private void ReceiveCallback(IAsyncResult ar)
{
if (!_done)
{
try
{
IPEndPoint endpoint = null;
byte[] data = _in.EndReceive(ar, ref endpoint);
if ((data != null) && (data.Length > 0) && (!_done))
{
Log(LogLevels.Trace, "DHCP Message recieved, translating...");
DHCPMessage msg = new DHCPMessage(data, _log);
Log(LogLevels.Trace, "DHCP message received: TYPE: " + msg.Type.ToString() + " FOR MAC: " + BytesToReadableMAC(msg.MAC));
string tmp = "DHCP OPTIONS: ";
foreach (DHCPOption opt in msg.Options)
{
tmp += opt.Type.ToString() + ": " + System.Text.ASCIIEncoding.ASCII.GetString(opt.Value) + "\n";
}
Log(LogLevels.Trace, tmp);
tmp = "REQUESTED OPTIONS: ";
foreach (DHCPOptionEnum otype in msg.RequestedOptions)
{
tmp += otype.ToString() + ", ";
}
Log(LogLevels.Trace, tmp);
DateTime start = DateTime.Now;
ProcessMessage(msg);
Log(LogLevels.Trace, "Time to process DHCP message: " + DateTime.Now.Subtract(start).TotalMilliseconds.ToString() + "ms");
if (!_done)
{
Log(LogLevels.Trace, "Message received for DHCP Server restarting async recieve to obtain next message.");
_in.BeginReceive(new AsyncCallback(ReceiveCallback), null);
}
}
}
catch (Exception err)
{
Log(LogLevels.Trace, "An error occured processing the message, restarting receive...");
Log(err);
if (!_done)
{
Log(LogLevels.Trace, "Message received for DHCP Server restarting async recieve to obtain next message.");
_in.BeginReceive(new AsyncCallback(ReceiveCallback), null);
}
}
}
}
private void ProcessRequest(DHCPMessage msg)
{
if (msg[DHCPOptionEnum.ServerIdentifier] != null)
{
if (new IPAddress(msg[DHCPOptionEnum.ServerIdentifier]).ToString() != _serverIP.ToString())
{
return;
}
}
string mac = BytesToReadableMAC(msg.MAC);
IPAddress ip = _getIP(mac.Replace(":", ""));
Dictionary <DHCPOptionEnum, object> options = _getOptions(mac.Replace(":", ""));
msg.Type = DHCPMsgType.DHCPACK;
msg.OpCode = DHCPOpCode.BOOTREPLY;
msg = SetDHCPOptions(msg, ip, options);
msg.Seconds = (short)DateTime.Now.Subtract(msg.Start).TotalSeconds;
byte[] bmsg = msg.Bytes;
_out.Send(bmsg, bmsg.Length, _outPoint);
return;
}
private void ProcessMessage(DHCPMessage msg)
{
if (msg.OpCode == DHCPOpCode.BOOTREQUEST)
{
switch (msg.Type)
{
case DHCPMsgType.DHCPDISCOVER:
case DHCPMsgType.DHCPREQUEST:
ProcessRequest(msg);
break;
case DHCPMsgType.DHCPDECLINE:
case DHCPMsgType.DHCPRELEASE:
ProcessDecline(msg);
break;
case DHCPMsgType.DHCPINFORM:
ProcessInform(msg);
break;
}
}
}
private DHCPMessage SetDHCPOptions(DHCPMessage msg, IPAddress ip,Dictionary<DHCPOptionEnum,object> options)
{
if (!options.ContainsKey(DHCPOptionEnum.IPAddressLeaseTime))
options.Add(DHCPOptionEnum.IPAddressLeaseTime,(3600*24));
if (options.ContainsKey(DHCPOptionEnum.ServerIdentifier))
options.Remove(DHCPOptionEnum.ServerIdentifier);
options.Add(DHCPOptionEnum.ServerIdentifier, _serverIP);
msg.AssignedIP = ip;
msg.ServerIP = _serverIP;
foreach (DHCPOptionEnum opt in options.Keys)
{
Log(LogLevels.Trace, "Setting option " + opt.ToString() + " for request");
msg[opt] = null;
if (options[opt] is byte[])
msg[opt] = (byte[])options[opt];
else if (options[opt] is List<byte>)
msg[opt] = ((List<byte>)options[opt]).ToArray();
else if (options[opt] is MemoryStream)
msg[opt] = ((MemoryStream)options[opt]).ToArray();
else if (_regHex.IsMatch(options[opt].ToString()))
msg[opt] = HexStringToByte(options[opt].ToString());
else
{
switch (opt)
{
case DHCPOptionEnum.DomainNameServer:
case DHCPOptionEnum.NetworkInformationServers:
case DHCPOptionEnum.NetworkTimeProtocolServers:
case DHCPOptionEnum.NetBIOSoverTCPIPNameServer:
case DHCPOptionEnum.NetBIOSoverTCPIPDatagramDistributionServer:
case DHCPOptionEnum.XWindowSystemDisplayManager:
case DHCPOptionEnum.XWindowSystemFontServer:
case DHCPOptionEnum.NetworkInformationServicePlusServers:
case DHCPOptionEnum.SMTPServer:
case DHCPOptionEnum.NNTPServer:
case DHCPOptionEnum.DefaultWWWServer:
case DHCPOptionEnum.DefaultFingerServer:
case DHCPOptionEnum.DefaultIRCServer:
case DHCPOptionEnum.StreetTalkServer:
case DHCPOptionEnum.STDAServer:
case DHCPOptionEnum.BCMCSControllerIPv4AddressList:
List<byte> tips = new List<byte>();
if (options[opt] is IPAddress)
msg[opt] = ((IPAddress)options[opt]).GetAddressBytes();
else if (options[opt] is string)
{
if (((string)options[opt]).Contains(","))
{
foreach (string str in ((string)options[opt]).Split(','))
tips.AddRange(IPAddress.Parse(str).GetAddressBytes());
msg[opt] = tips.ToArray();
}
else if (((string)options[opt]).Contains(" "))
{
foreach (string str in ((string)options[opt]).Split(' '))
tips.AddRange(IPAddress.Parse(str).GetAddressBytes());
msg[opt] = tips.ToArray();
}
else
msg[opt] = IPAddress.Parse((string)options[opt]).GetAddressBytes();
}
else if (options[opt] is IPAddress[] || options[opt] is List<IPAddress>)
{
foreach (IPAddress dip in (options[opt] is IPAddress[] ? (IPAddress[])options[opt] : ((List<IPAddress>)options[opt]).ToArray()))
tips.AddRange(dip.GetAddressBytes());
msg[opt] = tips.ToArray();
}
else if (options[opt] is string[] || options[opt] is List<string>)
{
foreach (string str in (options[opt] is string[] ? (string[])options[opt] : ((List<string>)options[opt]).ToArray()))
tips.AddRange(IPAddress.Parse(str).GetAddressBytes());
msg[opt] = tips.ToArray();
}
break;
case DHCPOptionEnum.PolicyFilter:
List<byte> tpfs = new List<byte>();
if (options[opt] is string)
{
string spf = (string)options[opt];
if (spf.Contains(","))
{
foreach (string str in spf.Split(','))
{
if (str.Length > 0)
{
tpfs.AddRange(IPAddress.Parse(str.Substring(0, str.IndexOf("/"))).GetAddressBytes());
tpfs.AddRange(IPAddress.Parse(str.Substring(str.IndexOf("/") + 1)).GetAddressBytes());
}
}
}
else if (spf.Contains(" "))
{
foreach (string str in spf.Split(' '))
{
if (str.Length > 0)
{
tpfs.AddRange(IPAddress.Parse(str.Substring(0, str.IndexOf("/"))).GetAddressBytes());
tpfs.AddRange(IPAddress.Parse(str.Substring(str.IndexOf("/") + 1)).GetAddressBytes());
}
}
}
msg[opt] = (tpfs.Count > 0 ? tpfs.ToArray() : null);
}
break;
case DHCPOptionEnum.StaticRoute:
List<byte> tsrs = new List<byte>();
if (options[opt] is string)
{
string srs = (string)options[opt];
if (srs.Contains(","))
{
foreach (string str in srs.Split(','))
{
if (str.Length > 0)
{
tsrs.AddRange(IPAddress.Parse(str.Substring(0, str.IndexOf("-"))).GetAddressBytes());
tsrs.AddRange(IPAddress.Parse(str.Substring(str.IndexOf("-") + 1)).GetAddressBytes());
}
}
}
else if (srs.Contains(" "))
{
foreach (string str in srs.Split(' '))
{
if (str.Length > 0)
{
tsrs.AddRange(IPAddress.Parse(str.Substring(0, str.IndexOf("-"))).GetAddressBytes());
tsrs.AddRange(IPAddress.Parse(str.Substring(str.IndexOf("-") + 1)).GetAddressBytes());
}
}
}
msg[opt] = (tsrs.Count > 0 ? tsrs.ToArray() : null);
}
break;
case DHCPOptionEnum.AllSubnetsAreLocal:
case DHCPOptionEnum.IpForwarding:
case DHCPOptionEnum.NonLocalSourceRouting:
case DHCPOptionEnum.PerformMaskDiscovery:
case DHCPOptionEnum.MaskSupplier:
case DHCPOptionEnum.PerformRouterDiscovery:
case DHCPOptionEnum.TrailerEncapsulation:
case DHCPOptionEnum.EthernetEncapsulation:
case DHCPOptionEnum.TCPKeepaliveGarbage:
case DHCPOptionEnum.OptionOverload:
case DHCPOptionEnum.AutoConfigure:
if (options[opt] is bool)
msg[opt] = new byte[] { (byte)((bool)options[opt] ? 1 : 0) };
else if (options[opt] is string)
msg[opt] = new byte[] { (byte)(bool.Parse((string)options[opt]) ? 1 : 0) };
break;
case DHCPOptionEnum.DefaultIPTimeToLive:
case DHCPOptionEnum.TCPDefaultTTL:
case DHCPOptionEnum.NetBIOSoverTCPIPNodeType:
case DHCPOptionEnum.DHCPMessageTYPE:
if (options[opt] is byte)
msg[opt] = new byte[] { (byte)options[opt] };
else if (options[opt] is string)
msg[opt] = new byte[] { byte.Parse((string)options[opt]) };
else if (options[opt] is int || options[opt] is Int32 || options[opt] is Int16 || options[opt] is Int16 || options[opt] is Int64 || options[opt] is long || options[opt] is double || options[opt] is Double || options[opt] is decimal || options[opt] is Decimal || options[opt] is uint || options[opt] is UInt16 || options[opt] is UInt32 || options[opt] is UInt64 || options[opt] is ushort || options[opt] is ulong || options[opt] is float)
msg[opt] = new byte[] { byte.Parse(options[opt].ToString()) };
break;
case DHCPOptionEnum.AssociatedIP:
case DHCPOptionEnum.RequestedIPAddress:
case DHCPOptionEnum.SubnetMask:
case DHCPOptionEnum.Router:
case DHCPOptionEnum.TimeServer:
case DHCPOptionEnum.NameServer:
case DHCPOptionEnum.LogServer:
case DHCPOptionEnum.CookieServer:
case DHCPOptionEnum.LPRServer:
case DHCPOptionEnum.ImpressServer:
case DHCPOptionEnum.ResourceLocServer:
case DHCPOptionEnum.SwapServer:
case DHCPOptionEnum.BroadcastAddress:
case DHCPOptionEnum.RouterSolicitationAddress:
case DHCPOptionEnum.ServerIdentifier:
case DHCPOptionEnum.SubnetSelection:
if (options[opt] is string)
msg[opt] = IPAddress.Parse((string)options[opt]).GetAddressBytes();
else if (options[opt] is IPAddress)
msg[opt] = ((IPAddress)options[opt]).GetAddressBytes();
break;
case DHCPOptionEnum.TimeOffset:
if (options[opt] is string)
msg[opt] = BitConverter.GetBytes(int.Parse((string)options[opt]));
else if (options[opt] is int || options[opt] is Int32 || options[opt] is Int16 || options[opt] is Int16 || options[opt] is Int64 || options[opt] is long || options[opt] is double || options[opt] is Double || options[opt] is decimal || options[opt] is Decimal || options[opt] is uint || options[opt] is UInt16 || options[opt] is UInt32 || options[opt] is UInt64 || options[opt] is ushort || options[opt] is ulong || options[opt] is float)
msg[opt] = BitConverter.GetBytes(int.Parse(options[opt].ToString()));
break;
case DHCPOptionEnum.PathMTUAgingTimeout:
case DHCPOptionEnum.ARPCacheTimeout:
case DHCPOptionEnum.TCPKeepaliveInterval:
case DHCPOptionEnum.IPAddressLeaseTime:
case DHCPOptionEnum.RenewalTimeValue_T1:
case DHCPOptionEnum.RebindingTimeValue_T2:
case DHCPOptionEnum.ClientLastTransactionTime:
if (options[opt] is string)
msg[opt] = BitConverter.GetBytes(uint.Parse((string)options[opt]));
else if (options[opt] is int || options[opt] is Int32 || options[opt] is Int16 || options[opt] is Int16 || options[opt] is Int64 || options[opt] is long || options[opt] is double || options[opt] is Double || options[opt] is decimal || options[opt] is Decimal || options[opt] is uint || options[opt] is UInt16 || options[opt] is UInt32 || options[opt] is UInt64 || options[opt] is ushort || options[opt] is ulong || options[opt] is float)
msg[opt] = BitConverter.GetBytes(uint.Parse(options[opt].ToString()));
break;
case DHCPOptionEnum.BootFileSize:
case DHCPOptionEnum.MaximumDatagramReAssemblySize:
case DHCPOptionEnum.InterfaceMTU:
case DHCPOptionEnum.MaximumDHCPMessageSize:
if (options[opt] is string)
msg[opt] = BitConverter.GetBytes(ushort.Parse((string)options[opt]));
else if (options[opt] is int || options[opt] is Int32 || options[opt] is Int16 || options[opt] is Int16 || options[opt] is Int64 || options[opt] is long || options[opt] is double || options[opt] is Double || options[opt] is decimal || options[opt] is Decimal || options[opt] is uint || options[opt] is UInt16 || options[opt] is UInt32 || options[opt] is UInt64 || options[opt] is ushort || options[opt] is ulong || options[opt] is float)
msg[opt] = BitConverter.GetBytes(ushort.Parse(options[opt].ToString()));
break;
case DHCPOptionEnum.PathMTUPlateauTable:
List<byte> tmtu = new List<byte>();
if (options[opt] is string)
{
string smtu = (string)options[opt];
if (smtu.Contains(","))
{
foreach (string str in smtu.Split(','))
{
if (str.Length > 0)
tmtu.AddRange(BitConverter.GetBytes(ushort.Parse(str)));
}
}
else if (smtu.Contains(" "))
{
foreach (string str in smtu.Split(' '))
{
if (str.Length > 0)
tmtu.AddRange(BitConverter.GetBytes(ushort.Parse(str)));
}
}
}
else if (options[opt] is ushort[] || options[opt] is List<ushort>)
{
foreach (ushort us in (options[opt] is ushort[] ? (ushort[])options[opt] : ((List<ushort>)options[opt]).ToArray()))
tmtu.AddRange(BitConverter.GetBytes(us));
}
msg[opt] = (tmtu.Count > 0 ? tmtu.ToArray() : null);
break;
default:
if (options[opt] is string)
msg[opt] = ASCIIEncoding.ASCII.GetBytes((string)options[opt]);
break;
}
if (msg[opt] == null)
throw new Exception("Unable to convert object " + options[opt].GetType().FullName + " for option " + opt.ToString());
else
Log(LogLevels.Trace, "Set option " + opt.ToString() + " for request");
}
}
msg[DHCPOptionEnum.ParameterRequestList] = null;
return msg;
}
private void ReceiveCallback(IAsyncResult ar)
{
if (!_done)
{
try
{
IPEndPoint endpoint = null;
byte[] data = _in.EndReceive(ar, ref endpoint);
if ((data != null) && (data.Length > 0) && (!_done))
{
Log(LogLevels.Trace,"DHCP Message recieved, translating...");
DHCPMessage msg = new DHCPMessage(data,_log);
Log(LogLevels.Trace,"DHCP message received: TYPE: " + msg.Type.ToString()+" FOR MAC: "+BytesToReadableMAC(msg.MAC));
string tmp = "DHCP OPTIONS: ";
foreach (DHCPOption opt in msg.Options)
tmp += opt.Type.ToString() + ": " + System.Text.ASCIIEncoding.ASCII.GetString(opt.Value) + "\n";
Log(LogLevels.Trace,tmp);
tmp = "REQUESTED OPTIONS: ";
foreach (DHCPOptionEnum otype in msg.RequestedOptions)
tmp += otype.ToString() + ", ";
Log(LogLevels.Trace,tmp);
DateTime start = DateTime.Now;
ProcessMessage(msg);
Log(LogLevels.Trace,"Time to process DHCP message: " + DateTime.Now.Subtract(start).TotalMilliseconds.ToString() + "ms");
if (!_done)
{
Log(LogLevels.Trace,"Message received for DHCP Server restarting async recieve to obtain next message.");
_in.BeginReceive(new AsyncCallback(ReceiveCallback), null);
}
}
}
catch (Exception err)
{
Log(LogLevels.Trace,"An error occured processing the message, restarting receive...");
Log(err);
if (!_done)
{
Log(LogLevels.Trace,"Message received for DHCP Server restarting async recieve to obtain next message.");
_in.BeginReceive(new AsyncCallback(ReceiveCallback), null);
}
}
}
}
private void ProcessRequest(DHCPMessage msg)
{
if (msg[DHCPOptionEnum.ServerIdentifier] != null)
{
if (new IPAddress(msg[DHCPOptionEnum.ServerIdentifier]).ToString() != _serverIP.ToString())
return;
}
string mac = BytesToReadableMAC(msg.MAC);
IPAddress ip = _getIP(mac.Replace(":", ""));
Dictionary<DHCPOptionEnum, object> options = _getOptions(mac.Replace(":", ""));
msg.Type = DHCPMsgType.DHCPACK;
msg.OpCode = DHCPOpCode.BOOTREPLY;
msg = SetDHCPOptions(msg, ip, options);
msg.Seconds = (short)DateTime.Now.Subtract(msg.Start).TotalSeconds;
byte[] bmsg = msg.Bytes;
_out.Send(bmsg, bmsg.Length, _outPoint);
return;
}
private void ProcessMessage(DHCPMessage msg)
{
if (msg.OpCode == DHCPOpCode.BOOTREQUEST)
{
switch (msg.Type)
{
case DHCPMsgType.DHCPDISCOVER:
case DHCPMsgType.DHCPREQUEST:
ProcessRequest(msg);
break;
case DHCPMsgType.DHCPDECLINE:
case DHCPMsgType.DHCPRELEASE:
ProcessDecline(msg);
break;
case DHCPMsgType.DHCPINFORM:
ProcessInform(msg);
break;
}
}
}
private void ProcessDecline(DHCPMessage msg)
{
_releaseIP(BytesToReadableMAC(msg.MAC).Replace(":", ""),msg.AssignedIP);
}
private DHCPMessage SetDHCPOptions(DHCPMessage msg, IPAddress ip, Dictionary <DHCPOptionEnum, object> options)
{
if (!options.ContainsKey(DHCPOptionEnum.IPAddressLeaseTime))
{
options.Add(DHCPOptionEnum.IPAddressLeaseTime, (3600 * 24));
}
if (options.ContainsKey(DHCPOptionEnum.ServerIdentifier))
{
options.Remove(DHCPOptionEnum.ServerIdentifier);
}
options.Add(DHCPOptionEnum.ServerIdentifier, _serverIP);
msg.AssignedIP = ip;
msg.ServerIP = _serverIP;
foreach (DHCPOptionEnum opt in options.Keys)
{
Log(LogLevels.Trace, "Setting option " + opt.ToString() + " for request");
msg[opt] = null;
if (options[opt] is byte[])
{
msg[opt] = (byte[])options[opt];
}
else if (options[opt] is List <byte> )
{
msg[opt] = ((List <byte>)options[opt]).ToArray();
}
else if (options[opt] is MemoryStream)
{
msg[opt] = ((MemoryStream)options[opt]).ToArray();
}
else if (_regHex.IsMatch(options[opt].ToString()))
{
msg[opt] = HexStringToByte(options[opt].ToString());
}
else
{
switch (opt)
{
case DHCPOptionEnum.DomainNameServer:
case DHCPOptionEnum.NetworkInformationServers:
case DHCPOptionEnum.NetworkTimeProtocolServers:
case DHCPOptionEnum.NetBIOSoverTCPIPNameServer:
case DHCPOptionEnum.NetBIOSoverTCPIPDatagramDistributionServer:
case DHCPOptionEnum.XWindowSystemDisplayManager:
case DHCPOptionEnum.XWindowSystemFontServer:
case DHCPOptionEnum.NetworkInformationServicePlusServers:
case DHCPOptionEnum.SMTPServer:
case DHCPOptionEnum.NNTPServer:
case DHCPOptionEnum.DefaultWWWServer:
case DHCPOptionEnum.DefaultFingerServer:
case DHCPOptionEnum.DefaultIRCServer:
case DHCPOptionEnum.StreetTalkServer:
case DHCPOptionEnum.STDAServer:
case DHCPOptionEnum.BCMCSControllerIPv4AddressList:
List <byte> tips = new List <byte>();
if (options[opt] is IPAddress)
{
msg[opt] = ((IPAddress)options[opt]).GetAddressBytes();
}
else if (options[opt] is string)
{
if (((string)options[opt]).Contains(","))
{
foreach (string str in ((string)options[opt]).Split(','))
{
tips.AddRange(IPAddress.Parse(str).GetAddressBytes());
}
msg[opt] = tips.ToArray();
}
else if (((string)options[opt]).Contains(" "))
{
foreach (string str in ((string)options[opt]).Split(' '))
{
tips.AddRange(IPAddress.Parse(str).GetAddressBytes());
}
msg[opt] = tips.ToArray();
}
else
{
msg[opt] = IPAddress.Parse((string)options[opt]).GetAddressBytes();
}
}
else if (options[opt] is IPAddress[] || options[opt] is List <IPAddress> )
{
foreach (IPAddress dip in (options[opt] is IPAddress[] ? (IPAddress[])options[opt] : ((List <IPAddress>)options[opt]).ToArray()))
{
tips.AddRange(dip.GetAddressBytes());
}
msg[opt] = tips.ToArray();
}
else if (options[opt] is string[] || options[opt] is List <string> )
{
foreach (string str in (options[opt] is string[] ? (string[])options[opt] : ((List <string>)options[opt]).ToArray()))
{
tips.AddRange(IPAddress.Parse(str).GetAddressBytes());
}
msg[opt] = tips.ToArray();
}
break;
case DHCPOptionEnum.PolicyFilter:
List <byte> tpfs = new List <byte>();
if (options[opt] is string)
{
string spf = (string)options[opt];
if (spf.Contains(","))
{
foreach (string str in spf.Split(','))
{
if (str.Length > 0)
{
tpfs.AddRange(IPAddress.Parse(str.Substring(0, str.IndexOf("/"))).GetAddressBytes());
tpfs.AddRange(IPAddress.Parse(str.Substring(str.IndexOf("/") + 1)).GetAddressBytes());
}
}
}
else if (spf.Contains(" "))
{
foreach (string str in spf.Split(' '))
{
if (str.Length > 0)
{
tpfs.AddRange(IPAddress.Parse(str.Substring(0, str.IndexOf("/"))).GetAddressBytes());
tpfs.AddRange(IPAddress.Parse(str.Substring(str.IndexOf("/") + 1)).GetAddressBytes());
}
}
}
msg[opt] = (tpfs.Count > 0 ? tpfs.ToArray() : null);
}
break;
case DHCPOptionEnum.StaticRoute:
List <byte> tsrs = new List <byte>();
if (options[opt] is string)
{
string srs = (string)options[opt];
if (srs.Contains(","))
{
foreach (string str in srs.Split(','))
{
if (str.Length > 0)
{
tsrs.AddRange(IPAddress.Parse(str.Substring(0, str.IndexOf("-"))).GetAddressBytes());
tsrs.AddRange(IPAddress.Parse(str.Substring(str.IndexOf("-") + 1)).GetAddressBytes());
}
}
}
else if (srs.Contains(" "))
{
foreach (string str in srs.Split(' '))
{
if (str.Length > 0)
{
tsrs.AddRange(IPAddress.Parse(str.Substring(0, str.IndexOf("-"))).GetAddressBytes());
tsrs.AddRange(IPAddress.Parse(str.Substring(str.IndexOf("-") + 1)).GetAddressBytes());
}
}
}
msg[opt] = (tsrs.Count > 0 ? tsrs.ToArray() : null);
}
break;
case DHCPOptionEnum.AllSubnetsAreLocal:
case DHCPOptionEnum.IpForwarding:
case DHCPOptionEnum.NonLocalSourceRouting:
case DHCPOptionEnum.PerformMaskDiscovery:
case DHCPOptionEnum.MaskSupplier:
case DHCPOptionEnum.PerformRouterDiscovery:
case DHCPOptionEnum.TrailerEncapsulation:
case DHCPOptionEnum.EthernetEncapsulation:
case DHCPOptionEnum.TCPKeepaliveGarbage:
case DHCPOptionEnum.OptionOverload:
case DHCPOptionEnum.AutoConfigure:
if (options[opt] is bool)
{
msg[opt] = new byte[] { (byte)((bool)options[opt] ? 1 : 0) }
}
;
else if (options[opt] is string)
{
msg[opt] = new byte[] { (byte)(bool.Parse((string)options[opt]) ? 1 : 0) }
}
;
break;
case DHCPOptionEnum.DefaultIPTimeToLive:
case DHCPOptionEnum.TCPDefaultTTL:
case DHCPOptionEnum.NetBIOSoverTCPIPNodeType:
case DHCPOptionEnum.DHCPMessageTYPE:
if (options[opt] is byte)
{
msg[opt] = new byte[] { (byte)options[opt] }
}
;
else if (options[opt] is string)
{
msg[opt] = new byte[] { byte.Parse((string)options[opt]) }
}
;
else if (options[opt] is int || options[opt] is Int32 || options[opt] is Int16 || options[opt] is Int16 || options[opt] is Int64 || options[opt] is long || options[opt] is double || options[opt] is Double || options[opt] is decimal || options[opt] is Decimal || options[opt] is uint || options[opt] is UInt16 || options[opt] is UInt32 || options[opt] is UInt64 || options[opt] is ushort || options[opt] is ulong || options[opt] is float)
{
msg[opt] = new byte[] { byte.Parse(options[opt].ToString()) }
}
;
break;
case DHCPOptionEnum.AssociatedIP:
case DHCPOptionEnum.RequestedIPAddress:
case DHCPOptionEnum.SubnetMask:
case DHCPOptionEnum.Router:
case DHCPOptionEnum.TimeServer:
case DHCPOptionEnum.NameServer:
case DHCPOptionEnum.LogServer:
case DHCPOptionEnum.CookieServer:
case DHCPOptionEnum.LPRServer:
case DHCPOptionEnum.ImpressServer:
case DHCPOptionEnum.ResourceLocServer:
case DHCPOptionEnum.SwapServer:
case DHCPOptionEnum.BroadcastAddress:
case DHCPOptionEnum.RouterSolicitationAddress:
case DHCPOptionEnum.ServerIdentifier:
case DHCPOptionEnum.SubnetSelection:
if (options[opt] is string)
{
msg[opt] = IPAddress.Parse((string)options[opt]).GetAddressBytes();
}
else if (options[opt] is IPAddress)
{
msg[opt] = ((IPAddress)options[opt]).GetAddressBytes();
}
break;
case DHCPOptionEnum.TimeOffset:
if (options[opt] is string)
{
msg[opt] = BitConverter.GetBytes(int.Parse((string)options[opt]));
}
else if (options[opt] is int || options[opt] is Int32 || options[opt] is Int16 || options[opt] is Int16 || options[opt] is Int64 || options[opt] is long || options[opt] is double || options[opt] is Double || options[opt] is decimal || options[opt] is Decimal || options[opt] is uint || options[opt] is UInt16 || options[opt] is UInt32 || options[opt] is UInt64 || options[opt] is ushort || options[opt] is ulong || options[opt] is float)
{
msg[opt] = BitConverter.GetBytes(int.Parse(options[opt].ToString()));
}
break;
case DHCPOptionEnum.PathMTUAgingTimeout:
case DHCPOptionEnum.ARPCacheTimeout:
case DHCPOptionEnum.TCPKeepaliveInterval:
case DHCPOptionEnum.IPAddressLeaseTime:
case DHCPOptionEnum.RenewalTimeValue_T1:
case DHCPOptionEnum.RebindingTimeValue_T2:
case DHCPOptionEnum.ClientLastTransactionTime:
if (options[opt] is string)
{
msg[opt] = BitConverter.GetBytes(uint.Parse((string)options[opt]));
}
else if (options[opt] is int || options[opt] is Int32 || options[opt] is Int16 || options[opt] is Int16 || options[opt] is Int64 || options[opt] is long || options[opt] is double || options[opt] is Double || options[opt] is decimal || options[opt] is Decimal || options[opt] is uint || options[opt] is UInt16 || options[opt] is UInt32 || options[opt] is UInt64 || options[opt] is ushort || options[opt] is ulong || options[opt] is float)
{
msg[opt] = BitConverter.GetBytes(uint.Parse(options[opt].ToString()));
}
break;
case DHCPOptionEnum.BootFileSize:
case DHCPOptionEnum.MaximumDatagramReAssemblySize:
case DHCPOptionEnum.InterfaceMTU:
case DHCPOptionEnum.MaximumDHCPMessageSize:
if (options[opt] is string)
{
msg[opt] = BitConverter.GetBytes(ushort.Parse((string)options[opt]));
}
else if (options[opt] is int || options[opt] is Int32 || options[opt] is Int16 || options[opt] is Int16 || options[opt] is Int64 || options[opt] is long || options[opt] is double || options[opt] is Double || options[opt] is decimal || options[opt] is Decimal || options[opt] is uint || options[opt] is UInt16 || options[opt] is UInt32 || options[opt] is UInt64 || options[opt] is ushort || options[opt] is ulong || options[opt] is float)
{
msg[opt] = BitConverter.GetBytes(ushort.Parse(options[opt].ToString()));
}
break;
case DHCPOptionEnum.PathMTUPlateauTable:
List <byte> tmtu = new List <byte>();
if (options[opt] is string)
{
string smtu = (string)options[opt];
if (smtu.Contains(","))
{
foreach (string str in smtu.Split(','))
{
if (str.Length > 0)
{
tmtu.AddRange(BitConverter.GetBytes(ushort.Parse(str)));
}
}
}
else if (smtu.Contains(" "))
{
foreach (string str in smtu.Split(' '))
{
if (str.Length > 0)
{
tmtu.AddRange(BitConverter.GetBytes(ushort.Parse(str)));
}
}
}
}
else if (options[opt] is ushort[] || options[opt] is List <ushort> )
{
foreach (ushort us in (options[opt] is ushort[] ? (ushort[])options[opt] : ((List <ushort>)options[opt]).ToArray()))
{
tmtu.AddRange(BitConverter.GetBytes(us));
}
}
msg[opt] = (tmtu.Count > 0 ? tmtu.ToArray() : null);
break;
default:
if (options[opt] is string)
{
msg[opt] = ASCIIEncoding.ASCII.GetBytes((string)options[opt]);
}
break;
}
if (msg[opt] == null)
{
throw new Exception("Unable to convert object " + options[opt].GetType().FullName + " for option " + opt.ToString());
}
else
{
Log(LogLevels.Trace, "Set option " + opt.ToString() + " for request");
}
}
}
msg[DHCPOptionEnum.ParameterRequestList] = null;
return(msg);
}
private void ProcessDecline(DHCPMessage msg)
{
_releaseIP(BytesToReadableMAC(msg.MAC).Replace(":", ""), msg.AssignedIP);
}
