Round trip packet modulation and demodulation via RRC

[m17rt] / m17app / src / app.rs

diff --git a/m17app/src/app.rs b/m17app/src/app.rs
index 561a2b7ae569b6266e6dc9d39a589fd18e712d0c..7d363dd1808522b986e06e687e39b82c3c8bd544 100644 (file)
--- a/m17app/src/app.rs
+++ b/m17app/src/app.rs
@@ -1,4 +1,5 @@
 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, StreamFrame};
@@ -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);
     }
 }
@@ -81,26 +84,29 @@ 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: 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();
+    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, stream: StreamFrame) {
+    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));
     }
@@ -193,7 +199,7 @@ 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(),
+                                LinkSetup::new_raw(lsf.clone()),
                                 packet_type.clone(),
                                 packet_payload.clone(),
                             );
@@ -215,7 +221,7 @@ 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 {