annotate hgext/zeroconf/Zeroconf.py @ 8210:344751cd8cb8

replace various uses of list.reverse()
author Matt Mackall <mpm@selenic.com>
date Sun, 26 Apr 2009 16:50:44 -0500
parents b0d945b95105
children e0121ad90b57
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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, write to the Free Software
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21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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 insensitivty 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
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117 _FLAGS_AA = 0x0400 # Authorative 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 # implementation classes
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208
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209 class DNSEntry(object):
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210 """A DNS entry"""
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211
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212 def __init__(self, name, type, clazz):
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213 self.key = string.lower(name)
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214 self.name = name
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215 self.type = type
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216 self.clazz = clazz & _CLASS_MASK
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217 self.unique = (clazz & _CLASS_UNIQUE) != 0
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218
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219 def __eq__(self, other):
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220 """Equality test on name, type, and class"""
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221 if isinstance(other, DNSEntry):
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222 return self.name == other.name and self.type == other.type and self.clazz == other.clazz
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223 return 0
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224
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225 def __ne__(self, other):
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226 """Non-equality test"""
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227 return not self.__eq__(other)
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228
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229 def getClazz(self, clazz):
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230 """Class accessor"""
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231 try:
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232 return _CLASSES[clazz]
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233 except:
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234 return "?(%s)" % (clazz)
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235
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236 def getType(self, type):
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237 """Type accessor"""
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238 try:
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239 return _TYPES[type]
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240 except:
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241 return "?(%s)" % (type)
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242
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243 def toString(self, hdr, other):
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244 """String representation with additional information"""
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245 result = "%s[%s,%s" % (hdr, self.getType(self.type), self.getClazz(self.clazz))
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246 if self.unique:
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247 result += "-unique,"
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248 else:
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249 result += ","
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250 result += self.name
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251 if other is not None:
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252 result += ",%s]" % (other)
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253 else:
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254 result += "]"
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255 return result
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256
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257 class DNSQuestion(DNSEntry):
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258 """A DNS question entry"""
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259
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260 def __init__(self, name, type, clazz):
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261 if not name.endswith(".local."):
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262 raise NonLocalNameException(name)
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263 DNSEntry.__init__(self, name, type, clazz)
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264
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265 def answeredBy(self, rec):
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266 """Returns true if the question is answered by the record"""
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267 return self.clazz == rec.clazz and (self.type == rec.type or self.type == _TYPE_ANY) and self.name == rec.name
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268
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269 def __repr__(self):
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270 """String representation"""
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271 return DNSEntry.toString(self, "question", None)
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272
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273
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274 class DNSRecord(DNSEntry):
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275 """A DNS record - like a DNS entry, but has a TTL"""
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276
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277 def __init__(self, name, type, clazz, ttl):
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278 DNSEntry.__init__(self, name, type, clazz)
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279 self.ttl = ttl
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280 self.created = currentTimeMillis()
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281
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282 def __eq__(self, other):
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283 """Tests equality as per DNSRecord"""
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284 if isinstance(other, DNSRecord):
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285 return DNSEntry.__eq__(self, other)
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286 return 0
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287
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288 def suppressedBy(self, msg):
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289 """Returns true if any answer in a message can suffice for the
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290 information held in this record."""
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291 for record in msg.answers:
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292 if self.suppressedByAnswer(record):
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293 return 1
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294 return 0
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295
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296 def suppressedByAnswer(self, other):
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297 """Returns true if another record has same name, type and class,
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298 and if its TTL is at least half of this record's."""
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299 if self == other and other.ttl > (self.ttl / 2):
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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 getExpirationTime(self, percent):
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304 """Returns the time at which this record will have expired
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305 by a certain percentage."""
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306 return self.created + (percent * self.ttl * 10)
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307
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308 def getRemainingTTL(self, now):
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309 """Returns the remaining TTL in seconds."""
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310 return max(0, (self.getExpirationTime(100) - now) / 1000)
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311
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312 def isExpired(self, now):
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313 """Returns true if this record has expired."""
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314 return self.getExpirationTime(100) <= now
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315
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316 def isStale(self, now):
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317 """Returns true if this record is at least half way expired."""
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318 return self.getExpirationTime(50) <= now
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319
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320 def resetTTL(self, other):
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321 """Sets this record's TTL and created time to that of
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322 another record."""
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323 self.created = other.created
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324 self.ttl = other.ttl
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325
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326 def write(self, out):
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327 """Abstract method"""
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328 raise AbstractMethodException
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329
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330 def toString(self, other):
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331 """String representation with addtional information"""
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332 arg = "%s/%s,%s" % (self.ttl, self.getRemainingTTL(currentTimeMillis()), other)
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333 return DNSEntry.toString(self, "record", arg)
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334
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335 class DNSAddress(DNSRecord):
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336 """A DNS address record"""
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337
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338 def __init__(self, name, type, clazz, ttl, address):
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339 DNSRecord.__init__(self, name, type, clazz, ttl)
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340 self.address = address
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341
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342 def write(self, out):
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343 """Used in constructing an outgoing packet"""
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344 out.writeString(self.address, len(self.address))
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345
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346 def __eq__(self, other):
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347 """Tests equality on address"""
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348 if isinstance(other, DNSAddress):
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349 return self.address == other.address
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350 return 0
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351
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352 def __repr__(self):
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353 """String representation"""
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354 try:
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355 return socket.inet_ntoa(self.address)
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356 except:
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357 return self.address
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358
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359 class DNSHinfo(DNSRecord):
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360 """A DNS host information record"""
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361
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362 def __init__(self, name, type, clazz, ttl, cpu, os):
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363 DNSRecord.__init__(self, name, type, clazz, ttl)
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364 self.cpu = cpu
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365 self.os = os
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366
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367 def write(self, out):
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368 """Used in constructing an outgoing packet"""
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369 out.writeString(self.cpu, len(self.cpu))
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370 out.writeString(self.os, len(self.os))
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371
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372 def __eq__(self, other):
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373 """Tests equality on cpu and os"""
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374 if isinstance(other, DNSHinfo):
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375 return self.cpu == other.cpu and self.os == other.os
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376 return 0
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377
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378 def __repr__(self):
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379 """String representation"""
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380 return self.cpu + " " + self.os
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381
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382 class DNSPointer(DNSRecord):
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383 """A DNS pointer record"""
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384
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385 def __init__(self, name, type, clazz, ttl, alias):
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386 DNSRecord.__init__(self, name, type, clazz, ttl)
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387 self.alias = alias
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388
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389 def write(self, out):
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390 """Used in constructing an outgoing packet"""
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391 out.writeName(self.alias)
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392
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393 def __eq__(self, other):
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394 """Tests equality on alias"""
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395 if isinstance(other, DNSPointer):
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396 return self.alias == other.alias
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397 return 0
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398
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diff changeset
399 def __repr__(self):
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400 """String representation"""
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diff changeset
401 return self.toString(self.alias)
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diff changeset
402
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403 class DNSText(DNSRecord):
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404 """A DNS text record"""
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405
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406 def __init__(self, name, type, clazz, ttl, text):
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407 DNSRecord.__init__(self, name, type, clazz, ttl)
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408 self.text = text
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diff changeset
409
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diff changeset
410 def write(self, out):
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diff changeset
411 """Used in constructing an outgoing packet"""
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diff changeset
412 out.writeString(self.text, len(self.text))
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diff changeset
413
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diff changeset
414 def __eq__(self, other):
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diff changeset
415 """Tests equality on text"""
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diff changeset
416 if isinstance(other, DNSText):
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417 return self.text == other.text
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418 return 0
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diff changeset
419
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420 def __repr__(self):
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diff changeset
421 """String representation"""
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diff changeset
422 if len(self.text) > 10:
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423 return self.toString(self.text[:7] + "...")
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424 else:
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diff changeset
425 return self.toString(self.text)
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diff changeset
426
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diff changeset
427 class DNSService(DNSRecord):
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diff changeset
428 """A DNS service record"""
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429
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430 def __init__(self, name, type, clazz, ttl, priority, weight, port, server):
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431 DNSRecord.__init__(self, name, type, clazz, ttl)
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432 self.priority = priority
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diff changeset
433 self.weight = weight
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diff changeset
434 self.port = port
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diff changeset
435 self.server = server
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diff changeset
436
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diff changeset
437 def write(self, out):
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diff changeset
438 """Used in constructing an outgoing packet"""
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diff changeset
439 out.writeShort(self.priority)
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diff changeset
440 out.writeShort(self.weight)
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diff changeset
441 out.writeShort(self.port)
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442 out.writeName(self.server)
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diff changeset
443
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diff changeset
444 def __eq__(self, other):
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diff changeset
445 """Tests equality on priority, weight, port and server"""
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diff changeset
446 if isinstance(other, DNSService):
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diff changeset
447 return self.priority == other.priority and self.weight == other.weight and self.port == other.port and self.server == other.server
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diff changeset
448 return 0
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diff changeset
449
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diff changeset
450 def __repr__(self):
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diff changeset
451 """String representation"""
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diff changeset
452 return self.toString("%s:%s" % (self.server, self.port))
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diff changeset
453
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diff changeset
454 class DNSIncoming(object):
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diff changeset
455 """Object representation of an incoming DNS packet"""
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456
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457 def __init__(self, data):
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diff changeset
458 """Constructor from string holding bytes of packet"""
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diff changeset
459 self.offset = 0
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diff changeset
460 self.data = data
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diff changeset
461 self.questions = []
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diff changeset
462 self.answers = []
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diff changeset
463 self.numQuestions = 0
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diff changeset
464 self.numAnswers = 0
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diff changeset
465 self.numAuthorities = 0
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diff changeset
466 self.numAdditionals = 0
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467
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468 self.readHeader()
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diff changeset
469 self.readQuestions()
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diff changeset
470 self.readOthers()
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parents:
diff changeset
471
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diff changeset
472 def readHeader(self):
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parents:
diff changeset
473 """Reads header portion of packet"""
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parents:
diff changeset
474 format = '!HHHHHH'
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parents:
diff changeset
475 length = struct.calcsize(format)
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parents:
diff changeset
476 info = struct.unpack(format, self.data[self.offset:self.offset+length])
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parents:
diff changeset
477 self.offset += length
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parents:
diff changeset
478
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parents:
diff changeset
479 self.id = info[0]
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parents:
diff changeset
480 self.flags = info[1]
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parents:
diff changeset
481 self.numQuestions = info[2]
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parents:
diff changeset
482 self.numAnswers = info[3]
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parents:
diff changeset
483 self.numAuthorities = info[4]
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parents:
diff changeset
484 self.numAdditionals = info[5]
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parents:
diff changeset
485
643c751e60b2 zeroconf: initial implementation
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parents:
diff changeset
486 def readQuestions(self):
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parents:
diff changeset
487 """Reads questions section of packet"""
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parents:
diff changeset
488 format = '!HH'
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diff changeset
489 length = struct.calcsize(format)
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diff changeset
490 for i in range(0, self.numQuestions):
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parents:
diff changeset
491 name = self.readName()
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parents:
diff changeset
492 info = struct.unpack(format, self.data[self.offset:self.offset+length])
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parents:
diff changeset
493 self.offset += length
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
494
8131
b0d945b95105 zeroconf: don't fail on non-local names
Alexander Solovyov <piranha@piranha.org.ua>
parents: 7877
diff changeset
495 try:
b0d945b95105 zeroconf: don't fail on non-local names
Alexander Solovyov <piranha@piranha.org.ua>
parents: 7877
diff changeset
496 question = DNSQuestion(name, info[0], info[1])
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Alexander Solovyov <piranha@piranha.org.ua>
parents: 7877
diff changeset
497 self.questions.append(question)
b0d945b95105 zeroconf: don't fail on non-local names
Alexander Solovyov <piranha@piranha.org.ua>
parents: 7877
diff changeset
498 except NonLocalNameException:
b0d945b95105 zeroconf: don't fail on non-local names
Alexander Solovyov <piranha@piranha.org.ua>
parents: 7877
diff changeset
499 pass
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
500
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
501 def readInt(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
502 """Reads an integer from the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
503 format = '!I'
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
504 length = struct.calcsize(format)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
505 info = struct.unpack(format, self.data[self.offset:self.offset+length])
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
506 self.offset += length
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
507 return info[0]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
508
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
509 def readCharacterString(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
510 """Reads a character string from the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
511 length = ord(self.data[self.offset])
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
512 self.offset += 1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
513 return self.readString(length)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
514
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
515 def readString(self, len):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
516 """Reads a string of a given length from the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
517 format = '!' + str(len) + 's'
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
518 length = struct.calcsize(format)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
519 info = struct.unpack(format, self.data[self.offset:self.offset+length])
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
520 self.offset += length
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
521 return info[0]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
522
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
523 def readUnsignedShort(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
524 """Reads an unsigned short from the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
525 format = '!H'
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
526 length = struct.calcsize(format)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
527 info = struct.unpack(format, self.data[self.offset:self.offset+length])
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
528 self.offset += length
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
529 return info[0]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
530
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
531 def readOthers(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
532 """Reads the answers, authorities and additionals section of the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
533 format = '!HHiH'
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
534 length = struct.calcsize(format)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
535 n = self.numAnswers + self.numAuthorities + self.numAdditionals
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
536 for i in range(0, n):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
537 domain = self.readName()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
538 info = struct.unpack(format, self.data[self.offset:self.offset+length])
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
539 self.offset += length
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
540
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
541 rec = None
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
542 if info[0] == _TYPE_A:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
543 rec = DNSAddress(domain, info[0], info[1], info[2], self.readString(4))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
544 elif info[0] == _TYPE_CNAME or info[0] == _TYPE_PTR:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
545 rec = DNSPointer(domain, info[0], info[1], info[2], self.readName())
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
546 elif info[0] == _TYPE_TXT:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
547 rec = DNSText(domain, info[0], info[1], info[2], self.readString(info[3]))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
548 elif info[0] == _TYPE_SRV:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
549 rec = DNSService(domain, info[0], info[1], info[2], self.readUnsignedShort(), self.readUnsignedShort(), self.readUnsignedShort(), self.readName())
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
550 elif info[0] == _TYPE_HINFO:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
551 rec = DNSHinfo(domain, info[0], info[1], info[2], self.readCharacterString(), self.readCharacterString())
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
552 elif info[0] == _TYPE_AAAA:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
553 rec = DNSAddress(domain, info[0], info[1], info[2], self.readString(16))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
554 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
555 # Try to ignore types we don't know about
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
556 # this may mean the rest of the name is
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
557 # unable to be parsed, and may show errors
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
558 # so this is left for debugging. New types
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
559 # encountered need to be parsed properly.
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
560 #
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
561 #print "UNKNOWN TYPE = " + str(info[0])
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
562 #raise BadTypeInNameException
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
563 pass
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
564
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
565 if rec is not None:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
566 self.answers.append(rec)
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
567
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
568 def isQuery(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
569 """Returns true if this is a query"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
570 return (self.flags & _FLAGS_QR_MASK) == _FLAGS_QR_QUERY
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
571
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
572 def isResponse(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
573 """Returns true if this is a response"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
574 return (self.flags & _FLAGS_QR_MASK) == _FLAGS_QR_RESPONSE
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
575
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
576 def readUTF(self, offset, len):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
577 """Reads a UTF-8 string of a given length from the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
578 result = self.data[offset:offset+len].decode('utf-8')
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
579 return result
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
580
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
581 def readName(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
582 """Reads a domain name from the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
583 result = ''
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
584 off = self.offset
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
585 next = -1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
586 first = off
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
587
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
588 while 1:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
589 len = ord(self.data[off])
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
590 off += 1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
591 if len == 0:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
592 break
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
593 t = len & 0xC0
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
594 if t == 0x00:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
595 result = ''.join((result, self.readUTF(off, len) + '.'))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
596 off += len
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
597 elif t == 0xC0:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
598 if next < 0:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
599 next = off + 1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
600 off = ((len & 0x3F) << 8) | ord(self.data[off])
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
601 if off >= first:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
602 raise "Bad domain name (circular) at " + str(off)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
603 first = off
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
604 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
605 raise "Bad domain name at " + str(off)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
606
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
607 if next >= 0:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
608 self.offset = next
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
609 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
610 self.offset = off
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
611
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
612 return result
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
613
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
614
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
615 class DNSOutgoing(object):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
616 """Object representation of an outgoing packet"""
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
617
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
618 def __init__(self, flags, multicast = 1):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
619 self.finished = 0
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
620 self.id = 0
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
621 self.multicast = multicast
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
622 self.flags = flags
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
623 self.names = {}
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
624 self.data = []
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
625 self.size = 12
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
626
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
627 self.questions = []
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
628 self.answers = []
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
629 self.authorities = []
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
630 self.additionals = []
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
631
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
632 def addQuestion(self, record):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
633 """Adds a question"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
634 self.questions.append(record)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
635
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
636 def addAnswer(self, inp, record):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
637 """Adds an answer"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
638 if not record.suppressedBy(inp):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
639 self.addAnswerAtTime(record, 0)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
640
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
641 def addAnswerAtTime(self, record, now):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
642 """Adds an answer if if does not expire by a certain time"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
643 if record is not None:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
644 if now == 0 or not record.isExpired(now):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
645 self.answers.append((record, now))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
646
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
647 def addAuthorativeAnswer(self, record):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
648 """Adds an authoritative answer"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
649 self.authorities.append(record)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
650
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
651 def addAdditionalAnswer(self, record):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
652 """Adds an additional answer"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
653 self.additionals.append(record)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
654
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
655 def writeByte(self, value):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
656 """Writes a single byte to the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
657 format = '!c'
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
658 self.data.append(struct.pack(format, chr(value)))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
659 self.size += 1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
660
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
661 def insertShort(self, index, value):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
662 """Inserts an unsigned short in a certain position in the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
663 format = '!H'
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
664 self.data.insert(index, struct.pack(format, value))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
665 self.size += 2
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
666
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
667 def writeShort(self, value):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
668 """Writes an unsigned short to the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
669 format = '!H'
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
670 self.data.append(struct.pack(format, value))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
671 self.size += 2
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
672
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
673 def writeInt(self, value):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
674 """Writes an unsigned integer to the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
675 format = '!I'
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
676 self.data.append(struct.pack(format, int(value)))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
677 self.size += 4
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
678
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
679 def writeString(self, value, length):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
680 """Writes a string to the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
681 format = '!' + str(length) + 's'
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
682 self.data.append(struct.pack(format, value))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
683 self.size += length
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
684
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
685 def writeUTF(self, s):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
686 """Writes a UTF-8 string of a given length to the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
687 utfstr = s.encode('utf-8')
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
688 length = len(utfstr)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
689 if length > 64:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
690 raise NamePartTooLongException
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
691 self.writeByte(length)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
692 self.writeString(utfstr, length)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
693
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
694 def writeName(self, name):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
695 """Writes a domain name to the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
696
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
697 try:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
698 # Find existing instance of this name in packet
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
699 #
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
700 index = self.names[name]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
701 except KeyError:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
702 # No record of this name already, so write it
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
703 # out as normal, recording the location of the name
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
704 # for future pointers to it.
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
705 #
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
706 self.names[name] = self.size
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
707 parts = name.split('.')
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
708 if parts[-1] == '':
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
709 parts = parts[:-1]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
710 for part in parts:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
711 self.writeUTF(part)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
712 self.writeByte(0)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
713 return
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
714
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
715 # An index was found, so write a pointer to it
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
716 #
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
717 self.writeByte((index >> 8) | 0xC0)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
718 self.writeByte(index)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
719
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
720 def writeQuestion(self, question):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
721 """Writes a question to the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
722 self.writeName(question.name)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
723 self.writeShort(question.type)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
724 self.writeShort(question.clazz)
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 writeRecord(self, record, now):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
727 """Writes a record (answer, authoritative answer, additional) to
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
728 the packet"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
729 self.writeName(record.name)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
730 self.writeShort(record.type)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
731 if record.unique and self.multicast:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
732 self.writeShort(record.clazz | _CLASS_UNIQUE)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
733 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
734 self.writeShort(record.clazz)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
735 if now == 0:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
736 self.writeInt(record.ttl)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
737 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
738 self.writeInt(record.getRemainingTTL(now))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
739 index = len(self.data)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
740 # Adjust size for the short we will write before this record
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
741 #
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
742 self.size += 2
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
743 record.write(self)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
744 self.size -= 2
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
745
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
746 length = len(''.join(self.data[index:]))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
747 self.insertShort(index, length) # Here is the short we adjusted for
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
748
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
749 def packet(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
750 """Returns a string containing the packet's bytes
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
751
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
752 No further parts should be added to the packet once this
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
753 is done."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
754 if not self.finished:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
755 self.finished = 1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
756 for question in self.questions:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
757 self.writeQuestion(question)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
758 for answer, time in self.answers:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
759 self.writeRecord(answer, time)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
760 for authority in self.authorities:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
761 self.writeRecord(authority, 0)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
762 for additional in self.additionals:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
763 self.writeRecord(additional, 0)
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
764
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
765 self.insertShort(0, len(self.additionals))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
766 self.insertShort(0, len(self.authorities))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
767 self.insertShort(0, len(self.answers))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
768 self.insertShort(0, len(self.questions))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
769 self.insertShort(0, self.flags)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
770 if self.multicast:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
771 self.insertShort(0, 0)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
772 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
773 self.insertShort(0, self.id)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
774 return ''.join(self.data)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
775
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
776
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
777 class DNSCache(object):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
778 """A cache of DNS entries"""
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
779
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
780 def __init__(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
781 self.cache = {}
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 def add(self, entry):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
784 """Adds an entry"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
785 try:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
786 list = self.cache[entry.key]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
787 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
788 list = self.cache[entry.key] = []
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
789 list.append(entry)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
790
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
791 def remove(self, entry):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
792 """Removes an entry"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
793 try:
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.remove(entry)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
796 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
797 pass
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
798
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
799 def get(self, entry):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
800 """Gets an entry by key. Will return None if there is no
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
801 matching entry."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
802 try:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
803 list = self.cache[entry.key]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
804 return list[list.index(entry)]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
805 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
806 return None
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
807
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
808 def getByDetails(self, name, type, clazz):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
809 """Gets an entry by details. Will return None if there is
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
810 no matching entry."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
811 entry = DNSEntry(name, type, clazz)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
812 return self.get(entry)
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 entriesWithName(self, name):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
815 """Returns a list of entries whose key matches the name."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
816 try:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
817 return self.cache[name]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
818 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
819 return []
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
820
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
821 def entries(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
822 """Returns a list of all entries"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
823 def add(x, y): return x+y
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
824 try:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
825 return reduce(add, self.cache.values())
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
826 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
827 return []
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
828
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
829
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
830 class Engine(threading.Thread):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
831 """An engine wraps read access to sockets, allowing objects that
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
832 need to receive data from sockets to be called back when the
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
833 sockets are ready.
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 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
836 it is interested in is ready for reading.
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
837
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
838 Writers are not implemented here, because we only send short
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
839 packets.
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
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
842 def __init__(self, zeroconf):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
843 threading.Thread.__init__(self)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
844 self.zeroconf = zeroconf
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
845 self.readers = {} # maps socket to reader
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
846 self.timeout = 5
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
847 self.condition = threading.Condition()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
848 self.start()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
849
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
850 def run(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
851 while not globals()['_GLOBAL_DONE']:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
852 rs = self.getReaders()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
853 if len(rs) == 0:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
854 # No sockets to manage, but we wait for the timeout
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
855 # or addition of a socket
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
856 #
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
857 self.condition.acquire()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
858 self.condition.wait(self.timeout)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
859 self.condition.release()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
860 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
861 try:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
862 rr, wr, er = select.select(rs, [], [], self.timeout)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
863 for socket in rr:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
864 try:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
865 self.readers[socket].handle_read()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
866 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
867 traceback.print_exc()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
868 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
869 pass
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
870
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
871 def getReaders(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
872 self.condition.acquire()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
873 result = self.readers.keys()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
874 self.condition.release()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
875 return result
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
876
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
877 def addReader(self, reader, socket):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
878 self.condition.acquire()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
879 self.readers[socket] = reader
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
880 self.condition.notify()
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
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
883 def delReader(self, socket):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
884 self.condition.acquire()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
885 del(self.readers[socket])
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
886 self.condition.notify()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
887 self.condition.release()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
888
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
889 def notify(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
890 self.condition.acquire()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
891 self.condition.notify()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
892 self.condition.release()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
893
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
894 class Listener(object):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
895 """A Listener is used by this module to listen on the multicast
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
896 group to which DNS messages are sent, allowing the implementation
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
897 to cache information as it arrives.
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
898
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
899 It requires registration with an Engine object in order to have
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
900 the read() method called when a socket is availble for reading."""
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
901
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
902 def __init__(self, zeroconf):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
903 self.zeroconf = zeroconf
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
904 self.zeroconf.engine.addReader(self, self.zeroconf.socket)
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 def handle_read(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
907 data, (addr, port) = self.zeroconf.socket.recvfrom(_MAX_MSG_ABSOLUTE)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
908 self.data = data
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
909 msg = DNSIncoming(data)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
910 if msg.isQuery():
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
911 # Always multicast responses
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 if port == _MDNS_PORT:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
914 self.zeroconf.handleQuery(msg, _MDNS_ADDR, _MDNS_PORT)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
915 # If it's not a multicast query, reply via unicast
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
916 # and multicast
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
917 #
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
918 elif port == _DNS_PORT:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
919 self.zeroconf.handleQuery(msg, addr, port)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
920 self.zeroconf.handleQuery(msg, _MDNS_ADDR, _MDNS_PORT)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
921 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
922 self.zeroconf.handleResponse(msg)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
923
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 class Reaper(threading.Thread):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
926 """A Reaper is used by this module to remove cache entries that
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
927 have expired."""
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
928
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
929 def __init__(self, zeroconf):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
930 threading.Thread.__init__(self)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
931 self.zeroconf = zeroconf
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
932 self.start()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
933
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
934 def run(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
935 while 1:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
936 self.zeroconf.wait(10 * 1000)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
937 if globals()['_GLOBAL_DONE']:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
938 return
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
939 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
940 for record in self.zeroconf.cache.entries():
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
941 if record.isExpired(now):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
942 self.zeroconf.updateRecord(now, record)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
943 self.zeroconf.cache.remove(record)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
944
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
945
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
946 class ServiceBrowser(threading.Thread):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
947 """Used to browse for a service of a specific type.
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
948
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
949 The listener object will have its addService() and
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
950 removeService() methods called when this browser
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
951 discovers changes in the services availability."""
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
952
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
953 def __init__(self, zeroconf, type, listener):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
954 """Creates a browser for a specific type"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
955 threading.Thread.__init__(self)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
956 self.zeroconf = zeroconf
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
957 self.type = type
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
958 self.listener = listener
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
959 self.services = {}
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
960 self.nextTime = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
961 self.delay = _BROWSER_TIME
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
962 self.list = []
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
963
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
964 self.done = 0
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
965
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
966 self.zeroconf.addListener(self, DNSQuestion(self.type, _TYPE_PTR, _CLASS_IN))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
967 self.start()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
968
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
969 def updateRecord(self, zeroconf, now, record):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
970 """Callback invoked by Zeroconf when new information arrives.
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
971
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
972 Updates information required by browser in the Zeroconf cache."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
973 if record.type == _TYPE_PTR and record.name == self.type:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
974 expired = record.isExpired(now)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
975 try:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
976 oldrecord = self.services[record.alias.lower()]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
977 if not expired:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
978 oldrecord.resetTTL(record)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
979 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
980 del(self.services[record.alias.lower()])
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
981 callback = lambda x: self.listener.removeService(x, self.type, record.alias)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
982 self.list.append(callback)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
983 return
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
984 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
985 if not expired:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
986 self.services[record.alias.lower()] = record
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
987 callback = lambda x: self.listener.addService(x, self.type, record.alias)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
988 self.list.append(callback)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
989
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
990 expires = record.getExpirationTime(75)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
991 if expires < self.nextTime:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
992 self.nextTime = expires
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
993
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
994 def cancel(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
995 self.done = 1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
996 self.zeroconf.notifyAll()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
997
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
998 def run(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
999 while 1:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1000 event = None
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1001 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1002 if len(self.list) == 0 and self.nextTime > now:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1003 self.zeroconf.wait(self.nextTime - now)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1004 if globals()['_GLOBAL_DONE'] or self.done:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1005 return
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1006 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1007
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1008 if self.nextTime <= now:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1009 out = DNSOutgoing(_FLAGS_QR_QUERY)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1010 out.addQuestion(DNSQuestion(self.type, _TYPE_PTR, _CLASS_IN))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1011 for record in self.services.values():
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1012 if not record.isExpired(now):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1013 out.addAnswerAtTime(record, now)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1014 self.zeroconf.send(out)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1015 self.nextTime = now + self.delay
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1016 self.delay = min(20 * 1000, self.delay * 2)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1017
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1018 if len(self.list) > 0:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1019 event = self.list.pop(0)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1020
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1021 if event is not None:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1022 event(self.zeroconf)
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
1023
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1024
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1025 class ServiceInfo(object):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1026 """Service information"""
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
1027
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1028 def __init__(self, type, name, address=None, port=None, weight=0, priority=0, properties=None, server=None):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1029 """Create a service description.
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1030
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1031 type: fully qualified service type name
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1032 name: fully qualified service name
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1033 address: IP address as unsigned short, network byte order
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1034 port: port that the service runs on
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1035 weight: weight of the service
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1036 priority: priority of the service
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1037 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
1038 server: fully qualified name for service host (defaults to name)"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1039
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1040 if not name.endswith(type):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1041 raise BadTypeInNameException
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1042 self.type = type
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1043 self.name = name
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1044 self.address = address
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1045 self.port = port
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1046 self.weight = weight
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1047 self.priority = priority
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1048 if server:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1049 self.server = server
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1050 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1051 self.server = name
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1052 self.setProperties(properties)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1053
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1054 def setProperties(self, properties):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1055 """Sets properties and text of this info from a dictionary"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1056 if isinstance(properties, dict):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1057 self.properties = properties
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1058 list = []
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1059 result = ''
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1060 for key in properties:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1061 value = properties[key]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1062 if value is None:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1063 suffix = ''.encode('utf-8')
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1064 elif isinstance(value, str):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1065 suffix = value.encode('utf-8')
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1066 elif isinstance(value, int):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1067 if value:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1068 suffix = 'true'
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1069 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1070 suffix = 'false'
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1071 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1072 suffix = ''.encode('utf-8')
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1073 list.append('='.join((key, suffix)))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1074 for item in list:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1075 result = ''.join((result, struct.pack('!c', chr(len(item))), item))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1076 self.text = result
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1077 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1078 self.text = properties
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1079
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1080 def setText(self, text):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1081 """Sets properties and text given a text field"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1082 self.text = text
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1083 try:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1084 result = {}
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1085 end = len(text)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1086 index = 0
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1087 strs = []
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1088 while index < end:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1089 length = ord(text[index])
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1090 index += 1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1091 strs.append(text[index:index+length])
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1092 index += length
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
1093
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1094 for s in strs:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1095 eindex = s.find('=')
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1096 if eindex == -1:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1097 # No equals sign at all
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1098 key = s
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1099 value = 0
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1100 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1101 key = s[:eindex]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1102 value = s[eindex+1:]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1103 if value == 'true':
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1104 value = 1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1105 elif value == 'false' or not value:
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
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1108 # Only update non-existent properties
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1109 if key and result.get(key) == None:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1110 result[key] = value
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1111
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1112 self.properties = result
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1113 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1114 traceback.print_exc()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1115 self.properties = None
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
1116
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1117 def getType(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1118 """Type accessor"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1119 return self.type
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1120
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1121 def getName(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1122 """Name accessor"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1123 if self.type is not None and self.name.endswith("." + self.type):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1124 return self.name[:len(self.name) - len(self.type) - 1]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1125 return self.name
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1126
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1127 def getAddress(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1128 """Address accessor"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1129 return self.address
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1130
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1131 def getPort(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1132 """Port accessor"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1133 return self.port
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1134
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1135 def getPriority(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1136 """Pirority accessor"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1137 return self.priority
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1138
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1139 def getWeight(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1140 """Weight accessor"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1141 return self.weight
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1142
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1143 def getProperties(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1144 """Properties accessor"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1145 return self.properties
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1146
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1147 def getText(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1148 """Text accessor"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1149 return self.text
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1150
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1151 def getServer(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1152 """Server accessor"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1153 return self.server
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1154
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1155 def updateRecord(self, zeroconf, now, record):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1156 """Updates service information from a DNS record"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1157 if record is not None and not record.isExpired(now):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1158 if record.type == _TYPE_A:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1159 #if record.name == self.name:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1160 if record.name == self.server:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1161 self.address = record.address
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1162 elif record.type == _TYPE_SRV:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1163 if record.name == self.name:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1164 self.server = record.server
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1165 self.port = record.port
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1166 self.weight = record.weight
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1167 self.priority = record.priority
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1168 #self.address = None
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1169 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
1170 elif record.type == _TYPE_TXT:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1171 if record.name == self.name:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1172 self.setText(record.text)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1173
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1174 def request(self, zeroconf, timeout):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1175 """Returns true if the service could be discovered on the
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1176 network, and updates this object with details discovered.
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1177 """
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1178 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1179 delay = _LISTENER_TIME
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1180 next = now + delay
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1181 last = now + timeout
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1182 result = 0
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1183 try:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1184 zeroconf.addListener(self, DNSQuestion(self.name, _TYPE_ANY, _CLASS_IN))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1185 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
1186 if last <= now:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1187 return 0
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1188 if next <= now:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1189 out = DNSOutgoing(_FLAGS_QR_QUERY)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1190 out.addQuestion(DNSQuestion(self.name, _TYPE_SRV, _CLASS_IN))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1191 out.addAnswerAtTime(zeroconf.cache.getByDetails(self.name, _TYPE_SRV, _CLASS_IN), now)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1192 out.addQuestion(DNSQuestion(self.name, _TYPE_TXT, _CLASS_IN))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1193 out.addAnswerAtTime(zeroconf.cache.getByDetails(self.name, _TYPE_TXT, _CLASS_IN), now)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1194 if self.server is not None:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1195 out.addQuestion(DNSQuestion(self.server, _TYPE_A, _CLASS_IN))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1196 out.addAnswerAtTime(zeroconf.cache.getByDetails(self.server, _TYPE_A, _CLASS_IN), now)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1197 zeroconf.send(out)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1198 next = now + delay
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1199 delay = delay * 2
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1200
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1201 zeroconf.wait(min(next, last) - now)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1202 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1203 result = 1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1204 finally:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1205 zeroconf.removeListener(self)
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
1206
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1207 return result
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1208
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1209 def __eq__(self, other):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1210 """Tests equality of service name"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1211 if isinstance(other, ServiceInfo):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1212 return other.name == self.name
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1213 return 0
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1214
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1215 def __ne__(self, other):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1216 """Non-equality test"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1217 return not self.__eq__(other)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1218
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1219 def __repr__(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1220 """String representation"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1221 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
1222 if self.text is None:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1223 result += "None"
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1224 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1225 if len(self.text) < 20:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1226 result += self.text
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1227 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1228 result += self.text[:17] + "..."
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1229 result += "]"
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1230 return result
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
1231
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1232
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1233 class Zeroconf(object):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1234 """Implementation of Zeroconf Multicast DNS Service Discovery
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1235
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1236 Supports registration, unregistration, queries and browsing.
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1237 """
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1238 def __init__(self, bindaddress=None):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1239 """Creates an instance of the Zeroconf class, establishing
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1240 multicast communications, listening and reaping threads."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1241 globals()['_GLOBAL_DONE'] = 0
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1242 if bindaddress is None:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1243 self.intf = socket.gethostbyname(socket.gethostname())
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1244 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1245 self.intf = bindaddress
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1246 self.group = ('', _MDNS_PORT)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1247 self.socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1248 try:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1249 self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1250 self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1251 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1252 # SO_REUSEADDR should be equivalent to SO_REUSEPORT for
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1253 # multicast UDP sockets (p 731, "TCP/IP Illustrated,
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1254 # Volume 2"), but some BSD-derived systems require
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1255 # SO_REUSEPORT to be specified explicity. Also, not all
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1256 # versions of Python have SO_REUSEPORT available. So
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1257 # if you're on a BSD-based system, and haven't upgraded
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1258 # to Python 2.3 yet, you may find this library doesn't
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1259 # work as expected.
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1260 #
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1261 pass
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1262 self.socket.setsockopt(socket.SOL_IP, socket.IP_MULTICAST_TTL, 255)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1263 self.socket.setsockopt(socket.SOL_IP, socket.IP_MULTICAST_LOOP, 1)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1264 try:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1265 self.socket.bind(self.group)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1266 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1267 # Some versions of linux raise an exception even though
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1268 # the SO_REUSE* options have been set, so ignore it
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1269 #
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1270 pass
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
1271 #self.socket.setsockopt(socket.SOL_IP, socket.IP_MULTICAST_IF, socket.inet_aton(self.intf) + socket.inet_aton('0.0.0.0'))
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1272 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
1273
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1274 self.listeners = []
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1275 self.browsers = []
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1276 self.services = {}
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1277 self.servicetypes = {}
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.cache = DNSCache()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1280
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1281 self.condition = threading.Condition()
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
1282
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1283 self.engine = Engine(self)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1284 self.listener = Listener(self)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1285 self.reaper = Reaper(self)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1286
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1287 def isLoopback(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1288 return self.intf.startswith("127.0.0.1")
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1289
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1290 def isLinklocal(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1291 return self.intf.startswith("169.254.")
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1292
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1293 def wait(self, timeout):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1294 """Calling thread waits for a given number of milliseconds or
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1295 until notified."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1296 self.condition.acquire()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1297 self.condition.wait(timeout/1000)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1298 self.condition.release()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1299
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1300 def notifyAll(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1301 """Notifies all waiting threads"""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1302 self.condition.acquire()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1303 self.condition.notifyAll()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1304 self.condition.release()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1305
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1306 def getServiceInfo(self, type, name, timeout=3000):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1307 """Returns network's service information for a particular
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1308 name and type, or None if no service matches by the timeout,
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1309 which defaults to 3 seconds."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1310 info = ServiceInfo(type, name)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1311 if info.request(self, timeout):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1312 return info
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1313 return None
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1314
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1315 def addServiceListener(self, type, listener):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1316 """Adds a listener for a particular service type. This object
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1317 will then have its updateRecord method called when information
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1318 arrives for that type."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1319 self.removeServiceListener(listener)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1320 self.browsers.append(ServiceBrowser(self, type, listener))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1321
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1322 def removeServiceListener(self, listener):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1323 """Removes a listener from the set that is currently listening."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1324 for browser in self.browsers:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1325 if browser.listener == listener:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1326 browser.cancel()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1327 del(browser)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1328
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1329 def registerService(self, info, ttl=_DNS_TTL):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1330 """Registers service information to the network with a default TTL
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1331 of 60 seconds. Zeroconf will then respond to requests for
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1332 information for that service. The name of the service may be
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1333 changed if needed to make it unique on the network."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1334 self.checkService(info)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1335 self.services[info.name.lower()] = info
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1336 if self.servicetypes.has_key(info.type):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1337 self.servicetypes[info.type]+=1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1338 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1339 self.servicetypes[info.type]=1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1340 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1341 nextTime = now
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1342 i = 0
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1343 while i < 3:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1344 if now < nextTime:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1345 self.wait(nextTime - now)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1346 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1347 continue
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1348 out = DNSOutgoing(_FLAGS_QR_RESPONSE | _FLAGS_AA)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1349 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
1350 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
1351 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
1352 if info.address:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1353 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
1354 self.send(out)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1355 i += 1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1356 nextTime += _REGISTER_TIME
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1357
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1358 def unregisterService(self, info):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1359 """Unregister a service."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1360 try:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1361 del(self.services[info.name.lower()])
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1362 if self.servicetypes[info.type]>1:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1363 self.servicetypes[info.type]-=1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1364 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1365 del self.servicetypes[info.type]
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1366 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1367 pass
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1368 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1369 nextTime = now
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1370 i = 0
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1371 while i < 3:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1372 if now < nextTime:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1373 self.wait(nextTime - now)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1374 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1375 continue
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1376 out = DNSOutgoing(_FLAGS_QR_RESPONSE | _FLAGS_AA)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1377 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
1378 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
1379 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
1380 if info.address:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1381 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
1382 self.send(out)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1383 i += 1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1384 nextTime += _UNREGISTER_TIME
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1385
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1386 def unregisterAllServices(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1387 """Unregister all registered services."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1388 if len(self.services) > 0:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1389 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1390 nextTime = now
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1391 i = 0
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1392 while i < 3:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1393 if now < nextTime:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1394 self.wait(nextTime - now)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1395 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1396 continue
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1397 out = DNSOutgoing(_FLAGS_QR_RESPONSE | _FLAGS_AA)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1398 for info in self.services.values():
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1399 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
1400 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
1401 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
1402 if info.address:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1403 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
1404 self.send(out)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1405 i += 1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1406 nextTime += _UNREGISTER_TIME
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1407
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1408 def checkService(self, info):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1409 """Checks the network for a unique service name, modifying the
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1410 ServiceInfo passed in if it is not unique."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1411 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1412 nextTime = now
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1413 i = 0
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1414 while i < 3:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1415 for record in self.cache.entriesWithName(info.type):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1416 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
1417 if (info.name.find('.') < 0):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1418 info.name = info.name + ".[" + info.address + ":" + info.port + "]." + info.type
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1419 self.checkService(info)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1420 return
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1421 raise NonUniqueNameException
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1422 if now < nextTime:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1423 self.wait(nextTime - now)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1424 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1425 continue
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1426 out = DNSOutgoing(_FLAGS_QR_QUERY | _FLAGS_AA)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1427 self.debug = out
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1428 out.addQuestion(DNSQuestion(info.type, _TYPE_PTR, _CLASS_IN))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1429 out.addAuthorativeAnswer(DNSPointer(info.type, _TYPE_PTR, _CLASS_IN, _DNS_TTL, info.name))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1430 self.send(out)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1431 i += 1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1432 nextTime += _CHECK_TIME
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1433
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1434 def addListener(self, listener, question):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1435 """Adds a listener for a given question. The listener will have
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1436 its updateRecord method called when information is available to
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1437 answer the question."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1438 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1439 self.listeners.append(listener)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1440 if question is not None:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1441 for record in self.cache.entriesWithName(question.name):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1442 if question.answeredBy(record) and not record.isExpired(now):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1443 listener.updateRecord(self, now, record)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1444 self.notifyAll()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1445
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1446 def removeListener(self, listener):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1447 """Removes a listener."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1448 try:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1449 self.listeners.remove(listener)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1450 self.notifyAll()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1451 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1452 pass
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1453
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1454 def updateRecord(self, now, rec):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1455 """Used to notify listeners of new information that has updated
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1456 a record."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1457 for listener in self.listeners:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1458 listener.updateRecord(self, now, rec)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1459 self.notifyAll()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1460
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1461 def handleResponse(self, msg):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1462 """Deal with incoming response packets. All answers
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1463 are held in the cache, and listeners are notified."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1464 now = currentTimeMillis()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1465 for record in msg.answers:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1466 expired = record.isExpired(now)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1467 if record in self.cache.entries():
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1468 if expired:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1469 self.cache.remove(record)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1470 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1471 entry = self.cache.get(record)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1472 if entry is not None:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1473 entry.resetTTL(record)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1474 record = entry
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 self.cache.add(record)
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
1477
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1478 self.updateRecord(now, record)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1479
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1480 def handleQuery(self, msg, addr, port):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1481 """Deal with incoming query packets. Provides a response if
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1482 possible."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1483 out = None
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 # Support unicast client responses
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1486 #
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1487 if port != _MDNS_PORT:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1488 out = DNSOutgoing(_FLAGS_QR_RESPONSE | _FLAGS_AA, 0)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1489 for question in msg.questions:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1490 out.addQuestion(question)
7874
d812029cda85 cleanup: drop variables for unused return values
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7071
diff changeset
1491
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1492 for question in msg.questions:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1493 if question.type == _TYPE_PTR:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1494 if question.name == "_services._dns-sd._udp.local.":
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1495 for stype in self.servicetypes.keys():
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1496 if out is None:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1497 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
1498 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
1499 for service in self.services.values():
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1500 if question.name == service.type:
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)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1503 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
1504 else:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1505 try:
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)
7874
d812029cda85 cleanup: drop variables for unused return values
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7071
diff changeset
1508
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1509 # Answer A record queries for any service addresses we know
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1510 if question.type == _TYPE_A or question.type == _TYPE_ANY:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1511 for service in self.services.values():
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1512 if service.server == question.name.lower():
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1513 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
1514
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1515 service = self.services.get(question.name.lower(), None)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1516 if not service: continue
7874
d812029cda85 cleanup: drop variables for unused return values
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7071
diff changeset
1517
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1518 if question.type == _TYPE_SRV or question.type == _TYPE_ANY:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1519 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
1520 if question.type == _TYPE_TXT or question.type == _TYPE_ANY:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1521 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
1522 if question.type == _TYPE_SRV:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1523 out.addAdditionalAnswer(DNSAddress(service.server, _TYPE_A, _CLASS_IN | _CLASS_UNIQUE, _DNS_TTL, service.address))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1524 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1525 traceback.print_exc()
7874
d812029cda85 cleanup: drop variables for unused return values
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7071
diff changeset
1526
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1527 if out is not None and out.answers:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1528 out.id = msg.id
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1529 self.send(out, addr, port)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1530
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1531 def send(self, out, addr = _MDNS_ADDR, port = _MDNS_PORT):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1532 """Sends an outgoing packet."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1533 # 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
1534 #temp = DNSIncoming(out.packet())
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1535 try:
7874
d812029cda85 cleanup: drop variables for unused return values
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7071
diff changeset
1536 self.socket.sendto(out.packet(), 0, (addr, port))
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1537 except:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1538 # Ignore this, it may be a temporary loss of network connection
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1539 pass
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1540
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1541 def close(self):
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1542 """Ends the background threads, and prevent this instance from
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1543 servicing further queries."""
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1544 if globals()['_GLOBAL_DONE'] == 0:
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1545 globals()['_GLOBAL_DONE'] = 1
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1546 self.notifyAll()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1547 self.engine.notify()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1548 self.unregisterAllServices()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1549 self.socket.setsockopt(socket.SOL_IP, socket.IP_DROP_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
1550 self.socket.close()
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
1551
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1552 # Test a few module features, including service registration, service
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1553 # query (for Zoe), and service unregistration.
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1554
7877
eba7f12b0c51 cleanup: whitespace cleanup
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 7874
diff changeset
1555 if __name__ == '__main__':
7071
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1556 print "Multicast DNS Service Discovery for Python, version", __version__
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1557 r = Zeroconf()
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1558 print "1. Testing registration of a service..."
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1559 desc = {'version':'0.10','a':'test value', 'b':'another value'}
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1560 info = ServiceInfo("_http._tcp.local.", "My Service Name._http._tcp.local.", socket.inet_aton("127.0.0.1"), 1234, 0, 0, desc)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1561 print " Registering service..."
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1562 r.registerService(info)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1563 print " Registration done."
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1564 print "2. Testing query of service information..."
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1565 print " Getting ZOE service:", str(r.getServiceInfo("_http._tcp.local.", "ZOE._http._tcp.local."))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1566 print " Query done."
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1567 print "3. Testing query of own service..."
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1568 print " Getting self:", str(r.getServiceInfo("_http._tcp.local.", "My Service Name._http._tcp.local."))
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1569 print " Query done."
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1570 print "4. Testing unregister of service information..."
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1571 r.unregisterService(info)
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1572 print " Unregister done."
643c751e60b2 zeroconf: initial implementation
Matt Mackall <mpm@selenic.com>
parents:
diff changeset
1573 r.close()