1 files changed, 89 insertions, 0 deletions
diff --git a/daemon/engine.h b/daemon/engine.h
new file mode 100644
index 0000000..b79991a
--- /dev/null
+++ b/daemon/engine.h
@@ -0,0 +1,89 @@
+/*  Copyright (C) 2015-2017 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+/*
+ * @internal These are forward decls to allow building modules with engine but without Lua.
+ */
+struct lua_State;
+
+#include "lib/utils.h"
+#include "lib/resolve.h"
+#include "daemon/network.h"
+
+/* @internal Array of file descriptors shorthand. */
+typedef array_t(int) fd_array_t;
+
+struct engine {
+    struct kr_context resolver;
+    struct network net;
+    module_array_t modules;
+    array_t(const struct kr_cdb_api *) backends;
+    fd_array_t ipc_set;
+    knot_mm_t *pool;
+    char *hostname;
+    struct lua_State *L;
+    char *moduledir;
+};
+
+int engine_init(struct engine *engine, knot_mm_t *pool);
+void engine_deinit(struct engine *engine);
+
+/** Perform a lua command within the sandbox.
+ *
+ *  @return zero on success.
+ *  The result will be returned on the lua stack - an error message in case of failure.
+ *  http://www.lua.org/manual/5.1/manual.html#lua_pcall */
+int engine_cmd(struct lua_State *L, const char *str, bool raw);
+
+/** Execute current chunk in the sandbox */
+int engine_pcall(struct lua_State *L, int argc);
+
+int engine_ipc(struct engine *engine, const char *expr);
+
+
+int engine_load_sandbox(struct engine *engine);
+int engine_loadconf(struct engine *engine, const char *config_path);
+int engine_load_defaults(struct engine *engine);
+
+/** Start the lua engine and execute the config. */
+int engine_start(struct engine *engine);
+void engine_stop(struct engine *engine);
+int engine_register(struct engine *engine, const char *name, const char *precedence, const char* ref);
+int engine_unregister(struct engine *engine, const char *name);
+void engine_lualib(struct engine *engine, const char *name, int (*lib_cb) (struct lua_State *));
+
+
+/** Return engine light userdata. */
+struct engine *engine_luaget(struct lua_State *L);
+
+/** Set/get the per engine hostname */
+char *engine_get_hostname(struct engine *engine);
+int engine_set_hostname(struct engine *engine, const char *hostname);
+
+/** Set/get the per engine moduledir */
+char *engine_get_moduledir(struct engine *engine);
+int engine_set_moduledir(struct engine *engine, const char *moduledir);
+
+/** Load root hints from a zonefile (or config-time default if NULL).
+ *
+ * @return error message or NULL (statically allocated)
+ * @note exported to be usable from the hints module.
+ */
+KR_EXPORT
+const char* engine_hint_root_file(struct kr_context *ctx, const char *file);
+