private static void V4Request()
{
var V4Message = new DhcpV4Message(IPAddress.Any,
new IPEndPoint(IPAddress.Parse("192.168.61.48"), DhcpConstants.V4_SERVER_PORT));
V4Message.SetOp((short)DhcpConstants.V4_OP_REQUEST); //V4_OP_REQUEST
V4Message.SetGiAddr(IPAddress.Any);
V4Message.SetChAddr(PhysicalAddress.Parse("9C-EB-E8-28-92-D4").GetAddressBytes());
DhcpV4MsgTypeOption msgTypeOption = new DhcpV4MsgTypeOption();
msgTypeOption.SetUnsignedByte((short)DhcpConstants.V4MESSAGE_TYPE_REQUEST);
V4Message.PutDhcpOption(msgTypeOption);
V4Message.PutDhcpOption(new DhcpV4RequestedIpAddressOption(
new v4RequestedIpAddressOption()
{
code = DhcpConstants.V4OPTION_REQUESTED_IP,
ipAddress = "192.168.61.140"
}));
V4Message.SetDhcpV4ServerIdOption(
new DhcpV4ServerIdOption(
new v4ServerIdOption()
{
code = DhcpConstants.V4OPTION_SERVERID,
ipAddress = "192.168.61.48"
}));
var message = DhcpV4MessageHandler.HandleMessage(
IPAddress.Parse("192.168.61.48"), V4Message);
Console.WriteLine(message.ToString());
}
//Populate v4 options.
//@param link the link
//@param configObj the config object or null if none
protected void PopulateV4Reply(DhcpLink dhcpLink, DhcpV4OptionConfigObject configObj)
{
string sname = DhcpServerPolicies.EffectivePolicy(_requestMsg, configObj,
dhcpLink.GetLink(), Property.V4_HEADER_SNAME);
if (!String.IsNullOrEmpty(sname))
{
_replyMsg.SetsName(sname);
}
string filename = DhcpServerPolicies.EffectivePolicy(_requestMsg, configObj,
dhcpLink.GetLink(), Property.V4_HEADER_FILENAME);
if (!String.IsNullOrEmpty(filename))
{
_replyMsg.SetFile(filename);
}
Dictionary <int, DhcpOption> optionMap =
_dhcpServerConfig.EffectiveV4AddrOptions(_requestMsg, dhcpLink, configObj);
if (DhcpServerPolicies.EffectivePolicyAsBoolean(configObj,
dhcpLink.GetLink(), Property.SEND_REQUESTED_OPTIONS_ONLY))
{
optionMap = RequestedOptions(optionMap, _requestMsg);
}
_replyMsg.PutAllDhcpOptions(optionMap);
// copy the relay agent info option from request to reply
// in order to echo option back to router as required
if (_requestMsg.HasOption(DhcpConstants.V4OPTION_RELAY_INFO))
{
_requestMsg.PutDhcpOption(_requestMsg.GetDhcpOption(DhcpConstants.V4OPTION_RELAY_INFO));
}
}
private DhcpV4Message BuildRequestMessage(DhcpV4Message offer)
{
DhcpV4Message msg = new DhcpV4Message(IPAddress.Parse("0.0.0.0"), new IPEndPoint(serverAddr, serverPort));
msg.SetOp((short)DhcpConstants.V4_OP_REQUEST);
msg.SetTransactionId(offer.GetTransactionId());
msg.SetHtype((short)1); // ethernet
msg.SetHlen((byte)6);
msg.SetChAddr(offer.GetChAddr());
msg.SetGiAddr(clientAddr); // look like a relay to the DHCP server
DhcpV4MsgTypeOption msgTypeOption = new DhcpV4MsgTypeOption();
msgTypeOption.SetUnsignedByte((short)DhcpConstants.V4MESSAGE_TYPE_REQUEST);
msg.PutDhcpOption(msgTypeOption);
DhcpV4RequestedIpAddressOption reqIpOption = new DhcpV4RequestedIpAddressOption();
reqIpOption.SetIpAddress(offer.GetYiAddr().ToString());
msg.PutDhcpOption(reqIpOption);
return(msg);
}
//Process the client request. Find appropriate configuration based on any
//criteria in the request message that can be matched against the server's
//configuration, then formulate a response message containing the options
//to be sent to the client.
//@return a Reply DhcpMessage
public DhcpV4Message ProcessMessage(IPAddress localAddress)
{
Monitor.Enter(_lock);
try
{
//設定ServerId為管理IP
_dhcpV4ServerIdOption.SetIpAddress(localAddress.ToString());
if (!PreProcess())
{
return(null);
}
// build a reply message using the local and remote sockets from the request
_replyMsg = new DhcpV4Message(_requestMsg.GetLocalAddress(), _requestMsg.GetRemoteAddress());
_replyMsg.SetOp(DhcpConstants.V4_OP_REPLY);
// copy fields from request to reply
_replyMsg.SetHtype(_requestMsg.GetHtype());
_replyMsg.SetHlen(_requestMsg.GetHlen());
_replyMsg.SetTransactionId(_requestMsg.GetTransactionId());
_replyMsg.SetFlags(_requestMsg.GetFlags());
_replyMsg.SetGiAddr(_requestMsg.GetGiAddr());
_replyMsg.SetChAddr(_requestMsg.GetChAddr());
// MUST put Server Identifier in REPLY message
_replyMsg.PutDhcpOption(_dhcpV4ServerIdOption);
if (!Process())
{
log.Warn("Message dropped by processor");
return(null);
}
}
catch (Exception ex)
{
log.WarnFormat("BaseDhcpV4Processor ProcessMessage Faile. exMessage:{0} exStackTrace:{1}", ex.Message, ex.StackTrace);
return(null);
}
finally
{
if (!PostProcess())
{
log.Warn("Message dropped by postProcess");
_replyMsg = null;
}
Monitor.Exit(_lock);
}
return(_replyMsg);
}
/**
* Builds the discover message.
*
* @return the dhcp message
*/
private DhcpV4Message BuildDiscoverMessage(byte[] chAddr)
{
DhcpV4Message msg = new DhcpV4Message(IPAddress.Parse("0.0.0.0"), new IPEndPoint(serverAddr, serverPort));
msg.SetOp((short)DhcpConstants.V4_OP_REQUEST);
msg.SetTransactionId(GetRandomLong());
msg.SetHtype((short)1); // ethernet
msg.SetHlen((byte)6);
msg.SetChAddr(chAddr);
msg.SetGiAddr(clientAddr); // look like a relay to the DHCP server
DhcpV4MsgTypeOption msgTypeOption = new DhcpV4MsgTypeOption();
msgTypeOption.SetUnsignedByte((short)DhcpConstants.V4MESSAGE_TYPE_DISCOVER);
msg.PutDhcpOption(msgTypeOption);
return(msg);
}
private DhcpV4Message BuildReleaseMessage(DhcpV4Message ack)
{
DhcpV4Message msg = new DhcpV4Message(null, new IPEndPoint(serverAddr, serverPort));
msg.SetOp((short)DhcpConstants.V4_OP_REQUEST);
msg.SetTransactionId(ack.GetTransactionId());
msg.SetHtype((short)1); // ethernet
msg.SetHlen((byte)6);
msg.SetChAddr(ack.GetChAddr());
msg.SetGiAddr(clientAddr); // look like a relay to the DHCP server
msg.SetCiAddr(ack.GetYiAddr());
DhcpV4MsgTypeOption msgTypeOption = new DhcpV4MsgTypeOption();
msgTypeOption.SetUnsignedByte((short)DhcpConstants.V4MESSAGE_TYPE_RELEASE);
msg.PutDhcpOption(msgTypeOption);
return(msg);
}
/**
* Adds the v4 binding to reply.
*
* @param clientLink the client link
* @param binding the binding
*/
protected void AddBindingToReply(DhcpLink clientLink, Binding binding)
{
HashSet <BindingObject> bindingObjs = binding.GetBindingObjects();
if ((bindingObjs != null) && bindingObjs.Count > 0)
{
if (bindingObjs.Count == 1)
{
BindingObject bindingObj = bindingObjs.First();
IPAddress inetAddr = bindingObj.GetIpAddress();
if (inetAddr != null)
{
_replyMsg.SetYiAddr(inetAddr);
// must be an DhcpV4OptionConfigObject for v4 binding
DhcpV4OptionConfigObject configObj =
(DhcpV4OptionConfigObject)bindingObj.GetConfigObj();
if (configObj != null)
{
long preferred = configObj.GetPreferredLifetime();
DhcpV4LeaseTimeOption dhcpV4LeaseTimeOption = new DhcpV4LeaseTimeOption();
dhcpV4LeaseTimeOption.SetUnsignedInt(preferred);
_replyMsg.PutDhcpOption(dhcpV4LeaseTimeOption);
PopulateV4Reply(clientLink, configObj);
//TODO when do actually start the timer? currently, two get
// created - one during advertise, one during reply
// policy to allow real-time expiration?
// bp.startExpireTimerTask(bindingAddr, iaAddrOption.getValidLifetime());
}
else
{
log.Error("Null binding pool in binding: " + binding.ToString());
}
}
else
{
log.Error("Null address in binding: " + binding.ToString());
}
}
else
{
log.Error("Expected only one bindingObject in v4 Binding, but found " +
bindingObjs.Count + "bindingObjects");
}
}
else
{
log.Error("No V4 bindings in binding object!");
}
}
private static void V4Discover()
{
var V4Message = new DhcpV4Message(IPAddress.Any,
new IPEndPoint(IPAddress.Parse("192.168.61.48"), DhcpConstants.V4_SERVER_PORT));
V4Message.SetOp((short)DhcpConstants.V4_OP_REQUEST); //V4_OP_REQUEST
V4Message.SetGiAddr(IPAddress.Any);
V4Message.SetChAddr(PhysicalAddress.Parse("9C-EB-E8-28-92-D4").GetAddressBytes());
V4Message.SetHlen(6);
V4Message.SetHtype((byte)6);
V4Message.SetTransactionId(-1729018559);
DhcpV4MsgTypeOption msgTypeOption = new DhcpV4MsgTypeOption();
msgTypeOption.SetUnsignedByte((short)DhcpConstants.V4MESSAGE_TYPE_DISCOVER);
V4Message.PutDhcpOption(msgTypeOption);
var message = DhcpV4MessageHandler.HandleMessage(
IPAddress.Parse("192.168.61.48"), V4Message);
Console.WriteLine(message.ToString());
}
