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#include <stdio.h>
#include <windows.h>
#include <windns.h>
#include "lua.h"
#include "lauxlib.h"
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_error(L, "DnsQueryConfig returned %d", status);
return 0; // unreachable, but prevents a compiler warning
}
}
static const luaL_Reg Reg[] =
{
{ "get_nameservers", Lget_nameservers },
{ NULL, NULL }
};
LUALIB_API int luaopen_util_windows(lua_State *L) {
luaL_register(L, "windows", Reg);
lua_pushliteral(L, "version"); /** version */
lua_pushliteral(L, "-3.14");
lua_settable(L,-3);
return 1;
}
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