blob: add a magic offset to nesting cookies to ensure that NULL is never returned as a normal value

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/blob.h b/blob.h
index 846de6e..fa430a8 100644
--- a/blob.h
+++ b/blob.h
@@ -28,6 +28,8 @@
 
 #include "utils.h"
 
+#define BLOB_COOKIE		0x01234567
+
 enum {
 	BLOB_ATTR_UNSPEC,
 	BLOB_ATTR_NESTED,