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zebra: update nhlfe when the outgoing labels differ

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Because the nhlfe label stack may contain more than one
label, ensure to copy all labels.

Co-developed-by: Dmytro Shytyi <dmytro.shytyi@6wind.com>
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
Signed-off-by: Dmytro Shytyi <dmytro.shytyi@6wind.com>
This commit is contained in:
Philippe Guibert 2022-12-22 16:53:33 +01:00 committed by Dmytro Shytyi
parent e9c7b5dee2
commit 229da537e6
1 changed files with 26 additions and 1 deletions
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27
zebra/zebra_mpls.c
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@ -37,6 +37,7 @@
DEFINE_MTYPE_STATIC(ZEBRA, LSP, "MPLS LSP object");
DEFINE_MTYPE_STATIC(ZEBRA, FEC, "MPLS FEC object");
DEFINE_MTYPE_STATIC(ZEBRA, NHLFE, "MPLS nexthop object");
DEFINE_MTYPE_STATIC(ZEBRA, NH_LABEL, "Nexthop label");
bool mpls_enabled;
bool mpls_pw_reach_strict; /* Strict reachability checking */
@ -1452,7 +1453,31 @@ static int nhlfe_del(struct zebra_nhlfe *nhlfe)
static void nhlfe_out_label_update(struct zebra_nhlfe *nhlfe,
struct mpls_label_stack *nh_label)
{
nhlfe->nexthop->nh_label->label[0] = nh_label->label[0];
struct mpls_label_stack *nh_label_tmp;
int i;
/* Enforce limit on label stack size */
if (nh_label->num_labels > MPLS_MAX_LABELS)
nh_label->num_labels = MPLS_MAX_LABELS;
/* Resize the array to accommodate the new label stack */
if (nh_label->num_labels > nhlfe->nexthop->nh_label->num_labels) {
nh_label_tmp = XREALLOC(MTYPE_NH_LABEL, nhlfe->nexthop->nh_label,
sizeof(struct mpls_label_stack) +
nh_label->num_labels *
sizeof(mpls_label_t));
if (nh_label_tmp) {
nhlfe->nexthop->nh_label = nh_label_tmp;
nhlfe->nexthop->nh_label->num_labels =
nh_label->num_labels;
} else
nh_label->num_labels =
nhlfe->nexthop->nh_label->num_labels;
}
/* Copy the label stack into the array */
for (i = 0; i < nh_label->num_labels; i++)
nhlfe->nexthop->nh_label->label[i] = nh_label->label[i];
}
static int mpls_lsp_uninstall_all(struct hash *lsp_table, struct zebra_lsp *lsp,