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https://github.com/godotengine/godot
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a8950f98dd
This commit is a huge refactor of the websocket module. The module is really old, and some design choices had to be re-evaluated. The WebSocketClient and WebSocketServer classes are now gone, and WebSocketPeer can act as either client or server. The WebSocketMultiplayerPeer class is no longer abstract, and implements the Multiplayer API on top of the lower level WebSocketPeer. WebSocketPeer is now a "raw" peer, like StreamPeerTCP and StreamPeerTLS, so it emits no signal, and just needs polling to update its internal state. To use it as a client, simply call WebSocketPeer.coonect_to_url, then frequently poll the peer until STATE_OPEN is reached and then you can write or read from it, or STATE_CLOSED and then you can check the disconnect code and reason). To implement a server instead, a TCPServer must be created, and the accepted connections needs to be provided to WebSocketPeer.accept_stream (which will perform the HTTP handshake). A full example of a WebSocketServer using TLS will be provided in the demo repository.
125 lines
4.2 KiB
C++
125 lines
4.2 KiB
C++
/*************************************************************************/
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/* packet_buffer.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef PACKET_BUFFER_H
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#define PACKET_BUFFER_H
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#include "core/templates/ring_buffer.h"
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template <class T>
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class PacketBuffer {
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private:
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typedef struct {
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uint32_t size;
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T info;
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} _Packet;
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Vector<_Packet> _packets;
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int _queued = 0;
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int _write_pos = 0;
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int _read_pos = 0;
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RingBuffer<uint8_t> _payload;
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public:
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Error write_packet(const uint8_t *p_payload, uint32_t p_size, const T *p_info) {
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ERR_FAIL_COND_V_MSG(p_payload && (uint32_t)_payload.space_left() < p_size, ERR_OUT_OF_MEMORY, "Buffer payload full! Dropping data.");
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ERR_FAIL_COND_V_MSG(p_info && _queued >= _packets.size(), ERR_OUT_OF_MEMORY, "Too many packets in queue! Dropping data.");
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// If p_info is nullptr, only the payload is written
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if (p_info) {
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ERR_FAIL_COND_V(_write_pos > _packets.size(), ERR_OUT_OF_MEMORY);
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_Packet p;
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p.size = p_size;
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p.info = *p_info;
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_packets.write[_write_pos] = p;
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_queued += 1;
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_write_pos++;
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if (_write_pos >= _packets.size()) {
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_write_pos = 0;
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}
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}
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// If p_payload is nullptr, only the packet information is written.
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if (p_payload) {
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_payload.write((const uint8_t *)p_payload, p_size);
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}
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return OK;
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}
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Error read_packet(uint8_t *r_payload, int p_bytes, T *r_info, int &r_read) {
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ERR_FAIL_COND_V(_queued < 1, ERR_UNAVAILABLE);
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_Packet p = _packets[_read_pos];
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_read_pos += 1;
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if (_read_pos >= _packets.size()) {
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_read_pos = 0;
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}
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_queued -= 1;
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ERR_FAIL_COND_V(_payload.data_left() < (int)p.size, ERR_BUG);
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ERR_FAIL_COND_V(p_bytes < (int)p.size, ERR_OUT_OF_MEMORY);
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r_read = p.size;
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memcpy(r_info, &p.info, sizeof(T));
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_payload.read(r_payload, p.size);
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return OK;
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}
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void resize(int p_buf_shift, int p_max_packets) {
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_payload.resize(p_buf_shift);
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_packets.resize(p_max_packets);
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_read_pos = 0;
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_write_pos = 0;
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_queued = 0;
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}
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int packets_left() const {
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return _queued;
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}
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void clear() {
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_payload.resize(0);
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_packets.resize(0);
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_read_pos = 0;
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_write_pos = 0;
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_queued = 0;
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}
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PacketBuffer() {
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clear();
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}
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~PacketBuffer() {
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clear();
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}
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};
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#endif // PACKET_BUFFER_H
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