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nuttx-apps/wireless/wapi/src/driver_wext.c

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/************************************************************************************
* apps/wireless/wapi/src/driver_wext.c
* Driver interaction with generic Wireless Extensions
*
* Copyright (C) 2017 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.
*
************************************************************************************/
/* This file implements a driver interface for the Linux Wireless Extensions.
* 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 <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <assert.h>
#include <debug.h>
#include "wireless/wapi.h"
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: wpa_driver_wext_set_ssid
*
* Description:
* Set SSID, SIOCSIWESSID
*
* Input Parameters:
* sockfd - Opened network socket
* ifname - Interface name
* ssid - SSID
* ssid_len - Length of SSID (0..32)
*
* Returned Value:
* 0 on success, -1 on failure
*
************************************************************************************/
int wpa_driver_wext_set_ssid(int sockfd, FAR const char *ifname,
FAR const uint8_t *ssid, size_t ssid_len)
{
struct iwreq iwr;
int ret = 0;
char buf[33];
DEBUGASSERT(ifname != NULL && ssid != NULL && ssid_len > 0);
if (ssid_len > WAPI_ESSID_MAX_SIZE)
{
return -1;
}
memset(&iwr, 0, sizeof(iwr));
strncpy(iwr.ifr_name, ifname, IFNAMSIZ);
/* flags: 1 = ESSID is active, 0 = not (promiscuous) */
iwr.u.essid.flags = (ssid_len != 0);
memset(buf, 0, sizeof(buf));
memcpy(buf, ssid, ssid_len);
iwr.u.essid.pointer = (caddr_t) buf;
iwr.u.essid.length = ssid_len;
if (ioctl(sockfd, SIOCSIWESSID, (unsigned long)&iwr) < 0)
{
nerr("ERROR: ioctl[SIOCSIWESSID]: %d", errno);
ret = -1;
}
return ret;
}
/************************************************************************************
* Name: wpa_driver_wext_set_mode
*
* Description:
* Set wireless mode (infra/adhoc), SIOCSIWMODE
*
* Input Parameters:
* sockfd - Opened network socket
* ifname - Interface name
* mode - 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
*
* Returned Value:
* 0 on success, -1 on failure
*
************************************************************************************/
int wpa_driver_wext_set_mode(int sockfd, FAR const char *ifname, int mode)
{
struct iwreq iwr;
int ret = -1;
DEBUGASSERT(ifname != NULL);
memset(&iwr, 0, sizeof(iwr));
strncpy(iwr.ifr_name, ifname, IFNAMSIZ);
iwr.u.mode = mode;
if (ioctl(sockfd, SIOCSIWMODE, (unsigned long)&iwr) == 0)
{
ret = 0;
goto done;
}
nerr("ERROR: ioctl[SIOCSIWMODE]: %d", errno);
done:
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 uint8_t *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 -1;
}
memset(&iwr, 0, sizeof(iwr));
strncpy(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 -1;
}
if (ioctl(sockfd, SIOCSIWENCODEEXT, (unsigned long)&iwr) < 0)
{
ret = errno == EOPNOTSUPP ? -2 : -1;
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);
/* Get a socket (only so that we get access to the INET subsystem) */
sockfd = socket(PF_INETX, SOCK_WAPI, 0);
if (sockfd < 0)
{
return sockfd;
}
/* Put the driver name into the request */
strncpy(req.ifr_name, wconfig->ifname, IFNAMSIZ);
ret = wpa_driver_wext_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;
}
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);
ret = -1;
goto close_socket;
}
ret = wpa_driver_wext_set_ssid(sockfd, wconfig->ifname, wconfig->ssid,
wconfig->ssidlen);
if (ret < 0)
{
nerr("ERROR: Fail set ssid: %d\n", ret);
}
close_socket:
close(sockfd);
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)
{
struct iwreq iwr;
int errcode;
int ret = 0;
DEBUGASSERT(ifname != NULL);
memset(&iwr, 0, sizeof(iwr));
strncpy(iwr.ifr_name, ifname, IFNAMSIZ);
iwr.u.param.flags = idx & IW_AUTH_INDEX;
iwr.u.param.value = value;
if (ioctl(sockfd, SIOCSIWAUTH, (unsigned long)&iwr) < 0)
{
errcode = errno;
if (errcode != EOPNOTSUPP)
{
nerr("ERROR: SIOCSIWAUTH(param %d value 0x%x) failed: %d)",
idx, value, errcode);
}
ret = errcode == EOPNOTSUPP ? -2 : -1;
}
return ret;
}
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