godot/modules/websocket/lws_server.cpp
2019-06-15 16:57:23 +02:00

226 lines
6.8 KiB
C++

/*************************************************************************/
/* lws_server.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef JAVASCRIPT_ENABLED
#include "lws_server.h"
#include "core/os/os.h"
#include "core/project_settings.h"
Error LWSServer::listen(int p_port, PoolVector<String> p_protocols, bool gd_mp_api) {
ERR_FAIL_COND_V(context != NULL, FAILED);
_is_multiplayer = gd_mp_api;
struct lws_context_creation_info info;
memset(&info, 0, sizeof info);
// Prepare lws protocol structs
_lws_make_protocols(this, &LWSServer::_lws_gd_callback, p_protocols, &_lws_ref);
info.port = p_port;
info.user = _lws_ref;
info.protocols = _lws_ref->lws_structs;
info.gid = -1;
info.uid = -1;
//info.ws_ping_pong_interval = 5;
context = lws_create_context(&info);
if (context == NULL) {
_lws_free_ref(_lws_ref);
_lws_ref = NULL;
ERR_EXPLAIN("Unable to create LWS context");
ERR_FAIL_V(FAILED);
}
return OK;
}
bool LWSServer::is_listening() const {
return context != NULL;
}
int LWSServer::get_max_packet_size() const {
return (1 << _out_buf_size) - PROTO_SIZE;
}
int LWSServer::_handle_cb(struct lws *wsi, enum lws_callback_reasons reason, void *user, void *in, size_t len) {
LWSPeer::PeerData *peer_data = (LWSPeer::PeerData *)user;
switch (reason) {
case LWS_CALLBACK_HTTP:
// no http for now
// closing immediately returning -1;
return -1;
case LWS_CALLBACK_FILTER_PROTOCOL_CONNECTION:
// check header here?
break;
case LWS_CALLBACK_ESTABLISHED: {
int32_t id = _gen_unique_id();
Ref<LWSPeer> peer = Ref<LWSPeer>(memnew(LWSPeer));
peer->set_wsi(wsi, _in_buf_size, _in_pkt_size, _out_buf_size, _out_pkt_size);
_peer_map[id] = peer;
peer_data->peer_id = id;
peer_data->force_close = false;
peer_data->clean_close = false;
_on_connect(id, lws_get_protocol(wsi)->name);
break;
}
case LWS_CALLBACK_WS_PEER_INITIATED_CLOSE: {
if (peer_data == NULL)
return 0;
int32_t id = peer_data->peer_id;
if (_peer_map.has(id)) {
int code;
Ref<LWSPeer> peer = _peer_map[id];
String reason2 = peer->get_close_reason(in, len, code);
peer_data->clean_close = true;
_on_close_request(id, code, reason2);
}
return 0;
}
case LWS_CALLBACK_CLOSED: {
if (peer_data == NULL)
return 0;
int32_t id = peer_data->peer_id;
bool clean = peer_data->clean_close;
if (_peer_map.has(id)) {
_peer_map[id]->close();
_peer_map.erase(id);
}
_on_disconnect(id, clean);
return 0; // we can end here
}
case LWS_CALLBACK_RECEIVE: {
int32_t id = peer_data->peer_id;
if (_peer_map.has(id)) {
static_cast<Ref<LWSPeer> >(_peer_map[id])->read_wsi(in, len);
if (_peer_map[id]->get_available_packet_count() > 0)
_on_peer_packet(id);
}
break;
}
case LWS_CALLBACK_SERVER_WRITEABLE: {
int id = peer_data->peer_id;
if (peer_data->force_close) {
if (_peer_map.has(id)) {
Ref<LWSPeer> peer = _peer_map[id];
peer->send_close_status(wsi);
}
return -1;
}
if (_peer_map.has(id))
static_cast<Ref<LWSPeer> >(_peer_map[id])->write_wsi();
break;
}
default:
break;
}
return 0;
}
void LWSServer::stop() {
if (context == NULL)
return;
_peer_map.clear();
destroy_context();
context = NULL;
}
bool LWSServer::has_peer(int p_id) const {
return _peer_map.has(p_id);
}
Ref<WebSocketPeer> LWSServer::get_peer(int p_id) const {
ERR_FAIL_COND_V(!has_peer(p_id), NULL);
return _peer_map[p_id];
}
IP_Address LWSServer::get_peer_address(int p_peer_id) const {
ERR_FAIL_COND_V(!has_peer(p_peer_id), IP_Address());
return _peer_map[p_peer_id]->get_connected_host();
}
int LWSServer::get_peer_port(int p_peer_id) const {
ERR_FAIL_COND_V(!has_peer(p_peer_id), 0);
return _peer_map[p_peer_id]->get_connected_port();
}
void LWSServer::disconnect_peer(int p_peer_id, int p_code, String p_reason) {
ERR_FAIL_COND(!has_peer(p_peer_id));
get_peer(p_peer_id)->close(p_code, p_reason);
}
Error LWSServer::set_buffers(int p_in_buffer, int p_in_packets, int p_out_buffer, int p_out_packets) {
ERR_EXPLAIN("Buffers sizes can only be set before listening or connecting");
ERR_FAIL_COND_V(context != NULL, FAILED);
_in_buf_size = nearest_shift(p_in_buffer - 1) + 10;
_in_pkt_size = nearest_shift(p_in_packets - 1);
_out_buf_size = nearest_shift(p_out_buffer - 1) + 10;
_out_pkt_size = nearest_shift(p_out_packets - 1);
return OK;
}
LWSServer::LWSServer() {
_in_buf_size = nearest_shift((int)GLOBAL_GET(WSS_IN_BUF) - 1) + 10;
_in_pkt_size = nearest_shift((int)GLOBAL_GET(WSS_IN_PKT) - 1);
_out_buf_size = nearest_shift((int)GLOBAL_GET(WSS_OUT_BUF) - 1) + 10;
_out_pkt_size = nearest_shift((int)GLOBAL_GET(WSS_OUT_PKT) - 1);
context = NULL;
_lws_ref = NULL;
}
LWSServer::~LWSServer() {
invalidate_lws_ref(); // we do not want any more callbacks
stop();
}
#endif // JAVASCRIPT_ENABLED