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ospf6d: use nth_lsdesc() in ospf6_router_lsa_get_nbr_id()

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Improves code readability by reducing pointer casting and arithmetic,
and intendation.

Signed-off-by: Andrew Cooks <acooks.at.bda@gmail.com>
This commit is contained in:
Andrew Cooks 2024-06-10 14:08:12 +10:00
parent 8ea50a44b5
commit b3f72964f2
1 changed files with 8 additions and 29 deletions
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37
ospf6d/ospf6_intra.c
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@ -44,41 +44,20 @@ uint32_t conf_debug_ospf6_brouter_specific_area_id;
/* RFC2740 3.4.3.1 Router-LSA */
/******************************/
/* OSPF6_LSTYPE_ROUTER */
static char *ospf6_router_lsa_get_nbr_id(struct ospf6_lsa *lsa, char *buf,
int buflen, int pos)
{
struct ospf6_router_lsa *router_lsa;
struct ospf6_router_lsdesc *lsdesc;
char *start, *end;
char buf1[INET_ADDRSTRLEN], buf2[INET_ADDRSTRLEN];
struct ospf6_router_lsdesc *lsdesc = nth_lsdesc(lsa->header, pos);
if (lsa) {
router_lsa = (struct ospf6_router_lsa
*)((char *)lsa->header
+ sizeof(struct ospf6_lsa_header));
start = (char *)router_lsa + sizeof(struct ospf6_router_lsa);
end = (char *)lsa->header + ntohs(lsa->header->length);
if (!lsdesc || !buf || buflen < (2 + 2 * INET_ADDRSTRLEN))
return NULL;
lsdesc = (struct ospf6_router_lsdesc
*)(start
+ pos * (sizeof(struct
ospf6_router_lsdesc)));
if ((char *)lsdesc + sizeof(struct ospf6_router_lsdesc)
<= end) {
if (buf && (buflen > INET_ADDRSTRLEN * 2)) {
inet_ntop(AF_INET,
&lsdesc->neighbor_interface_id, buf1,
sizeof(buf1));
inet_ntop(AF_INET, &lsdesc->neighbor_router_id,
buf2, sizeof(buf2));
snprintf(buf, buflen, "%s/%s", buf2, buf1);
return buf;
}
}
}
return NULL;
inet_ntop(AF_INET, &lsdesc->neighbor_interface_id, buf1, sizeof(buf1));
inet_ntop(AF_INET, &lsdesc->neighbor_router_id, buf2, sizeof(buf2));
snprintf(buf, buflen, "%s/%s", buf2, buf1);
return buf;
}
static int ospf6_router_lsa_show(struct vty *vty, struct ospf6_lsa *lsa,