Mercurial > hg > nginx-tests
annotate http_resolver.t @ 357:e0c00e695cb5
Tests: removed Net::DNS dependency.
author | Sergey Kandaurov <pluknet@nginx.com> |
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date | Fri, 22 Nov 2013 15:20:16 +0400 |
parents | 7a472e46772c |
children | cdab739eb6ea |
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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 ipv6/); |
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26 |
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27 $t->write_file_expand('nginx.conf', <<'EOF'); |
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28 |
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29 %%TEST_GLOBALS%% |
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30 |
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31 daemon off; |
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32 |
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33 events { |
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34 } |
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35 |
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36 http { |
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37 %%TEST_GLOBALS_HTTP%% |
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38 |
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39 server { |
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40 listen 127.0.0.1:8080; |
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41 listen [::1]:8080; |
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42 server_name localhost; |
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43 |
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44 location / { |
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45 resolver 127.0.0.1:8081; |
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46 # to lower resolving delay for unsupported AAAA |
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47 resolver_timeout 1s; |
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48 proxy_pass http://$host:8080/backend; |
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49 } |
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50 location /cached { |
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51 resolver 127.0.0.1:8081 127.0.0.1:8082; |
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52 proxy_pass http://$host:8080/backend; |
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53 } |
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54 location /two { |
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55 resolver 127.0.0.1:8081 127.0.0.1:8082; |
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56 resolver_timeout 2s; |
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57 proxy_pass http://$host:8080/backend; |
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58 } |
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59 location /valid { |
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60 resolver 127.0.0.1:8081 127.0.0.1:8082 valid=3s; |
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61 resolver_timeout 2s; |
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62 proxy_pass http://$host:8080/backend; |
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63 } |
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64 location /invalid { |
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65 proxy_pass http://$host:8080/backend; |
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66 } |
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67 location /many { |
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68 resolver 127.0.0.1:8081 127.0.0.1:8082; |
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69 resolver_timeout 2s; |
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70 proxy_pass http://$host:8080/backend; |
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71 proxy_next_upstream http_504 timeout error; |
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72 proxy_intercept_errors on; |
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73 proxy_connect_timeout 2s; |
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74 error_page 504 502 /50x; |
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75 } |
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76 |
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77 location /backend { |
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78 return 200; |
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79 } |
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80 location /50x { |
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81 return 200 $upstream_addr; |
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82 } |
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83 } |
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84 } |
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85 |
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86 EOF |
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87 |
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88 eval { |
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89 open OLDERR, ">&", \*STDERR; close STDERR; |
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90 $t->run(); |
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91 open STDERR, ">&", \*OLDERR; |
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92 }; |
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93 plan(skip_all => 'no inet6 support') if $@; |
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94 |
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95 $t->run_daemon(\&dns_daemon, 8081, $t); |
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96 $t->run_daemon(\&dns_daemon, 8082, $t); |
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97 |
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98 $t->waitforfile($t->testdir . '/8081'); |
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99 $t->waitforfile($t->testdir . '/8082'); |
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100 |
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101 $t->plan(28); |
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102 |
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103 ############################################################################### |
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104 |
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105 like(http_host_header('a.example.net', '/'), qr/200 OK/, 'A'); |
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106 like(http_host_header('short.example.net', '/'), qr/502 Bad/, |
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107 'A short dns response'); |
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108 |
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109 TODO: { |
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110 local $TODO = 'support for AAAA'; |
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111 |
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112 like(http_host_header('aaaa.example.net', '/'), qr/200 OK/, 'AAAA'); |
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113 |
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114 } |
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115 |
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116 like(http_host_header('nx.example.net', '/'), qr/502 Bad/, 'NXDOMAIN'); |
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117 like(http_host_header('cname.example.net', '/cached'), qr/200 OK/, 'CNAME'); |
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118 like(http_host_header('cname.example.net', '/cached'), qr/200 OK/, |
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119 'CNAME cached'); |
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120 |
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121 # CNAME + A combined answer |
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122 # demonstrates the name in answer section different from what is asked |
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123 |
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124 like(http_host_header('cname_a.example.net', '/'), qr/200 OK/, 'CNAME + A'); |
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125 |
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126 # CNAME refers to non-existing A |
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127 |
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128 like(http_host_header('cname2.example.net', '/'), qr/502 Bad/, 'CNAME bad'); |
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129 like(http_host_header('long.example.net', '/'), qr/200 OK/, 'long label'); |
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130 like(http_host_header('long2.example.net', '/'), qr/200 OK/, 'long name'); |
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131 |
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132 # take into account DNAME |
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133 |
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134 like(http_host_header('alias.example.com', '/'), qr/200 OK/, 'DNAME'); |
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135 |
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136 # many A records in round robin |
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137 # nonexisting IPs enumerated with proxy_next_upstream |
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138 |
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139 like(http_host_header('many.example.net', '/many'), |
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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'); |
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142 |
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143 like(http_host_header('many.example.net', '/many'), |
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144 qr/^127.0.0.20(1:8080, 127.0.0.202:8080|2:8080, 127.0.0.201:8080)$/m, |
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145 'A many cached'); |
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146 |
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147 # several resolver addresses with 1st ns bad |
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148 # query bad ns, negative responses are not cached |
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149 |
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150 like(http_host_header('2.example.net', '/two'), qr/502 Bad/, 'two ns bad'); |
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151 |
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152 # query alive ns |
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153 |
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154 like(http_host_header('2.example.net', '/two'), qr/200 OK/, 'two ns good'); |
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155 |
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156 # cached response prevents querying the next (bad) ns again |
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157 |
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158 like(http_host_header('2.example.net', '/two'), qr/200 OK/, 'two ns cached'); |
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159 |
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160 # ttl tested with 1st ns good and 2nd ns bad |
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161 # query good ns and cache response |
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162 |
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163 like(http_host_header('ttl.example.net', '/two'), qr/200 OK/, 'ttl'); |
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164 |
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165 # cached response prevents querying the next (bad) ns |
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166 |
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167 like(http_host_header('ttl.example.net', '/two'), qr/200 OK/, 'ttl cached 1'); |
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168 like(http_host_header('ttl.example.net', '/two'), qr/200 OK/, 'ttl cached 2'); |
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169 |
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170 sleep 2; |
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171 |
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172 # expired ttl causes nginx to query the next (bad) ns |
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173 |
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174 like(http_host_header('ttl.example.net', '/two'), qr/502 Bad/, 'ttl expired'); |
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175 |
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176 # zero ttl prohibits response caching |
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177 |
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178 like(http_host_header('ttl0.example.net', '/two'), qr/200 OK/, 'zero ttl'); |
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179 |
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180 TODO: { |
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181 local $TODO = 'support for zero ttl'; |
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182 |
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183 like(http_host_header('ttl0.example.net', '/two'), qr/502 Bad/, |
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184 'zero ttl not cached'); |
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185 |
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186 } |
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187 |
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188 # "valid" parameter tested with 1st alive ns and 2nd bad ns |
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189 # query alive ns, and cache response |
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190 |
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191 like(http_host_header('ttl.example.net', '/valid'), qr/200 OK/, 'valid'); |
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192 |
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193 # cached response prevents querying the next (bad) ns |
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194 |
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195 like(http_host_header('ttl.example.net', '/valid'), qr/200 OK/, |
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196 'valid cached 1'); |
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197 like(http_host_header('ttl.example.net', '/valid'), qr/200 OK/, |
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198 'valid cached 2'); |
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199 |
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200 sleep 2; |
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201 |
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202 # expired ttl is overridden with "valid" parameter |
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203 # response is taken from cache |
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204 |
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205 like(http_host_header('ttl.example.net', '/valid'), qr/200 OK/, |
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206 'valid overrides ttl'); |
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207 |
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208 sleep 2; |
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209 |
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210 # expired "valid" value causes nginx to query the next (bad) ns |
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211 |
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212 like(http_host_header('ttl.example.net', '/valid'), qr/502 Bad/, |
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213 'valid expired'); |
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214 |
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215 like(http_host_header('example.net', '/invalid'), qr/502 Bad/, 'no resolver'); |
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216 |
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217 ############################################################################### |
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218 |
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219 sub http_host_header { |
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220 my ($host, $uri) = @_; |
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221 return http(<<EOF); |
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222 GET $uri HTTP/1.0 |
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223 Host: $host |
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224 |
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225 EOF |
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226 } |
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227 |
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228 ############################################################################### |
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229 |
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230 sub reply_handler { |
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231 my ($recv_data, $port) = @_; |
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232 |
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233 my (@name, @rdata); |
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234 |
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235 use constant NOERROR => 0; |
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236 use constant SERVFAIL => 2; |
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237 use constant NXDOMAIN => 3; |
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238 |
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239 use constant A => 1; |
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240 use constant CNAME => 5; |
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241 use constant AAAA => 28; |
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242 use constant DNAME => 39; |
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243 |
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244 use constant IN => 1; |
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245 |
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246 # default values |
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247 |
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248 my ($hdr, $rcode, $ttl) = (0x8180, NOERROR, 3600); |
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249 |
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250 # decode name |
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251 |
357
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252 my ($len, $offset) = (undef, 12); |
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253 while (1) { |
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254 $len = unpack("\@$offset C", $recv_data); |
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255 last if $len == 0; |
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256 $offset++; |
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257 push @name, unpack("\@$offset A$len", $recv_data); |
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258 $offset += $len; |
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259 } |
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260 |
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261 $offset -= 1; |
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262 my ($id, $type, $class) = unpack("n x$offset n2", $recv_data); |
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263 |
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264 my $name = join('.', @name); |
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265 if (($name eq 'a.example.net') || ($name eq 'alias.example.net')) { |
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266 push @rdata, rd_addr($ttl, '127.0.0.1'); |
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267 |
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268 } elsif (($name eq 'many.example.net')) { |
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269 if ($port == 8082) { |
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270 $rcode = SERVFAIL; |
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271 } |
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272 |
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273 push @rdata, rd_addr($ttl, '127.0.0.201'); |
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274 push @rdata, rd_addr($ttl, '127.0.0.202'); |
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275 |
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276 } elsif (($name eq 'aaaa.example.net')) { |
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277 # AAAA [::1] |
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278 |
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279 push @rdata, pack('n3N nx15C', 0xc00c, AAAA, IN, $ttl, |
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280 16, 1); |
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281 |
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282 } elsif (($name eq 'short.example.net')) { |
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283 # zero length RDATA in DNS response |
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284 |
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285 push @rdata, rd_addr($ttl, ''); |
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286 |
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287 } elsif (($name eq 'alias.example.com')) { |
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288 # example.com. 3600 IN DNAME example.net. |
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289 |
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290 my @dname = ('example', 'net'); |
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291 my $rdlen = length(join '', @dname) + @dname + 1; |
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292 push @rdata, pack("n3N n(w/a*)* x", 0xc012, DNAME, IN, $ttl, |
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293 $rdlen, @dname); |
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294 |
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295 # alias.example.com. 3600 IN CNAME alias.example.net. |
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296 |
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297 push @rdata, pack("n3N nCa5n", 0xc00c, CNAME, IN, $ttl, |
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298 8, 5, 'alias', 0xc02f); |
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299 |
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300 } elsif ($name eq 'cname.example.net') { |
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301 if ($port == 8082) { |
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302 $rcode = SERVFAIL; |
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303 } |
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304 push @rdata, pack("n3N nCa5n", 0xc00c, CNAME, IN, $ttl, |
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305 8, 5, 'alias', 0xc012); |
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306 |
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307 } elsif ($name eq 'cname_a.example.net') { |
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308 push @rdata, pack("n3N nCa5n", 0xc00c, CNAME, IN, $ttl, |
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309 8, 5, 'alias', 0xc014); |
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310 |
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311 # points to "alias" set in previous rdata |
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312 |
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313 push @rdata, pack('n3N nC4', 0xc031, A, IN, $ttl, |
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314 4, split(/\./, '127.0.0.1')); |
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315 |
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316 } elsif ($name eq 'cname2.example.net') { |
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317 # points to non-existing A |
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318 |
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319 push @rdata, pack("n3N nCa2n", 0xc00c, CNAME, IN, $ttl, |
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320 5, 2, 'nx', 0xc02f); |
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321 |
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322 } elsif ($name eq 'long.example.net') { |
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323 push @rdata, pack("n3N nCA63x", 0xc00c, CNAME, IN, $ttl, |
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324 65, 63, 'a' x 63); |
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325 |
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326 } elsif (($name eq 'a' x 63)) { |
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327 push @rdata, rd_addr($ttl, '127.0.0.1'); |
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328 |
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329 } elsif ($name eq 'long2.example.net') { |
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330 push @rdata, pack("n3N n(CA63)4x", 0xc00c, CNAME, IN, $ttl, 257, |
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331 63, 'a' x 63, 63, 'a' x 63, 63, 'a' x 63, 63, 'a' x 63); |
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332 |
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333 } elsif (($name eq 'a' x 63 . '.' . 'a' x 63 . '.' . 'a' x 63 . '.' |
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334 . 'a' x 63)) |
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335 { |
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336 push @rdata, rd_addr($ttl, '127.0.0.1'); |
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337 |
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338 } elsif ($name eq 'ttl.example.net') { |
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339 if ($port == 8082) { |
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340 $rcode = SERVFAIL; |
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341 } |
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342 |
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343 push @rdata, rd_addr(1, '127.0.0.1'); |
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344 |
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345 } elsif ($name eq 'ttl0.example.net') { |
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346 if ($port == 8082) { |
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347 $rcode = SERVFAIL; |
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348 } |
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349 |
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350 push @rdata, rd_addr(0, '127.0.0.1'); |
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351 |
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352 } elsif ($name eq '2.example.net') { |
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353 if ($port == 8081) { |
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354 $rcode = SERVFAIL; |
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355 } |
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356 |
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357 push @rdata, rd_addr(0, '127.0.0.1'); |
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358 |
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359 } else { |
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360 $rcode = NXDOMAIN; |
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361 } |
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362 |
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363 $len = @name; |
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364 pack("n6 (w/a*)$len x n2", $id, $hdr | $rcode, 1, scalar @rdata, |
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365 0, 0, @name, $type, $class) . join('', @rdata); |
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366 } |
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367 |
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368 sub rd_addr { |
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369 my ($ttl, $addr) = @_; |
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370 |
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371 my $code = 'split(/\./, $addr)'; |
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372 |
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373 return pack 'n3N', 0xc00c, A, IN, $ttl if $addr eq ''; |
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374 |
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375 pack 'n3N nC4', 0xc00c, A, IN, $ttl, eval "scalar $code", eval($code); |
352
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376 } |
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377 |
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378 sub dns_daemon { |
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379 my ($port, $t) = @_; |
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380 |
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381 my ($data, $recv_data); |
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382 my $socket = IO::Socket::INET->new( |
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383 LocalAddr => '127.0.0.1', |
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384 LocalPort => $port, |
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385 Proto => 'udp', |
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386 ) |
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387 or die "Can't create listening socket: $!\n"; |
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388 |
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389 # signal we are ready |
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390 |
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391 open my $fh, '>', $t->testdir() . '/' . $port; |
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392 close $fh; |
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393 |
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394 while (1) { |
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395 $socket->recv($recv_data, 65536); |
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396 $data = reply_handler($recv_data, $port); |
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397 $socket->send($data); |
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398 } |
352
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399 } |
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400 |
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401 ############################################################################### |