public override string ToString()
{
var sb = new StringBuilder();
sb.Append("Message Type (op): ").AppendLine(MessageType.ToString());
sb.Append("Hardware Address Type (htype): ").AppendLine(HardwareAddressType.ToString());
sb.Append("Hardware Address Length (hlen): ").AppendLine(HardwareAddressLength.ToString());
sb.Append("Gateway Hops (hops): ").AppendLine(GatewayHops.ToString());
sb.Append("Transaction Id (xid): ").AppendLine(TransactionId.ToString());
sb.Append("Seconds Elapsed (secs): ").AppendLine(SecondsElapsed.ToString());
sb.Append("Flags (flags): ").AppendLine(Convert.ToString((int)Flags, 2));
foreach (DhcpServerPacketFlags flag in Enum.GetValues(typeof(DhcpServerPacketFlags)))
{
sb.Append(" ");
var mask = Convert.ToString((short)flag, 2).Replace('0', '.');
if (Flags.HasFlag(flag))
{
sb.Append(mask).Append(": ").AppendLine(flag.ToString());
}
else
{
sb.Append(mask.Replace('1', '0')).Append(": No ").AppendLine(flag.ToString());
}
}
sb.Append("Client IP Address (ciaddr): ").AppendLine(ClientIpAddress.ToString());
sb.Append("Your IP Address (yiaddr): ").AppendLine(YourIpAddress.ToString());
sb.Append("Next Server IP Address (siaddr): ").AppendLine(NextServerIpAddress.ToString());
sb.Append("Relay Agent IP Address (giaddr): ").AppendLine(RelayAgentIpAddress.ToString());
sb.Append("Client Hardware Address (chaddr): ").AppendLine(ClientHardwareAddress.ToString());
sb.Append("Server Host Name (sname): ").AppendLine(ServerHostName);
sb.Append("File Name (file): ").AppendLine(FileName);
sb.Append("Options Magic Cookie: ").AppendLine(OptionsMagicCookie.ToString());
var options = Options.ToList();
if (options.Count == 0)
{
sb.Append("Options: None");
}
else
{
sb.Append("Options:");
foreach (var option in options)
{
sb.AppendLine();
sb.Append(" ");
sb.Append(((byte)option.Id).ToString("000"));
sb.Append(" ");
sb.Append(option.Id.ToString());
sb.Append(" [");
sb.Append(option.Type.ToString());
sb.AppendLine("]");
sb.Append(" ");
option.DataAsFormatted(sb);
}
}
return(sb.ToString());
}
public Boolean TryWriteTo(Byte[] buffer)
{
try
{
buffer[0] = (Byte)Operation;
buffer[1] = (Byte)HardwareAddressType;
buffer[2] = HardwareLength;
buffer[3] = Hops;
BitConverter.TryWriteBytes(new Span <Byte>(buffer, 4, 4), SessionId);
BitConverter.TryWriteBytes(new Span <Byte>(buffer, 8, 2), Seconds);
BitConverter.TryWriteBytes(new Span <Byte>(buffer, 10, 2), Flags);
ClientIpAddress.TryWriteBytes(new Span <Byte>(buffer, 12, 4), out _);
YourIpAddress.TryWriteBytes(new Span <Byte>(buffer, 16, 4), out _);
ServerIdentifierAddress.TryWriteBytes(new Span <Byte>(buffer, 20, 4), out _);
GatewayOrRelayAddress.TryWriteBytes(new Span <Byte>(buffer, 24, 4), out _);
ClientHardwareAddress.GetAddressBytes().CopyTo(new Span <Byte>(buffer, 28, 16));
Encoding.UTF8.GetBytes(ServerHostName).CopyTo(new Span <Byte>(buffer, 44, 64));
Encoding.UTF8.GetBytes(BootFileName).CopyTo(new Span <Byte>(buffer, 108, 128));
BitConverter.TryWriteBytes(new Span <Byte>(buffer, 236, 4), MagicCookie);
var index = 240;
foreach (var option in Options)
{
buffer[index] = (Byte)option.Key;
Byte dataLength = 0;
switch (option.Value)
{
case IPAddress iPAddress:
buffer[index + 1] = dataLength = 4;
iPAddress.TryWriteBytes(new Span <Byte>(buffer, index + 2, dataLength), out _);
break;
case IPAddress[] iPAddresses:
buffer[index + 1] = dataLength = (Byte)(4 * iPAddresses.Length);
var offset = 0;
foreach (var iPAddress in iPAddresses)
{
iPAddress.TryWriteBytes(new Span <Byte>(buffer, index + 2 + offset, dataLength), out _);
offset += 4;
}
break;
case Byte[] bytes:
buffer[index + 1] = dataLength = (Byte)bytes.Length;
bytes.CopyTo(new Span <Byte>(buffer, index + 2, dataLength));
break;
case Byte b:
buffer[index + 1] = dataLength = 1;
buffer[index + 2] = b;
break;
case MessageType messageType:
buffer[index + 1] = dataLength = 1;
buffer[index + 2] = (Byte)messageType;
break;
case UInt32 uintVal:
buffer[index + 1] = dataLength = 4;
BitConverter.TryWriteBytes(new Span <Byte>(buffer, index + 2, dataLength), uintVal);
break;
default:
throw new NotSupportedException();
}
index += dataLength + 2;
}
}
catch { return(false); }
return(true);
}
