4 * Copyright (c) 2012-2014 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vlib/vlib.h>
19 #include <vnet/pg/pg.h>
20 #include <vnet/mpls/mpls.h>
21 #include <vnet/feature/feature.h>
25 u32 label_net_byte_order;
28 #define foreach_mpls_input_next \
29 _(DROP, "error-drop") \
30 _(LOOKUP, "mpls-lookup")
33 #define _(s,n) MPLS_INPUT_NEXT_##s,
34 foreach_mpls_input_next
40 format_mpls_input_trace (u8 * s, va_list * args)
42 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
43 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
44 mpls_input_trace_t * t = va_arg (*args, mpls_input_trace_t *);
48 label = clib_net_to_host_u32(t->label_net_byte_order);
50 #define _(a,b) if (t->next_index == MPLS_INPUT_NEXT_##a) next_name = b;
51 foreach_mpls_input_next;
54 s = format (s, "MPLS: next %s[%d] label %d ttl %d exp %d",
55 next_name, t->next_index,
56 vnet_mpls_uc_get_label(label),
57 vnet_mpls_uc_get_ttl(label),
58 vnet_mpls_uc_get_exp(label));
65 u32 last_inner_fib_index;
66 u32 last_outer_fib_index;
67 mpls_main_t * mpls_main;
68 } mpls_input_runtime_t;
71 mpls_input_inline (vlib_main_t * vm,
72 vlib_node_runtime_t * node,
73 vlib_frame_t * from_frame)
75 u32 n_left_from, next_index, * from, * to_next;
76 mpls_main_t * mm = &mpls_main;
77 u32 thread_index = vlib_get_thread_index();
78 vlib_simple_counter_main_t * cm;
79 vnet_main_t * vnm = vnet_get_main();
81 from = vlib_frame_vector_args (from_frame);
82 n_left_from = from_frame->n_vectors;
84 next_index = node->cached_next_index;
86 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
87 VNET_INTERFACE_COUNTER_MPLS);
89 while (n_left_from > 0)
93 vlib_get_next_frame (vm, node, next_index,
94 to_next, n_left_to_next);
96 while (n_left_from >= 4 && n_left_to_next >= 2)
98 u32 bi0, next0, sw_if_index0;
99 u32 bi1, next1, sw_if_index1;
100 vlib_buffer_t *b0, *b1;
103 /* Prefetch next iteration. */
105 vlib_buffer_t * p2, * p3;
107 p2 = vlib_get_buffer (vm, from[2]);
108 p3 = vlib_get_buffer (vm, from[3]);
110 vlib_prefetch_buffer_header (p2, LOAD);
111 vlib_prefetch_buffer_header (p3, LOAD);
113 CLIB_PREFETCH (p2->data, sizeof (h0[0]), LOAD);
114 CLIB_PREFETCH (p3->data, sizeof (h1[0]), LOAD);
117 bi0 = to_next[0] = from[0];
118 bi1 = to_next[1] = from[1];
125 b0 = vlib_get_buffer (vm, bi0);
126 b1 = vlib_get_buffer (vm, bi1);
128 h0 = vlib_buffer_get_current (b0);
129 h1 = vlib_buffer_get_current (b1);
131 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
132 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
135 if (PREDICT_FALSE(h0[3] == 0))
137 next0 = MPLS_INPUT_NEXT_DROP;
138 b0->error = node->errors[MPLS_ERROR_TTL_EXPIRED];
142 next0 = MPLS_INPUT_NEXT_LOOKUP;
143 vnet_feature_arc_start(mm->input_feature_arc_index,
144 sw_if_index0, &next0, b0);
145 vlib_increment_simple_counter (cm, thread_index, sw_if_index0, 1);
148 if (PREDICT_FALSE(h1[3] == 0))
150 next1 = MPLS_INPUT_NEXT_DROP;
151 b1->error = node->errors[MPLS_ERROR_TTL_EXPIRED];
155 next1 = MPLS_INPUT_NEXT_LOOKUP;
156 vnet_feature_arc_start(mm->input_feature_arc_index,
157 sw_if_index1, &next1, b1);
158 vlib_increment_simple_counter (cm, thread_index, sw_if_index1, 1);
161 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
163 mpls_input_trace_t *tr = vlib_add_trace (vm, node,
165 tr->next_index = next0;
166 tr->label_net_byte_order = *((u32*)h0);
168 if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
170 mpls_input_trace_t *tr = vlib_add_trace (vm, node,
172 tr->next_index = next1;
173 tr->label_net_byte_order = *((u32*)h1);
176 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
177 to_next, n_left_to_next,
182 while (n_left_from > 0 && n_left_to_next > 0)
184 u32 sw_if_index0, next0, bi0;
195 b0 = vlib_get_buffer (vm, bi0);
196 h0 = vlib_buffer_get_current (b0);
197 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
200 if (PREDICT_FALSE(h0[3] == 0))
202 next0 = MPLS_INPUT_NEXT_DROP;
203 b0->error = node->errors[MPLS_ERROR_TTL_EXPIRED];
207 next0 = MPLS_INPUT_NEXT_LOOKUP;
208 vnet_feature_arc_start(mm->input_feature_arc_index, sw_if_index0, &next0, b0);
209 vlib_increment_simple_counter (cm, thread_index, sw_if_index0, 1);
212 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
214 mpls_input_trace_t *tr = vlib_add_trace (vm, node,
216 tr->next_index = next0;
217 tr->label_net_byte_order = *(u32*)h0;
220 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
221 to_next, n_left_to_next,
225 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
227 vlib_node_increment_counter (vm, mpls_input_node.index,
228 MPLS_ERROR_PKTS_DECAP, from_frame->n_vectors);
229 return from_frame->n_vectors;
232 VLIB_NODE_FN (mpls_input_node) (vlib_main_t * vm,
233 vlib_node_runtime_t * node,
234 vlib_frame_t * from_frame)
236 return mpls_input_inline (vm, node, from_frame);
239 static char * mpls_error_strings[] = {
240 #define mpls_error(n,s) s,
245 VLIB_REGISTER_NODE (mpls_input_node) = {
246 .name = "mpls-input",
247 /* Takes a vector of packets. */
248 .vector_size = sizeof (u32),
250 .runtime_data_bytes = sizeof(mpls_input_runtime_t),
252 .n_errors = MPLS_N_ERROR,
253 .error_strings = mpls_error_strings,
255 .n_next_nodes = MPLS_INPUT_N_NEXT,
257 #define _(s,n) [MPLS_INPUT_NEXT_##s] = n,
258 foreach_mpls_input_next
262 .format_buffer = format_mpls_unicast_header_net_byte_order,
263 .format_trace = format_mpls_input_trace,
266 #ifndef CLIB_MARCH_VARIANT
268 mpls_setup_nodes (vlib_main_t * vm)
272 pn = pg_get_node (mpls_input_node.index);
273 pn->unformat_edit = unformat_pg_mpls_header;
275 ethernet_register_input_type (vm, ETHERNET_TYPE_MPLS,
276 mpls_input_node.index);
279 static clib_error_t * mpls_input_init (vlib_main_t * vm)
281 clib_error_t * error;
283 error = vlib_call_init_function (vm, mpls_init);
285 clib_error_report (error);
287 mpls_setup_nodes (vm);
292 VLIB_INIT_FUNCTION (mpls_input_init);
293 #endif /* CLIB_MARCH_VARIANT */