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Kernel: Implement TCP listening sockets and incoming connections

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This commit is contained in:
Conrad Pankoff 2019-08-09 12:48:28 +10:00 • committed by Andreas Kling
parent a53437aa06
commit 3eb659a2bb
3 changed files with 89 additions and 15 deletions
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23
Kernel/Net/NetworkTask.cpp
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@ -353,10 +353,24 @@ void handle_tcp(const EthernetFrameHeader& eth, int frame_size)
return;
case TCPSocket::State::Listen:
switch (tcp_packet.flags()) {
case TCPFlags::SYN:
kprintf("handle_tcp: incoming connections not supported\n");
// socket->send_tcp_packet(TCPFlags::RST);
case TCPFlags::SYN: {
kprintf("handle_tcp: incoming connection\n");
auto& local_address = ipv4_packet.destination();
auto& peer_address = ipv4_packet.source();
auto client = socket->create_client(local_address, tcp_packet.destination_port(), peer_address, tcp_packet.source_port());
if (!client) {
kprintf("handle_tcp: couldn't create client socket\n");
return;
}
kprintf("handle_tcp: created new client socket with tuple %s\n", client->tuple().to_string().characters());
client->set_sequence_number(1000);
client->set_ack_number(tcp_packet.sequence_number() + payload_size + 1);
client->send_tcp_packet(TCPFlags::SYN | TCPFlags::ACK);
client->set_sequence_number(1001);
client->set_state(TCPSocket::State::SynReceived);
kprintf("handle_tcp: Closed -> SynReceived\n");
return;
}
default:
kprintf("handle_tcp: unexpected flags in Listen state\n");
// socket->send_tcp_packet(TCPFlags::RST);
@ -389,7 +403,8 @@ void handle_tcp(const EthernetFrameHeader& eth, int frame_size)
case TCPFlags::ACK:
socket->set_ack_number(tcp_packet.sequence_number() + payload_size + 1);
socket->set_state(TCPSocket::State::Established);
socket->set_connected(true);
if (socket->direction() == TCPSocket::Direction::Outgoing)
socket->set_connected(true);
kprintf("handle_tcp: SynReceived -> Established\n");
return;
default: