bird/proto/ospf/lsalib.h
Ondrej Zajicek (work) 5a50a98980 OSPF: Opaque LSAs and Router Information LSA
Add support for OSPFv2 Opaque LSAs (RFC 5250) and for Router Information
LSA (RFC 7770). The second part is here mainly for testing opaque LSAs.
2019-01-24 22:45:27 +01:00

71 lines
3 KiB
C

/*
* BIRD -- OSPF
*
* (c) 1999--2000 Ondrej Filip <feela@network.cz>
* (c) 2009--2014 Ondrej Zajicek <santiago@crfreenet.org>
* (c) 2009--2014 CZ.NIC z.s.p.o.
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_OSPF_LSALIB_H_
#define _BIRD_OSPF_LSALIB_H_
#ifdef CPU_BIG_ENDIAN
static inline void lsa_hton_hdr(struct ospf_lsa_header *h, struct ospf_lsa_header *n) { *n = *h; };
static inline void lsa_ntoh_hdr(struct ospf_lsa_header *n, struct ospf_lsa_header *h) { *h = *n; };
static inline void lsa_hton_body(void *h, void *n, u16 len) { ASSERT(h != n); memcpy(n, h, len); };
static inline void lsa_ntoh_body(void *n, void *h, u16 len) { ASSERT(n != h); memcpy(h, n, len); };
static inline void lsa_hton_body1(void *h, u16 len) { };
static inline void lsa_ntoh_body1(void *n, u16 len) { };
#else
void lsa_hton_hdr(struct ospf_lsa_header *h, struct ospf_lsa_header *n);
void lsa_ntoh_hdr(struct ospf_lsa_header *n, struct ospf_lsa_header *h);
void lsa_hton_body(void *h, void *n, u16 len);
void lsa_ntoh_body(void *n, void *h, u16 len);
static inline void lsa_hton_body1(void *h, u16 len) { lsa_hton_body(h, h, len); };
static inline void lsa_ntoh_body1(void *n, u16 len) { lsa_ntoh_body(n, n, len); };
#endif
struct ospf_lsa_rt_walk {
struct top_hash_entry *en;
void *buf, *bufend;
int ospf2;
u16 type, metric;
u32 id, data, lif, nif;
};
void lsa_get_type_domain_(u32 type, u32 id, struct ospf_iface *ifa, u32 *otype, u32 *domain);
static inline void lsa_get_type_domain(struct ospf_lsa_header *lsa, struct ospf_iface *ifa, u32 *otype, u32 *domain)
{ lsa_get_type_domain_(lsa->type_raw, lsa->id, ifa, otype, domain); }
static inline u32 lsa_get_etype(struct ospf_lsa_header *h, struct ospf_proto *p)
{ return ospf_is_v2(p) ? (h->type_raw & LSA_T_V2_MASK) : h->type_raw; }
/* Assuming OSPFv2 - All U-bit LSAs are mapped to Opaque LSAs */
static inline int lsa_is_opaque(u32 type)
{ return !!(type & LSA_UBIT); }
u32 lsa_get_opaque_type(u32 type);
int lsa_flooding_allowed(u32 type, u32 domain, struct ospf_iface *ifa);
int lsa_is_acceptable(u32 type, struct ospf_neighbor *n, struct ospf_proto *p);
void lsa_generate_checksum(struct ospf_lsa_header *lsa, const u8 *body);
u16 lsa_verify_checksum(const void *lsa_n, int lsa_len);
#define CMP_NEWER 1
#define CMP_SAME 0
#define CMP_OLDER -1
int lsa_comp(struct ospf_lsa_header *l1, struct ospf_lsa_header *l2);
void lsa_walk_rt_init(struct ospf_proto *po, struct top_hash_entry *act, struct ospf_lsa_rt_walk *rt);
int lsa_walk_rt(struct ospf_lsa_rt_walk *rt);
void lsa_parse_sum_net(struct top_hash_entry *en, int ospf2, int af, net_addr *net, u8 *pxopts, u32 *metric);
void lsa_parse_sum_rt(struct top_hash_entry *en, int ospf2, u32 *drid, u32 *metric, u32 *options);
void lsa_parse_ext(struct top_hash_entry *en, int ospf2, int af, struct ospf_lsa_ext_local *rt);
int lsa_validate(struct ospf_lsa_header *lsa, u32 lsa_type, int ospf2, void *body);
static inline btime lsa_inst_age(struct top_hash_entry *en)
{ return current_time() - en->inst_time; }
#endif /* _BIRD_OSPF_LSALIB_H_ */