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Pull in net80211/ from FreeBSD. This contains Sam Leffler's

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enhancements to the 802.11 layer, which are necessary for ath(4),
the Atheros-chipset driver.
This commit is contained in:
dyoung 2003-08-30 21:26:03 +00:00
parent 673c04d3d6
commit 40e261aa72
13 changed files with 5828 additions and 0 deletions
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875
sys/net80211/ieee80211.c Normal file
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@ -0,0 +1,875 @@
/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002, 2003 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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: src/sys/net80211/ieee80211.c,v 1.7 2003/08/13 22:09:44 sam Exp $");
/*
* IEEE 802.11 generic handler
*/
#include "opt_inet.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/bus.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <machine/atomic.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_llc.h>
#include <net80211/ieee80211_var.h>
#include <net/bpf.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_ether.h>
#endif
#ifdef IEEE80211_DEBUG
int ieee80211_debug = 0;
SYSCTL_INT(_debug, OID_AUTO, ieee80211, CTLFLAG_RW, &ieee80211_debug,
0, "IEEE 802.11 media debugging printfs");
#endif
static void ieee80211_set11gbasicrates(struct ieee80211_rateset *,
enum ieee80211_phymode);
static const char *ieee80211_phymode_name[] = {
"auto", /* IEEE80211_MODE_AUTO */
"11a", /* IEEE80211_MODE_11A */
"11b", /* IEEE80211_MODE_11B */
"11g", /* IEEE80211_MODE_11G */
"turbo", /* IEEE80211_MODE_TURBO */
};
void
ieee80211_ifattach(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
struct ieee80211_channel *c;
int i;
ether_ifattach(ifp, ic->ic_myaddr);
bpfattach2(ifp, DLT_IEEE802_11,
sizeof(struct ieee80211_frame_addr4), &ic->ic_rawbpf);
ieee80211_crypto_attach(ifp);
/*
* Fill in 802.11 available channel set, mark
* all available channels as active, and pick
* a default channel if not already specified.
*/
memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
ic->ic_modecaps |= 1<<IEEE80211_MODE_AUTO;
for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
c = &ic->ic_channels[i];
if (c->ic_flags) {
/*
* Verify driver passed us valid data.
*/
if (i != ieee80211_chan2ieee(ic, c)) {
if_printf(ifp, "bad channel ignored; "
"freq %u flags %x number %u\n",
c->ic_freq, c->ic_flags, i);
c->ic_flags = 0; /* NB: remove */
continue;
}
setbit(ic->ic_chan_avail, i);
/*
* Identify mode capabilities.
*/
if (IEEE80211_IS_CHAN_A(c))
ic->ic_modecaps |= 1<<IEEE80211_MODE_11A;
if (IEEE80211_IS_CHAN_B(c))
ic->ic_modecaps |= 1<<IEEE80211_MODE_11B;
if (IEEE80211_IS_CHAN_PUREG(c))
ic->ic_modecaps |= 1<<IEEE80211_MODE_11G;
if (IEEE80211_IS_CHAN_T(c))
ic->ic_modecaps |= 1<<IEEE80211_MODE_TURBO;
}
}
/* validate ic->ic_curmode */
if ((ic->ic_modecaps & (1<<ic->ic_curmode)) == 0)
ic->ic_curmode = IEEE80211_MODE_AUTO;
(void) ieee80211_setmode(ic, ic->ic_curmode);
ic->ic_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
if (ic->ic_lintval == 0)
ic->ic_lintval = 100; /* default sleep */
ic->ic_bmisstimeout = 7*ic->ic_lintval; /* default 7 beacons */
ieee80211_node_attach(ifp);
ieee80211_proto_attach(ifp);
}
void
ieee80211_ifdetach(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
ieee80211_proto_detach(ifp);
ieee80211_crypto_detach(ifp);
ieee80211_node_detach(ifp);
ifmedia_removeall(&ic->ic_media);
bpfdetach(ifp);
ether_ifdetach(ifp);
}
/*
* Convert MHz frequency to IEEE channel number.
*/
u_int
ieee80211_mhz2ieee(u_int freq, u_int flags)
{
if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
if (freq == 2484)
return 14;
if (freq < 2484)
return (freq - 2407) / 5;
else
return 15 + ((freq - 2512) / 20);
} else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
return (freq - 5000) / 5;
} else { /* either, guess */
if (freq == 2484)
return 14;
if (freq < 2484)
return (freq - 2407) / 5;
if (freq < 5000)
return 15 + ((freq - 2512) / 20);
return (freq - 5000) / 5;
}
}
/*
* Convert channel to IEEE channel number.
*/
u_int
ieee80211_chan2ieee(struct ieee80211com *ic, struct ieee80211_channel *c)
{
if (ic->ic_channels <= c && c <= &ic->ic_channels[IEEE80211_CHAN_MAX])
return c - ic->ic_channels;
else if (c == IEEE80211_CHAN_ANYC)
return IEEE80211_CHAN_ANY;
else if (c != NULL) {
if_printf(&ic->ic_if, "invalid channel freq %u flags %x\n",
c->ic_freq, c->ic_flags);
return 0; /* XXX */
} else {
if_printf(&ic->ic_if, "invalid channel (NULL)\n");
return 0; /* XXX */
}
}
/*
* Convert IEEE channel number to MHz frequency.
*/
u_int
ieee80211_ieee2mhz(u_int chan, u_int flags)
{
if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
if (chan == 14)
return 2484;
if (chan < 14)
return 2407 + chan*5;
else
return 2512 + ((chan-15)*20);
} else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
return 5000 + (chan*5);
} else { /* either, guess */
if (chan == 14)
return 2484;
if (chan < 14) /* 0-13 */
return 2407 + chan*5;
if (chan < 27) /* 15-26 */
return 2512 + ((chan-15)*20);
return 5000 + (chan*5);
}
}
/*
* Setup the media data structures according to the channel and
* rate tables. This must be called by the driver after
* ieee80211_attach and before most anything else.
*/
void
ieee80211_media_init(struct ifnet *ifp,
ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
{
#define ADD(_ic, _s, _o) \
ifmedia_add(&(_ic)->ic_media, \
IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
struct ieee80211com *ic = (void *)ifp;
struct ifmediareq imr;
int i, j, mode, rate, maxrate, mword, mopt, r;
struct ieee80211_rateset *rs;
struct ieee80211_rateset allrates;
/*
* Do late attach work that must wait for any subclass
* (i.e. driver) work such as overriding methods.
*/
ieee80211_node_lateattach(ifp);
/*
* Fill in media characteristics.
*/
ifmedia_init(&ic->ic_media, 0, media_change, media_stat);
maxrate = 0;
memset(&allrates, 0, sizeof(allrates));
for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_MAX; mode++) {
static const u_int mopts[] = {
IFM_AUTO,
IFM_MAKEMODE(IFM_IEEE80211_11A),
IFM_MAKEMODE(IFM_IEEE80211_11B),
IFM_MAKEMODE(IFM_IEEE80211_11G),
IFM_MAKEMODE(IFM_IEEE80211_11A) | IFM_IEEE80211_TURBO,
};
if ((ic->ic_modecaps & (1<<mode)) == 0)
continue;
mopt = mopts[mode];
ADD(ic, IFM_AUTO, mopt); /* e.g. 11a auto */
if (ic->ic_caps & IEEE80211_C_IBSS)
ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_ADHOC);
if (ic->ic_caps & IEEE80211_C_HOSTAP)
ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_HOSTAP);
if (ic->ic_caps & IEEE80211_C_AHDEMO)
ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
if (ic->ic_caps & IEEE80211_C_MONITOR)
ADD(ic, IFM_AUTO, mopt | IFM_IEEE80211_MONITOR);
if (mode == IEEE80211_MODE_AUTO)
continue;
if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
rs = &ic->ic_sup_rates[mode];
for (i = 0; i < rs->rs_nrates; i++) {
rate = rs->rs_rates[i];
mword = ieee80211_rate2media(ic, rate, mode);
if (mword == 0)
continue;
printf("%s%d%sMbps", (i != 0 ? " " : ""),
(rate & IEEE80211_RATE_VAL) / 2,
((rate & 0x1) != 0 ? ".5" : ""));
ADD(ic, mword, mopt);
if (ic->ic_caps & IEEE80211_C_IBSS)
ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC);
if (ic->ic_caps & IEEE80211_C_HOSTAP)
ADD(ic, mword, mopt | IFM_IEEE80211_HOSTAP);
if (ic->ic_caps & IEEE80211_C_AHDEMO)
ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
if (ic->ic_caps & IEEE80211_C_MONITOR)
ADD(ic, mword, mopt | IFM_IEEE80211_MONITOR);
/*
* Add rate to the collection of all rates.
*/
r = rate & IEEE80211_RATE_VAL;
for (j = 0; j < allrates.rs_nrates; j++)
if (allrates.rs_rates[j] == r)
break;
if (j == allrates.rs_nrates) {
/* unique, add to the set */
allrates.rs_rates[j] = r;
allrates.rs_nrates++;
}
rate = (rate & IEEE80211_RATE_VAL) / 2;
if (rate > maxrate)
maxrate = rate;
}
printf("\n");
}
for (i = 0; i < allrates.rs_nrates; i++) {
mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
IEEE80211_MODE_AUTO);
if (mword == 0)
continue;
mword = IFM_SUBTYPE(mword); /* remove media options */
ADD(ic, mword, 0);
if (ic->ic_caps & IEEE80211_C_IBSS)
ADD(ic, mword, IFM_IEEE80211_ADHOC);
if (ic->ic_caps & IEEE80211_C_HOSTAP)
ADD(ic, mword, IFM_IEEE80211_HOSTAP);
if (ic->ic_caps & IEEE80211_C_AHDEMO)
ADD(ic, mword, IFM_IEEE80211_ADHOC | IFM_FLAG0);
if (ic->ic_caps & IEEE80211_C_MONITOR)
ADD(ic, mword, IFM_IEEE80211_MONITOR);
}
ieee80211_media_status(ifp, &imr);
ifmedia_set(&ic->ic_media, imr.ifm_active);
if (maxrate)
ifp->if_baudrate = IF_Mbps(maxrate);
#undef ADD
}
static int
findrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate)
{
#define IEEERATE(_ic,_m,_i) \
((_ic)->ic_sup_rates[_m].rs_rates[_i] & IEEE80211_RATE_VAL)
int i, nrates = ic->ic_sup_rates[mode].rs_nrates;
for (i = 0; i < nrates; i++)
if (IEEERATE(ic, mode, i) == rate)
return i;
return -1;
#undef IEEERATE
}
/*
* Handle a media change request.
*/
int
ieee80211_media_change(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
struct ifmedia_entry *ime;
enum ieee80211_opmode newopmode;
enum ieee80211_phymode newphymode;
int i, j, newrate, error = 0;
ime = ic->ic_media.ifm_cur;
/*
* First, identify the phy mode.
*/
switch (IFM_MODE(ime->ifm_media)) {
case IFM_IEEE80211_11A:
newphymode = IEEE80211_MODE_11A;
break;
case IFM_IEEE80211_11B:
newphymode = IEEE80211_MODE_11B;
break;
case IFM_IEEE80211_11G:
newphymode = IEEE80211_MODE_11G;
break;
case IFM_AUTO:
newphymode = IEEE80211_MODE_AUTO;
break;
default:
return EINVAL;
}
/*
* Turbo mode is an ``option''. Eventually it
* needs to be applied to 11g too.
*/
if (ime->ifm_media & IFM_IEEE80211_TURBO) {
if (newphymode != IEEE80211_MODE_11A)
return EINVAL;
newphymode = IEEE80211_MODE_TURBO;
}
/*
* Validate requested mode is available.
*/
if ((ic->ic_modecaps & (1<<newphymode)) == 0)
return EINVAL;
/*
* Next, the fixed/variable rate.
*/
i = -1;
if (IFM_SUBTYPE(ime->ifm_media) != IFM_AUTO) {
/*
* Convert media subtype to rate.
*/
newrate = ieee80211_media2rate(ime->ifm_media);
if (newrate == 0)
return EINVAL;
/*
* Check the rate table for the specified/current phy.
*/
if (newphymode == IEEE80211_MODE_AUTO) {
/*
* In autoselect mode search for the rate.
*/
for (j = IEEE80211_MODE_11A;
j < IEEE80211_MODE_MAX; j++) {
if ((ic->ic_modecaps & (1<<j)) == 0)
continue;
i = findrate(ic, j, newrate);
if (i != -1) {
/* lock mode too */
newphymode = j;
break;
}
}
} else {
i = findrate(ic, newphymode, newrate);
}
if (i == -1) /* mode/rate mismatch */
return EINVAL;
}
/* NB: defer rate setting to later */
/*
* Deduce new operating mode but don't install it just yet.
*/
if ((ime->ifm_media & (IFM_IEEE80211_ADHOC|IFM_FLAG0)) ==
(IFM_IEEE80211_ADHOC|IFM_FLAG0))
newopmode = IEEE80211_M_AHDEMO;
else if (ime->ifm_media & IFM_IEEE80211_HOSTAP)
newopmode = IEEE80211_M_HOSTAP;
else if (ime->ifm_media & IFM_IEEE80211_ADHOC)
newopmode = IEEE80211_M_IBSS;
else if (ime->ifm_media & IFM_IEEE80211_MONITOR)
newopmode = IEEE80211_M_MONITOR;
else
newopmode = IEEE80211_M_STA;
/*
* Autoselect doesn't make sense when operating as an AP.
* If no phy mode has been selected, pick one and lock it
* down so rate tables can be used in forming beacon frames
* and the like.
*/
if (newopmode == IEEE80211_M_HOSTAP &&
newphymode == IEEE80211_MODE_AUTO) {
for (j = IEEE80211_MODE_11A; j < IEEE80211_MODE_MAX; j++)
if (ic->ic_modecaps & (1<<j)) {
newphymode = j;
break;
}
}
/*
* Handle phy mode change.
*/
if (ic->ic_curmode != newphymode) { /* change phy mode */
error = ieee80211_setmode(ic, newphymode);
if (error != 0)
return error;
error = ENETRESET;
}
/*
* Committed to changes, install the rate setting.
*/
if (ic->ic_fixed_rate != i) {
ic->ic_fixed_rate = i; /* set fixed tx rate */
error = ENETRESET;
}
/*
* Handle operating mode change.
*/
if (ic->ic_opmode != newopmode) {
ic->ic_opmode = newopmode;
switch (newopmode) {
case IEEE80211_M_AHDEMO:
case IEEE80211_M_HOSTAP:
case IEEE80211_M_STA:
case IEEE80211_M_MONITOR:
ic->ic_flags &= ~IEEE80211_F_IBSSON;
break;
case IEEE80211_M_IBSS:
ic->ic_flags |= IEEE80211_F_IBSSON;
#ifdef notdef
if (ic->ic_curmode == IEEE80211_MODE_11G)
ieee80211_set11gbasicrates(
&ic->ic_suprates[newphymode],
IEEE80211_MODE_11B);
#endif
break;
}
error = ENETRESET;
}
#ifdef notdef
if (error == 0)
ifp->if_baudrate = ifmedia_baudrate(ime->ifm_media);
#endif
return error;
}
void
ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
{
struct ieee80211com *ic = (void *)ifp;
struct ieee80211_node *ni = NULL;
imr->ifm_status = IFM_AVALID;
imr->ifm_active = IFM_IEEE80211;
if (ic->ic_state == IEEE80211_S_RUN)
imr->ifm_status |= IFM_ACTIVE;
imr->ifm_active |= IFM_AUTO;
switch (ic->ic_opmode) {
case IEEE80211_M_STA:
ni = ic->ic_bss;
/* calculate rate subtype */
imr->ifm_active |= ieee80211_rate2media(ic,
ni->ni_rates.rs_rates[ni->ni_txrate], ic->ic_curmode);
break;
case IEEE80211_M_IBSS:
imr->ifm_active |= IFM_IEEE80211_ADHOC;
break;
case IEEE80211_M_AHDEMO:
/* should not come here */
break;
case IEEE80211_M_HOSTAP:
imr->ifm_active |= IFM_IEEE80211_HOSTAP;
break;
case IEEE80211_M_MONITOR:
imr->ifm_active |= IFM_IEEE80211_MONITOR;
break;
}
switch (ic->ic_curmode) {
case IEEE80211_MODE_11A:
imr->ifm_active |= IFM_MAKEMODE(IFM_IEEE80211_11A);
break;
case IEEE80211_MODE_11B:
imr->ifm_active |= IFM_MAKEMODE(IFM_IEEE80211_11B);
break;
case IEEE80211_MODE_11G:
imr->ifm_active |= IFM_MAKEMODE(IFM_IEEE80211_11G);
break;
case IEEE80211_MODE_TURBO:
imr->ifm_active |= IFM_MAKEMODE(IFM_IEEE80211_11A)
| IFM_IEEE80211_TURBO;
break;
}
}
void
ieee80211_watchdog(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
if (ic->ic_mgt_timer && --ic->ic_mgt_timer == 0)
ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
if (ic->ic_inact_timer && --ic->ic_inact_timer == 0)
ieee80211_timeout_nodes(ic);
if (ic->ic_mgt_timer != 0 || ic->ic_inact_timer != 0)
ifp->if_timer = 1;
}
/*
* Mark the basic rates for the 11g rate table based on the
* operating mode. For real 11g we mark all the 11b rates
* and 6, 12, and 24 OFDM. For 11b compatibility we mark only
* 11b rates. There's also a pseudo 11a-mode used to mark only
* the basic OFDM rates.
*/
static void
ieee80211_set11gbasicrates(struct ieee80211_rateset *rs, enum ieee80211_phymode mode)
{
static const struct ieee80211_rateset basic[] = {
{ 3, { 12, 24, 48 } }, /* IEEE80211_MODE_11A */
{ 4, { 2, 4, 11, 22 } }, /* IEEE80211_MODE_11B */
{ 7, { 2, 4, 11, 22, 12, 24, 48 } },/* IEEE80211_MODE_11G */
{ 0 }, /* IEEE80211_MODE_TURBO */
};
int i, j;
for (i = 0; i < rs->rs_nrates; i++) {
rs->rs_rates[i] &= IEEE80211_RATE_VAL;
for (j = 0; j < basic[mode].rs_nrates; j++)
if (basic[mode].rs_rates[j] == rs->rs_rates[i]) {
rs->rs_rates[i] |= IEEE80211_RATE_BASIC;
break;
}
}
}
/*
* Set the current phy mode and recalculate the active channel
* set based on the available channels for this mode. Also
* select a new default/current channel if the current one is
* inappropriate for this mode.
*/
int
ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
{
#define N(a) (sizeof(a) / sizeof(a[0]))
static const u_int chanflags[] = {
0, /* IEEE80211_MODE_AUTO */
IEEE80211_CHAN_A, /* IEEE80211_MODE_11A */
IEEE80211_CHAN_B, /* IEEE80211_MODE_11B */
IEEE80211_CHAN_PUREG, /* IEEE80211_MODE_11G */
IEEE80211_CHAN_T, /* IEEE80211_MODE_TURBO */
};
struct ieee80211_channel *c;
u_int modeflags;
int i;
/* validate new mode */
if ((ic->ic_modecaps & (1<<mode)) == 0) {
IEEE80211_DPRINTF(("%s: mode %u not supported (caps 0x%x)\n",
__func__, mode, ic->ic_modecaps));
return EINVAL;
}
/*
* Verify at least one channel is present in the available
* channel list before committing to the new mode.
*/
KASSERT(mode < N(chanflags), ("Unexpected mode %u\n", mode));
modeflags = chanflags[mode];
for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
c = &ic->ic_channels[i];
if (mode == IEEE80211_MODE_AUTO) {
/* ignore turbo channels for autoselect */
if ((c->ic_flags &~ IEEE80211_CHAN_TURBO) != 0)
break;
} else {
if ((c->ic_flags & modeflags) == modeflags)
break;
}
}
if (i > IEEE80211_CHAN_MAX) {
IEEE80211_DPRINTF(("%s: no channels found for mode %u\n",
__func__, mode));
return EINVAL;
}
/*
* Calculate the active channel set.
*/
memset(ic->ic_chan_active, 0, sizeof(ic->ic_chan_active));
for (i = 0; i <= IEEE80211_CHAN_MAX; i++) {
c = &ic->ic_channels[i];
if (mode == IEEE80211_MODE_AUTO) {
/* take anything but pure turbo channels */
if ((c->ic_flags &~ IEEE80211_CHAN_TURBO) != 0)
setbit(ic->ic_chan_active, i);
} else {
if ((c->ic_flags & modeflags) == modeflags)
setbit(ic->ic_chan_active, i);
}
}
/*
* If no current/default channel is setup or the current
* channel is wrong for the mode then pick the first
* available channel from the active list. This is likely
* not the right one.
*/
if (ic->ic_ibss_chan == NULL ||
isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ic->ic_ibss_chan))) {
for (i = 0; i <= IEEE80211_CHAN_MAX; i++)
if (isset(ic->ic_chan_active, i)) {
ic->ic_ibss_chan = &ic->ic_channels[i];
break;
}
}
/*
* Set/reset state flags that influence beacon contents, etc.
*
* XXX what if we have stations already associated???
* XXX probably not right for autoselect?
*/
if (mode == IEEE80211_MODE_11G) {
if (ic->ic_caps & IEEE80211_C_SHSLOT)
ic->ic_flags |= IEEE80211_F_SHSLOT;
if (ic->ic_caps & IEEE80211_C_SHPREAMBLE)
ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
ieee80211_set11gbasicrates(&ic->ic_sup_rates[mode],
IEEE80211_MODE_11G);
} else {
ic->ic_flags &= ~(IEEE80211_F_SHSLOT | IEEE80211_F_SHPREAMBLE);
}
ic->ic_curmode = mode;
return 0;
#undef N
}
/*
* Return the phy mode for with the specified channel so the
* caller can select a rate set. This is problematic and the
* work here assumes how things work elsewhere in this code.
*/
enum ieee80211_phymode
ieee80211_chan2mode(struct ieee80211com *ic, struct ieee80211_channel *chan)
{
/*
* NB: this assumes the channel would not be supplied to us
* unless it was already compatible with the current mode.
*/
if (ic->ic_curmode != IEEE80211_MODE_AUTO)
return ic->ic_curmode;
/*
* In autoselect mode; deduce a mode based on the channel
* characteristics. We assume that turbo-only channels
* are not considered when the channel set is constructed.
*/
if (IEEE80211_IS_CHAN_5GHZ(chan))
return IEEE80211_MODE_11A;
else if (chan->ic_flags & (IEEE80211_CHAN_OFDM|IEEE80211_CHAN_DYN))
return IEEE80211_MODE_11G;
else
return IEEE80211_MODE_11B;
}
/*
* convert IEEE80211 rate value to ifmedia subtype.
* ieee80211 rate is in unit of 0.5Mbps.
*/
int
ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
{
#define N(a) (sizeof(a) / sizeof(a[0]))
static const struct {
u_int m; /* rate + mode */
u_int r; /* if_media rate */
} rates[] = {
{ 2 | IFM_MAKEMODE(IFM_IEEE80211_11B), IFM_IEEE80211_DS1 },
{ 4 | IFM_MAKEMODE(IFM_IEEE80211_11B), IFM_IEEE80211_DS2 },
{ 11 | IFM_MAKEMODE(IFM_IEEE80211_11B), IFM_IEEE80211_DS5 },
{ 22 | IFM_MAKEMODE(IFM_IEEE80211_11B), IFM_IEEE80211_DS11 },
{ 44 | IFM_MAKEMODE(IFM_IEEE80211_11B), IFM_IEEE80211_DS22 },
{ 12 | IFM_MAKEMODE(IFM_IEEE80211_11A), IFM_IEEE80211_OFDM6 },
{ 18 | IFM_MAKEMODE(IFM_IEEE80211_11A), IFM_IEEE80211_OFDM9 },
{ 24 | IFM_MAKEMODE(IFM_IEEE80211_11A), IFM_IEEE80211_OFDM12 },
{ 36 | IFM_MAKEMODE(IFM_IEEE80211_11A), IFM_IEEE80211_OFDM18 },
{ 48 | IFM_MAKEMODE(IFM_IEEE80211_11A), IFM_IEEE80211_OFDM24 },
{ 72 | IFM_MAKEMODE(IFM_IEEE80211_11A), IFM_IEEE80211_OFDM36 },
{ 96 | IFM_MAKEMODE(IFM_IEEE80211_11A), IFM_IEEE80211_OFDM48 },
{ 108 | IFM_MAKEMODE(IFM_IEEE80211_11A), IFM_IEEE80211_OFDM54 },
{ 2 | IFM_MAKEMODE(IFM_IEEE80211_11G), IFM_IEEE80211_DS1 },
{ 4 | IFM_MAKEMODE(IFM_IEEE80211_11G), IFM_IEEE80211_DS2 },
{ 11 | IFM_MAKEMODE(IFM_IEEE80211_11G), IFM_IEEE80211_DS5 },
{ 22 | IFM_MAKEMODE(IFM_IEEE80211_11G), IFM_IEEE80211_DS11 },
{ 12 | IFM_MAKEMODE(IFM_IEEE80211_11G), IFM_IEEE80211_OFDM6 },
{ 18 | IFM_MAKEMODE(IFM_IEEE80211_11G), IFM_IEEE80211_OFDM9 },
{ 24 | IFM_MAKEMODE(IFM_IEEE80211_11G), IFM_IEEE80211_OFDM12 },
{ 36 | IFM_MAKEMODE(IFM_IEEE80211_11G), IFM_IEEE80211_OFDM18 },
{ 48 | IFM_MAKEMODE(IFM_IEEE80211_11G), IFM_IEEE80211_OFDM24 },
{ 72 | IFM_MAKEMODE(IFM_IEEE80211_11G), IFM_IEEE80211_OFDM36 },
{ 96 | IFM_MAKEMODE(IFM_IEEE80211_11G), IFM_IEEE80211_OFDM48 },
{ 108 | IFM_MAKEMODE(IFM_IEEE80211_11G), IFM_IEEE80211_OFDM54 },
/* NB: OFDM72 doesn't realy exist so we don't handle it */
};
u_int mask, i;
mask = rate & IEEE80211_RATE_VAL;
switch (mode) {
case IEEE80211_MODE_11A:
case IEEE80211_MODE_TURBO:
mask |= IFM_MAKEMODE(IFM_IEEE80211_11A);
break;
case IEEE80211_MODE_11B:
mask |= IFM_MAKEMODE(IFM_IEEE80211_11B);
break;
case IEEE80211_MODE_AUTO:
/* NB: ic may be NULL for some drivers */
if (ic && ic->ic_phytype == IEEE80211_T_FH) {
/* must handle these specially */
switch (mask) {
case 2: return IFM_IEEE80211_FH1;
case 4: return IFM_IEEE80211_FH2;
}
return IFM_AUTO;
}
/* NB: hack, 11g matches both 11b+11a rates */
/* fall thru... */
case IEEE80211_MODE_11G:
mask |= IFM_MAKEMODE(IFM_IEEE80211_11G);
break;
}
for (i = 0; i < N(rates); i++)
if (rates[i].m == mask)
return rates[i].r;
return IFM_AUTO;
#undef N
}
int
ieee80211_media2rate(int mword)
{
#define N(a) (sizeof(a) / sizeof(a[0]))
static const int ieeerates[] = {
-1, /* IFM_AUTO */
0, /* IFM_MANUAL */
0, /* IFM_NONE */
2, /* IFM_IEEE80211_FH1 */
4, /* IFM_IEEE80211_FH2 */
2, /* IFM_IEEE80211_DS1 */
4, /* IFM_IEEE80211_DS2 */
11, /* IFM_IEEE80211_DS5 */
22, /* IFM_IEEE80211_DS11 */
44, /* IFM_IEEE80211_DS22 */
12, /* IFM_IEEE80211_OFDM6 */
18, /* IFM_IEEE80211_OFDM9 */
24, /* IFM_IEEE80211_OFDM12 */
36, /* IFM_IEEE80211_OFDM18 */
48, /* IFM_IEEE80211_OFDM24 */
72, /* IFM_IEEE80211_OFDM36 */
96, /* IFM_IEEE80211_OFDM48 */
108, /* IFM_IEEE80211_OFDM54 */
144, /* IFM_IEEE80211_OFDM72 */
};
return IFM_SUBTYPE(mword) < N(ieeerates) ?
ieeerates[IFM_SUBTYPE(mword)] : 0;
#undef N
}
/*
* Module glue.
*
* NB: the module name is "wlan" for compatibility with NetBSD.
*/
static int
ieee80211_modevent(module_t mod, int type, void *unused)
{
switch (type) {
case MOD_LOAD:
if (bootverbose)
printf("wlan: <802.11 Link Layer>\n");
return 0;
case MOD_UNLOAD:
return 0;
}
return EINVAL;
}
static moduledata_t ieee80211_mod = {
"wlan",
ieee80211_modevent,
0
};
DECLARE_MODULE(wlan, ieee80211_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST);
MODULE_VERSION(wlan, 1);
MODULE_DEPEND(wlan, rc4, 1, 1, 1);

332
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/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002, 2003 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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.
*
* $FreeBSD: src/sys/net80211/ieee80211.h,v 1.2 2003/06/27 05:13:52 sam Exp $
*/
#ifndef _NET80211_IEEE80211_H_
#define _NET80211_IEEE80211_H_
/*
* 802.11 protocol definitions.
*/
#define IEEE80211_ADDR_LEN 6 /* size of 802.11 address */
/* is 802.11 address multicast/broadcast? */
#define IEEE80211_IS_MULTICAST(_a) (*(_a) & 0x01)
/* IEEE 802.11 PLCP header */
struct ieee80211_plcp_hdr {
u_int16_t i_sfd;
u_int8_t i_signal;
u_int8_t i_service;
u_int16_t i_length;
u_int16_t i_crc;
} __attribute__((__packed__));
/*
* generic definitions for IEEE 802.11 frames
*/
struct ieee80211_frame {
u_int8_t i_fc[2];
u_int8_t i_dur[2];
u_int8_t i_addr1[IEEE80211_ADDR_LEN];
u_int8_t i_addr2[IEEE80211_ADDR_LEN];
u_int8_t i_addr3[IEEE80211_ADDR_LEN];
u_int8_t i_seq[2];
/* possibly followed by addr4[IEEE80211_ADDR_LEN]; */
/* see below */
} __attribute__((__packed__));
struct ieee80211_frame_addr4 {
u_int8_t i_fc[2];
u_int8_t i_dur[2];
u_int8_t i_addr1[IEEE80211_ADDR_LEN];
u_int8_t i_addr2[IEEE80211_ADDR_LEN];
u_int8_t i_addr3[IEEE80211_ADDR_LEN];
u_int8_t i_seq[2];
u_int8_t i_addr4[IEEE80211_ADDR_LEN];
} __attribute__((__packed__));
#define IEEE80211_FC0_VERSION_MASK 0x03
#define IEEE80211_FC0_VERSION_SHIFT 0
#define IEEE80211_FC0_VERSION_0 0x00
#define IEEE80211_FC0_TYPE_MASK 0x0c
#define IEEE80211_FC0_TYPE_SHIFT 2
#define IEEE80211_FC0_TYPE_MGT 0x00
#define IEEE80211_FC0_TYPE_CTL 0x04
#define IEEE80211_FC0_TYPE_DATA 0x08
#define IEEE80211_FC0_SUBTYPE_MASK 0xf0
#define IEEE80211_FC0_SUBTYPE_SHIFT 4
/* for TYPE_MGT */
#define IEEE80211_FC0_SUBTYPE_ASSOC_REQ 0x00
#define IEEE80211_FC0_SUBTYPE_ASSOC_RESP 0x10
#define IEEE80211_FC0_SUBTYPE_REASSOC_REQ 0x20
#define IEEE80211_FC0_SUBTYPE_REASSOC_RESP 0x30
#define IEEE80211_FC0_SUBTYPE_PROBE_REQ 0x40
#define IEEE80211_FC0_SUBTYPE_PROBE_RESP 0x50
#define IEEE80211_FC0_SUBTYPE_BEACON 0x80
#define IEEE80211_FC0_SUBTYPE_ATIM 0x90
#define IEEE80211_FC0_SUBTYPE_DISASSOC 0xa0
#define IEEE80211_FC0_SUBTYPE_AUTH 0xb0
#define IEEE80211_FC0_SUBTYPE_DEAUTH 0xc0
/* for TYPE_CTL */
#define IEEE80211_FC0_SUBTYPE_PS_POLL 0xa0
#define IEEE80211_FC0_SUBTYPE_RTS 0xb0
#define IEEE80211_FC0_SUBTYPE_CTS 0xc0
#define IEEE80211_FC0_SUBTYPE_ACK 0xd0
#define IEEE80211_FC0_SUBTYPE_CF_END 0xe0
#define IEEE80211_FC0_SUBTYPE_CF_END_ACK 0xf0
/* for TYPE_DATA (bit combination) */
#define IEEE80211_FC0_SUBTYPE_DATA 0x00
#define IEEE80211_FC0_SUBTYPE_CF_ACK 0x10
#define IEEE80211_FC0_SUBTYPE_CF_POLL 0x20
#define IEEE80211_FC0_SUBTYPE_CF_ACPL 0x30
#define IEEE80211_FC0_SUBTYPE_NODATA 0x40
#define IEEE80211_FC0_SUBTYPE_CFACK 0x50
#define IEEE80211_FC0_SUBTYPE_CFPOLL 0x60
#define IEEE80211_FC0_SUBTYPE_CF_ACK_CF_ACK 0x70
#define IEEE80211_FC1_DIR_MASK 0x03
#define IEEE80211_FC1_DIR_NODS 0x00 /* STA->STA */
#define IEEE80211_FC1_DIR_TODS 0x01 /* STA->AP */
#define IEEE80211_FC1_DIR_FROMDS 0x02 /* AP ->STA */
#define IEEE80211_FC1_DIR_DSTODS 0x03 /* AP ->AP */
#define IEEE80211_FC1_MORE_FRAG 0x04
#define IEEE80211_FC1_RETRY 0x08
#define IEEE80211_FC1_PWR_MGT 0x10
#define IEEE80211_FC1_MORE_DATA 0x20
#define IEEE80211_FC1_WEP 0x40
#define IEEE80211_FC1_ORDER 0x80
#define IEEE80211_SEQ_FRAG_MASK 0x000f
#define IEEE80211_SEQ_FRAG_SHIFT 0
#define IEEE80211_SEQ_SEQ_MASK 0xfff0
#define IEEE80211_SEQ_SEQ_SHIFT 4
#define IEEE80211_NWID_LEN 32
/*
* BEACON management packets
*
* octet timestamp[8]
* octet beacon interval[2]
* octet capability information[2]
* information element
* octet elemid
* octet length
* octet information[length]
*/
typedef uint8_t *ieee80211_mgt_beacon_t;
#define IEEE80211_BEACON_INTERVAL(beacon) \
((beacon)[8] | ((beacon)[9] << 8))
#define IEEE80211_BEACON_CAPABILITY(beacon) \
((beacon)[10] | ((beacon)[11] << 8))
#define IEEE80211_CAPINFO_ESS 0x0001
#define IEEE80211_CAPINFO_IBSS 0x0002
#define IEEE80211_CAPINFO_CF_POLLABLE 0x0004
#define IEEE80211_CAPINFO_CF_POLLREQ 0x0008
#define IEEE80211_CAPINFO_PRIVACY 0x0010
#define IEEE80211_CAPINFO_SHORT_PREAMBLE 0x0020
#define IEEE80211_CAPINFO_PBCC 0x0040
#define IEEE80211_CAPINFO_CHNL_AGILITY 0x0080
/* bits 8-9 are reserved */
#define IEEE80211_CAPINFO_SHORT_SLOTTIME 0x0400
/* bits 11-12 are reserved */
#define IEEE80211_CAPINFO_DSSSOFDM 0x2000
/* bits 14-15 are reserved */
/*
* Management information elements
*/
struct ieee80211_information {
char ssid[IEEE80211_NWID_LEN+1];
struct rates {
u_int8_t *p;
} rates;
struct fh {
u_int16_t dwell;
u_int8_t set;
u_int8_t pattern;
u_int8_t index;
} fh;
struct ds {
u_int8_t channel;
} ds;
struct cf {
u_int8_t count;
u_int8_t period;
u_int8_t maxdur[2];
u_int8_t dur[2];
} cf;
struct tim {
u_int8_t count;
u_int8_t period;
u_int8_t bitctl;
/* u_int8_t pvt[251]; The driver needs to use this. */
} tim;
struct ibss {
u_int16_t atim;
} ibss;
struct challenge {
u_int8_t *p;
u_int8_t len;
} challenge;
struct erp {
u_int8_t flags;
} erp;
};
enum {
IEEE80211_ELEMID_SSID = 0,
IEEE80211_ELEMID_RATES = 1,
IEEE80211_ELEMID_FHPARMS = 2,
IEEE80211_ELEMID_DSPARMS = 3,
IEEE80211_ELEMID_CFPARMS = 4,
IEEE80211_ELEMID_TIM = 5,
IEEE80211_ELEMID_IBSSPARMS = 6,
IEEE80211_ELEMID_COUNTRY = 7,
IEEE80211_ELEMID_CHALLENGE = 16,
IEEE80211_ELEMID_ERP = 42,
IEEE80211_ELEMID_XRATES = 50,
};
#define IEEE80211_RATE_BASIC 0x80
#define IEEE80211_RATE_VAL 0x7f
/* EPR information element flags */
#define IEEE80211_ERP_NON_ERP_PRESENT 0x01
#define IEEE80211_ERP_USE_PROTECTION 0x02
#define IEEE80211_ERP_BARKER_MODE 0x04
/*
* AUTH management packets
*
* octet algo[2]
* octet seq[2]
* octet status[2]
* octet chal.id
* octet chal.length
* octet chal.text[253]
*/
typedef u_int8_t *ieee80211_mgt_auth_t;
#define IEEE80211_AUTH_ALGORITHM(auth) \
((auth)[0] | ((auth)[1] << 8))
#define IEEE80211_AUTH_TRANSACTION(auth) \
((auth)[2] | ((auth)[3] << 8))
#define IEEE80211_AUTH_STATUS(auth) \
((auth)[4] | ((auth)[5] << 8))
#define IEEE80211_AUTH_ALG_OPEN 0x0000
#define IEEE80211_AUTH_ALG_SHARED 0x0001
enum {
IEEE80211_AUTH_OPEN_REQUEST = 1,
IEEE80211_AUTH_OPEN_RESPONSE = 2,
};
enum {
IEEE80211_AUTH_SHARED_REQUEST = 1,
IEEE80211_AUTH_SHARED_CHALLENGE = 2,
IEEE80211_AUTH_SHARED_RESPONSE = 3,
IEEE80211_AUTH_SHARED_PASS = 4,
};
/*
* Reason codes
*
* Unlisted codes are reserved
*/
enum {
IEEE80211_REASON_UNSPECIFIED = 1,
IEEE80211_REASON_AUTH_EXPIRE = 2,
IEEE80211_REASON_AUTH_LEAVE = 3,
IEEE80211_REASON_ASSOC_EXPIRE = 4,
IEEE80211_REASON_ASSOC_TOOMANY = 5,
IEEE80211_REASON_NOT_AUTHED = 6,
IEEE80211_REASON_NOT_ASSOCED = 7,
IEEE80211_REASON_ASSOC_LEAVE = 8,
IEEE80211_REASON_ASSOC_NOT_AUTHED = 9,
IEEE80211_STATUS_SUCCESS = 0,
IEEE80211_STATUS_UNSPECIFIED = 1,
IEEE80211_STATUS_CAPINFO = 10,
IEEE80211_STATUS_NOT_ASSOCED = 11,
IEEE80211_STATUS_OTHER = 12,
IEEE80211_STATUS_ALG = 13,
IEEE80211_STATUS_SEQUENCE = 14,
IEEE80211_STATUS_CHALLENGE = 15,
IEEE80211_STATUS_TIMEOUT = 16,
IEEE80211_STATUS_TOOMANY = 17,
IEEE80211_STATUS_BASIC_RATE = 18,
IEEE80211_STATUS_SP_REQUIRED = 19,
IEEE80211_STATUS_PBCC_REQUIRED = 20,
IEEE80211_STATUS_CA_REQUIRED = 21,
IEEE80211_STATUS_TOO_MANY_STATIONS = 22,
IEEE80211_STATUS_RATES = 23,
IEEE80211_STATUS_SHORTSLOT_REQUIRED = 25,
IEEE80211_STATUS_DSSSOFDM_REQUIRED = 26,
};
#define IEEE80211_WEP_KEYLEN 5 /* 40bit */
#define IEEE80211_WEP_IVLEN 3 /* 24bit */
#define IEEE80211_WEP_KIDLEN 1 /* 1 octet */
#define IEEE80211_WEP_CRCLEN 4 /* CRC-32 */
#define IEEE80211_WEP_NKID 4 /* number of key ids */
#define IEEE80211_CRC_LEN 4
#define IEEE80211_MTU 1500
#define IEEE80211_MAX_LEN (2300 + IEEE80211_CRC_LEN + \
(IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + IEEE80211_WEP_CRCLEN))
/*
* RTS frame length parameters. The default is specified in
* the 802.11 spec. The max may be wrong for jumbo frames.
*/
#define IEEE80211_RTS_DEFAULT 512
#define IEEE80211_RTS_MIN 1
#define IEEE80211_RTS_MAX IEEE80211_MAX_LEN
enum {
IEEE80211_AUTH_NONE = 0,
IEEE80211_AUTH_OPEN = 1,
IEEE80211_AUTH_SHARED = 2,
};
#endif /* _NET80211_IEEE80211_H_ */

307
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/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002, 2003 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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: src/sys/net80211/ieee80211_crypto.c,v 1.2 2003/06/27 05:13:52 sam Exp $");
#include "opt_inet.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/bus.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <machine/atomic.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_llc.h>
#include <net80211/ieee80211_var.h>
#include <net/bpf.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_ether.h>
#endif
#include <crypto/rc4/rc4.h>
#define arc4_ctxlen() sizeof (struct rc4_state)
#define arc4_setkey(_c,_k,_l) rc4_init(_c,_k,_l)
#define arc4_encrypt(_c,_d,_s,_l) rc4_crypt(_c,_s,_d,_l)
static void ieee80211_crc_init(void);
static u_int32_t ieee80211_crc_update(u_int32_t crc, u_int8_t *buf, int len);
void
ieee80211_crypto_attach(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
/*
* Setup crypto support.
*/
ieee80211_crc_init();
ic->ic_iv = arc4random();
}
void
ieee80211_crypto_detach(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
if (ic->ic_wep_ctx != NULL) {
free(ic->ic_wep_ctx, M_DEVBUF);
ic->ic_wep_ctx = NULL;
}
}
struct mbuf *
ieee80211_wep_crypt(struct ifnet *ifp, struct mbuf *m0, int txflag)
{
struct ieee80211com *ic = (void *)ifp;
struct mbuf *m, *n, *n0;
struct ieee80211_frame *wh;
int i, left, len, moff, noff, kid;
u_int32_t iv, crc;
u_int8_t *ivp;
void *ctx;
u_int8_t keybuf[IEEE80211_WEP_IVLEN + IEEE80211_KEYBUF_SIZE];
u_int8_t crcbuf[IEEE80211_WEP_CRCLEN];
n0 = NULL;
if ((ctx = ic->ic_wep_ctx) == NULL) {
ctx = malloc(arc4_ctxlen(), M_DEVBUF, M_NOWAIT);
if (ctx == NULL)
goto fail;
ic->ic_wep_ctx = ctx;
}
m = m0;
left = m->m_pkthdr.len;
MGET(n, M_DONTWAIT, m->m_type);
n0 = n;
if (n == NULL)
goto fail;
M_MOVE_PKTHDR(n, m);
len = IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + IEEE80211_WEP_CRCLEN;
if (txflag) {
n->m_pkthdr.len += len;
} else {
n->m_pkthdr.len -= len;
left -= len;
}
n->m_len = MHLEN;
if (n->m_pkthdr.len >= MINCLSIZE) {
MCLGET(n, M_DONTWAIT);
if (n->m_flags & M_EXT)
n->m_len = n->m_ext.ext_size;
}
len = sizeof(struct ieee80211_frame);
memcpy(mtod(n, caddr_t), mtod(m, caddr_t), len);
wh = mtod(n, struct ieee80211_frame *);
left -= len;
moff = len;
noff = len;
if (txflag) {
kid = ic->ic_wep_txkey;
wh->i_fc[1] |= IEEE80211_FC1_WEP;
iv = ic->ic_iv;
/*
* Skip 'bad' IVs from Fluhrer/Mantin/Shamir:
* (B, 255, N) with 3 <= B < 8
*/
if (iv >= 0x03ff00 &&
(iv & 0xf8ff00) == 0x00ff00)
iv += 0x000100;
ic->ic_iv = iv + 1;
/* put iv in little endian to prepare 802.11i */
ivp = mtod(n, u_int8_t *) + noff;
for (i = 0; i < IEEE80211_WEP_IVLEN; i++) {
ivp[i] = iv & 0xff;
iv >>= 8;
}
ivp[IEEE80211_WEP_IVLEN] = kid << 6; /* pad and keyid */
noff += IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN;
} else {
wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
ivp = mtod(m, u_int8_t *) + moff;
kid = ivp[IEEE80211_WEP_IVLEN] >> 6;
moff += IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN;
}
memcpy(keybuf, ivp, IEEE80211_WEP_IVLEN);
memcpy(keybuf + IEEE80211_WEP_IVLEN, ic->ic_nw_keys[kid].wk_key,
ic->ic_nw_keys[kid].wk_len);
arc4_setkey(ctx, keybuf,
IEEE80211_WEP_IVLEN + ic->ic_nw_keys[kid].wk_len);
/* encrypt with calculating CRC */
crc = ~0;
while (left > 0) {
len = m->m_len - moff;
if (len == 0) {
m = m->m_next;
moff = 0;
continue;
}
if (len > n->m_len - noff) {
len = n->m_len - noff;
if (len == 0) {
MGET(n->m_next, M_DONTWAIT, n->m_type);
if (n->m_next == NULL)
goto fail;
n = n->m_next;
n->m_len = MLEN;
if (left >= MINCLSIZE) {
MCLGET(n, M_DONTWAIT);
if (n->m_flags & M_EXT)
n->m_len = n->m_ext.ext_size;
}
noff = 0;
continue;
}
}
if (len > left)
len = left;
arc4_encrypt(ctx, mtod(n, caddr_t) + noff,
mtod(m, caddr_t) + moff, len);
if (txflag)
crc = ieee80211_crc_update(crc,
mtod(m, u_int8_t *) + moff, len);
else
crc = ieee80211_crc_update(crc,
mtod(n, u_int8_t *) + noff, len);
left -= len;
moff += len;
noff += len;
}
crc = ~crc;
if (txflag) {
*(u_int32_t *)crcbuf = htole32(crc);
if (n->m_len >= noff + sizeof(crcbuf))
n->m_len = noff + sizeof(crcbuf);
else {
n->m_len = noff;
MGET(n->m_next, M_DONTWAIT, n->m_type);
if (n->m_next == NULL)
goto fail;
n = n->m_next;
n->m_len = sizeof(crcbuf);
noff = 0;
}
arc4_encrypt(ctx, mtod(n, caddr_t) + noff, crcbuf,
sizeof(crcbuf));
} else {
n->m_len = noff;
for (noff = 0; noff < sizeof(crcbuf); noff += len) {
len = sizeof(crcbuf) - noff;
if (len > m->m_len - moff)
len = m->m_len - moff;
if (len > 0)
arc4_encrypt(ctx, crcbuf + noff,
mtod(m, caddr_t) + moff, len);
m = m->m_next;
moff = 0;
}
if (crc != le32toh(*(u_int32_t *)crcbuf)) {
#ifdef IEEE80211_DEBUG
if (ieee80211_debug) {
if_printf(ifp, "decrypt CRC error\n");
if (ieee80211_debug > 1)
ieee80211_dump_pkt(n0->m_data,
n0->m_len, -1, -1);
}
#endif
goto fail;
}
}
m_freem(m0);
return n0;
fail:
m_freem(m0);
m_freem(n0);
return NULL;
}
/*
* CRC 32 -- routine from RFC 2083
*/
/* Table of CRCs of all 8-bit messages */
static u_int32_t ieee80211_crc_table[256];
/* Make the table for a fast CRC. */
static void
ieee80211_crc_init(void)
{
u_int32_t c;
int n, k;
for (n = 0; n < 256; n++) {
c = (u_int32_t)n;
for (k = 0; k < 8; k++) {
if (c & 1)
c = 0xedb88320UL ^ (c >> 1);
else
c = c >> 1;
}
ieee80211_crc_table[n] = c;
}
}
/*
* Update a running CRC with the bytes buf[0..len-1]--the CRC
* should be initialized to all 1's, and the transmitted value
* is the 1's complement of the final running CRC
*/
static u_int32_t
ieee80211_crc_update(u_int32_t crc, u_int8_t *buf, int len)
{
u_int8_t *endbuf;
for (endbuf = buf + len; buf < endbuf; buf++)
crc = ieee80211_crc_table[(crc ^ *buf) & 0xff] ^ (crc >> 8);
return crc;
}

50
sys/net80211/ieee80211_crypto.h Normal file
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@ -0,0 +1,50 @@
/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002, 2003 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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.
*
* $FreeBSD: src/sys/net80211/ieee80211_crypto.h,v 1.2 2003/06/27 05:13:52 sam Exp $
*/
#ifndef _NET80211_IEEE80211_CRYPTO_H_
#define _NET80211_IEEE80211_CRYPTO_H_
/*
* 802.11 protocol crypto-related definitions.
*/
#define IEEE80211_KEYBUF_SIZE 16
struct ieee80211_wepkey {
int wk_len;
u_int8_t wk_key[IEEE80211_KEYBUF_SIZE];
};
extern void ieee80211_crypto_attach(struct ifnet *);
extern void ieee80211_crypto_detach(struct ifnet *);
extern struct mbuf *ieee80211_wep_crypt(struct ifnet *, struct mbuf *, int);
#endif /* _NET80211_IEEE80211_CRYPTO_H_ */

1078
sys/net80211/ieee80211_input.c Normal file
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988
sys/net80211/ieee80211_ioctl.c Normal file
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@ -0,0 +1,988 @@
/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002, 2003 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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: src/sys/net80211/ieee80211_ioctl.c,v 1.4 2003/07/20 21:36:08 sam Exp $");
/*
* IEEE 802.11 ioctl support (FreeBSD-specific)
*/
#include <sys/endian.h>
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/systm.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/if_media.h>
#include <net/ethernet.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_ioctl.h>
#include <dev/wi/if_wavelan_ieee.h>
/*
* XXX
* Wireless LAN specific configuration interface, which is compatible
* with wicontrol(8).
*/
int
ieee80211_cfgget(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct ieee80211com *ic = (void *)ifp;
int i, j, error;
struct ifreq *ifr = (struct ifreq *)data;
struct wi_req wreq;
struct wi_ltv_keys *keys;
struct wi_apinfo *ap;
struct ieee80211_node *ni;
struct ieee80211_rateset *rs;
struct wi_sigcache wsc;
struct wi_scan_p2_hdr *p2;
struct wi_scan_res *res;
error = copyin(ifr->ifr_data, &wreq, sizeof(wreq));
if (error)
return error;
wreq.wi_len = 0;
switch (wreq.wi_type) {
case WI_RID_SERIALNO:
/* nothing appropriate */
break;
case WI_RID_NODENAME:
strcpy((char *)&wreq.wi_val[1], hostname);
wreq.wi_val[0] = htole16(strlen(hostname));
wreq.wi_len = (1 + strlen(hostname) + 1) / 2;
break;
case WI_RID_CURRENT_SSID:
if (ic->ic_state != IEEE80211_S_RUN) {
wreq.wi_val[0] = 0;
wreq.wi_len = 1;
break;
}
wreq.wi_val[0] = htole16(ic->ic_bss->ni_esslen);
memcpy(&wreq.wi_val[1], ic->ic_bss->ni_essid,
ic->ic_bss->ni_esslen);
wreq.wi_len = (1 + ic->ic_bss->ni_esslen + 1) / 2;
break;
case WI_RID_OWN_SSID:
case WI_RID_DESIRED_SSID:
wreq.wi_val[0] = htole16(ic->ic_des_esslen);
memcpy(&wreq.wi_val[1], ic->ic_des_essid, ic->ic_des_esslen);
wreq.wi_len = (1 + ic->ic_des_esslen + 1) / 2;
break;
case WI_RID_CURRENT_BSSID:
if (ic->ic_state == IEEE80211_S_RUN)
IEEE80211_ADDR_COPY(wreq.wi_val, ic->ic_bss->ni_bssid);
else
memset(wreq.wi_val, 0, IEEE80211_ADDR_LEN);
wreq.wi_len = IEEE80211_ADDR_LEN / 2;
break;
case WI_RID_CHANNEL_LIST:
memset(wreq.wi_val, 0, sizeof(wreq.wi_val));
/*
* Since channel 0 is not available for DS, channel 1
* is assigned to LSB on WaveLAN.
*/
if (ic->ic_phytype == IEEE80211_T_DS)
i = 1;
else
i = 0;
for (j = 0; i <= IEEE80211_CHAN_MAX; i++, j++)
if (isset(ic->ic_chan_active, i)) {
setbit((u_int8_t *)wreq.wi_val, j);
wreq.wi_len = j / 16 + 1;
}
break;
case WI_RID_OWN_CHNL:
wreq.wi_val[0] = htole16(
ieee80211_chan2ieee(ic, ic->ic_ibss_chan));
wreq.wi_len = 1;
break;
case WI_RID_CURRENT_CHAN:
wreq.wi_val[0] = htole16(
ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan));
wreq.wi_len = 1;
break;
case WI_RID_COMMS_QUALITY:
wreq.wi_val[0] = 0; /* quality */
wreq.wi_val[1] = htole16(ic->ic_bss->ni_rssi); /* signal */
wreq.wi_val[2] = 0; /* noise */
wreq.wi_len = 3;
break;
case WI_RID_PROMISC:
wreq.wi_val[0] = htole16((ifp->if_flags & IFF_PROMISC) ? 1 : 0);
wreq.wi_len = 1;
break;
case WI_RID_PORTTYPE:
wreq.wi_val[0] = htole16(ic->ic_opmode);
wreq.wi_len = 1;
break;
case WI_RID_MAC_NODE:
IEEE80211_ADDR_COPY(wreq.wi_val, ic->ic_myaddr);
wreq.wi_len = IEEE80211_ADDR_LEN / 2;
break;
case WI_RID_TX_RATE:
if (ic->ic_fixed_rate == -1)
wreq.wi_val[0] = 0; /* auto */
else
wreq.wi_val[0] = htole16(
(ic->ic_sup_rates[ic->ic_curmode].rs_rates[ic->ic_fixed_rate] &
IEEE80211_RATE_VAL) / 2);
wreq.wi_len = 1;
break;
case WI_RID_CUR_TX_RATE:
wreq.wi_val[0] = htole16(
(ic->ic_bss->ni_rates.rs_rates[ic->ic_bss->ni_txrate] &
IEEE80211_RATE_VAL) / 2);
wreq.wi_len = 1;
break;
case WI_RID_RTS_THRESH:
wreq.wi_val[0] = htole16(ic->ic_rtsthreshold);
wreq.wi_len = 1;
break;
case WI_RID_CREATE_IBSS:
wreq.wi_val[0] =
htole16((ic->ic_flags & IEEE80211_F_IBSSON) ? 1 : 0);
wreq.wi_len = 1;
break;
case WI_RID_MICROWAVE_OVEN:
wreq.wi_val[0] = 0; /* no ... not supported */
wreq.wi_len = 1;
break;
case WI_RID_ROAMING_MODE:
wreq.wi_val[0] = htole16(1); /* enabled ... not supported */
wreq.wi_len = 1;
break;
case WI_RID_SYSTEM_SCALE:
wreq.wi_val[0] = htole16(1); /* low density ... not supp */
wreq.wi_len = 1;
break;
case WI_RID_PM_ENABLED:
wreq.wi_val[0] =
htole16((ic->ic_flags & IEEE80211_F_PMGTON) ? 1 : 0);
wreq.wi_len = 1;
break;
case WI_RID_MAX_SLEEP:
wreq.wi_val[0] = htole16(ic->ic_lintval);
wreq.wi_len = 1;
break;
case WI_RID_CUR_BEACON_INT:
wreq.wi_val[0] = htole16(ic->ic_bss->ni_intval);
wreq.wi_len = 1;
break;
case WI_RID_WEP_AVAIL:
wreq.wi_val[0] =
htole16((ic->ic_caps & IEEE80211_C_WEP) ? 1 : 0);
wreq.wi_len = 1;
break;
case WI_RID_CNFAUTHMODE:
wreq.wi_val[0] = htole16(1); /* TODO: open system only */
wreq.wi_len = 1;
break;
case WI_RID_ENCRYPTION:
wreq.wi_val[0] =
htole16((ic->ic_flags & IEEE80211_F_WEPON) ? 1 : 0);
wreq.wi_len = 1;
break;
case WI_RID_TX_CRYPT_KEY:
wreq.wi_val[0] = htole16(ic->ic_wep_txkey);
wreq.wi_len = 1;
break;
case WI_RID_DEFLT_CRYPT_KEYS:
keys = (struct wi_ltv_keys *)&wreq;
/* do not show keys to non-root user */
error = suser(curthread);
if (error) {
memset(keys, 0, sizeof(*keys));
error = 0;
break;
}
for (i = 0; i < IEEE80211_WEP_NKID; i++) {
keys->wi_keys[i].wi_keylen =
htole16(ic->ic_nw_keys[i].wk_len);
memcpy(keys->wi_keys[i].wi_keydat,
ic->ic_nw_keys[i].wk_key, ic->ic_nw_keys[i].wk_len);
}
wreq.wi_len = sizeof(*keys) / 2;
break;
case WI_RID_MAX_DATALEN:
wreq.wi_val[0] = htole16(IEEE80211_MAX_LEN); /* TODO: frag */
wreq.wi_len = 1;
break;
case WI_RID_IFACE_STATS:
/* XXX: should be implemented in lower drivers */
break;
case WI_RID_READ_APS:
if (ic->ic_opmode != IEEE80211_M_HOSTAP) {
/*
* Don't return results until active scan completes.
*/
if (ic->ic_state == IEEE80211_S_SCAN &&
(ic->ic_flags & IEEE80211_F_ASCAN)) {
error = EINPROGRESS;
break;
}
}
i = 0;
ap = (void *)((char *)wreq.wi_val + sizeof(i));
TAILQ_FOREACH(ni, &ic->ic_node, ni_list) {
if ((caddr_t)(ap + 1) > (caddr_t)(&wreq + 1))
break;
memset(ap, 0, sizeof(*ap));
if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
IEEE80211_ADDR_COPY(ap->bssid, ni->ni_macaddr);
ap->namelen = ic->ic_des_esslen;
if (ic->ic_des_esslen)
memcpy(ap->name, ic->ic_des_essid,
ic->ic_des_esslen);
} else {
IEEE80211_ADDR_COPY(ap->bssid, ni->ni_bssid);
ap->namelen = ni->ni_esslen;
if (ni->ni_esslen)
memcpy(ap->name, ni->ni_essid,
ni->ni_esslen);
}
ap->channel = ieee80211_chan2ieee(ic, ni->ni_chan);
ap->signal = ni->ni_rssi;
ap->capinfo = ni->ni_capinfo;
ap->interval = ni->ni_intval;
rs = &ni->ni_rates;
for (j = 0; j < rs->rs_nrates; j++) {
if (rs->rs_rates[j] & IEEE80211_RATE_BASIC) {
ap->rate = (rs->rs_rates[j] &
IEEE80211_RATE_VAL) * 5; /* XXX */
}
}
i++;
ap++;
}
memcpy(wreq.wi_val, &i, sizeof(i));
wreq.wi_len = (sizeof(int) + sizeof(*ap) * i) / 2;
break;
case WI_RID_PRISM2:
wreq.wi_val[0] = 1; /* XXX lie so SCAN_RES can give rates */
wreq.wi_len = sizeof(u_int16_t) / 2;
break;
case WI_RID_SCAN_RES: /* compatibility interface */
if (ic->ic_opmode != IEEE80211_M_HOSTAP &&
ic->ic_state == IEEE80211_S_SCAN) {
error = EINPROGRESS;
break;
}
/* NB: we use the Prism2 format so we can return rate info */
p2 = (struct wi_scan_p2_hdr *)wreq.wi_val;
res = (void *)&p2[1];
i = 0;
TAILQ_FOREACH(ni, &ic->ic_node, ni_list) {
if ((caddr_t)(res + 1) > (caddr_t)(&wreq + 1))
break;
res->wi_chan = ieee80211_chan2ieee(ic, ni->ni_chan);
res->wi_noise = 0;
res->wi_signal = ni->ni_rssi;
IEEE80211_ADDR_COPY(res->wi_bssid, ni->ni_bssid);
res->wi_interval = ni->ni_intval;
res->wi_capinfo = ni->ni_capinfo;
res->wi_ssid_len = ni->ni_esslen;
memcpy(res->wi_ssid, ni->ni_essid, IEEE80211_NWID_LEN);
/* NB: assumes wi_srates holds <= ni->ni_rates */
memcpy(res->wi_srates, ni->ni_rates.rs_rates,
sizeof(res->wi_srates));
if (ni->ni_rates.rs_nrates < 10)
res->wi_srates[ni->ni_rates.rs_nrates] = 0;
res->wi_rate = ni->ni_rates.rs_rates[ni->ni_txrate];
res->wi_rsvd = 0;
res++, i++;
}
p2->wi_rsvd = 0;
p2->wi_reason = i;
wreq.wi_len = (sizeof(*p2) + sizeof(*res) * i) / 2;
break;
case WI_RID_READ_CACHE:
i = 0;
TAILQ_FOREACH(ni, &ic->ic_node, ni_list) {
if (i == (WI_MAX_DATALEN/sizeof(struct wi_sigcache))-1)
break;
IEEE80211_ADDR_COPY(wsc.macsrc, ni->ni_macaddr);
memset(&wsc.ipsrc, 0, sizeof(wsc.ipsrc));
wsc.signal = ni->ni_rssi;
wsc.noise = 0;
wsc.quality = 0;
memcpy((caddr_t)wreq.wi_val + sizeof(wsc) * i,
&wsc, sizeof(wsc));
i++;
}
wreq.wi_len = sizeof(wsc) * i / 2;
break;
case WI_RID_SCAN_APS:
error = EINVAL;
break;
default:
error = EINVAL;
break;
}
if (error == 0) {
wreq.wi_len++;
error = copyout(&wreq, ifr->ifr_data, sizeof(wreq));
}
return error;
}
static int
findrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate)
{
#define IEEERATE(_ic,_m,_i) \
((_ic)->ic_sup_rates[_m].rs_rates[_i] & IEEE80211_RATE_VAL)
int i, nrates = ic->ic_sup_rates[mode].rs_nrates;
for (i = 0; i < nrates; i++)
if (IEEERATE(ic, mode, i) == rate)
return i;
return -1;
#undef IEEERATE
}
int
ieee80211_cfgset(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct ieee80211com *ic = (void *)ifp;
int i, j, len, error, rate;
struct ifreq *ifr = (struct ifreq *)data;
struct wi_ltv_keys *keys;
struct wi_req wreq;
u_char chanlist[roundup(IEEE80211_CHAN_MAX, NBBY)];
error = copyin(ifr->ifr_data, &wreq, sizeof(wreq));
if (error)
return error;
len = wreq.wi_len ? (wreq.wi_len - 1) * 2 : 0;
switch (wreq.wi_type) {
case WI_RID_SERIALNO:
case WI_RID_NODENAME:
return EPERM;
case WI_RID_CURRENT_SSID:
return EPERM;
case WI_RID_OWN_SSID:
case WI_RID_DESIRED_SSID:
if (le16toh(wreq.wi_val[0]) * 2 > len ||
le16toh(wreq.wi_val[0]) > IEEE80211_NWID_LEN) {
error = ENOSPC;
break;
}
memset(ic->ic_des_essid, 0, sizeof(ic->ic_des_essid));
ic->ic_des_esslen = le16toh(wreq.wi_val[0]) * 2;
memcpy(ic->ic_des_essid, &wreq.wi_val[1], ic->ic_des_esslen);
error = ENETRESET;
break;
case WI_RID_CURRENT_BSSID:
return EPERM;
case WI_RID_OWN_CHNL:
if (len != 2)
return EINVAL;
i = le16toh(wreq.wi_val[0]);
if (i < 0 ||
i > IEEE80211_CHAN_MAX ||
isclr(ic->ic_chan_active, i))
return EINVAL;
ic->ic_ibss_chan = &ic->ic_channels[i];
if (ic->ic_flags & IEEE80211_F_SIBSS)
error = ENETRESET;
break;
case WI_RID_CURRENT_CHAN:
return EPERM;
case WI_RID_COMMS_QUALITY:
return EPERM;
case WI_RID_PROMISC:
if (len != 2)
return EINVAL;
if (ifp->if_flags & IFF_PROMISC) {
if (wreq.wi_val[0] == 0) {
ifp->if_flags &= ~IFF_PROMISC;
error = ENETRESET;
}
} else {
if (wreq.wi_val[0] != 0) {
ifp->if_flags |= IFF_PROMISC;
error = ENETRESET;
}
}
break;
case WI_RID_PORTTYPE:
if (len != 2)
return EINVAL;
switch (le16toh(wreq.wi_val[0])) {
case IEEE80211_M_STA:
break;
case IEEE80211_M_IBSS:
if (!(ic->ic_caps & IEEE80211_C_IBSS))
return EINVAL;
break;
case IEEE80211_M_AHDEMO:
if (ic->ic_phytype != IEEE80211_T_DS ||
!(ic->ic_caps & IEEE80211_C_AHDEMO))
return EINVAL;
break;
case IEEE80211_M_HOSTAP:
if (!(ic->ic_caps & IEEE80211_C_HOSTAP))
return EINVAL;
break;
default:
return EINVAL;
}
if (le16toh(wreq.wi_val[0]) != ic->ic_opmode) {
ic->ic_opmode = le16toh(wreq.wi_val[0]);
error = ENETRESET;
}
break;
#if 0
case WI_RID_MAC_NODE:
if (len != IEEE80211_ADDR_LEN)
return EINVAL;
IEEE80211_ADDR_COPY(LLADDR(ifp->if_sadl), wreq.wi_val);
/* if_init will copy lladdr into ic_myaddr */
error = ENETRESET;
break;
#endif
case WI_RID_TX_RATE:
if (len != 2)
return EINVAL;
if (wreq.wi_val[0] == 0) {
/* auto */
ic->ic_fixed_rate = -1;
break;
}
rate = 2 * le16toh(wreq.wi_val[0]);
if (ic->ic_curmode == IEEE80211_MODE_AUTO) {
/*
* In autoselect mode search for the rate. We take
* the first instance which may not be right, but we
* are limited by the interface. Note that we also
* lock the mode to insure the rate is meaningful
* when it is used.
*/
for (j = IEEE80211_MODE_11A;
j < IEEE80211_MODE_MAX; j++) {
if ((ic->ic_modecaps & (1<<j)) == 0)
continue;
i = findrate(ic, j, rate);
if (i != -1) {
/* lock mode too */
ic->ic_curmode = j;
goto setrate;
}
}
} else {
i = findrate(ic, ic->ic_curmode, rate);
if (i != -1)
goto setrate;
}
return EINVAL;
setrate:
ic->ic_fixed_rate = i;
error = ENETRESET;
break;
case WI_RID_CUR_TX_RATE:
return EPERM;
case WI_RID_RTS_THRESH:
if (len != 2)
return EINVAL;
if (le16toh(wreq.wi_val[0]) != IEEE80211_MAX_LEN)
return EINVAL; /* TODO: RTS */
break;
case WI_RID_CREATE_IBSS:
if (len != 2)
return EINVAL;
if (wreq.wi_val[0] != 0) {
if ((ic->ic_caps & IEEE80211_C_IBSS) == 0)
return EINVAL;
if ((ic->ic_flags & IEEE80211_F_IBSSON) == 0) {
ic->ic_flags |= IEEE80211_F_IBSSON;
if (ic->ic_opmode == IEEE80211_M_IBSS &&
ic->ic_state == IEEE80211_S_SCAN)
error = ENETRESET;
}
} else {
if (ic->ic_flags & IEEE80211_F_IBSSON) {
ic->ic_flags &= ~IEEE80211_F_IBSSON;
if (ic->ic_flags & IEEE80211_F_SIBSS) {
ic->ic_flags &= ~IEEE80211_F_SIBSS;
error = ENETRESET;
}
}
}
break;
case WI_RID_MICROWAVE_OVEN:
if (len != 2)
return EINVAL;
if (wreq.wi_val[0] != 0)
return EINVAL; /* not supported */
break;
case WI_RID_ROAMING_MODE:
if (len != 2)
return EINVAL;
if (le16toh(wreq.wi_val[0]) != 1)
return EINVAL; /* not supported */
break;
case WI_RID_SYSTEM_SCALE:
if (len != 2)
return EINVAL;
if (le16toh(wreq.wi_val[0]) != 1)
return EINVAL; /* not supported */
break;
case WI_RID_PM_ENABLED:
if (len != 2)
return EINVAL;
if (wreq.wi_val[0] != 0) {
if ((ic->ic_caps & IEEE80211_C_PMGT) == 0)
return EINVAL;
if ((ic->ic_flags & IEEE80211_F_PMGTON) == 0) {
ic->ic_flags |= IEEE80211_F_PMGTON;
error = ENETRESET;
}
} else {
if (ic->ic_flags & IEEE80211_F_PMGTON) {
ic->ic_flags &= ~IEEE80211_F_PMGTON;
error = ENETRESET;
}
}
break;
case WI_RID_MAX_SLEEP:
if (len != 2)
return EINVAL;
ic->ic_lintval = le16toh(wreq.wi_val[0]);
if (ic->ic_flags & IEEE80211_F_PMGTON)
error = ENETRESET;
break;
case WI_RID_CUR_BEACON_INT:
return EPERM;
case WI_RID_WEP_AVAIL:
return EPERM;
case WI_RID_CNFAUTHMODE:
if (len != 2)
return EINVAL;
if (le16toh(wreq.wi_val[0]) != 1)
return EINVAL; /* TODO: shared key auth */
break;
case WI_RID_ENCRYPTION:
if (len != 2)
return EINVAL;
if (wreq.wi_val[0] != 0) {
if ((ic->ic_caps & IEEE80211_C_WEP) == 0)
return EINVAL;
if ((ic->ic_flags & IEEE80211_F_WEPON) == 0) {
ic->ic_flags |= IEEE80211_F_WEPON;
error = ENETRESET;
}
} else {
if (ic->ic_flags & IEEE80211_F_WEPON) {
ic->ic_flags &= ~IEEE80211_F_WEPON;
error = ENETRESET;
}
}
break;
case WI_RID_TX_CRYPT_KEY:
if (len != 2)
return EINVAL;
i = le16toh(wreq.wi_val[0]);
if (i >= IEEE80211_WEP_NKID)
return EINVAL;
ic->ic_wep_txkey = i;
break;
case WI_RID_DEFLT_CRYPT_KEYS:
if (len != sizeof(struct wi_ltv_keys))
return EINVAL;
keys = (struct wi_ltv_keys *)&wreq;
for (i = 0; i < IEEE80211_WEP_NKID; i++) {
len = le16toh(keys->wi_keys[i].wi_keylen);
if (len != 0 && len < IEEE80211_WEP_KEYLEN)
return EINVAL;
if (len > sizeof(ic->ic_nw_keys[i].wk_key))
return EINVAL;
}
memset(ic->ic_nw_keys, 0, sizeof(ic->ic_nw_keys));
for (i = 0; i < IEEE80211_WEP_NKID; i++) {
len = le16toh(keys->wi_keys[i].wi_keylen);
ic->ic_nw_keys[i].wk_len = len;
memcpy(ic->ic_nw_keys[i].wk_key,
keys->wi_keys[i].wi_keydat, len);
}
error = ENETRESET;
break;
case WI_RID_MAX_DATALEN:
if (len != 2)
return EINVAL;
len = le16toh(wreq.wi_val[0]);
if (len < 350 /* ? */ || len > IEEE80211_MAX_LEN)
return EINVAL;
if (len != IEEE80211_MAX_LEN)
return EINVAL; /* TODO: fragment */
ic->ic_fragthreshold = len;
error = ENETRESET;
break;
case WI_RID_IFACE_STATS:
error = EPERM;
break;
case WI_RID_SCAN_REQ: /* XXX wicontrol */
if (ic->ic_opmode == IEEE80211_M_HOSTAP)
break;
/* NB: ignore channel list and tx rate parameters */
error = ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
break;
case WI_RID_SCAN_APS:
if (ic->ic_opmode == IEEE80211_M_HOSTAP)
break;
len--; /* XXX: tx rate? */
/* FALLTHRU */
case WI_RID_CHANNEL_LIST:
memset(chanlist, 0, sizeof(chanlist));
/*
* Since channel 0 is not available for DS, channel 1
* is assigned to LSB on WaveLAN.
*/
if (ic->ic_phytype == IEEE80211_T_DS)
i = 1;
else
i = 0;
for (j = 0; i <= IEEE80211_CHAN_MAX; i++, j++) {
if ((j / 8) >= len)
break;
if (isclr((u_int8_t *)wreq.wi_val, j))
continue;
if (isclr(ic->ic_chan_active, i)) {
if (wreq.wi_type != WI_RID_CHANNEL_LIST)
continue;
if (isclr(ic->ic_chan_avail, i))
return EPERM;
}
setbit(chanlist, i);
}
memcpy(ic->ic_chan_active, chanlist,
sizeof(ic->ic_chan_active));
if (isclr(chanlist, ieee80211_chan2ieee(ic, ic->ic_ibss_chan))) {
for (i = 0; i <= IEEE80211_CHAN_MAX; i++)
if (isset(chanlist, i)) {
ic->ic_ibss_chan = &ic->ic_channels[i];
break;
}
}
if (isclr(chanlist, ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan)))
ic->ic_bss->ni_chan = ic->ic_ibss_chan;
if (wreq.wi_type == WI_RID_CHANNEL_LIST)
error = ENETRESET;
else
error = ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
break;
default:
error = EINVAL;
break;
}
return error;
}
int
ieee80211_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct ieee80211com *ic = (void *)ifp;
int error = 0;
u_int kid, len;
struct ieee80211req *ireq;
u_int8_t tmpkey[IEEE80211_KEYBUF_SIZE];
char tmpssid[IEEE80211_NWID_LEN];
struct ieee80211_channel *chan;
switch (cmd) {
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
error = ifmedia_ioctl(ifp, (struct ifreq *) data,
&ic->ic_media, cmd);
break;
case SIOCG80211:
ireq = (struct ieee80211req *) data;
switch (ireq->i_type) {
case IEEE80211_IOC_SSID:
switch (ic->ic_state) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
ireq->i_len = ic->ic_des_esslen;
memcpy(tmpssid, ic->ic_des_essid, ireq->i_len);
break;
default:
ireq->i_len = ic->ic_bss->ni_esslen;
memcpy(tmpssid, ic->ic_bss->ni_essid,
ireq->i_len);
break;
}
error = copyout(tmpssid, ireq->i_data, ireq->i_len);
break;
case IEEE80211_IOC_NUMSSIDS:
ireq->i_val = 1;
break;
case IEEE80211_IOC_WEP:
if ((ic->ic_caps & IEEE80211_C_WEP) == 0) {
ireq->i_val = IEEE80211_WEP_NOSUP;
} else {
if (ic->ic_flags & IEEE80211_F_WEPON) {
ireq->i_val =
IEEE80211_WEP_MIXED;
} else {
ireq->i_val =
IEEE80211_WEP_OFF;
}
}
break;
case IEEE80211_IOC_WEPKEY:
if ((ic->ic_caps & IEEE80211_C_WEP) == 0) {
error = EINVAL;
break;
}
kid = (u_int) ireq->i_val;
if (kid >= IEEE80211_WEP_NKID) {
error = EINVAL;
break;
}
len = (u_int) ic->ic_nw_keys[kid].wk_len;
/* NB: only root can read WEP keys */
if (suser(curthread)) {
bcopy(ic->ic_nw_keys[kid].wk_key, tmpkey, len);
} else {
bzero(tmpkey, len);
}
ireq->i_len = len;
error = copyout(tmpkey, ireq->i_data, len);
break;
case IEEE80211_IOC_NUMWEPKEYS:
if ((ic->ic_caps & IEEE80211_C_WEP) == 0)
error = EINVAL;
else
ireq->i_val = IEEE80211_WEP_NKID;
break;
case IEEE80211_IOC_WEPTXKEY:
if ((ic->ic_caps & IEEE80211_C_WEP) == 0)
error = EINVAL;
else
ireq->i_val = ic->ic_wep_txkey;
break;
case IEEE80211_IOC_AUTHMODE:
ireq->i_val = IEEE80211_AUTH_OPEN;
break;
case IEEE80211_IOC_CHANNEL:
switch (ic->ic_state) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
if (ic->ic_opmode == IEEE80211_M_STA)
chan = ic->ic_des_chan;
else
chan = ic->ic_ibss_chan;
break;
default:
chan = ic->ic_bss->ni_chan;
break;
}
ireq->i_val = ieee80211_chan2ieee(ic, chan);
break;
case IEEE80211_IOC_POWERSAVE:
if (ic->ic_flags & IEEE80211_F_PMGTON)
ireq->i_val = IEEE80211_POWERSAVE_ON;
else
ireq->i_val = IEEE80211_POWERSAVE_OFF;
break;
case IEEE80211_IOC_POWERSAVESLEEP:
ireq->i_val = ic->ic_lintval;
break;
case IEEE80211_IOCT_RTSTHRESHOLD:
ireq->i_val = ic->ic_rtsthreshold;
break;
default:
error = EINVAL;
}
break;
case SIOCS80211:
error = suser(curthread);
if (error)
break;
ireq = (struct ieee80211req *) data;
switch (ireq->i_type) {
case IEEE80211_IOC_SSID:
if (ireq->i_val != 0 ||
ireq->i_len > IEEE80211_NWID_LEN) {
error = EINVAL;
break;
}
error = copyin(ireq->i_data, tmpssid, ireq->i_len);
if (error)
break;
memset(ic->ic_des_essid, 0, IEEE80211_NWID_LEN);
ic->ic_des_esslen = ireq->i_len;
memcpy(ic->ic_des_essid, tmpssid, ireq->i_len);
error = ENETRESET;
break;
case IEEE80211_IOC_WEP:
/*
* These cards only support one mode so
* we just turn wep on if what ever is
* passed in is not OFF.
*/
if (ireq->i_val == IEEE80211_WEP_OFF) {
ic->ic_flags &= ~IEEE80211_F_WEPON;
} else {
ic->ic_flags |= IEEE80211_F_WEPON;
}
error = ENETRESET;
break;
case IEEE80211_IOC_WEPKEY:
if ((ic->ic_caps & IEEE80211_C_WEP) == 0) {
error = EINVAL;
break;
}
kid = (u_int) ireq->i_val;
if (kid >= IEEE80211_WEP_NKID) {
error = EINVAL;
break;
}
if (ireq->i_len > sizeof(tmpkey)) {
error = EINVAL;
break;
}
memset(tmpkey, 0, sizeof(tmpkey));
error = copyin(ireq->i_data, tmpkey, ireq->i_len);
if (error)
break;
memcpy(ic->ic_nw_keys[kid].wk_key, tmpkey,
sizeof(tmpkey));
ic->ic_nw_keys[kid].wk_len = ireq->i_len;
error = ENETRESET;
break;
case IEEE80211_IOC_WEPTXKEY:
kid = (u_int) ireq->i_val;
if (kid >= IEEE80211_WEP_NKID) {
error = EINVAL;
break;
}
ic->ic_wep_txkey = kid;
error = ENETRESET;
break;
#if 0
case IEEE80211_IOC_AUTHMODE:
sc->wi_authmode = ireq->i_val;
break;
#endif
case IEEE80211_IOC_CHANNEL:
/* XXX 0xffff overflows 16-bit signed */
if (ireq->i_val == 0 ||
ireq->i_val == (int16_t) IEEE80211_CHAN_ANY)
ic->ic_des_chan = IEEE80211_CHAN_ANYC;
else if ((u_int) ireq->i_val > IEEE80211_CHAN_MAX ||
isclr(ic->ic_chan_active, ireq->i_val)) {
error = EINVAL;
break;
} else
ic->ic_ibss_chan = ic->ic_des_chan =
&ic->ic_channels[ireq->i_val];
switch (ic->ic_state) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
error = ENETRESET;
break;
default:
if (ic->ic_opmode == IEEE80211_M_STA) {
if (ic->ic_des_chan != IEEE80211_CHAN_ANYC &&
ic->ic_bss->ni_chan != ic->ic_des_chan)
error = ENETRESET;
} else {
if (ic->ic_bss->ni_chan != ic->ic_ibss_chan)
error = ENETRESET;
}
break;
}
break;
case IEEE80211_IOC_POWERSAVE:
switch (ireq->i_val) {
case IEEE80211_POWERSAVE_OFF:
if (ic->ic_flags & IEEE80211_F_PMGTON) {
ic->ic_flags &= ~IEEE80211_F_PMGTON;
error = ENETRESET;
}
break;
case IEEE80211_POWERSAVE_ON:
if ((ic->ic_caps & IEEE80211_C_PMGT) == 0)
error = EINVAL;
else if ((ic->ic_flags & IEEE80211_F_PMGTON) == 0) {
ic->ic_flags |= IEEE80211_F_PMGTON;
error = ENETRESET;
}
break;
default:
error = EINVAL;
break;
}
break;
case IEEE80211_IOC_POWERSAVESLEEP:
if (ireq->i_val < 0) {
error = EINVAL;
break;
}
ic->ic_lintval = ireq->i_val;
error = ENETRESET;
break;
case IEEE80211_IOCT_RTSTHRESHOLD:
if (!(IEEE80211_RTS_MIN < ireq->i_val &&
ireq->i_val < IEEE80211_RTS_MAX)) {
error = EINVAL;
break;
}
ic->ic_rtsthreshold = ireq->i_val;
error = ENETRESET;
break;
default:
error = EINVAL;
break;
}
break;
case SIOCGIFGENERIC:
error = ieee80211_cfgget(ifp, cmd, data);
break;
case SIOCSIFGENERIC:
error = suser(curthread);
if (error)
break;
error = ieee80211_cfgset(ifp, cmd, data);
break;
default:
error = ether_ioctl(ifp, cmd, data);
break;
}
return error;
}

84
sys/net80211/ieee80211_ioctl.h Normal file
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@ -0,0 +1,84 @@
/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002, 2003 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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.
*
* $FreeBSD: src/sys/net80211/ieee80211_ioctl.h,v 1.2 2003/06/27 05:13:52 sam Exp $
*/
#ifndef _NET80211_IEEE80211_IOCTL_H_
#define _NET80211_IEEE80211_IOCTL_H_
/*
* IEEE 802.11 ioctls.
*/
#ifdef __FreeBSD__
/*
* FreeBSD-style ioctls.
*/
/* the first member must be matched with struct ifreq */
struct ieee80211req {
char i_name[IFNAMSIZ]; /* if_name, e.g. "wi0" */
u_int16_t i_type; /* req type */
int16_t i_val; /* Index or simple value */
int16_t i_len; /* Index or simple value */
void *i_data; /* Extra data */
};
#define SIOCS80211 _IOW('i', 234, struct ieee80211req)
#define SIOCG80211 _IOWR('i', 235, struct ieee80211req)
#define IEEE80211_IOC_SSID 1
#define IEEE80211_IOC_NUMSSIDS 2
#define IEEE80211_IOC_WEP 3
#define IEEE80211_WEP_NOSUP -1
#define IEEE80211_WEP_OFF 0
#define IEEE80211_WEP_ON 1
#define IEEE80211_WEP_MIXED 2
#define IEEE80211_IOC_WEPKEY 4
#define IEEE80211_IOC_NUMWEPKEYS 5
#define IEEE80211_IOC_WEPTXKEY 6
#define IEEE80211_IOC_AUTHMODE 7
#define IEEE80211_IOC_STATIONNAME 8
#define IEEE80211_IOC_CHANNEL 9
#define IEEE80211_IOC_POWERSAVE 10
#define IEEE80211_POWERSAVE_NOSUP -1
#define IEEE80211_POWERSAVE_OFF 0
#define IEEE80211_POWERSAVE_CAM 1
#define IEEE80211_POWERSAVE_PSP 2
#define IEEE80211_POWERSAVE_PSP_CAM 3
#define IEEE80211_POWERSAVE_ON IEEE80211_POWERSAVE_CAM
#define IEEE80211_IOC_POWERSAVESLEEP 11
#define IEEE80211_IOCT_RTSTHRESHOLD 12
#ifndef IEEE80211_CHAN_ANY
#define IEEE80211_CHAN_ANY 0xffff /* token for ``any channel'' */
#endif
#endif /* __FreeBSD__ */
#endif /* _NET80211_IEEE80211_IOCTL_H_ */

570
sys/net80211/ieee80211_node.c Normal file
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@ -0,0 +1,570 @@
/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002, 2003 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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: src/sys/net80211/ieee80211_node.c,v 1.6 2003/08/19 22:17:03 sam Exp $");
#include "opt_inet.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/bus.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <machine/atomic.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_llc.h>
#include <net80211/ieee80211_var.h>
#include <net/bpf.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_ether.h>
#endif
static struct ieee80211_node *ieee80211_node_alloc(struct ieee80211com *);
static void ieee80211_node_free(struct ieee80211com *, struct ieee80211_node *);
static void ieee80211_node_copy(struct ieee80211com *,
struct ieee80211_node *, const struct ieee80211_node *);
static void ieee80211_setup_node(struct ieee80211com *ic,
struct ieee80211_node *ni, u_int8_t *macaddr);
static void _ieee80211_free_node(struct ieee80211com *,
struct ieee80211_node *);
void
ieee80211_node_attach(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
/* XXX need unit */
mtx_init(&ic->ic_nodelock, ifp->if_name, "802.11 node table", MTX_DEF);
TAILQ_INIT(&ic->ic_node);
ic->ic_node_alloc = ieee80211_node_alloc;
ic->ic_node_free = ieee80211_node_free;
ic->ic_node_copy = ieee80211_node_copy;
}
void
ieee80211_node_lateattach(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
ic->ic_bss = (*ic->ic_node_alloc)(ic);
KASSERT(ic->ic_bss != NULL, ("unable to setup inital BSS node"));
ic->ic_bss->ni_chan = IEEE80211_CHAN_ANYC;
}
void
ieee80211_node_detach(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
if (ic->ic_bss != NULL)
(*ic->ic_node_free)(ic, ic->ic_bss);
ieee80211_free_allnodes(ic);
mtx_destroy(&ic->ic_nodelock);
}
/*
* AP scanning support.
*/
/*
* Initialize the active channel set based on the set
* of available channels and the current PHY mode.
*/
static void
ieee80211_reset_scan(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
memcpy(ic->ic_chan_scan, ic->ic_chan_active,
sizeof(ic->ic_chan_active));
/* NB: hack, setup so next_scan starts with the first channel */
if (ic->ic_bss->ni_chan == IEEE80211_CHAN_ANYC)
ic->ic_bss->ni_chan = &ic->ic_channels[IEEE80211_CHAN_MAX];
}
/*
* Begin an active scan.
*/
void
ieee80211_begin_scan(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
/*
* In all but hostap mode scanning starts off in
* an active mode before switching to passive.
*/
if (ic->ic_opmode != IEEE80211_M_HOSTAP)
ic->ic_flags |= IEEE80211_F_ASCAN;
if (ifp->if_flags & IFF_DEBUG)
if_printf(ifp, "begin %s scan\n",
(ic->ic_flags & IEEE80211_F_ASCAN) ?
"active" : "passive");
/*
* Clear scan state and flush any previously seen
* AP's. Note that the latter assumes we don't act
* as both an AP and a station, otherwise we'll
* potentially flush state of stations associated
* with us.
*/
ieee80211_reset_scan(ifp);
ieee80211_free_allnodes(ic);
/* Scan the next channel. */
ieee80211_next_scan(ifp);
}
/*
* Switch to the next channel marked for scanning.
*/
void
ieee80211_next_scan(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
struct ieee80211_channel *chan;
chan = ic->ic_bss->ni_chan;
for (;;) {
if (++chan > &ic->ic_channels[IEEE80211_CHAN_MAX])
chan = &ic->ic_channels[0];
if (isset(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan))) {
/*
* Honor channels marked passive-only
* during an active scan.
*/
if ((ic->ic_flags & IEEE80211_F_ASCAN) == 0 ||
(chan->ic_flags & IEEE80211_CHAN_PASSIVE) == 0)
break;
}
if (chan == ic->ic_bss->ni_chan) {
ieee80211_end_scan(ifp);
return;
}
}
clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan));
IEEE80211_DPRINTF(("ieee80211_next_scan: chan %d->%d\n",
ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan),
ieee80211_chan2ieee(ic, chan)));
ic->ic_bss->ni_chan = chan;
ieee80211_new_state(ic, IEEE80211_S_SCAN, -1);
}
void
ieee80211_create_ibss(struct ieee80211com* ic, struct ieee80211_channel *chan)
{
struct ieee80211_node *ni;
struct ifnet *ifp = &ic->ic_if;
ni = ic->ic_bss;
if (ifp->if_flags & IFF_DEBUG)
if_printf(ifp, "creating ibss\n");
ic->ic_flags |= IEEE80211_F_SIBSS;
ni->ni_chan = chan;
ni->ni_rates = ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)];
IEEE80211_ADDR_COPY(ni->ni_macaddr, ic->ic_myaddr);
IEEE80211_ADDR_COPY(ni->ni_bssid, ic->ic_myaddr);
if (ic->ic_opmode == IEEE80211_M_IBSS)
ni->ni_bssid[0] |= 0x02; /* local bit for IBSS */
ni->ni_esslen = ic->ic_des_esslen;
memcpy(ni->ni_essid, ic->ic_des_essid, ni->ni_esslen);
ni->ni_rssi = 0;
ni->ni_rstamp = 0;
memset(ni->ni_tstamp, 0, sizeof(ni->ni_tstamp));
ni->ni_intval = ic->ic_lintval;
ni->ni_capinfo = IEEE80211_CAPINFO_IBSS;
if (ic->ic_flags & IEEE80211_F_WEPON)
ni->ni_capinfo |= IEEE80211_CAPINFO_PRIVACY;
if (ic->ic_phytype == IEEE80211_T_FH) {
ni->ni_fhdwell = 200; /* XXX */
ni->ni_fhindex = 1;
}
ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
}
/*
* Complete a scan of potential channels.
*/
void
ieee80211_end_scan(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
struct ieee80211_node *ni, *nextbs, *selbs;
u_int8_t rate;
int i, fail;
ic->ic_flags &= ~IEEE80211_F_ASCAN;
ni = TAILQ_FIRST(&ic->ic_node);
if (ic->ic_opmode == IEEE80211_M_HOSTAP) {
/* XXX off stack? */
u_char occupied[roundup(IEEE80211_CHAN_MAX, NBBY)];
/*
* The passive scan to look for existing AP's completed,
* select a channel to camp on. Identify the channels
* that already have one or more AP's and try to locate
* an unnoccupied one. If that fails, pick a random
* channel from the active set.
*/
for (; ni != NULL; ni = nextbs) {
ieee80211_ref_node(ni);
nextbs = TAILQ_NEXT(ni, ni_list);
setbit(occupied, ieee80211_chan2ieee(ic, ni->ni_chan));
ieee80211_free_node(ic, ni);
}
for (i = 0; i < IEEE80211_CHAN_MAX; i++)
if (isset(ic->ic_chan_active, i) && isclr(occupied, i))
break;
if (i == IEEE80211_CHAN_MAX) {
fail = arc4random() & 3; /* random 0-3 */
for (i = 0; i < IEEE80211_CHAN_MAX; i++)
if (isset(ic->ic_chan_active, i) && fail-- == 0)
break;
}
ieee80211_create_ibss(ic, &ic->ic_channels[i]);
return;
}
if (ni == NULL) {
IEEE80211_DPRINTF(("%s: no scan candidate\n", __func__));
notfound:
if (ic->ic_opmode == IEEE80211_M_IBSS &&
(ic->ic_flags & IEEE80211_F_IBSSON) &&
ic->ic_des_esslen != 0) {
ieee80211_create_ibss(ic, ic->ic_ibss_chan);
return;
}
/*
* Reset the list of channels to scan and start again.
*/
ieee80211_reset_scan(ifp);
ieee80211_next_scan(ifp);
return;
}
selbs = NULL;
if (ifp->if_flags & IFF_DEBUG)
if_printf(ifp, "\tmacaddr bssid chan rssi rate flag wep essid\n");
for (; ni != NULL; ni = nextbs) {
ieee80211_ref_node(ni);
nextbs = TAILQ_NEXT(ni, ni_list);
if (ni->ni_fails) {
/*
* The configuration of the access points may change
* during my scan. So delete the entry for the AP
* and retry to associate if there is another beacon.
*/
if (ni->ni_fails++ > 2)
ieee80211_free_node(ic, ni);
continue;
}
fail = 0;
if (isclr(ic->ic_chan_active, ieee80211_chan2ieee(ic, ni->ni_chan)))
fail |= 0x01;
if (ic->ic_des_chan != IEEE80211_CHAN_ANYC &&
ni->ni_chan != ic->ic_des_chan)
fail |= 0x01;
if (ic->ic_opmode == IEEE80211_M_IBSS) {
if ((ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) == 0)
fail |= 0x02;
} else {
if ((ni->ni_capinfo & IEEE80211_CAPINFO_ESS) == 0)
fail |= 0x02;
}
if (ic->ic_flags & IEEE80211_F_WEPON) {
if ((ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) == 0)
fail |= 0x04;
} else {
if (ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY)
fail |= 0x04;
}
rate = ieee80211_fix_rate(ic, ni, IEEE80211_F_DONEGO);
if (rate & IEEE80211_RATE_BASIC)
fail |= 0x08;
if (ic->ic_des_esslen != 0 &&
(ni->ni_esslen != ic->ic_des_esslen ||
memcmp(ni->ni_essid, ic->ic_des_essid,
ic->ic_des_esslen != 0)))
fail |= 0x10;
if ((ic->ic_flags & IEEE80211_F_DESBSSID) &&
!IEEE80211_ADDR_EQ(ic->ic_des_bssid, ni->ni_bssid))
fail |= 0x20;
if (ifp->if_flags & IFF_DEBUG) {
printf(" %c %s", fail ? '-' : '+',
ether_sprintf(ni->ni_macaddr));
printf(" %s%c", ether_sprintf(ni->ni_bssid),
fail & 0x20 ? '!' : ' ');
printf(" %3d%c", ieee80211_chan2ieee(ic, ni->ni_chan),
fail & 0x01 ? '!' : ' ');
printf(" %+4d", ni->ni_rssi);
printf(" %2dM%c", (rate & IEEE80211_RATE_VAL) / 2,
fail & 0x08 ? '!' : ' ');
printf(" %4s%c",
(ni->ni_capinfo & IEEE80211_CAPINFO_ESS) ? "ess" :
(ni->ni_capinfo & IEEE80211_CAPINFO_IBSS) ? "ibss" :
"????",
fail & 0x02 ? '!' : ' ');
printf(" %3s%c ",
(ni->ni_capinfo & IEEE80211_CAPINFO_PRIVACY) ?
"wep" : "no",
fail & 0x04 ? '!' : ' ');
ieee80211_print_essid(ni->ni_essid, ni->ni_esslen);
printf("%s\n", fail & 0x10 ? "!" : "");
}
if (!fail) {
if (selbs == NULL)
selbs = ni;
else if (ni->ni_rssi > selbs->ni_rssi) {
ieee80211_unref_node(&selbs);
selbs = ni;
} else
ieee80211_unref_node(&ni);
} else {
ieee80211_unref_node(&ni);
}
}
if (selbs == NULL)
goto notfound;
(*ic->ic_node_copy)(ic, ic->ic_bss, selbs);
if (ic->ic_opmode == IEEE80211_M_IBSS) {
ieee80211_fix_rate(ic, ic->ic_bss, IEEE80211_F_DOFRATE |
IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
if (ic->ic_bss->ni_rates.rs_nrates == 0) {
selbs->ni_fails++;
ieee80211_unref_node(&selbs);
goto notfound;
}
ieee80211_unref_node(&selbs);
ieee80211_new_state(ic, IEEE80211_S_RUN, -1);
} else {
ieee80211_unref_node(&selbs);
ieee80211_new_state(ic, IEEE80211_S_AUTH, -1);
}
}
static struct ieee80211_node *
ieee80211_node_alloc(struct ieee80211com *ic)
{
return malloc(sizeof(struct ieee80211_node), M_DEVBUF,
M_NOWAIT | M_ZERO);
}
static void
ieee80211_node_free(struct ieee80211com *ic, struct ieee80211_node *ni)
{
free(ni, M_DEVBUF);
}
static void
ieee80211_node_copy(struct ieee80211com *ic,
struct ieee80211_node *dst, const struct ieee80211_node *src)
{
*dst = *src;
}
static void
ieee80211_setup_node(struct ieee80211com *ic,
struct ieee80211_node *ni, u_int8_t *macaddr)
{
int hash;
IEEE80211_ADDR_COPY(ni->ni_macaddr, macaddr);
hash = IEEE80211_NODE_HASH(macaddr);
ni->ni_refcnt = 1; /* mark referenced */
mtx_lock(&ic->ic_nodelock);
TAILQ_INSERT_TAIL(&ic->ic_node, ni, ni_list);
LIST_INSERT_HEAD(&ic->ic_hash[hash], ni, ni_hash);
/*
* Note we don't enable the inactive timer when acting
* as a station. Nodes created in this mode represent
* AP's identified while scanning. If we time them out
* then several things happen: we can't return the data
* to users to show the list of AP's we encountered, and
* more importantly, we'll incorrectly deauthenticate
* ourself because the inactivity timer will kick us off.
*/
if (ic->ic_opmode != IEEE80211_M_STA)
ic->ic_inact_timer = IEEE80211_INACT_WAIT;
mtx_unlock(&ic->ic_nodelock);
}
struct ieee80211_node *
ieee80211_alloc_node(struct ieee80211com *ic, u_int8_t *macaddr)
{
struct ieee80211_node *ni = (*ic->ic_node_alloc)(ic);
if (ni != NULL)
ieee80211_setup_node(ic, ni, macaddr);
return ni;
}
struct ieee80211_node *
ieee80211_dup_bss(struct ieee80211com *ic, u_int8_t *macaddr)
{
struct ieee80211_node *ni = (*ic->ic_node_alloc)(ic);
if (ni != NULL) {
memcpy(ni, ic->ic_bss, sizeof(struct ieee80211_node));
ieee80211_setup_node(ic, ni, macaddr);
}
return ni;
}
struct ieee80211_node *
ieee80211_find_node(struct ieee80211com *ic, u_int8_t *macaddr)
{
struct ieee80211_node *ni;
int hash;
hash = IEEE80211_NODE_HASH(macaddr);
mtx_lock(&ic->ic_nodelock);
LIST_FOREACH(ni, &ic->ic_hash[hash], ni_hash) {
if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr)) {
atomic_add_int(&ni->ni_refcnt, 1); /* mark referenced */
break;
}
}
mtx_unlock(&ic->ic_nodelock);
return ni;
}
/*
* Like find but search based on the channel too.
*/
struct ieee80211_node *
ieee80211_lookup_node(struct ieee80211com *ic,
u_int8_t *macaddr, struct ieee80211_channel *chan)
{
struct ieee80211_node *ni;
int hash;
hash = IEEE80211_NODE_HASH(macaddr);
mtx_lock(&ic->ic_nodelock);
LIST_FOREACH(ni, &ic->ic_hash[hash], ni_hash) {
if (IEEE80211_ADDR_EQ(ni->ni_macaddr, macaddr) && ni->ni_chan == chan) {
atomic_add_int(&ni->ni_refcnt, 1);/* mark referenced */
break;
}
}
mtx_unlock(&ic->ic_nodelock);
return ni;
}
static void
_ieee80211_free_node(struct ieee80211com *ic, struct ieee80211_node *ni)
{
KASSERT(ni != ic->ic_bss, ("freeing bss node"));
TAILQ_REMOVE(&ic->ic_node, ni, ni_list);
LIST_REMOVE(ni, ni_hash);
if (TAILQ_EMPTY(&ic->ic_node))
ic->ic_inact_timer = 0;
(*ic->ic_node_free)(ic, ni);
}
void
ieee80211_free_node(struct ieee80211com *ic, struct ieee80211_node *ni)
{
KASSERT(ni != ic->ic_bss, ("freeing ic_bss"));
/* XXX need equivalent of atomic_dec_and_test */
atomic_subtract_int(&ni->ni_refcnt, 1);
if (atomic_cmpset_int(&ni->ni_refcnt, 0, 1)) {
mtx_lock(&ic->ic_nodelock);
_ieee80211_free_node(ic, ni);
mtx_unlock(&ic->ic_nodelock);
}
}
void
ieee80211_free_allnodes(struct ieee80211com *ic)
{
struct ieee80211_node *ni;
mtx_lock(&ic->ic_nodelock);
while ((ni = TAILQ_FIRST(&ic->ic_node)) != NULL)
_ieee80211_free_node(ic, ni);
mtx_unlock(&ic->ic_nodelock);
}
void
ieee80211_timeout_nodes(struct ieee80211com *ic)
{
struct ieee80211_node *ni, *nextbs;
mtx_lock(&ic->ic_nodelock);
for (ni = TAILQ_FIRST(&ic->ic_node); ni != NULL;) {
if (++ni->ni_inact > IEEE80211_INACT_MAX) {
IEEE80211_DPRINTF(("station %s timed out "
"due to inactivity (%u secs)\n",
ether_sprintf(ni->ni_macaddr),
ni->ni_inact));
nextbs = TAILQ_NEXT(ni, ni_list);
/*
* Send a deauthenticate frame.
*/
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_DEAUTH,
IEEE80211_REASON_AUTH_EXPIRE);
ieee80211_free_node(ic, ni);
ni = nextbs;
} else
ni = TAILQ_NEXT(ni, ni_list);
}
if (!TAILQ_EMPTY(&ic->ic_node))
ic->ic_inact_timer = IEEE80211_INACT_WAIT;
mtx_unlock(&ic->ic_nodelock);
}
void
ieee80211_iterate_nodes(struct ieee80211com *ic, ieee80211_iter_func *f, void *arg)
{
struct ieee80211_node *ni;
mtx_lock(&ic->ic_nodelock);
TAILQ_FOREACH(ni, &ic->ic_node, ni_list)
(*f)(arg, ni);
mtx_unlock(&ic->ic_nodelock);
}

147
sys/net80211/ieee80211_node.h Normal file
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@ -0,0 +1,147 @@
/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002, 2003 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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.
*
* $FreeBSD: src/sys/net80211/ieee80211_node.h,v 1.5 2003/08/19 22:17:03 sam Exp $
*/
#ifndef _NET80211_IEEE80211_NODE_H_
#define _NET80211_IEEE80211_NODE_H_
#define IEEE80211_PSCAN_WAIT 5 /* passive scan wait */
#define IEEE80211_TRANS_WAIT 5 /* transition wait */
#define IEEE80211_INACT_WAIT 5 /* inactivity timer interval */
#define IEEE80211_INACT_MAX (300/IEEE80211_INACT_WAIT)
#define IEEE80211_NODE_HASHSIZE 32
/* simple hash is enough for variation of macaddr */
#define IEEE80211_NODE_HASH(addr) \
(((u_int8_t *)(addr))[IEEE80211_ADDR_LEN - 1] % IEEE80211_NODE_HASHSIZE)
#define IEEE80211_RATE_SIZE 8 /* 802.11 standard */
#define IEEE80211_RATE_MAXSIZE 15 /* max rates we'll handle */
struct ieee80211_rateset {
u_int8_t rs_nrates;
u_int8_t rs_rates[IEEE80211_RATE_MAXSIZE];
};
/*
* Node specific information. Note that drivers are expected
* to derive from this structure to add device-specific per-node
* state. This is done by overriding the ic_node_* methods in
* the ieee80211com structure.
*/
struct ieee80211_node {
TAILQ_ENTRY(ieee80211_node) ni_list;
LIST_ENTRY(ieee80211_node) ni_hash;
u_int ni_refcnt;
/* hardware */
u_int32_t ni_rstamp; /* recv timestamp */
u_int8_t ni_rssi; /* recv ssi */
/* header */
u_int8_t ni_macaddr[IEEE80211_ADDR_LEN];
u_int8_t ni_bssid[IEEE80211_ADDR_LEN];
/* beacon, probe response */
u_int8_t ni_tstamp[8]; /* from last rcv'd beacon */
u_int16_t ni_intval; /* beacon interval */
u_int16_t ni_capinfo; /* capabilities */
u_int8_t ni_esslen;
u_int8_t ni_essid[IEEE80211_NWID_LEN];
struct ieee80211_rateset ni_rates; /* negotiated rate set */
u_int8_t *ni_country; /* country information XXX */
struct ieee80211_channel *ni_chan;
u_int16_t ni_fhdwell; /* FH only */
u_int8_t ni_fhindex; /* FH only */
u_int8_t ni_erp; /* 11g only */
#ifdef notyet
/* DTIM and contention free period (CFP) */
u_int8_t ni_dtimperiod;
u_int8_t ni_cfpperiod; /* # of DTIMs between CFPs */
u_int16_t ni_cfpduremain; /* remaining cfp duration */
u_int16_t ni_cfpmaxduration;/* max CFP duration in TU */
u_int16_t ni_nextdtim; /* time to next DTIM */
u_int16_t ni_timoffset;
#endif
/* others */
u_int16_t ni_associd; /* assoc response */
u_int16_t ni_txseq; /* seq to be transmitted */
u_int16_t ni_rxseq; /* seq previous received */
int ni_fails; /* failure count to associate */
int ni_inact; /* inactivity mark count */
int ni_txrate; /* index to ni_rates[] */
};
static __inline struct ieee80211_node *
ieee80211_ref_node(struct ieee80211_node *ni)
{
atomic_add_int(&ni->ni_refcnt, 1);
return ni;
}
static __inline void
ieee80211_unref_node(struct ieee80211_node **ni)
{
atomic_subtract_int(&(*ni)->ni_refcnt, 1);
*ni = NULL; /* guard against use */
}
struct ieee80211com;
extern void ieee80211_node_attach(struct ifnet *);
extern void ieee80211_node_lateattach(struct ifnet *);
extern void ieee80211_node_detach(struct ifnet *);
extern void ieee80211_begin_scan(struct ifnet *);
extern void ieee80211_next_scan(struct ifnet *);
extern void ieee80211_end_scan(struct ifnet *);
extern struct ieee80211_node *ieee80211_alloc_node(struct ieee80211com *,
u_int8_t *);
extern struct ieee80211_node *ieee80211_dup_bss(struct ieee80211com *,
u_int8_t *);
extern struct ieee80211_node *ieee80211_find_node(struct ieee80211com *,
u_int8_t *);
extern struct ieee80211_node * ieee80211_lookup_node(struct ieee80211com *,
u_int8_t *macaddr, struct ieee80211_channel *);
extern void ieee80211_free_node(struct ieee80211com *,
struct ieee80211_node *);
extern void ieee80211_free_allnodes(struct ieee80211com *);
typedef void ieee80211_iter_func(void *, struct ieee80211_node *);
extern void ieee80211_iterate_nodes(struct ieee80211com *ic,
ieee80211_iter_func *, void *);
extern void ieee80211_timeout_nodes(struct ieee80211com *);
extern void ieee80211_create_ibss(struct ieee80211com* ,
struct ieee80211_channel *);
#endif /* _NET80211_IEEE80211_NODE_H_ */

551
sys/net80211/ieee80211_output.c Normal file
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@ -0,0 +1,551 @@
/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002, 2003 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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: src/sys/net80211/ieee80211_output.c,v 1.4 2003/08/19 22:17:03 sam Exp $");
#include "opt_inet.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/bus.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <machine/atomic.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_llc.h>
#include <net80211/ieee80211_var.h>
#include <net/bpf.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_ether.h>
#endif
/*
* Send a management frame to the specified node. The node pointer
* must have a reference as the pointer will be passed to the driver
* and potentially held for a long time. If the frame is successfully
* dispatched to the driver, then it is responsible for freeing the
* reference (and potentially free'ing up any associated storage).
*/
static int
ieee80211_mgmt_output(struct ifnet *ifp, struct ieee80211_node *ni,
struct mbuf *m, int type)
{
struct ieee80211com *ic = (void *)ifp;
struct ieee80211_frame *wh;
KASSERT(ni != NULL, ("null node"));
ni->ni_inact = 0;
/*
* Yech, hack alert! We want to pass the node down to the
* driver's start routine. If we don't do so then the start
* routine must immediately look it up again and that can
* cause a lock order reversal if, for example, this frame
* is being sent because the station is being timedout and
* the frame being sent is a DEAUTH message. We could stick
* this in an m_tag and tack that on to the mbuf. However
* that's rather expensive to do for every frame so instead
* we stuff it in the rcvif field since outbound frames do
* not (presently) use this.
*/
M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT);
if (m == NULL)
return ENOMEM;
KASSERT(m->m_pkthdr.rcvif == NULL, ("rcvif not null"));
m->m_pkthdr.rcvif = (void *)ni;
wh = mtod(m, struct ieee80211_frame *);
wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | type;
wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
*(u_int16_t *)wh->i_dur = 0;
*(u_int16_t *)wh->i_seq =
htole16(ni->ni_txseq << IEEE80211_SEQ_SEQ_SHIFT);
ni->ni_txseq++;
IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr);
IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr);
IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid);
if (ifp->if_flags & IFF_DEBUG) {
/* avoid to print too many frames */
if (ic->ic_opmode == IEEE80211_M_IBSS ||
#ifdef IEEE80211_DEBUG
ieee80211_debug > 1 ||
#endif
(type & IEEE80211_FC0_SUBTYPE_MASK) !=
IEEE80211_FC0_SUBTYPE_PROBE_RESP)
if_printf(ifp, "sending %s to %s on channel %u\n",
ieee80211_mgt_subtype_name[
(type & IEEE80211_FC0_SUBTYPE_MASK)
>> IEEE80211_FC0_SUBTYPE_SHIFT],
ether_sprintf(ni->ni_macaddr),
ieee80211_chan2ieee(ic, ni->ni_chan));
}
IF_ENQUEUE(&ic->ic_mgtq, m);
ifp->if_timer = 1;
(*ifp->if_start)(ifp);
return 0;
}
/*
* Encapsulate an outbound data frame. The mbuf chain is updated and
* a reference to the destination node is returned. If an error is
* encountered NULL is returned and the node reference will also be NULL.
*
* NB: The caller is responsible for free'ing a returned node reference.
* The convention is ic_bss is not reference counted; the caller must
* maintain that.
*/
struct mbuf *
ieee80211_encap(struct ifnet *ifp, struct mbuf *m, struct ieee80211_node **pni)
{
struct ieee80211com *ic = (void *)ifp;
struct ether_header eh;
struct ieee80211_frame *wh;
struct ieee80211_node *ni = NULL;
struct llc *llc;
if (m->m_len < sizeof(struct ether_header)) {
m = m_pullup(m, sizeof(struct ether_header));
if (m == NULL) {
/* XXX statistic */
goto bad;
}
}
memcpy(&eh, mtod(m, caddr_t), sizeof(struct ether_header));
if (ic->ic_opmode != IEEE80211_M_STA) {
ni = ieee80211_find_node(ic, eh.ether_dhost);
if (ni == NULL) {
/*
* When not in station mode the
* destination address should always be
* in the node table unless this is a
* multicast/broadcast frame.
*/
if (!IEEE80211_IS_MULTICAST(eh.ether_dhost)) {
/* ic->ic_stats.st_tx_nonode++; XXX statistic */
goto bad;
}
ni = ic->ic_bss;
}
} else
ni = ic->ic_bss;
ni->ni_inact = 0;
m_adj(m, sizeof(struct ether_header) - sizeof(struct llc));
llc = mtod(m, struct llc *);
llc->llc_dsap = llc->llc_ssap = LLC_SNAP_LSAP;
llc->llc_control = LLC_UI;
llc->llc_snap.org_code[0] = 0;
llc->llc_snap.org_code[1] = 0;
llc->llc_snap.org_code[2] = 0;
llc->llc_snap.ether_type = eh.ether_type;
M_PREPEND(m, sizeof(struct ieee80211_frame), M_DONTWAIT);
if (m == NULL)
goto bad;
wh = mtod(m, struct ieee80211_frame *);
wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_DATA;
*(u_int16_t *)wh->i_dur = 0;
*(u_int16_t *)wh->i_seq =
htole16(ni->ni_txseq << IEEE80211_SEQ_SEQ_SHIFT);
ni->ni_txseq++;
switch (ic->ic_opmode) {
case IEEE80211_M_STA:
wh->i_fc[1] = IEEE80211_FC1_DIR_TODS;
IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_bssid);
IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_dhost);
break;
case IEEE80211_M_IBSS:
case IEEE80211_M_AHDEMO:
wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
IEEE80211_ADDR_COPY(wh->i_addr2, eh.ether_shost);
IEEE80211_ADDR_COPY(wh->i_addr3, ni->ni_bssid);
break;
case IEEE80211_M_HOSTAP:
wh->i_fc[1] = IEEE80211_FC1_DIR_FROMDS;
IEEE80211_ADDR_COPY(wh->i_addr1, eh.ether_dhost);
IEEE80211_ADDR_COPY(wh->i_addr2, ni->ni_bssid);
IEEE80211_ADDR_COPY(wh->i_addr3, eh.ether_shost);
break;
case IEEE80211_M_MONITOR:
goto bad;
}
*pni = ni;
return m;
bad:
if (m != NULL)
m_freem(m);
if (ni && ni != ic->ic_bss)
ieee80211_free_node(ic, ni);
*pni = NULL;
return NULL;
}
/*
* Add a supported rates element id to a frame.
*/
u_int8_t *
ieee80211_add_rates(u_int8_t *frm, const struct ieee80211_rateset *rs)
{
int nrates;
*frm++ = IEEE80211_ELEMID_RATES;
nrates = rs->rs_nrates;
if (nrates > IEEE80211_RATE_SIZE)
nrates = IEEE80211_RATE_SIZE;
*frm++ = nrates;
memcpy(frm, rs->rs_rates, nrates);
return frm + nrates;
}
/*
* Add an extended supported rates element id to a frame.
*/
u_int8_t *
ieee80211_add_xrates(u_int8_t *frm, const struct ieee80211_rateset *rs)
{
/*
* Add an extended supported rates element if operating in 11g mode.
*/
if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
int nrates = rs->rs_nrates - IEEE80211_RATE_SIZE;
*frm++ = IEEE80211_ELEMID_XRATES;
*frm++ = nrates;
memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates);
frm += nrates;
}
return frm;
}
/*
* Add an ssid elemet to a frame.
*/
static u_int8_t *
ieee80211_add_ssid(u_int8_t *frm, const u_int8_t *ssid, u_int len)
{
*frm++ = IEEE80211_ELEMID_SSID;
*frm++ = len;
memcpy(frm, ssid, len);
return frm + len;
}
static struct mbuf *
ieee80211_getmbuf(int flags, int type, u_int pktlen)
{
struct mbuf *m;
if (pktlen > MHLEN)
MGETHDR(m, flags, type);
else
m = m_getcl(flags, type, M_PKTHDR);
return m;
}
/*
* Send a management frame. The node is for the destination (or ic_bss
* when in station mode). Nodes other than ic_bss have their reference
* count bumped to reflect our use for an indeterminant time.
*/
int
ieee80211_send_mgmt(struct ieee80211com *ic, struct ieee80211_node *ni,
int type, int arg)
{
#define senderr(_x) do { ret = _x; goto bad; } while (0)
struct ifnet *ifp = &ic->ic_if;
struct mbuf *m;
u_int8_t *frm;
enum ieee80211_phymode mode;
u_int16_t capinfo;
int ret, timer;
KASSERT(ni != NULL, ("null node"));
/*
* Hold a reference on the node so it doesn't go away until after
* the xmit is complete all the way in the driver. On error we
* will remove our reference.
*/
if (ni != ic->ic_bss)
ieee80211_ref_node(ni);
timer = 0;
switch (type) {
case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
/*
* prreq frame format
* [tlv] ssid
* [tlv] supported rates
* [tlv] extended supported rates
*/
m = ieee80211_getmbuf(M_DONTWAIT, MT_DATA,
2 + ic->ic_des_esslen
+ 2 + IEEE80211_RATE_SIZE
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE));
if (m == NULL)
senderr(ENOMEM);
m->m_data += sizeof(struct ieee80211_frame);
frm = mtod(m, u_int8_t *);
frm = ieee80211_add_ssid(frm, ic->ic_des_essid, ic->ic_des_esslen);
mode = ieee80211_chan2mode(ic, ni->ni_chan);
frm = ieee80211_add_rates(frm, &ic->ic_sup_rates[mode]);
frm = ieee80211_add_xrates(frm, &ic->ic_sup_rates[mode]);
m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *);
timer = IEEE80211_TRANS_WAIT;
break;
case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
/*
* probe response frame format
* [8] time stamp
* [2] beacon interval
* [2] cabability information
* [tlv] ssid
* [tlv] supported rates
* [tlv] parameter set (IBSS)
* [tlv] extended supported rates
*/
m = ieee80211_getmbuf(M_DONTWAIT, MT_DATA,
8 + 2 + 2 + 2
+ 2 + ni->ni_esslen
+ 2 + IEEE80211_RATE_SIZE
+ 6
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE));
if (m == NULL)
senderr(ENOMEM);
m->m_data += sizeof(struct ieee80211_frame);
frm = mtod(m, u_int8_t *);
memset(frm, 0, 8); /* timestamp should be filled later */
frm += 8;
*(u_int16_t *)frm = htole16(ic->ic_bss->ni_intval);
frm += 2;
if (ic->ic_opmode == IEEE80211_M_IBSS)
capinfo = IEEE80211_CAPINFO_IBSS;
else
capinfo = IEEE80211_CAPINFO_ESS;
if (ic->ic_flags & IEEE80211_F_WEPON)
capinfo |= IEEE80211_CAPINFO_PRIVACY;
*(u_int16_t *)frm = htole16(capinfo);
frm += 2;
frm = ieee80211_add_ssid(frm, ic->ic_bss->ni_essid,
ic->ic_bss->ni_esslen);
frm = ieee80211_add_rates(frm, &ic->ic_bss->ni_rates);
if (ic->ic_opmode == IEEE80211_M_IBSS) {
*frm++ = IEEE80211_ELEMID_IBSSPARMS;
*frm++ = 2;
*frm++ = 0; *frm++ = 0; /* TODO: ATIM window */
} else { /* IEEE80211_M_HOSTAP */
/* TODO: TIM */
*frm++ = IEEE80211_ELEMID_TIM;
*frm++ = 4; /* length */
*frm++ = 0; /* DTIM count */
*frm++ = 1; /* DTIM period */
*frm++ = 0; /* bitmap control */
*frm++ = 0; /* Partial Virtual Bitmap (variable length) */
}
frm = ieee80211_add_xrates(frm, &ic->ic_bss->ni_rates);
m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *);
break;
case IEEE80211_FC0_SUBTYPE_AUTH:
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL)
senderr(ENOMEM);
MH_ALIGN(m, 2 * 3);
m->m_pkthdr.len = m->m_len = 6;
frm = mtod(m, u_int8_t *);
/* TODO: shared key auth */
((u_int16_t *)frm)[0] = htole16(IEEE80211_AUTH_ALG_OPEN);
((u_int16_t *)frm)[1] = htole16(arg); /* sequence number */
((u_int16_t *)frm)[2] = 0; /* status */
if (ic->ic_opmode == IEEE80211_M_STA)
timer = IEEE80211_TRANS_WAIT;
break;
case IEEE80211_FC0_SUBTYPE_DEAUTH:
if (ifp->if_flags & IFF_DEBUG)
if_printf(ifp, "station %s deauthenticate (reason %d)\n",
ether_sprintf(ni->ni_macaddr), arg);
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL)
senderr(ENOMEM);
MH_ALIGN(m, 2);
m->m_pkthdr.len = m->m_len = 2;
*mtod(m, u_int16_t *) = htole16(arg); /* reason */
break;
case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
/*
* asreq frame format
* [2] capability information
* [2] listen interval
* [6*] current AP address (reassoc only)
* [tlv] ssid
* [tlv] supported rates
* [tlv] extended supported rates
*/
m = ieee80211_getmbuf(M_DONTWAIT, MT_DATA,
sizeof(capinfo)
+ sizeof(u_int16_t)
+ IEEE80211_ADDR_LEN
+ 2 + ni->ni_esslen
+ 2 + IEEE80211_RATE_SIZE
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE));
if (m == NULL)
senderr(ENOMEM);
m->m_data += sizeof(struct ieee80211_frame);
frm = mtod(m, u_int8_t *);
capinfo = 0;
if (ic->ic_opmode == IEEE80211_M_IBSS)
capinfo |= IEEE80211_CAPINFO_IBSS;
else /* IEEE80211_M_STA */
capinfo |= IEEE80211_CAPINFO_ESS;
if (ic->ic_flags & IEEE80211_F_WEPON)
capinfo |= IEEE80211_CAPINFO_PRIVACY;
if (ic->ic_flags & IEEE80211_F_SHPREAMBLE)
capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE;
if (ic->ic_flags & IEEE80211_F_SHSLOT)
capinfo |= IEEE80211_CAPINFO_SHORT_SLOTTIME;
*(u_int16_t *)frm = htole16(capinfo);
frm += 2;
*(u_int16_t *)frm = htole16(ic->ic_lintval);
frm += 2;
if (type == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
IEEE80211_ADDR_COPY(frm, ic->ic_bss->ni_bssid);
frm += IEEE80211_ADDR_LEN;
}
frm = ieee80211_add_ssid(frm, ni->ni_essid, ni->ni_esslen);
frm = ieee80211_add_rates(frm, &ni->ni_rates);
frm = ieee80211_add_xrates(frm, &ni->ni_rates);
m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *);
timer = IEEE80211_TRANS_WAIT;
break;
case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
/*
* asreq frame format
* [2] capability information
* [2] status
* [2] association ID
* [tlv] supported rates
* [tlv] extended supported rates
*/
m = ieee80211_getmbuf(M_DONTWAIT, MT_DATA,
sizeof(capinfo)
+ sizeof(u_int16_t)
+ sizeof(u_int16_t)
+ 2 + IEEE80211_RATE_SIZE
+ 2 + (IEEE80211_RATE_MAXSIZE - IEEE80211_RATE_SIZE));
if (m == NULL)
senderr(ENOMEM);
m->m_data += sizeof(struct ieee80211_frame);
frm = mtod(m, u_int8_t *);
capinfo = IEEE80211_CAPINFO_ESS;
if (ic->ic_flags & IEEE80211_F_WEPON)
capinfo |= IEEE80211_CAPINFO_PRIVACY;
*(u_int16_t *)frm = htole16(capinfo);
frm += 2;
*(u_int16_t *)frm = htole16(arg); /* status */
frm += 2;
if (arg == IEEE80211_STATUS_SUCCESS)
*(u_int16_t *)frm = htole16(ni->ni_associd);
frm += 2;
frm = ieee80211_add_rates(frm, &ni->ni_rates);
frm = ieee80211_add_xrates(frm, &ni->ni_rates);
m->m_pkthdr.len = m->m_len = frm - mtod(m, u_int8_t *);
break;
case IEEE80211_FC0_SUBTYPE_DISASSOC:
if (ifp->if_flags & IFF_DEBUG)
if_printf(ifp, "station %s disassociate (reason %d)\n",
ether_sprintf(ni->ni_macaddr), arg);
MGETHDR(m, M_DONTWAIT, MT_DATA);
if (m == NULL)
senderr(ENOMEM);
MH_ALIGN(m, 2);
m->m_pkthdr.len = m->m_len = 2;
*mtod(m, u_int16_t *) = htole16(arg); /* reason */
break;
default:
IEEE80211_DPRINTF(("%s: invalid mgmt frame type %u\n",
__func__, type));
senderr(EINVAL);
/* NOTREACHED */
}
ret = ieee80211_mgmt_output(ifp, ni, m, type);
if (ret == 0) {
if (timer)
ic->ic_mgt_timer = timer;
} else {
bad:
if (ni != ic->ic_bss) /* remove ref we added */
ieee80211_free_node(ic, ni);
}
return ret;
#undef senderr
}

503
sys/net80211/ieee80211_proto.c Normal file
View File

@ -0,0 +1,503 @@
/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002, 2003 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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: src/sys/net80211/ieee80211_proto.c,v 1.3 2003/07/20 21:36:08 sam Exp $");
/*
* IEEE 802.11 protocol support.
*/
#include "opt_inet.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/bus.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <machine/atomic.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_llc.h>
#include <net80211/ieee80211_var.h>
#include <net/bpf.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/if_ether.h>
#endif
#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2)
const char *ieee80211_mgt_subtype_name[] = {
"assoc_req", "assoc_resp", "reassoc_req", "reassoc_resp",
"probe_req", "probe_resp", "reserved#6", "reserved#7",
"beacon", "atim", "disassoc", "auth",
"deauth", "reserved#13", "reserved#14", "reserved#15"
};
const char *ieee80211_state_name[IEEE80211_S_MAX] = {
"INIT", /* IEEE80211_S_INIT */
"SCAN", /* IEEE80211_S_SCAN */
"AUTH", /* IEEE80211_S_AUTH */
"ASSOC", /* IEEE80211_S_ASSOC */
"RUN" /* IEEE80211_S_RUN */
};
static int ieee80211_newstate(struct ieee80211com *, enum ieee80211_state, int);
void
ieee80211_proto_attach(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
ifp->if_hdrlen = sizeof(struct ieee80211_frame);
#ifdef notdef
ic->ic_rtsthreshold = IEEE80211_RTS_DEFAULT;
#else
ic->ic_rtsthreshold = IEEE80211_RTS_MAX;
#endif
ic->ic_fragthreshold = 2346; /* XXX not used yet */
ic->ic_fixed_rate = -1; /* no fixed rate */
mtx_init(&ic->ic_mgtq.ifq_mtx, ifp->if_name, "mgmt send q", MTX_DEF);
/* protocol state change handler */
ic->ic_newstate = ieee80211_newstate;
/* initialize management frame handlers */
ic->ic_recv_mgmt = ieee80211_recv_mgmt;
ic->ic_send_mgmt = ieee80211_send_mgmt;
}
void
ieee80211_proto_detach(struct ifnet *ifp)
{
struct ieee80211com *ic = (void *)ifp;
IF_DRAIN(&ic->ic_mgtq);
mtx_destroy(&ic->ic_mgtq.ifq_mtx);
}
void
ieee80211_print_essid(u_int8_t *essid, int len)
{
int i;
u_int8_t *p;
if (len > IEEE80211_NWID_LEN)
len = IEEE80211_NWID_LEN;
/* determine printable or not */
for (i = 0, p = essid; i < len; i++, p++) {
if (*p < ' ' || *p > 0x7e)
break;
}
if (i == len) {
printf("\"");
for (i = 0, p = essid; i < len; i++, p++)
printf("%c", *p);
printf("\"");
} else {
printf("0x");
for (i = 0, p = essid; i < len; i++, p++)
printf("%02x", *p);
}
}
void
ieee80211_dump_pkt(u_int8_t *buf, int len, int rate, int rssi)
{
struct ieee80211_frame *wh;
int i;
wh = (struct ieee80211_frame *)buf;
switch (wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) {
case IEEE80211_FC1_DIR_NODS:
printf("NODS %s", ether_sprintf(wh->i_addr2));
printf("->%s", ether_sprintf(wh->i_addr1));
printf("(%s)", ether_sprintf(wh->i_addr3));
break;
case IEEE80211_FC1_DIR_TODS:
printf("TODS %s", ether_sprintf(wh->i_addr2));
printf("->%s", ether_sprintf(wh->i_addr3));
printf("(%s)", ether_sprintf(wh->i_addr1));
break;
case IEEE80211_FC1_DIR_FROMDS:
printf("FRDS %s", ether_sprintf(wh->i_addr3));
printf("->%s", ether_sprintf(wh->i_addr1));
printf("(%s)", ether_sprintf(wh->i_addr2));
break;
case IEEE80211_FC1_DIR_DSTODS:
printf("DSDS %s", ether_sprintf((u_int8_t *)&wh[1]));
printf("->%s", ether_sprintf(wh->i_addr3));
printf("(%s", ether_sprintf(wh->i_addr2));
printf("->%s)", ether_sprintf(wh->i_addr1));
break;
}
switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
case IEEE80211_FC0_TYPE_DATA:
printf(" data");
break;
case IEEE80211_FC0_TYPE_MGT:
printf(" %s", ieee80211_mgt_subtype_name[
(wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK)
>> IEEE80211_FC0_SUBTYPE_SHIFT]);
break;
default:
printf(" type#%d", wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK);
break;
}
if (wh->i_fc[1] & IEEE80211_FC1_WEP)
printf(" WEP");
if (rate >= 0)
printf(" %dM", rate / 2);
if (rssi >= 0)
printf(" +%d", rssi);
printf("\n");
if (len > 0) {
for (i = 0; i < len; i++) {
if ((i & 1) == 0)
printf(" ");
printf("%02x", buf[i]);
}
printf("\n");
}
}
int
ieee80211_fix_rate(struct ieee80211com *ic, struct ieee80211_node *ni, int flags)
{
#define RV(v) ((v) & IEEE80211_RATE_VAL)
int i, j, ignore, error;
int okrate, badrate;
struct ieee80211_rateset *srs, *nrs;
u_int8_t r;
error = 0;
okrate = badrate = 0;
srs = &ic->ic_sup_rates[ieee80211_chan2mode(ic, ni->ni_chan)];
nrs = &ni->ni_rates;
for (i = 0; i < ni->ni_rates.rs_nrates; ) {
ignore = 0;
if (flags & IEEE80211_F_DOSORT) {
/*
* Sort rates.
*/
for (j = i + 1; j < nrs->rs_nrates; j++) {
if (RV(nrs->rs_rates[i]) > RV(nrs->rs_rates[j])) {
r = nrs->rs_rates[i];
nrs->rs_rates[i] = nrs->rs_rates[j];
nrs->rs_rates[j] = r;
}
}
}
r = nrs->rs_rates[i] & IEEE80211_RATE_VAL;
badrate = r;
if (flags & IEEE80211_F_DOFRATE) {
/*
* Apply fixed rate constraint. Note that we do
* not apply the constraint to basic rates as
* otherwise we may not be able to associate if
* the rate set we submit to the AP is invalid
* (e.g. fix rate at 36Mb/s which is not a basic
* rate for 11a operation).
*/
if ((nrs->rs_rates[i] & IEEE80211_RATE_BASIC) == 0 &&
ic->ic_fixed_rate >= 0 &&
r != RV(srs->rs_rates[ic->ic_fixed_rate]))
ignore++;
}
if (flags & IEEE80211_F_DONEGO) {
/*
* Check against supported rates.
*/
for (j = 0; j < srs->rs_nrates; j++) {
if (r == RV(srs->rs_rates[j]))
break;
}
if (j == srs->rs_nrates) {
if (nrs->rs_rates[i] & IEEE80211_RATE_BASIC)
error++;
ignore++;
}
}
if (flags & IEEE80211_F_DODEL) {
/*
* Delete unacceptable rates.
*/
if (ignore) {
nrs->rs_nrates--;
for (j = i; j < nrs->rs_nrates; j++)
nrs->rs_rates[j] = nrs->rs_rates[j + 1];
nrs->rs_rates[j] = 0;
continue;
}
}
if (!ignore)
okrate = nrs->rs_rates[i];
i++;
}
if (okrate == 0 || error != 0)
return badrate | IEEE80211_RATE_BASIC;
else
return RV(okrate);
#undef RV
}
static int
ieee80211_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int mgt)
{
struct ifnet *ifp = &ic->ic_if;
struct ieee80211_node *ni;
enum ieee80211_state ostate;
ostate = ic->ic_state;
IEEE80211_DPRINTF(("%s: %s -> %s\n", __func__,
ieee80211_state_name[ostate], ieee80211_state_name[nstate]));
ic->ic_state = nstate; /* state transition */
ni = ic->ic_bss; /* NB: no reference held */
switch (nstate) {
case IEEE80211_S_INIT:
switch (ostate) {
case IEEE80211_S_INIT:
break;
case IEEE80211_S_RUN:
switch (ic->ic_opmode) {
case IEEE80211_M_STA:
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_DISASSOC,
IEEE80211_REASON_ASSOC_LEAVE);
break;
case IEEE80211_M_HOSTAP:
mtx_lock(&ic->ic_nodelock);
TAILQ_FOREACH(ni, &ic->ic_node, ni_list) {
if (ni->ni_associd == 0)
continue;
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_DISASSOC,
IEEE80211_REASON_ASSOC_LEAVE);
}
mtx_unlock(&ic->ic_nodelock);
break;
default:
break;
}
/* FALLTHRU */
case IEEE80211_S_ASSOC:
switch (ic->ic_opmode) {
case IEEE80211_M_STA:
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_DEAUTH,
IEEE80211_REASON_AUTH_LEAVE);
break;
case IEEE80211_M_HOSTAP:
mtx_lock(&ic->ic_nodelock);
TAILQ_FOREACH(ni, &ic->ic_node, ni_list) {
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_DEAUTH,
IEEE80211_REASON_AUTH_LEAVE);
}
mtx_unlock(&ic->ic_nodelock);
break;
default:
break;
}
/* FALLTHRU */
case IEEE80211_S_AUTH:
case IEEE80211_S_SCAN:
ic->ic_mgt_timer = 0;
IF_DRAIN(&ic->ic_mgtq);
if (ic->ic_wep_ctx != NULL) {
free(ic->ic_wep_ctx, M_DEVBUF);
ic->ic_wep_ctx = NULL;
}
ieee80211_free_allnodes(ic);
break;
}
break;
case IEEE80211_S_SCAN:
ic->ic_flags &= ~IEEE80211_F_SIBSS;
/* initialize bss for probe request */
IEEE80211_ADDR_COPY(ni->ni_macaddr, ifp->if_broadcastaddr);
IEEE80211_ADDR_COPY(ni->ni_bssid, ifp->if_broadcastaddr);
ni->ni_rates = ic->ic_sup_rates[
ieee80211_chan2mode(ic, ni->ni_chan)];
ni->ni_associd = 0;
ni->ni_rstamp = 0;
switch (ostate) {
case IEEE80211_S_INIT:
if (ic->ic_opmode == IEEE80211_M_HOSTAP &&
ic->ic_des_chan != IEEE80211_CHAN_ANYC) {
/*
* AP operation and we already have a channel;
* bypass the scan and startup immediately.
*/
ieee80211_create_ibss(ic, ic->ic_des_chan);
} else {
ieee80211_begin_scan(ifp);
}
break;
case IEEE80211_S_SCAN:
/* scan next */
if (ic->ic_flags & IEEE80211_F_ASCAN) {
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_PROBE_REQ, 0);
}
break;
case IEEE80211_S_RUN:
/* beacon miss */
if (ifp->if_flags & IFF_DEBUG) {
/* XXX bssid clobbered above */
if_printf(ifp, "no recent beacons from %s;"
" rescanning\n",
ether_sprintf(ic->ic_bss->ni_bssid));
}
ieee80211_free_allnodes(ic);
/* FALLTHRU */
case IEEE80211_S_AUTH:
case IEEE80211_S_ASSOC:
/* timeout restart scan */
ni = ieee80211_find_node(ic, ic->ic_bss->ni_macaddr);
if (ni != NULL) {
ni->ni_fails++;
ieee80211_unref_node(&ni);
}
ieee80211_begin_scan(ifp);
break;
}
break;
case IEEE80211_S_AUTH:
switch (ostate) {
case IEEE80211_S_INIT:
IEEE80211_DPRINTF(("%s: invalid transition\n",
__func__));
break;
case IEEE80211_S_SCAN:
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_AUTH, 1);
break;
case IEEE80211_S_AUTH:
case IEEE80211_S_ASSOC:
switch (mgt) {
case IEEE80211_FC0_SUBTYPE_AUTH:
/* ??? */
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_AUTH, 2);
break;
case IEEE80211_FC0_SUBTYPE_DEAUTH:
/* ignore and retry scan on timeout */
break;
}
break;
case IEEE80211_S_RUN:
switch (mgt) {
case IEEE80211_FC0_SUBTYPE_AUTH:
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_AUTH, 2);
ic->ic_state = ostate; /* stay RUN */
break;
case IEEE80211_FC0_SUBTYPE_DEAUTH:
/* try to reauth */
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_AUTH, 1);
break;
}
break;
}
break;
case IEEE80211_S_ASSOC:
switch (ostate) {
case IEEE80211_S_INIT:
case IEEE80211_S_SCAN:
case IEEE80211_S_ASSOC:
IEEE80211_DPRINTF(("%s: invalid transition\n",
__func__));
break;
case IEEE80211_S_AUTH:
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
break;
case IEEE80211_S_RUN:
IEEE80211_SEND_MGMT(ic, ni,
IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 1);
break;
}
break;
case IEEE80211_S_RUN:
switch (ostate) {
case IEEE80211_S_INIT:
case IEEE80211_S_AUTH:
case IEEE80211_S_RUN:
IEEE80211_DPRINTF(("%s: invalid transition\n",
__func__));
break;
case IEEE80211_S_SCAN: /* adhoc/hostap mode */
case IEEE80211_S_ASSOC: /* infra mode */
KASSERT(ni->ni_txrate < ni->ni_rates.rs_nrates,
("%s: bogus xmit rate %u setup\n", __func__,
ni->ni_txrate));
if (ifp->if_flags & IFF_DEBUG) {
if_printf(ifp, " ");
if (ic->ic_opmode == IEEE80211_M_STA)
printf("associated ");
else
printf("synchronized ");
printf("with %s ssid ",
ether_sprintf(ni->ni_bssid));
ieee80211_print_essid(ic->ic_bss->ni_essid,
ni->ni_esslen);
printf(" channel %d start %uMb\n",
ieee80211_chan2ieee(ic, ni->ni_chan),
IEEE80211_RATE2MBS(ni->ni_rates.rs_rates[ni->ni_txrate]));
}
ic->ic_mgt_timer = 0;
(*ifp->if_start)(ifp);
break;
}
break;
}
return 0;
}

78
sys/net80211/ieee80211_proto.h Normal file
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@ -0,0 +1,78 @@
/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002, 2003 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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.
*
* $FreeBSD: src/sys/net80211/ieee80211_proto.h,v 1.4 2003/08/19 22:17:03 sam Exp $
*/
#ifndef _NET80211_IEEE80211_PROTO_H_
#define _NET80211_IEEE80211_PROTO_H_
/*
* 802.11 protocol implementation definitions.
*/
enum ieee80211_state {
IEEE80211_S_INIT = 0, /* default state */
IEEE80211_S_SCAN = 1, /* scanning */
IEEE80211_S_AUTH = 2, /* try to authenticate */
IEEE80211_S_ASSOC = 3, /* try to assoc */
IEEE80211_S_RUN = 4, /* associated */
};
#define IEEE80211_S_MAX (IEEE80211_S_RUN+1)
#define IEEE80211_SEND_MGMT(_ic,_ni,_type,_arg) \
((*(_ic)->ic_send_mgmt)(_ic, _ni, _type, _arg))
extern const char *ieee80211_mgt_subtype_name[];
extern void ieee80211_proto_attach(struct ifnet *);
extern void ieee80211_proto_detach(struct ifnet *);
struct ieee80211_node;
extern void ieee80211_input(struct ifnet *, struct mbuf *,
struct ieee80211_node *, int, u_int32_t);
extern void ieee80211_recv_mgmt(struct ieee80211com *, struct mbuf *,
struct ieee80211_node *, int, int, u_int32_t);
extern int ieee80211_send_mgmt(struct ieee80211com *, struct ieee80211_node *,
int, int);
extern struct mbuf *ieee80211_encap(struct ifnet *, struct mbuf *,
struct ieee80211_node **);
extern struct mbuf *ieee80211_decap(struct ifnet *, struct mbuf *);
extern u_int8_t *ieee80211_add_rates(u_int8_t *frm,
const struct ieee80211_rateset *);
#define ieee80211_new_state(_ic, _nstate, _arg) \
(((_ic)->ic_newstate)((_ic), (_nstate), (_arg)))
extern u_int8_t *ieee80211_add_xrates(u_int8_t *frm,
const struct ieee80211_rateset *);
extern void ieee80211_print_essid(u_int8_t *, int);
extern void ieee80211_dump_pkt(u_int8_t *, int, int, int);
extern const char *ieee80211_state_name[IEEE80211_S_MAX];
#endif /* _NET80211_IEEE80211_PROTO_H_ */

265
sys/net80211/ieee80211_var.h Normal file
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/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002, 2003 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* 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.
*
* $FreeBSD: src/sys/net80211/ieee80211_var.h,v 1.5 2003/08/19 22:17:03 sam Exp $
*/
#ifndef _NET80211_IEEE80211_VAR_H_
#define _NET80211_IEEE80211_VAR_H_
/*
* Definitions for IEEE 802.11 drivers.
*/
#include <net80211/ieee80211.h>
#include <net80211/ieee80211_crypto.h>
#include <net80211/ieee80211_node.h>
#include <net80211/ieee80211_proto.h>
#define IEEE80211_CHAN_MAX 255
#define IEEE80211_CHAN_ANY 0xffff /* token for ``any channel'' */
#define IEEE80211_CHAN_ANYC \
((struct ieee80211_channel *) IEEE80211_CHAN_ANY)
enum ieee80211_phytype {
IEEE80211_T_DS, /* direct sequence spread spectrum */
IEEE80211_T_FH, /* frequency hopping */
IEEE80211_T_OFDM, /* frequency division multiplexing */
IEEE80211_T_TURBO, /* high rate OFDM, aka turbo mode */
};
#define IEEE80211_T_CCK IEEE80211_T_DS /* more common nomenclature */
/* XXX not really a mode; there are really multiple PHY's */
enum ieee80211_phymode {
IEEE80211_MODE_AUTO = 0, /* autoselect */
IEEE80211_MODE_11A = 1, /* 5GHz, OFDM */
IEEE80211_MODE_11B = 2, /* 2GHz, CCK */
IEEE80211_MODE_11G = 3, /* 2GHz, OFDM */
IEEE80211_MODE_TURBO = 4, /* 5GHz, OFDM, 2x clock */
};
#define IEEE80211_MODE_MAX (IEEE80211_MODE_TURBO+1)
enum ieee80211_opmode {
IEEE80211_M_STA = 1, /* infrastructure station */
IEEE80211_M_IBSS = 0, /* IBSS (adhoc) station */
IEEE80211_M_AHDEMO = 3, /* Old lucent compatible adhoc demo */
IEEE80211_M_HOSTAP = 6, /* Software Access Point */
IEEE80211_M_MONITOR = 8 /* Monitor mode */
};
/*
* Channels are specified by frequency and attributes.
*/
struct ieee80211_channel {
u_int16_t ic_freq; /* setting in Mhz */
u_int16_t ic_flags; /* see below */
};
/* bits 0-3 are for private use by drivers */
/* channel attributes */
#define IEEE80211_CHAN_TURBO 0x0010 /* Turbo channel */
#define IEEE80211_CHAN_CCK 0x0020 /* CCK channel */
#define IEEE80211_CHAN_OFDM 0x0040 /* OFDM channel */
#define IEEE80211_CHAN_2GHZ 0x0080 /* 2 GHz spectrum channel. */
#define IEEE80211_CHAN_5GHZ 0x0100 /* 5 GHz spectrum channel */
#define IEEE80211_CHAN_PASSIVE 0x0200 /* Only passive scan allowed */
#define IEEE80211_CHAN_DYN 0x0400 /* Dynamic CCK-OFDM channel */
/*
* Useful combinations of channel characteristics.
*/
#define IEEE80211_CHAN_A \
(IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM)
#define IEEE80211_CHAN_B \
(IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_CCK)
#define IEEE80211_CHAN_PUREG \
(IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_OFDM)
#define IEEE80211_CHAN_G \
(IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_DYN)
#define IEEE80211_CHAN_T \
(IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_OFDM | IEEE80211_CHAN_TURBO)
#define IEEE80211_IS_CHAN_A(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_A) == IEEE80211_CHAN_A)
#define IEEE80211_IS_CHAN_B(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_B) == IEEE80211_CHAN_B)
#define IEEE80211_IS_CHAN_PUREG(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_PUREG) == IEEE80211_CHAN_PUREG)
#define IEEE80211_IS_CHAN_G(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_G) == IEEE80211_CHAN_G)
#define IEEE80211_IS_CHAN_T(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_T) == IEEE80211_CHAN_T)
#define IEEE80211_IS_CHAN_2GHZ(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_2GHZ) != 0)
#define IEEE80211_IS_CHAN_5GHZ(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_5GHZ) != 0)
#define IEEE80211_IS_CHAN_OFDM(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_OFDM) != 0)
#define IEEE80211_IS_CHAN_CCK(_c) \
(((_c)->ic_flags & IEEE80211_CHAN_CCK) != 0)
/* ni_chan encoding for FH phy */
#define IEEE80211_FH_CHANMOD 80
#define IEEE80211_FH_CHAN(set,pat) (((set)-1)*IEEE80211_FH_CHANMOD+(pat))
#define IEEE80211_FH_CHANSET(chan) ((chan)/IEEE80211_FH_CHANMOD+1)
#define IEEE80211_FH_CHANPAT(chan) ((chan)%IEEE80211_FH_CHANMOD)
struct ieee80211com {
struct arpcom ic_ac;
void (*ic_recv_mgmt)(struct ieee80211com *,
struct mbuf *, struct ieee80211_node *,
int, int, u_int32_t);
int (*ic_send_mgmt)(struct ieee80211com *,
struct ieee80211_node *, int, int);
int (*ic_newstate)(struct ieee80211com *,
enum ieee80211_state, int);
void (*ic_newassoc)(struct ieee80211com *,
struct ieee80211_node *, int);
u_int8_t ic_myaddr[IEEE80211_ADDR_LEN];
struct ieee80211_rateset ic_sup_rates[IEEE80211_MODE_MAX];
struct ieee80211_channel ic_channels[IEEE80211_CHAN_MAX+1];
u_char ic_chan_avail[roundup(IEEE80211_CHAN_MAX,NBBY)];
u_char ic_chan_active[roundup(IEEE80211_CHAN_MAX, NBBY)];
u_char ic_chan_scan[roundup(IEEE80211_CHAN_MAX,NBBY)];
struct ifqueue ic_mgtq;
u_int32_t ic_flags; /* state flags */
u_int32_t ic_caps; /* capabilities */
u_int16_t ic_modecaps; /* set of mode capabilities */
u_int16_t ic_curmode; /* current mode */
enum ieee80211_phytype ic_phytype; /* XXX wrong for multi-mode */
enum ieee80211_opmode ic_opmode; /* operation mode */
enum ieee80211_state ic_state; /* 802.11 state */
struct ifmedia ic_media; /* interface media config */
struct bpf_if *ic_rawbpf; /* packet filter structure */
struct ieee80211_node *ic_bss; /* information for this node */
struct ieee80211_channel *ic_ibss_chan;
int ic_fixed_rate; /* index to ic_sup_rates[] */
u_int16_t ic_rtsthreshold;
u_int16_t ic_fragthreshold;
struct mtx ic_nodelock; /* on node table */
struct ieee80211_node *(*ic_node_alloc)(struct ieee80211com *);
void (*ic_node_free)(struct ieee80211com *,
struct ieee80211_node *);
void (*ic_node_copy)(struct ieee80211com *,
struct ieee80211_node *,
const struct ieee80211_node *);
TAILQ_HEAD(, ieee80211_node) ic_node; /* information of all nodes */
LIST_HEAD(, ieee80211_node) ic_hash[IEEE80211_NODE_HASHSIZE];
u_int16_t ic_lintval; /* listen interval */
u_int16_t ic_holdover; /* PM hold over duration */
u_int16_t ic_txmin; /* min tx retry count */
u_int16_t ic_txmax; /* max tx retry count */
u_int16_t ic_txlifetime; /* tx lifetime */
u_int16_t ic_txpower; /* tx power setting (dbM) */
u_int16_t ic_bmisstimeout;/* beacon miss threshold (ms) */
int ic_mgt_timer; /* mgmt timeout */
int ic_inact_timer; /* inactivity timer wait */
int ic_des_esslen;
u_int8_t ic_des_essid[IEEE80211_NWID_LEN];
struct ieee80211_channel *ic_des_chan; /* desired channel */
u_int8_t ic_des_bssid[IEEE80211_ADDR_LEN];
struct ieee80211_wepkey ic_nw_keys[IEEE80211_WEP_NKID];
int ic_wep_txkey; /* default tx key index */
void *ic_wep_ctx; /* wep crypt context */
u_int32_t ic_iv; /* initial vector for wep */
};
#define ic_if ic_ac.ac_if
#define ic_softc ic_if.if_softc
#define IEEE80211_ADDR_EQ(a1,a2) (memcmp(a1,a2,IEEE80211_ADDR_LEN) == 0)
#define IEEE80211_ADDR_COPY(dst,src) memcpy(dst,src,IEEE80211_ADDR_LEN)
/* ic_flags */
#define IEEE80211_F_ASCAN 0x00000001 /* STATUS: active scan */
#define IEEE80211_F_SIBSS 0x00000002 /* STATUS: start IBSS */
#define IEEE80211_F_WEPON 0x00000100 /* CONF: WEP enabled */
#define IEEE80211_F_IBSSON 0x00000200 /* CONF: IBSS creation enable */
#define IEEE80211_F_PMGTON 0x00000400 /* CONF: Power mgmt enable */
#define IEEE80211_F_DESBSSID 0x00000800 /* CONF: des_bssid is set */
#define IEEE80211_F_SCANAP 0x00001000 /* CONF: Scanning AP */
#define IEEE80211_F_ROAMING 0x00002000 /* CONF: roaming enabled */
#define IEEE80211_F_SWRETRY 0x00004000 /* CONF: sw tx retry enabled */
#define IEEE80211_F_TXPMGT 0x00018000 /* STATUS: tx power */
#define IEEE80211_F_TXPOW_OFF 0x00000000 /* TX Power: radio disabled */
#define IEEE80211_F_TXPOW_FIXED 0x00008000 /* TX Power: fixed rate */
#define IEEE80211_F_TXPOW_AUTO 0x00010000 /* TX Power: undefined */
#define IEEE80211_F_SHSLOT 0x00020000 /* CONF: short slot time */
#define IEEE80211_F_SHPREAMBLE 0x00040000 /* CONF: short preamble */
/* ic_capabilities */
#define IEEE80211_C_WEP 0x00000001 /* CAPABILITY: WEP available */
#define IEEE80211_C_IBSS 0x00000002 /* CAPABILITY: IBSS available */
#define IEEE80211_C_PMGT 0x00000004 /* CAPABILITY: Power mgmt */
#define IEEE80211_C_HOSTAP 0x00000008 /* CAPABILITY: HOSTAP avail */
#define IEEE80211_C_AHDEMO 0x00000010 /* CAPABILITY: Old Adhoc Demo */
#define IEEE80211_C_SWRETRY 0x00000020 /* CAPABILITY: sw tx retry */
#define IEEE80211_C_TXPMGT 0x00000040 /* CAPABILITY: tx power mgmt */
#define IEEE80211_C_SHSLOT 0x00000080 /* CAPABILITY: short slottime */
#define IEEE80211_C_SHPREAMBLE 0x00000100 /* CAPABILITY: short preamble */
#define IEEE80211_C_MONITOR 0x00000200 /* CAPABILITY: monitor mode */
/* flags for ieee80211_fix_rate() */
#define IEEE80211_F_DOSORT 0x00000001 /* sort rate list */
#define IEEE80211_F_DOFRATE 0x00000002 /* use fixed rate */
#define IEEE80211_F_DONEGO 0x00000004 /* calc negotiated rate */
#define IEEE80211_F_DODEL 0x00000008 /* delete ignore rate */
void ieee80211_ifattach(struct ifnet *);
void ieee80211_ifdetach(struct ifnet *);
void ieee80211_media_init(struct ifnet *, ifm_change_cb_t, ifm_stat_cb_t);
int ieee80211_media_change(struct ifnet *);
void ieee80211_media_status(struct ifnet *, struct ifmediareq *);
int ieee80211_ioctl(struct ifnet *, u_long, caddr_t);
int ieee80211_cfgget(struct ifnet *, u_long, caddr_t);
int ieee80211_cfgset(struct ifnet *, u_long, caddr_t);
void ieee80211_watchdog(struct ifnet *);
int ieee80211_fix_rate(struct ieee80211com *, struct ieee80211_node *, int);
int ieee80211_rate2media(struct ieee80211com *, int,
enum ieee80211_phymode);
int ieee80211_media2rate(int);
u_int ieee80211_mhz2ieee(u_int, u_int);
u_int ieee80211_chan2ieee(struct ieee80211com *, struct ieee80211_channel *);
u_int ieee80211_ieee2mhz(u_int, u_int);
int ieee80211_setmode(struct ieee80211com *, enum ieee80211_phymode);
enum ieee80211_phymode ieee80211_chan2mode(struct ieee80211com *,
struct ieee80211_channel *);
#define IEEE80211_DEBUG
#ifdef IEEE80211_DEBUG
extern int ieee80211_debug;
#define IEEE80211_DPRINTF(X) if (ieee80211_debug) printf X
#define IEEE80211_DPRINTF2(X) if (ieee80211_debug>1) printf X
#else
#define IEEE80211_DPRINTF(X)
#define IEEE80211_DPRINTF2(X)
#endif
#endif /* _NET80211_IEEE80211_VAR_H_ */