private void DhcpRequest(DhcpMessage message)
{
Byte[] addressRequestData = message.GetOptionData(DhcpOption.AddressRequest);
if (addressRequestData == null)
{
addressRequestData = message.ClientAddress;
}
InternetAddress addressRequest = new InternetAddress(addressRequestData);
if (addressRequest.IsEmpty)
{
this.SendNak(message);
return;
}
// Assume we're on an ethernet network
Byte[] hardwareAddressData = new Byte[6];
Array.Copy(message.ClientHardwareAddress, hardwareAddressData, 6);
PhysicalAddress clientHardwareAddress = new PhysicalAddress(hardwareAddressData);
AddressLease assignment = null;
Boolean ack = false;
// If this client is explicitly allowed, or they are not denied and the allow any flag is set
if (this.m_Acl.ContainsKey(clientHardwareAddress) && this.m_Acl[clientHardwareAddress] ||
!this.m_Acl.ContainsKey(clientHardwareAddress) && this.m_AllowAny)
{
if (this.m_Reservations.ContainsKey(clientHardwareAddress))
{
assignment = new AddressLease(clientHardwareAddress, this.m_Reservations[clientHardwareAddress], DateTime.Now.Add(this.m_LeaseDuration));
if (addressRequest.Equals(assignment.Address))
{
ack = true;
}
}
else
{
lock (this.m_LeaseSync)
{
if (this.m_ActiveLeases.ContainsKey(addressRequest) &&
(this.m_ActiveLeases[addressRequest].Owner.Equals(clientHardwareAddress) || this.m_ActiveLeases[addressRequest].SessionId == message.SessionId))
{
assignment = this.m_ActiveLeases[addressRequest];
assignment.Acknowledged = true;
assignment.Owner = clientHardwareAddress;
assignment.Expiration = DateTime.Now.Add(this.m_LeaseDuration);
ack = true;
}
}
}
}
if (ack)
{
this.SendAck(message, assignment);
}
else
{
this.SendNak(message);
}
}
private void DhcpDiscover(DhcpMessage message)
{
Byte[] addressRequestData = message.GetOptionData(DhcpOption.AddressRequest);
if (addressRequestData == null)
{
addressRequestData = message.ClientAddress;
}
InternetAddress addressRequest = new InternetAddress(addressRequestData);
// Assume we're on an ethernet network
Byte[] hardwareAddressData = new Byte[6];
Array.Copy(message.ClientHardwareAddress, hardwareAddressData, 6);
PhysicalAddress clientHardwareAddress = new PhysicalAddress(hardwareAddressData);
AddressLease offer = null;
// If this client is explicitly allowed, or they are not denied and the allow any flag is set
if (this.m_Acl.ContainsKey(clientHardwareAddress) && this.m_Acl[clientHardwareAddress] ||
!this.m_Acl.ContainsKey(clientHardwareAddress) && this.m_AllowAny)
{
if (this.m_Reservations.ContainsKey(clientHardwareAddress))
{
offer = new AddressLease(clientHardwareAddress, this.m_Reservations[clientHardwareAddress], DateTime.Now.Add(this.m_LeaseDuration));
}
else
{
lock (this.m_LeaseSync)
{
if (!addressRequest.Equals(InternetAddress.Empty))
{
if (this.m_InactiveLeases.ContainsKey(addressRequest))
{
offer = this.m_InactiveLeases[addressRequest];
this.m_InactiveLeases.Remove(addressRequest);
this.m_ActiveLeases.Add(addressRequest, offer);
}
else if (this.m_ActiveLeases.ContainsKey(addressRequest) && this.m_ActiveLeases[addressRequest].Owner.Equals(clientHardwareAddress))
{
offer = this.m_ActiveLeases[addressRequest];
}
}
else if (this.m_InactiveLeases.Count > 0)
{
offer = this.m_InactiveLeases.Values[0];
this.m_InactiveLeases.Remove(offer.Address);
this.m_ActiveLeases.Add(offer.Address, offer);
}
}
}
}
if (offer == null)
{
this.SendNak(message);
}
else
{
offer.Acknowledged = false;
offer.Expiration = DateTime.Now.Add(this.m_OfferTimeout);
offer.SessionId = message.SessionId;
offer.Owner = clientHardwareAddress;
this.SendOffer(message, offer);
}
}
