aboutsummaryrefslogtreecommitdiffstats
path: root/src/vnet/teib/teib.c
blob: 2edb18c01e670ff2f19d60ff01c8e478ea108142 (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
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
/*
 * teib.h: Tunnel Endpoint Information Base
 *
 * Copyright (c) 2020 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/teib/teib.h>
#include <vnet/fib/fib_table.h>
#include <vnet/adj/adj_midchain.h>
#include <vnet/ip/ip6_ll_table.h>

typedef struct teib_key_t_
{
  ip_address_t tk_peer;
  u8 __pad[3];
  u32 tk_sw_if_index;
} __clib_packed teib_key_t;

STATIC_ASSERT_SIZEOF (teib_key_t, 24);

struct teib_entry_t_
{
  teib_key_t *te_key;
  fib_prefix_t te_nh;
  u32 te_fib_index;
};

typedef struct teib_db_t_
{
  u32 td_n_entries[N_AF];
  uword *td_db;
} teib_db_t;

static teib_db_t teib_db;
static teib_entry_t *teib_pool;
static teib_vft_t *teib_vfts;
static vlib_log_class_t teib_logger;

#define TEIB_NOTIFY(_te, _fn) {                  \
  teib_vft_t *_vft;                              \
  vec_foreach(_vft, teib_vfts) {                 \
    if (_vft->_fn) {                             \
      _vft->_fn(_te);                            \
    }                                            \
  }                                              \
}

#define TEIB_DBG(...)                           \
    vlib_log_debug (teib_logger, __VA_ARGS__);

#define TEIB_INFO(...)                          \
    vlib_log_notice (teib_logger, __VA_ARGS__);

#define TEIB_TE_DBG(_te, _fmt, _args...)                      \
  vlib_log_debug (teib_logger, "[%U]: " _fmt, format_teib_entry, _te - teib_pool, ##_args)
#define TEIB_TE_INFO(_te, _fmt, _args...)                      \
  vlib_log_notice (teib_logger, "[%U]: " _fmt, format_teib_entry, _te - teib_pool, ##_args)

u32
teib_entry_get_sw_if_index (const teib_entry_t * te)
{
  return (te->te_key->tk_sw_if_index);
}

static ip_address_family_t
teib_entry_get_af (const teib_entry_t * te)
{
  return (ip_addr_version (&te->te_key->tk_peer));
}

u32
teib_entry_get_fib_index (const teib_entry_t * te)
{
  return (te->te_fib_index);
}

const ip_address_t *
teib_entry_get_peer (const teib_entry_t * te)
{
  return (&te->te_key->tk_peer);
}

const fib_prefix_t *
teib_entry_get_nh (const teib_entry_t * te)
{
  return (&te->te_nh);
}

void
teib_entry_adj_stack (const teib_entry_t * te, adj_index_t ai)
{
  adj_midchain_delegate_stack (ai, te->te_fib_index, &te->te_nh);
}

teib_entry_t *
teib_entry_get (index_t tei)
{
  return pool_elt_at_index (teib_pool, tei);
}

teib_entry_t *
teib_entry_find (u32 sw_if_index, const ip_address_t * peer)
{
  teib_key_t nk = {
    .tk_peer = *peer,
    .tk_sw_if_index = sw_if_index,
  };
  uword *p;

  p = hash_get_mem (teib_db.td_db, &nk);

  if (NULL != p)
    return teib_entry_get (p[0]);

  return (NULL);
}

teib_entry_t *
teib_entry_find_46 (u32 sw_if_index,
		    fib_protocol_t fproto, const ip46_address_t * peer)
{
  ip_address_t ip;

  ip_address_from_46 (peer, fproto, &ip);

  return (teib_entry_find (sw_if_index, &ip));
}

static void
teib_adj_fib_add (const ip_address_t * ip, u32 sw_if_index, u32 fib_index)
{
  if (AF_IP6 == ip_addr_version (ip) &&
      ip6_address_is_link_local_unicast (&ip_addr_v6 (ip)))
    {
      ip6_ll_prefix_t pfx = {
	.ilp_addr = ip_addr_v6 (ip),
	.ilp_sw_if_index = sw_if_index,
      };
      ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
    }
  else
    {
      fib_prefix_t pfx;

      ip_address_to_fib_prefix (ip, &pfx);
      fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
				FIB_ENTRY_FLAG_ATTACHED,
				fib_proto_to_dpo (pfx.fp_proto),
				&pfx.fp_addr,
				sw_if_index,
				~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);


      if (0 == teib_db.td_n_entries[ip_addr_version (ip)]++)
	fib_table_lock (fib_index, pfx.fp_proto, FIB_SOURCE_ADJ);
    }
}

static void
teib_adj_fib_remove (ip_address_t * ip, u32 sw_if_index, u32 fib_index)
{
  if (AF_IP6 == ip_addr_version (ip) &&
      ip6_address_is_link_local_unicast (&ip_addr_v6 (ip)))
    {
      ip6_ll_prefix_t pfx = {
	.ilp_addr = ip_addr_v6 (ip),
	.ilp_sw_if_index = sw_if_index,
      };
      ip6_ll_table_entry_delete (&pfx);
    }
  else
    {
      fib_prefix_t pfx;

      ip_address_to_fib_prefix (ip, &pfx);
      fib_table_entry_path_remove (fib_index, &pfx, FIB_SOURCE_ADJ,
				   fib_proto_to_dpo (pfx.fp_proto),
				   &pfx.fp_addr,
				   sw_if_index,
				   ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);

      if (0 == --teib_db.td_n_entries[ip_addr_version (ip)])
	fib_table_unlock (fib_index, pfx.fp_proto, FIB_SOURCE_ADJ);
    }
}

int
teib_entry_add (u32 sw_if_index,
		const ip_address_t * peer,
		u32 nh_table_id, const ip_address_t * nh)
{
  fib_protocol_t nh_proto;
  teib_entry_t *te;
  u32 fib_index;
  index_t tei;

  nh_proto = (AF_IP4 == ip_addr_version (nh) ?
	      FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6);

  fib_index = fib_table_find (nh_proto, nh_table_id);

  if (~0 == fib_index)
    {
      return (VNET_API_ERROR_NO_SUCH_FIB);
    }

  te = teib_entry_find (sw_if_index, peer);

  if (NULL == te)
    {
      teib_key_t nk = {
	.tk_peer = *peer,
	.tk_sw_if_index = sw_if_index,
      };
      teib_entry_t *te;

      pool_get_zero (teib_pool, te);

      tei = te - teib_pool;
      te->te_key = clib_mem_alloc (sizeof (*te->te_key));
      clib_memcpy (te->te_key, &nk, sizeof (*te->te_key));

      ip_address_to_fib_prefix (nh, &te->te_nh);
      te->te_fib_index = fib_index;

      hash_set_mem (teib_db.td_db, te->te_key, tei);

      /* we how have a /32 in the overlay, add an adj-fib */
      teib_adj_fib_add (&te->te_key->tk_peer, sw_if_index, fib_index);

      TEIB_NOTIFY (te, nv_added);
      TEIB_TE_INFO (te, "created");
    }
  else
    {
      TEIB_TE_INFO (te, "exists");
      return (VNET_API_ERROR_ENTRY_ALREADY_EXISTS);
    }
  return 0;
}

int
teib_entry_del (u32 sw_if_index, const ip_address_t * peer)
{
  teib_entry_t *te;

  te = teib_entry_find (sw_if_index, peer);

  if (te != NULL)
    {
      TEIB_TE_INFO (te, "removed");

      u32 fib_index;

      fib_index = fib_table_get_index_for_sw_if_index
	(ip_address_family_to_fib_proto (ip_addr_version (peer)),
	 sw_if_index);

      teib_adj_fib_remove (&te->te_key->tk_peer, sw_if_index, fib_index);

      hash_unset_mem (teib_db.td_db, te->te_key);

      TEIB_NOTIFY (te, nv_deleted);

      clib_mem_free (te->te_key);
      pool_put (teib_pool, te);
    }
  else
    {
      TEIB_INFO ("no such entry: %U, %U, %U",
		 format_vnet_sw_if_index_name,
		 vnet_get_main (), sw_if_index, format_ip_address, peer);
      return (VNET_API_ERROR_NO_SUCH_ENTRY);
    }
  return 0;
}

u8 *
format_teib_entry (u8 * s, va_list * args)
{
  index_t tei = va_arg (*args, index_t);
  vnet_main_t *vnm = vnet_get_main ();
  teib_entry_t *te;

  te = teib_entry_get (tei);

  s = format (s, "[%d] ", tei);
  s = format (s, "%U:", format_vnet_sw_if_index_name,
	      vnm, te->te_key->tk_sw_if_index);
  s = format (s, "%U", format_ip_address,
	      &te->te_key->tk_peer, IP46_TYPE_ANY);
  s = format (s, " via [%d]:%U",
	      fib_table_get_table_id (te->te_fib_index, te->te_nh.fp_proto),
	      format_fib_prefix, &te->te_nh);

  return (s);
}

void
teib_walk (teib_walk_cb_t fn, void *ctx)
{
  index_t tei;

  /* *INDENT-OFF* */
  pool_foreach_index (tei, teib_pool)
   {
    fn(tei, ctx);
  }
  /* *INDENT-ON* */
}

void
teib_walk_itf (u32 sw_if_index, teib_walk_cb_t fn, void *ctx)
{
  index_t tei;

  /* *INDENT-OFF* */
  pool_foreach_index (tei, teib_pool)
   {
    if (sw_if_index == teib_entry_get_sw_if_index(teib_entry_get(tei)))
      fn(tei, ctx);
  }
  /* *INDENT-ON* */
}

static void
teib_walk_itf_proto (u32 sw_if_index,
		     ip_address_family_t af, teib_walk_cb_t fn, void *ctx)
{
  index_t tei;

  /* *INDENT-OFF* */
  pool_foreach_index (tei, teib_pool)
   {
    if (sw_if_index == teib_entry_get_sw_if_index(teib_entry_get(tei)) &&
        af == teib_entry_get_af(teib_entry_get(tei)))
      fn(tei, ctx);
  }
  /* *INDENT-ON* */
}

typedef struct teib_table_bind_ctx_t_
{
  u32 new_fib_index;
  u32 old_fib_index;
} teib_table_bind_ctx_t;

static walk_rc_t
teib_walk_table_bind (index_t tei, void *arg)
{
  teib_table_bind_ctx_t *ctx = arg;
  teib_entry_t *te;

  te = teib_entry_get (tei);

  TEIB_TE_INFO (te, "bind: %d -> %d", ctx->old_fib_index, ctx->new_fib_index);

  teib_adj_fib_remove (&te->te_key->tk_peer,
		       te->te_key->tk_sw_if_index, ctx->old_fib_index);
  teib_adj_fib_add (&te->te_key->tk_peer,
		    te->te_key->tk_sw_if_index, ctx->new_fib_index);

  return (WALK_CONTINUE);
}

static void
teib_table_bind_v4 (ip4_main_t * im,
		    uword opaque,
		    u32 sw_if_index, u32 new_fib_index, u32 old_fib_index)
{
  teib_table_bind_ctx_t ctx = {
    .old_fib_index = old_fib_index,
    .new_fib_index = new_fib_index,
  };

  teib_walk_itf_proto (sw_if_index, AF_IP4, teib_walk_table_bind, &ctx);
}

static void
teib_table_bind_v6 (ip6_main_t * im,
		    uword opaque,
		    u32 sw_if_index, u32 new_fib_index, u32 old_fib_index)
{
  teib_table_bind_ctx_t ctx = {
    .old_fib_index = old_fib_index,
    .new_fib_index = new_fib_index,
  };

  teib_walk_itf_proto (sw_if_index, AF_IP6, teib_walk_table_bind, &ctx);
}

void
teib_register (const teib_vft_t * vft)
{
  vec_add1 (teib_vfts, *vft);
}

static clib_error_t *
teib_init (vlib_main_t * vm)
{
  teib_db.td_db = hash_create_mem (0, sizeof (teib_key_t), sizeof (u32));

  ip4_table_bind_callback_t cb4 = {
    .function = teib_table_bind_v4,
  };
  vec_add1 (ip4_main.table_bind_callbacks, cb4);

  ip6_table_bind_callback_t cb6 = {
    .function = teib_table_bind_v6,
  };
  vec_add1 (ip6_main.table_bind_callbacks, cb6);

  teib_logger = vlib_log_register_class ("teib", "teib");

  return (NULL);
}

VLIB_INIT_FUNCTION (teib_init);

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