From 5b3923141f159e2c2640c976f0ac7fd91b346e73 Mon Sep 17 00:00:00 2001
From: fros4943 <fros4943>
Date: Tue, 15 May 2007 18:13:32 +0000
Subject: [PATCH] added buffer overflow check

---
 platform/cooja/sys/log.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/platform/cooja/sys/log.c b/platform/cooja/sys/log.c
index fc3a5902a..95fc81bd8 100644
--- a/platform/cooja/sys/log.c
+++ b/platform/cooja/sys/log.c
@@ -26,17 +26,18 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- * $Id: log.c,v 1.1 2006/08/21 12:11:20 fros4943 Exp $
+ * $Id: log.c,v 1.2 2007/05/15 18:13:32 fros4943 Exp $
  */
 
 #include "sys/log.h"
 #include "lib/simEnvChange.h"
 #include <string.h>
 
+#define MAX_LOG_LENGTH 1024
 const struct simInterface simlog_interface;
 
 // COOJA variables
-char simLoggedData[1024];
+char simLoggedData[MAX_LOG_LENGTH];
 int simLoggedLength;
 char simLoggedFlag;
 
@@ -53,6 +54,12 @@ log_message(const char *part1, const char *part2)
 void
 simlog(const char *message)
 {
+  if (simLoggedLength + strlen(message) > MAX_LOG_LENGTH) {
+  	/* Dropping message due to buffer overflow */
+  	printf("Warning. Dropping log message due to buffer overflow\n");
+  	return;
+  }
+  
   memcpy(&simLoggedData[0] + simLoggedLength, &message[0], strlen(message));
   simLoggedLength += strlen(message);
   simLoggedFlag = 1;