sys/net80211/ieee80211_mesh.c

   1 /*-
   2  * Copyright (c) 2009 The FreeBSD Foundation
   3  * All rights reserved.
   4  *
   5  * This software was developed by Rui Paulo under sponsorship from the
   6  * FreeBSD Foundation.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 #include <sys/cdefs.h>
  30 #ifdef __FreeBSD__
  31 __FBSDID("$FreeBSD$");
  32 #endif
  33
  34 /*
  35  * IEEE 802.11s Mesh Point (MBSS) support.
  36  *
  37  * Based on March 2009, D3.0 802.11s draft spec.
  38  */
  39 #include "opt_inet.h"
  40 #include "opt_wlan.h"
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/malloc.h>
  46 #include <sys/kernel.h>
  47
  48 #include <sys/socket.h>
  49 #include <sys/sockio.h>
  50 #include <sys/endian.h>
  51 #include <sys/errno.h>
  52 #include <sys/proc.h>
  53 #include <sys/sysctl.h>
  54
  55 #include <net/if.h>
  56 #include <net/if_media.h>
  57 #include <net/if_llc.h>
  58 #include <net/ethernet.h>
  59
  60 #include <net80211/ieee80211_var.h>
  61 #include <net80211/ieee80211_action.h>
  62 #include <net80211/ieee80211_input.h>
  63 #include <net80211/ieee80211_mesh.h>
  64
  65 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
  66 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
  67 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
  68 static void     mesh_vattach(struct ieee80211vap *);
  69 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  70 static void     mesh_rt_cleanup_cb(void *);
  71 static void     mesh_linkchange(struct ieee80211_node *,
  72                     enum ieee80211_mesh_mlstate);
  73 static void     mesh_checkid(void *, struct ieee80211_node *);
  74 static uint32_t mesh_generateid(struct ieee80211vap *);
  75 static int      mesh_checkpseq(struct ieee80211vap *,
  76                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
  77 static struct ieee80211_node *
  78                 mesh_find_txnode(struct ieee80211vap *,
  79                     const uint8_t [IEEE80211_ADDR_LEN]);
  80 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
  81                     const struct ieee80211_meshcntl *);
  82 static int      mesh_input(struct ieee80211_node *, struct mbuf *, int, int);
  83 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
  84                     int, int);
  85 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  86 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
  87 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
  88 static void     mesh_peer_timeout_cb(void *);
  89 static __inline void
  90                 mesh_peer_timeout_stop(struct ieee80211_node *);
  91 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
  92 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
  93 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
  94                     const uint8_t *);
  95 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
  96
  97 /*
  98  * Timeout values come from the specification and are in milliseconds.
  99  */
 100 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
 101     "IEEE 802.11s parameters");
 102 static int ieee80211_mesh_retrytimeout = -1;
 103 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
 104     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 105     "Retry timeout (msec)");
 106 static int ieee80211_mesh_holdingtimeout = -1;
 107 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
 108     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 109     "Holding state timeout (msec)");
 110 static int ieee80211_mesh_confirmtimeout = -1;
 111 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
 112     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 113     "Confirm state timeout (msec)");
 114 static int ieee80211_mesh_maxretries = 2;
 115 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW,
 116     &ieee80211_mesh_maxretries, 0,
 117     "Maximum retries during peer link establishment");
 118
 119 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
 120         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 121
 122 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
 123 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
 124 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
 125 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric_req;
 126 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric_rep;
 127
 128 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
 129 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
 130 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
 131 static  ieee80211_send_action_func mesh_send_action_meshlink_request;
 132 static  ieee80211_send_action_func mesh_send_action_meshlink_reply;
 133
 134 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
 135         .mpm_descr      = "AIRTIME",
 136         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
 137         .mpm_metric     = mesh_airtime_calc,
 138 };
 139
 140 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
 141 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
 142
 143 #define MESH_RT_LOCK(ms)        mtx_lock(&(ms)->ms_rt_lock)
 144 #define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED)
 145 #define MESH_RT_UNLOCK(ms)      mtx_unlock(&(ms)->ms_rt_lock)
 146
 147 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh", "802.11s routing table");
 148
 149 /*
 150  * Helper functions to manipulate the Mesh routing table.
 151  */
 152
 153 static struct ieee80211_mesh_route *
 154 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
 155     const uint8_t dest[IEEE80211_ADDR_LEN])
 156 {
 157         struct ieee80211_mesh_route *rt;
 158
 159         MESH_RT_LOCK_ASSERT(ms);
 160
 161         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 162                 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
 163                         return rt;
 164         }
 165         return NULL;
 166 }
 167
 168 static struct ieee80211_mesh_route *
 169 mesh_rt_add_locked(struct ieee80211_mesh_state *ms,
 170     const uint8_t dest[IEEE80211_ADDR_LEN])
 171 {
 172         struct ieee80211_mesh_route *rt;
 173
 174         KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
 175             ("%s: adding broadcast to the routing table", __func__));
 176
 177         MESH_RT_LOCK_ASSERT(ms);
 178
 179         rt = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) +
 180             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | M_ZERO);
 181         if (rt != NULL) {
 182                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
 183                 rt->rt_priv = (void *)ALIGN(&rt[1]);
 184                 rt->rt_crtime = ticks;
 185                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
 186         }
 187         return rt;
 188 }
 189
 190 struct ieee80211_mesh_route *
 191 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
 192     const uint8_t dest[IEEE80211_ADDR_LEN])
 193 {
 194         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 195         struct ieee80211_mesh_route *rt;
 196
 197         MESH_RT_LOCK(ms);
 198         rt = mesh_rt_find_locked(ms, dest);
 199         MESH_RT_UNLOCK(ms);
 200         return rt;
 201 }
 202
 203 struct ieee80211_mesh_route *
 204 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
 205     const uint8_t dest[IEEE80211_ADDR_LEN])
 206 {
 207         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 208         struct ieee80211_mesh_route *rt;
 209
 210         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
 211             ("%s: duplicate entry in the routing table", __func__));
 212         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
 213             ("%s: adding self to the routing table", __func__));
 214
 215         MESH_RT_LOCK(ms);
 216         rt = mesh_rt_add_locked(ms, dest);
 217         MESH_RT_UNLOCK(ms);
 218         return rt;
 219 }
 220
 221 /*
 222  * Add a proxy route (as needed) for the specified destination.
 223  */
 224 void
 225 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
 226     const uint8_t dest[IEEE80211_ADDR_LEN])
 227 {
 228         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 229         struct ieee80211_mesh_route *rt;
 230
 231         MESH_RT_LOCK(ms);
 232         rt = mesh_rt_find_locked(ms, dest);
 233         if (rt == NULL) {
 234                 rt = mesh_rt_add_locked(ms, dest);
 235                 if (rt == NULL) {
 236                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 237                             "%s", "unable to add proxy entry");
 238                         vap->iv_stats.is_mesh_rtaddfailed++;
 239                 } else {
 240                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 241                             "%s", "add proxy entry");
 242                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 243                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 244                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
 245                 }
 246         /* XXX assert PROXY? */
 247         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 248                 struct ieee80211com *ic = vap->iv_ic;
 249                 /*
 250                  * Fix existing entry created by received frames from
 251                  * stations that have some memory of dest.  We also
 252                  * flush any frames held on the staging queue; delivering
 253                  * them is too much trouble right now.
 254                  */
 255                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 256                     "%s", "fix proxy entry");
 257                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 258                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 259                              |  IEEE80211_MESHRT_FLAGS_PROXY;
 260                 /* XXX belongs in hwmp */
 261                 ieee80211_ageq_drain_node(&ic->ic_stageq,
 262                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
 263                 /* XXX stat? */
 264         }
 265         MESH_RT_UNLOCK(ms);
 266 }
 267
 268 static __inline void
 269 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
 270 {
 271         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
 272         free(rt, M_80211_MESH_RT);
 273 }
 274
 275 void
 276 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
 277     const uint8_t dest[IEEE80211_ADDR_LEN])
 278 {
 279         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 280         struct ieee80211_mesh_route *rt, *next;
 281
 282         MESH_RT_LOCK(ms);
 283         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 284                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
 285                         mesh_rt_del(ms, rt);
 286                         MESH_RT_UNLOCK(ms);
 287                         return;
 288                 }
 289         }
 290         MESH_RT_UNLOCK(ms);
 291 }
 292
 293 void
 294 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
 295 {
 296         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 297         struct ieee80211_mesh_route *rt, *next;
 298
 299         if (ms == NULL)
 300                 return;
 301         MESH_RT_LOCK(ms);
 302         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
 303                 mesh_rt_del(ms, rt);
 304         MESH_RT_UNLOCK(ms);
 305 }
 306
 307 void
 308 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
 309     const uint8_t peer[IEEE80211_ADDR_LEN])
 310 {
 311         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 312         struct ieee80211_mesh_route *rt, *next;
 313
 314         MESH_RT_LOCK(ms);
 315         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 316                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
 317                         mesh_rt_del(ms, rt);
 318         }
 319         MESH_RT_UNLOCK(ms);
 320 }
 321
 322 /*
 323  * Flush expired routing entries, i.e. those in invalid state for
 324  * some time.
 325  */
 326 static void
 327 mesh_rt_flush_invalid(struct ieee80211vap *vap)
 328 {
 329         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 330         struct ieee80211_mesh_route *rt, *next;
 331
 332         if (ms == NULL)
 333                 return;
 334         MESH_RT_LOCK(ms);
 335         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 336                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 &&
 337                     ticks - rt->rt_crtime >= ms->ms_ppath->mpp_inact)
 338                         mesh_rt_del(ms, rt);
 339         }
 340         MESH_RT_UNLOCK(ms);
 341 }
 342
 343 #define N(a)    (sizeof(a) / sizeof(a[0]))
 344 int
 345 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
 346 {
 347         int i, firstempty = -1;
 348
 349         for (i = 0; i < N(mesh_proto_paths); i++) {
 350                 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
 351                     IEEE80211_MESH_PROTO_DSZ) == 0)
 352                         return EEXIST;
 353                 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
 354                         firstempty = i;
 355         }
 356         if (firstempty < 0)
 357                 return ENOSPC;
 358         memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
 359         mesh_proto_paths[firstempty].mpp_active = 1;
 360         return 0;
 361 }
 362
 363 int
 364 ieee80211_mesh_register_proto_metric(const struct
 365     ieee80211_mesh_proto_metric *mpm)
 366 {
 367         int i, firstempty = -1;
 368
 369         for (i = 0; i < N(mesh_proto_metrics); i++) {
 370                 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
 371                     IEEE80211_MESH_PROTO_DSZ) == 0)
 372                         return EEXIST;
 373                 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
 374                         firstempty = i;
 375         }
 376         if (firstempty < 0)
 377                 return ENOSPC;
 378         memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
 379         mesh_proto_metrics[firstempty].mpm_active = 1;
 380         return 0;
 381 }
 382
 383 static int
 384 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
 385 {
 386         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 387         int i;
 388
 389         for (i = 0; i < N(mesh_proto_paths); i++) {
 390                 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
 391                         ms->ms_ppath = &mesh_proto_paths[i];
 392                         return 0;
 393                 }
 394         }
 395         return ENOENT;
 396 }
 397
 398 static int
 399 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
 400 {
 401         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 402         int i;
 403
 404         for (i = 0; i < N(mesh_proto_metrics); i++) {
 405                 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
 406                         ms->ms_pmetric = &mesh_proto_metrics[i];
 407                         return 0;
 408                 }
 409         }
 410         return ENOENT;
 411 }
 412 #undef  N
 413
 414 static void
 415 ieee80211_mesh_init(void)
 416 {
 417
 418         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
 419         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
 420
 421         /*
 422          * Setup mesh parameters that depends on the clock frequency.
 423          */
 424         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
 425         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
 426         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
 427
 428         /*
 429          * Register action frame handlers.
 430          */
 431         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
 432             IEEE80211_ACTION_MESHPEERING_OPEN,
 433             mesh_recv_action_meshpeering_open);
 434         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
 435             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 436             mesh_recv_action_meshpeering_confirm);
 437         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
 438             IEEE80211_ACTION_MESHPEERING_CLOSE,
 439             mesh_recv_action_meshpeering_close);
 440         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC,
 441             IEEE80211_ACTION_MESHLMETRIC_REQ, mesh_recv_action_meshlmetric_req);
 442         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC,
 443             IEEE80211_ACTION_MESHLMETRIC_REP, mesh_recv_action_meshlmetric_rep);
 444
 445         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
 446             IEEE80211_ACTION_MESHPEERING_OPEN,
 447             mesh_send_action_meshpeering_open);
 448         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
 449             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 450             mesh_send_action_meshpeering_confirm);
 451         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHPEERING,
 452             IEEE80211_ACTION_MESHPEERING_CLOSE,
 453             mesh_send_action_meshpeering_close);
 454         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC,
 455             IEEE80211_ACTION_MESHLMETRIC_REQ,
 456             mesh_send_action_meshlink_request);
 457         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESHLMETRIC,
 458             IEEE80211_ACTION_MESHLMETRIC_REP,
 459             mesh_send_action_meshlink_reply);
 460
 461         /*
 462          * Register Airtime Link Metric.
 463          */
 464         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
 465
 466 }
 467 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
 468
 469 void
 470 ieee80211_mesh_attach(struct ieee80211com *ic)
 471 {
 472         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
 473 }
 474
 475 void
 476 ieee80211_mesh_detach(struct ieee80211com *ic)
 477 {
 478 }
 479
 480 static void
 481 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
 482 {
 483         struct ieee80211com *ic = ni->ni_ic;
 484         uint16_t args[3];
 485
 486         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
 487                 args[0] = ni->ni_mlpid;
 488                 args[1] = ni->ni_mllid;
 489                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 490                 ieee80211_send_action(ni,
 491                     IEEE80211_ACTION_CAT_MESHPEERING,
 492                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 493                     args);
 494         }
 495         callout_drain(&ni->ni_mltimer);
 496         /* XXX belongs in hwmp */
 497         ieee80211_ageq_drain_node(&ic->ic_stageq,
 498            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
 499 }
 500
 501 static void
 502 mesh_vdetach(struct ieee80211vap *vap)
 503 {
 504         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 505
 506         callout_drain(&ms->ms_cleantimer);
 507         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
 508             NULL);
 509         ieee80211_mesh_rt_flush(vap);
 510         mtx_destroy(&ms->ms_rt_lock);
 511         ms->ms_ppath->mpp_vdetach(vap);
 512         free(vap->iv_mesh, M_80211_VAP);
 513         vap->iv_mesh = NULL;
 514 }
 515
 516 static void
 517 mesh_vattach(struct ieee80211vap *vap)
 518 {
 519         struct ieee80211_mesh_state *ms;
 520         vap->iv_newstate = mesh_newstate;
 521         vap->iv_input = mesh_input;
 522         vap->iv_opdetach = mesh_vdetach;
 523         vap->iv_recv_mgmt = mesh_recv_mgmt;
 524         vap->iv_recv_ctl = mesh_recv_ctl;
 525         ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
 526             M_NOWAIT | M_ZERO);
 527         if (ms == NULL) {
 528                 printf("%s: couldn't alloc MBSS state\n", __func__);
 529                 return;
 530         }
 531         vap->iv_mesh = ms;
 532         ms->ms_seq = 0;
 533         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
 534         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
 535         TAILQ_INIT(&ms->ms_routes);
 536         mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF);
 537         callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE);
 538         mesh_select_proto_metric(vap, "AIRTIME");
 539         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
 540         mesh_select_proto_path(vap, "HWMP");
 541         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
 542         ms->ms_ppath->mpp_vattach(vap);
 543 }
 544
 545 /*
 546  * IEEE80211_M_MBSS vap state machine handler.
 547  */
 548 static int
 549 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 550 {
 551         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 552         struct ieee80211com *ic = vap->iv_ic;
 553         struct ieee80211_node *ni;
 554         enum ieee80211_state ostate;
 555
 556         IEEE80211_LOCK_ASSERT(ic);
 557
 558         ostate = vap->iv_state;
 559         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 560             __func__, ieee80211_state_name[ostate],
 561             ieee80211_state_name[nstate], arg);
 562         vap->iv_state = nstate;         /* state transition */
 563         if (ostate != IEEE80211_S_SCAN)
 564                 ieee80211_cancel_scan(vap);     /* background scan */
 565         ni = vap->iv_bss;                       /* NB: no reference held */
 566         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN)
 567                 callout_drain(&ms->ms_cleantimer);
 568         switch (nstate) {
 569         case IEEE80211_S_INIT:
 570                 switch (ostate) {
 571                 case IEEE80211_S_SCAN:
 572                         ieee80211_cancel_scan(vap);
 573                         break;
 574                 case IEEE80211_S_CAC:
 575                         ieee80211_dfs_cac_stop(vap);
 576                         break;
 577                 case IEEE80211_S_RUN:
 578                         ieee80211_iterate_nodes(&ic->ic_sta,
 579                             mesh_vdetach_peers, NULL);
 580                         break;
 581                 default:
 582                         break;
 583                 }
 584                 if (ostate != IEEE80211_S_INIT) {
 585                         /* NB: optimize INIT -> INIT case */
 586                         ieee80211_reset_bss(vap);
 587                         ieee80211_mesh_rt_flush(vap);
 588                 }
 589                 break;
 590         case IEEE80211_S_SCAN:
 591                 switch (ostate) {
 592                 case IEEE80211_S_INIT:
 593                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 594                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
 595                             ms->ms_idlen != 0) {
 596                                 /*
 597                                  * Already have a channel and a mesh ID; bypass
 598                                  * the scan and startup immediately.
 599                                  */
 600                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 601                                 break;
 602                         }
 603                         /*
 604                          * Initiate a scan.  We can come here as a result
 605                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 606                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 607                          * and the scan request parameters will be present
 608                          * in iv_scanreq.  Otherwise we do the default.
 609                         */
 610                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 611                                 ieee80211_check_scan(vap,
 612                                     vap->iv_scanreq_flags,
 613                                     vap->iv_scanreq_duration,
 614                                     vap->iv_scanreq_mindwell,
 615                                     vap->iv_scanreq_maxdwell,
 616                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 617                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 618                         } else
 619                                 ieee80211_check_scan_current(vap);
 620                         break;
 621                 default:
 622                         break;
 623                 }
 624                 break;
 625         case IEEE80211_S_CAC:
 626                 /*
 627                  * Start CAC on a DFS channel.  We come here when starting
 628                  * a bss on a DFS channel (see ieee80211_create_ibss).
 629                  */
 630                 ieee80211_dfs_cac_start(vap);
 631                 break;
 632         case IEEE80211_S_RUN:
 633                 switch (ostate) {
 634                 case IEEE80211_S_INIT:
 635                         /*
 636                          * Already have a channel; bypass the
 637                          * scan and startup immediately.
 638                          * Note that ieee80211_create_ibss will call
 639                          * back to do a RUN->RUN state change.
 640                          */
 641                         ieee80211_create_ibss(vap,
 642                             ieee80211_ht_adjust_channel(ic,
 643                                 ic->ic_curchan, vap->iv_flags_ht));
 644                         /* NB: iv_bss is changed on return */
 645                         break;
 646                 case IEEE80211_S_CAC:
 647                         /*
 648                          * NB: This is the normal state change when CAC
 649                          * expires and no radar was detected; no need to
 650                          * clear the CAC timer as it's already expired.
 651                          */
 652                         /* fall thru... */
 653                 case IEEE80211_S_CSA:
 654 #if 0
 655                         /*
 656                          * Shorten inactivity timer of associated stations
 657                          * to weed out sta's that don't follow a CSA.
 658                          */
 659                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 660 #endif
 661                         /*
 662                          * Update bss node channel to reflect where
 663                          * we landed after CSA.
 664                          */
 665                         ieee80211_node_set_chan(vap->iv_bss,
 666                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 667                                 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
 668                         /* XXX bypass debug msgs */
 669                         break;
 670                 case IEEE80211_S_SCAN:
 671                 case IEEE80211_S_RUN:
 672 #ifdef IEEE80211_DEBUG
 673                         if (ieee80211_msg_debug(vap)) {
 674                                 struct ieee80211_node *ni = vap->iv_bss;
 675                                 ieee80211_note(vap,
 676                                     "synchronized with %s meshid ",
 677                                     ether_sprintf(ni->ni_meshid));
 678                                 ieee80211_print_essid(ni->ni_meshid,
 679                                     ni->ni_meshidlen);
 680                                 /* XXX MCS/HT */
 681                                 printf(" channel %d\n",
 682                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
 683                         }
 684 #endif
 685                         break;
 686                 default:
 687                         break;
 688                 }
 689                 ieee80211_node_authorize(vap->iv_bss);
 690                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 691                     mesh_rt_cleanup_cb, vap);
 692                 break;
 693         default:
 694                 break;
 695         }
 696         /* NB: ostate not nstate */
 697         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
 698         return 0;
 699 }
 700
 701 static void
 702 mesh_rt_cleanup_cb(void *arg)
 703 {
 704         struct ieee80211vap *vap = arg;
 705         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 706
 707         mesh_rt_flush_invalid(vap);
 708         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 709             mesh_rt_cleanup_cb, vap);
 710 }
 711
 712
 713 /*
 714  * Helper function to note the Mesh Peer Link FSM change.
 715  */
 716 static void
 717 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
 718 {
 719         struct ieee80211vap *vap = ni->ni_vap;
 720         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 721 #ifdef IEEE80211_DEBUG
 722         static const char *meshlinkstates[] = {
 723                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
 724                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
 725                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
 726                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
 727                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
 728                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
 729         };
 730 #endif
 731         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
 732             ni, "peer link: %s -> %s",
 733             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
 734
 735         /* track neighbor count */
 736         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
 737             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 738                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
 739                 ms->ms_neighbors++;
 740                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 741         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
 742             state != IEEE80211_NODE_MESH_ESTABLISHED) {
 743                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
 744                 ms->ms_neighbors--;
 745                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 746         }
 747         ni->ni_mlstate = state;
 748         switch (state) {
 749         case IEEE80211_NODE_MESH_HOLDING:
 750                 ms->ms_ppath->mpp_peerdown(ni);
 751                 break;
 752         case IEEE80211_NODE_MESH_ESTABLISHED:
 753                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
 754                 break;
 755         default:
 756                 break;
 757         }
 758 }
 759
 760 /*
 761  * Helper function to generate a unique local ID required for mesh
 762  * peer establishment.
 763  */
 764 static void
 765 mesh_checkid(void *arg, struct ieee80211_node *ni)
 766 {
 767         uint16_t *r = arg;
 768
 769         if (*r == ni->ni_mllid)
 770                 *(uint16_t *)arg = 0;
 771 }
 772
 773 static uint32_t
 774 mesh_generateid(struct ieee80211vap *vap)
 775 {
 776         int maxiter = 4;
 777         uint16_t r;
 778
 779         do {
 780                 get_random_bytes(&r, 2);
 781                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
 782                 maxiter--;
 783         } while (r == 0 && maxiter > 0);
 784         return r;
 785 }
 786
 787 /*
 788  * Verifies if we already received this packet by checking its
 789  * sequence number.
 790  * Returns 0 if the frame is to be accepted, 1 otherwise.
 791  */
 792 static int
 793 mesh_checkpseq(struct ieee80211vap *vap,
 794     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
 795 {
 796         struct ieee80211_mesh_route *rt;
 797
 798         rt = ieee80211_mesh_rt_find(vap, source);
 799         if (rt == NULL) {
 800                 rt = ieee80211_mesh_rt_add(vap, source);
 801                 if (rt == NULL) {
 802                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 803                             "%s", "add mcast route failed");
 804                         vap->iv_stats.is_mesh_rtaddfailed++;
 805                         return 1;
 806                 }
 807                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 808                     "add mcast route, mesh seqno %d", seq);
 809                 rt->rt_lastmseq = seq;
 810                 return 0;
 811         }
 812         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
 813                 return 1;
 814         } else {
 815                 rt->rt_lastmseq = seq;
 816                 return 0;
 817         }
 818 }
 819
 820 /*
 821  * Iterate the routing table and locate the next hop.
 822  */
 823 static struct ieee80211_node *
 824 mesh_find_txnode(struct ieee80211vap *vap,
 825     const uint8_t dest[IEEE80211_ADDR_LEN])
 826 {
 827         struct ieee80211_mesh_route *rt;
 828
 829         rt = ieee80211_mesh_rt_find(vap, dest);
 830         if (rt == NULL)
 831                 return NULL;
 832         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0 ||
 833             (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY)) {
 834                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 835                     "%s: !valid or proxy, flags 0x%x", __func__, rt->rt_flags);
 836                 /* XXX stat */
 837                 return NULL;
 838         }
 839         return ieee80211_find_txnode(vap, rt->rt_nexthop);
 840 }
 841
 842 /*
 843  * Forward the specified frame.
 844  * Decrement the TTL and set TA to our MAC address.
 845  */
 846 static void
 847 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
 848     const struct ieee80211_meshcntl *mc)
 849 {
 850         struct ieee80211com *ic = vap->iv_ic;
 851         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 852         struct ifnet *ifp = vap->iv_ifp;
 853         struct ifnet *parent = ic->ic_ifp;
 854         const struct ieee80211_frame *wh =
 855             mtod(m, const struct ieee80211_frame *);
 856         struct mbuf *mcopy;
 857         struct ieee80211_meshcntl *mccopy;
 858         struct ieee80211_frame *whcopy;
 859         struct ieee80211_node *ni;
 860         int err;
 861
 862         if (mc->mc_ttl == 0) {
 863                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 864                     "%s", "frame not fwd'd, ttl 0");
 865                 vap->iv_stats.is_mesh_fwd_ttl++;
 866                 return;
 867         }
 868         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
 869                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 870                     "%s", "frame not fwd'd, fwding disabled");
 871                 vap->iv_stats.is_mesh_fwd_disabled++;
 872                 return;
 873         }
 874         mcopy = m_dup(m, M_DONTWAIT);
 875         if (mcopy == NULL) {
 876                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 877                     "%s", "frame not fwd'd, cannot dup");
 878                 vap->iv_stats.is_mesh_fwd_nobuf++;
 879                 ifp->if_oerrors++;
 880                 return;
 881         }
 882         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
 883             sizeof(struct ieee80211_meshcntl));
 884         if (mcopy == NULL) {
 885                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 886                     "%s", "frame not fwd'd, too short");
 887                 vap->iv_stats.is_mesh_fwd_tooshort++;
 888                 ifp->if_oerrors++;
 889                 m_freem(mcopy);
 890                 return;
 891         }
 892         whcopy = mtod(mcopy, struct ieee80211_frame *);
 893         mccopy = (struct ieee80211_meshcntl *)
 894             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
 895         /* XXX clear other bits? */
 896         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
 897         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
 898         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 899                 ni = ieee80211_ref_node(vap->iv_bss);
 900                 mcopy->m_flags |= M_MCAST;
 901         } else {
 902                 ni = mesh_find_txnode(vap, whcopy->i_addr3);
 903                 if (ni == NULL) {
 904                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
 905                             "%s", "frame not fwd'd, no path");
 906                         vap->iv_stats.is_mesh_fwd_nopath++;
 907                         m_freem(mcopy);
 908                         return;
 909                 }
 910                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
 911         }
 912         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
 913         mccopy->mc_ttl--;
 914
 915         /* XXX calculate priority so drivers can find the tx queue */
 916         M_WME_SETAC(mcopy, WME_AC_BE);
 917
 918         /* XXX do we know m_nextpkt is NULL? */
 919         mcopy->m_pkthdr.rcvif = (void *) ni;
 920         err = parent->if_transmit(parent, mcopy);
 921         if (err != 0) {
 922                 /* NB: IFQ_HANDOFF reclaims mbuf */
 923                 ieee80211_free_node(ni);
 924         } else {
 925                 ifp->if_opackets++;
 926         }
 927 }
 928
 929 static struct mbuf *
 930 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
 931 {
 932 #define WHDIR(wh) ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
 933         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
 934                   sizeof(struct ieee80211_meshcntl_ae11)];
 935         const struct ieee80211_qosframe_addr4 *wh;
 936         const struct ieee80211_meshcntl_ae10 *mc;
 937         struct ether_header *eh;
 938         struct llc *llc;
 939         int ae;
 940
 941         if (m->m_len < hdrlen + sizeof(*llc) &&
 942             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
 943                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
 944                     "discard data frame: %s", "m_pullup failed");
 945                 vap->iv_stats.is_rx_tooshort++;
 946                 return NULL;
 947         }
 948         memcpy(b, mtod(m, caddr_t), hdrlen);
 949         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
 950         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
 951         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
 952                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
 953             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
 954
 955         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
 956         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
 957             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
 958             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
 959             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
 960             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
 961               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
 962                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
 963                 llc = NULL;
 964         } else {
 965                 m_adj(m, hdrlen - sizeof(*eh));
 966         }
 967         eh = mtod(m, struct ether_header *);
 968         ae = mc->mc_flags & 3;
 969         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
 970                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
 971                 if (ae == 0) {
 972                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
 973                 } else if (ae == 1) {
 974                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr4);
 975                 } else {
 976                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 977                             (const struct ieee80211_frame *)wh, NULL,
 978                             "bad AE %d", ae);
 979                         vap->iv_stats.is_mesh_badae++;
 980                         m_freem(m);
 981                         return NULL;
 982                 }
 983         } else {
 984                 if (ae == 0) {
 985                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
 986                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
 987                 } else if (ae == 2) {
 988                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr4);
 989                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr5);
 990                 } else {
 991                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 992                             (const struct ieee80211_frame *)wh, NULL,
 993                             "bad AE %d", ae);
 994                         vap->iv_stats.is_mesh_badae++;
 995                         m_freem(m);
 996                         return NULL;
 997                 }
 998         }
 999 #ifdef ALIGNED_POINTER
1000         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1001                 m = ieee80211_realign(vap, m, sizeof(*eh));
1002                 if (m == NULL)
1003                         return NULL;
1004         }
1005 #endif /* ALIGNED_POINTER */
1006         if (llc != NULL) {
1007                 eh = mtod(m, struct ether_header *);
1008                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1009         }
1010         return m;
1011 #undef WDIR
1012 }
1013
1014 /*
1015  * Return non-zero if the unicast mesh data frame should be processed
1016  * locally.  Frames that are not proxy'd have our address, otherwise
1017  * we need to consult the routing table to look for a proxy entry.
1018  */
1019 static __inline int
1020 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1021     const struct ieee80211_meshcntl *mc)
1022 {
1023         int ae = mc->mc_flags & 3;
1024
1025         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1026             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1027         KASSERT(ae == 0 || ae == 2, ("bad AE %d", ae));
1028         if (ae == 2) {                          /* ucast w/ proxy */
1029                 const struct ieee80211_meshcntl_ae10 *mc10 =
1030                     (const struct ieee80211_meshcntl_ae10 *) mc;
1031                 struct ieee80211_mesh_route *rt =
1032                     ieee80211_mesh_rt_find(vap, mc10->mc_addr4);
1033                 /* check for proxy route to ourself */
1034                 return (rt != NULL &&
1035                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1036         } else                                  /* ucast w/o proxy */
1037                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1038 }
1039
1040 static int
1041 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
1042 {
1043 #define HAS_SEQ(type)   ((type & 0x4) == 0)
1044         struct ieee80211vap *vap = ni->ni_vap;
1045         struct ieee80211com *ic = ni->ni_ic;
1046         struct ifnet *ifp = vap->iv_ifp;
1047         struct ieee80211_frame *wh;
1048         const struct ieee80211_meshcntl *mc;
1049         int hdrspace, meshdrlen, need_tap;
1050         uint8_t dir, type, subtype, qos;
1051         uint32_t seq;
1052         uint8_t *addr;
1053         ieee80211_seq rxseq;
1054
1055         KASSERT(ni != NULL, ("null node"));
1056         ni->ni_inact = ni->ni_inact_reload;
1057
1058         need_tap = 1;                   /* mbuf need to be tapped. */
1059         type = -1;                      /* undefined */
1060
1061         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1062                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1063                     ni->ni_macaddr, NULL,
1064                     "too short (1): len %u", m->m_pkthdr.len);
1065                 vap->iv_stats.is_rx_tooshort++;
1066                 goto out;
1067         }
1068         /*
1069          * Bit of a cheat here, we use a pointer for a 3-address
1070          * frame format but don't reference fields past outside
1071          * ieee80211_frame_min w/o first validating the data is
1072          * present.
1073         */
1074         wh = mtod(m, struct ieee80211_frame *);
1075
1076         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1077             IEEE80211_FC0_VERSION_0) {
1078                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1079                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1080                 vap->iv_stats.is_rx_badversion++;
1081                 goto err;
1082         }
1083         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1084         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1085         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1086         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1087                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1088                 ni->ni_noise = nf;
1089                 if (HAS_SEQ(type)) {
1090                         uint8_t tid = ieee80211_gettid(wh);
1091
1092                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
1093                             TID_TO_WME_AC(tid) >= WME_AC_VI)
1094                                 ic->ic_wme.wme_hipri_traffic++;
1095                         rxseq = le16toh(*(uint16_t *)wh->i_seq);
1096                         if (! ieee80211_check_rxseq(ni, wh)) {
1097                                 /* duplicate, discard */
1098                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1099                                     wh->i_addr1, "duplicate",
1100                                     "seqno <%u,%u> fragno <%u,%u> tid %u",
1101                                     rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
1102                                     ni->ni_rxseqs[tid] >>
1103                                     IEEE80211_SEQ_SEQ_SHIFT,
1104                                     rxseq & IEEE80211_SEQ_FRAG_MASK,
1105                                     ni->ni_rxseqs[tid] &
1106                                     IEEE80211_SEQ_FRAG_MASK,
1107                                     tid);
1108                                 vap->iv_stats.is_rx_dup++;
1109                                 IEEE80211_NODE_STAT(ni, rx_dup);
1110                                 goto out;
1111                         }
1112                         ni->ni_rxseqs[tid] = rxseq;
1113                 }
1114         }
1115 #ifdef IEEE80211_DEBUG
1116         /*
1117          * It's easier, but too expensive, to simulate different mesh
1118          * topologies by consulting the ACL policy very early, so do this
1119          * only under DEBUG.
1120          *
1121          * NB: this check is also done upon peering link initiation.
1122          */
1123         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh->i_addr2)) {
1124                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1125                     wh, NULL, "%s", "disallowed by ACL");
1126                 vap->iv_stats.is_rx_acl++;
1127                 goto out;
1128         }
1129 #endif
1130         switch (type) {
1131         case IEEE80211_FC0_TYPE_DATA:
1132                 if (ni == vap->iv_bss)
1133                         goto out;
1134                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1135                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1136                             ni->ni_macaddr, NULL,
1137                             "peer link not yet established (%d)",
1138                             ni->ni_mlstate);
1139                         vap->iv_stats.is_mesh_nolink++;
1140                         goto out;
1141                 }
1142                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1143                     dir != IEEE80211_FC1_DIR_DSTODS) {
1144                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1145                             wh, "data", "incorrect dir 0x%x", dir);
1146                         vap->iv_stats.is_rx_wrongdir++;
1147                         goto err;
1148                 }
1149                 /* pull up enough to get to the mesh control */
1150                 hdrspace = ieee80211_hdrspace(ic, wh);
1151                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1152                     (m = m_pullup(m, hdrspace +
1153                         sizeof(struct ieee80211_meshcntl))) == NULL) {
1154                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1155                             ni->ni_macaddr, NULL,
1156                             "data too short: expecting %u", hdrspace);
1157                         vap->iv_stats.is_rx_tooshort++;
1158                         goto out;               /* XXX */
1159                 }
1160                 /*
1161                  * Now calculate the full extent of the headers. Note
1162                  * mesh_decap will pull up anything we didn't get
1163                  * above when it strips the 802.11 headers.
1164                  */
1165                 mc = (const struct ieee80211_meshcntl *)
1166                     (mtod(m, const uint8_t *) + hdrspace);
1167                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1168                     (mc->mc_flags & 3) * IEEE80211_ADDR_LEN;
1169                 hdrspace += meshdrlen;
1170                 seq = LE_READ_4(mc->mc_seq);
1171                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1172                         addr = wh->i_addr3;
1173                 else
1174                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1175                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1176                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1177                             addr, "data", "%s", "not to me");
1178                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1179                         goto out;
1180                 }
1181                 if (mesh_checkpseq(vap, addr, seq) != 0) {
1182                         vap->iv_stats.is_rx_dup++;
1183                         goto out;
1184                 }
1185
1186                 /*
1187                  * Potentially forward packet.  See table s36 (p140)
1188                  * for the rules.  XXX tap fwd'd packets not for us?
1189                  */
1190                 if (dir == IEEE80211_FC1_DIR_FROMDS ||
1191                     !mesh_isucastforme(vap, wh, mc)) {
1192                         mesh_forward(vap, m, mc);
1193                         if (dir == IEEE80211_FC1_DIR_DSTODS)
1194                                 goto out;
1195                         /* NB: fall thru to deliver mcast frames locally */
1196                 }
1197
1198                 /*
1199                  * Save QoS bits for use below--before we strip the header.
1200                  */
1201                 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
1202                         qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
1203                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
1204                             ((struct ieee80211_qosframe *)wh)->i_qos[0];
1205                 } else
1206                         qos = 0;
1207                 /*
1208                  * Next up, any fragmentation.
1209                  */
1210                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1211                         m = ieee80211_defrag(ni, m, hdrspace);
1212                         if (m == NULL) {
1213                                 /* Fragment dropped or frame not complete yet */
1214                                 goto out;
1215                         }
1216                 }
1217                 wh = NULL;              /* no longer valid, catch any uses */
1218
1219                 if (ieee80211_radiotap_active_vap(vap))
1220                         ieee80211_radiotap_rx(vap, m);
1221                 need_tap = 0;
1222
1223                 /*
1224                  * Finally, strip the 802.11 header.
1225                  */
1226                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1227                 if (m == NULL) {
1228                         /* XXX mask bit to check for both */
1229                         /* don't count Null data frames as errors */
1230                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1231                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1232                                 goto out;
1233                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1234                             ni->ni_macaddr, "data", "%s", "decap error");
1235                         vap->iv_stats.is_rx_decap++;
1236                         IEEE80211_NODE_STAT(ni, rx_decap);
1237                         goto err;
1238                 }
1239                 if (qos & IEEE80211_QOS_AMSDU) {
1240                         m = ieee80211_decap_amsdu(ni, m);
1241                         if (m == NULL)
1242                                 return IEEE80211_FC0_TYPE_DATA;
1243                 }
1244                 ieee80211_deliver_data(vap, ni, m);
1245                 return type;
1246         case IEEE80211_FC0_TYPE_MGT:
1247                 vap->iv_stats.is_rx_mgmt++;
1248                 IEEE80211_NODE_STAT(ni, rx_mgmt);
1249                 if (dir != IEEE80211_FC1_DIR_NODS) {
1250                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1251                             wh, "mgt", "incorrect dir 0x%x", dir);
1252                         vap->iv_stats.is_rx_wrongdir++;
1253                         goto err;
1254                 }
1255                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1256                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1257                             ni->ni_macaddr, "mgt", "too short: len %u",
1258                             m->m_pkthdr.len);
1259                         vap->iv_stats.is_rx_tooshort++;
1260                         goto out;
1261                 }
1262 #ifdef IEEE80211_DEBUG
1263                 if ((ieee80211_msg_debug(vap) &&
1264                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1265                     ieee80211_msg_dumppkts(vap)) {
1266                         if_printf(ifp, "received %s from %s rssi %d\n",
1267                             ieee80211_mgt_subtype_name[subtype >>
1268                             IEEE80211_FC0_SUBTYPE_SHIFT],
1269                             ether_sprintf(wh->i_addr2), rssi);
1270                 }
1271 #endif
1272                 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1273                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1274                             wh, NULL, "%s", "WEP set but not permitted");
1275                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1276                         goto out;
1277                 }
1278                 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
1279                 goto out;
1280         case IEEE80211_FC0_TYPE_CTL:
1281                 vap->iv_stats.is_rx_ctl++;
1282                 IEEE80211_NODE_STAT(ni, rx_ctrl);
1283                 goto out;
1284         default:
1285                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1286                     wh, "bad", "frame type 0x%x", type);
1287                 /* should not come here */
1288                 break;
1289         }
1290 err:
1291         ifp->if_ierrors++;
1292 out:
1293         if (m != NULL) {
1294                 if (need_tap && ieee80211_radiotap_active_vap(vap))
1295                         ieee80211_radiotap_rx(vap, m);
1296                 m_freem(m);
1297         }
1298         return type;
1299 }
1300
1301 static void
1302 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1303     int rssi, int nf)
1304 {
1305         struct ieee80211vap *vap = ni->ni_vap;
1306         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1307         struct ieee80211com *ic = ni->ni_ic;
1308         struct ieee80211_frame *wh;
1309         uint8_t *frm, *efrm;
1310
1311         wh = mtod(m0, struct ieee80211_frame *);
1312         frm = (uint8_t *)&wh[1];
1313         efrm = mtod(m0, uint8_t *) + m0->m_len;
1314         switch (subtype) {
1315         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1316         case IEEE80211_FC0_SUBTYPE_BEACON:
1317         {
1318                 struct ieee80211_scanparams scan;
1319                 /*
1320                  * We process beacon/probe response
1321                  * frames to discover neighbors.
1322                  */
1323                 if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
1324                         return;
1325                 /*
1326                  * Count frame now that we know it's to be processed.
1327                  */
1328                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1329                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
1330                         IEEE80211_NODE_STAT(ni, rx_beacons);
1331                 } else
1332                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1333                 /*
1334                  * If scanning, just pass information to the scan module.
1335                  */
1336                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1337                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1338                                 /*
1339                                  * Actively scanning a channel marked passive;
1340                                  * send a probe request now that we know there
1341                                  * is 802.11 traffic present.
1342                                  *
1343                                  * XXX check if the beacon we recv'd gives
1344                                  * us what we need and suppress the probe req
1345                                  */
1346                                 ieee80211_probe_curchan(vap, 1);
1347                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1348                         }
1349                         ieee80211_add_scan(vap, &scan, wh,
1350                             subtype, rssi, nf);
1351                         return;
1352                 }
1353
1354                 /* The rest of this code assumes we are running */
1355                 if (vap->iv_state != IEEE80211_S_RUN)
1356                         return;
1357                 /*
1358                  * Ignore non-mesh STAs.
1359                  */
1360                 if ((scan.capinfo &
1361                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1362                     scan.meshid == NULL || scan.meshconf == NULL) {
1363                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1364                             wh, "beacon", "%s", "not a mesh sta");
1365                         vap->iv_stats.is_mesh_wrongmesh++;
1366                         return;
1367                 }
1368                 /*
1369                  * Ignore STAs for other mesh networks.
1370                  */
1371                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1372                     mesh_verify_meshconf(vap, scan.meshconf)) {
1373                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1374                             wh, "beacon", "%s", "not for our mesh");
1375                         vap->iv_stats.is_mesh_wrongmesh++;
1376                         return;
1377                 }
1378                 /*
1379                  * Peer only based on the current ACL policy.
1380                  */
1381                 if (vap->iv_acl != NULL &&
1382                     !vap->iv_acl->iac_check(vap, wh->i_addr2)) {
1383                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1384                             wh, NULL, "%s", "disallowed by ACL");
1385                         vap->iv_stats.is_rx_acl++;
1386                         return;
1387                 }
1388                 /*
1389                  * Do neighbor discovery.
1390                  */
1391                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1392                         /*
1393                          * Create a new entry in the neighbor table.
1394                          */
1395                         ni = ieee80211_add_neighbor(vap, wh, &scan);
1396                 }
1397                 /*
1398                  * Automatically peer with discovered nodes if possible.
1399                  * XXX backoff on repeated failure
1400                  */
1401                 if (ni != vap->iv_bss &&
1402                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP) &&
1403                     ni->ni_mlstate == IEEE80211_NODE_MESH_IDLE) {
1404                         uint16_t args[1];
1405
1406                         ni->ni_mlpid = mesh_generateid(vap);
1407                         if (ni->ni_mlpid == 0)
1408                                 return;
1409                         mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1410                         args[0] = ni->ni_mlpid;
1411                         ieee80211_send_action(ni,
1412                             IEEE80211_ACTION_CAT_MESHPEERING,
1413                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
1414                         ni->ni_mlrcnt = 0;
1415                         mesh_peer_timeout_setup(ni);
1416                 }
1417                 break;
1418         }
1419         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1420         {
1421                 uint8_t *ssid, *meshid, *rates, *xrates;
1422                 uint8_t *sfrm;
1423
1424                 if (vap->iv_state != IEEE80211_S_RUN) {
1425                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1426                             wh, NULL, "wrong state %s",
1427                             ieee80211_state_name[vap->iv_state]);
1428                         vap->iv_stats.is_rx_mgtdiscard++;
1429                         return;
1430                 }
1431                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1432                         /* frame must be directed */
1433                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1434                             wh, NULL, "%s", "not unicast");
1435                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
1436                         return;
1437                 }
1438                 /*
1439                  * prreq frame format
1440                  *      [tlv] ssid
1441                  *      [tlv] supported rates
1442                  *      [tlv] extended supported rates
1443                  *      [tlv] mesh id
1444                  */
1445                 ssid = meshid = rates = xrates = NULL;
1446                 sfrm = frm;
1447                 while (efrm - frm > 1) {
1448                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1449                         switch (*frm) {
1450                         case IEEE80211_ELEMID_SSID:
1451                                 ssid = frm;
1452                                 break;
1453                         case IEEE80211_ELEMID_RATES:
1454                                 rates = frm;
1455                                 break;
1456                         case IEEE80211_ELEMID_XRATES:
1457                                 xrates = frm;
1458                                 break;
1459                         case IEEE80211_ELEMID_MESHID:
1460                                 meshid = frm;
1461                                 break;
1462                         }
1463                         frm += frm[1] + 2;
1464                 }
1465                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1466                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1467                 if (xrates != NULL)
1468                         IEEE80211_VERIFY_ELEMENT(xrates,
1469                             IEEE80211_RATE_MAXSIZE - rates[1], return);
1470                 if (meshid != NULL) {
1471                         IEEE80211_VERIFY_ELEMENT(meshid,
1472                             IEEE80211_MESHID_LEN, return);
1473                         /* NB: meshid, not ssid */
1474                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
1475                 }
1476
1477                 /* XXX find a better class or define it's own */
1478                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1479                     "%s", "recv probe req");
1480                 /*
1481                  * Some legacy 11b clients cannot hack a complete
1482                  * probe response frame.  When the request includes
1483                  * only a bare-bones rate set, communicate this to
1484                  * the transmit side.
1485                  */
1486                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
1487                 break;
1488         }
1489
1490         case IEEE80211_FC0_SUBTYPE_ACTION:
1491         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
1492                 if (ni == vap->iv_bss) {
1493                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1494                             wh, NULL, "%s", "unknown node");
1495                         vap->iv_stats.is_rx_mgtdiscard++;
1496                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
1497                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1498                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1499                             wh, NULL, "%s", "not for us");
1500                         vap->iv_stats.is_rx_mgtdiscard++;
1501                 } else if (vap->iv_state != IEEE80211_S_RUN) {
1502                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1503                             wh, NULL, "wrong state %s",
1504                             ieee80211_state_name[vap->iv_state]);
1505                         vap->iv_stats.is_rx_mgtdiscard++;
1506                 } else {
1507                         if (ieee80211_parse_action(ni, m0) == 0)
1508                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
1509                 }
1510                 break;
1511
1512         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1513         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
1514         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
1515         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
1516         case IEEE80211_FC0_SUBTYPE_ATIM:
1517         case IEEE80211_FC0_SUBTYPE_DISASSOC:
1518         case IEEE80211_FC0_SUBTYPE_AUTH:
1519         case IEEE80211_FC0_SUBTYPE_DEAUTH:
1520                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1521                     wh, NULL, "%s", "not handled");
1522                 vap->iv_stats.is_rx_mgtdiscard++;
1523                 break;
1524
1525         default:
1526                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1527                     wh, "mgt", "subtype 0x%x not handled", subtype);
1528                 vap->iv_stats.is_rx_badsubtype++;
1529                 break;
1530         }
1531 }
1532
1533 static void
1534 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
1535 {
1536
1537         switch (subtype) {
1538         case IEEE80211_FC0_SUBTYPE_BAR:
1539                 ieee80211_recv_bar(ni, m);
1540                 break;
1541         }
1542 }
1543
1544 /*
1545  * Parse meshpeering action ie's for open+confirm frames; the
1546  * important bits are returned in the supplied structure.
1547  */
1548 static const struct ieee80211_meshpeer_ie *
1549 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
1550         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
1551         const uint8_t *frm, const uint8_t *efrm,
1552         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
1553 {
1554         struct ieee80211vap *vap = ni->ni_vap;
1555         const struct ieee80211_meshpeer_ie *mpie;
1556         const uint8_t *meshid, *meshconf, *meshpeer;
1557
1558         meshid = meshconf = meshpeer = NULL;
1559         while (efrm - frm > 1) {
1560                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
1561                 switch (*frm) {
1562                 case IEEE80211_ELEMID_MESHID:
1563                         meshid = frm;
1564                         break;
1565                 case IEEE80211_ELEMID_MESHCONF:
1566                         meshconf = frm;
1567                         break;
1568                 case IEEE80211_ELEMID_MESHPEER:
1569                         meshpeer = frm;
1570                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
1571                         memset(mp, 0, sizeof(*mp));
1572                         mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid);
1573                         /* NB: peer link ID is optional on these frames */
1574                         if (subtype == IEEE80211_MESH_PEER_LINK_CLOSE &&
1575                             mpie->peer_len == 8) {
1576                                 mp->peer_linkid = 0;
1577                                 mp->peer_rcode = LE_READ_2(&mpie->peer_linkid);
1578                         } else {
1579                                 mp->peer_linkid = LE_READ_2(&mpie->peer_linkid);
1580                                 mp->peer_rcode = LE_READ_2(&mpie->peer_rcode);
1581                         }
1582                         break;
1583                 }
1584                 frm += frm[1] + 2;
1585         }
1586
1587         /*
1588          * Verify the contents of the frame. Action frames with
1589          * close subtype don't have a Mesh Configuration IE.
1590          * If if fails validation, close the peer link.
1591          */
1592         KASSERT(meshpeer != NULL &&
1593             subtype != IEEE80211_ACTION_MESHPEERING_CLOSE,
1594             ("parsing close action"));
1595
1596         if (mesh_verify_meshid(vap, meshid) ||
1597             mesh_verify_meshpeer(vap, subtype, meshpeer) ||
1598             mesh_verify_meshconf(vap, meshconf)) {
1599                 uint16_t args[3];
1600
1601                 IEEE80211_DISCARD(vap,
1602                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1603                     wh, NULL, "%s", "not for our mesh");
1604                 vap->iv_stats.is_rx_mgtdiscard++;
1605                 switch (ni->ni_mlstate) {
1606                 case IEEE80211_NODE_MESH_IDLE:
1607                 case IEEE80211_NODE_MESH_ESTABLISHED:
1608                 case IEEE80211_NODE_MESH_HOLDING:
1609                         /* ignore */
1610                         break;
1611                 case IEEE80211_NODE_MESH_OPENSNT:
1612                 case IEEE80211_NODE_MESH_OPENRCV:
1613                 case IEEE80211_NODE_MESH_CONFIRMRCV:
1614                         args[0] = ni->ni_mlpid;
1615                         args[1] = ni->ni_mllid;
1616                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1617                         ieee80211_send_action(ni,
1618                             IEEE80211_ACTION_CAT_MESHPEERING,
1619                             IEEE80211_ACTION_MESHPEERING_CLOSE,
1620                             args);
1621                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1622                         mesh_peer_timeout_setup(ni);
1623                         break;
1624                 }
1625                 return NULL;
1626         }
1627         return (const struct ieee80211_meshpeer_ie *) mp;
1628 }
1629
1630 static int
1631 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
1632         const struct ieee80211_frame *wh,
1633         const uint8_t *frm, const uint8_t *efrm)
1634 {
1635         struct ieee80211vap *vap = ni->ni_vap;
1636         struct ieee80211_meshpeer_ie ie;
1637         const struct ieee80211_meshpeer_ie *meshpeer;
1638         uint16_t args[3];
1639
1640         /* +2+2 for action + code + capabilites */
1641         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
1642             IEEE80211_ACTION_MESHPEERING_OPEN);
1643         if (meshpeer == NULL) {
1644                 return 0;
1645         }
1646
1647         /* XXX move up */
1648         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1649             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
1650
1651         switch (ni->ni_mlstate) {
1652         case IEEE80211_NODE_MESH_IDLE:
1653                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
1654                 ni->ni_mllid = meshpeer->peer_llinkid;
1655                 ni->ni_mlpid = mesh_generateid(vap);
1656                 if (ni->ni_mlpid == 0)
1657                         return 0;               /* XXX */
1658                 args[0] = ni->ni_mlpid;
1659                 /* Announce we're open too... */
1660                 ieee80211_send_action(ni,
1661                     IEEE80211_ACTION_CAT_MESHPEERING,
1662                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
1663                 /* ...and confirm the link. */
1664                 args[0] = ni->ni_mlpid;
1665                 args[1] = ni->ni_mllid;
1666                 ieee80211_send_action(ni,
1667                     IEEE80211_ACTION_CAT_MESHPEERING,
1668                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
1669                     args);
1670                 mesh_peer_timeout_setup(ni);
1671                 break;
1672         case IEEE80211_NODE_MESH_OPENRCV:
1673                 /* Wrong Link ID */
1674                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
1675                         args[0] = ni->ni_mllid;
1676                         args[1] = ni->ni_mlpid;
1677                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1678                         ieee80211_send_action(ni,
1679                             IEEE80211_ACTION_CAT_MESHPEERING,
1680                             IEEE80211_ACTION_MESHPEERING_CLOSE,
1681                             args);
1682                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1683                         mesh_peer_timeout_setup(ni);
1684                         break;
1685                 }
1686                 /* Duplicate open, confirm again. */
1687                 args[0] = ni->ni_mlpid;
1688                 args[1] = ni->ni_mllid;
1689                 ieee80211_send_action(ni,
1690                     IEEE80211_ACTION_CAT_MESHPEERING,
1691                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
1692                     args);
1693                 break;
1694         case IEEE80211_NODE_MESH_OPENSNT:
1695                 ni->ni_mllid = meshpeer->peer_llinkid;
1696                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
1697                 args[0] = ni->ni_mlpid;
1698                 args[1] = ni->ni_mllid;
1699                 ieee80211_send_action(ni,
1700                     IEEE80211_ACTION_CAT_MESHPEERING,
1701                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
1702                     args);
1703                 /* NB: don't setup/clear any timeout */
1704                 break;
1705         case IEEE80211_NODE_MESH_CONFIRMRCV:
1706                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
1707                     ni->ni_mllid != meshpeer->peer_llinkid) {
1708                         args[0] = ni->ni_mlpid;
1709                         args[1] = ni->ni_mllid;
1710                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1711                         ieee80211_send_action(ni,
1712                             IEEE80211_ACTION_CAT_MESHPEERING,
1713                             IEEE80211_ACTION_MESHPEERING_CLOSE,
1714                             args);
1715                         mesh_linkchange(ni,
1716                             IEEE80211_NODE_MESH_HOLDING);
1717                         mesh_peer_timeout_setup(ni);
1718                         break;
1719                 }
1720                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
1721                 ni->ni_mllid = meshpeer->peer_llinkid;
1722                 args[0] = ni->ni_mlpid;
1723                 args[1] = ni->ni_mllid;
1724                 ieee80211_send_action(ni,
1725                     IEEE80211_ACTION_CAT_MESHPEERING,
1726                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
1727                     args);
1728                 mesh_peer_timeout_stop(ni);
1729                 break;
1730         case IEEE80211_NODE_MESH_ESTABLISHED:
1731                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
1732                         args[0] = ni->ni_mllid;
1733                         args[1] = ni->ni_mlpid;
1734                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1735                         ieee80211_send_action(ni,
1736                             IEEE80211_ACTION_CAT_MESHPEERING,
1737                             IEEE80211_ACTION_MESHPEERING_CLOSE,
1738                             args);
1739                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1740                         mesh_peer_timeout_setup(ni);
1741                         break;
1742                 }
1743                 args[0] = ni->ni_mlpid;
1744                 args[1] = ni->ni_mllid;
1745                 ieee80211_send_action(ni,
1746                     IEEE80211_ACTION_CAT_MESHPEERING,
1747                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
1748                     args);
1749                 break;
1750         case IEEE80211_NODE_MESH_HOLDING:
1751                 args[0] = ni->ni_mlpid;
1752                 args[1] = meshpeer->peer_llinkid;
1753                 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
1754                 ieee80211_send_action(ni,
1755                     IEEE80211_ACTION_CAT_MESHPEERING,
1756                     IEEE80211_ACTION_MESHPEERING_CLOSE,
1757                     args);
1758                 break;
1759         }
1760         return 0;
1761 }
1762
1763 static int
1764 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
1765         const struct ieee80211_frame *wh,
1766         const uint8_t *frm, const uint8_t *efrm)
1767 {
1768         struct ieee80211vap *vap = ni->ni_vap;
1769         struct ieee80211_meshpeer_ie ie;
1770         const struct ieee80211_meshpeer_ie *meshpeer;
1771         uint16_t args[3];
1772
1773         /* +2+2+2+2 for action + code + capabilites + status code + AID */
1774         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
1775             IEEE80211_ACTION_MESHPEERING_CONFIRM);
1776         if (meshpeer == NULL) {
1777                 return 0;
1778         }
1779
1780         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1781             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
1782             meshpeer->peer_llinkid, meshpeer->peer_linkid);
1783
1784         switch (ni->ni_mlstate) {
1785         case IEEE80211_NODE_MESH_OPENRCV:
1786                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
1787                 mesh_peer_timeout_stop(ni);
1788                 break;
1789         case IEEE80211_NODE_MESH_OPENSNT:
1790                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
1791                 break;
1792         case IEEE80211_NODE_MESH_HOLDING:
1793                 args[0] = ni->ni_mlpid;
1794                 args[1] = meshpeer->peer_llinkid;
1795                 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
1796                 ieee80211_send_action(ni,
1797                     IEEE80211_ACTION_CAT_MESHPEERING,
1798                     IEEE80211_ACTION_MESHPEERING_CLOSE,
1799                     args);
1800                 break;
1801         case IEEE80211_NODE_MESH_CONFIRMRCV:
1802                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
1803                         args[0] = ni->ni_mlpid;
1804                         args[1] = ni->ni_mllid;
1805                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1806                         ieee80211_send_action(ni,
1807                             IEEE80211_ACTION_CAT_MESHPEERING,
1808                             IEEE80211_ACTION_MESHPEERING_CLOSE,
1809                             args);
1810                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1811                         mesh_peer_timeout_setup(ni);
1812                 }
1813                 break;
1814         default:
1815                 IEEE80211_DISCARD(vap,
1816                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1817                     wh, NULL, "received confirm in invalid state %d",
1818                     ni->ni_mlstate);
1819                 vap->iv_stats.is_rx_mgtdiscard++;
1820                 break;
1821         }
1822         return 0;
1823 }
1824
1825 static int
1826 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
1827         const struct ieee80211_frame *wh,
1828         const uint8_t *frm, const uint8_t *efrm)
1829 {
1830         uint16_t args[3];
1831
1832         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1833             ni, "%s", "recv PEER CLOSE");
1834
1835         switch (ni->ni_mlstate) {
1836         case IEEE80211_NODE_MESH_IDLE:
1837                 /* ignore */
1838                 break;
1839         case IEEE80211_NODE_MESH_OPENRCV:
1840         case IEEE80211_NODE_MESH_OPENSNT:
1841         case IEEE80211_NODE_MESH_CONFIRMRCV:
1842         case IEEE80211_NODE_MESH_ESTABLISHED:
1843                 args[0] = ni->ni_mlpid;
1844                 args[1] = ni->ni_mllid;
1845                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
1846                 ieee80211_send_action(ni,
1847                     IEEE80211_ACTION_CAT_MESHPEERING,
1848                     IEEE80211_ACTION_MESHPEERING_CLOSE,
1849                     args);
1850                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1851                 mesh_peer_timeout_setup(ni);
1852                 break;
1853         case IEEE80211_NODE_MESH_HOLDING:
1854                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
1855                 mesh_peer_timeout_setup(ni);
1856                 break;
1857         }
1858         return 0;
1859 }
1860
1861 /*
1862  * Link Metric handling.
1863  */
1864 static int
1865 mesh_recv_action_meshlmetric_req(struct ieee80211_node *ni,
1866         const struct ieee80211_frame *wh,
1867         const uint8_t *frm, const uint8_t *efrm)
1868 {
1869         uint32_t metric;
1870
1871         metric = mesh_airtime_calc(ni);
1872         ieee80211_send_action(ni,
1873             IEEE80211_ACTION_CAT_MESHLMETRIC,
1874             IEEE80211_ACTION_MESHLMETRIC_REP,
1875             &metric);
1876         return 0;
1877 }
1878
1879 static int
1880 mesh_recv_action_meshlmetric_rep(struct ieee80211_node *ni,
1881         const struct ieee80211_frame *wh,
1882         const uint8_t *frm, const uint8_t *efrm)
1883 {
1884         return 0;
1885 }
1886
1887 static int
1888 mesh_send_action(struct ieee80211_node *ni, struct mbuf *m)
1889 {
1890         struct ieee80211_bpf_params params;
1891
1892         memset(&params, 0, sizeof(params));
1893         params.ibp_pri = WME_AC_VO;
1894         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
1895         /* XXX ucast/mcast */
1896         params.ibp_try0 = ni->ni_txparms->maxretry;
1897         params.ibp_power = ni->ni_txpower;
1898         return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION,
1899              &params);
1900 }
1901
1902 #define ADDSHORT(frm, v) do {                   \
1903         frm[0] = (v) & 0xff;                    \
1904         frm[1] = (v) >> 8;                      \
1905         frm += 2;                               \
1906 } while (0)
1907 #define ADDWORD(frm, v) do {                    \
1908         frm[0] = (v) & 0xff;                    \
1909         frm[1] = ((v) >> 8) & 0xff;             \
1910         frm[2] = ((v) >> 16) & 0xff;            \
1911         frm[3] = ((v) >> 24) & 0xff;            \
1912         frm += 4;                               \
1913 } while (0)
1914
1915 static int
1916 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
1917         int category, int action, void *args0)
1918 {
1919         struct ieee80211vap *vap = ni->ni_vap;
1920         struct ieee80211com *ic = ni->ni_ic;
1921         uint16_t *args = args0;
1922         const struct ieee80211_rateset *rs;
1923         struct mbuf *m;
1924         uint8_t *frm;
1925
1926         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1927             "send PEER OPEN action: localid 0x%x", args[0]);
1928
1929         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1930             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
1931             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
1932         ieee80211_ref_node(ni);
1933
1934         m = ieee80211_getmgtframe(&frm,
1935             ic->ic_headroom + sizeof(struct ieee80211_frame),
1936             sizeof(uint16_t)    /* action+category */
1937             + sizeof(uint16_t)  /* capabilites */
1938             + 2 + IEEE80211_RATE_SIZE
1939             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1940             + 2 + IEEE80211_MESHID_LEN
1941             + sizeof(struct ieee80211_meshconf_ie)
1942             + sizeof(struct ieee80211_meshpeer_ie)
1943         );
1944         if (m != NULL) {
1945                 /*
1946                  * mesh peer open action frame format:
1947                  *   [1] category
1948                  *   [1] action
1949                  *   [2] capabilities
1950                  *   [tlv] rates
1951                  *   [tlv] xrates
1952                  *   [tlv] mesh id
1953                  *   [tlv] mesh conf
1954                  *   [tlv] mesh peer link mgmt
1955                  */
1956                 *frm++ = category;
1957                 *frm++ = action;
1958                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
1959                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
1960                 frm = ieee80211_add_rates(frm, rs);
1961                 frm = ieee80211_add_xrates(frm, rs);
1962                 frm = ieee80211_add_meshid(frm, vap);
1963                 frm = ieee80211_add_meshconf(frm, vap);
1964                 frm = ieee80211_add_meshpeer(frm, IEEE80211_MESH_PEER_LINK_OPEN,
1965                     args[0], 0, 0);
1966                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
1967                 return mesh_send_action(ni, m);
1968         } else {
1969                 vap->iv_stats.is_tx_nobuf++;
1970                 ieee80211_free_node(ni);
1971                 return ENOMEM;
1972         }
1973 }
1974
1975 static int
1976 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
1977         int category, int action, void *args0)
1978 {
1979         struct ieee80211vap *vap = ni->ni_vap;
1980         struct ieee80211com *ic = ni->ni_ic;
1981         uint16_t *args = args0;
1982         const struct ieee80211_rateset *rs;
1983         struct mbuf *m;
1984         uint8_t *frm;
1985
1986         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1987             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
1988             args[0], args[1]);
1989
1990         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1991             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
1992             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
1993         ieee80211_ref_node(ni);
1994
1995         m = ieee80211_getmgtframe(&frm,
1996             ic->ic_headroom + sizeof(struct ieee80211_frame),
1997             sizeof(uint16_t)    /* action+category */
1998             + sizeof(uint16_t)  /* capabilites */
1999             + sizeof(uint16_t)  /* status code */
2000             + sizeof(uint16_t)  /* AID */
2001             + 2 + IEEE80211_RATE_SIZE
2002             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2003             + 2 + IEEE80211_MESHID_LEN
2004             + sizeof(struct ieee80211_meshconf_ie)
2005             + sizeof(struct ieee80211_meshpeer_ie)
2006         );
2007         if (m != NULL) {
2008                 /*
2009                  * mesh peer confirm action frame format:
2010                  *   [1] category
2011                  *   [1] action
2012                  *   [2] capabilities
2013                  *   [2] status code
2014                  *   [2] association id (peer ID)
2015                  *   [tlv] rates
2016                  *   [tlv] xrates
2017                  *   [tlv] mesh id
2018                  *   [tlv] mesh conf
2019                  *   [tlv] mesh peer link mgmt
2020                  */
2021                 *frm++ = category;
2022                 *frm++ = action;
2023                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2024                 ADDSHORT(frm, 0);               /* status code */
2025                 ADDSHORT(frm, args[1]);         /* AID */
2026                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2027                 frm = ieee80211_add_rates(frm, rs);
2028                 frm = ieee80211_add_xrates(frm, rs);
2029                 frm = ieee80211_add_meshid(frm, vap);
2030                 frm = ieee80211_add_meshconf(frm, vap);
2031                 frm = ieee80211_add_meshpeer(frm,
2032                     IEEE80211_MESH_PEER_LINK_CONFIRM,
2033                     args[0], args[1], 0);
2034                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2035                 return mesh_send_action(ni, m);
2036         } else {
2037                 vap->iv_stats.is_tx_nobuf++;
2038                 ieee80211_free_node(ni);
2039                 return ENOMEM;
2040         }
2041 }
2042
2043 static int
2044 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2045         int category, int action, void *args0)
2046 {
2047         struct ieee80211vap *vap = ni->ni_vap;
2048         struct ieee80211com *ic = ni->ni_ic;
2049         uint16_t *args = args0;
2050         struct mbuf *m;
2051         uint8_t *frm;
2052
2053         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2054             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d",
2055             args[0], args[1], args[2]);
2056
2057         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2058             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2059             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2060         ieee80211_ref_node(ni);
2061
2062         m = ieee80211_getmgtframe(&frm,
2063             ic->ic_headroom + sizeof(struct ieee80211_frame),
2064             sizeof(uint16_t)    /* action+category */
2065             + sizeof(uint16_t)  /* reason code */
2066             + 2 + IEEE80211_MESHID_LEN
2067             + sizeof(struct ieee80211_meshpeer_ie)
2068         );
2069         if (m != NULL) {
2070                 /*
2071                  * mesh peer close action frame format:
2072                  *   [1] category
2073                  *   [1] action
2074                  *   [2] reason code
2075                  *   [tlv] mesh id
2076                  *   [tlv] mesh peer link mgmt
2077                  */
2078                 *frm++ = category;
2079                 *frm++ = action;
2080                 ADDSHORT(frm, args[2]);         /* reason code */
2081                 frm = ieee80211_add_meshid(frm, vap);
2082                 frm = ieee80211_add_meshpeer(frm,
2083                     IEEE80211_MESH_PEER_LINK_CLOSE,
2084                     args[0], args[1], args[2]);
2085                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2086                 return mesh_send_action(ni, m);
2087         } else {
2088                 vap->iv_stats.is_tx_nobuf++;
2089                 ieee80211_free_node(ni);
2090                 return ENOMEM;
2091         }
2092 }
2093
2094 static int
2095 mesh_send_action_meshlink_request(struct ieee80211_node *ni,
2096         int category, int action, void *arg0)
2097 {
2098         struct ieee80211vap *vap = ni->ni_vap;
2099         struct ieee80211com *ic = ni->ni_ic;
2100         struct mbuf *m;
2101         uint8_t *frm;
2102
2103         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2104             "%s", "send LINK METRIC REQUEST action");
2105
2106         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2107             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2108             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2109         ieee80211_ref_node(ni);
2110
2111         m = ieee80211_getmgtframe(&frm,
2112             ic->ic_headroom + sizeof(struct ieee80211_frame),
2113             sizeof(uint16_t)    /* action+category */
2114         );
2115         if (m != NULL) {
2116                 /*
2117                  * mesh link metric request
2118                  *   [1] category
2119                  *   [1] action
2120                  */
2121                 *frm++ = category;
2122                 *frm++ = action;
2123                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2124                 return mesh_send_action(ni, m);
2125         } else {
2126                 vap->iv_stats.is_tx_nobuf++;
2127                 ieee80211_free_node(ni);
2128                 return ENOMEM;
2129         }
2130 }
2131
2132 static int
2133 mesh_send_action_meshlink_reply(struct ieee80211_node *ni,
2134         int category, int action, void *args0)
2135 {
2136         struct ieee80211vap *vap = ni->ni_vap;
2137         struct ieee80211com *ic = ni->ni_ic;
2138         uint32_t *metric = args0;
2139         struct mbuf *m;
2140         uint8_t *frm;
2141
2142         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2143             "send LINK METRIC REPLY action: metric 0x%x", *metric);
2144
2145         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2146             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2147             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2148         ieee80211_ref_node(ni);
2149
2150         m = ieee80211_getmgtframe(&frm,
2151             ic->ic_headroom + sizeof(struct ieee80211_frame),
2152             sizeof(uint16_t)    /* action+category */
2153             + sizeof(struct ieee80211_meshlmetric_ie)
2154         );
2155         if (m != NULL) {
2156                 /*
2157                  * mesh link metric reply
2158                  *   [1] category
2159                  *   [1] action
2160                  *   [tlv] mesh link metric
2161                  */
2162                 *frm++ = category;
2163                 *frm++ = action;
2164                 frm = ieee80211_add_meshlmetric(frm, *metric);
2165                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2166                 return mesh_send_action(ni, m);
2167         } else {
2168                 vap->iv_stats.is_tx_nobuf++;
2169                 ieee80211_free_node(ni);
2170                 return ENOMEM;
2171         }
2172 }
2173
2174 static void
2175 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2176 {
2177         switch (ni->ni_mlstate) {
2178         case IEEE80211_NODE_MESH_HOLDING:
2179                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2180                 break;
2181         case IEEE80211_NODE_MESH_CONFIRMRCV:
2182                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2183                 break;
2184         case IEEE80211_NODE_MESH_IDLE:
2185                 ni->ni_mltval = 0;
2186                 break;
2187         default:
2188                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
2189                 break;
2190         }
2191         if (ni->ni_mltval)
2192                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2193                     mesh_peer_timeout_cb, ni);
2194 }
2195
2196 /*
2197  * Same as above but backoffs timer statisically 50%.
2198  */
2199 static void
2200 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
2201 {
2202         uint32_t r;
2203
2204         r = arc4random();
2205         ni->ni_mltval += r % ni->ni_mltval;
2206         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
2207             ni);
2208 }
2209
2210 static __inline void
2211 mesh_peer_timeout_stop(struct ieee80211_node *ni)
2212 {
2213         callout_drain(&ni->ni_mltimer);
2214 }
2215
2216 /*
2217  * Mesh Peer Link Management FSM timeout handling.
2218  */
2219 static void
2220 mesh_peer_timeout_cb(void *arg)
2221 {
2222         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
2223         uint16_t args[3];
2224
2225         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
2226             ni, "mesh link timeout, state %d, retry counter %d",
2227             ni->ni_mlstate, ni->ni_mlrcnt);
2228
2229         switch (ni->ni_mlstate) {
2230         case IEEE80211_NODE_MESH_IDLE:
2231         case IEEE80211_NODE_MESH_ESTABLISHED:
2232                 break;
2233         case IEEE80211_NODE_MESH_OPENSNT:
2234         case IEEE80211_NODE_MESH_OPENRCV:
2235                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
2236                         args[0] = ni->ni_mlpid;
2237                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
2238                         ieee80211_send_action(ni,
2239                             IEEE80211_ACTION_CAT_MESHPEERING,
2240                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
2241                         ni->ni_mlrcnt = 0;
2242                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2243                         mesh_peer_timeout_setup(ni);
2244                 } else {
2245                         args[0] = ni->ni_mlpid;
2246                         ieee80211_send_action(ni,
2247                             IEEE80211_ACTION_CAT_MESHPEERING,
2248                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
2249                         ni->ni_mlrcnt++;
2250                         mesh_peer_timeout_backoff(ni);
2251                 }
2252                 break;
2253         case IEEE80211_NODE_MESH_CONFIRMRCV:
2254                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
2255                         args[0] = ni->ni_mlpid;
2256                         args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
2257                         ieee80211_send_action(ni,
2258                             IEEE80211_ACTION_CAT_MESHPEERING,
2259                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
2260                         ni->ni_mlrcnt = 0;
2261                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2262                         mesh_peer_timeout_setup(ni);
2263                 } else {
2264                         ni->ni_mlrcnt++;
2265                         mesh_peer_timeout_setup(ni);
2266                 }
2267                 break;
2268         case IEEE80211_NODE_MESH_HOLDING:
2269                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2270                 break;
2271         }
2272 }
2273
2274 static int
2275 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
2276 {
2277         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2278
2279         if (ie == NULL || ie[1] != ms->ms_idlen)
2280                 return 1;
2281         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
2282 }
2283
2284 /*
2285  * Check if we are using the same algorithms for this mesh.
2286  */
2287 static int
2288 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
2289 {
2290         const struct ieee80211_meshconf_ie *meshconf =
2291             (const struct ieee80211_meshconf_ie *) ie;
2292         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
2293         uint16_t cap;
2294
2295         if (meshconf == NULL)
2296                 return 1;
2297         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
2298                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2299                     "unknown path selection algorithm: 0x%x\n",
2300                     meshconf->conf_pselid);
2301                 return 1;
2302         }
2303         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
2304                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2305                     "unknown path metric algorithm: 0x%x\n",
2306                     meshconf->conf_pmetid);
2307                 return 1;
2308         }
2309         if (meshconf->conf_ccid != 0) {
2310                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2311                     "unknown congestion control algorithm: 0x%x\n",
2312                     meshconf->conf_ccid);
2313                 return 1;
2314         }
2315         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
2316                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2317                     "unknown sync algorithm: 0x%x\n",
2318                     meshconf->conf_syncid);
2319                 return 1;
2320         }
2321         if (meshconf->conf_authid != 0) {
2322                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2323                     "unknown auth auth algorithm: 0x%x\n",
2324                     meshconf->conf_pselid);
2325                 return 1;
2326         }
2327         /* NB: conf_cap is only read correctly here */
2328         cap = LE_READ_2(&meshconf->conf_cap);
2329         /* Not accepting peers */
2330         if (!(cap & IEEE80211_MESHCONF_CAP_AP)) {
2331                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2332                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
2333                 return 1;
2334         }
2335         return 0;
2336 }
2337
2338 static int
2339 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
2340     const uint8_t *ie)
2341 {
2342         const struct ieee80211_meshpeer_ie *meshpeer =
2343             (const struct ieee80211_meshpeer_ie *) ie;
2344
2345         if (meshpeer == NULL || meshpeer->peer_len < 6 ||
2346             meshpeer->peer_len > 10)
2347                 return 1;
2348         switch (subtype) {
2349         case IEEE80211_MESH_PEER_LINK_OPEN:
2350                 if (meshpeer->peer_len != 6)
2351                         return 1;
2352                 break;
2353         case IEEE80211_MESH_PEER_LINK_CONFIRM:
2354                 if (meshpeer->peer_len != 8)
2355                         return 1;
2356                 break;
2357         case IEEE80211_MESH_PEER_LINK_CLOSE:
2358                 if (meshpeer->peer_len < 8)
2359                         return 1;
2360                 if (meshpeer->peer_len == 8 && meshpeer->peer_linkid != 0)
2361                         return 1;
2362                 if (meshpeer->peer_rcode == 0)
2363                         return 1;
2364                 break;
2365         }
2366         return 0;
2367 }
2368
2369 /*
2370  * Add a Mesh ID IE to a frame.
2371  */
2372 uint8_t *
2373 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
2374 {
2375         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2376
2377         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
2378
2379         *frm++ = IEEE80211_ELEMID_MESHID;
2380         *frm++ = ms->ms_idlen;
2381         memcpy(frm, ms->ms_id, ms->ms_idlen);
2382         return frm + ms->ms_idlen;
2383 }
2384
2385 /*
2386  * Add a Mesh Configuration IE to a frame.
2387  * For now just use HWMP routing, Airtime link metric, Null Congestion
2388  * Signaling, Null Sync Protocol and Null Authentication.
2389  */
2390 uint8_t *
2391 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
2392 {
2393         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
2394         uint16_t caps;
2395
2396         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
2397
2398         *frm++ = IEEE80211_ELEMID_MESHCONF;
2399         *frm++ = sizeof(struct ieee80211_meshconf_ie) - 2;
2400         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
2401         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
2402         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
2403         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
2404         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
2405         /* NB: set the number of neighbors before the rest */
2406         *frm = (ms->ms_neighbors > 15 ? 15 : ms->ms_neighbors) << 1;
2407         if (ms->ms_flags & IEEE80211_MESHFLAGS_PORTAL)
2408                 *frm |= IEEE80211_MESHCONF_FORM_MP;
2409         frm += 1;
2410         caps = 0;
2411         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
2412                 caps |= IEEE80211_MESHCONF_CAP_AP;
2413         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
2414                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
2415         ADDSHORT(frm, caps);
2416         return frm;
2417 }
2418
2419 /*
2420  * Add a Mesh Peer Management IE to a frame.
2421  */
2422 uint8_t *
2423 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
2424     uint16_t peerid, uint16_t reason)
2425 {
2426         /* XXX change for AH */
2427         static const uint8_t meshpeerproto[4] = IEEE80211_MESH_PEER_PROTO;
2428
2429         KASSERT(localid != 0, ("localid == 0"));
2430
2431         *frm++ = IEEE80211_ELEMID_MESHPEER;
2432         switch (subtype) {
2433         case IEEE80211_MESH_PEER_LINK_OPEN:
2434                 *frm++ = 6;             /* length */
2435                 memcpy(frm, meshpeerproto, 4);
2436                 frm += 4;
2437                 ADDSHORT(frm, localid); /* local ID */
2438                 break;
2439         case IEEE80211_MESH_PEER_LINK_CONFIRM:
2440                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
2441                 *frm++ = 8;             /* length */
2442                 memcpy(frm, meshpeerproto, 4);
2443                 frm += 4;
2444                 ADDSHORT(frm, localid); /* local ID */
2445                 ADDSHORT(frm, peerid);  /* peer ID */
2446                 break;
2447         case IEEE80211_MESH_PEER_LINK_CLOSE:
2448                 if (peerid)
2449                         *frm++ = 10;    /* length */
2450                 else
2451                         *frm++ = 8;     /* length */
2452                 memcpy(frm, meshpeerproto, 4);
2453                 frm += 4;
2454                 ADDSHORT(frm, localid); /* local ID */
2455                 if (peerid)
2456                         ADDSHORT(frm, peerid);  /* peer ID */
2457                 ADDSHORT(frm, reason);
2458                 break;
2459         }
2460         return frm;
2461 }
2462
2463 /*
2464  * Compute an Airtime Link Metric for the link with this node.
2465  *
2466  * Based on Draft 3.0 spec (11B.10, p.149).
2467  */
2468 /*
2469  * Max 802.11s overhead.
2470  */
2471 #define IEEE80211_MESH_MAXOVERHEAD \
2472         (sizeof(struct ieee80211_qosframe_addr4) \
2473          + sizeof(struct ieee80211_meshcntl_ae11) \
2474         + sizeof(struct llc) \
2475         + IEEE80211_ADDR_LEN \
2476         + IEEE80211_WEP_IVLEN \
2477         + IEEE80211_WEP_KIDLEN \
2478         + IEEE80211_WEP_CRCLEN \
2479         + IEEE80211_WEP_MICLEN \
2480         + IEEE80211_CRC_LEN)
2481 uint32_t
2482 mesh_airtime_calc(struct ieee80211_node *ni)
2483 {
2484 #define M_BITS 8
2485 #define S_FACTOR (2 * M_BITS)
2486         struct ieee80211com *ic = ni->ni_ic;
2487         struct ifnet *ifp = ni->ni_vap->iv_ifp;
2488         const static int nbits = 8192 << M_BITS;
2489         uint32_t overhead, rate, errrate;
2490         uint64_t res;
2491
2492         /* Time to transmit a frame */
2493         rate = ni->ni_txrate;
2494         overhead = ieee80211_compute_duration(ic->ic_rt,
2495             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
2496         /* Error rate in percentage */
2497         /* XXX assuming small failures are ok */
2498         errrate = (((ifp->if_oerrors +
2499             ifp->if_ierrors) / 100) << M_BITS) / 100;
2500         res = (overhead + (nbits / rate)) *
2501             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
2502
2503         return (uint32_t)(res >> S_FACTOR);
2504 #undef M_BITS
2505 #undef S_FACTOR
2506 }
2507
2508 /*
2509  * Add a Mesh Link Metric report IE to a frame.
2510  */
2511 uint8_t *
2512 ieee80211_add_meshlmetric(uint8_t *frm, uint32_t metric)
2513 {
2514         *frm++ = IEEE80211_ELEMID_MESHLINK;
2515         *frm++ = 4;
2516         ADDWORD(frm, metric);
2517         return frm;
2518 }
2519 #undef ADDSHORT
2520 #undef ADDWORD
2521
2522 /*
2523  * Initialize any mesh-specific node state.
2524  */
2525 void
2526 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
2527 {
2528         ni->ni_flags |= IEEE80211_NODE_QOS;
2529         callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE);
2530 }
2531
2532 /*
2533  * Cleanup any mesh-specific node state.
2534  */
2535 void
2536 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
2537 {
2538         struct ieee80211vap *vap = ni->ni_vap;
2539         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2540
2541         callout_drain(&ni->ni_mltimer);
2542         /* NB: short-circuit callbacks after mesh_vdetach */
2543         if (vap->iv_mesh != NULL)
2544                 ms->ms_ppath->mpp_peerdown(ni);
2545 }
2546
2547 void
2548 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
2549 {
2550         ni->ni_meshidlen = ie[1];
2551         memcpy(ni->ni_meshid, ie + 2, ie[1]);
2552 }
2553
2554 /*
2555  * Setup mesh-specific node state on neighbor discovery.
2556  */
2557 void
2558 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
2559         const struct ieee80211_frame *wh,
2560         const struct ieee80211_scanparams *sp)
2561 {
2562         ieee80211_parse_meshid(ni, sp->meshid);
2563 }
2564
2565 void
2566 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
2567         struct ieee80211_beacon_offsets *bo)
2568 {
2569         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
2570
2571         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
2572                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
2573                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
2574         }
2575 }
2576
2577 static int
2578 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
2579 {
2580         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2581         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
2582         struct ieee80211_mesh_route *rt;
2583         struct ieee80211req_mesh_route *imr;
2584         size_t len, off;
2585         uint8_t *p;
2586         int error;
2587
2588         if (vap->iv_opmode != IEEE80211_M_MBSS)
2589                 return ENOSYS;
2590
2591         error = 0;
2592         switch (ireq->i_type) {
2593         case IEEE80211_IOC_MESH_ID:
2594                 ireq->i_len = ms->ms_idlen;
2595                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
2596                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
2597                 break;
2598         case IEEE80211_IOC_MESH_AP:
2599                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
2600                 break;
2601         case IEEE80211_IOC_MESH_FWRD:
2602                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
2603                 break;
2604         case IEEE80211_IOC_MESH_TTL:
2605                 ireq->i_val = ms->ms_ttl;
2606                 break;
2607         case IEEE80211_IOC_MESH_RTCMD:
2608                 switch (ireq->i_val) {
2609                 case IEEE80211_MESH_RTCMD_LIST:
2610                         len = 0;
2611                         MESH_RT_LOCK(ms);
2612                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
2613                                 len += sizeof(*imr);
2614                         }
2615                         MESH_RT_UNLOCK(ms);
2616                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
2617                                 ireq->i_len = len;
2618                                 return ENOMEM;
2619                         }
2620                         ireq->i_len = len;
2621                         /* XXX M_WAIT? */
2622                         p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO);
2623                         if (p == NULL)
2624                                 return ENOMEM;
2625                         off = 0;
2626                         MESH_RT_LOCK(ms);
2627                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
2628                                 if (off >= len)
2629                                         break;
2630                                 imr = (struct ieee80211req_mesh_route *)
2631                                     (p + off);
2632                                 imr->imr_flags = rt->rt_flags;
2633                                 IEEE80211_ADDR_COPY(imr->imr_dest,
2634                                     rt->rt_dest);
2635                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
2636                                     rt->rt_nexthop);
2637                                 imr->imr_metric = rt->rt_metric;
2638                                 imr->imr_nhops = rt->rt_nhops;
2639                                 imr->imr_lifetime = rt->rt_lifetime;
2640                                 imr->imr_lastmseq = rt->rt_lastmseq;
2641                                 off += sizeof(*imr);
2642                         }
2643                         MESH_RT_UNLOCK(ms);
2644                         error = copyout(p, (uint8_t *)ireq->i_data,
2645                             ireq->i_len);
2646                         free(p, M_TEMP);
2647                         break;
2648                 case IEEE80211_MESH_RTCMD_FLUSH:
2649                 case IEEE80211_MESH_RTCMD_ADD:
2650                 case IEEE80211_MESH_RTCMD_DELETE:
2651                         return EINVAL;
2652                 default:
2653                         return ENOSYS;
2654                 }
2655                 break;
2656         case IEEE80211_IOC_MESH_PR_METRIC:
2657                 len = strlen(ms->ms_pmetric->mpm_descr);
2658                 if (ireq->i_len < len)
2659                         return EINVAL;
2660                 ireq->i_len = len;
2661                 error = copyout(ms->ms_pmetric->mpm_descr,
2662                     (uint8_t *)ireq->i_data, len);
2663                 break;
2664         case IEEE80211_IOC_MESH_PR_PATH:
2665                 len = strlen(ms->ms_ppath->mpp_descr);
2666                 if (ireq->i_len < len)
2667                         return EINVAL;
2668                 ireq->i_len = len;
2669                 error = copyout(ms->ms_ppath->mpp_descr,
2670                     (uint8_t *)ireq->i_data, len);
2671                 break;
2672         default:
2673                 return ENOSYS;
2674         }
2675
2676         return error;
2677 }
2678 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
2679
2680 static int
2681 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
2682 {
2683         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2684         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
2685         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
2686         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
2687         int error;
2688
2689         if (vap->iv_opmode != IEEE80211_M_MBSS)
2690                 return ENOSYS;
2691
2692         error = 0;
2693         switch (ireq->i_type) {
2694         case IEEE80211_IOC_MESH_ID:
2695                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
2696                         return EINVAL;
2697                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
2698                 if (error != 0)
2699                         break;
2700                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
2701                 ms->ms_idlen = ireq->i_len;
2702                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
2703                 error = ENETRESET;
2704                 break;
2705         case IEEE80211_IOC_MESH_AP:
2706                 if (ireq->i_val)
2707                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
2708                 else
2709                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
2710                 error = ENETRESET;
2711                 break;
2712         case IEEE80211_IOC_MESH_FWRD:
2713                 if (ireq->i_val)
2714                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
2715                 else
2716                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
2717                 break;
2718         case IEEE80211_IOC_MESH_TTL:
2719                 ms->ms_ttl = (uint8_t) ireq->i_val;
2720                 break;
2721         case IEEE80211_IOC_MESH_RTCMD:
2722                 switch (ireq->i_val) {
2723                 case IEEE80211_MESH_RTCMD_LIST:
2724                         return EINVAL;
2725                 case IEEE80211_MESH_RTCMD_FLUSH:
2726                         ieee80211_mesh_rt_flush(vap);
2727                         break;
2728                 case IEEE80211_MESH_RTCMD_ADD:
2729                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
2730                             IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
2731                                 return EINVAL;
2732                         error = copyin(ireq->i_data, &tmpaddr,
2733                             IEEE80211_ADDR_LEN);
2734                         if (error == 0)
2735                                 ieee80211_mesh_discover(vap, tmpaddr, NULL);
2736                         break;
2737                 case IEEE80211_MESH_RTCMD_DELETE:
2738                         ieee80211_mesh_rt_del(vap, ireq->i_data);
2739                         break;
2740                 default:
2741                         return ENOSYS;
2742                 }
2743                 break;
2744         case IEEE80211_IOC_MESH_PR_METRIC:
2745                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
2746                 if (error == 0) {
2747                         error = mesh_select_proto_metric(vap, tmpproto);
2748                         if (error == 0)
2749                                 error = ENETRESET;
2750                 }
2751                 break;
2752         case IEEE80211_IOC_MESH_PR_PATH:
2753                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
2754                 if (error == 0) {
2755                         error = mesh_select_proto_path(vap, tmpproto);
2756                         if (error == 0)
2757                                 error = ENETRESET;
2758                 }
2759                 break;
2760         default:
2761                 return ENOSYS;
2762         }
2763         return error;
2764 }
2765 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);