Mono.Zeroconf.Providers.Bonjour.BrowseService.OnQueryRecordReply C# (CSharp) Method

        private void OnQueryRecordReply(ServiceRef sdRef, ServiceFlags flags, uint interfaceIndex,
            ServiceError errorCode, string fullname, ServiceType rrtype, ServiceClass rrclass, ushort rdlen, 
            IntPtr rdata, uint ttl, IntPtr context)
        {
            switch(rrtype) {
                case ServiceType.A:
                    IPAddress address;

                    if(rdlen == 4) {
                        // ~4.5 times faster than Marshal.Copy into byte[4]
                        uint address_raw = (uint)(Marshal.ReadByte (rdata, 3) << 24);
                        address_raw |= (uint)(Marshal.ReadByte (rdata, 2) << 16);
                        address_raw |= (uint)(Marshal.ReadByte (rdata, 1) << 8);
                        address_raw |= (uint)Marshal.ReadByte (rdata, 0);

                        address = new IPAddress(address_raw);
                    } else if(rdlen == 16) {
                        byte [] address_raw = new byte[rdlen];
                        Marshal.Copy(rdata, address_raw, 0, rdlen);
                        address = new IPAddress(address_raw, interfaceIndex);
                    } else {
                        break;
                    }

                    if(hostentry == null) {
                        hostentry = new IPHostEntry();
                        hostentry.HostName = hosttarget;
                    }

                    if(hostentry.AddressList != null) {
                        ArrayList list = new ArrayList(hostentry.AddressList);
                        list.Add(address);
                        hostentry.AddressList = list.ToArray(typeof(IPAddress)) as IPAddress [];
                    } else {
                        hostentry.AddressList = new IPAddress [] { address };
                    }

                    ServiceResolvedEventHandler handler = Resolved;
                    if(handler != null) {
                        handler(this, new ServiceResolvedEventArgs(this));
                    }

                    break;
                case ServiceType.TXT:
                    if(TxtRecord != null) {
                        TxtRecord.Dispose();
                    }

                    TxtRecord = new TxtRecord(rdlen, rdata);
                    break;
                default:
                    break;
            }

            sdRef.Deallocate();
        }