Implement p-persistent CSMA

[m17rt] / m17app / src / app.rs

diff --git a/m17app/src/app.rs b/m17app/src/app.rs
index fbc9a083194b41a96f325e815251a75a305a3cd4..b1426638e28e1dd4a3dcef0d1ec96c5cbd2db5a9 100644 (file)
--- a/m17app/src/app.rs
+++ b/m17app/src/app.rs
@@ -1,7 +1,7 @@
 use crate::adapter::{PacketAdapter, StreamAdapter};
 use crate::tnc::Tnc;
 use m17core::kiss::{KissBuffer, KissCommand, KissFrame};
-use m17core::protocol::{EncryptionType, LsfFrame, PacketType};
+use m17core::protocol::{EncryptionType, LsfFrame, PacketType, StreamFrame};
 
 use log::debug;
 use std::collections::HashMap;
@@ -72,6 +72,8 @@ impl M17App {
     }
 
     pub fn close(&self) {
+        // TODO: blocking function to indicate TNC has finished closing
+        // then we could call this in a signal handler to ensure PTT is dropped before quit
         let _ = self.event_tx.send(TncControlEvent::Close);
     }
 }
@@ -91,11 +93,19 @@ impl TxHandle {
 
     // add more methods here for stream outgoing
 
-    pub fn transmit_stream_start(&self /* lsf?, payload? what needs to be configured ?! */) {}
+    pub fn transmit_stream_start(&self, lsf: LsfFrame) {
+        // TODO: is asking for an LsfFrame a good idea or unfriendly API?
+        // What I should do here is create a LinkSetup struct which wraps an LsfFrame and can be loaded with a raw one
+        let kiss_frame = KissFrame::new_stream_setup(&lsf.0).unwrap();
+        let _ = self.event_tx.send(TncControlEvent::Kiss(kiss_frame));
+    }
 
     // as long as there is only one TNC it is implied there is only ever one stream transmission in flight
 
-    pub fn transmit_stream_next(&self, /* next payload,  */ end_of_stream: bool) {}
+    pub fn transmit_stream_next(&self, stream: StreamFrame) {
+        let kiss_frame = KissFrame::new_stream_data(&stream).unwrap();
+        let _ = self.event_tx.send(TncControlEvent::Kiss(kiss_frame));
+    }
 }
 
 /// Synchronised structure for listeners subscribing to packets and streams.