diff options
Diffstat (limited to 'ospf6d/ospf6_lsa.c')
| -rw-r--r-- | ospf6d/ospf6_lsa.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/ospf6d/ospf6_lsa.c b/ospf6d/ospf6_lsa.c index d8d13d4b4b..de04391b6b 100644 --- a/ospf6d/ospf6_lsa.c +++ b/ospf6d/ospf6_lsa.c @@ -37,6 +37,37 @@ DEFINE_MTYPE_STATIC(OSPF6D, OSPF6_LSA, "OSPF6 LSA"); DEFINE_MTYPE_STATIC(OSPF6D, OSPF6_LSA_HEADER, "OSPF6 LSA header"); DEFINE_MTYPE_STATIC(OSPF6D, OSPF6_LSA_SUMMARY, "OSPF6 LSA summary"); +const uint8_t ospf6_lsa_min_size[OSPF6_LSTYPE_SIZE] = { + [OSPF6_LSTYPE_UNKNOWN] = 0, + [0x00ff & OSPF6_LSTYPE_ROUTER] = OSPF6_ROUTER_LSA_MIN_SIZE, + [0x00ff & OSPF6_LSTYPE_NETWORK] = OSPF6_NETWORK_LSA_MIN_SIZE, + [0x00ff & OSPF6_LSTYPE_INTER_PREFIX] = OSPF6_INTER_PREFIX_LSA_MIN_SIZE, + [0x00ff & OSPF6_LSTYPE_INTER_ROUTER] = OSPF6_INTER_ROUTER_LSA_FIX_SIZE, + [0x00ff & OSPF6_LSTYPE_AS_EXTERNAL] = OSPF6_AS_EXTERNAL_LSA_MIN_SIZE, + [0x00ff & OSPF6_LSTYPE_GROUP_MEMBERSHIP] = 0, /* Unused */ + [0x00ff & OSPF6_LSTYPE_TYPE_7] = OSPF6_AS_EXTERNAL_LSA_MIN_SIZE, + [0x00ff & OSPF6_LSTYPE_LINK] = OSPF6_LINK_LSA_MIN_SIZE, + [0x00ff & OSPF6_LSTYPE_INTRA_PREFIX] = OSPF6_INTRA_PREFIX_LSA_MIN_SIZE, + [0x00ff & OSPF6_LSTYPE_GRACE_LSA] = 0 +}; + +void *lsdesc_start_lsa_type(struct ospf6_lsa_header *header, int lsa_type) +{ + uint8_t t = (0x00ff & lsa_type); + + if (t == OSPF6_LSTYPE_UNKNOWN || t >= OSPF6_LSTYPE_SIZE) { + zlog_debug("Cannot get descriptor offset for unknown lsa type 0x%x", + t); + return ospf6_lsa_end(header); + } + return (char *)lsa_after_header(header) + ospf6_lsa_min_size[t]; +} + +void *lsdesc_start(struct ospf6_lsa_header *header) +{ + return lsdesc_start_lsa_type(header, ntohs(header->type)); +} + static struct ospf6_lsa_handler *lsa_handlers[OSPF6_LSTYPE_SIZE]; struct ospf6 *ospf6_get_by_lsdb(struct ospf6_lsa *lsa) |