sys/net80211/ieee80211_mesh.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause
   3  *
   4  * Copyright (c) 2009 The FreeBSD Foundation
   5  *
   6  * This software was developed by Rui Paulo under sponsorship from the
   7  * FreeBSD Foundation.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 /*
  32  * IEEE 802.11s Mesh Point (MBSS) support.
  33  *
  34  * Based on March 2009, D3.0 802.11s draft spec.
  35  */
  36 #include "opt_inet.h"
  37 #include "opt_wlan.h"
  38
  39 #include <sys/param.h>
  40 #include <sys/systm.h>
  41 #include <sys/mbuf.h>
  42 #include <sys/malloc.h>
  43 #include <sys/kernel.h>
  44
  45 #include <sys/socket.h>
  46 #include <sys/sockio.h>
  47 #include <sys/endian.h>
  48 #include <sys/errno.h>
  49 #include <sys/proc.h>
  50 #include <sys/sysctl.h>
  51
  52 #include <net/bpf.h>
  53 #include <net/if.h>
  54 #include <net/if_var.h>
  55 #include <net/if_media.h>
  56 #include <net/if_llc.h>
  57 #include <net/if_private.h>
  58 #include <net/ethernet.h>
  59
  60 #include <net80211/ieee80211_var.h>
  61 #include <net80211/ieee80211_action.h>
  62 #ifdef IEEE80211_SUPPORT_SUPERG
  63 #include <net80211/ieee80211_superg.h>
  64 #endif
  65 #include <net80211/ieee80211_input.h>
  66 #include <net80211/ieee80211_mesh.h>
  67
  68 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
  69 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
  70 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
  71 static void     mesh_vattach(struct ieee80211vap *);
  72 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  73 static void     mesh_rt_cleanup_cb(void *);
  74 static void     mesh_gatemode_setup(struct ieee80211vap *);
  75 static void     mesh_gatemode_cb(void *);
  76 static void     mesh_linkchange(struct ieee80211_node *,
  77                     enum ieee80211_mesh_mlstate);
  78 static void     mesh_checkid(void *, struct ieee80211_node *);
  79 static uint32_t mesh_generateid(struct ieee80211vap *);
  80 static int      mesh_checkpseq(struct ieee80211vap *,
  81                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
  82 static void     mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
  83                     struct ieee80211_mesh_route *);
  84 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
  85                     const struct ieee80211_meshcntl *);
  86 static int      mesh_input(struct ieee80211_node *, struct mbuf *,
  87                     const struct ieee80211_rx_stats *rxs, int, int);
  88 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
  89                     const struct ieee80211_rx_stats *rxs, int, int);
  90 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  91 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
  92 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
  93 static void     mesh_peer_timeout_cb(void *);
  94 static __inline void
  95                 mesh_peer_timeout_stop(struct ieee80211_node *);
  96 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
  97 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
  98 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
  99                     const uint8_t *);
 100 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
 101
 102 /*
 103  * Timeout values come from the specification and are in milliseconds.
 104  */
 105 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
 106     "IEEE 802.11s parameters");
 107 static int      ieee80211_mesh_gateint = -1;
 108 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint,
 109     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 110     &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
 111     "mesh gate interval (ms)");
 112 static int ieee80211_mesh_retrytimeout = -1;
 113 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout,
 114     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 115     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 116     "Retry timeout (msec)");
 117 static int ieee80211_mesh_holdingtimeout = -1;
 118
 119 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout,
 120     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 121     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 122     "Holding state timeout (msec)");
 123 static int ieee80211_mesh_confirmtimeout = -1;
 124 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout,
 125     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 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,
 130     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 131     &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 132     "Backoff timeout (msec). This is to throutles peering forever when "
 133     "not receiving answer or is rejected by a neighbor");
 134 static int ieee80211_mesh_maxretries = 2;
 135 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW,
 136     &ieee80211_mesh_maxretries, 0,
 137     "Maximum retries during peer link establishment");
 138 static int ieee80211_mesh_maxholding = 2;
 139 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW,
 140     &ieee80211_mesh_maxholding, 0,
 141     "Maximum times we are allowed to transition to HOLDING state before "
 142     "backinoff during peer link establishment");
 143
 144 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
 145         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 146
 147 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
 148 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
 149 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
 150 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
 151 static  ieee80211_recv_action_func mesh_recv_action_meshgate;
 152
 153 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
 154 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
 155 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
 156 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
 157 static  ieee80211_send_action_func mesh_send_action_meshgate;
 158
 159 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
 160         .mpm_descr      = "AIRTIME",
 161         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
 162         .mpm_metric     = mesh_airtime_calc,
 163 };
 164
 165 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
 166 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
 167
 168 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
 169 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
 170 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
 171
 172 /* The longer one of the lifetime should be stored as new lifetime */
 173 #define MESH_ROUTE_LIFETIME_MAX(a, b)   (a > b ? a : b)
 174
 175 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
 176 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
 177
 178 /*
 179  * Helper functions to manipulate the Mesh routing table.
 180  */
 181
 182 static struct ieee80211_mesh_route *
 183 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
 184     const uint8_t dest[IEEE80211_ADDR_LEN])
 185 {
 186         struct ieee80211_mesh_route *rt;
 187
 188         MESH_RT_LOCK_ASSERT(ms);
 189
 190         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 191                 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
 192                         return rt;
 193         }
 194         return NULL;
 195 }
 196
 197 static struct ieee80211_mesh_route *
 198 mesh_rt_add_locked(struct ieee80211vap *vap,
 199     const uint8_t dest[IEEE80211_ADDR_LEN])
 200 {
 201         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 202         struct ieee80211_mesh_route *rt;
 203
 204         KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
 205             ("%s: adding broadcast to the routing table", __func__));
 206
 207         MESH_RT_LOCK_ASSERT(ms);
 208
 209         rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) +
 210             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT,
 211             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 212         if (rt != NULL) {
 213                 rt->rt_vap = vap;
 214                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
 215                 rt->rt_priv = (void *)ALIGN(&rt[1]);
 216                 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT");
 217                 callout_init(&rt->rt_discovery, 1);
 218                 rt->rt_updtime = ticks; /* create time */
 219                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
 220         }
 221         return rt;
 222 }
 223
 224 struct ieee80211_mesh_route *
 225 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
 226     const uint8_t dest[IEEE80211_ADDR_LEN])
 227 {
 228         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 229         struct ieee80211_mesh_route *rt;
 230
 231         MESH_RT_LOCK(ms);
 232         rt = mesh_rt_find_locked(ms, dest);
 233         MESH_RT_UNLOCK(ms);
 234         return rt;
 235 }
 236
 237 struct ieee80211_mesh_route *
 238 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
 239     const uint8_t dest[IEEE80211_ADDR_LEN])
 240 {
 241         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 242         struct ieee80211_mesh_route *rt;
 243
 244         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
 245             ("%s: duplicate entry in the routing table", __func__));
 246         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
 247             ("%s: adding self to the routing table", __func__));
 248
 249         MESH_RT_LOCK(ms);
 250         rt = mesh_rt_add_locked(vap, dest);
 251         MESH_RT_UNLOCK(ms);
 252         return rt;
 253 }
 254
 255 /*
 256  * Update the route lifetime and returns the updated lifetime.
 257  * If new_lifetime is zero and route is timedout it will be invalidated.
 258  * new_lifetime is in msec
 259  */
 260 int
 261 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
 262 {
 263         int timesince, now;
 264         uint32_t lifetime = 0;
 265
 266         KASSERT(rt != NULL, ("route is NULL"));
 267
 268         now = ticks;
 269         MESH_RT_ENTRY_LOCK(rt);
 270
 271         /* dont clobber a proxy entry gated by us */
 272         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
 273                 MESH_RT_ENTRY_UNLOCK(rt);
 274                 return rt->rt_lifetime;
 275         }
 276
 277         timesince = ticks_to_msecs(now - rt->rt_updtime);
 278         rt->rt_updtime = now;
 279         if (timesince >= rt->rt_lifetime) {
 280                 if (new_lifetime != 0) {
 281                         rt->rt_lifetime = new_lifetime;
 282                 }
 283                 else {
 284                         rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
 285                         rt->rt_lifetime = 0;
 286                 }
 287         } else {
 288                 /* update what is left of lifetime */
 289                 rt->rt_lifetime = rt->rt_lifetime - timesince;
 290                 rt->rt_lifetime  = MESH_ROUTE_LIFETIME_MAX(
 291                         new_lifetime, rt->rt_lifetime);
 292         }
 293         lifetime = rt->rt_lifetime;
 294         MESH_RT_ENTRY_UNLOCK(rt);
 295
 296         return lifetime;
 297 }
 298
 299 /*
 300  * Add a proxy route (as needed) for the specified destination.
 301  */
 302 void
 303 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
 304     const uint8_t dest[IEEE80211_ADDR_LEN])
 305 {
 306         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 307         struct ieee80211_mesh_route *rt;
 308
 309         MESH_RT_LOCK(ms);
 310         rt = mesh_rt_find_locked(ms, dest);
 311         if (rt == NULL) {
 312                 rt = mesh_rt_add_locked(vap, dest);
 313                 if (rt == NULL) {
 314                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 315                             "%s", "unable to add proxy entry");
 316                         vap->iv_stats.is_mesh_rtaddfailed++;
 317                 } else {
 318                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 319                             "%s", "add proxy entry");
 320                         IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
 321                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 322                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 323                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
 324                 }
 325         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 326                 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
 327                     ("no proxy flag for poxy entry"));
 328                 struct ieee80211com *ic = vap->iv_ic;
 329                 /*
 330                  * Fix existing entry created by received frames from
 331                  * stations that have some memory of dest.  We also
 332                  * flush any frames held on the staging queue; delivering
 333                  * them is too much trouble right now.
 334                  */
 335                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 336                     "%s", "fix proxy entry");
 337                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 338                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 339                              |  IEEE80211_MESHRT_FLAGS_PROXY;
 340                 /* XXX belongs in hwmp */
 341                 ieee80211_ageq_drain_node(&ic->ic_stageq,
 342                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
 343                 /* XXX stat? */
 344         }
 345         MESH_RT_UNLOCK(ms);
 346 }
 347
 348 static __inline void
 349 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
 350 {
 351         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
 352         /*
 353          * Grab the lock before destroying it, to be sure no one else
 354          * is holding the route.
 355          */
 356         MESH_RT_ENTRY_LOCK(rt);
 357         callout_drain(&rt->rt_discovery);
 358         MESH_RT_ENTRY_LOCK_DESTROY(rt);
 359         IEEE80211_FREE(rt, M_80211_MESH_RT);
 360 }
 361
 362 void
 363 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
 364     const uint8_t dest[IEEE80211_ADDR_LEN])
 365 {
 366         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 367         struct ieee80211_mesh_route *rt, *next;
 368
 369         MESH_RT_LOCK(ms);
 370         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 371                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
 372                         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
 373                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 374                                     IEEE80211_REASON_MESH_PERR_NO_PROXY);
 375                         } else {
 376                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 377                                     IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
 378                         }
 379                         mesh_rt_del(ms, rt);
 380                         MESH_RT_UNLOCK(ms);
 381                         return;
 382                 }
 383         }
 384         MESH_RT_UNLOCK(ms);
 385 }
 386
 387 void
 388 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
 389 {
 390         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 391         struct ieee80211_mesh_route *rt, *next;
 392
 393         if (ms == NULL)
 394                 return;
 395         MESH_RT_LOCK(ms);
 396         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
 397                 mesh_rt_del(ms, rt);
 398         MESH_RT_UNLOCK(ms);
 399 }
 400
 401 void
 402 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
 403     const uint8_t peer[IEEE80211_ADDR_LEN])
 404 {
 405         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 406         struct ieee80211_mesh_route *rt, *next;
 407
 408         MESH_RT_LOCK(ms);
 409         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 410                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
 411                         mesh_rt_del(ms, rt);
 412         }
 413         MESH_RT_UNLOCK(ms);
 414 }
 415
 416 /*
 417  * Flush expired routing entries, i.e. those in invalid state for
 418  * some time.
 419  */
 420 static void
 421 mesh_rt_flush_invalid(struct ieee80211vap *vap)
 422 {
 423         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 424         struct ieee80211_mesh_route *rt, *next;
 425
 426         if (ms == NULL)
 427                 return;
 428         MESH_RT_LOCK(ms);
 429         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 430                 /* Discover paths will be deleted by their own callout */
 431                 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
 432                         continue;
 433                 ieee80211_mesh_rt_update(rt, 0);
 434                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
 435                         mesh_rt_del(ms, rt);
 436         }
 437         MESH_RT_UNLOCK(ms);
 438 }
 439
 440 int
 441 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
 442 {
 443         int i, firstempty = -1;
 444
 445         for (i = 0; i < nitems(mesh_proto_paths); i++) {
 446                 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
 447                     IEEE80211_MESH_PROTO_DSZ) == 0)
 448                         return EEXIST;
 449                 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
 450                         firstempty = i;
 451         }
 452         if (firstempty < 0)
 453                 return ENOSPC;
 454         memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
 455         mesh_proto_paths[firstempty].mpp_active = 1;
 456         return 0;
 457 }
 458
 459 int
 460 ieee80211_mesh_register_proto_metric(const struct
 461     ieee80211_mesh_proto_metric *mpm)
 462 {
 463         int i, firstempty = -1;
 464
 465         for (i = 0; i < nitems(mesh_proto_metrics); i++) {
 466                 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
 467                     IEEE80211_MESH_PROTO_DSZ) == 0)
 468                         return EEXIST;
 469                 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
 470                         firstempty = i;
 471         }
 472         if (firstempty < 0)
 473                 return ENOSPC;
 474         memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
 475         mesh_proto_metrics[firstempty].mpm_active = 1;
 476         return 0;
 477 }
 478
 479 static int
 480 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
 481 {
 482         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 483         int i;
 484
 485         for (i = 0; i < nitems(mesh_proto_paths); i++) {
 486                 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
 487                         ms->ms_ppath = &mesh_proto_paths[i];
 488                         return 0;
 489                 }
 490         }
 491         return ENOENT;
 492 }
 493
 494 static int
 495 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
 496 {
 497         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 498         int i;
 499
 500         for (i = 0; i < nitems(mesh_proto_metrics); i++) {
 501                 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
 502                         ms->ms_pmetric = &mesh_proto_metrics[i];
 503                         return 0;
 504                 }
 505         }
 506         return ENOENT;
 507 }
 508
 509 static void
 510 mesh_gatemode_setup(struct ieee80211vap *vap)
 511 {
 512         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 513
 514         /*
 515          * NB: When a mesh gate is running as a ROOT it shall
 516          * not send out periodic GANNs but instead mark the
 517          * mesh gate flag for the corresponding proactive PREQ
 518          * and RANN frames.
 519          */
 520         if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
 521             (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
 522                 callout_drain(&ms->ms_gatetimer);
 523                 return ;
 524         }
 525         callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
 526             mesh_gatemode_cb, vap);
 527 }
 528
 529 static void
 530 mesh_gatemode_cb(void *arg)
 531 {
 532         struct ieee80211vap *vap = (struct ieee80211vap *)arg;
 533         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 534         struct ieee80211_meshgann_ie gann;
 535
 536         gann.gann_flags = 0; /* Reserved */
 537         gann.gann_hopcount = 0;
 538         gann.gann_ttl = ms->ms_ttl;
 539         IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
 540         gann.gann_seq = ms->ms_gateseq++;
 541         gann.gann_interval = ieee80211_mesh_gateint;
 542
 543         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
 544             "send broadcast GANN (seq %u)", gann.gann_seq);
 545
 546         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
 547             IEEE80211_ACTION_MESH_GANN, &gann);
 548         mesh_gatemode_setup(vap);
 549 }
 550
 551 static void
 552 ieee80211_mesh_init(void)
 553 {
 554
 555         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
 556         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
 557
 558         /*
 559          * Setup mesh parameters that depends on the clock frequency.
 560          */
 561         ieee80211_mesh_gateint = msecs_to_ticks(10000);
 562         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
 563         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
 564         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
 565         ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
 566
 567         /*
 568          * Register action frame handlers.
 569          */
 570         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 571             IEEE80211_ACTION_MESHPEERING_OPEN,
 572             mesh_recv_action_meshpeering_open);
 573         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 574             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 575             mesh_recv_action_meshpeering_confirm);
 576         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 577             IEEE80211_ACTION_MESHPEERING_CLOSE,
 578             mesh_recv_action_meshpeering_close);
 579         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 580             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
 581         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 582             IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
 583
 584         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 585             IEEE80211_ACTION_MESHPEERING_OPEN,
 586             mesh_send_action_meshpeering_open);
 587         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 588             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 589             mesh_send_action_meshpeering_confirm);
 590         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 591             IEEE80211_ACTION_MESHPEERING_CLOSE,
 592             mesh_send_action_meshpeering_close);
 593         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 594             IEEE80211_ACTION_MESH_LMETRIC,
 595             mesh_send_action_meshlmetric);
 596         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 597             IEEE80211_ACTION_MESH_GANN,
 598             mesh_send_action_meshgate);
 599
 600         /*
 601          * Register Airtime Link Metric.
 602          */
 603         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
 604
 605 }
 606 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
 607
 608 void
 609 ieee80211_mesh_attach(struct ieee80211com *ic)
 610 {
 611         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
 612 }
 613
 614 void
 615 ieee80211_mesh_detach(struct ieee80211com *ic)
 616 {
 617 }
 618
 619 static void
 620 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
 621 {
 622         struct ieee80211com *ic = ni->ni_ic;
 623         uint16_t args[3];
 624
 625         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
 626                 args[0] = ni->ni_mlpid;
 627                 args[1] = ni->ni_mllid;
 628                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 629                 ieee80211_send_action(ni,
 630                     IEEE80211_ACTION_CAT_SELF_PROT,
 631                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 632                     args);
 633         }
 634         callout_drain(&ni->ni_mltimer);
 635         /* XXX belongs in hwmp */
 636         ieee80211_ageq_drain_node(&ic->ic_stageq,
 637            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
 638 }
 639
 640 static void
 641 mesh_vdetach(struct ieee80211vap *vap)
 642 {
 643         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 644
 645         callout_drain(&ms->ms_cleantimer);
 646         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
 647             NULL);
 648         ieee80211_mesh_rt_flush(vap);
 649         MESH_RT_LOCK_DESTROY(ms);
 650         ms->ms_ppath->mpp_vdetach(vap);
 651         IEEE80211_FREE(vap->iv_mesh, M_80211_VAP);
 652         vap->iv_mesh = NULL;
 653 }
 654
 655 static void
 656 mesh_vattach(struct ieee80211vap *vap)
 657 {
 658         struct ieee80211_mesh_state *ms;
 659         vap->iv_newstate = mesh_newstate;
 660         vap->iv_input = mesh_input;
 661         vap->iv_opdetach = mesh_vdetach;
 662         vap->iv_recv_mgmt = mesh_recv_mgmt;
 663         vap->iv_recv_ctl = mesh_recv_ctl;
 664         ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
 665             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 666         if (ms == NULL) {
 667                 printf("%s: couldn't alloc MBSS state\n", __func__);
 668                 return;
 669         }
 670         vap->iv_mesh = ms;
 671         ms->ms_seq = 0;
 672         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
 673         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
 674         TAILQ_INIT(&ms->ms_known_gates);
 675         TAILQ_INIT(&ms->ms_routes);
 676         MESH_RT_LOCK_INIT(ms, "MBSS");
 677         callout_init(&ms->ms_cleantimer, 1);
 678         callout_init(&ms->ms_gatetimer, 1);
 679         ms->ms_gateseq = 0;
 680         mesh_select_proto_metric(vap, "AIRTIME");
 681         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
 682         mesh_select_proto_path(vap, "HWMP");
 683         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
 684         ms->ms_ppath->mpp_vattach(vap);
 685 }
 686
 687 /*
 688  * IEEE80211_M_MBSS vap state machine handler.
 689  */
 690 static int
 691 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 692 {
 693         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 694         struct ieee80211com *ic = vap->iv_ic;
 695         struct ieee80211_node *ni;
 696         enum ieee80211_state ostate;
 697
 698         IEEE80211_LOCK_ASSERT(ic);
 699
 700         ostate = vap->iv_state;
 701         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 702             __func__, ieee80211_state_name[ostate],
 703             ieee80211_state_name[nstate], arg);
 704         vap->iv_state = nstate;         /* state transition */
 705         if (ostate != IEEE80211_S_SCAN)
 706                 ieee80211_cancel_scan(vap);     /* background scan */
 707         ni = vap->iv_bss;                       /* NB: no reference held */
 708         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
 709                 callout_drain(&ms->ms_cleantimer);
 710                 callout_drain(&ms->ms_gatetimer);
 711         }
 712         switch (nstate) {
 713         case IEEE80211_S_INIT:
 714                 switch (ostate) {
 715                 case IEEE80211_S_SCAN:
 716                         ieee80211_cancel_scan(vap);
 717                         break;
 718                 case IEEE80211_S_CAC:
 719                         ieee80211_dfs_cac_stop(vap);
 720                         break;
 721                 case IEEE80211_S_RUN:
 722                         ieee80211_iterate_nodes(&ic->ic_sta,
 723                             mesh_vdetach_peers, NULL);
 724                         break;
 725                 default:
 726                         break;
 727                 }
 728                 if (ostate != IEEE80211_S_INIT) {
 729                         /* NB: optimize INIT -> INIT case */
 730                         ieee80211_reset_bss(vap);
 731                         ieee80211_mesh_rt_flush(vap);
 732                 }
 733                 break;
 734         case IEEE80211_S_SCAN:
 735                 switch (ostate) {
 736                 case IEEE80211_S_INIT:
 737                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 738                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
 739                             ms->ms_idlen != 0) {
 740                                 /*
 741                                  * Already have a channel and a mesh ID; bypass
 742                                  * the scan and startup immediately.
 743                                  */
 744                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 745                                 break;
 746                         }
 747                         /*
 748                          * Initiate a scan.  We can come here as a result
 749                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 750                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 751                          * and the scan request parameters will be present
 752                          * in iv_scanreq.  Otherwise we do the default.
 753                         */
 754                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 755                                 ieee80211_check_scan(vap,
 756                                     vap->iv_scanreq_flags,
 757                                     vap->iv_scanreq_duration,
 758                                     vap->iv_scanreq_mindwell,
 759                                     vap->iv_scanreq_maxdwell,
 760                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 761                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 762                         } else
 763                                 ieee80211_check_scan_current(vap);
 764                         break;
 765                 default:
 766                         break;
 767                 }
 768                 break;
 769         case IEEE80211_S_CAC:
 770                 /*
 771                  * Start CAC on a DFS channel.  We come here when starting
 772                  * a bss on a DFS channel (see ieee80211_create_ibss).
 773                  */
 774                 ieee80211_dfs_cac_start(vap);
 775                 break;
 776         case IEEE80211_S_RUN:
 777                 switch (ostate) {
 778                 case IEEE80211_S_INIT:
 779                         /*
 780                          * Already have a channel; bypass the
 781                          * scan and startup immediately.
 782                          * Note that ieee80211_create_ibss will call
 783                          * back to do a RUN->RUN state change.
 784                          */
 785                         ieee80211_create_ibss(vap,
 786                             ieee80211_ht_adjust_channel(ic,
 787                                 ic->ic_curchan, vap->iv_flags_ht));
 788                         /* NB: iv_bss is changed on return */
 789                         break;
 790                 case IEEE80211_S_CAC:
 791                         /*
 792                          * NB: This is the normal state change when CAC
 793                          * expires and no radar was detected; no need to
 794                          * clear the CAC timer as it's already expired.
 795                          */
 796                         /* fall thru... */
 797                 case IEEE80211_S_CSA:
 798 #if 0
 799                         /*
 800                          * Shorten inactivity timer of associated stations
 801                          * to weed out sta's that don't follow a CSA.
 802                          */
 803                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 804 #endif
 805                         /*
 806                          * Update bss node channel to reflect where
 807                          * we landed after CSA.
 808                          */
 809                         ieee80211_node_set_chan(ni,
 810                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 811                                 ieee80211_htchanflags(ni->ni_chan)));
 812                         /* XXX bypass debug msgs */
 813                         break;
 814                 case IEEE80211_S_SCAN:
 815                 case IEEE80211_S_RUN:
 816 #ifdef IEEE80211_DEBUG
 817                         if (ieee80211_msg_debug(vap)) {
 818                                 ieee80211_note(vap,
 819                                     "synchronized with %s meshid ",
 820                                     ether_sprintf(ni->ni_meshid));
 821                                 ieee80211_print_essid(ni->ni_meshid,
 822                                     ni->ni_meshidlen);
 823                                 /* XXX MCS/HT */
 824                                 printf(" channel %d\n",
 825                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
 826                         }
 827 #endif
 828                         break;
 829                 default:
 830                         break;
 831                 }
 832                 ieee80211_node_authorize(ni);
 833                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 834                     mesh_rt_cleanup_cb, vap);
 835                 mesh_gatemode_setup(vap);
 836                 break;
 837         default:
 838                 break;
 839         }
 840         /* NB: ostate not nstate */
 841         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
 842         return 0;
 843 }
 844
 845 static void
 846 mesh_rt_cleanup_cb(void *arg)
 847 {
 848         struct ieee80211vap *vap = arg;
 849         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 850
 851         mesh_rt_flush_invalid(vap);
 852         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 853             mesh_rt_cleanup_cb, vap);
 854 }
 855
 856 /*
 857  * Mark a mesh STA as gate and return a pointer to it.
 858  * If this is first time, we create a new gate route.
 859  * Always update the path route to this mesh gate.
 860  */
 861 struct ieee80211_mesh_gate_route *
 862 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
 863     struct ieee80211_mesh_route *rt)
 864 {
 865         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 866         struct ieee80211_mesh_gate_route *gr = NULL, *next;
 867         int found = 0;
 868
 869         MESH_RT_LOCK(ms);
 870         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
 871                 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
 872                         found = 1;
 873                         break;
 874                 }
 875         }
 876
 877         if (!found) {
 878                 /* New mesh gate add it to known table. */
 879                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
 880                     "%s", "stored new gate information from pro-PREQ.");
 881                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
 882                     M_80211_MESH_GT_RT,
 883                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 884                 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
 885                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
 886         }
 887         gr->gr_route = rt;
 888         /* TODO: link from path route to gate route */
 889         MESH_RT_UNLOCK(ms);
 890
 891         return gr;
 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                 net80211_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, IEEE80211_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, IEEE80211_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         MPASS((mcopy->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
1229         mcopy->m_pkthdr.rcvif = (void *) ni;
1230
1231         /*
1232          * XXX this bypasses all of the VAP TX handling; it passes frames
1233          * directly to the parent interface.
1234          *
1235          * Because of this, there's no TX lock being held as there's no
1236          * encaps state being used.
1237          *
1238          * Doing a direct parent transmit may not be the correct thing
1239          * to do here; we'll have to re-think this soon.
1240          */
1241         IEEE80211_TX_LOCK(ic);
1242         err = ieee80211_parent_xmitpkt(ic, mcopy);
1243         IEEE80211_TX_UNLOCK(ic);
1244         if (!err)
1245                 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
1246 }
1247
1248 static struct mbuf *
1249 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1250 {
1251 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1252 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1253         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1254                   sizeof(struct ieee80211_meshcntl_ae10)];
1255         const struct ieee80211_qosframe_addr4 *wh;
1256         const struct ieee80211_meshcntl_ae10 *mc;
1257         struct ether_header *eh;
1258         struct llc *llc;
1259         int ae;
1260
1261         if (m->m_len < hdrlen + sizeof(*llc) &&
1262             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1263                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1264                     "discard data frame: %s", "m_pullup failed");
1265                 vap->iv_stats.is_rx_tooshort++;
1266                 return NULL;
1267         }
1268         memcpy(b, mtod(m, caddr_t), hdrlen);
1269         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1270         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1271         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1272                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1273             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1274
1275         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1276         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1277             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1278             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1279             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1280             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1281               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1282                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1283                 llc = NULL;
1284         } else {
1285                 m_adj(m, hdrlen - sizeof(*eh));
1286         }
1287         eh = mtod(m, struct ether_header *);
1288         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1289         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1290                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1291                 if (ae == IEEE80211_MESH_AE_00) {
1292                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1293                 } else if (ae == IEEE80211_MESH_AE_01) {
1294                         IEEE80211_ADDR_COPY(eh->ether_shost,
1295                             MC01(mc)->mc_addr4);
1296                 } else {
1297                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1298                             (const struct ieee80211_frame *)wh, NULL,
1299                             "bad AE %d", ae);
1300                         vap->iv_stats.is_mesh_badae++;
1301                         m_freem(m);
1302                         return NULL;
1303                 }
1304         } else {
1305                 if (ae == IEEE80211_MESH_AE_00) {
1306                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1307                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1308                 } else if (ae == IEEE80211_MESH_AE_10) {
1309                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1310                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1311                 } else {
1312                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1313                             (const struct ieee80211_frame *)wh, NULL,
1314                             "bad AE %d", ae);
1315                         vap->iv_stats.is_mesh_badae++;
1316                         m_freem(m);
1317                         return NULL;
1318                 }
1319         }
1320 #ifndef __NO_STRICT_ALIGNMENT
1321         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1322                 m = ieee80211_realign(vap, m, sizeof(*eh));
1323                 if (m == NULL)
1324                         return NULL;
1325         }
1326 #endif /* !__NO_STRICT_ALIGNMENT */
1327         if (llc != NULL) {
1328                 eh = mtod(m, struct ether_header *);
1329                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1330         }
1331         return m;
1332 #undef  WDIR
1333 #undef  MC01
1334 }
1335
1336 /*
1337  * Return non-zero if the unicast mesh data frame should be processed
1338  * locally.  Frames that are not proxy'd have our address, otherwise
1339  * we need to consult the routing table to look for a proxy entry.
1340  */
1341 static __inline int
1342 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1343     const struct ieee80211_meshcntl *mc)
1344 {
1345         int ae = mc->mc_flags & 3;
1346
1347         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1348             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1349         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1350             ("bad AE %d", ae));
1351         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
1352                 const struct ieee80211_meshcntl_ae10 *mc10 =
1353                     (const struct ieee80211_meshcntl_ae10 *) mc;
1354                 struct ieee80211_mesh_route *rt =
1355                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1356                 /* check for proxy route to ourself */
1357                 return (rt != NULL &&
1358                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1359         } else                                  /* ucast w/o proxy */
1360                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1361 }
1362
1363 /*
1364  * Verifies transmitter, updates lifetime, precursor list and forwards data.
1365  * > 0 means we have forwarded data and no need to process locally
1366  * == 0 means we want to process locally (and we may have forwarded data
1367  * < 0 means there was an error and data should be discarded
1368  */
1369 static int
1370 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1371     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1372 {
1373         struct ieee80211_qosframe_addr4 *qwh;
1374         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1375         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1376
1377         /* This is called from the RX path - don't hold this lock */
1378         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1379
1380         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1381
1382         /*
1383          * TODO:
1384          * o verify addr2 is  a legitimate transmitter
1385          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1386          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1387          */
1388
1389         /* set lifetime of addr3 (meshDA) to initial value */
1390         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1391         if (rt_meshda == NULL) {
1392                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1393                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
1394                 /*
1395                  * [Optional] any of the following three actions:
1396                  * o silently discard                           [X]
1397                  * o trigger a path discovery                   [ ]
1398                  * o inform TA that meshDA is unknown.          [ ]
1399                  */
1400                 /* XXX: stats */
1401                 return (-1);
1402         }
1403
1404         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1405             ms->ms_ppath->mpp_inact));
1406
1407         /* set lifetime of addr4 (meshSA) to initial value */
1408         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1409         KASSERT(rt_meshsa != NULL, ("no route"));
1410         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1411             ms->ms_ppath->mpp_inact));
1412
1413         mesh_forward(vap, m, mc);
1414         return (1); /* dont process locally */
1415 }
1416
1417 /*
1418  * Verifies transmitter, updates lifetime, precursor list and process data
1419  * locally, if data is proxy with AE = 10 it could mean data should go
1420  * on another mesh path or data should be forwarded to the DS.
1421  *
1422  * > 0 means we have forwarded data and no need to process locally
1423  * == 0 means we want to process locally (and we may have forwarded data
1424  * < 0 means there was an error and data should be discarded
1425  */
1426 static int
1427 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1428     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1429 {
1430         struct ieee80211_qosframe_addr4 *qwh;
1431         const struct ieee80211_meshcntl_ae10 *mc10;
1432         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1433         struct ieee80211_mesh_route *rt;
1434         int ae;
1435
1436         /* This is called from the RX path - don't hold this lock */
1437         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1438
1439         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1440         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1441
1442         /*
1443          * TODO:
1444          * o verify addr2 is  a legitimate transmitter
1445          * o lifetime of precursor entry is max(init, curr)
1446          */
1447
1448         /* set lifetime of addr4 (meshSA) to initial value */
1449         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1450         KASSERT(rt != NULL, ("no route"));
1451         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1452         rt = NULL;
1453
1454         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1455         KASSERT(ae == IEEE80211_MESH_AE_00 ||
1456             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1457         if (ae == IEEE80211_MESH_AE_10) {
1458                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1459                         return (0); /* process locally */
1460                 }
1461
1462                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1463                 if (rt != NULL &&
1464                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1465                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1466                         /*
1467                          * Forward on another mesh-path, according to
1468                          * amendment as specified in 9.32.4.1
1469                          */
1470                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1471                         mesh_forward(vap, m,
1472                             (const struct ieee80211_meshcntl *)mc10);
1473                         return (1); /* dont process locally */
1474                 }
1475                 /*
1476                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
1477                  * addressed according to 13.11.3.2.
1478                  */
1479                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1480                     "forward frame to DS, SA(%6D) DA(%6D)",
1481                     mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1482         }
1483         return (0); /* process locally */
1484 }
1485
1486 /*
1487  * Try to forward the group addressed data on to other mesh STAs, and
1488  * also to the DS.
1489  *
1490  * > 0 means we have forwarded data and no need to process locally
1491  * == 0 means we want to process locally (and we may have forwarded data
1492  * < 0 means there was an error and data should be discarded
1493  */
1494 static int
1495 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1496     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1497 {
1498 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1499         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1500
1501         /* This is called from the RX path - don't hold this lock */
1502         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1503
1504         mesh_forward(vap, m, mc);
1505
1506         if(mc->mc_ttl > 0) {
1507                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1508                         /*
1509                          * Forward of MSDUs from the MBSS to DS group addressed
1510                          * (according to 13.11.3.2)
1511                          * This happens by delivering the packet, and a bridge
1512                          * will sent it on another port member.
1513                          */
1514                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1515                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD) {
1516                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1517                                     MC01(mc)->mc_addr4, "%s",
1518                                     "forward from MBSS to the DS");
1519                         }
1520                 }
1521         }
1522         return (0); /* process locally */
1523 #undef  MC01
1524 }
1525
1526 static int
1527 mesh_input(struct ieee80211_node *ni, struct mbuf *m,
1528     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1529 {
1530 #define HAS_SEQ(type)   ((type & 0x4) == 0)
1531 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1532         struct ieee80211vap *vap = ni->ni_vap;
1533         struct ieee80211com *ic = ni->ni_ic;
1534         struct ifnet *ifp = vap->iv_ifp;
1535         struct ieee80211_frame *wh;
1536         const struct ieee80211_meshcntl *mc;
1537         int hdrspace, meshdrlen, need_tap, error;
1538         uint8_t dir, type, subtype, ae;
1539         uint32_t seq;
1540         const uint8_t *addr;
1541         uint8_t qos[2];
1542
1543         KASSERT(ni != NULL, ("null node"));
1544         ni->ni_inact = ni->ni_inact_reload;
1545
1546         need_tap = 1;                   /* mbuf need to be tapped. */
1547         type = -1;                      /* undefined */
1548
1549         /* This is called from the RX path - don't hold this lock */
1550         IEEE80211_TX_UNLOCK_ASSERT(ic);
1551
1552         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1553                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1554                     ni->ni_macaddr, NULL,
1555                     "too short (1): len %u", m->m_pkthdr.len);
1556                 vap->iv_stats.is_rx_tooshort++;
1557                 goto out;
1558         }
1559         /*
1560          * Bit of a cheat here, we use a pointer for a 3-address
1561          * frame format but don't reference fields past outside
1562          * ieee80211_frame_min w/o first validating the data is
1563          * present.
1564         */
1565         wh = mtod(m, struct ieee80211_frame *);
1566
1567         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1568             IEEE80211_FC0_VERSION_0) {
1569                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1570                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1571                 vap->iv_stats.is_rx_badversion++;
1572                 goto err;
1573         }
1574         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1575         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1576         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1577         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1578                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1579                 ni->ni_noise = nf;
1580                 if (HAS_SEQ(type)) {
1581                         uint8_t tid = ieee80211_gettid(wh);
1582
1583                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
1584                             TID_TO_WME_AC(tid) >= WME_AC_VI)
1585                                 ic->ic_wme.wme_hipri_traffic++;
1586                         if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs))
1587                                 goto out;
1588                 }
1589         }
1590 #ifdef IEEE80211_DEBUG
1591         /*
1592          * It's easier, but too expensive, to simulate different mesh
1593          * topologies by consulting the ACL policy very early, so do this
1594          * only under DEBUG.
1595          *
1596          * NB: this check is also done upon peering link initiation.
1597          */
1598         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1599                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1600                     wh, NULL, "%s", "disallowed by ACL");
1601                 vap->iv_stats.is_rx_acl++;
1602                 goto out;
1603         }
1604 #endif
1605         switch (type) {
1606         case IEEE80211_FC0_TYPE_DATA:
1607                 if (ni == vap->iv_bss)
1608                         goto out;
1609                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1610                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1611                             ni->ni_macaddr, NULL,
1612                             "peer link not yet established (%d)",
1613                             ni->ni_mlstate);
1614                         vap->iv_stats.is_mesh_nolink++;
1615                         goto out;
1616                 }
1617                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1618                     dir != IEEE80211_FC1_DIR_DSTODS) {
1619                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1620                             wh, "data", "incorrect dir 0x%x", dir);
1621                         vap->iv_stats.is_rx_wrongdir++;
1622                         goto err;
1623                 }
1624
1625                 /* All Mesh data frames are QoS subtype */
1626                 if (!HAS_SEQ(type)) {
1627                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1628                             wh, "data", "incorrect subtype 0x%x", subtype);
1629                         vap->iv_stats.is_rx_badsubtype++;
1630                         goto err;
1631                 }
1632
1633                 /*
1634                  * Next up, any fragmentation.
1635                  * XXX: we defrag before we even try to forward,
1636                  * Mesh Control field is not present in sub-sequent
1637                  * fragmented frames. This is in contrast to Draft 4.0.
1638                  */
1639                 hdrspace = ieee80211_hdrspace(ic, wh);
1640                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1641                         m = ieee80211_defrag(ni, m, hdrspace, 0);
1642                         if (m == NULL) {
1643                                 /* Fragment dropped or frame not complete yet */
1644                                 goto out;
1645                         }
1646                 }
1647                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1648
1649                 /*
1650                  * Now we have a complete Mesh Data frame.
1651                  */
1652
1653                 /*
1654                  * Only fromDStoDS data frames use 4 address qos frames
1655                  * as specified in amendment. Otherwise addr4 is located
1656                  * in the Mesh Control field and a 3 address qos frame
1657                  * is used.
1658                  */
1659                 *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh);
1660
1661                 /*
1662                  * NB: The mesh STA sets the Mesh Control Present
1663                  * subfield to 1 in the Mesh Data frame containing
1664                  * an unfragmented MSDU, an A-MSDU, or the first
1665                  * fragment of an MSDU.
1666                  * After defrag it should always be present.
1667                  */
1668                 if (!(qos[1] & IEEE80211_QOS_MC)) {
1669                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1670                             ni->ni_macaddr, NULL,
1671                             "%s", "Mesh control field not present");
1672                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1673                         goto err;
1674                 }
1675
1676                 /* pull up enough to get to the mesh control */
1677                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1678                     (m = m_pullup(m, hdrspace +
1679                         sizeof(struct ieee80211_meshcntl))) == NULL) {
1680                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1681                             ni->ni_macaddr, NULL,
1682                             "data too short: expecting %u", hdrspace);
1683                         vap->iv_stats.is_rx_tooshort++;
1684                         goto out;               /* XXX */
1685                 }
1686                 /*
1687                  * Now calculate the full extent of the headers. Note
1688                  * mesh_decap will pull up anything we didn't get
1689                  * above when it strips the 802.11 headers.
1690                  */
1691                 mc = (const struct ieee80211_meshcntl *)
1692                     (mtod(m, const uint8_t *) + hdrspace);
1693                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1694                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1695                     ae * IEEE80211_ADDR_LEN;
1696                 hdrspace += meshdrlen;
1697
1698                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1699                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1700                     (m->m_len < hdrspace) &&
1701                     ((m = m_pullup(m, hdrspace)) == NULL)) {
1702                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1703                             ni->ni_macaddr, NULL,
1704                             "data too short: expecting %u", hdrspace);
1705                         vap->iv_stats.is_rx_tooshort++;
1706                         goto out;               /* XXX */
1707                 }
1708                 /* XXX: are we sure there is no reallocating after m_pullup? */
1709
1710                 seq = le32dec(mc->mc_seq);
1711                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1712                         addr = wh->i_addr3;
1713                 else if (ae == IEEE80211_MESH_AE_01)
1714                         addr = MC01(mc)->mc_addr4;
1715                 else
1716                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1717                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1718                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1719                             addr, "data", "%s", "not to me");
1720                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1721                         goto out;
1722                 }
1723                 if (mesh_checkpseq(vap, addr, seq) != 0) {
1724                         vap->iv_stats.is_rx_dup++;
1725                         goto out;
1726                 }
1727
1728                 /* This code "routes" the frame to the right control path */
1729                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1730                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1731                                 error =
1732                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1733                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1734                                 error = mesh_recv_group_data(vap, m, wh, mc);
1735                         else
1736                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1737                                     wh, mc);
1738                 } else
1739                         error = mesh_recv_group_data(vap, m, wh, mc);
1740                 if (error < 0)
1741                         goto err;
1742                 else if (error > 0)
1743                         goto out;
1744
1745                 if (ieee80211_radiotap_active_vap(vap))
1746                         ieee80211_radiotap_rx(vap, m);
1747                 need_tap = 0;
1748
1749                 /*
1750                  * Finally, strip the 802.11 header.
1751                  */
1752                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1753                 if (m == NULL) {
1754                         /* XXX mask bit to check for both */
1755                         /* don't count Null data frames as errors */
1756                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1757                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1758                                 goto out;
1759                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1760                             ni->ni_macaddr, "data", "%s", "decap error");
1761                         vap->iv_stats.is_rx_decap++;
1762                         IEEE80211_NODE_STAT(ni, rx_decap);
1763                         goto err;
1764                 }
1765                 if (qos[0] & IEEE80211_QOS_AMSDU) {
1766                         m = ieee80211_decap_amsdu(ni, m);
1767                         if (m == NULL)
1768                                 return IEEE80211_FC0_TYPE_DATA;
1769                 }
1770                 ieee80211_deliver_data(vap, ni, m);
1771                 return type;
1772         case IEEE80211_FC0_TYPE_MGT:
1773                 vap->iv_stats.is_rx_mgmt++;
1774                 IEEE80211_NODE_STAT(ni, rx_mgmt);
1775                 if (dir != IEEE80211_FC1_DIR_NODS) {
1776                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1777                             wh, "mgt", "incorrect dir 0x%x", dir);
1778                         vap->iv_stats.is_rx_wrongdir++;
1779                         goto err;
1780                 }
1781                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1782                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1783                             ni->ni_macaddr, "mgt", "too short: len %u",
1784                             m->m_pkthdr.len);
1785                         vap->iv_stats.is_rx_tooshort++;
1786                         goto out;
1787                 }
1788 #ifdef IEEE80211_DEBUG
1789                 if ((ieee80211_msg_debug(vap) &&
1790                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1791                     ieee80211_msg_dumppkts(vap)) {
1792                         if_printf(ifp, "received %s from %s rssi %d\n",
1793                             ieee80211_mgt_subtype_name(subtype),
1794                             ether_sprintf(wh->i_addr2), rssi);
1795                 }
1796 #endif
1797                 if (IEEE80211_IS_PROTECTED(wh)) {
1798                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1799                             wh, NULL, "%s", "WEP set but not permitted");
1800                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1801                         goto out;
1802                 }
1803                 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
1804                 goto out;
1805         case IEEE80211_FC0_TYPE_CTL:
1806                 vap->iv_stats.is_rx_ctl++;
1807                 IEEE80211_NODE_STAT(ni, rx_ctrl);
1808                 goto out;
1809         default:
1810                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1811                     wh, "bad", "frame type 0x%x", type);
1812                 /* should not come here */
1813                 break;
1814         }
1815 err:
1816         if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
1817 out:
1818         if (m != NULL) {
1819                 if (need_tap && ieee80211_radiotap_active_vap(vap))
1820                         ieee80211_radiotap_rx(vap, m);
1821                 m_freem(m);
1822         }
1823         return type;
1824 #undef  HAS_SEQ
1825 #undef  MC01
1826 }
1827
1828 static void
1829 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1830     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1831 {
1832         struct ieee80211vap *vap = ni->ni_vap;
1833         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1834         struct ieee80211com *ic = ni->ni_ic;
1835         struct ieee80211_channel *rxchan = ic->ic_curchan;
1836         struct ieee80211_frame *wh;
1837         struct ieee80211_mesh_route *rt;
1838         uint8_t *frm, *efrm;
1839
1840         wh = mtod(m0, struct ieee80211_frame *);
1841         frm = (uint8_t *)&wh[1];
1842         efrm = mtod(m0, uint8_t *) + m0->m_len;
1843         switch (subtype) {
1844         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1845         case IEEE80211_FC0_SUBTYPE_BEACON:
1846         {
1847                 struct ieee80211_scanparams scan;
1848                 struct ieee80211_channel *c;
1849                 /*
1850                  * We process beacon/probe response
1851                  * frames to discover neighbors.
1852                  */
1853                 if (rxs != NULL) {
1854                         c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1855                         if (c != NULL)
1856                                 rxchan = c;
1857                 }
1858                 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
1859                         return;
1860                 /*
1861                  * Count frame now that we know it's to be processed.
1862                  */
1863                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1864                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
1865                         IEEE80211_NODE_STAT(ni, rx_beacons);
1866                 } else
1867                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1868                 /*
1869                  * If scanning, just pass information to the scan module.
1870                  */
1871                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1872                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1873                                 /*
1874                                  * Actively scanning a channel marked passive;
1875                                  * send a probe request now that we know there
1876                                  * is 802.11 traffic present.
1877                                  *
1878                                  * XXX check if the beacon we recv'd gives
1879                                  * us what we need and suppress the probe req
1880                                  */
1881                                 ieee80211_probe_curchan(vap, 1);
1882                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1883                         }
1884                         ieee80211_add_scan(vap, rxchan, &scan, wh,
1885                             subtype, rssi, nf);
1886                         return;
1887                 }
1888
1889                 /* The rest of this code assumes we are running */
1890                 if (vap->iv_state != IEEE80211_S_RUN)
1891                         return;
1892                 /*
1893                  * Ignore non-mesh STAs.
1894                  */
1895                 if ((scan.capinfo &
1896                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1897                     scan.meshid == NULL || scan.meshconf == NULL) {
1898                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1899                             wh, "beacon", "%s", "not a mesh sta");
1900                         vap->iv_stats.is_mesh_wrongmesh++;
1901                         return;
1902                 }
1903                 /*
1904                  * Ignore STAs for other mesh networks.
1905                  */
1906                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1907                     mesh_verify_meshconf(vap, scan.meshconf)) {
1908                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1909                             wh, "beacon", "%s", "not for our mesh");
1910                         vap->iv_stats.is_mesh_wrongmesh++;
1911                         return;
1912                 }
1913                 /*
1914                  * Peer only based on the current ACL policy.
1915                  */
1916                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1917                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1918                             wh, NULL, "%s", "disallowed by ACL");
1919                         vap->iv_stats.is_rx_acl++;
1920                         return;
1921                 }
1922                 /*
1923                  * Do neighbor discovery.
1924                  */
1925                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1926                         /*
1927                          * Create a new entry in the neighbor table.
1928                          */
1929                         ni = ieee80211_add_neighbor(vap, wh, &scan);
1930                 }
1931                 /*
1932                  * Automatically peer with discovered nodes if possible.
1933                  */
1934                 if (ni != vap->iv_bss &&
1935                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1936                         switch (ni->ni_mlstate) {
1937                         case IEEE80211_NODE_MESH_IDLE:
1938                         {
1939                                 uint16_t args[1];
1940
1941                                 /* Wait for backoff callout to reset counter */
1942                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1943                                         return;
1944
1945                                 ni->ni_mlpid = mesh_generateid(vap);
1946                                 if (ni->ni_mlpid == 0)
1947                                         return;
1948                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1949                                 args[0] = ni->ni_mlpid;
1950                                 ieee80211_send_action(ni,
1951                                 IEEE80211_ACTION_CAT_SELF_PROT,
1952                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1953                                 ni->ni_mlrcnt = 0;
1954                                 mesh_peer_timeout_setup(ni);
1955                                 break;
1956                         }
1957                         case IEEE80211_NODE_MESH_ESTABLISHED:
1958                         {
1959                                 /*
1960                                  * Valid beacon from a peer mesh STA
1961                                  * bump TA lifetime
1962                                  */
1963                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1964                                 if(rt != NULL) {
1965                                         ieee80211_mesh_rt_update(rt,
1966                                             ticks_to_msecs(
1967                                             ms->ms_ppath->mpp_inact));
1968                                 }
1969                                 break;
1970                         }
1971                         default:
1972                                 break; /* ignore */
1973                         }
1974                 }
1975                 break;
1976         }
1977         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1978         {
1979                 uint8_t *ssid, *meshid, *rates, *xrates;
1980
1981                 if (vap->iv_state != IEEE80211_S_RUN) {
1982                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1983                             wh, NULL, "wrong state %s",
1984                             ieee80211_state_name[vap->iv_state]);
1985                         vap->iv_stats.is_rx_mgtdiscard++;
1986                         return;
1987                 }
1988                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1989                         /* frame must be directed */
1990                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1991                             wh, NULL, "%s", "not unicast");
1992                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
1993                         return;
1994                 }
1995                 /*
1996                  * prreq frame format
1997                  *      [tlv] ssid
1998                  *      [tlv] supported rates
1999                  *      [tlv] extended supported rates
2000                  *      [tlv] mesh id
2001                  */
2002                 ssid = meshid = rates = xrates = NULL;
2003                 while (efrm - frm > 1) {
2004                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2005                         switch (*frm) {
2006                         case IEEE80211_ELEMID_SSID:
2007                                 ssid = frm;
2008                                 break;
2009                         case IEEE80211_ELEMID_RATES:
2010                                 rates = frm;
2011                                 break;
2012                         case IEEE80211_ELEMID_XRATES:
2013                                 xrates = frm;
2014                                 break;
2015                         case IEEE80211_ELEMID_MESHID:
2016                                 meshid = frm;
2017                                 break;
2018                         }
2019                         frm += frm[1] + 2;
2020                 }
2021                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2022                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2023                 if (xrates != NULL)
2024                         IEEE80211_VERIFY_ELEMENT(xrates,
2025                             IEEE80211_RATE_MAXSIZE - rates[1], return);
2026                 if (meshid != NULL) {
2027                         IEEE80211_VERIFY_ELEMENT(meshid,
2028                             IEEE80211_MESHID_LEN, return);
2029                         /* NB: meshid, not ssid */
2030                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2031                 }
2032
2033                 /* XXX find a better class or define it's own */
2034                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2035                     "%s", "recv probe req");
2036                 /*
2037                  * Some legacy 11b clients cannot hack a complete
2038                  * probe response frame.  When the request includes
2039                  * only a bare-bones rate set, communicate this to
2040                  * the transmit side.
2041                  */
2042                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2043                 break;
2044         }
2045
2046         case IEEE80211_FC0_SUBTYPE_ACTION:
2047         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2048                 if (ni == vap->iv_bss) {
2049                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2050                             wh, NULL, "%s", "unknown node");
2051                         vap->iv_stats.is_rx_mgtdiscard++;
2052                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2053                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2054                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2055                             wh, NULL, "%s", "not for us");
2056                         vap->iv_stats.is_rx_mgtdiscard++;
2057                 } else if (vap->iv_state != IEEE80211_S_RUN) {
2058                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2059                             wh, NULL, "wrong state %s",
2060                             ieee80211_state_name[vap->iv_state]);
2061                         vap->iv_stats.is_rx_mgtdiscard++;
2062                 } else {
2063                         if (ieee80211_parse_action(ni, m0) == 0)
2064                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2065                 }
2066                 break;
2067
2068         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2069         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2070         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2071         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2072         case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2073         case IEEE80211_FC0_SUBTYPE_ATIM:
2074         case IEEE80211_FC0_SUBTYPE_DISASSOC:
2075         case IEEE80211_FC0_SUBTYPE_AUTH:
2076         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2077                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2078                     wh, NULL, "%s", "not handled");
2079                 vap->iv_stats.is_rx_mgtdiscard++;
2080                 break;
2081
2082         default:
2083                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2084                     wh, "mgt", "subtype 0x%x not handled", subtype);
2085                 vap->iv_stats.is_rx_badsubtype++;
2086                 break;
2087         }
2088 }
2089
2090 static void
2091 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2092 {
2093
2094         switch (subtype) {
2095         case IEEE80211_FC0_SUBTYPE_BAR:
2096                 ieee80211_recv_bar(ni, m);
2097                 break;
2098         }
2099 }
2100
2101 /*
2102  * Parse meshpeering action ie's for MPM frames
2103  */
2104 static const struct ieee80211_meshpeer_ie *
2105 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2106         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
2107         const uint8_t *frm, const uint8_t *efrm,
2108         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2109 {
2110         struct ieee80211vap *vap = ni->ni_vap;
2111         const struct ieee80211_meshpeer_ie *mpie;
2112         uint16_t args[3];
2113         const uint8_t *meshid, *meshconf;
2114         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2115
2116         meshid = meshconf = NULL;
2117         while (efrm - frm > 1) {
2118                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2119                 switch (*frm) {
2120                 case IEEE80211_ELEMID_MESHID:
2121                         meshid = frm;
2122                         break;
2123                 case IEEE80211_ELEMID_MESHCONF:
2124                         meshconf = frm;
2125                         break;
2126                 case IEEE80211_ELEMID_MESHPEER:
2127                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
2128                         memset(mp, 0, sizeof(*mp));
2129                         mp->peer_len = mpie->peer_len;
2130                         mp->peer_proto = le16dec(&mpie->peer_proto);
2131                         mp->peer_llinkid = le16dec(&mpie->peer_llinkid);
2132                         switch (subtype) {
2133                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2134                                 mp->peer_linkid =
2135                                     le16dec(&mpie->peer_linkid);
2136                                 break;
2137                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
2138                                 /* NB: peer link ID is optional */
2139                                 if (mpie->peer_len ==
2140                                     (IEEE80211_MPM_BASE_SZ + 2)) {
2141                                         mp->peer_linkid = 0;
2142                                         mp->peer_rcode =
2143                                             le16dec(&mpie->peer_linkid);
2144                                 } else {
2145                                         mp->peer_linkid =
2146                                             le16dec(&mpie->peer_linkid);
2147                                         mp->peer_rcode =
2148                                             le16dec(&mpie->peer_rcode);
2149                                 }
2150                                 break;
2151                         }
2152                         break;
2153                 }
2154                 frm += frm[1] + 2;
2155         }
2156
2157         /*
2158          * Verify the contents of the frame.
2159          * If it fails validation, close the peer link.
2160          */
2161         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2162                 sendclose = 1;
2163                 IEEE80211_DISCARD(vap,
2164                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2165                     wh, NULL, "%s", "MPM validation failed");
2166         }
2167
2168         /* If meshid is not the same reject any frames type. */
2169         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2170                 sendclose = 1;
2171                 IEEE80211_DISCARD(vap,
2172                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2173                     wh, NULL, "%s", "not for our mesh");
2174                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2175                         /*
2176                          * Standard not clear about this, if we dont ignore
2177                          * there will be an endless loop between nodes sending
2178                          * CLOSE frames between each other with wrong meshid.
2179                          * Discard and timers will bring FSM to IDLE state.
2180                          */
2181                         return NULL;
2182                 }
2183         }
2184
2185         /*
2186          * Close frames are accepted if meshid is the same.
2187          * Verify the other two types.
2188          */
2189         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2190             mesh_verify_meshconf(vap, meshconf)) {
2191                 sendclose = 1;
2192                 IEEE80211_DISCARD(vap,
2193                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2194                     wh, NULL, "%s", "configuration mismatch");
2195         }
2196
2197         if (sendclose) {
2198                 vap->iv_stats.is_rx_mgtdiscard++;
2199                 switch (ni->ni_mlstate) {
2200                 case IEEE80211_NODE_MESH_IDLE:
2201                 case IEEE80211_NODE_MESH_ESTABLISHED:
2202                 case IEEE80211_NODE_MESH_HOLDING:
2203                         /* ignore */
2204                         break;
2205                 case IEEE80211_NODE_MESH_OPENSNT:
2206                 case IEEE80211_NODE_MESH_OPENRCV:
2207                 case IEEE80211_NODE_MESH_CONFIRMRCV:
2208                         args[0] = ni->ni_mlpid;
2209                         args[1] = ni->ni_mllid;
2210                         /* Reason codes for rejection */
2211                         switch (subtype) {
2212                         case IEEE80211_ACTION_MESHPEERING_OPEN:
2213                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2214                                 break;
2215                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2216                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2217                                 break;
2218                         }
2219                         ieee80211_send_action(ni,
2220                             IEEE80211_ACTION_CAT_SELF_PROT,
2221                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2222                             args);
2223                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2224                         mesh_peer_timeout_setup(ni);
2225                         break;
2226                 }
2227                 return NULL;
2228         }
2229
2230         return (const struct ieee80211_meshpeer_ie *) mp;
2231 }
2232
2233 static int
2234 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2235         const struct ieee80211_frame *wh,
2236         const uint8_t *frm, const uint8_t *efrm)
2237 {
2238         struct ieee80211vap *vap = ni->ni_vap;
2239         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2240         struct ieee80211_meshpeer_ie ie;
2241         const struct ieee80211_meshpeer_ie *meshpeer;
2242         uint16_t args[3];
2243
2244         /* +2+2 for action + code + capabilites */
2245         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2246             IEEE80211_ACTION_MESHPEERING_OPEN);
2247         if (meshpeer == NULL) {
2248                 return 0;
2249         }
2250
2251         /* XXX move up */
2252         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2253             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2254
2255         switch (ni->ni_mlstate) {
2256         case IEEE80211_NODE_MESH_IDLE:
2257                 /* Reject open request if reached our maximum neighbor count */
2258                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2259                         args[0] = meshpeer->peer_llinkid;
2260                         args[1] = 0;
2261                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2262                         ieee80211_send_action(ni,
2263                             IEEE80211_ACTION_CAT_SELF_PROT,
2264                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2265                             args);
2266                         /* stay in IDLE state */
2267                         return (0);
2268                 }
2269                 /* Open frame accepted */
2270                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2271                 ni->ni_mllid = meshpeer->peer_llinkid;
2272                 ni->ni_mlpid = mesh_generateid(vap);
2273                 if (ni->ni_mlpid == 0)
2274                         return 0;               /* XXX */
2275                 args[0] = ni->ni_mlpid;
2276                 /* Announce we're open too... */
2277                 ieee80211_send_action(ni,
2278                     IEEE80211_ACTION_CAT_SELF_PROT,
2279                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
2280                 /* ...and confirm the link. */
2281                 args[0] = ni->ni_mlpid;
2282                 args[1] = ni->ni_mllid;
2283                 ieee80211_send_action(ni,
2284                     IEEE80211_ACTION_CAT_SELF_PROT,
2285                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2286                     args);
2287                 mesh_peer_timeout_setup(ni);
2288                 break;
2289         case IEEE80211_NODE_MESH_OPENRCV:
2290                 /* Wrong Link ID */
2291                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2292                         args[0] = ni->ni_mllid;
2293                         args[1] = ni->ni_mlpid;
2294                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2295                         ieee80211_send_action(ni,
2296                             IEEE80211_ACTION_CAT_SELF_PROT,
2297                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2298                             args);
2299                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2300                         mesh_peer_timeout_setup(ni);
2301                         break;
2302                 }
2303                 /* Duplicate open, confirm again. */
2304                 args[0] = ni->ni_mlpid;
2305                 args[1] = ni->ni_mllid;
2306                 ieee80211_send_action(ni,
2307                     IEEE80211_ACTION_CAT_SELF_PROT,
2308                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2309                     args);
2310                 break;
2311         case IEEE80211_NODE_MESH_OPENSNT:
2312                 ni->ni_mllid = meshpeer->peer_llinkid;
2313                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2314                 args[0] = ni->ni_mlpid;
2315                 args[1] = ni->ni_mllid;
2316                 ieee80211_send_action(ni,
2317                     IEEE80211_ACTION_CAT_SELF_PROT,
2318                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2319                     args);
2320                 /* NB: don't setup/clear any timeout */
2321                 break;
2322         case IEEE80211_NODE_MESH_CONFIRMRCV:
2323                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2324                     ni->ni_mllid != meshpeer->peer_llinkid) {
2325                         args[0] = ni->ni_mlpid;
2326                         args[1] = ni->ni_mllid;
2327                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2328                         ieee80211_send_action(ni,
2329                             IEEE80211_ACTION_CAT_SELF_PROT,
2330                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2331                             args);
2332                         mesh_linkchange(ni,
2333                             IEEE80211_NODE_MESH_HOLDING);
2334                         mesh_peer_timeout_setup(ni);
2335                         break;
2336                 }
2337                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2338                 ni->ni_mllid = meshpeer->peer_llinkid;
2339                 args[0] = ni->ni_mlpid;
2340                 args[1] = ni->ni_mllid;
2341                 ieee80211_send_action(ni,
2342                     IEEE80211_ACTION_CAT_SELF_PROT,
2343                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2344                     args);
2345                 mesh_peer_timeout_stop(ni);
2346                 break;
2347         case IEEE80211_NODE_MESH_ESTABLISHED:
2348                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2349                         args[0] = ni->ni_mllid;
2350                         args[1] = ni->ni_mlpid;
2351                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2352                         ieee80211_send_action(ni,
2353                             IEEE80211_ACTION_CAT_SELF_PROT,
2354                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2355                             args);
2356                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2357                         mesh_peer_timeout_setup(ni);
2358                         break;
2359                 }
2360                 args[0] = ni->ni_mlpid;
2361                 args[1] = ni->ni_mllid;
2362                 ieee80211_send_action(ni,
2363                     IEEE80211_ACTION_CAT_SELF_PROT,
2364                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2365                     args);
2366                 break;
2367         case IEEE80211_NODE_MESH_HOLDING:
2368                 args[0] = ni->ni_mlpid;
2369                 args[1] = meshpeer->peer_llinkid;
2370                 /* Standard not clear about what the reaason code should be */
2371                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2372                 ieee80211_send_action(ni,
2373                     IEEE80211_ACTION_CAT_SELF_PROT,
2374                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2375                     args);
2376                 break;
2377         }
2378         return 0;
2379 }
2380
2381 static int
2382 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2383         const struct ieee80211_frame *wh,
2384         const uint8_t *frm, const uint8_t *efrm)
2385 {
2386         struct ieee80211vap *vap = ni->ni_vap;
2387         struct ieee80211_meshpeer_ie ie;
2388         const struct ieee80211_meshpeer_ie *meshpeer;
2389         uint16_t args[3];
2390
2391         /* +2+2+2+2 for action + code + capabilites + status code + AID */
2392         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2393             IEEE80211_ACTION_MESHPEERING_CONFIRM);
2394         if (meshpeer == NULL) {
2395                 return 0;
2396         }
2397
2398         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2399             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2400             meshpeer->peer_llinkid, meshpeer->peer_linkid);
2401
2402         switch (ni->ni_mlstate) {
2403         case IEEE80211_NODE_MESH_OPENRCV:
2404                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2405                 mesh_peer_timeout_stop(ni);
2406                 break;
2407         case IEEE80211_NODE_MESH_OPENSNT:
2408                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2409                 mesh_peer_timeout_setup(ni);
2410                 break;
2411         case IEEE80211_NODE_MESH_HOLDING:
2412                 args[0] = ni->ni_mlpid;
2413                 args[1] = meshpeer->peer_llinkid;
2414                 /* Standard not clear about what the reaason code should be */
2415                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2416                 ieee80211_send_action(ni,
2417                     IEEE80211_ACTION_CAT_SELF_PROT,
2418                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2419                     args);
2420                 break;
2421         case IEEE80211_NODE_MESH_CONFIRMRCV:
2422                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2423                         args[0] = ni->ni_mlpid;
2424                         args[1] = ni->ni_mllid;
2425                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2426                         ieee80211_send_action(ni,
2427                             IEEE80211_ACTION_CAT_SELF_PROT,
2428                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2429                             args);
2430                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2431                         mesh_peer_timeout_setup(ni);
2432                 }
2433                 break;
2434         default:
2435                 IEEE80211_DISCARD(vap,
2436                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2437                     wh, NULL, "received confirm in invalid state %d",
2438                     ni->ni_mlstate);
2439                 vap->iv_stats.is_rx_mgtdiscard++;
2440                 break;
2441         }
2442         return 0;
2443 }
2444
2445 static int
2446 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2447         const struct ieee80211_frame *wh,
2448         const uint8_t *frm, const uint8_t *efrm)
2449 {
2450         struct ieee80211_meshpeer_ie ie;
2451         const struct ieee80211_meshpeer_ie *meshpeer;
2452         uint16_t args[3];
2453
2454         /* +2 for action + code */
2455         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2456             IEEE80211_ACTION_MESHPEERING_CLOSE);
2457         if (meshpeer == NULL) {
2458                 return 0;
2459         }
2460
2461         /*
2462          * XXX: check reason code, for example we could receive
2463          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2464          * to peer again.
2465          */
2466
2467         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2468             ni, "%s", "recv PEER CLOSE");
2469
2470         switch (ni->ni_mlstate) {
2471         case IEEE80211_NODE_MESH_IDLE:
2472                 /* ignore */
2473                 break;
2474         case IEEE80211_NODE_MESH_OPENRCV:
2475         case IEEE80211_NODE_MESH_OPENSNT:
2476         case IEEE80211_NODE_MESH_CONFIRMRCV:
2477         case IEEE80211_NODE_MESH_ESTABLISHED:
2478                 args[0] = ni->ni_mlpid;
2479                 args[1] = ni->ni_mllid;
2480                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2481                 ieee80211_send_action(ni,
2482                     IEEE80211_ACTION_CAT_SELF_PROT,
2483                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2484                     args);
2485                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2486                 mesh_peer_timeout_setup(ni);
2487                 break;
2488         case IEEE80211_NODE_MESH_HOLDING:
2489                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2490                 mesh_peer_timeout_stop(ni);
2491                 break;
2492         }
2493         return 0;
2494 }
2495
2496 /*
2497  * Link Metric handling.
2498  */
2499 static int
2500 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2501         const struct ieee80211_frame *wh,
2502         const uint8_t *frm, const uint8_t *efrm)
2503 {
2504         const struct ieee80211_meshlmetric_ie *ie =
2505             (const struct ieee80211_meshlmetric_ie *)
2506             (frm+2); /* action + code */
2507         struct ieee80211_meshlmetric_ie lm_rep;
2508
2509         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2510                 lm_rep.lm_flags = 0;
2511                 lm_rep.lm_metric = mesh_airtime_calc(ni);
2512                 ieee80211_send_action(ni,
2513                     IEEE80211_ACTION_CAT_MESH,
2514                     IEEE80211_ACTION_MESH_LMETRIC,
2515                     &lm_rep);
2516         }
2517         /* XXX: else do nothing for now */
2518         return 0;
2519 }
2520
2521 /*
2522  * Parse meshgate action ie's for GANN frames.
2523  * Returns -1 if parsing fails, otherwise 0.
2524  */
2525 static int
2526 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2527     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
2528     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2529 {
2530         struct ieee80211vap *vap = ni->ni_vap;
2531         const struct ieee80211_meshgann_ie *gannie;
2532
2533         while (efrm - frm > 1) {
2534                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2535                 switch (*frm) {
2536                 case IEEE80211_ELEMID_MESHGANN:
2537                         gannie = (const struct ieee80211_meshgann_ie *) frm;
2538                         memset(ie, 0, sizeof(*ie));
2539                         ie->gann_ie = gannie->gann_ie;
2540                         ie->gann_len = gannie->gann_len;
2541                         ie->gann_flags = gannie->gann_flags;
2542                         ie->gann_hopcount = gannie->gann_hopcount;
2543                         ie->gann_ttl = gannie->gann_ttl;
2544                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2545                         ie->gann_seq = le32dec(&gannie->gann_seq);
2546                         ie->gann_interval = le16dec(&gannie->gann_interval);
2547                         break;
2548                 }
2549                 frm += frm[1] + 2;
2550         }
2551
2552         return 0;
2553 }
2554
2555 /*
2556  * Mesh Gate Announcement handling.
2557  */
2558 static int
2559 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2560         const struct ieee80211_frame *wh,
2561         const uint8_t *frm, const uint8_t *efrm)
2562 {
2563         struct ieee80211vap *vap = ni->ni_vap;
2564         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2565         struct ieee80211_mesh_gate_route *gr, *next;
2566         struct ieee80211_mesh_route *rt_gate;
2567         struct ieee80211_meshgann_ie pgann;
2568         struct ieee80211_meshgann_ie ie;
2569         int found = 0;
2570
2571         /* +2 for action + code */
2572         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2573                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2574                     ni->ni_macaddr, NULL, "%s",
2575                     "GANN parsing failed");
2576                 vap->iv_stats.is_rx_mgtdiscard++;
2577                 return (0);
2578         }
2579
2580         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2581                 return 0;
2582
2583         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2584             "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2585             ie.gann_seq);
2586
2587         if (ms == NULL)
2588                 return (0);
2589         MESH_RT_LOCK(ms);
2590         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2591                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2592                         continue;
2593                 if (ie.gann_seq <= gr->gr_lastseq) {
2594                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2595                             ni->ni_macaddr, NULL,
2596                             "GANN old seqno %u <= %u",
2597                             ie.gann_seq, gr->gr_lastseq);
2598                         MESH_RT_UNLOCK(ms);
2599                         return (0);
2600                 }
2601                 /* corresponding mesh gate found & GANN accepted */
2602                 found = 1;
2603                 break;
2604         }
2605         if (found == 0) {
2606                 /* this GANN is from a new mesh Gate add it to known table. */
2607                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2608                     "stored new GANN information, seq %u.", ie.gann_seq);
2609                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2610                     M_80211_MESH_GT_RT,
2611                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2612                 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2613                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2614         }
2615         gr->gr_lastseq = ie.gann_seq;
2616
2617         /* check if we have a path to this gate */
2618         rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2619         if (rt_gate != NULL &&
2620             rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2621                 gr->gr_route = rt_gate;
2622                 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2623         }
2624
2625         MESH_RT_UNLOCK(ms);
2626
2627         /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2628         if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2629                 return 0;
2630         pgann.gann_flags = ie.gann_flags; /* Reserved */
2631         pgann.gann_hopcount = ie.gann_hopcount + 1;
2632         pgann.gann_ttl = ie.gann_ttl - 1;
2633         IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2634         pgann.gann_seq = ie.gann_seq;
2635         pgann.gann_interval = ie.gann_interval;
2636
2637         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2638             "%s", "propagate GANN");
2639
2640         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2641             IEEE80211_ACTION_MESH_GANN, &pgann);
2642
2643         return 0;
2644 }
2645
2646 static int
2647 mesh_send_action(struct ieee80211_node *ni,
2648     const uint8_t sa[IEEE80211_ADDR_LEN],
2649     const uint8_t da[IEEE80211_ADDR_LEN],
2650     struct mbuf *m)
2651 {
2652         struct ieee80211vap *vap = ni->ni_vap;
2653         struct ieee80211com *ic = ni->ni_ic;
2654         struct ieee80211_bpf_params params;
2655         int ret;
2656
2657         KASSERT(ni != NULL, ("null node"));
2658
2659         if (vap->iv_state == IEEE80211_S_CAC) {
2660                 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2661                     "block %s frame in CAC state", "Mesh action");
2662                 vap->iv_stats.is_tx_badstate++;
2663                 ieee80211_free_node(ni);
2664                 m_freem(m);
2665                 return EIO;             /* XXX */
2666         }
2667
2668         M_PREPEND(m, sizeof(struct ieee80211_frame), IEEE80211_M_NOWAIT);
2669         if (m == NULL) {
2670                 ieee80211_free_node(ni);
2671                 return ENOMEM;
2672         }
2673
2674         IEEE80211_TX_LOCK(ic);
2675         ieee80211_send_setup(ni, m,
2676              IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2677              IEEE80211_NONQOS_TID, sa, da, sa);
2678         m->m_flags |= M_ENCAP;          /* mark encapsulated */
2679
2680         memset(&params, 0, sizeof(params));
2681         params.ibp_pri = WME_AC_VO;
2682         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2683         if (IEEE80211_IS_MULTICAST(da))
2684                 params.ibp_try0 = 1;
2685         else
2686                 params.ibp_try0 = ni->ni_txparms->maxretry;
2687         params.ibp_power = ni->ni_txpower;
2688
2689         IEEE80211_NODE_STAT(ni, tx_mgmt);
2690
2691         ret = ieee80211_raw_output(vap, ni, m, &params);
2692         IEEE80211_TX_UNLOCK(ic);
2693         return (ret);
2694 }
2695
2696 #define ADDSHORT(frm, v) do {                   \
2697         frm[0] = (v) & 0xff;                    \
2698         frm[1] = (v) >> 8;                      \
2699         frm += 2;                               \
2700 } while (0)
2701 #define ADDWORD(frm, v) do {                    \
2702         frm[0] = (v) & 0xff;                    \
2703         frm[1] = ((v) >> 8) & 0xff;             \
2704         frm[2] = ((v) >> 16) & 0xff;            \
2705         frm[3] = ((v) >> 24) & 0xff;            \
2706         frm += 4;                               \
2707 } while (0)
2708
2709 static int
2710 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2711         int category, int action, void *args0)
2712 {
2713         struct ieee80211vap *vap = ni->ni_vap;
2714         struct ieee80211com *ic = ni->ni_ic;
2715         uint16_t *args = args0;
2716         const struct ieee80211_rateset *rs;
2717         struct mbuf *m;
2718         uint8_t *frm;
2719
2720         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2721             "send PEER OPEN action: localid 0x%x", args[0]);
2722
2723         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2724             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2725             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2726         ieee80211_ref_node(ni);
2727
2728         m = ieee80211_getmgtframe(&frm,
2729             ic->ic_headroom + sizeof(struct ieee80211_frame),
2730             sizeof(uint16_t)    /* action+category */
2731             + sizeof(uint16_t)  /* capabilites */
2732             + 2 + IEEE80211_RATE_SIZE
2733             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2734             + 2 + IEEE80211_MESHID_LEN
2735             + sizeof(struct ieee80211_meshconf_ie)
2736             + sizeof(struct ieee80211_meshpeer_ie)
2737         );
2738         if (m != NULL) {
2739                 /*
2740                  * mesh peer open action frame format:
2741                  *   [1] category
2742                  *   [1] action
2743                  *   [2] capabilities
2744                  *   [tlv] rates
2745                  *   [tlv] xrates
2746                  *   [tlv] mesh id
2747                  *   [tlv] mesh conf
2748                  *   [tlv] mesh peer link mgmt
2749                  */
2750                 *frm++ = category;
2751                 *frm++ = action;
2752                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2753                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2754                 frm = ieee80211_add_rates(frm, rs);
2755                 frm = ieee80211_add_xrates(frm, rs);
2756                 frm = ieee80211_add_meshid(frm, vap);
2757                 frm = ieee80211_add_meshconf(frm, vap);
2758                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2759                     args[0], 0, 0);
2760                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2761                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2762         } else {
2763                 vap->iv_stats.is_tx_nobuf++;
2764                 ieee80211_free_node(ni);
2765                 return ENOMEM;
2766         }
2767 }
2768
2769 static int
2770 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2771         int category, int action, void *args0)
2772 {
2773         struct ieee80211vap *vap = ni->ni_vap;
2774         struct ieee80211com *ic = ni->ni_ic;
2775         uint16_t *args = args0;
2776         const struct ieee80211_rateset *rs;
2777         struct mbuf *m;
2778         uint8_t *frm;
2779
2780         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2781             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2782             args[0], args[1]);
2783
2784         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2785             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2786             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2787         ieee80211_ref_node(ni);
2788
2789         m = ieee80211_getmgtframe(&frm,
2790             ic->ic_headroom + sizeof(struct ieee80211_frame),
2791             sizeof(uint16_t)    /* action+category */
2792             + sizeof(uint16_t)  /* capabilites */
2793             + sizeof(uint16_t)  /* status code */
2794             + sizeof(uint16_t)  /* AID */
2795             + 2 + IEEE80211_RATE_SIZE
2796             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2797             + 2 + IEEE80211_MESHID_LEN
2798             + sizeof(struct ieee80211_meshconf_ie)
2799             + sizeof(struct ieee80211_meshpeer_ie)
2800         );
2801         if (m != NULL) {
2802                 /*
2803                  * mesh peer confirm action frame format:
2804                  *   [1] category
2805                  *   [1] action
2806                  *   [2] capabilities
2807                  *   [2] status code
2808                  *   [2] association id (peer ID)
2809                  *   [tlv] rates
2810                  *   [tlv] xrates
2811                  *   [tlv] mesh id
2812                  *   [tlv] mesh conf
2813                  *   [tlv] mesh peer link mgmt
2814                  */
2815                 *frm++ = category;
2816                 *frm++ = action;
2817                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2818                 ADDSHORT(frm, 0);               /* status code */
2819                 ADDSHORT(frm, args[1]);         /* AID */
2820                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2821                 frm = ieee80211_add_rates(frm, rs);
2822                 frm = ieee80211_add_xrates(frm, rs);
2823                 frm = ieee80211_add_meshid(frm, vap);
2824                 frm = ieee80211_add_meshconf(frm, vap);
2825                 frm = ieee80211_add_meshpeer(frm,
2826                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2827                     args[0], args[1], 0);
2828                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2829                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2830         } else {
2831                 vap->iv_stats.is_tx_nobuf++;
2832                 ieee80211_free_node(ni);
2833                 return ENOMEM;
2834         }
2835 }
2836
2837 static int
2838 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2839         int category, int action, void *args0)
2840 {
2841         struct ieee80211vap *vap = ni->ni_vap;
2842         struct ieee80211com *ic = ni->ni_ic;
2843         uint16_t *args = args0;
2844         struct mbuf *m;
2845         uint8_t *frm;
2846
2847         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2848             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)",
2849             args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
2850
2851         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2852             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2853             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2854         ieee80211_ref_node(ni);
2855
2856         m = ieee80211_getmgtframe(&frm,
2857             ic->ic_headroom + sizeof(struct ieee80211_frame),
2858             sizeof(uint16_t)    /* action+category */
2859             + sizeof(uint16_t)  /* reason code */
2860             + 2 + IEEE80211_MESHID_LEN
2861             + sizeof(struct ieee80211_meshpeer_ie)
2862         );
2863         if (m != NULL) {
2864                 /*
2865                  * mesh peer close action frame format:
2866                  *   [1] category
2867                  *   [1] action
2868                  *   [tlv] mesh id
2869                  *   [tlv] mesh peer link mgmt
2870                  */
2871                 *frm++ = category;
2872                 *frm++ = action;
2873                 frm = ieee80211_add_meshid(frm, vap);
2874                 frm = ieee80211_add_meshpeer(frm,
2875                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2876                     args[0], args[1], args[2]);
2877                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2878                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2879         } else {
2880                 vap->iv_stats.is_tx_nobuf++;
2881                 ieee80211_free_node(ni);
2882                 return ENOMEM;
2883         }
2884 }
2885
2886 static int
2887 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2888         int category, int action, void *arg0)
2889 {
2890         struct ieee80211vap *vap = ni->ni_vap;
2891         struct ieee80211com *ic = ni->ni_ic;
2892         struct ieee80211_meshlmetric_ie *ie = arg0;
2893         struct mbuf *m;
2894         uint8_t *frm;
2895
2896         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2897                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2898                     ni, "%s", "send LINK METRIC REQUEST action");
2899         } else {
2900                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2901                     ni, "send LINK METRIC REPLY action: metric 0x%x",
2902                     ie->lm_metric);
2903         }
2904         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2905             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2906             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2907         ieee80211_ref_node(ni);
2908
2909         m = ieee80211_getmgtframe(&frm,
2910             ic->ic_headroom + sizeof(struct ieee80211_frame),
2911             sizeof(uint16_t) +  /* action+category */
2912             sizeof(struct ieee80211_meshlmetric_ie)
2913         );
2914         if (m != NULL) {
2915                 /*
2916                  * mesh link metric
2917                  *   [1] category
2918                  *   [1] action
2919                  *   [tlv] mesh link metric
2920                  */
2921                 *frm++ = category;
2922                 *frm++ = action;
2923                 frm = ieee80211_add_meshlmetric(frm,
2924                     ie->lm_flags, ie->lm_metric);
2925                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2926                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2927         } else {
2928                 vap->iv_stats.is_tx_nobuf++;
2929                 ieee80211_free_node(ni);
2930                 return ENOMEM;
2931         }
2932 }
2933
2934 static int
2935 mesh_send_action_meshgate(struct ieee80211_node *ni,
2936         int category, int action, void *arg0)
2937 {
2938         struct ieee80211vap *vap = ni->ni_vap;
2939         struct ieee80211com *ic = ni->ni_ic;
2940         struct ieee80211_meshgann_ie *ie = arg0;
2941         struct mbuf *m;
2942         uint8_t *frm;
2943
2944         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2945             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2946             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2947         ieee80211_ref_node(ni);
2948
2949         m = ieee80211_getmgtframe(&frm,
2950             ic->ic_headroom + sizeof(struct ieee80211_frame),
2951             sizeof(uint16_t) +  /* action+category */
2952             IEEE80211_MESHGANN_BASE_SZ
2953         );
2954         if (m != NULL) {
2955                 /*
2956                  * mesh link metric
2957                  *   [1] category
2958                  *   [1] action
2959                  *   [tlv] mesh gate announcement
2960                  */
2961                 *frm++ = category;
2962                 *frm++ = action;
2963                 frm = ieee80211_add_meshgate(frm, ie);
2964                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2965                 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2966         } else {
2967                 vap->iv_stats.is_tx_nobuf++;
2968                 ieee80211_free_node(ni);
2969                 return ENOMEM;
2970         }
2971 }
2972
2973 static void
2974 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2975 {
2976         switch (ni->ni_mlstate) {
2977         case IEEE80211_NODE_MESH_HOLDING:
2978                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2979                 break;
2980         case IEEE80211_NODE_MESH_CONFIRMRCV:
2981                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2982                 break;
2983         case IEEE80211_NODE_MESH_IDLE:
2984                 ni->ni_mltval = 0;
2985                 break;
2986         default:
2987                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
2988                 break;
2989         }
2990         if (ni->ni_mltval)
2991                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2992                     mesh_peer_timeout_cb, ni);
2993 }
2994
2995 /*
2996  * Same as above but backoffs timer statisically 50%.
2997  */
2998 static void
2999 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3000 {
3001         uint32_t r;
3002
3003         r = arc4random();
3004         ni->ni_mltval += r % ni->ni_mltval;
3005         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3006             ni);
3007 }
3008
3009 static __inline void
3010 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3011 {
3012         callout_drain(&ni->ni_mltimer);
3013 }
3014
3015 static void
3016 mesh_peer_backoff_cb(void *arg)
3017 {
3018         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3019
3020         /* After backoff timeout, try to peer automatically again. */
3021         ni->ni_mlhcnt = 0;
3022 }
3023
3024 /*
3025  * Mesh Peer Link Management FSM timeout handling.
3026  */
3027 static void
3028 mesh_peer_timeout_cb(void *arg)
3029 {
3030         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3031         uint16_t args[3];
3032
3033         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3034             ni, "mesh link timeout, state %d, retry counter %d",
3035             ni->ni_mlstate, ni->ni_mlrcnt);
3036
3037         switch (ni->ni_mlstate) {
3038         case IEEE80211_NODE_MESH_IDLE:
3039         case IEEE80211_NODE_MESH_ESTABLISHED:
3040                 break;
3041         case IEEE80211_NODE_MESH_OPENSNT:
3042         case IEEE80211_NODE_MESH_OPENRCV:
3043                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3044                         args[0] = ni->ni_mlpid;
3045                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3046                         ieee80211_send_action(ni,
3047                             IEEE80211_ACTION_CAT_SELF_PROT,
3048                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3049                         ni->ni_mlrcnt = 0;
3050                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3051                         mesh_peer_timeout_setup(ni);
3052                 } else {
3053                         args[0] = ni->ni_mlpid;
3054                         ieee80211_send_action(ni,
3055                             IEEE80211_ACTION_CAT_SELF_PROT,
3056                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
3057                         ni->ni_mlrcnt++;
3058                         mesh_peer_timeout_backoff(ni);
3059                 }
3060                 break;
3061         case IEEE80211_NODE_MESH_CONFIRMRCV:
3062                 args[0] = ni->ni_mlpid;
3063                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3064                 ieee80211_send_action(ni,
3065                     IEEE80211_ACTION_CAT_SELF_PROT,
3066                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3067                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3068                 mesh_peer_timeout_setup(ni);
3069                 break;
3070         case IEEE80211_NODE_MESH_HOLDING:
3071                 ni->ni_mlhcnt++;
3072                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3073                         callout_reset(&ni->ni_mlhtimer,
3074                             ieee80211_mesh_backofftimeout,
3075                             mesh_peer_backoff_cb, ni);
3076                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3077                 break;
3078         }
3079 }
3080
3081 static int
3082 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3083 {
3084         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3085
3086         if (ie == NULL || ie[1] != ms->ms_idlen)
3087                 return 1;
3088         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3089 }
3090
3091 /*
3092  * Check if we are using the same algorithms for this mesh.
3093  */
3094 static int
3095 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3096 {
3097         const struct ieee80211_meshconf_ie *meshconf =
3098             (const struct ieee80211_meshconf_ie *) ie;
3099         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3100
3101         if (meshconf == NULL)
3102                 return 1;
3103         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3104                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3105                     "unknown path selection algorithm: 0x%x\n",
3106                     meshconf->conf_pselid);
3107                 return 1;
3108         }
3109         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3110                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3111                     "unknown path metric algorithm: 0x%x\n",
3112                     meshconf->conf_pmetid);
3113                 return 1;
3114         }
3115         if (meshconf->conf_ccid != 0) {
3116                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3117                     "unknown congestion control algorithm: 0x%x\n",
3118                     meshconf->conf_ccid);
3119                 return 1;
3120         }
3121         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3122                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3123                     "unknown sync algorithm: 0x%x\n",
3124                     meshconf->conf_syncid);
3125                 return 1;
3126         }
3127         if (meshconf->conf_authid != 0) {
3128                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3129                     "unknown auth auth algorithm: 0x%x\n",
3130                     meshconf->conf_pselid);
3131                 return 1;
3132         }
3133         /* Not accepting peers */
3134         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3135                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3136                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
3137                 return 1;
3138         }
3139         return 0;
3140 }
3141
3142 static int
3143 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3144     const uint8_t *ie)
3145 {
3146         const struct ieee80211_meshpeer_ie *meshpeer =
3147             (const struct ieee80211_meshpeer_ie *) ie;
3148
3149         if (meshpeer == NULL ||
3150             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3151             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3152                 return 1;
3153         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3154                 IEEE80211_DPRINTF(vap,
3155                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3156                     "Only MPM protocol is supported (proto: 0x%02X)",
3157                     meshpeer->peer_proto);
3158                 return 1;
3159         }
3160         switch (subtype) {
3161         case IEEE80211_ACTION_MESHPEERING_OPEN:
3162                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3163                         return 1;
3164                 break;
3165         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3166                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3167                         return 1;
3168                 break;
3169         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3170                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3171                         return 1;
3172                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3173                     meshpeer->peer_linkid != 0)
3174                         return 1;
3175                 if (meshpeer->peer_rcode == 0)
3176                         return 1;
3177                 break;
3178         }
3179         return 0;
3180 }
3181
3182 /*
3183  * Add a Mesh ID IE to a frame.
3184  */
3185 uint8_t *
3186 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3187 {
3188         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3189
3190         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3191
3192         *frm++ = IEEE80211_ELEMID_MESHID;
3193         *frm++ = ms->ms_idlen;
3194         memcpy(frm, ms->ms_id, ms->ms_idlen);
3195         return frm + ms->ms_idlen;
3196 }
3197
3198 /*
3199  * Add a Mesh Configuration IE to a frame.
3200  * For now just use HWMP routing, Airtime link metric, Null Congestion
3201  * Signaling, Null Sync Protocol and Null Authentication.
3202  */
3203 uint8_t *
3204 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3205 {
3206         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3207         uint16_t caps;
3208
3209         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3210
3211         *frm++ = IEEE80211_ELEMID_MESHCONF;
3212         *frm++ = IEEE80211_MESH_CONF_SZ;
3213         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
3214         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
3215         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3216         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3217         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3218         /* NB: set the number of neighbors before the rest */
3219         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3220             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3221         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3222                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3223         frm += 1;
3224         caps = 0;
3225         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3226                 caps |= IEEE80211_MESHCONF_CAP_AP;
3227         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3228                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3229         *frm++ = caps;
3230         return frm;
3231 }
3232
3233 /*
3234  * Add a Mesh Peer Management IE to a frame.
3235  */
3236 uint8_t *
3237 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3238     uint16_t peerid, uint16_t reason)
3239 {
3240
3241         KASSERT(localid != 0, ("localid == 0"));
3242
3243         *frm++ = IEEE80211_ELEMID_MESHPEER;
3244         switch (subtype) {
3245         case IEEE80211_ACTION_MESHPEERING_OPEN:
3246                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
3247                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3248                 ADDSHORT(frm, localid);                 /* local ID */
3249                 break;
3250         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3251                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3252                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
3253                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3254                 ADDSHORT(frm, localid);                 /* local ID */
3255                 ADDSHORT(frm, peerid);                  /* peer ID */
3256                 break;
3257         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3258                 if (peerid)
3259                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
3260                 else
3261                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3262                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3263                 ADDSHORT(frm, localid); /* local ID */
3264                 if (peerid)
3265                         ADDSHORT(frm, peerid);  /* peer ID */
3266                 ADDSHORT(frm, reason);
3267                 break;
3268         }
3269         return frm;
3270 }
3271
3272 /*
3273  * Compute an Airtime Link Metric for the link with this node.
3274  *
3275  * Based on Draft 3.0 spec (11B.10, p.149).
3276  */
3277 /*
3278  * Max 802.11s overhead.
3279  */
3280 #define IEEE80211_MESH_MAXOVERHEAD \
3281         (sizeof(struct ieee80211_qosframe_addr4) \
3282          + sizeof(struct ieee80211_meshcntl_ae10) \
3283         + sizeof(struct llc) \
3284         + IEEE80211_ADDR_LEN \
3285         + IEEE80211_WEP_IVLEN \
3286         + IEEE80211_WEP_KIDLEN \
3287         + IEEE80211_WEP_CRCLEN \
3288         + IEEE80211_WEP_MICLEN \
3289         + IEEE80211_CRC_LEN)
3290 uint32_t
3291 mesh_airtime_calc(struct ieee80211_node *ni)
3292 {
3293 #define M_BITS 8
3294 #define S_FACTOR (2 * M_BITS)
3295         struct ieee80211com *ic = ni->ni_ic;
3296         struct ifnet *ifp = ni->ni_vap->iv_ifp;
3297         const static int nbits = 8192 << M_BITS;
3298         uint32_t overhead, rate, errrate;
3299         uint64_t res;
3300
3301         /* Time to transmit a frame */
3302         rate = ni->ni_txrate;
3303         overhead = ieee80211_compute_duration(ic->ic_rt,
3304             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3305         /* Error rate in percentage */
3306         /* XXX assuming small failures are ok */
3307         errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
3308             ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
3309             / 100;
3310         res = (overhead + (nbits / rate)) *
3311             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3312
3313         return (uint32_t)(res >> S_FACTOR);
3314 #undef M_BITS
3315 #undef S_FACTOR
3316 }
3317
3318 /*
3319  * Add a Mesh Link Metric report IE to a frame.
3320  */
3321 uint8_t *
3322 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3323 {
3324         *frm++ = IEEE80211_ELEMID_MESHLINK;
3325         *frm++ = 5;
3326         *frm++ = flags;
3327         ADDWORD(frm, metric);
3328         return frm;
3329 }
3330
3331 /*
3332  * Add a Mesh Gate Announcement IE to a frame.
3333  */
3334 uint8_t *
3335 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3336 {
3337         *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3338         *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3339         *frm++ = ie->gann_flags;
3340         *frm++ = ie->gann_hopcount;
3341         *frm++ = ie->gann_ttl;
3342         IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3343         frm += 6;
3344         ADDWORD(frm, ie->gann_seq);
3345         ADDSHORT(frm, ie->gann_interval);
3346         return frm;
3347 }
3348 #undef ADDSHORT
3349 #undef ADDWORD
3350
3351 /*
3352  * Initialize any mesh-specific node state.
3353  */
3354 void
3355 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3356 {
3357         ni->ni_flags |= IEEE80211_NODE_QOS;
3358         callout_init(&ni->ni_mltimer, 1);
3359         callout_init(&ni->ni_mlhtimer, 1);
3360 }
3361
3362 /*
3363  * Cleanup any mesh-specific node state.
3364  */
3365 void
3366 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3367 {
3368         struct ieee80211vap *vap = ni->ni_vap;
3369         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3370
3371         callout_drain(&ni->ni_mltimer);
3372         callout_drain(&ni->ni_mlhtimer);
3373         /* NB: short-circuit callbacks after mesh_vdetach */
3374         if (vap->iv_mesh != NULL)
3375                 ms->ms_ppath->mpp_peerdown(ni);
3376 }
3377
3378 void
3379 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3380 {
3381         ni->ni_meshidlen = ie[1];
3382         memcpy(ni->ni_meshid, ie + 2, ie[1]);
3383 }
3384
3385 /*
3386  * Setup mesh-specific node state on neighbor discovery.
3387  */
3388 void
3389 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3390         const struct ieee80211_frame *wh,
3391         const struct ieee80211_scanparams *sp)
3392 {
3393         ieee80211_parse_meshid(ni, sp->meshid);
3394 }
3395
3396 void
3397 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3398         struct ieee80211_beacon_offsets *bo)
3399 {
3400         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3401
3402         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3403                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3404                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3405         }
3406 }
3407
3408 static int
3409 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3410 {
3411         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3412         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3413         struct ieee80211_mesh_route *rt;
3414         struct ieee80211req_mesh_route *imr;
3415         size_t len, off;
3416         uint8_t *p;
3417         int error;
3418
3419         if (vap->iv_opmode != IEEE80211_M_MBSS)
3420                 return ENOSYS;
3421
3422         error = 0;
3423         switch (ireq->i_type) {
3424         case IEEE80211_IOC_MESH_ID:
3425                 ireq->i_len = ms->ms_idlen;
3426                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3427                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3428                 break;
3429         case IEEE80211_IOC_MESH_AP:
3430                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3431                 break;
3432         case IEEE80211_IOC_MESH_FWRD:
3433                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3434                 break;
3435         case IEEE80211_IOC_MESH_GATE:
3436                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3437                 break;
3438         case IEEE80211_IOC_MESH_TTL:
3439                 ireq->i_val = ms->ms_ttl;
3440                 break;
3441         case IEEE80211_IOC_MESH_RTCMD:
3442                 switch (ireq->i_val) {
3443                 case IEEE80211_MESH_RTCMD_LIST:
3444                         len = 0;
3445                         MESH_RT_LOCK(ms);
3446                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3447                                 len += sizeof(*imr);
3448                         }
3449                         MESH_RT_UNLOCK(ms);
3450                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3451                                 ireq->i_len = len;
3452                                 return ENOMEM;
3453                         }
3454                         ireq->i_len = len;
3455                         /* XXX M_WAIT? */
3456                         p = IEEE80211_MALLOC(len, M_TEMP,
3457                             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
3458                         if (p == NULL)
3459                                 return ENOMEM;
3460                         off = 0;
3461                         MESH_RT_LOCK(ms);
3462                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3463                                 if (off >= len)
3464                                         break;
3465                                 imr = (struct ieee80211req_mesh_route *)
3466                                     (p + off);
3467                                 IEEE80211_ADDR_COPY(imr->imr_dest,
3468                                     rt->rt_dest);
3469                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3470                                     rt->rt_nexthop);
3471                                 imr->imr_metric = rt->rt_metric;
3472                                 imr->imr_nhops = rt->rt_nhops;
3473                                 imr->imr_lifetime =
3474                                     ieee80211_mesh_rt_update(rt, 0);
3475                                 imr->imr_lastmseq = rt->rt_lastmseq;
3476                                 imr->imr_flags = rt->rt_flags; /* last */
3477                                 off += sizeof(*imr);
3478                         }
3479                         MESH_RT_UNLOCK(ms);
3480                         error = copyout(p, (uint8_t *)ireq->i_data,
3481                             ireq->i_len);
3482                         IEEE80211_FREE(p, M_TEMP);
3483                         break;
3484                 case IEEE80211_MESH_RTCMD_FLUSH:
3485                 case IEEE80211_MESH_RTCMD_ADD:
3486                 case IEEE80211_MESH_RTCMD_DELETE:
3487                         return EINVAL;
3488                 default:
3489                         return ENOSYS;
3490                 }
3491                 break;
3492         case IEEE80211_IOC_MESH_PR_METRIC:
3493                 len = strlen(ms->ms_pmetric->mpm_descr);
3494                 if (ireq->i_len < len)
3495                         return EINVAL;
3496                 ireq->i_len = len;
3497                 error = copyout(ms->ms_pmetric->mpm_descr,
3498                     (uint8_t *)ireq->i_data, len);
3499                 break;
3500         case IEEE80211_IOC_MESH_PR_PATH:
3501                 len = strlen(ms->ms_ppath->mpp_descr);
3502                 if (ireq->i_len < len)
3503                         return EINVAL;
3504                 ireq->i_len = len;
3505                 error = copyout(ms->ms_ppath->mpp_descr,
3506                     (uint8_t *)ireq->i_data, len);
3507                 break;
3508         default:
3509                 return ENOSYS;
3510         }
3511
3512         return error;
3513 }
3514 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3515
3516 static int
3517 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3518 {
3519         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3520         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3521         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3522         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3523         int error;
3524
3525         if (vap->iv_opmode != IEEE80211_M_MBSS)
3526                 return ENOSYS;
3527
3528         error = 0;
3529         switch (ireq->i_type) {
3530         case IEEE80211_IOC_MESH_ID:
3531                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3532                         return EINVAL;
3533                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3534                 if (error != 0)
3535                         break;
3536                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3537                 ms->ms_idlen = ireq->i_len;
3538                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3539                 error = ENETRESET;
3540                 break;
3541         case IEEE80211_IOC_MESH_AP:
3542                 if (ireq->i_val)
3543                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3544                 else
3545                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3546                 error = ENETRESET;
3547                 break;
3548         case IEEE80211_IOC_MESH_FWRD:
3549                 if (ireq->i_val)
3550                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3551                 else
3552                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3553                 mesh_gatemode_setup(vap);
3554                 break;
3555         case IEEE80211_IOC_MESH_GATE:
3556                 if (ireq->i_val)
3557                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3558                 else
3559                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3560                 break;
3561         case IEEE80211_IOC_MESH_TTL:
3562                 ms->ms_ttl = (uint8_t) ireq->i_val;
3563                 break;
3564         case IEEE80211_IOC_MESH_RTCMD:
3565                 switch (ireq->i_val) {
3566                 case IEEE80211_MESH_RTCMD_LIST:
3567                         return EINVAL;
3568                 case IEEE80211_MESH_RTCMD_FLUSH:
3569                         ieee80211_mesh_rt_flush(vap);
3570                         break;
3571                 case IEEE80211_MESH_RTCMD_ADD:
3572                         error = copyin(ireq->i_data, tmpaddr,
3573                             IEEE80211_ADDR_LEN);
3574                         if (error != 0)
3575                                 break;
3576                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, tmpaddr) ||
3577                             IEEE80211_ADDR_EQ(broadcastaddr, tmpaddr))
3578                                 return EINVAL;
3579                         ieee80211_mesh_discover(vap, tmpaddr, NULL);
3580                         break;
3581                 case IEEE80211_MESH_RTCMD_DELETE:
3582                         error = copyin(ireq->i_data, tmpaddr,
3583                             IEEE80211_ADDR_LEN);
3584                         if (error != 0)
3585                                 break;
3586                         ieee80211_mesh_rt_del(vap, tmpaddr);
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);