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/* Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
*/
/*
* windows.c
* Windows support functions for Lua
*/
#include <stdio.h>
#include <windows.h>
#include <windns.h>
#include "lua.h"
#include "lauxlib.h"
#if (LUA_VERSION_NUM < 504)
#define luaL_pushfail lua_pushnil
#endif
static int Lget_nameservers(lua_State *L) {
char stack_buffer[1024]; // stack allocated buffer
IP4_ARRAY *ips = (IP4_ARRAY *) stack_buffer;
DWORD len = sizeof(stack_buffer);
DNS_STATUS status;
status = DnsQueryConfig(DnsConfigDnsServerList, FALSE, NULL, NULL, ips, &len);
if(status == 0) {
DWORD i;
lua_createtable(L, ips->AddrCount, 0);
for(i = 0; i < ips->AddrCount; i++) {
DWORD ip = ips->AddrArray[i];
char ip_str[16] = "";
sprintf_s(ip_str, sizeof(ip_str), "%d.%d.%d.%d", (ip >> 0) & 255, (ip >> 8) & 255, (ip >> 16) & 255, (ip >> 24) & 255);
lua_pushstring(L, ip_str);
lua_rawseti(L, -2, i + 1);
}
return 1;
} else {
luaL_pushfail(L);
lua_pushfstring(L, "DnsQueryConfig returned %d", status);
return 2;
}
}
static int lerror(lua_State *L, char *string) {
luaL_pushfail(L);
lua_pushfstring(L, "%s: %d", string, GetLastError());
return 2;
}
static int Lget_consolecolor(lua_State *L) {
HWND console = GetStdHandle(STD_OUTPUT_HANDLE);
WORD color;
DWORD read_len;
CONSOLE_SCREEN_BUFFER_INFO info;
if(console == INVALID_HANDLE_VALUE) {
return lerror(L, "GetStdHandle");
}
if(!GetConsoleScreenBufferInfo(console, &info)) {
return lerror(L, "GetConsoleScreenBufferInfo");
}
if(!ReadConsoleOutputAttribute(console, &color, 1, info.dwCursorPosition, &read_len)) {
return lerror(L, "ReadConsoleOutputAttribute");
}
lua_pushnumber(L, color);
return 1;
}
static int Lset_consolecolor(lua_State *L) {
int color = luaL_checkint(L, 1);
HWND console = GetStdHandle(STD_OUTPUT_HANDLE);
if(console == INVALID_HANDLE_VALUE) {
return lerror(L, "GetStdHandle");
}
if(!SetConsoleTextAttribute(console, color)) {
return lerror(L, "SetConsoleTextAttribute");
}
lua_pushboolean(L, 1);
return 1;
}
static const luaL_Reg Reg[] = {
{ "get_nameservers", Lget_nameservers },
{ "get_consolecolor", Lget_consolecolor },
{ "set_consolecolor", Lset_consolecolor },
{ NULL, NULL }
};
LUALIB_API int luaopen_util_windows(lua_State *L) {
luaL_checkversion(L);
lua_newtable(L);
luaL_setfuncs(L, Reg, 0);
lua_pushliteral(L, "-3.14");
lua_setfield(L, -2, "version");
return 1;
}
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