diff options
Diffstat (limited to 'src/etc/opennhrp/opennhrp-script.py')
| -rwxr-xr-x | src/etc/opennhrp/opennhrp-script.py | 371 |
1 files changed, 0 insertions, 371 deletions
diff --git a/src/etc/opennhrp/opennhrp-script.py b/src/etc/opennhrp/opennhrp-script.py deleted file mode 100755 index f6f6d075c..000000000 --- a/src/etc/opennhrp/opennhrp-script.py +++ /dev/null @@ -1,371 +0,0 @@ -#!/usr/bin/env python3 -# -# Copyright (C) 2021-2023 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 re -import sys -import vyos.ipsec - -from json import loads -from pathlib import Path - -from vyos.logger import getLogger -from vyos.utils.process import cmd -from vyos.utils.process import process_named_running - -NHRP_CONFIG: str = '/run/opennhrp/opennhrp.conf' - - -def vici_get_ipsec_uniqueid(conn: str, src_nbma: str, - dst_nbma: str) -> list[str]: - """ Find and return IKE SAs by src nbma and dst nbma - - Args: - conn (str): a connection name - src_nbma (str): an IP address of NBMA source - dst_nbma (str): an IP address of NBMA destination - - Returns: - list: a list of IKE connections that match a criteria - """ - if not conn or not src_nbma or not dst_nbma: - logger.error( - f'Incomplete input data for resolving IKE unique ids: ' - f'conn: {conn}, src_nbma: {src_nbma}, dst_nbma: {dst_nbma}') - return [] - - try: - logger.info( - f'Resolving IKE unique ids for: conn: {conn}, ' - f'src_nbma: {src_nbma}, dst_nbma: {dst_nbma}') - list_ikeid: list[str] = [] - list_sa: list = vyos.ipsec.get_vici_sas_by_name(conn, None) - for sa in list_sa: - if sa[conn]['local-host'].decode('ascii') == src_nbma \ - and sa[conn]['remote-host'].decode('ascii') == dst_nbma: - list_ikeid.append(sa[conn]['uniqueid'].decode('ascii')) - return list_ikeid - except Exception as err: - logger.error(f'Unable to find unique ids for IKE: {err}') - return [] - - -def vici_ike_terminate(list_ikeid: list[str]) -> bool: - """Terminating IKE SAs by list of IKE IDs - - Args: - list_ikeid (list[str]): a list of IKE ids to terminate - - Returns: - bool: result of termination action - """ - if not list: - logger.warning('An empty list for termination was provided') - return False - - try: - vyos.ipsec.terminate_vici_ikeid_list(list_ikeid) - return True - except Exception as err: - logger.error(f'Failed to terminate SA for IKE ids {list_ikeid}: {err}') - return False - - -def parse_type_ipsec(interface: str) -> tuple[str, str]: - """Get DMVPN Type and NHRP Profile from the configuration - - Args: - interface (str): a name of interface - - Returns: - tuple[str, str]: `peer_type` and `profile_name` - """ - if not interface: - logger.error('Cannot find peer type - no input provided') - return '', '' - - config_file: str = Path(NHRP_CONFIG).read_text() - regex: str = rf'^interface {interface} #(?P<peer_type>hub|spoke) ?(?P<profile_name>[^\n]*)$' - match = re.search(regex, config_file, re.M) - if match: - return match.groupdict()['peer_type'], match.groupdict()[ - 'profile_name'] - return '', '' - - -def add_peer_route(nbma_src: str, nbma_dst: str, mtu: str) -> None: - """Add a route to a NBMA peer - - Args: - nbma_src (str): a local IP address - nbma_dst (str): a remote IP address - mtu (str): a MTU for a route - """ - logger.info(f'Adding route from {nbma_src} to {nbma_dst} with MTU {mtu}') - # Find routes to a peer - route_get_cmd: str = f'sudo ip --json route get {nbma_dst} from {nbma_src}' - try: - route_info_data = loads(cmd(route_get_cmd)) - except Exception as err: - logger.error(f'Unable to find a route to {nbma_dst}: {err}') - return - - # Check if an output has an expected format - if not isinstance(route_info_data, list): - logger.error( - f'Garbage returned from the "{route_get_cmd}" ' - f'command: {route_info_data}') - return - - # Add static routes to a peer - for route_item in route_info_data: - route_dev = route_item.get('dev') - route_dst = route_item.get('dst') - route_gateway = route_item.get('gateway') - # Prepare a command to add a route - route_add_cmd = 'sudo ip route add' - if route_dst: - route_add_cmd = f'{route_add_cmd} {route_dst}' - if route_gateway: - route_add_cmd = f'{route_add_cmd} via {route_gateway}' - if route_dev: - route_add_cmd = f'{route_add_cmd} dev {route_dev}' - route_add_cmd = f'{route_add_cmd} proto 42 mtu {mtu}' - # Add a route - try: - cmd(route_add_cmd) - except Exception as err: - logger.error( - f'Unable to add a route using command "{route_add_cmd}": ' - f'{err}') - - -def vici_initiate(conn: str, child_sa: str, src_addr: str, - dest_addr: str) -> bool: - """Initiate IKE SA connection with specific peer - - Args: - conn (str): an IKE connection name - child_sa (str): a child SA profile name - src_addr (str): NBMA local address - dest_addr (str): NBMA address of a peer - - Returns: - bool: a result of initiation command - """ - logger.info( - f'Trying to initiate connection. Name: {conn}, child sa: {child_sa}, ' - f'src_addr: {src_addr}, dst_addr: {dest_addr}') - try: - vyos.ipsec.vici_initiate(conn, child_sa, src_addr, dest_addr) - return True - except Exception as err: - logger.error(f'Unable to initiate connection {err}') - return False - - -def vici_terminate(conn: str, src_addr: str, dest_addr: str) -> None: - """Find and terminate IKE SAs by local NBMA and remote NBMA addresses - - Args: - conn (str): IKE connection name - src_addr (str): NBMA local address - dest_addr (str): NBMA address of a peer - """ - logger.info( - f'Terminating IKE connection {conn} between {src_addr} ' - f'and {dest_addr}') - - ikeid_list: list[str] = vici_get_ipsec_uniqueid(conn, src_addr, dest_addr) - - if not ikeid_list: - logger.warning( - f'No active sessions found for IKE profile {conn}, ' - f'local NBMA {src_addr}, remote NBMA {dest_addr}') - else: - try: - vyos.ipsec.terminate_vici_ikeid_list(ikeid_list) - except Exception as err: - logger.error( - f'Failed to terminate SA for IKE ids {ikeid_list}: {err}') - -def iface_up(interface: str) -> None: - """Proceed tunnel interface UP event - - Args: - interface (str): an interface name - """ - if not interface: - logger.warning('No interface name provided for UP event') - - logger.info(f'Turning up interface {interface}') - try: - cmd(f'sudo ip route flush proto 42 dev {interface}') - cmd(f'sudo ip neigh flush dev {interface}') - except Exception as err: - logger.error( - f'Unable to flush route on interface "{interface}": {err}') - - -def peer_up(dmvpn_type: str, conn: str) -> None: - """Proceed NHRP peer UP event - - Args: - dmvpn_type (str): a type of peer - conn (str): an IKE profile name - """ - logger.info(f'Peer UP event for {dmvpn_type} using IKE profile {conn}') - src_nbma = os.getenv('NHRP_SRCNBMA') - dest_nbma = os.getenv('NHRP_DESTNBMA') - dest_mtu = os.getenv('NHRP_DESTMTU') - - if not src_nbma or not dest_nbma: - logger.error( - f'Can not get NHRP NBMA addresses: local {src_nbma}, ' - f'remote {dest_nbma}') - return - - logger.info(f'NBMA addresses: local {src_nbma}, remote {dest_nbma}') - if dest_mtu: - add_peer_route(src_nbma, dest_nbma, dest_mtu) - if conn and dmvpn_type == 'spoke' and process_named_running('charon'): - vici_terminate(conn, src_nbma, dest_nbma) - vici_initiate(conn, 'dmvpn', src_nbma, dest_nbma) - - -def peer_down(dmvpn_type: str, conn: str) -> None: - """Proceed NHRP peer DOWN event - - Args: - dmvpn_type (str): a type of peer - conn (str): an IKE profile name - """ - logger.info(f'Peer DOWN event for {dmvpn_type} using IKE profile {conn}') - - src_nbma = os.getenv('NHRP_SRCNBMA') - dest_nbma = os.getenv('NHRP_DESTNBMA') - - if not src_nbma or not dest_nbma: - logger.error( - f'Can not get NHRP NBMA addresses: local {src_nbma}, ' - f'remote {dest_nbma}') - return - - logger.info(f'NBMA addresses: local {src_nbma}, remote {dest_nbma}') - if conn and dmvpn_type == 'spoke' and process_named_running('charon'): - vici_terminate(conn, src_nbma, dest_nbma) - try: - cmd(f'sudo ip route del {dest_nbma} src {src_nbma} proto 42') - except Exception as err: - logger.error( - f'Unable to del route from {src_nbma} to {dest_nbma}: {err}') - - -def route_up(interface: str) -> None: - """Proceed NHRP route UP event - - Args: - interface (str): an interface name - """ - logger.info(f'Route UP event for interface {interface}') - - dest_addr = os.getenv('NHRP_DESTADDR') - dest_prefix = os.getenv('NHRP_DESTPREFIX') - next_hop = os.getenv('NHRP_NEXTHOP') - - if not dest_addr or not dest_prefix or not next_hop: - logger.error( - f'Can not get route details: dest_addr {dest_addr}, ' - f'dest_prefix {dest_prefix}, next_hop {next_hop}') - return - - logger.info( - f'Route details: dest_addr {dest_addr}, dest_prefix {dest_prefix}, ' - f'next_hop {next_hop}') - - try: - cmd(f'sudo ip route replace {dest_addr}/{dest_prefix} proto 42 \ - via {next_hop} dev {interface}') - cmd('sudo ip route flush cache') - except Exception as err: - logger.error( - f'Unable replace or flush route to {dest_addr}/{dest_prefix} ' - f'via {next_hop} dev {interface}: {err}') - - -def route_down(interface: str) -> None: - """Proceed NHRP route DOWN event - - Args: - interface (str): an interface name - """ - logger.info(f'Route DOWN event for interface {interface}') - - dest_addr = os.getenv('NHRP_DESTADDR') - dest_prefix = os.getenv('NHRP_DESTPREFIX') - - if not dest_addr or not dest_prefix: - logger.error( - f'Can not get route details: dest_addr {dest_addr}, ' - f'dest_prefix {dest_prefix}') - return - - logger.info( - f'Route details: dest_addr {dest_addr}, dest_prefix {dest_prefix}') - try: - cmd(f'sudo ip route del {dest_addr}/{dest_prefix} proto 42') - cmd('sudo ip route flush cache') - except Exception as err: - logger.error( - f'Unable delete or flush route to {dest_addr}/{dest_prefix}: ' - f'{err}') - - -if __name__ == '__main__': - logger = getLogger('opennhrp-script', syslog=True) - logger.debug( - f'Running script with arguments: {sys.argv}, ' - f'environment: {os.environ}') - - action = sys.argv[1] - interface = os.getenv('NHRP_INTERFACE') - - if not interface: - logger.error('Can not get NHRP interface name') - sys.exit(1) - - dmvpn_type, profile_name = parse_type_ipsec(interface) - if not dmvpn_type: - logger.info(f'Interface {interface} is not NHRP tunnel') - sys.exit() - - dmvpn_conn: str = '' - if profile_name: - dmvpn_conn: str = f'dmvpn-{profile_name}-{interface}' - if action == 'interface-up': - iface_up(interface) - elif action == 'peer-register': - pass - elif action == 'peer-up': - peer_up(dmvpn_type, dmvpn_conn) - elif action == 'peer-down': - peer_down(dmvpn_type, dmvpn_conn) - elif action == 'route-up': - route_up(interface) - elif action == 'route-down': - route_down(interface) - - sys.exit() |