2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
18 #include <vnet/ipfix-export/flow_report.h>
19 #include <vnet/api_errno.h>
20 #include <vnet/udp/udp.h>
22 flow_report_main_t flow_report_main;
24 static_always_inline u8
25 stream_index_valid (ipfix_exporter_t *exp, u32 index)
27 return index < vec_len (exp->streams) && exp->streams[index].domain_id != ~0;
30 static_always_inline flow_report_stream_t *
31 add_stream (ipfix_exporter_t *exp)
34 for (i = 0; i < vec_len (exp->streams); i++)
35 if (!stream_index_valid (exp, i))
36 return &exp->streams[i];
37 u32 index = vec_len (exp->streams);
38 vec_validate (exp->streams, index);
39 return &exp->streams[index];
42 static_always_inline void
43 delete_stream (ipfix_exporter_t *exp, u32 index)
45 ASSERT (index < vec_len (exp->streams));
46 ASSERT (exp->streams[index].domain_id != ~0);
47 exp->streams[index].domain_id = ~0;
51 find_stream (ipfix_exporter_t *exp, u32 domain_id, u16 src_port)
53 flow_report_stream_t *stream;
55 for (i = 0; i < vec_len (exp->streams); i++)
56 if (stream_index_valid (exp, i))
58 stream = &exp->streams[i];
59 if (domain_id == stream->domain_id)
61 if (src_port != stream->src_port)
65 else if (src_port == stream->src_port)
74 send_template_packet (flow_report_main_t *frm, ipfix_exporter_t *exp,
75 flow_report_t *fr, u32 *buffer_indexp)
79 ip4_ipfix_template_packet_t *tp;
80 ipfix_message_header_t *h;
83 vlib_main_t *vm = frm->vlib_main;
84 flow_report_stream_t *stream;
86 ASSERT (buffer_indexp);
88 if (fr->update_rewrite || fr->rewrite == 0)
90 if (exp->ipfix_collector.as_u32 == 0 || exp->src_address.as_u32 == 0)
92 vlib_node_set_state (frm->vlib_main, flow_report_process_node.index,
93 VLIB_NODE_STATE_DISABLED);
96 vec_free (fr->rewrite);
97 fr->update_rewrite = 1;
100 if (fr->update_rewrite)
102 fr->rewrite = fr->rewrite_callback (
103 exp, fr, &exp->ipfix_collector, &exp->src_address, exp->collector_port,
104 fr->report_elements, fr->n_report_elements, fr->stream_indexp);
105 fr->update_rewrite = 0;
108 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
111 b0 = vlib_get_buffer (vm, bi0);
113 ASSERT (vec_len (fr->rewrite) < vlib_buffer_get_default_data_size (vm));
115 clib_memcpy_fast (b0->data, fr->rewrite, vec_len (fr->rewrite));
116 b0->current_data = 0;
117 b0->current_length = vec_len (fr->rewrite);
118 b0->flags |= (VLIB_BUFFER_TOTAL_LENGTH_VALID | VNET_BUFFER_F_FLOW_REPORT);
119 vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
120 vnet_buffer (b0)->sw_if_index[VLIB_TX] = exp->fib_index;
122 tp = vlib_buffer_get_current (b0);
123 ip = (ip4_header_t *) & tp->ip4;
124 udp = (udp_header_t *) (ip + 1);
125 h = (ipfix_message_header_t *) (udp + 1);
127 /* FIXUP: message header export_time */
128 h->export_time = (u32)
129 (((f64) frm->unix_time_0) +
130 (vlib_time_now (frm->vlib_main) - frm->vlib_time_0));
131 h->export_time = clib_host_to_net_u32 (h->export_time);
133 stream = &exp->streams[fr->stream_index];
135 /* FIXUP: message header sequence_number. Templates do not increase it */
136 h->sequence_number = clib_host_to_net_u32 (stream->sequence_number);
138 /* FIXUP: udp length */
139 udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
141 if (exp->udp_checksum)
143 /* RFC 7011 section 10.3.2. */
144 udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
145 if (udp->checksum == 0)
146 udp->checksum = 0xffff;
149 *buffer_indexp = bi0;
151 fr->last_template_sent = vlib_time_now (vm);
157 vnet_flow_rewrite_generic_callback (ipfix_exporter_t *exp, flow_report_t *fr,
158 ip4_address_t *collector_address,
159 ip4_address_t *src_address,
161 ipfix_report_element_t *report_elts,
162 u32 n_elts, u32 *stream_indexp)
166 ipfix_message_header_t *h;
167 ipfix_set_header_t *s;
168 ipfix_template_header_t *t;
169 ipfix_field_specifier_t *f;
170 ipfix_field_specifier_t *first_field;
172 ip4_ipfix_template_packet_t *tp;
173 flow_report_stream_t *stream;
175 ipfix_report_element_t *ep;
177 ASSERT (stream_indexp);
179 ASSERT (report_elts);
181 stream = &exp->streams[fr->stream_index];
182 *stream_indexp = fr->stream_index;
184 /* allocate rewrite space */
185 vec_validate_aligned (rewrite,
186 sizeof (ip4_ipfix_template_packet_t)
187 + n_elts * sizeof (ipfix_field_specifier_t) - 1,
188 CLIB_CACHE_LINE_BYTES);
190 /* create the packet rewrite string */
191 tp = (ip4_ipfix_template_packet_t *) rewrite;
192 ip = (ip4_header_t *) & tp->ip4;
193 udp = (udp_header_t *) (ip + 1);
194 h = (ipfix_message_header_t *) (udp + 1);
195 s = (ipfix_set_header_t *) (h + 1);
196 t = (ipfix_template_header_t *) (s + 1);
197 first_field = f = (ipfix_field_specifier_t *) (t + 1);
199 ip->ip_version_and_header_length = 0x45;
201 ip->protocol = IP_PROTOCOL_UDP;
202 ip->src_address.as_u32 = src_address->as_u32;
203 ip->dst_address.as_u32 = collector_address->as_u32;
204 udp->src_port = clib_host_to_net_u16 (stream->src_port);
205 udp->dst_port = clib_host_to_net_u16 (collector_port);
206 udp->length = clib_host_to_net_u16 (vec_len (rewrite) - sizeof (*ip));
208 /* FIXUP LATER: message header export_time */
209 h->domain_id = clib_host_to_net_u32 (stream->domain_id);
213 for (i = 0; i < n_elts; i++)
215 f->e_id_length = ipfix_e_id_length (0, ep->info_element, ep->size);
220 /* Back to the template packet... */
221 ip = (ip4_header_t *) & tp->ip4;
222 udp = (udp_header_t *) (ip + 1);
224 ASSERT (f - first_field);
225 /* Field count in this template */
226 t->id_count = ipfix_id_count (fr->template_id, f - first_field);
228 /* set length in octets */
230 ipfix_set_id_length (2 /* set_id */ , (u8 *) f - (u8 *) s);
232 /* message length in octets */
233 h->version_length = version_length ((u8 *) f - (u8 *) h);
235 ip->length = clib_host_to_net_u16 ((u8 *) f - (u8 *) ip);
236 ip->checksum = ip4_header_checksum (ip);
242 flow_report_process (vlib_main_t * vm,
243 vlib_node_runtime_t * rt, vlib_frame_t * f)
245 flow_report_main_t *frm = &flow_report_main;
247 u32 ip4_lookup_node_index;
248 vlib_node_t *ip4_lookup_node;
249 vlib_frame_t *nf = 0;
254 f64 def_wait_time = 5.0;
257 uword *event_data = 0;
259 /* Wait for Godot... */
260 vlib_process_wait_for_event_or_clock (vm, 1e9);
261 event_type = vlib_process_get_events (vm, &event_data);
263 clib_warning ("bogus kickoff event received, %d", event_type);
264 vec_reset_length (event_data);
266 /* Enqueue pkts to ip4-lookup */
267 ip4_lookup_node = vlib_get_node_by_name (vm, (u8 *) "ip4-lookup");
268 ip4_lookup_node_index = ip4_lookup_node->index;
270 wait_time = def_wait_time;
274 vlib_process_wait_for_event_or_clock (vm, wait_time);
275 event_type = vlib_process_get_events (vm, &event_data);
276 vec_reset_length (event_data);
277 ipfix_exporter_t *exp;
278 pool_foreach (exp, frm->exporters)
281 /* 5s delay by default, possibly reduced by template intervals */
282 wait_time = def_wait_time;
284 vec_foreach (fr, exp->reports)
287 now = vlib_time_now (vm);
289 /* Need to send a template packet? */
291 now > (fr->last_template_sent + exp->template_interval);
292 send_template += fr->last_template_sent == 0;
297 rv = send_template_packet (frm, exp, fr, &template_bi);
303 * decide if template should be sent sooner than current wait
307 (fr->last_template_sent + exp->template_interval) - now;
308 wait_time = clib_min (wait_time, next_template);
310 nf = vlib_get_frame_to_node (vm, ip4_lookup_node_index);
312 to_next = vlib_frame_vector_args (nf);
314 if (template_bi != ~0)
316 to_next[0] = template_bi;
321 nf = fr->flow_data_callback (frm, exp, fr, nf, to_next,
322 ip4_lookup_node_index);
324 vlib_put_frame_to_node (vm, ip4_lookup_node_index, nf);
329 return 0; /* not so much */
333 VLIB_REGISTER_NODE (flow_report_process_node) = {
334 .function = flow_report_process,
335 .type = VLIB_NODE_TYPE_PROCESS,
336 .name = "flow-report-process",
341 vnet_flow_report_add_del (ipfix_exporter_t *exp,
342 vnet_flow_report_add_del_args_t *a, u16 *template_id)
345 int found_index = ~0;
347 flow_report_stream_t *stream;
350 si = find_stream (exp, a->domain_id, a->src_port);
352 return VNET_API_ERROR_INVALID_VALUE;
353 if (si == -1 && a->is_add == 0)
354 return VNET_API_ERROR_NO_SUCH_ENTRY;
356 for (i = 0; i < vec_len (exp->reports); i++)
358 fr = vec_elt_at_index (exp->reports, i);
359 if (fr->opaque.as_uword == a->opaque.as_uword
360 && fr->rewrite_callback == a->rewrite_callback
361 && fr->flow_data_callback == a->flow_data_callback)
365 *template_id = fr->template_id;
372 if (found_index != ~0)
374 vec_delete (exp->reports, 1, found_index);
375 stream = &exp->streams[si];
377 if (stream->n_reports == 0)
378 delete_stream (exp, si);
381 return VNET_API_ERROR_NO_SUCH_ENTRY;
384 if (found_index != ~0)
385 return VNET_API_ERROR_VALUE_EXIST;
389 stream = add_stream (exp);
390 stream->domain_id = a->domain_id;
391 stream->src_port = a->src_port;
392 stream->sequence_number = 0;
393 stream->n_reports = 0;
394 si = stream - exp->streams;
397 stream = &exp->streams[si];
401 vec_add2 (exp->reports, fr, 1);
403 fr->stream_index = si;
404 fr->template_id = 256 + stream->next_template_no;
405 stream->next_template_no = (stream->next_template_no + 1) % (65536 - 256);
406 fr->update_rewrite = 1;
407 fr->opaque = a->opaque;
408 fr->rewrite_callback = a->rewrite_callback;
409 fr->flow_data_callback = a->flow_data_callback;
410 fr->report_elements = a->report_elements;
411 fr->n_report_elements = a->n_report_elements;
412 fr->stream_indexp = a->stream_indexp;
414 *template_id = fr->template_id;
420 flow_report_add_del_error_to_clib_error (int error)
426 case VNET_API_ERROR_NO_SUCH_ENTRY:
427 return clib_error_return (0, "Flow report not found");
428 case VNET_API_ERROR_VALUE_EXIST:
429 return clib_error_return (0, "Flow report already exists");
430 case VNET_API_ERROR_INVALID_VALUE:
431 return clib_error_return (0, "Expecting either still unused values "
432 "for both domain_id and src_port "
433 "or already used values for both fields");
435 return clib_error_return (0, "vnet_flow_report_add_del returned %d",
441 vnet_flow_reports_reset (ipfix_exporter_t *exp)
446 for (i = 0; i < vec_len (exp->streams); i++)
447 if (stream_index_valid (exp, i))
448 exp->streams[i].sequence_number = 0;
450 vec_foreach (fr, exp->reports)
452 fr->update_rewrite = 1;
453 fr->last_template_sent = 0;
458 vnet_stream_reset (ipfix_exporter_t *exp, u32 stream_index)
462 exp->streams[stream_index].sequence_number = 0;
464 vec_foreach (fr, exp->reports)
465 if (exp->reports->stream_index == stream_index)
467 fr->update_rewrite = 1;
468 fr->last_template_sent = 0;
473 vnet_stream_change (ipfix_exporter_t *exp, u32 old_domain_id, u16 old_src_port,
474 u32 new_domain_id, u16 new_src_port)
476 i32 stream_index = find_stream (exp, old_domain_id, old_src_port);
478 if (stream_index < 0)
480 flow_report_stream_t *stream = &exp->streams[stream_index];
481 stream->domain_id = new_domain_id;
482 stream->src_port = new_src_port;
483 if (old_domain_id != new_domain_id || old_src_port != new_src_port)
484 vnet_stream_reset (exp, stream_index);
488 static clib_error_t *
489 set_ipfix_exporter_command_fn (vlib_main_t * vm,
490 unformat_input_t * input,
491 vlib_cli_command_t * cmd)
493 flow_report_main_t *frm = &flow_report_main;
494 ip4_address_t collector, src;
495 u16 collector_port = UDP_DST_PORT_ipfix;
499 collector.as_u32 = 0;
501 u32 path_mtu = 512; // RFC 7011 section 10.3.3.
502 u32 template_interval = 20;
504 ipfix_exporter_t *exp = pool_elt_at_index (frm->exporters, 0);
506 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
508 if (unformat (input, "collector %U", unformat_ip4_address, &collector))
510 else if (unformat (input, "port %U", unformat_udp_port,
513 else if (unformat (input, "src %U", unformat_ip4_address, &src))
515 else if (unformat (input, "fib-id %u", &fib_id))
517 ip4_main_t *im = &ip4_main;
518 uword *p = hash_get (im->fib_index_by_table_id, fib_id);
520 return clib_error_return (0, "fib ID %d doesn't exist\n", fib_id);
523 else if (unformat (input, "path-mtu %u", &path_mtu))
525 else if (unformat (input, "template-interval %u", &template_interval))
527 else if (unformat (input, "udp-checksum"))
533 if (collector.as_u32 != 0 && src.as_u32 == 0)
534 return clib_error_return (0, "src address required");
536 if (path_mtu > 1450 /* vpp does not support fragmentation */ )
537 return clib_error_return (0, "too big path-mtu value, maximum is 1450");
540 return clib_error_return (0, "too small path-mtu value, minimum is 68");
542 /* Reset report streams if we are reconfiguring IP addresses */
543 if (exp->ipfix_collector.as_u32 != collector.as_u32 ||
544 exp->src_address.as_u32 != src.as_u32 ||
545 exp->collector_port != collector_port)
546 vnet_flow_reports_reset (exp);
548 exp->ipfix_collector.as_u32 = collector.as_u32;
549 exp->collector_port = collector_port;
550 exp->src_address.as_u32 = src.as_u32;
551 exp->fib_index = fib_index;
552 exp->path_mtu = path_mtu;
553 exp->template_interval = template_interval;
554 exp->udp_checksum = udp_checksum;
556 if (collector.as_u32)
558 "Collector %U, src address %U, "
559 "fib index %d, path MTU %u, "
560 "template resend interval %us, "
562 format_ip4_address, exp->ipfix_collector,
563 format_ip4_address, exp->src_address, fib_index, path_mtu,
564 template_interval, udp_checksum ? "enabled" : "disabled");
566 vlib_cli_output (vm, "IPFIX Collector is disabled");
568 /* Turn on the flow reporting process */
569 vlib_process_signal_event (vm, flow_report_process_node.index, 1, 0);
574 VLIB_CLI_COMMAND (set_ipfix_exporter_command, static) = {
575 .path = "set ipfix exporter",
576 .short_help = "set ipfix exporter "
577 "collector <ip4-address> [port <port>] "
578 "src <ip4-address> [fib-id <fib-id>] "
579 "[path-mtu <path-mtu>] "
580 "[template-interval <template-interval>] "
582 .function = set_ipfix_exporter_command_fn,
587 static clib_error_t *
588 ipfix_flush_command_fn (vlib_main_t * vm,
589 unformat_input_t * input, vlib_cli_command_t * cmd)
591 /* poke the flow reporting process */
592 vlib_process_signal_event (vm, flow_report_process_node.index, 1, 0);
597 VLIB_CLI_COMMAND (ipfix_flush_command, static) = {
598 .path = "ipfix flush",
599 .short_help = "flush the current ipfix data [for make test]",
600 .function = ipfix_flush_command_fn,
604 static clib_error_t *
605 flow_report_init (vlib_main_t * vm)
607 flow_report_main_t *frm = &flow_report_main;
608 ipfix_exporter_t *exp;
611 frm->vnet_main = vnet_get_main ();
612 frm->unix_time_0 = time (0);
613 frm->vlib_time_0 = vlib_time_now (frm->vlib_main);
615 * Make sure that we can always access the first exporter for
616 * backwards compatibility reasons.
618 pool_alloc (frm->exporters, IPFIX_EXPORTERS_MAX);
619 pool_get (frm->exporters, exp);
620 /* Verify that this is at index 0 */
621 ASSERT (frm->exporters == exp);
626 VLIB_INIT_FUNCTION (flow_report_init);
628 * fd.io coding-style-patch-verification: ON
631 * eval: (c-set-style "gnu")