On Wed, 2003-12-24 at 17:04, MH wrote:
> Sorry,
> 
> My quotes in perl got messed up:
> 
> perl -e 'print "\x80\x02"."\x00"x6' | nc -u 10.1.1.1 1701
> 
> and 
> 
> perl -e 'print "\x80\x02"."\x00"x6 ."\x01"' | nc -u 10.1.1.1 1701

this patch should fix this bug.. try it on cvs version

-- 
mydecay
S.P.I.N.E. Group - http://www.spine-group.org
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--- print-l2tp.c.old	2003-12-24 19:35:08.000000000 +0100
+++ print-l2tp.c	2003-12-25 11:40:08.924099880 +0100
@@ -492,9 +492,11 @@
 		/* Vendor Specific Attribute */
 	        printf("VENDOR%04x:", EXTRACT_16BITS(ptr)); ptr++;
 		printf("ATTR%04x", EXTRACT_16BITS(ptr)); ptr++;
-		printf("(");
-		print_octets((u_char *)ptr, len-6);
-		printf(")");
+		if (len > 6) {
+			printf("(");
+			print_octets((u_char *)ptr, len-6);
+			printf(")");
+		}
 	} else {
 		/* IETF-defined Attributes */
 		ptr++;
@@ -594,7 +596,8 @@
 		printf(")");
 	}
 
-	l2tp_avp_print(dat+len, length-len);
+	if (length >= len && len > 0)
+		l2tp_avp_print(dat+len, length-len);
 	return;
 
  trunc:

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