sys/net80211/ieee80211_mesh.c

   1 /*-
   2  * Copyright (c) 2009 The FreeBSD Foundation
   3  * All rights reserved.
   4  *
   5  * This software was developed by Rui Paulo under sponsorship from the
   6  * FreeBSD Foundation.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 #include <sys/cdefs.h>
  30 #ifdef __FreeBSD__
  31 __FBSDID("$FreeBSD$");
  32 #endif
  33
  34 /*
  35  * IEEE 802.11s Mesh Point (MBSS) support.
  36  *
  37  * Based on March 2009, D3.0 802.11s draft spec.
  38  */
  39 #include "opt_inet.h"
  40 #include "opt_wlan.h"
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/malloc.h>
  46 #include <sys/kernel.h>
  47
  48 #include <sys/socket.h>
  49 #include <sys/sockio.h>
  50 #include <sys/endian.h>
  51 #include <sys/errno.h>
  52 #include <sys/proc.h>
  53 #include <sys/sysctl.h>
  54
  55 #include <net/bpf.h>
  56 #include <net/if.h>
  57 #include <net/if_var.h>
  58 #include <net/if_media.h>
  59 #include <net/if_llc.h>
  60 #include <net/ethernet.h>
  61
  62 #include <net80211/ieee80211_var.h>
  63 #include <net80211/ieee80211_action.h>
  64 #ifdef IEEE80211_SUPPORT_SUPERG
  65 #include <net80211/ieee80211_superg.h>
  66 #endif
  67 #include <net80211/ieee80211_input.h>
  68 #include <net80211/ieee80211_mesh.h>
  69
  70 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
  71 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
  72 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
  73 static void     mesh_vattach(struct ieee80211vap *);
  74 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  75 static void     mesh_rt_cleanup_cb(void *);
  76 static void     mesh_gatemode_setup(struct ieee80211vap *);
  77 static void     mesh_gatemode_cb(void *);
  78 static void     mesh_linkchange(struct ieee80211_node *,
  79                     enum ieee80211_mesh_mlstate);
  80 static void     mesh_checkid(void *, struct ieee80211_node *);
  81 static uint32_t mesh_generateid(struct ieee80211vap *);
  82 static int      mesh_checkpseq(struct ieee80211vap *,
  83                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
  84 static void     mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
  85                     struct ieee80211_mesh_route *);
  86 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
  87                     const struct ieee80211_meshcntl *);
  88 static int      mesh_input(struct ieee80211_node *, struct mbuf *, int, int);
  89 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
  90                     int, int);
  91 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  92 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
  93 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
  94 static void     mesh_peer_timeout_cb(void *);
  95 static __inline void
  96                 mesh_peer_timeout_stop(struct ieee80211_node *);
  97 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
  98 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
  99 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
 100                     const uint8_t *);
 101 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
 102
 103 /*
 104  * Timeout values come from the specification and are in milliseconds.
 105  */
 106 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
 107     "IEEE 802.11s parameters");
 108 static int      ieee80211_mesh_gateint = -1;
 109 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW,
 110     &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
 111     "mesh gate interval (ms)");
 112 static int ieee80211_mesh_retrytimeout = -1;
 113 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
 114     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 115     "Retry timeout (msec)");
 116 static int ieee80211_mesh_holdingtimeout = -1;
 117
 118 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
 119     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 120     "Holding state timeout (msec)");
 121 static int ieee80211_mesh_confirmtimeout = -1;
 122 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
 123     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 124     "Confirm state timeout (msec)");
 125 static int ieee80211_mesh_backofftimeout = -1;
 126 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW,
 127     &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 128     "Backoff timeout (msec). This is to throutles peering forever when "
 129     "not receving answer or is rejected by a neighbor");
 130 static int ieee80211_mesh_maxretries = 2;
 131 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW,
 132     &ieee80211_mesh_maxretries, 0,
 133     "Maximum retries during peer link establishment");
 134 static int ieee80211_mesh_maxholding = 2;
 135 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLTYPE_INT | CTLFLAG_RW,
 136     &ieee80211_mesh_maxholding, 0,
 137     "Maximum times we are allowed to transition to HOLDING state before "
 138     "backinoff during peer link establishment");
 139
 140 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
 141         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 142
 143 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
 144 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
 145 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
 146 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
 147 static  ieee80211_recv_action_func mesh_recv_action_meshgate;
 148
 149 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
 150 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
 151 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
 152 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
 153 static  ieee80211_send_action_func mesh_send_action_meshgate;
 154
 155 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
 156         .mpm_descr      = "AIRTIME",
 157         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
 158         .mpm_metric     = mesh_airtime_calc,
 159 };
 160
 161 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
 162 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
 163
 164 #define RT_ENTRY_LOCK(rt)       mtx_lock(&(rt)->rt_lock)
 165 #define RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED)
 166 #define RT_ENTRY_UNLOCK(rt)     mtx_unlock(&(rt)->rt_lock)
 167
 168 #define MESH_RT_LOCK(ms)        mtx_lock(&(ms)->ms_rt_lock)
 169 #define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED)
 170 #define MESH_RT_UNLOCK(ms)      mtx_unlock(&(ms)->ms_rt_lock)
 171
 172 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
 173 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
 174 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
 175
 176 /* The longer one of the lifetime should be stored as new lifetime */
 177 #define MESH_ROUTE_LIFETIME_MAX(a, b)   (a > b ? a : b)
 178
 179 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
 180 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
 181
 182 /*
 183  * Helper functions to manipulate the Mesh routing table.
 184  */
 185
 186 static struct ieee80211_mesh_route *
 187 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
 188     const uint8_t dest[IEEE80211_ADDR_LEN])
 189 {
 190         struct ieee80211_mesh_route *rt;
 191
 192         MESH_RT_LOCK_ASSERT(ms);
 193
 194         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 195                 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
 196                         return rt;
 197         }
 198         return NULL;
 199 }
 200
 201 static struct ieee80211_mesh_route *
 202 mesh_rt_add_locked(struct ieee80211vap *vap,
 203     const uint8_t dest[IEEE80211_ADDR_LEN])
 204 {
 205         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 206         struct ieee80211_mesh_route *rt;
 207
 208         KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
 209             ("%s: adding broadcast to the routing table", __func__));
 210
 211         MESH_RT_LOCK_ASSERT(ms);
 212
 213         rt = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) +
 214             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | 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                 mtx_init(&rt->rt_lock, "MBSS_RT", "802.11s route entry", MTX_DEF);
 220                 callout_init(&rt->rt_discovery, CALLOUT_MPSAFE);
 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         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                 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         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         RT_ENTRY_LOCK(rt);
 360         callout_drain(&rt->rt_discovery);
 361         mtx_destroy(&rt->rt_lock);
 362         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 #define N(a)    (sizeof(a) / sizeof(a[0]))
 444 int
 445 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
 446 {
 447         int i, firstempty = -1;
 448
 449         for (i = 0; i < N(mesh_proto_paths); i++) {
 450                 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
 451                     IEEE80211_MESH_PROTO_DSZ) == 0)
 452                         return EEXIST;
 453                 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
 454                         firstempty = i;
 455         }
 456         if (firstempty < 0)
 457                 return ENOSPC;
 458         memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
 459         mesh_proto_paths[firstempty].mpp_active = 1;
 460         return 0;
 461 }
 462
 463 int
 464 ieee80211_mesh_register_proto_metric(const struct
 465     ieee80211_mesh_proto_metric *mpm)
 466 {
 467         int i, firstempty = -1;
 468
 469         for (i = 0; i < N(mesh_proto_metrics); i++) {
 470                 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
 471                     IEEE80211_MESH_PROTO_DSZ) == 0)
 472                         return EEXIST;
 473                 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
 474                         firstempty = i;
 475         }
 476         if (firstempty < 0)
 477                 return ENOSPC;
 478         memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
 479         mesh_proto_metrics[firstempty].mpm_active = 1;
 480         return 0;
 481 }
 482
 483 static int
 484 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
 485 {
 486         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 487         int i;
 488
 489         for (i = 0; i < N(mesh_proto_paths); i++) {
 490                 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
 491                         ms->ms_ppath = &mesh_proto_paths[i];
 492                         return 0;
 493                 }
 494         }
 495         return ENOENT;
 496 }
 497
 498 static int
 499 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
 500 {
 501         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 502         int i;
 503
 504         for (i = 0; i < N(mesh_proto_metrics); i++) {
 505                 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
 506                         ms->ms_pmetric = &mesh_proto_metrics[i];
 507                         return 0;
 508                 }
 509         }
 510         return ENOENT;
 511 }
 512 #undef  N
 513
 514 static void
 515 mesh_gatemode_setup(struct ieee80211vap *vap)
 516 {
 517         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 518
 519         /*
 520          * NB: When a mesh gate is running as a ROOT it shall
 521          * not send out periodic GANNs but instead mark the
 522          * mesh gate flag for the corresponding proactive PREQ
 523          * and RANN frames.
 524          */
 525         if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
 526             (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
 527                 callout_drain(&ms->ms_gatetimer);
 528                 return ;
 529         }
 530         callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
 531             mesh_gatemode_cb, vap);
 532 }
 533
 534 static void
 535 mesh_gatemode_cb(void *arg)
 536 {
 537         struct ieee80211vap *vap = (struct ieee80211vap *)arg;
 538         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 539         struct ieee80211_meshgann_ie gann;
 540
 541         gann.gann_flags = 0; /* Reserved */
 542         gann.gann_hopcount = 0;
 543         gann.gann_ttl = ms->ms_ttl;
 544         IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
 545         gann.gann_seq = ms->ms_gateseq++;
 546         gann.gann_interval = ieee80211_mesh_gateint;
 547
 548         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
 549             "send broadcast GANN (seq %u)", gann.gann_seq);
 550
 551         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
 552             IEEE80211_ACTION_MESH_GANN, &gann);
 553         mesh_gatemode_setup(vap);
 554 }
 555
 556 static void
 557 ieee80211_mesh_init(void)
 558 {
 559
 560         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
 561         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
 562
 563         /*
 564          * Setup mesh parameters that depends on the clock frequency.
 565          */
 566         ieee80211_mesh_gateint = msecs_to_ticks(10000);
 567         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
 568         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
 569         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
 570         ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
 571
 572         /*
 573          * Register action frame handlers.
 574          */
 575         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 576             IEEE80211_ACTION_MESHPEERING_OPEN,
 577             mesh_recv_action_meshpeering_open);
 578         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 579             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 580             mesh_recv_action_meshpeering_confirm);
 581         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 582             IEEE80211_ACTION_MESHPEERING_CLOSE,
 583             mesh_recv_action_meshpeering_close);
 584         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 585             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
 586         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 587             IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
 588
 589         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 590             IEEE80211_ACTION_MESHPEERING_OPEN,
 591             mesh_send_action_meshpeering_open);
 592         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 593             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 594             mesh_send_action_meshpeering_confirm);
 595         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 596             IEEE80211_ACTION_MESHPEERING_CLOSE,
 597             mesh_send_action_meshpeering_close);
 598         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 599             IEEE80211_ACTION_MESH_LMETRIC,
 600             mesh_send_action_meshlmetric);
 601         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 602             IEEE80211_ACTION_MESH_GANN,
 603             mesh_send_action_meshgate);
 604
 605         /*
 606          * Register Airtime Link Metric.
 607          */
 608         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
 609
 610 }
 611 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
 612
 613 void
 614 ieee80211_mesh_attach(struct ieee80211com *ic)
 615 {
 616         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
 617 }
 618
 619 void
 620 ieee80211_mesh_detach(struct ieee80211com *ic)
 621 {
 622 }
 623
 624 static void
 625 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
 626 {
 627         struct ieee80211com *ic = ni->ni_ic;
 628         uint16_t args[3];
 629
 630         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
 631                 args[0] = ni->ni_mlpid;
 632                 args[1] = ni->ni_mllid;
 633                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 634                 ieee80211_send_action(ni,
 635                     IEEE80211_ACTION_CAT_SELF_PROT,
 636                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 637                     args);
 638         }
 639         callout_drain(&ni->ni_mltimer);
 640         /* XXX belongs in hwmp */
 641         ieee80211_ageq_drain_node(&ic->ic_stageq,
 642            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
 643 }
 644
 645 static void
 646 mesh_vdetach(struct ieee80211vap *vap)
 647 {
 648         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 649
 650         callout_drain(&ms->ms_cleantimer);
 651         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
 652             NULL);
 653         ieee80211_mesh_rt_flush(vap);
 654         mtx_destroy(&ms->ms_rt_lock);
 655         ms->ms_ppath->mpp_vdetach(vap);
 656         free(vap->iv_mesh, M_80211_VAP);
 657         vap->iv_mesh = NULL;
 658 }
 659
 660 static void
 661 mesh_vattach(struct ieee80211vap *vap)
 662 {
 663         struct ieee80211_mesh_state *ms;
 664         vap->iv_newstate = mesh_newstate;
 665         vap->iv_input = mesh_input;
 666         vap->iv_opdetach = mesh_vdetach;
 667         vap->iv_recv_mgmt = mesh_recv_mgmt;
 668         vap->iv_recv_ctl = mesh_recv_ctl;
 669         ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
 670             M_NOWAIT | M_ZERO);
 671         if (ms == NULL) {
 672                 printf("%s: couldn't alloc MBSS state\n", __func__);
 673                 return;
 674         }
 675         vap->iv_mesh = ms;
 676         ms->ms_seq = 0;
 677         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
 678         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
 679         TAILQ_INIT(&ms->ms_known_gates);
 680         TAILQ_INIT(&ms->ms_routes);
 681         mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF);
 682         callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE);
 683         callout_init(&ms->ms_gatetimer, CALLOUT_MPSAFE);
 684         ms->ms_gateseq = 0;
 685         mesh_select_proto_metric(vap, "AIRTIME");
 686         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
 687         mesh_select_proto_path(vap, "HWMP");
 688         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
 689         ms->ms_ppath->mpp_vattach(vap);
 690 }
 691
 692 /*
 693  * IEEE80211_M_MBSS vap state machine handler.
 694  */
 695 static int
 696 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 697 {
 698         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 699         struct ieee80211com *ic = vap->iv_ic;
 700         struct ieee80211_node *ni;
 701         enum ieee80211_state ostate;
 702
 703         IEEE80211_LOCK_ASSERT(ic);
 704
 705         ostate = vap->iv_state;
 706         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 707             __func__, ieee80211_state_name[ostate],
 708             ieee80211_state_name[nstate], arg);
 709         vap->iv_state = nstate;         /* state transition */
 710         if (ostate != IEEE80211_S_SCAN)
 711                 ieee80211_cancel_scan(vap);     /* background scan */
 712         ni = vap->iv_bss;                       /* NB: no reference held */
 713         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
 714                 callout_drain(&ms->ms_cleantimer);
 715                 callout_drain(&ms->ms_gatetimer);
 716         }
 717         switch (nstate) {
 718         case IEEE80211_S_INIT:
 719                 switch (ostate) {
 720                 case IEEE80211_S_SCAN:
 721                         ieee80211_cancel_scan(vap);
 722                         break;
 723                 case IEEE80211_S_CAC:
 724                         ieee80211_dfs_cac_stop(vap);
 725                         break;
 726                 case IEEE80211_S_RUN:
 727                         ieee80211_iterate_nodes(&ic->ic_sta,
 728                             mesh_vdetach_peers, NULL);
 729                         break;
 730                 default:
 731                         break;
 732                 }
 733                 if (ostate != IEEE80211_S_INIT) {
 734                         /* NB: optimize INIT -> INIT case */
 735                         ieee80211_reset_bss(vap);
 736                         ieee80211_mesh_rt_flush(vap);
 737                 }
 738                 break;
 739         case IEEE80211_S_SCAN:
 740                 switch (ostate) {
 741                 case IEEE80211_S_INIT:
 742                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 743                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
 744                             ms->ms_idlen != 0) {
 745                                 /*
 746                                  * Already have a channel and a mesh ID; bypass
 747                                  * the scan and startup immediately.
 748                                  */
 749                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 750                                 break;
 751                         }
 752                         /*
 753                          * Initiate a scan.  We can come here as a result
 754                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 755                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 756                          * and the scan request parameters will be present
 757                          * in iv_scanreq.  Otherwise we do the default.
 758                         */
 759                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 760                                 ieee80211_check_scan(vap,
 761                                     vap->iv_scanreq_flags,
 762                                     vap->iv_scanreq_duration,
 763                                     vap->iv_scanreq_mindwell,
 764                                     vap->iv_scanreq_maxdwell,
 765                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 766                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 767                         } else
 768                                 ieee80211_check_scan_current(vap);
 769                         break;
 770                 default:
 771                         break;
 772                 }
 773                 break;
 774         case IEEE80211_S_CAC:
 775                 /*
 776                  * Start CAC on a DFS channel.  We come here when starting
 777                  * a bss on a DFS channel (see ieee80211_create_ibss).
 778                  */
 779                 ieee80211_dfs_cac_start(vap);
 780                 break;
 781         case IEEE80211_S_RUN:
 782                 switch (ostate) {
 783                 case IEEE80211_S_INIT:
 784                         /*
 785                          * Already have a channel; bypass the
 786                          * scan and startup immediately.
 787                          * Note that ieee80211_create_ibss will call
 788                          * back to do a RUN->RUN state change.
 789                          */
 790                         ieee80211_create_ibss(vap,
 791                             ieee80211_ht_adjust_channel(ic,
 792                                 ic->ic_curchan, vap->iv_flags_ht));
 793                         /* NB: iv_bss is changed on return */
 794                         break;
 795                 case IEEE80211_S_CAC:
 796                         /*
 797                          * NB: This is the normal state change when CAC
 798                          * expires and no radar was detected; no need to
 799                          * clear the CAC timer as it's already expired.
 800                          */
 801                         /* fall thru... */
 802                 case IEEE80211_S_CSA:
 803 #if 0
 804                         /*
 805                          * Shorten inactivity timer of associated stations
 806                          * to weed out sta's that don't follow a CSA.
 807                          */
 808                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 809 #endif
 810                         /*
 811                          * Update bss node channel to reflect where
 812                          * we landed after CSA.
 813                          */
 814                         ieee80211_node_set_chan(vap->iv_bss,
 815                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 816                                 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
 817                         /* XXX bypass debug msgs */
 818                         break;
 819                 case IEEE80211_S_SCAN:
 820                 case IEEE80211_S_RUN:
 821 #ifdef IEEE80211_DEBUG
 822                         if (ieee80211_msg_debug(vap)) {
 823                                 struct ieee80211_node *ni = vap->iv_bss;
 824                                 ieee80211_note(vap,
 825                                     "synchronized with %s meshid ",
 826                                     ether_sprintf(ni->ni_meshid));
 827                                 ieee80211_print_essid(ni->ni_meshid,
 828                                     ni->ni_meshidlen);
 829                                 /* XXX MCS/HT */
 830                                 printf(" channel %d\n",
 831                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
 832                         }
 833 #endif
 834                         break;
 835                 default:
 836                         break;
 837                 }
 838                 ieee80211_node_authorize(vap->iv_bss);
 839                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 840                     mesh_rt_cleanup_cb, vap);
 841                 mesh_gatemode_setup(vap);
 842                 break;
 843         default:
 844                 break;
 845         }
 846         /* NB: ostate not nstate */
 847         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
 848         return 0;
 849 }
 850
 851 static void
 852 mesh_rt_cleanup_cb(void *arg)
 853 {
 854         struct ieee80211vap *vap = arg;
 855         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 856
 857         mesh_rt_flush_invalid(vap);
 858         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 859             mesh_rt_cleanup_cb, vap);
 860 }
 861
 862 /*
 863  * Mark a mesh STA as gate and return a pointer to it.
 864  * If this is first time, we create a new gate route.
 865  * Always update the path route to this mesh gate.
 866  */
 867 struct ieee80211_mesh_gate_route *
 868 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
 869     struct ieee80211_mesh_route *rt)
 870 {
 871         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 872         struct ieee80211_mesh_gate_route *gr = NULL, *next;
 873         int found = 0;
 874
 875         MESH_RT_LOCK(ms);
 876         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
 877                 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
 878                         found = 1;
 879                         break;
 880                 }
 881         }
 882
 883         if (!found) {
 884                 /* New mesh gate add it to known table. */
 885                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
 886                     "%s", "stored new gate information from pro-PREQ.");
 887                 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
 888                     M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO);
 889                 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
 890                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
 891         }
 892         gr->gr_route = rt;
 893         /* TODO: link from path route to gate route */
 894         MESH_RT_UNLOCK(ms);
 895
 896         return gr;
 897 }
 898
 899
 900 /*
 901  * Helper function to note the Mesh Peer Link FSM change.
 902  */
 903 static void
 904 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
 905 {
 906         struct ieee80211vap *vap = ni->ni_vap;
 907         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 908 #ifdef IEEE80211_DEBUG
 909         static const char *meshlinkstates[] = {
 910                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
 911                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
 912                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
 913                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
 914                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
 915                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
 916         };
 917 #endif
 918         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
 919             ni, "peer link: %s -> %s",
 920             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
 921
 922         /* track neighbor count */
 923         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
 924             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 925                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
 926                 ms->ms_neighbors++;
 927                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 928         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
 929             state != IEEE80211_NODE_MESH_ESTABLISHED) {
 930                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
 931                 ms->ms_neighbors--;
 932                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 933         }
 934         ni->ni_mlstate = state;
 935         switch (state) {
 936         case IEEE80211_NODE_MESH_HOLDING:
 937                 ms->ms_ppath->mpp_peerdown(ni);
 938                 break;
 939         case IEEE80211_NODE_MESH_ESTABLISHED:
 940                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
 941                 break;
 942         default:
 943                 break;
 944         }
 945 }
 946
 947 /*
 948  * Helper function to generate a unique local ID required for mesh
 949  * peer establishment.
 950  */
 951 static void
 952 mesh_checkid(void *arg, struct ieee80211_node *ni)
 953 {
 954         uint16_t *r = arg;
 955
 956         if (*r == ni->ni_mllid)
 957                 *(uint16_t *)arg = 0;
 958 }
 959
 960 static uint32_t
 961 mesh_generateid(struct ieee80211vap *vap)
 962 {
 963         int maxiter = 4;
 964         uint16_t r;
 965
 966         do {
 967                 get_random_bytes(&r, 2);
 968                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
 969                 maxiter--;
 970         } while (r == 0 && maxiter > 0);
 971         return r;
 972 }
 973
 974 /*
 975  * Verifies if we already received this packet by checking its
 976  * sequence number.
 977  * Returns 0 if the frame is to be accepted, 1 otherwise.
 978  */
 979 static int
 980 mesh_checkpseq(struct ieee80211vap *vap,
 981     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
 982 {
 983         struct ieee80211_mesh_route *rt;
 984
 985         rt = ieee80211_mesh_rt_find(vap, source);
 986         if (rt == NULL) {
 987                 rt = ieee80211_mesh_rt_add(vap, source);
 988                 if (rt == NULL) {
 989                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 990                             "%s", "add mcast route failed");
 991                         vap->iv_stats.is_mesh_rtaddfailed++;
 992                         return 1;
 993                 }
 994                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 995                     "add mcast route, mesh seqno %d", seq);
 996                 rt->rt_lastmseq = seq;
 997                 return 0;
 998         }
 999         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
1000                 return 1;
1001         } else {
1002                 rt->rt_lastmseq = seq;
1003                 return 0;
1004         }
1005 }
1006
1007 /*
1008  * Iterate the routing table and locate the next hop.
1009  */
1010 struct ieee80211_node *
1011 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1012     const uint8_t dest[IEEE80211_ADDR_LEN])
1013 {
1014         struct ieee80211_mesh_route *rt;
1015
1016         rt = ieee80211_mesh_rt_find(vap, dest);
1017         if (rt == NULL)
1018                 return NULL;
1019         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1020                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1021                     "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1022                 /* XXX stat */
1023                 return NULL;
1024         }
1025         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1026                 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1027                 if (rt == NULL) return NULL;
1028                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1029                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1030                             "%s: meshgate !valid, flags 0x%x", __func__,
1031                             rt->rt_flags);
1032                         /* XXX stat */
1033                         return NULL;
1034                 }
1035         }
1036         return ieee80211_find_txnode(vap, rt->rt_nexthop);
1037 }
1038
1039 static void
1040 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1041     struct ieee80211_mesh_route *rt_gate)
1042 {
1043         struct ifnet *ifp = vap->iv_ifp;
1044         struct ieee80211_node *ni;
1045
1046         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1047
1048         ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1049         if (ni == NULL) {
1050                 ifp->if_oerrors++;
1051                 m_freem(m);
1052                 return;
1053         }
1054
1055         /*
1056          * Send through the VAP packet transmit path.
1057          * This consumes the node ref grabbed above and
1058          * the mbuf, regardless of whether there's a problem
1059          * or not.
1060          */
1061         (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1062 }
1063
1064 /*
1065  * Forward the queued frames to known valid mesh gates.
1066  * Assume destination to be outside the MBSS (i.e. proxy entry),
1067  * If no valid mesh gates are known silently discard queued frames.
1068  * After transmitting frames to all known valid mesh gates, this route
1069  * will be marked invalid, and a new path discovery will happen in the hopes
1070  * that (at least) one of the mesh gates have a new proxy entry for us to use.
1071  */
1072 void
1073 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1074     struct ieee80211_mesh_route *rt_dest)
1075 {
1076         struct ieee80211com *ic = vap->iv_ic;
1077         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1078         struct ieee80211_mesh_route *rt_gate;
1079         struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1080         struct mbuf *m, *mcopy, *next;
1081
1082         IEEE80211_TX_UNLOCK_ASSERT(ic);
1083
1084         KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1085             ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1086
1087         /* XXX: send to more than one valid mash gate */
1088         MESH_RT_LOCK(ms);
1089
1090         m = ieee80211_ageq_remove(&ic->ic_stageq,
1091             (struct ieee80211_node *)(uintptr_t)
1092             ieee80211_mac_hash(ic, rt_dest->rt_dest));
1093
1094         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1095                 rt_gate = gr->gr_route;
1096                 if (rt_gate == NULL) {
1097                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1098                                 rt_dest->rt_dest,
1099                                 "mesh gate with no path %6D",
1100                                 gr->gr_addr, ":");
1101                         continue;
1102                 }
1103                 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1104                         continue;
1105                 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1106                     ("route not marked as a mesh gate"));
1107                 KASSERT((rt_gate->rt_flags &
1108                         IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1109                         ("found mesh gate that is also marked porxy"));
1110                 /*
1111                  * convert route to a proxy route gated by the current
1112                  * mesh gate, this is needed so encap can built data
1113                  * frame with correct address.
1114                  */
1115                 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1116                         IEEE80211_MESHRT_FLAGS_VALID;
1117                 rt_dest->rt_ext_seq = 1; /* random value */
1118                 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1119                 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1120                 rt_dest->rt_metric = rt_gate->rt_metric;
1121                 rt_dest->rt_nhops = rt_gate->rt_nhops;
1122                 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1123                 MESH_RT_UNLOCK(ms);
1124                 /* XXX: lock?? */
1125                 mcopy = m_dup(m, M_NOWAIT);
1126                 for (; mcopy != NULL; mcopy = next) {
1127                         next = mcopy->m_nextpkt;
1128                         mcopy->m_nextpkt = NULL;
1129                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1130                             rt_dest->rt_dest,
1131                             "flush queued frame %p len %d", mcopy,
1132                             mcopy->m_pkthdr.len);
1133                         mesh_transmit_to_gate(vap, mcopy, rt_gate);
1134                 }
1135                 MESH_RT_LOCK(ms);
1136         }
1137         rt_dest->rt_flags = 0; /* Mark invalid */
1138         m_freem(m);
1139         MESH_RT_UNLOCK(ms);
1140 }
1141
1142 /*
1143  * Forward the specified frame.
1144  * Decrement the TTL and set TA to our MAC address.
1145  */
1146 static void
1147 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1148     const struct ieee80211_meshcntl *mc)
1149 {
1150         struct ieee80211com *ic = vap->iv_ic;
1151         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1152         struct ifnet *ifp = vap->iv_ifp;
1153         const struct ieee80211_frame *wh =
1154             mtod(m, const struct ieee80211_frame *);
1155         struct mbuf *mcopy;
1156         struct ieee80211_meshcntl *mccopy;
1157         struct ieee80211_frame *whcopy;
1158         struct ieee80211_node *ni;
1159         int err;
1160
1161         /* This is called from the RX path - don't hold this lock */
1162         IEEE80211_TX_UNLOCK_ASSERT(ic);
1163
1164         /*
1165          * mesh ttl of 1 means we are the last one receving it,
1166          * according to amendment we decrement and then check if
1167          * 0, if so we dont forward.
1168          */
1169         if (mc->mc_ttl < 1) {
1170                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1171                     "%s", "frame not fwd'd, ttl 1");
1172                 vap->iv_stats.is_mesh_fwd_ttl++;
1173                 return;
1174         }
1175         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1176                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1177                     "%s", "frame not fwd'd, fwding disabled");
1178                 vap->iv_stats.is_mesh_fwd_disabled++;
1179                 return;
1180         }
1181         mcopy = m_dup(m, M_NOWAIT);
1182         if (mcopy == NULL) {
1183                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1184                     "%s", "frame not fwd'd, cannot dup");
1185                 vap->iv_stats.is_mesh_fwd_nobuf++;
1186                 ifp->if_oerrors++;
1187                 return;
1188         }
1189         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1190             sizeof(struct ieee80211_meshcntl));
1191         if (mcopy == NULL) {
1192                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1193                     "%s", "frame not fwd'd, too short");
1194                 vap->iv_stats.is_mesh_fwd_tooshort++;
1195                 ifp->if_oerrors++;
1196                 m_freem(mcopy);
1197                 return;
1198         }
1199         whcopy = mtod(mcopy, struct ieee80211_frame *);
1200         mccopy = (struct ieee80211_meshcntl *)
1201             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1202         /* XXX clear other bits? */
1203         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1204         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1205         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1206                 ni = ieee80211_ref_node(vap->iv_bss);
1207                 mcopy->m_flags |= M_MCAST;
1208         } else {
1209                 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1210                 if (ni == NULL) {
1211                         /*
1212                          * [Optional] any of the following three actions:
1213                          * o silently discard
1214                          * o trigger a path discovery
1215                          * o inform TA that meshDA is unknown.
1216                          */
1217                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1218                             "%s", "frame not fwd'd, no path");
1219                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1220                             IEEE80211_REASON_MESH_PERR_NO_FI);
1221                         vap->iv_stats.is_mesh_fwd_nopath++;
1222                         m_freem(mcopy);
1223                         return;
1224                 }
1225                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1226         }
1227         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1228         mccopy->mc_ttl--;
1229
1230         /* XXX calculate priority so drivers can find the tx queue */
1231         M_WME_SETAC(mcopy, WME_AC_BE);
1232
1233         /* XXX do we know m_nextpkt is NULL? */
1234         mcopy->m_pkthdr.rcvif = (void *) ni;
1235
1236         /*
1237          * XXX this bypasses all of the VAP TX handling; it passes frames
1238          * directly to the parent interface.
1239          *
1240          * Because of this, there's no TX lock being held as there's no
1241          * encaps state being used.
1242          *
1243          * Doing a direct parent transmit may not be the correct thing
1244          * to do here; we'll have to re-think this soon.
1245          */
1246         IEEE80211_TX_LOCK(ic);
1247         err = ieee80211_parent_xmitpkt(ic, mcopy);
1248         IEEE80211_TX_UNLOCK(ic);
1249         if (err != 0) {
1250                 /* NB: IFQ_HANDOFF reclaims mbuf */
1251                 ieee80211_free_node(ni);
1252         } else {
1253                 ifp->if_opackets++;
1254         }
1255 }
1256
1257 static struct mbuf *
1258 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1259 {
1260 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1261 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1262         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1263                   sizeof(struct ieee80211_meshcntl_ae10)];
1264         const struct ieee80211_qosframe_addr4 *wh;
1265         const struct ieee80211_meshcntl_ae10 *mc;
1266         struct ether_header *eh;
1267         struct llc *llc;
1268         int ae;
1269
1270         if (m->m_len < hdrlen + sizeof(*llc) &&
1271             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1272                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1273                     "discard data frame: %s", "m_pullup failed");
1274                 vap->iv_stats.is_rx_tooshort++;
1275                 return NULL;
1276         }
1277         memcpy(b, mtod(m, caddr_t), hdrlen);
1278         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1279         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1280         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1281                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1282             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1283
1284         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1285         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1286             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1287             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1288             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1289             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1290               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1291                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1292                 llc = NULL;
1293         } else {
1294                 m_adj(m, hdrlen - sizeof(*eh));
1295         }
1296         eh = mtod(m, struct ether_header *);
1297         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1298         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1299                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1300                 if (ae == IEEE80211_MESH_AE_00) {
1301                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1302                 } else if (ae == IEEE80211_MESH_AE_01) {
1303                         IEEE80211_ADDR_COPY(eh->ether_shost,
1304                             MC01(mc)->mc_addr4);
1305                 } else {
1306                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1307                             (const struct ieee80211_frame *)wh, NULL,
1308                             "bad AE %d", ae);
1309                         vap->iv_stats.is_mesh_badae++;
1310                         m_freem(m);
1311                         return NULL;
1312                 }
1313         } else {
1314                 if (ae == IEEE80211_MESH_AE_00) {
1315                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1316                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1317                 } else if (ae == IEEE80211_MESH_AE_10) {
1318                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1319                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1320                 } else {
1321                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1322                             (const struct ieee80211_frame *)wh, NULL,
1323                             "bad AE %d", ae);
1324                         vap->iv_stats.is_mesh_badae++;
1325                         m_freem(m);
1326                         return NULL;
1327                 }
1328         }
1329 #ifndef __NO_STRICT_ALIGNMENT
1330         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1331                 m = ieee80211_realign(vap, m, sizeof(*eh));
1332                 if (m == NULL)
1333                         return NULL;
1334         }
1335 #endif /* !__NO_STRICT_ALIGNMENT */
1336         if (llc != NULL) {
1337                 eh = mtod(m, struct ether_header *);
1338                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1339         }
1340         return m;
1341 #undef  WDIR
1342 #undef  MC01
1343 }
1344
1345 /*
1346  * Return non-zero if the unicast mesh data frame should be processed
1347  * locally.  Frames that are not proxy'd have our address, otherwise
1348  * we need to consult the routing table to look for a proxy entry.
1349  */
1350 static __inline int
1351 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1352     const struct ieee80211_meshcntl *mc)
1353 {
1354         int ae = mc->mc_flags & 3;
1355
1356         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1357             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1358         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1359             ("bad AE %d", ae));
1360         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
1361                 const struct ieee80211_meshcntl_ae10 *mc10 =
1362                     (const struct ieee80211_meshcntl_ae10 *) mc;
1363                 struct ieee80211_mesh_route *rt =
1364                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1365                 /* check for proxy route to ourself */
1366                 return (rt != NULL &&
1367                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1368         } else                                  /* ucast w/o proxy */
1369                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1370 }
1371
1372 /*
1373  * Verifies transmitter, updates lifetime, precursor list and forwards data.
1374  * > 0 means we have forwarded data and no need to process locally
1375  * == 0 means we want to process locally (and we may have forwarded data
1376  * < 0 means there was an error and data should be discarded
1377  */
1378 static int
1379 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1380     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1381 {
1382         struct ieee80211_qosframe_addr4 *qwh;
1383         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1384         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1385
1386         /* This is called from the RX path - don't hold this lock */
1387         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1388
1389         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1390
1391         /*
1392          * TODO:
1393          * o verify addr2 is  a legitimate transmitter
1394          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1395          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1396          */
1397
1398         /* set lifetime of addr3 (meshDA) to initial value */
1399         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1400         if (rt_meshda == NULL) {
1401                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1402                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
1403                 /*
1404                  * [Optional] any of the following three actions:
1405                  * o silently discard                           [X]
1406                  * o trigger a path discovery                   [ ]
1407                  * o inform TA that meshDA is unknown.          [ ]
1408                  */
1409                 /* XXX: stats */
1410                 return (-1);
1411         }
1412
1413         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1414             ms->ms_ppath->mpp_inact));
1415
1416         /* set lifetime of addr4 (meshSA) to initial value */
1417         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1418         KASSERT(rt_meshsa != NULL, ("no route"));
1419         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1420             ms->ms_ppath->mpp_inact));
1421
1422         mesh_forward(vap, m, mc);
1423         return (1); /* dont process locally */
1424 }
1425
1426 /*
1427  * Verifies transmitter, updates lifetime, precursor list and process data
1428  * locally, if data is proxy with AE = 10 it could mean data should go
1429  * on another mesh path or data should be forwarded to the DS.
1430  *
1431  * > 0 means we have forwarded data and no need to process locally
1432  * == 0 means we want to process locally (and we may have forwarded data
1433  * < 0 means there was an error and data should be discarded
1434  */
1435 static int
1436 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1437     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1438 {
1439         struct ieee80211_qosframe_addr4 *qwh;
1440         const struct ieee80211_meshcntl_ae10 *mc10;
1441         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1442         struct ieee80211_mesh_route *rt;
1443         int ae;
1444
1445         /* This is called from the RX path - don't hold this lock */
1446         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1447
1448         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1449         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1450
1451         /*
1452          * TODO:
1453          * o verify addr2 is  a legitimate transmitter
1454          * o lifetime of precursor entry is max(init, curr)
1455          */
1456
1457         /* set lifetime of addr4 (meshSA) to initial value */
1458         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1459         KASSERT(rt != NULL, ("no route"));
1460         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1461         rt = NULL;
1462
1463         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1464         KASSERT(ae == IEEE80211_MESH_AE_00 ||
1465             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1466         if (ae == IEEE80211_MESH_AE_10) {
1467                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1468                         return (0); /* process locally */
1469                 }
1470
1471                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1472                 if (rt != NULL &&
1473                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1474                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1475                         /*
1476                          * Forward on another mesh-path, according to
1477                          * amendment as specified in 9.32.4.1
1478                          */
1479                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1480                         mesh_forward(vap, m,
1481                             (const struct ieee80211_meshcntl *)mc10);
1482                         return (1); /* dont process locally */
1483                 }
1484                 /*
1485                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
1486                  * addressed according to 13.11.3.2.
1487                  */
1488                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1489                     "forward frame to DS, SA(%6D) DA(%6D)",
1490                     mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1491         }
1492         return (0); /* process locally */
1493 }
1494
1495 /*
1496  * Try to forward the group addressed data on to other mesh STAs, and
1497  * also to the DS.
1498  *
1499  * > 0 means we have forwarded data and no need to process locally
1500  * == 0 means we want to process locally (and we may have forwarded data
1501  * < 0 means there was an error and data should be discarded
1502  */
1503 static int
1504 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1505     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1506 {
1507 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1508         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1509
1510         /* This is called from the RX path - don't hold this lock */
1511         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1512
1513         mesh_forward(vap, m, mc);
1514
1515         if(mc->mc_ttl > 0) {
1516                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1517                         /*
1518                          * Forward of MSDUs from the MBSS to DS group addressed
1519                          * (according to 13.11.3.2)
1520                          * This happens by delivering the packet, and a bridge
1521                          * will sent it on another port member.
1522                          */
1523                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1524                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
1525                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1526                                     MC01(mc)->mc_addr4, "%s",
1527                                     "forward from MBSS to the DS");
1528                 }
1529         }
1530         return (0); /* process locally */
1531 #undef  MC01
1532 }
1533
1534 static int
1535 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
1536 {
1537 #define HAS_SEQ(type)   ((type & 0x4) == 0)
1538 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1539 #define MC10(mc)        ((const struct ieee80211_meshcntl_ae10 *)mc)
1540         struct ieee80211vap *vap = ni->ni_vap;
1541         struct ieee80211com *ic = ni->ni_ic;
1542         struct ifnet *ifp = vap->iv_ifp;
1543         struct ieee80211_frame *wh;
1544         const struct ieee80211_meshcntl *mc;
1545         int hdrspace, meshdrlen, need_tap, error;
1546         uint8_t dir, type, subtype, ae;
1547         uint32_t seq;
1548         const uint8_t *addr;
1549         uint8_t qos[2];
1550         ieee80211_seq rxseq;
1551
1552         KASSERT(ni != NULL, ("null node"));
1553         ni->ni_inact = ni->ni_inact_reload;
1554
1555         need_tap = 1;                   /* mbuf need to be tapped. */
1556         type = -1;                      /* undefined */
1557
1558         /* This is called from the RX path - don't hold this lock */
1559         IEEE80211_TX_UNLOCK_ASSERT(ic);
1560
1561         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1562                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1563                     ni->ni_macaddr, NULL,
1564                     "too short (1): len %u", m->m_pkthdr.len);
1565                 vap->iv_stats.is_rx_tooshort++;
1566                 goto out;
1567         }
1568         /*
1569          * Bit of a cheat here, we use a pointer for a 3-address
1570          * frame format but don't reference fields past outside
1571          * ieee80211_frame_min w/o first validating the data is
1572          * present.
1573         */
1574         wh = mtod(m, struct ieee80211_frame *);
1575
1576         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1577             IEEE80211_FC0_VERSION_0) {
1578                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1579                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1580                 vap->iv_stats.is_rx_badversion++;
1581                 goto err;
1582         }
1583         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1584         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1585         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1586         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1587                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1588                 ni->ni_noise = nf;
1589                 if (HAS_SEQ(type)) {
1590                         uint8_t tid = ieee80211_gettid(wh);
1591
1592                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
1593                             TID_TO_WME_AC(tid) >= WME_AC_VI)
1594                                 ic->ic_wme.wme_hipri_traffic++;
1595                         rxseq = le16toh(*(uint16_t *)wh->i_seq);
1596                         if (! ieee80211_check_rxseq(ni, wh)) {
1597                                 /* duplicate, discard */
1598                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1599                                     wh->i_addr1, "duplicate",
1600                                     "seqno <%u,%u> fragno <%u,%u> tid %u",
1601                                     rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
1602                                     ni->ni_rxseqs[tid] >>
1603                                     IEEE80211_SEQ_SEQ_SHIFT,
1604                                     rxseq & IEEE80211_SEQ_FRAG_MASK,
1605                                     ni->ni_rxseqs[tid] &
1606                                     IEEE80211_SEQ_FRAG_MASK,
1607                                     tid);
1608                                 vap->iv_stats.is_rx_dup++;
1609                                 IEEE80211_NODE_STAT(ni, rx_dup);
1610                                 goto out;
1611                         }
1612                         ni->ni_rxseqs[tid] = rxseq;
1613                 }
1614         }
1615 #ifdef IEEE80211_DEBUG
1616         /*
1617          * It's easier, but too expensive, to simulate different mesh
1618          * topologies by consulting the ACL policy very early, so do this
1619          * only under DEBUG.
1620          *
1621          * NB: this check is also done upon peering link initiation.
1622          */
1623         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1624                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1625                     wh, NULL, "%s", "disallowed by ACL");
1626                 vap->iv_stats.is_rx_acl++;
1627                 goto out;
1628         }
1629 #endif
1630         switch (type) {
1631         case IEEE80211_FC0_TYPE_DATA:
1632                 if (ni == vap->iv_bss)
1633                         goto out;
1634                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1635                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1636                             ni->ni_macaddr, NULL,
1637                             "peer link not yet established (%d)",
1638                             ni->ni_mlstate);
1639                         vap->iv_stats.is_mesh_nolink++;
1640                         goto out;
1641                 }
1642                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1643                     dir != IEEE80211_FC1_DIR_DSTODS) {
1644                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1645                             wh, "data", "incorrect dir 0x%x", dir);
1646                         vap->iv_stats.is_rx_wrongdir++;
1647                         goto err;
1648                 }
1649
1650                 /* All Mesh data frames are QoS subtype */
1651                 if (!HAS_SEQ(type)) {
1652                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1653                             wh, "data", "incorrect subtype 0x%x", subtype);
1654                         vap->iv_stats.is_rx_badsubtype++;
1655                         goto err;
1656                 }
1657
1658                 /*
1659                  * Next up, any fragmentation.
1660                  * XXX: we defrag before we even try to forward,
1661                  * Mesh Control field is not present in sub-sequent
1662                  * fragmented frames. This is in contrast to Draft 4.0.
1663                  */
1664                 hdrspace = ieee80211_hdrspace(ic, wh);
1665                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1666                         m = ieee80211_defrag(ni, m, hdrspace);
1667                         if (m == NULL) {
1668                                 /* Fragment dropped or frame not complete yet */
1669                                 goto out;
1670                         }
1671                 }
1672                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1673
1674                 /*
1675                  * Now we have a complete Mesh Data frame.
1676                  */
1677
1678                 /*
1679                  * Only fromDStoDS data frames use 4 address qos frames
1680                  * as specified in amendment. Otherwise addr4 is located
1681                  * in the Mesh Control field and a 3 address qos frame
1682                  * is used.
1683                  */
1684                 if (IEEE80211_IS_DSTODS(wh))
1685                         *(uint16_t *)qos = *(uint16_t *)
1686                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos;
1687                 else
1688                         *(uint16_t *)qos = *(uint16_t *)
1689                             ((struct ieee80211_qosframe *)wh)->i_qos;
1690
1691                 /*
1692                  * NB: The mesh STA sets the Mesh Control Present
1693                  * subfield to 1 in the Mesh Data frame containing
1694                  * an unfragmented MSDU, an A-MSDU, or the first
1695                  * fragment of an MSDU.
1696                  * After defrag it should always be present.
1697                  */
1698                 if (!(qos[1] & IEEE80211_QOS_MC)) {
1699                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1700                             ni->ni_macaddr, NULL,
1701                             "%s", "Mesh control field not present");
1702                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1703                         goto err;
1704                 }
1705
1706                 /* pull up enough to get to the mesh control */
1707                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1708                     (m = m_pullup(m, hdrspace +
1709                         sizeof(struct ieee80211_meshcntl))) == NULL) {
1710                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1711                             ni->ni_macaddr, NULL,
1712                             "data too short: expecting %u", hdrspace);
1713                         vap->iv_stats.is_rx_tooshort++;
1714                         goto out;               /* XXX */
1715                 }
1716                 /*
1717                  * Now calculate the full extent of the headers. Note
1718                  * mesh_decap will pull up anything we didn't get
1719                  * above when it strips the 802.11 headers.
1720                  */
1721                 mc = (const struct ieee80211_meshcntl *)
1722                     (mtod(m, const uint8_t *) + hdrspace);
1723                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1724                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1725                     ae * IEEE80211_ADDR_LEN;
1726                 hdrspace += meshdrlen;
1727
1728                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1729                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1730                     (m->m_len < hdrspace) &&
1731                     ((m = m_pullup(m, hdrspace)) == NULL)) {
1732                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1733                             ni->ni_macaddr, NULL,
1734                             "data too short: expecting %u", hdrspace);
1735                         vap->iv_stats.is_rx_tooshort++;
1736                         goto out;               /* XXX */
1737                 }
1738                 /* XXX: are we sure there is no reallocating after m_pullup? */
1739
1740                 seq = LE_READ_4(mc->mc_seq);
1741                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1742                         addr = wh->i_addr3;
1743                 else if (ae == IEEE80211_MESH_AE_01)
1744                         addr = MC01(mc)->mc_addr4;
1745                 else
1746                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1747                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1748                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1749                             addr, "data", "%s", "not to me");
1750                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1751                         goto out;
1752                 }
1753                 if (mesh_checkpseq(vap, addr, seq) != 0) {
1754                         vap->iv_stats.is_rx_dup++;
1755                         goto out;
1756                 }
1757
1758                 /* This code "routes" the frame to the right control path */
1759                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1760                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1761                                 error =
1762                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1763                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1764                                 error = mesh_recv_group_data(vap, m, wh, mc);
1765                         else
1766                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1767                                     wh, mc);
1768                 } else
1769                         error = mesh_recv_group_data(vap, m, wh, mc);
1770                 if (error < 0)
1771                         goto err;
1772                 else if (error > 0)
1773                         goto out;
1774
1775                 if (ieee80211_radiotap_active_vap(vap))
1776                         ieee80211_radiotap_rx(vap, m);
1777                 need_tap = 0;
1778
1779                 /*
1780                  * Finally, strip the 802.11 header.
1781                  */
1782                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1783                 if (m == NULL) {
1784                         /* XXX mask bit to check for both */
1785                         /* don't count Null data frames as errors */
1786                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1787                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1788                                 goto out;
1789                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1790                             ni->ni_macaddr, "data", "%s", "decap error");
1791                         vap->iv_stats.is_rx_decap++;
1792                         IEEE80211_NODE_STAT(ni, rx_decap);
1793                         goto err;
1794                 }
1795                 if (qos[0] & IEEE80211_QOS_AMSDU) {
1796                         m = ieee80211_decap_amsdu(ni, m);
1797                         if (m == NULL)
1798                                 return IEEE80211_FC0_TYPE_DATA;
1799                 }
1800                 ieee80211_deliver_data(vap, ni, m);
1801                 return type;
1802         case IEEE80211_FC0_TYPE_MGT:
1803                 vap->iv_stats.is_rx_mgmt++;
1804                 IEEE80211_NODE_STAT(ni, rx_mgmt);
1805                 if (dir != IEEE80211_FC1_DIR_NODS) {
1806                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1807                             wh, "mgt", "incorrect dir 0x%x", dir);
1808                         vap->iv_stats.is_rx_wrongdir++;
1809                         goto err;
1810                 }
1811                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1812                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1813                             ni->ni_macaddr, "mgt", "too short: len %u",
1814                             m->m_pkthdr.len);
1815                         vap->iv_stats.is_rx_tooshort++;
1816                         goto out;
1817                 }
1818 #ifdef IEEE80211_DEBUG
1819                 if ((ieee80211_msg_debug(vap) &&
1820                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1821                     ieee80211_msg_dumppkts(vap)) {
1822                         if_printf(ifp, "received %s from %s rssi %d\n",
1823                             ieee80211_mgt_subtype_name[subtype >>
1824                             IEEE80211_FC0_SUBTYPE_SHIFT],
1825                             ether_sprintf(wh->i_addr2), rssi);
1826                 }
1827 #endif
1828                 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1829                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1830                             wh, NULL, "%s", "WEP set but not permitted");
1831                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1832                         goto out;
1833                 }
1834                 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
1835                 goto out;
1836         case IEEE80211_FC0_TYPE_CTL:
1837                 vap->iv_stats.is_rx_ctl++;
1838                 IEEE80211_NODE_STAT(ni, rx_ctrl);
1839                 goto out;
1840         default:
1841                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1842                     wh, "bad", "frame type 0x%x", type);
1843                 /* should not come here */
1844                 break;
1845         }
1846 err:
1847         ifp->if_ierrors++;
1848 out:
1849         if (m != NULL) {
1850                 if (need_tap && ieee80211_radiotap_active_vap(vap))
1851                         ieee80211_radiotap_rx(vap, m);
1852                 m_freem(m);
1853         }
1854         return type;
1855 #undef  HAS_SEQ
1856 #undef  MC01
1857 #undef  MC10
1858 }
1859
1860 static void
1861 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1862     int rssi, int nf)
1863 {
1864         struct ieee80211vap *vap = ni->ni_vap;
1865         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1866         struct ieee80211com *ic = ni->ni_ic;
1867         struct ieee80211_frame *wh;
1868         struct ieee80211_mesh_route *rt;
1869         uint8_t *frm, *efrm;
1870
1871         wh = mtod(m0, struct ieee80211_frame *);
1872         frm = (uint8_t *)&wh[1];
1873         efrm = mtod(m0, uint8_t *) + m0->m_len;
1874         switch (subtype) {
1875         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1876         case IEEE80211_FC0_SUBTYPE_BEACON:
1877         {
1878                 struct ieee80211_scanparams scan;
1879                 /*
1880                  * We process beacon/probe response
1881                  * frames to discover neighbors.
1882                  */
1883                 if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
1884                         return;
1885                 /*
1886                  * Count frame now that we know it's to be processed.
1887                  */
1888                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1889                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
1890                         IEEE80211_NODE_STAT(ni, rx_beacons);
1891                 } else
1892                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1893                 /*
1894                  * If scanning, just pass information to the scan module.
1895                  */
1896                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1897                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1898                                 /*
1899                                  * Actively scanning a channel marked passive;
1900                                  * send a probe request now that we know there
1901                                  * is 802.11 traffic present.
1902                                  *
1903                                  * XXX check if the beacon we recv'd gives
1904                                  * us what we need and suppress the probe req
1905                                  */
1906                                 ieee80211_probe_curchan(vap, 1);
1907                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1908                         }
1909                         ieee80211_add_scan(vap, &scan, wh,
1910                             subtype, rssi, nf);
1911                         return;
1912                 }
1913
1914                 /* The rest of this code assumes we are running */
1915                 if (vap->iv_state != IEEE80211_S_RUN)
1916                         return;
1917                 /*
1918                  * Ignore non-mesh STAs.
1919                  */
1920                 if ((scan.capinfo &
1921                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1922                     scan.meshid == NULL || scan.meshconf == NULL) {
1923                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1924                             wh, "beacon", "%s", "not a mesh sta");
1925                         vap->iv_stats.is_mesh_wrongmesh++;
1926                         return;
1927                 }
1928                 /*
1929                  * Ignore STAs for other mesh networks.
1930                  */
1931                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1932                     mesh_verify_meshconf(vap, scan.meshconf)) {
1933                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1934                             wh, "beacon", "%s", "not for our mesh");
1935                         vap->iv_stats.is_mesh_wrongmesh++;
1936                         return;
1937                 }
1938                 /*
1939                  * Peer only based on the current ACL policy.
1940                  */
1941                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1942                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1943                             wh, NULL, "%s", "disallowed by ACL");
1944                         vap->iv_stats.is_rx_acl++;
1945                         return;
1946                 }
1947                 /*
1948                  * Do neighbor discovery.
1949                  */
1950                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1951                         /*
1952                          * Create a new entry in the neighbor table.
1953                          */
1954                         ni = ieee80211_add_neighbor(vap, wh, &scan);
1955                 }
1956                 /*
1957                  * Automatically peer with discovered nodes if possible.
1958                  */
1959                 if (ni != vap->iv_bss &&
1960                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1961                         switch (ni->ni_mlstate) {
1962                         case IEEE80211_NODE_MESH_IDLE:
1963                         {
1964                                 uint16_t args[1];
1965
1966                                 /* Wait for backoff callout to reset counter */
1967                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1968                                         return;
1969
1970                                 ni->ni_mlpid = mesh_generateid(vap);
1971                                 if (ni->ni_mlpid == 0)
1972                                         return;
1973                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1974                                 args[0] = ni->ni_mlpid;
1975                                 ieee80211_send_action(ni,
1976                                 IEEE80211_ACTION_CAT_SELF_PROT,
1977                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1978                                 ni->ni_mlrcnt = 0;
1979                                 mesh_peer_timeout_setup(ni);
1980                                 break;
1981                         }
1982                         case IEEE80211_NODE_MESH_ESTABLISHED:
1983                         {
1984                                 /*
1985                                  * Valid beacon from a peer mesh STA
1986                                  * bump TA lifetime
1987                                  */
1988                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1989                                 if(rt != NULL) {
1990                                         ieee80211_mesh_rt_update(rt,
1991                                             ticks_to_msecs(
1992                                             ms->ms_ppath->mpp_inact));
1993                                 }
1994                                 break;
1995                         }
1996                         default:
1997                                 break; /* ignore */
1998                         }
1999                 }
2000                 break;
2001         }
2002         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
2003         {
2004                 uint8_t *ssid, *meshid, *rates, *xrates;
2005                 uint8_t *sfrm;
2006
2007                 if (vap->iv_state != IEEE80211_S_RUN) {
2008                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2009                             wh, NULL, "wrong state %s",
2010                             ieee80211_state_name[vap->iv_state]);
2011                         vap->iv_stats.is_rx_mgtdiscard++;
2012                         return;
2013                 }
2014                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
2015                         /* frame must be directed */
2016                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2017                             wh, NULL, "%s", "not unicast");
2018                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
2019                         return;
2020                 }
2021                 /*
2022                  * prreq frame format
2023                  *      [tlv] ssid
2024                  *      [tlv] supported rates
2025                  *      [tlv] extended supported rates
2026                  *      [tlv] mesh id
2027                  */
2028                 ssid = meshid = rates = xrates = NULL;
2029                 sfrm = frm;
2030                 while (efrm - frm > 1) {
2031                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2032                         switch (*frm) {
2033                         case IEEE80211_ELEMID_SSID:
2034                                 ssid = frm;
2035                                 break;
2036                         case IEEE80211_ELEMID_RATES:
2037                                 rates = frm;
2038                                 break;
2039                         case IEEE80211_ELEMID_XRATES:
2040                                 xrates = frm;
2041                                 break;
2042                         case IEEE80211_ELEMID_MESHID:
2043                                 meshid = frm;
2044                                 break;
2045                         }
2046                         frm += frm[1] + 2;
2047                 }
2048                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2049                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2050                 if (xrates != NULL)
2051                         IEEE80211_VERIFY_ELEMENT(xrates,
2052                             IEEE80211_RATE_MAXSIZE - rates[1], return);
2053                 if (meshid != NULL) {
2054                         IEEE80211_VERIFY_ELEMENT(meshid,
2055                             IEEE80211_MESHID_LEN, return);
2056                         /* NB: meshid, not ssid */
2057                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2058                 }
2059
2060                 /* XXX find a better class or define it's own */
2061                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2062                     "%s", "recv probe req");
2063                 /*
2064                  * Some legacy 11b clients cannot hack a complete
2065                  * probe response frame.  When the request includes
2066                  * only a bare-bones rate set, communicate this to
2067                  * the transmit side.
2068                  */
2069                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2070                 break;
2071         }
2072
2073         case IEEE80211_FC0_SUBTYPE_ACTION:
2074         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2075                 if (ni == vap->iv_bss) {
2076                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2077                             wh, NULL, "%s", "unknown node");
2078                         vap->iv_stats.is_rx_mgtdiscard++;
2079                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2080                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2081                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2082                             wh, NULL, "%s", "not for us");
2083                         vap->iv_stats.is_rx_mgtdiscard++;
2084                 } else if (vap->iv_state != IEEE80211_S_RUN) {
2085                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2086                             wh, NULL, "wrong state %s",
2087                             ieee80211_state_name[vap->iv_state]);
2088                         vap->iv_stats.is_rx_mgtdiscard++;
2089                 } else {
2090                         if (ieee80211_parse_action(ni, m0) == 0)
2091                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2092                 }
2093                 break;
2094
2095         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2096         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2097         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2098         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2099         case IEEE80211_FC0_SUBTYPE_ATIM:
2100         case IEEE80211_FC0_SUBTYPE_DISASSOC:
2101         case IEEE80211_FC0_SUBTYPE_AUTH:
2102         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2103                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2104                     wh, NULL, "%s", "not handled");
2105                 vap->iv_stats.is_rx_mgtdiscard++;
2106                 break;
2107
2108         default:
2109                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2110                     wh, "mgt", "subtype 0x%x not handled", subtype);
2111                 vap->iv_stats.is_rx_badsubtype++;
2112                 break;
2113         }
2114 }
2115
2116 static void
2117 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2118 {
2119
2120         switch (subtype) {
2121         case IEEE80211_FC0_SUBTYPE_BAR:
2122                 ieee80211_recv_bar(ni, m);
2123                 break;
2124         }
2125 }
2126
2127 /*
2128  * Parse meshpeering action ie's for MPM frames
2129  */
2130 static const struct ieee80211_meshpeer_ie *
2131 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2132         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
2133         const uint8_t *frm, const uint8_t *efrm,
2134         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2135 {
2136         struct ieee80211vap *vap = ni->ni_vap;
2137         const struct ieee80211_meshpeer_ie *mpie;
2138         uint16_t args[3];
2139         const uint8_t *meshid, *meshconf, *meshpeer;
2140         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2141
2142         meshid = meshconf = meshpeer = NULL;
2143         while (efrm - frm > 1) {
2144                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2145                 switch (*frm) {
2146                 case IEEE80211_ELEMID_MESHID:
2147                         meshid = frm;
2148                         break;
2149                 case IEEE80211_ELEMID_MESHCONF:
2150                         meshconf = frm;
2151                         break;
2152                 case IEEE80211_ELEMID_MESHPEER:
2153                         meshpeer = frm;
2154                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
2155                         memset(mp, 0, sizeof(*mp));
2156                         mp->peer_len = mpie->peer_len;
2157                         mp->peer_proto = LE_READ_2(&mpie->peer_proto);
2158                         mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid);
2159                         switch (subtype) {
2160                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2161                                 mp->peer_linkid =
2162                                     LE_READ_2(&mpie->peer_linkid);
2163                                 break;
2164                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
2165                                 /* NB: peer link ID is optional */
2166                                 if (mpie->peer_len ==
2167                                     (IEEE80211_MPM_BASE_SZ + 2)) {
2168                                         mp->peer_linkid = 0;
2169                                         mp->peer_rcode =
2170                                             LE_READ_2(&mpie->peer_linkid);
2171                                 } else {
2172                                         mp->peer_linkid =
2173                                             LE_READ_2(&mpie->peer_linkid);
2174                                         mp->peer_rcode =
2175                                             LE_READ_2(&mpie->peer_rcode);
2176                                 }
2177                                 break;
2178                         }
2179                         break;
2180                 }
2181                 frm += frm[1] + 2;
2182         }
2183
2184         /*
2185          * Verify the contents of the frame.
2186          * If it fails validation, close the peer link.
2187          */
2188         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2189                 sendclose = 1;
2190                 IEEE80211_DISCARD(vap,
2191                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2192                     wh, NULL, "%s", "MPM validation failed");
2193         }
2194
2195         /* If meshid is not the same reject any frames type. */
2196         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2197                 sendclose = 1;
2198                 IEEE80211_DISCARD(vap,
2199                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2200                     wh, NULL, "%s", "not for our mesh");
2201                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2202                         /*
2203                          * Standard not clear about this, if we dont ignore
2204                          * there will be an endless loop between nodes sending
2205                          * CLOSE frames between each other with wrong meshid.
2206                          * Discard and timers will bring FSM to IDLE state.
2207                          */
2208                         return NULL;
2209                 }
2210         }
2211
2212         /*
2213          * Close frames are accepted if meshid is the same.
2214          * Verify the other two types.
2215          */
2216         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2217             mesh_verify_meshconf(vap, meshconf)) {
2218                 sendclose = 1;
2219                 IEEE80211_DISCARD(vap,
2220                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2221                     wh, NULL, "%s", "configuration missmatch");
2222         }
2223
2224         if (sendclose) {
2225                 vap->iv_stats.is_rx_mgtdiscard++;
2226                 switch (ni->ni_mlstate) {
2227                 case IEEE80211_NODE_MESH_IDLE:
2228                 case IEEE80211_NODE_MESH_ESTABLISHED:
2229                 case IEEE80211_NODE_MESH_HOLDING:
2230                         /* ignore */
2231                         break;
2232                 case IEEE80211_NODE_MESH_OPENSNT:
2233                 case IEEE80211_NODE_MESH_OPENRCV:
2234                 case IEEE80211_NODE_MESH_CONFIRMRCV:
2235                         args[0] = ni->ni_mlpid;
2236                         args[1] = ni->ni_mllid;
2237                         /* Reason codes for rejection */
2238                         switch (subtype) {
2239                         case IEEE80211_ACTION_MESHPEERING_OPEN:
2240                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2241                                 break;
2242                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2243                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2244                                 break;
2245                         }
2246                         ieee80211_send_action(ni,
2247                             IEEE80211_ACTION_CAT_SELF_PROT,
2248                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2249                             args);
2250                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2251                         mesh_peer_timeout_setup(ni);
2252                         break;
2253                 }
2254                 return NULL;
2255         }
2256
2257         return (const struct ieee80211_meshpeer_ie *) mp;
2258 }
2259
2260 static int
2261 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2262         const struct ieee80211_frame *wh,
2263         const uint8_t *frm, const uint8_t *efrm)
2264 {
2265         struct ieee80211vap *vap = ni->ni_vap;
2266         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2267         struct ieee80211_meshpeer_ie ie;
2268         const struct ieee80211_meshpeer_ie *meshpeer;
2269         uint16_t args[3];
2270
2271         /* +2+2 for action + code + capabilites */
2272         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2273             IEEE80211_ACTION_MESHPEERING_OPEN);
2274         if (meshpeer == NULL) {
2275                 return 0;
2276         }
2277
2278         /* XXX move up */
2279         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2280             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2281
2282         switch (ni->ni_mlstate) {
2283         case IEEE80211_NODE_MESH_IDLE:
2284                 /* Reject open request if reached our maximum neighbor count */
2285                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2286                         args[0] = meshpeer->peer_llinkid;
2287                         args[1] = 0;
2288                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2289                         ieee80211_send_action(ni,
2290                             IEEE80211_ACTION_CAT_SELF_PROT,
2291                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2292                             args);
2293                         /* stay in IDLE state */
2294                         return (0);
2295                 }
2296                 /* Open frame accepted */
2297                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2298                 ni->ni_mllid = meshpeer->peer_llinkid;
2299                 ni->ni_mlpid = mesh_generateid(vap);
2300                 if (ni->ni_mlpid == 0)
2301                         return 0;               /* XXX */
2302                 args[0] = ni->ni_mlpid;
2303                 /* Announce we're open too... */
2304                 ieee80211_send_action(ni,
2305                     IEEE80211_ACTION_CAT_SELF_PROT,
2306                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
2307                 /* ...and confirm the link. */
2308                 args[0] = ni->ni_mlpid;
2309                 args[1] = ni->ni_mllid;
2310                 ieee80211_send_action(ni,
2311                     IEEE80211_ACTION_CAT_SELF_PROT,
2312                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2313                     args);
2314                 mesh_peer_timeout_setup(ni);
2315                 break;
2316         case IEEE80211_NODE_MESH_OPENRCV:
2317                 /* Wrong Link ID */
2318                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2319                         args[0] = ni->ni_mllid;
2320                         args[1] = ni->ni_mlpid;
2321                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2322                         ieee80211_send_action(ni,
2323                             IEEE80211_ACTION_CAT_SELF_PROT,
2324                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2325                             args);
2326                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2327                         mesh_peer_timeout_setup(ni);
2328                         break;
2329                 }
2330                 /* Duplicate open, confirm again. */
2331                 args[0] = ni->ni_mlpid;
2332                 args[1] = ni->ni_mllid;
2333                 ieee80211_send_action(ni,
2334                     IEEE80211_ACTION_CAT_SELF_PROT,
2335                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2336                     args);
2337                 break;
2338         case IEEE80211_NODE_MESH_OPENSNT:
2339                 ni->ni_mllid = meshpeer->peer_llinkid;
2340                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2341                 args[0] = ni->ni_mlpid;
2342                 args[1] = ni->ni_mllid;
2343                 ieee80211_send_action(ni,
2344                     IEEE80211_ACTION_CAT_SELF_PROT,
2345                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2346                     args);
2347                 /* NB: don't setup/clear any timeout */
2348                 break;
2349         case IEEE80211_NODE_MESH_CONFIRMRCV:
2350                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2351                     ni->ni_mllid != meshpeer->peer_llinkid) {
2352                         args[0] = ni->ni_mlpid;
2353                         args[1] = ni->ni_mllid;
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,
2360                             IEEE80211_NODE_MESH_HOLDING);
2361                         mesh_peer_timeout_setup(ni);
2362                         break;
2363                 }
2364                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2365                 ni->ni_mllid = meshpeer->peer_llinkid;
2366                 args[0] = ni->ni_mlpid;
2367                 args[1] = ni->ni_mllid;
2368                 ieee80211_send_action(ni,
2369                     IEEE80211_ACTION_CAT_SELF_PROT,
2370                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2371                     args);
2372                 mesh_peer_timeout_stop(ni);
2373                 break;
2374         case IEEE80211_NODE_MESH_ESTABLISHED:
2375                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2376                         args[0] = ni->ni_mllid;
2377                         args[1] = ni->ni_mlpid;
2378                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2379                         ieee80211_send_action(ni,
2380                             IEEE80211_ACTION_CAT_SELF_PROT,
2381                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2382                             args);
2383                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2384                         mesh_peer_timeout_setup(ni);
2385                         break;
2386                 }
2387                 args[0] = ni->ni_mlpid;
2388                 args[1] = ni->ni_mllid;
2389                 ieee80211_send_action(ni,
2390                     IEEE80211_ACTION_CAT_SELF_PROT,
2391                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2392                     args);
2393                 break;
2394         case IEEE80211_NODE_MESH_HOLDING:
2395                 args[0] = ni->ni_mlpid;
2396                 args[1] = meshpeer->peer_llinkid;
2397                 /* Standard not clear about what the reaason code should be */
2398                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2399                 ieee80211_send_action(ni,
2400                     IEEE80211_ACTION_CAT_SELF_PROT,
2401                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2402                     args);
2403                 break;
2404         }
2405         return 0;
2406 }
2407
2408 static int
2409 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2410         const struct ieee80211_frame *wh,
2411         const uint8_t *frm, const uint8_t *efrm)
2412 {
2413         struct ieee80211vap *vap = ni->ni_vap;
2414         struct ieee80211_meshpeer_ie ie;
2415         const struct ieee80211_meshpeer_ie *meshpeer;
2416         uint16_t args[3];
2417
2418         /* +2+2+2+2 for action + code + capabilites + status code + AID */
2419         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2420             IEEE80211_ACTION_MESHPEERING_CONFIRM);
2421         if (meshpeer == NULL) {
2422                 return 0;
2423         }
2424
2425         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2426             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2427             meshpeer->peer_llinkid, meshpeer->peer_linkid);
2428
2429         switch (ni->ni_mlstate) {
2430         case IEEE80211_NODE_MESH_OPENRCV:
2431                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2432                 mesh_peer_timeout_stop(ni);
2433                 break;
2434         case IEEE80211_NODE_MESH_OPENSNT:
2435                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2436                 mesh_peer_timeout_setup(ni);
2437                 break;
2438         case IEEE80211_NODE_MESH_HOLDING:
2439                 args[0] = ni->ni_mlpid;
2440                 args[1] = meshpeer->peer_llinkid;
2441                 /* Standard not clear about what the reaason code should be */
2442                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2443                 ieee80211_send_action(ni,
2444                     IEEE80211_ACTION_CAT_SELF_PROT,
2445                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2446                     args);
2447                 break;
2448         case IEEE80211_NODE_MESH_CONFIRMRCV:
2449                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2450                         args[0] = ni->ni_mlpid;
2451                         args[1] = ni->ni_mllid;
2452                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2453                         ieee80211_send_action(ni,
2454                             IEEE80211_ACTION_CAT_SELF_PROT,
2455                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2456                             args);
2457                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2458                         mesh_peer_timeout_setup(ni);
2459                 }
2460                 break;
2461         default:
2462                 IEEE80211_DISCARD(vap,
2463                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2464                     wh, NULL, "received confirm in invalid state %d",
2465                     ni->ni_mlstate);
2466                 vap->iv_stats.is_rx_mgtdiscard++;
2467                 break;
2468         }
2469         return 0;
2470 }
2471
2472 static int
2473 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2474         const struct ieee80211_frame *wh,
2475         const uint8_t *frm, const uint8_t *efrm)
2476 {
2477         struct ieee80211_meshpeer_ie ie;
2478         const struct ieee80211_meshpeer_ie *meshpeer;
2479         uint16_t args[3];
2480
2481         /* +2 for action + code */
2482         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2483             IEEE80211_ACTION_MESHPEERING_CLOSE);
2484         if (meshpeer == NULL) {
2485                 return 0;
2486         }
2487
2488         /*
2489          * XXX: check reason code, for example we could receive
2490          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2491          * to peer again.
2492          */
2493
2494         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2495             ni, "%s", "recv PEER CLOSE");
2496
2497         switch (ni->ni_mlstate) {
2498         case IEEE80211_NODE_MESH_IDLE:
2499                 /* ignore */
2500                 break;
2501         case IEEE80211_NODE_MESH_OPENRCV:
2502         case IEEE80211_NODE_MESH_OPENSNT:
2503         case IEEE80211_NODE_MESH_CONFIRMRCV:
2504         case IEEE80211_NODE_MESH_ESTABLISHED:
2505                 args[0] = ni->ni_mlpid;
2506                 args[1] = ni->ni_mllid;
2507                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2508                 ieee80211_send_action(ni,
2509                     IEEE80211_ACTION_CAT_SELF_PROT,
2510                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2511                     args);
2512                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2513                 mesh_peer_timeout_setup(ni);
2514                 break;
2515         case IEEE80211_NODE_MESH_HOLDING:
2516                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2517                 mesh_peer_timeout_stop(ni);
2518                 break;
2519         }
2520         return 0;
2521 }
2522
2523 /*
2524  * Link Metric handling.
2525  */
2526 static int
2527 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2528         const struct ieee80211_frame *wh,
2529         const uint8_t *frm, const uint8_t *efrm)
2530 {
2531         const struct ieee80211_meshlmetric_ie *ie =
2532             (const struct ieee80211_meshlmetric_ie *)
2533             (frm+2); /* action + code */
2534         struct ieee80211_meshlmetric_ie lm_rep;
2535
2536         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2537                 lm_rep.lm_flags = 0;
2538                 lm_rep.lm_metric = mesh_airtime_calc(ni);
2539                 ieee80211_send_action(ni,
2540                     IEEE80211_ACTION_CAT_MESH,
2541                     IEEE80211_ACTION_MESH_LMETRIC,
2542                     &lm_rep);
2543         }
2544         /* XXX: else do nothing for now */
2545         return 0;
2546 }
2547
2548 /*
2549  * Parse meshgate action ie's for GANN frames.
2550  * Returns -1 if parsing fails, otherwise 0.
2551  */
2552 static int
2553 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2554     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
2555     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2556 {
2557         struct ieee80211vap *vap = ni->ni_vap;
2558         const struct ieee80211_meshgann_ie *gannie;
2559
2560         while (efrm - frm > 1) {
2561                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2562                 switch (*frm) {
2563                 case IEEE80211_ELEMID_MESHGANN:
2564                         gannie = (const struct ieee80211_meshgann_ie *) frm;
2565                         memset(ie, 0, sizeof(*ie));
2566                         ie->gann_ie = gannie->gann_ie;
2567                         ie->gann_len = gannie->gann_len;
2568                         ie->gann_flags = gannie->gann_flags;
2569                         ie->gann_hopcount = gannie->gann_hopcount;
2570                         ie->gann_ttl = gannie->gann_ttl;
2571                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2572                         ie->gann_seq = LE_READ_4(&gannie->gann_seq);
2573                         ie->gann_interval = LE_READ_2(&gannie->gann_interval);
2574                         break;
2575                 }
2576                 frm += frm[1] + 2;
2577         }
2578
2579         return 0;
2580 }
2581
2582 /*
2583  * Mesh Gate Announcement handling.
2584  */
2585 static int
2586 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2587         const struct ieee80211_frame *wh,
2588         const uint8_t *frm, const uint8_t *efrm)
2589 {
2590         struct ieee80211vap *vap = ni->ni_vap;
2591         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2592         struct ieee80211_mesh_gate_route *gr, *next;
2593         struct ieee80211_mesh_route *rt_gate;
2594         struct ieee80211_meshgann_ie pgann;
2595         struct ieee80211_meshgann_ie ie;
2596         int found = 0;
2597
2598         /* +2 for action + code */
2599         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2600                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2601                     ni->ni_macaddr, NULL, "%s",
2602                     "GANN parsing failed");
2603                 vap->iv_stats.is_rx_mgtdiscard++;
2604                 return (0);
2605         }
2606
2607         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2608                 return 0;
2609
2610         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2611             "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2612             ie.gann_seq);
2613
2614         if (ms == NULL)
2615                 return (0);
2616         MESH_RT_LOCK(ms);
2617         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2618                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2619                         continue;
2620                 if (ie.gann_seq <= gr->gr_lastseq) {
2621                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2622                             ni->ni_macaddr, NULL,
2623                             "GANN old seqno %u <= %u",
2624                             ie.gann_seq, gr->gr_lastseq);
2625                         MESH_RT_UNLOCK(ms);
2626                         return (0);
2627                 }
2628                 /* corresponding mesh gate found & GANN accepted */
2629                 found = 1;
2630                 break;
2631
2632         }
2633         if (found == 0) {
2634                 /* this GANN is from a new mesh Gate add it to known table. */
2635                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2636                     "stored new GANN information, seq %u.", ie.gann_seq);
2637                 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2638                     M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO);
2639                 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2640                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2641         }
2642         gr->gr_lastseq = ie.gann_seq;
2643
2644         /* check if we have a path to this gate */
2645         rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2646         if (rt_gate != NULL &&
2647             rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2648                 gr->gr_route = rt_gate;
2649                 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2650         }
2651
2652         MESH_RT_UNLOCK(ms);
2653
2654         /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2655         if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2656                 return 0;
2657                 pgann.gann_flags = ie.gann_flags; /* Reserved */
2658         pgann.gann_hopcount = ie.gann_hopcount + 1;
2659         pgann.gann_ttl = ie.gann_ttl - 1;
2660         IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2661         pgann.gann_seq = ie.gann_seq;
2662         pgann.gann_interval = ie.gann_interval;
2663
2664         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2665             "%s", "propagate GANN");
2666
2667         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2668             IEEE80211_ACTION_MESH_GANN, &pgann);
2669
2670         return 0;
2671 }
2672
2673 static int
2674 mesh_send_action(struct ieee80211_node *ni,
2675     const uint8_t sa[IEEE80211_ADDR_LEN],
2676     const uint8_t da[IEEE80211_ADDR_LEN],
2677     struct mbuf *m)
2678 {
2679         struct ieee80211vap *vap = ni->ni_vap;
2680         struct ieee80211com *ic = ni->ni_ic;
2681         struct ieee80211_bpf_params params;
2682         struct ieee80211_frame *wh;
2683         int ret;
2684
2685         KASSERT(ni != NULL, ("null node"));
2686
2687         if (vap->iv_state == IEEE80211_S_CAC) {
2688                 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2689                     "block %s frame in CAC state", "Mesh action");
2690                 vap->iv_stats.is_tx_badstate++;
2691                 ieee80211_free_node(ni);
2692                 m_freem(m);
2693                 return EIO;             /* XXX */
2694         }
2695
2696         M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT);
2697         if (m == NULL) {
2698                 ieee80211_free_node(ni);
2699                 return ENOMEM;
2700         }
2701
2702         IEEE80211_TX_LOCK(ic);
2703         wh = mtod(m, struct ieee80211_frame *);
2704         ieee80211_send_setup(ni, m,
2705              IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2706              IEEE80211_NONQOS_TID, sa, da, sa);
2707         m->m_flags |= M_ENCAP;          /* mark encapsulated */
2708
2709         memset(&params, 0, sizeof(params));
2710         params.ibp_pri = WME_AC_VO;
2711         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2712         if (IEEE80211_IS_MULTICAST(da))
2713                 params.ibp_try0 = 1;
2714         else
2715                 params.ibp_try0 = ni->ni_txparms->maxretry;
2716         params.ibp_power = ni->ni_txpower;
2717
2718         IEEE80211_NODE_STAT(ni, tx_mgmt);
2719
2720         ret = ieee80211_raw_output(vap, ni, m, &params);
2721         IEEE80211_TX_UNLOCK(ic);
2722         return (ret);
2723 }
2724
2725 #define ADDSHORT(frm, v) do {                   \
2726         frm[0] = (v) & 0xff;                    \
2727         frm[1] = (v) >> 8;                      \
2728         frm += 2;                               \
2729 } while (0)
2730 #define ADDWORD(frm, v) do {                    \
2731         frm[0] = (v) & 0xff;                    \
2732         frm[1] = ((v) >> 8) & 0xff;             \
2733         frm[2] = ((v) >> 16) & 0xff;            \
2734         frm[3] = ((v) >> 24) & 0xff;            \
2735         frm += 4;                               \
2736 } while (0)
2737
2738 static int
2739 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2740         int category, int action, void *args0)
2741 {
2742         struct ieee80211vap *vap = ni->ni_vap;
2743         struct ieee80211com *ic = ni->ni_ic;
2744         uint16_t *args = args0;
2745         const struct ieee80211_rateset *rs;
2746         struct mbuf *m;
2747         uint8_t *frm;
2748
2749         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2750             "send PEER OPEN action: localid 0x%x", args[0]);
2751
2752         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2753             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2754             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2755         ieee80211_ref_node(ni);
2756
2757         m = ieee80211_getmgtframe(&frm,
2758             ic->ic_headroom + sizeof(struct ieee80211_frame),
2759             sizeof(uint16_t)    /* action+category */
2760             + sizeof(uint16_t)  /* capabilites */
2761             + 2 + IEEE80211_RATE_SIZE
2762             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2763             + 2 + IEEE80211_MESHID_LEN
2764             + sizeof(struct ieee80211_meshconf_ie)
2765             + sizeof(struct ieee80211_meshpeer_ie)
2766         );
2767         if (m != NULL) {
2768                 /*
2769                  * mesh peer open action frame format:
2770                  *   [1] category
2771                  *   [1] action
2772                  *   [2] capabilities
2773                  *   [tlv] rates
2774                  *   [tlv] xrates
2775                  *   [tlv] mesh id
2776                  *   [tlv] mesh conf
2777                  *   [tlv] mesh peer link mgmt
2778                  */
2779                 *frm++ = category;
2780                 *frm++ = action;
2781                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2782                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2783                 frm = ieee80211_add_rates(frm, rs);
2784                 frm = ieee80211_add_xrates(frm, rs);
2785                 frm = ieee80211_add_meshid(frm, vap);
2786                 frm = ieee80211_add_meshconf(frm, vap);
2787                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2788                     args[0], 0, 0);
2789                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2790                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2791         } else {
2792                 vap->iv_stats.is_tx_nobuf++;
2793                 ieee80211_free_node(ni);
2794                 return ENOMEM;
2795         }
2796 }
2797
2798 static int
2799 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2800         int category, int action, void *args0)
2801 {
2802         struct ieee80211vap *vap = ni->ni_vap;
2803         struct ieee80211com *ic = ni->ni_ic;
2804         uint16_t *args = args0;
2805         const struct ieee80211_rateset *rs;
2806         struct mbuf *m;
2807         uint8_t *frm;
2808
2809         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2810             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2811             args[0], args[1]);
2812
2813         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2814             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2815             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2816         ieee80211_ref_node(ni);
2817
2818         m = ieee80211_getmgtframe(&frm,
2819             ic->ic_headroom + sizeof(struct ieee80211_frame),
2820             sizeof(uint16_t)    /* action+category */
2821             + sizeof(uint16_t)  /* capabilites */
2822             + sizeof(uint16_t)  /* status code */
2823             + sizeof(uint16_t)  /* AID */
2824             + 2 + IEEE80211_RATE_SIZE
2825             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2826             + 2 + IEEE80211_MESHID_LEN
2827             + sizeof(struct ieee80211_meshconf_ie)
2828             + sizeof(struct ieee80211_meshpeer_ie)
2829         );
2830         if (m != NULL) {
2831                 /*
2832                  * mesh peer confirm action frame format:
2833                  *   [1] category
2834                  *   [1] action
2835                  *   [2] capabilities
2836                  *   [2] status code
2837                  *   [2] association id (peer ID)
2838                  *   [tlv] rates
2839                  *   [tlv] xrates
2840                  *   [tlv] mesh id
2841                  *   [tlv] mesh conf
2842                  *   [tlv] mesh peer link mgmt
2843                  */
2844                 *frm++ = category;
2845                 *frm++ = action;
2846                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2847                 ADDSHORT(frm, 0);               /* status code */
2848                 ADDSHORT(frm, args[1]);         /* AID */
2849                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2850                 frm = ieee80211_add_rates(frm, rs);
2851                 frm = ieee80211_add_xrates(frm, rs);
2852                 frm = ieee80211_add_meshid(frm, vap);
2853                 frm = ieee80211_add_meshconf(frm, vap);
2854                 frm = ieee80211_add_meshpeer(frm,
2855                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2856                     args[0], args[1], 0);
2857                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2858                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2859         } else {
2860                 vap->iv_stats.is_tx_nobuf++;
2861                 ieee80211_free_node(ni);
2862                 return ENOMEM;
2863         }
2864 }
2865
2866 static int
2867 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2868         int category, int action, void *args0)
2869 {
2870         struct ieee80211vap *vap = ni->ni_vap;
2871         struct ieee80211com *ic = ni->ni_ic;
2872         uint16_t *args = args0;
2873         struct mbuf *m;
2874         uint8_t *frm;
2875
2876         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2877             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d",
2878             args[0], args[1], args[2]);
2879
2880         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2881             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2882             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2883         ieee80211_ref_node(ni);
2884
2885         m = ieee80211_getmgtframe(&frm,
2886             ic->ic_headroom + sizeof(struct ieee80211_frame),
2887             sizeof(uint16_t)    /* action+category */
2888             + sizeof(uint16_t)  /* reason code */
2889             + 2 + IEEE80211_MESHID_LEN
2890             + sizeof(struct ieee80211_meshpeer_ie)
2891         );
2892         if (m != NULL) {
2893                 /*
2894                  * mesh peer close action frame format:
2895                  *   [1] category
2896                  *   [1] action
2897                  *   [tlv] mesh id
2898                  *   [tlv] mesh peer link mgmt
2899                  */
2900                 *frm++ = category;
2901                 *frm++ = action;
2902                 frm = ieee80211_add_meshid(frm, vap);
2903                 frm = ieee80211_add_meshpeer(frm,
2904                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2905                     args[0], args[1], args[2]);
2906                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2907                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2908         } else {
2909                 vap->iv_stats.is_tx_nobuf++;
2910                 ieee80211_free_node(ni);
2911                 return ENOMEM;
2912         }
2913 }
2914
2915 static int
2916 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2917         int category, int action, void *arg0)
2918 {
2919         struct ieee80211vap *vap = ni->ni_vap;
2920         struct ieee80211com *ic = ni->ni_ic;
2921         struct ieee80211_meshlmetric_ie *ie = arg0;
2922         struct mbuf *m;
2923         uint8_t *frm;
2924
2925         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2926                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2927                     ni, "%s", "send LINK METRIC REQUEST action");
2928         } else {
2929                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2930                     ni, "send LINK METRIC REPLY action: metric 0x%x",
2931                     ie->lm_metric);
2932         }
2933         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2934             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2935             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2936         ieee80211_ref_node(ni);
2937
2938         m = ieee80211_getmgtframe(&frm,
2939             ic->ic_headroom + sizeof(struct ieee80211_frame),
2940             sizeof(uint16_t) +  /* action+category */
2941             sizeof(struct ieee80211_meshlmetric_ie)
2942         );
2943         if (m != NULL) {
2944                 /*
2945                  * mesh link metric
2946                  *   [1] category
2947                  *   [1] action
2948                  *   [tlv] mesh link metric
2949                  */
2950                 *frm++ = category;
2951                 *frm++ = action;
2952                 frm = ieee80211_add_meshlmetric(frm,
2953                     ie->lm_flags, ie->lm_metric);
2954                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2955                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2956         } else {
2957                 vap->iv_stats.is_tx_nobuf++;
2958                 ieee80211_free_node(ni);
2959                 return ENOMEM;
2960         }
2961 }
2962
2963 static int
2964 mesh_send_action_meshgate(struct ieee80211_node *ni,
2965         int category, int action, void *arg0)
2966 {
2967         struct ieee80211vap *vap = ni->ni_vap;
2968         struct ieee80211com *ic = ni->ni_ic;
2969         struct ieee80211_meshgann_ie *ie = arg0;
2970         struct mbuf *m;
2971         uint8_t *frm;
2972
2973         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2974             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2975             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2976         ieee80211_ref_node(ni);
2977
2978         m = ieee80211_getmgtframe(&frm,
2979             ic->ic_headroom + sizeof(struct ieee80211_frame),
2980             sizeof(uint16_t) +  /* action+category */
2981             IEEE80211_MESHGANN_BASE_SZ
2982         );
2983         if (m != NULL) {
2984                 /*
2985                  * mesh link metric
2986                  *   [1] category
2987                  *   [1] action
2988                  *   [tlv] mesh gate annoucement
2989                  */
2990                 *frm++ = category;
2991                 *frm++ = action;
2992                 frm = ieee80211_add_meshgate(frm, ie);
2993                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2994                 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2995         } else {
2996                 vap->iv_stats.is_tx_nobuf++;
2997                 ieee80211_free_node(ni);
2998                 return ENOMEM;
2999         }
3000 }
3001
3002 static void
3003 mesh_peer_timeout_setup(struct ieee80211_node *ni)
3004 {
3005         switch (ni->ni_mlstate) {
3006         case IEEE80211_NODE_MESH_HOLDING:
3007                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
3008                 break;
3009         case IEEE80211_NODE_MESH_CONFIRMRCV:
3010                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
3011                 break;
3012         case IEEE80211_NODE_MESH_IDLE:
3013                 ni->ni_mltval = 0;
3014                 break;
3015         default:
3016                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
3017                 break;
3018         }
3019         if (ni->ni_mltval)
3020                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
3021                     mesh_peer_timeout_cb, ni);
3022 }
3023
3024 /*
3025  * Same as above but backoffs timer statisically 50%.
3026  */
3027 static void
3028 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3029 {
3030         uint32_t r;
3031
3032         r = arc4random();
3033         ni->ni_mltval += r % ni->ni_mltval;
3034         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3035             ni);
3036 }
3037
3038 static __inline void
3039 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3040 {
3041         callout_drain(&ni->ni_mltimer);
3042 }
3043
3044 static void
3045 mesh_peer_backoff_cb(void *arg)
3046 {
3047         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3048
3049         /* After backoff timeout, try to peer automatically again. */
3050         ni->ni_mlhcnt = 0;
3051 }
3052
3053 /*
3054  * Mesh Peer Link Management FSM timeout handling.
3055  */
3056 static void
3057 mesh_peer_timeout_cb(void *arg)
3058 {
3059         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3060         uint16_t args[3];
3061
3062         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3063             ni, "mesh link timeout, state %d, retry counter %d",
3064             ni->ni_mlstate, ni->ni_mlrcnt);
3065
3066         switch (ni->ni_mlstate) {
3067         case IEEE80211_NODE_MESH_IDLE:
3068         case IEEE80211_NODE_MESH_ESTABLISHED:
3069                 break;
3070         case IEEE80211_NODE_MESH_OPENSNT:
3071         case IEEE80211_NODE_MESH_OPENRCV:
3072                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3073                         args[0] = ni->ni_mlpid;
3074                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3075                         ieee80211_send_action(ni,
3076                             IEEE80211_ACTION_CAT_SELF_PROT,
3077                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3078                         ni->ni_mlrcnt = 0;
3079                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3080                         mesh_peer_timeout_setup(ni);
3081                 } else {
3082                         args[0] = ni->ni_mlpid;
3083                         ieee80211_send_action(ni,
3084                             IEEE80211_ACTION_CAT_SELF_PROT,
3085                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
3086                         ni->ni_mlrcnt++;
3087                         mesh_peer_timeout_backoff(ni);
3088                 }
3089                 break;
3090         case IEEE80211_NODE_MESH_CONFIRMRCV:
3091                 args[0] = ni->ni_mlpid;
3092                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3093                 ieee80211_send_action(ni,
3094                     IEEE80211_ACTION_CAT_SELF_PROT,
3095                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3096                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3097                 mesh_peer_timeout_setup(ni);
3098                 break;
3099         case IEEE80211_NODE_MESH_HOLDING:
3100                 ni->ni_mlhcnt++;
3101                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3102                         callout_reset(&ni->ni_mlhtimer,
3103                             ieee80211_mesh_backofftimeout,
3104                             mesh_peer_backoff_cb, ni);
3105                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3106                 break;
3107         }
3108 }
3109
3110 static int
3111 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3112 {
3113         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3114
3115         if (ie == NULL || ie[1] != ms->ms_idlen)
3116                 return 1;
3117         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3118 }
3119
3120 /*
3121  * Check if we are using the same algorithms for this mesh.
3122  */
3123 static int
3124 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3125 {
3126         const struct ieee80211_meshconf_ie *meshconf =
3127             (const struct ieee80211_meshconf_ie *) ie;
3128         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3129
3130         if (meshconf == NULL)
3131                 return 1;
3132         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3133                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3134                     "unknown path selection algorithm: 0x%x\n",
3135                     meshconf->conf_pselid);
3136                 return 1;
3137         }
3138         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3139                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3140                     "unknown path metric algorithm: 0x%x\n",
3141                     meshconf->conf_pmetid);
3142                 return 1;
3143         }
3144         if (meshconf->conf_ccid != 0) {
3145                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3146                     "unknown congestion control algorithm: 0x%x\n",
3147                     meshconf->conf_ccid);
3148                 return 1;
3149         }
3150         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3151                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3152                     "unknown sync algorithm: 0x%x\n",
3153                     meshconf->conf_syncid);
3154                 return 1;
3155         }
3156         if (meshconf->conf_authid != 0) {
3157                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3158                     "unknown auth auth algorithm: 0x%x\n",
3159                     meshconf->conf_pselid);
3160                 return 1;
3161         }
3162         /* Not accepting peers */
3163         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3164                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3165                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
3166                 return 1;
3167         }
3168         return 0;
3169 }
3170
3171 static int
3172 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3173     const uint8_t *ie)
3174 {
3175         const struct ieee80211_meshpeer_ie *meshpeer =
3176             (const struct ieee80211_meshpeer_ie *) ie;
3177
3178         if (meshpeer == NULL ||
3179             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3180             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3181                 return 1;
3182         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3183                 IEEE80211_DPRINTF(vap,
3184                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3185                     "Only MPM protocol is supported (proto: 0x%02X)",
3186                     meshpeer->peer_proto);
3187                 return 1;
3188         }
3189         switch (subtype) {
3190         case IEEE80211_ACTION_MESHPEERING_OPEN:
3191                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3192                         return 1;
3193                 break;
3194         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3195                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3196                         return 1;
3197                 break;
3198         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3199                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3200                         return 1;
3201                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3202                     meshpeer->peer_linkid != 0)
3203                         return 1;
3204                 if (meshpeer->peer_rcode == 0)
3205                         return 1;
3206                 break;
3207         }
3208         return 0;
3209 }
3210
3211 /*
3212  * Add a Mesh ID IE to a frame.
3213  */
3214 uint8_t *
3215 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3216 {
3217         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3218
3219         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3220
3221         *frm++ = IEEE80211_ELEMID_MESHID;
3222         *frm++ = ms->ms_idlen;
3223         memcpy(frm, ms->ms_id, ms->ms_idlen);
3224         return frm + ms->ms_idlen;
3225 }
3226
3227 /*
3228  * Add a Mesh Configuration IE to a frame.
3229  * For now just use HWMP routing, Airtime link metric, Null Congestion
3230  * Signaling, Null Sync Protocol and Null Authentication.
3231  */
3232 uint8_t *
3233 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3234 {
3235         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3236         uint16_t caps;
3237
3238         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3239
3240         *frm++ = IEEE80211_ELEMID_MESHCONF;
3241         *frm++ = IEEE80211_MESH_CONF_SZ;
3242         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
3243         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
3244         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3245         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3246         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3247         /* NB: set the number of neighbors before the rest */
3248         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3249             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3250         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3251                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3252         frm += 1;
3253         caps = 0;
3254         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3255                 caps |= IEEE80211_MESHCONF_CAP_AP;
3256         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3257                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3258         *frm++ = caps;
3259         return frm;
3260 }
3261
3262 /*
3263  * Add a Mesh Peer Management IE to a frame.
3264  */
3265 uint8_t *
3266 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3267     uint16_t peerid, uint16_t reason)
3268 {
3269
3270         KASSERT(localid != 0, ("localid == 0"));
3271
3272         *frm++ = IEEE80211_ELEMID_MESHPEER;
3273         switch (subtype) {
3274         case IEEE80211_ACTION_MESHPEERING_OPEN:
3275                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
3276                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3277                 ADDSHORT(frm, localid);                 /* local ID */
3278                 break;
3279         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3280                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3281                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
3282                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3283                 ADDSHORT(frm, localid);                 /* local ID */
3284                 ADDSHORT(frm, peerid);                  /* peer ID */
3285                 break;
3286         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3287                 if (peerid)
3288                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
3289                 else
3290                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3291                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3292                 ADDSHORT(frm, localid); /* local ID */
3293                 if (peerid)
3294                         ADDSHORT(frm, peerid);  /* peer ID */
3295                 ADDSHORT(frm, reason);
3296                 break;
3297         }
3298         return frm;
3299 }
3300
3301 /*
3302  * Compute an Airtime Link Metric for the link with this node.
3303  *
3304  * Based on Draft 3.0 spec (11B.10, p.149).
3305  */
3306 /*
3307  * Max 802.11s overhead.
3308  */
3309 #define IEEE80211_MESH_MAXOVERHEAD \
3310         (sizeof(struct ieee80211_qosframe_addr4) \
3311          + sizeof(struct ieee80211_meshcntl_ae10) \
3312         + sizeof(struct llc) \
3313         + IEEE80211_ADDR_LEN \
3314         + IEEE80211_WEP_IVLEN \
3315         + IEEE80211_WEP_KIDLEN \
3316         + IEEE80211_WEP_CRCLEN \
3317         + IEEE80211_WEP_MICLEN \
3318         + IEEE80211_CRC_LEN)
3319 uint32_t
3320 mesh_airtime_calc(struct ieee80211_node *ni)
3321 {
3322 #define M_BITS 8
3323 #define S_FACTOR (2 * M_BITS)
3324         struct ieee80211com *ic = ni->ni_ic;
3325         struct ifnet *ifp = ni->ni_vap->iv_ifp;
3326         const static int nbits = 8192 << M_BITS;
3327         uint32_t overhead, rate, errrate;
3328         uint64_t res;
3329
3330         /* Time to transmit a frame */
3331         rate = ni->ni_txrate;
3332         overhead = ieee80211_compute_duration(ic->ic_rt,
3333             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3334         /* Error rate in percentage */
3335         /* XXX assuming small failures are ok */
3336         errrate = (((ifp->if_oerrors +
3337             ifp->if_ierrors) / 100) << M_BITS) / 100;
3338         res = (overhead + (nbits / rate)) *
3339             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3340
3341         return (uint32_t)(res >> S_FACTOR);
3342 #undef M_BITS
3343 #undef S_FACTOR
3344 }
3345
3346 /*
3347  * Add a Mesh Link Metric report IE to a frame.
3348  */
3349 uint8_t *
3350 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3351 {
3352         *frm++ = IEEE80211_ELEMID_MESHLINK;
3353         *frm++ = 5;
3354         *frm++ = flags;
3355         ADDWORD(frm, metric);
3356         return frm;
3357 }
3358
3359 /*
3360  * Add a Mesh Gate Announcement IE to a frame.
3361  */
3362 uint8_t *
3363 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3364 {
3365         *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3366         *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3367         *frm++ = ie->gann_flags;
3368         *frm++ = ie->gann_hopcount;
3369         *frm++ = ie->gann_ttl;
3370         IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3371         frm += 6;
3372         ADDWORD(frm, ie->gann_seq);
3373         ADDSHORT(frm, ie->gann_interval);
3374         return frm;
3375 }
3376 #undef ADDSHORT
3377 #undef ADDWORD
3378
3379 /*
3380  * Initialize any mesh-specific node state.
3381  */
3382 void
3383 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3384 {
3385         ni->ni_flags |= IEEE80211_NODE_QOS;
3386         callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE);
3387         callout_init(&ni->ni_mlhtimer, CALLOUT_MPSAFE);
3388 }
3389
3390 /*
3391  * Cleanup any mesh-specific node state.
3392  */
3393 void
3394 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3395 {
3396         struct ieee80211vap *vap = ni->ni_vap;
3397         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3398
3399         callout_drain(&ni->ni_mltimer);
3400         callout_drain(&ni->ni_mlhtimer);
3401         /* NB: short-circuit callbacks after mesh_vdetach */
3402         if (vap->iv_mesh != NULL)
3403                 ms->ms_ppath->mpp_peerdown(ni);
3404 }
3405
3406 void
3407 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3408 {
3409         ni->ni_meshidlen = ie[1];
3410         memcpy(ni->ni_meshid, ie + 2, ie[1]);
3411 }
3412
3413 /*
3414  * Setup mesh-specific node state on neighbor discovery.
3415  */
3416 void
3417 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3418         const struct ieee80211_frame *wh,
3419         const struct ieee80211_scanparams *sp)
3420 {
3421         ieee80211_parse_meshid(ni, sp->meshid);
3422 }
3423
3424 void
3425 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3426         struct ieee80211_beacon_offsets *bo)
3427 {
3428         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3429
3430         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3431                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3432                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3433         }
3434 }
3435
3436 static int
3437 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3438 {
3439         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3440         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3441         struct ieee80211_mesh_route *rt;
3442         struct ieee80211req_mesh_route *imr;
3443         size_t len, off;
3444         uint8_t *p;
3445         int error;
3446
3447         if (vap->iv_opmode != IEEE80211_M_MBSS)
3448                 return ENOSYS;
3449
3450         error = 0;
3451         switch (ireq->i_type) {
3452         case IEEE80211_IOC_MESH_ID:
3453                 ireq->i_len = ms->ms_idlen;
3454                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3455                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3456                 break;
3457         case IEEE80211_IOC_MESH_AP:
3458                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3459                 break;
3460         case IEEE80211_IOC_MESH_FWRD:
3461                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3462                 break;
3463         case IEEE80211_IOC_MESH_GATE:
3464                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3465                 break;
3466         case IEEE80211_IOC_MESH_TTL:
3467                 ireq->i_val = ms->ms_ttl;
3468                 break;
3469         case IEEE80211_IOC_MESH_RTCMD:
3470                 switch (ireq->i_val) {
3471                 case IEEE80211_MESH_RTCMD_LIST:
3472                         len = 0;
3473                         MESH_RT_LOCK(ms);
3474                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3475                                 len += sizeof(*imr);
3476                         }
3477                         MESH_RT_UNLOCK(ms);
3478                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3479                                 ireq->i_len = len;
3480                                 return ENOMEM;
3481                         }
3482                         ireq->i_len = len;
3483                         /* XXX M_WAIT? */
3484                         p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO);
3485                         if (p == NULL)
3486                                 return ENOMEM;
3487                         off = 0;
3488                         MESH_RT_LOCK(ms);
3489                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3490                                 if (off >= len)
3491                                         break;
3492                                 imr = (struct ieee80211req_mesh_route *)
3493                                     (p + off);
3494                                 IEEE80211_ADDR_COPY(imr->imr_dest,
3495                                     rt->rt_dest);
3496                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3497                                     rt->rt_nexthop);
3498                                 imr->imr_metric = rt->rt_metric;
3499                                 imr->imr_nhops = rt->rt_nhops;
3500                                 imr->imr_lifetime =
3501                                     ieee80211_mesh_rt_update(rt, 0);
3502                                 imr->imr_lastmseq = rt->rt_lastmseq;
3503                                 imr->imr_flags = rt->rt_flags; /* last */
3504                                 off += sizeof(*imr);
3505                         }
3506                         MESH_RT_UNLOCK(ms);
3507                         error = copyout(p, (uint8_t *)ireq->i_data,
3508                             ireq->i_len);
3509                         free(p, M_TEMP);
3510                         break;
3511                 case IEEE80211_MESH_RTCMD_FLUSH:
3512                 case IEEE80211_MESH_RTCMD_ADD:
3513                 case IEEE80211_MESH_RTCMD_DELETE:
3514                         return EINVAL;
3515                 default:
3516                         return ENOSYS;
3517                 }
3518                 break;
3519         case IEEE80211_IOC_MESH_PR_METRIC:
3520                 len = strlen(ms->ms_pmetric->mpm_descr);
3521                 if (ireq->i_len < len)
3522                         return EINVAL;
3523                 ireq->i_len = len;
3524                 error = copyout(ms->ms_pmetric->mpm_descr,
3525                     (uint8_t *)ireq->i_data, len);
3526                 break;
3527         case IEEE80211_IOC_MESH_PR_PATH:
3528                 len = strlen(ms->ms_ppath->mpp_descr);
3529                 if (ireq->i_len < len)
3530                         return EINVAL;
3531                 ireq->i_len = len;
3532                 error = copyout(ms->ms_ppath->mpp_descr,
3533                     (uint8_t *)ireq->i_data, len);
3534                 break;
3535         default:
3536                 return ENOSYS;
3537         }
3538
3539         return error;
3540 }
3541 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3542
3543 static int
3544 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3545 {
3546         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3547         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3548         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3549         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3550         int error;
3551
3552         if (vap->iv_opmode != IEEE80211_M_MBSS)
3553                 return ENOSYS;
3554
3555         error = 0;
3556         switch (ireq->i_type) {
3557         case IEEE80211_IOC_MESH_ID:
3558                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3559                         return EINVAL;
3560                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3561                 if (error != 0)
3562                         break;
3563                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3564                 ms->ms_idlen = ireq->i_len;
3565                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3566                 error = ENETRESET;
3567                 break;
3568         case IEEE80211_IOC_MESH_AP:
3569                 if (ireq->i_val)
3570                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3571                 else
3572                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3573                 error = ENETRESET;
3574                 break;
3575         case IEEE80211_IOC_MESH_FWRD:
3576                 if (ireq->i_val)
3577                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3578                 else
3579                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3580                 mesh_gatemode_setup(vap);
3581                 break;
3582         case IEEE80211_IOC_MESH_GATE:
3583                 if (ireq->i_val)
3584                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3585                 else
3586                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3587                 break;
3588         case IEEE80211_IOC_MESH_TTL:
3589                 ms->ms_ttl = (uint8_t) ireq->i_val;
3590                 break;
3591         case IEEE80211_IOC_MESH_RTCMD:
3592                 switch (ireq->i_val) {
3593                 case IEEE80211_MESH_RTCMD_LIST:
3594                         return EINVAL;
3595                 case IEEE80211_MESH_RTCMD_FLUSH:
3596                         ieee80211_mesh_rt_flush(vap);
3597                         break;
3598                 case IEEE80211_MESH_RTCMD_ADD:
3599                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
3600                             IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
3601                                 return EINVAL;
3602                         error = copyin(ireq->i_data, &tmpaddr,
3603                             IEEE80211_ADDR_LEN);
3604                         if (error == 0)
3605                                 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3606                         break;
3607                 case IEEE80211_MESH_RTCMD_DELETE:
3608                         ieee80211_mesh_rt_del(vap, ireq->i_data);
3609                         break;
3610                 default:
3611                         return ENOSYS;
3612                 }
3613                 break;
3614         case IEEE80211_IOC_MESH_PR_METRIC:
3615                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3616                 if (error == 0) {
3617                         error = mesh_select_proto_metric(vap, tmpproto);
3618                         if (error == 0)
3619                                 error = ENETRESET;
3620                 }
3621                 break;
3622         case IEEE80211_IOC_MESH_PR_PATH:
3623                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3624                 if (error == 0) {
3625                         error = mesh_select_proto_path(vap, tmpproto);
3626                         if (error == 0)
3627                                 error = ENETRESET;
3628                 }
3629                 break;
3630         default:
3631                 return ENOSYS;
3632         }
3633         return error;
3634 }
3635 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);