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Kernel/TCPSocket: Read window size from peer

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During receive_tcp_packet(), we now set m_send_window_size for the
socket if it is different from the default.

This removes one FIXME from TCPSocket.h.
This commit is contained in:
Optimoos 2023-06-18 22:05:00 -04:00 committed by Andreas Kling
parent 701b170dc0
commit e72894f23d
Notes: sideshowbarker 2024-07-17 04:09:56 +09:00 
Author: https://github.com/Optimoos
Commit: https://github.com/SerenityOS/serenity/commit/e72894f23d
Pull-request: https://github.com/SerenityOS/serenity/pull/19473
2 changed files with 5 additions and 1 deletions
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3
Kernel/Net/TCPSocket.cpp
View file

@ -321,6 +321,9 @@ void TCPSocket::receive_tcp_packet(TCPPacket const& packet, u16 size)
if (old_adapter)
old_adapter->release_packet_buffer(*packet.buffer);
TCPPacket& tcp_packet = *(TCPPacket*)(packet.buffer->buffer->data() + packet.ipv4_payload_offset);
if (m_send_window_size != tcp_packet.window_size()) {
m_send_window_size = tcp_packet.window_size();
}
auto payload_size = packet.buffer->buffer->data() + packet.buffer->buffer->size() - (u8*)tcp_packet.payload();
unacked_packets.size -= payload_size;
evaluate_block_conditions();

3
Kernel/Net/TCPSocket.h
View file

@ -223,7 +223,8 @@ private:
UnixDateTime m_last_retransmit_time;
u32 m_retransmit_attempts { 0 };
// FIXME: Parse window size TCP option from the peer
// Default to maximum window size. receive_tcp_packet() will update from the
// peer's advertised window size.
u32 m_send_window_size { 64 * KiB };
IntrusiveListNode<TCPSocket> m_retransmit_list_node;