2 * Copyright (c) 2017 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.
16 #include <vlib/vlib.h>
17 #include <vnet/vnet.h>
18 #include <vnet/pg/pg.h>
19 #include <vppinfra/error.h>
20 #include <ioam/ipfixcollector/ipfixcollector.h>
21 #include <vnet/ipfix-export/ipfix_packet.h>
23 #define foreach_ipfix_collector_error \
24 _(PROCESSED, "Number of IP-Fix packets processed") \
25 _(NO_LISTENER, "Number of IP-Fix packets with no listener")
29 #define _(sym,str) IPFIX_COLLECTOR_ERROR_##sym,
30 foreach_ipfix_collector_error
32 IPFIX_COLLECTOR_N_ERROR,
35 static char *ipfix_collector_error_strings[] = {
36 #define _(sym,string) string,
37 foreach_ipfix_collector_error
43 IPFIX_COLLECTOR_NEXT_DROP,
44 IPFIX_COLLECTOR_N_NEXT,
45 } ipfix_collector_next_t;
52 } ipfix_collector_trace_t;
54 vlib_node_registration_t ipfix_collector_node;
56 /* packet trace format function */
58 format_ipfix_collector_trace (u8 * s, va_list * args)
60 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
61 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
62 ipfix_collector_trace_t *t = va_arg (*args, ipfix_collector_trace_t *);
65 "IPFIX_COLLECTOR: set_id %u, next_node %u", t->set_id,
71 * @brief Node to receive IP-Fix packets.
72 * @node ipfix-collector
74 * This function receives IP-FIX packets and forwards them to other graph nodes
75 * based on SetID field in IP-FIX.
77 * @param vm vlib_main_t corresponding to the current thread.
78 * @param node vlib_node_runtime_t data for this node.
79 * @param frame vlib_frame_t whose contents should be dispatched.
81 * @par Graph mechanics: buffer, next index usage
84 * - <code>vlib_buffer_get_current(p0)</code>
85 * - Parses IP-Fix packet to extract SetId which will be used to decide
86 * next node where packets should be enqueued.
88 * <em>Next Index:</em>
89 * - Dispatches the packet to other VPP graph nodes based on their registartion
90 * for the IP-Fix SetId using API ipfix_collector_reg_setid().
93 ipfix_collector_node_fn (vlib_main_t * vm,
94 vlib_node_runtime_t * node,
95 vlib_frame_t * from_frame)
97 u32 n_left_from, next_index, *from, *to_next;
98 word n_no_listener = 0;
101 from = vlib_frame_vector_args (from_frame);
102 n_left_from = from_frame->n_vectors;
104 next_index = node->cached_next_index;
106 while (n_left_from > 0)
110 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
112 while (n_left_from >= 4 && n_left_to_next >= 2)
115 vlib_buffer_t *b0, *b1;
117 ipfix_message_header_t *ipfix0, *ipfix1;
118 ipfix_set_header_t *set0, *set1;
119 u16 set_id0, set_id1;
120 ipfix_client *client0, *client1;
122 /* Prefetch next iteration. */
124 vlib_buffer_t *p2, *p3;
126 p2 = vlib_get_buffer (vm, from[2]);
127 p3 = vlib_get_buffer (vm, from[3]);
129 vlib_prefetch_buffer_header (p2, LOAD);
130 vlib_prefetch_buffer_header (p3, LOAD);
132 CLIB_PREFETCH (p2->data,
133 (sizeof (ipfix_message_header_t) +
134 sizeof (ipfix_set_header_t)), LOAD);
135 CLIB_PREFETCH (p3->data,
136 (sizeof (ipfix_message_header_t) +
137 sizeof (ipfix_set_header_t)), LOAD);
149 b0 = vlib_get_buffer (vm, bi0);
150 b1 = vlib_get_buffer (vm, bi1);
152 ipfix0 = vlib_buffer_get_current (b0);
153 ipfix1 = vlib_buffer_get_current (b1);
155 set0 = (ipfix_set_header_t *) (ipfix0 + 1);
156 set1 = (ipfix_set_header_t *) (ipfix1 + 1);
158 set_id0 = (u16) (clib_net_to_host_u32 (set0->set_id_length) >> 16);
159 set_id1 = (u16) (clib_net_to_host_u32 (set1->set_id_length) >> 16);
161 client0 = ipfix_collector_get_client (set_id0);
162 client1 = ipfix_collector_get_client (set_id1);
164 if (PREDICT_TRUE (NULL != client0))
166 next0 = client0->client_next_node;
171 next0 = IPFIX_COLLECTOR_NEXT_DROP;
175 if (PREDICT_TRUE (NULL != client1))
177 next1 = client1->client_next_node;
182 next1 = IPFIX_COLLECTOR_NEXT_DROP;
186 vlib_buffer_advance (b0,
187 (sizeof (ipfix_message_header_t)
188 + sizeof (ipfix_set_header_t)));
189 vlib_buffer_advance (b1,
190 (sizeof (ipfix_message_header_t)
191 + sizeof (ipfix_set_header_t)));
193 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
195 ipfix_collector_trace_t *tr = vlib_add_trace (vm, node,
197 tr->next_node = (client0 ? client0->client_node : 0xFFFFFFFF);
198 tr->set_id = set_id0;
200 if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
202 ipfix_collector_trace_t *tr = vlib_add_trace (vm, node,
204 tr->next_node = (client1 ? client1->client_node : 0xFFFFFFFF);
205 tr->set_id = set_id1;
208 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
209 to_next, n_left_to_next,
210 bi0, bi1, next0, next1);
213 while (n_left_from > 0 && n_left_to_next > 0)
218 ipfix_message_header_t *ipfix0;
219 ipfix_set_header_t *set0;
221 ipfix_client *client0;
230 b0 = vlib_get_buffer (vm, bi0);
231 ipfix0 = vlib_buffer_get_current (b0);
233 set0 = (ipfix_set_header_t *) (ipfix0 + 1);
235 set_id0 = (u16) (clib_net_to_host_u32 (set0->set_id_length) >> 16);
237 client0 = ipfix_collector_get_client (set_id0);
239 if (PREDICT_TRUE (NULL != client0))
241 next0 = client0->client_next_node;
246 next0 = IPFIX_COLLECTOR_NEXT_DROP;
250 vlib_buffer_advance (b0,
251 (sizeof (ipfix_message_header_t)
252 + sizeof (ipfix_set_header_t)));
253 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
255 ipfix_collector_trace_t *tr = vlib_add_trace (vm, node,
257 tr->next_node = (client0 ? client0->client_node : 0xFFFFFFFF);
258 tr->set_id = set_id0;
261 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
262 to_next, n_left_to_next,
266 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
268 vlib_error_count (vm, node->node_index,
269 IPFIX_COLLECTOR_ERROR_NO_LISTENER, n_no_listener);
270 vlib_error_count (vm, node->node_index,
271 IPFIX_COLLECTOR_ERROR_PROCESSED, n_listener);
272 return from_frame->n_vectors;
276 VLIB_REGISTER_NODE (ipfix_collector_node) = {
277 .function = ipfix_collector_node_fn,
278 .name = "ipfix-collector",
279 .vector_size = sizeof (u32),
280 .format_trace = format_ipfix_collector_trace,
281 .type = VLIB_NODE_TYPE_INTERNAL,
283 .n_errors = ARRAY_LEN(ipfix_collector_error_strings),
284 .error_strings = ipfix_collector_error_strings,
286 .n_next_nodes = IPFIX_COLLECTOR_N_NEXT,
288 /* edit / add dispositions here */
290 [IPFIX_COLLECTOR_NEXT_DROP] = "error-drop",
296 * fd.io coding-style-patch-verification: ON
299 * eval: (c-set-style "gnu")