public DNSInputStream DNSInput(byte[] bytes)
{
var compress = new CompressionInputContext(bytes);
var memory = new MemoryStream(bytes);
return(new DNSInputStream(memory, compress));
}
public void TestUncompressionFirstUse()
{
var compress = new CompressionInputContext(new byte[]
{
7, // Length of 'example'
101,
120,
97,
109,
112,
108,
101,
3, // Length of com
99,
111,
109,
0 // Length of root
});
Tuple <Domain, int> domain_info = compress.ReadDomainAt(0);
var expected_domain = new Domain("example.com");
var expected_offset = 13;
Assert.That(domain_info.Item1, Is.EqualTo(expected_domain));
Assert.That(domain_info.Item2, Is.EqualTo(expected_offset));
}
public void TestUncompressionPointer()
{
var compress = new CompressionInputContext(new byte[]
{
7, // Length of 'example'
101,
120,
97,
109,
112,
108,
101,
3, // Length of com
99,
111,
109,
0, // Length of root
3, // Length of dns
100,
110,
115,
// Pointer to start of context
192,
0
});
Tuple <Domain, int> domain_info = compress.ReadDomainAt(13);
var expected_domain = new Domain("dns.example.com");
var expected_offset = 19;
Assert.That(domain_info.Item1, Is.EqualTo(expected_domain));
Assert.That(domain_info.Item2, Is.EqualTo(expected_offset));
}
/**
* A convenience wrapper around Unserialize.
*/
public static DNSPacket FromBytes(byte[] bytes)
{
var buffer_stream = new MemoryStream(bytes);
var compress = new CompressionInputContext(bytes);
var dns_in = new DNSInputStream(buffer_stream, compress);
return(Unserialize(dns_in));
}
public DNSInputStream(Stream stream, CompressionInputContext compress)
{
this.stream = stream;
this.compress = compress;
}