Mercurial > hg > nginx-tests
view http_resolver_cleanup.t @ 1236:93f749c1d5c5
Tests: fixed parallel tests execution with UDP.
Previously, when checking ports availability, a UDP socket was always created
first, then a TCP socket was created. On success, one of UDP and TCP sockets
was closed (depending on the "udp" option) and the second one was used to busy
this port in other scripts. This lead to the following problem: in an attempt
to reopen a UDP socket used in a given testing script it could be stolen by
another script as part of checking ports availability.
To solve this problem, UDP and TCP ports were split into two non-overlapping
ranges: TCP ports are only used in the range 8000-8499, and UDP ports - in
the range 8500-8999. In addition, the order of creating sockets in UDP tests
has been reversed: now a TCP socket used as a lock precedes a UDP socket.
author | Andrey Zelenkov <zelenkov@nginx.com> |
---|---|
date | Thu, 26 Oct 2017 18:00:21 +0300 |
parents | 78cb8e66b6bc |
children | e4974af3fb12 |
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#!/usr/bin/perl # (C) Sergey Kandaurov # (C) Nginx, Inc. # Tests for http resolver, worker process termination. ############################################################################### use warnings; use strict; use Test::More; BEGIN { use FindBin; chdir($FindBin::Bin); } use lib 'lib'; use Test::Nginx; ############################################################################### select STDERR; $| = 1; select STDOUT; $| = 1; my $t = Test::Nginx->new()->has(qw/http proxy/); plan(skip_all => 'win32') if $^O eq 'MSWin32'; plan(skip_all => 'use-after-free on shutdown') unless $ENV{TEST_NGINX_UNSAFE} or $t->has_version('1.11.8'); $t->write_file_expand('nginx.conf', <<'EOF')->plan(1); %%TEST_GLOBALS%% daemon off; events { } http { %%TEST_GLOBALS_HTTP%% server { listen 127.0.0.1:8080; server_name localhost; location / { resolver 127.0.0.1:%%PORT_8081_UDP%%; proxy_pass http://example.net/$args; } location /pid { add_header X-Pid $pid always; } } } EOF $t->run_daemon(\&dns_daemon, $t); $t->run()->waitforfile($t->testdir . '/' . port(8081)); ############################################################################### # truncated UDP response, no response over TCP my $s = http_get('/', start => 1); pass('request'); sleep 1; # retrasmission timer wasn't removed during resolver cleanup, # while the event memory was freed, resulting in use-after-free # when later removing timer in TCP connection http_get('/pid') =~ qr/X-Pid: (\d+)/; kill 'TERM', $1; ############################################################################### sub dns_daemon { my ($t) = @_; my ($data); my $socket = IO::Socket::INET->new( LocalAddr => '127.0.0.1', LocalPort => port(8081), Proto => 'udp', ) or die "Can't create UDP socket: $!\n"; # signal we are ready open my $fh, '>', $t->testdir() . '/' . port(8081); close $fh; while (1) { $socket->recv($data, 65536); # truncation bit set $data |= pack("n2", 0, 0x8380); $socket->send($data); } } ###############################################################################