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