A basic DHCP client

I am coding a very simple DHCP client in C. I have trouble deciding whether it should use UDP or TCP, what basic commands should it support. I think it should be able to get at least DNS, SMTP, POP3 server information from server.

What else do I need to know? Is there a basic DHCP C implementation available which 开发者_如何学Pythoncan help?

You shouldn't have trouble "deciding" whether to use TCP or UDP, you should rely on the actual DHCP spec to determine what protocol is used. In fact, reliance on that spec will be more or less critical to implementing a DHCP client that does what it's supposed to do... since "what it's supposed to do" is defined in the spec.