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Commit | Line | Data |
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b49a959b | 1 | #! @PYTHON@ |
7aa697dd | 2 | # |
e0edde6f | 3 | # Copyright (c) 2010 Nicira, Inc. |
7aa697dd BP |
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 | ||
8ea171ab RB |
17 | from __future__ import print_function |
18 | ||
7aa697dd BP |
19 | import binascii |
20 | import getopt | |
21 | import struct | |
22 | import sys | |
23 | ||
bdca6c4b | 24 | |
7aa697dd BP |
25 | class PcapException(Exception): |
26 | pass | |
27 | ||
bdca6c4b | 28 | |
7aa697dd BP |
29 | class PcapReader(object): |
30 | def __init__(self, file_name): | |
31 | self.file = open(file_name, "rb") | |
32 | header = self.file.read(24) | |
33 | if len(header) != 24: | |
34 | raise PcapException("end of file reading pcap header") | |
35 | magic, version, thiszone, sigfigs, snaplen, network = \ | |
36 | struct.unpack(">6I", header) | |
2b2532dd | 37 | if magic == 0xa1b2c3d4 or magic == 0xa1b23c4d: |
7aa697dd | 38 | self.header_format = ">4I" |
2b2532dd | 39 | elif magic == 0xd4c3b2a1 or magic == 0x4d3cb2a1: |
7aa697dd BP |
40 | self.header_format = "<4I" |
41 | else: | |
42 | raise PcapException("bad magic %u reading pcap file " | |
2b2532dd MM |
43 | "(expected 0xa1b2c3d4, 0xa1b23c4d, 0x4d3cb2a1 or " |
44 | "0xd4c3b2a1)" % magic) | |
7aa697dd BP |
45 | |
46 | def read(self): | |
47 | header = self.file.read(16) | |
48 | if len(header) == 0: | |
49 | return None | |
50 | elif len(header) != 16: | |
51 | raise PcapException("end of file within pcap record header") | |
52 | ||
53 | ts_sec, ts_usec, incl_len, orig_len = struct.unpack(self.header_format, | |
54 | header) | |
55 | packet = self.file.read(incl_len) | |
56 | if len(packet) != incl_len: | |
57 | raise PcapException("end of file reading pcap packet data") | |
58 | return packet | |
81a86b9a JS |
59 | |
60 | ||
7aa697dd BP |
61 | argv0 = sys.argv[0] |
62 | ||
bdca6c4b | 63 | |
7aa697dd | 64 | def usage(): |
8ea171ab | 65 | print("""\ |
7aa697dd BP |
66 | %(argv0)s: print pcap file packet data as hex |
67 | usage: %(argv0)s FILE | |
68 | where FILE is a PCAP file. | |
69 | ||
70 | The following options are also available: | |
71 | -h, --help display this help message | |
72 | -V, --version display version information\ | |
8ea171ab | 73 | """ % {'argv0': argv0}) |
7aa697dd BP |
74 | sys.exit(0) |
75 | ||
81a86b9a | 76 | |
7aa697dd BP |
77 | if __name__ == "__main__": |
78 | try: | |
79 | try: | |
80 | options, args = getopt.gnu_getopt(sys.argv[1:], 'hV', | |
81 | ['help', 'version']) | |
f3068bff | 82 | except getopt.GetoptException as geo: |
7aa697dd BP |
83 | sys.stderr.write("%s: %s\n" % (argv0, geo.msg)) |
84 | sys.exit(1) | |
85 | ||
86 | for key, value in options: | |
87 | if key in ['-h', '--help']: | |
88 | usage() | |
89 | elif key in ['-V', '--version']: | |
8ea171ab | 90 | print("ovs-pcap (Open vSwitch) @VERSION@") |
7aa697dd BP |
91 | else: |
92 | sys.exit(0) | |
93 | ||
94 | if len(args) != 1: | |
95 | sys.stderr.write("%s: exactly 1 non-option argument required " | |
96 | "(use --help for help)\n" % argv0) | |
97 | sys.exit(1) | |
98 | ||
99 | reader = PcapReader(args[0]) | |
100 | while True: | |
101 | packet = reader.read() | |
102 | if packet is None: | |
103 | break | |
104 | ||
7d8eadce | 105 | print(binascii.hexlify(packet).decode().strip()) |
7aa697dd | 106 | |
f3068bff | 107 | except PcapException as e: |
7aa697dd BP |
108 | sys.stderr.write("%s: %s\n" % (argv0, e)) |
109 | sys.exit(1) | |
110 | ||
111 | # Local variables: | |
112 | # mode: python | |
113 | # End: |