DC (Direct Connect) and ADC (Advanced Direct Connect) are both Communications protocols.
Here you find HowTos to help you install and configure them on OpenWrt:
opendchub is a Unix/Linux version of the hub software for the Direct Connect network written in Cuhub is a high performance peer-to-peer hub for the ADC network written in C published under the GPLv3 with IPv6 support Unless the maintainers provide precompiled binaries (compiled against uCLibC for the Instruction set of your device), you need to crosscompile the sources yourself:
...
opkg update
opkg install opendchub
opendchub
and answer the questions. The default port is 411
opendchub -h
/root/.opendchub/config and set hub_hostname to the hostname of your routeropendchub -d
opendchub
/etc/rc.local to start opendchub when the router boots.