patch and iw_can_change_channel are unneeded, so they are removed

README

@@ -7,10 +7,6 @@ is essencially a WiFi DoS attack tool created for educational
 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_fix.patch
-to the kernel.
-
 How to use it: Just run it as root and put as first argument the
 card interface. It will automatically put your interface in monitor
 mode and it will listen at channel range 1-14. If there is no AP in the

patches/cfg80211_monitor_mode_channel_fix.patch

@@ -1,14 +0,0 @@
-diff --git a/net/wireless/chan.c b/net/wireless/chan.c
-index 2fcfe09..3f63fae 100644
---- a/net/wireless/chan.c
-+++ b/net/wireless/chan.c
-@@ -85,9 +85,6 @@ int cfg80211_set_freq(struct cfg80211_registered_device *rdev,
- 	struct ieee80211_channel *chan;
- 	int result;
- 
--	if (wdev && wdev->iftype == NL80211_IFTYPE_MONITOR)
--		wdev = NULL;
--
- 	if (wdev) {
- 		ASSERT_WDEV_LOCK(wdev);
- 

src/iw.c

@@ -199,24 +199,6 @@ ssize_t iw_read(struct iw_dev *dev, void *buf, size_t count, uint8_t **pkt, size
 	return r;
 }
 
-int iw_can_change_channel(struct iw_dev *dev) {
-	struct iwreq iwr;
-
-	/* 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_in, SIOCSIWFREQ, &iwr) < 0)
-		return 0;
-	if (ioctl(dev->fd_in, SIOCGIWFREQ, &iwr) < 0)
-		return 0;
-
-	/* channel 1 frequency is 2412 */
-	return iwr.u.freq.m == 2412;
-}
-
 int iw_set_channel(struct iw_dev *dev, int chan) {
 	struct iwreq iwr;
 	ssize_t ret;

src/iw.h

@@ -58,7 +58,6 @@ int iw_open(struct iw_dev *dev);
 void iw_close(struct iw_dev *dev);
 ssize_t iw_write(struct iw_dev *dev, void *buf, size_t count);
 ssize_t iw_read(struct iw_dev *dev, void *buf, size_t count, uint8_t **pkt, size_t *pkt_sz);
-int iw_can_change_channel(struct iw_dev *dev);
 int iw_set_channel(struct iw_dev *dev, int chan);
 
 #endif

src/wificurse.c

@@ -253,13 +253,6 @@ int main(int argc, char *argv[]) {
 		goto _errout_no_thread;
 	}
 
-	if (!iw_can_change_channel(&dev)) {
-		fprintf(stderr, "%s can not change channels in monitor mode.\n"
-			"Maybe you need to patch your kernel with:\n"
-			"  patches/cfg80211_monitor_mode_channel_fix.patch\n", dev.ifname);
-		goto _errout_no_thread;
-	}
-
 	pfd[1].fd = dev.fd_in;
 	pfd[1].revents = 0;
 	pfd[1].events = POLLIN;