2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vnet/bier/bier_disp_entry.h>
17 #include <vnet/bier/bier_hdr_inlines.h>
20 * @brief A struct to hold tracing information for the MPLS label imposition
23 typedef struct bier_disp_dispatch_trace_t_
26 * BIER payload protocol used to dispatch
28 bier_hdr_proto_id_t pproto;
31 * RPF-ID packet is tagged with
34 } bier_disp_dispatch_trace_t;
37 bier_disp_dispatch_inline (vlib_main_t * vm,
38 vlib_node_runtime_t * node,
39 vlib_frame_t * from_frame)
41 u32 n_left_from, next_index, * from, * to_next;
43 from = vlib_frame_vector_args (from_frame);
44 n_left_from = from_frame->n_vectors;
46 next_index = node->cached_next_index;
48 while (n_left_from > 0)
52 vlib_get_next_frame(vm, node, next_index, to_next, n_left_to_next);
54 while (n_left_from > 0 && n_left_to_next > 0)
56 bier_hdr_proto_id_t pproto0;
57 bier_disp_entry_t *bde0;
58 u32 next0, bi0, bdei0;
71 b0 = vlib_get_buffer (vm, bi0);
72 bdei0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX];
73 hdr0 = vlib_buffer_get_current(b0);
74 bde0 = bier_disp_entry_get(bdei0);
75 vnet_buffer(b0)->ip.adj_index[VLIB_RX] = BIER_RX_ITF;
78 * header is in network order - flip it, we are about to
82 pproto0 = bier_hdr_get_proto_id(hdr0);
83 entropy0 = bier_hdr_get_entropy(hdr0);
86 * strip the header and copy the entropy value into
87 * the packets flow-hash field
88 * DSCP mumble mumble...
90 vlib_buffer_advance(b0, (vnet_buffer(b0)->mpls.bier.n_bytes +
92 vnet_buffer(b0)->ip.flow_hash = entropy0;
95 * use the payload proto to dispatch to the
96 * correct stacked DPO.
98 dpo0 = &bde0->bde_fwd[pproto0].bde_dpo;
99 next0 = dpo0->dpoi_next_node;
100 vnet_buffer(b0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index;
101 vnet_buffer(b0)->ip.rpf_id = bde0->bde_fwd[pproto0].bde_rpf_id;
103 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
105 bier_disp_dispatch_trace_t *tr =
106 vlib_add_trace (vm, node, b0, sizeof (*tr));
107 tr->pproto = pproto0;
108 tr->rpf_id = vnet_buffer(b0)->ip.rpf_id;
111 vlib_validate_buffer_enqueue_x1(vm, node, next_index, to_next,
112 n_left_to_next, bi0, next0);
114 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
116 return from_frame->n_vectors;
120 format_bier_disp_dispatch_trace (u8 * s, va_list * args)
122 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
123 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
124 bier_disp_dispatch_trace_t * t;
126 t = va_arg (*args, bier_disp_dispatch_trace_t *);
127 s = format (s, "%U", format_bier_hdr_proto, t->pproto);
132 VLIB_NODE_FN (bier_disp_dispatch_node) (vlib_main_t * vm,
133 vlib_node_runtime_t * node,
134 vlib_frame_t * frame)
136 return (bier_disp_dispatch_inline(vm, node, frame));
139 VLIB_REGISTER_NODE (bier_disp_dispatch_node) = {
140 .name = "bier-disp-dispatch",
141 .vector_size = sizeof (u32),
143 .format_trace = format_bier_disp_dispatch_trace,