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 <vppinfra/pcap.h>
47 #include <vnet/interface.h>
48 #include <vnet/gso/gro.h>
50 extern vnet_device_class_t pg_dev_class;
55 typedef struct pg_edit_group_t
57 /* Edits in this group. */
60 /* Vector of non-fixed edits for this group. */
61 pg_edit_t *non_fixed_edits;
63 /* Fixed edits for this group. */
64 u8 *fixed_packet_data;
65 u8 *fixed_packet_data_mask;
67 /* Byte offset where packet data begins. */
68 u32 start_byte_offset;
70 /* Number of packet bytes for this edit group. */
73 /* Function to perform miscellaneous edits (e.g. set IP checksum, ...). */
74 void (*edit_function) (struct pg_main_t * pg,
75 struct pg_stream_t * s,
76 struct pg_edit_group_t * g,
77 u32 * buffers, u32 n_buffers);
79 /* Opaque data for edit function's use. */
80 uword edit_function_opaque;
83 /* Packets are made of multiple buffers chained together.
84 This struct keeps track of data per-chain index. */
87 /* Vector of buffer edits for this stream and buffer index. */
90 /* Buffers pre-initialized with fixed buffer data for this stream. */
95 typedef struct pg_stream_t
102 /* Stream is currently enabled. */
103 #define PG_STREAM_FLAGS_IS_ENABLED (1 << 0)
105 /* Edit groups are created by each protocol level (e.g. ethernet,
107 pg_edit_group_t *edit_groups;
109 pg_edit_type_t packet_size_edit_type;
111 /* Min/max packet size. */
112 u32 min_packet_bytes, max_packet_bytes;
114 /* Vector of non-fixed edits for this stream.
115 All fixed edits are performed and placed into fixed_packet_data. */
116 pg_edit_t *non_fixed_edits;
118 /* Packet data with all fixed edits performed.
119 All packets in stream are initialized according with this data.
120 Mask specifies which bits of packet data are covered by fixed edits. */
121 u8 *fixed_packet_data, *fixed_packet_data_mask;
123 /* Size to use for buffers. 0 means use buffers big enough
124 for max_packet_bytes. */
127 /* Buffer flags to set in each packet e.g. checksum offload flags */
130 /* Last packet length if packet size edit type is increment. */
131 u32 last_increment_packet_size;
133 /* Index into main interface pool for this stream. */
136 /* Interface used to mark packets for this stream. May be different
137 than hw/sw index from pg main interface pool. They will be
138 different if this stream is being used generate buffers as if
139 they were received on a non-pg interface. For example, suppose you
140 are trying to test vlan code and you want to generate buffers that
141 appear to come from an ethernet interface. */
142 u32 sw_if_index[VLIB_N_RX_TX];
144 /* Node where stream's buffers get put. */
147 /* Worker thread index */
150 /* Output next index to reach output node from stream input node. */
155 /* Number of packets currently generated. */
156 u64 n_packets_generated;
158 /* Stream is disabled when packet limit is reached.
159 Zero means no packet limit. */
162 /* Only generate up to n_max_frame per frame. */
165 /* Rate for this stream in packets/second.
166 Zero means unlimited rate. */
167 f64 rate_packets_per_second;
169 f64 time_last_generate;
171 f64 packet_accumulator;
173 pg_buffer_index_t *buffer_indices;
175 u8 **replay_packet_templates;
176 u64 *replay_packet_timestamps;
177 u32 current_replay_packet_index;
181 pg_buffer_index_free (pg_buffer_index_t * bi)
183 vec_free (bi->edits);
184 clib_fifo_free (bi->buffer_fifo);
188 pg_edit_group_free (pg_edit_group_t * g)
191 vec_foreach (e, g->edits) pg_edit_free (e);
193 vec_free (g->fixed_packet_data);
194 vec_free (g->fixed_packet_data_mask);
198 pg_stream_free (pg_stream_t * s)
203 vec_foreach (e, s->non_fixed_edits) pg_edit_free (e);
204 vec_free (s->non_fixed_edits);
205 vec_foreach (g, s->edit_groups) pg_edit_group_free (g);
206 vec_free (s->edit_groups);
207 vec_free (s->fixed_packet_data);
208 vec_free (s->fixed_packet_data_mask);
210 for (i = 0; i < vec_len (s->replay_packet_templates); i++)
211 vec_free (s->replay_packet_templates[i]);
212 vec_free (s->replay_packet_templates);
213 vec_free (s->replay_packet_timestamps);
216 pg_buffer_index_t *bi;
217 vec_foreach (bi, s->buffer_indices) pg_buffer_index_free (bi);
218 vec_free (s->buffer_indices);
223 pg_stream_is_enabled (pg_stream_t * s)
225 return (s->flags & PG_STREAM_FLAGS_IS_ENABLED) != 0;
228 always_inline pg_edit_group_t *
229 pg_stream_get_group (pg_stream_t * s, u32 group_index)
231 return vec_elt_at_index (s->edit_groups, group_index);
235 pg_create_edit_group (pg_stream_t * s,
236 int n_edit_bytes, int n_packet_bytes, u32 * group_index)
241 vec_add2 (s->edit_groups, g, 1);
243 *group_index = g - s->edit_groups;
245 ASSERT (n_edit_bytes % sizeof (pg_edit_t) == 0);
246 n_edits = n_edit_bytes / sizeof (pg_edit_t);
247 vec_resize (g->edits, n_edits);
249 g->n_packet_bytes = n_packet_bytes;
255 pg_add_edits (pg_stream_t * s, int n_edit_bytes, int n_packet_bytes,
258 pg_edit_group_t *g = pg_stream_get_group (s, group_index);
261 ASSERT (n_edit_bytes % sizeof (pg_edit_t) == 0);
262 n_edits = n_edit_bytes / sizeof (pg_edit_t);
263 vec_add2 (g->edits, e, n_edits);
264 g->n_packet_bytes += n_packet_bytes;
269 pg_get_edit_group (pg_stream_t * s, u32 group_index)
271 pg_edit_group_t *g = pg_stream_get_group (s, group_index);
275 /* Number of bytes for all groups >= given group. */
277 pg_edit_group_n_bytes (pg_stream_t * s, u32 group_index)
282 for (g = s->edit_groups + group_index; g < vec_end (s->edit_groups); g++)
283 n_bytes += g->n_packet_bytes;
288 pg_free_edit_group (pg_stream_t * s)
290 uword i = vec_len (s->edit_groups) - 1;
291 pg_edit_group_t *g = pg_stream_get_group (s, i);
293 pg_edit_group_free (g);
294 clib_memset (g, 0, sizeof (g[0]));
295 _vec_len (s->edit_groups) = i;
303 /* VLIB interface indices. */
304 u32 hw_if_index, sw_if_index;
306 /* Identifies stream for this interface. */
310 gro_flow_table_t *flow_table;
313 pcap_main_t pcap_main;
314 char *pcap_file_name;
317 /* Per VLIB node data. */
320 /* Parser function indexed by node index. */
321 unformat_function_t *unformat_edit;
324 typedef struct pg_main_t
326 /* Pool of streams. */
327 pg_stream_t *streams;
329 /* Bitmap indicating which streams are currently enabled. */
330 uword **enabled_streams;
332 /* Hash mapping name -> stream index. */
333 uword *stream_index_by_name;
335 /* Pool of interfaces. */
336 pg_interface_t *interfaces;
337 uword *if_index_by_if_id;
339 /* Vector of buffer indices for use in pg_stream_fill_replay, per thread */
340 u32 **replay_buffers_by_thread;
342 /* Per VLIB node information. */
346 /* Global main structure. */
347 extern pg_main_t pg_main;
350 extern vlib_node_registration_t pg_input_node;
352 /* Buffer generator input, output node functions. */
353 vlib_node_function_t pg_input, pg_output;
355 /* Stream add/delete. */
356 void pg_stream_del (pg_main_t * pg, uword index);
357 void pg_stream_add (pg_main_t * pg, pg_stream_t * s_init);
358 void pg_stream_change (pg_main_t * pg, pg_stream_t * s);
360 /* Enable/disable stream. */
361 void pg_stream_enable_disable (pg_main_t * pg, pg_stream_t * s,
364 /* Enable/disable packet coalesce on given interface */
365 void pg_interface_enable_disable_coalesce (pg_interface_t * pi, u8 enable,
368 /* Find/create free packet-generator interface index. */
369 u32 pg_interface_add_or_get (pg_main_t * pg, uword stream_index,
370 u8 gso_enabled, u32 gso_size,
371 u8 coalesce_enabled);
373 always_inline pg_node_t *
374 pg_get_node (uword node_index)
376 pg_main_t *pg = &pg_main;
377 vec_validate (pg->nodes, node_index);
378 return pg->nodes + node_index;
381 void pg_edit_group_get_fixed_packet_data (pg_stream_t * s,
383 void *fixed_packet_data,
384 void *fixed_packet_data_mask);
386 void pg_enable_disable (u32 stream_index, int is_enable);
393 char *pcap_file_name;
397 clib_error_t *pg_capture (pg_capture_args_t * a);
401 vlib_buffer_t buffer;
406 #endif /* included_vlib_pg_h */
409 * fd.io coding-style-patch-verification: ON
412 * eval: (c-set-style "gnu")