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DhcpServer: added support to shift an allocation from dynamic to another reserved lease address and vice versa.

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This commit is contained in:
Shreyas Zare
2020-10-04 14:35:16 +05:30
parent ad74afa91e
commit d7f4719fd0
1 changed files with 20 additions and 0 deletions
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20
DnsServerCore/Dhcp/DhcpServer.cs
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@@ -347,6 +347,26 @@ namespace DnsServerCore.Dhcp
//send nak
return new DhcpMessage(request, IPAddress.Any, IPAddress.Any, new DhcpOption[] { new DhcpMessageTypeOption(DhcpMessageType.Nak), new ServerIdentifierOption(scope.InterfaceAddress), DhcpOption.CreateEndOption() });
}
Lease reservedLease = scope.GetReservedLease(request);
if (reservedLease == null)
{
if (leaseOffer.Type == LeaseType.Reserved)
{
//client's reserved has been removed so release the current lease and send NAK to allow it to get new allocation
scope.ReleaseLease(leaseOffer);
return new DhcpMessage(request, IPAddress.Any, IPAddress.Any, new DhcpOption[] { new DhcpMessageTypeOption(DhcpMessageType.Nak), new ServerIdentifierOption(scope.InterfaceAddress), DhcpOption.CreateEndOption() });
}
}
else
{
if (!reservedLease.Address.Equals(leaseOffer.Address))
{
//client has a new reserved lease so release the current lease and send NAK to allow it to get new allocation
scope.ReleaseLease(leaseOffer);
return new DhcpMessage(request, IPAddress.Any, IPAddress.Any, new DhcpOption[] { new DhcpMessageTypeOption(DhcpMessageType.Nak), new ServerIdentifierOption(scope.InterfaceAddress), DhcpOption.CreateEndOption() });
}
}
}
else
{