route-update.sh: include gateway/table in hash, detect gateway changes

router/route-update.sh

@@ -188,8 +188,8 @@ process_routes()
             continue
         fi
 
-        # Compute hash of all list contents
-        local current_hash=$(md5_lists $lists)
+        # Compute hash of all list contents + gateway + table
+        local current_hash=$(md5_lists "$gwdir/gateway" "$gwdir/table" $lists)
 
         if [ -z "$FORCE" ] && [ -f "$STATE_DIR/$state/hash" ] ; then
             local saved_hash
@@ -228,11 +228,15 @@ process_routes()
         # Check if resolved IPs actually changed
         if [ -z "$FORCE" ] && [ -f "$STATE_DIR/$state/resolved" ] ; then
             if diff -q "$STATE_DIR/$state/resolved" "$resolved_new" >/dev/null 2>&1 ; then
+                # IPs same, but gateway may have changed
+                if [ -f "$STATE_DIR/$state/gateway" ] && diff -q "$STATE_DIR/$state/gateway" "$gwdir/gateway" >/dev/null 2>&1 ; then
                     log "[$name]$label Resolved IPs unchanged, updating hash only"
                     echo "$current_hash" > "$STATE_DIR/$state/hash"
                     rm -f "$resolved_new"
                     continue
                 fi
+                log "[$name]$label Gateway changed, reloading routes"
+            fi
         fi
 
         local count=$(wc -l < "$resolved_new")
@@ -260,6 +264,7 @@ process_routes()
         # Save state
         echo "$current_hash" > "$STATE_DIR/$state/hash"
         echo "$table" > "$STATE_DIR/$state/table"
+        cp "$gwdir/gateway" "$STATE_DIR/$state/gateway"
         mv "$resolved_new" "$STATE_DIR/$state/resolved"
 
         log "[$name]$label Done"