Mercurial > hg > nginx-tests
view stream_resolver.t @ 1983:c7315caf2110
Tests: optimized processing of large QUIC packets with padding.
Path MTU discovery packets might contain a lot of padding, and creating
a copy of the whole buffer for each PADDING frame, which is just one
byte with type 0, consumes lots of resources. This was seen to result
in flapping of at least h3_keepalive.t and h3_ssl_early_data.t tests.
Fix is to copy at most 8 bytes for parse_int() calls when parsing
frame types.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 03 Jun 2024 04:17:28 +0300 |
parents | f3ba4c74de31 |
children |
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#!/usr/bin/perl # (C) Sergey Kandaurov # (C) Nginx, Inc. # Tests for stream upstream name resolved, proxy_next_upstream_tries. ############################################################################### use warnings; use strict; use Test::More; BEGIN { use FindBin; chdir($FindBin::Bin); } use lib 'lib'; use Test::Nginx; use Test::Nginx::Stream qw/ stream /; ############################################################################### select STDERR; $| = 1; select STDOUT; $| = 1; my $t = Test::Nginx->new()->has(qw/stream stream_map stream_return/) ->write_file_expand('nginx.conf', <<'EOF'); %%TEST_GLOBALS%% daemon off; events { } stream { %%TEST_GLOBALS_STREAM%% map $server_port $upstream { %%PORT_8081%% a.example.com:%%PORT_8090%%; %%PORT_8082%% a.example.com; %%PORT_8083%% nx.example.com:%%PORT_8082%%; } map $server_port $many { default $server_port.many.example.com; } resolver 127.0.0.1:%%PORT_8980_UDP%%; server { listen 127.0.0.1:8081; listen 127.0.0.1:8082; listen 127.0.0.1:8083; proxy_pass $upstream; } server { listen 127.0.0.1:8084; proxy_pass $many:%%PORT_8090%%; proxy_next_upstream_tries 3; proxy_connect_timeout 1s; } server { listen 127.0.0.1:8085; proxy_pass $many:%%PORT_8090%%; proxy_next_upstream_tries 2; proxy_connect_timeout 1s; } server { listen 127.0.0.1:8086; proxy_pass $many:%%PORT_8090%%; proxy_next_upstream_tries 0; proxy_connect_timeout 1s; } server { listen 127.0.0.1:8090; return SEE-THIS; } } EOF $t->run_daemon(\&dns_daemon, port(8980), $t); $t->run()->plan(8); $t->waitforfile($t->testdir . '/' . port(8980)); ############################################################################### ok(stream('127.0.0.1:' . port(8081))->read(), 'resolver'); ok(!stream('127.0.0.1:' . port(8082))->read(), 'upstream no port'); ok(!stream('127.0.0.1:' . port(8083))->read(), 'name not found'); ok(stream('127.0.0.1:' . port(8084))->read(), 'resolved tries'); ok(!stream('127.0.0.1:' . port(8085))->read(), 'resolved tries limited'); ok(stream('127.0.0.1:' . port(8086))->read(), 'resolved tries zero'); $t->stop(); SKIP: { skip "relies on error log contents", 2 unless $ENV{TEST_NGINX_UNSAFE}; my $log = `grep -F '[error]' ${\($t->testdir())}/error.log`; like($log, qr/no port in upstream "a.example.com"/, 'log - no port'); like($log, qr/nx.example.com could not be resolved/, 'log - not found'); } ############################################################################### sub reply_handler { my ($recv_data, $port) = @_; my (@name, @rdata); use constant NOERROR => 0; use constant A => 1; use constant IN => 1; # default values my ($hdr, $rcode, $ttl) = (0x8180, NOERROR, 3600); # decode name my ($len, $offset) = (undef, 12); while (1) { $len = unpack("\@$offset C", $recv_data); last if $len == 0; $offset++; push @name, unpack("\@$offset A$len", $recv_data); $offset += $len; } $offset -= 1; my ($id, $type, $class) = unpack("n x$offset n2", $recv_data); my $name = join('.', @name); if ($name eq 'a.example.com' && $type == A) { push @rdata, rd_addr($ttl, '127.0.0.1'); } elsif ($name =~ qr/many.example.com/ && $type == A) { push @rdata, rd_addr($ttl, '127.0.0.2'); push @rdata, rd_addr($ttl, '127.0.0.2'); push @rdata, rd_addr($ttl, '127.0.0.1'); } $len = @name; pack("n6 (C/a*)$len x n2", $id, $hdr | $rcode, 1, scalar @rdata, 0, 0, @name, $type, $class) . join('', @rdata); } sub rd_addr { my ($ttl, $addr) = @_; my $code = 'split(/\./, $addr)'; return pack 'n3N', 0xc00c, A, IN, $ttl if $addr eq ''; pack 'n3N nC4', 0xc00c, A, IN, $ttl, eval "scalar $code", eval($code); } sub dns_daemon { my ($port, $t) = @_; my ($data, $recv_data); my $socket = IO::Socket::INET->new( LocalAddr => '127.0.0.1', LocalPort => $port, Proto => 'udp', ) or die "Can't create listening socket: $!\n"; local $SIG{PIPE} = 'IGNORE'; # signal we are ready open my $fh, '>', $t->testdir() . '/' . $port; close $fh; while (1) { $socket->recv($recv_data, 65536); $data = reply_handler($recv_data, $port); $socket->send($data); } } ###############################################################################