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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2011 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gnetworking.h"
#ifdef G_OS_WIN32
/* For Windows XP run-time compatibility */
#include "gwin32networking.h"
GWin32WinsockFuncs ws2funcs = {0};
#endif
/**
* SECTION:gnetworking
* @title: gnetworking.h
* @short_description: System networking includes
* @include: gio/gnetworking.h
*
* The `<gio/gnetworking.h>` header can be included to get
* various low-level networking-related system headers, automatically
* taking care of certain portability issues for you.
*
* This can be used, for example, if you want to call setsockopt()
* on a #GSocket.
*
* Note that while WinSock has many of the same APIs as the
* traditional UNIX socket API, most of them behave at least slightly
* differently (particularly with respect to error handling). If you
* want your code to work under both UNIX and Windows, you will need
* to take these differences into account.
*
* Also, under GNU libc, certain non-portable functions are only visible
* in the headers if you define %_GNU_SOURCE before including them. Note
* that this symbol must be defined before including any headers, or it
* may not take effect.
*/
/**
* g_networking_init:
*
* Initializes the platform networking libraries (eg, on Windows, this
* calls WSAStartup()). GLib will call this itself if it is needed, so
* you only need to call it if you directly call system networking
* functions (without calling any GLib networking functions first).
*
* Since: 2.36
*/
void
g_networking_init (void)
{
#ifdef G_OS_WIN32
static volatile gsize inited = 0;
if (g_once_init_enter (&inited))
{
WSADATA wsadata;
HMODULE ws2dll, iphlpapidll;
if (WSAStartup (MAKEWORD (2, 0), &wsadata) != 0)
g_error ("Windows Sockets could not be initialized");
/* We want to use these functions if they are available, but
* still need to make sure the code still runs on Windows XP
*/
ws2dll = LoadLibraryW (L"ws2_32.dll");
iphlpapidll = LoadLibraryW (L"iphlpapi.dll");
if (ws2dll != NULL)
{
ws2funcs.pInetNtop =
(PFN_InetNtop) GetProcAddress (ws2dll, "inet_ntop");
ws2funcs.pInetPton =
(PFN_InetPton) GetProcAddress (ws2dll, "inet_pton");
FreeLibrary (ws2dll);
}
else
{
ws2funcs.pInetNtop = NULL;
ws2funcs.pInetPton = NULL;
}
if (iphlpapidll != NULL)
{
ws2funcs.pIfNameToIndex =
(PFN_IfNameToIndex) GetProcAddress (iphlpapidll, "if_nametoindex");
FreeLibrary (iphlpapidll);
}
else
ws2funcs.pIfNameToIndex = NULL;
g_once_init_leave (&inited, 1);
}
#endif
}
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