DHCP Porting
Do you have experience in coding VxWorks? Experience with C?
Do you use a cross compiler toolchain (apparently you're working on windows)?
Why don't you use the dhcpd being delivered with VxWorks or an existing dhcpd port?
A dhcpd works on an OS-dependent layer, therefore porting it might not be an easy task. If you already stumble on some different data structures that way I'm afraid you wont get it done successfully.
Dhcp porting