DHCP Server Callout API Reference

The DHCP Server API is a collection of functions that can be implemented by a third-party DLL. The first function in a third-party DLL that must be implemented is the following:

• DhcpServerCalloutEntry

Developers of a third-party DLL designed to take advantage of the DHCP Server API use the DhcpServerCalloutEntry function to register for notification of certain events. This is achieved through filling out a structure with pointers to corresponding functions implemented in their third-party DLL. The structure that is passed to Microsoft DHCP Server as part of the DhcpServerCalloutEntry function is the following:

• DHCP_CALLOUT_TABLE

Third-party DLLs register notification requests by filling corresponding members of DHCP_CALLOUT_TABLE with entry points to corresponding functions implemented in their third-party DLL. If a third-party DLL does not require notification for a given event, that member of DHCP_CALLOUT_TABLE can be set to NULL, and the corresponding DHCP Server API function need not be implemented.

The list of DHCP Server API functions that can be implemented by a third-party DLL, and therefore, the events in Microsoft DHCP Server that can trigger an event notification and corresponding function call, are the following:

• DhcpAddressDelHook
• DhcpAddressOfferHook
• DhcpControlHook
• DhcpDeleteClientHook
• DhcpHandleOptionsHook
• DhcpNewPktHook
• DhcpPktDropHook
• DhcpPktSendHook