internal DHCPv4Packet HandleDecline(DHCPv4Packet packet)
{
DHCPv4ScopeAddressProperties addressProperties = GetAddressProperties();
if (addressProperties.AcceptDecline == false)
{
base.Apply(new DHCPv4DeclineHandledEvent(this.Id, packet, DHCPv4DeclineHandledEvent.DeclineErros.DeclineNotAllowed));
return(DHCPv4Packet.Empty);
}
IPv4Address address = packet.GetRequestedAddressFromRequestedOption();
if (address == IPv4Address.Empty)
{
base.Apply(new DHCPv4DeclineHandledEvent(this.Id, packet, DHCPv4DeclineHandledEvent.DeclineErros.IPAddressNotFound));
return(DHCPv4Packet.Empty);
}
DHCPv4Lease lease = Leases.GetLeaseByAddress(address);
if (lease == DHCPv4Lease.Empty)
{
base.Apply(new DHCPv4DeclineHandledEvent(this.Id, packet, DHCPv4DeclineHandledEvent.DeclineErros.LeaseNotFound));
return(DHCPv4Packet.Empty);
}
if (lease.State == LeaseStates.Suspended)
{
base.Apply(new DHCPv4DeclineHandledEvent(this.Id, packet, DHCPv4DeclineHandledEvent.DeclineErros.AddressAlreadySuspended));
return(DHCPv4Packet.Empty);
}
if (lease.IsPending() == false && lease.IsActive() == false)
{
base.Apply(new DHCPv4DeclineHandledEvent(this.Id, packet, DHCPv4DeclineHandledEvent.DeclineErros.LeaseInInvalidState));
return(DHCPv4Packet.Empty);
}
lease.Suspend(null);
base.Apply(new DHCPv4DeclineHandledEvent(this.Id, packet));
return(DHCPv4Packet.Empty);
}
internal DHCPv4Packet HandleRelease(DHCPv4Packet packet)
{
IPv4Address address = packet.Header.Source;
DHCPv4Lease lease = Leases.GetLeaseByAddress(address);
if (lease == DHCPv4Lease.Empty)
{
base.Apply(new DHCPv4ReleaseHandledEvent(this.Id, packet, DHCPv4ReleaseHandledEvent.ReleaseError.NoLeaseFound));
return(DHCPv4Packet.Empty);
}
if (lease.IsActive() == false)
{
base.Apply(new DHCPv4ReleaseHandledEvent(this.Id, packet, DHCPv4ReleaseHandledEvent.ReleaseError.LeaseNotActive));
return(DHCPv4Packet.Empty);
}
Leases.Release(lease);
base.Apply(new DHCPv4ReleaseHandledEvent(this.Id, packet));
return(DHCPv4Packet.Empty);
}