From 4aafa362d90804d211a6e15a8175df0ec38fcd69 Mon Sep 17 00:00:00 2001
From: DmitriyEshenko <dmitriy.eshenko@vyos.io>
Date: Thu, 26 Mar 2020 18:00:15 +0000
Subject: pim: T1729: Basic PIM implementation
---
src/conf_mode/protocols_igmp.py | 130 +++++++++++++++++++++++++++++
src/conf_mode/protocols_pim.py | 175 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 305 insertions(+)
create mode 100755 src/conf_mode/protocols_igmp.py
create mode 100755 src/conf_mode/protocols_pim.py
(limited to 'src')
diff --git a/src/conf_mode/protocols_igmp.py b/src/conf_mode/protocols_igmp.py
new file mode 100755
index 000000000..8d25fe9d5
--- /dev/null
+++ b/src/conf_mode/protocols_igmp.py
@@ -0,0 +1,130 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2020 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 sys
+import jinja2
+import copy
+import os
+import vyos.validate
+
+from vyos import ConfigError
+from vyos.config import Config
+
+config_file = r'/tmp/igmp.frr'
+
+# Please be careful if you edit the template.
+config_tmpl = """
+!
+{% for iface in old_ifaces -%}
+interface {{ iface }}
+no ip igmp
+!
+{% endfor -%}
+{% for iface in ifaces -%}
+interface {{ iface }}
+{% if ifaces[iface].version -%}
+ip igmp version {{ ifaces[iface].version }}
+{% else -%}
+{# IGMP default version 3 #}
+ip igmp
+{% endif -%}
+{% if ifaces[iface].query_interval -%}
+ip igmp query-interval {{ ifaces[iface].query_interval }}
+{% endif -%}
+{% if ifaces[iface].query_max_resp_time -%}
+ip igmp query-max-response-time {{ ifaces[iface].query_max_resp_time }}
+{% endif -%}
+!
+{% endfor -%}
+!
+"""
+
+def get_config():
+ conf = Config()
+ igmp_conf = {
+ 'igmp_conf' : False,
+ 'old_ifaces' : {},
+ 'ifaces' : {}
+ }
+ if not (conf.exists('protocols igmp') or conf.exists_effective('protocols igmp')):
+ return None
+
+ if conf.exists('protocols igmp'):
+ igmp_conf['igmp_conf'] = True
+
+ conf.set_level('protocols igmp')
+
+ # # Get interfaces
+ for iface in conf.list_effective_nodes('interface'):
+ igmp_conf['old_ifaces'].update({
+ iface : {
+ 'version' : conf.return_effective_value('interface {0} version'.format(iface)),
+ 'query_interval' : conf.return_effective_value('interface {0} query-interval'.format(iface)),
+ 'query_max_resp_time' : conf.return_effective_value('interface {0} query-max-response-time'.format(iface))
+ }
+ })
+
+ for iface in conf.list_nodes('interface'):
+ igmp_conf['ifaces'].update({
+ iface : {
+ 'version' : conf.return_value('interface {0} version'.format(iface)),
+ 'query_interval' : conf.return_value('interface {0} query-interval'.format(iface)),
+ 'query_max_resp_time' : conf.return_value('interface {0} query-max-response-time'.format(iface))
+ }
+ })
+
+ return igmp_conf
+
+def verify(igmp):
+ if igmp is None:
+ return None
+
+ if igmp['igmp_conf']:
+ # Check interfaces
+ if not igmp['ifaces']:
+ raise ConfigError(f"IGMP require defined interfaces!")
+
+def generate(igmp):
+ if igmp is None:
+ return None
+
+ tmpl = jinja2.Template(config_tmpl)
+ config_text = tmpl.render(igmp)
+ with open(config_file, 'w') as f:
+ f.write(config_text)
+
+ return None
+
+def apply(igmp):
+ if igmp is None:
+ return None
+
+ if os.path.exists(config_file):
+ os.system("sudo vtysh -d pimd -f " + config_file)
+ os.remove(config_file)
+
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ sys.exit(1)
diff --git a/src/conf_mode/protocols_pim.py b/src/conf_mode/protocols_pim.py
new file mode 100755
index 000000000..dc65a59a6
--- /dev/null
+++ b/src/conf_mode/protocols_pim.py
@@ -0,0 +1,175 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2020 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 sys
+import jinja2
+import copy
+import os
+import vyos.validate
+from ipaddress import IPv4Address
+
+from vyos import ConfigError
+from vyos.config import Config
+
+config_file = r'/tmp/pimd.frr'
+
+# Please be careful if you edit the template.
+config_tmpl = """
+!
+{% for rp_addr in old_pim.rp -%}
+{% for group in old_pim.rp[rp_addr] -%}
+no ip pim rp {{ rp_addr }} {{ group }}
+{% endfor -%}
+{% endfor -%}
+{% if old_pim.rp_keep_alive -%}
+no ip pim rp keep-alive-timer {{ old_pim.rp_keep_alive }}
+{% endif -%}
+{% for iface in old_pim.ifaces -%}
+interface {{ iface }}
+no ip pim
+!
+{% endfor -%}
+{% for iface in pim.ifaces -%}
+interface {{ iface }}
+{% if pim.ifaces[iface].hello -%}
+ip pim hello {{ pim.ifaces[iface].hello }}
+{% endif -%}
+ip pim
+!
+{% endfor -%}
+{% for rp_addr in pim.rp -%}
+{% for group in pim.rp[rp_addr] -%}
+ip pim rp {{ rp_addr }} {{ group }}
+{% endfor -%}
+{% endfor -%}
+{% if pim.rp_keep_alive -%}
+ip pim rp keep-alive-timer {{ pim.rp_keep_alive }}
+{% endif -%}
+!
+"""
+
+def get_config():
+ conf = Config()
+ pim_conf = {
+ 'pim_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 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))
+ }
+ })
+
+ for iface in conf.list_nodes('interface'):
+ pim_conf['pim']['ifaces'].update({
+ iface : {
+ 'hello' : conf.return_value('interface {0} hello'.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
+
+def verify(pim):
+ if pim is None:
+ return None
+
+ if pim['pim_conf']:
+ # Check interfaces
+ if not pim['pim']['ifaces']:
+ raise ConfigError(f"PIM require defined interfaces!")
+
+ if not pim['pim']['rp']:
+ raise ConfigError(f"RP address required")
+
+ # 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")
+
+ # 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")
+
+ uniq_groups.extend(pim['pim']['rp'][rp_addr])
+
+def generate(pim):
+ if pim is None:
+ return None
+
+ tmpl = jinja2.Template(config_tmpl)
+ config_text = tmpl.render(pim)
+ with open(config_file, 'w') as f:
+ f.write(config_text)
+
+ return None
+
+def apply(pim):
+ if pim is None:
+ return None
+
+ if os.path.exists(config_file):
+ os.system("sudo vtysh -d pimd -f " + config_file)
+ os.remove(config_file)
+
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ sys.exit(1)
--
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