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-rw-r--r--gpxe/src/usr/iwmgmt.c244
1 files changed, 244 insertions, 0 deletions
diff --git a/gpxe/src/usr/iwmgmt.c b/gpxe/src/usr/iwmgmt.c
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+++ b/gpxe/src/usr/iwmgmt.c
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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" },
+};