VILLASnode/etc/loopback.conf

/** This is an example for a minimal loopback configuration.
 *
 * All messages will be sent back to the origin using UDP packets.
 *
 * You can use this configuration in conjunction with the 'send', 'receive' and 'random'
 * utilities as shown below (run all three steps in parallel).
 *
 * 0. Overview:
 *
 *    villas signal --PIPE--> ./pipe  --UDP--> ./node --UDP--> ./pipe
 *
 * 1. Start server:
 *
 *    $ villas node etc/loopback.conf
 *
 * 2. Send random data to server:
 *
 *    $ villas signal random -r 10 -v 4 | villas pipe etc/loopback.conf node1
 *
 * 3. Receive data from server:
 *
 *    $ villas pipe etc/loopback.conf node2
 *
 * The syntax of this file is similar to JSON.
 * A detailed description of the format can be found here:
 *   http://www.hyperrealm.com/libconfig/libconfig_manual.html#Configuration-Files
 *
 * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
 * @copyright 2014-2020, Institute for Automation of Complex Power Systems, EONERC
 * @license GNU General Public License (version 3)
 *
 * VILLASnode
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *********************************************************************************/

nodes = {
	node1 = {
		type = "socket"
		layer = "udp"

		in = {
			address = "127.0.0.1:12000"			# Local ip:port, use '*' for random port
		}
		out = {
			address = "127.0.0.1:12001"

			netem = {
				enabled = false
				delay = 1000000		# In micro seconds!
				jitter = 300000
				distribution = "normal"
			}
		}
	},
	node2 = {
		type = "socket"
		layer = "udp"
		in = {
			address = "127.0.0.1:12001"			# Local ip:port, use '*' for random port
		}
		out = {
			address = "127.0.0.1:12002"
		}
	},
	node3 = {
		type = "socket"
		layer = "udp"
		in = {
			address = "127.0.0.1:12002"			# Local ip:port, use '*' for random port
		}
		out = {
			address = "127.0.0.1:12000"
		}
	},
	loopback = {
		type = "socket"
		layer = "udp"
		in = {
			address = "127.0.0.1:12003"			# Local ip:port, use '*' for random port
		}
		out = {
			address = "127.0.0.1:12003"
		}
	}
}

paths = (
	{
		in = "node1"				# Name of the node we listen to (see above)
		out = "node2"				# And we loop back to the origin
		
		hooks = (
			{
				type = "print"
			}
		)
	}
)