Network cleanup (#6302)

* Cleanup network headers

* Move peerhandler to a specific header to reduce compilation times
* Move socket.cpp/h to network folder

* More work

* Network code cleanups

* Move socket.{cpp,h} to network folder
* Move Address object to network/address.{cpp,h}
* Move network exceptions to network/networkexceptions.h
* Client: use unique_ptr for Connection
* Server/ClientIface: use shared_ptr for Connection

* Format fixes

* Remove socket.cpp socket.h from clang-format whitelist

* Also fix NetworkPacket code style & make it under clang-format

1 files changed, 70 insertions, 0 deletions

diff --git a/src/network/socket.h b/src/network/socket.h
new file mode 100644
index 000000000..e0e76f4c2
--- /dev/null
+++ b/src/network/socket.h
@@ -0,0 +1,70 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#pragma once
+
+#ifdef _WIN32
+#ifndef _WIN32_WINNT
+#define _WIN32_WINNT 0x0501
+#endif
+#include <windows.h>
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#else
+#include <sys/socket.h>
+#include <netinet/in.h>
+#endif
+
+#include <ostream>
+#include <cstring>
+#include "address.h"
+#include "irrlichttypes.h"
+#include "networkexceptions.h"
+
+extern bool socket_enable_debug_output;
+
+void sockets_init();
+void sockets_cleanup();
+
+class UDPSocket
+{
+public:
+	UDPSocket() = default;
+
+	UDPSocket(bool ipv6);
+	~UDPSocket();
+	void Bind(Address addr);
+
+	bool init(bool ipv6, bool noExceptions = false);
+
+	// void Close();
+	// bool IsOpen();
+	void Send(const Address &destination, const void *data, int size);
+	// Returns -1 if there is no data
+	int Receive(Address &sender, void *data, int size);
+	int GetHandle(); // For debugging purposes only
+	void setTimeoutMs(int timeout_ms);
+	// Returns true if there is data, false if timeout occurred
+	bool WaitData(int timeout_ms);
+
+private:
+	int m_handle;
+	int m_timeout_ms;
+	int m_addr_family;
+};