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 /*
 900  * Helper function to note the Mesh Peer Link FSM change.
 901  */
 902 static void
 903 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
 904 {
 905         struct ieee80211vap *vap = ni->ni_vap;
 906         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 907 #ifdef IEEE80211_DEBUG
 908         static const char *meshlinkstates[] = {
 909                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
 910                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
 911                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
 912                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
 913                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
 914                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
 915         };
 916 #endif
 917         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
 918             ni, "peer link: %s -> %s",
 919             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
 920
 921         /* track neighbor count */
 922         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
 923             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 924                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
 925                 ms->ms_neighbors++;
 926                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 927         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
 928             state != IEEE80211_NODE_MESH_ESTABLISHED) {
 929                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
 930                 ms->ms_neighbors--;
 931                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 932         }
 933         ni->ni_mlstate = state;
 934         switch (state) {
 935         case IEEE80211_NODE_MESH_HOLDING:
 936                 ms->ms_ppath->mpp_peerdown(ni);
 937                 break;
 938         case IEEE80211_NODE_MESH_ESTABLISHED:
 939                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
 940                 break;
 941         default:
 942                 break;
 943         }
 944 }
 945
 946 /*
 947  * Helper function to generate a unique local ID required for mesh
 948  * peer establishment.
 949  */
 950 static void
 951 mesh_checkid(void *arg, struct ieee80211_node *ni)
 952 {
 953         uint16_t *r = arg;
 954
 955         if (*r == ni->ni_mllid)
 956                 *(uint16_t *)arg = 0;
 957 }
 958
 959 static uint32_t
 960 mesh_generateid(struct ieee80211vap *vap)
 961 {
 962         int maxiter = 4;
 963         uint16_t r;
 964
 965         do {
 966                 get_random_bytes(&r, 2);
 967                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
 968                 maxiter--;
 969         } while (r == 0 && maxiter > 0);
 970         return r;
 971 }
 972
 973 /*
 974  * Verifies if we already received this packet by checking its
 975  * sequence number.
 976  * Returns 0 if the frame is to be accepted, 1 otherwise.
 977  */
 978 static int
 979 mesh_checkpseq(struct ieee80211vap *vap,
 980     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
 981 {
 982         struct ieee80211_mesh_route *rt;
 983
 984         rt = ieee80211_mesh_rt_find(vap, source);
 985         if (rt == NULL) {
 986                 rt = ieee80211_mesh_rt_add(vap, source);
 987                 if (rt == NULL) {
 988                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 989                             "%s", "add mcast route failed");
 990                         vap->iv_stats.is_mesh_rtaddfailed++;
 991                         return 1;
 992                 }
 993                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 994                     "add mcast route, mesh seqno %d", seq);
 995                 rt->rt_lastmseq = seq;
 996                 return 0;
 997         }
 998         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
 999                 return 1;
1000         } else {
1001                 rt->rt_lastmseq = seq;
1002                 return 0;
1003         }
1004 }
1005
1006 /*
1007  * Iterate the routing table and locate the next hop.
1008  */
1009 struct ieee80211_node *
1010 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1011     const uint8_t dest[IEEE80211_ADDR_LEN])
1012 {
1013         struct ieee80211_mesh_route *rt;
1014
1015         rt = ieee80211_mesh_rt_find(vap, dest);
1016         if (rt == NULL)
1017                 return NULL;
1018         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1019                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1020                     "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1021                 /* XXX stat */
1022                 return NULL;
1023         }
1024         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1025                 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1026                 if (rt == NULL) return NULL;
1027                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1028                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1029                             "%s: meshgate !valid, flags 0x%x", __func__,
1030                             rt->rt_flags);
1031                         /* XXX stat */
1032                         return NULL;
1033                 }
1034         }
1035         return ieee80211_find_txnode(vap, rt->rt_nexthop);
1036 }
1037
1038 static void
1039 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1040     struct ieee80211_mesh_route *rt_gate)
1041 {
1042         struct ifnet *ifp = vap->iv_ifp;
1043         struct ieee80211_node *ni;
1044
1045         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1046
1047         ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1048         if (ni == NULL) {
1049                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1050                 m_freem(m);
1051                 return;
1052         }
1053
1054         /*
1055          * Send through the VAP packet transmit path.
1056          * This consumes the node ref grabbed above and
1057          * the mbuf, regardless of whether there's a problem
1058          * or not.
1059          */
1060         (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1061 }
1062
1063 /*
1064  * Forward the queued frames to known valid mesh gates.
1065  * Assume destination to be outside the MBSS (i.e. proxy entry),
1066  * If no valid mesh gates are known silently discard queued frames.
1067  * After transmitting frames to all known valid mesh gates, this route
1068  * will be marked invalid, and a new path discovery will happen in the hopes
1069  * that (at least) one of the mesh gates have a new proxy entry for us to use.
1070  */
1071 void
1072 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1073     struct ieee80211_mesh_route *rt_dest)
1074 {
1075         struct ieee80211com *ic = vap->iv_ic;
1076         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1077         struct ieee80211_mesh_route *rt_gate;
1078         struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1079         struct mbuf *m, *mcopy, *next;
1080
1081         IEEE80211_TX_UNLOCK_ASSERT(ic);
1082
1083         KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1084             ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1085
1086         /* XXX: send to more than one valid mash gate */
1087         MESH_RT_LOCK(ms);
1088
1089         m = ieee80211_ageq_remove(&ic->ic_stageq,
1090             (struct ieee80211_node *)(uintptr_t)
1091             ieee80211_mac_hash(ic, rt_dest->rt_dest));
1092
1093         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1094                 rt_gate = gr->gr_route;
1095                 if (rt_gate == NULL) {
1096                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1097                                 rt_dest->rt_dest,
1098                                 "mesh gate with no path %6D",
1099                                 gr->gr_addr, ":");
1100                         continue;
1101                 }
1102                 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1103                         continue;
1104                 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1105                     ("route not marked as a mesh gate"));
1106                 KASSERT((rt_gate->rt_flags &
1107                         IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1108                         ("found mesh gate that is also marked porxy"));
1109                 /*
1110                  * convert route to a proxy route gated by the current
1111                  * mesh gate, this is needed so encap can built data
1112                  * frame with correct address.
1113                  */
1114                 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1115                         IEEE80211_MESHRT_FLAGS_VALID;
1116                 rt_dest->rt_ext_seq = 1; /* random value */
1117                 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1118                 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1119                 rt_dest->rt_metric = rt_gate->rt_metric;
1120                 rt_dest->rt_nhops = rt_gate->rt_nhops;
1121                 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1122                 MESH_RT_UNLOCK(ms);
1123                 /* XXX: lock?? */
1124                 mcopy = m_dup(m, M_NOWAIT);
1125                 for (; mcopy != NULL; mcopy = next) {
1126                         next = mcopy->m_nextpkt;
1127                         mcopy->m_nextpkt = NULL;
1128                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1129                             rt_dest->rt_dest,
1130                             "flush queued frame %p len %d", mcopy,
1131                             mcopy->m_pkthdr.len);
1132                         mesh_transmit_to_gate(vap, mcopy, rt_gate);
1133                 }
1134                 MESH_RT_LOCK(ms);
1135         }
1136         rt_dest->rt_flags = 0; /* Mark invalid */
1137         m_freem(m);
1138         MESH_RT_UNLOCK(ms);
1139 }
1140
1141 /*
1142  * Forward the specified frame.
1143  * Decrement the TTL and set TA to our MAC address.
1144  */
1145 static void
1146 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1147     const struct ieee80211_meshcntl *mc)
1148 {
1149         struct ieee80211com *ic = vap->iv_ic;
1150         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1151         struct ifnet *ifp = vap->iv_ifp;
1152         const struct ieee80211_frame *wh =
1153             mtod(m, const struct ieee80211_frame *);
1154         struct mbuf *mcopy;
1155         struct ieee80211_meshcntl *mccopy;
1156         struct ieee80211_frame *whcopy;
1157         struct ieee80211_node *ni;
1158         int err;
1159
1160         /* This is called from the RX path - don't hold this lock */
1161         IEEE80211_TX_UNLOCK_ASSERT(ic);
1162
1163         /*
1164          * mesh ttl of 1 means we are the last one receiving it,
1165          * according to amendment we decrement and then check if
1166          * 0, if so we dont forward.
1167          */
1168         if (mc->mc_ttl < 1) {
1169                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1170                     "%s", "frame not fwd'd, ttl 1");
1171                 vap->iv_stats.is_mesh_fwd_ttl++;
1172                 return;
1173         }
1174         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1175                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1176                     "%s", "frame not fwd'd, fwding disabled");
1177                 vap->iv_stats.is_mesh_fwd_disabled++;
1178                 return;
1179         }
1180         mcopy = m_dup(m, M_NOWAIT);
1181         if (mcopy == NULL) {
1182                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1183                     "%s", "frame not fwd'd, cannot dup");
1184                 vap->iv_stats.is_mesh_fwd_nobuf++;
1185                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1186                 return;
1187         }
1188         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1189             sizeof(struct ieee80211_meshcntl));
1190         if (mcopy == NULL) {
1191                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1192                     "%s", "frame not fwd'd, too short");
1193                 vap->iv_stats.is_mesh_fwd_tooshort++;
1194                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1195                 m_freem(mcopy);
1196                 return;
1197         }
1198         whcopy = mtod(mcopy, struct ieee80211_frame *);
1199         mccopy = (struct ieee80211_meshcntl *)
1200             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1201         /* XXX clear other bits? */
1202         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1203         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1204         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1205                 ni = ieee80211_ref_node(vap->iv_bss);
1206                 mcopy->m_flags |= M_MCAST;
1207         } else {
1208                 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1209                 if (ni == NULL) {
1210                         /*
1211                          * [Optional] any of the following three actions:
1212                          * o silently discard
1213                          * o trigger a path discovery
1214                          * o inform TA that meshDA is unknown.
1215                          */
1216                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1217                             "%s", "frame not fwd'd, no path");
1218                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1219                             IEEE80211_REASON_MESH_PERR_NO_FI);
1220                         vap->iv_stats.is_mesh_fwd_nopath++;
1221                         m_freem(mcopy);
1222                         return;
1223                 }
1224                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1225         }
1226         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1227         mccopy->mc_ttl--;
1228
1229         /* XXX calculate priority so drivers can find the tx queue */
1230         M_WME_SETAC(mcopy, WME_AC_BE);
1231
1232         /* XXX do we know m_nextpkt is NULL? */
1233         MPASS((mcopy->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
1234         mcopy->m_pkthdr.rcvif = (void *) ni;
1235
1236         /*
1237          * XXX this bypasses all of the VAP TX handling; it passes frames
1238          * directly to the parent interface.
1239          *
1240          * Because of this, there's no TX lock being held as there's no
1241          * encaps state being used.
1242          *
1243          * Doing a direct parent transmit may not be the correct thing
1244          * to do here; we'll have to re-think this soon.
1245          */
1246         IEEE80211_TX_LOCK(ic);
1247         err = ieee80211_parent_xmitpkt(ic, mcopy);
1248         IEEE80211_TX_UNLOCK(ic);
1249         if (!err)
1250                 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
1251 }
1252
1253 static struct mbuf *
1254 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1255 {
1256 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1257 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1258         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1259                   sizeof(struct ieee80211_meshcntl_ae10)];
1260         const struct ieee80211_qosframe_addr4 *wh;
1261         const struct ieee80211_meshcntl_ae10 *mc;
1262         struct ether_header *eh;
1263         struct llc *llc;
1264         int ae;
1265
1266         if (m->m_len < hdrlen + sizeof(*llc) &&
1267             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1268                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1269                     "discard data frame: %s", "m_pullup failed");
1270                 vap->iv_stats.is_rx_tooshort++;
1271                 return NULL;
1272         }
1273         memcpy(b, mtod(m, caddr_t), hdrlen);
1274         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1275         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1276         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1277                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1278             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1279
1280         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1281         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1282             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1283             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1284             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1285             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1286               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1287                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1288                 llc = NULL;
1289         } else {
1290                 m_adj(m, hdrlen - sizeof(*eh));
1291         }
1292         eh = mtod(m, struct ether_header *);
1293         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1294         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1295                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1296                 if (ae == IEEE80211_MESH_AE_00) {
1297                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1298                 } else if (ae == IEEE80211_MESH_AE_01) {
1299                         IEEE80211_ADDR_COPY(eh->ether_shost,
1300                             MC01(mc)->mc_addr4);
1301                 } else {
1302                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1303                             (const struct ieee80211_frame *)wh, NULL,
1304                             "bad AE %d", ae);
1305                         vap->iv_stats.is_mesh_badae++;
1306                         m_freem(m);
1307                         return NULL;
1308                 }
1309         } else {
1310                 if (ae == IEEE80211_MESH_AE_00) {
1311                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1312                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1313                 } else if (ae == IEEE80211_MESH_AE_10) {
1314                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1315                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1316                 } else {
1317                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1318                             (const struct ieee80211_frame *)wh, NULL,
1319                             "bad AE %d", ae);
1320                         vap->iv_stats.is_mesh_badae++;
1321                         m_freem(m);
1322                         return NULL;
1323                 }
1324         }
1325 #ifndef __NO_STRICT_ALIGNMENT
1326         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1327                 m = ieee80211_realign(vap, m, sizeof(*eh));
1328                 if (m == NULL)
1329                         return NULL;
1330         }
1331 #endif /* !__NO_STRICT_ALIGNMENT */
1332         if (llc != NULL) {
1333                 eh = mtod(m, struct ether_header *);
1334                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1335         }
1336         return m;
1337 #undef  WDIR
1338 #undef  MC01
1339 }
1340
1341 /*
1342  * Return non-zero if the unicast mesh data frame should be processed
1343  * locally.  Frames that are not proxy'd have our address, otherwise
1344  * we need to consult the routing table to look for a proxy entry.
1345  */
1346 static __inline int
1347 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1348     const struct ieee80211_meshcntl *mc)
1349 {
1350         int ae = mc->mc_flags & 3;
1351
1352         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1353             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1354         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1355             ("bad AE %d", ae));
1356         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
1357                 const struct ieee80211_meshcntl_ae10 *mc10 =
1358                     (const struct ieee80211_meshcntl_ae10 *) mc;
1359                 struct ieee80211_mesh_route *rt =
1360                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1361                 /* check for proxy route to ourself */
1362                 return (rt != NULL &&
1363                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1364         } else                                  /* ucast w/o proxy */
1365                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1366 }
1367
1368 /*
1369  * Verifies transmitter, updates lifetime, precursor list and forwards data.
1370  * > 0 means we have forwarded data and no need to process locally
1371  * == 0 means we want to process locally (and we may have forwarded data
1372  * < 0 means there was an error and data should be discarded
1373  */
1374 static int
1375 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1376     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1377 {
1378         struct ieee80211_qosframe_addr4 *qwh;
1379         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1380         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1381
1382         /* This is called from the RX path - don't hold this lock */
1383         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1384
1385         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1386
1387         /*
1388          * TODO:
1389          * o verify addr2 is  a legitimate transmitter
1390          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1391          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1392          */
1393
1394         /* set lifetime of addr3 (meshDA) to initial value */
1395         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1396         if (rt_meshda == NULL) {
1397                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1398                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
1399                 /*
1400                  * [Optional] any of the following three actions:
1401                  * o silently discard                           [X]
1402                  * o trigger a path discovery                   [ ]
1403                  * o inform TA that meshDA is unknown.          [ ]
1404                  */
1405                 /* XXX: stats */
1406                 return (-1);
1407         }
1408
1409         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1410             ms->ms_ppath->mpp_inact));
1411
1412         /* set lifetime of addr4 (meshSA) to initial value */
1413         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1414         KASSERT(rt_meshsa != NULL, ("no route"));
1415         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1416             ms->ms_ppath->mpp_inact));
1417
1418         mesh_forward(vap, m, mc);
1419         return (1); /* dont process locally */
1420 }
1421
1422 /*
1423  * Verifies transmitter, updates lifetime, precursor list and process data
1424  * locally, if data is proxy with AE = 10 it could mean data should go
1425  * on another mesh path or data should be forwarded to the DS.
1426  *
1427  * > 0 means we have forwarded data and no need to process locally
1428  * == 0 means we want to process locally (and we may have forwarded data
1429  * < 0 means there was an error and data should be discarded
1430  */
1431 static int
1432 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1433     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1434 {
1435         struct ieee80211_qosframe_addr4 *qwh;
1436         const struct ieee80211_meshcntl_ae10 *mc10;
1437         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1438         struct ieee80211_mesh_route *rt;
1439         int ae;
1440
1441         /* This is called from the RX path - don't hold this lock */
1442         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1443
1444         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1445         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1446
1447         /*
1448          * TODO:
1449          * o verify addr2 is  a legitimate transmitter
1450          * o lifetime of precursor entry is max(init, curr)
1451          */
1452
1453         /* set lifetime of addr4 (meshSA) to initial value */
1454         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1455         KASSERT(rt != NULL, ("no route"));
1456         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1457         rt = NULL;
1458
1459         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1460         KASSERT(ae == IEEE80211_MESH_AE_00 ||
1461             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1462         if (ae == IEEE80211_MESH_AE_10) {
1463                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1464                         return (0); /* process locally */
1465                 }
1466
1467                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1468                 if (rt != NULL &&
1469                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1470                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1471                         /*
1472                          * Forward on another mesh-path, according to
1473                          * amendment as specified in 9.32.4.1
1474                          */
1475                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1476                         mesh_forward(vap, m,
1477                             (const struct ieee80211_meshcntl *)mc10);
1478                         return (1); /* dont process locally */
1479                 }
1480                 /*
1481                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
1482                  * addressed according to 13.11.3.2.
1483                  */
1484                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1485                     "forward frame to DS, SA(%6D) DA(%6D)",
1486                     mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1487         }
1488         return (0); /* process locally */
1489 }
1490
1491 /*
1492  * Try to forward the group addressed data on to other mesh STAs, and
1493  * also to the DS.
1494  *
1495  * > 0 means we have forwarded data and no need to process locally
1496  * == 0 means we want to process locally (and we may have forwarded data
1497  * < 0 means there was an error and data should be discarded
1498  */
1499 static int
1500 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1501     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1502 {
1503 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1504         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1505
1506         /* This is called from the RX path - don't hold this lock */
1507         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1508
1509         mesh_forward(vap, m, mc);
1510
1511         if(mc->mc_ttl > 0) {
1512                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1513                         /*
1514                          * Forward of MSDUs from the MBSS to DS group addressed
1515                          * (according to 13.11.3.2)
1516                          * This happens by delivering the packet, and a bridge
1517                          * will sent it on another port member.
1518                          */
1519                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1520                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD) {
1521                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1522                                     MC01(mc)->mc_addr4, "%s",
1523                                     "forward from MBSS to the DS");
1524                         }
1525                 }
1526         }
1527         return (0); /* process locally */
1528 #undef  MC01
1529 }
1530
1531 static int
1532 mesh_input(struct ieee80211_node *ni, struct mbuf *m,
1533     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1534 {
1535 #define HAS_SEQ(type)   ((type & 0x4) == 0)
1536 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1537         struct ieee80211vap *vap = ni->ni_vap;
1538         struct ieee80211com *ic = ni->ni_ic;
1539         struct ifnet *ifp = vap->iv_ifp;
1540         struct ieee80211_frame *wh;
1541         const struct ieee80211_meshcntl *mc;
1542         int hdrspace, meshdrlen, need_tap, error;
1543         uint8_t dir, type, subtype, ae;
1544         uint32_t seq;
1545         const uint8_t *addr;
1546         uint8_t qos[2];
1547
1548         KASSERT(ni != NULL, ("null node"));
1549         ni->ni_inact = ni->ni_inact_reload;
1550
1551         need_tap = 1;                   /* mbuf need to be tapped. */
1552         type = -1;                      /* undefined */
1553
1554         /* This is called from the RX path - don't hold this lock */
1555         IEEE80211_TX_UNLOCK_ASSERT(ic);
1556
1557         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1558                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1559                     ni->ni_macaddr, NULL,
1560                     "too short (1): len %u", m->m_pkthdr.len);
1561                 vap->iv_stats.is_rx_tooshort++;
1562                 goto out;
1563         }
1564         /*
1565          * Bit of a cheat here, we use a pointer for a 3-address
1566          * frame format but don't reference fields past outside
1567          * ieee80211_frame_min w/o first validating the data is
1568          * present.
1569         */
1570         wh = mtod(m, struct ieee80211_frame *);
1571
1572         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1573             IEEE80211_FC0_VERSION_0) {
1574                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1575                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1576                 vap->iv_stats.is_rx_badversion++;
1577                 goto err;
1578         }
1579         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1580         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1581         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1582         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1583                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1584                 ni->ni_noise = nf;
1585                 if (HAS_SEQ(type)) {
1586                         uint8_t tid = ieee80211_gettid(wh);
1587
1588                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
1589                             TID_TO_WME_AC(tid) >= WME_AC_VI)
1590                                 ic->ic_wme.wme_hipri_traffic++;
1591                         if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs))
1592                                 goto out;
1593                 }
1594         }
1595 #ifdef IEEE80211_DEBUG
1596         /*
1597          * It's easier, but too expensive, to simulate different mesh
1598          * topologies by consulting the ACL policy very early, so do this
1599          * only under DEBUG.
1600          *
1601          * NB: this check is also done upon peering link initiation.
1602          */
1603         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1604                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1605                     wh, NULL, "%s", "disallowed by ACL");
1606                 vap->iv_stats.is_rx_acl++;
1607                 goto out;
1608         }
1609 #endif
1610         switch (type) {
1611         case IEEE80211_FC0_TYPE_DATA:
1612                 if (ni == vap->iv_bss)
1613                         goto out;
1614                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1615                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1616                             ni->ni_macaddr, NULL,
1617                             "peer link not yet established (%d)",
1618                             ni->ni_mlstate);
1619                         vap->iv_stats.is_mesh_nolink++;
1620                         goto out;
1621                 }
1622                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1623                     dir != IEEE80211_FC1_DIR_DSTODS) {
1624                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1625                             wh, "data", "incorrect dir 0x%x", dir);
1626                         vap->iv_stats.is_rx_wrongdir++;
1627                         goto err;
1628                 }
1629
1630                 /* All Mesh data frames are QoS subtype */
1631                 if (!HAS_SEQ(type)) {
1632                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1633                             wh, "data", "incorrect subtype 0x%x", subtype);
1634                         vap->iv_stats.is_rx_badsubtype++;
1635                         goto err;
1636                 }
1637
1638                 /*
1639                  * Next up, any fragmentation.
1640                  * XXX: we defrag before we even try to forward,
1641                  * Mesh Control field is not present in sub-sequent
1642                  * fragmented frames. This is in contrast to Draft 4.0.
1643                  */
1644                 hdrspace = ieee80211_hdrspace(ic, wh);
1645                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1646                         m = ieee80211_defrag(ni, m, hdrspace);
1647                         if (m == NULL) {
1648                                 /* Fragment dropped or frame not complete yet */
1649                                 goto out;
1650                         }
1651                 }
1652                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1653
1654                 /*
1655                  * Now we have a complete Mesh Data frame.
1656                  */
1657
1658                 /*
1659                  * Only fromDStoDS data frames use 4 address qos frames
1660                  * as specified in amendment. Otherwise addr4 is located
1661                  * in the Mesh Control field and a 3 address qos frame
1662                  * is used.
1663                  */
1664                 *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh);
1665
1666                 /*
1667                  * NB: The mesh STA sets the Mesh Control Present
1668                  * subfield to 1 in the Mesh Data frame containing
1669                  * an unfragmented MSDU, an A-MSDU, or the first
1670                  * fragment of an MSDU.
1671                  * After defrag it should always be present.
1672                  */
1673                 if (!(qos[1] & IEEE80211_QOS_MC)) {
1674                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1675                             ni->ni_macaddr, NULL,
1676                             "%s", "Mesh control field not present");
1677                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1678                         goto err;
1679                 }
1680
1681                 /* pull up enough to get to the mesh control */
1682                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1683                     (m = m_pullup(m, hdrspace +
1684                         sizeof(struct ieee80211_meshcntl))) == NULL) {
1685                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1686                             ni->ni_macaddr, NULL,
1687                             "data too short: expecting %u", hdrspace);
1688                         vap->iv_stats.is_rx_tooshort++;
1689                         goto out;               /* XXX */
1690                 }
1691                 /*
1692                  * Now calculate the full extent of the headers. Note
1693                  * mesh_decap will pull up anything we didn't get
1694                  * above when it strips the 802.11 headers.
1695                  */
1696                 mc = (const struct ieee80211_meshcntl *)
1697                     (mtod(m, const uint8_t *) + hdrspace);
1698                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1699                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1700                     ae * IEEE80211_ADDR_LEN;
1701                 hdrspace += meshdrlen;
1702
1703                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1704                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1705                     (m->m_len < hdrspace) &&
1706                     ((m = m_pullup(m, hdrspace)) == NULL)) {
1707                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1708                             ni->ni_macaddr, NULL,
1709                             "data too short: expecting %u", hdrspace);
1710                         vap->iv_stats.is_rx_tooshort++;
1711                         goto out;               /* XXX */
1712                 }
1713                 /* XXX: are we sure there is no reallocating after m_pullup? */
1714
1715                 seq = le32dec(mc->mc_seq);
1716                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1717                         addr = wh->i_addr3;
1718                 else if (ae == IEEE80211_MESH_AE_01)
1719                         addr = MC01(mc)->mc_addr4;
1720                 else
1721                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1722                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1723                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1724                             addr, "data", "%s", "not to me");
1725                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1726                         goto out;
1727                 }
1728                 if (mesh_checkpseq(vap, addr, seq) != 0) {
1729                         vap->iv_stats.is_rx_dup++;
1730                         goto out;
1731                 }
1732
1733                 /* This code "routes" the frame to the right control path */
1734                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1735                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1736                                 error =
1737                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1738                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1739                                 error = mesh_recv_group_data(vap, m, wh, mc);
1740                         else
1741                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1742                                     wh, mc);
1743                 } else
1744                         error = mesh_recv_group_data(vap, m, wh, mc);
1745                 if (error < 0)
1746                         goto err;
1747                 else if (error > 0)
1748                         goto out;
1749
1750                 if (ieee80211_radiotap_active_vap(vap))
1751                         ieee80211_radiotap_rx(vap, m);
1752                 need_tap = 0;
1753
1754                 /*
1755                  * Finally, strip the 802.11 header.
1756                  */
1757                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1758                 if (m == NULL) {
1759                         /* XXX mask bit to check for both */
1760                         /* don't count Null data frames as errors */
1761                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1762                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1763                                 goto out;
1764                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1765                             ni->ni_macaddr, "data", "%s", "decap error");
1766                         vap->iv_stats.is_rx_decap++;
1767                         IEEE80211_NODE_STAT(ni, rx_decap);
1768                         goto err;
1769                 }
1770                 if (qos[0] & IEEE80211_QOS_AMSDU) {
1771                         m = ieee80211_decap_amsdu(ni, m);
1772                         if (m == NULL)
1773                                 return IEEE80211_FC0_TYPE_DATA;
1774                 }
1775                 ieee80211_deliver_data(vap, ni, m);
1776                 return type;
1777         case IEEE80211_FC0_TYPE_MGT:
1778                 vap->iv_stats.is_rx_mgmt++;
1779                 IEEE80211_NODE_STAT(ni, rx_mgmt);
1780                 if (dir != IEEE80211_FC1_DIR_NODS) {
1781                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1782                             wh, "mgt", "incorrect dir 0x%x", dir);
1783                         vap->iv_stats.is_rx_wrongdir++;
1784                         goto err;
1785                 }
1786                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1787                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1788                             ni->ni_macaddr, "mgt", "too short: len %u",
1789                             m->m_pkthdr.len);
1790                         vap->iv_stats.is_rx_tooshort++;
1791                         goto out;
1792                 }
1793 #ifdef IEEE80211_DEBUG
1794                 if ((ieee80211_msg_debug(vap) &&
1795                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1796                     ieee80211_msg_dumppkts(vap)) {
1797                         if_printf(ifp, "received %s from %s rssi %d\n",
1798                             ieee80211_mgt_subtype_name(subtype),
1799                             ether_sprintf(wh->i_addr2), rssi);
1800                 }
1801 #endif
1802                 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1803                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1804                             wh, NULL, "%s", "WEP set but not permitted");
1805                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1806                         goto out;
1807                 }
1808                 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
1809                 goto out;
1810         case IEEE80211_FC0_TYPE_CTL:
1811                 vap->iv_stats.is_rx_ctl++;
1812                 IEEE80211_NODE_STAT(ni, rx_ctrl);
1813                 goto out;
1814         default:
1815                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1816                     wh, "bad", "frame type 0x%x", type);
1817                 /* should not come here */
1818                 break;
1819         }
1820 err:
1821         if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
1822 out:
1823         if (m != NULL) {
1824                 if (need_tap && ieee80211_radiotap_active_vap(vap))
1825                         ieee80211_radiotap_rx(vap, m);
1826                 m_freem(m);
1827         }
1828         return type;
1829 #undef  HAS_SEQ
1830 #undef  MC01
1831 }
1832
1833 static void
1834 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1835     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1836 {
1837         struct ieee80211vap *vap = ni->ni_vap;
1838         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1839         struct ieee80211com *ic = ni->ni_ic;
1840         struct ieee80211_channel *rxchan = ic->ic_curchan;
1841         struct ieee80211_frame *wh;
1842         struct ieee80211_mesh_route *rt;
1843         uint8_t *frm, *efrm;
1844
1845         wh = mtod(m0, struct ieee80211_frame *);
1846         frm = (uint8_t *)&wh[1];
1847         efrm = mtod(m0, uint8_t *) + m0->m_len;
1848         switch (subtype) {
1849         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1850         case IEEE80211_FC0_SUBTYPE_BEACON:
1851         {
1852                 struct ieee80211_scanparams scan;
1853                 struct ieee80211_channel *c;
1854                 /*
1855                  * We process beacon/probe response
1856                  * frames to discover neighbors.
1857                  */
1858                 if (rxs != NULL) {
1859                         c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1860                         if (c != NULL)
1861                                 rxchan = c;
1862                 }
1863                 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
1864                         return;
1865                 /*
1866                  * Count frame now that we know it's to be processed.
1867                  */
1868                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1869                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
1870                         IEEE80211_NODE_STAT(ni, rx_beacons);
1871                 } else
1872                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1873                 /*
1874                  * If scanning, just pass information to the scan module.
1875                  */
1876                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1877                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1878                                 /*
1879                                  * Actively scanning a channel marked passive;
1880                                  * send a probe request now that we know there
1881                                  * is 802.11 traffic present.
1882                                  *
1883                                  * XXX check if the beacon we recv'd gives
1884                                  * us what we need and suppress the probe req
1885                                  */
1886                                 ieee80211_probe_curchan(vap, 1);
1887                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1888                         }
1889                         ieee80211_add_scan(vap, rxchan, &scan, wh,
1890                             subtype, rssi, nf);
1891                         return;
1892                 }
1893
1894                 /* The rest of this code assumes we are running */
1895                 if (vap->iv_state != IEEE80211_S_RUN)
1896                         return;
1897                 /*
1898                  * Ignore non-mesh STAs.
1899                  */
1900                 if ((scan.capinfo &
1901                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1902                     scan.meshid == NULL || scan.meshconf == NULL) {
1903                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1904                             wh, "beacon", "%s", "not a mesh sta");
1905                         vap->iv_stats.is_mesh_wrongmesh++;
1906                         return;
1907                 }
1908                 /*
1909                  * Ignore STAs for other mesh networks.
1910                  */
1911                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1912                     mesh_verify_meshconf(vap, scan.meshconf)) {
1913                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1914                             wh, "beacon", "%s", "not for our mesh");
1915                         vap->iv_stats.is_mesh_wrongmesh++;
1916                         return;
1917                 }
1918                 /*
1919                  * Peer only based on the current ACL policy.
1920                  */
1921                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1922                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1923                             wh, NULL, "%s", "disallowed by ACL");
1924                         vap->iv_stats.is_rx_acl++;
1925                         return;
1926                 }
1927                 /*
1928                  * Do neighbor discovery.
1929                  */
1930                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1931                         /*
1932                          * Create a new entry in the neighbor table.
1933                          */
1934                         ni = ieee80211_add_neighbor(vap, wh, &scan);
1935                 }
1936                 /*
1937                  * Automatically peer with discovered nodes if possible.
1938                  */
1939                 if (ni != vap->iv_bss &&
1940                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1941                         switch (ni->ni_mlstate) {
1942                         case IEEE80211_NODE_MESH_IDLE:
1943                         {
1944                                 uint16_t args[1];
1945
1946                                 /* Wait for backoff callout to reset counter */
1947                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1948                                         return;
1949
1950                                 ni->ni_mlpid = mesh_generateid(vap);
1951                                 if (ni->ni_mlpid == 0)
1952                                         return;
1953                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1954                                 args[0] = ni->ni_mlpid;
1955                                 ieee80211_send_action(ni,
1956                                 IEEE80211_ACTION_CAT_SELF_PROT,
1957                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1958                                 ni->ni_mlrcnt = 0;
1959                                 mesh_peer_timeout_setup(ni);
1960                                 break;
1961                         }
1962                         case IEEE80211_NODE_MESH_ESTABLISHED:
1963                         {
1964                                 /*
1965                                  * Valid beacon from a peer mesh STA
1966                                  * bump TA lifetime
1967                                  */
1968                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1969                                 if(rt != NULL) {
1970                                         ieee80211_mesh_rt_update(rt,
1971                                             ticks_to_msecs(
1972                                             ms->ms_ppath->mpp_inact));
1973                                 }
1974                                 break;
1975                         }
1976                         default:
1977                                 break; /* ignore */
1978                         }
1979                 }
1980                 break;
1981         }
1982         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1983         {
1984                 uint8_t *ssid, *meshid, *rates, *xrates;
1985
1986                 if (vap->iv_state != IEEE80211_S_RUN) {
1987                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1988                             wh, NULL, "wrong state %s",
1989                             ieee80211_state_name[vap->iv_state]);
1990                         vap->iv_stats.is_rx_mgtdiscard++;
1991                         return;
1992                 }
1993                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1994                         /* frame must be directed */
1995                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1996                             wh, NULL, "%s", "not unicast");
1997                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
1998                         return;
1999                 }
2000                 /*
2001                  * prreq frame format
2002                  *      [tlv] ssid
2003                  *      [tlv] supported rates
2004                  *      [tlv] extended supported rates
2005                  *      [tlv] mesh id
2006                  */
2007                 ssid = meshid = rates = xrates = NULL;
2008                 while (efrm - frm > 1) {
2009                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2010                         switch (*frm) {
2011                         case IEEE80211_ELEMID_SSID:
2012                                 ssid = frm;
2013                                 break;
2014                         case IEEE80211_ELEMID_RATES:
2015                                 rates = frm;
2016                                 break;
2017                         case IEEE80211_ELEMID_XRATES:
2018                                 xrates = frm;
2019                                 break;
2020                         case IEEE80211_ELEMID_MESHID:
2021                                 meshid = frm;
2022                                 break;
2023                         }
2024                         frm += frm[1] + 2;
2025                 }
2026                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2027                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2028                 if (xrates != NULL)
2029                         IEEE80211_VERIFY_ELEMENT(xrates,
2030                             IEEE80211_RATE_MAXSIZE - rates[1], return);
2031                 if (meshid != NULL) {
2032                         IEEE80211_VERIFY_ELEMENT(meshid,
2033                             IEEE80211_MESHID_LEN, return);
2034                         /* NB: meshid, not ssid */
2035                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2036                 }
2037
2038                 /* XXX find a better class or define it's own */
2039                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2040                     "%s", "recv probe req");
2041                 /*
2042                  * Some legacy 11b clients cannot hack a complete
2043                  * probe response frame.  When the request includes
2044                  * only a bare-bones rate set, communicate this to
2045                  * the transmit side.
2046                  */
2047                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2048                 break;
2049         }
2050
2051         case IEEE80211_FC0_SUBTYPE_ACTION:
2052         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2053                 if (ni == vap->iv_bss) {
2054                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2055                             wh, NULL, "%s", "unknown node");
2056                         vap->iv_stats.is_rx_mgtdiscard++;
2057                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2058                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2059                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2060                             wh, NULL, "%s", "not for us");
2061                         vap->iv_stats.is_rx_mgtdiscard++;
2062                 } else if (vap->iv_state != IEEE80211_S_RUN) {
2063                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2064                             wh, NULL, "wrong state %s",
2065                             ieee80211_state_name[vap->iv_state]);
2066                         vap->iv_stats.is_rx_mgtdiscard++;
2067                 } else {
2068                         if (ieee80211_parse_action(ni, m0) == 0)
2069                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2070                 }
2071                 break;
2072
2073         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2074         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2075         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2076         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2077         case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2078         case IEEE80211_FC0_SUBTYPE_ATIM:
2079         case IEEE80211_FC0_SUBTYPE_DISASSOC:
2080         case IEEE80211_FC0_SUBTYPE_AUTH:
2081         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2082                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2083                     wh, NULL, "%s", "not handled");
2084                 vap->iv_stats.is_rx_mgtdiscard++;
2085                 break;
2086
2087         default:
2088                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2089                     wh, "mgt", "subtype 0x%x not handled", subtype);
2090                 vap->iv_stats.is_rx_badsubtype++;
2091                 break;
2092         }
2093 }
2094
2095 static void
2096 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2097 {
2098
2099         switch (subtype) {
2100         case IEEE80211_FC0_SUBTYPE_BAR:
2101                 ieee80211_recv_bar(ni, m);
2102                 break;
2103         }
2104 }
2105
2106 /*
2107  * Parse meshpeering action ie's for MPM frames
2108  */
2109 static const struct ieee80211_meshpeer_ie *
2110 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2111         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
2112         const uint8_t *frm, const uint8_t *efrm,
2113         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2114 {
2115         struct ieee80211vap *vap = ni->ni_vap;
2116         const struct ieee80211_meshpeer_ie *mpie;
2117         uint16_t args[3];
2118         const uint8_t *meshid, *meshconf;
2119         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2120
2121         meshid = meshconf = NULL;
2122         while (efrm - frm > 1) {
2123                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2124                 switch (*frm) {
2125                 case IEEE80211_ELEMID_MESHID:
2126                         meshid = frm;
2127                         break;
2128                 case IEEE80211_ELEMID_MESHCONF:
2129                         meshconf = frm;
2130                         break;
2131                 case IEEE80211_ELEMID_MESHPEER:
2132                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
2133                         memset(mp, 0, sizeof(*mp));
2134                         mp->peer_len = mpie->peer_len;
2135                         mp->peer_proto = le16dec(&mpie->peer_proto);
2136                         mp->peer_llinkid = le16dec(&mpie->peer_llinkid);
2137                         switch (subtype) {
2138                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2139                                 mp->peer_linkid =
2140                                     le16dec(&mpie->peer_linkid);
2141                                 break;
2142                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
2143                                 /* NB: peer link ID is optional */
2144                                 if (mpie->peer_len ==
2145                                     (IEEE80211_MPM_BASE_SZ + 2)) {
2146                                         mp->peer_linkid = 0;
2147                                         mp->peer_rcode =
2148                                             le16dec(&mpie->peer_linkid);
2149                                 } else {
2150                                         mp->peer_linkid =
2151                                             le16dec(&mpie->peer_linkid);
2152                                         mp->peer_rcode =
2153                                             le16dec(&mpie->peer_rcode);
2154                                 }
2155                                 break;
2156                         }
2157                         break;
2158                 }
2159                 frm += frm[1] + 2;
2160         }
2161
2162         /*
2163          * Verify the contents of the frame.
2164          * If it fails validation, close the peer link.
2165          */
2166         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2167                 sendclose = 1;
2168                 IEEE80211_DISCARD(vap,
2169                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2170                     wh, NULL, "%s", "MPM validation failed");
2171         }
2172
2173         /* If meshid is not the same reject any frames type. */
2174         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2175                 sendclose = 1;
2176                 IEEE80211_DISCARD(vap,
2177                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2178                     wh, NULL, "%s", "not for our mesh");
2179                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2180                         /*
2181                          * Standard not clear about this, if we dont ignore
2182                          * there will be an endless loop between nodes sending
2183                          * CLOSE frames between each other with wrong meshid.
2184                          * Discard and timers will bring FSM to IDLE state.
2185                          */
2186                         return NULL;
2187                 }
2188         }
2189
2190         /*
2191          * Close frames are accepted if meshid is the same.
2192          * Verify the other two types.
2193          */
2194         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2195             mesh_verify_meshconf(vap, meshconf)) {
2196                 sendclose = 1;
2197                 IEEE80211_DISCARD(vap,
2198                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2199                     wh, NULL, "%s", "configuration missmatch");
2200         }
2201
2202         if (sendclose) {
2203                 vap->iv_stats.is_rx_mgtdiscard++;
2204                 switch (ni->ni_mlstate) {
2205                 case IEEE80211_NODE_MESH_IDLE:
2206                 case IEEE80211_NODE_MESH_ESTABLISHED:
2207                 case IEEE80211_NODE_MESH_HOLDING:
2208                         /* ignore */
2209                         break;
2210                 case IEEE80211_NODE_MESH_OPENSNT:
2211                 case IEEE80211_NODE_MESH_OPENRCV:
2212                 case IEEE80211_NODE_MESH_CONFIRMRCV:
2213                         args[0] = ni->ni_mlpid;
2214                         args[1] = ni->ni_mllid;
2215                         /* Reason codes for rejection */
2216                         switch (subtype) {
2217                         case IEEE80211_ACTION_MESHPEERING_OPEN:
2218                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2219                                 break;
2220                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2221                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2222                                 break;
2223                         }
2224                         ieee80211_send_action(ni,
2225                             IEEE80211_ACTION_CAT_SELF_PROT,
2226                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2227                             args);
2228                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2229                         mesh_peer_timeout_setup(ni);
2230                         break;
2231                 }
2232                 return NULL;
2233         }
2234
2235         return (const struct ieee80211_meshpeer_ie *) mp;
2236 }
2237
2238 static int
2239 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2240         const struct ieee80211_frame *wh,
2241         const uint8_t *frm, const uint8_t *efrm)
2242 {
2243         struct ieee80211vap *vap = ni->ni_vap;
2244         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2245         struct ieee80211_meshpeer_ie ie;
2246         const struct ieee80211_meshpeer_ie *meshpeer;
2247         uint16_t args[3];
2248
2249         /* +2+2 for action + code + capabilites */
2250         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2251             IEEE80211_ACTION_MESHPEERING_OPEN);
2252         if (meshpeer == NULL) {
2253                 return 0;
2254         }
2255
2256         /* XXX move up */
2257         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2258             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2259
2260         switch (ni->ni_mlstate) {
2261         case IEEE80211_NODE_MESH_IDLE:
2262                 /* Reject open request if reached our maximum neighbor count */
2263                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2264                         args[0] = meshpeer->peer_llinkid;
2265                         args[1] = 0;
2266                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2267                         ieee80211_send_action(ni,
2268                             IEEE80211_ACTION_CAT_SELF_PROT,
2269                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2270                             args);
2271                         /* stay in IDLE state */
2272                         return (0);
2273                 }
2274                 /* Open frame accepted */
2275                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2276                 ni->ni_mllid = meshpeer->peer_llinkid;
2277                 ni->ni_mlpid = mesh_generateid(vap);
2278                 if (ni->ni_mlpid == 0)
2279                         return 0;               /* XXX */
2280                 args[0] = ni->ni_mlpid;
2281                 /* Announce we're open too... */
2282                 ieee80211_send_action(ni,
2283                     IEEE80211_ACTION_CAT_SELF_PROT,
2284                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
2285                 /* ...and confirm the link. */
2286                 args[0] = ni->ni_mlpid;
2287                 args[1] = ni->ni_mllid;
2288                 ieee80211_send_action(ni,
2289                     IEEE80211_ACTION_CAT_SELF_PROT,
2290                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2291                     args);
2292                 mesh_peer_timeout_setup(ni);
2293                 break;
2294         case IEEE80211_NODE_MESH_OPENRCV:
2295                 /* Wrong Link ID */
2296                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2297                         args[0] = ni->ni_mllid;
2298                         args[1] = ni->ni_mlpid;
2299                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2300                         ieee80211_send_action(ni,
2301                             IEEE80211_ACTION_CAT_SELF_PROT,
2302                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2303                             args);
2304                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2305                         mesh_peer_timeout_setup(ni);
2306                         break;
2307                 }
2308                 /* Duplicate open, confirm again. */
2309                 args[0] = ni->ni_mlpid;
2310                 args[1] = ni->ni_mllid;
2311                 ieee80211_send_action(ni,
2312                     IEEE80211_ACTION_CAT_SELF_PROT,
2313                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2314                     args);
2315                 break;
2316         case IEEE80211_NODE_MESH_OPENSNT:
2317                 ni->ni_mllid = meshpeer->peer_llinkid;
2318                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2319                 args[0] = ni->ni_mlpid;
2320                 args[1] = ni->ni_mllid;
2321                 ieee80211_send_action(ni,
2322                     IEEE80211_ACTION_CAT_SELF_PROT,
2323                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2324                     args);
2325                 /* NB: don't setup/clear any timeout */
2326                 break;
2327         case IEEE80211_NODE_MESH_CONFIRMRCV:
2328                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2329                     ni->ni_mllid != meshpeer->peer_llinkid) {
2330                         args[0] = ni->ni_mlpid;
2331                         args[1] = ni->ni_mllid;
2332                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2333                         ieee80211_send_action(ni,
2334                             IEEE80211_ACTION_CAT_SELF_PROT,
2335                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2336                             args);
2337                         mesh_linkchange(ni,
2338                             IEEE80211_NODE_MESH_HOLDING);
2339                         mesh_peer_timeout_setup(ni);
2340                         break;
2341                 }
2342                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2343                 ni->ni_mllid = meshpeer->peer_llinkid;
2344                 args[0] = ni->ni_mlpid;
2345                 args[1] = ni->ni_mllid;
2346                 ieee80211_send_action(ni,
2347                     IEEE80211_ACTION_CAT_SELF_PROT,
2348                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2349                     args);
2350                 mesh_peer_timeout_stop(ni);
2351                 break;
2352         case IEEE80211_NODE_MESH_ESTABLISHED:
2353                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2354                         args[0] = ni->ni_mllid;
2355                         args[1] = ni->ni_mlpid;
2356                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2357                         ieee80211_send_action(ni,
2358                             IEEE80211_ACTION_CAT_SELF_PROT,
2359                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2360                             args);
2361                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2362                         mesh_peer_timeout_setup(ni);
2363                         break;
2364                 }
2365                 args[0] = ni->ni_mlpid;
2366                 args[1] = ni->ni_mllid;
2367                 ieee80211_send_action(ni,
2368                     IEEE80211_ACTION_CAT_SELF_PROT,
2369                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2370                     args);
2371                 break;
2372         case IEEE80211_NODE_MESH_HOLDING:
2373                 args[0] = ni->ni_mlpid;
2374                 args[1] = meshpeer->peer_llinkid;
2375                 /* Standard not clear about what the reaason code should be */
2376                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2377                 ieee80211_send_action(ni,
2378                     IEEE80211_ACTION_CAT_SELF_PROT,
2379                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2380                     args);
2381                 break;
2382         }
2383         return 0;
2384 }
2385
2386 static int
2387 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2388         const struct ieee80211_frame *wh,
2389         const uint8_t *frm, const uint8_t *efrm)
2390 {
2391         struct ieee80211vap *vap = ni->ni_vap;
2392         struct ieee80211_meshpeer_ie ie;
2393         const struct ieee80211_meshpeer_ie *meshpeer;
2394         uint16_t args[3];
2395
2396         /* +2+2+2+2 for action + code + capabilites + status code + AID */
2397         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2398             IEEE80211_ACTION_MESHPEERING_CONFIRM);
2399         if (meshpeer == NULL) {
2400                 return 0;
2401         }
2402
2403         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2404             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2405             meshpeer->peer_llinkid, meshpeer->peer_linkid);
2406
2407         switch (ni->ni_mlstate) {
2408         case IEEE80211_NODE_MESH_OPENRCV:
2409                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2410                 mesh_peer_timeout_stop(ni);
2411                 break;
2412         case IEEE80211_NODE_MESH_OPENSNT:
2413                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2414                 mesh_peer_timeout_setup(ni);
2415                 break;
2416         case IEEE80211_NODE_MESH_HOLDING:
2417                 args[0] = ni->ni_mlpid;
2418                 args[1] = meshpeer->peer_llinkid;
2419                 /* Standard not clear about what the reaason code should be */
2420                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2421                 ieee80211_send_action(ni,
2422                     IEEE80211_ACTION_CAT_SELF_PROT,
2423                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2424                     args);
2425                 break;
2426         case IEEE80211_NODE_MESH_CONFIRMRCV:
2427                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2428                         args[0] = ni->ni_mlpid;
2429                         args[1] = ni->ni_mllid;
2430                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2431                         ieee80211_send_action(ni,
2432                             IEEE80211_ACTION_CAT_SELF_PROT,
2433                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2434                             args);
2435                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2436                         mesh_peer_timeout_setup(ni);
2437                 }
2438                 break;
2439         default:
2440                 IEEE80211_DISCARD(vap,
2441                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2442                     wh, NULL, "received confirm in invalid state %d",
2443                     ni->ni_mlstate);
2444                 vap->iv_stats.is_rx_mgtdiscard++;
2445                 break;
2446         }
2447         return 0;
2448 }
2449
2450 static int
2451 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2452         const struct ieee80211_frame *wh,
2453         const uint8_t *frm, const uint8_t *efrm)
2454 {
2455         struct ieee80211_meshpeer_ie ie;
2456         const struct ieee80211_meshpeer_ie *meshpeer;
2457         uint16_t args[3];
2458
2459         /* +2 for action + code */
2460         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2461             IEEE80211_ACTION_MESHPEERING_CLOSE);
2462         if (meshpeer == NULL) {
2463                 return 0;
2464         }
2465
2466         /*
2467          * XXX: check reason code, for example we could receive
2468          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2469          * to peer again.
2470          */
2471
2472         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2473             ni, "%s", "recv PEER CLOSE");
2474
2475         switch (ni->ni_mlstate) {
2476         case IEEE80211_NODE_MESH_IDLE:
2477                 /* ignore */
2478                 break;
2479         case IEEE80211_NODE_MESH_OPENRCV:
2480         case IEEE80211_NODE_MESH_OPENSNT:
2481         case IEEE80211_NODE_MESH_CONFIRMRCV:
2482         case IEEE80211_NODE_MESH_ESTABLISHED:
2483                 args[0] = ni->ni_mlpid;
2484                 args[1] = ni->ni_mllid;
2485                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2486                 ieee80211_send_action(ni,
2487                     IEEE80211_ACTION_CAT_SELF_PROT,
2488                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2489                     args);
2490                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2491                 mesh_peer_timeout_setup(ni);
2492                 break;
2493         case IEEE80211_NODE_MESH_HOLDING:
2494                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2495                 mesh_peer_timeout_stop(ni);
2496                 break;
2497         }
2498         return 0;
2499 }
2500
2501 /*
2502  * Link Metric handling.
2503  */
2504 static int
2505 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2506         const struct ieee80211_frame *wh,
2507         const uint8_t *frm, const uint8_t *efrm)
2508 {
2509         const struct ieee80211_meshlmetric_ie *ie =
2510             (const struct ieee80211_meshlmetric_ie *)
2511             (frm+2); /* action + code */
2512         struct ieee80211_meshlmetric_ie lm_rep;
2513
2514         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2515                 lm_rep.lm_flags = 0;
2516                 lm_rep.lm_metric = mesh_airtime_calc(ni);
2517                 ieee80211_send_action(ni,
2518                     IEEE80211_ACTION_CAT_MESH,
2519                     IEEE80211_ACTION_MESH_LMETRIC,
2520                     &lm_rep);
2521         }
2522         /* XXX: else do nothing for now */
2523         return 0;
2524 }
2525
2526 /*
2527  * Parse meshgate action ie's for GANN frames.
2528  * Returns -1 if parsing fails, otherwise 0.
2529  */
2530 static int
2531 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2532     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
2533     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2534 {
2535         struct ieee80211vap *vap = ni->ni_vap;
2536         const struct ieee80211_meshgann_ie *gannie;
2537
2538         while (efrm - frm > 1) {
2539                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2540                 switch (*frm) {
2541                 case IEEE80211_ELEMID_MESHGANN:
2542                         gannie = (const struct ieee80211_meshgann_ie *) frm;
2543                         memset(ie, 0, sizeof(*ie));
2544                         ie->gann_ie = gannie->gann_ie;
2545                         ie->gann_len = gannie->gann_len;
2546                         ie->gann_flags = gannie->gann_flags;
2547                         ie->gann_hopcount = gannie->gann_hopcount;
2548                         ie->gann_ttl = gannie->gann_ttl;
2549                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2550                         ie->gann_seq = le32dec(&gannie->gann_seq);
2551                         ie->gann_interval = le16dec(&gannie->gann_interval);
2552                         break;
2553                 }
2554                 frm += frm[1] + 2;
2555         }
2556
2557         return 0;
2558 }
2559
2560 /*
2561  * Mesh Gate Announcement handling.
2562  */
2563 static int
2564 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2565         const struct ieee80211_frame *wh,
2566         const uint8_t *frm, const uint8_t *efrm)
2567 {
2568         struct ieee80211vap *vap = ni->ni_vap;
2569         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2570         struct ieee80211_mesh_gate_route *gr, *next;
2571         struct ieee80211_mesh_route *rt_gate;
2572         struct ieee80211_meshgann_ie pgann;
2573         struct ieee80211_meshgann_ie ie;
2574         int found = 0;
2575
2576         /* +2 for action + code */
2577         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2578                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2579                     ni->ni_macaddr, NULL, "%s",
2580                     "GANN parsing failed");
2581                 vap->iv_stats.is_rx_mgtdiscard++;
2582                 return (0);
2583         }
2584
2585         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2586                 return 0;
2587
2588         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2589             "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2590             ie.gann_seq);
2591
2592         if (ms == NULL)
2593                 return (0);
2594         MESH_RT_LOCK(ms);
2595         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2596                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2597                         continue;
2598                 if (ie.gann_seq <= gr->gr_lastseq) {
2599                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2600                             ni->ni_macaddr, NULL,
2601                             "GANN old seqno %u <= %u",
2602                             ie.gann_seq, gr->gr_lastseq);
2603                         MESH_RT_UNLOCK(ms);
2604                         return (0);
2605                 }
2606                 /* corresponding mesh gate found & GANN accepted */
2607                 found = 1;
2608                 break;
2609
2610         }
2611         if (found == 0) {
2612                 /* this GANN is from a new mesh Gate add it to known table. */
2613                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2614                     "stored new GANN information, seq %u.", ie.gann_seq);
2615                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2616                     M_80211_MESH_GT_RT,
2617                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2618                 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2619                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2620         }
2621         gr->gr_lastseq = ie.gann_seq;
2622
2623         /* check if we have a path to this gate */
2624         rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2625         if (rt_gate != NULL &&
2626             rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2627                 gr->gr_route = rt_gate;
2628                 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2629         }
2630
2631         MESH_RT_UNLOCK(ms);
2632
2633         /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2634         if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2635                 return 0;
2636         pgann.gann_flags = ie.gann_flags; /* Reserved */
2637         pgann.gann_hopcount = ie.gann_hopcount + 1;
2638         pgann.gann_ttl = ie.gann_ttl - 1;
2639         IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2640         pgann.gann_seq = ie.gann_seq;
2641         pgann.gann_interval = ie.gann_interval;
2642
2643         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2644             "%s", "propagate GANN");
2645
2646         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2647             IEEE80211_ACTION_MESH_GANN, &pgann);
2648
2649         return 0;
2650 }
2651
2652 static int
2653 mesh_send_action(struct ieee80211_node *ni,
2654     const uint8_t sa[IEEE80211_ADDR_LEN],
2655     const uint8_t da[IEEE80211_ADDR_LEN],
2656     struct mbuf *m)
2657 {
2658         struct ieee80211vap *vap = ni->ni_vap;
2659         struct ieee80211com *ic = ni->ni_ic;
2660         struct ieee80211_bpf_params params;
2661         int ret;
2662
2663         KASSERT(ni != NULL, ("null node"));
2664
2665         if (vap->iv_state == IEEE80211_S_CAC) {
2666                 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2667                     "block %s frame in CAC state", "Mesh action");
2668                 vap->iv_stats.is_tx_badstate++;
2669                 ieee80211_free_node(ni);
2670                 m_freem(m);
2671                 return EIO;             /* XXX */
2672         }
2673
2674         M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2675         if (m == NULL) {
2676                 ieee80211_free_node(ni);
2677                 return ENOMEM;
2678         }
2679
2680         IEEE80211_TX_LOCK(ic);
2681         ieee80211_send_setup(ni, m,
2682              IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2683              IEEE80211_NONQOS_TID, sa, da, sa);
2684         m->m_flags |= M_ENCAP;          /* mark encapsulated */
2685
2686         memset(&params, 0, sizeof(params));
2687         params.ibp_pri = WME_AC_VO;
2688         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2689         if (IEEE80211_IS_MULTICAST(da))
2690                 params.ibp_try0 = 1;
2691         else
2692                 params.ibp_try0 = ni->ni_txparms->maxretry;
2693         params.ibp_power = ni->ni_txpower;
2694
2695         IEEE80211_NODE_STAT(ni, tx_mgmt);
2696
2697         ret = ieee80211_raw_output(vap, ni, m, &params);
2698         IEEE80211_TX_UNLOCK(ic);
2699         return (ret);
2700 }
2701
2702 #define ADDSHORT(frm, v) do {                   \
2703         frm[0] = (v) & 0xff;                    \
2704         frm[1] = (v) >> 8;                      \
2705         frm += 2;                               \
2706 } while (0)
2707 #define ADDWORD(frm, v) do {                    \
2708         frm[0] = (v) & 0xff;                    \
2709         frm[1] = ((v) >> 8) & 0xff;             \
2710         frm[2] = ((v) >> 16) & 0xff;            \
2711         frm[3] = ((v) >> 24) & 0xff;            \
2712         frm += 4;                               \
2713 } while (0)
2714
2715 static int
2716 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2717         int category, int action, void *args0)
2718 {
2719         struct ieee80211vap *vap = ni->ni_vap;
2720         struct ieee80211com *ic = ni->ni_ic;
2721         uint16_t *args = args0;
2722         const struct ieee80211_rateset *rs;
2723         struct mbuf *m;
2724         uint8_t *frm;
2725
2726         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2727             "send PEER OPEN action: localid 0x%x", args[0]);
2728
2729         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2730             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2731             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2732         ieee80211_ref_node(ni);
2733
2734         m = ieee80211_getmgtframe(&frm,
2735             ic->ic_headroom + sizeof(struct ieee80211_frame),
2736             sizeof(uint16_t)    /* action+category */
2737             + sizeof(uint16_t)  /* capabilites */
2738             + 2 + IEEE80211_RATE_SIZE
2739             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2740             + 2 + IEEE80211_MESHID_LEN
2741             + sizeof(struct ieee80211_meshconf_ie)
2742             + sizeof(struct ieee80211_meshpeer_ie)
2743         );
2744         if (m != NULL) {
2745                 /*
2746                  * mesh peer open action frame format:
2747                  *   [1] category
2748                  *   [1] action
2749                  *   [2] capabilities
2750                  *   [tlv] rates
2751                  *   [tlv] xrates
2752                  *   [tlv] mesh id
2753                  *   [tlv] mesh conf
2754                  *   [tlv] mesh peer link mgmt
2755                  */
2756                 *frm++ = category;
2757                 *frm++ = action;
2758                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2759                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2760                 frm = ieee80211_add_rates(frm, rs);
2761                 frm = ieee80211_add_xrates(frm, rs);
2762                 frm = ieee80211_add_meshid(frm, vap);
2763                 frm = ieee80211_add_meshconf(frm, vap);
2764                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2765                     args[0], 0, 0);
2766                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2767                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2768         } else {
2769                 vap->iv_stats.is_tx_nobuf++;
2770                 ieee80211_free_node(ni);
2771                 return ENOMEM;
2772         }
2773 }
2774
2775 static int
2776 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2777         int category, int action, void *args0)
2778 {
2779         struct ieee80211vap *vap = ni->ni_vap;
2780         struct ieee80211com *ic = ni->ni_ic;
2781         uint16_t *args = args0;
2782         const struct ieee80211_rateset *rs;
2783         struct mbuf *m;
2784         uint8_t *frm;
2785
2786         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2787             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2788             args[0], args[1]);
2789
2790         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2791             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2792             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2793         ieee80211_ref_node(ni);
2794
2795         m = ieee80211_getmgtframe(&frm,
2796             ic->ic_headroom + sizeof(struct ieee80211_frame),
2797             sizeof(uint16_t)    /* action+category */
2798             + sizeof(uint16_t)  /* capabilites */
2799             + sizeof(uint16_t)  /* status code */
2800             + sizeof(uint16_t)  /* AID */
2801             + 2 + IEEE80211_RATE_SIZE
2802             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2803             + 2 + IEEE80211_MESHID_LEN
2804             + sizeof(struct ieee80211_meshconf_ie)
2805             + sizeof(struct ieee80211_meshpeer_ie)
2806         );
2807         if (m != NULL) {
2808                 /*
2809                  * mesh peer confirm action frame format:
2810                  *   [1] category
2811                  *   [1] action
2812                  *   [2] capabilities
2813                  *   [2] status code
2814                  *   [2] association id (peer ID)
2815                  *   [tlv] rates
2816                  *   [tlv] xrates
2817                  *   [tlv] mesh id
2818                  *   [tlv] mesh conf
2819                  *   [tlv] mesh peer link mgmt
2820                  */
2821                 *frm++ = category;
2822                 *frm++ = action;
2823                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2824                 ADDSHORT(frm, 0);               /* status code */
2825                 ADDSHORT(frm, args[1]);         /* AID */
2826                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2827                 frm = ieee80211_add_rates(frm, rs);
2828                 frm = ieee80211_add_xrates(frm, rs);
2829                 frm = ieee80211_add_meshid(frm, vap);
2830                 frm = ieee80211_add_meshconf(frm, vap);
2831                 frm = ieee80211_add_meshpeer(frm,
2832                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2833                     args[0], args[1], 0);
2834                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2835                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2836         } else {
2837                 vap->iv_stats.is_tx_nobuf++;
2838                 ieee80211_free_node(ni);
2839                 return ENOMEM;
2840         }
2841 }
2842
2843 static int
2844 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2845         int category, int action, void *args0)
2846 {
2847         struct ieee80211vap *vap = ni->ni_vap;
2848         struct ieee80211com *ic = ni->ni_ic;
2849         uint16_t *args = args0;
2850         struct mbuf *m;
2851         uint8_t *frm;
2852
2853         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2854             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)",
2855             args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
2856
2857         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2858             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2859             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2860         ieee80211_ref_node(ni);
2861
2862         m = ieee80211_getmgtframe(&frm,
2863             ic->ic_headroom + sizeof(struct ieee80211_frame),
2864             sizeof(uint16_t)    /* action+category */
2865             + sizeof(uint16_t)  /* reason code */
2866             + 2 + IEEE80211_MESHID_LEN
2867             + sizeof(struct ieee80211_meshpeer_ie)
2868         );
2869         if (m != NULL) {
2870                 /*
2871                  * mesh peer close action frame format:
2872                  *   [1] category
2873                  *   [1] action
2874                  *   [tlv] mesh id
2875                  *   [tlv] mesh peer link mgmt
2876                  */
2877                 *frm++ = category;
2878                 *frm++ = action;
2879                 frm = ieee80211_add_meshid(frm, vap);
2880                 frm = ieee80211_add_meshpeer(frm,
2881                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2882                     args[0], args[1], args[2]);
2883                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2884                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2885         } else {
2886                 vap->iv_stats.is_tx_nobuf++;
2887                 ieee80211_free_node(ni);
2888                 return ENOMEM;
2889         }
2890 }
2891
2892 static int
2893 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2894         int category, int action, void *arg0)
2895 {
2896         struct ieee80211vap *vap = ni->ni_vap;
2897         struct ieee80211com *ic = ni->ni_ic;
2898         struct ieee80211_meshlmetric_ie *ie = arg0;
2899         struct mbuf *m;
2900         uint8_t *frm;
2901
2902         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2903                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2904                     ni, "%s", "send LINK METRIC REQUEST action");
2905         } else {
2906                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2907                     ni, "send LINK METRIC REPLY action: metric 0x%x",
2908                     ie->lm_metric);
2909         }
2910         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2911             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2912             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2913         ieee80211_ref_node(ni);
2914
2915         m = ieee80211_getmgtframe(&frm,
2916             ic->ic_headroom + sizeof(struct ieee80211_frame),
2917             sizeof(uint16_t) +  /* action+category */
2918             sizeof(struct ieee80211_meshlmetric_ie)
2919         );
2920         if (m != NULL) {
2921                 /*
2922                  * mesh link metric
2923                  *   [1] category
2924                  *   [1] action
2925                  *   [tlv] mesh link metric
2926                  */
2927                 *frm++ = category;
2928                 *frm++ = action;
2929                 frm = ieee80211_add_meshlmetric(frm,
2930                     ie->lm_flags, ie->lm_metric);
2931                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2932                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2933         } else {
2934                 vap->iv_stats.is_tx_nobuf++;
2935                 ieee80211_free_node(ni);
2936                 return ENOMEM;
2937         }
2938 }
2939
2940 static int
2941 mesh_send_action_meshgate(struct ieee80211_node *ni,
2942         int category, int action, void *arg0)
2943 {
2944         struct ieee80211vap *vap = ni->ni_vap;
2945         struct ieee80211com *ic = ni->ni_ic;
2946         struct ieee80211_meshgann_ie *ie = arg0;
2947         struct mbuf *m;
2948         uint8_t *frm;
2949
2950         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2951             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2952             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2953         ieee80211_ref_node(ni);
2954
2955         m = ieee80211_getmgtframe(&frm,
2956             ic->ic_headroom + sizeof(struct ieee80211_frame),
2957             sizeof(uint16_t) +  /* action+category */
2958             IEEE80211_MESHGANN_BASE_SZ
2959         );
2960         if (m != NULL) {
2961                 /*
2962                  * mesh link metric
2963                  *   [1] category
2964                  *   [1] action
2965                  *   [tlv] mesh gate annoucement
2966                  */
2967                 *frm++ = category;
2968                 *frm++ = action;
2969                 frm = ieee80211_add_meshgate(frm, ie);
2970                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2971                 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2972         } else {
2973                 vap->iv_stats.is_tx_nobuf++;
2974                 ieee80211_free_node(ni);
2975                 return ENOMEM;
2976         }
2977 }
2978
2979 static void
2980 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2981 {
2982         switch (ni->ni_mlstate) {
2983         case IEEE80211_NODE_MESH_HOLDING:
2984                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2985                 break;
2986         case IEEE80211_NODE_MESH_CONFIRMRCV:
2987                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2988                 break;
2989         case IEEE80211_NODE_MESH_IDLE:
2990                 ni->ni_mltval = 0;
2991                 break;
2992         default:
2993                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
2994                 break;
2995         }
2996         if (ni->ni_mltval)
2997                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2998                     mesh_peer_timeout_cb, ni);
2999 }
3000
3001 /*
3002  * Same as above but backoffs timer statisically 50%.
3003  */
3004 static void
3005 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3006 {
3007         uint32_t r;
3008
3009         r = arc4random();
3010         ni->ni_mltval += r % ni->ni_mltval;
3011         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3012             ni);
3013 }
3014
3015 static __inline void
3016 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3017 {
3018         callout_drain(&ni->ni_mltimer);
3019 }
3020
3021 static void
3022 mesh_peer_backoff_cb(void *arg)
3023 {
3024         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3025
3026         /* After backoff timeout, try to peer automatically again. */
3027         ni->ni_mlhcnt = 0;
3028 }
3029
3030 /*
3031  * Mesh Peer Link Management FSM timeout handling.
3032  */
3033 static void
3034 mesh_peer_timeout_cb(void *arg)
3035 {
3036         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3037         uint16_t args[3];
3038
3039         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3040             ni, "mesh link timeout, state %d, retry counter %d",
3041             ni->ni_mlstate, ni->ni_mlrcnt);
3042
3043         switch (ni->ni_mlstate) {
3044         case IEEE80211_NODE_MESH_IDLE:
3045         case IEEE80211_NODE_MESH_ESTABLISHED:
3046                 break;
3047         case IEEE80211_NODE_MESH_OPENSNT:
3048         case IEEE80211_NODE_MESH_OPENRCV:
3049                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3050                         args[0] = ni->ni_mlpid;
3051                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3052                         ieee80211_send_action(ni,
3053                             IEEE80211_ACTION_CAT_SELF_PROT,
3054                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3055                         ni->ni_mlrcnt = 0;
3056                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3057                         mesh_peer_timeout_setup(ni);
3058                 } else {
3059                         args[0] = ni->ni_mlpid;
3060                         ieee80211_send_action(ni,
3061                             IEEE80211_ACTION_CAT_SELF_PROT,
3062                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
3063                         ni->ni_mlrcnt++;
3064                         mesh_peer_timeout_backoff(ni);
3065                 }
3066                 break;
3067         case IEEE80211_NODE_MESH_CONFIRMRCV:
3068                 args[0] = ni->ni_mlpid;
3069                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3070                 ieee80211_send_action(ni,
3071                     IEEE80211_ACTION_CAT_SELF_PROT,
3072                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3073                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3074                 mesh_peer_timeout_setup(ni);
3075                 break;
3076         case IEEE80211_NODE_MESH_HOLDING:
3077                 ni->ni_mlhcnt++;
3078                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3079                         callout_reset(&ni->ni_mlhtimer,
3080                             ieee80211_mesh_backofftimeout,
3081                             mesh_peer_backoff_cb, ni);
3082                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3083                 break;
3084         }
3085 }
3086
3087 static int
3088 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3089 {
3090         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3091
3092         if (ie == NULL || ie[1] != ms->ms_idlen)
3093                 return 1;
3094         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3095 }
3096
3097 /*
3098  * Check if we are using the same algorithms for this mesh.
3099  */
3100 static int
3101 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3102 {
3103         const struct ieee80211_meshconf_ie *meshconf =
3104             (const struct ieee80211_meshconf_ie *) ie;
3105         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3106
3107         if (meshconf == NULL)
3108                 return 1;
3109         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3110                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3111                     "unknown path selection algorithm: 0x%x\n",
3112                     meshconf->conf_pselid);
3113                 return 1;
3114         }
3115         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3116                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3117                     "unknown path metric algorithm: 0x%x\n",
3118                     meshconf->conf_pmetid);
3119                 return 1;
3120         }
3121         if (meshconf->conf_ccid != 0) {
3122                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3123                     "unknown congestion control algorithm: 0x%x\n",
3124                     meshconf->conf_ccid);
3125                 return 1;
3126         }
3127         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3128                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3129                     "unknown sync algorithm: 0x%x\n",
3130                     meshconf->conf_syncid);
3131                 return 1;
3132         }
3133         if (meshconf->conf_authid != 0) {
3134                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3135                     "unknown auth auth algorithm: 0x%x\n",
3136                     meshconf->conf_pselid);
3137                 return 1;
3138         }
3139         /* Not accepting peers */
3140         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3141                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3142                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
3143                 return 1;
3144         }
3145         return 0;
3146 }
3147
3148 static int
3149 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3150     const uint8_t *ie)
3151 {
3152         const struct ieee80211_meshpeer_ie *meshpeer =
3153             (const struct ieee80211_meshpeer_ie *) ie;
3154
3155         if (meshpeer == NULL ||
3156             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3157             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3158                 return 1;
3159         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3160                 IEEE80211_DPRINTF(vap,
3161                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3162                     "Only MPM protocol is supported (proto: 0x%02X)",
3163                     meshpeer->peer_proto);
3164                 return 1;
3165         }
3166         switch (subtype) {
3167         case IEEE80211_ACTION_MESHPEERING_OPEN:
3168                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3169                         return 1;
3170                 break;
3171         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3172                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3173                         return 1;
3174                 break;
3175         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3176                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3177                         return 1;
3178                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3179                     meshpeer->peer_linkid != 0)
3180                         return 1;
3181                 if (meshpeer->peer_rcode == 0)
3182                         return 1;
3183                 break;
3184         }
3185         return 0;
3186 }
3187
3188 /*
3189  * Add a Mesh ID IE to a frame.
3190  */
3191 uint8_t *
3192 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3193 {
3194         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3195
3196         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3197
3198         *frm++ = IEEE80211_ELEMID_MESHID;
3199         *frm++ = ms->ms_idlen;
3200         memcpy(frm, ms->ms_id, ms->ms_idlen);
3201         return frm + ms->ms_idlen;
3202 }
3203
3204 /*
3205  * Add a Mesh Configuration IE to a frame.
3206  * For now just use HWMP routing, Airtime link metric, Null Congestion
3207  * Signaling, Null Sync Protocol and Null Authentication.
3208  */
3209 uint8_t *
3210 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3211 {
3212         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3213         uint16_t caps;
3214
3215         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3216
3217         *frm++ = IEEE80211_ELEMID_MESHCONF;
3218         *frm++ = IEEE80211_MESH_CONF_SZ;
3219         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
3220         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
3221         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3222         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3223         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3224         /* NB: set the number of neighbors before the rest */
3225         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3226             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3227         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3228                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3229         frm += 1;
3230         caps = 0;
3231         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3232                 caps |= IEEE80211_MESHCONF_CAP_AP;
3233         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3234                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3235         *frm++ = caps;
3236         return frm;
3237 }
3238
3239 /*
3240  * Add a Mesh Peer Management IE to a frame.
3241  */
3242 uint8_t *
3243 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3244     uint16_t peerid, uint16_t reason)
3245 {
3246
3247         KASSERT(localid != 0, ("localid == 0"));
3248
3249         *frm++ = IEEE80211_ELEMID_MESHPEER;
3250         switch (subtype) {
3251         case IEEE80211_ACTION_MESHPEERING_OPEN:
3252                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
3253                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3254                 ADDSHORT(frm, localid);                 /* local ID */
3255                 break;
3256         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3257                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3258                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
3259                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3260                 ADDSHORT(frm, localid);                 /* local ID */
3261                 ADDSHORT(frm, peerid);                  /* peer ID */
3262                 break;
3263         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3264                 if (peerid)
3265                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
3266                 else
3267                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3268                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3269                 ADDSHORT(frm, localid); /* local ID */
3270                 if (peerid)
3271                         ADDSHORT(frm, peerid);  /* peer ID */
3272                 ADDSHORT(frm, reason);
3273                 break;
3274         }
3275         return frm;
3276 }
3277
3278 /*
3279  * Compute an Airtime Link Metric for the link with this node.
3280  *
3281  * Based on Draft 3.0 spec (11B.10, p.149).
3282  */
3283 /*
3284  * Max 802.11s overhead.
3285  */
3286 #define IEEE80211_MESH_MAXOVERHEAD \
3287         (sizeof(struct ieee80211_qosframe_addr4) \
3288          + sizeof(struct ieee80211_meshcntl_ae10) \
3289         + sizeof(struct llc) \
3290         + IEEE80211_ADDR_LEN \
3291         + IEEE80211_WEP_IVLEN \
3292         + IEEE80211_WEP_KIDLEN \
3293         + IEEE80211_WEP_CRCLEN \
3294         + IEEE80211_WEP_MICLEN \
3295         + IEEE80211_CRC_LEN)
3296 uint32_t
3297 mesh_airtime_calc(struct ieee80211_node *ni)
3298 {
3299 #define M_BITS 8
3300 #define S_FACTOR (2 * M_BITS)
3301         struct ieee80211com *ic = ni->ni_ic;
3302         struct ifnet *ifp = ni->ni_vap->iv_ifp;
3303         const static int nbits = 8192 << M_BITS;
3304         uint32_t overhead, rate, errrate;
3305         uint64_t res;
3306
3307         /* Time to transmit a frame */
3308         rate = ni->ni_txrate;
3309         overhead = ieee80211_compute_duration(ic->ic_rt,
3310             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3311         /* Error rate in percentage */
3312         /* XXX assuming small failures are ok */
3313         errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
3314             ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
3315             / 100;
3316         res = (overhead + (nbits / rate)) *
3317             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3318
3319         return (uint32_t)(res >> S_FACTOR);
3320 #undef M_BITS
3321 #undef S_FACTOR
3322 }
3323
3324 /*
3325  * Add a Mesh Link Metric report IE to a frame.
3326  */
3327 uint8_t *
3328 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3329 {
3330         *frm++ = IEEE80211_ELEMID_MESHLINK;
3331         *frm++ = 5;
3332         *frm++ = flags;
3333         ADDWORD(frm, metric);
3334         return frm;
3335 }
3336
3337 /*
3338  * Add a Mesh Gate Announcement IE to a frame.
3339  */
3340 uint8_t *
3341 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3342 {
3343         *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3344         *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3345         *frm++ = ie->gann_flags;
3346         *frm++ = ie->gann_hopcount;
3347         *frm++ = ie->gann_ttl;
3348         IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3349         frm += 6;
3350         ADDWORD(frm, ie->gann_seq);
3351         ADDSHORT(frm, ie->gann_interval);
3352         return frm;
3353 }
3354 #undef ADDSHORT
3355 #undef ADDWORD
3356
3357 /*
3358  * Initialize any mesh-specific node state.
3359  */
3360 void
3361 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3362 {
3363         ni->ni_flags |= IEEE80211_NODE_QOS;
3364         callout_init(&ni->ni_mltimer, 1);
3365         callout_init(&ni->ni_mlhtimer, 1);
3366 }
3367
3368 /*
3369  * Cleanup any mesh-specific node state.
3370  */
3371 void
3372 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3373 {
3374         struct ieee80211vap *vap = ni->ni_vap;
3375         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3376
3377         callout_drain(&ni->ni_mltimer);
3378         callout_drain(&ni->ni_mlhtimer);
3379         /* NB: short-circuit callbacks after mesh_vdetach */
3380         if (vap->iv_mesh != NULL)
3381                 ms->ms_ppath->mpp_peerdown(ni);
3382 }
3383
3384 void
3385 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3386 {
3387         ni->ni_meshidlen = ie[1];
3388         memcpy(ni->ni_meshid, ie + 2, ie[1]);
3389 }
3390
3391 /*
3392  * Setup mesh-specific node state on neighbor discovery.
3393  */
3394 void
3395 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3396         const struct ieee80211_frame *wh,
3397         const struct ieee80211_scanparams *sp)
3398 {
3399         ieee80211_parse_meshid(ni, sp->meshid);
3400 }
3401
3402 void
3403 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3404         struct ieee80211_beacon_offsets *bo)
3405 {
3406         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3407
3408         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3409                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3410                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3411         }
3412 }
3413
3414 static int
3415 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3416 {
3417         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3418         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3419         struct ieee80211_mesh_route *rt;
3420         struct ieee80211req_mesh_route *imr;
3421         size_t len, off;
3422         uint8_t *p;
3423         int error;
3424
3425         if (vap->iv_opmode != IEEE80211_M_MBSS)
3426                 return ENOSYS;
3427
3428         error = 0;
3429         switch (ireq->i_type) {
3430         case IEEE80211_IOC_MESH_ID:
3431                 ireq->i_len = ms->ms_idlen;
3432                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3433                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3434                 break;
3435         case IEEE80211_IOC_MESH_AP:
3436                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3437                 break;
3438         case IEEE80211_IOC_MESH_FWRD:
3439                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3440                 break;
3441         case IEEE80211_IOC_MESH_GATE:
3442                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3443                 break;
3444         case IEEE80211_IOC_MESH_TTL:
3445                 ireq->i_val = ms->ms_ttl;
3446                 break;
3447         case IEEE80211_IOC_MESH_RTCMD:
3448                 switch (ireq->i_val) {
3449                 case IEEE80211_MESH_RTCMD_LIST:
3450                         len = 0;
3451                         MESH_RT_LOCK(ms);
3452                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3453                                 len += sizeof(*imr);
3454                         }
3455                         MESH_RT_UNLOCK(ms);
3456                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3457                                 ireq->i_len = len;
3458                                 return ENOMEM;
3459                         }
3460                         ireq->i_len = len;
3461                         /* XXX M_WAIT? */
3462                         p = IEEE80211_MALLOC(len, M_TEMP,
3463                             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
3464                         if (p == NULL)
3465                                 return ENOMEM;
3466                         off = 0;
3467                         MESH_RT_LOCK(ms);
3468                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3469                                 if (off >= len)
3470                                         break;
3471                                 imr = (struct ieee80211req_mesh_route *)
3472                                     (p + off);
3473                                 IEEE80211_ADDR_COPY(imr->imr_dest,
3474                                     rt->rt_dest);
3475                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3476                                     rt->rt_nexthop);
3477                                 imr->imr_metric = rt->rt_metric;
3478                                 imr->imr_nhops = rt->rt_nhops;
3479                                 imr->imr_lifetime =
3480                                     ieee80211_mesh_rt_update(rt, 0);
3481                                 imr->imr_lastmseq = rt->rt_lastmseq;
3482                                 imr->imr_flags = rt->rt_flags; /* last */
3483                                 off += sizeof(*imr);
3484                         }
3485                         MESH_RT_UNLOCK(ms);
3486                         error = copyout(p, (uint8_t *)ireq->i_data,
3487                             ireq->i_len);
3488                         IEEE80211_FREE(p, M_TEMP);
3489                         break;
3490                 case IEEE80211_MESH_RTCMD_FLUSH:
3491                 case IEEE80211_MESH_RTCMD_ADD:
3492                 case IEEE80211_MESH_RTCMD_DELETE:
3493                         return EINVAL;
3494                 default:
3495                         return ENOSYS;
3496                 }
3497                 break;
3498         case IEEE80211_IOC_MESH_PR_METRIC:
3499                 len = strlen(ms->ms_pmetric->mpm_descr);
3500                 if (ireq->i_len < len)
3501                         return EINVAL;
3502                 ireq->i_len = len;
3503                 error = copyout(ms->ms_pmetric->mpm_descr,
3504                     (uint8_t *)ireq->i_data, len);
3505                 break;
3506         case IEEE80211_IOC_MESH_PR_PATH:
3507                 len = strlen(ms->ms_ppath->mpp_descr);
3508                 if (ireq->i_len < len)
3509                         return EINVAL;
3510                 ireq->i_len = len;
3511                 error = copyout(ms->ms_ppath->mpp_descr,
3512                     (uint8_t *)ireq->i_data, len);
3513                 break;
3514         default:
3515                 return ENOSYS;
3516         }
3517
3518         return error;
3519 }
3520 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3521
3522 static int
3523 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3524 {
3525         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3526         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3527         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3528         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3529         int error;
3530
3531         if (vap->iv_opmode != IEEE80211_M_MBSS)
3532                 return ENOSYS;
3533
3534         error = 0;
3535         switch (ireq->i_type) {
3536         case IEEE80211_IOC_MESH_ID:
3537                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3538                         return EINVAL;
3539                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3540                 if (error != 0)
3541                         break;
3542                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3543                 ms->ms_idlen = ireq->i_len;
3544                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3545                 error = ENETRESET;
3546                 break;
3547         case IEEE80211_IOC_MESH_AP:
3548                 if (ireq->i_val)
3549                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3550                 else
3551                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3552                 error = ENETRESET;
3553                 break;
3554         case IEEE80211_IOC_MESH_FWRD:
3555                 if (ireq->i_val)
3556                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3557                 else
3558                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3559                 mesh_gatemode_setup(vap);
3560                 break;
3561         case IEEE80211_IOC_MESH_GATE:
3562                 if (ireq->i_val)
3563                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3564                 else
3565                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3566                 break;
3567         case IEEE80211_IOC_MESH_TTL:
3568                 ms->ms_ttl = (uint8_t) ireq->i_val;
3569                 break;
3570         case IEEE80211_IOC_MESH_RTCMD:
3571                 switch (ireq->i_val) {
3572                 case IEEE80211_MESH_RTCMD_LIST:
3573                         return EINVAL;
3574                 case IEEE80211_MESH_RTCMD_FLUSH:
3575                         ieee80211_mesh_rt_flush(vap);
3576                         break;
3577                 case IEEE80211_MESH_RTCMD_ADD:
3578                         error = copyin(ireq->i_data, tmpaddr,
3579                             IEEE80211_ADDR_LEN);
3580                         if (error != 0)
3581                                 break;
3582                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, tmpaddr) ||
3583                             IEEE80211_ADDR_EQ(broadcastaddr, tmpaddr))
3584                                 return EINVAL;
3585                         ieee80211_mesh_discover(vap, tmpaddr, NULL);
3586                         break;
3587                 case IEEE80211_MESH_RTCMD_DELETE:
3588                         error = copyin(ireq->i_data, tmpaddr,
3589                             IEEE80211_ADDR_LEN);
3590                         if (error != 0)
3591                                 break;
3592                         ieee80211_mesh_rt_del(vap, tmpaddr);
3593                         break;
3594                 default:
3595                         return ENOSYS;
3596                 }
3597                 break;
3598         case IEEE80211_IOC_MESH_PR_METRIC:
3599                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3600                 if (error == 0) {
3601                         error = mesh_select_proto_metric(vap, tmpproto);
3602                         if (error == 0)
3603                                 error = ENETRESET;
3604                 }
3605                 break;
3606         case IEEE80211_IOC_MESH_PR_PATH:
3607                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3608                 if (error == 0) {
3609                         error = mesh_select_proto_path(vap, tmpproto);
3610                         if (error == 0)
3611                                 error = ENETRESET;
3612                 }
3613                 break;
3614         default:
3615                 return ENOSYS;
3616         }
3617         return error;
3618 }
3619 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);