core-extra/daemon/examples/python/switch.py

import logging
import time

import params
from core.emulator.coreemu import CoreEmu
from core.emulator.emudata import IpPrefixes
from core.emulator.enumerations import EventTypes, NodeTypes


def example(args):
    # ip generator for example
    prefixes = IpPrefixes(ip4_prefix="10.83.0.0/16")

    # create emulator instance for creating sessions and utility methods
    coreemu = CoreEmu()
    session = coreemu.create_session()

    # must be in configuration state for nodes to start, when using "node_add" below
    session.set_state(EventTypes.CONFIGURATION_STATE)

    # create switch network node
    switch = session.add_node(_type=NodeTypes.SWITCH)

    # create nodes
    for _ in range(args.nodes):
        node = session.add_node()
        interface = prefixes.create_interface(node)
        session.add_link(node.id, switch.id, interface_one=interface)

    # instantiate session
    session.instantiate()

    # get nodes to run example
    first_node = session.get_node(2)
    last_node = session.get_node(args.nodes + 1)
    first_node_address = prefixes.ip4_address(first_node)
    logging.info("node %s pinging %s", last_node.name, first_node_address)
    output = last_node.cmd(f"ping -c {args.count} {first_node_address}")
    logging.info(output)

    # shutdown session
    coreemu.shutdown()


def main():
    logging.basicConfig(level=logging.INFO)
    args = params.parse("switch")
    start = time.perf_counter()
    logging.info(
        "running switch example: nodes(%s) ping count(%s)", args.nodes, args.count
    )
    example(args)
    logging.info("elapsed time: %s", time.perf_counter() - start)


if __name__ == "__main__":
    main()