view stream_limit_conn_dry_run.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 5ac6efbe5552
children
line wrap: on
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#!/usr/bin/perl

# (C) Sergey Kandaurov
# (C) Nginx, Inc.

# Tests for limit_conn_dry_run directive, limit_conn_status variable.

###############################################################################

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_limit_conn http/);

$t->write_file_expand('nginx.conf', <<'EOF');

%%TEST_GLOBALS%%

daemon off;

events {
}

stream {
    %%TEST_GLOBALS_STREAM%%

    limit_conn_zone  $binary_remote_addr  zone=zone:1m;

    log_format test $server_port:$limit_conn_status;
    access_log %%TESTDIR%%/test.log test;

    server {
        listen      127.0.0.1:8080;
        proxy_pass  127.0.0.1:8084;
        limit_conn  zone 1;

        proxy_timeout 5s;
    }

    server {
        listen      127.0.0.1:8081;
        proxy_pass  127.0.0.1:8084;
        limit_conn  zone 1;
    }

    server {
        listen      127.0.0.1:8082;
        proxy_pass  127.0.0.1:8084;
        limit_conn  zone 1;

        limit_conn_dry_run on;
    }

    server {
        listen      127.0.0.1:8083;
        proxy_pass  127.0.0.1:8084;
    }
}

http {
    %%TEST_GLOBALS_HTTP%%

    server {
        listen       127.0.0.1:8084;
        server_name  localhost;

        location / { }
    }
}

EOF

$t->write_file('index.html', 'OK');
$t->run()->plan(9);

###############################################################################

my ($p, $p1, $p2, $p3) = (port(8080), port(8081), port(8082), port(8083));

is(stream("127.0.0.1:$p")->io("GET /\n"), 'OK', 'passed');

my $s = stream('127.0.0.1:' . port(8080));
$s->write("GET");

is(stream("127.0.0.1:$p1")->io("GET /\n"), '', 'rejected');
is(stream("127.0.0.1:$p2")->io("GET /\n"), 'OK', 'rejected dry run');
is(stream("127.0.0.1:$p3")->io("GET /\n"), 'OK', 'no limit');

undef $s;

$t->stop();

like($t->read_file('error.log'), qr/limiting connections, dry/, 'log dry run');
like($t->read_file('test.log'), qr|$p:PASSED|, 'log passed');
like($t->read_file('test.log'), qr|$p1:REJECTED$|m, 'log rejected');
like($t->read_file('test.log'), qr|$p2:REJECTED_DRY_RUN|, 'log rejected dry');
like($t->read_file('test.log'), qr|$p3:-|, 'log not found');

###############################################################################