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Code Releases Activity

Moved hostentry to eattr

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This commit is contained in:
Maria Matejka
2022-05-15 15:53:35 +02:00
parent f15f2fcee7
commit 4fe9881d62
10 changed files with 161 additions and 125 deletions
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47
proto/bgp/packets.c
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@@ -986,27 +986,24 @@ bgp_apply_next_hop(struct bgp_parse_state *s, rta *a, ip_addr gw, ip_addr ll)
WITHDRAW(BAD_NEXT_HOP " - zero address");
rtable *tab = ipa_is_ip4(gw) ? c->igp_table_ip4 : c->igp_table_ip6;
s->hostentry = rt_get_hostentry(tab, gw, ll, c->c.table);
if (!s->mpls)
rta_apply_hostentry(a, s->hostentry);
/* With MPLS, hostentry is applied later in bgp_apply_mpls_labels() */
if (s->mpls)
{
u32 labels[BGP_MPLS_MAX];
ea_set_hostentry(&a->eattrs, c->c.table, tab, gw, ll, BGP_MPLS_MAX, labels);
}
else
ea_set_hostentry(&a->eattrs, c->c.table, tab, gw, ll, 0, NULL);
}
}
static void
bgp_apply_mpls_labels(struct bgp_parse_state *s, rta *a)
bgp_apply_mpls_labels(struct bgp_parse_state *s, rta *a, u32 lnum, u32 labels[lnum])
{
u32 *labels = (u32 *) s->mpls_labels->data;
u32 lnum = s->mpls_labels->length / sizeof(u32);
if (lnum > MPLS_MAX_LABEL_STACK)
{
REPORT("Too many MPLS labels ($u)", lnum);
a->dest = RTD_UNREACHABLE;
a->hostentry = NULL;
ea_unset_attr(&a->eattrs, 0, &ea_gen_nexthop);
return;
}
@@ -1029,7 +1026,13 @@ bgp_apply_mpls_labels(struct bgp_parse_state *s, rta *a)
nh.nhad.ad.length = sizeof nh.nhad + lnum * sizeof(u32);
}
else /* GW_RECURSIVE */
rta_apply_hostentry(a, s->hostentry);
{
eattr *e = ea_find(a->eattrs, &ea_gen_hostentry);
ASSERT_DIE(e);
struct hostentry_adata *head = (void *) e->u.ptr;
memcpy(&head->labels, labels, lnum * sizeof(u32));
head->ad.length = (void *)(&head->labels[lnum]) - (void *) head->ad.data;
}
}
static void
@@ -1445,12 +1448,7 @@ bgp_encode_mpls_labels(struct bgp_write_state *s UNUSED, const adata *mpls, byte
static void
bgp_decode_mpls_labels(struct bgp_parse_state *s, byte **pos, uint *len, uint *pxlen, rta *a)
{
struct {
struct adata ad;
u32 labels[BGP_MPLS_MAX];
} labels_adata;
u32 *labels = labels_adata.labels;
u32 labels[BGP_MPLS_MAX];
u32 label;
uint lnum = 0;
@@ -1473,19 +1471,8 @@ bgp_decode_mpls_labels(struct bgp_parse_state *s, byte **pos, uint *len, uint *p
if (!a)
return;
labels_adata.ad.length = lnum * sizeof(u32);
/* Attach MPLS attribute unless we already have one */
if (!s->mpls_labels)
ea_set_attr(&(a->eattrs),
EA_LITERAL_DIRECT_ADATA(&ea_mpls_labels, 0,
(s->mpls_labels = tmp_store_adata(labels, BGP_MPLS_MAX * sizeof(u32)))));
else
/* Overwrite data in the attribute */
memcpy(s->mpls_labels, &labels_adata, sizeof labels_adata);
/* Update next hop entry in rta */
bgp_apply_mpls_labels(s, a);
bgp_apply_mpls_labels(s, a, lnum, labels);
/* Attributes were changed, invalidate cached entry */
rta_free(s->cached_rta);