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/*
* Copyright (C) 2009 Joshua Oreman <oremanj@rwcr.net>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdio.h>
#include <console.h>
#include <string.h>
#include <errno.h>
#include <gpxe/net80211.h>
#include <gpxe/ethernet.h>
#include <usr/ifmgmt.h>
#include <usr/iwmgmt.h>
#include <gpxe/errortab.h>
/** @file
*
* Wireless network interface management
*
*/
/**
* Print status of 802.11 device
*
* @v dev 802.11 device
*/
void iwstat ( struct net80211_device *dev ) {
ifstat ( dev->netdev );
printf ( " [802.11 ");
if ( dev->state & NET80211_ASSOCIATED ) {
printf ( "SSID '%s', ", dev->essid );
} else {
printf ( "not associated, " );
}
if ( dev->channel < dev->nr_channels && dev->rate < dev->nr_rates ) {
printf ( "Ch:%d Sig:%d", dev->channels[dev->channel].channel_nr,
dev->last_signal );
switch ( dev->hw->signal_type ) {
case NET80211_SIGNAL_NONE:
printf ( "?" );
break;
case NET80211_SIGNAL_ARBITRARY:
printf ( "/%d", dev->hw->signal_max );
break;
case NET80211_SIGNAL_DB:
printf ( "/%d dB", dev->hw->signal_max );
break;
case NET80211_SIGNAL_DBM:
printf ( " dBm" );
break;
}
printf ( ", Qual:%d%% Rate:%d Mbps]\n",
( dev->rx_beacon_interval == 0 ? 0 :
100 * dev->tx_beacon_interval /
dev->rx_beacon_interval ),
dev->rates[dev->rate] / 10 );
} else {
printf ( "antenna off]\n" );
}
if ( dev->state & NET80211_WORKING ) {
printf ( " [associating" );
if ( dev->associating )
printf ( " to '%s'", dev->associating->essid );
printf ( "...]\n" );
}
}
/** Identifiers for 802.11 cryptography types, indexed by type number */
static const char *crypto_types[] = {
[NET80211_CRYPT_NONE] = "Open",
[NET80211_CRYPT_WEP] = "WEP ",
[NET80211_CRYPT_TKIP] = "WPA ",
[NET80211_CRYPT_CCMP] = "WPA2",
[NET80211_CRYPT_UNKNOWN] = "UNK ",
};
/** Number of 802.11 cryptography types defined */
#define NR_CRYPTO_TYPES ( sizeof ( crypto_types ) / sizeof ( crypto_types[0] ) )
/** Identifiers for 802.11 authentication types, indexed by type number */
static const char *auth_types[] = {
[NET80211_SECPROT_NONE] = "",
[NET80211_SECPROT_PSK] = "PSK",
[NET80211_SECPROT_EAP] = "802.1X",
[NET80211_SECPROT_UNKNOWN] = "UNK",
};
/** Number of 802.11 authentication types defined */
#define NR_AUTH_TYPES ( sizeof ( auth_types ) / sizeof ( auth_types[0] ) )
/**
* Scan for wireless networks using 802.11 device
*
* @v dev 802.11 device
* @v active Whether to use active scanning
*
* The list of networks found will be printed in tabular format.
*
* This function is safe to call at all times, whether the 802.11
* device is open or not, but if called while the auto-association
* task is running it will return an error indication.
*/
int iwlist ( struct net80211_device *dev ) {
struct net80211_probe_ctx *ctx;
struct list_head *networks;
struct net80211_wlan *wlan;
char ssid_buf[22];
int rc;
unsigned i;
int was_opened = dev->netdev->state & NETDEV_OPEN;
int was_channel = dev->channels[dev->channel].channel_nr;
if ( ! was_opened ) {
dev->state |= NET80211_NO_ASSOC;
rc = netdev_open ( dev->netdev );
if ( rc < 0 )
goto err;
}
if ( dev->state & NET80211_WORKING ) {
rc = -EINVAL;
goto err_close_netdev;
}
if ( ! was_opened ) {
rc = net80211_prepare_probe ( dev, dev->hw->bands, 0 );
if ( rc < 0 )
goto err_close_netdev;
}
ctx = net80211_probe_start ( dev, "", 0 );
if ( ! ctx ) {
rc = -ENOMEM;
goto err_close_netdev;
}
while ( ! ( rc = net80211_probe_step ( ctx ) ) ) {
step();
}
networks = net80211_probe_finish_all ( ctx );
if ( list_empty ( networks ) ) {
goto err_free_networks;
}
rc = 0;
printf ( "Networks on %s:\n\n", dev->netdev->name );
/* Output format:
* 0 1 2 3 4 5 6
* 0123456789012345678901234567890123456789012345678901234567890
* [Sig] SSID BSSID Ch Crypt/Auth
* -------------------------------------------------------------
* [ 15] abcdefghijklmnopqrst> 00:00:00:00:00:00 11 Open
* ... or WPA PSK etc.
*/
/* Quoting the dashes and spaces verbatim uses less code space
than generating them programmatically. */
printf ( "[Sig] SSID BSSID Ch Crypt/Auth\n"
"-------------------------------------------------------------\n" );
list_for_each_entry ( wlan, networks, list ) {
/* Format SSID into 22-character string, space-padded,
with '>' indicating truncation */
snprintf ( ssid_buf, sizeof ( ssid_buf ), "%s", wlan->essid );
for ( i = strlen ( ssid_buf ); i < sizeof ( ssid_buf ) - 1;
i++ )
ssid_buf[i] = ' ';
if ( ssid_buf[sizeof ( ssid_buf ) - 2] != ' ' )
ssid_buf[sizeof ( ssid_buf ) - 2] = '>';
ssid_buf[sizeof ( ssid_buf ) - 1] = 0;
/* Sanity check */
if ( wlan->crypto >= NR_CRYPTO_TYPES ||
wlan->handshaking >= NR_AUTH_TYPES )
continue;
printf ( "[%3d] %s %s %2d %s %s\n",
wlan->signal < 0 ? 100 + wlan->signal : wlan->signal,
ssid_buf, eth_ntoa ( wlan->bssid ), wlan->channel,
crypto_types[wlan->crypto],
auth_types[wlan->handshaking] );
}
printf ( "\n" );
err_free_networks:
net80211_free_wlanlist ( networks );
err_close_netdev:
if ( ! was_opened ) {
dev->state &= ~NET80211_NO_ASSOC;
netdev_close ( dev->netdev );
} else {
net80211_change_channel ( dev, was_channel );
}
if ( ! rc )
return 0;
err:
printf ( "Scanning for networks on %s: %s\n",
dev->netdev->name, strerror ( rc ) );
return rc;
}
/* Record error codes as though they come from the 802.11 stack */
#undef ERRFILE
#define ERRFILE ERRFILE_net80211
/** Common 802.11 errors */
struct errortab common_wireless_errors[] __errortab = {
{ EINVAL | EUNIQ_06, "Packet decryption error" },
{ ECONNRESET | EUNIQ_01, "Unspecified reason" },
{ ECONNRESET | EUNIQ_04, "Disassociated due to inactivity" },
{ ECONNRESET | EUNIQ_0F, "4-Way Handshake timeout" },
{ ECONNRESET | EUNIQ_17, "IEEE 802.1X authentication failed" },
{ ECONNREFUSED | EUNIQ_01, "Unspecified failure" },
{ ECONNREFUSED | EUNIQ_0C, "Association denied" },
{ ECONNREFUSED | EUNIQ_0D, "Authentication method not supported" },
};
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