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/*
* WPA Supplicant - driver interaction with Linux ipw2100/2200 drivers
* Copyright (c) 2005 Zhu Yi <yi.zhu@intel.com>
* Copyright (c) 2004 Lubomir Gelo <lgelo@cnc.sk>
* Copyright (c) 2003-2004, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*
* Please note that ipw2100/2200 drivers change to use generic Linux wireless
* extensions if the kernel includes support for WE-18 or newer (Linux 2.6.13
* or newer). driver_wext.c should be used in those cases.
*/
#include "includes.h"
#include <sys/ioctl.h>
#include "wireless_copy.h"
#include "common.h"
#include "driver.h"
#include "l2_packet.h"
#include "driver_wext.h"
#include "wpa_supplicant.h"
struct wpa_driver_ipw_data {
void *wext; /* private data for driver_wext */
void *ctx;
char ifname[IFNAMSIZ + 1];
int sock;
};
/* following definitions must be kept in sync with ipw2100.c and ipw2200.c */
#define IPW_IOCTL_WPA_SUPPLICANT SIOCIWFIRSTPRIV+30
#define IPW_CMD_SET_WPA_PARAM 1
#define IPW_CMD_SET_WPA_IE 2
#define IPW_CMD_SET_ENCRYPTION 3
#define IPW_CMD_MLME 4
#define IPW_PARAM_WPA_ENABLED 1
#define IPW_PARAM_TKIP_COUNTERMEASURES 2
#define IPW_PARAM_DROP_UNENCRYPTED 3
#define IPW_PARAM_PRIVACY_INVOKED 4
#define IPW_PARAM_AUTH_ALGS 5
#define IPW_PARAM_IEEE_802_1X 6
#define IPW_MLME_STA_DEAUTH 1
#define IPW_MLME_STA_DISASSOC 2
#define IPW_CRYPT_ERR_UNKNOWN_ALG 2
#define IPW_CRYPT_ERR_UNKNOWN_ADDR 3
#define IPW_CRYPT_ERR_CRYPT_INIT_FAILED 4
#define IPW_CRYPT_ERR_KEY_SET_FAILED 5
#define IPW_CRYPT_ERR_TX_KEY_SET_FAILED 6
#define IPW_CRYPT_ERR_CARD_CONF_FAILED 7
#define IPW_CRYPT_ALG_NAME_LEN 16
struct ipw_param {
u32 cmd;
u8 sta_addr[ETH_ALEN];
union {
struct {
u8 name;
u32 value;
} wpa_param;
struct {
u32 len;
u8 reserved[32];
u8 data[0];
} wpa_ie;
struct{
u32 command;
u32 reason_code;
} mlme;
struct {
u8 alg[IPW_CRYPT_ALG_NAME_LEN];
u8 set_tx;
u32 err;
u8 idx;
u8 seq[8];
u16 key_len;
u8 key[0];
} crypt;
} u;
};
/* end of ipw2100.c and ipw2200.c code */
static int ipw_ioctl(struct wpa_driver_ipw_data *drv,
struct ipw_param *param, int len, int show_err)
{
struct iwreq iwr;
os_memset(&iwr, 0, sizeof(iwr));
os_strncpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.data.pointer = (caddr_t) param;
iwr.u.data.length = len;
if (ioctl(drv->sock, IPW_IOCTL_WPA_SUPPLICANT, &iwr) < 0) {
int ret = errno;
if (show_err)
perror("ioctl[IPW_IOCTL_WPA_SUPPLICANT]");
return ret;
}
return 0;
}
static void ipw_show_set_key_error(struct ipw_param *param)
{
switch (param->u.crypt.err) {
case IPW_CRYPT_ERR_UNKNOWN_ALG:
wpa_printf(MSG_INFO, "Unknown algorithm '%s'.",
param->u.crypt.alg);
wpa_printf(MSG_INFO, "You may need to load kernel module to "
"register that algorithm.");
wpa_printf(MSG_INFO, "E.g., 'modprobe ieee80211_crypt_wep' for"
" WEP.");
break;
case IPW_CRYPT_ERR_UNKNOWN_ADDR:
wpa_printf(MSG_INFO, "Unknown address " MACSTR ".",
MAC2STR(param->sta_addr));
break;
case IPW_CRYPT_ERR_CRYPT_INIT_FAILED:
wpa_printf(MSG_INFO, "Crypt algorithm initialization failed.");
break;
case IPW_CRYPT_ERR_KEY_SET_FAILED:
wpa_printf(MSG_INFO, "Key setting failed.");
break;
case IPW_CRYPT_ERR_TX_KEY_SET_FAILED:
wpa_printf(MSG_INFO, "TX key index setting failed.");
break;
case IPW_CRYPT_ERR_CARD_CONF_FAILED:
wpa_printf(MSG_INFO, "Card configuration failed.");
break;
}
}
static int ipw_set_wpa_ie(struct wpa_driver_ipw_data *drv,
const u8 *wpa_ie, size_t wpa_ie_len)
{
struct ipw_param *param;
int ret;
size_t blen = sizeof(*param) + wpa_ie_len;
param = os_zalloc(blen);
if (param == NULL)
return -1;
param->cmd = IPW_CMD_SET_WPA_IE;
param->u.wpa_ie.len = wpa_ie_len;
os_memcpy(param->u.wpa_ie.data, wpa_ie, wpa_ie_len);
ret = ipw_ioctl(drv, param, blen, 1);
os_free(param);
return ret;
}
static int ipw_set_wpa_param(struct wpa_driver_ipw_data *drv, u8 name,
u32 value)
{
struct ipw_param param;
os_memset(&param, 0, sizeof(param));
param.cmd = IPW_CMD_SET_WPA_PARAM;
param.u.wpa_param.name = name;
param.u.wpa_param.value = value;
return ipw_ioctl(drv, &param, sizeof(param), 1);
}
static int ipw_mlme(struct wpa_driver_ipw_data *drv, const u8 *addr,
int cmd, int reason)
{
struct ipw_param param;
os_memset(&param, 0, sizeof(param));
os_memcpy(param.sta_addr, addr, ETH_ALEN);
param.cmd = IPW_CMD_MLME;
param.u.mlme.command = cmd;
param.u.mlme.reason_code = reason;
return ipw_ioctl(drv, &param, sizeof(param), 1);
}
static int wpa_driver_ipw_set_wpa(void *priv, int enabled)
{
struct wpa_driver_ipw_data *drv = priv;
int ret = 0;
wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
if (!enabled && ipw_set_wpa_ie(drv, NULL, 0) < 0)
ret = -1;
if (ipw_set_wpa_param(drv, IPW_PARAM_WPA_ENABLED, enabled) < 0)
ret = -1;
return ret;
}
static int wpa_driver_ipw_set_key(void *priv, wpa_alg alg,
const u8 *addr, int key_idx, int set_tx,
const u8 *seq, size_t seq_len,
const u8 *key, size_t key_len)
{
struct wpa_driver_ipw_data *drv = priv;
struct ipw_param *param;
u8 *buf;
size_t blen;
int ret = 0;
char *alg_name;
switch (alg) {
case WPA_ALG_NONE:
alg_name = "none";
break;
case WPA_ALG_WEP:
alg_name = "WEP";
break;
case WPA_ALG_TKIP:
alg_name = "TKIP";
break;
case WPA_ALG_CCMP:
alg_name = "CCMP";
break;
default:
return -1;
}
wpa_printf(MSG_DEBUG, "%s: alg=%s key_idx=%d set_tx=%d seq_len=%lu "
"key_len=%lu", __FUNCTION__, alg_name, key_idx, set_tx,
(unsigned long) seq_len, (unsigned long) key_len);
if (seq_len > 8)
return -2;
blen = sizeof(*param) + key_len;
buf = os_zalloc(blen);
if (buf == NULL)
return -1;
param = (struct ipw_param *) buf;
param->cmd = IPW_CMD_SET_ENCRYPTION;
os_memset(param->sta_addr, 0xff, ETH_ALEN);
os_strncpy((char *) param->u.crypt.alg, alg_name,
IPW_CRYPT_ALG_NAME_LEN);
param->u.crypt.set_tx = set_tx ? 1 : 0;
param->u.crypt.idx = key_idx;
os_memcpy(param->u.crypt.seq, seq, seq_len);
param->u.crypt.key_len = key_len;
os_memcpy((u8 *) (param + 1), key, key_len);
if (ipw_ioctl(drv, param, blen, 1)) {
wpa_printf(MSG_WARNING, "Failed to set encryption.");
ipw_show_set_key_error(param);
ret = -1;
}
os_free(buf);
return ret;
}
static int wpa_driver_ipw_set_countermeasures(void *priv, int enabled)
{
struct wpa_driver_ipw_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
return ipw_set_wpa_param(drv, IPW_PARAM_TKIP_COUNTERMEASURES,
enabled);
}
static int wpa_driver_ipw_set_drop_unencrypted(void *priv, int enabled)
{
struct wpa_driver_ipw_data *drv = priv;
wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
return ipw_set_wpa_param(drv, IPW_PARAM_DROP_UNENCRYPTED,
enabled);
}
static int wpa_driver_ipw_deauthenticate(void *priv, const u8 *addr,
int reason_code)
{
struct wpa_driver_ipw_data *drv = priv;
return ipw_mlme(drv, addr, IPW_MLME_STA_DEAUTH, reason_code);
}
static int wpa_driver_ipw_disassociate(void *priv, const u8 *addr,
int reason_code)
{
struct wpa_driver_ipw_data *drv = priv;
return ipw_mlme(drv, addr, IPW_MLME_STA_DISASSOC, reason_code);
}
static int
wpa_driver_ipw_associate(void *priv, struct wpa_driver_associate_params *params)
{
struct wpa_driver_ipw_data *drv = priv;
int ret = 0;
int unencrypted_eapol;
if (ipw_set_wpa_ie(drv, params->wpa_ie, params->wpa_ie_len) < 0)
ret = -1;
if (wpa_driver_wext_set_ssid(drv->wext, params->ssid,
params->ssid_len) < 0)
ret = -1;
if (wpa_driver_wext_set_bssid(drv->wext, params->bssid) < 0)
ret = -1;
if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
params->key_mgmt_suite == KEY_MGMT_PSK)
unencrypted_eapol = 0;
else
unencrypted_eapol = 1;
if (ipw_set_wpa_param(drv, IPW_PARAM_IEEE_802_1X,
unencrypted_eapol) < 0) {
wpa_printf(MSG_DEBUG, "ipw: Failed to configure "
"ieee_802_1x param");
}
return ret;
}
static int wpa_driver_ipw_set_auth_alg(void *priv, int auth_alg)
{
struct wpa_driver_ipw_data *drv = priv;
int algs = 0;
if (auth_alg & AUTH_ALG_OPEN_SYSTEM)
algs |= 1;
if (auth_alg & AUTH_ALG_SHARED_KEY)
algs |= 2;
if (auth_alg & AUTH_ALG_LEAP)
algs |= 4;
if (algs == 0)
algs = 1; /* at least one algorithm should be set */
wpa_printf(MSG_DEBUG, "%s: auth_alg=0x%x", __FUNCTION__, algs);
return ipw_set_wpa_param(drv, IPW_PARAM_AUTH_ALGS, algs);
}
static int wpa_driver_ipw_get_bssid(void *priv, u8 *bssid)
{
struct wpa_driver_ipw_data *drv = priv;
return wpa_driver_wext_get_bssid(drv->wext, bssid);
}
static int wpa_driver_ipw_get_ssid(void *priv, u8 *ssid)
{
struct wpa_driver_ipw_data *drv = priv;
return wpa_driver_wext_get_ssid(drv->wext, ssid);
}
static int wpa_driver_ipw_scan(void *priv, const u8 *ssid, size_t ssid_len)
{
struct wpa_driver_ipw_data *drv = priv;
return wpa_driver_wext_scan(drv->wext, ssid, ssid_len);
}
static int wpa_driver_ipw_get_scan_results(void *priv,
struct wpa_scan_result *results,
size_t max_size)
{
struct wpa_driver_ipw_data *drv = priv;
return wpa_driver_wext_get_scan_results(drv->wext, results, max_size);
}
static int wpa_driver_ipw_set_operstate(void *priv, int state)
{
struct wpa_driver_ipw_data *drv = priv;
return wpa_driver_wext_set_operstate(drv->wext, state);
}
static void * wpa_driver_ipw_init(void *ctx, const char *ifname)
{
struct wpa_driver_ipw_data *drv;
int ver;
wpa_printf(MSG_DEBUG, "%s is called", __FUNCTION__);
drv = os_zalloc(sizeof(*drv));
if (drv == NULL)
return NULL;
drv->wext = wpa_driver_wext_init(ctx, ifname);
if (drv->wext == NULL) {
os_free(drv);
return NULL;
}
ver = wpa_driver_wext_get_version(drv->wext);
if (ver >= 18) {
wpa_printf(MSG_WARNING, "Linux wireless extensions version %d "
"detected.", ver);
wpa_printf(MSG_WARNING, "ipw2x00 driver uses driver_wext "
"(-Dwext) instead of driver_ipw.");
}
drv->ctx = ctx;
os_strncpy(drv->ifname, ifname, sizeof(drv->ifname));
drv->sock = socket(PF_INET, SOCK_DGRAM, 0);
if (drv->sock < 0) {
wpa_driver_wext_deinit(drv->wext);
os_free(drv);
return NULL;
}
return drv;
}
static void wpa_driver_ipw_deinit(void *priv)
{
struct wpa_driver_ipw_data *drv = priv;
wpa_driver_wext_deinit(drv->wext);
close(drv->sock);
os_free(drv);
}
const struct wpa_driver_ops wpa_driver_ipw_ops = {
.name = "ipw",
.desc = "Intel ipw2100/2200 driver (old; use wext with Linux 2.6.13 "
"or newer)",
.get_bssid = wpa_driver_ipw_get_bssid,
.get_ssid = wpa_driver_ipw_get_ssid,
.set_wpa = wpa_driver_ipw_set_wpa,
.set_key = wpa_driver_ipw_set_key,
.set_countermeasures = wpa_driver_ipw_set_countermeasures,
.set_drop_unencrypted = wpa_driver_ipw_set_drop_unencrypted,
.scan = wpa_driver_ipw_scan,
.get_scan_results = wpa_driver_ipw_get_scan_results,
.deauthenticate = wpa_driver_ipw_deauthenticate,
.disassociate = wpa_driver_ipw_disassociate,
.associate = wpa_driver_ipw_associate,
.set_auth_alg = wpa_driver_ipw_set_auth_alg,
.init = wpa_driver_ipw_init,
.deinit = wpa_driver_ipw_deinit,
.set_operstate = wpa_driver_ipw_set_operstate,
};