1/**************************************************************************/
2/* tcp_server.cpp */
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#include "tcp_server.h"
32
33void TCPServer::_bind_methods() {
34 ClassDB::bind_method(D_METHOD("listen", "port", "bind_address"), &TCPServer::listen, DEFVAL("*"));
35 ClassDB::bind_method(D_METHOD("is_connection_available"), &TCPServer::is_connection_available);
36 ClassDB::bind_method(D_METHOD("is_listening"), &TCPServer::is_listening);
37 ClassDB::bind_method(D_METHOD("get_local_port"), &TCPServer::get_local_port);
38 ClassDB::bind_method(D_METHOD("take_connection"), &TCPServer::take_connection);
39 ClassDB::bind_method(D_METHOD("stop"), &TCPServer::stop);
40}
41
42Error TCPServer::listen(uint16_t p_port, const IPAddress &p_bind_address) {
43 ERR_FAIL_COND_V(!_sock.is_valid(), ERR_UNAVAILABLE);
44 ERR_FAIL_COND_V(_sock->is_open(), ERR_ALREADY_IN_USE);
45 ERR_FAIL_COND_V(!p_bind_address.is_valid() && !p_bind_address.is_wildcard(), ERR_INVALID_PARAMETER);
46
47 Error err;
48 IP::Type ip_type = IP::TYPE_ANY;
49
50 // If the bind address is valid use its type as the socket type
51 if (p_bind_address.is_valid()) {
52 ip_type = p_bind_address.is_ipv4() ? IP::TYPE_IPV4 : IP::TYPE_IPV6;
53 }
54
55 err = _sock->open(NetSocket::TYPE_TCP, ip_type);
56
57 ERR_FAIL_COND_V(err != OK, ERR_CANT_CREATE);
58
59 _sock->set_blocking_enabled(false);
60 _sock->set_reuse_address_enabled(true);
61
62 err = _sock->bind(p_bind_address, p_port);
63
64 if (err != OK) {
65 _sock->close();
66 return ERR_ALREADY_IN_USE;
67 }
68
69 err = _sock->listen(MAX_PENDING_CONNECTIONS);
70
71 if (err != OK) {
72 _sock->close();
73 return FAILED;
74 }
75 return OK;
76}
77
78int TCPServer::get_local_port() const {
79 uint16_t local_port;
80 _sock->get_socket_address(nullptr, &local_port);
81 return local_port;
82}
83
84bool TCPServer::is_listening() const {
85 ERR_FAIL_COND_V(!_sock.is_valid(), false);
86
87 return _sock->is_open();
88}
89
90bool TCPServer::is_connection_available() const {
91 ERR_FAIL_COND_V(!_sock.is_valid(), false);
92
93 if (!_sock->is_open()) {
94 return false;
95 }
96
97 Error err = _sock->poll(NetSocket::POLL_TYPE_IN, 0);
98 return (err == OK);
99}
100
101Ref<StreamPeerTCP> TCPServer::take_connection() {
102 Ref<StreamPeerTCP> conn;
103 if (!is_connection_available()) {
104 return conn;
105 }
106
107 Ref<NetSocket> ns;
108 IPAddress ip;
109 uint16_t port = 0;
110 ns = _sock->accept(ip, port);
111 if (!ns.is_valid()) {
112 return conn;
113 }
114
115 conn = Ref<StreamPeerTCP>(memnew(StreamPeerTCP));
116 conn->accept_socket(ns, ip, port);
117 return conn;
118}
119
120void TCPServer::stop() {
121 if (_sock.is_valid()) {
122 _sock->close();
123 }
124}
125
126TCPServer::TCPServer() :
127 _sock(Ref<NetSocket>(NetSocket::create())) {
128}
129
130TCPServer::~TCPServer() {
131 stop();
132}
133