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Current Path: /usr/src/sys/net80211

📁 ..
📄 _ieee80211.h(25.44 KB)
📄 ieee80211.c(71.87 KB)
📄 ieee80211.h(48.7 KB)
📄 ieee80211_acl.c(8.64 KB)
📄 ieee80211_action.c(8.16 KB)
📄 ieee80211_action.h(2.27 KB)
📄 ieee80211_adhoc.c(30.5 KB)
📄 ieee80211_adhoc.h(1.65 KB)
📄 ieee80211_ageq.c(6.17 KB)
📄 ieee80211_ageq.h(2.36 KB)
📄 ieee80211_alq.c(4.85 KB)
📄 ieee80211_alq.h(2.26 KB)
📄 ieee80211_amrr.c(14.35 KB)
📄 ieee80211_amrr.h(1.89 KB)
📄 ieee80211_crypto.c(21.96 KB)
📄 ieee80211_crypto.h(10.35 KB)
📄 ieee80211_crypto_ccmp.c(18.27 KB)
📄 ieee80211_crypto_none.c(4.3 KB)
📄 ieee80211_crypto_tkip.c(30.23 KB)
📄 ieee80211_crypto_wep.c(15.13 KB)
📄 ieee80211_ddb.c(29.23 KB)
📄 ieee80211_dfs.c(12.5 KB)
📄 ieee80211_dfs.h(2.5 KB)
📄 ieee80211_freebsd.c(29.56 KB)
📄 ieee80211_freebsd.h(24.14 KB)
📄 ieee80211_hostap.c(70.12 KB)
📄 ieee80211_hostap.h(1.75 KB)
📄 ieee80211_ht.c(104.16 KB)
📄 ieee80211_ht.h(9.15 KB)
📄 ieee80211_hwmp.c(65.62 KB)
📄 ieee80211_input.c(27.5 KB)
📄 ieee80211_input.h(10.19 KB)
📄 ieee80211_ioctl.c(103.57 KB)
📄 ieee80211_ioctl.h(37.22 KB)
📄 ieee80211_mesh.c(104.89 KB)
📄 ieee80211_mesh.h(19.62 KB)
📄 ieee80211_monitor.c(3.87 KB)
📄 ieee80211_monitor.h(1.65 KB)
📄 ieee80211_node.c(86.68 KB)
📄 ieee80211_node.h(21.23 KB)
📄 ieee80211_output.c(119.38 KB)
📄 ieee80211_phy.c(21.24 KB)
📄 ieee80211_phy.h(7.16 KB)
📄 ieee80211_power.c(17.37 KB)
📄 ieee80211_power.h(3.47 KB)
📄 ieee80211_proto.c(81.17 KB)
📄 ieee80211_proto.h(18.49 KB)
📄 ieee80211_radiotap.c(10.36 KB)
📄 ieee80211_radiotap.h(14.32 KB)
📄 ieee80211_ratectl.c(4.06 KB)
📄 ieee80211_ratectl.h(5.49 KB)
📄 ieee80211_ratectl_none.c(3.15 KB)
📄 ieee80211_regdomain.c(14.23 KB)
📄 ieee80211_regdomain.h(10.49 KB)
📄 ieee80211_rssadapt.c(10.82 KB)
📄 ieee80211_rssadapt.h(2.91 KB)
📄 ieee80211_scan.c(18.27 KB)
📄 ieee80211_scan.h(14.65 KB)
📄 ieee80211_scan_sta.c(57.3 KB)
📄 ieee80211_scan_sw.c(30.55 KB)
📄 ieee80211_scan_sw.h(1.51 KB)
📄 ieee80211_sta.c(60.31 KB)
📄 ieee80211_sta.h(2 KB)
📄 ieee80211_superg.c(29.08 KB)
📄 ieee80211_superg.h(5.42 KB)
📄 ieee80211_tdma.c(24.46 KB)
📄 ieee80211_tdma.h(4.05 KB)
📄 ieee80211_var.h(45.45 KB)
📄 ieee80211_vht.c(24.16 KB)
📄 ieee80211_vht.h(2.85 KB)
📄 ieee80211_wds.c(23.31 KB)
📄 ieee80211_wds.h(1.81 KB)
📄 ieee80211_wps.h(6.59 KB)
📄 ieee80211_xauth.c(2.79 KB)

Editing: ieee80211_radiotap.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2009 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>
__FBSDID("$FreeBSD$");

/*
 * IEEE 802.11 radiotap support.
 */
#include "opt_wlan.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>   
#include <sys/malloc.h>
#include <sys/endian.h>
#include <sys/kernel.h>

#include <sys/socket.h>

#include <net/bpf.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_media.h>
#include <net/ethernet.h>

#include <net80211/ieee80211_var.h>

static int radiotap_offset(struct ieee80211_radiotap_header *, int, int);

void
ieee80211_radiotap_attach(struct ieee80211com *ic,
	struct ieee80211_radiotap_header *th, int tlen, uint32_t tx_radiotap,
	struct ieee80211_radiotap_header *rh, int rlen, uint32_t rx_radiotap)
{
	ieee80211_radiotap_attachv(ic, th, tlen, 0, tx_radiotap,
	    rh, rlen, 0, rx_radiotap);
}

void
ieee80211_radiotap_attachv(struct ieee80211com *ic,
	struct ieee80211_radiotap_header *th,
	int tlen, int n_tx_v, uint32_t tx_radiotap,
	struct ieee80211_radiotap_header *rh,
	int rlen, int n_rx_v, uint32_t rx_radiotap)
{
#define	B(_v)	(1<<(_v))
	int off;

th->it_len = htole16(roundup2(tlen, sizeof(uint32_t)));
	th->it_present = htole32(tx_radiotap);
	ic->ic_th = th;
	/* calculate offset to channel data */
	off = -1;
	if (tx_radiotap & B(IEEE80211_RADIOTAP_CHANNEL))
		off = radiotap_offset(th, n_tx_v, IEEE80211_RADIOTAP_CHANNEL);
	else if (tx_radiotap & B(IEEE80211_RADIOTAP_XCHANNEL))
		off = radiotap_offset(th, n_tx_v, IEEE80211_RADIOTAP_XCHANNEL);
	if (off == -1) {
		ic_printf(ic, "%s: no tx channel, radiotap 0x%x\n", __func__,
		    tx_radiotap);
		/* NB: we handle this case but data will have no chan spec */
	} else
		ic->ic_txchan = ((uint8_t *) th) + off;

rh->it_len = htole16(roundup2(rlen, sizeof(uint32_t)));
	rh->it_present = htole32(rx_radiotap);
	ic->ic_rh = rh;
	/* calculate offset to channel data */
	off = -1;
	if (rx_radiotap & B(IEEE80211_RADIOTAP_CHANNEL))
		off = radiotap_offset(rh, n_rx_v, IEEE80211_RADIOTAP_CHANNEL);
	else if (rx_radiotap & B(IEEE80211_RADIOTAP_XCHANNEL))
		off = radiotap_offset(rh, n_rx_v, IEEE80211_RADIOTAP_XCHANNEL);
	if (off == -1) {
		ic_printf(ic, "%s: no rx channel, radiotap 0x%x\n", __func__,
		    rx_radiotap);
		/* NB: we handle this case but data will have no chan spec */
	} else
		ic->ic_rxchan = ((uint8_t *) rh) + off;
#undef B
}

void
ieee80211_radiotap_detach(struct ieee80211com *ic)
{
}

void
ieee80211_radiotap_vattach(struct ieee80211vap *vap)
{
	struct ieee80211com *ic = vap->iv_ic;
	struct ieee80211_radiotap_header *th = ic->ic_th;

if (th != NULL && ic->ic_rh != NULL) {
		/* radiotap DLT for raw 802.11 frames */
		bpfattach2(vap->iv_ifp, DLT_IEEE802_11_RADIO,
		    sizeof(struct ieee80211_frame) + le16toh(th->it_len),
		    &vap->iv_rawbpf);
	}
}

void
ieee80211_radiotap_vdetach(struct ieee80211vap *vap)
{
	/* NB: bpfattach is called by ether_ifdetach and claims all taps */
}

static void
set_channel(void *p, const struct ieee80211_channel *c)
{
	struct {
		uint16_t	freq;
		uint16_t	flags;
	} *rc = p;

rc->freq = htole16(c->ic_freq);
	rc->flags = htole16(c->ic_flags);
}

static void
set_xchannel(void *p, const struct ieee80211_channel *c)
{
	struct {
		uint32_t	flags;
		uint16_t	freq;
		uint8_t		ieee;
		uint8_t		maxpow;
	} *rc = p;

rc->flags = htole32(c->ic_flags);
	rc->freq = htole16(c->ic_freq);
	rc->ieee = c->ic_ieee;
	rc->maxpow = c->ic_maxregpower;
}

/*
 * Update radiotap state on channel change.
 */
void
ieee80211_radiotap_chan_change(struct ieee80211com *ic)
{
	if (ic->ic_rxchan != NULL) {
		struct ieee80211_radiotap_header *rh = ic->ic_rh;

if (rh->it_present & htole32(1<<IEEE80211_RADIOTAP_XCHANNEL))
			set_xchannel(ic->ic_rxchan, ic->ic_curchan);
		else if (rh->it_present & htole32(1<<IEEE80211_RADIOTAP_CHANNEL))
			set_channel(ic->ic_rxchan, ic->ic_curchan);
	}
	if (ic->ic_txchan != NULL) {
		struct ieee80211_radiotap_header *th = ic->ic_th;

if (th->it_present & htole32(1<<IEEE80211_RADIOTAP_XCHANNEL))
			set_xchannel(ic->ic_txchan, ic->ic_curchan);
		else if (th->it_present & htole32(1<<IEEE80211_RADIOTAP_CHANNEL))
			set_channel(ic->ic_txchan, ic->ic_curchan);
	}
}

/*
 * Distribute radiotap data (+packet) to all monitor mode
 * vaps with an active tap other than vap0.
 */
static void
spam_vaps(struct ieee80211vap *vap0, struct mbuf *m,
	struct ieee80211_radiotap_header *rh, int len)
{
	struct ieee80211com *ic = vap0->iv_ic;
	struct ieee80211vap *vap;

TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
		if (vap != vap0 &&
		    vap->iv_opmode == IEEE80211_M_MONITOR &&
		    (vap->iv_flags_ext & IEEE80211_FEXT_BPF) &&
		    vap->iv_state != IEEE80211_S_INIT)
			bpf_mtap2(vap->iv_rawbpf, rh, len, m);
	}
}

/*
 * Dispatch radiotap data for transmitted packet.
 */
void
ieee80211_radiotap_tx(struct ieee80211vap *vap0, struct mbuf *m)
{
	struct ieee80211com *ic = vap0->iv_ic;
	struct ieee80211_radiotap_header *th = ic->ic_th;
	int len;

KASSERT(th != NULL, ("no tx radiotap header"));
	len = le16toh(th->it_len);

if (vap0->iv_flags_ext & IEEE80211_FEXT_BPF)
		bpf_mtap2(vap0->iv_rawbpf, th, len, m);
	/*
	 * Spam monitor mode vaps.
	 */
	if (ic->ic_montaps != 0)
		spam_vaps(vap0, m, th, len);
}

/*
 * Dispatch radiotap data for received packet.
 */
void
ieee80211_radiotap_rx(struct ieee80211vap *vap0, struct mbuf *m)
{
	struct ieee80211com *ic = vap0->iv_ic;
	struct ieee80211_radiotap_header *rh = ic->ic_rh;
	int len;

KASSERT(rh != NULL, ("no rx radiotap header"));
	len = le16toh(rh->it_len);

if (vap0->iv_flags_ext & IEEE80211_FEXT_BPF)
		bpf_mtap2(vap0->iv_rawbpf, rh, len, m);
	/*
	 * Spam monitor mode vaps with unicast frames.  Multicast
	 * frames are handled by passing through ieee80211_input_all
	 * which distributes copies to the monitor mode vaps.
	 */
	if (ic->ic_montaps != 0 && (m->m_flags & M_BCAST) == 0)
		spam_vaps(vap0, m, rh, len);
}

/*
 * Dispatch radiotap data for a packet received outside the normal
 * rx processing path; this is used, for example, to handle frames
 * received with errors that would otherwise be dropped.
 */
void
ieee80211_radiotap_rx_all(struct ieee80211com *ic, struct mbuf *m)
{
	struct ieee80211_radiotap_header *rh = ic->ic_rh;
	int len = le16toh(rh->it_len);
	struct ieee80211vap *vap;

/* XXX locking? */
	TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
		if (ieee80211_radiotap_active_vap(vap) &&
		    vap->iv_state != IEEE80211_S_INIT)
			bpf_mtap2(vap->iv_rawbpf, rh, len, m);
	}
}

/*
 * Return the offset of the specified item in the radiotap
 * header description.  If the item is not present or is not
 * known -1 is returned.
 */
static int
radiotap_offset(struct ieee80211_radiotap_header *rh,
    int n_vendor_attributes, int item)
{
	static const struct {
		size_t	align, width;
	} items[] = {
		[IEEE80211_RADIOTAP_TSFT] = {
		    .align	= sizeof(uint64_t),
		    .width	= sizeof(uint64_t),
		},
		[IEEE80211_RADIOTAP_FLAGS] = {
		    .align	= sizeof(uint8_t),
		    .width	= sizeof(uint8_t),
		},
		[IEEE80211_RADIOTAP_RATE] = {
		    .align	= sizeof(uint8_t),
		    .width	= sizeof(uint8_t),
		},
		[IEEE80211_RADIOTAP_CHANNEL] = {
		    .align	= sizeof(uint16_t),
		    .width	= 2*sizeof(uint16_t),
		},
		[IEEE80211_RADIOTAP_FHSS] = {
		    .align	= sizeof(uint16_t),
		    .width	= sizeof(uint16_t),
		},
		[IEEE80211_RADIOTAP_DBM_ANTSIGNAL] = {
		    .align	= sizeof(uint8_t),
		    .width	= sizeof(uint8_t),
		},
		[IEEE80211_RADIOTAP_DBM_ANTNOISE] = {
		    .align	= sizeof(uint8_t),
		    .width	= sizeof(uint8_t),
		},
		[IEEE80211_RADIOTAP_LOCK_QUALITY] = {
		    .align	= sizeof(uint16_t),
		    .width	= sizeof(uint16_t),
		},
		[IEEE80211_RADIOTAP_TX_ATTENUATION] = {
		    .align	= sizeof(uint16_t),
		    .width	= sizeof(uint16_t),
		},
		[IEEE80211_RADIOTAP_DB_TX_ATTENUATION] = {
		    .align	= sizeof(uint16_t),
		    .width	= sizeof(uint16_t),
		},
		[IEEE80211_RADIOTAP_DBM_TX_POWER] = {
		    .align	= sizeof(uint8_t),
		    .width	= sizeof(uint8_t),
		},
		[IEEE80211_RADIOTAP_ANTENNA] = {
		    .align	= sizeof(uint8_t),
		    .width	= sizeof(uint8_t),
		},
		[IEEE80211_RADIOTAP_DB_ANTSIGNAL] = {
		    .align	= sizeof(uint8_t),
		    .width	= sizeof(uint8_t),
		},
		[IEEE80211_RADIOTAP_DB_ANTNOISE] = {
		    .align	= sizeof(uint8_t),
		    .width	= sizeof(uint8_t),
		},
		[IEEE80211_RADIOTAP_XCHANNEL] = {
		    .align	= sizeof(uint32_t),
		    .width	= 2*sizeof(uint32_t),
		},
		[IEEE80211_RADIOTAP_MCS] = {
		    .align	= sizeof(uint8_t),
		    .width	= 3*sizeof(uint8_t),
		},
	};
	uint32_t present = le32toh(rh->it_present);
	int off, i;

off = sizeof(struct ieee80211_radiotap_header);
	off += n_vendor_attributes * (sizeof(uint32_t));

for (i = 0; i < IEEE80211_RADIOTAP_EXT; i++) {
		if ((present & (1<<i)) == 0)
			continue;
		if (items[i].align == 0) {
			/* NB: unidentified element, don't guess */
			printf("%s: unknown item %d\n", __func__, i);
			return -1;
		}
		off = roundup2(off, items[i].align);
		if (i == item) {
			if (off + items[i].width > le16toh(rh->it_len)) {
				/* NB: item does not fit in header data */
				printf("%s: item %d not in header data, "
				    "off %d width %zu len %d\n", __func__, i,
				    off, items[i].width, le16toh(rh->it_len));
				return -1;
			}
			return off;
		}
		off += items[i].width;
	}
	return -1;
}

003 File Manager

Editing: ieee80211_radiotap.c

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