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# -*- coding: utf-8 -*- |
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# |
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# This file is part of Glances. |
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# |
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# SPDX-FileCopyrightText: 2022 Nicolas Hennion <[email protected]> |
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# |
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# SPDX-License-Identifier: LGPL-3.0-only |
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# |
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"""Connections plugin.""" |
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from __future__ import unicode_literals |
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from glances.logger import logger |
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from glances.plugins.plugin.model import GlancesPluginModel |
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from glances.globals import nativestr |
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import psutil |
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# Define the history items list |
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# items_history_list = [{'name': 'rx', |
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# 'description': 'Download rate per second', |
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# 'y_unit': 'bit/s'}, |
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# {'name': 'tx', |
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# 'description': 'Upload rate per second', |
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# 'y_unit': 'bit/s'}] |
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class PluginModel(GlancesPluginModel): |
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"""Glances connections plugin. |
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stats is a dict |
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""" |
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status_list = [psutil.CONN_LISTEN, psutil.CONN_ESTABLISHED] |
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initiated_states = [psutil.CONN_SYN_SENT, psutil.CONN_SYN_RECV] |
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terminated_states = [ |
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psutil.CONN_FIN_WAIT1, |
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psutil.CONN_FIN_WAIT2, |
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psutil.CONN_TIME_WAIT, |
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psutil.CONN_CLOSE, |
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psutil.CONN_CLOSE_WAIT, |
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psutil.CONN_LAST_ACK, |
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] |
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conntrack = { |
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'nf_conntrack_count': '/proc/sys/net/netfilter/nf_conntrack_count', |
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'nf_conntrack_max': '/proc/sys/net/netfilter/nf_conntrack_max', |
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} |
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def __init__(self, args=None, config=None): |
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"""Init the plugin.""" |
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super(PluginModel, self).__init__( |
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args=args, |
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config=config, |
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# items_history_list=items_history_list, |
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stats_init_value={'net_connections_enabled': True, 'nf_conntrack_enabled': True}, |
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) |
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# We want to display the stat in the curse interface |
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self.display_curse = True |
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@GlancesPluginModel._check_decorator |
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@GlancesPluginModel._log_result_decorator |
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def update(self): |
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"""Update connections stats using the input method. |
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Stats is a dict |
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""" |
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# Init new stats |
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stats = self.get_init_value() |
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if self.input_method == 'local': |
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# Update stats using the PSUtils lib |
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# Grab network interface stat using the psutil net_connections method |
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if stats['net_connections_enabled']: |
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try: |
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net_connections = psutil.net_connections(kind="tcp") |
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except Exception as e: |
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logger.warning('Can not get network connections stats ({})'.format(e)) |
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logger.info('Disable connections stats') |
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stats['net_connections_enabled'] = False |
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self.stats = stats |
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return self.stats |
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for s in self.status_list: |
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stats[s] = len([c for c in net_connections if c.status == s]) |
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initiated = 0 |
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for s in self.initiated_states: |
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stats[s] = len([c for c in net_connections if c.status == s]) |
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initiated += stats[s] |
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stats['initiated'] = initiated |
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terminated = 0 |
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for s in self.initiated_states: |
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stats[s] = len([c for c in net_connections if c.status == s]) |
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terminated += stats[s] |
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stats['terminated'] = terminated |
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if stats['nf_conntrack_enabled']: |
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# Grab connections track directly from the /proc file |
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for i in self.conntrack: |
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try: |
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with open(self.conntrack[i], 'r') as f: |
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stats[i] = float(f.readline().rstrip("\n")) |
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except (IOError, FileNotFoundError) as e: |
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logger.warning('Can not get network connections track ({})'.format(e)) |
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logger.info('Disable connections track') |
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stats['nf_conntrack_enabled'] = False |
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self.stats = stats |
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return self.stats |
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if 'nf_conntrack_max' in stats and 'nf_conntrack_count' in stats: |
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stats['nf_conntrack_percent'] = stats['nf_conntrack_count'] * 100 / stats['nf_conntrack_max'] |
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else: |
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stats['nf_conntrack_enabled'] = False |
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self.stats = stats |
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return self.stats |
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elif self.input_method == 'snmp': |
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# Update stats using SNMP |
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pass |
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# Update the stats |
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self.stats = stats |
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return self.stats |
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def update_views(self): |
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"""Update stats views.""" |
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# Call the father's method |
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super(PluginModel, self).update_views() |
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# Add specific information |
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try: |
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# Alert and log |
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if self.stats['nf_conntrack_enabled']: |
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self.views['nf_conntrack_percent']['decoration'] = self.get_alert(header='nf_conntrack_percent') |
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except KeyError: |
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# try/except mandatory for Windows compatibility (no conntrack stats) |
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pass |
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def msg_curse(self, args=None, max_width=None): |
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"""Return the dict to display in the curse interface.""" |
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# Init the return message |
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ret = [] |
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# Only process if stats exist and display plugin enable... |
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if not self.stats or self.is_disabled(): |
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return ret |
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# Header |
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if self.stats['net_connections_enabled'] or self.stats['nf_conntrack_enabled']: |
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msg = '{}'.format('TCP CONNECTIONS') |
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ret.append(self.curse_add_line(msg, "TITLE")) |
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# Connections status |
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if self.stats['net_connections_enabled']: |
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for s in [psutil.CONN_LISTEN, 'initiated', psutil.CONN_ESTABLISHED, 'terminated']: |
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ret.append(self.curse_new_line()) |
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msg = '{:{width}}'.format(nativestr(s).capitalize(), width=len(s)) |
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ret.append(self.curse_add_line(msg)) |
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msg = '{:>{width}}'.format(self.stats[s], width=max_width - len(s) + 2) |
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ret.append(self.curse_add_line(msg)) |
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# Connections track |
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if ( |
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self.stats['nf_conntrack_enabled'] |
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and 'nf_conntrack_count' in self.stats |
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and 'nf_conntrack_max' in self.stats |
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): |
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s = 'Tracked' |
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ret.append(self.curse_new_line()) |
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msg = '{:{width}}'.format(nativestr(s).capitalize(), width=len(s)) |
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ret.append(self.curse_add_line(msg)) |
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msg = '{:>{width}}'.format( |
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'{:0.0f}/{:0.0f}'.format(self.stats['nf_conntrack_count'], self.stats['nf_conntrack_max']), |
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width=max_width - len(s) + 2, |
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) |
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ret.append(self.curse_add_line(msg, self.get_views(key='nf_conntrack_percent', option='decoration'))) |
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return ret |
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nicolargo /
glances
