1 files changed, 117 insertions, 0 deletions
diff --git a/src/core/internal_network/network.h b/src/core/internal_network/network.h
new file mode 100644
index 000000000..10e5ef10d
--- /dev/null
+++ b/src/core/internal_network/network.h
@@ -0,0 +1,117 @@
+// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+#include <optional>
+
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+
+#ifdef _WIN32
+#include <winsock2.h>
+#elif YUZU_UNIX
+#include <netinet/in.h>
+#endif
+
+namespace Network {
+
+class Socket;
+
+/// Error code for network functions
+enum class Errno {
+    SUCCESS,
+    BADF,
+    INVAL,
+    MFILE,
+    NOTCONN,
+    AGAIN,
+    CONNREFUSED,
+    HOSTUNREACH,
+    NETDOWN,
+    NETUNREACH,
+    OTHER,
+};
+
+/// Address families
+enum class Domain {
+    INET, ///< Address family for IPv4
+};
+
+/// Socket types
+enum class Type {
+    STREAM,
+    DGRAM,
+    RAW,
+    SEQPACKET,
+};
+
+/// Protocol values for sockets
+enum class Protocol {
+    ICMP,
+    TCP,
+    UDP,
+};
+
+/// Shutdown mode
+enum class ShutdownHow {
+    RD,
+    WR,
+    RDWR,
+};
+
+/// Array of IPv4 address
+using IPv4Address = std::array<u8, 4>;
+
+/// Cross-platform sockaddr structure
+struct SockAddrIn {
+    Domain family;
+    IPv4Address ip;
+    u16 portno;
+};
+
+/// Cross-platform poll fd structure
+
+enum class PollEvents : u16 {
+    // Using Pascal case because IN is a macro on Windows.
+    In = 1 << 0,
+    Pri = 1 << 1,
+    Out = 1 << 2,
+    Err = 1 << 3,
+    Hup = 1 << 4,
+    Nval = 1 << 5,
+};
+
+DECLARE_ENUM_FLAG_OPERATORS(PollEvents);
+
+struct PollFD {
+    Socket* socket;
+    PollEvents events;
+    PollEvents revents;
+};
+
+class NetworkInstance {
+public:
+    explicit NetworkInstance();
+    ~NetworkInstance();
+};
+
+#ifdef _WIN32
+constexpr IPv4Address TranslateIPv4(in_addr addr) {
+    auto& bytes = addr.S_un.S_un_b;
+    return IPv4Address{bytes.s_b1, bytes.s_b2, bytes.s_b3, bytes.s_b4};
+}
+#elif YUZU_UNIX
+constexpr IPv4Address TranslateIPv4(in_addr addr) {
+    const u32 bytes = addr.s_addr;
+    return IPv4Address{static_cast<u8>(bytes), static_cast<u8>(bytes >> 8),
+                       static_cast<u8>(bytes >> 16), static_cast<u8>(bytes >> 24)};
+}
+#endif
+
+/// @brief Returns host's IPv4 address
+/// @return human ordered IPv4 address (e.g. 192.168.0.1) as an array
+std::optional<IPv4Address> GetHostIPv4Address();
+
+} // namespace Network