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471 lines
14 KiB
471 lines
14 KiB
/******************************************************************************
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Copyright(c) 2004 Intel Corporation. All rights reserved.
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Portions of this file are based on the WEP enablement code provided by the
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Host AP project hostap-drivers v0.1.3
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Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
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<jkmaline@cc.hut.fi>
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Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
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This program is free software; you can redistribute it and/or modify it
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under the terms of version 2 of the GNU General Public License as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59
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Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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The full GNU General Public License is included in this distribution in the
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file called LICENSE.
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Contact Information:
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James P. Ketrenos <ipw2100-admin@linux.intel.com>
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Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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******************************************************************************/
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#include <linux/wireless.h>
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#include <linux/version.h>
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#include <linux/kmod.h>
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#include <linux/module.h>
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#include <net/ieee80211.h>
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static const char *ieee80211_modes[] = {
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"?", "a", "b", "ab", "g", "ag", "bg", "abg"
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};
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#define MAX_CUSTOM_LEN 64
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static inline char *ipw2100_translate_scan(struct ieee80211_device *ieee,
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char *start, char *stop,
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struct ieee80211_network *network)
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{
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char custom[MAX_CUSTOM_LEN];
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char *p;
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struct iw_event iwe;
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int i, j;
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u8 max_rate, rate;
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/* First entry *MUST* be the AP MAC address */
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iwe.cmd = SIOCGIWAP;
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iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
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memcpy(iwe.u.ap_addr.sa_data, network->bssid, ETH_ALEN);
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start = iwe_stream_add_event(start, stop, &iwe, IW_EV_ADDR_LEN);
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/* Remaining entries will be displayed in the order we provide them */
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/* Add the ESSID */
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iwe.cmd = SIOCGIWESSID;
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iwe.u.data.flags = 1;
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if (network->flags & NETWORK_EMPTY_ESSID) {
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iwe.u.data.length = sizeof("<hidden>");
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start = iwe_stream_add_point(start, stop, &iwe, "<hidden>");
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} else {
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iwe.u.data.length = min(network->ssid_len, (u8)32);
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start = iwe_stream_add_point(start, stop, &iwe, network->ssid);
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}
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/* Add the protocol name */
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iwe.cmd = SIOCGIWNAME;
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snprintf(iwe.u.name, IFNAMSIZ, "IEEE 802.11%s", ieee80211_modes[network->mode]);
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start = iwe_stream_add_event(start, stop, &iwe, IW_EV_CHAR_LEN);
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/* Add mode */
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iwe.cmd = SIOCGIWMODE;
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if (network->capability &
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(WLAN_CAPABILITY_BSS | WLAN_CAPABILITY_IBSS)) {
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if (network->capability & WLAN_CAPABILITY_BSS)
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iwe.u.mode = IW_MODE_MASTER;
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else
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iwe.u.mode = IW_MODE_ADHOC;
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start = iwe_stream_add_event(start, stop, &iwe,
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IW_EV_UINT_LEN);
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}
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/* Add frequency/channel */
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iwe.cmd = SIOCGIWFREQ;
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/* iwe.u.freq.m = ieee80211_frequency(network->channel, network->mode);
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iwe.u.freq.e = 3; */
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iwe.u.freq.m = network->channel;
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iwe.u.freq.e = 0;
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iwe.u.freq.i = 0;
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start = iwe_stream_add_event(start, stop, &iwe, IW_EV_FREQ_LEN);
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/* Add encryption capability */
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iwe.cmd = SIOCGIWENCODE;
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if (network->capability & WLAN_CAPABILITY_PRIVACY)
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iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
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else
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iwe.u.data.flags = IW_ENCODE_DISABLED;
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iwe.u.data.length = 0;
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start = iwe_stream_add_point(start, stop, &iwe, network->ssid);
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/* Add basic and extended rates */
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max_rate = 0;
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p = custom;
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p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), " Rates (Mb/s): ");
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for (i = 0, j = 0; i < network->rates_len; ) {
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if (j < network->rates_ex_len &&
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((network->rates_ex[j] & 0x7F) <
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(network->rates[i] & 0x7F)))
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rate = network->rates_ex[j++] & 0x7F;
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else
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rate = network->rates[i++] & 0x7F;
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if (rate > max_rate)
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max_rate = rate;
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p += snprintf(p, MAX_CUSTOM_LEN - (p - custom),
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"%d%s ", rate >> 1, (rate & 1) ? ".5" : "");
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}
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for (; j < network->rates_ex_len; j++) {
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rate = network->rates_ex[j] & 0x7F;
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p += snprintf(p, MAX_CUSTOM_LEN - (p - custom),
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"%d%s ", rate >> 1, (rate & 1) ? ".5" : "");
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if (rate > max_rate)
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max_rate = rate;
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}
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iwe.cmd = SIOCGIWRATE;
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iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
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iwe.u.bitrate.value = max_rate * 500000;
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start = iwe_stream_add_event(start, stop, &iwe,
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IW_EV_PARAM_LEN);
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iwe.cmd = IWEVCUSTOM;
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iwe.u.data.length = p - custom;
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if (iwe.u.data.length)
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start = iwe_stream_add_point(start, stop, &iwe, custom);
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/* Add quality statistics */
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/* TODO: Fix these values... */
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iwe.cmd = IWEVQUAL;
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iwe.u.qual.qual = network->stats.signal;
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iwe.u.qual.level = network->stats.rssi;
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iwe.u.qual.noise = network->stats.noise;
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iwe.u.qual.updated = network->stats.mask & IEEE80211_STATMASK_WEMASK;
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if (!(network->stats.mask & IEEE80211_STATMASK_RSSI))
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iwe.u.qual.updated |= IW_QUAL_LEVEL_INVALID;
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if (!(network->stats.mask & IEEE80211_STATMASK_NOISE))
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iwe.u.qual.updated |= IW_QUAL_NOISE_INVALID;
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if (!(network->stats.mask & IEEE80211_STATMASK_SIGNAL))
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iwe.u.qual.updated |= IW_QUAL_QUAL_INVALID;
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start = iwe_stream_add_event(start, stop, &iwe, IW_EV_QUAL_LEN);
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iwe.cmd = IWEVCUSTOM;
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p = custom;
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iwe.u.data.length = p - custom;
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if (iwe.u.data.length)
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start = iwe_stream_add_point(start, stop, &iwe, custom);
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if (ieee->wpa_enabled && network->wpa_ie_len){
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char buf[MAX_WPA_IE_LEN * 2 + 30];
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u8 *p = buf;
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p += sprintf(p, "wpa_ie=");
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for (i = 0; i < network->wpa_ie_len; i++) {
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p += sprintf(p, "%02x", network->wpa_ie[i]);
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}
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memset(&iwe, 0, sizeof(iwe));
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iwe.cmd = IWEVCUSTOM;
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iwe.u.data.length = strlen(buf);
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start = iwe_stream_add_point(start, stop, &iwe, buf);
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}
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if (ieee->wpa_enabled && network->rsn_ie_len){
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char buf[MAX_WPA_IE_LEN * 2 + 30];
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u8 *p = buf;
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p += sprintf(p, "rsn_ie=");
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for (i = 0; i < network->rsn_ie_len; i++) {
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p += sprintf(p, "%02x", network->rsn_ie[i]);
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}
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memset(&iwe, 0, sizeof(iwe));
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iwe.cmd = IWEVCUSTOM;
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iwe.u.data.length = strlen(buf);
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start = iwe_stream_add_point(start, stop, &iwe, buf);
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}
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/* Add EXTRA: Age to display seconds since last beacon/probe response
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* for given network. */
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iwe.cmd = IWEVCUSTOM;
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p = custom;
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p += snprintf(p, MAX_CUSTOM_LEN - (p - custom),
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" Last beacon: %lums ago", (jiffies - network->last_scanned) / (HZ / 100));
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iwe.u.data.length = p - custom;
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if (iwe.u.data.length)
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start = iwe_stream_add_point(start, stop, &iwe, custom);
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return start;
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}
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int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
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struct iw_request_info *info,
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union iwreq_data *wrqu, char *extra)
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{
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struct ieee80211_network *network;
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unsigned long flags;
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char *ev = extra;
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char *stop = ev + IW_SCAN_MAX_DATA;
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int i = 0;
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IEEE80211_DEBUG_WX("Getting scan\n");
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spin_lock_irqsave(&ieee->lock, flags);
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list_for_each_entry(network, &ieee->network_list, list) {
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i++;
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if (ieee->scan_age == 0 ||
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time_after(network->last_scanned + ieee->scan_age, jiffies))
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ev = ipw2100_translate_scan(ieee, ev, stop, network);
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else
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IEEE80211_DEBUG_SCAN(
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"Not showing network '%s ("
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MAC_FMT ")' due to age (%lums).\n",
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escape_essid(network->ssid,
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network->ssid_len),
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MAC_ARG(network->bssid),
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(jiffies - network->last_scanned) / (HZ / 100));
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}
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spin_unlock_irqrestore(&ieee->lock, flags);
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wrqu->data.length = ev - extra;
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wrqu->data.flags = 0;
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IEEE80211_DEBUG_WX("exit: %d networks returned.\n", i);
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return 0;
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}
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int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
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struct iw_request_info *info,
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union iwreq_data *wrqu, char *keybuf)
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{
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struct iw_point *erq = &(wrqu->encoding);
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struct net_device *dev = ieee->dev;
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struct ieee80211_security sec = {
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.flags = 0
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};
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int i, key, key_provided, len;
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struct ieee80211_crypt_data **crypt;
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IEEE80211_DEBUG_WX("SET_ENCODE\n");
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key = erq->flags & IW_ENCODE_INDEX;
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if (key) {
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if (key > WEP_KEYS)
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return -EINVAL;
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key--;
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key_provided = 1;
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} else {
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key_provided = 0;
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key = ieee->tx_keyidx;
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}
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IEEE80211_DEBUG_WX("Key: %d [%s]\n", key, key_provided ?
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"provided" : "default");
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crypt = &ieee->crypt[key];
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if (erq->flags & IW_ENCODE_DISABLED) {
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if (key_provided && *crypt) {
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IEEE80211_DEBUG_WX("Disabling encryption on key %d.\n",
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key);
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ieee80211_crypt_delayed_deinit(ieee, crypt);
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} else
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IEEE80211_DEBUG_WX("Disabling encryption.\n");
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/* Check all the keys to see if any are still configured,
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* and if no key index was provided, de-init them all */
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for (i = 0; i < WEP_KEYS; i++) {
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if (ieee->crypt[i] != NULL) {
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if (key_provided)
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break;
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ieee80211_crypt_delayed_deinit(
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ieee, &ieee->crypt[i]);
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}
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}
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if (i == WEP_KEYS) {
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sec.enabled = 0;
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sec.level = SEC_LEVEL_0;
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sec.flags |= SEC_ENABLED | SEC_LEVEL;
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}
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goto done;
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}
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sec.enabled = 1;
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sec.flags |= SEC_ENABLED;
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if (*crypt != NULL && (*crypt)->ops != NULL &&
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strcmp((*crypt)->ops->name, "WEP") != 0) {
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/* changing to use WEP; deinit previously used algorithm
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* on this key */
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ieee80211_crypt_delayed_deinit(ieee, crypt);
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}
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if (*crypt == NULL) {
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struct ieee80211_crypt_data *new_crypt;
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/* take WEP into use */
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new_crypt = kmalloc(sizeof(struct ieee80211_crypt_data),
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GFP_KERNEL);
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if (new_crypt == NULL)
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return -ENOMEM;
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memset(new_crypt, 0, sizeof(struct ieee80211_crypt_data));
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new_crypt->ops = ieee80211_get_crypto_ops("WEP");
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if (!new_crypt->ops) {
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request_module("ieee80211_crypt_wep");
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new_crypt->ops = ieee80211_get_crypto_ops("WEP");
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}
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if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
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new_crypt->priv = new_crypt->ops->init(key);
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if (!new_crypt->ops || !new_crypt->priv) {
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kfree(new_crypt);
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new_crypt = NULL;
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printk(KERN_WARNING "%s: could not initialize WEP: "
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"load module ieee80211_crypt_wep\n",
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dev->name);
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return -EOPNOTSUPP;
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}
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*crypt = new_crypt;
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}
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/* If a new key was provided, set it up */
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if (erq->length > 0) {
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len = erq->length <= 5 ? 5 : 13;
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memcpy(sec.keys[key], keybuf, erq->length);
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if (len > erq->length)
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memset(sec.keys[key] + erq->length, 0,
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len - erq->length);
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IEEE80211_DEBUG_WX("Setting key %d to '%s' (%d:%d bytes)\n",
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key, escape_essid(sec.keys[key], len),
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erq->length, len);
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sec.key_sizes[key] = len;
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(*crypt)->ops->set_key(sec.keys[key], len, NULL,
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(*crypt)->priv);
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sec.flags |= (1 << key);
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/* This ensures a key will be activated if no key is
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* explicitely set */
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if (key == sec.active_key)
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sec.flags |= SEC_ACTIVE_KEY;
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} else {
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len = (*crypt)->ops->get_key(sec.keys[key], WEP_KEY_LEN,
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NULL, (*crypt)->priv);
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if (len == 0) {
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/* Set a default key of all 0 */
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IEEE80211_DEBUG_WX("Setting key %d to all zero.\n",
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key);
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memset(sec.keys[key], 0, 13);
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(*crypt)->ops->set_key(sec.keys[key], 13, NULL,
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(*crypt)->priv);
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sec.key_sizes[key] = 13;
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sec.flags |= (1 << key);
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}
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/* No key data - just set the default TX key index */
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if (key_provided) {
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IEEE80211_DEBUG_WX(
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"Setting key %d to default Tx key.\n", key);
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ieee->tx_keyidx = key;
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sec.active_key = key;
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sec.flags |= SEC_ACTIVE_KEY;
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}
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}
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done:
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ieee->open_wep = !(erq->flags & IW_ENCODE_RESTRICTED);
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sec.auth_mode = ieee->open_wep ? WLAN_AUTH_OPEN : WLAN_AUTH_SHARED_KEY;
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sec.flags |= SEC_AUTH_MODE;
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IEEE80211_DEBUG_WX("Auth: %s\n", sec.auth_mode == WLAN_AUTH_OPEN ?
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"OPEN" : "SHARED KEY");
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/* For now we just support WEP, so only set that security level...
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* TODO: When WPA is added this is one place that needs to change */
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sec.flags |= SEC_LEVEL;
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sec.level = SEC_LEVEL_1; /* 40 and 104 bit WEP */
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if (ieee->set_security)
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ieee->set_security(dev, &sec);
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/* Do not reset port if card is in Managed mode since resetting will
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* generate new IEEE 802.11 authentication which may end up in looping
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* with IEEE 802.1X. If your hardware requires a reset after WEP
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* configuration (for example... Prism2), implement the reset_port in
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* the callbacks structures used to initialize the 802.11 stack. */
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if (ieee->reset_on_keychange &&
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ieee->iw_mode != IW_MODE_INFRA &&
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ieee->reset_port && ieee->reset_port(dev)) {
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printk(KERN_DEBUG "%s: reset_port failed\n", dev->name);
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return -EINVAL;
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}
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return 0;
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}
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int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
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struct iw_request_info *info,
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union iwreq_data *wrqu, char *keybuf)
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{
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struct iw_point *erq = &(wrqu->encoding);
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int len, key;
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struct ieee80211_crypt_data *crypt;
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IEEE80211_DEBUG_WX("GET_ENCODE\n");
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key = erq->flags & IW_ENCODE_INDEX;
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if (key) {
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if (key > WEP_KEYS)
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return -EINVAL;
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key--;
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} else
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key = ieee->tx_keyidx;
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crypt = ieee->crypt[key];
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erq->flags = key + 1;
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if (crypt == NULL || crypt->ops == NULL) {
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erq->length = 0;
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erq->flags |= IW_ENCODE_DISABLED;
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return 0;
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}
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if (strcmp(crypt->ops->name, "WEP") != 0) {
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/* only WEP is supported with wireless extensions, so just
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* report that encryption is used */
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erq->length = 0;
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erq->flags |= IW_ENCODE_ENABLED;
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return 0;
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}
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len = crypt->ops->get_key(keybuf, WEP_KEY_LEN, NULL, crypt->priv);
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erq->length = (len >= 0 ? len : 0);
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erq->flags |= IW_ENCODE_ENABLED;
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if (ieee->open_wep)
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erq->flags |= IW_ENCODE_OPEN;
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else
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erq->flags |= IW_ENCODE_RESTRICTED;
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return 0;
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}
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EXPORT_SYMBOL(ieee80211_wx_get_scan);
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EXPORT_SYMBOL(ieee80211_wx_set_encode);
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EXPORT_SYMBOL(ieee80211_wx_get_encode);
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