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https://github.com/SerenityOS/serenity.git
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94ca55cefd
As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
97 lines
3.7 KiB
C++
97 lines
3.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <Kernel/Net/IPv4.h>
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struct TCPFlags {
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enum : u16 {
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FIN = 0x01,
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SYN = 0x02,
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RST = 0x04,
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PUSH = 0x08,
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ACK = 0x10,
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URG = 0x20
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};
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};
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class [[gnu::packed]] TCPPacket
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{
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public:
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TCPPacket() {}
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~TCPPacket() {}
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size_t header_size() const { return data_offset() * sizeof(u32); }
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u16 source_port() const { return m_source_port; }
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void set_source_port(u16 port) { m_source_port = port; }
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u16 destination_port() const { return m_destination_port; }
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void set_destination_port(u16 port) { m_destination_port = port; }
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u32 sequence_number() const { return m_sequence_number; }
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void set_sequence_number(u32 number) { m_sequence_number = number; }
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u32 ack_number() const { return m_ack_number; }
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void set_ack_number(u32 number) { m_ack_number = number; }
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u16 flags() const { return m_flags_and_data_offset & 0x1ff; }
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void set_flags(u16 flags) { m_flags_and_data_offset = (m_flags_and_data_offset & ~0x1ff) | (flags & 0x1ff); }
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bool has_syn() const { return flags() & TCPFlags::SYN; }
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bool has_ack() const { return flags() & TCPFlags::ACK; }
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bool has_fin() const { return flags() & TCPFlags::FIN; }
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bool has_rst() const { return flags() & TCPFlags::RST; }
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u8 data_offset() const { return (m_flags_and_data_offset & 0xf000) >> 12; }
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void set_data_offset(u16 data_offset) { m_flags_and_data_offset = (m_flags_and_data_offset & ~0xf000) | data_offset << 12; }
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u16 window_size() const { return m_window_size; }
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void set_window_size(u16 window_size) { m_window_size = window_size; }
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u16 checksum() const { return m_checksum; }
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void set_checksum(u16 checksum) { m_checksum = checksum; }
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u16 urgent() const { return m_urgent; }
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void set_urgent(u16 urgent) { m_urgent = urgent; }
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const void* payload() const { return ((const u8*)this) + header_size(); }
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void* payload() { return ((u8*)this) + header_size(); }
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private:
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NetworkOrdered<u16> m_source_port;
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NetworkOrdered<u16> m_destination_port;
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NetworkOrdered<u32> m_sequence_number;
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NetworkOrdered<u32> m_ack_number;
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NetworkOrdered<u16> m_flags_and_data_offset;
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NetworkOrdered<u16> m_window_size;
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NetworkOrdered<u16> m_checksum;
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NetworkOrdered<u16> m_urgent;
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};
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static_assert(sizeof(TCPPacket) == 20);
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