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[PATCH] Tests: http resolver with ipv4/ipv6 parameters

Eugene Grebenschikov via nginx-devel
October 06, 2022 02:42AM
# HG changeset patch
# User Eugene Grebenschikov <e.grebenshchikov@f5.com>
# Date 1665038181 25200
# Wed Oct 05 23:36:21 2022 -0700
# Node ID 595dee133b0a3681e95567368191c559ad89b3a1
# Parent fac6ad94e062ee30356338c943843c4b34d5f532
Tests: http resolver with ipv4/ipv6 parameters.

diff -r fac6ad94e062 -r 595dee133b0a http_resolver_ipv4.t
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/http_resolver_ipv4.t Wed Oct 05 23:36:21 2022 -0700
@@ -0,0 +1,208 @@
+#!/usr/bin/perl
+
+# (C) Sergey Kandaurov
+# (C) Eugene Grebenschikov
+# (C) Nginx, Inc.
+
+# Tests for http resolver with ipv4/ipv6 parameters.
+
+###############################################################################
+
+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 $t = Test::Nginx->new()->has(qw/http proxy rewrite/);
+
+$t->write_file_expand('nginx.conf', <<'EOF');
+
+%%TEST_GLOBALS%%
+
+daemon off;
+
+events {
+}
+
+http {
+ %%TEST_GLOBALS_HTTP%%
+
+ server {
+ listen 127.0.0.1:8080;
+ server_name localhost;
+
+ location / {
+ proxy_pass http://$arg_h:%%PORT_8081%%/;
+ resolver 127.0.0.1:%%PORT_8980_UDP%% ipv4=on ipv6=on;
+ }
+
+ location /ipv4 {
+ proxy_pass http://$arg_h:%%PORT_8081%%/;
+ resolver 127.0.0.1:%%PORT_8980_UDP%% ipv4=on ipv6=off;
+ }
+
+ location /ipv6 {
+ proxy_pass http://$arg_h:%%PORT_8081%%/;
+ resolver 127.0.0.1:%%PORT_8980_UDP%% ipv4=off ipv6=on;
+ }
+ }
+
+ server {
+ listen 127.0.0.1:8081;
+ server_name localhost;
+
+ location / {
+ return 200 "ipv4";
+ }
+ }
+
+ server {
+ listen [::1]:%%PORT_8081%%;
+ server_name localhost;
+
+ location / {
+ return 200 "ipv6";
+ }
+ }
+}
+
+EOF
+
+$t->try_run('no resolver ipv4')->plan(3);
+
+$t->run_daemon(\&dns_daemon, port(8980), $t);
+$t->waitforfile($t->testdir . '/' . port(8980));
+
+###############################################################################
+
+like(many('/', 10), qr/ipv4: \d+, ipv6: \d+/, 'ipv4 ipv6');
+is(many('/ipv4', 10), 'ipv4: 10', 'ipv4 only');
+is(many('/ipv6', 10), 'ipv6: 10', 'ipv6 only');
+
+###############################################################################
+
+sub many {
+ my ($uri, $count) = @_;
+ my %hits;
+
+ for (1 .. $count) {
+ if (http_get("$uri?h=example.com") =~ /(ipv(4|6))/) {;
+ $hits{$1} = 0 unless defined $hits{$1};
+ $hits{$1}++;
+ }
+ }
+
+ return join ', ', map { $_ . ": " . $hits{$_} } sort keys %hits;
+}
+
+###############################################################################
+
+sub reply_handler {
+ my ($recv_data, $port) = @_;
+
+ my (@name, @rdata);
+
+ use constant NOERROR => 0;
+
+ use constant A => 1;
+ use constant AAAA => 28;
+
+ use constant IN => 1;
+
+ # default values
+
+ my ($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 'example.com') {
+ if ($type == A) {
+ push @rdata, rd_addr($ttl, '127.0.0.1');
+ }
+ if ($type == AAAA) {
+ push @rdata, rd_addr6($ttl, "::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)';
+
+ pack 'n3N nC4', 0xc00c, A, IN, $ttl, eval "scalar $code", eval($code);
+}
+
+sub expand_ip6 {
+ my ($addr) = @_;
+
+ substr ($addr, index($addr, "::"), 2) =
+ join "0", map { ":" } (0 .. 8 - (split /:/, $addr) + 1);
+ map { hex "0" x (4 - length $_) . "$_" } split /:/, $addr;
+}
+
+sub rd_addr6 {
+ my ($ttl, $addr) = @_;
+
+ pack 'n3N nn8', 0xc00c, AAAA, IN, $ttl, 16, expand_ip6($addr);
+}
+
+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";
+
+ # track number of relevant queries
+
+ my %state = (
+ cnamecnt => 0,
+ twocnt => 0,
+ manycnt => 0,
+ );
+
+ # 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, \%state);
+ $socket->send($data);
+ }
+}
+
+###############################################################################

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Subject Author Views Posted

[PATCH] Tests: http resolver with ipv4/ipv6 parameters

Eugene Grebenschikov via nginx-devel 365 October 06, 2022 02:42AM

[PATCH] Tests: http resolver with ipv4/ipv6 parameters

Eugene Grebenschikov via nginx-devel 130 October 06, 2022 03:04PM

Re: [PATCH] Tests: http resolver with ipv4/ipv6 parameters

Sergey Kandaurov 110 October 12, 2022 10:34AM



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