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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 void lassert(lua_State *L, BOOL test, char* string) { |
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47 | if (!test) { |
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48 | luaL_error(L, "%s: %d", string, GetLastError()); |
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49 | } |
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50 | } |
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51 | |
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52 | static int Lget_consolecolor(lua_State *L) { |
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53 | HWND console = GetStdHandle(STD_OUTPUT_HANDLE); |
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54 | WORD color; DWORD read_len; |
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55 | |
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56 | CONSOLE_SCREEN_BUFFER_INFO info; |
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57 | |
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58 | lassert(L, console != INVALID_HANDLE_VALUE, "GetStdHandle"); |
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59 | lassert(L, GetConsoleScreenBufferInfo(console, &info), "GetConsoleScreenBufferInfo"); |
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60 | lassert(L, ReadConsoleOutputAttribute(console, &color, sizeof(WORD), info.dwCursorPosition, &read_len), "ReadConsoleOutputAttribute"); |
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61 | |
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62 | lua_pushnumber(L, color); |
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63 | return 1; |
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64 | } |
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65 | static int Lset_consolecolor(lua_State *L) { |
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66 | int color = luaL_checkint(L, 1); |
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67 | HWND console = GetStdHandle(STD_OUTPUT_HANDLE); |
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68 | lassert(L, console != INVALID_HANDLE_VALUE, "GetStdHandle"); |
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69 | lassert(L, SetConsoleTextAttribute(console, color), "SetConsoleTextAttribute"); |
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70 | return 0; |
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71 | } |
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72 | |
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73 | static const luaL_Reg Reg[] = |
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74 | { |
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75 | { "get_nameservers", Lget_nameservers }, |
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76 | { "get_consolecolor", Lget_consolecolor }, |
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77 | { "set_consolecolor", Lset_consolecolor }, |
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78 | { NULL, NULL } |
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79 | }; |
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80 | |
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81 | LUALIB_API int luaopen_util_windows(lua_State *L) { |
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82 | luaL_register(L, "windows", Reg); |
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83 | lua_pushliteral(L, "version"); /** version */ |
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84 | lua_pushliteral(L, "-3.14"); |
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85 | lua_settable(L,-3); |
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86 | return 1; |
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87 | } |