From 03a4835ed86de500f4fb244a7d4953d8ec358c8e Mon Sep 17 00:00:00 2001
From: Alex Janka <alex@alexjanka.com>
Date: Tue, 5 Mar 2024 10:06:06 +1100
Subject: [PATCH] tlv8 wronglength error more descriptive

---
 homekit-controller/src/tlv8/mod.rs | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/homekit-controller/src/tlv8/mod.rs b/homekit-controller/src/tlv8/mod.rs
index 26e1e10..794e439 100644
--- a/homekit-controller/src/tlv8/mod.rs
+++ b/homekit-controller/src/tlv8/mod.rs
@@ -80,7 +80,10 @@ pub fn decode(data: &[u8]) -> Result<HashMap<u8, Vec<u8>>, TlvCodecError> {
         let tlv_len = (data[1] as usize) + 2;
         let current;
         if tlv_len > data.len() {
-            return Err(TlvCodecError::WrongLength);
+            return Err(TlvCodecError::WrongLength {
+                expected: tlv_len,
+                got: data.len(),
+            });
         }
 
         (current, data) = data.split_at(tlv_len);
@@ -90,7 +93,10 @@ pub fn decode(data: &[u8]) -> Result<HashMap<u8, Vec<u8>>, TlvCodecError> {
         }
 
         if current.len() < tlv_len {
-            return Err(TlvCodecError::WrongLength);
+            return Err(TlvCodecError::WrongLength {
+                expected: tlv_len,
+                got: current.len(),
+            });
         }
 
         let tlv_type = current[0];
@@ -110,7 +116,7 @@ pub enum TlvCodecError {
     #[error("too short")]
     TooShort,
     #[error("wrong length")]
-    WrongLength,
+    WrongLength { expected: usize, got: usize },
 }
 
 pub trait TlvEncode {