Merge pull request #22940 from Faless/lws_buffers_bis

Better buffering for WebSocket

core/ring_buffer.h

@@ -135,6 +135,12 @@ public:
 		return p_n;
 	};
 
+	inline int decrease_write(int p_n) {
+		p_n = MIN(p_n, data_left());
+		inc(write_pos, size_mask + 1 - p_n);
+		return p_n;
+	}
+
 	Error write(const T &p_v) {
 		ERR_FAIL_COND_V(space_left() < 1, FAILED);
 		data.write[inc(write_pos, 1)] = p_v;

modules/websocket/emws_client.cpp

@@ -31,6 +31,7 @@
 
 #include "emws_client.h"
 #include "core/io/ip.h"
+#include "core/project_settings.h"
 #include "emscripten.h"
 
 extern "C" {
@@ -43,8 +44,9 @@ EMSCRIPTEN_KEEPALIVE void _esws_on_connect(void *obj, char *proto) {
 EMSCRIPTEN_KEEPALIVE void _esws_on_message(void *obj, uint8_t *p_data, int p_data_size, int p_is_string) {
 	EMWSClient *client = static_cast<EMWSClient *>(obj);
 
-	static_cast<EMWSPeer *>(*client->get_peer(1))->read_msg(p_data, p_data_size, p_is_string == 1);
+	Error err = static_cast<EMWSPeer *>(*client->get_peer(1))->read_msg(p_data, p_data_size, p_is_string == 1);
-	client->_on_peer_packet();
+	if (err == OK)
+		client->_on_peer_packet();
 }
 
 EMSCRIPTEN_KEEPALIVE void _esws_on_error(void *obj) {
@@ -159,7 +161,7 @@ Error EMWSClient::connect_to_host(String p_host, String p_path, uint16_t p_port,
 	}, _js_id, str.utf8().get_data(), proto_string.utf8().get_data());
 	/* clang-format on */
 
-	static_cast<Ref<EMWSPeer> >(_peer)->set_sock(peer_sock);
+	static_cast<Ref<EMWSPeer> >(_peer)->set_sock(peer_sock, _in_buf_size, _in_pkt_size);
 
 	return OK;
 };
@@ -198,7 +200,13 @@ uint16_t EMWSClient::get_connected_port() const {
 	return 1025;
 };
 
+int EMWSClient::get_max_packet_size() const {
+	return (1 << _in_buf_size) - PROTO_SIZE;
+}
+
 EMWSClient::EMWSClient() {
+	_in_buf_size = GLOBAL_GET(WSC_IN_BUF);
+	_in_pkt_size = GLOBAL_GET(WSC_IN_PKT);
 	_is_connecting = false;
 	_peer = Ref<EMWSPeer>(memnew(EMWSPeer));
 	/* clang-format off */

modules/websocket/emws_client.h

@@ -41,6 +41,8 @@ class EMWSClient : public WebSocketClient {
 	GDCIIMPL(EMWSClient, WebSocketClient);
 
 private:
+	int _in_buf_size;
+	int _in_pkt_size;
 	int _js_id;
 
 public:
@@ -52,6 +54,7 @@ public:
 	IP_Address get_connected_host() const;
 	uint16_t get_connected_port() const;
 	virtual ConnectionStatus get_connection_status() const;
+	int get_max_packet_size() const;
 	virtual void poll();
 	EMWSClient();
 	~EMWSClient();

modules/websocket/emws_peer.cpp

@@ -32,11 +32,11 @@
 #include "emws_peer.h"
 #include "core/io/ip.h"
 
-void EMWSPeer::set_sock(int p_sock) {
+void EMWSPeer::set_sock(int p_sock, unsigned int p_in_buf_size, unsigned int p_in_pkt_size) {
 
 	peer_sock = p_sock;
-	in_buffer.clear();
+	_in_buffer.resize(p_in_pkt_size, p_in_buf_size);
-	queue_count = 0;
+	_packet_buffer.resize((1 << p_in_buf_size));
 }
 
 void EMWSPeer::set_write_mode(WriteMode p_mode) {
@@ -47,18 +47,10 @@ EMWSPeer::WriteMode EMWSPeer::get_write_mode() const {
 	return write_mode;
 }
 
-void EMWSPeer::read_msg(uint8_t *p_data, uint32_t p_size, bool p_is_string) {
+Error EMWSPeer::read_msg(uint8_t *p_data, uint32_t p_size, bool p_is_string) {
-
-	if (in_buffer.space_left() < p_size + 5) {
-		ERR_EXPLAIN("Buffer full! Dropping data");
-		ERR_FAIL();
-	}
 
 	uint8_t is_string = p_is_string ? 1 : 0;
-	in_buffer.write((uint8_t *)&p_size, 4);
+	return _in_buffer.write_packet(p_data, p_size, &is_string);
-	in_buffer.write((uint8_t *)&is_string, 1);
-	in_buffer.write(p_data, p_size);
-	queue_count++;
 }
 
 Error EMWSPeer::put_packet(const uint8_t *p_buffer, int p_buffer_size) {
@@ -89,40 +81,28 @@ Error EMWSPeer::put_packet(const uint8_t *p_buffer, int p_buffer_size) {
 
 Error EMWSPeer::get_packet(const uint8_t **r_buffer, int &r_buffer_size) {
 
-	if (queue_count == 0)
+	if (_in_buffer.packets_left() == 0)
 		return ERR_UNAVAILABLE;
 
-	uint32_t to_read = 0;
+	PoolVector<uint8_t>::Write rw = _packet_buffer.write();
-	uint32_t left = 0;
+	int read = 0;
-	uint8_t is_string = 0;
+	Error err = _in_buffer.read_packet(rw.ptr(), _packet_buffer.size(), &_is_string, read);
-	r_buffer_size = 0;
+	ERR_FAIL_COND_V(err != OK, err);
 
-	in_buffer.read((uint8_t *)&to_read, 4);
+	*r_buffer = rw.ptr();
-	--queue_count;
+	r_buffer_size = read;
-	left = in_buffer.data_left();
-
-	if (left < to_read + 1) {
-		in_buffer.advance_read(left);
-		return FAILED;
-	}
-
-	in_buffer.read(&is_string, 1);
-	_was_string = is_string == 1;
-	in_buffer.read(packet_buffer, to_read);
-	*r_buffer = packet_buffer;
-	r_buffer_size = to_read;
 
 	return OK;
 };
 
 int EMWSPeer::get_available_packet_count() const {
 
-	return queue_count;
+	return _in_buffer.packets_left();
 };
 
 bool EMWSPeer::was_string_packet() const {
 
-	return _was_string;
+	return _is_string;
 };
 
 bool EMWSPeer::is_connected_to_host() const {
@@ -143,9 +123,9 @@ void EMWSPeer::close(int p_code, String p_reason) {
 		}, peer_sock, p_code, p_reason.utf8().get_data());
 		/* clang-format on */
 	}
+	_is_string = 0;
+	_in_buffer.clear();
 	peer_sock = -1;
-	queue_count = 0;
-	in_buffer.clear();
 };
 
 IP_Address EMWSPeer::get_connected_host() const {
@@ -162,15 +142,12 @@ uint16_t EMWSPeer::get_connected_port() const {
 
 EMWSPeer::EMWSPeer() {
 	peer_sock = -1;
-	queue_count = 0;
-	_was_string = false;
-	in_buffer.resize(16);
 	write_mode = WRITE_MODE_BINARY;
+	close();
 };
 
 EMWSPeer::~EMWSPeer() {
 
-	in_buffer.resize(0);
 	close();
 };
 

modules/websocket/emws_peer.h

@@ -36,6 +36,7 @@
 #include "core/io/packet_peer.h"
 #include "core/ring_buffer.h"
 #include "emscripten.h"
+#include "packet_buffer.h"
 #include "websocket_peer.h"
 
 class EMWSPeer : public WebSocketPeer {
@@ -43,25 +44,20 @@ class EMWSPeer : public WebSocketPeer {
 	GDCIIMPL(EMWSPeer, WebSocketPeer);
 
 private:
-	enum {
-		PACKET_BUFFER_SIZE = 65536 - 5 // 4 bytes for the size, 1 for for type
-	};
-
 	int peer_sock;
 	WriteMode write_mode;
 
-	uint8_t packet_buffer[PACKET_BUFFER_SIZE];
+	PoolVector<uint8_t> _packet_buffer;
-	RingBuffer<uint8_t> in_buffer;
+	PacketBuffer<uint8_t> _in_buffer;
-	int queue_count;
+	uint8_t _is_string;
-	bool _was_string;
 
 public:
-	void read_msg(uint8_t *p_data, uint32_t p_size, bool p_is_string);
+	Error read_msg(uint8_t *p_data, uint32_t p_size, bool p_is_string);
-	void set_sock(int sock);
+	void set_sock(int p_sock, unsigned int p_in_buf_size, unsigned int p_in_pkt_size);
 	virtual int get_available_packet_count() const;
 	virtual Error get_packet(const uint8_t **r_buffer, int &r_buffer_size);
 	virtual Error put_packet(const uint8_t *p_buffer, int p_buffer_size);
-	virtual int get_max_packet_size() const { return PACKET_BUFFER_SIZE; };
+	virtual int get_max_packet_size() const { return _packet_buffer.size(); };
 
 	virtual void close(int p_code = 1000, String p_reason = "");
 	virtual bool is_connected_to_host() const;
@@ -72,10 +68,6 @@ public:
 	virtual void set_write_mode(WriteMode p_mode);
 	virtual bool was_string_packet() const;
 
-	void set_wsi(struct lws *wsi);
-	Error read_wsi(void *in, size_t len);
-	Error write_wsi();
-
 	EMWSPeer();
 	~EMWSPeer();
 };

modules/websocket/emws_server.cpp

@@ -74,6 +74,10 @@ void EMWSServer::disconnect_peer(int p_peer_id, int p_code, String p_reason) {
 void EMWSServer::poll() {
 }
 
+int EMWSServer::get_max_packet_size() const {
+	return 0;
+}
+
 EMWSServer::EMWSServer() {
 }
 

modules/websocket/emws_server.h

@@ -49,6 +49,7 @@ public:
 	IP_Address get_peer_address(int p_peer_id) const;
 	int get_peer_port(int p_peer_id) const;
 	void disconnect_peer(int p_peer_id, int p_code = 1000, String p_reason = "");
+	int get_max_packet_size() const;
 	virtual void poll();
 	virtual PoolVector<String> get_protocols() const;
 

modules/websocket/lws_client.cpp

@@ -32,6 +32,7 @@
 #include "lws_client.h"
 #include "core/io/ip.h"
 #include "core/io/stream_peer_ssl.h"
+#include "core/project_settings.h"
 #include "tls/mbedtls/wrapper/include/openssl/ssl.h"
 
 Error LWSClient::connect_to_host(String p_host, String p_path, uint16_t p_port, bool p_ssl, PoolVector<String> p_protocols) {
@@ -104,6 +105,10 @@ Error LWSClient::connect_to_host(String p_host, String p_path, uint16_t p_port,
 	return OK;
 };
 
+int LWSClient::get_max_packet_size() const {
+	return (1 << _out_buf_size) - PROTO_SIZE;
+}
+
 void LWSClient::poll() {
 
 	_lws_poll();
@@ -124,7 +129,7 @@ int LWSClient::_handle_cb(struct lws *wsi, enum lws_callback_reasons reason, voi
 		} break;
 
 		case LWS_CALLBACK_CLIENT_ESTABLISHED:
-			peer->set_wsi(wsi);
+			peer->set_wsi(wsi, _in_buf_size, _in_pkt_size, _out_buf_size, _out_pkt_size);
 			peer_data->peer_id = 0;
 			peer_data->force_close = false;
 			peer_data->clean_close = false;
@@ -207,6 +212,11 @@ uint16_t LWSClient::get_connected_port() const {
 };
 
 LWSClient::LWSClient() {
+	_in_buf_size = nearest_shift((int)GLOBAL_GET(WSC_IN_BUF) - 1) + 10;
+	_in_pkt_size = nearest_shift((int)GLOBAL_GET(WSC_IN_PKT) - 1);
+	_out_buf_size = nearest_shift((int)GLOBAL_GET(WSC_OUT_BUF) - 1) + 10;
+	_out_pkt_size = nearest_shift((int)GLOBAL_GET(WSC_OUT_PKT) - 1);
+
 	context = NULL;
 	_lws_ref = NULL;
 	_peer = Ref<LWSPeer>(memnew(LWSPeer));

modules/websocket/lws_client.h

@@ -43,8 +43,15 @@ class LWSClient : public WebSocketClient {
 
 	LWS_HELPER(LWSClient);
 
+private:
+	int _in_buf_size;
+	int _in_pkt_size;
+	int _out_buf_size;
+	int _out_pkt_size;
+
 public:
 	Error connect_to_host(String p_host, String p_path, uint16_t p_port, bool p_ssl, PoolVector<String> p_protocol = PoolVector<String>());
+	int get_max_packet_size() const;
 	Ref<WebSocketPeer> get_peer(int p_peer_id) const;
 	void disconnect_from_host(int p_code = 1000, String p_reason = "");
 	IP_Address get_connected_host() const;

modules/websocket/lws_peer.cpp

@@ -41,11 +41,12 @@
 
 #include "drivers/unix/net_socket_posix.h"
 
-void LWSPeer::set_wsi(struct lws *p_wsi) {
+void LWSPeer::set_wsi(struct lws *p_wsi, unsigned int p_in_buf_size, unsigned int p_in_pkt_size, unsigned int p_out_buf_size, unsigned int p_out_pkt_size) {
 	ERR_FAIL_COND(wsi != NULL);
 
-	rbw.resize(16);
+	_in_buffer.resize(p_in_pkt_size, p_in_buf_size);
-	rbr.resize(16);
+	_out_buffer.resize(p_out_pkt_size, p_out_buf_size);
+	_packet_buffer.resize((1 << MAX(p_in_buf_size, p_out_buf_size)) + LWS_PRE);
 	wsi = p_wsi;
 };
 
@@ -61,24 +62,29 @@ Error LWSPeer::read_wsi(void *in, size_t len) {
 
 	ERR_FAIL_COND_V(!is_connected_to_host(), FAILED);
 
-	uint32_t size = in_size;
+	if (lws_is_first_fragment(wsi))
-	uint8_t is_string = lws_frame_is_binary(wsi) ? 0 : 1;
+		_in_size = 0;
+	else if (_in_size == -1) // Trash this frame
+		return ERR_FILE_CORRUPT;
 
-	if (rbr.space_left() < len + 5) {
+	Error err = _in_buffer.write_packet((const uint8_t *)in, len, NULL);
-		ERR_EXPLAIN("Buffer full! Dropping data");
+
-		ERR_FAIL_V(FAILED);
+	if (err != OK) {
+		_in_buffer.discard_payload(_in_size);
+		_in_size = -1;
+		ERR_FAIL_V(err);
 	}
 
-	copymem(&(input_buffer[size]), in, len);
+	_in_size += len;
-	size += len;
 
-	in_size = size;
 	if (lws_is_final_fragment(wsi)) {
-		rbr.write((uint8_t *)&size, 4);
+		uint8_t is_string = lws_frame_is_binary(wsi) ? 0 : 1;
-		rbr.write((uint8_t *)&is_string, 1);
+		err = _in_buffer.write_packet(NULL, _in_size, &is_string);
-		rbr.write(input_buffer, size);
+		if (err != OK) {
-		in_count++;
+			_in_buffer.discard_payload(_in_size);
-		in_size = 0;
+			_in_size = -1;
+			ERR_FAIL_V(err);
+		}
 	}
 
 	return OK;
@@ -89,26 +95,20 @@ Error LWSPeer::write_wsi() {
 	ERR_FAIL_COND_V(!is_connected_to_host(), FAILED);
 
 	PoolVector<uint8_t> tmp;
-	int left = rbw.data_left();
+	int count = _out_buffer.packets_left();
-	uint32_t to_write = 0;
 
-	if (left == 0 || out_count == 0)
+	if (count == 0)
 		return OK;
 
-	rbw.read((uint8_t *)&to_write, 4);
+	int read = 0;
-	out_count--;
+	uint8_t is_string;
+	PoolVector<uint8_t>::Write rw = _packet_buffer.write();
+	_out_buffer.read_packet(&(rw[LWS_PRE]), _packet_buffer.size() - LWS_PRE, &is_string, read);
 
-	if (left < to_write) {
+	enum lws_write_protocol mode = is_string ? LWS_WRITE_TEXT : LWS_WRITE_BINARY;
-		rbw.advance_read(left);
+	lws_write(wsi, &(rw[LWS_PRE]), read, mode);
-		return FAILED;
-	}
 
-	tmp.resize(LWS_PRE + to_write);
+	if (count > 1)
-	rbw.read(&(tmp.write()[LWS_PRE]), to_write);
-	lws_write(wsi, &(tmp.write()[LWS_PRE]), to_write, (enum lws_write_protocol)write_mode);
-	tmp.resize(0);
-
-	if (out_count > 0)
 		lws_callback_on_writable(wsi); // we want to write more!
 
 	return OK;
@@ -118,40 +118,27 @@ Error LWSPeer::put_packet(const uint8_t *p_buffer, int p_buffer_size) {
 
 	ERR_FAIL_COND_V(!is_connected_to_host(), FAILED);
 
-	rbw.write((uint8_t *)&p_buffer_size, 4);
+	uint8_t is_string = write_mode == WRITE_MODE_TEXT;
-	rbw.write(p_buffer, MIN(p_buffer_size, rbw.space_left()));
+	_out_buffer.write_packet(p_buffer, p_buffer_size, &is_string);
-	out_count++;
-
 	lws_callback_on_writable(wsi); // notify that we want to write
 	return OK;
 };
 
 Error LWSPeer::get_packet(const uint8_t **r_buffer, int &r_buffer_size) {
 
-	ERR_FAIL_COND_V(!is_connected_to_host(), FAILED);
-
-	if (in_count == 0)
-		return ERR_UNAVAILABLE;
-
-	uint32_t to_read = 0;
-	uint32_t left = 0;
-	uint8_t is_string = 0;
 	r_buffer_size = 0;
 
-	rbr.read((uint8_t *)&to_read, 4);
+	ERR_FAIL_COND_V(!is_connected_to_host(), FAILED);
-	in_count--;
-	left = rbr.data_left();
 
-	if (left < to_read + 1) {
+	if (_in_buffer.packets_left() == 0)
-		rbr.advance_read(left);
+		return ERR_UNAVAILABLE;
-		return FAILED;
-	}
 
-	rbr.read(&is_string, 1);
+	int read = 0;
-	rbr.read(packet_buffer, to_read);
+	PoolVector<uint8_t>::Write rw = _packet_buffer.write();
-	*r_buffer = packet_buffer;
+	_in_buffer.read_packet(rw.ptr(), _packet_buffer.size(), &_is_string, read);
-	r_buffer_size = to_read;
+
-	_was_string = is_string;
+	*r_buffer = rw.ptr();
+	r_buffer_size = read;
 
 	return OK;
 };
@@ -161,12 +148,12 @@ int LWSPeer::get_available_packet_count() const {
 	if (!is_connected_to_host())
 		return 0;
 
-	return in_count;
+	return _in_buffer.packets_left();
 };
 
 bool LWSPeer::was_string_packet() const {
 
-	return _was_string;
+	return _is_string;
 };
 
 bool LWSPeer::is_connected_to_host() const {
@@ -219,12 +206,11 @@ void LWSPeer::close(int p_code, String p_reason) {
 		close_reason = "";
 	}
 	wsi = NULL;
-	rbw.resize(0);
+	_in_buffer.clear();
-	rbr.resize(0);
+	_out_buffer.clear();
-	in_count = 0;
+	_in_size = 0;
-	in_size = 0;
+	_is_string = 0;
-	out_count = 0;
+	_packet_buffer.resize(0);
-	_was_string = false;
 };
 
 IP_Address LWSPeer::get_connected_host() const {

modules/websocket/lws_peer.h

@@ -37,6 +37,7 @@
 #include "core/ring_buffer.h"
 #include "libwebsockets.h"
 #include "lws_config.h"
+#include "packet_buffer.h"
 #include "websocket_peer.h"
 
 class LWSPeer : public WebSocketPeer {
@@ -44,14 +45,16 @@ class LWSPeer : public WebSocketPeer {
 	GDCIIMPL(LWSPeer, WebSocketPeer);
 
 private:
-	enum {
+	int _in_size;
-		PACKET_BUFFER_SIZE = 65536 - 5 // 4 bytes for the size, 1 for the type
+	uint8_t _is_string;
-	};
+	// Our packet info is just a boolean (is_string), using uint8_t for it.
+	PacketBuffer<uint8_t> _in_buffer;
+	PacketBuffer<uint8_t> _out_buffer;
+
+	PoolVector<uint8_t> _packet_buffer;
 
-	uint8_t packet_buffer[PACKET_BUFFER_SIZE];
 	struct lws *wsi;
 	WriteMode write_mode;
-	bool _was_string;
 
 	int close_code;
 	String close_reason;
@@ -63,17 +66,10 @@ public:
 		bool clean_close;
 	};
 
-	RingBuffer<uint8_t> rbw;
-	RingBuffer<uint8_t> rbr;
-	uint8_t input_buffer[PACKET_BUFFER_SIZE];
-	uint32_t in_size;
-	int in_count;
-	int out_count;
-
 	virtual int get_available_packet_count() const;
 	virtual Error get_packet(const uint8_t **r_buffer, int &r_buffer_size);
 	virtual Error put_packet(const uint8_t *p_buffer, int p_buffer_size);
-	virtual int get_max_packet_size() const { return PACKET_BUFFER_SIZE; };
+	virtual int get_max_packet_size() const { return _packet_buffer.size(); };
 
 	virtual void close(int p_code = 1000, String p_reason = "");
 	virtual bool is_connected_to_host() const;
@@ -84,7 +80,7 @@ public:
 	virtual void set_write_mode(WriteMode p_mode);
 	virtual bool was_string_packet() const;
 
-	void set_wsi(struct lws *wsi);
+	void set_wsi(struct lws *wsi, unsigned int _in_buf_size, unsigned int _in_pkt_size, unsigned int _out_buf_size, unsigned int _out_pkt_size);
 	Error read_wsi(void *in, size_t len);
 	Error write_wsi();
 	void send_close_status(struct lws *wsi);

modules/websocket/lws_server.cpp

@@ -31,6 +31,7 @@
 
 #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) {
 
@@ -67,6 +68,10 @@ 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;
@@ -85,7 +90,7 @@ int LWSServer::_handle_cb(struct lws *wsi, enum lws_callback_reasons reason, voi
 			int32_t id = _gen_unique_id();
 
 			Ref<LWSPeer> peer = Ref<LWSPeer>(memnew(LWSPeer));
-			peer->set_wsi(wsi);
+			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;
@@ -192,6 +197,10 @@ void LWSServer::disconnect_peer(int p_peer_id, int p_code, String p_reason) {
 }
 
 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;
 }

modules/websocket/lws_server.h

@@ -45,11 +45,16 @@ class LWSServer : public WebSocketServer {
 
 private:
 	Map<int, Ref<LWSPeer> > peer_map;
+	int _in_buf_size;
+	int _in_pkt_size;
+	int _out_buf_size;
+	int _out_pkt_size;
 
 public:
 	Error listen(int p_port, PoolVector<String> p_protocols = PoolVector<String>(), bool gd_mp_api = false);
 	void stop();
 	bool is_listening() const;
+	int get_max_packet_size() const;
 	bool has_peer(int p_id) const;
 	Ref<WebSocketPeer> get_peer(int p_id) const;
 	IP_Address get_peer_address(int p_peer_id) const;

modules/websocket/packet_buffer.h

@@ -0,0 +1,122 @@
+/*************************************************************************/
+/*  packet_buffer.h                                                      */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2018 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 PACKET_BUFFER_H
+#define PACKET_BUFFER_H
+
+#include "core/os/copymem.h"
+#include "core/ring_buffer.h"
+
+template <class T>
+class PacketBuffer {
+
+private:
+	typedef struct {
+		uint32_t size;
+		T info;
+	} _Packet;
+
+	RingBuffer<_Packet> _packets;
+	RingBuffer<uint8_t> _payload;
+
+public:
+	Error write_packet(const uint8_t *p_payload, uint32_t p_size, const T *p_info) {
+#ifdef TOOLS_ENABLED
+		// Verbose buffer warnings
+		if (p_payload && _payload.space_left() < p_size) {
+			ERR_PRINT("Buffer payload full! Dropping data.");
+			ERR_FAIL_V(ERR_OUT_OF_MEMORY);
+		}
+		if (p_info && _packets.space_left() < 1) {
+			ERR_PRINT("Too many packets in queue! Dropping data.");
+			ERR_FAIL_V(ERR_OUT_OF_MEMORY);
+		}
+#else
+		ERR_FAIL_COND_V(p_payload && _payload.space_left() < p_size, ERR_OUT_OF_MEMORY);
+		ERR_FAIL_COND_V(p_info && _packets.space_left() < 1, ERR_OUT_OF_MEMORY);
+#endif
+
+		// If p_info is NULL, only the payload is written
+		if (p_info) {
+			_Packet p;
+			p.size = p_size;
+			copymem(&p.info, p_info, sizeof(T));
+			_packets.write(p);
+		}
+
+		// If p_payload is NULL, only the packet information is written.
+		if (p_payload) {
+			_payload.write((const uint8_t *)p_payload, p_size);
+		}
+
+		return OK;
+	}
+
+	Error read_packet(uint8_t *r_payload, int p_bytes, T *r_info, int &r_read) {
+		ERR_FAIL_COND_V(_packets.data_left() < 1, ERR_UNAVAILABLE);
+		_Packet p;
+		_packets.read(&p, 1);
+		ERR_FAIL_COND_V(_payload.data_left() < p.size, ERR_BUG);
+		ERR_FAIL_COND_V(p_bytes < p.size, ERR_OUT_OF_MEMORY);
+
+		r_read = p.size;
+		copymem(r_info, &p.info, sizeof(T));
+		_payload.read(r_payload, p.size);
+		return OK;
+	}
+
+	void discard_payload(int p_size) {
+		_packets.decrease_write(p_size);
+	}
+
+	void resize(int p_pkt_shift, int p_buf_shift) {
+		_packets.resize(p_pkt_shift);
+		_payload.resize(p_buf_shift);
+	}
+
+	int packets_left() const {
+		return _packets.data_left();
+	}
+
+	void clear() {
+		_payload.resize(0);
+		_packets.resize(0);
+	}
+
+	PacketBuffer() {
+		clear();
+	}
+
+	~PacketBuffer() {
+		clear();
+	}
+};
+
+#endif // PACKET_BUFFER_H

modules/websocket/register_types.cpp

@@ -29,6 +29,7 @@
 /*************************************************************************/
 #include "register_types.h"
 #include "core/error_macros.h"
+#include "core/project_settings.h"
 #ifdef JAVASCRIPT_ENABLED
 #include "emscripten.h"
 #include "emws_client.h"
@@ -41,6 +42,22 @@
 #endif
 
 void register_websocket_types() {
+#define _SET_HINT(NAME, _VAL_, _MAX_) \
+	GLOBAL_DEF(NAME, _VAL_);          \
+	ProjectSettings::get_singleton()->set_custom_property_info(NAME, PropertyInfo(Variant::INT, NAME, PROPERTY_HINT_RANGE, "2," #_MAX_ ",1,or_greater"));
+
+	// Client buffers project settings
+	_SET_HINT(WSC_IN_BUF, 64, 4096);
+	_SET_HINT(WSC_IN_PKT, 1024, 16384);
+	_SET_HINT(WSC_OUT_BUF, 64, 4096);
+	_SET_HINT(WSC_OUT_PKT, 1024, 16384);
+
+	// Server buffers project settings
+	_SET_HINT(WSS_IN_BUF, 64, 4096);
+	_SET_HINT(WSS_IN_PKT, 1024, 16384);
+	_SET_HINT(WSS_OUT_BUF, 64, 4096);
+	_SET_HINT(WSS_OUT_PKT, 1024, 16384);
+
 #ifdef JAVASCRIPT_ENABLED
 	EM_ASM({
 		var IDHandler = {};

modules/websocket/websocket_macros.h

@@ -30,6 +30,16 @@
 #ifndef WEBSOCKETMACTOS_H
 #define WEBSOCKETMACTOS_H
 
+#define WSC_IN_BUF "network/limits/websocket_client/max_in_buffer_kb"
+#define WSC_IN_PKT "network/limits/websocket_client/max_in_packets"
+#define WSC_OUT_BUF "network/limits/websocket_client/max_out_buffer_kb"
+#define WSC_OUT_PKT "network/limits/websocket_client/max_out_packets"
+
+#define WSS_IN_BUF "network/limits/websocket_server/max_in_buffer_kb"
+#define WSS_IN_PKT "network/limits/websocket_server/max_in_packets"
+#define WSS_OUT_BUF "network/limits/websocket_server/max_out_buffer_kb"
+#define WSS_OUT_PKT "network/limits/websocket_server/max_out_packets"
+
 /* clang-format off */
 #define GDCICLASS(CNAME) \
 public:\

modules/websocket/websocket_multiplayer.cpp

@@ -100,13 +100,6 @@ int WebSocketMultiplayerPeer::get_available_packet_count() const {
 	return _incoming_packets.size();
 }
 
-int WebSocketMultiplayerPeer::get_max_packet_size() const {
-
-	ERR_FAIL_COND_V(!_is_multiplayer, ERR_UNCONFIGURED);
-
-	return MAX_PACKET_SIZE;
-}
-
 Error WebSocketMultiplayerPeer::get_packet(const uint8_t **r_buffer, int &r_buffer_size) {
 
 	r_buffer_size = 0;

modules/websocket/websocket_multiplayer.h

@@ -51,9 +51,7 @@ protected:
 		SYS_DEL = 2,
 		SYS_ID = 3,
 
-		PROTO_SIZE = 9,
+		PROTO_SIZE = 9
-		SYS_PACKET_SIZE = 13,
-		MAX_PACKET_SIZE = 65536 - 14 // 5 websocket, 9 multiplayer
 	};
 
 	struct Packet {
@@ -93,7 +91,7 @@ public:
 
 	/* PacketPeer */
 	virtual int get_available_packet_count() const;
-	virtual int get_max_packet_size() const;
+	virtual int get_max_packet_size() const = 0;
 	virtual Error get_packet(const uint8_t **r_buffer, int &r_buffer_size);
 	virtual Error put_packet(const uint8_t *p_buffer, int p_buffer_size);
 

modules/websocket/websocket_peer.h

@@ -32,7 +32,6 @@
 
 #include "core/error_list.h"
 #include "core/io/packet_peer.h"
-#include "core/ring_buffer.h"
 #include "websocket_macros.h"
 
 class WebSocketPeer : public PacketPeer {