sys/netproto/802_11/wlan/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 <netproto/802_11/ieee80211_var.h>
  63 #include <netproto/802_11/ieee80211_action.h>
  64 #ifdef IEEE80211_SUPPORT_SUPERG
  65 #include <netproto/802_11/ieee80211_superg.h>
  66 #endif
  67 #include <netproto/802_11/ieee80211_input.h>
  68 #include <netproto/802_11/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 *, int, int);
  89 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
  90                     int, int);
  91 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  92 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
  93 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
  94 static void     mesh_peer_timeout_cb(void *);
  95 static __inline void
  96                 mesh_peer_timeout_stop(struct ieee80211_node *);
  97 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
  98 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
  99 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
 100                     const uint8_t *);
 101 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
 102
 103 /*
 104  * Timeout values come from the specification and are in milliseconds.
 105  */
 106 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
 107     "IEEE 802.11s parameters");
 108 static int      ieee80211_mesh_gateint = -1;
 109 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW,
 110     &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
 111     "mesh gate interval (ms)");
 112 static int ieee80211_mesh_retrytimeout = -1;
 113 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
 114     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 115     "Retry timeout (msec)");
 116 static int ieee80211_mesh_holdingtimeout = -1;
 117
 118 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
 119     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 120     "Holding state timeout (msec)");
 121 static int ieee80211_mesh_confirmtimeout = -1;
 122 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
 123     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 124     "Confirm state timeout (msec)");
 125 static int ieee80211_mesh_backofftimeout = -1;
 126 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW,
 127     &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 128     "Backoff timeout (msec). This is to throutles peering forever when "
 129     "not receiving answer or is rejected by a neighbor");
 130 static int ieee80211_mesh_maxretries = 2;
 131 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW,
 132     &ieee80211_mesh_maxretries, 0,
 133     "Maximum retries during peer link establishment");
 134 static int ieee80211_mesh_maxholding = 2;
 135 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW,
 136     &ieee80211_mesh_maxholding, 0,
 137     "Maximum times we are allowed to transition to HOLDING state before "
 138     "backinoff during peer link establishment");
 139
 140 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
 141         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 142
 143 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
 144 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
 145 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
 146 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
 147 static  ieee80211_recv_action_func mesh_recv_action_meshgate;
 148
 149 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
 150 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
 151 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
 152 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
 153 static  ieee80211_send_action_func mesh_send_action_meshgate;
 154
 155 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
 156         .mpm_descr      = "AIRTIME",
 157         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
 158         .mpm_metric     = mesh_airtime_calc,
 159 };
 160
 161 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
 162 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
 163
 164 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
 165 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
 166 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
 167
 168 /* The longer one of the lifetime should be stored as new lifetime */
 169 #define MESH_ROUTE_LIFETIME_MAX(a, b)   (a > b ? a : b)
 170
 171 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
 172 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
 173
 174 /*
 175  * Helper functions to manipulate the Mesh routing table.
 176  */
 177
 178 static struct ieee80211_mesh_route *
 179 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
 180     const uint8_t dest[IEEE80211_ADDR_LEN])
 181 {
 182         struct ieee80211_mesh_route *rt;
 183
 184         MESH_RT_LOCK_ASSERT(ms);
 185
 186         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 187                 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
 188                         return rt;
 189         }
 190         return NULL;
 191 }
 192
 193 static struct ieee80211_mesh_route *
 194 mesh_rt_add_locked(struct ieee80211vap *vap,
 195     const uint8_t dest[IEEE80211_ADDR_LEN])
 196 {
 197         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 198         struct ieee80211_mesh_route *rt;
 199
 200         KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
 201             ("%s: adding broadcast to the routing table", __func__));
 202
 203         MESH_RT_LOCK_ASSERT(ms);
 204
 205         rt = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_route)) +
 206             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_INTWAIT | M_ZERO);
 207         if (rt != NULL) {
 208                 rt->rt_vap = vap;
 209                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
 210                 rt->rt_priv = (void *)ALIGN(&rt[1]);
 211                 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT");
 212                 callout_init_mp(&rt->rt_discovery);
 213                 rt->rt_updtime = ticks; /* create time */
 214                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
 215         }
 216         return rt;
 217 }
 218
 219 struct ieee80211_mesh_route *
 220 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
 221     const uint8_t dest[IEEE80211_ADDR_LEN])
 222 {
 223         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 224         struct ieee80211_mesh_route *rt;
 225
 226         MESH_RT_LOCK(ms);
 227         rt = mesh_rt_find_locked(ms, dest);
 228         MESH_RT_UNLOCK(ms);
 229         return rt;
 230 }
 231
 232 struct ieee80211_mesh_route *
 233 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
 234     const uint8_t dest[IEEE80211_ADDR_LEN])
 235 {
 236         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 237         struct ieee80211_mesh_route *rt;
 238
 239         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
 240             ("%s: duplicate entry in the routing table", __func__));
 241         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
 242             ("%s: adding self to the routing table", __func__));
 243
 244         MESH_RT_LOCK(ms);
 245         rt = mesh_rt_add_locked(vap, dest);
 246         MESH_RT_UNLOCK(ms);
 247         return rt;
 248 }
 249
 250 /*
 251  * Update the route lifetime and returns the updated lifetime.
 252  * If new_lifetime is zero and route is timedout it will be invalidated.
 253  * new_lifetime is in msec
 254  */
 255 int
 256 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
 257 {
 258         int timesince, now;
 259         uint32_t lifetime = 0;
 260
 261         KASSERT(rt != NULL, ("route is NULL"));
 262
 263         now = ticks;
 264         MESH_RT_ENTRY_LOCK(rt);
 265
 266         /* dont clobber a proxy entry gated by us */
 267         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
 268                 MESH_RT_ENTRY_UNLOCK(rt);
 269                 return rt->rt_lifetime;
 270         }
 271
 272         timesince = ticks_to_msecs(now - rt->rt_updtime);
 273         rt->rt_updtime = now;
 274         if (timesince >= rt->rt_lifetime) {
 275                 if (new_lifetime != 0) {
 276                         rt->rt_lifetime = new_lifetime;
 277                 }
 278                 else {
 279                         rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
 280                         rt->rt_lifetime = 0;
 281                 }
 282         } else {
 283                 /* update what is left of lifetime */
 284                 rt->rt_lifetime = rt->rt_lifetime - timesince;
 285                 rt->rt_lifetime  = MESH_ROUTE_LIFETIME_MAX(
 286                         new_lifetime, rt->rt_lifetime);
 287         }
 288         lifetime = rt->rt_lifetime;
 289         MESH_RT_ENTRY_UNLOCK(rt);
 290
 291         return lifetime;
 292 }
 293
 294 /*
 295  * Add a proxy route (as needed) for the specified destination.
 296  */
 297 void
 298 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
 299     const uint8_t dest[IEEE80211_ADDR_LEN])
 300 {
 301         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 302         struct ieee80211_mesh_route *rt;
 303
 304         MESH_RT_LOCK(ms);
 305         rt = mesh_rt_find_locked(ms, dest);
 306         if (rt == NULL) {
 307                 rt = mesh_rt_add_locked(vap, dest);
 308                 if (rt == NULL) {
 309                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 310                             "%s", "unable to add proxy entry");
 311                         vap->iv_stats.is_mesh_rtaddfailed++;
 312                 } else {
 313                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 314                             "%s", "add proxy entry");
 315                         IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
 316                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 317                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 318                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
 319                 }
 320         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 321                 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
 322                     ("no proxy flag for poxy entry"));
 323                 struct ieee80211com *ic = vap->iv_ic;
 324                 /*
 325                  * Fix existing entry created by received frames from
 326                  * stations that have some memory of dest.  We also
 327                  * flush any frames held on the staging queue; delivering
 328                  * them is too much trouble right now.
 329                  */
 330                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 331                     "%s", "fix proxy entry");
 332                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 333                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 334                              |  IEEE80211_MESHRT_FLAGS_PROXY;
 335                 /* XXX belongs in hwmp */
 336                 ieee80211_ageq_drain_node(&ic->ic_stageq,
 337                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
 338                 /* XXX stat? */
 339         }
 340         MESH_RT_UNLOCK(ms);
 341 }
 342
 343 static __inline void
 344 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
 345 {
 346         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
 347         /*
 348          * Grab the lock before destroying it, to be sure no one else
 349          * is holding the route.
 350          */
 351         MESH_RT_ENTRY_LOCK(rt);
 352         callout_drain(&rt->rt_discovery);
 353         MESH_RT_ENTRY_LOCK_DESTROY(rt);
 354         kfree(rt, M_80211_MESH_RT);
 355 }
 356
 357 void
 358 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
 359     const uint8_t dest[IEEE80211_ADDR_LEN])
 360 {
 361         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 362         struct ieee80211_mesh_route *rt, *next;
 363
 364         MESH_RT_LOCK(ms);
 365         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 366                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
 367                         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
 368                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 369                                     IEEE80211_REASON_MESH_PERR_NO_PROXY);
 370                         } else {
 371                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 372                                     IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
 373                         }
 374                         mesh_rt_del(ms, rt);
 375                         MESH_RT_UNLOCK(ms);
 376                         return;
 377                 }
 378         }
 379         MESH_RT_UNLOCK(ms);
 380 }
 381
 382 void
 383 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
 384 {
 385         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 386         struct ieee80211_mesh_route *rt, *next;
 387
 388         if (ms == NULL)
 389                 return;
 390         MESH_RT_LOCK(ms);
 391         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
 392                 mesh_rt_del(ms, rt);
 393         MESH_RT_UNLOCK(ms);
 394 }
 395
 396 void
 397 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
 398     const uint8_t peer[IEEE80211_ADDR_LEN])
 399 {
 400         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 401         struct ieee80211_mesh_route *rt, *next;
 402
 403         MESH_RT_LOCK(ms);
 404         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 405                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
 406                         mesh_rt_del(ms, rt);
 407         }
 408         MESH_RT_UNLOCK(ms);
 409 }
 410
 411 /*
 412  * Flush expired routing entries, i.e. those in invalid state for
 413  * some time.
 414  */
 415 static void
 416 mesh_rt_flush_invalid(struct ieee80211vap *vap)
 417 {
 418         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 419         struct ieee80211_mesh_route *rt, *next;
 420
 421         if (ms == NULL)
 422                 return;
 423         MESH_RT_LOCK(ms);
 424         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 425                 /* Discover paths will be deleted by their own callout */
 426                 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
 427                         continue;
 428                 ieee80211_mesh_rt_update(rt, 0);
 429                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
 430                         mesh_rt_del(ms, rt);
 431         }
 432         MESH_RT_UNLOCK(ms);
 433 }
 434
 435 #define N(a)    (sizeof(a) / sizeof(a[0]))
 436 int
 437 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
 438 {
 439         int i, firstempty = -1;
 440
 441         for (i = 0; i < N(mesh_proto_paths); i++) {
 442                 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
 443                     IEEE80211_MESH_PROTO_DSZ) == 0)
 444                         return EEXIST;
 445                 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
 446                         firstempty = i;
 447         }
 448         if (firstempty < 0)
 449                 return ENOSPC;
 450         memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
 451         mesh_proto_paths[firstempty].mpp_active = 1;
 452         return 0;
 453 }
 454
 455 int
 456 ieee80211_mesh_register_proto_metric(const struct
 457     ieee80211_mesh_proto_metric *mpm)
 458 {
 459         int i, firstempty = -1;
 460
 461         for (i = 0; i < N(mesh_proto_metrics); i++) {
 462                 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
 463                     IEEE80211_MESH_PROTO_DSZ) == 0)
 464                         return EEXIST;
 465                 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
 466                         firstempty = i;
 467         }
 468         if (firstempty < 0)
 469                 return ENOSPC;
 470         memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
 471         mesh_proto_metrics[firstempty].mpm_active = 1;
 472         return 0;
 473 }
 474
 475 static int
 476 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
 477 {
 478         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 479         int i;
 480
 481         for (i = 0; i < N(mesh_proto_paths); i++) {
 482                 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
 483                         ms->ms_ppath = &mesh_proto_paths[i];
 484                         return 0;
 485                 }
 486         }
 487         return ENOENT;
 488 }
 489
 490 static int
 491 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
 492 {
 493         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 494         int i;
 495
 496         for (i = 0; i < N(mesh_proto_metrics); i++) {
 497                 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
 498                         ms->ms_pmetric = &mesh_proto_metrics[i];
 499                         return 0;
 500                 }
 501         }
 502         return ENOENT;
 503 }
 504 #undef  N
 505
 506 static void
 507 mesh_gatemode_setup(struct ieee80211vap *vap)
 508 {
 509         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 510
 511         /*
 512          * NB: When a mesh gate is running as a ROOT it shall
 513          * not send out periodic GANNs but instead mark the
 514          * mesh gate flag for the corresponding proactive PREQ
 515          * and RANN frames.
 516          */
 517         if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
 518             (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
 519                 callout_drain(&ms->ms_gatetimer);
 520                 return ;
 521         }
 522         callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
 523             mesh_gatemode_cb, vap);
 524 }
 525
 526 static void
 527 mesh_gatemode_cb(void *arg)
 528 {
 529         struct ieee80211vap *vap = (struct ieee80211vap *)arg;
 530         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 531         struct ieee80211_meshgann_ie gann;
 532
 533         gann.gann_flags = 0; /* Reserved */
 534         gann.gann_hopcount = 0;
 535         gann.gann_ttl = ms->ms_ttl;
 536         IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
 537         gann.gann_seq = ms->ms_gateseq++;
 538         gann.gann_interval = ieee80211_mesh_gateint;
 539
 540         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
 541             "send broadcast GANN (seq %u)", gann.gann_seq);
 542
 543         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
 544             IEEE80211_ACTION_MESH_GANN, &gann);
 545         mesh_gatemode_setup(vap);
 546 }
 547
 548 static void
 549 ieee80211_mesh_init(void)
 550 {
 551
 552         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
 553         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
 554
 555         /*
 556          * Setup mesh parameters that depends on the clock frequency.
 557          */
 558         ieee80211_mesh_gateint = msecs_to_ticks(10000);
 559         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
 560         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
 561         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
 562         ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
 563
 564         /*
 565          * Register action frame handlers.
 566          */
 567         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 568             IEEE80211_ACTION_MESHPEERING_OPEN,
 569             mesh_recv_action_meshpeering_open);
 570         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 571             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 572             mesh_recv_action_meshpeering_confirm);
 573         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 574             IEEE80211_ACTION_MESHPEERING_CLOSE,
 575             mesh_recv_action_meshpeering_close);
 576         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 577             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
 578         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 579             IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
 580
 581         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 582             IEEE80211_ACTION_MESHPEERING_OPEN,
 583             mesh_send_action_meshpeering_open);
 584         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 585             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 586             mesh_send_action_meshpeering_confirm);
 587         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 588             IEEE80211_ACTION_MESHPEERING_CLOSE,
 589             mesh_send_action_meshpeering_close);
 590         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 591             IEEE80211_ACTION_MESH_LMETRIC,
 592             mesh_send_action_meshlmetric);
 593         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 594             IEEE80211_ACTION_MESH_GANN,
 595             mesh_send_action_meshgate);
 596
 597         /*
 598          * Register Airtime Link Metric.
 599          */
 600         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
 601
 602 }
 603 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
 604
 605 void
 606 ieee80211_mesh_attach(struct ieee80211com *ic)
 607 {
 608         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
 609 }
 610
 611 void
 612 ieee80211_mesh_detach(struct ieee80211com *ic)
 613 {
 614 }
 615
 616 static void
 617 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
 618 {
 619         struct ieee80211com *ic = ni->ni_ic;
 620         uint16_t args[3];
 621
 622         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
 623                 args[0] = ni->ni_mlpid;
 624                 args[1] = ni->ni_mllid;
 625                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 626                 ieee80211_send_action(ni,
 627                     IEEE80211_ACTION_CAT_SELF_PROT,
 628                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 629                     args);
 630         }
 631         callout_drain(&ni->ni_mltimer);
 632         /* XXX belongs in hwmp */
 633         ieee80211_ageq_drain_node(&ic->ic_stageq,
 634            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
 635 }
 636
 637 static void
 638 mesh_vdetach(struct ieee80211vap *vap)
 639 {
 640         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 641
 642         callout_drain(&ms->ms_cleantimer);
 643         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
 644             NULL);
 645         ieee80211_mesh_rt_flush(vap);
 646         MESH_RT_LOCK_DESTROY(ms);
 647         ms->ms_ppath->mpp_vdetach(vap);
 648         kfree(vap->iv_mesh, M_80211_VAP);
 649         vap->iv_mesh = NULL;
 650 }
 651
 652 static void
 653 mesh_vattach(struct ieee80211vap *vap)
 654 {
 655         struct ieee80211_mesh_state *ms;
 656         vap->iv_newstate = mesh_newstate;
 657         vap->iv_input = mesh_input;
 658         vap->iv_opdetach = mesh_vdetach;
 659         vap->iv_recv_mgmt = mesh_recv_mgmt;
 660         vap->iv_recv_ctl = mesh_recv_ctl;
 661         ms = kmalloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
 662             M_INTWAIT | M_ZERO);
 663         if (ms == NULL) {
 664                 kprintf("%s: couldn't alloc MBSS state\n", __func__);
 665                 return;
 666         }
 667         vap->iv_mesh = ms;
 668         ms->ms_seq = 0;
 669         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
 670         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
 671         TAILQ_INIT(&ms->ms_known_gates);
 672         TAILQ_INIT(&ms->ms_routes);
 673         MESH_RT_LOCK_INIT(ms, "MBSS");
 674         callout_init_mp(&ms->ms_cleantimer);
 675         callout_init_mp(&ms->ms_gatetimer);
 676         ms->ms_gateseq = 0;
 677         mesh_select_proto_metric(vap, "AIRTIME");
 678         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
 679         mesh_select_proto_path(vap, "HWMP");
 680         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
 681         ms->ms_ppath->mpp_vattach(vap);
 682 }
 683
 684 /*
 685  * IEEE80211_M_MBSS vap state machine handler.
 686  */
 687 static int
 688 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 689 {
 690         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 691         struct ieee80211com *ic = vap->iv_ic;
 692         struct ieee80211_node *ni;
 693         enum ieee80211_state ostate;
 694
 695         IEEE80211_LOCK_ASSERT(ic);
 696
 697         ostate = vap->iv_state;
 698         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 699             __func__, ieee80211_state_name[ostate],
 700             ieee80211_state_name[nstate], arg);
 701         vap->iv_state = nstate;         /* state transition */
 702         if (ostate != IEEE80211_S_SCAN)
 703                 ieee80211_cancel_scan(vap);     /* background scan */
 704         ni = vap->iv_bss;                       /* NB: no reference held */
 705         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
 706                 callout_drain(&ms->ms_cleantimer);
 707                 callout_drain(&ms->ms_gatetimer);
 708         }
 709         switch (nstate) {
 710         case IEEE80211_S_INIT:
 711                 switch (ostate) {
 712                 case IEEE80211_S_SCAN:
 713                         ieee80211_cancel_scan(vap);
 714                         break;
 715                 case IEEE80211_S_CAC:
 716                         ieee80211_dfs_cac_stop(vap);
 717                         break;
 718                 case IEEE80211_S_RUN:
 719                         ieee80211_iterate_nodes(&ic->ic_sta,
 720                             mesh_vdetach_peers, NULL);
 721                         break;
 722                 default:
 723                         break;
 724                 }
 725                 if (ostate != IEEE80211_S_INIT) {
 726                         /* NB: optimize INIT -> INIT case */
 727                         ieee80211_reset_bss(vap);
 728                         ieee80211_mesh_rt_flush(vap);
 729                 }
 730                 break;
 731         case IEEE80211_S_SCAN:
 732                 switch (ostate) {
 733                 case IEEE80211_S_INIT:
 734                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 735                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
 736                             ms->ms_idlen != 0) {
 737                                 /*
 738                                  * Already have a channel and a mesh ID; bypass
 739                                  * the scan and startup immediately.
 740                                  */
 741                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 742                                 break;
 743                         }
 744                         /*
 745                          * Initiate a scan.  We can come here as a result
 746                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 747                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 748                          * and the scan request parameters will be present
 749                          * in iv_scanreq.  Otherwise we do the default.
 750                         */
 751                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 752                                 ieee80211_check_scan(vap,
 753                                     vap->iv_scanreq_flags,
 754                                     vap->iv_scanreq_duration,
 755                                     vap->iv_scanreq_mindwell,
 756                                     vap->iv_scanreq_maxdwell,
 757                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 758                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 759                         } else
 760                                 ieee80211_check_scan_current(vap);
 761                         break;
 762                 default:
 763                         break;
 764                 }
 765                 break;
 766         case IEEE80211_S_CAC:
 767                 /*
 768                  * Start CAC on a DFS channel.  We come here when starting
 769                  * a bss on a DFS channel (see ieee80211_create_ibss).
 770                  */
 771                 ieee80211_dfs_cac_start(vap);
 772                 break;
 773         case IEEE80211_S_RUN:
 774                 switch (ostate) {
 775                 case IEEE80211_S_INIT:
 776                         /*
 777                          * Already have a channel; bypass the
 778                          * scan and startup immediately.
 779                          * Note that ieee80211_create_ibss will call
 780                          * back to do a RUN->RUN state change.
 781                          */
 782                         ieee80211_create_ibss(vap,
 783                             ieee80211_ht_adjust_channel(ic,
 784                                 ic->ic_curchan, vap->iv_flags_ht));
 785                         /* NB: iv_bss is changed on return */
 786                         break;
 787                 case IEEE80211_S_CAC:
 788                         /*
 789                          * NB: This is the normal state change when CAC
 790                          * expires and no radar was detected; no need to
 791                          * clear the CAC timer as it's already expired.
 792                          */
 793                         /* fall thru... */
 794                 case IEEE80211_S_CSA:
 795 #if 0
 796                         /*
 797                          * Shorten inactivity timer of associated stations
 798                          * to weed out sta's that don't follow a CSA.
 799                          */
 800                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 801 #endif
 802                         /*
 803                          * Update bss node channel to reflect where
 804                          * we landed after CSA.
 805                          */
 806                         ieee80211_node_set_chan(vap->iv_bss,
 807                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 808                                 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
 809                         /* XXX bypass debug msgs */
 810                         break;
 811                 case IEEE80211_S_SCAN:
 812                 case IEEE80211_S_RUN:
 813 #ifdef IEEE80211_DEBUG
 814                         if (ieee80211_msg_debug(vap)) {
 815                                 struct ieee80211_node *ni = vap->iv_bss;
 816                                 ieee80211_note(vap,
 817                                     "synchronized with %s meshid ",
 818                                     ether_sprintf(ni->ni_meshid));
 819                                 ieee80211_print_essid(ni->ni_meshid,
 820                                     ni->ni_meshidlen);
 821                                 /* XXX MCS/HT */
 822                                 kprintf(" channel %d\n",
 823                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
 824                         }
 825 #endif
 826                         break;
 827                 default:
 828                         break;
 829                 }
 830                 ieee80211_node_authorize(vap->iv_bss);
 831                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 832                     mesh_rt_cleanup_cb, vap);
 833                 mesh_gatemode_setup(vap);
 834                 break;
 835         default:
 836                 break;
 837         }
 838         /* NB: ostate not nstate */
 839         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
 840         return 0;
 841 }
 842
 843 static void
 844 mesh_rt_cleanup_cb(void *arg)
 845 {
 846         struct ieee80211vap *vap = arg;
 847         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 848
 849         mesh_rt_flush_invalid(vap);
 850         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 851             mesh_rt_cleanup_cb, vap);
 852 }
 853
 854 /*
 855  * Mark a mesh STA as gate and return a pointer to it.
 856  * If this is first time, we create a new gate route.
 857  * Always update the path route to this mesh gate.
 858  */
 859 struct ieee80211_mesh_gate_route *
 860 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
 861     struct ieee80211_mesh_route *rt)
 862 {
 863         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 864         struct ieee80211_mesh_gate_route *gr = NULL, *next;
 865         int found = 0;
 866
 867         MESH_RT_LOCK(ms);
 868         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
 869                 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
 870                         found = 1;
 871                         break;
 872                 }
 873         }
 874
 875         if (!found) {
 876                 /* New mesh gate add it to known table. */
 877                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
 878                     "%s", "stored new gate information from pro-PREQ.");
 879                 gr = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
 880                     M_80211_MESH_GT_RT, M_INTWAIT | M_ZERO);
 881                 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
 882                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
 883         }
 884         gr->gr_route = rt;
 885         /* TODO: link from path route to gate route */
 886         MESH_RT_UNLOCK(ms);
 887
 888         return gr;
 889 }
 890
 891
 892 /*
 893  * Helper function to note the Mesh Peer Link FSM change.
 894  */
 895 static void
 896 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
 897 {
 898         struct ieee80211vap *vap = ni->ni_vap;
 899         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 900 #ifdef IEEE80211_DEBUG
 901         static const char *meshlinkstates[] = {
 902                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
 903                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
 904                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
 905                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
 906                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
 907                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
 908         };
 909 #endif
 910         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
 911             ni, "peer link: %s -> %s",
 912             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
 913
 914         /* track neighbor count */
 915         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
 916             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 917                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
 918                 ms->ms_neighbors++;
 919                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 920         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
 921             state != IEEE80211_NODE_MESH_ESTABLISHED) {
 922                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
 923                 ms->ms_neighbors--;
 924                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 925         }
 926         ni->ni_mlstate = state;
 927         switch (state) {
 928         case IEEE80211_NODE_MESH_HOLDING:
 929                 ms->ms_ppath->mpp_peerdown(ni);
 930                 break;
 931         case IEEE80211_NODE_MESH_ESTABLISHED:
 932                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
 933                 break;
 934         default:
 935                 break;
 936         }
 937 }
 938
 939 /*
 940  * Helper function to generate a unique local ID required for mesh
 941  * peer establishment.
 942  */
 943 static void
 944 mesh_checkid(void *arg, struct ieee80211_node *ni)
 945 {
 946         uint16_t *r = arg;
 947
 948         if (*r == ni->ni_mllid)
 949                 *(uint16_t *)arg = 0;
 950 }
 951
 952 static uint32_t
 953 mesh_generateid(struct ieee80211vap *vap)
 954 {
 955         int maxiter = 4;
 956         uint16_t r;
 957
 958         do {
 959                 get_random_bytes(&r, 2);
 960                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
 961                 maxiter--;
 962         } while (r == 0 && maxiter > 0);
 963         return r;
 964 }
 965
 966 /*
 967  * Verifies if we already received this packet by checking its
 968  * sequence number.
 969  * Returns 0 if the frame is to be accepted, 1 otherwise.
 970  */
 971 static int
 972 mesh_checkpseq(struct ieee80211vap *vap,
 973     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
 974 {
 975         struct ieee80211_mesh_route *rt;
 976
 977         rt = ieee80211_mesh_rt_find(vap, source);
 978         if (rt == NULL) {
 979                 rt = ieee80211_mesh_rt_add(vap, source);
 980                 if (rt == NULL) {
 981                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 982                             "%s", "add mcast route failed");
 983                         vap->iv_stats.is_mesh_rtaddfailed++;
 984                         return 1;
 985                 }
 986                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 987                     "add mcast route, mesh seqno %d", seq);
 988                 rt->rt_lastmseq = seq;
 989                 return 0;
 990         }
 991         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
 992                 return 1;
 993         } else {
 994                 rt->rt_lastmseq = seq;
 995                 return 0;
 996         }
 997 }
 998
 999 /*
1000  * Iterate the routing table and locate the next hop.
1001  */
1002 struct ieee80211_node *
1003 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1004     const uint8_t dest[IEEE80211_ADDR_LEN])
1005 {
1006         struct ieee80211_mesh_route *rt;
1007
1008         rt = ieee80211_mesh_rt_find(vap, dest);
1009         if (rt == NULL)
1010                 return NULL;
1011         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1012                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1013                     "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1014                 /* XXX stat */
1015                 return NULL;
1016         }
1017         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1018                 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1019                 if (rt == NULL) return NULL;
1020                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1021                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1022                             "%s: meshgate !valid, flags 0x%x", __func__,
1023                             rt->rt_flags);
1024                         /* XXX stat */
1025                         return NULL;
1026                 }
1027         }
1028         return ieee80211_find_txnode(vap, rt->rt_nexthop);
1029 }
1030
1031 static void
1032 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1033     struct ieee80211_mesh_route *rt_gate)
1034 {
1035         struct ifnet *ifp = vap->iv_ifp;
1036         struct ieee80211_node *ni;
1037
1038         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1039
1040         ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1041         if (ni == NULL) {
1042                 IFNET_STAT_INC(ifp, oerrors, 1);
1043                 m_freem(m);
1044                 return;
1045         }
1046
1047         /*
1048          * Send through the VAP packet transmit path.
1049          * This consumes the node ref grabbed above and
1050          * the mbuf, regardless of whether there's a problem
1051          * or not.
1052          */
1053         (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1054 }
1055
1056 /*
1057  * Forward the queued frames to known valid mesh gates.
1058  * Assume destination to be outside the MBSS (i.e. proxy entry),
1059  * If no valid mesh gates are known silently discard queued frames.
1060  * After transmitting frames to all known valid mesh gates, this route
1061  * will be marked invalid, and a new path discovery will happen in the hopes
1062  * that (at least) one of the mesh gates have a new proxy entry for us to use.
1063  */
1064 void
1065 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1066     struct ieee80211_mesh_route *rt_dest)
1067 {
1068         struct ieee80211com *ic = vap->iv_ic;
1069         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1070         struct ieee80211_mesh_route *rt_gate;
1071         struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1072         struct mbuf *m, *mcopy, *next;
1073
1074         IEEE80211_TX_UNLOCK_ASSERT(ic);
1075
1076         KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1077             ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1078
1079         /* XXX: send to more than one valid mash gate */
1080         MESH_RT_LOCK(ms);
1081
1082         m = ieee80211_ageq_remove(&ic->ic_stageq,
1083             (struct ieee80211_node *)(uintptr_t)
1084             ieee80211_mac_hash(ic, rt_dest->rt_dest));
1085
1086         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1087                 rt_gate = gr->gr_route;
1088                 if (rt_gate == NULL) {
1089                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1090                                 rt_dest->rt_dest,
1091                                 "mesh gate with no path %s",
1092                                 ether_sprintf(gr->gr_addr));
1093                         continue;
1094                 }
1095                 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1096                         continue;
1097                 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1098                     ("route not marked as a mesh gate"));
1099                 KASSERT((rt_gate->rt_flags &
1100                         IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1101                         ("found mesh gate that is also marked porxy"));
1102                 /*
1103                  * convert route to a proxy route gated by the current
1104                  * mesh gate, this is needed so encap can built data
1105                  * frame with correct address.
1106                  */
1107                 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1108                         IEEE80211_MESHRT_FLAGS_VALID;
1109                 rt_dest->rt_ext_seq = 1; /* random value */
1110                 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1111                 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1112                 rt_dest->rt_metric = rt_gate->rt_metric;
1113                 rt_dest->rt_nhops = rt_gate->rt_nhops;
1114                 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1115                 MESH_RT_UNLOCK(ms);
1116                 /* XXX: lock?? */
1117                 mcopy = m_dup(m, M_NOWAIT);
1118                 for (; mcopy != NULL; mcopy = next) {
1119                         next = mcopy->m_nextpkt;
1120                         mcopy->m_nextpkt = NULL;
1121                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1122                             rt_dest->rt_dest,
1123                             "flush queued frame %p len %d", mcopy,
1124                             mcopy->m_pkthdr.len);
1125                         mesh_transmit_to_gate(vap, mcopy, rt_gate);
1126                 }
1127                 MESH_RT_LOCK(ms);
1128         }
1129         rt_dest->rt_flags = 0; /* Mark invalid */
1130         m_freem(m);
1131         MESH_RT_UNLOCK(ms);
1132 }
1133
1134 /*
1135  * Forward the specified frame.
1136  * Decrement the TTL and set TA to our MAC address.
1137  */
1138 static void
1139 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1140     const struct ieee80211_meshcntl *mc)
1141 {
1142         struct ieee80211com *ic = vap->iv_ic;
1143         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1144         struct ifnet *ifp = vap->iv_ifp;
1145         const struct ieee80211_frame *wh =
1146             mtod(m, const struct ieee80211_frame *);
1147         struct mbuf *mcopy;
1148         struct ieee80211_meshcntl *mccopy;
1149         struct ieee80211_frame *whcopy;
1150         struct ieee80211_node *ni;
1151         int err;
1152
1153         /* This is called from the RX path - don't hold this lock */
1154         IEEE80211_TX_UNLOCK_ASSERT(ic);
1155
1156         /*
1157          * mesh ttl of 1 means we are the last one receving it,
1158          * according to amendment we decrement and then check if
1159          * 0, if so we dont forward.
1160          */
1161         if (mc->mc_ttl < 1) {
1162                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1163                     "%s", "frame not fwd'd, ttl 1");
1164                 vap->iv_stats.is_mesh_fwd_ttl++;
1165                 return;
1166         }
1167         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1168                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1169                     "%s", "frame not fwd'd, fwding disabled");
1170                 vap->iv_stats.is_mesh_fwd_disabled++;
1171                 return;
1172         }
1173         mcopy = m_dup(m, M_NOWAIT);
1174         if (mcopy == NULL) {
1175                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1176                     "%s", "frame not fwd'd, cannot dup");
1177                 vap->iv_stats.is_mesh_fwd_nobuf++;
1178                 IFNET_STAT_INC(ifp, oerrors, 1);
1179                 return;
1180         }
1181         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1182             sizeof(struct ieee80211_meshcntl));
1183         if (mcopy == NULL) {
1184                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1185                     "%s", "frame not fwd'd, too short");
1186                 vap->iv_stats.is_mesh_fwd_tooshort++;
1187                 IFNET_STAT_INC(ifp, oerrors, 1);
1188                 m_freem(mcopy);
1189                 return;
1190         }
1191         whcopy = mtod(mcopy, struct ieee80211_frame *);
1192         mccopy = (struct ieee80211_meshcntl *)
1193             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1194         /* XXX clear other bits? */
1195         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1196         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1197         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1198                 ni = ieee80211_ref_node(vap->iv_bss);
1199                 mcopy->m_flags |= M_MCAST;
1200         } else {
1201                 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1202                 if (ni == NULL) {
1203                         /*
1204                          * [Optional] any of the following three actions:
1205                          * o silently discard
1206                          * o trigger a path discovery
1207                          * o inform TA that meshDA is unknown.
1208                          */
1209                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1210                             "%s", "frame not fwd'd, no path");
1211                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1212                             IEEE80211_REASON_MESH_PERR_NO_FI);
1213                         vap->iv_stats.is_mesh_fwd_nopath++;
1214                         m_freem(mcopy);
1215                         return;
1216                 }
1217                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1218         }
1219         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1220         mccopy->mc_ttl--;
1221
1222         /* XXX calculate priority so drivers can find the tx queue */
1223         M_WME_SETAC(mcopy, WME_AC_BE);
1224
1225         /* XXX do we know m_nextpkt is NULL? */
1226         mcopy->m_pkthdr.rcvif = (void *) ni;
1227
1228         /*
1229          * XXX this bypasses all of the VAP TX handling; it passes frames
1230          * directly to the parent interface.
1231          *
1232          * Because of this, there's no TX lock being held as there's no
1233          * encaps state being used.
1234          *
1235          * Doing a direct parent transmit may not be the correct thing
1236          * to do here; we'll have to re-think this soon.
1237          */
1238         IEEE80211_TX_LOCK(ic);
1239         err = ieee80211_parent_xmitpkt(ic, mcopy);
1240         IEEE80211_TX_UNLOCK(ic);
1241         if (err != 0) {
1242                 /* NB: IFQ_HANDOFF reclaims mbuf */
1243                 ieee80211_free_node(ni);
1244         } else {
1245                 IFNET_STAT_INC(ifp, opackets, 1);
1246         }
1247 }
1248
1249 static struct mbuf *
1250 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1251 {
1252 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1253 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1254         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1255                   sizeof(struct ieee80211_meshcntl_ae10)];
1256         const struct ieee80211_qosframe_addr4 *wh;
1257         const struct ieee80211_meshcntl_ae10 *mc;
1258         struct ether_header *eh;
1259         struct llc *llc;
1260         int ae;
1261
1262         if (m->m_len < hdrlen + sizeof(*llc) &&
1263             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1264                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1265                     "discard data frame: %s", "m_pullup failed");
1266                 vap->iv_stats.is_rx_tooshort++;
1267                 return NULL;
1268         }
1269         memcpy(b, mtod(m, caddr_t), hdrlen);
1270         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1271         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1272         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1273                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1274             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1275
1276         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1277         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1278             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1279             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1280             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1281             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1282               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1283                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1284                 llc = NULL;
1285         } else {
1286                 m_adj(m, hdrlen - sizeof(*eh));
1287         }
1288         eh = mtod(m, struct ether_header *);
1289         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1290         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1291                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1292                 if (ae == IEEE80211_MESH_AE_00) {
1293                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1294                 } else if (ae == IEEE80211_MESH_AE_01) {
1295                         IEEE80211_ADDR_COPY(eh->ether_shost,
1296                             MC01(mc)->mc_addr4);
1297                 } else {
1298                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1299                             (const struct ieee80211_frame *)wh, NULL,
1300                             "bad AE %d", ae);
1301                         vap->iv_stats.is_mesh_badae++;
1302                         m_freem(m);
1303                         return NULL;
1304                 }
1305         } else {
1306                 if (ae == IEEE80211_MESH_AE_00) {
1307                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1308                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1309                 } else if (ae == IEEE80211_MESH_AE_10) {
1310                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1311                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1312                 } else {
1313                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1314                             (const struct ieee80211_frame *)wh, NULL,
1315                             "bad AE %d", ae);
1316                         vap->iv_stats.is_mesh_badae++;
1317                         m_freem(m);
1318                         return NULL;
1319                 }
1320         }
1321 #ifndef __NO_STRICT_ALIGNMENT
1322         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1323                 m = ieee80211_realign(vap, m, sizeof(*eh));
1324                 if (m == NULL)
1325                         return NULL;
1326         }
1327 #endif /* !__NO_STRICT_ALIGNMENT */
1328         if (llc != NULL) {
1329                 eh = mtod(m, struct ether_header *);
1330                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1331         }
1332         return m;
1333 #undef  WDIR
1334 #undef  MC01
1335 }
1336
1337 /*
1338  * Return non-zero if the unicast mesh data frame should be processed
1339  * locally.  Frames that are not proxy'd have our address, otherwise
1340  * we need to consult the routing table to look for a proxy entry.
1341  */
1342 static __inline int
1343 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1344     const struct ieee80211_meshcntl *mc)
1345 {
1346         int ae = mc->mc_flags & 3;
1347
1348         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1349             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1350         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1351             ("bad AE %d", ae));
1352         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
1353                 const struct ieee80211_meshcntl_ae10 *mc10 =
1354                     (const struct ieee80211_meshcntl_ae10 *) mc;
1355                 struct ieee80211_mesh_route *rt =
1356                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1357                 /* check for proxy route to ourself */
1358                 return (rt != NULL &&
1359                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1360         } else                                  /* ucast w/o proxy */
1361                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1362 }
1363
1364 /*
1365  * Verifies transmitter, updates lifetime, precursor list and forwards data.
1366  * > 0 means we have forwarded data and no need to process locally
1367  * == 0 means we want to process locally (and we may have forwarded data
1368  * < 0 means there was an error and data should be discarded
1369  */
1370 static int
1371 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1372     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1373 {
1374         struct ieee80211_qosframe_addr4 *qwh;
1375         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1376         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1377
1378         /* This is called from the RX path - don't hold this lock */
1379         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1380
1381         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1382
1383         /*
1384          * TODO:
1385          * o verify addr2 is  a legitimate transmitter
1386          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1387          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1388          */
1389
1390         /* set lifetime of addr3 (meshDA) to initial value */
1391         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1392         if (rt_meshda == NULL) {
1393                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1394                     "no route to meshDA(%s)", ether_sprintf(qwh->i_addr3));
1395                 /*
1396                  * [Optional] any of the following three actions:
1397                  * o silently discard                           [X]
1398                  * o trigger a path discovery                   [ ]
1399                  * o inform TA that meshDA is unknown.          [ ]
1400                  */
1401                 /* XXX: stats */
1402                 return (-1);
1403         }
1404
1405         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1406             ms->ms_ppath->mpp_inact));
1407
1408         /* set lifetime of addr4 (meshSA) to initial value */
1409         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1410         KASSERT(rt_meshsa != NULL, ("no route"));
1411         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1412             ms->ms_ppath->mpp_inact));
1413
1414         mesh_forward(vap, m, mc);
1415         return (1); /* dont process locally */
1416 }
1417
1418 /*
1419  * Verifies transmitter, updates lifetime, precursor list and process data
1420  * locally, if data is proxy with AE = 10 it could mean data should go
1421  * on another mesh path or data should be forwarded to the DS.
1422  *
1423  * > 0 means we have forwarded data and no need to process locally
1424  * == 0 means we want to process locally (and we may have forwarded data
1425  * < 0 means there was an error and data should be discarded
1426  */
1427 static int
1428 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1429     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1430 {
1431         struct ieee80211_qosframe_addr4 *qwh;
1432         const struct ieee80211_meshcntl_ae10 *mc10;
1433         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1434         struct ieee80211_mesh_route *rt;
1435         int ae;
1436
1437         /* This is called from the RX path - don't hold this lock */
1438         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1439
1440         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1441         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1442
1443         /*
1444          * TODO:
1445          * o verify addr2 is  a legitimate transmitter
1446          * o lifetime of precursor entry is max(init, curr)
1447          */
1448
1449         /* set lifetime of addr4 (meshSA) to initial value */
1450         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1451         KASSERT(rt != NULL, ("no route"));
1452         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1453         rt = NULL;
1454
1455         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1456         KASSERT(ae == IEEE80211_MESH_AE_00 ||
1457             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1458         if (ae == IEEE80211_MESH_AE_10) {
1459                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1460                         return (0); /* process locally */
1461                 }
1462
1463                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1464                 if (rt != NULL &&
1465                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1466                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1467                         /*
1468                          * Forward on another mesh-path, according to
1469                          * amendment as specified in 9.32.4.1
1470                          */
1471                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1472                         mesh_forward(vap, m,
1473                             (const struct ieee80211_meshcntl *)mc10);
1474                         return (1); /* dont process locally */
1475                 }
1476                 /*
1477                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
1478                  * addressed according to 13.11.3.2.
1479                  */
1480                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1481                     "forward frame to DS, SA(%s) DA(%s)",
1482                     ether_sprintf(mc10->mc_addr6),
1483                     ether_sprintf(mc10->mc_addr5));
1484         }
1485         return (0); /* process locally */
1486 }
1487
1488 /*
1489  * Try to forward the group addressed data on to other mesh STAs, and
1490  * also to the DS.
1491  *
1492  * > 0 means we have forwarded data and no need to process locally
1493  * == 0 means we want to process locally (and we may have forwarded data
1494  * < 0 means there was an error and data should be discarded
1495  */
1496 static int
1497 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1498     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1499 {
1500 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1501         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1502
1503         /* This is called from the RX path - don't hold this lock */
1504         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1505
1506         mesh_forward(vap, m, mc);
1507
1508         if(mc->mc_ttl > 0) {
1509                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1510                         /*
1511                          * Forward of MSDUs from the MBSS to DS group addressed
1512                          * (according to 13.11.3.2)
1513                          * This happens by delivering the packet, and a bridge
1514                          * will sent it on another port member.
1515                          */
1516                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1517                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
1518                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1519                                     MC01(mc)->mc_addr4, "%s",
1520                                     "forward from MBSS to the DS");
1521                 }
1522         }
1523         return (0); /* process locally */
1524 #undef  MC01
1525 }
1526
1527 static int
1528 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
1529 {
1530 #define HAS_SEQ(type)   ((type & 0x4) == 0)
1531 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1532 #define MC10(mc)        ((const struct ieee80211_meshcntl_ae10 *)mc)
1533         struct ieee80211vap *vap = ni->ni_vap;
1534         struct ieee80211com *ic = ni->ni_ic;
1535         struct ifnet *ifp = vap->iv_ifp;
1536         struct ieee80211_frame *wh;
1537         const struct ieee80211_meshcntl *mc;
1538         int hdrspace, meshdrlen, need_tap, error;
1539         uint8_t dir, type, subtype, ae;
1540         uint32_t seq;
1541         const uint8_t *addr;
1542         uint8_t qos[2];
1543         ieee80211_seq rxseq;
1544
1545         KASSERT(ni != NULL, ("null node"));
1546         ni->ni_inact = ni->ni_inact_reload;
1547
1548         need_tap = 1;                   /* mbuf need to be tapped. */
1549         type = -1;                      /* undefined */
1550
1551         /* This is called from the RX path - don't hold this lock */
1552         IEEE80211_TX_UNLOCK_ASSERT(ic);
1553
1554         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1555                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1556                     ni->ni_macaddr, NULL,
1557                     "too short (1): len %u", m->m_pkthdr.len);
1558                 vap->iv_stats.is_rx_tooshort++;
1559                 goto out;
1560         }
1561         /*
1562          * Bit of a cheat here, we use a pointer for a 3-address
1563          * frame format but don't reference fields past outside
1564          * ieee80211_frame_min w/o first validating the data is
1565          * present.
1566         */
1567         wh = mtod(m, struct ieee80211_frame *);
1568
1569         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1570             IEEE80211_FC0_VERSION_0) {
1571                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1572                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1573                 vap->iv_stats.is_rx_badversion++;
1574                 goto err;
1575         }
1576         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1577         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1578         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1579         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1580                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1581                 ni->ni_noise = nf;
1582                 if (HAS_SEQ(type)) {
1583                         uint8_t tid = ieee80211_gettid(wh);
1584
1585                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
1586                             TID_TO_WME_AC(tid) >= WME_AC_VI)
1587                                 ic->ic_wme.wme_hipri_traffic++;
1588                         rxseq = le16toh(*(uint16_t *)wh->i_seq);
1589                         if (! ieee80211_check_rxseq(ni, wh)) {
1590                                 /* duplicate, discard */
1591                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1592                                     wh->i_addr1, "duplicate",
1593                                     "seqno <%u,%u> fragno <%u,%u> tid %u",
1594                                     rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
1595                                     ni->ni_rxseqs[tid] >>
1596                                     IEEE80211_SEQ_SEQ_SHIFT,
1597                                     rxseq & IEEE80211_SEQ_FRAG_MASK,
1598                                     ni->ni_rxseqs[tid] &
1599                                     IEEE80211_SEQ_FRAG_MASK,
1600                                     tid);
1601                                 vap->iv_stats.is_rx_dup++;
1602                                 IEEE80211_NODE_STAT(ni, rx_dup);
1603                                 goto out;
1604                         }
1605                         ni->ni_rxseqs[tid] = rxseq;
1606                 }
1607         }
1608 #ifdef IEEE80211_DEBUG
1609         /*
1610          * It's easier, but too expensive, to simulate different mesh
1611          * topologies by consulting the ACL policy very early, so do this
1612          * only under DEBUG.
1613          *
1614          * NB: this check is also done upon peering link initiation.
1615          */
1616         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1617                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1618                     wh, NULL, "%s", "disallowed by ACL");
1619                 vap->iv_stats.is_rx_acl++;
1620                 goto out;
1621         }
1622 #endif
1623         switch (type) {
1624         case IEEE80211_FC0_TYPE_DATA:
1625                 if (ni == vap->iv_bss)
1626                         goto out;
1627                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1628                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1629                             ni->ni_macaddr, NULL,
1630                             "peer link not yet established (%d)",
1631                             ni->ni_mlstate);
1632                         vap->iv_stats.is_mesh_nolink++;
1633                         goto out;
1634                 }
1635                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1636                     dir != IEEE80211_FC1_DIR_DSTODS) {
1637                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1638                             wh, "data", "incorrect dir 0x%x", dir);
1639                         vap->iv_stats.is_rx_wrongdir++;
1640                         goto err;
1641                 }
1642
1643                 /* All Mesh data frames are QoS subtype */
1644                 if (!HAS_SEQ(type)) {
1645                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1646                             wh, "data", "incorrect subtype 0x%x", subtype);
1647                         vap->iv_stats.is_rx_badsubtype++;
1648                         goto err;
1649                 }
1650
1651                 /*
1652                  * Next up, any fragmentation.
1653                  * XXX: we defrag before we even try to forward,
1654                  * Mesh Control field is not present in sub-sequent
1655                  * fragmented frames. This is in contrast to Draft 4.0.
1656                  */
1657                 hdrspace = ieee80211_hdrspace(ic, wh);
1658                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1659                         m = ieee80211_defrag(ni, m, hdrspace);
1660                         if (m == NULL) {
1661                                 /* Fragment dropped or frame not complete yet */
1662                                 goto out;
1663                         }
1664                 }
1665                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1666
1667                 /*
1668                  * Now we have a complete Mesh Data frame.
1669                  */
1670
1671                 /*
1672                  * Only fromDStoDS data frames use 4 address qos frames
1673                  * as specified in amendment. Otherwise addr4 is located
1674                  * in the Mesh Control field and a 3 address qos frame
1675                  * is used.
1676                  */
1677                 if (IEEE80211_IS_DSTODS(wh))
1678                         *(uint16_t *)qos = *(uint16_t *)
1679                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos;
1680                 else
1681                         *(uint16_t *)qos = *(uint16_t *)
1682                             ((struct ieee80211_qosframe *)wh)->i_qos;
1683
1684                 /*
1685                  * NB: The mesh STA sets the Mesh Control Present
1686                  * subfield to 1 in the Mesh Data frame containing
1687                  * an unfragmented MSDU, an A-MSDU, or the first
1688                  * fragment of an MSDU.
1689                  * After defrag it should always be present.
1690                  */
1691                 if (!(qos[1] & IEEE80211_QOS_MC)) {
1692                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1693                             ni->ni_macaddr, NULL,
1694                             "%s", "Mesh control field not present");
1695                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1696                         goto err;
1697                 }
1698
1699                 /* pull up enough to get to the mesh control */
1700                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1701                     (m = m_pullup(m, hdrspace +
1702                         sizeof(struct ieee80211_meshcntl))) == NULL) {
1703                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1704                             ni->ni_macaddr, NULL,
1705                             "data too short: expecting %u", hdrspace);
1706                         vap->iv_stats.is_rx_tooshort++;
1707                         goto out;               /* XXX */
1708                 }
1709                 /*
1710                  * Now calculate the full extent of the headers. Note
1711                  * mesh_decap will pull up anything we didn't get
1712                  * above when it strips the 802.11 headers.
1713                  */
1714                 mc = (const struct ieee80211_meshcntl *)
1715                     (mtod(m, const uint8_t *) + hdrspace);
1716                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1717                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1718                     ae * IEEE80211_ADDR_LEN;
1719                 hdrspace += meshdrlen;
1720
1721                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1722                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1723                     (m->m_len < hdrspace) &&
1724                     ((m = m_pullup(m, hdrspace)) == NULL)) {
1725                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1726                             ni->ni_macaddr, NULL,
1727                             "data too short: expecting %u", hdrspace);
1728                         vap->iv_stats.is_rx_tooshort++;
1729                         goto out;               /* XXX */
1730                 }
1731                 /* XXX: are we sure there is no reallocating after m_pullup? */
1732
1733                 seq = LE_READ_4(mc->mc_seq);
1734                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1735                         addr = wh->i_addr3;
1736                 else if (ae == IEEE80211_MESH_AE_01)
1737                         addr = MC01(mc)->mc_addr4;
1738                 else
1739                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1740                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1741                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1742                             addr, "data", "%s", "not to me");
1743                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1744                         goto out;
1745                 }
1746                 if (mesh_checkpseq(vap, addr, seq) != 0) {
1747                         vap->iv_stats.is_rx_dup++;
1748                         goto out;
1749                 }
1750
1751                 /* This code "routes" the frame to the right control path */
1752                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1753                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1754                                 error =
1755                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1756                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1757                                 error = mesh_recv_group_data(vap, m, wh, mc);
1758                         else
1759                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1760                                     wh, mc);
1761                 } else
1762                         error = mesh_recv_group_data(vap, m, wh, mc);
1763                 if (error < 0)
1764                         goto err;
1765                 else if (error > 0)
1766                         goto out;
1767
1768                 if (ieee80211_radiotap_active_vap(vap))
1769                         ieee80211_radiotap_rx(vap, m);
1770                 need_tap = 0;
1771
1772                 /*
1773                  * Finally, strip the 802.11 header.
1774                  */
1775                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1776                 if (m == NULL) {
1777                         /* XXX mask bit to check for both */
1778                         /* don't count Null data frames as errors */
1779                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1780                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1781                                 goto out;
1782                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1783                             ni->ni_macaddr, "data", "%s", "decap error");
1784                         vap->iv_stats.is_rx_decap++;
1785                         IEEE80211_NODE_STAT(ni, rx_decap);
1786                         goto err;
1787                 }
1788                 if (qos[0] & IEEE80211_QOS_AMSDU) {
1789                         m = ieee80211_decap_amsdu(ni, m);
1790                         if (m == NULL)
1791                                 return IEEE80211_FC0_TYPE_DATA;
1792                 }
1793                 ieee80211_deliver_data(vap, ni, m);
1794                 return type;
1795         case IEEE80211_FC0_TYPE_MGT:
1796                 vap->iv_stats.is_rx_mgmt++;
1797                 IEEE80211_NODE_STAT(ni, rx_mgmt);
1798                 if (dir != IEEE80211_FC1_DIR_NODS) {
1799                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1800                             wh, "mgt", "incorrect dir 0x%x", dir);
1801                         vap->iv_stats.is_rx_wrongdir++;
1802                         goto err;
1803                 }
1804                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1805                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1806                             ni->ni_macaddr, "mgt", "too short: len %u",
1807                             m->m_pkthdr.len);
1808                         vap->iv_stats.is_rx_tooshort++;
1809                         goto out;
1810                 }
1811 #ifdef IEEE80211_DEBUG
1812                 if ((ieee80211_msg_debug(vap) &&
1813                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1814                     ieee80211_msg_dumppkts(vap)) {
1815                         if_printf(ifp, "received %s from %s rssi %d\n",
1816                             ieee80211_mgt_subtype_name[subtype >>
1817                             IEEE80211_FC0_SUBTYPE_SHIFT],
1818                             ether_sprintf(wh->i_addr2), rssi);
1819                 }
1820 #endif
1821                 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1822                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1823                             wh, NULL, "%s", "WEP set but not permitted");
1824                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1825                         goto out;
1826                 }
1827                 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
1828                 goto out;
1829         case IEEE80211_FC0_TYPE_CTL:
1830                 vap->iv_stats.is_rx_ctl++;
1831                 IEEE80211_NODE_STAT(ni, rx_ctrl);
1832                 goto out;
1833         default:
1834                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1835                     wh, "bad", "frame type 0x%x", type);
1836                 /* should not come here */
1837                 break;
1838         }
1839 err:
1840         IFNET_STAT_INC(ifp, ierrors, 1);
1841 out:
1842         if (m != NULL) {
1843                 if (need_tap && ieee80211_radiotap_active_vap(vap))
1844                         ieee80211_radiotap_rx(vap, m);
1845                 m_freem(m);
1846         }
1847         return type;
1848 #undef  HAS_SEQ
1849 #undef  MC01
1850 #undef  MC10
1851 }
1852
1853 static void
1854 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1855     int rssi, int nf)
1856 {
1857         struct ieee80211vap *vap = ni->ni_vap;
1858         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1859         struct ieee80211com *ic = ni->ni_ic;
1860         struct ieee80211_frame *wh;
1861         struct ieee80211_mesh_route *rt;
1862         uint8_t *frm, *efrm;
1863
1864         wh = mtod(m0, struct ieee80211_frame *);
1865         frm = (uint8_t *)&wh[1];
1866         efrm = mtod(m0, uint8_t *) + m0->m_len;
1867         switch (subtype) {
1868         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1869         case IEEE80211_FC0_SUBTYPE_BEACON:
1870         {
1871                 struct ieee80211_scanparams scan;
1872                 /*
1873                  * We process beacon/probe response
1874                  * frames to discover neighbors.
1875                  */
1876                 if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
1877                         return;
1878                 /*
1879                  * Count frame now that we know it's to be processed.
1880                  */
1881                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1882                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
1883                         IEEE80211_NODE_STAT(ni, rx_beacons);
1884                 } else
1885                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1886                 /*
1887                  * If scanning, just pass information to the scan module.
1888                  */
1889                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1890                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1891                                 /*
1892                                  * Actively scanning a channel marked passive;
1893                                  * send a probe request now that we know there
1894                                  * is 802.11 traffic present.
1895                                  *
1896                                  * XXX check if the beacon we recv'd gives
1897                                  * us what we need and suppress the probe req
1898                                  */
1899                                 ieee80211_probe_curchan(vap, 1);
1900                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1901                         }
1902                         ieee80211_add_scan(vap, &scan, wh,
1903                             subtype, rssi, nf);
1904                         return;
1905                 }
1906
1907                 /* The rest of this code assumes we are running */
1908                 if (vap->iv_state != IEEE80211_S_RUN)
1909                         return;
1910                 /*
1911                  * Ignore non-mesh STAs.
1912                  */
1913                 if ((scan.capinfo &
1914                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1915                     scan.meshid == NULL || scan.meshconf == NULL) {
1916                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1917                             wh, "beacon", "%s", "not a mesh sta");
1918                         vap->iv_stats.is_mesh_wrongmesh++;
1919                         return;
1920                 }
1921                 /*
1922                  * Ignore STAs for other mesh networks.
1923                  */
1924                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1925                     mesh_verify_meshconf(vap, scan.meshconf)) {
1926                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1927                             wh, "beacon", "%s", "not for our mesh");
1928                         vap->iv_stats.is_mesh_wrongmesh++;
1929                         return;
1930                 }
1931                 /*
1932                  * Peer only based on the current ACL policy.
1933                  */
1934                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1935                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1936                             wh, NULL, "%s", "disallowed by ACL");
1937                         vap->iv_stats.is_rx_acl++;
1938                         return;
1939                 }
1940                 /*
1941                  * Do neighbor discovery.
1942                  */
1943                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1944                         /*
1945                          * Create a new entry in the neighbor table.
1946                          */
1947                         ni = ieee80211_add_neighbor(vap, wh, &scan);
1948                 }
1949                 /*
1950                  * Automatically peer with discovered nodes if possible.
1951                  */
1952                 if (ni != vap->iv_bss &&
1953                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1954                         switch (ni->ni_mlstate) {
1955                         case IEEE80211_NODE_MESH_IDLE:
1956                         {
1957                                 uint16_t args[1];
1958
1959                                 /* Wait for backoff callout to reset counter */
1960                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1961                                         return;
1962
1963                                 ni->ni_mlpid = mesh_generateid(vap);
1964                                 if (ni->ni_mlpid == 0)
1965                                         return;
1966                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1967                                 args[0] = ni->ni_mlpid;
1968                                 ieee80211_send_action(ni,
1969                                 IEEE80211_ACTION_CAT_SELF_PROT,
1970                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1971                                 ni->ni_mlrcnt = 0;
1972                                 mesh_peer_timeout_setup(ni);
1973                                 break;
1974                         }
1975                         case IEEE80211_NODE_MESH_ESTABLISHED:
1976                         {
1977                                 /*
1978                                  * Valid beacon from a peer mesh STA
1979                                  * bump TA lifetime
1980                                  */
1981                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1982                                 if(rt != NULL) {
1983                                         ieee80211_mesh_rt_update(rt,
1984                                             ticks_to_msecs(
1985                                             ms->ms_ppath->mpp_inact));
1986                                 }
1987                                 break;
1988                         }
1989                         default:
1990                                 break; /* ignore */
1991                         }
1992                 }
1993                 break;
1994         }
1995         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1996         {
1997                 uint8_t *ssid, *meshid, *rates, *xrates;
1998                 uint8_t *sfrm;
1999
2000                 if (vap->iv_state != IEEE80211_S_RUN) {
2001                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2002                             wh, NULL, "wrong state %s",
2003                             ieee80211_state_name[vap->iv_state]);
2004                         vap->iv_stats.is_rx_mgtdiscard++;
2005                         return;
2006                 }
2007                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
2008                         /* frame must be directed */
2009                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2010                             wh, NULL, "%s", "not unicast");
2011                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
2012                         return;
2013                 }
2014                 /*
2015                  * prreq frame format
2016                  *      [tlv] ssid
2017                  *      [tlv] supported rates
2018                  *      [tlv] extended supported rates
2019                  *      [tlv] mesh id
2020                  */
2021                 ssid = meshid = rates = xrates = NULL;
2022                 sfrm = frm;
2023                 while (efrm - frm > 1) {
2024                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2025                         switch (*frm) {
2026                         case IEEE80211_ELEMID_SSID:
2027                                 ssid = frm;
2028                                 break;
2029                         case IEEE80211_ELEMID_RATES:
2030                                 rates = frm;
2031                                 break;
2032                         case IEEE80211_ELEMID_XRATES:
2033                                 xrates = frm;
2034                                 break;
2035                         case IEEE80211_ELEMID_MESHID:
2036                                 meshid = frm;
2037                                 break;
2038                         }
2039                         frm += frm[1] + 2;
2040                 }
2041                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2042                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2043                 if (xrates != NULL)
2044                         IEEE80211_VERIFY_ELEMENT(xrates,
2045                             IEEE80211_RATE_MAXSIZE - rates[1], return);
2046                 if (meshid != NULL) {
2047                         IEEE80211_VERIFY_ELEMENT(meshid,
2048                             IEEE80211_MESHID_LEN, return);
2049                         /* NB: meshid, not ssid */
2050                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2051                 }
2052
2053                 /* XXX find a better class or define it's own */
2054                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2055                     "%s", "recv probe req");
2056                 /*
2057                  * Some legacy 11b clients cannot hack a complete
2058                  * probe response frame.  When the request includes
2059                  * only a bare-bones rate set, communicate this to
2060                  * the transmit side.
2061                  */
2062                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2063                 break;
2064         }
2065
2066         case IEEE80211_FC0_SUBTYPE_ACTION:
2067         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2068                 if (ni == vap->iv_bss) {
2069                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2070                             wh, NULL, "%s", "unknown node");
2071                         vap->iv_stats.is_rx_mgtdiscard++;
2072                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2073                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2074                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2075                             wh, NULL, "%s", "not for us");
2076                         vap->iv_stats.is_rx_mgtdiscard++;
2077                 } else if (vap->iv_state != IEEE80211_S_RUN) {
2078                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2079                             wh, NULL, "wrong state %s",
2080                             ieee80211_state_name[vap->iv_state]);
2081                         vap->iv_stats.is_rx_mgtdiscard++;
2082                 } else {
2083                         if (ieee80211_parse_action(ni, m0) == 0)
2084                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2085                 }
2086                 break;
2087
2088         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2089         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2090         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2091         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2092         case IEEE80211_FC0_SUBTYPE_ATIM:
2093         case IEEE80211_FC0_SUBTYPE_DISASSOC:
2094         case IEEE80211_FC0_SUBTYPE_AUTH:
2095         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2096                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2097                     wh, NULL, "%s", "not handled");
2098                 vap->iv_stats.is_rx_mgtdiscard++;
2099                 break;
2100
2101         default:
2102                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2103                     wh, "mgt", "subtype 0x%x not handled", subtype);
2104                 vap->iv_stats.is_rx_badsubtype++;
2105                 break;
2106         }
2107 }
2108
2109 static void
2110 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2111 {
2112
2113         switch (subtype) {
2114         case IEEE80211_FC0_SUBTYPE_BAR:
2115                 ieee80211_recv_bar(ni, m);
2116                 break;
2117         }
2118 }
2119
2120 /*
2121  * Parse meshpeering action ie's for MPM frames
2122  */
2123 static const struct ieee80211_meshpeer_ie *
2124 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2125         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
2126         const uint8_t *frm, const uint8_t *efrm,
2127         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2128 {
2129         struct ieee80211vap *vap = ni->ni_vap;
2130         const struct ieee80211_meshpeer_ie *mpie;
2131         uint16_t args[3];
2132         const uint8_t *meshid, *meshconf, *meshpeer;
2133         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2134
2135         meshid = meshconf = meshpeer = NULL;
2136         while (efrm - frm > 1) {
2137                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2138                 switch (*frm) {
2139                 case IEEE80211_ELEMID_MESHID:
2140                         meshid = frm;
2141                         break;
2142                 case IEEE80211_ELEMID_MESHCONF:
2143                         meshconf = frm;
2144                         break;
2145                 case IEEE80211_ELEMID_MESHPEER:
2146                         meshpeer = frm;
2147                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
2148                         memset(mp, 0, sizeof(*mp));
2149                         mp->peer_len = mpie->peer_len;
2150                         mp->peer_proto = LE_READ_2(&mpie->peer_proto);
2151                         mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid);
2152                         switch (subtype) {
2153                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2154                                 mp->peer_linkid =
2155                                     LE_READ_2(&mpie->peer_linkid);
2156                                 break;
2157                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
2158                                 /* NB: peer link ID is optional */
2159                                 if (mpie->peer_len ==
2160                                     (IEEE80211_MPM_BASE_SZ + 2)) {
2161                                         mp->peer_linkid = 0;
2162                                         mp->peer_rcode =
2163                                             LE_READ_2(&mpie->peer_linkid);
2164                                 } else {
2165                                         mp->peer_linkid =
2166                                             LE_READ_2(&mpie->peer_linkid);
2167                                         mp->peer_rcode =
2168                                             LE_READ_2(&mpie->peer_rcode);
2169                                 }
2170                                 break;
2171                         }
2172                         break;
2173                 }
2174                 frm += frm[1] + 2;
2175         }
2176
2177         /*
2178          * Verify the contents of the frame.
2179          * If it fails validation, close the peer link.
2180          */
2181         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2182                 sendclose = 1;
2183                 IEEE80211_DISCARD(vap,
2184                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2185                     wh, NULL, "%s", "MPM validation failed");
2186         }
2187
2188         /* If meshid is not the same reject any frames type. */
2189         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2190                 sendclose = 1;
2191                 IEEE80211_DISCARD(vap,
2192                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2193                     wh, NULL, "%s", "not for our mesh");
2194                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2195                         /*
2196                          * Standard not clear about this, if we dont ignore
2197                          * there will be an endless loop between nodes sending
2198                          * CLOSE frames between each other with wrong meshid.
2199                          * Discard and timers will bring FSM to IDLE state.
2200                          */
2201                         return NULL;
2202                 }
2203         }
2204
2205         /*
2206          * Close frames are accepted if meshid is the same.
2207          * Verify the other two types.
2208          */
2209         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2210             mesh_verify_meshconf(vap, meshconf)) {
2211                 sendclose = 1;
2212                 IEEE80211_DISCARD(vap,
2213                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2214                     wh, NULL, "%s", "configuration missmatch");
2215         }
2216
2217         if (sendclose) {
2218                 vap->iv_stats.is_rx_mgtdiscard++;
2219                 switch (ni->ni_mlstate) {
2220                 case IEEE80211_NODE_MESH_IDLE:
2221                 case IEEE80211_NODE_MESH_ESTABLISHED:
2222                 case IEEE80211_NODE_MESH_HOLDING:
2223                         /* ignore */
2224                         break;
2225                 case IEEE80211_NODE_MESH_OPENSNT:
2226                 case IEEE80211_NODE_MESH_OPENRCV:
2227                 case IEEE80211_NODE_MESH_CONFIRMRCV:
2228                         args[0] = ni->ni_mlpid;
2229                         args[1] = ni->ni_mllid;
2230                         /* Reason codes for rejection */
2231                         switch (subtype) {
2232                         case IEEE80211_ACTION_MESHPEERING_OPEN:
2233                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2234                                 break;
2235                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2236                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2237                                 break;
2238                         }
2239                         ieee80211_send_action(ni,
2240                             IEEE80211_ACTION_CAT_SELF_PROT,
2241                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2242                             args);
2243                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2244                         mesh_peer_timeout_setup(ni);
2245                         break;
2246                 }
2247                 return NULL;
2248         }
2249
2250         return (const struct ieee80211_meshpeer_ie *) mp;
2251 }
2252
2253 static int
2254 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2255         const struct ieee80211_frame *wh,
2256         const uint8_t *frm, const uint8_t *efrm)
2257 {
2258         struct ieee80211vap *vap = ni->ni_vap;
2259         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2260         struct ieee80211_meshpeer_ie ie;
2261         const struct ieee80211_meshpeer_ie *meshpeer;
2262         uint16_t args[3];
2263
2264         /* +2+2 for action + code + capabilites */
2265         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2266             IEEE80211_ACTION_MESHPEERING_OPEN);
2267         if (meshpeer == NULL) {
2268                 return 0;
2269         }
2270
2271         /* XXX move up */
2272         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2273             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2274
2275         switch (ni->ni_mlstate) {
2276         case IEEE80211_NODE_MESH_IDLE:
2277                 /* Reject open request if reached our maximum neighbor count */
2278                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2279                         args[0] = meshpeer->peer_llinkid;
2280                         args[1] = 0;
2281                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2282                         ieee80211_send_action(ni,
2283                             IEEE80211_ACTION_CAT_SELF_PROT,
2284                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2285                             args);
2286                         /* stay in IDLE state */
2287                         return (0);
2288                 }
2289                 /* Open frame accepted */
2290                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2291                 ni->ni_mllid = meshpeer->peer_llinkid;
2292                 ni->ni_mlpid = mesh_generateid(vap);
2293                 if (ni->ni_mlpid == 0)
2294                         return 0;               /* XXX */
2295                 args[0] = ni->ni_mlpid;
2296                 /* Announce we're open too... */
2297                 ieee80211_send_action(ni,
2298                     IEEE80211_ACTION_CAT_SELF_PROT,
2299                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
2300                 /* ...and confirm the link. */
2301                 args[0] = ni->ni_mlpid;
2302                 args[1] = ni->ni_mllid;
2303                 ieee80211_send_action(ni,
2304                     IEEE80211_ACTION_CAT_SELF_PROT,
2305                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2306                     args);
2307                 mesh_peer_timeout_setup(ni);
2308                 break;
2309         case IEEE80211_NODE_MESH_OPENRCV:
2310                 /* Wrong Link ID */
2311                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2312                         args[0] = ni->ni_mllid;
2313                         args[1] = ni->ni_mlpid;
2314                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2315                         ieee80211_send_action(ni,
2316                             IEEE80211_ACTION_CAT_SELF_PROT,
2317                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2318                             args);
2319                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2320                         mesh_peer_timeout_setup(ni);
2321                         break;
2322                 }
2323                 /* Duplicate open, confirm again. */
2324                 args[0] = ni->ni_mlpid;
2325                 args[1] = ni->ni_mllid;
2326                 ieee80211_send_action(ni,
2327                     IEEE80211_ACTION_CAT_SELF_PROT,
2328                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2329                     args);
2330                 break;
2331         case IEEE80211_NODE_MESH_OPENSNT:
2332                 ni->ni_mllid = meshpeer->peer_llinkid;
2333                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
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                 /* NB: don't setup/clear any timeout */
2341                 break;
2342         case IEEE80211_NODE_MESH_CONFIRMRCV:
2343                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2344                     ni->ni_mllid != meshpeer->peer_llinkid) {
2345                         args[0] = ni->ni_mlpid;
2346                         args[1] = ni->ni_mllid;
2347                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2348                         ieee80211_send_action(ni,
2349                             IEEE80211_ACTION_CAT_SELF_PROT,
2350                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2351                             args);
2352                         mesh_linkchange(ni,
2353                             IEEE80211_NODE_MESH_HOLDING);
2354                         mesh_peer_timeout_setup(ni);
2355                         break;
2356                 }
2357                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2358                 ni->ni_mllid = meshpeer->peer_llinkid;
2359                 args[0] = ni->ni_mlpid;
2360                 args[1] = ni->ni_mllid;
2361                 ieee80211_send_action(ni,
2362                     IEEE80211_ACTION_CAT_SELF_PROT,
2363                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2364                     args);
2365                 mesh_peer_timeout_stop(ni);
2366                 break;
2367         case IEEE80211_NODE_MESH_ESTABLISHED:
2368                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2369                         args[0] = ni->ni_mllid;
2370                         args[1] = ni->ni_mlpid;
2371                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2372                         ieee80211_send_action(ni,
2373                             IEEE80211_ACTION_CAT_SELF_PROT,
2374                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2375                             args);
2376                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2377                         mesh_peer_timeout_setup(ni);
2378                         break;
2379                 }
2380                 args[0] = ni->ni_mlpid;
2381                 args[1] = ni->ni_mllid;
2382                 ieee80211_send_action(ni,
2383                     IEEE80211_ACTION_CAT_SELF_PROT,
2384                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2385                     args);
2386                 break;
2387         case IEEE80211_NODE_MESH_HOLDING:
2388                 args[0] = ni->ni_mlpid;
2389                 args[1] = meshpeer->peer_llinkid;
2390                 /* Standard not clear about what the reaason code should be */
2391                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2392                 ieee80211_send_action(ni,
2393                     IEEE80211_ACTION_CAT_SELF_PROT,
2394                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2395                     args);
2396                 break;
2397         }
2398         return 0;
2399 }
2400
2401 static int
2402 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2403         const struct ieee80211_frame *wh,
2404         const uint8_t *frm, const uint8_t *efrm)
2405 {
2406         struct ieee80211vap *vap = ni->ni_vap;
2407         struct ieee80211_meshpeer_ie ie;
2408         const struct ieee80211_meshpeer_ie *meshpeer;
2409         uint16_t args[3];
2410
2411         /* +2+2+2+2 for action + code + capabilites + status code + AID */
2412         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2413             IEEE80211_ACTION_MESHPEERING_CONFIRM);
2414         if (meshpeer == NULL) {
2415                 return 0;
2416         }
2417
2418         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2419             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2420             meshpeer->peer_llinkid, meshpeer->peer_linkid);
2421
2422         switch (ni->ni_mlstate) {
2423         case IEEE80211_NODE_MESH_OPENRCV:
2424                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2425                 mesh_peer_timeout_stop(ni);
2426                 break;
2427         case IEEE80211_NODE_MESH_OPENSNT:
2428                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2429                 mesh_peer_timeout_setup(ni);
2430                 break;
2431         case IEEE80211_NODE_MESH_HOLDING:
2432                 args[0] = ni->ni_mlpid;
2433                 args[1] = meshpeer->peer_llinkid;
2434                 /* Standard not clear about what the reaason code should be */
2435                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2436                 ieee80211_send_action(ni,
2437                     IEEE80211_ACTION_CAT_SELF_PROT,
2438                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2439                     args);
2440                 break;
2441         case IEEE80211_NODE_MESH_CONFIRMRCV:
2442                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2443                         args[0] = ni->ni_mlpid;
2444                         args[1] = ni->ni_mllid;
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                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2451                         mesh_peer_timeout_setup(ni);
2452                 }
2453                 break;
2454         default:
2455                 IEEE80211_DISCARD(vap,
2456                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2457                     wh, NULL, "received confirm in invalid state %d",
2458                     ni->ni_mlstate);
2459                 vap->iv_stats.is_rx_mgtdiscard++;
2460                 break;
2461         }
2462         return 0;
2463 }
2464
2465 static int
2466 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2467         const struct ieee80211_frame *wh,
2468         const uint8_t *frm, const uint8_t *efrm)
2469 {
2470         struct ieee80211_meshpeer_ie ie;
2471         const struct ieee80211_meshpeer_ie *meshpeer;
2472         uint16_t args[3];
2473
2474         /* +2 for action + code */
2475         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2476             IEEE80211_ACTION_MESHPEERING_CLOSE);
2477         if (meshpeer == NULL) {
2478                 return 0;
2479         }
2480
2481         /*
2482          * XXX: check reason code, for example we could receive
2483          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2484          * to peer again.
2485          */
2486
2487         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2488             ni, "%s", "recv PEER CLOSE");
2489
2490         switch (ni->ni_mlstate) {
2491         case IEEE80211_NODE_MESH_IDLE:
2492                 /* ignore */
2493                 break;
2494         case IEEE80211_NODE_MESH_OPENRCV:
2495         case IEEE80211_NODE_MESH_OPENSNT:
2496         case IEEE80211_NODE_MESH_CONFIRMRCV:
2497         case IEEE80211_NODE_MESH_ESTABLISHED:
2498                 args[0] = ni->ni_mlpid;
2499                 args[1] = ni->ni_mllid;
2500                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2501                 ieee80211_send_action(ni,
2502                     IEEE80211_ACTION_CAT_SELF_PROT,
2503                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2504                     args);
2505                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2506                 mesh_peer_timeout_setup(ni);
2507                 break;
2508         case IEEE80211_NODE_MESH_HOLDING:
2509                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2510                 mesh_peer_timeout_stop(ni);
2511                 break;
2512         }
2513         return 0;
2514 }
2515
2516 /*
2517  * Link Metric handling.
2518  */
2519 static int
2520 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2521         const struct ieee80211_frame *wh,
2522         const uint8_t *frm, const uint8_t *efrm)
2523 {
2524         const struct ieee80211_meshlmetric_ie *ie =
2525             (const struct ieee80211_meshlmetric_ie *)
2526             (frm+2); /* action + code */
2527         struct ieee80211_meshlmetric_ie lm_rep;
2528
2529         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2530                 lm_rep.lm_flags = 0;
2531                 lm_rep.lm_metric = mesh_airtime_calc(ni);
2532                 ieee80211_send_action(ni,
2533                     IEEE80211_ACTION_CAT_MESH,
2534                     IEEE80211_ACTION_MESH_LMETRIC,
2535                     &lm_rep);
2536         }
2537         /* XXX: else do nothing for now */
2538         return 0;
2539 }
2540
2541 /*
2542  * Parse meshgate action ie's for GANN frames.
2543  * Returns -1 if parsing fails, otherwise 0.
2544  */
2545 static int
2546 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2547     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
2548     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2549 {
2550         struct ieee80211vap *vap = ni->ni_vap;
2551         const struct ieee80211_meshgann_ie *gannie;
2552
2553         while (efrm - frm > 1) {
2554                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2555                 switch (*frm) {
2556                 case IEEE80211_ELEMID_MESHGANN:
2557                         gannie = (const struct ieee80211_meshgann_ie *) frm;
2558                         memset(ie, 0, sizeof(*ie));
2559                         ie->gann_ie = gannie->gann_ie;
2560                         ie->gann_len = gannie->gann_len;
2561                         ie->gann_flags = gannie->gann_flags;
2562                         ie->gann_hopcount = gannie->gann_hopcount;
2563                         ie->gann_ttl = gannie->gann_ttl;
2564                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2565                         ie->gann_seq = LE_READ_4(&gannie->gann_seq);
2566                         ie->gann_interval = LE_READ_2(&gannie->gann_interval);
2567                         break;
2568                 }
2569                 frm += frm[1] + 2;
2570         }
2571
2572         return 0;
2573 }
2574
2575 /*
2576  * Mesh Gate Announcement handling.
2577  */
2578 static int
2579 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2580         const struct ieee80211_frame *wh,
2581         const uint8_t *frm, const uint8_t *efrm)
2582 {
2583         struct ieee80211vap *vap = ni->ni_vap;
2584         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2585         struct ieee80211_mesh_gate_route *gr, *next;
2586         struct ieee80211_mesh_route *rt_gate;
2587         struct ieee80211_meshgann_ie pgann;
2588         struct ieee80211_meshgann_ie ie;
2589         int found = 0;
2590
2591         /* +2 for action + code */
2592         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2593                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2594                     ni->ni_macaddr, NULL, "%s",
2595                     "GANN parsing failed");
2596                 vap->iv_stats.is_rx_mgtdiscard++;
2597                 return (0);
2598         }
2599
2600         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2601                 return 0;
2602
2603         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2604             "received GANN, meshgate: %s (seq %u)",
2605             ether_sprintf(ie.gann_addr),
2606             ie.gann_seq);
2607
2608         if (ms == NULL)
2609                 return (0);
2610         MESH_RT_LOCK(ms);
2611         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2612                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2613                         continue;
2614                 if (ie.gann_seq <= gr->gr_lastseq) {
2615                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2616                             ni->ni_macaddr, NULL,
2617                             "GANN old seqno %u <= %u",
2618                             ie.gann_seq, gr->gr_lastseq);
2619                         MESH_RT_UNLOCK(ms);
2620                         return (0);
2621                 }
2622                 /* corresponding mesh gate found & GANN accepted */
2623                 found = 1;
2624                 break;
2625
2626         }
2627         if (found == 0) {
2628                 /* this GANN is from a new mesh Gate add it to known table. */
2629                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2630                     "stored new GANN information, seq %u.", ie.gann_seq);
2631                 gr = kmalloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2632                     M_80211_MESH_GT_RT, M_INTWAIT | M_ZERO);
2633                 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2634                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2635         }
2636         gr->gr_lastseq = ie.gann_seq;
2637
2638         /* check if we have a path to this gate */
2639         rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2640         if (rt_gate != NULL &&
2641             rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2642                 gr->gr_route = rt_gate;
2643                 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2644         }
2645
2646         MESH_RT_UNLOCK(ms);
2647
2648         /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2649         if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2650                 return 0;
2651                 pgann.gann_flags = ie.gann_flags; /* Reserved */
2652         pgann.gann_hopcount = ie.gann_hopcount + 1;
2653         pgann.gann_ttl = ie.gann_ttl - 1;
2654         IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2655         pgann.gann_seq = ie.gann_seq;
2656         pgann.gann_interval = ie.gann_interval;
2657
2658         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2659             "%s", "propagate GANN");
2660
2661         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2662             IEEE80211_ACTION_MESH_GANN, &pgann);
2663
2664         return 0;
2665 }
2666
2667 static int
2668 mesh_send_action(struct ieee80211_node *ni,
2669     const uint8_t sa[IEEE80211_ADDR_LEN],
2670     const uint8_t da[IEEE80211_ADDR_LEN],
2671     struct mbuf *m)
2672 {
2673         struct ieee80211vap *vap = ni->ni_vap;
2674         struct ieee80211com *ic = ni->ni_ic;
2675         struct ieee80211_bpf_params params;
2676         struct ieee80211_frame *wh;
2677         int ret;
2678
2679         KASSERT(ni != NULL, ("null node"));
2680
2681         if (vap->iv_state == IEEE80211_S_CAC) {
2682                 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2683                     "block %s frame in CAC state", "Mesh action");
2684                 vap->iv_stats.is_tx_badstate++;
2685                 ieee80211_free_node(ni);
2686                 m_freem(m);
2687                 return EIO;             /* XXX */
2688         }
2689
2690         M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2691         if (m == NULL) {
2692                 ieee80211_free_node(ni);
2693                 return ENOMEM;
2694         }
2695
2696         IEEE80211_TX_LOCK(ic);
2697         wh = mtod(m, struct ieee80211_frame *);
2698         ieee80211_send_setup(ni, m,
2699              IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2700              IEEE80211_NONQOS_TID, sa, da, sa);
2701         m->m_flags |= M_ENCAP;          /* mark encapsulated */
2702
2703         memset(&params, 0, sizeof(params));
2704         params.ibp_pri = WME_AC_VO;
2705         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2706         if (IEEE80211_IS_MULTICAST(da))
2707                 params.ibp_try0 = 1;
2708         else
2709                 params.ibp_try0 = ni->ni_txparms->maxretry;
2710         params.ibp_power = ni->ni_txpower;
2711
2712         IEEE80211_NODE_STAT(ni, tx_mgmt);
2713
2714         ret = ieee80211_raw_output(vap, ni, m, &params);
2715         IEEE80211_TX_UNLOCK(ic);
2716         return (ret);
2717 }
2718
2719 #define ADDSHORT(frm, v) do {                   \
2720         frm[0] = (v) & 0xff;                    \
2721         frm[1] = (v) >> 8;                      \
2722         frm += 2;                               \
2723 } while (0)
2724 #define ADDWORD(frm, v) do {                    \
2725         frm[0] = (v) & 0xff;                    \
2726         frm[1] = ((v) >> 8) & 0xff;             \
2727         frm[2] = ((v) >> 16) & 0xff;            \
2728         frm[3] = ((v) >> 24) & 0xff;            \
2729         frm += 4;                               \
2730 } while (0)
2731
2732 static int
2733 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2734         int category, int action, void *args0)
2735 {
2736         struct ieee80211vap *vap = ni->ni_vap;
2737         struct ieee80211com *ic = ni->ni_ic;
2738         uint16_t *args = args0;
2739         const struct ieee80211_rateset *rs;
2740         struct mbuf *m;
2741         uint8_t *frm;
2742
2743         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2744             "send PEER OPEN action: localid 0x%x", args[0]);
2745
2746         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2747             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2748             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2749         ieee80211_ref_node(ni);
2750
2751         m = ieee80211_getmgtframe(&frm,
2752             ic->ic_headroom + sizeof(struct ieee80211_frame),
2753             sizeof(uint16_t)    /* action+category */
2754             + sizeof(uint16_t)  /* capabilites */
2755             + 2 + IEEE80211_RATE_SIZE
2756             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2757             + 2 + IEEE80211_MESHID_LEN
2758             + sizeof(struct ieee80211_meshconf_ie)
2759             + sizeof(struct ieee80211_meshpeer_ie)
2760         );
2761         if (m != NULL) {
2762                 /*
2763                  * mesh peer open action frame format:
2764                  *   [1] category
2765                  *   [1] action
2766                  *   [2] capabilities
2767                  *   [tlv] rates
2768                  *   [tlv] xrates
2769                  *   [tlv] mesh id
2770                  *   [tlv] mesh conf
2771                  *   [tlv] mesh peer link mgmt
2772                  */
2773                 *frm++ = category;
2774                 *frm++ = action;
2775                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2776                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2777                 frm = ieee80211_add_rates(frm, rs);
2778                 frm = ieee80211_add_xrates(frm, rs);
2779                 frm = ieee80211_add_meshid(frm, vap);
2780                 frm = ieee80211_add_meshconf(frm, vap);
2781                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2782                     args[0], 0, 0);
2783                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2784                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2785         } else {
2786                 vap->iv_stats.is_tx_nobuf++;
2787                 ieee80211_free_node(ni);
2788                 return ENOMEM;
2789         }
2790 }
2791
2792 static int
2793 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2794         int category, int action, void *args0)
2795 {
2796         struct ieee80211vap *vap = ni->ni_vap;
2797         struct ieee80211com *ic = ni->ni_ic;
2798         uint16_t *args = args0;
2799         const struct ieee80211_rateset *rs;
2800         struct mbuf *m;
2801         uint8_t *frm;
2802
2803         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2804             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2805             args[0], args[1]);
2806
2807         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2808             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2809             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2810         ieee80211_ref_node(ni);
2811
2812         m = ieee80211_getmgtframe(&frm,
2813             ic->ic_headroom + sizeof(struct ieee80211_frame),
2814             sizeof(uint16_t)    /* action+category */
2815             + sizeof(uint16_t)  /* capabilites */
2816             + sizeof(uint16_t)  /* status code */
2817             + sizeof(uint16_t)  /* AID */
2818             + 2 + IEEE80211_RATE_SIZE
2819             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2820             + 2 + IEEE80211_MESHID_LEN
2821             + sizeof(struct ieee80211_meshconf_ie)
2822             + sizeof(struct ieee80211_meshpeer_ie)
2823         );
2824         if (m != NULL) {
2825                 /*
2826                  * mesh peer confirm action frame format:
2827                  *   [1] category
2828                  *   [1] action
2829                  *   [2] capabilities
2830                  *   [2] status code
2831                  *   [2] association id (peer ID)
2832                  *   [tlv] rates
2833                  *   [tlv] xrates
2834                  *   [tlv] mesh id
2835                  *   [tlv] mesh conf
2836                  *   [tlv] mesh peer link mgmt
2837                  */
2838                 *frm++ = category;
2839                 *frm++ = action;
2840                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2841                 ADDSHORT(frm, 0);               /* status code */
2842                 ADDSHORT(frm, args[1]);         /* AID */
2843                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2844                 frm = ieee80211_add_rates(frm, rs);
2845                 frm = ieee80211_add_xrates(frm, rs);
2846                 frm = ieee80211_add_meshid(frm, vap);
2847                 frm = ieee80211_add_meshconf(frm, vap);
2848                 frm = ieee80211_add_meshpeer(frm,
2849                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2850                     args[0], args[1], 0);
2851                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2852                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2853         } else {
2854                 vap->iv_stats.is_tx_nobuf++;
2855                 ieee80211_free_node(ni);
2856                 return ENOMEM;
2857         }
2858 }
2859
2860 static int
2861 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2862         int category, int action, void *args0)
2863 {
2864         struct ieee80211vap *vap = ni->ni_vap;
2865         struct ieee80211com *ic = ni->ni_ic;
2866         uint16_t *args = args0;
2867         struct mbuf *m;
2868         uint8_t *frm;
2869
2870         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2871             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d",
2872             args[0], args[1], args[2]);
2873
2874         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2875             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2876             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2877         ieee80211_ref_node(ni);
2878
2879         m = ieee80211_getmgtframe(&frm,
2880             ic->ic_headroom + sizeof(struct ieee80211_frame),
2881             sizeof(uint16_t)    /* action+category */
2882             + sizeof(uint16_t)  /* reason code */
2883             + 2 + IEEE80211_MESHID_LEN
2884             + sizeof(struct ieee80211_meshpeer_ie)
2885         );
2886         if (m != NULL) {
2887                 /*
2888                  * mesh peer close action frame format:
2889                  *   [1] category
2890                  *   [1] action
2891                  *   [tlv] mesh id
2892                  *   [tlv] mesh peer link mgmt
2893                  */
2894                 *frm++ = category;
2895                 *frm++ = action;
2896                 frm = ieee80211_add_meshid(frm, vap);
2897                 frm = ieee80211_add_meshpeer(frm,
2898                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2899                     args[0], args[1], args[2]);
2900                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2901                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2902         } else {
2903                 vap->iv_stats.is_tx_nobuf++;
2904                 ieee80211_free_node(ni);
2905                 return ENOMEM;
2906         }
2907 }
2908
2909 static int
2910 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2911         int category, int action, void *arg0)
2912 {
2913         struct ieee80211vap *vap = ni->ni_vap;
2914         struct ieee80211com *ic = ni->ni_ic;
2915         struct ieee80211_meshlmetric_ie *ie = arg0;
2916         struct mbuf *m;
2917         uint8_t *frm;
2918
2919         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2920                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2921                     ni, "%s", "send LINK METRIC REQUEST action");
2922         } else {
2923                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2924                     ni, "send LINK METRIC REPLY action: metric 0x%x",
2925                     ie->lm_metric);
2926         }
2927         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2928             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2929             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2930         ieee80211_ref_node(ni);
2931
2932         m = ieee80211_getmgtframe(&frm,
2933             ic->ic_headroom + sizeof(struct ieee80211_frame),
2934             sizeof(uint16_t) +  /* action+category */
2935             sizeof(struct ieee80211_meshlmetric_ie)
2936         );
2937         if (m != NULL) {
2938                 /*
2939                  * mesh link metric
2940                  *   [1] category
2941                  *   [1] action
2942                  *   [tlv] mesh link metric
2943                  */
2944                 *frm++ = category;
2945                 *frm++ = action;
2946                 frm = ieee80211_add_meshlmetric(frm,
2947                     ie->lm_flags, ie->lm_metric);
2948                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2949                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2950         } else {
2951                 vap->iv_stats.is_tx_nobuf++;
2952                 ieee80211_free_node(ni);
2953                 return ENOMEM;
2954         }
2955 }
2956
2957 static int
2958 mesh_send_action_meshgate(struct ieee80211_node *ni,
2959         int category, int action, void *arg0)
2960 {
2961         struct ieee80211vap *vap = ni->ni_vap;
2962         struct ieee80211com *ic = ni->ni_ic;
2963         struct ieee80211_meshgann_ie *ie = arg0;
2964         struct mbuf *m;
2965         uint8_t *frm;
2966
2967         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2968             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2969             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2970         ieee80211_ref_node(ni);
2971
2972         m = ieee80211_getmgtframe(&frm,
2973             ic->ic_headroom + sizeof(struct ieee80211_frame),
2974             sizeof(uint16_t) +  /* action+category */
2975             IEEE80211_MESHGANN_BASE_SZ
2976         );
2977         if (m != NULL) {
2978                 /*
2979                  * mesh link metric
2980                  *   [1] category
2981                  *   [1] action
2982                  *   [tlv] mesh gate annoucement
2983                  */
2984                 *frm++ = category;
2985                 *frm++ = action;
2986                 frm = ieee80211_add_meshgate(frm, ie);
2987                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2988                 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2989         } else {
2990                 vap->iv_stats.is_tx_nobuf++;
2991                 ieee80211_free_node(ni);
2992                 return ENOMEM;
2993         }
2994 }
2995
2996 static void
2997 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2998 {
2999         switch (ni->ni_mlstate) {
3000         case IEEE80211_NODE_MESH_HOLDING:
3001                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
3002                 break;
3003         case IEEE80211_NODE_MESH_CONFIRMRCV:
3004                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
3005                 break;
3006         case IEEE80211_NODE_MESH_IDLE:
3007                 ni->ni_mltval = 0;
3008                 break;
3009         default:
3010                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
3011                 break;
3012         }
3013         if (ni->ni_mltval)
3014                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
3015                     mesh_peer_timeout_cb, ni);
3016 }
3017
3018 /*
3019  * Same as above but backoffs timer statisically 50%.
3020  */
3021 static void
3022 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3023 {
3024         uint32_t r;
3025
3026         r = arc4random();
3027         ni->ni_mltval += r % ni->ni_mltval;
3028         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3029             ni);
3030 }
3031
3032 static __inline void
3033 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3034 {
3035         callout_drain(&ni->ni_mltimer);
3036 }
3037
3038 static void
3039 mesh_peer_backoff_cb(void *arg)
3040 {
3041         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3042
3043         /* After backoff timeout, try to peer automatically again. */
3044         ni->ni_mlhcnt = 0;
3045 }
3046
3047 /*
3048  * Mesh Peer Link Management FSM timeout handling.
3049  */
3050 static void
3051 mesh_peer_timeout_cb(void *arg)
3052 {
3053         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3054         uint16_t args[3];
3055
3056         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3057             ni, "mesh link timeout, state %d, retry counter %d",
3058             ni->ni_mlstate, ni->ni_mlrcnt);
3059
3060         switch (ni->ni_mlstate) {
3061         case IEEE80211_NODE_MESH_IDLE:
3062         case IEEE80211_NODE_MESH_ESTABLISHED:
3063                 break;
3064         case IEEE80211_NODE_MESH_OPENSNT:
3065         case IEEE80211_NODE_MESH_OPENRCV:
3066                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3067                         args[0] = ni->ni_mlpid;
3068                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3069                         ieee80211_send_action(ni,
3070                             IEEE80211_ACTION_CAT_SELF_PROT,
3071                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3072                         ni->ni_mlrcnt = 0;
3073                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3074                         mesh_peer_timeout_setup(ni);
3075                 } else {
3076                         args[0] = ni->ni_mlpid;
3077                         ieee80211_send_action(ni,
3078                             IEEE80211_ACTION_CAT_SELF_PROT,
3079                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
3080                         ni->ni_mlrcnt++;
3081                         mesh_peer_timeout_backoff(ni);
3082                 }
3083                 break;
3084         case IEEE80211_NODE_MESH_CONFIRMRCV:
3085                 args[0] = ni->ni_mlpid;
3086                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3087                 ieee80211_send_action(ni,
3088                     IEEE80211_ACTION_CAT_SELF_PROT,
3089                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3090                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3091                 mesh_peer_timeout_setup(ni);
3092                 break;
3093         case IEEE80211_NODE_MESH_HOLDING:
3094                 ni->ni_mlhcnt++;
3095                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3096                         callout_reset(&ni->ni_mlhtimer,
3097                             ieee80211_mesh_backofftimeout,
3098                             mesh_peer_backoff_cb, ni);
3099                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3100                 break;
3101         }
3102 }
3103
3104 static int
3105 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3106 {
3107         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3108
3109         if (ie == NULL || ie[1] != ms->ms_idlen)
3110                 return 1;
3111         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3112 }
3113
3114 /*
3115  * Check if we are using the same algorithms for this mesh.
3116  */
3117 static int
3118 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3119 {
3120         const struct ieee80211_meshconf_ie *meshconf =
3121             (const struct ieee80211_meshconf_ie *) ie;
3122         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3123
3124         if (meshconf == NULL)
3125                 return 1;
3126         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3127                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3128                     "unknown path selection algorithm: 0x%x\n",
3129                     meshconf->conf_pselid);
3130                 return 1;
3131         }
3132         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3133                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3134                     "unknown path metric algorithm: 0x%x\n",
3135                     meshconf->conf_pmetid);
3136                 return 1;
3137         }
3138         if (meshconf->conf_ccid != 0) {
3139                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3140                     "unknown congestion control algorithm: 0x%x\n",
3141                     meshconf->conf_ccid);
3142                 return 1;
3143         }
3144         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3145                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3146                     "unknown sync algorithm: 0x%x\n",
3147                     meshconf->conf_syncid);
3148                 return 1;
3149         }
3150         if (meshconf->conf_authid != 0) {
3151                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3152                     "unknown auth auth algorithm: 0x%x\n",
3153                     meshconf->conf_pselid);
3154                 return 1;
3155         }
3156         /* Not accepting peers */
3157         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3158                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3159                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
3160                 return 1;
3161         }
3162         return 0;
3163 }
3164
3165 static int
3166 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3167     const uint8_t *ie)
3168 {
3169         const struct ieee80211_meshpeer_ie *meshpeer =
3170             (const struct ieee80211_meshpeer_ie *) ie;
3171
3172         if (meshpeer == NULL ||
3173             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3174             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3175                 return 1;
3176         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3177                 IEEE80211_DPRINTF(vap,
3178                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3179                     "Only MPM protocol is supported (proto: 0x%02X)",
3180                     meshpeer->peer_proto);
3181                 return 1;
3182         }
3183         switch (subtype) {
3184         case IEEE80211_ACTION_MESHPEERING_OPEN:
3185                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3186                         return 1;
3187                 break;
3188         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3189                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3190                         return 1;
3191                 break;
3192         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3193                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3194                         return 1;
3195                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3196                     meshpeer->peer_linkid != 0)
3197                         return 1;
3198                 if (meshpeer->peer_rcode == 0)
3199                         return 1;
3200                 break;
3201         }
3202         return 0;
3203 }
3204
3205 /*
3206  * Add a Mesh ID IE to a frame.
3207  */
3208 uint8_t *
3209 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3210 {
3211         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3212
3213         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3214
3215         *frm++ = IEEE80211_ELEMID_MESHID;
3216         *frm++ = ms->ms_idlen;
3217         memcpy(frm, ms->ms_id, ms->ms_idlen);
3218         return frm + ms->ms_idlen;
3219 }
3220
3221 /*
3222  * Add a Mesh Configuration IE to a frame.
3223  * For now just use HWMP routing, Airtime link metric, Null Congestion
3224  * Signaling, Null Sync Protocol and Null Authentication.
3225  */
3226 uint8_t *
3227 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3228 {
3229         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3230         uint16_t caps;
3231
3232         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3233
3234         *frm++ = IEEE80211_ELEMID_MESHCONF;
3235         *frm++ = IEEE80211_MESH_CONF_SZ;
3236         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
3237         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
3238         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3239         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3240         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3241         /* NB: set the number of neighbors before the rest */
3242         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3243             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3244         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3245                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3246         frm += 1;
3247         caps = 0;
3248         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3249                 caps |= IEEE80211_MESHCONF_CAP_AP;
3250         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3251                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3252         *frm++ = caps;
3253         return frm;
3254 }
3255
3256 /*
3257  * Add a Mesh Peer Management IE to a frame.
3258  */
3259 uint8_t *
3260 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3261     uint16_t peerid, uint16_t reason)
3262 {
3263
3264         KASSERT(localid != 0, ("localid == 0"));
3265
3266         *frm++ = IEEE80211_ELEMID_MESHPEER;
3267         switch (subtype) {
3268         case IEEE80211_ACTION_MESHPEERING_OPEN:
3269                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
3270                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3271                 ADDSHORT(frm, localid);                 /* local ID */
3272                 break;
3273         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3274                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3275                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
3276                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3277                 ADDSHORT(frm, localid);                 /* local ID */
3278                 ADDSHORT(frm, peerid);                  /* peer ID */
3279                 break;
3280         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3281                 if (peerid)
3282                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
3283                 else
3284                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3285                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3286                 ADDSHORT(frm, localid); /* local ID */
3287                 if (peerid)
3288                         ADDSHORT(frm, peerid);  /* peer ID */
3289                 ADDSHORT(frm, reason);
3290                 break;
3291         }
3292         return frm;
3293 }
3294
3295 /*
3296  * Compute an Airtime Link Metric for the link with this node.
3297  *
3298  * Based on Draft 3.0 spec (11B.10, p.149).
3299  */
3300 /*
3301  * Max 802.11s overhead.
3302  */
3303 #define IEEE80211_MESH_MAXOVERHEAD \
3304         (sizeof(struct ieee80211_qosframe_addr4) \
3305          + sizeof(struct ieee80211_meshcntl_ae10) \
3306         + sizeof(struct llc) \
3307         + IEEE80211_ADDR_LEN \
3308         + IEEE80211_WEP_IVLEN \
3309         + IEEE80211_WEP_KIDLEN \
3310         + IEEE80211_WEP_CRCLEN \
3311         + IEEE80211_WEP_MICLEN \
3312         + IEEE80211_CRC_LEN)
3313 uint32_t
3314 mesh_airtime_calc(struct ieee80211_node *ni)
3315 {
3316 #define M_BITS 8
3317 #define S_FACTOR (2 * M_BITS)
3318         struct ieee80211com *ic = ni->ni_ic;
3319         struct ifnet *ifp = ni->ni_vap->iv_ifp;
3320         static const int nbits = 8192 << M_BITS;
3321         uint32_t overhead, rate, errrate;
3322         uint64_t res;
3323
3324         /* Time to transmit a frame */
3325         rate = ni->ni_txrate;
3326         overhead = ieee80211_compute_duration(ic->ic_rt,
3327             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3328         /* Error rate in percentage */
3329         /* XXX assuming small failures are ok */
3330 #if defined(__DragonFly__)
3331         u_long  icount;
3332         u_long  ocount;
3333         IFNET_STAT_GET(ifp, ierrors, icount);
3334         IFNET_STAT_GET(ifp, oerrors, ocount);
3335         errrate = (((ocount + icount) / 100) << M_BITS)
3336             / 100;
3337 #else
3338         errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
3339             ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
3340             / 100;
3341 #endif
3342         res = (overhead + (nbits / rate)) *
3343             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3344
3345         return (uint32_t)(res >> S_FACTOR);
3346 #undef M_BITS
3347 #undef S_FACTOR
3348 }
3349
3350 /*
3351  * Add a Mesh Link Metric report IE to a frame.
3352  */
3353 uint8_t *
3354 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3355 {
3356         *frm++ = IEEE80211_ELEMID_MESHLINK;
3357         *frm++ = 5;
3358         *frm++ = flags;
3359         ADDWORD(frm, metric);
3360         return frm;
3361 }
3362
3363 /*
3364  * Add a Mesh Gate Announcement IE to a frame.
3365  */
3366 uint8_t *
3367 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3368 {
3369         *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3370         *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3371         *frm++ = ie->gann_flags;
3372         *frm++ = ie->gann_hopcount;
3373         *frm++ = ie->gann_ttl;
3374         IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3375         frm += 6;
3376         ADDWORD(frm, ie->gann_seq);
3377         ADDSHORT(frm, ie->gann_interval);
3378         return frm;
3379 }
3380 #undef ADDSHORT
3381 #undef ADDWORD
3382
3383 /*
3384  * Initialize any mesh-specific node state.
3385  */
3386 void
3387 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3388 {
3389         ni->ni_flags |= IEEE80211_NODE_QOS;
3390         callout_init_mp(&ni->ni_mltimer);
3391         callout_init_mp(&ni->ni_mlhtimer);
3392 }
3393
3394 /*
3395  * Cleanup any mesh-specific node state.
3396  */
3397 void
3398 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3399 {
3400         struct ieee80211vap *vap = ni->ni_vap;
3401         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3402
3403         callout_drain(&ni->ni_mltimer);
3404         callout_drain(&ni->ni_mlhtimer);
3405         /* NB: short-circuit callbacks after mesh_vdetach */
3406         if (vap->iv_mesh != NULL)
3407                 ms->ms_ppath->mpp_peerdown(ni);
3408 }
3409
3410 void
3411 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3412 {
3413         ni->ni_meshidlen = ie[1];
3414         memcpy(ni->ni_meshid, ie + 2, ie[1]);
3415 }
3416
3417 /*
3418  * Setup mesh-specific node state on neighbor discovery.
3419  */
3420 void
3421 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3422         const struct ieee80211_frame *wh,
3423         const struct ieee80211_scanparams *sp)
3424 {
3425         ieee80211_parse_meshid(ni, sp->meshid);
3426 }
3427
3428 void
3429 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3430         struct ieee80211_beacon_offsets *bo)
3431 {
3432         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3433
3434         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3435                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3436                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3437         }
3438 }
3439
3440 static int
3441 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3442 {
3443         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3444         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3445         struct ieee80211_mesh_route *rt;
3446         struct ieee80211req_mesh_route *imr;
3447         size_t len, off;
3448         uint8_t *p;
3449         int error;
3450
3451         if (vap->iv_opmode != IEEE80211_M_MBSS)
3452                 return ENOSYS;
3453
3454         error = 0;
3455         switch (ireq->i_type) {
3456         case IEEE80211_IOC_MESH_ID:
3457                 ireq->i_len = ms->ms_idlen;
3458                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3459                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3460                 break;
3461         case IEEE80211_IOC_MESH_AP:
3462                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3463                 break;
3464         case IEEE80211_IOC_MESH_FWRD:
3465                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3466                 break;
3467         case IEEE80211_IOC_MESH_GATE:
3468                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3469                 break;
3470         case IEEE80211_IOC_MESH_TTL:
3471                 ireq->i_val = ms->ms_ttl;
3472                 break;
3473         case IEEE80211_IOC_MESH_RTCMD:
3474                 switch (ireq->i_val) {
3475                 case IEEE80211_MESH_RTCMD_LIST:
3476                         len = 0;
3477                         MESH_RT_LOCK(ms);
3478                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3479                                 len += sizeof(*imr);
3480                         }
3481                         MESH_RT_UNLOCK(ms);
3482                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3483                                 ireq->i_len = len;
3484                                 return ENOMEM;
3485                         }
3486                         ireq->i_len = len;
3487                         /* XXX M_WAIT? */
3488                         p = kmalloc(len, M_TEMP, M_INTWAIT | M_ZERO);
3489                         if (p == NULL)
3490                                 return ENOMEM;
3491                         off = 0;
3492                         MESH_RT_LOCK(ms);
3493                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3494                                 if (off >= len)
3495                                         break;
3496                                 imr = (struct ieee80211req_mesh_route *)
3497                                     (p + off);
3498                                 IEEE80211_ADDR_COPY(imr->imr_dest,
3499                                     rt->rt_dest);
3500                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3501                                     rt->rt_nexthop);
3502                                 imr->imr_metric = rt->rt_metric;
3503                                 imr->imr_nhops = rt->rt_nhops;
3504                                 imr->imr_lifetime =
3505                                     ieee80211_mesh_rt_update(rt, 0);
3506                                 imr->imr_lastmseq = rt->rt_lastmseq;
3507                                 imr->imr_flags = rt->rt_flags; /* last */
3508                                 off += sizeof(*imr);
3509                         }
3510                         MESH_RT_UNLOCK(ms);
3511                         error = copyout(p, (uint8_t *)ireq->i_data,
3512                             ireq->i_len);
3513                         kfree(p, M_TEMP);
3514                         break;
3515                 case IEEE80211_MESH_RTCMD_FLUSH:
3516                 case IEEE80211_MESH_RTCMD_ADD:
3517                 case IEEE80211_MESH_RTCMD_DELETE:
3518                         return EINVAL;
3519                 default:
3520                         return ENOSYS;
3521                 }
3522                 break;
3523         case IEEE80211_IOC_MESH_PR_METRIC:
3524                 len = strlen(ms->ms_pmetric->mpm_descr);
3525                 if (ireq->i_len < len)
3526                         return EINVAL;
3527                 ireq->i_len = len;
3528                 error = copyout(ms->ms_pmetric->mpm_descr,
3529                     (uint8_t *)ireq->i_data, len);
3530                 break;
3531         case IEEE80211_IOC_MESH_PR_PATH:
3532                 len = strlen(ms->ms_ppath->mpp_descr);
3533                 if (ireq->i_len < len)
3534                         return EINVAL;
3535                 ireq->i_len = len;
3536                 error = copyout(ms->ms_ppath->mpp_descr,
3537                     (uint8_t *)ireq->i_data, len);
3538                 break;
3539         default:
3540                 return ENOSYS;
3541         }
3542
3543         return error;
3544 }
3545 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3546
3547 static int
3548 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3549 {
3550         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3551         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3552         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3553         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3554         int error;
3555
3556         if (vap->iv_opmode != IEEE80211_M_MBSS)
3557                 return ENOSYS;
3558
3559         error = 0;
3560         switch (ireq->i_type) {
3561         case IEEE80211_IOC_MESH_ID:
3562                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3563                         return EINVAL;
3564                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3565                 if (error != 0)
3566                         break;
3567                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3568                 ms->ms_idlen = ireq->i_len;
3569                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3570                 error = ENETRESET;
3571                 break;
3572         case IEEE80211_IOC_MESH_AP:
3573                 if (ireq->i_val)
3574                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3575                 else
3576                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3577                 error = ENETRESET;
3578                 break;
3579         case IEEE80211_IOC_MESH_FWRD:
3580                 if (ireq->i_val)
3581                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3582                 else
3583                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3584                 mesh_gatemode_setup(vap);
3585                 break;
3586         case IEEE80211_IOC_MESH_GATE:
3587                 if (ireq->i_val)
3588                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3589                 else
3590                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3591                 break;
3592         case IEEE80211_IOC_MESH_TTL:
3593                 ms->ms_ttl = (uint8_t) ireq->i_val;
3594                 break;
3595         case IEEE80211_IOC_MESH_RTCMD:
3596                 switch (ireq->i_val) {
3597                 case IEEE80211_MESH_RTCMD_LIST:
3598                         return EINVAL;
3599                 case IEEE80211_MESH_RTCMD_FLUSH:
3600                         ieee80211_mesh_rt_flush(vap);
3601                         break;
3602                 case IEEE80211_MESH_RTCMD_ADD:
3603                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
3604                             IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
3605                                 return EINVAL;
3606                         error = copyin(ireq->i_data, &tmpaddr,
3607                             IEEE80211_ADDR_LEN);
3608                         if (error == 0)
3609                                 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3610                         break;
3611                 case IEEE80211_MESH_RTCMD_DELETE:
3612                         ieee80211_mesh_rt_del(vap, ireq->i_data);
3613                         break;
3614                 default:
3615                         return ENOSYS;
3616                 }
3617                 break;
3618         case IEEE80211_IOC_MESH_PR_METRIC:
3619                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3620                 if (error == 0) {
3621                         error = mesh_select_proto_metric(vap, tmpproto);
3622                         if (error == 0)
3623                                 error = ENETRESET;
3624                 }
3625                 break;
3626         case IEEE80211_IOC_MESH_PR_PATH:
3627                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3628                 if (error == 0) {
3629                         error = mesh_select_proto_path(vap, tmpproto);
3630                         if (error == 0)
3631                                 error = ENETRESET;
3632                 }
3633                 break;
3634         default:
3635                 return ENOSYS;
3636         }
3637         return error;
3638 }
3639 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);