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Kernel: Detect some outgoing TCP connection failures

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This commit is contained in:
Conrad Pankoff
2019-08-10 13:18:18 +10:00
committed by Andreas Kling
parent bd6d2c0819
commit fc3667c026
3 changed files with 46 additions and 1 deletions
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17
Kernel/Net/NetworkTask.cpp
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@@ -410,17 +410,32 @@ void handle_tcp(const IPv4Packet& ipv4_packet)
socket->send_tcp_packet(TCPFlags::ACK);
socket->set_state(TCPSocket::State::SynReceived);
return;
case TCPFlags::SYN | TCPFlags::ACK:
case TCPFlags::ACK | TCPFlags::SYN:
socket->set_ack_number(tcp_packet.sequence_number() + payload_size + 1);
socket->send_tcp_packet(TCPFlags::ACK);
socket->set_state(TCPSocket::State::Established);
socket->set_setup_state(Socket::SetupState::Completed);
socket->set_connected(true);
return;
case TCPFlags::ACK | TCPFlags::FIN:
socket->set_ack_number(tcp_packet.sequence_number() + payload_size + 1);
socket->send_tcp_packet(TCPFlags::ACK);
socket->set_state(TCPSocket::State::Closed);
socket->set_error(TCPSocket::Error::FINDuringConnect);
socket->set_setup_state(Socket::SetupState::Completed);
return;
case TCPFlags::ACK | TCPFlags::RST:
socket->set_ack_number(tcp_packet.sequence_number() + payload_size + 1);
socket->send_tcp_packet(TCPFlags::ACK);
socket->set_state(TCPSocket::State::Closed);
socket->set_error(TCPSocket::Error::RSTDuringConnect);
socket->set_setup_state(Socket::SetupState::Completed);
return;
default:
kprintf("handle_tcp: unexpected flags in SynSent state\n");
socket->send_tcp_packet(TCPFlags::RST);
socket->set_state(TCPSocket::State::Closed);
socket->set_error(TCPSocket::Error::UnexpectedFlagsDuringConnect);
socket->set_setup_state(Socket::SetupState::Completed);
return;
}