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madwifi/net80211/ieee80211.c
mentor d136b9b1f9 Edit token names for clarity, consistency and length. 
This changes some iwpriv names, because I believe they will be more readily usable and understandable


git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@3279 0192ed92-7a03-0410-a25b-9323aeb14dbd
2008-01-28 01:36:25 +00:00

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/*-
* Copyright (c) 2001 Atsushi Onoe
* Copyright (c) 2002-2005 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.
*
* $Id$
*/
#ifndef EXPORT_SYMTAB
#define EXPORT_SYMTAB
#endif
/*
* IEEE 802.11 generic handler
*/
#ifndef AUTOCONF_INCLUDED
#include <linux/config.h>
#endif
#include <linux/version.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/rtnetlink.h> /* XXX for rtnl_lock */
#include "if_media.h"
#include <net80211/ieee80211_var.h>
#include <net80211/if_athproto.h>
const char *ieee80211_phymode_name[] = {
"auto", /* IEEE80211_MODE_AUTO */
"11a", /* IEEE80211_MODE_11A */
"11b", /* IEEE80211_MODE_11B */
"11g", /* IEEE80211_MODE_11G */
"FH", /* IEEE80211_MODE_FH */
"turboA", /* IEEE80211_MODE_TURBO_A */
"turboG", /* IEEE80211_MODE_TURBO_G */
"staticTurboA", /* IEEE80211_MODE_TURBO_G */
};
EXPORT_SYMBOL(ieee80211_phymode_name);
static void ieee80211com_media_status(struct net_device*, struct ifmediareq *);
static int ieee80211com_media_change(struct net_device *);
static struct net_device_stats *ieee80211_getstats(struct net_device *);
static int ieee80211_change_mtu(struct net_device *, int);
static void ieee80211_set_multicast_list(struct net_device *);
static void ieee80211_expire_dfs_excl_timer(unsigned long);
MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
/*
* Country Code Table for code-to-string conversion.
*/
struct country_code_to_string {
u_int16_t iso_code;
const char *iso_name;
};
/*
* XXX: Ugly, since these must match defines in other modules.
*/
#define CTRY_DEBUG 0x1ff /* debug */
#define CTRY_DEFAULT 0 /* default */
static const struct country_code_to_string country_strings[] = {
{CTRY_DEBUG, "DB"},
{CTRY_DEFAULT, "NA"},
{CTRY_ALBANIA, "AL"},
{CTRY_ALGERIA, "DZ"},
{CTRY_ARGENTINA, "AR"},
{CTRY_ARMENIA, "AM"},
{CTRY_AUSTRALIA, "AU"},
{CTRY_AUSTRIA, "AT"},
{CTRY_AZERBAIJAN, "AZ"},
{CTRY_BAHRAIN, "BH"},
{CTRY_BELARUS, "BY"},
{CTRY_BELGIUM, "BE"},
{CTRY_BELIZE, "BZ"},
{CTRY_BOLIVIA, "BO"},
{CTRY_BRAZIL, "BR"},
{CTRY_BRUNEI_DARUSSALAM, "BN"},
{CTRY_BULGARIA, "BG"},
{CTRY_CANADA, "CA"},
{CTRY_CHILE, "CL"},
{CTRY_CHINA, "CN"},
{CTRY_COLOMBIA, "CO"},
{CTRY_COSTA_RICA, "CR"},
{CTRY_CROATIA, "HR"},
{CTRY_CYPRUS, "CY"},
{CTRY_CZECH, "CZ"},
{CTRY_DENMARK, "DK"},
{CTRY_DOMINICAN_REPUBLIC, "DO"},
{CTRY_ECUADOR, "EC"},
{CTRY_EGYPT, "EG"},
{CTRY_EL_SALVADOR, "SV"},
{CTRY_ESTONIA, "EE"},
{CTRY_FINLAND, "FI"},
{CTRY_FRANCE, "FR"},
{CTRY_FRANCE2, "F2"},
{CTRY_GEORGIA, "GE"},
{CTRY_GERMANY, "DE"},
{CTRY_GREECE, "GR"},
{CTRY_GUATEMALA, "GT"},
{CTRY_HONDURAS, "HN"},
{CTRY_HONG_KONG, "HK"},
{CTRY_HUNGARY, "HU"},
{CTRY_ICELAND, "IS"},
{CTRY_INDIA, "IN"},
{CTRY_INDONESIA, "ID"},
{CTRY_IRAN, "IR"},
{CTRY_IRELAND, "IE"},
{CTRY_ISRAEL, "IL"},
{CTRY_ITALY, "IT"},
{CTRY_JAPAN, "JP"},
{CTRY_JAPAN1, "J1"},
{CTRY_JAPAN2, "J2"},
{CTRY_JAPAN3, "J3"},
{CTRY_JAPAN4, "J4"},
{CTRY_JAPAN5, "J5"},
{CTRY_JAPAN7, "JP"},
{CTRY_JAPAN6, "JP"},
{CTRY_JAPAN8, "JP"},
{CTRY_JAPAN9, "JP"},
{CTRY_JAPAN10, "JP"},
{CTRY_JAPAN11, "JP"},
{CTRY_JAPAN12, "JP"},
{CTRY_JAPAN13, "JP"},
{CTRY_JAPAN14, "JP"},
{CTRY_JAPAN15, "JP"},
{CTRY_JAPAN16, "JP"},
{CTRY_JAPAN17, "JP"},
{CTRY_JAPAN18, "JP"},
{CTRY_JAPAN19, "JP"},
{CTRY_JAPAN20, "JP"},
{CTRY_JAPAN21, "JP"},
{CTRY_JAPAN22, "JP"},
{CTRY_JAPAN23, "JP"},
{CTRY_JAPAN24, "JP"},
{CTRY_JAPAN25, "JP"},
{CTRY_JAPAN26, "JP"},
{CTRY_JAPAN27, "JP"},
{CTRY_JAPAN28, "JP"},
{CTRY_JAPAN29, "JP"},
{CTRY_JAPAN30, "JP"},
{CTRY_JAPAN31, "JP"},
{CTRY_JAPAN32, "JP"},
{CTRY_JAPAN33, "JP"},
{CTRY_JAPAN34, "JP"},
{CTRY_JAPAN35, "JP"},
{CTRY_JAPAN36, "JP"},
{CTRY_JAPAN37, "JP"},
{CTRY_JAPAN38, "JP"},
{CTRY_JAPAN39, "JP"},
{CTRY_JAPAN40, "JP"},
{CTRY_JAPAN41, "JP"},
{CTRY_JAPAN42, "JP"},
{CTRY_JAPAN43, "JP"},
{CTRY_JAPAN44, "JP"},
{CTRY_JAPAN45, "JP"},
{CTRY_JAPAN46, "JP"},
{CTRY_JAPAN47, "JP"},
{CTRY_JAPAN48, "JP"},
{CTRY_JORDAN, "JO"},
{CTRY_KAZAKHSTAN, "KZ"},
{CTRY_KOREA_NORTH, "KP"},
{CTRY_KOREA_ROC, "KR"},
{CTRY_KOREA_ROC2, "K2"},
{CTRY_KUWAIT, "KW"},
{CTRY_LATVIA, "LV"},
{CTRY_LEBANON, "LB"},
{CTRY_LIECHTENSTEIN, "LI"},
{CTRY_LITHUANIA, "LT"},
{CTRY_LUXEMBOURG, "LU"},
{CTRY_MACAU, "MO"},
{CTRY_MACEDONIA, "MK"},
{CTRY_MALAYSIA, "MY"},
{CTRY_MEXICO, "MX"},
{CTRY_MONACO, "MC"},
{CTRY_MOROCCO, "MA"},
{CTRY_NETHERLANDS, "NL"},
{CTRY_NEW_ZEALAND, "NZ"},
{CTRY_NORWAY, "NO"},
{CTRY_OMAN, "OM"},
{CTRY_PAKISTAN, "PK"},
{CTRY_PANAMA, "PA"},
{CTRY_PERU, "PE"},
{CTRY_PHILIPPINES, "PH"},
{CTRY_POLAND, "PL"},
{CTRY_PORTUGAL, "PT"},
{CTRY_PUERTO_RICO, "PR"},
{CTRY_QATAR, "QA"},
{CTRY_ROMANIA, "RO"},
{CTRY_RUSSIA, "RU"},
{CTRY_SAUDI_ARABIA, "SA"},
{CTRY_SINGAPORE, "SG"},
{CTRY_SLOVAKIA, "SK"},
{CTRY_SLOVENIA, "SI"},
{CTRY_SOUTH_AFRICA, "ZA"},
{CTRY_SPAIN, "ES"},
{CTRY_SWEDEN, "SE"},
{CTRY_SWITZERLAND, "CH"},
{CTRY_SYRIA, "SY"},
{CTRY_TAIWAN, "TW"},
{CTRY_THAILAND, "TH"},
{CTRY_TRINIDAD_Y_TOBAGO, "TT"},
{CTRY_TUNISIA, "TN"},
{CTRY_TURKEY, "TR"},
{CTRY_UKRAINE, "UA"},
{CTRY_UAE, "AE"},
{CTRY_UNITED_KINGDOM, "GB"},
{CTRY_UNITED_STATES, "US"},
{CTRY_UNITED_STATES_FCC49, "US"},
{CTRY_URUGUAY, "UY"},
{CTRY_UZBEKISTAN, "UZ"},
{CTRY_VENEZUELA, "VE"},
{CTRY_VIET_NAM, "VN"},
{CTRY_YEMEN, "YE"},
{CTRY_ZIMBABWE, "ZW"}
};
int
ieee80211_ifattach(struct ieee80211com *ic)
{
struct net_device *dev = ic->ic_dev;
struct ieee80211_channel *c;
struct ifmediareq imr;
int i;
_MOD_INC_USE(THIS_MODULE, return -ENODEV);
/*
* Pick an initial operating mode until we have a vap
* created to lock it down correctly. This is only
* drivers have something defined for configuring the
* hardware at startup.
*/
ic->ic_opmode = IEEE80211_M_STA; /* everyone supports this */
/*
* Fill in 802.11 available channel set, mark
* all available channels as active, and pick
* a default channel if not already specified.
*/
KASSERT(0 < ic->ic_nchans && ic->ic_nchans < IEEE80211_CHAN_MAX,
("invalid number of channels specified: %u", ic->ic_nchans));
memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
ic->ic_modecaps |= 1 << IEEE80211_MODE_AUTO;
for (i = 0; i < ic->ic_nchans; i++) {
c = &ic->ic_channels[i];
KASSERT(c->ic_flags != 0, ("channel with no flags"));
KASSERT(c->ic_ieee < IEEE80211_CHAN_MAX,
("channel with bogus ieee number %u", c->ic_ieee));
setbit(ic->ic_chan_avail, c->ic_ieee);
/* 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_FHSS(c))
ic->ic_modecaps |= 1 << IEEE80211_MODE_FH;
if (IEEE80211_IS_CHAN_108A(c))
ic->ic_modecaps |= 1 << IEEE80211_MODE_TURBO_A;
if (IEEE80211_IS_CHAN_108G(c))
ic->ic_modecaps |= 1 << IEEE80211_MODE_TURBO_G;
}
/* Initialize candidate channels to all available */
memcpy(ic->ic_chan_active, ic->ic_chan_avail,
sizeof(ic->ic_chan_avail));
/* update Supported Channels information element */
ieee80211_build_sc_ie(ic);
/* Validate ic->ic_curmode */
if ((ic->ic_modecaps & (1 << ic->ic_curmode)) == 0)
ic->ic_curmode = IEEE80211_MODE_AUTO;
/*
* When 11g is supported, force the rate set to
* include basic rates suitable for a mixed b/g bss.
*/
if (ic->ic_modecaps & (1 << IEEE80211_MODE_11G))
ieee80211_set11gbasicrates(
&ic->ic_sup_rates[IEEE80211_MODE_11G],
IEEE80211_MODE_11G);
/* Setup initial channel settings */
ic->ic_bsschan = IEEE80211_CHAN_ANYC;
/* Arbitrarily pick the first channel */
ic->ic_curchan = &ic->ic_channels[0];
/* Enable marking of dfs by default */
ic->ic_flags_ext |= IEEE80211_FEXT_MARKDFS;
/* Enable WME by default, if we're capable. */
if (ic->ic_caps & IEEE80211_C_WME)
ic->ic_flags |= IEEE80211_F_WME;
(void) ieee80211_setmode(ic, ic->ic_curmode);
if (ic->ic_lintval == 0)
ic->ic_lintval = IEEE80211_BINTVAL_DEFAULT;
ic->ic_bmisstimeout = 7 * ic->ic_lintval; /* default 7 beacons */
IEEE80211_LOCK_INIT(ic, "ieee80211com");
IEEE80211_VAPS_LOCK_INIT(ic, "ieee80211com_vaps");
TAILQ_INIT(&ic->ic_vaps);
ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
ic->ic_txpowlimit = IEEE80211_TXPOWER_MIN;
ic->ic_newtxpowlimit = IEEE80211_TXPOWER_MAX;
init_timer(&ic->ic_dfs_excl_timer);
ic->ic_dfs_excl_timer.function =
ieee80211_expire_dfs_excl_timer;
ic->ic_dfs_excl_timer.data = (unsigned long) ic;
ieee80211_crypto_attach(ic);
ieee80211_node_attach(ic);
ieee80211_power_attach(ic);
ieee80211_proto_attach(ic);
ieee80211_scan_attach(ic);
ieee80211_media_setup(ic, &ic->ic_media, ic->ic_caps,
ieee80211com_media_change, ieee80211com_media_status);
ieee80211com_media_status(dev, &imr);
ifmedia_set(&ic->ic_media, imr.ifm_active);
return 0;
}
EXPORT_SYMBOL(ieee80211_ifattach);
void
ieee80211_ifdetach(struct ieee80211com *ic)
{
struct ieee80211vap *vap;
rtnl_lock();
while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
ic->ic_vap_delete(vap);
rtnl_unlock();
del_timer(&ic->ic_dfs_excl_timer);
ieee80211_scan_detach(ic);
ieee80211_proto_detach(ic);
ieee80211_crypto_detach(ic);
ieee80211_power_detach(ic);
ieee80211_node_detach(ic);
ifmedia_removeall(&ic->ic_media);
IEEE80211_VAPS_LOCK_DESTROY(ic);
IEEE80211_LOCK_DESTROY(ic);
_MOD_DEC_USE(THIS_MODULE);
}
EXPORT_SYMBOL(ieee80211_ifdetach);
int
ieee80211_vap_setup(struct ieee80211com *ic, struct net_device *dev,
const char *name, int opmode, int flags)
{
#define IEEE80211_C_OPMODE \
(IEEE80211_C_IBSS | IEEE80211_C_HOSTAP | IEEE80211_C_AHDEMO | \
IEEE80211_C_MONITOR)
struct ieee80211vap *vap = dev->priv;
struct net_device *parent = ic->ic_dev;
int err;
if (name != NULL) { /* XXX */
if (strchr(name, '%')) {
if ((err = dev_alloc_name(dev, name)) < 0) {
printk(KERN_ERR "can't alloc name %s\n", name);
return err;
}
} else
strncpy(dev->name, name, sizeof(dev->name));
}
dev->get_stats = ieee80211_getstats;
dev->open = ieee80211_open;
dev->stop = ieee80211_stop;
dev->hard_start_xmit = ieee80211_hardstart;
dev->set_multicast_list = ieee80211_set_multicast_list;
#if 0
dev->set_mac_address = ieee80211_set_mac_address;
#endif
dev->change_mtu = ieee80211_change_mtu;
dev->tx_queue_len = 0; /* NB: bypass queuing */
dev->hard_header_len = parent->hard_header_len;
/*
* The caller is assumed to allocate the device with
* alloc_etherdev or similar so we arrange for the
* space to be reclaimed accordingly.
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
/* In 2.4 things are done differently... */
dev->features |= NETIF_F_DYNALLOC;
#else
dev->destructor = free_netdev;
#endif
vap->iv_ic = ic;
vap->iv_dev = dev; /* back pointer */
vap->iv_xrvap = NULL;
vap->iv_flags = ic->ic_flags; /* propagate common flags */
vap->iv_flags_ext = ic->ic_flags_ext;
vap->iv_ath_cap = ic->ic_ath_cap;
vap->iv_mcast_rate = 1000; /* Default multicast traffic to lowest rate of 1Mbps */
#ifdef ATH_SUPERG_XR
/*
* Setup XR VAP specific flags.
* link the XR VAP to its normal val.
*/
if (flags & IEEE80211_VAP_XR) {
vap->iv_flags |= IEEE80211_F_XR; /* propagate common flags and add XR flag */
vap->iv_mcast_rate = 256; /* Default multicast rate to lowest possible 256 kbps */
}
#endif
vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
switch (opmode) {
case IEEE80211_M_STA:
/* WDS/Repeater */
if (flags & IEEE80211_NO_STABEACONS)
vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
break;
case IEEE80211_M_IBSS:
vap->iv_caps |= IEEE80211_C_IBSS;
vap->iv_ath_cap &= ~IEEE80211_ATHC_XR;
break;
case IEEE80211_M_AHDEMO:
vap->iv_caps |= IEEE80211_C_AHDEMO;
vap->iv_ath_cap &= ~IEEE80211_ATHC_XR;
break;
case IEEE80211_M_HOSTAP:
vap->iv_caps |= IEEE80211_C_HOSTAP;
vap->iv_ath_cap &= ~IEEE80211_ATHC_TURBOP;
if ((vap->iv_flags & IEEE80211_VAP_XR) == 0)
vap->iv_ath_cap &= ~IEEE80211_ATHC_XR;
break;
case IEEE80211_M_MONITOR:
vap->iv_caps |= IEEE80211_C_MONITOR;
vap->iv_ath_cap &= ~(IEEE80211_ATHC_XR | IEEE80211_ATHC_TURBOP);
break;
case IEEE80211_M_WDS:
vap->iv_caps |= IEEE80211_C_WDS;
vap->iv_ath_cap &= ~(IEEE80211_ATHC_XR | IEEE80211_ATHC_TURBOP);
vap->iv_flags_ext |= IEEE80211_FEXT_WDS;
break;
}
vap->iv_opmode = opmode;
IEEE80211_INIT_TQUEUE(&vap->iv_stajoin1tq, ieee80211_sta_join1_tasklet, vap);
vap->iv_chanchange_count = 0;
/* Enable various functionality by default, if we're capable. */
#ifdef ATH_WME /* Not yet the default */
if (vap->iv_caps & IEEE80211_C_WME)
vap->iv_flags |= IEEE80211_F_WME;
#endif
if (vap->iv_caps & IEEE80211_C_FF)
vap->iv_flags |= IEEE80211_F_FF;
/* NB: Background scanning only makes sense for station mode right now */
if (ic->ic_opmode == IEEE80211_M_STA &&
(vap->iv_caps & IEEE80211_C_BGSCAN))
vap->iv_flags |= IEEE80211_F_BGSCAN;
vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is OK */
vap->iv_monitor_crc_errors = 0;
vap->iv_monitor_phy_errors = 0;
IEEE80211_ADDR_COPY(vap->iv_myaddr, ic->ic_myaddr);
IEEE80211_ADDR_COPY(vap->iv_bssid, ic->ic_myaddr);
/* NB: Defer setting dev_addr so driver can override */
ieee80211_crypto_vattach(vap);
ieee80211_node_vattach(vap);
ieee80211_power_vattach(vap);
ieee80211_proto_vattach(vap);
ieee80211_scan_vattach(vap);
ieee80211_vlan_vattach(vap);
ieee80211_ioctl_vattach(vap);
return 1;
#undef IEEE80211_C_OPMODE
}
EXPORT_SYMBOL(ieee80211_vap_setup);
int
ieee80211_vap_attach(struct ieee80211vap *vap,
ifm_change_cb_t media_change, ifm_stat_cb_t media_status)
{
struct net_device *dev = vap->iv_dev;
struct ieee80211com *ic = vap->iv_ic;
struct ifmediareq imr;
ieee80211_node_latevattach(vap); /* XXX: move into vattach */
ieee80211_power_latevattach(vap); /* XXX: move into vattach */
memset(vap->wds_mac, 0x00, IEEE80211_ADDR_LEN);
(void) ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
media_change, media_status);
ieee80211_media_status(dev, &imr);
ifmedia_set(&vap->iv_media, imr.ifm_active);
IEEE80211_LOCK_IRQ(ic);
TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
IEEE80211_UNLOCK_IRQ(ic);
IEEE80211_ADDR_COPY(dev->dev_addr, vap->iv_myaddr);
#ifdef ATH_SUPERG_XR
/* Do not register XR VAP device with OS. */
if (vap->iv_flags & IEEE80211_F_XR)
return 0;
#endif
ieee80211_scanner_get(vap->iv_opmode, 1);
/* NB: rtnl_lock is held on entry, so don't use register_netdev */
if (register_netdevice(dev)) {
printk(KERN_ERR "%s: unable to register device\n", dev->name);
return 0;
}
/* SysFS needs to be initialised after the device, as it uses the
* device koject */
ieee80211_virtfs_latevattach(vap);
return 1;
}
EXPORT_SYMBOL(ieee80211_vap_attach);
void
ieee80211_vap_detach(struct ieee80211vap *vap)
{
struct ieee80211com *ic = vap->iv_ic;
struct net_device *dev = vap->iv_dev;
IEEE80211_CANCEL_TQUEUE(&vap->iv_stajoin1tq);
IEEE80211_LOCK_IRQ(ic);
TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
if (TAILQ_EMPTY(&ic->ic_vaps)) /* reset to supported mode */
ic->ic_opmode = IEEE80211_M_STA;
IEEE80211_UNLOCK_IRQ(ic);
ifmedia_removeall(&vap->iv_media);
ieee80211_virtfs_vdetach(vap);
ieee80211_proc_cleanup(vap);
ieee80211_ioctl_vdetach(vap);
ieee80211_vlan_vdetach(vap);
ieee80211_scan_vdetach(vap);
ieee80211_proto_vdetach(vap);
ieee80211_crypto_vdetach(vap);
ieee80211_power_vdetach(vap);
ieee80211_node_vdetach(vap);
#ifdef ATH_SUPERG_XR
/* XR VAP is not registered. */
if (!(vap->iv_flags & IEEE80211_F_XR))
#endif
/* NB: rtnl_lock is held on entry so don't use unregister_netdev */
unregister_netdevice(dev);
}
EXPORT_SYMBOL(ieee80211_vap_detach);
/*
* 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) /* Japan */
return 14;
if ((freq >= 2412) && (freq < 2484)) /* don't number non-IEEE channels */
return (freq - 2407) / 5;
return 0;
} else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
if ((freq >= 5150) && (freq <= 5825)) /* don't number non-IEEE channels */
return (freq - 5000) / 5;
return 0;
} else {
/* Something is fishy, don't do anything */
return 0;
}
}
EXPORT_SYMBOL(ieee80211_mhz2ieee);
/*
* Convert channel to IEEE channel number.
*/
u_int
ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
{
if (c == NULL) {
if_printf(ic->ic_dev, "invalid channel (NULL)\n");
return 0; /* XXX */
}
return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
}
EXPORT_SYMBOL(ieee80211_chan2ieee);
/*
* 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);
}
}
EXPORT_SYMBOL(ieee80211_ieee2mhz);
/*
* Locate a channel given a frequency+flags. We cache
* the previous lookup to optimize swithing between two
* channels--as happens with dynamic turbo.
*/
struct ieee80211_channel *
ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
{
struct ieee80211_channel *c;
int i;
/* Brute force search */
for (i = 0; i < ic->ic_nchans; i++) {
c = &ic->ic_channels[i];
if (c->ic_freq == freq &&
(flags == 0 ||
(c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags))
return c;
}
return NULL;
}
EXPORT_SYMBOL(ieee80211_find_channel);
/*
* 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.
*/
int
ieee80211_media_setup(struct ieee80211com *ic,
struct ifmedia *media, u_int32_t caps,
ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
{
#define ADD(_media, _s, _o) \
ifmedia_add(_media, IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
int i, j, mode, rate, maxrate, mword, mopt, r;
struct ieee80211_rateset *rs;
struct ieee80211_rateset allrates;
/* Fill in media characteristics. */
ifmedia_init(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_IEEE80211_11A,
IFM_IEEE80211_11B,
IFM_IEEE80211_11G,
IFM_IEEE80211_FH,
IFM_IEEE80211_11A | IFM_IEEE80211_TURBO,
IFM_IEEE80211_11G | IFM_IEEE80211_TURBO,
};
if ((ic->ic_modecaps & (1 << mode)) == 0)
continue;
mopt = mopts[mode];
ADD(media, IFM_AUTO, mopt); /* e.g. 11a auto */
if (caps & IEEE80211_C_IBSS)
ADD(media, IFM_AUTO, mopt | IFM_IEEE80211_ADHOC);
if (caps & IEEE80211_C_HOSTAP)
ADD(media, IFM_AUTO, mopt | IFM_IEEE80211_HOSTAP);
if (caps & IEEE80211_C_AHDEMO)
ADD(media, IFM_AUTO, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
if (caps & IEEE80211_C_MONITOR)
ADD(media, IFM_AUTO, mopt | IFM_IEEE80211_MONITOR);
if (caps & IEEE80211_C_WDS)
ADD(media, IFM_AUTO, mopt | IFM_IEEE80211_WDS);
if (mode == IEEE80211_MODE_AUTO)
continue;
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;
ADD(media, mword, mopt);
if (caps & IEEE80211_C_IBSS)
ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
if (caps & IEEE80211_C_HOSTAP)
ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
if (caps & IEEE80211_C_AHDEMO)
ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
if (caps & IEEE80211_C_MONITOR)
ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
if (caps & IEEE80211_C_WDS)
ADD(media, mword, mopt | IFM_IEEE80211_WDS);
/* 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;
}
}
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(media, mword, 0);
if (caps & IEEE80211_C_IBSS)
ADD(media, mword, IFM_IEEE80211_ADHOC);
if (caps & IEEE80211_C_HOSTAP)
ADD(media, mword, IFM_IEEE80211_HOSTAP);
if (caps & IEEE80211_C_AHDEMO)
ADD(media, mword, IFM_IEEE80211_ADHOC | IFM_FLAG0);
if (caps & IEEE80211_C_MONITOR)
ADD(media, mword, IFM_IEEE80211_MONITOR);
if (caps & IEEE80211_C_WDS)
ADD(media, mword, IFM_IEEE80211_WDS);
}
return maxrate;
#undef ADD
}
/*
* Perform the dfs action (channel switch) using scan cache or a randomly
* chosen channel. The choice of the fallback random channel is done in
* ieee80211_scan_dfs_action, when there are no scan cache results.
*
* This was moved out of ieee80211_mark_dfs, because the same functionality is
* used also in ieee80211_ioctl_chanswitch.
*/
void
ieee80211_dfs_action(struct ieee80211com *ic) {
struct ieee80211vap *vap;
/* Get an AP mode VAP */
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
if (vap->iv_state == IEEE80211_S_RUN) {
break;
}
}
if (vap == NULL) {
/*
* No running VAP was found, check
* if any one is scanning.
*/
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
if (vap->iv_state == IEEE80211_S_SCAN) {
break;
}
}
/* No running/scanning VAP was found, so they're all in
* INIT state, no channel change needed. */
if (vap == NULL)
return;
/* Is it really Scanning */
/* XXX: Race condition? */
if (ic->ic_flags & IEEE80211_F_SCAN)
return;
/* It is not scanning, but waiting for ath driver to move the
* vap to RUN. */
}
/* Check the scan results using only cached results */
if (!(ieee80211_check_scan(vap, IEEE80211_SCAN_NOSSID |
IEEE80211_SCAN_KEEPMODE |
IEEE80211_SCAN_USECACHE, 0,
vap->iv_des_nssid, vap->iv_des_ssid,
ieee80211_scan_dfs_action))) {
/* No channel was found, so call the scan action with no
* result. */
ieee80211_scan_dfs_action(vap, NULL);
}
}
void
ieee80211_expire_excl_restrictions(struct ieee80211com *ic)
{
struct ieee80211_channel* c = NULL;
struct net_device *dev = ic->ic_dev;
struct timeval tv_now;
int i;
do_gettimeofday(&tv_now);
for (i = 0; i < ic->ic_nchans; i++) {
c = &ic->ic_channels[i];
if (c->ic_flags & IEEE80211_CHAN_RADAR) {
if (timeval_compare(&ic->ic_chan_non_occupy[i],
&tv_now) < 0) {
if_printf(dev,
"Returning channel %3d (%4d MHz) "
"radar avoidance marker expired. "
"Channel now available again. -- "
"Time: %10ld.%06ld\n",
c->ic_ieee, c->ic_freq, tv_now.tv_sec,
tv_now.tv_usec);
c->ic_flags &= ~IEEE80211_CHAN_RADAR;
} else {
if_printf(dev,
"Channel %3d (%4d MHz) is still "
"marked for radar. Channel will "
"become usable in %u seconds at "
"Time: %10ld.%06ld\n",
c->ic_ieee, c->ic_freq,
ic->ic_chan_non_occupy[i].tv_sec -
tv_now.tv_sec,
ic->ic_chan_non_occupy[i].tv_sec,
ic->ic_chan_non_occupy[i].tv_usec);
}
}
}
}
EXPORT_SYMBOL(ieee80211_expire_excl_restrictions);
/* Update the Non-Occupancy Period timer with the first Non-Occupancy Period
* that will expire */
static void
ieee80211_update_dfs_excl_timer(struct ieee80211com *ic)
{
struct ieee80211_channel * chan;
struct timeval tv_now, tv_next;
int i;
unsigned long jiffies_tmp;
do_gettimeofday(&tv_now);
jiffies_tmp = jiffies;
tv_next.tv_sec = 0;
tv_next.tv_usec = 0;
for (i = 0; i < ic->ic_nchans; i++) {
chan = &ic->ic_channels[i];
if (chan->ic_flags & IEEE80211_CHAN_RADAR) {
if ((tv_next.tv_sec == 0) &&
(tv_next.tv_usec == 0)) {
tv_next = ic->ic_chan_non_occupy[i];
}
if (timeval_compare(&ic->ic_chan_non_occupy[i],
&tv_next) < 0) {
tv_next = ic->ic_chan_non_occupy[i];
}
}
}
if ((tv_next.tv_sec == 0) &&
(tv_next.tv_usec == 0)) {
del_timer(&ic->ic_dfs_excl_timer);
} else {
mod_timer(&ic->ic_dfs_excl_timer,
jiffies_tmp +
(tv_next.tv_sec - tv_now.tv_sec + 1) * HZ);
}
}
/* Periodically expire radar avoidance marks. */
static void
ieee80211_expire_dfs_excl_timer(unsigned long data)
{
struct ieee80211com *ic = (struct ieee80211com *) data;
struct ieee80211vap *vap;
printk(KERN_INFO "%s: %s: expiring Non-Occupancy Period\n",
DEV_NAME(ic->ic_dev), __func__);
if (ic->ic_flags_ext & IEEE80211_FEXT_MARKDFS) {
/* Make sure there are no channels that have just become
* available. */
ieee80211_expire_excl_restrictions(ic);
/* Go through and clear any interference flag we have, if we
* just got it cleared up for us */
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
/* We need to check for the special value
IEEE80211_CHAN_ANYC before using vap->iv_des_chan
since it will cause a kernel panic */
if ((vap->iv_state == IEEE80211_S_RUN) &&
((vap->iv_opmode == IEEE80211_M_HOSTAP) ||
(vap->iv_opmode == IEEE80211_M_IBSS)) &&
/* Operating on channel other than desired. */
(vap->iv_des_chan != IEEE80211_CHAN_ANYC) &&
(vap->iv_des_chan->ic_freq > 0) &&
(vap->iv_des_chan->ic_freq !=
ic->ic_bsschan->ic_freq)) {
struct ieee80211_channel *des_chan =
ieee80211_find_channel(ic,
vap->iv_des_chan->
ic_freq,
vap->iv_des_chan->
ic_flags);
/* Can we switch to it? */
if (NULL == des_chan) {
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_DOTH,
"%s: Desired channel "
"not found: %u/%x\n",
__func__,
vap->iv_des_chan->
ic_freq,
vap->iv_des_chan->
ic_flags);
} else if (!(des_chan->ic_flags &
IEEE80211_CHAN_RADAR)) {
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_DOTH,
"%s: Desired channel "
"found and available. "
"Switching to %u/%x\n",
__func__,
vap->iv_des_chan->
ic_freq,
vap->iv_des_chan->
ic_flags);
ic->ic_chanchange_chan =
des_chan->ic_ieee;
ic->ic_chanchange_tbtt =
IEEE80211_RADAR_CHANCHANGE_TBTT_COUNT;
ic->ic_flags |= IEEE80211_F_CHANSWITCH;
} else if (ieee80211_msg_is_reported(vap,
IEEE80211_MSG_DOTH)) {
/* Find the desired channel in
* ic_channels, so we can find the
* index into ic_chan_non_occupy. */
int i_des_chan = -1, i = 0;
for (i = 0; i < ic->ic_nchans; i++) {
if (&ic->ic_channels[i] ==
des_chan) {
i_des_chan = i;
break;
}
}
IEEE80211_DPRINTF(vap,
IEEE80211_MSG_DOTH,
"%s: Desired channel "
"found and not "
"available until Time: "
"%10ld.%06ld\n",
__func__,
ic->ic_chan_non_occupy
[i_des_chan].
tv_sec,
ic->ic_chan_non_occupy
[i_des_chan].
tv_usec
);
}
}
}
}
/* update the timer */
ieee80211_update_dfs_excl_timer(ic);
}
/* This function is called whenever a radar is detected on channel ichan */
void
ieee80211_mark_dfs(struct ieee80211com *ic, struct ieee80211_channel *ichan)
{
struct ieee80211_channel *c=NULL;
struct net_device *dev = ic->ic_dev;
struct timeval tv_now;
unsigned int excl_period = ic->ic_get_dfs_excl_period(ic);
int i;
do_gettimeofday(&tv_now);
if_printf(dev, "Radar found on channel %3d (%4d MHz) -- "
"Time: %ld.%06ld\n",
ichan->ic_ieee, ichan->ic_freq,
tv_now.tv_sec, tv_now.tv_usec);
if (IEEE80211_IS_MODE_DFS_MASTER(ic->ic_opmode)) {
/* Mark the channel in the ic_chan list */
if (ic->ic_flags_ext & IEEE80211_FEXT_MARKDFS) {
if_printf(dev, "Marking channel %3d (%4d MHz) in "
"ic_chan list -- Time: %ld.%06ld\n",
ichan->ic_ieee, ichan->ic_freq,
tv_now.tv_sec, tv_now.tv_usec);
for (i = 0; i < ic->ic_nchans; i++) {
c = &ic->ic_channels[i];
if (c->ic_freq == ichan->ic_freq) {
c->ic_flags |= IEEE80211_CHAN_RADAR;
ic->ic_chan_non_occupy[i].tv_sec =
tv_now.tv_sec + excl_period;
ic->ic_chan_non_occupy[i].tv_usec =
tv_now.tv_usec;
if_printf(dev, "Channel %3d (%4d MHz) "
"will become usable in %u "
"seconds. Suspending use of "
"the channel until: "
"%ld.%06ld\n",
ichan->ic_ieee, ichan->ic_freq,
excl_period,
ic->ic_chan_non_occupy[i].tv_sec,
ic->ic_chan_non_occupy[i].tv_usec);
}
}
/* Recompute the next time a Non-Occupancy Period
* expires. */
ieee80211_update_dfs_excl_timer(ic);
c = ieee80211_find_channel(ic, ichan->ic_freq,
ichan->ic_flags);
if (c == NULL) {
if_printf(dev, "%s: Couldn't find matching "
"channel for dfs chanchange "
"(%d, 0x%x)\n",
__func__, ichan->ic_freq,
ichan->ic_flags);
return;
}
if (ic->ic_curchan->ic_freq == c->ic_freq) {
if_printf(dev, "%s: Invoking "
"ieee80211_dfs_action "
"(%d, 0x%x)\n",
__func__, ichan->ic_freq,
ichan->ic_flags);
/* The current channel has been marked. We
* need to move away from it. */
ieee80211_dfs_action(ic);
} else
if_printf(dev,
"Unexpected channel frequency! "
"ichan=%3d (%4d MHz) "
"ic_curchan=%3d (%4d MHz). "
"Not invoking "
"ieee80211_dfs_action.\n",
ichan->ic_ieee,
ichan->ic_freq,
ic->ic_curchan->ic_ieee,
ic->ic_curchan->ic_freq);
} else {
/* Change to a radar free 11a channel for dfstesttime
* seconds. */
ic->ic_chanchange_chan = IEEE80211_RADAR_TEST_MUTE_CHAN;
ic->ic_chanchange_tbtt =
IEEE80211_RADAR_CHANCHANGE_TBTT_COUNT;
ic->ic_flags |= IEEE80211_F_CHANSWITCH;
if_printf(dev,
"Mute test - markdfs is off, we are "
"in hostap mode, found radar on "
"channel %3d (%4d MHz) "
"ic->ic_curchan=%3d (%4d MHz). "
"Not invoking ieee80211_dfs_action.\n",
ichan->ic_ieee, ichan->ic_freq,
ic->ic_curchan->ic_ieee,
ic->ic_curchan->ic_freq);
}
} else {
/* XXX: Are we in STA mode? If so, send an action msg. to AP
* saying we found a radar? */
}
}
EXPORT_SYMBOL(ieee80211_mark_dfs);
void
ieee80211_dfs_test_return(struct ieee80211com *ic, u_int8_t ieeeChan)
{
struct net_device *dev = ic->ic_dev;
/* Return to the original channel we were on before the test mute */
if_printf(dev, "Returning to channel %d\n", ieeeChan);
printk(KERN_DEBUG "Returning to chan %d\n", ieeeChan);
ic->ic_chanchange_chan = ieeeChan;
ic->ic_chanchange_tbtt = IEEE80211_RADAR_CHANCHANGE_TBTT_COUNT;
ic->ic_flags |= IEEE80211_F_CHANSWITCH;
}
EXPORT_SYMBOL(ieee80211_dfs_test_return);
void
ieee80211_announce(struct ieee80211com *ic)
{
struct net_device *dev = ic->ic_dev;
int i, mode, rate, mword;
struct ieee80211_rateset *rs;
for (mode = IEEE80211_MODE_11A; mode < IEEE80211_MODE_MAX; mode++) {
if ((ic->ic_modecaps & (1 << mode)) == 0)
continue;
if_printf(dev, "%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;
printk("%s%d%sMbps", (i != 0 ? " " : ""),
(rate & IEEE80211_RATE_VAL) / 2,
((rate & 0x1) != 0 ? ".5" : ""));
}
printk("\n");
}
if_printf(dev, "H/W encryption support:");
if (ic->ic_caps & IEEE80211_C_WEP)
printk(" WEP");
if (ic->ic_caps & IEEE80211_C_AES)
printk(" AES");
if (ic->ic_caps & IEEE80211_C_AES_CCM)
printk(" AES_CCM");
if (ic->ic_caps & IEEE80211_C_CKIP)
printk(" CKIP");
if (ic->ic_caps & IEEE80211_C_TKIP)
printk(" TKIP");
printk("\n");
}
EXPORT_SYMBOL(ieee80211_announce);
void
ieee80211_announce_channels(struct ieee80211com *ic)
{
const struct ieee80211_channel *c;
char type;
int i;
printk(KERN_INFO "Chan Freq RegPwr MinPwr MaxPwr\n");
for (i = 0; i < ic->ic_nchans; i++) {
c = &ic->ic_channels[i];
if (IEEE80211_IS_CHAN_ST(c))
type = 'S';
else if (IEEE80211_IS_CHAN_108A(c))
type = 'T';
else if (IEEE80211_IS_CHAN_108G(c))
type = 'G';
else if (IEEE80211_IS_CHAN_A(c))
type = 'a';
else if (IEEE80211_IS_CHAN_ANYG(c))
type = 'g';
else if (IEEE80211_IS_CHAN_B(c))
type = 'b';
else
type = 'f';
printk(KERN_INFO "%4d %4d%c %6d %6d %6d\n",
c->ic_ieee, c->ic_freq, type,
c->ic_maxregpower,
c->ic_minpower, c->ic_maxpower
);
}
}
EXPORT_SYMBOL(ieee80211_announce_channels);
/*
* Common code to calculate the media status word
* from the operating mode and channel state.
*/
static int
media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
{
int status;
status = IFM_IEEE80211;
switch (opmode) {
case IEEE80211_M_STA:
break;
case IEEE80211_M_AHDEMO:
status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
break;
case IEEE80211_M_IBSS:
status |= IFM_IEEE80211_ADHOC;
break;
case IEEE80211_M_HOSTAP:
status |= IFM_IEEE80211_HOSTAP;
break;
case IEEE80211_M_MONITOR:
status |= IFM_IEEE80211_MONITOR;
break;
case IEEE80211_M_WDS:
status |= IFM_IEEE80211_WDS;
break;
}
if (IEEE80211_IS_CHAN_A(chan)) {
status |= IFM_IEEE80211_11A;
if (IEEE80211_IS_CHAN_TURBO(chan))
status |= IFM_IEEE80211_TURBO;
} else if (IEEE80211_IS_CHAN_B(chan)) {
status |= IFM_IEEE80211_11B;
} else if (IEEE80211_IS_CHAN_ANYG(chan)) {
status |= IFM_IEEE80211_11G;
if (IEEE80211_IS_CHAN_TURBO(chan))
status |= IFM_IEEE80211_TURBO;
} else if (IEEE80211_IS_CHAN_FHSS(chan)) {
status |= IFM_IEEE80211_FH;
}
/* XXX: Otherwise complain? */
return status;
}
/*
* Handle a media requests on the base interface.
*/
static void
ieee80211com_media_status(struct net_device *dev, struct ifmediareq *imr)
{
struct ieee80211com *ic = dev->priv; /* XXX */
imr->ifm_status = IFM_AVALID;
if (!TAILQ_EMPTY(&ic->ic_vaps))
imr->ifm_status |= IFM_ACTIVE;
imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
}
/*
* Convert a media specification to an 802.11 PHY mode.
*/
static int
media2mode(const struct ifmedia_entry *ime, enum ieee80211_phymode *mode)
{
switch (IFM_MODE(ime->ifm_media)) {
case IFM_IEEE80211_11A:
*mode = IEEE80211_MODE_11A;
break;
case IFM_IEEE80211_11B:
*mode = IEEE80211_MODE_11B;
break;
case IFM_IEEE80211_11G:
*mode = IEEE80211_MODE_11G;
break;
case IFM_IEEE80211_FH:
*mode = IEEE80211_MODE_FH;
break;
case IFM_AUTO:
*mode = IEEE80211_MODE_AUTO;
break;
default:
return 0;
}
/*
* Turbo mode is an 'option'.
* XXX: Turbo currently does not apply to AUTO
*/
if (ime->ifm_media & IFM_IEEE80211_TURBO) {
if (*mode == IEEE80211_MODE_11A)
*mode = IEEE80211_MODE_TURBO_A;
else if (*mode == IEEE80211_MODE_11G)
*mode = IEEE80211_MODE_TURBO_G;
else
return 0;
}
return 1;
}
static int
ieee80211com_media_change(struct net_device *dev)
{
struct ieee80211com *ic = dev->priv; /* XXX */
struct ieee80211vap *vap;
struct ifmedia_entry *ime = ic->ic_media.ifm_cur;
enum ieee80211_phymode newphymode;
int j, error = 0;
/* XXX: Is rtnl_lock held here? */
/* First, identify the phy mode. */
if (!media2mode(ime, &newphymode))
return -EINVAL;
/* NB: Mode must be supported, no need to check */
/*
* 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 ((ic->ic_opmode == 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. */
IEEE80211_LOCK_IRQ(ic);
if (ic->ic_curmode != newphymode) { /* change PHY mode */
error = ieee80211_setmode(ic, newphymode);
if (error != 0) {
IEEE80211_UNLOCK_IRQ_EARLY(ic);
return error;
}
TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
/* Reset WME state */
ieee80211_wme_initparams_locked(vap);
/*
* Setup an initial rate set according to the
* current/default channel selected above. This
* will be changed when scanning but must exist
* now so drivers have a consistent state.
*/
KASSERT(vap->iv_bss != NULL, ("no bss node"));
vap->iv_bss->ni_rates = ic->ic_sup_rates[newphymode];
}
error = -ENETRESET;
}
IEEE80211_UNLOCK_IRQ(ic);
#ifdef notdef
if (error == 0)
ifp->if_baudrate = ifmedia_baudrate(ime->ifm_media);
#endif
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
}
/*
* Convert a media specification to a rate index and possibly a mode
* (if the rate is fixed and the mode is specified as 'auto' then
* we need to lock down the mode so the index is meaningful).
*/
static int
checkrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate)
{
/* Check the rate table for the specified/current PHY. */
if (mode == IEEE80211_MODE_AUTO) {
int i;
/* In autoselect mode search for the rate. */
for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) {
if ((ic->ic_modecaps & (1 << i)) &&
findrate(ic, i, rate) != -1)
return 1;
}
return 0;
} else {
/* Mode is fixed; check for rate. */
return (findrate(ic, mode, rate) != -1);
}
}
/*
* Handle a media change request; the only per-vap
* information that is meaningful is the fixed rate
* and desired PHY mode.
*/
int
ieee80211_media_change(struct net_device *dev)
{
struct ieee80211vap *vap = dev->priv;
struct ieee80211com *ic = vap->iv_ic;
struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
enum ieee80211_phymode newmode;
int newrate, error;
/* First, identify the desired PHY mode. */
if (!media2mode(ime, &newmode))
return -EINVAL;
/* Check for fixed/variable rate. */
if (IFM_SUBTYPE(ime->ifm_media) != IFM_AUTO) {
/*
* Convert media subtype to rate and potentially
* lock down the mode.
*/
newrate = ieee80211_media2rate(ime->ifm_media);
if ((newrate == 0) || !checkrate(ic, newmode, newrate))
return -EINVAL;
} else
newrate = IEEE80211_FIXED_RATE_NONE;
/* Install the rate & mode settings. */
error = 0;
if (vap->iv_fixed_rate != newrate) {
vap->iv_fixed_rate = newrate; /* fixed TX rate */
error = -ENETRESET;
}
if (vap->iv_des_mode != newmode) {
vap->iv_des_mode = newmode; /* desired PHY mode */
error = -ENETRESET;
}
return error;
}
EXPORT_SYMBOL(ieee80211_media_change);
void
ieee80211_media_status(struct net_device *dev, struct ifmediareq *imr)
{
struct ieee80211vap *vap = dev->priv;
struct ieee80211com *ic = vap->iv_ic;
enum ieee80211_phymode mode;
struct ieee80211_rateset *rs;
imr->ifm_status = IFM_AVALID;
/*
* NB: use the current channel's mode to lock down a xmit
* rate only when running; otherwise we may have a mismatch
* in which case the rate will not be convertible.
*/
if (vap->iv_state == IEEE80211_S_RUN) {
imr->ifm_status |= IFM_ACTIVE;
mode = ieee80211_chan2mode(ic->ic_curchan);
} else
mode = IEEE80211_MODE_AUTO;
imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
/* Calculate a current rate, if possible. */
if (vap->iv_fixed_rate != IEEE80211_FIXED_RATE_NONE) {
/* A fixed rate is set, report that. */
imr->ifm_active |= ieee80211_rate2media(ic,
vap->iv_fixed_rate, mode);
} else if (vap->iv_opmode == IEEE80211_M_STA) {
/* In station mode, report the current transmit rate. */
rs = &vap->iv_bss->ni_rates;
imr->ifm_active |= ieee80211_rate2media(ic,
rs->rs_rates[vap->iv_bss->ni_txrate], mode);
} else
imr->ifm_active |= IFM_AUTO;
}
EXPORT_SYMBOL(ieee80211_media_status);
/*
* Set the current PHY mode.
*/
int
ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
{
#if 0
/* Potentially invalidate the BSS channel. */
/* XXX not right/too conservative */
if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
mode != ieee80211_chan2mode(ic->ic_bsschan))
ic->ic_bsschan = IEEE80211_CHAN_ANYC; /* invalidate */
#endif
ieee80211_reset_erp(ic, mode); /* reset ERP state */
ic->ic_curmode = mode; /* NB: must do post reset_erp */
return 0;
}
EXPORT_SYMBOL(ieee80211_setmode);
/*
* Return the PHY mode for with the specified channel.
*/
enum ieee80211_phymode
ieee80211_chan2mode(const struct ieee80211_channel *chan)
{
/*
* Callers should handle this case properly, rather than
* just relying that this function returns a sane value.
* XXX: Probably needs to be revised.
*/
KASSERT(chan != IEEE80211_CHAN_ANYC, ("channel not setup"));
if (IEEE80211_IS_CHAN_108G(chan))
return IEEE80211_MODE_TURBO_G;
else if (IEEE80211_IS_CHAN_TURBO(chan))
return IEEE80211_MODE_TURBO_A;
else if (IEEE80211_IS_CHAN_A(chan))
return IEEE80211_MODE_11A;
else if (IEEE80211_IS_CHAN_ANYG(chan))
return IEEE80211_MODE_11G;
else if (IEEE80211_IS_CHAN_B(chan))
return IEEE80211_MODE_11B;
else if (IEEE80211_IS_CHAN_FHSS(chan))
return IEEE80211_MODE_FH;
/* NB: Should not get here */
printk(KERN_ERR "%s: cannot map channel to mode; freq %u flags 0x%x\n",
__func__, chan->ic_freq, chan->ic_flags);
return IEEE80211_MODE_11B;
}
EXPORT_SYMBOL(ieee80211_chan2mode);
/*
* 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)
{
static const struct {
u_int m; /* rate & mode */
u_int r; /* if_media rate */
} rates[] = {
{ 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
{ 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
{ 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
{ 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
{ 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
{ 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
{ 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
{ 3 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM1_50 },
{ 4 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM2_25 },
{ 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
{ 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4_50 },
{ 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
{ 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
{ 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
{ 27 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM13_5 },
{ 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
{ 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
{ 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
{ 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
{ 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
{ 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
{ 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
{ 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
{ 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
{ 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
{ 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
{ 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
{ 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
{ 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
{ 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
{ 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
{ 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
{ 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
/* NB: OFDM72 doesn't really 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_A:
mask |= IFM_IEEE80211_11A;
break;
case IEEE80211_MODE_11B:
mask |= IFM_IEEE80211_11B;
break;
case IEEE80211_MODE_FH:
mask |= IFM_IEEE80211_FH;
break;
case IEEE80211_MODE_AUTO:
/* NB: ic may be NULL for some drivers */
if (ic && (ic->ic_phytype == IEEE80211_T_FH)) {
mask |= IFM_IEEE80211_FH;
break;
}
/* NB: Hack, 11g matches both 11b & 11a rates */
/* *Fall through* */
case IEEE80211_MODE_11G:
case IEEE80211_MODE_TURBO_G:
mask |= IFM_IEEE80211_11G;
break;
}
for (i = 0; i < ARRAY_SIZE(rates); i++)
if (rates[i].m == mask)
return rates[i].r;
return IFM_AUTO;
}
EXPORT_SYMBOL(ieee80211_rate2media);
int
ieee80211_media2rate(int mword)
{
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 */
3, /* IFM_IEEE80211_OFDM1_50 */
4, /* IFM_IEEE80211_OFDM2_25 */
6, /* IFM_IEEE80211_OFDM3 */
9, /* IFM_IEEE80211_OFDM4_50 */
12, /* IFM_IEEE80211_OFDM6 */
18, /* IFM_IEEE80211_OFDM9 */
24, /* IFM_IEEE80211_OFDM12 */
27, /* IFM_IEEE80211_OFDM13_5 */
36, /* IFM_IEEE80211_OFDM18 */
48, /* IFM_IEEE80211_OFDM24 */
54, /* IFM_IEEE80211_OFDM27 */
72, /* IFM_IEEE80211_OFDM36 */
96, /* IFM_IEEE80211_OFDM48 */
108, /* IFM_IEEE80211_OFDM54 */
144, /* IFM_IEEE80211_OFDM72 */
};
return IFM_SUBTYPE(mword) < ARRAY_SIZE(ieeerates) ?
ieeerates[IFM_SUBTYPE(mword)] : 0;
}
EXPORT_SYMBOL(ieee80211_media2rate);
/*
* Return netdevice statistics.
*/
static struct net_device_stats *
ieee80211_getstats(struct net_device *dev)
{
struct ieee80211vap *vap = dev->priv;
struct net_device_stats *stats = &vap->iv_devstats;
/* XXX: Total guess as to what to count where */
/* Update according to private statistics */
stats->tx_errors = vap->iv_stats.is_tx_nodefkey
+ vap->iv_stats.is_tx_noheadroom
+ vap->iv_stats.is_crypto_enmicfail;
stats->tx_dropped = vap->iv_stats.is_tx_nobuf
+ vap->iv_stats.is_tx_nonode
+ vap->iv_stats.is_tx_unknownmgt
+ vap->iv_stats.is_tx_badcipher
+ vap->iv_stats.is_tx_nodefkey;
stats->rx_errors = vap->iv_stats.is_rx_tooshort
+ vap->iv_stats.is_rx_wepfail
+ vap->iv_stats.is_rx_decap
+ vap->iv_stats.is_rx_nobuf
+ vap->iv_stats.is_rx_decryptcrc
+ vap->iv_stats.is_rx_ccmpmic
+ vap->iv_stats.is_rx_tkipmic
+ vap->iv_stats.is_rx_tkipicv;
stats->rx_crc_errors = 0;
return stats;
}
static int
ieee80211_change_mtu(struct net_device *dev, int mtu)
{
if ((IEEE80211_MTU_MIN >= mtu) || (mtu > IEEE80211_MTU_MAX))
return -EINVAL;
dev->mtu = mtu;
/* XXX: Coordinate with parent device */
return 0;
}
static void
ieee80211_set_multicast_list(struct net_device *dev)
{
struct ieee80211vap *vap = dev->priv;
struct ieee80211com *ic = vap->iv_ic;
struct net_device *parent = ic->ic_dev;
IEEE80211_LOCK_IRQ(ic);
if (dev->flags & IFF_PROMISC) {
if ((vap->iv_flags & IEEE80211_F_PROMISC) == 0) {
vap->iv_flags |= IEEE80211_F_PROMISC;
ic->ic_promisc++;
parent->flags |= IFF_PROMISC;
}
} else {
if (vap->iv_flags & IEEE80211_F_PROMISC) {
vap->iv_flags &= ~IEEE80211_F_PROMISC;
ic->ic_promisc--;
parent->flags &= ~IFF_PROMISC;
}
}
if (dev->flags & IFF_ALLMULTI) {
if ((vap->iv_flags & IEEE80211_F_ALLMULTI) == 0) {
vap->iv_flags |= IEEE80211_F_ALLMULTI;
ic->ic_allmulti++;
parent->flags |= IFF_ALLMULTI;
}
} else {
if (vap->iv_flags & IEEE80211_F_ALLMULTI) {
vap->iv_flags &= ~IEEE80211_F_ALLMULTI;
ic->ic_allmulti--;
parent->flags &= ~IFF_ALLMULTI;
}
}
IEEE80211_UNLOCK_IRQ(ic);
/* XXX: Merge multicast list into parent device */
parent->set_multicast_list(ic->ic_dev);
}
void
ieee80211_build_countryie(struct ieee80211com *ic)
{
int i, found;
struct net_device *dev = ic->ic_dev;
struct ieee80211_channel *c;
u_int8_t *cur_runlen, *cur_chan, *cur_pow, prevchan;
/* Fill in country IE. */
memset(&ic->ic_country_ie, 0, sizeof(ic->ic_country_ie));
ic->ic_country_ie.country_id = IEEE80211_ELEMID_COUNTRY;
/* Initialize country IE */
found = 0;
for (i = 0; i < ARRAY_SIZE(country_strings); i++) {
if (country_strings[i].iso_code == ic->ic_country_code) {
ic->ic_country_ie.country_str[0] = country_strings[i].iso_name[0];
ic->ic_country_ie.country_str[1] = country_strings[i].iso_name[1];
found = 1;
break;
}
}
if (!found) {
if_printf(dev, "bad country string ignored: %d\n",
ic->ic_country_code);
ic->ic_country_ie.country_str[0] = ' ';
ic->ic_country_ie.country_str[1] = ' ';
}
/*
* Indoor/Outdoor portion if country string.
* NB: this is not quite right, since we should have one of:
* 'I': indoor only
* 'O': outdoor only
* ' ': all enviroments
* we currently can only provide 'I' or ' '.
*/
ic->ic_country_ie.country_str[2] = 'I';
if (ic->ic_country_outdoor)
ic->ic_country_ie.country_str[2] = ' ';
/* Runlength encoded channel max. TX power info. */
cur_runlen = &ic->ic_country_ie.country_triplet[1];
cur_chan = &ic->ic_country_ie.country_triplet[0];
cur_pow = &ic->ic_country_ie.country_triplet[2];
prevchan = 0;
ic->ic_country_ie.country_len = 3; /* invalid, but just initialize */
if ((ic->ic_flags_ext & IEEE80211_FEXT_REGCLASS) && ic->ic_nregclass) {
/* Add regulatory triplets.
* chan/no_of_chans/tx power triplet is overridden as
* as follows:
* cur_chan == REGULATORY EXTENSION ID.
* cur_runlen = Regulatory class.
* cur_pow = coverage class.
*/
for (i = 0; i < ic->ic_nregclass; i++) {
*cur_chan = IEEE80211_REG_EXT_ID;
*cur_runlen = ic->ic_regclassids[i];
*cur_pow = ic->ic_coverageclass;
cur_runlen += 3;
cur_chan += 3;
cur_pow += 3;
ic->ic_country_ie.country_len += 3;
}
} else {
u_int16_t curmode_noturbo = ic->ic_curmode;
/* advertise only non-turbo channels */
/* XXX: shouldn't turbo channels be included as well? */
switch (curmode_noturbo) {
case IEEE80211_MODE_TURBO_A:
curmode_noturbo = IEEE80211_MODE_11A;
break;
case IEEE80211_MODE_TURBO_G:
curmode_noturbo = IEEE80211_MODE_11G;
break;
}
for (i = 0; i < ic->ic_nchans; i++) {
c = &ic->ic_channels[i];
/* Does channel belong to current operation mode */
if (ieee80211_chan2mode(c) != curmode_noturbo)
continue;
/* Skip half/quarter rate channels */
if (IEEE80211_IS_CHAN_HALF(c) ||
IEEE80211_IS_CHAN_QUARTER(c))
continue;
if (*cur_runlen == 0) {
(*cur_runlen)++;
*cur_pow = c->ic_maxregpower;
*cur_chan = c->ic_ieee;
prevchan = c->ic_ieee;
ic->ic_country_ie.country_len += 3;
} else if (*cur_pow == c->ic_maxregpower &&
c->ic_ieee == prevchan +
(IEEE80211_IS_CHAN_5GHZ(c) ? 4 : 1)) {
(*cur_runlen)++;
prevchan = c->ic_ieee;
} else {
cur_runlen +=3;
cur_chan += 3;
cur_pow += 3;
(*cur_runlen)++;
*cur_pow = c->ic_maxregpower;
*cur_chan = c->ic_ieee;
prevchan = c->ic_ieee;
ic->ic_country_ie.country_len += 3;
}
}
}
/* Pad */
if (ic->ic_country_ie.country_len & 1)
ic->ic_country_ie.country_len++;
}
void
ieee80211_build_sc_ie(struct ieee80211com *ic)
{
struct ieee80211_ie_sc *ie = &ic->ic_sc_ie;
int i, j;
struct ieee80211_channel *c;
u_int8_t prevchan;
/* Fill in Supported Channels IE. */
memset(ie, 0, sizeof(*ie));
ie->sc_id = IEEE80211_ELEMID_SUPPCHAN;
prevchan = 0;
j = 0;
for (i = 0; i < ic->ic_nchans; i++) {
c = &ic->ic_channels[i];
/* Skip disabled channels */
if (isclr(ic->ic_chan_active, c->ic_ieee))
continue;
/* XXX Skip turbo channels */
if (IEEE80211_IS_CHAN_TURBO(c))
continue;
/* Skip half/quarter rate channels */
if (IEEE80211_IS_CHAN_HALF(c) ||
IEEE80211_IS_CHAN_QUARTER(c))
continue;
/* Skip duplicate frequencies (separate b/g channels) */
if (c->ic_ieee == prevchan)
continue;
if (ie->sc_subband[j].sc_number == 0) {
ie->sc_subband[j].sc_first = c->ic_ieee;
} else if (c->ic_ieee != prevchan +
/* XXX: see 802.11d-2001-4-05-03-interp,
* but what about .11j, turbo, etc.? */
(IEEE80211_IS_CHAN_5GHZ(c) ? 4 : 1)) {
j++;
ie->sc_subband[j].sc_first = c->ic_ieee;
}
ie->sc_subband[j].sc_number++;
prevchan = c->ic_ieee;
}
ie->sc_len = (j+1) * 2;
}
int ath_debug_global = 0;
EXPORT_SYMBOL(ath_debug_global);
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