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igmp-proxy.py
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igmp-proxy.py
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#!/usr/bin/env python3
#
# Copyright (C) 2023 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# 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/>.
# File: show_igmpproxy.py
# Purpose:
# Display istatistics from IPv4 IGMP proxy.
# Used by the "run show ip multicast" command tree.
import ipaddress
import json
import socket
import sys
import tabulate
import vyos.config
import vyos.opmode
from vyos.utils.convert import bytes_to_human
from vyos.utils.io import print_error
from vyos.utils.process import process_named_running
def _is_configured():
"""Check if IGMP proxy is configured"""
return vyos.config.Config().exists_effective('protocols igmp-proxy')
def _kernel_to_ip(addr):
"""
Convert any given address from Linux kernel to a proper, IPv4 address
using the correct host byte order.
"""
# Convert from hex 'FE000A0A' to decimal '4261415434'
addr = int(addr, 16)
# Kernel ABI _always_ uses network byte order.
addr = socket.ntohl(addr)
return str(ipaddress.IPv4Address(addr))
def _process_mr_vif():
"""Read rows from /proc/net/ip_mr_vif into dicts."""
result = []
with open('/proc/net/ip_mr_vif', 'r') as f:
next(f)
for line in f:
result.append({
'Interface': line.split()[1],
'PktsIn' : int(line.split()[3]),
'PktsOut' : int(line.split()[5]),
'BytesIn' : int(line.split()[2]),
'BytesOut' : int(line.split()[4]),
'Local' : _kernel_to_ip(line.split()[7]),
})
return result
def show_interface(raw: bool):
if data := _process_mr_vif():
if raw:
# Make the interface name the key for each row.
table = {}
for v in data:
table[v.pop('Interface')] = v
return json.loads(json.dumps(table))
# Make byte values human-readable for the table.
arr = []
for x in data:
arr.append({k: bytes_to_human(v) if k.startswith('Bytes') \
else v for k, v in x.items()})
return tabulate.tabulate(arr, headers='keys')
if not _is_configured():
print_error('IGMP proxy is not configured.')
sys.exit(0)
if not process_named_running('igmpproxy'):
print_error('IGMP proxy is not running.')
sys.exit(0)
if __name__ == "__main__":
try:
res = vyos.opmode.run(sys.modules[__name__])
if res:
print(res)
except (ValueError, vyos.opmode.Error) as e:
print_error(e)
sys.exit(1)

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igmp-proxy.py (3 KB)

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