aboutsummaryrefslogtreecommitdiffstats
path: root/src/vnet/ipfix-export/flow_api.c
blob: 4a9b525ac67edb2071e7f7b179b2a85fc94d2dc2 (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
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
/*
 *------------------------------------------------------------------
 * flow_api.c - flow api
 *
 * 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/vnet.h>
#include <vlibmemory/api.h>
#include <vnet/ip/ip_types_api.h>
#include <vnet/udp/udp_local.h>

#include <vnet/interface.h>
#include <vnet/api_errno.h>

#include <vnet/fib/fib_table.h>
#include <vnet/ipfix-export/flow_report.h>
#include <vnet/ipfix-export/flow_report_classify.h>

#include <vnet/format_fns.h>
#include <vnet/ipfix-export/ipfix_export.api_enum.h>
#include <vnet/ipfix-export/ipfix_export.api_types.h>

#define REPLY_MSG_ID_BASE frm->msg_id_base
#include <vlibapi/api_helper_macros.h>

ipfix_exporter_t *
vnet_ipfix_exporter_lookup (const ip_address_t *ipfix_collector)
{
  flow_report_main_t *frm = &flow_report_main;
  ipfix_exporter_t *exp;

  pool_foreach (exp, frm->exporters)
    {
      if (ip_address_cmp (&exp->ipfix_collector, ipfix_collector) == 0)
	return exp;
    }

  return NULL;
}

/*
 * For backwards compatibility reasons index 0 in the set of exporters
 * is alwyas used for the exporter created via the set_ipfix_exporter
 * API.
 */
#define USE_INDEX_0   true
#define USE_ANY_INDEX false

static int
vl_api_set_ipfix_exporter_t_internal (
  u32 client_index, vl_api_address_t *mp_collector_address,
  u16 mp_collector_port, vl_api_address_t *mp_src_address, u32 mp_vrf_id,
  u32 mp_path_mtu, u32 mp_template_interval, bool mp_udp_checksum,
  bool use_index_0, bool is_create)
{
  vlib_main_t *vm = vlib_get_main ();
  flow_report_main_t *frm = &flow_report_main;
  ipfix_exporter_t *exp;
  vl_api_registration_t *reg;
  ip_address_t collector, src;
  u16 collector_port = UDP_DST_PORT_ipfix;
  u32 path_mtu;
  u32 template_interval;
  u8 udp_checksum;
  u32 fib_id;
  u32 fib_index = ~0;
  u32 ip_header_size;

  reg = vl_api_client_index_to_registration (client_index);
  if (!reg)
    return VNET_API_ERROR_UNIMPLEMENTED;

  if (use_index_0)
    {
      /*
       * In this case we update the existing exporter. There is no delete
       * for exp[0]
       */
      exp = &frm->exporters[0];

      /* Collector address must be IPv4 for exp[0] */
      collector.version = AF_IP4;
      ip4_address_decode (mp_collector_address->un.ip4, &collector.ip.ip4);
    }
  else
    {
      ip_address_decode2 (mp_collector_address, &collector);
      if (is_create)
	{
	  exp = vnet_ipfix_exporter_lookup (&collector);
	  if (!exp)
	    {
	      /* Create a new exporter instead of updating an existing one */
	      if (pool_elts (frm->exporters) >= IPFIX_EXPORTERS_MAX)
		return VNET_API_ERROR_INVALID_VALUE;
	      pool_get (frm->exporters, exp);
	      if (!exp)
		return VNET_API_ERROR_INVALID_VALUE;
	    }
	}
      else
	{
	  /* Delete the exporter */
	  exp = vnet_ipfix_exporter_lookup (&collector);
	  if (!exp)
	    return VNET_API_ERROR_NO_SUCH_ENTRY;

	  pool_put (frm->exporters, exp);
	  return 0;
	}
    }

  collector_port = ntohs (mp_collector_port);
  if (collector_port == (u16) ~ 0)
    collector_port = UDP_DST_PORT_ipfix;
  ip_address_decode2 (mp_src_address, &src);
  fib_id = ntohl (mp_vrf_id);

  ip4_main_t *im = &ip4_main;
  if (fib_id == ~0)
    {
      fib_index = ~0;
    }
  else
    {
      uword *p = hash_get (im->fib_index_by_table_id, fib_id);
      if (!p)
	return VNET_API_ERROR_NO_SUCH_FIB;
      fib_index = p[0];
    }

  path_mtu = ntohl (mp_path_mtu);
  if (path_mtu == ~0)
    path_mtu = 512;		// RFC 7011 section 10.3.3.
  template_interval = ntohl (mp_template_interval);
  if (template_interval == ~0)
    template_interval = 20;
  udp_checksum = mp_udp_checksum;

  /*
   * If the collector address is set then the src must be too.
   * Collector address can be set to 0 to disable exporter
   */
  if (!ip_address_is_zero (&collector) && ip_address_is_zero (&src))
    return VNET_API_ERROR_INVALID_VALUE;
  if (collector.version != src.version)
    return VNET_API_ERROR_INVALID_VALUE;

  if (path_mtu > 1450 /* vpp does not support fragmentation */ )
    return VNET_API_ERROR_INVALID_VALUE;

  if (path_mtu < 68)
    return VNET_API_ERROR_INVALID_VALUE;

  /* Calculate how much header data we need. */
  if (collector.version == AF_IP4)
    ip_header_size = sizeof (ip4_header_t);
  else
    ip_header_size = sizeof (ip6_header_t);
  exp->all_headers_size = ip_header_size + sizeof (udp_header_t) +
			  sizeof (ipfix_message_header_t) +
			  sizeof (ipfix_set_header_t);

  /* Reset report streams if we are reconfiguring IP addresses */
  if (ip_address_cmp (&exp->ipfix_collector, &collector) ||
      ip_address_cmp (&exp->src_address, &src) ||
      exp->collector_port != collector_port)
    vnet_flow_reports_reset (exp);

  exp->ipfix_collector = collector;
  exp->collector_port = collector_port;
  exp->src_address = src;
  exp->fib_index = fib_index;
  exp->path_mtu = path_mtu;
  exp->template_interval = template_interval;
  exp->udp_checksum = udp_checksum;

  /* Turn on the flow reporting process */
  vlib_process_signal_event (vm, flow_report_process_node.index, 1, 0);

  return 0;
}

static void
vl_api_set_ipfix_exporter_t_handler (vl_api_set_ipfix_exporter_t *mp)
{
  vl_api_set_ipfix_exporter_reply_t *rmp;
  flow_report_main_t *frm = &flow_report_main;
  int rv = vl_api_set_ipfix_exporter_t_internal (
    mp->client_index, &mp->collector_address, mp->collector_port,
    &mp->src_address, mp->vrf_id, mp->path_mtu, mp->template_interval,
    mp->udp_checksum, USE_INDEX_0, 0);

  REPLY_MACRO (VL_API_SET_IPFIX_EXPORTER_REPLY);
}

static void
vl_api_ipfix_exporter_create_delete_t_handler (
  vl_api_ipfix_exporter_create_delete_t *mp)
{
  vl_api_ipfix_exporter_create_delete_reply_t *rmp;
  flow_report_main_t *frm = &flow_report_main;
  int rv = vl_api_set_ipfix_exporter_t_internal (
    mp->client_index, &mp->collector_address, mp->collector_port,
    &mp->src_address, mp->vrf_id, mp->path_mtu, mp->template_interval,
    mp->udp_checksum, USE_ANY_INDEX, mp->is_create);

  REPLY_MACRO (VL_API_IPFIX_EXPORTER_CREATE_DELETE_REPLY);
}

static void
vl_api_ipfix_exporter_dump_t_handler (vl_api_ipfix_exporter_dump_t * mp)
{
  flow_report_main_t *frm = &flow_report_main;
  ipfix_exporter_t *exp = pool_elt_at_index (flow_report_main.exporters, 0);
  vl_api_registration_t *reg;
  vl_api_ipfix_exporter_details_t *rmp;
  ip4_main_t *im = &ip4_main;
  u32 vrf_id;

  reg = vl_api_client_index_to_registration (mp->client_index);
  if (!reg)
    return;

  rmp = vl_msg_api_alloc (sizeof (*rmp));
  clib_memset (rmp, 0, sizeof (*rmp));
  rmp->_vl_msg_id =
    ntohs ((REPLY_MSG_ID_BASE) + VL_API_IPFIX_EXPORTER_DETAILS);
  rmp->context = mp->context;

  ip_address_encode2 (&exp->ipfix_collector, &rmp->collector_address);
  rmp->collector_port = htons (exp->collector_port);
  ip_address_encode2 (&exp->src_address, &rmp->src_address);

  if (exp->fib_index == ~0)
    vrf_id = ~0;
  else
    vrf_id = im->fibs[exp->fib_index].ft_table_id;
  rmp->vrf_id = htonl (vrf_id);
  rmp->path_mtu = htonl (exp->path_mtu);
  rmp->template_interval = htonl (exp->template_interval);
  rmp->udp_checksum = (exp->udp_checksum != 0);

  vl_api_send_msg (reg, (u8 *) rmp);
}

static void
ipfix_all_fill_details (vl_api_ipfix_all_exporter_details_t *rmp,
			ipfix_exporter_t *exp)
{
  ip4_main_t *im = &ip4_main;
  u32 vrf_id;

  ip_address_encode2 (&exp->ipfix_collector, &rmp->collector_address);
  rmp->collector_port = htons (exp->collector_port);
  ip_address_encode2 (&exp->src_address, &rmp->src_address);

  if (exp->fib_index == ~0)
    vrf_id = ~0;
  else
    vrf_id = im->fibs[exp->fib_index].ft_table_id;
  rmp->vrf_id = htonl (vrf_id);
  rmp->path_mtu = htonl (exp->path_mtu);
  rmp->template_interval = htonl (exp->template_interval);
  rmp->udp_checksum = (exp->udp_checksum != 0);
}

static void
ipfix_all_exporter_details (flow_report_main_t *frm, u32 index,
			    vl_api_registration_t *rp, u32 context)
{
  ipfix_exporter_t *exp = pool_elt_at_index (frm->exporters, index);

  vl_api_ipfix_all_exporter_details_t *rmp;

  REPLY_MACRO_DETAILS4 (VL_API_IPFIX_ALL_EXPORTER_DETAILS, rp, context,
			({ ipfix_all_fill_details (rmp, exp); }));
}

static void
vl_api_ipfix_all_exporter_get_t_handler (vl_api_ipfix_all_exporter_get_t *mp)
{
  flow_report_main_t *frm = &flow_report_main;
  vl_api_ipfix_all_exporter_get_reply_t *rmp;
  int rv = 0;

  REPLY_AND_DETAILS_MACRO (
    VL_API_IPFIX_ALL_EXPORTER_GET_REPLY, frm->exporters,
    ({ ipfix_all_exporter_details (frm, cursor, rp, mp->context); }));
}

static void
  vl_api_set_ipfix_classify_stream_t_handler
  (vl_api_set_ipfix_classify_stream_t * mp)
{
  vl_api_set_ipfix_classify_stream_reply_t *rmp;
  flow_report_classify_main_t *fcm = &flow_report_classify_main;
  flow_report_main_t *frm = &flow_report_main;
  ipfix_exporter_t *exp = &frm->exporters[0];
  u32 domain_id = 0;
  u32 src_port = UDP_DST_PORT_ipfix;
  int rv = 0;

  domain_id = ntohl (mp->domain_id);
  src_port = ntohs (mp->src_port);

  if (fcm->src_port != 0 &&
      (fcm->domain_id != domain_id || fcm->src_port != (u16) src_port))
    {
      int rv = vnet_stream_change (exp, fcm->domain_id, fcm->src_port,
				   domain_id, (u16) src_port);
      ASSERT (rv == 0);
    }

  fcm->domain_id = domain_id;
  fcm->src_port = (u16) src_port;

  REPLY_MACRO (VL_API_SET_IPFIX_CLASSIFY_STREAM_REPLY);
}

static void
  vl_api_ipfix_classify_stream_dump_t_handler
  (vl_api_ipfix_classify_stream_dump_t * mp)
{
  flow_report_classify_main_t *fcm = &flow_report_classify_main;
  vl_api_registration_t *reg;
  vl_api_ipfix_classify_stream_details_t *rmp;

  reg = vl_api_client_index_to_registration (mp->client_index);
  if (!reg)
    return;

  rmp = vl_msg_api_alloc (sizeof (*rmp));
  clib_memset (rmp, 0, sizeof (*rmp));
  rmp->_vl_msg_id = ntohs (VL_API_IPFIX_CLASSIFY_STREAM_DETAILS);
  rmp->context = mp->context;
  rmp->domain_id = htonl (fcm->domain_id);
  rmp->src_port = htons (fcm->src_port);

  vl_api_send_msg (reg, (u8 *) rmp);
}

static void
  vl_api_ipfix_classify_table_add_del_t_handler
  (vl_api_ipfix_classify_table_add_del_t * mp)
{
  vl_api_ipfix_classify_table_add_del_reply_t *rmp;
  vl_api_registration_t *reg;
  flow_report_classify_main_t *fcm = &flow_report_classify_main;
  flow_report_main_t *frm = &flow_report_main;
  ipfix_exporter_t *exp = &frm->exporters[0];
  vnet_flow_report_add_del_args_t args;
  ipfix_classify_table_t *table;
  int is_add;
  u32 classify_table_index;
  u8 ip_version;
  u8 transport_protocol;
  int rv = 0;

  reg = vl_api_client_index_to_registration (mp->client_index);
  if (!reg)
    return;

  classify_table_index = ntohl (mp->table_id);
  ip_version = (mp->ip_version == ADDRESS_IP4) ? 4 : 6;
  transport_protocol = mp->transport_protocol;
  is_add = mp->is_add;

  if (fcm->src_port == 0)
    {
      /* call set_ipfix_classify_stream first */
      rv = VNET_API_ERROR_UNSPECIFIED;
      goto out;
    }

  clib_memset (&args, 0, sizeof (args));

  table = 0;
  int i;
  for (i = 0; i < vec_len (fcm->tables); i++)
    if (ipfix_classify_table_index_valid (i))
      if (fcm->tables[i].classify_table_index == classify_table_index)
	{
	  table = &fcm->tables[i];
	  break;
	}

  if (is_add)
    {
      if (table)
	{
	  rv = VNET_API_ERROR_VALUE_EXIST;
	  goto out;
	}
      table = ipfix_classify_add_table ();
      table->classify_table_index = classify_table_index;
    }
  else
    {
      if (!table)
	{
	  rv = VNET_API_ERROR_NO_SUCH_ENTRY;
	  goto out;
	}
    }

  table->ip_version = ip_version;
  table->transport_protocol = transport_protocol;

  args.opaque.as_uword = table - fcm->tables;
  args.rewrite_callback = ipfix_classify_template_rewrite;
  args.flow_data_callback = ipfix_classify_send_flows;
  args.is_add = is_add;
  args.domain_id = fcm->domain_id;
  args.src_port = fcm->src_port;

  rv = vnet_flow_report_add_del (exp, &args, NULL);

  /* If deleting, or add failed */
  if (is_add == 0 || (rv && is_add))
    ipfix_classify_delete_table (table - fcm->tables);

out:
  REPLY_MACRO (VL_API_SET_IPFIX_CLASSIFY_STREAM_REPLY);
}

static void
send_ipfix_classify_table_details (u32 table_index,
				   vl_api_registration_t * reg, u32 context)
{
  flow_report_classify_main_t *fcm = &flow_report_classify_main;
  vl_api_ipfix_classify_table_details_t *mp;

  ipfix_classify_table_t *table = &fcm->tables[table_index];

  mp = vl_msg_api_alloc (sizeof (*mp));
  clib_memset (mp, 0, sizeof (*mp));
  mp->_vl_msg_id = ntohs (VL_API_IPFIX_CLASSIFY_TABLE_DETAILS);
  mp->context = context;
  mp->table_id = htonl (table->classify_table_index);
  mp->ip_version = (table->ip_version == 4) ? ADDRESS_IP4 : ADDRESS_IP6;
  mp->transport_protocol = table->transport_protocol;

  vl_api_send_msg (reg, (u8 *) mp);
}

static void
  vl_api_ipfix_classify_table_dump_t_handler
  (vl_api_ipfix_classify_table_dump_t * mp)
{
  flow_report_classify_main_t *fcm = &flow_report_classify_main;
  vl_api_registration_t *reg;
  u32 i;

  reg = vl_api_client_index_to_registration (mp->client_index);
  if (!reg)
    return;

  for (i = 0; i < vec_len (fcm->tables); i++)
    if (ipfix_classify_table_index_valid (i))
      send_ipfix_classify_table_details (i, reg, mp->context);
}

static void
vl_api_ipfix_flush_t_handler (vl_api_ipfix_flush_t * mp)
{
  flow_report_main_t *frm = &flow_report_main;
  vl_api_ipfix_flush_reply_t *rmp;
  vl_api_registration_t *reg;
  vlib_main_t *vm = vlib_get_main ();
  int rv = 0;

  reg = vl_api_client_index_to_registration (mp->client_index);
  if (!reg)
    return;

  /* poke the flow reporting process */
  vlib_process_signal_event (vm, flow_report_process_node.index,
			     1 /* type_opaque */ , 0 /* data */ );

  REPLY_MACRO (VL_API_IPFIX_FLUSH_REPLY);
}

#include <vnet/ipfix-export/ipfix_export.api.c>
static clib_error_t *
flow_api_hookup (vlib_main_t * vm)
{
  flow_report_main_t *frm = &flow_report_main;
  /*
   * Set up the (msg_name, crc, message-id) table
   */
  REPLY_MSG_ID_BASE = setup_message_id_table ();

  return 0;
}

VLIB_API_INIT_FUNCTION (flow_api_hookup);

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