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authorMaria Matejka <mq@ucw.cz>2022-05-31 12:51:34 +0200
committerMaria Matejka <mq@ucw.cz>2022-05-31 12:51:34 +0200
commitea109ce3e3474dd10d7592c44d2371b794f5c867 (patch)
treebfd5e54e1fa8f50efd5456a54dc1ebf508c1804c /proto/bgp/packets.c
parent1493695c6ba2b169523f7c2097fac8e8343352fe (diff)
parent4fe9881d625f10e44109a649e369a413bd98de71 (diff)
Merge commit '4fe9881d625f10e44109a649e369a413bd98de71' into haugesund
Diffstat (limited to 'proto/bgp/packets.c')
-rw-r--r--proto/bgp/packets.c47
1 files changed, 17 insertions, 30 deletions
diff --git a/proto/bgp/packets.c b/proto/bgp/packets.c
index 9e65670d..ce2848c0 100644
--- a/proto/bgp/packets.c
+++ b/proto/bgp/packets.c
@@ -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
@@ -1446,12 +1449,7 @@ 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;
@@ -1474,19 +1472,8 @@ 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);