ipsec: T5042: Rewritten 'show vpn ipsec remote-access' command

Now 'show vpn ipsec remote-access' shows only IKEv2 Remote access
VPN IPSec connections.
Added option 'summary' that shows a summary table for
these connections.
Added option 'detail' that shows only RA SAs output of 'swanctl -l'
Added options 'username' and 'connection-id' that filters output.
Fixed output 'show vpn ipsec sa detail', the previous was
'show vpn ipsec sa verbose'.

2 files changed, 211 insertions, 61 deletions

diff --git a/src/op_mode/ipsec.py b/src/op_mode/ipsec.py
index 7f4fb72e5..db4948d7a 100755
--- a/src/op_mode/ipsec.py
+++ b/src/op_mode/ipsec.py
@@ -13,7 +13,6 @@
 #
 # 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 typing
@@ -24,6 +23,7 @@ from tabulate import tabulate
 
 from vyos.util import convert_data
 from vyos.util import seconds_to_human
+from vyos.util import cmd
 from vyos.configquery import ConfigTreeQuery
 
 import vyos.opmode
@@ -46,6 +46,25 @@ def _get_raw_data_sas():
     except (vyos.ipsec.ViciInitiateError) as err:
         raise vyos.opmode.UnconfiguredSubsystem(err)
 
+
+def _get_output_swanctl_sas_from_list(ra_output_list: list) -> str:
+    """
+    Template for output for VICI
+    Inserts \n after each IKE SA
+    :param ra_output_list: IKE SAs list
+    :type ra_output_list: list
+    :return: formatted string
+    :rtype: str
+    """
+    output = '';
+    for sa_val in ra_output_list:
+        for sa in sa_val.values():
+            swanctl_output: str = cmd(
+                f'sudo swanctl -l --ike-id {sa["uniqueid"]}')
+        output = f'{output}{swanctl_output}\n\n'
+    return output
+
+
 def _get_formatted_output_sas(sas):
     sa_data = []
     for sa in sas:
@@ -444,6 +463,7 @@ def reset_peer(peer: str, tunnel: typing.Optional[str] = None):
     except (vyos.ipsec.ViciCommandError) as err:
         raise vyos.opmode.IncorrectValue(err)
 
+
 def reset_all_peers():
     sitetosite_list = _get_all_sitetosite_peers_name_list()
     if sitetosite_list:
@@ -457,6 +477,7 @@ def reset_all_peers():
         raise vyos.opmode.UnconfiguredSubsystem(
             'VPN IPSec site-to-site is not configured, aborting')
 
+
 def _get_ra_session_list_by_username(username: typing.Optional[str] = None):
     """
     Return list of remote-access IKE_SAs uniqueids
@@ -466,15 +487,15 @@ def _get_ra_session_list_by_username(username: typing.Optional[str] = None):
     :rtype:
     """
     list_sa_id = []
-    sa_list = vyos.ipsec.get_vici_sas()
+    sa_list = _get_raw_data_sas()
     for sa_val in sa_list:
         for sa in sa_val.values():
             if 'remote-eap-id' in sa:
                 if username:
-                    if username == sa['remote-eap-id'].decode():
-                        list_sa_id.append(sa['uniqueid'].decode())
+                    if username == sa['remote-eap-id']:
+                        list_sa_id.append(sa['uniqueid'])
                 else:
-                    list_sa_id.append(sa['uniqueid'].decode())
+                    list_sa_id.append(sa['uniqueid'])
     return list_sa_id
 
 
@@ -556,6 +577,24 @@ def show_sa(raw: bool):
     return _get_formatted_output_sas(sa_data)
 
 
+def _get_output_sas_detail(ra_output_list: list) -> str:
+    """
+    Formate all IKE SAs detail output
+    :param ra_output_list: IKE SAs list
+    :type ra_output_list: list
+    :return: formatted RA IKE SAs detail output
+    :rtype: str
+    """
+    return _get_output_swanctl_sas_from_list(ra_output_list)
+
+
+def show_sa_detail(raw: bool):
+    sa_data = _get_raw_data_sas()
+    if raw:
+        return sa_data
+    return _get_output_sas_detail(sa_data)
+
+
 def show_connections(raw: bool):
     list_conns = _get_convert_data_connections()
     list_sas = _get_raw_data_sas()
@@ -573,6 +612,173 @@ def show_connections_summary(raw: bool):
         return _get_raw_connections_summary(list_conns, list_sas)
 
 
+def _get_ra_sessions(username: typing.Optional[str] = None) -> list:
+    """
+    Return list of remote-access IKE_SAs from VICI by username.
+    If username unspecified, return all remote-access IKE_SAs
+    :param username: Username of RA connection
+    :type username: str
+    :return: list of ra remote-access IKE_SAs
+    :rtype: list
+    """
+    list_sa = []
+    sa_list = _get_raw_data_sas()
+    for conn in sa_list:
+        for sa in conn.values():
+            if 'remote-eap-id' in sa:
+                if username:
+                    if username == sa['remote-eap-id']:
+                        list_sa.append(conn)
+                else:
+                    list_sa.append(conn)
+    return list_sa
+
+
+def _filter_ikesas(list_sa: list, filter_key: str, filter_value: str) -> list:
+    """
+    Filter IKE SAs by specifice key
+    :param list_sa: list of IKE SAs
+    :type list_sa: list
+    :param filter_key: Filter Key
+    :type filter_key: str
+    :param filter_value: Filter Value
+    :type filter_value: str
+    :return: Filtered list of IKE SAs
+    :rtype: list
+    """
+    filtered_sa_list = []
+    for conn in list_sa:
+        for sa in conn.values():
+            if sa[filter_key] and sa[filter_key] == filter_value:
+                filtered_sa_list.append(conn)
+    return filtered_sa_list
+
+
+def _get_last_installed_childsa(sa: dict) -> str:
+    """
+    Return name of last installed active Child SA
+    :param sa: Dictionary with Child SAs
+    :type sa: dict
+    :return: Name of the Last installed active Child SA
+    :rtype: str
+    """
+    child_sa_name = None
+    child_sa_id = 0
+    for sa_name, child_sa in sa['child-sas'].items():
+        if child_sa['state'] == 'INSTALLED':
+            if child_sa_id == 0 or int(child_sa['uniqueid']) > child_sa_id:
+                child_sa_id = int(child_sa['uniqueid'])
+                child_sa_name = sa_name
+    return child_sa_name
+
+
+def _get_formatted_ike_proposal(sa: dict) -> str:
+    """
+    Return IKE proposal string in format
+    EncrALG-EncrKeySize/PFR/HASH/DH-GROUP
+    :param sa: IKE SA
+    :type sa: dict
+    :return: IKE proposal string
+    :rtype: str
+    """
+    proposal = ''
+    proposal = f'{proposal}{sa["encr-alg"]}' if 'encr-alg' in sa else proposal
+    proposal = f'{proposal}-{sa["encr-keysize"]}' if 'encr-keysize' in sa else proposal
+    proposal = f'{proposal}/{sa["prf-alg"]}' if 'prf-alg' in sa else proposal
+    proposal = f'{proposal}/{sa["integ-alg"]}' if 'integ-alg' in sa else proposal
+    proposal = f'{proposal}/{sa["dh-group"]}' if 'dh-group' in sa else proposal
+    return proposal
+
+
+def _get_formatted_ipsec_proposal(sa: dict) -> str:
+    """
+    Return IPSec proposal string in format
+    Protocol: EncrALG-EncrKeySize/HASH/PFS
+    :param sa: Child SA
+    :type sa: dict
+    :return: IPSec proposal string
+    :rtype: str
+    """
+    proposal = ''
+    proposal = f'{proposal}{sa["protocol"]}' if 'protocol' in sa else proposal
+    proposal = f'{proposal}:{sa["encr-alg"]}' if 'encr-alg' in sa else proposal
+    proposal = f'{proposal}-{sa["encr-keysize"]}' if 'encr-keysize' in sa else proposal
+    proposal = f'{proposal}/{sa["integ-alg"]}' if 'integ-alg' in sa else proposal
+    proposal = f'{proposal}/{sa["dh-group"]}' if 'dh-group' in sa else proposal
+    return proposal
+
+
+def _get_output_ra_sas_detail(ra_output_list: list) -> str:
+    """
+    Formate RA IKE SAs detail output
+    :param ra_output_list: IKE SAs list
+    :type ra_output_list: list
+    :return: formatted RA IKE SAs detail output
+    :rtype: str
+    """
+    return _get_output_swanctl_sas_from_list(ra_output_list)
+
+
+def _get_formatted_output_ra_summary(ra_output_list: list):
+    sa_data = []
+    for conn in ra_output_list:
+        for sa in conn.values():
+            sa_id = sa['uniqueid'] if 'uniqueid' in sa else ''
+            sa_username = sa['remote-eap-id'] if 'remote-eap-id' in sa else ''
+            sa_protocol = f'IKEv{sa["version"]}' if 'version' in sa else ''
+            sa_remotehost = sa['remote-host'] if 'remote-host' in sa else ''
+            sa_remoteid = sa['remote-id'] if 'remote-id' in sa else ''
+            sa_ike_proposal = _get_formatted_ike_proposal(sa)
+            sa_tunnel_ip = sa['remote-vips']
+            child_sa_key = _get_last_installed_childsa(sa)
+            if child_sa_key:
+                child_sa = sa['child-sas'][child_sa_key]
+                sa_ipsec_proposal = _get_formatted_ipsec_proposal(child_sa)
+                sa_state = "UP"
+                sa_uptime = seconds_to_human(sa['established'])
+            else:
+                sa_ipsec_proposal = ''
+                sa_state = "DOWN"
+                sa_uptime = ''
+            sa_data.append(
+                [sa_id, sa_username, sa_protocol, sa_state, sa_uptime,
+                 sa_tunnel_ip,
+                 sa_remotehost, sa_remoteid, sa_ike_proposal,
+                 sa_ipsec_proposal])
+
+    headers = ["Connection ID", "Username", "Protocol", "State", "Uptime",
+               "Tunnel IP", "Remote Host", "Remote ID", "IKE Proposal",
+               "IPSec Proposal"]
+    sa_data = sorted(sa_data, key=_alphanum_key)
+    output = tabulate(sa_data, headers)
+    return output
+
+
+def show_ra_detail(raw: bool, username: typing.Optional[str] = None,
+                   conn_id: typing.Optional[str] = None):
+    list_sa: list = _get_ra_sessions()
+    if username:
+        list_sa = _filter_ikesas(list_sa, 'remote-eap-id', username)
+    elif conn_id:
+        list_sa = _filter_ikesas(list_sa, 'uniqueid', conn_id)
+    if not list_sa:
+        raise vyos.opmode.IncorrectValue(
+            f'No active connections found, aborting')
+    if raw:
+        return list_sa
+    return _get_output_ra_sas_detail(list_sa)
+
+
+def show_ra_summary(raw: bool):
+    list_sa: list = _get_ra_sessions()
+    if not list_sa:
+        raise vyos.opmode.IncorrectValue(
+            f'No active connections found, aborting')
+    if raw:
+        return list_sa
+    return _get_formatted_output_ra_summary(list_sa)
+
+
 if __name__ == '__main__':
     try:
         res = vyos.opmode.run(sys.modules[__name__])
diff --git a/src/op_mode/show_vpn_ra.py b/src/op_mode/show_vpn_ra.py
deleted file mode 100755
index 73688c4ea..000000000
--- a/src/op_mode/show_vpn_ra.py
+++ /dev/null
@@ -1,56 +0,0 @@
-#!/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 os
-import sys
-import re
-
-from vyos.util import popen
-
-# chech connection to pptp and l2tp daemon
-def get_sessions():
-    absent_pptp = False
-    absent_l2tp = False
-    pptp_cmd = "accel-cmd -p 2003 show sessions"
-    l2tp_cmd = "accel-cmd -p 2004 show sessions"
-    err_pattern = "^Connection.+failed$"
-    # This value for chack only output header without sessions.
-    len_def_header = 170
-    
-    # Check pptp
-    output, err = popen(pptp_cmd, decode='utf-8')
-    if not err and len(output) > len_def_header and not re.search(err_pattern, output):
-        print(output)
-    else:
-        absent_pptp = True
-
-    # Check l2tp
-    output, err = popen(l2tp_cmd, decode='utf-8')
-    if not err and len(output) > len_def_header and not re.search(err_pattern, output):
-        print(output)
-    else:
-        absent_l2tp = True
-
-    if absent_l2tp and absent_pptp:
-        print("No active remote access VPN sessions")
-
-
-def main():
-    get_sessions()
-
-
-if __name__ == '__main__':
-    main()