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/* horst - Highly Optimized Radio Scanning Tool
*
* Copyright (C) 2005-2016 Bruno Randolf (br1@einfach.org)
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <linux/wireless.h>
#include "main.h"
#include "util.h"
extern int mon; /* monitoring socket */
static bool wext_set_freq(int fd, const char* devname, int freq)
{
struct iwreq iwr;
memset(&iwr, 0, sizeof(iwr));
strncpy(iwr.ifr_name, devname, IFNAMSIZ - 1);
iwr.ifr_name[IFNAMSIZ - 1] = '\0';
freq *= 100000;
iwr.u.freq.m = freq;
iwr.u.freq.e = 1;
if (ioctl(fd, SIOCSIWFREQ, &iwr) < 0) {
printlog("ERROR: wext set channel");
return false;
}
return true;
}
static int wext_get_freq(int fd, const char* devname)
{
struct iwreq iwr;
memset(&iwr, 0, sizeof(iwr));
strncpy(iwr.ifr_name, devname, IFNAMSIZ - 1);
iwr.ifr_name[IFNAMSIZ - 1] = '\0';
if (ioctl(fd, SIOCGIWFREQ, &iwr) < 0)
return 0;
DEBUG("FREQ %d %d\n", iwr.u.freq.m, iwr.u.freq.e);
return iwr.u.freq.m;
}
static int wext_get_channels(int fd, const char* devname,
struct channel_list* channels)
{
struct iwreq iwr;
struct iw_range range;
int i;
int band0cnt = 0;
int band1cnt = 0;
memset(&iwr, 0, sizeof(iwr));
memset(&range, 0, sizeof(range));
strncpy(iwr.ifr_name, devname, IFNAMSIZ - 1);
iwr.ifr_name[IFNAMSIZ - 1] = '\0';
iwr.u.data.pointer = (caddr_t) ⦥
iwr.u.data.length = sizeof(range);
iwr.u.data.flags = 0;
if (ioctl(fd, SIOCGIWRANGE, &iwr) < 0) {
printlog("ERROR: wext get channel list");
return 0;
}
if (range.we_version_compiled < 16) {
printlog("ERROR: wext version %d too old to get channels",
range.we_version_compiled);
return 0;
}
for (i = 0; i < range.num_frequency && i < MAX_CHANNELS; i++) {
DEBUG(" Channel %.2d: %dMHz\n", range.freq[i].i, range.freq[i].m);
channels->chan[i].chan = range.freq[i].i;
/* different drivers return different frequencies
* (e.g. ipw2200 vs mac80211) try to fix them up here */
if (range.freq[i].m > 100000000)
channels->chan[i].freq = range.freq[i].m / 100000;
else
channels->chan[i].freq = range.freq[i].m;
if (channels->chan[i].freq <= 2500)
band0cnt++;
else
band1cnt++;
}
channels->num_channels = i;
channels->num_bands = band1cnt > 0 ? 2 : 1;
channels->band[0].num_channels = band0cnt;
channels->band[1].num_channels = band1cnt;
return i;
}
/*
* ifctrl.h implementation
*/
bool ifctrl_init(void)
{
return true;
};
void ifctrl_finish(void)
{
};
bool ifctrl_iwadd_monitor(__attribute__((unused)) const char *interface,
__attribute__((unused)) const char *monitor_interface)
{
printlog("add monitor: not supported with WEXT");
return false;
}
bool ifctrl_iwdel(__attribute__((unused)) const char *interface)
{
printlog("del: not supported with WEXT");
return false;
}
bool ifctrl_iwset_monitor(__attribute__((unused)) const char *interface)
{
printlog("set monitor: not supported with WEXT");
return false;
}
bool ifctrl_iwset_freq(const char *const interface,
unsigned int freq,
__attribute__((unused)) enum chan_width width,
__attribute__((unused)) unsigned int center1)
{
if (wext_set_freq(mon, interface, freq))
return true;
return false;
}
bool ifctrl_iwget_interface_info(const char *interface)
{
conf.if_freq = wext_get_freq(mon, interface);
if (conf.if_freq == 0)
return false;
return true;
}
bool ifctrl_iwget_freqlist(__attribute__((unused)) int phy, struct channel_list* channels)
{
if (wext_get_channels(mon, conf.ifname, channels))
return true;
return false;
}
bool ifctrl_is_monitor(void)
{
return true; /* assume yes */
}
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