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c8198bd5f9
There is no "version 2" of the "Lesser" General Public License. It is either "GPL version 2.0" or "Lesser GPL version 2.1". This patch replaces all occurrences of "Lesser GPL version 2" with "Lesser GPL version 2.1" in comment section. Signed-off-by: Chetan Pant <chetan4windows@gmail.com> Acked-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20201014134033.14095-1-chetan4windows@gmail.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
109 lines
3.3 KiB
C
109 lines
3.3 KiB
C
/*
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* QEMU I/O channels driver websockets
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*
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* Copyright (c) 2015 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef QIO_CHANNEL_WEBSOCK_H
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#define QIO_CHANNEL_WEBSOCK_H
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#include "io/channel.h"
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#include "qemu/buffer.h"
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#include "io/task.h"
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#include "qom/object.h"
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#define TYPE_QIO_CHANNEL_WEBSOCK "qio-channel-websock"
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OBJECT_DECLARE_SIMPLE_TYPE(QIOChannelWebsock, QIO_CHANNEL_WEBSOCK)
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typedef union QIOChannelWebsockMask QIOChannelWebsockMask;
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union QIOChannelWebsockMask {
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char c[4];
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uint32_t u;
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};
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/**
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* QIOChannelWebsock
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*
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* The QIOChannelWebsock class provides a channel wrapper which
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* can transparently run the HTTP websockets protocol. This is
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* usually used over a TCP socket, but there is actually no
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* technical restriction on which type of master channel is
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* used as the transport.
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*
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* This channel object is currently only capable of running as
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* a websocket server and is a pretty crude implementation
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* of it, not supporting the full websockets protocol feature
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* set. It is sufficient to use with a simple websockets
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* client for encapsulating VNC for noVNC in-browser client.
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*/
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struct QIOChannelWebsock {
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QIOChannel parent;
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QIOChannel *master;
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Buffer encinput;
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Buffer encoutput;
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Buffer rawinput;
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size_t payload_remain;
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size_t pong_remain;
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QIOChannelWebsockMask mask;
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guint io_tag;
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Error *io_err;
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gboolean io_eof;
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uint8_t opcode;
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};
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/**
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* qio_channel_websock_new_server:
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* @master: the underlying channel object
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*
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* Create a new websockets channel that runs the server
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* side of the protocol.
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*
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* After creating the channel, it is mandatory to call
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* the qio_channel_websock_handshake() method before attempting
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* todo any I/O on the channel.
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*
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* Once the handshake has completed, all I/O should be done
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* via the new websocket channel object and not the original
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* master channel
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*
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* Returns: the new websockets channel object
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*/
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QIOChannelWebsock *
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qio_channel_websock_new_server(QIOChannel *master);
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/**
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* qio_channel_websock_handshake:
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* @ioc: the websocket channel object
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* @func: the callback to invoke when completed
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* @opaque: opaque data to pass to @func
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* @destroy: optional callback to free @opaque
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*
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* Perform the websocket handshake. This method
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* will return immediately and the handshake will
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* continue in the background, provided the main
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* loop is running. When the handshake is complete,
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* or fails, the @func callback will be invoked.
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*/
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void qio_channel_websock_handshake(QIOChannelWebsock *ioc,
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QIOTaskFunc func,
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gpointer opaque,
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GDestroyNotify destroy);
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#endif /* QIO_CHANNEL_WEBSOCK_H */
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