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-rw-r--r--interface-definitions/interfaces-loopback.xml46
-rwxr-xr-xsrc/conf_mode/interface-loopback.py102
2 files changed, 148 insertions, 0 deletions
diff --git a/interface-definitions/interfaces-loopback.xml b/interface-definitions/interfaces-loopback.xml
new file mode 100644
index 000000000..267731b1c
--- /dev/null
+++ b/interface-definitions/interfaces-loopback.xml
@@ -0,0 +1,46 @@
+<?xml version="1.0"?>
+<interfaceDefinition>
+ <node name="interfaces">
+ <children>
+ <tagNode name="loopback" owner="${vyos_conf_scripts_dir}/interface-loopback.py">
+ <properties>
+ <help>Loopback interface</help>
+ <priority>300</priority>
+ <constraint>
+ <regex>lo$</regex>
+ </constraint>
+ <constraintErrorMessage>Loopback interface must be named lo</constraintErrorMessage>
+ <valueHelp>
+ <format>lo</format>
+ <description>Loopback interface</description>
+ </valueHelp>
+ </properties>
+ <children>
+ <leafNode name="address">
+ <properties>
+ <help>IP address</help>
+ <valueHelp>
+ <format>ipv4net</format>
+ <description>IPv4 address and prefix length</description>
+ </valueHelp>
+ <valueHelp>
+ <format>ipv6net</format>
+ <description>IPv6 address and prefix length</description>
+ </valueHelp>
+ <multi/>
+ </properties>
+ </leafNode>
+ <leafNode name="description">
+ <properties>
+ <help>Interface description</help>
+ <constraint>
+ <regex>^.{1,256}$</regex>
+ </constraint>
+ <constraintErrorMessage>Interface description too long (limit 256 characters)</constraintErrorMessage>
+ </properties>
+ </leafNode>
+ </children>
+ </tagNode>
+ </children>
+ </node>
+</interfaceDefinition>
diff --git a/src/conf_mode/interface-loopback.py b/src/conf_mode/interface-loopback.py
new file mode 100755
index 000000000..445a9af64
--- /dev/null
+++ b/src/conf_mode/interface-loopback.py
@@ -0,0 +1,102 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2019 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
+import sys
+import copy
+
+import vyos.configinterface as VyIfconfig
+
+from vyos.config import Config
+from vyos import ConfigError
+
+default_config_data = {
+ 'address': [],
+ 'address_remove': [],
+ 'deleted': False,
+ 'description': '',
+}
+
+def diff(first, second):
+ second = set(second)
+ return [item for item in first if item not in second]
+
+def get_config():
+ loopback = copy.deepcopy(default_config_data)
+ conf = Config()
+
+ # determine tagNode instance
+ try:
+ loopback['intf'] = os.environ['VYOS_TAGNODE_VALUE']
+ except KeyError as E:
+ print("Interface not specified")
+
+ # Check if interface has been removed
+ if not conf.exists('interfaces loopback ' + loopback['intf']):
+ loopback['deleted'] = True
+
+ # set new configuration level
+ conf.set_level('interfaces loopback ' + loopback['intf'])
+
+ # retrieve configured interface addresses
+ if conf.exists('address'):
+ loopback['address'] = conf.return_values('address')
+
+ # retrieve interface description
+ if conf.exists('description'):
+ loopback['description'] = conf.return_value('description')
+
+ # Determine interface addresses (currently effective) - to determine which
+ # address is no longer valid and needs to be removed from the interface
+ eff_addr = conf.return_effective_values('address')
+ act_addr = conf.return_values('address')
+ loopback['address_remove'] = diff(eff_addr, act_addr)
+
+ return loopback
+
+def verify(loopback):
+ return None
+
+def generate(loopback):
+ return None
+
+def apply(loopback):
+ # Remove loopback interface
+ if not loopback['deleted']:
+ # update interface description used e.g. within SNMP
+ VyIfconfig.set_description(loopback['intf'], loopback['description'])
+
+ # Configure interface address(es)
+ for addr in loopback['address']:
+ VyIfconfig.add_interface_address(loopback['intf'], addr)
+
+ # Remove interface address(es)
+ for addr in loopback['address_remove']:
+ VyIfconfig.remove_interface_address(loopback['intf'], addr)
+
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ sys.exit(1)