Kernel: Move networking related files into Kernel/Net/.

Kernel/Net/IPv4Socket.h

@@ -0,0 +1,98 @@
+#pragma once
+
+#include <Kernel/Socket.h>
+#include <Kernel/DoubleBuffer.h>
+#include <Kernel/Net/IPv4.h>
+#include <AK/HashMap.h>
+#include <Kernel/Lock.h>
+#include <AK/SinglyLinkedList.h>
+
+class IPv4SocketHandle;
+class TCPSocketHandle;
+class NetworkAdapter;
+class TCPPacket;
+class TCPSocket;
+
+class IPv4Socket : public Socket {
+public:
+    static Retained<IPv4Socket> create(int type, int protocol);
+    virtual ~IPv4Socket() override;
+
+    static Lockable<HashTable<IPv4Socket*>>& all_sockets();
+
+    virtual KResult bind(const sockaddr*, socklen_t) override;
+    virtual KResult connect(const sockaddr*, socklen_t) override;
+    virtual bool get_address(sockaddr*, socklen_t*) override;
+    virtual void attach_fd(SocketRole) override;
+    virtual void detach_fd(SocketRole) override;
+    virtual bool can_read(SocketRole) const override;
+    virtual ssize_t read(SocketRole, byte*, ssize_t) override;
+    virtual ssize_t write(SocketRole, const byte*, ssize_t) override;
+    virtual bool can_write(SocketRole) const override;
+    virtual ssize_t sendto(const void*, size_t, int, const sockaddr*, socklen_t) override;
+    virtual ssize_t recvfrom(void*, size_t, int flags, sockaddr*, socklen_t*) override;
+
+    void did_receive(ByteBuffer&&);
+
+    const IPv4Address& source_address() const;
+    word source_port() const { return m_source_port; }
+    void set_source_port(word port) { m_source_port = port; }
+
+    const IPv4Address& destination_address() const { return m_destination_address; }
+    word destination_port() const { return m_destination_port; }
+    void set_destination_port(word port) { m_destination_port = port; }
+
+protected:
+    IPv4Socket(int type, int protocol);
+
+    int allocate_source_port_if_needed();
+
+    virtual int protocol_receive(const ByteBuffer&, void*, size_t, int, sockaddr*, socklen_t*) { return -ENOTIMPL; }
+    virtual int protocol_send(const void*, int) { return -ENOTIMPL; }
+    virtual KResult protocol_connect() { return KSuccess; }
+    virtual int protocol_allocate_source_port() { return 0; }
+    virtual bool protocol_is_disconnected() const { return false; }
+
+private:
+    virtual bool is_ipv4() const override { return true; }
+
+    bool m_bound { false };
+    int m_attached_fds { 0 };
+    IPv4Address m_destination_address;
+
+    DoubleBuffer m_for_client;
+    DoubleBuffer m_for_server;
+
+    SinglyLinkedList<ByteBuffer> m_receive_queue;
+
+    word m_source_port { 0 };
+    word m_destination_port { 0 };
+
+    dword m_bytes_received { 0 };
+
+    bool m_can_read { false };
+};
+
+class IPv4SocketHandle : public SocketHandle {
+public:
+    IPv4SocketHandle() { }
+
+    IPv4SocketHandle(RetainPtr<IPv4Socket>&& socket)
+        : SocketHandle(move(socket))
+    {
+    }
+
+    IPv4SocketHandle(IPv4SocketHandle&& other)
+        : SocketHandle(move(other))
+    {
+    }
+
+    IPv4SocketHandle(const IPv4SocketHandle&) = delete;
+    IPv4SocketHandle& operator=(const IPv4SocketHandle&) = delete;
+
+    IPv4Socket* operator->() { return &socket(); }
+    const IPv4Socket* operator->() const { return &socket(); }
+
+    IPv4Socket& socket() { return static_cast<IPv4Socket&>(SocketHandle::socket()); }
+    const IPv4Socket& socket() const { return static_cast<const IPv4Socket&>(SocketHandle::socket()); }
+};