From 51817f6e59e420536901e3225091894ea6ad1b25 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Sat, 11 Jul 2020 21:42:56 -0300
Subject: core/network: Add network abstraction

This commit adds a network abstraction designed to implement bsd:s but
at the same time work as a generic abstraction to implement any
networking code we have to use from core.

This is implemented on top of BSD sockets on Unix systems and winsock on
Windows. The code is designed around winsocks having compatibility
definitions to support both BSD and Windows sockets.
---
 src/core/network/sockets.h | 94 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 src/core/network/sockets.h

(limited to 'src/core/network/sockets.h')

diff --git a/src/core/network/sockets.h b/src/core/network/sockets.h
new file mode 100644
index 000000000..7bdff0fe4
--- /dev/null
+++ b/src/core/network/sockets.h
@@ -0,0 +1,94 @@
+// Copyright 2020 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <utility>
+
+#if defined(_WIN32)
+#include <winsock.h>
+#elif !defined(__unix__)
+#error "Platform not implemented"
+#endif
+
+#include "common/common_types.h"
+#include "core/network/network.h"
+
+// TODO: C++20 Replace std::vector usages with std::span
+
+namespace Network {
+
+class Socket {
+public:
+    struct AcceptResult {
+        std::unique_ptr<Socket> socket;
+        SockAddrIn sockaddr_in;
+    };
+
+    explicit Socket() = default;
+    ~Socket();
+
+    Socket(const Socket&) = delete;
+    Socket& operator=(const Socket&) = delete;
+
+    Socket(Socket&& rhs) noexcept;
+
+    // Avoid closing sockets implicitly
+    Socket& operator=(Socket&&) noexcept = delete;
+
+    Errno Initialize(Domain domain, Type type, Protocol protocol);
+
+    Errno Close();
+
+    std::pair<AcceptResult, Errno> Accept();
+
+    Errno Connect(SockAddrIn addr_in);
+
+    std::pair<SockAddrIn, Errno> GetPeerName();
+
+    std::pair<SockAddrIn, Errno> GetSockName();
+
+    Errno Bind(SockAddrIn addr);
+
+    Errno Listen(s32 backlog);
+
+    Errno Shutdown(ShutdownHow how);
+
+    std::pair<s32, Errno> Recv(int flags, std::vector<u8>& message);
+
+    std::pair<s32, Errno> RecvFrom(int flags, std::vector<u8>& message, SockAddrIn* addr);
+
+    std::pair<s32, Errno> Send(const std::vector<u8>& message, int flags);
+
+    std::pair<s32, Errno> SendTo(u32 flags, const std::vector<u8>& message, const SockAddrIn* addr);
+
+    Errno SetLinger(bool enable, u32 linger);
+
+    Errno SetReuseAddr(bool enable);
+
+    Errno SetBroadcast(bool enable);
+
+    Errno SetSndBuf(u32 value);
+
+    Errno SetRcvBuf(u32 value);
+
+    Errno SetSndTimeo(u32 value);
+
+    Errno SetRcvTimeo(u32 value);
+
+    Errno SetNonBlock(bool enable);
+
+    bool IsOpened() const;
+
+#if defined(_WIN32)
+    SOCKET fd = INVALID_SOCKET;
+#elif defined(__unix__)
+    int fd = -1;
+#endif
+};
+
+std::pair<s32, Errno> Poll(std::vector<PollFD>& poll_fds, s32 timeout);
+
+} // namespace Network
-- 
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