From 2284aae2b8c7beec06e3c9847ee89169b4ac8e37 Mon Sep 17 00:00:00 2001 From: Stéphane Raimbault Date: Wed, 18 Feb 2015 17:52:45 +0100 Subject: [PATCH] Explicit check against Modbus broadcast address --- src/modbus.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/modbus.c b/src/modbus.c index 52d06af..8a27481 100644 --- a/src/modbus.c +++ b/src/modbus.c @@ -1055,8 +1055,8 @@ int modbus_reply(modbus_t *ctx, const uint8_t *req, break; } - /* Suppress any response when the request was a broadcast */ - return slave ? send_msg(ctx, rsp, rsp_length) : 0; + /* Suppress any responses when the request was a broadcast */ + return (slave == MODBUS_BROADCAST_ADDRESS) ? 0 : send_msg(ctx, rsp, rsp_length); } int modbus_reply_exception(modbus_t *ctx, const uint8_t *req, -- libgit2 0.21.4