sys/net80211/ieee80211_mesh.c

   1 /*-
   2  * Copyright (c) 2009 The FreeBSD Foundation
   3  * All rights reserved.
   4  *
   5  * This software was developed by Rui Paulo under sponsorship from the
   6  * FreeBSD Foundation.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 #include <sys/cdefs.h>
  30 #ifdef __FreeBSD__
  31 __FBSDID("$FreeBSD$");
  32 #endif
  33
  34 /*
  35  * IEEE 802.11s Mesh Point (MBSS) support.
  36  *
  37  * Based on March 2009, D3.0 802.11s draft spec.
  38  */
  39 #include "opt_inet.h"
  40 #include "opt_wlan.h"
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/malloc.h>
  46 #include <sys/kernel.h>
  47
  48 #include <sys/socket.h>
  49 #include <sys/sockio.h>
  50 #include <sys/endian.h>
  51 #include <sys/errno.h>
  52 #include <sys/proc.h>
  53 #include <sys/sysctl.h>
  54
  55 #include <net/bpf.h>
  56 #include <net/if.h>
  57 #include <net/if_var.h>
  58 #include <net/if_media.h>
  59 #include <net/if_llc.h>
  60 #include <net/ethernet.h>
  61
  62 #include <net80211/ieee80211_var.h>
  63 #include <net80211/ieee80211_action.h>
  64 #ifdef IEEE80211_SUPPORT_SUPERG
  65 #include <net80211/ieee80211_superg.h>
  66 #endif
  67 #include <net80211/ieee80211_input.h>
  68 #include <net80211/ieee80211_mesh.h>
  69
  70 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
  71 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
  72 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
  73 static void     mesh_vattach(struct ieee80211vap *);
  74 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  75 static void     mesh_rt_cleanup_cb(void *);
  76 static void     mesh_gatemode_setup(struct ieee80211vap *);
  77 static void     mesh_gatemode_cb(void *);
  78 static void     mesh_linkchange(struct ieee80211_node *,
  79                     enum ieee80211_mesh_mlstate);
  80 static void     mesh_checkid(void *, struct ieee80211_node *);
  81 static uint32_t mesh_generateid(struct ieee80211vap *);
  82 static int      mesh_checkpseq(struct ieee80211vap *,
  83                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
  84 static void     mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
  85                     struct ieee80211_mesh_route *);
  86 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
  87                     const struct ieee80211_meshcntl *);
  88 static int      mesh_input(struct ieee80211_node *, struct mbuf *,
  89                     const struct ieee80211_rx_stats *rxs, int, int);
  90 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
  91                     const struct ieee80211_rx_stats *rxs, int, int);
  92 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  93 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
  94 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
  95 static void     mesh_peer_timeout_cb(void *);
  96 static __inline void
  97                 mesh_peer_timeout_stop(struct ieee80211_node *);
  98 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
  99 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
 100 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
 101                     const uint8_t *);
 102 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
 103
 104 /*
 105  * Timeout values come from the specification and are in milliseconds.
 106  */
 107 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
 108     "IEEE 802.11s parameters");
 109 static int      ieee80211_mesh_gateint = -1;
 110 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW,
 111     &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
 112     "mesh gate interval (ms)");
 113 static int ieee80211_mesh_retrytimeout = -1;
 114 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
 115     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 116     "Retry timeout (msec)");
 117 static int ieee80211_mesh_holdingtimeout = -1;
 118
 119 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
 120     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 121     "Holding state timeout (msec)");
 122 static int ieee80211_mesh_confirmtimeout = -1;
 123 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
 124     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 125     "Confirm state timeout (msec)");
 126 static int ieee80211_mesh_backofftimeout = -1;
 127 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW,
 128     &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 129     "Backoff timeout (msec). This is to throutles peering forever when "
 130     "not receiving answer or is rejected by a neighbor");
 131 static int ieee80211_mesh_maxretries = 2;
 132 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW,
 133     &ieee80211_mesh_maxretries, 0,
 134     "Maximum retries during peer link establishment");
 135 static int ieee80211_mesh_maxholding = 2;
 136 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW,
 137     &ieee80211_mesh_maxholding, 0,
 138     "Maximum times we are allowed to transition to HOLDING state before "
 139     "backinoff during peer link establishment");
 140
 141 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
 142         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 143
 144 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
 145 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
 146 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
 147 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
 148 static  ieee80211_recv_action_func mesh_recv_action_meshgate;
 149
 150 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
 151 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
 152 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
 153 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
 154 static  ieee80211_send_action_func mesh_send_action_meshgate;
 155
 156 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
 157         .mpm_descr      = "AIRTIME",
 158         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
 159         .mpm_metric     = mesh_airtime_calc,
 160 };
 161
 162 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
 163 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
 164
 165 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
 166 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
 167 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
 168
 169 /* The longer one of the lifetime should be stored as new lifetime */
 170 #define MESH_ROUTE_LIFETIME_MAX(a, b)   (a > b ? a : b)
 171
 172 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
 173 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
 174
 175 /*
 176  * Helper functions to manipulate the Mesh routing table.
 177  */
 178
 179 static struct ieee80211_mesh_route *
 180 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
 181     const uint8_t dest[IEEE80211_ADDR_LEN])
 182 {
 183         struct ieee80211_mesh_route *rt;
 184
 185         MESH_RT_LOCK_ASSERT(ms);
 186
 187         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 188                 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
 189                         return rt;
 190         }
 191         return NULL;
 192 }
 193
 194 static struct ieee80211_mesh_route *
 195 mesh_rt_add_locked(struct ieee80211vap *vap,
 196     const uint8_t dest[IEEE80211_ADDR_LEN])
 197 {
 198         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 199         struct ieee80211_mesh_route *rt;
 200
 201         KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
 202             ("%s: adding broadcast to the routing table", __func__));
 203
 204         MESH_RT_LOCK_ASSERT(ms);
 205
 206         rt = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) +
 207             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT,
 208             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 209         if (rt != NULL) {
 210                 rt->rt_vap = vap;
 211                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
 212                 rt->rt_priv = (void *)ALIGN(&rt[1]);
 213                 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT");
 214                 callout_init(&rt->rt_discovery, 1);
 215                 rt->rt_updtime = ticks; /* create time */
 216                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
 217         }
 218         return rt;
 219 }
 220
 221 struct ieee80211_mesh_route *
 222 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
 223     const uint8_t dest[IEEE80211_ADDR_LEN])
 224 {
 225         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 226         struct ieee80211_mesh_route *rt;
 227
 228         MESH_RT_LOCK(ms);
 229         rt = mesh_rt_find_locked(ms, dest);
 230         MESH_RT_UNLOCK(ms);
 231         return rt;
 232 }
 233
 234 struct ieee80211_mesh_route *
 235 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
 236     const uint8_t dest[IEEE80211_ADDR_LEN])
 237 {
 238         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 239         struct ieee80211_mesh_route *rt;
 240
 241         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
 242             ("%s: duplicate entry in the routing table", __func__));
 243         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
 244             ("%s: adding self to the routing table", __func__));
 245
 246         MESH_RT_LOCK(ms);
 247         rt = mesh_rt_add_locked(vap, dest);
 248         MESH_RT_UNLOCK(ms);
 249         return rt;
 250 }
 251
 252 /*
 253  * Update the route lifetime and returns the updated lifetime.
 254  * If new_lifetime is zero and route is timedout it will be invalidated.
 255  * new_lifetime is in msec
 256  */
 257 int
 258 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
 259 {
 260         int timesince, now;
 261         uint32_t lifetime = 0;
 262
 263         KASSERT(rt != NULL, ("route is NULL"));
 264
 265         now = ticks;
 266         MESH_RT_ENTRY_LOCK(rt);
 267
 268         /* dont clobber a proxy entry gated by us */
 269         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
 270                 MESH_RT_ENTRY_UNLOCK(rt);
 271                 return rt->rt_lifetime;
 272         }
 273
 274         timesince = ticks_to_msecs(now - rt->rt_updtime);
 275         rt->rt_updtime = now;
 276         if (timesince >= rt->rt_lifetime) {
 277                 if (new_lifetime != 0) {
 278                         rt->rt_lifetime = new_lifetime;
 279                 }
 280                 else {
 281                         rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
 282                         rt->rt_lifetime = 0;
 283                 }
 284         } else {
 285                 /* update what is left of lifetime */
 286                 rt->rt_lifetime = rt->rt_lifetime - timesince;
 287                 rt->rt_lifetime  = MESH_ROUTE_LIFETIME_MAX(
 288                         new_lifetime, rt->rt_lifetime);
 289         }
 290         lifetime = rt->rt_lifetime;
 291         MESH_RT_ENTRY_UNLOCK(rt);
 292
 293         return lifetime;
 294 }
 295
 296 /*
 297  * Add a proxy route (as needed) for the specified destination.
 298  */
 299 void
 300 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
 301     const uint8_t dest[IEEE80211_ADDR_LEN])
 302 {
 303         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 304         struct ieee80211_mesh_route *rt;
 305
 306         MESH_RT_LOCK(ms);
 307         rt = mesh_rt_find_locked(ms, dest);
 308         if (rt == NULL) {
 309                 rt = mesh_rt_add_locked(vap, dest);
 310                 if (rt == NULL) {
 311                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 312                             "%s", "unable to add proxy entry");
 313                         vap->iv_stats.is_mesh_rtaddfailed++;
 314                 } else {
 315                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 316                             "%s", "add proxy entry");
 317                         IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
 318                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 319                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 320                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
 321                 }
 322         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 323                 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
 324                     ("no proxy flag for poxy entry"));
 325                 struct ieee80211com *ic = vap->iv_ic;
 326                 /*
 327                  * Fix existing entry created by received frames from
 328                  * stations that have some memory of dest.  We also
 329                  * flush any frames held on the staging queue; delivering
 330                  * them is too much trouble right now.
 331                  */
 332                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 333                     "%s", "fix proxy entry");
 334                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 335                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 336                              |  IEEE80211_MESHRT_FLAGS_PROXY;
 337                 /* XXX belongs in hwmp */
 338                 ieee80211_ageq_drain_node(&ic->ic_stageq,
 339                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
 340                 /* XXX stat? */
 341         }
 342         MESH_RT_UNLOCK(ms);
 343 }
 344
 345 static __inline void
 346 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
 347 {
 348         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
 349         /*
 350          * Grab the lock before destroying it, to be sure no one else
 351          * is holding the route.
 352          */
 353         MESH_RT_ENTRY_LOCK(rt);
 354         callout_drain(&rt->rt_discovery);
 355         MESH_RT_ENTRY_LOCK_DESTROY(rt);
 356         IEEE80211_FREE(rt, M_80211_MESH_RT);
 357 }
 358
 359 void
 360 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
 361     const uint8_t dest[IEEE80211_ADDR_LEN])
 362 {
 363         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 364         struct ieee80211_mesh_route *rt, *next;
 365
 366         MESH_RT_LOCK(ms);
 367         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 368                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
 369                         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
 370                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 371                                     IEEE80211_REASON_MESH_PERR_NO_PROXY);
 372                         } else {
 373                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 374                                     IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
 375                         }
 376                         mesh_rt_del(ms, rt);
 377                         MESH_RT_UNLOCK(ms);
 378                         return;
 379                 }
 380         }
 381         MESH_RT_UNLOCK(ms);
 382 }
 383
 384 void
 385 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
 386 {
 387         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 388         struct ieee80211_mesh_route *rt, *next;
 389
 390         if (ms == NULL)
 391                 return;
 392         MESH_RT_LOCK(ms);
 393         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
 394                 mesh_rt_del(ms, rt);
 395         MESH_RT_UNLOCK(ms);
 396 }
 397
 398 void
 399 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
 400     const uint8_t peer[IEEE80211_ADDR_LEN])
 401 {
 402         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 403         struct ieee80211_mesh_route *rt, *next;
 404
 405         MESH_RT_LOCK(ms);
 406         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 407                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
 408                         mesh_rt_del(ms, rt);
 409         }
 410         MESH_RT_UNLOCK(ms);
 411 }
 412
 413 /*
 414  * Flush expired routing entries, i.e. those in invalid state for
 415  * some time.
 416  */
 417 static void
 418 mesh_rt_flush_invalid(struct ieee80211vap *vap)
 419 {
 420         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 421         struct ieee80211_mesh_route *rt, *next;
 422
 423         if (ms == NULL)
 424                 return;
 425         MESH_RT_LOCK(ms);
 426         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 427                 /* Discover paths will be deleted by their own callout */
 428                 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
 429                         continue;
 430                 ieee80211_mesh_rt_update(rt, 0);
 431                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
 432                         mesh_rt_del(ms, rt);
 433         }
 434         MESH_RT_UNLOCK(ms);
 435 }
 436
 437 #define N(a)    (sizeof(a) / sizeof(a[0]))
 438 int
 439 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
 440 {
 441         int i, firstempty = -1;
 442
 443         for (i = 0; i < N(mesh_proto_paths); i++) {
 444                 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
 445                     IEEE80211_MESH_PROTO_DSZ) == 0)
 446                         return EEXIST;
 447                 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
 448                         firstempty = i;
 449         }
 450         if (firstempty < 0)
 451                 return ENOSPC;
 452         memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
 453         mesh_proto_paths[firstempty].mpp_active = 1;
 454         return 0;
 455 }
 456
 457 int
 458 ieee80211_mesh_register_proto_metric(const struct
 459     ieee80211_mesh_proto_metric *mpm)
 460 {
 461         int i, firstempty = -1;
 462
 463         for (i = 0; i < N(mesh_proto_metrics); i++) {
 464                 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
 465                     IEEE80211_MESH_PROTO_DSZ) == 0)
 466                         return EEXIST;
 467                 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
 468                         firstempty = i;
 469         }
 470         if (firstempty < 0)
 471                 return ENOSPC;
 472         memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
 473         mesh_proto_metrics[firstempty].mpm_active = 1;
 474         return 0;
 475 }
 476
 477 static int
 478 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
 479 {
 480         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 481         int i;
 482
 483         for (i = 0; i < N(mesh_proto_paths); i++) {
 484                 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
 485                         ms->ms_ppath = &mesh_proto_paths[i];
 486                         return 0;
 487                 }
 488         }
 489         return ENOENT;
 490 }
 491
 492 static int
 493 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
 494 {
 495         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 496         int i;
 497
 498         for (i = 0; i < N(mesh_proto_metrics); i++) {
 499                 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
 500                         ms->ms_pmetric = &mesh_proto_metrics[i];
 501                         return 0;
 502                 }
 503         }
 504         return ENOENT;
 505 }
 506 #undef  N
 507
 508 static void
 509 mesh_gatemode_setup(struct ieee80211vap *vap)
 510 {
 511         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 512
 513         /*
 514          * NB: When a mesh gate is running as a ROOT it shall
 515          * not send out periodic GANNs but instead mark the
 516          * mesh gate flag for the corresponding proactive PREQ
 517          * and RANN frames.
 518          */
 519         if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
 520             (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
 521                 callout_drain(&ms->ms_gatetimer);
 522                 return ;
 523         }
 524         callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
 525             mesh_gatemode_cb, vap);
 526 }
 527
 528 static void
 529 mesh_gatemode_cb(void *arg)
 530 {
 531         struct ieee80211vap *vap = (struct ieee80211vap *)arg;
 532         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 533         struct ieee80211_meshgann_ie gann;
 534
 535         gann.gann_flags = 0; /* Reserved */
 536         gann.gann_hopcount = 0;
 537         gann.gann_ttl = ms->ms_ttl;
 538         IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
 539         gann.gann_seq = ms->ms_gateseq++;
 540         gann.gann_interval = ieee80211_mesh_gateint;
 541
 542         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
 543             "send broadcast GANN (seq %u)", gann.gann_seq);
 544
 545         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
 546             IEEE80211_ACTION_MESH_GANN, &gann);
 547         mesh_gatemode_setup(vap);
 548 }
 549
 550 static void
 551 ieee80211_mesh_init(void)
 552 {
 553
 554         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
 555         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
 556
 557         /*
 558          * Setup mesh parameters that depends on the clock frequency.
 559          */
 560         ieee80211_mesh_gateint = msecs_to_ticks(10000);
 561         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
 562         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
 563         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
 564         ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
 565
 566         /*
 567          * Register action frame handlers.
 568          */
 569         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 570             IEEE80211_ACTION_MESHPEERING_OPEN,
 571             mesh_recv_action_meshpeering_open);
 572         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 573             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 574             mesh_recv_action_meshpeering_confirm);
 575         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 576             IEEE80211_ACTION_MESHPEERING_CLOSE,
 577             mesh_recv_action_meshpeering_close);
 578         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 579             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
 580         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 581             IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
 582
 583         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 584             IEEE80211_ACTION_MESHPEERING_OPEN,
 585             mesh_send_action_meshpeering_open);
 586         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 587             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 588             mesh_send_action_meshpeering_confirm);
 589         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 590             IEEE80211_ACTION_MESHPEERING_CLOSE,
 591             mesh_send_action_meshpeering_close);
 592         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 593             IEEE80211_ACTION_MESH_LMETRIC,
 594             mesh_send_action_meshlmetric);
 595         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 596             IEEE80211_ACTION_MESH_GANN,
 597             mesh_send_action_meshgate);
 598
 599         /*
 600          * Register Airtime Link Metric.
 601          */
 602         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
 603
 604 }
 605 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
 606
 607 void
 608 ieee80211_mesh_attach(struct ieee80211com *ic)
 609 {
 610         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
 611 }
 612
 613 void
 614 ieee80211_mesh_detach(struct ieee80211com *ic)
 615 {
 616 }
 617
 618 static void
 619 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
 620 {
 621         struct ieee80211com *ic = ni->ni_ic;
 622         uint16_t args[3];
 623
 624         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
 625                 args[0] = ni->ni_mlpid;
 626                 args[1] = ni->ni_mllid;
 627                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 628                 ieee80211_send_action(ni,
 629                     IEEE80211_ACTION_CAT_SELF_PROT,
 630                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 631                     args);
 632         }
 633         callout_drain(&ni->ni_mltimer);
 634         /* XXX belongs in hwmp */
 635         ieee80211_ageq_drain_node(&ic->ic_stageq,
 636            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
 637 }
 638
 639 static void
 640 mesh_vdetach(struct ieee80211vap *vap)
 641 {
 642         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 643
 644         callout_drain(&ms->ms_cleantimer);
 645         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
 646             NULL);
 647         ieee80211_mesh_rt_flush(vap);
 648         MESH_RT_LOCK_DESTROY(ms);
 649         ms->ms_ppath->mpp_vdetach(vap);
 650         IEEE80211_FREE(vap->iv_mesh, M_80211_VAP);
 651         vap->iv_mesh = NULL;
 652 }
 653
 654 static void
 655 mesh_vattach(struct ieee80211vap *vap)
 656 {
 657         struct ieee80211_mesh_state *ms;
 658         vap->iv_newstate = mesh_newstate;
 659         vap->iv_input = mesh_input;
 660         vap->iv_opdetach = mesh_vdetach;
 661         vap->iv_recv_mgmt = mesh_recv_mgmt;
 662         vap->iv_recv_ctl = mesh_recv_ctl;
 663         ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
 664             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 665         if (ms == NULL) {
 666                 printf("%s: couldn't alloc MBSS state\n", __func__);
 667                 return;
 668         }
 669         vap->iv_mesh = ms;
 670         ms->ms_seq = 0;
 671         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
 672         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
 673         TAILQ_INIT(&ms->ms_known_gates);
 674         TAILQ_INIT(&ms->ms_routes);
 675         MESH_RT_LOCK_INIT(ms, "MBSS");
 676         callout_init(&ms->ms_cleantimer, 1);
 677         callout_init(&ms->ms_gatetimer, 1);
 678         ms->ms_gateseq = 0;
 679         mesh_select_proto_metric(vap, "AIRTIME");
 680         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
 681         mesh_select_proto_path(vap, "HWMP");
 682         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
 683         ms->ms_ppath->mpp_vattach(vap);
 684 }
 685
 686 /*
 687  * IEEE80211_M_MBSS vap state machine handler.
 688  */
 689 static int
 690 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 691 {
 692         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 693         struct ieee80211com *ic = vap->iv_ic;
 694         struct ieee80211_node *ni;
 695         enum ieee80211_state ostate;
 696
 697         IEEE80211_LOCK_ASSERT(ic);
 698
 699         ostate = vap->iv_state;
 700         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 701             __func__, ieee80211_state_name[ostate],
 702             ieee80211_state_name[nstate], arg);
 703         vap->iv_state = nstate;         /* state transition */
 704         if (ostate != IEEE80211_S_SCAN)
 705                 ieee80211_cancel_scan(vap);     /* background scan */
 706         ni = vap->iv_bss;                       /* NB: no reference held */
 707         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
 708                 callout_drain(&ms->ms_cleantimer);
 709                 callout_drain(&ms->ms_gatetimer);
 710         }
 711         switch (nstate) {
 712         case IEEE80211_S_INIT:
 713                 switch (ostate) {
 714                 case IEEE80211_S_SCAN:
 715                         ieee80211_cancel_scan(vap);
 716                         break;
 717                 case IEEE80211_S_CAC:
 718                         ieee80211_dfs_cac_stop(vap);
 719                         break;
 720                 case IEEE80211_S_RUN:
 721                         ieee80211_iterate_nodes(&ic->ic_sta,
 722                             mesh_vdetach_peers, NULL);
 723                         break;
 724                 default:
 725                         break;
 726                 }
 727                 if (ostate != IEEE80211_S_INIT) {
 728                         /* NB: optimize INIT -> INIT case */
 729                         ieee80211_reset_bss(vap);
 730                         ieee80211_mesh_rt_flush(vap);
 731                 }
 732                 break;
 733         case IEEE80211_S_SCAN:
 734                 switch (ostate) {
 735                 case IEEE80211_S_INIT:
 736                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 737                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
 738                             ms->ms_idlen != 0) {
 739                                 /*
 740                                  * Already have a channel and a mesh ID; bypass
 741                                  * the scan and startup immediately.
 742                                  */
 743                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 744                                 break;
 745                         }
 746                         /*
 747                          * Initiate a scan.  We can come here as a result
 748                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 749                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 750                          * and the scan request parameters will be present
 751                          * in iv_scanreq.  Otherwise we do the default.
 752                         */
 753                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 754                                 ieee80211_check_scan(vap,
 755                                     vap->iv_scanreq_flags,
 756                                     vap->iv_scanreq_duration,
 757                                     vap->iv_scanreq_mindwell,
 758                                     vap->iv_scanreq_maxdwell,
 759                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 760                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 761                         } else
 762                                 ieee80211_check_scan_current(vap);
 763                         break;
 764                 default:
 765                         break;
 766                 }
 767                 break;
 768         case IEEE80211_S_CAC:
 769                 /*
 770                  * Start CAC on a DFS channel.  We come here when starting
 771                  * a bss on a DFS channel (see ieee80211_create_ibss).
 772                  */
 773                 ieee80211_dfs_cac_start(vap);
 774                 break;
 775         case IEEE80211_S_RUN:
 776                 switch (ostate) {
 777                 case IEEE80211_S_INIT:
 778                         /*
 779                          * Already have a channel; bypass the
 780                          * scan and startup immediately.
 781                          * Note that ieee80211_create_ibss will call
 782                          * back to do a RUN->RUN state change.
 783                          */
 784                         ieee80211_create_ibss(vap,
 785                             ieee80211_ht_adjust_channel(ic,
 786                                 ic->ic_curchan, vap->iv_flags_ht));
 787                         /* NB: iv_bss is changed on return */
 788                         break;
 789                 case IEEE80211_S_CAC:
 790                         /*
 791                          * NB: This is the normal state change when CAC
 792                          * expires and no radar was detected; no need to
 793                          * clear the CAC timer as it's already expired.
 794                          */
 795                         /* fall thru... */
 796                 case IEEE80211_S_CSA:
 797 #if 0
 798                         /*
 799                          * Shorten inactivity timer of associated stations
 800                          * to weed out sta's that don't follow a CSA.
 801                          */
 802                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 803 #endif
 804                         /*
 805                          * Update bss node channel to reflect where
 806                          * we landed after CSA.
 807                          */
 808                         ieee80211_node_set_chan(vap->iv_bss,
 809                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 810                                 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
 811                         /* XXX bypass debug msgs */
 812                         break;
 813                 case IEEE80211_S_SCAN:
 814                 case IEEE80211_S_RUN:
 815 #ifdef IEEE80211_DEBUG
 816                         if (ieee80211_msg_debug(vap)) {
 817                                 struct ieee80211_node *ni = vap->iv_bss;
 818                                 ieee80211_note(vap,
 819                                     "synchronized with %s meshid ",
 820                                     ether_sprintf(ni->ni_meshid));
 821                                 ieee80211_print_essid(ni->ni_meshid,
 822                                     ni->ni_meshidlen);
 823                                 /* XXX MCS/HT */
 824                                 printf(" channel %d\n",
 825                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
 826                         }
 827 #endif
 828                         break;
 829                 default:
 830                         break;
 831                 }
 832                 ieee80211_node_authorize(vap->iv_bss);
 833                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 834                     mesh_rt_cleanup_cb, vap);
 835                 mesh_gatemode_setup(vap);
 836                 break;
 837         default:
 838                 break;
 839         }
 840         /* NB: ostate not nstate */
 841         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
 842         return 0;
 843 }
 844
 845 static void
 846 mesh_rt_cleanup_cb(void *arg)
 847 {
 848         struct ieee80211vap *vap = arg;
 849         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 850
 851         mesh_rt_flush_invalid(vap);
 852         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 853             mesh_rt_cleanup_cb, vap);
 854 }
 855
 856 /*
 857  * Mark a mesh STA as gate and return a pointer to it.
 858  * If this is first time, we create a new gate route.
 859  * Always update the path route to this mesh gate.
 860  */
 861 struct ieee80211_mesh_gate_route *
 862 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
 863     struct ieee80211_mesh_route *rt)
 864 {
 865         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 866         struct ieee80211_mesh_gate_route *gr = NULL, *next;
 867         int found = 0;
 868
 869         MESH_RT_LOCK(ms);
 870         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
 871                 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
 872                         found = 1;
 873                         break;
 874                 }
 875         }
 876
 877         if (!found) {
 878                 /* New mesh gate add it to known table. */
 879                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
 880                     "%s", "stored new gate information from pro-PREQ.");
 881                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
 882                     M_80211_MESH_GT_RT,
 883                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 884                 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
 885                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
 886         }
 887         gr->gr_route = rt;
 888         /* TODO: link from path route to gate route */
 889         MESH_RT_UNLOCK(ms);
 890
 891         return gr;
 892 }
 893
 894
 895 /*
 896  * Helper function to note the Mesh Peer Link FSM change.
 897  */
 898 static void
 899 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
 900 {
 901         struct ieee80211vap *vap = ni->ni_vap;
 902         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 903 #ifdef IEEE80211_DEBUG
 904         static const char *meshlinkstates[] = {
 905                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
 906                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
 907                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
 908                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
 909                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
 910                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
 911         };
 912 #endif
 913         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
 914             ni, "peer link: %s -> %s",
 915             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
 916
 917         /* track neighbor count */
 918         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
 919             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 920                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
 921                 ms->ms_neighbors++;
 922                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 923         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
 924             state != IEEE80211_NODE_MESH_ESTABLISHED) {
 925                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
 926                 ms->ms_neighbors--;
 927                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 928         }
 929         ni->ni_mlstate = state;
 930         switch (state) {
 931         case IEEE80211_NODE_MESH_HOLDING:
 932                 ms->ms_ppath->mpp_peerdown(ni);
 933                 break;
 934         case IEEE80211_NODE_MESH_ESTABLISHED:
 935                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
 936                 break;
 937         default:
 938                 break;
 939         }
 940 }
 941
 942 /*
 943  * Helper function to generate a unique local ID required for mesh
 944  * peer establishment.
 945  */
 946 static void
 947 mesh_checkid(void *arg, struct ieee80211_node *ni)
 948 {
 949         uint16_t *r = arg;
 950
 951         if (*r == ni->ni_mllid)
 952                 *(uint16_t *)arg = 0;
 953 }
 954
 955 static uint32_t
 956 mesh_generateid(struct ieee80211vap *vap)
 957 {
 958         int maxiter = 4;
 959         uint16_t r;
 960
 961         do {
 962                 get_random_bytes(&r, 2);
 963                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
 964                 maxiter--;
 965         } while (r == 0 && maxiter > 0);
 966         return r;
 967 }
 968
 969 /*
 970  * Verifies if we already received this packet by checking its
 971  * sequence number.
 972  * Returns 0 if the frame is to be accepted, 1 otherwise.
 973  */
 974 static int
 975 mesh_checkpseq(struct ieee80211vap *vap,
 976     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
 977 {
 978         struct ieee80211_mesh_route *rt;
 979
 980         rt = ieee80211_mesh_rt_find(vap, source);
 981         if (rt == NULL) {
 982                 rt = ieee80211_mesh_rt_add(vap, source);
 983                 if (rt == NULL) {
 984                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 985                             "%s", "add mcast route failed");
 986                         vap->iv_stats.is_mesh_rtaddfailed++;
 987                         return 1;
 988                 }
 989                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 990                     "add mcast route, mesh seqno %d", seq);
 991                 rt->rt_lastmseq = seq;
 992                 return 0;
 993         }
 994         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
 995                 return 1;
 996         } else {
 997                 rt->rt_lastmseq = seq;
 998                 return 0;
 999         }
1000 }
1001
1002 /*
1003  * Iterate the routing table and locate the next hop.
1004  */
1005 struct ieee80211_node *
1006 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1007     const uint8_t dest[IEEE80211_ADDR_LEN])
1008 {
1009         struct ieee80211_mesh_route *rt;
1010
1011         rt = ieee80211_mesh_rt_find(vap, dest);
1012         if (rt == NULL)
1013                 return NULL;
1014         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1015                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1016                     "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1017                 /* XXX stat */
1018                 return NULL;
1019         }
1020         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1021                 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1022                 if (rt == NULL) return NULL;
1023                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1024                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1025                             "%s: meshgate !valid, flags 0x%x", __func__,
1026                             rt->rt_flags);
1027                         /* XXX stat */
1028                         return NULL;
1029                 }
1030         }
1031         return ieee80211_find_txnode(vap, rt->rt_nexthop);
1032 }
1033
1034 static void
1035 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1036     struct ieee80211_mesh_route *rt_gate)
1037 {
1038         struct ifnet *ifp = vap->iv_ifp;
1039         struct ieee80211_node *ni;
1040
1041         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1042
1043         ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1044         if (ni == NULL) {
1045                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1046                 m_freem(m);
1047                 return;
1048         }
1049
1050         /*
1051          * Send through the VAP packet transmit path.
1052          * This consumes the node ref grabbed above and
1053          * the mbuf, regardless of whether there's a problem
1054          * or not.
1055          */
1056         (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1057 }
1058
1059 /*
1060  * Forward the queued frames to known valid mesh gates.
1061  * Assume destination to be outside the MBSS (i.e. proxy entry),
1062  * If no valid mesh gates are known silently discard queued frames.
1063  * After transmitting frames to all known valid mesh gates, this route
1064  * will be marked invalid, and a new path discovery will happen in the hopes
1065  * that (at least) one of the mesh gates have a new proxy entry for us to use.
1066  */
1067 void
1068 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1069     struct ieee80211_mesh_route *rt_dest)
1070 {
1071         struct ieee80211com *ic = vap->iv_ic;
1072         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1073         struct ieee80211_mesh_route *rt_gate;
1074         struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1075         struct mbuf *m, *mcopy, *next;
1076
1077         IEEE80211_TX_UNLOCK_ASSERT(ic);
1078
1079         KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1080             ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1081
1082         /* XXX: send to more than one valid mash gate */
1083         MESH_RT_LOCK(ms);
1084
1085         m = ieee80211_ageq_remove(&ic->ic_stageq,
1086             (struct ieee80211_node *)(uintptr_t)
1087             ieee80211_mac_hash(ic, rt_dest->rt_dest));
1088
1089         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1090                 rt_gate = gr->gr_route;
1091                 if (rt_gate == NULL) {
1092                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1093                                 rt_dest->rt_dest,
1094                                 "mesh gate with no path %6D",
1095                                 gr->gr_addr, ":");
1096                         continue;
1097                 }
1098                 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1099                         continue;
1100                 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1101                     ("route not marked as a mesh gate"));
1102                 KASSERT((rt_gate->rt_flags &
1103                         IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1104                         ("found mesh gate that is also marked porxy"));
1105                 /*
1106                  * convert route to a proxy route gated by the current
1107                  * mesh gate, this is needed so encap can built data
1108                  * frame with correct address.
1109                  */
1110                 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1111                         IEEE80211_MESHRT_FLAGS_VALID;
1112                 rt_dest->rt_ext_seq = 1; /* random value */
1113                 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1114                 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1115                 rt_dest->rt_metric = rt_gate->rt_metric;
1116                 rt_dest->rt_nhops = rt_gate->rt_nhops;
1117                 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1118                 MESH_RT_UNLOCK(ms);
1119                 /* XXX: lock?? */
1120                 mcopy = m_dup(m, M_NOWAIT);
1121                 for (; mcopy != NULL; mcopy = next) {
1122                         next = mcopy->m_nextpkt;
1123                         mcopy->m_nextpkt = NULL;
1124                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1125                             rt_dest->rt_dest,
1126                             "flush queued frame %p len %d", mcopy,
1127                             mcopy->m_pkthdr.len);
1128                         mesh_transmit_to_gate(vap, mcopy, rt_gate);
1129                 }
1130                 MESH_RT_LOCK(ms);
1131         }
1132         rt_dest->rt_flags = 0; /* Mark invalid */
1133         m_freem(m);
1134         MESH_RT_UNLOCK(ms);
1135 }
1136
1137 /*
1138  * Forward the specified frame.
1139  * Decrement the TTL and set TA to our MAC address.
1140  */
1141 static void
1142 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1143     const struct ieee80211_meshcntl *mc)
1144 {
1145         struct ieee80211com *ic = vap->iv_ic;
1146         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1147         struct ifnet *ifp = vap->iv_ifp;
1148         const struct ieee80211_frame *wh =
1149             mtod(m, const struct ieee80211_frame *);
1150         struct mbuf *mcopy;
1151         struct ieee80211_meshcntl *mccopy;
1152         struct ieee80211_frame *whcopy;
1153         struct ieee80211_node *ni;
1154         int err;
1155
1156         /* This is called from the RX path - don't hold this lock */
1157         IEEE80211_TX_UNLOCK_ASSERT(ic);
1158
1159         /*
1160          * mesh ttl of 1 means we are the last one receving it,
1161          * according to amendment we decrement and then check if
1162          * 0, if so we dont forward.
1163          */
1164         if (mc->mc_ttl < 1) {
1165                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1166                     "%s", "frame not fwd'd, ttl 1");
1167                 vap->iv_stats.is_mesh_fwd_ttl++;
1168                 return;
1169         }
1170         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1171                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1172                     "%s", "frame not fwd'd, fwding disabled");
1173                 vap->iv_stats.is_mesh_fwd_disabled++;
1174                 return;
1175         }
1176         mcopy = m_dup(m, M_NOWAIT);
1177         if (mcopy == NULL) {
1178                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1179                     "%s", "frame not fwd'd, cannot dup");
1180                 vap->iv_stats.is_mesh_fwd_nobuf++;
1181                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1182                 return;
1183         }
1184         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1185             sizeof(struct ieee80211_meshcntl));
1186         if (mcopy == NULL) {
1187                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1188                     "%s", "frame not fwd'd, too short");
1189                 vap->iv_stats.is_mesh_fwd_tooshort++;
1190                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1191                 m_freem(mcopy);
1192                 return;
1193         }
1194         whcopy = mtod(mcopy, struct ieee80211_frame *);
1195         mccopy = (struct ieee80211_meshcntl *)
1196             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1197         /* XXX clear other bits? */
1198         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1199         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1200         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1201                 ni = ieee80211_ref_node(vap->iv_bss);
1202                 mcopy->m_flags |= M_MCAST;
1203         } else {
1204                 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1205                 if (ni == NULL) {
1206                         /*
1207                          * [Optional] any of the following three actions:
1208                          * o silently discard
1209                          * o trigger a path discovery
1210                          * o inform TA that meshDA is unknown.
1211                          */
1212                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1213                             "%s", "frame not fwd'd, no path");
1214                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1215                             IEEE80211_REASON_MESH_PERR_NO_FI);
1216                         vap->iv_stats.is_mesh_fwd_nopath++;
1217                         m_freem(mcopy);
1218                         return;
1219                 }
1220                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1221         }
1222         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1223         mccopy->mc_ttl--;
1224
1225         /* XXX calculate priority so drivers can find the tx queue */
1226         M_WME_SETAC(mcopy, WME_AC_BE);
1227
1228         /* XXX do we know m_nextpkt is NULL? */
1229         mcopy->m_pkthdr.rcvif = (void *) ni;
1230
1231         /*
1232          * XXX this bypasses all of the VAP TX handling; it passes frames
1233          * directly to the parent interface.
1234          *
1235          * Because of this, there's no TX lock being held as there's no
1236          * encaps state being used.
1237          *
1238          * Doing a direct parent transmit may not be the correct thing
1239          * to do here; we'll have to re-think this soon.
1240          */
1241         IEEE80211_TX_LOCK(ic);
1242         err = ieee80211_parent_xmitpkt(ic, mcopy);
1243         IEEE80211_TX_UNLOCK(ic);
1244         if (err != 0) {
1245                 /* NB: IFQ_HANDOFF reclaims mbuf */
1246                 ieee80211_free_node(ni);
1247         } else {
1248                 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
1249         }
1250 }
1251
1252 static struct mbuf *
1253 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1254 {
1255 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1256 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1257         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1258                   sizeof(struct ieee80211_meshcntl_ae10)];
1259         const struct ieee80211_qosframe_addr4 *wh;
1260         const struct ieee80211_meshcntl_ae10 *mc;
1261         struct ether_header *eh;
1262         struct llc *llc;
1263         int ae;
1264
1265         if (m->m_len < hdrlen + sizeof(*llc) &&
1266             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1267                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1268                     "discard data frame: %s", "m_pullup failed");
1269                 vap->iv_stats.is_rx_tooshort++;
1270                 return NULL;
1271         }
1272         memcpy(b, mtod(m, caddr_t), hdrlen);
1273         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1274         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1275         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1276                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1277             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1278
1279         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1280         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1281             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1282             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1283             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1284             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1285               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1286                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1287                 llc = NULL;
1288         } else {
1289                 m_adj(m, hdrlen - sizeof(*eh));
1290         }
1291         eh = mtod(m, struct ether_header *);
1292         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1293         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1294                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1295                 if (ae == IEEE80211_MESH_AE_00) {
1296                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1297                 } else if (ae == IEEE80211_MESH_AE_01) {
1298                         IEEE80211_ADDR_COPY(eh->ether_shost,
1299                             MC01(mc)->mc_addr4);
1300                 } else {
1301                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1302                             (const struct ieee80211_frame *)wh, NULL,
1303                             "bad AE %d", ae);
1304                         vap->iv_stats.is_mesh_badae++;
1305                         m_freem(m);
1306                         return NULL;
1307                 }
1308         } else {
1309                 if (ae == IEEE80211_MESH_AE_00) {
1310                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1311                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1312                 } else if (ae == IEEE80211_MESH_AE_10) {
1313                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1314                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1315                 } else {
1316                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1317                             (const struct ieee80211_frame *)wh, NULL,
1318                             "bad AE %d", ae);
1319                         vap->iv_stats.is_mesh_badae++;
1320                         m_freem(m);
1321                         return NULL;
1322                 }
1323         }
1324 #ifndef __NO_STRICT_ALIGNMENT
1325         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1326                 m = ieee80211_realign(vap, m, sizeof(*eh));
1327                 if (m == NULL)
1328                         return NULL;
1329         }
1330 #endif /* !__NO_STRICT_ALIGNMENT */
1331         if (llc != NULL) {
1332                 eh = mtod(m, struct ether_header *);
1333                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1334         }
1335         return m;
1336 #undef  WDIR
1337 #undef  MC01
1338 }
1339
1340 /*
1341  * Return non-zero if the unicast mesh data frame should be processed
1342  * locally.  Frames that are not proxy'd have our address, otherwise
1343  * we need to consult the routing table to look for a proxy entry.
1344  */
1345 static __inline int
1346 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1347     const struct ieee80211_meshcntl *mc)
1348 {
1349         int ae = mc->mc_flags & 3;
1350
1351         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1352             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1353         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1354             ("bad AE %d", ae));
1355         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
1356                 const struct ieee80211_meshcntl_ae10 *mc10 =
1357                     (const struct ieee80211_meshcntl_ae10 *) mc;
1358                 struct ieee80211_mesh_route *rt =
1359                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1360                 /* check for proxy route to ourself */
1361                 return (rt != NULL &&
1362                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1363         } else                                  /* ucast w/o proxy */
1364                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1365 }
1366
1367 /*
1368  * Verifies transmitter, updates lifetime, precursor list and forwards data.
1369  * > 0 means we have forwarded data and no need to process locally
1370  * == 0 means we want to process locally (and we may have forwarded data
1371  * < 0 means there was an error and data should be discarded
1372  */
1373 static int
1374 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1375     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1376 {
1377         struct ieee80211_qosframe_addr4 *qwh;
1378         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1379         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1380
1381         /* This is called from the RX path - don't hold this lock */
1382         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1383
1384         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1385
1386         /*
1387          * TODO:
1388          * o verify addr2 is  a legitimate transmitter
1389          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1390          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1391          */
1392
1393         /* set lifetime of addr3 (meshDA) to initial value */
1394         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1395         if (rt_meshda == NULL) {
1396                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1397                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
1398                 /*
1399                  * [Optional] any of the following three actions:
1400                  * o silently discard                           [X]
1401                  * o trigger a path discovery                   [ ]
1402                  * o inform TA that meshDA is unknown.          [ ]
1403                  */
1404                 /* XXX: stats */
1405                 return (-1);
1406         }
1407
1408         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1409             ms->ms_ppath->mpp_inact));
1410
1411         /* set lifetime of addr4 (meshSA) to initial value */
1412         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1413         KASSERT(rt_meshsa != NULL, ("no route"));
1414         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1415             ms->ms_ppath->mpp_inact));
1416
1417         mesh_forward(vap, m, mc);
1418         return (1); /* dont process locally */
1419 }
1420
1421 /*
1422  * Verifies transmitter, updates lifetime, precursor list and process data
1423  * locally, if data is proxy with AE = 10 it could mean data should go
1424  * on another mesh path or data should be forwarded to the DS.
1425  *
1426  * > 0 means we have forwarded data and no need to process locally
1427  * == 0 means we want to process locally (and we may have forwarded data
1428  * < 0 means there was an error and data should be discarded
1429  */
1430 static int
1431 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1432     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1433 {
1434         struct ieee80211_qosframe_addr4 *qwh;
1435         const struct ieee80211_meshcntl_ae10 *mc10;
1436         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1437         struct ieee80211_mesh_route *rt;
1438         int ae;
1439
1440         /* This is called from the RX path - don't hold this lock */
1441         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1442
1443         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1444         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1445
1446         /*
1447          * TODO:
1448          * o verify addr2 is  a legitimate transmitter
1449          * o lifetime of precursor entry is max(init, curr)
1450          */
1451
1452         /* set lifetime of addr4 (meshSA) to initial value */
1453         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1454         KASSERT(rt != NULL, ("no route"));
1455         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1456         rt = NULL;
1457
1458         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1459         KASSERT(ae == IEEE80211_MESH_AE_00 ||
1460             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1461         if (ae == IEEE80211_MESH_AE_10) {
1462                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1463                         return (0); /* process locally */
1464                 }
1465
1466                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1467                 if (rt != NULL &&
1468                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1469                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1470                         /*
1471                          * Forward on another mesh-path, according to
1472                          * amendment as specified in 9.32.4.1
1473                          */
1474                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1475                         mesh_forward(vap, m,
1476                             (const struct ieee80211_meshcntl *)mc10);
1477                         return (1); /* dont process locally */
1478                 }
1479                 /*
1480                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
1481                  * addressed according to 13.11.3.2.
1482                  */
1483                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1484                     "forward frame to DS, SA(%6D) DA(%6D)",
1485                     mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1486         }
1487         return (0); /* process locally */
1488 }
1489
1490 /*
1491  * Try to forward the group addressed data on to other mesh STAs, and
1492  * also to the DS.
1493  *
1494  * > 0 means we have forwarded data and no need to process locally
1495  * == 0 means we want to process locally (and we may have forwarded data
1496  * < 0 means there was an error and data should be discarded
1497  */
1498 static int
1499 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1500     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1501 {
1502 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1503         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1504
1505         /* This is called from the RX path - don't hold this lock */
1506         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1507
1508         mesh_forward(vap, m, mc);
1509
1510         if(mc->mc_ttl > 0) {
1511                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1512                         /*
1513                          * Forward of MSDUs from the MBSS to DS group addressed
1514                          * (according to 13.11.3.2)
1515                          * This happens by delivering the packet, and a bridge
1516                          * will sent it on another port member.
1517                          */
1518                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1519                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
1520                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1521                                     MC01(mc)->mc_addr4, "%s",
1522                                     "forward from MBSS to the DS");
1523                 }
1524         }
1525         return (0); /* process locally */
1526 #undef  MC01
1527 }
1528
1529 static int
1530 mesh_input(struct ieee80211_node *ni, struct mbuf *m,
1531     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1532 {
1533 #define HAS_SEQ(type)   ((type & 0x4) == 0)
1534 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1535 #define MC10(mc)        ((const struct ieee80211_meshcntl_ae10 *)mc)
1536         struct ieee80211vap *vap = ni->ni_vap;
1537         struct ieee80211com *ic = ni->ni_ic;
1538         struct ifnet *ifp = vap->iv_ifp;
1539         struct ieee80211_frame *wh;
1540         const struct ieee80211_meshcntl *mc;
1541         int hdrspace, meshdrlen, need_tap, error;
1542         uint8_t dir, type, subtype, ae;
1543         uint32_t seq;
1544         const uint8_t *addr;
1545         uint8_t qos[2];
1546         ieee80211_seq rxseq;
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                         rxseq = le16toh(*(uint16_t *)wh->i_seq);
1592                         if (! ieee80211_check_rxseq(ni, wh)) {
1593                                 /* duplicate, discard */
1594                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1595                                     wh->i_addr1, "duplicate",
1596                                     "seqno <%u,%u> fragno <%u,%u> tid %u",
1597                                     rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
1598                                     ni->ni_rxseqs[tid] >>
1599                                     IEEE80211_SEQ_SEQ_SHIFT,
1600                                     rxseq & IEEE80211_SEQ_FRAG_MASK,
1601                                     ni->ni_rxseqs[tid] &
1602                                     IEEE80211_SEQ_FRAG_MASK,
1603                                     tid);
1604                                 vap->iv_stats.is_rx_dup++;
1605                                 IEEE80211_NODE_STAT(ni, rx_dup);
1606                                 goto out;
1607                         }
1608                         ni->ni_rxseqs[tid] = rxseq;
1609                 }
1610         }
1611 #ifdef IEEE80211_DEBUG
1612         /*
1613          * It's easier, but too expensive, to simulate different mesh
1614          * topologies by consulting the ACL policy very early, so do this
1615          * only under DEBUG.
1616          *
1617          * NB: this check is also done upon peering link initiation.
1618          */
1619         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1620                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1621                     wh, NULL, "%s", "disallowed by ACL");
1622                 vap->iv_stats.is_rx_acl++;
1623                 goto out;
1624         }
1625 #endif
1626         switch (type) {
1627         case IEEE80211_FC0_TYPE_DATA:
1628                 if (ni == vap->iv_bss)
1629                         goto out;
1630                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1631                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1632                             ni->ni_macaddr, NULL,
1633                             "peer link not yet established (%d)",
1634                             ni->ni_mlstate);
1635                         vap->iv_stats.is_mesh_nolink++;
1636                         goto out;
1637                 }
1638                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1639                     dir != IEEE80211_FC1_DIR_DSTODS) {
1640                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1641                             wh, "data", "incorrect dir 0x%x", dir);
1642                         vap->iv_stats.is_rx_wrongdir++;
1643                         goto err;
1644                 }
1645
1646                 /* All Mesh data frames are QoS subtype */
1647                 if (!HAS_SEQ(type)) {
1648                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1649                             wh, "data", "incorrect subtype 0x%x", subtype);
1650                         vap->iv_stats.is_rx_badsubtype++;
1651                         goto err;
1652                 }
1653
1654                 /*
1655                  * Next up, any fragmentation.
1656                  * XXX: we defrag before we even try to forward,
1657                  * Mesh Control field is not present in sub-sequent
1658                  * fragmented frames. This is in contrast to Draft 4.0.
1659                  */
1660                 hdrspace = ieee80211_hdrspace(ic, wh);
1661                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1662                         m = ieee80211_defrag(ni, m, hdrspace);
1663                         if (m == NULL) {
1664                                 /* Fragment dropped or frame not complete yet */
1665                                 goto out;
1666                         }
1667                 }
1668                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1669
1670                 /*
1671                  * Now we have a complete Mesh Data frame.
1672                  */
1673
1674                 /*
1675                  * Only fromDStoDS data frames use 4 address qos frames
1676                  * as specified in amendment. Otherwise addr4 is located
1677                  * in the Mesh Control field and a 3 address qos frame
1678                  * is used.
1679                  */
1680                 if (IEEE80211_IS_DSTODS(wh))
1681                         *(uint16_t *)qos = *(uint16_t *)
1682                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos;
1683                 else
1684                         *(uint16_t *)qos = *(uint16_t *)
1685                             ((struct ieee80211_qosframe *)wh)->i_qos;
1686
1687                 /*
1688                  * NB: The mesh STA sets the Mesh Control Present
1689                  * subfield to 1 in the Mesh Data frame containing
1690                  * an unfragmented MSDU, an A-MSDU, or the first
1691                  * fragment of an MSDU.
1692                  * After defrag it should always be present.
1693                  */
1694                 if (!(qos[1] & IEEE80211_QOS_MC)) {
1695                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1696                             ni->ni_macaddr, NULL,
1697                             "%s", "Mesh control field not present");
1698                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1699                         goto err;
1700                 }
1701
1702                 /* pull up enough to get to the mesh control */
1703                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1704                     (m = m_pullup(m, hdrspace +
1705                         sizeof(struct ieee80211_meshcntl))) == NULL) {
1706                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1707                             ni->ni_macaddr, NULL,
1708                             "data too short: expecting %u", hdrspace);
1709                         vap->iv_stats.is_rx_tooshort++;
1710                         goto out;               /* XXX */
1711                 }
1712                 /*
1713                  * Now calculate the full extent of the headers. Note
1714                  * mesh_decap will pull up anything we didn't get
1715                  * above when it strips the 802.11 headers.
1716                  */
1717                 mc = (const struct ieee80211_meshcntl *)
1718                     (mtod(m, const uint8_t *) + hdrspace);
1719                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1720                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1721                     ae * IEEE80211_ADDR_LEN;
1722                 hdrspace += meshdrlen;
1723
1724                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1725                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1726                     (m->m_len < hdrspace) &&
1727                     ((m = m_pullup(m, hdrspace)) == NULL)) {
1728                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1729                             ni->ni_macaddr, NULL,
1730                             "data too short: expecting %u", hdrspace);
1731                         vap->iv_stats.is_rx_tooshort++;
1732                         goto out;               /* XXX */
1733                 }
1734                 /* XXX: are we sure there is no reallocating after m_pullup? */
1735
1736                 seq = LE_READ_4(mc->mc_seq);
1737                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1738                         addr = wh->i_addr3;
1739                 else if (ae == IEEE80211_MESH_AE_01)
1740                         addr = MC01(mc)->mc_addr4;
1741                 else
1742                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1743                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1744                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1745                             addr, "data", "%s", "not to me");
1746                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1747                         goto out;
1748                 }
1749                 if (mesh_checkpseq(vap, addr, seq) != 0) {
1750                         vap->iv_stats.is_rx_dup++;
1751                         goto out;
1752                 }
1753
1754                 /* This code "routes" the frame to the right control path */
1755                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1756                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1757                                 error =
1758                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1759                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1760                                 error = mesh_recv_group_data(vap, m, wh, mc);
1761                         else
1762                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1763                                     wh, mc);
1764                 } else
1765                         error = mesh_recv_group_data(vap, m, wh, mc);
1766                 if (error < 0)
1767                         goto err;
1768                 else if (error > 0)
1769                         goto out;
1770
1771                 if (ieee80211_radiotap_active_vap(vap))
1772                         ieee80211_radiotap_rx(vap, m);
1773                 need_tap = 0;
1774
1775                 /*
1776                  * Finally, strip the 802.11 header.
1777                  */
1778                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1779                 if (m == NULL) {
1780                         /* XXX mask bit to check for both */
1781                         /* don't count Null data frames as errors */
1782                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1783                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1784                                 goto out;
1785                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1786                             ni->ni_macaddr, "data", "%s", "decap error");
1787                         vap->iv_stats.is_rx_decap++;
1788                         IEEE80211_NODE_STAT(ni, rx_decap);
1789                         goto err;
1790                 }
1791                 if (qos[0] & IEEE80211_QOS_AMSDU) {
1792                         m = ieee80211_decap_amsdu(ni, m);
1793                         if (m == NULL)
1794                                 return IEEE80211_FC0_TYPE_DATA;
1795                 }
1796                 ieee80211_deliver_data(vap, ni, m);
1797                 return type;
1798         case IEEE80211_FC0_TYPE_MGT:
1799                 vap->iv_stats.is_rx_mgmt++;
1800                 IEEE80211_NODE_STAT(ni, rx_mgmt);
1801                 if (dir != IEEE80211_FC1_DIR_NODS) {
1802                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1803                             wh, "mgt", "incorrect dir 0x%x", dir);
1804                         vap->iv_stats.is_rx_wrongdir++;
1805                         goto err;
1806                 }
1807                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1808                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1809                             ni->ni_macaddr, "mgt", "too short: len %u",
1810                             m->m_pkthdr.len);
1811                         vap->iv_stats.is_rx_tooshort++;
1812                         goto out;
1813                 }
1814 #ifdef IEEE80211_DEBUG
1815                 if ((ieee80211_msg_debug(vap) &&
1816                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1817                     ieee80211_msg_dumppkts(vap)) {
1818                         if_printf(ifp, "received %s from %s rssi %d\n",
1819                             ieee80211_mgt_subtype_name[subtype >>
1820                             IEEE80211_FC0_SUBTYPE_SHIFT],
1821                             ether_sprintf(wh->i_addr2), rssi);
1822                 }
1823 #endif
1824                 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1825                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1826                             wh, NULL, "%s", "WEP set but not permitted");
1827                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1828                         goto out;
1829                 }
1830                 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
1831                 goto out;
1832         case IEEE80211_FC0_TYPE_CTL:
1833                 vap->iv_stats.is_rx_ctl++;
1834                 IEEE80211_NODE_STAT(ni, rx_ctrl);
1835                 goto out;
1836         default:
1837                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1838                     wh, "bad", "frame type 0x%x", type);
1839                 /* should not come here */
1840                 break;
1841         }
1842 err:
1843         if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
1844 out:
1845         if (m != NULL) {
1846                 if (need_tap && ieee80211_radiotap_active_vap(vap))
1847                         ieee80211_radiotap_rx(vap, m);
1848                 m_freem(m);
1849         }
1850         return type;
1851 #undef  HAS_SEQ
1852 #undef  MC01
1853 #undef  MC10
1854 }
1855
1856 static void
1857 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1858     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1859 {
1860         struct ieee80211vap *vap = ni->ni_vap;
1861         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1862         struct ieee80211com *ic = ni->ni_ic;
1863         struct ieee80211_channel *rxchan = ic->ic_curchan;
1864         struct ieee80211_frame *wh;
1865         struct ieee80211_mesh_route *rt;
1866         uint8_t *frm, *efrm;
1867
1868         wh = mtod(m0, struct ieee80211_frame *);
1869         frm = (uint8_t *)&wh[1];
1870         efrm = mtod(m0, uint8_t *) + m0->m_len;
1871         switch (subtype) {
1872         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1873         case IEEE80211_FC0_SUBTYPE_BEACON:
1874         {
1875                 struct ieee80211_scanparams scan;
1876                 struct ieee80211_channel *c;
1877                 /*
1878                  * We process beacon/probe response
1879                  * frames to discover neighbors.
1880                  */
1881                 if (rxs != NULL) {
1882                         c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1883                         if (c != NULL)
1884                                 rxchan = c;
1885                 }
1886                 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
1887                         return;
1888                 /*
1889                  * Count frame now that we know it's to be processed.
1890                  */
1891                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1892                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
1893                         IEEE80211_NODE_STAT(ni, rx_beacons);
1894                 } else
1895                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1896                 /*
1897                  * If scanning, just pass information to the scan module.
1898                  */
1899                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1900                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1901                                 /*
1902                                  * Actively scanning a channel marked passive;
1903                                  * send a probe request now that we know there
1904                                  * is 802.11 traffic present.
1905                                  *
1906                                  * XXX check if the beacon we recv'd gives
1907                                  * us what we need and suppress the probe req
1908                                  */
1909                                 ieee80211_probe_curchan(vap, 1);
1910                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1911                         }
1912                         ieee80211_add_scan(vap, rxchan, &scan, wh,
1913                             subtype, rssi, nf);
1914                         return;
1915                 }
1916
1917                 /* The rest of this code assumes we are running */
1918                 if (vap->iv_state != IEEE80211_S_RUN)
1919                         return;
1920                 /*
1921                  * Ignore non-mesh STAs.
1922                  */
1923                 if ((scan.capinfo &
1924                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1925                     scan.meshid == NULL || scan.meshconf == NULL) {
1926                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1927                             wh, "beacon", "%s", "not a mesh sta");
1928                         vap->iv_stats.is_mesh_wrongmesh++;
1929                         return;
1930                 }
1931                 /*
1932                  * Ignore STAs for other mesh networks.
1933                  */
1934                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1935                     mesh_verify_meshconf(vap, scan.meshconf)) {
1936                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1937                             wh, "beacon", "%s", "not for our mesh");
1938                         vap->iv_stats.is_mesh_wrongmesh++;
1939                         return;
1940                 }
1941                 /*
1942                  * Peer only based on the current ACL policy.
1943                  */
1944                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1945                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1946                             wh, NULL, "%s", "disallowed by ACL");
1947                         vap->iv_stats.is_rx_acl++;
1948                         return;
1949                 }
1950                 /*
1951                  * Do neighbor discovery.
1952                  */
1953                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1954                         /*
1955                          * Create a new entry in the neighbor table.
1956                          */
1957                         ni = ieee80211_add_neighbor(vap, wh, &scan);
1958                 }
1959                 /*
1960                  * Automatically peer with discovered nodes if possible.
1961                  */
1962                 if (ni != vap->iv_bss &&
1963                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1964                         switch (ni->ni_mlstate) {
1965                         case IEEE80211_NODE_MESH_IDLE:
1966                         {
1967                                 uint16_t args[1];
1968
1969                                 /* Wait for backoff callout to reset counter */
1970                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1971                                         return;
1972
1973                                 ni->ni_mlpid = mesh_generateid(vap);
1974                                 if (ni->ni_mlpid == 0)
1975                                         return;
1976                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1977                                 args[0] = ni->ni_mlpid;
1978                                 ieee80211_send_action(ni,
1979                                 IEEE80211_ACTION_CAT_SELF_PROT,
1980                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1981                                 ni->ni_mlrcnt = 0;
1982                                 mesh_peer_timeout_setup(ni);
1983                                 break;
1984                         }
1985                         case IEEE80211_NODE_MESH_ESTABLISHED:
1986                         {
1987                                 /*
1988                                  * Valid beacon from a peer mesh STA
1989                                  * bump TA lifetime
1990                                  */
1991                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1992                                 if(rt != NULL) {
1993                                         ieee80211_mesh_rt_update(rt,
1994                                             ticks_to_msecs(
1995                                             ms->ms_ppath->mpp_inact));
1996                                 }
1997                                 break;
1998                         }
1999                         default:
2000                                 break; /* ignore */
2001                         }
2002                 }
2003                 break;
2004         }
2005         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
2006         {
2007                 uint8_t *ssid, *meshid, *rates, *xrates;
2008                 uint8_t *sfrm;
2009
2010                 if (vap->iv_state != IEEE80211_S_RUN) {
2011                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2012                             wh, NULL, "wrong state %s",
2013                             ieee80211_state_name[vap->iv_state]);
2014                         vap->iv_stats.is_rx_mgtdiscard++;
2015                         return;
2016                 }
2017                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
2018                         /* frame must be directed */
2019                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2020                             wh, NULL, "%s", "not unicast");
2021                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
2022                         return;
2023                 }
2024                 /*
2025                  * prreq frame format
2026                  *      [tlv] ssid
2027                  *      [tlv] supported rates
2028                  *      [tlv] extended supported rates
2029                  *      [tlv] mesh id
2030                  */
2031                 ssid = meshid = rates = xrates = NULL;
2032                 sfrm = frm;
2033                 while (efrm - frm > 1) {
2034                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2035                         switch (*frm) {
2036                         case IEEE80211_ELEMID_SSID:
2037                                 ssid = frm;
2038                                 break;
2039                         case IEEE80211_ELEMID_RATES:
2040                                 rates = frm;
2041                                 break;
2042                         case IEEE80211_ELEMID_XRATES:
2043                                 xrates = frm;
2044                                 break;
2045                         case IEEE80211_ELEMID_MESHID:
2046                                 meshid = frm;
2047                                 break;
2048                         }
2049                         frm += frm[1] + 2;
2050                 }
2051                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2052                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2053                 if (xrates != NULL)
2054                         IEEE80211_VERIFY_ELEMENT(xrates,
2055                             IEEE80211_RATE_MAXSIZE - rates[1], return);
2056                 if (meshid != NULL) {
2057                         IEEE80211_VERIFY_ELEMENT(meshid,
2058                             IEEE80211_MESHID_LEN, return);
2059                         /* NB: meshid, not ssid */
2060                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2061                 }
2062
2063                 /* XXX find a better class or define it's own */
2064                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2065                     "%s", "recv probe req");
2066                 /*
2067                  * Some legacy 11b clients cannot hack a complete
2068                  * probe response frame.  When the request includes
2069                  * only a bare-bones rate set, communicate this to
2070                  * the transmit side.
2071                  */
2072                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2073                 break;
2074         }
2075
2076         case IEEE80211_FC0_SUBTYPE_ACTION:
2077         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2078                 if (ni == vap->iv_bss) {
2079                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2080                             wh, NULL, "%s", "unknown node");
2081                         vap->iv_stats.is_rx_mgtdiscard++;
2082                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2083                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2084                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2085                             wh, NULL, "%s", "not for us");
2086                         vap->iv_stats.is_rx_mgtdiscard++;
2087                 } else if (vap->iv_state != IEEE80211_S_RUN) {
2088                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2089                             wh, NULL, "wrong state %s",
2090                             ieee80211_state_name[vap->iv_state]);
2091                         vap->iv_stats.is_rx_mgtdiscard++;
2092                 } else {
2093                         if (ieee80211_parse_action(ni, m0) == 0)
2094                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2095                 }
2096                 break;
2097
2098         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2099         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2100         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2101         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2102         case IEEE80211_FC0_SUBTYPE_ATIM:
2103         case IEEE80211_FC0_SUBTYPE_DISASSOC:
2104         case IEEE80211_FC0_SUBTYPE_AUTH:
2105         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2106                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2107                     wh, NULL, "%s", "not handled");
2108                 vap->iv_stats.is_rx_mgtdiscard++;
2109                 break;
2110
2111         default:
2112                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2113                     wh, "mgt", "subtype 0x%x not handled", subtype);
2114                 vap->iv_stats.is_rx_badsubtype++;
2115                 break;
2116         }
2117 }
2118
2119 static void
2120 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2121 {
2122
2123         switch (subtype) {
2124         case IEEE80211_FC0_SUBTYPE_BAR:
2125                 ieee80211_recv_bar(ni, m);
2126                 break;
2127         }
2128 }
2129
2130 /*
2131  * Parse meshpeering action ie's for MPM frames
2132  */
2133 static const struct ieee80211_meshpeer_ie *
2134 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2135         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
2136         const uint8_t *frm, const uint8_t *efrm,
2137         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2138 {
2139         struct ieee80211vap *vap = ni->ni_vap;
2140         const struct ieee80211_meshpeer_ie *mpie;
2141         uint16_t args[3];
2142         const uint8_t *meshid, *meshconf, *meshpeer;
2143         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2144
2145         meshid = meshconf = meshpeer = NULL;
2146         while (efrm - frm > 1) {
2147                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2148                 switch (*frm) {
2149                 case IEEE80211_ELEMID_MESHID:
2150                         meshid = frm;
2151                         break;
2152                 case IEEE80211_ELEMID_MESHCONF:
2153                         meshconf = frm;
2154                         break;
2155                 case IEEE80211_ELEMID_MESHPEER:
2156                         meshpeer = frm;
2157                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
2158                         memset(mp, 0, sizeof(*mp));
2159                         mp->peer_len = mpie->peer_len;
2160                         mp->peer_proto = LE_READ_2(&mpie->peer_proto);
2161                         mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid);
2162                         switch (subtype) {
2163                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2164                                 mp->peer_linkid =
2165                                     LE_READ_2(&mpie->peer_linkid);
2166                                 break;
2167                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
2168                                 /* NB: peer link ID is optional */
2169                                 if (mpie->peer_len ==
2170                                     (IEEE80211_MPM_BASE_SZ + 2)) {
2171                                         mp->peer_linkid = 0;
2172                                         mp->peer_rcode =
2173                                             LE_READ_2(&mpie->peer_linkid);
2174                                 } else {
2175                                         mp->peer_linkid =
2176                                             LE_READ_2(&mpie->peer_linkid);
2177                                         mp->peer_rcode =
2178                                             LE_READ_2(&mpie->peer_rcode);
2179                                 }
2180                                 break;
2181                         }
2182                         break;
2183                 }
2184                 frm += frm[1] + 2;
2185         }
2186
2187         /*
2188          * Verify the contents of the frame.
2189          * If it fails validation, close the peer link.
2190          */
2191         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2192                 sendclose = 1;
2193                 IEEE80211_DISCARD(vap,
2194                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2195                     wh, NULL, "%s", "MPM validation failed");
2196         }
2197
2198         /* If meshid is not the same reject any frames type. */
2199         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2200                 sendclose = 1;
2201                 IEEE80211_DISCARD(vap,
2202                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2203                     wh, NULL, "%s", "not for our mesh");
2204                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2205                         /*
2206                          * Standard not clear about this, if we dont ignore
2207                          * there will be an endless loop between nodes sending
2208                          * CLOSE frames between each other with wrong meshid.
2209                          * Discard and timers will bring FSM to IDLE state.
2210                          */
2211                         return NULL;
2212                 }
2213         }
2214
2215         /*
2216          * Close frames are accepted if meshid is the same.
2217          * Verify the other two types.
2218          */
2219         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2220             mesh_verify_meshconf(vap, meshconf)) {
2221                 sendclose = 1;
2222                 IEEE80211_DISCARD(vap,
2223                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2224                     wh, NULL, "%s", "configuration missmatch");
2225         }
2226
2227         if (sendclose) {
2228                 vap->iv_stats.is_rx_mgtdiscard++;
2229                 switch (ni->ni_mlstate) {
2230                 case IEEE80211_NODE_MESH_IDLE:
2231                 case IEEE80211_NODE_MESH_ESTABLISHED:
2232                 case IEEE80211_NODE_MESH_HOLDING:
2233                         /* ignore */
2234                         break;
2235                 case IEEE80211_NODE_MESH_OPENSNT:
2236                 case IEEE80211_NODE_MESH_OPENRCV:
2237                 case IEEE80211_NODE_MESH_CONFIRMRCV:
2238                         args[0] = ni->ni_mlpid;
2239                         args[1] = ni->ni_mllid;
2240                         /* Reason codes for rejection */
2241                         switch (subtype) {
2242                         case IEEE80211_ACTION_MESHPEERING_OPEN:
2243                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2244                                 break;
2245                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2246                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2247                                 break;
2248                         }
2249                         ieee80211_send_action(ni,
2250                             IEEE80211_ACTION_CAT_SELF_PROT,
2251                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2252                             args);
2253                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2254                         mesh_peer_timeout_setup(ni);
2255                         break;
2256                 }
2257                 return NULL;
2258         }
2259
2260         return (const struct ieee80211_meshpeer_ie *) mp;
2261 }
2262
2263 static int
2264 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2265         const struct ieee80211_frame *wh,
2266         const uint8_t *frm, const uint8_t *efrm)
2267 {
2268         struct ieee80211vap *vap = ni->ni_vap;
2269         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2270         struct ieee80211_meshpeer_ie ie;
2271         const struct ieee80211_meshpeer_ie *meshpeer;
2272         uint16_t args[3];
2273
2274         /* +2+2 for action + code + capabilites */
2275         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2276             IEEE80211_ACTION_MESHPEERING_OPEN);
2277         if (meshpeer == NULL) {
2278                 return 0;
2279         }
2280
2281         /* XXX move up */
2282         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2283             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2284
2285         switch (ni->ni_mlstate) {
2286         case IEEE80211_NODE_MESH_IDLE:
2287                 /* Reject open request if reached our maximum neighbor count */
2288                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2289                         args[0] = meshpeer->peer_llinkid;
2290                         args[1] = 0;
2291                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2292                         ieee80211_send_action(ni,
2293                             IEEE80211_ACTION_CAT_SELF_PROT,
2294                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2295                             args);
2296                         /* stay in IDLE state */
2297                         return (0);
2298                 }
2299                 /* Open frame accepted */
2300                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2301                 ni->ni_mllid = meshpeer->peer_llinkid;
2302                 ni->ni_mlpid = mesh_generateid(vap);
2303                 if (ni->ni_mlpid == 0)
2304                         return 0;               /* XXX */
2305                 args[0] = ni->ni_mlpid;
2306                 /* Announce we're open too... */
2307                 ieee80211_send_action(ni,
2308                     IEEE80211_ACTION_CAT_SELF_PROT,
2309                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
2310                 /* ...and confirm the link. */
2311                 args[0] = ni->ni_mlpid;
2312                 args[1] = ni->ni_mllid;
2313                 ieee80211_send_action(ni,
2314                     IEEE80211_ACTION_CAT_SELF_PROT,
2315                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2316                     args);
2317                 mesh_peer_timeout_setup(ni);
2318                 break;
2319         case IEEE80211_NODE_MESH_OPENRCV:
2320                 /* Wrong Link ID */
2321                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2322                         args[0] = ni->ni_mllid;
2323                         args[1] = ni->ni_mlpid;
2324                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2325                         ieee80211_send_action(ni,
2326                             IEEE80211_ACTION_CAT_SELF_PROT,
2327                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2328                             args);
2329                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2330                         mesh_peer_timeout_setup(ni);
2331                         break;
2332                 }
2333                 /* Duplicate open, confirm again. */
2334                 args[0] = ni->ni_mlpid;
2335                 args[1] = ni->ni_mllid;
2336                 ieee80211_send_action(ni,
2337                     IEEE80211_ACTION_CAT_SELF_PROT,
2338                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2339                     args);
2340                 break;
2341         case IEEE80211_NODE_MESH_OPENSNT:
2342                 ni->ni_mllid = meshpeer->peer_llinkid;
2343                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
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                 /* NB: don't setup/clear any timeout */
2351                 break;
2352         case IEEE80211_NODE_MESH_CONFIRMRCV:
2353                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2354                     ni->ni_mllid != meshpeer->peer_llinkid) {
2355                         args[0] = ni->ni_mlpid;
2356                         args[1] = ni->ni_mllid;
2357                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2358                         ieee80211_send_action(ni,
2359                             IEEE80211_ACTION_CAT_SELF_PROT,
2360                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2361                             args);
2362                         mesh_linkchange(ni,
2363                             IEEE80211_NODE_MESH_HOLDING);
2364                         mesh_peer_timeout_setup(ni);
2365                         break;
2366                 }
2367                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2368                 ni->ni_mllid = meshpeer->peer_llinkid;
2369                 args[0] = ni->ni_mlpid;
2370                 args[1] = ni->ni_mllid;
2371                 ieee80211_send_action(ni,
2372                     IEEE80211_ACTION_CAT_SELF_PROT,
2373                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2374                     args);
2375                 mesh_peer_timeout_stop(ni);
2376                 break;
2377         case IEEE80211_NODE_MESH_ESTABLISHED:
2378                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2379                         args[0] = ni->ni_mllid;
2380                         args[1] = ni->ni_mlpid;
2381                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2382                         ieee80211_send_action(ni,
2383                             IEEE80211_ACTION_CAT_SELF_PROT,
2384                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2385                             args);
2386                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2387                         mesh_peer_timeout_setup(ni);
2388                         break;
2389                 }
2390                 args[0] = ni->ni_mlpid;
2391                 args[1] = ni->ni_mllid;
2392                 ieee80211_send_action(ni,
2393                     IEEE80211_ACTION_CAT_SELF_PROT,
2394                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2395                     args);
2396                 break;
2397         case IEEE80211_NODE_MESH_HOLDING:
2398                 args[0] = ni->ni_mlpid;
2399                 args[1] = meshpeer->peer_llinkid;
2400                 /* Standard not clear about what the reaason code should be */
2401                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2402                 ieee80211_send_action(ni,
2403                     IEEE80211_ACTION_CAT_SELF_PROT,
2404                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2405                     args);
2406                 break;
2407         }
2408         return 0;
2409 }
2410
2411 static int
2412 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2413         const struct ieee80211_frame *wh,
2414         const uint8_t *frm, const uint8_t *efrm)
2415 {
2416         struct ieee80211vap *vap = ni->ni_vap;
2417         struct ieee80211_meshpeer_ie ie;
2418         const struct ieee80211_meshpeer_ie *meshpeer;
2419         uint16_t args[3];
2420
2421         /* +2+2+2+2 for action + code + capabilites + status code + AID */
2422         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2423             IEEE80211_ACTION_MESHPEERING_CONFIRM);
2424         if (meshpeer == NULL) {
2425                 return 0;
2426         }
2427
2428         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2429             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2430             meshpeer->peer_llinkid, meshpeer->peer_linkid);
2431
2432         switch (ni->ni_mlstate) {
2433         case IEEE80211_NODE_MESH_OPENRCV:
2434                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2435                 mesh_peer_timeout_stop(ni);
2436                 break;
2437         case IEEE80211_NODE_MESH_OPENSNT:
2438                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2439                 mesh_peer_timeout_setup(ni);
2440                 break;
2441         case IEEE80211_NODE_MESH_HOLDING:
2442                 args[0] = ni->ni_mlpid;
2443                 args[1] = meshpeer->peer_llinkid;
2444                 /* Standard not clear about what the reaason code should be */
2445                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2446                 ieee80211_send_action(ni,
2447                     IEEE80211_ACTION_CAT_SELF_PROT,
2448                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2449                     args);
2450                 break;
2451         case IEEE80211_NODE_MESH_CONFIRMRCV:
2452                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2453                         args[0] = ni->ni_mlpid;
2454                         args[1] = ni->ni_mllid;
2455                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2456                         ieee80211_send_action(ni,
2457                             IEEE80211_ACTION_CAT_SELF_PROT,
2458                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2459                             args);
2460                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2461                         mesh_peer_timeout_setup(ni);
2462                 }
2463                 break;
2464         default:
2465                 IEEE80211_DISCARD(vap,
2466                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2467                     wh, NULL, "received confirm in invalid state %d",
2468                     ni->ni_mlstate);
2469                 vap->iv_stats.is_rx_mgtdiscard++;
2470                 break;
2471         }
2472         return 0;
2473 }
2474
2475 static int
2476 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2477         const struct ieee80211_frame *wh,
2478         const uint8_t *frm, const uint8_t *efrm)
2479 {
2480         struct ieee80211_meshpeer_ie ie;
2481         const struct ieee80211_meshpeer_ie *meshpeer;
2482         uint16_t args[3];
2483
2484         /* +2 for action + code */
2485         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2486             IEEE80211_ACTION_MESHPEERING_CLOSE);
2487         if (meshpeer == NULL) {
2488                 return 0;
2489         }
2490
2491         /*
2492          * XXX: check reason code, for example we could receive
2493          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2494          * to peer again.
2495          */
2496
2497         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2498             ni, "%s", "recv PEER CLOSE");
2499
2500         switch (ni->ni_mlstate) {
2501         case IEEE80211_NODE_MESH_IDLE:
2502                 /* ignore */
2503                 break;
2504         case IEEE80211_NODE_MESH_OPENRCV:
2505         case IEEE80211_NODE_MESH_OPENSNT:
2506         case IEEE80211_NODE_MESH_CONFIRMRCV:
2507         case IEEE80211_NODE_MESH_ESTABLISHED:
2508                 args[0] = ni->ni_mlpid;
2509                 args[1] = ni->ni_mllid;
2510                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2511                 ieee80211_send_action(ni,
2512                     IEEE80211_ACTION_CAT_SELF_PROT,
2513                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2514                     args);
2515                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2516                 mesh_peer_timeout_setup(ni);
2517                 break;
2518         case IEEE80211_NODE_MESH_HOLDING:
2519                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2520                 mesh_peer_timeout_stop(ni);
2521                 break;
2522         }
2523         return 0;
2524 }
2525
2526 /*
2527  * Link Metric handling.
2528  */
2529 static int
2530 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2531         const struct ieee80211_frame *wh,
2532         const uint8_t *frm, const uint8_t *efrm)
2533 {
2534         const struct ieee80211_meshlmetric_ie *ie =
2535             (const struct ieee80211_meshlmetric_ie *)
2536             (frm+2); /* action + code */
2537         struct ieee80211_meshlmetric_ie lm_rep;
2538
2539         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2540                 lm_rep.lm_flags = 0;
2541                 lm_rep.lm_metric = mesh_airtime_calc(ni);
2542                 ieee80211_send_action(ni,
2543                     IEEE80211_ACTION_CAT_MESH,
2544                     IEEE80211_ACTION_MESH_LMETRIC,
2545                     &lm_rep);
2546         }
2547         /* XXX: else do nothing for now */
2548         return 0;
2549 }
2550
2551 /*
2552  * Parse meshgate action ie's for GANN frames.
2553  * Returns -1 if parsing fails, otherwise 0.
2554  */
2555 static int
2556 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2557     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
2558     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2559 {
2560         struct ieee80211vap *vap = ni->ni_vap;
2561         const struct ieee80211_meshgann_ie *gannie;
2562
2563         while (efrm - frm > 1) {
2564                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2565                 switch (*frm) {
2566                 case IEEE80211_ELEMID_MESHGANN:
2567                         gannie = (const struct ieee80211_meshgann_ie *) frm;
2568                         memset(ie, 0, sizeof(*ie));
2569                         ie->gann_ie = gannie->gann_ie;
2570                         ie->gann_len = gannie->gann_len;
2571                         ie->gann_flags = gannie->gann_flags;
2572                         ie->gann_hopcount = gannie->gann_hopcount;
2573                         ie->gann_ttl = gannie->gann_ttl;
2574                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2575                         ie->gann_seq = LE_READ_4(&gannie->gann_seq);
2576                         ie->gann_interval = LE_READ_2(&gannie->gann_interval);
2577                         break;
2578                 }
2579                 frm += frm[1] + 2;
2580         }
2581
2582         return 0;
2583 }
2584
2585 /*
2586  * Mesh Gate Announcement handling.
2587  */
2588 static int
2589 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2590         const struct ieee80211_frame *wh,
2591         const uint8_t *frm, const uint8_t *efrm)
2592 {
2593         struct ieee80211vap *vap = ni->ni_vap;
2594         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2595         struct ieee80211_mesh_gate_route *gr, *next;
2596         struct ieee80211_mesh_route *rt_gate;
2597         struct ieee80211_meshgann_ie pgann;
2598         struct ieee80211_meshgann_ie ie;
2599         int found = 0;
2600
2601         /* +2 for action + code */
2602         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2603                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2604                     ni->ni_macaddr, NULL, "%s",
2605                     "GANN parsing failed");
2606                 vap->iv_stats.is_rx_mgtdiscard++;
2607                 return (0);
2608         }
2609
2610         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2611                 return 0;
2612
2613         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2614             "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2615             ie.gann_seq);
2616
2617         if (ms == NULL)
2618                 return (0);
2619         MESH_RT_LOCK(ms);
2620         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2621                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2622                         continue;
2623                 if (ie.gann_seq <= gr->gr_lastseq) {
2624                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2625                             ni->ni_macaddr, NULL,
2626                             "GANN old seqno %u <= %u",
2627                             ie.gann_seq, gr->gr_lastseq);
2628                         MESH_RT_UNLOCK(ms);
2629                         return (0);
2630                 }
2631                 /* corresponding mesh gate found & GANN accepted */
2632                 found = 1;
2633                 break;
2634
2635         }
2636         if (found == 0) {
2637                 /* this GANN is from a new mesh Gate add it to known table. */
2638                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2639                     "stored new GANN information, seq %u.", ie.gann_seq);
2640                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2641                     M_80211_MESH_GT_RT,
2642                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2643                 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2644                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2645         }
2646         gr->gr_lastseq = ie.gann_seq;
2647
2648         /* check if we have a path to this gate */
2649         rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2650         if (rt_gate != NULL &&
2651             rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2652                 gr->gr_route = rt_gate;
2653                 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2654         }
2655
2656         MESH_RT_UNLOCK(ms);
2657
2658         /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2659         if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2660                 return 0;
2661                 pgann.gann_flags = ie.gann_flags; /* Reserved */
2662         pgann.gann_hopcount = ie.gann_hopcount + 1;
2663         pgann.gann_ttl = ie.gann_ttl - 1;
2664         IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2665         pgann.gann_seq = ie.gann_seq;
2666         pgann.gann_interval = ie.gann_interval;
2667
2668         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2669             "%s", "propagate GANN");
2670
2671         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2672             IEEE80211_ACTION_MESH_GANN, &pgann);
2673
2674         return 0;
2675 }
2676
2677 static int
2678 mesh_send_action(struct ieee80211_node *ni,
2679     const uint8_t sa[IEEE80211_ADDR_LEN],
2680     const uint8_t da[IEEE80211_ADDR_LEN],
2681     struct mbuf *m)
2682 {
2683         struct ieee80211vap *vap = ni->ni_vap;
2684         struct ieee80211com *ic = ni->ni_ic;
2685         struct ieee80211_bpf_params params;
2686         struct ieee80211_frame *wh;
2687         int ret;
2688
2689         KASSERT(ni != NULL, ("null node"));
2690
2691         if (vap->iv_state == IEEE80211_S_CAC) {
2692                 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2693                     "block %s frame in CAC state", "Mesh action");
2694                 vap->iv_stats.is_tx_badstate++;
2695                 ieee80211_free_node(ni);
2696                 m_freem(m);
2697                 return EIO;             /* XXX */
2698         }
2699
2700         M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2701         if (m == NULL) {
2702                 ieee80211_free_node(ni);
2703                 return ENOMEM;
2704         }
2705
2706         IEEE80211_TX_LOCK(ic);
2707         wh = mtod(m, struct ieee80211_frame *);
2708         ieee80211_send_setup(ni, m,
2709              IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2710              IEEE80211_NONQOS_TID, sa, da, sa);
2711         m->m_flags |= M_ENCAP;          /* mark encapsulated */
2712
2713         memset(&params, 0, sizeof(params));
2714         params.ibp_pri = WME_AC_VO;
2715         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2716         if (IEEE80211_IS_MULTICAST(da))
2717                 params.ibp_try0 = 1;
2718         else
2719                 params.ibp_try0 = ni->ni_txparms->maxretry;
2720         params.ibp_power = ni->ni_txpower;
2721
2722         IEEE80211_NODE_STAT(ni, tx_mgmt);
2723
2724         ret = ieee80211_raw_output(vap, ni, m, &params);
2725         IEEE80211_TX_UNLOCK(ic);
2726         return (ret);
2727 }
2728
2729 #define ADDSHORT(frm, v) do {                   \
2730         frm[0] = (v) & 0xff;                    \
2731         frm[1] = (v) >> 8;                      \
2732         frm += 2;                               \
2733 } while (0)
2734 #define ADDWORD(frm, v) do {                    \
2735         frm[0] = (v) & 0xff;                    \
2736         frm[1] = ((v) >> 8) & 0xff;             \
2737         frm[2] = ((v) >> 16) & 0xff;            \
2738         frm[3] = ((v) >> 24) & 0xff;            \
2739         frm += 4;                               \
2740 } while (0)
2741
2742 static int
2743 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2744         int category, int action, void *args0)
2745 {
2746         struct ieee80211vap *vap = ni->ni_vap;
2747         struct ieee80211com *ic = ni->ni_ic;
2748         uint16_t *args = args0;
2749         const struct ieee80211_rateset *rs;
2750         struct mbuf *m;
2751         uint8_t *frm;
2752
2753         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2754             "send PEER OPEN action: localid 0x%x", args[0]);
2755
2756         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2757             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2758             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2759         ieee80211_ref_node(ni);
2760
2761         m = ieee80211_getmgtframe(&frm,
2762             ic->ic_headroom + sizeof(struct ieee80211_frame),
2763             sizeof(uint16_t)    /* action+category */
2764             + sizeof(uint16_t)  /* capabilites */
2765             + 2 + IEEE80211_RATE_SIZE
2766             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2767             + 2 + IEEE80211_MESHID_LEN
2768             + sizeof(struct ieee80211_meshconf_ie)
2769             + sizeof(struct ieee80211_meshpeer_ie)
2770         );
2771         if (m != NULL) {
2772                 /*
2773                  * mesh peer open action frame format:
2774                  *   [1] category
2775                  *   [1] action
2776                  *   [2] capabilities
2777                  *   [tlv] rates
2778                  *   [tlv] xrates
2779                  *   [tlv] mesh id
2780                  *   [tlv] mesh conf
2781                  *   [tlv] mesh peer link mgmt
2782                  */
2783                 *frm++ = category;
2784                 *frm++ = action;
2785                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2786                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2787                 frm = ieee80211_add_rates(frm, rs);
2788                 frm = ieee80211_add_xrates(frm, rs);
2789                 frm = ieee80211_add_meshid(frm, vap);
2790                 frm = ieee80211_add_meshconf(frm, vap);
2791                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2792                     args[0], 0, 0);
2793                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2794                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2795         } else {
2796                 vap->iv_stats.is_tx_nobuf++;
2797                 ieee80211_free_node(ni);
2798                 return ENOMEM;
2799         }
2800 }
2801
2802 static int
2803 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2804         int category, int action, void *args0)
2805 {
2806         struct ieee80211vap *vap = ni->ni_vap;
2807         struct ieee80211com *ic = ni->ni_ic;
2808         uint16_t *args = args0;
2809         const struct ieee80211_rateset *rs;
2810         struct mbuf *m;
2811         uint8_t *frm;
2812
2813         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2814             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2815             args[0], args[1]);
2816
2817         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2818             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2819             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2820         ieee80211_ref_node(ni);
2821
2822         m = ieee80211_getmgtframe(&frm,
2823             ic->ic_headroom + sizeof(struct ieee80211_frame),
2824             sizeof(uint16_t)    /* action+category */
2825             + sizeof(uint16_t)  /* capabilites */
2826             + sizeof(uint16_t)  /* status code */
2827             + sizeof(uint16_t)  /* AID */
2828             + 2 + IEEE80211_RATE_SIZE
2829             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2830             + 2 + IEEE80211_MESHID_LEN
2831             + sizeof(struct ieee80211_meshconf_ie)
2832             + sizeof(struct ieee80211_meshpeer_ie)
2833         );
2834         if (m != NULL) {
2835                 /*
2836                  * mesh peer confirm action frame format:
2837                  *   [1] category
2838                  *   [1] action
2839                  *   [2] capabilities
2840                  *   [2] status code
2841                  *   [2] association id (peer ID)
2842                  *   [tlv] rates
2843                  *   [tlv] xrates
2844                  *   [tlv] mesh id
2845                  *   [tlv] mesh conf
2846                  *   [tlv] mesh peer link mgmt
2847                  */
2848                 *frm++ = category;
2849                 *frm++ = action;
2850                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2851                 ADDSHORT(frm, 0);               /* status code */
2852                 ADDSHORT(frm, args[1]);         /* AID */
2853                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2854                 frm = ieee80211_add_rates(frm, rs);
2855                 frm = ieee80211_add_xrates(frm, rs);
2856                 frm = ieee80211_add_meshid(frm, vap);
2857                 frm = ieee80211_add_meshconf(frm, vap);
2858                 frm = ieee80211_add_meshpeer(frm,
2859                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2860                     args[0], args[1], 0);
2861                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2862                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2863         } else {
2864                 vap->iv_stats.is_tx_nobuf++;
2865                 ieee80211_free_node(ni);
2866                 return ENOMEM;
2867         }
2868 }
2869
2870 static int
2871 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2872         int category, int action, void *args0)
2873 {
2874         struct ieee80211vap *vap = ni->ni_vap;
2875         struct ieee80211com *ic = ni->ni_ic;
2876         uint16_t *args = args0;
2877         struct mbuf *m;
2878         uint8_t *frm;
2879
2880         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2881             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d",
2882             args[0], args[1], args[2]);
2883
2884         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2885             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2886             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2887         ieee80211_ref_node(ni);
2888
2889         m = ieee80211_getmgtframe(&frm,
2890             ic->ic_headroom + sizeof(struct ieee80211_frame),
2891             sizeof(uint16_t)    /* action+category */
2892             + sizeof(uint16_t)  /* reason code */
2893             + 2 + IEEE80211_MESHID_LEN
2894             + sizeof(struct ieee80211_meshpeer_ie)
2895         );
2896         if (m != NULL) {
2897                 /*
2898                  * mesh peer close action frame format:
2899                  *   [1] category
2900                  *   [1] action
2901                  *   [tlv] mesh id
2902                  *   [tlv] mesh peer link mgmt
2903                  */
2904                 *frm++ = category;
2905                 *frm++ = action;
2906                 frm = ieee80211_add_meshid(frm, vap);
2907                 frm = ieee80211_add_meshpeer(frm,
2908                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2909                     args[0], args[1], args[2]);
2910                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2911                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2912         } else {
2913                 vap->iv_stats.is_tx_nobuf++;
2914                 ieee80211_free_node(ni);
2915                 return ENOMEM;
2916         }
2917 }
2918
2919 static int
2920 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2921         int category, int action, void *arg0)
2922 {
2923         struct ieee80211vap *vap = ni->ni_vap;
2924         struct ieee80211com *ic = ni->ni_ic;
2925         struct ieee80211_meshlmetric_ie *ie = arg0;
2926         struct mbuf *m;
2927         uint8_t *frm;
2928
2929         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2930                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2931                     ni, "%s", "send LINK METRIC REQUEST action");
2932         } else {
2933                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2934                     ni, "send LINK METRIC REPLY action: metric 0x%x",
2935                     ie->lm_metric);
2936         }
2937         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2938             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2939             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2940         ieee80211_ref_node(ni);
2941
2942         m = ieee80211_getmgtframe(&frm,
2943             ic->ic_headroom + sizeof(struct ieee80211_frame),
2944             sizeof(uint16_t) +  /* action+category */
2945             sizeof(struct ieee80211_meshlmetric_ie)
2946         );
2947         if (m != NULL) {
2948                 /*
2949                  * mesh link metric
2950                  *   [1] category
2951                  *   [1] action
2952                  *   [tlv] mesh link metric
2953                  */
2954                 *frm++ = category;
2955                 *frm++ = action;
2956                 frm = ieee80211_add_meshlmetric(frm,
2957                     ie->lm_flags, ie->lm_metric);
2958                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2959                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2960         } else {
2961                 vap->iv_stats.is_tx_nobuf++;
2962                 ieee80211_free_node(ni);
2963                 return ENOMEM;
2964         }
2965 }
2966
2967 static int
2968 mesh_send_action_meshgate(struct ieee80211_node *ni,
2969         int category, int action, void *arg0)
2970 {
2971         struct ieee80211vap *vap = ni->ni_vap;
2972         struct ieee80211com *ic = ni->ni_ic;
2973         struct ieee80211_meshgann_ie *ie = arg0;
2974         struct mbuf *m;
2975         uint8_t *frm;
2976
2977         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2978             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2979             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2980         ieee80211_ref_node(ni);
2981
2982         m = ieee80211_getmgtframe(&frm,
2983             ic->ic_headroom + sizeof(struct ieee80211_frame),
2984             sizeof(uint16_t) +  /* action+category */
2985             IEEE80211_MESHGANN_BASE_SZ
2986         );
2987         if (m != NULL) {
2988                 /*
2989                  * mesh link metric
2990                  *   [1] category
2991                  *   [1] action
2992                  *   [tlv] mesh gate annoucement
2993                  */
2994                 *frm++ = category;
2995                 *frm++ = action;
2996                 frm = ieee80211_add_meshgate(frm, ie);
2997                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2998                 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2999         } else {
3000                 vap->iv_stats.is_tx_nobuf++;
3001                 ieee80211_free_node(ni);
3002                 return ENOMEM;
3003         }
3004 }
3005
3006 static void
3007 mesh_peer_timeout_setup(struct ieee80211_node *ni)
3008 {
3009         switch (ni->ni_mlstate) {
3010         case IEEE80211_NODE_MESH_HOLDING:
3011                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
3012                 break;
3013         case IEEE80211_NODE_MESH_CONFIRMRCV:
3014                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
3015                 break;
3016         case IEEE80211_NODE_MESH_IDLE:
3017                 ni->ni_mltval = 0;
3018                 break;
3019         default:
3020                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
3021                 break;
3022         }
3023         if (ni->ni_mltval)
3024                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
3025                     mesh_peer_timeout_cb, ni);
3026 }
3027
3028 /*
3029  * Same as above but backoffs timer statisically 50%.
3030  */
3031 static void
3032 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3033 {
3034         uint32_t r;
3035
3036         r = arc4random();
3037         ni->ni_mltval += r % ni->ni_mltval;
3038         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3039             ni);
3040 }
3041
3042 static __inline void
3043 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3044 {
3045         callout_drain(&ni->ni_mltimer);
3046 }
3047
3048 static void
3049 mesh_peer_backoff_cb(void *arg)
3050 {
3051         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3052
3053         /* After backoff timeout, try to peer automatically again. */
3054         ni->ni_mlhcnt = 0;
3055 }
3056
3057 /*
3058  * Mesh Peer Link Management FSM timeout handling.
3059  */
3060 static void
3061 mesh_peer_timeout_cb(void *arg)
3062 {
3063         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3064         uint16_t args[3];
3065
3066         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3067             ni, "mesh link timeout, state %d, retry counter %d",
3068             ni->ni_mlstate, ni->ni_mlrcnt);
3069
3070         switch (ni->ni_mlstate) {
3071         case IEEE80211_NODE_MESH_IDLE:
3072         case IEEE80211_NODE_MESH_ESTABLISHED:
3073                 break;
3074         case IEEE80211_NODE_MESH_OPENSNT:
3075         case IEEE80211_NODE_MESH_OPENRCV:
3076                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3077                         args[0] = ni->ni_mlpid;
3078                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3079                         ieee80211_send_action(ni,
3080                             IEEE80211_ACTION_CAT_SELF_PROT,
3081                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3082                         ni->ni_mlrcnt = 0;
3083                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3084                         mesh_peer_timeout_setup(ni);
3085                 } else {
3086                         args[0] = ni->ni_mlpid;
3087                         ieee80211_send_action(ni,
3088                             IEEE80211_ACTION_CAT_SELF_PROT,
3089                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
3090                         ni->ni_mlrcnt++;
3091                         mesh_peer_timeout_backoff(ni);
3092                 }
3093                 break;
3094         case IEEE80211_NODE_MESH_CONFIRMRCV:
3095                 args[0] = ni->ni_mlpid;
3096                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3097                 ieee80211_send_action(ni,
3098                     IEEE80211_ACTION_CAT_SELF_PROT,
3099                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3100                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3101                 mesh_peer_timeout_setup(ni);
3102                 break;
3103         case IEEE80211_NODE_MESH_HOLDING:
3104                 ni->ni_mlhcnt++;
3105                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3106                         callout_reset(&ni->ni_mlhtimer,
3107                             ieee80211_mesh_backofftimeout,
3108                             mesh_peer_backoff_cb, ni);
3109                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3110                 break;
3111         }
3112 }
3113
3114 static int
3115 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3116 {
3117         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3118
3119         if (ie == NULL || ie[1] != ms->ms_idlen)
3120                 return 1;
3121         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3122 }
3123
3124 /*
3125  * Check if we are using the same algorithms for this mesh.
3126  */
3127 static int
3128 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3129 {
3130         const struct ieee80211_meshconf_ie *meshconf =
3131             (const struct ieee80211_meshconf_ie *) ie;
3132         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3133
3134         if (meshconf == NULL)
3135                 return 1;
3136         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3137                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3138                     "unknown path selection algorithm: 0x%x\n",
3139                     meshconf->conf_pselid);
3140                 return 1;
3141         }
3142         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3143                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3144                     "unknown path metric algorithm: 0x%x\n",
3145                     meshconf->conf_pmetid);
3146                 return 1;
3147         }
3148         if (meshconf->conf_ccid != 0) {
3149                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3150                     "unknown congestion control algorithm: 0x%x\n",
3151                     meshconf->conf_ccid);
3152                 return 1;
3153         }
3154         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3155                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3156                     "unknown sync algorithm: 0x%x\n",
3157                     meshconf->conf_syncid);
3158                 return 1;
3159         }
3160         if (meshconf->conf_authid != 0) {
3161                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3162                     "unknown auth auth algorithm: 0x%x\n",
3163                     meshconf->conf_pselid);
3164                 return 1;
3165         }
3166         /* Not accepting peers */
3167         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3168                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3169                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
3170                 return 1;
3171         }
3172         return 0;
3173 }
3174
3175 static int
3176 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3177     const uint8_t *ie)
3178 {
3179         const struct ieee80211_meshpeer_ie *meshpeer =
3180             (const struct ieee80211_meshpeer_ie *) ie;
3181
3182         if (meshpeer == NULL ||
3183             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3184             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3185                 return 1;
3186         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3187                 IEEE80211_DPRINTF(vap,
3188                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3189                     "Only MPM protocol is supported (proto: 0x%02X)",
3190                     meshpeer->peer_proto);
3191                 return 1;
3192         }
3193         switch (subtype) {
3194         case IEEE80211_ACTION_MESHPEERING_OPEN:
3195                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3196                         return 1;
3197                 break;
3198         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3199                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3200                         return 1;
3201                 break;
3202         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3203                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3204                         return 1;
3205                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3206                     meshpeer->peer_linkid != 0)
3207                         return 1;
3208                 if (meshpeer->peer_rcode == 0)
3209                         return 1;
3210                 break;
3211         }
3212         return 0;
3213 }
3214
3215 /*
3216  * Add a Mesh ID IE to a frame.
3217  */
3218 uint8_t *
3219 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3220 {
3221         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3222
3223         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3224
3225         *frm++ = IEEE80211_ELEMID_MESHID;
3226         *frm++ = ms->ms_idlen;
3227         memcpy(frm, ms->ms_id, ms->ms_idlen);
3228         return frm + ms->ms_idlen;
3229 }
3230
3231 /*
3232  * Add a Mesh Configuration IE to a frame.
3233  * For now just use HWMP routing, Airtime link metric, Null Congestion
3234  * Signaling, Null Sync Protocol and Null Authentication.
3235  */
3236 uint8_t *
3237 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3238 {
3239         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3240         uint16_t caps;
3241
3242         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3243
3244         *frm++ = IEEE80211_ELEMID_MESHCONF;
3245         *frm++ = IEEE80211_MESH_CONF_SZ;
3246         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
3247         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
3248         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3249         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3250         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3251         /* NB: set the number of neighbors before the rest */
3252         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3253             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3254         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3255                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3256         frm += 1;
3257         caps = 0;
3258         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3259                 caps |= IEEE80211_MESHCONF_CAP_AP;
3260         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3261                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3262         *frm++ = caps;
3263         return frm;
3264 }
3265
3266 /*
3267  * Add a Mesh Peer Management IE to a frame.
3268  */
3269 uint8_t *
3270 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3271     uint16_t peerid, uint16_t reason)
3272 {
3273
3274         KASSERT(localid != 0, ("localid == 0"));
3275
3276         *frm++ = IEEE80211_ELEMID_MESHPEER;
3277         switch (subtype) {
3278         case IEEE80211_ACTION_MESHPEERING_OPEN:
3279                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
3280                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3281                 ADDSHORT(frm, localid);                 /* local ID */
3282                 break;
3283         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3284                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3285                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
3286                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3287                 ADDSHORT(frm, localid);                 /* local ID */
3288                 ADDSHORT(frm, peerid);                  /* peer ID */
3289                 break;
3290         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3291                 if (peerid)
3292                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
3293                 else
3294                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3295                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3296                 ADDSHORT(frm, localid); /* local ID */
3297                 if (peerid)
3298                         ADDSHORT(frm, peerid);  /* peer ID */
3299                 ADDSHORT(frm, reason);
3300                 break;
3301         }
3302         return frm;
3303 }
3304
3305 /*
3306  * Compute an Airtime Link Metric for the link with this node.
3307  *
3308  * Based on Draft 3.0 spec (11B.10, p.149).
3309  */
3310 /*
3311  * Max 802.11s overhead.
3312  */
3313 #define IEEE80211_MESH_MAXOVERHEAD \
3314         (sizeof(struct ieee80211_qosframe_addr4) \
3315          + sizeof(struct ieee80211_meshcntl_ae10) \
3316         + sizeof(struct llc) \
3317         + IEEE80211_ADDR_LEN \
3318         + IEEE80211_WEP_IVLEN \
3319         + IEEE80211_WEP_KIDLEN \
3320         + IEEE80211_WEP_CRCLEN \
3321         + IEEE80211_WEP_MICLEN \
3322         + IEEE80211_CRC_LEN)
3323 uint32_t
3324 mesh_airtime_calc(struct ieee80211_node *ni)
3325 {
3326 #define M_BITS 8
3327 #define S_FACTOR (2 * M_BITS)
3328         struct ieee80211com *ic = ni->ni_ic;
3329         struct ifnet *ifp = ni->ni_vap->iv_ifp;
3330         const static int nbits = 8192 << M_BITS;
3331         uint32_t overhead, rate, errrate;
3332         uint64_t res;
3333
3334         /* Time to transmit a frame */
3335         rate = ni->ni_txrate;
3336         overhead = ieee80211_compute_duration(ic->ic_rt,
3337             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3338         /* Error rate in percentage */
3339         /* XXX assuming small failures are ok */
3340         errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
3341             ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
3342             / 100;
3343         res = (overhead + (nbits / rate)) *
3344             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3345
3346         return (uint32_t)(res >> S_FACTOR);
3347 #undef M_BITS
3348 #undef S_FACTOR
3349 }
3350
3351 /*
3352  * Add a Mesh Link Metric report IE to a frame.
3353  */
3354 uint8_t *
3355 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3356 {
3357         *frm++ = IEEE80211_ELEMID_MESHLINK;
3358         *frm++ = 5;
3359         *frm++ = flags;
3360         ADDWORD(frm, metric);
3361         return frm;
3362 }
3363
3364 /*
3365  * Add a Mesh Gate Announcement IE to a frame.
3366  */
3367 uint8_t *
3368 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3369 {
3370         *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3371         *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3372         *frm++ = ie->gann_flags;
3373         *frm++ = ie->gann_hopcount;
3374         *frm++ = ie->gann_ttl;
3375         IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3376         frm += 6;
3377         ADDWORD(frm, ie->gann_seq);
3378         ADDSHORT(frm, ie->gann_interval);
3379         return frm;
3380 }
3381 #undef ADDSHORT
3382 #undef ADDWORD
3383
3384 /*
3385  * Initialize any mesh-specific node state.
3386  */
3387 void
3388 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3389 {
3390         ni->ni_flags |= IEEE80211_NODE_QOS;
3391         callout_init(&ni->ni_mltimer, 1);
3392         callout_init(&ni->ni_mlhtimer, 1);
3393 }
3394
3395 /*
3396  * Cleanup any mesh-specific node state.
3397  */
3398 void
3399 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3400 {
3401         struct ieee80211vap *vap = ni->ni_vap;
3402         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3403
3404         callout_drain(&ni->ni_mltimer);
3405         callout_drain(&ni->ni_mlhtimer);
3406         /* NB: short-circuit callbacks after mesh_vdetach */
3407         if (vap->iv_mesh != NULL)
3408                 ms->ms_ppath->mpp_peerdown(ni);
3409 }
3410
3411 void
3412 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3413 {
3414         ni->ni_meshidlen = ie[1];
3415         memcpy(ni->ni_meshid, ie + 2, ie[1]);
3416 }
3417
3418 /*
3419  * Setup mesh-specific node state on neighbor discovery.
3420  */
3421 void
3422 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3423         const struct ieee80211_frame *wh,
3424         const struct ieee80211_scanparams *sp)
3425 {
3426         ieee80211_parse_meshid(ni, sp->meshid);
3427 }
3428
3429 void
3430 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3431         struct ieee80211_beacon_offsets *bo)
3432 {
3433         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3434
3435         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3436                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3437                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3438         }
3439 }
3440
3441 static int
3442 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3443 {
3444         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3445         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3446         struct ieee80211_mesh_route *rt;
3447         struct ieee80211req_mesh_route *imr;
3448         size_t len, off;
3449         uint8_t *p;
3450         int error;
3451
3452         if (vap->iv_opmode != IEEE80211_M_MBSS)
3453                 return ENOSYS;
3454
3455         error = 0;
3456         switch (ireq->i_type) {
3457         case IEEE80211_IOC_MESH_ID:
3458                 ireq->i_len = ms->ms_idlen;
3459                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3460                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3461                 break;
3462         case IEEE80211_IOC_MESH_AP:
3463                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3464                 break;
3465         case IEEE80211_IOC_MESH_FWRD:
3466                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3467                 break;
3468         case IEEE80211_IOC_MESH_GATE:
3469                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3470                 break;
3471         case IEEE80211_IOC_MESH_TTL:
3472                 ireq->i_val = ms->ms_ttl;
3473                 break;
3474         case IEEE80211_IOC_MESH_RTCMD:
3475                 switch (ireq->i_val) {
3476                 case IEEE80211_MESH_RTCMD_LIST:
3477                         len = 0;
3478                         MESH_RT_LOCK(ms);
3479                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3480                                 len += sizeof(*imr);
3481                         }
3482                         MESH_RT_UNLOCK(ms);
3483                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3484                                 ireq->i_len = len;
3485                                 return ENOMEM;
3486                         }
3487                         ireq->i_len = len;
3488                         /* XXX M_WAIT? */
3489                         p = IEEE80211_MALLOC(len, M_TEMP,
3490                             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
3491                         if (p == NULL)
3492                                 return ENOMEM;
3493                         off = 0;
3494                         MESH_RT_LOCK(ms);
3495                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3496                                 if (off >= len)
3497                                         break;
3498                                 imr = (struct ieee80211req_mesh_route *)
3499                                     (p + off);
3500                                 IEEE80211_ADDR_COPY(imr->imr_dest,
3501                                     rt->rt_dest);
3502                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3503                                     rt->rt_nexthop);
3504                                 imr->imr_metric = rt->rt_metric;
3505                                 imr->imr_nhops = rt->rt_nhops;
3506                                 imr->imr_lifetime =
3507                                     ieee80211_mesh_rt_update(rt, 0);
3508                                 imr->imr_lastmseq = rt->rt_lastmseq;
3509                                 imr->imr_flags = rt->rt_flags; /* last */
3510                                 off += sizeof(*imr);
3511                         }
3512                         MESH_RT_UNLOCK(ms);
3513                         error = copyout(p, (uint8_t *)ireq->i_data,
3514                             ireq->i_len);
3515                         IEEE80211_FREE(p, M_TEMP);
3516                         break;
3517                 case IEEE80211_MESH_RTCMD_FLUSH:
3518                 case IEEE80211_MESH_RTCMD_ADD:
3519                 case IEEE80211_MESH_RTCMD_DELETE:
3520                         return EINVAL;
3521                 default:
3522                         return ENOSYS;
3523                 }
3524                 break;
3525         case IEEE80211_IOC_MESH_PR_METRIC:
3526                 len = strlen(ms->ms_pmetric->mpm_descr);
3527                 if (ireq->i_len < len)
3528                         return EINVAL;
3529                 ireq->i_len = len;
3530                 error = copyout(ms->ms_pmetric->mpm_descr,
3531                     (uint8_t *)ireq->i_data, len);
3532                 break;
3533         case IEEE80211_IOC_MESH_PR_PATH:
3534                 len = strlen(ms->ms_ppath->mpp_descr);
3535                 if (ireq->i_len < len)
3536                         return EINVAL;
3537                 ireq->i_len = len;
3538                 error = copyout(ms->ms_ppath->mpp_descr,
3539                     (uint8_t *)ireq->i_data, len);
3540                 break;
3541         default:
3542                 return ENOSYS;
3543         }
3544
3545         return error;
3546 }
3547 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3548
3549 static int
3550 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3551 {
3552         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3553         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3554         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3555         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3556         int error;
3557
3558         if (vap->iv_opmode != IEEE80211_M_MBSS)
3559                 return ENOSYS;
3560
3561         error = 0;
3562         switch (ireq->i_type) {
3563         case IEEE80211_IOC_MESH_ID:
3564                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3565                         return EINVAL;
3566                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3567                 if (error != 0)
3568                         break;
3569                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3570                 ms->ms_idlen = ireq->i_len;
3571                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3572                 error = ENETRESET;
3573                 break;
3574         case IEEE80211_IOC_MESH_AP:
3575                 if (ireq->i_val)
3576                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3577                 else
3578                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3579                 error = ENETRESET;
3580                 break;
3581         case IEEE80211_IOC_MESH_FWRD:
3582                 if (ireq->i_val)
3583                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3584                 else
3585                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3586                 mesh_gatemode_setup(vap);
3587                 break;
3588         case IEEE80211_IOC_MESH_GATE:
3589                 if (ireq->i_val)
3590                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3591                 else
3592                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3593                 break;
3594         case IEEE80211_IOC_MESH_TTL:
3595                 ms->ms_ttl = (uint8_t) ireq->i_val;
3596                 break;
3597         case IEEE80211_IOC_MESH_RTCMD:
3598                 switch (ireq->i_val) {
3599                 case IEEE80211_MESH_RTCMD_LIST:
3600                         return EINVAL;
3601                 case IEEE80211_MESH_RTCMD_FLUSH:
3602                         ieee80211_mesh_rt_flush(vap);
3603                         break;
3604                 case IEEE80211_MESH_RTCMD_ADD:
3605                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
3606                             IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
3607                                 return EINVAL;
3608                         error = copyin(ireq->i_data, &tmpaddr,
3609                             IEEE80211_ADDR_LEN);
3610                         if (error == 0)
3611                                 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3612                         break;
3613                 case IEEE80211_MESH_RTCMD_DELETE:
3614                         ieee80211_mesh_rt_del(vap, ireq->i_data);
3615                         break;
3616                 default:
3617                         return ENOSYS;
3618                 }
3619                 break;
3620         case IEEE80211_IOC_MESH_PR_METRIC:
3621                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3622                 if (error == 0) {
3623                         error = mesh_select_proto_metric(vap, tmpproto);
3624                         if (error == 0)
3625                                 error = ENETRESET;
3626                 }
3627                 break;
3628         case IEEE80211_IOC_MESH_PR_PATH:
3629                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3630                 if (error == 0) {
3631                         error = mesh_select_proto_path(vap, tmpproto);
3632                         if (error == 0)
3633                                 error = ENETRESET;
3634                 }
3635                 break;
3636         default:
3637                 return ENOSYS;
3638         }
3639         return error;
3640 }
3641 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);