mirror of
https://github.com/openvswitch/ovs
synced 2025-08-22 01:51:26 +00:00
bd90524550
Fixes: 1ca0323e7c29 ("Require Python 3 and remove support for Python 2.")
Reported at: https://bugzilla.redhat.com/show_bug.cgi?id=1949875
Signed-off-by: Rosemarie O'Riorden <roriorde@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
112 lines
3.3 KiB
Plaintext
Executable File
112 lines
3.3 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 binascii
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import getopt
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import struct
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import sys
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class PcapException(Exception):
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pass
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class PcapReader(object):
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def __init__(self, file_name):
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self.file = open(file_name, "rb")
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header = self.file.read(24)
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if len(header) != 24:
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raise PcapException("end of file reading pcap header")
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magic, version, thiszone, sigfigs, snaplen, network = \
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struct.unpack(">6I", header)
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if magic == 0xa1b2c3d4 or magic == 0xa1b23c4d:
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self.header_format = ">4I"
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elif magic == 0xd4c3b2a1 or magic == 0x4d3cb2a1:
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self.header_format = "<4I"
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else:
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raise PcapException("bad magic %u reading pcap file "
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"(expected 0xa1b2c3d4, 0xa1b23c4d, 0x4d3cb2a1 or "
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"0xd4c3b2a1)" % magic)
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def read(self):
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header = self.file.read(16)
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if len(header) == 0:
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return None
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elif len(header) != 16:
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raise PcapException("end of file within pcap record header")
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ts_sec, ts_usec, incl_len, orig_len = struct.unpack(self.header_format,
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header)
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packet = self.file.read(incl_len)
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if len(packet) != incl_len:
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raise PcapException("end of file reading pcap packet data")
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return packet
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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 pcap file packet data as hex
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usage: %(argv0)s FILE
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where FILE is a PCAP file.
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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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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-pcap (Open vSwitch) @VERSION@")
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else:
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sys.exit(0)
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if len(args) != 1:
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sys.stderr.write("%s: exactly 1 non-option argument required "
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"(use --help for help)\n" % argv0)
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sys.exit(1)
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reader = PcapReader(args[0])
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while True:
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packet = reader.read()
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if packet is None:
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break
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print(binascii.hexlify(packet).decode().strip())
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except PcapException as e:
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sys.stderr.write("%s: %s\n" % (argv0, e))
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sys.exit(1)
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# Local variables:
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# mode: python
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# End:
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