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fragattacks/src/drivers/driver_atmel.c

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/*
* WPA Supplicant - Driver interaction with Atmel Wireless LAN drivers
* Copyright (c) 2000-2005, ATMEL Corporation
* Copyright (c) 2004-2007, 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.
*/
/******************************************************************************
Copyright 2000-2001 ATMEL Corporation.
WPA Supplicant - driver interaction with Atmel Wireless lan drivers.
This 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
(at your option) 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 Atmel wireless lan drivers; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
******************************************************************************/
/*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*/
#include "includes.h"
#include <sys/ioctl.h>
#include "wireless_copy.h"
#include "common.h"
#include "driver.h"
#include "driver_wext.h"
struct wpa_driver_atmel_data {
void *wext; /* private data for driver_wext */
void *ctx;
char ifname[IFNAMSIZ + 1];
int sock;
};
#define ATMEL_WPA_IOCTL (SIOCIWFIRSTPRIV + 2)
#define ATMEL_WPA_IOCTL_PARAM (SIOCIWFIRSTPRIV + 3)
#define ATMEL_WPA_IOCTL_GET_PARAM (SIOCIWFIRSTPRIV + 4)
/* ATMEL_WPA_IOCTL ioctl() cmd: */
enum {
SET_WPA_ENCRYPTION = 1,
SET_CIPHER_SUITES = 2,
MLME_STA_DEAUTH = 3,
MLME_STA_DISASSOC = 4
};
/* ATMEL_WPA_IOCTL_PARAM ioctl() cmd: */
enum {
ATMEL_PARAM_WPA = 1,
ATMEL_PARAM_PRIVACY_INVOKED = 2,
ATMEL_PARAM_WPA_TYPE = 3
};
#define MAX_KEY_LENGTH 40
struct atmel_param{
unsigned char sta_addr[6];
int cmd;
u8 alg;
u8 key_idx;
u8 set_tx;
u8 seq[8];
u8 seq_len;
u16 key_len;
u8 key[MAX_KEY_LENGTH];
struct{
int reason_code;
u8 state;
}mlme;
u8 pairwise_suite;
u8 group_suite;
u8 key_mgmt_suite;
};
static int atmel_ioctl(struct wpa_driver_atmel_data *drv,
struct atmel_param *param,
int len, int show_err)
{
struct iwreq iwr;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
iwr.u.data.pointer = (caddr_t) param;
iwr.u.data.length = len;
if (ioctl(drv->sock, ATMEL_WPA_IOCTL, &iwr) < 0) {
int ret;
ret = errno;
if (show_err)
perror("ioctl[ATMEL_WPA_IOCTL]");
return ret;
}
return 0;
}
static int atmel2param(struct wpa_driver_atmel_data *drv, int param, int value)
{
struct iwreq iwr;
int *i, ret = 0;
os_memset(&iwr, 0, sizeof(iwr));
os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
i = (int *) iwr.u.name;
*i++ = param;
*i++ = value;
if (ioctl(drv->sock, ATMEL_WPA_IOCTL_PARAM, &iwr) < 0) {
perror("ioctl[ATMEL_WPA_IOCTL_PARAM]");
ret = -1;
}
return ret;
}
#if 0
static int wpa_driver_atmel_set_wpa_ie(struct wpa_driver_atmel_data *drv,
const char *wpa_ie, size_t wpa_ie_len)
{
struct atmel_param *param;
int res;
size_t blen = ATMEL_GENERIC_ELEMENT_HDR_LEN + wpa_ie_len;
if (blen < sizeof(*param))
blen = sizeof(*param);
param = os_zalloc(blen);
if (param == NULL)
return -1;
param->cmd = ATMEL_SET_GENERIC_ELEMENT;
param->u.generic_elem.len = wpa_ie_len;
os_memcpy(param->u.generic_elem.data, wpa_ie, wpa_ie_len);
res = atmel_ioctl(drv, param, blen, 1);
os_free(param);
return res;
}
#endif
static int wpa_driver_atmel_set_wpa(void *priv, int enabled)
{
struct wpa_driver_atmel_data *drv = priv;
int ret = 0;
printf("wpa_driver_atmel_set_wpa %s\n", drv->ifname);
wpa_printf(MSG_DEBUG, "%s: enabled=%d", __FUNCTION__, enabled);
#if 0
if (!enabled && wpa_driver_atmel_set_wpa_ie(drv, NULL, 0) < 0)
ret = -1;
#endif
if (atmel2param(drv, ATMEL_PARAM_PRIVACY_INVOKED, enabled) < 0)
ret = -1;
if (atmel2param(drv, ATMEL_PARAM_WPA, enabled) < 0)
ret = -1;
return ret;
}
static int wpa_driver_atmel_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_atmel_data *drv = priv;
int ret = 0;
struct atmel_param *param;
u8 *buf;
u8 alg_type;
size_t blen;
char *alg_name;
switch (alg) {
case WPA_ALG_NONE:
alg_name = "none";
alg_type = 0;
break;
case WPA_ALG_WEP:
alg_name = "WEP";
alg_type = 1;
break;
case WPA_ALG_TKIP:
alg_name = "TKIP";
alg_type = 2;
break;
case WPA_ALG_CCMP:
alg_name = "CCMP";
alg_type = 3;
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 atmel_param *) buf;
param->cmd = SET_WPA_ENCRYPTION;
if (addr == NULL)
os_memset(param->sta_addr, 0xff, ETH_ALEN);
else
os_memcpy(param->sta_addr, addr, ETH_ALEN);
param->alg = alg_type;
param->key_idx = key_idx;
param->set_tx = set_tx;
os_memcpy(param->seq, seq, seq_len);
param->seq_len = seq_len;
param->key_len = key_len;
os_memcpy((u8 *)param->key, key, key_len);
if (atmel_ioctl(drv, param, blen, 1)) {
wpa_printf(MSG_WARNING, "Failed to set encryption.");
/* TODO: show key error*/
ret = -1;
}
os_free(buf);
return ret;
}
static int wpa_driver_atmel_set_countermeasures(void *priv,
int enabled)
{
/* FIX */
printf("wpa_driver_atmel_set_countermeasures - not yet "
"implemented\n");
return 0;
}
static int wpa_driver_atmel_set_drop_unencrypted(void *priv,
int enabled)
{
/* FIX */
printf("wpa_driver_atmel_set_drop_unencrypted - not yet "
"implemented\n");
return 0;
}
static int wpa_driver_atmel_mlme(void *priv, const u8 *addr, int cmd,
int reason_code)
{
struct wpa_driver_atmel_data *drv = priv;
struct atmel_param param;
int ret;
int mgmt_error = 0xaa;
os_memset(&param, 0, sizeof(param));
os_memcpy(param.sta_addr, addr, ETH_ALEN);
param.cmd = cmd;
param.mlme.reason_code = reason_code;
param.mlme.state = mgmt_error;
ret = atmel_ioctl(drv, &param, sizeof(param), 1);
return ret;
}
#if 0
static int wpa_driver_atmel_set_suites(struct wpa_driver_atmel_data *drv,
u8 pairwise_suite, u8 group_suite,
u8 key_mgmt_suite)
{
struct atmel_param param;
int ret;
os_memset(&param, 0, sizeof(param));
param.cmd = SET_CIPHER_SUITES;
param.pairwise_suite = pairwise_suite;
param.group_suite = group_suite;
param.key_mgmt_suite = key_mgmt_suite;
ret = atmel_ioctl(drv, &param, sizeof(param), 1);
return ret;
}
#endif
static int wpa_driver_atmel_deauthenticate(void *priv, const u8 *addr,
int reason_code)
{
struct wpa_driver_atmel_data *drv = priv;
printf("wpa_driver_atmel_deauthenticate\n");
wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
return wpa_driver_atmel_mlme(drv, addr, MLME_STA_DEAUTH,
reason_code);
}
static int wpa_driver_atmel_disassociate(void *priv, const u8 *addr,
int reason_code)
{
struct wpa_driver_atmel_data *drv = priv;
printf("wpa_driver_atmel_disassociate\n");
wpa_printf(MSG_DEBUG, "%s", __FUNCTION__);
return wpa_driver_atmel_mlme(drv, addr, MLME_STA_DISASSOC,
reason_code);
}
#if 0
/* Atmel driver uses specific values for each cipher suite */
static int convertSuiteToDriver(wpa_cipher suite)
{
u8 suite_type;
switch(suite) {
case CIPHER_NONE:
suite_type = 0;
break;
case CIPHER_WEP40:
suite_type = 1;
break;
case CIPHER_TKIP:
suite_type = 2;
break;
case CIPHER_WEP104:
suite_type = 5;
break;
case CIPHER_CCMP:
suite_type = 3;
break;
default:
suite_type = 2;
}
return suite_type;
}
#endif
static int
wpa_driver_atmel_associate(void *priv,
struct wpa_driver_associate_params *params)
{
struct wpa_driver_atmel_data *drv = priv;
int ret = 0;
#if 0
u8 pairwise_suite_driver;
u8 group_suite_driver;
u8 key_mgmt_suite_driver;
pairwise_suite_driver = convertSuiteToDriver(params->pairwise_suite);
group_suite_driver = convertSuiteToDriver(params->group_suite);
key_mgmt_suite_driver = convertSuiteToDriver(params->key_mgmt_suite);
if (wpa_driver_atmel_set_suites(drv, pairwise_suite_driver,
group_suite_driver,
key_mgmt_suite_driver) < 0){
printf("wpa_driver_atmel_set_suites.\n");
ret = -1;
}
if (wpa_driver_wext_set_freq(drv->wext, params->freq) < 0) {
printf("wpa_driver_atmel_set_freq.\n");
ret = -1;
}
#endif
if (wpa_driver_wext_set_ssid(drv->wext, params->ssid, params->ssid_len)
< 0) {
printf("FAILED : wpa_driver_atmel_set_ssid.\n");
ret = -1;
}
if (wpa_driver_wext_set_bssid(drv->wext, params->bssid) < 0) {
printf("FAILED : wpa_driver_atmel_set_bssid.\n");
ret = -1;
}
return ret;
}
static int wpa_driver_atmel_get_bssid(void *priv, u8 *bssid)
{
struct wpa_driver_atmel_data *drv = priv;
return wpa_driver_wext_get_bssid(drv->wext, bssid);
}
static int wpa_driver_atmel_get_ssid(void *priv, u8 *ssid)
{
struct wpa_driver_atmel_data *drv = priv;
return wpa_driver_wext_get_ssid(drv->wext, ssid);
}
static int wpa_driver_atmel_scan(void *priv, const u8 *ssid, size_t ssid_len)
{
struct wpa_driver_atmel_data *drv = priv;
return wpa_driver_wext_scan(drv->wext, ssid, ssid_len);
}
static struct wpa_scan_results * wpa_driver_atmel_get_scan_results(void *priv)
{
struct wpa_driver_atmel_data *drv = priv;
return wpa_driver_wext_get_scan_results(drv->wext);
}
static int wpa_driver_atmel_set_operstate(void *priv, int state)
{
struct wpa_driver_atmel_data *drv = priv;
return wpa_driver_wext_set_operstate(drv->wext, state);
}
static void * wpa_driver_atmel_init(void *ctx, const char *ifname)
{
struct wpa_driver_atmel_data *drv;
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;
}
drv->ctx = ctx;
os_strlcpy(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_atmel_deinit(void *priv)
{
struct wpa_driver_atmel_data *drv = priv;
wpa_driver_wext_deinit(drv->wext);
close(drv->sock);
os_free(drv);
}
const struct wpa_driver_ops wpa_driver_atmel_ops = {
.name = "atmel",
.desc = "ATMEL AT76C5XXx (USB, PCMCIA)",
.get_bssid = wpa_driver_atmel_get_bssid,
.get_ssid = wpa_driver_atmel_get_ssid,
.set_wpa = wpa_driver_atmel_set_wpa,
.set_key = wpa_driver_atmel_set_key,
.init = wpa_driver_atmel_init,
.deinit = wpa_driver_atmel_deinit,
.set_countermeasures = wpa_driver_atmel_set_countermeasures,
.set_drop_unencrypted = wpa_driver_atmel_set_drop_unencrypted,
.scan = wpa_driver_atmel_scan,
.get_scan_results2 = wpa_driver_atmel_get_scan_results,
.deauthenticate = wpa_driver_atmel_deauthenticate,
.disassociate = wpa_driver_atmel_disassociate,
.associate = wpa_driver_atmel_associate,
.set_operstate = wpa_driver_atmel_set_operstate,
};
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