wwan: T1988: initial XML/Python representation

interface-definitions/interfaces-wirelessmodem.xml.in

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+<?xml version="1.0"?>
+<interfaceDefinition>
+  <node name="interfaces">
+    <children>
+      <tagNode name="wirelessmodem" owner="${vyos_conf_scripts_dir}/interfaces-wirelessmodem.py">
+        <properties>
+          <help>Wireless Modem (WWAN) Interface</help>
+          <priority>350</priority>
+          <constraint>
+            <regex>wlm[0-9]+$</regex>
+          </constraint>
+          <constraintErrorMessage>Wireless Modem interface must be named wlmN</constraintErrorMessage>
+          <valueHelp>
+            <format>wlmN</format>
+            <description>Wireless modem interface name</description>
+          </valueHelp>
+        </properties>
+        <children>
+          <node name="backup">
+            <properties>
+              <help>Insert backup default route</help>
+            </properties>
+            <children>
+              <leafNode name="distance">
+                <properties>
+                  <help>Distance backup default route</help>
+                  <valueHelp>
+                    <format>1-255</format>
+                    <description>Distance of the backup route (default: 10) </description>
+                  </valueHelp>
+                  <constraint>
+                    <validator name="numeric" argument="--range 1-255"/>
+                  </constraint>
+                  <constraintErrorMessage>Must be between (1-255)</constraintErrorMessage>
+                </properties>
+              </leafNode>
+            </children>
+          </node>
+          #include <include/interface-description.xml.i>
+          <leafNode name="device">
+            <properties>
+              <help>System device name (default: ttyUSB0)</help>
+              <valueHelp>
+                <format>&gt;ttyXXX%lt;</format>
+                <description>System TTY device name</description>
+              </valueHelp>
+            </properties>
+          </leafNode>
+          #include <include/interface-disable-link-detect.xml.i>
+          #include <include/interface-mtu-68-9000.xml.i>
+          <leafNode name="network">
+            <properties>
+              <help>Carrier network to define dial strings</help>
+              <completionHelp>
+                <script>ls /opt/vyatta/share/ppp/network/</script>
+              </completionHelp>
+            </properties>
+          </leafNode>
+          <leafNode name="no-dns">
+            <properties>
+              <help>Do not use peer supplied DNS server information</help>
+            </properties>
+          </leafNode>
+          <leafNode name="ondemand">
+            <properties>
+              <help>Only dial when traffic is available</help>
+            </properties>
+          </leafNode>
+        </children>
+      </tagNode>
+    </children>
+  </node>
+</interfaceDefinition>

src/conf_mode/interfaces-wirelessmodem.py

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+#!/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 os
+
+from sys import exit
+from copy import deepcopy
+
+from vyos.config import Config
+from vyos import ConfigError
+
+default_config_data = {
+    'address': [],
+    'deleted': False,
+    'description': '',
+    'disable': False
+}
+
+def get_config():
+    wwan = deepcopy(default_config_data)
+    conf = Config()
+
+    # determine tagNode instance
+    try:
+        wwan['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 wirelessmodem ' + wwan['intf']):
+        vxlan['deleted'] = True
+        return vxlan
+
+    # set new configuration level
+    conf.set_level('interfaces wirelessmodem ' + wwan['intf'])
+
+    tmp = conf.get_config_dict()
+
+    import pprint
+    pprint.pprint(tmp)
+
+    return wwan
+
+def verify(wwan):
+    if wwan is None:
+        return None
+
+    return None
+
+def generate(wwan):
+    if wwan is None:
+        return None
+
+    return None
+
+def apply(wwan):
+    if wwan is None:
+        return None
+
+    return None
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        exit(1)