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chore: make idm magic value three bytes

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This commit is contained in:
Alex Zenla
2024-04-15 03:03:17 +00:00
parent 24c71e9725
commit 1b4b9020e6
2 changed files with 22 additions and 14 deletions
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28
crates/daemon/src/idm.rs
View File

@ -22,6 +22,9 @@ use tokio::{
task::JoinHandle,
};
const IDM_TX_QUEUE_LEN: usize = 100;
const IDM_SNOOP_QUEUE_LEN: usize = 100;
type BackendFeedMap = Arc<Mutex<HashMap<u32, Sender<IdmPacket>>>>;
type ClientMap = Arc<Mutex<HashMap<u32, IdmClient>>>;
@ -74,8 +77,8 @@ impl DaemonIdm {
pub async fn new() -> Result<DaemonIdm> {
let (service, tx_raw_sender, rx_receiver) =
ChannelService::new("krata-channel".to_string(), None).await?;
let (tx_sender, tx_receiver) = channel(100);
let (snoop_sender, _) = broadcast::channel(100);
let (tx_sender, tx_receiver) = channel(IDM_TX_QUEUE_LEN);
let (snoop_sender, _) = broadcast::channel(IDM_SNOOP_QUEUE_LEN);
let task = service.launch().await?;
let clients = Arc::new(Mutex::new(HashMap::new()));
let feeds = Arc::new(Mutex::new(HashMap::new()));
@ -120,17 +123,17 @@ impl DaemonIdm {
if let Some(data) = data {
let buffer = buffers.entry(domid).or_insert_with_key(|_| BytesMut::new());
buffer.extend_from_slice(&data);
if buffer.len() < 6 {
if buffer.len() < 7 {
continue;
}
if buffer[0] != 0xff || buffer[1] != 0xff {
if buffer[0] != 0xff || buffer[1] != 0xfe || buffer[2] != 0xff {
buffer.clear();
continue;
}
let size = (buffer[2] as u32 | (buffer[3] as u32) << 8 | (buffer[4] as u32) << 16 | (buffer[5] as u32) << 24) as usize;
let needed = size + 6;
let size = (buffer[3] as u32 | (buffer[4] as u32) << 8 | (buffer[5] as u32) << 16 | (buffer[6] as u32) << 24) as usize;
let needed = size + 7;
if buffer.len() < needed {
continue;
}
@ -165,14 +168,15 @@ impl DaemonIdm {
x = self.tx_receiver.recv() => match x {
Some((domid, packet)) => {
let data = packet.encode_to_vec();
let mut buffer = vec![0u8; 6];
let mut buffer = vec![0u8; 7];
let length = data.len() as u32;
buffer[0] = 0xff;
buffer[1] = 0xff;
buffer[2] = length as u8;
buffer[3] = (length << 8) as u8;
buffer[4] = (length << 16) as u8;
buffer[5] = (length << 24) as u8;
buffer[1] = 0xfe;
buffer[2] = 0xff;
buffer[3] = length as u8;
buffer[4] = (length << 8) as u8;
buffer[5] = (length << 16) as u8;
buffer[6] = (length << 24) as u8;
buffer.extend_from_slice(&data);
self.tx_raw_sender.send((domid, buffer)).await?;
let _ = self.snoop_sender.send(DaemonIdmSnoopPacket { from: 0, to: domid, packet });

8
crates/krata/src/idm/client.rs
View File

@ -74,7 +74,11 @@ impl IdmBackend for IdmFileBackend {
return Ok(IdmPacket::default());
}
let b2 = guard.get_inner_mut().read_u8().await?;
if b2 != 0xff {
if b2 != 0xfe {
return Ok(IdmPacket::default());
}
let b3 = guard.get_inner_mut().read_u8().await?;
if b3 != 0xff {
return Ok(IdmPacket::default());
}
let size = guard.get_inner_mut().read_u32_le().await?;
@ -92,7 +96,7 @@ impl IdmBackend for IdmFileBackend {
async fn send(&mut self, packet: IdmPacket) -> Result<()> {
let mut file = self.write.lock().await;
let data = packet.encode_to_vec();
file.write_all(&[0xff, 0xff]).await?;
file.write_all(&[0xff, 0xfe, 0xff]).await?;
file.write_u32_le(data.len() as u32).await?;
file.write_all(&data).await?;
Ok(())