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/flow/flow_report.h>
19 #include <vnet/api_errno.h>
21 flow_report_main_t flow_report_main;
23 static_always_inline u8 stream_index_valid (u32 index)
25 flow_report_main_t * frm = &flow_report_main;
26 return index < vec_len(frm->streams) &&
27 frm->streams[index].domain_id != ~0;
30 static_always_inline flow_report_stream_t * add_stream (void)
32 flow_report_main_t * frm = &flow_report_main;
34 for (i = 0; i < vec_len(frm->streams); i++)
35 if (!stream_index_valid(i))
36 return &frm->streams[i];
37 u32 index = vec_len(frm->streams);
38 vec_validate(frm->streams, index);
39 return &frm->streams[index];
42 static_always_inline void delete_stream (u32 index)
44 flow_report_main_t * frm = &flow_report_main;
45 ASSERT (index < vec_len(frm->streams));
46 ASSERT (frm->streams[index].domain_id != ~0);
47 frm->streams[index].domain_id = ~0;
50 static i32 find_stream (u32 domain_id, u16 src_port)
52 flow_report_main_t * frm = &flow_report_main;
53 flow_report_stream_t * stream;
55 for (i = 0; i < vec_len(frm->streams); i++)
56 if (stream_index_valid(i)) {
57 stream = &frm->streams[i];
58 if (domain_id == stream->domain_id) {
59 if (src_port != stream->src_port)
62 } else if (src_port == stream->src_port) {
69 int send_template_packet (flow_report_main_t *frm,
75 ip4_ipfix_template_packet_t * tp;
76 ipfix_message_header_t * h;
79 vlib_main_t * vm = frm->vlib_main;
80 flow_report_stream_t * stream;
81 vlib_buffer_free_list_t *fl;
83 ASSERT (buffer_indexp);
85 if (fr->update_rewrite || fr->rewrite == 0)
87 if (frm->ipfix_collector.as_u32 == 0
88 || frm->src_address.as_u32 == 0)
90 clib_warning ("no collector: disabling flow collector process");
91 vlib_node_set_state (frm->vlib_main, flow_report_process_node.index,
92 VLIB_NODE_STATE_DISABLED);
95 vec_free (fr->rewrite);
96 fr->update_rewrite = 1;
99 if (fr->update_rewrite)
101 fr->rewrite = fr->rewrite_callback (frm, fr,
102 &frm->ipfix_collector,
104 frm->collector_port);
105 fr->update_rewrite = 0;
108 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
111 b0 = vlib_get_buffer (vm, bi0);
113 /* Initialize the buffer */
114 fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
115 vlib_buffer_init_for_free_list (b0, fl);
116 VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
118 ASSERT (vec_len (fr->rewrite) < VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES);
120 clib_memcpy (b0->data, fr->rewrite, vec_len (fr->rewrite));
121 b0->current_data = 0;
122 b0->current_length = vec_len (fr->rewrite);
123 b0->flags |= (VLIB_BUFFER_TOTAL_LENGTH_VALID | VLIB_BUFFER_FLOW_REPORT);
124 vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
125 vnet_buffer (b0)->sw_if_index[VLIB_TX] = frm->fib_index;
127 tp = vlib_buffer_get_current (b0);
128 ip = (ip4_header_t *) &tp->ip4;
129 udp = (udp_header_t *) (ip+1);
130 h = (ipfix_message_header_t *)(udp+1);
132 /* FIXUP: message header export_time */
133 h->export_time = (u32)
134 (((f64)frm->unix_time_0) +
135 (vlib_time_now(frm->vlib_main) - frm->vlib_time_0));
136 h->export_time = clib_host_to_net_u32(h->export_time);
138 stream = &frm->streams[fr->stream_index];
140 /* FIXUP: message header sequence_number. Templates do not increase it */
141 h->sequence_number = clib_host_to_net_u32(stream->sequence_number);
143 /* FIXUP: udp length */
144 udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
146 if (frm->udp_checksum)
148 /* RFC 7011 section 10.3.2. */
149 udp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip);
150 if (udp->checksum == 0)
151 udp->checksum = 0xffff;
154 *buffer_indexp = bi0;
156 fr->last_template_sent = vlib_time_now (vm);
162 flow_report_process (vlib_main_t * vm,
163 vlib_node_runtime_t * rt,
166 flow_report_main_t * frm = &flow_report_main;
168 u32 ip4_lookup_node_index;
169 vlib_node_t * ip4_lookup_node;
170 vlib_frame_t * nf = 0;
177 uword *event_data = 0;
179 /* Wait for Godot... */
180 vlib_process_wait_for_event_or_clock (vm, 1e9);
181 event_type = vlib_process_get_events (vm, &event_data);
183 clib_warning ("bogus kickoff event received, %d", event_type);
184 vec_reset_length (event_data);
186 /* Enqueue pkts to ip4-lookup */
187 ip4_lookup_node = vlib_get_node_by_name (vm, (u8 *) "ip4-lookup");
188 ip4_lookup_node_index = ip4_lookup_node->index;
192 vlib_process_suspend (vm, 5.0);
194 vec_foreach (fr, frm->reports)
196 now = vlib_time_now (vm);
198 /* Need to send a template packet? */
200 now > (fr->last_template_sent + frm->template_interval);
201 send_template += fr->last_template_sent == 0;
206 rv = send_template_packet (frm, fr, &template_bi);
211 nf = vlib_get_frame_to_node (vm, ip4_lookup_node_index);
213 to_next = vlib_frame_vector_args (nf);
215 if (template_bi != ~0)
217 to_next[0] = template_bi;
222 nf = fr->flow_data_callback (frm, fr,
223 nf, to_next, ip4_lookup_node_index);
225 vlib_put_frame_to_node (vm, ip4_lookup_node_index, nf);
229 return 0; /* not so much */
232 VLIB_REGISTER_NODE (flow_report_process_node) = {
233 .function = flow_report_process,
234 .type = VLIB_NODE_TYPE_PROCESS,
235 .name = "flow-report-process",
238 int vnet_flow_report_add_del (flow_report_main_t *frm,
239 vnet_flow_report_add_del_args_t *a)
242 int found_index = ~0;
244 flow_report_stream_t * stream;
247 si = find_stream(a->domain_id, a->src_port);
249 return VNET_API_ERROR_INVALID_VALUE;
250 if (si == -1 && a->is_add == 0)
251 return VNET_API_ERROR_NO_SUCH_ENTRY;
253 for (i = 0; i < vec_len(frm->reports); i++)
255 fr = vec_elt_at_index (frm->reports, i);
256 if (fr->opaque.as_uword == a->opaque.as_uword
257 && fr->rewrite_callback == a->rewrite_callback
258 && fr->flow_data_callback == a->flow_data_callback)
267 if (found_index != ~0)
269 vec_delete (frm->reports, 1, found_index);
270 stream = &frm->streams[si];
272 if (stream->n_reports == 0)
276 return VNET_API_ERROR_NO_SUCH_ENTRY;
279 if (found_index != ~0)
280 return VNET_API_ERROR_VALUE_EXIST;
284 stream = add_stream();
285 stream->domain_id = a->domain_id;
286 stream->src_port = a->src_port;
287 stream->sequence_number = 0;
288 stream->n_reports = 0;
289 si = stream - frm->streams;
292 stream = &frm->streams[si];
296 vec_add2 (frm->reports, fr, 1);
298 fr->stream_index = si;
299 fr->template_id = 256 + stream->next_template_no;
300 stream->next_template_no = (stream->next_template_no + 1) % (65536 - 256);
301 fr->update_rewrite = 1;
302 fr->opaque = a->opaque;
303 fr->rewrite_callback = a->rewrite_callback;
304 fr->flow_data_callback = a->flow_data_callback;
309 clib_error_t * flow_report_add_del_error_to_clib_error (int error)
315 case VNET_API_ERROR_NO_SUCH_ENTRY:
316 return clib_error_return (0, "Flow report not found");
317 case VNET_API_ERROR_VALUE_EXIST:
318 return clib_error_return (0, "Flow report already exists");
319 case VNET_API_ERROR_INVALID_VALUE:
320 return clib_error_return (0, "Expecting either still unused values "
321 "for both domain_id and src_port "
322 "or already used values for both fields");
324 return clib_error_return (0, "vnet_flow_report_add_del returned %d",
329 void vnet_flow_reports_reset (flow_report_main_t * frm)
334 for (i = 0; i < vec_len(frm->streams); i++)
335 if (stream_index_valid(i))
336 frm->streams[i].sequence_number = 0;
338 vec_foreach (fr, frm->reports)
340 fr->update_rewrite = 1;
341 fr->last_template_sent = 0;
345 void vnet_stream_reset (flow_report_main_t * frm, u32 stream_index)
349 frm->streams[stream_index].sequence_number = 0;
351 vec_foreach (fr, frm->reports)
352 if (frm->reports->stream_index == stream_index) {
353 fr->update_rewrite = 1;
354 fr->last_template_sent = 0;
358 int vnet_stream_change (flow_report_main_t * frm,
359 u32 old_domain_id, u16 old_src_port,
360 u32 new_domain_id, u16 new_src_port)
362 i32 stream_index = find_stream (old_domain_id, old_src_port);
363 if (stream_index < 0)
365 flow_report_stream_t * stream = &frm->streams[stream_index];
366 stream->domain_id = new_domain_id;
367 stream->src_port = new_src_port;
368 if (old_domain_id != new_domain_id || old_src_port != new_src_port)
369 vnet_stream_reset (frm, stream_index);
373 static clib_error_t *
374 set_ipfix_exporter_command_fn (vlib_main_t * vm,
375 unformat_input_t * input,
376 vlib_cli_command_t * cmd)
378 flow_report_main_t * frm = &flow_report_main;
379 ip4_address_t collector, src;
380 u16 collector_port = UDP_DST_PORT_ipfix;
384 collector.as_u32 = 0;
386 u32 path_mtu = 512; // RFC 7011 section 10.3.3.
387 u32 template_interval = 20;
390 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
391 if (unformat (input, "collector %U", unformat_ip4_address, &collector))
393 else if (unformat (input, "port %u", &collector_port))
395 else if (unformat (input, "src %U", unformat_ip4_address, &src))
397 else if (unformat (input, "fib-id %u", &fib_id))
399 ip4_main_t * im = &ip4_main;
400 uword * p = hash_get (im->fib_index_by_table_id, fib_id);
402 return clib_error_return (0, "fib ID %d doesn't exist\n",
406 else if (unformat (input, "path-mtu %u", &path_mtu))
408 else if (unformat (input, "template-interval %u", &template_interval))
410 else if (unformat (input, "udp-checksum"))
416 if (collector.as_u32 == 0)
417 return clib_error_return (0, "collector address required");
420 return clib_error_return (0, "src address required");
422 if (path_mtu > 1450 /* vpp does not support fragmentation */)
423 return clib_error_return (0, "too big path-mtu value, maximum is 1450");
426 return clib_error_return (0, "too small path-mtu value, minimum is 68");
428 /* Reset report streams if we are reconfiguring IP addresses */
429 if (frm->ipfix_collector.as_u32 != collector.as_u32 ||
430 frm->src_address.as_u32 != src.as_u32 ||
431 frm->collector_port != collector_port)
432 vnet_flow_reports_reset(frm);
434 frm->ipfix_collector.as_u32 = collector.as_u32;
435 frm->collector_port = collector_port;
436 frm->src_address.as_u32 = src.as_u32;
437 frm->fib_index = fib_index;
438 frm->path_mtu = path_mtu;
439 frm->template_interval = template_interval;
440 frm->udp_checksum = udp_checksum;
442 vlib_cli_output (vm, "Collector %U, src address %U, "
443 "fib index %d, path MTU %u, "
444 "template resend interval %us, "
446 format_ip4_address, &frm->ipfix_collector,
447 format_ip4_address, &frm->src_address,
448 fib_index, path_mtu, template_interval,
449 udp_checksum ? "enabled" : "disabled");
451 /* Turn on the flow reporting process */
452 vlib_process_signal_event (vm, flow_report_process_node.index,
457 VLIB_CLI_COMMAND (set_ipfix_exporter_command, static) = {
458 .path = "set ipfix exporter",
459 .short_help = "set ipfix exporter "
460 "collector <ip4-address> [port <port>] "
461 "src <ip4-address> [fib-id <fib-id>] "
462 "[path-mtu <path-mtu>] "
463 "[template-interval <template-interval>]",
465 .function = set_ipfix_exporter_command_fn,
468 static clib_error_t *
469 flow_report_init (vlib_main_t *vm)
471 flow_report_main_t * frm = &flow_report_main;
474 frm->vnet_main = vnet_get_main();
475 frm->unix_time_0 = time(0);
476 frm->vlib_time_0 = vlib_time_now(frm->vlib_main);
482 VLIB_INIT_FUNCTION (flow_report_init)