From 89998d4c28531fd3700754fbd0bff184615b725e Mon Sep 17 00:00:00 2001
From: Stéphane Raimbault <stephane.raimbault@gmail.com>
Date: Fri, 20 May 2016 12:36:49 +0200
Subject: [PATCH] Fix handling of invalid function code (closes #315)

---
 src/modbus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/modbus.c b/src/modbus.c
index 850a597..95c6db0 100644
--- a/src/modbus.c
+++ b/src/modbus.c
@@ -1027,7 +1027,7 @@ int modbus_reply(modbus_t *ctx, const uint8_t *req,
 
     default:
         rsp_length = response_exception(
-            ctx, &sft, MODBUS_EXCEPTION_ILLEGAL_FUNCTION, rsp, FALSE,
+            ctx, &sft, MODBUS_EXCEPTION_ILLEGAL_FUNCTION, rsp, TRUE,
             "Unknown Modbus function code: 0x%0X\n", function);
         break;
     }
--
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