From c4218f5a26cbe04bed093f2b3bc9533a2f627d90 Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Fri, 1 May 2026 10:28:47 +0300
Subject: Update

---
 scripts/pihole-dns-toggle | 97 +++++++++++++++++++++++++++++++----------------
 1 file changed, 65 insertions(+), 32 deletions(-)

(limited to 'scripts/pihole-dns-toggle')

diff --git a/scripts/pihole-dns-toggle b/scripts/pihole-dns-toggle
index 1e3cc4d..74770b1 100755
--- a/scripts/pihole-dns-toggle
+++ b/scripts/pihole-dns-toggle
@@ -4,7 +4,7 @@
 set -e
 
 # Pi-hole DNS servers on the Raspberry Pi pair, with the router as last-resort fallback.
-PIHOLE_DNS="192.168.1.127 192.168.1.128 192.168.1.1"
+PIHOLE_DNS="192.168.1.127 192.168.1.128 192.168.1.101 192.168.1.1"
 
 # Colors for output
 GREEN='\033[0;32m'
@@ -12,44 +12,77 @@ YELLOW='\033[1;33m'
 RED='\033[0;31m'
 NC='\033[0m' # No Color
 
-# Get active connection name (excluding loopback)
-get_active_connection() {
-    nmcli -t -f NAME,DEVICE connection show --active | grep -v ':lo$' | head -1 | cut -d: -f1
+# Get active Ethernet/Wi-Fi connection names.
+get_active_connections() {
+    nmcli -t -f NAME,DEVICE,TYPE connection show --active | \
+        awk -F: '$2 != "lo" && ($3 == "802-3-ethernet" || $3 == "802-11-wireless") { print $1 }'
 }
 
 # Check if Pi-hole DNS is currently enabled
 is_pihole_enabled() {
     local connection="$1"
-    local ignore_auto_dns=$(nmcli -t -f ipv4.ignore-auto-dns connection show "$connection" | cut -d: -f2)
-    [[ "$ignore_auto_dns" == "yes" ]]
+    local ignore_auto_dns
+    local configured_dns
+
+    ignore_auto_dns=$(nmcli -g ipv4.ignore-auto-dns connection show "$connection")
+    configured_dns=$(nmcli -g ipv4.dns connection show "$connection" | tr ',' ' ')
+
+    [[ "$ignore_auto_dns" == "yes" && "$configured_dns" == "$PIHOLE_DNS" ]]
 }
 
 # Enable Pi-hole DNS
 enable_pihole() {
-    local connection="$1"
-    echo -e "${YELLOW}Enabling Pi-hole DNS for connection: $connection${NC}"
-    nmcli con mod "$connection" ipv4.dns "$PIHOLE_DNS"
-    nmcli con mod "$connection" ipv4.ignore-auto-dns yes
-    nmcli con up "$connection" > /dev/null 2>&1
+    local connection
+
+    for connection in "$@"; do
+        echo -e "${YELLOW}Enabling Pi-hole DNS for connection: $connection${NC}"
+        nmcli con mod "$connection" ipv4.dns "$PIHOLE_DNS"
+        nmcli con mod "$connection" ipv4.ignore-auto-dns yes
+        nmcli con up "$connection" > /dev/null 2>&1
+    done
+
     echo -e "${GREEN}✓ Pi-hole DNS enabled${NC}"
     echo "DNS servers: $PIHOLE_DNS"
 }
 
 # Disable Pi-hole DNS (use DHCP-provided DNS)
 disable_pihole() {
-    local connection="$1"
-    echo -e "${YELLOW}Disabling Pi-hole DNS for connection: $connection${NC}"
-    nmcli con mod "$connection" ipv4.dns ""
-    nmcli con mod "$connection" ipv4.ignore-auto-dns no
-    nmcli con up "$connection" > /dev/null 2>&1
+    local connection
+
+    for connection in "$@"; do
+        echo -e "${YELLOW}Disabling Pi-hole DNS for connection: $connection${NC}"
+        nmcli con mod "$connection" ipv4.dns ""
+        nmcli con mod "$connection" ipv4.ignore-auto-dns no
+        nmcli con up "$connection" > /dev/null 2>&1
+    done
+
     echo -e "${GREEN}✓ Pi-hole DNS disabled (using DHCP DNS)${NC}"
 }
 
+all_connections_pihole_enabled() {
+    local connection
+
+    for connection in "$@"; do
+        if ! is_pihole_enabled "$connection"; then
+            return 1
+        fi
+    done
+
+    return 0
+}
+
 # Show current DNS status
 show_status() {
-    local connection="$1"
     echo -e "\n${YELLOW}Current DNS configuration:${NC}"
-    nmcli dev show | grep "IP4.DNS" | head -4
+    nmcli dev show | awk -F: '
+        function trim(value) {
+            sub(/^[[:space:]]+/, "", value)
+            sub(/[[:space:]]+$/, "", value)
+            return value
+        }
+        /^GENERAL.DEVICE:/ { device=trim($2) }
+        /^IP4.DNS/ { print device ": " trim($2) }
+    '
 }
 
 # Check if running on Fedora
@@ -75,41 +108,41 @@ main() {
         exit 1
     fi
 
-    # Get active connection
-    CONNECTION=$(get_active_connection)
+    # Get active connections
+    mapfile -t CONNECTIONS < <(get_active_connections)
     
-    if [[ -z "$CONNECTION" ]]; then
+    if [[ "${#CONNECTIONS[@]}" -eq 0 ]]; then
         echo -e "${RED}Error: No active network connection found${NC}"
         exit 1
     fi
 
-    echo "Active connection: $CONNECTION"
+    echo "Active connections: ${CONNECTIONS[*]}"
 
     # Handle command-line arguments
     case "${1:-toggle}" in
         on|enable)
-            enable_pihole "$CONNECTION"
-            show_status "$CONNECTION"
+            enable_pihole "${CONNECTIONS[@]}"
+            show_status
             ;;
         off|disable)
-            disable_pihole "$CONNECTION"
-            show_status "$CONNECTION"
+            disable_pihole "${CONNECTIONS[@]}"
+            show_status
             ;;
         status)
-            if is_pihole_enabled "$CONNECTION"; then
+            if all_connections_pihole_enabled "${CONNECTIONS[@]}"; then
                 echo -e "${GREEN}Pi-hole DNS is currently ENABLED${NC}"
             else
                 echo -e "${YELLOW}Pi-hole DNS is currently DISABLED${NC}"
             fi
-            show_status "$CONNECTION"
+            show_status
             ;;
         toggle|*)
-            if is_pihole_enabled "$CONNECTION"; then
-                disable_pihole "$CONNECTION"
+            if all_connections_pihole_enabled "${CONNECTIONS[@]}"; then
+                disable_pihole "${CONNECTIONS[@]}"
             else
-                enable_pihole "$CONNECTION"
+                enable_pihole "${CONNECTIONS[@]}"
             fi
-            show_status "$CONNECTION"
+            show_status
             ;;
     esac
 }
-- 
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