os_wireless_ext.c

linux下可以用来通过802.1x认证

/**
 * A client-side 802.1x implementation supporting EAP/TLS
 *
 * This code is released under both the GPL version 2 and BSD licenses.
 * Either license may be used.  The respective licenses are found below.
 *
 * Copyright (C) 2002 Bryan D. Payne & Nick L. Petroni Jr.
 * All Rights Reserved
 *
 * --- GPL Version 2 License ---
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * --- BSD License ---
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  - Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  - 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.
 *  - All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *       This product includes software developed by the University of
 *       Maryland at College Park and its contributors.
 *  - Neither the name of the University 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.
 */

/*******************************************************************
 * Hardware dependent functions for Wireless extensions
 * 
 * File: eapol-wirelessext.c
 *
 * Authors: [e-mail], [e-mail]
 *
 * $Id: os_wireless_ext.c,v 1.3 2003/03/03 23:29:02 npetroni Exp $
 * $Date: 2003/03/03 23:29:02 $ 
 *******************************************************************/

#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <linux/wireless.h>
#include <sys/ioctl.h>
#include "wireless/os_wireless_ext.h"
#include <unistd.h>
#include "logging.h"



int
eapol_wireless_get_bssid(char *device, u_char *bssid)
{
  int skfd;            /* the socket */
  struct iwreq wrq;

  /* Get a socket */
  skfd = socket(AF_INET, SOCK_DGRAM, 0);
  strncpy(wrq.ifr_name, device, IFNAMSIZ);
  if (ioctl(skfd, SIOCGIWAP, &wrq) >= 0) {
    memcpy(bssid, wrq.u.ap_addr.sa_data, 6);
  }
  else {
    return -1;
  }
  close(skfd);
  return 0;
}

int
eapol_wireless_get_ssid(char *device, char *ssid)
{
  int skfd;            /* the socket */
  struct iwreq wrq;
  
  /* Get a socket */
  skfd = socket(AF_INET, SOCK_DGRAM, 0);  
  strncpy(wrq.ifr_name, device, IFNAMSIZ);
  wrq.u.essid.pointer = (caddr_t) ssid;
  wrq.u.essid.length=0;
  wrq.u.essid.flags = 0;
  if (ioctl(skfd, SIOCGIWESSID, &wrq) < 0) {
    return -1;
  }
  close(skfd);
  return 0;
}

/* This function graciously provided by 
 Denis Belanger <[e-mail]>
 along with the significant crypto functionality in eapcryt.c
*/
int
eapol_wireless_set_key(char *device, u_char *key, int keylen, int index)
{
  int rc = 0;
  int skfd;
  struct iwreq wrq;

  skfd = socket(AF_INET, SOCK_DGRAM, 0);

  strncpy(wrq.ifr_name, device, IFNAMSIZ);

  wrq.u.data.flags = ((index & 0x7f) + 1) & IW_ENCODE_INDEX;
  wrq.u.data.length = keylen;
  wrq.u.data.pointer = (caddr_t)key;

  if (ioctl(skfd, SIOCSIWENCODE, &wrq) < 0) {
    xlogf(DEBUG_NORMAL, "Failed to set a WEP key\n");
    rc =  -1;
  }
  else {
	xlogf(DEBUG_NORMAL, "Successfully set WEP key "
	      " [%d]\n", (index & 0x7f)+1);
    if (index & 0x80) {
      /* This is an unicast key: use it for transmission */
      strncpy(wrq.ifr_name, device, IFNAMSIZ);

      wrq.u.data.flags = ((index & 0x7f) + 1) & IW_ENCODE_INDEX;
      wrq.u.data.length = 0;
      wrq.u.data.pointer = (caddr_t)NULL;

      if (ioctl(skfd, SIOCSIWENCODE, &wrq) < 0) {
	xlogf(DEBUG_NORMAL, "Failed to set the WEP transmit key ID\n");
	rc =  -1;
      }
      else
	xlogf(DEBUG_NORMAL, "Successfully set the WEP transmit key "
	      " [%d]\n", (index & 0x7f)+1);
    }
  }

  close(skfd);
  return rc;
}

int eapol_wireless_init()
{
  return 0;
}

int eapol_wireless_cleanup()
{
  return 0;
}

/*** EOF ***/