summaryrefslogtreecommitdiffstats
path: root/hicn-plugin/src/faces/app/face_prod_node.c
blob: a9fbfa7bfb4e0f9b15d82a14d06c314da148707b (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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
/*
 * Copyright (c) 2017-2019 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.
 */

/**
 * @file
 *
 * @brief Application interface node
 *
 * This node runs after the device-input node and perfoms some safety checks in
 * order to avoid unespected interest and data (i.e., hICN packets whose name do
 * not contain the prefix associated to the application face)
 */

#include "face_prod.h"
#include "../../hicn_api.h"
#include "../../mgmt.h"

static __clib_unused char *face_prod_input_error_strings[] = {
#define _(sym, string) string,
  foreach_hicnfwd_error
#undef _
};

/* Node context data */
typedef struct hicn_face_prod_runtime_s
{
  int id;
} hicn_face_prod_runtime_t;

typedef struct
{
  u32 next_index;
  u32 sw_if_index;
} hicn_face_prod_input_trace_t;

typedef enum
{
  HICN_FACE_PROD_NEXT_DATA_IP4,
  HICN_FACE_PROD_NEXT_DATA_IP6,
  HICN_FACE_PROD_NEXT_ERROR_DROP,
  HICN_FACE_PROD_N_NEXT,
} hicn_face_prod_next_t;

vlib_node_registration_t hicn_face_prod_input_node;

static __clib_unused u8 *
format_face_prod_input_trace (u8 * s, va_list * args)
{
  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  hicn_face_prod_input_trace_t *t =
    va_arg (*args, hicn_face_prod_input_trace_t *);
  CLIB_UNUSED (u32 indent) = format_get_indent (s);

  s = format (s, "prod-face: sw_if_index %d next-index %d",
	      t->sw_if_index, t->next_index);
  return s;
}

static_always_inline int
match_ip4_name (u32 * name, hicn_prefix_t * prefix)
{
  u32 xor = 0;

  xor = *name & prefix->name.ip4.data_u32;

  return xor == prefix->name.ip4.data_u32;
}

static_always_inline int
match_ip6_name (u32x4 * name, hicn_prefix_t * prefix)
{
  union
  {
    u32x4 as_u32x4;
    u64 as_u64[2];
    u32 as_u32[4];
  } xor_sum __attribute__ ((aligned (sizeof (u32x4))));

#ifdef CLIB_HAVE_VEC128
  if (U32X4_ALIGNED (name))
    {				//SSE can't handle unaligned data
      xor_sum.as_u32x4 = *((u32x4 *) name) &
	UNION_CAST (prefix->name.ip6.as_u64[0], u32x4);
    }
  else
#endif /* CLIB_HAVE_VEC128 */
    {
      xor_sum.as_u64[0] = ((u64 *) name)[0] & prefix->name.ip6.as_u64[0];
      xor_sum.as_u64[1] = ((u64 *) name)[1] & prefix->name.ip6.as_u64[1];
    }

  return (xor_sum.as_u64[0] == prefix->name.ip6.as_u64[0]) &&
    (xor_sum.as_u64[1] == prefix->name.ip6.as_u64[1]);
}

static_always_inline u32
hicn_face_prod_next_from_data_hdr (vlib_node_runtime_t * node,
				   vlib_buffer_t * b, hicn_prefix_t * prefix)
{
  u8 *ptr = vlib_buffer_get_current (b);
  u8 v = *ptr & 0xf0;
  int match_res = 1;

  if (PREDICT_TRUE (v == 0x40 && ip46_address_is_ip4 (&prefix->name)))
    {
      match_res = match_ip4_name ((u32 *) & (ptr[12]), prefix);
    }
  else if (PREDICT_TRUE (v == 0x60 && !ip46_address_is_ip4 (&prefix->name)))
    {
      match_res = match_ip6_name ((u32x4 *) & (ptr[8]), prefix);
    }

  return match_res ? HICN_FACE_PROD_NEXT_DATA_IP4 + (v ==
						     0x60) :
    HICN_FACE_PROD_NEXT_ERROR_DROP;
}

static_always_inline void
hicn_face_prod_trace_buffer (vlib_main_t * vm, vlib_node_runtime_t * node,
			     u32 swif, vlib_buffer_t * b, u32 next)
{
  if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
		     (b->flags & VLIB_BUFFER_IS_TRACED)))
    {
      hicn_face_prod_input_trace_t *t =
	vlib_add_trace (vm, node, b, sizeof (*t));
      t->next_index = next;
      t->sw_if_index = swif;
    }
}

static uword
hicn_face_prod_input_node_fn (vlib_main_t * vm,
			      vlib_node_runtime_t * node,
			      vlib_frame_t * frame)
{
  u32 n_left_from, *from, *to_next;
  hicn_face_prod_next_t next_index;
  vl_api_hicn_api_node_stats_get_reply_t stats = { 0 };

  from = vlib_frame_vector_args (frame);
  n_left_from = frame->n_vectors;
  next_index = node->cached_next_index;

  while (n_left_from > 0)
    {
      u32 n_left_to_next;
      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);

      while (n_left_from >= 8 && n_left_to_next >= 4)
	{
	  vlib_buffer_t *b0, *b1, *b2, *b3;
	  u32 bi0, bi1, bi2, bi3;
	  hicn_face_prod_state_t *prod_face0 = NULL;
	  hicn_face_prod_state_t *prod_face1 = NULL;
	  hicn_face_prod_state_t *prod_face2 = NULL;
	  hicn_face_prod_state_t *prod_face3 = NULL;
	  u32 next0, next1, next2, next3;

	  {
	    vlib_buffer_t *b4, *b5, *b6, *b7;
	    b4 = vlib_get_buffer (vm, from[4]);
	    b5 = vlib_get_buffer (vm, from[5]);
	    b6 = vlib_get_buffer (vm, from[6]);
	    b7 = vlib_get_buffer (vm, from[7]);
	    CLIB_PREFETCH (b4, CLIB_CACHE_LINE_BYTES, STORE);
	    CLIB_PREFETCH (b5, CLIB_CACHE_LINE_BYTES, STORE);
	    CLIB_PREFETCH (b6, CLIB_CACHE_LINE_BYTES, STORE);
	    CLIB_PREFETCH (b7, CLIB_CACHE_LINE_BYTES, STORE);
	  }

	  bi0 = from[0];
	  bi1 = from[1];
	  bi2 = from[2];
	  bi3 = from[3];

	  from += 4;
	  n_left_from -= 4;
	  to_next[0] = bi0;
	  to_next[1] = bi1;
	  to_next[2] = bi2;
	  to_next[3] = bi3;

	  to_next += 4;
	  n_left_to_next -= 4;

	  b0 = vlib_get_buffer (vm, bi0);
	  b1 = vlib_get_buffer (vm, bi1);
	  b2 = vlib_get_buffer (vm, bi2);
	  b3 = vlib_get_buffer (vm, bi3);

	  prod_face0 =
	    &face_state_vec[vnet_buffer (b0)->sw_if_index[VLIB_RX]];
	  prod_face1 =
	    &face_state_vec[vnet_buffer (b1)->sw_if_index[VLIB_RX]];
	  prod_face2 =
	    &face_state_vec[vnet_buffer (b2)->sw_if_index[VLIB_RX]];
	  prod_face3 =
	    &face_state_vec[vnet_buffer (b3)->sw_if_index[VLIB_RX]];

	  next0 =
	    hicn_face_prod_next_from_data_hdr (node, b0, &prod_face0->prefix);
	  next1 =
	    hicn_face_prod_next_from_data_hdr (node, b1, &prod_face1->prefix);
	  next2 =
	    hicn_face_prod_next_from_data_hdr (node, b2, &prod_face2->prefix);
	  next3 =
	    hicn_face_prod_next_from_data_hdr (node, b3, &prod_face3->prefix);
	  stats.pkts_data_count += 4;

	  /* trace */
	  hicn_face_prod_trace_buffer (vm, node,
				       vnet_buffer (b0)->sw_if_index[VLIB_RX],
				       b0, next0);
	  hicn_face_prod_trace_buffer (vm, node,
				       vnet_buffer (b1)->sw_if_index[VLIB_RX],
				       b1, next1);
	  hicn_face_prod_trace_buffer (vm, node,
				       vnet_buffer (b2)->sw_if_index[VLIB_RX],
				       b2, next2);
	  hicn_face_prod_trace_buffer (vm, node,
				       vnet_buffer (b3)->sw_if_index[VLIB_RX],
				       b3, next3);

	  /* enqueue */
	  vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
					   n_left_to_next, bi0, bi1, bi2, bi3,
					   next0, next1, next2, next3);

	  stats.pkts_processed += 4;

	}

      while (n_left_from > 0 && n_left_to_next > 0)
	{
	  vlib_buffer_t *b0;
	  u32 bi0, swif;
	  hicn_face_prod_state_t *prod_face = NULL;
	  u32 next0;

	  if (n_left_from > 1)
	    {
	      vlib_buffer_t *b1;
	      b1 = vlib_get_buffer (vm, from[1]);
	      CLIB_PREFETCH (b1, CLIB_CACHE_LINE_BYTES, STORE);
	    }

	  bi0 = from[0];
	  from += 1;
	  n_left_from -= 1;
	  to_next[0] = bi0;
	  to_next += 1;
	  n_left_to_next -= 1;

	  b0 = vlib_get_buffer (vm, bi0);
	  swif = vnet_buffer (b0)->sw_if_index[VLIB_RX];
	  prod_face = &face_state_vec[swif];

	  next0 =
	    hicn_face_prod_next_from_data_hdr (node, b0, &prod_face->prefix);
	  stats.pkts_data_count++;

	  /* trace */
	  hicn_face_prod_trace_buffer (vm, node,
				       vnet_buffer (b0)->sw_if_index[VLIB_RX],
				       b0, next0);

	  /* enqueue */
	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
					   n_left_to_next, bi0, next0);

	  stats.pkts_processed += 1;

	}

      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
    }

  vlib_node_increment_counter (vm, node->node_index,
			       HICNFWD_ERROR_PROCESSED, stats.pkts_processed);
  vlib_node_increment_counter (vm, node->node_index, HICNFWD_ERROR_DATAS,
			       stats.pkts_data_count);

  return (frame->n_vectors);
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE(hicn_face_prod_input_node) =
{
  .function = hicn_face_prod_input_node_fn,
  .name = "hicn-face-prod-input",
  .vector_size = sizeof(u32),
  .format_trace = format_face_prod_input_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(face_prod_input_error_strings),
  .error_strings = face_prod_input_error_strings,
  .n_next_nodes = HICN_FACE_PROD_N_NEXT,
  .next_nodes =
  {
    [HICN_FACE_PROD_NEXT_DATA_IP4] = "hicn-face-ip4-input",
    [HICN_FACE_PROD_NEXT_DATA_IP6] = "hicn-face-ip6-input",
    [HICN_FACE_PROD_NEXT_ERROR_DROP] = "error-drop",
  },
};
/* *INDENT-ON* */


/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables: eval: (c-set-style "gnu") End:
 */