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show_ipsec_sa.py
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show_ipsec_sa.py
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#!/usr/bin/env python3
import re
import subprocess
import tabulate
def parse_conn_spec(s):
# 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()
def parse_ike_line(s):
# Example: 3DES_CBC/HMAC_MD5_96/MODP_1024, 0 bytes_i, 0 bytes_o, rekeying in 45 minutes
try:
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 = 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)
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)

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