IEEE80211_MESHRT_FLAGS_VALID; 1565 j++; 1566 } 1567 break; 1568 default: 1569 IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, 1570 "PERR, unknown reason code %u\n", PERR_DFLAGS(i)); 1571 goto done; /* XXX: stats?? */ 1572 } 1573 ieee80211_mesh_rt_flush_peer(vap, PERR_DADDR(i)); 1574 KASSERT(j < 32, ("PERR, error ndest >= 32 (%u)", j)); 1575 } 1576 if (j == 0) { 1577 IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, "%s", 1578 "PERR not accepted"); 1579 goto done; /* XXX: stats?? */ 1580 } 1581 1582 /* 1583 * Propagate the PERR if we previously found it on our routing table. 1584 */ 1585 if (forward && perr->perr_ttl > 1) { 1586 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, 1587 "propagate PERR from %6D", wh->i_addr2, ":"); 1588 pperr->perr_ndests = j; 1589 pperr->perr_ttl--; 1590 hwmp_send_perr(vap, broadcastaddr, pperr); 1591 } 1592done: 1593 if (pperr != NULL) 1594 free(pperr, M_80211_MESH_PERR); 1595} 1596#undef PERR_DFLAGS 1597#undef PERR_DADDR 1598#undef PERR_DSEQ 1599#undef PERR_DEXTADDR 1600#undef PERR_DRCODE 1601 1602static int 1603hwmp_send_perr(struct ieee80211vap *vap, 1604 const uint8_t da[IEEE80211_ADDR_LEN], 1605 struct ieee80211_meshperr_ie *perr) 1606{ 1607 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 1608 int i; 1609 uint8_t length = 0; 1610 1611 /* 1612 * Enforce PERR interval. 1613 */ 1614 if (ratecheck(&hs->hs_lastperr, &ieee80211_hwmp_perrminint) == 0) 1615 return EALREADY; 1616 getmicrouptime(&hs->hs_lastperr); 1617 1618 /* 1619 * mesh perr action frame format 1620 * [6] da 1621 * [6] sa 1622 * [6] addr3 = sa 1623 * [1] action 1624 * [1] category 1625 * [tlv] mesh path error 1626 */ 1627 perr->perr_ie = IEEE80211_ELEMID_MESHPERR; 1628 length = IEEE80211_MESHPERR_BASE_SZ; 1629 for (i = 0; i<perr->perr_ndests; i++) { 1630 if (perr->perr_dests[i].dest_flags & 1631 IEEE80211_MESHPERR_FLAGS_AE) { 1632 length += IEEE80211_MESHPERR_DEST_SZ_AE; 1633 continue ; 1634 } 1635 length += IEEE80211_MESHPERR_DEST_SZ; 1636 } 1637 perr->perr_len =length; 1638 return hwmp_send_action(vap, da, (uint8_t *)perr, perr->perr_len+2); 1639} 1640 1641/* 1642 * Called from the rest of the net80211 code (mesh code for example). 1643 * NB: IEEE80211_REASON_MESH_PERR_DEST_UNREACH can be trigger by the fact that 1644 * a mesh STA is unable to forward an MSDU/MMPDU to a next-hop mesh STA. 1645 */ 1646#define PERR_DFLAGS(n) perr.perr_dests[n].dest_flags 1647#define PERR_DADDR(n) perr.perr_dests[n].dest_addr 1648#define PERR_DSEQ(n) perr.perr_dests[n].dest_seq 1649#define PERR_DEXTADDR(n) perr.perr_dests[n].dest_ext_addr 1650#define PERR_DRCODE(n) perr.perr_dests[n].dest_rcode 1651static void 1652hwmp_senderror(struct ieee80211vap *vap, 1653 const uint8_t addr[IEEE80211_ADDR_LEN], 1654 struct ieee80211_mesh_route *rt, int rcode) 1655{ 1656 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1657 struct ieee80211_hwmp_route *hr = NULL; 1658 struct ieee80211_meshperr_ie perr; 1659 1660 if (rt != NULL) 1661 hr = IEEE80211_MESH_ROUTE_PRIV(rt, 1662 struct ieee80211_hwmp_route); 1663 1664 perr.perr_ndests = 1; 1665 perr.perr_ttl = ms->ms_ttl; 1666 PERR_DFLAGS(0) = 0; 1667 PERR_DRCODE(0) = rcode; 1668 1669 switch (rcode) { 1670 case IEEE80211_REASON_MESH_PERR_NO_FI: 1671 IEEE80211_ADDR_COPY(PERR_DADDR(0), addr); 1672 PERR_DSEQ(0) = 0; /* reserved */ 1673 break; 1674 case IEEE80211_REASON_MESH_PERR_NO_PROXY: 1675 KASSERT(rt != NULL, ("no proxy info for sending PERR")); 1676 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, 1677 ("route is not marked proxy")); 1678 PERR_DFLAGS(0) |= IEEE80211_MESHPERR_FLAGS_AE; 1679 IEEE80211_ADDR_COPY(PERR_DADDR(0), vap->iv_myaddr); 1680 PERR_DSEQ(0) = rt->rt_ext_seq; 1681 IEEE80211_ADDR_COPY(PERR_DEXTADDR(0), addr); 1682 break; 1683 case IEEE80211_REASON_MESH_PERR_DEST_UNREACH: 1684 KASSERT(rt != NULL, ("no route info for sending PERR")); 1685 IEEE80211_ADDR_COPY(PERR_DADDR(0), addr); 1686 PERR_DSEQ(0) = hr->hr_seq; 1687 break; 1688 default: 1689 KASSERT(0, ("unknown reason code for HWMP PERR (%u)", rcode)); 1690 } 1691 hwmp_send_perr(vap, broadcastaddr, &perr); 1692} 1693#undef PERR_DFLAGS 1694#undef PEER_DADDR 1695#undef PERR_DSEQ 1696#undef PERR_DEXTADDR 1697#undef PERR_DRCODE 1698 1699static void 1700hwmp_recv_rann(struct ieee80211vap *vap, struct ieee80211_node *ni, 1701 const struct ieee80211_frame *wh, const struct ieee80211_meshrann_ie *rann) 1702{ 1703 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1704 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 1705 struct ieee80211_mesh_route *rt = NULL; 1706 struct ieee80211_hwmp_route *hr; 1707 struct ieee80211_meshpreq_ie preq; 1708 struct ieee80211_meshrann_ie prann; 1709 uint32_t metric = 0; 1710 1711 if (IEEE80211_ADDR_EQ(rann->rann_addr, vap->iv_myaddr)) 1712 return; 1713 1714 rt = ieee80211_mesh_rt_find(vap, rann->rann_addr); 1715 if (rt != NULL && rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { 1716 hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); 1717 1718 /* Acceptance criteria: if RANN.seq < stored seq, discard RANN */ 1719 if (HWMP_SEQ_LT(rann->rann_seq, hr->hr_seq)) { 1720 IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, 1721 "RANN seq %u < %u", rann->rann_seq, hr->hr_seq); 1722 return; 1723 } 1724 1725 /* Acceptance criteria: if RANN.seq == stored seq AND 1726 * RANN.metric > stored metric, discard RANN */ 1727 if (HWMP_SEQ_EQ(rann->rann_seq, hr->hr_seq) && 1728 rann->rann_metric > rt->rt_metric) { 1729 IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, 1730 "RANN metric %u > %u", rann->rann_metric, rt->rt_metric); 1731 return; 1732 } 1733 } 1734 1735 /* RANN ACCEPTED */ 1736 1737 ieee80211_hwmp_rannint = rann->rann_interval; /* XXX: mtx lock? */ 1738 metric = rann->rann_metric + ms->ms_pmetric->mpm_metric(ni); 1739 1740 if (rt == NULL) { 1741 rt = ieee80211_mesh_rt_add(vap, rann->rann_addr); 1742 if (rt == NULL) { 1743 IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, 1744 "unable to add mac for RANN root %6D", 1745 rann->rann_addr, ":"); 1746 vap->iv_stats.is_mesh_rtaddfailed++; 1747 return; 1748 } 1749 } 1750 hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); 1751 /* Check if root is a mesh gate, mark it */ 1752 if (rann->rann_flags & IEEE80211_MESHRANN_FLAGS_GATE) { 1753 struct ieee80211_mesh_gate_route *gr; 1754 1755 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; 1756 gr = ieee80211_mesh_mark_gate(vap, rann->rann_addr, 1757 rt); 1758 gr->gr_lastseq = 0; /* NOT GANN */ 1759 } 1760 /* discovery timeout */ 1761 ieee80211_mesh_rt_update(rt, 1762 ticks_to_msecs(ieee80211_hwmp_roottimeout)); 1763 1764 preq.preq_flags = IEEE80211_MESHPREQ_FLAGS_AM; 1765 preq.preq_hopcount = 0; 1766 preq.preq_ttl = ms->ms_ttl; 1767 preq.preq_id = 0; /* reserved */ 1768 IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr); 1769 preq.preq_origseq = ++hs->hs_seq; 1770 preq.preq_lifetime = ieee80211_hwmp_roottimeout; 1771 preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL; 1772 preq.preq_tcount = 1; 1773 preq.preq_targets[0].target_flags = IEEE80211_MESHPREQ_TFLAGS_TO; 1774 /* NB: IEEE80211_MESHPREQ_TFLAGS_USN = 0 implicitly implied */ 1775 IEEE80211_ADDR_COPY(preq.preq_targets[0].target_addr, rann->rann_addr); 1776 preq.preq_targets[0].target_seq = rann->rann_seq; 1777 /* XXX: if rootconfint have not passed, we built this preq in vain */ 1778 hwmp_send_preq(vap, wh->i_addr2, &preq, &hr->hr_lastrootconf, 1779 &ieee80211_hwmp_rootconfint); 1780 1781 /* propagate a RANN */ 1782 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID && 1783 rann->rann_ttl > 1 && 1784 ms->ms_flags & IEEE80211_MESHFLAGS_FWD) { 1785 hr->hr_seq = rann->rann_seq; 1786 memcpy(&prann, rann, sizeof(prann)); 1787 prann.rann_hopcount += 1; 1788 prann.rann_ttl -= 1; 1789 prann.rann_metric += ms->ms_pmetric->mpm_metric(ni); 1790 hwmp_send_rann(vap, broadcastaddr, &prann); 1791 } 1792} 1793 1794static int 1795hwmp_send_rann(struct ieee80211vap *vap, 1796 const uint8_t da[IEEE80211_ADDR_LEN], 1797 struct ieee80211_meshrann_ie *rann) 1798{ 1799 /* 1800 * mesh rann action frame format 1801 * [6] da 1802 * [6] sa 1803 * [6] addr3 = sa 1804 * [1] action 1805 * [1] category 1806 * [tlv] root annoucement 1807 */ 1808 rann->rann_ie = IEEE80211_ELEMID_MESHRANN; 1809 rann->rann_len = IEEE80211_MESHRANN_BASE_SZ; 1810 return hwmp_send_action(vap, da, (uint8_t *)rann, rann->rann_len + 2); 1811} 1812 1813#define PREQ_TFLAGS(n) preq.preq_targets[n].target_flags 1814#define PREQ_TADDR(n) preq.preq_targets[n].target_addr 1815#define PREQ_TSEQ(n) preq.preq_targets[n].target_seq 1816static void 1817hwmp_rediscover_cb(void *arg) 1818{ 1819 struct ieee80211_mesh_route *rt = arg; 1820 struct ieee80211vap *vap = rt->rt_vap; 1821 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 1822 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1823 struct ieee80211_hwmp_route *hr; 1824 struct ieee80211_meshpreq_ie preq; /* Optimize: storing first preq? */ 1825 1826 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID)) 1827 return ; /* nothing to do */ 1828 1829 hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); 1830 if (hr->hr_preqretries >= 1831 ieee80211_hwmp_maxpreq_retries) { 1832 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, 1833 rt->rt_dest, "%s", 1834 "max number of discovery, send queued frames to GATE"); 1835 ieee80211_mesh_forward_to_gates(vap, rt); 1836 vap->iv_stats.is_mesh_fwd_nopath++; 1837 return ; /* XXX: flush queue? */ 1838 } 1839 1840 hr->hr_preqretries++; 1841 1842 1843 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, rt->rt_dest, 1844 "start path rediscovery , target seq %u", hr->hr_seq); 1845 /* 1846 * Try to discover the path for this node. 1847 * Group addressed PREQ Case A 1848 */ 1849 preq.preq_flags = 0; 1850 preq.preq_hopcount = 0; 1851 preq.preq_ttl = ms->ms_ttl; 1852 preq.preq_id = ++hs->hs_preqid; 1853 IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr); 1854 preq.preq_origseq = hr->hr_origseq; 1855 preq.preq_lifetime = ticks_to_msecs(ieee80211_hwmp_pathtimeout); 1856 preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL; 1857 preq.preq_tcount = 1; 1858 IEEE80211_ADDR_COPY(PREQ_TADDR(0), rt->rt_dest); 1859 PREQ_TFLAGS(0) = 0; 1860 if (ieee80211_hwmp_targetonly) 1861 PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_TO; 1862 PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_USN; 1863 PREQ_TSEQ(0) = 0; /* RESERVED when USN flag is set */ 1864 /* XXX check return value */ 1865 hwmp_send_preq(vap, broadcastaddr, &preq, &hr->hr_lastpreq, 1866 &ieee80211_hwmp_preqminint); 1867 callout_reset(&rt->rt_discovery, 1868 ieee80211_hwmp_net_diameter_traversaltime * 2, 1869 hwmp_rediscover_cb, rt); 1870} 1871 1872static struct ieee80211_node * 1873hwmp_discover(struct ieee80211vap *vap, 1874 const uint8_t dest[IEEE80211_ADDR_LEN], struct mbuf *m) 1875{ 1876 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 1877 struct ieee80211_mesh_state *ms = vap->iv_mesh; 1878 struct ieee80211_mesh_route *rt = NULL; 1879 struct ieee80211_hwmp_route *hr; 1880 struct ieee80211_meshpreq_ie preq; 1881 struct ieee80211_node *ni; 1882 int sendpreq = 0; 1883 1884 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, 1885 ("not a mesh vap, opmode %d", vap->iv_opmode)); 1886 1887 KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), 1888 ("%s: discovering self!", __func__)); 1889 1890 ni = NULL; 1891 if (!IEEE80211_IS_MULTICAST(dest)) { 1892 rt = ieee80211_mesh_rt_find(vap, dest); 1893 if (rt == NULL) { 1894 rt = ieee80211_mesh_rt_add(vap, dest); 1895 if (rt == NULL) { 1896 IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, 1897 ni, "unable to add discovery path to %6D", 1898 dest, ":"); 1899 vap->iv_stats.is_mesh_rtaddfailed++; 1900 goto done; 1901 } 1902 } 1903 hr = IEEE80211_MESH_ROUTE_PRIV(rt, 1904 struct ieee80211_hwmp_route); 1905 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) { 1906 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, dest, 1907 "%s", "already discovering queue frame until path found"); 1908 sendpreq = 1; 1909 goto done; 1910 } 1911 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { 1912 if (hr->hr_lastdiscovery != 0 && 1913 (ticks - hr->hr_lastdiscovery < 1914 (ieee80211_hwmp_net_diameter_traversaltime * 2))) { 1915 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1916 dest, NULL, "%s", 1917 "too frequent discovery requeust"); 1918 sendpreq = 1; 1919 goto done; 1920 } 1921 hr->hr_lastdiscovery = ticks; 1922 if (hr->hr_preqretries >= 1923 ieee80211_hwmp_maxpreq_retries) { 1924 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 1925 dest, NULL, "%s", 1926 "no valid path , max number of discovery"); 1927 vap->iv_stats.is_mesh_fwd_nopath++; 1928 goto done; 1929 } 1930 rt->rt_flags = IEEE80211_MESHRT_FLAGS_DISCOVER; 1931 hr->hr_preqretries++; 1932 if (hr->hr_origseq == 0) 1933 hr->hr_origseq = ++hs->hs_seq; 1934 rt->rt_metric = IEEE80211_MESHLMETRIC_INITIALVAL; 1935 sendpreq = 1; 1936 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, dest, 1937 "start path discovery (src %s), target seq %u", 1938 m == NULL ? "<none>" : ether_sprintf( 1939 mtod(m, struct ether_header *)->ether_shost), 1940 hr->hr_seq); 1941 /* 1942 * Try to discover the path for this node. 1943 * Group addressed PREQ Case A 1944 */ 1945 preq.preq_flags = 0; 1946 preq.preq_hopcount = 0; 1947 preq.preq_ttl = ms->ms_ttl; 1948 preq.preq_id = ++hs->hs_preqid; 1949 IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr); 1950 preq.preq_origseq = hr->hr_origseq; 1951 preq.preq_lifetime = 1952 ticks_to_msecs(ieee80211_hwmp_pathtimeout); 1953 preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL; 1954 preq.preq_tcount = 1; 1955 IEEE80211_ADDR_COPY(PREQ_TADDR(0), dest); 1956 PREQ_TFLAGS(0) = 0; 1957 if (ieee80211_hwmp_targetonly) 1958 PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_TO; 1959 PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_USN; 1960 PREQ_TSEQ(0) = 0; /* RESERVED when USN flag is set */ 1961 /* XXX check return value */ 1962 hwmp_send_preq(vap, broadcastaddr, &preq, 1963 &hr->hr_lastpreq, &ieee80211_hwmp_preqminint); 1964 callout_reset(&rt->rt_discovery, 1965 ieee80211_hwmp_net_diameter_traversaltime * 2, 1966 hwmp_rediscover_cb, rt); 1967 } 1968 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) 1969 ni = ieee80211_find_txnode(vap, rt->rt_nexthop); 1970 } else { 1971 ni = ieee80211_find_txnode(vap, dest); 1972 /* NB: if null then we leak mbuf */ 1973 KASSERT(ni != NULL, ("leak mcast frame")); 1974 return ni; 1975 } 1976done: 1977 if (ni == NULL && m != NULL) { 1978 if (sendpreq) { 1979 struct ieee80211com *ic = vap->iv_ic; 1980 /* 1981 * Queue packet for transmit when path discovery 1982 * completes. If discovery never completes the 1983 * frame will be flushed by way of the aging timer. 1984 */ 1985 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, dest, 1986 "%s", "queue frame until path found"); 1987 m->m_pkthdr.rcvif = (void *)(uintptr_t) 1988 ieee80211_mac_hash(ic, dest); 1989 /* XXX age chosen randomly */ 1990 ieee80211_ageq_append(&ic->ic_stageq, m, 1991 IEEE80211_INACT_WAIT); 1992 } else { 1993 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_HWMP, 1994 dest, NULL, "%s", "no valid path to this node"); 1995 m_freem(m); 1996 } 1997 } 1998 return ni; 1999} 2000#undef PREQ_TFLAGS 2001#undef PREQ_TADDR 2002#undef PREQ_TSEQ 2003 2004static int 2005hwmp_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 2006{ 2007 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 2008 int error; 2009 2010 if (vap->iv_opmode != IEEE80211_M_MBSS) 2011 return ENOSYS; 2012 error = 0; 2013 switch (ireq->i_type) { 2014 case IEEE80211_IOC_HWMP_ROOTMODE: 2015 ireq->i_val = hs->hs_rootmode; 2016 break; 2017 case IEEE80211_IOC_HWMP_MAXHOPS: 2018 ireq->i_val = hs->hs_maxhops; 2019 break; 2020 default: 2021 return ENOSYS; 2022 } 2023 return error; 2024} 2025IEEE80211_IOCTL_GET(hwmp, hwmp_ioctl_get80211); 2026 2027static int 2028hwmp_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) 2029{ 2030 struct ieee80211_hwmp_state *hs = vap->iv_hwmp; 2031 int error; 2032 2033 if (vap->iv_opmode != IEEE80211_M_MBSS) 2034 return ENOSYS; 2035 error = 0; 2036 switch (ireq->i_type) { 2037 case IEEE80211_IOC_HWMP_ROOTMODE: 2038 if (ireq->i_val < 0 || ireq->i_val > 3) 2039 return EINVAL; 2040 hs->hs_rootmode = ireq->i_val; 2041 hwmp_rootmode_setup(vap); 2042 break; 2043 case IEEE80211_IOC_HWMP_MAXHOPS: 2044 if (ireq->i_val <= 0 || ireq->i_val > 255) 2045 return EINVAL; 2046 hs->hs_maxhops = ireq->i_val; 2047 break; 2048 default: 2049 return ENOSYS; 2050 } 2051 return error; 2052} 2053IEEE80211_IOCTL_SET(hwmp, hwmp_ioctl_set80211); 2054