def test_pcap_write(self):
"""Test the underlying __compare__ functionality of the
packet. Two packets constructed from the same bytes should be
equal and two that are not should not be equal."""
from pcs.pcap import DLT_NULL
# Create a vanilla ping packet
ip = ipv4()
ip.version = 4
ip.hlen = 5
ip.tos = 0
ip.length = 64
ip.id = 1
ip.flags = 0
ip.offset = 0
ip.ttl = 64
ip.protocol = IPPROTO_ICMP
ip.src = inet_atol("127.0.0.1")
ip.dst = inet_atol("127.0.0.1")
icmp = icmpv4()
icmp.type = 8
icmp.code = 0
echo = icmpv4echo()
echo.id = 32767
echo.seq = 1
lo = localhost()
lo.type = 2
packet = Chain([lo, ip, icmp, echo])
outfile = PcapDumpConnector("pcaptest.dump", DLT_NULL)
outfile.write(packet.bytes)
outfile.close()
infile = PcapConnector("pcaptest.dump")
packet = infile.read()
ipnew = ipv4(packet[infile.dloff:len(packet)])
assert (ip != None)
assert (ipnew != None)
self.assertEqual(ip, ipnew, "packets should be equal but are not")
def test_pcap_write(self):
"""Test the underlying __compare__ functionality of the
packet. Two packets constructed from the same bytes should be
equal and two that are not should not be equal."""
from pcs.pcap import DLT_NULL
# Create a vanilla ping packet
ip = ipv4()
ip.version = 4
ip.hlen = 5
ip.tos = 0
ip.length = 64
ip.id = 1
ip.flags = 0
ip.offset = 0
ip.ttl = 64
ip.protocol = IPPROTO_ICMP
ip.src = inet_atol("127.0.0.1")
ip.dst = inet_atol("127.0.0.1")
icmp = icmpv4()
icmp.type = 8
icmp.code = 0
echo = icmpv4echo()
echo.id = 32767
echo.seq = 1
lo = localhost()
lo.type = 2
packet = Chain([lo, ip, icmp, echo])
outfile = PcapDumpConnector("pcaptest.dump", DLT_NULL)
outfile.write(packet.bytes)
outfile.close()
infile = PcapConnector("pcaptest.dump")
packet = infile.read()
ipnew = ipv4(packet[infile.dloff:len(packet)])
assert (ip != None)
assert (ipnew != None)
self.assertEqual(ip, ipnew, "packets should be equal but are not")
def main():
from pcs import PcapConnector, TimeoutError, LimitReachedError
from pcs.packets.ethernet import ethernet
from pcs.packets.ipv4 import ipv4
from pcs.packets.icmpv4 import icmpv4
from pcs.packets.icmpv4 import icmpv4echo
from pcs.packets.icmpv4 import ICMP_ECHO
#from pcs.packets.icmpv4 import ICMP_ECHOREPLY
fxp0 = PcapConnector("fxp0")
filter = ethernet() / ipv4() / icmpv4(type=ICMP_ECHO) / icmpv4echo()
#from pcs.bpf import program
#bp = fxp0.make_bpf_program(filter)
#for lp in bp.disassemble():
# print lp
#fxp0.setfilter('icmp')
#fxp0.set_bpf_program(bp)
print "Expecting at least 1 ICMP echo request within 10 seconds."
try:
fxp0.expect([filter], 10)
except LimitReachedError:
print "Limit reached."
sys.exit(1)
except TimeoutError:
print "Timed out."
sys.exit(1)
nmatches = 0
if fxp0.matches is not None:
nmatches = len(fxp0.matches)
print "Matched", nmatches, "chain(s)."
sys.exit(0)
def main():
from pcs import PcapConnector, TimeoutError, LimitReachedError
from pcs.packets.ethernet import ethernet
from pcs.packets.ipv4 import ipv4
from pcs.packets.icmpv4 import icmpv4
from pcs.packets.icmpv4 import icmpv4echo
from pcs.packets.icmpv4 import ICMP_ECHO
#from pcs.packets.icmpv4 import ICMP_ECHOREPLY
fxp0 = PcapConnector("fxp0")
filter = ethernet() / ipv4() / icmpv4(type=ICMP_ECHO) / icmpv4echo()
#from pcs.bpf import program
#bp = fxp0.make_bpf_program(filter)
#for lp in bp.disassemble():
# print lp
#fxp0.setfilter('icmp')
#fxp0.set_bpf_program(bp)
print "Expecting at least 1 ICMP echo request within 10 seconds."
try:
fxp0.expect([filter], 10)
except LimitReachedError:
print "Limit reached."
sys.exit(1)
except TimeoutError:
print "Timed out."
sys.exit(1)
nmatches = 0
if fxp0.matches is not None:
nmatches = len(fxp0.matches)
print "Matched", nmatches, "chain(s)."
sys.exit(0)
def test_pcap_live(self):
"""Test live injection and reception.
This test requires threads and must be run as root to succeed."""
import threading
e = ethernet()
assert (e != None)
e.src = "\x00\xbd\x03\x07\xfa\x00"
e.dst = "\x00\xbd\x03\x07\xfa\x00"
e.type = 0x0800
# Create a vanilla ping packet
ip = ipv4()
ip.version = 4
ip.hlen = 5
ip.tos = 0
ip.length = 64
ip.id = 1
ip.flags = 0
ip.offset = 0
ip.ttl = 64
ip.protocol = IPPROTO_ICMP
ip.src = inet_atol("192.0.2.1")
ip.dst = inet_atol("192.0.2.1")
icmp = icmpv4()
icmp.type = 8
icmp.code = 0
echo = icmpv4echo()
echo.id = 54321
echo.seq = 12345
ip.length = len(ip.bytes) + len(icmp.bytes) + len(echo.bytes)
packet = Chain([e, ip, icmp, echo])
packet.calc_checksums()
packet.encode()
import os
uname = os.uname()[0]
if uname == "FreeBSD":
devname = "edsc0"
elif uname == "Linux":
devname = "lo"
elif uname == "Darwin":
devname = "en0"
else:
print "unknown host os %s" % uname
return
wfile = PcapConnector(devname)
rfile = PcapConnector(devname)
rfile.setfilter("icmp")
count = wfile.write(packet.bytes, 42)
assert (count == 42)
got = ethernet(rfile.read())
ip = got.data
ping = ip.data
self.assertEqual(ping, icmp)
def test_pcap_live(self):
"""Test live injection and reception.
This test requires threads and must be run as root to succeed."""
import threading
e = ethernet()
assert (e != None)
e.src = "\x00\xbd\x03\x07\xfa\x00"
e.dst = "\x00\xbd\x03\x07\xfa\x00"
e.type = 0x0800
# Create a vanilla ping packet
ip = ipv4()
ip.version = 4
ip.hlen = 5
ip.tos = 0
ip.length = 64
ip.id = 1
ip.flags = 0
ip.offset = 0
ip.ttl = 64
ip.protocol = IPPROTO_ICMP
ip.src = inet_atol("192.0.2.1")
ip.dst = inet_atol("192.0.2.1")
icmp = icmpv4()
icmp.type = 8
icmp.code = 0
echo = icmpv4echo()
echo.id = 54321
echo.seq = 12345
ip.length = len(ip.bytes) + len(icmp.bytes) + len(echo.bytes)
packet = Chain([e, ip, icmp, echo])
packet.calc_checksums()
packet.encode()
import os
uname = os.uname()[0]
if uname == "FreeBSD":
devname = "edsc0"
elif uname == "Linux":
devname = "lo"
elif uname == "Darwin":
devname = "en0"
else:
print "unknown host os %s" % uname
return
wfile = PcapConnector(devname)
rfile = PcapConnector(devname)
rfile.setfilter("icmp")
count = wfile.write(packet.bytes, 42)
assert (count == 42)
got = ethernet(rfile.read())
ip = got.data
ping = ip.data
self.assertEqual(ping, icmp)
