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)) {
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 && !vap->iv_acl->iac_check(vap, wh)) {
1382                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1383                             wh, NULL, "%s", "disallowed by ACL");
1384                         vap->iv_stats.is_rx_acl++;
1385                         return;
1386                 }
1387                 /*
1388                  * Do neighbor discovery.
1389                  */
1390                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1391                         /*
1392                          * Create a new entry in the neighbor table.
1393                          */
1394                         ni = ieee80211_add_neighbor(vap, wh, &scan);
1395                 }
1396                 /*
1397                  * Automatically peer with discovered nodes if possible.
1398                  * XXX backoff on repeated failure
1399                  */
1400                 if (ni != vap->iv_bss &&
1401                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP) &&
1402                     ni->ni_mlstate == IEEE80211_NODE_MESH_IDLE) {
1403                         uint16_t args[1];
1404
1405                         ni->ni_mlpid = mesh_generateid(vap);
1406                         if (ni->ni_mlpid == 0)
1407                                 return;
1408                         mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1409                         args[0] = ni->ni_mlpid;
1410                         ieee80211_send_action(ni,
1411                             IEEE80211_ACTION_CAT_MESHPEERING,
1412                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
1413                         ni->ni_mlrcnt = 0;
1414                         mesh_peer_timeout_setup(ni);
1415                 }
1416                 break;
1417         }
1418         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1419         {
1420                 uint8_t *ssid, *meshid, *rates, *xrates;
1421                 uint8_t *sfrm;
1422
1423                 if (vap->iv_state != IEEE80211_S_RUN) {
1424                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1425                             wh, NULL, "wrong state %s",
1426                             ieee80211_state_name[vap->iv_state]);
1427                         vap->iv_stats.is_rx_mgtdiscard++;
1428                         return;
1429                 }
1430                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1431                         /* frame must be directed */
1432                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1433                             wh, NULL, "%s", "not unicast");
1434                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
1435                         return;
1436                 }
1437                 /*
1438                  * prreq frame format
1439                  *      [tlv] ssid
1440                  *      [tlv] supported rates
1441                  *      [tlv] extended supported rates
1442                  *      [tlv] mesh id
1443                  */
1444                 ssid = meshid = rates = xrates = NULL;
1445                 sfrm = frm;
1446                 while (efrm - frm > 1) {
1447                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1448                         switch (*frm) {
1449                         case IEEE80211_ELEMID_SSID:
1450                                 ssid = frm;
1451                                 break;
1452                         case IEEE80211_ELEMID_RATES:
1453                                 rates = frm;
1454                                 break;
1455                         case IEEE80211_ELEMID_XRATES:
1456                                 xrates = frm;
1457                                 break;
1458                         case IEEE80211_ELEMID_MESHID:
1459                                 meshid = frm;
1460                                 break;
1461                         }
1462                         frm += frm[1] + 2;
1463                 }
1464                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1465                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1466                 if (xrates != NULL)
1467                         IEEE80211_VERIFY_ELEMENT(xrates,
1468                             IEEE80211_RATE_MAXSIZE - rates[1], return);
1469                 if (meshid != NULL) {
1470                         IEEE80211_VERIFY_ELEMENT(meshid,
1471                             IEEE80211_MESHID_LEN, return);
1472                         /* NB: meshid, not ssid */
1473                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
1474                 }
1475
1476                 /* XXX find a better class or define it's own */
1477                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1478                     "%s", "recv probe req");
1479                 /*
1480                  * Some legacy 11b clients cannot hack a complete
1481                  * probe response frame.  When the request includes
1482                  * only a bare-bones rate set, communicate this to
1483                  * the transmit side.
1484                  */
1485                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
1486                 break;
1487         }
1488
1489         case IEEE80211_FC0_SUBTYPE_ACTION:
1490         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
1491                 if (ni == vap->iv_bss) {
1492                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1493                             wh, NULL, "%s", "unknown node");
1494                         vap->iv_stats.is_rx_mgtdiscard++;
1495                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
1496                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1497                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1498                             wh, NULL, "%s", "not for us");
1499                         vap->iv_stats.is_rx_mgtdiscard++;
1500                 } else if (vap->iv_state != IEEE80211_S_RUN) {
1501                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1502                             wh, NULL, "wrong state %s",
1503                             ieee80211_state_name[vap->iv_state]);
1504                         vap->iv_stats.is_rx_mgtdiscard++;
1505                 } else {
1506                         if (ieee80211_parse_action(ni, m0) == 0)
1507                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
1508                 }
1509                 break;
1510
1511         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1512         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
1513         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
1514         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
1515         case IEEE80211_FC0_SUBTYPE_ATIM:
1516         case IEEE80211_FC0_SUBTYPE_DISASSOC:
1517         case IEEE80211_FC0_SUBTYPE_AUTH:
1518         case IEEE80211_FC0_SUBTYPE_DEAUTH:
1519                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1520                     wh, NULL, "%s", "not handled");
1521                 vap->iv_stats.is_rx_mgtdiscard++;
1522                 break;
1523
1524         default:
1525                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1526                     wh, "mgt", "subtype 0x%x not handled", subtype);
1527                 vap->iv_stats.is_rx_badsubtype++;
1528                 break;
1529         }
1530 }
1531
1532 static void
1533 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
1534 {
1535
1536         switch (subtype) {
1537         case IEEE80211_FC0_SUBTYPE_BAR:
1538                 ieee80211_recv_bar(ni, m);
1539                 break;
1540         }
1541 }
1542
1543 /*
1544  * Parse meshpeering action ie's for open+confirm frames; the
1545  * important bits are returned in the supplied structure.
1546  */
1547 static const struct ieee80211_meshpeer_ie *
1548 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
1549         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
1550         const uint8_t *frm, const uint8_t *efrm,
1551         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
1552 {
1553         struct ieee80211vap *vap = ni->ni_vap;
1554         const struct ieee80211_meshpeer_ie *mpie;
1555         const uint8_t *meshid, *meshconf, *meshpeer;
1556
1557         meshid = meshconf = meshpeer = NULL;
1558         while (efrm - frm > 1) {
1559                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
1560                 switch (*frm) {
1561                 case IEEE80211_ELEMID_MESHID:
1562                         meshid = frm;
1563                         break;
1564                 case IEEE80211_ELEMID_MESHCONF:
1565                         meshconf = frm;
1566                         break;
1567                 case IEEE80211_ELEMID_MESHPEER:
1568                         meshpeer = frm;
1569                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
1570                         memset(mp, 0, sizeof(*mp));
1571                         mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid);
1572                         /* NB: peer link ID is optional on these frames */
1573                         if (subtype == IEEE80211_MESH_PEER_LINK_CLOSE &&
1574                             mpie->peer_len == 8) {
1575                                 mp->peer_linkid = 0;
1576                                 mp->peer_rcode = LE_READ_2(&mpie->peer_linkid);
1577                         } else {
1578                                 mp->peer_linkid = LE_READ_2(&mpie->peer_linkid);
1579                                 mp->peer_rcode = LE_READ_2(&mpie->peer_rcode);
1580                         }
1581                         break;
1582                 }
1583                 frm += frm[1] + 2;
1584         }
1585
1586         /*
1587          * Verify the contents of the frame. Action frames with
1588          * close subtype don't have a Mesh Configuration IE.
1589          * If if fails validation, close the peer link.
1590          */
1591         KASSERT(meshpeer != NULL &&
1592             subtype != IEEE80211_ACTION_MESHPEERING_CLOSE,
1593             ("parsing close action"));
1594
1595         if (mesh_verify_meshid(vap, meshid) ||
1596             mesh_verify_meshpeer(vap, subtype, meshpeer) ||
1597             mesh_verify_meshconf(vap, meshconf)) {
1598                 uint16_t args[3];
1599
1600                 IEEE80211_DISCARD(vap,
1601                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1602                     wh, NULL, "%s", "not for our mesh");
1603                 vap->iv_stats.is_rx_mgtdiscard++;
1604                 switch (ni->ni_mlstate) {
1605                 case IEEE80211_NODE_MESH_IDLE:
1606                 case IEEE80211_NODE_MESH_ESTABLISHED:
1607                 case IEEE80211_NODE_MESH_HOLDING:
1608                         /* ignore */
1609                         break;
1610                 case IEEE80211_NODE_MESH_OPENSNT:
1611                 case IEEE80211_NODE_MESH_OPENRCV:
1612                 case IEEE80211_NODE_MESH_CONFIRMRCV:
1613                         args[0] = ni->ni_mlpid;
1614                         args[1] = ni->ni_mllid;
1615                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1616                         ieee80211_send_action(ni,
1617                             IEEE80211_ACTION_CAT_MESHPEERING,
1618                             IEEE80211_ACTION_MESHPEERING_CLOSE,
1619                             args);
1620                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1621                         mesh_peer_timeout_setup(ni);
1622                         break;
1623                 }
1624                 return NULL;
1625         }
1626         return (const struct ieee80211_meshpeer_ie *) mp;
1627 }
1628
1629 static int
1630 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
1631         const struct ieee80211_frame *wh,
1632         const uint8_t *frm, const uint8_t *efrm)
1633 {
1634         struct ieee80211vap *vap = ni->ni_vap;
1635         struct ieee80211_meshpeer_ie ie;
1636         const struct ieee80211_meshpeer_ie *meshpeer;
1637         uint16_t args[3];
1638
1639         /* +2+2 for action + code + capabilites */
1640         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
1641             IEEE80211_ACTION_MESHPEERING_OPEN);
1642         if (meshpeer == NULL) {
1643                 return 0;
1644         }
1645
1646         /* XXX move up */
1647         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1648             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
1649
1650         switch (ni->ni_mlstate) {
1651         case IEEE80211_NODE_MESH_IDLE:
1652                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
1653                 ni->ni_mllid = meshpeer->peer_llinkid;
1654                 ni->ni_mlpid = mesh_generateid(vap);
1655                 if (ni->ni_mlpid == 0)
1656                         return 0;               /* XXX */
1657                 args[0] = ni->ni_mlpid;
1658                 /* Announce we're open too... */
1659                 ieee80211_send_action(ni,
1660                     IEEE80211_ACTION_CAT_MESHPEERING,
1661                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
1662                 /* ...and confirm the link. */
1663                 args[0] = ni->ni_mlpid;
1664                 args[1] = ni->ni_mllid;
1665                 ieee80211_send_action(ni,
1666                     IEEE80211_ACTION_CAT_MESHPEERING,
1667                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
1668                     args);
1669                 mesh_peer_timeout_setup(ni);
1670                 break;
1671         case IEEE80211_NODE_MESH_OPENRCV:
1672                 /* Wrong Link ID */
1673                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
1674                         args[0] = ni->ni_mllid;
1675                         args[1] = ni->ni_mlpid;
1676                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1677                         ieee80211_send_action(ni,
1678                             IEEE80211_ACTION_CAT_MESHPEERING,
1679                             IEEE80211_ACTION_MESHPEERING_CLOSE,
1680                             args);
1681                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1682                         mesh_peer_timeout_setup(ni);
1683                         break;
1684                 }
1685                 /* Duplicate open, confirm again. */
1686                 args[0] = ni->ni_mlpid;
1687                 args[1] = ni->ni_mllid;
1688                 ieee80211_send_action(ni,
1689                     IEEE80211_ACTION_CAT_MESHPEERING,
1690                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
1691                     args);
1692                 break;
1693         case IEEE80211_NODE_MESH_OPENSNT:
1694                 ni->ni_mllid = meshpeer->peer_llinkid;
1695                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
1696                 args[0] = ni->ni_mlpid;
1697                 args[1] = ni->ni_mllid;
1698                 ieee80211_send_action(ni,
1699                     IEEE80211_ACTION_CAT_MESHPEERING,
1700                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
1701                     args);
1702                 /* NB: don't setup/clear any timeout */
1703                 break;
1704         case IEEE80211_NODE_MESH_CONFIRMRCV:
1705                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
1706                     ni->ni_mllid != meshpeer->peer_llinkid) {
1707                         args[0] = ni->ni_mlpid;
1708                         args[1] = ni->ni_mllid;
1709                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1710                         ieee80211_send_action(ni,
1711                             IEEE80211_ACTION_CAT_MESHPEERING,
1712                             IEEE80211_ACTION_MESHPEERING_CLOSE,
1713                             args);
1714                         mesh_linkchange(ni,
1715                             IEEE80211_NODE_MESH_HOLDING);
1716                         mesh_peer_timeout_setup(ni);
1717                         break;
1718                 }
1719                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
1720                 ni->ni_mllid = meshpeer->peer_llinkid;
1721                 args[0] = ni->ni_mlpid;
1722                 args[1] = ni->ni_mllid;
1723                 ieee80211_send_action(ni,
1724                     IEEE80211_ACTION_CAT_MESHPEERING,
1725                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
1726                     args);
1727                 mesh_peer_timeout_stop(ni);
1728                 break;
1729         case IEEE80211_NODE_MESH_ESTABLISHED:
1730                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
1731                         args[0] = ni->ni_mllid;
1732                         args[1] = ni->ni_mlpid;
1733                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1734                         ieee80211_send_action(ni,
1735                             IEEE80211_ACTION_CAT_MESHPEERING,
1736                             IEEE80211_ACTION_MESHPEERING_CLOSE,
1737                             args);
1738                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1739                         mesh_peer_timeout_setup(ni);
1740                         break;
1741                 }
1742                 args[0] = ni->ni_mlpid;
1743                 args[1] = ni->ni_mllid;
1744                 ieee80211_send_action(ni,
1745                     IEEE80211_ACTION_CAT_MESHPEERING,
1746                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
1747                     args);
1748                 break;
1749         case IEEE80211_NODE_MESH_HOLDING:
1750                 args[0] = ni->ni_mlpid;
1751                 args[1] = meshpeer->peer_llinkid;
1752                 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
1753                 ieee80211_send_action(ni,
1754                     IEEE80211_ACTION_CAT_MESHPEERING,
1755                     IEEE80211_ACTION_MESHPEERING_CLOSE,
1756                     args);
1757                 break;
1758         }
1759         return 0;
1760 }
1761
1762 static int
1763 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
1764         const struct ieee80211_frame *wh,
1765         const uint8_t *frm, const uint8_t *efrm)
1766 {
1767         struct ieee80211vap *vap = ni->ni_vap;
1768         struct ieee80211_meshpeer_ie ie;
1769         const struct ieee80211_meshpeer_ie *meshpeer;
1770         uint16_t args[3];
1771
1772         /* +2+2+2+2 for action + code + capabilites + status code + AID */
1773         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
1774             IEEE80211_ACTION_MESHPEERING_CONFIRM);
1775         if (meshpeer == NULL) {
1776                 return 0;
1777         }
1778
1779         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1780             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
1781             meshpeer->peer_llinkid, meshpeer->peer_linkid);
1782
1783         switch (ni->ni_mlstate) {
1784         case IEEE80211_NODE_MESH_OPENRCV:
1785                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
1786                 mesh_peer_timeout_stop(ni);
1787                 break;
1788         case IEEE80211_NODE_MESH_OPENSNT:
1789                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
1790                 break;
1791         case IEEE80211_NODE_MESH_HOLDING:
1792                 args[0] = ni->ni_mlpid;
1793                 args[1] = meshpeer->peer_llinkid;
1794                 args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
1795                 ieee80211_send_action(ni,
1796                     IEEE80211_ACTION_CAT_MESHPEERING,
1797                     IEEE80211_ACTION_MESHPEERING_CLOSE,
1798                     args);
1799                 break;
1800         case IEEE80211_NODE_MESH_CONFIRMRCV:
1801                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
1802                         args[0] = ni->ni_mlpid;
1803                         args[1] = ni->ni_mllid;
1804                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
1805                         ieee80211_send_action(ni,
1806                             IEEE80211_ACTION_CAT_MESHPEERING,
1807                             IEEE80211_ACTION_MESHPEERING_CLOSE,
1808                             args);
1809                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1810                         mesh_peer_timeout_setup(ni);
1811                 }
1812                 break;
1813         default:
1814                 IEEE80211_DISCARD(vap,
1815                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1816                     wh, NULL, "received confirm in invalid state %d",
1817                     ni->ni_mlstate);
1818                 vap->iv_stats.is_rx_mgtdiscard++;
1819                 break;
1820         }
1821         return 0;
1822 }
1823
1824 static int
1825 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
1826         const struct ieee80211_frame *wh,
1827         const uint8_t *frm, const uint8_t *efrm)
1828 {
1829         uint16_t args[3];
1830
1831         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
1832             ni, "%s", "recv PEER CLOSE");
1833
1834         switch (ni->ni_mlstate) {
1835         case IEEE80211_NODE_MESH_IDLE:
1836                 /* ignore */
1837                 break;
1838         case IEEE80211_NODE_MESH_OPENRCV:
1839         case IEEE80211_NODE_MESH_OPENSNT:
1840         case IEEE80211_NODE_MESH_CONFIRMRCV:
1841         case IEEE80211_NODE_MESH_ESTABLISHED:
1842                 args[0] = ni->ni_mlpid;
1843                 args[1] = ni->ni_mllid;
1844                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
1845                 ieee80211_send_action(ni,
1846                     IEEE80211_ACTION_CAT_MESHPEERING,
1847                     IEEE80211_ACTION_MESHPEERING_CLOSE,
1848                     args);
1849                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
1850                 mesh_peer_timeout_setup(ni);
1851                 break;
1852         case IEEE80211_NODE_MESH_HOLDING:
1853                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
1854                 mesh_peer_timeout_setup(ni);
1855                 break;
1856         }
1857         return 0;
1858 }
1859
1860 /*
1861  * Link Metric handling.
1862  */
1863 static int
1864 mesh_recv_action_meshlmetric_req(struct ieee80211_node *ni,
1865         const struct ieee80211_frame *wh,
1866         const uint8_t *frm, const uint8_t *efrm)
1867 {
1868         uint32_t metric;
1869
1870         metric = mesh_airtime_calc(ni);
1871         ieee80211_send_action(ni,
1872             IEEE80211_ACTION_CAT_MESHLMETRIC,
1873             IEEE80211_ACTION_MESHLMETRIC_REP,
1874             &metric);
1875         return 0;
1876 }
1877
1878 static int
1879 mesh_recv_action_meshlmetric_rep(struct ieee80211_node *ni,
1880         const struct ieee80211_frame *wh,
1881         const uint8_t *frm, const uint8_t *efrm)
1882 {
1883         return 0;
1884 }
1885
1886 static int
1887 mesh_send_action(struct ieee80211_node *ni, struct mbuf *m)
1888 {
1889         struct ieee80211_bpf_params params;
1890
1891         memset(&params, 0, sizeof(params));
1892         params.ibp_pri = WME_AC_VO;
1893         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
1894         /* XXX ucast/mcast */
1895         params.ibp_try0 = ni->ni_txparms->maxretry;
1896         params.ibp_power = ni->ni_txpower;
1897         return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION,
1898              &params);
1899 }
1900
1901 #define ADDSHORT(frm, v) do {                   \
1902         frm[0] = (v) & 0xff;                    \
1903         frm[1] = (v) >> 8;                      \
1904         frm += 2;                               \
1905 } while (0)
1906 #define ADDWORD(frm, v) do {                    \
1907         frm[0] = (v) & 0xff;                    \
1908         frm[1] = ((v) >> 8) & 0xff;             \
1909         frm[2] = ((v) >> 16) & 0xff;            \
1910         frm[3] = ((v) >> 24) & 0xff;            \
1911         frm += 4;                               \
1912 } while (0)
1913
1914 static int
1915 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
1916         int category, int action, void *args0)
1917 {
1918         struct ieee80211vap *vap = ni->ni_vap;
1919         struct ieee80211com *ic = ni->ni_ic;
1920         uint16_t *args = args0;
1921         const struct ieee80211_rateset *rs;
1922         struct mbuf *m;
1923         uint8_t *frm;
1924
1925         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1926             "send PEER OPEN action: localid 0x%x", args[0]);
1927
1928         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1929             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
1930             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
1931         ieee80211_ref_node(ni);
1932
1933         m = ieee80211_getmgtframe(&frm,
1934             ic->ic_headroom + sizeof(struct ieee80211_frame),
1935             sizeof(uint16_t)    /* action+category */
1936             + sizeof(uint16_t)  /* capabilites */
1937             + 2 + IEEE80211_RATE_SIZE
1938             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
1939             + 2 + IEEE80211_MESHID_LEN
1940             + sizeof(struct ieee80211_meshconf_ie)
1941             + sizeof(struct ieee80211_meshpeer_ie)
1942         );
1943         if (m != NULL) {
1944                 /*
1945                  * mesh peer open action frame format:
1946                  *   [1] category
1947                  *   [1] action
1948                  *   [2] capabilities
1949                  *   [tlv] rates
1950                  *   [tlv] xrates
1951                  *   [tlv] mesh id
1952                  *   [tlv] mesh conf
1953                  *   [tlv] mesh peer link mgmt
1954                  */
1955                 *frm++ = category;
1956                 *frm++ = action;
1957                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
1958                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
1959                 frm = ieee80211_add_rates(frm, rs);
1960                 frm = ieee80211_add_xrates(frm, rs);
1961                 frm = ieee80211_add_meshid(frm, vap);
1962                 frm = ieee80211_add_meshconf(frm, vap);
1963                 frm = ieee80211_add_meshpeer(frm, IEEE80211_MESH_PEER_LINK_OPEN,
1964                     args[0], 0, 0);
1965                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
1966                 return mesh_send_action(ni, m);
1967         } else {
1968                 vap->iv_stats.is_tx_nobuf++;
1969                 ieee80211_free_node(ni);
1970                 return ENOMEM;
1971         }
1972 }
1973
1974 static int
1975 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
1976         int category, int action, void *args0)
1977 {
1978         struct ieee80211vap *vap = ni->ni_vap;
1979         struct ieee80211com *ic = ni->ni_ic;
1980         uint16_t *args = args0;
1981         const struct ieee80211_rateset *rs;
1982         struct mbuf *m;
1983         uint8_t *frm;
1984
1985         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
1986             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
1987             args[0], args[1]);
1988
1989         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
1990             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
1991             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
1992         ieee80211_ref_node(ni);
1993
1994         m = ieee80211_getmgtframe(&frm,
1995             ic->ic_headroom + sizeof(struct ieee80211_frame),
1996             sizeof(uint16_t)    /* action+category */
1997             + sizeof(uint16_t)  /* capabilites */
1998             + sizeof(uint16_t)  /* status code */
1999             + sizeof(uint16_t)  /* AID */
2000             + 2 + IEEE80211_RATE_SIZE
2001             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2002             + 2 + IEEE80211_MESHID_LEN
2003             + sizeof(struct ieee80211_meshconf_ie)
2004             + sizeof(struct ieee80211_meshpeer_ie)
2005         );
2006         if (m != NULL) {
2007                 /*
2008                  * mesh peer confirm action frame format:
2009                  *   [1] category
2010                  *   [1] action
2011                  *   [2] capabilities
2012                  *   [2] status code
2013                  *   [2] association id (peer ID)
2014                  *   [tlv] rates
2015                  *   [tlv] xrates
2016                  *   [tlv] mesh id
2017                  *   [tlv] mesh conf
2018                  *   [tlv] mesh peer link mgmt
2019                  */
2020                 *frm++ = category;
2021                 *frm++ = action;
2022                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2023                 ADDSHORT(frm, 0);               /* status code */
2024                 ADDSHORT(frm, args[1]);         /* AID */
2025                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2026                 frm = ieee80211_add_rates(frm, rs);
2027                 frm = ieee80211_add_xrates(frm, rs);
2028                 frm = ieee80211_add_meshid(frm, vap);
2029                 frm = ieee80211_add_meshconf(frm, vap);
2030                 frm = ieee80211_add_meshpeer(frm,
2031                     IEEE80211_MESH_PEER_LINK_CONFIRM,
2032                     args[0], args[1], 0);
2033                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2034                 return mesh_send_action(ni, m);
2035         } else {
2036                 vap->iv_stats.is_tx_nobuf++;
2037                 ieee80211_free_node(ni);
2038                 return ENOMEM;
2039         }
2040 }
2041
2042 static int
2043 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2044         int category, int action, void *args0)
2045 {
2046         struct ieee80211vap *vap = ni->ni_vap;
2047         struct ieee80211com *ic = ni->ni_ic;
2048         uint16_t *args = args0;
2049         struct mbuf *m;
2050         uint8_t *frm;
2051
2052         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2053             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d",
2054             args[0], args[1], args[2]);
2055
2056         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2057             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2058             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2059         ieee80211_ref_node(ni);
2060
2061         m = ieee80211_getmgtframe(&frm,
2062             ic->ic_headroom + sizeof(struct ieee80211_frame),
2063             sizeof(uint16_t)    /* action+category */
2064             + sizeof(uint16_t)  /* reason code */
2065             + 2 + IEEE80211_MESHID_LEN
2066             + sizeof(struct ieee80211_meshpeer_ie)
2067         );
2068         if (m != NULL) {
2069                 /*
2070                  * mesh peer close action frame format:
2071                  *   [1] category
2072                  *   [1] action
2073                  *   [2] reason code
2074                  *   [tlv] mesh id
2075                  *   [tlv] mesh peer link mgmt
2076                  */
2077                 *frm++ = category;
2078                 *frm++ = action;
2079                 ADDSHORT(frm, args[2]);         /* reason code */
2080                 frm = ieee80211_add_meshid(frm, vap);
2081                 frm = ieee80211_add_meshpeer(frm,
2082                     IEEE80211_MESH_PEER_LINK_CLOSE,
2083                     args[0], args[1], args[2]);
2084                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2085                 return mesh_send_action(ni, m);
2086         } else {
2087                 vap->iv_stats.is_tx_nobuf++;
2088                 ieee80211_free_node(ni);
2089                 return ENOMEM;
2090         }
2091 }
2092
2093 static int
2094 mesh_send_action_meshlink_request(struct ieee80211_node *ni,
2095         int category, int action, void *arg0)
2096 {
2097         struct ieee80211vap *vap = ni->ni_vap;
2098         struct ieee80211com *ic = ni->ni_ic;
2099         struct mbuf *m;
2100         uint8_t *frm;
2101
2102         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2103             "%s", "send LINK METRIC REQUEST action");
2104
2105         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2106             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2107             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2108         ieee80211_ref_node(ni);
2109
2110         m = ieee80211_getmgtframe(&frm,
2111             ic->ic_headroom + sizeof(struct ieee80211_frame),
2112             sizeof(uint16_t)    /* action+category */
2113         );
2114         if (m != NULL) {
2115                 /*
2116                  * mesh link metric request
2117                  *   [1] category
2118                  *   [1] action
2119                  */
2120                 *frm++ = category;
2121                 *frm++ = action;
2122                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2123                 return mesh_send_action(ni, m);
2124         } else {
2125                 vap->iv_stats.is_tx_nobuf++;
2126                 ieee80211_free_node(ni);
2127                 return ENOMEM;
2128         }
2129 }
2130
2131 static int
2132 mesh_send_action_meshlink_reply(struct ieee80211_node *ni,
2133         int category, int action, void *args0)
2134 {
2135         struct ieee80211vap *vap = ni->ni_vap;
2136         struct ieee80211com *ic = ni->ni_ic;
2137         uint32_t *metric = args0;
2138         struct mbuf *m;
2139         uint8_t *frm;
2140
2141         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2142             "send LINK METRIC REPLY action: metric 0x%x", *metric);
2143
2144         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2145             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2146             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2147         ieee80211_ref_node(ni);
2148
2149         m = ieee80211_getmgtframe(&frm,
2150             ic->ic_headroom + sizeof(struct ieee80211_frame),
2151             sizeof(uint16_t)    /* action+category */
2152             + sizeof(struct ieee80211_meshlmetric_ie)
2153         );
2154         if (m != NULL) {
2155                 /*
2156                  * mesh link metric reply
2157                  *   [1] category
2158                  *   [1] action
2159                  *   [tlv] mesh link metric
2160                  */
2161                 *frm++ = category;
2162                 *frm++ = action;
2163                 frm = ieee80211_add_meshlmetric(frm, *metric);
2164                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2165                 return mesh_send_action(ni, m);
2166         } else {
2167                 vap->iv_stats.is_tx_nobuf++;
2168                 ieee80211_free_node(ni);
2169                 return ENOMEM;
2170         }
2171 }
2172
2173 static void
2174 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2175 {
2176         switch (ni->ni_mlstate) {
2177         case IEEE80211_NODE_MESH_HOLDING:
2178                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2179                 break;
2180         case IEEE80211_NODE_MESH_CONFIRMRCV:
2181                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2182                 break;
2183         case IEEE80211_NODE_MESH_IDLE:
2184                 ni->ni_mltval = 0;
2185                 break;
2186         default:
2187                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
2188                 break;
2189         }
2190         if (ni->ni_mltval)
2191                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2192                     mesh_peer_timeout_cb, ni);
2193 }
2194
2195 /*
2196  * Same as above but backoffs timer statisically 50%.
2197  */
2198 static void
2199 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
2200 {
2201         uint32_t r;
2202
2203         r = arc4random();
2204         ni->ni_mltval += r % ni->ni_mltval;
2205         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
2206             ni);
2207 }
2208
2209 static __inline void
2210 mesh_peer_timeout_stop(struct ieee80211_node *ni)
2211 {
2212         callout_drain(&ni->ni_mltimer);
2213 }
2214
2215 /*
2216  * Mesh Peer Link Management FSM timeout handling.
2217  */
2218 static void
2219 mesh_peer_timeout_cb(void *arg)
2220 {
2221         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
2222         uint16_t args[3];
2223
2224         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
2225             ni, "mesh link timeout, state %d, retry counter %d",
2226             ni->ni_mlstate, ni->ni_mlrcnt);
2227
2228         switch (ni->ni_mlstate) {
2229         case IEEE80211_NODE_MESH_IDLE:
2230         case IEEE80211_NODE_MESH_ESTABLISHED:
2231                 break;
2232         case IEEE80211_NODE_MESH_OPENSNT:
2233         case IEEE80211_NODE_MESH_OPENRCV:
2234                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
2235                         args[0] = ni->ni_mlpid;
2236                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
2237                         ieee80211_send_action(ni,
2238                             IEEE80211_ACTION_CAT_MESHPEERING,
2239                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
2240                         ni->ni_mlrcnt = 0;
2241                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2242                         mesh_peer_timeout_setup(ni);
2243                 } else {
2244                         args[0] = ni->ni_mlpid;
2245                         ieee80211_send_action(ni,
2246                             IEEE80211_ACTION_CAT_MESHPEERING,
2247                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
2248                         ni->ni_mlrcnt++;
2249                         mesh_peer_timeout_backoff(ni);
2250                 }
2251                 break;
2252         case IEEE80211_NODE_MESH_CONFIRMRCV:
2253                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
2254                         args[0] = ni->ni_mlpid;
2255                         args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
2256                         ieee80211_send_action(ni,
2257                             IEEE80211_ACTION_CAT_MESHPEERING,
2258                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
2259                         ni->ni_mlrcnt = 0;
2260                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2261                         mesh_peer_timeout_setup(ni);
2262                 } else {
2263                         ni->ni_mlrcnt++;
2264                         mesh_peer_timeout_setup(ni);
2265                 }
2266                 break;
2267         case IEEE80211_NODE_MESH_HOLDING:
2268                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2269                 break;
2270         }
2271 }
2272
2273 static int
2274 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
2275 {
2276         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2277
2278         if (ie == NULL || ie[1] != ms->ms_idlen)
2279                 return 1;
2280         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
2281 }
2282
2283 /*
2284  * Check if we are using the same algorithms for this mesh.
2285  */
2286 static int
2287 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
2288 {
2289         const struct ieee80211_meshconf_ie *meshconf =
2290             (const struct ieee80211_meshconf_ie *) ie;
2291         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
2292         uint16_t cap;
2293
2294         if (meshconf == NULL)
2295                 return 1;
2296         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
2297                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2298                     "unknown path selection algorithm: 0x%x\n",
2299                     meshconf->conf_pselid);
2300                 return 1;
2301         }
2302         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
2303                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2304                     "unknown path metric algorithm: 0x%x\n",
2305                     meshconf->conf_pmetid);
2306                 return 1;
2307         }
2308         if (meshconf->conf_ccid != 0) {
2309                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2310                     "unknown congestion control algorithm: 0x%x\n",
2311                     meshconf->conf_ccid);
2312                 return 1;
2313         }
2314         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
2315                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2316                     "unknown sync algorithm: 0x%x\n",
2317                     meshconf->conf_syncid);
2318                 return 1;
2319         }
2320         if (meshconf->conf_authid != 0) {
2321                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2322                     "unknown auth auth algorithm: 0x%x\n",
2323                     meshconf->conf_pselid);
2324                 return 1;
2325         }
2326         /* NB: conf_cap is only read correctly here */
2327         cap = LE_READ_2(&meshconf->conf_cap);
2328         /* Not accepting peers */
2329         if (!(cap & IEEE80211_MESHCONF_CAP_AP)) {
2330                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
2331                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
2332                 return 1;
2333         }
2334         return 0;
2335 }
2336
2337 static int
2338 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
2339     const uint8_t *ie)
2340 {
2341         const struct ieee80211_meshpeer_ie *meshpeer =
2342             (const struct ieee80211_meshpeer_ie *) ie;
2343
2344         if (meshpeer == NULL || meshpeer->peer_len < 6 ||
2345             meshpeer->peer_len > 10)
2346                 return 1;
2347         switch (subtype) {
2348         case IEEE80211_MESH_PEER_LINK_OPEN:
2349                 if (meshpeer->peer_len != 6)
2350                         return 1;
2351                 break;
2352         case IEEE80211_MESH_PEER_LINK_CONFIRM:
2353                 if (meshpeer->peer_len != 8)
2354                         return 1;
2355                 break;
2356         case IEEE80211_MESH_PEER_LINK_CLOSE:
2357                 if (meshpeer->peer_len < 8)
2358                         return 1;
2359                 if (meshpeer->peer_len == 8 && meshpeer->peer_linkid != 0)
2360                         return 1;
2361                 if (meshpeer->peer_rcode == 0)
2362                         return 1;
2363                 break;
2364         }
2365         return 0;
2366 }
2367
2368 /*
2369  * Add a Mesh ID IE to a frame.
2370  */
2371 uint8_t *
2372 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
2373 {
2374         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2375
2376         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
2377
2378         *frm++ = IEEE80211_ELEMID_MESHID;
2379         *frm++ = ms->ms_idlen;
2380         memcpy(frm, ms->ms_id, ms->ms_idlen);
2381         return frm + ms->ms_idlen;
2382 }
2383
2384 /*
2385  * Add a Mesh Configuration IE to a frame.
2386  * For now just use HWMP routing, Airtime link metric, Null Congestion
2387  * Signaling, Null Sync Protocol and Null Authentication.
2388  */
2389 uint8_t *
2390 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
2391 {
2392         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
2393         uint16_t caps;
2394
2395         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
2396
2397         *frm++ = IEEE80211_ELEMID_MESHCONF;
2398         *frm++ = sizeof(struct ieee80211_meshconf_ie) - 2;
2399         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
2400         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
2401         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
2402         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
2403         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
2404         /* NB: set the number of neighbors before the rest */
2405         *frm = (ms->ms_neighbors > 15 ? 15 : ms->ms_neighbors) << 1;
2406         if (ms->ms_flags & IEEE80211_MESHFLAGS_PORTAL)
2407                 *frm |= IEEE80211_MESHCONF_FORM_MP;
2408         frm += 1;
2409         caps = 0;
2410         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
2411                 caps |= IEEE80211_MESHCONF_CAP_AP;
2412         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
2413                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
2414         ADDSHORT(frm, caps);
2415         return frm;
2416 }
2417
2418 /*
2419  * Add a Mesh Peer Management IE to a frame.
2420  */
2421 uint8_t *
2422 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
2423     uint16_t peerid, uint16_t reason)
2424 {
2425         /* XXX change for AH */
2426         static const uint8_t meshpeerproto[4] = IEEE80211_MESH_PEER_PROTO;
2427
2428         KASSERT(localid != 0, ("localid == 0"));
2429
2430         *frm++ = IEEE80211_ELEMID_MESHPEER;
2431         switch (subtype) {
2432         case IEEE80211_MESH_PEER_LINK_OPEN:
2433                 *frm++ = 6;             /* length */
2434                 memcpy(frm, meshpeerproto, 4);
2435                 frm += 4;
2436                 ADDSHORT(frm, localid); /* local ID */
2437                 break;
2438         case IEEE80211_MESH_PEER_LINK_CONFIRM:
2439                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
2440                 *frm++ = 8;             /* length */
2441                 memcpy(frm, meshpeerproto, 4);
2442                 frm += 4;
2443                 ADDSHORT(frm, localid); /* local ID */
2444                 ADDSHORT(frm, peerid);  /* peer ID */
2445                 break;
2446         case IEEE80211_MESH_PEER_LINK_CLOSE:
2447                 if (peerid)
2448                         *frm++ = 10;    /* length */
2449                 else
2450                         *frm++ = 8;     /* length */
2451                 memcpy(frm, meshpeerproto, 4);
2452                 frm += 4;
2453                 ADDSHORT(frm, localid); /* local ID */
2454                 if (peerid)
2455                         ADDSHORT(frm, peerid);  /* peer ID */
2456                 ADDSHORT(frm, reason);
2457                 break;
2458         }
2459         return frm;
2460 }
2461
2462 /*
2463  * Compute an Airtime Link Metric for the link with this node.
2464  *
2465  * Based on Draft 3.0 spec (11B.10, p.149).
2466  */
2467 /*
2468  * Max 802.11s overhead.
2469  */
2470 #define IEEE80211_MESH_MAXOVERHEAD \
2471         (sizeof(struct ieee80211_qosframe_addr4) \
2472          + sizeof(struct ieee80211_meshcntl_ae11) \
2473         + sizeof(struct llc) \
2474         + IEEE80211_ADDR_LEN \
2475         + IEEE80211_WEP_IVLEN \
2476         + IEEE80211_WEP_KIDLEN \
2477         + IEEE80211_WEP_CRCLEN \
2478         + IEEE80211_WEP_MICLEN \
2479         + IEEE80211_CRC_LEN)
2480 uint32_t
2481 mesh_airtime_calc(struct ieee80211_node *ni)
2482 {
2483 #define M_BITS 8
2484 #define S_FACTOR (2 * M_BITS)
2485         struct ieee80211com *ic = ni->ni_ic;
2486         struct ifnet *ifp = ni->ni_vap->iv_ifp;
2487         const static int nbits = 8192 << M_BITS;
2488         uint32_t overhead, rate, errrate;
2489         uint64_t res;
2490
2491         /* Time to transmit a frame */
2492         rate = ni->ni_txrate;
2493         overhead = ieee80211_compute_duration(ic->ic_rt,
2494             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
2495         /* Error rate in percentage */
2496         /* XXX assuming small failures are ok */
2497         errrate = (((ifp->if_oerrors +
2498             ifp->if_ierrors) / 100) << M_BITS) / 100;
2499         res = (overhead + (nbits / rate)) *
2500             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
2501
2502         return (uint32_t)(res >> S_FACTOR);
2503 #undef M_BITS
2504 #undef S_FACTOR
2505 }
2506
2507 /*
2508  * Add a Mesh Link Metric report IE to a frame.
2509  */
2510 uint8_t *
2511 ieee80211_add_meshlmetric(uint8_t *frm, uint32_t metric)
2512 {
2513         *frm++ = IEEE80211_ELEMID_MESHLINK;
2514         *frm++ = 4;
2515         ADDWORD(frm, metric);
2516         return frm;
2517 }
2518 #undef ADDSHORT
2519 #undef ADDWORD
2520
2521 /*
2522  * Initialize any mesh-specific node state.
2523  */
2524 void
2525 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
2526 {
2527         ni->ni_flags |= IEEE80211_NODE_QOS;
2528         callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE);
2529 }
2530
2531 /*
2532  * Cleanup any mesh-specific node state.
2533  */
2534 void
2535 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
2536 {
2537         struct ieee80211vap *vap = ni->ni_vap;
2538         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2539
2540         callout_drain(&ni->ni_mltimer);
2541         /* NB: short-circuit callbacks after mesh_vdetach */
2542         if (vap->iv_mesh != NULL)
2543                 ms->ms_ppath->mpp_peerdown(ni);
2544 }
2545
2546 void
2547 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
2548 {
2549         ni->ni_meshidlen = ie[1];
2550         memcpy(ni->ni_meshid, ie + 2, ie[1]);
2551 }
2552
2553 /*
2554  * Setup mesh-specific node state on neighbor discovery.
2555  */
2556 void
2557 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
2558         const struct ieee80211_frame *wh,
2559         const struct ieee80211_scanparams *sp)
2560 {
2561         ieee80211_parse_meshid(ni, sp->meshid);
2562 }
2563
2564 void
2565 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
2566         struct ieee80211_beacon_offsets *bo)
2567 {
2568         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
2569
2570         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
2571                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
2572                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
2573         }
2574 }
2575
2576 static int
2577 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
2578 {
2579         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2580         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
2581         struct ieee80211_mesh_route *rt;
2582         struct ieee80211req_mesh_route *imr;
2583         size_t len, off;
2584         uint8_t *p;
2585         int error;
2586
2587         if (vap->iv_opmode != IEEE80211_M_MBSS)
2588                 return ENOSYS;
2589
2590         error = 0;
2591         switch (ireq->i_type) {
2592         case IEEE80211_IOC_MESH_ID:
2593                 ireq->i_len = ms->ms_idlen;
2594                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
2595                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
2596                 break;
2597         case IEEE80211_IOC_MESH_AP:
2598                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
2599                 break;
2600         case IEEE80211_IOC_MESH_FWRD:
2601                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
2602                 break;
2603         case IEEE80211_IOC_MESH_TTL:
2604                 ireq->i_val = ms->ms_ttl;
2605                 break;
2606         case IEEE80211_IOC_MESH_RTCMD:
2607                 switch (ireq->i_val) {
2608                 case IEEE80211_MESH_RTCMD_LIST:
2609                         len = 0;
2610                         MESH_RT_LOCK(ms);
2611                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
2612                                 len += sizeof(*imr);
2613                         }
2614                         MESH_RT_UNLOCK(ms);
2615                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
2616                                 ireq->i_len = len;
2617                                 return ENOMEM;
2618                         }
2619                         ireq->i_len = len;
2620                         /* XXX M_WAIT? */
2621                         p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO);
2622                         if (p == NULL)
2623                                 return ENOMEM;
2624                         off = 0;
2625                         MESH_RT_LOCK(ms);
2626                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
2627                                 if (off >= len)
2628                                         break;
2629                                 imr = (struct ieee80211req_mesh_route *)
2630                                     (p + off);
2631                                 imr->imr_flags = rt->rt_flags;
2632                                 IEEE80211_ADDR_COPY(imr->imr_dest,
2633                                     rt->rt_dest);
2634                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
2635                                     rt->rt_nexthop);
2636                                 imr->imr_metric = rt->rt_metric;
2637                                 imr->imr_nhops = rt->rt_nhops;
2638                                 imr->imr_lifetime = rt->rt_lifetime;
2639                                 imr->imr_lastmseq = rt->rt_lastmseq;
2640                                 off += sizeof(*imr);
2641                         }
2642                         MESH_RT_UNLOCK(ms);
2643                         error = copyout(p, (uint8_t *)ireq->i_data,
2644                             ireq->i_len);
2645                         free(p, M_TEMP);
2646                         break;
2647                 case IEEE80211_MESH_RTCMD_FLUSH:
2648                 case IEEE80211_MESH_RTCMD_ADD:
2649                 case IEEE80211_MESH_RTCMD_DELETE:
2650                         return EINVAL;
2651                 default:
2652                         return ENOSYS;
2653                 }
2654                 break;
2655         case IEEE80211_IOC_MESH_PR_METRIC:
2656                 len = strlen(ms->ms_pmetric->mpm_descr);
2657                 if (ireq->i_len < len)
2658                         return EINVAL;
2659                 ireq->i_len = len;
2660                 error = copyout(ms->ms_pmetric->mpm_descr,
2661                     (uint8_t *)ireq->i_data, len);
2662                 break;
2663         case IEEE80211_IOC_MESH_PR_PATH:
2664                 len = strlen(ms->ms_ppath->mpp_descr);
2665                 if (ireq->i_len < len)
2666                         return EINVAL;
2667                 ireq->i_len = len;
2668                 error = copyout(ms->ms_ppath->mpp_descr,
2669                     (uint8_t *)ireq->i_data, len);
2670                 break;
2671         default:
2672                 return ENOSYS;
2673         }
2674
2675         return error;
2676 }
2677 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
2678
2679 static int
2680 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
2681 {
2682         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2683         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
2684         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
2685         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
2686         int error;
2687
2688         if (vap->iv_opmode != IEEE80211_M_MBSS)
2689                 return ENOSYS;
2690
2691         error = 0;
2692         switch (ireq->i_type) {
2693         case IEEE80211_IOC_MESH_ID:
2694                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
2695                         return EINVAL;
2696                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
2697                 if (error != 0)
2698                         break;
2699                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
2700                 ms->ms_idlen = ireq->i_len;
2701                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
2702                 error = ENETRESET;
2703                 break;
2704         case IEEE80211_IOC_MESH_AP:
2705                 if (ireq->i_val)
2706                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
2707                 else
2708                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
2709                 error = ENETRESET;
2710                 break;
2711         case IEEE80211_IOC_MESH_FWRD:
2712                 if (ireq->i_val)
2713                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
2714                 else
2715                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
2716                 break;
2717         case IEEE80211_IOC_MESH_TTL:
2718                 ms->ms_ttl = (uint8_t) ireq->i_val;
2719                 break;
2720         case IEEE80211_IOC_MESH_RTCMD:
2721                 switch (ireq->i_val) {
2722                 case IEEE80211_MESH_RTCMD_LIST:
2723                         return EINVAL;
2724                 case IEEE80211_MESH_RTCMD_FLUSH:
2725                         ieee80211_mesh_rt_flush(vap);
2726                         break;
2727                 case IEEE80211_MESH_RTCMD_ADD:
2728                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
2729                             IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
2730                                 return EINVAL;
2731                         error = copyin(ireq->i_data, &tmpaddr,
2732                             IEEE80211_ADDR_LEN);
2733                         if (error == 0)
2734                                 ieee80211_mesh_discover(vap, tmpaddr, NULL);
2735                         break;
2736                 case IEEE80211_MESH_RTCMD_DELETE:
2737                         ieee80211_mesh_rt_del(vap, ireq->i_data);
2738                         break;
2739                 default:
2740                         return ENOSYS;
2741                 }
2742                 break;
2743         case IEEE80211_IOC_MESH_PR_METRIC:
2744                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
2745                 if (error == 0) {
2746                         error = mesh_select_proto_metric(vap, tmpproto);
2747                         if (error == 0)
2748                                 error = ENETRESET;
2749                 }
2750                 break;
2751         case IEEE80211_IOC_MESH_PR_PATH:
2752                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
2753                 if (error == 0) {
2754                         error = mesh_select_proto_path(vap, tmpproto);
2755                         if (error == 0)
2756                                 error = ENETRESET;
2757                 }
2758                 break;
2759         default:
2760                 return ENOSYS;
2761         }
2762         return error;
2763 }
2764 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);