pim: T1729: Add PIM and IGMPv2/v3 support

1 files changed, 158 insertions, 0 deletions

diff --git a/src/conf_mode/protocols_igmp.py b/src/conf_mode/protocols_igmp.py
new file mode 100755
index 000000000..983ca4c3a
--- /dev/null
+++ b/src/conf_mode/protocols_igmp.py
@@ -0,0 +1,158 @@
+#!/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 jinja2
+import copy
+import os
+import vyos.validate
+from ipaddress import IPv4Address
+from sys import exit
+
+from vyos import ConfigError
+from vyos.config import Config
+
+config_file = r'/tmp/igmp.frr'
+
+config_tmpl = """
+!
+{% for iface in old_ifaces -%}
+interface {{ iface }}
+{% for group in old_ifaces[iface].gr_join -%}
+{% if old_ifaces[iface].gr_join[group] -%}
+{% for source in old_ifaces[iface].gr_join[group] -%}
+no ip igmp join {{ group }} {{ source }}
+{% endfor -%}
+{% else -%}
+no ip igmp join {{ group }}
+{% endif -%}
+{% endfor -%}
+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 -%}
+{% for group in ifaces[iface].gr_join -%}
+{% if ifaces[iface].gr_join[group] -%}
+{% for source in ifaces[iface].gr_join[group] -%}
+ip igmp join {{ group }} {{ source }}
+{% endfor -%}
+{% else -%}
+ip igmp join {{ group }}
+{% endif -%}
+{% endfor -%}
+!
+{% 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)),
+                'gr_join' : {}
+            }
+        })
+        for gr_join in conf.list_effective_nodes('interface {0} join'.format(iface)):
+            igmp_conf['old_ifaces'][iface]['gr_join'][gr_join] = conf.return_effective_values('interface {0} join {1} source'.format(iface, gr_join))
+
+    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)),
+                'gr_join' : {}
+            }
+        })
+        for gr_join in conf.list_nodes('interface {0} join'.format(iface)):
+            igmp_conf['ifaces'][iface]['gr_join'][gr_join] = conf.return_values('interface {0} join {1} source'.format(iface, gr_join))
+
+    return igmp_conf
+
+def verify(igmp):
+    if igmp is None:
+        return None
+
+    if igmp['igmp_conf']:
+        # Check interfaces
+        if not igmp['ifaces']:
+            raise ConfigError("IGMP require defined interfaces!")
+        # Check, is this multicast group
+        for intfc in igmp['ifaces']:
+            for gr_addr in igmp['ifaces'][intfc]['gr_join']:
+                if IPv4Address(gr_addr) < IPv4Address('224.0.0.0'):
+                    raise ConfigError(gr_addr + " not a multicast group")
+
+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)
+        exit(1)