atmos/wifi-curse
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add iw_can_change_channel, fix a bug in channel changing

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This commit is contained in:
oblique 2012-03-02 23:07:23 +02:00
parent 54d4e1d66f
commit 9b7d18fa21
3 changed files with 35 additions and 5 deletions
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4
README
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@ -8,10 +8,10 @@ purposes only. It works only in Linux and requires wireless card
drivers capable of injecting packets in wireless networks.
If your Linux kernel is version 2.6.35 or above, you have to
apply the patch patches/cfg80211_monitor_mode_channel_-1_fix.patch
apply the patch patches/cfg80211_monitor_mode_channel_fix.patch
to the kernel.
How to use it: Just run it as root and put as first argument the
card interface. It will put your interface in monitor mode automatically,
it will start DoSing and change channel every 3 seconds. The channel
range is 1 - 13.
range is 1 - 13.

0
patches/cfg80211_monitor_mode_channel_-1_fix.patch → patches/cfg80211_monitor_mode_channel_fix.patch
View File

36
wificurse.c
View File

@ -176,6 +176,25 @@ ssize_t iw_read(int fd, void *buf, size_t count, uint8_t **pkt, size_t *pkt_sz)
return r;
}
int iw_can_change_channel(struct dev *dev) {
struct iwreq iwr;
ssize_t ret;
/* set channel */
memset(&iwr, 0, sizeof(iwr));
strncpy(iwr.ifr_name, dev->ifname, sizeof(iwr.ifr_name)-1);
iwr.u.freq.flags = IW_FREQ_FIXED;
iwr.u.freq.m = 1;
if (ioctl(dev->fd, SIOCSIWFREQ, &iwr) < 0)
return 0;
if (ioctl(dev->fd, SIOCGIWFREQ, &iwr) < 0)
return 0;
/* channel 1 frequency is 2412 */
return iwr.u.freq.m == 2412;
}
int iw_set_channel(struct dev *dev, int chan) {
struct iwreq iwr;
ssize_t ret;
@ -311,6 +330,13 @@ int main(int argc, char *argv[]) {
goto _errout;
}
if (!iw_can_change_channel(&dev)) {
fprintf(stderr, "%s cannot change channels in monitor mode.\n"
"Maybe you will need to patch your kernel with:\n"
" patches/cfg80211_monitor_mode_channel_fix.patch\n", dev.ifname);
goto _errout;
}
pfd[1].fd = dev.fd;
pfd[1].revents = 0;
pfd[1].events = POLLIN;
@ -351,15 +377,19 @@ int main(int argc, char *argv[]) {
/* change channel every 3 seconds */
if (time(NULL) - tm1 >= 3) {
chan = (chan % 13) + 1;
if (iw_set_channel(&dev, chan) < 0) {
int n = 0;
do {
chan = (chan % 13) + 1;
ret = iw_set_channel(&dev, chan);
/* if fails try next channel */
} while(++n < 13 && ret < 0);
if (ret < 0) {
print_error();
goto _errout;
}
printf("Channel: %d\n", dev.chan);
tm1 = time(NULL);
}
}
printf("\nExiting..\n");