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zebra: fix installation of LDP labels on static routes

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If the ifindex of a nexthop is not zero, we can't assume that its type is
NEXTHOP_TYPE_IPV4_IFINDEX or NEXTHOP_TYPE_IPV6_IFINDEX. Nexthops of type
NEXTHOP_TYPE_IPV[46] can have their ifindex set by the nexthop_active()
function.

With that said, we need to me more flexible when comparing nexthops
on mpls_ftn_update() to make sure that we'll always find the correct
route/nexthop to update.

Regression introduced by commit 88d88a ("zebra/ldpd: allow MPLS ECMP on
unnumbered interfaces") and found by ANVL.

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
This commit is contained in:
Renato Westphal 2017-02-07 09:47:37 -02:00
parent 8cb1fc4537
commit 4312ff1c28
1 changed files with 9 additions and 5 deletions
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14
zebra/zebra_mpls.c
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@ -1308,22 +1308,26 @@ mpls_ftn_update (int add, struct zebra_vrf *zvrf, enum lsp_types_t type,
for (nexthop = rib->nexthop; nexthop; nexthop = nexthop->next)
{
if (nexthop->type != gtype)
continue;
switch (gtype)
switch (nexthop->type)
{
case NEXTHOP_TYPE_IPV4:
case NEXTHOP_TYPE_IPV4_IFINDEX:
if (gtype != NEXTHOP_TYPE_IPV4 && gtype != NEXTHOP_TYPE_IPV4_IFINDEX)
continue;
if (! IPV4_ADDR_SAME (&nexthop->gate.ipv4, &gate->ipv4))
continue;
if (gtype == NEXTHOP_TYPE_IPV4_IFINDEX && nexthop->ifindex != ifindex)
if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX &&
nexthop->ifindex != ifindex)
continue;
goto found;
case NEXTHOP_TYPE_IPV6:
case NEXTHOP_TYPE_IPV6_IFINDEX:
if (gtype != NEXTHOP_TYPE_IPV6 && gtype != NEXTHOP_TYPE_IPV6_IFINDEX)
continue;
if (! IPV6_ADDR_SAME (&nexthop->gate.ipv6, &gate->ipv6))
continue;
if (gtype == NEXTHOP_TYPE_IPV6_IFINDEX && nexthop->ifindex != ifindex)
if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX &&
nexthop->ifindex != ifindex)
continue;
goto found;
default: