finish check_openwrt_bssid.py
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691e471cd8
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@ -1,28 +1,112 @@
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#!/usr/bin/env python3
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import argparse
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import json
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import re
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import sys
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import traceback
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import paramiko
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from checker import nagios
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from checker.result import quit_check
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from checker.types import try_int, try_float
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def check_bssid():
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hostname = 'hostname'
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username = 'username'
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password = 'password'
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specific_bssid = 'specific_bssid'
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command = 'iw wlan0 scan | grep BSS'
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def main(args):
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command = 'iwinfo scan0 scan'
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ssh = paramiko.SSHClient()
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ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
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ssh.connect(hostname, username=username, password=password)
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try:
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ssh.connect(args.host, username='root')
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except paramiko.ssh_exception.AuthenticationException:
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print(f'SSH authentication to {args.host} failed! Make sure your key exists on the remote system or copy it over with ssh-copy-id')
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sys.exit(1)
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stdin, stdout, stderr = ssh.exec_command(command)
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output = stdout.readlines()
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output = [str(x).strip('\n').strip(' ') for x in stdout.readlines()]
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cells = {}
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for line in output:
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if specific_bssid in line:
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print(f'BSSID {specific_bssid} is present.')
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return True
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if line.startswith('Cell '):
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address = re.search(r'Address:\s(.*?)$', line).group(1)
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cells[address] = {}
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elif line.startswith('ESSID: '):
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if line == 'ESSID: unknown':
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ssid = None
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else:
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ssid = re.search(r'ESSID:\s"(.*?)"$', line).group(1)
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cells[list(cells.keys())[-1]]['ssid'] = ssid
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elif line.startswith('Mode: '):
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m = re.search(r'Mode: .*?\s\sFrequency: ([0-9.]*) GHz\s\sBand: ([0-9.]*) GHz\s\sChannel: ([0-9]*)$', line)
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cells[list(cells.keys())[-1]]['freq'] = try_float(m.group(1))
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cells[list(cells.keys())[-1]]['band'] = try_float(m.group(2))
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cells[list(cells.keys())[-1]]['chan'] = try_int(m.group(3))
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elif line.startswith('Encryption: '):
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enc = re.search(r'Encryption: (.*?)$', line).group(1)
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cells[list(cells.keys())[-1]]['enc'] = enc
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elif line.startswith('Channel Width: '):
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width = re.search(r'Channel Width: (.*?)$', line).group(1)
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cells[list(cells.keys())[-1]]['chan_width'] = width
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elif line.startswith('Signal: '):
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m = re.search(r'Signal: (-[0-9]*) dBm\s\sQuality: ([0-9]*)/([0-9]*)$', line)
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cells[list(cells.keys())[-1]]['signal'] = try_int(m.group(1))
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cells[list(cells.keys())[-1]]['quality'] = (try_int(m.group(2)), try_int(m.group(3)))
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print(f'BSSID {specific_bssid} is not present.')
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return False
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if args.print:
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print(json.dumps(cells))
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sys.exit(nagios.STATE_UNKNOWN)
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if args.target_mac not in list(cells.keys()):
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quit_check(f'AP address not found: {args.target_mac}', nagios.STATE_CRIT)
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ap_data = cells[args.target_mac]
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computed_quality = int(try_float(ap_data['quality'][0]) / try_float(ap_data['quality'][1]) * 100)
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perfdata = {
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'signal': {'value': try_int(ap_data['signal']), 'warn': args.signal_warn, 'crit': args.signal_crit},
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'quality': {'value': int(computed_quality), 'warn': args.quality_warn, 'crit': args.quality_crit, 'unit': '%'},
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'freq': {'value': ap_data['freq']},
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'band': {'value': ap_data['band']},
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'chan': {'value': ap_data['chan']},
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'chan_width': {'value': ap_data['chan_width']},
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}
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if ap_data['ssid'] != args.expected_ssid:
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quit_check(f'AP does not have the right SSID.\n{json.dumps(ap_data)}', nagios.STATE_CRIT, perfdata=perfdata)
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if ap_data['signal'] <= args.signal_crit:
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quit_check(f'Signal strength is weak: {ap_data["signal"]} dBm', nagios.STATE_CRIT, perfdata=perfdata)
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if ap_data['signal'] <= args.signal_warn:
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quit_check(f'Signal strength is weak: {ap_data["signal"]} dBm', nagios.STATE_WARN, perfdata=perfdata)
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if computed_quality <= args.quality_crit:
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quit_check(f'Signal quality is low: {ap_data["quality"][0]}/{ap_data["quality"][1]} ({computed_quality}%)', nagios.STATE_CRIT, perfdata=perfdata)
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if computed_quality <= args.quality_warn:
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quit_check(f'Signal quality is low: {ap_data["quality"][0]}/{ap_data["quality"][1]} ({computed_quality}%)', nagios.STATE_WARN, perfdata=perfdata)
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quit_check(f"{ap_data['ssid']} ({args.target_mac}) is healthy. Signal: {ap_data['signal']} dBm. Quality: {computed_quality}%. Frequency: {ap_data['freq']} GHz. Band: {ap_data['band']} GHz. Channel: {ap_data['chan']} @ {ap_data['chan_width']} width. Encryption: {ap_data['enc']}.",
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nagios.STATE_OK,
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perfdata=perfdata)
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check_bssid()
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if __name__ == '__main__':
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parser = argparse.ArgumentParser()
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parser.add_argument('--host', required=True, help='The host to SSH into.')
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parser.add_argument('--print', action='store_true', help='Print the found APs.')
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parser.add_argument('--target-mac', required=True, help='The MAC address of the target AP.')
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parser.add_argument('--expected-ssid', required=True, help="The AP's expected SSID.")
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parser.add_argument('--signal-warn', type=int, required=True, help='If the signal strength is less than this, trigger warn.')
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parser.add_argument('--signal-crit', type=int, required=True, help='If the signal strength is less than this, trigger crit.')
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parser.add_argument('--quality-warn', type=int, required=True, help='If the signal quality is less than this percentage, trigger warn.')
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parser.add_argument('--quality-crit', type=int, required=True, help='If the signal quality is less than this percentage, trigger crit.')
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args = parser.parse_args()
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try:
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main(args)
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except Exception as e:
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print(f'UNKNOWN - exception "{e}"')
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traceback.print_exc()
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sys.exit(nagios.STATE_UNKNOWN)
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@ -10,3 +10,4 @@ pysnmp==4.4.12
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aiofiles==0.6.0
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python-magic==0.4.27
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markdown==3.4.4
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paramiko==3.4.0
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