fix(ATT): Find Information Response format

AresMaster · fpistm · fpistm · commit e65d9f0378e4 · 2025-03-21T09:37:53.000+01:00
See Bluetooth Core Specification (v4.0 or v5.0),
ATTRIBUTE PROTOCOL (ATT) part.
Section 3.4.3.2 Find Information Response Table 3.8.
uuidLen is 16 or 128-bit.

Signed-off-by: Arkadiusz Ambroziak &lt;arekambroziak@op.pl&gt;
Co-Authored-by: Frederic Pillon &lt;frederic.pillon@st.com&gt;
diff --git a/src/utility/ATT.cpp b/src/utility/ATT.cpp
@@ -1728,8 +1728,8 @@ bool ATTClass::discoverDescriptors(uint16_t connectionHandle, BLERemoteDevice* d
         }
 
         if (responseBuffer[0] == ATT_OP_FIND_INFO_RESP) {
-          uint16_t lengthPerDescriptor = responseBuffer[1] * 4;
-          uint8_t uuidLen = 2;
+          uint8_t uuidLen = responseBuffer[1] == 1 ? 2 : 16;
+          uint16_t lengthPerDescriptor = uuidLen + 2;
 
           for (int i = 2; i < respLength; i += lengthPerDescriptor) {
             struct __attribute__ ((packed)) RawDescriptor {

Original file line number	Diff line number	Diff line change
`@@ -1728,8 +1728,8 @@ bool ATTClass::discoverDescriptors(uint16_t connectionHandle, BLERemoteDevice* d`
`1728`	`1728`	`}`
`1729`	`1729`
`1730`	`1730`	`if (responseBuffer[0] == ATT_OP_FIND_INFO_RESP) {`
`1731`		`- uint16_t lengthPerDescriptor = responseBuffer[1] * 4;`
`1732`		`- uint8_t uuidLen = 2;`
	`1731`	`+ uint8_t uuidLen = responseBuffer[1] == 1 ? 2 : 16;`
	`1732`	`+ uint16_t lengthPerDescriptor = uuidLen + 2;`
`1733`	`1733`
`1734`	`1734`	`for (int i = 2; i < respLength; i += lengthPerDescriptor) {`
`1735`	`1735`	`struct __attribute__ ((packed)) RawDescriptor {`