route-update.sh: skip re-resolve when only gateway/options changed

router/route-update.sh

@@ -337,8 +337,10 @@ process_routes()
             fi
         fi
 
-        # Compute hash of all list contents + gateway + options
+        # Compute hashes: lists only (for resolve skip) and full (for change detect)
+        local lists_hash=$(md5_lists $lists)
         local current_hash=$(md5_lists "$gwdir/gateway" "$gwdir/options" $lists)
+        local need_reload= need_resolve=1
 
         if [ -z "$FORCE" ] && [ -z "$RESOLVE" ] && [ -f "$STATE_DIR/$state/hash" ] ; then
             local saved_hash
@@ -346,7 +348,6 @@ process_routes()
             vlog "[$name]$label hash: saved=$saved_hash current=$current_hash"
             if [ "$current_hash" = "$saved_hash" ] ; then
                 # Check if rules/routes were lost (e.g. after network restart)
-                local need_reload=
                 local rule_count=$($ipcmd -N rule show | grep -c "lookup $table")
                 local route_count=$($ipcmd route show table "$table" 2>/dev/null | wc -l)
                 vlog "[$name]$label hash match, checking state: rules=$rule_count routes=$route_count"
@@ -375,6 +376,19 @@ process_routes()
             vlog "[$name]$label state: force=$FORCE resolve=$RESOLVE hash_exists=$([ -f "$STATE_DIR/$state/hash" ] && echo yes || echo no)"
         fi
 
+        # Skip re-resolve if only gateway/options changed (lists unchanged)
+        local resolved_new="$STATE_DIR/$state/resolved.new"
+        if [ -z "$FORCE" ] && [ -z "$RESOLVE" ] && [ -f "$STATE_DIR/$state/lists_hash" ] && [ -f "$STATE_DIR/$state/resolved" ] ; then
+            local saved_lists_hash
+            read -r saved_lists_hash < "$STATE_DIR/$state/lists_hash"
+            if [ "$saved_lists_hash" = "$lists_hash" ] ; then
+                need_resolve=
+                cp "$STATE_DIR/$state/resolved" "$resolved_new"
+                log "[$name]$label Gateway/options changed, reusing resolved IPs"
+            fi
+        fi
+
+        if [ -n "$need_resolve" ] ; then
             if [ -n "$RESOLVE" ] ; then
                 log "[$name]$label Re-resolving..."
             else
@@ -382,7 +396,6 @@ process_routes()
             fi
 
             # Split: pure IP files go through cat, domain files through resolve
-        local resolved_new="$STATE_DIR/$state/resolved.new"
             local ip_lists="" domain_lists=""
             for f in $lists ; do
                 if grep -v '^#' "$f" | grep -q '[a-zA-Z]' ; then
@@ -409,6 +422,7 @@ process_routes()
                         grep -v '^#' | grep -v '^$'
                 fi
             } | sort -u > "$resolved_new"
+        fi
 
         # Check if resolved IPs actually changed
         vlog "[$name]$label resolved $(wc -l < "$resolved_new") IPs, checking against saved state"
@@ -462,6 +476,7 @@ process_routes()
 
         # Save state
         echo "$current_hash" > "$STATE_DIR/$state/hash"
+        echo "$lists_hash" > "$STATE_DIR/$state/lists_hash"
         echo "$table" > "$STATE_DIR/$state/table"
         cp "$gwdir/gateway" "$STATE_DIR/$state/gateway"
         mv "$resolved_new" "$STATE_DIR/$state/resolved"