private static void AnnounceService(Socket sock, String service)
{
IPEndPoint remoteEp = new IPEndPoint(IPAddress.Parse(mdnsIP), mdnsPort);
mDNSPacket dnsPkt = new mDNSPacket();
mDNSHeader mdnsHdr = new mDNSHeader();
mDNSAnswerRR mdnsAnRR = new mDNSAnswerRR(service, Type.AAAA, (Class.IN | Class.CF), 4500, 16);
Byte[] rdata = new Byte[16];
mdnsAnRR.RDATA = rdata;
mdnsHdr.AA = true;
mdnsHdr.TC = false;
mdnsHdr.RD = false;
mdnsHdr.RA = false;
mdnsHdr.RCODE = RespCode.NoError;
mdnsHdr.OPCODE = OpCode.QUERY;
mdnsHdr.QR = true;
mdnsHdr.qdcount = 0;
mdnsHdr.an_rrs = 1;
mdnsHdr.ns_rrs = 0;
mdnsHdr.ar_rrs = 0;
dnsPkt.Header = mdnsHdr;
dnsPkt.AnswerRR = mdnsAnRR;
dnsPkt.print();
Console.WriteLine("Announcing Service: " + service);
sock.SendTo(dnsPkt.data, remoteEp);
}
private static void SendQuery(Socket sock, String service)
{
IPEndPoint remoteEp = new IPEndPoint(IPAddress.Parse(mdnsIP), mdnsPort);
mDNSPacket dnsPkt = new mDNSPacket();
mDNSHeader mdnsHdr = new mDNSHeader();
mDNSQuestion mdnsQ = new mDNSQuestion(service, QType.ANY, QClass.IN);
mdnsHdr.AA = false;
mdnsHdr.TC = false;
mdnsHdr.RD = false;
mdnsHdr.RA = false;
mdnsHdr.RCODE = RespCode.NoError;
mdnsHdr.OPCODE = OpCode.QUERY;
mdnsHdr.QR = false;
mdnsHdr.qdcount = 1;
mdnsHdr.an_rrs = 0;
mdnsHdr.ns_rrs = 0;
mdnsHdr.ar_rrs = 0;
dnsPkt.Header = mdnsHdr;
dnsPkt.Question = mdnsQ;
dnsPkt.print();
Console.WriteLine("Sending Query: " + service);
sock.SendTo(dnsPkt.data, remoteEp);
}
static void PrintTestPacket()
{
mDNSPacket dnsPkt = new mDNSPacket();
mDNSHeader mdnsHdr = new mDNSHeader();
mDNSAnswerRR mdnsAnRR = new mDNSAnswerRR("_services._dns-sd._udp.local.", Type.TXT, Class.IN, 4500, 16);
mDNSAdditionalRR mdnsArRR = new mDNSAdditionalRR("_services._dns-sd._udp.local.", Type.TXT, Class.IN, 4500, 16);
Byte[] rdata = new Byte[16];
mdnsAnRR.RDATA = rdata;
mdnsArRR.RDATA = rdata;
mdnsHdr.AA = true;
mdnsHdr.TC = false;
mdnsHdr.RD = false;
mdnsHdr.RA = false;
mdnsHdr.RCODE = RespCode.NoError;
mdnsHdr.QR = true;
mdnsHdr.qdcount = 0;
mdnsHdr.an_rrs = 3;
mdnsHdr.ns_rrs = 0;
mdnsHdr.ar_rrs = 4;
dnsPkt.Header = mdnsHdr;
dnsPkt.AnswerRR = mdnsAnRR;
dnsPkt.AnswerRR = mdnsAnRR;
dnsPkt.AnswerRR = mdnsAnRR;
dnsPkt.AdditionalRR = mdnsArRR;
dnsPkt.AdditionalRR = mdnsArRR;
dnsPkt.AdditionalRR = mdnsArRR;
dnsPkt.AdditionalRR = mdnsArRR;
dnsPkt.print();
}
public mDNSPacket()
{
rawData = new Byte[1];
mdnsHdr = new mDNSHeader();
mdnsQs = new List <mDNSQuestion>();
mdnsAnRRs = new List <mDNSAnswerRR>();
mdnsNsRRs = new List <mDNSAuthorityRR>();
mdnsArRRs = new List <mDNSAdditionalRR>();
}
public mDNSPacket(Byte[] data)
{
int offset = mDNSHeader.ByteLen;
int i;
rawData = data;
mdnsHdr = new mDNSHeader(data);
mdnsQs = new List <mDNSQuestion>();
mdnsAnRRs = new List <mDNSAnswerRR>();
mdnsNsRRs = new List <mDNSAuthorityRR>();
mdnsArRRs = new List <mDNSAdditionalRR>();
Console.WriteLine("== Header ==");
mdnsHdr.print();
Console.WriteLine("== Questions ==");
for (i = 0; i < mdnsHdr.qdcount; i++)
{
mdnsQs.Add(new mDNSQuestion(data, offset));
offset += mdnsQs[i].ByteLen;
mdnsQs[i].print();
}
Console.WriteLine("== AnswerRRs ==");
for (i = 0; i < mdnsHdr.an_rrs; i++)
{
mdnsAnRRs.Add(new mDNSAnswerRR(data, offset));
offset += mdnsAnRRs[i].ByteLen;
mdnsAnRRs[i].print();
}
Console.WriteLine("== AuthorityRRs ==");
for (i = 0; i < mdnsHdr.ns_rrs; i++)
{
mdnsNsRRs.Add(new mDNSAuthorityRR(data, offset));
offset += mdnsNsRRs[i].ByteLen;
mdnsNsRRs[i].print();
}
Console.WriteLine("== AdditionalRRs ==");
for (i = 0; i < mdnsHdr.ar_rrs; i++)
{
mdnsArRRs.Add(new mDNSAdditionalRR(data, offset));
offset += mdnsArRRs[i].ByteLen;
mdnsArRRs[i].print();
}
Console.WriteLine("===================\n");
}
