prosody
8520cd88b84c
util-src/windows.c

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util-src/windows.c @ 3345:8520cd88b84c

xmpp{client,server}_listener: Convert some calls to tail calls for efficiency
author Matthew Wild <mwild1@gmail.com>
date Fri, 09 Jul 2010 13:28:41 +0100
parent 2924:8dc4e2e00129
child 3748:2237796ba228
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2924
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1 /* Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8 */
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9
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10 /*
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11 * windows.c
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12 * Windows support functions for Lua
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13 */
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14
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15 #include <stdio.h>
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16 #include <windows.h>
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17 #include <windns.h>
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18
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19 #include "lua.h"
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20 #include "lauxlib.h"
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21
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22 static int Lget_nameservers(lua_State *L) {
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23 char stack_buffer[1024]; // stack allocated buffer
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24 IP4_ARRAY* ips = (IP4_ARRAY*) stack_buffer;
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25 DWORD len = sizeof(stack_buffer);
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26 DNS_STATUS status;
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27
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28 status = DnsQueryConfig(DnsConfigDnsServerList, FALSE, NULL, NULL, ips, &len);
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29 if (status == 0) {
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30 DWORD i;
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31 lua_createtable(L, ips->AddrCount, 0);
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32 for (i = 0; i < ips->AddrCount; i++) {
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33 DWORD ip = ips->AddrArray[i];
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34 char ip_str[16] = "";
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35 sprintf_s(ip_str, sizeof(ip_str), "%d.%d.%d.%d", (ip >> 0) & 255, (ip >> 8) & 255, (ip >> 16) & 255, (ip >> 24) & 255);
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36 lua_pushstring(L, ip_str);
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37 lua_rawseti(L, -2, i+1);
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38 }
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39 return 1;
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40 } else {
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41 luaL_error(L, "DnsQueryConfig returned %d", status);
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42 return 0; // unreachable, but prevents a compiler warning
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43 }
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44 }
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45
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46 static const luaL_Reg Reg[] =
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47 {
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48 { "get_nameservers", Lget_nameservers },
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49 { NULL, NULL }
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50 };
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51
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52 LUALIB_API int luaopen_util_windows(lua_State *L) {
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53 luaL_register(L, "windows", Reg);
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54 lua_pushliteral(L, "version"); /** version */
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55 lua_pushliteral(L, "-3.14");
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56 lua_settable(L,-3);
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57 return 1;
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58 }