mirror of
https://github.com/SerenityOS/serenity
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2770433d30
Another step of incremental progress of removing `AK::String` from the kernel, to harden against OOM.
120 lines
4.1 KiB
C++
120 lines
4.1 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Singleton.h>
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#include <Kernel/Arch/x86/IO.h>
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#include <Kernel/Bus/PCI/API.h>
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#include <Kernel/CommandLine.h>
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#include <Kernel/KString.h>
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#include <Kernel/Memory/AnonymousVMObject.h>
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#include <Kernel/Multiboot.h>
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#include <Kernel/Net/E1000ENetworkAdapter.h>
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#include <Kernel/Net/E1000NetworkAdapter.h>
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#include <Kernel/Net/LoopbackAdapter.h>
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#include <Kernel/Net/NE2000NetworkAdapter.h>
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#include <Kernel/Net/NetworkingManagement.h>
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#include <Kernel/Net/RTL8139NetworkAdapter.h>
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#include <Kernel/Net/RTL8168NetworkAdapter.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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static Singleton<NetworkingManagement> s_the;
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NetworkingManagement& NetworkingManagement::the()
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{
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return *s_the;
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}
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bool NetworkingManagement::is_initialized()
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{
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return s_the.is_initialized();
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}
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UNMAP_AFTER_INIT NetworkingManagement::NetworkingManagement()
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{
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}
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NonnullRefPtr<NetworkAdapter> NetworkingManagement::loopback_adapter() const
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{
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return *m_loopback_adapter;
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}
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void NetworkingManagement::for_each(Function<void(NetworkAdapter&)> callback)
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{
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MutexLocker locker(m_lock);
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for (auto& it : m_adapters)
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callback(it);
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}
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RefPtr<NetworkAdapter> NetworkingManagement::from_ipv4_address(const IPv4Address& address) const
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{
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MutexLocker locker(m_lock);
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for (auto& adapter : m_adapters) {
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if (adapter.ipv4_address() == address || adapter.ipv4_broadcast() == address)
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return adapter;
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}
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if (address[0] == 0 && address[1] == 0 && address[2] == 0 && address[3] == 0)
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return m_loopback_adapter;
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if (address[0] == 127)
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return m_loopback_adapter;
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return {};
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}
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RefPtr<NetworkAdapter> NetworkingManagement::lookup_by_name(const StringView& name) const
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{
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MutexLocker locker(m_lock);
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RefPtr<NetworkAdapter> found_adapter;
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for (auto& it : m_adapters) {
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if (it.name() == name)
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found_adapter = it;
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}
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return found_adapter;
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}
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UNMAP_AFTER_INIT RefPtr<NetworkAdapter> NetworkingManagement::determine_network_device(PCI::DeviceIdentifier const& device_identifier) const
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{
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// Note: This stands for e - "Ethernet", p - "Port" as for PCI bus, "s" for slot as for PCI slot
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auto name = String::formatted("ep{}s{}", device_identifier.address().bus(), device_identifier.address().device());
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VERIFY(!NetworkingManagement::the().lookup_by_name(name));
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// TODO: We need some way to to format data into a `KString`.
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auto interface_name_or_error = KString::try_create(name.view());
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if (interface_name_or_error.is_error())
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return {};
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auto interface_name = interface_name_or_error.release_value();
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if (auto candidate = E1000NetworkAdapter::try_to_initialize(device_identifier, move(interface_name)); !candidate.is_null())
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return candidate;
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if (auto candidate = E1000ENetworkAdapter::try_to_initialize(device_identifier, move(interface_name)); !candidate.is_null())
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return candidate;
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if (auto candidate = RTL8139NetworkAdapter::try_to_initialize(device_identifier, move(interface_name)); !candidate.is_null())
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return candidate;
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if (auto candidate = RTL8168NetworkAdapter::try_to_initialize(device_identifier, move(interface_name)); !candidate.is_null())
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return candidate;
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if (auto candidate = NE2000NetworkAdapter::try_to_initialize(device_identifier, move(interface_name)); !candidate.is_null())
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return candidate;
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return {};
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}
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bool NetworkingManagement::initialize()
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{
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if (!kernel_command_line().is_physical_networking_disabled()) {
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PCI::enumerate([&](PCI::DeviceIdentifier const& device_identifier) {
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// Note: PCI class 2 is the class of Network devices
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if (device_identifier.class_code().value() != 0x02)
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return;
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if (auto adapter = determine_network_device(device_identifier); !adapter.is_null())
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m_adapters.append(adapter.release_nonnull());
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});
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}
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auto loopback = LoopbackAdapter::try_create();
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VERIFY(loopback);
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m_adapters.append(*loopback);
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m_loopback_adapter = loopback;
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return true;
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}
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}
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