http://files.thecybershadow.net/dhcptest/
dhcptest is a simple DHCP client. You can find more information on the program's GitHub project page: https://github.com/CyberShadow/dhcptest
dhcptest v0.7 - Created by Vladimir Panteleev
https://github.com/CyberShadow/dhcptest
Run with --help for a list of command-line options.
Listening for DHCP replies on port 68.
Type "d" to broadcast a DHCP discover packet, or "help" for details.