Kernel: Start work on network stack

kernel/include/kernel/Networking/NetworkManager.h

@@ -0,0 +1,39 @@
+#pragma once
+
+#include <BAN/Vector.h>
+#include <kernel/FS/TmpFS/FileSystem.h>
+#include <kernel/Networking/NetworkInterface.h>
+#include <kernel/Networking/NetworkSocket.h>
+#include <kernel/PCI.h>
+
+namespace Kernel
+{
+
+	class NetworkManager : public TmpFileSystem
+	{
+	public:
+		enum class SocketType
+		{
+			STREAM,
+			DGRAM,
+			SEQPACKET,
+		};
+
+	public:
+		static BAN::ErrorOr<void> initialize();
+		static NetworkManager& get();
+
+		BAN::ErrorOr<void> add_interface(PCI::Device& pci_device);
+		BAN::ErrorOr<void> bind_socket(int port, BAN::RefPtr<NetworkSocket>);
+
+		BAN::ErrorOr<BAN::RefPtr<NetworkSocket>> create_socket(SocketType, mode_t, uid_t, gid_t);
+
+	private:
+		NetworkManager();
+
+	private:
+		BAN::Vector<BAN::RefPtr<NetworkInterface>>		m_interfaces;
+		BAN::HashMap<int, BAN::RefPtr<NetworkSocket>>	m_bound_sockets;
+	};
+
+}

kernel/include/kernel/Networking/NetworkSocket.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <kernel/FS/TmpFS/Inode.h>
+#include <kernel/Networking/NetworkInterface.h>
+
+namespace Kernel
+{
+
+	class NetworkSocket : public TmpInode
+	{
+	public:
+		void bind_interface(NetworkInterface*);
+
+	protected:
+		NetworkSocket(mode_t mode, uid_t uid, gid_t gid);
+
+	protected:
+		NetworkInterface* m_interface = nullptr;
+	};
+
+}

kernel/include/kernel/Networking/UDPSocket.h

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <kernel/Networking/NetworkInterface.h>
+#include <kernel/Networking/NetworkSocket.h>
+
+namespace Kernel
+{
+
+	class UDPSocket final : public NetworkSocket
+	{
+	public:
+		static BAN::ErrorOr<BAN::RefPtr<UDPSocket>> create(mode_t, uid_t, gid_t);
+
+		void bind_interface(NetworkInterface*);
+
+	protected:
+		virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override;
+		virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan) override;
+
+	private:
+		UDPSocket(mode_t, uid_t, gid_t);
+
+	private:
+		NetworkInterface* m_interface = nullptr;
+
+		friend class BAN::RefPtr<UDPSocket>;
+	};
+
+}