sys/net80211/ieee80211_mesh.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2009 The FreeBSD Foundation
   5  * All rights reserved.
   6  *
   7  * This software was developed by Rui Paulo under sponsorship from the
   8  * FreeBSD Foundation.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31 #include <sys/cdefs.h>
  32 #ifdef __FreeBSD__
  33 __FBSDID("$FreeBSD$");
  34 #endif
  35
  36 /*
  37  * IEEE 802.11s Mesh Point (MBSS) support.
  38  *
  39  * Based on March 2009, D3.0 802.11s draft spec.
  40  */
  41 #include "opt_inet.h"
  42 #include "opt_wlan.h"
  43
  44 #include <sys/param.h>
  45 #include <sys/systm.h>
  46 #include <sys/mbuf.h>
  47 #include <sys/malloc.h>
  48 #include <sys/kernel.h>
  49
  50 #include <sys/socket.h>
  51 #include <sys/sockio.h>
  52 #include <sys/endian.h>
  53 #include <sys/errno.h>
  54 #include <sys/proc.h>
  55 #include <sys/sysctl.h>
  56
  57 #include <net/bpf.h>
  58 #include <net/if.h>
  59 #include <net/if_var.h>
  60 #include <net/if_media.h>
  61 #include <net/if_llc.h>
  62 #include <net/ethernet.h>
  63
  64 #include <net80211/ieee80211_var.h>
  65 #include <net80211/ieee80211_action.h>
  66 #ifdef IEEE80211_SUPPORT_SUPERG
  67 #include <net80211/ieee80211_superg.h>
  68 #endif
  69 #include <net80211/ieee80211_input.h>
  70 #include <net80211/ieee80211_mesh.h>
  71
  72 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
  73 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
  74 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
  75 static void     mesh_vattach(struct ieee80211vap *);
  76 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  77 static void     mesh_rt_cleanup_cb(void *);
  78 static void     mesh_gatemode_setup(struct ieee80211vap *);
  79 static void     mesh_gatemode_cb(void *);
  80 static void     mesh_linkchange(struct ieee80211_node *,
  81                     enum ieee80211_mesh_mlstate);
  82 static void     mesh_checkid(void *, struct ieee80211_node *);
  83 static uint32_t mesh_generateid(struct ieee80211vap *);
  84 static int      mesh_checkpseq(struct ieee80211vap *,
  85                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
  86 static void     mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
  87                     struct ieee80211_mesh_route *);
  88 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
  89                     const struct ieee80211_meshcntl *);
  90 static int      mesh_input(struct ieee80211_node *, struct mbuf *,
  91                     const struct ieee80211_rx_stats *rxs, int, int);
  92 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
  93                     const struct ieee80211_rx_stats *rxs, int, int);
  94 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  95 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
  96 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
  97 static void     mesh_peer_timeout_cb(void *);
  98 static __inline void
  99                 mesh_peer_timeout_stop(struct ieee80211_node *);
 100 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
 101 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
 102 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
 103                     const uint8_t *);
 104 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
 105
 106 /*
 107  * Timeout values come from the specification and are in milliseconds.
 108  */
 109 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
 110     "IEEE 802.11s parameters");
 111 static int      ieee80211_mesh_gateint = -1;
 112 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW,
 113     &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
 114     "mesh gate interval (ms)");
 115 static int ieee80211_mesh_retrytimeout = -1;
 116 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
 117     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 118     "Retry timeout (msec)");
 119 static int ieee80211_mesh_holdingtimeout = -1;
 120
 121 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
 122     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 123     "Holding state timeout (msec)");
 124 static int ieee80211_mesh_confirmtimeout = -1;
 125 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
 126     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 127     "Confirm state timeout (msec)");
 128 static int ieee80211_mesh_backofftimeout = -1;
 129 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW,
 130     &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 131     "Backoff timeout (msec). This is to throutles peering forever when "
 132     "not receiving answer or is rejected by a neighbor");
 133 static int ieee80211_mesh_maxretries = 2;
 134 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW,
 135     &ieee80211_mesh_maxretries, 0,
 136     "Maximum retries during peer link establishment");
 137 static int ieee80211_mesh_maxholding = 2;
 138 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW,
 139     &ieee80211_mesh_maxholding, 0,
 140     "Maximum times we are allowed to transition to HOLDING state before "
 141     "backinoff during peer link establishment");
 142
 143 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
 144         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 145
 146 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
 147 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
 148 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
 149 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
 150 static  ieee80211_recv_action_func mesh_recv_action_meshgate;
 151
 152 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
 153 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
 154 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
 155 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
 156 static  ieee80211_send_action_func mesh_send_action_meshgate;
 157
 158 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
 159         .mpm_descr      = "AIRTIME",
 160         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
 161         .mpm_metric     = mesh_airtime_calc,
 162 };
 163
 164 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
 165 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
 166
 167 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
 168 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
 169 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
 170
 171 /* The longer one of the lifetime should be stored as new lifetime */
 172 #define MESH_ROUTE_LIFETIME_MAX(a, b)   (a > b ? a : b)
 173
 174 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
 175 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
 176
 177 /*
 178  * Helper functions to manipulate the Mesh routing table.
 179  */
 180
 181 static struct ieee80211_mesh_route *
 182 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
 183     const uint8_t dest[IEEE80211_ADDR_LEN])
 184 {
 185         struct ieee80211_mesh_route *rt;
 186
 187         MESH_RT_LOCK_ASSERT(ms);
 188
 189         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 190                 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
 191                         return rt;
 192         }
 193         return NULL;
 194 }
 195
 196 static struct ieee80211_mesh_route *
 197 mesh_rt_add_locked(struct ieee80211vap *vap,
 198     const uint8_t dest[IEEE80211_ADDR_LEN])
 199 {
 200         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 201         struct ieee80211_mesh_route *rt;
 202
 203         KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
 204             ("%s: adding broadcast to the routing table", __func__));
 205
 206         MESH_RT_LOCK_ASSERT(ms);
 207
 208         rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) +
 209             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT,
 210             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 211         if (rt != NULL) {
 212                 rt->rt_vap = vap;
 213                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
 214                 rt->rt_priv = (void *)ALIGN(&rt[1]);
 215                 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT");
 216                 callout_init(&rt->rt_discovery, 1);
 217                 rt->rt_updtime = ticks; /* create time */
 218                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
 219         }
 220         return rt;
 221 }
 222
 223 struct ieee80211_mesh_route *
 224 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
 225     const uint8_t dest[IEEE80211_ADDR_LEN])
 226 {
 227         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 228         struct ieee80211_mesh_route *rt;
 229
 230         MESH_RT_LOCK(ms);
 231         rt = mesh_rt_find_locked(ms, dest);
 232         MESH_RT_UNLOCK(ms);
 233         return rt;
 234 }
 235
 236 struct ieee80211_mesh_route *
 237 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
 238     const uint8_t dest[IEEE80211_ADDR_LEN])
 239 {
 240         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 241         struct ieee80211_mesh_route *rt;
 242
 243         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
 244             ("%s: duplicate entry in the routing table", __func__));
 245         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
 246             ("%s: adding self to the routing table", __func__));
 247
 248         MESH_RT_LOCK(ms);
 249         rt = mesh_rt_add_locked(vap, dest);
 250         MESH_RT_UNLOCK(ms);
 251         return rt;
 252 }
 253
 254 /*
 255  * Update the route lifetime and returns the updated lifetime.
 256  * If new_lifetime is zero and route is timedout it will be invalidated.
 257  * new_lifetime is in msec
 258  */
 259 int
 260 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
 261 {
 262         int timesince, now;
 263         uint32_t lifetime = 0;
 264
 265         KASSERT(rt != NULL, ("route is NULL"));
 266
 267         now = ticks;
 268         MESH_RT_ENTRY_LOCK(rt);
 269
 270         /* dont clobber a proxy entry gated by us */
 271         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
 272                 MESH_RT_ENTRY_UNLOCK(rt);
 273                 return rt->rt_lifetime;
 274         }
 275
 276         timesince = ticks_to_msecs(now - rt->rt_updtime);
 277         rt->rt_updtime = now;
 278         if (timesince >= rt->rt_lifetime) {
 279                 if (new_lifetime != 0) {
 280                         rt->rt_lifetime = new_lifetime;
 281                 }
 282                 else {
 283                         rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
 284                         rt->rt_lifetime = 0;
 285                 }
 286         } else {
 287                 /* update what is left of lifetime */
 288                 rt->rt_lifetime = rt->rt_lifetime - timesince;
 289                 rt->rt_lifetime  = MESH_ROUTE_LIFETIME_MAX(
 290                         new_lifetime, rt->rt_lifetime);
 291         }
 292         lifetime = rt->rt_lifetime;
 293         MESH_RT_ENTRY_UNLOCK(rt);
 294
 295         return lifetime;
 296 }
 297
 298 /*
 299  * Add a proxy route (as needed) for the specified destination.
 300  */
 301 void
 302 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
 303     const uint8_t dest[IEEE80211_ADDR_LEN])
 304 {
 305         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 306         struct ieee80211_mesh_route *rt;
 307
 308         MESH_RT_LOCK(ms);
 309         rt = mesh_rt_find_locked(ms, dest);
 310         if (rt == NULL) {
 311                 rt = mesh_rt_add_locked(vap, dest);
 312                 if (rt == NULL) {
 313                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 314                             "%s", "unable to add proxy entry");
 315                         vap->iv_stats.is_mesh_rtaddfailed++;
 316                 } else {
 317                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 318                             "%s", "add proxy entry");
 319                         IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
 320                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 321                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 322                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
 323                 }
 324         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 325                 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
 326                     ("no proxy flag for poxy entry"));
 327                 struct ieee80211com *ic = vap->iv_ic;
 328                 /*
 329                  * Fix existing entry created by received frames from
 330                  * stations that have some memory of dest.  We also
 331                  * flush any frames held on the staging queue; delivering
 332                  * them is too much trouble right now.
 333                  */
 334                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 335                     "%s", "fix proxy entry");
 336                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 337                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 338                              |  IEEE80211_MESHRT_FLAGS_PROXY;
 339                 /* XXX belongs in hwmp */
 340                 ieee80211_ageq_drain_node(&ic->ic_stageq,
 341                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
 342                 /* XXX stat? */
 343         }
 344         MESH_RT_UNLOCK(ms);
 345 }
 346
 347 static __inline void
 348 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
 349 {
 350         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
 351         /*
 352          * Grab the lock before destroying it, to be sure no one else
 353          * is holding the route.
 354          */
 355         MESH_RT_ENTRY_LOCK(rt);
 356         callout_drain(&rt->rt_discovery);
 357         MESH_RT_ENTRY_LOCK_DESTROY(rt);
 358         IEEE80211_FREE(rt, M_80211_MESH_RT);
 359 }
 360
 361 void
 362 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
 363     const uint8_t dest[IEEE80211_ADDR_LEN])
 364 {
 365         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 366         struct ieee80211_mesh_route *rt, *next;
 367
 368         MESH_RT_LOCK(ms);
 369         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 370                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
 371                         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
 372                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 373                                     IEEE80211_REASON_MESH_PERR_NO_PROXY);
 374                         } else {
 375                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 376                                     IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
 377                         }
 378                         mesh_rt_del(ms, rt);
 379                         MESH_RT_UNLOCK(ms);
 380                         return;
 381                 }
 382         }
 383         MESH_RT_UNLOCK(ms);
 384 }
 385
 386 void
 387 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
 388 {
 389         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 390         struct ieee80211_mesh_route *rt, *next;
 391
 392         if (ms == NULL)
 393                 return;
 394         MESH_RT_LOCK(ms);
 395         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
 396                 mesh_rt_del(ms, rt);
 397         MESH_RT_UNLOCK(ms);
 398 }
 399
 400 void
 401 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
 402     const uint8_t peer[IEEE80211_ADDR_LEN])
 403 {
 404         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 405         struct ieee80211_mesh_route *rt, *next;
 406
 407         MESH_RT_LOCK(ms);
 408         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 409                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
 410                         mesh_rt_del(ms, rt);
 411         }
 412         MESH_RT_UNLOCK(ms);
 413 }
 414
 415 /*
 416  * Flush expired routing entries, i.e. those in invalid state for
 417  * some time.
 418  */
 419 static void
 420 mesh_rt_flush_invalid(struct ieee80211vap *vap)
 421 {
 422         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 423         struct ieee80211_mesh_route *rt, *next;
 424
 425         if (ms == NULL)
 426                 return;
 427         MESH_RT_LOCK(ms);
 428         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 429                 /* Discover paths will be deleted by their own callout */
 430                 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
 431                         continue;
 432                 ieee80211_mesh_rt_update(rt, 0);
 433                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
 434                         mesh_rt_del(ms, rt);
 435         }
 436         MESH_RT_UNLOCK(ms);
 437 }
 438
 439 int
 440 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
 441 {
 442         int i, firstempty = -1;
 443
 444         for (i = 0; i < nitems(mesh_proto_paths); i++) {
 445                 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
 446                     IEEE80211_MESH_PROTO_DSZ) == 0)
 447                         return EEXIST;
 448                 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
 449                         firstempty = i;
 450         }
 451         if (firstempty < 0)
 452                 return ENOSPC;
 453         memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
 454         mesh_proto_paths[firstempty].mpp_active = 1;
 455         return 0;
 456 }
 457
 458 int
 459 ieee80211_mesh_register_proto_metric(const struct
 460     ieee80211_mesh_proto_metric *mpm)
 461 {
 462         int i, firstempty = -1;
 463
 464         for (i = 0; i < nitems(mesh_proto_metrics); i++) {
 465                 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
 466                     IEEE80211_MESH_PROTO_DSZ) == 0)
 467                         return EEXIST;
 468                 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
 469                         firstempty = i;
 470         }
 471         if (firstempty < 0)
 472                 return ENOSPC;
 473         memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
 474         mesh_proto_metrics[firstempty].mpm_active = 1;
 475         return 0;
 476 }
 477
 478 static int
 479 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
 480 {
 481         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 482         int i;
 483
 484         for (i = 0; i < nitems(mesh_proto_paths); i++) {
 485                 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
 486                         ms->ms_ppath = &mesh_proto_paths[i];
 487                         return 0;
 488                 }
 489         }
 490         return ENOENT;
 491 }
 492
 493 static int
 494 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
 495 {
 496         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 497         int i;
 498
 499         for (i = 0; i < nitems(mesh_proto_metrics); i++) {
 500                 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
 501                         ms->ms_pmetric = &mesh_proto_metrics[i];
 502                         return 0;
 503                 }
 504         }
 505         return ENOENT;
 506 }
 507
 508 static void
 509 mesh_gatemode_setup(struct ieee80211vap *vap)
 510 {
 511         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 512
 513         /*
 514          * NB: When a mesh gate is running as a ROOT it shall
 515          * not send out periodic GANNs but instead mark the
 516          * mesh gate flag for the corresponding proactive PREQ
 517          * and RANN frames.
 518          */
 519         if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
 520             (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
 521                 callout_drain(&ms->ms_gatetimer);
 522                 return ;
 523         }
 524         callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
 525             mesh_gatemode_cb, vap);
 526 }
 527
 528 static void
 529 mesh_gatemode_cb(void *arg)
 530 {
 531         struct ieee80211vap *vap = (struct ieee80211vap *)arg;
 532         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 533         struct ieee80211_meshgann_ie gann;
 534
 535         gann.gann_flags = 0; /* Reserved */
 536         gann.gann_hopcount = 0;
 537         gann.gann_ttl = ms->ms_ttl;
 538         IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
 539         gann.gann_seq = ms->ms_gateseq++;
 540         gann.gann_interval = ieee80211_mesh_gateint;
 541
 542         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
 543             "send broadcast GANN (seq %u)", gann.gann_seq);
 544
 545         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
 546             IEEE80211_ACTION_MESH_GANN, &gann);
 547         mesh_gatemode_setup(vap);
 548 }
 549
 550 static void
 551 ieee80211_mesh_init(void)
 552 {
 553
 554         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
 555         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
 556
 557         /*
 558          * Setup mesh parameters that depends on the clock frequency.
 559          */
 560         ieee80211_mesh_gateint = msecs_to_ticks(10000);
 561         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
 562         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
 563         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
 564         ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
 565
 566         /*
 567          * Register action frame handlers.
 568          */
 569         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 570             IEEE80211_ACTION_MESHPEERING_OPEN,
 571             mesh_recv_action_meshpeering_open);
 572         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 573             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 574             mesh_recv_action_meshpeering_confirm);
 575         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 576             IEEE80211_ACTION_MESHPEERING_CLOSE,
 577             mesh_recv_action_meshpeering_close);
 578         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 579             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
 580         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 581             IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
 582
 583         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 584             IEEE80211_ACTION_MESHPEERING_OPEN,
 585             mesh_send_action_meshpeering_open);
 586         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 587             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 588             mesh_send_action_meshpeering_confirm);
 589         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 590             IEEE80211_ACTION_MESHPEERING_CLOSE,
 591             mesh_send_action_meshpeering_close);
 592         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 593             IEEE80211_ACTION_MESH_LMETRIC,
 594             mesh_send_action_meshlmetric);
 595         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 596             IEEE80211_ACTION_MESH_GANN,
 597             mesh_send_action_meshgate);
 598
 599         /*
 600          * Register Airtime Link Metric.
 601          */
 602         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
 603
 604 }
 605 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
 606
 607 void
 608 ieee80211_mesh_attach(struct ieee80211com *ic)
 609 {
 610         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
 611 }
 612
 613 void
 614 ieee80211_mesh_detach(struct ieee80211com *ic)
 615 {
 616 }
 617
 618 static void
 619 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
 620 {
 621         struct ieee80211com *ic = ni->ni_ic;
 622         uint16_t args[3];
 623
 624         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
 625                 args[0] = ni->ni_mlpid;
 626                 args[1] = ni->ni_mllid;
 627                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 628                 ieee80211_send_action(ni,
 629                     IEEE80211_ACTION_CAT_SELF_PROT,
 630                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 631                     args);
 632         }
 633         callout_drain(&ni->ni_mltimer);
 634         /* XXX belongs in hwmp */
 635         ieee80211_ageq_drain_node(&ic->ic_stageq,
 636            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
 637 }
 638
 639 static void
 640 mesh_vdetach(struct ieee80211vap *vap)
 641 {
 642         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 643
 644         callout_drain(&ms->ms_cleantimer);
 645         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
 646             NULL);
 647         ieee80211_mesh_rt_flush(vap);
 648         MESH_RT_LOCK_DESTROY(ms);
 649         ms->ms_ppath->mpp_vdetach(vap);
 650         IEEE80211_FREE(vap->iv_mesh, M_80211_VAP);
 651         vap->iv_mesh = NULL;
 652 }
 653
 654 static void
 655 mesh_vattach(struct ieee80211vap *vap)
 656 {
 657         struct ieee80211_mesh_state *ms;
 658         vap->iv_newstate = mesh_newstate;
 659         vap->iv_input = mesh_input;
 660         vap->iv_opdetach = mesh_vdetach;
 661         vap->iv_recv_mgmt = mesh_recv_mgmt;
 662         vap->iv_recv_ctl = mesh_recv_ctl;
 663         ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
 664             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 665         if (ms == NULL) {
 666                 printf("%s: couldn't alloc MBSS state\n", __func__);
 667                 return;
 668         }
 669         vap->iv_mesh = ms;
 670         ms->ms_seq = 0;
 671         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
 672         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
 673         TAILQ_INIT(&ms->ms_known_gates);
 674         TAILQ_INIT(&ms->ms_routes);
 675         MESH_RT_LOCK_INIT(ms, "MBSS");
 676         callout_init(&ms->ms_cleantimer, 1);
 677         callout_init(&ms->ms_gatetimer, 1);
 678         ms->ms_gateseq = 0;
 679         mesh_select_proto_metric(vap, "AIRTIME");
 680         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
 681         mesh_select_proto_path(vap, "HWMP");
 682         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
 683         ms->ms_ppath->mpp_vattach(vap);
 684 }
 685
 686 /*
 687  * IEEE80211_M_MBSS vap state machine handler.
 688  */
 689 static int
 690 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 691 {
 692         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 693         struct ieee80211com *ic = vap->iv_ic;
 694         struct ieee80211_node *ni;
 695         enum ieee80211_state ostate;
 696
 697         IEEE80211_LOCK_ASSERT(ic);
 698
 699         ostate = vap->iv_state;
 700         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 701             __func__, ieee80211_state_name[ostate],
 702             ieee80211_state_name[nstate], arg);
 703         vap->iv_state = nstate;         /* state transition */
 704         if (ostate != IEEE80211_S_SCAN)
 705                 ieee80211_cancel_scan(vap);     /* background scan */
 706         ni = vap->iv_bss;                       /* NB: no reference held */
 707         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
 708                 callout_drain(&ms->ms_cleantimer);
 709                 callout_drain(&ms->ms_gatetimer);
 710         }
 711         switch (nstate) {
 712         case IEEE80211_S_INIT:
 713                 switch (ostate) {
 714                 case IEEE80211_S_SCAN:
 715                         ieee80211_cancel_scan(vap);
 716                         break;
 717                 case IEEE80211_S_CAC:
 718                         ieee80211_dfs_cac_stop(vap);
 719                         break;
 720                 case IEEE80211_S_RUN:
 721                         ieee80211_iterate_nodes(&ic->ic_sta,
 722                             mesh_vdetach_peers, NULL);
 723                         break;
 724                 default:
 725                         break;
 726                 }
 727                 if (ostate != IEEE80211_S_INIT) {
 728                         /* NB: optimize INIT -> INIT case */
 729                         ieee80211_reset_bss(vap);
 730                         ieee80211_mesh_rt_flush(vap);
 731                 }
 732                 break;
 733         case IEEE80211_S_SCAN:
 734                 switch (ostate) {
 735                 case IEEE80211_S_INIT:
 736                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 737                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
 738                             ms->ms_idlen != 0) {
 739                                 /*
 740                                  * Already have a channel and a mesh ID; bypass
 741                                  * the scan and startup immediately.
 742                                  */
 743                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 744                                 break;
 745                         }
 746                         /*
 747                          * Initiate a scan.  We can come here as a result
 748                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 749                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 750                          * and the scan request parameters will be present
 751                          * in iv_scanreq.  Otherwise we do the default.
 752                         */
 753                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 754                                 ieee80211_check_scan(vap,
 755                                     vap->iv_scanreq_flags,
 756                                     vap->iv_scanreq_duration,
 757                                     vap->iv_scanreq_mindwell,
 758                                     vap->iv_scanreq_maxdwell,
 759                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 760                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 761                         } else
 762                                 ieee80211_check_scan_current(vap);
 763                         break;
 764                 default:
 765                         break;
 766                 }
 767                 break;
 768         case IEEE80211_S_CAC:
 769                 /*
 770                  * Start CAC on a DFS channel.  We come here when starting
 771                  * a bss on a DFS channel (see ieee80211_create_ibss).
 772                  */
 773                 ieee80211_dfs_cac_start(vap);
 774                 break;
 775         case IEEE80211_S_RUN:
 776                 switch (ostate) {
 777                 case IEEE80211_S_INIT:
 778                         /*
 779                          * Already have a channel; bypass the
 780                          * scan and startup immediately.
 781                          * Note that ieee80211_create_ibss will call
 782                          * back to do a RUN->RUN state change.
 783                          */
 784                         ieee80211_create_ibss(vap,
 785                             ieee80211_ht_adjust_channel(ic,
 786                                 ic->ic_curchan, vap->iv_flags_ht));
 787                         /* NB: iv_bss is changed on return */
 788                         break;
 789                 case IEEE80211_S_CAC:
 790                         /*
 791                          * NB: This is the normal state change when CAC
 792                          * expires and no radar was detected; no need to
 793                          * clear the CAC timer as it's already expired.
 794                          */
 795                         /* fall thru... */
 796                 case IEEE80211_S_CSA:
 797 #if 0
 798                         /*
 799                          * Shorten inactivity timer of associated stations
 800                          * to weed out sta's that don't follow a CSA.
 801                          */
 802                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 803 #endif
 804                         /*
 805                          * Update bss node channel to reflect where
 806                          * we landed after CSA.
 807                          */
 808                         ieee80211_node_set_chan(ni,
 809                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 810                                 ieee80211_htchanflags(ni->ni_chan)));
 811                         /* XXX bypass debug msgs */
 812                         break;
 813                 case IEEE80211_S_SCAN:
 814                 case IEEE80211_S_RUN:
 815 #ifdef IEEE80211_DEBUG
 816                         if (ieee80211_msg_debug(vap)) {
 817                                 ieee80211_note(vap,
 818                                     "synchronized with %s meshid ",
 819                                     ether_sprintf(ni->ni_meshid));
 820                                 ieee80211_print_essid(ni->ni_meshid,
 821                                     ni->ni_meshidlen);
 822                                 /* XXX MCS/HT */
 823                                 printf(" channel %d\n",
 824                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
 825                         }
 826 #endif
 827                         break;
 828                 default:
 829                         break;
 830                 }
 831                 ieee80211_node_authorize(ni);
 832                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 833                     mesh_rt_cleanup_cb, vap);
 834                 mesh_gatemode_setup(vap);
 835                 break;
 836         default:
 837                 break;
 838         }
 839         /* NB: ostate not nstate */
 840         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
 841         return 0;
 842 }
 843
 844 static void
 845 mesh_rt_cleanup_cb(void *arg)
 846 {
 847         struct ieee80211vap *vap = arg;
 848         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 849
 850         mesh_rt_flush_invalid(vap);
 851         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 852             mesh_rt_cleanup_cb, vap);
 853 }
 854
 855 /*
 856  * Mark a mesh STA as gate and return a pointer to it.
 857  * If this is first time, we create a new gate route.
 858  * Always update the path route to this mesh gate.
 859  */
 860 struct ieee80211_mesh_gate_route *
 861 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
 862     struct ieee80211_mesh_route *rt)
 863 {
 864         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 865         struct ieee80211_mesh_gate_route *gr = NULL, *next;
 866         int found = 0;
 867
 868         MESH_RT_LOCK(ms);
 869         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
 870                 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
 871                         found = 1;
 872                         break;
 873                 }
 874         }
 875
 876         if (!found) {
 877                 /* New mesh gate add it to known table. */
 878                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
 879                     "%s", "stored new gate information from pro-PREQ.");
 880                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
 881                     M_80211_MESH_GT_RT,
 882                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 883                 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
 884                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
 885         }
 886         gr->gr_route = rt;
 887         /* TODO: link from path route to gate route */
 888         MESH_RT_UNLOCK(ms);
 889
 890         return gr;
 891 }
 892
 893
 894 /*
 895  * Helper function to note the Mesh Peer Link FSM change.
 896  */
 897 static void
 898 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
 899 {
 900         struct ieee80211vap *vap = ni->ni_vap;
 901         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 902 #ifdef IEEE80211_DEBUG
 903         static const char *meshlinkstates[] = {
 904                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
 905                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
 906                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
 907                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
 908                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
 909                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
 910         };
 911 #endif
 912         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
 913             ni, "peer link: %s -> %s",
 914             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
 915
 916         /* track neighbor count */
 917         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
 918             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 919                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
 920                 ms->ms_neighbors++;
 921                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 922         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
 923             state != IEEE80211_NODE_MESH_ESTABLISHED) {
 924                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
 925                 ms->ms_neighbors--;
 926                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 927         }
 928         ni->ni_mlstate = state;
 929         switch (state) {
 930         case IEEE80211_NODE_MESH_HOLDING:
 931                 ms->ms_ppath->mpp_peerdown(ni);
 932                 break;
 933         case IEEE80211_NODE_MESH_ESTABLISHED:
 934                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
 935                 break;
 936         default:
 937                 break;
 938         }
 939 }
 940
 941 /*
 942  * Helper function to generate a unique local ID required for mesh
 943  * peer establishment.
 944  */
 945 static void
 946 mesh_checkid(void *arg, struct ieee80211_node *ni)
 947 {
 948         uint16_t *r = arg;
 949
 950         if (*r == ni->ni_mllid)
 951                 *(uint16_t *)arg = 0;
 952 }
 953
 954 static uint32_t
 955 mesh_generateid(struct ieee80211vap *vap)
 956 {
 957         int maxiter = 4;
 958         uint16_t r;
 959
 960         do {
 961                 get_random_bytes(&r, 2);
 962                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
 963                 maxiter--;
 964         } while (r == 0 && maxiter > 0);
 965         return r;
 966 }
 967
 968 /*
 969  * Verifies if we already received this packet by checking its
 970  * sequence number.
 971  * Returns 0 if the frame is to be accepted, 1 otherwise.
 972  */
 973 static int
 974 mesh_checkpseq(struct ieee80211vap *vap,
 975     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
 976 {
 977         struct ieee80211_mesh_route *rt;
 978
 979         rt = ieee80211_mesh_rt_find(vap, source);
 980         if (rt == NULL) {
 981                 rt = ieee80211_mesh_rt_add(vap, source);
 982                 if (rt == NULL) {
 983                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 984                             "%s", "add mcast route failed");
 985                         vap->iv_stats.is_mesh_rtaddfailed++;
 986                         return 1;
 987                 }
 988                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 989                     "add mcast route, mesh seqno %d", seq);
 990                 rt->rt_lastmseq = seq;
 991                 return 0;
 992         }
 993         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
 994                 return 1;
 995         } else {
 996                 rt->rt_lastmseq = seq;
 997                 return 0;
 998         }
 999 }
1000
1001 /*
1002  * Iterate the routing table and locate the next hop.
1003  */
1004 struct ieee80211_node *
1005 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1006     const uint8_t dest[IEEE80211_ADDR_LEN])
1007 {
1008         struct ieee80211_mesh_route *rt;
1009
1010         rt = ieee80211_mesh_rt_find(vap, dest);
1011         if (rt == NULL)
1012                 return NULL;
1013         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1014                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1015                     "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1016                 /* XXX stat */
1017                 return NULL;
1018         }
1019         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1020                 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1021                 if (rt == NULL) return NULL;
1022                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1023                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1024                             "%s: meshgate !valid, flags 0x%x", __func__,
1025                             rt->rt_flags);
1026                         /* XXX stat */
1027                         return NULL;
1028                 }
1029         }
1030         return ieee80211_find_txnode(vap, rt->rt_nexthop);
1031 }
1032
1033 static void
1034 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1035     struct ieee80211_mesh_route *rt_gate)
1036 {
1037         struct ifnet *ifp = vap->iv_ifp;
1038         struct ieee80211_node *ni;
1039
1040         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1041
1042         ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1043         if (ni == NULL) {
1044                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1045                 m_freem(m);
1046                 return;
1047         }
1048
1049         /*
1050          * Send through the VAP packet transmit path.
1051          * This consumes the node ref grabbed above and
1052          * the mbuf, regardless of whether there's a problem
1053          * or not.
1054          */
1055         (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1056 }
1057
1058 /*
1059  * Forward the queued frames to known valid mesh gates.
1060  * Assume destination to be outside the MBSS (i.e. proxy entry),
1061  * If no valid mesh gates are known silently discard queued frames.
1062  * After transmitting frames to all known valid mesh gates, this route
1063  * will be marked invalid, and a new path discovery will happen in the hopes
1064  * that (at least) one of the mesh gates have a new proxy entry for us to use.
1065  */
1066 void
1067 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1068     struct ieee80211_mesh_route *rt_dest)
1069 {
1070         struct ieee80211com *ic = vap->iv_ic;
1071         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1072         struct ieee80211_mesh_route *rt_gate;
1073         struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1074         struct mbuf *m, *mcopy, *next;
1075
1076         IEEE80211_TX_UNLOCK_ASSERT(ic);
1077
1078         KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1079             ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1080
1081         /* XXX: send to more than one valid mash gate */
1082         MESH_RT_LOCK(ms);
1083
1084         m = ieee80211_ageq_remove(&ic->ic_stageq,
1085             (struct ieee80211_node *)(uintptr_t)
1086             ieee80211_mac_hash(ic, rt_dest->rt_dest));
1087
1088         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1089                 rt_gate = gr->gr_route;
1090                 if (rt_gate == NULL) {
1091                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1092                                 rt_dest->rt_dest,
1093                                 "mesh gate with no path %6D",
1094                                 gr->gr_addr, ":");
1095                         continue;
1096                 }
1097                 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1098                         continue;
1099                 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1100                     ("route not marked as a mesh gate"));
1101                 KASSERT((rt_gate->rt_flags &
1102                         IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1103                         ("found mesh gate that is also marked porxy"));
1104                 /*
1105                  * convert route to a proxy route gated by the current
1106                  * mesh gate, this is needed so encap can built data
1107                  * frame with correct address.
1108                  */
1109                 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1110                         IEEE80211_MESHRT_FLAGS_VALID;
1111                 rt_dest->rt_ext_seq = 1; /* random value */
1112                 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1113                 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1114                 rt_dest->rt_metric = rt_gate->rt_metric;
1115                 rt_dest->rt_nhops = rt_gate->rt_nhops;
1116                 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1117                 MESH_RT_UNLOCK(ms);
1118                 /* XXX: lock?? */
1119                 mcopy = m_dup(m, M_NOWAIT);
1120                 for (; mcopy != NULL; mcopy = next) {
1121                         next = mcopy->m_nextpkt;
1122                         mcopy->m_nextpkt = NULL;
1123                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1124                             rt_dest->rt_dest,
1125                             "flush queued frame %p len %d", mcopy,
1126                             mcopy->m_pkthdr.len);
1127                         mesh_transmit_to_gate(vap, mcopy, rt_gate);
1128                 }
1129                 MESH_RT_LOCK(ms);
1130         }
1131         rt_dest->rt_flags = 0; /* Mark invalid */
1132         m_freem(m);
1133         MESH_RT_UNLOCK(ms);
1134 }
1135
1136 /*
1137  * Forward the specified frame.
1138  * Decrement the TTL and set TA to our MAC address.
1139  */
1140 static void
1141 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1142     const struct ieee80211_meshcntl *mc)
1143 {
1144         struct ieee80211com *ic = vap->iv_ic;
1145         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1146         struct ifnet *ifp = vap->iv_ifp;
1147         const struct ieee80211_frame *wh =
1148             mtod(m, const struct ieee80211_frame *);
1149         struct mbuf *mcopy;
1150         struct ieee80211_meshcntl *mccopy;
1151         struct ieee80211_frame *whcopy;
1152         struct ieee80211_node *ni;
1153         int err;
1154
1155         /* This is called from the RX path - don't hold this lock */
1156         IEEE80211_TX_UNLOCK_ASSERT(ic);
1157
1158         /*
1159          * mesh ttl of 1 means we are the last one receiving it,
1160          * according to amendment we decrement and then check if
1161          * 0, if so we dont forward.
1162          */
1163         if (mc->mc_ttl < 1) {
1164                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1165                     "%s", "frame not fwd'd, ttl 1");
1166                 vap->iv_stats.is_mesh_fwd_ttl++;
1167                 return;
1168         }
1169         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1170                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1171                     "%s", "frame not fwd'd, fwding disabled");
1172                 vap->iv_stats.is_mesh_fwd_disabled++;
1173                 return;
1174         }
1175         mcopy = m_dup(m, M_NOWAIT);
1176         if (mcopy == NULL) {
1177                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1178                     "%s", "frame not fwd'd, cannot dup");
1179                 vap->iv_stats.is_mesh_fwd_nobuf++;
1180                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1181                 return;
1182         }
1183         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1184             sizeof(struct ieee80211_meshcntl));
1185         if (mcopy == NULL) {
1186                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1187                     "%s", "frame not fwd'd, too short");
1188                 vap->iv_stats.is_mesh_fwd_tooshort++;
1189                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1190                 m_freem(mcopy);
1191                 return;
1192         }
1193         whcopy = mtod(mcopy, struct ieee80211_frame *);
1194         mccopy = (struct ieee80211_meshcntl *)
1195             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1196         /* XXX clear other bits? */
1197         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1198         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1199         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1200                 ni = ieee80211_ref_node(vap->iv_bss);
1201                 mcopy->m_flags |= M_MCAST;
1202         } else {
1203                 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1204                 if (ni == NULL) {
1205                         /*
1206                          * [Optional] any of the following three actions:
1207                          * o silently discard
1208                          * o trigger a path discovery
1209                          * o inform TA that meshDA is unknown.
1210                          */
1211                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1212                             "%s", "frame not fwd'd, no path");
1213                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1214                             IEEE80211_REASON_MESH_PERR_NO_FI);
1215                         vap->iv_stats.is_mesh_fwd_nopath++;
1216                         m_freem(mcopy);
1217                         return;
1218                 }
1219                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1220         }
1221         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1222         mccopy->mc_ttl--;
1223
1224         /* XXX calculate priority so drivers can find the tx queue */
1225         M_WME_SETAC(mcopy, WME_AC_BE);
1226
1227         /* XXX do we know m_nextpkt is NULL? */
1228         mcopy->m_pkthdr.rcvif = (void *) ni;
1229
1230         /*
1231          * XXX this bypasses all of the VAP TX handling; it passes frames
1232          * directly to the parent interface.
1233          *
1234          * Because of this, there's no TX lock being held as there's no
1235          * encaps state being used.
1236          *
1237          * Doing a direct parent transmit may not be the correct thing
1238          * to do here; we'll have to re-think this soon.
1239          */
1240         IEEE80211_TX_LOCK(ic);
1241         err = ieee80211_parent_xmitpkt(ic, mcopy);
1242         IEEE80211_TX_UNLOCK(ic);
1243         if (!err)
1244                 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
1245 }
1246
1247 static struct mbuf *
1248 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1249 {
1250 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1251 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1252         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1253                   sizeof(struct ieee80211_meshcntl_ae10)];
1254         const struct ieee80211_qosframe_addr4 *wh;
1255         const struct ieee80211_meshcntl_ae10 *mc;
1256         struct ether_header *eh;
1257         struct llc *llc;
1258         int ae;
1259
1260         if (m->m_len < hdrlen + sizeof(*llc) &&
1261             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1262                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1263                     "discard data frame: %s", "m_pullup failed");
1264                 vap->iv_stats.is_rx_tooshort++;
1265                 return NULL;
1266         }
1267         memcpy(b, mtod(m, caddr_t), hdrlen);
1268         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1269         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1270         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1271                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1272             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1273
1274         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1275         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1276             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1277             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1278             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1279             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1280               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1281                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1282                 llc = NULL;
1283         } else {
1284                 m_adj(m, hdrlen - sizeof(*eh));
1285         }
1286         eh = mtod(m, struct ether_header *);
1287         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1288         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1289                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1290                 if (ae == IEEE80211_MESH_AE_00) {
1291                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1292                 } else if (ae == IEEE80211_MESH_AE_01) {
1293                         IEEE80211_ADDR_COPY(eh->ether_shost,
1294                             MC01(mc)->mc_addr4);
1295                 } else {
1296                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1297                             (const struct ieee80211_frame *)wh, NULL,
1298                             "bad AE %d", ae);
1299                         vap->iv_stats.is_mesh_badae++;
1300                         m_freem(m);
1301                         return NULL;
1302                 }
1303         } else {
1304                 if (ae == IEEE80211_MESH_AE_00) {
1305                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1306                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1307                 } else if (ae == IEEE80211_MESH_AE_10) {
1308                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1309                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1310                 } else {
1311                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1312                             (const struct ieee80211_frame *)wh, NULL,
1313                             "bad AE %d", ae);
1314                         vap->iv_stats.is_mesh_badae++;
1315                         m_freem(m);
1316                         return NULL;
1317                 }
1318         }
1319 #ifndef __NO_STRICT_ALIGNMENT
1320         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1321                 m = ieee80211_realign(vap, m, sizeof(*eh));
1322                 if (m == NULL)
1323                         return NULL;
1324         }
1325 #endif /* !__NO_STRICT_ALIGNMENT */
1326         if (llc != NULL) {
1327                 eh = mtod(m, struct ether_header *);
1328                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1329         }
1330         return m;
1331 #undef  WDIR
1332 #undef  MC01
1333 }
1334
1335 /*
1336  * Return non-zero if the unicast mesh data frame should be processed
1337  * locally.  Frames that are not proxy'd have our address, otherwise
1338  * we need to consult the routing table to look for a proxy entry.
1339  */
1340 static __inline int
1341 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1342     const struct ieee80211_meshcntl *mc)
1343 {
1344         int ae = mc->mc_flags & 3;
1345
1346         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1347             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1348         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1349             ("bad AE %d", ae));
1350         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
1351                 const struct ieee80211_meshcntl_ae10 *mc10 =
1352                     (const struct ieee80211_meshcntl_ae10 *) mc;
1353                 struct ieee80211_mesh_route *rt =
1354                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1355                 /* check for proxy route to ourself */
1356                 return (rt != NULL &&
1357                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1358         } else                                  /* ucast w/o proxy */
1359                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1360 }
1361
1362 /*
1363  * Verifies transmitter, updates lifetime, precursor list and forwards data.
1364  * > 0 means we have forwarded data and no need to process locally
1365  * == 0 means we want to process locally (and we may have forwarded data
1366  * < 0 means there was an error and data should be discarded
1367  */
1368 static int
1369 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1370     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1371 {
1372         struct ieee80211_qosframe_addr4 *qwh;
1373         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1374         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1375
1376         /* This is called from the RX path - don't hold this lock */
1377         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1378
1379         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1380
1381         /*
1382          * TODO:
1383          * o verify addr2 is  a legitimate transmitter
1384          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1385          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1386          */
1387
1388         /* set lifetime of addr3 (meshDA) to initial value */
1389         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1390         if (rt_meshda == NULL) {
1391                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1392                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
1393                 /*
1394                  * [Optional] any of the following three actions:
1395                  * o silently discard                           [X]
1396                  * o trigger a path discovery                   [ ]
1397                  * o inform TA that meshDA is unknown.          [ ]
1398                  */
1399                 /* XXX: stats */
1400                 return (-1);
1401         }
1402
1403         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1404             ms->ms_ppath->mpp_inact));
1405
1406         /* set lifetime of addr4 (meshSA) to initial value */
1407         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1408         KASSERT(rt_meshsa != NULL, ("no route"));
1409         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1410             ms->ms_ppath->mpp_inact));
1411
1412         mesh_forward(vap, m, mc);
1413         return (1); /* dont process locally */
1414 }
1415
1416 /*
1417  * Verifies transmitter, updates lifetime, precursor list and process data
1418  * locally, if data is proxy with AE = 10 it could mean data should go
1419  * on another mesh path or data should be forwarded to the DS.
1420  *
1421  * > 0 means we have forwarded data and no need to process locally
1422  * == 0 means we want to process locally (and we may have forwarded data
1423  * < 0 means there was an error and data should be discarded
1424  */
1425 static int
1426 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1427     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1428 {
1429         struct ieee80211_qosframe_addr4 *qwh;
1430         const struct ieee80211_meshcntl_ae10 *mc10;
1431         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1432         struct ieee80211_mesh_route *rt;
1433         int ae;
1434
1435         /* This is called from the RX path - don't hold this lock */
1436         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1437
1438         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1439         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1440
1441         /*
1442          * TODO:
1443          * o verify addr2 is  a legitimate transmitter
1444          * o lifetime of precursor entry is max(init, curr)
1445          */
1446
1447         /* set lifetime of addr4 (meshSA) to initial value */
1448         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1449         KASSERT(rt != NULL, ("no route"));
1450         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1451         rt = NULL;
1452
1453         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1454         KASSERT(ae == IEEE80211_MESH_AE_00 ||
1455             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1456         if (ae == IEEE80211_MESH_AE_10) {
1457                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1458                         return (0); /* process locally */
1459                 }
1460
1461                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1462                 if (rt != NULL &&
1463                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1464                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1465                         /*
1466                          * Forward on another mesh-path, according to
1467                          * amendment as specified in 9.32.4.1
1468                          */
1469                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1470                         mesh_forward(vap, m,
1471                             (const struct ieee80211_meshcntl *)mc10);
1472                         return (1); /* dont process locally */
1473                 }
1474                 /*
1475                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
1476                  * addressed according to 13.11.3.2.
1477                  */
1478                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1479                     "forward frame to DS, SA(%6D) DA(%6D)",
1480                     mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1481         }
1482         return (0); /* process locally */
1483 }
1484
1485 /*
1486  * Try to forward the group addressed data on to other mesh STAs, and
1487  * also to the DS.
1488  *
1489  * > 0 means we have forwarded data and no need to process locally
1490  * == 0 means we want to process locally (and we may have forwarded data
1491  * < 0 means there was an error and data should be discarded
1492  */
1493 static int
1494 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1495     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1496 {
1497 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1498         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1499
1500         /* This is called from the RX path - don't hold this lock */
1501         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1502
1503         mesh_forward(vap, m, mc);
1504
1505         if(mc->mc_ttl > 0) {
1506                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1507                         /*
1508                          * Forward of MSDUs from the MBSS to DS group addressed
1509                          * (according to 13.11.3.2)
1510                          * This happens by delivering the packet, and a bridge
1511                          * will sent it on another port member.
1512                          */
1513                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1514                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD) {
1515                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1516                                     MC01(mc)->mc_addr4, "%s",
1517                                     "forward from MBSS to the DS");
1518                         }
1519                 }
1520         }
1521         return (0); /* process locally */
1522 #undef  MC01
1523 }
1524
1525 static int
1526 mesh_input(struct ieee80211_node *ni, struct mbuf *m,
1527     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1528 {
1529 #define HAS_SEQ(type)   ((type & 0x4) == 0)
1530 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1531         struct ieee80211vap *vap = ni->ni_vap;
1532         struct ieee80211com *ic = ni->ni_ic;
1533         struct ifnet *ifp = vap->iv_ifp;
1534         struct ieee80211_frame *wh;
1535         const struct ieee80211_meshcntl *mc;
1536         int hdrspace, meshdrlen, need_tap, error;
1537         uint8_t dir, type, subtype, ae;
1538         uint32_t seq;
1539         const uint8_t *addr;
1540         uint8_t qos[2];
1541
1542         KASSERT(ni != NULL, ("null node"));
1543         ni->ni_inact = ni->ni_inact_reload;
1544
1545         need_tap = 1;                   /* mbuf need to be tapped. */
1546         type = -1;                      /* undefined */
1547
1548         /* This is called from the RX path - don't hold this lock */
1549         IEEE80211_TX_UNLOCK_ASSERT(ic);
1550
1551         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1552                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1553                     ni->ni_macaddr, NULL,
1554                     "too short (1): len %u", m->m_pkthdr.len);
1555                 vap->iv_stats.is_rx_tooshort++;
1556                 goto out;
1557         }
1558         /*
1559          * Bit of a cheat here, we use a pointer for a 3-address
1560          * frame format but don't reference fields past outside
1561          * ieee80211_frame_min w/o first validating the data is
1562          * present.
1563         */
1564         wh = mtod(m, struct ieee80211_frame *);
1565
1566         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1567             IEEE80211_FC0_VERSION_0) {
1568                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1569                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1570                 vap->iv_stats.is_rx_badversion++;
1571                 goto err;
1572         }
1573         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1574         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1575         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1576         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1577                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1578                 ni->ni_noise = nf;
1579                 if (HAS_SEQ(type)) {
1580                         uint8_t tid = ieee80211_gettid(wh);
1581
1582                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
1583                             TID_TO_WME_AC(tid) >= WME_AC_VI)
1584                                 ic->ic_wme.wme_hipri_traffic++;
1585                         if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs))
1586                                 goto out;
1587                 }
1588         }
1589 #ifdef IEEE80211_DEBUG
1590         /*
1591          * It's easier, but too expensive, to simulate different mesh
1592          * topologies by consulting the ACL policy very early, so do this
1593          * only under DEBUG.
1594          *
1595          * NB: this check is also done upon peering link initiation.
1596          */
1597         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1598                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1599                     wh, NULL, "%s", "disallowed by ACL");
1600                 vap->iv_stats.is_rx_acl++;
1601                 goto out;
1602         }
1603 #endif
1604         switch (type) {
1605         case IEEE80211_FC0_TYPE_DATA:
1606                 if (ni == vap->iv_bss)
1607                         goto out;
1608                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1609                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1610                             ni->ni_macaddr, NULL,
1611                             "peer link not yet established (%d)",
1612                             ni->ni_mlstate);
1613                         vap->iv_stats.is_mesh_nolink++;
1614                         goto out;
1615                 }
1616                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1617                     dir != IEEE80211_FC1_DIR_DSTODS) {
1618                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1619                             wh, "data", "incorrect dir 0x%x", dir);
1620                         vap->iv_stats.is_rx_wrongdir++;
1621                         goto err;
1622                 }
1623
1624                 /* All Mesh data frames are QoS subtype */
1625                 if (!HAS_SEQ(type)) {
1626                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1627                             wh, "data", "incorrect subtype 0x%x", subtype);
1628                         vap->iv_stats.is_rx_badsubtype++;
1629                         goto err;
1630                 }
1631
1632                 /*
1633                  * Next up, any fragmentation.
1634                  * XXX: we defrag before we even try to forward,
1635                  * Mesh Control field is not present in sub-sequent
1636                  * fragmented frames. This is in contrast to Draft 4.0.
1637                  */
1638                 hdrspace = ieee80211_hdrspace(ic, wh);
1639                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1640                         m = ieee80211_defrag(ni, m, hdrspace);
1641                         if (m == NULL) {
1642                                 /* Fragment dropped or frame not complete yet */
1643                                 goto out;
1644                         }
1645                 }
1646                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1647
1648                 /*
1649                  * Now we have a complete Mesh Data frame.
1650                  */
1651
1652                 /*
1653                  * Only fromDStoDS data frames use 4 address qos frames
1654                  * as specified in amendment. Otherwise addr4 is located
1655                  * in the Mesh Control field and a 3 address qos frame
1656                  * is used.
1657                  */
1658                 if (IEEE80211_IS_DSTODS(wh))
1659                         *(uint16_t *)qos = *(uint16_t *)
1660                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos;
1661                 else
1662                         *(uint16_t *)qos = *(uint16_t *)
1663                             ((struct ieee80211_qosframe *)wh)->i_qos;
1664
1665                 /*
1666                  * NB: The mesh STA sets the Mesh Control Present
1667                  * subfield to 1 in the Mesh Data frame containing
1668                  * an unfragmented MSDU, an A-MSDU, or the first
1669                  * fragment of an MSDU.
1670                  * After defrag it should always be present.
1671                  */
1672                 if (!(qos[1] & IEEE80211_QOS_MC)) {
1673                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1674                             ni->ni_macaddr, NULL,
1675                             "%s", "Mesh control field not present");
1676                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1677                         goto err;
1678                 }
1679
1680                 /* pull up enough to get to the mesh control */
1681                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1682                     (m = m_pullup(m, hdrspace +
1683                         sizeof(struct ieee80211_meshcntl))) == NULL) {
1684                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1685                             ni->ni_macaddr, NULL,
1686                             "data too short: expecting %u", hdrspace);
1687                         vap->iv_stats.is_rx_tooshort++;
1688                         goto out;               /* XXX */
1689                 }
1690                 /*
1691                  * Now calculate the full extent of the headers. Note
1692                  * mesh_decap will pull up anything we didn't get
1693                  * above when it strips the 802.11 headers.
1694                  */
1695                 mc = (const struct ieee80211_meshcntl *)
1696                     (mtod(m, const uint8_t *) + hdrspace);
1697                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1698                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1699                     ae * IEEE80211_ADDR_LEN;
1700                 hdrspace += meshdrlen;
1701
1702                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1703                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1704                     (m->m_len < hdrspace) &&
1705                     ((m = m_pullup(m, hdrspace)) == NULL)) {
1706                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1707                             ni->ni_macaddr, NULL,
1708                             "data too short: expecting %u", hdrspace);
1709                         vap->iv_stats.is_rx_tooshort++;
1710                         goto out;               /* XXX */
1711                 }
1712                 /* XXX: are we sure there is no reallocating after m_pullup? */
1713
1714                 seq = le32dec(mc->mc_seq);
1715                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1716                         addr = wh->i_addr3;
1717                 else if (ae == IEEE80211_MESH_AE_01)
1718                         addr = MC01(mc)->mc_addr4;
1719                 else
1720                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1721                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1722                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1723                             addr, "data", "%s", "not to me");
1724                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1725                         goto out;
1726                 }
1727                 if (mesh_checkpseq(vap, addr, seq) != 0) {
1728                         vap->iv_stats.is_rx_dup++;
1729                         goto out;
1730                 }
1731
1732                 /* This code "routes" the frame to the right control path */
1733                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1734                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1735                                 error =
1736                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1737                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1738                                 error = mesh_recv_group_data(vap, m, wh, mc);
1739                         else
1740                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1741                                     wh, mc);
1742                 } else
1743                         error = mesh_recv_group_data(vap, m, wh, mc);
1744                 if (error < 0)
1745                         goto err;
1746                 else if (error > 0)
1747                         goto out;
1748
1749                 if (ieee80211_radiotap_active_vap(vap))
1750                         ieee80211_radiotap_rx(vap, m);
1751                 need_tap = 0;
1752
1753                 /*
1754                  * Finally, strip the 802.11 header.
1755                  */
1756                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1757                 if (m == NULL) {
1758                         /* XXX mask bit to check for both */
1759                         /* don't count Null data frames as errors */
1760                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1761                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1762                                 goto out;
1763                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1764                             ni->ni_macaddr, "data", "%s", "decap error");
1765                         vap->iv_stats.is_rx_decap++;
1766                         IEEE80211_NODE_STAT(ni, rx_decap);
1767                         goto err;
1768                 }
1769                 if (qos[0] & IEEE80211_QOS_AMSDU) {
1770                         m = ieee80211_decap_amsdu(ni, m);
1771                         if (m == NULL)
1772                                 return IEEE80211_FC0_TYPE_DATA;
1773                 }
1774                 ieee80211_deliver_data(vap, ni, m);
1775                 return type;
1776         case IEEE80211_FC0_TYPE_MGT:
1777                 vap->iv_stats.is_rx_mgmt++;
1778                 IEEE80211_NODE_STAT(ni, rx_mgmt);
1779                 if (dir != IEEE80211_FC1_DIR_NODS) {
1780                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1781                             wh, "mgt", "incorrect dir 0x%x", dir);
1782                         vap->iv_stats.is_rx_wrongdir++;
1783                         goto err;
1784                 }
1785                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1786                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1787                             ni->ni_macaddr, "mgt", "too short: len %u",
1788                             m->m_pkthdr.len);
1789                         vap->iv_stats.is_rx_tooshort++;
1790                         goto out;
1791                 }
1792 #ifdef IEEE80211_DEBUG
1793                 if ((ieee80211_msg_debug(vap) &&
1794                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1795                     ieee80211_msg_dumppkts(vap)) {
1796                         if_printf(ifp, "received %s from %s rssi %d\n",
1797                             ieee80211_mgt_subtype_name(subtype),
1798                             ether_sprintf(wh->i_addr2), rssi);
1799                 }
1800 #endif
1801                 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1802                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1803                             wh, NULL, "%s", "WEP set but not permitted");
1804                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1805                         goto out;
1806                 }
1807                 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
1808                 goto out;
1809         case IEEE80211_FC0_TYPE_CTL:
1810                 vap->iv_stats.is_rx_ctl++;
1811                 IEEE80211_NODE_STAT(ni, rx_ctrl);
1812                 goto out;
1813         default:
1814                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1815                     wh, "bad", "frame type 0x%x", type);
1816                 /* should not come here */
1817                 break;
1818         }
1819 err:
1820         if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
1821 out:
1822         if (m != NULL) {
1823                 if (need_tap && ieee80211_radiotap_active_vap(vap))
1824                         ieee80211_radiotap_rx(vap, m);
1825                 m_freem(m);
1826         }
1827         return type;
1828 #undef  HAS_SEQ
1829 #undef  MC01
1830 }
1831
1832 static void
1833 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1834     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1835 {
1836         struct ieee80211vap *vap = ni->ni_vap;
1837         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1838         struct ieee80211com *ic = ni->ni_ic;
1839         struct ieee80211_channel *rxchan = ic->ic_curchan;
1840         struct ieee80211_frame *wh;
1841         struct ieee80211_mesh_route *rt;
1842         uint8_t *frm, *efrm;
1843
1844         wh = mtod(m0, struct ieee80211_frame *);
1845         frm = (uint8_t *)&wh[1];
1846         efrm = mtod(m0, uint8_t *) + m0->m_len;
1847         switch (subtype) {
1848         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1849         case IEEE80211_FC0_SUBTYPE_BEACON:
1850         {
1851                 struct ieee80211_scanparams scan;
1852                 struct ieee80211_channel *c;
1853                 /*
1854                  * We process beacon/probe response
1855                  * frames to discover neighbors.
1856                  */
1857                 if (rxs != NULL) {
1858                         c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1859                         if (c != NULL)
1860                                 rxchan = c;
1861                 }
1862                 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
1863                         return;
1864                 /*
1865                  * Count frame now that we know it's to be processed.
1866                  */
1867                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1868                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
1869                         IEEE80211_NODE_STAT(ni, rx_beacons);
1870                 } else
1871                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1872                 /*
1873                  * If scanning, just pass information to the scan module.
1874                  */
1875                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1876                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1877                                 /*
1878                                  * Actively scanning a channel marked passive;
1879                                  * send a probe request now that we know there
1880                                  * is 802.11 traffic present.
1881                                  *
1882                                  * XXX check if the beacon we recv'd gives
1883                                  * us what we need and suppress the probe req
1884                                  */
1885                                 ieee80211_probe_curchan(vap, 1);
1886                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1887                         }
1888                         ieee80211_add_scan(vap, rxchan, &scan, wh,
1889                             subtype, rssi, nf);
1890                         return;
1891                 }
1892
1893                 /* The rest of this code assumes we are running */
1894                 if (vap->iv_state != IEEE80211_S_RUN)
1895                         return;
1896                 /*
1897                  * Ignore non-mesh STAs.
1898                  */
1899                 if ((scan.capinfo &
1900                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1901                     scan.meshid == NULL || scan.meshconf == NULL) {
1902                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1903                             wh, "beacon", "%s", "not a mesh sta");
1904                         vap->iv_stats.is_mesh_wrongmesh++;
1905                         return;
1906                 }
1907                 /*
1908                  * Ignore STAs for other mesh networks.
1909                  */
1910                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1911                     mesh_verify_meshconf(vap, scan.meshconf)) {
1912                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1913                             wh, "beacon", "%s", "not for our mesh");
1914                         vap->iv_stats.is_mesh_wrongmesh++;
1915                         return;
1916                 }
1917                 /*
1918                  * Peer only based on the current ACL policy.
1919                  */
1920                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1921                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1922                             wh, NULL, "%s", "disallowed by ACL");
1923                         vap->iv_stats.is_rx_acl++;
1924                         return;
1925                 }
1926                 /*
1927                  * Do neighbor discovery.
1928                  */
1929                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1930                         /*
1931                          * Create a new entry in the neighbor table.
1932                          */
1933                         ni = ieee80211_add_neighbor(vap, wh, &scan);
1934                 }
1935                 /*
1936                  * Automatically peer with discovered nodes if possible.
1937                  */
1938                 if (ni != vap->iv_bss &&
1939                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1940                         switch (ni->ni_mlstate) {
1941                         case IEEE80211_NODE_MESH_IDLE:
1942                         {
1943                                 uint16_t args[1];
1944
1945                                 /* Wait for backoff callout to reset counter */
1946                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1947                                         return;
1948
1949                                 ni->ni_mlpid = mesh_generateid(vap);
1950                                 if (ni->ni_mlpid == 0)
1951                                         return;
1952                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1953                                 args[0] = ni->ni_mlpid;
1954                                 ieee80211_send_action(ni,
1955                                 IEEE80211_ACTION_CAT_SELF_PROT,
1956                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1957                                 ni->ni_mlrcnt = 0;
1958                                 mesh_peer_timeout_setup(ni);
1959                                 break;
1960                         }
1961                         case IEEE80211_NODE_MESH_ESTABLISHED:
1962                         {
1963                                 /*
1964                                  * Valid beacon from a peer mesh STA
1965                                  * bump TA lifetime
1966                                  */
1967                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1968                                 if(rt != NULL) {
1969                                         ieee80211_mesh_rt_update(rt,
1970                                             ticks_to_msecs(
1971                                             ms->ms_ppath->mpp_inact));
1972                                 }
1973                                 break;
1974                         }
1975                         default:
1976                                 break; /* ignore */
1977                         }
1978                 }
1979                 break;
1980         }
1981         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1982         {
1983                 uint8_t *ssid, *meshid, *rates, *xrates;
1984
1985                 if (vap->iv_state != IEEE80211_S_RUN) {
1986                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1987                             wh, NULL, "wrong state %s",
1988                             ieee80211_state_name[vap->iv_state]);
1989                         vap->iv_stats.is_rx_mgtdiscard++;
1990                         return;
1991                 }
1992                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1993                         /* frame must be directed */
1994                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1995                             wh, NULL, "%s", "not unicast");
1996                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
1997                         return;
1998                 }
1999                 /*
2000                  * prreq frame format
2001                  *      [tlv] ssid
2002                  *      [tlv] supported rates
2003                  *      [tlv] extended supported rates
2004                  *      [tlv] mesh id
2005                  */
2006                 ssid = meshid = rates = xrates = NULL;
2007                 while (efrm - frm > 1) {
2008                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2009                         switch (*frm) {
2010                         case IEEE80211_ELEMID_SSID:
2011                                 ssid = frm;
2012                                 break;
2013                         case IEEE80211_ELEMID_RATES:
2014                                 rates = frm;
2015                                 break;
2016                         case IEEE80211_ELEMID_XRATES:
2017                                 xrates = frm;
2018                                 break;
2019                         case IEEE80211_ELEMID_MESHID:
2020                                 meshid = frm;
2021                                 break;
2022                         }
2023                         frm += frm[1] + 2;
2024                 }
2025                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2026                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2027                 if (xrates != NULL)
2028                         IEEE80211_VERIFY_ELEMENT(xrates,
2029                             IEEE80211_RATE_MAXSIZE - rates[1], return);
2030                 if (meshid != NULL) {
2031                         IEEE80211_VERIFY_ELEMENT(meshid,
2032                             IEEE80211_MESHID_LEN, return);
2033                         /* NB: meshid, not ssid */
2034                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2035                 }
2036
2037                 /* XXX find a better class or define it's own */
2038                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2039                     "%s", "recv probe req");
2040                 /*
2041                  * Some legacy 11b clients cannot hack a complete
2042                  * probe response frame.  When the request includes
2043                  * only a bare-bones rate set, communicate this to
2044                  * the transmit side.
2045                  */
2046                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2047                 break;
2048         }
2049
2050         case IEEE80211_FC0_SUBTYPE_ACTION:
2051         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2052                 if (ni == vap->iv_bss) {
2053                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2054                             wh, NULL, "%s", "unknown node");
2055                         vap->iv_stats.is_rx_mgtdiscard++;
2056                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2057                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2058                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2059                             wh, NULL, "%s", "not for us");
2060                         vap->iv_stats.is_rx_mgtdiscard++;
2061                 } else if (vap->iv_state != IEEE80211_S_RUN) {
2062                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2063                             wh, NULL, "wrong state %s",
2064                             ieee80211_state_name[vap->iv_state]);
2065                         vap->iv_stats.is_rx_mgtdiscard++;
2066                 } else {
2067                         if (ieee80211_parse_action(ni, m0) == 0)
2068                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2069                 }
2070                 break;
2071
2072         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2073         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2074         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2075         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2076         case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2077         case IEEE80211_FC0_SUBTYPE_ATIM:
2078         case IEEE80211_FC0_SUBTYPE_DISASSOC:
2079         case IEEE80211_FC0_SUBTYPE_AUTH:
2080         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2081                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2082                     wh, NULL, "%s", "not handled");
2083                 vap->iv_stats.is_rx_mgtdiscard++;
2084                 break;
2085
2086         default:
2087                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2088                     wh, "mgt", "subtype 0x%x not handled", subtype);
2089                 vap->iv_stats.is_rx_badsubtype++;
2090                 break;
2091         }
2092 }
2093
2094 static void
2095 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2096 {
2097
2098         switch (subtype) {
2099         case IEEE80211_FC0_SUBTYPE_BAR:
2100                 ieee80211_recv_bar(ni, m);
2101                 break;
2102         }
2103 }
2104
2105 /*
2106  * Parse meshpeering action ie's for MPM frames
2107  */
2108 static const struct ieee80211_meshpeer_ie *
2109 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2110         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
2111         const uint8_t *frm, const uint8_t *efrm,
2112         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2113 {
2114         struct ieee80211vap *vap = ni->ni_vap;
2115         const struct ieee80211_meshpeer_ie *mpie;
2116         uint16_t args[3];
2117         const uint8_t *meshid, *meshconf;
2118         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2119
2120         meshid = meshconf = NULL;
2121         while (efrm - frm > 1) {
2122                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2123                 switch (*frm) {
2124                 case IEEE80211_ELEMID_MESHID:
2125                         meshid = frm;
2126                         break;
2127                 case IEEE80211_ELEMID_MESHCONF:
2128                         meshconf = frm;
2129                         break;
2130                 case IEEE80211_ELEMID_MESHPEER:
2131                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
2132                         memset(mp, 0, sizeof(*mp));
2133                         mp->peer_len = mpie->peer_len;
2134                         mp->peer_proto = le16dec(&mpie->peer_proto);
2135                         mp->peer_llinkid = le16dec(&mpie->peer_llinkid);
2136                         switch (subtype) {
2137                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2138                                 mp->peer_linkid =
2139                                     le16dec(&mpie->peer_linkid);
2140                                 break;
2141                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
2142                                 /* NB: peer link ID is optional */
2143                                 if (mpie->peer_len ==
2144                                     (IEEE80211_MPM_BASE_SZ + 2)) {
2145                                         mp->peer_linkid = 0;
2146                                         mp->peer_rcode =
2147                                             le16dec(&mpie->peer_linkid);
2148                                 } else {
2149                                         mp->peer_linkid =
2150                                             le16dec(&mpie->peer_linkid);
2151                                         mp->peer_rcode =
2152                                             le16dec(&mpie->peer_rcode);
2153                                 }
2154                                 break;
2155                         }
2156                         break;
2157                 }
2158                 frm += frm[1] + 2;
2159         }
2160
2161         /*
2162          * Verify the contents of the frame.
2163          * If it fails validation, close the peer link.
2164          */
2165         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2166                 sendclose = 1;
2167                 IEEE80211_DISCARD(vap,
2168                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2169                     wh, NULL, "%s", "MPM validation failed");
2170         }
2171
2172         /* If meshid is not the same reject any frames type. */
2173         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2174                 sendclose = 1;
2175                 IEEE80211_DISCARD(vap,
2176                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2177                     wh, NULL, "%s", "not for our mesh");
2178                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2179                         /*
2180                          * Standard not clear about this, if we dont ignore
2181                          * there will be an endless loop between nodes sending
2182                          * CLOSE frames between each other with wrong meshid.
2183                          * Discard and timers will bring FSM to IDLE state.
2184                          */
2185                         return NULL;
2186                 }
2187         }
2188
2189         /*
2190          * Close frames are accepted if meshid is the same.
2191          * Verify the other two types.
2192          */
2193         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2194             mesh_verify_meshconf(vap, meshconf)) {
2195                 sendclose = 1;
2196                 IEEE80211_DISCARD(vap,
2197                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2198                     wh, NULL, "%s", "configuration missmatch");
2199         }
2200
2201         if (sendclose) {
2202                 vap->iv_stats.is_rx_mgtdiscard++;
2203                 switch (ni->ni_mlstate) {
2204                 case IEEE80211_NODE_MESH_IDLE:
2205                 case IEEE80211_NODE_MESH_ESTABLISHED:
2206                 case IEEE80211_NODE_MESH_HOLDING:
2207                         /* ignore */
2208                         break;
2209                 case IEEE80211_NODE_MESH_OPENSNT:
2210                 case IEEE80211_NODE_MESH_OPENRCV:
2211                 case IEEE80211_NODE_MESH_CONFIRMRCV:
2212                         args[0] = ni->ni_mlpid;
2213                         args[1] = ni->ni_mllid;
2214                         /* Reason codes for rejection */
2215                         switch (subtype) {
2216                         case IEEE80211_ACTION_MESHPEERING_OPEN:
2217                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2218                                 break;
2219                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2220                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2221                                 break;
2222                         }
2223                         ieee80211_send_action(ni,
2224                             IEEE80211_ACTION_CAT_SELF_PROT,
2225                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2226                             args);
2227                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2228                         mesh_peer_timeout_setup(ni);
2229                         break;
2230                 }
2231                 return NULL;
2232         }
2233
2234         return (const struct ieee80211_meshpeer_ie *) mp;
2235 }
2236
2237 static int
2238 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2239         const struct ieee80211_frame *wh,
2240         const uint8_t *frm, const uint8_t *efrm)
2241 {
2242         struct ieee80211vap *vap = ni->ni_vap;
2243         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2244         struct ieee80211_meshpeer_ie ie;
2245         const struct ieee80211_meshpeer_ie *meshpeer;
2246         uint16_t args[3];
2247
2248         /* +2+2 for action + code + capabilites */
2249         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2250             IEEE80211_ACTION_MESHPEERING_OPEN);
2251         if (meshpeer == NULL) {
2252                 return 0;
2253         }
2254
2255         /* XXX move up */
2256         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2257             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2258
2259         switch (ni->ni_mlstate) {
2260         case IEEE80211_NODE_MESH_IDLE:
2261                 /* Reject open request if reached our maximum neighbor count */
2262                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2263                         args[0] = meshpeer->peer_llinkid;
2264                         args[1] = 0;
2265                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2266                         ieee80211_send_action(ni,
2267                             IEEE80211_ACTION_CAT_SELF_PROT,
2268                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2269                             args);
2270                         /* stay in IDLE state */
2271                         return (0);
2272                 }
2273                 /* Open frame accepted */
2274                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2275                 ni->ni_mllid = meshpeer->peer_llinkid;
2276                 ni->ni_mlpid = mesh_generateid(vap);
2277                 if (ni->ni_mlpid == 0)
2278                         return 0;               /* XXX */
2279                 args[0] = ni->ni_mlpid;
2280                 /* Announce we're open too... */
2281                 ieee80211_send_action(ni,
2282                     IEEE80211_ACTION_CAT_SELF_PROT,
2283                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
2284                 /* ...and confirm the link. */
2285                 args[0] = ni->ni_mlpid;
2286                 args[1] = ni->ni_mllid;
2287                 ieee80211_send_action(ni,
2288                     IEEE80211_ACTION_CAT_SELF_PROT,
2289                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2290                     args);
2291                 mesh_peer_timeout_setup(ni);
2292                 break;
2293         case IEEE80211_NODE_MESH_OPENRCV:
2294                 /* Wrong Link ID */
2295                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2296                         args[0] = ni->ni_mllid;
2297                         args[1] = ni->ni_mlpid;
2298                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2299                         ieee80211_send_action(ni,
2300                             IEEE80211_ACTION_CAT_SELF_PROT,
2301                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2302                             args);
2303                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2304                         mesh_peer_timeout_setup(ni);
2305                         break;
2306                 }
2307                 /* Duplicate open, confirm again. */
2308                 args[0] = ni->ni_mlpid;
2309                 args[1] = ni->ni_mllid;
2310                 ieee80211_send_action(ni,
2311                     IEEE80211_ACTION_CAT_SELF_PROT,
2312                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2313                     args);
2314                 break;
2315         case IEEE80211_NODE_MESH_OPENSNT:
2316                 ni->ni_mllid = meshpeer->peer_llinkid;
2317                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2318                 args[0] = ni->ni_mlpid;
2319                 args[1] = ni->ni_mllid;
2320                 ieee80211_send_action(ni,
2321                     IEEE80211_ACTION_CAT_SELF_PROT,
2322                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2323                     args);
2324                 /* NB: don't setup/clear any timeout */
2325                 break;
2326         case IEEE80211_NODE_MESH_CONFIRMRCV:
2327                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2328                     ni->ni_mllid != meshpeer->peer_llinkid) {
2329                         args[0] = ni->ni_mlpid;
2330                         args[1] = ni->ni_mllid;
2331                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2332                         ieee80211_send_action(ni,
2333                             IEEE80211_ACTION_CAT_SELF_PROT,
2334                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2335                             args);
2336                         mesh_linkchange(ni,
2337                             IEEE80211_NODE_MESH_HOLDING);
2338                         mesh_peer_timeout_setup(ni);
2339                         break;
2340                 }
2341                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2342                 ni->ni_mllid = meshpeer->peer_llinkid;
2343                 args[0] = ni->ni_mlpid;
2344                 args[1] = ni->ni_mllid;
2345                 ieee80211_send_action(ni,
2346                     IEEE80211_ACTION_CAT_SELF_PROT,
2347                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2348                     args);
2349                 mesh_peer_timeout_stop(ni);
2350                 break;
2351         case IEEE80211_NODE_MESH_ESTABLISHED:
2352                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2353                         args[0] = ni->ni_mllid;
2354                         args[1] = ni->ni_mlpid;
2355                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2356                         ieee80211_send_action(ni,
2357                             IEEE80211_ACTION_CAT_SELF_PROT,
2358                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2359                             args);
2360                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2361                         mesh_peer_timeout_setup(ni);
2362                         break;
2363                 }
2364                 args[0] = ni->ni_mlpid;
2365                 args[1] = ni->ni_mllid;
2366                 ieee80211_send_action(ni,
2367                     IEEE80211_ACTION_CAT_SELF_PROT,
2368                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2369                     args);
2370                 break;
2371         case IEEE80211_NODE_MESH_HOLDING:
2372                 args[0] = ni->ni_mlpid;
2373                 args[1] = meshpeer->peer_llinkid;
2374                 /* Standard not clear about what the reaason code should be */
2375                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2376                 ieee80211_send_action(ni,
2377                     IEEE80211_ACTION_CAT_SELF_PROT,
2378                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2379                     args);
2380                 break;
2381         }
2382         return 0;
2383 }
2384
2385 static int
2386 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2387         const struct ieee80211_frame *wh,
2388         const uint8_t *frm, const uint8_t *efrm)
2389 {
2390         struct ieee80211vap *vap = ni->ni_vap;
2391         struct ieee80211_meshpeer_ie ie;
2392         const struct ieee80211_meshpeer_ie *meshpeer;
2393         uint16_t args[3];
2394
2395         /* +2+2+2+2 for action + code + capabilites + status code + AID */
2396         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2397             IEEE80211_ACTION_MESHPEERING_CONFIRM);
2398         if (meshpeer == NULL) {
2399                 return 0;
2400         }
2401
2402         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2403             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2404             meshpeer->peer_llinkid, meshpeer->peer_linkid);
2405
2406         switch (ni->ni_mlstate) {
2407         case IEEE80211_NODE_MESH_OPENRCV:
2408                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2409                 mesh_peer_timeout_stop(ni);
2410                 break;
2411         case IEEE80211_NODE_MESH_OPENSNT:
2412                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2413                 mesh_peer_timeout_setup(ni);
2414                 break;
2415         case IEEE80211_NODE_MESH_HOLDING:
2416                 args[0] = ni->ni_mlpid;
2417                 args[1] = meshpeer->peer_llinkid;
2418                 /* Standard not clear about what the reaason code should be */
2419                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2420                 ieee80211_send_action(ni,
2421                     IEEE80211_ACTION_CAT_SELF_PROT,
2422                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2423                     args);
2424                 break;
2425         case IEEE80211_NODE_MESH_CONFIRMRCV:
2426                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2427                         args[0] = ni->ni_mlpid;
2428                         args[1] = ni->ni_mllid;
2429                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2430                         ieee80211_send_action(ni,
2431                             IEEE80211_ACTION_CAT_SELF_PROT,
2432                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2433                             args);
2434                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2435                         mesh_peer_timeout_setup(ni);
2436                 }
2437                 break;
2438         default:
2439                 IEEE80211_DISCARD(vap,
2440                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2441                     wh, NULL, "received confirm in invalid state %d",
2442                     ni->ni_mlstate);
2443                 vap->iv_stats.is_rx_mgtdiscard++;
2444                 break;
2445         }
2446         return 0;
2447 }
2448
2449 static int
2450 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2451         const struct ieee80211_frame *wh,
2452         const uint8_t *frm, const uint8_t *efrm)
2453 {
2454         struct ieee80211_meshpeer_ie ie;
2455         const struct ieee80211_meshpeer_ie *meshpeer;
2456         uint16_t args[3];
2457
2458         /* +2 for action + code */
2459         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2460             IEEE80211_ACTION_MESHPEERING_CLOSE);
2461         if (meshpeer == NULL) {
2462                 return 0;
2463         }
2464
2465         /*
2466          * XXX: check reason code, for example we could receive
2467          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2468          * to peer again.
2469          */
2470
2471         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2472             ni, "%s", "recv PEER CLOSE");
2473
2474         switch (ni->ni_mlstate) {
2475         case IEEE80211_NODE_MESH_IDLE:
2476                 /* ignore */
2477                 break;
2478         case IEEE80211_NODE_MESH_OPENRCV:
2479         case IEEE80211_NODE_MESH_OPENSNT:
2480         case IEEE80211_NODE_MESH_CONFIRMRCV:
2481         case IEEE80211_NODE_MESH_ESTABLISHED:
2482                 args[0] = ni->ni_mlpid;
2483                 args[1] = ni->ni_mllid;
2484                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2485                 ieee80211_send_action(ni,
2486                     IEEE80211_ACTION_CAT_SELF_PROT,
2487                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2488                     args);
2489                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2490                 mesh_peer_timeout_setup(ni);
2491                 break;
2492         case IEEE80211_NODE_MESH_HOLDING:
2493                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2494                 mesh_peer_timeout_stop(ni);
2495                 break;
2496         }
2497         return 0;
2498 }
2499
2500 /*
2501  * Link Metric handling.
2502  */
2503 static int
2504 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2505         const struct ieee80211_frame *wh,
2506         const uint8_t *frm, const uint8_t *efrm)
2507 {
2508         const struct ieee80211_meshlmetric_ie *ie =
2509             (const struct ieee80211_meshlmetric_ie *)
2510             (frm+2); /* action + code */
2511         struct ieee80211_meshlmetric_ie lm_rep;
2512
2513         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2514                 lm_rep.lm_flags = 0;
2515                 lm_rep.lm_metric = mesh_airtime_calc(ni);
2516                 ieee80211_send_action(ni,
2517                     IEEE80211_ACTION_CAT_MESH,
2518                     IEEE80211_ACTION_MESH_LMETRIC,
2519                     &lm_rep);
2520         }
2521         /* XXX: else do nothing for now */
2522         return 0;
2523 }
2524
2525 /*
2526  * Parse meshgate action ie's for GANN frames.
2527  * Returns -1 if parsing fails, otherwise 0.
2528  */
2529 static int
2530 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2531     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
2532     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2533 {
2534         struct ieee80211vap *vap = ni->ni_vap;
2535         const struct ieee80211_meshgann_ie *gannie;
2536
2537         while (efrm - frm > 1) {
2538                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2539                 switch (*frm) {
2540                 case IEEE80211_ELEMID_MESHGANN:
2541                         gannie = (const struct ieee80211_meshgann_ie *) frm;
2542                         memset(ie, 0, sizeof(*ie));
2543                         ie->gann_ie = gannie->gann_ie;
2544                         ie->gann_len = gannie->gann_len;
2545                         ie->gann_flags = gannie->gann_flags;
2546                         ie->gann_hopcount = gannie->gann_hopcount;
2547                         ie->gann_ttl = gannie->gann_ttl;
2548                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2549                         ie->gann_seq = le32dec(&gannie->gann_seq);
2550                         ie->gann_interval = le16dec(&gannie->gann_interval);
2551                         break;
2552                 }
2553                 frm += frm[1] + 2;
2554         }
2555
2556         return 0;
2557 }
2558
2559 /*
2560  * Mesh Gate Announcement handling.
2561  */
2562 static int
2563 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2564         const struct ieee80211_frame *wh,
2565         const uint8_t *frm, const uint8_t *efrm)
2566 {
2567         struct ieee80211vap *vap = ni->ni_vap;
2568         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2569         struct ieee80211_mesh_gate_route *gr, *next;
2570         struct ieee80211_mesh_route *rt_gate;
2571         struct ieee80211_meshgann_ie pgann;
2572         struct ieee80211_meshgann_ie ie;
2573         int found = 0;
2574
2575         /* +2 for action + code */
2576         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2577                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2578                     ni->ni_macaddr, NULL, "%s",
2579                     "GANN parsing failed");
2580                 vap->iv_stats.is_rx_mgtdiscard++;
2581                 return (0);
2582         }
2583
2584         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2585                 return 0;
2586
2587         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2588             "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2589             ie.gann_seq);
2590
2591         if (ms == NULL)
2592                 return (0);
2593         MESH_RT_LOCK(ms);
2594         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2595                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2596                         continue;
2597                 if (ie.gann_seq <= gr->gr_lastseq) {
2598                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2599                             ni->ni_macaddr, NULL,
2600                             "GANN old seqno %u <= %u",
2601                             ie.gann_seq, gr->gr_lastseq);
2602                         MESH_RT_UNLOCK(ms);
2603                         return (0);
2604                 }
2605                 /* corresponding mesh gate found & GANN accepted */
2606                 found = 1;
2607                 break;
2608
2609         }
2610         if (found == 0) {
2611                 /* this GANN is from a new mesh Gate add it to known table. */
2612                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2613                     "stored new GANN information, seq %u.", ie.gann_seq);
2614                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2615                     M_80211_MESH_GT_RT,
2616                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2617                 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2618                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2619         }
2620         gr->gr_lastseq = ie.gann_seq;
2621
2622         /* check if we have a path to this gate */
2623         rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2624         if (rt_gate != NULL &&
2625             rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2626                 gr->gr_route = rt_gate;
2627                 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2628         }
2629
2630         MESH_RT_UNLOCK(ms);
2631
2632         /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2633         if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2634                 return 0;
2635         pgann.gann_flags = ie.gann_flags; /* Reserved */
2636         pgann.gann_hopcount = ie.gann_hopcount + 1;
2637         pgann.gann_ttl = ie.gann_ttl - 1;
2638         IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2639         pgann.gann_seq = ie.gann_seq;
2640         pgann.gann_interval = ie.gann_interval;
2641
2642         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2643             "%s", "propagate GANN");
2644
2645         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2646             IEEE80211_ACTION_MESH_GANN, &pgann);
2647
2648         return 0;
2649 }
2650
2651 static int
2652 mesh_send_action(struct ieee80211_node *ni,
2653     const uint8_t sa[IEEE80211_ADDR_LEN],
2654     const uint8_t da[IEEE80211_ADDR_LEN],
2655     struct mbuf *m)
2656 {
2657         struct ieee80211vap *vap = ni->ni_vap;
2658         struct ieee80211com *ic = ni->ni_ic;
2659         struct ieee80211_bpf_params params;
2660         int ret;
2661
2662         KASSERT(ni != NULL, ("null node"));
2663
2664         if (vap->iv_state == IEEE80211_S_CAC) {
2665                 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2666                     "block %s frame in CAC state", "Mesh action");
2667                 vap->iv_stats.is_tx_badstate++;
2668                 ieee80211_free_node(ni);
2669                 m_freem(m);
2670                 return EIO;             /* XXX */
2671         }
2672
2673         M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2674         if (m == NULL) {
2675                 ieee80211_free_node(ni);
2676                 return ENOMEM;
2677         }
2678
2679         IEEE80211_TX_LOCK(ic);
2680         ieee80211_send_setup(ni, m,
2681              IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2682              IEEE80211_NONQOS_TID, sa, da, sa);
2683         m->m_flags |= M_ENCAP;          /* mark encapsulated */
2684
2685         memset(&params, 0, sizeof(params));
2686         params.ibp_pri = WME_AC_VO;
2687         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2688         if (IEEE80211_IS_MULTICAST(da))
2689                 params.ibp_try0 = 1;
2690         else
2691                 params.ibp_try0 = ni->ni_txparms->maxretry;
2692         params.ibp_power = ni->ni_txpower;
2693
2694         IEEE80211_NODE_STAT(ni, tx_mgmt);
2695
2696         ret = ieee80211_raw_output(vap, ni, m, &params);
2697         IEEE80211_TX_UNLOCK(ic);
2698         return (ret);
2699 }
2700
2701 #define ADDSHORT(frm, v) do {                   \
2702         frm[0] = (v) & 0xff;                    \
2703         frm[1] = (v) >> 8;                      \
2704         frm += 2;                               \
2705 } while (0)
2706 #define ADDWORD(frm, v) do {                    \
2707         frm[0] = (v) & 0xff;                    \
2708         frm[1] = ((v) >> 8) & 0xff;             \
2709         frm[2] = ((v) >> 16) & 0xff;            \
2710         frm[3] = ((v) >> 24) & 0xff;            \
2711         frm += 4;                               \
2712 } while (0)
2713
2714 static int
2715 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2716         int category, int action, void *args0)
2717 {
2718         struct ieee80211vap *vap = ni->ni_vap;
2719         struct ieee80211com *ic = ni->ni_ic;
2720         uint16_t *args = args0;
2721         const struct ieee80211_rateset *rs;
2722         struct mbuf *m;
2723         uint8_t *frm;
2724
2725         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2726             "send PEER OPEN action: localid 0x%x", args[0]);
2727
2728         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2729             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2730             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2731         ieee80211_ref_node(ni);
2732
2733         m = ieee80211_getmgtframe(&frm,
2734             ic->ic_headroom + sizeof(struct ieee80211_frame),
2735             sizeof(uint16_t)    /* action+category */
2736             + sizeof(uint16_t)  /* capabilites */
2737             + 2 + IEEE80211_RATE_SIZE
2738             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2739             + 2 + IEEE80211_MESHID_LEN
2740             + sizeof(struct ieee80211_meshconf_ie)
2741             + sizeof(struct ieee80211_meshpeer_ie)
2742         );
2743         if (m != NULL) {
2744                 /*
2745                  * mesh peer open action frame format:
2746                  *   [1] category
2747                  *   [1] action
2748                  *   [2] capabilities
2749                  *   [tlv] rates
2750                  *   [tlv] xrates
2751                  *   [tlv] mesh id
2752                  *   [tlv] mesh conf
2753                  *   [tlv] mesh peer link mgmt
2754                  */
2755                 *frm++ = category;
2756                 *frm++ = action;
2757                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2758                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2759                 frm = ieee80211_add_rates(frm, rs);
2760                 frm = ieee80211_add_xrates(frm, rs);
2761                 frm = ieee80211_add_meshid(frm, vap);
2762                 frm = ieee80211_add_meshconf(frm, vap);
2763                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2764                     args[0], 0, 0);
2765                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2766                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2767         } else {
2768                 vap->iv_stats.is_tx_nobuf++;
2769                 ieee80211_free_node(ni);
2770                 return ENOMEM;
2771         }
2772 }
2773
2774 static int
2775 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2776         int category, int action, void *args0)
2777 {
2778         struct ieee80211vap *vap = ni->ni_vap;
2779         struct ieee80211com *ic = ni->ni_ic;
2780         uint16_t *args = args0;
2781         const struct ieee80211_rateset *rs;
2782         struct mbuf *m;
2783         uint8_t *frm;
2784
2785         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2786             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2787             args[0], args[1]);
2788
2789         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2790             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2791             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2792         ieee80211_ref_node(ni);
2793
2794         m = ieee80211_getmgtframe(&frm,
2795             ic->ic_headroom + sizeof(struct ieee80211_frame),
2796             sizeof(uint16_t)    /* action+category */
2797             + sizeof(uint16_t)  /* capabilites */
2798             + sizeof(uint16_t)  /* status code */
2799             + sizeof(uint16_t)  /* AID */
2800             + 2 + IEEE80211_RATE_SIZE
2801             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2802             + 2 + IEEE80211_MESHID_LEN
2803             + sizeof(struct ieee80211_meshconf_ie)
2804             + sizeof(struct ieee80211_meshpeer_ie)
2805         );
2806         if (m != NULL) {
2807                 /*
2808                  * mesh peer confirm action frame format:
2809                  *   [1] category
2810                  *   [1] action
2811                  *   [2] capabilities
2812                  *   [2] status code
2813                  *   [2] association id (peer ID)
2814                  *   [tlv] rates
2815                  *   [tlv] xrates
2816                  *   [tlv] mesh id
2817                  *   [tlv] mesh conf
2818                  *   [tlv] mesh peer link mgmt
2819                  */
2820                 *frm++ = category;
2821                 *frm++ = action;
2822                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2823                 ADDSHORT(frm, 0);               /* status code */
2824                 ADDSHORT(frm, args[1]);         /* AID */
2825                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2826                 frm = ieee80211_add_rates(frm, rs);
2827                 frm = ieee80211_add_xrates(frm, rs);
2828                 frm = ieee80211_add_meshid(frm, vap);
2829                 frm = ieee80211_add_meshconf(frm, vap);
2830                 frm = ieee80211_add_meshpeer(frm,
2831                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2832                     args[0], args[1], 0);
2833                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2834                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2835         } else {
2836                 vap->iv_stats.is_tx_nobuf++;
2837                 ieee80211_free_node(ni);
2838                 return ENOMEM;
2839         }
2840 }
2841
2842 static int
2843 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2844         int category, int action, void *args0)
2845 {
2846         struct ieee80211vap *vap = ni->ni_vap;
2847         struct ieee80211com *ic = ni->ni_ic;
2848         uint16_t *args = args0;
2849         struct mbuf *m;
2850         uint8_t *frm;
2851
2852         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2853             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)",
2854             args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
2855
2856         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2857             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2858             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2859         ieee80211_ref_node(ni);
2860
2861         m = ieee80211_getmgtframe(&frm,
2862             ic->ic_headroom + sizeof(struct ieee80211_frame),
2863             sizeof(uint16_t)    /* action+category */
2864             + sizeof(uint16_t)  /* reason code */
2865             + 2 + IEEE80211_MESHID_LEN
2866             + sizeof(struct ieee80211_meshpeer_ie)
2867         );
2868         if (m != NULL) {
2869                 /*
2870                  * mesh peer close action frame format:
2871                  *   [1] category
2872                  *   [1] action
2873                  *   [tlv] mesh id
2874                  *   [tlv] mesh peer link mgmt
2875                  */
2876                 *frm++ = category;
2877                 *frm++ = action;
2878                 frm = ieee80211_add_meshid(frm, vap);
2879                 frm = ieee80211_add_meshpeer(frm,
2880                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2881                     args[0], args[1], args[2]);
2882                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2883                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2884         } else {
2885                 vap->iv_stats.is_tx_nobuf++;
2886                 ieee80211_free_node(ni);
2887                 return ENOMEM;
2888         }
2889 }
2890
2891 static int
2892 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2893         int category, int action, void *arg0)
2894 {
2895         struct ieee80211vap *vap = ni->ni_vap;
2896         struct ieee80211com *ic = ni->ni_ic;
2897         struct ieee80211_meshlmetric_ie *ie = arg0;
2898         struct mbuf *m;
2899         uint8_t *frm;
2900
2901         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2902                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2903                     ni, "%s", "send LINK METRIC REQUEST action");
2904         } else {
2905                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2906                     ni, "send LINK METRIC REPLY action: metric 0x%x",
2907                     ie->lm_metric);
2908         }
2909         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2910             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2911             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2912         ieee80211_ref_node(ni);
2913
2914         m = ieee80211_getmgtframe(&frm,
2915             ic->ic_headroom + sizeof(struct ieee80211_frame),
2916             sizeof(uint16_t) +  /* action+category */
2917             sizeof(struct ieee80211_meshlmetric_ie)
2918         );
2919         if (m != NULL) {
2920                 /*
2921                  * mesh link metric
2922                  *   [1] category
2923                  *   [1] action
2924                  *   [tlv] mesh link metric
2925                  */
2926                 *frm++ = category;
2927                 *frm++ = action;
2928                 frm = ieee80211_add_meshlmetric(frm,
2929                     ie->lm_flags, ie->lm_metric);
2930                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2931                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2932         } else {
2933                 vap->iv_stats.is_tx_nobuf++;
2934                 ieee80211_free_node(ni);
2935                 return ENOMEM;
2936         }
2937 }
2938
2939 static int
2940 mesh_send_action_meshgate(struct ieee80211_node *ni,
2941         int category, int action, void *arg0)
2942 {
2943         struct ieee80211vap *vap = ni->ni_vap;
2944         struct ieee80211com *ic = ni->ni_ic;
2945         struct ieee80211_meshgann_ie *ie = arg0;
2946         struct mbuf *m;
2947         uint8_t *frm;
2948
2949         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2950             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2951             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2952         ieee80211_ref_node(ni);
2953
2954         m = ieee80211_getmgtframe(&frm,
2955             ic->ic_headroom + sizeof(struct ieee80211_frame),
2956             sizeof(uint16_t) +  /* action+category */
2957             IEEE80211_MESHGANN_BASE_SZ
2958         );
2959         if (m != NULL) {
2960                 /*
2961                  * mesh link metric
2962                  *   [1] category
2963                  *   [1] action
2964                  *   [tlv] mesh gate annoucement
2965                  */
2966                 *frm++ = category;
2967                 *frm++ = action;
2968                 frm = ieee80211_add_meshgate(frm, ie);
2969                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2970                 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2971         } else {
2972                 vap->iv_stats.is_tx_nobuf++;
2973                 ieee80211_free_node(ni);
2974                 return ENOMEM;
2975         }
2976 }
2977
2978 static void
2979 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2980 {
2981         switch (ni->ni_mlstate) {
2982         case IEEE80211_NODE_MESH_HOLDING:
2983                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2984                 break;
2985         case IEEE80211_NODE_MESH_CONFIRMRCV:
2986                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2987                 break;
2988         case IEEE80211_NODE_MESH_IDLE:
2989                 ni->ni_mltval = 0;
2990                 break;
2991         default:
2992                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
2993                 break;
2994         }
2995         if (ni->ni_mltval)
2996                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2997                     mesh_peer_timeout_cb, ni);
2998 }
2999
3000 /*
3001  * Same as above but backoffs timer statisically 50%.
3002  */
3003 static void
3004 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3005 {
3006         uint32_t r;
3007
3008         r = arc4random();
3009         ni->ni_mltval += r % ni->ni_mltval;
3010         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3011             ni);
3012 }
3013
3014 static __inline void
3015 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3016 {
3017         callout_drain(&ni->ni_mltimer);
3018 }
3019
3020 static void
3021 mesh_peer_backoff_cb(void *arg)
3022 {
3023         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3024
3025         /* After backoff timeout, try to peer automatically again. */
3026         ni->ni_mlhcnt = 0;
3027 }
3028
3029 /*
3030  * Mesh Peer Link Management FSM timeout handling.
3031  */
3032 static void
3033 mesh_peer_timeout_cb(void *arg)
3034 {
3035         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3036         uint16_t args[3];
3037
3038         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3039             ni, "mesh link timeout, state %d, retry counter %d",
3040             ni->ni_mlstate, ni->ni_mlrcnt);
3041
3042         switch (ni->ni_mlstate) {
3043         case IEEE80211_NODE_MESH_IDLE:
3044         case IEEE80211_NODE_MESH_ESTABLISHED:
3045                 break;
3046         case IEEE80211_NODE_MESH_OPENSNT:
3047         case IEEE80211_NODE_MESH_OPENRCV:
3048                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3049                         args[0] = ni->ni_mlpid;
3050                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3051                         ieee80211_send_action(ni,
3052                             IEEE80211_ACTION_CAT_SELF_PROT,
3053                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3054                         ni->ni_mlrcnt = 0;
3055                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3056                         mesh_peer_timeout_setup(ni);
3057                 } else {
3058                         args[0] = ni->ni_mlpid;
3059                         ieee80211_send_action(ni,
3060                             IEEE80211_ACTION_CAT_SELF_PROT,
3061                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
3062                         ni->ni_mlrcnt++;
3063                         mesh_peer_timeout_backoff(ni);
3064                 }
3065                 break;
3066         case IEEE80211_NODE_MESH_CONFIRMRCV:
3067                 args[0] = ni->ni_mlpid;
3068                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3069                 ieee80211_send_action(ni,
3070                     IEEE80211_ACTION_CAT_SELF_PROT,
3071                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3072                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3073                 mesh_peer_timeout_setup(ni);
3074                 break;
3075         case IEEE80211_NODE_MESH_HOLDING:
3076                 ni->ni_mlhcnt++;
3077                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3078                         callout_reset(&ni->ni_mlhtimer,
3079                             ieee80211_mesh_backofftimeout,
3080                             mesh_peer_backoff_cb, ni);
3081                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3082                 break;
3083         }
3084 }
3085
3086 static int
3087 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3088 {
3089         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3090
3091         if (ie == NULL || ie[1] != ms->ms_idlen)
3092                 return 1;
3093         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3094 }
3095
3096 /*
3097  * Check if we are using the same algorithms for this mesh.
3098  */
3099 static int
3100 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3101 {
3102         const struct ieee80211_meshconf_ie *meshconf =
3103             (const struct ieee80211_meshconf_ie *) ie;
3104         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3105
3106         if (meshconf == NULL)
3107                 return 1;
3108         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3109                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3110                     "unknown path selection algorithm: 0x%x\n",
3111                     meshconf->conf_pselid);
3112                 return 1;
3113         }
3114         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3115                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3116                     "unknown path metric algorithm: 0x%x\n",
3117                     meshconf->conf_pmetid);
3118                 return 1;
3119         }
3120         if (meshconf->conf_ccid != 0) {
3121                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3122                     "unknown congestion control algorithm: 0x%x\n",
3123                     meshconf->conf_ccid);
3124                 return 1;
3125         }
3126         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3127                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3128                     "unknown sync algorithm: 0x%x\n",
3129                     meshconf->conf_syncid);
3130                 return 1;
3131         }
3132         if (meshconf->conf_authid != 0) {
3133                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3134                     "unknown auth auth algorithm: 0x%x\n",
3135                     meshconf->conf_pselid);
3136                 return 1;
3137         }
3138         /* Not accepting peers */
3139         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3140                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3141                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
3142                 return 1;
3143         }
3144         return 0;
3145 }
3146
3147 static int
3148 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3149     const uint8_t *ie)
3150 {
3151         const struct ieee80211_meshpeer_ie *meshpeer =
3152             (const struct ieee80211_meshpeer_ie *) ie;
3153
3154         if (meshpeer == NULL ||
3155             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3156             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3157                 return 1;
3158         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3159                 IEEE80211_DPRINTF(vap,
3160                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3161                     "Only MPM protocol is supported (proto: 0x%02X)",
3162                     meshpeer->peer_proto);
3163                 return 1;
3164         }
3165         switch (subtype) {
3166         case IEEE80211_ACTION_MESHPEERING_OPEN:
3167                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3168                         return 1;
3169                 break;
3170         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3171                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3172                         return 1;
3173                 break;
3174         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3175                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3176                         return 1;
3177                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3178                     meshpeer->peer_linkid != 0)
3179                         return 1;
3180                 if (meshpeer->peer_rcode == 0)
3181                         return 1;
3182                 break;
3183         }
3184         return 0;
3185 }
3186
3187 /*
3188  * Add a Mesh ID IE to a frame.
3189  */
3190 uint8_t *
3191 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3192 {
3193         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3194
3195         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3196
3197         *frm++ = IEEE80211_ELEMID_MESHID;
3198         *frm++ = ms->ms_idlen;
3199         memcpy(frm, ms->ms_id, ms->ms_idlen);
3200         return frm + ms->ms_idlen;
3201 }
3202
3203 /*
3204  * Add a Mesh Configuration IE to a frame.
3205  * For now just use HWMP routing, Airtime link metric, Null Congestion
3206  * Signaling, Null Sync Protocol and Null Authentication.
3207  */
3208 uint8_t *
3209 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3210 {
3211         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3212         uint16_t caps;
3213
3214         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3215
3216         *frm++ = IEEE80211_ELEMID_MESHCONF;
3217         *frm++ = IEEE80211_MESH_CONF_SZ;
3218         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
3219         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
3220         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3221         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3222         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3223         /* NB: set the number of neighbors before the rest */
3224         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3225             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3226         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3227                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3228         frm += 1;
3229         caps = 0;
3230         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3231                 caps |= IEEE80211_MESHCONF_CAP_AP;
3232         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3233                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3234         *frm++ = caps;
3235         return frm;
3236 }
3237
3238 /*
3239  * Add a Mesh Peer Management IE to a frame.
3240  */
3241 uint8_t *
3242 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3243     uint16_t peerid, uint16_t reason)
3244 {
3245
3246         KASSERT(localid != 0, ("localid == 0"));
3247
3248         *frm++ = IEEE80211_ELEMID_MESHPEER;
3249         switch (subtype) {
3250         case IEEE80211_ACTION_MESHPEERING_OPEN:
3251                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
3252                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3253                 ADDSHORT(frm, localid);                 /* local ID */
3254                 break;
3255         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3256                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3257                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
3258                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3259                 ADDSHORT(frm, localid);                 /* local ID */
3260                 ADDSHORT(frm, peerid);                  /* peer ID */
3261                 break;
3262         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3263                 if (peerid)
3264                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
3265                 else
3266                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3267                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3268                 ADDSHORT(frm, localid); /* local ID */
3269                 if (peerid)
3270                         ADDSHORT(frm, peerid);  /* peer ID */
3271                 ADDSHORT(frm, reason);
3272                 break;
3273         }
3274         return frm;
3275 }
3276
3277 /*
3278  * Compute an Airtime Link Metric for the link with this node.
3279  *
3280  * Based on Draft 3.0 spec (11B.10, p.149).
3281  */
3282 /*
3283  * Max 802.11s overhead.
3284  */
3285 #define IEEE80211_MESH_MAXOVERHEAD \
3286         (sizeof(struct ieee80211_qosframe_addr4) \
3287          + sizeof(struct ieee80211_meshcntl_ae10) \
3288         + sizeof(struct llc) \
3289         + IEEE80211_ADDR_LEN \
3290         + IEEE80211_WEP_IVLEN \
3291         + IEEE80211_WEP_KIDLEN \
3292         + IEEE80211_WEP_CRCLEN \
3293         + IEEE80211_WEP_MICLEN \
3294         + IEEE80211_CRC_LEN)
3295 uint32_t
3296 mesh_airtime_calc(struct ieee80211_node *ni)
3297 {
3298 #define M_BITS 8
3299 #define S_FACTOR (2 * M_BITS)
3300         struct ieee80211com *ic = ni->ni_ic;
3301         struct ifnet *ifp = ni->ni_vap->iv_ifp;
3302         const static int nbits = 8192 << M_BITS;
3303         uint32_t overhead, rate, errrate;
3304         uint64_t res;
3305
3306         /* Time to transmit a frame */
3307         rate = ni->ni_txrate;
3308         overhead = ieee80211_compute_duration(ic->ic_rt,
3309             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3310         /* Error rate in percentage */
3311         /* XXX assuming small failures are ok */
3312         errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
3313             ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
3314             / 100;
3315         res = (overhead + (nbits / rate)) *
3316             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3317
3318         return (uint32_t)(res >> S_FACTOR);
3319 #undef M_BITS
3320 #undef S_FACTOR
3321 }
3322
3323 /*
3324  * Add a Mesh Link Metric report IE to a frame.
3325  */
3326 uint8_t *
3327 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3328 {
3329         *frm++ = IEEE80211_ELEMID_MESHLINK;
3330         *frm++ = 5;
3331         *frm++ = flags;
3332         ADDWORD(frm, metric);
3333         return frm;
3334 }
3335
3336 /*
3337  * Add a Mesh Gate Announcement IE to a frame.
3338  */
3339 uint8_t *
3340 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3341 {
3342         *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3343         *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3344         *frm++ = ie->gann_flags;
3345         *frm++ = ie->gann_hopcount;
3346         *frm++ = ie->gann_ttl;
3347         IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3348         frm += 6;
3349         ADDWORD(frm, ie->gann_seq);
3350         ADDSHORT(frm, ie->gann_interval);
3351         return frm;
3352 }
3353 #undef ADDSHORT
3354 #undef ADDWORD
3355
3356 /*
3357  * Initialize any mesh-specific node state.
3358  */
3359 void
3360 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3361 {
3362         ni->ni_flags |= IEEE80211_NODE_QOS;
3363         callout_init(&ni->ni_mltimer, 1);
3364         callout_init(&ni->ni_mlhtimer, 1);
3365 }
3366
3367 /*
3368  * Cleanup any mesh-specific node state.
3369  */
3370 void
3371 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3372 {
3373         struct ieee80211vap *vap = ni->ni_vap;
3374         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3375
3376         callout_drain(&ni->ni_mltimer);
3377         callout_drain(&ni->ni_mlhtimer);
3378         /* NB: short-circuit callbacks after mesh_vdetach */
3379         if (vap->iv_mesh != NULL)
3380                 ms->ms_ppath->mpp_peerdown(ni);
3381 }
3382
3383 void
3384 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3385 {
3386         ni->ni_meshidlen = ie[1];
3387         memcpy(ni->ni_meshid, ie + 2, ie[1]);
3388 }
3389
3390 /*
3391  * Setup mesh-specific node state on neighbor discovery.
3392  */
3393 void
3394 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3395         const struct ieee80211_frame *wh,
3396         const struct ieee80211_scanparams *sp)
3397 {
3398         ieee80211_parse_meshid(ni, sp->meshid);
3399 }
3400
3401 void
3402 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3403         struct ieee80211_beacon_offsets *bo)
3404 {
3405         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3406
3407         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3408                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3409                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3410         }
3411 }
3412
3413 static int
3414 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3415 {
3416         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3417         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3418         struct ieee80211_mesh_route *rt;
3419         struct ieee80211req_mesh_route *imr;
3420         size_t len, off;
3421         uint8_t *p;
3422         int error;
3423
3424         if (vap->iv_opmode != IEEE80211_M_MBSS)
3425                 return ENOSYS;
3426
3427         error = 0;
3428         switch (ireq->i_type) {
3429         case IEEE80211_IOC_MESH_ID:
3430                 ireq->i_len = ms->ms_idlen;
3431                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3432                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3433                 break;
3434         case IEEE80211_IOC_MESH_AP:
3435                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3436                 break;
3437         case IEEE80211_IOC_MESH_FWRD:
3438                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3439                 break;
3440         case IEEE80211_IOC_MESH_GATE:
3441                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3442                 break;
3443         case IEEE80211_IOC_MESH_TTL:
3444                 ireq->i_val = ms->ms_ttl;
3445                 break;
3446         case IEEE80211_IOC_MESH_RTCMD:
3447                 switch (ireq->i_val) {
3448                 case IEEE80211_MESH_RTCMD_LIST:
3449                         len = 0;
3450                         MESH_RT_LOCK(ms);
3451                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3452                                 len += sizeof(*imr);
3453                         }
3454                         MESH_RT_UNLOCK(ms);
3455                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3456                                 ireq->i_len = len;
3457                                 return ENOMEM;
3458                         }
3459                         ireq->i_len = len;
3460                         /* XXX M_WAIT? */
3461                         p = IEEE80211_MALLOC(len, M_TEMP,
3462                             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
3463                         if (p == NULL)
3464                                 return ENOMEM;
3465                         off = 0;
3466                         MESH_RT_LOCK(ms);
3467                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3468                                 if (off >= len)
3469                                         break;
3470                                 imr = (struct ieee80211req_mesh_route *)
3471                                     (p + off);
3472                                 IEEE80211_ADDR_COPY(imr->imr_dest,
3473                                     rt->rt_dest);
3474                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3475                                     rt->rt_nexthop);
3476                                 imr->imr_metric = rt->rt_metric;
3477                                 imr->imr_nhops = rt->rt_nhops;
3478                                 imr->imr_lifetime =
3479                                     ieee80211_mesh_rt_update(rt, 0);
3480                                 imr->imr_lastmseq = rt->rt_lastmseq;
3481                                 imr->imr_flags = rt->rt_flags; /* last */
3482                                 off += sizeof(*imr);
3483                         }
3484                         MESH_RT_UNLOCK(ms);
3485                         error = copyout(p, (uint8_t *)ireq->i_data,
3486                             ireq->i_len);
3487                         IEEE80211_FREE(p, M_TEMP);
3488                         break;
3489                 case IEEE80211_MESH_RTCMD_FLUSH:
3490                 case IEEE80211_MESH_RTCMD_ADD:
3491                 case IEEE80211_MESH_RTCMD_DELETE:
3492                         return EINVAL;
3493                 default:
3494                         return ENOSYS;
3495                 }
3496                 break;
3497         case IEEE80211_IOC_MESH_PR_METRIC:
3498                 len = strlen(ms->ms_pmetric->mpm_descr);
3499                 if (ireq->i_len < len)
3500                         return EINVAL;
3501                 ireq->i_len = len;
3502                 error = copyout(ms->ms_pmetric->mpm_descr,
3503                     (uint8_t *)ireq->i_data, len);
3504                 break;
3505         case IEEE80211_IOC_MESH_PR_PATH:
3506                 len = strlen(ms->ms_ppath->mpp_descr);
3507                 if (ireq->i_len < len)
3508                         return EINVAL;
3509                 ireq->i_len = len;
3510                 error = copyout(ms->ms_ppath->mpp_descr,
3511                     (uint8_t *)ireq->i_data, len);
3512                 break;
3513         default:
3514                 return ENOSYS;
3515         }
3516
3517         return error;
3518 }
3519 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3520
3521 static int
3522 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3523 {
3524         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3525         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3526         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3527         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3528         int error;
3529
3530         if (vap->iv_opmode != IEEE80211_M_MBSS)
3531                 return ENOSYS;
3532
3533         error = 0;
3534         switch (ireq->i_type) {
3535         case IEEE80211_IOC_MESH_ID:
3536                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3537                         return EINVAL;
3538                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3539                 if (error != 0)
3540                         break;
3541                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3542                 ms->ms_idlen = ireq->i_len;
3543                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3544                 error = ENETRESET;
3545                 break;
3546         case IEEE80211_IOC_MESH_AP:
3547                 if (ireq->i_val)
3548                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3549                 else
3550                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3551                 error = ENETRESET;
3552                 break;
3553         case IEEE80211_IOC_MESH_FWRD:
3554                 if (ireq->i_val)
3555                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3556                 else
3557                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3558                 mesh_gatemode_setup(vap);
3559                 break;
3560         case IEEE80211_IOC_MESH_GATE:
3561                 if (ireq->i_val)
3562                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3563                 else
3564                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3565                 break;
3566         case IEEE80211_IOC_MESH_TTL:
3567                 ms->ms_ttl = (uint8_t) ireq->i_val;
3568                 break;
3569         case IEEE80211_IOC_MESH_RTCMD:
3570                 switch (ireq->i_val) {
3571                 case IEEE80211_MESH_RTCMD_LIST:
3572                         return EINVAL;
3573                 case IEEE80211_MESH_RTCMD_FLUSH:
3574                         ieee80211_mesh_rt_flush(vap);
3575                         break;
3576                 case IEEE80211_MESH_RTCMD_ADD:
3577                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
3578                             IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
3579                                 return EINVAL;
3580                         error = copyin(ireq->i_data, &tmpaddr,
3581                             IEEE80211_ADDR_LEN);
3582                         if (error == 0)
3583                                 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3584                         break;
3585                 case IEEE80211_MESH_RTCMD_DELETE:
3586                         ieee80211_mesh_rt_del(vap, ireq->i_data);
3587                         break;
3588                 default:
3589                         return ENOSYS;
3590                 }
3591                 break;
3592         case IEEE80211_IOC_MESH_PR_METRIC:
3593                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3594                 if (error == 0) {
3595                         error = mesh_select_proto_metric(vap, tmpproto);
3596                         if (error == 0)
3597                                 error = ENETRESET;
3598                 }
3599                 break;
3600         case IEEE80211_IOC_MESH_PR_PATH:
3601                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3602                 if (error == 0) {
3603                         error = mesh_select_proto_path(vap, tmpproto);
3604                         if (error == 0)
3605                                 error = ENETRESET;
3606                 }
3607                 break;
3608         default:
3609                 return ENOSYS;
3610         }
3611         return error;
3612 }
3613 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);