1/*
2 *  OpenVPN -- An application to securely tunnel IP networks
3 *             over a single UDP port, with support for SSL/TLS-based
4 *             session authentication and key exchange,
5 *             packet encryption, packet authentication, and
6 *             packet compression.
7 *
8 *  Copyright (C) 2011 - David Sommerseth <davids@redhat.com>
9 *
10 *  This program is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU General Public License version 2
12 *  as published by the Free Software Foundation.
13 *
14 *  This program is distributed in the hope that it will be useful,
15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *  GNU General Public License for more details.
18 *
19 *  You should have received a copy of the GNU General Public License
20 *  along with this program (see the file COPYING included with this
21 *  distribution); if not, write to the Free Software Foundation, Inc.,
22 *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
23 */
24
25#ifdef HAVE_CONFIG_H
26#include "config.h"
27#elif defined(_MSC_VER)
28#include "config-msvc.h"
29#endif
30
31#ifndef HAVE_INET_NTOP
32
33#include "compat.h"
34
35#ifdef WIN32
36
37#include <windows.h>
38
39/*
40 * inet_ntop() and inet_pton() wrap-implementations using
41 * WSAAddressToString() and WSAStringToAddress() functions
42 *
43 * this is needed as long as we support running OpenVPN on WinXP
44 */
45
46const char *
47inet_ntop(int af, const void *src, char *dst, socklen_t size)
48{
49  struct sockaddr_storage ss;
50  unsigned long s = size;
51
52  ZeroMemory(&ss, sizeof(ss));
53  ss.ss_family = af;
54
55  switch(af) {
56    case AF_INET:
57      ((struct sockaddr_in *)&ss)->sin_addr = *(struct in_addr *)src;
58      break;
59    case AF_INET6:
60      ((struct sockaddr_in6 *)&ss)->sin6_addr = *(struct in6_addr *)src;
61      break;
62    default:
63      return NULL;
64  }
65  /* cannot direclty use &size because of strict aliasing rules */
66  return (WSAAddressToString((struct sockaddr *)&ss, sizeof(ss), NULL, dst, &s) == 0)?
67          dst : NULL;
68}
69
70#else
71
72#error no emulation for inet_ntop
73
74#endif
75
76#endif
77