def initHeader(self):
"""Initialize the IP header according to the IP format definition.
"""
# Ethernet header
# Retrieve remote MAC address
dstMacAddr = arpreq.arpreq(self.remoteIP)
if dstMacAddr is not None:
dstMacAddr = dstMacAddr.replace(':', '')
dstMacAddr = binascii.unhexlify(dstMacAddr)
else:
# Force ARP resolution
p = subprocess.Popen(["/bin/ping", "-c1", self.remoteIP])
p.wait()
time.sleep(0.1)
dstMacAddr = arpreq.arpreq(self.remoteIP)
if dstMacAddr is not None:
dstMacAddr = dstMacAddr.replace(':', '')
dstMacAddr = binascii.unhexlify(dstMacAddr)
else:
raise Exception("Cannot resolve IP address to a MAC address for IP: '{}'".format(self.remoteIP))
# Retrieve local MAC address
srcMacAddr = self.get_interface_addr(bytes(self.interface, 'utf-8'))[1]
eth_dst = Field(name='eth.dst', domain=Raw(dstMacAddr))
eth_src = Field(name='eth.src', domain=Raw(srcMacAddr))
eth_type = Field(name='eth.type', domain=Raw(b"\x08\x00"))
# IP header
ip_ver = Field(
name='ip.version', domain=BitArray(
value=bitarray('0100'))) # IP Version 4
ip_ihl = Field(name='ip.hdr_len', domain=BitArray(bitarray('0000')))
ip_tos = Field(
name='ip.tos',
domain=Data(
dataType=BitArray(nbBits=8),
originalValue=bitarray('00000000'),
svas=SVAS.PERSISTENT))
ip_tot_len = Field(
name='ip.len', domain=BitArray(bitarray('0000000000000000')))
ip_id = Field(name='ip.id', domain=BitArray(nbBits=16))
ip_flags = Field(name='ip.flags', domain=Data(dataType=BitArray(nbBits=3), originalValue=bitarray('000'), svas=SVAS.PERSISTENT))
ip_frag_off = Field(name='ip.fragment', domain=Data(dataType=BitArray(nbBits=13), originalValue=bitarray('0000000000000'), svas=SVAS.PERSISTENT))
ip_ttl = Field(name='ip.ttl', domain=Data(dataType=BitArray(nbBits=8), originalValue=bitarray('01000000'), svas=SVAS.PERSISTENT))
ip_proto = Field(name='ip.proto', domain=Integer(value=self.upperProtocol, unitSize=AbstractType.UNITSIZE_8, endianness=AbstractType.ENDIAN_BIG, sign=AbstractType.SIGN_UNSIGNED))
ip_checksum = Field(name='ip.checksum', domain=BitArray(bitarray('0000000000000000')))
ip_saddr = Field(name='ip.src', domain=IPv4(self.localIP))
ip_daddr = Field(
name='ip.dst', domain=IPv4(self.remoteIP))
ip_payload = Field(name='ip.payload', domain=Raw())
ip_ihl.domain = Size([ip_ver,
ip_ihl,
ip_tos,
ip_tot_len,
ip_id, ip_flags,
ip_frag_off,
ip_ttl, ip_proto,
ip_checksum,
ip_saddr,
ip_daddr], dataType=BitArray(nbBits=4), factor=1/float(32))
ip_tot_len.domain = Size([ip_ver,
ip_ihl,
ip_tos,
ip_tot_len,
ip_id,
ip_flags,
ip_frag_off,
ip_ttl,
ip_proto,
ip_checksum,
ip_saddr,
ip_daddr,
ip_payload], dataType=Integer(unitSize=AbstractType.UNITSIZE_16, sign=AbstractType.SIGN_UNSIGNED), factor=1/float(8))
ip_checksum.domain = InternetChecksum(fields=[ip_ver,
ip_ihl,
ip_tos,
ip_tot_len,
ip_id,
ip_flags,
ip_frag_off,
ip_ttl,
ip_proto,
ip_checksum,
ip_saddr,
ip_daddr], dataType=Raw(nbBytes=2, unitSize=AbstractType.UNITSIZE_16))
self.header = Symbol(name='Ethernet layer', fields=[eth_dst,
eth_src,
eth_type,
ip_ver,
ip_ihl,
ip_tos,
ip_tot_len,
ip_id,
ip_flags,
ip_frag_off,
ip_ttl,
ip_proto,
ip_checksum,
ip_saddr,
ip_daddr,
ip_payload])
def buildPacket(self, payload):
"""Build a raw IP packet including the IP layer and its payload.
:parameter payload: the payload to write on the channel
:type payload: binary object
"""
ip_ver = Field(name='Version', domain=BitArray(value=bitarray('0100'))) # IP Version 4
ip_ihl = Field(name='Header length', domain=BitArray(bitarray('0000')))
ip_tos = Field(name='TOS', domain=Data(dataType=BitArray(nbBits=8), originalValue=bitarray('00000000'), svas=SVAS.PERSISTENT))
ip_tot_len = Field(name='Total length', domain=BitArray(bitarray('0000000000000000')))
ip_id = Field(name='Identification number', domain=BitArray(nbBits=16))
ip_flags = Field(name='Flags', domain=Data(dataType=BitArray(nbBits=3), originalValue=bitarray('000'), svas=SVAS.PERSISTENT))
ip_frag_off = Field(name='Fragment offset', domain=Data(dataType=BitArray(nbBits=13), originalValue=bitarray('0000000000000'), svas=SVAS.PERSISTENT))
ip_ttl = Field(name='TTL', domain=Data(dataType=BitArray(nbBits=8), originalValue=bitarray('10000000'), svas=SVAS.PERSISTENT))
ip_proto = Field(name='Protocol', domain=Integer(value=self.upperProtocol, unitSize=AbstractType.UNITSIZE_8, endianness=AbstractType.ENDIAN_BIG, sign=AbstractType.SIGN_UNSIGNED))
ip_checksum = Field(name='Checksum', domain=BitArray(bitarray('0000000000000000')))
ip_saddr = Field(name='Source address', domain=IPv4(self.localIP))
ip_daddr = Field(name='Destination address', domain=IPv4(self.remoteIP))
ip_payload = Field(name='Payload', domain=payload)
ip_ihl.domain = Size([ip_ver,
ip_ihl,
ip_tos,
ip_tot_len,
ip_id, ip_flags,
ip_frag_off,
ip_ttl, ip_proto,
ip_checksum,
ip_saddr,
ip_daddr], dataType=BitArray(nbBits=4), factor=1/float(32))
ip_tot_len.domain = Size([ip_ver,
ip_ihl,
ip_tos,
ip_tot_len,
ip_id,
ip_flags,
ip_frag_off,
ip_ttl,
ip_proto,
ip_checksum,
ip_saddr,
ip_daddr,
ip_payload], dataType=Raw(nbBytes=2), factor=1/float(8))
ip_checksum.domain = InternetChecksum(fields=[ip_ver,
ip_ihl,
ip_tos,
ip_tot_len,
ip_id,
ip_flags,
ip_frag_off,
ip_ttl,
ip_proto,
ip_checksum,
ip_saddr,
ip_daddr], dataType=Raw(nbBytes=2))
packet = Symbol(name='IP layer', fields=[ip_ver,
ip_ihl,
ip_tos,
ip_tot_len,
ip_id,
ip_flags,
ip_frag_off,
ip_ttl,
ip_proto,
ip_checksum,
ip_saddr,
ip_daddr,
ip_payload])
return packet.specialize()
def initHeader(self):
"""Initialize the IP header according to the IP format definition.
"""
ip_ver = Field(
name='ip.version', domain=BitArray(
value=bitarray('0100'))) # IP Version 4
ip_ihl = Field(name='ip.hdr_len', domain=BitArray(bitarray('0000')))
ip_tos = Field(
name='ip.tos',
domain=Data(
dataType=BitArray(nbBits=8),
originalValue=bitarray('00000000'),
svas=SVAS.PERSISTENT))
ip_tot_len = Field(
name='ip.len', domain=BitArray(bitarray('0000000000000000')))
ip_id = Field(name='ip.id', domain=BitArray(nbBits=16))
ip_flags = Field(name='ip.flags', domain=Data(dataType=BitArray(nbBits=3), originalValue=bitarray('000'), svas=SVAS.PERSISTENT))
ip_frag_off = Field(name='ip.fragment', domain=Data(dataType=BitArray(nbBits=13), originalValue=bitarray('0000000000000'), svas=SVAS.PERSISTENT))
ip_ttl = Field(name='ip.ttl', domain=Data(dataType=BitArray(nbBits=8), originalValue=bitarray('01000000'), svas=SVAS.PERSISTENT))
ip_proto = Field(name='ip.proto', domain=Integer(value=self.upperProtocol, unitSize=AbstractType.UNITSIZE_8, endianness=AbstractType.ENDIAN_BIG, sign=AbstractType.SIGN_UNSIGNED))
ip_checksum = Field(name='ip.checksum', domain=BitArray(bitarray('0000000000000000')))
ip_saddr = Field(name='ip.src', domain=IPv4(self.localIP))
ip_daddr = Field(
name='ip.dst', domain=IPv4(self.remoteIP))
ip_payload = Field(name='ip.payload', domain=Raw())
ip_ihl.domain = Size([ip_ver,
ip_ihl,
ip_tos,
ip_tot_len,
ip_id, ip_flags,
ip_frag_off,
ip_ttl, ip_proto,
ip_checksum,
ip_saddr,
ip_daddr], dataType=BitArray(nbBits=4), factor=1/float(32))
ip_tot_len.domain = Size([ip_ver,
ip_ihl,
ip_tos,
ip_tot_len,
ip_id,
ip_flags,
ip_frag_off,
ip_ttl,
ip_proto,
ip_checksum,
ip_saddr,
ip_daddr,
ip_payload], dataType=Integer(unitSize=AbstractType.UNITSIZE_16, sign=AbstractType.SIGN_UNSIGNED), factor=1/float(8))
ip_checksum.domain = InternetChecksum(fields=[ip_ver,
ip_ihl,
ip_tos,
ip_tot_len,
ip_id,
ip_flags,
ip_frag_off,
ip_ttl,
ip_proto,
ip_checksum,
ip_saddr,
ip_daddr], dataType=Raw(nbBytes=2, unitSize=AbstractType.UNITSIZE_16))
self.header = Symbol(name='IP layer', fields=[ip_ver,
ip_ihl,
ip_tos,
ip_tot_len,
ip_id,
ip_flags,
ip_frag_off,
ip_ttl,
ip_proto,
ip_checksum,
ip_saddr,
ip_daddr,
ip_payload])
def initHeader(self):
"""Initialize the IP header according to the IP format definition.
"""
# Ethernet header
# Retrieve remote MAC address
dstMacAddr = get_mac_address(ip=self.remoteIP)
if dstMacAddr is not None:
dstMacAddr = dstMacAddr.replace(':', '')
dstMacAddr = binascii.unhexlify(dstMacAddr)
else:
# Force ARP resolution
p = subprocess.Popen(["/bin/ping", "-c1", self.remoteIP])
p.wait()
time.sleep(0.1)
dstMacAddr = get_mac_address(ip=self.remoteIP)
if dstMacAddr is not None:
dstMacAddr = dstMacAddr.replace(':', '')
dstMacAddr = binascii.unhexlify(dstMacAddr)
else:
raise Exception(
"Cannot resolve IP address to a MAC address for IP: '{}'".
format(self.remoteIP))
# Retrieve local MAC address
srcMacAddr = self.get_interface_addr(bytes(self.interface, 'utf-8'))[1]
eth_dst = Field(name='eth.dst', domain=Raw(dstMacAddr))
eth_src = Field(name='eth.src', domain=Raw(srcMacAddr))
eth_type = Field(name='eth.type', domain=Raw(b"\x08\x00"))
# IP header
ip_ver = Field(name='ip.version',
domain=BitArray(value=bitarray('0100'))) # IP Version 4
ip_ihl = Field(name='ip.hdr_len', domain=BitArray(bitarray('0000')))
ip_tos = Field(name='ip.tos',
domain=Data(dataType=BitArray(nbBits=8),
originalValue=bitarray('00000000'),
svas=SVAS.PERSISTENT))
ip_tot_len = Field(name='ip.len',
domain=BitArray(bitarray('0000000000000000')))
ip_id = Field(name='ip.id', domain=BitArray(nbBits=16))
ip_flags = Field(name='ip.flags',
domain=Data(dataType=BitArray(nbBits=3),
originalValue=bitarray('000'),
svas=SVAS.PERSISTENT))
ip_frag_off = Field(name='ip.fragment',
domain=Data(
dataType=BitArray(nbBits=13),
originalValue=bitarray('0000000000000'),
svas=SVAS.PERSISTENT))
ip_ttl = Field(name='ip.ttl',
domain=Data(dataType=BitArray(nbBits=8),
originalValue=bitarray('01000000'),
svas=SVAS.PERSISTENT))
ip_proto = Field(name='ip.proto',
domain=Integer(value=self.upperProtocol,
unitSize=AbstractType.UNITSIZE_8,
endianness=AbstractType.ENDIAN_BIG,
sign=AbstractType.SIGN_UNSIGNED))
ip_checksum = Field(name='ip.checksum',
domain=BitArray(bitarray('0000000000000000')))
ip_saddr = Field(name='ip.src', domain=IPv4(self.localIP))
ip_daddr = Field(name='ip.dst', domain=IPv4(self.remoteIP))
ip_payload = Field(name='ip.payload', domain=Raw())
ip_ihl.domain = Size([
ip_ver, ip_ihl, ip_tos, ip_tot_len, ip_id, ip_flags, ip_frag_off,
ip_ttl, ip_proto, ip_checksum, ip_saddr, ip_daddr
],
dataType=BitArray(nbBits=4),
factor=1 / float(32))
ip_tot_len.domain = Size([
ip_ver, ip_ihl, ip_tos, ip_tot_len, ip_id, ip_flags, ip_frag_off,
ip_ttl, ip_proto, ip_checksum, ip_saddr, ip_daddr, ip_payload
],
dataType=Integer(
unitSize=AbstractType.UNITSIZE_16,
sign=AbstractType.SIGN_UNSIGNED),
factor=1 / float(8))
ip_checksum.domain = InternetChecksum(
fields=[
ip_ver, ip_ihl, ip_tos, ip_tot_len, ip_id, ip_flags,
ip_frag_off, ip_ttl, ip_proto, ip_checksum, ip_saddr, ip_daddr
],
dataType=Raw(nbBytes=2, unitSize=AbstractType.UNITSIZE_16))
self.header = Symbol(name='Ethernet layer',
fields=[
eth_dst, eth_src, eth_type, ip_ver, ip_ihl,
ip_tos, ip_tot_len, ip_id, ip_flags,
ip_frag_off, ip_ttl, ip_proto, ip_checksum,
ip_saddr, ip_daddr, ip_payload
])
def initHeader(self):
"""Initialize the IP header according to the IP format definition.
"""
ip_ver = Field(name='ip.version',
domain=BitArray(value=bitarray('0100'))) # IP Version 4
ip_ihl = Field(name='ip.hdr_len', domain=BitArray(bitarray('0000')))
ip_tos = Field(name='ip.tos',
domain=Data(dataType=BitArray(nbBits=8),
originalValue=bitarray('00000000'),
svas=SVAS.PERSISTENT))
ip_tot_len = Field(name='ip.len',
domain=BitArray(bitarray('0000000000000000')))
ip_id = Field(name='ip.id', domain=BitArray(nbBits=16))
ip_flags = Field(name='ip.flags',
domain=Data(dataType=BitArray(nbBits=3),
originalValue=bitarray('000'),
svas=SVAS.PERSISTENT))
ip_frag_off = Field(name='ip.fragment',
domain=Data(
dataType=BitArray(nbBits=13),
originalValue=bitarray('0000000000000'),
svas=SVAS.PERSISTENT))
ip_ttl = Field(name='ip.ttl',
domain=Data(dataType=BitArray(nbBits=8),
originalValue=bitarray('01000000'),
svas=SVAS.PERSISTENT))
ip_proto = Field(name='ip.proto',
domain=Integer(value=self.upperProtocol,
unitSize=AbstractType.UNITSIZE_8,
endianness=AbstractType.ENDIAN_BIG,
sign=AbstractType.SIGN_UNSIGNED))
ip_checksum = Field(name='ip.checksum',
domain=BitArray(bitarray('0000000000000000')))
ip_saddr = Field(name='ip.src', domain=IPv4(self.localIP))
ip_daddr = Field(name='ip.dst', domain=IPv4(self.remoteIP))
ip_payload = Field(name='ip.payload', domain=Raw())
ip_ihl.domain = Size([
ip_ver, ip_ihl, ip_tos, ip_tot_len, ip_id, ip_flags, ip_frag_off,
ip_ttl, ip_proto, ip_checksum, ip_saddr, ip_daddr
],
dataType=BitArray(nbBits=4),
factor=1 / float(32))
ip_tot_len.domain = Size([
ip_ver, ip_ihl, ip_tos, ip_tot_len, ip_id, ip_flags, ip_frag_off,
ip_ttl, ip_proto, ip_checksum, ip_saddr, ip_daddr, ip_payload
],
dataType=Integer(
unitSize=AbstractType.UNITSIZE_16,
sign=AbstractType.SIGN_UNSIGNED),
factor=1 / float(8))
ip_checksum.domain = InternetChecksum(
fields=[
ip_ver, ip_ihl, ip_tos, ip_tot_len, ip_id, ip_flags,
ip_frag_off, ip_ttl, ip_proto, ip_checksum, ip_saddr, ip_daddr
],
dataType=Raw(nbBytes=2, unitSize=AbstractType.UNITSIZE_16))
self.header = Symbol(name='IP layer',
fields=[
ip_ver, ip_ihl, ip_tos, ip_tot_len, ip_id,
ip_flags, ip_frag_off, ip_ttl, ip_proto,
ip_checksum, ip_saddr, ip_daddr, ip_payload
])
