diff options
Diffstat (limited to 'lib/mpls.h')
| -rw-r--r-- | lib/mpls.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/lib/mpls.h b/lib/mpls.h index 6cf0142755..d78fcb1f57 100644 --- a/lib/mpls.h +++ b/lib/mpls.h @@ -76,8 +76,13 @@ typedef unsigned int mpls_lse_t; /* MPLS label value as a 32-bit (mostly we only care about the label value). */ typedef unsigned int mpls_label_t; -#define MPLS_NO_LABEL 0xFFFFFFFF -#define MPLS_INVALID_LABEL 0xFFFFFFFF +/* The MPLS explicit-null label is 0 which means when you memset a mpls_label_t + * to zero you have set that variable to explicit-null which was probably not + * your intent. The work-around is to use one bit to indicate if the + * mpls_label_t has been set by the user. MPLS_INVALID_LABEL has this bit clear + * so that we can use MPLS_INVALID_LABEL to initialize mpls_label_t variables. + */ +#define MPLS_INVALID_LABEL 0xFFFDFFFF /* LSP types. */ enum lsp_types_t |