1 #ifndef MPLS_INTERNAL_H
2 #define MPLS_INTERNAL_H
5 __be32 label_stack_entry;
8 struct mpls_entry_decoded {
18 struct ctl_table_header *sysctl;
23 static inline struct mpls_shim_hdr *mpls_hdr(const struct sk_buff *skb)
25 return (struct mpls_shim_hdr *)skb_network_header(skb);
28 static inline struct mpls_shim_hdr mpls_entry_encode(u32 label, unsigned ttl, unsigned tc, bool bos)
30 struct mpls_shim_hdr result;
31 result.label_stack_entry =
32 cpu_to_be32((label << MPLS_LS_LABEL_SHIFT) |
33 (tc << MPLS_LS_TC_SHIFT) |
34 (bos ? (1 << MPLS_LS_S_SHIFT) : 0) |
35 (ttl << MPLS_LS_TTL_SHIFT));
39 static inline struct mpls_entry_decoded mpls_entry_decode(struct mpls_shim_hdr *hdr)
41 struct mpls_entry_decoded result;
42 unsigned entry = be32_to_cpu(hdr->label_stack_entry);
44 result.label = (entry & MPLS_LS_LABEL_MASK) >> MPLS_LS_LABEL_SHIFT;
45 result.ttl = (entry & MPLS_LS_TTL_MASK) >> MPLS_LS_TTL_SHIFT;
46 result.tc = (entry & MPLS_LS_TC_MASK) >> MPLS_LS_TC_SHIFT;
47 result.bos = (entry & MPLS_LS_S_MASK) >> MPLS_LS_S_SHIFT;
52 int nla_put_labels(struct sk_buff *skb, int attrtype, u8 labels, const u32 label[]);
53 int nla_get_labels(const struct nlattr *nla, u32 max_labels, u32 *labels, u32 label[]);
55 #endif /* MPLS_INTERNAL_H */