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-rwxr-xr-xsrc/conf_mode/igmp_proxy.py179
1 files changed, 179 insertions, 0 deletions
diff --git a/src/conf_mode/igmp_proxy.py b/src/conf_mode/igmp_proxy.py
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+++ b/src/conf_mode/igmp_proxy.py
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+#!/usr/bin/env python3
+#
+# Copyright (C) 2018 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 os
+import jinja2
+
+from vyos.config import Config
+from vyos import ConfigError
+
+config_file = r'/etc/igmpproxy.conf'
+
+# Please be careful if you edit the template.
+config_tmpl = """
+########################################################
+#
+# autogenerated by igmp_proxy.py
+#
+# The configuration file must define one upstream
+# interface, and one or more downstream interfaces.
+#
+# If multicast traffic originates outside the
+# upstream subnet, the "altnet" option can be
+# used in order to define legal multicast sources.
+# (Se example...)
+#
+# The "quickleave" should be used to avoid saturation
+# of the upstream link. The option should only
+# be used if it's absolutely nessecary to
+# accurately imitate just one Client.
+#
+########################################################
+
+{% if not disable_quickleave -%}
+quickleave
+{% endif -%}
+
+{% for i in interface %}
+# Configuration for {{ i.interface }} ({{ i.role }} interface)
+{% if i.role == 'disabled' -%}
+phyint {{ i.interface }} disabled
+{%- else -%}
+phyint {{ i.interface }} {{ i.role }} ratelimit 0 threshold {{ i.threshold }}
+{%- endif -%}
+{%- for subnet in i.alt_subnet %}
+ altnet {{ subnet }}
+{%- endfor %}
+{%- for subnet in i.whitelist %}
+ whitelist {{ subnet }}
+{%- endfor %}
+{% endfor %}
+"""
+
+default_config_data = {
+ 'disable': False,
+ 'disable_quickleave': False,
+ 'interface': [],
+}
+
+def get_config():
+ igmp_proxy = default_config_data
+ conf = Config()
+ if not conf.exists('protocols igmp-proxy'):
+ return None
+ else:
+ conf.set_level('protocols igmp-proxy')
+
+ # Network interfaces to listen on
+ if conf.exists('disable'):
+ igmp_proxy['disable'] = True
+
+ # Option to disable "quickleave"
+ if conf.exists('disable-quickleave'):
+ igmp_proxy['disable_quickleave'] = True
+
+ for intf in conf.list_nodes('interface'):
+ conf.set_level('protocols igmp-proxy interface {0}'.format(intf))
+ interface = {
+ 'interface': intf,
+ 'alt_subnet': [],
+ 'role': 'downstream',
+ 'threshold': '1',
+ 'whitelist': []
+ }
+
+ if conf.exists('alt-subnet'):
+ interface['alt_subnet'] = conf.return_values('alt-subnet')
+
+ if conf.exists('role'):
+ interface['role'] = conf.return_value('role')
+
+ if conf.exists('threshold'):
+ interface['threshold'] = conf.return_value('threshold')
+
+ if conf.exists('whitelist'):
+ interface['whitelist'] = conf.return_values('whitelist')
+
+ # Append interface configuration to global configuration list
+ igmp_proxy['interface'].append(interface)
+
+ return igmp_proxy
+
+def verify(igmp_proxy):
+ # bail out early - looks like removal from running config
+ if igmp_proxy is None:
+ return None
+
+ # bail out early - service is disabled
+ if igmp_proxy['disable']:
+ return None
+
+ # at least two interfaces are required, one upstream and one downstream
+ if len(igmp_proxy['interface']) < 2:
+ raise ConfigError('Must define an upstream and at least 1 downstream interface!')
+
+ upstream = 0
+ for i in igmp_proxy['interface']:
+ if "upstream" == i['role']:
+ upstream += 1
+
+ if upstream == 0:
+ raise ConfigError('At least 1 upstream interface is required!')
+ elif upstream > 1:
+ raise ConfigError('Only 1 upstream interface allowed!')
+
+ return None
+
+def generate(igmp_proxy):
+ # bail out early - looks like removal from running config
+ if igmp_proxy is None:
+ return None
+
+ # bail out early - service is disabled, but inform user
+ if igmp_proxy['disable']:
+ print('Warning: IGMP Proxy will be deactivated because it is disabled')
+ return None
+
+ tmpl = jinja2.Template(config_tmpl)
+ config_text = tmpl.render(igmp_proxy)
+ with open(config_file, 'w') as f:
+ f.write(config_text)
+
+ return None
+
+def apply(igmp_proxy):
+ if igmp_proxy is None or igmp_proxy['disable']:
+ # IGMP Proxy support is removed in the commit
+ os.system('sudo systemctl stop igmpproxy.service')
+ if os.path.exists(config_file):
+ os.unlink(config_file)
+ else:
+ os.system('sudo systemctl restart igmpproxy.service')
+
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ sys.exit(1)