Mercurial > hg
annotate hgext/zeroconf/Zeroconf.py @ 26587:56b2bcea2529
error: get Abort from 'error' instead of 'util'
The home of 'Abort' is 'error' not 'util' however, a lot of code seems to be
confused about that and gives all the credit to 'util' instead of the
hardworking 'error'. In a spirit of equity, we break the cycle of injustice and
give back to 'error' the respect it deserves. And screw that 'util' poser.
For great justice.
author | Pierre-Yves David <pierre-yves.david@fb.com> |
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date | Thu, 08 Oct 2015 12:55:45 -0700 |
parents | 31f32a96e1e3 |
children | b502138f5faa |
rev | line source |
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1 """ Multicast DNS Service Discovery for Python, v0.12 |
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2 Copyright (C) 2003, Paul Scott-Murphy |
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3 |
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4 This module provides a framework for the use of DNS Service Discovery |
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5 using IP multicast. It has been tested against the JRendezvous |
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6 implementation from <a href="http://strangeberry.com">StrangeBerry</a>, |
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7 and against the mDNSResponder from Mac OS X 10.3.8. |
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8 |
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9 This library is free software; you can redistribute it and/or |
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10 modify it under the terms of the GNU Lesser General Public |
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11 License as published by the Free Software Foundation; either |
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12 version 2.1 of the License, or (at your option) any later version. |
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13 |
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14 This library is distributed in the hope that it will be useful, |
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15 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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17 Lesser General Public License for more details. |
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18 |
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19 You should have received a copy of the GNU Lesser General Public |
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20 License along with this library; if not, see |
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21 <http://www.gnu.org/licenses/>. |
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22 |
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23 """ |
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24 |
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25 """0.12 update - allow selection of binding interface |
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26 typo fix - Thanks A. M. Kuchlingi |
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27 removed all use of word 'Rendezvous' - this is an API change""" |
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28 |
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29 """0.11 update - correction to comments for addListener method |
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30 support for new record types seen from OS X |
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31 - IPv6 address |
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32 - hostinfo |
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33 ignore unknown DNS record types |
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34 fixes to name decoding |
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35 works alongside other processes using port 5353 (e.g. on Mac OS X) |
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36 tested against Mac OS X 10.3.2's mDNSResponder |
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37 corrections to removal of list entries for service browser""" |
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38 |
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39 """0.10 update - Jonathon Paisley contributed these corrections: |
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40 always multicast replies, even when query is unicast |
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41 correct a pointer encoding problem |
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42 can now write records in any order |
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43 traceback shown on failure |
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44 better TXT record parsing |
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45 server is now separate from name |
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46 can cancel a service browser |
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47 |
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48 modified some unit tests to accommodate these changes""" |
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49 |
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50 """0.09 update - remove all records on service unregistration |
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51 fix DOS security problem with readName""" |
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52 |
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53 """0.08 update - changed licensing to LGPL""" |
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54 |
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55 """0.07 update - faster shutdown on engine |
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56 pointer encoding of outgoing names |
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57 ServiceBrowser now works |
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58 new unit tests""" |
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59 |
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60 """0.06 update - small improvements with unit tests |
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61 added defined exception types |
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62 new style objects |
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63 fixed hostname/interface problem |
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64 fixed socket timeout problem |
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65 fixed addServiceListener() typo bug |
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66 using select() for socket reads |
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67 tested on Debian unstable with Python 2.2.2""" |
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68 |
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69 """0.05 update - ensure case insensitivity on domain names |
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70 support for unicast DNS queries""" |
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71 |
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72 """0.04 update - added some unit tests |
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73 added __ne__ adjuncts where required |
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74 ensure names end in '.local.' |
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75 timeout on receiving socket for clean shutdown""" |
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76 |
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77 __author__ = "Paul Scott-Murphy" |
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78 __email__ = "paul at scott dash murphy dot com" |
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79 __version__ = "0.12" |
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80 |
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81 import string |
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82 import time |
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83 import struct |
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84 import socket |
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85 import threading |
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86 import select |
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87 import traceback |
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88 |
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89 __all__ = ["Zeroconf", "ServiceInfo", "ServiceBrowser"] |
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90 |
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91 # hook for threads |
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92 |
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93 globals()['_GLOBAL_DONE'] = 0 |
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94 |
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95 # Some timing constants |
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96 |
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97 _UNREGISTER_TIME = 125 |
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98 _CHECK_TIME = 175 |
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99 _REGISTER_TIME = 225 |
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100 _LISTENER_TIME = 200 |
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101 _BROWSER_TIME = 500 |
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102 |
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103 # Some DNS constants |
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104 |
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105 _MDNS_ADDR = '224.0.0.251' |
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106 _MDNS_PORT = 5353; |
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107 _DNS_PORT = 53; |
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108 _DNS_TTL = 60 * 60; # one hour default TTL |
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109 |
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110 _MAX_MSG_TYPICAL = 1460 # unused |
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111 _MAX_MSG_ABSOLUTE = 8972 |
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112 |
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113 _FLAGS_QR_MASK = 0x8000 # query response mask |
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114 _FLAGS_QR_QUERY = 0x0000 # query |
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115 _FLAGS_QR_RESPONSE = 0x8000 # response |
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116 |
17476 | 117 _FLAGS_AA = 0x0400 # Authoritative answer |
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118 _FLAGS_TC = 0x0200 # Truncated |
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119 _FLAGS_RD = 0x0100 # Recursion desired |
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120 _FLAGS_RA = 0x8000 # Recursion available |
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121 |
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122 _FLAGS_Z = 0x0040 # Zero |
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123 _FLAGS_AD = 0x0020 # Authentic data |
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124 _FLAGS_CD = 0x0010 # Checking disabled |
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125 |
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126 _CLASS_IN = 1 |
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127 _CLASS_CS = 2 |
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128 _CLASS_CH = 3 |
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129 _CLASS_HS = 4 |
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130 _CLASS_NONE = 254 |
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131 _CLASS_ANY = 255 |
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132 _CLASS_MASK = 0x7FFF |
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133 _CLASS_UNIQUE = 0x8000 |
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134 |
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135 _TYPE_A = 1 |
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136 _TYPE_NS = 2 |
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137 _TYPE_MD = 3 |
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138 _TYPE_MF = 4 |
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139 _TYPE_CNAME = 5 |
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140 _TYPE_SOA = 6 |
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141 _TYPE_MB = 7 |
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142 _TYPE_MG = 8 |
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143 _TYPE_MR = 9 |
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144 _TYPE_NULL = 10 |
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145 _TYPE_WKS = 11 |
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146 _TYPE_PTR = 12 |
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147 _TYPE_HINFO = 13 |
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148 _TYPE_MINFO = 14 |
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149 _TYPE_MX = 15 |
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150 _TYPE_TXT = 16 |
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151 _TYPE_AAAA = 28 |
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152 _TYPE_SRV = 33 |
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153 _TYPE_ANY = 255 |
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154 |
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155 # Mapping constants to names |
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156 |
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157 _CLASSES = { _CLASS_IN : "in", |
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158 _CLASS_CS : "cs", |
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159 _CLASS_CH : "ch", |
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160 _CLASS_HS : "hs", |
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161 _CLASS_NONE : "none", |
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162 _CLASS_ANY : "any" } |
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163 |
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164 _TYPES = { _TYPE_A : "a", |
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165 _TYPE_NS : "ns", |
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166 _TYPE_MD : "md", |
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167 _TYPE_MF : "mf", |
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168 _TYPE_CNAME : "cname", |
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169 _TYPE_SOA : "soa", |
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170 _TYPE_MB : "mb", |
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171 _TYPE_MG : "mg", |
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172 _TYPE_MR : "mr", |
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173 _TYPE_NULL : "null", |
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174 _TYPE_WKS : "wks", |
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175 _TYPE_PTR : "ptr", |
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176 _TYPE_HINFO : "hinfo", |
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177 _TYPE_MINFO : "minfo", |
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178 _TYPE_MX : "mx", |
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179 _TYPE_TXT : "txt", |
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180 _TYPE_AAAA : "quada", |
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181 _TYPE_SRV : "srv", |
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182 _TYPE_ANY : "any" } |
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183 |
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184 # utility functions |
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185 |
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186 def currentTimeMillis(): |
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187 """Current system time in milliseconds""" |
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188 return time.time() * 1000 |
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189 |
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190 # Exceptions |
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191 |
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192 class NonLocalNameException(Exception): |
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193 pass |
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194 |
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195 class NonUniqueNameException(Exception): |
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196 pass |
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197 |
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198 class NamePartTooLongException(Exception): |
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199 pass |
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200 |
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201 class AbstractMethodException(Exception): |
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202 pass |
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203 |
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204 class BadTypeInNameException(Exception): |
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205 pass |
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206 |
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207 class BadDomainName(Exception): |
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208 def __init__(self, pos): |
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209 Exception.__init__(self, "at position %s" % pos) |
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210 |
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211 class BadDomainNameCircular(BadDomainName): |
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212 pass |
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213 |
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214 # implementation classes |
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215 |
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216 class DNSEntry(object): |
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217 """A DNS entry""" |
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218 |
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219 def __init__(self, name, type, clazz): |
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220 self.key = string.lower(name) |
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221 self.name = name |
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222 self.type = type |
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223 self.clazz = clazz & _CLASS_MASK |
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224 self.unique = (clazz & _CLASS_UNIQUE) != 0 |
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225 |
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226 def __eq__(self, other): |
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227 """Equality test on name, type, and class""" |
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228 if isinstance(other, DNSEntry): |
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229 return self.name == other.name and self.type == other.type and self.clazz == other.clazz |
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230 return 0 |
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231 |
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232 def __ne__(self, other): |
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233 """Non-equality test""" |
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234 return not self.__eq__(other) |
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235 |
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236 def getClazz(self, clazz): |
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237 """Class accessor""" |
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238 try: |
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239 return _CLASSES[clazz] |
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240 except KeyError: |
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241 return "?(%s)" % (clazz) |
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242 |
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243 def getType(self, type): |
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244 """Type accessor""" |
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245 try: |
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246 return _TYPES[type] |
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247 except KeyError: |
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248 return "?(%s)" % (type) |
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249 |
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250 def toString(self, hdr, other): |
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251 """String representation with additional information""" |
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252 result = "%s[%s,%s" % (hdr, self.getType(self.type), self.getClazz(self.clazz)) |
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253 if self.unique: |
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254 result += "-unique," |
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255 else: |
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256 result += "," |
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257 result += self.name |
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258 if other is not None: |
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259 result += ",%s]" % (other) |
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260 else: |
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261 result += "]" |
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262 return result |
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263 |
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264 class DNSQuestion(DNSEntry): |
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265 """A DNS question entry""" |
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266 |
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267 def __init__(self, name, type, clazz): |
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268 if not name.endswith(".local."): |
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269 raise NonLocalNameException(name) |
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270 DNSEntry.__init__(self, name, type, clazz) |
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271 |
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272 def answeredBy(self, rec): |
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273 """Returns true if the question is answered by the record""" |
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274 return self.clazz == rec.clazz and (self.type == rec.type or self.type == _TYPE_ANY) and self.name == rec.name |
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275 |
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276 def __repr__(self): |
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277 """String representation""" |
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278 return DNSEntry.toString(self, "question", None) |
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279 |
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280 |
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281 class DNSRecord(DNSEntry): |
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282 """A DNS record - like a DNS entry, but has a TTL""" |
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283 |
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284 def __init__(self, name, type, clazz, ttl): |
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285 DNSEntry.__init__(self, name, type, clazz) |
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286 self.ttl = ttl |
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287 self.created = currentTimeMillis() |
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288 |
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289 def __eq__(self, other): |
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290 """Tests equality as per DNSRecord""" |
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291 if isinstance(other, DNSRecord): |
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292 return DNSEntry.__eq__(self, other) |
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293 return 0 |
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294 |
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295 def suppressedBy(self, msg): |
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296 """Returns true if any answer in a message can suffice for the |
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297 information held in this record.""" |
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298 for record in msg.answers: |
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299 if self.suppressedByAnswer(record): |
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300 return 1 |
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301 return 0 |
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302 |
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303 def suppressedByAnswer(self, other): |
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304 """Returns true if another record has same name, type and class, |
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305 and if its TTL is at least half of this record's.""" |
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306 if self == other and other.ttl > (self.ttl / 2): |
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307 return 1 |
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308 return 0 |
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309 |
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310 def getExpirationTime(self, percent): |
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311 """Returns the time at which this record will have expired |
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312 by a certain percentage.""" |
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313 return self.created + (percent * self.ttl * 10) |
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314 |
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315 def getRemainingTTL(self, now): |
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316 """Returns the remaining TTL in seconds.""" |
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317 return max(0, (self.getExpirationTime(100) - now) / 1000) |
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318 |
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319 def isExpired(self, now): |
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320 """Returns true if this record has expired.""" |
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321 return self.getExpirationTime(100) <= now |
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322 |
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323 def isStale(self, now): |
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324 """Returns true if this record is at least half way expired.""" |
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325 return self.getExpirationTime(50) <= now |
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326 |
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327 def resetTTL(self, other): |
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328 """Sets this record's TTL and created time to that of |
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329 another record.""" |
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330 self.created = other.created |
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331 self.ttl = other.ttl |
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332 |
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333 def write(self, out): |
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334 """Abstract method""" |
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335 raise AbstractMethodException |
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336 |
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337 def toString(self, other): |
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338 """String representation with additional information""" |
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339 arg = "%s/%s,%s" % (self.ttl, self.getRemainingTTL(currentTimeMillis()), other) |
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340 return DNSEntry.toString(self, "record", arg) |
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341 |
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342 class DNSAddress(DNSRecord): |
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343 """A DNS address record""" |
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344 |
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345 def __init__(self, name, type, clazz, ttl, address): |
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346 DNSRecord.__init__(self, name, type, clazz, ttl) |
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347 self.address = address |
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348 |
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349 def write(self, out): |
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350 """Used in constructing an outgoing packet""" |
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351 out.writeString(self.address, len(self.address)) |
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352 |
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353 def __eq__(self, other): |
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354 """Tests equality on address""" |
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355 if isinstance(other, DNSAddress): |
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356 return self.address == other.address |
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357 return 0 |
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358 |
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359 def __repr__(self): |
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360 """String representation""" |
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361 try: |
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362 return socket.inet_ntoa(self.address) |
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363 except Exception: |
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364 return self.address |
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365 |
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366 class DNSHinfo(DNSRecord): |
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367 """A DNS host information record""" |
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368 |
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369 def __init__(self, name, type, clazz, ttl, cpu, os): |
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370 DNSRecord.__init__(self, name, type, clazz, ttl) |
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371 self.cpu = cpu |
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372 self.os = os |
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373 |
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374 def write(self, out): |
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375 """Used in constructing an outgoing packet""" |
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376 out.writeString(self.cpu, len(self.cpu)) |
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377 out.writeString(self.os, len(self.os)) |
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378 |
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379 def __eq__(self, other): |
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380 """Tests equality on cpu and os""" |
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381 if isinstance(other, DNSHinfo): |
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382 return self.cpu == other.cpu and self.os == other.os |
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383 return 0 |
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384 |
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385 def __repr__(self): |
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386 """String representation""" |
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387 return self.cpu + " " + self.os |
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388 |
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389 class DNSPointer(DNSRecord): |
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390 """A DNS pointer record""" |
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391 |
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392 def __init__(self, name, type, clazz, ttl, alias): |
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393 DNSRecord.__init__(self, name, type, clazz, ttl) |
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394 self.alias = alias |
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395 |
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396 def write(self, out): |
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397 """Used in constructing an outgoing packet""" |
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398 out.writeName(self.alias) |
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399 |
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400 def __eq__(self, other): |
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401 """Tests equality on alias""" |
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402 if isinstance(other, DNSPointer): |
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403 return self.alias == other.alias |
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404 return 0 |
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405 |
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406 def __repr__(self): |
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407 """String representation""" |
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408 return self.toString(self.alias) |
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409 |
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410 class DNSText(DNSRecord): |
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411 """A DNS text record""" |
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412 |
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413 def __init__(self, name, type, clazz, ttl, text): |
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414 DNSRecord.__init__(self, name, type, clazz, ttl) |
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415 self.text = text |
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416 |
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417 def write(self, out): |
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418 """Used in constructing an outgoing packet""" |
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419 out.writeString(self.text, len(self.text)) |
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420 |
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421 def __eq__(self, other): |
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422 """Tests equality on text""" |
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423 if isinstance(other, DNSText): |
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424 return self.text == other.text |
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425 return 0 |
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426 |
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427 def __repr__(self): |
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428 """String representation""" |
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429 if len(self.text) > 10: |
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430 return self.toString(self.text[:7] + "...") |
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431 else: |
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432 return self.toString(self.text) |
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433 |
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434 class DNSService(DNSRecord): |
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435 """A DNS service record""" |
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436 |
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437 def __init__(self, name, type, clazz, ttl, priority, weight, port, server): |
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438 DNSRecord.__init__(self, name, type, clazz, ttl) |
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439 self.priority = priority |
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440 self.weight = weight |
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441 self.port = port |
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442 self.server = server |
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443 |
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444 def write(self, out): |
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445 """Used in constructing an outgoing packet""" |
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446 out.writeShort(self.priority) |
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447 out.writeShort(self.weight) |
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448 out.writeShort(self.port) |
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449 out.writeName(self.server) |
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450 |
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451 def __eq__(self, other): |
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452 """Tests equality on priority, weight, port and server""" |
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453 if isinstance(other, DNSService): |
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454 return self.priority == other.priority and self.weight == other.weight and self.port == other.port and self.server == other.server |
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455 return 0 |
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456 |
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457 def __repr__(self): |
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458 """String representation""" |
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459 return self.toString("%s:%s" % (self.server, self.port)) |
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460 |
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461 class DNSIncoming(object): |
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462 """Object representation of an incoming DNS packet""" |
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463 |
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464 def __init__(self, data): |
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465 """Constructor from string holding bytes of packet""" |
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466 self.offset = 0 |
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467 self.data = data |
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468 self.questions = [] |
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469 self.answers = [] |
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470 self.numQuestions = 0 |
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471 self.numAnswers = 0 |
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472 self.numAuthorities = 0 |
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473 self.numAdditionals = 0 |
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474 |
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475 self.readHeader() |
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476 self.readQuestions() |
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477 self.readOthers() |
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478 |
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479 def readHeader(self): |
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480 """Reads header portion of packet""" |
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481 format = '!HHHHHH' |
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482 length = struct.calcsize(format) |
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483 info = struct.unpack(format, self.data[self.offset:self.offset+length]) |
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484 self.offset += length |
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485 |
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486 self.id = info[0] |
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487 self.flags = info[1] |
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488 self.numQuestions = info[2] |
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489 self.numAnswers = info[3] |
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490 self.numAuthorities = info[4] |
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491 self.numAdditionals = info[5] |
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492 |
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493 def readQuestions(self): |
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494 """Reads questions section of packet""" |
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495 format = '!HH' |
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496 length = struct.calcsize(format) |
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497 for i in range(0, self.numQuestions): |
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498 name = self.readName() |
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499 info = struct.unpack(format, self.data[self.offset:self.offset+length]) |
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500 self.offset += length |
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501 |
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502 try: |
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503 question = DNSQuestion(name, info[0], info[1]) |
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504 self.questions.append(question) |
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505 except NonLocalNameException: |
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506 pass |
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507 |
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508 def readInt(self): |
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509 """Reads an integer from the packet""" |
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510 format = '!I' |
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511 length = struct.calcsize(format) |
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512 info = struct.unpack(format, self.data[self.offset:self.offset+length]) |
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513 self.offset += length |
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514 return info[0] |
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515 |
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516 def readCharacterString(self): |
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517 """Reads a character string from the packet""" |
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518 length = ord(self.data[self.offset]) |
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519 self.offset += 1 |
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520 return self.readString(length) |
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521 |
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522 def readString(self, len): |
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523 """Reads a string of a given length from the packet""" |
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524 format = '!' + str(len) + 's' |
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525 length = struct.calcsize(format) |
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526 info = struct.unpack(format, self.data[self.offset:self.offset+length]) |
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527 self.offset += length |
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528 return info[0] |
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529 |
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530 def readUnsignedShort(self): |
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531 """Reads an unsigned short from the packet""" |
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532 format = '!H' |
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533 length = struct.calcsize(format) |
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534 info = struct.unpack(format, self.data[self.offset:self.offset+length]) |
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535 self.offset += length |
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536 return info[0] |
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|
537 |
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538 def readOthers(self): |
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|
539 """Reads the answers, authorities and additionals section of the packet""" |
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|
540 format = '!HHiH' |
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541 length = struct.calcsize(format) |
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542 n = self.numAnswers + self.numAuthorities + self.numAdditionals |
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543 for i in range(0, n): |
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544 domain = self.readName() |
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545 info = struct.unpack(format, self.data[self.offset:self.offset+length]) |
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546 self.offset += length |
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547 |
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548 rec = None |
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549 if info[0] == _TYPE_A: |
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550 rec = DNSAddress(domain, info[0], info[1], info[2], self.readString(4)) |
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551 elif info[0] == _TYPE_CNAME or info[0] == _TYPE_PTR: |
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552 rec = DNSPointer(domain, info[0], info[1], info[2], self.readName()) |
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553 elif info[0] == _TYPE_TXT: |
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|
554 rec = DNSText(domain, info[0], info[1], info[2], self.readString(info[3])) |
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555 elif info[0] == _TYPE_SRV: |
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556 rec = DNSService(domain, info[0], info[1], info[2], self.readUnsignedShort(), self.readUnsignedShort(), self.readUnsignedShort(), self.readName()) |
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557 elif info[0] == _TYPE_HINFO: |
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558 rec = DNSHinfo(domain, info[0], info[1], info[2], self.readCharacterString(), self.readCharacterString()) |
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559 elif info[0] == _TYPE_AAAA: |
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560 rec = DNSAddress(domain, info[0], info[1], info[2], self.readString(16)) |
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561 else: |
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562 # Try to ignore types we don't know about |
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563 # this may mean the rest of the name is |
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564 # unable to be parsed, and may show errors |
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565 # so this is left for debugging. New types |
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566 # encountered need to be parsed properly. |
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567 # |
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568 #print "UNKNOWN TYPE = " + str(info[0]) |
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parents:
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|
569 #raise BadTypeInNameException |
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Brendan Cully <brendan@kublai.com>
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570 self.offset += info[3] |
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571 |
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572 if rec is not None: |
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573 self.answers.append(rec) |
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574 |
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575 def isQuery(self): |
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576 """Returns true if this is a query""" |
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577 return (self.flags & _FLAGS_QR_MASK) == _FLAGS_QR_QUERY |
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578 |
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579 def isResponse(self): |
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|
580 """Returns true if this is a response""" |
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parents:
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|
581 return (self.flags & _FLAGS_QR_MASK) == _FLAGS_QR_RESPONSE |
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582 |
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583 def readUTF(self, offset, len): |
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parents:
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|
584 """Reads a UTF-8 string of a given length from the packet""" |
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585 return self.data[offset:offset+len].decode('utf-8') |
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586 |
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587 def readName(self): |
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|
588 """Reads a domain name from the packet""" |
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589 result = '' |
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590 off = self.offset |
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parents:
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591 next = -1 |
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parents:
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592 first = off |
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parents:
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|
593 |
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Martin Geisler <mg@lazybytes.net>
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594 while True: |
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595 len = ord(self.data[off]) |
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596 off += 1 |
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parents:
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|
597 if len == 0: |
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parents:
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|
598 break |
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parents:
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|
599 t = len & 0xC0 |
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|
600 if t == 0x00: |
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|
601 result = ''.join((result, self.readUTF(off, len) + '.')) |
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parents:
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|
602 off += len |
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parents:
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|
603 elif t == 0xC0: |
643c751e60b2
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|
604 if next < 0: |
643c751e60b2
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|
605 next = off + 1 |
643c751e60b2
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|
606 off = ((len & 0x3F) << 8) | ord(self.data[off]) |
643c751e60b2
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parents:
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changeset
|
607 if off >= first: |
11435
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parents:
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diff
changeset
|
608 raise BadDomainNameCircular(off) |
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parents:
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changeset
|
609 first = off |
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parents:
diff
changeset
|
610 else: |
11435
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parents:
10514
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changeset
|
611 raise BadDomainName(off) |
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parents:
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|
612 |
643c751e60b2
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|
613 if next >= 0: |
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parents:
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changeset
|
614 self.offset = next |
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|
615 else: |
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616 self.offset = off |
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|
617 |
643c751e60b2
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618 return result |
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|
619 |
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620 |
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|
621 class DNSOutgoing(object): |
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parents:
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|
622 """Object representation of an outgoing packet""" |
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623 |
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624 def __init__(self, flags, multicast = 1): |
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|
625 self.finished = 0 |
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|
626 self.id = 0 |
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|
627 self.multicast = multicast |
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|
628 self.flags = flags |
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parents:
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|
629 self.names = {} |
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|
630 self.data = [] |
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|
631 self.size = 12 |
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|
632 |
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|
633 self.questions = [] |
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|
634 self.answers = [] |
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|
635 self.authorities = [] |
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changeset
|
636 self.additionals = [] |
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|
637 |
643c751e60b2
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|
638 def addQuestion(self, record): |
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changeset
|
639 """Adds a question""" |
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|
640 self.questions.append(record) |
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|
641 |
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parents:
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|
642 def addAnswer(self, inp, record): |
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parents:
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|
643 """Adds an answer""" |
643c751e60b2
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parents:
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|
644 if not record.suppressedBy(inp): |
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parents:
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|
645 self.addAnswerAtTime(record, 0) |
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parents:
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|
646 |
643c751e60b2
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parents:
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|
647 def addAnswerAtTime(self, record, now): |
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parents:
diff
changeset
|
648 """Adds an answer if if does not expire by a certain time""" |
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parents:
diff
changeset
|
649 if record is not None: |
643c751e60b2
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parents:
diff
changeset
|
650 if now == 0 or not record.isExpired(now): |
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parents:
diff
changeset
|
651 self.answers.append((record, now)) |
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parents:
diff
changeset
|
652 |
17476 | 653 def addAuthoritativeAnswer(self, record): |
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parents:
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|
654 """Adds an authoritative answer""" |
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Matt Mackall <mpm@selenic.com>
parents:
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|
655 self.authorities.append(record) |
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diff
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|
656 |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
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|
657 def addAdditionalAnswer(self, record): |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
658 """Adds an additional answer""" |
643c751e60b2
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parents:
diff
changeset
|
659 self.additionals.append(record) |
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Matt Mackall <mpm@selenic.com>
parents:
diff
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|
660 |
643c751e60b2
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parents:
diff
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|
661 def writeByte(self, value): |
643c751e60b2
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parents:
diff
changeset
|
662 """Writes a single byte to the packet""" |
643c751e60b2
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parents:
diff
changeset
|
663 format = '!c' |
643c751e60b2
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parents:
diff
changeset
|
664 self.data.append(struct.pack(format, chr(value))) |
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parents:
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changeset
|
665 self.size += 1 |
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parents:
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|
666 |
643c751e60b2
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parents:
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|
667 def insertShort(self, index, value): |
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parents:
diff
changeset
|
668 """Inserts an unsigned short in a certain position in the packet""" |
643c751e60b2
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parents:
diff
changeset
|
669 format = '!H' |
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parents:
diff
changeset
|
670 self.data.insert(index, struct.pack(format, value)) |
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parents:
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changeset
|
671 self.size += 2 |
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|
672 |
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|
673 def writeShort(self, value): |
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parents:
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|
674 """Writes an unsigned short to the packet""" |
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parents:
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|
675 format = '!H' |
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parents:
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|
676 self.data.append(struct.pack(format, value)) |
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|
677 self.size += 2 |
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parents:
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|
678 |
643c751e60b2
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parents:
diff
changeset
|
679 def writeInt(self, value): |
643c751e60b2
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parents:
diff
changeset
|
680 """Writes an unsigned integer to the packet""" |
643c751e60b2
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parents:
diff
changeset
|
681 format = '!I' |
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parents:
diff
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|
682 self.data.append(struct.pack(format, int(value))) |
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parents:
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changeset
|
683 self.size += 4 |
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parents:
diff
changeset
|
684 |
643c751e60b2
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parents:
diff
changeset
|
685 def writeString(self, value, length): |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
686 """Writes a string to the packet""" |
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parents:
diff
changeset
|
687 format = '!' + str(length) + 's' |
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parents:
diff
changeset
|
688 self.data.append(struct.pack(format, value)) |
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parents:
diff
changeset
|
689 self.size += length |
643c751e60b2
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parents:
diff
changeset
|
690 |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
691 def writeUTF(self, s): |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
692 """Writes a UTF-8 string of a given length to the packet""" |
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parents:
diff
changeset
|
693 utfstr = s.encode('utf-8') |
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parents:
diff
changeset
|
694 length = len(utfstr) |
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parents:
diff
changeset
|
695 if length > 64: |
643c751e60b2
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parents:
diff
changeset
|
696 raise NamePartTooLongException |
643c751e60b2
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parents:
diff
changeset
|
697 self.writeByte(length) |
643c751e60b2
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parents:
diff
changeset
|
698 self.writeString(utfstr, length) |
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parents:
diff
changeset
|
699 |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
700 def writeName(self, name): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
701 """Writes a domain name to the packet""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
702 |
643c751e60b2
zeroconf: initial implementation
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parents:
diff
changeset
|
703 try: |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
704 # Find existing instance of this name in packet |
643c751e60b2
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parents:
diff
changeset
|
705 # |
643c751e60b2
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parents:
diff
changeset
|
706 index = self.names[name] |
643c751e60b2
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parents:
diff
changeset
|
707 except KeyError: |
643c751e60b2
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parents:
diff
changeset
|
708 # No record of this name already, so write it |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
709 # out as normal, recording the location of the name |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
710 # for future pointers to it. |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
711 # |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
712 self.names[name] = self.size |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
713 parts = name.split('.') |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
714 if parts[-1] == '': |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
715 parts = parts[:-1] |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
716 for part in parts: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
717 self.writeUTF(part) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
718 self.writeByte(0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
719 return |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
720 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
721 # An index was found, so write a pointer to it |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
722 # |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
723 self.writeByte((index >> 8) | 0xC0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
724 self.writeByte(index) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
725 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
726 def writeQuestion(self, question): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
727 """Writes a question to the packet""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
728 self.writeName(question.name) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
729 self.writeShort(question.type) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
730 self.writeShort(question.clazz) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
731 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
732 def writeRecord(self, record, now): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
733 """Writes a record (answer, authoritative answer, additional) to |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
734 the packet""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
735 self.writeName(record.name) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
736 self.writeShort(record.type) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
737 if record.unique and self.multicast: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
738 self.writeShort(record.clazz | _CLASS_UNIQUE) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
739 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
740 self.writeShort(record.clazz) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
741 if now == 0: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
742 self.writeInt(record.ttl) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
743 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
744 self.writeInt(record.getRemainingTTL(now)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
745 index = len(self.data) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
746 # Adjust size for the short we will write before this record |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
747 # |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
748 self.size += 2 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
749 record.write(self) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
750 self.size -= 2 |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
751 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
752 length = len(''.join(self.data[index:])) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
753 self.insertShort(index, length) # Here is the short we adjusted for |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
754 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
755 def packet(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
756 """Returns a string containing the packet's bytes |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
757 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
758 No further parts should be added to the packet once this |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
759 is done.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
760 if not self.finished: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
761 self.finished = 1 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
762 for question in self.questions: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
763 self.writeQuestion(question) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
764 for answer, time in self.answers: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
765 self.writeRecord(answer, time) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
766 for authority in self.authorities: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
767 self.writeRecord(authority, 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
768 for additional in self.additionals: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
769 self.writeRecord(additional, 0) |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
770 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
771 self.insertShort(0, len(self.additionals)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
772 self.insertShort(0, len(self.authorities)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
773 self.insertShort(0, len(self.answers)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
774 self.insertShort(0, len(self.questions)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
775 self.insertShort(0, self.flags) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
776 if self.multicast: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
777 self.insertShort(0, 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
778 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
779 self.insertShort(0, self.id) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
780 return ''.join(self.data) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
781 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
782 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
783 class DNSCache(object): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
784 """A cache of DNS entries""" |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
785 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
786 def __init__(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
787 self.cache = {} |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
788 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
789 def add(self, entry): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
790 """Adds an entry""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
791 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
792 list = self.cache[entry.key] |
13930
0b7853aee5ae
zeroconf: clean up naked exceptions
Matt Mackall <mpm@selenic.com>
parents:
11435
diff
changeset
|
793 except KeyError: |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
794 list = self.cache[entry.key] = [] |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
795 list.append(entry) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
796 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
797 def remove(self, entry): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
798 """Removes an entry""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
799 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
800 list = self.cache[entry.key] |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
801 list.remove(entry) |
13930
0b7853aee5ae
zeroconf: clean up naked exceptions
Matt Mackall <mpm@selenic.com>
parents:
11435
diff
changeset
|
802 except KeyError: |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
803 pass |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
804 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
805 def get(self, entry): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
806 """Gets an entry by key. Will return None if there is no |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
807 matching entry.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
808 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
809 list = self.cache[entry.key] |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
810 return list[list.index(entry)] |
14063
87ebf72878ed
Zeroconf: catch both ValueError and KeyError in get()
Augie Fackler <durin42@gmail.com>
parents:
13930
diff
changeset
|
811 except (KeyError, ValueError): |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
812 return None |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
813 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
814 def getByDetails(self, name, type, clazz): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
815 """Gets an entry by details. Will return None if there is |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
816 no matching entry.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
817 entry = DNSEntry(name, type, clazz) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
818 return self.get(entry) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
819 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
820 def entriesWithName(self, name): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
821 """Returns a list of entries whose key matches the name.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
822 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
823 return self.cache[name] |
13930
0b7853aee5ae
zeroconf: clean up naked exceptions
Matt Mackall <mpm@selenic.com>
parents:
11435
diff
changeset
|
824 except KeyError: |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
825 return [] |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
826 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
827 def entries(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
828 """Returns a list of all entries""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
829 def add(x, y): return x+y |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
830 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
831 return reduce(add, self.cache.values()) |
13930
0b7853aee5ae
zeroconf: clean up naked exceptions
Matt Mackall <mpm@selenic.com>
parents:
11435
diff
changeset
|
832 except Exception: |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
833 return [] |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
834 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
835 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
836 class Engine(threading.Thread): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
837 """An engine wraps read access to sockets, allowing objects that |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
838 need to receive data from sockets to be called back when the |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
839 sockets are ready. |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
840 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
841 A reader needs a handle_read() method, which is called when the socket |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
842 it is interested in is ready for reading. |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
843 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
844 Writers are not implemented here, because we only send short |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
845 packets. |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
846 """ |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
847 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
848 def __init__(self, zeroconf): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
849 threading.Thread.__init__(self) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
850 self.zeroconf = zeroconf |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
851 self.readers = {} # maps socket to reader |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
852 self.timeout = 5 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
853 self.condition = threading.Condition() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
854 self.start() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
855 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
856 def run(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
857 while not globals()['_GLOBAL_DONE']: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
858 rs = self.getReaders() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
859 if len(rs) == 0: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
860 # No sockets to manage, but we wait for the timeout |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
861 # or addition of a socket |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
862 # |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
863 self.condition.acquire() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
864 self.condition.wait(self.timeout) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
865 self.condition.release() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
866 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
867 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
868 rr, wr, er = select.select(rs, [], [], self.timeout) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
869 for socket in rr: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
870 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
871 self.readers[socket].handle_read() |
13930
0b7853aee5ae
zeroconf: clean up naked exceptions
Matt Mackall <mpm@selenic.com>
parents:
11435
diff
changeset
|
872 except Exception: |
10514
1426b4807fc8
zeroconf: suppress traceback during shutdown
Brendan Cully <brendan@kublai.com>
parents:
10387
diff
changeset
|
873 if not globals()['_GLOBAL_DONE']: |
1426b4807fc8
zeroconf: suppress traceback during shutdown
Brendan Cully <brendan@kublai.com>
parents:
10387
diff
changeset
|
874 traceback.print_exc() |
13930
0b7853aee5ae
zeroconf: clean up naked exceptions
Matt Mackall <mpm@selenic.com>
parents:
11435
diff
changeset
|
875 except Exception: |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
876 pass |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
877 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
878 def getReaders(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
879 self.condition.acquire() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
880 result = self.readers.keys() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
881 self.condition.release() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
882 return result |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
883 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
884 def addReader(self, reader, socket): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
885 self.condition.acquire() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
886 self.readers[socket] = reader |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
887 self.condition.notify() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
888 self.condition.release() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
889 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
890 def delReader(self, socket): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
891 self.condition.acquire() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
892 del(self.readers[socket]) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
893 self.condition.notify() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
894 self.condition.release() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
895 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
896 def notify(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
897 self.condition.acquire() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
898 self.condition.notify() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
899 self.condition.release() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
900 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
901 class Listener(object): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
902 """A Listener is used by this module to listen on the multicast |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
903 group to which DNS messages are sent, allowing the implementation |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
904 to cache information as it arrives. |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
905 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
906 It requires registration with an Engine object in order to have |
17424
e7cfe3587ea4
fix trivial spelling errors
Mads Kiilerich <mads@kiilerich.com>
parents:
15782
diff
changeset
|
907 the read() method called when a socket is available for reading.""" |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
908 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
909 def __init__(self, zeroconf): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
910 self.zeroconf = zeroconf |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
911 self.zeroconf.engine.addReader(self, self.zeroconf.socket) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
912 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
913 def handle_read(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
914 data, (addr, port) = self.zeroconf.socket.recvfrom(_MAX_MSG_ABSOLUTE) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
915 self.data = data |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
916 msg = DNSIncoming(data) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
917 if msg.isQuery(): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
918 # Always multicast responses |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
919 # |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
920 if port == _MDNS_PORT: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
921 self.zeroconf.handleQuery(msg, _MDNS_ADDR, _MDNS_PORT) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
922 # If it's not a multicast query, reply via unicast |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
923 # and multicast |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
924 # |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
925 elif port == _DNS_PORT: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
926 self.zeroconf.handleQuery(msg, addr, port) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
927 self.zeroconf.handleQuery(msg, _MDNS_ADDR, _MDNS_PORT) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
928 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
929 self.zeroconf.handleResponse(msg) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
930 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
931 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
932 class Reaper(threading.Thread): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
933 """A Reaper is used by this module to remove cache entries that |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
934 have expired.""" |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
935 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
936 def __init__(self, zeroconf): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
937 threading.Thread.__init__(self) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
938 self.zeroconf = zeroconf |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
939 self.start() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
940 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
941 def run(self): |
14494
1ffeeb91c55d
check-code: flag 0/1 used as constant Boolean expression
Martin Geisler <mg@lazybytes.net>
parents:
14063
diff
changeset
|
942 while True: |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
943 self.zeroconf.wait(10 * 1000) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
944 if globals()['_GLOBAL_DONE']: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
945 return |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
946 now = currentTimeMillis() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
947 for record in self.zeroconf.cache.entries(): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
948 if record.isExpired(now): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
949 self.zeroconf.updateRecord(now, record) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
950 self.zeroconf.cache.remove(record) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
951 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
952 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
953 class ServiceBrowser(threading.Thread): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
954 """Used to browse for a service of a specific type. |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
955 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
956 The listener object will have its addService() and |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
957 removeService() methods called when this browser |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
958 discovers changes in the services availability.""" |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
959 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
960 def __init__(self, zeroconf, type, listener): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
961 """Creates a browser for a specific type""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
962 threading.Thread.__init__(self) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
963 self.zeroconf = zeroconf |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
964 self.type = type |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
965 self.listener = listener |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
966 self.services = {} |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
967 self.nextTime = currentTimeMillis() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
968 self.delay = _BROWSER_TIME |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
969 self.list = [] |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
970 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
971 self.done = 0 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
972 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
973 self.zeroconf.addListener(self, DNSQuestion(self.type, _TYPE_PTR, _CLASS_IN)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
974 self.start() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
975 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
976 def updateRecord(self, zeroconf, now, record): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
977 """Callback invoked by Zeroconf when new information arrives. |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
978 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
979 Updates information required by browser in the Zeroconf cache.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
980 if record.type == _TYPE_PTR and record.name == self.type: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
981 expired = record.isExpired(now) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
982 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
983 oldrecord = self.services[record.alias.lower()] |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
984 if not expired: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
985 oldrecord.resetTTL(record) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
986 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
987 del(self.services[record.alias.lower()]) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
988 callback = lambda x: self.listener.removeService(x, self.type, record.alias) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
989 self.list.append(callback) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
990 return |
13930
0b7853aee5ae
zeroconf: clean up naked exceptions
Matt Mackall <mpm@selenic.com>
parents:
11435
diff
changeset
|
991 except Exception: |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
992 if not expired: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
993 self.services[record.alias.lower()] = record |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
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994 callback = lambda x: self.listener.addService(x, self.type, record.alias) |
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parents:
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|
995 self.list.append(callback) |
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Matt Mackall <mpm@selenic.com>
parents:
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changeset
|
996 |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
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changeset
|
997 expires = record.getExpirationTime(75) |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
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|
998 if expires < self.nextTime: |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
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changeset
|
999 self.nextTime = expires |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1000 |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1001 def cancel(self): |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1002 self.done = 1 |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1003 self.zeroconf.notifyAll() |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1004 |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1005 def run(self): |
14494
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check-code: flag 0/1 used as constant Boolean expression
Martin Geisler <mg@lazybytes.net>
parents:
14063
diff
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|
1006 while True: |
7071
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Matt Mackall <mpm@selenic.com>
parents:
diff
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|
1007 event = None |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1008 now = currentTimeMillis() |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1009 if len(self.list) == 0 and self.nextTime > now: |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1010 self.zeroconf.wait(self.nextTime - now) |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1011 if globals()['_GLOBAL_DONE'] or self.done: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1012 return |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1013 now = currentTimeMillis() |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1014 |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1015 if self.nextTime <= now: |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1016 out = DNSOutgoing(_FLAGS_QR_QUERY) |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1017 out.addQuestion(DNSQuestion(self.type, _TYPE_PTR, _CLASS_IN)) |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1018 for record in self.services.values(): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1019 if not record.isExpired(now): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1020 out.addAnswerAtTime(record, now) |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1021 self.zeroconf.send(out) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1022 self.nextTime = now + self.delay |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1023 self.delay = min(20 * 1000, self.delay * 2) |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1024 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1025 if len(self.list) > 0: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1026 event = self.list.pop(0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1027 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1028 if event is not None: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1029 event(self.zeroconf) |
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cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
1030 |
7071
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1031 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1032 class ServiceInfo(object): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1033 """Service information""" |
7877
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cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
1034 |
7071
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1035 def __init__(self, type, name, address=None, port=None, weight=0, priority=0, properties=None, server=None): |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1036 """Create a service description. |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1037 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1038 type: fully qualified service type name |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1039 name: fully qualified service name |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1040 address: IP address as unsigned short, network byte order |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1041 port: port that the service runs on |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1042 weight: weight of the service |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1043 priority: priority of the service |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1044 properties: dictionary of properties (or a string holding the bytes for the text field) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1045 server: fully qualified name for service host (defaults to name)""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1046 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1047 if not name.endswith(type): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1048 raise BadTypeInNameException |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1049 self.type = type |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1050 self.name = name |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1051 self.address = address |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1052 self.port = port |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1053 self.weight = weight |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1054 self.priority = priority |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1055 if server: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1056 self.server = server |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1057 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1058 self.server = name |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1059 self.setProperties(properties) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1060 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1061 def setProperties(self, properties): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1062 """Sets properties and text of this info from a dictionary""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1063 if isinstance(properties, dict): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1064 self.properties = properties |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1065 list = [] |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1066 result = '' |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1067 for key in properties: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1068 value = properties[key] |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1069 if value is None: |
10343
b8e3aeb7542c
zeroconf: do not try to encode encoded strings (issue1942)
Henrik Stuart <hg@hstuart.dk>
parents:
10288
diff
changeset
|
1070 suffix = '' |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1071 elif isinstance(value, str): |
10343
b8e3aeb7542c
zeroconf: do not try to encode encoded strings (issue1942)
Henrik Stuart <hg@hstuart.dk>
parents:
10288
diff
changeset
|
1072 suffix = value |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1073 elif isinstance(value, int): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1074 if value: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1075 suffix = 'true' |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1076 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1077 suffix = 'false' |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1078 else: |
10343
b8e3aeb7542c
zeroconf: do not try to encode encoded strings (issue1942)
Henrik Stuart <hg@hstuart.dk>
parents:
10288
diff
changeset
|
1079 suffix = '' |
7071
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1080 list.append('='.join((key, suffix))) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1081 for item in list: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1082 result = ''.join((result, struct.pack('!c', chr(len(item))), item)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1083 self.text = result |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1084 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1085 self.text = properties |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1086 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1087 def setText(self, text): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1088 """Sets properties and text given a text field""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1089 self.text = text |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1090 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1091 result = {} |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1092 end = len(text) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1093 index = 0 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1094 strs = [] |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1095 while index < end: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1096 length = ord(text[index]) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1097 index += 1 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1098 strs.append(text[index:index+length]) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1099 index += length |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
1100 |
7071
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1101 for s in strs: |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1102 eindex = s.find('=') |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1103 if eindex == -1: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1104 # No equals sign at all |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1105 key = s |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1106 value = 0 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1107 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1108 key = s[:eindex] |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1109 value = s[eindex+1:] |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1110 if value == 'true': |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1111 value = 1 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1112 elif value == 'false' or not value: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1113 value = 0 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1114 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1115 # Only update non-existent properties |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1116 if key and result.get(key) == None: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1117 result[key] = value |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1118 |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1119 self.properties = result |
13930
0b7853aee5ae
zeroconf: clean up naked exceptions
Matt Mackall <mpm@selenic.com>
parents:
11435
diff
changeset
|
1120 except Exception: |
7071
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1121 traceback.print_exc() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1122 self.properties = None |
7877
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cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
1123 |
7071
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1124 def getType(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1125 """Type accessor""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1126 return self.type |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1127 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1128 def getName(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1129 """Name accessor""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1130 if self.type is not None and self.name.endswith("." + self.type): |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1131 return self.name[:len(self.name) - len(self.type) - 1] |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1132 return self.name |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1133 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1134 def getAddress(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1135 """Address accessor""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1136 return self.address |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1137 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1138 def getPort(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1139 """Port accessor""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1140 return self.port |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1141 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1142 def getPriority(self): |
17424
e7cfe3587ea4
fix trivial spelling errors
Mads Kiilerich <mads@kiilerich.com>
parents:
15782
diff
changeset
|
1143 """Priority accessor""" |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1144 return self.priority |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1145 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1146 def getWeight(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1147 """Weight accessor""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1148 return self.weight |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1149 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1150 def getProperties(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1151 """Properties accessor""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1152 return self.properties |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1153 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1154 def getText(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1155 """Text accessor""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1156 return self.text |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1157 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1158 def getServer(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1159 """Server accessor""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1160 return self.server |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1161 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1162 def updateRecord(self, zeroconf, now, record): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1163 """Updates service information from a DNS record""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1164 if record is not None and not record.isExpired(now): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1165 if record.type == _TYPE_A: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1166 #if record.name == self.name: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1167 if record.name == self.server: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1168 self.address = record.address |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1169 elif record.type == _TYPE_SRV: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1170 if record.name == self.name: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1171 self.server = record.server |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1172 self.port = record.port |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1173 self.weight = record.weight |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1174 self.priority = record.priority |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1175 #self.address = None |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1176 self.updateRecord(zeroconf, now, zeroconf.cache.getByDetails(self.server, _TYPE_A, _CLASS_IN)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1177 elif record.type == _TYPE_TXT: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1178 if record.name == self.name: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1179 self.setText(record.text) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1180 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1181 def request(self, zeroconf, timeout): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1182 """Returns true if the service could be discovered on the |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1183 network, and updates this object with details discovered. |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1184 """ |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1185 now = currentTimeMillis() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1186 delay = _LISTENER_TIME |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1187 next = now + delay |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1188 last = now + timeout |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1189 result = 0 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1190 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1191 zeroconf.addListener(self, DNSQuestion(self.name, _TYPE_ANY, _CLASS_IN)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1192 while self.server is None or self.address is None or self.text is None: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1193 if last <= now: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1194 return 0 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1195 if next <= now: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1196 out = DNSOutgoing(_FLAGS_QR_QUERY) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1197 out.addQuestion(DNSQuestion(self.name, _TYPE_SRV, _CLASS_IN)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1198 out.addAnswerAtTime(zeroconf.cache.getByDetails(self.name, _TYPE_SRV, _CLASS_IN), now) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1199 out.addQuestion(DNSQuestion(self.name, _TYPE_TXT, _CLASS_IN)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1200 out.addAnswerAtTime(zeroconf.cache.getByDetails(self.name, _TYPE_TXT, _CLASS_IN), now) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1201 if self.server is not None: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1202 out.addQuestion(DNSQuestion(self.server, _TYPE_A, _CLASS_IN)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1203 out.addAnswerAtTime(zeroconf.cache.getByDetails(self.server, _TYPE_A, _CLASS_IN), now) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1204 zeroconf.send(out) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1205 next = now + delay |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1206 delay = delay * 2 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1207 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1208 zeroconf.wait(min(next, last) - now) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1209 now = currentTimeMillis() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1210 result = 1 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1211 finally: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1212 zeroconf.removeListener(self) |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
1213 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1214 return result |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1215 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1216 def __eq__(self, other): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1217 """Tests equality of service name""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1218 if isinstance(other, ServiceInfo): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1219 return other.name == self.name |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1220 return 0 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1221 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1222 def __ne__(self, other): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1223 """Non-equality test""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1224 return not self.__eq__(other) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1225 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1226 def __repr__(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1227 """String representation""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1228 result = "service[%s,%s:%s," % (self.name, socket.inet_ntoa(self.getAddress()), self.port) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1229 if self.text is None: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1230 result += "None" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1231 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1232 if len(self.text) < 20: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1233 result += self.text |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1234 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1235 result += self.text[:17] + "..." |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1236 result += "]" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1237 return result |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
1238 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1239 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1240 class Zeroconf(object): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1241 """Implementation of Zeroconf Multicast DNS Service Discovery |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1242 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1243 Supports registration, unregistration, queries and browsing. |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1244 """ |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1245 def __init__(self, bindaddress=None): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1246 """Creates an instance of the Zeroconf class, establishing |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1247 multicast communications, listening and reaping threads.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1248 globals()['_GLOBAL_DONE'] = 0 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1249 if bindaddress is None: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1250 self.intf = socket.gethostbyname(socket.gethostname()) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1251 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1252 self.intf = bindaddress |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1253 self.group = ('', _MDNS_PORT) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1254 self.socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1255 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1256 self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1257 self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1) |
13930
0b7853aee5ae
zeroconf: clean up naked exceptions
Matt Mackall <mpm@selenic.com>
parents:
11435
diff
changeset
|
1258 except Exception: |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1259 # SO_REUSEADDR should be equivalent to SO_REUSEPORT for |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1260 # multicast UDP sockets (p 731, "TCP/IP Illustrated, |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1261 # Volume 2"), but some BSD-derived systems require |
17424
e7cfe3587ea4
fix trivial spelling errors
Mads Kiilerich <mads@kiilerich.com>
parents:
15782
diff
changeset
|
1262 # SO_REUSEPORT to be specified explicitly. Also, not all |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1263 # versions of Python have SO_REUSEPORT available. So |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1264 # if you're on a BSD-based system, and haven't upgraded |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1265 # to Python 2.3 yet, you may find this library doesn't |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1266 # work as expected. |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1267 # |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1268 pass |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1269 self.socket.setsockopt(socket.SOL_IP, socket.IP_MULTICAST_TTL, 255) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1270 self.socket.setsockopt(socket.SOL_IP, socket.IP_MULTICAST_LOOP, 1) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1271 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1272 self.socket.bind(self.group) |
13930
0b7853aee5ae
zeroconf: clean up naked exceptions
Matt Mackall <mpm@selenic.com>
parents:
11435
diff
changeset
|
1273 except Exception: |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1274 # Some versions of linux raise an exception even though |
17428
72803c8edaa4
avoid using abbreviations that look like spelling errors
Mads Kiilerich <mads@kiilerich.com>
parents:
17426
diff
changeset
|
1275 # SO_REUSEADDR and SO_REUSEPORT have been set, so ignore it |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1276 pass |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1277 self.socket.setsockopt(socket.SOL_IP, socket.IP_ADD_MEMBERSHIP, socket.inet_aton(_MDNS_ADDR) + socket.inet_aton('0.0.0.0')) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1278 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1279 self.listeners = [] |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1280 self.browsers = [] |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1281 self.services = {} |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1282 self.servicetypes = {} |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1283 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1284 self.cache = DNSCache() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1285 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1286 self.condition = threading.Condition() |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
1287 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1288 self.engine = Engine(self) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1289 self.listener = Listener(self) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1290 self.reaper = Reaper(self) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1291 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1292 def isLoopback(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1293 return self.intf.startswith("127.0.0.1") |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1294 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1295 def isLinklocal(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1296 return self.intf.startswith("169.254.") |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1297 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1298 def wait(self, timeout): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1299 """Calling thread waits for a given number of milliseconds or |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1300 until notified.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1301 self.condition.acquire() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1302 self.condition.wait(timeout/1000) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1303 self.condition.release() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1304 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1305 def notifyAll(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1306 """Notifies all waiting threads""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1307 self.condition.acquire() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1308 self.condition.notifyAll() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1309 self.condition.release() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1310 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1311 def getServiceInfo(self, type, name, timeout=3000): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1312 """Returns network's service information for a particular |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1313 name and type, or None if no service matches by the timeout, |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1314 which defaults to 3 seconds.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1315 info = ServiceInfo(type, name) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1316 if info.request(self, timeout): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1317 return info |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1318 return None |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1319 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1320 def addServiceListener(self, type, listener): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1321 """Adds a listener for a particular service type. This object |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1322 will then have its updateRecord method called when information |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1323 arrives for that type.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1324 self.removeServiceListener(listener) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1325 self.browsers.append(ServiceBrowser(self, type, listener)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1326 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1327 def removeServiceListener(self, listener): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1328 """Removes a listener from the set that is currently listening.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1329 for browser in self.browsers: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1330 if browser.listener == listener: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1331 browser.cancel() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1332 del(browser) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1333 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1334 def registerService(self, info, ttl=_DNS_TTL): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1335 """Registers service information to the network with a default TTL |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1336 of 60 seconds. Zeroconf will then respond to requests for |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1337 information for that service. The name of the service may be |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1338 changed if needed to make it unique on the network.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1339 self.checkService(info) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1340 self.services[info.name.lower()] = info |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1341 if self.servicetypes.has_key(info.type): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1342 self.servicetypes[info.type]+=1 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1343 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1344 self.servicetypes[info.type]=1 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1345 now = currentTimeMillis() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1346 nextTime = now |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1347 i = 0 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1348 while i < 3: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1349 if now < nextTime: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1350 self.wait(nextTime - now) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1351 now = currentTimeMillis() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1352 continue |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1353 out = DNSOutgoing(_FLAGS_QR_RESPONSE | _FLAGS_AA) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1354 out.addAnswerAtTime(DNSPointer(info.type, _TYPE_PTR, _CLASS_IN, ttl, info.name), 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1355 out.addAnswerAtTime(DNSService(info.name, _TYPE_SRV, _CLASS_IN, ttl, info.priority, info.weight, info.port, info.server), 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1356 out.addAnswerAtTime(DNSText(info.name, _TYPE_TXT, _CLASS_IN, ttl, info.text), 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1357 if info.address: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1358 out.addAnswerAtTime(DNSAddress(info.server, _TYPE_A, _CLASS_IN, ttl, info.address), 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1359 self.send(out) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1360 i += 1 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1361 nextTime += _REGISTER_TIME |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1362 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1363 def unregisterService(self, info): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1364 """Unregister a service.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1365 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1366 del(self.services[info.name.lower()]) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1367 if self.servicetypes[info.type]>1: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1368 self.servicetypes[info.type]-=1 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1369 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1370 del self.servicetypes[info.type] |
13930
0b7853aee5ae
zeroconf: clean up naked exceptions
Matt Mackall <mpm@selenic.com>
parents:
11435
diff
changeset
|
1371 except KeyError: |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1372 pass |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1373 now = currentTimeMillis() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1374 nextTime = now |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1375 i = 0 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1376 while i < 3: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1377 if now < nextTime: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1378 self.wait(nextTime - now) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1379 now = currentTimeMillis() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1380 continue |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1381 out = DNSOutgoing(_FLAGS_QR_RESPONSE | _FLAGS_AA) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1382 out.addAnswerAtTime(DNSPointer(info.type, _TYPE_PTR, _CLASS_IN, 0, info.name), 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1383 out.addAnswerAtTime(DNSService(info.name, _TYPE_SRV, _CLASS_IN, 0, info.priority, info.weight, info.port, info.name), 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1384 out.addAnswerAtTime(DNSText(info.name, _TYPE_TXT, _CLASS_IN, 0, info.text), 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1385 if info.address: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1386 out.addAnswerAtTime(DNSAddress(info.server, _TYPE_A, _CLASS_IN, 0, info.address), 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1387 self.send(out) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1388 i += 1 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1389 nextTime += _UNREGISTER_TIME |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1390 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1391 def unregisterAllServices(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1392 """Unregister all registered services.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1393 if len(self.services) > 0: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1394 now = currentTimeMillis() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1395 nextTime = now |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1396 i = 0 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1397 while i < 3: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1398 if now < nextTime: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1399 self.wait(nextTime - now) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1400 now = currentTimeMillis() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1401 continue |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1402 out = DNSOutgoing(_FLAGS_QR_RESPONSE | _FLAGS_AA) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1403 for info in self.services.values(): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1404 out.addAnswerAtTime(DNSPointer(info.type, _TYPE_PTR, _CLASS_IN, 0, info.name), 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1405 out.addAnswerAtTime(DNSService(info.name, _TYPE_SRV, _CLASS_IN, 0, info.priority, info.weight, info.port, info.server), 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1406 out.addAnswerAtTime(DNSText(info.name, _TYPE_TXT, _CLASS_IN, 0, info.text), 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1407 if info.address: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1408 out.addAnswerAtTime(DNSAddress(info.server, _TYPE_A, _CLASS_IN, 0, info.address), 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1409 self.send(out) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1410 i += 1 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1411 nextTime += _UNREGISTER_TIME |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1412 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1413 def checkService(self, info): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1414 """Checks the network for a unique service name, modifying the |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1415 ServiceInfo passed in if it is not unique.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1416 now = currentTimeMillis() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1417 nextTime = now |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1418 i = 0 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1419 while i < 3: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1420 for record in self.cache.entriesWithName(info.type): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1421 if record.type == _TYPE_PTR and not record.isExpired(now) and record.alias == info.name: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1422 if (info.name.find('.') < 0): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1423 info.name = info.name + ".[" + info.address + ":" + info.port + "]." + info.type |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1424 self.checkService(info) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1425 return |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1426 raise NonUniqueNameException |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1427 if now < nextTime: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1428 self.wait(nextTime - now) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1429 now = currentTimeMillis() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1430 continue |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1431 out = DNSOutgoing(_FLAGS_QR_QUERY | _FLAGS_AA) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1432 self.debug = out |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1433 out.addQuestion(DNSQuestion(info.type, _TYPE_PTR, _CLASS_IN)) |
17476 | 1434 out.addAuthoritativeAnswer(DNSPointer(info.type, _TYPE_PTR, _CLASS_IN, _DNS_TTL, info.name)) |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1435 self.send(out) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1436 i += 1 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1437 nextTime += _CHECK_TIME |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1438 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1439 def addListener(self, listener, question): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1440 """Adds a listener for a given question. The listener will have |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1441 its updateRecord method called when information is available to |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1442 answer the question.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1443 now = currentTimeMillis() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1444 self.listeners.append(listener) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1445 if question is not None: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1446 for record in self.cache.entriesWithName(question.name): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1447 if question.answeredBy(record) and not record.isExpired(now): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1448 listener.updateRecord(self, now, record) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1449 self.notifyAll() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1450 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1451 def removeListener(self, listener): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1452 """Removes a listener.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1453 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1454 self.listeners.remove(listener) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1455 self.notifyAll() |
13930
0b7853aee5ae
zeroconf: clean up naked exceptions
Matt Mackall <mpm@selenic.com>
parents:
11435
diff
changeset
|
1456 except Exception: |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1457 pass |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1458 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1459 def updateRecord(self, now, rec): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1460 """Used to notify listeners of new information that has updated |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1461 a record.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1462 for listener in self.listeners: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1463 listener.updateRecord(self, now, rec) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1464 self.notifyAll() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1465 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1466 def handleResponse(self, msg): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1467 """Deal with incoming response packets. All answers |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1468 are held in the cache, and listeners are notified.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1469 now = currentTimeMillis() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1470 for record in msg.answers: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1471 expired = record.isExpired(now) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1472 if record in self.cache.entries(): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1473 if expired: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1474 self.cache.remove(record) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1475 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1476 entry = self.cache.get(record) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1477 if entry is not None: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1478 entry.resetTTL(record) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1479 record = entry |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1480 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1481 self.cache.add(record) |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
1482 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1483 self.updateRecord(now, record) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1484 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1485 def handleQuery(self, msg, addr, port): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1486 """Deal with incoming query packets. Provides a response if |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1487 possible.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1488 out = None |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1489 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1490 # Support unicast client responses |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1491 # |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1492 if port != _MDNS_PORT: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1493 out = DNSOutgoing(_FLAGS_QR_RESPONSE | _FLAGS_AA, 0) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1494 for question in msg.questions: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1495 out.addQuestion(question) |
7874
d812029cda85
cleanup: drop variables for unused return values
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7071
diff
changeset
|
1496 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1497 for question in msg.questions: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1498 if question.type == _TYPE_PTR: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1499 if question.name == "_services._dns-sd._udp.local.": |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1500 for stype in self.servicetypes.keys(): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1501 if out is None: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1502 out = DNSOutgoing(_FLAGS_QR_RESPONSE | _FLAGS_AA) |
7874
d812029cda85
cleanup: drop variables for unused return values
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7071
diff
changeset
|
1503 out.addAnswer(msg, DNSPointer("_services._dns-sd._udp.local.", _TYPE_PTR, _CLASS_IN, _DNS_TTL, stype)) |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1504 for service in self.services.values(): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1505 if question.name == service.type: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1506 if out is None: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1507 out = DNSOutgoing(_FLAGS_QR_RESPONSE | _FLAGS_AA) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1508 out.addAnswer(msg, DNSPointer(service.type, _TYPE_PTR, _CLASS_IN, _DNS_TTL, service.name)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1509 else: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1510 try: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1511 if out is None: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1512 out = DNSOutgoing(_FLAGS_QR_RESPONSE | _FLAGS_AA) |
7874
d812029cda85
cleanup: drop variables for unused return values
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7071
diff
changeset
|
1513 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1514 # Answer A record queries for any service addresses we know |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1515 if question.type == _TYPE_A or question.type == _TYPE_ANY: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1516 for service in self.services.values(): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1517 if service.server == question.name.lower(): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1518 out.addAnswer(msg, DNSAddress(question.name, _TYPE_A, _CLASS_IN | _CLASS_UNIQUE, _DNS_TTL, service.address)) |
7874
d812029cda85
cleanup: drop variables for unused return values
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7071
diff
changeset
|
1519 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1520 service = self.services.get(question.name.lower(), None) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1521 if not service: continue |
7874
d812029cda85
cleanup: drop variables for unused return values
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7071
diff
changeset
|
1522 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1523 if question.type == _TYPE_SRV or question.type == _TYPE_ANY: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1524 out.addAnswer(msg, DNSService(question.name, _TYPE_SRV, _CLASS_IN | _CLASS_UNIQUE, _DNS_TTL, service.priority, service.weight, service.port, service.server)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1525 if question.type == _TYPE_TXT or question.type == _TYPE_ANY: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1526 out.addAnswer(msg, DNSText(question.name, _TYPE_TXT, _CLASS_IN | _CLASS_UNIQUE, _DNS_TTL, service.text)) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1527 if question.type == _TYPE_SRV: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1528 out.addAdditionalAnswer(DNSAddress(service.server, _TYPE_A, _CLASS_IN | _CLASS_UNIQUE, _DNS_TTL, service.address)) |
13930
0b7853aee5ae
zeroconf: clean up naked exceptions
Matt Mackall <mpm@selenic.com>
parents:
11435
diff
changeset
|
1529 except Exception: |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1530 traceback.print_exc() |
7874
d812029cda85
cleanup: drop variables for unused return values
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7071
diff
changeset
|
1531 |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1532 if out is not None and out.answers: |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1533 out.id = msg.id |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1534 self.send(out, addr, port) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1535 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1536 def send(self, out, addr = _MDNS_ADDR, port = _MDNS_PORT): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1537 """Sends an outgoing packet.""" |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1538 # This is a quick test to see if we can parse the packets we generate |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1539 #temp = DNSIncoming(out.packet()) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1540 try: |
7874
d812029cda85
cleanup: drop variables for unused return values
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7071
diff
changeset
|
1541 self.socket.sendto(out.packet(), 0, (addr, port)) |
13930
0b7853aee5ae
zeroconf: clean up naked exceptions
Matt Mackall <mpm@selenic.com>
parents:
11435
diff
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|
1542 except Exception: |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1543 # Ignore this, it may be a temporary loss of network connection |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1544 pass |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
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|
1545 |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1546 def close(self): |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1547 """Ends the background threads, and prevent this instance from |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1548 servicing further queries.""" |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1549 if globals()['_GLOBAL_DONE'] == 0: |
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zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1550 globals()['_GLOBAL_DONE'] = 1 |
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zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1551 self.notifyAll() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1552 self.engine.notify() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1553 self.unregisterAllServices() |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1554 self.socket.setsockopt(socket.SOL_IP, socket.IP_DROP_MEMBERSHIP, socket.inet_aton(_MDNS_ADDR) + socket.inet_aton('0.0.0.0')) |
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zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1555 self.socket.close() |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
1556 |
7071
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1557 # Test a few module features, including service registration, service |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1558 # query (for Zoe), and service unregistration. |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1559 |
7877
eba7f12b0c51
cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
7874
diff
changeset
|
1560 if __name__ == '__main__': |
7071
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1561 print "Multicast DNS Service Discovery for Python, version", __version__ |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1562 r = Zeroconf() |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1563 print "1. Testing registration of a service..." |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1564 desc = {'version':'0.10','a':'test value', 'b':'another value'} |
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parents:
diff
changeset
|
1565 info = ServiceInfo("_http._tcp.local.", "My Service Name._http._tcp.local.", socket.inet_aton("127.0.0.1"), 1234, 0, 0, desc) |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1566 print " Registering service..." |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1567 r.registerService(info) |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1568 print " Registration done." |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1569 print "2. Testing query of service information..." |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1570 print " Getting ZOE service:", str(r.getServiceInfo("_http._tcp.local.", "ZOE._http._tcp.local.")) |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1571 print " Query done." |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1572 print "3. Testing query of own service..." |
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zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1573 print " Getting self:", str(r.getServiceInfo("_http._tcp.local.", "My Service Name._http._tcp.local.")) |
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1574 print " Query done." |
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zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1575 print "4. Testing unregister of service information..." |
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zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1576 r.unregisterService(info) |
643c751e60b2
zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1577 print " Unregister done." |
643c751e60b2
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
1578 r.close() |
10288
e0121ad90b57
zeroconf: flag third-party Zeroconf.py for ignore in check-code
Matt Mackall <mpm@selenic.com>
parents:
8131
diff
changeset
|
1579 |
e0121ad90b57
zeroconf: flag third-party Zeroconf.py for ignore in check-code
Matt Mackall <mpm@selenic.com>
parents:
8131
diff
changeset
|
1580 # no-check-code |