def callback(header, data):
src_ip = None
dst_ip = None
src_port = None
dst_port = None
layer4Type = ""
output = ""
payloadSize = 0
extract = ExtractData()
# Parse packet
decoder = ImpactDecoder.EthDecoder()
packet = decoder.decode(data)
# Parse IP packet inside ethernet one
iphdr = packet.child()
if isinstance(iphdr, IP):
# Parse TCP packet inside IP one
hdr = iphdr.child()
if isinstance(hdr, TCP) or isinstance(hdr, UDP):
if isinstance(hdr, TCP):
layer4Type = "TCP"
# Only look at SYN packets, not ACK ones
if hdr.get_SYN() and not hdr.get_ACK():
# Get src and dest IPs
src_ip = iphdr.get_ip_src()
dst_ip = iphdr.get_ip_dst()
src_port = hdr.get_th_dport()
dst_port = hdr.get_th_sport()
payloadSize = hdr.get_size() - hdr.get_header_size()
elif isinstance(hdr, UDP):
layer4Type = "UDP"
# Get src and dest IPs
src_ip = iphdr.get_ip_src()
dst_ip = iphdr.get_ip_dst()
src_port = hdr.get_th_dport()
dst_port = hdr.get_th_sport()
payloadSize = hdr.get_size() - hdr.get_header_size()
# Results are printed
output = "(%s) Connection attempted from: %s:%s to: %s:%s\n" % (
layer4Type,
src_ip,
src_port,
dst_ip,
dst_port,
)
if payloadSize != 0:
output += "\nPayload size: %d\n----%s----\n----\n" % (payloadSize, hdr.get_data_as_string())
print output
if src_ip and dst_ip:
extract.writeToFile("packetOutput.txt", output, "a")
else:
print "\nIP header doesn't exist.\n"
iphdr = None
def callback(header, data):
src_ip = None
dst_ip = None
src_port = None
dst_port = None
layer4Type = ""
output = ""
payloadSize = 0
extract = ExtractData()
#Parse packet
decoder = ImpactDecoder.EthDecoder()
packet = decoder.decode(data)
#Parse IP packet inside ethernet one
iphdr = packet.child()
if isinstance(iphdr, IP):
#Parse TCP packet inside IP one
hdr = iphdr.child()
if isinstance(hdr, TCP) or isinstance(hdr, UDP):
if isinstance(hdr, TCP):
layer4Type = "TCP"
#Only look at SYN packets, not ACK ones
if hdr.get_SYN() and not hdr.get_ACK():
#Get src and dest IPs
src_ip = iphdr.get_ip_src()
dst_ip = iphdr.get_ip_dst()
src_port = hdr.get_th_dport()
dst_port = hdr.get_th_sport()
payloadSize = hdr.get_size() - hdr.get_header_size()
elif isinstance(hdr, UDP):
layer4Type = "UDP"
#Get src and dest IPs
src_ip = iphdr.get_ip_src()
dst_ip = iphdr.get_ip_dst()
src_port = hdr.get_th_dport()
dst_port = hdr.get_th_sport()
payloadSize = hdr.get_size() - hdr.get_header_size()
#Results are printed
output = "(%s) Connection attempted from: %s:%s to: %s:%s\n" % (
layer4Type, src_ip, src_port, dst_ip, dst_port)
if (payloadSize != 0):
output += "\nPayload size: %d\n----%s----\n----\n" % (
payloadSize, hdr.get_data_as_string())
print output
if (src_ip and dst_ip):
extract.writeToFile("packetOutput.txt", output, "a")
else:
print "\nIP header doesn't exist.\n"
iphdr = None
