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glib/gio/gnetworkaddress.c
Dan Winship 64f9bf96fd gnetworkaddress: Add g_network_address_new_loopback() constructor 
This is a convenience method for creating a GNetworkAddress which is
guaranteed to return IPv4 and IPv6 loopback addresses. The program
cannot guarantee that 'localhost' will resolve to both types of
address, so programs which wish to connect to a local service over
either IPv4 or IPv6 must currently manually create an IPv4 and another
IPv6 socket, and detect which of the two are working. This new API
allows the existing GSocketConnectable machinery to be used to
automate that.

Based on a patch from Philip Withnall.

https://bugzilla.gnome.org/show_bug.cgi?id=732317
2014-11-29 14:22:42 -05:00

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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2008 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 <glib.h>
#include "glibintl.h"
#include <stdlib.h>
#include "gnetworkaddress.h"
#include "gasyncresult.h"
#include "ginetaddress.h"
#include "ginetsocketaddress.h"
#include "gnetworkingprivate.h"
#include "gproxyaddressenumerator.h"
#include "gresolver.h"
#include "gtask.h"
#include "gsocketaddressenumerator.h"
#include "gioerror.h"
#include "gsocketconnectable.h"
#include <string.h>
/**
* SECTION:gnetworkaddress
* @short_description: A GSocketConnectable for resolving hostnames
* @include: gio/gio.h
*
* #GNetworkAddress provides an easy way to resolve a hostname and
* then attempt to connect to that host, handling the possibility of
* multiple IP addresses and multiple address families.
*
* See #GSocketConnectable for and example of using the connectable
* interface.
*/
/**
* GNetworkAddress:
*
* A #GSocketConnectable for resolving a hostname and connecting to
* that host.
*/
struct _GNetworkAddressPrivate {
gchar *hostname;
guint16 port;
GList *sockaddrs;
gchar *scheme;
gint64 resolver_serial;
};
enum {
PROP_0,
PROP_HOSTNAME,
PROP_PORT,
PROP_SCHEME,
};
static void g_network_address_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void g_network_address_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void g_network_address_connectable_iface_init (GSocketConnectableIface *iface);
static GSocketAddressEnumerator *g_network_address_connectable_enumerate (GSocketConnectable *connectable);
static GSocketAddressEnumerator *g_network_address_connectable_proxy_enumerate (GSocketConnectable *connectable);
G_DEFINE_TYPE_WITH_CODE (GNetworkAddress, g_network_address, G_TYPE_OBJECT,
G_ADD_PRIVATE (GNetworkAddress)
G_IMPLEMENT_INTERFACE (G_TYPE_SOCKET_CONNECTABLE,
g_network_address_connectable_iface_init))
static void
g_network_address_finalize (GObject *object)
{
GNetworkAddress *addr = G_NETWORK_ADDRESS (object);
g_free (addr->priv->hostname);
g_free (addr->priv->scheme);
if (addr->priv->sockaddrs)
{
GList *a;
for (a = addr->priv->sockaddrs; a; a = a->next)
g_object_unref (a->data);
g_list_free (addr->priv->sockaddrs);
}
G_OBJECT_CLASS (g_network_address_parent_class)->finalize (object);
}
static void
g_network_address_class_init (GNetworkAddressClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->set_property = g_network_address_set_property;
gobject_class->get_property = g_network_address_get_property;
gobject_class->finalize = g_network_address_finalize;
g_object_class_install_property (gobject_class, PROP_HOSTNAME,
g_param_spec_string ("hostname",
P_("Hostname"),
P_("Hostname to resolve"),
NULL,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_PORT,
g_param_spec_uint ("port",
P_("Port"),
P_("Network port"),
0, 65535, 0,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SCHEME,
g_param_spec_string ("scheme",
P_("Scheme"),
P_("URI Scheme"),
NULL,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
}
static void
g_network_address_connectable_iface_init (GSocketConnectableIface *connectable_iface)
{
connectable_iface->enumerate = g_network_address_connectable_enumerate;
connectable_iface->proxy_enumerate = g_network_address_connectable_proxy_enumerate;
}
static void
g_network_address_init (GNetworkAddress *addr)
{
addr->priv = g_network_address_get_instance_private (addr);
}
static void
g_network_address_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GNetworkAddress *addr = G_NETWORK_ADDRESS (object);
switch (prop_id)
{
case PROP_HOSTNAME:
g_free (addr->priv->hostname);
addr->priv->hostname = g_value_dup_string (value);
break;
case PROP_PORT:
addr->priv->port = g_value_get_uint (value);
break;
case PROP_SCHEME:
g_free (addr->priv->scheme);
addr->priv->scheme = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
g_network_address_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GNetworkAddress *addr = G_NETWORK_ADDRESS (object);
switch (prop_id)
{
case PROP_HOSTNAME:
g_value_set_string (value, addr->priv->hostname);
break;
case PROP_PORT:
g_value_set_uint (value, addr->priv->port);
break;
case PROP_SCHEME:
g_value_set_string (value, addr->priv->scheme);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
g_network_address_set_addresses (GNetworkAddress *addr,
GList *addresses,
guint64 resolver_serial)
{
GList *a;
GSocketAddress *sockaddr;
g_return_if_fail (addresses != NULL && addr->priv->sockaddrs == NULL);
for (a = addresses; a; a = a->next)
{
sockaddr = g_inet_socket_address_new (a->data, addr->priv->port);
addr->priv->sockaddrs = g_list_prepend (addr->priv->sockaddrs, sockaddr);
g_object_unref (a->data);
}
g_list_free (addresses);
addr->priv->sockaddrs = g_list_reverse (addr->priv->sockaddrs);
addr->priv->resolver_serial = resolver_serial;
}
static gboolean
g_network_address_parse_sockaddr (GNetworkAddress *addr)
{
GSocketAddress *sockaddr;
sockaddr = g_inet_socket_address_new_from_string (addr->priv->hostname,
addr->priv->port);
if (sockaddr)
{
addr->priv->sockaddrs = g_list_prepend (addr->priv->sockaddrs, sockaddr);
return TRUE;
}
else
return FALSE;
}
/**
* g_network_address_new:
* @hostname: the hostname
* @port: the port
*
* Creates a new #GSocketConnectable for connecting to the given
* @hostname and @port.
*
* Note that depending on the configuration of the machine, a
* @hostname of `localhost` may refer to the IPv4 loopback address
* only, or to both IPv4 and IPv6; use
* g_network_address_new_loopback() to create a #GNetworkAddress that
* is guaranteed to resolve to both addresses.
*
* Returns: (transfer full) (type GNetworkAddress): the new #GNetworkAddress
*
* Since: 2.22
*/
GSocketConnectable *
g_network_address_new (const gchar *hostname,
guint16 port)
{
return g_object_new (G_TYPE_NETWORK_ADDRESS,
"hostname", hostname,
"port", port,
NULL);
}
/**
* g_network_address_new_loopback:
* @port: the port
*
* Creates a new #GSocketConnectable for connecting to the local host
* over a loopback connection to the given @port. This is intended for
* use in connecting to local services which may be running on IPv4 or
* IPv6.
*
* The connectable will return IPv4 and IPv6 loopback addresses,
* regardless of how the host resolves `localhost`. By contrast,
* g_network_address_new() will often only return an IPv4 address when
* resolving `localhost`, and an IPv6 address for `localhost6`.
*
* g_network_address_get_hostname() will always return `localhost` for
* #GNetworkAddresses created with this constructor.
*
* Returns: (transfer full) (type GNetworkAddress): the new #GNetworkAddress
*
* Since: 2.44
*/
GSocketConnectable *
g_network_address_new_loopback (guint16 port)
{
GNetworkAddress *addr;
GList *addrs = NULL;
addr = g_object_new (G_TYPE_NETWORK_ADDRESS,
"hostname", "localhost",
"port", port,
NULL);
addrs = g_list_append (addrs, g_inet_address_new_loopback (AF_INET6));
addrs = g_list_append (addrs, g_inet_address_new_loopback (AF_INET));
g_network_address_set_addresses (addr, addrs, 0);
return G_SOCKET_CONNECTABLE (addr);
}
/**
* g_network_address_parse:
* @host_and_port: the hostname and optionally a port
* @default_port: the default port if not in @host_and_port
* @error: a pointer to a #GError, or %NULL
*
* Creates a new #GSocketConnectable for connecting to the given
* @hostname and @port. May fail and return %NULL in case
* parsing @host_and_port fails.
*
* @host_and_port may be in any of a number of recognised formats; an IPv6
* address, an IPv4 address, or a domain name (in which case a DNS
* lookup is performed). Quoting with [] is supported for all address
* types. A port override may be specified in the usual way with a
* colon.
*
* If no port is specified in @host_and_port then @default_port will be
* used as the port number to connect to.
*
* In general, @host_and_port is expected to be provided by the user
* (allowing them to give the hostname, and a port overide if necessary)
* and @default_port is expected to be provided by the application.
*
* (The port component of @host_and_port can also be specified as a
* service name rather than as a numeric port, but this functionality
* is deprecated, because it depends on the contents of /etc/services,
* which is generally quite sparse on platforms other than Linux.)
*
* Returns: (transfer full): the new #GNetworkAddress, or %NULL on error
*
* Since: 2.22
*/
GSocketConnectable *
g_network_address_parse (const gchar *host_and_port,
guint16 default_port,
GError **error)
{
GSocketConnectable *connectable;
const gchar *port;
guint16 portnum;
gchar *name;
g_return_val_if_fail (host_and_port != NULL, NULL);
port = NULL;
if (host_and_port[0] == '[')
/* escaped host part (to allow, eg. "[2001:db8::1]:888") */
{
const gchar *end;
end = strchr (host_and_port, ']');
if (end == NULL)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
_("Hostname '%s' contains '[' but not ']'"), host_and_port);
return NULL;
}
if (end[1] == '\0')
port = NULL;
else if (end[1] == ':')
port = &end[2];
else
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
"The ']' character (in hostname '%s') must come at the"
" end or be immediately followed by ':' and a port",
host_and_port);
return NULL;
}
name = g_strndup (host_and_port + 1, end - host_and_port - 1);
}
else if ((port = strchr (host_and_port, ':')))
/* string has a ':' in it */
{
/* skip ':' */
port++;
if (strchr (port, ':'))
/* more than one ':' in string */
{
/* this is actually an unescaped IPv6 address */
name = g_strdup (host_and_port);
port = NULL;
}
else
name = g_strndup (host_and_port, port - host_and_port - 1);
}
else
/* plain hostname, no port */
name = g_strdup (host_and_port);
if (port != NULL)
{
if (port[0] == '\0')
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
"If a ':' character is given, it must be followed by a "
"port (in hostname '%s').", host_and_port);
g_free (name);
return NULL;
}
else if ('0' <= port[0] && port[0] <= '9')
{
char *end;
long value;
value = strtol (port, &end, 10);
if (*end != '\0' || value < 0 || value > G_MAXUINT16)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
"Invalid numeric port '%s' specified in hostname '%s'",
port, host_and_port);
g_free (name);
return NULL;
}
portnum = value;
}
else
{
struct servent *entry;
entry = getservbyname (port, "tcp");
if (entry == NULL)
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
"Unknown service '%s' specified in hostname '%s'",
port, host_and_port);
#ifdef HAVE_ENDSERVENT
endservent ();
#endif
g_free (name);
return NULL;
}
portnum = g_ntohs (entry->s_port);
#ifdef HAVE_ENDSERVENT
endservent ();
#endif
}
}
else
{
/* No port in host_and_port */
portnum = default_port;
}
connectable = g_network_address_new (name, portnum);
g_free (name);
return connectable;
}
/* Allowed characters outside alphanumeric for unreserved. */
#define G_URI_OTHER_UNRESERVED "-._~"
/* This or something equivalent will eventually go into glib/guri.h */
gboolean
_g_uri_parse_authority (const char *uri,
char **host,
guint16 *port,
char **userinfo)
{
char *tmp_str;
const char *start, *p, *at, *delim;
char c;
g_return_val_if_fail (uri != NULL, FALSE);
if (host)
*host = NULL;
if (port)
*port = 0;
if (userinfo)
*userinfo = NULL;
/* From RFC 3986 Decodes:
* URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
* hier-part = "//" authority path-abempty
* path-abempty = *( "/" segment )
* authority = [ userinfo "@" ] host [ ":" port ]
*/
/* Check we have a valid scheme */
tmp_str = g_uri_parse_scheme (uri);
if (tmp_str == NULL)
return FALSE;
g_free (tmp_str);
/* Decode hier-part:
* hier-part = "//" authority path-abempty
*/
p = uri;
start = strstr (p, "//");
if (start == NULL)
return FALSE;
start += 2;
/* check if the @ sign is part of the authority before attempting to
* decode the userinfo */
delim = strpbrk (start, "/?#[]");
at = strchr (start, '@');
if (at && delim && at > delim)
at = NULL;
if (at != NULL)
{
/* Decode userinfo:
* userinfo = *( unreserved / pct-encoded / sub-delims / ":" )
* unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
* pct-encoded = "%" HEXDIG HEXDIG
*/
p = start;
while (1)
{
c = *p++;
if (c == '@')
break;
/* pct-encoded */
if (c == '%')
{
if (!(g_ascii_isxdigit (p[0]) ||
g_ascii_isxdigit (p[1])))
return FALSE;
p++;
continue;
}
/* unreserved / sub-delims / : */
if (!(g_ascii_isalnum (c) ||
strchr (G_URI_OTHER_UNRESERVED, c) ||
strchr (G_URI_RESERVED_CHARS_SUBCOMPONENT_DELIMITERS, c) ||
c == ':'))
return FALSE;
}
if (userinfo)
*userinfo = g_strndup (start, p - start - 1);
start = p;
}
else
{
p = start;
}
/* decode host:
* host = IP-literal / IPv4address / reg-name
* reg-name = *( unreserved / pct-encoded / sub-delims )
*/
/* If IPv6 or IPvFuture */
if (*p == '[')
{
gboolean has_scope_id = FALSE, has_bad_scope_id = FALSE;
start++;
p++;
while (1)
{
c = *p++;
if (c == ']')
break;
if (c == '%' && !has_scope_id)
{
has_scope_id = TRUE;
if (p[0] != '2' || p[1] != '5')
has_bad_scope_id = TRUE;
continue;
}
/* unreserved / sub-delims */
if (!(g_ascii_isalnum (c) ||
strchr (G_URI_OTHER_UNRESERVED, c) ||
strchr (G_URI_RESERVED_CHARS_SUBCOMPONENT_DELIMITERS, c) ||
c == ':' ||
c == '.'))
goto error;
}
if (host)
{
if (has_bad_scope_id)
*host = g_strndup (start, p - start - 1);
else
*host = g_uri_unescape_segment (start, p - 1, NULL);
}
c = *p++;
}
else
{
while (1)
{
c = *p++;
if (c == ':' ||
c == '/' ||
c == '?' ||
c == '#' ||
c == '\0')
break;
/* pct-encoded */
if (c == '%')
{
if (!(g_ascii_isxdigit (p[0]) ||
g_ascii_isxdigit (p[1])))
goto error;
p++;
continue;
}
/* unreserved / sub-delims */
if (!(g_ascii_isalnum (c) ||
strchr (G_URI_OTHER_UNRESERVED, c) ||
strchr (G_URI_RESERVED_CHARS_SUBCOMPONENT_DELIMITERS, c)))
goto error;
}
if (host)
*host = g_uri_unescape_segment (start, p - 1, NULL);
}
if (c == ':')
{
/* Decode port:
* port = *DIGIT
*/
guint tmp = 0;
while (1)
{
c = *p++;
if (c == '/' ||
c == '?' ||
c == '#' ||
c == '\0')
break;
if (!g_ascii_isdigit (c))
goto error;
tmp = (tmp * 10) + (c - '0');
if (tmp > 65535)
goto error;
}
if (port)
*port = (guint16) tmp;
}
return TRUE;
error:
if (host && *host)
{
g_free (*host);
*host = NULL;
}
if (userinfo && *userinfo)
{
g_free (*userinfo);
*userinfo = NULL;
}
return FALSE;
}
gchar *
_g_uri_from_authority (const gchar *protocol,
const gchar *host,
guint port,
const gchar *userinfo)
{
GString *uri;
uri = g_string_new (protocol);
g_string_append (uri, "://");
if (userinfo)
{
g_string_append_uri_escaped (uri, userinfo, G_URI_RESERVED_CHARS_ALLOWED_IN_USERINFO, FALSE);
g_string_append_c (uri, '@');
}
if (g_hostname_is_non_ascii (host))
{
gchar *ace_encoded = g_hostname_to_ascii (host);
if (!ace_encoded)
{
g_string_free (uri, TRUE);
return NULL;
}
g_string_append (uri, ace_encoded);
g_free (ace_encoded);
}
else if (strchr (host, ':'))
g_string_append_printf (uri, "[%s]", host);
else
g_string_append (uri, host);
if (port != 0)
g_string_append_printf (uri, ":%u", port);
return g_string_free (uri, FALSE);
}
/**
* g_network_address_parse_uri:
* @uri: the hostname and optionally a port
* @default_port: The default port if none is found in the URI
* @error: a pointer to a #GError, or %NULL
*
* Creates a new #GSocketConnectable for connecting to the given
* @uri. May fail and return %NULL in case parsing @uri fails.
*
* Using this rather than g_network_address_new() or
* g_network_address_parse() allows #GSocketClient to determine
* when to use application-specific proxy protocols.
*
* Returns: (transfer full): the new #GNetworkAddress, or %NULL on error
*
* Since: 2.26
*/
GSocketConnectable *
g_network_address_parse_uri (const gchar *uri,
guint16 default_port,
GError **error)
{
GSocketConnectable *conn;
gchar *scheme;
gchar *hostname;
guint16 port;
if (!_g_uri_parse_authority (uri, &hostname, &port, NULL))
{
g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_ARGUMENT,
"Invalid URI '%s'",
uri);
return NULL;
}
if (port == 0)
port = default_port;
scheme = g_uri_parse_scheme (uri);
conn = g_object_new (G_TYPE_NETWORK_ADDRESS,
"hostname", hostname,
"port", port,
"scheme", scheme,
NULL);
g_free (scheme);
g_free (hostname);
return conn;
}
/**
* g_network_address_get_hostname:
* @addr: a #GNetworkAddress
*
* Gets @addr's hostname. This might be either UTF-8 or ASCII-encoded,
* depending on what @addr was created with.
*
* Returns: @addr's hostname
*
* Since: 2.22
*/
const gchar *
g_network_address_get_hostname (GNetworkAddress *addr)
{
g_return_val_if_fail (G_IS_NETWORK_ADDRESS (addr), NULL);
return addr->priv->hostname;
}
/**
* g_network_address_get_port:
* @addr: a #GNetworkAddress
*
* Gets @addr's port number
*
* Returns: @addr's port (which may be 0)
*
* Since: 2.22
*/
guint16
g_network_address_get_port (GNetworkAddress *addr)
{
g_return_val_if_fail (G_IS_NETWORK_ADDRESS (addr), 0);
return addr->priv->port;
}
/**
* g_network_address_get_scheme:
* @addr: a #GNetworkAddress
*
* Gets @addr's scheme
*
* Returns: @addr's scheme (%NULL if not built from URI)
*
* Since: 2.26
*/
const gchar *
g_network_address_get_scheme (GNetworkAddress *addr)
{
g_return_val_if_fail (G_IS_NETWORK_ADDRESS (addr), NULL);
return addr->priv->scheme;
}
#define G_TYPE_NETWORK_ADDRESS_ADDRESS_ENUMERATOR (_g_network_address_address_enumerator_get_type ())
#define G_NETWORK_ADDRESS_ADDRESS_ENUMERATOR(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), G_TYPE_NETWORK_ADDRESS_ADDRESS_ENUMERATOR, GNetworkAddressAddressEnumerator))
typedef struct {
GSocketAddressEnumerator parent_instance;
GNetworkAddress *addr;
GList *addresses;
GList *next;
} GNetworkAddressAddressEnumerator;
typedef struct {
GSocketAddressEnumeratorClass parent_class;
} GNetworkAddressAddressEnumeratorClass;
static GType _g_network_address_address_enumerator_get_type (void);
G_DEFINE_TYPE (GNetworkAddressAddressEnumerator, _g_network_address_address_enumerator, G_TYPE_SOCKET_ADDRESS_ENUMERATOR)
static void
g_network_address_address_enumerator_finalize (GObject *object)
{
GNetworkAddressAddressEnumerator *addr_enum =
G_NETWORK_ADDRESS_ADDRESS_ENUMERATOR (object);
g_object_unref (addr_enum->addr);
G_OBJECT_CLASS (_g_network_address_address_enumerator_parent_class)->finalize (object);
}
static GSocketAddress *
g_network_address_address_enumerator_next (GSocketAddressEnumerator *enumerator,
GCancellable *cancellable,
GError **error)
{
GNetworkAddressAddressEnumerator *addr_enum =
G_NETWORK_ADDRESS_ADDRESS_ENUMERATOR (enumerator);
GSocketAddress *sockaddr;
if (addr_enum->addresses == NULL)
{
GNetworkAddress *addr = addr_enum->addr;
GResolver *resolver = g_resolver_get_default ();
gint64 serial = g_resolver_get_serial (resolver);
if (addr->priv->resolver_serial != 0 &&
addr->priv->resolver_serial != serial)
{
/* Resolver has reloaded, discard cached addresses */
g_list_free_full (addr->priv->sockaddrs, g_object_unref);
addr->priv->sockaddrs = NULL;
}
if (!addr->priv->sockaddrs)
g_network_address_parse_sockaddr (addr);
if (!addr->priv->sockaddrs)
{
GList *addresses;
addresses = g_resolver_lookup_by_name (resolver,
addr->priv->hostname,
cancellable, error);
if (!addresses)
{
g_object_unref (resolver);
return NULL;
}
g_network_address_set_addresses (addr, addresses, serial);
}
addr_enum->addresses = addr->priv->sockaddrs;
addr_enum->next = addr_enum->addresses;
g_object_unref (resolver);
}
if (addr_enum->next == NULL)
return NULL;
sockaddr = addr_enum->next->data;
addr_enum->next = addr_enum->next->next;
return g_object_ref (sockaddr);
}
static void
have_addresses (GNetworkAddressAddressEnumerator *addr_enum,
GTask *task, GError *error)
{
GSocketAddress *sockaddr;
addr_enum->addresses = addr_enum->addr->priv->sockaddrs;
addr_enum->next = addr_enum->addresses;
if (addr_enum->next)
{
sockaddr = g_object_ref (addr_enum->next->data);
addr_enum->next = addr_enum->next->next;
}
else
sockaddr = NULL;
if (error)
g_task_return_error (task, error);
else
g_task_return_pointer (task, sockaddr, g_object_unref);
g_object_unref (task);
}
static void
got_addresses (GObject *source_object,
GAsyncResult *result,
gpointer user_data)
{
GTask *task = user_data;
GNetworkAddressAddressEnumerator *addr_enum = g_task_get_source_object (task);
GResolver *resolver = G_RESOLVER (source_object);
GList *addresses;
GError *error = NULL;
if (!addr_enum->addr->priv->sockaddrs)
{
addresses = g_resolver_lookup_by_name_finish (resolver, result, &error);
if (!error)
{
g_network_address_set_addresses (addr_enum->addr, addresses,
g_resolver_get_serial (resolver));
}
}
have_addresses (addr_enum, task, error);
}
static void
g_network_address_address_enumerator_next_async (GSocketAddressEnumerator *enumerator,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GNetworkAddressAddressEnumerator *addr_enum =
G_NETWORK_ADDRESS_ADDRESS_ENUMERATOR (enumerator);
GSocketAddress *sockaddr;
GTask *task;
task = g_task_new (addr_enum, cancellable, callback, user_data);
if (addr_enum->addresses == NULL)
{
GNetworkAddress *addr = addr_enum->addr;
GResolver *resolver = g_resolver_get_default ();
gint64 serial = g_resolver_get_serial (resolver);
if (addr->priv->resolver_serial != 0 &&
addr->priv->resolver_serial != serial)
{
/* Resolver has reloaded, discard cached addresses */
g_list_free_full (addr->priv->sockaddrs, g_object_unref);
addr->priv->sockaddrs = NULL;
}
if (!addr->priv->sockaddrs)
{
if (g_network_address_parse_sockaddr (addr))
have_addresses (addr_enum, task, NULL);
else
{
g_resolver_lookup_by_name_async (resolver,
addr->priv->hostname,
cancellable,
got_addresses, task);
}
g_object_unref (resolver);
return;
}
addr_enum->addresses = addr->priv->sockaddrs;
addr_enum->next = addr_enum->addresses;
g_object_unref (resolver);
}
if (addr_enum->next)
{
sockaddr = g_object_ref (addr_enum->next->data);
addr_enum->next = addr_enum->next->next;
}
else
sockaddr = NULL;
g_task_return_pointer (task, sockaddr, g_object_unref);
g_object_unref (task);
}
static GSocketAddress *
g_network_address_address_enumerator_next_finish (GSocketAddressEnumerator *enumerator,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (g_task_is_valid (result, enumerator), NULL);
return g_task_propagate_pointer (G_TASK (result), error);
}
static void
_g_network_address_address_enumerator_init (GNetworkAddressAddressEnumerator *enumerator)
{
}
static void
_g_network_address_address_enumerator_class_init (GNetworkAddressAddressEnumeratorClass *addrenum_class)
{
GObjectClass *object_class = G_OBJECT_CLASS (addrenum_class);
GSocketAddressEnumeratorClass *enumerator_class =
G_SOCKET_ADDRESS_ENUMERATOR_CLASS (addrenum_class);
enumerator_class->next = g_network_address_address_enumerator_next;
enumerator_class->next_async = g_network_address_address_enumerator_next_async;
enumerator_class->next_finish = g_network_address_address_enumerator_next_finish;
object_class->finalize = g_network_address_address_enumerator_finalize;
}
static GSocketAddressEnumerator *
g_network_address_connectable_enumerate (GSocketConnectable *connectable)
{
GNetworkAddressAddressEnumerator *addr_enum;
addr_enum = g_object_new (G_TYPE_NETWORK_ADDRESS_ADDRESS_ENUMERATOR, NULL);
addr_enum->addr = g_object_ref (connectable);
return (GSocketAddressEnumerator *)addr_enum;
}
static GSocketAddressEnumerator *
g_network_address_connectable_proxy_enumerate (GSocketConnectable *connectable)
{
GNetworkAddress *self = G_NETWORK_ADDRESS (connectable);
GSocketAddressEnumerator *proxy_enum;
gchar *uri;
uri = _g_uri_from_authority (self->priv->scheme ? self->priv->scheme : "none",
self->priv->hostname,
self->priv->port,
NULL);
proxy_enum = g_object_new (G_TYPE_PROXY_ADDRESS_ENUMERATOR,
"connectable", connectable,
"uri", uri,
NULL);
g_free (uri);
return proxy_enum;
}
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