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glib/gio/gdtlsconnection.c
Christian Hergert 22ba4411cc gio: remove use of generic marshaller from GIO objects 
Using the generic marshaller has drawbacks beyond performance. One such
drawback is that it breaks the stack unwinding from the Linux kernel due
to having unsufficient data to walk past ffi_call_unixt64. That means that
performance profiling by application developers looks grouped among
seemingly unrelated code paths.

While we can't fix the kernel unwinding here, we can provide proper
c_marshallers and va_marshallers for objects within Gio so that
performance profiling of applications is more reliable.

Related to GNOME/Initiatives#10
2019-06-17 16:29:09 -07:00

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/* GIO - GLib Input, Output and Streaming Library
*
* Copyright © 2010 Red Hat, Inc
* Copyright © 2015 Collabora, Ltd.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "glib.h"
#include "gdtlsconnection.h"
#include "gcancellable.h"
#include "gioenumtypes.h"
#include "gsocket.h"
#include "gtlsbackend.h"
#include "gtlscertificate.h"
#include "gdtlsclientconnection.h"
#include "gtlsdatabase.h"
#include "gtlsinteraction.h"
#include "glibintl.h"
#include "gmarshal-internal.h"
/**
* SECTION:gdtlsconnection
* @short_description: DTLS connection type
* @include: gio/gio.h
*
* #GDtlsConnection is the base DTLS connection class type, which wraps
* a #GDatagramBased and provides DTLS encryption on top of it. Its
* subclasses, #GDtlsClientConnection and #GDtlsServerConnection,
* implement client-side and server-side DTLS, respectively.
*
* For TLS support, see #GTlsConnection.
*
* As DTLS is datagram based, #GDtlsConnection implements #GDatagramBased,
* presenting a datagram-socket-like API for the encrypted connection. This
* operates over a base datagram connection, which is also a #GDatagramBased
* (#GDtlsConnection:base-socket).
*
* To close a DTLS connection, use g_dtls_connection_close().
*
* Neither #GDtlsServerConnection or #GDtlsClientConnection set the peer address
* on their base #GDatagramBased if it is a #GSocket — it is up to the caller to
* do that if they wish. If they do not, and g_socket_close() is called on the
* base socket, the #GDtlsConnection will not raise a %G_IO_ERROR_NOT_CONNECTED
* error on further I/O.
*
* Since: 2.48
*/
/**
* GDtlsConnection:
*
* Abstract base class for the backend-specific #GDtlsClientConnection
* and #GDtlsServerConnection types.
*
* Since: 2.48
*/
G_DEFINE_INTERFACE (GDtlsConnection, g_dtls_connection, G_TYPE_DATAGRAM_BASED)
enum {
ACCEPT_CERTIFICATE,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
enum {
PROP_BASE_SOCKET = 1,
PROP_REQUIRE_CLOSE_NOTIFY,
PROP_REHANDSHAKE_MODE,
PROP_DATABASE,
PROP_INTERACTION,
PROP_CERTIFICATE,
PROP_PEER_CERTIFICATE,
PROP_PEER_CERTIFICATE_ERRORS,
};
static void
g_dtls_connection_default_init (GDtlsConnectionInterface *iface)
{
/**
* GDtlsConnection:base-socket:
*
* The #GDatagramBased that the connection wraps. Note that this may be any
* implementation of #GDatagramBased, not just a #GSocket.
*
* Since: 2.48
*/
g_object_interface_install_property (iface,
g_param_spec_object ("base-socket",
P_("Base Socket"),
P_("The GDatagramBased that the connection wraps"),
G_TYPE_DATAGRAM_BASED,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
/**
* GDtlsConnection:database:
*
* The certificate database to use when verifying this TLS connection.
* If no certificate database is set, then the default database will be
* used. See g_tls_backend_get_default_database().
*
* Since: 2.48
*/
g_object_interface_install_property (iface,
g_param_spec_object ("database",
P_("Database"),
P_("Certificate database to use for looking up or verifying certificates"),
G_TYPE_TLS_DATABASE,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
/**
* GDtlsConnection:interaction:
*
* A #GTlsInteraction object to be used when the connection or certificate
* database need to interact with the user. This will be used to prompt the
* user for passwords where necessary.
*
* Since: 2.48
*/
g_object_interface_install_property (iface,
g_param_spec_object ("interaction",
P_("Interaction"),
P_("Optional object for user interaction"),
G_TYPE_TLS_INTERACTION,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
/**
* GDtlsConnection:require-close-notify:
*
* Whether or not proper TLS close notification is required.
* See g_dtls_connection_set_require_close_notify().
*
* Since: 2.48
*/
g_object_interface_install_property (iface,
g_param_spec_boolean ("require-close-notify",
P_("Require close notify"),
P_("Whether to require proper TLS close notification"),
TRUE,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_STRINGS));
/**
* GDtlsConnection:rehandshake-mode:
*
* The rehandshaking mode. See
* g_dtls_connection_set_rehandshake_mode().
*
* Since: 2.48
*
* Deprecated: 2.60. Changing the rehandshake mode is no longer
* required for compatibility. Also, rehandshaking has been removed
* from the TLS protocol in TLS 1.3.
*/
g_object_interface_install_property (iface,
g_param_spec_enum ("rehandshake-mode",
P_("Rehandshake mode"),
P_("When to allow rehandshaking"),
G_TYPE_TLS_REHANDSHAKE_MODE,
G_TLS_REHANDSHAKE_NEVER,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_STRINGS |
G_PARAM_DEPRECATED));
/**
* GDtlsConnection:certificate:
*
* The connection's certificate; see
* g_dtls_connection_set_certificate().
*
* Since: 2.48
*/
g_object_interface_install_property (iface,
g_param_spec_object ("certificate",
P_("Certificate"),
P_("The connection’s certificate"),
G_TYPE_TLS_CERTIFICATE,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
/**
* GDtlsConnection:peer-certificate:
*
* The connection's peer's certificate, after the TLS handshake has
* completed and the certificate has been accepted. Note in
* particular that this is not yet set during the emission of
* #GDtlsConnection::accept-certificate.
*
* (You can watch for a #GObject::notify signal on this property to
* detect when a handshake has occurred.)
*
* Since: 2.48
*/
g_object_interface_install_property (iface,
g_param_spec_object ("peer-certificate",
P_("Peer Certificate"),
P_("The connection’s peer’s certificate"),
G_TYPE_TLS_CERTIFICATE,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS));
/**
* GDtlsConnection:peer-certificate-errors:
*
* The errors noticed-and-ignored while verifying
* #GDtlsConnection:peer-certificate. Normally this should be 0, but
* it may not be if #GDtlsClientConnection:validation-flags is not
* %G_TLS_CERTIFICATE_VALIDATE_ALL, or if
* #GDtlsConnection::accept-certificate overrode the default
* behavior.
*
* Since: 2.48
*/
g_object_interface_install_property (iface,
g_param_spec_flags ("peer-certificate-errors",
P_("Peer Certificate Errors"),
P_("Errors found with the peer’s certificate"),
G_TYPE_TLS_CERTIFICATE_FLAGS,
0,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS));
/**
* GDtlsConnection:advertised-protocols:
*
* The list of application-layer protocols that the connection
* advertises that it is willing to speak. See
* g_dtls_connection_set_advertised_protocols().
*
* Since: 2.60
*/
g_object_interface_install_property (iface,
g_param_spec_boxed ("advertised-protocols",
P_("Advertised Protocols"),
P_("Application-layer protocols available on this connection"),
G_TYPE_STRV,
G_PARAM_READWRITE |
G_PARAM_STATIC_STRINGS));
/**
* GDtlsConnection:negotiated-protocol:
*
* The application-layer protocol negotiated during the TLS
* handshake. See g_dtls_connection_get_negotiated_protocol().
*
* Since: 2.60
*/
g_object_interface_install_property (iface,
g_param_spec_string ("negotiated-protocol",
P_("Negotiated Protocol"),
P_("Application-layer protocol negotiated for this connection"),
NULL,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS));
/**
* GDtlsConnection::accept-certificate:
* @conn: a #GDtlsConnection
* @peer_cert: the peer's #GTlsCertificate
* @errors: the problems with @peer_cert.
*
* Emitted during the TLS handshake after the peer certificate has
* been received. You can examine @peer_cert's certification path by
* calling g_tls_certificate_get_issuer() on it.
*
* For a client-side connection, @peer_cert is the server's
* certificate, and the signal will only be emitted if the
* certificate was not acceptable according to @conn's
* #GDtlsClientConnection:validation_flags. If you would like the
* certificate to be accepted despite @errors, return %TRUE from the
* signal handler. Otherwise, if no handler accepts the certificate,
* the handshake will fail with %G_TLS_ERROR_BAD_CERTIFICATE.
*
* For a server-side connection, @peer_cert is the certificate
* presented by the client, if this was requested via the server's
* #GDtlsServerConnection:authentication_mode. On the server side,
* the signal is always emitted when the client presents a
* certificate, and the certificate will only be accepted if a
* handler returns %TRUE.
*
* Note that if this signal is emitted as part of asynchronous I/O
* in the main thread, then you should not attempt to interact with
* the user before returning from the signal handler. If you want to
* let the user decide whether or not to accept the certificate, you
* would have to return %FALSE from the signal handler on the first
* attempt, and then after the connection attempt returns a
* %G_TLS_ERROR_BAD_CERTIFICATE, you can interact with the user, and
* if the user decides to accept the certificate, remember that fact,
* create a new connection, and return %TRUE from the signal handler
* the next time.
*
* If you are doing I/O in another thread, you do not
* need to worry about this, and can simply block in the signal
* handler until the UI thread returns an answer.
*
* Returns: %TRUE to accept @peer_cert (which will also
* immediately end the signal emission). %FALSE to allow the signal
* emission to continue, which will cause the handshake to fail if
* no one else overrides it.
*
* Since: 2.48
*/
signals[ACCEPT_CERTIFICATE] =
g_signal_new (I_("accept-certificate"),
G_TYPE_DTLS_CONNECTION,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GDtlsConnectionInterface, accept_certificate),
g_signal_accumulator_true_handled, NULL,
_g_cclosure_marshal_BOOLEAN__OBJECT_FLAGS,
G_TYPE_BOOLEAN, 2,
G_TYPE_TLS_CERTIFICATE,
G_TYPE_TLS_CERTIFICATE_FLAGS);
g_signal_set_va_marshaller (signals[ACCEPT_CERTIFICATE],
G_TYPE_FROM_INTERFACE (iface),
_g_cclosure_marshal_BOOLEAN__OBJECT_FLAGSv);
}
/**
* g_dtls_connection_set_database:
* @conn: a #GDtlsConnection
* @database: a #GTlsDatabase
*
* Sets the certificate database that is used to verify peer certificates.
* This is set to the default database by default. See
* g_tls_backend_get_default_database(). If set to %NULL, then
* peer certificate validation will always set the
* %G_TLS_CERTIFICATE_UNKNOWN_CA error (meaning
* #GDtlsConnection::accept-certificate will always be emitted on
* client-side connections, unless that bit is not set in
* #GDtlsClientConnection:validation-flags).
*
* Since: 2.48
*/
void
g_dtls_connection_set_database (GDtlsConnection *conn,
GTlsDatabase *database)
{
g_return_if_fail (G_IS_DTLS_CONNECTION (conn));
g_return_if_fail (database == NULL || G_IS_TLS_DATABASE (database));
g_object_set (G_OBJECT (conn),
"database", database,
NULL);
}
/**
* g_dtls_connection_get_database:
* @conn: a #GDtlsConnection
*
* Gets the certificate database that @conn uses to verify
* peer certificates. See g_dtls_connection_set_database().
*
* Returns: (transfer none): the certificate database that @conn uses or %NULL
*
* Since: 2.48
*/
GTlsDatabase*
g_dtls_connection_get_database (GDtlsConnection *conn)
{
GTlsDatabase *database = NULL;
g_return_val_if_fail (G_IS_DTLS_CONNECTION (conn), NULL);
g_object_get (G_OBJECT (conn),
"database", &database,
NULL);
if (database)
g_object_unref (database);
return database;
}
/**
* g_dtls_connection_set_certificate:
* @conn: a #GDtlsConnection
* @certificate: the certificate to use for @conn
*
* This sets the certificate that @conn will present to its peer
* during the TLS handshake. For a #GDtlsServerConnection, it is
* mandatory to set this, and that will normally be done at construct
* time.
*
* For a #GDtlsClientConnection, this is optional. If a handshake fails
* with %G_TLS_ERROR_CERTIFICATE_REQUIRED, that means that the server
* requires a certificate, and if you try connecting again, you should
* call this method first. You can call
* g_dtls_client_connection_get_accepted_cas() on the failed connection
* to get a list of Certificate Authorities that the server will
* accept certificates from.
*
* (It is also possible that a server will allow the connection with
* or without a certificate; in that case, if you don't provide a
* certificate, you can tell that the server requested one by the fact
* that g_dtls_client_connection_get_accepted_cas() will return
* non-%NULL.)
*
* Since: 2.48
*/
void
g_dtls_connection_set_certificate (GDtlsConnection *conn,
GTlsCertificate *certificate)
{
g_return_if_fail (G_IS_DTLS_CONNECTION (conn));
g_return_if_fail (G_IS_TLS_CERTIFICATE (certificate));
g_object_set (G_OBJECT (conn), "certificate", certificate, NULL);
}
/**
* g_dtls_connection_get_certificate:
* @conn: a #GDtlsConnection
*
* Gets @conn's certificate, as set by
* g_dtls_connection_set_certificate().
*
* Returns: (transfer none): @conn's certificate, or %NULL
*
* Since: 2.48
*/
GTlsCertificate *
g_dtls_connection_get_certificate (GDtlsConnection *conn)
{
GTlsCertificate *certificate;
g_return_val_if_fail (G_IS_DTLS_CONNECTION (conn), NULL);
g_object_get (G_OBJECT (conn), "certificate", &certificate, NULL);
if (certificate)
g_object_unref (certificate);
return certificate;
}
/**
* g_dtls_connection_set_interaction:
* @conn: a connection
* @interaction: (nullable): an interaction object, or %NULL
*
* Set the object that will be used to interact with the user. It will be used
* for things like prompting the user for passwords.
*
* The @interaction argument will normally be a derived subclass of
* #GTlsInteraction. %NULL can also be provided if no user interaction
* should occur for this connection.
*
* Since: 2.48
*/
void
g_dtls_connection_set_interaction (GDtlsConnection *conn,
GTlsInteraction *interaction)
{
g_return_if_fail (G_IS_DTLS_CONNECTION (conn));
g_return_if_fail (interaction == NULL || G_IS_TLS_INTERACTION (interaction));
g_object_set (G_OBJECT (conn), "interaction", interaction, NULL);
}
/**
* g_dtls_connection_get_interaction:
* @conn: a connection
*
* Get the object that will be used to interact with the user. It will be used
* for things like prompting the user for passwords. If %NULL is returned, then
* no user interaction will occur for this connection.
*
* Returns: (transfer none): The interaction object.
*
* Since: 2.48
*/
GTlsInteraction *
g_dtls_connection_get_interaction (GDtlsConnection *conn)
{
GTlsInteraction *interaction = NULL;
g_return_val_if_fail (G_IS_DTLS_CONNECTION (conn), NULL);
g_object_get (G_OBJECT (conn), "interaction", &interaction, NULL);
if (interaction)
g_object_unref (interaction);
return interaction;
}
/**
* g_dtls_connection_get_peer_certificate:
* @conn: a #GDtlsConnection
*
* Gets @conn's peer's certificate after the handshake has completed.
* (It is not set during the emission of
* #GDtlsConnection::accept-certificate.)
*
* Returns: (transfer none): @conn's peer's certificate, or %NULL
*
* Since: 2.48
*/
GTlsCertificate *
g_dtls_connection_get_peer_certificate (GDtlsConnection *conn)
{
GTlsCertificate *peer_certificate;
g_return_val_if_fail (G_IS_DTLS_CONNECTION (conn), NULL);
g_object_get (G_OBJECT (conn), "peer-certificate", &peer_certificate, NULL);
if (peer_certificate)
g_object_unref (peer_certificate);
return peer_certificate;
}
/**
* g_dtls_connection_get_peer_certificate_errors:
* @conn: a #GDtlsConnection
*
* Gets the errors associated with validating @conn's peer's
* certificate, after the handshake has completed. (It is not set
* during the emission of #GDtlsConnection::accept-certificate.)
*
* Returns: @conn's peer's certificate errors
*
* Since: 2.48
*/
GTlsCertificateFlags
g_dtls_connection_get_peer_certificate_errors (GDtlsConnection *conn)
{
GTlsCertificateFlags errors;
g_return_val_if_fail (G_IS_DTLS_CONNECTION (conn), 0);
g_object_get (G_OBJECT (conn), "peer-certificate-errors", &errors, NULL);
return errors;
}
/**
* g_dtls_connection_set_require_close_notify:
* @conn: a #GDtlsConnection
* @require_close_notify: whether or not to require close notification
*
* Sets whether or not @conn expects a proper TLS close notification
* before the connection is closed. If this is %TRUE (the default),
* then @conn will expect to receive a TLS close notification from its
* peer before the connection is closed, and will return a
* %G_TLS_ERROR_EOF error if the connection is closed without proper
* notification (since this may indicate a network error, or
* man-in-the-middle attack).
*
* In some protocols, the application will know whether or not the
* connection was closed cleanly based on application-level data
* (because the application-level data includes a length field, or is
* somehow self-delimiting); in this case, the close notify is
* redundant and may be omitted. You
* can use g_dtls_connection_set_require_close_notify() to tell @conn
* to allow an "unannounced" connection close, in which case the close
* will show up as a 0-length read, as in a non-TLS
* #GDatagramBased, and it is up to the application to check that
* the data has been fully received.
*
* Note that this only affects the behavior when the peer closes the
* connection; when the application calls g_dtls_connection_close_async() on
* @conn itself, this will send a close notification regardless of the
* setting of this property. If you explicitly want to do an unclean
* close, you can close @conn's #GDtlsConnection:base-socket rather
* than closing @conn itself.
*
* Since: 2.48
*/
void
g_dtls_connection_set_require_close_notify (GDtlsConnection *conn,
gboolean require_close_notify)
{
g_return_if_fail (G_IS_DTLS_CONNECTION (conn));
g_object_set (G_OBJECT (conn),
"require-close-notify", require_close_notify,
NULL);
}
/**
* g_dtls_connection_get_require_close_notify:
* @conn: a #GDtlsConnection
*
* Tests whether or not @conn expects a proper TLS close notification
* when the connection is closed. See
* g_dtls_connection_set_require_close_notify() for details.
*
* Returns: %TRUE if @conn requires a proper TLS close notification.
*
* Since: 2.48
*/
gboolean
g_dtls_connection_get_require_close_notify (GDtlsConnection *conn)
{
gboolean require_close_notify;
g_return_val_if_fail (G_IS_DTLS_CONNECTION (conn), TRUE);
g_object_get (G_OBJECT (conn),
"require-close-notify", &require_close_notify,
NULL);
return require_close_notify;
}
/**
* g_dtls_connection_set_rehandshake_mode:
* @conn: a #GDtlsConnection
* @mode: the rehandshaking mode
*
* Sets how @conn behaves with respect to rehandshaking requests.
*
* %G_TLS_REHANDSHAKE_NEVER means that it will never agree to
* rehandshake after the initial handshake is complete. (For a client,
* this means it will refuse rehandshake requests from the server, and
* for a server, this means it will close the connection with an error
* if the client attempts to rehandshake.)
*
* %G_TLS_REHANDSHAKE_SAFELY means that the connection will allow a
* rehandshake only if the other end of the connection supports the
* TLS `renegotiation_info` extension. This is the default behavior,
* but means that rehandshaking will not work against older
* implementations that do not support that extension.
*
* %G_TLS_REHANDSHAKE_UNSAFELY means that the connection will allow
* rehandshaking even without the `renegotiation_info` extension. On
* the server side in particular, this is not recommended, since it
* leaves the server open to certain attacks. However, this mode is
* necessary if you need to allow renegotiation with older client
* software.
*
* Since: 2.48
*
* Deprecated: 2.60. Changing the rehandshake mode is no longer
* required for compatibility. Also, rehandshaking has been removed
* from the TLS protocol in TLS 1.3.
*/
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
void
g_dtls_connection_set_rehandshake_mode (GDtlsConnection *conn,
GTlsRehandshakeMode mode)
{
g_return_if_fail (G_IS_DTLS_CONNECTION (conn));
g_object_set (G_OBJECT (conn),
"rehandshake-mode", mode,
NULL);
}
G_GNUC_END_IGNORE_DEPRECATIONS
/**
* g_dtls_connection_get_rehandshake_mode:
* @conn: a #GDtlsConnection
*
* Gets @conn rehandshaking mode. See
* g_dtls_connection_set_rehandshake_mode() for details.
*
* Returns: @conn's rehandshaking mode
*
* Since: 2.48
*/
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
GTlsRehandshakeMode
g_dtls_connection_get_rehandshake_mode (GDtlsConnection *conn)
{
GTlsRehandshakeMode mode;
g_return_val_if_fail (G_IS_DTLS_CONNECTION (conn), G_TLS_REHANDSHAKE_NEVER);
g_object_get (G_OBJECT (conn),
"rehandshake-mode", &mode,
NULL);
return mode;
}
G_GNUC_END_IGNORE_DEPRECATIONS
/**
* g_dtls_connection_handshake:
* @conn: a #GDtlsConnection
* @cancellable: (nullable): a #GCancellable, or %NULL
* @error: a #GError, or %NULL
*
* Attempts a TLS handshake on @conn.
*
* On the client side, it is never necessary to call this method;
* although the connection needs to perform a handshake after
* connecting (or after sending a "STARTTLS"-type command) and may
* need to rehandshake later if the server requests it,
* #GDtlsConnection will handle this for you automatically when you try
* to send or receive data on the connection. However, you can call
* g_dtls_connection_handshake() manually if you want to know for sure
* whether the initial handshake succeeded or failed (as opposed to
* just immediately trying to write to @conn, in which
* case if it fails, it may not be possible to tell if it failed
* before or after completing the handshake).
*
* Likewise, on the server side, although a handshake is necessary at
* the beginning of the communication, you do not need to call this
* function explicitly unless you want clearer error reporting.
*
* If TLS 1.2 or older is in use, you may call
* g_dtls_connection_handshake() after the initial handshake to
* rehandshake; however, this usage is deprecated because rehandshaking
* is no longer part of the TLS protocol in TLS 1.3. Accordingly, the
* behavior of calling this function after the initial handshake is now
* undefined, except it is guaranteed to be reasonable and
* nondestructive so as to preserve compatibility with code written for
* older versions of GLib.
*
* #GDtlsConnection::accept_certificate may be emitted during the
* handshake.
*
* Returns: success or failure
*
* Since: 2.48
*/
gboolean
g_dtls_connection_handshake (GDtlsConnection *conn,
GCancellable *cancellable,
GError **error)
{
g_return_val_if_fail (G_IS_DTLS_CONNECTION (conn), FALSE);
return G_DTLS_CONNECTION_GET_INTERFACE (conn)->handshake (conn, cancellable,
error);
}
/**
* g_dtls_connection_handshake_async:
* @conn: a #GDtlsConnection
* @io_priority: the [I/O priority][io-priority] of the request
* @cancellable: (nullable): a #GCancellable, or %NULL
* @callback: callback to call when the handshake is complete
* @user_data: the data to pass to the callback function
*
* Asynchronously performs a TLS handshake on @conn. See
* g_dtls_connection_handshake() for more information.
*
* Since: 2.48
*/
void
g_dtls_connection_handshake_async (GDtlsConnection *conn,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_return_if_fail (G_IS_DTLS_CONNECTION (conn));
G_DTLS_CONNECTION_GET_INTERFACE (conn)->handshake_async (conn, io_priority,
cancellable,
callback, user_data);
}
/**
* g_dtls_connection_handshake_finish:
* @conn: a #GDtlsConnection
* @result: a #GAsyncResult.
* @error: a #GError pointer, or %NULL
*
* Finish an asynchronous TLS handshake operation. See
* g_dtls_connection_handshake() for more information.
*
* Returns: %TRUE on success, %FALSE on failure, in which
* case @error will be set.
*
* Since: 2.48
*/
gboolean
g_dtls_connection_handshake_finish (GDtlsConnection *conn,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (G_IS_DTLS_CONNECTION (conn), FALSE);
return G_DTLS_CONNECTION_GET_INTERFACE (conn)->handshake_finish (conn,
result,
error);
}
/**
* g_dtls_connection_shutdown:
* @conn: a #GDtlsConnection
* @shutdown_read: %TRUE to stop reception of incoming datagrams
* @shutdown_write: %TRUE to stop sending outgoing datagrams
* @cancellable: (nullable): a #GCancellable, or %NULL
* @error: a #GError, or %NULL
*
* Shut down part or all of a DTLS connection.
*
* If @shutdown_read is %TRUE then the receiving side of the connection is shut
* down, and further reading is disallowed. Subsequent calls to
* g_datagram_based_receive_messages() will return %G_IO_ERROR_CLOSED.
*
* If @shutdown_write is %TRUE then the sending side of the connection is shut
* down, and further writing is disallowed. Subsequent calls to
* g_datagram_based_send_messages() will return %G_IO_ERROR_CLOSED.
*
* It is allowed for both @shutdown_read and @shutdown_write to be TRUE — this
* is equivalent to calling g_dtls_connection_close().
*
* If @cancellable is cancelled, the #GDtlsConnection may be left
* partially-closed and any pending untransmitted data may be lost. Call
* g_dtls_connection_shutdown() again to complete closing the #GDtlsConnection.
*
* Returns: %TRUE on success, %FALSE otherwise
*
* Since: 2.48
*/
gboolean
g_dtls_connection_shutdown (GDtlsConnection *conn,
gboolean shutdown_read,
gboolean shutdown_write,
GCancellable *cancellable,
GError **error)
{
GDtlsConnectionInterface *iface;
g_return_val_if_fail (G_IS_DTLS_CONNECTION (conn), FALSE);
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable),
FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
if (!shutdown_read && !shutdown_write)
return TRUE;
iface = G_DTLS_CONNECTION_GET_INTERFACE (conn);
g_assert (iface->shutdown != NULL);
return iface->shutdown (conn, shutdown_read, shutdown_write,
cancellable, error);
}
/**
* g_dtls_connection_shutdown_async:
* @conn: a #GDtlsConnection
* @shutdown_read: %TRUE to stop reception of incoming datagrams
* @shutdown_write: %TRUE to stop sending outgoing datagrams
* @io_priority: the [I/O priority][io-priority] of the request
* @cancellable: (nullable): a #GCancellable, or %NULL
* @callback: callback to call when the shutdown operation is complete
* @user_data: the data to pass to the callback function
*
* Asynchronously shut down part or all of the DTLS connection. See
* g_dtls_connection_shutdown() for more information.
*
* Since: 2.48
*/
void
g_dtls_connection_shutdown_async (GDtlsConnection *conn,
gboolean shutdown_read,
gboolean shutdown_write,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GDtlsConnectionInterface *iface;
g_return_if_fail (G_IS_DTLS_CONNECTION (conn));
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
iface = G_DTLS_CONNECTION_GET_INTERFACE (conn);
g_assert (iface->shutdown_async != NULL);
iface->shutdown_async (conn, TRUE, TRUE, io_priority, cancellable,
callback, user_data);
}
/**
* g_dtls_connection_shutdown_finish:
* @conn: a #GDtlsConnection
* @result: a #GAsyncResult
* @error: a #GError pointer, or %NULL
*
* Finish an asynchronous TLS shutdown operation. See
* g_dtls_connection_shutdown() for more information.
*
* Returns: %TRUE on success, %FALSE on failure, in which
* case @error will be set
*
* Since: 2.48
*/
gboolean
g_dtls_connection_shutdown_finish (GDtlsConnection *conn,
GAsyncResult *result,
GError **error)
{
GDtlsConnectionInterface *iface;
g_return_val_if_fail (G_IS_DTLS_CONNECTION (conn), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
iface = G_DTLS_CONNECTION_GET_INTERFACE (conn);
g_assert (iface->shutdown_finish != NULL);
return iface->shutdown_finish (conn, result, error);
}
/**
* g_dtls_connection_close:
* @conn: a #GDtlsConnection
* @cancellable: (nullable): a #GCancellable, or %NULL
* @error: a #GError, or %NULL
*
* Close the DTLS connection. This is equivalent to calling
* g_dtls_connection_shutdown() to shut down both sides of the connection.
*
* Closing a #GDtlsConnection waits for all buffered but untransmitted data to
* be sent before it completes. It then sends a `close_notify` DTLS alert to the
* peer and may wait for a `close_notify` to be received from the peer. It does
* not close the underlying #GDtlsConnection:base-socket; that must be closed
* separately.
*
* Once @conn is closed, all other operations will return %G_IO_ERROR_CLOSED.
* Closing a #GDtlsConnection multiple times will not return an error.
*
* #GDtlsConnections will be automatically closed when the last reference is
* dropped, but you might want to call this function to make sure resources are
* released as early as possible.
*
* If @cancellable is cancelled, the #GDtlsConnection may be left
* partially-closed and any pending untransmitted data may be lost. Call
* g_dtls_connection_close() again to complete closing the #GDtlsConnection.
*
* Returns: %TRUE on success, %FALSE otherwise
*
* Since: 2.48
*/
gboolean
g_dtls_connection_close (GDtlsConnection *conn,
GCancellable *cancellable,
GError **error)
{
g_return_val_if_fail (G_IS_DTLS_CONNECTION (conn), FALSE);
g_return_val_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable),
FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
return G_DTLS_CONNECTION_GET_INTERFACE (conn)->shutdown (conn, TRUE, TRUE,
cancellable, error);
}
/**
* g_dtls_connection_close_async:
* @conn: a #GDtlsConnection
* @io_priority: the [I/O priority][io-priority] of the request
* @cancellable: (nullable): a #GCancellable, or %NULL
* @callback: callback to call when the close operation is complete
* @user_data: the data to pass to the callback function
*
* Asynchronously close the DTLS connection. See g_dtls_connection_close() for
* more information.
*
* Since: 2.48
*/
void
g_dtls_connection_close_async (GDtlsConnection *conn,
int io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_return_if_fail (G_IS_DTLS_CONNECTION (conn));
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
G_DTLS_CONNECTION_GET_INTERFACE (conn)->shutdown_async (conn, TRUE, TRUE,
io_priority,
cancellable,
callback, user_data);
}
/**
* g_dtls_connection_close_finish:
* @conn: a #GDtlsConnection
* @result: a #GAsyncResult
* @error: a #GError pointer, or %NULL
*
* Finish an asynchronous TLS close operation. See g_dtls_connection_close()
* for more information.
*
* Returns: %TRUE on success, %FALSE on failure, in which
* case @error will be set
*
* Since: 2.48
*/
gboolean
g_dtls_connection_close_finish (GDtlsConnection *conn,
GAsyncResult *result,
GError **error)
{
g_return_val_if_fail (G_IS_DTLS_CONNECTION (conn), FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
return G_DTLS_CONNECTION_GET_INTERFACE (conn)->shutdown_finish (conn, result,
error);
}
/**
* g_dtls_connection_emit_accept_certificate:
* @conn: a #GDtlsConnection
* @peer_cert: the peer's #GTlsCertificate
* @errors: the problems with @peer_cert
*
* Used by #GDtlsConnection implementations to emit the
* #GDtlsConnection::accept-certificate signal.
*
* Returns: %TRUE if one of the signal handlers has returned
* %TRUE to accept @peer_cert
*
* Since: 2.48
*/
gboolean
g_dtls_connection_emit_accept_certificate (GDtlsConnection *conn,
GTlsCertificate *peer_cert,
GTlsCertificateFlags errors)
{
gboolean accept = FALSE;
g_signal_emit (conn, signals[ACCEPT_CERTIFICATE], 0,
peer_cert, errors, &accept);
return accept;
}
/**
* g_dtls_connection_set_advertised_protocols:
* @conn: a #GDtlsConnection
* @protocols: (array zero-terminated=1) (nullable): a %NULL-terminated
* array of ALPN protocol names (eg, "http/1.1", "h2"), or %NULL
*
* Sets the list of application-layer protocols to advertise that the
* caller is willing to speak on this connection. The
* Application-Layer Protocol Negotiation (ALPN) extension will be
* used to negotiate a compatible protocol with the peer; use
* g_dtls_connection_get_negotiated_protocol() to find the negotiated
* protocol after the handshake. Specifying %NULL for the the value
* of @protocols will disable ALPN negotiation.
*
* See [IANA TLS ALPN Protocol IDs](https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids)
* for a list of registered protocol IDs.
*
* Since: 2.60
*/
void
g_dtls_connection_set_advertised_protocols (GDtlsConnection *conn,
const gchar * const *protocols)
{
GDtlsConnectionInterface *iface;
iface = G_DTLS_CONNECTION_GET_INTERFACE (conn);
if (iface->set_advertised_protocols == NULL)
return;
iface->set_advertised_protocols (conn, protocols);
}
/**
* g_dtls_connection_get_negotiated_protocol:
* @conn: a #GDtlsConnection
*
* Gets the name of the application-layer protocol negotiated during
* the handshake.
*
* If the peer did not use the ALPN extension, or did not advertise a
* protocol that matched one of @conn's protocols, or the TLS backend
* does not support ALPN, then this will be %NULL. See
* g_dtls_connection_set_advertised_protocols().
*
* Returns: (nullable): the negotiated protocol, or %NULL
*
* Since: 2.60
*/
const gchar *
g_dtls_connection_get_negotiated_protocol (GDtlsConnection *conn)
{
GDtlsConnectionInterface *iface;
iface = G_DTLS_CONNECTION_GET_INTERFACE (conn);
if (iface->set_advertised_protocols == NULL)
return NULL;
return iface->get_negotiated_protocol (conn);
}
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