utilities/ovs-tcpundump.in

   1 #! @PYTHON3@
   2 #
   3 # Copyright (c) 2010 Nicira, Inc.
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at:
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 import getopt
  18 import re
  19 import sys
  20
  21 argv0 = sys.argv[0]
  22
  23
  24 def usage():
  25     print("""\
  26 %(argv0)s: print "tcpdump -xx" output as hex
  27 usage: %(argv0)s < FILE
  28 where FILE is output from "tcpdump -xx".
  29
  30 The following options are also available:
  31   -h, --help                  display this help message
  32   -V, --version               display version information\
  33 """ % {'argv0': argv0})
  34     sys.exit(0)
  35
  36
  37 if __name__ == "__main__":
  38     try:
  39         options, args = getopt.gnu_getopt(sys.argv[1:], 'hV',
  40                                           ['help', 'version'])
  41     except getopt.GetoptError as geo:
  42         sys.stderr.write("%s: %s\n" % (argv0, geo.msg))
  43         sys.exit(1)
  44
  45     for key, value in options:
  46         if key in ['-h', '--help']:
  47             usage()
  48         elif key in ['-V', '--version']:
  49             print("ovs-tcpundump (Open vSwitch) @VERSION@")
  50             sys.exit(0)
  51         else:
  52             sys.exit(0)
  53
  54     if len(args) != 0:
  55         sys.stderr.write("%s: non-option argument not supported "
  56                          "(use --help for help)\n" % argv0)
  57         sys.exit(1)
  58
  59     packet = ''
  60     regex = re.compile(r'^\s+0x([0-9a-fA-F]+): ((?: [0-9a-fA-F]{2,4})+)')
  61     while True:
  62         line = sys.stdin.readline()
  63         if line == "":
  64             break
  65
  66         m = regex.match(line)
  67         if m is None or int(m.group(1), 16) == 0:
  68             if packet != '':
  69                 print(packet)
  70             packet = ''
  71         if m:
  72             packet += re.sub(r'\s', '', m.group(2), 0)
  73     if packet != '':
  74         print(packet)
  75
  76 # Local variables:
  77 # mode: python
  78 # End: