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bgpd: Check if attributes exists for the path before checking mp_nexthop_len

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CID: 1583901

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
This commit is contained in:
Donatas Abraitis 2024-02-28 08:26:25 +02:00
parent 0f3923d821
commit 3f7ed2c99c
1 changed files with 9 additions and 8 deletions
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17
bgpd/bgp_nht.c
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@ -1068,18 +1068,19 @@ static int make_prefix(int afi, struct bgp_path_info *pi, struct prefix *p)
/* If we receive MP_REACH nexthop with ::(LL) /* If we receive MP_REACH nexthop with ::(LL)
* or LL(LL), use LL address as nexthop cache. * or LL(LL), use LL address as nexthop cache.
*/ */
if (pi->attr->mp_nexthop_len if (pi->attr &&
== BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL pi->attr->mp_nexthop_len ==
&& (IN6_IS_ADDR_UNSPECIFIED( BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL &&
&pi->attr->mp_nexthop_global) (IN6_IS_ADDR_UNSPECIFIED(
|| IN6_IS_ADDR_LINKLOCAL( &pi->attr->mp_nexthop_global) ||
&pi->attr->mp_nexthop_global))) IN6_IS_ADDR_LINKLOCAL(&pi->attr->mp_nexthop_global)))
p->u.prefix6 = pi->attr->mp_nexthop_local; p->u.prefix6 = pi->attr->mp_nexthop_local;
/* If we receive MR_REACH with (GA)::(LL) /* If we receive MR_REACH with (GA)::(LL)
* then check for route-map to choose GA or LL * then check for route-map to choose GA or LL
*/ */
else if (pi->attr->mp_nexthop_len else if (pi->attr &&
== BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL) { pi->attr->mp_nexthop_len ==
BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL) {
if (CHECK_FLAG(pi->attr->nh_flags, if (CHECK_FLAG(pi->attr->nh_flags,
BGP_ATTR_NH_MP_PREFER_GLOBAL)) BGP_ATTR_NH_MP_PREFER_GLOBAL))
p->u.prefix6 = p->u.prefix6 =