34baac6c87
Approved by: adrian (mentor) Differential Revision: https://reviews.freebsd.org/D4043
2323 lines
67 KiB
C
2323 lines
67 KiB
C
/*-
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* Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifdef __FreeBSD__
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__FBSDID("$FreeBSD$");
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#endif
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/*
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* IEEE 802.11 HOSTAP mode support.
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*/
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#include "opt_inet.h"
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#include "opt_wlan.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/endian.h>
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#include <sys/errno.h>
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#include <sys/proc.h>
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#include <sys/sysctl.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_media.h>
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#include <net/if_llc.h>
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#include <net/ethernet.h>
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#include <net/bpf.h>
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#include <net80211/ieee80211_var.h>
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#include <net80211/ieee80211_hostap.h>
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#include <net80211/ieee80211_input.h>
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#ifdef IEEE80211_SUPPORT_SUPERG
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#include <net80211/ieee80211_superg.h>
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#endif
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#include <net80211/ieee80211_wds.h>
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#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2)
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static void hostap_vattach(struct ieee80211vap *);
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static int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int);
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static int hostap_input(struct ieee80211_node *ni, struct mbuf *m,
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const struct ieee80211_rx_stats *,
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int rssi, int nf);
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static void hostap_deliver_data(struct ieee80211vap *,
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struct ieee80211_node *, struct mbuf *);
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static void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *,
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int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf);
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static void hostap_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
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void
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ieee80211_hostap_attach(struct ieee80211com *ic)
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{
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ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach;
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}
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void
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ieee80211_hostap_detach(struct ieee80211com *ic)
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{
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}
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static void
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hostap_vdetach(struct ieee80211vap *vap)
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{
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}
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static void
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hostap_vattach(struct ieee80211vap *vap)
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{
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vap->iv_newstate = hostap_newstate;
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vap->iv_input = hostap_input;
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vap->iv_recv_mgmt = hostap_recv_mgmt;
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vap->iv_recv_ctl = hostap_recv_ctl;
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vap->iv_opdetach = hostap_vdetach;
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vap->iv_deliver_data = hostap_deliver_data;
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vap->iv_recv_pspoll = ieee80211_recv_pspoll;
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}
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static void
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sta_disassoc(void *arg, struct ieee80211_node *ni)
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{
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struct ieee80211vap *vap = arg;
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if (ni->ni_vap == vap && ni->ni_associd != 0) {
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IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
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IEEE80211_REASON_ASSOC_LEAVE);
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ieee80211_node_leave(ni);
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}
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}
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static void
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sta_csa(void *arg, struct ieee80211_node *ni)
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{
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struct ieee80211vap *vap = arg;
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if (ni->ni_vap == vap && ni->ni_associd != 0)
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if (ni->ni_inact > vap->iv_inact_init) {
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ni->ni_inact = vap->iv_inact_init;
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IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
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"%s: inact %u", __func__, ni->ni_inact);
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}
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}
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static void
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sta_drop(void *arg, struct ieee80211_node *ni)
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{
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struct ieee80211vap *vap = arg;
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if (ni->ni_vap == vap && ni->ni_associd != 0)
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ieee80211_node_leave(ni);
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}
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/*
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* Does a channel change require associated stations to re-associate
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* so protocol state is correct. This is used when doing CSA across
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* bands or similar (e.g. HT -> legacy).
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*/
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static int
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isbandchange(struct ieee80211com *ic)
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{
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return ((ic->ic_bsschan->ic_flags ^ ic->ic_csa_newchan->ic_flags) &
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(IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_HALF |
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IEEE80211_CHAN_QUARTER | IEEE80211_CHAN_HT)) != 0;
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}
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/*
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* IEEE80211_M_HOSTAP vap state machine handler.
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*/
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static int
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hostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
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{
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struct ieee80211com *ic = vap->iv_ic;
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enum ieee80211_state ostate;
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IEEE80211_LOCK_ASSERT(ic);
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ostate = vap->iv_state;
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
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__func__, ieee80211_state_name[ostate],
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ieee80211_state_name[nstate], arg);
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vap->iv_state = nstate; /* state transition */
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if (ostate != IEEE80211_S_SCAN)
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ieee80211_cancel_scan(vap); /* background scan */
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switch (nstate) {
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case IEEE80211_S_INIT:
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switch (ostate) {
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case IEEE80211_S_SCAN:
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ieee80211_cancel_scan(vap);
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break;
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case IEEE80211_S_CAC:
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ieee80211_dfs_cac_stop(vap);
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break;
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case IEEE80211_S_RUN:
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ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap);
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break;
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default:
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break;
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}
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if (ostate != IEEE80211_S_INIT) {
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/* NB: optimize INIT -> INIT case */
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ieee80211_reset_bss(vap);
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}
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if (vap->iv_auth->ia_detach != NULL)
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vap->iv_auth->ia_detach(vap);
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break;
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case IEEE80211_S_SCAN:
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switch (ostate) {
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case IEEE80211_S_CSA:
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case IEEE80211_S_RUN:
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ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap);
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/*
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* Clear overlapping BSS state; the beacon frame
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* will be reconstructed on transition to the RUN
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* state and the timeout routines check if the flag
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* is set before doing anything so this is sufficient.
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*/
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ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
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ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
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/* fall thru... */
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case IEEE80211_S_CAC:
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/*
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* NB: We may get here because of a manual channel
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* change in which case we need to stop CAC
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* XXX no need to stop if ostate RUN but it's ok
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*/
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ieee80211_dfs_cac_stop(vap);
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/* fall thru... */
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case IEEE80211_S_INIT:
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if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
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!IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) {
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/*
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* Already have a channel; bypass the
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* scan and startup immediately.
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* ieee80211_create_ibss will call back to
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* move us to RUN state.
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*/
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ieee80211_create_ibss(vap, vap->iv_des_chan);
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break;
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}
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/*
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* Initiate a scan. We can come here as a result
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* of an IEEE80211_IOC_SCAN_REQ too in which case
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* the vap will be marked with IEEE80211_FEXT_SCANREQ
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* and the scan request parameters will be present
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* in iv_scanreq. Otherwise we do the default.
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*/
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if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
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ieee80211_check_scan(vap,
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vap->iv_scanreq_flags,
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vap->iv_scanreq_duration,
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vap->iv_scanreq_mindwell,
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vap->iv_scanreq_maxdwell,
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vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
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vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
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} else
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ieee80211_check_scan_current(vap);
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break;
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case IEEE80211_S_SCAN:
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/*
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* A state change requires a reset; scan.
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*/
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ieee80211_check_scan_current(vap);
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break;
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default:
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break;
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}
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break;
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case IEEE80211_S_CAC:
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/*
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* Start CAC on a DFS channel. We come here when starting
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* a bss on a DFS channel (see ieee80211_create_ibss).
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*/
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ieee80211_dfs_cac_start(vap);
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break;
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case IEEE80211_S_RUN:
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if (vap->iv_flags & IEEE80211_F_WPA) {
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/* XXX validate prerequisites */
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}
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switch (ostate) {
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case IEEE80211_S_INIT:
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/*
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* Already have a channel; bypass the
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* scan and startup immediately.
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* Note that ieee80211_create_ibss will call
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* back to do a RUN->RUN state change.
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*/
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ieee80211_create_ibss(vap,
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ieee80211_ht_adjust_channel(ic,
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ic->ic_curchan, vap->iv_flags_ht));
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/* NB: iv_bss is changed on return */
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break;
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case IEEE80211_S_CAC:
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/*
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* NB: This is the normal state change when CAC
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* expires and no radar was detected; no need to
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* clear the CAC timer as it's already expired.
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*/
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/* fall thru... */
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case IEEE80211_S_CSA:
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/*
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* Shorten inactivity timer of associated stations
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* to weed out sta's that don't follow a CSA.
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*/
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ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
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/*
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* Update bss node channel to reflect where
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* we landed after CSA.
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*/
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ieee80211_node_set_chan(vap->iv_bss,
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ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
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ieee80211_htchanflags(vap->iv_bss->ni_chan)));
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/* XXX bypass debug msgs */
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break;
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case IEEE80211_S_SCAN:
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case IEEE80211_S_RUN:
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#ifdef IEEE80211_DEBUG
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if (ieee80211_msg_debug(vap)) {
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struct ieee80211_node *ni = vap->iv_bss;
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ieee80211_note(vap,
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"synchronized with %s ssid ",
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ether_sprintf(ni->ni_bssid));
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ieee80211_print_essid(ni->ni_essid,
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ni->ni_esslen);
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/* XXX MCS/HT */
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printf(" channel %d start %uMb\n",
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ieee80211_chan2ieee(ic, ic->ic_curchan),
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IEEE80211_RATE2MBS(ni->ni_txrate));
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}
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#endif
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break;
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default:
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break;
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}
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/*
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* Start/stop the authenticator. We delay until here
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* to allow configuration to happen out of order.
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*/
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if (vap->iv_auth->ia_attach != NULL) {
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/* XXX check failure */
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vap->iv_auth->ia_attach(vap);
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} else if (vap->iv_auth->ia_detach != NULL) {
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vap->iv_auth->ia_detach(vap);
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}
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ieee80211_node_authorize(vap->iv_bss);
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break;
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case IEEE80211_S_CSA:
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if (ostate == IEEE80211_S_RUN && isbandchange(ic)) {
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/*
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* On a ``band change'' silently drop associated
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* stations as they must re-associate before they
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* can pass traffic (as otherwise protocol state
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* such as capabilities and the negotiated rate
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* set may/will be wrong).
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*/
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ieee80211_iterate_nodes(&ic->ic_sta, sta_drop, vap);
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}
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break;
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default:
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break;
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}
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return 0;
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}
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static void
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hostap_deliver_data(struct ieee80211vap *vap,
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struct ieee80211_node *ni, struct mbuf *m)
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{
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struct ether_header *eh = mtod(m, struct ether_header *);
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struct ifnet *ifp = vap->iv_ifp;
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/* clear driver/net80211 flags before passing up */
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m->m_flags &= ~(M_MCAST | M_BCAST);
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m_clrprotoflags(m);
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KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP,
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("gack, opmode %d", vap->iv_opmode));
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/*
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* Do accounting.
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*/
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if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
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IEEE80211_NODE_STAT(ni, rx_data);
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IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
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if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
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m->m_flags |= M_MCAST; /* XXX M_BCAST? */
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IEEE80211_NODE_STAT(ni, rx_mcast);
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} else
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IEEE80211_NODE_STAT(ni, rx_ucast);
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/* perform as a bridge within the AP */
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if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) {
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struct mbuf *mcopy = NULL;
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if (m->m_flags & M_MCAST) {
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mcopy = m_dup(m, M_NOWAIT);
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if (mcopy == NULL)
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if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
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else
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mcopy->m_flags |= M_MCAST;
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} else {
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/*
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* Check if the destination is associated with the
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* same vap and authorized to receive traffic.
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* Beware of traffic destined for the vap itself;
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* sending it will not work; just let it be delivered
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* normally.
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*/
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struct ieee80211_node *sta = ieee80211_find_vap_node(
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&vap->iv_ic->ic_sta, vap, eh->ether_dhost);
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if (sta != NULL) {
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if (ieee80211_node_is_authorized(sta)) {
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/*
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* Beware of sending to ourself; this
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* needs to happen via the normal
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* input path.
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*/
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if (sta != vap->iv_bss) {
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mcopy = m;
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m = NULL;
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}
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} else {
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vap->iv_stats.is_rx_unauth++;
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IEEE80211_NODE_STAT(sta, rx_unauth);
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}
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ieee80211_free_node(sta);
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}
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}
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if (mcopy != NULL) {
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int len, err;
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len = mcopy->m_pkthdr.len;
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err = ieee80211_vap_xmitpkt(vap, mcopy);
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if (err) {
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/* NB: IFQ_HANDOFF reclaims mcopy */
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} else {
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if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1);
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}
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}
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}
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if (m != NULL) {
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/*
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* Mark frame as coming from vap's interface.
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*/
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m->m_pkthdr.rcvif = ifp;
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if (m->m_flags & M_MCAST) {
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/*
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* Spam DWDS vap's w/ multicast traffic.
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*/
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/* XXX only if dwds in use? */
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ieee80211_dwds_mcast(vap, m);
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}
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if (ni->ni_vlan != 0) {
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/* attach vlan tag */
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m->m_pkthdr.ether_vtag = ni->ni_vlan;
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m->m_flags |= M_VLANTAG;
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}
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ifp->if_input(ifp, m);
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}
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}
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|
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/*
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* Decide if a received management frame should be
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* printed when debugging is enabled. This filters some
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* of the less interesting frames that come frequently
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* (e.g. beacons).
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*/
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static __inline int
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doprint(struct ieee80211vap *vap, int subtype)
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{
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switch (subtype) {
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case IEEE80211_FC0_SUBTYPE_BEACON:
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return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
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case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
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return 0;
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}
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return 1;
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}
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|
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/*
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* Process a received frame. The node associated with the sender
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* should be supplied. If nothing was found in the node table then
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* the caller is assumed to supply a reference to iv_bss instead.
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* The RSSI and a timestamp are also supplied. The RSSI data is used
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* during AP scanning to select a AP to associate with; it can have
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* any units so long as values have consistent units and higher values
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* mean ``better signal''. The receive timestamp is currently not used
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* by the 802.11 layer.
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*/
|
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static int
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hostap_input(struct ieee80211_node *ni, struct mbuf *m,
|
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const struct ieee80211_rx_stats *rxs, int rssi, int nf)
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{
|
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struct ieee80211vap *vap = ni->ni_vap;
|
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struct ieee80211com *ic = ni->ni_ic;
|
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struct ifnet *ifp = vap->iv_ifp;
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struct ieee80211_frame *wh;
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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) {
|
|
if (dir != IEEE80211_FC1_DIR_NODS)
|
|
bssid = wh->i_addr1;
|
|
else if (type == IEEE80211_FC0_TYPE_CTL)
|
|
bssid = wh->i_addr1;
|
|
else {
|
|
if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
|
|
IEEE80211_DISCARD_MAC(vap,
|
|
IEEE80211_MSG_ANY, ni->ni_macaddr,
|
|
NULL, "too short (2): len %u",
|
|
m->m_pkthdr.len);
|
|
vap->iv_stats.is_rx_tooshort++;
|
|
goto out;
|
|
}
|
|
bssid = wh->i_addr3;
|
|
}
|
|
/*
|
|
* Validate the bssid.
|
|
*/
|
|
if (!(type == IEEE80211_FC0_TYPE_MGT &&
|
|
subtype == IEEE80211_FC0_SUBTYPE_BEACON) &&
|
|
!IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) &&
|
|
!IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) {
|
|
/* not interested in */
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
|
|
bssid, NULL, "%s", "not to bss");
|
|
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)) {
|
|
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 */
|
|
}
|
|
if (!(dir == IEEE80211_FC1_DIR_TODS ||
|
|
(dir == IEEE80211_FC1_DIR_DSTODS &&
|
|
(vap->iv_flags & IEEE80211_F_DWDS)))) {
|
|
if (dir != IEEE80211_FC1_DIR_DSTODS) {
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_INPUT, wh, "data",
|
|
"incorrect dir 0x%x", dir);
|
|
} else {
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_INPUT |
|
|
IEEE80211_MSG_WDS, wh,
|
|
"4-address data",
|
|
"%s", "DWDS not enabled");
|
|
}
|
|
vap->iv_stats.is_rx_wrongdir++;
|
|
goto out;
|
|
}
|
|
/* check if source STA is associated */
|
|
if (ni == vap->iv_bss) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, "data", "%s", "unknown src");
|
|
ieee80211_send_error(ni, wh->i_addr2,
|
|
IEEE80211_FC0_SUBTYPE_DEAUTH,
|
|
IEEE80211_REASON_NOT_AUTHED);
|
|
vap->iv_stats.is_rx_notassoc++;
|
|
goto err;
|
|
}
|
|
if (ni->ni_associd == 0) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, "data", "%s", "unassoc src");
|
|
IEEE80211_SEND_MGMT(ni,
|
|
IEEE80211_FC0_SUBTYPE_DISASSOC,
|
|
IEEE80211_REASON_NOT_ASSOCED);
|
|
vap->iv_stats.is_rx_notassoc++;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Check for power save state change.
|
|
* XXX out-of-order A-MPDU frames?
|
|
*/
|
|
if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^
|
|
(ni->ni_flags & IEEE80211_NODE_PWR_MGT)))
|
|
vap->iv_node_ps(ni,
|
|
wh->i_fc[1] & IEEE80211_FC1_PWR_MGT);
|
|
/*
|
|
* For 4-address packets handle WDS discovery
|
|
* notifications. Once a WDS link is setup frames
|
|
* are just delivered to the WDS vap (see below).
|
|
*/
|
|
if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) {
|
|
if (!ieee80211_node_is_authorized(ni)) {
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_INPUT |
|
|
IEEE80211_MSG_WDS, wh,
|
|
"4-address data",
|
|
"%s", "unauthorized port");
|
|
vap->iv_stats.is_rx_unauth++;
|
|
IEEE80211_NODE_STAT(ni, rx_unauth);
|
|
goto err;
|
|
}
|
|
ieee80211_dwds_discover(ni, m);
|
|
return type;
|
|
}
|
|
|
|
/*
|
|
* 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) &&
|
|
ieee80211_ampdu_reorder(ni, m) != 0) {
|
|
m = NULL;
|
|
goto out;
|
|
}
|
|
resubmit_ampdu:
|
|
|
|
/*
|
|
* 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
|
|
}
|
|
if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL)
|
|
ieee80211_deliver_data(ni->ni_wdsvap, ni, m);
|
|
else
|
|
hostap_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, "mgt", "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;
|
|
}
|
|
if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
|
|
/* ensure return frames are unicast */
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
|
|
wh, NULL, "source is multicast: %s",
|
|
ether_sprintf(wh->i_addr2));
|
|
vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */
|
|
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, NULL,
|
|
"%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, NULL, "%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;
|
|
}
|
|
/*
|
|
* Pass the packet to radiotap before calling iv_recv_mgmt().
|
|
* Otherwise iv_recv_mgmt() might pass another packet to
|
|
* radiotap, resulting in out of order packet captures.
|
|
*/
|
|
if (ieee80211_radiotap_active_vap(vap))
|
|
ieee80211_radiotap_rx(vap, m);
|
|
need_tap = 0;
|
|
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, "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
|
|
hostap_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;
|
|
|
|
KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
|
|
|
|
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 */
|
|
/*
|
|
* Clear any challenge text that may be there if
|
|
* a previous shared key auth failed and then an
|
|
* open auth is attempted.
|
|
*/
|
|
if (ni->ni_challenge != NULL) {
|
|
IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
|
|
ni->ni_challenge = NULL;
|
|
}
|
|
/* XXX hack to workaround calling convention */
|
|
ieee80211_send_error(ni, wh->i_addr2,
|
|
IEEE80211_FC0_SUBTYPE_AUTH,
|
|
(seq + 1) | (IEEE80211_STATUS_ALG<<16));
|
|
return;
|
|
}
|
|
if (seq != IEEE80211_AUTH_OPEN_REQUEST) {
|
|
vap->iv_stats.is_rx_bad_auth++;
|
|
return;
|
|
}
|
|
/* always accept open authentication requests */
|
|
if (ni == vap->iv_bss) {
|
|
ni = ieee80211_dup_bss(vap, wh->i_addr2);
|
|
if (ni == NULL)
|
|
return;
|
|
} else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
|
|
(void) ieee80211_ref_node(ni);
|
|
/*
|
|
* Mark the node as referenced to reflect that it's
|
|
* reference count has been bumped to insure it remains
|
|
* after the transaction completes.
|
|
*/
|
|
ni->ni_flags |= IEEE80211_NODE_AREF;
|
|
/*
|
|
* Mark the node as requiring a valid association id
|
|
* before outbound traffic is permitted.
|
|
*/
|
|
ni->ni_flags |= IEEE80211_NODE_ASSOCID;
|
|
|
|
if (vap->iv_acl != NULL &&
|
|
vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
|
|
/*
|
|
* When the ACL policy is set to RADIUS we defer the
|
|
* authorization to a user agent. Dispatch an event,
|
|
* a subsequent MLME call will decide the fate of the
|
|
* station. If the user agent is not present then the
|
|
* node will be reclaimed due to inactivity.
|
|
*/
|
|
IEEE80211_NOTE_MAC(vap,
|
|
IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr,
|
|
"%s", "station authentication defered (radius acl)");
|
|
ieee80211_notify_node_auth(ni);
|
|
} else {
|
|
IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
|
|
IEEE80211_NOTE_MAC(vap,
|
|
IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr,
|
|
"%s", "station authenticated (open)");
|
|
/*
|
|
* 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);
|
|
}
|
|
}
|
|
|
|
static void
|
|
hostap_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 allocbs, estatus;
|
|
|
|
KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
|
|
|
|
/*
|
|
* 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 Mac 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;
|
|
}
|
|
switch (seq) {
|
|
case IEEE80211_AUTH_SHARED_REQUEST:
|
|
if (ni == vap->iv_bss) {
|
|
ni = ieee80211_dup_bss(vap, wh->i_addr2);
|
|
if (ni == NULL) {
|
|
/* NB: no way to return an error */
|
|
return;
|
|
}
|
|
allocbs = 1;
|
|
} else {
|
|
if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
|
|
(void) ieee80211_ref_node(ni);
|
|
allocbs = 0;
|
|
}
|
|
/*
|
|
* Mark the node as referenced to reflect that it's
|
|
* reference count has been bumped to insure it remains
|
|
* after the transaction completes.
|
|
*/
|
|
ni->ni_flags |= IEEE80211_NODE_AREF;
|
|
/*
|
|
* Mark the node as requiring a valid associatio id
|
|
* before outbound traffic is permitted.
|
|
*/
|
|
ni->ni_flags |= IEEE80211_NODE_ASSOCID;
|
|
IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
|
|
ni->ni_noise = nf;
|
|
if (!ieee80211_alloc_challenge(ni)) {
|
|
/* NB: don't return error so they rexmit */
|
|
return;
|
|
}
|
|
get_random_bytes(ni->ni_challenge,
|
|
IEEE80211_CHALLENGE_LEN);
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
|
|
ni, "shared key %sauth request", allocbs ? "" : "re");
|
|
/*
|
|
* When the ACL policy is set to RADIUS we defer the
|
|
* authorization to a user agent. Dispatch an event,
|
|
* a subsequent MLME call will decide the fate of the
|
|
* station. If the user agent is not present then the
|
|
* node will be reclaimed due to inactivity.
|
|
*/
|
|
if (vap->iv_acl != NULL &&
|
|
vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
|
|
IEEE80211_NOTE_MAC(vap,
|
|
IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL,
|
|
ni->ni_macaddr,
|
|
"%s", "station authentication defered (radius acl)");
|
|
ieee80211_notify_node_auth(ni);
|
|
return;
|
|
}
|
|
break;
|
|
case IEEE80211_AUTH_SHARED_RESPONSE:
|
|
if (ni == vap->iv_bss) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
|
|
ni->ni_macaddr, "shared key response",
|
|
"%s", "unknown station");
|
|
/* NB: don't send a response */
|
|
return;
|
|
}
|
|
if (ni->ni_challenge == NULL) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
|
|
ni->ni_macaddr, "shared key response",
|
|
"%s", "no challenge recorded");
|
|
vap->iv_stats.is_rx_bad_auth++;
|
|
estatus = IEEE80211_STATUS_CHALLENGE;
|
|
goto bad;
|
|
}
|
|
if (memcmp(ni->ni_challenge, &challenge[2],
|
|
challenge[1]) != 0) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
|
|
ni->ni_macaddr, "shared key response",
|
|
"%s", "challenge mismatch");
|
|
vap->iv_stats.is_rx_auth_fail++;
|
|
estatus = IEEE80211_STATUS_CHALLENGE;
|
|
goto bad;
|
|
}
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
|
|
ni, "%s", "station authenticated (shared key)");
|
|
ieee80211_node_authorize(ni);
|
|
break;
|
|
default:
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
|
|
ni->ni_macaddr, "shared key auth",
|
|
"bad seq %d", seq);
|
|
vap->iv_stats.is_rx_bad_auth++;
|
|
estatus = IEEE80211_STATUS_SEQUENCE;
|
|
goto bad;
|
|
}
|
|
IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
|
|
return;
|
|
bad:
|
|
/*
|
|
* Send an error response; but only when operating as an AP.
|
|
*/
|
|
/* XXX hack to workaround calling convention */
|
|
ieee80211_send_error(ni, wh->i_addr2,
|
|
IEEE80211_FC0_SUBTYPE_AUTH,
|
|
(seq + 1) | (estatus<<16));
|
|
}
|
|
|
|
/*
|
|
* Convert a WPA cipher selector OUI to an internal
|
|
* cipher algorithm. Where appropriate we also
|
|
* record any key length.
|
|
*/
|
|
static int
|
|
wpa_cipher(const uint8_t *sel, uint8_t *keylen)
|
|
{
|
|
#define WPA_SEL(x) (((x)<<24)|WPA_OUI)
|
|
uint32_t w = LE_READ_4(sel);
|
|
|
|
switch (w) {
|
|
case WPA_SEL(WPA_CSE_NULL):
|
|
return IEEE80211_CIPHER_NONE;
|
|
case WPA_SEL(WPA_CSE_WEP40):
|
|
if (keylen)
|
|
*keylen = 40 / NBBY;
|
|
return IEEE80211_CIPHER_WEP;
|
|
case WPA_SEL(WPA_CSE_WEP104):
|
|
if (keylen)
|
|
*keylen = 104 / NBBY;
|
|
return IEEE80211_CIPHER_WEP;
|
|
case WPA_SEL(WPA_CSE_TKIP):
|
|
return IEEE80211_CIPHER_TKIP;
|
|
case WPA_SEL(WPA_CSE_CCMP):
|
|
return IEEE80211_CIPHER_AES_CCM;
|
|
}
|
|
return 32; /* NB: so 1<< is discarded */
|
|
#undef WPA_SEL
|
|
}
|
|
|
|
/*
|
|
* Convert a WPA key management/authentication algorithm
|
|
* to an internal code.
|
|
*/
|
|
static int
|
|
wpa_keymgmt(const uint8_t *sel)
|
|
{
|
|
#define WPA_SEL(x) (((x)<<24)|WPA_OUI)
|
|
uint32_t w = LE_READ_4(sel);
|
|
|
|
switch (w) {
|
|
case WPA_SEL(WPA_ASE_8021X_UNSPEC):
|
|
return WPA_ASE_8021X_UNSPEC;
|
|
case WPA_SEL(WPA_ASE_8021X_PSK):
|
|
return WPA_ASE_8021X_PSK;
|
|
case WPA_SEL(WPA_ASE_NONE):
|
|
return WPA_ASE_NONE;
|
|
}
|
|
return 0; /* NB: so is discarded */
|
|
#undef WPA_SEL
|
|
}
|
|
|
|
/*
|
|
* Parse a WPA information element to collect parameters.
|
|
* Note that we do not validate security parameters; that
|
|
* is handled by the authenticator; the parsing done here
|
|
* is just for internal use in making operational decisions.
|
|
*/
|
|
static int
|
|
ieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm,
|
|
struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
|
|
{
|
|
uint8_t len = frm[1];
|
|
uint32_t w;
|
|
int n;
|
|
|
|
/*
|
|
* Check the length once for fixed parts: OUI, type,
|
|
* version, mcast cipher, and 2 selector counts.
|
|
* Other, variable-length data, must be checked separately.
|
|
*/
|
|
if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) {
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
|
|
wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags);
|
|
return IEEE80211_REASON_IE_INVALID;
|
|
}
|
|
if (len < 14) {
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
|
|
wh, "WPA", "too short, len %u", len);
|
|
return IEEE80211_REASON_IE_INVALID;
|
|
}
|
|
frm += 6, len -= 4; /* NB: len is payload only */
|
|
/* NB: iswpaoui already validated the OUI and type */
|
|
w = LE_READ_2(frm);
|
|
if (w != WPA_VERSION) {
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
|
|
wh, "WPA", "bad version %u", w);
|
|
return IEEE80211_REASON_IE_INVALID;
|
|
}
|
|
frm += 2, len -= 2;
|
|
|
|
memset(rsn, 0, sizeof(*rsn));
|
|
|
|
/* multicast/group cipher */
|
|
rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen);
|
|
frm += 4, len -= 4;
|
|
|
|
/* unicast ciphers */
|
|
n = LE_READ_2(frm);
|
|
frm += 2, len -= 2;
|
|
if (len < n*4+2) {
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
|
|
wh, "WPA", "ucast cipher data too short; len %u, n %u",
|
|
len, n);
|
|
return IEEE80211_REASON_IE_INVALID;
|
|
}
|
|
w = 0;
|
|
for (; n > 0; n--) {
|
|
w |= 1<<wpa_cipher(frm, &rsn->rsn_ucastkeylen);
|
|
frm += 4, len -= 4;
|
|
}
|
|
if (w & (1<<IEEE80211_CIPHER_TKIP))
|
|
rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
|
|
else
|
|
rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
|
|
|
|
/* key management algorithms */
|
|
n = LE_READ_2(frm);
|
|
frm += 2, len -= 2;
|
|
if (len < n*4) {
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
|
|
wh, "WPA", "key mgmt alg data too short; len %u, n %u",
|
|
len, n);
|
|
return IEEE80211_REASON_IE_INVALID;
|
|
}
|
|
w = 0;
|
|
for (; n > 0; n--) {
|
|
w |= wpa_keymgmt(frm);
|
|
frm += 4, len -= 4;
|
|
}
|
|
if (w & WPA_ASE_8021X_UNSPEC)
|
|
rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC;
|
|
else
|
|
rsn->rsn_keymgmt = WPA_ASE_8021X_PSK;
|
|
|
|
if (len > 2) /* optional capabilities */
|
|
rsn->rsn_caps = LE_READ_2(frm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Convert an RSN cipher selector OUI to an internal
|
|
* cipher algorithm. Where appropriate we also
|
|
* record any key length.
|
|
*/
|
|
static int
|
|
rsn_cipher(const uint8_t *sel, uint8_t *keylen)
|
|
{
|
|
#define RSN_SEL(x) (((x)<<24)|RSN_OUI)
|
|
uint32_t w = LE_READ_4(sel);
|
|
|
|
switch (w) {
|
|
case RSN_SEL(RSN_CSE_NULL):
|
|
return IEEE80211_CIPHER_NONE;
|
|
case RSN_SEL(RSN_CSE_WEP40):
|
|
if (keylen)
|
|
*keylen = 40 / NBBY;
|
|
return IEEE80211_CIPHER_WEP;
|
|
case RSN_SEL(RSN_CSE_WEP104):
|
|
if (keylen)
|
|
*keylen = 104 / NBBY;
|
|
return IEEE80211_CIPHER_WEP;
|
|
case RSN_SEL(RSN_CSE_TKIP):
|
|
return IEEE80211_CIPHER_TKIP;
|
|
case RSN_SEL(RSN_CSE_CCMP):
|
|
return IEEE80211_CIPHER_AES_CCM;
|
|
case RSN_SEL(RSN_CSE_WRAP):
|
|
return IEEE80211_CIPHER_AES_OCB;
|
|
}
|
|
return 32; /* NB: so 1<< is discarded */
|
|
#undef WPA_SEL
|
|
}
|
|
|
|
/*
|
|
* Convert an RSN key management/authentication algorithm
|
|
* to an internal code.
|
|
*/
|
|
static int
|
|
rsn_keymgmt(const uint8_t *sel)
|
|
{
|
|
#define RSN_SEL(x) (((x)<<24)|RSN_OUI)
|
|
uint32_t w = LE_READ_4(sel);
|
|
|
|
switch (w) {
|
|
case RSN_SEL(RSN_ASE_8021X_UNSPEC):
|
|
return RSN_ASE_8021X_UNSPEC;
|
|
case RSN_SEL(RSN_ASE_8021X_PSK):
|
|
return RSN_ASE_8021X_PSK;
|
|
case RSN_SEL(RSN_ASE_NONE):
|
|
return RSN_ASE_NONE;
|
|
}
|
|
return 0; /* NB: so is discarded */
|
|
#undef RSN_SEL
|
|
}
|
|
|
|
/*
|
|
* Parse a WPA/RSN information element to collect parameters
|
|
* and validate the parameters against what has been
|
|
* configured for the system.
|
|
*/
|
|
static int
|
|
ieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm,
|
|
struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
|
|
{
|
|
uint8_t len = frm[1];
|
|
uint32_t w;
|
|
int n;
|
|
|
|
/*
|
|
* Check the length once for fixed parts:
|
|
* version, mcast cipher, and 2 selector counts.
|
|
* Other, variable-length data, must be checked separately.
|
|
*/
|
|
if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) {
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
|
|
wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags);
|
|
return IEEE80211_REASON_IE_INVALID;
|
|
}
|
|
if (len < 10) {
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
|
|
wh, "RSN", "too short, len %u", len);
|
|
return IEEE80211_REASON_IE_INVALID;
|
|
}
|
|
frm += 2;
|
|
w = LE_READ_2(frm);
|
|
if (w != RSN_VERSION) {
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
|
|
wh, "RSN", "bad version %u", w);
|
|
return IEEE80211_REASON_IE_INVALID;
|
|
}
|
|
frm += 2, len -= 2;
|
|
|
|
memset(rsn, 0, sizeof(*rsn));
|
|
|
|
/* multicast/group cipher */
|
|
rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen);
|
|
frm += 4, len -= 4;
|
|
|
|
/* unicast ciphers */
|
|
n = LE_READ_2(frm);
|
|
frm += 2, len -= 2;
|
|
if (len < n*4+2) {
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
|
|
wh, "RSN", "ucast cipher data too short; len %u, n %u",
|
|
len, n);
|
|
return IEEE80211_REASON_IE_INVALID;
|
|
}
|
|
w = 0;
|
|
for (; n > 0; n--) {
|
|
w |= 1<<rsn_cipher(frm, &rsn->rsn_ucastkeylen);
|
|
frm += 4, len -= 4;
|
|
}
|
|
if (w & (1<<IEEE80211_CIPHER_TKIP))
|
|
rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
|
|
else
|
|
rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
|
|
|
|
/* key management algorithms */
|
|
n = LE_READ_2(frm);
|
|
frm += 2, len -= 2;
|
|
if (len < n*4) {
|
|
IEEE80211_DISCARD_IE(vap,
|
|
IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
|
|
wh, "RSN", "key mgmt alg data too short; len %u, n %u",
|
|
len, n);
|
|
return IEEE80211_REASON_IE_INVALID;
|
|
}
|
|
w = 0;
|
|
for (; n > 0; n--) {
|
|
w |= rsn_keymgmt(frm);
|
|
frm += 4, len -= 4;
|
|
}
|
|
if (w & RSN_ASE_8021X_UNSPEC)
|
|
rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC;
|
|
else
|
|
rsn->rsn_keymgmt = RSN_ASE_8021X_PSK;
|
|
|
|
/* optional RSN capabilities */
|
|
if (len > 2)
|
|
rsn->rsn_caps = LE_READ_2(frm);
|
|
/* XXXPMKID */
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* WPA/802.11i assocation request processing.
|
|
*/
|
|
static int
|
|
wpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms,
|
|
const struct ieee80211_frame *wh, const uint8_t *wpa,
|
|
const uint8_t *rsn, uint16_t capinfo)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
uint8_t reason;
|
|
int badwparsn;
|
|
|
|
ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN);
|
|
if (wpa == NULL && rsn == NULL) {
|
|
if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) {
|
|
/*
|
|
* W-Fi Protected Setup (WPS) permits
|
|
* clients to associate and pass EAPOL frames
|
|
* to establish initial credentials.
|
|
*/
|
|
ni->ni_flags |= IEEE80211_NODE_WPS;
|
|
return 1;
|
|
}
|
|
if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) &&
|
|
(capinfo & IEEE80211_CAPINFO_PRIVACY)) {
|
|
/*
|
|
* Transitional Security Network. Permits clients
|
|
* to associate and use WEP while WPA is configured.
|
|
*/
|
|
ni->ni_flags |= IEEE80211_NODE_TSN;
|
|
return 1;
|
|
}
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
|
|
wh, NULL, "%s", "no WPA/RSN IE in association request");
|
|
vap->iv_stats.is_rx_assoc_badwpaie++;
|
|
reason = IEEE80211_REASON_IE_INVALID;
|
|
goto bad;
|
|
}
|
|
/* assert right association security credentials */
|
|
badwparsn = 0; /* NB: to silence compiler */
|
|
switch (vap->iv_flags & IEEE80211_F_WPA) {
|
|
case IEEE80211_F_WPA1:
|
|
badwparsn = (wpa == NULL);
|
|
break;
|
|
case IEEE80211_F_WPA2:
|
|
badwparsn = (rsn == NULL);
|
|
break;
|
|
case IEEE80211_F_WPA1|IEEE80211_F_WPA2:
|
|
badwparsn = (wpa == NULL && rsn == NULL);
|
|
break;
|
|
}
|
|
if (badwparsn) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
|
|
wh, NULL,
|
|
"%s", "missing WPA/RSN IE in association request");
|
|
vap->iv_stats.is_rx_assoc_badwpaie++;
|
|
reason = IEEE80211_REASON_IE_INVALID;
|
|
goto bad;
|
|
}
|
|
/*
|
|
* Parse WPA/RSN information element.
|
|
*/
|
|
if (wpa != NULL)
|
|
reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh);
|
|
else
|
|
reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh);
|
|
if (reason != 0) {
|
|
/* XXX distinguish WPA/RSN? */
|
|
vap->iv_stats.is_rx_assoc_badwpaie++;
|
|
goto bad;
|
|
}
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni,
|
|
"%s ie: mc %u/%u uc %u/%u key %u caps 0x%x",
|
|
wpa != NULL ? "WPA" : "RSN",
|
|
rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen,
|
|
rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen,
|
|
rsnparms->rsn_keymgmt, rsnparms->rsn_caps);
|
|
|
|
return 1;
|
|
bad:
|
|
ieee80211_node_deauth(ni, reason);
|
|
return 0;
|
|
}
|
|
|
|
/* XXX find a better place for definition */
|
|
struct l2_update_frame {
|
|
struct ether_header eh;
|
|
uint8_t dsap;
|
|
uint8_t ssap;
|
|
uint8_t control;
|
|
uint8_t xid[3];
|
|
} __packed;
|
|
|
|
/*
|
|
* Deliver a TGf L2UF frame on behalf of a station.
|
|
* This primes any bridge when the station is roaming
|
|
* between ap's on the same wired network.
|
|
*/
|
|
static void
|
|
ieee80211_deliver_l2uf(struct ieee80211_node *ni)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ifnet *ifp = vap->iv_ifp;
|
|
struct mbuf *m;
|
|
struct l2_update_frame *l2uf;
|
|
struct ether_header *eh;
|
|
|
|
m = m_gethdr(M_NOWAIT, MT_DATA);
|
|
if (m == NULL) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
|
|
"%s", "no mbuf for l2uf frame");
|
|
vap->iv_stats.is_rx_nobuf++; /* XXX not right */
|
|
return;
|
|
}
|
|
l2uf = mtod(m, struct l2_update_frame *);
|
|
eh = &l2uf->eh;
|
|
/* dst: Broadcast address */
|
|
IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr);
|
|
/* src: associated STA */
|
|
IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr);
|
|
eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh));
|
|
|
|
l2uf->dsap = 0;
|
|
l2uf->ssap = 0;
|
|
l2uf->control = 0xf5;
|
|
l2uf->xid[0] = 0x81;
|
|
l2uf->xid[1] = 0x80;
|
|
l2uf->xid[2] = 0x00;
|
|
|
|
m->m_pkthdr.len = m->m_len = sizeof(*l2uf);
|
|
hostap_deliver_data(vap, ni, m);
|
|
}
|
|
|
|
static void
|
|
ratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
|
|
int reassoc, int resp, const char *tag, int rate)
|
|
{
|
|
IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
|
|
"deny %s request, %s rate set mismatch, rate/MCS %d",
|
|
reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL);
|
|
IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE);
|
|
ieee80211_node_leave(ni);
|
|
}
|
|
|
|
static void
|
|
capinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
|
|
int reassoc, int resp, const char *tag, int capinfo)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
|
|
"deny %s request, %s mismatch 0x%x",
|
|
reassoc ? "reassoc" : "assoc", tag, capinfo);
|
|
IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO);
|
|
ieee80211_node_leave(ni);
|
|
vap->iv_stats.is_rx_assoc_capmismatch++;
|
|
}
|
|
|
|
static void
|
|
htcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
|
|
int reassoc, int resp)
|
|
{
|
|
IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
|
|
"deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc");
|
|
/* XXX no better code */
|
|
IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_MISSING_HT_CAPS);
|
|
ieee80211_node_leave(ni);
|
|
}
|
|
|
|
static void
|
|
authalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
|
|
int algo, int seq, int status)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
|
|
wh, NULL, "unsupported alg %d", algo);
|
|
vap->iv_stats.is_rx_auth_unsupported++;
|
|
ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH,
|
|
seq | (status << 16));
|
|
}
|
|
|
|
static __inline int
|
|
ishtmixed(const uint8_t *ie)
|
|
{
|
|
const struct ieee80211_ie_htinfo *ht =
|
|
(const struct ieee80211_ie_htinfo *) ie;
|
|
return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) ==
|
|
IEEE80211_HTINFO_OPMODE_MIXED;
|
|
}
|
|
|
|
static int
|
|
is11bclient(const uint8_t *rates, const uint8_t *xrates)
|
|
{
|
|
static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11);
|
|
int i;
|
|
|
|
/* NB: the 11b clients we care about will not have xrates */
|
|
if (xrates != NULL || rates == NULL)
|
|
return 0;
|
|
for (i = 0; i < rates[1]; i++) {
|
|
int r = rates[2+i] & IEEE80211_RATE_VAL;
|
|
if (r > 2*11 || ((1<<r) & brates) == 0)
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
hostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
|
|
int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
struct ieee80211_frame *wh;
|
|
uint8_t *frm, *efrm, *sfrm;
|
|
uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap;
|
|
int reassoc, resp;
|
|
uint8_t rate;
|
|
|
|
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;
|
|
/*
|
|
* We process beacon/probe response frames when scanning;
|
|
* otherwise we check beacon frames for overlapping non-ERP
|
|
* BSS in 11g and/or overlapping legacy BSS when in HT.
|
|
*/
|
|
if ((ic->ic_flags & IEEE80211_F_SCAN) == 0 &&
|
|
subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) {
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
return;
|
|
}
|
|
/* NB: accept off-channel frames */
|
|
/* XXX TODO: use rxstatus to determine off-channel details */
|
|
if (ieee80211_parse_beacon(ni, m0, ic->ic_curchan, &scan) &~ IEEE80211_BPARSE_OFFCHAN)
|
|
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);
|
|
/*
|
|
* If scanning, just pass information to the scan module.
|
|
*/
|
|
if (ic->ic_flags & IEEE80211_F_SCAN) {
|
|
if (scan.status == 0 && /* NB: on channel */
|
|
(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, ic->ic_curchan, &scan, wh,
|
|
subtype, rssi, nf);
|
|
return;
|
|
}
|
|
/*
|
|
* Check beacon for overlapping bss w/ non ERP stations.
|
|
* If we detect one and protection is configured but not
|
|
* enabled, enable it and start a timer that'll bring us
|
|
* out if we stop seeing the bss.
|
|
*/
|
|
if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
|
|
scan.status == 0 && /* NB: on-channel */
|
|
((scan.erp & 0x100) == 0 || /* NB: no ERP, 11b sta*/
|
|
(scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) {
|
|
ic->ic_lastnonerp = ticks;
|
|
ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR;
|
|
if (ic->ic_protmode != IEEE80211_PROT_NONE &&
|
|
(ic->ic_flags & IEEE80211_F_USEPROT) == 0) {
|
|
IEEE80211_NOTE_FRAME(vap,
|
|
IEEE80211_MSG_ASSOC, wh,
|
|
"non-ERP present on channel %d "
|
|
"(saw erp 0x%x from channel %d), "
|
|
"enable use of protection",
|
|
ic->ic_curchan->ic_ieee,
|
|
scan.erp, scan.chan);
|
|
ic->ic_flags |= IEEE80211_F_USEPROT;
|
|
ieee80211_notify_erp(ic);
|
|
}
|
|
}
|
|
/*
|
|
* Check beacon for non-HT station on HT channel
|
|
* and update HT BSS occupancy as appropriate.
|
|
*/
|
|
if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) {
|
|
if (scan.status & IEEE80211_BPARSE_OFFCHAN) {
|
|
/*
|
|
* Off control channel; only check frames
|
|
* that come in the extension channel when
|
|
* operating w/ HT40.
|
|
*/
|
|
if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan))
|
|
break;
|
|
if (scan.chan != ic->ic_curchan->ic_extieee)
|
|
break;
|
|
}
|
|
if (scan.htinfo == NULL) {
|
|
ieee80211_htprot_update(ic,
|
|
IEEE80211_HTINFO_OPMODE_PROTOPT |
|
|
IEEE80211_HTINFO_NONHT_PRESENT);
|
|
} else if (ishtmixed(scan.htinfo)) {
|
|
/* XXX? take NONHT_PRESENT from beacon? */
|
|
ieee80211_htprot_update(ic,
|
|
IEEE80211_HTINFO_OPMODE_MIXED |
|
|
IEEE80211_HTINFO_NONHT_PRESENT);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
|
|
if (vap->iv_state != IEEE80211_S_RUN) {
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
return;
|
|
}
|
|
/*
|
|
* Consult the ACL policy module if setup.
|
|
*/
|
|
if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
|
|
wh, NULL, "%s", "disallowed by ACL");
|
|
vap->iv_stats.is_rx_acl++;
|
|
return;
|
|
}
|
|
/*
|
|
* prreq frame format
|
|
* [tlv] ssid
|
|
* [tlv] supported rates
|
|
* [tlv] extended supported rates
|
|
*/
|
|
ssid = rates = xrates = NULL;
|
|
sfrm = frm;
|
|
while (efrm - frm > 1) {
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
|
|
switch (*frm) {
|
|
case IEEE80211_ELEMID_SSID:
|
|
ssid = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_RATES:
|
|
rates = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_XRATES:
|
|
xrates = frm;
|
|
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);
|
|
IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
|
|
IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
|
|
if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, NULL,
|
|
"%s", "no ssid with ssid suppression enabled");
|
|
vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/
|
|
return;
|
|
}
|
|
|
|
/* XXX find a better class or define it's own */
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
|
|
"%s", "recv probe req");
|
|
/*
|
|
* Some legacy 11b clients cannot hack a complete
|
|
* probe response frame. When the request includes
|
|
* only a bare-bones rate set, communicate this to
|
|
* the transmit side.
|
|
*/
|
|
ieee80211_send_proberesp(vap, wh->i_addr2,
|
|
is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0);
|
|
break;
|
|
|
|
case IEEE80211_FC0_SUBTYPE_AUTH: {
|
|
uint16_t algo, seq, status;
|
|
|
|
if (vap->iv_state != IEEE80211_S_RUN) {
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
return;
|
|
}
|
|
if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
|
|
wh, NULL, "%s", "wrong bssid");
|
|
vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/
|
|
return;
|
|
}
|
|
/*
|
|
* 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);
|
|
/*
|
|
* Consult the ACL policy module if setup.
|
|
*/
|
|
if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
|
|
wh, NULL, "%s", "disallowed by ACL");
|
|
vap->iv_stats.is_rx_acl++;
|
|
ieee80211_send_error(ni, wh->i_addr2,
|
|
IEEE80211_FC0_SUBTYPE_AUTH,
|
|
(seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16));
|
|
return;
|
|
}
|
|
if (vap->iv_flags & IEEE80211_F_COUNTERM) {
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
|
|
wh, NULL, "%s", "TKIP countermeasures enabled");
|
|
vap->iv_stats.is_rx_auth_countermeasures++;
|
|
ieee80211_send_error(ni, wh->i_addr2,
|
|
IEEE80211_FC0_SUBTYPE_AUTH,
|
|
IEEE80211_REASON_MIC_FAILURE);
|
|
return;
|
|
}
|
|
if (algo == IEEE80211_AUTH_ALG_SHARED)
|
|
hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf,
|
|
seq, status);
|
|
else if (algo == IEEE80211_AUTH_ALG_OPEN)
|
|
hostap_auth_open(ni, wh, rssi, nf, seq, status);
|
|
else if (algo == IEEE80211_AUTH_ALG_LEAP) {
|
|
authalgreject(ni, wh, algo,
|
|
seq+1, IEEE80211_STATUS_ALG);
|
|
return;
|
|
} else {
|
|
/*
|
|
* We assume that an unknown algorithm is the result
|
|
* of a decryption failure on a shared key auth frame;
|
|
* return a status code appropriate for that instead
|
|
* of IEEE80211_STATUS_ALG.
|
|
*
|
|
* NB: a seq# of 4 is intentional; the decrypted
|
|
* frame likely has a bogus seq value.
|
|
*/
|
|
authalgreject(ni, wh, algo,
|
|
4, IEEE80211_STATUS_CHALLENGE);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
|
|
case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: {
|
|
uint16_t capinfo, lintval;
|
|
struct ieee80211_rsnparms rsnparms;
|
|
|
|
if (vap->iv_state != IEEE80211_S_RUN) {
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
return;
|
|
}
|
|
if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
|
|
wh, NULL, "%s", "wrong bssid");
|
|
vap->iv_stats.is_rx_assoc_bss++;
|
|
return;
|
|
}
|
|
if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
|
|
reassoc = 1;
|
|
resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP;
|
|
} else {
|
|
reassoc = 0;
|
|
resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP;
|
|
}
|
|
if (ni == vap->iv_bss) {
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
|
|
"deny %s request, sta not authenticated",
|
|
reassoc ? "reassoc" : "assoc");
|
|
ieee80211_send_error(ni, wh->i_addr2,
|
|
IEEE80211_FC0_SUBTYPE_DEAUTH,
|
|
IEEE80211_REASON_ASSOC_NOT_AUTHED);
|
|
vap->iv_stats.is_rx_assoc_notauth++;
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* asreq frame format
|
|
* [2] capability information
|
|
* [2] listen interval
|
|
* [6*] current AP address (reassoc only)
|
|
* [tlv] ssid
|
|
* [tlv] supported rates
|
|
* [tlv] extended supported rates
|
|
* [tlv] WPA or RSN
|
|
* [tlv] HT capabilities
|
|
* [tlv] Atheros capabilities
|
|
*/
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return);
|
|
capinfo = le16toh(*(uint16_t *)frm); frm += 2;
|
|
lintval = le16toh(*(uint16_t *)frm); frm += 2;
|
|
if (reassoc)
|
|
frm += 6; /* ignore current AP info */
|
|
ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL;
|
|
sfrm = frm;
|
|
while (efrm - frm > 1) {
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
|
|
switch (*frm) {
|
|
case IEEE80211_ELEMID_SSID:
|
|
ssid = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_RATES:
|
|
rates = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_XRATES:
|
|
xrates = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_RSN:
|
|
rsn = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_HTCAP:
|
|
htcap = frm;
|
|
break;
|
|
case IEEE80211_ELEMID_VENDOR:
|
|
if (iswpaoui(frm))
|
|
wpa = frm;
|
|
else if (iswmeinfo(frm))
|
|
wme = frm;
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
else if (isatherosoui(frm))
|
|
ath = frm;
|
|
#endif
|
|
else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
|
|
if (ishtcapoui(frm) && htcap == NULL)
|
|
htcap = frm;
|
|
}
|
|
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);
|
|
IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
|
|
IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
|
|
if (htcap != NULL) {
|
|
IEEE80211_VERIFY_LENGTH(htcap[1],
|
|
htcap[0] == IEEE80211_ELEMID_VENDOR ?
|
|
4 + sizeof(struct ieee80211_ie_htcap)-2 :
|
|
sizeof(struct ieee80211_ie_htcap)-2,
|
|
return); /* XXX just NULL out? */
|
|
}
|
|
|
|
if ((vap->iv_flags & IEEE80211_F_WPA) &&
|
|
!wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo))
|
|
return;
|
|
/* discard challenge after association */
|
|
if (ni->ni_challenge != NULL) {
|
|
IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
|
|
ni->ni_challenge = NULL;
|
|
}
|
|
/* NB: 802.11 spec says to ignore station's privacy bit */
|
|
if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) {
|
|
capinfomismatch(ni, wh, reassoc, resp,
|
|
"capability", capinfo);
|
|
return;
|
|
}
|
|
/*
|
|
* Disallow re-associate w/ invalid slot time setting.
|
|
*/
|
|
if (ni->ni_associd != 0 &&
|
|
IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
|
|
((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) {
|
|
capinfomismatch(ni, wh, reassoc, resp,
|
|
"slot time", capinfo);
|
|
return;
|
|
}
|
|
rate = ieee80211_setup_rates(ni, rates, xrates,
|
|
IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
|
|
IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
|
|
if (rate & IEEE80211_RATE_BASIC) {
|
|
ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate);
|
|
vap->iv_stats.is_rx_assoc_norate++;
|
|
return;
|
|
}
|
|
/*
|
|
* If constrained to 11g-only stations reject an
|
|
* 11b-only station. We cheat a bit here by looking
|
|
* at the max negotiated xmit rate and assuming anyone
|
|
* with a best rate <24Mb/s is an 11b station.
|
|
*/
|
|
if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) {
|
|
ratesetmismatch(ni, wh, reassoc, resp, "11g", rate);
|
|
vap->iv_stats.is_rx_assoc_norate++;
|
|
return;
|
|
}
|
|
/*
|
|
* Do HT rate set handling and setup HT node state.
|
|
*/
|
|
ni->ni_chan = vap->iv_bss->ni_chan;
|
|
if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) {
|
|
rate = ieee80211_setup_htrates(ni, htcap,
|
|
IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO |
|
|
IEEE80211_F_DOBRS);
|
|
if (rate & IEEE80211_RATE_BASIC) {
|
|
ratesetmismatch(ni, wh, reassoc, resp,
|
|
"HT", rate);
|
|
vap->iv_stats.is_ht_assoc_norate++;
|
|
return;
|
|
}
|
|
ieee80211_ht_node_init(ni);
|
|
ieee80211_ht_updatehtcap(ni, htcap);
|
|
} else if (ni->ni_flags & IEEE80211_NODE_HT)
|
|
ieee80211_ht_node_cleanup(ni);
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
else if (ni->ni_ath_flags & IEEE80211_NODE_ATH)
|
|
ieee80211_ff_node_cleanup(ni);
|
|
#endif
|
|
/*
|
|
* Allow AMPDU operation only with unencrypted traffic
|
|
* or AES-CCM; the 11n spec only specifies these ciphers
|
|
* so permitting any others is undefined and can lead
|
|
* to interoperability problems.
|
|
*/
|
|
if ((ni->ni_flags & IEEE80211_NODE_HT) &&
|
|
(((vap->iv_flags & IEEE80211_F_WPA) &&
|
|
rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) ||
|
|
(vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) {
|
|
IEEE80211_NOTE(vap,
|
|
IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
|
|
"disallow HT use because WEP or TKIP requested, "
|
|
"capinfo 0x%x ucastcipher %d", capinfo,
|
|
rsnparms.rsn_ucastcipher);
|
|
ieee80211_ht_node_cleanup(ni);
|
|
vap->iv_stats.is_ht_assoc_downgrade++;
|
|
}
|
|
/*
|
|
* If constrained to 11n-only stations reject legacy stations.
|
|
*/
|
|
if ((vap->iv_flags_ht & IEEE80211_FHT_PUREN) &&
|
|
(ni->ni_flags & IEEE80211_NODE_HT) == 0) {
|
|
htcapmismatch(ni, wh, reassoc, resp);
|
|
vap->iv_stats.is_ht_assoc_nohtcap++;
|
|
return;
|
|
}
|
|
IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
|
|
ni->ni_noise = nf;
|
|
ni->ni_intval = lintval;
|
|
ni->ni_capinfo = capinfo;
|
|
ni->ni_fhdwell = vap->iv_bss->ni_fhdwell;
|
|
ni->ni_fhindex = vap->iv_bss->ni_fhindex;
|
|
/*
|
|
* Store the IEs.
|
|
* XXX maybe better to just expand
|
|
*/
|
|
if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) {
|
|
#define setie(_ie, _off) ieee80211_ies_setie(ni->ni_ies, _ie, _off)
|
|
if (wpa != NULL)
|
|
setie(wpa_ie, wpa - sfrm);
|
|
if (rsn != NULL)
|
|
setie(rsn_ie, rsn - sfrm);
|
|
if (htcap != NULL)
|
|
setie(htcap_ie, htcap - sfrm);
|
|
if (wme != NULL) {
|
|
setie(wme_ie, wme - sfrm);
|
|
/*
|
|
* Mark node as capable of QoS.
|
|
*/
|
|
ni->ni_flags |= IEEE80211_NODE_QOS;
|
|
} else
|
|
ni->ni_flags &= ~IEEE80211_NODE_QOS;
|
|
#ifdef IEEE80211_SUPPORT_SUPERG
|
|
if (ath != NULL) {
|
|
setie(ath_ie, ath - sfrm);
|
|
/*
|
|
* Parse ATH station parameters.
|
|
*/
|
|
ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
|
|
} else
|
|
#endif
|
|
ni->ni_ath_flags = 0;
|
|
#undef setie
|
|
} else {
|
|
ni->ni_flags &= ~IEEE80211_NODE_QOS;
|
|
ni->ni_ath_flags = 0;
|
|
}
|
|
ieee80211_node_join(ni, resp);
|
|
ieee80211_deliver_l2uf(ni);
|
|
break;
|
|
}
|
|
|
|
case IEEE80211_FC0_SUBTYPE_DEAUTH:
|
|
case IEEE80211_FC0_SUBTYPE_DISASSOC: {
|
|
uint16_t reason;
|
|
|
|
if (vap->iv_state != IEEE80211_S_RUN ||
|
|
/* NB: can happen when in promiscuous mode */
|
|
!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
break;
|
|
}
|
|
/*
|
|
* deauth/disassoc frame format
|
|
* [2] reason
|
|
*/
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
|
|
reason = le16toh(*(uint16_t *)frm);
|
|
if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) {
|
|
vap->iv_stats.is_rx_deauth++;
|
|
IEEE80211_NODE_STAT(ni, rx_deauth);
|
|
} else {
|
|
vap->iv_stats.is_rx_disassoc++;
|
|
IEEE80211_NODE_STAT(ni, rx_disassoc);
|
|
}
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
|
|
"recv %s (reason %d)", ieee80211_mgt_subtype_name[subtype >>
|
|
IEEE80211_FC0_SUBTYPE_SHIFT], reason);
|
|
if (ni != vap->iv_bss)
|
|
ieee80211_node_leave(ni);
|
|
break;
|
|
}
|
|
|
|
case IEEE80211_FC0_SUBTYPE_ACTION:
|
|
case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
|
|
if (ni == vap->iv_bss) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, NULL, "%s", "unknown node");
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
} else 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_RESP:
|
|
case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
|
|
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;
|
|
}
|
|
}
|
|
|
|
static void
|
|
hostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
|
|
{
|
|
switch (subtype) {
|
|
case IEEE80211_FC0_SUBTYPE_PS_POLL:
|
|
ni->ni_vap->iv_recv_pspoll(ni, m);
|
|
break;
|
|
case IEEE80211_FC0_SUBTYPE_BAR:
|
|
ieee80211_recv_bar(ni, m);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Process a received ps-poll frame.
|
|
*/
|
|
void
|
|
ieee80211_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211com *ic = vap->iv_ic;
|
|
struct ieee80211_frame_min *wh;
|
|
struct mbuf *m;
|
|
uint16_t aid;
|
|
int qlen;
|
|
|
|
wh = mtod(m0, struct ieee80211_frame_min *);
|
|
if (ni->ni_associd == 0) {
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
|
|
(struct ieee80211_frame *) wh, NULL,
|
|
"%s", "unassociated station");
|
|
vap->iv_stats.is_ps_unassoc++;
|
|
IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
|
|
IEEE80211_REASON_NOT_ASSOCED);
|
|
return;
|
|
}
|
|
|
|
aid = le16toh(*(uint16_t *)wh->i_dur);
|
|
if (aid != ni->ni_associd) {
|
|
IEEE80211_DISCARD(vap,
|
|
IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
|
|
(struct ieee80211_frame *) wh, NULL,
|
|
"aid mismatch: sta aid 0x%x poll aid 0x%x",
|
|
ni->ni_associd, aid);
|
|
vap->iv_stats.is_ps_badaid++;
|
|
/*
|
|
* NB: We used to deauth the station but it turns out
|
|
* the Blackberry Curve 8230 (and perhaps other devices)
|
|
* sometimes send the wrong AID when WME is negotiated.
|
|
* Being more lenient here seems ok as we already check
|
|
* the station is associated and we only return frames
|
|
* queued for the station (i.e. we don't use the AID).
|
|
*/
|
|
return;
|
|
}
|
|
|
|
/* Okay, take the first queued packet and put it out... */
|
|
m = ieee80211_node_psq_dequeue(ni, &qlen);
|
|
if (m == NULL) {
|
|
IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2,
|
|
"%s", "recv ps-poll, but queue empty");
|
|
ieee80211_send_nulldata(ieee80211_ref_node(ni));
|
|
vap->iv_stats.is_ps_qempty++; /* XXX node stat */
|
|
if (vap->iv_set_tim != NULL)
|
|
vap->iv_set_tim(ni, 0); /* just in case */
|
|
return;
|
|
}
|
|
/*
|
|
* If there are more packets, set the more packets bit
|
|
* in the packet dispatched to the station; otherwise
|
|
* turn off the TIM bit.
|
|
*/
|
|
if (qlen != 0) {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
|
|
"recv ps-poll, send packet, %u still queued", qlen);
|
|
m->m_flags |= M_MORE_DATA;
|
|
} else {
|
|
IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
|
|
"%s", "recv ps-poll, send packet, queue empty");
|
|
if (vap->iv_set_tim != NULL)
|
|
vap->iv_set_tim(ni, 0);
|
|
}
|
|
m->m_flags |= M_PWR_SAV; /* bypass PS handling */
|
|
|
|
/*
|
|
* Do the right thing; if it's an encap'ed frame then
|
|
* call ieee80211_parent_xmitpkt() else
|
|
* call ieee80211_vap_xmitpkt().
|
|
*/
|
|
if (m->m_flags & M_ENCAP) {
|
|
(void) ieee80211_parent_xmitpkt(ic, m);
|
|
} else {
|
|
(void) ieee80211_vap_xmitpkt(vap, m);
|
|
}
|
|
}
|