Mercurial > hg > nginx-tests
view stream_resolver.t @ 1825:3629eda94c1b
Tests: handling of EWOULDBLOCK from sysread() with IO::Socket::SSL.
With IO::Socket::SSL, when select() reports that the socket is readable,
reading from it might still fail with EWOULDBLOCK, since no application
data is available in the socket. In particular, this might happen with
TLSv1.3 when a session ticket is received after the handshake. Fix is
to explicitly check for EWOULDBLOCK errors.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Tue, 21 Mar 2023 02:57:39 +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); } } ###############################################################################