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/*
* nixio - Linux I/O library for lua
*
* Copyright (C) 2011 Jo-Philipp Wich <jow@openwrt.org>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "nixio.h"
#ifndef __WINNT__
#include <netdb.h>
#endif
/**
* protoent conversion helper
*/
static int nixio__pushprotoent(lua_State *L, struct protoent *e) {
int i;
if (e) {
lua_newtable(L);
lua_pushstring(L, e->p_name);
lua_setfield(L, -2, "name");
lua_pushnumber(L, e->p_proto);
lua_setfield(L, -2, "proto");
lua_newtable(L);
for (i = 0; e->p_aliases[i]; i++) {
lua_pushstring(L, e->p_aliases[i]);
lua_rawseti(L, -2, i+1);
}
lua_setfield(L, -2, "aliases");
return 1;
} else {
return 0;
}
}
/**
* getprotobyname(name)
*/
static int nixio_getprotobyname(lua_State *L) {
const char *name = luaL_checkstring(L, 1);
struct protoent *res = getprotobyname(name);
return nixio__pushprotoent(L, res);
}
/**
* getprotobynumber(proto)
*/
static int nixio_getprotobynumber(lua_State *L) {
int proto = luaL_checkinteger(L, 1);
struct protoent *res = getprotobynumber(proto);
return nixio__pushprotoent(L, res);
}
/**
* getproto(name_or_proto)
*/
static int nixio_getproto(lua_State *L) {
int i = 1;
struct protoent *res;
if (lua_isnumber(L, 1)) {
return nixio_getprotobynumber(L);
} else if (lua_isstring(L, 1)) {
return nixio_getprotobyname(L);
} else if (lua_isnoneornil(L, 1)) {
setprotoent(1);
lua_newtable(L);
while ((res = getprotoent()) != NULL) {
nixio__pushprotoent(L, res);
lua_rawseti(L, -2, i++);
}
endprotoent();
return 1;
} else {
return luaL_argerror(L, 1, "supported values: <protoname>, <protonumber>");
}
}
/* module table */
static const luaL_reg R[] = {
{"getprotobyname", nixio_getprotobyname},
{"getprotobynumber", nixio_getprotobynumber},
{"getproto", nixio_getproto},
{NULL, NULL}
};
void nixio_open_protoent(lua_State *L) {
luaL_register(L, NULL, R);
}
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