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IPv4: More hacking on bringing up TCP support.

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This was a bit more complicated than I expected, but it's moving forward.
This commit is contained in:
Andreas Kling 2019-03-13 23:14:30 +01:00
parent 7aba68d51c
commit 032d9d7065
7 changed files with 193 additions and 33 deletions
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15
Kernel/NetworkTask.cpp
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@ -263,7 +263,7 @@ void handle_tcp(const EthernetFrameHeader& eth, int frame_size)
auto& tcp_packet = *static_cast<const TCPPacket*>(ipv4_packet.payload());
#ifdef TCP_DEBUG
kprintf("handle_tcp: source=%s:%u, destination=%s:%u seq=%u, ack=%u, flags=%w, window_size=%u\n",
kprintf("handle_tcp: source=%s:%u, destination=%s:%u seq_no=%u, ack_no=%u, flags=%w (%s %s), window_size=%u\n",
ipv4_packet.source().to_string().characters(),
tcp_packet.source_port(),
ipv4_packet.destination().to_string().characters(),
@ -271,6 +271,8 @@ void handle_tcp(const EthernetFrameHeader& eth, int frame_size)
tcp_packet.sequence_number(),
tcp_packet.ack_number(),
tcp_packet.flags(),
tcp_packet.has_syn() ? "SYN" : "",
tcp_packet.has_ack() ? "ACK" : "",
tcp_packet.window_size()
);
#endif
@ -288,5 +290,16 @@ void handle_tcp(const EthernetFrameHeader& eth, int frame_size)
LOCKER(socket->lock());
ASSERT(socket->type() == SOCK_STREAM);
ASSERT(socket->source_port() == tcp_packet.destination_port());
size_t payload_size = ipv4_packet.payload_size() - sizeof(TCPPacket);
if (tcp_packet.has_syn() && tcp_packet.has_ack()) {
socket->set_tcp_ack_number(socket->tcp_sequence_number() + payload_size + 1);
socket->send_tcp_packet(*adapter, TCPFlags::ACK);
kprintf("Connected!\n");
socket->set_tcp_state(Connected);
return;
}
socket->did_receive(ByteBuffer::copy((const byte*)&ipv4_packet, sizeof(IPv4Packet) + ipv4_packet.payload_size()));
}