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/* Copyright (C) CZ.NIC, z.s.p.o. <knot-resolver@labs.nic.cz>
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#include "daemon/bindings/impl.h"
/** List loaded modules */
static int mod_list(lua_State *L)
{
const module_array_t * const modules = &the_worker->engine->modules;
lua_newtable(L);
for (unsigned i = 0; i < modules->len; ++i) {
struct kr_module *module = modules->at[i];
lua_pushstring(L, module->name);
lua_rawseti(L, -2, i + 1);
}
return 1;
}
/** Load module. */
static int mod_load(lua_State *L)
{
/* Check parameters */
int n = lua_gettop(L);
if (n != 1 || !lua_isstring(L, 1))
lua_error_p(L, "expected 'load(string name)'");
/* Parse precedence declaration */
char *declaration = strdup(lua_tostring(L, 1));
if (!declaration)
return kr_error(ENOMEM);
const char *name = strtok(declaration, " ");
const char *precedence = strtok(NULL, " ");
const char *ref = strtok(NULL, " ");
/* Load engine module */
int ret = engine_register(the_worker->engine, name, precedence, ref);
free(declaration);
if (ret != 0) {
if (ret == kr_error(EIDRM)) {
lua_error_p(L, "referenced module not found");
} else {
lua_error_maybe(L, ret);
}
}
lua_pushboolean(L, 1);
return 1;
}
/** Unload module. */
static int mod_unload(lua_State *L)
{
/* Check parameters */
int n = lua_gettop(L);
if (n != 1 || !lua_isstring(L, 1))
lua_error_p(L, "expected 'unload(string name)'");
/* Unload engine module */
int ret = engine_unregister(the_worker->engine, lua_tostring(L, 1));
lua_error_maybe(L, ret);
lua_pushboolean(L, 1);
return 1;
}
int kr_bindings_modules(lua_State *L)
{
static const luaL_Reg lib[] = {
{ "list", mod_list },
{ "load", mod_load },
{ "unload", mod_unload },
{ NULL, NULL }
};
luaL_register(L, "modules", lib);
return 1;
}
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