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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/AtomicRefCounted.h>
#include <AK/ByteBuffer.h>
#include <AK/Function.h>
#include <AK/IntrusiveList.h>
#include <AK/MACAddress.h>
#include <AK/Types.h>
#include <Kernel/Bus/PCI/Definitions.h>
#include <Kernel/KBuffer.h>
#include <Kernel/Library/LockWeakPtr.h>
#include <Kernel/Library/LockWeakable.h>
#include <Kernel/Net/ARP.h>
#include <Kernel/Net/EthernetFrameHeader.h>
#include <Kernel/Net/ICMP.h>
#include <Kernel/Net/IPv4.h>
#include <Kernel/UserOrKernelBuffer.h>
namespace Kernel {
class NetworkAdapter;
using NetworkByteBuffer = AK::Detail::ByteBuffer<1500>;
struct PacketWithTimestamp final : public AtomicRefCounted<PacketWithTimestamp> {
PacketWithTimestamp(NonnullOwnPtr<KBuffer> buffer, Time timestamp)
: buffer(move(buffer))
, timestamp(timestamp)
{
}
ReadonlyBytes bytes() { return buffer->bytes(); }
NonnullOwnPtr<KBuffer> buffer;
Time timestamp;
IntrusiveListNode<PacketWithTimestamp, LockRefPtr<PacketWithTimestamp>> packet_node;
};
class NetworkingManagement;
class NetworkAdapter
: public AtomicRefCounted<NetworkAdapter>
, public LockWeakable<NetworkAdapter> {
public:
enum class Type {
Loopback,
Ethernet
};
static constexpr i32 LINKSPEED_INVALID = -1;
virtual ~NetworkAdapter();
virtual StringView class_name() const = 0;
virtual Type adapter_type() const = 0;
virtual ErrorOr<void> initialize(Badge<NetworkingManagement>) = 0;
StringView name() const { return m_name->view(); }
MACAddress mac_address() { return m_mac_address; }
IPv4Address ipv4_address() const { return m_ipv4_address; }
IPv4Address ipv4_netmask() const { return m_ipv4_netmask; }
IPv4Address ipv4_broadcast() const { return IPv4Address { (m_ipv4_address.to_u32() & m_ipv4_netmask.to_u32()) | ~m_ipv4_netmask.to_u32() }; }
virtual bool link_up() { return false; }
virtual i32 link_speed()
{
// In Mbit/sec.
return LINKSPEED_INVALID;
}
virtual bool link_full_duplex() { return false; }
void set_ipv4_address(IPv4Address const&);
void set_ipv4_netmask(IPv4Address const&);
void send(MACAddress const&, ARPPacket const&);
void fill_in_ipv4_header(PacketWithTimestamp&, IPv4Address const&, MACAddress const&, IPv4Address const&, IPv4Protocol, size_t, u8 type_of_service, u8 ttl);
size_t dequeue_packet(u8* buffer, size_t buffer_size, Time& packet_timestamp);
bool has_queued_packets() const { return !m_packet_queue.is_empty(); }
u32 mtu() const { return m_mtu; }
void set_mtu(u32 mtu) { m_mtu = mtu; }
u32 packets_in() const { return m_packets_in; }
u32 bytes_in() const { return m_bytes_in; }
u32 packets_out() const { return m_packets_out; }
u32 bytes_out() const { return m_bytes_out; }
LockRefPtr<PacketWithTimestamp> acquire_packet_buffer(size_t);
void release_packet_buffer(PacketWithTimestamp&);
constexpr size_t layer3_payload_offset() const { return sizeof(EthernetFrameHeader); }
constexpr size_t ipv4_payload_offset() const { return layer3_payload_offset() + sizeof(IPv4Packet); }
Function<void()> on_receive;
void send_packet(ReadonlyBytes);
protected:
NetworkAdapter(NonnullOwnPtr<KString>);
void set_mac_address(MACAddress const& mac_address) { m_mac_address = mac_address; }
void did_receive(ReadonlyBytes);
virtual void send_raw(ReadonlyBytes) = 0;
private:
MACAddress m_mac_address;
IPv4Address m_ipv4_address;
IPv4Address m_ipv4_netmask;
// FIXME: Make this configurable
static constexpr size_t max_packet_buffers = 1024;
using PacketList = IntrusiveList<&PacketWithTimestamp::packet_node>;
PacketList m_packet_queue;
size_t m_packet_queue_size { 0 };
SpinlockProtected<PacketList, LockRank::None> m_unused_packets {};
NonnullOwnPtr<KString> m_name;
u32 m_packets_in { 0 };
u32 m_bytes_in { 0 };
u32 m_packets_out { 0 };
u32 m_bytes_out { 0 };
u32 m_mtu { 1500 };
};
}
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