[NET] ieee80211 subsystem

Contributors:
Host AP contributors
James Ketrenos <jketreno@linux.intel.com>
Francois Romieu <romieu@fr.zoreil.com>
Adrian Bunk <bunk@stusta.de>
Matthew Galgoci <mgalgoci@parcelfarce.linux.th
eplanet.co.uk>

1 files changed, 471 insertions, 0 deletions

diff --git a/net/ieee80211/ieee80211_wx.c b/net/ieee80211/ieee80211_wx.c
new file mode 100644
index 000000000000..25a868c2e2f7
--- /dev/null
+++ b/net/ieee80211/ieee80211_wx.c
@@ -0,0 +1,471 @@
+/******************************************************************************
+
+  Copyright(c) 2004 Intel Corporation. All rights reserved.
+
+  Portions of this file are based on the WEP enablement code provided by the
+  Host AP project hostap-drivers v0.1.3
+  Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
+  <jkmaline@cc.hut.fi>
+  Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms of version 2 of the GNU General Public License as
+  published by the Free Software Foundation.
+
+  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., 59
+  Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+  The full GNU General Public License is included in this distribution in the
+  file called LICENSE.
+
+  Contact Information:
+  James P. Ketrenos <ipw2100-admin@linux.intel.com>
+  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+
+******************************************************************************/
+#include <linux/wireless.h>
+#include <linux/version.h>
+#include <linux/kmod.h>
+#include <linux/module.h>
+
+#include <net/ieee80211.h>
+static const char *ieee80211_modes[] = {
+        "?", "a", "b", "ab", "g", "ag", "bg", "abg"
+};
+
+#define MAX_CUSTOM_LEN 64
+static inline char *ipw2100_translate_scan(struct ieee80211_device *ieee,
+                                           char *start, char *stop,
+                                           struct ieee80211_network *network)
+{
+        char custom[MAX_CUSTOM_LEN];
+        char *p;
+        struct iw_event iwe;
+        int i, j;
+        u8 max_rate, rate;
+
+        /* First entry *MUST* be the AP MAC address */
+        iwe.cmd = SIOCGIWAP;
+        iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
+        memcpy(iwe.u.ap_addr.sa_data, network->bssid, ETH_ALEN);
+        start = iwe_stream_add_event(start, stop, &iwe, IW_EV_ADDR_LEN);
+
+        /* Remaining entries will be displayed in the order we provide them */
+
+        /* Add the ESSID */
+        iwe.cmd = SIOCGIWESSID;
+        iwe.u.data.flags = 1;
+        if (network->flags & NETWORK_EMPTY_ESSID) {
+                iwe.u.data.length = sizeof("<hidden>");
+                start = iwe_stream_add_point(start, stop, &iwe, "<hidden>");
+        } else {
+                iwe.u.data.length = min(network->ssid_len, (u8)32);
+                start = iwe_stream_add_point(start, stop, &iwe, network->ssid);
+        }
+
+        /* Add the protocol name */
+        iwe.cmd = SIOCGIWNAME;
+        snprintf(iwe.u.name, IFNAMSIZ, "IEEE 802.11%s", ieee80211_modes[network->mode]);
+        start = iwe_stream_add_event(start, stop, &iwe, IW_EV_CHAR_LEN);
+
+        /* Add mode */
+        iwe.cmd = SIOCGIWMODE;
+        if (network->capability &
+            (WLAN_CAPABILITY_BSS | WLAN_CAPABILITY_IBSS)) {
+                if (network->capability & WLAN_CAPABILITY_BSS)
+                        iwe.u.mode = IW_MODE_MASTER;
+                else
+                        iwe.u.mode = IW_MODE_ADHOC;
+
+                start = iwe_stream_add_event(start, stop, &iwe,
+                                             IW_EV_UINT_LEN);
+        }
+
+        /* Add frequency/channel */
+        iwe.cmd = SIOCGIWFREQ;
+/*      iwe.u.freq.m = ieee80211_frequency(network->channel, network->mode);
+        iwe.u.freq.e = 3; */
+        iwe.u.freq.m = network->channel;
+        iwe.u.freq.e = 0;
+        iwe.u.freq.i = 0;
+        start = iwe_stream_add_event(start, stop, &iwe, IW_EV_FREQ_LEN);
+
+        /* Add encryption capability */
+        iwe.cmd = SIOCGIWENCODE;
+        if (network->capability & WLAN_CAPABILITY_PRIVACY)
+                iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
+        else
+                iwe.u.data.flags = IW_ENCODE_DISABLED;
+        iwe.u.data.length = 0;
+        start = iwe_stream_add_point(start, stop, &iwe, network->ssid);
+
+        /* Add basic and extended rates */
+        max_rate = 0;
+        p = custom;
+        p += snprintf(p, MAX_CUSTOM_LEN - (p - custom), " Rates (Mb/s): ");
+        for (i = 0, j = 0; i < network->rates_len; ) {
+                if (j < network->rates_ex_len &&
+                    ((network->rates_ex[j] & 0x7F) <
+                     (network->rates[i] & 0x7F)))
+                        rate = network->rates_ex[j++] & 0x7F;
+                else
+                        rate = network->rates[i++] & 0x7F;
+                if (rate > max_rate)
+                        max_rate = rate;
+                p += snprintf(p, MAX_CUSTOM_LEN - (p - custom),
+                              "%d%s ", rate >> 1, (rate & 1) ? ".5" : "");
+        }
+        for (; j < network->rates_ex_len; j++) {
+                rate = network->rates_ex[j] & 0x7F;
+                p += snprintf(p, MAX_CUSTOM_LEN - (p - custom),
+                              "%d%s ", rate >> 1, (rate & 1) ? ".5" : "");
+                if (rate > max_rate)
+                        max_rate = rate;
+        }
+
+        iwe.cmd = SIOCGIWRATE;
+        iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
+        iwe.u.bitrate.value = max_rate * 500000;
+        start = iwe_stream_add_event(start, stop, &iwe,
+                                     IW_EV_PARAM_LEN);
+
+        iwe.cmd = IWEVCUSTOM;
+        iwe.u.data.length = p - custom;
+        if (iwe.u.data.length)
+                start = iwe_stream_add_point(start, stop, &iwe, custom);
+
+        /* Add quality statistics */
+        /* TODO: Fix these values... */
+        iwe.cmd = IWEVQUAL;
+        iwe.u.qual.qual = network->stats.signal;
+        iwe.u.qual.level = network->stats.rssi;
+        iwe.u.qual.noise = network->stats.noise;
+        iwe.u.qual.updated = network->stats.mask & IEEE80211_STATMASK_WEMASK;
+        if (!(network->stats.mask & IEEE80211_STATMASK_RSSI))
+                iwe.u.qual.updated |= IW_QUAL_LEVEL_INVALID;
+        if (!(network->stats.mask & IEEE80211_STATMASK_NOISE))
+                iwe.u.qual.updated |= IW_QUAL_NOISE_INVALID;
+        if (!(network->stats.mask & IEEE80211_STATMASK_SIGNAL))
+                iwe.u.qual.updated |= IW_QUAL_QUAL_INVALID;
+
+        start = iwe_stream_add_event(start, stop, &iwe, IW_EV_QUAL_LEN);
+
+        iwe.cmd = IWEVCUSTOM;
+        p = custom;
+
+        iwe.u.data.length = p - custom;
+        if (iwe.u.data.length)
+                start = iwe_stream_add_point(start, stop, &iwe, custom);
+
+        if (ieee->wpa_enabled && network->wpa_ie_len){
+                char buf[MAX_WPA_IE_LEN * 2 + 30];
+
+                u8 *p = buf;
+                p += sprintf(p, "wpa_ie=");
+                for (i = 0; i < network->wpa_ie_len; i++) {
+                        p += sprintf(p, "%02x", network->wpa_ie[i]);
+                }
+
+                memset(&iwe, 0, sizeof(iwe));
+                iwe.cmd = IWEVCUSTOM;
+                iwe.u.data.length = strlen(buf);
+                start = iwe_stream_add_point(start, stop, &iwe, buf);
+        }
+
+        if (ieee->wpa_enabled && network->rsn_ie_len){
+                char buf[MAX_WPA_IE_LEN * 2 + 30];
+
+                u8 *p = buf;
+                p += sprintf(p, "rsn_ie=");
+                for (i = 0; i < network->rsn_ie_len; i++) {
+                        p += sprintf(p, "%02x", network->rsn_ie[i]);
+                }
+
+                memset(&iwe, 0, sizeof(iwe));
+                iwe.cmd = IWEVCUSTOM;
+                iwe.u.data.length = strlen(buf);
+                start = iwe_stream_add_point(start, stop, &iwe, buf);
+        }
+
+        /* Add EXTRA: Age to display seconds since last beacon/probe response
+         * for given network. */
+        iwe.cmd = IWEVCUSTOM;
+        p = custom;
+        p += snprintf(p, MAX_CUSTOM_LEN - (p - custom),
+                      " Last beacon: %lums ago", (jiffies - network->last_scanned) / (HZ / 100));
+        iwe.u.data.length = p - custom;
+        if (iwe.u.data.length)
+                start = iwe_stream_add_point(start, stop, &iwe, custom);
+
+
+        return start;
+}
+
+int ieee80211_wx_get_scan(struct ieee80211_device *ieee,
+                          struct iw_request_info *info,
+                          union iwreq_data *wrqu, char *extra)
+{
+        struct ieee80211_network *network;
+        unsigned long flags;
+
+        char *ev = extra;
+        char *stop = ev + IW_SCAN_MAX_DATA;
+        int i = 0;
+
+        IEEE80211_DEBUG_WX("Getting scan\n");
+
+        spin_lock_irqsave(&ieee->lock, flags);
+
+        list_for_each_entry(network, &ieee->network_list, list) {
+                i++;
+                if (ieee->scan_age == 0 ||
+                    time_after(network->last_scanned + ieee->scan_age, jiffies))
+                        ev = ipw2100_translate_scan(ieee, ev, stop, network);
+                else
+                        IEEE80211_DEBUG_SCAN(
+                                "Not showing network '%s ("
+                                MAC_FMT ")' due to age (%lums).\n",
+                                escape_essid(network->ssid,
+                                             network->ssid_len),
+                                MAC_ARG(network->bssid),
+                                (jiffies - network->last_scanned) / (HZ / 100));
+        }
+
+        spin_unlock_irqrestore(&ieee->lock, flags);
+
+        wrqu->data.length = ev -  extra;
+        wrqu->data.flags = 0;
+
+        IEEE80211_DEBUG_WX("exit: %d networks returned.\n", i);
+
+        return 0;
+}
+
+int ieee80211_wx_set_encode(struct ieee80211_device *ieee,
+                            struct iw_request_info *info,
+                            union iwreq_data *wrqu, char *keybuf)
+{
+        struct iw_point *erq = &(wrqu->encoding);
+        struct net_device *dev = ieee->dev;
+        struct ieee80211_security sec = {
+                .flags = 0
+        };
+        int i, key, key_provided, len;
+        struct ieee80211_crypt_data **crypt;
+
+        IEEE80211_DEBUG_WX("SET_ENCODE\n");
+
+        key = erq->flags & IW_ENCODE_INDEX;
+        if (key) {
+                if (key > WEP_KEYS)
+                        return -EINVAL;
+                key--;
+                key_provided = 1;
+        } else {
+                key_provided = 0;
+                key = ieee->tx_keyidx;
+        }
+
+        IEEE80211_DEBUG_WX("Key: %d [%s]\n", key, key_provided ?
+                           "provided" : "default");
+
+        crypt = &ieee->crypt[key];
+
+        if (erq->flags & IW_ENCODE_DISABLED) {
+                if (key_provided && *crypt) {
+                        IEEE80211_DEBUG_WX("Disabling encryption on key %d.\n",
+                                           key);
+                        ieee80211_crypt_delayed_deinit(ieee, crypt);
+                } else
+                        IEEE80211_DEBUG_WX("Disabling encryption.\n");
+
+                /* Check all the keys to see if any are still configured,
+                 * and if no key index was provided, de-init them all */
+                for (i = 0; i < WEP_KEYS; i++) {
+                        if (ieee->crypt[i] != NULL) {
+                                if (key_provided)
+                                        break;
+                                ieee80211_crypt_delayed_deinit(
+                                        ieee, &ieee->crypt[i]);
+                        }
+                }
+
+                if (i == WEP_KEYS) {
+                        sec.enabled = 0;
+                        sec.level = SEC_LEVEL_0;
+                        sec.flags |= SEC_ENABLED | SEC_LEVEL;
+                }
+
+                goto done;
+        }
+
+
+
+        sec.enabled = 1;
+        sec.flags |= SEC_ENABLED;
+
+        if (*crypt != NULL && (*crypt)->ops != NULL &&
+            strcmp((*crypt)->ops->name, "WEP") != 0) {
+                /* changing to use WEP; deinit previously used algorithm
+                 * on this key */
+                ieee80211_crypt_delayed_deinit(ieee, crypt);
+        }
+
+        if (*crypt == NULL) {
+                struct ieee80211_crypt_data *new_crypt;
+
+                /* take WEP into use */
+                new_crypt = kmalloc(sizeof(struct ieee80211_crypt_data),
+                                    GFP_KERNEL);
+                if (new_crypt == NULL)
+                        return -ENOMEM;
+                memset(new_crypt, 0, sizeof(struct ieee80211_crypt_data));
+                new_crypt->ops = ieee80211_get_crypto_ops("WEP");
+                if (!new_crypt->ops) {
+                        request_module("ieee80211_crypt_wep");
+                        new_crypt->ops = ieee80211_get_crypto_ops("WEP");
+                }
+
+                if (new_crypt->ops && try_module_get(new_crypt->ops->owner))
+                        new_crypt->priv = new_crypt->ops->init(key);
+
+                if (!new_crypt->ops || !new_crypt->priv) {
+                        kfree(new_crypt);
+                        new_crypt = NULL;
+
+                        printk(KERN_WARNING "%s: could not initialize WEP: "
+                               "load module ieee80211_crypt_wep\n",
+                               dev->name);
+                        return -EOPNOTSUPP;
+                }
+                *crypt = new_crypt;
+        }
+
+        /* If a new key was provided, set it up */
+        if (erq->length > 0) {
+                len = erq->length <= 5 ? 5 : 13;
+                memcpy(sec.keys[key], keybuf, erq->length);
+                if (len > erq->length)
+                        memset(sec.keys[key] + erq->length, 0,
+                               len - erq->length);
+                IEEE80211_DEBUG_WX("Setting key %d to '%s' (%d:%d bytes)\n",
+                                   key, escape_essid(sec.keys[key], len),
+                                   erq->length, len);
+                sec.key_sizes[key] = len;
+                (*crypt)->ops->set_key(sec.keys[key], len, NULL,
+                                       (*crypt)->priv);
+                sec.flags |= (1 << key);
+                /* This ensures a key will be activated if no key is
+                 * explicitely set */
+                if (key == sec.active_key)
+                        sec.flags |= SEC_ACTIVE_KEY;
+        } else {
+                len = (*crypt)->ops->get_key(sec.keys[key], WEP_KEY_LEN,
+                                             NULL, (*crypt)->priv);
+                if (len == 0) {
+                        /* Set a default key of all 0 */
+                        IEEE80211_DEBUG_WX("Setting key %d to all zero.\n",
+                                           key);
+                        memset(sec.keys[key], 0, 13);
+                        (*crypt)->ops->set_key(sec.keys[key], 13, NULL,
+                                               (*crypt)->priv);
+                        sec.key_sizes[key] = 13;
+                        sec.flags |= (1 << key);
+                }
+
+                /* No key data - just set the default TX key index */
+                if (key_provided) {
+                        IEEE80211_DEBUG_WX(
+                                "Setting key %d to default Tx key.\n", key);
+                        ieee->tx_keyidx = key;
+                        sec.active_key = key;
+                        sec.flags |= SEC_ACTIVE_KEY;
+                }
+        }
+
+ done:
+        ieee->open_wep = !(erq->flags & IW_ENCODE_RESTRICTED);
+        sec.auth_mode = ieee->open_wep ? WLAN_AUTH_OPEN : WLAN_AUTH_SHARED_KEY;
+        sec.flags |= SEC_AUTH_MODE;
+        IEEE80211_DEBUG_WX("Auth: %s\n", sec.auth_mode == WLAN_AUTH_OPEN ?
+                           "OPEN" : "SHARED KEY");
+
+        /* For now we just support WEP, so only set that security level...
+         * TODO: When WPA is added this is one place that needs to change */
+        sec.flags |= SEC_LEVEL;
+        sec.level = SEC_LEVEL_1; /* 40 and 104 bit WEP */
+
+        if (ieee->set_security)
+                ieee->set_security(dev, &sec);
+
+        /* Do not reset port if card is in Managed mode since resetting will
+         * generate new IEEE 802.11 authentication which may end up in looping
+         * with IEEE 802.1X.  If your hardware requires a reset after WEP
+         * configuration (for example... Prism2), implement the reset_port in
+         * the callbacks structures used to initialize the 802.11 stack. */
+        if (ieee->reset_on_keychange &&
+            ieee->iw_mode != IW_MODE_INFRA &&
+            ieee->reset_port && ieee->reset_port(dev)) {
+                printk(KERN_DEBUG "%s: reset_port failed\n", dev->name);
+                return -EINVAL;
+        }
+        return 0;
+}
+
+int ieee80211_wx_get_encode(struct ieee80211_device *ieee,
+                            struct iw_request_info *info,
+                            union iwreq_data *wrqu, char *keybuf)
+{
+        struct iw_point *erq = &(wrqu->encoding);
+        int len, key;
+        struct ieee80211_crypt_data *crypt;
+
+        IEEE80211_DEBUG_WX("GET_ENCODE\n");
+
+        key = erq->flags & IW_ENCODE_INDEX;
+        if (key) {
+                if (key > WEP_KEYS)
+                        return -EINVAL;
+                key--;
+        } else
+                key = ieee->tx_keyidx;
+
+        crypt = ieee->crypt[key];
+        erq->flags = key + 1;
+
+        if (crypt == NULL || crypt->ops == NULL) {
+                erq->length = 0;
+                erq->flags |= IW_ENCODE_DISABLED;
+                return 0;
+        }
+
+        if (strcmp(crypt->ops->name, "WEP") != 0) {
+                /* only WEP is supported with wireless extensions, so just
+                 * report that encryption is used */
+                erq->length = 0;
+                erq->flags |= IW_ENCODE_ENABLED;
+                return 0;
+        }
+
+        len = crypt->ops->get_key(keybuf, WEP_KEY_LEN, NULL, crypt->priv);
+        erq->length = (len >= 0 ? len : 0);
+
+        erq->flags |= IW_ENCODE_ENABLED;
+
+        if (ieee->open_wep)
+                erq->flags |= IW_ENCODE_OPEN;
+        else
+                erq->flags |= IW_ENCODE_RESTRICTED;
+
+        return 0;
+}
+
+EXPORT_SYMBOL(ieee80211_wx_get_scan);
+EXPORT_SYMBOL(ieee80211_wx_set_encode);
+EXPORT_SYMBOL(ieee80211_wx_get_encode);