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/*
* Olivier Blin (oblin)
*
* Copyright 2005 Mandriva
*
* This software may be freely redistributed under the terms of the GNU
* public license.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <linux/types.h>
#include <linux/if.h>
#include <linux/wireless.h>
#include "automatic.h"
#include "stage1.h"
#include "log.h"
#include "utils.h"
#include "wireless.h"
static int wireless_ioctl(int socket, const char *ifname, int request, struct iwreq *wrq);
static int wireless_set_mode_managed(int socket, const char *ifname);
static int wireless_disable_key(int socket, const char *ifname);
static int wireless_set_restricted_key(int socket, const char *ifname, const char *key);
static int wireless_set_essid(int socket, const char *ifname, const char *essid);
int wireless_open_socket()
{
return socket(AF_INET, SOCK_DGRAM, 0);
}
int wireless_close_socket(int socket)
{
return close(socket);
}
static int wireless_ioctl(int socket, const char *ifname, int request, struct iwreq *wrq)
{
strncpy(wrq->ifr_name, ifname, IFNAMSIZ);
return ioctl(socket, request, wrq);
}
int wireless_is_aware(int socket, const char *ifname)
{
struct iwreq wrq;
return wireless_ioctl(socket, ifname, SIOCGIWNAME, &wrq) == 0;
}
static int wireless_set_mode_managed(int socket, const char *ifname)
{
struct iwreq wrq;
wrq.u.mode = IW_MODE_INFRA; /* managed */
return wireless_ioctl(socket, ifname, SIOCSIWMODE, &wrq) == 0;
}
static int wireless_set_essid(int socket, const char *ifname, const char *essid)
{
struct iwreq wrq;
wrq.u.essid.flags = 1;
wrq.u.essid.pointer = (void *) essid;
wrq.u.essid.length = strlen(essid) + 1;
return wireless_ioctl(socket, ifname, SIOCSIWESSID, &wrq) == 0;
}
static int wireless_disable_key(int socket, const char *ifname)
{
struct iwreq wrq;
wrq.u.data.flags = IW_ENCODE_DISABLED;
wrq.u.data.pointer = NULL;
wrq.u.data.length = 0;
return wireless_ioctl(socket, ifname, SIOCSIWENCODE, &wrq) == 0;
}
static int wireless_set_restricted_key(int socket, const char *ifname, const char *key)
{
struct iwreq wrq;
char real_key[IW_ENCODING_TOKEN_MAX];
int key_len = 0;
unsigned int tmp;
while (sscanf(key + 2*key_len, "%2X", &tmp) == 1)
real_key[key_len++] = (char) tmp;
wrq.u.data.flags = IW_ENCODE_RESTRICTED;
wrq.u.data.pointer = (char *) real_key;
wrq.u.data.length = key_len;
return wireless_ioctl(socket, ifname, SIOCSIWENCODE, &wrq) == 0;
}
enum return_type configure_wireless(const char *ifname)
{
enum return_type results;
char * questions[] = { "ESSID", "WEP key", NULL };
char * questions_auto[] = { "essid", "wep_key" };
static char ** answers = NULL;
int wsock = wireless_open_socket();
if (!wireless_is_aware(wsock, ifname)) {
log_message("interface %s doesn't support wireless", ifname);
wireless_close_socket(wsock);
return RETURN_OK;
}
results = ask_from_entries_auto("Please enter your wireless settings. "
"The ESSID is your wireless network identifier. "
"The WEP key must be entered in hexadecimal, without any separator.",
questions, &answers, 32, questions_auto, NULL);
if (results != RETURN_OK) {
wireless_close_socket(wsock);
return RETURN_BACK;
}
if (!wireless_set_mode_managed(wsock, ifname)) {
stg1_error_message("unable to set mode Managed on device \"%s\": %s", ifname, strerror(errno));
wireless_close_socket(wsock);
return RETURN_ERROR;
}
if (answers[1] && !streq(answers[1], "")) {
log_message("setting WEP key \"%s\" on device \"%s\"", answers[1], ifname);
if (!wireless_set_restricted_key(wsock, ifname, answers[1])) {
stg1_error_message("unable to set WEP key \"%s\" on device \"%s\": %s", answers[1], ifname, strerror(errno));
return RETURN_ERROR;
}
} else {
log_message("disabling WEP key on device \"%s\"", ifname);
if (!wireless_disable_key(wsock, ifname)) {
stg1_error_message("unable to disable WEP key on device \"%s\": %s", ifname, strerror(errno));
return RETURN_ERROR;
}
}
/* most devices perform discovery when ESSID is set, it needs to be last */
log_message("setting ESSID \"%s\" on device \"%s\"", answers[0], ifname);
if (!wireless_set_essid(wsock, ifname, answers[0])) {
stg1_error_message("unable to set ESSID \"%s\" on device \"%s\": %s", answers[0], ifname, strerror(errno));
return RETURN_ERROR;
}
wireless_close_socket(wsock);
return RETURN_OK;
}
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