a85d111cd1
The last IP address in an IPv4 subnet is considered the directed broadcast address, e.g. for 192.168.3.0/24 the directed broadcast address is 192.168.3.255. We need to consider this address as belonging to the interface. Here's an example with this fix applied, SerenityOS has 192.168.3.190: [gunnar@nyx ~]$ ping -b 192.168.3.255 WARNING: pinging broadcast address PING 192.168.3.255 (192.168.3.255) 56(84) bytes of data. 64 bytes from 192.168.3.175: icmp_seq=1 ttl=64 time=0.950 ms 64 bytes from 192.168.3.188: icmp_seq=1 ttl=64 time=2.33 ms 64 bytes from 192.168.3.46: icmp_seq=1 ttl=64 time=2.77 ms 64 bytes from 192.168.3.41: icmp_seq=1 ttl=64 time=4.15 ms 64 bytes from 192.168.3.190: icmp_seq=1 ttl=64 time=29.4 ms 64 bytes from 192.168.3.42: icmp_seq=1 ttl=64 time=30.8 ms 64 bytes from 192.168.3.55: icmp_seq=1 ttl=64 time=31.0 ms 64 bytes from 192.168.3.30: icmp_seq=1 ttl=64 time=33.2 ms 64 bytes from 192.168.3.31: icmp_seq=1 ttl=64 time=33.2 ms 64 bytes from 192.168.3.173: icmp_seq=1 ttl=64 time=41.7 ms 64 bytes from 192.168.3.43: icmp_seq=1 ttl=64 time=47.7 ms ^C --- 192.168.3.255 ping statistics --- 1 packets transmitted, 1 received, +10 duplicates, 0% packet loss, time 0ms, rtt min/avg/max/mdev = 0.950/23.376/47.676/16.539 ms [gunnar@nyx ~]$
94 lines
3.1 KiB
C++
94 lines
3.1 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/ByteBuffer.h>
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#include <AK/Function.h>
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#include <AK/MACAddress.h>
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#include <AK/SinglyLinkedList.h>
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#include <AK/Types.h>
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#include <AK/WeakPtr.h>
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#include <AK/Weakable.h>
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#include <Kernel/KBuffer.h>
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#include <Kernel/Net/ARP.h>
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#include <Kernel/Net/ICMP.h>
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#include <Kernel/Net/IPv4.h>
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#include <Kernel/UserOrKernelBuffer.h>
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namespace Kernel {
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class NetworkAdapter;
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class NetworkAdapter : public RefCounted<NetworkAdapter> {
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public:
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static void for_each(Function<void(NetworkAdapter&)>);
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static RefPtr<NetworkAdapter> from_ipv4_address(const IPv4Address&);
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static RefPtr<NetworkAdapter> lookup_by_name(const StringView&);
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virtual ~NetworkAdapter();
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virtual const char* class_name() const = 0;
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const String& name() const { return m_name; }
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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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IPv4Address ipv4_gateway() const { return m_ipv4_gateway; }
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virtual bool link_up() { return false; }
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void set_ipv4_address(const IPv4Address&);
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void set_ipv4_netmask(const IPv4Address&);
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void set_ipv4_gateway(const IPv4Address&);
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void send(const MACAddress&, const ARPPacket&);
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KResult send_ipv4(const MACAddress&, const IPv4Address&, IPv4Protocol, const UserOrKernelBuffer& payload, size_t payload_size, u8 ttl);
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KResult send_ipv4_fragmented(const MACAddress&, const IPv4Address&, IPv4Protocol, const UserOrKernelBuffer& payload, size_t payload_size, u8 ttl);
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size_t dequeue_packet(u8* buffer, size_t buffer_size, Time& 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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Function<void()> on_receive;
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protected:
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NetworkAdapter();
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void set_interface_name(const StringView& basename);
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void set_mac_address(const MACAddress& mac_address) { m_mac_address = mac_address; }
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virtual void send_raw(ReadonlyBytes) = 0;
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void did_receive(ReadonlyBytes);
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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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IPv4Address m_ipv4_gateway;
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struct PacketWithTimestamp {
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KBuffer packet;
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Time timestamp;
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};
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SinglyLinkedList<PacketWithTimestamp> m_packet_queue;
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SinglyLinkedList<KBuffer> m_unused_packet_buffers;
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size_t m_unused_packet_buffers_count { 0 };
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String 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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