wwan: T3622: add support for APN authentication

Some APNs require a username/password. Add CLI nodes (matching the PPPoE
syntax) for client authentication.

One APN would be the IPv4/IPv6 APN from Deutsche Telekom (Germany)

APN Name: Telekom Internet IPv6
APN: internet.v6.telekom
Benutzername: telekom
Passwort: tm

4 files changed, 38 insertions, 19 deletions

diff --git a/interface-definitions/include/interface/authentication.xml.i b/interface-definitions/include/interface/authentication.xml.i
new file mode 100644
index 000000000..c097ca9dd
--- /dev/null
+++ b/interface-definitions/include/interface/authentication.xml.i
@@ -0,0 +1,27 @@
+<!-- include start from interface/authentication.xml.i -->
+<node name="authentication">
+  <properties>
+    <help>Authentication settings</help>
+  </properties>
+  <children>
+    <leafNode name="user">
+      <properties>
+        <help>User name</help>
+        <valueHelp>
+          <format>txt</format>
+          <description>Username used for connection</description>
+        </valueHelp>
+      </properties>
+    </leafNode>
+    <leafNode name="password">
+      <properties>
+        <help>Password</help>
+        <valueHelp>
+          <format>txt</format>
+          <description>Password used for connection</description>
+        </valueHelp>
+      </properties>
+    </leafNode>
+  </children>
+</node>
+<!-- include end -->
diff --git a/interface-definitions/interfaces-pppoe.xml.in b/interface-definitions/interfaces-pppoe.xml.in
index beb5ab4ed..975c0ff9a 100644
--- a/interface-definitions/interfaces-pppoe.xml.in
+++ b/interface-definitions/interfaces-pppoe.xml.in
@@ -25,23 +25,7 @@
               <constraintErrorMessage>Access concentrator name must be composed of uppper and lower case letters or numbers only</constraintErrorMessage>
             </properties>
           </leafNode>
-          <node name="authentication">
-            <properties>
-              <help>Authentication settings</help>
-            </properties>
-            <children>
-              <leafNode name="user">
-                <properties>
-                  <help>User name</help>
-                </properties>
-              </leafNode>
-              <leafNode name="password">
-                <properties>
-                  <help>Password</help>
-                </properties>
-              </leafNode>
-            </children>
-          </node>
+          #include <include/interface/authentication.xml.i>
           #include <include/interface/interface-dial-on-demand.xml.i>
           <leafNode name="default-route">
             <properties>
diff --git a/interface-definitions/interfaces-wwan.xml.in b/interface-definitions/interfaces-wwan.xml.in
index 5afdedf9b..5d899a280 100644
--- a/interface-definitions/interfaces-wwan.xml.in
+++ b/interface-definitions/interfaces-wwan.xml.in
@@ -25,6 +25,7 @@
               <help>Access Point Name (APN)</help>
             </properties>
           </leafNode>
+          #include <include/interface/authentication.xml.i>
           #include <include/dhcp-options.xml.i>
           #include <include/dhcpv6-options.xml.i>
           #include <include/interface/interface-description.xml.i>
diff --git a/src/conf_mode/interfaces-wwan.py b/src/conf_mode/interfaces-wwan.py
index 02d2c723d..a477163b9 100755
--- a/src/conf_mode/interfaces-wwan.py
+++ b/src/conf_mode/interfaces-wwan.py
@@ -20,6 +20,7 @@ from sys import exit
 
 from vyos.config import Config
 from vyos.configdict import get_interface_dict
+from vyos.configverify import verify_authentication
 from vyos.configverify import verify_interface_exists
 from vyos.configverify import verify_vrf
 from vyos.ifconfig import WWANIf
@@ -52,6 +53,7 @@ def verify(wwan):
         raise ConfigError(f'No APN configured for "{ifname}"!')
 
     verify_interface_exists(ifname)
+    verify_authentication(wwan)
     verify_vrf(wwan)
 
     return None
@@ -61,7 +63,7 @@ def generate(wwan):
 
 def apply(wwan):
     # we only need the modem number. wwan0 -> 0, wwan1 -> 1
-    modem = wwan['ifname'].replace('wwan','')
+    modem = wwan['ifname'].lstrip('wwan')
     base_cmd = f'mmcli --modem {modem}'
 
     w = WWANIf(wwan['ifname'])
@@ -70,7 +72,12 @@ def apply(wwan):
         cmd(f'{base_cmd} --simple-disconnect')
         return None
 
-    cmd(f'{base_cmd} --simple-connect=\"apn={wwan["apn"]}\"')
+    options = 'apn=' + wwan['apn']
+    if 'authentication' in wwan:
+        options += ',user={user},password={password}'.format(**wwan['authentication'])
+
+    command = f'{base_cmd} --simple-connect="{options}"'
+    cmd(command)
     w.update(wwan)
 
     return None