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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import unittest, tempfile, struct
import pure_pcapy
class OpenerTest(unittest.TestCase):
def test_open_nonexistant(self):
self.assertRaises(pure_pcapy.PcapError, pure_pcapy.open_offline, 'hufioewhauiefhshcuidhuighureiahufiesa')
def test_open_directory(self):
self.assertRaises(pure_pcapy.PcapError, pure_pcapy.open_offline, './')
def test_open_good_file(self):
import os
input_filename = tempfile.mktemp()
f = open(input_filename, "wb")
f.write(struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1))
f.close()
reader = pure_pcapy.open_offline(input_filename)
self.assertTrue(isinstance(reader, pure_pcapy.Reader))
os.unlink(input_filename)
class FixupTest(unittest.TestCase):
def test_fixup_short(self):
self.assertEqual(0x3412, pure_pcapy.fixup_swapped_short(0x1234))
def test_fixup_long(self):
self.assertEqual(0x78563412, pure_pcapy.fixup_swapped_long(0x12345678))
def create_pcap_file(parts):
input = tempfile.TemporaryFile()
for part in parts:
input.write(part)
input.seek(0)
return input
class ReaderHeaderTest(unittest.TestCase):
def test_open_short(self):
input = tempfile.TemporaryFile()
try:
pure_pcapy.Reader(input)
self.fail("exception not thrown")
except pure_pcapy.PcapError as e:
self.assertEqual("truncated dump file; tried to read 24 file header bytes, only got 0", e.args[0])
def test_open_header_bad(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0x11111111, 2, 4, 0, 0, 65535, 1)
])
try:
pure_pcapy.Reader(input)
self.fail("exception not thrown")
except pure_pcapy.PcapError as e:
self.assertEqual("bad dump file format", e.args[0])
def test_open_header_bigendian(self):
input = create_pcap_file([
struct.pack(">IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1)
])
reader = pure_pcapy.Reader(input)
self.assertEqual(2, reader.version_major)
self.assertEqual(4, reader.version_minor)
def test_open_header_littleendian(self):
input = create_pcap_file([
struct.pack("<IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1)
])
reader = pure_pcapy.Reader(input)
self.assertEqual(2, reader.version_major)
self.assertEqual(4, reader.version_minor)
def test_datalink(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1234)
])
reader = pure_pcapy.Reader(input)
self.assertEqual(1234, reader.datalink())
def test_getnonblock(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1234)
])
reader = pure_pcapy.Reader(input)
self.assertEqual(0, reader.getnonblock())
class ReaderPacketTest(unittest.TestCase):
def test_read_empty(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
])
reader = pure_pcapy.Reader(input)
res = reader.next()
self.assertEqual((None, ''), res)
def test_read_half_header(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
struct.pack("II", 10, 20),
])
reader = pure_pcapy.Reader(input)
try:
res = reader.next()
self.fail("exception not thrown")
except pure_pcapy.PcapError as e:
self.assertEqual("truncated dump file; tried to read 16 header bytes, only got 8", e.args[0])
def test_read_half_data(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
struct.pack("IIII", 10, 20, 4, 4),
b"aa"
])
reader = pure_pcapy.Reader(input)
try:
res = reader.next()
self.fail("exception not thrown")
except pure_pcapy.PcapError as e:
self.assertEqual("truncated dump file; tried to read 4 captured bytes, only got 2", e.args[0])
def test_read_packet(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
struct.pack("IIII", 10, 20, 30, 40),
b"x" * 30
])
reader = pure_pcapy.Reader(input)
res = reader.next()
self.assertEqual(tuple, type(res))
self.assertEqual(2, len(res))
self.assertTrue(isinstance(res[0], pure_pcapy.Pkthdr))
self.assertEqual(bytes, type(res[1]))
self.assertEqual(b"x"*30, res[1])
def test_read_2_packets(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
struct.pack("IIII", 10, 20, 30, 40),
b"a" * 30,
struct.pack("IIII", 11, 20, 30, 40),
b"b" * 30,
])
reader = pure_pcapy.Reader(input)
res = reader.next()
self.assertEqual(b"a"*30, res[1])
res = reader.next()
self.assertEqual(b"b"*30, res[1])
class ReaderLoopingTest(unittest.TestCase):
def packet_counter(self, cnt):
def callback(hdr, data):
cnt[0]+=1
self.assertEqual(cnt[0], hdr.getcaplen())
self.assertEqual(cnt[0], len(data))
return callback
def test_dispatch_no_packets(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
])
cnt = [0]
reader = pure_pcapy.Reader(input)
res = reader.dispatch(-1, self.packet_counter(cnt))
self.assertEqual(0, cnt[0])
self.assertEqual(0, res)
res = reader.dispatch(0, self.packet_counter(cnt))
self.assertEqual(0, cnt[0])
self.assertEqual(0, res)
def test_loop_no_packets(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
])
cnt = [0]
reader = pure_pcapy.Reader(input)
res = reader.loop(0, self.packet_counter(cnt))
self.assertEqual(0, cnt[0])
self.assertEqual(None, res)
res = reader.loop(0, self.packet_counter(cnt))
self.assertEqual(0, cnt[0])
self.assertEqual(None, res)
def test_dispatch_1_packet_read_all(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
struct.pack("IIII", 10, 20, 1, 1),
b"a",
])
cnt = [0]
reader = pure_pcapy.Reader(input)
res = reader.dispatch(-1, self.packet_counter(cnt))
self.assertEqual(1, cnt[0])
self.assertEqual(0, res)
def test_loop_1_packet_read_all(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
struct.pack("IIII", 10, 20, 1, 1),
b"a",
])
cnt = [0]
reader = pure_pcapy.Reader(input)
res = reader.loop(-1, self.packet_counter(cnt))
self.assertEqual(1, cnt[0])
self.assertEqual(None, res)
def test_dispatch_1_packet_read_1(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
struct.pack("IIII", 10, 20, 1, 1),
b"a",
])
cnt = [0]
reader = pure_pcapy.Reader(input)
res = reader.dispatch(1, self.packet_counter(cnt))
self.assertEqual(1, cnt[0])
self.assertEqual(1, res)
def test_loop_1_packet_read_1(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
struct.pack("IIII", 10, 20, 1, 1),
b"a",
])
cnt = [0]
reader = pure_pcapy.Reader(input)
res = reader.loop(1, self.packet_counter(cnt))
self.assertEqual(1, cnt[0])
self.assertEqual(None, res)
def test_dispatch_2_packet_read_1(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
struct.pack("IIII", 10, 20, 1, 1),
b"a",
struct.pack("IIII", 10, 20, 2, 2),
b"aa",
])
cnt = [0]
reader = pure_pcapy.Reader(input)
res = reader.dispatch(1, self.packet_counter(cnt))
self.assertEqual(cnt[0], 1)
self.assertEqual(res, 1)
def test_loop_2_packet_read_1(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
struct.pack("IIII", 10, 20, 1, 1),
b"a",
struct.pack("IIII", 10, 20, 2, 2),
b"aa",
])
cnt = [0]
reader = pure_pcapy.Reader(input)
res = reader.loop(1, self.packet_counter(cnt))
self.assertEqual(cnt[0], 1)
self.assertEqual(res, None)
class PkthdrTest(unittest.TestCase):
def test_hdr_fields(self):
input = create_pcap_file([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
struct.pack("IIII", 10, 20, 30, 40),
b"x" * 30
])
reader = pure_pcapy.Reader(input)
hdr, data = reader.next()
self.assertEqual((10, 20), hdr.getts())
self.assertEqual(30, hdr.getcaplen())
self.assertEqual(40, hdr.getlen())
class DumperTest(unittest.TestCase):
def test_replicate(self):
import os
original = b''.join([
struct.pack("IHHIIII", 0xa1b2c3d4, 2, 4, 0, 0, 65535, 1),
struct.pack("IIII", 10, 20, 30, 40),
b"x" * 30])
input = tempfile.TemporaryFile()
input.write(original)
input.seek(0)
output_fd, output_filename = tempfile.mkstemp()
reader = pure_pcapy.Reader(input)
dumper = reader.dump_open(output_filename)
dumper.dump(*reader.next())
os.close(output_fd)
verify = open(output_filename, "rb")
replica = verify.read()
os.unlink(output_filename)
self.assertEqual(original, replica)
if __name__ == "__main__":
unittest.main()
|
