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Kernet/Net: Close a TCP connection using FIN|ACK instead of just FIN

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When initiating a connection termination, the FIN should be sent with
a ACK from the last received segment even if that ACK already been sent.
This commit is contained in:
Pierre Delagrave
2023-06-28 18:40:44 -04:00
committed by Andreas Kling
parent d33b99dd24
commit 55faff80df
1 changed files with 1 additions and 1 deletions
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2
Kernel/Net/TCPSocket.cpp
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@@ -534,7 +534,7 @@ void TCPSocket::shut_down_for_writing()
{
if (state() == State::Established) {
dbgln_if(TCP_SOCKET_DEBUG, " Sending FIN from Established and moving into FinWait1");
(void)send_tcp_packet(TCPFlags::FIN);
(void)send_tcp_packet(TCPFlags::FIN | TCPFlags::ACK);
set_state(State::FinWait1);
} else {
dbgln(" Shutting down TCPSocket for writing but not moving to FinWait1 since state is {}", to_string(state()));