1  /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
       2  
       3  /* GIO - GLib Input, Output and Streaming Library
       4   *
       5   * Copyright (C) 2011 Red Hat, Inc.
       6   *
       7   * SPDX-License-Identifier: LGPL-2.1-or-later
       8   *
       9   * This library is free software; you can redistribute it and/or
      10   * modify it under the terms of the GNU Lesser General Public
      11   * License as published by the Free Software Foundation; either
      12   * version 2.1 of the License, or (at your option) any later version.
      13   *
      14   * This library 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 GNU
      17   * Lesser General Public License for more details.
      18   *
      19   * You should have received a copy of the GNU Lesser General
      20   * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
      21   */
      22  
      23  #include "config.h"
      24  
      25  #include "gnetworking.h"
      26  #include "gnetworkingprivate.h"
      27  
      28  /**
      29   * g_networking_init:
      30   *
      31   * Initializes the platform networking libraries (eg, on Windows, this
      32   * calls WSAStartup()). GLib will call this itself if it is needed, so
      33   * you only need to call it if you directly call system networking
      34   * functions (without calling any GLib networking functions first).
      35   *
      36   * Since: 2.36
      37   */
      38  void
      39  g_networking_init (void)
      40  {
      41  #ifdef G_OS_WIN32
      42    static gsize inited = 0;
      43  
      44    if (g_once_init_enter (&inited))
      45      {
      46        WSADATA wsadata;
      47  
      48        if (WSAStartup (MAKEWORD (2, 0), &wsadata) != 0)
      49          g_error ("Windows Sockets could not be initialized");
      50  
      51        g_once_init_leave (&inited, 1);
      52      }
      53  #endif
      54  }
      55  
      56  gboolean
      57  g_getservbyname_ntohs (const char *name, const char *proto, guint16 *out_port)
      58  {
      59    struct servent *result;
      60  
      61  #ifdef HAVE_GETSERVBYNAME_R
      62    struct servent result_buf;
      63    char buf[2048];
      64    int r;
      65  
      66    r = getservbyname_r (name, proto, &result_buf, buf, sizeof (buf), &result);
      67    if (r != 0 || result != &result_buf)
      68      result = NULL;
      69  #else
      70    result = getservbyname (name, proto);
      71  #endif
      72  
      73    if (!result)
      74      return FALSE;
      75    *out_port = g_ntohs (result->s_port);
      76    return TRUE;
      77  }