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annotate http_resolver_cleanup.t @ 1427:eb1d883305ea

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Tests: avoid edge cases in upstream random two test. Unavailable servers contribute to the number of attempts, if selected, before the balancer would fall back to the default round-robin method. This means that it's quite possible to get server with more connections. To facilitate with selecting two alive servers, down server was removed from the upstream configuration at the cost of slightly worse coverage.
author Sergey Kandaurov <pluknet@nginx.com>
date Thu, 10 Jan 2019 17:42:34 +0300
parents 766bcbb632ee
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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, worker process termination.
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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/);
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26
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27 plan(skip_all => 'win32') if $^O eq 'MSWin32';
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28
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29 $t->write_file_expand('nginx.conf', <<'EOF')->plan(1);
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30
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31 %%TEST_GLOBALS%%
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32
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33 daemon off;
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34
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35 events {
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36 }
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37
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38 http {
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39 %%TEST_GLOBALS_HTTP%%
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40
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41 server {
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42 listen 127.0.0.1:8080;
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43 server_name localhost;
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44
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45 location / {
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46 resolver 127.0.0.1:%%PORT_8981_UDP%%;
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47 proxy_pass http://example.net/$args;
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48 }
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49
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50 location /pid {
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51 add_header X-Pid $pid always;
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52 }
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53 }
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54 }
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55
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56 EOF
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57
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58 $t->run_daemon(\&dns_daemon, $t);
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59 $t->run()->waitforfile($t->testdir . '/' . port(8981));
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60
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61 ###############################################################################
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62
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63 # truncated UDP response, no response over TCP
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64
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65 my $s = http_get('/', start => 1);
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66
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67 pass('request');
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68
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69 sleep 1;
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70
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71 # retrasmission timer wasn't removed during resolver cleanup,
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72 # while the event memory was freed, resulting in use-after-free
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73 # when later removing timer in TCP connection
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74
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75 http_get('/pid') =~ qr/X-Pid: (\d+)/;
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76 kill 'TERM', $1;
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77
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78 ###############################################################################
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79
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80 sub dns_daemon {
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81 my ($t) = @_;
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82 my ($data);
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83
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84 my $socket = IO::Socket::INET->new(
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85 LocalAddr => '127.0.0.1',
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86 LocalPort => port(8981),
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87 Proto => 'udp',
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88 )
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89 or die "Can't create UDP socket: $!\n";
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90
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91 # signal we are ready
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92
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93 open my $fh, '>', $t->testdir() . '/' . port(8981);
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94 close $fh;
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95
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96 while (1) {
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97 $socket->recv($data, 65536);
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98 # truncation bit set
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99 $data |= pack("n2", 0, 0x8380);
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100 $socket->send($data);
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101 }
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102 }
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103
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104 ###############################################################################