mirror of
https://github.com/openvswitch/ovs
synced 2025-08-22 01:51:26 +00:00
1051576cf2
The tcpundump tool expects all packets to be a length which aligns to exactly a 4-nibble boundary. This means packets like DNS requests will be stripped before being correctly processed. Fix this by allowing at least two nibbles (or one byte) alignment. Signed-off-by: Aaron Conole <aconole@redhat.com> Signed-off-by: Ben Pfaff <blp@ovn.org>
79 lines
2.1 KiB
Plaintext
Executable File
79 lines
2.1 KiB
Plaintext
Executable File
#! @PYTHON3@
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#
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# Copyright (c) 2010 Nicira, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import getopt
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import re
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import sys
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argv0 = sys.argv[0]
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def usage():
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print("""\
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%(argv0)s: print "tcpdump -xx" output as hex
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usage: %(argv0)s < FILE
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where FILE is output from "tcpdump -xx".
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The following options are also available:
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-h, --help display this help message
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-V, --version display version information\
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""" % {'argv0': argv0})
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sys.exit(0)
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if __name__ == "__main__":
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try:
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options, args = getopt.gnu_getopt(sys.argv[1:], 'hV',
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['help', 'version'])
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except getopt.GetoptError as geo:
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sys.stderr.write("%s: %s\n" % (argv0, geo.msg))
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sys.exit(1)
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for key, value in options:
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if key in ['-h', '--help']:
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usage()
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elif key in ['-V', '--version']:
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print("ovs-tcpundump (Open vSwitch) @VERSION@")
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sys.exit(0)
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else:
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sys.exit(0)
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if len(args) != 0:
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sys.stderr.write("%s: non-option argument not supported "
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"(use --help for help)\n" % argv0)
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sys.exit(1)
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packet = ''
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regex = re.compile(r'^\s+0x([0-9a-fA-F]+): ((?: [0-9a-fA-F]{2,4})+)')
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while True:
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line = sys.stdin.readline()
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if line == "":
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break
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m = regex.match(line)
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if m is None or int(m.group(1), 16) == 0:
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if packet != '':
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print(packet)
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packet = ''
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if m:
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packet += re.sub(r'\s', '', m.group(2), 0)
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if packet != '':
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print(packet)
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# Local variables:
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# mode: python
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# End:
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