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/*-
* Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifdef __FreeBSD__
__FBSDID("$FreeBSD$");
#endif
/*
* IEEE 802.11 Monitor mode support.
*/
#include "opt_inet.h"
#include "opt_wlan.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/endian.h>
#include <sys/errno.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/if_llc.h>
#include <net/ethernet.h>
#include <net/bpf.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_monitor.h>
static void monitor_vattach(struct ieee80211vap *);
static int monitor_newstate(struct ieee80211vap *, enum ieee80211_state, int);
static int monitor_input(struct ieee80211_node *ni, struct mbuf *m,
int rssi, int noise, uint32_t rstamp);
void
ieee80211_monitor_attach(struct ieee80211com *ic)
{
ic->ic_vattach[IEEE80211_M_MONITOR] = monitor_vattach;
}
void
ieee80211_monitor_detach(struct ieee80211com *ic)
{
}
static void
monitor_vdetach(struct ieee80211vap *vap)
{
}
static void
monitor_vattach(struct ieee80211vap *vap)
{
vap->iv_newstate = monitor_newstate;
vap->iv_input = monitor_input;
vap->iv_opdetach = monitor_vdetach;
}
/*
* IEEE80211_M_MONITOR vap state machine handler.
*/
static int
monitor_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
{
struct ieee80211com *ic = vap->iv_ic;
enum ieee80211_state ostate;
IEEE80211_LOCK_ASSERT(ic);
ostate = vap->iv_state;
IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
__func__, ieee80211_state_name[ostate],
ieee80211_state_name[nstate], arg);
vap->iv_state = nstate; /* state transition */
if (nstate == IEEE80211_S_RUN) {
switch (ostate) {
case IEEE80211_S_INIT:
ieee80211_create_ibss(vap, ic->ic_curchan);
break;
default:
break;
}
/*
* NB: this shouldn't be here but many people use
* monitor mode for raw packets; once we switch
* them over to adhoc demo mode remove this.
*/
ieee80211_node_authorize(vap->iv_bss);
}
return 0;
}
/*
* Process a received frame in monitor mode.
*/
static int
monitor_input(struct ieee80211_node *ni, struct mbuf *m,
int rssi, int noise, uint32_t rstamp)
{
struct ieee80211vap *vap = ni->ni_vap;
if (bpf_peers_present(vap->iv_rawbpf))
bpf_mtap(vap->iv_rawbpf, m);
m_freem(m);
return -1;
}
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