8857d6b6f7
It turns out that these will clash very annoyingly with the linux macros in the linuxkpi layer, so let the wookie^Wlinux win. The only user that I can find is ath(4), so fix it there too.
1872 lines
55 KiB
C
1872 lines
55 KiB
C
/*-
|
|
* Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifdef __FreeBSD__
|
|
__FBSDID("$FreeBSD$");
|
|
#endif
|
|
|
|
/*
|
|
* IEEE 802.11 Station mode support.
|
|
*/
|
|
#include "opt_inet.h"
|
|
#include "opt_wlan.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/kernel.h>
|
|
|
|
#include <sys/socket.h>
|
|
#include <sys/sockio.h>
|
|
#include <sys/endian.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/if_media.h>
|
|
#include <net/if_llc.h>
|
|
#include <net/if_dl.h>
|
|
#include <net/if_var.h>
|
|
#include <net/ethernet.h>
|
|
|
|
#include <net/bpf.h>
|
|
|
|
#include <net80211/ieee80211_var.h>
|
|
#include <net80211/ieee80211_sta.h>
|
|
#include <net80211/ieee80211_input.h>
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
#include <net80211/ieee80211_superg.h>
|
|
#endif
|
|
#include <net80211/ieee80211_ratectl.h>
|
|
#include <net80211/ieee80211_sta.h>
|
|
|
|
#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2)
|
|
|
|
static void sta_vattach(struct ieee80211vap *);
|
|
static void sta_beacon_miss(struct ieee80211vap *);
|
|
static int sta_newstate(struct ieee80211vap *, enum ieee80211_state, int);
|
|
static int sta_input(struct ieee80211_node *, struct mbuf *,
|
|
const struct ieee80211_rx_stats *, int, int);
|
|
static void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *,
|
|
int subtype, const struct ieee80211_rx_stats *, int rssi, int nf);
|
|
static void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype);
|
|
|
|
void
|
|
ieee80211_sta_attach(struct ieee80211com *ic)
|
|
{
|
|
ic->ic_vattach[IEEE80211_M_STA] = sta_vattach;
|
|
}
|
|
|
|
void
|
|
ieee80211_sta_detach(struct ieee80211com *ic)
|
|
{
|
|
}
|
|
|
|
static void
|
|
sta_vdetach(struct ieee80211vap *vap)
|
|
{
|
|
}
|
|
|
|
static void
|
|
sta_vattach(struct ieee80211vap *vap)
|
|
{
|
|
vap->iv_newstate = sta_newstate;
|
|
vap->iv_input = sta_input;
|
|
vap->iv_recv_mgmt = sta_recv_mgmt;
|
|
vap->iv_recv_ctl = sta_recv_ctl;
|
|
vap->iv_opdetach = sta_vdetach;
|
|
vap->iv_bmiss = sta_beacon_miss;
|
|
}
|
|
|
|
/*
|
|
* Handle a beacon miss event. The common code filters out
|
|
* spurious events that can happen when scanning and/or before
|
|
* reaching RUN state.
|
|
*/
|
|
static void
|
|
sta_beacon_miss(struct ieee80211vap *vap)
|
|
{
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
|
|
IEEE80211_LOCK_ASSERT(ic);
|
|
|
|
KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning"));
|
|
KASSERT(vap->iv_state >= IEEE80211_S_RUN,
|
|
("wrong state %s", ieee80211_state_name[vap->iv_state]));
|
|
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
|
|
"beacon miss, mode %s state %s\n",
|
|
ieee80211_opmode_name[vap->iv_opmode],
|
|
ieee80211_state_name[vap->iv_state]);
|
|
|
|
if (vap->iv_state == IEEE80211_S_CSA) {
|
|
/*
|
|
* A Channel Switch is pending; assume we missed the
|
|
* beacon that would've completed the process and just
|
|
* force the switch. If we made a mistake we'll not
|
|
* find the AP on the new channel and fall back to a
|
|
* normal scan.
|
|
*/
|
|
ieee80211_csa_completeswitch(ic);
|
|
return;
|
|
}
|
|
if (++vap->iv_bmiss_count < vap->iv_bmiss_max) {
|
|
/*
|
|
* Send a directed probe req before falling back to a
|
|
* scan; if we receive a response ic_bmiss_count will
|
|
* be reset. Some cards mistakenly report beacon miss
|
|
* so this avoids the expensive scan if the ap is
|
|
* still there.
|
|
*/
|
|
ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr,
|
|
vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid,
|
|
vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen);
|
|
return;
|
|
}
|
|
|
|
callout_stop(&vap->iv_swbmiss);
|
|
vap->iv_bmiss_count = 0;
|
|
vap->iv_stats.is_beacon_miss++;
|
|
if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) {
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
|
|
/*
|
|
* If we receive a beacon miss interrupt when using
|
|
* dynamic turbo, attempt to switch modes before
|
|
* reassociating.
|
|
*/
|
|
if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP))
|
|
ieee80211_dturbo_switch(vap,
|
|
ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO);
|
|
#endif
|
|
/*
|
|
* Try to reassociate before scanning for a new ap.
|
|
*/
|
|
ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
|
|
} else {
|
|
/*
|
|
* Somebody else is controlling state changes (e.g.
|
|
* a user-mode app) don't do anything that would
|
|
* confuse them; just drop into scan mode so they'll
|
|
* notified of the state change and given control.
|
|
*/
|
|
ieee80211_new_state(vap, IEEE80211_S_SCAN, 0);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handle deauth with reason. We retry only for
|
|
* the cases where we might succeed. Otherwise
|
|
* we downgrade the ap and scan.
|
|
*/
|
|
static void
|
|
sta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason)
|
|
{
|
|
switch (reason) {
|
|
case IEEE80211_STATUS_SUCCESS: /* NB: MLME assoc */
|
|
case IEEE80211_STATUS_TIMEOUT:
|
|
case IEEE80211_REASON_ASSOC_EXPIRE:
|
|
case IEEE80211_REASON_NOT_AUTHED:
|
|
case IEEE80211_REASON_NOT_ASSOCED:
|
|
case IEEE80211_REASON_ASSOC_LEAVE:
|
|
case IEEE80211_REASON_ASSOC_NOT_AUTHED:
|
|
IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1);
|
|
break;
|
|
default:
|
|
ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason);
|
|
if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
|
|
ieee80211_check_scan_current(vap);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
sta_swbmiss_start(struct ieee80211vap *vap)
|
|
{
|
|
|
|
if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) {
|
|
/*
|
|
* Start s/w beacon miss timer for devices w/o
|
|
* hardware support. We fudge a bit here since
|
|
* we're doing this in software.
|
|
*/
|
|
vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS(
|
|
2 * vap->iv_bmissthreshold * vap->iv_bss->ni_intval);
|
|
vap->iv_swbmiss_count = 0;
|
|
callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period,
|
|
ieee80211_swbmiss, vap);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* IEEE80211_M_STA vap state machine handler.
|
|
* This routine handles the main states in the 802.11 protocol.
|
|
*/
|
|
static int
|
|
sta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
|
|
{
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
struct ieee80211_node *ni;
|
|
enum ieee80211_state ostate;
|
|
|
|
IEEE80211_LOCK_ASSERT(ic);
|
|
|
|
ostate = vap->iv_state;
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
|
|
__func__, ieee80211_state_name[ostate],
|
|
ieee80211_state_name[nstate], arg);
|
|
vap->iv_state = nstate; /* state transition */
|
|
callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */
|
|
if (ostate != IEEE80211_S_SCAN)
|
|
ieee80211_cancel_scan(vap); /* background scan */
|
|
ni = vap->iv_bss; /* NB: no reference held */
|
|
if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)
|
|
callout_stop(&vap->iv_swbmiss);
|
|
switch (nstate) {
|
|
case IEEE80211_S_INIT:
|
|
switch (ostate) {
|
|
case IEEE80211_S_SLEEP:
|
|
/* XXX wakeup */
|
|
/* XXX driver hook to wakeup the hardware? */
|
|
case IEEE80211_S_RUN:
|
|
IEEE80211_SEND_MGMT(ni,
|
|
IEEE80211_FC0_SUBTYPE_DISASSOC,
|
|
IEEE80211_REASON_ASSOC_LEAVE);
|
|
ieee80211_sta_leave(ni);
|
|
break;
|
|
case IEEE80211_S_ASSOC:
|
|
IEEE80211_SEND_MGMT(ni,
|
|
IEEE80211_FC0_SUBTYPE_DEAUTH,
|
|
IEEE80211_REASON_AUTH_LEAVE);
|
|
break;
|
|
case IEEE80211_S_SCAN:
|
|
ieee80211_cancel_scan(vap);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (ostate != IEEE80211_S_INIT) {
|
|
/* NB: optimize INIT -> INIT case */
|
|
ieee80211_reset_bss(vap);
|
|
}
|
|
if (vap->iv_auth->ia_detach != NULL)
|
|
vap->iv_auth->ia_detach(vap);
|
|
break;
|
|
case IEEE80211_S_SCAN:
|
|
switch (ostate) {
|
|
case IEEE80211_S_INIT:
|
|
/*
|
|
* Initiate a scan. We can come here as a result
|
|
* of an IEEE80211_IOC_SCAN_REQ too in which case
|
|
* the vap will be marked with IEEE80211_FEXT_SCANREQ
|
|
* and the scan request parameters will be present
|
|
* in iv_scanreq. Otherwise we do the default.
|
|
*/
|
|
if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
|
|
ieee80211_check_scan(vap,
|
|
vap->iv_scanreq_flags,
|
|
vap->iv_scanreq_duration,
|
|
vap->iv_scanreq_mindwell,
|
|
vap->iv_scanreq_maxdwell,
|
|
vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
|
|
vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
|
|
} else
|
|
ieee80211_check_scan_current(vap);
|
|
break;
|
|
case IEEE80211_S_SCAN:
|
|
case IEEE80211_S_AUTH:
|
|
case IEEE80211_S_ASSOC:
|
|
/*
|
|
* These can happen either because of a timeout
|
|
* on an assoc/auth response or because of a
|
|
* change in state that requires a reset. For
|
|
* the former we're called with a non-zero arg
|
|
* that is the cause for the failure; pass this
|
|
* to the scan code so it can update state.
|
|
* Otherwise trigger a new scan unless we're in
|
|
* manual roaming mode in which case an application
|
|
* must issue an explicit scan request.
|
|
*/
|
|
if (arg != 0)
|
|
ieee80211_scan_assoc_fail(vap,
|
|
vap->iv_bss->ni_macaddr, arg);
|
|
if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
|
|
ieee80211_check_scan_current(vap);
|
|
break;
|
|
case IEEE80211_S_SLEEP: /* beacon miss */
|
|
/*
|
|
* XXX if in sleep we need to wakeup the hardware.
|
|
*/
|
|
/* FALLTHROUGH */
|
|
case IEEE80211_S_RUN: /* beacon miss */
|
|
/*
|
|
* Beacon miss. Notify user space and if not
|
|
* under control of a user application (roaming
|
|
* manual) kick off a scan to re-connect.
|
|
*/
|
|
|
|
ieee80211_sta_leave(ni);
|
|
if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
|
|
ieee80211_check_scan_current(vap);
|
|
break;
|
|
default:
|
|
goto invalid;
|
|
}
|
|
break;
|
|
case IEEE80211_S_AUTH:
|
|
switch (ostate) {
|
|
case IEEE80211_S_INIT:
|
|
case IEEE80211_S_SCAN:
|
|
IEEE80211_SEND_MGMT(ni,
|
|
IEEE80211_FC0_SUBTYPE_AUTH, 1);
|
|
break;
|
|
case IEEE80211_S_AUTH:
|
|
case IEEE80211_S_ASSOC:
|
|
switch (arg & 0xff) {
|
|
case IEEE80211_FC0_SUBTYPE_AUTH:
|
|
/* ??? */
|
|
IEEE80211_SEND_MGMT(ni,
|
|
IEEE80211_FC0_SUBTYPE_AUTH, 2);
|
|
break;
|
|
case IEEE80211_FC0_SUBTYPE_DEAUTH:
|
|
sta_authretry(vap, ni, arg>>8);
|
|
break;
|
|
}
|
|
break;
|
|
case IEEE80211_S_SLEEP:
|
|
case IEEE80211_S_RUN:
|
|
switch (arg & 0xff) {
|
|
case IEEE80211_FC0_SUBTYPE_AUTH:
|
|
IEEE80211_SEND_MGMT(ni,
|
|
IEEE80211_FC0_SUBTYPE_AUTH, 2);
|
|
vap->iv_state = IEEE80211_S_RUN; /* stay RUN */
|
|
break;
|
|
case IEEE80211_FC0_SUBTYPE_DEAUTH:
|
|
ieee80211_sta_leave(ni);
|
|
if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) {
|
|
/* try to reauth */
|
|
IEEE80211_SEND_MGMT(ni,
|
|
IEEE80211_FC0_SUBTYPE_AUTH, 1);
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
goto invalid;
|
|
}
|
|
break;
|
|
case IEEE80211_S_ASSOC:
|
|
switch (ostate) {
|
|
case IEEE80211_S_AUTH:
|
|
case IEEE80211_S_ASSOC:
|
|
IEEE80211_SEND_MGMT(ni,
|
|
IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
|
|
break;
|
|
case IEEE80211_S_SLEEP: /* cannot happen */
|
|
case IEEE80211_S_RUN:
|
|
ieee80211_sta_leave(ni);
|
|
if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) {
|
|
IEEE80211_SEND_MGMT(ni, arg ?
|
|
IEEE80211_FC0_SUBTYPE_REASSOC_REQ :
|
|
IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
|
|
}
|
|
break;
|
|
default:
|
|
goto invalid;
|
|
}
|
|
break;
|
|
case IEEE80211_S_RUN:
|
|
if (vap->iv_flags & IEEE80211_F_WPA) {
|
|
/* XXX validate prerequisites */
|
|
}
|
|
switch (ostate) {
|
|
case IEEE80211_S_RUN:
|
|
case IEEE80211_S_CSA:
|
|
break;
|
|
case IEEE80211_S_AUTH: /* when join is done in fw */
|
|
case IEEE80211_S_ASSOC:
|
|
#ifdef IEEE80211_DEBUG
|
|
if (ieee80211_msg_debug(vap)) {
|
|
ieee80211_note(vap, "%s with %s ssid ",
|
|
(vap->iv_opmode == IEEE80211_M_STA ?
|
|
"associated" : "synchronized"),
|
|
ether_sprintf(ni->ni_bssid));
|
|
ieee80211_print_essid(vap->iv_bss->ni_essid,
|
|
ni->ni_esslen);
|
|
/* XXX MCS/HT */
|
|
printf(" channel %d start %uMb\n",
|
|
ieee80211_chan2ieee(ic, ic->ic_curchan),
|
|
IEEE80211_RATE2MBS(ni->ni_txrate));
|
|
}
|
|
#endif
|
|
ieee80211_scan_assoc_success(vap, ni->ni_macaddr);
|
|
ieee80211_notify_node_join(ni,
|
|
arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
|
|
break;
|
|
case IEEE80211_S_SLEEP:
|
|
/* Wake up from sleep */
|
|
vap->iv_sta_ps(vap, 0);
|
|
break;
|
|
default:
|
|
goto invalid;
|
|
}
|
|
ieee80211_sync_curchan(ic);
|
|
if (ostate != IEEE80211_S_RUN)
|
|
sta_swbmiss_start(vap);
|
|
/*
|
|
* When 802.1x is not in use mark the port authorized
|
|
* at this point so traffic can flow.
|
|
*/
|
|
if (ni->ni_authmode != IEEE80211_AUTH_8021X)
|
|
ieee80211_node_authorize(ni);
|
|
/*
|
|
* Fake association when joining an existing bss.
|
|
*
|
|
* Don't do this if we're doing SLEEP->RUN.
|
|
*/
|
|
if (ic->ic_newassoc != NULL && ostate != IEEE80211_S_SLEEP)
|
|
ic->ic_newassoc(vap->iv_bss, (ostate != IEEE80211_S_RUN));
|
|
break;
|
|
case IEEE80211_S_CSA:
|
|
if (ostate != IEEE80211_S_RUN)
|
|
goto invalid;
|
|
break;
|
|
case IEEE80211_S_SLEEP:
|
|
sta_swbmiss_start(vap);
|
|
vap->iv_sta_ps(vap, 1);
|
|
break;
|
|
default:
|
|
invalid:
|
|
IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
|
|
"%s: unexpected state transition %s -> %s\n", __func__,
|
|
ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Return non-zero if the frame is an echo of a multicast
|
|
* frame sent by ourself. The dir is known to be DSTODS.
|
|
*/
|
|
static __inline int
|
|
isdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh)
|
|
{
|
|
#define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh)
|
|
#define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh)
|
|
const uint8_t *sa;
|
|
|
|
KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode"));
|
|
|
|
if (!IEEE80211_IS_MULTICAST(wh->i_addr3))
|
|
return 0;
|
|
sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4;
|
|
return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr);
|
|
#undef WH4
|
|
#undef QWH4
|
|
}
|
|
|
|
/*
|
|
* Return non-zero if the frame is an echo of a multicast
|
|
* frame sent by ourself. The dir is known to be FROMDS.
|
|
*/
|
|
static __inline int
|
|
isfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh)
|
|
{
|
|
KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode"));
|
|
|
|
if (!IEEE80211_IS_MULTICAST(wh->i_addr1))
|
|
return 0;
|
|
return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
|
|
}
|
|
|
|
/*
|
|
* Decide if a received management frame should be
|
|
* printed when debugging is enabled. This filters some
|
|
* of the less interesting frames that come frequently
|
|
* (e.g. beacons).
|
|
*/
|
|
static __inline int
|
|
doprint(struct ieee80211vap *vap, int subtype)
|
|
{
|
|
switch (subtype) {
|
|
case IEEE80211_FC0_SUBTYPE_BEACON:
|
|
return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
|
|
case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Process a received frame. The node associated with the sender
|
|
* should be supplied. If nothing was found in the node table then
|
|
* the caller is assumed to supply a reference to iv_bss instead.
|
|
* The RSSI and a timestamp are also supplied. The RSSI data is used
|
|
* during AP scanning to select a AP to associate with; it can have
|
|
* any units so long as values have consistent units and higher values
|
|
* mean ``better signal''. The receive timestamp is currently not used
|
|
* by the 802.11 layer.
|
|
*/
|
|
static int
|
|
sta_input(struct ieee80211_node *ni, struct mbuf *m,
|
|
const struct ieee80211_rx_stats *rxs, int rssi, int nf)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct ifnet *ifp = vap->iv_ifp;
|
|
struct ieee80211_frame *wh;
|
|
struct ieee80211_key *key;
|
|
struct ether_header *eh;
|
|
int hdrspace, need_tap = 1; /* mbuf need to be tapped. */
|
|
uint8_t dir, type, subtype, qos;
|
|
uint8_t *bssid;
|
|
|
|
if (m->m_flags & M_AMPDU_MPDU) {
|
|
/*
|
|
* Fastpath for A-MPDU reorder q resubmission. Frames
|
|
* w/ M_AMPDU_MPDU marked have already passed through
|
|
* here but were received out of order and been held on
|
|
* the reorder queue. When resubmitted they are marked
|
|
* with the M_AMPDU_MPDU flag and we can bypass most of
|
|
* the normal processing.
|
|
*/
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
type = IEEE80211_FC0_TYPE_DATA;
|
|
dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
|
|
subtype = IEEE80211_FC0_SUBTYPE_QOS;
|
|
hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */
|
|
goto resubmit_ampdu;
|
|
}
|
|
|
|
KASSERT(ni != NULL, ("null node"));
|
|
ni->ni_inact = ni->ni_inact_reload;
|
|
|
|
type = -1; /* undefined */
|
|
|
|
if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
|
|
ni->ni_macaddr, NULL,
|
|
"too short (1): len %u", m->m_pkthdr.len);
|
|
vap->iv_stats.is_rx_tooshort++;
|
|
goto out;
|
|
}
|
|
/*
|
|
* Bit of a cheat here, we use a pointer for a 3-address
|
|
* frame format but don't reference fields past outside
|
|
* ieee80211_frame_min w/o first validating the data is
|
|
* present.
|
|
*/
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
|
|
if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
|
|
IEEE80211_FC0_VERSION_0) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
|
|
ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
|
|
wh->i_fc[0], wh->i_fc[1]);
|
|
vap->iv_stats.is_rx_badversion++;
|
|
goto err;
|
|
}
|
|
|
|
dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
|
|
type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
|
|
subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
|
|
if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
|
|
bssid = wh->i_addr2;
|
|
if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) {
|
|
/* not interested in */
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
|
|
bssid, NULL, "%s", "not to bss");
|
|
vap->iv_stats.is_rx_wrongbss++;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Some devices may be in a promiscuous mode
|
|
* where they receive frames for multiple station
|
|
* addresses.
|
|
*
|
|
* If we receive a data frame that isn't
|
|
* destined to our VAP MAC, drop it.
|
|
*
|
|
* XXX TODO: This is only enforced when not scanning;
|
|
* XXX it assumes a software-driven scan will put the NIC
|
|
* XXX into a "no data frames" mode before setting this
|
|
* XXX flag. Otherwise it may be possible that we'll still
|
|
* XXX process data frames whilst scanning.
|
|
*/
|
|
if ((! IEEE80211_IS_MULTICAST(wh->i_addr1))
|
|
&& (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
|
|
bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D",
|
|
IF_LLADDR(ifp), ":", wh->i_addr1, ":");
|
|
vap->iv_stats.is_rx_wrongbss++;
|
|
goto out;
|
|
}
|
|
|
|
IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
|
|
ni->ni_noise = nf;
|
|
if ( IEEE80211_HAS_SEQ(type, subtype) &&
|
|
!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
|
|
uint8_t tid = ieee80211_gettid(wh);
|
|
if (IEEE80211_QOS_HAS_SEQ(wh) &&
|
|
TID_TO_WME_AC(tid) >= WME_AC_VI)
|
|
ic->ic_wme.wme_hipri_traffic++;
|
|
if (! ieee80211_check_rxseq(ni, wh, bssid))
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
switch (type) {
|
|
case IEEE80211_FC0_TYPE_DATA:
|
|
hdrspace = ieee80211_hdrspace(ic, wh);
|
|
if (m->m_len < hdrspace &&
|
|
(m = m_pullup(m, hdrspace)) == NULL) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
|
|
ni->ni_macaddr, NULL,
|
|
"data too short: expecting %u", hdrspace);
|
|
vap->iv_stats.is_rx_tooshort++;
|
|
goto out; /* XXX */
|
|
}
|
|
/*
|
|
* Handle A-MPDU re-ordering. If the frame is to be
|
|
* processed directly then ieee80211_ampdu_reorder
|
|
* will return 0; otherwise it has consumed the mbuf
|
|
* and we should do nothing more with it.
|
|
*/
|
|
if ((m->m_flags & M_AMPDU) &&
|
|
(dir == IEEE80211_FC1_DIR_FROMDS ||
|
|
dir == IEEE80211_FC1_DIR_DSTODS) &&
|
|
ieee80211_ampdu_reorder(ni, m) != 0) {
|
|
m = NULL;
|
|
goto out;
|
|
}
|
|
resubmit_ampdu:
|
|
if (dir == IEEE80211_FC1_DIR_FROMDS) {
|
|
if ((ifp->if_flags & IFF_SIMPLEX) &&
|
|
isfromds_mcastecho(vap, wh)) {
|
|
/*
|
|
* In IEEE802.11 network, multicast
|
|
* packets sent from "me" are broadcast
|
|
* from the AP; silently discard for
|
|
* SIMPLEX interface.
|
|
*/
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, "data", "%s", "multicast echo");
|
|
vap->iv_stats.is_rx_mcastecho++;
|
|
goto out;
|
|
}
|
|
if ((vap->iv_flags & IEEE80211_F_DWDS) &&
|
|
IEEE80211_IS_MULTICAST(wh->i_addr1)) {
|
|
/*
|
|
* DWDS sta's must drop 3-address mcast frames
|
|
* as they will be sent separately as a 4-addr
|
|
* frame. Accepting the 3-addr frame will
|
|
* confuse the bridge into thinking the sending
|
|
* sta is located at the end of WDS link.
|
|
*/
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
|
|
"3-address data", "%s", "DWDS enabled");
|
|
vap->iv_stats.is_rx_mcastecho++;
|
|
goto out;
|
|
}
|
|
} else if (dir == IEEE80211_FC1_DIR_DSTODS) {
|
|
if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) {
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_INPUT, wh, "4-address data",
|
|
"%s", "DWDS not enabled");
|
|
vap->iv_stats.is_rx_wrongdir++;
|
|
goto out;
|
|
}
|
|
if ((ifp->if_flags & IFF_SIMPLEX) &&
|
|
isdstods_mcastecho(vap, wh)) {
|
|
/*
|
|
* In IEEE802.11 network, multicast
|
|
* packets sent from "me" are broadcast
|
|
* from the AP; silently discard for
|
|
* SIMPLEX interface.
|
|
*/
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
|
|
"4-address data", "%s", "multicast echo");
|
|
vap->iv_stats.is_rx_mcastecho++;
|
|
goto out;
|
|
}
|
|
} else {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
|
|
"data", "incorrect dir 0x%x", dir);
|
|
vap->iv_stats.is_rx_wrongdir++;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Handle privacy requirements. Note that we
|
|
* must not be preempted from here until after
|
|
* we (potentially) call ieee80211_crypto_demic;
|
|
* otherwise we may violate assumptions in the
|
|
* crypto cipher modules used to do delayed update
|
|
* of replay sequence numbers.
|
|
*/
|
|
if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
|
|
if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
|
|
/*
|
|
* Discard encrypted frames when privacy is off.
|
|
*/
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, "WEP", "%s", "PRIVACY off");
|
|
vap->iv_stats.is_rx_noprivacy++;
|
|
IEEE80211_NODE_STAT(ni, rx_noprivacy);
|
|
goto out;
|
|
}
|
|
key = ieee80211_crypto_decap(ni, m, hdrspace);
|
|
if (key == NULL) {
|
|
/* NB: stats+msgs handled in crypto_decap */
|
|
IEEE80211_NODE_STAT(ni, rx_wepfail);
|
|
goto out;
|
|
}
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
|
|
} else {
|
|
/* XXX M_WEP and IEEE80211_F_PRIVACY */
|
|
key = NULL;
|
|
}
|
|
|
|
/*
|
|
* Save QoS bits for use below--before we strip the header.
|
|
*/
|
|
if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
|
|
qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
|
|
((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
|
|
((struct ieee80211_qosframe *)wh)->i_qos[0];
|
|
} else
|
|
qos = 0;
|
|
|
|
/*
|
|
* Next up, any fragmentation.
|
|
*/
|
|
if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
|
|
m = ieee80211_defrag(ni, m, hdrspace);
|
|
if (m == NULL) {
|
|
/* Fragment dropped or frame not complete yet */
|
|
goto out;
|
|
}
|
|
}
|
|
wh = NULL; /* no longer valid, catch any uses */
|
|
|
|
/*
|
|
* Next strip any MSDU crypto bits.
|
|
*/
|
|
if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
|
|
ni->ni_macaddr, "data", "%s", "demic error");
|
|
vap->iv_stats.is_rx_demicfail++;
|
|
IEEE80211_NODE_STAT(ni, rx_demicfail);
|
|
goto out;
|
|
}
|
|
|
|
/* copy to listener after decrypt */
|
|
if (ieee80211_radiotap_active_vap(vap))
|
|
ieee80211_radiotap_rx(vap, m);
|
|
need_tap = 0;
|
|
|
|
/*
|
|
* Finally, strip the 802.11 header.
|
|
*/
|
|
m = ieee80211_decap(vap, m, hdrspace);
|
|
if (m == NULL) {
|
|
/* XXX mask bit to check for both */
|
|
/* don't count Null data frames as errors */
|
|
if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
|
|
subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
|
|
goto out;
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
|
|
ni->ni_macaddr, "data", "%s", "decap error");
|
|
vap->iv_stats.is_rx_decap++;
|
|
IEEE80211_NODE_STAT(ni, rx_decap);
|
|
goto err;
|
|
}
|
|
eh = mtod(m, struct ether_header *);
|
|
if (!ieee80211_node_is_authorized(ni)) {
|
|
/*
|
|
* Deny any non-PAE frames received prior to
|
|
* authorization. For open/shared-key
|
|
* authentication the port is mark authorized
|
|
* after authentication completes. For 802.1x
|
|
* the port is not marked authorized by the
|
|
* authenticator until the handshake has completed.
|
|
*/
|
|
if (eh->ether_type != htons(ETHERTYPE_PAE)) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
|
|
eh->ether_shost, "data",
|
|
"unauthorized port: ether type 0x%x len %u",
|
|
eh->ether_type, m->m_pkthdr.len);
|
|
vap->iv_stats.is_rx_unauth++;
|
|
IEEE80211_NODE_STAT(ni, rx_unauth);
|
|
goto err;
|
|
}
|
|
} else {
|
|
/*
|
|
* When denying unencrypted frames, discard
|
|
* any non-PAE frames received without encryption.
|
|
*/
|
|
if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
|
|
(key == NULL && (m->m_flags & M_WEP) == 0) &&
|
|
eh->ether_type != htons(ETHERTYPE_PAE)) {
|
|
/*
|
|
* Drop unencrypted frames.
|
|
*/
|
|
vap->iv_stats.is_rx_unencrypted++;
|
|
IEEE80211_NODE_STAT(ni, rx_unencrypted);
|
|
goto out;
|
|
}
|
|
}
|
|
/* XXX require HT? */
|
|
if (qos & IEEE80211_QOS_AMSDU) {
|
|
m = ieee80211_decap_amsdu(ni, m);
|
|
if (m == NULL)
|
|
return IEEE80211_FC0_TYPE_DATA;
|
|
} else {
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
m = ieee80211_decap_fastframe(vap, ni, m);
|
|
if (m == NULL)
|
|
return IEEE80211_FC0_TYPE_DATA;
|
|
#endif
|
|
}
|
|
ieee80211_deliver_data(vap, ni, m);
|
|
return IEEE80211_FC0_TYPE_DATA;
|
|
|
|
case IEEE80211_FC0_TYPE_MGT:
|
|
vap->iv_stats.is_rx_mgmt++;
|
|
IEEE80211_NODE_STAT(ni, rx_mgmt);
|
|
if (dir != IEEE80211_FC1_DIR_NODS) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, "data", "incorrect dir 0x%x", dir);
|
|
vap->iv_stats.is_rx_wrongdir++;
|
|
goto err;
|
|
}
|
|
if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
|
|
ni->ni_macaddr, "mgt", "too short: len %u",
|
|
m->m_pkthdr.len);
|
|
vap->iv_stats.is_rx_tooshort++;
|
|
goto out;
|
|
}
|
|
#ifdef IEEE80211_DEBUG
|
|
if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
|
|
ieee80211_msg_dumppkts(vap)) {
|
|
if_printf(ifp, "received %s from %s rssi %d\n",
|
|
ieee80211_mgt_subtype_name[subtype >>
|
|
IEEE80211_FC0_SUBTYPE_SHIFT],
|
|
ether_sprintf(wh->i_addr2), rssi);
|
|
}
|
|
#endif
|
|
if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
|
|
if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) {
|
|
/*
|
|
* Only shared key auth frames with a challenge
|
|
* should be encrypted, discard all others.
|
|
*/
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, ieee80211_mgt_subtype_name[subtype >>
|
|
IEEE80211_FC0_SUBTYPE_SHIFT],
|
|
"%s", "WEP set but not permitted");
|
|
vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
|
|
goto out;
|
|
}
|
|
if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
|
|
/*
|
|
* Discard encrypted frames when privacy is off.
|
|
*/
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, "mgt", "%s", "WEP set but PRIVACY off");
|
|
vap->iv_stats.is_rx_noprivacy++;
|
|
goto out;
|
|
}
|
|
hdrspace = ieee80211_hdrspace(ic, wh);
|
|
key = ieee80211_crypto_decap(ni, m, hdrspace);
|
|
if (key == NULL) {
|
|
/* NB: stats+msgs handled in crypto_decap */
|
|
goto out;
|
|
}
|
|
wh = mtod(m, struct ieee80211_frame *);
|
|
wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
|
|
}
|
|
vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
|
|
goto out;
|
|
|
|
case IEEE80211_FC0_TYPE_CTL:
|
|
vap->iv_stats.is_rx_ctl++;
|
|
IEEE80211_NODE_STAT(ni, rx_ctrl);
|
|
vap->iv_recv_ctl(ni, m, subtype);
|
|
goto out;
|
|
|
|
default:
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
|
|
wh, NULL, "bad frame type 0x%x", type);
|
|
/* should not come here */
|
|
break;
|
|
}
|
|
err:
|
|
if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
|
|
out:
|
|
if (m != NULL) {
|
|
if (need_tap && ieee80211_radiotap_active_vap(vap))
|
|
ieee80211_radiotap_rx(vap, m);
|
|
m_freem(m);
|
|
}
|
|
return type;
|
|
}
|
|
|
|
static void
|
|
sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh,
|
|
int rssi, int nf, uint16_t seq, uint16_t status)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
|
|
if (ni->ni_authmode == IEEE80211_AUTH_SHARED) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
|
|
ni->ni_macaddr, "open auth",
|
|
"bad sta auth mode %u", ni->ni_authmode);
|
|
vap->iv_stats.is_rx_bad_auth++; /* XXX */
|
|
return;
|
|
}
|
|
if (vap->iv_state != IEEE80211_S_AUTH ||
|
|
seq != IEEE80211_AUTH_OPEN_RESPONSE) {
|
|
vap->iv_stats.is_rx_bad_auth++;
|
|
return;
|
|
}
|
|
if (status != 0) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
|
|
ni, "open auth failed (reason %d)", status);
|
|
vap->iv_stats.is_rx_auth_fail++;
|
|
vap->iv_stats.is_rx_authfail_code = status;
|
|
ieee80211_new_state(vap, IEEE80211_S_SCAN,
|
|
IEEE80211_SCAN_FAIL_STATUS);
|
|
} else
|
|
ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
|
|
}
|
|
|
|
static void
|
|
sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh,
|
|
uint8_t *frm, uint8_t *efrm, int rssi, int nf,
|
|
uint16_t seq, uint16_t status)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
uint8_t *challenge;
|
|
int estatus;
|
|
|
|
/*
|
|
* NB: this can happen as we allow pre-shared key
|
|
* authentication to be enabled w/o wep being turned
|
|
* on so that configuration of these can be done
|
|
* in any order. It may be better to enforce the
|
|
* ordering in which case this check would just be
|
|
* for sanity/consistency.
|
|
*/
|
|
if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
|
|
ni->ni_macaddr, "shared key auth",
|
|
"%s", " PRIVACY is disabled");
|
|
estatus = IEEE80211_STATUS_ALG;
|
|
goto bad;
|
|
}
|
|
/*
|
|
* Pre-shared key authentication is evil; accept
|
|
* it only if explicitly configured (it is supported
|
|
* mainly for compatibility with clients like OS X).
|
|
*/
|
|
if (ni->ni_authmode != IEEE80211_AUTH_AUTO &&
|
|
ni->ni_authmode != IEEE80211_AUTH_SHARED) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
|
|
ni->ni_macaddr, "shared key auth",
|
|
"bad sta auth mode %u", ni->ni_authmode);
|
|
vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */
|
|
estatus = IEEE80211_STATUS_ALG;
|
|
goto bad;
|
|
}
|
|
|
|
challenge = NULL;
|
|
if (frm + 1 < efrm) {
|
|
if ((frm[1] + 2) > (efrm - frm)) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
|
|
ni->ni_macaddr, "shared key auth",
|
|
"ie %d/%d too long",
|
|
frm[0], (frm[1] + 2) - (efrm - frm));
|
|
vap->iv_stats.is_rx_bad_auth++;
|
|
estatus = IEEE80211_STATUS_CHALLENGE;
|
|
goto bad;
|
|
}
|
|
if (*frm == IEEE80211_ELEMID_CHALLENGE)
|
|
challenge = frm;
|
|
frm += frm[1] + 2;
|
|
}
|
|
switch (seq) {
|
|
case IEEE80211_AUTH_SHARED_CHALLENGE:
|
|
case IEEE80211_AUTH_SHARED_RESPONSE:
|
|
if (challenge == NULL) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
|
|
ni->ni_macaddr, "shared key auth",
|
|
"%s", "no challenge");
|
|
vap->iv_stats.is_rx_bad_auth++;
|
|
estatus = IEEE80211_STATUS_CHALLENGE;
|
|
goto bad;
|
|
}
|
|
if (challenge[1] != IEEE80211_CHALLENGE_LEN) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
|
|
ni->ni_macaddr, "shared key auth",
|
|
"bad challenge len %d", challenge[1]);
|
|
vap->iv_stats.is_rx_bad_auth++;
|
|
estatus = IEEE80211_STATUS_CHALLENGE;
|
|
goto bad;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
if (vap->iv_state != IEEE80211_S_AUTH)
|
|
return;
|
|
switch (seq) {
|
|
case IEEE80211_AUTH_SHARED_PASS:
|
|
if (ni->ni_challenge != NULL) {
|
|
IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
|
|
ni->ni_challenge = NULL;
|
|
}
|
|
if (status != 0) {
|
|
IEEE80211_NOTE_FRAME(vap,
|
|
IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh,
|
|
"shared key auth failed (reason %d)", status);
|
|
vap->iv_stats.is_rx_auth_fail++;
|
|
vap->iv_stats.is_rx_authfail_code = status;
|
|
return;
|
|
}
|
|
ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
|
|
break;
|
|
case IEEE80211_AUTH_SHARED_CHALLENGE:
|
|
if (!ieee80211_alloc_challenge(ni))
|
|
return;
|
|
/* XXX could optimize by passing recvd challenge */
|
|
memcpy(ni->ni_challenge, &challenge[2], challenge[1]);
|
|
IEEE80211_SEND_MGMT(ni,
|
|
IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
|
|
break;
|
|
default:
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH,
|
|
wh, "shared key auth", "bad seq %d", seq);
|
|
vap->iv_stats.is_rx_bad_auth++;
|
|
return;
|
|
}
|
|
return;
|
|
bad:
|
|
/*
|
|
* Kick the state machine. This short-circuits
|
|
* using the mgt frame timeout to trigger the
|
|
* state transition.
|
|
*/
|
|
if (vap->iv_state == IEEE80211_S_AUTH)
|
|
ieee80211_new_state(vap, IEEE80211_S_SCAN,
|
|
IEEE80211_SCAN_FAIL_STATUS);
|
|
}
|
|
|
|
int
|
|
ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm,
|
|
const struct ieee80211_frame *wh)
|
|
{
|
|
#define MS(_v, _f) (((_v) & _f) >> _f##_S)
|
|
struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme;
|
|
u_int len = frm[1], qosinfo;
|
|
int i;
|
|
|
|
if (len < sizeof(struct ieee80211_wme_param)-2) {
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME,
|
|
wh, "WME", "too short, len %u", len);
|
|
return -1;
|
|
}
|
|
qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)];
|
|
qosinfo &= WME_QOSINFO_COUNT;
|
|
/* XXX do proper check for wraparound */
|
|
if (qosinfo == wme->wme_wmeChanParams.cap_info)
|
|
return 0;
|
|
frm += __offsetof(struct ieee80211_wme_param, params_acParams);
|
|
for (i = 0; i < WME_NUM_AC; i++) {
|
|
struct wmeParams *wmep =
|
|
&wme->wme_wmeChanParams.cap_wmeParams[i];
|
|
/* NB: ACI not used */
|
|
wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM);
|
|
wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN);
|
|
wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN);
|
|
wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX);
|
|
wmep->wmep_txopLimit = LE_READ_2(frm+2);
|
|
frm += 4;
|
|
}
|
|
wme->wme_wmeChanParams.cap_info = qosinfo;
|
|
return 1;
|
|
#undef MS
|
|
}
|
|
|
|
/*
|
|
* Process 11h Channel Switch Announcement (CSA) ie. If this
|
|
* is the first CSA then initiate the switch. Otherwise we
|
|
* track state and trigger completion and/or cancel of the switch.
|
|
* XXX should be public for IBSS use
|
|
*/
|
|
static void
|
|
ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm,
|
|
const struct ieee80211_frame *wh)
|
|
{
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
const struct ieee80211_csa_ie *csa =
|
|
(const struct ieee80211_csa_ie *) frm;
|
|
|
|
KASSERT(vap->iv_state >= IEEE80211_S_RUN,
|
|
("state %s", ieee80211_state_name[vap->iv_state]));
|
|
|
|
if (csa->csa_mode > 1) {
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
|
|
wh, "CSA", "invalid mode %u", csa->csa_mode);
|
|
return;
|
|
}
|
|
IEEE80211_LOCK(ic);
|
|
if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
|
|
/*
|
|
* Convert the channel number to a channel reference. We
|
|
* try first to preserve turbo attribute of the current
|
|
* channel then fallback. Note this will not work if the
|
|
* CSA specifies a channel that requires a band switch (e.g.
|
|
* 11a => 11g). This is intentional as 11h is defined only
|
|
* for 5GHz/11a and because the switch does not involve a
|
|
* reassociation, protocol state (capabilities, negotated
|
|
* rates, etc) may/will be wrong.
|
|
*/
|
|
struct ieee80211_channel *c =
|
|
ieee80211_find_channel_byieee(ic, csa->csa_newchan,
|
|
(ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO));
|
|
if (c == NULL) {
|
|
c = ieee80211_find_channel_byieee(ic,
|
|
csa->csa_newchan,
|
|
(ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL));
|
|
if (c == NULL) {
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
|
|
wh, "CSA", "invalid channel %u",
|
|
csa->csa_newchan);
|
|
goto done;
|
|
}
|
|
}
|
|
#if IEEE80211_CSA_COUNT_MIN > 0
|
|
if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) {
|
|
/*
|
|
* Require at least IEEE80211_CSA_COUNT_MIN count to
|
|
* reduce the risk of being redirected by a fabricated
|
|
* CSA. If a valid CSA is dropped we'll still get a
|
|
* beacon miss when the AP leaves the channel so we'll
|
|
* eventually follow to the new channel.
|
|
*
|
|
* NOTE: this violates the 11h spec that states that
|
|
* count may be any value and if 0 then a switch
|
|
* should happen asap.
|
|
*/
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
|
|
wh, "CSA", "count %u too small, must be >= %u",
|
|
csa->csa_count, IEEE80211_CSA_COUNT_MIN);
|
|
goto done;
|
|
}
|
|
#endif
|
|
ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count);
|
|
} else {
|
|
/*
|
|
* Validate this ie against the initial CSA. We require
|
|
* mode and channel not change and the count must be
|
|
* monotonically decreasing. This may be pointless and
|
|
* canceling the switch as a result may be too paranoid but
|
|
* in the worst case if we drop out of CSA because of this
|
|
* and the AP does move then we'll just end up taking a
|
|
* beacon miss and scan to find the AP.
|
|
*
|
|
* XXX may want <= on count as we also process ProbeResp
|
|
* frames and those may come in w/ the same count as the
|
|
* previous beacon; but doing so leaves us open to a stuck
|
|
* count until we add a dead-man timer
|
|
*/
|
|
if (!(csa->csa_count < ic->ic_csa_count &&
|
|
csa->csa_mode == ic->ic_csa_mode &&
|
|
csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) {
|
|
IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh,
|
|
"CSA ie mismatch, initial ie <%d,%d,%d>, "
|
|
"this ie <%d,%d,%d>", ic->ic_csa_mode,
|
|
ic->ic_csa_newchan, ic->ic_csa_count,
|
|
csa->csa_mode, csa->csa_newchan, csa->csa_count);
|
|
ieee80211_csa_cancelswitch(ic);
|
|
} else {
|
|
if (csa->csa_count <= 1)
|
|
ieee80211_csa_completeswitch(ic);
|
|
else
|
|
ic->ic_csa_count = csa->csa_count;
|
|
}
|
|
}
|
|
done:
|
|
IEEE80211_UNLOCK(ic);
|
|
}
|
|
|
|
/*
|
|
* Return non-zero if a background scan may be continued:
|
|
* o bg scan is active
|
|
* o no channel switch is pending
|
|
* o there has not been any traffic recently
|
|
*
|
|
* Note we do not check if there is an administrative enable;
|
|
* this is only done to start the scan. We assume that any
|
|
* change in state will be accompanied by a request to cancel
|
|
* active scans which will otherwise cause this test to fail.
|
|
*/
|
|
static __inline int
|
|
contbgscan(struct ieee80211vap *vap)
|
|
{
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
|
|
return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) &&
|
|
(ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 &&
|
|
vap->iv_state == IEEE80211_S_RUN && /* XXX? */
|
|
ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle));
|
|
}
|
|
|
|
/*
|
|
* Return non-zero if a backgrond scan may be started:
|
|
* o bg scanning is administratively enabled
|
|
* o no channel switch is pending
|
|
* o we are not boosted on a dynamic turbo channel
|
|
* o there has not been a scan recently
|
|
* o there has not been any traffic recently
|
|
*/
|
|
static __inline int
|
|
startbgscan(struct ieee80211vap *vap)
|
|
{
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
|
|
return ((vap->iv_flags & IEEE80211_F_BGSCAN) &&
|
|
(ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 &&
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
!IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) &&
|
|
#endif
|
|
ieee80211_time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) &&
|
|
ieee80211_time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle));
|
|
}
|
|
|
|
static void
|
|
sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype,
|
|
const struct ieee80211_rx_stats *rxs,
|
|
int rssi, int nf)
|
|
{
|
|
#define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP)
|
|
#define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP)
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct ieee80211_channel *rxchan = ic->ic_curchan;
|
|
struct ieee80211_frame *wh;
|
|
uint8_t *frm, *efrm;
|
|
uint8_t *rates, *xrates, *wme, *htcap, *htinfo;
|
|
uint8_t rate;
|
|
int ht_state_change = 0;
|
|
|
|
wh = mtod(m0, struct ieee80211_frame *);
|
|
frm = (uint8_t *)&wh[1];
|
|
efrm = mtod(m0, uint8_t *) + m0->m_len;
|
|
switch (subtype) {
|
|
case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
|
|
case IEEE80211_FC0_SUBTYPE_BEACON: {
|
|
struct ieee80211_scanparams scan;
|
|
struct ieee80211_channel *c;
|
|
/*
|
|
* We process beacon/probe response frames:
|
|
* o when scanning, or
|
|
* o station mode when associated (to collect state
|
|
* updates such as 802.11g slot time)
|
|
* Frames otherwise received are discarded.
|
|
*/
|
|
if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) {
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
return;
|
|
}
|
|
|
|
/* Override RX channel as appropriate */
|
|
if (rxs != NULL) {
|
|
c = ieee80211_lookup_channel_rxstatus(vap, rxs);
|
|
if (c != NULL)
|
|
rxchan = c;
|
|
}
|
|
|
|
/* XXX probe response in sta mode when !scanning? */
|
|
if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) {
|
|
if (! (ic->ic_flags & IEEE80211_F_SCAN))
|
|
vap->iv_stats.is_beacon_bad++;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Count frame now that we know it's to be processed.
|
|
*/
|
|
if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
|
|
vap->iv_stats.is_rx_beacon++; /* XXX remove */
|
|
IEEE80211_NODE_STAT(ni, rx_beacons);
|
|
} else
|
|
IEEE80211_NODE_STAT(ni, rx_proberesp);
|
|
/*
|
|
* When operating in station mode, check for state updates.
|
|
* Be careful to ignore beacons received while doing a
|
|
* background scan. We consider only 11g/WMM stuff right now.
|
|
*/
|
|
if (ni->ni_associd != 0 &&
|
|
((ic->ic_flags & IEEE80211_F_SCAN) == 0 ||
|
|
IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) {
|
|
/* record tsf of last beacon */
|
|
memcpy(ni->ni_tstamp.data, scan.tstamp,
|
|
sizeof(ni->ni_tstamp));
|
|
/* count beacon frame for s/w bmiss handling */
|
|
vap->iv_swbmiss_count++;
|
|
vap->iv_bmiss_count = 0;
|
|
if (ni->ni_erp != scan.erp) {
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
|
|
wh->i_addr2,
|
|
"erp change: was 0x%x, now 0x%x",
|
|
ni->ni_erp, scan.erp);
|
|
if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
|
|
(ni->ni_erp & IEEE80211_ERP_USE_PROTECTION))
|
|
ic->ic_flags |= IEEE80211_F_USEPROT;
|
|
else
|
|
ic->ic_flags &= ~IEEE80211_F_USEPROT;
|
|
ni->ni_erp = scan.erp;
|
|
/* XXX statistic */
|
|
/* XXX driver notification */
|
|
}
|
|
if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) {
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
|
|
wh->i_addr2,
|
|
"capabilities change: was 0x%x, now 0x%x",
|
|
ni->ni_capinfo, scan.capinfo);
|
|
/*
|
|
* NB: we assume short preamble doesn't
|
|
* change dynamically
|
|
*/
|
|
ieee80211_set_shortslottime(ic,
|
|
IEEE80211_IS_CHAN_A(ic->ic_bsschan) ||
|
|
(scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME));
|
|
ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME)
|
|
| (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME);
|
|
/* XXX statistic */
|
|
}
|
|
if (scan.wme != NULL &&
|
|
(ni->ni_flags & IEEE80211_NODE_QOS) &&
|
|
ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0)
|
|
ieee80211_wme_updateparams(vap);
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
if (scan.ath != NULL)
|
|
ieee80211_parse_athparams(ni, scan.ath, wh);
|
|
#endif
|
|
if (scan.htcap != NULL && scan.htinfo != NULL &&
|
|
(vap->iv_flags_ht & IEEE80211_FHT_HT)) {
|
|
/* XXX state changes? */
|
|
if (ieee80211_ht_updateparams(ni,
|
|
scan.htcap, scan.htinfo))
|
|
ht_state_change = 1;
|
|
}
|
|
if (scan.quiet)
|
|
ic->ic_set_quiet(ni, scan.quiet);
|
|
|
|
if (scan.tim != NULL) {
|
|
struct ieee80211_tim_ie *tim =
|
|
(struct ieee80211_tim_ie *) scan.tim;
|
|
/*
|
|
* XXX Check/debug this code; see if it's about
|
|
* the right time to force the VAP awake if we
|
|
* receive a frame destined for us?
|
|
*/
|
|
int aid = IEEE80211_AID(ni->ni_associd);
|
|
int ix = aid / NBBY;
|
|
int min = tim->tim_bitctl &~ 1;
|
|
int max = tim->tim_len + min - 4;
|
|
int tim_ucast = 0, tim_mcast = 0;
|
|
|
|
/*
|
|
* Only do this for unicast traffic in the TIM
|
|
* The multicast traffic notification for
|
|
* the scan notification stuff should occur
|
|
* differently.
|
|
*/
|
|
if (min <= ix && ix <= max &&
|
|
isset(tim->tim_bitmap - min, aid)) {
|
|
tim_ucast = 1;
|
|
}
|
|
|
|
/*
|
|
* Do a separate notification
|
|
* for the multicast bit being set.
|
|
*/
|
|
if (tim->tim_bitctl & 1) {
|
|
tim_mcast = 1;
|
|
}
|
|
|
|
/*
|
|
* If the TIM indicates there's traffic for
|
|
* us then get us out of STA mode powersave.
|
|
*/
|
|
if (tim_ucast == 1) {
|
|
|
|
/*
|
|
* Wake us out of SLEEP state if we're
|
|
* in it; and if we're doing bgscan
|
|
* then wake us out of STA powersave.
|
|
*/
|
|
ieee80211_sta_tim_notify(vap, 1);
|
|
|
|
/*
|
|
* This is preventing us from
|
|
* continuing a bgscan; because it
|
|
* tricks the contbgscan()
|
|
* routine to think there's always
|
|
* traffic for us.
|
|
*
|
|
* I think we need both an RX and
|
|
* TX ic_lastdata field.
|
|
*/
|
|
ic->ic_lastdata = ticks;
|
|
}
|
|
|
|
ni->ni_dtim_count = tim->tim_count;
|
|
ni->ni_dtim_period = tim->tim_period;
|
|
}
|
|
if (scan.csa != NULL &&
|
|
(vap->iv_flags & IEEE80211_F_DOTH))
|
|
ieee80211_parse_csaparams(vap, scan.csa, wh);
|
|
else if (ic->ic_flags & IEEE80211_F_CSAPENDING) {
|
|
/*
|
|
* No CSA ie or 11h disabled, but a channel
|
|
* switch is pending; drop out so we aren't
|
|
* stuck in CSA state. If the AP really is
|
|
* moving we'll get a beacon miss and scan.
|
|
*/
|
|
IEEE80211_LOCK(ic);
|
|
ieee80211_csa_cancelswitch(ic);
|
|
IEEE80211_UNLOCK(ic);
|
|
}
|
|
/*
|
|
* If scanning, pass the info to the scan module.
|
|
* Otherwise, check if it's the right time to do
|
|
* a background scan. Background scanning must
|
|
* be enabled and we must not be operating in the
|
|
* turbo phase of dynamic turbo mode. Then,
|
|
* it's been a while since the last background
|
|
* scan and if no data frames have come through
|
|
* recently, kick off a scan. Note that this
|
|
* is the mechanism by which a background scan
|
|
* is started _and_ continued each time we
|
|
* return on-channel to receive a beacon from
|
|
* our ap.
|
|
*/
|
|
if (ic->ic_flags & IEEE80211_F_SCAN) {
|
|
ieee80211_add_scan(vap, rxchan,
|
|
&scan, wh, subtype, rssi, nf);
|
|
} else if (contbgscan(vap)) {
|
|
ieee80211_bg_scan(vap, 0);
|
|
} else if (startbgscan(vap)) {
|
|
vap->iv_stats.is_scan_bg++;
|
|
#if 0
|
|
/* wakeup if we are sleeing */
|
|
ieee80211_set_pwrsave(vap, 0);
|
|
#endif
|
|
ieee80211_bg_scan(vap, 0);
|
|
}
|
|
|
|
/*
|
|
* Put the station to sleep if we haven't seen
|
|
* traffic in a while.
|
|
*/
|
|
IEEE80211_LOCK(ic);
|
|
ieee80211_sta_ps_timer_check(vap);
|
|
IEEE80211_UNLOCK(ic);
|
|
|
|
/*
|
|
* If we've had a channel width change (eg HT20<->HT40)
|
|
* then schedule a delayed driver notification.
|
|
*/
|
|
if (ht_state_change)
|
|
ieee80211_update_chw(ic);
|
|
return;
|
|
}
|
|
/*
|
|
* If scanning, just pass information to the scan module.
|
|
*/
|
|
if (ic->ic_flags & IEEE80211_F_SCAN) {
|
|
if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
|
|
/*
|
|
* Actively scanning a channel marked passive;
|
|
* send a probe request now that we know there
|
|
* is 802.11 traffic present.
|
|
*
|
|
* XXX check if the beacon we recv'd gives
|
|
* us what we need and suppress the probe req
|
|
*/
|
|
ieee80211_probe_curchan(vap, 1);
|
|
ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
|
|
}
|
|
ieee80211_add_scan(vap, rxchan, &scan, wh,
|
|
subtype, rssi, nf);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case IEEE80211_FC0_SUBTYPE_AUTH: {
|
|
uint16_t algo, seq, status;
|
|
/*
|
|
* auth frame format
|
|
* [2] algorithm
|
|
* [2] sequence
|
|
* [2] status
|
|
* [tlv*] challenge
|
|
*/
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
|
|
algo = le16toh(*(uint16_t *)frm);
|
|
seq = le16toh(*(uint16_t *)(frm + 2));
|
|
status = le16toh(*(uint16_t *)(frm + 4));
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2,
|
|
"recv auth frame with algorithm %d seq %d", algo, seq);
|
|
|
|
if (vap->iv_flags & IEEE80211_F_COUNTERM) {
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
|
|
wh, "auth", "%s", "TKIP countermeasures enabled");
|
|
vap->iv_stats.is_rx_auth_countermeasures++;
|
|
if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
|
|
ieee80211_send_error(ni, wh->i_addr2,
|
|
IEEE80211_FC0_SUBTYPE_AUTH,
|
|
IEEE80211_REASON_MIC_FAILURE);
|
|
}
|
|
return;
|
|
}
|
|
if (algo == IEEE80211_AUTH_ALG_SHARED)
|
|
sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf,
|
|
seq, status);
|
|
else if (algo == IEEE80211_AUTH_ALG_OPEN)
|
|
sta_auth_open(ni, wh, rssi, nf, seq, status);
|
|
else {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
|
|
wh, "auth", "unsupported alg %d", algo);
|
|
vap->iv_stats.is_rx_auth_unsupported++;
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
|
|
case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: {
|
|
uint16_t capinfo, associd;
|
|
uint16_t status;
|
|
|
|
if (vap->iv_state != IEEE80211_S_ASSOC) {
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* asresp frame format
|
|
* [2] capability information
|
|
* [2] status
|
|
* [2] association ID
|
|
* [tlv] supported rates
|
|
* [tlv] extended supported rates
|
|
* [tlv] WME
|
|
* [tlv] HT capabilities
|
|
* [tlv] HT info
|
|
*/
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
|
|
ni = vap->iv_bss;
|
|
capinfo = le16toh(*(uint16_t *)frm);
|
|
frm += 2;
|
|
status = le16toh(*(uint16_t *)frm);
|
|
frm += 2;
|
|
if (status != 0) {
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
|
|
wh->i_addr2, "%sassoc failed (reason %d)",
|
|
ISREASSOC(subtype) ? "re" : "", status);
|
|
vap->iv_stats.is_rx_auth_fail++; /* XXX */
|
|
return;
|
|
}
|
|
associd = le16toh(*(uint16_t *)frm);
|
|
frm += 2;
|
|
|
|
rates = xrates = wme = htcap = htinfo = NULL;
|
|
while (efrm - frm > 1) {
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
|
|
switch (*frm) {
|
|
case IEEE80211_ELEMID_RATES:
|
|
rates = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_XRATES:
|
|
xrates = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_HTCAP:
|
|
htcap = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_HTINFO:
|
|
htinfo = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_VENDOR:
|
|
if (iswmeoui(frm))
|
|
wme = frm;
|
|
else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
|
|
/*
|
|
* Accept pre-draft HT ie's if the
|
|
* standard ones have not been seen.
|
|
*/
|
|
if (ishtcapoui(frm)) {
|
|
if (htcap == NULL)
|
|
htcap = frm;
|
|
} else if (ishtinfooui(frm)) {
|
|
if (htinfo == NULL)
|
|
htinfo = frm;
|
|
}
|
|
}
|
|
/* XXX Atheros OUI support */
|
|
break;
|
|
}
|
|
frm += frm[1] + 2;
|
|
}
|
|
|
|
IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
|
|
if (xrates != NULL)
|
|
IEEE80211_VERIFY_ELEMENT(xrates,
|
|
IEEE80211_RATE_MAXSIZE - rates[1], return);
|
|
rate = ieee80211_setup_rates(ni, rates, xrates,
|
|
IEEE80211_F_JOIN |
|
|
IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
|
|
IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
|
|
if (rate & IEEE80211_RATE_BASIC) {
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
|
|
wh->i_addr2,
|
|
"%sassoc failed (rate set mismatch)",
|
|
ISREASSOC(subtype) ? "re" : "");
|
|
vap->iv_stats.is_rx_assoc_norate++;
|
|
ieee80211_new_state(vap, IEEE80211_S_SCAN,
|
|
IEEE80211_SCAN_FAIL_STATUS);
|
|
return;
|
|
}
|
|
|
|
ni->ni_capinfo = capinfo;
|
|
ni->ni_associd = associd;
|
|
if (ni->ni_jointime == 0)
|
|
ni->ni_jointime = time_uptime;
|
|
if (wme != NULL &&
|
|
ieee80211_parse_wmeparams(vap, wme, wh) >= 0) {
|
|
ni->ni_flags |= IEEE80211_NODE_QOS;
|
|
ieee80211_wme_updateparams(vap);
|
|
} else
|
|
ni->ni_flags &= ~IEEE80211_NODE_QOS;
|
|
/*
|
|
* Setup HT state according to the negotiation.
|
|
*
|
|
* NB: shouldn't need to check if HT use is enabled but some
|
|
* ap's send back HT ie's even when we don't indicate we
|
|
* are HT capable in our AssocReq.
|
|
*/
|
|
if (htcap != NULL && htinfo != NULL &&
|
|
(vap->iv_flags_ht & IEEE80211_FHT_HT)) {
|
|
ieee80211_ht_node_init(ni);
|
|
ieee80211_ht_updateparams(ni, htcap, htinfo);
|
|
ieee80211_setup_htrates(ni, htcap,
|
|
IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
|
|
ieee80211_setup_basic_htrates(ni, htinfo);
|
|
ieee80211_node_setuptxparms(ni);
|
|
ieee80211_ratectl_node_init(ni);
|
|
} else {
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_ATH))
|
|
ieee80211_ff_node_init(ni);
|
|
#endif
|
|
}
|
|
/*
|
|
* Configure state now that we are associated.
|
|
*
|
|
* XXX may need different/additional driver callbacks?
|
|
*/
|
|
if (IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
|
|
(ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) {
|
|
ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
|
|
ic->ic_flags &= ~IEEE80211_F_USEBARKER;
|
|
} else {
|
|
ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
|
|
ic->ic_flags |= IEEE80211_F_USEBARKER;
|
|
}
|
|
ieee80211_set_shortslottime(ic,
|
|
IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
|
|
(ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME));
|
|
/*
|
|
* Honor ERP protection.
|
|
*
|
|
* NB: ni_erp should zero for non-11g operation.
|
|
*/
|
|
if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
|
|
(ni->ni_erp & IEEE80211_ERP_USE_PROTECTION))
|
|
ic->ic_flags |= IEEE80211_F_USEPROT;
|
|
else
|
|
ic->ic_flags &= ~IEEE80211_F_USEPROT;
|
|
IEEE80211_NOTE_MAC(vap,
|
|
IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2,
|
|
"%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
|
|
ISREASSOC(subtype) ? "re" : "",
|
|
IEEE80211_NODE_AID(ni),
|
|
ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
|
|
ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
|
|
ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "",
|
|
ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
|
|
ni->ni_flags & IEEE80211_NODE_HT ?
|
|
(ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
|
|
ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
|
|
ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
|
|
ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
|
|
ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
|
|
IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
|
|
", fast-frames" : "",
|
|
IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
|
|
", turbo" : ""
|
|
);
|
|
ieee80211_new_state(vap, IEEE80211_S_RUN, subtype);
|
|
break;
|
|
}
|
|
|
|
case IEEE80211_FC0_SUBTYPE_DEAUTH: {
|
|
uint16_t reason;
|
|
|
|
if (vap->iv_state == IEEE80211_S_SCAN) {
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
return;
|
|
}
|
|
if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
|
|
/* NB: can happen when in promiscuous mode */
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* deauth frame format
|
|
* [2] reason
|
|
*/
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
|
|
reason = le16toh(*(uint16_t *)frm);
|
|
|
|
vap->iv_stats.is_rx_deauth++;
|
|
vap->iv_stats.is_rx_deauth_code = reason;
|
|
IEEE80211_NODE_STAT(ni, rx_deauth);
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
|
|
"recv deauthenticate (reason %d)", reason);
|
|
ieee80211_new_state(vap, IEEE80211_S_AUTH,
|
|
(reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH);
|
|
break;
|
|
}
|
|
|
|
case IEEE80211_FC0_SUBTYPE_DISASSOC: {
|
|
uint16_t reason;
|
|
|
|
if (vap->iv_state != IEEE80211_S_RUN &&
|
|
vap->iv_state != IEEE80211_S_ASSOC &&
|
|
vap->iv_state != IEEE80211_S_AUTH) {
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
return;
|
|
}
|
|
if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
|
|
/* NB: can happen when in promiscuous mode */
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* disassoc frame format
|
|
* [2] reason
|
|
*/
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
|
|
reason = le16toh(*(uint16_t *)frm);
|
|
|
|
vap->iv_stats.is_rx_disassoc++;
|
|
vap->iv_stats.is_rx_disassoc_code = reason;
|
|
IEEE80211_NODE_STAT(ni, rx_disassoc);
|
|
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
|
|
"recv disassociate (reason %d)", reason);
|
|
ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
|
|
break;
|
|
}
|
|
|
|
case IEEE80211_FC0_SUBTYPE_ACTION:
|
|
case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
|
|
if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
|
|
!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, NULL, "%s", "not for us");
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
} else if (vap->iv_state != IEEE80211_S_RUN) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, NULL, "wrong state %s",
|
|
ieee80211_state_name[vap->iv_state]);
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
} else {
|
|
if (ieee80211_parse_action(ni, m0) == 0)
|
|
(void)ic->ic_recv_action(ni, wh, frm, efrm);
|
|
}
|
|
break;
|
|
|
|
case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
|
|
case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
|
|
case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
|
|
case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
|
|
case IEEE80211_FC0_SUBTYPE_ATIM:
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, NULL, "%s", "not handled");
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
break;
|
|
|
|
default:
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
|
|
wh, "mgt", "subtype 0x%x not handled", subtype);
|
|
vap->iv_stats.is_rx_badsubtype++;
|
|
break;
|
|
}
|
|
#undef ISREASSOC
|
|
#undef ISPROBE
|
|
}
|
|
|
|
static void
|
|
sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
|
|
{
|
|
switch (subtype) {
|
|
case IEEE80211_FC0_SUBTYPE_BAR:
|
|
ieee80211_recv_bar(ni, m);
|
|
break;
|
|
}
|
|
}
|