connection outbound freezes for the client on a certain condition

[cybersoulK]

hi! having a strange bug where the connection outbound freezes for the client, but inbound still works normally

after a certain condition, not easy to replicate, usually takes 10 minutes, and a big amount of packages sent at once, like 30 packets at once by the server to the client

statistics below is after it freezes, and within 1 second interval:

client: incoming => new packets: 72, new bytes: 55033. outgoing => new packets: 18, new bytes: 755.

server: 
incoming => new packets: 0, new bytes: 0. outgoing => new packets: 91, new bytes: 66947.

i do have my own transport layer, and flush 300 times every second with a web worker (if there is any data), maybe that's why, and interrupts something in tokio::select?

let action = tokio::select! {

msg = server.recv() => msg.map(|msg| {

    (ServerAction::Receive(msg.message.to_vec()), msg.remote_addr)
}).ok(),

msg = rx_send_merge.recv() => msg.map(|(packet, remote_addr)| {

     (ServerAction::Send(packet), remote_addr)
}),

msg = rx_flush.recv() => msg.map(|remote_addr| {

     (ServerAction::Flush, remote_addr)
}),

[cybersoulK]

i also do have maximum MTU at 1100, could that be why?

and it freezes for only one client at a time, while having clients still work normally, so less likely to be tokio::select! ?

another info: it happens both on localhost and remotely

[cybersoulK]

Conclusion: after an burst of packages (10-20 packets at the same time?), the client decides to start fragmenting packages outbound, which fell below the 1100 mtu, (maybe starts fragmenting by 500 bytes), and the webrtc-unreliable crate doesn't have a way to handle fragmented packages yet

[kyren]

webrtc-unreliable crate doesn't have a way to handle unfragmented packages yet

I'm very confused, that's not true? Unfragmented at what layer?

[cybersoulK]

webrtc-unreliable crate doesn't have a way to handle unfragmented packages yet

I'm very confused, that's not true? Unfragmented at what layer?

sorry, mean't to say fragmented, corrected the comment.