private byte[] formHeader(dGramHeader dHead)
{
byte[] result = new byte[12];
result[0] = (byte)((dHead.ID >> 8) & 0xFF);
result[1] = (byte)(dHead.ID & 0xFF);
result[2] = (byte)((dHead.QR << 7) + (((byte)dHead.OpCode << 3) & 0xF) + (dHead.AA << 2) + (dHead.TC << 1) + dHead.RD);
result[3] = (byte)((dHead.RA << 7) + (dHead.Z << 4) + ((byte)dHead.RCode & 0xF));
result[4] = (byte)((dHead.QDCount >> 8) & 0xFF);
result[5] = (byte)(dHead.QDCount & 0xFF);
result[6] = (byte)((dHead.ANCount >> 8) & 0xFF);
result[7] = (byte)(dHead.ANCount & 0xFF);
result[8] = (byte)((dHead.NSCount >> 8) & 0xFF);
result[9] = (byte)(dHead.NSCount & 0xFF);
result[10] = (byte)((dHead.ARCount >> 8) & 0xFF);
result[11] = (byte)(dHead.ARCount & 0xFF);
return(result);
}
private byte[] dataGram(string domainName, SendBy sendBy)
{
string[] dName = domainName.Split('.');
uint dgLength = (uint)sendBy * 2;
uint bodyLength;
dGramHeader dHead = new dGramHeader();
dHead.ID = 0;
dHead.QR = 0;
dHead.OpCode = OpCodes.QUERY;
dHead.AA = 0;
dHead.TC = 0;
dHead.RD = 1;
dHead.RA = 0;
dHead.Z = 0;
dHead.RCode = RCodes.Success;
dHead.QDCount = 1;
dHead.ANCount = 0;
dHead.NSCount = 0;
dHead.ARCount = 0;
byte[] header = formHeader(dHead);
byte[] question = formQuestion(dName);
bodyLength = (uint)(header.Length + question.Length);
byte[] dGram = new byte[dgLength + bodyLength];
int ptr = 0;
if (sendBy == SendBy.TCP)
{
dGram[0] = (byte)((bodyLength >> 8) & 0xFF);
dGram[1] = (byte)(bodyLength & 0xFF);
ptr = 2;
}
for (int n = 0; n < header.Length; n++)
{
dGram[ptr] = header[n];
ptr += 1;
}
for (int m = 0; m < question.Length; m++)
{
dGram[ptr] = question[m];
ptr += 1;
}
return(dGram);
}
private byte[] formHeader(dGramHeader dHead)
{
byte[] result = new byte[12];
result[0] = (byte)((dHead.ID >> 8) & 0xFF);
result[1] = (byte)(dHead.ID & 0xFF);
result[2] = (byte)((dHead.QR << 7) + (((byte)dHead.OpCode << 3) & 0xF) + (dHead.AA << 2) + (dHead.TC << 1) + dHead.RD);
result[3] = (byte)((dHead.RA << 7) + (dHead.Z << 4) + ((byte)dHead.RCode & 0xF));
result[4] = (byte)((dHead.QDCount >> 8) & 0xFF);
result[5] = (byte)(dHead.QDCount & 0xFF);
result[6] = (byte)((dHead.ANCount >> 8) & 0xFF);
result[7] = (byte)(dHead.ANCount & 0xFF);
result[8] = (byte)((dHead.NSCount >> 8) & 0xFF);
result[9] = (byte)(dHead.NSCount & 0xFF);
result[10] = (byte)((dHead.ARCount >> 8) & 0xFF);
result[11] = (byte)(dHead.ARCount & 0xFF);
return result;
}
private byte[] dataGram(string domainName,SendBy sendBy)
{
string[] dName = domainName.Split('.');
uint dgLength = (uint)sendBy * 2;
uint bodyLength;
dGramHeader dHead = new dGramHeader();
dHead.ID = 0;
dHead.QR = 0;
dHead.OpCode = OpCodes.QUERY;
dHead.AA = 0;
dHead.TC = 0;
dHead.RD = 1;
dHead.RA = 0;
dHead.Z = 0;
dHead.RCode = RCodes.Success;
dHead.QDCount = 1;
dHead.ANCount = 0;
dHead.NSCount = 0;
dHead.ARCount = 0;
byte[] header = formHeader(dHead);
byte[] question = formQuestion(dName);
bodyLength = (uint)(header.Length + question.Length);
byte[] dGram = new byte[dgLength + bodyLength];
int ptr = 0;
if (sendBy == SendBy.TCP)
{
dGram[0] = (byte)((bodyLength >> 8) & 0xFF);
dGram[1] = (byte)(bodyLength & 0xFF);
ptr = 2;
}
for (int n = 0; n < header.Length; n++)
{
dGram[ptr] = header[n];
ptr += 1;
}
for (int m = 0; m < question.Length; m++)
{
dGram[ptr] = question[m];
ptr += 1;
}
return dGram;
}
