* apps/wireless/wapi/src/driver_wext.c
* Driver interaction with generic Wireless Extensions
*
* Copyright (C) 2017, 2019 Gregory Nutt. All rights reserved.
* Author: Simon Piriou <spiriou31@gmail.com>
* Gregory Nutt <gnutt@nuttx.org>
*
* Adapted for NuttX from the driver_ext.c of WPA suplicant written
* originally by Jouni Malinen
*
* Copyright (c) 2003-2015, Jouni Malinen <j@w1.fi>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
* When used with WE-18 or newer, this interface can be used as-is with
* number of drivers. In addition to this, some of the common functions
* in this file can be used by other driver interface implementations that
* use generic WE ioctls, but require private ioctls for some of the
* functionality.
*/
* Included Files
****************************************************************************/
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <inttypes.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <assert.h>
#include <debug.h>
#include "wireless/wapi.h"
* Public Functions
****************************************************************************/
* Name: wpa_driver_wext_get_key_ext
*
* Description:
*
* Input Parameters:
* sockfd - Opened network socket
* ifname - Interface name
*
* Returned Value:
*
****************************************************************************/
int wpa_driver_wext_get_key_ext(int sockfd, FAR const char *ifname,
enum wpa_alg_e *alg, FAR char *key,
size_t *req_len)
{
struct iw_encode_ext *ext;
struct iwreq iwr;
int ret;
ext = malloc(sizeof(*ext) + *req_len);
if (ext == NULL)
{
return -ENOMEM;
}
memset(&iwr, 0, sizeof(iwr));
strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
iwr.u.encoding.pointer = (caddr_t) ext;
iwr.u.encoding.length = sizeof(*ext) + *req_len;
ret = ioctl(sockfd, SIOCGIWENCODEEXT, (unsigned long)&iwr);
if (ret >= 0)
{
switch (ext->alg)
{
case IW_ENCODE_ALG_NONE:
*alg = WPA_ALG_NONE;
break;
case IW_ENCODE_ALG_WEP:
*alg = WPA_ALG_WEP;
break;
case IW_ENCODE_ALG_TKIP:
*alg = WPA_ALG_TKIP;
break;
case IW_ENCODE_ALG_CCMP:
*alg = WPA_ALG_CCMP;
break;
default:
free(ext);
return -EINVAL;
}
if (key && ext->key_len < *req_len)
{
memcpy(key, ext->key, ext->key_len);
*req_len = ext->key_len;
}
}
free(ext);
return ret;
}
* Name: wpa_driver_wext_set_key_ext
*
* Description:
*
* Input Parameters:
* sockfd - Opened network socket
* ifname - Interface name
*
* Returned Value:
*
****************************************************************************/
int wpa_driver_wext_set_key_ext(int sockfd, FAR const char *ifname,
enum wpa_alg_e alg, FAR const char *key,
size_t key_len)
{
struct iwreq iwr;
int ret = 0;
struct iw_encode_ext *ext;
DEBUGASSERT(ifname != NULL && key != NULL && key_len > 0);
ext = malloc(sizeof(*ext) + key_len);
if (ext == NULL)
{
return -ENOMEM;
}
memset(&iwr, 0, sizeof(iwr));
strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
iwr.u.encoding.pointer = (caddr_t) ext;
iwr.u.encoding.length = sizeof(*ext) + key_len;
if (key && key_len)
{
memcpy(ext + 1, key, key_len);
ext->key_len = key_len;
}
switch (alg)
{
case WPA_ALG_NONE:
ext->alg = IW_ENCODE_ALG_NONE;
break;
case WPA_ALG_WEP:
ext->alg = IW_ENCODE_ALG_WEP;
break;
case WPA_ALG_TKIP:
ext->alg = IW_ENCODE_ALG_TKIP;
break;
case WPA_ALG_CCMP:
ext->alg = IW_ENCODE_ALG_CCMP;
break;
default:
nerr("ERROR: Unknown algorithm %d", alg);
free(ext);
return -EINVAL;
}
if (ioctl(sockfd, SIOCSIWENCODEEXT, (unsigned long)&iwr) < 0)
{
ret = -errno;
nerr("ERROR: ioctl[SIOCSIWENCODEEXT]: %d", errno);
}
free(ext);
return ret;
}
* Name: wpa_driver_wext_associate
*
* Description:
*
* Input Parameters:
* wconfig - Describes the wireless configuration.
*
* Returned Value:
*
****************************************************************************/
int wpa_driver_wext_associate(FAR struct wpa_wconfig_s *wconfig)
{
struct iwreq req;
int sockfd;
int ret;
DEBUGASSERT(wconfig != NULL);
ninfo("sta_mode=%u auth_wpa=%08x cipher_mode=%08x alg=%d\n",
wconfig->sta_mode, wconfig->auth_wpa, wconfig->cipher_mode,
wconfig->alg);
ninfo("ifname=%s ssid[%u]=%s passphrase[%u]=%s\n",
wconfig->ifname, wconfig->ssidlen, wconfig->ssid, wconfig->phraselen,
wconfig->passphrase);
sockfd = wapi_make_socket();
if (sockfd < 0)
{
return sockfd;
}
strlcpy(req.ifr_name, wconfig->ifname, IFNAMSIZ);
ret = wapi_set_mode(sockfd, wconfig->ifname, wconfig->sta_mode);
if (ret < 0)
{
nerr("ERROR: Fail set sta mode: %d\n", ret);
goto close_socket;
}
ret = wpa_driver_wext_set_auth_param(sockfd, wconfig->ifname,
IW_AUTH_WPA_VERSION,
wconfig->auth_wpa);
if (ret < 0)
{
nerr("ERROR: Fail set wpa version: %d\n", ret);
goto close_socket;
}
ret = wpa_driver_wext_set_auth_param(sockfd, wconfig->ifname,
IW_AUTH_CIPHER_PAIRWISE,
wconfig->cipher_mode);
if (ret < 0)
{
nerr("ERROR: Fail set cipher mode: %d\n", ret);
goto close_socket;
}
if (wconfig->freq)
{
ret = wapi_set_freq(sockfd, wconfig->ifname,
wconfig->freq,
wconfig->flag == WAPI_FREQ_FIXED ?
IW_FREQ_FIXED : IW_FREQ_AUTO);
if (ret < 0)
{
nerr("WARNING: Fail set freq: %d\n", ret);
}
}
if (wconfig->phraselen > 0)
{
ret = wpa_driver_wext_set_key_ext(sockfd, wconfig->ifname,
wconfig->alg,
wconfig->passphrase,
wconfig->phraselen);
if (ret < 0)
{
nerr("ERROR: Fail set key: %d\n", ret);
goto close_socket;
}
}
if (wconfig->ssid)
{
ret = wapi_set_essid(sockfd, wconfig->ifname,
wconfig->ssid, WAPI_ESSID_ON);
if (ret < 0)
{
nerr("ERROR: Fail set ssid: %d\n", ret);
goto close_socket;
}
}
else if (wconfig->bssid)
{
ret = wapi_set_ap(sockfd, wconfig->ifname,
(FAR const struct ether_addr *)wconfig->bssid);
if (ret < 0)
{
nerr("ERROR: Fail set bssid: %d\n", ret);
}
}
close_socket:
close(sockfd);
return ret;
}
* Name: wpa_driver_wext_set_auth_param
*
* Description:
*
* Input Parameters:
*
* Returned Value:
*
****************************************************************************/
static int wpa_driver_wext_process_auth_param(int sockfd,
FAR const char *ifname,
int idx,
uint32_t *value,
bool set)
{
struct iwreq iwr;
int errcode;
int ret = 0;
DEBUGASSERT(ifname != NULL);
memset(&iwr, 0, sizeof(iwr));
strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
iwr.u.param.flags = idx & IW_AUTH_INDEX;
iwr.u.param.value = set ? *value : 0;
if (ioctl(sockfd, set ? SIOCSIWAUTH : SIOCGIWAUTH,
(unsigned long)&iwr) < 0)
{
errcode = errno;
if (errcode != EOPNOTSUPP)
{
nerr("ERROR: SIOCSIWAUTH(param %d value 0x%" PRIx32
") failed: %d)",
idx, *value, errcode);
}
ret = -errcode;
}
if (ret == 0 && !set)
{
*value = iwr.u.param.value;
}
return ret;
}
* Name: wpa_driver_wext_set_auth_param
*
* Description:
*
* Input Parameters:
*
* Returned Value:
*
****************************************************************************/
int wpa_driver_wext_set_auth_param(int sockfd, FAR const char *ifname,
int idx, uint32_t value)
{
return wpa_driver_wext_process_auth_param(sockfd, ifname,
idx, &value, true);
}
* Name: wpa_driver_wext_get_auth_param
*
* Description:
*
* Input Parameters:
*
* Returned Value:
*
****************************************************************************/
int wpa_driver_wext_get_auth_param(int sockfd, FAR const char *ifname,
int idx, uint32_t *value)
{
return wpa_driver_wext_process_auth_param(sockfd, ifname,
idx, value, false);
}
* Name: wpa_driver_wext_disconnect
*
* Description:
*
* Input Parameters:
*
* Returned Value:
*
****************************************************************************/
void wpa_driver_wext_disconnect(int sockfd, FAR const char *ifname)
{
uint8_t ssid[WAPI_ESSID_MAX_SIZE + 1];
const struct ether_addr bssid =
{
};
struct iwreq iwr;
int i;
* otherwise the driver might interpret the cleared BSSID and random
* SSID as an attempt to create a new ad-hoc network.
*/
memset(&iwr, 0, sizeof(iwr));
strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
if (ioctl(sockfd, SIOCGIWMODE, (unsigned long)&iwr) < 0)
{
nerr("ioctl[SIOCGIWMODE]: %s\n", strerror(errno));
iwr.u.mode = IW_MODE_INFRA;
}
if (iwr.u.mode == IW_MODE_INFRA)
{
if (wapi_set_ap(sockfd, ifname, &bssid) < 0)
{
nerr("WEXT: Failed to clear BSSID " "selection on disconnect\n");
}
* to associate with something even if it does not understand
* SIOCSIWMLME commands (or tries to associate automatically
* after deauth/disassoc).
*/
for (i = 0; i < WAPI_ESSID_MAX_SIZE; i++)
{
ssid[i] = rand() & 0xff;
}
ssid[WAPI_ESSID_MAX_SIZE] = '\0';
if (wapi_set_essid(sockfd, ifname,
(FAR const char *)ssid, WAPI_ESSID_OFF) < 0)
{
nerr("WEXT: Failed to set bogus " "SSID to disconnect\n");
}
}
}