mirror of
https://github.com/qemu/qemu.git
synced 2024-12-19 10:13:43 +08:00
8dfd5f9651
Currently most outbound I/O on the websock channel gets copied into the rawoutput buffer, and then immediately copied again into the encoutput buffer, with a header prepended. Now that qio_channel_websock_encode accepts a struct iovec, we can trivially remove this bounce buffering and write directly to encoutput. In doing so, we also now correctly validate the encoutput size against the QIO_CHANNEL_WEBSOCK_MAX_BUFFER limit. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
110 lines
3.4 KiB
C
110 lines
3.4 KiB
C
/*
|
|
* QEMU I/O channels driver websockets
|
|
*
|
|
* Copyright (c) 2015 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/>.
|
|
*
|
|
*/
|
|
|
|
#ifndef QIO_CHANNEL_WEBSOCK_H
|
|
#define QIO_CHANNEL_WEBSOCK_H
|
|
|
|
#include "io/channel.h"
|
|
#include "qemu/buffer.h"
|
|
#include "io/task.h"
|
|
|
|
#define TYPE_QIO_CHANNEL_WEBSOCK "qio-channel-websock"
|
|
#define QIO_CHANNEL_WEBSOCK(obj) \
|
|
OBJECT_CHECK(QIOChannelWebsock, (obj), TYPE_QIO_CHANNEL_WEBSOCK)
|
|
|
|
typedef struct QIOChannelWebsock QIOChannelWebsock;
|
|
typedef union QIOChannelWebsockMask QIOChannelWebsockMask;
|
|
|
|
union QIOChannelWebsockMask {
|
|
char c[4];
|
|
uint32_t u;
|
|
};
|
|
|
|
/**
|
|
* QIOChannelWebsock
|
|
*
|
|
* The QIOChannelWebsock class provides a channel wrapper which
|
|
* can transparently run the HTTP websockets protocol. This is
|
|
* usually used over a TCP socket, but there is actually no
|
|
* technical restriction on which type of master channel is
|
|
* used as the transport.
|
|
*
|
|
* This channel object is currently only capable of running as
|
|
* a websocket server and is a pretty crude implementation
|
|
* of it, not supporting the full websockets protocol feature
|
|
* set. It is sufficient to use with a simple websockets
|
|
* client for encapsulating VNC for noVNC in-browser client.
|
|
*/
|
|
|
|
struct QIOChannelWebsock {
|
|
QIOChannel parent;
|
|
QIOChannel *master;
|
|
Buffer encinput;
|
|
Buffer encoutput;
|
|
Buffer rawinput;
|
|
size_t payload_remain;
|
|
size_t pong_remain;
|
|
QIOChannelWebsockMask mask;
|
|
guint io_tag;
|
|
Error *io_err;
|
|
gboolean io_eof;
|
|
uint8_t opcode;
|
|
};
|
|
|
|
/**
|
|
* qio_channel_websock_new_server:
|
|
* @master: the underlying channel object
|
|
*
|
|
* Create a new websockets channel that runs the server
|
|
* side of the protocol.
|
|
*
|
|
* After creating the channel, it is mandatory to call
|
|
* the qio_channel_websock_handshake() method before attempting
|
|
* todo any I/O on the channel.
|
|
*
|
|
* Once the handshake has completed, all I/O should be done
|
|
* via the new websocket channel object and not the original
|
|
* master channel
|
|
*
|
|
* Returns: the new websockets channel object
|
|
*/
|
|
QIOChannelWebsock *
|
|
qio_channel_websock_new_server(QIOChannel *master);
|
|
|
|
/**
|
|
* qio_channel_websock_handshake:
|
|
* @ioc: the websocket channel object
|
|
* @func: the callback to invoke when completed
|
|
* @opaque: opaque data to pass to @func
|
|
* @destroy: optional callback to free @opaque
|
|
*
|
|
* Perform the websocket handshake. This method
|
|
* will return immediately and the handshake will
|
|
* continue in the background, provided the main
|
|
* loop is running. When the handshake is complete,
|
|
* or fails, the @func callback will be invoked.
|
|
*/
|
|
void qio_channel_websock_handshake(QIOChannelWebsock *ioc,
|
|
QIOTaskFunc func,
|
|
gpointer opaque,
|
|
GDestroyNotify destroy);
|
|
|
|
#endif /* QIO_CHANNEL_WEBSOCK_H */
|