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Add websocket module.

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Webassembly is client-only for obvious reasons.
Other platforms support both client and server using libwebsockets.
This commit is contained in:
Fabio Alessandrelli 2017-12-21 03:13:23 +01:00
parent fa33e0f62d
commit 6a644d3ee1
26 changed files with 2847 additions and 0 deletions
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176
modules/websocket/lws_server.cpp Normal file
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/*************************************************************************/
/* lws_server.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT WEBSOCKET MODULE */
/* https://github.com/LudiDorici/godot-websocket */
/*************************************************************************/
/* Copyright (c) 2017 Ludi Dorici, di Alessandrelli Fabio */
/* */
/* 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"
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);
if (p_protocols.size() == 0) // default to binary protocol
p_protocols.append(String("binary"));
// 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::_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);
_peer_map[id] = peer;
peer_data->peer_id = id;
peer_data->in_size = 0;
peer_data->in_count = 0;
peer_data->out_count = 0;
peer_data->rbw.resize(16);
peer_data->rbr.resize(16);
peer_data->force_close = false;
_on_connect(id, lws_get_protocol(wsi)->name);
break;
}
case LWS_CALLBACK_CLOSED: {
if (peer_data == NULL)
return 0;
int32_t id = peer_data->peer_id;
if (_peer_map.has(id)) {
_peer_map[id]->close();
_peer_map.erase(id);
}
peer_data->in_count = 0;
peer_data->out_count = 0;
peer_data->rbr.resize(0);
peer_data->rbw.resize(0);
_on_disconnect(id);
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: {
if (peer_data->force_close)
return -1;
int id = peer_data->peer_id;
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];
}
LWSServer::LWSServer() {
context = NULL;
_lws_ref = NULL;
}
LWSServer::~LWSServer() {
invalidate_lws_ref(); // we do not want any more callbacks
stop();
}
#endif // JAVASCRIPT_ENABLED