sys/net80211/ieee80211_mesh.c

   1 /*-
   2  * Copyright (c) 2009 The FreeBSD Foundation
   3  * All rights reserved.
   4  *
   5  * This software was developed by Rui Paulo under sponsorship from the
   6  * FreeBSD Foundation.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 #include <sys/cdefs.h>
  30 #ifdef __FreeBSD__
  31 __FBSDID("$FreeBSD$");
  32 #endif
  33
  34 /*
  35  * IEEE 802.11s Mesh Point (MBSS) support.
  36  *
  37  * Based on March 2009, D3.0 802.11s draft spec.
  38  */
  39 #include "opt_inet.h"
  40 #include "opt_wlan.h"
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/malloc.h>
  46 #include <sys/kernel.h>
  47
  48 #include <sys/socket.h>
  49 #include <sys/sockio.h>
  50 #include <sys/endian.h>
  51 #include <sys/errno.h>
  52 #include <sys/proc.h>
  53 #include <sys/sysctl.h>
  54
  55 #include <net/bpf.h>
  56 #include <net/if.h>
  57 #include <net/if_media.h>
  58 #include <net/if_llc.h>
  59 #include <net/ethernet.h>
  60
  61 #include <net80211/ieee80211_var.h>
  62 #include <net80211/ieee80211_action.h>
  63 #ifdef IEEE80211_SUPPORT_SUPERG
  64 #include <net80211/ieee80211_superg.h>
  65 #endif
  66 #include <net80211/ieee80211_input.h>
  67 #include <net80211/ieee80211_mesh.h>
  68
  69 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
  70 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
  71 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
  72 static void     mesh_vattach(struct ieee80211vap *);
  73 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  74 static void     mesh_rt_cleanup_cb(void *);
  75 static void     mesh_gatemode_setup(struct ieee80211vap *);
  76 static void     mesh_gatemode_cb(void *);
  77 static void     mesh_linkchange(struct ieee80211_node *,
  78                     enum ieee80211_mesh_mlstate);
  79 static void     mesh_checkid(void *, struct ieee80211_node *);
  80 static uint32_t mesh_generateid(struct ieee80211vap *);
  81 static int      mesh_checkpseq(struct ieee80211vap *,
  82                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
  83 static void     mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
  84                     struct ieee80211_mesh_route *);
  85 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
  86                     const struct ieee80211_meshcntl *);
  87 static int      mesh_input(struct ieee80211_node *, struct mbuf *, int, int);
  88 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
  89                     int, int);
  90 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  91 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
  92 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
  93 static void     mesh_peer_timeout_cb(void *);
  94 static __inline void
  95                 mesh_peer_timeout_stop(struct ieee80211_node *);
  96 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
  97 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
  98 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
  99                     const uint8_t *);
 100 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
 101
 102 /*
 103  * Timeout values come from the specification and are in milliseconds.
 104  */
 105 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
 106     "IEEE 802.11s parameters");
 107 static int      ieee80211_mesh_gateint = -1;
 108 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW,
 109     &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
 110     "mesh gate interval (ms)");
 111 static int ieee80211_mesh_retrytimeout = -1;
 112 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
 113     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 114     "Retry timeout (msec)");
 115 static int ieee80211_mesh_holdingtimeout = -1;
 116
 117 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
 118     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 119     "Holding state timeout (msec)");
 120 static int ieee80211_mesh_confirmtimeout = -1;
 121 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
 122     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 123     "Confirm state timeout (msec)");
 124 static int ieee80211_mesh_backofftimeout = -1;
 125 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW,
 126     &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 127     "Backoff timeout (msec). This is to throutles peering forever when "
 128     "not receving answer or is rejected by a neighbor");
 129 static int ieee80211_mesh_maxretries = 2;
 130 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW,
 131     &ieee80211_mesh_maxretries, 0,
 132     "Maximum retries during peer link establishment");
 133 static int ieee80211_mesh_maxholding = 2;
 134 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLTYPE_INT | CTLFLAG_RW,
 135     &ieee80211_mesh_maxholding, 0,
 136     "Maximum times we are allowed to transition to HOLDING state before "
 137     "backinoff during peer link establishment");
 138
 139 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
 140         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 141
 142 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
 143 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
 144 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
 145 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
 146 static  ieee80211_recv_action_func mesh_recv_action_meshgate;
 147
 148 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
 149 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
 150 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
 151 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
 152 static  ieee80211_send_action_func mesh_send_action_meshgate;
 153
 154 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
 155         .mpm_descr      = "AIRTIME",
 156         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
 157         .mpm_metric     = mesh_airtime_calc,
 158 };
 159
 160 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
 161 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
 162
 163 #define RT_ENTRY_LOCK(rt)       mtx_lock(&(rt)->rt_lock)
 164 #define RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED)
 165 #define RT_ENTRY_UNLOCK(rt)     mtx_unlock(&(rt)->rt_lock)
 166
 167 #define MESH_RT_LOCK(ms)        mtx_lock(&(ms)->ms_rt_lock)
 168 #define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED)
 169 #define MESH_RT_UNLOCK(ms)      mtx_unlock(&(ms)->ms_rt_lock)
 170
 171 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
 172 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
 173 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
 174
 175 /* The longer one of the lifetime should be stored as new lifetime */
 176 #define MESH_ROUTE_LIFETIME_MAX(a, b)   (a > b ? a : b)
 177
 178 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
 179 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
 180
 181 /*
 182  * Helper functions to manipulate the Mesh routing table.
 183  */
 184
 185 static struct ieee80211_mesh_route *
 186 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
 187     const uint8_t dest[IEEE80211_ADDR_LEN])
 188 {
 189         struct ieee80211_mesh_route *rt;
 190
 191         MESH_RT_LOCK_ASSERT(ms);
 192
 193         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 194                 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
 195                         return rt;
 196         }
 197         return NULL;
 198 }
 199
 200 static struct ieee80211_mesh_route *
 201 mesh_rt_add_locked(struct ieee80211vap *vap,
 202     const uint8_t dest[IEEE80211_ADDR_LEN])
 203 {
 204         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 205         struct ieee80211_mesh_route *rt;
 206
 207         KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
 208             ("%s: adding broadcast to the routing table", __func__));
 209
 210         MESH_RT_LOCK_ASSERT(ms);
 211
 212         rt = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) +
 213             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | M_ZERO);
 214         if (rt != NULL) {
 215                 rt->rt_vap = vap;
 216                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
 217                 rt->rt_priv = (void *)ALIGN(&rt[1]);
 218                 mtx_init(&rt->rt_lock, "MBSS_RT", "802.11s route entry", MTX_DEF);
 219                 callout_init(&rt->rt_discovery, CALLOUT_MPSAFE);
 220                 rt->rt_updtime = ticks; /* create time */
 221                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
 222         }
 223         return rt;
 224 }
 225
 226 struct ieee80211_mesh_route *
 227 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
 228     const uint8_t dest[IEEE80211_ADDR_LEN])
 229 {
 230         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 231         struct ieee80211_mesh_route *rt;
 232
 233         MESH_RT_LOCK(ms);
 234         rt = mesh_rt_find_locked(ms, dest);
 235         MESH_RT_UNLOCK(ms);
 236         return rt;
 237 }
 238
 239 struct ieee80211_mesh_route *
 240 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
 241     const uint8_t dest[IEEE80211_ADDR_LEN])
 242 {
 243         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 244         struct ieee80211_mesh_route *rt;
 245
 246         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
 247             ("%s: duplicate entry in the routing table", __func__));
 248         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
 249             ("%s: adding self to the routing table", __func__));
 250
 251         MESH_RT_LOCK(ms);
 252         rt = mesh_rt_add_locked(vap, dest);
 253         MESH_RT_UNLOCK(ms);
 254         return rt;
 255 }
 256
 257 /*
 258  * Update the route lifetime and returns the updated lifetime.
 259  * If new_lifetime is zero and route is timedout it will be invalidated.
 260  * new_lifetime is in msec
 261  */
 262 int
 263 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
 264 {
 265         int timesince, now;
 266         uint32_t lifetime = 0;
 267
 268         KASSERT(rt != NULL, ("route is NULL"));
 269
 270         now = ticks;
 271         RT_ENTRY_LOCK(rt);
 272
 273         /* dont clobber a proxy entry gated by us */
 274         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
 275                 RT_ENTRY_UNLOCK(rt);
 276                 return rt->rt_lifetime;
 277         }
 278
 279         timesince = ticks_to_msecs(now - rt->rt_updtime);
 280         rt->rt_updtime = now;
 281         if (timesince >= rt->rt_lifetime) {
 282                 if (new_lifetime != 0) {
 283                         rt->rt_lifetime = new_lifetime;
 284                 }
 285                 else {
 286                         rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
 287                         rt->rt_lifetime = 0;
 288                 }
 289         } else {
 290                 /* update what is left of lifetime */
 291                 rt->rt_lifetime = rt->rt_lifetime - timesince;
 292                 rt->rt_lifetime  = MESH_ROUTE_LIFETIME_MAX(
 293                         new_lifetime, rt->rt_lifetime);
 294         }
 295         lifetime = rt->rt_lifetime;
 296         RT_ENTRY_UNLOCK(rt);
 297
 298         return lifetime;
 299 }
 300
 301 /*
 302  * Add a proxy route (as needed) for the specified destination.
 303  */
 304 void
 305 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
 306     const uint8_t dest[IEEE80211_ADDR_LEN])
 307 {
 308         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 309         struct ieee80211_mesh_route *rt;
 310
 311         MESH_RT_LOCK(ms);
 312         rt = mesh_rt_find_locked(ms, dest);
 313         if (rt == NULL) {
 314                 rt = mesh_rt_add_locked(vap, dest);
 315                 if (rt == NULL) {
 316                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 317                             "%s", "unable to add proxy entry");
 318                         vap->iv_stats.is_mesh_rtaddfailed++;
 319                 } else {
 320                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 321                             "%s", "add proxy entry");
 322                         IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
 323                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 324                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 325                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
 326                 }
 327         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 328                 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
 329                     ("no proxy flag for poxy entry"));
 330                 struct ieee80211com *ic = vap->iv_ic;
 331                 /*
 332                  * Fix existing entry created by received frames from
 333                  * stations that have some memory of dest.  We also
 334                  * flush any frames held on the staging queue; delivering
 335                  * them is too much trouble right now.
 336                  */
 337                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 338                     "%s", "fix proxy entry");
 339                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 340                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 341                              |  IEEE80211_MESHRT_FLAGS_PROXY;
 342                 /* XXX belongs in hwmp */
 343                 ieee80211_ageq_drain_node(&ic->ic_stageq,
 344                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
 345                 /* XXX stat? */
 346         }
 347         MESH_RT_UNLOCK(ms);
 348 }
 349
 350 static __inline void
 351 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
 352 {
 353         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
 354         /*
 355          * Grab the lock before destroying it, to be sure no one else
 356          * is holding the route.
 357          */
 358         RT_ENTRY_LOCK(rt);
 359         callout_drain(&rt->rt_discovery);
 360         mtx_destroy(&rt->rt_lock);
 361         free(rt, M_80211_MESH_RT);
 362 }
 363
 364 void
 365 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
 366     const uint8_t dest[IEEE80211_ADDR_LEN])
 367 {
 368         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 369         struct ieee80211_mesh_route *rt, *next;
 370
 371         MESH_RT_LOCK(ms);
 372         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 373                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
 374                         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
 375                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 376                                     IEEE80211_REASON_MESH_PERR_NO_PROXY);
 377                         } else {
 378                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 379                                     IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
 380                         }
 381                         mesh_rt_del(ms, rt);
 382                         MESH_RT_UNLOCK(ms);
 383                         return;
 384                 }
 385         }
 386         MESH_RT_UNLOCK(ms);
 387 }
 388
 389 void
 390 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
 391 {
 392         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 393         struct ieee80211_mesh_route *rt, *next;
 394
 395         if (ms == NULL)
 396                 return;
 397         MESH_RT_LOCK(ms);
 398         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
 399                 mesh_rt_del(ms, rt);
 400         MESH_RT_UNLOCK(ms);
 401 }
 402
 403 void
 404 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
 405     const uint8_t peer[IEEE80211_ADDR_LEN])
 406 {
 407         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 408         struct ieee80211_mesh_route *rt, *next;
 409
 410         MESH_RT_LOCK(ms);
 411         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 412                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
 413                         mesh_rt_del(ms, rt);
 414         }
 415         MESH_RT_UNLOCK(ms);
 416 }
 417
 418 /*
 419  * Flush expired routing entries, i.e. those in invalid state for
 420  * some time.
 421  */
 422 static void
 423 mesh_rt_flush_invalid(struct ieee80211vap *vap)
 424 {
 425         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 426         struct ieee80211_mesh_route *rt, *next;
 427
 428         if (ms == NULL)
 429                 return;
 430         MESH_RT_LOCK(ms);
 431         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 432                 /* Discover paths will be deleted by their own callout */
 433                 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
 434                         continue;
 435                 ieee80211_mesh_rt_update(rt, 0);
 436                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
 437                         mesh_rt_del(ms, rt);
 438         }
 439         MESH_RT_UNLOCK(ms);
 440 }
 441
 442 #define N(a)    (sizeof(a) / sizeof(a[0]))
 443 int
 444 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
 445 {
 446         int i, firstempty = -1;
 447
 448         for (i = 0; i < N(mesh_proto_paths); i++) {
 449                 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
 450                     IEEE80211_MESH_PROTO_DSZ) == 0)
 451                         return EEXIST;
 452                 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
 453                         firstempty = i;
 454         }
 455         if (firstempty < 0)
 456                 return ENOSPC;
 457         memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
 458         mesh_proto_paths[firstempty].mpp_active = 1;
 459         return 0;
 460 }
 461
 462 int
 463 ieee80211_mesh_register_proto_metric(const struct
 464     ieee80211_mesh_proto_metric *mpm)
 465 {
 466         int i, firstempty = -1;
 467
 468         for (i = 0; i < N(mesh_proto_metrics); i++) {
 469                 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
 470                     IEEE80211_MESH_PROTO_DSZ) == 0)
 471                         return EEXIST;
 472                 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
 473                         firstempty = i;
 474         }
 475         if (firstempty < 0)
 476                 return ENOSPC;
 477         memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
 478         mesh_proto_metrics[firstempty].mpm_active = 1;
 479         return 0;
 480 }
 481
 482 static int
 483 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
 484 {
 485         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 486         int i;
 487
 488         for (i = 0; i < N(mesh_proto_paths); i++) {
 489                 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
 490                         ms->ms_ppath = &mesh_proto_paths[i];
 491                         return 0;
 492                 }
 493         }
 494         return ENOENT;
 495 }
 496
 497 static int
 498 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
 499 {
 500         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 501         int i;
 502
 503         for (i = 0; i < N(mesh_proto_metrics); i++) {
 504                 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
 505                         ms->ms_pmetric = &mesh_proto_metrics[i];
 506                         return 0;
 507                 }
 508         }
 509         return ENOENT;
 510 }
 511 #undef  N
 512
 513 static void
 514 mesh_gatemode_setup(struct ieee80211vap *vap)
 515 {
 516         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 517
 518         /*
 519          * NB: When a mesh gate is running as a ROOT it shall
 520          * not send out periodic GANNs but instead mark the
 521          * mesh gate flag for the corresponding proactive PREQ
 522          * and RANN frames.
 523          */
 524         if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
 525             (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
 526                 callout_drain(&ms->ms_gatetimer);
 527                 return ;
 528         }
 529         callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
 530             mesh_gatemode_cb, vap);
 531 }
 532
 533 static void
 534 mesh_gatemode_cb(void *arg)
 535 {
 536         struct ieee80211vap *vap = (struct ieee80211vap *)arg;
 537         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 538         struct ieee80211_meshgann_ie gann;
 539
 540         gann.gann_flags = 0; /* Reserved */
 541         gann.gann_hopcount = 0;
 542         gann.gann_ttl = ms->ms_ttl;
 543         IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
 544         gann.gann_seq = ms->ms_gateseq++;
 545         gann.gann_interval = ieee80211_mesh_gateint;
 546
 547         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
 548             "send broadcast GANN (seq %u)", gann.gann_seq);
 549
 550         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
 551             IEEE80211_ACTION_MESH_GANN, &gann);
 552         mesh_gatemode_setup(vap);
 553 }
 554
 555 static void
 556 ieee80211_mesh_init(void)
 557 {
 558
 559         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
 560         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
 561
 562         /*
 563          * Setup mesh parameters that depends on the clock frequency.
 564          */
 565         ieee80211_mesh_gateint = msecs_to_ticks(10000);
 566         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
 567         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
 568         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
 569         ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
 570
 571         /*
 572          * Register action frame handlers.
 573          */
 574         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 575             IEEE80211_ACTION_MESHPEERING_OPEN,
 576             mesh_recv_action_meshpeering_open);
 577         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 578             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 579             mesh_recv_action_meshpeering_confirm);
 580         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 581             IEEE80211_ACTION_MESHPEERING_CLOSE,
 582             mesh_recv_action_meshpeering_close);
 583         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 584             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
 585         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 586             IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
 587
 588         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 589             IEEE80211_ACTION_MESHPEERING_OPEN,
 590             mesh_send_action_meshpeering_open);
 591         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 592             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 593             mesh_send_action_meshpeering_confirm);
 594         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 595             IEEE80211_ACTION_MESHPEERING_CLOSE,
 596             mesh_send_action_meshpeering_close);
 597         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 598             IEEE80211_ACTION_MESH_LMETRIC,
 599             mesh_send_action_meshlmetric);
 600         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 601             IEEE80211_ACTION_MESH_GANN,
 602             mesh_send_action_meshgate);
 603
 604         /*
 605          * Register Airtime Link Metric.
 606          */
 607         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
 608
 609 }
 610 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
 611
 612 void
 613 ieee80211_mesh_attach(struct ieee80211com *ic)
 614 {
 615         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
 616 }
 617
 618 void
 619 ieee80211_mesh_detach(struct ieee80211com *ic)
 620 {
 621 }
 622
 623 static void
 624 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
 625 {
 626         struct ieee80211com *ic = ni->ni_ic;
 627         uint16_t args[3];
 628
 629         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
 630                 args[0] = ni->ni_mlpid;
 631                 args[1] = ni->ni_mllid;
 632                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 633                 ieee80211_send_action(ni,
 634                     IEEE80211_ACTION_CAT_SELF_PROT,
 635                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 636                     args);
 637         }
 638         callout_drain(&ni->ni_mltimer);
 639         /* XXX belongs in hwmp */
 640         ieee80211_ageq_drain_node(&ic->ic_stageq,
 641            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
 642 }
 643
 644 static void
 645 mesh_vdetach(struct ieee80211vap *vap)
 646 {
 647         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 648
 649         callout_drain(&ms->ms_cleantimer);
 650         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
 651             NULL);
 652         ieee80211_mesh_rt_flush(vap);
 653         mtx_destroy(&ms->ms_rt_lock);
 654         ms->ms_ppath->mpp_vdetach(vap);
 655         free(vap->iv_mesh, M_80211_VAP);
 656         vap->iv_mesh = NULL;
 657 }
 658
 659 static void
 660 mesh_vattach(struct ieee80211vap *vap)
 661 {
 662         struct ieee80211_mesh_state *ms;
 663         vap->iv_newstate = mesh_newstate;
 664         vap->iv_input = mesh_input;
 665         vap->iv_opdetach = mesh_vdetach;
 666         vap->iv_recv_mgmt = mesh_recv_mgmt;
 667         vap->iv_recv_ctl = mesh_recv_ctl;
 668         ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
 669             M_NOWAIT | M_ZERO);
 670         if (ms == NULL) {
 671                 printf("%s: couldn't alloc MBSS state\n", __func__);
 672                 return;
 673         }
 674         vap->iv_mesh = ms;
 675         ms->ms_seq = 0;
 676         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
 677         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
 678         TAILQ_INIT(&ms->ms_known_gates);
 679         TAILQ_INIT(&ms->ms_routes);
 680         mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF);
 681         callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE);
 682         callout_init(&ms->ms_gatetimer, CALLOUT_MPSAFE);
 683         ms->ms_gateseq = 0;
 684         mesh_select_proto_metric(vap, "AIRTIME");
 685         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
 686         mesh_select_proto_path(vap, "HWMP");
 687         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
 688         ms->ms_ppath->mpp_vattach(vap);
 689 }
 690
 691 /*
 692  * IEEE80211_M_MBSS vap state machine handler.
 693  */
 694 static int
 695 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 696 {
 697         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 698         struct ieee80211com *ic = vap->iv_ic;
 699         struct ieee80211_node *ni;
 700         enum ieee80211_state ostate;
 701
 702         IEEE80211_LOCK_ASSERT(ic);
 703
 704         ostate = vap->iv_state;
 705         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 706             __func__, ieee80211_state_name[ostate],
 707             ieee80211_state_name[nstate], arg);
 708         vap->iv_state = nstate;         /* state transition */
 709         if (ostate != IEEE80211_S_SCAN)
 710                 ieee80211_cancel_scan(vap);     /* background scan */
 711         ni = vap->iv_bss;                       /* NB: no reference held */
 712         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
 713                 callout_drain(&ms->ms_cleantimer);
 714                 callout_drain(&ms->ms_gatetimer);
 715         }
 716         switch (nstate) {
 717         case IEEE80211_S_INIT:
 718                 switch (ostate) {
 719                 case IEEE80211_S_SCAN:
 720                         ieee80211_cancel_scan(vap);
 721                         break;
 722                 case IEEE80211_S_CAC:
 723                         ieee80211_dfs_cac_stop(vap);
 724                         break;
 725                 case IEEE80211_S_RUN:
 726                         ieee80211_iterate_nodes(&ic->ic_sta,
 727                             mesh_vdetach_peers, NULL);
 728                         break;
 729                 default:
 730                         break;
 731                 }
 732                 if (ostate != IEEE80211_S_INIT) {
 733                         /* NB: optimize INIT -> INIT case */
 734                         ieee80211_reset_bss(vap);
 735                         ieee80211_mesh_rt_flush(vap);
 736                 }
 737                 break;
 738         case IEEE80211_S_SCAN:
 739                 switch (ostate) {
 740                 case IEEE80211_S_INIT:
 741                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 742                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
 743                             ms->ms_idlen != 0) {
 744                                 /*
 745                                  * Already have a channel and a mesh ID; bypass
 746                                  * the scan and startup immediately.
 747                                  */
 748                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 749                                 break;
 750                         }
 751                         /*
 752                          * Initiate a scan.  We can come here as a result
 753                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 754                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 755                          * and the scan request parameters will be present
 756                          * in iv_scanreq.  Otherwise we do the default.
 757                         */
 758                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 759                                 ieee80211_check_scan(vap,
 760                                     vap->iv_scanreq_flags,
 761                                     vap->iv_scanreq_duration,
 762                                     vap->iv_scanreq_mindwell,
 763                                     vap->iv_scanreq_maxdwell,
 764                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 765                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 766                         } else
 767                                 ieee80211_check_scan_current(vap);
 768                         break;
 769                 default:
 770                         break;
 771                 }
 772                 break;
 773         case IEEE80211_S_CAC:
 774                 /*
 775                  * Start CAC on a DFS channel.  We come here when starting
 776                  * a bss on a DFS channel (see ieee80211_create_ibss).
 777                  */
 778                 ieee80211_dfs_cac_start(vap);
 779                 break;
 780         case IEEE80211_S_RUN:
 781                 switch (ostate) {
 782                 case IEEE80211_S_INIT:
 783                         /*
 784                          * Already have a channel; bypass the
 785                          * scan and startup immediately.
 786                          * Note that ieee80211_create_ibss will call
 787                          * back to do a RUN->RUN state change.
 788                          */
 789                         ieee80211_create_ibss(vap,
 790                             ieee80211_ht_adjust_channel(ic,
 791                                 ic->ic_curchan, vap->iv_flags_ht));
 792                         /* NB: iv_bss is changed on return */
 793                         break;
 794                 case IEEE80211_S_CAC:
 795                         /*
 796                          * NB: This is the normal state change when CAC
 797                          * expires and no radar was detected; no need to
 798                          * clear the CAC timer as it's already expired.
 799                          */
 800                         /* fall thru... */
 801                 case IEEE80211_S_CSA:
 802 #if 0
 803                         /*
 804                          * Shorten inactivity timer of associated stations
 805                          * to weed out sta's that don't follow a CSA.
 806                          */
 807                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 808 #endif
 809                         /*
 810                          * Update bss node channel to reflect where
 811                          * we landed after CSA.
 812                          */
 813                         ieee80211_node_set_chan(vap->iv_bss,
 814                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 815                                 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
 816                         /* XXX bypass debug msgs */
 817                         break;
 818                 case IEEE80211_S_SCAN:
 819                 case IEEE80211_S_RUN:
 820 #ifdef IEEE80211_DEBUG
 821                         if (ieee80211_msg_debug(vap)) {
 822                                 struct ieee80211_node *ni = vap->iv_bss;
 823                                 ieee80211_note(vap,
 824                                     "synchronized with %s meshid ",
 825                                     ether_sprintf(ni->ni_meshid));
 826                                 ieee80211_print_essid(ni->ni_meshid,
 827                                     ni->ni_meshidlen);
 828                                 /* XXX MCS/HT */
 829                                 printf(" channel %d\n",
 830                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
 831                         }
 832 #endif
 833                         break;
 834                 default:
 835                         break;
 836                 }
 837                 ieee80211_node_authorize(vap->iv_bss);
 838                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 839                     mesh_rt_cleanup_cb, vap);
 840                 mesh_gatemode_setup(vap);
 841                 break;
 842         default:
 843                 break;
 844         }
 845         /* NB: ostate not nstate */
 846         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
 847         return 0;
 848 }
 849
 850 static void
 851 mesh_rt_cleanup_cb(void *arg)
 852 {
 853         struct ieee80211vap *vap = arg;
 854         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 855
 856         mesh_rt_flush_invalid(vap);
 857         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 858             mesh_rt_cleanup_cb, vap);
 859 }
 860
 861 /*
 862  * Mark a mesh STA as gate and return a pointer to it.
 863  * If this is first time, we create a new gate route.
 864  * Always update the path route to this mesh gate.
 865  */
 866 struct ieee80211_mesh_gate_route *
 867 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
 868     struct ieee80211_mesh_route *rt)
 869 {
 870         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 871         struct ieee80211_mesh_gate_route *gr = NULL, *next;
 872         int found = 0;
 873
 874         MESH_RT_LOCK(ms);
 875         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
 876                 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
 877                         found = 1;
 878                         break;
 879                 }
 880         }
 881
 882         if (!found) {
 883                 /* New mesh gate add it to known table. */
 884                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
 885                     "%s", "stored new gate information from pro-PREQ.");
 886                 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
 887                     M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO);
 888                 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
 889                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
 890         }
 891         gr->gr_route = rt;
 892         /* TODO: link from path route to gate route */
 893         MESH_RT_UNLOCK(ms);
 894
 895         return gr;
 896 }
 897
 898
 899 /*
 900  * Helper function to note the Mesh Peer Link FSM change.
 901  */
 902 static void
 903 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
 904 {
 905         struct ieee80211vap *vap = ni->ni_vap;
 906         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 907 #ifdef IEEE80211_DEBUG
 908         static const char *meshlinkstates[] = {
 909                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
 910                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
 911                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
 912                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
 913                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
 914                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
 915         };
 916 #endif
 917         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
 918             ni, "peer link: %s -> %s",
 919             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
 920
 921         /* track neighbor count */
 922         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
 923             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 924                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
 925                 ms->ms_neighbors++;
 926                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 927         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
 928             state != IEEE80211_NODE_MESH_ESTABLISHED) {
 929                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
 930                 ms->ms_neighbors--;
 931                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 932         }
 933         ni->ni_mlstate = state;
 934         switch (state) {
 935         case IEEE80211_NODE_MESH_HOLDING:
 936                 ms->ms_ppath->mpp_peerdown(ni);
 937                 break;
 938         case IEEE80211_NODE_MESH_ESTABLISHED:
 939                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
 940                 break;
 941         default:
 942                 break;
 943         }
 944 }
 945
 946 /*
 947  * Helper function to generate a unique local ID required for mesh
 948  * peer establishment.
 949  */
 950 static void
 951 mesh_checkid(void *arg, struct ieee80211_node *ni)
 952 {
 953         uint16_t *r = arg;
 954
 955         if (*r == ni->ni_mllid)
 956                 *(uint16_t *)arg = 0;
 957 }
 958
 959 static uint32_t
 960 mesh_generateid(struct ieee80211vap *vap)
 961 {
 962         int maxiter = 4;
 963         uint16_t r;
 964
 965         do {
 966                 get_random_bytes(&r, 2);
 967                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
 968                 maxiter--;
 969         } while (r == 0 && maxiter > 0);
 970         return r;
 971 }
 972
 973 /*
 974  * Verifies if we already received this packet by checking its
 975  * sequence number.
 976  * Returns 0 if the frame is to be accepted, 1 otherwise.
 977  */
 978 static int
 979 mesh_checkpseq(struct ieee80211vap *vap,
 980     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
 981 {
 982         struct ieee80211_mesh_route *rt;
 983
 984         rt = ieee80211_mesh_rt_find(vap, source);
 985         if (rt == NULL) {
 986                 rt = ieee80211_mesh_rt_add(vap, source);
 987                 if (rt == NULL) {
 988                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 989                             "%s", "add mcast route failed");
 990                         vap->iv_stats.is_mesh_rtaddfailed++;
 991                         return 1;
 992                 }
 993                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 994                     "add mcast route, mesh seqno %d", seq);
 995                 rt->rt_lastmseq = seq;
 996                 return 0;
 997         }
 998         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
 999                 return 1;
1000         } else {
1001                 rt->rt_lastmseq = seq;
1002                 return 0;
1003         }
1004 }
1005
1006 /*
1007  * Iterate the routing table and locate the next hop.
1008  */
1009 struct ieee80211_node *
1010 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1011     const uint8_t dest[IEEE80211_ADDR_LEN])
1012 {
1013         struct ieee80211_mesh_route *rt;
1014
1015         rt = ieee80211_mesh_rt_find(vap, dest);
1016         if (rt == NULL)
1017                 return NULL;
1018         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1019                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1020                     "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1021                 /* XXX stat */
1022                 return NULL;
1023         }
1024         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1025                 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1026                 if (rt == NULL) return NULL;
1027                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1028                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1029                             "%s: meshgate !valid, flags 0x%x", __func__,
1030                             rt->rt_flags);
1031                         /* XXX stat */
1032                         return NULL;
1033                 }
1034         }
1035         return ieee80211_find_txnode(vap, rt->rt_nexthop);
1036 }
1037
1038 static void
1039 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1040     struct ieee80211_mesh_route *rt_gate)
1041 {
1042         struct ifnet *ifp = vap->iv_ifp;
1043         struct ieee80211com *ic = vap->iv_ic;
1044         struct ifnet *parent = ic->ic_ifp;
1045         struct ieee80211_node *ni;
1046         struct ether_header *eh;
1047         int error;
1048
1049         eh = mtod(m, struct ether_header *);
1050         ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1051         if (ni == NULL) {
1052                 ifp->if_oerrors++;
1053                 m_freem(m);
1054                 return;
1055         }
1056
1057         if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) &&
1058             (m->m_flags & M_PWR_SAV) == 0) {
1059                 /*
1060                  * Station in power save mode; pass the frame
1061                  * to the 802.11 layer and continue.  We'll get
1062                  * the frame back when the time is right.
1063                  * XXX lose WDS vap linkage?
1064                  */
1065                 (void) ieee80211_pwrsave(ni, m);
1066                 ieee80211_free_node(ni);
1067                 return;
1068         }
1069
1070         /* calculate priority so drivers can find the tx queue */
1071         if (ieee80211_classify(ni, m)) {
1072                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_OUTPUT,
1073                         eh->ether_dhost, NULL,
1074                         "%s", "classification failure");
1075                 vap->iv_stats.is_tx_classify++;
1076                 ifp->if_oerrors++;
1077                 m_freem(m);
1078                 ieee80211_free_node(ni);
1079                 return;
1080         }
1081         /*
1082          * Stash the node pointer.  Note that we do this after
1083          * any call to ieee80211_dwds_mcast because that code
1084          * uses any existing value for rcvif to identify the
1085          * interface it (might have been) received on.
1086          */
1087         m->m_pkthdr.rcvif = (void *)ni;
1088
1089         BPF_MTAP(ifp, m);               /* 802.3 tx */
1090
1091         /*
1092          * Check if A-MPDU tx aggregation is setup or if we
1093          * should try to enable it.  The sta must be associated
1094          * with HT and A-MPDU enabled for use.  When the policy
1095          * routine decides we should enable A-MPDU we issue an
1096          * ADDBA request and wait for a reply.  The frame being
1097          * encapsulated will go out w/o using A-MPDU, or possibly
1098          * it might be collected by the driver and held/retransmit.
1099          * The default ic_ampdu_enable routine handles staggering
1100          * ADDBA requests in case the receiver NAK's us or we are
1101          * otherwise unable to establish a BA stream.
1102          */
1103         if ((ni->ni_flags & IEEE80211_NODE_AMPDU_TX) &&
1104             (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_TX) &&
1105             (m->m_flags & M_EAPOL) == 0) {
1106                 int tid = WME_AC_TO_TID(M_WME_GETAC(m));
1107                 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[tid];
1108
1109                 ieee80211_txampdu_count_packet(tap);
1110                 if (IEEE80211_AMPDU_RUNNING(tap)) {
1111                         /*
1112                          * Operational, mark frame for aggregation.
1113                          *
1114                          * XXX do tx aggregation here
1115                          */
1116                         m->m_flags |= M_AMPDU_MPDU;
1117                 } else if (!IEEE80211_AMPDU_REQUESTED(tap) &&
1118                         ic->ic_ampdu_enable(ni, tap)) {
1119                         /*
1120                          * Not negotiated yet, request service.
1121                          */
1122                         ieee80211_ampdu_request(ni, tap);
1123                         /* XXX hold frame for reply? */
1124                 }
1125         }
1126 #ifdef IEEE80211_SUPPORT_SUPERG
1127         else if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF)) {
1128                 m = ieee80211_ff_check(ni, m);
1129                 if (m == NULL) {
1130                         /* NB: any ni ref held on stageq */
1131                         return;
1132                 }
1133         }
1134 #endif /* IEEE80211_SUPPORT_SUPERG */
1135         if (__predict_true((vap->iv_caps & IEEE80211_C_8023ENCAP) == 0)) {
1136                 /*
1137                  * Encapsulate the packet in prep for transmission.
1138                  */
1139                 m = ieee80211_encap(vap, ni, m);
1140                 if (m == NULL) {
1141                         /* NB: stat+msg handled in ieee80211_encap */
1142                         ieee80211_free_node(ni);
1143                         return;
1144                 }
1145         }
1146         error = parent->if_transmit(parent, m);
1147         if (error != 0) {
1148                 m_freem(m);
1149                 ieee80211_free_node(ni);
1150         } else {
1151                 ifp->if_opackets++;
1152         }
1153         ic->ic_lastdata = ticks;
1154 }
1155
1156 /*
1157  * Forward the queued frames to known valid mesh gates.
1158  * Assume destination to be outside the MBSS (i.e. proxy entry),
1159  * If no valid mesh gates are known silently discard queued frames.
1160  * After transmitting frames to all known valid mesh gates, this route
1161  * will be marked invalid, and a new path discovery will happen in the hopes
1162  * that (at least) one of the mesh gates have a new proxy entry for us to use.
1163  */
1164 void
1165 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1166     struct ieee80211_mesh_route *rt_dest)
1167 {
1168         struct ieee80211com *ic = vap->iv_ic;
1169         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1170         struct ieee80211_mesh_route *rt_gate;
1171         struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1172         struct mbuf *m, *mcopy, *next;
1173
1174         KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1175             ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1176
1177         /* XXX: send to more than one valid mash gate */
1178         MESH_RT_LOCK(ms);
1179
1180         m = ieee80211_ageq_remove(&ic->ic_stageq,
1181             (struct ieee80211_node *)(uintptr_t)
1182             ieee80211_mac_hash(ic, rt_dest->rt_dest));
1183
1184         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1185                 rt_gate = gr->gr_route;
1186                 if (rt_gate == NULL) {
1187                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1188                                 rt_dest->rt_dest,
1189                                 "mesh gate with no path %6D",
1190                                 gr->gr_addr, ":");
1191                         continue;
1192                 }
1193                 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1194                         continue;
1195                 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1196                     ("route not marked as a mesh gate"));
1197                 KASSERT((rt_gate->rt_flags &
1198                         IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1199                         ("found mesh gate that is also marked porxy"));
1200                 /*
1201                  * convert route to a proxy route gated by the current
1202                  * mesh gate, this is needed so encap can built data
1203                  * frame with correct address.
1204                  */
1205                 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1206                         IEEE80211_MESHRT_FLAGS_VALID;
1207                 rt_dest->rt_ext_seq = 1; /* random value */
1208                 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1209                 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1210                 rt_dest->rt_metric = rt_gate->rt_metric;
1211                 rt_dest->rt_nhops = rt_gate->rt_nhops;
1212                 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1213                 MESH_RT_UNLOCK(ms);
1214                 /* XXX: lock?? */
1215                 mcopy = m_dup(m, M_NOWAIT);
1216                 for (; mcopy != NULL; mcopy = next) {
1217                         next = mcopy->m_nextpkt;
1218                         mcopy->m_nextpkt = NULL;
1219                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1220                             rt_dest->rt_dest,
1221                             "flush queued frame %p len %d", mcopy,
1222                             mcopy->m_pkthdr.len);
1223                         mesh_transmit_to_gate(vap, mcopy, rt_gate);
1224                 }
1225                 MESH_RT_LOCK(ms);
1226         }
1227         rt_dest->rt_flags = 0; /* Mark invalid */
1228         m_freem(m);
1229         MESH_RT_UNLOCK(ms);
1230 }
1231
1232 /*
1233  * Forward the specified frame.
1234  * Decrement the TTL and set TA to our MAC address.
1235  */
1236 static void
1237 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1238     const struct ieee80211_meshcntl *mc)
1239 {
1240         struct ieee80211com *ic = vap->iv_ic;
1241         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1242         struct ifnet *ifp = vap->iv_ifp;
1243         struct ifnet *parent = ic->ic_ifp;
1244         const struct ieee80211_frame *wh =
1245             mtod(m, const struct ieee80211_frame *);
1246         struct mbuf *mcopy;
1247         struct ieee80211_meshcntl *mccopy;
1248         struct ieee80211_frame *whcopy;
1249         struct ieee80211_node *ni;
1250         int err;
1251
1252         /*
1253          * mesh ttl of 1 means we are the last one receving it,
1254          * according to amendment we decrement and then check if
1255          * 0, if so we dont forward.
1256          */
1257         if (mc->mc_ttl < 1) {
1258                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1259                     "%s", "frame not fwd'd, ttl 1");
1260                 vap->iv_stats.is_mesh_fwd_ttl++;
1261                 return;
1262         }
1263         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1264                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1265                     "%s", "frame not fwd'd, fwding disabled");
1266                 vap->iv_stats.is_mesh_fwd_disabled++;
1267                 return;
1268         }
1269         mcopy = m_dup(m, M_NOWAIT);
1270         if (mcopy == NULL) {
1271                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1272                     "%s", "frame not fwd'd, cannot dup");
1273                 vap->iv_stats.is_mesh_fwd_nobuf++;
1274                 ifp->if_oerrors++;
1275                 return;
1276         }
1277         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1278             sizeof(struct ieee80211_meshcntl));
1279         if (mcopy == NULL) {
1280                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1281                     "%s", "frame not fwd'd, too short");
1282                 vap->iv_stats.is_mesh_fwd_tooshort++;
1283                 ifp->if_oerrors++;
1284                 m_freem(mcopy);
1285                 return;
1286         }
1287         whcopy = mtod(mcopy, struct ieee80211_frame *);
1288         mccopy = (struct ieee80211_meshcntl *)
1289             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1290         /* XXX clear other bits? */
1291         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1292         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1293         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1294                 ni = ieee80211_ref_node(vap->iv_bss);
1295                 mcopy->m_flags |= M_MCAST;
1296         } else {
1297                 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1298                 if (ni == NULL) {
1299                         /*
1300                          * [Optional] any of the following three actions:
1301                          * o silently discard
1302                          * o trigger a path discovery
1303                          * o inform TA that meshDA is unknown.
1304                          */
1305                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1306                             "%s", "frame not fwd'd, no path");
1307                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1308                             IEEE80211_REASON_MESH_PERR_NO_FI);
1309                         vap->iv_stats.is_mesh_fwd_nopath++;
1310                         m_freem(mcopy);
1311                         return;
1312                 }
1313                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1314         }
1315         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1316         mccopy->mc_ttl--;
1317
1318         /* XXX calculate priority so drivers can find the tx queue */
1319         M_WME_SETAC(mcopy, WME_AC_BE);
1320
1321         /* XXX do we know m_nextpkt is NULL? */
1322         mcopy->m_pkthdr.rcvif = (void *) ni;
1323         err = parent->if_transmit(parent, mcopy);
1324         if (err != 0) {
1325                 /* NB: IFQ_HANDOFF reclaims mbuf */
1326                 ieee80211_free_node(ni);
1327         } else {
1328                 ifp->if_opackets++;
1329         }
1330 }
1331
1332 static struct mbuf *
1333 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1334 {
1335 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1336 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1337         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1338                   sizeof(struct ieee80211_meshcntl_ae10)];
1339         const struct ieee80211_qosframe_addr4 *wh;
1340         const struct ieee80211_meshcntl_ae10 *mc;
1341         struct ether_header *eh;
1342         struct llc *llc;
1343         int ae;
1344
1345         if (m->m_len < hdrlen + sizeof(*llc) &&
1346             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1347                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1348                     "discard data frame: %s", "m_pullup failed");
1349                 vap->iv_stats.is_rx_tooshort++;
1350                 return NULL;
1351         }
1352         memcpy(b, mtod(m, caddr_t), hdrlen);
1353         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1354         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1355         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1356                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1357             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1358
1359         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1360         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1361             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1362             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1363             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1364             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1365               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1366                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1367                 llc = NULL;
1368         } else {
1369                 m_adj(m, hdrlen - sizeof(*eh));
1370         }
1371         eh = mtod(m, struct ether_header *);
1372         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1373         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1374                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1375                 if (ae == IEEE80211_MESH_AE_00) {
1376                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1377                 } else if (ae == IEEE80211_MESH_AE_01) {
1378                         IEEE80211_ADDR_COPY(eh->ether_shost,
1379                             MC01(mc)->mc_addr4);
1380                 } else {
1381                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1382                             (const struct ieee80211_frame *)wh, NULL,
1383                             "bad AE %d", ae);
1384                         vap->iv_stats.is_mesh_badae++;
1385                         m_freem(m);
1386                         return NULL;
1387                 }
1388         } else {
1389                 if (ae == IEEE80211_MESH_AE_00) {
1390                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1391                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1392                 } else if (ae == IEEE80211_MESH_AE_10) {
1393                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1394                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1395                 } else {
1396                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1397                             (const struct ieee80211_frame *)wh, NULL,
1398                             "bad AE %d", ae);
1399                         vap->iv_stats.is_mesh_badae++;
1400                         m_freem(m);
1401                         return NULL;
1402                 }
1403         }
1404 #ifdef ALIGNED_POINTER
1405         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1406                 m = ieee80211_realign(vap, m, sizeof(*eh));
1407                 if (m == NULL)
1408                         return NULL;
1409         }
1410 #endif /* ALIGNED_POINTER */
1411         if (llc != NULL) {
1412                 eh = mtod(m, struct ether_header *);
1413                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1414         }
1415         return m;
1416 #undef  WDIR
1417 #undef  MC01
1418 }
1419
1420 /*
1421  * Return non-zero if the unicast mesh data frame should be processed
1422  * locally.  Frames that are not proxy'd have our address, otherwise
1423  * we need to consult the routing table to look for a proxy entry.
1424  */
1425 static __inline int
1426 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1427     const struct ieee80211_meshcntl *mc)
1428 {
1429         int ae = mc->mc_flags & 3;
1430
1431         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1432             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1433         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1434             ("bad AE %d", ae));
1435         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
1436                 const struct ieee80211_meshcntl_ae10 *mc10 =
1437                     (const struct ieee80211_meshcntl_ae10 *) mc;
1438                 struct ieee80211_mesh_route *rt =
1439                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1440                 /* check for proxy route to ourself */
1441                 return (rt != NULL &&
1442                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1443         } else                                  /* ucast w/o proxy */
1444                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1445 }
1446
1447 /*
1448  * Verifies transmitter, updates lifetime, precursor list and forwards data.
1449  * > 0 means we have forwarded data and no need to process locally
1450  * == 0 means we want to process locally (and we may have forwarded data
1451  * < 0 means there was an error and data should be discarded
1452  */
1453 static int
1454 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1455     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1456 {
1457         struct ieee80211_qosframe_addr4 *qwh;
1458         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1459         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1460
1461         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1462
1463         /*
1464          * TODO:
1465          * o verify addr2 is  a legitimate transmitter
1466          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1467          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1468          */
1469
1470         /* set lifetime of addr3 (meshDA) to initial value */
1471         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1472         if (rt_meshda == NULL) {
1473                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1474                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
1475                 /*
1476                  * [Optional] any of the following three actions:
1477                  * o silently discard                           [X]
1478                  * o trigger a path discovery                   [ ]
1479                  * o inform TA that meshDA is unknown.          [ ]
1480                  */
1481                 /* XXX: stats */
1482                 return (-1);
1483         }
1484
1485         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1486             ms->ms_ppath->mpp_inact));
1487
1488         /* set lifetime of addr4 (meshSA) to initial value */
1489         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1490         KASSERT(rt_meshsa != NULL, ("no route"));
1491         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1492             ms->ms_ppath->mpp_inact));
1493
1494         mesh_forward(vap, m, mc);
1495         return (1); /* dont process locally */
1496 }
1497
1498 /*
1499  * Verifies transmitter, updates lifetime, precursor list and process data
1500  * locally, if data is proxy with AE = 10 it could mean data should go
1501  * on another mesh path or data should be forwarded to the DS.
1502  *
1503  * > 0 means we have forwarded data and no need to process locally
1504  * == 0 means we want to process locally (and we may have forwarded data
1505  * < 0 means there was an error and data should be discarded
1506  */
1507 static int
1508 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1509     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1510 {
1511         struct ieee80211_qosframe_addr4 *qwh;
1512         const struct ieee80211_meshcntl_ae10 *mc10;
1513         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1514         struct ieee80211_mesh_route *rt;
1515         int ae;
1516
1517         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1518         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1519
1520         /*
1521          * TODO:
1522          * o verify addr2 is  a legitimate transmitter
1523          * o lifetime of precursor entry is max(init, curr)
1524          */
1525
1526         /* set lifetime of addr4 (meshSA) to initial value */
1527         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1528         KASSERT(rt != NULL, ("no route"));
1529         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1530         rt = NULL;
1531
1532         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1533         KASSERT(ae == IEEE80211_MESH_AE_00 ||
1534             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1535         if (ae == IEEE80211_MESH_AE_10) {
1536                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1537                         return (0); /* process locally */
1538                 }
1539
1540                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1541                 if (rt != NULL &&
1542                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1543                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1544                         /*
1545                          * Forward on another mesh-path, according to
1546                          * amendment as specified in 9.32.4.1
1547                          */
1548                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1549                         mesh_forward(vap, m,
1550                             (const struct ieee80211_meshcntl *)mc10);
1551                         return (1); /* dont process locally */
1552                 }
1553                 /*
1554                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
1555                  * addressed according to 13.11.3.2.
1556                  */
1557                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1558                     "forward frame to DS, SA(%6D) DA(%6D)",
1559                     mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1560         }
1561         return (0); /* process locally */
1562 }
1563
1564 /*
1565  * Try to forward the group addressed data on to other mesh STAs, and
1566  * also to the DS.
1567  *
1568  * > 0 means we have forwarded data and no need to process locally
1569  * == 0 means we want to process locally (and we may have forwarded data
1570  * < 0 means there was an error and data should be discarded
1571  */
1572 static int
1573 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1574     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1575 {
1576 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1577         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1578
1579         mesh_forward(vap, m, mc);
1580
1581         if(mc->mc_ttl > 0) {
1582                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1583                         /*
1584                          * Forward of MSDUs from the MBSS to DS group addressed
1585                          * (according to 13.11.3.2)
1586                          * This happens by delivering the packet, and a bridge
1587                          * will sent it on another port member.
1588                          */
1589                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1590                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
1591                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1592                                     MC01(mc)->mc_addr4, "%s",
1593                                     "forward from MBSS to the DS");
1594                 }
1595         }
1596         return (0); /* process locally */
1597 #undef  MC01
1598 }
1599
1600 static int
1601 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
1602 {
1603 #define HAS_SEQ(type)   ((type & 0x4) == 0)
1604 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1605 #define MC10(mc)        ((const struct ieee80211_meshcntl_ae10 *)mc)
1606         struct ieee80211vap *vap = ni->ni_vap;
1607         struct ieee80211com *ic = ni->ni_ic;
1608         struct ifnet *ifp = vap->iv_ifp;
1609         struct ieee80211_frame *wh;
1610         const struct ieee80211_meshcntl *mc;
1611         int hdrspace, meshdrlen, need_tap, error;
1612         uint8_t dir, type, subtype, ae;
1613         uint32_t seq;
1614         const uint8_t *addr;
1615         uint8_t qos[2];
1616         ieee80211_seq rxseq;
1617
1618         KASSERT(ni != NULL, ("null node"));
1619         ni->ni_inact = ni->ni_inact_reload;
1620
1621         need_tap = 1;                   /* mbuf need to be tapped. */
1622         type = -1;                      /* undefined */
1623
1624         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1625                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1626                     ni->ni_macaddr, NULL,
1627                     "too short (1): len %u", m->m_pkthdr.len);
1628                 vap->iv_stats.is_rx_tooshort++;
1629                 goto out;
1630         }
1631         /*
1632          * Bit of a cheat here, we use a pointer for a 3-address
1633          * frame format but don't reference fields past outside
1634          * ieee80211_frame_min w/o first validating the data is
1635          * present.
1636         */
1637         wh = mtod(m, struct ieee80211_frame *);
1638
1639         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1640             IEEE80211_FC0_VERSION_0) {
1641                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1642                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1643                 vap->iv_stats.is_rx_badversion++;
1644                 goto err;
1645         }
1646         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1647         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1648         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1649         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1650                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1651                 ni->ni_noise = nf;
1652                 if (HAS_SEQ(type)) {
1653                         uint8_t tid = ieee80211_gettid(wh);
1654
1655                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
1656                             TID_TO_WME_AC(tid) >= WME_AC_VI)
1657                                 ic->ic_wme.wme_hipri_traffic++;
1658                         rxseq = le16toh(*(uint16_t *)wh->i_seq);
1659                         if (! ieee80211_check_rxseq(ni, wh)) {
1660                                 /* duplicate, discard */
1661                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1662                                     wh->i_addr1, "duplicate",
1663                                     "seqno <%u,%u> fragno <%u,%u> tid %u",
1664                                     rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
1665                                     ni->ni_rxseqs[tid] >>
1666                                     IEEE80211_SEQ_SEQ_SHIFT,
1667                                     rxseq & IEEE80211_SEQ_FRAG_MASK,
1668                                     ni->ni_rxseqs[tid] &
1669                                     IEEE80211_SEQ_FRAG_MASK,
1670                                     tid);
1671                                 vap->iv_stats.is_rx_dup++;
1672                                 IEEE80211_NODE_STAT(ni, rx_dup);
1673                                 goto out;
1674                         }
1675                         ni->ni_rxseqs[tid] = rxseq;
1676                 }
1677         }
1678 #ifdef IEEE80211_DEBUG
1679         /*
1680          * It's easier, but too expensive, to simulate different mesh
1681          * topologies by consulting the ACL policy very early, so do this
1682          * only under DEBUG.
1683          *
1684          * NB: this check is also done upon peering link initiation.
1685          */
1686         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1687                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1688                     wh, NULL, "%s", "disallowed by ACL");
1689                 vap->iv_stats.is_rx_acl++;
1690                 goto out;
1691         }
1692 #endif
1693         switch (type) {
1694         case IEEE80211_FC0_TYPE_DATA:
1695                 if (ni == vap->iv_bss)
1696                         goto out;
1697                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1698                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1699                             ni->ni_macaddr, NULL,
1700                             "peer link not yet established (%d)",
1701                             ni->ni_mlstate);
1702                         vap->iv_stats.is_mesh_nolink++;
1703                         goto out;
1704                 }
1705                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1706                     dir != IEEE80211_FC1_DIR_DSTODS) {
1707                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1708                             wh, "data", "incorrect dir 0x%x", dir);
1709                         vap->iv_stats.is_rx_wrongdir++;
1710                         goto err;
1711                 }
1712
1713                 /* All Mesh data frames are QoS subtype */
1714                 if (!HAS_SEQ(type)) {
1715                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1716                             wh, "data", "incorrect subtype 0x%x", subtype);
1717                         vap->iv_stats.is_rx_badsubtype++;
1718                         goto err;
1719                 }
1720
1721                 /*
1722                  * Next up, any fragmentation.
1723                  * XXX: we defrag before we even try to forward,
1724                  * Mesh Control field is not present in sub-sequent
1725                  * fragmented frames. This is in contrast to Draft 4.0.
1726                  */
1727                 hdrspace = ieee80211_hdrspace(ic, wh);
1728                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1729                         m = ieee80211_defrag(ni, m, hdrspace);
1730                         if (m == NULL) {
1731                                 /* Fragment dropped or frame not complete yet */
1732                                 goto out;
1733                         }
1734                 }
1735                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1736
1737                 /*
1738                  * Now we have a complete Mesh Data frame.
1739                  */
1740
1741                 /*
1742                  * Only fromDStoDS data frames use 4 address qos frames
1743                  * as specified in amendment. Otherwise addr4 is located
1744                  * in the Mesh Control field and a 3 address qos frame
1745                  * is used.
1746                  */
1747                 if (IEEE80211_IS_DSTODS(wh))
1748                         *(uint16_t *)qos = *(uint16_t *)
1749                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos;
1750                 else
1751                         *(uint16_t *)qos = *(uint16_t *)
1752                             ((struct ieee80211_qosframe *)wh)->i_qos;
1753
1754                 /*
1755                  * NB: The mesh STA sets the Mesh Control Present
1756                  * subfield to 1 in the Mesh Data frame containing
1757                  * an unfragmented MSDU, an A-MSDU, or the first
1758                  * fragment of an MSDU.
1759                  * After defrag it should always be present.
1760                  */
1761                 if (!(qos[1] & IEEE80211_QOS_MC)) {
1762                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1763                             ni->ni_macaddr, NULL,
1764                             "%s", "Mesh control field not present");
1765                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1766                         goto err;
1767                 }
1768
1769                 /* pull up enough to get to the mesh control */
1770                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1771                     (m = m_pullup(m, hdrspace +
1772                         sizeof(struct ieee80211_meshcntl))) == NULL) {
1773                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1774                             ni->ni_macaddr, NULL,
1775                             "data too short: expecting %u", hdrspace);
1776                         vap->iv_stats.is_rx_tooshort++;
1777                         goto out;               /* XXX */
1778                 }
1779                 /*
1780                  * Now calculate the full extent of the headers. Note
1781                  * mesh_decap will pull up anything we didn't get
1782                  * above when it strips the 802.11 headers.
1783                  */
1784                 mc = (const struct ieee80211_meshcntl *)
1785                     (mtod(m, const uint8_t *) + hdrspace);
1786                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1787                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1788                     ae * IEEE80211_ADDR_LEN;
1789                 hdrspace += meshdrlen;
1790
1791                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1792                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1793                     (m->m_len < hdrspace) &&
1794                     ((m = m_pullup(m, hdrspace)) == NULL)) {
1795                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1796                             ni->ni_macaddr, NULL,
1797                             "data too short: expecting %u", hdrspace);
1798                         vap->iv_stats.is_rx_tooshort++;
1799                         goto out;               /* XXX */
1800                 }
1801                 /* XXX: are we sure there is no reallocating after m_pullup? */
1802
1803                 seq = LE_READ_4(mc->mc_seq);
1804                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1805                         addr = wh->i_addr3;
1806                 else if (ae == IEEE80211_MESH_AE_01)
1807                         addr = MC01(mc)->mc_addr4;
1808                 else
1809                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1810                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1811                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1812                             addr, "data", "%s", "not to me");
1813                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1814                         goto out;
1815                 }
1816                 if (mesh_checkpseq(vap, addr, seq) != 0) {
1817                         vap->iv_stats.is_rx_dup++;
1818                         goto out;
1819                 }
1820
1821                 /* This code "routes" the frame to the right control path */
1822                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1823                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1824                                 error =
1825                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1826                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1827                                 error = mesh_recv_group_data(vap, m, wh, mc);
1828                         else
1829                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1830                                     wh, mc);
1831                 } else
1832                         error = mesh_recv_group_data(vap, m, wh, mc);
1833                 if (error < 0)
1834                         goto err;
1835                 else if (error > 0)
1836                         goto out;
1837
1838                 if (ieee80211_radiotap_active_vap(vap))
1839                         ieee80211_radiotap_rx(vap, m);
1840                 need_tap = 0;
1841
1842                 /*
1843                  * Finally, strip the 802.11 header.
1844                  */
1845                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1846                 if (m == NULL) {
1847                         /* XXX mask bit to check for both */
1848                         /* don't count Null data frames as errors */
1849                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1850                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1851                                 goto out;
1852                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1853                             ni->ni_macaddr, "data", "%s", "decap error");
1854                         vap->iv_stats.is_rx_decap++;
1855                         IEEE80211_NODE_STAT(ni, rx_decap);
1856                         goto err;
1857                 }
1858                 if (qos[0] & IEEE80211_QOS_AMSDU) {
1859                         m = ieee80211_decap_amsdu(ni, m);
1860                         if (m == NULL)
1861                                 return IEEE80211_FC0_TYPE_DATA;
1862                 }
1863                 ieee80211_deliver_data(vap, ni, m);
1864                 return type;
1865         case IEEE80211_FC0_TYPE_MGT:
1866                 vap->iv_stats.is_rx_mgmt++;
1867                 IEEE80211_NODE_STAT(ni, rx_mgmt);
1868                 if (dir != IEEE80211_FC1_DIR_NODS) {
1869                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1870                             wh, "mgt", "incorrect dir 0x%x", dir);
1871                         vap->iv_stats.is_rx_wrongdir++;
1872                         goto err;
1873                 }
1874                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1875                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1876                             ni->ni_macaddr, "mgt", "too short: len %u",
1877                             m->m_pkthdr.len);
1878                         vap->iv_stats.is_rx_tooshort++;
1879                         goto out;
1880                 }
1881 #ifdef IEEE80211_DEBUG
1882                 if ((ieee80211_msg_debug(vap) &&
1883                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1884                     ieee80211_msg_dumppkts(vap)) {
1885                         if_printf(ifp, "received %s from %s rssi %d\n",
1886                             ieee80211_mgt_subtype_name[subtype >>
1887                             IEEE80211_FC0_SUBTYPE_SHIFT],
1888                             ether_sprintf(wh->i_addr2), rssi);
1889                 }
1890 #endif
1891                 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1892                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1893                             wh, NULL, "%s", "WEP set but not permitted");
1894                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1895                         goto out;
1896                 }
1897                 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
1898                 goto out;
1899         case IEEE80211_FC0_TYPE_CTL:
1900                 vap->iv_stats.is_rx_ctl++;
1901                 IEEE80211_NODE_STAT(ni, rx_ctrl);
1902                 goto out;
1903         default:
1904                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1905                     wh, "bad", "frame type 0x%x", type);
1906                 /* should not come here */
1907                 break;
1908         }
1909 err:
1910         ifp->if_ierrors++;
1911 out:
1912         if (m != NULL) {
1913                 if (need_tap && ieee80211_radiotap_active_vap(vap))
1914                         ieee80211_radiotap_rx(vap, m);
1915                 m_freem(m);
1916         }
1917         return type;
1918 #undef  HAS_SEQ
1919 #undef  MC01
1920 #undef  MC10
1921 }
1922
1923 static void
1924 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1925     int rssi, int nf)
1926 {
1927         struct ieee80211vap *vap = ni->ni_vap;
1928         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1929         struct ieee80211com *ic = ni->ni_ic;
1930         struct ieee80211_frame *wh;
1931         struct ieee80211_mesh_route *rt;
1932         uint8_t *frm, *efrm;
1933
1934         wh = mtod(m0, struct ieee80211_frame *);
1935         frm = (uint8_t *)&wh[1];
1936         efrm = mtod(m0, uint8_t *) + m0->m_len;
1937         switch (subtype) {
1938         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1939         case IEEE80211_FC0_SUBTYPE_BEACON:
1940         {
1941                 struct ieee80211_scanparams scan;
1942                 /*
1943                  * We process beacon/probe response
1944                  * frames to discover neighbors.
1945                  */
1946                 if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
1947                         return;
1948                 /*
1949                  * Count frame now that we know it's to be processed.
1950                  */
1951                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1952                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
1953                         IEEE80211_NODE_STAT(ni, rx_beacons);
1954                 } else
1955                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1956                 /*
1957                  * If scanning, just pass information to the scan module.
1958                  */
1959                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1960                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1961                                 /*
1962                                  * Actively scanning a channel marked passive;
1963                                  * send a probe request now that we know there
1964                                  * is 802.11 traffic present.
1965                                  *
1966                                  * XXX check if the beacon we recv'd gives
1967                                  * us what we need and suppress the probe req
1968                                  */
1969                                 ieee80211_probe_curchan(vap, 1);
1970                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1971                         }
1972                         ieee80211_add_scan(vap, &scan, wh,
1973                             subtype, rssi, nf);
1974                         return;
1975                 }
1976
1977                 /* The rest of this code assumes we are running */
1978                 if (vap->iv_state != IEEE80211_S_RUN)
1979                         return;
1980                 /*
1981                  * Ignore non-mesh STAs.
1982                  */
1983                 if ((scan.capinfo &
1984                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1985                     scan.meshid == NULL || scan.meshconf == NULL) {
1986                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1987                             wh, "beacon", "%s", "not a mesh sta");
1988                         vap->iv_stats.is_mesh_wrongmesh++;
1989                         return;
1990                 }
1991                 /*
1992                  * Ignore STAs for other mesh networks.
1993                  */
1994                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1995                     mesh_verify_meshconf(vap, scan.meshconf)) {
1996                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1997                             wh, "beacon", "%s", "not for our mesh");
1998                         vap->iv_stats.is_mesh_wrongmesh++;
1999                         return;
2000                 }
2001                 /*
2002                  * Peer only based on the current ACL policy.
2003                  */
2004                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
2005                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
2006                             wh, NULL, "%s", "disallowed by ACL");
2007                         vap->iv_stats.is_rx_acl++;
2008                         return;
2009                 }
2010                 /*
2011                  * Do neighbor discovery.
2012                  */
2013                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
2014                         /*
2015                          * Create a new entry in the neighbor table.
2016                          */
2017                         ni = ieee80211_add_neighbor(vap, wh, &scan);
2018                 }
2019                 /*
2020                  * Automatically peer with discovered nodes if possible.
2021                  */
2022                 if (ni != vap->iv_bss &&
2023                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
2024                         switch (ni->ni_mlstate) {
2025                         case IEEE80211_NODE_MESH_IDLE:
2026                         {
2027                                 uint16_t args[1];
2028
2029                                 /* Wait for backoff callout to reset counter */
2030                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
2031                                         return;
2032
2033                                 ni->ni_mlpid = mesh_generateid(vap);
2034                                 if (ni->ni_mlpid == 0)
2035                                         return;
2036                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
2037                                 args[0] = ni->ni_mlpid;
2038                                 ieee80211_send_action(ni,
2039                                 IEEE80211_ACTION_CAT_SELF_PROT,
2040                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
2041                                 ni->ni_mlrcnt = 0;
2042                                 mesh_peer_timeout_setup(ni);
2043                                 break;
2044                         }
2045                         case IEEE80211_NODE_MESH_ESTABLISHED:
2046                         {
2047                                 /*
2048                                  * Valid beacon from a peer mesh STA
2049                                  * bump TA lifetime
2050                                  */
2051                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
2052                                 if(rt != NULL) {
2053                                         ieee80211_mesh_rt_update(rt,
2054                                             ticks_to_msecs(
2055                                             ms->ms_ppath->mpp_inact));
2056                                 }
2057                                 break;
2058                         }
2059                         default:
2060                                 break; /* ignore */
2061                         }
2062                 }
2063                 break;
2064         }
2065         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
2066         {
2067                 uint8_t *ssid, *meshid, *rates, *xrates;
2068                 uint8_t *sfrm;
2069
2070                 if (vap->iv_state != IEEE80211_S_RUN) {
2071                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2072                             wh, NULL, "wrong state %s",
2073                             ieee80211_state_name[vap->iv_state]);
2074                         vap->iv_stats.is_rx_mgtdiscard++;
2075                         return;
2076                 }
2077                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
2078                         /* frame must be directed */
2079                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2080                             wh, NULL, "%s", "not unicast");
2081                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
2082                         return;
2083                 }
2084                 /*
2085                  * prreq frame format
2086                  *      [tlv] ssid
2087                  *      [tlv] supported rates
2088                  *      [tlv] extended supported rates
2089                  *      [tlv] mesh id
2090                  */
2091                 ssid = meshid = rates = xrates = NULL;
2092                 sfrm = frm;
2093                 while (efrm - frm > 1) {
2094                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2095                         switch (*frm) {
2096                         case IEEE80211_ELEMID_SSID:
2097                                 ssid = frm;
2098                                 break;
2099                         case IEEE80211_ELEMID_RATES:
2100                                 rates = frm;
2101                                 break;
2102                         case IEEE80211_ELEMID_XRATES:
2103                                 xrates = frm;
2104                                 break;
2105                         case IEEE80211_ELEMID_MESHID:
2106                                 meshid = frm;
2107                                 break;
2108                         }
2109                         frm += frm[1] + 2;
2110                 }
2111                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2112                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2113                 if (xrates != NULL)
2114                         IEEE80211_VERIFY_ELEMENT(xrates,
2115                             IEEE80211_RATE_MAXSIZE - rates[1], return);
2116                 if (meshid != NULL) {
2117                         IEEE80211_VERIFY_ELEMENT(meshid,
2118                             IEEE80211_MESHID_LEN, return);
2119                         /* NB: meshid, not ssid */
2120                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2121                 }
2122
2123                 /* XXX find a better class or define it's own */
2124                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2125                     "%s", "recv probe req");
2126                 /*
2127                  * Some legacy 11b clients cannot hack a complete
2128                  * probe response frame.  When the request includes
2129                  * only a bare-bones rate set, communicate this to
2130                  * the transmit side.
2131                  */
2132                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2133                 break;
2134         }
2135
2136         case IEEE80211_FC0_SUBTYPE_ACTION:
2137         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2138                 if (ni == vap->iv_bss) {
2139                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2140                             wh, NULL, "%s", "unknown node");
2141                         vap->iv_stats.is_rx_mgtdiscard++;
2142                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2143                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2144                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2145                             wh, NULL, "%s", "not for us");
2146                         vap->iv_stats.is_rx_mgtdiscard++;
2147                 } else if (vap->iv_state != IEEE80211_S_RUN) {
2148                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2149                             wh, NULL, "wrong state %s",
2150                             ieee80211_state_name[vap->iv_state]);
2151                         vap->iv_stats.is_rx_mgtdiscard++;
2152                 } else {
2153                         if (ieee80211_parse_action(ni, m0) == 0)
2154                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2155                 }
2156                 break;
2157
2158         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2159         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2160         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2161         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2162         case IEEE80211_FC0_SUBTYPE_ATIM:
2163         case IEEE80211_FC0_SUBTYPE_DISASSOC:
2164         case IEEE80211_FC0_SUBTYPE_AUTH:
2165         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2166                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2167                     wh, NULL, "%s", "not handled");
2168                 vap->iv_stats.is_rx_mgtdiscard++;
2169                 break;
2170
2171         default:
2172                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2173                     wh, "mgt", "subtype 0x%x not handled", subtype);
2174                 vap->iv_stats.is_rx_badsubtype++;
2175                 break;
2176         }
2177 }
2178
2179 static void
2180 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2181 {
2182
2183         switch (subtype) {
2184         case IEEE80211_FC0_SUBTYPE_BAR:
2185                 ieee80211_recv_bar(ni, m);
2186                 break;
2187         }
2188 }
2189
2190 /*
2191  * Parse meshpeering action ie's for MPM frames
2192  */
2193 static const struct ieee80211_meshpeer_ie *
2194 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2195         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
2196         const uint8_t *frm, const uint8_t *efrm,
2197         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2198 {
2199         struct ieee80211vap *vap = ni->ni_vap;
2200         const struct ieee80211_meshpeer_ie *mpie;
2201         uint16_t args[3];
2202         const uint8_t *meshid, *meshconf, *meshpeer;
2203         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2204
2205         meshid = meshconf = meshpeer = NULL;
2206         while (efrm - frm > 1) {
2207                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2208                 switch (*frm) {
2209                 case IEEE80211_ELEMID_MESHID:
2210                         meshid = frm;
2211                         break;
2212                 case IEEE80211_ELEMID_MESHCONF:
2213                         meshconf = frm;
2214                         break;
2215                 case IEEE80211_ELEMID_MESHPEER:
2216                         meshpeer = frm;
2217                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
2218                         memset(mp, 0, sizeof(*mp));
2219                         mp->peer_len = mpie->peer_len;
2220                         mp->peer_proto = LE_READ_2(&mpie->peer_proto);
2221                         mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid);
2222                         switch (subtype) {
2223                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2224                                 mp->peer_linkid =
2225                                     LE_READ_2(&mpie->peer_linkid);
2226                                 break;
2227                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
2228                                 /* NB: peer link ID is optional */
2229                                 if (mpie->peer_len ==
2230                                     (IEEE80211_MPM_BASE_SZ + 2)) {
2231                                         mp->peer_linkid = 0;
2232                                         mp->peer_rcode =
2233                                             LE_READ_2(&mpie->peer_linkid);
2234                                 } else {
2235                                         mp->peer_linkid =
2236                                             LE_READ_2(&mpie->peer_linkid);
2237                                         mp->peer_rcode =
2238                                             LE_READ_2(&mpie->peer_rcode);
2239                                 }
2240                                 break;
2241                         }
2242                         break;
2243                 }
2244                 frm += frm[1] + 2;
2245         }
2246
2247         /*
2248          * Verify the contents of the frame.
2249          * If it fails validation, close the peer link.
2250          */
2251         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2252                 sendclose = 1;
2253                 IEEE80211_DISCARD(vap,
2254                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2255                     wh, NULL, "%s", "MPM validation failed");
2256         }
2257
2258         /* If meshid is not the same reject any frames type. */
2259         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2260                 sendclose = 1;
2261                 IEEE80211_DISCARD(vap,
2262                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2263                     wh, NULL, "%s", "not for our mesh");
2264                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2265                         /*
2266                          * Standard not clear about this, if we dont ignore
2267                          * there will be an endless loop between nodes sending
2268                          * CLOSE frames between each other with wrong meshid.
2269                          * Discard and timers will bring FSM to IDLE state.
2270                          */
2271                         return NULL;
2272                 }
2273         }
2274
2275         /*
2276          * Close frames are accepted if meshid is the same.
2277          * Verify the other two types.
2278          */
2279         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2280             mesh_verify_meshconf(vap, meshconf)) {
2281                 sendclose = 1;
2282                 IEEE80211_DISCARD(vap,
2283                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2284                     wh, NULL, "%s", "configuration missmatch");
2285         }
2286
2287         if (sendclose) {
2288                 vap->iv_stats.is_rx_mgtdiscard++;
2289                 switch (ni->ni_mlstate) {
2290                 case IEEE80211_NODE_MESH_IDLE:
2291                 case IEEE80211_NODE_MESH_ESTABLISHED:
2292                 case IEEE80211_NODE_MESH_HOLDING:
2293                         /* ignore */
2294                         break;
2295                 case IEEE80211_NODE_MESH_OPENSNT:
2296                 case IEEE80211_NODE_MESH_OPENRCV:
2297                 case IEEE80211_NODE_MESH_CONFIRMRCV:
2298                         args[0] = ni->ni_mlpid;
2299                         args[1] = ni->ni_mllid;
2300                         /* Reason codes for rejection */
2301                         switch (subtype) {
2302                         case IEEE80211_ACTION_MESHPEERING_OPEN:
2303                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2304                                 break;
2305                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2306                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2307                                 break;
2308                         }
2309                         ieee80211_send_action(ni,
2310                             IEEE80211_ACTION_CAT_SELF_PROT,
2311                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2312                             args);
2313                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2314                         mesh_peer_timeout_setup(ni);
2315                         break;
2316                 }
2317                 return NULL;
2318         }
2319
2320         return (const struct ieee80211_meshpeer_ie *) mp;
2321 }
2322
2323 static int
2324 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2325         const struct ieee80211_frame *wh,
2326         const uint8_t *frm, const uint8_t *efrm)
2327 {
2328         struct ieee80211vap *vap = ni->ni_vap;
2329         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2330         struct ieee80211_meshpeer_ie ie;
2331         const struct ieee80211_meshpeer_ie *meshpeer;
2332         uint16_t args[3];
2333
2334         /* +2+2 for action + code + capabilites */
2335         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2336             IEEE80211_ACTION_MESHPEERING_OPEN);
2337         if (meshpeer == NULL) {
2338                 return 0;
2339         }
2340
2341         /* XXX move up */
2342         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2343             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2344
2345         switch (ni->ni_mlstate) {
2346         case IEEE80211_NODE_MESH_IDLE:
2347                 /* Reject open request if reached our maximum neighbor count */
2348                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2349                         args[0] = meshpeer->peer_llinkid;
2350                         args[1] = 0;
2351                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2352                         ieee80211_send_action(ni,
2353                             IEEE80211_ACTION_CAT_SELF_PROT,
2354                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2355                             args);
2356                         /* stay in IDLE state */
2357                         return (0);
2358                 }
2359                 /* Open frame accepted */
2360                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2361                 ni->ni_mllid = meshpeer->peer_llinkid;
2362                 ni->ni_mlpid = mesh_generateid(vap);
2363                 if (ni->ni_mlpid == 0)
2364                         return 0;               /* XXX */
2365                 args[0] = ni->ni_mlpid;
2366                 /* Announce we're open too... */
2367                 ieee80211_send_action(ni,
2368                     IEEE80211_ACTION_CAT_SELF_PROT,
2369                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
2370                 /* ...and confirm the link. */
2371                 args[0] = ni->ni_mlpid;
2372                 args[1] = ni->ni_mllid;
2373                 ieee80211_send_action(ni,
2374                     IEEE80211_ACTION_CAT_SELF_PROT,
2375                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2376                     args);
2377                 mesh_peer_timeout_setup(ni);
2378                 break;
2379         case IEEE80211_NODE_MESH_OPENRCV:
2380                 /* Wrong Link ID */
2381                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2382                         args[0] = ni->ni_mllid;
2383                         args[1] = ni->ni_mlpid;
2384                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2385                         ieee80211_send_action(ni,
2386                             IEEE80211_ACTION_CAT_SELF_PROT,
2387                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2388                             args);
2389                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2390                         mesh_peer_timeout_setup(ni);
2391                         break;
2392                 }
2393                 /* Duplicate open, confirm again. */
2394                 args[0] = ni->ni_mlpid;
2395                 args[1] = ni->ni_mllid;
2396                 ieee80211_send_action(ni,
2397                     IEEE80211_ACTION_CAT_SELF_PROT,
2398                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2399                     args);
2400                 break;
2401         case IEEE80211_NODE_MESH_OPENSNT:
2402                 ni->ni_mllid = meshpeer->peer_llinkid;
2403                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2404                 args[0] = ni->ni_mlpid;
2405                 args[1] = ni->ni_mllid;
2406                 ieee80211_send_action(ni,
2407                     IEEE80211_ACTION_CAT_SELF_PROT,
2408                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2409                     args);
2410                 /* NB: don't setup/clear any timeout */
2411                 break;
2412         case IEEE80211_NODE_MESH_CONFIRMRCV:
2413                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2414                     ni->ni_mllid != meshpeer->peer_llinkid) {
2415                         args[0] = ni->ni_mlpid;
2416                         args[1] = ni->ni_mllid;
2417                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2418                         ieee80211_send_action(ni,
2419                             IEEE80211_ACTION_CAT_SELF_PROT,
2420                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2421                             args);
2422                         mesh_linkchange(ni,
2423                             IEEE80211_NODE_MESH_HOLDING);
2424                         mesh_peer_timeout_setup(ni);
2425                         break;
2426                 }
2427                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2428                 ni->ni_mllid = meshpeer->peer_llinkid;
2429                 args[0] = ni->ni_mlpid;
2430                 args[1] = ni->ni_mllid;
2431                 ieee80211_send_action(ni,
2432                     IEEE80211_ACTION_CAT_SELF_PROT,
2433                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2434                     args);
2435                 mesh_peer_timeout_stop(ni);
2436                 break;
2437         case IEEE80211_NODE_MESH_ESTABLISHED:
2438                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2439                         args[0] = ni->ni_mllid;
2440                         args[1] = ni->ni_mlpid;
2441                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2442                         ieee80211_send_action(ni,
2443                             IEEE80211_ACTION_CAT_SELF_PROT,
2444                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2445                             args);
2446                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2447                         mesh_peer_timeout_setup(ni);
2448                         break;
2449                 }
2450                 args[0] = ni->ni_mlpid;
2451                 args[1] = ni->ni_mllid;
2452                 ieee80211_send_action(ni,
2453                     IEEE80211_ACTION_CAT_SELF_PROT,
2454                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2455                     args);
2456                 break;
2457         case IEEE80211_NODE_MESH_HOLDING:
2458                 args[0] = ni->ni_mlpid;
2459                 args[1] = meshpeer->peer_llinkid;
2460                 /* Standard not clear about what the reaason code should be */
2461                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2462                 ieee80211_send_action(ni,
2463                     IEEE80211_ACTION_CAT_SELF_PROT,
2464                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2465                     args);
2466                 break;
2467         }
2468         return 0;
2469 }
2470
2471 static int
2472 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2473         const struct ieee80211_frame *wh,
2474         const uint8_t *frm, const uint8_t *efrm)
2475 {
2476         struct ieee80211vap *vap = ni->ni_vap;
2477         struct ieee80211_meshpeer_ie ie;
2478         const struct ieee80211_meshpeer_ie *meshpeer;
2479         uint16_t args[3];
2480
2481         /* +2+2+2+2 for action + code + capabilites + status code + AID */
2482         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2483             IEEE80211_ACTION_MESHPEERING_CONFIRM);
2484         if (meshpeer == NULL) {
2485                 return 0;
2486         }
2487
2488         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2489             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2490             meshpeer->peer_llinkid, meshpeer->peer_linkid);
2491
2492         switch (ni->ni_mlstate) {
2493         case IEEE80211_NODE_MESH_OPENRCV:
2494                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2495                 mesh_peer_timeout_stop(ni);
2496                 break;
2497         case IEEE80211_NODE_MESH_OPENSNT:
2498                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2499                 mesh_peer_timeout_setup(ni);
2500                 break;
2501         case IEEE80211_NODE_MESH_HOLDING:
2502                 args[0] = ni->ni_mlpid;
2503                 args[1] = meshpeer->peer_llinkid;
2504                 /* Standard not clear about what the reaason code should be */
2505                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2506                 ieee80211_send_action(ni,
2507                     IEEE80211_ACTION_CAT_SELF_PROT,
2508                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2509                     args);
2510                 break;
2511         case IEEE80211_NODE_MESH_CONFIRMRCV:
2512                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2513                         args[0] = ni->ni_mlpid;
2514                         args[1] = ni->ni_mllid;
2515                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2516                         ieee80211_send_action(ni,
2517                             IEEE80211_ACTION_CAT_SELF_PROT,
2518                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2519                             args);
2520                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2521                         mesh_peer_timeout_setup(ni);
2522                 }
2523                 break;
2524         default:
2525                 IEEE80211_DISCARD(vap,
2526                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2527                     wh, NULL, "received confirm in invalid state %d",
2528                     ni->ni_mlstate);
2529                 vap->iv_stats.is_rx_mgtdiscard++;
2530                 break;
2531         }
2532         return 0;
2533 }
2534
2535 static int
2536 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2537         const struct ieee80211_frame *wh,
2538         const uint8_t *frm, const uint8_t *efrm)
2539 {
2540         struct ieee80211_meshpeer_ie ie;
2541         const struct ieee80211_meshpeer_ie *meshpeer;
2542         uint16_t args[3];
2543
2544         /* +2 for action + code */
2545         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2546             IEEE80211_ACTION_MESHPEERING_CLOSE);
2547         if (meshpeer == NULL) {
2548                 return 0;
2549         }
2550
2551         /*
2552          * XXX: check reason code, for example we could receive
2553          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2554          * to peer again.
2555          */
2556
2557         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2558             ni, "%s", "recv PEER CLOSE");
2559
2560         switch (ni->ni_mlstate) {
2561         case IEEE80211_NODE_MESH_IDLE:
2562                 /* ignore */
2563                 break;
2564         case IEEE80211_NODE_MESH_OPENRCV:
2565         case IEEE80211_NODE_MESH_OPENSNT:
2566         case IEEE80211_NODE_MESH_CONFIRMRCV:
2567         case IEEE80211_NODE_MESH_ESTABLISHED:
2568                 args[0] = ni->ni_mlpid;
2569                 args[1] = ni->ni_mllid;
2570                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2571                 ieee80211_send_action(ni,
2572                     IEEE80211_ACTION_CAT_SELF_PROT,
2573                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2574                     args);
2575                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2576                 mesh_peer_timeout_setup(ni);
2577                 break;
2578         case IEEE80211_NODE_MESH_HOLDING:
2579                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2580                 mesh_peer_timeout_stop(ni);
2581                 break;
2582         }
2583         return 0;
2584 }
2585
2586 /*
2587  * Link Metric handling.
2588  */
2589 static int
2590 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2591         const struct ieee80211_frame *wh,
2592         const uint8_t *frm, const uint8_t *efrm)
2593 {
2594         const struct ieee80211_meshlmetric_ie *ie =
2595             (const struct ieee80211_meshlmetric_ie *)
2596             (frm+2); /* action + code */
2597         struct ieee80211_meshlmetric_ie lm_rep;
2598
2599         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2600                 lm_rep.lm_flags = 0;
2601                 lm_rep.lm_metric = mesh_airtime_calc(ni);
2602                 ieee80211_send_action(ni,
2603                     IEEE80211_ACTION_CAT_MESH,
2604                     IEEE80211_ACTION_MESH_LMETRIC,
2605                     &lm_rep);
2606         }
2607         /* XXX: else do nothing for now */
2608         return 0;
2609 }
2610
2611 /*
2612  * Parse meshgate action ie's for GANN frames.
2613  * Returns -1 if parsing fails, otherwise 0.
2614  */
2615 static int
2616 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2617     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
2618     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2619 {
2620         struct ieee80211vap *vap = ni->ni_vap;
2621         const struct ieee80211_meshgann_ie *gannie;
2622
2623         while (efrm - frm > 1) {
2624                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2625                 switch (*frm) {
2626                 case IEEE80211_ELEMID_MESHGANN:
2627                         gannie = (const struct ieee80211_meshgann_ie *) frm;
2628                         memset(ie, 0, sizeof(ie));
2629                         ie->gann_ie = gannie->gann_ie;
2630                         ie->gann_len = gannie->gann_len;
2631                         ie->gann_flags = gannie->gann_flags;
2632                         ie->gann_hopcount = gannie->gann_hopcount;
2633                         ie->gann_ttl = gannie->gann_ttl;
2634                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2635                         ie->gann_seq = LE_READ_4(&gannie->gann_seq);
2636                         ie->gann_interval = LE_READ_2(&gannie->gann_interval);
2637                         break;
2638                 }
2639                 frm += frm[1] + 2;
2640         }
2641
2642         return 0;
2643 }
2644
2645 /*
2646  * Mesh Gate Announcement handling.
2647  */
2648 static int
2649 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2650         const struct ieee80211_frame *wh,
2651         const uint8_t *frm, const uint8_t *efrm)
2652 {
2653         struct ieee80211vap *vap = ni->ni_vap;
2654         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2655         struct ieee80211_mesh_gate_route *gr, *next;
2656         struct ieee80211_mesh_route *rt_gate;
2657         struct ieee80211_meshgann_ie pgann;
2658         struct ieee80211_meshgann_ie ie;
2659         int found = 0;
2660
2661         /* +2 for action + code */
2662         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2663                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2664                     ni->ni_macaddr, NULL, "%s",
2665                     "GANN parsing failed");
2666                 vap->iv_stats.is_rx_mgtdiscard++;
2667                 return (0);
2668         }
2669
2670         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2671                 return 0;
2672
2673         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2674             "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2675             ie.gann_seq);
2676
2677         if (ms == NULL)
2678                 return (0);
2679         MESH_RT_LOCK(ms);
2680         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2681                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2682                         continue;
2683                 if (ie.gann_seq <= gr->gr_lastseq) {
2684                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2685                             ni->ni_macaddr, NULL,
2686                             "GANN old seqno %u <= %u",
2687                             ie.gann_seq, gr->gr_lastseq);
2688                         MESH_RT_UNLOCK(ms);
2689                         return (0);
2690                 }
2691                 /* corresponding mesh gate found & GANN accepted */
2692                 found = 1;
2693                 break;
2694
2695         }
2696         if (found == 0) {
2697                 /* this GANN is from a new mesh Gate add it to known table. */
2698                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2699                     "stored new GANN information, seq %u.", ie.gann_seq);
2700                 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2701                     M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO);
2702                 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2703                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2704         }
2705         gr->gr_lastseq = ie.gann_seq;
2706
2707         /* check if we have a path to this gate */
2708         rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2709         if (rt_gate != NULL &&
2710             rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2711                 gr->gr_route = rt_gate;
2712                 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2713         }
2714
2715         MESH_RT_UNLOCK(ms);
2716
2717         /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2718         if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2719                 return 0;
2720                 pgann.gann_flags = ie.gann_flags; /* Reserved */
2721         pgann.gann_hopcount = ie.gann_hopcount + 1;
2722         pgann.gann_ttl = ie.gann_ttl - 1;
2723         IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2724         pgann.gann_seq = ie.gann_seq;
2725         pgann.gann_interval = ie.gann_interval;
2726
2727         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2728             "%s", "propagate GANN");
2729
2730         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2731             IEEE80211_ACTION_MESH_GANN, &pgann);
2732
2733         return 0;
2734 }
2735
2736 static int
2737 mesh_send_action(struct ieee80211_node *ni,
2738     const uint8_t sa[IEEE80211_ADDR_LEN],
2739     const uint8_t da[IEEE80211_ADDR_LEN],
2740     struct mbuf *m)
2741 {
2742         struct ieee80211vap *vap = ni->ni_vap;
2743         struct ieee80211com *ic = ni->ni_ic;
2744         struct ieee80211_bpf_params params;
2745         struct ieee80211_frame *wh;
2746
2747         KASSERT(ni != NULL, ("null node"));
2748
2749         if (vap->iv_state == IEEE80211_S_CAC) {
2750                 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2751                     "block %s frame in CAC state", "Mesh action");
2752                 vap->iv_stats.is_tx_badstate++;
2753                 ieee80211_free_node(ni);
2754                 m_freem(m);
2755                 return EIO;             /* XXX */
2756         }
2757
2758         M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT);
2759         if (m == NULL) {
2760                 ieee80211_free_node(ni);
2761                 return ENOMEM;
2762         }
2763
2764         wh = mtod(m, struct ieee80211_frame *);
2765         ieee80211_send_setup(ni, m,
2766              IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2767              IEEE80211_NONQOS_TID, sa, da, sa);
2768         m->m_flags |= M_ENCAP;          /* mark encapsulated */
2769
2770         memset(&params, 0, sizeof(params));
2771         params.ibp_pri = WME_AC_VO;
2772         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2773         if (IEEE80211_IS_MULTICAST(da))
2774                 params.ibp_try0 = 1;
2775         else
2776                 params.ibp_try0 = ni->ni_txparms->maxretry;
2777         params.ibp_power = ni->ni_txpower;
2778
2779         IEEE80211_NODE_STAT(ni, tx_mgmt);
2780
2781         return ic->ic_raw_xmit(ni, m, &params);
2782 }
2783
2784 #define ADDSHORT(frm, v) do {                   \
2785         frm[0] = (v) & 0xff;                    \
2786         frm[1] = (v) >> 8;                      \
2787         frm += 2;                               \
2788 } while (0)
2789 #define ADDWORD(frm, v) do {                    \
2790         frm[0] = (v) & 0xff;                    \
2791         frm[1] = ((v) >> 8) & 0xff;             \
2792         frm[2] = ((v) >> 16) & 0xff;            \
2793         frm[3] = ((v) >> 24) & 0xff;            \
2794         frm += 4;                               \
2795 } while (0)
2796
2797 static int
2798 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2799         int category, int action, void *args0)
2800 {
2801         struct ieee80211vap *vap = ni->ni_vap;
2802         struct ieee80211com *ic = ni->ni_ic;
2803         uint16_t *args = args0;
2804         const struct ieee80211_rateset *rs;
2805         struct mbuf *m;
2806         uint8_t *frm;
2807
2808         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2809             "send PEER OPEN action: localid 0x%x", args[0]);
2810
2811         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2812             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2813             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2814         ieee80211_ref_node(ni);
2815
2816         m = ieee80211_getmgtframe(&frm,
2817             ic->ic_headroom + sizeof(struct ieee80211_frame),
2818             sizeof(uint16_t)    /* action+category */
2819             + sizeof(uint16_t)  /* capabilites */
2820             + 2 + IEEE80211_RATE_SIZE
2821             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2822             + 2 + IEEE80211_MESHID_LEN
2823             + sizeof(struct ieee80211_meshconf_ie)
2824             + sizeof(struct ieee80211_meshpeer_ie)
2825         );
2826         if (m != NULL) {
2827                 /*
2828                  * mesh peer open action frame format:
2829                  *   [1] category
2830                  *   [1] action
2831                  *   [2] capabilities
2832                  *   [tlv] rates
2833                  *   [tlv] xrates
2834                  *   [tlv] mesh id
2835                  *   [tlv] mesh conf
2836                  *   [tlv] mesh peer link mgmt
2837                  */
2838                 *frm++ = category;
2839                 *frm++ = action;
2840                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2841                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2842                 frm = ieee80211_add_rates(frm, rs);
2843                 frm = ieee80211_add_xrates(frm, rs);
2844                 frm = ieee80211_add_meshid(frm, vap);
2845                 frm = ieee80211_add_meshconf(frm, vap);
2846                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2847                     args[0], 0, 0);
2848                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2849                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2850         } else {
2851                 vap->iv_stats.is_tx_nobuf++;
2852                 ieee80211_free_node(ni);
2853                 return ENOMEM;
2854         }
2855 }
2856
2857 static int
2858 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2859         int category, int action, void *args0)
2860 {
2861         struct ieee80211vap *vap = ni->ni_vap;
2862         struct ieee80211com *ic = ni->ni_ic;
2863         uint16_t *args = args0;
2864         const struct ieee80211_rateset *rs;
2865         struct mbuf *m;
2866         uint8_t *frm;
2867
2868         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2869             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2870             args[0], args[1]);
2871
2872         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2873             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2874             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2875         ieee80211_ref_node(ni);
2876
2877         m = ieee80211_getmgtframe(&frm,
2878             ic->ic_headroom + sizeof(struct ieee80211_frame),
2879             sizeof(uint16_t)    /* action+category */
2880             + sizeof(uint16_t)  /* capabilites */
2881             + sizeof(uint16_t)  /* status code */
2882             + sizeof(uint16_t)  /* AID */
2883             + 2 + IEEE80211_RATE_SIZE
2884             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2885             + 2 + IEEE80211_MESHID_LEN
2886             + sizeof(struct ieee80211_meshconf_ie)
2887             + sizeof(struct ieee80211_meshpeer_ie)
2888         );
2889         if (m != NULL) {
2890                 /*
2891                  * mesh peer confirm action frame format:
2892                  *   [1] category
2893                  *   [1] action
2894                  *   [2] capabilities
2895                  *   [2] status code
2896                  *   [2] association id (peer ID)
2897                  *   [tlv] rates
2898                  *   [tlv] xrates
2899                  *   [tlv] mesh id
2900                  *   [tlv] mesh conf
2901                  *   [tlv] mesh peer link mgmt
2902                  */
2903                 *frm++ = category;
2904                 *frm++ = action;
2905                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2906                 ADDSHORT(frm, 0);               /* status code */
2907                 ADDSHORT(frm, args[1]);         /* AID */
2908                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2909                 frm = ieee80211_add_rates(frm, rs);
2910                 frm = ieee80211_add_xrates(frm, rs);
2911                 frm = ieee80211_add_meshid(frm, vap);
2912                 frm = ieee80211_add_meshconf(frm, vap);
2913                 frm = ieee80211_add_meshpeer(frm,
2914                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2915                     args[0], args[1], 0);
2916                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2917                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2918         } else {
2919                 vap->iv_stats.is_tx_nobuf++;
2920                 ieee80211_free_node(ni);
2921                 return ENOMEM;
2922         }
2923 }
2924
2925 static int
2926 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2927         int category, int action, void *args0)
2928 {
2929         struct ieee80211vap *vap = ni->ni_vap;
2930         struct ieee80211com *ic = ni->ni_ic;
2931         uint16_t *args = args0;
2932         struct mbuf *m;
2933         uint8_t *frm;
2934
2935         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2936             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d",
2937             args[0], args[1], args[2]);
2938
2939         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2940             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2941             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2942         ieee80211_ref_node(ni);
2943
2944         m = ieee80211_getmgtframe(&frm,
2945             ic->ic_headroom + sizeof(struct ieee80211_frame),
2946             sizeof(uint16_t)    /* action+category */
2947             + sizeof(uint16_t)  /* reason code */
2948             + 2 + IEEE80211_MESHID_LEN
2949             + sizeof(struct ieee80211_meshpeer_ie)
2950         );
2951         if (m != NULL) {
2952                 /*
2953                  * mesh peer close action frame format:
2954                  *   [1] category
2955                  *   [1] action
2956                  *   [tlv] mesh id
2957                  *   [tlv] mesh peer link mgmt
2958                  */
2959                 *frm++ = category;
2960                 *frm++ = action;
2961                 frm = ieee80211_add_meshid(frm, vap);
2962                 frm = ieee80211_add_meshpeer(frm,
2963                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2964                     args[0], args[1], args[2]);
2965                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2966                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2967         } else {
2968                 vap->iv_stats.is_tx_nobuf++;
2969                 ieee80211_free_node(ni);
2970                 return ENOMEM;
2971         }
2972 }
2973
2974 static int
2975 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2976         int category, int action, void *arg0)
2977 {
2978         struct ieee80211vap *vap = ni->ni_vap;
2979         struct ieee80211com *ic = ni->ni_ic;
2980         struct ieee80211_meshlmetric_ie *ie = arg0;
2981         struct mbuf *m;
2982         uint8_t *frm;
2983
2984         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2985                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2986                     ni, "%s", "send LINK METRIC REQUEST action");
2987         } else {
2988                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2989                     ni, "send LINK METRIC REPLY action: metric 0x%x",
2990                     ie->lm_metric);
2991         }
2992         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2993             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2994             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2995         ieee80211_ref_node(ni);
2996
2997         m = ieee80211_getmgtframe(&frm,
2998             ic->ic_headroom + sizeof(struct ieee80211_frame),
2999             sizeof(uint16_t) +  /* action+category */
3000             sizeof(struct ieee80211_meshlmetric_ie)
3001         );
3002         if (m != NULL) {
3003                 /*
3004                  * mesh link metric
3005                  *   [1] category
3006                  *   [1] action
3007                  *   [tlv] mesh link metric
3008                  */
3009                 *frm++ = category;
3010                 *frm++ = action;
3011                 frm = ieee80211_add_meshlmetric(frm,
3012                     ie->lm_flags, ie->lm_metric);
3013                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
3014                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
3015         } else {
3016                 vap->iv_stats.is_tx_nobuf++;
3017                 ieee80211_free_node(ni);
3018                 return ENOMEM;
3019         }
3020 }
3021
3022 static int
3023 mesh_send_action_meshgate(struct ieee80211_node *ni,
3024         int category, int action, void *arg0)
3025 {
3026         struct ieee80211vap *vap = ni->ni_vap;
3027         struct ieee80211com *ic = ni->ni_ic;
3028         struct ieee80211_meshgann_ie *ie = arg0;
3029         struct mbuf *m;
3030         uint8_t *frm;
3031
3032         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
3033             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
3034             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
3035         ieee80211_ref_node(ni);
3036
3037         m = ieee80211_getmgtframe(&frm,
3038             ic->ic_headroom + sizeof(struct ieee80211_frame),
3039             sizeof(uint16_t) +  /* action+category */
3040             IEEE80211_MESHGANN_BASE_SZ
3041         );
3042         if (m != NULL) {
3043                 /*
3044                  * mesh link metric
3045                  *   [1] category
3046                  *   [1] action
3047                  *   [tlv] mesh gate annoucement
3048                  */
3049                 *frm++ = category;
3050                 *frm++ = action;
3051                 frm = ieee80211_add_meshgate(frm, ie);
3052                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
3053                 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
3054         } else {
3055                 vap->iv_stats.is_tx_nobuf++;
3056                 ieee80211_free_node(ni);
3057                 return ENOMEM;
3058         }
3059 }
3060
3061 static void
3062 mesh_peer_timeout_setup(struct ieee80211_node *ni)
3063 {
3064         switch (ni->ni_mlstate) {
3065         case IEEE80211_NODE_MESH_HOLDING:
3066                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
3067                 break;
3068         case IEEE80211_NODE_MESH_CONFIRMRCV:
3069                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
3070                 break;
3071         case IEEE80211_NODE_MESH_IDLE:
3072                 ni->ni_mltval = 0;
3073                 break;
3074         default:
3075                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
3076                 break;
3077         }
3078         if (ni->ni_mltval)
3079                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
3080                     mesh_peer_timeout_cb, ni);
3081 }
3082
3083 /*
3084  * Same as above but backoffs timer statisically 50%.
3085  */
3086 static void
3087 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3088 {
3089         uint32_t r;
3090
3091         r = arc4random();
3092         ni->ni_mltval += r % ni->ni_mltval;
3093         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3094             ni);
3095 }
3096
3097 static __inline void
3098 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3099 {
3100         callout_drain(&ni->ni_mltimer);
3101 }
3102
3103 static void
3104 mesh_peer_backoff_cb(void *arg)
3105 {
3106         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3107
3108         /* After backoff timeout, try to peer automatically again. */
3109         ni->ni_mlhcnt = 0;
3110 }
3111
3112 /*
3113  * Mesh Peer Link Management FSM timeout handling.
3114  */
3115 static void
3116 mesh_peer_timeout_cb(void *arg)
3117 {
3118         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3119         uint16_t args[3];
3120
3121         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3122             ni, "mesh link timeout, state %d, retry counter %d",
3123             ni->ni_mlstate, ni->ni_mlrcnt);
3124
3125         switch (ni->ni_mlstate) {
3126         case IEEE80211_NODE_MESH_IDLE:
3127         case IEEE80211_NODE_MESH_ESTABLISHED:
3128                 break;
3129         case IEEE80211_NODE_MESH_OPENSNT:
3130         case IEEE80211_NODE_MESH_OPENRCV:
3131                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3132                         args[0] = ni->ni_mlpid;
3133                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3134                         ieee80211_send_action(ni,
3135                             IEEE80211_ACTION_CAT_SELF_PROT,
3136                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3137                         ni->ni_mlrcnt = 0;
3138                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3139                         mesh_peer_timeout_setup(ni);
3140                 } else {
3141                         args[0] = ni->ni_mlpid;
3142                         ieee80211_send_action(ni,
3143                             IEEE80211_ACTION_CAT_SELF_PROT,
3144                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
3145                         ni->ni_mlrcnt++;
3146                         mesh_peer_timeout_backoff(ni);
3147                 }
3148                 break;
3149         case IEEE80211_NODE_MESH_CONFIRMRCV:
3150                 args[0] = ni->ni_mlpid;
3151                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3152                 ieee80211_send_action(ni,
3153                     IEEE80211_ACTION_CAT_SELF_PROT,
3154                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3155                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3156                 mesh_peer_timeout_setup(ni);
3157                 break;
3158         case IEEE80211_NODE_MESH_HOLDING:
3159                 ni->ni_mlhcnt++;
3160                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3161                         callout_reset(&ni->ni_mlhtimer,
3162                             ieee80211_mesh_backofftimeout,
3163                             mesh_peer_backoff_cb, ni);
3164                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3165                 break;
3166         }
3167 }
3168
3169 static int
3170 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3171 {
3172         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3173
3174         if (ie == NULL || ie[1] != ms->ms_idlen)
3175                 return 1;
3176         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3177 }
3178
3179 /*
3180  * Check if we are using the same algorithms for this mesh.
3181  */
3182 static int
3183 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3184 {
3185         const struct ieee80211_meshconf_ie *meshconf =
3186             (const struct ieee80211_meshconf_ie *) ie;
3187         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3188
3189         if (meshconf == NULL)
3190                 return 1;
3191         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3192                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3193                     "unknown path selection algorithm: 0x%x\n",
3194                     meshconf->conf_pselid);
3195                 return 1;
3196         }
3197         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3198                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3199                     "unknown path metric algorithm: 0x%x\n",
3200                     meshconf->conf_pmetid);
3201                 return 1;
3202         }
3203         if (meshconf->conf_ccid != 0) {
3204                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3205                     "unknown congestion control algorithm: 0x%x\n",
3206                     meshconf->conf_ccid);
3207                 return 1;
3208         }
3209         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3210                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3211                     "unknown sync algorithm: 0x%x\n",
3212                     meshconf->conf_syncid);
3213                 return 1;
3214         }
3215         if (meshconf->conf_authid != 0) {
3216                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3217                     "unknown auth auth algorithm: 0x%x\n",
3218                     meshconf->conf_pselid);
3219                 return 1;
3220         }
3221         /* Not accepting peers */
3222         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3223                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3224                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
3225                 return 1;
3226         }
3227         return 0;
3228 }
3229
3230 static int
3231 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3232     const uint8_t *ie)
3233 {
3234         const struct ieee80211_meshpeer_ie *meshpeer =
3235             (const struct ieee80211_meshpeer_ie *) ie;
3236
3237         if (meshpeer == NULL ||
3238             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3239             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3240                 return 1;
3241         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3242                 IEEE80211_DPRINTF(vap,
3243                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3244                     "Only MPM protocol is supported (proto: 0x%02X)",
3245                     meshpeer->peer_proto);
3246                 return 1;
3247         }
3248         switch (subtype) {
3249         case IEEE80211_ACTION_MESHPEERING_OPEN:
3250                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3251                         return 1;
3252                 break;
3253         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3254                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3255                         return 1;
3256                 break;
3257         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3258                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3259                         return 1;
3260                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3261                     meshpeer->peer_linkid != 0)
3262                         return 1;
3263                 if (meshpeer->peer_rcode == 0)
3264                         return 1;
3265                 break;
3266         }
3267         return 0;
3268 }
3269
3270 /*
3271  * Add a Mesh ID IE to a frame.
3272  */
3273 uint8_t *
3274 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3275 {
3276         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3277
3278         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3279
3280         *frm++ = IEEE80211_ELEMID_MESHID;
3281         *frm++ = ms->ms_idlen;
3282         memcpy(frm, ms->ms_id, ms->ms_idlen);
3283         return frm + ms->ms_idlen;
3284 }
3285
3286 /*
3287  * Add a Mesh Configuration IE to a frame.
3288  * For now just use HWMP routing, Airtime link metric, Null Congestion
3289  * Signaling, Null Sync Protocol and Null Authentication.
3290  */
3291 uint8_t *
3292 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3293 {
3294         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3295         uint16_t caps;
3296
3297         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3298
3299         *frm++ = IEEE80211_ELEMID_MESHCONF;
3300         *frm++ = IEEE80211_MESH_CONF_SZ;
3301         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
3302         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
3303         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3304         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3305         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3306         /* NB: set the number of neighbors before the rest */
3307         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3308             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3309         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3310                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3311         frm += 1;
3312         caps = 0;
3313         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3314                 caps |= IEEE80211_MESHCONF_CAP_AP;
3315         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3316                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3317         *frm++ = caps;
3318         return frm;
3319 }
3320
3321 /*
3322  * Add a Mesh Peer Management IE to a frame.
3323  */
3324 uint8_t *
3325 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3326     uint16_t peerid, uint16_t reason)
3327 {
3328
3329         KASSERT(localid != 0, ("localid == 0"));
3330
3331         *frm++ = IEEE80211_ELEMID_MESHPEER;
3332         switch (subtype) {
3333         case IEEE80211_ACTION_MESHPEERING_OPEN:
3334                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
3335                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3336                 ADDSHORT(frm, localid);                 /* local ID */
3337                 break;
3338         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3339                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3340                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
3341                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3342                 ADDSHORT(frm, localid);                 /* local ID */
3343                 ADDSHORT(frm, peerid);                  /* peer ID */
3344                 break;
3345         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3346                 if (peerid)
3347                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
3348                 else
3349                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3350                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3351                 ADDSHORT(frm, localid); /* local ID */
3352                 if (peerid)
3353                         ADDSHORT(frm, peerid);  /* peer ID */
3354                 ADDSHORT(frm, reason);
3355                 break;
3356         }
3357         return frm;
3358 }
3359
3360 /*
3361  * Compute an Airtime Link Metric for the link with this node.
3362  *
3363  * Based on Draft 3.0 spec (11B.10, p.149).
3364  */
3365 /*
3366  * Max 802.11s overhead.
3367  */
3368 #define IEEE80211_MESH_MAXOVERHEAD \
3369         (sizeof(struct ieee80211_qosframe_addr4) \
3370          + sizeof(struct ieee80211_meshcntl_ae10) \
3371         + sizeof(struct llc) \
3372         + IEEE80211_ADDR_LEN \
3373         + IEEE80211_WEP_IVLEN \
3374         + IEEE80211_WEP_KIDLEN \
3375         + IEEE80211_WEP_CRCLEN \
3376         + IEEE80211_WEP_MICLEN \
3377         + IEEE80211_CRC_LEN)
3378 uint32_t
3379 mesh_airtime_calc(struct ieee80211_node *ni)
3380 {
3381 #define M_BITS 8
3382 #define S_FACTOR (2 * M_BITS)
3383         struct ieee80211com *ic = ni->ni_ic;
3384         struct ifnet *ifp = ni->ni_vap->iv_ifp;
3385         const static int nbits = 8192 << M_BITS;
3386         uint32_t overhead, rate, errrate;
3387         uint64_t res;
3388
3389         /* Time to transmit a frame */
3390         rate = ni->ni_txrate;
3391         overhead = ieee80211_compute_duration(ic->ic_rt,
3392             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3393         /* Error rate in percentage */
3394         /* XXX assuming small failures are ok */
3395         errrate = (((ifp->if_oerrors +
3396             ifp->if_ierrors) / 100) << M_BITS) / 100;
3397         res = (overhead + (nbits / rate)) *
3398             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3399
3400         return (uint32_t)(res >> S_FACTOR);
3401 #undef M_BITS
3402 #undef S_FACTOR
3403 }
3404
3405 /*
3406  * Add a Mesh Link Metric report IE to a frame.
3407  */
3408 uint8_t *
3409 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3410 {
3411         *frm++ = IEEE80211_ELEMID_MESHLINK;
3412         *frm++ = 5;
3413         *frm++ = flags;
3414         ADDWORD(frm, metric);
3415         return frm;
3416 }
3417
3418 /*
3419  * Add a Mesh Gate Announcement IE to a frame.
3420  */
3421 uint8_t *
3422 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3423 {
3424         *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3425         *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3426         *frm++ = ie->gann_flags;
3427         *frm++ = ie->gann_hopcount;
3428         *frm++ = ie->gann_ttl;
3429         IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3430         frm += 6;
3431         ADDWORD(frm, ie->gann_seq);
3432         ADDSHORT(frm, ie->gann_interval);
3433         return frm;
3434 }
3435 #undef ADDSHORT
3436 #undef ADDWORD
3437
3438 /*
3439  * Initialize any mesh-specific node state.
3440  */
3441 void
3442 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3443 {
3444         ni->ni_flags |= IEEE80211_NODE_QOS;
3445         callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE);
3446         callout_init(&ni->ni_mlhtimer, CALLOUT_MPSAFE);
3447 }
3448
3449 /*
3450  * Cleanup any mesh-specific node state.
3451  */
3452 void
3453 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3454 {
3455         struct ieee80211vap *vap = ni->ni_vap;
3456         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3457
3458         callout_drain(&ni->ni_mltimer);
3459         callout_drain(&ni->ni_mlhtimer);
3460         /* NB: short-circuit callbacks after mesh_vdetach */
3461         if (vap->iv_mesh != NULL)
3462                 ms->ms_ppath->mpp_peerdown(ni);
3463 }
3464
3465 void
3466 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3467 {
3468         ni->ni_meshidlen = ie[1];
3469         memcpy(ni->ni_meshid, ie + 2, ie[1]);
3470 }
3471
3472 /*
3473  * Setup mesh-specific node state on neighbor discovery.
3474  */
3475 void
3476 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3477         const struct ieee80211_frame *wh,
3478         const struct ieee80211_scanparams *sp)
3479 {
3480         ieee80211_parse_meshid(ni, sp->meshid);
3481 }
3482
3483 void
3484 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3485         struct ieee80211_beacon_offsets *bo)
3486 {
3487         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3488
3489         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3490                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3491                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3492         }
3493 }
3494
3495 static int
3496 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3497 {
3498         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3499         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3500         struct ieee80211_mesh_route *rt;
3501         struct ieee80211req_mesh_route *imr;
3502         size_t len, off;
3503         uint8_t *p;
3504         int error;
3505
3506         if (vap->iv_opmode != IEEE80211_M_MBSS)
3507                 return ENOSYS;
3508
3509         error = 0;
3510         switch (ireq->i_type) {
3511         case IEEE80211_IOC_MESH_ID:
3512                 ireq->i_len = ms->ms_idlen;
3513                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3514                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3515                 break;
3516         case IEEE80211_IOC_MESH_AP:
3517                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3518                 break;
3519         case IEEE80211_IOC_MESH_FWRD:
3520                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3521                 break;
3522         case IEEE80211_IOC_MESH_GATE:
3523                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3524                 break;
3525         case IEEE80211_IOC_MESH_TTL:
3526                 ireq->i_val = ms->ms_ttl;
3527                 break;
3528         case IEEE80211_IOC_MESH_RTCMD:
3529                 switch (ireq->i_val) {
3530                 case IEEE80211_MESH_RTCMD_LIST:
3531                         len = 0;
3532                         MESH_RT_LOCK(ms);
3533                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3534                                 len += sizeof(*imr);
3535                         }
3536                         MESH_RT_UNLOCK(ms);
3537                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3538                                 ireq->i_len = len;
3539                                 return ENOMEM;
3540                         }
3541                         ireq->i_len = len;
3542                         /* XXX M_WAIT? */
3543                         p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO);
3544                         if (p == NULL)
3545                                 return ENOMEM;
3546                         off = 0;
3547                         MESH_RT_LOCK(ms);
3548                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3549                                 if (off >= len)
3550                                         break;
3551                                 imr = (struct ieee80211req_mesh_route *)
3552                                     (p + off);
3553                                 IEEE80211_ADDR_COPY(imr->imr_dest,
3554                                     rt->rt_dest);
3555                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3556                                     rt->rt_nexthop);
3557                                 imr->imr_metric = rt->rt_metric;
3558                                 imr->imr_nhops = rt->rt_nhops;
3559                                 imr->imr_lifetime =
3560                                     ieee80211_mesh_rt_update(rt, 0);
3561                                 imr->imr_lastmseq = rt->rt_lastmseq;
3562                                 imr->imr_flags = rt->rt_flags; /* last */
3563                                 off += sizeof(*imr);
3564                         }
3565                         MESH_RT_UNLOCK(ms);
3566                         error = copyout(p, (uint8_t *)ireq->i_data,
3567                             ireq->i_len);
3568                         free(p, M_TEMP);
3569                         break;
3570                 case IEEE80211_MESH_RTCMD_FLUSH:
3571                 case IEEE80211_MESH_RTCMD_ADD:
3572                 case IEEE80211_MESH_RTCMD_DELETE:
3573                         return EINVAL;
3574                 default:
3575                         return ENOSYS;
3576                 }
3577                 break;
3578         case IEEE80211_IOC_MESH_PR_METRIC:
3579                 len = strlen(ms->ms_pmetric->mpm_descr);
3580                 if (ireq->i_len < len)
3581                         return EINVAL;
3582                 ireq->i_len = len;
3583                 error = copyout(ms->ms_pmetric->mpm_descr,
3584                     (uint8_t *)ireq->i_data, len);
3585                 break;
3586         case IEEE80211_IOC_MESH_PR_PATH:
3587                 len = strlen(ms->ms_ppath->mpp_descr);
3588                 if (ireq->i_len < len)
3589                         return EINVAL;
3590                 ireq->i_len = len;
3591                 error = copyout(ms->ms_ppath->mpp_descr,
3592                     (uint8_t *)ireq->i_data, len);
3593                 break;
3594         default:
3595                 return ENOSYS;
3596         }
3597
3598         return error;
3599 }
3600 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3601
3602 static int
3603 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3604 {
3605         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3606         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3607         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3608         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3609         int error;
3610
3611         if (vap->iv_opmode != IEEE80211_M_MBSS)
3612                 return ENOSYS;
3613
3614         error = 0;
3615         switch (ireq->i_type) {
3616         case IEEE80211_IOC_MESH_ID:
3617                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3618                         return EINVAL;
3619                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3620                 if (error != 0)
3621                         break;
3622                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3623                 ms->ms_idlen = ireq->i_len;
3624                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3625                 error = ENETRESET;
3626                 break;
3627         case IEEE80211_IOC_MESH_AP:
3628                 if (ireq->i_val)
3629                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3630                 else
3631                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3632                 error = ENETRESET;
3633                 break;
3634         case IEEE80211_IOC_MESH_FWRD:
3635                 if (ireq->i_val)
3636                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3637                 else
3638                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3639                 mesh_gatemode_setup(vap);
3640                 break;
3641         case IEEE80211_IOC_MESH_GATE:
3642                 if (ireq->i_val)
3643                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3644                 else
3645                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3646                 break;
3647         case IEEE80211_IOC_MESH_TTL:
3648                 ms->ms_ttl = (uint8_t) ireq->i_val;
3649                 break;
3650         case IEEE80211_IOC_MESH_RTCMD:
3651                 switch (ireq->i_val) {
3652                 case IEEE80211_MESH_RTCMD_LIST:
3653                         return EINVAL;
3654                 case IEEE80211_MESH_RTCMD_FLUSH:
3655                         ieee80211_mesh_rt_flush(vap);
3656                         break;
3657                 case IEEE80211_MESH_RTCMD_ADD:
3658                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
3659                             IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
3660                                 return EINVAL;
3661                         error = copyin(ireq->i_data, &tmpaddr,
3662                             IEEE80211_ADDR_LEN);
3663                         if (error == 0)
3664                                 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3665                         break;
3666                 case IEEE80211_MESH_RTCMD_DELETE:
3667                         ieee80211_mesh_rt_del(vap, ireq->i_data);
3668                         break;
3669                 default:
3670                         return ENOSYS;
3671                 }
3672                 break;
3673         case IEEE80211_IOC_MESH_PR_METRIC:
3674                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3675                 if (error == 0) {
3676                         error = mesh_select_proto_metric(vap, tmpproto);
3677                         if (error == 0)
3678                                 error = ENETRESET;
3679                 }
3680                 break;
3681         case IEEE80211_IOC_MESH_PR_PATH:
3682                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3683                 if (error == 0) {
3684                         error = mesh_select_proto_path(vap, tmpproto);
3685                         if (error == 0)
3686                                 error = ENETRESET;
3687                 }
3688                 break;
3689         default:
3690                 return ENOSYS;
3691         }
3692         return error;
3693 }
3694 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);