| /* -*- 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, write to the |
| * Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
| * Boston, MA 02111-1307, USA. |
| */ |
| |
| #include "config.h" |
| #include <glib.h> |
| #include "glibintl.h" |
| |
| #include "gresolver.h" |
| #include "gnetworkingprivate.h" |
| #include "gasyncresult.h" |
| #include "ginetaddress.h" |
| #include "ginetsocketaddress.h" |
| #include "gsimpleasyncresult.h" |
| #include "gsrvtarget.h" |
| |
| #ifdef G_OS_UNIX |
| #include "gunixresolver.h" |
| #include <sys/stat.h> |
| #endif |
| #ifdef G_OS_WIN32 |
| #include "gwin32resolver.h" |
| #endif |
| |
| #include <stdlib.h> |
| |
| #include "gioalias.h" |
| |
| /** |
| * SECTION:gresolver |
| * @short_description: Asynchronous and cancellable DNS resolver |
| * @include: gio/gio.h |
| * |
| * #GResolver provides cancellable synchronous and asynchronous DNS |
| * resolution, for hostnames (g_resolver_lookup_by_address(), |
| * g_resolver_lookup_by_name() and their async variants) and SRV |
| * (service) records (g_resolver_lookup_service()). |
| * |
| * #GNetworkAddress and #GNetworkService provide wrappers around |
| * #GResolver functionality that also implement #GSocketConnectable, |
| * making it easy to connect to a remote host/service. |
| */ |
| |
| enum { |
| RELOAD, |
| LAST_SIGNAL |
| }; |
| |
| static guint signals[LAST_SIGNAL] = { 0 }; |
| |
| struct _GResolverPrivate { |
| #ifdef G_OS_UNIX |
| time_t resolv_conf_timestamp; |
| #else |
| int dummy; |
| #endif |
| }; |
| |
| /** |
| * GResolver: |
| * |
| * The object that handles DNS resolution. Use g_resolver_get_default() |
| * to get the default resolver. |
| */ |
| G_DEFINE_TYPE (GResolver, g_resolver, G_TYPE_OBJECT) |
| |
| static void |
| g_resolver_class_init (GResolverClass *resolver_class) |
| { |
| volatile GType type; |
| |
| g_type_class_add_private (resolver_class, sizeof (GResolverPrivate)); |
| |
| /* Make sure _g_networking_init() has been called */ |
| type = g_inet_address_get_type (); |
| |
| /* Initialize _g_resolver_addrinfo_hints */ |
| #ifdef AI_ADDRCONFIG |
| _g_resolver_addrinfo_hints.ai_flags |= AI_ADDRCONFIG; |
| #endif |
| /* These two don't actually matter, they just get copied into the |
| * returned addrinfo structures (and then we ignore them). But if |
| * we leave them unset, we'll get back duplicate answers. |
| */ |
| _g_resolver_addrinfo_hints.ai_socktype = SOCK_STREAM; |
| _g_resolver_addrinfo_hints.ai_protocol = IPPROTO_TCP; |
| |
| /** |
| * GResolver::reload: |
| * @resolver: a #GResolver |
| * |
| * Emitted when the resolver notices that the system resolver |
| * configuration has changed. |
| **/ |
| signals[RELOAD] = |
| g_signal_new (I_("reload"), |
| G_TYPE_RESOLVER, |
| G_SIGNAL_RUN_LAST, |
| G_STRUCT_OFFSET (GResolverClass, reload), |
| NULL, NULL, |
| g_cclosure_marshal_VOID__VOID, |
| G_TYPE_NONE, 0); |
| } |
| |
| static void |
| g_resolver_init (GResolver *resolver) |
| { |
| #ifdef G_OS_UNIX |
| struct stat st; |
| #endif |
| |
| resolver->priv = G_TYPE_INSTANCE_GET_PRIVATE (resolver, G_TYPE_RESOLVER, GResolverPrivate); |
| |
| #ifdef G_OS_UNIX |
| if (stat (_PATH_RESCONF, &st) == 0) |
| resolver->priv->resolv_conf_timestamp = st.st_mtime; |
| #endif |
| } |
| |
| static GResolver *default_resolver; |
| |
| /** |
| * g_resolver_get_default: |
| * |
| * Gets the default #GResolver. You should unref it when you are done |
| * with it. #GResolver may use its reference count as a hint about how |
| * many threads/processes, etc it should allocate for concurrent DNS |
| * resolutions. |
| * |
| * Return value: the default #GResolver. |
| * |
| * Since: 2.22 |
| */ |
| GResolver * |
| g_resolver_get_default (void) |
| { |
| if (!default_resolver) |
| { |
| if (g_thread_supported ()) |
| default_resolver = g_object_new (G_TYPE_THREADED_RESOLVER, NULL); |
| else |
| { |
| #if defined(G_OS_UNIX) |
| default_resolver = g_object_new (G_TYPE_UNIX_RESOLVER, NULL); |
| #elif defined(G_OS_WIN32) |
| default_resolver = g_object_new (G_TYPE_WIN32_RESOLVER, NULL); |
| #endif |
| } |
| } |
| |
| return g_object_ref (default_resolver); |
| } |
| |
| /** |
| * g_resolver_set_default: |
| * @resolver: the new default #GResolver |
| * |
| * Sets @resolver to be the application's default resolver (reffing |
| * @resolver, and unreffing the previous default resolver, if any). |
| * Future calls to g_resolver_get_default() will return this resolver. |
| * |
| * This can be used if an application wants to perform any sort of DNS |
| * caching or "pinning"; it can implement its own #GResolver that |
| * calls the original default resolver for DNS operations, and |
| * implements its own cache policies on top of that, and then set |
| * itself as the default resolver for all later code to use. |
| * |
| * Since: 2.22 |
| */ |
| void |
| g_resolver_set_default (GResolver *resolver) |
| { |
| if (default_resolver) |
| g_object_unref (default_resolver); |
| default_resolver = g_object_ref (resolver); |
| } |
| |
| |
| static void |
| g_resolver_maybe_reload (GResolver *resolver) |
| { |
| #ifdef G_OS_UNIX |
| struct stat st; |
| |
| if (stat (_PATH_RESCONF, &st) == 0) |
| { |
| if (st.st_mtime != resolver->priv->resolv_conf_timestamp) |
| { |
| resolver->priv->resolv_conf_timestamp = st.st_mtime; |
| res_init (); |
| g_signal_emit (resolver, signals[RELOAD], 0); |
| } |
| } |
| #endif |
| } |
| |
| /** |
| * g_resolver_lookup_by_name: |
| * @resolver: a #GResolver |
| * @hostname: the hostname to look up |
| * @cancellable: a #GCancellable, or %NULL |
| * @error: return location for a #GError, or %NULL |
| * |
| * Synchronously resolves @hostname to determine its associated IP |
| * address(es). @hostname may be an ASCII-only or UTF-8 hostname, or |
| * the textual form of an IP address (in which case this just becomes |
| * a wrapper around g_inet_address_new_from_string()). |
| * |
| * On success, g_resolver_lookup_by_name() will return a #GList of |
| * #GInetAddress, sorted in order of preference. (That is, you should |
| * attempt to connect to the first address first, then the second if |
| * the first fails, etc.) |
| * |
| * If the DNS resolution fails, @error (if non-%NULL) will be set to a |
| * value from #GResolverError. |
| * |
| * If @cancellable is non-%NULL, it can be used to cancel the |
| * operation, in which case @error (if non-%NULL) will be set to |
| * %G_IO_ERROR_CANCELLED. |
| * |
| * If you are planning to connect to a socket on the resolved IP |
| * address, it may be easier to create a #GNetworkAddress and use its |
| * #GSocketConnectable interface. |
| * |
| * Return value: a #GList of #GInetAddress, or %NULL on error. You |
| * must unref each of the addresses and free the list when you are |
| * done with it. (You can use g_resolver_free_addresses() to do this.) |
| * |
| * Since: 2.22 |
| */ |
| GList * |
| g_resolver_lookup_by_name (GResolver *resolver, |
| const gchar *hostname, |
| GCancellable *cancellable, |
| GError **error) |
| { |
| GInetAddress *addr; |
| GList *addrs; |
| gchar *ascii_hostname = NULL; |
| |
| g_return_val_if_fail (G_IS_RESOLVER (resolver), NULL); |
| g_return_val_if_fail (hostname != NULL, NULL); |
| |
| /* Check if @hostname is just an IP address */ |
| addr = g_inet_address_new_from_string (hostname); |
| if (addr) |
| return g_list_append (NULL, addr); |
| |
| if (g_hostname_is_non_ascii (hostname)) |
| hostname = ascii_hostname = g_hostname_to_ascii (hostname); |
| |
| g_resolver_maybe_reload (resolver); |
| addrs = G_RESOLVER_GET_CLASS (resolver)-> |
| lookup_by_name (resolver, hostname, cancellable, error); |
| |
| g_free (ascii_hostname); |
| return addrs; |
| } |
| |
| /** |
| * g_resolver_lookup_by_name_async: |
| * @resolver: a #GResolver |
| * @hostname: the hostname to look up the address of |
| * @cancellable: a #GCancellable, or %NULL |
| * @callback: callback to call after resolution completes |
| * @user_data: data for @callback |
| * |
| * Begins asynchronously resolving @hostname to determine its |
| * associated IP address(es), and eventually calls @callback, which |
| * must call g_resolver_lookup_by_name_finish() to get the result. |
| * See g_resolver_lookup_by_name() for more details. |
| * |
| * Since: 2.22 |
| */ |
| void |
| g_resolver_lookup_by_name_async (GResolver *resolver, |
| const gchar *hostname, |
| GCancellable *cancellable, |
| GAsyncReadyCallback callback, |
| gpointer user_data) |
| { |
| GInetAddress *addr; |
| gchar *ascii_hostname = NULL; |
| |
| g_return_if_fail (G_IS_RESOLVER (resolver)); |
| g_return_if_fail (hostname != NULL); |
| |
| /* Check if @hostname is just an IP address */ |
| addr = g_inet_address_new_from_string (hostname); |
| if (addr) |
| { |
| GSimpleAsyncResult *simple; |
| |
| simple = g_simple_async_result_new (G_OBJECT (resolver), |
| callback, user_data, |
| g_resolver_lookup_by_name_async); |
| |
| g_simple_async_result_set_op_res_gpointer (simple, addr, g_object_unref); |
| g_simple_async_result_complete_in_idle (simple); |
| g_object_unref (simple); |
| return; |
| } |
| |
| if (g_hostname_is_non_ascii (hostname)) |
| hostname = ascii_hostname = g_hostname_to_ascii (hostname); |
| |
| g_resolver_maybe_reload (resolver); |
| G_RESOLVER_GET_CLASS (resolver)-> |
| lookup_by_name_async (resolver, hostname, cancellable, callback, user_data); |
| |
| g_free (ascii_hostname); |
| } |
| |
| /** |
| * g_resolver_lookup_by_name_finish: |
| * @resolver: a #GResolver |
| * @result: the result passed to your #GAsyncReadyCallback |
| * @error: return location for a #GError, or %NULL |
| * |
| * Retrieves the result of a call to |
| * g_resolver_lookup_by_name_async(). |
| * |
| * If the DNS resolution failed, @error (if non-%NULL) will be set to |
| * a value from #GResolverError. If the operation was cancelled, |
| * @error will be set to %G_IO_ERROR_CANCELLED. |
| * |
| * Return value: a #GList of #GInetAddress, or %NULL on error. See |
| * g_resolver_lookup_by_name() for more details. |
| * |
| * Since: 2.22 |
| */ |
| GList * |
| g_resolver_lookup_by_name_finish (GResolver *resolver, |
| GAsyncResult *result, |
| GError **error) |
| { |
| g_return_val_if_fail (G_IS_RESOLVER (resolver), NULL); |
| |
| if (G_IS_SIMPLE_ASYNC_RESULT (result)) |
| { |
| GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result); |
| |
| if (g_simple_async_result_propagate_error (simple, error)) |
| return NULL; |
| |
| /* Handle the stringified-IP-addr case */ |
| if (g_simple_async_result_get_source_tag (simple) == g_resolver_lookup_by_name_async) |
| { |
| GInetAddress *addr; |
| |
| addr = g_simple_async_result_get_op_res_gpointer (simple); |
| return g_list_append (NULL, g_object_ref (addr)); |
| } |
| } |
| |
| return G_RESOLVER_GET_CLASS (resolver)-> |
| lookup_by_name_finish (resolver, result, error); |
| } |
| |
| /** |
| * g_resolver_free_addresses: |
| * @addresses: a #GList of #GInetAddress |
| * |
| * Frees @addresses (which should be the return value from |
| * g_resolver_lookup_by_name() or g_resolver_lookup_by_name_finish()). |
| * (This is a convenience method; you can also simply free the results |
| * by hand.) |
| * |
| * Since: 2.22 |
| */ |
| void |
| g_resolver_free_addresses (GList *addresses) |
| { |
| GList *a; |
| |
| for (a = addresses; a; a = a->next) |
| g_object_unref (a->data); |
| g_list_free (addresses); |
| } |
| |
| /** |
| * g_resolver_lookup_by_address: |
| * @resolver: a #GResolver |
| * @address: the address to reverse-resolve |
| * @cancellable: a #GCancellable, or %NULL |
| * @error: return location for a #GError, or %NULL |
| * |
| * Synchronously reverse-resolves @address to determine its |
| * associated hostname. |
| * |
| * If the DNS resolution fails, @error (if non-%NULL) will be set to |
| * a value from #GResolverError. |
| * |
| * If @cancellable is non-%NULL, it can be used to cancel the |
| * operation, in which case @error (if non-%NULL) will be set to |
| * %G_IO_ERROR_CANCELLED. |
| * |
| * Return value: a hostname (either ASCII-only, or in ASCII-encoded |
| * form), or %NULL on error. |
| * |
| * Since: 2.22 |
| */ |
| gchar * |
| g_resolver_lookup_by_address (GResolver *resolver, |
| GInetAddress *address, |
| GCancellable *cancellable, |
| GError **error) |
| { |
| g_return_val_if_fail (G_IS_RESOLVER (resolver), NULL); |
| g_return_val_if_fail (G_IS_INET_ADDRESS (address), NULL); |
| |
| g_resolver_maybe_reload (resolver); |
| return G_RESOLVER_GET_CLASS (resolver)-> |
| lookup_by_address (resolver, address, cancellable, error); |
| } |
| |
| /** |
| * g_resolver_lookup_by_address_async: |
| * @resolver: a #GResolver |
| * @address: the address to reverse-resolve |
| * @cancellable: a #GCancellable, or %NULL |
| * @callback: callback to call after resolution completes |
| * @user_data: data for @callback |
| * |
| * Begins asynchronously reverse-resolving @address to determine its |
| * associated hostname, and eventually calls @callback, which must |
| * call g_resolver_lookup_by_address_finish() to get the final result. |
| * |
| * Since: 2.22 |
| */ |
| void |
| g_resolver_lookup_by_address_async (GResolver *resolver, |
| GInetAddress *address, |
| GCancellable *cancellable, |
| GAsyncReadyCallback callback, |
| gpointer user_data) |
| { |
| g_return_if_fail (G_IS_RESOLVER (resolver)); |
| g_return_if_fail (G_IS_INET_ADDRESS (address)); |
| |
| g_resolver_maybe_reload (resolver); |
| G_RESOLVER_GET_CLASS (resolver)-> |
| lookup_by_address_async (resolver, address, cancellable, callback, user_data); |
| } |
| |
| /** |
| * g_resolver_lookup_by_address_finish: |
| * @resolver: a #GResolver |
| * @result: the result passed to your #GAsyncReadyCallback |
| * @error: return location for a #GError, or %NULL |
| * |
| * Retrieves the result of a previous call to |
| * g_resolver_lookup_by_address_async(). |
| * |
| * If the DNS resolution failed, @error (if non-%NULL) will be set to |
| * a value from #GResolverError. If the operation was cancelled, |
| * @error will be set to %G_IO_ERROR_CANCELLED. |
| * |
| * Return value: a hostname (either ASCII-only, or in ASCII-encoded |
| * form), or %NULL on error. |
| * |
| * Since: 2.22 |
| */ |
| gchar * |
| g_resolver_lookup_by_address_finish (GResolver *resolver, |
| GAsyncResult *result, |
| GError **error) |
| { |
| g_return_val_if_fail (G_IS_RESOLVER (resolver), NULL); |
| |
| if (G_IS_SIMPLE_ASYNC_RESULT (result)) |
| { |
| GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result); |
| |
| if (g_simple_async_result_propagate_error (simple, error)) |
| return NULL; |
| } |
| |
| return G_RESOLVER_GET_CLASS (resolver)-> |
| lookup_by_address_finish (resolver, result, error); |
| } |
| |
| static gchar * |
| g_resolver_get_service_rrname (const char *service, |
| const char *protocol, |
| const char *domain) |
| { |
| gchar *rrname, *ascii_domain = NULL; |
| |
| if (g_hostname_is_non_ascii (domain)) |
| domain = ascii_domain = g_hostname_to_ascii (domain); |
| |
| rrname = g_strdup_printf ("_%s._%s.%s", service, protocol, domain); |
| |
| g_free (ascii_domain); |
| return rrname; |
| } |
| |
| /** |
| * g_resolver_lookup_service: |
| * @resolver: a #GResolver |
| * @service: the service type to look up (eg, "ldap") |
| * @protocol: the networking protocol to use for @service (eg, "tcp") |
| * @domain: the DNS domain to look up the service in |
| * @cancellable: a #GCancellable, or %NULL |
| * @error: return location for a #GError, or %NULL |
| * |
| * Synchronously performs a DNS SRV lookup for the given @service and |
| * @protocol in the given @domain and returns an array of #GSrvTarget. |
| * @domain may be an ASCII-only or UTF-8 hostname. Note also that the |
| * @service and @protocol arguments <emphasis>do not</emphasis> |
| * include the leading underscore that appears in the actual DNS |
| * entry. |
| * |
| * On success, g_resolver_lookup_service() will return a #GList of |
| * #GSrvTarget, sorted in order of preference. (That is, you should |
| * attempt to connect to the first target first, then the second if |
| * the first fails, etc.) |
| * |
| * If the DNS resolution fails, @error (if non-%NULL) will be set to |
| * a value from #GResolverError. |
| * |
| * If @cancellable is non-%NULL, it can be used to cancel the |
| * operation, in which case @error (if non-%NULL) will be set to |
| * %G_IO_ERROR_CANCELLED. |
| * |
| * If you are planning to connect to the service, it is usually easier |
| * to create a #GNetworkService and use its #GSocketConnectable |
| * interface. |
| * |
| * Return value: a #GList of #GSrvTarget, or %NULL on error. You must |
| * free each of the targets and the list when you are done with it. |
| * (You can use g_resolver_free_targets() to do this.) |
| * |
| * Since: 2.22 |
| */ |
| GList * |
| g_resolver_lookup_service (GResolver *resolver, |
| const gchar *service, |
| const gchar *protocol, |
| const gchar *domain, |
| GCancellable *cancellable, |
| GError **error) |
| { |
| GList *targets; |
| gchar *rrname; |
| |
| g_return_val_if_fail (G_IS_RESOLVER (resolver), NULL); |
| g_return_val_if_fail (service != NULL, NULL); |
| g_return_val_if_fail (protocol != NULL, NULL); |
| g_return_val_if_fail (domain != NULL, NULL); |
| |
| rrname = g_resolver_get_service_rrname (service, protocol, domain); |
| |
| g_resolver_maybe_reload (resolver); |
| targets = G_RESOLVER_GET_CLASS (resolver)-> |
| lookup_service (resolver, rrname, cancellable, error); |
| |
| g_free (rrname); |
| return targets; |
| } |
| |
| /** |
| * g_resolver_lookup_service_async: |
| * @resolver: a #GResolver |
| * @service: the service type to look up (eg, "ldap") |
| * @protocol: the networking protocol to use for @service (eg, "tcp") |
| * @domain: the DNS domain to look up the service in |
| * @cancellable: a #GCancellable, or %NULL |
| * @callback: callback to call after resolution completes |
| * @user_data: data for @callback |
| * |
| * Begins asynchronously performing a DNS SRV lookup for the given |
| * @service and @protocol in the given @domain, and eventually calls |
| * @callback, which must call g_resolver_lookup_service_finish() to |
| * get the final result. See g_resolver_lookup_service() for more |
| * details. |
| * |
| * Since: 2.22 |
| */ |
| void |
| g_resolver_lookup_service_async (GResolver *resolver, |
| const gchar *service, |
| const gchar *protocol, |
| const gchar *domain, |
| GCancellable *cancellable, |
| GAsyncReadyCallback callback, |
| gpointer user_data) |
| { |
| gchar *rrname; |
| |
| g_return_if_fail (G_IS_RESOLVER (resolver)); |
| g_return_if_fail (service != NULL); |
| g_return_if_fail (protocol != NULL); |
| g_return_if_fail (domain != NULL); |
| |
| rrname = g_resolver_get_service_rrname (service, protocol, domain); |
| |
| g_resolver_maybe_reload (resolver); |
| G_RESOLVER_GET_CLASS (resolver)-> |
| lookup_service_async (resolver, rrname, cancellable, callback, user_data); |
| |
| g_free (rrname); |
| } |
| |
| /** |
| * g_resolver_lookup_service_finish: |
| * @resolver: a #GResolver |
| * @result: the result passed to your #GAsyncReadyCallback |
| * @error: return location for a #GError, or %NULL |
| * |
| * Retrieves the result of a previous call to |
| * g_resolver_lookup_service_async(). |
| * |
| * If the DNS resolution failed, @error (if non-%NULL) will be set to |
| * a value from #GResolverError. If the operation was cancelled, |
| * @error will be set to %G_IO_ERROR_CANCELLED. |
| * |
| * Return value: a #GList of #GSrvTarget, or %NULL on error. See |
| * g_resolver_lookup_service() for more details. |
| * |
| * Since: 2.22 |
| */ |
| GList * |
| g_resolver_lookup_service_finish (GResolver *resolver, |
| GAsyncResult *result, |
| GError **error) |
| { |
| g_return_val_if_fail (G_IS_RESOLVER (resolver), NULL); |
| |
| if (G_IS_SIMPLE_ASYNC_RESULT (result)) |
| { |
| GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result); |
| |
| if (g_simple_async_result_propagate_error (simple, error)) |
| return NULL; |
| } |
| |
| return G_RESOLVER_GET_CLASS (resolver)-> |
| lookup_service_finish (resolver, result, error); |
| } |
| |
| /** |
| * g_resolver_free_targets: |
| * @targets: a #GList of #GSrvTarget |
| * |
| * Frees @targets (which should be the return value from |
| * g_resolver_lookup_service() or g_resolver_lookup_service_finish()). |
| * (This is a convenience method; you can also simply free the |
| * results by hand.) |
| * |
| * Since: 2.22 |
| */ |
| void |
| g_resolver_free_targets (GList *targets) |
| { |
| GList *t; |
| |
| for (t = targets; t; t = t->next) |
| g_srv_target_free (t->data); |
| g_list_free (targets); |
| } |
| |
| /** |
| * g_resolver_error_quark: |
| * |
| * Gets the #GResolver Error Quark. |
| * |
| * Return value: a #GQuark. |
| * |
| * Since: 2.22 |
| */ |
| GQuark |
| g_resolver_error_quark (void) |
| { |
| return g_quark_from_static_string ("g-resolver-error-quark"); |
| } |
| |
| |
| static GResolverError |
| g_resolver_error_from_addrinfo_error (gint err) |
| { |
| switch (err) |
| { |
| case EAI_FAIL: |
| #if defined(EAI_NODATA) && (EAI_NODATA != EAI_NONAME) |
| case EAI_NODATA: |
| #endif |
| case EAI_NONAME: |
| return G_RESOLVER_ERROR_NOT_FOUND; |
| |
| case EAI_AGAIN: |
| return G_RESOLVER_ERROR_TEMPORARY_FAILURE; |
| |
| default: |
| return G_RESOLVER_ERROR_INTERNAL; |
| } |
| } |
| |
| struct addrinfo _g_resolver_addrinfo_hints; |
| |
| /* Private method to process a getaddrinfo() response. */ |
| GList * |
| _g_resolver_addresses_from_addrinfo (const char *hostname, |
| struct addrinfo *res, |
| gint gai_retval, |
| GError **error) |
| { |
| struct addrinfo *ai; |
| GSocketAddress *sockaddr; |
| GInetAddress *addr; |
| GList *addrs; |
| |
| if (gai_retval != 0) |
| { |
| g_set_error (error, G_RESOLVER_ERROR, |
| g_resolver_error_from_addrinfo_error (gai_retval), |
| _("Error resolving '%s': %s"), |
| hostname, gai_strerror (gai_retval)); |
| return NULL; |
| } |
| |
| g_return_val_if_fail (res != NULL, NULL); |
| |
| addrs = NULL; |
| for (ai = res; ai; ai = ai->ai_next) |
| { |
| sockaddr = g_socket_address_new_from_native (ai->ai_addr, ai->ai_addrlen); |
| if (!sockaddr || !G_IS_INET_SOCKET_ADDRESS (sockaddr)) |
| continue; |
| |
| addr = g_object_ref (g_inet_socket_address_get_address ((GInetSocketAddress *)sockaddr)); |
| addrs = g_list_prepend (addrs, addr); |
| g_object_unref (sockaddr); |
| } |
| |
| return g_list_reverse (addrs); |
| } |
| |
| /* Private method to set up a getnameinfo() request */ |
| void |
| _g_resolver_address_to_sockaddr (GInetAddress *address, |
| struct sockaddr_storage *sa, |
| gsize *len) |
| { |
| GSocketAddress *sockaddr; |
| |
| sockaddr = g_inet_socket_address_new (address, 0); |
| g_socket_address_to_native (sockaddr, (struct sockaddr *)sa, sizeof (*sa), NULL); |
| *len = g_socket_address_get_native_size (sockaddr); |
| g_object_unref (sockaddr); |
| } |
| |
| /* Private method to process a getnameinfo() response. */ |
| char * |
| _g_resolver_name_from_nameinfo (GInetAddress *address, |
| const gchar *name, |
| gint gni_retval, |
| GError **error) |
| { |
| if (gni_retval != 0) |
| { |
| gchar *phys; |
| |
| phys = g_inet_address_to_string (address); |
| g_set_error (error, G_RESOLVER_ERROR, |
| g_resolver_error_from_addrinfo_error (gni_retval), |
| _("Error reverse-resolving '%s': %s"), |
| phys ? phys : "(unknown)", gai_strerror (gni_retval)); |
| g_free (phys); |
| return NULL; |
| } |
| |
| return g_strdup (name); |
| } |
| |
| #if defined(G_OS_UNIX) |
| /* Private method to process a res_query response into GSrvTargets */ |
| GList * |
| _g_resolver_targets_from_res_query (const gchar *rrname, |
| guchar *answer, |
| gint len, |
| gint herr, |
| GError **error) |
| { |
| gint count; |
| gchar namebuf[1024]; |
| guchar *end, *p; |
| guint16 type, qclass, rdlength, priority, weight, port; |
| guint32 ttl; |
| HEADER *header; |
| GSrvTarget *target; |
| GList *targets; |
| |
| if (len <= 0) |
| { |
| GResolverError errnum; |
| const gchar *format; |
| |
| if (len == 0 || herr == HOST_NOT_FOUND || herr == NO_DATA) |
| { |
| errnum = G_RESOLVER_ERROR_NOT_FOUND; |
| format = _("No service record for '%s'"); |
| } |
| else if (herr == TRY_AGAIN) |
| { |
| errnum = G_RESOLVER_ERROR_TEMPORARY_FAILURE; |
| format = _("Temporarily unable to resolve '%s'"); |
| } |
| else |
| { |
| errnum = G_RESOLVER_ERROR_INTERNAL; |
| format = _("Error resolving '%s'"); |
| } |
| |
| g_set_error (error, G_RESOLVER_ERROR, errnum, format, rrname); |
| return NULL; |
| } |
| |
| targets = NULL; |
| |
| header = (HEADER *)answer; |
| p = answer + sizeof (HEADER); |
| end = answer + len; |
| |
| /* Skip query */ |
| count = ntohs (header->qdcount); |
| while (count-- && p < end) |
| { |
| p += dn_expand (answer, end, p, namebuf, sizeof (namebuf)); |
| p += 4; |
| } |
| |
| /* Read answers */ |
| count = ntohs (header->ancount); |
| while (count-- && p < end) |
| { |
| p += dn_expand (answer, end, p, namebuf, sizeof (namebuf)); |
| GETSHORT (type, p); |
| GETSHORT (qclass, p); |
| GETLONG (ttl, p); |
| GETSHORT (rdlength, p); |
| |
| if (type != T_SRV || qclass != C_IN) |
| { |
| p += rdlength; |
| continue; |
| } |
| |
| GETSHORT (priority, p); |
| GETSHORT (weight, p); |
| GETSHORT (port, p); |
| p += dn_expand (answer, end, p, namebuf, sizeof (namebuf)); |
| |
| target = g_srv_target_new (namebuf, port, priority, weight); |
| targets = g_list_prepend (targets, target); |
| } |
| |
| return g_srv_target_list_sort (targets); |
| } |
| #elif defined(G_OS_WIN32) |
| /* Private method to process a DnsQuery response into GSrvTargets */ |
| GList * |
| _g_resolver_targets_from_DnsQuery (const gchar *rrname, |
| DNS_STATUS status, |
| DNS_RECORD *results, |
| GError **error) |
| { |
| DNS_RECORD *rec; |
| GSrvTarget *target; |
| GList *targets; |
| |
| if (status != ERROR_SUCCESS) |
| { |
| GResolverError errnum; |
| const gchar *format; |
| |
| if (status == DNS_ERROR_RCODE_NAME_ERROR) |
| { |
| errnum = G_RESOLVER_ERROR_NOT_FOUND; |
| format = _("No service record for '%s'"); |
| } |
| else if (status == DNS_ERROR_RCODE_SERVER_FAILURE) |
| { |
| errnum = G_RESOLVER_ERROR_TEMPORARY_FAILURE; |
| format = _("Temporarily unable to resolve '%s'"); |
| } |
| else |
| { |
| errnum = G_RESOLVER_ERROR_INTERNAL; |
| format = _("Error resolving '%s'"); |
| } |
| |
| g_set_error (error, G_RESOLVER_ERROR, errnum, format, rrname); |
| return NULL; |
| } |
| |
| targets = NULL; |
| for (rec = results; rec; rec = rec->pNext) |
| { |
| if (rec->wType != DNS_TYPE_SRV) |
| continue; |
| |
| target = g_srv_target_new (rec->Data.SRV.pNameTarget, |
| rec->Data.SRV.wPort, |
| rec->Data.SRV.wPriority, |
| rec->Data.SRV.wWeight); |
| targets = g_list_prepend (targets, target); |
| } |
| |
| return g_srv_target_list_sort (targets); |
| } |
| |
| #endif |
| |
| #define __G_RESOLVER_C__ |
| #include "gioaliasdef.c" |
