old_contents: #!/usr/bin/env python
  # Copyright 2009 Google Inc. All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """Generate a 'replay' data file from a tcpdump capture file.
  
  This is useful to extract DNS traffic from a real-world environment
  and benchmark it against various DNS services. Ignores subsequent hits
  as they represent DNS retries.
  """
  import subprocess
  import sys
  import re
  
  filename = sys.argv[1]
  if not filename:
    print "You must provide a filename."
    sys.exit(1)
  
  cmd = 'tcpdump -r %s -n port 53' % filename
  pipe = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout
  parse_re = re.compile(' ([A-Z]+)\? ([\-\w\.]+)')
  last_request = None
  for line in pipe:
    if '?' not in line:
      continue
    match = parse_re.search(line)
    if match:
      request = ' '.join(match.groups())
      if request != last_request:
        print request
        last_request = request
  
  
new_contents: #!/usr/bin/env python
  # Copyright 2009 Google Inc. All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """Generate a 'replay' data file from a tcpdump capture file.
  
  This is useful to extract DNS traffic from a real-world environment
  and benchmark it against various DNS services.
  """
  import subprocess
  import sys
  import re
  
  filename = sys.argv[1]
  if not filename:
    print "You must provide a filename."
    sys.exit(1)
  
  cmd = 'tcpdump -r %s -n port 53' % filename
  pipe = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout
  parse_re = re.compile(' ([A-Z]+)\? ([\-\w\.]+)')
  for line in pipe:
    if '?' not in line:
      continue
    match = parse_re.search(line)
    if match:
      print ' '.join(match.groups())
    else:
      print line
subject: Remove repeats from convert-tcpdump