sys/net80211/ieee80211_mesh.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2009 The FreeBSD Foundation
   5  *
   6  * This software was developed by Rui Paulo under sponsorship from the
   7  * FreeBSD Foundation.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30 #include <sys/cdefs.h>
  31 #ifdef __FreeBSD__
  32 __FBSDID("$FreeBSD$");
  33 #endif
  34
  35 /*
  36  * IEEE 802.11s Mesh Point (MBSS) support.
  37  *
  38  * Based on March 2009, D3.0 802.11s draft spec.
  39  */
  40 #include "opt_inet.h"
  41 #include "opt_wlan.h"
  42
  43 #include <sys/param.h>
  44 #include <sys/systm.h>
  45 #include <sys/mbuf.h>
  46 #include <sys/malloc.h>
  47 #include <sys/kernel.h>
  48
  49 #include <sys/socket.h>
  50 #include <sys/sockio.h>
  51 #include <sys/endian.h>
  52 #include <sys/errno.h>
  53 #include <sys/proc.h>
  54 #include <sys/sysctl.h>
  55
  56 #include <net/bpf.h>
  57 #include <net/if.h>
  58 #include <net/if_var.h>
  59 #include <net/if_media.h>
  60 #include <net/if_llc.h>
  61 #include <net/ethernet.h>
  62
  63 #include <net80211/ieee80211_var.h>
  64 #include <net80211/ieee80211_action.h>
  65 #ifdef IEEE80211_SUPPORT_SUPERG
  66 #include <net80211/ieee80211_superg.h>
  67 #endif
  68 #include <net80211/ieee80211_input.h>
  69 #include <net80211/ieee80211_mesh.h>
  70
  71 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
  72 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
  73 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
  74 static void     mesh_vattach(struct ieee80211vap *);
  75 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  76 static void     mesh_rt_cleanup_cb(void *);
  77 static void     mesh_gatemode_setup(struct ieee80211vap *);
  78 static void     mesh_gatemode_cb(void *);
  79 static void     mesh_linkchange(struct ieee80211_node *,
  80                     enum ieee80211_mesh_mlstate);
  81 static void     mesh_checkid(void *, struct ieee80211_node *);
  82 static uint32_t mesh_generateid(struct ieee80211vap *);
  83 static int      mesh_checkpseq(struct ieee80211vap *,
  84                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
  85 static void     mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
  86                     struct ieee80211_mesh_route *);
  87 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
  88                     const struct ieee80211_meshcntl *);
  89 static int      mesh_input(struct ieee80211_node *, struct mbuf *,
  90                     const struct ieee80211_rx_stats *rxs, int, int);
  91 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
  92                     const struct ieee80211_rx_stats *rxs, int, int);
  93 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  94 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
  95 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
  96 static void     mesh_peer_timeout_cb(void *);
  97 static __inline void
  98                 mesh_peer_timeout_stop(struct ieee80211_node *);
  99 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
 100 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
 101 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
 102                     const uint8_t *);
 103 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
 104
 105 /*
 106  * Timeout values come from the specification and are in milliseconds.
 107  */
 108 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
 109     "IEEE 802.11s parameters");
 110 static int      ieee80211_mesh_gateint = -1;
 111 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint,
 112     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 113     &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
 114     "mesh gate interval (ms)");
 115 static int ieee80211_mesh_retrytimeout = -1;
 116 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout,
 117     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 118     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 119     "Retry timeout (msec)");
 120 static int ieee80211_mesh_holdingtimeout = -1;
 121
 122 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout,
 123     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 124     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 125     "Holding state timeout (msec)");
 126 static int ieee80211_mesh_confirmtimeout = -1;
 127 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout,
 128     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 129     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 130     "Confirm state timeout (msec)");
 131 static int ieee80211_mesh_backofftimeout = -1;
 132 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout,
 133     CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
 134     &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 135     "Backoff timeout (msec). This is to throutles peering forever when "
 136     "not receiving answer or is rejected by a neighbor");
 137 static int ieee80211_mesh_maxretries = 2;
 138 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLFLAG_RW,
 139     &ieee80211_mesh_maxretries, 0,
 140     "Maximum retries during peer link establishment");
 141 static int ieee80211_mesh_maxholding = 2;
 142 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLFLAG_RW,
 143     &ieee80211_mesh_maxholding, 0,
 144     "Maximum times we are allowed to transition to HOLDING state before "
 145     "backinoff during peer link establishment");
 146
 147 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
 148         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 149
 150 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
 151 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
 152 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
 153 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
 154 static  ieee80211_recv_action_func mesh_recv_action_meshgate;
 155
 156 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
 157 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
 158 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
 159 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
 160 static  ieee80211_send_action_func mesh_send_action_meshgate;
 161
 162 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
 163         .mpm_descr      = "AIRTIME",
 164         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
 165         .mpm_metric     = mesh_airtime_calc,
 166 };
 167
 168 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
 169 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
 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 = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_route)) +
 213             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT,
 214             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 215         if (rt != NULL) {
 216                 rt->rt_vap = vap;
 217                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
 218                 rt->rt_priv = (void *)ALIGN(&rt[1]);
 219                 MESH_RT_ENTRY_LOCK_INIT(rt, "MBSS_RT");
 220                 callout_init(&rt->rt_discovery, 1);
 221                 rt->rt_updtime = ticks; /* create time */
 222                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
 223         }
 224         return rt;
 225 }
 226
 227 struct ieee80211_mesh_route *
 228 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
 229     const uint8_t dest[IEEE80211_ADDR_LEN])
 230 {
 231         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 232         struct ieee80211_mesh_route *rt;
 233
 234         MESH_RT_LOCK(ms);
 235         rt = mesh_rt_find_locked(ms, dest);
 236         MESH_RT_UNLOCK(ms);
 237         return rt;
 238 }
 239
 240 struct ieee80211_mesh_route *
 241 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
 242     const uint8_t dest[IEEE80211_ADDR_LEN])
 243 {
 244         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 245         struct ieee80211_mesh_route *rt;
 246
 247         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
 248             ("%s: duplicate entry in the routing table", __func__));
 249         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
 250             ("%s: adding self to the routing table", __func__));
 251
 252         MESH_RT_LOCK(ms);
 253         rt = mesh_rt_add_locked(vap, dest);
 254         MESH_RT_UNLOCK(ms);
 255         return rt;
 256 }
 257
 258 /*
 259  * Update the route lifetime and returns the updated lifetime.
 260  * If new_lifetime is zero and route is timedout it will be invalidated.
 261  * new_lifetime is in msec
 262  */
 263 int
 264 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
 265 {
 266         int timesince, now;
 267         uint32_t lifetime = 0;
 268
 269         KASSERT(rt != NULL, ("route is NULL"));
 270
 271         now = ticks;
 272         MESH_RT_ENTRY_LOCK(rt);
 273
 274         /* dont clobber a proxy entry gated by us */
 275         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
 276                 MESH_RT_ENTRY_UNLOCK(rt);
 277                 return rt->rt_lifetime;
 278         }
 279
 280         timesince = ticks_to_msecs(now - rt->rt_updtime);
 281         rt->rt_updtime = now;
 282         if (timesince >= rt->rt_lifetime) {
 283                 if (new_lifetime != 0) {
 284                         rt->rt_lifetime = new_lifetime;
 285                 }
 286                 else {
 287                         rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
 288                         rt->rt_lifetime = 0;
 289                 }
 290         } else {
 291                 /* update what is left of lifetime */
 292                 rt->rt_lifetime = rt->rt_lifetime - timesince;
 293                 rt->rt_lifetime  = MESH_ROUTE_LIFETIME_MAX(
 294                         new_lifetime, rt->rt_lifetime);
 295         }
 296         lifetime = rt->rt_lifetime;
 297         MESH_RT_ENTRY_UNLOCK(rt);
 298
 299         return lifetime;
 300 }
 301
 302 /*
 303  * Add a proxy route (as needed) for the specified destination.
 304  */
 305 void
 306 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
 307     const uint8_t dest[IEEE80211_ADDR_LEN])
 308 {
 309         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 310         struct ieee80211_mesh_route *rt;
 311
 312         MESH_RT_LOCK(ms);
 313         rt = mesh_rt_find_locked(ms, dest);
 314         if (rt == NULL) {
 315                 rt = mesh_rt_add_locked(vap, dest);
 316                 if (rt == NULL) {
 317                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 318                             "%s", "unable to add proxy entry");
 319                         vap->iv_stats.is_mesh_rtaddfailed++;
 320                 } else {
 321                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 322                             "%s", "add proxy entry");
 323                         IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
 324                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 325                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 326                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
 327                 }
 328         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 329                 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
 330                     ("no proxy flag for poxy entry"));
 331                 struct ieee80211com *ic = vap->iv_ic;
 332                 /*
 333                  * Fix existing entry created by received frames from
 334                  * stations that have some memory of dest.  We also
 335                  * flush any frames held on the staging queue; delivering
 336                  * them is too much trouble right now.
 337                  */
 338                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 339                     "%s", "fix proxy entry");
 340                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 341                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 342                              |  IEEE80211_MESHRT_FLAGS_PROXY;
 343                 /* XXX belongs in hwmp */
 344                 ieee80211_ageq_drain_node(&ic->ic_stageq,
 345                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
 346                 /* XXX stat? */
 347         }
 348         MESH_RT_UNLOCK(ms);
 349 }
 350
 351 static __inline void
 352 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
 353 {
 354         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
 355         /*
 356          * Grab the lock before destroying it, to be sure no one else
 357          * is holding the route.
 358          */
 359         MESH_RT_ENTRY_LOCK(rt);
 360         callout_drain(&rt->rt_discovery);
 361         MESH_RT_ENTRY_LOCK_DESTROY(rt);
 362         IEEE80211_FREE(rt, M_80211_MESH_RT);
 363 }
 364
 365 void
 366 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
 367     const uint8_t dest[IEEE80211_ADDR_LEN])
 368 {
 369         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 370         struct ieee80211_mesh_route *rt, *next;
 371
 372         MESH_RT_LOCK(ms);
 373         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 374                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
 375                         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
 376                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 377                                     IEEE80211_REASON_MESH_PERR_NO_PROXY);
 378                         } else {
 379                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 380                                     IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
 381                         }
 382                         mesh_rt_del(ms, rt);
 383                         MESH_RT_UNLOCK(ms);
 384                         return;
 385                 }
 386         }
 387         MESH_RT_UNLOCK(ms);
 388 }
 389
 390 void
 391 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
 392 {
 393         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 394         struct ieee80211_mesh_route *rt, *next;
 395
 396         if (ms == NULL)
 397                 return;
 398         MESH_RT_LOCK(ms);
 399         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
 400                 mesh_rt_del(ms, rt);
 401         MESH_RT_UNLOCK(ms);
 402 }
 403
 404 void
 405 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
 406     const uint8_t peer[IEEE80211_ADDR_LEN])
 407 {
 408         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 409         struct ieee80211_mesh_route *rt, *next;
 410
 411         MESH_RT_LOCK(ms);
 412         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 413                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
 414                         mesh_rt_del(ms, rt);
 415         }
 416         MESH_RT_UNLOCK(ms);
 417 }
 418
 419 /*
 420  * Flush expired routing entries, i.e. those in invalid state for
 421  * some time.
 422  */
 423 static void
 424 mesh_rt_flush_invalid(struct ieee80211vap *vap)
 425 {
 426         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 427         struct ieee80211_mesh_route *rt, *next;
 428
 429         if (ms == NULL)
 430                 return;
 431         MESH_RT_LOCK(ms);
 432         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 433                 /* Discover paths will be deleted by their own callout */
 434                 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
 435                         continue;
 436                 ieee80211_mesh_rt_update(rt, 0);
 437                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
 438                         mesh_rt_del(ms, rt);
 439         }
 440         MESH_RT_UNLOCK(ms);
 441 }
 442
 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 < nitems(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 < nitems(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 < nitems(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 < nitems(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
 512 static void
 513 mesh_gatemode_setup(struct ieee80211vap *vap)
 514 {
 515         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 516
 517         /*
 518          * NB: When a mesh gate is running as a ROOT it shall
 519          * not send out periodic GANNs but instead mark the
 520          * mesh gate flag for the corresponding proactive PREQ
 521          * and RANN frames.
 522          */
 523         if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
 524             (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
 525                 callout_drain(&ms->ms_gatetimer);
 526                 return ;
 527         }
 528         callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
 529             mesh_gatemode_cb, vap);
 530 }
 531
 532 static void
 533 mesh_gatemode_cb(void *arg)
 534 {
 535         struct ieee80211vap *vap = (struct ieee80211vap *)arg;
 536         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 537         struct ieee80211_meshgann_ie gann;
 538
 539         gann.gann_flags = 0; /* Reserved */
 540         gann.gann_hopcount = 0;
 541         gann.gann_ttl = ms->ms_ttl;
 542         IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
 543         gann.gann_seq = ms->ms_gateseq++;
 544         gann.gann_interval = ieee80211_mesh_gateint;
 545
 546         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
 547             "send broadcast GANN (seq %u)", gann.gann_seq);
 548
 549         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
 550             IEEE80211_ACTION_MESH_GANN, &gann);
 551         mesh_gatemode_setup(vap);
 552 }
 553
 554 static void
 555 ieee80211_mesh_init(void)
 556 {
 557
 558         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
 559         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
 560
 561         /*
 562          * Setup mesh parameters that depends on the clock frequency.
 563          */
 564         ieee80211_mesh_gateint = msecs_to_ticks(10000);
 565         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
 566         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
 567         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
 568         ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
 569
 570         /*
 571          * Register action frame handlers.
 572          */
 573         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 574             IEEE80211_ACTION_MESHPEERING_OPEN,
 575             mesh_recv_action_meshpeering_open);
 576         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 577             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 578             mesh_recv_action_meshpeering_confirm);
 579         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 580             IEEE80211_ACTION_MESHPEERING_CLOSE,
 581             mesh_recv_action_meshpeering_close);
 582         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 583             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
 584         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 585             IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
 586
 587         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 588             IEEE80211_ACTION_MESHPEERING_OPEN,
 589             mesh_send_action_meshpeering_open);
 590         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 591             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 592             mesh_send_action_meshpeering_confirm);
 593         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 594             IEEE80211_ACTION_MESHPEERING_CLOSE,
 595             mesh_send_action_meshpeering_close);
 596         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 597             IEEE80211_ACTION_MESH_LMETRIC,
 598             mesh_send_action_meshlmetric);
 599         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 600             IEEE80211_ACTION_MESH_GANN,
 601             mesh_send_action_meshgate);
 602
 603         /*
 604          * Register Airtime Link Metric.
 605          */
 606         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
 607
 608 }
 609 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
 610
 611 void
 612 ieee80211_mesh_attach(struct ieee80211com *ic)
 613 {
 614         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
 615 }
 616
 617 void
 618 ieee80211_mesh_detach(struct ieee80211com *ic)
 619 {
 620 }
 621
 622 static void
 623 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
 624 {
 625         struct ieee80211com *ic = ni->ni_ic;
 626         uint16_t args[3];
 627
 628         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
 629                 args[0] = ni->ni_mlpid;
 630                 args[1] = ni->ni_mllid;
 631                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 632                 ieee80211_send_action(ni,
 633                     IEEE80211_ACTION_CAT_SELF_PROT,
 634                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 635                     args);
 636         }
 637         callout_drain(&ni->ni_mltimer);
 638         /* XXX belongs in hwmp */
 639         ieee80211_ageq_drain_node(&ic->ic_stageq,
 640            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
 641 }
 642
 643 static void
 644 mesh_vdetach(struct ieee80211vap *vap)
 645 {
 646         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 647
 648         callout_drain(&ms->ms_cleantimer);
 649         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
 650             NULL);
 651         ieee80211_mesh_rt_flush(vap);
 652         MESH_RT_LOCK_DESTROY(ms);
 653         ms->ms_ppath->mpp_vdetach(vap);
 654         IEEE80211_FREE(vap->iv_mesh, M_80211_VAP);
 655         vap->iv_mesh = NULL;
 656 }
 657
 658 static void
 659 mesh_vattach(struct ieee80211vap *vap)
 660 {
 661         struct ieee80211_mesh_state *ms;
 662         vap->iv_newstate = mesh_newstate;
 663         vap->iv_input = mesh_input;
 664         vap->iv_opdetach = mesh_vdetach;
 665         vap->iv_recv_mgmt = mesh_recv_mgmt;
 666         vap->iv_recv_ctl = mesh_recv_ctl;
 667         ms = IEEE80211_MALLOC(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
 668             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 669         if (ms == NULL) {
 670                 printf("%s: couldn't alloc MBSS state\n", __func__);
 671                 return;
 672         }
 673         vap->iv_mesh = ms;
 674         ms->ms_seq = 0;
 675         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
 676         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
 677         TAILQ_INIT(&ms->ms_known_gates);
 678         TAILQ_INIT(&ms->ms_routes);
 679         MESH_RT_LOCK_INIT(ms, "MBSS");
 680         callout_init(&ms->ms_cleantimer, 1);
 681         callout_init(&ms->ms_gatetimer, 1);
 682         ms->ms_gateseq = 0;
 683         mesh_select_proto_metric(vap, "AIRTIME");
 684         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
 685         mesh_select_proto_path(vap, "HWMP");
 686         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
 687         ms->ms_ppath->mpp_vattach(vap);
 688 }
 689
 690 /*
 691  * IEEE80211_M_MBSS vap state machine handler.
 692  */
 693 static int
 694 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 695 {
 696         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 697         struct ieee80211com *ic = vap->iv_ic;
 698         struct ieee80211_node *ni;
 699         enum ieee80211_state ostate;
 700
 701         IEEE80211_LOCK_ASSERT(ic);
 702
 703         ostate = vap->iv_state;
 704         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 705             __func__, ieee80211_state_name[ostate],
 706             ieee80211_state_name[nstate], arg);
 707         vap->iv_state = nstate;         /* state transition */
 708         if (ostate != IEEE80211_S_SCAN)
 709                 ieee80211_cancel_scan(vap);     /* background scan */
 710         ni = vap->iv_bss;                       /* NB: no reference held */
 711         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
 712                 callout_drain(&ms->ms_cleantimer);
 713                 callout_drain(&ms->ms_gatetimer);
 714         }
 715         switch (nstate) {
 716         case IEEE80211_S_INIT:
 717                 switch (ostate) {
 718                 case IEEE80211_S_SCAN:
 719                         ieee80211_cancel_scan(vap);
 720                         break;
 721                 case IEEE80211_S_CAC:
 722                         ieee80211_dfs_cac_stop(vap);
 723                         break;
 724                 case IEEE80211_S_RUN:
 725                         ieee80211_iterate_nodes(&ic->ic_sta,
 726                             mesh_vdetach_peers, NULL);
 727                         break;
 728                 default:
 729                         break;
 730                 }
 731                 if (ostate != IEEE80211_S_INIT) {
 732                         /* NB: optimize INIT -> INIT case */
 733                         ieee80211_reset_bss(vap);
 734                         ieee80211_mesh_rt_flush(vap);
 735                 }
 736                 break;
 737         case IEEE80211_S_SCAN:
 738                 switch (ostate) {
 739                 case IEEE80211_S_INIT:
 740                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 741                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
 742                             ms->ms_idlen != 0) {
 743                                 /*
 744                                  * Already have a channel and a mesh ID; bypass
 745                                  * the scan and startup immediately.
 746                                  */
 747                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 748                                 break;
 749                         }
 750                         /*
 751                          * Initiate a scan.  We can come here as a result
 752                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 753                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 754                          * and the scan request parameters will be present
 755                          * in iv_scanreq.  Otherwise we do the default.
 756                         */
 757                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 758                                 ieee80211_check_scan(vap,
 759                                     vap->iv_scanreq_flags,
 760                                     vap->iv_scanreq_duration,
 761                                     vap->iv_scanreq_mindwell,
 762                                     vap->iv_scanreq_maxdwell,
 763                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 764                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 765                         } else
 766                                 ieee80211_check_scan_current(vap);
 767                         break;
 768                 default:
 769                         break;
 770                 }
 771                 break;
 772         case IEEE80211_S_CAC:
 773                 /*
 774                  * Start CAC on a DFS channel.  We come here when starting
 775                  * a bss on a DFS channel (see ieee80211_create_ibss).
 776                  */
 777                 ieee80211_dfs_cac_start(vap);
 778                 break;
 779         case IEEE80211_S_RUN:
 780                 switch (ostate) {
 781                 case IEEE80211_S_INIT:
 782                         /*
 783                          * Already have a channel; bypass the
 784                          * scan and startup immediately.
 785                          * Note that ieee80211_create_ibss will call
 786                          * back to do a RUN->RUN state change.
 787                          */
 788                         ieee80211_create_ibss(vap,
 789                             ieee80211_ht_adjust_channel(ic,
 790                                 ic->ic_curchan, vap->iv_flags_ht));
 791                         /* NB: iv_bss is changed on return */
 792                         break;
 793                 case IEEE80211_S_CAC:
 794                         /*
 795                          * NB: This is the normal state change when CAC
 796                          * expires and no radar was detected; no need to
 797                          * clear the CAC timer as it's already expired.
 798                          */
 799                         /* fall thru... */
 800                 case IEEE80211_S_CSA:
 801 #if 0
 802                         /*
 803                          * Shorten inactivity timer of associated stations
 804                          * to weed out sta's that don't follow a CSA.
 805                          */
 806                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 807 #endif
 808                         /*
 809                          * Update bss node channel to reflect where
 810                          * we landed after CSA.
 811                          */
 812                         ieee80211_node_set_chan(ni,
 813                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 814                                 ieee80211_htchanflags(ni->ni_chan)));
 815                         /* XXX bypass debug msgs */
 816                         break;
 817                 case IEEE80211_S_SCAN:
 818                 case IEEE80211_S_RUN:
 819 #ifdef IEEE80211_DEBUG
 820                         if (ieee80211_msg_debug(vap)) {
 821                                 ieee80211_note(vap,
 822                                     "synchronized with %s meshid ",
 823                                     ether_sprintf(ni->ni_meshid));
 824                                 ieee80211_print_essid(ni->ni_meshid,
 825                                     ni->ni_meshidlen);
 826                                 /* XXX MCS/HT */
 827                                 printf(" channel %d\n",
 828                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
 829                         }
 830 #endif
 831                         break;
 832                 default:
 833                         break;
 834                 }
 835                 ieee80211_node_authorize(ni);
 836                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 837                     mesh_rt_cleanup_cb, vap);
 838                 mesh_gatemode_setup(vap);
 839                 break;
 840         default:
 841                 break;
 842         }
 843         /* NB: ostate not nstate */
 844         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
 845         return 0;
 846 }
 847
 848 static void
 849 mesh_rt_cleanup_cb(void *arg)
 850 {
 851         struct ieee80211vap *vap = arg;
 852         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 853
 854         mesh_rt_flush_invalid(vap);
 855         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 856             mesh_rt_cleanup_cb, vap);
 857 }
 858
 859 /*
 860  * Mark a mesh STA as gate and return a pointer to it.
 861  * If this is first time, we create a new gate route.
 862  * Always update the path route to this mesh gate.
 863  */
 864 struct ieee80211_mesh_gate_route *
 865 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
 866     struct ieee80211_mesh_route *rt)
 867 {
 868         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 869         struct ieee80211_mesh_gate_route *gr = NULL, *next;
 870         int found = 0;
 871
 872         MESH_RT_LOCK(ms);
 873         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
 874                 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
 875                         found = 1;
 876                         break;
 877                 }
 878         }
 879
 880         if (!found) {
 881                 /* New mesh gate add it to known table. */
 882                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
 883                     "%s", "stored new gate information from pro-PREQ.");
 884                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
 885                     M_80211_MESH_GT_RT,
 886                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
 887                 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
 888                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
 889         }
 890         gr->gr_route = rt;
 891         /* TODO: link from path route to gate route */
 892         MESH_RT_UNLOCK(ms);
 893
 894         return gr;
 895 }
 896
 897 /*
 898  * Helper function to note the Mesh Peer Link FSM change.
 899  */
 900 static void
 901 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
 902 {
 903         struct ieee80211vap *vap = ni->ni_vap;
 904         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 905 #ifdef IEEE80211_DEBUG
 906         static const char *meshlinkstates[] = {
 907                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
 908                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
 909                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
 910                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
 911                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
 912                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
 913         };
 914 #endif
 915         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
 916             ni, "peer link: %s -> %s",
 917             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
 918
 919         /* track neighbor count */
 920         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
 921             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 922                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
 923                 ms->ms_neighbors++;
 924                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 925         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
 926             state != IEEE80211_NODE_MESH_ESTABLISHED) {
 927                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
 928                 ms->ms_neighbors--;
 929                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 930         }
 931         ni->ni_mlstate = state;
 932         switch (state) {
 933         case IEEE80211_NODE_MESH_HOLDING:
 934                 ms->ms_ppath->mpp_peerdown(ni);
 935                 break;
 936         case IEEE80211_NODE_MESH_ESTABLISHED:
 937                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
 938                 break;
 939         default:
 940                 break;
 941         }
 942 }
 943
 944 /*
 945  * Helper function to generate a unique local ID required for mesh
 946  * peer establishment.
 947  */
 948 static void
 949 mesh_checkid(void *arg, struct ieee80211_node *ni)
 950 {
 951         uint16_t *r = arg;
 952
 953         if (*r == ni->ni_mllid)
 954                 *(uint16_t *)arg = 0;
 955 }
 956
 957 static uint32_t
 958 mesh_generateid(struct ieee80211vap *vap)
 959 {
 960         int maxiter = 4;
 961         uint16_t r;
 962
 963         do {
 964                 net80211_get_random_bytes(&r, 2);
 965                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
 966                 maxiter--;
 967         } while (r == 0 && maxiter > 0);
 968         return r;
 969 }
 970
 971 /*
 972  * Verifies if we already received this packet by checking its
 973  * sequence number.
 974  * Returns 0 if the frame is to be accepted, 1 otherwise.
 975  */
 976 static int
 977 mesh_checkpseq(struct ieee80211vap *vap,
 978     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
 979 {
 980         struct ieee80211_mesh_route *rt;
 981
 982         rt = ieee80211_mesh_rt_find(vap, source);
 983         if (rt == NULL) {
 984                 rt = ieee80211_mesh_rt_add(vap, source);
 985                 if (rt == NULL) {
 986                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 987                             "%s", "add mcast route failed");
 988                         vap->iv_stats.is_mesh_rtaddfailed++;
 989                         return 1;
 990                 }
 991                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 992                     "add mcast route, mesh seqno %d", seq);
 993                 rt->rt_lastmseq = seq;
 994                 return 0;
 995         }
 996         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
 997                 return 1;
 998         } else {
 999                 rt->rt_lastmseq = seq;
1000                 return 0;
1001         }
1002 }
1003
1004 /*
1005  * Iterate the routing table and locate the next hop.
1006  */
1007 struct ieee80211_node *
1008 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1009     const uint8_t dest[IEEE80211_ADDR_LEN])
1010 {
1011         struct ieee80211_mesh_route *rt;
1012
1013         rt = ieee80211_mesh_rt_find(vap, dest);
1014         if (rt == NULL)
1015                 return NULL;
1016         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1017                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1018                     "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1019                 /* XXX stat */
1020                 return NULL;
1021         }
1022         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1023                 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1024                 if (rt == NULL) return NULL;
1025                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1026                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1027                             "%s: meshgate !valid, flags 0x%x", __func__,
1028                             rt->rt_flags);
1029                         /* XXX stat */
1030                         return NULL;
1031                 }
1032         }
1033         return ieee80211_find_txnode(vap, rt->rt_nexthop);
1034 }
1035
1036 static void
1037 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1038     struct ieee80211_mesh_route *rt_gate)
1039 {
1040         struct ifnet *ifp = vap->iv_ifp;
1041         struct ieee80211_node *ni;
1042
1043         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1044
1045         ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1046         if (ni == NULL) {
1047                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1048                 m_freem(m);
1049                 return;
1050         }
1051
1052         /*
1053          * Send through the VAP packet transmit path.
1054          * This consumes the node ref grabbed above and
1055          * the mbuf, regardless of whether there's a problem
1056          * or not.
1057          */
1058         (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1059 }
1060
1061 /*
1062  * Forward the queued frames to known valid mesh gates.
1063  * Assume destination to be outside the MBSS (i.e. proxy entry),
1064  * If no valid mesh gates are known silently discard queued frames.
1065  * After transmitting frames to all known valid mesh gates, this route
1066  * will be marked invalid, and a new path discovery will happen in the hopes
1067  * that (at least) one of the mesh gates have a new proxy entry for us to use.
1068  */
1069 void
1070 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1071     struct ieee80211_mesh_route *rt_dest)
1072 {
1073         struct ieee80211com *ic = vap->iv_ic;
1074         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1075         struct ieee80211_mesh_route *rt_gate;
1076         struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1077         struct mbuf *m, *mcopy, *next;
1078
1079         IEEE80211_TX_UNLOCK_ASSERT(ic);
1080
1081         KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1082             ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1083
1084         /* XXX: send to more than one valid mash gate */
1085         MESH_RT_LOCK(ms);
1086
1087         m = ieee80211_ageq_remove(&ic->ic_stageq,
1088             (struct ieee80211_node *)(uintptr_t)
1089             ieee80211_mac_hash(ic, rt_dest->rt_dest));
1090
1091         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1092                 rt_gate = gr->gr_route;
1093                 if (rt_gate == NULL) {
1094                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1095                                 rt_dest->rt_dest,
1096                                 "mesh gate with no path %6D",
1097                                 gr->gr_addr, ":");
1098                         continue;
1099                 }
1100                 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1101                         continue;
1102                 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1103                     ("route not marked as a mesh gate"));
1104                 KASSERT((rt_gate->rt_flags &
1105                         IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1106                         ("found mesh gate that is also marked porxy"));
1107                 /*
1108                  * convert route to a proxy route gated by the current
1109                  * mesh gate, this is needed so encap can built data
1110                  * frame with correct address.
1111                  */
1112                 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1113                         IEEE80211_MESHRT_FLAGS_VALID;
1114                 rt_dest->rt_ext_seq = 1; /* random value */
1115                 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1116                 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1117                 rt_dest->rt_metric = rt_gate->rt_metric;
1118                 rt_dest->rt_nhops = rt_gate->rt_nhops;
1119                 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1120                 MESH_RT_UNLOCK(ms);
1121                 /* XXX: lock?? */
1122                 mcopy = m_dup(m, M_NOWAIT);
1123                 for (; mcopy != NULL; mcopy = next) {
1124                         next = mcopy->m_nextpkt;
1125                         mcopy->m_nextpkt = NULL;
1126                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1127                             rt_dest->rt_dest,
1128                             "flush queued frame %p len %d", mcopy,
1129                             mcopy->m_pkthdr.len);
1130                         mesh_transmit_to_gate(vap, mcopy, rt_gate);
1131                 }
1132                 MESH_RT_LOCK(ms);
1133         }
1134         rt_dest->rt_flags = 0; /* Mark invalid */
1135         m_freem(m);
1136         MESH_RT_UNLOCK(ms);
1137 }
1138
1139 /*
1140  * Forward the specified frame.
1141  * Decrement the TTL and set TA to our MAC address.
1142  */
1143 static void
1144 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1145     const struct ieee80211_meshcntl *mc)
1146 {
1147         struct ieee80211com *ic = vap->iv_ic;
1148         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1149         struct ifnet *ifp = vap->iv_ifp;
1150         const struct ieee80211_frame *wh =
1151             mtod(m, const struct ieee80211_frame *);
1152         struct mbuf *mcopy;
1153         struct ieee80211_meshcntl *mccopy;
1154         struct ieee80211_frame *whcopy;
1155         struct ieee80211_node *ni;
1156         int err;
1157
1158         /* This is called from the RX path - don't hold this lock */
1159         IEEE80211_TX_UNLOCK_ASSERT(ic);
1160
1161         /*
1162          * mesh ttl of 1 means we are the last one receiving it,
1163          * according to amendment we decrement and then check if
1164          * 0, if so we dont forward.
1165          */
1166         if (mc->mc_ttl < 1) {
1167                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1168                     "%s", "frame not fwd'd, ttl 1");
1169                 vap->iv_stats.is_mesh_fwd_ttl++;
1170                 return;
1171         }
1172         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1173                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1174                     "%s", "frame not fwd'd, fwding disabled");
1175                 vap->iv_stats.is_mesh_fwd_disabled++;
1176                 return;
1177         }
1178         mcopy = m_dup(m, M_NOWAIT);
1179         if (mcopy == NULL) {
1180                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1181                     "%s", "frame not fwd'd, cannot dup");
1182                 vap->iv_stats.is_mesh_fwd_nobuf++;
1183                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1184                 return;
1185         }
1186         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1187             sizeof(struct ieee80211_meshcntl));
1188         if (mcopy == NULL) {
1189                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1190                     "%s", "frame not fwd'd, too short");
1191                 vap->iv_stats.is_mesh_fwd_tooshort++;
1192                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
1193                 m_freem(mcopy);
1194                 return;
1195         }
1196         whcopy = mtod(mcopy, struct ieee80211_frame *);
1197         mccopy = (struct ieee80211_meshcntl *)
1198             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1199         /* XXX clear other bits? */
1200         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1201         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1202         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1203                 ni = ieee80211_ref_node(vap->iv_bss);
1204                 mcopy->m_flags |= M_MCAST;
1205         } else {
1206                 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1207                 if (ni == NULL) {
1208                         /*
1209                          * [Optional] any of the following three actions:
1210                          * o silently discard
1211                          * o trigger a path discovery
1212                          * o inform TA that meshDA is unknown.
1213                          */
1214                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1215                             "%s", "frame not fwd'd, no path");
1216                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1217                             IEEE80211_REASON_MESH_PERR_NO_FI);
1218                         vap->iv_stats.is_mesh_fwd_nopath++;
1219                         m_freem(mcopy);
1220                         return;
1221                 }
1222                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1223         }
1224         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1225         mccopy->mc_ttl--;
1226
1227         /* XXX calculate priority so drivers can find the tx queue */
1228         M_WME_SETAC(mcopy, WME_AC_BE);
1229
1230         /* XXX do we know m_nextpkt is NULL? */
1231         MPASS((mcopy->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
1232         mcopy->m_pkthdr.rcvif = (void *) ni;
1233
1234         /*
1235          * XXX this bypasses all of the VAP TX handling; it passes frames
1236          * directly to the parent interface.
1237          *
1238          * Because of this, there's no TX lock being held as there's no
1239          * encaps state being used.
1240          *
1241          * Doing a direct parent transmit may not be the correct thing
1242          * to do here; we'll have to re-think this soon.
1243          */
1244         IEEE80211_TX_LOCK(ic);
1245         err = ieee80211_parent_xmitpkt(ic, mcopy);
1246         IEEE80211_TX_UNLOCK(ic);
1247         if (!err)
1248                 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
1249 }
1250
1251 static struct mbuf *
1252 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1253 {
1254 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1255 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1256         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1257                   sizeof(struct ieee80211_meshcntl_ae10)];
1258         const struct ieee80211_qosframe_addr4 *wh;
1259         const struct ieee80211_meshcntl_ae10 *mc;
1260         struct ether_header *eh;
1261         struct llc *llc;
1262         int ae;
1263
1264         if (m->m_len < hdrlen + sizeof(*llc) &&
1265             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1266                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1267                     "discard data frame: %s", "m_pullup failed");
1268                 vap->iv_stats.is_rx_tooshort++;
1269                 return NULL;
1270         }
1271         memcpy(b, mtod(m, caddr_t), hdrlen);
1272         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1273         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1274         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1275                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1276             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1277
1278         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1279         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1280             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1281             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1282             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1283             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1284               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1285                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1286                 llc = NULL;
1287         } else {
1288                 m_adj(m, hdrlen - sizeof(*eh));
1289         }
1290         eh = mtod(m, struct ether_header *);
1291         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1292         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1293                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1294                 if (ae == IEEE80211_MESH_AE_00) {
1295                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1296                 } else if (ae == IEEE80211_MESH_AE_01) {
1297                         IEEE80211_ADDR_COPY(eh->ether_shost,
1298                             MC01(mc)->mc_addr4);
1299                 } else {
1300                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1301                             (const struct ieee80211_frame *)wh, NULL,
1302                             "bad AE %d", ae);
1303                         vap->iv_stats.is_mesh_badae++;
1304                         m_freem(m);
1305                         return NULL;
1306                 }
1307         } else {
1308                 if (ae == IEEE80211_MESH_AE_00) {
1309                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1310                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1311                 } else if (ae == IEEE80211_MESH_AE_10) {
1312                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1313                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1314                 } else {
1315                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1316                             (const struct ieee80211_frame *)wh, NULL,
1317                             "bad AE %d", ae);
1318                         vap->iv_stats.is_mesh_badae++;
1319                         m_freem(m);
1320                         return NULL;
1321                 }
1322         }
1323 #ifndef __NO_STRICT_ALIGNMENT
1324         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1325                 m = ieee80211_realign(vap, m, sizeof(*eh));
1326                 if (m == NULL)
1327                         return NULL;
1328         }
1329 #endif /* !__NO_STRICT_ALIGNMENT */
1330         if (llc != NULL) {
1331                 eh = mtod(m, struct ether_header *);
1332                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1333         }
1334         return m;
1335 #undef  WDIR
1336 #undef  MC01
1337 }
1338
1339 /*
1340  * Return non-zero if the unicast mesh data frame should be processed
1341  * locally.  Frames that are not proxy'd have our address, otherwise
1342  * we need to consult the routing table to look for a proxy entry.
1343  */
1344 static __inline int
1345 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1346     const struct ieee80211_meshcntl *mc)
1347 {
1348         int ae = mc->mc_flags & 3;
1349
1350         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1351             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1352         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1353             ("bad AE %d", ae));
1354         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
1355                 const struct ieee80211_meshcntl_ae10 *mc10 =
1356                     (const struct ieee80211_meshcntl_ae10 *) mc;
1357                 struct ieee80211_mesh_route *rt =
1358                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1359                 /* check for proxy route to ourself */
1360                 return (rt != NULL &&
1361                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1362         } else                                  /* ucast w/o proxy */
1363                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1364 }
1365
1366 /*
1367  * Verifies transmitter, updates lifetime, precursor list and forwards data.
1368  * > 0 means we have forwarded data and no need to process locally
1369  * == 0 means we want to process locally (and we may have forwarded data
1370  * < 0 means there was an error and data should be discarded
1371  */
1372 static int
1373 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1374     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1375 {
1376         struct ieee80211_qosframe_addr4 *qwh;
1377         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1378         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1379
1380         /* This is called from the RX path - don't hold this lock */
1381         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1382
1383         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1384
1385         /*
1386          * TODO:
1387          * o verify addr2 is  a legitimate transmitter
1388          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1389          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1390          */
1391
1392         /* set lifetime of addr3 (meshDA) to initial value */
1393         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1394         if (rt_meshda == NULL) {
1395                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1396                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
1397                 /*
1398                  * [Optional] any of the following three actions:
1399                  * o silently discard                           [X]
1400                  * o trigger a path discovery                   [ ]
1401                  * o inform TA that meshDA is unknown.          [ ]
1402                  */
1403                 /* XXX: stats */
1404                 return (-1);
1405         }
1406
1407         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1408             ms->ms_ppath->mpp_inact));
1409
1410         /* set lifetime of addr4 (meshSA) to initial value */
1411         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1412         KASSERT(rt_meshsa != NULL, ("no route"));
1413         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1414             ms->ms_ppath->mpp_inact));
1415
1416         mesh_forward(vap, m, mc);
1417         return (1); /* dont process locally */
1418 }
1419
1420 /*
1421  * Verifies transmitter, updates lifetime, precursor list and process data
1422  * locally, if data is proxy with AE = 10 it could mean data should go
1423  * on another mesh path or data should be forwarded to the DS.
1424  *
1425  * > 0 means we have forwarded data and no need to process locally
1426  * == 0 means we want to process locally (and we may have forwarded data
1427  * < 0 means there was an error and data should be discarded
1428  */
1429 static int
1430 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1431     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1432 {
1433         struct ieee80211_qosframe_addr4 *qwh;
1434         const struct ieee80211_meshcntl_ae10 *mc10;
1435         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1436         struct ieee80211_mesh_route *rt;
1437         int ae;
1438
1439         /* This is called from the RX path - don't hold this lock */
1440         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1441
1442         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1443         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1444
1445         /*
1446          * TODO:
1447          * o verify addr2 is  a legitimate transmitter
1448          * o lifetime of precursor entry is max(init, curr)
1449          */
1450
1451         /* set lifetime of addr4 (meshSA) to initial value */
1452         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1453         KASSERT(rt != NULL, ("no route"));
1454         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1455         rt = NULL;
1456
1457         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1458         KASSERT(ae == IEEE80211_MESH_AE_00 ||
1459             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1460         if (ae == IEEE80211_MESH_AE_10) {
1461                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1462                         return (0); /* process locally */
1463                 }
1464
1465                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1466                 if (rt != NULL &&
1467                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1468                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1469                         /*
1470                          * Forward on another mesh-path, according to
1471                          * amendment as specified in 9.32.4.1
1472                          */
1473                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1474                         mesh_forward(vap, m,
1475                             (const struct ieee80211_meshcntl *)mc10);
1476                         return (1); /* dont process locally */
1477                 }
1478                 /*
1479                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
1480                  * addressed according to 13.11.3.2.
1481                  */
1482                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1483                     "forward frame to DS, SA(%6D) DA(%6D)",
1484                     mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1485         }
1486         return (0); /* process locally */
1487 }
1488
1489 /*
1490  * Try to forward the group addressed data on to other mesh STAs, and
1491  * also to the DS.
1492  *
1493  * > 0 means we have forwarded data and no need to process locally
1494  * == 0 means we want to process locally (and we may have forwarded data
1495  * < 0 means there was an error and data should be discarded
1496  */
1497 static int
1498 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1499     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1500 {
1501 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1502         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1503
1504         /* This is called from the RX path - don't hold this lock */
1505         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1506
1507         mesh_forward(vap, m, mc);
1508
1509         if(mc->mc_ttl > 0) {
1510                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1511                         /*
1512                          * Forward of MSDUs from the MBSS to DS group addressed
1513                          * (according to 13.11.3.2)
1514                          * This happens by delivering the packet, and a bridge
1515                          * will sent it on another port member.
1516                          */
1517                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1518                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD) {
1519                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1520                                     MC01(mc)->mc_addr4, "%s",
1521                                     "forward from MBSS to the DS");
1522                         }
1523                 }
1524         }
1525         return (0); /* process locally */
1526 #undef  MC01
1527 }
1528
1529 static int
1530 mesh_input(struct ieee80211_node *ni, struct mbuf *m,
1531     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1532 {
1533 #define HAS_SEQ(type)   ((type & 0x4) == 0)
1534 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1535         struct ieee80211vap *vap = ni->ni_vap;
1536         struct ieee80211com *ic = ni->ni_ic;
1537         struct ifnet *ifp = vap->iv_ifp;
1538         struct ieee80211_frame *wh;
1539         const struct ieee80211_meshcntl *mc;
1540         int hdrspace, meshdrlen, need_tap, error;
1541         uint8_t dir, type, subtype, ae;
1542         uint32_t seq;
1543         const uint8_t *addr;
1544         uint8_t qos[2];
1545
1546         KASSERT(ni != NULL, ("null node"));
1547         ni->ni_inact = ni->ni_inact_reload;
1548
1549         need_tap = 1;                   /* mbuf need to be tapped. */
1550         type = -1;                      /* undefined */
1551
1552         /* This is called from the RX path - don't hold this lock */
1553         IEEE80211_TX_UNLOCK_ASSERT(ic);
1554
1555         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1556                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1557                     ni->ni_macaddr, NULL,
1558                     "too short (1): len %u", m->m_pkthdr.len);
1559                 vap->iv_stats.is_rx_tooshort++;
1560                 goto out;
1561         }
1562         /*
1563          * Bit of a cheat here, we use a pointer for a 3-address
1564          * frame format but don't reference fields past outside
1565          * ieee80211_frame_min w/o first validating the data is
1566          * present.
1567         */
1568         wh = mtod(m, struct ieee80211_frame *);
1569
1570         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1571             IEEE80211_FC0_VERSION_0) {
1572                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1573                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1574                 vap->iv_stats.is_rx_badversion++;
1575                 goto err;
1576         }
1577         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1578         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1579         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1580         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1581                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1582                 ni->ni_noise = nf;
1583                 if (HAS_SEQ(type)) {
1584                         uint8_t tid = ieee80211_gettid(wh);
1585
1586                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
1587                             TID_TO_WME_AC(tid) >= WME_AC_VI)
1588                                 ic->ic_wme.wme_hipri_traffic++;
1589                         if (! ieee80211_check_rxseq(ni, wh, wh->i_addr1, rxs))
1590                                 goto out;
1591                 }
1592         }
1593 #ifdef IEEE80211_DEBUG
1594         /*
1595          * It's easier, but too expensive, to simulate different mesh
1596          * topologies by consulting the ACL policy very early, so do this
1597          * only under DEBUG.
1598          *
1599          * NB: this check is also done upon peering link initiation.
1600          */
1601         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1602                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1603                     wh, NULL, "%s", "disallowed by ACL");
1604                 vap->iv_stats.is_rx_acl++;
1605                 goto out;
1606         }
1607 #endif
1608         switch (type) {
1609         case IEEE80211_FC0_TYPE_DATA:
1610                 if (ni == vap->iv_bss)
1611                         goto out;
1612                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1613                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1614                             ni->ni_macaddr, NULL,
1615                             "peer link not yet established (%d)",
1616                             ni->ni_mlstate);
1617                         vap->iv_stats.is_mesh_nolink++;
1618                         goto out;
1619                 }
1620                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1621                     dir != IEEE80211_FC1_DIR_DSTODS) {
1622                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1623                             wh, "data", "incorrect dir 0x%x", dir);
1624                         vap->iv_stats.is_rx_wrongdir++;
1625                         goto err;
1626                 }
1627
1628                 /* All Mesh data frames are QoS subtype */
1629                 if (!HAS_SEQ(type)) {
1630                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1631                             wh, "data", "incorrect subtype 0x%x", subtype);
1632                         vap->iv_stats.is_rx_badsubtype++;
1633                         goto err;
1634                 }
1635
1636                 /*
1637                  * Next up, any fragmentation.
1638                  * XXX: we defrag before we even try to forward,
1639                  * Mesh Control field is not present in sub-sequent
1640                  * fragmented frames. This is in contrast to Draft 4.0.
1641                  */
1642                 hdrspace = ieee80211_hdrspace(ic, wh);
1643                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1644                         m = ieee80211_defrag(ni, m, hdrspace, 0);
1645                         if (m == NULL) {
1646                                 /* Fragment dropped or frame not complete yet */
1647                                 goto out;
1648                         }
1649                 }
1650                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1651
1652                 /*
1653                  * Now we have a complete Mesh Data frame.
1654                  */
1655
1656                 /*
1657                  * Only fromDStoDS data frames use 4 address qos frames
1658                  * as specified in amendment. Otherwise addr4 is located
1659                  * in the Mesh Control field and a 3 address qos frame
1660                  * is used.
1661                  */
1662                 *(uint16_t *)qos = *(uint16_t *)ieee80211_getqos(wh);
1663
1664                 /*
1665                  * NB: The mesh STA sets the Mesh Control Present
1666                  * subfield to 1 in the Mesh Data frame containing
1667                  * an unfragmented MSDU, an A-MSDU, or the first
1668                  * fragment of an MSDU.
1669                  * After defrag it should always be present.
1670                  */
1671                 if (!(qos[1] & IEEE80211_QOS_MC)) {
1672                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1673                             ni->ni_macaddr, NULL,
1674                             "%s", "Mesh control field not present");
1675                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1676                         goto err;
1677                 }
1678
1679                 /* pull up enough to get to the mesh control */
1680                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1681                     (m = m_pullup(m, hdrspace +
1682                         sizeof(struct ieee80211_meshcntl))) == NULL) {
1683                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1684                             ni->ni_macaddr, NULL,
1685                             "data too short: expecting %u", hdrspace);
1686                         vap->iv_stats.is_rx_tooshort++;
1687                         goto out;               /* XXX */
1688                 }
1689                 /*
1690                  * Now calculate the full extent of the headers. Note
1691                  * mesh_decap will pull up anything we didn't get
1692                  * above when it strips the 802.11 headers.
1693                  */
1694                 mc = (const struct ieee80211_meshcntl *)
1695                     (mtod(m, const uint8_t *) + hdrspace);
1696                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1697                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1698                     ae * IEEE80211_ADDR_LEN;
1699                 hdrspace += meshdrlen;
1700
1701                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1702                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1703                     (m->m_len < hdrspace) &&
1704                     ((m = m_pullup(m, hdrspace)) == NULL)) {
1705                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1706                             ni->ni_macaddr, NULL,
1707                             "data too short: expecting %u", hdrspace);
1708                         vap->iv_stats.is_rx_tooshort++;
1709                         goto out;               /* XXX */
1710                 }
1711                 /* XXX: are we sure there is no reallocating after m_pullup? */
1712
1713                 seq = le32dec(mc->mc_seq);
1714                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1715                         addr = wh->i_addr3;
1716                 else if (ae == IEEE80211_MESH_AE_01)
1717                         addr = MC01(mc)->mc_addr4;
1718                 else
1719                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1720                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1721                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1722                             addr, "data", "%s", "not to me");
1723                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1724                         goto out;
1725                 }
1726                 if (mesh_checkpseq(vap, addr, seq) != 0) {
1727                         vap->iv_stats.is_rx_dup++;
1728                         goto out;
1729                 }
1730
1731                 /* This code "routes" the frame to the right control path */
1732                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1733                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1734                                 error =
1735                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1736                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1737                                 error = mesh_recv_group_data(vap, m, wh, mc);
1738                         else
1739                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1740                                     wh, mc);
1741                 } else
1742                         error = mesh_recv_group_data(vap, m, wh, mc);
1743                 if (error < 0)
1744                         goto err;
1745                 else if (error > 0)
1746                         goto out;
1747
1748                 if (ieee80211_radiotap_active_vap(vap))
1749                         ieee80211_radiotap_rx(vap, m);
1750                 need_tap = 0;
1751
1752                 /*
1753                  * Finally, strip the 802.11 header.
1754                  */
1755                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1756                 if (m == NULL) {
1757                         /* XXX mask bit to check for both */
1758                         /* don't count Null data frames as errors */
1759                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1760                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1761                                 goto out;
1762                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1763                             ni->ni_macaddr, "data", "%s", "decap error");
1764                         vap->iv_stats.is_rx_decap++;
1765                         IEEE80211_NODE_STAT(ni, rx_decap);
1766                         goto err;
1767                 }
1768                 if (qos[0] & IEEE80211_QOS_AMSDU) {
1769                         m = ieee80211_decap_amsdu(ni, m);
1770                         if (m == NULL)
1771                                 return IEEE80211_FC0_TYPE_DATA;
1772                 }
1773                 ieee80211_deliver_data(vap, ni, m);
1774                 return type;
1775         case IEEE80211_FC0_TYPE_MGT:
1776                 vap->iv_stats.is_rx_mgmt++;
1777                 IEEE80211_NODE_STAT(ni, rx_mgmt);
1778                 if (dir != IEEE80211_FC1_DIR_NODS) {
1779                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1780                             wh, "mgt", "incorrect dir 0x%x", dir);
1781                         vap->iv_stats.is_rx_wrongdir++;
1782                         goto err;
1783                 }
1784                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1785                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1786                             ni->ni_macaddr, "mgt", "too short: len %u",
1787                             m->m_pkthdr.len);
1788                         vap->iv_stats.is_rx_tooshort++;
1789                         goto out;
1790                 }
1791 #ifdef IEEE80211_DEBUG
1792                 if ((ieee80211_msg_debug(vap) &&
1793                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1794                     ieee80211_msg_dumppkts(vap)) {
1795                         if_printf(ifp, "received %s from %s rssi %d\n",
1796                             ieee80211_mgt_subtype_name(subtype),
1797                             ether_sprintf(wh->i_addr2), rssi);
1798                 }
1799 #endif
1800                 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1801                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1802                             wh, NULL, "%s", "WEP set but not permitted");
1803                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1804                         goto out;
1805                 }
1806                 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
1807                 goto out;
1808         case IEEE80211_FC0_TYPE_CTL:
1809                 vap->iv_stats.is_rx_ctl++;
1810                 IEEE80211_NODE_STAT(ni, rx_ctrl);
1811                 goto out;
1812         default:
1813                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1814                     wh, "bad", "frame type 0x%x", type);
1815                 /* should not come here */
1816                 break;
1817         }
1818 err:
1819         if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
1820 out:
1821         if (m != NULL) {
1822                 if (need_tap && ieee80211_radiotap_active_vap(vap))
1823                         ieee80211_radiotap_rx(vap, m);
1824                 m_freem(m);
1825         }
1826         return type;
1827 #undef  HAS_SEQ
1828 #undef  MC01
1829 }
1830
1831 static void
1832 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1833     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1834 {
1835         struct ieee80211vap *vap = ni->ni_vap;
1836         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1837         struct ieee80211com *ic = ni->ni_ic;
1838         struct ieee80211_channel *rxchan = ic->ic_curchan;
1839         struct ieee80211_frame *wh;
1840         struct ieee80211_mesh_route *rt;
1841         uint8_t *frm, *efrm;
1842
1843         wh = mtod(m0, struct ieee80211_frame *);
1844         frm = (uint8_t *)&wh[1];
1845         efrm = mtod(m0, uint8_t *) + m0->m_len;
1846         switch (subtype) {
1847         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1848         case IEEE80211_FC0_SUBTYPE_BEACON:
1849         {
1850                 struct ieee80211_scanparams scan;
1851                 struct ieee80211_channel *c;
1852                 /*
1853                  * We process beacon/probe response
1854                  * frames to discover neighbors.
1855                  */
1856                 if (rxs != NULL) {
1857                         c = ieee80211_lookup_channel_rxstatus(vap, rxs);
1858                         if (c != NULL)
1859                                 rxchan = c;
1860                 }
1861                 if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0)
1862                         return;
1863                 /*
1864                  * Count frame now that we know it's to be processed.
1865                  */
1866                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1867                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
1868                         IEEE80211_NODE_STAT(ni, rx_beacons);
1869                 } else
1870                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1871                 /*
1872                  * If scanning, just pass information to the scan module.
1873                  */
1874                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1875                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1876                                 /*
1877                                  * Actively scanning a channel marked passive;
1878                                  * send a probe request now that we know there
1879                                  * is 802.11 traffic present.
1880                                  *
1881                                  * XXX check if the beacon we recv'd gives
1882                                  * us what we need and suppress the probe req
1883                                  */
1884                                 ieee80211_probe_curchan(vap, 1);
1885                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1886                         }
1887                         ieee80211_add_scan(vap, rxchan, &scan, wh,
1888                             subtype, rssi, nf);
1889                         return;
1890                 }
1891
1892                 /* The rest of this code assumes we are running */
1893                 if (vap->iv_state != IEEE80211_S_RUN)
1894                         return;
1895                 /*
1896                  * Ignore non-mesh STAs.
1897                  */
1898                 if ((scan.capinfo &
1899                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1900                     scan.meshid == NULL || scan.meshconf == NULL) {
1901                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1902                             wh, "beacon", "%s", "not a mesh sta");
1903                         vap->iv_stats.is_mesh_wrongmesh++;
1904                         return;
1905                 }
1906                 /*
1907                  * Ignore STAs for other mesh networks.
1908                  */
1909                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1910                     mesh_verify_meshconf(vap, scan.meshconf)) {
1911                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1912                             wh, "beacon", "%s", "not for our mesh");
1913                         vap->iv_stats.is_mesh_wrongmesh++;
1914                         return;
1915                 }
1916                 /*
1917                  * Peer only based on the current ACL policy.
1918                  */
1919                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1920                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1921                             wh, NULL, "%s", "disallowed by ACL");
1922                         vap->iv_stats.is_rx_acl++;
1923                         return;
1924                 }
1925                 /*
1926                  * Do neighbor discovery.
1927                  */
1928                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1929                         /*
1930                          * Create a new entry in the neighbor table.
1931                          */
1932                         ni = ieee80211_add_neighbor(vap, wh, &scan);
1933                 }
1934                 /*
1935                  * Automatically peer with discovered nodes if possible.
1936                  */
1937                 if (ni != vap->iv_bss &&
1938                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1939                         switch (ni->ni_mlstate) {
1940                         case IEEE80211_NODE_MESH_IDLE:
1941                         {
1942                                 uint16_t args[1];
1943
1944                                 /* Wait for backoff callout to reset counter */
1945                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1946                                         return;
1947
1948                                 ni->ni_mlpid = mesh_generateid(vap);
1949                                 if (ni->ni_mlpid == 0)
1950                                         return;
1951                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1952                                 args[0] = ni->ni_mlpid;
1953                                 ieee80211_send_action(ni,
1954                                 IEEE80211_ACTION_CAT_SELF_PROT,
1955                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1956                                 ni->ni_mlrcnt = 0;
1957                                 mesh_peer_timeout_setup(ni);
1958                                 break;
1959                         }
1960                         case IEEE80211_NODE_MESH_ESTABLISHED:
1961                         {
1962                                 /*
1963                                  * Valid beacon from a peer mesh STA
1964                                  * bump TA lifetime
1965                                  */
1966                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1967                                 if(rt != NULL) {
1968                                         ieee80211_mesh_rt_update(rt,
1969                                             ticks_to_msecs(
1970                                             ms->ms_ppath->mpp_inact));
1971                                 }
1972                                 break;
1973                         }
1974                         default:
1975                                 break; /* ignore */
1976                         }
1977                 }
1978                 break;
1979         }
1980         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1981         {
1982                 uint8_t *ssid, *meshid, *rates, *xrates;
1983
1984                 if (vap->iv_state != IEEE80211_S_RUN) {
1985                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1986                             wh, NULL, "wrong state %s",
1987                             ieee80211_state_name[vap->iv_state]);
1988                         vap->iv_stats.is_rx_mgtdiscard++;
1989                         return;
1990                 }
1991                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
1992                         /* frame must be directed */
1993                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1994                             wh, NULL, "%s", "not unicast");
1995                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
1996                         return;
1997                 }
1998                 /*
1999                  * prreq frame format
2000                  *      [tlv] ssid
2001                  *      [tlv] supported rates
2002                  *      [tlv] extended supported rates
2003                  *      [tlv] mesh id
2004                  */
2005                 ssid = meshid = rates = xrates = NULL;
2006                 while (efrm - frm > 1) {
2007                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2008                         switch (*frm) {
2009                         case IEEE80211_ELEMID_SSID:
2010                                 ssid = frm;
2011                                 break;
2012                         case IEEE80211_ELEMID_RATES:
2013                                 rates = frm;
2014                                 break;
2015                         case IEEE80211_ELEMID_XRATES:
2016                                 xrates = frm;
2017                                 break;
2018                         case IEEE80211_ELEMID_MESHID:
2019                                 meshid = frm;
2020                                 break;
2021                         }
2022                         frm += frm[1] + 2;
2023                 }
2024                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2025                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2026                 if (xrates != NULL)
2027                         IEEE80211_VERIFY_ELEMENT(xrates,
2028                             IEEE80211_RATE_MAXSIZE - rates[1], return);
2029                 if (meshid != NULL) {
2030                         IEEE80211_VERIFY_ELEMENT(meshid,
2031                             IEEE80211_MESHID_LEN, return);
2032                         /* NB: meshid, not ssid */
2033                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2034                 }
2035
2036                 /* XXX find a better class or define it's own */
2037                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2038                     "%s", "recv probe req");
2039                 /*
2040                  * Some legacy 11b clients cannot hack a complete
2041                  * probe response frame.  When the request includes
2042                  * only a bare-bones rate set, communicate this to
2043                  * the transmit side.
2044                  */
2045                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2046                 break;
2047         }
2048
2049         case IEEE80211_FC0_SUBTYPE_ACTION:
2050         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2051                 if (ni == vap->iv_bss) {
2052                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2053                             wh, NULL, "%s", "unknown node");
2054                         vap->iv_stats.is_rx_mgtdiscard++;
2055                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2056                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2057                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2058                             wh, NULL, "%s", "not for us");
2059                         vap->iv_stats.is_rx_mgtdiscard++;
2060                 } else if (vap->iv_state != IEEE80211_S_RUN) {
2061                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2062                             wh, NULL, "wrong state %s",
2063                             ieee80211_state_name[vap->iv_state]);
2064                         vap->iv_stats.is_rx_mgtdiscard++;
2065                 } else {
2066                         if (ieee80211_parse_action(ni, m0) == 0)
2067                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2068                 }
2069                 break;
2070
2071         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2072         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2073         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2074         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2075         case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2076         case IEEE80211_FC0_SUBTYPE_ATIM:
2077         case IEEE80211_FC0_SUBTYPE_DISASSOC:
2078         case IEEE80211_FC0_SUBTYPE_AUTH:
2079         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2080                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2081                     wh, NULL, "%s", "not handled");
2082                 vap->iv_stats.is_rx_mgtdiscard++;
2083                 break;
2084
2085         default:
2086                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2087                     wh, "mgt", "subtype 0x%x not handled", subtype);
2088                 vap->iv_stats.is_rx_badsubtype++;
2089                 break;
2090         }
2091 }
2092
2093 static void
2094 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2095 {
2096
2097         switch (subtype) {
2098         case IEEE80211_FC0_SUBTYPE_BAR:
2099                 ieee80211_recv_bar(ni, m);
2100                 break;
2101         }
2102 }
2103
2104 /*
2105  * Parse meshpeering action ie's for MPM frames
2106  */
2107 static const struct ieee80211_meshpeer_ie *
2108 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2109         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
2110         const uint8_t *frm, const uint8_t *efrm,
2111         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2112 {
2113         struct ieee80211vap *vap = ni->ni_vap;
2114         const struct ieee80211_meshpeer_ie *mpie;
2115         uint16_t args[3];
2116         const uint8_t *meshid, *meshconf;
2117         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2118
2119         meshid = meshconf = NULL;
2120         while (efrm - frm > 1) {
2121                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2122                 switch (*frm) {
2123                 case IEEE80211_ELEMID_MESHID:
2124                         meshid = frm;
2125                         break;
2126                 case IEEE80211_ELEMID_MESHCONF:
2127                         meshconf = frm;
2128                         break;
2129                 case IEEE80211_ELEMID_MESHPEER:
2130                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
2131                         memset(mp, 0, sizeof(*mp));
2132                         mp->peer_len = mpie->peer_len;
2133                         mp->peer_proto = le16dec(&mpie->peer_proto);
2134                         mp->peer_llinkid = le16dec(&mpie->peer_llinkid);
2135                         switch (subtype) {
2136                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2137                                 mp->peer_linkid =
2138                                     le16dec(&mpie->peer_linkid);
2139                                 break;
2140                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
2141                                 /* NB: peer link ID is optional */
2142                                 if (mpie->peer_len ==
2143                                     (IEEE80211_MPM_BASE_SZ + 2)) {
2144                                         mp->peer_linkid = 0;
2145                                         mp->peer_rcode =
2146                                             le16dec(&mpie->peer_linkid);
2147                                 } else {
2148                                         mp->peer_linkid =
2149                                             le16dec(&mpie->peer_linkid);
2150                                         mp->peer_rcode =
2151                                             le16dec(&mpie->peer_rcode);
2152                                 }
2153                                 break;
2154                         }
2155                         break;
2156                 }
2157                 frm += frm[1] + 2;
2158         }
2159
2160         /*
2161          * Verify the contents of the frame.
2162          * If it fails validation, close the peer link.
2163          */
2164         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2165                 sendclose = 1;
2166                 IEEE80211_DISCARD(vap,
2167                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2168                     wh, NULL, "%s", "MPM validation failed");
2169         }
2170
2171         /* If meshid is not the same reject any frames type. */
2172         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2173                 sendclose = 1;
2174                 IEEE80211_DISCARD(vap,
2175                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2176                     wh, NULL, "%s", "not for our mesh");
2177                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2178                         /*
2179                          * Standard not clear about this, if we dont ignore
2180                          * there will be an endless loop between nodes sending
2181                          * CLOSE frames between each other with wrong meshid.
2182                          * Discard and timers will bring FSM to IDLE state.
2183                          */
2184                         return NULL;
2185                 }
2186         }
2187
2188         /*
2189          * Close frames are accepted if meshid is the same.
2190          * Verify the other two types.
2191          */
2192         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2193             mesh_verify_meshconf(vap, meshconf)) {
2194                 sendclose = 1;
2195                 IEEE80211_DISCARD(vap,
2196                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2197                     wh, NULL, "%s", "configuration missmatch");
2198         }
2199
2200         if (sendclose) {
2201                 vap->iv_stats.is_rx_mgtdiscard++;
2202                 switch (ni->ni_mlstate) {
2203                 case IEEE80211_NODE_MESH_IDLE:
2204                 case IEEE80211_NODE_MESH_ESTABLISHED:
2205                 case IEEE80211_NODE_MESH_HOLDING:
2206                         /* ignore */
2207                         break;
2208                 case IEEE80211_NODE_MESH_OPENSNT:
2209                 case IEEE80211_NODE_MESH_OPENRCV:
2210                 case IEEE80211_NODE_MESH_CONFIRMRCV:
2211                         args[0] = ni->ni_mlpid;
2212                         args[1] = ni->ni_mllid;
2213                         /* Reason codes for rejection */
2214                         switch (subtype) {
2215                         case IEEE80211_ACTION_MESHPEERING_OPEN:
2216                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2217                                 break;
2218                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2219                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2220                                 break;
2221                         }
2222                         ieee80211_send_action(ni,
2223                             IEEE80211_ACTION_CAT_SELF_PROT,
2224                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2225                             args);
2226                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2227                         mesh_peer_timeout_setup(ni);
2228                         break;
2229                 }
2230                 return NULL;
2231         }
2232
2233         return (const struct ieee80211_meshpeer_ie *) mp;
2234 }
2235
2236 static int
2237 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2238         const struct ieee80211_frame *wh,
2239         const uint8_t *frm, const uint8_t *efrm)
2240 {
2241         struct ieee80211vap *vap = ni->ni_vap;
2242         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2243         struct ieee80211_meshpeer_ie ie;
2244         const struct ieee80211_meshpeer_ie *meshpeer;
2245         uint16_t args[3];
2246
2247         /* +2+2 for action + code + capabilites */
2248         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2249             IEEE80211_ACTION_MESHPEERING_OPEN);
2250         if (meshpeer == NULL) {
2251                 return 0;
2252         }
2253
2254         /* XXX move up */
2255         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2256             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2257
2258         switch (ni->ni_mlstate) {
2259         case IEEE80211_NODE_MESH_IDLE:
2260                 /* Reject open request if reached our maximum neighbor count */
2261                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2262                         args[0] = meshpeer->peer_llinkid;
2263                         args[1] = 0;
2264                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2265                         ieee80211_send_action(ni,
2266                             IEEE80211_ACTION_CAT_SELF_PROT,
2267                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2268                             args);
2269                         /* stay in IDLE state */
2270                         return (0);
2271                 }
2272                 /* Open frame accepted */
2273                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2274                 ni->ni_mllid = meshpeer->peer_llinkid;
2275                 ni->ni_mlpid = mesh_generateid(vap);
2276                 if (ni->ni_mlpid == 0)
2277                         return 0;               /* XXX */
2278                 args[0] = ni->ni_mlpid;
2279                 /* Announce we're open too... */
2280                 ieee80211_send_action(ni,
2281                     IEEE80211_ACTION_CAT_SELF_PROT,
2282                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
2283                 /* ...and confirm the link. */
2284                 args[0] = ni->ni_mlpid;
2285                 args[1] = ni->ni_mllid;
2286                 ieee80211_send_action(ni,
2287                     IEEE80211_ACTION_CAT_SELF_PROT,
2288                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2289                     args);
2290                 mesh_peer_timeout_setup(ni);
2291                 break;
2292         case IEEE80211_NODE_MESH_OPENRCV:
2293                 /* Wrong Link ID */
2294                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2295                         args[0] = ni->ni_mllid;
2296                         args[1] = ni->ni_mlpid;
2297                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2298                         ieee80211_send_action(ni,
2299                             IEEE80211_ACTION_CAT_SELF_PROT,
2300                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2301                             args);
2302                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2303                         mesh_peer_timeout_setup(ni);
2304                         break;
2305                 }
2306                 /* Duplicate open, confirm again. */
2307                 args[0] = ni->ni_mlpid;
2308                 args[1] = ni->ni_mllid;
2309                 ieee80211_send_action(ni,
2310                     IEEE80211_ACTION_CAT_SELF_PROT,
2311                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2312                     args);
2313                 break;
2314         case IEEE80211_NODE_MESH_OPENSNT:
2315                 ni->ni_mllid = meshpeer->peer_llinkid;
2316                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2317                 args[0] = ni->ni_mlpid;
2318                 args[1] = ni->ni_mllid;
2319                 ieee80211_send_action(ni,
2320                     IEEE80211_ACTION_CAT_SELF_PROT,
2321                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2322                     args);
2323                 /* NB: don't setup/clear any timeout */
2324                 break;
2325         case IEEE80211_NODE_MESH_CONFIRMRCV:
2326                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2327                     ni->ni_mllid != meshpeer->peer_llinkid) {
2328                         args[0] = ni->ni_mlpid;
2329                         args[1] = ni->ni_mllid;
2330                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2331                         ieee80211_send_action(ni,
2332                             IEEE80211_ACTION_CAT_SELF_PROT,
2333                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2334                             args);
2335                         mesh_linkchange(ni,
2336                             IEEE80211_NODE_MESH_HOLDING);
2337                         mesh_peer_timeout_setup(ni);
2338                         break;
2339                 }
2340                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2341                 ni->ni_mllid = meshpeer->peer_llinkid;
2342                 args[0] = ni->ni_mlpid;
2343                 args[1] = ni->ni_mllid;
2344                 ieee80211_send_action(ni,
2345                     IEEE80211_ACTION_CAT_SELF_PROT,
2346                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2347                     args);
2348                 mesh_peer_timeout_stop(ni);
2349                 break;
2350         case IEEE80211_NODE_MESH_ESTABLISHED:
2351                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2352                         args[0] = ni->ni_mllid;
2353                         args[1] = ni->ni_mlpid;
2354                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2355                         ieee80211_send_action(ni,
2356                             IEEE80211_ACTION_CAT_SELF_PROT,
2357                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2358                             args);
2359                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2360                         mesh_peer_timeout_setup(ni);
2361                         break;
2362                 }
2363                 args[0] = ni->ni_mlpid;
2364                 args[1] = ni->ni_mllid;
2365                 ieee80211_send_action(ni,
2366                     IEEE80211_ACTION_CAT_SELF_PROT,
2367                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2368                     args);
2369                 break;
2370         case IEEE80211_NODE_MESH_HOLDING:
2371                 args[0] = ni->ni_mlpid;
2372                 args[1] = meshpeer->peer_llinkid;
2373                 /* Standard not clear about what the reaason code should be */
2374                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2375                 ieee80211_send_action(ni,
2376                     IEEE80211_ACTION_CAT_SELF_PROT,
2377                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2378                     args);
2379                 break;
2380         }
2381         return 0;
2382 }
2383
2384 static int
2385 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2386         const struct ieee80211_frame *wh,
2387         const uint8_t *frm, const uint8_t *efrm)
2388 {
2389         struct ieee80211vap *vap = ni->ni_vap;
2390         struct ieee80211_meshpeer_ie ie;
2391         const struct ieee80211_meshpeer_ie *meshpeer;
2392         uint16_t args[3];
2393
2394         /* +2+2+2+2 for action + code + capabilites + status code + AID */
2395         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2396             IEEE80211_ACTION_MESHPEERING_CONFIRM);
2397         if (meshpeer == NULL) {
2398                 return 0;
2399         }
2400
2401         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2402             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2403             meshpeer->peer_llinkid, meshpeer->peer_linkid);
2404
2405         switch (ni->ni_mlstate) {
2406         case IEEE80211_NODE_MESH_OPENRCV:
2407                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2408                 mesh_peer_timeout_stop(ni);
2409                 break;
2410         case IEEE80211_NODE_MESH_OPENSNT:
2411                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2412                 mesh_peer_timeout_setup(ni);
2413                 break;
2414         case IEEE80211_NODE_MESH_HOLDING:
2415                 args[0] = ni->ni_mlpid;
2416                 args[1] = meshpeer->peer_llinkid;
2417                 /* Standard not clear about what the reaason code should be */
2418                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2419                 ieee80211_send_action(ni,
2420                     IEEE80211_ACTION_CAT_SELF_PROT,
2421                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2422                     args);
2423                 break;
2424         case IEEE80211_NODE_MESH_CONFIRMRCV:
2425                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2426                         args[0] = ni->ni_mlpid;
2427                         args[1] = ni->ni_mllid;
2428                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2429                         ieee80211_send_action(ni,
2430                             IEEE80211_ACTION_CAT_SELF_PROT,
2431                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2432                             args);
2433                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2434                         mesh_peer_timeout_setup(ni);
2435                 }
2436                 break;
2437         default:
2438                 IEEE80211_DISCARD(vap,
2439                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2440                     wh, NULL, "received confirm in invalid state %d",
2441                     ni->ni_mlstate);
2442                 vap->iv_stats.is_rx_mgtdiscard++;
2443                 break;
2444         }
2445         return 0;
2446 }
2447
2448 static int
2449 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2450         const struct ieee80211_frame *wh,
2451         const uint8_t *frm, const uint8_t *efrm)
2452 {
2453         struct ieee80211_meshpeer_ie ie;
2454         const struct ieee80211_meshpeer_ie *meshpeer;
2455         uint16_t args[3];
2456
2457         /* +2 for action + code */
2458         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2459             IEEE80211_ACTION_MESHPEERING_CLOSE);
2460         if (meshpeer == NULL) {
2461                 return 0;
2462         }
2463
2464         /*
2465          * XXX: check reason code, for example we could receive
2466          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2467          * to peer again.
2468          */
2469
2470         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2471             ni, "%s", "recv PEER CLOSE");
2472
2473         switch (ni->ni_mlstate) {
2474         case IEEE80211_NODE_MESH_IDLE:
2475                 /* ignore */
2476                 break;
2477         case IEEE80211_NODE_MESH_OPENRCV:
2478         case IEEE80211_NODE_MESH_OPENSNT:
2479         case IEEE80211_NODE_MESH_CONFIRMRCV:
2480         case IEEE80211_NODE_MESH_ESTABLISHED:
2481                 args[0] = ni->ni_mlpid;
2482                 args[1] = ni->ni_mllid;
2483                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2484                 ieee80211_send_action(ni,
2485                     IEEE80211_ACTION_CAT_SELF_PROT,
2486                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2487                     args);
2488                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2489                 mesh_peer_timeout_setup(ni);
2490                 break;
2491         case IEEE80211_NODE_MESH_HOLDING:
2492                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2493                 mesh_peer_timeout_stop(ni);
2494                 break;
2495         }
2496         return 0;
2497 }
2498
2499 /*
2500  * Link Metric handling.
2501  */
2502 static int
2503 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2504         const struct ieee80211_frame *wh,
2505         const uint8_t *frm, const uint8_t *efrm)
2506 {
2507         const struct ieee80211_meshlmetric_ie *ie =
2508             (const struct ieee80211_meshlmetric_ie *)
2509             (frm+2); /* action + code */
2510         struct ieee80211_meshlmetric_ie lm_rep;
2511
2512         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2513                 lm_rep.lm_flags = 0;
2514                 lm_rep.lm_metric = mesh_airtime_calc(ni);
2515                 ieee80211_send_action(ni,
2516                     IEEE80211_ACTION_CAT_MESH,
2517                     IEEE80211_ACTION_MESH_LMETRIC,
2518                     &lm_rep);
2519         }
2520         /* XXX: else do nothing for now */
2521         return 0;
2522 }
2523
2524 /*
2525  * Parse meshgate action ie's for GANN frames.
2526  * Returns -1 if parsing fails, otherwise 0.
2527  */
2528 static int
2529 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2530     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
2531     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2532 {
2533         struct ieee80211vap *vap = ni->ni_vap;
2534         const struct ieee80211_meshgann_ie *gannie;
2535
2536         while (efrm - frm > 1) {
2537                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2538                 switch (*frm) {
2539                 case IEEE80211_ELEMID_MESHGANN:
2540                         gannie = (const struct ieee80211_meshgann_ie *) frm;
2541                         memset(ie, 0, sizeof(*ie));
2542                         ie->gann_ie = gannie->gann_ie;
2543                         ie->gann_len = gannie->gann_len;
2544                         ie->gann_flags = gannie->gann_flags;
2545                         ie->gann_hopcount = gannie->gann_hopcount;
2546                         ie->gann_ttl = gannie->gann_ttl;
2547                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2548                         ie->gann_seq = le32dec(&gannie->gann_seq);
2549                         ie->gann_interval = le16dec(&gannie->gann_interval);
2550                         break;
2551                 }
2552                 frm += frm[1] + 2;
2553         }
2554
2555         return 0;
2556 }
2557
2558 /*
2559  * Mesh Gate Announcement handling.
2560  */
2561 static int
2562 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2563         const struct ieee80211_frame *wh,
2564         const uint8_t *frm, const uint8_t *efrm)
2565 {
2566         struct ieee80211vap *vap = ni->ni_vap;
2567         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2568         struct ieee80211_mesh_gate_route *gr, *next;
2569         struct ieee80211_mesh_route *rt_gate;
2570         struct ieee80211_meshgann_ie pgann;
2571         struct ieee80211_meshgann_ie ie;
2572         int found = 0;
2573
2574         /* +2 for action + code */
2575         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2576                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2577                     ni->ni_macaddr, NULL, "%s",
2578                     "GANN parsing failed");
2579                 vap->iv_stats.is_rx_mgtdiscard++;
2580                 return (0);
2581         }
2582
2583         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2584                 return 0;
2585
2586         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2587             "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2588             ie.gann_seq);
2589
2590         if (ms == NULL)
2591                 return (0);
2592         MESH_RT_LOCK(ms);
2593         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2594                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2595                         continue;
2596                 if (ie.gann_seq <= gr->gr_lastseq) {
2597                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2598                             ni->ni_macaddr, NULL,
2599                             "GANN old seqno %u <= %u",
2600                             ie.gann_seq, gr->gr_lastseq);
2601                         MESH_RT_UNLOCK(ms);
2602                         return (0);
2603                 }
2604                 /* corresponding mesh gate found & GANN accepted */
2605                 found = 1;
2606                 break;
2607         }
2608         if (found == 0) {
2609                 /* this GANN is from a new mesh Gate add it to known table. */
2610                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2611                     "stored new GANN information, seq %u.", ie.gann_seq);
2612                 gr = IEEE80211_MALLOC(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2613                     M_80211_MESH_GT_RT,
2614                     IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
2615                 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2616                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2617         }
2618         gr->gr_lastseq = ie.gann_seq;
2619
2620         /* check if we have a path to this gate */
2621         rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2622         if (rt_gate != NULL &&
2623             rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2624                 gr->gr_route = rt_gate;
2625                 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2626         }
2627
2628         MESH_RT_UNLOCK(ms);
2629
2630         /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2631         if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2632                 return 0;
2633         pgann.gann_flags = ie.gann_flags; /* Reserved */
2634         pgann.gann_hopcount = ie.gann_hopcount + 1;
2635         pgann.gann_ttl = ie.gann_ttl - 1;
2636         IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2637         pgann.gann_seq = ie.gann_seq;
2638         pgann.gann_interval = ie.gann_interval;
2639
2640         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2641             "%s", "propagate GANN");
2642
2643         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2644             IEEE80211_ACTION_MESH_GANN, &pgann);
2645
2646         return 0;
2647 }
2648
2649 static int
2650 mesh_send_action(struct ieee80211_node *ni,
2651     const uint8_t sa[IEEE80211_ADDR_LEN],
2652     const uint8_t da[IEEE80211_ADDR_LEN],
2653     struct mbuf *m)
2654 {
2655         struct ieee80211vap *vap = ni->ni_vap;
2656         struct ieee80211com *ic = ni->ni_ic;
2657         struct ieee80211_bpf_params params;
2658         int ret;
2659
2660         KASSERT(ni != NULL, ("null node"));
2661
2662         if (vap->iv_state == IEEE80211_S_CAC) {
2663                 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2664                     "block %s frame in CAC state", "Mesh action");
2665                 vap->iv_stats.is_tx_badstate++;
2666                 ieee80211_free_node(ni);
2667                 m_freem(m);
2668                 return EIO;             /* XXX */
2669         }
2670
2671         M_PREPEND(m, sizeof(struct ieee80211_frame), M_NOWAIT);
2672         if (m == NULL) {
2673                 ieee80211_free_node(ni);
2674                 return ENOMEM;
2675         }
2676
2677         IEEE80211_TX_LOCK(ic);
2678         ieee80211_send_setup(ni, m,
2679              IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2680              IEEE80211_NONQOS_TID, sa, da, sa);
2681         m->m_flags |= M_ENCAP;          /* mark encapsulated */
2682
2683         memset(&params, 0, sizeof(params));
2684         params.ibp_pri = WME_AC_VO;
2685         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2686         if (IEEE80211_IS_MULTICAST(da))
2687                 params.ibp_try0 = 1;
2688         else
2689                 params.ibp_try0 = ni->ni_txparms->maxretry;
2690         params.ibp_power = ni->ni_txpower;
2691
2692         IEEE80211_NODE_STAT(ni, tx_mgmt);
2693
2694         ret = ieee80211_raw_output(vap, ni, m, &params);
2695         IEEE80211_TX_UNLOCK(ic);
2696         return (ret);
2697 }
2698
2699 #define ADDSHORT(frm, v) do {                   \
2700         frm[0] = (v) & 0xff;                    \
2701         frm[1] = (v) >> 8;                      \
2702         frm += 2;                               \
2703 } while (0)
2704 #define ADDWORD(frm, v) do {                    \
2705         frm[0] = (v) & 0xff;                    \
2706         frm[1] = ((v) >> 8) & 0xff;             \
2707         frm[2] = ((v) >> 16) & 0xff;            \
2708         frm[3] = ((v) >> 24) & 0xff;            \
2709         frm += 4;                               \
2710 } while (0)
2711
2712 static int
2713 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2714         int category, int action, void *args0)
2715 {
2716         struct ieee80211vap *vap = ni->ni_vap;
2717         struct ieee80211com *ic = ni->ni_ic;
2718         uint16_t *args = args0;
2719         const struct ieee80211_rateset *rs;
2720         struct mbuf *m;
2721         uint8_t *frm;
2722
2723         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2724             "send PEER OPEN action: localid 0x%x", args[0]);
2725
2726         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2727             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2728             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2729         ieee80211_ref_node(ni);
2730
2731         m = ieee80211_getmgtframe(&frm,
2732             ic->ic_headroom + sizeof(struct ieee80211_frame),
2733             sizeof(uint16_t)    /* action+category */
2734             + sizeof(uint16_t)  /* capabilites */
2735             + 2 + IEEE80211_RATE_SIZE
2736             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2737             + 2 + IEEE80211_MESHID_LEN
2738             + sizeof(struct ieee80211_meshconf_ie)
2739             + sizeof(struct ieee80211_meshpeer_ie)
2740         );
2741         if (m != NULL) {
2742                 /*
2743                  * mesh peer open action frame format:
2744                  *   [1] category
2745                  *   [1] action
2746                  *   [2] capabilities
2747                  *   [tlv] rates
2748                  *   [tlv] xrates
2749                  *   [tlv] mesh id
2750                  *   [tlv] mesh conf
2751                  *   [tlv] mesh peer link mgmt
2752                  */
2753                 *frm++ = category;
2754                 *frm++ = action;
2755                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2756                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2757                 frm = ieee80211_add_rates(frm, rs);
2758                 frm = ieee80211_add_xrates(frm, rs);
2759                 frm = ieee80211_add_meshid(frm, vap);
2760                 frm = ieee80211_add_meshconf(frm, vap);
2761                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2762                     args[0], 0, 0);
2763                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2764                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2765         } else {
2766                 vap->iv_stats.is_tx_nobuf++;
2767                 ieee80211_free_node(ni);
2768                 return ENOMEM;
2769         }
2770 }
2771
2772 static int
2773 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2774         int category, int action, void *args0)
2775 {
2776         struct ieee80211vap *vap = ni->ni_vap;
2777         struct ieee80211com *ic = ni->ni_ic;
2778         uint16_t *args = args0;
2779         const struct ieee80211_rateset *rs;
2780         struct mbuf *m;
2781         uint8_t *frm;
2782
2783         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2784             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2785             args[0], args[1]);
2786
2787         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2788             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2789             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2790         ieee80211_ref_node(ni);
2791
2792         m = ieee80211_getmgtframe(&frm,
2793             ic->ic_headroom + sizeof(struct ieee80211_frame),
2794             sizeof(uint16_t)    /* action+category */
2795             + sizeof(uint16_t)  /* capabilites */
2796             + sizeof(uint16_t)  /* status code */
2797             + sizeof(uint16_t)  /* AID */
2798             + 2 + IEEE80211_RATE_SIZE
2799             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2800             + 2 + IEEE80211_MESHID_LEN
2801             + sizeof(struct ieee80211_meshconf_ie)
2802             + sizeof(struct ieee80211_meshpeer_ie)
2803         );
2804         if (m != NULL) {
2805                 /*
2806                  * mesh peer confirm action frame format:
2807                  *   [1] category
2808                  *   [1] action
2809                  *   [2] capabilities
2810                  *   [2] status code
2811                  *   [2] association id (peer ID)
2812                  *   [tlv] rates
2813                  *   [tlv] xrates
2814                  *   [tlv] mesh id
2815                  *   [tlv] mesh conf
2816                  *   [tlv] mesh peer link mgmt
2817                  */
2818                 *frm++ = category;
2819                 *frm++ = action;
2820                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2821                 ADDSHORT(frm, 0);               /* status code */
2822                 ADDSHORT(frm, args[1]);         /* AID */
2823                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2824                 frm = ieee80211_add_rates(frm, rs);
2825                 frm = ieee80211_add_xrates(frm, rs);
2826                 frm = ieee80211_add_meshid(frm, vap);
2827                 frm = ieee80211_add_meshconf(frm, vap);
2828                 frm = ieee80211_add_meshpeer(frm,
2829                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2830                     args[0], args[1], 0);
2831                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2832                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2833         } else {
2834                 vap->iv_stats.is_tx_nobuf++;
2835                 ieee80211_free_node(ni);
2836                 return ENOMEM;
2837         }
2838 }
2839
2840 static int
2841 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2842         int category, int action, void *args0)
2843 {
2844         struct ieee80211vap *vap = ni->ni_vap;
2845         struct ieee80211com *ic = ni->ni_ic;
2846         uint16_t *args = args0;
2847         struct mbuf *m;
2848         uint8_t *frm;
2849
2850         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2851             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d (%s)",
2852             args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
2853
2854         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2855             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2856             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2857         ieee80211_ref_node(ni);
2858
2859         m = ieee80211_getmgtframe(&frm,
2860             ic->ic_headroom + sizeof(struct ieee80211_frame),
2861             sizeof(uint16_t)    /* action+category */
2862             + sizeof(uint16_t)  /* reason code */
2863             + 2 + IEEE80211_MESHID_LEN
2864             + sizeof(struct ieee80211_meshpeer_ie)
2865         );
2866         if (m != NULL) {
2867                 /*
2868                  * mesh peer close action frame format:
2869                  *   [1] category
2870                  *   [1] action
2871                  *   [tlv] mesh id
2872                  *   [tlv] mesh peer link mgmt
2873                  */
2874                 *frm++ = category;
2875                 *frm++ = action;
2876                 frm = ieee80211_add_meshid(frm, vap);
2877                 frm = ieee80211_add_meshpeer(frm,
2878                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2879                     args[0], args[1], args[2]);
2880                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2881                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2882         } else {
2883                 vap->iv_stats.is_tx_nobuf++;
2884                 ieee80211_free_node(ni);
2885                 return ENOMEM;
2886         }
2887 }
2888
2889 static int
2890 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2891         int category, int action, void *arg0)
2892 {
2893         struct ieee80211vap *vap = ni->ni_vap;
2894         struct ieee80211com *ic = ni->ni_ic;
2895         struct ieee80211_meshlmetric_ie *ie = arg0;
2896         struct mbuf *m;
2897         uint8_t *frm;
2898
2899         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2900                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2901                     ni, "%s", "send LINK METRIC REQUEST action");
2902         } else {
2903                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2904                     ni, "send LINK METRIC REPLY action: metric 0x%x",
2905                     ie->lm_metric);
2906         }
2907         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2908             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2909             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2910         ieee80211_ref_node(ni);
2911
2912         m = ieee80211_getmgtframe(&frm,
2913             ic->ic_headroom + sizeof(struct ieee80211_frame),
2914             sizeof(uint16_t) +  /* action+category */
2915             sizeof(struct ieee80211_meshlmetric_ie)
2916         );
2917         if (m != NULL) {
2918                 /*
2919                  * mesh link metric
2920                  *   [1] category
2921                  *   [1] action
2922                  *   [tlv] mesh link metric
2923                  */
2924                 *frm++ = category;
2925                 *frm++ = action;
2926                 frm = ieee80211_add_meshlmetric(frm,
2927                     ie->lm_flags, ie->lm_metric);
2928                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2929                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2930         } else {
2931                 vap->iv_stats.is_tx_nobuf++;
2932                 ieee80211_free_node(ni);
2933                 return ENOMEM;
2934         }
2935 }
2936
2937 static int
2938 mesh_send_action_meshgate(struct ieee80211_node *ni,
2939         int category, int action, void *arg0)
2940 {
2941         struct ieee80211vap *vap = ni->ni_vap;
2942         struct ieee80211com *ic = ni->ni_ic;
2943         struct ieee80211_meshgann_ie *ie = arg0;
2944         struct mbuf *m;
2945         uint8_t *frm;
2946
2947         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2948             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2949             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2950         ieee80211_ref_node(ni);
2951
2952         m = ieee80211_getmgtframe(&frm,
2953             ic->ic_headroom + sizeof(struct ieee80211_frame),
2954             sizeof(uint16_t) +  /* action+category */
2955             IEEE80211_MESHGANN_BASE_SZ
2956         );
2957         if (m != NULL) {
2958                 /*
2959                  * mesh link metric
2960                  *   [1] category
2961                  *   [1] action
2962                  *   [tlv] mesh gate announcement
2963                  */
2964                 *frm++ = category;
2965                 *frm++ = action;
2966                 frm = ieee80211_add_meshgate(frm, ie);
2967                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2968                 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2969         } else {
2970                 vap->iv_stats.is_tx_nobuf++;
2971                 ieee80211_free_node(ni);
2972                 return ENOMEM;
2973         }
2974 }
2975
2976 static void
2977 mesh_peer_timeout_setup(struct ieee80211_node *ni)
2978 {
2979         switch (ni->ni_mlstate) {
2980         case IEEE80211_NODE_MESH_HOLDING:
2981                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
2982                 break;
2983         case IEEE80211_NODE_MESH_CONFIRMRCV:
2984                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
2985                 break;
2986         case IEEE80211_NODE_MESH_IDLE:
2987                 ni->ni_mltval = 0;
2988                 break;
2989         default:
2990                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
2991                 break;
2992         }
2993         if (ni->ni_mltval)
2994                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
2995                     mesh_peer_timeout_cb, ni);
2996 }
2997
2998 /*
2999  * Same as above but backoffs timer statisically 50%.
3000  */
3001 static void
3002 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3003 {
3004         uint32_t r;
3005
3006         r = arc4random();
3007         ni->ni_mltval += r % ni->ni_mltval;
3008         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3009             ni);
3010 }
3011
3012 static __inline void
3013 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3014 {
3015         callout_drain(&ni->ni_mltimer);
3016 }
3017
3018 static void
3019 mesh_peer_backoff_cb(void *arg)
3020 {
3021         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3022
3023         /* After backoff timeout, try to peer automatically again. */
3024         ni->ni_mlhcnt = 0;
3025 }
3026
3027 /*
3028  * Mesh Peer Link Management FSM timeout handling.
3029  */
3030 static void
3031 mesh_peer_timeout_cb(void *arg)
3032 {
3033         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3034         uint16_t args[3];
3035
3036         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3037             ni, "mesh link timeout, state %d, retry counter %d",
3038             ni->ni_mlstate, ni->ni_mlrcnt);
3039
3040         switch (ni->ni_mlstate) {
3041         case IEEE80211_NODE_MESH_IDLE:
3042         case IEEE80211_NODE_MESH_ESTABLISHED:
3043                 break;
3044         case IEEE80211_NODE_MESH_OPENSNT:
3045         case IEEE80211_NODE_MESH_OPENRCV:
3046                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3047                         args[0] = ni->ni_mlpid;
3048                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3049                         ieee80211_send_action(ni,
3050                             IEEE80211_ACTION_CAT_SELF_PROT,
3051                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3052                         ni->ni_mlrcnt = 0;
3053                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3054                         mesh_peer_timeout_setup(ni);
3055                 } else {
3056                         args[0] = ni->ni_mlpid;
3057                         ieee80211_send_action(ni,
3058                             IEEE80211_ACTION_CAT_SELF_PROT,
3059                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
3060                         ni->ni_mlrcnt++;
3061                         mesh_peer_timeout_backoff(ni);
3062                 }
3063                 break;
3064         case IEEE80211_NODE_MESH_CONFIRMRCV:
3065                 args[0] = ni->ni_mlpid;
3066                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3067                 ieee80211_send_action(ni,
3068                     IEEE80211_ACTION_CAT_SELF_PROT,
3069                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3070                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3071                 mesh_peer_timeout_setup(ni);
3072                 break;
3073         case IEEE80211_NODE_MESH_HOLDING:
3074                 ni->ni_mlhcnt++;
3075                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3076                         callout_reset(&ni->ni_mlhtimer,
3077                             ieee80211_mesh_backofftimeout,
3078                             mesh_peer_backoff_cb, ni);
3079                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3080                 break;
3081         }
3082 }
3083
3084 static int
3085 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3086 {
3087         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3088
3089         if (ie == NULL || ie[1] != ms->ms_idlen)
3090                 return 1;
3091         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3092 }
3093
3094 /*
3095  * Check if we are using the same algorithms for this mesh.
3096  */
3097 static int
3098 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3099 {
3100         const struct ieee80211_meshconf_ie *meshconf =
3101             (const struct ieee80211_meshconf_ie *) ie;
3102         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3103
3104         if (meshconf == NULL)
3105                 return 1;
3106         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3107                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3108                     "unknown path selection algorithm: 0x%x\n",
3109                     meshconf->conf_pselid);
3110                 return 1;
3111         }
3112         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3113                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3114                     "unknown path metric algorithm: 0x%x\n",
3115                     meshconf->conf_pmetid);
3116                 return 1;
3117         }
3118         if (meshconf->conf_ccid != 0) {
3119                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3120                     "unknown congestion control algorithm: 0x%x\n",
3121                     meshconf->conf_ccid);
3122                 return 1;
3123         }
3124         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3125                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3126                     "unknown sync algorithm: 0x%x\n",
3127                     meshconf->conf_syncid);
3128                 return 1;
3129         }
3130         if (meshconf->conf_authid != 0) {
3131                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3132                     "unknown auth auth algorithm: 0x%x\n",
3133                     meshconf->conf_pselid);
3134                 return 1;
3135         }
3136         /* Not accepting peers */
3137         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3138                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3139                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
3140                 return 1;
3141         }
3142         return 0;
3143 }
3144
3145 static int
3146 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3147     const uint8_t *ie)
3148 {
3149         const struct ieee80211_meshpeer_ie *meshpeer =
3150             (const struct ieee80211_meshpeer_ie *) ie;
3151
3152         if (meshpeer == NULL ||
3153             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3154             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3155                 return 1;
3156         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3157                 IEEE80211_DPRINTF(vap,
3158                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3159                     "Only MPM protocol is supported (proto: 0x%02X)",
3160                     meshpeer->peer_proto);
3161                 return 1;
3162         }
3163         switch (subtype) {
3164         case IEEE80211_ACTION_MESHPEERING_OPEN:
3165                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3166                         return 1;
3167                 break;
3168         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3169                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3170                         return 1;
3171                 break;
3172         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3173                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3174                         return 1;
3175                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3176                     meshpeer->peer_linkid != 0)
3177                         return 1;
3178                 if (meshpeer->peer_rcode == 0)
3179                         return 1;
3180                 break;
3181         }
3182         return 0;
3183 }
3184
3185 /*
3186  * Add a Mesh ID IE to a frame.
3187  */
3188 uint8_t *
3189 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3190 {
3191         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3192
3193         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3194
3195         *frm++ = IEEE80211_ELEMID_MESHID;
3196         *frm++ = ms->ms_idlen;
3197         memcpy(frm, ms->ms_id, ms->ms_idlen);
3198         return frm + ms->ms_idlen;
3199 }
3200
3201 /*
3202  * Add a Mesh Configuration IE to a frame.
3203  * For now just use HWMP routing, Airtime link metric, Null Congestion
3204  * Signaling, Null Sync Protocol and Null Authentication.
3205  */
3206 uint8_t *
3207 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3208 {
3209         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3210         uint16_t caps;
3211
3212         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3213
3214         *frm++ = IEEE80211_ELEMID_MESHCONF;
3215         *frm++ = IEEE80211_MESH_CONF_SZ;
3216         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
3217         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
3218         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3219         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3220         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3221         /* NB: set the number of neighbors before the rest */
3222         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3223             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3224         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3225                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3226         frm += 1;
3227         caps = 0;
3228         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3229                 caps |= IEEE80211_MESHCONF_CAP_AP;
3230         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3231                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3232         *frm++ = caps;
3233         return frm;
3234 }
3235
3236 /*
3237  * Add a Mesh Peer Management IE to a frame.
3238  */
3239 uint8_t *
3240 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3241     uint16_t peerid, uint16_t reason)
3242 {
3243
3244         KASSERT(localid != 0, ("localid == 0"));
3245
3246         *frm++ = IEEE80211_ELEMID_MESHPEER;
3247         switch (subtype) {
3248         case IEEE80211_ACTION_MESHPEERING_OPEN:
3249                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
3250                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3251                 ADDSHORT(frm, localid);                 /* local ID */
3252                 break;
3253         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3254                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3255                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
3256                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3257                 ADDSHORT(frm, localid);                 /* local ID */
3258                 ADDSHORT(frm, peerid);                  /* peer ID */
3259                 break;
3260         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3261                 if (peerid)
3262                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
3263                 else
3264                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3265                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3266                 ADDSHORT(frm, localid); /* local ID */
3267                 if (peerid)
3268                         ADDSHORT(frm, peerid);  /* peer ID */
3269                 ADDSHORT(frm, reason);
3270                 break;
3271         }
3272         return frm;
3273 }
3274
3275 /*
3276  * Compute an Airtime Link Metric for the link with this node.
3277  *
3278  * Based on Draft 3.0 spec (11B.10, p.149).
3279  */
3280 /*
3281  * Max 802.11s overhead.
3282  */
3283 #define IEEE80211_MESH_MAXOVERHEAD \
3284         (sizeof(struct ieee80211_qosframe_addr4) \
3285          + sizeof(struct ieee80211_meshcntl_ae10) \
3286         + sizeof(struct llc) \
3287         + IEEE80211_ADDR_LEN \
3288         + IEEE80211_WEP_IVLEN \
3289         + IEEE80211_WEP_KIDLEN \
3290         + IEEE80211_WEP_CRCLEN \
3291         + IEEE80211_WEP_MICLEN \
3292         + IEEE80211_CRC_LEN)
3293 uint32_t
3294 mesh_airtime_calc(struct ieee80211_node *ni)
3295 {
3296 #define M_BITS 8
3297 #define S_FACTOR (2 * M_BITS)
3298         struct ieee80211com *ic = ni->ni_ic;
3299         struct ifnet *ifp = ni->ni_vap->iv_ifp;
3300         const static int nbits = 8192 << M_BITS;
3301         uint32_t overhead, rate, errrate;
3302         uint64_t res;
3303
3304         /* Time to transmit a frame */
3305         rate = ni->ni_txrate;
3306         overhead = ieee80211_compute_duration(ic->ic_rt,
3307             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3308         /* Error rate in percentage */
3309         /* XXX assuming small failures are ok */
3310         errrate = (((ifp->if_get_counter(ifp, IFCOUNTER_OERRORS) +
3311             ifp->if_get_counter(ifp, IFCOUNTER_IERRORS)) / 100) << M_BITS)
3312             / 100;
3313         res = (overhead + (nbits / rate)) *
3314             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3315
3316         return (uint32_t)(res >> S_FACTOR);
3317 #undef M_BITS
3318 #undef S_FACTOR
3319 }
3320
3321 /*
3322  * Add a Mesh Link Metric report IE to a frame.
3323  */
3324 uint8_t *
3325 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3326 {
3327         *frm++ = IEEE80211_ELEMID_MESHLINK;
3328         *frm++ = 5;
3329         *frm++ = flags;
3330         ADDWORD(frm, metric);
3331         return frm;
3332 }
3333
3334 /*
3335  * Add a Mesh Gate Announcement IE to a frame.
3336  */
3337 uint8_t *
3338 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3339 {
3340         *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3341         *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3342         *frm++ = ie->gann_flags;
3343         *frm++ = ie->gann_hopcount;
3344         *frm++ = ie->gann_ttl;
3345         IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3346         frm += 6;
3347         ADDWORD(frm, ie->gann_seq);
3348         ADDSHORT(frm, ie->gann_interval);
3349         return frm;
3350 }
3351 #undef ADDSHORT
3352 #undef ADDWORD
3353
3354 /*
3355  * Initialize any mesh-specific node state.
3356  */
3357 void
3358 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3359 {
3360         ni->ni_flags |= IEEE80211_NODE_QOS;
3361         callout_init(&ni->ni_mltimer, 1);
3362         callout_init(&ni->ni_mlhtimer, 1);
3363 }
3364
3365 /*
3366  * Cleanup any mesh-specific node state.
3367  */
3368 void
3369 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3370 {
3371         struct ieee80211vap *vap = ni->ni_vap;
3372         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3373
3374         callout_drain(&ni->ni_mltimer);
3375         callout_drain(&ni->ni_mlhtimer);
3376         /* NB: short-circuit callbacks after mesh_vdetach */
3377         if (vap->iv_mesh != NULL)
3378                 ms->ms_ppath->mpp_peerdown(ni);
3379 }
3380
3381 void
3382 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3383 {
3384         ni->ni_meshidlen = ie[1];
3385         memcpy(ni->ni_meshid, ie + 2, ie[1]);
3386 }
3387
3388 /*
3389  * Setup mesh-specific node state on neighbor discovery.
3390  */
3391 void
3392 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3393         const struct ieee80211_frame *wh,
3394         const struct ieee80211_scanparams *sp)
3395 {
3396         ieee80211_parse_meshid(ni, sp->meshid);
3397 }
3398
3399 void
3400 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3401         struct ieee80211_beacon_offsets *bo)
3402 {
3403         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3404
3405         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3406                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3407                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3408         }
3409 }
3410
3411 static int
3412 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3413 {
3414         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3415         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3416         struct ieee80211_mesh_route *rt;
3417         struct ieee80211req_mesh_route *imr;
3418         size_t len, off;
3419         uint8_t *p;
3420         int error;
3421
3422         if (vap->iv_opmode != IEEE80211_M_MBSS)
3423                 return ENOSYS;
3424
3425         error = 0;
3426         switch (ireq->i_type) {
3427         case IEEE80211_IOC_MESH_ID:
3428                 ireq->i_len = ms->ms_idlen;
3429                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3430                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3431                 break;
3432         case IEEE80211_IOC_MESH_AP:
3433                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3434                 break;
3435         case IEEE80211_IOC_MESH_FWRD:
3436                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3437                 break;
3438         case IEEE80211_IOC_MESH_GATE:
3439                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3440                 break;
3441         case IEEE80211_IOC_MESH_TTL:
3442                 ireq->i_val = ms->ms_ttl;
3443                 break;
3444         case IEEE80211_IOC_MESH_RTCMD:
3445                 switch (ireq->i_val) {
3446                 case IEEE80211_MESH_RTCMD_LIST:
3447                         len = 0;
3448                         MESH_RT_LOCK(ms);
3449                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3450                                 len += sizeof(*imr);
3451                         }
3452                         MESH_RT_UNLOCK(ms);
3453                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3454                                 ireq->i_len = len;
3455                                 return ENOMEM;
3456                         }
3457                         ireq->i_len = len;
3458                         /* XXX M_WAIT? */
3459                         p = IEEE80211_MALLOC(len, M_TEMP,
3460                             IEEE80211_M_NOWAIT | IEEE80211_M_ZERO);
3461                         if (p == NULL)
3462                                 return ENOMEM;
3463                         off = 0;
3464                         MESH_RT_LOCK(ms);
3465                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3466                                 if (off >= len)
3467                                         break;
3468                                 imr = (struct ieee80211req_mesh_route *)
3469                                     (p + off);
3470                                 IEEE80211_ADDR_COPY(imr->imr_dest,
3471                                     rt->rt_dest);
3472                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3473                                     rt->rt_nexthop);
3474                                 imr->imr_metric = rt->rt_metric;
3475                                 imr->imr_nhops = rt->rt_nhops;
3476                                 imr->imr_lifetime =
3477                                     ieee80211_mesh_rt_update(rt, 0);
3478                                 imr->imr_lastmseq = rt->rt_lastmseq;
3479                                 imr->imr_flags = rt->rt_flags; /* last */
3480                                 off += sizeof(*imr);
3481                         }
3482                         MESH_RT_UNLOCK(ms);
3483                         error = copyout(p, (uint8_t *)ireq->i_data,
3484                             ireq->i_len);
3485                         IEEE80211_FREE(p, M_TEMP);
3486                         break;
3487                 case IEEE80211_MESH_RTCMD_FLUSH:
3488                 case IEEE80211_MESH_RTCMD_ADD:
3489                 case IEEE80211_MESH_RTCMD_DELETE:
3490                         return EINVAL;
3491                 default:
3492                         return ENOSYS;
3493                 }
3494                 break;
3495         case IEEE80211_IOC_MESH_PR_METRIC:
3496                 len = strlen(ms->ms_pmetric->mpm_descr);
3497                 if (ireq->i_len < len)
3498                         return EINVAL;
3499                 ireq->i_len = len;
3500                 error = copyout(ms->ms_pmetric->mpm_descr,
3501                     (uint8_t *)ireq->i_data, len);
3502                 break;
3503         case IEEE80211_IOC_MESH_PR_PATH:
3504                 len = strlen(ms->ms_ppath->mpp_descr);
3505                 if (ireq->i_len < len)
3506                         return EINVAL;
3507                 ireq->i_len = len;
3508                 error = copyout(ms->ms_ppath->mpp_descr,
3509                     (uint8_t *)ireq->i_data, len);
3510                 break;
3511         default:
3512                 return ENOSYS;
3513         }
3514
3515         return error;
3516 }
3517 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3518
3519 static int
3520 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3521 {
3522         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3523         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3524         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3525         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3526         int error;
3527
3528         if (vap->iv_opmode != IEEE80211_M_MBSS)
3529                 return ENOSYS;
3530
3531         error = 0;
3532         switch (ireq->i_type) {
3533         case IEEE80211_IOC_MESH_ID:
3534                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3535                         return EINVAL;
3536                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3537                 if (error != 0)
3538                         break;
3539                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3540                 ms->ms_idlen = ireq->i_len;
3541                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3542                 error = ENETRESET;
3543                 break;
3544         case IEEE80211_IOC_MESH_AP:
3545                 if (ireq->i_val)
3546                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3547                 else
3548                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3549                 error = ENETRESET;
3550                 break;
3551         case IEEE80211_IOC_MESH_FWRD:
3552                 if (ireq->i_val)
3553                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3554                 else
3555                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3556                 mesh_gatemode_setup(vap);
3557                 break;
3558         case IEEE80211_IOC_MESH_GATE:
3559                 if (ireq->i_val)
3560                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3561                 else
3562                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3563                 break;
3564         case IEEE80211_IOC_MESH_TTL:
3565                 ms->ms_ttl = (uint8_t) ireq->i_val;
3566                 break;
3567         case IEEE80211_IOC_MESH_RTCMD:
3568                 switch (ireq->i_val) {
3569                 case IEEE80211_MESH_RTCMD_LIST:
3570                         return EINVAL;
3571                 case IEEE80211_MESH_RTCMD_FLUSH:
3572                         ieee80211_mesh_rt_flush(vap);
3573                         break;
3574                 case IEEE80211_MESH_RTCMD_ADD:
3575                         error = copyin(ireq->i_data, tmpaddr,
3576                             IEEE80211_ADDR_LEN);
3577                         if (error != 0)
3578                                 break;
3579                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, tmpaddr) ||
3580                             IEEE80211_ADDR_EQ(broadcastaddr, tmpaddr))
3581                                 return EINVAL;
3582                         ieee80211_mesh_discover(vap, tmpaddr, NULL);
3583                         break;
3584                 case IEEE80211_MESH_RTCMD_DELETE:
3585                         error = copyin(ireq->i_data, tmpaddr,
3586                             IEEE80211_ADDR_LEN);
3587                         if (error != 0)
3588                                 break;
3589                         ieee80211_mesh_rt_del(vap, tmpaddr);
3590                         break;
3591                 default:
3592                         return ENOSYS;
3593                 }
3594                 break;
3595         case IEEE80211_IOC_MESH_PR_METRIC:
3596                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3597                 if (error == 0) {
3598                         error = mesh_select_proto_metric(vap, tmpproto);
3599                         if (error == 0)
3600                                 error = ENETRESET;
3601                 }
3602                 break;
3603         case IEEE80211_IOC_MESH_PR_PATH:
3604                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3605                 if (error == 0) {
3606                         error = mesh_select_proto_path(vap, tmpproto);
3607                         if (error == 0)
3608                                 error = ENETRESET;
3609                 }
3610                 break;
3611         default:
3612                 return ENOSYS;
3613         }
3614         return error;
3615 }
3616 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);