#!/usr/bin/env python3 import re import sys import subprocess import tabulate import hurry.filesize def parse_conn_spec(s): try: # Example: ESTABLISHED 14 seconds ago, 10.0.0.2[foo]...10.0.0.1[10.0.0.1] return re.search(r'.*ESTABLISHED\s+(.*)ago,\s(.*)\[(.*)\]\.\.\.(.*)\[(.*)\].*', s).groups() except AttributeError: # No active SAs found, so we have nothing to display print("No established security associations found.") print("Use \"show vpn ipsec sa\" to view inactive and connecting tunnels.") sys.exit(0) def parse_ike_line(s): try: # Example with traffic: AES_CBC_256/HMAC_SHA2_256_128/ECP_521, 2382660 bytes_i (1789 pkts, 2s ago), 2382660 bytes_o ... return re.search(r'.*:\s+(.*)\/(.*)\/(.*),\s+(\d+)\s+bytes_i\s\(.*pkts,.*\),\s+(\d+)\s+bytes_o', s).groups() except AttributeError: try: # Example without traffic: 3DES_CBC/HMAC_MD5_96/MODP_1024, 0 bytes_i, 0 bytes_o, rekeying in 45 minutes return re.search(r'.*:\s+(.*)\/(.*)\/(.*),\s+(\d+)\s+bytes_i,\s+(\d+)\s+bytes_o,\s+rekeying', s).groups() except AttributeError: return (None, None, None, None, None) # Get a list of all configured connections with open('/etc/ipsec.conf', 'r') as f: config = f.read() connections = set(re.findall(r'conn\s([^\s]+)\s*\n', config)) connections = list(filter(lambda s: s != '%default', connections)) status_data = [] for conn in connections: status = subprocess.check_output("ipsec statusall {0}".format(conn), shell=True).decode() if re.search(r'no match', status): status_line = [conn, "down", None, None, None, None, None] else: try: time, _, _, ip, id = parse_conn_spec(status) if ip == id: id = None enc, hash, dh, bytes_in, bytes_out = parse_ike_line(status) # Convert bytes to human-readable units bytes_in = hurry.filesize.size(int(bytes_in)) bytes_out = hurry.filesize.size(int(bytes_out)) status_line = [conn, "up", time, "{0}/{1}".format(bytes_in, bytes_out), ip, id, "{0}/{1}/{2}".format(enc, hash, dh)] except Exception as e: print(status) raise e status_line = [conn, None, None, None, None, None] status_line = list(map(lambda x: "N/A" if x is None else x, status_line)) status_data.append(status_line) headers = ["Connection", "State", "Up", "Bytes In/Out", "Remote address", "Remote ID", "Proposal"] output = tabulate.tabulate(status_data, headers) print(output)