T7965: reapply the QoS policy when the interface reconnect

src/etc/ppp/ip-up.d/99-vyos-ppp-callback

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+interface=$6
+if [ -z "$interface" ]; then
+    exit
+fi
+
+# 1. Handle sstpc interface callback
+if [[ "$interface" == sstpc* ]]; then
+    /etc/ppp/ip-up.d/ppp-hook-scripts/96-vyos-sstpc-callback "$@"
+fi
+
+# 2. Configure DNS via vyos-hostsd if active
+hostsd_client="/usr/bin/vyos-hostsd-client"
+hostsd_active=false
+
+if /usr/bin/systemctl -q is-active vyos-hostsd; then
+    hostsd_active=true
+fi
+
+if $hostsd_active; then
+    $hostsd_client --delete-name-servers --tag "dhcp-$interface"
+
+    if [ "$USEPEERDNS" ] && [ -n "$DNS1" ]; then
+        $hostsd_client --add-name-servers "$DNS1" --tag "dhcp-$interface"
+    fi
+
+    if [ "$USEPEERDNS" ] && [ -n "$DNS2" ]; then
+        $hostsd_client --add-name-servers "$DNS2" --tag "dhcp-$interface"
+    fi
+
+    $hostsd_client --apply
+fi
+
+# 3. Handle pppoe interface callbacks
+if [[ "$interface" == pppoe* ]]; then
+    /etc/ppp/ip-up.d/ppp-hook-scripts/99-vyos-pppoe-callback "$@"
+    /etc/ppp/ip-up.d/ppp-hook-scripts/99-vyos-pppoe-qos "$@"
+fi
+
+# 4. Handle WLB callback if wlb daemon is running
+WLB_PID_FILE="/run/wlb_daemon.pid"
+if [ -f "$WLB_PID_FILE" ]; then
+    /etc/ppp/ip-up.d/ppp-hook-scripts/99-vyos-pppoe-wlb "$@"
+fi

src/etc/ppp/ip-up.d/ppp-hook-scripts/99-vyos-pppoe-qos

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+
+# Dynamic interfaces may lose QoS config on reconnect.
+# This script reapplies the QoS policy when the interface comes up.
+
+from sys import argv
+from sys import exit
+from vyos.utils.process import call
+from vyos.configquery import ConfigTreeQuery
+
+# When the ppp link comes up, this script is called with the following
+# parameters
+#       $1      the interface name used by pppd (e.g., pppoe0, l2tpc0, sstpc0)
+#       $2      the tty device name
+#       $3      the tty device speed
+#       $4      the local IP address for the interface
+#       $5      the remote IP address
+#       $6      the parameter specified by the 'ipparam' option to pppd
+
+if len(argv) < 7:
+    exit(1)
+
+interface = argv[6]
+
+conf = ConfigTreeQuery()
+
+try:
+    # Check if QoS is configured for the interface
+    qos_path = ['qos', 'interface', interface]
+    if conf.exists(qos_path):
+        call('/usr/libexec/vyos/conf_mode/qos.py')
+except Exception:
+    exit(1)