mirror of
https://github.com/adulau/netbeacon.git
synced 2024-11-23 18:47:10 +00:00
47 lines
1.4 KiB
Python
47 lines
1.4 KiB
Python
import dpkt
|
|
import pcap
|
|
import re
|
|
import sys
|
|
import socket
|
|
from optparse import OptionParser
|
|
|
|
|
|
usage = "usage: %prog [options]"
|
|
parser = OptionParser(usage)
|
|
parser.add_option("-i","--interface", dest="interface", help="live capture on interface (default:lo)")
|
|
parser.add_option("-r","--read", dest="filedump", help="read pcap file")
|
|
parser.add_option("-e","--extended", dest="extended", action="store_true", help="enable extended format including pcap timestamp")
|
|
|
|
(options, args) = parser.parse_args()
|
|
|
|
if options.interface:
|
|
interface = options.interface
|
|
else:
|
|
interface = "lo"
|
|
|
|
if options.filedump:
|
|
interface = options.filedump
|
|
|
|
pc = pcap.pcap(interface)
|
|
pc.setfilter("port 12345 and udp")
|
|
|
|
decode = { pcap.DLT_LOOP:dpkt.loopback.Loopback,
|
|
pcap.DLT_NULL:dpkt.loopback.Loopback,
|
|
pcap.DLT_EN10MB:dpkt.ethernet.Ethernet }[pc.datalink()]
|
|
|
|
try:
|
|
sys.stderr.write('listening on %s: %s' % (pc.name, pc.filter))
|
|
for ts, pkt in pc:
|
|
eth = dpkt.ethernet.Ethernet(pkt)
|
|
ip = eth.data
|
|
udp = ip.data
|
|
if re.search("^nb", udp.data):
|
|
if options.extended:
|
|
print str(ts)+"|"+str(socket.inet_ntoa(ip.src))+"|"+udp.data
|
|
else:
|
|
print udp.data
|
|
except KeyboardInterrupt:
|
|
nrecv, ndrop, nifdrop = pc.stats()
|
|
sys.stderr.write('\n%d packets received by filter' % nrecv)
|
|
sys.stderr.write('%d packets dropped by kernel' % ndrop)
|
|
|