/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
   Copyright (C) 2010 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 2.1 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/>.
*/
#ifndef __SPICE_CLIENT_CHANNEL_H__
#define __SPICE_CLIENT_CHANNEL_H__

#if !defined(__SPICE_CLIENT_H_INSIDE__) && !defined(SPICE_COMPILATION)
#warning "Only <spice-client.h> can be included directly"
#endif

#include <gio/gio.h>

#include "spice-types.h"
#include "spice-glib-enums.h"
#include "spice-util.h"

G_BEGIN_DECLS

#define SPICE_TYPE_CHANNEL            (spice_channel_get_type ())
#define SPICE_CHANNEL(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), SPICE_TYPE_CHANNEL, SpiceChannel))
#define SPICE_CHANNEL_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), SPICE_TYPE_CHANNEL, SpiceChannelClass))
#define SPICE_IS_CHANNEL(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), SPICE_TYPE_CHANNEL))
#define SPICE_IS_CHANNEL_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), SPICE_TYPE_CHANNEL))
#define SPICE_CHANNEL_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), SPICE_TYPE_CHANNEL, SpiceChannelClass))

typedef struct _SpiceMsgIn  SpiceMsgIn;
typedef struct _SpiceMsgOut SpiceMsgOut;

/**
 * SpiceChannelEvent:
 * @SPICE_CHANNEL_NONE: no event, or ignored event
 * @SPICE_CHANNEL_OPENED: connection is authentified and ready
 * @SPICE_CHANNEL_SWITCHING: disconnecting from the current host and connecting to the target host.
 * @SPICE_CHANNEL_CLOSED: connection is closed normally (sent if channel was ready)
 * @SPICE_CHANNEL_ERROR_CONNECT: connection error
 * @SPICE_CHANNEL_ERROR_TLS: SSL error
 * @SPICE_CHANNEL_ERROR_LINK: error during link process
 * @SPICE_CHANNEL_ERROR_AUTH: authentication error
 * @SPICE_CHANNEL_ERROR_IO: IO error
 *
 * An event, emitted by #SpiceChannel::channel-event signal.
 **/
typedef enum
{
    SPICE_CHANNEL_NONE = 0,
    SPICE_CHANNEL_OPENED = 10,
    SPICE_CHANNEL_SWITCHING,
    SPICE_CHANNEL_CLOSED,
    SPICE_CHANNEL_ERROR_CONNECT = 20,
    SPICE_CHANNEL_ERROR_TLS,
    SPICE_CHANNEL_ERROR_LINK,
    SPICE_CHANNEL_ERROR_AUTH,
    SPICE_CHANNEL_ERROR_IO,
} SpiceChannelEvent;

/**
 * SpiceChannel:
 *
 * The #SpiceChannel struct is opaque and should not be accessed directly.
 */
struct _SpiceChannel
{
    GObject parent;
    SpiceChannelPrivate *priv;
    /* Do not add fields to this struct */
};

typedef struct _SpiceChannelClassPrivate SpiceChannelClassPrivate;

/**
 * SpiceChannelClass:
 * @parent_class: Parent class.
 * @channel_event: Signal class handler for the #SpiceChannel::channel_event signal.
 * @open_fd: Signal class handler for the #SpiceChannel::open_fd signal.
 *
 * Class structure for #SpiceChannel.
 */
struct _SpiceChannelClass
{
    GObjectClass parent_class;

    /*< public >*/
    /* signals, main context */
    void (*channel_event)(SpiceChannel *channel, SpiceChannelEvent event);
    void (*open_fd)(SpiceChannel *channel, int with_tls);

    /*< private >*/
    /* virtual methods, coroutine context */
    void (*handle_msg)(SpiceChannel *channel, SpiceMsgIn *msg);
    void (*channel_up)(SpiceChannel *channel);
    void (*iterate_write)(SpiceChannel *channel);
    void (*iterate_read)(SpiceChannel *channel);

    /*< private >*/
    /* virtual method, any context */
    gpointer deprecated;
    void (*channel_reset)(SpiceChannel *channel, gboolean migrating);
    void (*channel_reset_capabilities)(SpiceChannel *channel);

    /*< private >*/
    /* virtual methods, coroutine context */
    void (*channel_send_migration_handshake)(SpiceChannel *channel);

    SpiceChannelClassPrivate *priv;
    /*
     * If adding fields to this struct, remove corresponding
     * amount of padding to avoid changing overall struct size
     */
    gchar _spice_reserved[SPICE_RESERVED_PADDING - 2 * sizeof(void *)];
};

GType spice_channel_get_type(void);

typedef void (*spice_msg_handler)(SpiceChannel *channel, SpiceMsgIn *in);

SpiceChannel *spice_channel_new(SpiceSession *s, int type, int id);
gboolean spice_channel_connect(SpiceChannel *channel);
gboolean spice_channel_open_fd(SpiceChannel *channel, int fd);
void spice_channel_disconnect(SpiceChannel *channel, SpiceChannelEvent reason);
gboolean spice_channel_test_capability(SpiceChannel *channel, guint32 cap);
gboolean spice_channel_test_common_capability(SpiceChannel *channel, guint32 cap);
void spice_channel_flush_async(SpiceChannel *channel, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data);
gboolean spice_channel_flush_finish(SpiceChannel *channel, GAsyncResult *result, GError **error);
#ifndef SPICE_DISABLE_DEPRECATED
SPICE_DEPRECATED
void spice_channel_set_capability(SpiceChannel *channel, guint32 cap);
SPICE_DEPRECATED
void spice_channel_destroy(SpiceChannel *channel);
#endif

const gchar* spice_channel_type_to_string(gint type);
gint spice_channel_string_to_type(const gchar *str);

const GError* spice_channel_get_error(SpiceChannel *channel);

G_END_DECLS

#endif /* __SPICE_CLIENT_CHANNEL_H__ */