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 int send_template_packet (flow_report_main_t *frm,
27 ip4_ipfix_template_packet_t * tp;
28 ipfix_message_header_t * h;
31 vlib_main_t * vm = frm->vlib_main;
33 ASSERT (buffer_indexp);
35 if (fr->update_rewrite || fr->rewrite == 0)
37 if (frm->ipfix_collector.as_u32 == 0
38 || frm->src_address.as_u32 == 0)
40 clib_warning ("no collector: disabling flow collector process");
41 vlib_node_set_state (frm->vlib_main, flow_report_process_node.index,
42 VLIB_NODE_STATE_DISABLED);
45 vec_free (fr->rewrite);
46 fr->update_rewrite = 1;
49 if (fr->update_rewrite)
51 fr->rewrite = fr->rewrite_callback (frm, fr,
52 &frm->ipfix_collector,
55 fr->update_rewrite = 0;
58 if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
61 b0 = vlib_get_buffer (vm, bi0);
63 ASSERT (vec_len (fr->rewrite) < VLIB_BUFFER_DEFAULT_FREE_LIST_BYTES);
65 clib_memcpy (b0->data, fr->rewrite, vec_len (fr->rewrite));
67 b0->current_length = vec_len (fr->rewrite);
68 b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
69 vnet_buffer (b0)->sw_if_index[VLIB_RX] = 0;
70 vnet_buffer (b0)->sw_if_index[VLIB_TX] = frm->fib_index;
72 tp = vlib_buffer_get_current (b0);
73 ip = (ip4_header_t *) &tp->ip4;
74 udp = (udp_header_t *) (ip+1);
75 h = (ipfix_message_header_t *)(udp+1);
77 /* FIXUP: message header export_time */
78 h->export_time = (u32)
79 (((f64)frm->unix_time_0) +
80 (vlib_time_now(frm->vlib_main) - frm->vlib_time_0));
81 h->export_time = clib_host_to_net_u32(h->export_time);
83 /* FIXUP: message header sequence_number. Templates do not increase it */
84 h->sequence_number = clib_host_to_net_u32(fr->sequence_number);
86 /* FIXUP: udp length */
87 udp->length = clib_host_to_net_u16 (b0->current_length - sizeof (*ip));
91 fr->last_template_sent = vlib_time_now (vm);
97 flow_report_process (vlib_main_t * vm,
98 vlib_node_runtime_t * rt,
101 flow_report_main_t * frm = &flow_report_main;
103 u32 ip4_lookup_node_index;
104 vlib_node_t * ip4_lookup_node;
105 vlib_frame_t * nf = 0;
112 uword *event_data = 0;
114 /* Wait for Godot... */
115 vlib_process_wait_for_event_or_clock (vm, 1e9);
116 event_type = vlib_process_get_events (vm, &event_data);
118 clib_warning ("bogus kickoff event received, %d", event_type);
119 vec_reset_length (event_data);
121 /* Enqueue pkts to ip4-lookup */
122 ip4_lookup_node = vlib_get_node_by_name (vm, (u8 *) "ip4-lookup");
123 ip4_lookup_node_index = ip4_lookup_node->index;
127 vlib_process_suspend (vm, 5.0);
129 vec_foreach (fr, frm->reports)
131 now = vlib_time_now (vm);
133 /* Need to send a template packet? */
135 now > (fr->last_template_sent + frm->template_interval);
136 send_template += fr->last_template_sent == 0;
141 rv = send_template_packet (frm, fr, &template_bi);
146 nf = vlib_get_frame_to_node (vm, ip4_lookup_node_index);
148 to_next = vlib_frame_vector_args (nf);
150 if (template_bi != ~0)
152 to_next[0] = template_bi;
157 nf = fr->flow_data_callback (frm, fr,
158 nf, to_next, ip4_lookup_node_index);
160 vlib_put_frame_to_node (vm, ip4_lookup_node_index, nf);
164 return 0; /* not so much */
167 VLIB_REGISTER_NODE (flow_report_process_node) = {
168 .function = flow_report_process,
169 .type = VLIB_NODE_TYPE_PROCESS,
170 .name = "flow-report-process",
173 int vnet_flow_report_add_del (flow_report_main_t *frm,
174 vnet_flow_report_add_del_args_t *a)
177 int found_index = ~0;
180 for (i = 0; i < vec_len(frm->reports); i++)
182 fr = vec_elt_at_index (frm->reports, i);
183 if (fr->opaque == a->opaque
184 && fr->rewrite_callback == a->rewrite_callback
185 && fr->flow_data_callback == a->flow_data_callback)
194 if (found_index != ~0)
196 vec_delete (frm->reports, 1, found_index);
199 return VNET_API_ERROR_NO_SUCH_ENTRY;
202 vec_add2 (frm->reports, fr, 1);
204 fr->sequence_number = 0;
205 fr->domain_id = a->domain_id;
206 fr->update_rewrite = 1;
207 fr->opaque = a->opaque;
208 fr->rewrite_callback = a->rewrite_callback;
209 fr->flow_data_callback = a->flow_data_callback;
214 void vnet_flow_reports_reset (flow_report_main_t * frm)
217 vec_foreach (fr, frm->reports)
219 fr->sequence_number = 0;
220 fr->update_rewrite = 1;
221 fr->last_template_sent = 0;
225 static clib_error_t *
226 set_ipfix_command_fn (vlib_main_t * vm,
227 unformat_input_t * input,
228 vlib_cli_command_t * cmd)
230 flow_report_main_t * frm = &flow_report_main;
231 ip4_address_t collector, src;
232 u16 collector_port = UDP_DST_PORT_ipfix;
236 collector.as_u32 = 0;
238 u32 path_mtu = 512; // RFC 7011 section 10.3.3.
239 u32 template_interval = 20;
241 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) {
242 if (unformat (input, "collector %U", unformat_ip4_address, &collector))
244 else if (unformat (input, "port %u", &collector_port))
246 else if (unformat (input, "src %U", unformat_ip4_address, &src))
248 else if (unformat (input, "fib-id %u", &fib_id))
250 ip4_main_t * im = &ip4_main;
251 uword * p = hash_get (im->fib_index_by_table_id, fib_id);
253 return clib_error_return (0, "fib ID %d doesn't exist\n",
257 else if (unformat (input, "path-mtu %u", &path_mtu))
259 else if (unformat (input, "template-interval %u", &template_interval))
265 if (collector.as_u32 == 0)
266 return clib_error_return (0, "collector address required");
269 return clib_error_return (0, "src address required");
271 if (path_mtu > 1450 /* vpp does not support fragmentation */)
272 return clib_error_return (0, "too big path-mtu value, maximum is 1450");
275 return clib_error_return (0, "too small path-mtu value, minimum is 68");
277 /* Reset report streams if we are reconfiguring IP addresses */
278 if (frm->ipfix_collector.as_u32 != collector.as_u32 ||
279 frm->src_address.as_u32 != src.as_u32 ||
280 frm->collector_port != collector_port)
281 vnet_flow_reports_reset(frm);
283 frm->ipfix_collector.as_u32 = collector.as_u32;
284 frm->collector_port = collector_port;
285 frm->src_address.as_u32 = src.as_u32;
286 frm->fib_index = fib_index;
287 frm->path_mtu = path_mtu;
288 frm->template_interval = template_interval;
290 vlib_cli_output (vm, "Collector %U, src address %U, "
291 "fib index %d, path MTU %u, "
292 "template resend interval %us",
293 format_ip4_address, &frm->ipfix_collector,
294 format_ip4_address, &frm->src_address,
295 fib_index, path_mtu, template_interval);
297 /* Turn on the flow reporting process */
298 vlib_process_signal_event (vm, flow_report_process_node.index,
303 VLIB_CLI_COMMAND (set_ipfix_command, static) = {
305 .short_help = "set ipfix collector <ip4-address> "
307 "src <ip4-address> [fib-id <fib-id>] "
308 "[path-mtu <path-mtu>] "
309 "[template-interval <template-interval>]",
310 .function = set_ipfix_command_fn,
313 static clib_error_t *
314 flow_report_init (vlib_main_t *vm)
316 flow_report_main_t * frm = &flow_report_main;
319 frm->vnet_main = vnet_get_main();
320 frm->unix_time_0 = time(0);
321 frm->vlib_time_0 = vlib_time_now(frm->vlib_main);
326 VLIB_INIT_FUNCTION (flow_report_init)