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52ef06dcfe
test in the adhoc mode rx path so classes derived from ahdemo mode can override the default behaviour
902 lines
26 KiB
C
902 lines
26 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 IBSS 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_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_adhoc.h>
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#include <net80211/ieee80211_input.h>
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#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2)
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static void adhoc_vattach(struct ieee80211vap *);
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static int adhoc_newstate(struct ieee80211vap *, enum ieee80211_state, int);
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static int adhoc_input(struct ieee80211_node *, struct mbuf *,
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int rssi, int noise, uint32_t rstamp);
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static void adhoc_recv_mgmt(struct ieee80211_node *, struct mbuf *,
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int subtype, int rssi, int noise, uint32_t rstamp);
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static void ahdemo_recv_mgmt(struct ieee80211_node *, struct mbuf *,
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int subtype, int rssi, int noise, uint32_t rstamp);
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void
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ieee80211_adhoc_attach(struct ieee80211com *ic)
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{
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ic->ic_vattach[IEEE80211_M_IBSS] = adhoc_vattach;
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ic->ic_vattach[IEEE80211_M_AHDEMO] = adhoc_vattach;
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}
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void
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ieee80211_adhoc_detach(struct ieee80211com *ic)
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{
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}
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static void
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adhoc_vdetach(struct ieee80211vap *vap)
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{
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}
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static void
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adhoc_vattach(struct ieee80211vap *vap)
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{
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vap->iv_newstate = adhoc_newstate;
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vap->iv_input = adhoc_input;
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if (vap->iv_opmode == IEEE80211_M_IBSS)
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vap->iv_recv_mgmt = adhoc_recv_mgmt;
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else
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vap->iv_recv_mgmt = ahdemo_recv_mgmt;
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vap->iv_opdetach = adhoc_vdetach;
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}
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/*
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* IEEE80211_M_IBSS+IEEE80211_M_AHDEMO vap state machine handler.
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*/
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static int
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adhoc_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
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{
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#ifdef IEEE80211_DEBUG
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struct ieee80211com *ic = vap->iv_ic;
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#endif
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struct ieee80211_node *ni;
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enum ieee80211_state ostate;
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IEEE80211_LOCK_ASSERT(vap->iv_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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ni = vap->iv_bss; /* NB: no reference held */
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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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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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break;
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case IEEE80211_S_SCAN:
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switch (ostate) {
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case IEEE80211_S_INIT:
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case IEEE80211_S_RUN: /* beacon miss */
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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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*/
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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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* This can happen because of a change in state
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* that requires a reset. Trigger a new scan
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* unless we're in manual roaming mode in which
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* case an application must issue an explicit request.
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*/
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if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
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ieee80211_check_scan_current(vap);
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break;
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default:
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goto invalid;
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}
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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_SCAN:
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#ifdef IEEE80211_DEBUG
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if (ieee80211_msg_debug(vap)) {
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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(vap->iv_bss->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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goto invalid;
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}
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/*
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* When 802.1x is not in use mark the port authorized
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* at this point so traffic can flow.
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*/
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if (ni->ni_authmode != IEEE80211_AUTH_8021X)
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ieee80211_node_authorize(ni);
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break;
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case IEEE80211_S_SLEEP:
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ieee80211_sta_pwrsave(vap, 0);
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break;
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default:
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invalid:
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IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
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"%s: unexpected state transition %s -> %s\n", __func__,
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ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
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break;
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}
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return 0;
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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 1;
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}
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return 1;
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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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adhoc_input(struct ieee80211_node *ni, struct mbuf *m,
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int rssi, int noise, uint32_t rstamp)
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{
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#define SEQ_LEQ(a,b) ((int)((a)-(b)) <= 0)
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#define HAS_SEQ(type) ((type & 0x4) == 0)
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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;
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struct ether_header *eh;
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int hdrspace, need_tap;
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uint8_t dir, type, subtype, qos;
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uint8_t *bssid;
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uint16_t rxseq;
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if (m->m_flags & M_AMPDU_MPDU) {
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/*
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* Fastpath for A-MPDU reorder q resubmission. Frames
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* w/ M_AMPDU_MPDU marked have already passed through
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* here but were received out of order and been held on
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* the reorder queue. When resubmitted they are marked
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* with the M_AMPDU_MPDU flag and we can bypass most of
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* the normal processing.
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*/
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wh = mtod(m, struct ieee80211_frame *);
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type = IEEE80211_FC0_TYPE_DATA;
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dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
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subtype = IEEE80211_FC0_SUBTYPE_QOS;
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hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */
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goto resubmit_ampdu;
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}
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KASSERT(ni != NULL, ("null node"));
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ni->ni_inact = ni->ni_inact_reload;
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need_tap = 1; /* mbuf need to be tapped. */
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type = -1; /* undefined */
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if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
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IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
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ni->ni_macaddr, NULL,
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"too short (1): len %u", m->m_pkthdr.len);
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vap->iv_stats.is_rx_tooshort++;
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goto out;
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}
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/*
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* Bit of a cheat here, we use a pointer for a 3-address
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* frame format but don't reference fields past outside
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* ieee80211_frame_min w/o first validating the data is
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* present.
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*/
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wh = mtod(m, struct ieee80211_frame *);
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if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
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IEEE80211_FC0_VERSION_0) {
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IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
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ni->ni_macaddr, NULL, "wrong version %x", wh->i_fc[0]);
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vap->iv_stats.is_rx_badversion++;
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goto err;
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}
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dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
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type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
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subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
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if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
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if (dir != IEEE80211_FC1_DIR_NODS)
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bssid = wh->i_addr1;
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else if (type == IEEE80211_FC0_TYPE_CTL)
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bssid = wh->i_addr1;
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else {
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if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
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IEEE80211_DISCARD_MAC(vap,
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IEEE80211_MSG_ANY, ni->ni_macaddr,
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NULL, "too short (2): len %u",
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m->m_pkthdr.len);
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vap->iv_stats.is_rx_tooshort++;
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goto out;
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}
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bssid = wh->i_addr3;
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}
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/*
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* Validate the bssid.
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*/
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if (!IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) &&
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!IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) {
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/* not interested in */
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IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
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bssid, NULL, "%s", "not to bss");
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vap->iv_stats.is_rx_wrongbss++;
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goto out;
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}
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/*
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* Data frame, cons up a node when it doesn't
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* exist. This should probably done after an ACL check.
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*/
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if (type == IEEE80211_FC0_TYPE_DATA &&
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ni == vap->iv_bss &&
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!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
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/*
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* Fake up a node for this newly
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* discovered member of the IBSS.
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*/
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ni = ieee80211_fakeup_adhoc_node(vap, wh->i_addr2);
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if (ni == NULL) {
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/* NB: stat kept for alloc failure */
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goto err;
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}
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}
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IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
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ni->ni_noise = noise;
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ni->ni_rstamp = rstamp;
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if (HAS_SEQ(type)) {
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uint8_t tid = ieee80211_gettid(wh);
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if (IEEE80211_QOS_HAS_SEQ(wh) &&
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TID_TO_WME_AC(tid) >= WME_AC_VI)
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ic->ic_wme.wme_hipri_traffic++;
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rxseq = le16toh(*(uint16_t *)wh->i_seq);
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if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 &&
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(wh->i_fc[1] & IEEE80211_FC1_RETRY) &&
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SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) {
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/* duplicate, discard */
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IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
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bssid, "duplicate",
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"seqno <%u,%u> fragno <%u,%u> tid %u",
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rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
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ni->ni_rxseqs[tid] >>
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IEEE80211_SEQ_SEQ_SHIFT,
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rxseq & IEEE80211_SEQ_FRAG_MASK,
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ni->ni_rxseqs[tid] &
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IEEE80211_SEQ_FRAG_MASK,
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tid);
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vap->iv_stats.is_rx_dup++;
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IEEE80211_NODE_STAT(ni, rx_dup);
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goto out;
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}
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ni->ni_rxseqs[tid] = rxseq;
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}
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}
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switch (type) {
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case IEEE80211_FC0_TYPE_DATA:
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hdrspace = ieee80211_hdrspace(ic, wh);
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if (m->m_len < hdrspace &&
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(m = m_pullup(m, hdrspace)) == NULL) {
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IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
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ni->ni_macaddr, NULL,
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"data too short: expecting %u", hdrspace);
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vap->iv_stats.is_rx_tooshort++;
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goto out; /* XXX */
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}
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if (dir != IEEE80211_FC1_DIR_NODS) {
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IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
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wh, "data", "incorrect dir 0x%x", dir);
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vap->iv_stats.is_rx_wrongdir++;
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goto out;
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}
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/* XXX no power-save support */
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/*
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* Handle A-MPDU re-ordering. If the frame is to be
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* processed directly then ieee80211_ampdu_reorder
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* will return 0; otherwise it has consumed the mbuf
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* and we should do nothing more with it.
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*/
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if ((m->m_flags & M_AMPDU) &&
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ieee80211_ampdu_reorder(ni, m) != 0) {
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m = NULL;
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goto out;
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}
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resubmit_ampdu:
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/*
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* Handle privacy requirements. Note that we
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* must not be preempted from here until after
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* we (potentially) call ieee80211_crypto_demic;
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* otherwise we may violate assumptions in the
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* crypto cipher modules used to do delayed update
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* of replay sequence numbers.
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*/
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if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
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if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
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/*
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* Discard encrypted frames when privacy is off.
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*/
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IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
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wh, "WEP", "%s", "PRIVACY off");
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vap->iv_stats.is_rx_noprivacy++;
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IEEE80211_NODE_STAT(ni, rx_noprivacy);
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goto out;
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}
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key = ieee80211_crypto_decap(ni, m, hdrspace);
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if (key == NULL) {
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/* NB: stats+msgs handled in crypto_decap */
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IEEE80211_NODE_STAT(ni, rx_wepfail);
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goto out;
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}
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wh = mtod(m, struct ieee80211_frame *);
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wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
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} else {
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/* XXX M_WEP and IEEE80211_F_PRIVACY */
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key = NULL;
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}
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/*
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* Save QoS bits for use below--before we strip the header.
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*/
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if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
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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 (bpf_peers_present(vap->iv_rawbpf))
|
|
bpf_mtap(vap->iv_rawbpf, 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 if ((ni->ni_ath_flags & IEEE80211_NODE_FF) &&
|
|
#define FF_LLC_SIZE (sizeof(struct ether_header) + sizeof(struct llc))
|
|
m->m_pkthdr.len >= 3*FF_LLC_SIZE) {
|
|
struct llc *llc;
|
|
|
|
/*
|
|
* Check for fast-frame tunnel encapsulation.
|
|
*/
|
|
if (m->m_len < FF_LLC_SIZE &&
|
|
(m = m_pullup(m, FF_LLC_SIZE)) == NULL) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
|
|
ni->ni_macaddr, "fast-frame",
|
|
"%s", "m_pullup(llc) failed");
|
|
vap->iv_stats.is_rx_tooshort++;
|
|
return IEEE80211_FC0_TYPE_DATA;
|
|
}
|
|
llc = (struct llc *)(mtod(m, uint8_t *) +
|
|
sizeof(struct ether_header));
|
|
if (llc->llc_snap.ether_type == htons(ATH_FF_ETH_TYPE)) {
|
|
m_adj(m, FF_LLC_SIZE);
|
|
m = ieee80211_decap_fastframe(ni, m);
|
|
if (m == NULL)
|
|
return IEEE80211_FC0_TYPE_DATA;
|
|
}
|
|
}
|
|
#undef FF_LLC_SIZE
|
|
if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL)
|
|
ieee80211_deliver_data(ni->ni_wdsvap, ni, m);
|
|
else
|
|
ieee80211_deliver_data(vap, ni, m);
|
|
return IEEE80211_FC0_TYPE_DATA;
|
|
|
|
case IEEE80211_FC0_TYPE_MGT:
|
|
vap->iv_stats.is_rx_mgmt++;
|
|
IEEE80211_NODE_STAT(ni, rx_mgmt);
|
|
if (dir != IEEE80211_FC1_DIR_NODS) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, "data", "incorrect dir 0x%x", dir);
|
|
vap->iv_stats.is_rx_wrongdir++;
|
|
goto err;
|
|
}
|
|
if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
|
|
IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
|
|
ni->ni_macaddr, "mgt", "too short: len %u",
|
|
m->m_pkthdr.len);
|
|
vap->iv_stats.is_rx_tooshort++;
|
|
goto out;
|
|
}
|
|
#ifdef IEEE80211_DEBUG
|
|
if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
|
|
ieee80211_msg_dumppkts(vap)) {
|
|
if_printf(ifp, "received %s from %s rssi %d\n",
|
|
ieee80211_mgt_subtype_name[subtype >>
|
|
IEEE80211_FC0_SUBTYPE_SHIFT],
|
|
ether_sprintf(wh->i_addr2), rssi);
|
|
}
|
|
#endif
|
|
if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, NULL, "%s", "WEP set but not permitted");
|
|
vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
|
|
goto out;
|
|
}
|
|
if (bpf_peers_present(vap->iv_rawbpf))
|
|
bpf_mtap(vap->iv_rawbpf, m);
|
|
vap->iv_recv_mgmt(ni, m, subtype, rssi, noise, rstamp);
|
|
m_freem(m);
|
|
return IEEE80211_FC0_TYPE_MGT;
|
|
|
|
case IEEE80211_FC0_TYPE_CTL:
|
|
vap->iv_stats.is_rx_ctl++;
|
|
IEEE80211_NODE_STAT(ni, rx_ctrl);
|
|
goto out;
|
|
default:
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
|
|
wh, "bad", "frame type 0x%x", type);
|
|
/* should not come here */
|
|
break;
|
|
}
|
|
err:
|
|
ifp->if_ierrors++;
|
|
out:
|
|
if (m != NULL) {
|
|
if (bpf_peers_present(vap->iv_rawbpf) && need_tap)
|
|
bpf_mtap(vap->iv_rawbpf, m);
|
|
m_freem(m);
|
|
}
|
|
return type;
|
|
#undef SEQ_LEQ
|
|
}
|
|
|
|
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
|
|
adhoc_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
|
|
int subtype, int rssi, int noise, uint32_t rstamp)
|
|
{
|
|
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;
|
|
|
|
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 to discover neighbors.
|
|
*/
|
|
if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
|
|
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 (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, &scan, wh,
|
|
subtype, rssi, noise, rstamp);
|
|
return;
|
|
}
|
|
if (scan.capinfo & IEEE80211_CAPINFO_IBSS) {
|
|
if (!IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_macaddr)) {
|
|
/*
|
|
* Create a new entry in the neighbor table.
|
|
*/
|
|
ni = ieee80211_add_neighbor(vap, wh, &scan);
|
|
} else if (ni->ni_capinfo == 0) {
|
|
/*
|
|
* Update faked node created on transmit.
|
|
* Note this also updates the tsf.
|
|
*/
|
|
ieee80211_init_neighbor(ni, wh, &scan);
|
|
} else {
|
|
/*
|
|
* Record tsf for potential resync.
|
|
*/
|
|
memcpy(ni->ni_tstamp.data, scan.tstamp,
|
|
sizeof(ni->ni_tstamp));
|
|
}
|
|
if (ni != NULL) {
|
|
IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
|
|
ni->ni_noise = noise;
|
|
ni->ni_rstamp = rstamp;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
|
|
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++;
|
|
return;
|
|
}
|
|
if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
|
|
/* frame must be directed */
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, NULL, "%s", "not unicast");
|
|
vap->iv_stats.is_rx_mgtdiscard++; /* XXX stat */
|
|
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_ACTION: {
|
|
const struct ieee80211_action *ia;
|
|
|
|
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++;
|
|
return;
|
|
}
|
|
/*
|
|
* action frame format:
|
|
* [1] category
|
|
* [1] action
|
|
* [tlv] parameters
|
|
*/
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm,
|
|
sizeof(struct ieee80211_action), return);
|
|
ia = (const struct ieee80211_action *) frm;
|
|
|
|
vap->iv_stats.is_rx_action++;
|
|
IEEE80211_NODE_STAT(ni, rx_action);
|
|
|
|
/* verify frame payloads but defer processing */
|
|
/* XXX maybe push this to method */
|
|
switch (ia->ia_category) {
|
|
case IEEE80211_ACTION_CAT_BA:
|
|
switch (ia->ia_action) {
|
|
case IEEE80211_ACTION_BA_ADDBA_REQUEST:
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm,
|
|
sizeof(struct ieee80211_action_ba_addbarequest),
|
|
return);
|
|
break;
|
|
case IEEE80211_ACTION_BA_ADDBA_RESPONSE:
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm,
|
|
sizeof(struct ieee80211_action_ba_addbaresponse),
|
|
return);
|
|
break;
|
|
case IEEE80211_ACTION_BA_DELBA:
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm,
|
|
sizeof(struct ieee80211_action_ba_delba),
|
|
return);
|
|
break;
|
|
}
|
|
break;
|
|
case IEEE80211_ACTION_CAT_HT:
|
|
switch (ia->ia_action) {
|
|
case IEEE80211_ACTION_HT_TXCHWIDTH:
|
|
IEEE80211_VERIFY_LENGTH(efrm - frm,
|
|
sizeof(struct ieee80211_action_ht_txchwidth),
|
|
return);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
ic->ic_recv_action(ni, frm, efrm);
|
|
break;
|
|
}
|
|
|
|
case IEEE80211_FC0_SUBTYPE_AUTH:
|
|
case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
|
|
case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
|
|
case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
|
|
case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
|
|
case IEEE80211_FC0_SUBTYPE_DEAUTH:
|
|
case IEEE80211_FC0_SUBTYPE_DISASSOC:
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
|
|
wh, NULL, "%s", "not handled");
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
return;
|
|
|
|
default:
|
|
IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
|
|
wh, "mgt", "subtype 0x%x not handled", subtype);
|
|
vap->iv_stats.is_rx_badsubtype++;
|
|
break;
|
|
}
|
|
}
|
|
#undef IEEE80211_VERIFY_LENGTH
|
|
#undef IEEE80211_VERIFY_ELEMENT
|
|
|
|
static void
|
|
ahdemo_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
|
|
int subtype, int rssi, int noise, uint32_t rstamp)
|
|
{
|
|
struct ieee80211vap *vap = ni->ni_vap;
|
|
struct ieee80211com *ic = ni->ni_ic;
|
|
|
|
/*
|
|
* Process management frames when scanning; useful for doing
|
|
* a site-survey.
|
|
*/
|
|
if (ic->ic_flags & IEEE80211_F_SCAN)
|
|
adhoc_recv_mgmt(ni, m0, subtype, rssi, noise, rstamp);
|
|
else
|
|
vap->iv_stats.is_rx_mgtdiscard++;
|
|
}
|