public DnsPacket(Packet packet)
{
Header = (packet.ApplicationHeader as DnsHeader);
if (Header == null) throw new ArgumentException("Non-Dns packet!");
NetBinaryReader nbr = new NetBinaryReader(Header.data);
Questions = new DnsQuestion[Header.QuestionCount];
for (int i = 0; i < Questions.Length; i++)
{
Questions[i] = new DnsQuestion(nbr);
}
Answers = new DnsAnswer[Header.AnswerCount];
for (int i = 0; i < Answers.Length; i++)
{
Answers[i] = new DnsAnswer(nbr);
}
Authority = new DnsAnswer[Header.AuthorityCount];
for (int i = 0; i < Authority.Length; i++)
{
Authority[i] = new DnsAnswer(nbr);
}
Information = new DnsAnswer[Header.AdditionalCount];
for (int i = 0; i < Information.Length; i++)
{
Information[i] = new DnsAnswer(nbr);
}
}
public Packet(byte[] raw, int byteCount)
{
rawData = raw;
IpHeader = new IPHeader(raw, byteCount);
switch (Protocol)
{
case (ProtocolType.Udp):
UdpHeader udpHeader = new UdpHeader(raw, IPHeader.OCTET_COUNT, byteCount);
TransportHeader = udpHeader;
if (udpHeader.IsDns) ApplicationHeader = new DnsHeader(raw, IPHeader.OCTET_COUNT + UdpHeader.OCTET_COUNT, byteCount);
break;
case (ProtocolType.Tcp):
TcpHeader tcpHeader = new TcpHeader(raw, IPHeader.OCTET_COUNT);
TransportHeader = tcpHeader;
break;
case (ProtocolType.Icmp):
IcmpHeader icmpHeader = new IcmpHeader(raw, IPHeader.OCTET_COUNT, byteCount);
TransportHeader = icmpHeader;
break;
}
}