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show_ipsec_sa.py
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show_ipsec_sa.py
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#!/usr/bin/env python3
#
# Copyright (C) 2019 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import re
import sys
import vici
import tabulate
import hurry.filesize
import vyos.util
try:
session = vici.Session()
sas = session.list_sas()
except PermissionError:
print("You do not have a permission to connect to the IPsec daemon")
sys.exit(1)
except ConnectionRefusedError:
print("IPsec is not runing")
sys.exit(1)
except Exception as e:
print("An error occured: {0}".format(e))
sys.exit(1)
sa_data = []
for sa in sas:
# list_sas() returns a list of single-item dicts
for peer in sa:
parent_sa = sa[peer]
if parent_sa["state"] == b"ESTABLISHED":
state = "up"
else:
state = "down"
if state == "up":
uptime = vyos.util.seconds_to_human(parent_sa["established"].decode())
else:
uptime = "N/A"
remote_host = parent_sa["remote-host"].decode()
remote_id = parent_sa["remote-id"].decode()
if remote_host == remote_id:
remote_id = "N/A"
# The counters can only be obtained from the child SAs
child_sas = parent_sa["child-sas"]
installed_sas = {k: v for k, v in child_sas.items() if v["state"] == b"INSTALLED"}
if not installed_sas:
data = [peer, state, "N/A", "N/A", "N/A", "N/A", "N/A", "N/A"]
sa_data.append(data)
else:
for csa in installed_sas:
isa = installed_sas[csa]
bytes_in = hurry.filesize.size(int(isa["bytes-in"].decode()))
bytes_out = hurry.filesize.size(int(isa["bytes-out"].decode()))
bytes_str = "{0}/{1}".format(bytes_in, bytes_out)
pkts_in = hurry.filesize.size(int(isa["packets-in"].decode()), system=hurry.filesize.si)
pkts_out = hurry.filesize.size(int(isa["packets-out"].decode()), system=hurry.filesize.si)
pkts_str = "{0}/{1}".format(pkts_in, pkts_out)
# Remove B from <1K values
pkts_str = re.sub(r'B', r'', pkts_str)
enc = isa["encr-alg"].decode()
if "encr-keysize" in isa:
key_size = isa["encr-keysize"].decode()
else:
key_size = ""
if "integ-alg" in isa:
hash = isa["integ-alg"].decode()
else:
hash = ""
if "dh-group" in isa:
dh_group = isa["dh-group"].decode()
else:
dh_group = ""
proposal = enc
if key_size:
proposal = "{0}_{1}".format(proposal, key_size)
if hash:
proposal = "{0}/{1}".format(proposal, hash)
if dh_group:
proposal = "{0}/{1}".format(proposal, dh_group)
data = [peer, state, uptime, bytes_str, pkts_str, remote_host, remote_id, proposal]
sa_data.append(data)
headers = ["Connection", "State", "Uptime", "Bytes In/Out", "Packets In/Out", "Remote address", "Remote ID", "Proposal"]
output = tabulate.tabulate(sa_data, headers)
print(output)

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show_ipsec_sa.py (3 KB)

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