Gio.DtlsConnection (original) (raw)

Interface

GioDtlsConnection

since: 2.48

Description [src]

interface Gio.DtlsConnection : Gio.DatagramBased

GDtlsConnection is the base DTLS connection class type, which wraps a GDatagramBased and provides DTLS encryption on top of it. Its subclasses, GDtlsClientConnection andGDtlsServerConnection, implement client-side and server-side DTLS, respectively.

For TLS support, see GTlsConnection.

As DTLS is datagram based, GDtlsConnection implementsGDatagramBased, 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 GDtlsClientConnectionset the peer address on their base GDatagramBased if it is aGSocket — 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, theGDtlsConnection will not raise a G_IO_ERROR_NOT_CONNECTED error on further I/O.

Available since: 2.48

Prerequisite

In order to implement DtlsConnection, your type must inherit fromGDatagramBased.

Instance methods

g_dtls_connection_close

Close the DTLS connection. This is equivalent to callingg_dtls_connection_shutdown() to shut down both sides of the connection.

since: 2.48

g_dtls_connection_get_ciphersuite_name

Returns the name of the current DTLS ciphersuite, or NULL if the connection has not handshaked or has been closed. Beware that the TLSbackend may use any of multiple different naming conventions, because OpenSSL and GnuTLS have their own ciphersuite naming conventions that are different from each other and different from the standard, IANA- registered ciphersuite names. The ciphersuite name is intended to be displayed to the user for informative purposes only, and parsing it is not recommended.

since: 2.70

g_dtls_connection_get_database

Gets the certificate database that conn uses to verify peer certificates. See g_dtls_connection_set_database().

since: 2.48

g_dtls_connection_get_interaction

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.

since: 2.48

g_dtls_connection_get_peer_certificate

Gets conn‘s peer’s certificate after the handshake has completed or failed. (It is not set during the emission ofGDtlsConnection::accept-certificate.).

since: 2.48

g_dtls_connection_get_peer_certificate_errors

Gets the errors associated with validating conn‘s peer’s certificate, after the handshake has completed or failed. (It is not set during the emission of GDtlsConnection::accept-certificate.).

since: 2.48

g_dtls_connection_get_protocol_version

Returns the current DTLS protocol version, which may beG_TLS_PROTOCOL_VERSION_UNKNOWN if the connection has not handshaked, or has been closed, or if the TLS backend has implemented a protocol version that is not a recognized GTlsProtocolVersion.

since: 2.70

g_dtls_connection_get_require_close_notify

Tests whether or not conn expects a proper TLS close notification when the connection is closed. Seeg_dtls_connection_set_require_close_notify() for details.

since: 2.48

g_dtls_connection_set_advertised_protocols

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; useg_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.

since: 2.60

g_dtls_connection_set_certificate

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.

since: 2.48

g_dtls_connection_set_database

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 theG_TLS_CERTIFICATE_UNKNOWN_CA error (meaningGDtlsConnection::accept-certificate will always be emitted on client-side connections, unless that bit is not set inGDtlsClientConnection:validation-flags).

since: 2.48

g_dtls_connection_set_interaction

Set the object that will be used to interact with the user. It will be used for things like prompting the user for passwords.

since: 2.48

g_dtls_connection_set_rehandshake_mode

Since GLib 2.64, changing the rehandshake mode is no longer supported and will have no effect. With TLS 1.3, rehandshaking has been removed from the TLS protocol, replaced by separate post-handshake authentication and rekey operations.

deprecated: 2.60. since: 2.48

g_dtls_connection_set_require_close_notify

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 aG_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).

since: 2.48

g_dtls_connection_shutdown_async

Asynchronously shut down part or all of the DTLS connection. Seeg_dtls_connection_shutdown() for more information.

since: 2.48

Properties

Gio.DtlsConnection: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

Gio.DtlsConnection:base-socket

The GDatagramBased that the connection wraps. Note that this may be any implementation of GDatagramBased, not just a GSocket.

since: 2.48

Gio.DtlsConnection: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

Gio.DtlsConnection: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

Gio.DtlsConnection:peer-certificate

The connection’s peer’s certificate, after the TLS handshake has completed or failed. Note in particular that this is not yet set during the emission of GDtlsConnection::accept-certificate.

since: 2.48

Gio.DtlsConnection:peer-certificate-errors

The errors noticed while verifyingGDtlsConnection:peer-certificate. Normally this should be 0, but it may not be if GDtlsClientConnection:validation-flags is notG_TLS_CERTIFICATE_VALIDATE_ALL, or ifGDtlsConnection::accept-certificate overrode the default behavior.

since: 2.48

Signals

Gio.DtlsConnection::accept-certificate

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.

since: 2.48

Interface structure

struct GioDtlsConnectionInterface {
  GTypeInterface g_iface;
  gboolean (* accept_certificate) (
    GDtlsConnection* connection,
    GTlsCertificate* peer_cert,
    GTlsCertificateFlags errors
  );
  gboolean (* handshake) (
    GDtlsConnection* conn,
    GCancellable* cancellable,
    GError** error
  );
  void (* handshake_async) (
    GDtlsConnection* conn,
    int io_priority,
    GCancellable* cancellable,
    GAsyncReadyCallback callback,
    gpointer user_data
  );
  gboolean (* handshake_finish) (
    GDtlsConnection* conn,
    GAsyncResult* result,
    GError** error
  );
  gboolean (* shutdown) (
    GDtlsConnection* conn,
    gboolean shutdown_read,
    gboolean shutdown_write,
    GCancellable* cancellable,
    GError** error
  );
  void (* shutdown_async) (
    GDtlsConnection* conn,
    gboolean shutdown_read,
    gboolean shutdown_write,
    int io_priority,
    GCancellable* cancellable,
    GAsyncReadyCallback callback,
    gpointer user_data
  );
  gboolean (* shutdown_finish) (
    GDtlsConnection* conn,
    GAsyncResult* result,
    GError** error
  );
  void (* set_advertised_protocols) (
    GDtlsConnection* conn,
    const gchar* const* protocols
  );
  const gchar* (* get_negotiated_protocol) (
    GDtlsConnection* conn
  );
  gboolean (* get_binding_data) (
    GDtlsConnection* conn,
    GTlsChannelBindingType type,
    GByteArray* data,
    GError** error
  );
  
}

Virtual method table for a GDtlsConnection implementation.

Interface members

Virtual methods

Gio.DtlsConnection.set_advertised_protocols

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; useg_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.

since: 2.60