From fd23bb3a2b57d43c115005dcd70f1e18bb005032 Mon Sep 17 00:00:00 2001
From: Lizzy Fleckenstein <eliasfleckenstein@web.de>
Date: Fri, 6 Jan 2023 17:45:16 +0100
Subject: clean shutdown; send reliables

---
 src/send.rs | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 src/send.rs

(limited to 'src/send.rs')

diff --git a/src/send.rs b/src/send.rs
new file mode 100644
index 0000000..89c15c7
--- /dev/null
+++ b/src/send.rs
@@ -0,0 +1,55 @@
+use crate::*;
+use tokio::sync::watch;
+
+type AckResult = io::Result<Option<watch::Receiver<bool>>>;
+
+impl<S: UdpSender> RudpSender<S> {
+    pub async fn send(&self, pkt: Pkt<&[u8]>) -> AckResult {
+        self.share.send(PktType::Orig, pkt).await // TODO: splits
+    }
+}
+
+impl<S: UdpSender> RudpShare<S> {
+    pub async fn send(&self, tp: PktType, pkt: Pkt<&[u8]>) -> AckResult {
+        let mut buf = Vec::with_capacity(4 + 2 + 1 + 1 + 2 + 1 + pkt.data.len());
+        buf.write_u32::<BigEndian>(PROTO_ID)?;
+        buf.write_u16::<BigEndian>(*self.remote_id.read().await)?;
+        buf.write_u8(pkt.chan as u8)?;
+
+        let mut chan = self.chans[pkt.chan as usize].lock().await;
+        let seqnum = chan.seqnum;
+
+        if !pkt.unrel {
+            buf.write_u8(PktType::Rel as u8)?;
+            buf.write_u16::<BigEndian>(seqnum)?;
+        }
+
+        buf.write_u8(tp as u8)?;
+        buf.write(pkt.data)?;
+
+        self.send_raw(&buf).await?;
+
+        if pkt.unrel {
+            Ok(None)
+        } else {
+            // TODO: reliable window
+            let (tx, rx) = watch::channel(false);
+            chan.acks.insert(
+                seqnum,
+                Ack {
+                    tx,
+                    rx: rx.clone(),
+                    data: buf,
+                },
+            );
+            chan.seqnum += 1;
+
+            Ok(Some(rx))
+        }
+    }
+
+    pub async fn send_raw(&self, data: &[u8]) -> io::Result<()> {
+        self.udp_tx.send(data).await
+        // TODO: reset ping timeout
+    }
+}
-- 
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