add osrm-routed and node-osrm flags to configure mapmatching radius limit (#4721)

src/engine/engine_config.cpp

@@ -11,12 +11,13 @@ bool EngineConfig::IsValid() const
     // leads to an empty path
     const bool all_path_are_empty = storage_config.GetPath("").empty();
 
-    const auto unlimited_or_more_than = [](const int v, const int limit) {
+    const auto unlimited_or_more_than = [](const auto v, const auto limit) {
         return v == -1 || v > limit;
     };
 
     const bool limits_valid = unlimited_or_more_than(max_locations_distance_table, 2) &&
                               unlimited_or_more_than(max_locations_map_matching, 2) &&
+                              unlimited_or_more_than(max_radius_map_matching, 0) &&
                               unlimited_or_more_than(max_locations_trip, 2) &&
                               unlimited_or_more_than(max_locations_viaroute, 2) &&
                               unlimited_or_more_than(max_results_nearest, 0) &&

src/engine/plugins/match.cpp

@@ -139,6 +139,17 @@ Status MatchPlugin::HandleRequest(const RoutingAlgorithmsInterface &algorithms,
         return Error("InvalidValue", "Invalid coordinate value.", json_result);
     }
 
+    if (max_radius_map_matching > 0 && std::any_of(parameters.radiuses.begin(),
+                                                   parameters.radiuses.end(),
+                                                   [&](const auto &radius) {
+                                                       if (!radius)
+                                                           return false;
+                                                       return *radius > max_radius_map_matching;
+                                                   }))
+    {
+        return Error("TooBig", "Radius search size is too large for map matching.", json_result);
+    }
+
     // Check for same or increasing timestamps. Impl. note: Incontrast to `sort(first,
     // last, less_equal)` checking `greater` in reverse meets irreflexive requirements.
     const auto time_increases_monotonically = std::is_sorted(

src/nodejs/node_osrm.cpp

@@ -76,8 +76,9 @@ NAN_MODULE_INIT(Engine::Init)
  * @param {Number} [options.max_locations_viaroute] Max. locations supported in viaroute query (default: unlimited).
  * @param {Number} [options.max_locations_distance_table] Max. locations supported in distance table query (default: unlimited).
  * @param {Number} [options.max_locations_map_matching] Max. locations supported in map-matching query (default: unlimited).
+ * @param {Number} [options.max_radius_map_matching] Max. radius size supported in map matching query (default: 5).
  * @param {Number} [options.max_results_nearest] Max. results supported in nearest query (default: unlimited).
- * @param {Number} [options.max_alternatives] Max.number of alternatives supported in alternative routes query (default: 3).
+ * @param {Number} [options.max_alternatives] Max. number of alternatives supported in alternative routes query (default: 3).
  *
  * @class OSRM
  *

src/tools/routed.cpp

@@ -133,7 +133,10 @@ inline unsigned generateServerProgramOptions(const int argc,
          "Max. results supported in nearest query") //
         ("max-alternatives",
          value<int>(&config.max_alternatives)->default_value(3),
-         "Max. number of alternatives supported in the MLD route query");
+         "Max. number of alternatives supported in the MLD route query") //
+        ("max-matching-radius",
+         value<double>(&config.max_radius_map_matching)->default_value(5),
+         "Max. radius size supported in map matching query");
 
     // hidden options, will be allowed on command line, but will not be shown to the user
     boost::program_options::options_description hidden_options("Hidden options");