[PATCH] attrib: Fix Read Blob error responses

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Read blob response with offset equal to value length should return
zero length value intead of Invalid Offset Error.
Found during qualification test case TC/GAR/SR/BV-08-C Read behind
Long Characteristic Descriptor.
---
 src/attrib-server.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/attrib-server.c b/src/attrib-server.c
index 6571577..69e6cdc 100644
--- a/src/attrib-server.c
+++ b/src/attrib-server.c
@@ -856,7 +856,7 @@ static uint16_t read_blob(struct gatt_channel *channel, uint16_t handle,
 
 	a = l->data;
 
-	if (a->len <= offset)
+	if (a->len < offset)
 		return enc_error_resp(ATT_OP_READ_BLOB_REQ, handle,
 					ATT_ECODE_INVALID_OFFSET, pdu, len);
 
-- 
1.9.3

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