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/*
* This file defines the lua interface into
* FRRouting.
*
* Copyright (C) 2016 Cumulus Networks, Inc.
* Donald Sharp
*
* This file is part of FRRouting (FRR).
*
* FRR 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 2, or (at your option) any later version.
*
* FRR 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 FRR; see the file COPYING. If not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <zebra.h>
#if defined(HAVE_LUA)
#include "prefix.h"
#include "frrlua.h"
#include "log.h"
static int lua_zlog_debug(lua_State *L)
{
int debug_lua = 1;
const char *string = lua_tostring(L, 1);
if (debug_lua)
zlog_debug("%s", string);
return 0;
}
const char *get_string(lua_State *L, const char *key)
{
const char *str;
lua_pushstring(L, key);
lua_gettable(L, -2);
str = (const char *)lua_tostring(L, -1);
lua_pop(L, 1);
return str;
}
int get_integer(lua_State *L, const char *key)
{
int result;
lua_pushstring(L, key);
lua_gettable(L, -2);
result = lua_tointeger(L, -1);
lua_pop(L, 1);
return result;
}
static void *lua_alloc(void *ud, void *ptr, size_t osize,
size_t nsize)
{
(void)ud; (void)osize; /* not used */
if (nsize == 0) {
free(ptr);
return NULL;
} else
return realloc(ptr, nsize);
}
lua_State *lua_initialize(const char *file)
{
int status;
lua_State *L = lua_newstate(lua_alloc, NULL);
zlog_debug("Newstate: %p", L);
luaL_openlibs(L);
zlog_debug("Opened lib");
status = luaL_loadfile(L, file);
if (status) {
zlog_debug("Failure to open %s %d", file, status);
lua_close(L);
return NULL;
}
lua_pcall(L, 0, LUA_MULTRET, 0);
zlog_debug("Setting global function");
lua_pushcfunction(L, lua_zlog_debug);
lua_setglobal(L, "zlog_debug");
return L;
}
void lua_setup_prefix_table(lua_State *L, const struct prefix *prefix)
{
char buffer[100];
lua_newtable(L);
lua_pushstring(L, prefix2str(prefix, buffer, 100));
lua_setfield(L, -2, "route");
lua_pushinteger(L, prefix->family);
lua_setfield(L, -2, "family");
lua_setglobal(L, "prefix");
}
enum lua_rm_status lua_run_rm_rule(lua_State *L, const char *rule)
{
int status;
lua_getglobal(L, rule);
status = lua_pcall(L, 0, 1, 0);
if (status) {
zlog_debug("Executing Failure with function: %s: %d",
rule, status);
return LUA_RM_FAILURE;
}
status = lua_tonumber(L, -1);
return status;
}
#endif
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