annotate http_resolver.t @ 544:e82bbe71f50c

Tests: removed TODOs for resolver fixes merged in 1.6.2.
author Sergey Kandaurov <pluknet@nginx.com>
date Tue, 07 Apr 2015 16:45:14 +0300
parents 5ec2caad00e8
children a04b8b9537cd
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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 qw/ :DEFAULT http_end /;
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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://$host:8080/backend;
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72 }
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73 location /bad {
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74 resolver 127.0.0.1:8089;
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75 resolver_timeout 1s;
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76 proxy_pass http://$host:8080/backend;
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77 }
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78
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79 location /backend {
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80 return 200;
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81 }
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82 location /50x {
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83 return 200 $upstream_addr;
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84 }
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85 }
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86 }
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87
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88 EOF
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89
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90 $t->run_daemon(\&dns_daemon, 8081, $t);
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91 $t->run_daemon(\&dns_daemon, 8082, $t);
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92 $t->run_daemon(\&dns_daemon, 8089, $t);
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93
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94 $t->run()->plan(32);
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95
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96 $t->waitforfile($t->testdir . '/8081');
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97 $t->waitforfile($t->testdir . '/8082');
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98 $t->waitforfile($t->testdir . '/8089');
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99
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100 ###############################################################################
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101
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102 # schedule resend test, which takes about 5 seconds to complete
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103
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104 my $s = http_host_header('id.example.net', '/resend', start => 1);
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105
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106 like(http_host_header('a.example.net', '/'), qr/200 OK/, 'A');
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107
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108 # ensure that resolver serves queries from cache in a case-insensitive manner
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109 # we check this by marking 2nd and subsequent queries on backend with SERVFAIL
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110
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111 http_x_name_header('case.example.net', '/case');
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112 like(http_x_name_header('CASE.example.net', '/case'), qr/200 OK/,
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113 'A case-insensitive');
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114
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115 like(http_host_header('awide.example.net', '/'), qr/200 OK/, 'A uncompressed');
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116 like(http_host_header('short.example.net', '/'), qr/502 Bad/,
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117 'A short dns response');
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118
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119 like(http_host_header('nx.example.net', '/'), qr/502 Bad/, 'NXDOMAIN');
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120 like(http_host_header('cname.example.net', '/'), qr/200 OK/, 'CNAME');
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121 like(http_host_header('cname.example.net', '/'), qr/200 OK/,
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122 'CNAME cached');
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123
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124 # CNAME + A combined answer
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125 # demonstrates the name in answer section different from what is asked
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126
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127 like(http_host_header('cname_a.example.net', '/'), qr/200 OK/, 'CNAME + A');
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128
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129 # CNAME refers to non-existing A
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130
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131 like(http_host_header('cname2.example.net', '/'), qr/502 Bad/, 'CNAME bad');
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132 like(http_host_header('long.example.net', '/'), qr/200 OK/, 'long label');
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133 like(http_host_header('long2.example.net', '/'), qr/200 OK/, 'long name');
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134
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135 # take into account DNAME
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136
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137 like(http_host_header('alias.example.com', '/'), qr/200 OK/, 'DNAME');
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138
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139 # many A records in round robin
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140 # nonexisting IPs enumerated with proxy_next_upstream
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141
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142 like(http_host_header('many.example.net', '/'),
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143 qr/^127.0.0.20(1:8080, 127.0.0.202:8080|2:8080, 127.0.0.201:8080)$/m,
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144 'A many');
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145
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146 like(http_host_header('many.example.net', '/'),
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147 qr/^127.0.0.20(1:8080, 127.0.0.202:8080|2:8080, 127.0.0.201:8080)$/m,
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148 'A many cached');
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149
359
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150 # tests for several resolvers specified in directive
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151 # query bad ns, make sure that error responses are not cached
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152
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153 like(http_host_header('2.example.net', '/two'), qr/502 Bad/, 'two ns bad');
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154
359
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155 # now get correct response
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156
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157 like(http_host_header('2.example.net', '/two'), qr/200 OK/, 'two ns good');
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158
359
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159 # response is cached, actual request would get error
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160
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161 like(http_host_header('2.example.net', '/two'), qr/200 OK/, 'two ns cached');
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162
359
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163 # ttl tested with 1st req good and 2nd req bad
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164 # send 1st request and cache its good response
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165
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166 like(http_host_header('ttl.example.net', '/'), qr/200 OK/, 'ttl');
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167
359
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168 # response is cached, actual request would get error
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169
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170 like(http_host_header('ttl.example.net', '/'), qr/200 OK/, 'ttl cached 1');
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171 like(http_host_header('ttl.example.net', '/'), qr/200 OK/, 'ttl cached 2');
352
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172
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173 sleep 2;
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174
359
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175 # expired ttl causes nginx to make actual query
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176
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177 like(http_host_header('ttl.example.net', '/'), qr/502 Bad/, 'ttl expired');
352
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178
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179 # zero ttl prohibits response caching
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180
359
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181 like(http_host_header('ttl0.example.net', '/'), qr/200 OK/, 'zero ttl');
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182
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183 TODO: {
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184 local $TODO = 'support for zero ttl';
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185
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186 like(http_host_header('ttl0.example.net', '/'), qr/502 Bad/,
352
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187 'zero ttl not cached');
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188
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189 }
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190
359
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191 # "valid" parameter tested with 1st req good and 2nd req bad
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192 # send 1st request and cache its good response
352
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193
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194 like(http_host_header('ttl.example.net', '/valid'), qr/200 OK/, 'valid');
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195
359
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196 # response is cached, actual request would get error
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197
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198 like(http_host_header('ttl.example.net', '/valid'), qr/200 OK/,
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199 'valid cached 1');
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200 like(http_host_header('ttl.example.net', '/valid'), qr/200 OK/,
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201 'valid cached 2');
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202
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203 sleep 2;
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204
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205 # expired ttl is overridden with "valid" parameter
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206 # response is taken from cache
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207
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208 like(http_host_header('ttl.example.net', '/valid'), qr/200 OK/,
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209 'valid overrides ttl');
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210
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211 sleep 2;
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212
359
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213 # expired "valid" value causes nginx to make actual query
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214
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215 like(http_host_header('ttl.example.net', '/valid'), qr/502 Bad/,
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216 'valid expired');
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217
362
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218 # Ensure that resolver respects expired CNAME in CNAME + A combined response.
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219 # When ttl in CNAME is expired, the answer should not be served from cache.
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220 # Catch this by returning SERVFAIL on the 2nd and subsequent queries.
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221
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222 http_host_header('cname_a_ttl2.example.net', '/');
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223
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224 sleep 2;
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225
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226 like(http_host_header('cname_a_ttl2.example.net', '/'), qr/502 Bad/,
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227 'CNAME + A with expired CNAME ttl');
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228
352
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229 like(http_host_header('example.net', '/invalid'), qr/502 Bad/, 'no resolver');
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230
436
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231 like(http_end($s), qr/200 OK/, 'resend after malformed response');
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232
449
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233 $s = http_get('/bad', start => 1);
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234 my $s2 = http_get('/bad', start => 1);
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235
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236 http_end($s);
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237 ok(http_end($s2), 'timeout handler on 2nd request');
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238
352
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239 ###############################################################################
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240
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241 sub http_host_header {
438
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242 my ($host, $uri, %extra) = @_;
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243 return http(<<EOF, %extra);
352
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244 GET $uri HTTP/1.0
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245 Host: $host
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246
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247 EOF
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248 }
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249
362
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250 sub http_x_name_header {
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251 my ($host, $uri) = @_;
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252 return http(<<EOF);
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253 GET $uri HTTP/1.0
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254 X-Name: $host
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255
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256 EOF
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257 }
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258
352
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259 ###############################################################################
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260
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261 sub reply_handler {
359
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262 my ($recv_data, $port, $state) = @_;
357
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263
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264 my (@name, @rdata);
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265
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266 use constant NOERROR => 0;
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267 use constant SERVFAIL => 2;
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268 use constant NXDOMAIN => 3;
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269
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270 use constant A => 1;
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271 use constant CNAME => 5;
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272 use constant DNAME => 39;
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273
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274 use constant IN => 1;
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275
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276 # default values
352
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277
357
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278 my ($hdr, $rcode, $ttl) = (0x8180, NOERROR, 3600);
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diff changeset
279
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diff changeset
280 # decode name
352
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281
357
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diff changeset
282 my ($len, $offset) = (undef, 12);
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diff changeset
283 while (1) {
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diff changeset
284 $len = unpack("\@$offset C", $recv_data);
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diff changeset
285 last if $len == 0;
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diff changeset
286 $offset++;
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diff changeset
287 push @name, unpack("\@$offset A$len", $recv_data);
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diff changeset
288 $offset += $len;
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289 }
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diff changeset
290
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diff changeset
291 $offset -= 1;
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diff changeset
292 my ($id, $type, $class) = unpack("n x$offset n2", $recv_data);
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diff changeset
293
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diff changeset
294 my $name = join('.', @name);
352
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295 if (($name eq 'a.example.net') || ($name eq 'alias.example.net')) {
359
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diff changeset
296 if ($type == A || $type == CNAME) {
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diff changeset
297 push @rdata, rd_addr($ttl, '127.0.0.1');
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298 }
352
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299
362
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diff changeset
300 } elsif ($name eq 'case.example.net' && $type == A) {
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diff changeset
301 if (++$state->{casecnt} > 1) {
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302 $rcode = SERVFAIL;
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303 }
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diff changeset
304
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diff changeset
305 push @rdata, rd_addr($ttl, '127.0.0.1');
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diff changeset
306
436
4984dac109db Tests: added test for resolver resend.
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diff changeset
307 } elsif ($name eq 'id.example.net' && $type == A) {
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diff changeset
308 if (++$state->{idcnt} == 1) {
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diff changeset
309 $id++;
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310 }
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diff changeset
311
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diff changeset
312 push @rdata, rd_addr($ttl, '127.0.0.1');
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diff changeset
313
362
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diff changeset
314 } elsif ($name eq 'awide.example.net' && $type == A) {
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diff changeset
315 push @rdata, pack '(w/a*)3x n2N nC4',
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diff changeset
316 ('awide', 'example', 'net'), A, IN, $ttl,
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diff changeset
317 4, (127, 0, 0, 1);
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diff changeset
318
359
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diff changeset
319 } elsif (($name eq 'many.example.net') && $type == A) {
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diff changeset
320 $state->{manycnt}++;
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diff changeset
321 if ($state->{manycnt} > 1) {
357
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diff changeset
322 $rcode = SERVFAIL;
352
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323 }
357
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diff changeset
324
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diff changeset
325 push @rdata, rd_addr($ttl, '127.0.0.201');
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diff changeset
326 push @rdata, rd_addr($ttl, '127.0.0.202');
352
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327
145c37f27c5a Tests: added resolver tests.
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diff changeset
328
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329 } elsif (($name eq 'short.example.net')) {
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330 # zero length RDATA in DNS response
357
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diff changeset
331
359
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diff changeset
332 if ($type == A) {
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diff changeset
333 push @rdata, rd_addr($ttl, '');
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diff changeset
334 }
352
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335
145c37f27c5a Tests: added resolver tests.
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diff changeset
336 } elsif (($name eq 'alias.example.com')) {
357
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diff changeset
337 # example.com. 3600 IN DNAME example.net.
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diff changeset
338
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diff changeset
339 my @dname = ('example', 'net');
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diff changeset
340 my $rdlen = length(join '', @dname) + @dname + 1;
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diff changeset
341 push @rdata, pack("n3N n(w/a*)* x", 0xc012, DNAME, IN, $ttl,
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diff changeset
342 $rdlen, @dname);
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diff changeset
343
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diff changeset
344 # alias.example.com. 3600 IN CNAME alias.example.net.
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diff changeset
345
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diff changeset
346 push @rdata, pack("n3N nCa5n", 0xc00c, CNAME, IN, $ttl,
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diff changeset
347 8, 5, 'alias', 0xc02f);
352
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diff changeset
348
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diff changeset
349 } elsif ($name eq 'cname.example.net') {
359
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diff changeset
350 $state->{cnamecnt}++;
cdab739eb6ea Tests: resolver tests enabled to work with AAAA capable resolver.
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diff changeset
351 if ($state->{cnamecnt} > 2) {
cdab739eb6ea Tests: resolver tests enabled to work with AAAA capable resolver.
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diff changeset
352 $rcode = SERVFAIL;
352
145c37f27c5a Tests: added resolver tests.
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diff changeset
353 }
357
e0c00e695cb5 Tests: removed Net::DNS dependency.
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diff changeset
354 push @rdata, pack("n3N nCa5n", 0xc00c, CNAME, IN, $ttl,
e0c00e695cb5 Tests: removed Net::DNS dependency.
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diff changeset
355 8, 5, 'alias', 0xc012);
352
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parents:
diff changeset
356
356
7a472e46772c Tests: added http resolver test for CNAME + A combined answer.
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diff changeset
357 } elsif ($name eq 'cname_a.example.net') {
357
e0c00e695cb5 Tests: removed Net::DNS dependency.
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parents: 356
diff changeset
358 push @rdata, pack("n3N nCa5n", 0xc00c, CNAME, IN, $ttl,
e0c00e695cb5 Tests: removed Net::DNS dependency.
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parents: 356
diff changeset
359 8, 5, 'alias', 0xc014);
356
7a472e46772c Tests: added http resolver test for CNAME + A combined answer.
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parents: 352
diff changeset
360
357
e0c00e695cb5 Tests: removed Net::DNS dependency.
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parents: 356
diff changeset
361 # points to "alias" set in previous rdata
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diff changeset
362
359
cdab739eb6ea Tests: resolver tests enabled to work with AAAA capable resolver.
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parents: 357
diff changeset
363 if ($type == A) {
cdab739eb6ea Tests: resolver tests enabled to work with AAAA capable resolver.
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diff changeset
364 push @rdata, pack('n3N nC4', 0xc031, A, IN, $ttl,
cdab739eb6ea Tests: resolver tests enabled to work with AAAA capable resolver.
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parents: 357
diff changeset
365 4, split(/\./, '127.0.0.1'));
cdab739eb6ea Tests: resolver tests enabled to work with AAAA capable resolver.
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parents: 357
diff changeset
366 }
356
7a472e46772c Tests: added http resolver test for CNAME + A combined answer.
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parents: 352
diff changeset
367
362
8ca9c75c97d2 Tests: more resolver tests.
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parents: 359
diff changeset
368 } elsif ($name eq 'cname_a_ttl2.example.net' && $type == A) {
8ca9c75c97d2 Tests: more resolver tests.
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parents: 359
diff changeset
369 push @rdata, pack("n3N nCa18n", 0xc00c, CNAME, IN, 1,
8ca9c75c97d2 Tests: more resolver tests.
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parents: 359
diff changeset
370 21, 18, 'cname_a_ttl2_alias', 0xc019);
8ca9c75c97d2 Tests: more resolver tests.
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parents: 359
diff changeset
371 if (++$state->{cttl2cnt} >= 2) {
8ca9c75c97d2 Tests: more resolver tests.
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parents: 359
diff changeset
372 $rcode = SERVFAIL;
8ca9c75c97d2 Tests: more resolver tests.
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parents: 359
diff changeset
373 }
8ca9c75c97d2 Tests: more resolver tests.
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parents: 359
diff changeset
374 push @rdata, pack('n3N nC4', 0xc036, A, IN, $ttl,
8ca9c75c97d2 Tests: more resolver tests.
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parents: 359
diff changeset
375 4, split(/\./, '127.0.0.1'));
8ca9c75c97d2 Tests: more resolver tests.
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parents: 359
diff changeset
376
8ca9c75c97d2 Tests: more resolver tests.
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parents: 359
diff changeset
377 } elsif ($name eq 'cname_a_ttl_alias.example.net' && $type == A) {
8ca9c75c97d2 Tests: more resolver tests.
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parents: 359
diff changeset
378 push @rdata, rd_addr($ttl, '127.0.0.1');
8ca9c75c97d2 Tests: more resolver tests.
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parents: 359
diff changeset
379
352
145c37f27c5a Tests: added resolver tests.
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parents:
diff changeset
380 } elsif ($name eq 'cname2.example.net') {
145c37f27c5a Tests: added resolver tests.
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parents:
diff changeset
381 # points to non-existing A
357
e0c00e695cb5 Tests: removed Net::DNS dependency.
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parents: 356
diff changeset
382
e0c00e695cb5 Tests: removed Net::DNS dependency.
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parents: 356
diff changeset
383 push @rdata, pack("n3N nCa2n", 0xc00c, CNAME, IN, $ttl,
e0c00e695cb5 Tests: removed Net::DNS dependency.
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parents: 356
diff changeset
384 5, 2, 'nx', 0xc02f);
352
145c37f27c5a Tests: added resolver tests.
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parents:
diff changeset
385
145c37f27c5a Tests: added resolver tests.
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parents:
diff changeset
386 } elsif ($name eq 'long.example.net') {
357
e0c00e695cb5 Tests: removed Net::DNS dependency.
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parents: 356
diff changeset
387 push @rdata, pack("n3N nCA63x", 0xc00c, CNAME, IN, $ttl,
e0c00e695cb5 Tests: removed Net::DNS dependency.
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parents: 356
diff changeset
388 65, 63, 'a' x 63);
352
145c37f27c5a Tests: added resolver tests.
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parents:
diff changeset
389
359
cdab739eb6ea Tests: resolver tests enabled to work with AAAA capable resolver.
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parents: 357
diff changeset
390 } elsif (($name eq 'a' x 63) && $type == A) {
357
e0c00e695cb5 Tests: removed Net::DNS dependency.
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parents: 356
diff changeset
391 push @rdata, rd_addr($ttl, '127.0.0.1');
352
145c37f27c5a Tests: added resolver tests.
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parents:
diff changeset
392
145c37f27c5a Tests: added resolver tests.
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parents:
diff changeset
393 } elsif ($name eq 'long2.example.net') {
357
e0c00e695cb5 Tests: removed Net::DNS dependency.
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parents: 356
diff changeset
394 push @rdata, pack("n3N n(CA63)4x", 0xc00c, CNAME, IN, $ttl, 257,
e0c00e695cb5 Tests: removed Net::DNS dependency.
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parents: 356
diff changeset
395 63, 'a' x 63, 63, 'a' x 63, 63, 'a' x 63, 63, 'a' x 63);
352
145c37f27c5a Tests: added resolver tests.
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parents:
diff changeset
396
145c37f27c5a Tests: added resolver tests.
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parents:
diff changeset
397 } elsif (($name eq 'a' x 63 . '.' . 'a' x 63 . '.' . 'a' x 63 . '.'
359
cdab739eb6ea Tests: resolver tests enabled to work with AAAA capable resolver.
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parents: 357
diff changeset
398 . 'a' x 63) && $type == A)
352
145c37f27c5a Tests: added resolver tests.
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parents:
diff changeset
399 {
357
e0c00e695cb5 Tests: removed Net::DNS dependency.
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parents: 356
diff changeset
400 push @rdata, rd_addr($ttl, '127.0.0.1');
352
145c37f27c5a Tests: added resolver tests.
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parents:
diff changeset
401
359
cdab739eb6ea Tests: resolver tests enabled to work with AAAA capable resolver.
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parents: 357
diff changeset
402 } elsif ($name eq 'ttl.example.net' && $type == A) {
cdab739eb6ea Tests: resolver tests enabled to work with AAAA capable resolver.
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parents: 357
diff changeset
403 $state->{ttlcnt}++;
cdab739eb6ea Tests: resolver tests enabled to work with AAAA capable resolver.
Sergey Kandaurov <pluknet@nginx.com>
parents: 357
diff changeset
404 if ($state->{ttlcnt} == 2 || $state->{ttlcnt} == 4) {
357
e0c00e695cb5 Tests: removed Net::DNS dependency.
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diff changeset
405 $rcode = SERVFAIL;
352
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406 }
357
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407
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408 push @rdata, rd_addr(1, '127.0.0.1');
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409
359
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410 } elsif ($name eq 'ttl0.example.net' && $type == A) {
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411 $state->{ttl0cnt}++;
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412 if ($state->{ttl0cnt} == 2) {
357
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413 $rcode = SERVFAIL;
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414 }
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415
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416 push @rdata, rd_addr(0, '127.0.0.1');
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417
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418 } elsif ($name eq '2.example.net') {
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419 if ($port == 8081) {
359
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420 $state->{twocnt}++;
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421 }
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422 if ($state->{twocnt} & 1) {
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423 $rcode = SERVFAIL;
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424 }
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425
359
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426 if ($type == A) {
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427 push @rdata, rd_addr($ttl, '127.0.0.1');
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428 }
352
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429 }
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430
357
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431 $len = @name;
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432 pack("n6 (w/a*)$len x n2", $id, $hdr | $rcode, 1, scalar @rdata,
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433 0, 0, @name, $type, $class) . join('', @rdata);
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434 }
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435
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436 sub rd_addr {
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437 my ($ttl, $addr) = @_;
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438
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439 my $code = 'split(/\./, $addr)';
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440
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441 return pack 'n3N', 0xc00c, A, IN, $ttl if $addr eq '';
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442
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443 pack 'n3N nC4', 0xc00c, A, IN, $ttl, eval "scalar $code", eval($code);
352
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444 }
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445
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446 sub dns_daemon {
357
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447 my ($port, $t) = @_;
352
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448
357
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449 my ($data, $recv_data);
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450 my $socket = IO::Socket::INET->new(
352
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451 LocalAddr => '127.0.0.1',
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452 LocalPort => $port,
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453 Proto => 'udp',
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454 )
357
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455 or die "Can't create listening socket: $!\n";
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456
359
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457 # track number of relevant queries
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458
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459 my %state = (
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460 cnamecnt => 0,
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461 twocnt => 0,
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462 ttlcnt => 0,
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463 ttl0cnt => 0,
362
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diff changeset
464 cttlcnt => 0,
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465 cttl2cnt => 0,
359
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466 manycnt => 0,
362
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diff changeset
467 casecnt => 0,
436
4984dac109db Tests: added test for resolver resend.
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diff changeset
468 idcnt => 0,
359
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diff changeset
469 );
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diff changeset
470
357
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471 # signal we are ready
352
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472
357
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diff changeset
473 open my $fh, '>', $t->testdir() . '/' . $port;
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474 close $fh;
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diff changeset
475
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diff changeset
476 while (1) {
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diff changeset
477 $socket->recv($recv_data, 65536);
464
5ec2caad00e8 Tests: fixed resolver timeout test.
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diff changeset
478 next if $port == 8089;
359
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diff changeset
479 $data = reply_handler($recv_data, $port, \%state);
357
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diff changeset
480 $socket->send($data);
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diff changeset
481 }
352
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diff changeset
482 }
145c37f27c5a Tests: added resolver tests.
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parents:
diff changeset
483
145c37f27c5a Tests: added resolver tests.
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diff changeset
484 ###############################################################################