MPLS_LS_TTL_MASK
mpls_mask |= MPLS_LS_TTL_MASK;
#define MPLS_TTL_MASK (MPLS_LS_TTL_MASK >> MPLS_LS_TTL_SHIFT)
lse->mpls_ttl = (entry & MPLS_LS_TTL_MASK) >> MPLS_LS_TTL_SHIFT;
ttl = (lse & MPLS_LS_TTL_MASK) >> MPLS_LS_TTL_SHIFT;
lse &= ~MPLS_LS_TTL_MASK;
result.ttl = (entry & MPLS_LS_TTL_MASK) >> MPLS_LS_TTL_SHIFT;
new_lse &= ~MPLS_LS_TTL_MASK;