(assign_timeval): Added overflow checking.

src/server/conf-file.c

 /*
- * $Id: conf-file.c,v 1.30 2003/07/16 07:33:01 ceder Exp $
+ * $Id: conf-file.c,v 1.31 2003/07/21 22:26:16 ceder Exp $
  * Copyright (C) 1994-1995, 1998-1999, 2001-2002  Lysator Academic Computer Association.
  *
  * This file is part of the LysKOM server.
@@ -429,8 +429,10 @@ assign_timeval(const char *val,
 {
     char *tail = NULL;
     double number;
+    double err;
     const char *suffix;
     const struct suffix_conversion *s;
+    struct timeval tv;
 
     assert(par->default_suffix != NULL);
 
@@ -454,12 +456,33 @@ assign_timeval(const char *val,
 		break;
 
 	if (s->suffix == NULL)
+	{
+	    kom_log("Bad suffix for parameter %s\n", par->name);
 	    return FAILURE;
+	}
 
 	number *= s->factor;
 
-	*(struct timeval*)par->value = timeval_ctor(
-	    number, ((number - (int)number) * 1000000) + 0.5);
+	if (number < 0)
+	{
+	    kom_log("Negative values not supported for parameter %s\n",
+		    par->name);
+	    return FAILURE;
+	}
+
+	tv = timeval_ctor(number, ((number - (int)number) * 1000000) + 0.5);
+	err = (tv.tv_sec + 1.0e-6 * tv.tv_usec) - number;
+	if (err < 0)
+	    err = -err;
+	if ((err > 1.0e-6 && err < 1.0e-6 * number)
+	    || tv.tv_sec < 0
+	    || tv.tv_usec < 0
+	    || tv.tv_usec >= 1000000)
+	{
+	    kom_log("Overflow for parameter %s (%s)\n", par->name, val);
+	    return FAILURE;
+	}
+	*(struct timeval*)par->value = tv;
     }
     return OK;
 }