diff options
Diffstat (limited to 'Kernel/Net/NetworkTask.cpp')
| -rw-r--r-- | Kernel/Net/NetworkTask.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Kernel/Net/NetworkTask.cpp b/Kernel/Net/NetworkTask.cpp index 7484f297e3..70457c02c4 100644 --- a/Kernel/Net/NetworkTask.cpp +++ b/Kernel/Net/NetworkTask.cpp @@ -533,9 +533,16 @@ void handle_tcp(const IPv4Packet& ipv4_packet, const Time& packet_timestamp) if (tcp_packet.sequence_number() != socket->ack_number()) { dbgln_if(TCP_DEBUG, "Discarding out of order packet: seq {} vs. ack {}", tcp_packet.sequence_number(), socket->ack_number()); + if (socket->duplicate_acks() < TCPSocket::maximum_duplicate_acks) { + dbgln_if(TCP_DEBUG, "Sending ACK with same ack number to trigger fast retransmission"); + socket->set_duplicate_acks(socket->duplicate_acks() + 1); + unused_rc = socket->send_tcp_packet(TCPFlags::ACK); + } return; } + socket->set_duplicate_acks(0); + if (tcp_packet.has_fin()) { if (payload_size != 0) socket->did_receive(ipv4_packet.source(), tcp_packet.source_port(), { &ipv4_packet, sizeof(IPv4Packet) + ipv4_packet.payload_size() }, packet_timestamp); |