gio/gsocketaddress.c

   1 /* GIO - GLib Input, Output and Streaming Library
   2  *
   3  * Copyright (C) 2008 Christian Kellner, Samuel Cormier-Iijima
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General
  16  * Public License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  *
  20  * Authors: Christian Kellner <gicmo@gnome.org>
  21  *          Samuel Cormier-Iijima <sciyoshi@gmail.com>
  22  */
  23
  24 #include <config.h>
  25 #include <glib.h>
  26
  27 #include "gsocketaddress.h"
  28 #include "ginetaddress.h"
  29 #include "ginetsocketaddress.h"
  30 #include "gnetworkingprivate.h"
  31 #include "gsocketaddressenumerator.h"
  32 #include "gsocketconnectable.h"
  33 #include "glibintl.h"
  34 #include "gioenumtypes.h"
  35
  36 #ifdef G_OS_UNIX
  37 #include "gunixsocketaddress.h"
  38 #endif
  39
  40 #include "gioalias.h"
  41
  42 /**
  43  * SECTION:gsocketaddress
  44  * @short_description: Abstract base class representing endpoints for
  45  * socket communication
  46  *
  47  * #GSocketAddress is the equivalent of <type>struct sockaddr</type>
  48  * in the BSD sockets API. This is an abstract class; use
  49  * #GInetSocketAddress for internet sockets, or #GUnixSocketAddress
  50  * for UNIX domain sockets.
  51  **/
  52
  53 /**
  54  * GSocketAddress:
  55  *
  56  * A socket endpoint address, corresponding to <type>struct sockaddr</type>
  57  * or one of its subtypes.
  58  **/
  59
  60 enum
  61 {
  62   PROP_NONE,
  63   PROP_FAMILY
  64 };
  65
  66 static void                      g_socket_address_connectable_iface_init (GSocketConnectableIface *iface);
  67 static GSocketAddressEnumerator *g_socket_address_connectable_enumerate  (GSocketConnectable      *connectable);
  68
  69 G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GSocketAddress, g_socket_address, G_TYPE_OBJECT,
  70                                   G_IMPLEMENT_INTERFACE (G_TYPE_SOCKET_CONNECTABLE,
  71                                                          g_socket_address_connectable_iface_init))
  72
  73 /**
  74  * g_socket_address_get_family:
  75  * @address: a #GSocketAddress
  76  *
  77  * Gets the socket family type of @address.
  78  *
  79  * Returns: the socket family type of @address.
  80  *
  81  * Since: 2.22
  82  */
  83 GSocketFamily
  84 g_socket_address_get_family (GSocketAddress *address)
  85 {
  86   g_return_val_if_fail (G_IS_SOCKET_ADDRESS (address), 0);
  87
  88   return G_SOCKET_ADDRESS_GET_CLASS (address)->get_family (address);
  89 }
  90
  91 static void
  92 g_socket_address_get_property (GObject *object, guint prop_id,
  93                                GValue *value, GParamSpec *pspec)
  94 {
  95   GSocketAddress *address = G_SOCKET_ADDRESS (object);
  96
  97   switch (prop_id)
  98     {
  99      case PROP_FAMILY:
 100       g_value_set_enum (value, g_socket_address_get_family (address));
 101       break;
 102
 103      default:
 104       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 105     }
 106 }
 107
 108 static void
 109 g_socket_address_class_init (GSocketAddressClass *klass)
 110 {
 111   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
 112
 113   gobject_class->get_property = g_socket_address_get_property;
 114
 115   g_object_class_install_property (gobject_class, PROP_FAMILY,
 116                                    g_param_spec_enum ("family",
 117                                                       P_("Address family"),
 118                                                       P_("The family of the socket address"),
 119                                                       G_TYPE_SOCKET_FAMILY,
 120                                                       G_SOCKET_FAMILY_INVALID,
 121                                                       G_PARAM_READABLE | G_PARAM_STATIC_NICK | G_PARAM_STATIC_BLURB | G_PARAM_STATIC_NAME));
 122 }
 123
 124 static void
 125 g_socket_address_connectable_iface_init (GSocketConnectableIface *connectable_iface)
 126 {
 127   connectable_iface->enumerate  = g_socket_address_connectable_enumerate;
 128 }
 129
 130 static void
 131 g_socket_address_init (GSocketAddress *address)
 132 {
 133
 134 }
 135
 136 /**
 137  * g_socket_address_get_native_size:
 138  * @address: a #GSocketAddress
 139  *
 140  * Gets the size of @address's native <type>struct sockaddr</type>.
 141  * You can use this to allocate memory to pass to
 142  * g_socket_address_to_native().
 143  *
 144  * Returns: the size of the native <type>struct sockaddr</type> that
 145  * @address represents
 146  *
 147  * Since: 2.22
 148  */
 149 gssize
 150 g_socket_address_get_native_size (GSocketAddress *address)
 151 {
 152   g_return_val_if_fail (G_IS_SOCKET_ADDRESS (address), -1);
 153
 154   return G_SOCKET_ADDRESS_GET_CLASS (address)->get_native_size (address);
 155 }
 156
 157 /**
 158  * g_socket_address_to_native:
 159  * @address: a #GSocketAddress
 160  * @dest: a pointer to a memory location that will contain the native
 161  * <type>struct sockaddr</type>.
 162  * @destlen: the size of @dest. Must be at least as large as
 163  * g_socket_address_get_native_size().
 164  * @error: #GError for error reporting, or %NULL to ignore.
 165  *
 166  * Converts a #GSocketAddress to a native <type>struct
 167  * sockaddr</type>, which can be passed to low-level functions like
 168  * connect() or bind().
 169  *
 170  * If not enough space is availible, a %G_IO_ERROR_NO_SPACE error is
 171  * returned. If the address type is not known on the system
 172  * then a %G_IO_ERROR_NOT_SUPPORTED error is returned.
 173  *
 174  * Returns: %TRUE if @dest was filled in, %FALSE on error
 175  *
 176  * Since: 2.22
 177  */
 178 gboolean
 179 g_socket_address_to_native (GSocketAddress *address,
 180                             gpointer        dest,
 181                             gsize           destlen,
 182                             GError        **error)
 183 {
 184   g_return_val_if_fail (G_IS_SOCKET_ADDRESS (address), FALSE);
 185
 186   return G_SOCKET_ADDRESS_GET_CLASS (address)->to_native (address, dest, destlen, error);
 187 }
 188
 189 /**
 190  * g_socket_address_new_from_native:
 191  * @native: a pointer to a <type>struct sockaddr</type>
 192  * @len: the size of the memory location pointed to by @native
 193  *
 194  * Creates a #GSocketAddress subclass corresponding to the native
 195  * <type>struct sockaddr</type> @native.
 196  *
 197  * Returns: a new #GSocketAddress if @native could successfully be converted,
 198  * otherwise %NULL.
 199  *
 200  * Since: 2.22
 201  */
 202 GSocketAddress *
 203 g_socket_address_new_from_native (gpointer native,
 204                                   gsize    len)
 205 {
 206   gshort family;
 207
 208   if (len < sizeof (gshort))
 209     return NULL;
 210
 211   family = ((struct sockaddr *) native)->sa_family;
 212
 213   if (family == AF_UNSPEC)
 214     return NULL;
 215
 216   if (family == AF_INET)
 217     {
 218       struct sockaddr_in *addr = (struct sockaddr_in *) native;
 219       GInetAddress *iaddr = g_inet_address_new_from_bytes ((guint8 *) &(addr->sin_addr), AF_INET);
 220       GSocketAddress *sockaddr;
 221
 222       sockaddr = g_inet_socket_address_new (iaddr, g_ntohs (addr->sin_port));
 223       g_object_unref (iaddr);
 224       return sockaddr;
 225     }
 226
 227   if (family == AF_INET6)
 228     {
 229       struct sockaddr_in6 *addr = (struct sockaddr_in6 *) native;
 230       GInetAddress *iaddr = g_inet_address_new_from_bytes ((guint8 *) &(addr->sin6_addr), AF_INET6);
 231       GSocketAddress *sockaddr;
 232
 233       sockaddr = g_inet_socket_address_new (iaddr, g_ntohs (addr->sin6_port));
 234       g_object_unref (iaddr);
 235       return sockaddr;
 236     }
 237
 238 #ifdef G_OS_UNIX
 239   if (family == AF_UNIX)
 240     {
 241       struct sockaddr_un *addr = (struct sockaddr_un *) native;
 242
 243       return g_unix_socket_address_new (addr->sun_path);
 244     }
 245 #endif
 246
 247   return NULL;
 248 }
 249
 250
 251 #define G_TYPE_SOCKET_ADDRESS_ADDRESS_ENUMERATOR (_g_socket_address_address_enumerator_get_type ())
 252 #define G_SOCKET_ADDRESS_ADDRESS_ENUMERATOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), G_TYPE_SOCKET_ADDRESS_ADDRESS_ENUMERATOR, GSocketAddressAddressEnumerator))
 253
 254 typedef struct {
 255   GSocketAddressEnumerator parent_instance;
 256
 257   GSocketAddress *sockaddr;
 258 } GSocketAddressAddressEnumerator;
 259
 260 typedef struct {
 261   GSocketAddressEnumeratorClass parent_class;
 262
 263 } GSocketAddressAddressEnumeratorClass;
 264
 265 G_DEFINE_TYPE (GSocketAddressAddressEnumerator, _g_socket_address_address_enumerator, G_TYPE_SOCKET_ADDRESS_ENUMERATOR)
 266
 267 static void
 268 g_socket_address_address_enumerator_finalize (GObject *object)
 269 {
 270   GSocketAddressAddressEnumerator *sockaddr_enum =
 271     G_SOCKET_ADDRESS_ADDRESS_ENUMERATOR (object);
 272
 273   if (sockaddr_enum->sockaddr)
 274     g_object_unref (sockaddr_enum->sockaddr);
 275
 276   G_OBJECT_CLASS (_g_socket_address_address_enumerator_parent_class)->finalize (object);
 277 }
 278
 279 static GSocketAddress *
 280 g_socket_address_address_enumerator_next (GSocketAddressEnumerator  *enumerator,
 281                                           GCancellable              *cancellable,
 282                                           GError                   **error)
 283 {
 284   GSocketAddressAddressEnumerator *sockaddr_enum =
 285     G_SOCKET_ADDRESS_ADDRESS_ENUMERATOR (enumerator);
 286
 287   if (sockaddr_enum->sockaddr)
 288     {
 289       GSocketAddress *ret = sockaddr_enum->sockaddr;
 290
 291       sockaddr_enum->sockaddr = NULL;
 292       return ret;
 293     }
 294   else
 295     return NULL;
 296 }
 297
 298 static void
 299 _g_socket_address_address_enumerator_init (GSocketAddressAddressEnumerator *enumerator)
 300 {
 301 }
 302
 303 static void
 304 _g_socket_address_address_enumerator_class_init (GSocketAddressAddressEnumeratorClass *sockaddrenum_class)
 305 {
 306   GObjectClass *object_class = G_OBJECT_CLASS (sockaddrenum_class);
 307   GSocketAddressEnumeratorClass *enumerator_class =
 308     G_SOCKET_ADDRESS_ENUMERATOR_CLASS (sockaddrenum_class);
 309
 310   enumerator_class->next = g_socket_address_address_enumerator_next;
 311   object_class->finalize = g_socket_address_address_enumerator_finalize;
 312 }
 313
 314 static GSocketAddressEnumerator *
 315 g_socket_address_connectable_enumerate (GSocketConnectable *connectable)
 316 {
 317   GSocketAddressAddressEnumerator *sockaddr_enum;
 318
 319   sockaddr_enum = g_object_new (G_TYPE_SOCKET_ADDRESS_ADDRESS_ENUMERATOR, NULL);
 320   sockaddr_enum->sockaddr = g_object_ref (connectable);
 321
 322   return (GSocketAddressEnumerator *)sockaddr_enum;
 323 }
 324
 325 #define __G_SOCKET_ADDRESS_C__
 326 #include "gioaliasdef.c"