dhcpcd is an implementation of the DHCP client specified in
draft-ietf-dhc-dhcp-09 (when -r option is not speci- fied) and RFC1541
(when -r option is specified).
It gets the host information (IP address, netmask, broad- cast address,
etc.) from a DHCP server and configures the network interface of the
machine on which it is running. It also tries to renew the lease time
according to RFC1541 or draft-ietf-dhc-dhcp-09.