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| 1 # Copyright (C) 2001-2007, 2009, 2010 Nominum, Inc. | |
| 2 # | |
| 3 # Permission to use, copy, modify, and distribute this software and its | |
| 4 # documentation for any purpose with or without fee is hereby granted, | |
| 5 # provided that the above copyright notice and this permission notice | |
| 6 # appear in all copies. | |
| 7 # | |
| 8 # THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES | |
| 9 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
| 10 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR | |
| 11 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 12 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 13 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | |
| 14 # OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 15 | |
| 16 """DNS Message Flags.""" | |
| 17 | |
| 18 # Standard DNS flags | |
| 19 | |
| 20 QR = 0x8000 | |
| 21 AA = 0x0400 | |
| 22 TC = 0x0200 | |
| 23 RD = 0x0100 | |
| 24 RA = 0x0080 | |
| 25 AD = 0x0020 | |
| 26 CD = 0x0010 | |
| 27 | |
| 28 # EDNS flags | |
| 29 | |
| 30 DO = 0x8000 | |
| 31 | |
| 32 _by_text = { | |
| 33 'QR' : QR, | |
| 34 'AA' : AA, | |
| 35 'TC' : TC, | |
| 36 'RD' : RD, | |
| 37 'RA' : RA, | |
| 38 'AD' : AD, | |
| 39 'CD' : CD | |
| 40 } | |
| 41 | |
| 42 _edns_by_text = { | |
| 43 'DO' : DO | |
| 44 } | |
| 45 | |
| 46 | |
| 47 # We construct the inverse mappings programmatically to ensure that we | |
| 48 # cannot make any mistakes (e.g. omissions, cut-and-paste errors) that | |
| 49 # would cause the mappings not to be true inverses. | |
| 50 | |
| 51 _by_value = dict([(y, x) for x, y in _by_text.iteritems()]) | |
| 52 | |
| 53 _edns_by_value = dict([(y, x) for x, y in _edns_by_text.iteritems()]) | |
| 54 | |
| 55 def _order_flags(table): | |
| 56 order = list(table.iteritems()) | |
| 57 order.sort() | |
| 58 order.reverse() | |
| 59 return order | |
| 60 | |
| 61 _flags_order = _order_flags(_by_value) | |
| 62 | |
| 63 _edns_flags_order = _order_flags(_edns_by_value) | |
| 64 | |
| 65 def _from_text(text, table): | |
| 66 flags = 0 | |
| 67 tokens = text.split() | |
| 68 for t in tokens: | |
| 69 flags = flags | table[t.upper()] | |
| 70 return flags | |
| 71 | |
| 72 def _to_text(flags, table, order): | |
| 73 text_flags = [] | |
| 74 for k, v in order: | |
| 75 if flags & k != 0: | |
| 76 text_flags.append(v) | |
| 77 return ' '.join(text_flags) | |
| 78 | |
| 79 def from_text(text): | |
| 80 """Convert a space-separated list of flag text values into a flags | |
| 81 value. | |
| 82 @rtype: int""" | |
| 83 | |
| 84 return _from_text(text, _by_text) | |
| 85 | |
| 86 def to_text(flags): | |
| 87 """Convert a flags value into a space-separated list of flag text | |
| 88 values. | |
| 89 @rtype: string""" | |
| 90 | |
| 91 return _to_text(flags, _by_value, _flags_order) | |
| 92 | |
| 93 | |
| 94 def edns_from_text(text): | |
| 95 """Convert a space-separated list of EDNS flag text values into a EDNS | |
| 96 flags value. | |
| 97 @rtype: int""" | |
| 98 | |
| 99 return _from_text(text, _edns_by_text) | |
| 100 | |
| 101 def edns_to_text(flags): | |
| 102 """Convert an EDNS flags value into a space-separated list of EDNS flag | |
| 103 text values. | |
| 104 @rtype: string""" | |
| 105 | |
| 106 return _to_text(flags, _edns_by_value, _edns_flags_order) | |
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Chromium Code Reviews
Issue 2210063003:
Rename third_party/webpagereplay to third_party/web-page-replay (Closed)
Base URL: https://github.com/catapult-project/catapult@master