def create_packet_ipcp_config(dst,
src,
sessionid,
code,
id=0x01,
ip=b'\x00\x00\x00\x00'):
"""
Create IPCP Configuration Request packet
:param dst: Destination MAC
:param src: Source MAC
:param sessionid: PPPoE session id
:param code: LCP code
:param id: Message id
:param ip: 0.0.0.0 ip address
:return: packet
"""
options = []
options.append(PPP_IPCP_Option(type=0x03, data=ip))
packet = Ether(dst=dst, src=src, type=0x8864) / \
PPPoE(version=1, type=1, sessionid=sessionid) / \
PPP(proto=0x8021) / \
PPP_IPCP(code=code, id=id, options=options)
return packet
def create_packet_lcp_config(dst,
src,
sessionid,
code,
magic,
id=0x01,
mru=1492):
"""
Create lcp packet
:param dst: Destination MAC
:param src: Source MAC
:param sessionid: PPPoE session id
:param code: LCP code
:param id: Message id
:param mru: MRU value
:param magic: Magic value
:return: packet
"""
options = []
options.append(
PPP_LCP_Option(type=0x01, data=mru.to_bytes(2, byteorder='big')))
options.append(
PPP_LCP_Option(type=0x05, data=magic.to_bytes(4, byteorder='big')))
packet = Ether(dst=dst, src=src, type=0x8864) / \
PPPoE(version=1, type=1, sessionid=sessionid) / \
PPP(proto=0xc021) / \
PPP_LCP(code=code, id=id, options=options)
return packet
def process_packet(self, pack: PPP):
if not pack.haslayer(TCP):
return
four_tuple = (pack[IP].src, str(pack[TCP].sport), pack[IP].dst,
str(pack[TCP].dport))
if four_tuple in self.connections:
connection = self.connections[four_tuple]
else:
if not pack[TCP].flags.S:
return
connection = self.connections[four_tuple] = ConnectionProcessor(
pack, self.bandwidth)
connection.process(pack)
def create_stream_pppoe_lcp(self, src_if, dst_if,
client_mac, session_id, count=1):
packets = []
for i in range(count):
# create packet info stored in the test case instance
info = self.create_packet_info(src_if, dst_if)
# convert the info into packet payload
payload = self.info_to_payload(info)
# create the packet itself
p = (Ether(dst=src_if.local_mac, src=client_mac) /
PPPoE(sessionid=session_id) /
PPP(proto=0xc021) /
Raw(payload))
# store a copy of the packet in the packet info
info.data = p.copy()
# append the packet to the list
packets.append(p)
# return the created packet list
return packets
def create_packet_lcp_config_pkt(dst, src, sessionid, source, code):
"""
Take source packet
Get last fields
Form new packet
Then copy last fields
:param dst: Destination MAC
:param src: Source MAC
:param sessionid: PPPoE session id
:param source: source packet
:param code: LCP code
:return: packet
"""
packet = Ether(dst=dst, src=src, type=0x8864) / \
PPPoE(version=1, type=1, sessionid=sessionid) / \
PPP(proto=0xc021) / \
source[PPP_LCP]
packet[PPP_LCP].code = code
return packet
def pkt_add_pppoe(pkt, type, code, session_id):
return Ether(src=pkt[Ether].src, dst=pkt[Ether].dst) / \
PPPoE(version=1, type=type, code=code, sessionid=session_id) / \
PPP(proto=0x0021) / pkt[Ether].payload
packetizer = Packetizer()
packetizer.from_file(sys.argv[1])
packetizer.escape_packets()
with open(sys.argv[2] + ".original_packets", "w+") as orig_fh:
with open(sys.argv[2] + ".timestamps", "w+") as index_fh:
with open(sys.argv[2] + ".packets", "w+") as fh:
for idx, orig_packet in enumerate(packetizer.packets):
if idx < len(packetizer.escaped_packets):
packet = packetizer.escaped_packets[idx]
print(
f"\n= WRITE PACKET {idx} ===================================="
)
trimmed_packet = packet[1:-3]
scapy_summary = PPP(trimmed_packet).summary()
print(scapy_summary)
if packet_search_string and packet_search_string in scapy_summary:
with open(sys.argv[2] + ".match",
"w+") as match_fh:
match_fh.write(scapy_summary)
hexdump(trimmed_packet)
if packet[0] != 0x7E or packet[-1] != 0x7E:
print(f"[WARN] Improperly formatted PPP packet")
# continue
fh.write('\n')
fh.write(hexdump(trimmed_packet, dump=True))
fh.write('\n')
index_fh.write(
str(packetizer.packet_start_indices[idx]) + '\n')
orig_fh.write('\n')
