add check_openwrt_clients

check_openwrt_clients.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python3
+import argparse
+import json
+import re
+import sys
+import time
+import traceback
+
+import paramiko
+
+from checker import nagios
+from checker.result import quit_check
+from checker.types import try_int, try_float
+
+WIFI_2 = list(range(1, 12))
+WIFI_5 = list(range(32, 178))
+
+
+def main(args):
+    ssh = paramiko.SSHClient()
+    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
+
+    try:
+        ssh.connect(args.host, username='root')
+    except paramiko.ssh_exception.AuthenticationException:
+        quit_check(
+            f'SSH authentication to root@{args.host} failed! Make sure your key exists on the remote system or copy it over with ssh-copy-id',
+            nagios.STATE_UNKNOWN)
+        sys.exit(nagios.STATE_UNKNOWN)
+    except paramiko.ssh_exception.NoValidConnectionsError:
+        quit_check(f'SSH connection failed to {args.host}', nagios.STATE_UNKNOWN)
+
+    stdin, stdout, stderr = ssh.exec_command(f'iwinfo {args.interface} assoclist')
+    if stdout.channel.recv_exit_status() != 0:
+        quit_check(f'command failed:\nSTDOUT: {"".join(stdout.readlines())}\nSTDERR: {"".join(stderr.readlines())}',
+                   nagios.STATE_UNKNOWN)
+    output = [str(x).strip('\n').strip(' ') for x in stdout.readlines()]
+
+    connected_clients = 0
+    for line in output:
+        is_header_line = bool(
+            re.search(r'^[\t\s\n]', line) is None and len(line) and 'No station connected' not in line
+        )
+        if is_header_line:
+            connected_clients += 1
+
+    perfdata = {
+        'connected_clients': {'value': connected_clients, 'min': 0},
+    }
+
+    quit_check(
+        f"{connected_clients} connected clients on {args.interface}",
+        nagios.STATE_OK,
+        perfdata=perfdata)
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--host', required=True, help='The host to SSH into.')
+    parser.add_argument('--interface', required=True, help='The wireless interface to use (example: `wlan0`).')
+    args = parser.parse_args()
+
+    try:
+        main(args)
+    except Exception as e:
+        print(f'UNKNOWN - exception "{e}"')
+        traceback.print_exc()
+        sys.exit(nagios.STATE_UNKNOWN)