New NetSocket interface, BSD/Win implementation

Unified BSD and Winsock sockets into a single implementation of a
generic NetSocket interface.

This is some ground work for few network improvements:
- Reuse as much code as possible between Posix and Windows.
- Provide a single point of implementation for exotic sdks (consoles).
- Provide platform agnostic StreamPeerTCP and PacketPeerUDP in core.
- Implement connect for UDP allowing for DTLS implementation.

1 files changed, 79 insertions, 0 deletions

diff --git a/core/io/net_socket.h b/core/io/net_socket.h
new file mode 100644
index 0000000000..0665bec9fd
--- /dev/null
+++ b/core/io/net_socket.h
@@ -0,0 +1,79 @@
+/*************************************************************************/
+/*  net_socket.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 NET_SOCKET_H
+#define NET_SOCKET_H
+
+#include "core/io/ip.h"
+#include "core/reference.h"
+
+class NetSocket : public Reference {
+
+protected:
+	static NetSocket *(*_create)();
+
+public:
+	static NetSocket *create();
+
+	enum PollType {
+		POLL_TYPE_IN,
+		POLL_TYPE_OUT,
+		POLL_TYPE_IN_OUT
+	};
+
+	enum Type {
+		TYPE_NONE,
+		TYPE_TCP,
+		TYPE_UDP,
+	};
+
+	virtual Error open(Type p_type, IP::Type &ip_type) = 0;
+	virtual void close() = 0;
+	virtual Error bind(IP_Address p_addr, uint16_t p_port) = 0;
+	virtual Error listen(int p_max_pending) = 0;
+	virtual Error connect_to_host(IP_Address p_addr, uint16_t p_port) = 0;
+	virtual Error poll(PollType p_type, int timeout) const = 0;
+	virtual Error recv(uint8_t *p_buffer, int p_len, int &r_read) = 0;
+	virtual Error recvfrom(uint8_t *p_buffer, int p_len, int &r_read, IP_Address &r_ip, uint16_t &r_port) = 0;
+	virtual Error send(const uint8_t *p_buffer, int p_len, int &r_sent) = 0;
+	virtual Error sendto(const uint8_t *p_buffer, int p_len, int &r_sent, IP_Address p_ip, uint16_t p_port) = 0;
+	virtual Ref<NetSocket> accept(IP_Address &r_ip, uint16_t &r_port) = 0;
+
+	virtual bool is_open() const = 0;
+	virtual int get_available_bytes() const = 0;
+
+	virtual void set_broadcasting_enabled(bool p_enabled) = 0;
+	virtual void set_blocking_enabled(bool p_enabled) = 0;
+	virtual void set_ipv6_only_enabled(bool p_enabled) = 0;
+	virtual void set_tcp_no_delay_enabled(bool p_enabled) = 0;
+	virtual void set_reuse_address_enabled(bool p_enabled) = 0;
+};
+
+#endif // NET_SOCKET_H