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 (u32 index)
27 flow_report_main_t *frm = &flow_report_main;
28 return index < vec_len (frm->streams) &&
29 frm->streams[index].domain_id != ~0;
32 static_always_inline flow_report_stream_t *
35 flow_report_main_t *frm = &flow_report_main;
37 for (i = 0; i < vec_len (frm->streams); i++)
38 if (!stream_index_valid (i))
39 return &frm->streams[i];
40 u32 index = vec_len (frm->streams);
41 vec_validate (frm->streams, index);
42 return &frm->streams[index];
45 static_always_inline void
46 delete_stream (u32 index)
48 flow_report_main_t *frm = &flow_report_main;
49 ASSERT (index < vec_len (frm->streams));
50 ASSERT (frm->streams[index].domain_id != ~0);
51 frm->streams[index].domain_id = ~0;
55 find_stream (u32 domain_id, u16 src_port)
57 flow_report_main_t *frm = &flow_report_main;
58 flow_report_stream_t *stream;
60 for (i = 0; i < vec_len (frm->streams); i++)
61 if (stream_index_valid (i))
63 stream = &frm->streams[i];
64 if (domain_id == stream->domain_id)
66 if (src_port != stream->src_port)
70 else if (src_port == stream->src_port)
79 send_template_packet (flow_report_main_t * frm,
80 flow_report_t * fr, u32 * buffer_indexp)
84 ip4_ipfix_template_packet_t *tp;
85 ipfix_message_header_t *h;
88 vlib_main_t *vm = frm->vlib_main;
89 flow_report_stream_t *stream;
91 ASSERT (buffer_indexp);
93 if (fr->update_rewrite || fr->rewrite == 0)
95 if (frm->ipfix_collector.as_u32 == 0 || frm->src_address.as_u32 == 0)
97 vlib_node_set_state (frm->vlib_main, flow_report_process_node.index,
98 VLIB_NODE_STATE_DISABLED);
101 vec_free (fr->rewrite);
102 fr->update_rewrite = 1;
105 if (fr->update_rewrite)
107 fr->rewrite = fr->rewrite_callback (frm, fr,
108 &frm->ipfix_collector,
112 fr->n_report_elements,
114 fr->update_rewrite = 0;
117 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
120 b0 = vlib_get_buffer (vm, bi0);
122 /* Initialize the buffer */
123 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
125 ASSERT (vec_len (fr->rewrite) < vlib_buffer_get_default_data_size (vm));
127 clib_memcpy_fast (b0->data, fr->rewrite, vec_len (fr->rewrite));
128 b0->current_data = 0;
129 b0->current_length = vec_len (fr->rewrite);
130 b0->flags |= (VLIB_BUFFER_TOTAL_LENGTH_VALID | VNET_BUFFER_F_FLOW_REPORT);
131 vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
132 vnet_buffer (b0)->sw_if_index[VLIB_TX] = frm->fib_index;
134 tp = vlib_buffer_get_current (b0);
135 ip = (ip4_header_t *) & tp->ip4;
136 udp = (udp_header_t *) (ip + 1);
137 h = (ipfix_message_header_t *) (udp + 1);
139 /* FIXUP: message header export_time */
140 h->export_time = (u32)
141 (((f64) frm->unix_time_0) +
142 (vlib_time_now (frm->vlib_main) - frm->vlib_time_0));
143 h->export_time = clib_host_to_net_u32 (h->export_time);
145 stream = &frm->streams[fr->stream_index];
147 /* FIXUP: message header sequence_number. Templates do not increase it */
148 h->sequence_number = clib_host_to_net_u32 (stream->sequence_number);
150 /* FIXUP: udp length */
151 udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
153 if (frm->udp_checksum)
155 /* RFC 7011 section 10.3.2. */
156 udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
157 if (udp->checksum == 0)
158 udp->checksum = 0xffff;
161 *buffer_indexp = bi0;
163 fr->last_template_sent = vlib_time_now (vm);
169 vnet_flow_rewrite_generic_callback (flow_report_main_t * frm,
171 ip4_address_t * collector_address,
172 ip4_address_t * src_address,
174 ipfix_report_element_t * report_elts,
175 u32 n_elts, u32 * stream_indexp)
179 ipfix_message_header_t *h;
180 ipfix_set_header_t *s;
181 ipfix_template_header_t *t;
182 ipfix_field_specifier_t *f;
183 ipfix_field_specifier_t *first_field;
185 ip4_ipfix_template_packet_t *tp;
186 flow_report_stream_t *stream;
188 ipfix_report_element_t *ep;
190 ASSERT (stream_indexp);
192 ASSERT (report_elts);
194 stream = &frm->streams[fr->stream_index];
195 *stream_indexp = fr->stream_index;
197 /* allocate rewrite space */
198 vec_validate_aligned (rewrite,
199 sizeof (ip4_ipfix_template_packet_t)
200 + n_elts * sizeof (ipfix_field_specifier_t) - 1,
201 CLIB_CACHE_LINE_BYTES);
203 /* create the packet rewrite string */
204 tp = (ip4_ipfix_template_packet_t *) rewrite;
205 ip = (ip4_header_t *) & tp->ip4;
206 udp = (udp_header_t *) (ip + 1);
207 h = (ipfix_message_header_t *) (udp + 1);
208 s = (ipfix_set_header_t *) (h + 1);
209 t = (ipfix_template_header_t *) (s + 1);
210 first_field = f = (ipfix_field_specifier_t *) (t + 1);
212 ip->ip_version_and_header_length = 0x45;
214 ip->protocol = IP_PROTOCOL_UDP;
215 ip->src_address.as_u32 = src_address->as_u32;
216 ip->dst_address.as_u32 = collector_address->as_u32;
217 udp->src_port = clib_host_to_net_u16 (stream->src_port);
218 udp->dst_port = clib_host_to_net_u16 (collector_port);
219 udp->length = clib_host_to_net_u16 (vec_len (rewrite) - sizeof (*ip));
221 /* FIXUP LATER: message header export_time */
222 h->domain_id = clib_host_to_net_u32 (stream->domain_id);
226 for (i = 0; i < n_elts; i++)
228 f->e_id_length = ipfix_e_id_length (0, ep->info_element, ep->size);
233 /* Back to the template packet... */
234 ip = (ip4_header_t *) & tp->ip4;
235 udp = (udp_header_t *) (ip + 1);
237 ASSERT (f - first_field);
238 /* Field count in this template */
239 t->id_count = ipfix_id_count (fr->template_id, f - first_field);
241 /* set length in octets */
243 ipfix_set_id_length (2 /* set_id */ , (u8 *) f - (u8 *) s);
245 /* message length in octets */
246 h->version_length = version_length ((u8 *) f - (u8 *) h);
248 ip->length = clib_host_to_net_u16 ((u8 *) f - (u8 *) ip);
249 ip->checksum = ip4_header_checksum (ip);
255 flow_report_process (vlib_main_t * vm,
256 vlib_node_runtime_t * rt, vlib_frame_t * f)
258 flow_report_main_t *frm = &flow_report_main;
260 u32 ip4_lookup_node_index;
261 vlib_node_t *ip4_lookup_node;
262 vlib_frame_t *nf = 0;
269 uword *event_data = 0;
271 /* Wait for Godot... */
272 vlib_process_wait_for_event_or_clock (vm, 1e9);
273 event_type = vlib_process_get_events (vm, &event_data);
275 clib_warning ("bogus kickoff event received, %d", event_type);
276 vec_reset_length (event_data);
278 /* Enqueue pkts to ip4-lookup */
279 ip4_lookup_node = vlib_get_node_by_name (vm, (u8 *) "ip4-lookup");
280 ip4_lookup_node_index = ip4_lookup_node->index;
284 vlib_process_wait_for_event_or_clock (vm, 5.0);
285 event_type = vlib_process_get_events (vm, &event_data);
286 vec_reset_length (event_data);
288 vec_foreach (fr, frm->reports)
290 now = vlib_time_now (vm);
292 /* Need to send a template packet? */
294 now > (fr->last_template_sent + frm->template_interval);
295 send_template += fr->last_template_sent == 0;
300 rv = send_template_packet (frm, fr, &template_bi);
305 nf = vlib_get_frame_to_node (vm, ip4_lookup_node_index);
307 to_next = vlib_frame_vector_args (nf);
309 if (template_bi != ~0)
311 to_next[0] = template_bi;
316 nf = fr->flow_data_callback (frm, fr,
317 nf, to_next, ip4_lookup_node_index);
319 vlib_put_frame_to_node (vm, ip4_lookup_node_index, nf);
323 return 0; /* not so much */
327 VLIB_REGISTER_NODE (flow_report_process_node) = {
328 .function = flow_report_process,
329 .type = VLIB_NODE_TYPE_PROCESS,
330 .name = "flow-report-process",
335 vnet_flow_report_add_del (flow_report_main_t * frm,
336 vnet_flow_report_add_del_args_t * a,
340 int found_index = ~0;
342 flow_report_stream_t *stream;
345 si = find_stream (a->domain_id, a->src_port);
347 return VNET_API_ERROR_INVALID_VALUE;
348 if (si == -1 && a->is_add == 0)
349 return VNET_API_ERROR_NO_SUCH_ENTRY;
351 for (i = 0; i < vec_len (frm->reports); i++)
353 fr = vec_elt_at_index (frm->reports, i);
354 if (fr->opaque.as_uword == a->opaque.as_uword
355 && fr->rewrite_callback == a->rewrite_callback
356 && fr->flow_data_callback == a->flow_data_callback)
360 *template_id = fr->template_id;
367 if (found_index != ~0)
369 vec_delete (frm->reports, 1, found_index);
370 stream = &frm->streams[si];
372 if (stream->n_reports == 0)
376 return VNET_API_ERROR_NO_SUCH_ENTRY;
379 if (found_index != ~0)
380 return VNET_API_ERROR_VALUE_EXIST;
384 stream = add_stream ();
385 stream->domain_id = a->domain_id;
386 stream->src_port = a->src_port;
387 stream->sequence_number = 0;
388 stream->n_reports = 0;
389 si = stream - frm->streams;
392 stream = &frm->streams[si];
396 vec_add2 (frm->reports, fr, 1);
398 fr->stream_index = si;
399 fr->template_id = 256 + stream->next_template_no;
400 stream->next_template_no = (stream->next_template_no + 1) % (65536 - 256);
401 fr->update_rewrite = 1;
402 fr->opaque = a->opaque;
403 fr->rewrite_callback = a->rewrite_callback;
404 fr->flow_data_callback = a->flow_data_callback;
405 fr->report_elements = a->report_elements;
406 fr->n_report_elements = a->n_report_elements;
407 fr->stream_indexp = a->stream_indexp;
409 *template_id = fr->template_id;
415 flow_report_add_del_error_to_clib_error (int error)
421 case VNET_API_ERROR_NO_SUCH_ENTRY:
422 return clib_error_return (0, "Flow report not found");
423 case VNET_API_ERROR_VALUE_EXIST:
424 return clib_error_return (0, "Flow report already exists");
425 case VNET_API_ERROR_INVALID_VALUE:
426 return clib_error_return (0, "Expecting either still unused values "
427 "for both domain_id and src_port "
428 "or already used values for both fields");
430 return clib_error_return (0, "vnet_flow_report_add_del returned %d",
436 vnet_flow_reports_reset (flow_report_main_t * frm)
441 for (i = 0; i < vec_len (frm->streams); i++)
442 if (stream_index_valid (i))
443 frm->streams[i].sequence_number = 0;
445 vec_foreach (fr, frm->reports)
447 fr->update_rewrite = 1;
448 fr->last_template_sent = 0;
453 vnet_stream_reset (flow_report_main_t * frm, u32 stream_index)
457 frm->streams[stream_index].sequence_number = 0;
459 vec_foreach (fr, frm->reports)
460 if (frm->reports->stream_index == stream_index)
462 fr->update_rewrite = 1;
463 fr->last_template_sent = 0;
468 vnet_stream_change (flow_report_main_t * frm,
469 u32 old_domain_id, u16 old_src_port,
470 u32 new_domain_id, u16 new_src_port)
472 i32 stream_index = find_stream (old_domain_id, old_src_port);
473 if (stream_index < 0)
475 flow_report_stream_t *stream = &frm->streams[stream_index];
476 stream->domain_id = new_domain_id;
477 stream->src_port = new_src_port;
478 if (old_domain_id != new_domain_id || old_src_port != new_src_port)
479 vnet_stream_reset (frm, stream_index);
483 static clib_error_t *
484 set_ipfix_exporter_command_fn (vlib_main_t * vm,
485 unformat_input_t * input,
486 vlib_cli_command_t * cmd)
488 flow_report_main_t *frm = &flow_report_main;
489 ip4_address_t collector, src;
490 u16 collector_port = UDP_DST_PORT_ipfix;
494 collector.as_u32 = 0;
496 u32 path_mtu = 512; // RFC 7011 section 10.3.3.
497 u32 template_interval = 20;
500 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
502 if (unformat (input, "collector %U", unformat_ip4_address, &collector))
504 else if (unformat (input, "port %U", unformat_udp_port,
507 else if (unformat (input, "src %U", unformat_ip4_address, &src))
509 else if (unformat (input, "fib-id %u", &fib_id))
511 ip4_main_t *im = &ip4_main;
512 uword *p = hash_get (im->fib_index_by_table_id, fib_id);
514 return clib_error_return (0, "fib ID %d doesn't exist\n", fib_id);
517 else if (unformat (input, "path-mtu %u", &path_mtu))
519 else if (unformat (input, "template-interval %u", &template_interval))
521 else if (unformat (input, "udp-checksum"))
527 if (collector.as_u32 != 0 && src.as_u32 == 0)
528 return clib_error_return (0, "src address required");
530 if (path_mtu > 1450 /* vpp does not support fragmentation */ )
531 return clib_error_return (0, "too big path-mtu value, maximum is 1450");
534 return clib_error_return (0, "too small path-mtu value, minimum is 68");
536 /* Reset report streams if we are reconfiguring IP addresses */
537 if (frm->ipfix_collector.as_u32 != collector.as_u32 ||
538 frm->src_address.as_u32 != src.as_u32 ||
539 frm->collector_port != collector_port)
540 vnet_flow_reports_reset (frm);
542 frm->ipfix_collector.as_u32 = collector.as_u32;
543 frm->collector_port = collector_port;
544 frm->src_address.as_u32 = src.as_u32;
545 frm->fib_index = fib_index;
546 frm->path_mtu = path_mtu;
547 frm->template_interval = template_interval;
548 frm->udp_checksum = udp_checksum;
550 if (collector.as_u32)
551 vlib_cli_output (vm, "Collector %U, src address %U, "
552 "fib index %d, path MTU %u, "
553 "template resend interval %us, "
555 format_ip4_address, &frm->ipfix_collector,
556 format_ip4_address, &frm->src_address,
557 fib_index, path_mtu, template_interval,
558 udp_checksum ? "enabled" : "disabled");
560 vlib_cli_output (vm, "IPFIX Collector is disabled");
562 /* Turn on the flow reporting process */
563 vlib_process_signal_event (vm, flow_report_process_node.index, 1, 0);
568 VLIB_CLI_COMMAND (set_ipfix_exporter_command, static) = {
569 .path = "set ipfix exporter",
570 .short_help = "set ipfix exporter "
571 "collector <ip4-address> [port <port>] "
572 "src <ip4-address> [fib-id <fib-id>] "
573 "[path-mtu <path-mtu>] "
574 "[template-interval <template-interval>] "
576 .function = set_ipfix_exporter_command_fn,
581 static clib_error_t *
582 ipfix_flush_command_fn (vlib_main_t * vm,
583 unformat_input_t * input, vlib_cli_command_t * cmd)
585 /* poke the flow reporting process */
586 vlib_process_signal_event (vm, flow_report_process_node.index, 1, 0);
591 VLIB_CLI_COMMAND (ipfix_flush_command, static) = {
592 .path = "ipfix flush",
593 .short_help = "flush the current ipfix data [for make test]",
594 .function = ipfix_flush_command_fn,
598 static clib_error_t *
599 flow_report_init (vlib_main_t * vm)
601 flow_report_main_t *frm = &flow_report_main;
604 frm->vnet_main = vnet_get_main ();
605 frm->unix_time_0 = time (0);
606 frm->vlib_time_0 = vlib_time_now (frm->vlib_main);
612 VLIB_INIT_FUNCTION (flow_report_init);
614 * fd.io coding-style-patch-verification: ON
617 * eval: (c-set-style "gnu")