public DhcpReleaseMessage(DhcpMessage accept)
{
// Create DHCP RELEASE message
mac = accept.mac;
AddOption(EOption.eMessageType, new byte[] { (byte)EMessageType.eRelease });
AddOption(EOption.eServerIdentifier, accept.serverId.GetAddressBytes());
iFlags[0] = 0x00; // clear BROADCAST bit
}
public DhcpRenewMessage(DhcpMessage lease)
{
// RENEW message is a REQUEST message without server ID or requested address
// and completed ciaddr
mac = lease.mac;
secs = 0;
ciaddr = lease.yiaddr;
xid = lease.xid;
AddOption(EOption.eMessageType, new byte[] { (byte)EMessageType.eRequest });
iFlags[0] = 0x00; // clear BROADCAST bit
}
private int SendMessage(DhcpMessage aMessage, string aDestination)
{
int bytesSent = 0;
iLog.Info("Tx " + aMessage.messageType.ToString() + " from " + aMessage.mac + " with XID " + aMessage.xidStr);
try
{
IPEndPoint server = new IPEndPoint(IPAddress.Parse(aDestination), 67);
bytesSent = iUdpClient.Send(aMessage.message, aMessage.message.Length, server);
}
catch (Exception e)
{
iLog.Fail(e.ToString());
}
return(bytesSent);
}
public DhcpRequestMessage(DhcpMessage offer)
{
// Create DHCP REQUEST message (caller can modify defaults before sending if required)
// defaults are set to mimic the message from a DS
mac = offer.mac;
secs = offer.secs;
xid = offer.xid;
AddOption(EOption.eMessageType, new byte[] { (byte)EMessageType.eRequest });
AddOption(EOption.eServerIdentifier, offer.serverId.GetAddressBytes());
AddOption(EOption.eRequestedAddress, offer.yiaddr.GetAddressBytes());
AddOption(EOption.eLeaseTime, offer.leaseTimeBytes);
AddOption(EOption.eParameterList, new byte[] { (byte)EOption.eSubnetMask,
(byte)EOption.eRouter,
(byte)EOption.eDomainNameServer,
(byte)EOption.eHostName,
(byte)EOption.eDomainName });
}