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freebsd/sys/net80211/ieee80211_regdomain.c
Sam Leffler 68e8e04e93 Update 802.11 wireless support: 
o major overhaul of the way channels are handled: channels are now
  fully enumerated and uniquely identify the operating characteristics;
  these changes are visible to user applications which require changes
o make scanning support independent of the state machine to enable
  background scanning and roaming
o move scanning support into loadable modules based on the operating
  mode to enable different policies and reduce the memory footprint
  on systems w/ constrained resources
o add background scanning in station mode (no support for adhoc/ibss
  mode yet)
o significantly speedup sta mode scanning with a variety of techniques
o add roaming support when background scanning is supported; for now
  we use a simple algorithm to trigger a roam: we threshold the rssi
  and tx rate, if either drops too low we try to roam to a new ap
o add tx fragmentation support
o add first cut at 802.11n support: this code works with forthcoming
  drivers but is incomplete; it's included now to establish a baseline
  for other drivers to be developed and for user applications
o adjust max_linkhdr et. al. to reflect 802.11 requirements; this eliminates
  prepending mbufs for traffic generated locally
o add support for Atheros protocol extensions; mainly the fast frames
  encapsulation (note this can be used with any card that can tx+rx
  large frames correctly)
o add sta support for ap's that beacon both WPA1+2 support
o change all data types from bsd-style to posix-style
o propagate noise floor data from drivers to net80211 and on to user apps
o correct various issues in the sta mode state machine related to handling
  authentication and association failures
o enable the addition of sta mode power save support for drivers that need
  net80211 support (not in this commit)
o remove old WI compatibility ioctls (wicontrol is officially dead)
o change the data structures returned for get sta info and get scan
  results so future additions will not break user apps
o fixed tx rate is now maintained internally as an ieee rate and not an
  index into the rate set; this needs to be extended to deal with
  multi-mode operation
o add extended channel specifications to radiotap to enable 11n sniffing

Drivers:
o ath: add support for bg scanning, tx fragmentation, fast frames,
       dynamic turbo (lightly tested), 11n (sniffing only and needs
       new hal)
o awi: compile tested only
o ndis: lightly tested
o ipw: lightly tested
o iwi: add support for bg scanning (well tested but may have some
       rough edges)
o ral, ural, rum: add suppoort for bg scanning, calibrate rssi data
o wi: lightly tested

This work is based on contributions by Atheros, kmacy, sephe, thompsa,
mlaier, kevlo, and others.  Much of the scanning work was supported by
Atheros.  The 11n work was supported by Marvell.
2007-06-11 03:36:55 +00:00

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/*-
* Copyright (c) 2005-2007 Sam Leffler, Errno Consulting
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* IEEE 802.11 regdomain support.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/ethernet.h>
#include <net80211/ieee80211_var.h>
#include <net80211/ieee80211_regdomain.h>
void
ieee80211_regdomain_attach(struct ieee80211com *ic)
{
ic->ic_regdomain = 0; /* XXX */
ic->ic_countrycode = CTRY_UNITED_STATES;/* XXX */
ic->ic_location = 1+2; /* both */
}
void
ieee80211_regdomain_detach(struct ieee80211com *ic)
{
}
static void
addchan(struct ieee80211com *ic, int ieee, int flags)
{
struct ieee80211_channel *c;
c = &ic->ic_channels[ic->ic_nchans++];
c->ic_freq = ieee80211_ieee2mhz(ieee, flags);
c->ic_ieee = ieee;
c->ic_flags = flags;
}
/*
* Setup the channel list for the specified regulatory domain,
* country code, and operating modes. This interface is used
* when a driver does not obtain the channel list from another
* source (such as firmware).
*/
void
ieee80211_init_channels(struct ieee80211com *ic,
int rd, enum ISOCountryCode cc, int bands, int outdoor, int ecm)
{
int i;
/* XXX just do something for now */
ic->ic_nchans = 0;
if (isset(&bands, IEEE80211_MODE_11B) ||
isset(&bands, IEEE80211_MODE_11G)) {
for (i = 1; i <= (ecm ? 14 : 11); i++) {
if (isset(&bands, IEEE80211_MODE_11B))
addchan(ic, i, IEEE80211_CHAN_B);
if (isset(&bands, IEEE80211_MODE_11G))
addchan(ic, i, IEEE80211_CHAN_G);
}
}
if (isset(&bands, IEEE80211_MODE_11A)) {
for (i = 36; i <= 64; i += 4)
addchan(ic, i, IEEE80211_CHAN_A);
for (i = 100; i <= 140; i += 4)
addchan(ic, i, IEEE80211_CHAN_A);
for (i = 149; i <= 161; i += 4)
addchan(ic, i, IEEE80211_CHAN_A);
}
ic->ic_regdomain = rd;
ic->ic_countrycode = cc;
ic->ic_location = outdoor;
}
/*
* Add Country Information IE.
*/
uint8_t *
ieee80211_add_countryie(uint8_t *frm, struct ieee80211com *ic,
enum ISOCountryCode cc, int location)
{
#define CHAN_UNINTERESTING \
(IEEE80211_CHAN_TURBO | IEEE80211_CHAN_STURBO | \
IEEE80211_CHAN_HALF | IEEE80211_CHAN_QUARTER)
/* XXX what about auto? */
/* flag set of channels to be excluded */
static const int skipflags[IEEE80211_MODE_MAX] = {
CHAN_UNINTERESTING, /* MODE_AUTO */
CHAN_UNINTERESTING | IEEE80211_CHAN_2GHZ, /* MODE_11A */
CHAN_UNINTERESTING | IEEE80211_CHAN_5GHZ, /* MODE_11B */
CHAN_UNINTERESTING | IEEE80211_CHAN_5GHZ, /* MODE_11G */
CHAN_UNINTERESTING | IEEE80211_CHAN_OFDM | /* MODE_FH */
IEEE80211_CHAN_CCK | IEEE80211_CHAN_DYN,
CHAN_UNINTERESTING | IEEE80211_CHAN_2GHZ, /* MODE_TURBO_A */
CHAN_UNINTERESTING | IEEE80211_CHAN_5GHZ, /* MODE_TURBO_G */
CHAN_UNINTERESTING | IEEE80211_CHAN_2GHZ, /* MODE_STURBO_A */
CHAN_UNINTERESTING | IEEE80211_CHAN_2GHZ, /* MODE_11NA */
CHAN_UNINTERESTING | IEEE80211_CHAN_5GHZ, /* MODE_11NG */
};
struct ieee80211_country_ie *ie = (struct ieee80211_country_ie *)frm;
const char *iso_name;
uint8_t nextchan, chans[IEEE80211_CHAN_BYTES];
int i, skip;
ie->ie = IEEE80211_ELEMID_COUNTRY;
iso_name = ieee80211_cctoiso(cc);
if (iso_name == NULL) {
if_printf(ic->ic_ifp, "bad country code %d ignored\n", cc);
iso_name = " ";
}
ie->cc[0] = iso_name[0];
ie->cc[1] = iso_name[1];
/*
* Indoor/Outdoor portion of country string.
* NB: this is not quite right, since we should have one of:
* 'I' indoor only
* 'O' outdoor only
* ' ' all enviroments
*/
ie->cc[2] = ((location & 3) == 3 ? ' ' : location & 1 ? 'I' : 'O');
/*
* Run-length encoded channel+max tx power info.
*/
frm = (uint8_t *)&ie->band[0];
nextchan = 0; /* NB: impossible channel # */
memset(chans, 0, sizeof(chans));
skip = skipflags[ic->ic_curmode];
for (i = 0; i < ic->ic_nchans; i++) {
const struct ieee80211_channel *c = &ic->ic_channels[i];
if (isset(chans, c->ic_ieee)) /* suppress dup's */
continue;
if ((c->ic_flags & skip) == 0) /* skip band, etc. */
continue;
setbit(chans, c->ic_ieee);
if (c->ic_ieee != nextchan ||
c->ic_maxregpower != frm[-1]) { /* new run */
/* XXX max of 83 runs */
frm[0] = c->ic_ieee; /* starting channel # */
frm[1] = 1; /* # channels in run */
frm[2] = c->ic_maxregpower; /* tx power cap */
frm += 3;
nextchan = c->ic_ieee + 1; /* overflow? */
} else { /* extend run */
frm[-2]++;
nextchan++;
}
}
ie->len = frm - ie->cc;
if (ie->len & 1) /* pad to multiple of 2 */
ie->len++;
return frm;
#undef CHAN_UNINTERESTING
}
/*
* Country Code Table for code-to-string conversion.
*/
static const struct {
enum ISOCountryCode iso_code;
const char* iso_name;
} country_strings[] = {
{ CTRY_DEBUG, "DB" }, /* NB: nonstandard */
{ CTRY_DEFAULT, "NA" }, /* NB: nonstandard */
{ 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_JAMAICA, "JM" },
{ CTRY_JAPAN, "JP" },
{ CTRY_JAPAN1, "J1" },
{ CTRY_JAPAN2, "J2" },
{ CTRY_JAPAN3, "J3" },
{ CTRY_JAPAN4, "J4" },
{ CTRY_JAPAN5, "J5" },
{ 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_URUGUAY, "UY" },
{ CTRY_UZBEKISTAN, "UZ" },
{ CTRY_VENEZUELA, "VE" },
{ CTRY_VIET_NAM, "VN" },
{ CTRY_YEMEN, "YE" },
{ CTRY_ZIMBABWE, "ZW" }
};
const char *
ieee80211_cctoiso(enum ISOCountryCode cc)
{
#define N(a) (sizeof(a) / sizeof(a[0]))
int i;
for (i = 0; i < N(country_strings); i++) {
if (country_strings[i].iso_code == cc)
return country_strings[i].iso_name;
}
return NULL;
#undef N
}
int
ieee80211_isotocc(const char iso[2])
{
#define N(a) (sizeof(a) / sizeof(a[0]))
int i;
for (i = 0; i < N(country_strings); i++) {
if (country_strings[i].iso_name[0] == iso[0] &&
country_strings[i].iso_name[1] == iso[1])
return country_strings[i].iso_code;
}
return -1;
#undef N
}
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