1/**************************************************************************/
2/* emws_peer.h */
3/**************************************************************************/
4/* This file is part of: */
5/* GODOT ENGINE */
6/* https://godotengine.org */
7/**************************************************************************/
8/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
9/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
10/* */
11/* Permission is hereby granted, free of charge, to any person obtaining */
12/* a copy of this software and associated documentation files (the */
13/* "Software"), to deal in the Software without restriction, including */
14/* without limitation the rights to use, copy, modify, merge, publish, */
15/* distribute, sublicense, and/or sell copies of the Software, and to */
16/* permit persons to whom the Software is furnished to do so, subject to */
17/* the following conditions: */
18/* */
19/* The above copyright notice and this permission notice shall be */
20/* included in all copies or substantial portions of the Software. */
21/* */
22/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
23/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
24/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
25/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
26/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
27/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
28/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
29/**************************************************************************/
30
31#ifndef EMWS_PEER_H
32#define EMWS_PEER_H
33
34#ifdef WEB_ENABLED
35
36#include "packet_buffer.h"
37#include "websocket_peer.h"
38
39#include "core/error/error_list.h"
40#include "core/io/packet_peer.h"
41#include "core/templates/ring_buffer.h"
42
43#include <emscripten.h>
44
45extern "C" {
46typedef void (*WSOnOpen)(void *p_ref, char *p_protocol);
47typedef void (*WSOnMessage)(void *p_ref, const uint8_t *p_buf, int p_buf_len, int p_is_string);
48typedef void (*WSOnClose)(void *p_ref, int p_code, const char *p_reason, int p_is_clean);
49typedef void (*WSOnError)(void *p_ref);
50
51extern int godot_js_websocket_create(void *p_ref, const char *p_url, const char *p_proto, WSOnOpen p_on_open, WSOnMessage p_on_message, WSOnError p_on_error, WSOnClose p_on_close);
52extern int godot_js_websocket_send(int p_id, const uint8_t *p_buf, int p_buf_len, int p_raw);
53extern int godot_js_websocket_buffered_amount(int p_id);
54extern void godot_js_websocket_close(int p_id, int p_code, const char *p_reason);
55extern void godot_js_websocket_destroy(int p_id);
56}
57
58class EMWSPeer : public WebSocketPeer {
59private:
60 int peer_sock = -1;
61
62 State ready_state = STATE_CLOSED;
63 Vector<uint8_t> packet_buffer;
64 PacketBuffer<uint8_t> in_buffer;
65 uint8_t was_string = 0;
66 int close_code = -1;
67 String close_reason;
68 String selected_protocol;
69 String requested_url;
70
71 static WebSocketPeer *_create() { return memnew(EMWSPeer); }
72 static void _esws_on_connect(void *obj, char *proto);
73 static void _esws_on_message(void *obj, const uint8_t *p_data, int p_data_size, int p_is_string);
74 static void _esws_on_error(void *obj);
75 static void _esws_on_close(void *obj, int code, const char *reason, int was_clean);
76
77 void _clear();
78 Error _send(const uint8_t *p_buffer, int p_buffer_size, bool p_binary);
79
80public:
81 static void initialize() { WebSocketPeer::_create = EMWSPeer::_create; }
82
83 // PacketPeer
84 virtual int get_available_packet_count() const override;
85 virtual Error get_packet(const uint8_t **r_buffer, int &r_buffer_size) override;
86 virtual Error put_packet(const uint8_t *p_buffer, int p_buffer_size) override;
87 virtual int get_max_packet_size() const override { return packet_buffer.size(); };
88
89 // WebSocketPeer
90 virtual Error send(const uint8_t *p_buffer, int p_buffer_size, WriteMode p_mode) override;
91 virtual Error connect_to_url(const String &p_url, Ref<TLSOptions> p_tls_client_options) override;
92 virtual Error accept_stream(Ref<StreamPeer> p_stream) override;
93 virtual void close(int p_code = 1000, String p_reason = "") override;
94 virtual void poll() override;
95
96 virtual State get_ready_state() const override;
97 virtual int get_close_code() const override;
98 virtual String get_close_reason() const override;
99 virtual int get_current_outbound_buffered_amount() const override;
100
101 virtual IPAddress get_connected_host() const override;
102 virtual uint16_t get_connected_port() const override;
103 virtual String get_selected_protocol() const override;
104 virtual String get_requested_url() const override;
105
106 virtual bool was_string_packet() const override;
107 virtual void set_no_delay(bool p_enabled) override;
108
109 EMWSPeer();
110 ~EMWSPeer();
111};
112
113#endif // WEB_ENABLED
114
115#endif // EMWS_PEER_H
116