1 /*
2 * Copyright (C) 2009 Joshua Oreman <oremanj@rwcr.net>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 FILE_LICENCE ( GPL2_OR_LATER );
20
21 #include <stdio.h>
22 #include <console.h>
23 #include <string.h>
24 #include <errno.h>
25 #include <gpxe/net80211.h>
26 #include <gpxe/ethernet.h>
27 #include <usr/ifmgmt.h>
28 #include <usr/iwmgmt.h>
29 #include <gpxe/errortab.h>
30
31 /** @file
32 *
33 * Wireless network interface management
34 *
35 */
36
37 /**
38 * Print status of 802.11 device
39 *
40 * @v dev 802.11 device
41 */
iwstat(struct net80211_device * dev)42 void iwstat ( struct net80211_device *dev ) {
43
44 ifstat ( dev->netdev );
45
46 printf ( " [802.11 ");
47 if ( dev->state & NET80211_ASSOCIATED ) {
48 printf ( "SSID '%s', ", dev->essid );
49 } else {
50 printf ( "not associated, " );
51 }
52 if ( dev->channel < dev->nr_channels && dev->rate < dev->nr_rates ) {
53 printf ( "Ch:%d Sig:%d", dev->channels[dev->channel].channel_nr,
54 dev->last_signal );
55 switch ( dev->hw->signal_type ) {
56 case NET80211_SIGNAL_NONE:
57 printf ( "?" );
58 break;
59 case NET80211_SIGNAL_ARBITRARY:
60 printf ( "/%d", dev->hw->signal_max );
61 break;
62 case NET80211_SIGNAL_DB:
63 printf ( "/%d dB", dev->hw->signal_max );
64 break;
65 case NET80211_SIGNAL_DBM:
66 printf ( " dBm" );
67 break;
68 }
69 printf ( ", Qual:%d%% Rate:%d Mbps]\n",
70 ( dev->rx_beacon_interval == 0 ? 0 :
71 100 * dev->tx_beacon_interval /
72 dev->rx_beacon_interval ),
73 dev->rates[dev->rate] / 10 );
74 } else {
75 printf ( "antenna off]\n" );
76 }
77
78 if ( dev->state & NET80211_WORKING ) {
79 printf ( " [associating" );
80 if ( dev->associating )
81 printf ( " to '%s'", dev->associating->essid );
82 printf ( "...]\n" );
83 }
84 }
85
86 /** Identifiers for 802.11 cryptography types, indexed by type number */
87 static const char *crypto_types[] = {
88 [NET80211_CRYPT_NONE] = "Open",
89 [NET80211_CRYPT_WEP] = "WEP ",
90 [NET80211_CRYPT_TKIP] = "WPA ",
91 [NET80211_CRYPT_CCMP] = "WPA2",
92 [NET80211_CRYPT_UNKNOWN] = "UNK ",
93 };
94
95 /** Number of 802.11 cryptography types defined */
96 #define NR_CRYPTO_TYPES ( sizeof ( crypto_types ) / sizeof ( crypto_types[0] ) )
97
98 /** Identifiers for 802.11 authentication types, indexed by type number */
99 static const char *auth_types[] = {
100 [NET80211_SECPROT_NONE] = "",
101 [NET80211_SECPROT_PSK] = "PSK",
102 [NET80211_SECPROT_EAP] = "802.1X",
103 [NET80211_SECPROT_UNKNOWN] = "UNK",
104 };
105
106 /** Number of 802.11 authentication types defined */
107 #define NR_AUTH_TYPES ( sizeof ( auth_types ) / sizeof ( auth_types[0] ) )
108
109 /**
110 * Scan for wireless networks using 802.11 device
111 *
112 * @v dev 802.11 device
113 * @v active Whether to use active scanning
114 *
115 * The list of networks found will be printed in tabular format.
116 *
117 * This function is safe to call at all times, whether the 802.11
118 * device is open or not, but if called while the auto-association
119 * task is running it will return an error indication.
120 */
iwlist(struct net80211_device * dev)121 int iwlist ( struct net80211_device *dev ) {
122 struct net80211_probe_ctx *ctx;
123 struct list_head *networks;
124 struct net80211_wlan *wlan;
125 char ssid_buf[22];
126 int rc;
127 unsigned i;
128 int was_opened = dev->netdev->state & NETDEV_OPEN;
129 int was_channel = dev->channels[dev->channel].channel_nr;
130
131 if ( ! was_opened ) {
132 dev->state |= NET80211_NO_ASSOC;
133 rc = netdev_open ( dev->netdev );
134 if ( rc < 0 )
135 goto err;
136 }
137
138 if ( dev->state & NET80211_WORKING ) {
139 rc = -EINVAL;
140 goto err_close_netdev;
141 }
142
143 if ( ! was_opened ) {
144 rc = net80211_prepare_probe ( dev, dev->hw->bands, 0 );
145 if ( rc < 0 )
146 goto err_close_netdev;
147 }
148
149 ctx = net80211_probe_start ( dev, "", 0 );
150 if ( ! ctx ) {
151 rc = -ENOMEM;
152 goto err_close_netdev;
153 }
154
155 while ( ! ( rc = net80211_probe_step ( ctx ) ) ) {
156 step();
157 }
158
159 networks = net80211_probe_finish_all ( ctx );
160
161 if ( list_empty ( networks ) ) {
162 goto err_free_networks;
163 }
164
165 rc = 0;
166
167 printf ( "Networks on %s:\n\n", dev->netdev->name );
168
169 /* Output format:
170 * 0 1 2 3 4 5 6
171 * 0123456789012345678901234567890123456789012345678901234567890
172 * [Sig] SSID BSSID Ch Crypt/Auth
173 * -------------------------------------------------------------
174 * [ 15] abcdefghijklmnopqrst> 00:00:00:00:00:00 11 Open
175 * ... or WPA PSK etc.
176 */
177
178 /* Quoting the dashes and spaces verbatim uses less code space
179 than generating them programmatically. */
180 printf ( "[Sig] SSID BSSID Ch Crypt/Auth\n"
181 "-------------------------------------------------------------\n" );
182
183 list_for_each_entry ( wlan, networks, list ) {
184
185 /* Format SSID into 22-character string, space-padded,
186 with '>' indicating truncation */
187
188 snprintf ( ssid_buf, sizeof ( ssid_buf ), "%s", wlan->essid );
189 for ( i = strlen ( ssid_buf ); i < sizeof ( ssid_buf ) - 1;
190 i++ )
191 ssid_buf[i] = ' ';
192 if ( ssid_buf[sizeof ( ssid_buf ) - 2] != ' ' )
193 ssid_buf[sizeof ( ssid_buf ) - 2] = '>';
194 ssid_buf[sizeof ( ssid_buf ) - 1] = 0;
195
196 /* Sanity check */
197 if ( wlan->crypto >= NR_CRYPTO_TYPES ||
198 wlan->handshaking >= NR_AUTH_TYPES )
199 continue;
200
201 printf ( "[%3d] %s %s %2d %s %s\n",
202 wlan->signal < 0 ? 100 + wlan->signal : wlan->signal,
203 ssid_buf, eth_ntoa ( wlan->bssid ), wlan->channel,
204 crypto_types[wlan->crypto],
205 auth_types[wlan->handshaking] );
206 }
207 printf ( "\n" );
208
209 err_free_networks:
210 net80211_free_wlanlist ( networks );
211
212 err_close_netdev:
213 if ( ! was_opened ) {
214 dev->state &= ~NET80211_NO_ASSOC;
215 netdev_close ( dev->netdev );
216 } else {
217 net80211_change_channel ( dev, was_channel );
218 }
219
220 if ( ! rc )
221 return 0;
222
223 err:
224 printf ( "Scanning for networks on %s: %s\n",
225 dev->netdev->name, strerror ( rc ) );
226 return rc;
227 }
228
229
230 /* Record error codes as though they come from the 802.11 stack */
231 #undef ERRFILE
232 #define ERRFILE ERRFILE_net80211
233
234 /** Common 802.11 errors */
235 struct errortab common_wireless_errors[] __errortab = {
236 { EINVAL | EUNIQ_06, "Packet decryption error" },
237 { ECONNRESET | EUNIQ_01, "Unspecified reason" },
238 { ECONNRESET | EUNIQ_04, "Disassociated due to inactivity" },
239 { ECONNRESET | EUNIQ_0F, "4-Way Handshake timeout" },
240 { ECONNRESET | EUNIQ_17, "IEEE 802.1X authentication failed" },
241 { ECONNREFUSED | EUNIQ_01, "Unspecified failure" },
242 { ECONNREFUSED | EUNIQ_0C, "Association denied" },
243 { ECONNREFUSED | EUNIQ_0D, "Authentication method not supported" },
244 };
245