aboutsummaryrefslogtreecommitdiffstats
path: root/src/vnet/mpls/mpls_features.c
blob: 5f07833b6a38ed195487372ed9f2baf0419dd14d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
/*
 * mpls_features.c: MPLS input and output features
 *
 * Copyright (c) 2016 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <vnet/mpls/mpls.h>

always_inline uword
mpls_terminate (vlib_main_t * vm,
                vlib_node_runtime_t * node,
                vlib_frame_t * frame,
                int error_code)
{
  u32 * buffers = vlib_frame_vector_args (frame);
  uword n_packets = frame->n_vectors;

  vlib_error_drop_buffers (vm, node,
                           buffers,
                           /* stride */ 1,
                           n_packets,
                           /* next */ 0,
                           mpls_input_node.index,
                           error_code);

  return n_packets;
}

VLIB_NODE_FN (mpls_punt_node) (vlib_main_t * vm,
           vlib_node_runtime_t * node,
           vlib_frame_t * frame)
{
    return (mpls_terminate(vm, node, frame, MPLS_ERROR_PUNT));
}

VLIB_REGISTER_NODE (mpls_punt_node) = {
  .name = "mpls-punt",
  .vector_size = sizeof (u32),

  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-punt",
  },
};

VLIB_NODE_FN (mpls_drop_node) (vlib_main_t * vm,
           vlib_node_runtime_t * node,
           vlib_frame_t * frame)
{
    return (mpls_terminate(vm, node, frame, MPLS_ERROR_DROP));
}

VLIB_REGISTER_NODE (mpls_drop_node) = {
  .name = "mpls-drop",
  .vector_size = sizeof (u32),

  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};

VLIB_NODE_FN (mpls_not_enabled_node) (vlib_main_t * vm,
                  vlib_node_runtime_t * node,
                  vlib_frame_t * frame)
{
    return (mpls_terminate(vm, node, frame, MPLS_ERROR_NOT_ENABLED));
}

VLIB_REGISTER_NODE (mpls_not_enabled_node) = {
  .name = "mpls-not-enabled",
  .vector_size = sizeof (u32),

  .n_next_nodes = 1,
  .next_nodes = {
    [0] = "error-drop",
  },
};

VNET_FEATURE_ARC_INIT (mpls_input, static) =
{
  .arc_name  = "mpls-input",
  .start_nodes = VNET_FEATURES ("mpls-input"),
  .last_in_arc = "mpls-lookup",
  .arc_index_ptr = &mpls_main.input_feature_arc_index,
};

VNET_FEATURE_INIT (mpls_not_enabled, static) = {
  .arc_name = "mpls-input",
  .node_name = "mpls-not-enabled",
  .runs_before = VNET_FEATURES ("mpls-lookup"),
};

VNET_FEATURE_INIT (mpls_lookup, static) = {
  .arc_name = "mpls-input",
  .node_name = "mpls-lookup",
  .runs_before = VNET_FEATURES (0), /* not before any other features */
};

VNET_FEATURE_ARC_INIT (mpls_output, static) =
{
  .arc_name  = "mpls-output",
  .start_nodes = VNET_FEATURES ("mpls-output", "mpls-midchain"),
  .last_in_arc = "interface-output",
  .arc_index_ptr = &mpls_main.output_feature_arc_index,
};

/* Built-in ip4 tx feature path definition */
VNET_FEATURE_INIT (mpls_interface_output, static) = {
  .arc_name = "mpls-output",
  .node_name = "interface-output",
  .runs_before = 0, /* not before any other features */
};

static clib_error_t *
mpls_sw_interface_add_del (vnet_main_t * vnm,
                           u32 sw_if_index,
                           u32 is_add)
{
  mpls_main_t * mm = &mpls_main;

  vec_validate_init_empty (mm->mpls_enabled_by_sw_if_index, sw_if_index, 0);
  vec_validate_init_empty (mm->fib_index_by_sw_if_index, sw_if_index, 0);

  vnet_feature_enable_disable ("mpls-input", "mpls-not-enabled", sw_if_index,
			       is_add, 0, 0);

  return /* no error */ 0;
}

VNET_SW_INTERFACE_ADD_DEL_FUNCTION (mpls_sw_interface_add_del);