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.
16 * pg.h: VLIB packet generator
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #ifndef included_vlib_pg_h
41 #define included_vlib_pg_h
43 #include <vlib/vlib.h> /* for VLIB_N_RX_TX */
44 #include <vnet/pg/edit.h>
45 #include <vppinfra/fifo.h> /* for buffer_fifo */
46 #include <vnet/unix/pcap.h>
47 #include <vnet/interface.h>
49 extern vnet_device_class_t pg_dev_class;
54 typedef struct pg_edit_group_t
56 /* Edits in this group. */
59 /* Vector of non-fixed edits for this group. */
60 pg_edit_t *non_fixed_edits;
62 /* Fixed edits for this group. */
63 u8 *fixed_packet_data;
64 u8 *fixed_packet_data_mask;
66 /* Byte offset where packet data begins. */
67 u32 start_byte_offset;
69 /* Number of packet bytes for this edit group. */
72 /* Function to perform miscellaneous edits (e.g. set IP checksum, ...). */
73 void (*edit_function) (struct pg_main_t * pg,
74 struct pg_stream_t * s,
75 struct pg_edit_group_t * g,
76 u32 * buffers, u32 n_buffers);
78 /* Opaque data for edit function's use. */
79 uword edit_function_opaque;
82 /* Packets are made of multiple buffers chained together.
83 This struct keeps track of data per-chain index. */
86 /* Vector of buffer edits for this stream and buffer index. */
89 /* Buffers pre-initialized with fixed buffer data for this stream. */
92 /* Buffer free list for this buffer index in stream. */
93 vlib_buffer_free_list_index_t free_list_index;
96 typedef struct pg_stream_t
103 /* Stream is currently enabled. */
104 #define PG_STREAM_FLAGS_IS_ENABLED (1 << 0)
105 #define PG_STREAM_FLAGS_DISABLE_BUFFER_RECYCLE (1 << 1)
107 /* Edit groups are created by each protocol level (e.g. ethernet,
109 pg_edit_group_t *edit_groups;
111 pg_edit_type_t packet_size_edit_type;
113 /* Min/max packet size. */
114 u32 min_packet_bytes, max_packet_bytes;
116 /* Vector of non-fixed edits for this stream.
117 All fixed edits are performed and placed into fixed_packet_data. */
118 pg_edit_t *non_fixed_edits;
120 /* Packet data with all fixed edits performed.
121 All packets in stream are initialized according with this data.
122 Mask specifies which bits of packet data are covered by fixed edits. */
123 u8 *fixed_packet_data, *fixed_packet_data_mask;
125 /* Size to use for buffers. 0 means use buffers big enough
126 for max_packet_bytes. */
129 /* Last packet length if packet size edit type is increment. */
130 u32 last_increment_packet_size;
132 /* Index into main interface pool for this stream. */
135 /* Interface used to mark packets for this stream. May be different
136 than hw/sw index from pg main interface pool. They will be
137 different if this stream is being used generate buffers as if
138 they were received on a non-pg interface. For example, suppose you
139 are trying to test vlan code and you want to generate buffers that
140 appear to come from an ethernet interface. */
141 u32 sw_if_index[VLIB_N_RX_TX];
143 /* Node where stream's buffers get put. */
146 /* Worker thread index */
149 /* Output next index to reach output node from stream input node. */
154 /* Number of packets currently generated. */
155 u64 n_packets_generated;
157 /* Stream is disabled when packet limit is reached.
158 Zero means no packet limit. */
161 /* Rate for this stream in packets/second.
162 Zero means unlimited rate. */
163 f64 rate_packets_per_second;
165 f64 time_last_generate;
167 f64 packet_accumulator;
169 pg_buffer_index_t *buffer_indices;
171 u8 **replay_packet_templates;
172 u64 *replay_packet_timestamps;
173 u32 current_replay_packet_index;
177 pg_buffer_index_free (pg_buffer_index_t * bi)
179 vec_free (bi->edits);
180 clib_fifo_free (bi->buffer_fifo);
184 pg_edit_group_free (pg_edit_group_t * g)
187 vec_foreach (e, g->edits) pg_edit_free (e);
189 vec_free (g->fixed_packet_data);
190 vec_free (g->fixed_packet_data_mask);
194 pg_stream_free (pg_stream_t * s)
199 vec_foreach (e, s->non_fixed_edits) pg_edit_free (e);
200 vec_free (s->non_fixed_edits);
201 vec_foreach (g, s->edit_groups) pg_edit_group_free (g);
202 vec_free (s->edit_groups);
203 vec_free (s->fixed_packet_data);
204 vec_free (s->fixed_packet_data_mask);
206 for (i = 0; i < vec_len (s->replay_packet_templates); i++)
207 vec_free (s->replay_packet_templates[i]);
208 vec_free (s->replay_packet_templates);
209 vec_free (s->replay_packet_timestamps);
212 pg_buffer_index_t *bi;
213 vec_foreach (bi, s->buffer_indices) pg_buffer_index_free (bi);
214 vec_free (s->buffer_indices);
219 pg_stream_is_enabled (pg_stream_t * s)
221 return (s->flags & PG_STREAM_FLAGS_IS_ENABLED) != 0;
224 always_inline pg_edit_group_t *
225 pg_stream_get_group (pg_stream_t * s, u32 group_index)
227 return vec_elt_at_index (s->edit_groups, group_index);
231 pg_create_edit_group (pg_stream_t * s,
232 int n_edit_bytes, int n_packet_bytes, u32 * group_index)
237 vec_add2 (s->edit_groups, g, 1);
239 *group_index = g - s->edit_groups;
241 ASSERT (n_edit_bytes % sizeof (pg_edit_t) == 0);
242 n_edits = n_edit_bytes / sizeof (pg_edit_t);
243 vec_resize (g->edits, n_edits);
245 g->n_packet_bytes = n_packet_bytes;
251 pg_add_edits (pg_stream_t * s, int n_edit_bytes, int n_packet_bytes,
254 pg_edit_group_t *g = pg_stream_get_group (s, group_index);
257 ASSERT (n_edit_bytes % sizeof (pg_edit_t) == 0);
258 n_edits = n_edit_bytes / sizeof (pg_edit_t);
259 vec_add2 (g->edits, e, n_edits);
260 g->n_packet_bytes += n_packet_bytes;
265 pg_get_edit_group (pg_stream_t * s, u32 group_index)
267 pg_edit_group_t *g = pg_stream_get_group (s, group_index);
271 /* Number of bytes for all groups >= given group. */
273 pg_edit_group_n_bytes (pg_stream_t * s, u32 group_index)
278 for (g = s->edit_groups + group_index; g < vec_end (s->edit_groups); g++)
279 n_bytes += g->n_packet_bytes;
284 pg_free_edit_group (pg_stream_t * s)
286 uword i = vec_len (s->edit_groups) - 1;
287 pg_edit_group_t *g = pg_stream_get_group (s, i);
289 pg_edit_group_free (g);
290 memset (g, 0, sizeof (g[0]));
291 _vec_len (s->edit_groups) = i;
299 /* VLIB interface indices. */
300 u32 hw_if_index, sw_if_index;
302 /* Identifies stream for this interface. */
305 pcap_main_t pcap_main;
309 /* Per VLIB node data. */
312 /* Parser function indexed by node index. */
313 unformat_function_t *unformat_edit;
316 typedef struct pg_main_t
318 /* Pool of streams. */
319 pg_stream_t *streams;
321 /* Bitmap indicating which streams are currently enabled. */
322 uword **enabled_streams;
324 /* Hash mapping name -> stream index. */
325 uword *stream_index_by_name;
327 /* Pool of interfaces. */
328 pg_interface_t *interfaces;
329 uword *if_index_by_if_id;
331 /* Per VLIB node information. */
335 /* Global main structure. */
336 extern pg_main_t pg_main;
339 extern vlib_node_registration_t pg_input_node;
341 /* Buffer generator input, output node functions. */
342 vlib_node_function_t pg_input, pg_output;
344 /* Stream add/delete. */
345 void pg_stream_del (pg_main_t * pg, uword index);
346 void pg_stream_add (pg_main_t * pg, pg_stream_t * s_init);
348 /* Enable/disable stream. */
349 void pg_stream_enable_disable (pg_main_t * pg, pg_stream_t * s,
352 /* Find/create free packet-generator interface index. */
353 u32 pg_interface_add_or_get (pg_main_t * pg, uword stream_index);
355 always_inline pg_node_t *
356 pg_get_node (uword node_index)
358 pg_main_t *pg = &pg_main;
359 vec_validate (pg->nodes, node_index);
360 return pg->nodes + node_index;
363 void pg_edit_group_get_fixed_packet_data (pg_stream_t * s,
365 void *fixed_packet_data,
366 void *fixed_packet_data_mask);
368 void pg_enable_disable (u32 stream_index, int is_enable);
379 clib_error_t *pg_capture (pg_capture_args_t * a);
383 vlib_buffer_t buffer;
388 #endif /* included_vlib_pg_h */
391 * fd.io coding-style-patch-verification: ON
394 * eval: (c-set-style "gnu")