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authorChristian Breunig <christian@breunig.cc>2023-12-30 23:25:20 +0100
committerChristian Breunig <christian@breunig.cc>2023-12-31 23:49:48 +0100
commit4ef110fd2c501b718344c72d495ad7e16d2bd465 (patch)
treee98bf08f93c029ec4431a3b6ca078e7562e0cc58 /src/conf_mode/interfaces_wwan.py
parent2286b8600da6c631b17e1d5b9b341843e50f9abf (diff)
downloadvyos-1x-4ef110fd2c501b718344c72d495ad7e16d2bd465.tar.gz
vyos-1x-4ef110fd2c501b718344c72d495ad7e16d2bd465.zip
T5474: establish common file name pattern for XML conf mode commands
We will use _ as CLI level divider. The XML definition filename and also the Python helper should match the CLI node. Example: set interfaces ethernet -> interfaces_ethernet.xml.in set interfaces bond -> interfaces_bond.xml.in set service dhcp-server -> service_dhcp-server-xml.in
Diffstat (limited to 'src/conf_mode/interfaces_wwan.py')
-rwxr-xr-xsrc/conf_mode/interfaces_wwan.py189
1 files changed, 189 insertions, 0 deletions
diff --git a/src/conf_mode/interfaces_wwan.py b/src/conf_mode/interfaces_wwan.py
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+++ b/src/conf_mode/interfaces_wwan.py
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+#!/usr/bin/env python3
+#
+# Copyright (C) 2020-2022 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
+
+from sys import exit
+from time import sleep
+
+from vyos.config import Config
+from vyos.configdict import get_interface_dict
+from vyos.configdict import is_node_changed
+from vyos.configverify import verify_authentication
+from vyos.configverify import verify_interface_exists
+from vyos.configverify import verify_mirror_redirect
+from vyos.configverify import verify_vrf
+from vyos.ifconfig import WWANIf
+from vyos.utils.dict import dict_search
+from vyos.utils.process import cmd
+from vyos.utils.process import call
+from vyos.utils.process import DEVNULL
+from vyos.utils.process import is_systemd_service_active
+from vyos.utils.file import write_file
+from vyos import ConfigError
+from vyos import airbag
+airbag.enable()
+
+service_name = 'ModemManager.service'
+cron_script = '/etc/cron.d/vyos-wwan'
+
+def get_config(config=None):
+ """
+ Retrive CLI config as dictionary. Dictionary can never be empty, as at least the
+ interface name will be added or a deleted flag
+ """
+ if config:
+ conf = config
+ else:
+ conf = Config()
+ base = ['interfaces', 'wwan']
+ ifname, wwan = get_interface_dict(conf, base)
+
+ # We should only terminate the WWAN session if critical parameters change.
+ # All parameters that can be changed on-the-fly (like interface description)
+ # should not lead to a reconnect!
+ tmp = is_node_changed(conf, base + [ifname, 'address'])
+ if tmp: wwan.update({'shutdown_required': {}})
+
+ tmp = is_node_changed(conf, base + [ifname, 'apn'])
+ if tmp: wwan.update({'shutdown_required': {}})
+
+ tmp = is_node_changed(conf, base + [ifname, 'disable'])
+ if tmp: wwan.update({'shutdown_required': {}})
+
+ tmp = is_node_changed(conf, base + [ifname, 'vrf'])
+ if tmp: wwan.update({'shutdown_required': {}})
+
+ tmp = is_node_changed(conf, base + [ifname, 'authentication'])
+ if tmp: wwan.update({'shutdown_required': {}})
+
+ tmp = is_node_changed(conf, base + [ifname, 'ipv6', 'address', 'autoconf'])
+ if tmp: wwan.update({'shutdown_required': {}})
+
+ # We need to know the amount of other WWAN interfaces as ModemManager needs
+ # to be started or stopped.
+ wwan['other_interfaces'] = conf.get_config_dict([], key_mangling=('-', '_'),
+ get_first_key=True,
+ no_tag_node_value_mangle=True)
+
+ # This if-clause is just to be sure - it will always evaluate to true
+ if ifname in wwan['other_interfaces']:
+ del wwan['other_interfaces'][ifname]
+ if len(wwan['other_interfaces']) == 0:
+ del wwan['other_interfaces']
+
+ return wwan
+
+def verify(wwan):
+ if 'deleted' in wwan:
+ return None
+
+ ifname = wwan['ifname']
+ if not 'apn' in wwan:
+ raise ConfigError(f'No APN configured for "{ifname}"!')
+
+ verify_interface_exists(ifname)
+ verify_authentication(wwan)
+ verify_vrf(wwan)
+ verify_mirror_redirect(wwan)
+
+ return None
+
+def generate(wwan):
+ if 'deleted' in wwan:
+ # We are the last WWAN interface - there are no other ones remaining
+ # thus the cronjob needs to go away, too
+ if 'other_interfaces' not in wwan:
+ if os.path.exists(cron_script):
+ os.unlink(cron_script)
+ return None
+
+ # Install cron triggered helper script to re-dial WWAN interfaces on
+ # disconnect - e.g. happens during RF signal loss. The script watches every
+ # WWAN interface - so there is only one instance.
+ if not os.path.exists(cron_script):
+ write_file(cron_script, '*/5 * * * * root /usr/libexec/vyos/vyos-check-wwan.py\n')
+
+ return None
+
+def apply(wwan):
+ # ModemManager is required to dial WWAN connections - one instance is
+ # required to serve all modems. Activate ModemManager on first invocation
+ # of any WWAN interface.
+ if not is_systemd_service_active(service_name):
+ cmd(f'systemctl start {service_name}')
+
+ counter = 100
+ # Wait until a modem is detected and then we can continue
+ while counter > 0:
+ counter -= 1
+ tmp = cmd('mmcli -L')
+ if tmp != 'No modems were found':
+ break
+ sleep(0.250)
+
+ if 'shutdown_required' in wwan:
+ # we only need the modem number. wwan0 -> 0, wwan1 -> 1
+ modem = wwan['ifname'].lstrip('wwan')
+ base_cmd = f'mmcli --modem {modem}'
+ # Number of bearers is limited - always disconnect first
+ cmd(f'{base_cmd} --simple-disconnect')
+
+ w = WWANIf(wwan['ifname'])
+ if 'deleted' in wwan or 'disable' in wwan:
+ w.remove()
+
+ # We are the last WWAN interface - there are no other WWAN interfaces
+ # remaining, thus we can stop ModemManager and free resources.
+ if 'other_interfaces' not in wwan:
+ cmd(f'systemctl stop {service_name}')
+ # Clean CRON helper script which is used for to re-connect when
+ # RF signal is lost
+ if os.path.exists(cron_script):
+ os.unlink(cron_script)
+
+ return None
+
+ if 'shutdown_required' in wwan:
+ ip_type = 'ipv4'
+ slaac = dict_search('ipv6.address.autoconf', wwan) != None
+ if 'address' in wwan:
+ if 'dhcp' in wwan['address'] and ('dhcpv6' in wwan['address'] or slaac):
+ ip_type = 'ipv4v6'
+ elif 'dhcpv6' in wwan['address'] or slaac:
+ ip_type = 'ipv6'
+ elif 'dhcp' in wwan['address']:
+ ip_type = 'ipv4'
+
+ options = f'ip-type={ip_type},apn=' + wwan['apn']
+ if 'authentication' in wwan:
+ options += ',user={username},password={password}'.format(**wwan['authentication'])
+
+ command = f'{base_cmd} --simple-connect="{options}"'
+ call(command, stdout=DEVNULL)
+
+ w.update(wwan)
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ exit(1)