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added buffer overflow check

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This commit is contained in:
fros4943 2007-05-15 18:13:32 +00:00
parent b0884bf41a
commit 5b3923141f
1 changed files with 9 additions and 2 deletions
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11
platform/cooja/sys/log.c
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@ -26,17 +26,18 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE. * 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 "sys/log.h"
#include "lib/simEnvChange.h" #include "lib/simEnvChange.h"
#include <string.h> #include <string.h>
#define MAX_LOG_LENGTH 1024
const struct simInterface simlog_interface; const struct simInterface simlog_interface;
// COOJA variables // COOJA variables
char simLoggedData[1024]; char simLoggedData[MAX_LOG_LENGTH];
int simLoggedLength; int simLoggedLength;
char simLoggedFlag; char simLoggedFlag;
@ -53,6 +54,12 @@ log_message(const char *part1, const char *part2)
void void
simlog(const char *message) 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)); memcpy(&simLoggedData[0] + simLoggedLength, &message[0], strlen(message));
simLoggedLength += strlen(message); simLoggedLength += strlen(message);
simLoggedFlag = 1; simLoggedFlag = 1;