Mercurial > hg > nginx-tests
annotate http_resolver.t @ 436:4984dac109db
Tests: added test for resolver resend.
author | Sergey Kandaurov <pluknet@nginx.com> |
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date | Wed, 16 Jul 2014 13:08:33 +0400 |
parents | 847ea345becb |
children | 60888e2c3f5a |
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1 #!/usr/bin/perl |
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2 |
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3 # (C) Sergey Kandaurov |
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4 # (C) Nginx, Inc. |
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5 |
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6 # Tests for http resolver. |
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7 |
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8 ############################################################################### |
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9 |
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10 use warnings; |
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11 use strict; |
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12 |
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13 use Test::More; |
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14 |
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15 BEGIN { use FindBin; chdir($FindBin::Bin); } |
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16 |
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17 use lib 'lib'; |
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18 use Test::Nginx; |
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19 |
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20 ############################################################################### |
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21 |
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22 select STDERR; $| = 1; |
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23 select STDOUT; $| = 1; |
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24 |
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25 my $t = Test::Nginx->new()->has(qw/http proxy rewrite/); |
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26 |
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27 $t->write_file_expand('nginx.conf', <<'EOF'); |
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28 |
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29 %%TEST_GLOBALS%% |
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30 |
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31 daemon off; |
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32 |
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33 events { |
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34 } |
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35 |
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36 http { |
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37 %%TEST_GLOBALS_HTTP%% |
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38 |
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39 server { |
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40 listen 127.0.0.1:8080; |
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41 server_name localhost; |
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42 |
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43 location / { |
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44 resolver 127.0.0.1:8081; |
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45 resolver_timeout 1s; |
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46 proxy_pass http://$host:8080/backend; |
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47 |
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48 proxy_next_upstream http_504 timeout error; |
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49 proxy_intercept_errors on; |
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50 proxy_connect_timeout 1s; |
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51 error_page 504 502 /50x; |
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52 } |
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53 location /two { |
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54 resolver 127.0.0.1:8081 127.0.0.1:8082; |
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55 proxy_pass http://$host:8080/backend; |
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56 } |
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57 location /valid { |
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58 resolver 127.0.0.1:8081 valid=3s; |
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59 proxy_pass http://$host:8080/backend; |
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60 } |
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61 location /case { |
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62 resolver 127.0.0.1:8081; |
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63 proxy_pass http://$http_x_name:8080/backend; |
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64 } |
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65 location /invalid { |
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66 proxy_pass http://$host:8080/backend; |
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67 } |
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68 location /resend { |
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69 resolver 127.0.0.1:8081; |
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70 resolver_timeout 6s; |
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71 proxy_pass http://$host:8080/backend; |
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72 } |
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73 |
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74 location /backend { |
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75 return 200; |
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76 } |
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77 location /50x { |
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78 return 200 $upstream_addr; |
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79 } |
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80 } |
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81 } |
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82 |
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83 EOF |
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84 |
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85 $t->run_daemon(\&dns_daemon, 8081, $t); |
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86 $t->run_daemon(\&dns_daemon, 8082, $t); |
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87 |
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88 $t->run()->plan(31); |
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89 |
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90 $t->waitforfile($t->testdir . '/8081'); |
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91 $t->waitforfile($t->testdir . '/8082'); |
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92 |
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93 ############################################################################### |
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94 |
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95 # schedule resend test, which takes abound 5 seconds to complete |
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96 |
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97 my $s = http_start('id.example.net', '/resend'); |
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98 |
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99 like(http_host_header('a.example.net', '/'), qr/200 OK/, 'A'); |
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100 |
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101 # ensure that resolver serves queries from cache in a case-insensitive manner |
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102 # we check this by marking 2nd and subsequent queries on backend with SERVFAIL |
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103 |
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104 http_x_name_header('case.example.net', '/case'); |
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105 like(http_x_name_header('CASE.example.net', '/case'), qr/200 OK/, |
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106 'A case-insensitive'); |
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107 |
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108 like(http_host_header('awide.example.net', '/'), qr/200 OK/, 'A uncompressed'); |
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109 like(http_host_header('short.example.net', '/'), qr/502 Bad/, |
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110 'A short dns response'); |
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111 |
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112 like(http_host_header('nx.example.net', '/'), qr/502 Bad/, 'NXDOMAIN'); |
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113 like(http_host_header('cname.example.net', '/'), qr/200 OK/, 'CNAME'); |
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114 like(http_host_header('cname.example.net', '/'), qr/200 OK/, |
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115 'CNAME cached'); |
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116 |
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117 # CNAME + A combined answer |
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118 # demonstrates the name in answer section different from what is asked |
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119 |
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120 like(http_host_header('cname_a.example.net', '/'), qr/200 OK/, 'CNAME + A'); |
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121 |
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122 # CNAME refers to non-existing A |
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123 |
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124 like(http_host_header('cname2.example.net', '/'), qr/502 Bad/, 'CNAME bad'); |
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125 like(http_host_header('long.example.net', '/'), qr/200 OK/, 'long label'); |
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126 like(http_host_header('long2.example.net', '/'), qr/200 OK/, 'long name'); |
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127 |
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128 # take into account DNAME |
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129 |
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130 like(http_host_header('alias.example.com', '/'), qr/200 OK/, 'DNAME'); |
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131 |
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132 # many A records in round robin |
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133 # nonexisting IPs enumerated with proxy_next_upstream |
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134 |
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135 like(http_host_header('many.example.net', '/'), |
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136 qr/^127.0.0.20(1:8080, 127.0.0.202:8080|2:8080, 127.0.0.201:8080)$/m, |
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137 'A many'); |
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138 |
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139 like(http_host_header('many.example.net', '/'), |
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140 qr/^127.0.0.20(1:8080, 127.0.0.202:8080|2:8080, 127.0.0.201:8080)$/m, |
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141 'A many cached'); |
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142 |
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143 # tests for several resolvers specified in directive |
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144 # query bad ns, make sure that error responses are not cached |
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145 |
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146 like(http_host_header('2.example.net', '/two'), qr/502 Bad/, 'two ns bad'); |
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147 |
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148 # now get correct response |
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149 |
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150 like(http_host_header('2.example.net', '/two'), qr/200 OK/, 'two ns good'); |
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151 |
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152 # response is cached, actual request would get error |
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153 |
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154 like(http_host_header('2.example.net', '/two'), qr/200 OK/, 'two ns cached'); |
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155 |
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156 # ttl tested with 1st req good and 2nd req bad |
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157 # send 1st request and cache its good response |
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158 |
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159 like(http_host_header('ttl.example.net', '/'), qr/200 OK/, 'ttl'); |
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160 |
359
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161 # response is cached, actual request would get error |
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162 |
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163 like(http_host_header('ttl.example.net', '/'), qr/200 OK/, 'ttl cached 1'); |
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164 like(http_host_header('ttl.example.net', '/'), qr/200 OK/, 'ttl cached 2'); |
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165 |
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166 sleep 2; |
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167 |
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168 # expired ttl causes nginx to make actual query |
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169 |
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170 like(http_host_header('ttl.example.net', '/'), qr/502 Bad/, 'ttl expired'); |
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171 |
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172 # zero ttl prohibits response caching |
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173 |
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174 like(http_host_header('ttl0.example.net', '/'), qr/200 OK/, 'zero ttl'); |
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175 |
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176 TODO: { |
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177 local $TODO = 'support for zero ttl'; |
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178 |
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179 like(http_host_header('ttl0.example.net', '/'), qr/502 Bad/, |
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180 'zero ttl not cached'); |
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181 |
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182 } |
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183 |
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184 # "valid" parameter tested with 1st req good and 2nd req bad |
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185 # send 1st request and cache its good response |
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186 |
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187 like(http_host_header('ttl.example.net', '/valid'), qr/200 OK/, 'valid'); |
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188 |
359
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189 # response is cached, actual request would get error |
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190 |
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191 like(http_host_header('ttl.example.net', '/valid'), qr/200 OK/, |
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192 'valid cached 1'); |
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193 like(http_host_header('ttl.example.net', '/valid'), qr/200 OK/, |
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194 'valid cached 2'); |
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195 |
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196 sleep 2; |
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197 |
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198 # expired ttl is overridden with "valid" parameter |
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199 # response is taken from cache |
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200 |
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201 like(http_host_header('ttl.example.net', '/valid'), qr/200 OK/, |
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202 'valid overrides ttl'); |
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203 |
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204 sleep 2; |
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205 |
359
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206 # expired "valid" value causes nginx to make actual query |
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207 |
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208 like(http_host_header('ttl.example.net', '/valid'), qr/502 Bad/, |
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209 'valid expired'); |
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210 |
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211 # Ensure that resolver respects expired CNAME in CNAME + A combined response. |
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212 # When ttl in CNAME is expired, the answer should not be served from cache. |
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213 # Catch this by returning SERVFAIL on the 2nd and subsequent queries. |
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214 |
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215 http_host_header('cname_a_ttl2.example.net', '/'); |
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216 |
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217 sleep 2; |
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218 |
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219 like(http_host_header('cname_a_ttl2.example.net', '/'), qr/502 Bad/, |
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220 'CNAME + A with expired CNAME ttl'); |
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221 |
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222 like(http_host_header('example.net', '/invalid'), qr/502 Bad/, 'no resolver'); |
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223 |
436
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224 TODO: { |
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225 local $TODO = 'not yet' unless $t->has_version('1.7.4'); |
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226 |
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227 like(http_end($s), qr/200 OK/, 'resend after malformed response'); |
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228 |
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229 } |
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230 |
352
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231 ############################################################################### |
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232 |
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233 sub http_host_header { |
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234 my ($host, $uri) = @_; |
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235 return http(<<EOF); |
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236 GET $uri HTTP/1.0 |
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237 Host: $host |
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238 |
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239 EOF |
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240 } |
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241 |
362
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242 sub http_x_name_header { |
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243 my ($host, $uri) = @_; |
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244 return http(<<EOF); |
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245 GET $uri HTTP/1.0 |
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246 X-Name: $host |
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247 |
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248 EOF |
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249 } |
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250 |
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251 sub http_start { |
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252 my ($host, $uri) = @_; |
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253 |
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254 my $s; |
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255 my $request = <<EOF; |
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256 GET $uri HTTP/1.0 |
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257 Host: $host |
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258 |
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259 EOF |
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260 |
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261 eval { |
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262 local $SIG{ALRM} = sub { die "timeout\n" }; |
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263 local $SIG{PIPE} = sub { die "sigpipe\n" }; |
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264 alarm(5); |
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265 $s = IO::Socket::INET->new( |
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266 Proto => 'tcp', |
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267 PeerAddr => '127.0.0.1:8080' |
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268 ); |
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269 log_out($request); |
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270 $s->print($request); |
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271 alarm(0); |
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272 }; |
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273 alarm(0); |
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274 if ($@) { |
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275 log_in("died: $@"); |
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276 return undef; |
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277 } |
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278 return $s; |
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279 } |
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280 |
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281 sub http_end { |
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282 my ($s) = @_; |
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283 my $reply; |
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284 |
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285 eval { |
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286 local $SIG{ALRM} = sub { die "timeout\n" }; |
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287 local $SIG{PIPE} = sub { die "sigpipe\n" }; |
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288 alarm(3); |
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289 local $/; |
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290 $reply = $s->getline(); |
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291 log_in($reply); |
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292 alarm(0); |
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293 }; |
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294 alarm(0); |
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295 if ($@) { |
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296 log_in("died: $@"); |
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297 return undef; |
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298 } |
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299 return $reply; |
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300 } |
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301 |
352
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302 ############################################################################### |
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303 |
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304 sub reply_handler { |
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305 my ($recv_data, $port, $state) = @_; |
357
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306 |
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307 my (@name, @rdata); |
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308 |
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309 use constant NOERROR => 0; |
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310 use constant SERVFAIL => 2; |
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311 use constant NXDOMAIN => 3; |
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312 |
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313 use constant A => 1; |
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314 use constant CNAME => 5; |
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315 use constant DNAME => 39; |
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316 |
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317 use constant IN => 1; |
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318 |
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319 # default values |
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320 |
357
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321 my ($hdr, $rcode, $ttl) = (0x8180, NOERROR, 3600); |
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322 |
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323 # decode name |
352
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324 |
357
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325 my ($len, $offset) = (undef, 12); |
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326 while (1) { |
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327 $len = unpack("\@$offset C", $recv_data); |
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328 last if $len == 0; |
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329 $offset++; |
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330 push @name, unpack("\@$offset A$len", $recv_data); |
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331 $offset += $len; |
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332 } |
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333 |
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334 $offset -= 1; |
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335 my ($id, $type, $class) = unpack("n x$offset n2", $recv_data); |
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336 |
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337 my $name = join('.', @name); |
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338 if (($name eq 'a.example.net') || ($name eq 'alias.example.net')) { |
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339 if ($type == A || $type == CNAME) { |
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340 push @rdata, rd_addr($ttl, '127.0.0.1'); |
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341 } |
352
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342 |
362
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343 } elsif ($name eq 'case.example.net' && $type == A) { |
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344 if (++$state->{casecnt} > 1) { |
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345 $rcode = SERVFAIL; |
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346 } |
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347 |
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348 push @rdata, rd_addr($ttl, '127.0.0.1'); |
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349 |
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350 } elsif ($name eq 'id.example.net' && $type == A) { |
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351 if (++$state->{idcnt} == 1) { |
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352 $id++; |
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353 } |
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354 |
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355 push @rdata, rd_addr($ttl, '127.0.0.1'); |
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356 |
362
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357 } elsif ($name eq 'awide.example.net' && $type == A) { |
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358 push @rdata, pack '(w/a*)3x n2N nC4', |
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359 ('awide', 'example', 'net'), A, IN, $ttl, |
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360 4, (127, 0, 0, 1); |
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361 |
359
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362 } elsif (($name eq 'many.example.net') && $type == A) { |
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363 $state->{manycnt}++; |
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364 if ($state->{manycnt} > 1) { |
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365 $rcode = SERVFAIL; |
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366 } |
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367 |
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368 push @rdata, rd_addr($ttl, '127.0.0.201'); |
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369 push @rdata, rd_addr($ttl, '127.0.0.202'); |
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370 |
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371 |
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372 } elsif (($name eq 'short.example.net')) { |
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373 # zero length RDATA in DNS response |
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374 |
359
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375 if ($type == A) { |
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376 push @rdata, rd_addr($ttl, ''); |
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377 } |
352
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378 |
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379 } elsif (($name eq 'alias.example.com')) { |
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380 # example.com. 3600 IN DNAME example.net. |
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381 |
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382 my @dname = ('example', 'net'); |
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383 my $rdlen = length(join '', @dname) + @dname + 1; |
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384 push @rdata, pack("n3N n(w/a*)* x", 0xc012, DNAME, IN, $ttl, |
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385 $rdlen, @dname); |
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386 |
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387 # alias.example.com. 3600 IN CNAME alias.example.net. |
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388 |
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389 push @rdata, pack("n3N nCa5n", 0xc00c, CNAME, IN, $ttl, |
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390 8, 5, 'alias', 0xc02f); |
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391 |
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392 } elsif ($name eq 'cname.example.net') { |
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393 $state->{cnamecnt}++; |
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394 if ($state->{cnamecnt} > 2) { |
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395 $rcode = SERVFAIL; |
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396 } |
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397 push @rdata, pack("n3N nCa5n", 0xc00c, CNAME, IN, $ttl, |
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398 8, 5, 'alias', 0xc012); |
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399 |
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400 } elsif ($name eq 'cname_a.example.net') { |
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401 push @rdata, pack("n3N nCa5n", 0xc00c, CNAME, IN, $ttl, |
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402 8, 5, 'alias', 0xc014); |
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403 |
357
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404 # points to "alias" set in previous rdata |
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405 |
359
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406 if ($type == A) { |
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407 push @rdata, pack('n3N nC4', 0xc031, A, IN, $ttl, |
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408 4, split(/\./, '127.0.0.1')); |
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409 } |
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410 |
362
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411 } elsif ($name eq 'cname_a_ttl2.example.net' && $type == A) { |
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412 push @rdata, pack("n3N nCa18n", 0xc00c, CNAME, IN, 1, |
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413 21, 18, 'cname_a_ttl2_alias', 0xc019); |
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414 if (++$state->{cttl2cnt} >= 2) { |
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415 $rcode = SERVFAIL; |
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416 } |
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417 push @rdata, pack('n3N nC4', 0xc036, A, IN, $ttl, |
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418 4, split(/\./, '127.0.0.1')); |
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419 |
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420 } elsif ($name eq 'cname_a_ttl_alias.example.net' && $type == A) { |
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421 push @rdata, rd_addr($ttl, '127.0.0.1'); |
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422 |
352
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423 } elsif ($name eq 'cname2.example.net') { |
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424 # points to non-existing A |
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425 |
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426 push @rdata, pack("n3N nCa2n", 0xc00c, CNAME, IN, $ttl, |
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427 5, 2, 'nx', 0xc02f); |
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428 |
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429 } elsif ($name eq 'long.example.net') { |
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430 push @rdata, pack("n3N nCA63x", 0xc00c, CNAME, IN, $ttl, |
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431 65, 63, 'a' x 63); |
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432 |
359
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433 } elsif (($name eq 'a' x 63) && $type == A) { |
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434 push @rdata, rd_addr($ttl, '127.0.0.1'); |
352
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435 |
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436 } elsif ($name eq 'long2.example.net') { |
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437 push @rdata, pack("n3N n(CA63)4x", 0xc00c, CNAME, IN, $ttl, 257, |
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|
438 63, 'a' x 63, 63, 'a' x 63, 63, 'a' x 63, 63, 'a' x 63); |
352
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|
439 |
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440 } elsif (($name eq 'a' x 63 . '.' . 'a' x 63 . '.' . 'a' x 63 . '.' |
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441 . 'a' x 63) && $type == A) |
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|
442 { |
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443 push @rdata, rd_addr($ttl, '127.0.0.1'); |
352
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444 |
359
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445 } elsif ($name eq 'ttl.example.net' && $type == A) { |
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446 $state->{ttlcnt}++; |
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447 if ($state->{ttlcnt} == 2 || $state->{ttlcnt} == 4) { |
357
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448 $rcode = SERVFAIL; |
352
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|
449 } |
357
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450 |
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451 push @rdata, rd_addr(1, '127.0.0.1'); |
352
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452 |
359
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453 } elsif ($name eq 'ttl0.example.net' && $type == A) { |
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|
454 $state->{ttl0cnt}++; |
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455 if ($state->{ttl0cnt} == 2) { |
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|
456 $rcode = SERVFAIL; |
352
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|
457 } |
357
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|
458 |
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459 push @rdata, rd_addr(0, '127.0.0.1'); |
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|
460 |
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461 } elsif ($name eq '2.example.net') { |
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|
462 if ($port == 8081) { |
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|
463 $state->{twocnt}++; |
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464 } |
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|
465 if ($state->{twocnt} & 1) { |
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466 $rcode = SERVFAIL; |
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|
467 } |
357
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|
468 |
359
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469 if ($type == A) { |
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|
470 push @rdata, rd_addr($ttl, '127.0.0.1'); |
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|
471 } |
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|
472 } |
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|
473 |
357
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|
474 $len = @name; |
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475 pack("n6 (w/a*)$len x n2", $id, $hdr | $rcode, 1, scalar @rdata, |
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476 0, 0, @name, $type, $class) . join('', @rdata); |
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477 } |
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478 |
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479 sub rd_addr { |
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480 my ($ttl, $addr) = @_; |
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481 |
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482 my $code = 'split(/\./, $addr)'; |
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483 |
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484 return pack 'n3N', 0xc00c, A, IN, $ttl if $addr eq ''; |
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485 |
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486 pack 'n3N nC4', 0xc00c, A, IN, $ttl, eval "scalar $code", eval($code); |
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487 } |
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488 |
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489 sub dns_daemon { |
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490 my ($port, $t) = @_; |
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491 |
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492 my ($data, $recv_data); |
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493 my $socket = IO::Socket::INET->new( |
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494 LocalAddr => '127.0.0.1', |
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495 LocalPort => $port, |
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496 Proto => 'udp', |
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497 ) |
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498 or die "Can't create listening socket: $!\n"; |
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499 |
359
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500 # track number of relevant queries |
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501 |
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502 my %state = ( |
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503 cnamecnt => 0, |
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504 twocnt => 0, |
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505 ttlcnt => 0, |
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506 ttl0cnt => 0, |
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507 cttlcnt => 0, |
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508 cttl2cnt => 0, |
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509 manycnt => 0, |
362
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510 casecnt => 0, |
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511 idcnt => 0, |
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512 ); |
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513 |
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514 # signal we are ready |
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515 |
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516 open my $fh, '>', $t->testdir() . '/' . $port; |
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517 close $fh; |
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518 |
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519 while (1) { |
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520 $socket->recv($recv_data, 65536); |
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521 $data = reply_handler($recv_data, $port, \%state); |
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522 $socket->send($data); |
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523 } |
352
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524 } |
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525 |
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526 ############################################################################### |