sys/net80211/ieee80211_mesh.c

   1 /*-
   2  * Copyright (c) 2009 The FreeBSD Foundation
   3  * All rights reserved.
   4  *
   5  * This software was developed by Rui Paulo under sponsorship from the
   6  * FreeBSD Foundation.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29 #include <sys/cdefs.h>
  30 #ifdef __FreeBSD__
  31 __FBSDID("$FreeBSD$");
  32 #endif
  33
  34 /*
  35  * IEEE 802.11s Mesh Point (MBSS) support.
  36  *
  37  * Based on March 2009, D3.0 802.11s draft spec.
  38  */
  39 #include "opt_inet.h"
  40 #include "opt_wlan.h"
  41
  42 #include <sys/param.h>
  43 #include <sys/systm.h>
  44 #include <sys/mbuf.h>
  45 #include <sys/malloc.h>
  46 #include <sys/kernel.h>
  47
  48 #include <sys/socket.h>
  49 #include <sys/sockio.h>
  50 #include <sys/endian.h>
  51 #include <sys/errno.h>
  52 #include <sys/proc.h>
  53 #include <sys/sysctl.h>
  54
  55 #include <net/bpf.h>
  56 #include <net/if.h>
  57 #include <net/if_media.h>
  58 #include <net/if_llc.h>
  59 #include <net/ethernet.h>
  60
  61 #include <net80211/ieee80211_var.h>
  62 #include <net80211/ieee80211_action.h>
  63 #ifdef IEEE80211_SUPPORT_SUPERG
  64 #include <net80211/ieee80211_superg.h>
  65 #endif
  66 #include <net80211/ieee80211_input.h>
  67 #include <net80211/ieee80211_mesh.h>
  68
  69 static void     mesh_rt_flush_invalid(struct ieee80211vap *);
  70 static int      mesh_select_proto_path(struct ieee80211vap *, const char *);
  71 static int      mesh_select_proto_metric(struct ieee80211vap *, const char *);
  72 static void     mesh_vattach(struct ieee80211vap *);
  73 static int      mesh_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  74 static void     mesh_rt_cleanup_cb(void *);
  75 static void     mesh_gatemode_setup(struct ieee80211vap *);
  76 static void     mesh_gatemode_cb(void *);
  77 static void     mesh_linkchange(struct ieee80211_node *,
  78                     enum ieee80211_mesh_mlstate);
  79 static void     mesh_checkid(void *, struct ieee80211_node *);
  80 static uint32_t mesh_generateid(struct ieee80211vap *);
  81 static int      mesh_checkpseq(struct ieee80211vap *,
  82                     const uint8_t [IEEE80211_ADDR_LEN], uint32_t);
  83 static void     mesh_transmit_to_gate(struct ieee80211vap *, struct mbuf *,
  84                     struct ieee80211_mesh_route *);
  85 static void     mesh_forward(struct ieee80211vap *, struct mbuf *,
  86                     const struct ieee80211_meshcntl *);
  87 static int      mesh_input(struct ieee80211_node *, struct mbuf *, int, int);
  88 static void     mesh_recv_mgmt(struct ieee80211_node *, struct mbuf *, int,
  89                     int, int);
  90 static void     mesh_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  91 static void     mesh_peer_timeout_setup(struct ieee80211_node *);
  92 static void     mesh_peer_timeout_backoff(struct ieee80211_node *);
  93 static void     mesh_peer_timeout_cb(void *);
  94 static __inline void
  95                 mesh_peer_timeout_stop(struct ieee80211_node *);
  96 static int      mesh_verify_meshid(struct ieee80211vap *, const uint8_t *);
  97 static int      mesh_verify_meshconf(struct ieee80211vap *, const uint8_t *);
  98 static int      mesh_verify_meshpeer(struct ieee80211vap *, uint8_t,
  99                     const uint8_t *);
 100 uint32_t        mesh_airtime_calc(struct ieee80211_node *);
 101
 102 /*
 103  * Timeout values come from the specification and are in milliseconds.
 104  */
 105 static SYSCTL_NODE(_net_wlan, OID_AUTO, mesh, CTLFLAG_RD, 0,
 106     "IEEE 802.11s parameters");
 107 static int      ieee80211_mesh_gateint = -1;
 108 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, gateint, CTLTYPE_INT | CTLFLAG_RW,
 109     &ieee80211_mesh_gateint, 0, ieee80211_sysctl_msecs_ticks, "I",
 110     "mesh gate interval (ms)");
 111 static int ieee80211_mesh_retrytimeout = -1;
 112 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, retrytimeout, CTLTYPE_INT | CTLFLAG_RW,
 113     &ieee80211_mesh_retrytimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 114     "Retry timeout (msec)");
 115 static int ieee80211_mesh_holdingtimeout = -1;
 116
 117 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, holdingtimeout, CTLTYPE_INT | CTLFLAG_RW,
 118     &ieee80211_mesh_holdingtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 119     "Holding state timeout (msec)");
 120 static int ieee80211_mesh_confirmtimeout = -1;
 121 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, confirmtimeout, CTLTYPE_INT | CTLFLAG_RW,
 122     &ieee80211_mesh_confirmtimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 123     "Confirm state timeout (msec)");
 124 static int ieee80211_mesh_backofftimeout = -1;
 125 SYSCTL_PROC(_net_wlan_mesh, OID_AUTO, backofftimeout, CTLTYPE_INT | CTLFLAG_RW,
 126     &ieee80211_mesh_backofftimeout, 0, ieee80211_sysctl_msecs_ticks, "I",
 127     "Backoff timeout (msec). This is to throutles peering forever when "
 128     "not receving answer or is rejected by a neighbor");
 129 static int ieee80211_mesh_maxretries = 2;
 130 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxretries, CTLTYPE_INT | CTLFLAG_RW,
 131     &ieee80211_mesh_maxretries, 0,
 132     "Maximum retries during peer link establishment");
 133 static int ieee80211_mesh_maxholding = 2;
 134 SYSCTL_INT(_net_wlan_mesh, OID_AUTO, maxholding, CTLTYPE_INT | CTLFLAG_RW,
 135     &ieee80211_mesh_maxholding, 0,
 136     "Maximum times we are allowed to transition to HOLDING state before "
 137     "backinoff during peer link establishment");
 138
 139 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
 140         { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 141
 142 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_open;
 143 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_confirm;
 144 static  ieee80211_recv_action_func mesh_recv_action_meshpeering_close;
 145 static  ieee80211_recv_action_func mesh_recv_action_meshlmetric;
 146 static  ieee80211_recv_action_func mesh_recv_action_meshgate;
 147
 148 static  ieee80211_send_action_func mesh_send_action_meshpeering_open;
 149 static  ieee80211_send_action_func mesh_send_action_meshpeering_confirm;
 150 static  ieee80211_send_action_func mesh_send_action_meshpeering_close;
 151 static  ieee80211_send_action_func mesh_send_action_meshlmetric;
 152 static  ieee80211_send_action_func mesh_send_action_meshgate;
 153
 154 static const struct ieee80211_mesh_proto_metric mesh_metric_airtime = {
 155         .mpm_descr      = "AIRTIME",
 156         .mpm_ie         = IEEE80211_MESHCONF_METRIC_AIRTIME,
 157         .mpm_metric     = mesh_airtime_calc,
 158 };
 159
 160 static struct ieee80211_mesh_proto_path         mesh_proto_paths[4];
 161 static struct ieee80211_mesh_proto_metric       mesh_proto_metrics[4];
 162
 163 #define RT_ENTRY_LOCK(rt)       mtx_lock(&(rt)->rt_lock)
 164 #define RT_ENTRY_LOCK_ASSERT(rt) mtx_assert(&(rt)->rt_lock, MA_OWNED)
 165 #define RT_ENTRY_UNLOCK(rt)     mtx_unlock(&(rt)->rt_lock)
 166
 167 #define MESH_RT_LOCK(ms)        mtx_lock(&(ms)->ms_rt_lock)
 168 #define MESH_RT_LOCK_ASSERT(ms) mtx_assert(&(ms)->ms_rt_lock, MA_OWNED)
 169 #define MESH_RT_UNLOCK(ms)      mtx_unlock(&(ms)->ms_rt_lock)
 170
 171 MALLOC_DEFINE(M_80211_MESH_PREQ, "80211preq", "802.11 MESH Path Request frame");
 172 MALLOC_DEFINE(M_80211_MESH_PREP, "80211prep", "802.11 MESH Path Reply frame");
 173 MALLOC_DEFINE(M_80211_MESH_PERR, "80211perr", "802.11 MESH Path Error frame");
 174
 175 /* The longer one of the lifetime should be stored as new lifetime */
 176 #define MESH_ROUTE_LIFETIME_MAX(a, b)   (a > b ? a : b)
 177
 178 MALLOC_DEFINE(M_80211_MESH_RT, "80211mesh_rt", "802.11s routing table");
 179 MALLOC_DEFINE(M_80211_MESH_GT_RT, "80211mesh_gt", "802.11s known gates table");
 180
 181 /*
 182  * Helper functions to manipulate the Mesh routing table.
 183  */
 184
 185 static struct ieee80211_mesh_route *
 186 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
 187     const uint8_t dest[IEEE80211_ADDR_LEN])
 188 {
 189         struct ieee80211_mesh_route *rt;
 190
 191         MESH_RT_LOCK_ASSERT(ms);
 192
 193         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
 194                 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
 195                         return rt;
 196         }
 197         return NULL;
 198 }
 199
 200 static struct ieee80211_mesh_route *
 201 mesh_rt_add_locked(struct ieee80211vap *vap,
 202     const uint8_t dest[IEEE80211_ADDR_LEN])
 203 {
 204         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 205         struct ieee80211_mesh_route *rt;
 206
 207         KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
 208             ("%s: adding broadcast to the routing table", __func__));
 209
 210         MESH_RT_LOCK_ASSERT(ms);
 211
 212         rt = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) +
 213             ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | M_ZERO);
 214         if (rt != NULL) {
 215                 rt->rt_vap = vap;
 216                 IEEE80211_ADDR_COPY(rt->rt_dest, dest);
 217                 rt->rt_priv = (void *)ALIGN(&rt[1]);
 218                 mtx_init(&rt->rt_lock, "MBSS_RT", "802.11s route entry", MTX_DEF);
 219                 callout_init(&rt->rt_discovery, CALLOUT_MPSAFE);
 220                 rt->rt_updtime = ticks; /* create time */
 221                 TAILQ_INSERT_TAIL(&ms->ms_routes, rt, rt_next);
 222         }
 223         return rt;
 224 }
 225
 226 struct ieee80211_mesh_route *
 227 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
 228     const uint8_t dest[IEEE80211_ADDR_LEN])
 229 {
 230         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 231         struct ieee80211_mesh_route *rt;
 232
 233         MESH_RT_LOCK(ms);
 234         rt = mesh_rt_find_locked(ms, dest);
 235         MESH_RT_UNLOCK(ms);
 236         return rt;
 237 }
 238
 239 struct ieee80211_mesh_route *
 240 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
 241     const uint8_t dest[IEEE80211_ADDR_LEN])
 242 {
 243         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 244         struct ieee80211_mesh_route *rt;
 245
 246         KASSERT(ieee80211_mesh_rt_find(vap, dest) == NULL,
 247             ("%s: duplicate entry in the routing table", __func__));
 248         KASSERT(!IEEE80211_ADDR_EQ(vap->iv_myaddr, dest),
 249             ("%s: adding self to the routing table", __func__));
 250
 251         MESH_RT_LOCK(ms);
 252         rt = mesh_rt_add_locked(vap, dest);
 253         MESH_RT_UNLOCK(ms);
 254         return rt;
 255 }
 256
 257 /*
 258  * Update the route lifetime and returns the updated lifetime.
 259  * If new_lifetime is zero and route is timedout it will be invalidated.
 260  * new_lifetime is in msec
 261  */
 262 int
 263 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
 264 {
 265         int timesince, now;
 266         uint32_t lifetime = 0;
 267
 268         KASSERT(rt != NULL, ("route is NULL"));
 269
 270         now = ticks;
 271         RT_ENTRY_LOCK(rt);
 272
 273         /* dont clobber a proxy entry gated by us */
 274         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
 275                 RT_ENTRY_UNLOCK(rt);
 276                 return rt->rt_lifetime;
 277         }
 278
 279         timesince = ticks_to_msecs(now - rt->rt_updtime);
 280         rt->rt_updtime = now;
 281         if (timesince >= rt->rt_lifetime) {
 282                 if (new_lifetime != 0) {
 283                         rt->rt_lifetime = new_lifetime;
 284                 }
 285                 else {
 286                         rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
 287                         rt->rt_lifetime = 0;
 288                 }
 289         } else {
 290                 /* update what is left of lifetime */
 291                 rt->rt_lifetime = rt->rt_lifetime - timesince;
 292                 rt->rt_lifetime  = MESH_ROUTE_LIFETIME_MAX(
 293                         new_lifetime, rt->rt_lifetime);
 294         }
 295         lifetime = rt->rt_lifetime;
 296         RT_ENTRY_UNLOCK(rt);
 297
 298         return lifetime;
 299 }
 300
 301 /*
 302  * Add a proxy route (as needed) for the specified destination.
 303  */
 304 void
 305 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
 306     const uint8_t dest[IEEE80211_ADDR_LEN])
 307 {
 308         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 309         struct ieee80211_mesh_route *rt;
 310
 311         MESH_RT_LOCK(ms);
 312         rt = mesh_rt_find_locked(ms, dest);
 313         if (rt == NULL) {
 314                 rt = mesh_rt_add_locked(vap, dest);
 315                 if (rt == NULL) {
 316                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 317                             "%s", "unable to add proxy entry");
 318                         vap->iv_stats.is_mesh_rtaddfailed++;
 319                 } else {
 320                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 321                             "%s", "add proxy entry");
 322                         IEEE80211_ADDR_COPY(rt->rt_mesh_gate, vap->iv_myaddr);
 323                         IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 324                         rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 325                                      |  IEEE80211_MESHRT_FLAGS_PROXY;
 326                 }
 327         } else if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
 328                 KASSERT(rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY,
 329                     ("no proxy flag for poxy entry"));
 330                 struct ieee80211com *ic = vap->iv_ic;
 331                 /*
 332                  * Fix existing entry created by received frames from
 333                  * stations that have some memory of dest.  We also
 334                  * flush any frames held on the staging queue; delivering
 335                  * them is too much trouble right now.
 336                  */
 337                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
 338                     "%s", "fix proxy entry");
 339                 IEEE80211_ADDR_COPY(rt->rt_nexthop, vap->iv_myaddr);
 340                 rt->rt_flags |= IEEE80211_MESHRT_FLAGS_VALID
 341                              |  IEEE80211_MESHRT_FLAGS_PROXY;
 342                 /* XXX belongs in hwmp */
 343                 ieee80211_ageq_drain_node(&ic->ic_stageq,
 344                    (void *)(uintptr_t) ieee80211_mac_hash(ic, dest));
 345                 /* XXX stat? */
 346         }
 347         MESH_RT_UNLOCK(ms);
 348 }
 349
 350 static __inline void
 351 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
 352 {
 353         TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
 354         /*
 355          * Grab the lock before destroying it, to be sure no one else
 356          * is holding the route.
 357          */
 358         RT_ENTRY_LOCK(rt);
 359         callout_drain(&rt->rt_discovery);
 360         mtx_destroy(&rt->rt_lock);
 361         free(rt, M_80211_MESH_RT);
 362 }
 363
 364 void
 365 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
 366     const uint8_t dest[IEEE80211_ADDR_LEN])
 367 {
 368         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 369         struct ieee80211_mesh_route *rt, *next;
 370
 371         MESH_RT_LOCK(ms);
 372         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 373                 if (IEEE80211_ADDR_EQ(rt->rt_dest, dest)) {
 374                         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
 375                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 376                                     IEEE80211_REASON_MESH_PERR_NO_PROXY);
 377                         } else {
 378                                 ms->ms_ppath->mpp_senderror(vap, dest, rt,
 379                                     IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
 380                         }
 381                         mesh_rt_del(ms, rt);
 382                         MESH_RT_UNLOCK(ms);
 383                         return;
 384                 }
 385         }
 386         MESH_RT_UNLOCK(ms);
 387 }
 388
 389 void
 390 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
 391 {
 392         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 393         struct ieee80211_mesh_route *rt, *next;
 394
 395         if (ms == NULL)
 396                 return;
 397         MESH_RT_LOCK(ms);
 398         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
 399                 mesh_rt_del(ms, rt);
 400         MESH_RT_UNLOCK(ms);
 401 }
 402
 403 void
 404 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
 405     const uint8_t peer[IEEE80211_ADDR_LEN])
 406 {
 407         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 408         struct ieee80211_mesh_route *rt, *next;
 409
 410         MESH_RT_LOCK(ms);
 411         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 412                 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
 413                         mesh_rt_del(ms, rt);
 414         }
 415         MESH_RT_UNLOCK(ms);
 416 }
 417
 418 /*
 419  * Flush expired routing entries, i.e. those in invalid state for
 420  * some time.
 421  */
 422 static void
 423 mesh_rt_flush_invalid(struct ieee80211vap *vap)
 424 {
 425         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 426         struct ieee80211_mesh_route *rt, *next;
 427
 428         if (ms == NULL)
 429                 return;
 430         MESH_RT_LOCK(ms);
 431         TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
 432                 /* Discover paths will be deleted by their own callout */
 433                 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_DISCOVER)
 434                         continue;
 435                 ieee80211_mesh_rt_update(rt, 0);
 436                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
 437                         mesh_rt_del(ms, rt);
 438         }
 439         MESH_RT_UNLOCK(ms);
 440 }
 441
 442 #define N(a)    (sizeof(a) / sizeof(a[0]))
 443 int
 444 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
 445 {
 446         int i, firstempty = -1;
 447
 448         for (i = 0; i < N(mesh_proto_paths); i++) {
 449                 if (strncmp(mpp->mpp_descr, mesh_proto_paths[i].mpp_descr,
 450                     IEEE80211_MESH_PROTO_DSZ) == 0)
 451                         return EEXIST;
 452                 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
 453                         firstempty = i;
 454         }
 455         if (firstempty < 0)
 456                 return ENOSPC;
 457         memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
 458         mesh_proto_paths[firstempty].mpp_active = 1;
 459         return 0;
 460 }
 461
 462 int
 463 ieee80211_mesh_register_proto_metric(const struct
 464     ieee80211_mesh_proto_metric *mpm)
 465 {
 466         int i, firstempty = -1;
 467
 468         for (i = 0; i < N(mesh_proto_metrics); i++) {
 469                 if (strncmp(mpm->mpm_descr, mesh_proto_metrics[i].mpm_descr,
 470                     IEEE80211_MESH_PROTO_DSZ) == 0)
 471                         return EEXIST;
 472                 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
 473                         firstempty = i;
 474         }
 475         if (firstempty < 0)
 476                 return ENOSPC;
 477         memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
 478         mesh_proto_metrics[firstempty].mpm_active = 1;
 479         return 0;
 480 }
 481
 482 static int
 483 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
 484 {
 485         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 486         int i;
 487
 488         for (i = 0; i < N(mesh_proto_paths); i++) {
 489                 if (strcasecmp(mesh_proto_paths[i].mpp_descr, name) == 0) {
 490                         ms->ms_ppath = &mesh_proto_paths[i];
 491                         return 0;
 492                 }
 493         }
 494         return ENOENT;
 495 }
 496
 497 static int
 498 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
 499 {
 500         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 501         int i;
 502
 503         for (i = 0; i < N(mesh_proto_metrics); i++) {
 504                 if (strcasecmp(mesh_proto_metrics[i].mpm_descr, name) == 0) {
 505                         ms->ms_pmetric = &mesh_proto_metrics[i];
 506                         return 0;
 507                 }
 508         }
 509         return ENOENT;
 510 }
 511 #undef  N
 512
 513 static void
 514 mesh_gatemode_setup(struct ieee80211vap *vap)
 515 {
 516         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 517
 518         /*
 519          * NB: When a mesh gate is running as a ROOT it shall
 520          * not send out periodic GANNs but instead mark the
 521          * mesh gate flag for the corresponding proactive PREQ
 522          * and RANN frames.
 523          */
 524         if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
 525             (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
 526                 callout_drain(&ms->ms_gatetimer);
 527                 return ;
 528         }
 529         callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
 530             mesh_gatemode_cb, vap);
 531 }
 532
 533 static void
 534 mesh_gatemode_cb(void *arg)
 535 {
 536         struct ieee80211vap *vap = (struct ieee80211vap *)arg;
 537         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 538         struct ieee80211_meshgann_ie gann;
 539
 540         gann.gann_flags = 0; /* Reserved */
 541         gann.gann_hopcount = 0;
 542         gann.gann_ttl = ms->ms_ttl;
 543         IEEE80211_ADDR_COPY(gann.gann_addr, vap->iv_myaddr);
 544         gann.gann_seq = ms->ms_gateseq++;
 545         gann.gann_interval = ieee80211_mesh_gateint;
 546
 547         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
 548             "send broadcast GANN (seq %u)", gann.gann_seq);
 549
 550         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
 551             IEEE80211_ACTION_MESH_GANN, &gann);
 552         mesh_gatemode_setup(vap);
 553 }
 554
 555 static void
 556 ieee80211_mesh_init(void)
 557 {
 558
 559         memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
 560         memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
 561
 562         /*
 563          * Setup mesh parameters that depends on the clock frequency.
 564          */
 565         ieee80211_mesh_gateint = msecs_to_ticks(10000);
 566         ieee80211_mesh_retrytimeout = msecs_to_ticks(40);
 567         ieee80211_mesh_holdingtimeout = msecs_to_ticks(40);
 568         ieee80211_mesh_confirmtimeout = msecs_to_ticks(40);
 569         ieee80211_mesh_backofftimeout = msecs_to_ticks(5000);
 570
 571         /*
 572          * Register action frame handlers.
 573          */
 574         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 575             IEEE80211_ACTION_MESHPEERING_OPEN,
 576             mesh_recv_action_meshpeering_open);
 577         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 578             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 579             mesh_recv_action_meshpeering_confirm);
 580         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 581             IEEE80211_ACTION_MESHPEERING_CLOSE,
 582             mesh_recv_action_meshpeering_close);
 583         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 584             IEEE80211_ACTION_MESH_LMETRIC, mesh_recv_action_meshlmetric);
 585         ieee80211_recv_action_register(IEEE80211_ACTION_CAT_MESH,
 586             IEEE80211_ACTION_MESH_GANN, mesh_recv_action_meshgate);
 587
 588         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 589             IEEE80211_ACTION_MESHPEERING_OPEN,
 590             mesh_send_action_meshpeering_open);
 591         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 592             IEEE80211_ACTION_MESHPEERING_CONFIRM,
 593             mesh_send_action_meshpeering_confirm);
 594         ieee80211_send_action_register(IEEE80211_ACTION_CAT_SELF_PROT,
 595             IEEE80211_ACTION_MESHPEERING_CLOSE,
 596             mesh_send_action_meshpeering_close);
 597         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 598             IEEE80211_ACTION_MESH_LMETRIC,
 599             mesh_send_action_meshlmetric);
 600         ieee80211_send_action_register(IEEE80211_ACTION_CAT_MESH,
 601             IEEE80211_ACTION_MESH_GANN,
 602             mesh_send_action_meshgate);
 603
 604         /*
 605          * Register Airtime Link Metric.
 606          */
 607         ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
 608
 609 }
 610 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
 611
 612 void
 613 ieee80211_mesh_attach(struct ieee80211com *ic)
 614 {
 615         ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
 616 }
 617
 618 void
 619 ieee80211_mesh_detach(struct ieee80211com *ic)
 620 {
 621 }
 622
 623 static void
 624 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
 625 {
 626         struct ieee80211com *ic = ni->ni_ic;
 627         uint16_t args[3];
 628
 629         if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED) {
 630                 args[0] = ni->ni_mlpid;
 631                 args[1] = ni->ni_mllid;
 632                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
 633                 ieee80211_send_action(ni,
 634                     IEEE80211_ACTION_CAT_SELF_PROT,
 635                     IEEE80211_ACTION_MESHPEERING_CLOSE,
 636                     args);
 637         }
 638         callout_drain(&ni->ni_mltimer);
 639         /* XXX belongs in hwmp */
 640         ieee80211_ageq_drain_node(&ic->ic_stageq,
 641            (void *)(uintptr_t) ieee80211_mac_hash(ic, ni->ni_macaddr));
 642 }
 643
 644 static void
 645 mesh_vdetach(struct ieee80211vap *vap)
 646 {
 647         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 648
 649         callout_drain(&ms->ms_cleantimer);
 650         ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
 651             NULL);
 652         ieee80211_mesh_rt_flush(vap);
 653         mtx_destroy(&ms->ms_rt_lock);
 654         ms->ms_ppath->mpp_vdetach(vap);
 655         free(vap->iv_mesh, M_80211_VAP);
 656         vap->iv_mesh = NULL;
 657 }
 658
 659 static void
 660 mesh_vattach(struct ieee80211vap *vap)
 661 {
 662         struct ieee80211_mesh_state *ms;
 663         vap->iv_newstate = mesh_newstate;
 664         vap->iv_input = mesh_input;
 665         vap->iv_opdetach = mesh_vdetach;
 666         vap->iv_recv_mgmt = mesh_recv_mgmt;
 667         vap->iv_recv_ctl = mesh_recv_ctl;
 668         ms = malloc(sizeof(struct ieee80211_mesh_state), M_80211_VAP,
 669             M_NOWAIT | M_ZERO);
 670         if (ms == NULL) {
 671                 printf("%s: couldn't alloc MBSS state\n", __func__);
 672                 return;
 673         }
 674         vap->iv_mesh = ms;
 675         ms->ms_seq = 0;
 676         ms->ms_flags = (IEEE80211_MESHFLAGS_AP | IEEE80211_MESHFLAGS_FWD);
 677         ms->ms_ttl = IEEE80211_MESH_DEFAULT_TTL;
 678         TAILQ_INIT(&ms->ms_known_gates);
 679         TAILQ_INIT(&ms->ms_routes);
 680         mtx_init(&ms->ms_rt_lock, "MBSS", "802.11s routing table", MTX_DEF);
 681         callout_init(&ms->ms_cleantimer, CALLOUT_MPSAFE);
 682         callout_init(&ms->ms_gatetimer, CALLOUT_MPSAFE);
 683         ms->ms_gateseq = 0;
 684         mesh_select_proto_metric(vap, "AIRTIME");
 685         KASSERT(ms->ms_pmetric, ("ms_pmetric == NULL"));
 686         mesh_select_proto_path(vap, "HWMP");
 687         KASSERT(ms->ms_ppath, ("ms_ppath == NULL"));
 688         ms->ms_ppath->mpp_vattach(vap);
 689 }
 690
 691 /*
 692  * IEEE80211_M_MBSS vap state machine handler.
 693  */
 694 static int
 695 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 696 {
 697         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 698         struct ieee80211com *ic = vap->iv_ic;
 699         struct ieee80211_node *ni;
 700         enum ieee80211_state ostate;
 701
 702         IEEE80211_LOCK_ASSERT(ic);
 703
 704         ostate = vap->iv_state;
 705         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 706             __func__, ieee80211_state_name[ostate],
 707             ieee80211_state_name[nstate], arg);
 708         vap->iv_state = nstate;         /* state transition */
 709         if (ostate != IEEE80211_S_SCAN)
 710                 ieee80211_cancel_scan(vap);     /* background scan */
 711         ni = vap->iv_bss;                       /* NB: no reference held */
 712         if (nstate != IEEE80211_S_RUN && ostate == IEEE80211_S_RUN) {
 713                 callout_drain(&ms->ms_cleantimer);
 714                 callout_drain(&ms->ms_gatetimer);
 715         }
 716         switch (nstate) {
 717         case IEEE80211_S_INIT:
 718                 switch (ostate) {
 719                 case IEEE80211_S_SCAN:
 720                         ieee80211_cancel_scan(vap);
 721                         break;
 722                 case IEEE80211_S_CAC:
 723                         ieee80211_dfs_cac_stop(vap);
 724                         break;
 725                 case IEEE80211_S_RUN:
 726                         ieee80211_iterate_nodes(&ic->ic_sta,
 727                             mesh_vdetach_peers, NULL);
 728                         break;
 729                 default:
 730                         break;
 731                 }
 732                 if (ostate != IEEE80211_S_INIT) {
 733                         /* NB: optimize INIT -> INIT case */
 734                         ieee80211_reset_bss(vap);
 735                         ieee80211_mesh_rt_flush(vap);
 736                 }
 737                 break;
 738         case IEEE80211_S_SCAN:
 739                 switch (ostate) {
 740                 case IEEE80211_S_INIT:
 741                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 742                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
 743                             ms->ms_idlen != 0) {
 744                                 /*
 745                                  * Already have a channel and a mesh ID; bypass
 746                                  * the scan and startup immediately.
 747                                  */
 748                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 749                                 break;
 750                         }
 751                         /*
 752                          * Initiate a scan.  We can come here as a result
 753                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 754                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 755                          * and the scan request parameters will be present
 756                          * in iv_scanreq.  Otherwise we do the default.
 757                         */
 758                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 759                                 ieee80211_check_scan(vap,
 760                                     vap->iv_scanreq_flags,
 761                                     vap->iv_scanreq_duration,
 762                                     vap->iv_scanreq_mindwell,
 763                                     vap->iv_scanreq_maxdwell,
 764                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 765                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 766                         } else
 767                                 ieee80211_check_scan_current(vap);
 768                         break;
 769                 default:
 770                         break;
 771                 }
 772                 break;
 773         case IEEE80211_S_CAC:
 774                 /*
 775                  * Start CAC on a DFS channel.  We come here when starting
 776                  * a bss on a DFS channel (see ieee80211_create_ibss).
 777                  */
 778                 ieee80211_dfs_cac_start(vap);
 779                 break;
 780         case IEEE80211_S_RUN:
 781                 switch (ostate) {
 782                 case IEEE80211_S_INIT:
 783                         /*
 784                          * Already have a channel; bypass the
 785                          * scan and startup immediately.
 786                          * Note that ieee80211_create_ibss will call
 787                          * back to do a RUN->RUN state change.
 788                          */
 789                         ieee80211_create_ibss(vap,
 790                             ieee80211_ht_adjust_channel(ic,
 791                                 ic->ic_curchan, vap->iv_flags_ht));
 792                         /* NB: iv_bss is changed on return */
 793                         break;
 794                 case IEEE80211_S_CAC:
 795                         /*
 796                          * NB: This is the normal state change when CAC
 797                          * expires and no radar was detected; no need to
 798                          * clear the CAC timer as it's already expired.
 799                          */
 800                         /* fall thru... */
 801                 case IEEE80211_S_CSA:
 802 #if 0
 803                         /*
 804                          * Shorten inactivity timer of associated stations
 805                          * to weed out sta's that don't follow a CSA.
 806                          */
 807                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 808 #endif
 809                         /*
 810                          * Update bss node channel to reflect where
 811                          * we landed after CSA.
 812                          */
 813                         ieee80211_node_set_chan(vap->iv_bss,
 814                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 815                                 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
 816                         /* XXX bypass debug msgs */
 817                         break;
 818                 case IEEE80211_S_SCAN:
 819                 case IEEE80211_S_RUN:
 820 #ifdef IEEE80211_DEBUG
 821                         if (ieee80211_msg_debug(vap)) {
 822                                 struct ieee80211_node *ni = vap->iv_bss;
 823                                 ieee80211_note(vap,
 824                                     "synchronized with %s meshid ",
 825                                     ether_sprintf(ni->ni_meshid));
 826                                 ieee80211_print_essid(ni->ni_meshid,
 827                                     ni->ni_meshidlen);
 828                                 /* XXX MCS/HT */
 829                                 printf(" channel %d\n",
 830                                     ieee80211_chan2ieee(ic, ic->ic_curchan));
 831                         }
 832 #endif
 833                         break;
 834                 default:
 835                         break;
 836                 }
 837                 ieee80211_node_authorize(vap->iv_bss);
 838                 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 839                     mesh_rt_cleanup_cb, vap);
 840                 mesh_gatemode_setup(vap);
 841                 break;
 842         default:
 843                 break;
 844         }
 845         /* NB: ostate not nstate */
 846         ms->ms_ppath->mpp_newstate(vap, ostate, arg);
 847         return 0;
 848 }
 849
 850 static void
 851 mesh_rt_cleanup_cb(void *arg)
 852 {
 853         struct ieee80211vap *vap = arg;
 854         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 855
 856         mesh_rt_flush_invalid(vap);
 857         callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
 858             mesh_rt_cleanup_cb, vap);
 859 }
 860
 861 /*
 862  * Mark a mesh STA as gate and return a pointer to it.
 863  * If this is first time, we create a new gate route.
 864  * Always update the path route to this mesh gate.
 865  */
 866 struct ieee80211_mesh_gate_route *
 867 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
 868     struct ieee80211_mesh_route *rt)
 869 {
 870         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 871         struct ieee80211_mesh_gate_route *gr = NULL, *next;
 872         int found = 0;
 873
 874         MESH_RT_LOCK(ms);
 875         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
 876                 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
 877                         found = 1;
 878                         break;
 879                 }
 880         }
 881
 882         if (!found) {
 883                 /* New mesh gate add it to known table. */
 884                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, addr,
 885                     "%s", "stored new gate information from pro-PREQ.");
 886                 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
 887                     M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO);
 888                 IEEE80211_ADDR_COPY(gr->gr_addr, addr);
 889                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
 890         }
 891         gr->gr_route = rt;
 892         /* TODO: link from path route to gate route */
 893         MESH_RT_UNLOCK(ms);
 894
 895         return gr;
 896 }
 897
 898
 899 /*
 900  * Helper function to note the Mesh Peer Link FSM change.
 901  */
 902 static void
 903 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
 904 {
 905         struct ieee80211vap *vap = ni->ni_vap;
 906         struct ieee80211_mesh_state *ms = vap->iv_mesh;
 907 #ifdef IEEE80211_DEBUG
 908         static const char *meshlinkstates[] = {
 909                 [IEEE80211_NODE_MESH_IDLE]              = "IDLE",
 910                 [IEEE80211_NODE_MESH_OPENSNT]           = "OPEN SENT",
 911                 [IEEE80211_NODE_MESH_OPENRCV]           = "OPEN RECEIVED",
 912                 [IEEE80211_NODE_MESH_CONFIRMRCV]        = "CONFIRM RECEIVED",
 913                 [IEEE80211_NODE_MESH_ESTABLISHED]       = "ESTABLISHED",
 914                 [IEEE80211_NODE_MESH_HOLDING]           = "HOLDING"
 915         };
 916 #endif
 917         IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
 918             ni, "peer link: %s -> %s",
 919             meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
 920
 921         /* track neighbor count */
 922         if (state == IEEE80211_NODE_MESH_ESTABLISHED &&
 923             ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
 924                 KASSERT(ms->ms_neighbors < 65535, ("neighbor count overflow"));
 925                 ms->ms_neighbors++;
 926                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 927         } else if (ni->ni_mlstate == IEEE80211_NODE_MESH_ESTABLISHED &&
 928             state != IEEE80211_NODE_MESH_ESTABLISHED) {
 929                 KASSERT(ms->ms_neighbors > 0, ("neighbor count 0"));
 930                 ms->ms_neighbors--;
 931                 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
 932         }
 933         ni->ni_mlstate = state;
 934         switch (state) {
 935         case IEEE80211_NODE_MESH_HOLDING:
 936                 ms->ms_ppath->mpp_peerdown(ni);
 937                 break;
 938         case IEEE80211_NODE_MESH_ESTABLISHED:
 939                 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
 940                 break;
 941         default:
 942                 break;
 943         }
 944 }
 945
 946 /*
 947  * Helper function to generate a unique local ID required for mesh
 948  * peer establishment.
 949  */
 950 static void
 951 mesh_checkid(void *arg, struct ieee80211_node *ni)
 952 {
 953         uint16_t *r = arg;
 954
 955         if (*r == ni->ni_mllid)
 956                 *(uint16_t *)arg = 0;
 957 }
 958
 959 static uint32_t
 960 mesh_generateid(struct ieee80211vap *vap)
 961 {
 962         int maxiter = 4;
 963         uint16_t r;
 964
 965         do {
 966                 get_random_bytes(&r, 2);
 967                 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
 968                 maxiter--;
 969         } while (r == 0 && maxiter > 0);
 970         return r;
 971 }
 972
 973 /*
 974  * Verifies if we already received this packet by checking its
 975  * sequence number.
 976  * Returns 0 if the frame is to be accepted, 1 otherwise.
 977  */
 978 static int
 979 mesh_checkpseq(struct ieee80211vap *vap,
 980     const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
 981 {
 982         struct ieee80211_mesh_route *rt;
 983
 984         rt = ieee80211_mesh_rt_find(vap, source);
 985         if (rt == NULL) {
 986                 rt = ieee80211_mesh_rt_add(vap, source);
 987                 if (rt == NULL) {
 988                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 989                             "%s", "add mcast route failed");
 990                         vap->iv_stats.is_mesh_rtaddfailed++;
 991                         return 1;
 992                 }
 993                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
 994                     "add mcast route, mesh seqno %d", seq);
 995                 rt->rt_lastmseq = seq;
 996                 return 0;
 997         }
 998         if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
 999                 return 1;
1000         } else {
1001                 rt->rt_lastmseq = seq;
1002                 return 0;
1003         }
1004 }
1005
1006 /*
1007  * Iterate the routing table and locate the next hop.
1008  */
1009 struct ieee80211_node *
1010 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1011     const uint8_t dest[IEEE80211_ADDR_LEN])
1012 {
1013         struct ieee80211_mesh_route *rt;
1014
1015         rt = ieee80211_mesh_rt_find(vap, dest);
1016         if (rt == NULL)
1017                 return NULL;
1018         if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1019                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1020                     "%s: !valid, flags 0x%x", __func__, rt->rt_flags);
1021                 /* XXX stat */
1022                 return NULL;
1023         }
1024         if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) {
1025                 rt = ieee80211_mesh_rt_find(vap, rt->rt_mesh_gate);
1026                 if (rt == NULL) return NULL;
1027                 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0) {
1028                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
1029                             "%s: meshgate !valid, flags 0x%x", __func__,
1030                             rt->rt_flags);
1031                         /* XXX stat */
1032                         return NULL;
1033                 }
1034         }
1035         return ieee80211_find_txnode(vap, rt->rt_nexthop);
1036 }
1037
1038 static void
1039 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1040     struct ieee80211_mesh_route *rt_gate)
1041 {
1042         struct ifnet *ifp = vap->iv_ifp;
1043         struct ieee80211_node *ni;
1044
1045         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1046
1047         ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
1048         if (ni == NULL) {
1049                 ifp->if_oerrors++;
1050                 m_freem(m);
1051                 return;
1052         }
1053
1054         /*
1055          * Send through the VAP packet transmit path.
1056          * This consumes the node ref grabbed above and
1057          * the mbuf, regardless of whether there's a problem
1058          * or not.
1059          */
1060         (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
1061 }
1062
1063 /*
1064  * Forward the queued frames to known valid mesh gates.
1065  * Assume destination to be outside the MBSS (i.e. proxy entry),
1066  * If no valid mesh gates are known silently discard queued frames.
1067  * After transmitting frames to all known valid mesh gates, this route
1068  * will be marked invalid, and a new path discovery will happen in the hopes
1069  * that (at least) one of the mesh gates have a new proxy entry for us to use.
1070  */
1071 void
1072 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1073     struct ieee80211_mesh_route *rt_dest)
1074 {
1075         struct ieee80211com *ic = vap->iv_ic;
1076         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1077         struct ieee80211_mesh_route *rt_gate;
1078         struct ieee80211_mesh_gate_route *gr = NULL, *gr_next;
1079         struct mbuf *m, *mcopy, *next;
1080
1081         IEEE80211_TX_UNLOCK_ASSERT(ic);
1082
1083         KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1084             ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1085
1086         /* XXX: send to more than one valid mash gate */
1087         MESH_RT_LOCK(ms);
1088
1089         m = ieee80211_ageq_remove(&ic->ic_stageq,
1090             (struct ieee80211_node *)(uintptr_t)
1091             ieee80211_mac_hash(ic, rt_dest->rt_dest));
1092
1093         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, gr_next) {
1094                 rt_gate = gr->gr_route;
1095                 if (rt_gate == NULL) {
1096                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1097                                 rt_dest->rt_dest,
1098                                 "mesh gate with no path %6D",
1099                                 gr->gr_addr, ":");
1100                         continue;
1101                 }
1102                 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
1103                         continue;
1104                 KASSERT(rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_GATE,
1105                     ("route not marked as a mesh gate"));
1106                 KASSERT((rt_gate->rt_flags &
1107                         IEEE80211_MESHRT_FLAGS_PROXY) == 0,
1108                         ("found mesh gate that is also marked porxy"));
1109                 /*
1110                  * convert route to a proxy route gated by the current
1111                  * mesh gate, this is needed so encap can built data
1112                  * frame with correct address.
1113                  */
1114                 rt_dest->rt_flags = IEEE80211_MESHRT_FLAGS_PROXY |
1115                         IEEE80211_MESHRT_FLAGS_VALID;
1116                 rt_dest->rt_ext_seq = 1; /* random value */
1117                 IEEE80211_ADDR_COPY(rt_dest->rt_mesh_gate, rt_gate->rt_dest);
1118                 IEEE80211_ADDR_COPY(rt_dest->rt_nexthop, rt_gate->rt_nexthop);
1119                 rt_dest->rt_metric = rt_gate->rt_metric;
1120                 rt_dest->rt_nhops = rt_gate->rt_nhops;
1121                 ieee80211_mesh_rt_update(rt_dest, ms->ms_ppath->mpp_inact);
1122                 MESH_RT_UNLOCK(ms);
1123                 /* XXX: lock?? */
1124                 mcopy = m_dup(m, M_NOWAIT);
1125                 for (; mcopy != NULL; mcopy = next) {
1126                         next = mcopy->m_nextpkt;
1127                         mcopy->m_nextpkt = NULL;
1128                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_HWMP,
1129                             rt_dest->rt_dest,
1130                             "flush queued frame %p len %d", mcopy,
1131                             mcopy->m_pkthdr.len);
1132                         mesh_transmit_to_gate(vap, mcopy, rt_gate);
1133                 }
1134                 MESH_RT_LOCK(ms);
1135         }
1136         rt_dest->rt_flags = 0; /* Mark invalid */
1137         m_freem(m);
1138         MESH_RT_UNLOCK(ms);
1139 }
1140
1141 /*
1142  * Forward the specified frame.
1143  * Decrement the TTL and set TA to our MAC address.
1144  */
1145 static void
1146 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1147     const struct ieee80211_meshcntl *mc)
1148 {
1149         struct ieee80211com *ic = vap->iv_ic;
1150         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1151         struct ifnet *ifp = vap->iv_ifp;
1152         const struct ieee80211_frame *wh =
1153             mtod(m, const struct ieee80211_frame *);
1154         struct mbuf *mcopy;
1155         struct ieee80211_meshcntl *mccopy;
1156         struct ieee80211_frame *whcopy;
1157         struct ieee80211_node *ni;
1158         int err;
1159
1160         /* This is called from the RX path - don't hold this lock */
1161         IEEE80211_TX_UNLOCK_ASSERT(ic);
1162
1163         /*
1164          * mesh ttl of 1 means we are the last one receving it,
1165          * according to amendment we decrement and then check if
1166          * 0, if so we dont forward.
1167          */
1168         if (mc->mc_ttl < 1) {
1169                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1170                     "%s", "frame not fwd'd, ttl 1");
1171                 vap->iv_stats.is_mesh_fwd_ttl++;
1172                 return;
1173         }
1174         if (!(ms->ms_flags & IEEE80211_MESHFLAGS_FWD)) {
1175                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1176                     "%s", "frame not fwd'd, fwding disabled");
1177                 vap->iv_stats.is_mesh_fwd_disabled++;
1178                 return;
1179         }
1180         mcopy = m_dup(m, M_NOWAIT);
1181         if (mcopy == NULL) {
1182                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1183                     "%s", "frame not fwd'd, cannot dup");
1184                 vap->iv_stats.is_mesh_fwd_nobuf++;
1185                 ifp->if_oerrors++;
1186                 return;
1187         }
1188         mcopy = m_pullup(mcopy, ieee80211_hdrspace(ic, wh) +
1189             sizeof(struct ieee80211_meshcntl));
1190         if (mcopy == NULL) {
1191                 IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1192                     "%s", "frame not fwd'd, too short");
1193                 vap->iv_stats.is_mesh_fwd_tooshort++;
1194                 ifp->if_oerrors++;
1195                 m_freem(mcopy);
1196                 return;
1197         }
1198         whcopy = mtod(mcopy, struct ieee80211_frame *);
1199         mccopy = (struct ieee80211_meshcntl *)
1200             (mtod(mcopy, uint8_t *) + ieee80211_hdrspace(ic, wh));
1201         /* XXX clear other bits? */
1202         whcopy->i_fc[1] &= ~IEEE80211_FC1_RETRY;
1203         IEEE80211_ADDR_COPY(whcopy->i_addr2, vap->iv_myaddr);
1204         if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1205                 ni = ieee80211_ref_node(vap->iv_bss);
1206                 mcopy->m_flags |= M_MCAST;
1207         } else {
1208                 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
1209                 if (ni == NULL) {
1210                         /*
1211                          * [Optional] any of the following three actions:
1212                          * o silently discard
1213                          * o trigger a path discovery
1214                          * o inform TA that meshDA is unknown.
1215                          */
1216                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_MESH, wh,
1217                             "%s", "frame not fwd'd, no path");
1218                         ms->ms_ppath->mpp_senderror(vap, whcopy->i_addr3, NULL,
1219                             IEEE80211_REASON_MESH_PERR_NO_FI);
1220                         vap->iv_stats.is_mesh_fwd_nopath++;
1221                         m_freem(mcopy);
1222                         return;
1223                 }
1224                 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1225         }
1226         KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1227         mccopy->mc_ttl--;
1228
1229         /* XXX calculate priority so drivers can find the tx queue */
1230         M_WME_SETAC(mcopy, WME_AC_BE);
1231
1232         /* XXX do we know m_nextpkt is NULL? */
1233         mcopy->m_pkthdr.rcvif = (void *) ni;
1234
1235         /*
1236          * XXX this bypasses all of the VAP TX handling; it passes frames
1237          * directly to the parent interface.
1238          *
1239          * Because of this, there's no TX lock being held as there's no
1240          * encaps state being used.
1241          *
1242          * Doing a direct parent transmit may not be the correct thing
1243          * to do here; we'll have to re-think this soon.
1244          */
1245         IEEE80211_TX_LOCK(ic);
1246         err = ieee80211_parent_xmitpkt(ic, mcopy);
1247         IEEE80211_TX_UNLOCK(ic);
1248         if (err != 0) {
1249                 /* NB: IFQ_HANDOFF reclaims mbuf */
1250                 ieee80211_free_node(ni);
1251         } else {
1252                 ifp->if_opackets++;
1253         }
1254 }
1255
1256 static struct mbuf *
1257 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
1258 {
1259 #define WHDIR(wh)       ((wh)->i_fc[1] & IEEE80211_FC1_DIR_MASK)
1260 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1261         uint8_t b[sizeof(struct ieee80211_qosframe_addr4) +
1262                   sizeof(struct ieee80211_meshcntl_ae10)];
1263         const struct ieee80211_qosframe_addr4 *wh;
1264         const struct ieee80211_meshcntl_ae10 *mc;
1265         struct ether_header *eh;
1266         struct llc *llc;
1267         int ae;
1268
1269         if (m->m_len < hdrlen + sizeof(*llc) &&
1270             (m = m_pullup(m, hdrlen + sizeof(*llc))) == NULL) {
1271                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_ANY,
1272                     "discard data frame: %s", "m_pullup failed");
1273                 vap->iv_stats.is_rx_tooshort++;
1274                 return NULL;
1275         }
1276         memcpy(b, mtod(m, caddr_t), hdrlen);
1277         wh = (const struct ieee80211_qosframe_addr4 *)&b[0];
1278         mc = (const struct ieee80211_meshcntl_ae10 *)&b[hdrlen - meshdrlen];
1279         KASSERT(WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS ||
1280                 WHDIR(wh) == IEEE80211_FC1_DIR_DSTODS,
1281             ("bogus dir, fc 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1282
1283         llc = (struct llc *)(mtod(m, caddr_t) + hdrlen);
1284         if (llc->llc_dsap == LLC_SNAP_LSAP && llc->llc_ssap == LLC_SNAP_LSAP &&
1285             llc->llc_control == LLC_UI && llc->llc_snap.org_code[0] == 0 &&
1286             llc->llc_snap.org_code[1] == 0 && llc->llc_snap.org_code[2] == 0 &&
1287             /* NB: preserve AppleTalk frames that have a native SNAP hdr */
1288             !(llc->llc_snap.ether_type == htons(ETHERTYPE_AARP) ||
1289               llc->llc_snap.ether_type == htons(ETHERTYPE_IPX))) {
1290                 m_adj(m, hdrlen + sizeof(struct llc) - sizeof(*eh));
1291                 llc = NULL;
1292         } else {
1293                 m_adj(m, hdrlen - sizeof(*eh));
1294         }
1295         eh = mtod(m, struct ether_header *);
1296         ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1297         if (WHDIR(wh) == IEEE80211_FC1_DIR_FROMDS) {
1298                 IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr1);
1299                 if (ae == IEEE80211_MESH_AE_00) {
1300                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr3);
1301                 } else if (ae == IEEE80211_MESH_AE_01) {
1302                         IEEE80211_ADDR_COPY(eh->ether_shost,
1303                             MC01(mc)->mc_addr4);
1304                 } else {
1305                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1306                             (const struct ieee80211_frame *)wh, NULL,
1307                             "bad AE %d", ae);
1308                         vap->iv_stats.is_mesh_badae++;
1309                         m_freem(m);
1310                         return NULL;
1311                 }
1312         } else {
1313                 if (ae == IEEE80211_MESH_AE_00) {
1314                         IEEE80211_ADDR_COPY(eh->ether_dhost, wh->i_addr3);
1315                         IEEE80211_ADDR_COPY(eh->ether_shost, wh->i_addr4);
1316                 } else if (ae == IEEE80211_MESH_AE_10) {
1317                         IEEE80211_ADDR_COPY(eh->ether_dhost, mc->mc_addr5);
1318                         IEEE80211_ADDR_COPY(eh->ether_shost, mc->mc_addr6);
1319                 } else {
1320                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1321                             (const struct ieee80211_frame *)wh, NULL,
1322                             "bad AE %d", ae);
1323                         vap->iv_stats.is_mesh_badae++;
1324                         m_freem(m);
1325                         return NULL;
1326                 }
1327         }
1328 #ifndef __NO_STRICT_ALIGNMENT
1329         if (!ALIGNED_POINTER(mtod(m, caddr_t) + sizeof(*eh), uint32_t)) {
1330                 m = ieee80211_realign(vap, m, sizeof(*eh));
1331                 if (m == NULL)
1332                         return NULL;
1333         }
1334 #endif /* !__NO_STRICT_ALIGNMENT */
1335         if (llc != NULL) {
1336                 eh = mtod(m, struct ether_header *);
1337                 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
1338         }
1339         return m;
1340 #undef  WDIR
1341 #undef  MC01
1342 }
1343
1344 /*
1345  * Return non-zero if the unicast mesh data frame should be processed
1346  * locally.  Frames that are not proxy'd have our address, otherwise
1347  * we need to consult the routing table to look for a proxy entry.
1348  */
1349 static __inline int
1350 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1351     const struct ieee80211_meshcntl *mc)
1352 {
1353         int ae = mc->mc_flags & 3;
1354
1355         KASSERT((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS,
1356             ("bad dir 0x%x:0x%x", wh->i_fc[0], wh->i_fc[1]));
1357         KASSERT(ae == IEEE80211_MESH_AE_00 || ae == IEEE80211_MESH_AE_10,
1358             ("bad AE %d", ae));
1359         if (ae == IEEE80211_MESH_AE_10) {       /* ucast w/ proxy */
1360                 const struct ieee80211_meshcntl_ae10 *mc10 =
1361                     (const struct ieee80211_meshcntl_ae10 *) mc;
1362                 struct ieee80211_mesh_route *rt =
1363                     ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1364                 /* check for proxy route to ourself */
1365                 return (rt != NULL &&
1366                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY));
1367         } else                                  /* ucast w/o proxy */
1368                 return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
1369 }
1370
1371 /*
1372  * Verifies transmitter, updates lifetime, precursor list and forwards data.
1373  * > 0 means we have forwarded data and no need to process locally
1374  * == 0 means we want to process locally (and we may have forwarded data
1375  * < 0 means there was an error and data should be discarded
1376  */
1377 static int
1378 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1379     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1380 {
1381         struct ieee80211_qosframe_addr4 *qwh;
1382         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1383         struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1384
1385         /* This is called from the RX path - don't hold this lock */
1386         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1387
1388         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1389
1390         /*
1391          * TODO:
1392          * o verify addr2 is  a legitimate transmitter
1393          * o lifetime of precursor of addr3 (addr2) is max(init, curr)
1394          * o lifetime of precursor of addr4 (nexthop) is max(init, curr)
1395          */
1396
1397         /* set lifetime of addr3 (meshDA) to initial value */
1398         rt_meshda = ieee80211_mesh_rt_find(vap, qwh->i_addr3);
1399         if (rt_meshda == NULL) {
1400                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, qwh->i_addr2,
1401                     "no route to meshDA(%6D)", qwh->i_addr3, ":");
1402                 /*
1403                  * [Optional] any of the following three actions:
1404                  * o silently discard                           [X]
1405                  * o trigger a path discovery                   [ ]
1406                  * o inform TA that meshDA is unknown.          [ ]
1407                  */
1408                 /* XXX: stats */
1409                 return (-1);
1410         }
1411
1412         ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1413             ms->ms_ppath->mpp_inact));
1414
1415         /* set lifetime of addr4 (meshSA) to initial value */
1416         rt_meshsa = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1417         KASSERT(rt_meshsa != NULL, ("no route"));
1418         ieee80211_mesh_rt_update(rt_meshsa, ticks_to_msecs(
1419             ms->ms_ppath->mpp_inact));
1420
1421         mesh_forward(vap, m, mc);
1422         return (1); /* dont process locally */
1423 }
1424
1425 /*
1426  * Verifies transmitter, updates lifetime, precursor list and process data
1427  * locally, if data is proxy with AE = 10 it could mean data should go
1428  * on another mesh path or data should be forwarded to the DS.
1429  *
1430  * > 0 means we have forwarded data and no need to process locally
1431  * == 0 means we want to process locally (and we may have forwarded data
1432  * < 0 means there was an error and data should be discarded
1433  */
1434 static int
1435 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1436     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1437 {
1438         struct ieee80211_qosframe_addr4 *qwh;
1439         const struct ieee80211_meshcntl_ae10 *mc10;
1440         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1441         struct ieee80211_mesh_route *rt;
1442         int ae;
1443
1444         /* This is called from the RX path - don't hold this lock */
1445         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1446
1447         qwh = (struct ieee80211_qosframe_addr4 *)wh;
1448         mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1449
1450         /*
1451          * TODO:
1452          * o verify addr2 is  a legitimate transmitter
1453          * o lifetime of precursor entry is max(init, curr)
1454          */
1455
1456         /* set lifetime of addr4 (meshSA) to initial value */
1457         rt = ieee80211_mesh_rt_find(vap, qwh->i_addr4);
1458         KASSERT(rt != NULL, ("no route"));
1459         ieee80211_mesh_rt_update(rt, ticks_to_msecs(ms->ms_ppath->mpp_inact));
1460         rt = NULL;
1461
1462         ae = mc10->mc_flags & IEEE80211_MESH_AE_MASK;
1463         KASSERT(ae == IEEE80211_MESH_AE_00 ||
1464             ae == IEEE80211_MESH_AE_10, ("bad AE %d", ae));
1465         if (ae == IEEE80211_MESH_AE_10) {
1466                 if (IEEE80211_ADDR_EQ(mc10->mc_addr5, qwh->i_addr3)) {
1467                         return (0); /* process locally */
1468                 }
1469
1470                 rt =  ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1471                 if (rt != NULL &&
1472                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1473                     (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1474                         /*
1475                          * Forward on another mesh-path, according to
1476                          * amendment as specified in 9.32.4.1
1477                          */
1478                         IEEE80211_ADDR_COPY(qwh->i_addr3, mc10->mc_addr5);
1479                         mesh_forward(vap, m,
1480                             (const struct ieee80211_meshcntl *)mc10);
1481                         return (1); /* dont process locally */
1482                 }
1483                 /*
1484                  * All other cases: forward of MSDUs from the MBSS to DS indiv.
1485                  * addressed according to 13.11.3.2.
1486                  */
1487                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_OUTPUT, qwh->i_addr2,
1488                     "forward frame to DS, SA(%6D) DA(%6D)",
1489                     mc10->mc_addr6, ":", mc10->mc_addr5, ":");
1490         }
1491         return (0); /* process locally */
1492 }
1493
1494 /*
1495  * Try to forward the group addressed data on to other mesh STAs, and
1496  * also to the DS.
1497  *
1498  * > 0 means we have forwarded data and no need to process locally
1499  * == 0 means we want to process locally (and we may have forwarded data
1500  * < 0 means there was an error and data should be discarded
1501  */
1502 static int
1503 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1504     struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1505 {
1506 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1507         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1508
1509         /* This is called from the RX path - don't hold this lock */
1510         IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1511
1512         mesh_forward(vap, m, mc);
1513
1514         if(mc->mc_ttl > 0) {
1515                 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
1516                         /*
1517                          * Forward of MSDUs from the MBSS to DS group addressed
1518                          * (according to 13.11.3.2)
1519                          * This happens by delivering the packet, and a bridge
1520                          * will sent it on another port member.
1521                          */
1522                         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE &&
1523                             ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
1524                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH,
1525                                     MC01(mc)->mc_addr4, "%s",
1526                                     "forward from MBSS to the DS");
1527                 }
1528         }
1529         return (0); /* process locally */
1530 #undef  MC01
1531 }
1532
1533 static int
1534 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
1535 {
1536 #define HAS_SEQ(type)   ((type & 0x4) == 0)
1537 #define MC01(mc)        ((const struct ieee80211_meshcntl_ae01 *)mc)
1538 #define MC10(mc)        ((const struct ieee80211_meshcntl_ae10 *)mc)
1539         struct ieee80211vap *vap = ni->ni_vap;
1540         struct ieee80211com *ic = ni->ni_ic;
1541         struct ifnet *ifp = vap->iv_ifp;
1542         struct ieee80211_frame *wh;
1543         const struct ieee80211_meshcntl *mc;
1544         int hdrspace, meshdrlen, need_tap, error;
1545         uint8_t dir, type, subtype, ae;
1546         uint32_t seq;
1547         const uint8_t *addr;
1548         uint8_t qos[2];
1549         ieee80211_seq rxseq;
1550
1551         KASSERT(ni != NULL, ("null node"));
1552         ni->ni_inact = ni->ni_inact_reload;
1553
1554         need_tap = 1;                   /* mbuf need to be tapped. */
1555         type = -1;                      /* undefined */
1556
1557         /* This is called from the RX path - don't hold this lock */
1558         IEEE80211_TX_UNLOCK_ASSERT(ic);
1559
1560         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
1561                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1562                     ni->ni_macaddr, NULL,
1563                     "too short (1): len %u", m->m_pkthdr.len);
1564                 vap->iv_stats.is_rx_tooshort++;
1565                 goto out;
1566         }
1567         /*
1568          * Bit of a cheat here, we use a pointer for a 3-address
1569          * frame format but don't reference fields past outside
1570          * ieee80211_frame_min w/o first validating the data is
1571          * present.
1572         */
1573         wh = mtod(m, struct ieee80211_frame *);
1574
1575         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
1576             IEEE80211_FC0_VERSION_0) {
1577                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1578                     ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
1579                 vap->iv_stats.is_rx_badversion++;
1580                 goto err;
1581         }
1582         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
1583         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
1584         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1585         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1586                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1587                 ni->ni_noise = nf;
1588                 if (HAS_SEQ(type)) {
1589                         uint8_t tid = ieee80211_gettid(wh);
1590
1591                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
1592                             TID_TO_WME_AC(tid) >= WME_AC_VI)
1593                                 ic->ic_wme.wme_hipri_traffic++;
1594                         rxseq = le16toh(*(uint16_t *)wh->i_seq);
1595                         if (! ieee80211_check_rxseq(ni, wh)) {
1596                                 /* duplicate, discard */
1597                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1598                                     wh->i_addr1, "duplicate",
1599                                     "seqno <%u,%u> fragno <%u,%u> tid %u",
1600                                     rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
1601                                     ni->ni_rxseqs[tid] >>
1602                                     IEEE80211_SEQ_SEQ_SHIFT,
1603                                     rxseq & IEEE80211_SEQ_FRAG_MASK,
1604                                     ni->ni_rxseqs[tid] &
1605                                     IEEE80211_SEQ_FRAG_MASK,
1606                                     tid);
1607                                 vap->iv_stats.is_rx_dup++;
1608                                 IEEE80211_NODE_STAT(ni, rx_dup);
1609                                 goto out;
1610                         }
1611                         ni->ni_rxseqs[tid] = rxseq;
1612                 }
1613         }
1614 #ifdef IEEE80211_DEBUG
1615         /*
1616          * It's easier, but too expensive, to simulate different mesh
1617          * topologies by consulting the ACL policy very early, so do this
1618          * only under DEBUG.
1619          *
1620          * NB: this check is also done upon peering link initiation.
1621          */
1622         if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1623                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1624                     wh, NULL, "%s", "disallowed by ACL");
1625                 vap->iv_stats.is_rx_acl++;
1626                 goto out;
1627         }
1628 #endif
1629         switch (type) {
1630         case IEEE80211_FC0_TYPE_DATA:
1631                 if (ni == vap->iv_bss)
1632                         goto out;
1633                 if (ni->ni_mlstate != IEEE80211_NODE_MESH_ESTABLISHED) {
1634                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1635                             ni->ni_macaddr, NULL,
1636                             "peer link not yet established (%d)",
1637                             ni->ni_mlstate);
1638                         vap->iv_stats.is_mesh_nolink++;
1639                         goto out;
1640                 }
1641                 if (dir != IEEE80211_FC1_DIR_FROMDS &&
1642                     dir != IEEE80211_FC1_DIR_DSTODS) {
1643                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1644                             wh, "data", "incorrect dir 0x%x", dir);
1645                         vap->iv_stats.is_rx_wrongdir++;
1646                         goto err;
1647                 }
1648
1649                 /* All Mesh data frames are QoS subtype */
1650                 if (!HAS_SEQ(type)) {
1651                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1652                             wh, "data", "incorrect subtype 0x%x", subtype);
1653                         vap->iv_stats.is_rx_badsubtype++;
1654                         goto err;
1655                 }
1656
1657                 /*
1658                  * Next up, any fragmentation.
1659                  * XXX: we defrag before we even try to forward,
1660                  * Mesh Control field is not present in sub-sequent
1661                  * fragmented frames. This is in contrast to Draft 4.0.
1662                  */
1663                 hdrspace = ieee80211_hdrspace(ic, wh);
1664                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1665                         m = ieee80211_defrag(ni, m, hdrspace);
1666                         if (m == NULL) {
1667                                 /* Fragment dropped or frame not complete yet */
1668                                 goto out;
1669                         }
1670                 }
1671                 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1672
1673                 /*
1674                  * Now we have a complete Mesh Data frame.
1675                  */
1676
1677                 /*
1678                  * Only fromDStoDS data frames use 4 address qos frames
1679                  * as specified in amendment. Otherwise addr4 is located
1680                  * in the Mesh Control field and a 3 address qos frame
1681                  * is used.
1682                  */
1683                 if (IEEE80211_IS_DSTODS(wh))
1684                         *(uint16_t *)qos = *(uint16_t *)
1685                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos;
1686                 else
1687                         *(uint16_t *)qos = *(uint16_t *)
1688                             ((struct ieee80211_qosframe *)wh)->i_qos;
1689
1690                 /*
1691                  * NB: The mesh STA sets the Mesh Control Present
1692                  * subfield to 1 in the Mesh Data frame containing
1693                  * an unfragmented MSDU, an A-MSDU, or the first
1694                  * fragment of an MSDU.
1695                  * After defrag it should always be present.
1696                  */
1697                 if (!(qos[1] & IEEE80211_QOS_MC)) {
1698                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
1699                             ni->ni_macaddr, NULL,
1700                             "%s", "Mesh control field not present");
1701                         vap->iv_stats.is_rx_elem_missing++; /* XXX: kinda */
1702                         goto err;
1703                 }
1704
1705                 /* pull up enough to get to the mesh control */
1706                 if (m->m_len < hdrspace + sizeof(struct ieee80211_meshcntl) &&
1707                     (m = m_pullup(m, hdrspace +
1708                         sizeof(struct ieee80211_meshcntl))) == NULL) {
1709                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1710                             ni->ni_macaddr, NULL,
1711                             "data too short: expecting %u", hdrspace);
1712                         vap->iv_stats.is_rx_tooshort++;
1713                         goto out;               /* XXX */
1714                 }
1715                 /*
1716                  * Now calculate the full extent of the headers. Note
1717                  * mesh_decap will pull up anything we didn't get
1718                  * above when it strips the 802.11 headers.
1719                  */
1720                 mc = (const struct ieee80211_meshcntl *)
1721                     (mtod(m, const uint8_t *) + hdrspace);
1722                 ae = mc->mc_flags & IEEE80211_MESH_AE_MASK;
1723                 meshdrlen = sizeof(struct ieee80211_meshcntl) +
1724                     ae * IEEE80211_ADDR_LEN;
1725                 hdrspace += meshdrlen;
1726
1727                 /* pull complete hdrspace = ieee80211_hdrspace + meshcontrol */
1728                 if ((meshdrlen > sizeof(struct ieee80211_meshcntl)) &&
1729                     (m->m_len < hdrspace) &&
1730                     ((m = m_pullup(m, hdrspace)) == NULL)) {
1731                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1732                             ni->ni_macaddr, NULL,
1733                             "data too short: expecting %u", hdrspace);
1734                         vap->iv_stats.is_rx_tooshort++;
1735                         goto out;               /* XXX */
1736                 }
1737                 /* XXX: are we sure there is no reallocating after m_pullup? */
1738
1739                 seq = LE_READ_4(mc->mc_seq);
1740                 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1741                         addr = wh->i_addr3;
1742                 else if (ae == IEEE80211_MESH_AE_01)
1743                         addr = MC01(mc)->mc_addr4;
1744                 else
1745                         addr = ((struct ieee80211_qosframe_addr4 *)wh)->i_addr4;
1746                 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, addr)) {
1747                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1748                             addr, "data", "%s", "not to me");
1749                         vap->iv_stats.is_rx_wrongbss++; /* XXX kinda */
1750                         goto out;
1751                 }
1752                 if (mesh_checkpseq(vap, addr, seq) != 0) {
1753                         vap->iv_stats.is_rx_dup++;
1754                         goto out;
1755                 }
1756
1757                 /* This code "routes" the frame to the right control path */
1758                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1759                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr3))
1760                                 error =
1761                                     mesh_recv_indiv_data_to_me(vap, m, wh, mc);
1762                         else if (IEEE80211_IS_MULTICAST(wh->i_addr3))
1763                                 error = mesh_recv_group_data(vap, m, wh, mc);
1764                         else
1765                                 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1766                                     wh, mc);
1767                 } else
1768                         error = mesh_recv_group_data(vap, m, wh, mc);
1769                 if (error < 0)
1770                         goto err;
1771                 else if (error > 0)
1772                         goto out;
1773
1774                 if (ieee80211_radiotap_active_vap(vap))
1775                         ieee80211_radiotap_rx(vap, m);
1776                 need_tap = 0;
1777
1778                 /*
1779                  * Finally, strip the 802.11 header.
1780                  */
1781                 m = mesh_decap(vap, m, hdrspace, meshdrlen);
1782                 if (m == NULL) {
1783                         /* XXX mask bit to check for both */
1784                         /* don't count Null data frames as errors */
1785                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
1786                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
1787                                 goto out;
1788                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
1789                             ni->ni_macaddr, "data", "%s", "decap error");
1790                         vap->iv_stats.is_rx_decap++;
1791                         IEEE80211_NODE_STAT(ni, rx_decap);
1792                         goto err;
1793                 }
1794                 if (qos[0] & IEEE80211_QOS_AMSDU) {
1795                         m = ieee80211_decap_amsdu(ni, m);
1796                         if (m == NULL)
1797                                 return IEEE80211_FC0_TYPE_DATA;
1798                 }
1799                 ieee80211_deliver_data(vap, ni, m);
1800                 return type;
1801         case IEEE80211_FC0_TYPE_MGT:
1802                 vap->iv_stats.is_rx_mgmt++;
1803                 IEEE80211_NODE_STAT(ni, rx_mgmt);
1804                 if (dir != IEEE80211_FC1_DIR_NODS) {
1805                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1806                             wh, "mgt", "incorrect dir 0x%x", dir);
1807                         vap->iv_stats.is_rx_wrongdir++;
1808                         goto err;
1809                 }
1810                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
1811                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
1812                             ni->ni_macaddr, "mgt", "too short: len %u",
1813                             m->m_pkthdr.len);
1814                         vap->iv_stats.is_rx_tooshort++;
1815                         goto out;
1816                 }
1817 #ifdef IEEE80211_DEBUG
1818                 if ((ieee80211_msg_debug(vap) &&
1819                     (vap->iv_ic->ic_flags & IEEE80211_F_SCAN)) ||
1820                     ieee80211_msg_dumppkts(vap)) {
1821                         if_printf(ifp, "received %s from %s rssi %d\n",
1822                             ieee80211_mgt_subtype_name[subtype >>
1823                             IEEE80211_FC0_SUBTYPE_SHIFT],
1824                             ether_sprintf(wh->i_addr2), rssi);
1825                 }
1826 #endif
1827                 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1828                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1829                             wh, NULL, "%s", "WEP set but not permitted");
1830                         vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
1831                         goto out;
1832                 }
1833                 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
1834                 goto out;
1835         case IEEE80211_FC0_TYPE_CTL:
1836                 vap->iv_stats.is_rx_ctl++;
1837                 IEEE80211_NODE_STAT(ni, rx_ctrl);
1838                 goto out;
1839         default:
1840                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1841                     wh, "bad", "frame type 0x%x", type);
1842                 /* should not come here */
1843                 break;
1844         }
1845 err:
1846         ifp->if_ierrors++;
1847 out:
1848         if (m != NULL) {
1849                 if (need_tap && ieee80211_radiotap_active_vap(vap))
1850                         ieee80211_radiotap_rx(vap, m);
1851                 m_freem(m);
1852         }
1853         return type;
1854 #undef  HAS_SEQ
1855 #undef  MC01
1856 #undef  MC10
1857 }
1858
1859 static void
1860 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
1861     int rssi, int nf)
1862 {
1863         struct ieee80211vap *vap = ni->ni_vap;
1864         struct ieee80211_mesh_state *ms = vap->iv_mesh;
1865         struct ieee80211com *ic = ni->ni_ic;
1866         struct ieee80211_frame *wh;
1867         struct ieee80211_mesh_route *rt;
1868         uint8_t *frm, *efrm;
1869
1870         wh = mtod(m0, struct ieee80211_frame *);
1871         frm = (uint8_t *)&wh[1];
1872         efrm = mtod(m0, uint8_t *) + m0->m_len;
1873         switch (subtype) {
1874         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1875         case IEEE80211_FC0_SUBTYPE_BEACON:
1876         {
1877                 struct ieee80211_scanparams scan;
1878                 /*
1879                  * We process beacon/probe response
1880                  * frames to discover neighbors.
1881                  */
1882                 if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
1883                         return;
1884                 /*
1885                  * Count frame now that we know it's to be processed.
1886                  */
1887                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1888                         vap->iv_stats.is_rx_beacon++;   /* XXX remove */
1889                         IEEE80211_NODE_STAT(ni, rx_beacons);
1890                 } else
1891                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1892                 /*
1893                  * If scanning, just pass information to the scan module.
1894                  */
1895                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1896                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1897                                 /*
1898                                  * Actively scanning a channel marked passive;
1899                                  * send a probe request now that we know there
1900                                  * is 802.11 traffic present.
1901                                  *
1902                                  * XXX check if the beacon we recv'd gives
1903                                  * us what we need and suppress the probe req
1904                                  */
1905                                 ieee80211_probe_curchan(vap, 1);
1906                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1907                         }
1908                         ieee80211_add_scan(vap, &scan, wh,
1909                             subtype, rssi, nf);
1910                         return;
1911                 }
1912
1913                 /* The rest of this code assumes we are running */
1914                 if (vap->iv_state != IEEE80211_S_RUN)
1915                         return;
1916                 /*
1917                  * Ignore non-mesh STAs.
1918                  */
1919                 if ((scan.capinfo &
1920                      (IEEE80211_CAPINFO_ESS|IEEE80211_CAPINFO_IBSS)) ||
1921                     scan.meshid == NULL || scan.meshconf == NULL) {
1922                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1923                             wh, "beacon", "%s", "not a mesh sta");
1924                         vap->iv_stats.is_mesh_wrongmesh++;
1925                         return;
1926                 }
1927                 /*
1928                  * Ignore STAs for other mesh networks.
1929                  */
1930                 if (memcmp(scan.meshid+2, ms->ms_id, ms->ms_idlen) != 0 ||
1931                     mesh_verify_meshconf(vap, scan.meshconf)) {
1932                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1933                             wh, "beacon", "%s", "not for our mesh");
1934                         vap->iv_stats.is_mesh_wrongmesh++;
1935                         return;
1936                 }
1937                 /*
1938                  * Peer only based on the current ACL policy.
1939                  */
1940                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1941                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1942                             wh, NULL, "%s", "disallowed by ACL");
1943                         vap->iv_stats.is_rx_acl++;
1944                         return;
1945                 }
1946                 /*
1947                  * Do neighbor discovery.
1948                  */
1949                 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1950                         /*
1951                          * Create a new entry in the neighbor table.
1952                          */
1953                         ni = ieee80211_add_neighbor(vap, wh, &scan);
1954                 }
1955                 /*
1956                  * Automatically peer with discovered nodes if possible.
1957                  */
1958                 if (ni != vap->iv_bss &&
1959                     (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1960                         switch (ni->ni_mlstate) {
1961                         case IEEE80211_NODE_MESH_IDLE:
1962                         {
1963                                 uint16_t args[1];
1964
1965                                 /* Wait for backoff callout to reset counter */
1966                                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1967                                         return;
1968
1969                                 ni->ni_mlpid = mesh_generateid(vap);
1970                                 if (ni->ni_mlpid == 0)
1971                                         return;
1972                                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENSNT);
1973                                 args[0] = ni->ni_mlpid;
1974                                 ieee80211_send_action(ni,
1975                                 IEEE80211_ACTION_CAT_SELF_PROT,
1976                                 IEEE80211_ACTION_MESHPEERING_OPEN, args);
1977                                 ni->ni_mlrcnt = 0;
1978                                 mesh_peer_timeout_setup(ni);
1979                                 break;
1980                         }
1981                         case IEEE80211_NODE_MESH_ESTABLISHED:
1982                         {
1983                                 /*
1984                                  * Valid beacon from a peer mesh STA
1985                                  * bump TA lifetime
1986                                  */
1987                                 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1988                                 if(rt != NULL) {
1989                                         ieee80211_mesh_rt_update(rt,
1990                                             ticks_to_msecs(
1991                                             ms->ms_ppath->mpp_inact));
1992                                 }
1993                                 break;
1994                         }
1995                         default:
1996                                 break; /* ignore */
1997                         }
1998                 }
1999                 break;
2000         }
2001         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
2002         {
2003                 uint8_t *ssid, *meshid, *rates, *xrates;
2004                 uint8_t *sfrm;
2005
2006                 if (vap->iv_state != IEEE80211_S_RUN) {
2007                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2008                             wh, NULL, "wrong state %s",
2009                             ieee80211_state_name[vap->iv_state]);
2010                         vap->iv_stats.is_rx_mgtdiscard++;
2011                         return;
2012                 }
2013                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
2014                         /* frame must be directed */
2015                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2016                             wh, NULL, "%s", "not unicast");
2017                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
2018                         return;
2019                 }
2020                 /*
2021                  * prreq frame format
2022                  *      [tlv] ssid
2023                  *      [tlv] supported rates
2024                  *      [tlv] extended supported rates
2025                  *      [tlv] mesh id
2026                  */
2027                 ssid = meshid = rates = xrates = NULL;
2028                 sfrm = frm;
2029                 while (efrm - frm > 1) {
2030                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2031                         switch (*frm) {
2032                         case IEEE80211_ELEMID_SSID:
2033                                 ssid = frm;
2034                                 break;
2035                         case IEEE80211_ELEMID_RATES:
2036                                 rates = frm;
2037                                 break;
2038                         case IEEE80211_ELEMID_XRATES:
2039                                 xrates = frm;
2040                                 break;
2041                         case IEEE80211_ELEMID_MESHID:
2042                                 meshid = frm;
2043                                 break;
2044                         }
2045                         frm += frm[1] + 2;
2046                 }
2047                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2048                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2049                 if (xrates != NULL)
2050                         IEEE80211_VERIFY_ELEMENT(xrates,
2051                             IEEE80211_RATE_MAXSIZE - rates[1], return);
2052                 if (meshid != NULL) {
2053                         IEEE80211_VERIFY_ELEMENT(meshid,
2054                             IEEE80211_MESHID_LEN, return);
2055                         /* NB: meshid, not ssid */
2056                         IEEE80211_VERIFY_SSID(vap->iv_bss, meshid, return);
2057                 }
2058
2059                 /* XXX find a better class or define it's own */
2060                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
2061                     "%s", "recv probe req");
2062                 /*
2063                  * Some legacy 11b clients cannot hack a complete
2064                  * probe response frame.  When the request includes
2065                  * only a bare-bones rate set, communicate this to
2066                  * the transmit side.
2067                  */
2068                 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
2069                 break;
2070         }
2071
2072         case IEEE80211_FC0_SUBTYPE_ACTION:
2073         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2074                 if (ni == vap->iv_bss) {
2075                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2076                             wh, NULL, "%s", "unknown node");
2077                         vap->iv_stats.is_rx_mgtdiscard++;
2078                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2079                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2080                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2081                             wh, NULL, "%s", "not for us");
2082                         vap->iv_stats.is_rx_mgtdiscard++;
2083                 } else if (vap->iv_state != IEEE80211_S_RUN) {
2084                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2085                             wh, NULL, "wrong state %s",
2086                             ieee80211_state_name[vap->iv_state]);
2087                         vap->iv_stats.is_rx_mgtdiscard++;
2088                 } else {
2089                         if (ieee80211_parse_action(ni, m0) == 0)
2090                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2091                 }
2092                 break;
2093
2094         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
2095         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2096         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
2097         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2098         case IEEE80211_FC0_SUBTYPE_ATIM:
2099         case IEEE80211_FC0_SUBTYPE_DISASSOC:
2100         case IEEE80211_FC0_SUBTYPE_AUTH:
2101         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2102                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2103                     wh, NULL, "%s", "not handled");
2104                 vap->iv_stats.is_rx_mgtdiscard++;
2105                 break;
2106
2107         default:
2108                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2109                     wh, "mgt", "subtype 0x%x not handled", subtype);
2110                 vap->iv_stats.is_rx_badsubtype++;
2111                 break;
2112         }
2113 }
2114
2115 static void
2116 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2117 {
2118
2119         switch (subtype) {
2120         case IEEE80211_FC0_SUBTYPE_BAR:
2121                 ieee80211_recv_bar(ni, m);
2122                 break;
2123         }
2124 }
2125
2126 /*
2127  * Parse meshpeering action ie's for MPM frames
2128  */
2129 static const struct ieee80211_meshpeer_ie *
2130 mesh_parse_meshpeering_action(struct ieee80211_node *ni,
2131         const struct ieee80211_frame *wh,       /* XXX for VERIFY_LENGTH */
2132         const uint8_t *frm, const uint8_t *efrm,
2133         struct ieee80211_meshpeer_ie *mp, uint8_t subtype)
2134 {
2135         struct ieee80211vap *vap = ni->ni_vap;
2136         const struct ieee80211_meshpeer_ie *mpie;
2137         uint16_t args[3];
2138         const uint8_t *meshid, *meshconf, *meshpeer;
2139         uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2140
2141         meshid = meshconf = meshpeer = NULL;
2142         while (efrm - frm > 1) {
2143                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2144                 switch (*frm) {
2145                 case IEEE80211_ELEMID_MESHID:
2146                         meshid = frm;
2147                         break;
2148                 case IEEE80211_ELEMID_MESHCONF:
2149                         meshconf = frm;
2150                         break;
2151                 case IEEE80211_ELEMID_MESHPEER:
2152                         meshpeer = frm;
2153                         mpie = (const struct ieee80211_meshpeer_ie *) frm;
2154                         memset(mp, 0, sizeof(*mp));
2155                         mp->peer_len = mpie->peer_len;
2156                         mp->peer_proto = LE_READ_2(&mpie->peer_proto);
2157                         mp->peer_llinkid = LE_READ_2(&mpie->peer_llinkid);
2158                         switch (subtype) {
2159                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2160                                 mp->peer_linkid =
2161                                     LE_READ_2(&mpie->peer_linkid);
2162                                 break;
2163                         case IEEE80211_ACTION_MESHPEERING_CLOSE:
2164                                 /* NB: peer link ID is optional */
2165                                 if (mpie->peer_len ==
2166                                     (IEEE80211_MPM_BASE_SZ + 2)) {
2167                                         mp->peer_linkid = 0;
2168                                         mp->peer_rcode =
2169                                             LE_READ_2(&mpie->peer_linkid);
2170                                 } else {
2171                                         mp->peer_linkid =
2172                                             LE_READ_2(&mpie->peer_linkid);
2173                                         mp->peer_rcode =
2174                                             LE_READ_2(&mpie->peer_rcode);
2175                                 }
2176                                 break;
2177                         }
2178                         break;
2179                 }
2180                 frm += frm[1] + 2;
2181         }
2182
2183         /*
2184          * Verify the contents of the frame.
2185          * If it fails validation, close the peer link.
2186          */
2187         if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2188                 sendclose = 1;
2189                 IEEE80211_DISCARD(vap,
2190                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2191                     wh, NULL, "%s", "MPM validation failed");
2192         }
2193
2194         /* If meshid is not the same reject any frames type. */
2195         if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
2196                 sendclose = 1;
2197                 IEEE80211_DISCARD(vap,
2198                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2199                     wh, NULL, "%s", "not for our mesh");
2200                 if (subtype == IEEE80211_ACTION_MESHPEERING_CLOSE) {
2201                         /*
2202                          * Standard not clear about this, if we dont ignore
2203                          * there will be an endless loop between nodes sending
2204                          * CLOSE frames between each other with wrong meshid.
2205                          * Discard and timers will bring FSM to IDLE state.
2206                          */
2207                         return NULL;
2208                 }
2209         }
2210
2211         /*
2212          * Close frames are accepted if meshid is the same.
2213          * Verify the other two types.
2214          */
2215         if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2216             mesh_verify_meshconf(vap, meshconf)) {
2217                 sendclose = 1;
2218                 IEEE80211_DISCARD(vap,
2219                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2220                     wh, NULL, "%s", "configuration missmatch");
2221         }
2222
2223         if (sendclose) {
2224                 vap->iv_stats.is_rx_mgtdiscard++;
2225                 switch (ni->ni_mlstate) {
2226                 case IEEE80211_NODE_MESH_IDLE:
2227                 case IEEE80211_NODE_MESH_ESTABLISHED:
2228                 case IEEE80211_NODE_MESH_HOLDING:
2229                         /* ignore */
2230                         break;
2231                 case IEEE80211_NODE_MESH_OPENSNT:
2232                 case IEEE80211_NODE_MESH_OPENRCV:
2233                 case IEEE80211_NODE_MESH_CONFIRMRCV:
2234                         args[0] = ni->ni_mlpid;
2235                         args[1] = ni->ni_mllid;
2236                         /* Reason codes for rejection */
2237                         switch (subtype) {
2238                         case IEEE80211_ACTION_MESHPEERING_OPEN:
2239                                 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2240                                 break;
2241                         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2242                                 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2243                                 break;
2244                         }
2245                         ieee80211_send_action(ni,
2246                             IEEE80211_ACTION_CAT_SELF_PROT,
2247                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2248                             args);
2249                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2250                         mesh_peer_timeout_setup(ni);
2251                         break;
2252                 }
2253                 return NULL;
2254         }
2255
2256         return (const struct ieee80211_meshpeer_ie *) mp;
2257 }
2258
2259 static int
2260 mesh_recv_action_meshpeering_open(struct ieee80211_node *ni,
2261         const struct ieee80211_frame *wh,
2262         const uint8_t *frm, const uint8_t *efrm)
2263 {
2264         struct ieee80211vap *vap = ni->ni_vap;
2265         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2266         struct ieee80211_meshpeer_ie ie;
2267         const struct ieee80211_meshpeer_ie *meshpeer;
2268         uint16_t args[3];
2269
2270         /* +2+2 for action + code + capabilites */
2271         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2, efrm, &ie,
2272             IEEE80211_ACTION_MESHPEERING_OPEN);
2273         if (meshpeer == NULL) {
2274                 return 0;
2275         }
2276
2277         /* XXX move up */
2278         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2279             "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
2280
2281         switch (ni->ni_mlstate) {
2282         case IEEE80211_NODE_MESH_IDLE:
2283                 /* Reject open request if reached our maximum neighbor count */
2284                 if (ms->ms_neighbors >= IEEE80211_MESH_MAX_NEIGHBORS) {
2285                         args[0] = meshpeer->peer_llinkid;
2286                         args[1] = 0;
2287                         args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2288                         ieee80211_send_action(ni,
2289                             IEEE80211_ACTION_CAT_SELF_PROT,
2290                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2291                             args);
2292                         /* stay in IDLE state */
2293                         return (0);
2294                 }
2295                 /* Open frame accepted */
2296                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2297                 ni->ni_mllid = meshpeer->peer_llinkid;
2298                 ni->ni_mlpid = mesh_generateid(vap);
2299                 if (ni->ni_mlpid == 0)
2300                         return 0;               /* XXX */
2301                 args[0] = ni->ni_mlpid;
2302                 /* Announce we're open too... */
2303                 ieee80211_send_action(ni,
2304                     IEEE80211_ACTION_CAT_SELF_PROT,
2305                     IEEE80211_ACTION_MESHPEERING_OPEN, args);
2306                 /* ...and confirm the link. */
2307                 args[0] = ni->ni_mlpid;
2308                 args[1] = ni->ni_mllid;
2309                 ieee80211_send_action(ni,
2310                     IEEE80211_ACTION_CAT_SELF_PROT,
2311                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2312                     args);
2313                 mesh_peer_timeout_setup(ni);
2314                 break;
2315         case IEEE80211_NODE_MESH_OPENRCV:
2316                 /* Wrong Link ID */
2317                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2318                         args[0] = ni->ni_mllid;
2319                         args[1] = ni->ni_mlpid;
2320                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2321                         ieee80211_send_action(ni,
2322                             IEEE80211_ACTION_CAT_SELF_PROT,
2323                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2324                             args);
2325                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2326                         mesh_peer_timeout_setup(ni);
2327                         break;
2328                 }
2329                 /* Duplicate open, confirm again. */
2330                 args[0] = ni->ni_mlpid;
2331                 args[1] = ni->ni_mllid;
2332                 ieee80211_send_action(ni,
2333                     IEEE80211_ACTION_CAT_SELF_PROT,
2334                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2335                     args);
2336                 break;
2337         case IEEE80211_NODE_MESH_OPENSNT:
2338                 ni->ni_mllid = meshpeer->peer_llinkid;
2339                 mesh_linkchange(ni, IEEE80211_NODE_MESH_OPENRCV);
2340                 args[0] = ni->ni_mlpid;
2341                 args[1] = ni->ni_mllid;
2342                 ieee80211_send_action(ni,
2343                     IEEE80211_ACTION_CAT_SELF_PROT,
2344                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2345                     args);
2346                 /* NB: don't setup/clear any timeout */
2347                 break;
2348         case IEEE80211_NODE_MESH_CONFIRMRCV:
2349                 if (ni->ni_mlpid != meshpeer->peer_linkid ||
2350                     ni->ni_mllid != meshpeer->peer_llinkid) {
2351                         args[0] = ni->ni_mlpid;
2352                         args[1] = ni->ni_mllid;
2353                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2354                         ieee80211_send_action(ni,
2355                             IEEE80211_ACTION_CAT_SELF_PROT,
2356                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2357                             args);
2358                         mesh_linkchange(ni,
2359                             IEEE80211_NODE_MESH_HOLDING);
2360                         mesh_peer_timeout_setup(ni);
2361                         break;
2362                 }
2363                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2364                 ni->ni_mllid = meshpeer->peer_llinkid;
2365                 args[0] = ni->ni_mlpid;
2366                 args[1] = ni->ni_mllid;
2367                 ieee80211_send_action(ni,
2368                     IEEE80211_ACTION_CAT_SELF_PROT,
2369                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2370                     args);
2371                 mesh_peer_timeout_stop(ni);
2372                 break;
2373         case IEEE80211_NODE_MESH_ESTABLISHED:
2374                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2375                         args[0] = ni->ni_mllid;
2376                         args[1] = ni->ni_mlpid;
2377                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2378                         ieee80211_send_action(ni,
2379                             IEEE80211_ACTION_CAT_SELF_PROT,
2380                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2381                             args);
2382                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2383                         mesh_peer_timeout_setup(ni);
2384                         break;
2385                 }
2386                 args[0] = ni->ni_mlpid;
2387                 args[1] = ni->ni_mllid;
2388                 ieee80211_send_action(ni,
2389                     IEEE80211_ACTION_CAT_SELF_PROT,
2390                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2391                     args);
2392                 break;
2393         case IEEE80211_NODE_MESH_HOLDING:
2394                 args[0] = ni->ni_mlpid;
2395                 args[1] = meshpeer->peer_llinkid;
2396                 /* Standard not clear about what the reaason code should be */
2397                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2398                 ieee80211_send_action(ni,
2399                     IEEE80211_ACTION_CAT_SELF_PROT,
2400                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2401                     args);
2402                 break;
2403         }
2404         return 0;
2405 }
2406
2407 static int
2408 mesh_recv_action_meshpeering_confirm(struct ieee80211_node *ni,
2409         const struct ieee80211_frame *wh,
2410         const uint8_t *frm, const uint8_t *efrm)
2411 {
2412         struct ieee80211vap *vap = ni->ni_vap;
2413         struct ieee80211_meshpeer_ie ie;
2414         const struct ieee80211_meshpeer_ie *meshpeer;
2415         uint16_t args[3];
2416
2417         /* +2+2+2+2 for action + code + capabilites + status code + AID */
2418         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2+2+2+2, efrm, &ie,
2419             IEEE80211_ACTION_MESHPEERING_CONFIRM);
2420         if (meshpeer == NULL) {
2421                 return 0;
2422         }
2423
2424         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2425             "recv PEER CONFIRM, local id 0x%x, peer id 0x%x",
2426             meshpeer->peer_llinkid, meshpeer->peer_linkid);
2427
2428         switch (ni->ni_mlstate) {
2429         case IEEE80211_NODE_MESH_OPENRCV:
2430                 mesh_linkchange(ni, IEEE80211_NODE_MESH_ESTABLISHED);
2431                 mesh_peer_timeout_stop(ni);
2432                 break;
2433         case IEEE80211_NODE_MESH_OPENSNT:
2434                 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2435                 mesh_peer_timeout_setup(ni);
2436                 break;
2437         case IEEE80211_NODE_MESH_HOLDING:
2438                 args[0] = ni->ni_mlpid;
2439                 args[1] = meshpeer->peer_llinkid;
2440                 /* Standard not clear about what the reaason code should be */
2441                 args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2442                 ieee80211_send_action(ni,
2443                     IEEE80211_ACTION_CAT_SELF_PROT,
2444                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2445                     args);
2446                 break;
2447         case IEEE80211_NODE_MESH_CONFIRMRCV:
2448                 if (ni->ni_mllid != meshpeer->peer_llinkid) {
2449                         args[0] = ni->ni_mlpid;
2450                         args[1] = ni->ni_mllid;
2451                         args[2] = IEEE80211_REASON_PEER_LINK_CANCELED;
2452                         ieee80211_send_action(ni,
2453                             IEEE80211_ACTION_CAT_SELF_PROT,
2454                             IEEE80211_ACTION_MESHPEERING_CLOSE,
2455                             args);
2456                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2457                         mesh_peer_timeout_setup(ni);
2458                 }
2459                 break;
2460         default:
2461                 IEEE80211_DISCARD(vap,
2462                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2463                     wh, NULL, "received confirm in invalid state %d",
2464                     ni->ni_mlstate);
2465                 vap->iv_stats.is_rx_mgtdiscard++;
2466                 break;
2467         }
2468         return 0;
2469 }
2470
2471 static int
2472 mesh_recv_action_meshpeering_close(struct ieee80211_node *ni,
2473         const struct ieee80211_frame *wh,
2474         const uint8_t *frm, const uint8_t *efrm)
2475 {
2476         struct ieee80211_meshpeer_ie ie;
2477         const struct ieee80211_meshpeer_ie *meshpeer;
2478         uint16_t args[3];
2479
2480         /* +2 for action + code */
2481         meshpeer = mesh_parse_meshpeering_action(ni, wh, frm+2, efrm, &ie,
2482             IEEE80211_ACTION_MESHPEERING_CLOSE);
2483         if (meshpeer == NULL) {
2484                 return 0;
2485         }
2486
2487         /*
2488          * XXX: check reason code, for example we could receive
2489          * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2490          * to peer again.
2491          */
2492
2493         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2494             ni, "%s", "recv PEER CLOSE");
2495
2496         switch (ni->ni_mlstate) {
2497         case IEEE80211_NODE_MESH_IDLE:
2498                 /* ignore */
2499                 break;
2500         case IEEE80211_NODE_MESH_OPENRCV:
2501         case IEEE80211_NODE_MESH_OPENSNT:
2502         case IEEE80211_NODE_MESH_CONFIRMRCV:
2503         case IEEE80211_NODE_MESH_ESTABLISHED:
2504                 args[0] = ni->ni_mlpid;
2505                 args[1] = ni->ni_mllid;
2506                 args[2] = IEEE80211_REASON_MESH_CLOSE_RCVD;
2507                 ieee80211_send_action(ni,
2508                     IEEE80211_ACTION_CAT_SELF_PROT,
2509                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2510                     args);
2511                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2512                 mesh_peer_timeout_setup(ni);
2513                 break;
2514         case IEEE80211_NODE_MESH_HOLDING:
2515                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2516                 mesh_peer_timeout_stop(ni);
2517                 break;
2518         }
2519         return 0;
2520 }
2521
2522 /*
2523  * Link Metric handling.
2524  */
2525 static int
2526 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2527         const struct ieee80211_frame *wh,
2528         const uint8_t *frm, const uint8_t *efrm)
2529 {
2530         const struct ieee80211_meshlmetric_ie *ie =
2531             (const struct ieee80211_meshlmetric_ie *)
2532             (frm+2); /* action + code */
2533         struct ieee80211_meshlmetric_ie lm_rep;
2534
2535         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2536                 lm_rep.lm_flags = 0;
2537                 lm_rep.lm_metric = mesh_airtime_calc(ni);
2538                 ieee80211_send_action(ni,
2539                     IEEE80211_ACTION_CAT_MESH,
2540                     IEEE80211_ACTION_MESH_LMETRIC,
2541                     &lm_rep);
2542         }
2543         /* XXX: else do nothing for now */
2544         return 0;
2545 }
2546
2547 /*
2548  * Parse meshgate action ie's for GANN frames.
2549  * Returns -1 if parsing fails, otherwise 0.
2550  */
2551 static int
2552 mesh_parse_meshgate_action(struct ieee80211_node *ni,
2553     const struct ieee80211_frame *wh,   /* XXX for VERIFY_LENGTH */
2554     struct ieee80211_meshgann_ie *ie, const uint8_t *frm, const uint8_t *efrm)
2555 {
2556         struct ieee80211vap *vap = ni->ni_vap;
2557         const struct ieee80211_meshgann_ie *gannie;
2558
2559         while (efrm - frm > 1) {
2560                 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
2561                 switch (*frm) {
2562                 case IEEE80211_ELEMID_MESHGANN:
2563                         gannie = (const struct ieee80211_meshgann_ie *) frm;
2564                         memset(ie, 0, sizeof(*ie));
2565                         ie->gann_ie = gannie->gann_ie;
2566                         ie->gann_len = gannie->gann_len;
2567                         ie->gann_flags = gannie->gann_flags;
2568                         ie->gann_hopcount = gannie->gann_hopcount;
2569                         ie->gann_ttl = gannie->gann_ttl;
2570                         IEEE80211_ADDR_COPY(ie->gann_addr, gannie->gann_addr);
2571                         ie->gann_seq = LE_READ_4(&gannie->gann_seq);
2572                         ie->gann_interval = LE_READ_2(&gannie->gann_interval);
2573                         break;
2574                 }
2575                 frm += frm[1] + 2;
2576         }
2577
2578         return 0;
2579 }
2580
2581 /*
2582  * Mesh Gate Announcement handling.
2583  */
2584 static int
2585 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2586         const struct ieee80211_frame *wh,
2587         const uint8_t *frm, const uint8_t *efrm)
2588 {
2589         struct ieee80211vap *vap = ni->ni_vap;
2590         struct ieee80211_mesh_state *ms = vap->iv_mesh;
2591         struct ieee80211_mesh_gate_route *gr, *next;
2592         struct ieee80211_mesh_route *rt_gate;
2593         struct ieee80211_meshgann_ie pgann;
2594         struct ieee80211_meshgann_ie ie;
2595         int found = 0;
2596
2597         /* +2 for action + code */
2598         if (mesh_parse_meshgate_action(ni, wh, &ie, frm+2, efrm) != 0) {
2599                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2600                     ni->ni_macaddr, NULL, "%s",
2601                     "GANN parsing failed");
2602                 vap->iv_stats.is_rx_mgtdiscard++;
2603                 return (0);
2604         }
2605
2606         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2607                 return 0;
2608
2609         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2610             "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2611             ie.gann_seq);
2612
2613         if (ms == NULL)
2614                 return (0);
2615         MESH_RT_LOCK(ms);
2616         TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2617                 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
2618                         continue;
2619                 if (ie.gann_seq <= gr->gr_lastseq) {
2620                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_MESH,
2621                             ni->ni_macaddr, NULL,
2622                             "GANN old seqno %u <= %u",
2623                             ie.gann_seq, gr->gr_lastseq);
2624                         MESH_RT_UNLOCK(ms);
2625                         return (0);
2626                 }
2627                 /* corresponding mesh gate found & GANN accepted */
2628                 found = 1;
2629                 break;
2630
2631         }
2632         if (found == 0) {
2633                 /* this GANN is from a new mesh Gate add it to known table. */
2634                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2635                     "stored new GANN information, seq %u.", ie.gann_seq);
2636                 gr = malloc(ALIGN(sizeof(struct ieee80211_mesh_gate_route)),
2637                     M_80211_MESH_GT_RT, M_NOWAIT | M_ZERO);
2638                 IEEE80211_ADDR_COPY(gr->gr_addr, ie.gann_addr);
2639                 TAILQ_INSERT_TAIL(&ms->ms_known_gates, gr, gr_next);
2640         }
2641         gr->gr_lastseq = ie.gann_seq;
2642
2643         /* check if we have a path to this gate */
2644         rt_gate = mesh_rt_find_locked(ms, gr->gr_addr);
2645         if (rt_gate != NULL &&
2646             rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) {
2647                 gr->gr_route = rt_gate;
2648                 rt_gate->rt_flags |= IEEE80211_MESHRT_FLAGS_GATE;
2649         }
2650
2651         MESH_RT_UNLOCK(ms);
2652
2653         /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2654         if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
2655                 return 0;
2656                 pgann.gann_flags = ie.gann_flags; /* Reserved */
2657         pgann.gann_hopcount = ie.gann_hopcount + 1;
2658         pgann.gann_ttl = ie.gann_ttl - 1;
2659         IEEE80211_ADDR_COPY(pgann.gann_addr, ie.gann_addr);
2660         pgann.gann_seq = ie.gann_seq;
2661         pgann.gann_interval = ie.gann_interval;
2662
2663         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2664             "%s", "propagate GANN");
2665
2666         ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2667             IEEE80211_ACTION_MESH_GANN, &pgann);
2668
2669         return 0;
2670 }
2671
2672 static int
2673 mesh_send_action(struct ieee80211_node *ni,
2674     const uint8_t sa[IEEE80211_ADDR_LEN],
2675     const uint8_t da[IEEE80211_ADDR_LEN],
2676     struct mbuf *m)
2677 {
2678         struct ieee80211vap *vap = ni->ni_vap;
2679         struct ieee80211com *ic = ni->ni_ic;
2680         struct ieee80211_bpf_params params;
2681         struct ieee80211_frame *wh;
2682         int ret;
2683
2684         KASSERT(ni != NULL, ("null node"));
2685
2686         if (vap->iv_state == IEEE80211_S_CAC) {
2687                 IEEE80211_NOTE(vap, IEEE80211_MSG_OUTPUT, ni,
2688                     "block %s frame in CAC state", "Mesh action");
2689                 vap->iv_stats.is_tx_badstate++;
2690                 ieee80211_free_node(ni);
2691                 m_freem(m);
2692                 return EIO;             /* XXX */
2693         }
2694
2695         M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT);
2696         if (m == NULL) {
2697                 ieee80211_free_node(ni);
2698                 return ENOMEM;
2699         }
2700
2701         IEEE80211_TX_LOCK(ic);
2702         wh = mtod(m, struct ieee80211_frame *);
2703         ieee80211_send_setup(ni, m,
2704              IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_ACTION,
2705              IEEE80211_NONQOS_TID, sa, da, sa);
2706         m->m_flags |= M_ENCAP;          /* mark encapsulated */
2707
2708         memset(&params, 0, sizeof(params));
2709         params.ibp_pri = WME_AC_VO;
2710         params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2711         if (IEEE80211_IS_MULTICAST(da))
2712                 params.ibp_try0 = 1;
2713         else
2714                 params.ibp_try0 = ni->ni_txparms->maxretry;
2715         params.ibp_power = ni->ni_txpower;
2716
2717         IEEE80211_NODE_STAT(ni, tx_mgmt);
2718
2719         ret = ieee80211_raw_output(vap, ni, m, &params);
2720         IEEE80211_TX_UNLOCK(ic);
2721         return (ret);
2722 }
2723
2724 #define ADDSHORT(frm, v) do {                   \
2725         frm[0] = (v) & 0xff;                    \
2726         frm[1] = (v) >> 8;                      \
2727         frm += 2;                               \
2728 } while (0)
2729 #define ADDWORD(frm, v) do {                    \
2730         frm[0] = (v) & 0xff;                    \
2731         frm[1] = ((v) >> 8) & 0xff;             \
2732         frm[2] = ((v) >> 16) & 0xff;            \
2733         frm[3] = ((v) >> 24) & 0xff;            \
2734         frm += 4;                               \
2735 } while (0)
2736
2737 static int
2738 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2739         int category, int action, void *args0)
2740 {
2741         struct ieee80211vap *vap = ni->ni_vap;
2742         struct ieee80211com *ic = ni->ni_ic;
2743         uint16_t *args = args0;
2744         const struct ieee80211_rateset *rs;
2745         struct mbuf *m;
2746         uint8_t *frm;
2747
2748         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2749             "send PEER OPEN action: localid 0x%x", args[0]);
2750
2751         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2752             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2753             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2754         ieee80211_ref_node(ni);
2755
2756         m = ieee80211_getmgtframe(&frm,
2757             ic->ic_headroom + sizeof(struct ieee80211_frame),
2758             sizeof(uint16_t)    /* action+category */
2759             + sizeof(uint16_t)  /* capabilites */
2760             + 2 + IEEE80211_RATE_SIZE
2761             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2762             + 2 + IEEE80211_MESHID_LEN
2763             + sizeof(struct ieee80211_meshconf_ie)
2764             + sizeof(struct ieee80211_meshpeer_ie)
2765         );
2766         if (m != NULL) {
2767                 /*
2768                  * mesh peer open action frame format:
2769                  *   [1] category
2770                  *   [1] action
2771                  *   [2] capabilities
2772                  *   [tlv] rates
2773                  *   [tlv] xrates
2774                  *   [tlv] mesh id
2775                  *   [tlv] mesh conf
2776                  *   [tlv] mesh peer link mgmt
2777                  */
2778                 *frm++ = category;
2779                 *frm++ = action;
2780                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2781                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2782                 frm = ieee80211_add_rates(frm, rs);
2783                 frm = ieee80211_add_xrates(frm, rs);
2784                 frm = ieee80211_add_meshid(frm, vap);
2785                 frm = ieee80211_add_meshconf(frm, vap);
2786                 frm = ieee80211_add_meshpeer(frm, IEEE80211_ACTION_MESHPEERING_OPEN,
2787                     args[0], 0, 0);
2788                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2789                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2790         } else {
2791                 vap->iv_stats.is_tx_nobuf++;
2792                 ieee80211_free_node(ni);
2793                 return ENOMEM;
2794         }
2795 }
2796
2797 static int
2798 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2799         int category, int action, void *args0)
2800 {
2801         struct ieee80211vap *vap = ni->ni_vap;
2802         struct ieee80211com *ic = ni->ni_ic;
2803         uint16_t *args = args0;
2804         const struct ieee80211_rateset *rs;
2805         struct mbuf *m;
2806         uint8_t *frm;
2807
2808         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2809             "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
2810             args[0], args[1]);
2811
2812         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2813             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2814             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2815         ieee80211_ref_node(ni);
2816
2817         m = ieee80211_getmgtframe(&frm,
2818             ic->ic_headroom + sizeof(struct ieee80211_frame),
2819             sizeof(uint16_t)    /* action+category */
2820             + sizeof(uint16_t)  /* capabilites */
2821             + sizeof(uint16_t)  /* status code */
2822             + sizeof(uint16_t)  /* AID */
2823             + 2 + IEEE80211_RATE_SIZE
2824             + 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE)
2825             + 2 + IEEE80211_MESHID_LEN
2826             + sizeof(struct ieee80211_meshconf_ie)
2827             + sizeof(struct ieee80211_meshpeer_ie)
2828         );
2829         if (m != NULL) {
2830                 /*
2831                  * mesh peer confirm action frame format:
2832                  *   [1] category
2833                  *   [1] action
2834                  *   [2] capabilities
2835                  *   [2] status code
2836                  *   [2] association id (peer ID)
2837                  *   [tlv] rates
2838                  *   [tlv] xrates
2839                  *   [tlv] mesh id
2840                  *   [tlv] mesh conf
2841                  *   [tlv] mesh peer link mgmt
2842                  */
2843                 *frm++ = category;
2844                 *frm++ = action;
2845                 ADDSHORT(frm, ieee80211_getcapinfo(vap, ni->ni_chan));
2846                 ADDSHORT(frm, 0);               /* status code */
2847                 ADDSHORT(frm, args[1]);         /* AID */
2848                 rs = ieee80211_get_suprates(ic, ic->ic_curchan);
2849                 frm = ieee80211_add_rates(frm, rs);
2850                 frm = ieee80211_add_xrates(frm, rs);
2851                 frm = ieee80211_add_meshid(frm, vap);
2852                 frm = ieee80211_add_meshconf(frm, vap);
2853                 frm = ieee80211_add_meshpeer(frm,
2854                     IEEE80211_ACTION_MESHPEERING_CONFIRM,
2855                     args[0], args[1], 0);
2856                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2857                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2858         } else {
2859                 vap->iv_stats.is_tx_nobuf++;
2860                 ieee80211_free_node(ni);
2861                 return ENOMEM;
2862         }
2863 }
2864
2865 static int
2866 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2867         int category, int action, void *args0)
2868 {
2869         struct ieee80211vap *vap = ni->ni_vap;
2870         struct ieee80211com *ic = ni->ni_ic;
2871         uint16_t *args = args0;
2872         struct mbuf *m;
2873         uint8_t *frm;
2874
2875         IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2876             "send PEER CLOSE action: localid 0x%x, peerid 0x%x reason %d",
2877             args[0], args[1], args[2]);
2878
2879         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2880             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2881             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2882         ieee80211_ref_node(ni);
2883
2884         m = ieee80211_getmgtframe(&frm,
2885             ic->ic_headroom + sizeof(struct ieee80211_frame),
2886             sizeof(uint16_t)    /* action+category */
2887             + sizeof(uint16_t)  /* reason code */
2888             + 2 + IEEE80211_MESHID_LEN
2889             + sizeof(struct ieee80211_meshpeer_ie)
2890         );
2891         if (m != NULL) {
2892                 /*
2893                  * mesh peer close action frame format:
2894                  *   [1] category
2895                  *   [1] action
2896                  *   [tlv] mesh id
2897                  *   [tlv] mesh peer link mgmt
2898                  */
2899                 *frm++ = category;
2900                 *frm++ = action;
2901                 frm = ieee80211_add_meshid(frm, vap);
2902                 frm = ieee80211_add_meshpeer(frm,
2903                     IEEE80211_ACTION_MESHPEERING_CLOSE,
2904                     args[0], args[1], args[2]);
2905                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2906                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2907         } else {
2908                 vap->iv_stats.is_tx_nobuf++;
2909                 ieee80211_free_node(ni);
2910                 return ENOMEM;
2911         }
2912 }
2913
2914 static int
2915 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2916         int category, int action, void *arg0)
2917 {
2918         struct ieee80211vap *vap = ni->ni_vap;
2919         struct ieee80211com *ic = ni->ni_ic;
2920         struct ieee80211_meshlmetric_ie *ie = arg0;
2921         struct mbuf *m;
2922         uint8_t *frm;
2923
2924         if (ie->lm_flags & IEEE80211_MESH_LMETRIC_FLAGS_REQ) {
2925                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2926                     ni, "%s", "send LINK METRIC REQUEST action");
2927         } else {
2928                 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2929                     ni, "send LINK METRIC REPLY action: metric 0x%x",
2930                     ie->lm_metric);
2931         }
2932         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2933             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2934             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2935         ieee80211_ref_node(ni);
2936
2937         m = ieee80211_getmgtframe(&frm,
2938             ic->ic_headroom + sizeof(struct ieee80211_frame),
2939             sizeof(uint16_t) +  /* action+category */
2940             sizeof(struct ieee80211_meshlmetric_ie)
2941         );
2942         if (m != NULL) {
2943                 /*
2944                  * mesh link metric
2945                  *   [1] category
2946                  *   [1] action
2947                  *   [tlv] mesh link metric
2948                  */
2949                 *frm++ = category;
2950                 *frm++ = action;
2951                 frm = ieee80211_add_meshlmetric(frm,
2952                     ie->lm_flags, ie->lm_metric);
2953                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2954                 return mesh_send_action(ni, vap->iv_myaddr, ni->ni_macaddr, m);
2955         } else {
2956                 vap->iv_stats.is_tx_nobuf++;
2957                 ieee80211_free_node(ni);
2958                 return ENOMEM;
2959         }
2960 }
2961
2962 static int
2963 mesh_send_action_meshgate(struct ieee80211_node *ni,
2964         int category, int action, void *arg0)
2965 {
2966         struct ieee80211vap *vap = ni->ni_vap;
2967         struct ieee80211com *ic = ni->ni_ic;
2968         struct ieee80211_meshgann_ie *ie = arg0;
2969         struct mbuf *m;
2970         uint8_t *frm;
2971
2972         IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2973             "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2974             ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2975         ieee80211_ref_node(ni);
2976
2977         m = ieee80211_getmgtframe(&frm,
2978             ic->ic_headroom + sizeof(struct ieee80211_frame),
2979             sizeof(uint16_t) +  /* action+category */
2980             IEEE80211_MESHGANN_BASE_SZ
2981         );
2982         if (m != NULL) {
2983                 /*
2984                  * mesh link metric
2985                  *   [1] category
2986                  *   [1] action
2987                  *   [tlv] mesh gate annoucement
2988                  */
2989                 *frm++ = category;
2990                 *frm++ = action;
2991                 frm = ieee80211_add_meshgate(frm, ie);
2992                 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2993                 return mesh_send_action(ni, vap->iv_myaddr, broadcastaddr, m);
2994         } else {
2995                 vap->iv_stats.is_tx_nobuf++;
2996                 ieee80211_free_node(ni);
2997                 return ENOMEM;
2998         }
2999 }
3000
3001 static void
3002 mesh_peer_timeout_setup(struct ieee80211_node *ni)
3003 {
3004         switch (ni->ni_mlstate) {
3005         case IEEE80211_NODE_MESH_HOLDING:
3006                 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
3007                 break;
3008         case IEEE80211_NODE_MESH_CONFIRMRCV:
3009                 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
3010                 break;
3011         case IEEE80211_NODE_MESH_IDLE:
3012                 ni->ni_mltval = 0;
3013                 break;
3014         default:
3015                 ni->ni_mltval = ieee80211_mesh_retrytimeout;
3016                 break;
3017         }
3018         if (ni->ni_mltval)
3019                 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
3020                     mesh_peer_timeout_cb, ni);
3021 }
3022
3023 /*
3024  * Same as above but backoffs timer statisically 50%.
3025  */
3026 static void
3027 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3028 {
3029         uint32_t r;
3030
3031         r = arc4random();
3032         ni->ni_mltval += r % ni->ni_mltval;
3033         callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3034             ni);
3035 }
3036
3037 static __inline void
3038 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3039 {
3040         callout_drain(&ni->ni_mltimer);
3041 }
3042
3043 static void
3044 mesh_peer_backoff_cb(void *arg)
3045 {
3046         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3047
3048         /* After backoff timeout, try to peer automatically again. */
3049         ni->ni_mlhcnt = 0;
3050 }
3051
3052 /*
3053  * Mesh Peer Link Management FSM timeout handling.
3054  */
3055 static void
3056 mesh_peer_timeout_cb(void *arg)
3057 {
3058         struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3059         uint16_t args[3];
3060
3061         IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_MESH,
3062             ni, "mesh link timeout, state %d, retry counter %d",
3063             ni->ni_mlstate, ni->ni_mlrcnt);
3064
3065         switch (ni->ni_mlstate) {
3066         case IEEE80211_NODE_MESH_IDLE:
3067         case IEEE80211_NODE_MESH_ESTABLISHED:
3068                 break;
3069         case IEEE80211_NODE_MESH_OPENSNT:
3070         case IEEE80211_NODE_MESH_OPENRCV:
3071                 if (ni->ni_mlrcnt == ieee80211_mesh_maxretries) {
3072                         args[0] = ni->ni_mlpid;
3073                         args[2] = IEEE80211_REASON_MESH_MAX_RETRIES;
3074                         ieee80211_send_action(ni,
3075                             IEEE80211_ACTION_CAT_SELF_PROT,
3076                             IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3077                         ni->ni_mlrcnt = 0;
3078                         mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3079                         mesh_peer_timeout_setup(ni);
3080                 } else {
3081                         args[0] = ni->ni_mlpid;
3082                         ieee80211_send_action(ni,
3083                             IEEE80211_ACTION_CAT_SELF_PROT,
3084                             IEEE80211_ACTION_MESHPEERING_OPEN, args);
3085                         ni->ni_mlrcnt++;
3086                         mesh_peer_timeout_backoff(ni);
3087                 }
3088                 break;
3089         case IEEE80211_NODE_MESH_CONFIRMRCV:
3090                 args[0] = ni->ni_mlpid;
3091                 args[2] = IEEE80211_REASON_MESH_CONFIRM_TIMEOUT;
3092                 ieee80211_send_action(ni,
3093                     IEEE80211_ACTION_CAT_SELF_PROT,
3094                     IEEE80211_ACTION_MESHPEERING_CLOSE, args);
3095                 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3096                 mesh_peer_timeout_setup(ni);
3097                 break;
3098         case IEEE80211_NODE_MESH_HOLDING:
3099                 ni->ni_mlhcnt++;
3100                 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
3101                         callout_reset(&ni->ni_mlhtimer,
3102                             ieee80211_mesh_backofftimeout,
3103                             mesh_peer_backoff_cb, ni);
3104                 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
3105                 break;
3106         }
3107 }
3108
3109 static int
3110 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3111 {
3112         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3113
3114         if (ie == NULL || ie[1] != ms->ms_idlen)
3115                 return 1;
3116         return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3117 }
3118
3119 /*
3120  * Check if we are using the same algorithms for this mesh.
3121  */
3122 static int
3123 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3124 {
3125         const struct ieee80211_meshconf_ie *meshconf =
3126             (const struct ieee80211_meshconf_ie *) ie;
3127         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3128
3129         if (meshconf == NULL)
3130                 return 1;
3131         if (meshconf->conf_pselid != ms->ms_ppath->mpp_ie) {
3132                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3133                     "unknown path selection algorithm: 0x%x\n",
3134                     meshconf->conf_pselid);
3135                 return 1;
3136         }
3137         if (meshconf->conf_pmetid != ms->ms_pmetric->mpm_ie) {
3138                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3139                     "unknown path metric algorithm: 0x%x\n",
3140                     meshconf->conf_pmetid);
3141                 return 1;
3142         }
3143         if (meshconf->conf_ccid != 0) {
3144                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3145                     "unknown congestion control algorithm: 0x%x\n",
3146                     meshconf->conf_ccid);
3147                 return 1;
3148         }
3149         if (meshconf->conf_syncid != IEEE80211_MESHCONF_SYNC_NEIGHOFF) {
3150                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3151                     "unknown sync algorithm: 0x%x\n",
3152                     meshconf->conf_syncid);
3153                 return 1;
3154         }
3155         if (meshconf->conf_authid != 0) {
3156                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3157                     "unknown auth auth algorithm: 0x%x\n",
3158                     meshconf->conf_pselid);
3159                 return 1;
3160         }
3161         /* Not accepting peers */
3162         if (!(meshconf->conf_cap & IEEE80211_MESHCONF_CAP_AP)) {
3163                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_MESH,
3164                     "not accepting peers: 0x%x\n", meshconf->conf_cap);
3165                 return 1;
3166         }
3167         return 0;
3168 }
3169
3170 static int
3171 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3172     const uint8_t *ie)
3173 {
3174         const struct ieee80211_meshpeer_ie *meshpeer =
3175             (const struct ieee80211_meshpeer_ie *) ie;
3176
3177         if (meshpeer == NULL ||
3178             meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3179             meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
3180                 return 1;
3181         if (meshpeer->peer_proto != IEEE80211_MPPID_MPM) {
3182                 IEEE80211_DPRINTF(vap,
3183                     IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
3184                     "Only MPM protocol is supported (proto: 0x%02X)",
3185                     meshpeer->peer_proto);
3186                 return 1;
3187         }
3188         switch (subtype) {
3189         case IEEE80211_ACTION_MESHPEERING_OPEN:
3190                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3191                         return 1;
3192                 break;
3193         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3194                 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3195                         return 1;
3196                 break;
3197         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3198                 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3199                         return 1;
3200                 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3201                     meshpeer->peer_linkid != 0)
3202                         return 1;
3203                 if (meshpeer->peer_rcode == 0)
3204                         return 1;
3205                 break;
3206         }
3207         return 0;
3208 }
3209
3210 /*
3211  * Add a Mesh ID IE to a frame.
3212  */
3213 uint8_t *
3214 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3215 {
3216         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3217
3218         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
3219
3220         *frm++ = IEEE80211_ELEMID_MESHID;
3221         *frm++ = ms->ms_idlen;
3222         memcpy(frm, ms->ms_id, ms->ms_idlen);
3223         return frm + ms->ms_idlen;
3224 }
3225
3226 /*
3227  * Add a Mesh Configuration IE to a frame.
3228  * For now just use HWMP routing, Airtime link metric, Null Congestion
3229  * Signaling, Null Sync Protocol and Null Authentication.
3230  */
3231 uint8_t *
3232 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3233 {
3234         const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3235         uint16_t caps;
3236
3237         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3238
3239         *frm++ = IEEE80211_ELEMID_MESHCONF;
3240         *frm++ = IEEE80211_MESH_CONF_SZ;
3241         *frm++ = ms->ms_ppath->mpp_ie;          /* path selection */
3242         *frm++ = ms->ms_pmetric->mpm_ie;        /* link metric */
3243         *frm++ = IEEE80211_MESHCONF_CC_DISABLED;
3244         *frm++ = IEEE80211_MESHCONF_SYNC_NEIGHOFF;
3245         *frm++ = IEEE80211_MESHCONF_AUTH_DISABLED;
3246         /* NB: set the number of neighbors before the rest */
3247         *frm = (ms->ms_neighbors > IEEE80211_MESH_MAX_NEIGHBORS ?
3248             IEEE80211_MESH_MAX_NEIGHBORS : ms->ms_neighbors) << 1;
3249         if (ms->ms_flags & IEEE80211_MESHFLAGS_GATE)
3250                 *frm |= IEEE80211_MESHCONF_FORM_GATE;
3251         frm += 1;
3252         caps = 0;
3253         if (ms->ms_flags & IEEE80211_MESHFLAGS_AP)
3254                 caps |= IEEE80211_MESHCONF_CAP_AP;
3255         if (ms->ms_flags & IEEE80211_MESHFLAGS_FWD)
3256                 caps |= IEEE80211_MESHCONF_CAP_FWRD;
3257         *frm++ = caps;
3258         return frm;
3259 }
3260
3261 /*
3262  * Add a Mesh Peer Management IE to a frame.
3263  */
3264 uint8_t *
3265 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3266     uint16_t peerid, uint16_t reason)
3267 {
3268
3269         KASSERT(localid != 0, ("localid == 0"));
3270
3271         *frm++ = IEEE80211_ELEMID_MESHPEER;
3272         switch (subtype) {
3273         case IEEE80211_ACTION_MESHPEERING_OPEN:
3274                 *frm++ = IEEE80211_MPM_BASE_SZ;         /* length */
3275                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3276                 ADDSHORT(frm, localid);                 /* local ID */
3277                 break;
3278         case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3279                 KASSERT(peerid != 0, ("sending peer confirm without peer id"));
3280                 *frm++ = IEEE80211_MPM_BASE_SZ + 2;     /* length */
3281                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3282                 ADDSHORT(frm, localid);                 /* local ID */
3283                 ADDSHORT(frm, peerid);                  /* peer ID */
3284                 break;
3285         case IEEE80211_ACTION_MESHPEERING_CLOSE:
3286                 if (peerid)
3287                         *frm++ = IEEE80211_MPM_MAX_SZ;  /* length */
3288                 else
3289                         *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3290                 ADDSHORT(frm, IEEE80211_MPPID_MPM);     /* proto */
3291                 ADDSHORT(frm, localid); /* local ID */
3292                 if (peerid)
3293                         ADDSHORT(frm, peerid);  /* peer ID */
3294                 ADDSHORT(frm, reason);
3295                 break;
3296         }
3297         return frm;
3298 }
3299
3300 /*
3301  * Compute an Airtime Link Metric for the link with this node.
3302  *
3303  * Based on Draft 3.0 spec (11B.10, p.149).
3304  */
3305 /*
3306  * Max 802.11s overhead.
3307  */
3308 #define IEEE80211_MESH_MAXOVERHEAD \
3309         (sizeof(struct ieee80211_qosframe_addr4) \
3310          + sizeof(struct ieee80211_meshcntl_ae10) \
3311         + sizeof(struct llc) \
3312         + IEEE80211_ADDR_LEN \
3313         + IEEE80211_WEP_IVLEN \
3314         + IEEE80211_WEP_KIDLEN \
3315         + IEEE80211_WEP_CRCLEN \
3316         + IEEE80211_WEP_MICLEN \
3317         + IEEE80211_CRC_LEN)
3318 uint32_t
3319 mesh_airtime_calc(struct ieee80211_node *ni)
3320 {
3321 #define M_BITS 8
3322 #define S_FACTOR (2 * M_BITS)
3323         struct ieee80211com *ic = ni->ni_ic;
3324         struct ifnet *ifp = ni->ni_vap->iv_ifp;
3325         const static int nbits = 8192 << M_BITS;
3326         uint32_t overhead, rate, errrate;
3327         uint64_t res;
3328
3329         /* Time to transmit a frame */
3330         rate = ni->ni_txrate;
3331         overhead = ieee80211_compute_duration(ic->ic_rt,
3332             ifp->if_mtu + IEEE80211_MESH_MAXOVERHEAD, rate, 0) << M_BITS;
3333         /* Error rate in percentage */
3334         /* XXX assuming small failures are ok */
3335         errrate = (((ifp->if_oerrors +
3336             ifp->if_ierrors) / 100) << M_BITS) / 100;
3337         res = (overhead + (nbits / rate)) *
3338             ((1 << S_FACTOR) / ((1 << M_BITS) - errrate));
3339
3340         return (uint32_t)(res >> S_FACTOR);
3341 #undef M_BITS
3342 #undef S_FACTOR
3343 }
3344
3345 /*
3346  * Add a Mesh Link Metric report IE to a frame.
3347  */
3348 uint8_t *
3349 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3350 {
3351         *frm++ = IEEE80211_ELEMID_MESHLINK;
3352         *frm++ = 5;
3353         *frm++ = flags;
3354         ADDWORD(frm, metric);
3355         return frm;
3356 }
3357
3358 /*
3359  * Add a Mesh Gate Announcement IE to a frame.
3360  */
3361 uint8_t *
3362 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
3363 {
3364         *frm++ = IEEE80211_ELEMID_MESHGANN; /* ie */
3365         *frm++ = IEEE80211_MESHGANN_BASE_SZ; /* len */
3366         *frm++ = ie->gann_flags;
3367         *frm++ = ie->gann_hopcount;
3368         *frm++ = ie->gann_ttl;
3369         IEEE80211_ADDR_COPY(frm, ie->gann_addr);
3370         frm += 6;
3371         ADDWORD(frm, ie->gann_seq);
3372         ADDSHORT(frm, ie->gann_interval);
3373         return frm;
3374 }
3375 #undef ADDSHORT
3376 #undef ADDWORD
3377
3378 /*
3379  * Initialize any mesh-specific node state.
3380  */
3381 void
3382 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3383 {
3384         ni->ni_flags |= IEEE80211_NODE_QOS;
3385         callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE);
3386         callout_init(&ni->ni_mlhtimer, CALLOUT_MPSAFE);
3387 }
3388
3389 /*
3390  * Cleanup any mesh-specific node state.
3391  */
3392 void
3393 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3394 {
3395         struct ieee80211vap *vap = ni->ni_vap;
3396         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3397
3398         callout_drain(&ni->ni_mltimer);
3399         callout_drain(&ni->ni_mlhtimer);
3400         /* NB: short-circuit callbacks after mesh_vdetach */
3401         if (vap->iv_mesh != NULL)
3402                 ms->ms_ppath->mpp_peerdown(ni);
3403 }
3404
3405 void
3406 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3407 {
3408         ni->ni_meshidlen = ie[1];
3409         memcpy(ni->ni_meshid, ie + 2, ie[1]);
3410 }
3411
3412 /*
3413  * Setup mesh-specific node state on neighbor discovery.
3414  */
3415 void
3416 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3417         const struct ieee80211_frame *wh,
3418         const struct ieee80211_scanparams *sp)
3419 {
3420         ieee80211_parse_meshid(ni, sp->meshid);
3421 }
3422
3423 void
3424 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3425         struct ieee80211_beacon_offsets *bo)
3426 {
3427         KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
3428
3429         if (isset(bo->bo_flags, IEEE80211_BEACON_MESHCONF)) {
3430                 (void)ieee80211_add_meshconf(bo->bo_meshconf, vap);
3431                 clrbit(bo->bo_flags, IEEE80211_BEACON_MESHCONF);
3432         }
3433 }
3434
3435 static int
3436 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3437 {
3438         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3439         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3440         struct ieee80211_mesh_route *rt;
3441         struct ieee80211req_mesh_route *imr;
3442         size_t len, off;
3443         uint8_t *p;
3444         int error;
3445
3446         if (vap->iv_opmode != IEEE80211_M_MBSS)
3447                 return ENOSYS;
3448
3449         error = 0;
3450         switch (ireq->i_type) {
3451         case IEEE80211_IOC_MESH_ID:
3452                 ireq->i_len = ms->ms_idlen;
3453                 memcpy(tmpmeshid, ms->ms_id, ireq->i_len);
3454                 error = copyout(tmpmeshid, ireq->i_data, ireq->i_len);
3455                 break;
3456         case IEEE80211_IOC_MESH_AP:
3457                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3458                 break;
3459         case IEEE80211_IOC_MESH_FWRD:
3460                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3461                 break;
3462         case IEEE80211_IOC_MESH_GATE:
3463                 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3464                 break;
3465         case IEEE80211_IOC_MESH_TTL:
3466                 ireq->i_val = ms->ms_ttl;
3467                 break;
3468         case IEEE80211_IOC_MESH_RTCMD:
3469                 switch (ireq->i_val) {
3470                 case IEEE80211_MESH_RTCMD_LIST:
3471                         len = 0;
3472                         MESH_RT_LOCK(ms);
3473                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3474                                 len += sizeof(*imr);
3475                         }
3476                         MESH_RT_UNLOCK(ms);
3477                         if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3478                                 ireq->i_len = len;
3479                                 return ENOMEM;
3480                         }
3481                         ireq->i_len = len;
3482                         /* XXX M_WAIT? */
3483                         p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO);
3484                         if (p == NULL)
3485                                 return ENOMEM;
3486                         off = 0;
3487                         MESH_RT_LOCK(ms);
3488                         TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3489                                 if (off >= len)
3490                                         break;
3491                                 imr = (struct ieee80211req_mesh_route *)
3492                                     (p + off);
3493                                 IEEE80211_ADDR_COPY(imr->imr_dest,
3494                                     rt->rt_dest);
3495                                 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3496                                     rt->rt_nexthop);
3497                                 imr->imr_metric = rt->rt_metric;
3498                                 imr->imr_nhops = rt->rt_nhops;
3499                                 imr->imr_lifetime =
3500                                     ieee80211_mesh_rt_update(rt, 0);
3501                                 imr->imr_lastmseq = rt->rt_lastmseq;
3502                                 imr->imr_flags = rt->rt_flags; /* last */
3503                                 off += sizeof(*imr);
3504                         }
3505                         MESH_RT_UNLOCK(ms);
3506                         error = copyout(p, (uint8_t *)ireq->i_data,
3507                             ireq->i_len);
3508                         free(p, M_TEMP);
3509                         break;
3510                 case IEEE80211_MESH_RTCMD_FLUSH:
3511                 case IEEE80211_MESH_RTCMD_ADD:
3512                 case IEEE80211_MESH_RTCMD_DELETE:
3513                         return EINVAL;
3514                 default:
3515                         return ENOSYS;
3516                 }
3517                 break;
3518         case IEEE80211_IOC_MESH_PR_METRIC:
3519                 len = strlen(ms->ms_pmetric->mpm_descr);
3520                 if (ireq->i_len < len)
3521                         return EINVAL;
3522                 ireq->i_len = len;
3523                 error = copyout(ms->ms_pmetric->mpm_descr,
3524                     (uint8_t *)ireq->i_data, len);
3525                 break;
3526         case IEEE80211_IOC_MESH_PR_PATH:
3527                 len = strlen(ms->ms_ppath->mpp_descr);
3528                 if (ireq->i_len < len)
3529                         return EINVAL;
3530                 ireq->i_len = len;
3531                 error = copyout(ms->ms_ppath->mpp_descr,
3532                     (uint8_t *)ireq->i_data, len);
3533                 break;
3534         default:
3535                 return ENOSYS;
3536         }
3537
3538         return error;
3539 }
3540 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3541
3542 static int
3543 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
3544 {
3545         struct ieee80211_mesh_state *ms = vap->iv_mesh;
3546         uint8_t tmpmeshid[IEEE80211_NWID_LEN];
3547         uint8_t tmpaddr[IEEE80211_ADDR_LEN];
3548         char tmpproto[IEEE80211_MESH_PROTO_DSZ];
3549         int error;
3550
3551         if (vap->iv_opmode != IEEE80211_M_MBSS)
3552                 return ENOSYS;
3553
3554         error = 0;
3555         switch (ireq->i_type) {
3556         case IEEE80211_IOC_MESH_ID:
3557                 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3558                         return EINVAL;
3559                 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
3560                 if (error != 0)
3561                         break;
3562                 memset(ms->ms_id, 0, IEEE80211_NWID_LEN);
3563                 ms->ms_idlen = ireq->i_len;
3564                 memcpy(ms->ms_id, tmpmeshid, ireq->i_len);
3565                 error = ENETRESET;
3566                 break;
3567         case IEEE80211_IOC_MESH_AP:
3568                 if (ireq->i_val)
3569                         ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3570                 else
3571                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3572                 error = ENETRESET;
3573                 break;
3574         case IEEE80211_IOC_MESH_FWRD:
3575                 if (ireq->i_val)
3576                         ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3577                 else
3578                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3579                 mesh_gatemode_setup(vap);
3580                 break;
3581         case IEEE80211_IOC_MESH_GATE:
3582                 if (ireq->i_val)
3583                         ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3584                 else
3585                         ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3586                 break;
3587         case IEEE80211_IOC_MESH_TTL:
3588                 ms->ms_ttl = (uint8_t) ireq->i_val;
3589                 break;
3590         case IEEE80211_IOC_MESH_RTCMD:
3591                 switch (ireq->i_val) {
3592                 case IEEE80211_MESH_RTCMD_LIST:
3593                         return EINVAL;
3594                 case IEEE80211_MESH_RTCMD_FLUSH:
3595                         ieee80211_mesh_rt_flush(vap);
3596                         break;
3597                 case IEEE80211_MESH_RTCMD_ADD:
3598                         if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ireq->i_data) ||
3599                             IEEE80211_ADDR_EQ(broadcastaddr, ireq->i_data))
3600                                 return EINVAL;
3601                         error = copyin(ireq->i_data, &tmpaddr,
3602                             IEEE80211_ADDR_LEN);
3603                         if (error == 0)
3604                                 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3605                         break;
3606                 case IEEE80211_MESH_RTCMD_DELETE:
3607                         ieee80211_mesh_rt_del(vap, ireq->i_data);
3608                         break;
3609                 default:
3610                         return ENOSYS;
3611                 }
3612                 break;
3613         case IEEE80211_IOC_MESH_PR_METRIC:
3614                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3615                 if (error == 0) {
3616                         error = mesh_select_proto_metric(vap, tmpproto);
3617                         if (error == 0)
3618                                 error = ENETRESET;
3619                 }
3620                 break;
3621         case IEEE80211_IOC_MESH_PR_PATH:
3622                 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3623                 if (error == 0) {
3624                         error = mesh_select_proto_path(vap, tmpproto);
3625                         if (error == 0)
3626                                 error = ENETRESET;
3627                 }
3628                 break;
3629         default:
3630                 return ENOSYS;
3631         }
3632         return error;
3633 }
3634 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);