Update error message for failing to satisfy minimum wire version

Author: eramongodb

src/libmongoc/src/mongoc/mongoc-topology-description.c

@@ -1989,9 +1989,11 @@ _mongoc_topology_description_check_compatible (
             MONGOC_ERROR_PROTOCOL,
             MONGOC_ERROR_PROTOCOL_BAD_WIRE_VERSION,
             "Server at %s reports wire version %d, but this"
-            " version of libmongoc requires at least 3 (MongoDB 3.0)",
+            " version of libmongoc requires at least %d (MongoDB %s)",
             sd->host.host_and_port,
-            sd->max_wire_version);
+            sd->max_wire_version,
+            WIRE_VERSION_MIN,
+            _mongoc_wire_version_to_server_version (WIRE_VERSION_MIN));
       }
    }
 }

src/libmongoc/src/mongoc/mongoc-util-private.h

@@ -100,6 +100,9 @@ _mongoc_bson_init_if_set (bson_t *bson);
 const char *
 _mongoc_bson_type_to_str (bson_type_t t);
 
+const char *
+_mongoc_wire_version_to_server_version (int32_t version);
+
 bool
 _mongoc_get_server_id_from_opts (const bson_t *opts,
                                  mongoc_error_domain_t domain,

src/libmongoc/src/mongoc/mongoc-util.c

@@ -268,6 +268,48 @@ _mongoc_bson_type_to_str (bson_type_t t)
 }
 
 
+/* Refer to:
+ * https://github.com/mongodb/specifications/blob/master/source/wireversion-featurelist.rst
+ * and:
+ * https://github.com/mongodb/mongo/blob/master/src/mongo/db/wire_version.h#L57
+ */
+const char *
+_mongoc_wire_version_to_server_version (int32_t version)
+{
+   switch (version) {
+   case 1:
+   case 2:
+      return "2.6";
+   case 3:
+      return "3.0";
+   case 4:
+      return "3.2";
+   case 5:
+      return "3.4";
+   case 6:
+      return "3.6";
+   case 7:
+      return "4.0";
+   case 8:
+      return "4.2";
+   case 9:
+      return "4.4";
+   case 10:
+      return "4.7";
+   case 11:
+      return "4.8";
+   case 12:
+      return "4.9";
+   case 13:
+      return "5.0";
+   case 14:
+      return "5.1";
+   default:
+      return "Unknown";
+   }
+}
+
+
 /* Get "serverId" from opts. Sets *server_id to the serverId from "opts" or 0
  * if absent. On error, fills out *error with domain and code and return false.
  */