Import Upstream version 2.72.4
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473
gio/ginetaddressmask.c
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473
gio/ginetaddressmask.c
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/* GIO - GLib Input, Output and Streaming Library
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*
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* Copyright 2011 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <string.h>
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#include "ginetaddressmask.h"
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#include "ginetaddress.h"
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#include "ginitable.h"
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#include "gioerror.h"
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#include "gioenumtypes.h"
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#include "glibintl.h"
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/**
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* SECTION:ginetaddressmask
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* @short_description: An IPv4/IPv6 address mask
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* @include: gio/gio.h
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*
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* #GInetAddressMask represents a range of IPv4 or IPv6 addresses
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* described by a base address and a length indicating how many bits
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* of the base address are relevant for matching purposes. These are
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* often given in string form. Eg, "10.0.0.0/8", or "fe80::/10".
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*/
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/**
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* GInetAddressMask:
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*
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* A combination of an IPv4 or IPv6 base address and a length,
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* representing a range of IP addresses.
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*
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* Since: 2.32
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*/
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struct _GInetAddressMaskPrivate
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{
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GInetAddress *addr;
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guint length;
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};
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static void g_inet_address_mask_initable_iface_init (GInitableIface *iface);
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G_DEFINE_TYPE_WITH_CODE (GInetAddressMask, g_inet_address_mask, G_TYPE_OBJECT,
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G_ADD_PRIVATE (GInetAddressMask)
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G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE,
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g_inet_address_mask_initable_iface_init))
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enum
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{
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PROP_0,
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PROP_FAMILY,
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PROP_ADDRESS,
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PROP_LENGTH
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};
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static void
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g_inet_address_mask_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GInetAddressMask *mask = G_INET_ADDRESS_MASK (object);
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switch (prop_id)
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{
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case PROP_ADDRESS:
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if (mask->priv->addr)
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g_object_unref (mask->priv->addr);
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mask->priv->addr = g_value_dup_object (value);
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break;
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case PROP_LENGTH:
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mask->priv->length = g_value_get_uint (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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g_inet_address_mask_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GInetAddressMask *mask = G_INET_ADDRESS_MASK (object);
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switch (prop_id)
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{
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case PROP_FAMILY:
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g_value_set_enum (value, g_inet_address_get_family (mask->priv->addr));
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break;
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case PROP_ADDRESS:
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g_value_set_object (value, mask->priv->addr);
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break;
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case PROP_LENGTH:
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g_value_set_uint (value, mask->priv->length);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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}
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}
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static void
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g_inet_address_mask_dispose (GObject *object)
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{
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GInetAddressMask *mask = G_INET_ADDRESS_MASK (object);
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g_clear_object (&mask->priv->addr);
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G_OBJECT_CLASS (g_inet_address_mask_parent_class)->dispose (object);
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}
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static void
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g_inet_address_mask_class_init (GInetAddressMaskClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->set_property = g_inet_address_mask_set_property;
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gobject_class->get_property = g_inet_address_mask_get_property;
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gobject_class->dispose = g_inet_address_mask_dispose;
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g_object_class_install_property (gobject_class, PROP_FAMILY,
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g_param_spec_enum ("family",
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P_("Address family"),
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P_("The address family (IPv4 or IPv6)"),
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G_TYPE_SOCKET_FAMILY,
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G_SOCKET_FAMILY_INVALID,
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G_PARAM_READABLE |
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G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_ADDRESS,
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g_param_spec_object ("address",
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P_("Address"),
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P_("The base address"),
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G_TYPE_INET_ADDRESS,
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G_PARAM_READWRITE |
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G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_LENGTH,
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g_param_spec_uint ("length",
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P_("Length"),
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P_("The prefix length"),
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0, 128, 0,
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G_PARAM_READWRITE |
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G_PARAM_STATIC_STRINGS));
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}
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static gboolean
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g_inet_address_mask_initable_init (GInitable *initable,
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GCancellable *cancellable,
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GError **error)
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{
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GInetAddressMask *mask = G_INET_ADDRESS_MASK (initable);
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guint addrlen, nbytes, nbits;
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const guint8 *bytes;
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gboolean ok;
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if (!mask->priv->addr)
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{
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g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
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_("No address specified"));
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return FALSE;
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}
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addrlen = g_inet_address_get_native_size (mask->priv->addr);
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if (mask->priv->length > addrlen * 8)
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{
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
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_("Length %u is too long for address"),
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mask->priv->length);
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return FALSE;
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}
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/* Make sure all the bits after @length are 0 */
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bytes = g_inet_address_to_bytes (mask->priv->addr);
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ok = TRUE;
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nbytes = mask->priv->length / 8;
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bytes += nbytes;
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addrlen -= nbytes;
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nbits = mask->priv->length % 8;
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if (nbits)
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{
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if (bytes[0] & (0xFF >> nbits))
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ok = FALSE;
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bytes++;
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addrlen--;
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}
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while (addrlen)
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{
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if (bytes[0])
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ok = FALSE;
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bytes++;
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addrlen--;
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}
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if (!ok)
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{
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g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
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_("Address has bits set beyond prefix length"));
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return FALSE;
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}
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return TRUE;
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}
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static void
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g_inet_address_mask_initable_iface_init (GInitableIface *iface)
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{
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iface->init = g_inet_address_mask_initable_init;
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}
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static void
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g_inet_address_mask_init (GInetAddressMask *mask)
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{
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mask->priv = g_inet_address_mask_get_instance_private (mask);
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}
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/**
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* g_inet_address_mask_new:
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* @addr: a #GInetAddress
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* @length: number of bits of @addr to use
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* @error: return location for #GError, or %NULL
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*
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* Creates a new #GInetAddressMask representing all addresses whose
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* first @length bits match @addr.
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*
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* Returns: a new #GInetAddressMask, or %NULL on error
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*
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* Since: 2.32
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*/
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GInetAddressMask *
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g_inet_address_mask_new (GInetAddress *addr,
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guint length,
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GError **error)
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{
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return g_initable_new (G_TYPE_INET_ADDRESS_MASK, NULL, error,
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"address", addr,
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"length", length,
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NULL);
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}
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/**
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* g_inet_address_mask_new_from_string:
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* @mask_string: an IP address or address/length string
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* @error: return location for #GError, or %NULL
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*
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* Parses @mask_string as an IP address and (optional) length, and
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* creates a new #GInetAddressMask. The length, if present, is
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* delimited by a "/". If it is not present, then the length is
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* assumed to be the full length of the address.
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*
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* Returns: a new #GInetAddressMask corresponding to @string, or %NULL
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* on error.
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*
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* Since: 2.32
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*/
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GInetAddressMask *
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g_inet_address_mask_new_from_string (const gchar *mask_string,
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GError **error)
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{
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GInetAddressMask *mask;
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GInetAddress *addr;
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gchar *slash;
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guint length;
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slash = strchr (mask_string, '/');
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if (slash)
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{
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gchar *address, *end;
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length = strtoul (slash + 1, &end, 10);
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if (*end || !*(slash + 1))
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{
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parse_error:
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
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_("Could not parse “%s” as IP address mask"),
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mask_string);
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return NULL;
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}
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address = g_strndup (mask_string, slash - mask_string);
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addr = g_inet_address_new_from_string (address);
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g_free (address);
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if (!addr)
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goto parse_error;
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}
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else
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{
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addr = g_inet_address_new_from_string (mask_string);
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if (!addr)
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goto parse_error;
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length = g_inet_address_get_native_size (addr) * 8;
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}
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mask = g_inet_address_mask_new (addr, length, error);
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g_object_unref (addr);
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return mask;
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}
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/**
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* g_inet_address_mask_to_string:
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* @mask: a #GInetAddressMask
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*
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* Converts @mask back to its corresponding string form.
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*
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* Returns: a string corresponding to @mask.
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*
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* Since: 2.32
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*/
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gchar *
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g_inet_address_mask_to_string (GInetAddressMask *mask)
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{
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gchar *addr_string, *mask_string;
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g_return_val_if_fail (G_IS_INET_ADDRESS_MASK (mask), NULL);
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addr_string = g_inet_address_to_string (mask->priv->addr);
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if (mask->priv->length == (g_inet_address_get_native_size (mask->priv->addr) * 8))
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return addr_string;
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mask_string = g_strdup_printf ("%s/%u", addr_string, mask->priv->length);
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g_free (addr_string);
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return mask_string;
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}
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/**
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* g_inet_address_mask_get_family:
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* @mask: a #GInetAddressMask
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*
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* Gets the #GSocketFamily of @mask's address
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*
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* Returns: the #GSocketFamily of @mask's address
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*
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* Since: 2.32
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*/
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GSocketFamily
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g_inet_address_mask_get_family (GInetAddressMask *mask)
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{
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g_return_val_if_fail (G_IS_INET_ADDRESS_MASK (mask), G_SOCKET_FAMILY_INVALID);
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return g_inet_address_get_family (mask->priv->addr);
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}
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/**
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* g_inet_address_mask_get_address:
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* @mask: a #GInetAddressMask
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*
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* Gets @mask's base address
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*
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* Returns: (transfer none): @mask's base address
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*
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* Since: 2.32
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*/
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GInetAddress *
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g_inet_address_mask_get_address (GInetAddressMask *mask)
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{
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g_return_val_if_fail (G_IS_INET_ADDRESS_MASK (mask), NULL);
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return mask->priv->addr;
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}
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/**
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* g_inet_address_mask_get_length:
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* @mask: a #GInetAddressMask
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*
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* Gets @mask's length
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*
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* Returns: @mask's length
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*
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* Since: 2.32
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*/
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guint
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g_inet_address_mask_get_length (GInetAddressMask *mask)
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{
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g_return_val_if_fail (G_IS_INET_ADDRESS_MASK (mask), 0);
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return mask->priv->length;
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}
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/**
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* g_inet_address_mask_matches:
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* @mask: a #GInetAddressMask
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* @address: a #GInetAddress
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*
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* Tests if @address falls within the range described by @mask.
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*
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* Returns: whether @address falls within the range described by
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* @mask.
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*
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* Since: 2.32
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*/
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gboolean
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g_inet_address_mask_matches (GInetAddressMask *mask,
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GInetAddress *address)
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{
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const guint8 *maskbytes, *addrbytes;
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int nbytes, nbits;
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g_return_val_if_fail (G_IS_INET_ADDRESS_MASK (mask), FALSE);
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g_return_val_if_fail (G_IS_INET_ADDRESS (address), FALSE);
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if (g_inet_address_get_family (mask->priv->addr) !=
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g_inet_address_get_family (address))
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return FALSE;
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if (mask->priv->length == 0)
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return TRUE;
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maskbytes = g_inet_address_to_bytes (mask->priv->addr);
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addrbytes = g_inet_address_to_bytes (address);
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nbytes = mask->priv->length / 8;
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if (nbytes != 0 && memcmp (maskbytes, addrbytes, nbytes) != 0)
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return FALSE;
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nbits = mask->priv->length % 8;
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if (nbits == 0)
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return TRUE;
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return maskbytes[nbytes] == (addrbytes[nbytes] & (0xFF << (8 - nbits)));
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}
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/**
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* g_inet_address_mask_equal:
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* @mask: a #GInetAddressMask
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* @mask2: another #GInetAddressMask
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*
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* Tests if @mask and @mask2 are the same mask.
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*
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* Returns: whether @mask and @mask2 are the same mask
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*
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* Since: 2.32
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*/
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gboolean
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g_inet_address_mask_equal (GInetAddressMask *mask,
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GInetAddressMask *mask2)
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{
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g_return_val_if_fail (G_IS_INET_ADDRESS_MASK (mask), FALSE);
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g_return_val_if_fail (G_IS_INET_ADDRESS_MASK (mask2), FALSE);
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return ((mask->priv->length == mask2->priv->length) &&
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g_inet_address_equal (mask->priv->addr, mask2->priv->addr));
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}
|
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