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linux.c
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linux.c
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/*
* OS dependent APIs for Linux
*
* Copyright (C) 2006, 2007, 2008 Thomas d'Otreppe
* Copyright (C) 2004, 2005 Christophe Devine
*
* 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
*/
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <netpacket/packet.h>
#include <linux/if_ether.h>
#include <linux/if.h>
#include <linux/wireless.h>
#include <netinet/in.h>
#include <linux/if_tun.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <dirent.h>
#include <sys/utsname.h>
#include "radiotap/radiotap-parser.h"
/* radiotap-parser defines types like u8 that
* ieee80211_radiotap.h needs
*
* we use our local copy of ieee80211_radiotap.h
*
* - since we can't support extensions we don't understand
* - since linux does not include it in userspace headers
*/
#include "radiotap/ieee80211_radiotap.h"
#include "osdep.h"
//#include "pcap.h"
#include "crctable_osdep.h"
#include "common.h"
#include "byteorder.h"
#define uchar unsigned char
typedef enum {
DT_NULL = 0,
DT_WLANNG,
DT_HOSTAP,
DT_MADWIFI,
DT_MADWIFING,
DT_BCM43XX,
DT_ORINOCO,
DT_ZD1211RW,
DT_ACX,
DT_MAC80211_RT,
DT_AT76USB,
DT_IPW2200
} DRIVER_TYPE;
static const char * szaDriverTypes[] = {
[DT_NULL] = "Unknown",
[DT_WLANNG] = "Wlan-NG",
[DT_HOSTAP] = "HostAP",
[DT_MADWIFI] = "Madwifi",
[DT_MADWIFING] = "Madwifi-NG",
[DT_BCM43XX] = "BCM43xx",
[DT_ORINOCO] = "Orinoco",
[DT_ZD1211RW] = "ZD1211RW",
[DT_ACX] = "ACX",
[DT_MAC80211_RT] = "Mac80211-Radiotap",
[DT_AT76USB] = "Atmel 76_usb",
[DT_IPW2200] = "ipw2200"
};
/*
* XXX need to have a different read/write/open function for each Linux driver.
*/
struct priv_linux {
int fd_in, arptype_in;
int fd_out, arptype_out;
int fd_main;
int fd_rtc;
DRIVER_TYPE drivertype; /* inited to DT_UNKNOWN on allocation by wi_alloc */
//FILE *f_cap_in;
//struct pcap_file_header pfh_in;
int sysfs_inject;
int channel;
int freq;
int rate;
int tx_power;
char *wlanctlng; /* XXX never set */
char *iwpriv;
char *iwconfig;
char *ifconfig;
char *wl;
char *iw;
char *main_if;
unsigned char pl_mac[6];
int inject_wlanng;
};
#ifndef ETH_P_80211_RAW
#define ETH_P_80211_RAW 25
#endif
#define ARPHRD_IEEE80211 801
#define ARPHRD_IEEE80211_PRISM 802
#define ARPHRD_IEEE80211_FULL 803
#ifndef NULL_MAC
#define NULL_MAC "\x00\x00\x00\x00\x00\x00"
#endif
unsigned long calc_crc_osdep( unsigned char * buf, int len)
{
unsigned long crc = 0xFFFFFFFF;
for( ; len > 0; len--, buf++ )
crc = crc_tbl_osdep[(crc ^ *buf) & 0xFF] ^ ( crc >> 8 );
return( ~crc );
}
/* CRC checksum verification routine */
int check_crc_buf_osdep( unsigned char *buf, int len )
{
unsigned long crc;
if (len<0)
return 0;
crc = calc_crc_osdep(buf, len);
buf+=len;
return( ( ( crc ) & 0xFF ) == buf[0] &&
( ( crc >> 8 ) & 0xFF ) == buf[1] &&
( ( crc >> 16 ) & 0xFF ) == buf[2] &&
( ( crc >> 24 ) & 0xFF ) == buf[3] );
}
//Check if the driver is ndiswrapper */
static int is_ndiswrapper(const char * iface, const char * path)
{
int n, pid, unused;
if ((pid=fork())==0)
{
close( 0 ); close( 1 ); close( 2 ); unused = chdir( "/" );
execl(path, "iwpriv",iface, "ndis_reset", NULL);
exit( 1 );
}
waitpid( pid, &n, 0 );
return ( ( WIFEXITED(n) && WEXITSTATUS(n) == 0 ));
}
/* Search a file recursively */
static char * searchInside(const char * dir, const char * filename)
{
char * ret;
char * curfile;
struct stat sb;
int len, lentot;
DIR *dp;
struct dirent *ep;
dp = opendir(dir);
if (dp == NULL)
{
return NULL;
}
len = strlen( filename );
lentot = strlen( dir ) + 256 + 2;
curfile = (char *) calloc( 1, lentot );
while ((ep = readdir(dp)) != NULL)
{
memset(curfile, 0, lentot);
sprintf(curfile, "%s/%s", dir, ep->d_name);
//Checking if it's the good file
if ((int)strlen( ep->d_name) == len && !strcmp(ep->d_name, filename))
{
(void)closedir(dp);
return curfile;
}
lstat(curfile, &sb);
//If it's a directory and not a link, try to go inside to search
if (S_ISDIR(sb.st_mode) && !S_ISLNK(sb.st_mode))
{
//Check if the directory isn't "." or ".."
if (strcmp(".", ep->d_name) && strcmp("..", ep->d_name))
{
//Recursive call
ret = searchInside(curfile, filename);
if (ret != NULL)
{
(void)closedir(dp);
free( curfile );
return ret;
}
}
}
}
(void)closedir(dp);
free( curfile );
return NULL;
}
/* Search a wireless tool and return its path */
static char * wiToolsPath(const char * tool)
{
char * path;
int i, nbelems;
static const char * paths [] = {
"/sbin",
"/usr/sbin",
"/usr/local/sbin",
"/bin",
"/usr/bin",
"/usr/local/bin",
"/tmp"
};
nbelems = sizeof(paths) / sizeof(char *);
for (i = 0; i < nbelems; i++)
{
path = searchInside(paths[i], tool);
if (path != NULL)
return path;
}
return NULL;
}
static int linux_get_channel(struct wif *wi)
{
struct priv_linux *dev = wi_priv(wi);
struct iwreq wrq;
int fd, frequency;
int chan=0;
memset( &wrq, 0, sizeof( struct iwreq ) );
if(dev->main_if)
strncpy( wrq.ifr_name, dev->main_if, IFNAMSIZ );
else
strncpy( wrq.ifr_name, wi_get_ifname(wi), IFNAMSIZ );
fd = dev->fd_in;
if(dev->drivertype == DT_IPW2200)
fd = dev->fd_main;
if( ioctl( fd, SIOCGIWFREQ, &wrq ) < 0 )
return( -1 );
frequency = wrq.u.freq.m;
if (frequency > 100000000)
frequency/=100000;
else if (frequency > 1000000)
frequency/=1000;
if (frequency > 1000)
chan = getChannelFromFrequency(frequency);
else chan = frequency;
return chan;
}
static int linux_get_freq(struct wif *wi)
{
struct priv_linux *dev = wi_priv(wi);
struct iwreq wrq;
int fd, frequency;
memset( &wrq, 0, sizeof( struct iwreq ) );
if(dev->main_if)
strncpy( wrq.ifr_name, dev->main_if, IFNAMSIZ );
else
strncpy( wrq.ifr_name, wi_get_ifname(wi), IFNAMSIZ );
fd = dev->fd_in;
if(dev->drivertype == DT_IPW2200)
fd = dev->fd_main;
if( ioctl( fd, SIOCGIWFREQ, &wrq ) < 0 )
return( -1 );
frequency = wrq.u.freq.m;
if (frequency > 100000000)
frequency/=100000;
else if (frequency > 1000000)
frequency/=1000;
if (frequency < 500) //its not a freq, but the actual channel
frequency = getFrequencyFromChannel(frequency);
return frequency;
}
static int linux_set_rate(struct wif *wi, int rate)
{
struct priv_linux *dev = wi_priv(wi);
struct ifreq ifr;
struct iwreq wrq;
char s[32];
int pid, status, unused;
memset(s, 0, sizeof(s));
switch(dev->drivertype) {
case DT_MADWIFING:
memset( &ifr, 0, sizeof( ifr ) );
strncpy( ifr.ifr_name, wi_get_ifname(wi), sizeof( ifr.ifr_name ) - 1 );
if( ioctl( dev->fd_in, SIOCGIFINDEX, &ifr ) < 0 )
{
printf("Interface %s: \n", wi_get_ifname(wi));
perror( "ioctl(SIOCGIFINDEX) failed" );
return( 1 );
}
/* Bring interface down*/
ifr.ifr_flags = 0;
if( ioctl( dev->fd_in, SIOCSIFFLAGS, &ifr ) < 0 )
{
perror( "ioctl(SIOCSIFFLAGS) failed" );
return( 1 );
}
usleep(100000);
snprintf( s, sizeof( s ) - 1, "%.1fM", (rate/1000000.0) );
if( ( pid = fork() ) == 0 )
{
close( 0 ); close( 1 ); close( 2 ); unused = chdir( "/" );
execlp(dev->iwconfig, "iwconfig", wi_get_ifname(wi),
"rate", s, NULL );
exit( 1 );
}
waitpid( pid, &status, 0 );
return 0;
break;
case DT_MAC80211_RT:
dev->rate = (rate/500000);
return 0;
break;
default:
break;
}
/* ELSE */
memset( &wrq, 0, sizeof( struct iwreq ) );
if(dev->main_if)
strncpy( wrq.ifr_name, dev->main_if, IFNAMSIZ );
else
strncpy( wrq.ifr_name, wi_get_ifname(wi), IFNAMSIZ );
wrq.u.bitrate.value = rate;
if( ioctl( dev->fd_in, SIOCSIWRATE, &wrq ) < 0 )
{
return( -1 );
}
return 0;
}
static int linux_get_rate(struct wif *wi)
{
struct priv_linux *dev = wi_priv(wi);
struct iwreq wrq;
memset( &wrq, 0, sizeof( struct iwreq ) );
if( dev->drivertype == DT_MAC80211_RT )
return (dev->rate*500000);
if(dev->main_if)
strncpy( wrq.ifr_name, dev->main_if, IFNAMSIZ );
else
strncpy( wrq.ifr_name, wi_get_ifname(wi), IFNAMSIZ );
if( ioctl( dev->fd_in, SIOCGIWRATE, &wrq ) < 0 )
{
return( -1 );
}
return wrq.u.bitrate.value;
}
static int linux_set_mtu(struct wif *wi, int mtu)
{
struct priv_linux *dev = wi_priv(wi);
struct ifreq ifr;
memset( &ifr, 0, sizeof( struct ifreq ) );
if(dev->main_if)
strncpy( ifr.ifr_name, dev->main_if, sizeof( ifr.ifr_name ) - 1 );
else
strncpy( ifr.ifr_name, wi_get_ifname(wi), sizeof( ifr.ifr_name ) - 1 );
ifr.ifr_mtu = mtu;
if( ioctl( dev->fd_in, SIOCSIFMTU, &ifr ) < 0 )
{
return( -1 );
}
return 0;
}
static int linux_get_mtu(struct wif *wi)
{
struct priv_linux *dev = wi_priv(wi);
struct ifreq ifr;
memset( &ifr, 0, sizeof( struct ifreq ) );
if(dev->main_if)
strncpy( ifr.ifr_name, dev->main_if, sizeof( ifr.ifr_name ) - 1 );
else
strncpy( ifr.ifr_name, wi_get_ifname(wi), sizeof( ifr.ifr_name ) - 1 );
if( ioctl( dev->fd_in, SIOCGIFMTU, &ifr ) < 0 )
{
return( -1 );
}
return ifr.ifr_mtu;
}
static int linux_read(struct wif *wi, unsigned char *buf, int count,
struct rx_info *ri)
{
struct priv_linux *dev = wi_priv(wi);
unsigned char tmpbuf[4096];
int caplen, n, got_signal, got_noise, got_channel, fcs_removed;
caplen = n = got_signal = got_noise = got_channel = fcs_removed = 0;
if((unsigned)count > sizeof(tmpbuf))
return( -1 );
if( ( caplen = read( dev->fd_in, tmpbuf, count ) ) < 0 )
{
if( errno == EAGAIN )
return( 0 );
perror( "read failed" );
return( -1 );
}
switch (dev->drivertype) {
case DT_MADWIFI:
caplen -= 4; /* remove the FCS for madwifi-old! only (not -ng)*/
break;
default:
break;
}
memset( buf, 0, count);
/* XXX */
if (ri)
memset(ri, 0, sizeof(*ri));
if( dev->arptype_in == ARPHRD_IEEE80211_PRISM )
{
/* skip the prism header */
if( tmpbuf[7] == 0x40 )
{
/* prism54 uses a different format */
if(ri)
{
ri->ri_power = tmpbuf[0x33];
ri->ri_noise = *(unsigned int *)( tmpbuf + 0x33 + 12 );
ri->ri_rate = (*(unsigned int *)( tmpbuf + 0x33 + 24 ))*500000;
got_signal = 1;
got_noise = 1;
}
n = 0x40;
}
else
{
if(ri)
{
ri->ri_mactime = *(u_int64_t*)( tmpbuf + 0x5C - 48 );
ri->ri_channel = *(unsigned int *)( tmpbuf + 0x5C - 36 );
ri->ri_power = *(unsigned int *)( tmpbuf + 0x5C );
ri->ri_noise = *(unsigned int *)( tmpbuf + 0x5C + 12 );
ri->ri_rate = (*(unsigned int *)( tmpbuf + 0x5C + 24 ))*500000;
// if( ! memcmp( iface[i], "ath", 3 ) )
if( dev->drivertype == DT_MADWIFI )
ri->ri_power -= *(int *)( tmpbuf + 0x68 );
if( dev->drivertype == DT_MADWIFING )
ri->ri_power -= *(int *)( tmpbuf + 0x68 );
got_channel = 1;
got_signal = 1;
got_noise = 1;
}
n = *(int *)( tmpbuf + 4 );
}
if( n < 8 || n >= caplen )
return( 0 );
}
if( dev->arptype_in == ARPHRD_IEEE80211_FULL )
{
struct ieee80211_radiotap_iterator iterator;
struct ieee80211_radiotap_header *rthdr;
rthdr = (struct ieee80211_radiotap_header *) tmpbuf;
if (ieee80211_radiotap_iterator_init(&iterator, rthdr, caplen) < 0)
return (0);
/* go through the radiotap arguments we have been given
* by the driver
*/
while (ri && (ieee80211_radiotap_iterator_next(&iterator) >= 0)) {
switch (iterator.this_arg_index) {
case IEEE80211_RADIOTAP_TSFT:
ri->ri_mactime = le64_to_cpu(*((uint64_t*)iterator.this_arg));
break;
case IEEE80211_RADIOTAP_DBM_ANTSIGNAL:
if(!got_signal) {
if( *iterator.this_arg < 127 )
ri->ri_power = *iterator.this_arg;
else
ri->ri_power = *iterator.this_arg - 255;
got_signal = 1;
}
break;
case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
if(!got_signal) {
if( *iterator.this_arg < 127 )
ri->ri_power = *iterator.this_arg;
else
ri->ri_power = *iterator.this_arg - 255;
got_signal = 1;
}
break;
case IEEE80211_RADIOTAP_DBM_ANTNOISE:
if(!got_noise) {
if( *iterator.this_arg < 127 )
ri->ri_noise = *iterator.this_arg;
else
ri->ri_noise = *iterator.this_arg - 255;
got_noise = 1;
}
break;
case IEEE80211_RADIOTAP_DB_ANTNOISE:
if(!got_noise) {
if( *iterator.this_arg < 127 )
ri->ri_noise = *iterator.this_arg;
else
ri->ri_noise = *iterator.this_arg - 255;
got_noise = 1;
}
break;
case IEEE80211_RADIOTAP_ANTENNA:
ri->ri_antenna = *iterator.this_arg;
break;
case IEEE80211_RADIOTAP_CHANNEL:
ri->ri_channel = *iterator.this_arg;
got_channel = 1;
break;
case IEEE80211_RADIOTAP_RATE:
ri->ri_rate = (*iterator.this_arg) * 500000;
break;
case IEEE80211_RADIOTAP_FLAGS:
/* is the CRC visible at the end?
* remove
*/
if ( *iterator.this_arg &
IEEE80211_RADIOTAP_F_FCS )
{
fcs_removed = 1;
caplen -= 4;
}
if ( *iterator.this_arg &
IEEE80211_RADIOTAP_F_RX_BADFCS )
return( 0 );
break;
}
}
n = le16_to_cpu(rthdr->it_len);
if( n <= 0 || n >= caplen )
return( 0 );
}
caplen -= n;
//detect fcs at the end, even if the flag wasn't set and remove it
if( fcs_removed == 0 && check_crc_buf_osdep( tmpbuf+n, caplen - 4 ) == 1 )
{
caplen -= 4;
}
memcpy( buf, tmpbuf + n, caplen );
if(ri && !got_channel)
ri->ri_channel = wi_get_channel(wi);
return( caplen );
}
static int linux_write(struct wif *wi, unsigned char *buf, int count,
struct tx_info *ti)
{
struct priv_linux *dev = wi_priv(wi);
unsigned char maddr[6];
int ret, usedrtap=0;
unsigned char tmpbuf[4096];
unsigned char rate;
unsigned short int *p_rtlen;
unsigned char u8aRadiotap[] = {
0x00, 0x00, // <-- radiotap version
0x0c, 0x00, // <- radiotap header length
0x04, 0x80, 0x00, 0x00, // <-- bitmap
0x00, // <-- rate
0x00, // <-- padding for natural alignment
0x18, 0x00, // <-- TX flags
};
/* Pointer to the radiotap header length field for later use. */
p_rtlen = (unsigned short int*)(u8aRadiotap+2);
if((unsigned) count > sizeof(tmpbuf)-22) return -1;
/* XXX honor ti */
if (ti) {}
rate = dev->rate;
u8aRadiotap[8] = rate;
switch (dev->drivertype) {
case DT_MAC80211_RT:
memcpy(tmpbuf, u8aRadiotap, sizeof (u8aRadiotap) );
memcpy(tmpbuf + sizeof (u8aRadiotap), buf, count);
count += sizeof (u8aRadiotap);
buf = tmpbuf;
usedrtap = 1;
break;
case DT_WLANNG:
/* Wlan-ng isn't able to inject on kernel > 2.6.11 */
if( dev->inject_wlanng == 0 )
{
perror( "write failed" );
return( -1 );
}
if (count >= 24)
{
/* for some reason, wlan-ng requires a special header */
if( ( ((unsigned char *) buf)[1] & 3 ) != 3 )
{
memcpy( tmpbuf, buf, 24 );
memset( tmpbuf + 24, 0, 22 );
tmpbuf[30] = ( count - 24 ) & 0xFF;
tmpbuf[31] = ( count - 24 ) >> 8;
memcpy( tmpbuf + 46, buf + 24, count - 24 );
count += 22;
}
else
{
memcpy( tmpbuf, buf, 30 );
memset( tmpbuf + 30, 0, 16 );
tmpbuf[30] = ( count - 30 ) & 0xFF;
tmpbuf[31] = ( count - 30 ) >> 8;
memcpy( tmpbuf + 46, buf + 30, count - 30 );
count += 16;
}
buf = tmpbuf;
}
/* fall thru */
case DT_HOSTAP:
if( ( ((uchar *) buf)[1] & 3 ) == 2 )
{
/* Prism2 firmware swaps the dmac and smac in FromDS packets */
memcpy( maddr, buf + 4, 6 );
memcpy( buf + 4, buf + 16, 6 );
memcpy( buf + 16, maddr, 6 );
}
break;
default:
break;
}
ret = write( dev->fd_out, buf, count );
if( ret < 0 )
{
if( errno == EAGAIN || errno == EWOULDBLOCK ||
errno == ENOBUFS || errno == ENOMEM )
{
usleep( 10000 );
return( 0 );
}
perror( "write failed" );
return( -1 );
}
/* radiotap header length is stored little endian on all systems */
if(usedrtap)
ret-=letoh16(*p_rtlen);
if( ret < 0 )
{
if( errno == EAGAIN || errno == EWOULDBLOCK ||
errno == ENOBUFS || errno == ENOMEM )
{
usleep( 10000 );
return( 0 );
}
perror( "write failed" );
return( -1 );
}
return( ret );
}
static int linux_set_channel(struct wif *wi, int channel)
{
struct priv_linux *dev = wi_priv(wi);
char s[64];
int pid, status, unused;
struct iwreq wrq;
memset( s, 0, sizeof( s ) );
switch (dev->drivertype) {
case DT_WLANNG:
snprintf( s, sizeof( s ) - 1, "channel=%d", channel );
if( ( pid = fork() ) == 0 )
{
close( 0 ); close( 1 ); close( 2 ); unused = chdir( "/" );
execl( dev->wlanctlng, "wlanctl-ng", wi_get_ifname(wi),
"lnxreq_wlansniff", s, NULL );
exit( 1 );
}
waitpid( pid, &status, 0 );
if( WIFEXITED(status) )
{
dev->channel=channel;
return( WEXITSTATUS(status) );
}
else
return( 1 );
break;
case DT_ORINOCO:
snprintf( s, sizeof( s ) - 1, "%d", channel );
if( ( pid = fork() ) == 0 )
{
close( 0 ); close( 1 ); close( 2 ); unused = chdir( "/" );
execlp( dev->iwpriv, "iwpriv", wi_get_ifname(wi),
"monitor", "1", s, NULL );
exit( 1 );
}
waitpid( pid, &status, 0 );
dev->channel = channel;
return 0;
break; //yeah ;)
case DT_ZD1211RW:
snprintf( s, sizeof( s ) - 1, "%d", channel );
if( ( pid = fork() ) == 0 )
{
close( 0 ); close( 1 ); close( 2 ); unused = chdir( "/" );
execlp(dev->iwconfig, "iwconfig", wi_get_ifname(wi),
"channel", s, NULL );
exit( 1 );
}
waitpid( pid, &status, 0 );
dev->channel = channel;
return 0;
break; //yeah ;)
case DT_MAC80211_RT:
snprintf(s, sizeof(s) - 1, "iw %s set channel %d", wi_get_ifname(wi), channel);
printf("exec cmd: %s\n", s);
if(system(s) == 0)
dev->channel = channel;
else
printf("cannot set channel to %d\n", channel);
return 0;
break; //yeah ;)
default:
break;
}
memset( &wrq, 0, sizeof( struct iwreq ) );
strncpy( wrq.ifr_name, wi_get_ifname(wi), IFNAMSIZ );
wrq.u.freq.m = (double) channel;
wrq.u.freq.e = (double) 0;
if( ioctl( dev->fd_in, SIOCSIWFREQ, &wrq ) < 0 )
{
usleep( 10000 ); /* madwifi needs a second chance */
if( ioctl( dev->fd_in, SIOCSIWFREQ, &wrq ) < 0 )
{
perror( "ioctl(SIOCSIWFREQ) failed" );
return( 1 );
}
}
dev->channel = channel;
return( 0 );
}
static int linux_set_freq(struct wif *wi, int freq)
{
struct priv_linux *dev = wi_priv(wi);
char s[64];
int pid, status, unused;
struct iwreq wrq;
memset( s, 0, sizeof( s ) );
switch (dev->drivertype) {
case DT_WLANNG:
case DT_ORINOCO:
case DT_ZD1211RW:
snprintf( s, sizeof( s ) - 1, "%dM", freq );
if( ( pid = fork() ) == 0 )
{
close( 0 ); close( 1 ); close( 2 ); unused = chdir( "/" );
execlp(dev->iwconfig, "iwconfig", wi_get_ifname(wi),
"freq", s, NULL );
exit( 1 );
}
waitpid( pid, &status, 0 );
dev->freq = freq;
return 0;
break; //yeah ;)
case DT_MAC80211_RT:
snprintf( s, sizeof( s ) - 1, "iw %s set freq %d", wi_get_ifname(wi), freq );
if(system(s) == 0 )
dev->freq = freq;
return 0;
break; //yeah ;)
default:
break;
}
memset( &wrq, 0, sizeof( struct iwreq ) );
strncpy( wrq.ifr_name, wi_get_ifname(wi), IFNAMSIZ );
wrq.u.freq.m = (double) freq*100000;
wrq.u.freq.e = (double) 1;
if( ioctl( dev->fd_in, SIOCSIWFREQ, &wrq ) < 0 )
{
usleep( 10000 ); /* madwifi needs a second chance */
if( ioctl( dev->fd_in, SIOCSIWFREQ, &wrq ) < 0 )
{
/* perror( "ioctl(SIOCSIWFREQ) failed" ); */
return( 1 );
}
}
dev->freq = freq;
return( 0 );
}
static int opensysfs(struct priv_linux *dev, char *iface, int fd) {
int fd2;
char buf[256];
/* ipw2200 injection */
snprintf(buf, 256, "/sys/class/net/%s/device/inject", iface);
fd2 = open(buf, O_WRONLY);
/* bcm43xx injection */
if (fd2 == -1)
snprintf(buf, 256, "/sys/class/net/%s/device/inject_nofcs", iface);
fd2 = open(buf, O_WRONLY);
if (fd2 == -1)
return -1;
dup2(fd2, fd);
close(fd2);
dev->sysfs_inject=1;
return 0;
}
int linux_get_monitor(struct wif *wi)
{
struct priv_linux *dev = wi_priv(wi);
struct ifreq ifr;
struct iwreq wrq;
/* find the interface index */
if(dev->drivertype == DT_IPW2200)
return( 0 );
memset( &ifr, 0, sizeof( ifr ) );
strncpy( ifr.ifr_name, wi_get_ifname(wi), sizeof( ifr.ifr_name ) - 1 );