RTLSDR input via rtl_fm

[m17rt] / m17app / src / app.rs

diff --git a/m17app/src/app.rs b/m17app/src/app.rs
index fbc9a083194b41a96f325e815251a75a305a3cd4..ae019768fe97876bf8960c25f0243e42186e1044 100644 (file)
--- a/m17app/src/app.rs
+++ b/m17app/src/app.rs
@@ -1,7 +1,8 @@
 use crate::adapter::{PacketAdapter, StreamAdapter};
+use crate::link_setup::LinkSetup;
 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 +73,8 @@ 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);
     }
 }
@@ -81,21 +84,32 @@ pub struct TxHandle {
 }
 
 impl TxHandle {
-    pub fn transmit_packet(&self, packet_type: PacketType, payload: &[u8]) {
-        // hang on where do we get the LSF details from? We need a destination obviously
-        // our source address needs to be configured here too
-        // also there is possible CAN, encryption, meta payload
-
-        // we will immediately convert this into a KISS payload before sending into channel so we only need borrow on data
+    pub fn transmit_packet(&self, link_setup: &LinkSetup, packet_type: PacketType, payload: &[u8]) {
+        let (pack_type, pack_type_len) = packet_type.as_proto();
+        if pack_type_len + payload.len() > 823 {
+            // TODO: error for invalid transmission type
+            return;
+        }
+        let mut full_payload = vec![];
+        full_payload.extend_from_slice(&pack_type[0..pack_type_len]);
+        full_payload.extend_from_slice(payload);
+        let crc = m17core::crc::m17_crc(&full_payload);
+        full_payload.extend_from_slice(&crc.to_be_bytes());
+        let kiss_frame = KissFrame::new_full_packet(&link_setup.raw.0, &full_payload).unwrap();
+        let _ = self.event_tx.send(TncControlEvent::Kiss(kiss_frame));
     }
 
-    // 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, link_setup: &LinkSetup) {
+        let kiss_frame = KissFrame::new_stream_setup(&link_setup.raw.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.
@@ -119,6 +133,7 @@ impl Adapters {
 }
 
 /// Carries a request from a method on M17App to the TNC's writer thread, which will execute it.
+#[allow(clippy::large_enum_variant)]
 enum TncControlEvent {
     Kiss(KissFrame),
     Start,
@@ -130,8 +145,8 @@ fn spawn_reader<T: Tnc>(mut tnc: T, adapters: Arc<RwLock<Adapters>>) {
         let mut kiss_buffer = KissBuffer::new();
         let mut stream_running = false;
         loop {
-            let mut buf = kiss_buffer.buf_remaining();
-            let n = match tnc.read(&mut buf) {
+            let buf = kiss_buffer.buf_remaining();
+            let n = match tnc.read(buf) {
                 Ok(n) => n,
                 Err(_) => break,
             };
@@ -185,8 +200,8 @@ fn spawn_reader<T: Tnc>(mut tnc: T, adapters: Arc<RwLock<Adapters>>) {
                             adapters.read().unwrap().packet.values().cloned().collect();
                         for s in subs {
                             s.packet_received(
-                                lsf.clone(),
-                                packet_type.clone(),
+                                LinkSetup::new_raw(lsf.clone()),
+                                packet_type,
                                 packet_payload.clone(),
                             );
                         }
@@ -207,7 +222,7 @@ fn spawn_reader<T: Tnc>(mut tnc: T, adapters: Arc<RwLock<Adapters>>) {
                             let subs: Vec<_> =
                                 adapters.read().unwrap().stream.values().cloned().collect();
                             for s in subs {
-                                s.stream_began(lsf.clone());
+                                s.stream_began(LinkSetup::new_raw(lsf.clone()));
                             }
                         } else if n == 26 {
                             if !stream_running {
@@ -246,7 +261,7 @@ fn spawn_writer<T: Tnc>(mut tnc: T, event_rx: mpsc::Receiver<TncControlEvent>) {
         while let Ok(ev) = event_rx.recv() {
             match ev {
                 TncControlEvent::Kiss(k) => {
-                    if let Err(e) = tnc.write_all(&k.as_bytes()) {
+                    if let Err(e) = tnc.write_all(k.as_bytes()) {
                         debug!("kiss send err: {:?}", e);
                         return;
                     }