diff options
Diffstat (limited to 'src/conf_mode/protocols_pim.py')
| -rwxr-xr-x | src/conf_mode/protocols_pim.py | 207 |
1 files changed, 101 insertions, 106 deletions
diff --git a/src/conf_mode/protocols_pim.py b/src/conf_mode/protocols_pim.py index 0aaa0d2c6..09c3be8df 100755 --- a/src/conf_mode/protocols_pim.py +++ b/src/conf_mode/protocols_pim.py @@ -16,144 +16,139 @@ import os -from ipaddress import IPv4Address +from ipaddress import IPv4Network +from signal import SIGTERM from sys import exit from vyos.config import Config -from vyos import ConfigError +from vyos.config import config_dict_merge +from vyos.configdict import node_changed +from vyos.configverify import verify_interface_exists from vyos.utils.process import process_named_running from vyos.utils.process import call -from vyos.template import render -from signal import SIGTERM - +from vyos.template import render_to_string +from vyos import ConfigError +from vyos import frr from vyos import airbag airbag.enable() -# Required to use the full path to pimd, in another case daemon will not be started -pimd_cmd = f'/usr/lib/frr/pimd -d -F traditional --daemon -A 127.0.0.1' - -config_file = r'/tmp/pimd.frr' - def get_config(config=None): if config: conf = config else: conf = Config() - pim_conf = { - 'pim_conf' : False, - 'igmp_conf' : False, - 'igmp_proxy_conf' : False, - 'old_pim' : { - 'ifaces' : {}, - 'rp' : {} - }, - 'pim' : { - 'ifaces' : {}, - 'rp' : {} - } - } - if not (conf.exists('protocols pim') or conf.exists_effective('protocols pim')): - return None - - if conf.exists('protocols igmp-proxy'): - pim_conf['igmp_proxy_conf'] = True - - if conf.exists('protocols igmp'): - pim_conf['igmp_conf'] = True - - if conf.exists('protocols pim'): - pim_conf['pim_conf'] = True - - conf.set_level('protocols pim') - - # Get interfaces - for iface in conf.list_effective_nodes('interface'): - pim_conf['old_pim']['ifaces'].update({ - iface : { - 'hello' : conf.return_effective_value('interface {0} hello'.format(iface)), - 'dr_prio' : conf.return_effective_value('interface {0} dr-priority'.format(iface)) - } - }) - for iface in conf.list_nodes('interface'): - pim_conf['pim']['ifaces'].update({ - iface : { - 'hello' : conf.return_value('interface {0} hello'.format(iface)), - 'dr_prio' : conf.return_value('interface {0} dr-priority'.format(iface)), - } - }) - - conf.set_level('protocols pim rp') - - # Get RPs addresses - for rp_addr in conf.list_effective_nodes('address'): - pim_conf['old_pim']['rp'][rp_addr] = conf.return_effective_values('address {0} group'.format(rp_addr)) - - for rp_addr in conf.list_nodes('address'): - pim_conf['pim']['rp'][rp_addr] = conf.return_values('address {0} group'.format(rp_addr)) - - # Get RP keep-alive-timer - if conf.exists_effective('rp keep-alive-timer'): - pim_conf['old_pim']['rp_keep_alive'] = conf.return_effective_value('rp keep-alive-timer') - if conf.exists('rp keep-alive-timer'): - pim_conf['pim']['rp_keep_alive'] = conf.return_value('rp keep-alive-timer') - - return pim_conf + base = ['protocols', 'pim'] + + pim = conf.get_config_dict(base, key_mangling=('-', '_'), + get_first_key=True, no_tag_node_value_mangle=True) + + # We can not run both IGMP proxy and PIM at the same time - get IGMP + # proxy status + if conf.exists(['protocols', 'igmp-proxy']): + pim.update({'igmp_proxy_enabled' : {}}) + + # FRR has VRF support for different routing daemons. As interfaces belong + # to VRFs - or the global VRF, we need to check for changed interfaces so + # that they will be properly rendered for the FRR config. Also this eases + # removal of interfaces from the running configuration. + interfaces_removed = node_changed(conf, base + ['interface']) + if interfaces_removed: + pim['interface_removed'] = list(interfaces_removed) + + # Bail out early if configuration tree does no longer exist. this must + # be done after retrieving the list of interfaces to be removed. + if not conf.exists(base): + pim.update({'deleted' : ''}) + return pim + + # We have gathered the dict representation of the CLI, but there are default + # options which we need to update into the dictionary retrived. + default_values = conf.get_config_defaults(**pim.kwargs, recursive=True) + + # We have to cleanup the default dict, as default values could enable features + # which are not explicitly enabled on the CLI. Example: default-information + # originate comes with a default metric-type of 2, which will enable the + # entire default-information originate tree, even when not set via CLI so we + # need to check this first and probably drop that key. + for interface in pim.get('interface', []): + # We need to reload the defaults on every pass b/c of + # hello-multiplier dependency on dead-interval + # If hello-multiplier is set, we need to remove the default from + # dead-interval. + if 'igmp' not in pim['interface'][interface]: + del default_values['interface'][interface]['igmp'] + + pim = config_dict_merge(default_values, pim) + return pim def verify(pim): - if pim is None: + if not pim or 'deleted' in pim: return None - if pim['pim_conf']: - # Check conflict with IGMP-Proxy - if pim['igmp_proxy_conf']: - raise ConfigError(f"IGMP proxy and PIM cannot be both configured at the same time") - - # Check interfaces - if not pim['pim']['ifaces']: - raise ConfigError(f"PIM require defined interfaces!") + if 'igmp_proxy_enabled' in pim: + raise ConfigError('IGMP proxy and PIM cannot be configured at the same time!') - if not pim['pim']['rp']: - raise ConfigError(f"RP address required") + if 'interface' not in pim: + raise ConfigError('PIM require defined interfaces!') - # Check unique multicast groups - uniq_groups = [] - for rp_addr in pim['pim']['rp']: - if not pim['pim']['rp'][rp_addr]: - raise ConfigError(f"Group should be specified for RP " + rp_addr) - for group in pim['pim']['rp'][rp_addr]: - if (group in uniq_groups): - raise ConfigError(f"Group range " + group + " specified cannot exact match another") + for interface in pim['interface']: + verify_interface_exists(interface) - # Check, is this multicast group - gr_addr = group.split('/') - if IPv4Address(gr_addr[0]) < IPv4Address('224.0.0.0'): - raise ConfigError(group + " not a multicast group") + if 'rp' in pim: + if 'address' not in pim['rp']: + raise ConfigError('PIM rendezvous point needs to be defined!') - uniq_groups.extend(pim['pim']['rp'][rp_addr]) + # Check unique multicast groups + unique = [] + pim_base_error = 'PIM rendezvous point group' + for address, address_config in pim['rp']['address'].items(): + if 'group' not in address_config: + raise ConfigError(f'{pim_base_error} should be defined for "{address}"!') + + # Check if it is a multicast group + for gr_addr in address_config['group']: + if not IPv4Network(gr_addr).is_multicast: + raise ConfigError(f'{pim_base_error} "{gr_addr}" is not a multicast group!') + if gr_addr in unique: + raise ConfigError(f'{pim_base_error} must be unique!') + unique.append(gr_addr) def generate(pim): - if pim is None: + if not pim or 'deleted' in pim: return None - - render(config_file, 'frr/pimd.frr.j2', pim) + pim['frr_pimd_config'] = render_to_string('frr/pimd.frr.j2', pim) return None def apply(pim): - if pim is None: + pim_daemon = 'pimd' + pim_pid = process_named_running(pim_daemon) + + if not pim or 'deleted' in pim: + if 'deleted' in pim: + os.kill(int(pim_pid), SIGTERM) + return None - pim_pid = process_named_running('pimd') - if pim['igmp_conf'] or pim['pim_conf']: - if not pim_pid: - call(pimd_cmd) + if not pim_pid: + call('/usr/lib/frr/pimd -d -F traditional --daemon -A 127.0.0.1') + + # Save original configuration prior to starting any commit actions + frr_cfg = frr.FRRConfig() + + frr_cfg.load_configuration(pim_daemon) + frr_cfg.modify_section(f'^ip pim') + frr_cfg.modify_section(f'^ip igmp') - if os.path.exists(config_file): - call("vtysh -d pimd -f " + config_file) - os.remove(config_file) - elif pim_pid: - os.kill(int(pim_pid), SIGTERM) + for key in ['interface', 'interface_removed']: + if key not in pim: + continue + for interface in pim[key]: + frr_cfg.modify_section(f'^interface {interface}', stop_pattern='^exit', remove_stop_mark=True) + if 'frr_pimd_config' in pim: + frr_cfg.add_before(frr.default_add_before, pim['frr_pimd_config']) + frr_cfg.commit_configuration(pim_daemon) return None if __name__ == '__main__': |