diff options
| author |   Neale Ranns <neale.ranns@cisco.com> | 2018-09-24 23:38:37 -0700 |
|---|---|---|
| committer |   Damjan Marion <dmarion@me.com> | 2018-09-25 11:59:37 +0000 |
| commit | fe4e48f617f3e0f62880adebdcfb5989aa4e6db7 (patch) | |
| tree | b5d0778bc798a9119760992f878ff2e3666ea1ee /src/vnet/bier/bier_imp_node.c | |
| parent | 608f95cddc4e1e78b4d3ac3b2c3f1ae86f1fa632 (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.c | 59 |
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) |