X-Git-Url: https://code.octet-stream.net/m17rt/blobdiff_plain/21b7d95e42fd374a33e0f18d3e3f406642e46322..7b7b572052951018da4d6d0f5753d627836236ad:/m17core/src/protocol.rs

diff --git a/m17core/src/protocol.rs b/m17core/src/protocol.rs
index 382fb9f..82a5721 100755
--- a/m17core/src/protocol.rs
+++ b/m17core/src/protocol.rs
@@ -29,7 +29,7 @@ pub enum EncryptionType {
 pub enum Frame {
     Lsf(LsfFrame),
     Stream(StreamFrame),
-    // Packet
+    Packet(PacketFrame),
     // BERT
 }
 
@@ -133,6 +133,8 @@ impl LsfFrame {
         }
     }
 
+    // TODO: encryption sub-type
+
     pub fn channel_access_number(&self) -> u8 {
         (self.0[12] >> 7) & 0x0f
     }
@@ -156,6 +158,33 @@ pub struct StreamFrame {
     pub stream_data: [u8; 16],
 }
 
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct PacketFrame {
+    /// Application packet payload (chunk)
+    pub payload: [u8; 25],
+
+    /// Frame counter, which provides different information depending on whether this is the last frame or not.
+    pub counter: PacketFrameCounter,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub enum PacketFrameCounter {
+    /// Any packet frame that comes after the LSF and is not the final frame.
+    Frame {
+        /// Which frame this is in the superframe, from 0 to 31 inclusive.
+        ///
+        /// If a 33rd frame exists (index 32), it will be a `FinalFrame` instead.
+        ///
+        /// All 25 bytes of of `payload` are filled and valid.
+        index: usize,
+    },
+    /// The final frame in the packet superframe.
+    FinalFrame {
+        /// The number of bytes in `payload` that are filled.
+        payload_len: usize,
+    },
+}
+
 pub struct LichCollection([Option<[u8; 5]>; 6]);
 
 impl LichCollection {