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OSPF: Redesign LSA checksumming

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New LSA checksumming code separates generic Fletcher-16 and OSPF-specific
code and avoids back and forth endianity conversions, making it much more
readable and also several times faster.
This commit is contained in:
Ondrej Zajicek
2015-05-01 14:40:56 +02:00
parent 30d09eb96e
commit 77edab6409
5 changed files with 226 additions and 133 deletions
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4
proto/ospf/lsalib.h
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@@ -46,9 +46,9 @@ static inline u32 lsa_get_etype(struct ospf_lsa_header *h, struct ospf_proto *p)
int lsa_flooding_allowed(u32 type, u32 domain, struct ospf_iface *ifa);
void lsa_generate_checksum(struct ospf_lsa_header *lsa, const u8 *body);
u16 lsa_verify_checksum(const void *lsa_n, int lsa_len);
void lsasum_calculate(struct ospf_lsa_header *header, void *body);
u16 lsasum_check(struct ospf_lsa_header *h, void *body, int update);
#define CMP_NEWER 1
#define CMP_SAME 0
#define CMP_OLDER -1