/* GIO - GLib Input, Output and Streaming Library

 *

 * Copyright (C) 2008 Christian Kellner, Samuel Cormier-Iijima

 *

 * SPDX-License-Identifier: LGPL-2.1-or-later

 *

 * 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 2.1 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/>.

 *

 * Authors: Christian Kellner <gicmo@gnome.org>

 *          Samuel Cormier-Iijima <sciyoshi@gmail.com>

 */

#include <config.h>

#include <glib.h>

#include <string.h>

#include "ginetsocketaddress.h"

#include "ginetaddress.h"

#include "gnetworkingprivate.h"

#include "gsocketconnectable.h"

#include "gioerror.h"

#include "glibintl.h"

/**

 * GInetSocketAddress:

 *

 * An IPv4 or IPv6 socket address. That is, the combination of a

 * [class@Gio.InetAddress] and a port number.

 *

 * In UNIX terms, `GInetSocketAddress` corresponds to a

 * [`struct sockaddr_in` or `struct sockaddr_in6`](man:sockaddr(3type)).

 */

struct _GInetSocketAddressPrivate

{

  GInetAddress *address;

  guint16       port;

  guint32       flowinfo;

  guint32       scope_id;

};

static void   g_inet_socket_address_connectable_iface_init (GSocketConnectableIface *iface);

static gchar *g_inet_socket_address_connectable_to_string  (GSocketConnectable      *connectable);

G_DEFINE_TYPE_WITH_CODE (GInetSocketAddress, g_inet_socket_address, G_TYPE_SOCKET_ADDRESS,

                         G_ADD_PRIVATE (GInetSocketAddress)

                         G_IMPLEMENT_INTERFACE (G_TYPE_SOCKET_CONNECTABLE,

                                                g_inet_socket_address_connectable_iface_init))

enum {

  PROP_0,

  PROP_ADDRESS,

  PROP_PORT,

  PROP_FLOWINFO,

  PROP_SCOPE_ID

};

static void

g_inet_socket_address_dispose (GObject *object)

{

  GInetSocketAddress *address = G_INET_SOCKET_ADDRESS (object);

  g_clear_object (&(address->priv->address));

  G_OBJECT_CLASS (g_inet_socket_address_parent_class)->dispose (object);

}

static void

g_inet_socket_address_get_property (GObject    *object,

                                    guint       prop_id,

                                    GValue     *value,

                                    GParamSpec *pspec)

{

  GInetSocketAddress *address = G_INET_SOCKET_ADDRESS (object);

  switch (prop_id)

    {

      case PROP_ADDRESS:

        g_value_set_object (value, address->priv->address);

        break;

      case PROP_PORT:

        g_value_set_uint (value, address->priv->port);

        break;

      case PROP_FLOWINFO:

  g_return_if_fail (g_inet_address_get_family (address->priv->address) == G_SOCKET_FAMILY_IPV6);

        g_value_set_uint (value, address->priv->flowinfo);

        break;

      case PROP_SCOPE_ID:

  g_return_if_fail (g_inet_address_get_family (address->priv->address) == G_SOCKET_FAMILY_IPV6);

        g_value_set_uint (value, address->priv->scope_id);

        break;

      default:

        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

    }

}

static void

g_inet_socket_address_set_property (GObject      *object,

                                    guint         prop_id,

                                    const GValue *value,

                                    GParamSpec   *pspec)

{

  GInetSocketAddress *address = G_INET_SOCKET_ADDRESS (object);

  switch (prop_id)

    {

      case PROP_ADDRESS:

        address->priv->address = g_object_ref (g_value_get_object (value));

        break;

      case PROP_PORT:

        address->priv->port = (guint16) g_value_get_uint (value);

        break;

      case PROP_FLOWINFO:

  /* We can't test that address->priv->address is IPv6 here,

   * since this property might get set before PROP_ADDRESS.

   */

        address->priv->flowinfo = g_value_get_uint (value);

        break;

      case PROP_SCOPE_ID:

        address->priv->scope_id = g_value_get_uint (value);

        break;

      default:

        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

    }

}

static GSocketFamily

g_inet_socket_address_get_family (GSocketAddress *address)

{

  GInetSocketAddress *addr;

  g_return_val_if_fail (G_IS_INET_SOCKET_ADDRESS (address), 0);

  addr = G_INET_SOCKET_ADDRESS (address);

  return g_inet_address_get_family (addr->priv->address);

}

static gssize

g_inet_socket_address_get_native_size (GSocketAddress *address)

{

  GInetSocketAddress *addr;

  GSocketFamily family;

  g_return_val_if_fail (G_IS_INET_SOCKET_ADDRESS (address), 0);

  addr = G_INET_SOCKET_ADDRESS (address);

  family = g_inet_address_get_family (addr->priv->address);

  if (family == AF_INET)

    return sizeof (struct sockaddr_in);

  else if (family == AF_INET6)

    return sizeof (struct sockaddr_in6);

  else

    return -1;

}

static gboolean

g_inet_socket_address_to_native (GSocketAddress  *address,

                                 gpointer         dest,

         gsize            destlen,

         GError         **error)

{

  GInetSocketAddress *addr;

  GSocketFamily family;

  g_return_val_if_fail (G_IS_INET_SOCKET_ADDRESS (address), FALSE);

  addr = G_INET_SOCKET_ADDRESS (address);

  family = g_inet_address_get_family (addr->priv->address);

  if (family == AF_INET)

    {

      struct sockaddr_in *sock = (struct sockaddr_in *) dest;

      if (destlen < sizeof (*sock))

  {

    g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NO_SPACE,

             _("Not enough space for socket address"));

    return FALSE;

  }

      sock->sin_family = AF_INET;

      sock->sin_port = g_htons (addr->priv->port);

      memcpy (&(sock->sin_addr.s_addr), g_inet_address_to_bytes (addr->priv->address), sizeof (sock->sin_addr));

      memset (sock->sin_zero, 0, sizeof (sock->sin_zero));

      return TRUE;

    }

  else if (family == AF_INET6)

    {

      struct sockaddr_in6 *sock = (struct sockaddr_in6 *) dest;

      if (destlen < sizeof (*sock))

  {

    g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NO_SPACE,

             _("Not enough space for socket address"));

    return FALSE;

  }

      memset (sock, 0, sizeof (*sock));

      sock->sin6_family = AF_INET6;

      sock->sin6_port = g_htons (addr->priv->port);

      sock->sin6_flowinfo = addr->priv->flowinfo;

      sock->sin6_scope_id = addr->priv->scope_id;

      memcpy (&(sock->sin6_addr.s6_addr), g_inet_address_to_bytes (addr->priv->address), sizeof (sock->sin6_addr));

      return TRUE;

    }

  else

    {

      g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,

         _("Unsupported socket address"));

      return FALSE;

    }

}

static void

g_inet_socket_address_class_init (GInetSocketAddressClass *klass)

{

  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);

  GSocketAddressClass *gsocketaddress_class = G_SOCKET_ADDRESS_CLASS (klass);

  gobject_class->dispose = g_inet_socket_address_dispose;

  gobject_class->set_property = g_inet_socket_address_set_property;

  gobject_class->get_property = g_inet_socket_address_get_property;

  gsocketaddress_class->get_family = g_inet_socket_address_get_family;

  gsocketaddress_class->to_native = g_inet_socket_address_to_native;

  gsocketaddress_class->get_native_size = g_inet_socket_address_get_native_size;

  /**

   * GInetSocketAddress:address:

   *

   * The address.

   *

   * Since: 2.22

   */

  g_object_class_install_property (gobject_class, PROP_ADDRESS,

                                   g_param_spec_object ("address", NULL, NULL,

                                                        G_TYPE_INET_ADDRESS,

                                                        G_PARAM_CONSTRUCT_ONLY |

                                                        G_PARAM_READWRITE |

                                                        G_PARAM_STATIC_STRINGS));

  /**

   * GInetSocketAddress:port:

   *

   * The port.

   *

   * Since: 2.22

   */

  g_object_class_install_property (gobject_class, PROP_PORT,

                                   g_param_spec_uint ("port", NULL, NULL,

                                                      0,

                                                      65535,

                                                      0,

                                                      G_PARAM_CONSTRUCT_ONLY |

                                                      G_PARAM_READWRITE |

                                                      G_PARAM_STATIC_STRINGS));

  /**

   * GInetSocketAddress:flowinfo:

   *

   * The `sin6_flowinfo` field, for IPv6 addresses.

   *

   * Since: 2.32

   */

  g_object_class_install_property (gobject_class, PROP_FLOWINFO,

                                   g_param_spec_uint ("flowinfo", NULL, NULL,

                                                      0,

                                                      G_MAXUINT32,

                                                      0,

                                                      G_PARAM_CONSTRUCT_ONLY |

                                                      G_PARAM_READWRITE |

                                                      G_PARAM_STATIC_STRINGS));

  /**

   * GInetSocketAddress:scope-id:

   *

   * The `sin6_scope_id` field, for IPv6 addresses.

   *

   * Since: 2.32

   */

  g_object_class_install_property (gobject_class, PROP_SCOPE_ID,

                                   g_param_spec_uint ("scope-id", NULL, NULL,

                                                      0,

                                                      G_MAXUINT32,

                                                      0,

                                                      G_PARAM_CONSTRUCT_ONLY |

                                                      G_PARAM_READWRITE |

                                                      G_PARAM_STATIC_STRINGS));

}

static void

g_inet_socket_address_connectable_iface_init (GSocketConnectableIface *iface)

{

  GSocketConnectableIface *parent_iface = g_type_interface_peek_parent (iface);

  iface->enumerate = parent_iface->enumerate;

  iface->proxy_enumerate = parent_iface->proxy_enumerate;

  iface->to_string = g_inet_socket_address_connectable_to_string;

}

static gchar *

g_inet_socket_address_connectable_to_string (GSocketConnectable *connectable)

{

  GInetSocketAddress *sa;

  GInetAddress *a;

  gchar *a_string;

  GString *out;

  guint16 port;

  sa = G_INET_SOCKET_ADDRESS (connectable);

  a = g_inet_socket_address_get_address (sa);

  out = g_string_new ("");

  /* Address. */

  a_string = g_inet_address_to_string (a);

  g_string_append (out, a_string);

  g_free (a_string);

  /* Scope ID (IPv6 only). */

  if (g_inet_address_get_family (a) == G_SOCKET_FAMILY_IPV6 &&

      g_inet_socket_address_get_scope_id (sa) != 0)

    {

      g_string_append_printf (out, "%%%u",

                              g_inet_socket_address_get_scope_id (sa));

    }

  /* Port. */

  port = g_inet_socket_address_get_port (sa);

  if (port != 0)

    {

      /* Disambiguate ports from IPv6 addresses using square brackets. */

      if (g_inet_address_get_family (a) == G_SOCKET_FAMILY_IPV6)

        {

          g_string_prepend (out, "[");

          g_string_append (out, "]");

        }

      g_string_append_printf (out, ":%u", port);

    }

  return g_string_free (out, FALSE);

}

static void

g_inet_socket_address_init (GInetSocketAddress *address)

{

  address->priv = g_inet_socket_address_get_instance_private (address);

}

/**

 * g_inet_socket_address_new:

 * @address: a #GInetAddress

 * @port: a port number

 *

 * Creates a new #GInetSocketAddress for @address and @port.

 *

 * Returns: a new #GInetSocketAddress

 *

 * Since: 2.22

 */

GSocketAddress *

g_inet_socket_address_new (GInetAddress *address,

                           guint16       port)

{

  return g_object_new (G_TYPE_INET_SOCKET_ADDRESS,

           "address", address,

           "port", port,

           NULL);

}

/**

 * g_inet_socket_address_new_from_string:

 * @address: the string form of an IP address

 * @port: a port number

 *

 * Creates a new #GInetSocketAddress for @address and @port.

 *

 * If @address is an IPv6 address, it can also contain a scope ID

 * (separated from the address by a `%`).

 *

 * Returns: (nullable) (transfer full): a new #GInetSocketAddress,

 * or %NULL if @address cannot be parsed.

 *

 * Since: 2.40

 */

GSocketAddress *

g_inet_socket_address_new_from_string (const char *address,

                                       guint       port)

{

  static struct addrinfo *hints, hints_struct;

  GSocketAddress *saddr;

  GInetAddress *iaddr;

  struct addrinfo *res;

  gint status;

  if (strchr (address, ':'))

    {

      /* IPv6 address (or it's invalid). We use getaddrinfo() because

       * it will handle parsing a scope_id as well.

       */

      if (G_UNLIKELY (g_once_init_enter_pointer (&hints)))

        {

          hints_struct.ai_family = AF_UNSPEC;

          hints_struct.ai_socktype = SOCK_STREAM;

          hints_struct.ai_protocol = 0;

          hints_struct.ai_flags = AI_NUMERICHOST;

          g_once_init_leave_pointer (&hints, &hints_struct);

        }

      status = getaddrinfo (address, NULL, hints, &res);

      if (status != 0)

        return NULL;

      if (res->ai_family == AF_INET6 &&

          res->ai_addrlen == sizeof (struct sockaddr_in6))

        {

          ((struct sockaddr_in6 *)res->ai_addr)->sin6_port = g_htons (port);

          saddr = g_socket_address_new_from_native (res->ai_addr, res->ai_addrlen);

        }

      else

        saddr = NULL;

      freeaddrinfo (res);

    }

  else

    {

      /* IPv4 (or invalid). We don't want to use getaddrinfo() here,

       * because it accepts the stupid "IPv4 numbers-and-dots

       * notation" addresses that are never used for anything except

       * phishing. Since we don't have to worry about scope IDs for

       * IPv4, we can just use g_inet_address_new_from_string().

       */

      iaddr = g_inet_address_new_from_string (address);

      if (!iaddr)

        return NULL;

      g_warn_if_fail (g_inet_address_get_family (iaddr) == G_SOCKET_FAMILY_IPV4);

      saddr = g_inet_socket_address_new (iaddr, port);

      g_object_unref (iaddr);

    }

  return saddr;

}

/**

 * g_inet_socket_address_get_address:

 * @address: a #GInetSocketAddress

 *

 * Gets @address's #GInetAddress.

 *

 * Returns: (transfer none): the #GInetAddress for @address, which must be

 * g_object_ref()'d if it will be stored

 *

 * Since: 2.22

 */

GInetAddress *

g_inet_socket_address_get_address (GInetSocketAddress *address)

{

  g_return_val_if_fail (G_IS_INET_SOCKET_ADDRESS (address), NULL);

  return address->priv->address;

}

/**

 * g_inet_socket_address_get_port:

 * @address: a #GInetSocketAddress

 *

 * Gets @address's port.

 *

 * Returns: the port for @address

 *

 * Since: 2.22

 */

guint16

g_inet_socket_address_get_port (GInetSocketAddress *address)

{

  g_return_val_if_fail (G_IS_INET_SOCKET_ADDRESS (address), 0);

  return address->priv->port;

}

/**

 * g_inet_socket_address_get_flowinfo:

 * @address: a %G_SOCKET_FAMILY_IPV6 #GInetSocketAddress

 *

 * Gets the `sin6_flowinfo` field from @address,

 * which must be an IPv6 address.

 *

 * Returns: the flowinfo field

 *

 * Since: 2.32

 */

guint32

g_inet_socket_address_get_flowinfo (GInetSocketAddress *address)

{

  g_return_val_if_fail (G_IS_INET_SOCKET_ADDRESS (address), 0);

  g_return_val_if_fail (g_inet_address_get_family (address->priv->address) == G_SOCKET_FAMILY_IPV6, 0);

  return address->priv->flowinfo;

}

/**

 * g_inet_socket_address_get_scope_id:

 * @address: a %G_SOCKET_FAMILY_IPV6 #GInetAddress

 *

 * Gets the `sin6_scope_id` field from @address,

 * which must be an IPv6 address.

 *

 * Returns: the scope id field

 *

 * Since: 2.32

 */

guint32

g_inet_socket_address_get_scope_id (GInetSocketAddress *address)

{

  g_return_val_if_fail (G_IS_INET_SOCKET_ADDRESS (address), 0);

  g_return_val_if_fail (g_inet_address_get_family (address->priv->address) == G_SOCKET_FAMILY_IPV6, 0);

  return address->priv->scope_id;

}