tutorials/exercises/link_monitor/send.py at master · p4lang/tutorials · GitHub

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#!/usr/bin/env python3

# SPDX-FileCopyrightText: 2019 Stephen Ibanez
#
# SPDX-License-Identifier: GPL-2.0-only
import sys
import time

from probe_hdrs import *


def main():

    probe_pkt = Ether(dst='ff:ff:ff:ff:ff:ff', src=get_if_hwaddr('eth0')) / \
                Probe(hop_cnt=0) / \
                ProbeFwd(egress_spec=4) / \
                ProbeFwd(egress_spec=1) / \
                ProbeFwd(egress_spec=4) / \
                ProbeFwd(egress_spec=1) / \
                ProbeFwd(egress_spec=3) / \
                ProbeFwd(egress_spec=2) / \
                ProbeFwd(egress_spec=3) / \
                ProbeFwd(egress_spec=2) / \
                ProbeFwd(egress_spec=1)

    while True:
        try:
            sendp(probe_pkt, iface='eth0')
            time.sleep(1)
        except KeyboardInterrupt:
            sys.exit()

if __name__ == '__main__':
    main()