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Kernel: Handle listening socket disappearing during incoming handshake

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This commit is contained in:
Conrad Pankoff 2019-09-08 19:37:05 +10:00 committed by Andreas Kling
parent feb6d1afe0
commit 3f1c3a341b
Notes: sideshowbarker 2024-07-19 12:11:34 +09:00 
Author: https://github.com/deoxxa
Commit: https://github.com/SerenityOS/serenity/commit/3f1c3a341b3
Pull-request: https://github.com/SerenityOS/serenity/pull/530
Reviewed-by: https://github.com/awesomekling
1 changed files with 25 additions and 4 deletions
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29
Kernel/Net/NetworkTask.cpp
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@ -453,11 +453,32 @@ void handle_tcp(const IPv4Packet& ipv4_packet)
switch (tcp_packet.flags()) {
case TCPFlags::ACK:
socket->set_ack_number(tcp_packet.sequence_number() + payload_size);
socket->set_state(TCPSocket::State::Established);
socket->set_setup_state(Socket::SetupState::Completed);
if (socket->direction() == TCPSocket::Direction::Outgoing)
switch (socket->direction()) {
case TCPSocket::Direction::Incoming:
if (!socket->has_originator()) {
kprintf("handle_tcp: connection doesn't have an originating socket; maybe it went away?\n");
socket->send_tcp_packet(TCPFlags::RST);
socket->set_state(TCPSocket::State::Closed);
return;
}
socket->set_state(TCPSocket::State::Established);
socket->set_setup_state(Socket::SetupState::Completed);
socket->release_to_originator();
return;
case TCPSocket::Direction::Outgoing:
socket->set_state(TCPSocket::State::Established);
socket->set_setup_state(Socket::SetupState::Completed);
socket->set_connected(true);
socket->release_to_originator();
return;
default:
kprintf("handle_tcp: got ACK in SynReceived state but direction is invalid (%s)\n", TCPSocket::to_string(socket->direction()));
socket->send_tcp_packet(TCPFlags::RST);
socket->set_state(TCPSocket::State::Closed);
return;
}
return;
default:
kprintf("handle_tcp: unexpected flags in SynReceived state\n");