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dns/test/ResponseInterpreterTest.php
Daniel Lowrey d562ce24f4 Simplify directory structure
2014-09-24 13:35:10 -04:00

301 lines
13 KiB
PHP
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<?php
namespace Amp\Dns\Test;
use Amp\Dns\AddressModes;
use Amp\Dns\ResponseInterpreter;
use LibDNS\Decoder\DecoderFactory;
class ResponseInterpreterTest extends \PHPUnit_Framework_TestCase {
//Example packets below are taken from http://wiki.wireshark.org/SampleCaptures:
//"Standard query response","DNS","70","domain","32795","6"
static private $standardQueryResponse = [
0x49, 0xa1, 0x81, 0x80, 0x00, 0x01, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x06, 0x67, 0x6f, 0x6f,
0x67, 0x6c, 0x65, 0x03, 0x63, 0x6f, 0x6d, 0x00,
0x00, 0x1d, 0x00, 0x01
];
//"Standard query response PTR 66-192-9-104.gen.twtelecom.net","DNS","129","domain","32795","8"
static private $standardQueryResponsePTR = [
0x9b, 0xbb, 0x81, 0x80, 0x00, 0x01, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x03, 0x31, 0x30, 0x34,
0x01, 0x39, 0x03, 0x31, 0x39, 0x32, 0x02, 0x36,
0x36, 0x07, 0x69, 0x6e, 0x2d, 0x61, 0x64, 0x64,
0x72, 0x04, 0x61, 0x72, 0x70, 0x61, 0x00, 0x00,
0x0c, 0x00, 0x01, 0xc0, 0x0c, 0x00, 0x0c, 0x00,
0x01, 0x00, 0x01, 0x51, 0x25, 0x00, 0x20, 0x0c,
0x36, 0x36, 0x2d, 0x31, 0x39, 0x32, 0x2d, 0x39,
0x2d, 0x31, 0x30, 0x34, 0x03, 0x67, 0x65, 0x6e,
0x09, 0x74, 0x77, 0x74, 0x65, 0x6c, 0x65, 0x63,
0x6f, 0x6d, 0x03, 0x6e, 0x65, 0x74, 0x00
];
//"Standard query response A 204.152.190.12","DNS","90","domain","32795","10"
static private $standardQueryResponseA = [
0x75, 0xc0, 0x81, 0x80, 0x00, 0x01, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x03, 0x77, 0x77, 0x77,
0x06, 0x6e, 0x65, 0x74, 0x62, 0x73, 0x64, 0x03,
0x6f, 0x72, 0x67, 0x00, 0x00, 0x01, 0x00, 0x01,
0xc0, 0x0c, 0x00, 0x01, 0x00, 0x01, 0x00, 0x01,
0x40, 0xef, 0x00, 0x04, 0xcc, 0x98, 0xbe, 0x0c
];
//"Standard query response AAAA 2001:4f8:4:7:2e0:81ff:fe52:9a6b","DNS","102","domain","32795","14"
static private $standardQueryResponseIPV6 = [
0x7f, 0x39, 0x81, 0x80, 0x00, 0x01, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x03, 0x77, 0x77, 0x77,
0x06, 0x6e, 0x65, 0x74, 0x62, 0x73, 0x64, 0x03,
0x6f, 0x72, 0x67, 0x00, 0x00, 0x1c, 0x00, 0x01,
0xc0, 0x0c, 0x00, 0x1c, 0x00, 0x01, 0x00, 0x01,
0x51, 0x44, 0x00, 0x10, 0x20, 0x01, 0x04, 0xf8,
0x00, 0x04, 0x00, 0x07, 0x02, 0xe0, 0x81, 0xff,
0xfe, 0x52, 0x9a, 0x6b
];
//"Standard query response CNAME www.l.google.com","DNS","94","domain","32795","16"
static private $standardQueryResponseCNAME = [
0x8d, 0xb3, 0x81, 0x80, 0x00, 0x01, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x03, 0x77, 0x77, 0x77,
0x06, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x03,
0x63, 0x6f, 0x6d, 0x00, 0x00, 0x1c, 0x00, 0x01,
0xc0, 0x0c, 0x00, 0x05, 0x00, 0x01, 0x00, 0x00,
0x02, 0x79, 0x00, 0x08, 0x03, 0x77, 0x77, 0x77,
0x01, 0x6c, 0xc0, 0x10
];
//Standard query response, No such name DNS 79 domain 32795 22
static private $standardQueryResponseNoSuchName = [
0x26, 0x6d, 0x85, 0x83, 0x00, 0x01, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x03, 0x77, 0x77, 0x77,
0x07, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65,
0x07, 0x6e, 0x6f, 0x74, 0x67, 0x69, 0x6e, 0x68,
0x00, 0x00, 0x1c, 0x00, 0x01
];
//"Standard query response AAAA 2001:4f8:0:2::d A 204.152.184.88","DNS","115","domain","32795","24
static private $standardQueryResponseMixed = [
0xfe, 0xe3, 0x81, 0x80, 0x00, 0x01, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x03, 0x77, 0x77, 0x77,
0x03, 0x69, 0x73, 0x63, 0x03, 0x6f, 0x72, 0x67,
0x00, 0x00, 0xff, 0x00, 0x01, 0xc0, 0x0c, 0x00,
0x1c, 0x00, 0x01, 0x00, 0x00, 0x02, 0x58, 0x00,
0x10, 0x20, 0x01, 0x04, 0xf8, 0x00, 0x00, 0x00,
0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x0d, 0xc0, 0x0c, 0x00, 0x01, 0x00, 0x01, 0x00,
0x00, 0x02, 0x58, 0x00, 0x04, 0xcc, 0x98, 0xb8,
0x58
];
//Standard query response AAAA 2001:4f8:0:2::d A 204.152.184.88 DNS 115 domain 32795 24
static private $multipleResponse = [
0xfe, 0xe3, 0x81, 0x80, 0x00, 0x01, 0x00, 0x02,
0x00, 0x00, 0x00, 0x00, 0x03, 0x77, 0x77, 0x77,
0x03, 0x69, 0x73, 0x63, 0x03, 0x6f, 0x72, 0x67,
0x00, 0x00, 0xff, 0x00, 0x01, 0xc0, 0x0c, 0x00,
0x1c, 0x00, 0x01, 0x00, 0x00, 0x02, 0x58, 0x00,
0x10, 0x20, 0x01, 0x04, 0xf8, 0x00, 0x00, 0x00,
0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x0d, 0xc0, 0x0c, 0x00, 0x01, 0x00, 0x01, 0x00,
0x00, 0x02, 0x58, 0x00, 0x04, 0xcc, 0x98, 0xb8,
0x58
];
static private $bbcNews = [
//This should be equivalent to
// ;; ANSWER SECTION:
// news.bbc.co.uk. 655 IN CNAME newswww.bbc.net.uk.
// newswww.bbc.net.uk. 174 IN A 212.58.246.82
// newswww.bbc.net.uk. 174 IN A 212.58.246.83
0xe1, 0x16, 0x81, 0x80, 0x00, 0x01, 0x00, 0x03,
0x00, 0x00, 0x00, 0x00, 0x04, 0x6e, 0x65, 0x77,
0x73, 0x03, 0x62, 0x62, 0x63, 0x02, 0x63, 0x6f,
0x02, 0x75, 0x6b, 0x00, 0x00, 0x01, 0x00, 0x01,
0xc0, 0x0c, 0x00, 0x05, 0x00, 0x01, 0x00, 0x00,
0x02, 0x8f, 0x00, 0x12, 0x07, 0x6e, 0x65, 0x77,
0x73, 0x77, 0x77, 0x77, 0x03, 0x62, 0x62, 0x63,
0x03, 0x6e, 0x65, 0x74, 0xc0, 0x18, 0xc0, 0x2c,
0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0xae,
0x00, 0x04, 0xd4, 0x3a, 0xf6, 0x52, 0xc0, 0x2c,
0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0xae,
0x00, 0x04, 0xd4, 0x3a, 0xf6, 0x53
];
public function getPacketString(array $bytes) {
$packet = '';
foreach ($bytes as $byte) {
$packet .= chr($byte);
}
return $packet;
}
public function testCatchesExceptionAndReturnsNull() {
$decoder = \Mockery::mock('LibDNS\Decoder\Decoder');
$decoder->shouldReceive('decode')->withAnyArgs()->andThrow("Exception", "Testing bad packet");
$responseInterpreter = new ResponseInterpreter($decoder);
$result = $responseInterpreter->decode("SomePacket");
$this->assertNull($result);
}
public function testInvalidMessage() {
$message = \Mockery::mock('LibDNS\Messages\Message');
$message->shouldReceive('getType')->once()->andReturn(\LibDNS\Messages\MessageTypes::QUERY);
$decoder = \Mockery::mock('LibDNS\Decoder\Decoder');
$decoder->shouldReceive('decode')->once()->andReturn($message);
$responseInterpreter = new ResponseInterpreter($decoder);
$result = $responseInterpreter->decode("SomePacket");
$this->assertNull($result);
}
public function testInvalidResponseCode() {
$message = \Mockery::mock('LibDNS\Messages\Message');
$message->shouldReceive('getType')->once()->andReturn(\LibDNS\Messages\MessageTypes::RESPONSE);
$message->shouldReceive('getResponseCode')->once()->andReturn(42);
$decoder = \Mockery::mock('LibDNS\Decoder\Decoder');
$decoder->shouldReceive('decode')->once()->andReturn($message);
$responseInterpreter = new ResponseInterpreter($decoder);
$result = $responseInterpreter->decode("SomePacket");
$this->assertNull($result);
}
/**
* @group CNAME
*/
public function testNewsBBC() {
$testPacket = $this->getPacketString(self::$bbcNews);
$decoder = (new DecoderFactory)->create();
$responseInterpreter = new ResponseInterpreter($decoder);
$decoded = $responseInterpreter->decode($testPacket);
list($id, $response) = $decoded;
//Check the IPV4 result
$interpreted = $responseInterpreter->interpret($response, AddressModes::INET4_ADDR);
list($type, $addr, $ttl) = $interpreted;
$this->assertEquals(AddressModes::INET4_ADDR, $type);
//@TODO - this should be multiple - 212.58.246.82 and 212.58.246.83
$this->assertSame("212.58.246.82", $addr);
$this->assertSame(174, $ttl);
$interpreted = $responseInterpreter->interpret($response, AddressModes::INET6_ADDR);
list($type, $addr, $ttl) = $interpreted;
$this->assertEquals("newswww.bbc.net.uk", $addr);
$this->assertEquals(AddressModes::CNAME, $type);
$this->assertNull($ttl);
}
public function createResponseInterpreter() {
$decoder = (new DecoderFactory)->create();
$responseInterpreter = new ResponseInterpreter($decoder);
return $responseInterpreter;
}
public function testNoResults() {
$responseInterpreter = $this->createResponseInterpreter();
$packet = $this->getPacketString(self::$standardQueryResponse);
$decoded = $responseInterpreter->decode($packet);
list($id, $message) = $decoded;
$interpreted = $responseInterpreter->interpret($message, AddressModes::INET4_ADDR);
$this->assertNull($interpreted);
$interpreted = $responseInterpreter->interpret($message, AddressModes::INET6_ADDR);
$this->assertNull($interpreted);
}
public function testNoSuchName() {
$responseInterpreter = $this->createResponseInterpreter();
$packet = $this->getPacketString(self::$standardQueryResponseNoSuchName);
$decoded = $responseInterpreter->decode($packet);
list($id, $message) = $decoded;
$interpreted = $responseInterpreter->interpret($message, AddressModes::INET4_ADDR);
$this->assertNull($interpreted, "Response with 'no such name' was not interpreted to null.");
}
public function testMixed() {
$responseInterpreter = $this->createResponseInterpreter();
$packet = $this->getPacketString(self::$standardQueryResponseMixed);
$decoded = $responseInterpreter->decode($packet);
list($id, $message) = $decoded;
//Get the IPv4 part
$interpreted = $responseInterpreter->interpret($message, AddressModes::INET4_ADDR);
list($type, $addr, $ttl) = $interpreted;
$this->assertEquals(AddressModes::INET4_ADDR, $type);
$this->assertEquals('204.152.184.88', $addr);
$this->assertEquals(600, $ttl);
//Get the IPv6 part
$interpreted = $responseInterpreter->interpret($message, AddressModes::INET6_ADDR);
list($type, $addr, $ttl) = $interpreted;
$this->assertEquals(AddressModes::INET6_ADDR, $type);
$this->assertEquals('2001:4f8:0:2::d', $addr);
$this->assertEquals(600, $ttl);
}
public function testIPv4() {
$responseInterpreter = $this->createResponseInterpreter();
$packet = $this->getPacketString(self::$standardQueryResponseA);
$decoded = $responseInterpreter->decode($packet);
list($id, $message) = $decoded;
//Get the IPv4 part
$interpreted = $responseInterpreter->interpret($message, AddressModes::INET4_ADDR);
list($type, $addr, $ttl) = $interpreted;
$this->assertEquals(AddressModes::INET4_ADDR, $type);
$this->assertEquals('204.152.190.12', $addr);
$this->assertEquals(82159, $ttl);
//Get the IPv6 part
$interpreted = $responseInterpreter->interpret($message, AddressModes::INET6_ADDR);
$this->assertNull($interpreted);
}
public function testIPv6() {
$responseInterpreter = $this->createResponseInterpreter();
$packet = $this->getPacketString(self::$standardQueryResponseIPV6);
$decoded = $responseInterpreter->decode($packet);
list($id, $message) = $decoded;
//Get the IPv4 part
$interpreted = $responseInterpreter->interpret($message, AddressModes::INET4_ADDR);
$this->assertNull($interpreted);
//Get the IPv6 part
$interpreted = $responseInterpreter->interpret($message, AddressModes::INET6_ADDR);
list($type, $addr, $ttl) = $interpreted;
$this->assertEquals(AddressModes::INET6_ADDR, $type);
$this->assertEquals('2001:4f8:4:7:2e0:81ff:fe52:9a6b', $addr);
$this->assertEquals(86340, $ttl);
}
public function testCnameResponse() {
$responseInterpreter = $this->createResponseInterpreter();
$packet = $this->getPacketString(self::$standardQueryResponseCNAME);
$decoded = $responseInterpreter->decode($packet);
list($id, $message) = $decoded;
//Try to get an IPv4 answer - but actually get a CNAME
$interpreted = $responseInterpreter->interpret($message, AddressModes::INET4_ADDR);
list($type, $addr, $ttl) = $interpreted;
$this->assertEquals(AddressModes::CNAME, $type);
$this->assertEquals('www.l.google.com', $addr);
//Try to get an IPv6 answer - but actually get a CNAME
$interpreted = $responseInterpreter->interpret($message, AddressModes::INET6_ADDR);
list($type, $addr, $ttl) = $interpreted;
$this->assertEquals(AddressModes::CNAME, $type);
$this->assertEquals('www.l.google.com', $addr);
}
}
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