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#!/usr/bin/python
#
# Tool to index protocols that appears in the given capture files
#
# Copyright 2009, Kovarththanan Rajaratnam <kovarththanan.rajaratnam@gmail.com>
#
# $Id$
#
# Wireshark - Network traffic analyzer
# By Gerald Combs <gerald@wireshark.org>
# Copyright 1998 Gerald Combs
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
from optparse import OptionParser
import multiprocessing
import sys
import os
import subprocess
import re
import pickle
def process_capture_file(tshark, file):
try:
cmd = [tshark, "-Tfields", "-e", "frame.protocols", "-r", file]
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
(stdout, stderr) = p.communicate()
if p.returncode != 0:
return (file, {})
proto_hash = {}
for line in stdout.splitlines():
if not re.match(r'^[\w:-]+$', line):
continue
for proto in line.split(':'):
proto_hash[proto] = 1 + proto_hash.setdefault(proto, 0)
return (file, proto_hash)
except KeyboardInterrupt:
return None
def list_all_proto(cap_hash):
proto_hash = {}
for files_hash in cap_hash.itervalues():
for proto,count in files_hash.iteritems():
proto_hash[proto] = count + proto_hash.setdefault(proto, 0)
print proto_hash
def list_all_files(cap_hash):
files = cap_hash.keys()
files.sort()
print files
def list_all_proto_files(cap_hash, proto_comma_delit):
protos = [ x.strip() for x in proto_comma_delit.split(',') ]
files = []
for (file, files_hash) in cap_hash.iteritems():
for proto in files_hash.iterkeys():
if proto in protos:
files.append(file)
break
print files
def index_file_action(options):
return options.list_all_proto or \
options.list_all_files or \
options.list_all_proto_files
def find_capture_files(paths, cap_hash):
cap_files = []
for path in paths:
if os.path.isdir(path):
path = os.path.normpath(path)
for root, dirs, files in os.walk(path):
cap_files += [os.path.join(root, name) for name in files if os.path.join(root, name) not in cap_hash]
elif path not in cap_hash:
cap_files.append(path)
return cap_files
def find_tshark_executable(bin_dir):
for file in ["tshark.exe", "tshark"]:
tshark = os.path.join(bin_dir, file)
if os.access(tshark, os.X_OK):
return tshark
return None
def main():
parser = OptionParser(usage="usage: %prog [options] index_file [file_1|dir_1 [.. file_n|dir_n]]")
parser.add_option("-m", "--max-files", dest="max_files", default=sys.maxint, type="int",
help="Max number of files to process")
parser.add_option("-b", "--binary-dir", dest="bin_dir", default=os.getcwd(),
help="Directory containing tshark executable")
parser.add_option("-j", dest="num_procs", default=1, type=int,
help="Max number of processes to spawn")
parser.add_option("", "--list-all-proto", dest="list_all_proto", default=False, action="store_true",
help="List all protocols in index file")
parser.add_option("", "--list-all-files", dest="list_all_files", default=False, action="store_true",
help="List all files in index file")
parser.add_option("", "--list-all-proto-files", dest="list_all_proto_files", default=False,
metavar="PROTO_1[, .. PROTO_N]",
help="List all files in index file containing the given protocol")
(options, args) = parser.parse_args()
if len(args) == 0:
parser.error("index_file is a required argument")
if len(args) == 1 and not index_file_action(options):
parser.error("one capture file/directory must be specified")
index_file_name = args.pop(0)
cap_hash = {}
try:
index_file = open(index_file_name, "r")
print "index file:", index_file.name, "[OPENED]",
cap_hash = pickle.load(index_file)
index_file.close()
print len(cap_hash), "files"
except IOError:
print "index file:", index_file_name, "[NEW]"
if options.list_all_proto:
list_all_proto(cap_hash)
exit(0)
if options.list_all_files:
list_all_files(cap_hash)
exit(0)
if options.list_all_proto_files:
list_all_proto_files(cap_hash, options.list_all_proto_files)
exit(0)
tshark = find_tshark_executable(options.bin_dir)
if not tshark is None:
print "tshark:", tshark, "[FOUND]"
else:
print "tshark:", tshark, "[MISSING]"
exit(1)
paths = args
cap_files = find_capture_files(paths, cap_hash)
cap_files.sort()
options.max_files = min(options.max_files, len(cap_files))
print "%u total files, %u indexable files\n" % (len(cap_files), options.max_files)
cap_files = cap_files[:options.max_files]
pool = multiprocessing.Pool(options.num_procs)
results = [pool.apply_async(process_capture_file, [tshark, file]) for file in cap_files]
try:
for (cur_item_idx,result) in enumerate(results):
file_result = result.get()
action = "SKIPPED" if file_result[1] is {} else "PROCESSED"
print "%s [%u/%u] %s %u bytes" % (action, cur_item_idx+1, options.max_files, file_result[0], os.path.getsize(file_result[0]))
cap_hash.update(dict([file_result]))
except KeyboardInterrupt:
print "%s was interrupted by user" % (sys.argv[0])
pool.terminate()
index_file = open(index_file_name, "w")
pickle.dump(cap_hash, index_file)
index_file.close()
if __name__ == "__main__":
main()
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