public void SetDhcpV4ServerIdOption(DhcpV4ServerIdOption option)
{
if (option != null)
{
_dhcpServerIdOption = option;
}
}
public DhcpV4ServerIdOption GetDhcpV4ServerIdOption()
{
if (_dhcpServerIdOption == null)
{
if (_dhcpOptions != null)
{
_dhcpServerIdOption = (DhcpV4ServerIdOption)_dhcpOptions.Get(DhcpConstants.V4OPTION_SERVERID);
}
}
return(_dhcpServerIdOption);
}
/* (non-Javadoc)
* @see com.jagornet.dhcpv6.server.request.BaseDhcpProcessor#preProcess()
*/
public override bool PreProcess()
{
if (!base.PreProcess())
{
return(false);
}
DhcpV4ServerIdOption requestedServerIdOption = _requestMsg.GetDhcpV4ServerIdOption();
requestedIpAddrOption = (DhcpV4RequestedIpAddressOption)
_requestMsg.GetDhcpOption(DhcpConstants.V4OPTION_REQUESTED_IP);
// first determine what KIND of request we are dealing with
if (_requestMsg.GetCiAddr().Equals(DhcpConstants.ZEROADDR_V4))
{
// the ciAddr MUST be 0.0.0.0 for Init-Reboot and Selecting
if (requestedServerIdOption == null)
{
// init-reboot MUST NOT have server-id option
type = RequestType.Request_InitReboot;
}
else
{
// selecting MUST have server-id option
type = RequestType.Request_Selecting;
}
}
else
{
// the ciAddr MUST NOT be 0.0.0.0 for Renew and Rebind
if (_requestMsg.IsUnicast())
{
// renew is unicast
// NOTE: this will not happen if the v4 broadcast interface used at startup,
// but handling of DHCPv4 renew/rebind is the same anyway
type = RequestType.Request_Renewing;
}
else
{
// rebind is broadcast
type = RequestType.Request_Rebinding;
}
}
if ((type == RequestType.Request_InitReboot) || (type == RequestType.Request_Selecting))
{
if (requestedIpAddrOption == null)
{
log.Warn("Ignoring " + type + " message: " +
"Requested IP option is null");
return(false);
}
if (type == RequestType.Request_Selecting)
{
String requestedServerId = requestedServerIdOption.GetIpAddress();
string myServerId = _dhcpV4ServerIdOption.GetIpAddress();
if (!myServerId.Equals(requestedServerId))
{
log.Warn("Ignoring " + type + " message: " +
"Requested ServerId: " + requestedServerIdOption +
" My ServerId: " + _dhcpV4ServerIdOption);
return(false);
}
}
}
else
{ // type == Renewing or Rebinding
if (requestedIpAddrOption != null)
{
log.Warn("Ignoring " + type + " message: " +
"Requested IP option is not null");
return(false);
}
}
return(true);
}
