2 * Copyright (c) 2009 The FreeBSD Foundation
5 * This software was developed by Rui Paulo under sponsorship from the
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
29 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
35 * IEEE 802.11s Mesh Point (MBSS) support.
37 * Based on March 2009, D3.0 802.11s draft spec.
42 #include <sys/param.h>
43 #include <sys/systm.h>
45 #include <sys/malloc.h>
46 #include <sys/kernel.h>
48 #include <sys/socket.h>
49 #include <sys/sockio.h>
50 #include <sys/endian.h>
51 #include <sys/errno.h>
53 #include <sys/sysctl.h>
57 #include <net/if_media.h>
58 #include <net/if_llc.h>
59 #include <net/ethernet.h>
61 #include <net80211/ieee80211_var.h>
62 #include <net80211/ieee80211_action.h>
63 #ifdef IEEE80211_SUPPORT_SUPERG
64 #include <net80211/ieee80211_superg.h>
66 #include <net80211/ieee80211_input.h>
67 #include <net80211/ieee80211_mesh.h>
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,
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 *);
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,
100 uint32_t mesh_airtime_calc(struct ieee80211_node *);
103 * Timeout values come from the specification and are in milliseconds.
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;
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");
139 static const uint8_t broadcastaddr[IEEE80211_ADDR_LEN] =
140 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
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;
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;
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,
160 static struct ieee80211_mesh_proto_path mesh_proto_paths[4];
161 static struct ieee80211_mesh_proto_metric mesh_proto_metrics[4];
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)
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)
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");
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)
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");
182 * Helper functions to manipulate the Mesh routing table.
185 static struct ieee80211_mesh_route *
186 mesh_rt_find_locked(struct ieee80211_mesh_state *ms,
187 const uint8_t dest[IEEE80211_ADDR_LEN])
189 struct ieee80211_mesh_route *rt;
191 MESH_RT_LOCK_ASSERT(ms);
193 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
194 if (IEEE80211_ADDR_EQ(dest, rt->rt_dest))
200 static struct ieee80211_mesh_route *
201 mesh_rt_add_locked(struct ieee80211vap *vap,
202 const uint8_t dest[IEEE80211_ADDR_LEN])
204 struct ieee80211_mesh_state *ms = vap->iv_mesh;
205 struct ieee80211_mesh_route *rt;
207 KASSERT(!IEEE80211_ADDR_EQ(broadcastaddr, dest),
208 ("%s: adding broadcast to the routing table", __func__));
210 MESH_RT_LOCK_ASSERT(ms);
212 rt = malloc(ALIGN(sizeof(struct ieee80211_mesh_route)) +
213 ms->ms_ppath->mpp_privlen, M_80211_MESH_RT, M_NOWAIT | M_ZERO);
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);
226 struct ieee80211_mesh_route *
227 ieee80211_mesh_rt_find(struct ieee80211vap *vap,
228 const uint8_t dest[IEEE80211_ADDR_LEN])
230 struct ieee80211_mesh_state *ms = vap->iv_mesh;
231 struct ieee80211_mesh_route *rt;
234 rt = mesh_rt_find_locked(ms, dest);
239 struct ieee80211_mesh_route *
240 ieee80211_mesh_rt_add(struct ieee80211vap *vap,
241 const uint8_t dest[IEEE80211_ADDR_LEN])
243 struct ieee80211_mesh_state *ms = vap->iv_mesh;
244 struct ieee80211_mesh_route *rt;
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__));
252 rt = mesh_rt_add_locked(vap, dest);
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
263 ieee80211_mesh_rt_update(struct ieee80211_mesh_route *rt, int new_lifetime)
266 uint32_t lifetime = 0;
268 KASSERT(rt != NULL, ("route is NULL"));
273 /* dont clobber a proxy entry gated by us */
274 if (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY && rt->rt_nhops == 0) {
276 return rt->rt_lifetime;
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;
286 rt->rt_flags &= ~IEEE80211_MESHRT_FLAGS_VALID;
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);
295 lifetime = rt->rt_lifetime;
302 * Add a proxy route (as needed) for the specified destination.
305 ieee80211_mesh_proxy_check(struct ieee80211vap *vap,
306 const uint8_t dest[IEEE80211_ADDR_LEN])
308 struct ieee80211_mesh_state *ms = vap->iv_mesh;
309 struct ieee80211_mesh_route *rt;
312 rt = mesh_rt_find_locked(ms, dest);
314 rt = mesh_rt_add_locked(vap, dest);
316 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, dest,
317 "%s", "unable to add proxy entry");
318 vap->iv_stats.is_mesh_rtaddfailed++;
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;
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;
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.
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));
351 mesh_rt_del(struct ieee80211_mesh_state *ms, struct ieee80211_mesh_route *rt)
353 TAILQ_REMOVE(&ms->ms_routes, rt, rt_next);
355 * Grab the lock before destroying it, to be sure no one else
356 * is holding the route.
359 callout_drain(&rt->rt_discovery);
360 mtx_destroy(&rt->rt_lock);
361 free(rt, M_80211_MESH_RT);
365 ieee80211_mesh_rt_del(struct ieee80211vap *vap,
366 const uint8_t dest[IEEE80211_ADDR_LEN])
368 struct ieee80211_mesh_state *ms = vap->iv_mesh;
369 struct ieee80211_mesh_route *rt, *next;
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);
378 ms->ms_ppath->mpp_senderror(vap, dest, rt,
379 IEEE80211_REASON_MESH_PERR_DEST_UNREACH);
390 ieee80211_mesh_rt_flush(struct ieee80211vap *vap)
392 struct ieee80211_mesh_state *ms = vap->iv_mesh;
393 struct ieee80211_mesh_route *rt, *next;
398 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next)
404 ieee80211_mesh_rt_flush_peer(struct ieee80211vap *vap,
405 const uint8_t peer[IEEE80211_ADDR_LEN])
407 struct ieee80211_mesh_state *ms = vap->iv_mesh;
408 struct ieee80211_mesh_route *rt, *next;
411 TAILQ_FOREACH_SAFE(rt, &ms->ms_routes, rt_next, next) {
412 if (IEEE80211_ADDR_EQ(rt->rt_nexthop, peer))
419 * Flush expired routing entries, i.e. those in invalid state for
423 mesh_rt_flush_invalid(struct ieee80211vap *vap)
425 struct ieee80211_mesh_state *ms = vap->iv_mesh;
426 struct ieee80211_mesh_route *rt, *next;
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)
435 ieee80211_mesh_rt_update(rt, 0);
436 if ((rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
442 #define N(a) (sizeof(a) / sizeof(a[0]))
444 ieee80211_mesh_register_proto_path(const struct ieee80211_mesh_proto_path *mpp)
446 int i, firstempty = -1;
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)
452 if (!mesh_proto_paths[i].mpp_active && firstempty == -1)
457 memcpy(&mesh_proto_paths[firstempty], mpp, sizeof(*mpp));
458 mesh_proto_paths[firstempty].mpp_active = 1;
463 ieee80211_mesh_register_proto_metric(const struct
464 ieee80211_mesh_proto_metric *mpm)
466 int i, firstempty = -1;
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)
472 if (!mesh_proto_metrics[i].mpm_active && firstempty == -1)
477 memcpy(&mesh_proto_metrics[firstempty], mpm, sizeof(*mpm));
478 mesh_proto_metrics[firstempty].mpm_active = 1;
483 mesh_select_proto_path(struct ieee80211vap *vap, const char *name)
485 struct ieee80211_mesh_state *ms = vap->iv_mesh;
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];
498 mesh_select_proto_metric(struct ieee80211vap *vap, const char *name)
500 struct ieee80211_mesh_state *ms = vap->iv_mesh;
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];
514 mesh_gatemode_setup(struct ieee80211vap *vap)
516 struct ieee80211_mesh_state *ms = vap->iv_mesh;
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
524 if (ms->ms_flags & IEEE80211_MESHFLAGS_ROOT ||
525 (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) == 0) {
526 callout_drain(&ms->ms_gatetimer);
529 callout_reset(&ms->ms_gatetimer, ieee80211_mesh_gateint,
530 mesh_gatemode_cb, vap);
534 mesh_gatemode_cb(void *arg)
536 struct ieee80211vap *vap = (struct ieee80211vap *)arg;
537 struct ieee80211_mesh_state *ms = vap->iv_mesh;
538 struct ieee80211_meshgann_ie gann;
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;
547 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH, vap->iv_bss,
548 "send broadcast GANN (seq %u)", gann.gann_seq);
550 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
551 IEEE80211_ACTION_MESH_GANN, &gann);
552 mesh_gatemode_setup(vap);
556 ieee80211_mesh_init(void)
559 memset(mesh_proto_paths, 0, sizeof(mesh_proto_paths));
560 memset(mesh_proto_metrics, 0, sizeof(mesh_proto_metrics));
563 * Setup mesh parameters that depends on the clock frequency.
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);
572 * Register action frame handlers.
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);
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);
605 * Register Airtime Link Metric.
607 ieee80211_mesh_register_proto_metric(&mesh_metric_airtime);
610 SYSINIT(wlan_mesh, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_mesh_init, NULL);
613 ieee80211_mesh_attach(struct ieee80211com *ic)
615 ic->ic_vattach[IEEE80211_M_MBSS] = mesh_vattach;
619 ieee80211_mesh_detach(struct ieee80211com *ic)
624 mesh_vdetach_peers(void *arg, struct ieee80211_node *ni)
626 struct ieee80211com *ic = ni->ni_ic;
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,
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));
645 mesh_vdetach(struct ieee80211vap *vap)
647 struct ieee80211_mesh_state *ms = vap->iv_mesh;
649 callout_drain(&ms->ms_cleantimer);
650 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_vdetach_peers,
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);
660 mesh_vattach(struct ieee80211vap *vap)
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,
671 printf("%s: couldn't alloc MBSS state\n", __func__);
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);
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);
692 * IEEE80211_M_MBSS vap state machine handler.
695 mesh_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
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;
702 IEEE80211_LOCK_ASSERT(ic);
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);
717 case IEEE80211_S_INIT:
719 case IEEE80211_S_SCAN:
720 ieee80211_cancel_scan(vap);
722 case IEEE80211_S_CAC:
723 ieee80211_dfs_cac_stop(vap);
725 case IEEE80211_S_RUN:
726 ieee80211_iterate_nodes(&ic->ic_sta,
727 mesh_vdetach_peers, NULL);
732 if (ostate != IEEE80211_S_INIT) {
733 /* NB: optimize INIT -> INIT case */
734 ieee80211_reset_bss(vap);
735 ieee80211_mesh_rt_flush(vap);
738 case IEEE80211_S_SCAN:
740 case IEEE80211_S_INIT:
741 if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
742 !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan) &&
745 * Already have a channel and a mesh ID; bypass
746 * the scan and startup immediately.
748 ieee80211_create_ibss(vap, vap->iv_des_chan);
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.
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;
767 ieee80211_check_scan_current(vap);
773 case IEEE80211_S_CAC:
775 * Start CAC on a DFS channel. We come here when starting
776 * a bss on a DFS channel (see ieee80211_create_ibss).
778 ieee80211_dfs_cac_start(vap);
780 case IEEE80211_S_RUN:
782 case IEEE80211_S_INIT:
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.
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 */
794 case IEEE80211_S_CAC:
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.
801 case IEEE80211_S_CSA:
804 * Shorten inactivity timer of associated stations
805 * to weed out sta's that don't follow a CSA.
807 ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
810 * Update bss node channel to reflect where
811 * we landed after CSA.
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 */
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;
824 "synchronized with %s meshid ",
825 ether_sprintf(ni->ni_meshid));
826 ieee80211_print_essid(ni->ni_meshid,
829 printf(" channel %d\n",
830 ieee80211_chan2ieee(ic, ic->ic_curchan));
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);
845 /* NB: ostate not nstate */
846 ms->ms_ppath->mpp_newstate(vap, ostate, arg);
851 mesh_rt_cleanup_cb(void *arg)
853 struct ieee80211vap *vap = arg;
854 struct ieee80211_mesh_state *ms = vap->iv_mesh;
856 mesh_rt_flush_invalid(vap);
857 callout_reset(&ms->ms_cleantimer, ms->ms_ppath->mpp_inact,
858 mesh_rt_cleanup_cb, vap);
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.
866 struct ieee80211_mesh_gate_route *
867 ieee80211_mesh_mark_gate(struct ieee80211vap *vap, const uint8_t *addr,
868 struct ieee80211_mesh_route *rt)
870 struct ieee80211_mesh_state *ms = vap->iv_mesh;
871 struct ieee80211_mesh_gate_route *gr = NULL, *next;
875 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
876 if (IEEE80211_ADDR_EQ(gr->gr_addr, addr)) {
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);
892 /* TODO: link from path route to gate route */
900 * Helper function to note the Mesh Peer Link FSM change.
903 mesh_linkchange(struct ieee80211_node *ni, enum ieee80211_mesh_mlstate state)
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"
917 IEEE80211_NOTE(vap, IEEE80211_MSG_MESH,
918 ni, "peer link: %s -> %s",
919 meshlinkstates[ni->ni_mlstate], meshlinkstates[state]);
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"));
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"));
931 ieee80211_beacon_notify(vap, IEEE80211_BEACON_MESHCONF);
933 ni->ni_mlstate = state;
935 case IEEE80211_NODE_MESH_HOLDING:
936 ms->ms_ppath->mpp_peerdown(ni);
938 case IEEE80211_NODE_MESH_ESTABLISHED:
939 ieee80211_mesh_discover(vap, ni->ni_macaddr, NULL);
947 * Helper function to generate a unique local ID required for mesh
948 * peer establishment.
951 mesh_checkid(void *arg, struct ieee80211_node *ni)
955 if (*r == ni->ni_mllid)
956 *(uint16_t *)arg = 0;
960 mesh_generateid(struct ieee80211vap *vap)
966 get_random_bytes(&r, 2);
967 ieee80211_iterate_nodes(&vap->iv_ic->ic_sta, mesh_checkid, &r);
969 } while (r == 0 && maxiter > 0);
974 * Verifies if we already received this packet by checking its
976 * Returns 0 if the frame is to be accepted, 1 otherwise.
979 mesh_checkpseq(struct ieee80211vap *vap,
980 const uint8_t source[IEEE80211_ADDR_LEN], uint32_t seq)
982 struct ieee80211_mesh_route *rt;
984 rt = ieee80211_mesh_rt_find(vap, source);
986 rt = ieee80211_mesh_rt_add(vap, source);
988 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
989 "%s", "add mcast route failed");
990 vap->iv_stats.is_mesh_rtaddfailed++;
993 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, source,
994 "add mcast route, mesh seqno %d", seq);
995 rt->rt_lastmseq = seq;
998 if (IEEE80211_MESH_SEQ_GEQ(rt->rt_lastmseq, seq)) {
1001 rt->rt_lastmseq = seq;
1007 * Iterate the routing table and locate the next hop.
1009 struct ieee80211_node *
1010 ieee80211_mesh_find_txnode(struct ieee80211vap *vap,
1011 const uint8_t dest[IEEE80211_ADDR_LEN])
1013 struct ieee80211_mesh_route *rt;
1015 rt = ieee80211_mesh_rt_find(vap, dest);
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);
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__,
1035 return ieee80211_find_txnode(vap, rt->rt_nexthop);
1039 mesh_transmit_to_gate(struct ieee80211vap *vap, struct mbuf *m,
1040 struct ieee80211_mesh_route *rt_gate)
1042 struct ifnet *ifp = vap->iv_ifp;
1043 struct ieee80211_node *ni;
1045 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1047 ni = ieee80211_mesh_find_txnode(vap, rt_gate->rt_dest);
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
1060 (void) ieee80211_vap_pkt_send_dest(vap, m, ni);
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.
1072 ieee80211_mesh_forward_to_gates(struct ieee80211vap *vap,
1073 struct ieee80211_mesh_route *rt_dest)
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;
1081 IEEE80211_TX_UNLOCK_ASSERT(ic);
1083 KASSERT( rt_dest->rt_flags == IEEE80211_MESHRT_FLAGS_DISCOVER,
1084 ("Route is not marked with IEEE80211_MESHRT_FLAGS_DISCOVER"));
1086 /* XXX: send to more than one valid mash gate */
1089 m = ieee80211_ageq_remove(&ic->ic_stageq,
1090 (struct ieee80211_node *)(uintptr_t)
1091 ieee80211_mac_hash(ic, rt_dest->rt_dest));
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,
1098 "mesh gate with no path %6D",
1102 if ((rt_gate->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) == 0)
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"));
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.
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);
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,
1130 "flush queued frame %p len %d", mcopy,
1131 mcopy->m_pkthdr.len);
1132 mesh_transmit_to_gate(vap, mcopy, rt_gate);
1136 rt_dest->rt_flags = 0; /* Mark invalid */
1142 * Forward the specified frame.
1143 * Decrement the TTL and set TA to our MAC address.
1146 mesh_forward(struct ieee80211vap *vap, struct mbuf *m,
1147 const struct ieee80211_meshcntl *mc)
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 *);
1155 struct ieee80211_meshcntl *mccopy;
1156 struct ieee80211_frame *whcopy;
1157 struct ieee80211_node *ni;
1160 /* This is called from the RX path - don't hold this lock */
1161 IEEE80211_TX_UNLOCK_ASSERT(ic);
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.
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++;
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++;
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++;
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++;
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;
1208 ni = ieee80211_mesh_find_txnode(vap, whcopy->i_addr3);
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.
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++;
1224 IEEE80211_ADDR_COPY(whcopy->i_addr1, ni->ni_macaddr);
1226 KASSERT(mccopy->mc_ttl > 0, ("%s called with wrong ttl", __func__));
1229 /* XXX calculate priority so drivers can find the tx queue */
1230 M_WME_SETAC(mcopy, WME_AC_BE);
1232 /* XXX do we know m_nextpkt is NULL? */
1233 mcopy->m_pkthdr.rcvif = (void *) ni;
1236 * XXX this bypasses all of the VAP TX handling; it passes frames
1237 * directly to the parent interface.
1239 * Because of this, there's no TX lock being held as there's no
1240 * encaps state being used.
1242 * Doing a direct parent transmit may not be the correct thing
1243 * to do here; we'll have to re-think this soon.
1245 IEEE80211_TX_LOCK(ic);
1246 err = ieee80211_parent_xmitpkt(ic, mcopy);
1247 IEEE80211_TX_UNLOCK(ic);
1249 /* NB: IFQ_HANDOFF reclaims mbuf */
1250 ieee80211_free_node(ni);
1256 static struct mbuf *
1257 mesh_decap(struct ieee80211vap *vap, struct mbuf *m, int hdrlen, int meshdrlen)
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;
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++;
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]));
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));
1293 m_adj(m, hdrlen - sizeof(*eh));
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);
1305 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1306 (const struct ieee80211_frame *)wh, NULL,
1308 vap->iv_stats.is_mesh_badae++;
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);
1320 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1321 (const struct ieee80211_frame *)wh, NULL,
1323 vap->iv_stats.is_mesh_badae++;
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));
1334 #endif /* !__NO_STRICT_ALIGNMENT */
1336 eh = mtod(m, struct ether_header *);
1337 eh->ether_type = htons(m->m_pkthdr.len - sizeof(*eh));
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.
1350 mesh_isucastforme(struct ieee80211vap *vap, const struct ieee80211_frame *wh,
1351 const struct ieee80211_meshcntl *mc)
1353 int ae = mc->mc_flags & 3;
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,
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);
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
1378 mesh_recv_indiv_data_to_fwrd(struct ieee80211vap *vap, struct mbuf *m,
1379 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1381 struct ieee80211_qosframe_addr4 *qwh;
1382 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1383 struct ieee80211_mesh_route *rt_meshda, *rt_meshsa;
1385 /* This is called from the RX path - don't hold this lock */
1386 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1388 qwh = (struct ieee80211_qosframe_addr4 *)wh;
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)
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, ":");
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. [ ]
1412 ieee80211_mesh_rt_update(rt_meshda, ticks_to_msecs(
1413 ms->ms_ppath->mpp_inact));
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));
1421 mesh_forward(vap, m, mc);
1422 return (1); /* dont process locally */
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.
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
1435 mesh_recv_indiv_data_to_me(struct ieee80211vap *vap, struct mbuf *m,
1436 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
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;
1444 /* This is called from the RX path - don't hold this lock */
1445 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1447 qwh = (struct ieee80211_qosframe_addr4 *)wh;
1448 mc10 = (const struct ieee80211_meshcntl_ae10 *)mc;
1452 * o verify addr2 is a legitimate transmitter
1453 * o lifetime of precursor entry is max(init, curr)
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));
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 */
1470 rt = ieee80211_mesh_rt_find(vap, mc10->mc_addr5);
1472 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_VALID) &&
1473 (rt->rt_flags & IEEE80211_MESHRT_FLAGS_PROXY) == 0) {
1475 * Forward on another mesh-path, according to
1476 * amendment as specified in 9.32.4.1
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 */
1484 * All other cases: forward of MSDUs from the MBSS to DS indiv.
1485 * addressed according to 13.11.3.2.
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, ":");
1491 return (0); /* process locally */
1495 * Try to forward the group addressed data on to other mesh STAs, and
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
1503 mesh_recv_group_data(struct ieee80211vap *vap, struct mbuf *m,
1504 struct ieee80211_frame *wh, const struct ieee80211_meshcntl *mc)
1506 #define MC01(mc) ((const struct ieee80211_meshcntl_ae01 *)mc)
1507 struct ieee80211_mesh_state *ms = vap->iv_mesh;
1509 /* This is called from the RX path - don't hold this lock */
1510 IEEE80211_TX_UNLOCK_ASSERT(vap->iv_ic);
1512 mesh_forward(vap, m, mc);
1514 if(mc->mc_ttl > 0) {
1515 if (mc->mc_flags & IEEE80211_MESH_AE_01) {
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.
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");
1529 return (0); /* process locally */
1534 mesh_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
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;
1547 const uint8_t *addr;
1549 ieee80211_seq rxseq;
1551 KASSERT(ni != NULL, ("null node"));
1552 ni->ni_inact = ni->ni_inact_reload;
1554 need_tap = 1; /* mbuf need to be tapped. */
1555 type = -1; /* undefined */
1557 /* This is called from the RX path - don't hold this lock */
1558 IEEE80211_TX_UNLOCK_ASSERT(ic);
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++;
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
1573 wh = mtod(m, struct ieee80211_frame *);
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++;
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);
1588 if (HAS_SEQ(type)) {
1589 uint8_t tid = ieee80211_gettid(wh);
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,
1607 vap->iv_stats.is_rx_dup++;
1608 IEEE80211_NODE_STAT(ni, rx_dup);
1611 ni->ni_rxseqs[tid] = rxseq;
1614 #ifdef IEEE80211_DEBUG
1616 * It's easier, but too expensive, to simulate different mesh
1617 * topologies by consulting the ACL policy very early, so do this
1620 * NB: this check is also done upon peering link initiation.
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++;
1630 case IEEE80211_FC0_TYPE_DATA:
1631 if (ni == vap->iv_bss)
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)",
1638 vap->iv_stats.is_mesh_nolink++;
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++;
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++;
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.
1663 hdrspace = ieee80211_hdrspace(ic, wh);
1664 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1665 m = ieee80211_defrag(ni, m, hdrspace);
1667 /* Fragment dropped or frame not complete yet */
1671 wh = mtod(m, struct ieee80211_frame *); /* NB: after defrag */
1674 * Now we have a complete Mesh Data frame.
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
1683 if (IEEE80211_IS_DSTODS(wh))
1684 *(uint16_t *)qos = *(uint16_t *)
1685 ((struct ieee80211_qosframe_addr4 *)wh)->i_qos;
1687 *(uint16_t *)qos = *(uint16_t *)
1688 ((struct ieee80211_qosframe *)wh)->i_qos;
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.
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 */
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++;
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.
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;
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++;
1737 /* XXX: are we sure there is no reallocating after m_pullup? */
1739 seq = LE_READ_4(mc->mc_seq);
1740 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1742 else if (ae == IEEE80211_MESH_AE_01)
1743 addr = MC01(mc)->mc_addr4;
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 */
1752 if (mesh_checkpseq(vap, addr, seq) != 0) {
1753 vap->iv_stats.is_rx_dup++;
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))
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);
1765 error = mesh_recv_indiv_data_to_fwrd(vap, m,
1768 error = mesh_recv_group_data(vap, m, wh, mc);
1774 if (ieee80211_radiotap_active_vap(vap))
1775 ieee80211_radiotap_rx(vap, m);
1779 * Finally, strip the 802.11 header.
1781 m = mesh_decap(vap, m, hdrspace, meshdrlen);
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)
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);
1794 if (qos[0] & IEEE80211_QOS_AMSDU) {
1795 m = ieee80211_decap_amsdu(ni, m);
1797 return IEEE80211_FC0_TYPE_DATA;
1799 ieee80211_deliver_data(vap, ni, m);
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++;
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",
1814 vap->iv_stats.is_rx_tooshort++;
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);
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 */
1833 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
1835 case IEEE80211_FC0_TYPE_CTL:
1836 vap->iv_stats.is_rx_ctl++;
1837 IEEE80211_NODE_STAT(ni, rx_ctrl);
1840 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1841 wh, "bad", "frame type 0x%x", type);
1842 /* should not come here */
1849 if (need_tap && ieee80211_radiotap_active_vap(vap))
1850 ieee80211_radiotap_rx(vap, m);
1860 mesh_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
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;
1870 wh = mtod(m0, struct ieee80211_frame *);
1871 frm = (uint8_t *)&wh[1];
1872 efrm = mtod(m0, uint8_t *) + m0->m_len;
1874 case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1875 case IEEE80211_FC0_SUBTYPE_BEACON:
1877 struct ieee80211_scanparams scan;
1879 * We process beacon/probe response
1880 * frames to discover neighbors.
1882 if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
1885 * Count frame now that we know it's to be processed.
1887 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1888 vap->iv_stats.is_rx_beacon++; /* XXX remove */
1889 IEEE80211_NODE_STAT(ni, rx_beacons);
1891 IEEE80211_NODE_STAT(ni, rx_proberesp);
1893 * If scanning, just pass information to the scan module.
1895 if (ic->ic_flags & IEEE80211_F_SCAN) {
1896 if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1898 * Actively scanning a channel marked passive;
1899 * send a probe request now that we know there
1900 * is 802.11 traffic present.
1902 * XXX check if the beacon we recv'd gives
1903 * us what we need and suppress the probe req
1905 ieee80211_probe_curchan(vap, 1);
1906 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1908 ieee80211_add_scan(vap, &scan, wh,
1913 /* The rest of this code assumes we are running */
1914 if (vap->iv_state != IEEE80211_S_RUN)
1917 * Ignore non-mesh STAs.
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++;
1928 * Ignore STAs for other mesh networks.
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++;
1938 * Peer only based on the current ACL policy.
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++;
1947 * Do neighbor discovery.
1949 if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
1951 * Create a new entry in the neighbor table.
1953 ni = ieee80211_add_neighbor(vap, wh, &scan);
1956 * Automatically peer with discovered nodes if possible.
1958 if (ni != vap->iv_bss &&
1959 (ms->ms_flags & IEEE80211_MESHFLAGS_AP)) {
1960 switch (ni->ni_mlstate) {
1961 case IEEE80211_NODE_MESH_IDLE:
1965 /* Wait for backoff callout to reset counter */
1966 if (ni->ni_mlhcnt >= ieee80211_mesh_maxholding)
1969 ni->ni_mlpid = mesh_generateid(vap);
1970 if (ni->ni_mlpid == 0)
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);
1978 mesh_peer_timeout_setup(ni);
1981 case IEEE80211_NODE_MESH_ESTABLISHED:
1984 * Valid beacon from a peer mesh STA
1987 rt = ieee80211_mesh_rt_find(vap, wh->i_addr2);
1989 ieee80211_mesh_rt_update(rt,
1991 ms->ms_ppath->mpp_inact));
2001 case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
2003 uint8_t *ssid, *meshid, *rates, *xrates;
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++;
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 */
2021 * prreq frame format
2023 * [tlv] supported rates
2024 * [tlv] extended supported rates
2027 ssid = meshid = rates = xrates = NULL;
2029 while (efrm - frm > 1) {
2030 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2032 case IEEE80211_ELEMID_SSID:
2035 case IEEE80211_ELEMID_RATES:
2038 case IEEE80211_ELEMID_XRATES:
2041 case IEEE80211_ELEMID_MESHID:
2047 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2048 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
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);
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");
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.
2068 ieee80211_send_proberesp(vap, wh->i_addr2, 0);
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++;
2089 if (ieee80211_parse_action(ni, m0) == 0)
2090 (void)ic->ic_recv_action(ni, wh, frm, efrm);
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++;
2108 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2109 wh, "mgt", "subtype 0x%x not handled", subtype);
2110 vap->iv_stats.is_rx_badsubtype++;
2116 mesh_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2120 case IEEE80211_FC0_SUBTYPE_BAR:
2121 ieee80211_recv_bar(ni, m);
2127 * Parse meshpeering action ie's for MPM frames
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)
2135 struct ieee80211vap *vap = ni->ni_vap;
2136 const struct ieee80211_meshpeer_ie *mpie;
2138 const uint8_t *meshid, *meshconf, *meshpeer;
2139 uint8_t sendclose = 0; /* 1 = MPM frame rejected, close will be sent */
2141 meshid = meshconf = meshpeer = NULL;
2142 while (efrm - frm > 1) {
2143 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return NULL);
2145 case IEEE80211_ELEMID_MESHID:
2148 case IEEE80211_ELEMID_MESHCONF:
2151 case IEEE80211_ELEMID_MESHPEER:
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);
2159 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2161 LE_READ_2(&mpie->peer_linkid);
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;
2169 LE_READ_2(&mpie->peer_linkid);
2172 LE_READ_2(&mpie->peer_linkid);
2174 LE_READ_2(&mpie->peer_rcode);
2184 * Verify the contents of the frame.
2185 * If it fails validation, close the peer link.
2187 if (mesh_verify_meshpeer(vap, subtype, (const uint8_t *)mp)) {
2189 IEEE80211_DISCARD(vap,
2190 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2191 wh, NULL, "%s", "MPM validation failed");
2194 /* If meshid is not the same reject any frames type. */
2195 if (sendclose == 0 && mesh_verify_meshid(vap, meshid)) {
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) {
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.
2212 * Close frames are accepted if meshid is the same.
2213 * Verify the other two types.
2215 if (sendclose == 0 && subtype != IEEE80211_ACTION_MESHPEERING_CLOSE &&
2216 mesh_verify_meshconf(vap, meshconf)) {
2218 IEEE80211_DISCARD(vap,
2219 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2220 wh, NULL, "%s", "configuration missmatch");
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:
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 */
2238 case IEEE80211_ACTION_MESHPEERING_OPEN:
2239 args[2] = IEEE80211_REASON_MESH_CPVIOLATION;
2241 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
2242 args[2] = IEEE80211_REASON_MESH_INCONS_PARAMS;
2245 ieee80211_send_action(ni,
2246 IEEE80211_ACTION_CAT_SELF_PROT,
2247 IEEE80211_ACTION_MESHPEERING_CLOSE,
2249 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2250 mesh_peer_timeout_setup(ni);
2256 return (const struct ieee80211_meshpeer_ie *) mp;
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)
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;
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) {
2278 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2279 "recv PEER OPEN, lid 0x%x", meshpeer->peer_llinkid);
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;
2287 args[2] = IEEE80211_REASON_MESH_MAX_PEERS;
2288 ieee80211_send_action(ni,
2289 IEEE80211_ACTION_CAT_SELF_PROT,
2290 IEEE80211_ACTION_MESHPEERING_CLOSE,
2292 /* stay in IDLE state */
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)
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,
2313 mesh_peer_timeout_setup(ni);
2315 case IEEE80211_NODE_MESH_OPENRCV:
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,
2325 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2326 mesh_peer_timeout_setup(ni);
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,
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,
2346 /* NB: don't setup/clear any timeout */
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,
2359 IEEE80211_NODE_MESH_HOLDING);
2360 mesh_peer_timeout_setup(ni);
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,
2371 mesh_peer_timeout_stop(ni);
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,
2382 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2383 mesh_peer_timeout_setup(ni);
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,
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,
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)
2412 struct ieee80211vap *vap = ni->ni_vap;
2413 struct ieee80211_meshpeer_ie ie;
2414 const struct ieee80211_meshpeer_ie *meshpeer;
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) {
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);
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);
2433 case IEEE80211_NODE_MESH_OPENSNT:
2434 mesh_linkchange(ni, IEEE80211_NODE_MESH_CONFIRMRCV);
2435 mesh_peer_timeout_setup(ni);
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,
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,
2456 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2457 mesh_peer_timeout_setup(ni);
2461 IEEE80211_DISCARD(vap,
2462 IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2463 wh, NULL, "received confirm in invalid state %d",
2465 vap->iv_stats.is_rx_mgtdiscard++;
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)
2476 struct ieee80211_meshpeer_ie ie;
2477 const struct ieee80211_meshpeer_ie *meshpeer;
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) {
2488 * XXX: check reason code, for example we could receive
2489 * IEEE80211_REASON_MESH_MAX_PEERS then we should not attempt
2493 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2494 ni, "%s", "recv PEER CLOSE");
2496 switch (ni->ni_mlstate) {
2497 case IEEE80211_NODE_MESH_IDLE:
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,
2511 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
2512 mesh_peer_timeout_setup(ni);
2514 case IEEE80211_NODE_MESH_HOLDING:
2515 mesh_linkchange(ni, IEEE80211_NODE_MESH_IDLE);
2516 mesh_peer_timeout_stop(ni);
2523 * Link Metric handling.
2526 mesh_recv_action_meshlmetric(struct ieee80211_node *ni,
2527 const struct ieee80211_frame *wh,
2528 const uint8_t *frm, const uint8_t *efrm)
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;
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,
2543 /* XXX: else do nothing for now */
2548 * Parse meshgate action ie's for GANN frames.
2549 * Returns -1 if parsing fails, otherwise 0.
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)
2556 struct ieee80211vap *vap = ni->ni_vap;
2557 const struct ieee80211_meshgann_ie *gannie;
2559 while (efrm - frm > 1) {
2560 IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return -1);
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);
2582 * Mesh Gate Announcement handling.
2585 mesh_recv_action_meshgate(struct ieee80211_node *ni,
2586 const struct ieee80211_frame *wh,
2587 const uint8_t *frm, const uint8_t *efrm)
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;
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++;
2606 if (IEEE80211_ADDR_EQ(vap->iv_myaddr, ie.gann_addr))
2609 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ni->ni_macaddr,
2610 "received GANN, meshgate: %6D (seq %u)", ie.gann_addr, ":",
2616 TAILQ_FOREACH_SAFE(gr, &ms->ms_known_gates, gr_next, next) {
2617 if (!IEEE80211_ADDR_EQ(gr->gr_addr, ie.gann_addr))
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);
2627 /* corresponding mesh gate found & GANN accepted */
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);
2641 gr->gr_lastseq = ie.gann_seq;
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;
2653 /* popagate only if decremented ttl >= 1 && forwarding is enabled */
2654 if ((ie.gann_ttl - 1) < 1 && !(ms->ms_flags & IEEE80211_MESHFLAGS_FWD))
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;
2663 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_MESH, ie.gann_addr,
2664 "%s", "propagate GANN");
2666 ieee80211_send_action(vap->iv_bss, IEEE80211_ACTION_CAT_MESH,
2667 IEEE80211_ACTION_MESH_GANN, &pgann);
2673 mesh_send_action(struct ieee80211_node *ni,
2674 const uint8_t sa[IEEE80211_ADDR_LEN],
2675 const uint8_t da[IEEE80211_ADDR_LEN],
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;
2684 KASSERT(ni != NULL, ("null node"));
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);
2692 return EIO; /* XXX */
2695 M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT);
2697 ieee80211_free_node(ni);
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 */
2708 memset(¶ms, 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;
2714 params.ibp_try0 = ni->ni_txparms->maxretry;
2715 params.ibp_power = ni->ni_txpower;
2717 IEEE80211_NODE_STAT(ni, tx_mgmt);
2719 ret = ieee80211_raw_output(vap, ni, m, ¶ms);
2720 IEEE80211_TX_UNLOCK(ic);
2724 #define ADDSHORT(frm, v) do { \
2725 frm[0] = (v) & 0xff; \
2726 frm[1] = (v) >> 8; \
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; \
2738 mesh_send_action_meshpeering_open(struct ieee80211_node *ni,
2739 int category, int action, void *args0)
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;
2748 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2749 "send PEER OPEN action: localid 0x%x", args[0]);
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);
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)
2768 * mesh peer open action frame format:
2776 * [tlv] mesh peer link mgmt
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,
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);
2791 vap->iv_stats.is_tx_nobuf++;
2792 ieee80211_free_node(ni);
2798 mesh_send_action_meshpeering_confirm(struct ieee80211_node *ni,
2799 int category, int action, void *args0)
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;
2808 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH, ni,
2809 "send PEER CONFIRM action: localid 0x%x, peerid 0x%x",
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);
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)
2831 * mesh peer confirm action frame format:
2836 * [2] association id (peer ID)
2841 * [tlv] mesh peer link mgmt
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);
2859 vap->iv_stats.is_tx_nobuf++;
2860 ieee80211_free_node(ni);
2866 mesh_send_action_meshpeering_close(struct ieee80211_node *ni,
2867 int category, int action, void *args0)
2869 struct ieee80211vap *vap = ni->ni_vap;
2870 struct ieee80211com *ic = ni->ni_ic;
2871 uint16_t *args = args0;
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]);
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);
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)
2893 * mesh peer close action frame format:
2897 * [tlv] mesh peer link mgmt
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);
2908 vap->iv_stats.is_tx_nobuf++;
2909 ieee80211_free_node(ni);
2915 mesh_send_action_meshlmetric(struct ieee80211_node *ni,
2916 int category, int action, void *arg0)
2918 struct ieee80211vap *vap = ni->ni_vap;
2919 struct ieee80211com *ic = ni->ni_ic;
2920 struct ieee80211_meshlmetric_ie *ie = arg0;
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");
2928 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_MESH,
2929 ni, "send LINK METRIC REPLY action: metric 0x%x",
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);
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)
2947 * [tlv] mesh link metric
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);
2956 vap->iv_stats.is_tx_nobuf++;
2957 ieee80211_free_node(ni);
2963 mesh_send_action_meshgate(struct ieee80211_node *ni,
2964 int category, int action, void *arg0)
2966 struct ieee80211vap *vap = ni->ni_vap;
2967 struct ieee80211com *ic = ni->ni_ic;
2968 struct ieee80211_meshgann_ie *ie = arg0;
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);
2977 m = ieee80211_getmgtframe(&frm,
2978 ic->ic_headroom + sizeof(struct ieee80211_frame),
2979 sizeof(uint16_t) + /* action+category */
2980 IEEE80211_MESHGANN_BASE_SZ
2987 * [tlv] mesh gate annoucement
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);
2995 vap->iv_stats.is_tx_nobuf++;
2996 ieee80211_free_node(ni);
3002 mesh_peer_timeout_setup(struct ieee80211_node *ni)
3004 switch (ni->ni_mlstate) {
3005 case IEEE80211_NODE_MESH_HOLDING:
3006 ni->ni_mltval = ieee80211_mesh_holdingtimeout;
3008 case IEEE80211_NODE_MESH_CONFIRMRCV:
3009 ni->ni_mltval = ieee80211_mesh_confirmtimeout;
3011 case IEEE80211_NODE_MESH_IDLE:
3015 ni->ni_mltval = ieee80211_mesh_retrytimeout;
3019 callout_reset(&ni->ni_mltimer, ni->ni_mltval,
3020 mesh_peer_timeout_cb, ni);
3024 * Same as above but backoffs timer statisically 50%.
3027 mesh_peer_timeout_backoff(struct ieee80211_node *ni)
3032 ni->ni_mltval += r % ni->ni_mltval;
3033 callout_reset(&ni->ni_mltimer, ni->ni_mltval, mesh_peer_timeout_cb,
3037 static __inline void
3038 mesh_peer_timeout_stop(struct ieee80211_node *ni)
3040 callout_drain(&ni->ni_mltimer);
3044 mesh_peer_backoff_cb(void *arg)
3046 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
3048 /* After backoff timeout, try to peer automatically again. */
3053 * Mesh Peer Link Management FSM timeout handling.
3056 mesh_peer_timeout_cb(void *arg)
3058 struct ieee80211_node *ni = (struct ieee80211_node *)arg;
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);
3065 switch (ni->ni_mlstate) {
3066 case IEEE80211_NODE_MESH_IDLE:
3067 case IEEE80211_NODE_MESH_ESTABLISHED:
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);
3078 mesh_linkchange(ni, IEEE80211_NODE_MESH_HOLDING);
3079 mesh_peer_timeout_setup(ni);
3081 args[0] = ni->ni_mlpid;
3082 ieee80211_send_action(ni,
3083 IEEE80211_ACTION_CAT_SELF_PROT,
3084 IEEE80211_ACTION_MESHPEERING_OPEN, args);
3086 mesh_peer_timeout_backoff(ni);
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);
3098 case IEEE80211_NODE_MESH_HOLDING:
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);
3110 mesh_verify_meshid(struct ieee80211vap *vap, const uint8_t *ie)
3112 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3114 if (ie == NULL || ie[1] != ms->ms_idlen)
3116 return memcmp(ms->ms_id, ie + 2, ms->ms_idlen);
3120 * Check if we are using the same algorithms for this mesh.
3123 mesh_verify_meshconf(struct ieee80211vap *vap, const uint8_t *ie)
3125 const struct ieee80211_meshconf_ie *meshconf =
3126 (const struct ieee80211_meshconf_ie *) ie;
3127 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3129 if (meshconf == NULL)
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);
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);
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);
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);
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);
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);
3171 mesh_verify_meshpeer(struct ieee80211vap *vap, uint8_t subtype,
3174 const struct ieee80211_meshpeer_ie *meshpeer =
3175 (const struct ieee80211_meshpeer_ie *) ie;
3177 if (meshpeer == NULL ||
3178 meshpeer->peer_len < IEEE80211_MPM_BASE_SZ ||
3179 meshpeer->peer_len > IEEE80211_MPM_MAX_SZ)
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);
3189 case IEEE80211_ACTION_MESHPEERING_OPEN:
3190 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ)
3193 case IEEE80211_ACTION_MESHPEERING_CONFIRM:
3194 if (meshpeer->peer_len != IEEE80211_MPM_BASE_SZ + 2)
3197 case IEEE80211_ACTION_MESHPEERING_CLOSE:
3198 if (meshpeer->peer_len < IEEE80211_MPM_BASE_SZ + 2)
3200 if (meshpeer->peer_len == (IEEE80211_MPM_BASE_SZ + 2) &&
3201 meshpeer->peer_linkid != 0)
3203 if (meshpeer->peer_rcode == 0)
3211 * Add a Mesh ID IE to a frame.
3214 ieee80211_add_meshid(uint8_t *frm, struct ieee80211vap *vap)
3216 struct ieee80211_mesh_state *ms = vap->iv_mesh;
3218 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a mbss vap"));
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;
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.
3232 ieee80211_add_meshconf(uint8_t *frm, struct ieee80211vap *vap)
3234 const struct ieee80211_mesh_state *ms = vap->iv_mesh;
3237 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
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;
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;
3262 * Add a Mesh Peer Management IE to a frame.
3265 ieee80211_add_meshpeer(uint8_t *frm, uint8_t subtype, uint16_t localid,
3266 uint16_t peerid, uint16_t reason)
3269 KASSERT(localid != 0, ("localid == 0"));
3271 *frm++ = IEEE80211_ELEMID_MESHPEER;
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 */
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 */
3285 case IEEE80211_ACTION_MESHPEERING_CLOSE:
3287 *frm++ = IEEE80211_MPM_MAX_SZ; /* length */
3289 *frm++ = IEEE80211_MPM_BASE_SZ + 2; /* length */
3290 ADDSHORT(frm, IEEE80211_MPPID_MPM); /* proto */
3291 ADDSHORT(frm, localid); /* local ID */
3293 ADDSHORT(frm, peerid); /* peer ID */
3294 ADDSHORT(frm, reason);
3301 * Compute an Airtime Link Metric for the link with this node.
3303 * Based on Draft 3.0 spec (11B.10, p.149).
3306 * Max 802.11s overhead.
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)
3319 mesh_airtime_calc(struct ieee80211_node *ni)
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;
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));
3340 return (uint32_t)(res >> S_FACTOR);
3346 * Add a Mesh Link Metric report IE to a frame.
3349 ieee80211_add_meshlmetric(uint8_t *frm, uint8_t flags, uint32_t metric)
3351 *frm++ = IEEE80211_ELEMID_MESHLINK;
3354 ADDWORD(frm, metric);
3359 * Add a Mesh Gate Announcement IE to a frame.
3362 ieee80211_add_meshgate(uint8_t *frm, struct ieee80211_meshgann_ie *ie)
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);
3371 ADDWORD(frm, ie->gann_seq);
3372 ADDSHORT(frm, ie->gann_interval);
3379 * Initialize any mesh-specific node state.
3382 ieee80211_mesh_node_init(struct ieee80211vap *vap, struct ieee80211_node *ni)
3384 ni->ni_flags |= IEEE80211_NODE_QOS;
3385 callout_init(&ni->ni_mltimer, CALLOUT_MPSAFE);
3386 callout_init(&ni->ni_mlhtimer, CALLOUT_MPSAFE);
3390 * Cleanup any mesh-specific node state.
3393 ieee80211_mesh_node_cleanup(struct ieee80211_node *ni)
3395 struct ieee80211vap *vap = ni->ni_vap;
3396 struct ieee80211_mesh_state *ms = vap->iv_mesh;
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);
3406 ieee80211_parse_meshid(struct ieee80211_node *ni, const uint8_t *ie)
3408 ni->ni_meshidlen = ie[1];
3409 memcpy(ni->ni_meshid, ie + 2, ie[1]);
3413 * Setup mesh-specific node state on neighbor discovery.
3416 ieee80211_mesh_init_neighbor(struct ieee80211_node *ni,
3417 const struct ieee80211_frame *wh,
3418 const struct ieee80211_scanparams *sp)
3420 ieee80211_parse_meshid(ni, sp->meshid);
3424 ieee80211_mesh_update_beacon(struct ieee80211vap *vap,
3425 struct ieee80211_beacon_offsets *bo)
3427 KASSERT(vap->iv_opmode == IEEE80211_M_MBSS, ("not a MBSS vap"));
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);
3436 mesh_ioctl_get80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
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;
3446 if (vap->iv_opmode != IEEE80211_M_MBSS)
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);
3456 case IEEE80211_IOC_MESH_AP:
3457 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_AP) != 0;
3459 case IEEE80211_IOC_MESH_FWRD:
3460 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_FWD) != 0;
3462 case IEEE80211_IOC_MESH_GATE:
3463 ireq->i_val = (ms->ms_flags & IEEE80211_MESHFLAGS_GATE) != 0;
3465 case IEEE80211_IOC_MESH_TTL:
3466 ireq->i_val = ms->ms_ttl;
3468 case IEEE80211_IOC_MESH_RTCMD:
3469 switch (ireq->i_val) {
3470 case IEEE80211_MESH_RTCMD_LIST:
3473 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3474 len += sizeof(*imr);
3477 if (len > ireq->i_len || ireq->i_len < sizeof(*imr)) {
3483 p = malloc(len, M_TEMP, M_NOWAIT | M_ZERO);
3488 TAILQ_FOREACH(rt, &ms->ms_routes, rt_next) {
3491 imr = (struct ieee80211req_mesh_route *)
3493 IEEE80211_ADDR_COPY(imr->imr_dest,
3495 IEEE80211_ADDR_COPY(imr->imr_nexthop,
3497 imr->imr_metric = rt->rt_metric;
3498 imr->imr_nhops = rt->rt_nhops;
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);
3506 error = copyout(p, (uint8_t *)ireq->i_data,
3510 case IEEE80211_MESH_RTCMD_FLUSH:
3511 case IEEE80211_MESH_RTCMD_ADD:
3512 case IEEE80211_MESH_RTCMD_DELETE:
3518 case IEEE80211_IOC_MESH_PR_METRIC:
3519 len = strlen(ms->ms_pmetric->mpm_descr);
3520 if (ireq->i_len < len)
3523 error = copyout(ms->ms_pmetric->mpm_descr,
3524 (uint8_t *)ireq->i_data, len);
3526 case IEEE80211_IOC_MESH_PR_PATH:
3527 len = strlen(ms->ms_ppath->mpp_descr);
3528 if (ireq->i_len < len)
3531 error = copyout(ms->ms_ppath->mpp_descr,
3532 (uint8_t *)ireq->i_data, len);
3540 IEEE80211_IOCTL_GET(mesh, mesh_ioctl_get80211);
3543 mesh_ioctl_set80211(struct ieee80211vap *vap, struct ieee80211req *ireq)
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];
3551 if (vap->iv_opmode != IEEE80211_M_MBSS)
3555 switch (ireq->i_type) {
3556 case IEEE80211_IOC_MESH_ID:
3557 if (ireq->i_val != 0 || ireq->i_len > IEEE80211_MESHID_LEN)
3559 error = copyin(ireq->i_data, tmpmeshid, ireq->i_len);
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);
3567 case IEEE80211_IOC_MESH_AP:
3569 ms->ms_flags |= IEEE80211_MESHFLAGS_AP;
3571 ms->ms_flags &= ~IEEE80211_MESHFLAGS_AP;
3574 case IEEE80211_IOC_MESH_FWRD:
3576 ms->ms_flags |= IEEE80211_MESHFLAGS_FWD;
3578 ms->ms_flags &= ~IEEE80211_MESHFLAGS_FWD;
3579 mesh_gatemode_setup(vap);
3581 case IEEE80211_IOC_MESH_GATE:
3583 ms->ms_flags |= IEEE80211_MESHFLAGS_GATE;
3585 ms->ms_flags &= ~IEEE80211_MESHFLAGS_GATE;
3587 case IEEE80211_IOC_MESH_TTL:
3588 ms->ms_ttl = (uint8_t) ireq->i_val;
3590 case IEEE80211_IOC_MESH_RTCMD:
3591 switch (ireq->i_val) {
3592 case IEEE80211_MESH_RTCMD_LIST:
3594 case IEEE80211_MESH_RTCMD_FLUSH:
3595 ieee80211_mesh_rt_flush(vap);
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))
3601 error = copyin(ireq->i_data, &tmpaddr,
3602 IEEE80211_ADDR_LEN);
3604 ieee80211_mesh_discover(vap, tmpaddr, NULL);
3606 case IEEE80211_MESH_RTCMD_DELETE:
3607 ieee80211_mesh_rt_del(vap, ireq->i_data);
3613 case IEEE80211_IOC_MESH_PR_METRIC:
3614 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3616 error = mesh_select_proto_metric(vap, tmpproto);
3621 case IEEE80211_IOC_MESH_PR_PATH:
3622 error = copyin(ireq->i_data, tmpproto, sizeof(tmpproto));
3624 error = mesh_select_proto_path(vap, tmpproto);
3634 IEEE80211_IOCTL_SET(mesh, mesh_ioctl_set80211);