sys/net80211/ieee80211_mesh.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2009 The FreeBSD Foundation
   5  * All rights reserved.
   6  *
   7  * This software was developed by Rui Paulo under sponsorship from the
   8  * FreeBSD Foundation.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31 #include <sys/cdefs.h>
  32 #ifdef __FreeBSD__
  33 __FBSDID("$FreeBSD$");
  34 #endif
  35
  36 /*
  37  * IEEE 802.11s Mesh Point (MBSS) support.
  38  *
  39  * Based on March 2009, D3.0 802.11s draft spec.
  40  */
  41 #include "opt_inet.h"
  42 #include "opt_wlan.h"
  43
  44 #include <sys/param.h>
  45 #include <sys/systm.h>
  46 #include <sys/mbuf.h>
  47 #include <sys/malloc.h>
  48 #include <sys/kernel.h>
  49
  50 #include <sys/socket.h>
  51 #include <sys/sockio.h>
  52 #include <sys/endian.h>
  53 #include <sys/errno.h>
  54 #include <sys/proc.h>
  55 #include <sys/sysctl.h>
  56
  57 #include <net/bpf.h>
  58 #include <net/if.h>
  59 #include <net/if_var.h>
  60 #include <net/if_media.h>
  61 #include <net/if_llc.h>
  62 #include <net/ethernet.h>
  63
  64 #include <net80211/ieee80211_var.h>
  65 #include <net80211/ieee80211_action.h>
  66 #ifdef IEEE80211_SUPPORT_SUPERG
  67 #include <net80211/ieee80211_superg.h>
  68 #endif
  69 #include <net80211/ieee80211_input.h>
  70 #include <net80211/ieee80211_mesh.h>
  71
  72 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
  73 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
  74 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
  75 static void     mesh_vattach(struct ieee80211vap *);
  76 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  77 static void     mesh_rt_cleanup_cb(void *);
  78 static void     mesh_gatemode_setup(struct ieee80211vap *);
  79 static void     mesh_gatemode_cb(void *);
  80 static void     mesh_linkchange(struct ieee80211_node *,
  81                     enum ieee80211_mesh_mlstate);
  82 static void     mesh_checkid(void *, struct ieee80211_node *);
  83 static uint32_t mesh_generateid(struct ieee80211vap *);
  84 static int      mesh_checkpseq(struct ieee80211vap *,
  85                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
  86 static void     mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
  87                     struct ieee80211_mesh_route *);
  88 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
  89                     const struct ieee80211_meshcntl *);
  90 static int      mesh_input(struct ieee80211_node *, struct mbuf *,
  91                     const struct ieee80211_rx_stats *rxs, int, int);
  92 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
  93                     const struct ieee80211_rx_stats *rxs, int, int);
  94 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  95 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
  96 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
  97 static void     mesh_peer_timeout_cb(void *);
  98 static __inline void
  99                 mesh_peer_timeout_stop(struct ieee80211_node *);
 100 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
 101 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
 102 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
 103                     const uint8_t *);
 104 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
 105
 106 /*
 107  * Timeout values come from the specification and are in milliseconds.
 108  */
 109 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
 110     "IEEE 802.11s parameters");
 111 static int      ieee80211_mesh_gateint = -1;
 112 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint,
 113     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 114     &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
 115     "mesh gate interval (ms)");
 116 static int ieee80211_mesh_retrytimeout = -1;
 117 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout,
 118     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 119     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 120     "Retry timeout (msec)");
 121 static int ieee80211_mesh_holdingtimeout = -1;
 122
 123 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout,
 124     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 125     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 126     "Holding state timeout (msec)");
 127 static int ieee80211_mesh_confirmtimeout = -1;
 128 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout,
 129     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 130     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 131     "Confirm state timeout (msec)");
 132 static int ieee80211_mesh_backofftimeout = -1;
 133 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout,
 134     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 135     &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 136     "Backoff timeout (msec). This is to throutles peering forever when "
 137     "not receiving answer or is rejected by a neighbor");
 138 static int ieee80211_mesh_maxretries = 2;
 139 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW,
 140     &ieee80211_mesh_maxretries, 0,
 141     "Maximum retries during peer link establishment");
 142 static int ieee80211_mesh_maxholding = 2;
 143 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW,
 144     &ieee80211_mesh_maxholding, 0,
 145     "Maximum times we are allowed to transition to HOLDING state before "
 146     "backinoff during peer link establishment");
 147
 148 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
 149         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 150
 151 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
 152 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
 153 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
 154 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
 155 static  ieee80211_recv_action_func mesh_recv_action_meshgate;
 156
 157 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
 158 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
 159 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
 160 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
 161 static  ieee80211_send_action_func mesh_send_action_meshgate;
 162
 163 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
 164         .mpm_descr      = "AIRTIME",
 165         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
 166         .mpm_metric     = mesh_airtime_calc,
 167 };
 168
 169 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
 170 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
 171
 172 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
 173 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
 174 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
 175
 176 /* The longer one of the lifetime should be stored as new lifetime */
 177 #define MESH_ROUTE_LIFETIME_MAX(a, b)   (a > b ? a : b)
 178
 179 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
 180 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
 181
 182 /*
 183  * Helper functions to manipulate the Mesh routing table.
 184  */
 185
 186 static struct ieee80211_mesh_route *
 187 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
 188     const uint8_t dest[IEEE80211_ADDR_LEN])
 189 {
 190         struct ieee80211_mesh_route *rt;
 191
 192         MESH_RT_LOCK_ASSERT(ms);
 193
 194         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 195                 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
 196                         return rt;
 197         }
 198         return NULL;
 199 }
 200
 201 static struct ieee80211_mesh_route *
 202 mesh_rt_add_locked(struct ieee80211vap *vap,
 203     const uint8_t dest[IEEE80211_ADDR_LEN])
 204 {
 205         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 206         struct ieee80211_mesh_route *rt;
 207
 208         KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
 209             ("%s: adding broadcast to the routing table", __func__));
 210
 211         MESH_RT_LOCK_ASSERT(ms);
 212
 213         rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) +
 214             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT,
 215             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 216         if (rt != NULL) {
 217                 rt->rt_vap = vap;
 218                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
 219                 rt->rt_priv = (void *)ALIGN(&rt[1]);
 220                 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT");
 221                 callout_init(&rt->rt_discovery, 1);
 222                 rt->rt_updtime = ticks; /* create time */
 223                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
 224         }
 225         return rt;
 226 }
 227
 228 struct ieee80211_mesh_route *
 229 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
 230     const uint8_t dest[IEEE80211_ADDR_LEN])
 231 {
 232         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 233         struct ieee80211_mesh_route *rt;
 234
 235         MESH_RT_LOCK(ms);
 236         rt = mesh_rt_find_locked(ms, dest);
 237         MESH_RT_UNLOCK(ms);
 238         return rt;
 239 }
 240
 241 struct ieee80211_mesh_route *
 242 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
 243     const uint8_t dest[IEEE80211_ADDR_LEN])
 244 {
 245         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 246         struct ieee80211_mesh_route *rt;
 247
 248         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
 249             ("%s: duplicate entry in the routing table", __func__));
 250         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
 251             ("%s: adding self to the routing table", __func__));
 252
 253         MESH_RT_LOCK(ms);
 254         rt = mesh_rt_add_locked(vap, dest);
 255         MESH_RT_UNLOCK(ms);
 256         return rt;
 257 }
 258
 259 /*
 260  * Update the route lifetime and returns the updated lifetime.
 261  * If new_lifetime is zero and route is timedout it will be invalidated.
 262  * new_lifetime is in msec
 263  */
 264 int
 265 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
 266 {
 267         int timesince, now;
 268         uint32_t lifetime = 0;
 269
 270         KASSERT(rt != NULL, ("route is NULL"));
 271
 272         now = ticks;
 273         MESH_RT_ENTRY_LOCK(rt);
 274
 275         /* dont clobber a proxy entry gated by us */
 276         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
 277                 MESH_RT_ENTRY_UNLOCK(rt);
 278                 return rt->rt_lifetime;
 279         }
 280
 281         timesince = ticks_to_msecs(now - rt->rt_updtime);
 282         rt->rt_updtime = now;
 283         if (timesince >= rt->rt_lifetime) {
 284                 if (new_lifetime != 0) {
 285                         rt->rt_lifetime = new_lifetime;
 286                 }
 287                 else {
 288                         rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
 289                         rt->rt_lifetime = 0;
 290                 }
 291         } else {
 292                 /* update what is left of lifetime */
 293                 rt->rt_lifetime = rt->rt_lifetime - timesince;
 294                 rt->rt_lifetime  = MESH_ROUTE_LIFETIME_MAX(
 295                         new_lifetime, rt->rt_lifetime);
 296         }
 297         lifetime = rt->rt_lifetime;
 298         MESH_RT_ENTRY_UNLOCK(rt);
 299
 300         return lifetime;
 301 }
 302
 303 /*
 304  * Add a proxy route (as needed) for the specified destination.
 305  */
 306 void
 307 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
 308     const uint8_t dest[IEEE80211_ADDR_LEN])
 309 {
 310         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 311         struct ieee80211_mesh_route *rt;
 312
 313         MESH_RT_LOCK(ms);
 314         rt = mesh_rt_find_locked(ms, dest);
 315         if (rt == NULL) {
 316                 rt = mesh_rt_add_locked(vap, dest);
 317                 if (rt == NULL) {
 318                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 319                             "%s", "unable to add proxy entry");
 320                         vap->iv_stats.is_mesh_rtaddfailed++;
 321                 } else {
 322                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 323                             "%s", "add proxy entry");
 324                         IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
 325                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 326                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 327                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
 328                 }
 329         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 330                 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
 331                     ("no proxy flag for poxy entry"));
 332                 struct ieee80211com *ic = vap->iv_ic;
 333                 /*
 334                  * Fix existing entry created by received frames from
 335                  * stations that have some memory of dest.  We also
 336                  * flush any frames held on the staging queue; delivering
 337                  * them is too much trouble right now.
 338                  */
 339                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 340                     "%s", "fix proxy entry");
 341                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 342                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 343                              |  IEEE80211_MESHRT_FLAGS_PROXY;
 344                 /* XXX belongs in hwmp */
 345                 ieee80211_ageq_drain_node(&ic->ic_stageq,
 346                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
 347                 /* XXX stat? */
 348         }
 349         MESH_RT_UNLOCK(ms);
 350 }
 351
 352 static __inline void
 353 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
 354 {
 355         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
 356         /*
 357          * Grab the lock before destroying it, to be sure no one else
 358          * is holding the route.
 359          */
 360         MESH_RT_ENTRY_LOCK(rt);
 361         callout_drain(&rt->rt_discovery);
 362         MESH_RT_ENTRY_LOCK_DESTROY(rt);
 363         IEEE80211_FREE(rt, M_80211_MESH_RT);
 364 }
 365
 366 void
 367 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
 368     const uint8_t dest[IEEE80211_ADDR_LEN])
 369 {
 370         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 371         struct ieee80211_mesh_route *rt, *next;
 372
 373         MESH_RT_LOCK(ms);
 374         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 375                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
 376                         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
 377                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 378                                     IEEE80211_REASON_MESH_PERR_NO_PROXY);
 379                         } else {
 380                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 381                                     IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
 382                         }
 383                         mesh_rt_del(ms, rt);
 384                         MESH_RT_UNLOCK(ms);
 385                         return;
 386                 }
 387         }
 388         MESH_RT_UNLOCK(ms);
 389 }
 390
 391 void
 392 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
 393 {
 394         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 395         struct ieee80211_mesh_route *rt, *next;
 396
 397         if (ms == NULL)
 398                 return;
 399         MESH_RT_LOCK(ms);
 400         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
 401                 mesh_rt_del(ms, rt);
 402         MESH_RT_UNLOCK(ms);
 403 }
 404
 405 void
 406 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
 407     const uint8_t peer[IEEE80211_ADDR_LEN])
 408 {
 409         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 410         struct ieee80211_mesh_route *rt, *next;
 411
 412         MESH_RT_LOCK(ms);
 413         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 414                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
 415                         mesh_rt_del(ms, rt);
 416         }
 417         MESH_RT_UNLOCK(ms);
 418 }
 419
 420 /*
 421  * Flush expired routing entries, i.e. those in invalid state for
 422  * some time.
 423  */
 424 static void
 425 mesh_rt_flush_invalid(struct ieee80211vap *vap)
 426 {
 427         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 428         struct ieee80211_mesh_route *rt, *next;
 429
 430         if (ms == NULL)
 431                 return;
 432         MESH_RT_LOCK(ms);
 433         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 434                 /* Discover paths will be deleted by their own callout */
 435                 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
 436                         continue;
 437                 ieee80211_mesh_rt_update(rt, 0);
 438                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
 439                         mesh_rt_del(ms, rt);
 440         }
 441         MESH_RT_UNLOCK(ms);
 442 }
 443
 444 int
 445 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
 446 {
 447         int i, firstempty = -1;
 448
 449         for (i = 0; i < nitems(mesh_proto_paths); i++) {
 450                 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
 451                     IEEE80211_MESH_PROTO_DSZ) == 0)
 452                         return EEXIST;
 453                 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
 454                         firstempty = i;
 455         }
 456         if (firstempty < 0)
 457                 return ENOSPC;
 458         memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
 459         mesh_proto_paths[firstempty].mpp_active = 1;
 460         return 0;
 461 }
 462
 463 int
 464 ieee80211_mesh_register_proto_metric(const struct
 465     ieee80211_mesh_proto_metric *mpm)
 466 {
 467         int i, firstempty = -1;
 468
 469         for (i = 0; i < nitems(mesh_proto_metrics); i++) {
 470                 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
 471                     IEEE80211_MESH_PROTO_DSZ) == 0)
 472                         return EEXIST;
 473                 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
 474                         firstempty = i;
 475         }
 476         if (firstempty < 0)
 477                 return ENOSPC;
 478         memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
 479         mesh_proto_metrics[firstempty].mpm_active = 1;
 480         return 0;
 481 }
 482
 483 static int
 484 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
 485 {
 486         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 487         int i;
 488
 489         for (i = 0; i < nitems(mesh_proto_paths); i++) {
 490                 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
 491                         ms->ms_ppath = &mesh_proto_paths[i];
 492                         return 0;
 493                 }
 494         }
 495         return ENOENT;
 496 }
 497
 498 static int
 499 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
 500 {
 501         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 502         int i;
 503
 504         for (i = 0; i < nitems(mesh_proto_metrics); i++) {
 505                 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
 506                         ms->ms_pmetric = &mesh_proto_metrics[i];
 507                         return 0;
 508                 }
 509         }
 510         return ENOENT;
 511 }
 512
 513 static void
 514 mesh_gatemode_setup(struct ieee80211vap *vap)
 515 {
 516         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 517
 518         /*
 519          * NB: When a mesh gate is running as a ROOT it shall
 520          * not send out periodic GANNs but instead mark the
 521          * mesh gate flag for the corresponding proactive PREQ
 522          * and RANN frames.
 523          */
 524         if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
 525             (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
 526                 callout_drain(&ms->ms_gatetimer);
 527                 return ;
 528         }
 529         callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
 530             mesh_gatemode_cb, vap);
 531 }
 532
 533 static void
 534 mesh_gatemode_cb(void *arg)
 535 {
 536         struct ieee80211vap *vap = (struct ieee80211vap *)arg;
 537         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 538         struct ieee80211_meshgann_ie gann;
 539
 540         gann.gann_flags = 0; /* Reserved */
 541         gann.gann_hopcount = 0;
 542         gann.gann_ttl = ms->ms_ttl;
 543         IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
 544         gann.gann_seq = ms->ms_gateseq++;
 545         gann.gann_interval = ieee80211_mesh_gateint;
 546
 547         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
 548             "send broadcast GANN (seq %u)", gann.gann_seq);
 549
 550         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
 551             IEEE80211_ACTION_MESH_GANN, &gann);
 552         mesh_gatemode_setup(vap);
 553 }
 554
 555 static void
 556 ieee80211_mesh_init(void)
 557 {
 558
 559         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
 560         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
 561
 562         /*
 563          * Setup mesh parameters that depends on the clock frequency.
 564          */
 565         ieee80211_mesh_gateint = msecs_to_ticks(10000);
 566         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
 567         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
 568         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
 569         ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
 570
 571         /*
 572          * Register action frame handlers.
 573          */
 574         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 575             IEEE80211_ACTION_MESHPEERING_OPEN,
 576             mesh_recv_action_meshpeering_open);
 577         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 578             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 579             mesh_recv_action_meshpeering_confirm);
 580         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 581             IEEE80211_ACTION_MESHPEERING_CLOSE,
 582             mesh_recv_action_meshpeering_close);
 583         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 584             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
 585         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 586             IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
 587
 588         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 589             IEEE80211_ACTION_MESHPEERING_OPEN,
 590             mesh_send_action_meshpeering_open);
 591         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 592             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 593             mesh_send_action_meshpeering_confirm);
 594         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 595             IEEE80211_ACTION_MESHPEERING_CLOSE,
 596             mesh_send_action_meshpeering_close);
 597         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 598             IEEE80211_ACTION_MESH_LMETRIC,
 599             mesh_send_action_meshlmetric);
 600         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 601             IEEE80211_ACTION_MESH_GANN,
 602             mesh_send_action_meshgate);
 603
 604         /*
 605          * Register Airtime Link Metric.
 606          */
 607         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
 608
 609 }
 610 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
 611
 612 void
 613 ieee80211_mesh_attach(struct ieee80211com *ic)
 614 {
 615         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
 616 }
 617
 618 void
 619 ieee80211_mesh_detach(struct ieee80211com *ic)
 620 {
 621 }
 622
 623 static void
 624 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
 625 {
 626         struct ieee80211com *ic = ni->ni_ic;
 627         uint16_t args[3];
 628
 629         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
 630                 args[0] = ni->ni_mlpid;
 631                 args[1] = ni->ni_mllid;
 632                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 633                 ieee80211_send_action(ni,
 634                     IEEE80211_ACTION_CAT_SELF_PROT,
 635                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 636                     args);
 637         }
 638         callout_drain(&ni->ni_mltimer);
 639         /* XXX belongs in hwmp */
 640         ieee80211_ageq_drain_node(&ic->ic_stageq,
 641            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
 642 }
 643
 644 static void
 645 mesh_vdetach(struct ieee80211vap *vap)
 646 {
 647         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 648
 649         callout_drain(&ms->ms_cleantimer);
 650         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
 651             NULL);
 652         ieee80211_mesh_rt_flush(vap);
 653         MESH_RT_LOCK_DESTROY(ms);
 654         ms->ms_ppath->mpp_vdetach(vap);
 655         IEEE80211_FREE(vap->iv_mesh, M_80211_VAP);
 656         vap->iv_mesh = NULL;
 657 }
 658
 659 static void
 660 mesh_vattach(struct ieee80211vap *vap)
 661 {
 662         struct ieee80211_mesh_state *ms;
 663         vap->iv_newstate = mesh_newstate;
 664         vap->iv_input = mesh_input;
 665         vap->iv_opdetach = mesh_vdetach;
 666         vap->iv_recv_mgmt = mesh_recv_mgmt;
 667         vap->iv_recv_ctl = mesh_recv_ctl;
 668         ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
 669             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 670         if (ms == NULL) {
 671                 printf("%s: couldn't alloc MBSS state\n", __func__);
 672                 return;
 673         }
 674         vap->iv_mesh = ms;
 675         ms->ms_seq = 0;
 676         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
 677         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
 678         TAILQ_INIT(&ms->ms_known_gates);
 679         TAILQ_INIT(&ms->ms_routes);
 680         MESH_RT_LOCK_INIT(ms, "MBSS");
 681         callout_init(&ms->ms_cleantimer, 1);
 682         callout_init(&ms->ms_gatetimer, 1);
 683         ms->ms_gateseq = 0;
 684         mesh_select_proto_metric(vap, "AIRTIME");
 685         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
 686         mesh_select_proto_path(vap, "HWMP");
 687         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
 688         ms->ms_ppath->mpp_vattach(vap);
 689 }
 690
 691 /*
 692  * IEEE80211_M_MBSS vap state machine handler.
 693  */
 694 static int
 695 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 696 {
 697         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 698         struct ieee80211com *ic = vap->iv_ic;
 699         struct ieee80211_node *ni;
 700         enum ieee80211_state ostate;
 701
 702         IEEE80211_LOCK_ASSERT(ic);
 703
 704         ostate = vap->iv_state;
 705         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 706             __func__, ieee80211_state_name[ostate],
 707             ieee80211_state_name[nstate], arg);
 708         vap->iv_state = nstate;         /* state transition */
 709         if (ostate != IEEE80211_S_SCAN)
 710                 ieee80211_cancel_scan(vap);     /* background scan */
 711         ni = vap->iv_bss;                       /* NB: no reference held */
 712         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
 713                 callout_drain(&ms->ms_cleantimer);
 714                 callout_drain(&ms->ms_gatetimer);
 715         }
 716         switch (nstate) {
 717         case IEEE80211_S_INIT:
 718                 switch (ostate) {
 719                 case IEEE80211_S_SCAN:
 720                         ieee80211_cancel_scan(vap);
 721                         break;
 722                 case IEEE80211_S_CAC:
 723                         ieee80211_dfs_cac_stop(vap);
 724                         break;
 725                 case IEEE80211_S_RUN:
 726                         ieee80211_iterate_nodes(&ic->ic_sta,
 727                             mesh_vdetach_peers, NULL);
 728                         break;
 729                 default:
 730                         break;
 731                 }
 732                 if (ostate != IEEE80211_S_INIT) {
 733                         /* NB: optimize INIT -> INIT case */
 734                         ieee80211_reset_bss(vap);
 735                         ieee80211_mesh_rt_flush(vap);
 736                 }
 737                 break;
 738         case IEEE80211_S_SCAN:
 739                 switch (ostate) {
 740                 case IEEE80211_S_INIT:
 741                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 742                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
 743                             ms->ms_idlen != 0) {
 744                                 /*
 745                                  * Already have a channel and a mesh ID; bypass
 746                                  * the scan and startup immediately.
 747                                  */
 748                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 749                                 break;
 750                         }
 751                         /*
 752                          * Initiate a scan.  We can come here as a result
 753                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 754                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 755                          * and the scan request parameters will be present
 756                          * in iv_scanreq.  Otherwise we do the default.
 757                         */
 758                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 759                                 ieee80211_check_scan(vap,
 760                                     vap->iv_scanreq_flags,
 761                                     vap->iv_scanreq_duration,
 762                                     vap->iv_scanreq_mindwell,
 763                                     vap->iv_scanreq_maxdwell,
 764                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 765                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 766                         } else
 767                                 ieee80211_check_scan_current(vap);
 768                         break;
 769                 default:
 770                         break;
 771                 }
 772                 break;
 773         case IEEE80211_S_CAC:
 774                 /*
 775                  * Start CAC on a DFS channel.  We come here when starting
 776                  * a bss on a DFS channel (see ieee80211_create_ibss).
 777                  */
 778                 ieee80211_dfs_cac_start(vap);
 779                 break;
 780         case IEEE80211_S_RUN:
 781                 switch (ostate) {
 782                 case IEEE80211_S_INIT:
 783                         /*
 784                          * Already have a channel; bypass the
 785                          * scan and startup immediately.
 786                          * Note that ieee80211_create_ibss will call
 787                          * back to do a RUN->RUN state change.
 788                          */
 789                         ieee80211_create_ibss(vap,
 790                             ieee80211_ht_adjust_channel(ic,
 791                                 ic->ic_curchan, vap->iv_flags_ht));
 792                         /* NB: iv_bss is changed on return */
 793                         break;
 794                 case IEEE80211_S_CAC:
 795                         /*
 796                          * NB: This is the normal state change when CAC
 797                          * expires and no radar was detected; no need to
 798                          * clear the CAC timer as it's already expired.
 799                          */
 800                         /* fall thru... */
 801                 case IEEE80211_S_CSA:
 802 #if 0
 803                         /*
 804                          * Shorten inactivity timer of associated stations
 805                          * to weed out sta's that don't follow a CSA.
 806                          */
 807                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 808 #endif
 809                         /*
 810                          * Update bss node channel to reflect where
 811                          * we landed after CSA.
 812                          */
 813                         ieee80211_node_set_chan(ni,
 814                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 815                                 ieee80211_htchanflags(ni->ni_chan)));
 816                         /* XXX bypass debug msgs */
 817                         break;
 818                 case IEEE80211_S_SCAN:
 819                 case IEEE80211_S_RUN:
 820 #ifdef IEEE80211_DEBUG
 821                         if (ieee80211_msg_debug(vap)) {
 822                                 ieee80211_note(vap,
 823                                     "synchronized with %s meshid ",
 824                                     ether_sprintf(ni->ni_meshid));
 825                                 ieee80211_print_essid(ni->ni_meshid,
 826                                     ni->ni_meshidlen);
 827                                 /* XXX MCS/HT */
 828                                 printf(" channel %d\n",
 829                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
 830                         }
 831 #endif
 832                         break;
 833                 default:
 834                         break;
 835                 }
 836                 ieee80211_node_authorize(ni);
 837                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 838                     mesh_rt_cleanup_cb, vap);
 839                 mesh_gatemode_setup(vap);
 840                 break;
 841         default:
 842                 break;
 843         }
 844         /* NB: ostate not nstate */
 845         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
 846         return 0;
 847 }
 848
 849 static void
 850 mesh_rt_cleanup_cb(void *arg)
 851 {
 852         struct ieee80211vap *vap = arg;
 853         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 854
 855         mesh_rt_flush_invalid(vap);
 856         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 857             mesh_rt_cleanup_cb, vap);
 858 }
 859
 860 /*
 861  * Mark a mesh STA as gate and return a pointer to it.
 862  * If this is first time, we create a new gate route.
 863  * Always update the path route to this mesh gate.
 864  */
 865 struct ieee80211_mesh_gate_route *
 866 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
 867     struct ieee80211_mesh_route *rt)
 868 {
 869         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 870         struct ieee80211_mesh_gate_route *gr = NULL, *next;
 871         int found = 0;
 872
 873         MESH_RT_LOCK(ms);
 874         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
 875                 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
 876                         found = 1;
 877                         break;
 878                 }
 879         }
 880
 881         if (!found) {
 882                 /* New mesh gate add it to known table. */
 883                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
 884                     "%s", "stored new gate information from pro-PREQ.");
 885                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
 886                     M_80211_MESH_GT_RT,
 887                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 888                 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
 889                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
 890         }
 891         gr->gr_route = rt;
 892         /* TODO: link from path route to gate route */
 893         MESH_RT_UNLOCK(ms);
 894
 895         return gr;
 896 }
 897
 898 /*
 899  * Helper function to note the Mesh Peer Link FSM change.
 900  */
 901 static void
 902 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
 903 {
 904         struct ieee80211vap *vap = ni->ni_vap;
 905         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 906 #ifdef IEEE80211_DEBUG
 907         static const char *meshlinkstates[] = {
 908                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
 909                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
 910                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
 911                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
 912                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
 913                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
 914         };
 915 #endif
 916         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
 917             ni, "peer link: %s -> %s",
 918             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
 919
 920         /* track neighbor count */
 921         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
 922             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 923                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
 924                 ms->ms_neighbors++;
 925                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 926         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
 927             state != IEEE80211_NODE_MESH_ESTABLISHED) {
 928                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
 929                 ms->ms_neighbors--;
 930                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 931         }
 932         ni->ni_mlstate = state;
 933         switch (state) {
 934         case IEEE80211_NODE_MESH_HOLDING:
 935                 ms->ms_ppath->mpp_peerdown(ni);
 936                 break;
 937         case IEEE80211_NODE_MESH_ESTABLISHED:
 938                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
 939                 break;
 940         default:
 941                 break;
 942         }
 943 }
 944
 945 /*
 946  * Helper function to generate a unique local ID required for mesh
 947  * peer establishment.
 948  */
 949 static void
 950 mesh_checkid(void *arg, struct ieee80211_node *ni)
 951 {
 952         uint16_t *r = arg;
 953
 954         if (*r == ni->ni_mllid)
 955                 *(uint16_t *)arg = 0;
 956 }
 957
 958 static uint32_t
 959 mesh_generateid(struct ieee80211vap *vap)
 960 {
 961         int maxiter = 4;
 962         uint16_t r;
 963
 964         do {
 965                 get_random_bytes(&r, 2);
 966                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
 967                 maxiter--;
 968         } while (r == 0 && maxiter > 0);
 969         return r;
 970 }
 971
 972 /*
 973  * Verifies if we already received this packet by checking its
 974  * sequence number.
 975  * Returns 0 if the frame is to be accepted, 1 otherwise.
 976  */
 977 static int
 978 mesh_checkpseq(struct ieee80211vap *vap,
 979     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
 980 {
 981         struct ieee80211_mesh_route *rt;
 982
 983         rt = ieee80211_mesh_rt_find(vap, source);
 984         if (rt == NULL) {
 985                 rt = ieee80211_mesh_rt_add(vap, source);
 986                 if (rt == NULL) {
 987                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 988                             "%s", "add mcast route failed");
 989                         vap->iv_stats.is_mesh_rtaddfailed++;
 990                         return 1;
 991                 }
 992                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 993                     "add mcast route, mesh seqno %d", seq);
 994                 rt->rt_lastmseq = seq;
 995                 return 0;
 996         }
 997         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
 998                 return 1;
 999         } else {
1000                 rt->rt_lastmseq = seq;
1001                 return 0;
1002         }
1003 }
1004
1005 /*
1006  * Iterate the routing table and locate the next hop.
1007  */
1008 struct ieee80211_node *
1009 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1010     const uint8_t dest[IEEE80211_ADDR_LEN])
1011 {
1012         struct ieee80211_mesh_route *rt;
1013
1014         rt = ieee80211_mesh_rt_find(vap, dest);
1015         if (rt == NULL)
1016                 return NULL;
1017         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1018                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1019                     "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1020                 /* XXX stat */
1021                 return NULL;
1022         }
1023         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1024                 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1025                 if (rt == NULL) return NULL;
1026                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1027                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1028                             "%s: meshgate !valid, flags 0x%x", __func__,
1029                             rt->rt_flags);
1030                         /* XXX stat */
1031                         return NULL;
1032                 }
1033         }
1034         return ieee80211_find_txnode(vap, rt->rt_nexthop);
1035 }
1036
1037 static void
1038 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1039     struct ieee80211_mesh_route *rt_gate)
1040 {
1041         struct ifnet *ifp = vap->iv_ifp;
1042         struct ieee80211_node *ni;
1043
1044         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1045
1046         ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1047         if (ni == NULL) {
1048                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1049                 m_freem(m);
1050                 return;
1051         }
1052
1053         /*
1054          * Send through the VAP packet transmit path.
1055          * This consumes the node ref grabbed above and
1056          * the mbuf, regardless of whether there's a problem
1057          * or not.
1058          */
1059         (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1060 }
1061
1062 /*
1063  * Forward the queued frames to known valid mesh gates.
1064  * Assume destination to be outside the MBSS (i.e. proxy entry),
1065  * If no valid mesh gates are known silently discard queued frames.
1066  * After transmitting frames to all known valid mesh gates, this route
1067  * will be marked invalid, and a new path discovery will happen in the hopes
1068  * that (at least) one of the mesh gates have a new proxy entry for us to use.
1069  */
1070 void
1071 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1072     struct ieee80211_mesh_route *rt_dest)
1073 {
1074         struct ieee80211com *ic = vap->iv_ic;
1075         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1076         struct ieee80211_mesh_route *rt_gate;
1077         struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1078         struct mbuf *m, *mcopy, *next;
1079
1080         IEEE80211_TX_UNLOCK_ASSERT(ic);
1081
1082         KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1083             ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1084
1085         /* XXX: send to more than one valid mash gate */
1086         MESH_RT_LOCK(ms);
1087
1088         m = ieee80211_ageq_remove(&ic->ic_stageq,
1089             (struct ieee80211_node *)(uintptr_t)
1090             ieee80211_mac_hash(ic, rt_dest->rt_dest));
1091
1092         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1093                 rt_gate = gr->gr_route;
1094                 if (rt_gate == NULL) {
1095                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1096                                 rt_dest->rt_dest,
1097                                 "mesh gate with no path %6D",
1098                                 gr->gr_addr, ":");
1099                         continue;
1100                 }
1101                 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1102                         continue;
1103                 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1104                     ("route not marked as a mesh gate"));
1105                 KASSERT((rt_gate->rt_flags &
1106                         IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1107                         ("found mesh gate that is also marked porxy"));
1108                 /*
1109                  * convert route to a proxy route gated by the current
1110                  * mesh gate, this is needed so encap can built data
1111                  * frame with correct address.
1112                  */
1113                 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1114                         IEEE80211_MESHRT_FLAGS_VALID;
1115                 rt_dest->rt_ext_seq = 1; /* random value */
1116                 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1117                 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1118                 rt_dest->rt_metric = rt_gate->rt_metric;
1119                 rt_dest->rt_nhops = rt_gate->rt_nhops;
1120                 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1121                 MESH_RT_UNLOCK(ms);
1122                 /* XXX: lock?? */
1123                 mcopy = m_dup(m, M_NOWAIT);
1124                 for (; mcopy != NULL; mcopy = next) {
1125                         next = mcopy->m_nextpkt;
1126                         mcopy->m_nextpkt = NULL;
1127                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1128                             rt_dest->rt_dest,
1129                             "flush queued frame %p len %d", mcopy,
1130                             mcopy->m_pkthdr.len);
1131                         mesh_transmit_to_gate(vap, mcopy, rt_gate);
1132                 }
1133                 MESH_RT_LOCK(ms);
1134         }
1135         rt_dest->rt_flags = 0; /* Mark invalid */
1136         m_freem(m);
1137         MESH_RT_UNLOCK(ms);
1138 }
1139
1140 /*
1141  * Forward the specified frame.
1142  * Decrement the TTL and set TA to our MAC address.
1143  */
1144 static void
1145 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1146     const struct ieee80211_meshcntl *mc)
1147 {
1148         struct ieee80211com *ic = vap->iv_ic;
1149         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1150         struct ifnet *ifp = vap->iv_ifp;
1151         const struct ieee80211_frame *wh =
1152             mtod(m, const struct ieee80211_frame *);
1153         struct mbuf *mcopy;
1154         struct ieee80211_meshcntl *mccopy;
1155         struct ieee80211_frame *whcopy;
1156         struct ieee80211_node *ni;
1157         int err;
1158
1159         /* This is called from the RX path - don't hold this lock */
1160         IEEE80211_TX_UNLOCK_ASSERT(ic);
1161
1162         /*
1163          * mesh ttl of 1 means we are the last one receiving it,
1164          * according to amendment we decrement and then check if
1165          * 0, if so we dont forward.
1166          */
1167         if (mc->mc_ttl < 1) {
1168                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1169                     "%s", "frame not fwd'd, ttl 1");
1170                 vap->iv_stats.is_mesh_fwd_ttl++;
1171                 return;
1172         }
1173         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1174                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1175                     "%s", "frame not fwd'd, fwding disabled");
1176                 vap->iv_stats.is_mesh_fwd_disabled++;
1177                 return;
1178         }
1179         mcopy = m_dup(m, M_NOWAIT);
1180         if (mcopy == NULL) {
1181                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1182                     "%s", "frame not fwd'd, cannot dup");
1183                 vap->iv_stats.is_mesh_fwd_nobuf++;
1184                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1185                 return;
1186         }
1187         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1188             sizeof(struct ieee80211_meshcntl));
1189         if (mcopy == NULL) {
1190                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1191                     "%s", "frame not fwd'd, too short");
1192                 vap->iv_stats.is_mesh_fwd_tooshort++;
1193                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1194                 m_freem(mcopy);
1195                 return;
1196         }
1197         whcopy = mtod(mcopy, struct ieee80211_frame *);
1198         mccopy = (struct ieee80211_meshcntl *)
1199             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1200         /* XXX clear other bits? */
1201         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1202         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1203         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1204                 ni = ieee80211_ref_node(vap->iv_bss);
1205                 mcopy->m_flags |= M_MCAST;
1206         } else {
1207                 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1208                 if (ni == NULL) {
1209                         /*
1210                          * [Optional] any of the following three actions:
1211                          * o silently discard
1212                          * o trigger a path discovery
1213                          * o inform TA that meshDA is unknown.
1214                          */
1215                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1216                             "%s", "frame not fwd'd, no path");
1217                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1218                             IEEE80211_REASON_MESH_PERR_NO_FI);
1219                         vap->iv_stats.is_mesh_fwd_nopath++;
1220                         m_freem(mcopy);
1221                         return;
1222                 }
1223                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1224         }
1225         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1226         mccopy->mc_ttl--;
1227
1228         /* XXX calculate priority so drivers can find the tx queue */
1229         M_WME_SETAC(mcopy, WME_AC_BE);
1230
1231         /* XXX do we know m_nextpkt is NULL? */
1232         MPASS((mcopy->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
1233         mcopy->m_pkthdr.rcvif = (void *) ni;
1234
1235         /*
1236          * XXX this bypasses all of the VAP TX handling; it passes frames
1237          * directly to the parent interface.
1238          *
1239          * Because of this, there's no TX lock being held as there's no
1240          * encaps state being used.
1241          *
1242          * Doing a direct parent transmit may not be the correct thing
1243          * to do here; we'll have to re-think this soon.
1244          */
1245         IEEE80211_TX_LOCK(ic);
1246         err = ieee80211_parent_xmitpkt(ic, mcopy);
1247         IEEE80211_TX_UNLOCK(ic);
1248         if (!err)
1249                 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
1250 }
1251
1252 static struct mbuf *
1253 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1254 {
1255 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1256 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1257         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1258                   sizeof(struct ieee80211_meshcntl_ae10)];
1259         const struct ieee80211_qosframe_addr4 *wh;
1260         const struct ieee80211_meshcntl_ae10 *mc;
1261         struct ether_header *eh;
1262         struct llc *llc;
1263         int ae;
1264
1265         if (m->m_len < hdrlen + sizeof(*llc) &&
1266             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1267                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1268                     "discard data frame: %s", "m_pullup failed");
1269                 vap->iv_stats.is_rx_tooshort++;
1270                 return NULL;
1271         }
1272         memcpy(b, mtod(m, caddr_t), hdrlen);
1273         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1274         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1275         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1276                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1277             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1278
1279         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1280         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1281             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1282             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1283             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1284             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1285               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1286                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1287                 llc = NULL;
1288         } else {
1289                 m_adj(m, hdrlen - sizeof(*eh));
1290         }
1291         eh = mtod(m, struct ether_header *);
1292         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1293         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1294                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1295                 if (ae == IEEE80211_MESH_AE_00) {
1296                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1297                 } else if (ae == IEEE80211_MESH_AE_01) {
1298                         IEEE80211_ADDR_COPY(eh->ether_shost,
1299                             MC01(mc)->mc_addr4);
1300                 } else {
1301                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1302                             (const struct ieee80211_frame *)wh, NULL,
1303                             "bad AE %d", ae);
1304                         vap->iv_stats.is_mesh_badae++;
1305                         m_freem(m);
1306                         return NULL;
1307                 }
1308         } else {
1309                 if (ae == IEEE80211_MESH_AE_00) {
1310                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1311                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1312                 } else if (ae == IEEE80211_MESH_AE_10) {
1313                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1314                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1315                 } else {
1316                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1317                             (const struct ieee80211_frame *)wh, NULL,
1318                             "bad AE %d", ae);
1319                         vap->iv_stats.is_mesh_badae++;
1320                         m_freem(m);
1321                         return NULL;
1322                 }
1323         }
1324 #ifndef __NO_STRICT_ALIGNMENT
1325         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1326                 m = ieee80211_realign(vap, m, sizeof(*eh));
1327                 if (m == NULL)
1328                         return NULL;
1329         }
1330 #endif /* !__NO_STRICT_ALIGNMENT */
1331         if (llc != NULL) {
1332                 eh = mtod(m, struct ether_header *);
1333                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1334         }
1335         return m;
1336 #undef  WDIR
1337 #undef  MC01
1338 }
1339
1340 /*
1341  * Return non-zero if the unicast mesh data frame should be processed
1342  * locally.  Frames that are not proxy'd have our address, otherwise
1343  * we need to consult the routing table to look for a proxy entry.
1344  */
1345 static __inline int
1346 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1347     const struct ieee80211_meshcntl *mc)
1348 {
1349         int ae = mc->mc_flags & 3;
1350
1351         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1352             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1353         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1354             ("bad AE %d", ae));
1355         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
1356                 const struct ieee80211_meshcntl_ae10 *mc10 =
1357                     (const struct ieee80211_meshcntl_ae10 *) mc;
1358                 struct ieee80211_mesh_route *rt =
1359                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1360                 /* check for proxy route to ourself */
1361                 return (rt != NULL &&
1362                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1363         } else                                  /* ucast w/o proxy */
1364                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1365 }
1366
1367 /*
1368  * Verifies transmitter, updates lifetime, precursor list and forwards data.
1369  * > 0 means we have forwarded data and no need to process locally
1370  * == 0 means we want to process locally (and we may have forwarded data
1371  * < 0 means there was an error and data should be discarded
1372  */
1373 static int
1374 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1375     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1376 {
1377         struct ieee80211_qosframe_addr4 *qwh;
1378         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1379         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1380
1381         /* This is called from the RX path - don't hold this lock */
1382         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1383
1384         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1385
1386         /*
1387          * TODO:
1388          * o verify addr2 is  a legitimate transmitter
1389          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1390          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1391          */
1392
1393         /* set lifetime of addr3 (meshDA) to initial value */
1394         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1395         if (rt_meshda == NULL) {
1396                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1397                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
1398                 /*
1399                  * [Optional] any of the following three actions:
1400                  * o silently discard                           [X]
1401                  * o trigger a path discovery                   [ ]
1402                  * o inform TA that meshDA is unknown.          [ ]
1403                  */
1404                 /* XXX: stats */
1405                 return (-1);
1406         }
1407
1408         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1409             ms->ms_ppath->mpp_inact));
1410
1411         /* set lifetime of addr4 (meshSA) to initial value */
1412         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1413         KASSERT(rt_meshsa != NULL, ("no route"));
1414         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1415             ms->ms_ppath->mpp_inact));
1416
1417         mesh_forward(vap, m, mc);
1418         return (1); /* dont process locally */
1419 }
1420
1421 /*
1422  * Verifies transmitter, updates lifetime, precursor list and process data
1423  * locally, if data is proxy with AE = 10 it could mean data should go
1424  * on another mesh path or data should be forwarded to the DS.
1425  *
1426  * > 0 means we have forwarded data and no need to process locally
1427  * == 0 means we want to process locally (and we may have forwarded data
1428  * < 0 means there was an error and data should be discarded
1429  */
1430 static int
1431 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1432     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1433 {
1434         struct ieee80211_qosframe_addr4 *qwh;
1435         const struct ieee80211_meshcntl_ae10 *mc10;
1436         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1437         struct ieee80211_mesh_route *rt;
1438         int ae;
1439
1440         /* This is called from the RX path - don't hold this lock */
1441         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1442
1443         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1444         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1445
1446         /*
1447          * TODO:
1448          * o verify addr2 is  a legitimate transmitter
1449          * o lifetime of precursor entry is max(init, curr)
1450          */
1451
1452         /* set lifetime of addr4 (meshSA) to initial value */
1453         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1454         KASSERT(rt != NULL, ("no route"));
1455         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1456         rt = NULL;
1457
1458         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1459         KASSERT(ae == IEEE80211_MESH_AE_00 ||
1460             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1461         if (ae == IEEE80211_MESH_AE_10) {
1462                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1463                         return (0); /* process locally */
1464                 }
1465
1466                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1467                 if (rt != NULL &&
1468                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1469                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1470                         /*
1471                          * Forward on another mesh-path, according to
1472                          * amendment as specified in 9.32.4.1
1473                          */
1474                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1475                         mesh_forward(vap, m,
1476                             (const struct ieee80211_meshcntl *)mc10);
1477                         return (1); /* dont process locally */
1478                 }
1479                 /*
1480                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
1481                  * addressed according to 13.11.3.2.
1482                  */
1483                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1484                     "forward frame to DS, SA(%6D) DA(%6D)",
1485                     mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1486         }
1487         return (0); /* process locally */
1488 }
1489
1490 /*
1491  * Try to forward the group addressed data on to other mesh STAs, and
1492  * also to the DS.
1493  *
1494  * > 0 means we have forwarded data and no need to process locally
1495  * == 0 means we want to process locally (and we may have forwarded data
1496  * < 0 means there was an error and data should be discarded
1497  */
1498 static int
1499 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1500     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1501 {
1502 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1503         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1504
1505         /* This is called from the RX path - don't hold this lock */
1506         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1507
1508         mesh_forward(vap, m, mc);
1509
1510         if(mc->mc_ttl > 0) {
1511                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1512                         /*
1513                          * Forward of MSDUs from the MBSS to DS group addressed
1514                          * (according to 13.11.3.2)
1515                          * This happens by delivering the packet, and a bridge
1516                          * will sent it on another port member.
1517                          */
1518                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1519                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD) {
1520                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1521                                     MC01(mc)->mc_addr4, "%s",
1522                                     "forward from MBSS to the DS");
1523                         }
1524                 }
1525         }
1526         return (0); /* process locally */
1527 #undef  MC01
1528 }
1529
1530 static int
1531 mesh_input(struct ieee80211_node *ni, struct mbuf *m,
1532     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1533 {
1534 #define HAS_SEQ(type)   ((type & 0x4) == 0)
1535 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1536         struct ieee80211vap *vap = ni->ni_vap;
1537         struct ieee80211com *ic = ni->ni_ic;
1538         struct ifnet *ifp = vap->iv_ifp;
1539         struct ieee80211_frame *wh;
1540         const struct ieee80211_meshcntl *mc;
1541         int hdrspace, meshdrlen, need_tap, error;
1542         uint8_t dir, type, subtype, ae;
1543         uint32_t seq;
1544         const uint8_t *addr;
1545         uint8_t qos[2];
1546
1547         KASSERT(ni != NULL, ("null node"));
1548         ni->ni_inact = ni->ni_inact_reload;
1549
1550         need_tap = 1;                   /* mbuf need to be tapped. */
1551         type = -1;                      /* undefined */
1552
1553         /* This is called from the RX path - don't hold this lock */
1554         IEEE80211_TX_UNLOCK_ASSERT(ic);
1555
1556         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1557                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1558                     ni->ni_macaddr, NULL,
1559                     "too short (1): len %u", m->m_pkthdr.len);
1560                 vap->iv_stats.is_rx_tooshort++;
1561                 goto out;
1562         }
1563         /*
1564          * Bit of a cheat here, we use a pointer for a 3-address
1565          * frame format but don't reference fields past outside
1566          * ieee80211_frame_min w/o first validating the data is
1567          * present.
1568         */
1569         wh = mtod(m, struct ieee80211_frame *);
1570
1571         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1572             IEEE80211_FC0_VERSION_0) {
1573                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1574                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1575                 vap->iv_stats.is_rx_badversion++;
1576                 goto err;
1577         }
1578         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1579         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1580         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1581         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1582                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1583                 ni->ni_noise = nf;
1584                 if (HAS_SEQ(type)) {
1585                         uint8_t tid = ieee80211_gettid(wh);
1586
1587                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
1588                             TID_TO_WME_AC(tid) >= WME_AC_VI)
1589                                 ic->ic_wme.wme_hipri_traffic++;
1590                         if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs))
1591                                 goto out;
1592                 }
1593         }
1594 #ifdef IEEE80211_DEBUG
1595         /*
1596          * It's easier, but too expensive, to simulate different mesh
1597          * topologies by consulting the ACL policy very early, so do this
1598          * only under DEBUG.
1599          *
1600          * NB: this check is also done upon peering link initiation.
1601          */
1602         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1603                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1604                     wh, NULL, "%s", "disallowed by ACL");
1605                 vap->iv_stats.is_rx_acl++;
1606                 goto out;
1607         }
1608 #endif
1609         switch (type) {
1610         case IEEE80211_FC0_TYPE_DATA:
1611                 if (ni == vap->iv_bss)
1612                         goto out;
1613                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1614                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1615                             ni->ni_macaddr, NULL,
1616                             "peer link not yet established (%d)",
1617                             ni->ni_mlstate);
1618                         vap->iv_stats.is_mesh_nolink++;
1619                         goto out;
1620                 }
1621                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1622                     dir != IEEE80211_FC1_DIR_DSTODS) {
1623                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1624                             wh, "data", "incorrect dir 0x%x", dir);
1625                         vap->iv_stats.is_rx_wrongdir++;
1626                         goto err;
1627                 }
1628
1629                 /* All Mesh data frames are QoS subtype */
1630                 if (!HAS_SEQ(type)) {
1631                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1632                             wh, "data", "incorrect subtype 0x%x", subtype);
1633                         vap->iv_stats.is_rx_badsubtype++;
1634                         goto err;
1635                 }
1636
1637                 /*
1638                  * Next up, any fragmentation.
1639                  * XXX: we defrag before we even try to forward,
1640                  * Mesh Control field is not present in sub-sequent
1641                  * fragmented frames. This is in contrast to Draft 4.0.
1642                  */
1643                 hdrspace = ieee80211_hdrspace(ic, wh);
1644                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1645                         m = ieee80211_defrag(ni, m, hdrspace);
1646                         if (m == NULL) {
1647                                 /* Fragment dropped or frame not complete yet */
1648                                 goto out;
1649                         }
1650                 }
1651                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1652
1653                 /*
1654                  * Now we have a complete Mesh Data frame.
1655                  */
1656
1657                 /*
1658                  * Only fromDStoDS data frames use 4 address qos frames
1659                  * as specified in amendment. Otherwise addr4 is located
1660                  * in the Mesh Control field and a 3 address qos frame
1661                  * is used.
1662                  */
1663                 *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh);
1664
1665                 /*
1666                  * NB: The mesh STA sets the Mesh Control Present
1667                  * subfield to 1 in the Mesh Data frame containing
1668                  * an unfragmented MSDU, an A-MSDU, or the first
1669                  * fragment of an MSDU.
1670                  * After defrag it should always be present.
1671                  */
1672                 if (!(qos[1] & IEEE80211_QOS_MC)) {
1673                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1674                             ni->ni_macaddr, NULL,
1675                             "%s", "Mesh control field not present");
1676                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1677                         goto err;
1678                 }
1679
1680                 /* pull up enough to get to the mesh control */
1681                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1682                     (m = m_pullup(m, hdrspace +
1683                         sizeof(struct ieee80211_meshcntl))) == NULL) {
1684                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1685                             ni->ni_macaddr, NULL,
1686                             "data too short: expecting %u", hdrspace);
1687                         vap->iv_stats.is_rx_tooshort++;
1688                         goto out;               /* XXX */
1689                 }
1690                 /*
1691                  * Now calculate the full extent of the headers. Note
1692                  * mesh_decap will pull up anything we didn't get
1693                  * above when it strips the 802.11 headers.
1694                  */
1695                 mc = (const struct ieee80211_meshcntl *)
1696                     (mtod(m, const uint8_t *) + hdrspace);
1697                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1698                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1699                     ae * IEEE80211_ADDR_LEN;
1700                 hdrspace += meshdrlen;
1701
1702                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1703                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1704                     (m->m_len < hdrspace) &&
1705                     ((m = m_pullup(m, hdrspace)) == NULL)) {
1706                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1707                             ni->ni_macaddr, NULL,
1708                             "data too short: expecting %u", hdrspace);
1709                         vap->iv_stats.is_rx_tooshort++;
1710                         goto out;               /* XXX */
1711                 }
1712                 /* XXX: are we sure there is no reallocating after m_pullup? */
1713
1714                 seq = le32dec(mc->mc_seq);
1715                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1716                         addr = wh->i_addr3;
1717                 else if (ae == IEEE80211_MESH_AE_01)
1718                         addr = MC01(mc)->mc_addr4;
1719                 else
1720                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1721                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1722                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1723                             addr, "data", "%s", "not to me");
1724                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1725                         goto out;
1726                 }
1727                 if (mesh_checkpseq(vap, addr, seq) != 0) {
1728                         vap->iv_stats.is_rx_dup++;
1729                         goto out;
1730                 }
1731
1732                 /* This code "routes" the frame to the right control path */
1733                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1734                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1735                                 error =
1736                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1737                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1738                                 error = mesh_recv_group_data(vap, m, wh, mc);
1739                         else
1740                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1741                                     wh, mc);
1742                 } else
1743                         error = mesh_recv_group_data(vap, m, wh, mc);
1744                 if (error < 0)
1745                         goto err;
1746                 else if (error > 0)
1747                         goto out;
1748
1749                 if (ieee80211_radiotap_active_vap(vap))
1750                         ieee80211_radiotap_rx(vap, m);
1751                 need_tap = 0;
1752
1753                 /*
1754                  * Finally, strip the 802.11 header.
1755                  */
1756                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1757                 if (m == NULL) {
1758                         /* XXX mask bit to check for both */
1759                         /* don't count Null data frames as errors */
1760                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1761                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1762                                 goto out;
1763                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1764                             ni->ni_macaddr, "data", "%s", "decap error");
1765                         vap->iv_stats.is_rx_decap++;
1766                         IEEE80211_NODE_STAT(ni, rx_decap);
1767                         goto err;
1768                 }
1769                 if (qos[0] & IEEE80211_QOS_AMSDU) {
1770                         m = ieee80211_decap_amsdu(ni, m);
1771                         if (m == NULL)
1772                                 return IEEE80211_FC0_TYPE_DATA;
1773                 }
1774                 ieee80211_deliver_data(vap, ni, m);
1775                 return type;
1776         case IEEE80211_FC0_TYPE_MGT:
1777                 vap->iv_stats.is_rx_mgmt++;
1778                 IEEE80211_NODE_STAT(ni, rx_mgmt);
1779                 if (dir != IEEE80211_FC1_DIR_NODS) {
1780                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1781                             wh, "mgt", "incorrect dir 0x%x", dir);
1782                         vap->iv_stats.is_rx_wrongdir++;
1783                         goto err;
1784                 }
1785                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1786                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1787                             ni->ni_macaddr, "mgt", "too short: len %u",
1788                             m->m_pkthdr.len);
1789                         vap->iv_stats.is_rx_tooshort++;
1790                         goto out;
1791                 }
1792 #ifdef IEEE80211_DEBUG
1793                 if ((ieee80211_msg_debug(vap) &&
1794                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1795                     ieee80211_msg_dumppkts(vap)) {
1796                         if_printf(ifp, "received %s from %s rssi %d\n",
1797                             ieee80211_mgt_subtype_name(subtype),
1798                             ether_sprintf(wh->i_addr2), rssi);
1799                 }
1800 #endif
1801                 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1802                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1803                             wh, NULL, "%s", "WEP set but not permitted");
1804                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1805                         goto out;
1806                 }
1807                 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
1808                 goto out;
1809         case IEEE80211_FC0_TYPE_CTL:
1810                 vap->iv_stats.is_rx_ctl++;
1811                 IEEE80211_NODE_STAT(ni, rx_ctrl);
1812                 goto out;
1813         default:
1814                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1815                     wh, "bad", "frame type 0x%x", type);
1816                 /* should not come here */
1817                 break;
1818         }
1819 err:
1820         if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
1821 out:
1822         if (m != NULL) {
1823                 if (need_tap && ieee80211_radiotap_active_vap(vap))
1824                         ieee80211_radiotap_rx(vap, m);
1825                 m_freem(m);
1826         }
1827         return type;
1828 #undef  HAS_SEQ
1829 #undef  MC01
1830 }
1831
1832 static void
1833 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1834     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1835 {
1836         struct ieee80211vap *vap = ni->ni_vap;
1837         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1838         struct ieee80211com *ic = ni->ni_ic;
1839         struct ieee80211_channel *rxchan = ic->ic_curchan;
1840         struct ieee80211_frame *wh;
1841         struct ieee80211_mesh_route *rt;
1842         uint8_t *frm, *efrm;
1843
1844         wh = mtod(m0, struct ieee80211_frame *);
1845         frm = (uint8_t *)&wh[1];
1846         efrm = mtod(m0, uint8_t *) + m0->m_len;
1847         switch (subtype) {
1848         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1849         case IEEE80211_FC0_SUBTYPE_BEACON:
1850         {
1851                 struct ieee80211_scanparams scan;
1852                 struct ieee80211_channel *c;
1853                 /*
1854                  * We process beacon/probe response
1855                  * frames to discover neighbors.
1856                  */
1857                 if (rxs != NULL) {
1858                         c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1859                         if (c != NULL)
1860                                 rxchan = c;
1861                 }
1862                 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
1863                         return;
1864                 /*
1865                  * Count frame now that we know it's to be processed.
1866                  */
1867                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1868                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
1869                         IEEE80211_NODE_STAT(ni, rx_beacons);
1870                 } else
1871                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1872                 /*
1873                  * If scanning, just pass information to the scan module.
1874                  */
1875                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1876                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1877                                 /*
1878                                  * Actively scanning a channel marked passive;
1879                                  * send a probe request now that we know there
1880                                  * is 802.11 traffic present.
1881                                  *
1882                                  * XXX check if the beacon we recv'd gives
1883                                  * us what we need and suppress the probe req
1884                                  */
1885                                 ieee80211_probe_curchan(vap, 1);
1886                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1887                         }
1888                         ieee80211_add_scan(vap, rxchan, &scan, wh,
1889                             subtype, rssi, nf);
1890                         return;
1891                 }
1892
1893                 /* The rest of this code assumes we are running */
1894                 if (vap->iv_state != IEEE80211_S_RUN)
1895                         return;
1896                 /*
1897                  * Ignore non-mesh STAs.
1898                  */
1899                 if ((scan.capinfo &
1900                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1901                     scan.meshid == NULL || scan.meshconf == NULL) {
1902                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1903                             wh, "beacon", "%s", "not a mesh sta");
1904                         vap->iv_stats.is_mesh_wrongmesh++;
1905                         return;
1906                 }
1907                 /*
1908                  * Ignore STAs for other mesh networks.
1909                  */
1910                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1911                     mesh_verify_meshconf(vap, scan.meshconf)) {
1912                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1913                             wh, "beacon", "%s", "not for our mesh");
1914                         vap->iv_stats.is_mesh_wrongmesh++;
1915                         return;
1916                 }
1917                 /*
1918                  * Peer only based on the current ACL policy.
1919                  */
1920                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1921                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1922                             wh, NULL, "%s", "disallowed by ACL");
1923                         vap->iv_stats.is_rx_acl++;
1924                         return;
1925                 }
1926                 /*
1927                  * Do neighbor discovery.
1928                  */
1929                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1930                         /*
1931                          * Create a new entry in the neighbor table.
1932                          */
1933                         ni = ieee80211_add_neighbor(vap, wh, &scan);
1934                 }
1935                 /*
1936                  * Automatically peer with discovered nodes if possible.
1937                  */
1938                 if (ni != vap->iv_bss &&
1939                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1940                         switch (ni->ni_mlstate) {
1941                         case IEEE80211_NODE_MESH_IDLE:
1942                         {
1943                                 uint16_t args[1];
1944
1945                                 /* Wait for backoff callout to reset counter */
1946                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1947                                         return;
1948
1949                                 ni->ni_mlpid = mesh_generateid(vap);
1950                                 if (ni->ni_mlpid == 0)
1951                                         return;
1952                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1953                                 args[0] = ni->ni_mlpid;
1954                                 ieee80211_send_action(ni,
1955                                 IEEE80211_ACTION_CAT_SELF_PROT,
1956                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1957                                 ni->ni_mlrcnt = 0;
1958                                 mesh_peer_timeout_setup(ni);
1959                                 break;
1960                         }
1961                         case IEEE80211_NODE_MESH_ESTABLISHED:
1962                         {
1963                                 /*
1964                                  * Valid beacon from a peer mesh STA
1965                                  * bump TA lifetime
1966                                  */
1967                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1968                                 if(rt != NULL) {
1969                                         ieee80211_mesh_rt_update(rt,
1970                                             ticks_to_msecs(
1971                                             ms->ms_ppath->mpp_inact));
1972                                 }
1973                                 break;
1974                         }
1975                         default:
1976                                 break; /* ignore */
1977                         }
1978                 }
1979                 break;
1980         }
1981         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1982         {
1983                 uint8_t *ssid, *meshid, *rates, *xrates;
1984
1985                 if (vap->iv_state != IEEE80211_S_RUN) {
1986                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1987                             wh, NULL, "wrong state %s",
1988                             ieee80211_state_name[vap->iv_state]);
1989                         vap->iv_stats.is_rx_mgtdiscard++;
1990                         return;
1991                 }
1992                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1993                         /* frame must be directed */
1994                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1995                             wh, NULL, "%s", "not unicast");
1996                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
1997                         return;
1998                 }
1999                 /*
2000                  * prreq frame format
2001                  *      [tlv] ssid
2002                  *      [tlv] supported rates
2003                  *      [tlv] extended supported rates
2004                  *      [tlv] mesh id
2005                  */
2006                 ssid = meshid = rates = xrates = NULL;
2007                 while (efrm - frm > 1) {
2008                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2009                         switch (*frm) {
2010                         case IEEE80211_ELEMID_SSID:
2011                                 ssid = frm;
2012                                 break;
2013                         case IEEE80211_ELEMID_RATES:
2014                                 rates = frm;
2015                                 break;
2016                         case IEEE80211_ELEMID_XRATES:
2017                                 xrates = frm;
2018                                 break;
2019                         case IEEE80211_ELEMID_MESHID:
2020                                 meshid = frm;
2021                                 break;
2022                         }
2023                         frm += frm[1] + 2;
2024                 }
2025                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2026                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2027                 if (xrates != NULL)
2028                         IEEE80211_VERIFY_ELEMENT(xrates,
2029                             IEEE80211_RATE_MAXSIZE - rates[1], return);
2030                 if (meshid != NULL) {
2031                         IEEE80211_VERIFY_ELEMENT(meshid,
2032                             IEEE80211_MESHID_LEN, return);
2033                         /* NB: meshid, not ssid */
2034                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2035                 }
2036
2037                 /* XXX find a better class or define it's own */
2038                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2039                     "%s", "recv probe req");
2040                 /*
2041                  * Some legacy 11b clients cannot hack a complete
2042                  * probe response frame.  When the request includes
2043                  * only a bare-bones rate set, communicate this to
2044                  * the transmit side.
2045                  */
2046                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2047                 break;
2048         }
2049
2050         case IEEE80211_FC0_SUBTYPE_ACTION:
2051         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2052                 if (ni == vap->iv_bss) {
2053                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2054                             wh, NULL, "%s", "unknown node");
2055                         vap->iv_stats.is_rx_mgtdiscard++;
2056                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2057                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2058                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2059                             wh, NULL, "%s", "not for us");
2060                         vap->iv_stats.is_rx_mgtdiscard++;
2061                 } else if (vap->iv_state != IEEE80211_S_RUN) {
2062                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2063                             wh, NULL, "wrong state %s",
2064                             ieee80211_state_name[vap->iv_state]);
2065                         vap->iv_stats.is_rx_mgtdiscard++;
2066                 } else {
2067                         if (ieee80211_parse_action(ni, m0) == 0)
2068                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2069                 }
2070                 break;
2071
2072         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2073         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2074         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2075         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2076         case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2077         case IEEE80211_FC0_SUBTYPE_ATIM:
2078         case IEEE80211_FC0_SUBTYPE_DISASSOC:
2079         case IEEE80211_FC0_SUBTYPE_AUTH:
2080         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2081                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2082                     wh, NULL, "%s", "not handled");
2083                 vap->iv_stats.is_rx_mgtdiscard++;
2084                 break;
2085
2086         default:
2087                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2088                     wh, "mgt", "subtype 0x%x not handled", subtype);
2089                 vap->iv_stats.is_rx_badsubtype++;
2090                 break;
2091         }
2092 }
2093
2094 static void
2095 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2096 {
2097
2098         switch (subtype) {
2099         case IEEE80211_FC0_SUBTYPE_BAR:
2100                 ieee80211_recv_bar(ni, m);
2101                 break;
2102         }
2103 }
2104
2105 /*
2106  * Parse meshpeering action ie's for MPM frames
2107  */
2108 static const struct ieee80211_meshpeer_ie *
2109 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2110         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
2111         const uint8_t *frm, const uint8_t *efrm,
2112         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2113 {
2114         struct ieee80211vap *vap = ni->ni_vap;
2115         const struct ieee80211_meshpeer_ie *mpie;
2116         uint16_t args[3];
2117         const uint8_t *meshid, *meshconf;
2118         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2119
2120         meshid = meshconf = NULL;
2121         while (efrm - frm > 1) {
2122                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2123                 switch (*frm) {
2124                 case IEEE80211_ELEMID_MESHID:
2125                         meshid = frm;
2126                         break;
2127                 case IEEE80211_ELEMID_MESHCONF:
2128                         meshconf = frm;
2129                         break;
2130                 case IEEE80211_ELEMID_MESHPEER:
2131                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
2132                         memset(mp, 0, sizeof(*mp));
2133                         mp->peer_len = mpie->peer_len;
2134                         mp->peer_proto = le16dec(&mpie->peer_proto);
2135                         mp->peer_llinkid = le16dec(&mpie->peer_llinkid);
2136                         switch (subtype) {
2137                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2138                                 mp->peer_linkid =
2139                                     le16dec(&mpie->peer_linkid);
2140                                 break;
2141                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
2142                                 /* NB: peer link ID is optional */
2143                                 if (mpie->peer_len ==
2144                                     (IEEE80211_MPM_BASE_SZ + 2)) {
2145                                         mp->peer_linkid = 0;
2146                                         mp->peer_rcode =
2147                                             le16dec(&mpie->peer_linkid);
2148                                 } else {
2149                                         mp->peer_linkid =
2150                                             le16dec(&mpie->peer_linkid);
2151                                         mp->peer_rcode =
2152                                             le16dec(&mpie->peer_rcode);
2153                                 }
2154                                 break;
2155                         }
2156                         break;
2157                 }
2158                 frm += frm[1] + 2;
2159         }
2160
2161         /*
2162          * Verify the contents of the frame.
2163          * If it fails validation, close the peer link.
2164          */
2165         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2166                 sendclose = 1;
2167                 IEEE80211_DISCARD(vap,
2168                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2169                     wh, NULL, "%s", "MPM validation failed");
2170         }
2171
2172         /* If meshid is not the same reject any frames type. */
2173         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2174                 sendclose = 1;
2175                 IEEE80211_DISCARD(vap,
2176                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2177                     wh, NULL, "%s", "not for our mesh");
2178                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2179                         /*
2180                          * Standard not clear about this, if we dont ignore
2181                          * there will be an endless loop between nodes sending
2182                          * CLOSE frames between each other with wrong meshid.
2183                          * Discard and timers will bring FSM to IDLE state.
2184                          */
2185                         return NULL;
2186                 }
2187         }
2188
2189         /*
2190          * Close frames are accepted if meshid is the same.
2191          * Verify the other two types.
2192          */
2193         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2194             mesh_verify_meshconf(vap, meshconf)) {
2195                 sendclose = 1;
2196                 IEEE80211_DISCARD(vap,
2197                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2198                     wh, NULL, "%s", "configuration missmatch");
2199         }
2200
2201         if (sendclose) {
2202                 vap->iv_stats.is_rx_mgtdiscard++;
2203                 switch (ni->ni_mlstate) {
2204                 case IEEE80211_NODE_MESH_IDLE:
2205                 case IEEE80211_NODE_MESH_ESTABLISHED:
2206                 case IEEE80211_NODE_MESH_HOLDING:
2207                         /* ignore */
2208                         break;
2209                 case IEEE80211_NODE_MESH_OPENSNT:
2210                 case IEEE80211_NODE_MESH_OPENRCV:
2211                 case IEEE80211_NODE_MESH_CONFIRMRCV:
2212                         args[0] = ni->ni_mlpid;
2213                         args[1] = ni->ni_mllid;
2214                         /* Reason codes for rejection */
2215                         switch (subtype) {
2216                         case IEEE80211_ACTION_MESHPEERING_OPEN:
2217                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2218                                 break;
2219                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2220                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2221                                 break;
2222                         }
2223                         ieee80211_send_action(ni,
2224                             IEEE80211_ACTION_CAT_SELF_PROT,
2225                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2226                             args);
2227                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2228                         mesh_peer_timeout_setup(ni);
2229                         break;
2230                 }
2231                 return NULL;
2232         }
2233
2234         return (const struct ieee80211_meshpeer_ie *) mp;
2235 }
2236
2237 static int
2238 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2239         const struct ieee80211_frame *wh,
2240         const uint8_t *frm, const uint8_t *efrm)
2241 {
2242         struct ieee80211vap *vap = ni->ni_vap;
2243         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2244         struct ieee80211_meshpeer_ie ie;
2245         const struct ieee80211_meshpeer_ie *meshpeer;
2246         uint16_t args[3];
2247
2248         /* +2+2 for action + code + capabilites */
2249         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2250             IEEE80211_ACTION_MESHPEERING_OPEN);
2251         if (meshpeer == NULL) {
2252                 return 0;
2253         }
2254
2255         /* XXX move up */
2256         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2257             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2258
2259         switch (ni->ni_mlstate) {
2260         case IEEE80211_NODE_MESH_IDLE:
2261                 /* Reject open request if reached our maximum neighbor count */
2262                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2263                         args[0] = meshpeer->peer_llinkid;
2264                         args[1] = 0;
2265                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2266                         ieee80211_send_action(ni,
2267                             IEEE80211_ACTION_CAT_SELF_PROT,
2268                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2269                             args);
2270                         /* stay in IDLE state */
2271                         return (0);
2272                 }
2273                 /* Open frame accepted */
2274                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2275                 ni->ni_mllid = meshpeer->peer_llinkid;
2276                 ni->ni_mlpid = mesh_generateid(vap);
2277                 if (ni->ni_mlpid == 0)
2278                         return 0;               /* XXX */
2279                 args[0] = ni->ni_mlpid;
2280                 /* Announce we're open too... */
2281                 ieee80211_send_action(ni,
2282                     IEEE80211_ACTION_CAT_SELF_PROT,
2283                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
2284                 /* ...and confirm the link. */
2285                 args[0] = ni->ni_mlpid;
2286                 args[1] = ni->ni_mllid;
2287                 ieee80211_send_action(ni,
2288                     IEEE80211_ACTION_CAT_SELF_PROT,
2289                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2290                     args);
2291                 mesh_peer_timeout_setup(ni);
2292                 break;
2293         case IEEE80211_NODE_MESH_OPENRCV:
2294                 /* Wrong Link ID */
2295                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2296                         args[0] = ni->ni_mllid;
2297                         args[1] = ni->ni_mlpid;
2298                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2299                         ieee80211_send_action(ni,
2300                             IEEE80211_ACTION_CAT_SELF_PROT,
2301                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2302                             args);
2303                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2304                         mesh_peer_timeout_setup(ni);
2305                         break;
2306                 }
2307                 /* Duplicate open, confirm again. */
2308                 args[0] = ni->ni_mlpid;
2309                 args[1] = ni->ni_mllid;
2310                 ieee80211_send_action(ni,
2311                     IEEE80211_ACTION_CAT_SELF_PROT,
2312                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2313                     args);
2314                 break;
2315         case IEEE80211_NODE_MESH_OPENSNT:
2316                 ni->ni_mllid = meshpeer->peer_llinkid;
2317                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2318                 args[0] = ni->ni_mlpid;
2319                 args[1] = ni->ni_mllid;
2320                 ieee80211_send_action(ni,
2321                     IEEE80211_ACTION_CAT_SELF_PROT,
2322                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2323                     args);
2324                 /* NB: don't setup/clear any timeout */
2325                 break;
2326         case IEEE80211_NODE_MESH_CONFIRMRCV:
2327                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2328                     ni->ni_mllid != meshpeer->peer_llinkid) {
2329                         args[0] = ni->ni_mlpid;
2330                         args[1] = ni->ni_mllid;
2331                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2332                         ieee80211_send_action(ni,
2333                             IEEE80211_ACTION_CAT_SELF_PROT,
2334                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2335                             args);
2336                         mesh_linkchange(ni,
2337                             IEEE80211_NODE_MESH_HOLDING);
2338                         mesh_peer_timeout_setup(ni);
2339                         break;
2340                 }
2341                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2342                 ni->ni_mllid = meshpeer->peer_llinkid;
2343                 args[0] = ni->ni_mlpid;
2344                 args[1] = ni->ni_mllid;
2345                 ieee80211_send_action(ni,
2346                     IEEE80211_ACTION_CAT_SELF_PROT,
2347                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2348                     args);
2349                 mesh_peer_timeout_stop(ni);
2350                 break;
2351         case IEEE80211_NODE_MESH_ESTABLISHED:
2352                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2353                         args[0] = ni->ni_mllid;
2354                         args[1] = ni->ni_mlpid;
2355                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2356                         ieee80211_send_action(ni,
2357                             IEEE80211_ACTION_CAT_SELF_PROT,
2358                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2359                             args);
2360                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2361                         mesh_peer_timeout_setup(ni);
2362                         break;
2363                 }
2364                 args[0] = ni->ni_mlpid;
2365                 args[1] = ni->ni_mllid;
2366                 ieee80211_send_action(ni,
2367                     IEEE80211_ACTION_CAT_SELF_PROT,
2368                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2369                     args);
2370                 break;
2371         case IEEE80211_NODE_MESH_HOLDING:
2372                 args[0] = ni->ni_mlpid;
2373                 args[1] = meshpeer->peer_llinkid;
2374                 /* Standard not clear about what the reaason code should be */
2375                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2376                 ieee80211_send_action(ni,
2377                     IEEE80211_ACTION_CAT_SELF_PROT,
2378                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2379                     args);
2380                 break;
2381         }
2382         return 0;
2383 }
2384
2385 static int
2386 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2387         const struct ieee80211_frame *wh,
2388         const uint8_t *frm, const uint8_t *efrm)
2389 {
2390         struct ieee80211vap *vap = ni->ni_vap;
2391         struct ieee80211_meshpeer_ie ie;
2392         const struct ieee80211_meshpeer_ie *meshpeer;
2393         uint16_t args[3];
2394
2395         /* +2+2+2+2 for action + code + capabilites + status code + AID */
2396         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2397             IEEE80211_ACTION_MESHPEERING_CONFIRM);
2398         if (meshpeer == NULL) {
2399                 return 0;
2400         }
2401
2402         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2403             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2404             meshpeer->peer_llinkid, meshpeer->peer_linkid);
2405
2406         switch (ni->ni_mlstate) {
2407         case IEEE80211_NODE_MESH_OPENRCV:
2408                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2409                 mesh_peer_timeout_stop(ni);
2410                 break;
2411         case IEEE80211_NODE_MESH_OPENSNT:
2412                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2413                 mesh_peer_timeout_setup(ni);
2414                 break;
2415         case IEEE80211_NODE_MESH_HOLDING:
2416                 args[0] = ni->ni_mlpid;
2417                 args[1] = meshpeer->peer_llinkid;
2418                 /* Standard not clear about what the reaason code should be */
2419                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2420                 ieee80211_send_action(ni,
2421                     IEEE80211_ACTION_CAT_SELF_PROT,
2422                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2423                     args);
2424                 break;
2425         case IEEE80211_NODE_MESH_CONFIRMRCV:
2426                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2427                         args[0] = ni->ni_mlpid;
2428                         args[1] = ni->ni_mllid;
2429                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2430                         ieee80211_send_action(ni,
2431                             IEEE80211_ACTION_CAT_SELF_PROT,
2432                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2433                             args);
2434                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2435                         mesh_peer_timeout_setup(ni);
2436                 }
2437                 break;
2438         default:
2439                 IEEE80211_DISCARD(vap,
2440                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2441                     wh, NULL, "received confirm in invalid state %d",
2442                     ni->ni_mlstate);
2443                 vap->iv_stats.is_rx_mgtdiscard++;
2444                 break;
2445         }
2446         return 0;
2447 }
2448
2449 static int
2450 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2451         const struct ieee80211_frame *wh,
2452         const uint8_t *frm, const uint8_t *efrm)
2453 {
2454         struct ieee80211_meshpeer_ie ie;
2455         const struct ieee80211_meshpeer_ie *meshpeer;
2456         uint16_t args[3];
2457
2458         /* +2 for action + code */
2459         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2460             IEEE80211_ACTION_MESHPEERING_CLOSE);
2461         if (meshpeer == NULL) {
2462                 return 0;
2463         }
2464
2465         /*
2466          * XXX: check reason code, for example we could receive
2467          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2468          * to peer again.
2469          */
2470
2471         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2472             ni, "%s", "recv PEER CLOSE");
2473
2474         switch (ni->ni_mlstate) {
2475         case IEEE80211_NODE_MESH_IDLE:
2476                 /* ignore */
2477                 break;
2478         case IEEE80211_NODE_MESH_OPENRCV:
2479         case IEEE80211_NODE_MESH_OPENSNT:
2480         case IEEE80211_NODE_MESH_CONFIRMRCV:
2481         case IEEE80211_NODE_MESH_ESTABLISHED:
2482                 args[0] = ni->ni_mlpid;
2483                 args[1] = ni->ni_mllid;
2484                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2485                 ieee80211_send_action(ni,
2486                     IEEE80211_ACTION_CAT_SELF_PROT,
2487                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2488                     args);
2489                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2490                 mesh_peer_timeout_setup(ni);
2491                 break;
2492         case IEEE80211_NODE_MESH_HOLDING:
2493                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2494                 mesh_peer_timeout_stop(ni);
2495                 break;
2496         }
2497         return 0;
2498 }
2499
2500 /*
2501  * Link Metric handling.
2502  */
2503 static int
2504 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2505         const struct ieee80211_frame *wh,
2506         const uint8_t *frm, const uint8_t *efrm)
2507 {
2508         const struct ieee80211_meshlmetric_ie *ie =
2509             (const struct ieee80211_meshlmetric_ie *)
2510             (frm+2); /* action + code */
2511         struct ieee80211_meshlmetric_ie lm_rep;
2512
2513         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2514                 lm_rep.lm_flags = 0;
2515                 lm_rep.lm_metric = mesh_airtime_calc(ni);
2516                 ieee80211_send_action(ni,
2517                     IEEE80211_ACTION_CAT_MESH,
2518                     IEEE80211_ACTION_MESH_LMETRIC,
2519                     &lm_rep);
2520         }
2521         /* XXX: else do nothing for now */
2522         return 0;
2523 }
2524
2525 /*
2526  * Parse meshgate action ie's for GANN frames.
2527  * Returns -1 if parsing fails, otherwise 0.
2528  */
2529 static int
2530 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2531     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
2532     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2533 {
2534         struct ieee80211vap *vap = ni->ni_vap;
2535         const struct ieee80211_meshgann_ie *gannie;
2536
2537         while (efrm - frm > 1) {
2538                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2539                 switch (*frm) {
2540                 case IEEE80211_ELEMID_MESHGANN:
2541                         gannie = (const struct ieee80211_meshgann_ie *) frm;
2542                         memset(ie, 0, sizeof(*ie));
2543                         ie->gann_ie = gannie->gann_ie;
2544                         ie->gann_len = gannie->gann_len;
2545                         ie->gann_flags = gannie->gann_flags;
2546                         ie->gann_hopcount = gannie->gann_hopcount;
2547                         ie->gann_ttl = gannie->gann_ttl;
2548                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2549                         ie->gann_seq = le32dec(&gannie->gann_seq);
2550                         ie->gann_interval = le16dec(&gannie->gann_interval);
2551                         break;
2552                 }
2553                 frm += frm[1] + 2;
2554         }
2555
2556         return 0;
2557 }
2558
2559 /*
2560  * Mesh Gate Announcement handling.
2561  */
2562 static int
2563 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2564         const struct ieee80211_frame *wh,
2565         const uint8_t *frm, const uint8_t *efrm)
2566 {
2567         struct ieee80211vap *vap = ni->ni_vap;
2568         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2569         struct ieee80211_mesh_gate_route *gr, *next;
2570         struct ieee80211_mesh_route *rt_gate;
2571         struct ieee80211_meshgann_ie pgann;
2572         struct ieee80211_meshgann_ie ie;
2573         int found = 0;
2574
2575         /* +2 for action + code */
2576         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2577                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2578                     ni->ni_macaddr, NULL, "%s",
2579                     "GANN parsing failed");
2580                 vap->iv_stats.is_rx_mgtdiscard++;
2581                 return (0);
2582         }
2583
2584         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2585                 return 0;
2586
2587         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2588             "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2589             ie.gann_seq);
2590
2591         if (ms == NULL)
2592                 return (0);
2593         MESH_RT_LOCK(ms);
2594         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2595                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2596                         continue;
2597                 if (ie.gann_seq <= gr->gr_lastseq) {
2598                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2599                             ni->ni_macaddr, NULL,
2600                             "GANN old seqno %u <= %u",
2601                             ie.gann_seq, gr->gr_lastseq);
2602                         MESH_RT_UNLOCK(ms);
2603                         return (0);
2604                 }
2605                 /* corresponding mesh gate found & GANN accepted */
2606                 found = 1;
2607                 break;
2608         }
2609         if (found == 0) {
2610                 /* this GANN is from a new mesh Gate add it to known table. */
2611                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2612                     "stored new GANN information, seq %u.", ie.gann_seq);
2613                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2614                     M_80211_MESH_GT_RT,
2615                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2616                 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2617                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2618         }
2619         gr->gr_lastseq = ie.gann_seq;
2620
2621         /* check if we have a path to this gate */
2622         rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2623         if (rt_gate != NULL &&
2624             rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2625                 gr->gr_route = rt_gate;
2626                 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2627         }
2628
2629         MESH_RT_UNLOCK(ms);
2630
2631         /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2632         if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2633                 return 0;
2634         pgann.gann_flags = ie.gann_flags; /* Reserved */
2635         pgann.gann_hopcount = ie.gann_hopcount + 1;
2636         pgann.gann_ttl = ie.gann_ttl - 1;
2637         IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2638         pgann.gann_seq = ie.gann_seq;
2639         pgann.gann_interval = ie.gann_interval;
2640
2641         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2642             "%s", "propagate GANN");
2643
2644         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2645             IEEE80211_ACTION_MESH_GANN, &pgann);
2646
2647         return 0;
2648 }
2649
2650 static int
2651 mesh_send_action(struct ieee80211_node *ni,
2652     const uint8_t sa[IEEE80211_ADDR_LEN],
2653     const uint8_t da[IEEE80211_ADDR_LEN],
2654     struct mbuf *m)
2655 {
2656         struct ieee80211vap *vap = ni->ni_vap;
2657         struct ieee80211com *ic = ni->ni_ic;
2658         struct ieee80211_bpf_params params;
2659         int ret;
2660
2661         KASSERT(ni != NULL, ("null node"));
2662
2663         if (vap->iv_state == IEEE80211_S_CAC) {
2664                 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2665                     "block %s frame in CAC state", "Mesh action");
2666                 vap->iv_stats.is_tx_badstate++;
2667                 ieee80211_free_node(ni);
2668                 m_freem(m);
2669                 return EIO;             /* XXX */
2670         }
2671
2672         M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2673         if (m == NULL) {
2674                 ieee80211_free_node(ni);
2675                 return ENOMEM;
2676         }
2677
2678         IEEE80211_TX_LOCK(ic);
2679         ieee80211_send_setup(ni, m,
2680              IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2681              IEEE80211_NONQOS_TID, sa, da, sa);
2682         m->m_flags |= M_ENCAP;          /* mark encapsulated */
2683
2684         memset(&params, 0, sizeof(params));
2685         params.ibp_pri = WME_AC_VO;
2686         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2687         if (IEEE80211_IS_MULTICAST(da))
2688                 params.ibp_try0 = 1;
2689         else
2690                 params.ibp_try0 = ni->ni_txparms->maxretry;
2691         params.ibp_power = ni->ni_txpower;
2692
2693         IEEE80211_NODE_STAT(ni, tx_mgmt);
2694
2695         ret = ieee80211_raw_output(vap, ni, m, &params);
2696         IEEE80211_TX_UNLOCK(ic);
2697         return (ret);
2698 }
2699
2700 #define ADDSHORT(frm, v) do {                   \
2701         frm[0] = (v) & 0xff;                    \
2702         frm[1] = (v) >> 8;                      \
2703         frm += 2;                               \
2704 } while (0)
2705 #define ADDWORD(frm, v) do {                    \
2706         frm[0] = (v) & 0xff;                    \
2707         frm[1] = ((v) >> 8) & 0xff;             \
2708         frm[2] = ((v) >> 16) & 0xff;            \
2709         frm[3] = ((v) >> 24) & 0xff;            \
2710         frm += 4;                               \
2711 } while (0)
2712
2713 static int
2714 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2715         int category, int action, void *args0)
2716 {
2717         struct ieee80211vap *vap = ni->ni_vap;
2718         struct ieee80211com *ic = ni->ni_ic;
2719         uint16_t *args = args0;
2720         const struct ieee80211_rateset *rs;
2721         struct mbuf *m;
2722         uint8_t *frm;
2723
2724         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2725             "send PEER OPEN action: localid 0x%x", args[0]);
2726
2727         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2728             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2729             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2730         ieee80211_ref_node(ni);
2731
2732         m = ieee80211_getmgtframe(&frm,
2733             ic->ic_headroom + sizeof(struct ieee80211_frame),
2734             sizeof(uint16_t)    /* action+category */
2735             + sizeof(uint16_t)  /* capabilites */
2736             + 2 + IEEE80211_RATE_SIZE
2737             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2738             + 2 + IEEE80211_MESHID_LEN
2739             + sizeof(struct ieee80211_meshconf_ie)
2740             + sizeof(struct ieee80211_meshpeer_ie)
2741         );
2742         if (m != NULL) {
2743                 /*
2744                  * mesh peer open action frame format:
2745                  *   [1] category
2746                  *   [1] action
2747                  *   [2] capabilities
2748                  *   [tlv] rates
2749                  *   [tlv] xrates
2750                  *   [tlv] mesh id
2751                  *   [tlv] mesh conf
2752                  *   [tlv] mesh peer link mgmt
2753                  */
2754                 *frm++ = category;
2755                 *frm++ = action;
2756                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2757                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2758                 frm = ieee80211_add_rates(frm, rs);
2759                 frm = ieee80211_add_xrates(frm, rs);
2760                 frm = ieee80211_add_meshid(frm, vap);
2761                 frm = ieee80211_add_meshconf(frm, vap);
2762                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2763                     args[0], 0, 0);
2764                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2765                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2766         } else {
2767                 vap->iv_stats.is_tx_nobuf++;
2768                 ieee80211_free_node(ni);
2769                 return ENOMEM;
2770         }
2771 }
2772
2773 static int
2774 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2775         int category, int action, void *args0)
2776 {
2777         struct ieee80211vap *vap = ni->ni_vap;
2778         struct ieee80211com *ic = ni->ni_ic;
2779         uint16_t *args = args0;
2780         const struct ieee80211_rateset *rs;
2781         struct mbuf *m;
2782         uint8_t *frm;
2783
2784         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2785             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2786             args[0], args[1]);
2787
2788         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2789             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2790             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2791         ieee80211_ref_node(ni);
2792
2793         m = ieee80211_getmgtframe(&frm,
2794             ic->ic_headroom + sizeof(struct ieee80211_frame),
2795             sizeof(uint16_t)    /* action+category */
2796             + sizeof(uint16_t)  /* capabilites */
2797             + sizeof(uint16_t)  /* status code */
2798             + sizeof(uint16_t)  /* AID */
2799             + 2 + IEEE80211_RATE_SIZE
2800             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2801             + 2 + IEEE80211_MESHID_LEN
2802             + sizeof(struct ieee80211_meshconf_ie)
2803             + sizeof(struct ieee80211_meshpeer_ie)
2804         );
2805         if (m != NULL) {
2806                 /*
2807                  * mesh peer confirm action frame format:
2808                  *   [1] category
2809                  *   [1] action
2810                  *   [2] capabilities
2811                  *   [2] status code
2812                  *   [2] association id (peer ID)
2813                  *   [tlv] rates
2814                  *   [tlv] xrates
2815                  *   [tlv] mesh id
2816                  *   [tlv] mesh conf
2817                  *   [tlv] mesh peer link mgmt
2818                  */
2819                 *frm++ = category;
2820                 *frm++ = action;
2821                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2822                 ADDSHORT(frm, 0);               /* status code */
2823                 ADDSHORT(frm, args[1]);         /* AID */
2824                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2825                 frm = ieee80211_add_rates(frm, rs);
2826                 frm = ieee80211_add_xrates(frm, rs);
2827                 frm = ieee80211_add_meshid(frm, vap);
2828                 frm = ieee80211_add_meshconf(frm, vap);
2829                 frm = ieee80211_add_meshpeer(frm,
2830                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2831                     args[0], args[1], 0);
2832                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2833                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2834         } else {
2835                 vap->iv_stats.is_tx_nobuf++;
2836                 ieee80211_free_node(ni);
2837                 return ENOMEM;
2838         }
2839 }
2840
2841 static int
2842 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2843         int category, int action, void *args0)
2844 {
2845         struct ieee80211vap *vap = ni->ni_vap;
2846         struct ieee80211com *ic = ni->ni_ic;
2847         uint16_t *args = args0;
2848         struct mbuf *m;
2849         uint8_t *frm;
2850
2851         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2852             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)",
2853             args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
2854
2855         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2856             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2857             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2858         ieee80211_ref_node(ni);
2859
2860         m = ieee80211_getmgtframe(&frm,
2861             ic->ic_headroom + sizeof(struct ieee80211_frame),
2862             sizeof(uint16_t)    /* action+category */
2863             + sizeof(uint16_t)  /* reason code */
2864             + 2 + IEEE80211_MESHID_LEN
2865             + sizeof(struct ieee80211_meshpeer_ie)
2866         );
2867         if (m != NULL) {
2868                 /*
2869                  * mesh peer close action frame format:
2870                  *   [1] category
2871                  *   [1] action
2872                  *   [tlv] mesh id
2873                  *   [tlv] mesh peer link mgmt
2874                  */
2875                 *frm++ = category;
2876                 *frm++ = action;
2877                 frm = ieee80211_add_meshid(frm, vap);
2878                 frm = ieee80211_add_meshpeer(frm,
2879                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2880                     args[0], args[1], args[2]);
2881                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2882                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2883         } else {
2884                 vap->iv_stats.is_tx_nobuf++;
2885                 ieee80211_free_node(ni);
2886                 return ENOMEM;
2887         }
2888 }
2889
2890 static int
2891 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2892         int category, int action, void *arg0)
2893 {
2894         struct ieee80211vap *vap = ni->ni_vap;
2895         struct ieee80211com *ic = ni->ni_ic;
2896         struct ieee80211_meshlmetric_ie *ie = arg0;
2897         struct mbuf *m;
2898         uint8_t *frm;
2899
2900         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2901                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2902                     ni, "%s", "send LINK METRIC REQUEST action");
2903         } else {
2904                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2905                     ni, "send LINK METRIC REPLY action: metric 0x%x",
2906                     ie->lm_metric);
2907         }
2908         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2909             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2910             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2911         ieee80211_ref_node(ni);
2912
2913         m = ieee80211_getmgtframe(&frm,
2914             ic->ic_headroom + sizeof(struct ieee80211_frame),
2915             sizeof(uint16_t) +  /* action+category */
2916             sizeof(struct ieee80211_meshlmetric_ie)
2917         );
2918         if (m != NULL) {
2919                 /*
2920                  * mesh link metric
2921                  *   [1] category
2922                  *   [1] action
2923                  *   [tlv] mesh link metric
2924                  */
2925                 *frm++ = category;
2926                 *frm++ = action;
2927                 frm = ieee80211_add_meshlmetric(frm,
2928                     ie->lm_flags, ie->lm_metric);
2929                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2930                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2931         } else {
2932                 vap->iv_stats.is_tx_nobuf++;
2933                 ieee80211_free_node(ni);
2934                 return ENOMEM;
2935         }
2936 }
2937
2938 static int
2939 mesh_send_action_meshgate(struct ieee80211_node *ni,
2940         int category, int action, void *arg0)
2941 {
2942         struct ieee80211vap *vap = ni->ni_vap;
2943         struct ieee80211com *ic = ni->ni_ic;
2944         struct ieee80211_meshgann_ie *ie = arg0;
2945         struct mbuf *m;
2946         uint8_t *frm;
2947
2948         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2949             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2950             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2951         ieee80211_ref_node(ni);
2952
2953         m = ieee80211_getmgtframe(&frm,
2954             ic->ic_headroom + sizeof(struct ieee80211_frame),
2955             sizeof(uint16_t) +  /* action+category */
2956             IEEE80211_MESHGANN_BASE_SZ
2957         );
2958         if (m != NULL) {
2959                 /*
2960                  * mesh link metric
2961                  *   [1] category
2962                  *   [1] action
2963                  *   [tlv] mesh gate annoucement
2964                  */
2965                 *frm++ = category;
2966                 *frm++ = action;
2967                 frm = ieee80211_add_meshgate(frm, ie);
2968                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2969                 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2970         } else {
2971                 vap->iv_stats.is_tx_nobuf++;
2972                 ieee80211_free_node(ni);
2973                 return ENOMEM;
2974         }
2975 }
2976
2977 static void
2978 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2979 {
2980         switch (ni->ni_mlstate) {
2981         case IEEE80211_NODE_MESH_HOLDING:
2982                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2983                 break;
2984         case IEEE80211_NODE_MESH_CONFIRMRCV:
2985                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2986                 break;
2987         case IEEE80211_NODE_MESH_IDLE:
2988                 ni->ni_mltval = 0;
2989                 break;
2990         default:
2991                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
2992                 break;
2993         }
2994         if (ni->ni_mltval)
2995                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2996                     mesh_peer_timeout_cb, ni);
2997 }
2998
2999 /*
3000  * Same as above but backoffs timer statisically 50%.
3001  */
3002 static void
3003 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3004 {
3005         uint32_t r;
3006
3007         r = arc4random();
3008         ni->ni_mltval += r % ni->ni_mltval;
3009         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3010             ni);
3011 }
3012
3013 static __inline void
3014 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3015 {
3016         callout_drain(&ni->ni_mltimer);
3017 }
3018
3019 static void
3020 mesh_peer_backoff_cb(void *arg)
3021 {
3022         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3023
3024         /* After backoff timeout, try to peer automatically again. */
3025         ni->ni_mlhcnt = 0;
3026 }
3027
3028 /*
3029  * Mesh Peer Link Management FSM timeout handling.
3030  */
3031 static void
3032 mesh_peer_timeout_cb(void *arg)
3033 {
3034         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3035         uint16_t args[3];
3036
3037         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3038             ni, "mesh link timeout, state %d, retry counter %d",
3039             ni->ni_mlstate, ni->ni_mlrcnt);
3040
3041         switch (ni->ni_mlstate) {
3042         case IEEE80211_NODE_MESH_IDLE:
3043         case IEEE80211_NODE_MESH_ESTABLISHED:
3044                 break;
3045         case IEEE80211_NODE_MESH_OPENSNT:
3046         case IEEE80211_NODE_MESH_OPENRCV:
3047                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3048                         args[0] = ni->ni_mlpid;
3049                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3050                         ieee80211_send_action(ni,
3051                             IEEE80211_ACTION_CAT_SELF_PROT,
3052                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3053                         ni->ni_mlrcnt = 0;
3054                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3055                         mesh_peer_timeout_setup(ni);
3056                 } else {
3057                         args[0] = ni->ni_mlpid;
3058                         ieee80211_send_action(ni,
3059                             IEEE80211_ACTION_CAT_SELF_PROT,
3060                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
3061                         ni->ni_mlrcnt++;
3062                         mesh_peer_timeout_backoff(ni);
3063                 }
3064                 break;
3065         case IEEE80211_NODE_MESH_CONFIRMRCV:
3066                 args[0] = ni->ni_mlpid;
3067                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3068                 ieee80211_send_action(ni,
3069                     IEEE80211_ACTION_CAT_SELF_PROT,
3070                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3071                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3072                 mesh_peer_timeout_setup(ni);
3073                 break;
3074         case IEEE80211_NODE_MESH_HOLDING:
3075                 ni->ni_mlhcnt++;
3076                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3077                         callout_reset(&ni->ni_mlhtimer,
3078                             ieee80211_mesh_backofftimeout,
3079                             mesh_peer_backoff_cb, ni);
3080                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3081                 break;
3082         }
3083 }
3084
3085 static int
3086 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3087 {
3088         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3089
3090         if (ie == NULL || ie[1] != ms->ms_idlen)
3091                 return 1;
3092         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3093 }
3094
3095 /*
3096  * Check if we are using the same algorithms for this mesh.
3097  */
3098 static int
3099 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3100 {
3101         const struct ieee80211_meshconf_ie *meshconf =
3102             (const struct ieee80211_meshconf_ie *) ie;
3103         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3104
3105         if (meshconf == NULL)
3106                 return 1;
3107         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3108                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3109                     "unknown path selection algorithm: 0x%x\n",
3110                     meshconf->conf_pselid);
3111                 return 1;
3112         }
3113         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3114                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3115                     "unknown path metric algorithm: 0x%x\n",
3116                     meshconf->conf_pmetid);
3117                 return 1;
3118         }
3119         if (meshconf->conf_ccid != 0) {
3120                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3121                     "unknown congestion control algorithm: 0x%x\n",
3122                     meshconf->conf_ccid);
3123                 return 1;
3124         }
3125         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3126                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3127                     "unknown sync algorithm: 0x%x\n",
3128                     meshconf->conf_syncid);
3129                 return 1;
3130         }
3131         if (meshconf->conf_authid != 0) {
3132                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3133                     "unknown auth auth algorithm: 0x%x\n",
3134                     meshconf->conf_pselid);
3135                 return 1;
3136         }
3137         /* Not accepting peers */
3138         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3139                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3140                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
3141                 return 1;
3142         }
3143         return 0;
3144 }
3145
3146 static int
3147 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3148     const uint8_t *ie)
3149 {
3150         const struct ieee80211_meshpeer_ie *meshpeer =
3151             (const struct ieee80211_meshpeer_ie *) ie;
3152
3153         if (meshpeer == NULL ||
3154             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3155             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3156                 return 1;
3157         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3158                 IEEE80211_DPRINTF(vap,
3159                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3160                     "Only MPM protocol is supported (proto: 0x%02X)",
3161                     meshpeer->peer_proto);
3162                 return 1;
3163         }
3164         switch (subtype) {
3165         case IEEE80211_ACTION_MESHPEERING_OPEN:
3166                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3167                         return 1;
3168                 break;
3169         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3170                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3171                         return 1;
3172                 break;
3173         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3174                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3175                         return 1;
3176                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3177                     meshpeer->peer_linkid != 0)
3178                         return 1;
3179                 if (meshpeer->peer_rcode == 0)
3180                         return 1;
3181                 break;
3182         }
3183         return 0;
3184 }
3185
3186 /*
3187  * Add a Mesh ID IE to a frame.
3188  */
3189 uint8_t *
3190 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3191 {
3192         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3193
3194         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3195
3196         *frm++ = IEEE80211_ELEMID_MESHID;
3197         *frm++ = ms->ms_idlen;
3198         memcpy(frm, ms->ms_id, ms->ms_idlen);
3199         return frm + ms->ms_idlen;
3200 }
3201
3202 /*
3203  * Add a Mesh Configuration IE to a frame.
3204  * For now just use HWMP routing, Airtime link metric, Null Congestion
3205  * Signaling, Null Sync Protocol and Null Authentication.
3206  */
3207 uint8_t *
3208 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3209 {
3210         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3211         uint16_t caps;
3212
3213         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3214
3215         *frm++ = IEEE80211_ELEMID_MESHCONF;
3216         *frm++ = IEEE80211_MESH_CONF_SZ;
3217         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
3218         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
3219         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3220         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3221         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3222         /* NB: set the number of neighbors before the rest */
3223         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3224             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3225         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3226                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3227         frm += 1;
3228         caps = 0;
3229         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3230                 caps |= IEEE80211_MESHCONF_CAP_AP;
3231         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3232                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3233         *frm++ = caps;
3234         return frm;
3235 }
3236
3237 /*
3238  * Add a Mesh Peer Management IE to a frame.
3239  */
3240 uint8_t *
3241 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3242     uint16_t peerid, uint16_t reason)
3243 {
3244
3245         KASSERT(localid != 0, ("localid == 0"));
3246
3247         *frm++ = IEEE80211_ELEMID_MESHPEER;
3248         switch (subtype) {
3249         case IEEE80211_ACTION_MESHPEERING_OPEN:
3250                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
3251                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3252                 ADDSHORT(frm, localid);                 /* local ID */
3253                 break;
3254         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3255                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3256                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
3257                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3258                 ADDSHORT(frm, localid);                 /* local ID */
3259                 ADDSHORT(frm, peerid);                  /* peer ID */
3260                 break;
3261         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3262                 if (peerid)
3263                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
3264                 else
3265                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3266                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3267                 ADDSHORT(frm, localid); /* local ID */
3268                 if (peerid)
3269                         ADDSHORT(frm, peerid);  /* peer ID */
3270                 ADDSHORT(frm, reason);
3271                 break;
3272         }
3273         return frm;
3274 }
3275
3276 /*
3277  * Compute an Airtime Link Metric for the link with this node.
3278  *
3279  * Based on Draft 3.0 spec (11B.10, p.149).
3280  */
3281 /*
3282  * Max 802.11s overhead.
3283  */
3284 #define IEEE80211_MESH_MAXOVERHEAD \
3285         (sizeof(struct ieee80211_qosframe_addr4) \
3286          + sizeof(struct ieee80211_meshcntl_ae10) \
3287         + sizeof(struct llc) \
3288         + IEEE80211_ADDR_LEN \
3289         + IEEE80211_WEP_IVLEN \
3290         + IEEE80211_WEP_KIDLEN \
3291         + IEEE80211_WEP_CRCLEN \
3292         + IEEE80211_WEP_MICLEN \
3293         + IEEE80211_CRC_LEN)
3294 uint32_t
3295 mesh_airtime_calc(struct ieee80211_node *ni)
3296 {
3297 #define M_BITS 8
3298 #define S_FACTOR (2 * M_BITS)
3299         struct ieee80211com *ic = ni->ni_ic;
3300         struct ifnet *ifp = ni->ni_vap->iv_ifp;
3301         const static int nbits = 8192 << M_BITS;
3302         uint32_t overhead, rate, errrate;
3303         uint64_t res;
3304
3305         /* Time to transmit a frame */
3306         rate = ni->ni_txrate;
3307         overhead = ieee80211_compute_duration(ic->ic_rt,
3308             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3309         /* Error rate in percentage */
3310         /* XXX assuming small failures are ok */
3311         errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
3312             ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
3313             / 100;
3314         res = (overhead + (nbits / rate)) *
3315             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3316
3317         return (uint32_t)(res >> S_FACTOR);
3318 #undef M_BITS
3319 #undef S_FACTOR
3320 }
3321
3322 /*
3323  * Add a Mesh Link Metric report IE to a frame.
3324  */
3325 uint8_t *
3326 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3327 {
3328         *frm++ = IEEE80211_ELEMID_MESHLINK;
3329         *frm++ = 5;
3330         *frm++ = flags;
3331         ADDWORD(frm, metric);
3332         return frm;
3333 }
3334
3335 /*
3336  * Add a Mesh Gate Announcement IE to a frame.
3337  */
3338 uint8_t *
3339 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3340 {
3341         *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3342         *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3343         *frm++ = ie->gann_flags;
3344         *frm++ = ie->gann_hopcount;
3345         *frm++ = ie->gann_ttl;
3346         IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3347         frm += 6;
3348         ADDWORD(frm, ie->gann_seq);
3349         ADDSHORT(frm, ie->gann_interval);
3350         return frm;
3351 }
3352 #undef ADDSHORT
3353 #undef ADDWORD
3354
3355 /*
3356  * Initialize any mesh-specific node state.
3357  */
3358 void
3359 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3360 {
3361         ni->ni_flags |= IEEE80211_NODE_QOS;
3362         callout_init(&ni->ni_mltimer, 1);
3363         callout_init(&ni->ni_mlhtimer, 1);
3364 }
3365
3366 /*
3367  * Cleanup any mesh-specific node state.
3368  */
3369 void
3370 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3371 {
3372         struct ieee80211vap *vap = ni->ni_vap;
3373         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3374
3375         callout_drain(&ni->ni_mltimer);
3376         callout_drain(&ni->ni_mlhtimer);
3377         /* NB: short-circuit callbacks after mesh_vdetach */
3378         if (vap->iv_mesh != NULL)
3379                 ms->ms_ppath->mpp_peerdown(ni);
3380 }
3381
3382 void
3383 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3384 {
3385         ni->ni_meshidlen = ie[1];
3386         memcpy(ni->ni_meshid, ie + 2, ie[1]);
3387 }
3388
3389 /*
3390  * Setup mesh-specific node state on neighbor discovery.
3391  */
3392 void
3393 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3394         const struct ieee80211_frame *wh,
3395         const struct ieee80211_scanparams *sp)
3396 {
3397         ieee80211_parse_meshid(ni, sp->meshid);
3398 }
3399
3400 void
3401 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3402         struct ieee80211_beacon_offsets *bo)
3403 {
3404         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3405
3406         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3407                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3408                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3409         }
3410 }
3411
3412 static int
3413 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3414 {
3415         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3416         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3417         struct ieee80211_mesh_route *rt;
3418         struct ieee80211req_mesh_route *imr;
3419         size_t len, off;
3420         uint8_t *p;
3421         int error;
3422
3423         if (vap->iv_opmode != IEEE80211_M_MBSS)
3424                 return ENOSYS;
3425
3426         error = 0;
3427         switch (ireq->i_type) {
3428         case IEEE80211_IOC_MESH_ID:
3429                 ireq->i_len = ms->ms_idlen;
3430                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3431                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3432                 break;
3433         case IEEE80211_IOC_MESH_AP:
3434                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3435                 break;
3436         case IEEE80211_IOC_MESH_FWRD:
3437                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3438                 break;
3439         case IEEE80211_IOC_MESH_GATE:
3440                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3441                 break;
3442         case IEEE80211_IOC_MESH_TTL:
3443                 ireq->i_val = ms->ms_ttl;
3444                 break;
3445         case IEEE80211_IOC_MESH_RTCMD:
3446                 switch (ireq->i_val) {
3447                 case IEEE80211_MESH_RTCMD_LIST:
3448                         len = 0;
3449                         MESH_RT_LOCK(ms);
3450                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3451                                 len += sizeof(*imr);
3452                         }
3453                         MESH_RT_UNLOCK(ms);
3454                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3455                                 ireq->i_len = len;
3456                                 return ENOMEM;
3457                         }
3458                         ireq->i_len = len;
3459                         /* XXX M_WAIT? */
3460                         p = IEEE80211_MALLOC(len, M_TEMP,
3461                             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
3462                         if (p == NULL)
3463                                 return ENOMEM;
3464                         off = 0;
3465                         MESH_RT_LOCK(ms);
3466                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3467                                 if (off >= len)
3468                                         break;
3469                                 imr = (struct ieee80211req_mesh_route *)
3470                                     (p + off);
3471                                 IEEE80211_ADDR_COPY(imr->imr_dest,
3472                                     rt->rt_dest);
3473                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3474                                     rt->rt_nexthop);
3475                                 imr->imr_metric = rt->rt_metric;
3476                                 imr->imr_nhops = rt->rt_nhops;
3477                                 imr->imr_lifetime =
3478                                     ieee80211_mesh_rt_update(rt, 0);
3479                                 imr->imr_lastmseq = rt->rt_lastmseq;
3480                                 imr->imr_flags = rt->rt_flags; /* last */
3481                                 off += sizeof(*imr);
3482                         }
3483                         MESH_RT_UNLOCK(ms);
3484                         error = copyout(p, (uint8_t *)ireq->i_data,
3485                             ireq->i_len);
3486                         IEEE80211_FREE(p, M_TEMP);
3487                         break;
3488                 case IEEE80211_MESH_RTCMD_FLUSH:
3489                 case IEEE80211_MESH_RTCMD_ADD:
3490                 case IEEE80211_MESH_RTCMD_DELETE:
3491                         return EINVAL;
3492                 default:
3493                         return ENOSYS;
3494                 }
3495                 break;
3496         case IEEE80211_IOC_MESH_PR_METRIC:
3497                 len = strlen(ms->ms_pmetric->mpm_descr);
3498                 if (ireq->i_len < len)
3499                         return EINVAL;
3500                 ireq->i_len = len;
3501                 error = copyout(ms->ms_pmetric->mpm_descr,
3502                     (uint8_t *)ireq->i_data, len);
3503                 break;
3504         case IEEE80211_IOC_MESH_PR_PATH:
3505                 len = strlen(ms->ms_ppath->mpp_descr);
3506                 if (ireq->i_len < len)
3507                         return EINVAL;
3508                 ireq->i_len = len;
3509                 error = copyout(ms->ms_ppath->mpp_descr,
3510                     (uint8_t *)ireq->i_data, len);
3511                 break;
3512         default:
3513                 return ENOSYS;
3514         }
3515
3516         return error;
3517 }
3518 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3519
3520 static int
3521 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3522 {
3523         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3524         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3525         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3526         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3527         int error;
3528
3529         if (vap->iv_opmode != IEEE80211_M_MBSS)
3530                 return ENOSYS;
3531
3532         error = 0;
3533         switch (ireq->i_type) {
3534         case IEEE80211_IOC_MESH_ID:
3535                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3536                         return EINVAL;
3537                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3538                 if (error != 0)
3539                         break;
3540                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3541                 ms->ms_idlen = ireq->i_len;
3542                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3543                 error = ENETRESET;
3544                 break;
3545         case IEEE80211_IOC_MESH_AP:
3546                 if (ireq->i_val)
3547                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3548                 else
3549                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3550                 error = ENETRESET;
3551                 break;
3552         case IEEE80211_IOC_MESH_FWRD:
3553                 if (ireq->i_val)
3554                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3555                 else
3556                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3557                 mesh_gatemode_setup(vap);
3558                 break;
3559         case IEEE80211_IOC_MESH_GATE:
3560                 if (ireq->i_val)
3561                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3562                 else
3563                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3564                 break;
3565         case IEEE80211_IOC_MESH_TTL:
3566                 ms->ms_ttl = (uint8_t) ireq->i_val;
3567                 break;
3568         case IEEE80211_IOC_MESH_RTCMD:
3569                 switch (ireq->i_val) {
3570                 case IEEE80211_MESH_RTCMD_LIST:
3571                         return EINVAL;
3572                 case IEEE80211_MESH_RTCMD_FLUSH:
3573                         ieee80211_mesh_rt_flush(vap);
3574                         break;
3575                 case IEEE80211_MESH_RTCMD_ADD:
3576                         error = copyin(ireq->i_data, tmpaddr,
3577                             IEEE80211_ADDR_LEN);
3578                         if (error != 0)
3579                                 break;
3580                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, tmpaddr) ||
3581                             IEEE80211_ADDR_EQ(broadcastaddr, tmpaddr))
3582                                 return EINVAL;
3583                         ieee80211_mesh_discover(vap, tmpaddr, NULL);
3584                         break;
3585                 case IEEE80211_MESH_RTCMD_DELETE:
3586                         error = copyin(ireq->i_data, tmpaddr,
3587                             IEEE80211_ADDR_LEN);
3588                         if (error != 0)
3589                                 break;
3590                         ieee80211_mesh_rt_del(vap, tmpaddr);
3591                         break;
3592                 default:
3593                         return ENOSYS;
3594                 }
3595                 break;
3596         case IEEE80211_IOC_MESH_PR_METRIC:
3597                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3598                 if (error == 0) {
3599                         error = mesh_select_proto_metric(vap, tmpproto);
3600                         if (error == 0)
3601                                 error = ENETRESET;
3602                 }
3603                 break;
3604         case IEEE80211_IOC_MESH_PR_PATH:
3605                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3606                 if (error == 0) {
3607                         error = mesh_select_proto_path(vap, tmpproto);
3608                         if (error == 0)
3609                                 error = ENETRESET;
3610                 }
3611                 break;
3612         default:
3613                 return ENOSYS;
3614         }
3615         return error;
3616 }
3617 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);