/usr/lib/python3/dist-packages/glances/plugins/glances_network.py is in glances 2.1.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# This file is part of Glances.
#
# Copyright (C) 2014 Nicolargo <nicolas@nicolargo.com>
#
# Glances is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Glances 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Network plugin."""
import base64
from glances.core.glances_timer import getTimeSinceLastUpdate
from glances.plugins.glances_plugin import GlancesPlugin
import psutil
# SNMP OID
# http://www.net-snmp.org/docs/mibs/interfaces.html
# Dict key = interface_name
snmp_oid = {'default': {'interface_name': '1.3.6.1.2.1.2.2.1.2',
'cumulative_rx': '1.3.6.1.2.1.2.2.1.10',
'cumulative_tx': '1.3.6.1.2.1.2.2.1.16'}}
class Plugin(GlancesPlugin):
"""Glances' network Plugin.
stats is a list
"""
def __init__(self, args=None):
"""Init the plugin."""
GlancesPlugin.__init__(self, args=args)
# We want to display the stat in the curse interface
self.display_curse = True
# Init the stats
self.reset()
def reset(self):
"""Reset/init the stats."""
self.stats = []
def update(self):
"""Update network stats using the input method.
Stats is a list of dict (one dict per interface)
"""
# Reset stats
self.reset()
if self.get_input() == 'local':
# Update stats using the standard system lib
# Grab network interface stat using the PsUtil net_io_counter method
try:
netiocounters = psutil.net_io_counters(pernic=True)
except UnicodeDecodeError:
return self.stats
# Previous network interface stats are stored in the network_old variable
if not hasattr(self, 'network_old'):
# First call, we init the network_old var
try:
self.network_old = netiocounters
except (IOError, UnboundLocalError):
pass
else:
# By storing time data we enable Rx/s and Tx/s calculations in the
# XML/RPC API, which would otherwise be overly difficult work
# for users of the API
time_since_update = getTimeSinceLastUpdate('net')
# Loop over interfaces
network_new = netiocounters
for net in network_new:
try:
# Try necessary to manage dynamic network interface
netstat = {}
netstat['interface_name'] = net
netstat['time_since_update'] = time_since_update
netstat['cumulative_rx'] = network_new[net].bytes_recv
netstat['rx'] = (network_new[net].bytes_recv -
self.network_old[net].bytes_recv)
netstat['cumulative_tx'] = network_new[net].bytes_sent
netstat['tx'] = (network_new[net].bytes_sent -
self.network_old[net].bytes_sent)
netstat['cumulative_cx'] = (netstat['cumulative_rx'] +
netstat['cumulative_tx'])
netstat['cx'] = netstat['rx'] + netstat['tx']
except KeyError:
continue
else:
self.stats.append(netstat)
# Save stats to compute next bitrate
self.network_old = network_new
elif self.get_input() == 'snmp':
# Update stats using SNMP
# SNMP bulk command to get all network interface in one shot
try:
netiocounters = self.set_stats_snmp(snmp_oid=snmp_oid[self.get_short_system_name()],
bulk=True)
except KeyError:
netiocounters = self.set_stats_snmp(snmp_oid=snmp_oid['default'],
bulk=True)
# Previous network interface stats are stored in the network_old variable
if not hasattr(self, 'network_old'):
# First call, we init the network_old var
try:
self.network_old = netiocounters
except (IOError, UnboundLocalError):
pass
else:
# See description in the 'local' block
time_since_update = getTimeSinceLastUpdate('net')
# Loop over interfaces
network_new = netiocounters
for net in network_new:
try:
# Try necessary to manage dynamic network interface
netstat = {}
# Windows: a tips is needed to convert HEX to TXT
# http://blogs.technet.com/b/networking/archive/2009/12/18/how-to-query-the-list-of-network-interfaces-using-snmp-via-the-ifdescr-counter.aspx
if self.get_short_system_name() == 'windows':
try:
netstat['interface_name'] = str(base64.b16decode(net[2:-2].upper()))
except TypeError:
netstat['interface_name'] = net
else:
netstat['interface_name'] = net
netstat['time_since_update'] = time_since_update
netstat['cumulative_rx'] = float(network_new[net]['cumulative_rx'])
netstat['rx'] = (float(network_new[net]['cumulative_rx']) -
float(self.network_old[net]['cumulative_rx']))
netstat['cumulative_tx'] = float(network_new[net]['cumulative_tx'])
netstat['tx'] = (float(network_new[net]['cumulative_tx']) -
float(self.network_old[net]['cumulative_tx']))
netstat['cumulative_cx'] = (netstat['cumulative_rx'] +
netstat['cumulative_tx'])
netstat['cx'] = netstat['rx'] + netstat['tx']
except KeyError:
continue
else:
self.stats.append(netstat)
# Save stats to compute next bitrate
self.network_old = network_new
return self.stats
def msg_curse(self, args=None, max_width=None):
"""Return the dict to display in the curse interface."""
# Init the return message
ret = []
# Only process if stats exist and display plugin enable...
if self.stats == [] or args.disable_network:
return ret
# Max size for the interface name
if max_width is not None and max_width >= 23:
# Interface size name = max_width - space for interfaces bitrate
ifname_max_width = max_width - 14
else:
ifname_max_width = 9
# Build the string message
# Header
msg = '{0:{width}}'.format(_("NETWORK"), width=ifname_max_width)
ret.append(self.curse_add_line(msg, "TITLE"))
if args.network_cumul:
# Cumulative stats
if args.network_sum:
# Sum stats
msg = '{0:>14}'.format(_("Rx+Tx"))
ret.append(self.curse_add_line(msg))
else:
# Rx/Tx stats
msg = '{0:>7}'.format(_("Rx"))
ret.append(self.curse_add_line(msg))
msg = '{0:>7}'.format(_("Tx"))
ret.append(self.curse_add_line(msg))
else:
# Bitrate stats
if args.network_sum:
# Sum stats
msg = '{0:>14}'.format(_("Rx+Tx/s"))
ret.append(self.curse_add_line(msg))
else:
msg = '{0:>7}'.format(_("Rx/s"))
ret.append(self.curse_add_line(msg))
msg = '{0:>7}'.format(_("Tx/s"))
ret.append(self.curse_add_line(msg))
# Interface list (sorted by name)
for i in sorted(self.stats, key=lambda network: network['interface_name']):
# Do not display hidden interfaces
if self.is_hide(i['interface_name']):
continue
# Format stats
# Is there an alias for the interface name ?
ifname = self.has_alias(i['interface_name'])
if ifname is None:
ifname = i['interface_name'].split(':')[0]
if len(ifname) > ifname_max_width:
# Cut interface name if it is too long
ifname = '_' + ifname[-ifname_max_width+1:]
if args.byte:
# Bytes per second (for dummy)
if args.network_cumul:
rx = self.auto_unit(int(i['cumulative_rx']))
tx = self.auto_unit(int(i['cumulative_tx']))
sx = self.auto_unit(int(i['cumulative_tx'])
+ int(i['cumulative_tx']))
else:
rx = self.auto_unit(int(i['rx'] // i['time_since_update']))
tx = self.auto_unit(int(i['tx'] // i['time_since_update']))
sx = self.auto_unit(int(i['rx'] // i['time_since_update'])
+ int(i['tx'] // i['time_since_update']))
else:
# Bits per second (for real network administrator | Default)
if args.network_cumul:
rx = self.auto_unit(int(i['cumulative_rx'] * 8)) + "b"
tx = self.auto_unit(int(i['cumulative_tx'] * 8)) + "b"
sx = self.auto_unit(int(i['cumulative_rx'] * 8)
+ int(i['cumulative_tx'] * 8)) + "b"
else:
rx = self.auto_unit(int(i['rx'] // i['time_since_update'] * 8)) + "b"
tx = self.auto_unit(int(i['tx'] // i['time_since_update'] * 8)) + "b"
sx = self.auto_unit(int(i['rx'] // i['time_since_update'] * 8) +
int(i['tx'] // i['time_since_update'] * 8)) + "b"
# New line
ret.append(self.curse_new_line())
msg = '{0:{width}}'.format(ifname, width=ifname_max_width)
ret.append(self.curse_add_line(msg))
if args.network_sum:
msg = '{0:>14}'.format(sx)
ret.append(self.curse_add_line(msg))
else:
msg = '{0:>7}'.format(rx)
ret.append(self.curse_add_line(
msg, self.get_alert(int(i['rx'] // i['time_since_update'] * 8),
header=ifname + '_rx')))
msg = '{0:>7}'.format(tx)
ret.append(self.curse_add_line(
msg, self.get_alert(int(i['tx'] // i['time_since_update'] * 8),
header=ifname + '_tx')))
return ret
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