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authorNeale Ranns <neale.ranns@cisco.com>2018-09-24 23:38:37 -0700
committerDamjan Marion <dmarion@me.com>2018-09-25 11:59:37 +0000
commitfe4e48f617f3e0f62880adebdcfb5989aa4e6db7 (patch)
treeb5d0778bc798a9119760992f878ff2e3666ea1ee /src/vnet/bier/bier_imp_node.c
parent608f95cddc4e1e78b4d3ac3b2c3f1ae86f1fa632 (diff)
BIER; bi-dir to/from underlay
set and check a special RX interface value as the packet enters and exits a BIER domain Change-Id: I5ff2f0e2d1b3ce0f3598b935f518fc11eb0896ee Signed-off-by: Neale Ranns <neale.ranns@cisco.com>
Diffstat (limited to 'src/vnet/bier/bier_imp_node.c')
-rw-r--r--src/vnet/bier/bier_imp_node.c59
1 files changed, 34 insertions, 25 deletions
diff --git a/src/vnet/bier/bier_imp_node.c b/src/vnet/bier/bier_imp_node.c
index 9c09d6722bc..0f1820b4028 100644
--- a/src/vnet/bier/bier_imp_node.c
+++ b/src/vnet/bier/bier_imp_node.c
@@ -120,30 +120,39 @@ bier_imp_dpo_inline (vlib_main_t * vm,
vlib_buffer_advance(b0, -(sizeof(bier_hdr_t) +
bier_hdr_len_id_to_num_bytes(bimp0->bi_tbl.bti_hdr_len)));
hdr0 = vlib_buffer_get_current(b0);
- clib_memcpy(hdr0, &bimp0->bi_hdr,
- (sizeof(bier_hdr_t) +
- bier_hdr_len_id_to_num_bytes(bimp0->bi_tbl.bti_hdr_len)));
- /*
- * Fixup the entropy and protocol, both of which have a
- * zero value post the paint job
- */
- hdr0->bh_oam_dscp_proto |=
- clib_host_to_net_u16(bproto << BIER_HDR_PROTO_FIELD_SHIFT);
- hdr0->bh_first_word |=
- clib_host_to_net_u32((vnet_buffer(b0)->ip.flow_hash &
- BIER_HDR_ENTROPY_FIELD_MASK) <<
- BIER_HDR_ENTROPY_FIELD_SHIFT);
-
- /*
- * use TTL 64 for the post enacp MPLS label/BIFT-ID
- * this we be decremeted in bier_output node.
- */
- vnet_buffer(b0)->mpls.ttl = 65;
-
- /* next node */
- next0 = bimp0->bi_dpo[fproto].dpoi_next_node;
- vnet_buffer(b0)->ip.adj_index[VLIB_TX] =
- bimp0->bi_dpo[fproto].dpoi_index;
+
+ /* RPF check */
+ if (PREDICT_FALSE(BIER_RX_ITF == vnet_buffer(b0)->ip.adj_index[VLIB_RX]))
+ {
+ next0 = 0;
+ }
+ else
+ {
+ clib_memcpy(hdr0, &bimp0->bi_hdr,
+ (sizeof(bier_hdr_t) +
+ bier_hdr_len_id_to_num_bytes(bimp0->bi_tbl.bti_hdr_len)));
+ /*
+ * Fixup the entropy and protocol, both of which have a
+ * zero value post the paint job
+ */
+ hdr0->bh_oam_dscp_proto |=
+ clib_host_to_net_u16(bproto << BIER_HDR_PROTO_FIELD_SHIFT);
+ hdr0->bh_first_word |=
+ clib_host_to_net_u32((vnet_buffer(b0)->ip.flow_hash &
+ BIER_HDR_ENTROPY_FIELD_MASK) <<
+ BIER_HDR_ENTROPY_FIELD_SHIFT);
+
+ /*
+ * use TTL 64 for the post enacp MPLS label/BIFT-ID
+ * this we be decremeted in bier_output node.
+ */
+ vnet_buffer(b0)->mpls.ttl = 65;
+
+ /* next node */
+ next0 = bimp0->bi_dpo[fproto].dpoi_next_node;
+ vnet_buffer(b0)->ip.adj_index[VLIB_TX] =
+ bimp0->bi_dpo[fproto].dpoi_index;
+ }
if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
{
@@ -194,7 +203,7 @@ VLIB_REGISTER_NODE (bier_imp_ip4_node) = {
.format_trace = format_bier_imp_trace,
.n_next_nodes = 1,
.next_nodes = {
- [0] = "error-drop",
+ [0] = "bier-drop",
}
};
VLIB_NODE_FUNCTION_MULTIARCH (bier_imp_ip4_node, bier_imp_ip4)