test/linux.uts

% Regression tests for Linux only

# More informations at http://www.secdev.org/projects/UTscapy/


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+ Linux only test

= TCP client automaton
~ automaton netaccess linux needs_root
* This test retries on failure because it often fails

from __future__ import print_function
import os
import time
import signal

from scapy.modules.six.moves import range

def handler(signum, stack_frame):
    raise Exception("Timer expired !")

tmp = signal.signal(signal.SIGALRM, handler)

SECDEV_IP4 = "203.178.141.194"
IPTABLE_RULE = "iptables -%c INPUT -s %s -p tcp --sport 80 -j DROP"

# Drop packets from SECDEV_IP4
assert(os.system(IPTABLE_RULE % ('A', SECDEV_IP4)) == 0)

success = False
for i in range(10):
    tmp = signal.alarm(5)
    try:
        r, w = os.pipe()
        t = TCP_client(SECDEV_IP4, 80, external_fd={ "tcp": (r,w) })
        tmp = os.write(w, b"HEAD / HTTP/1.0\r\n\r\n")
        t.runbg()
        time.sleep(0.5)
        response = os.read(r, 4096)
        tmp = signal.alarm(0)  # cancel the alarm
        t.stop()
        os.close(r)
        os.close(w)
        if response.startswith(b"HTTP/1.1 200 OK"):
            success = True
            break
        else:
            time.sleep(0.5)
    except Exception as e:
        print(e)

# Remove the iptables rule
assert(os.system(IPTABLE_RULE % ('D', SECDEV_IP4)) == 0)

assert(success)

= L3RawSocket
~ netaccess IP ICMP linux needs_root

old_l3socket = conf.L3socket
old_debug_dissector = conf.debug_dissector
conf.debug_dissector = False
conf.L3socket = L3RawSocket
x = sr1(IP(dst="www.google.com")/ICMP(),timeout=3)
conf.debug_dissector = old_debug_dissector
conf.L3socket = old_l3socket
x
assert x[IP].ottl() in [32, 64, 128, 255]
assert 0 <= x[IP].hops() <= 126
x is not None and ICMP in x and x[ICMP].type == 0

# TODO: fix this test (randomly stuck)
# ex: https://travis-ci.org/secdev/scapy/jobs/247473497

#= Supersocket _flush_fd
#~ needs_root linux
#
#import select
#
#from scapy.arch.linux import _flush_fd
#socket = conf.L2listen()
#select.select([socket],[],[],2)
#_flush_fd(socket.ins)

= Test legacy attach_filter function
~ linux needs_root
from scapy.arch.common import get_bpf_pointer

old_pypy = conf.use_pypy
conf.use_pypy = True

tcpdump_lines = ['12\n', '40 0 0 12\n', '21 0 5 34525\n', '48 0 0 20\n', '21 6 0 6\n', '21 0 6 44\n', '48 0 0 54\n', '21 3 4 6\n', '21 0 3 2048\n', '48 0 0 23\n', '21 0 1 6\n', '6 0 0 1600\n', '6 0 0 0\n']
pointer = get_bpf_pointer(tcpdump_lines)
assert six.PY3 or isinstance(pointer, str)
assert six.PY3 or len(pointer) > 1

conf.use_pypy = old_pypy

= Interface aliases & sub-interfaces
~ linux needs_root

import os
exit_status = os.system("ip link add name scapy0 type dummy")
exit_status = os.system("ip addr add 192.0.2.1/24 dev scapy0")
exit_status = os.system("ip link set scapy0 up")
exit_status = os.system("ifconfig scapy0:0 inet 198.51.100.1/24 up")
exit_status = os.system("ip addr show scapy0")
print(get_if_list())
conf.route.resync()
print(conf.route.routes)
assert(conf.route.route("198.51.100.254") == ("scapy0", "198.51.100.1", "0.0.0.0"))
route_alias = (3325256704, 4294967040, "0.0.0.0", "scapy0", "198.51.100.1", 0)
assert(route_alias in conf.route.routes)
exit_status = os.system("ip link add link scapy0 name scapy0.42 type vlan id 42")
exit_status = os.system("ip addr add 203.0.113.42/24 dev scapy0.42")
exit_status = os.system("ip link set scapy0.42 up")
exit_status = os.system("ip route add 192.0.2.43/32 via 203.0.113.41")
print(get_if_list())
conf.route.resync()
print(conf.route.routes)
assert(conf.route.route("192.0.2.43") == ("scapy0.42", "203.0.113.42", "203.0.113.41"))
route_specific = (3221226027, 4294967295, "203.0.113.41", "scapy0.42", "203.0.113.42", 0)
assert(route_specific in conf.route.routes)
exit_status = os.system("ip link del name dev scapy0")