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

Kernel/Net/NetworkAdapter.h

@@ -0,0 +1,54 @@
+#pragma once
+
+#include <AK/ByteBuffer.h>
+#include <AK/SinglyLinkedList.h>
+#include <AK/Types.h>
+#include <Kernel/Net/MACAddress.h>
+#include <Kernel/Net/IPv4.h>
+#include <Kernel/Net/ARP.h>
+#include <Kernel/Net/ICMP.h>
+#include <Kernel/Alarm.h>
+
+class NetworkAdapter;
+
+class PacketQueueAlarm final : public Alarm {
+public:
+    PacketQueueAlarm(NetworkAdapter& adapter) : m_adapter(adapter) { }
+    virtual ~PacketQueueAlarm() override { }
+    virtual bool is_ringing() const override;
+private:
+    NetworkAdapter& m_adapter;
+};
+
+class NetworkAdapter {
+public:
+    static NetworkAdapter* from_ipv4_address(const IPv4Address&);
+    virtual ~NetworkAdapter();
+
+    virtual const char* class_name() const = 0;
+    MACAddress mac_address() { return m_mac_address; }
+    IPv4Address ipv4_address() const { return m_ipv4_address; }
+
+    void set_ipv4_address(const IPv4Address&);
+
+    void send(const MACAddress&, const ARPPacket&);
+    void send_ipv4(const MACAddress&, const IPv4Address&, IPv4Protocol, ByteBuffer&& payload);
+
+    ByteBuffer dequeue_packet();
+
+    Alarm& packet_queue_alarm() { return m_packet_queue_alarm; }
+
+    bool has_queued_packets() const { return !m_packet_queue.is_empty(); }
+
+protected:
+    NetworkAdapter();
+    void set_mac_address(const MACAddress& mac_address) { m_mac_address = mac_address; }
+    virtual void send_raw(const byte*, int) = 0;
+    void did_receive(const byte*, int);
+
+private:
+    MACAddress m_mac_address;
+    IPv4Address m_ipv4_address;
+    PacketQueueAlarm m_packet_queue_alarm;
+    SinglyLinkedList<ByteBuffer> m_packet_queue;
+};