| 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("$FreeBSD$"); |
| 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 <netproto/802_11/ieee80211_var.h> |
| 63 | #include <netproto/802_11/ieee80211_action.h> |
| 64 | #include <netproto/802_11/ieee80211_input.h> |
| 65 | #include <netproto/802_11/ieee80211_mesh.h> |
| 66 | |
| 67 | static void hwmp_vattach(struct ieee80211vap *); |
| 68 | static void hwmp_vdetach(struct ieee80211vap *); |
| 69 | static int hwmp_newstate(struct ieee80211vap *, |
| 70 | enum ieee80211_state, int); |
| 71 | static int hwmp_send_action(struct ieee80211vap *, |
| 72 | const uint8_t [IEEE80211_ADDR_LEN], |
| 73 | uint8_t *, size_t); |
| 74 | static uint8_t * hwmp_add_meshpreq(uint8_t *, |
| 75 | const struct ieee80211_meshpreq_ie *); |
| 76 | static uint8_t * hwmp_add_meshprep(uint8_t *, |
| 77 | const struct ieee80211_meshprep_ie *); |
| 78 | static uint8_t * hwmp_add_meshperr(uint8_t *, |
| 79 | const struct ieee80211_meshperr_ie *); |
| 80 | static uint8_t * hwmp_add_meshrann(uint8_t *, |
| 81 | const struct ieee80211_meshrann_ie *); |
| 82 | static void hwmp_rootmode_setup(struct ieee80211vap *); |
| 83 | static void hwmp_rootmode_cb(void *); |
| 84 | static void hwmp_rootmode_rann_cb(void *); |
| 85 | static void hwmp_recv_preq(struct ieee80211vap *, struct ieee80211_node *, |
| 86 | const struct ieee80211_frame *, |
| 87 | const struct ieee80211_meshpreq_ie *); |
| 88 | static int hwmp_send_preq(struct ieee80211vap *, |
| 89 | const uint8_t [IEEE80211_ADDR_LEN], |
| 90 | struct ieee80211_meshpreq_ie *, |
| 91 | struct timeval *, struct timeval *); |
| 92 | static void hwmp_recv_prep(struct ieee80211vap *, struct ieee80211_node *, |
| 93 | const struct ieee80211_frame *, |
| 94 | const struct ieee80211_meshprep_ie *); |
| 95 | static int hwmp_send_prep(struct ieee80211vap *, |
| 96 | const uint8_t [IEEE80211_ADDR_LEN], |
| 97 | struct ieee80211_meshprep_ie *); |
| 98 | static void hwmp_recv_perr(struct ieee80211vap *, struct ieee80211_node *, |
| 99 | const struct ieee80211_frame *, |
| 100 | const struct ieee80211_meshperr_ie *); |
| 101 | static int hwmp_send_perr(struct ieee80211vap *, |
| 102 | const uint8_t [IEEE80211_ADDR_LEN], |
| 103 | struct ieee80211_meshperr_ie *); |
| 104 | static void hwmp_senderror(struct ieee80211vap *, |
| 105 | const uint8_t [IEEE80211_ADDR_LEN], |
| 106 | struct ieee80211_mesh_route *, int); |
| 107 | static void hwmp_recv_rann(struct ieee80211vap *, struct ieee80211_node *, |
| 108 | const struct ieee80211_frame *, |
| 109 | const struct ieee80211_meshrann_ie *); |
| 110 | static int hwmp_send_rann(struct ieee80211vap *, |
| 111 | const uint8_t [IEEE80211_ADDR_LEN], |
| 112 | struct ieee80211_meshrann_ie *); |
| 113 | static struct ieee80211_node * |
| 114 | hwmp_discover(struct ieee80211vap *, |
| 115 | const uint8_t [IEEE80211_ADDR_LEN], struct mbuf *); |
| 116 | static void hwmp_peerdown(struct ieee80211_node *); |
| 117 | |
| 118 | static struct timeval ieee80211_hwmp_preqminint = { 0, 100000 }; |
| 119 | static 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. */ |
| 135 | static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] = |
| 136 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
| 137 | |
| 138 | typedef 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 | */ |
| 150 | struct 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 | }; |
| 159 | struct 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 | |
| 168 | static SYSCTL_NODE(_net_wlan, OID_AUTO, hwmp, CTLFLAG_RD, 0, |
| 169 | "IEEE 802.11s HWMP parameters"); |
| 170 | static int ieee80211_hwmp_targetonly = 0; |
| 171 | SYSCTL_INT(_net_wlan_hwmp, OID_AUTO, targetonly, CTLFLAG_RW, |
| 172 | &ieee80211_hwmp_targetonly, 0, "Set TO bit on generated PREQs"); |
| 173 | static int ieee80211_hwmp_pathtimeout = -1; |
| 174 | SYSCTL_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)"); |
| 177 | static int ieee80211_hwmp_maxpreq_retries = -1; |
| 178 | SYSCTL_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"); |
| 181 | static int ieee80211_hwmp_net_diameter_traversaltime = -1; |
| 182 | SYSCTL_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)"); |
| 186 | static int ieee80211_hwmp_roottimeout = -1; |
| 187 | SYSCTL_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)"); |
| 190 | static int ieee80211_hwmp_rootint = -1; |
| 191 | SYSCTL_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)"); |
| 194 | static int ieee80211_hwmp_rannint = -1; |
| 195 | SYSCTL_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)"); |
| 198 | static struct timeval ieee80211_hwmp_rootconfint = { 0, 0 }; |
| 199 | static int ieee80211_hwmp_rootconfint_internal = -1; |
| 200 | SYSCTL_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 | |
| 206 | static ieee80211_recv_action_func hwmp_recv_action_meshpath; |
| 207 | |
| 208 | static 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 | }; |
| 219 | SYSCTL_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 | |
| 224 | static void |
| 225 | ieee80211_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 μs, |
| 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 | } |
| 261 | SYSINIT(wlan_hwmp, SI_SUB_DRIVERS, SI_ORDER_SECOND, ieee80211_hwmp_init, NULL); |
| 262 | |
| 263 | void |
| 264 | hwmp_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 = kmalloc(sizeof(struct ieee80211_hwmp_state), M_80211_VAP, |
| 272 | M_INTWAIT | M_ZERO); |
| 273 | if (hs == NULL) { |
| 274 | kprintf("%s: couldn't alloc HWMP state\n", __func__); |
| 275 | return; |
| 276 | } |
| 277 | hs->hs_maxhops = IEEE80211_HWMP_DEFAULT_MAXHOPS; |
| 278 | callout_init_mp(&hs->hs_roottimer); |
| 279 | vap->iv_hwmp = hs; |
| 280 | } |
| 281 | |
| 282 | void |
| 283 | hwmp_vdetach(struct ieee80211vap *vap) |
| 284 | { |
| 285 | struct ieee80211_hwmp_state *hs = vap->iv_hwmp; |
| 286 | |
| 287 | callout_drain(&hs->hs_roottimer); |
| 288 | kfree(vap->iv_hwmp, M_80211_VAP); |
| 289 | vap->iv_hwmp = NULL; |
| 290 | } |
| 291 | |
| 292 | int |
| 293 | hwmp_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 | */ |
| 313 | static int |
| 314 | verify_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 | */ |
| 344 | static int |
| 345 | verify_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 | */ |
| 368 | static int |
| 369 | verify_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 | |
| 404 | static int |
| 405 | hwmp_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 = kmalloc(sizeof(*preq) + |
| 433 | (ndest - 1) * sizeof(*preq->preq_targets), |
| 434 | M_80211_MESH_PREQ, M_INTWAIT | 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 | kfree(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 = kmalloc(sizeof(*prep), |
| 480 | M_80211_MESH_PREP, M_INTWAIT | 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 | kfree(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 = kmalloc(sizeof(*perr) + |
| 519 | (ndest - 1) * sizeof(*perr->perr_dests), |
| 520 | M_80211_MESH_PERR, M_INTWAIT | 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 | kfree(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 | |
| 585 | static int |
| 586 | hwmp_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 | int ret; |
| 596 | |
| 597 | if (IEEE80211_IS_MULTICAST(da)) { |
| 598 | ni = ieee80211_ref_node(vap->iv_bss); |
| 599 | #ifdef IEEE80211_DEBUG_REFCNT |
| 600 | IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, |
| 601 | "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", |
| 602 | __func__, __LINE__, |
| 603 | ni, ether_sprintf(ni->ni_macaddr), |
| 604 | ieee80211_node_refcnt(ni)+1); |
| 605 | #endif |
| 606 | ieee80211_ref_node(ni); |
| 607 | } |
| 608 | else |
| 609 | ni = ieee80211_mesh_find_txnode(vap, da); |
| 610 | |
| 611 | if (vap->iv_state == IEEE80211_S_CAC) { |
| 612 | IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni, |
| 613 | "block %s frame in CAC state", "HWMP action"); |
| 614 | vap->iv_stats.is_tx_badstate++; |
| 615 | return EIO; /* XXX */ |
| 616 | } |
| 617 | |
| 618 | KASSERT(ni != NULL, ("null node")); |
| 619 | ic = ni->ni_ic; |
| 620 | |
| 621 | m = ieee80211_getmgtframe(&frm, |
| 622 | ic->ic_headroom + sizeof(struct ieee80211_frame), |
| 623 | sizeof(struct ieee80211_action) + len |
| 624 | ); |
| 625 | if (m == NULL) { |
| 626 | ieee80211_free_node(ni); |
| 627 | vap->iv_stats.is_tx_nobuf++; |
| 628 | return ENOMEM; |
| 629 | } |
| 630 | *frm++ = IEEE80211_ACTION_CAT_MESH; |
| 631 | *frm++ = IEEE80211_ACTION_MESH_HWMP; |
| 632 | switch (*ie) { |
| 633 | case IEEE80211_ELEMID_MESHPREQ: |
| 634 | frm = hwmp_add_meshpreq(frm, |
| 635 | (struct ieee80211_meshpreq_ie *)ie); |
| 636 | break; |
| 637 | case IEEE80211_ELEMID_MESHPREP: |
| 638 | frm = hwmp_add_meshprep(frm, |
| 639 | (struct ieee80211_meshprep_ie *)ie); |
| 640 | break; |
| 641 | case IEEE80211_ELEMID_MESHPERR: |
| 642 | frm = hwmp_add_meshperr(frm, |
| 643 | (struct ieee80211_meshperr_ie *)ie); |
| 644 | break; |
| 645 | case IEEE80211_ELEMID_MESHRANN: |
| 646 | frm = hwmp_add_meshrann(frm, |
| 647 | (struct ieee80211_meshrann_ie *)ie); |
| 648 | break; |
| 649 | } |
| 650 | |
| 651 | m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); |
| 652 | M_PREPEND(m, sizeof(struct ieee80211_frame), MB_DONTWAIT); |
| 653 | if (m == NULL) { |
| 654 | ieee80211_free_node(ni); |
| 655 | vap->iv_stats.is_tx_nobuf++; |
| 656 | return ENOMEM; |
| 657 | } |
| 658 | |
| 659 | IEEE80211_TX_LOCK(ic); |
| 660 | |
| 661 | ieee80211_send_setup(ni, m, |
| 662 | IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION, |
| 663 | IEEE80211_NONQOS_TID, vap->iv_myaddr, da, vap->iv_myaddr); |
| 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 | ret = ieee80211_raw_output(vap, ni, m, ¶ms); |
| 677 | IEEE80211_TX_UNLOCK(ic); |
| 678 | return (ret); |
| 679 | } |
| 680 | |
| 681 | #define ADDSHORT(frm, v) do { \ |
| 682 | frm[0] = (v) & 0xff; \ |
| 683 | frm[1] = (v) >> 8; \ |
| 684 | frm += 2; \ |
| 685 | } while (0) |
| 686 | #define ADDWORD(frm, v) do { \ |
| 687 | LE_WRITE_4(frm, v); \ |
| 688 | frm += 4; \ |
| 689 | } while (0) |
| 690 | /* |
| 691 | * Add a Mesh Path Request IE to a frame. |
| 692 | */ |
| 693 | #define PREQ_TFLAGS(n) preq->preq_targets[n].target_flags |
| 694 | #define PREQ_TADDR(n) preq->preq_targets[n].target_addr |
| 695 | #define PREQ_TSEQ(n) preq->preq_targets[n].target_seq |
| 696 | static uint8_t * |
| 697 | hwmp_add_meshpreq(uint8_t *frm, const struct ieee80211_meshpreq_ie *preq) |
| 698 | { |
| 699 | int i; |
| 700 | |
| 701 | *frm++ = IEEE80211_ELEMID_MESHPREQ; |
| 702 | *frm++ = preq->preq_len; /* len already calculated */ |
| 703 | *frm++ = preq->preq_flags; |
| 704 | *frm++ = preq->preq_hopcount; |
| 705 | *frm++ = preq->preq_ttl; |
| 706 | ADDWORD(frm, preq->preq_id); |
| 707 | IEEE80211_ADDR_COPY(frm, preq->preq_origaddr); frm += 6; |
| 708 | ADDWORD(frm, preq->preq_origseq); |
| 709 | if (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE) { |
| 710 | IEEE80211_ADDR_COPY(frm, preq->preq_orig_ext_addr); |
| 711 | frm += 6; |
| 712 | } |
| 713 | ADDWORD(frm, preq->preq_lifetime); |
| 714 | ADDWORD(frm, preq->preq_metric); |
| 715 | *frm++ = preq->preq_tcount; |
| 716 | for (i = 0; i < preq->preq_tcount; i++) { |
| 717 | *frm++ = PREQ_TFLAGS(i); |
| 718 | IEEE80211_ADDR_COPY(frm, PREQ_TADDR(i)); |
| 719 | frm += 6; |
| 720 | ADDWORD(frm, PREQ_TSEQ(i)); |
| 721 | } |
| 722 | return frm; |
| 723 | } |
| 724 | #undef PREQ_TFLAGS |
| 725 | #undef PREQ_TADDR |
| 726 | #undef PREQ_TSEQ |
| 727 | |
| 728 | /* |
| 729 | * Add a Mesh Path Reply IE to a frame. |
| 730 | */ |
| 731 | static uint8_t * |
| 732 | hwmp_add_meshprep(uint8_t *frm, const struct ieee80211_meshprep_ie *prep) |
| 733 | { |
| 734 | *frm++ = IEEE80211_ELEMID_MESHPREP; |
| 735 | *frm++ = prep->prep_len; /* len already calculated */ |
| 736 | *frm++ = prep->prep_flags; |
| 737 | *frm++ = prep->prep_hopcount; |
| 738 | *frm++ = prep->prep_ttl; |
| 739 | IEEE80211_ADDR_COPY(frm, prep->prep_targetaddr); frm += 6; |
| 740 | ADDWORD(frm, prep->prep_targetseq); |
| 741 | if (prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE) { |
| 742 | IEEE80211_ADDR_COPY(frm, prep->prep_target_ext_addr); |
| 743 | frm += 6; |
| 744 | } |
| 745 | ADDWORD(frm, prep->prep_lifetime); |
| 746 | ADDWORD(frm, prep->prep_metric); |
| 747 | IEEE80211_ADDR_COPY(frm, prep->prep_origaddr); frm += 6; |
| 748 | ADDWORD(frm, prep->prep_origseq); |
| 749 | return frm; |
| 750 | } |
| 751 | |
| 752 | /* |
| 753 | * Add a Mesh Path Error IE to a frame. |
| 754 | */ |
| 755 | #define PERR_DFLAGS(n) perr->perr_dests[n].dest_flags |
| 756 | #define PERR_DADDR(n) perr->perr_dests[n].dest_addr |
| 757 | #define PERR_DSEQ(n) perr->perr_dests[n].dest_seq |
| 758 | #define PERR_EXTADDR(n) perr->perr_dests[n].dest_ext_addr |
| 759 | #define PERR_DRCODE(n) perr->perr_dests[n].dest_rcode |
| 760 | static uint8_t * |
| 761 | hwmp_add_meshperr(uint8_t *frm, const struct ieee80211_meshperr_ie *perr) |
| 762 | { |
| 763 | int i; |
| 764 | |
| 765 | *frm++ = IEEE80211_ELEMID_MESHPERR; |
| 766 | *frm++ = perr->perr_len; /* len already calculated */ |
| 767 | *frm++ = perr->perr_ttl; |
| 768 | *frm++ = perr->perr_ndests; |
| 769 | for (i = 0; i < perr->perr_ndests; i++) { |
| 770 | *frm++ = PERR_DFLAGS(i); |
| 771 | IEEE80211_ADDR_COPY(frm, PERR_DADDR(i)); |
| 772 | frm += 6; |
| 773 | ADDWORD(frm, PERR_DSEQ(i)); |
| 774 | if (PERR_DFLAGS(i) & IEEE80211_MESHPERR_FLAGS_AE) { |
| 775 | IEEE80211_ADDR_COPY(frm, PERR_EXTADDR(i)); |
| 776 | frm += 6; |
| 777 | } |
| 778 | ADDSHORT(frm, PERR_DRCODE(i)); |
| 779 | } |
| 780 | return frm; |
| 781 | } |
| 782 | #undef PERR_DFLAGS |
| 783 | #undef PERR_DADDR |
| 784 | #undef PERR_DSEQ |
| 785 | #undef PERR_EXTADDR |
| 786 | #undef PERR_DRCODE |
| 787 | |
| 788 | /* |
| 789 | * Add a Root Annoucement IE to a frame. |
| 790 | */ |
| 791 | static uint8_t * |
| 792 | hwmp_add_meshrann(uint8_t *frm, const struct ieee80211_meshrann_ie *rann) |
| 793 | { |
| 794 | *frm++ = IEEE80211_ELEMID_MESHRANN; |
| 795 | *frm++ = rann->rann_len; |
| 796 | *frm++ = rann->rann_flags; |
| 797 | *frm++ = rann->rann_hopcount; |
| 798 | *frm++ = rann->rann_ttl; |
| 799 | IEEE80211_ADDR_COPY(frm, rann->rann_addr); frm += 6; |
| 800 | ADDWORD(frm, rann->rann_seq); |
| 801 | ADDWORD(frm, rann->rann_interval); |
| 802 | ADDWORD(frm, rann->rann_metric); |
| 803 | return frm; |
| 804 | } |
| 805 | |
| 806 | static void |
| 807 | hwmp_rootmode_setup(struct ieee80211vap *vap) |
| 808 | { |
| 809 | struct ieee80211_hwmp_state *hs = vap->iv_hwmp; |
| 810 | struct ieee80211_mesh_state *ms = vap->iv_mesh; |
| 811 | |
| 812 | switch (hs->hs_rootmode) { |
| 813 | case IEEE80211_HWMP_ROOTMODE_DISABLED: |
| 814 | callout_drain(&hs->hs_roottimer); |
| 815 | ms->ms_flags &= ~IEEE80211_MESHFLAGS_ROOT; |
| 816 | break; |
| 817 | case IEEE80211_HWMP_ROOTMODE_NORMAL: |
| 818 | case IEEE80211_HWMP_ROOTMODE_PROACTIVE: |
| 819 | callout_reset(&hs->hs_roottimer, ieee80211_hwmp_rootint, |
| 820 | hwmp_rootmode_cb, vap); |
| 821 | ms->ms_flags |= IEEE80211_MESHFLAGS_ROOT; |
| 822 | break; |
| 823 | case IEEE80211_HWMP_ROOTMODE_RANN: |
| 824 | callout_reset(&hs->hs_roottimer, ieee80211_hwmp_rannint, |
| 825 | hwmp_rootmode_rann_cb, vap); |
| 826 | ms->ms_flags |= IEEE80211_MESHFLAGS_ROOT; |
| 827 | break; |
| 828 | } |
| 829 | } |
| 830 | |
| 831 | /* |
| 832 | * Send a broadcast Path Request to find all nodes on the mesh. We are |
| 833 | * called when the vap is configured as a HWMP root node. |
| 834 | */ |
| 835 | #define PREQ_TFLAGS(n) preq.preq_targets[n].target_flags |
| 836 | #define PREQ_TADDR(n) preq.preq_targets[n].target_addr |
| 837 | #define PREQ_TSEQ(n) preq.preq_targets[n].target_seq |
| 838 | static void |
| 839 | hwmp_rootmode_cb(void *arg) |
| 840 | { |
| 841 | struct ieee80211vap *vap = (struct ieee80211vap *)arg; |
| 842 | struct ieee80211_hwmp_state *hs = vap->iv_hwmp; |
| 843 | struct ieee80211_mesh_state *ms = vap->iv_mesh; |
| 844 | struct ieee80211_meshpreq_ie preq; |
| 845 | |
| 846 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, vap->iv_bss, |
| 847 | "%s", "send broadcast PREQ"); |
| 848 | |
| 849 | preq.preq_flags = 0; |
| 850 | if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) |
| 851 | preq.preq_flags |= IEEE80211_MESHPREQ_FLAGS_GATE; |
| 852 | if (hs->hs_rootmode == IEEE80211_HWMP_ROOTMODE_PROACTIVE) |
| 853 | preq.preq_flags |= IEEE80211_MESHPREQ_FLAGS_PP; |
| 854 | preq.preq_hopcount = 0; |
| 855 | preq.preq_ttl = ms->ms_ttl; |
| 856 | preq.preq_id = ++hs->hs_preqid; |
| 857 | IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr); |
| 858 | preq.preq_origseq = ++hs->hs_seq; |
| 859 | preq.preq_lifetime = ticks_to_msecs(ieee80211_hwmp_roottimeout); |
| 860 | preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL; |
| 861 | preq.preq_tcount = 1; |
| 862 | IEEE80211_ADDR_COPY(PREQ_TADDR(0), broadcastaddr); |
| 863 | PREQ_TFLAGS(0) = IEEE80211_MESHPREQ_TFLAGS_TO | |
| 864 | IEEE80211_MESHPREQ_TFLAGS_USN; |
| 865 | PREQ_TSEQ(0) = 0; |
| 866 | vap->iv_stats.is_hwmp_rootreqs++; |
| 867 | /* NB: we enforce rate check ourself */ |
| 868 | hwmp_send_preq(vap, broadcastaddr, &preq, NULL, NULL); |
| 869 | hwmp_rootmode_setup(vap); |
| 870 | } |
| 871 | #undef PREQ_TFLAGS |
| 872 | #undef PREQ_TADDR |
| 873 | #undef PREQ_TSEQ |
| 874 | |
| 875 | /* |
| 876 | * Send a Root Annoucement (RANN) to find all the nodes on the mesh. We are |
| 877 | * called when the vap is configured as a HWMP RANN root node. |
| 878 | */ |
| 879 | static void |
| 880 | hwmp_rootmode_rann_cb(void *arg) |
| 881 | { |
| 882 | struct ieee80211vap *vap = (struct ieee80211vap *)arg; |
| 883 | struct ieee80211_hwmp_state *hs = vap->iv_hwmp; |
| 884 | struct ieee80211_mesh_state *ms = vap->iv_mesh; |
| 885 | struct ieee80211_meshrann_ie rann; |
| 886 | |
| 887 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, vap->iv_bss, |
| 888 | "%s", "send broadcast RANN"); |
| 889 | |
| 890 | rann.rann_flags = 0; |
| 891 | if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) |
| 892 | rann.rann_flags |= IEEE80211_MESHFLAGS_GATE; |
| 893 | rann.rann_hopcount = 0; |
| 894 | rann.rann_ttl = ms->ms_ttl; |
| 895 | IEEE80211_ADDR_COPY(rann.rann_addr, vap->iv_myaddr); |
| 896 | rann.rann_seq = ++hs->hs_seq; |
| 897 | rann.rann_interval = ieee80211_hwmp_rannint; |
| 898 | rann.rann_metric = IEEE80211_MESHLMETRIC_INITIALVAL; |
| 899 | |
| 900 | vap->iv_stats.is_hwmp_rootrann++; |
| 901 | hwmp_send_rann(vap, broadcastaddr, &rann); |
| 902 | hwmp_rootmode_setup(vap); |
| 903 | } |
| 904 | |
| 905 | /* |
| 906 | * Update forwarding information to TA if metric improves. |
| 907 | */ |
| 908 | static void |
| 909 | hwmp_update_transmitter(struct ieee80211vap *vap, struct ieee80211_node *ni, |
| 910 | const char *hwmp_frame) |
| 911 | { |
| 912 | struct ieee80211_mesh_state *ms = vap->iv_mesh; |
| 913 | struct ieee80211_mesh_route *rttran = NULL; /* Transmitter */ |
| 914 | int metric = 0; |
| 915 | |
| 916 | rttran = ieee80211_mesh_rt_find(vap, ni->ni_macaddr); |
| 917 | if (rttran == NULL) { |
| 918 | rttran = ieee80211_mesh_rt_add(vap, ni->ni_macaddr); |
| 919 | if (rttran == NULL) { |
| 920 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 921 | "unable to add path to transmitter %6D of %s", |
| 922 | ni->ni_macaddr, ":", hwmp_frame); |
| 923 | vap->iv_stats.is_mesh_rtaddfailed++; |
| 924 | return; |
| 925 | } |
| 926 | } |
| 927 | metric = ms->ms_pmetric->mpm_metric(ni); |
| 928 | if (!(rttran->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) || |
| 929 | rttran->rt_metric > metric) |
| 930 | { |
| 931 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 932 | "%s path to transmiter %6D of %s, metric %d:%d", |
| 933 | rttran->rt_flags & IEEE80211_MESHRT_FLAGS_VALID ? |
| 934 | "prefer" : "update", ni->ni_macaddr, ":", hwmp_frame, |
| 935 | rttran->rt_metric, metric); |
| 936 | IEEE80211_ADDR_COPY(rttran->rt_nexthop, ni->ni_macaddr); |
| 937 | rttran->rt_metric = metric; |
| 938 | rttran->rt_nhops = 1; |
| 939 | ieee80211_mesh_rt_update(rttran, ms->ms_ppath->mpp_inact); |
| 940 | rttran->rt_flags = IEEE80211_MESHRT_FLAGS_VALID; |
| 941 | } |
| 942 | } |
| 943 | |
| 944 | #define PREQ_TFLAGS(n) preq->preq_targets[n].target_flags |
| 945 | #define PREQ_TADDR(n) preq->preq_targets[n].target_addr |
| 946 | #define PREQ_TSEQ(n) preq->preq_targets[n].target_seq |
| 947 | static void |
| 948 | hwmp_recv_preq(struct ieee80211vap *vap, struct ieee80211_node *ni, |
| 949 | const struct ieee80211_frame *wh, const struct ieee80211_meshpreq_ie *preq) |
| 950 | { |
| 951 | struct ieee80211_mesh_state *ms = vap->iv_mesh; |
| 952 | struct ieee80211_mesh_route *rtorig = NULL; |
| 953 | struct ieee80211_mesh_route *rtorig_ext = NULL; |
| 954 | struct ieee80211_mesh_route *rttarg = NULL; |
| 955 | struct ieee80211_hwmp_route *hrorig = NULL; |
| 956 | struct ieee80211_hwmp_route *hrtarg = NULL; |
| 957 | struct ieee80211_hwmp_state *hs = vap->iv_hwmp; |
| 958 | struct ieee80211_meshprep_ie prep; |
| 959 | ieee80211_hwmp_seq preqid; /* last seen preqid for orig */ |
| 960 | uint32_t metric = 0; |
| 961 | |
| 962 | /* |
| 963 | * Ignore PREQs from us. Could happen because someone forward it |
| 964 | * back to us. |
| 965 | */ |
| 966 | if (IEEE80211_ADDR_EQ(vap->iv_myaddr, preq->preq_origaddr)) |
| 967 | return; |
| 968 | |
| 969 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 970 | "received PREQ, orig %6D, targ(0) %6D", preq->preq_origaddr, ":", |
| 971 | PREQ_TADDR(0), ":"); |
| 972 | |
| 973 | /* |
| 974 | * Acceptance criteria: (if the PREQ is not for us or not broadcast, |
| 975 | * or an external mac address not proxied by us), |
| 976 | * AND forwarding is disabled, discard this PREQ. |
| 977 | */ |
| 978 | rttarg = ieee80211_mesh_rt_find(vap, PREQ_TADDR(0)); |
| 979 | if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD) && |
| 980 | (!IEEE80211_ADDR_EQ(vap->iv_myaddr, PREQ_TADDR(0)) || |
| 981 | !IEEE80211_IS_MULTICAST(PREQ_TADDR(0)) || |
| 982 | (rttarg != NULL && |
| 983 | rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && |
| 984 | IEEE80211_ADDR_EQ(vap->iv_myaddr, rttarg->rt_mesh_gate)))) { |
| 985 | IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_HWMP, |
| 986 | preq->preq_origaddr, NULL, "%s", "not accepting PREQ"); |
| 987 | return; |
| 988 | } |
| 989 | /* |
| 990 | * Acceptance criteria: if unicast addressed |
| 991 | * AND no valid forwarding for Target of PREQ, discard this PREQ. |
| 992 | */ |
| 993 | if(rttarg != NULL) |
| 994 | hrtarg = IEEE80211_MESH_ROUTE_PRIV(rttarg, |
| 995 | struct ieee80211_hwmp_route); |
| 996 | /* Address mode: ucast */ |
| 997 | if(preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AM && |
| 998 | rttarg == NULL && |
| 999 | !IEEE80211_ADDR_EQ(vap->iv_myaddr, PREQ_TADDR(0))) { |
| 1000 | IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_HWMP, |
| 1001 | preq->preq_origaddr, NULL, |
| 1002 | "unicast addressed PREQ of unknown target %6D", |
| 1003 | PREQ_TADDR(0), ":"); |
| 1004 | return; |
| 1005 | } |
| 1006 | |
| 1007 | /* PREQ ACCEPTED */ |
| 1008 | |
| 1009 | rtorig = ieee80211_mesh_rt_find(vap, preq->preq_origaddr); |
| 1010 | if (rtorig == NULL) { |
| 1011 | rtorig = ieee80211_mesh_rt_add(vap, preq->preq_origaddr); |
| 1012 | if (rtorig == NULL) { |
| 1013 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1014 | "unable to add orig path to %6D", |
| 1015 | preq->preq_origaddr, ":"); |
| 1016 | vap->iv_stats.is_mesh_rtaddfailed++; |
| 1017 | return; |
| 1018 | } |
| 1019 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1020 | "adding originator %6D", preq->preq_origaddr, ":"); |
| 1021 | } |
| 1022 | hrorig = IEEE80211_MESH_ROUTE_PRIV(rtorig, struct ieee80211_hwmp_route); |
| 1023 | |
| 1024 | /* record last seen preqid */ |
| 1025 | preqid = hrorig->hr_preqid; |
| 1026 | hrorig->hr_preqid = HWMP_SEQ_MAX(hrorig->hr_preqid, preq->preq_id); |
| 1027 | |
| 1028 | /* Data creation and update of forwarding information |
| 1029 | * according to Table 11C-8 for originator mesh STA. |
| 1030 | */ |
| 1031 | metric = preq->preq_metric + ms->ms_pmetric->mpm_metric(ni); |
| 1032 | if (HWMP_SEQ_GT(preq->preq_origseq, hrorig->hr_seq) || |
| 1033 | (HWMP_SEQ_EQ(preq->preq_origseq, hrorig->hr_seq) && |
| 1034 | metric < rtorig->rt_metric)) { |
| 1035 | hrorig->hr_seq = preq->preq_origseq; |
| 1036 | IEEE80211_ADDR_COPY(rtorig->rt_nexthop, wh->i_addr2); |
| 1037 | rtorig->rt_metric = metric; |
| 1038 | rtorig->rt_nhops = preq->preq_hopcount + 1; |
| 1039 | ieee80211_mesh_rt_update(rtorig, preq->preq_lifetime); |
| 1040 | /* Path to orig is valid now. |
| 1041 | * NB: we know it can't be Proxy, and if it is GATE |
| 1042 | * it will be marked below. |
| 1043 | */ |
| 1044 | rtorig->rt_flags = IEEE80211_MESHRT_FLAGS_VALID; |
| 1045 | } else if ((hrtarg != NULL && |
| 1046 | !HWMP_SEQ_EQ(hrtarg->hr_seq, PREQ_TSEQ(0))) || |
| 1047 | (rtorig->rt_flags & IEEE80211_MESHRT_FLAGS_VALID && |
| 1048 | preqid >= preq->preq_id)) { |
| 1049 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1050 | "discard PREQ from %6D, old seqno %u <= %u," |
| 1051 | " or old preqid %u < %u", |
| 1052 | preq->preq_origaddr, ":", |
| 1053 | preq->preq_origseq, hrorig->hr_seq, |
| 1054 | preq->preq_id, preqid); |
| 1055 | return; |
| 1056 | } |
| 1057 | |
| 1058 | /* Update forwarding information to TA if metric improves. */ |
| 1059 | hwmp_update_transmitter(vap, ni, "PREQ"); |
| 1060 | |
| 1061 | /* |
| 1062 | * Check if the PREQ is addressed to us. |
| 1063 | * or a Proxy currently gated by us. |
| 1064 | */ |
| 1065 | if (IEEE80211_ADDR_EQ(vap->iv_myaddr, PREQ_TADDR(0)) || |
| 1066 | (ms->ms_flags & IEEE80211_MESHFLAGS_GATE && |
| 1067 | rttarg != NULL && |
| 1068 | IEEE80211_ADDR_EQ(vap->iv_myaddr, rttarg->rt_mesh_gate) && |
| 1069 | rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && |
| 1070 | rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_VALID)) { |
| 1071 | /* |
| 1072 | * When we are the target we shall update our own HWMP seq |
| 1073 | * number with max of (current and preq->seq) + 1 |
| 1074 | */ |
| 1075 | hs->hs_seq = HWMP_SEQ_MAX(hs->hs_seq, PREQ_TSEQ(0)) + 1; |
| 1076 | |
| 1077 | prep.prep_flags = 0; |
| 1078 | prep.prep_hopcount = 0; |
| 1079 | prep.prep_metric = IEEE80211_MESHLMETRIC_INITIALVAL; |
| 1080 | IEEE80211_ADDR_COPY(prep.prep_targetaddr, vap->iv_myaddr); |
| 1081 | if (rttarg != NULL && /* if NULL it means we are the target */ |
| 1082 | rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) { |
| 1083 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1084 | "reply for proxy %6D", rttarg->rt_dest, ":"); |
| 1085 | prep.prep_flags |= IEEE80211_MESHPREP_FLAGS_AE; |
| 1086 | IEEE80211_ADDR_COPY(prep.prep_target_ext_addr, |
| 1087 | rttarg->rt_dest); |
| 1088 | /* update proxy seqno to HWMP seqno */ |
| 1089 | rttarg->rt_ext_seq = hs->hs_seq; |
| 1090 | prep.prep_hopcount = rttarg->rt_nhops; |
| 1091 | prep.prep_metric = rttarg->rt_metric; |
| 1092 | IEEE80211_ADDR_COPY(prep.prep_targetaddr, rttarg->rt_mesh_gate); |
| 1093 | } |
| 1094 | /* |
| 1095 | * Build and send a PREP frame. |
| 1096 | */ |
| 1097 | prep.prep_ttl = ms->ms_ttl; |
| 1098 | prep.prep_targetseq = hs->hs_seq; |
| 1099 | prep.prep_lifetime = preq->preq_lifetime; |
| 1100 | IEEE80211_ADDR_COPY(prep.prep_origaddr, preq->preq_origaddr); |
| 1101 | prep.prep_origseq = preq->preq_origseq; |
| 1102 | |
| 1103 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1104 | "reply to %6D", preq->preq_origaddr, ":"); |
| 1105 | hwmp_send_prep(vap, wh->i_addr2, &prep); |
| 1106 | return; |
| 1107 | } |
| 1108 | /* we may update our proxy information for the orig external */ |
| 1109 | else if (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE) { |
| 1110 | rtorig_ext = |
| 1111 | ieee80211_mesh_rt_find(vap, preq->preq_orig_ext_addr); |
| 1112 | if (rtorig_ext == NULL) { |
| 1113 | rtorig_ext = ieee80211_mesh_rt_add(vap, |
| 1114 | preq->preq_orig_ext_addr); |
| 1115 | if (rtorig_ext == NULL) { |
| 1116 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1117 | "unable to add orig ext proxy to %6D", |
| 1118 | preq->preq_orig_ext_addr, ":"); |
| 1119 | vap->iv_stats.is_mesh_rtaddfailed++; |
| 1120 | return; |
| 1121 | } |
| 1122 | IEEE80211_ADDR_COPY(rtorig_ext->rt_mesh_gate, |
| 1123 | preq->preq_origaddr); |
| 1124 | } |
| 1125 | rtorig_ext->rt_ext_seq = preq->preq_origseq; |
| 1126 | ieee80211_mesh_rt_update(rtorig_ext, preq->preq_lifetime); |
| 1127 | } |
| 1128 | /* |
| 1129 | * Proactive PREQ: reply with a proactive PREP to the |
| 1130 | * root STA if requested. |
| 1131 | */ |
| 1132 | if (IEEE80211_ADDR_EQ(PREQ_TADDR(0), broadcastaddr) && |
| 1133 | (PREQ_TFLAGS(0) & IEEE80211_MESHPREQ_TFLAGS_TO)) { |
| 1134 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1135 | "root mesh station @ %6D", preq->preq_origaddr, ":"); |
| 1136 | |
| 1137 | /* Check if root is a mesh gate, mark it */ |
| 1138 | if (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_GATE) { |
| 1139 | struct ieee80211_mesh_gate_route *gr; |
| 1140 | |
| 1141 | rtorig->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; |
| 1142 | gr = ieee80211_mesh_mark_gate(vap, preq->preq_origaddr, |
| 1143 | rtorig); |
| 1144 | gr->gr_lastseq = 0; /* NOT GANN */ |
| 1145 | } |
| 1146 | |
| 1147 | /* |
| 1148 | * Reply with a PREP if we don't have a path to the root |
| 1149 | * or if the root sent us a proactive PREQ. |
| 1150 | */ |
| 1151 | if ((rtorig->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 || |
| 1152 | (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_PP)) { |
| 1153 | prep.prep_flags = 0; |
| 1154 | prep.prep_hopcount = 0; |
| 1155 | prep.prep_ttl = ms->ms_ttl; |
| 1156 | IEEE80211_ADDR_COPY(prep.prep_origaddr, |
| 1157 | preq->preq_origaddr); |
| 1158 | prep.prep_origseq = preq->preq_origseq; |
| 1159 | prep.prep_lifetime = preq->preq_lifetime; |
| 1160 | prep.prep_metric = IEEE80211_MESHLMETRIC_INITIALVAL; |
| 1161 | IEEE80211_ADDR_COPY(prep.prep_targetaddr, |
| 1162 | vap->iv_myaddr); |
| 1163 | prep.prep_targetseq = ++hs->hs_seq; |
| 1164 | hwmp_send_prep(vap, rtorig->rt_nexthop, &prep); |
| 1165 | } |
| 1166 | } |
| 1167 | |
| 1168 | /* |
| 1169 | * Forwarding and Intermediate reply for PREQs with 1 target. |
| 1170 | */ |
| 1171 | if ((preq->preq_tcount == 1) && (preq->preq_ttl > 1) && |
| 1172 | (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) { |
| 1173 | struct ieee80211_meshpreq_ie ppreq; /* propagated PREQ */ |
| 1174 | |
| 1175 | memcpy(&ppreq, preq, sizeof(ppreq)); |
| 1176 | |
| 1177 | /* |
| 1178 | * We have a valid route to this node. |
| 1179 | * NB: if target is proxy dont reply. |
| 1180 | */ |
| 1181 | if (rttarg != NULL && |
| 1182 | rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_VALID && |
| 1183 | !(rttarg->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) { |
| 1184 | /* |
| 1185 | * Check if we can send an intermediate Path Reply, |
| 1186 | * i.e., Target Only bit is not set and target is not |
| 1187 | * the MAC broadcast address. |
| 1188 | */ |
| 1189 | if (!(PREQ_TFLAGS(0) & IEEE80211_MESHPREQ_TFLAGS_TO) && |
| 1190 | !IEEE80211_ADDR_EQ(PREQ_TADDR(0), broadcastaddr)) { |
| 1191 | struct ieee80211_meshprep_ie prep; |
| 1192 | |
| 1193 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1194 | "intermediate reply for PREQ from %6D", |
| 1195 | preq->preq_origaddr, ":"); |
| 1196 | prep.prep_flags = 0; |
| 1197 | prep.prep_hopcount = rttarg->rt_nhops; |
| 1198 | prep.prep_ttl = ms->ms_ttl; |
| 1199 | IEEE80211_ADDR_COPY(&prep.prep_targetaddr, |
| 1200 | PREQ_TADDR(0)); |
| 1201 | prep.prep_targetseq = hrtarg->hr_seq; |
| 1202 | prep.prep_lifetime = preq->preq_lifetime; |
| 1203 | prep.prep_metric =rttarg->rt_metric; |
| 1204 | IEEE80211_ADDR_COPY(&prep.prep_origaddr, |
| 1205 | preq->preq_origaddr); |
| 1206 | prep.prep_origseq = hrorig->hr_seq; |
| 1207 | hwmp_send_prep(vap, rtorig->rt_nexthop, &prep); |
| 1208 | |
| 1209 | /* |
| 1210 | * Set TO and unset RF bits because we have |
| 1211 | * sent a PREP. |
| 1212 | */ |
| 1213 | ppreq.preq_targets[0].target_flags |= |
| 1214 | IEEE80211_MESHPREQ_TFLAGS_TO; |
| 1215 | } |
| 1216 | } |
| 1217 | |
| 1218 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1219 | "forward PREQ from %6D", |
| 1220 | preq->preq_origaddr, ":"); |
| 1221 | ppreq.preq_hopcount += 1; |
| 1222 | ppreq.preq_ttl -= 1; |
| 1223 | ppreq.preq_metric += ms->ms_pmetric->mpm_metric(ni); |
| 1224 | |
| 1225 | /* don't do PREQ ratecheck when we propagate */ |
| 1226 | hwmp_send_preq(vap, broadcastaddr, &ppreq, NULL, NULL); |
| 1227 | } |
| 1228 | } |
| 1229 | #undef PREQ_TFLAGS |
| 1230 | #undef PREQ_TADDR |
| 1231 | #undef PREQ_TSEQ |
| 1232 | |
| 1233 | static int |
| 1234 | hwmp_send_preq(struct ieee80211vap *vap, |
| 1235 | const uint8_t da[IEEE80211_ADDR_LEN], |
| 1236 | struct ieee80211_meshpreq_ie *preq, |
| 1237 | struct timeval *last, struct timeval *minint) |
| 1238 | { |
| 1239 | |
| 1240 | /* |
| 1241 | * Enforce PREQ interval. |
| 1242 | * NB: Proactive ROOT PREQs rate is handled by cb task. |
| 1243 | */ |
| 1244 | if (last != NULL && minint != NULL) { |
| 1245 | if (ratecheck(last, minint) == 0) |
| 1246 | return EALREADY; /* XXX: we should postpone */ |
| 1247 | getmicrouptime(last); |
| 1248 | } |
| 1249 | |
| 1250 | /* |
| 1251 | * mesh preq action frame format |
| 1252 | * [6] da |
| 1253 | * [6] sa |
| 1254 | * [6] addr3 = sa |
| 1255 | * [1] action |
| 1256 | * [1] category |
| 1257 | * [tlv] mesh path request |
| 1258 | */ |
| 1259 | preq->preq_ie = IEEE80211_ELEMID_MESHPREQ; |
| 1260 | preq->preq_len = (preq->preq_flags & IEEE80211_MESHPREQ_FLAGS_AE ? |
| 1261 | IEEE80211_MESHPREQ_BASE_SZ_AE : IEEE80211_MESHPREQ_BASE_SZ) + |
| 1262 | preq->preq_tcount * IEEE80211_MESHPREQ_TRGT_SZ; |
| 1263 | return hwmp_send_action(vap, da, (uint8_t *)preq, preq->preq_len+2); |
| 1264 | } |
| 1265 | |
| 1266 | static void |
| 1267 | hwmp_recv_prep(struct ieee80211vap *vap, struct ieee80211_node *ni, |
| 1268 | const struct ieee80211_frame *wh, const struct ieee80211_meshprep_ie *prep) |
| 1269 | { |
| 1270 | #define IS_PROXY(rt) (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) |
| 1271 | #define PROXIED_BY_US(rt) \ |
| 1272 | (IEEE80211_ADDR_EQ(vap->iv_myaddr, rt->rt_mesh_gate)) |
| 1273 | struct ieee80211_mesh_state *ms = vap->iv_mesh; |
| 1274 | struct ieee80211_hwmp_state *hs = vap->iv_hwmp; |
| 1275 | struct ieee80211_mesh_route *rt = NULL; |
| 1276 | struct ieee80211_mesh_route *rtorig = NULL; |
| 1277 | struct ieee80211_mesh_route *rtext = NULL; |
| 1278 | struct ieee80211_hwmp_route *hr; |
| 1279 | struct ieee80211com *ic = vap->iv_ic; |
| 1280 | struct mbuf *m, *next; |
| 1281 | uint32_t metric = 0; |
| 1282 | const uint8_t *addr; |
| 1283 | |
| 1284 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1285 | "received PREP, orig %6D, targ %6D", prep->prep_origaddr, ":", |
| 1286 | prep->prep_targetaddr, ":"); |
| 1287 | |
| 1288 | /* |
| 1289 | * Acceptance criteria: (If the corresponding PREP was not generated |
| 1290 | * by us OR not generated by an external mac that is not proxied by us) |
| 1291 | * AND forwarding is disabled, discard this PREP. |
| 1292 | */ |
| 1293 | rtorig = ieee80211_mesh_rt_find(vap, prep->prep_origaddr); |
| 1294 | if ((!IEEE80211_ADDR_EQ(vap->iv_myaddr, prep->prep_origaddr) || |
| 1295 | (rtorig != NULL && IS_PROXY(rtorig) && !PROXIED_BY_US(rtorig))) && |
| 1296 | !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)){ |
| 1297 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1298 | "discard PREP, orig(%6D) not proxied or generated by us", |
| 1299 | prep->prep_origaddr, ":"); |
| 1300 | return; |
| 1301 | } |
| 1302 | |
| 1303 | /* PREP ACCEPTED */ |
| 1304 | |
| 1305 | /* |
| 1306 | * If accepted shall create or update the active forwarding information |
| 1307 | * it maintains for the target mesh STA of the PREP (according to the |
| 1308 | * rules defined in 13.10.8.4). If the conditions for creating or |
| 1309 | * updating the forwarding information have not been met in those |
| 1310 | * rules, no further steps are applied to the PREP. |
| 1311 | */ |
| 1312 | rt = ieee80211_mesh_rt_find(vap, prep->prep_targetaddr); |
| 1313 | if (rt == NULL) { |
| 1314 | rt = ieee80211_mesh_rt_add(vap, prep->prep_targetaddr); |
| 1315 | if (rt == NULL) { |
| 1316 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1317 | "unable to add PREP path to %6D", |
| 1318 | prep->prep_targetaddr, ":"); |
| 1319 | vap->iv_stats.is_mesh_rtaddfailed++; |
| 1320 | return; |
| 1321 | } |
| 1322 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1323 | "adding target %6D", prep->prep_targetaddr, ":"); |
| 1324 | } |
| 1325 | hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); |
| 1326 | /* update path metric */ |
| 1327 | metric = prep->prep_metric + ms->ms_pmetric->mpm_metric(ni); |
| 1328 | if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID)) { |
| 1329 | if (HWMP_SEQ_LT(prep->prep_targetseq, hr->hr_seq)) { |
| 1330 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1331 | "discard PREP from %6D, old seq no %u < %u", |
| 1332 | prep->prep_targetaddr, ":", |
| 1333 | prep->prep_targetseq, hr->hr_seq); |
| 1334 | return; |
| 1335 | } else if (HWMP_SEQ_LEQ(prep->prep_targetseq, hr->hr_seq) && |
| 1336 | metric > rt->rt_metric) { |
| 1337 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1338 | "discard PREP from %6D, new metric %u > %u", |
| 1339 | prep->prep_targetaddr, ":", |
| 1340 | metric, rt->rt_metric); |
| 1341 | return; |
| 1342 | } |
| 1343 | } |
| 1344 | |
| 1345 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1346 | "%s path to %6D, hopcount %d:%d metric %d:%d", |
| 1347 | rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID ? |
| 1348 | "prefer" : "update", |
| 1349 | prep->prep_targetaddr, ":", |
| 1350 | rt->rt_nhops, prep->prep_hopcount + 1, |
| 1351 | rt->rt_metric, metric); |
| 1352 | |
| 1353 | hr->hr_seq = prep->prep_targetseq; |
| 1354 | hr->hr_preqretries = 0; |
| 1355 | IEEE80211_ADDR_COPY(rt->rt_nexthop, ni->ni_macaddr); |
| 1356 | rt->rt_metric = metric; |
| 1357 | rt->rt_nhops = prep->prep_hopcount + 1; |
| 1358 | ieee80211_mesh_rt_update(rt, prep->prep_lifetime); |
| 1359 | if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) { |
| 1360 | /* discovery complete */ |
| 1361 | rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_DISCOVER; |
| 1362 | } |
| 1363 | rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID; /* mark valid */ |
| 1364 | |
| 1365 | /* Update forwarding information to TA if metric improves */ |
| 1366 | hwmp_update_transmitter(vap, ni, "PREP"); |
| 1367 | |
| 1368 | /* |
| 1369 | * If it's NOT for us, propagate the PREP |
| 1370 | */ |
| 1371 | if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, prep->prep_origaddr) && |
| 1372 | prep->prep_ttl > 1 && |
| 1373 | prep->prep_hopcount < hs->hs_maxhops) { |
| 1374 | struct ieee80211_meshprep_ie pprep; /* propagated PREP */ |
| 1375 | /* |
| 1376 | * NB: We should already have setup the path to orig |
| 1377 | * mesh STA when we propagated PREQ to target mesh STA, |
| 1378 | * no PREP is generated without a corresponding PREQ. |
| 1379 | * XXX: for now just ignore. |
| 1380 | */ |
| 1381 | if (rtorig == NULL) { |
| 1382 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1383 | "received PREP for an unknown orig(%6D)", |
| 1384 | prep->prep_origaddr, ":"); |
| 1385 | return; |
| 1386 | } |
| 1387 | |
| 1388 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1389 | "propagate PREP from %6D", |
| 1390 | prep->prep_targetaddr, ":"); |
| 1391 | |
| 1392 | memcpy(&pprep, prep, sizeof(pprep)); |
| 1393 | pprep.prep_hopcount += 1; |
| 1394 | pprep.prep_ttl -= 1; |
| 1395 | pprep.prep_metric += ms->ms_pmetric->mpm_metric(ni); |
| 1396 | hwmp_send_prep(vap, rtorig->rt_nexthop, &pprep); |
| 1397 | |
| 1398 | /* precursor list for the Target Mesh STA Address is updated */ |
| 1399 | } |
| 1400 | |
| 1401 | /* |
| 1402 | * Check if we received a PREP w/ AE and store target external address. |
| 1403 | * We may store target external address if recevied PREP w/ AE |
| 1404 | * and we are not final destination |
| 1405 | */ |
| 1406 | if (prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE) { |
| 1407 | rtext = ieee80211_mesh_rt_find(vap, |
| 1408 | prep->prep_target_ext_addr); |
| 1409 | if (rtext == NULL) { |
| 1410 | rtext = ieee80211_mesh_rt_add(vap, |
| 1411 | prep->prep_target_ext_addr); |
| 1412 | if (rtext == NULL) { |
| 1413 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1414 | "unable to add PREP path to proxy %6D", |
| 1415 | prep->prep_targetaddr, ":"); |
| 1416 | vap->iv_stats.is_mesh_rtaddfailed++; |
| 1417 | return; |
| 1418 | } |
| 1419 | } |
| 1420 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1421 | "%s path to %6D, hopcount %d:%d metric %d:%d", |
| 1422 | rtext->rt_flags & IEEE80211_MESHRT_FLAGS_VALID ? |
| 1423 | "prefer" : "update", |
| 1424 | prep->prep_target_ext_addr, ":", |
| 1425 | rtext->rt_nhops, prep->prep_hopcount + 1, |
| 1426 | rtext->rt_metric, metric); |
| 1427 | |
| 1428 | rtext->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY | |
| 1429 | IEEE80211_MESHRT_FLAGS_VALID; |
| 1430 | IEEE80211_ADDR_COPY(rtext->rt_dest, |
| 1431 | prep->prep_target_ext_addr); |
| 1432 | IEEE80211_ADDR_COPY(rtext->rt_mesh_gate, |
| 1433 | prep->prep_targetaddr); |
| 1434 | IEEE80211_ADDR_COPY(rtext->rt_nexthop, wh->i_addr2); |
| 1435 | rtext->rt_metric = metric; |
| 1436 | rtext->rt_lifetime = prep->prep_lifetime; |
| 1437 | rtext->rt_nhops = prep->prep_hopcount + 1; |
| 1438 | rtext->rt_ext_seq = prep->prep_origseq; /* new proxy seq */ |
| 1439 | /* |
| 1440 | * XXX: proxy entries have no HWMP priv data, |
| 1441 | * nullify them to be sure? |
| 1442 | */ |
| 1443 | } |
| 1444 | /* |
| 1445 | * Check for frames queued awaiting path discovery. |
| 1446 | * XXX probably can tell exactly and avoid remove call |
| 1447 | * NB: hash may have false matches, if so they will get |
| 1448 | * stuck back on the stageq because there won't be |
| 1449 | * a path. |
| 1450 | */ |
| 1451 | addr = prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE ? |
| 1452 | prep->prep_target_ext_addr : prep->prep_targetaddr; |
| 1453 | m = ieee80211_ageq_remove(&ic->ic_stageq, |
| 1454 | (struct ieee80211_node *)(uintptr_t) |
| 1455 | ieee80211_mac_hash(ic, addr)); /* either dest or ext_dest */ |
| 1456 | |
| 1457 | /* |
| 1458 | * All frames in the stageq here should be non-M_ENCAP; or things |
| 1459 | * will get very unhappy. |
| 1460 | */ |
| 1461 | for (; m != NULL; m = next) { |
| 1462 | next = m->m_nextpkt; |
| 1463 | m->m_nextpkt = NULL; |
| 1464 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1465 | "flush queued frame %p len %d", m, m->m_pkthdr.len); |
| 1466 | /* |
| 1467 | * If the mbuf has M_ENCAP set, ensure we free it. |
| 1468 | * Note that after if_transmit() is called, m is invalid. |
| 1469 | */ |
| 1470 | (void) ieee80211_vap_xmitpkt(vap, m); |
| 1471 | } |
| 1472 | #undef IS_PROXY |
| 1473 | #undef PROXIED_BY_US |
| 1474 | } |
| 1475 | |
| 1476 | static int |
| 1477 | hwmp_send_prep(struct ieee80211vap *vap, |
| 1478 | const uint8_t da[IEEE80211_ADDR_LEN], |
| 1479 | struct ieee80211_meshprep_ie *prep) |
| 1480 | { |
| 1481 | /* NB: there's no PREP minimum interval. */ |
| 1482 | |
| 1483 | /* |
| 1484 | * mesh prep action frame format |
| 1485 | * [6] da |
| 1486 | * [6] sa |
| 1487 | * [6] addr3 = sa |
| 1488 | * [1] action |
| 1489 | * [1] category |
| 1490 | * [tlv] mesh path reply |
| 1491 | */ |
| 1492 | prep->prep_ie = IEEE80211_ELEMID_MESHPREP; |
| 1493 | prep->prep_len = prep->prep_flags & IEEE80211_MESHPREP_FLAGS_AE ? |
| 1494 | IEEE80211_MESHPREP_BASE_SZ_AE : IEEE80211_MESHPREP_BASE_SZ; |
| 1495 | return hwmp_send_action(vap, da, (uint8_t *)prep, prep->prep_len + 2); |
| 1496 | } |
| 1497 | |
| 1498 | #define PERR_DFLAGS(n) perr.perr_dests[n].dest_flags |
| 1499 | #define PERR_DADDR(n) perr.perr_dests[n].dest_addr |
| 1500 | #define PERR_DSEQ(n) perr.perr_dests[n].dest_seq |
| 1501 | #define PERR_DRCODE(n) perr.perr_dests[n].dest_rcode |
| 1502 | static void |
| 1503 | hwmp_peerdown(struct ieee80211_node *ni) |
| 1504 | { |
| 1505 | struct ieee80211vap *vap = ni->ni_vap; |
| 1506 | struct ieee80211_mesh_state *ms = vap->iv_mesh; |
| 1507 | struct ieee80211_meshperr_ie perr; |
| 1508 | struct ieee80211_mesh_route *rt; |
| 1509 | struct ieee80211_hwmp_route *hr; |
| 1510 | |
| 1511 | rt = ieee80211_mesh_rt_find(vap, ni->ni_macaddr); |
| 1512 | if (rt == NULL) |
| 1513 | return; |
| 1514 | hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); |
| 1515 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1516 | "%s", "delete route entry"); |
| 1517 | perr.perr_ttl = ms->ms_ttl; |
| 1518 | perr.perr_ndests = 1; |
| 1519 | PERR_DFLAGS(0) = 0; |
| 1520 | if (hr->hr_seq == 0) |
| 1521 | PERR_DFLAGS(0) |= IEEE80211_MESHPERR_DFLAGS_USN; |
| 1522 | PERR_DFLAGS(0) |= IEEE80211_MESHPERR_DFLAGS_RC; |
| 1523 | IEEE80211_ADDR_COPY(PERR_DADDR(0), rt->rt_dest); |
| 1524 | PERR_DSEQ(0) = ++hr->hr_seq; |
| 1525 | PERR_DRCODE(0) = IEEE80211_REASON_MESH_PERR_DEST_UNREACH; |
| 1526 | /* NB: flush everything passing through peer */ |
| 1527 | ieee80211_mesh_rt_flush_peer(vap, ni->ni_macaddr); |
| 1528 | hwmp_send_perr(vap, broadcastaddr, &perr); |
| 1529 | } |
| 1530 | #undef PERR_DFLAGS |
| 1531 | #undef PERR_DADDR |
| 1532 | #undef PERR_DSEQ |
| 1533 | #undef PERR_DRCODE |
| 1534 | |
| 1535 | #define PERR_DFLAGS(n) perr->perr_dests[n].dest_flags |
| 1536 | #define PERR_DADDR(n) perr->perr_dests[n].dest_addr |
| 1537 | #define PERR_DSEQ(n) perr->perr_dests[n].dest_seq |
| 1538 | #define PERR_DEXTADDR(n) perr->perr_dests[n].dest_ext_addr |
| 1539 | #define PERR_DRCODE(n) perr->perr_dests[n].dest_rcode |
| 1540 | static void |
| 1541 | hwmp_recv_perr(struct ieee80211vap *vap, struct ieee80211_node *ni, |
| 1542 | const struct ieee80211_frame *wh, const struct ieee80211_meshperr_ie *perr) |
| 1543 | { |
| 1544 | struct ieee80211_mesh_state *ms = vap->iv_mesh; |
| 1545 | struct ieee80211_mesh_route *rt = NULL; |
| 1546 | struct ieee80211_mesh_route *rt_ext = NULL; |
| 1547 | struct ieee80211_hwmp_route *hr; |
| 1548 | struct ieee80211_meshperr_ie *pperr = NULL; |
| 1549 | int i, j = 0, forward = 0; |
| 1550 | |
| 1551 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1552 | "received PERR from %6D", wh->i_addr2, ":"); |
| 1553 | |
| 1554 | /* |
| 1555 | * if forwarding is true, prepare pperr |
| 1556 | */ |
| 1557 | if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) { |
| 1558 | forward = 1; |
| 1559 | pperr = kmalloc(sizeof(*perr) + 31*sizeof(*perr->perr_dests), |
| 1560 | M_80211_MESH_PERR, M_INTWAIT); /* XXX: magic number, 32 err dests */ |
| 1561 | } |
| 1562 | |
| 1563 | /* |
| 1564 | * Acceptance criteria: check if we have forwarding information |
| 1565 | * stored about destination, and that nexthop == TA of this PERR. |
| 1566 | * NB: we also build a new PERR to propagate in case we should forward. |
| 1567 | */ |
| 1568 | for (i = 0; i < perr->perr_ndests; i++) { |
| 1569 | rt = ieee80211_mesh_rt_find(vap, PERR_DADDR(i)); |
| 1570 | if (rt == NULL) |
| 1571 | continue; |
| 1572 | if (!IEEE80211_ADDR_EQ(rt->rt_nexthop, wh->i_addr2)) |
| 1573 | continue; |
| 1574 | |
| 1575 | /* found and accepted a PERR ndest element, process it... */ |
| 1576 | if (forward) |
| 1577 | memcpy(&pperr->perr_dests[j], &perr->perr_dests[i], |
| 1578 | sizeof(*perr->perr_dests)); |
| 1579 | hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); |
| 1580 | switch(PERR_DFLAGS(i)) { |
| 1581 | case (IEEE80211_REASON_MESH_PERR_NO_FI): |
| 1582 | if (PERR_DSEQ(i) == 0) { |
| 1583 | hr->hr_seq++; |
| 1584 | if (forward) { |
| 1585 | pperr->perr_dests[j].dest_seq = |
| 1586 | hr->hr_seq; |
| 1587 | } |
| 1588 | } else { |
| 1589 | hr->hr_seq = PERR_DSEQ(i); |
| 1590 | } |
| 1591 | rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; |
| 1592 | j++; |
| 1593 | break; |
| 1594 | case (IEEE80211_REASON_MESH_PERR_DEST_UNREACH): |
| 1595 | if(HWMP_SEQ_GT(PERR_DSEQ(i), hr->hr_seq)) { |
| 1596 | hr->hr_seq = PERR_DSEQ(i); |
| 1597 | rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID; |
| 1598 | j++; |
| 1599 | } |
| 1600 | break; |
| 1601 | case (IEEE80211_REASON_MESH_PERR_NO_PROXY): |
| 1602 | rt_ext = ieee80211_mesh_rt_find(vap, PERR_DEXTADDR(i)); |
| 1603 | if (rt_ext != NULL) { |
| 1604 | rt_ext->rt_flags &= |
| 1605 | ~IEEE80211_MESHRT_FLAGS_VALID; |
| 1606 | j++; |
| 1607 | } |
| 1608 | break; |
| 1609 | default: |
| 1610 | IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, |
| 1611 | "PERR, unknown reason code %u\n", PERR_DFLAGS(i)); |
| 1612 | goto done; /* XXX: stats?? */ |
| 1613 | } |
| 1614 | ieee80211_mesh_rt_flush_peer(vap, PERR_DADDR(i)); |
| 1615 | KASSERT(j < 32, ("PERR, error ndest >= 32 (%u)", j)); |
| 1616 | } |
| 1617 | if (j == 0) { |
| 1618 | IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, "%s", |
| 1619 | "PERR not accepted"); |
| 1620 | goto done; /* XXX: stats?? */ |
| 1621 | } |
| 1622 | |
| 1623 | /* |
| 1624 | * Propagate the PERR if we previously found it on our routing table. |
| 1625 | */ |
| 1626 | if (forward && perr->perr_ttl > 1) { |
| 1627 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, ni, |
| 1628 | "propagate PERR from %6D", wh->i_addr2, ":"); |
| 1629 | pperr->perr_ndests = j; |
| 1630 | pperr->perr_ttl--; |
| 1631 | hwmp_send_perr(vap, broadcastaddr, pperr); |
| 1632 | } |
| 1633 | done: |
| 1634 | if (pperr != NULL) |
| 1635 | kfree(pperr, M_80211_MESH_PERR); |
| 1636 | } |
| 1637 | #undef PERR_DFLAGS |
| 1638 | #undef PERR_DADDR |
| 1639 | #undef PERR_DSEQ |
| 1640 | #undef PERR_DEXTADDR |
| 1641 | #undef PERR_DRCODE |
| 1642 | |
| 1643 | static int |
| 1644 | hwmp_send_perr(struct ieee80211vap *vap, |
| 1645 | const uint8_t da[IEEE80211_ADDR_LEN], |
| 1646 | struct ieee80211_meshperr_ie *perr) |
| 1647 | { |
| 1648 | struct ieee80211_hwmp_state *hs = vap->iv_hwmp; |
| 1649 | int i; |
| 1650 | uint8_t length = 0; |
| 1651 | |
| 1652 | /* |
| 1653 | * Enforce PERR interval. |
| 1654 | */ |
| 1655 | if (ratecheck(&hs->hs_lastperr, &ieee80211_hwmp_perrminint) == 0) |
| 1656 | return EALREADY; |
| 1657 | getmicrouptime(&hs->hs_lastperr); |
| 1658 | |
| 1659 | /* |
| 1660 | * mesh perr action frame format |
| 1661 | * [6] da |
| 1662 | * [6] sa |
| 1663 | * [6] addr3 = sa |
| 1664 | * [1] action |
| 1665 | * [1] category |
| 1666 | * [tlv] mesh path error |
| 1667 | */ |
| 1668 | perr->perr_ie = IEEE80211_ELEMID_MESHPERR; |
| 1669 | length = IEEE80211_MESHPERR_BASE_SZ; |
| 1670 | for (i = 0; i<perr->perr_ndests; i++) { |
| 1671 | if (perr->perr_dests[i].dest_flags & |
| 1672 | IEEE80211_MESHPERR_FLAGS_AE) { |
| 1673 | length += IEEE80211_MESHPERR_DEST_SZ_AE; |
| 1674 | continue ; |
| 1675 | } |
| 1676 | length += IEEE80211_MESHPERR_DEST_SZ; |
| 1677 | } |
| 1678 | perr->perr_len =length; |
| 1679 | return hwmp_send_action(vap, da, (uint8_t *)perr, perr->perr_len+2); |
| 1680 | } |
| 1681 | |
| 1682 | /* |
| 1683 | * Called from the rest of the net80211 code (mesh code for example). |
| 1684 | * NB: IEEE80211_REASON_MESH_PERR_DEST_UNREACH can be trigger by the fact that |
| 1685 | * a mesh STA is unable to forward an MSDU/MMPDU to a next-hop mesh STA. |
| 1686 | */ |
| 1687 | #define PERR_DFLAGS(n) perr.perr_dests[n].dest_flags |
| 1688 | #define PERR_DADDR(n) perr.perr_dests[n].dest_addr |
| 1689 | #define PERR_DSEQ(n) perr.perr_dests[n].dest_seq |
| 1690 | #define PERR_DEXTADDR(n) perr.perr_dests[n].dest_ext_addr |
| 1691 | #define PERR_DRCODE(n) perr.perr_dests[n].dest_rcode |
| 1692 | static void |
| 1693 | hwmp_senderror(struct ieee80211vap *vap, |
| 1694 | const uint8_t addr[IEEE80211_ADDR_LEN], |
| 1695 | struct ieee80211_mesh_route *rt, int rcode) |
| 1696 | { |
| 1697 | struct ieee80211_mesh_state *ms = vap->iv_mesh; |
| 1698 | struct ieee80211_hwmp_route *hr = NULL; |
| 1699 | struct ieee80211_meshperr_ie perr; |
| 1700 | |
| 1701 | if (rt != NULL) |
| 1702 | hr = IEEE80211_MESH_ROUTE_PRIV(rt, |
| 1703 | struct ieee80211_hwmp_route); |
| 1704 | |
| 1705 | perr.perr_ndests = 1; |
| 1706 | perr.perr_ttl = ms->ms_ttl; |
| 1707 | PERR_DFLAGS(0) = 0; |
| 1708 | PERR_DRCODE(0) = rcode; |
| 1709 | |
| 1710 | switch (rcode) { |
| 1711 | case IEEE80211_REASON_MESH_PERR_NO_FI: |
| 1712 | IEEE80211_ADDR_COPY(PERR_DADDR(0), addr); |
| 1713 | PERR_DSEQ(0) = 0; /* reserved */ |
| 1714 | break; |
| 1715 | case IEEE80211_REASON_MESH_PERR_NO_PROXY: |
| 1716 | KASSERT(rt != NULL, ("no proxy info for sending PERR")); |
| 1717 | KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY, |
| 1718 | ("route is not marked proxy")); |
| 1719 | PERR_DFLAGS(0) |= IEEE80211_MESHPERR_FLAGS_AE; |
| 1720 | IEEE80211_ADDR_COPY(PERR_DADDR(0), vap->iv_myaddr); |
| 1721 | PERR_DSEQ(0) = rt->rt_ext_seq; |
| 1722 | IEEE80211_ADDR_COPY(PERR_DEXTADDR(0), addr); |
| 1723 | break; |
| 1724 | case IEEE80211_REASON_MESH_PERR_DEST_UNREACH: |
| 1725 | KASSERT(rt != NULL, ("no route info for sending PERR")); |
| 1726 | IEEE80211_ADDR_COPY(PERR_DADDR(0), addr); |
| 1727 | PERR_DSEQ(0) = hr->hr_seq; |
| 1728 | break; |
| 1729 | default: |
| 1730 | KASSERT(0, ("unknown reason code for HWMP PERR (%u)", rcode)); |
| 1731 | } |
| 1732 | hwmp_send_perr(vap, broadcastaddr, &perr); |
| 1733 | } |
| 1734 | #undef PERR_DFLAGS |
| 1735 | #undef PEER_DADDR |
| 1736 | #undef PERR_DSEQ |
| 1737 | #undef PERR_DEXTADDR |
| 1738 | #undef PERR_DRCODE |
| 1739 | |
| 1740 | static void |
| 1741 | hwmp_recv_rann(struct ieee80211vap *vap, struct ieee80211_node *ni, |
| 1742 | const struct ieee80211_frame *wh, const struct ieee80211_meshrann_ie *rann) |
| 1743 | { |
| 1744 | struct ieee80211_mesh_state *ms = vap->iv_mesh; |
| 1745 | struct ieee80211_hwmp_state *hs = vap->iv_hwmp; |
| 1746 | struct ieee80211_mesh_route *rt = NULL; |
| 1747 | struct ieee80211_hwmp_route *hr; |
| 1748 | struct ieee80211_meshpreq_ie preq; |
| 1749 | struct ieee80211_meshrann_ie prann; |
| 1750 | uint32_t metric = 0; |
| 1751 | |
| 1752 | if (IEEE80211_ADDR_EQ(rann->rann_addr, vap->iv_myaddr)) |
| 1753 | return; |
| 1754 | |
| 1755 | rt = ieee80211_mesh_rt_find(vap, rann->rann_addr); |
| 1756 | if (rt != NULL && rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) { |
| 1757 | hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); |
| 1758 | |
| 1759 | /* Acceptance criteria: if RANN.seq < stored seq, discard RANN */ |
| 1760 | if (HWMP_SEQ_LT(rann->rann_seq, hr->hr_seq)) { |
| 1761 | IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, |
| 1762 | "RANN seq %u < %u", rann->rann_seq, hr->hr_seq); |
| 1763 | return; |
| 1764 | } |
| 1765 | |
| 1766 | /* Acceptance criteria: if RANN.seq == stored seq AND |
| 1767 | * RANN.metric > stored metric, discard RANN */ |
| 1768 | if (HWMP_SEQ_EQ(rann->rann_seq, hr->hr_seq) && |
| 1769 | rann->rann_metric > rt->rt_metric) { |
| 1770 | IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, |
| 1771 | "RANN metric %u > %u", rann->rann_metric, rt->rt_metric); |
| 1772 | return; |
| 1773 | } |
| 1774 | } |
| 1775 | |
| 1776 | /* RANN ACCEPTED */ |
| 1777 | |
| 1778 | ieee80211_hwmp_rannint = rann->rann_interval; /* XXX: mtx lock? */ |
| 1779 | metric = rann->rann_metric + ms->ms_pmetric->mpm_metric(ni); |
| 1780 | |
| 1781 | if (rt == NULL) { |
| 1782 | rt = ieee80211_mesh_rt_add(vap, rann->rann_addr); |
| 1783 | if (rt == NULL) { |
| 1784 | IEEE80211_DISCARD(vap, IEEE80211_MSG_HWMP, wh, NULL, |
| 1785 | "unable to add mac for RANN root %6D", |
| 1786 | rann->rann_addr, ":"); |
| 1787 | vap->iv_stats.is_mesh_rtaddfailed++; |
| 1788 | return; |
| 1789 | } |
| 1790 | } |
| 1791 | hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); |
| 1792 | /* Check if root is a mesh gate, mark it */ |
| 1793 | if (rann->rann_flags & IEEE80211_MESHRANN_FLAGS_GATE) { |
| 1794 | struct ieee80211_mesh_gate_route *gr; |
| 1795 | |
| 1796 | rt->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE; |
| 1797 | gr = ieee80211_mesh_mark_gate(vap, rann->rann_addr, |
| 1798 | rt); |
| 1799 | gr->gr_lastseq = 0; /* NOT GANN */ |
| 1800 | } |
| 1801 | /* discovery timeout */ |
| 1802 | ieee80211_mesh_rt_update(rt, |
| 1803 | ticks_to_msecs(ieee80211_hwmp_roottimeout)); |
| 1804 | |
| 1805 | preq.preq_flags = IEEE80211_MESHPREQ_FLAGS_AM; |
| 1806 | preq.preq_hopcount = 0; |
| 1807 | preq.preq_ttl = ms->ms_ttl; |
| 1808 | preq.preq_id = 0; /* reserved */ |
| 1809 | IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr); |
| 1810 | preq.preq_origseq = ++hs->hs_seq; |
| 1811 | preq.preq_lifetime = ieee80211_hwmp_roottimeout; |
| 1812 | preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL; |
| 1813 | preq.preq_tcount = 1; |
| 1814 | preq.preq_targets[0].target_flags = IEEE80211_MESHPREQ_TFLAGS_TO; |
| 1815 | /* NB: IEEE80211_MESHPREQ_TFLAGS_USN = 0 implicitly implied */ |
| 1816 | IEEE80211_ADDR_COPY(preq.preq_targets[0].target_addr, rann->rann_addr); |
| 1817 | preq.preq_targets[0].target_seq = rann->rann_seq; |
| 1818 | /* XXX: if rootconfint have not passed, we built this preq in vain */ |
| 1819 | hwmp_send_preq(vap, wh->i_addr2, &preq, &hr->hr_lastrootconf, |
| 1820 | &ieee80211_hwmp_rootconfint); |
| 1821 | |
| 1822 | /* propagate a RANN */ |
| 1823 | if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID && |
| 1824 | rann->rann_ttl > 1 && |
| 1825 | ms->ms_flags & IEEE80211_MESHFLAGS_FWD) { |
| 1826 | hr->hr_seq = rann->rann_seq; |
| 1827 | memcpy(&prann, rann, sizeof(prann)); |
| 1828 | prann.rann_hopcount += 1; |
| 1829 | prann.rann_ttl -= 1; |
| 1830 | prann.rann_metric += ms->ms_pmetric->mpm_metric(ni); |
| 1831 | hwmp_send_rann(vap, broadcastaddr, &prann); |
| 1832 | } |
| 1833 | } |
| 1834 | |
| 1835 | static int |
| 1836 | hwmp_send_rann(struct ieee80211vap *vap, |
| 1837 | const uint8_t da[IEEE80211_ADDR_LEN], |
| 1838 | struct ieee80211_meshrann_ie *rann) |
| 1839 | { |
| 1840 | /* |
| 1841 | * mesh rann action frame format |
| 1842 | * [6] da |
| 1843 | * [6] sa |
| 1844 | * [6] addr3 = sa |
| 1845 | * [1] action |
| 1846 | * [1] category |
| 1847 | * [tlv] root annoucement |
| 1848 | */ |
| 1849 | rann->rann_ie = IEEE80211_ELEMID_MESHRANN; |
| 1850 | rann->rann_len = IEEE80211_MESHRANN_BASE_SZ; |
| 1851 | return hwmp_send_action(vap, da, (uint8_t *)rann, rann->rann_len + 2); |
| 1852 | } |
| 1853 | |
| 1854 | #define PREQ_TFLAGS(n) preq.preq_targets[n].target_flags |
| 1855 | #define PREQ_TADDR(n) preq.preq_targets[n].target_addr |
| 1856 | #define PREQ_TSEQ(n) preq.preq_targets[n].target_seq |
| 1857 | static void |
| 1858 | hwmp_rediscover_cb(void *arg) |
| 1859 | { |
| 1860 | struct ieee80211_mesh_route *rt = arg; |
| 1861 | struct ieee80211vap *vap = rt->rt_vap; |
| 1862 | struct ieee80211_hwmp_state *hs = vap->iv_hwmp; |
| 1863 | struct ieee80211_mesh_state *ms = vap->iv_mesh; |
| 1864 | struct ieee80211_hwmp_route *hr; |
| 1865 | struct ieee80211_meshpreq_ie preq; /* Optimize: storing first preq? */ |
| 1866 | |
| 1867 | if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID)) |
| 1868 | return ; /* nothing to do */ |
| 1869 | |
| 1870 | hr = IEEE80211_MESH_ROUTE_PRIV(rt, struct ieee80211_hwmp_route); |
| 1871 | if (hr->hr_preqretries >= |
| 1872 | ieee80211_hwmp_maxpreq_retries) { |
| 1873 | IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, |
| 1874 | rt->rt_dest, "%s", |
| 1875 | "max number of discovery, send queued frames to GATE"); |
| 1876 | ieee80211_mesh_forward_to_gates(vap, rt); |
| 1877 | vap->iv_stats.is_mesh_fwd_nopath++; |
| 1878 | return ; /* XXX: flush queue? */ |
| 1879 | } |
| 1880 | |
| 1881 | hr->hr_preqretries++; |
| 1882 | |
| 1883 | |
| 1884 | IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, rt->rt_dest, |
| 1885 | "start path rediscovery , target seq %u", hr->hr_seq); |
| 1886 | /* |
| 1887 | * Try to discover the path for this node. |
| 1888 | * Group addressed PREQ Case A |
| 1889 | */ |
| 1890 | preq.preq_flags = 0; |
| 1891 | preq.preq_hopcount = 0; |
| 1892 | preq.preq_ttl = ms->ms_ttl; |
| 1893 | preq.preq_id = ++hs->hs_preqid; |
| 1894 | IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr); |
| 1895 | preq.preq_origseq = hr->hr_origseq; |
| 1896 | preq.preq_lifetime = ticks_to_msecs(ieee80211_hwmp_pathtimeout); |
| 1897 | preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL; |
| 1898 | preq.preq_tcount = 1; |
| 1899 | IEEE80211_ADDR_COPY(PREQ_TADDR(0), rt->rt_dest); |
| 1900 | PREQ_TFLAGS(0) = 0; |
| 1901 | if (ieee80211_hwmp_targetonly) |
| 1902 | PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_TO; |
| 1903 | PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_USN; |
| 1904 | PREQ_TSEQ(0) = 0; /* RESERVED when USN flag is set */ |
| 1905 | /* XXX check return value */ |
| 1906 | hwmp_send_preq(vap, broadcastaddr, &preq, &hr->hr_lastpreq, |
| 1907 | &ieee80211_hwmp_preqminint); |
| 1908 | callout_reset(&rt->rt_discovery, |
| 1909 | ieee80211_hwmp_net_diameter_traversaltime * 2, |
| 1910 | hwmp_rediscover_cb, rt); |
| 1911 | } |
| 1912 | |
| 1913 | static struct ieee80211_node * |
| 1914 | hwmp_discover(struct ieee80211vap *vap, |
| 1915 | const uint8_t dest[IEEE80211_ADDR_LEN], struct mbuf *m) |
| 1916 | { |
| 1917 | struct ieee80211_hwmp_state *hs = vap->iv_hwmp; |
| 1918 | struct ieee80211_mesh_state *ms = vap->iv_mesh; |
| 1919 | struct ieee80211_mesh_route *rt = NULL; |
| 1920 | struct ieee80211_hwmp_route *hr; |
| 1921 | struct ieee80211_meshpreq_ie preq; |
| 1922 | struct ieee80211_node *ni; |
| 1923 | int sendpreq = 0; |
| 1924 | |
| 1925 | KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, |
| 1926 | ("not a mesh vap, opmode %d", vap->iv_opmode)); |
| 1927 | |
| 1928 | KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest), |
| 1929 | ("%s: discovering self!", __func__)); |
| 1930 | |
| 1931 | ni = NULL; |
| 1932 | if (!IEEE80211_IS_MULTICAST(dest)) { |
| 1933 | rt = ieee80211_mesh_rt_find(vap, dest); |
| 1934 | if (rt == NULL) { |
| 1935 | rt = ieee80211_mesh_rt_add(vap, dest); |
| 1936 | if (rt == NULL) { |
| 1937 | IEEE80211_NOTE(vap, IEEE80211_MSG_HWMP, |
| 1938 | ni, "unable to add discovery path to %6D", |
| 1939 | dest, ":"); |
| 1940 | vap->iv_stats.is_mesh_rtaddfailed++; |
| 1941 | goto done; |
| 1942 | } |
| 1943 | } |
| 1944 | hr = IEEE80211_MESH_ROUTE_PRIV(rt, |
| 1945 | struct ieee80211_hwmp_route); |
| 1946 | if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER) { |
| 1947 | IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, dest, |
| 1948 | "%s", "already discovering queue frame until path found"); |
| 1949 | sendpreq = 1; |
| 1950 | goto done; |
| 1951 | } |
| 1952 | if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) { |
| 1953 | if (hr->hr_lastdiscovery != 0 && |
| 1954 | (ticks - hr->hr_lastdiscovery < |
| 1955 | (ieee80211_hwmp_net_diameter_traversaltime * 2))) { |
| 1956 | IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, |
| 1957 | dest, NULL, "%s", |
| 1958 | "too frequent discovery requeust"); |
| 1959 | sendpreq = 1; |
| 1960 | goto done; |
| 1961 | } |
| 1962 | hr->hr_lastdiscovery = ticks; |
| 1963 | if (hr->hr_preqretries >= |
| 1964 | ieee80211_hwmp_maxpreq_retries) { |
| 1965 | IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, |
| 1966 | dest, NULL, "%s", |
| 1967 | "no valid path , max number of discovery"); |
| 1968 | vap->iv_stats.is_mesh_fwd_nopath++; |
| 1969 | goto done; |
| 1970 | } |
| 1971 | rt->rt_flags = IEEE80211_MESHRT_FLAGS_DISCOVER; |
| 1972 | hr->hr_preqretries++; |
| 1973 | if (hr->hr_origseq == 0) |
| 1974 | hr->hr_origseq = ++hs->hs_seq; |
| 1975 | rt->rt_metric = IEEE80211_MESHLMETRIC_INITIALVAL; |
| 1976 | sendpreq = 1; |
| 1977 | IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, dest, |
| 1978 | "start path discovery (src %s), target seq %u", |
| 1979 | m == NULL ? "<none>" : ether_sprintf( |
| 1980 | mtod(m, struct ether_header *)->ether_shost), |
| 1981 | hr->hr_seq); |
| 1982 | /* |
| 1983 | * Try to discover the path for this node. |
| 1984 | * Group addressed PREQ Case A |
| 1985 | */ |
| 1986 | preq.preq_flags = 0; |
| 1987 | preq.preq_hopcount = 0; |
| 1988 | preq.preq_ttl = ms->ms_ttl; |
| 1989 | preq.preq_id = ++hs->hs_preqid; |
| 1990 | IEEE80211_ADDR_COPY(preq.preq_origaddr, vap->iv_myaddr); |
| 1991 | preq.preq_origseq = hr->hr_origseq; |
| 1992 | preq.preq_lifetime = |
| 1993 | ticks_to_msecs(ieee80211_hwmp_pathtimeout); |
| 1994 | preq.preq_metric = IEEE80211_MESHLMETRIC_INITIALVAL; |
| 1995 | preq.preq_tcount = 1; |
| 1996 | IEEE80211_ADDR_COPY(PREQ_TADDR(0), dest); |
| 1997 | PREQ_TFLAGS(0) = 0; |
| 1998 | if (ieee80211_hwmp_targetonly) |
| 1999 | PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_TO; |
| 2000 | PREQ_TFLAGS(0) |= IEEE80211_MESHPREQ_TFLAGS_USN; |
| 2001 | PREQ_TSEQ(0) = 0; /* RESERVED when USN flag is set */ |
| 2002 | /* XXX check return value */ |
| 2003 | hwmp_send_preq(vap, broadcastaddr, &preq, |
| 2004 | &hr->hr_lastpreq, &ieee80211_hwmp_preqminint); |
| 2005 | callout_reset(&rt->rt_discovery, |
| 2006 | ieee80211_hwmp_net_diameter_traversaltime * 2, |
| 2007 | hwmp_rediscover_cb, rt); |
| 2008 | } |
| 2009 | if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) |
| 2010 | ni = ieee80211_find_txnode(vap, rt->rt_nexthop); |
| 2011 | } else { |
| 2012 | ni = ieee80211_find_txnode(vap, dest); |
| 2013 | /* NB: if null then we leak mbuf */ |
| 2014 | KASSERT(ni != NULL, ("leak mcast frame")); |
| 2015 | return ni; |
| 2016 | } |
| 2017 | done: |
| 2018 | if (ni == NULL && m != NULL) { |
| 2019 | if (sendpreq) { |
| 2020 | struct ieee80211com *ic = vap->iv_ic; |
| 2021 | /* |
| 2022 | * Queue packet for transmit when path discovery |
| 2023 | * completes. If discovery never completes the |
| 2024 | * frame will be flushed by way of the aging timer. |
| 2025 | */ |
| 2026 | IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP, dest, |
| 2027 | "%s", "queue frame until path found"); |
| 2028 | m->m_pkthdr.rcvif = (void *)(uintptr_t) |
| 2029 | ieee80211_mac_hash(ic, dest); |
| 2030 | /* XXX age chosen randomly */ |
| 2031 | ieee80211_ageq_append(&ic->ic_stageq, m, |
| 2032 | IEEE80211_INACT_WAIT); |
| 2033 | } else { |
| 2034 | IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_HWMP, |
| 2035 | dest, NULL, "%s", "no valid path to this node"); |
| 2036 | m_freem(m); |
| 2037 | } |
| 2038 | } |
| 2039 | return ni; |
| 2040 | } |
| 2041 | #undef PREQ_TFLAGS |
| 2042 | #undef PREQ_TADDR |
| 2043 | #undef PREQ_TSEQ |
| 2044 | |
| 2045 | static int |
| 2046 | hwmp_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq) |
| 2047 | { |
| 2048 | struct ieee80211_hwmp_state *hs = vap->iv_hwmp; |
| 2049 | int error; |
| 2050 | |
| 2051 | if (vap->iv_opmode != IEEE80211_M_MBSS) |
| 2052 | return ENOSYS; |
| 2053 | error = 0; |
| 2054 | switch (ireq->i_type) { |
| 2055 | case IEEE80211_IOC_HWMP_ROOTMODE: |
| 2056 | ireq->i_val = hs->hs_rootmode; |
| 2057 | break; |
| 2058 | case IEEE80211_IOC_HWMP_MAXHOPS: |
| 2059 | ireq->i_val = hs->hs_maxhops; |
| 2060 | break; |
| 2061 | default: |
| 2062 | return ENOSYS; |
| 2063 | } |
| 2064 | return error; |
| 2065 | } |
| 2066 | IEEE80211_IOCTL_GET(hwmp, hwmp_ioctl_get80211); |
| 2067 | |
| 2068 | static int |
| 2069 | hwmp_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq) |
| 2070 | { |
| 2071 | struct ieee80211_hwmp_state *hs = vap->iv_hwmp; |
| 2072 | int error; |
| 2073 | |
| 2074 | if (vap->iv_opmode != IEEE80211_M_MBSS) |
| 2075 | return ENOSYS; |
| 2076 | error = 0; |
| 2077 | switch (ireq->i_type) { |
| 2078 | case IEEE80211_IOC_HWMP_ROOTMODE: |
| 2079 | if (ireq->i_val < 0 || ireq->i_val > 3) |
| 2080 | return EINVAL; |
| 2081 | hs->hs_rootmode = ireq->i_val; |
| 2082 | hwmp_rootmode_setup(vap); |
| 2083 | break; |
| 2084 | case IEEE80211_IOC_HWMP_MAXHOPS: |
| 2085 | if (ireq->i_val <= 0 || ireq->i_val > 255) |
| 2086 | return EINVAL; |
| 2087 | hs->hs_maxhops = ireq->i_val; |
| 2088 | break; |
| 2089 | default: |
| 2090 | return ENOSYS; |
| 2091 | } |
| 2092 | return error; |
| 2093 | } |
| 2094 | IEEE80211_IOCTL_SET(hwmp, hwmp_ioctl_set80211); |