FD.io VPP  v17.01-9-ge7dcee4
Vector Packet Processing
output.c
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1 /*
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:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
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.
14  */
15 /*
16  * pg_output.c: packet generator output
17  *
18  * Copyright (c) 2008 Eliot Dresselhaus
19  *
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:
27  *
28  * The above copyright notice and this permission notice shall be
29  * included in all copies or substantial portions of the Software.
30  *
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.
38  */
39 
40 #include <vlib/vlib.h>
41 #include <vnet/vnet.h>
42 #include <vnet/pg/pg.h>
43 #include <vnet/ethernet/ethernet.h>
44 
45 uword
47 {
48  pg_main_t *pg = &pg_main;
49  u32 *buffers = vlib_frame_args (frame);
50  uword n_buffers = frame->n_vectors;
51  uword n_left = n_buffers;
52  vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
54 
55  if (PREDICT_FALSE (pif->lockp != 0))
56  while (__sync_lock_test_and_set (pif->lockp, 1))
57  ;
58 
59  if (pif->pcap_file_name != 0)
60  {
61  while (n_left > 0)
62  {
63  n_left--;
64  u32 bi0 = buffers[0];
65  buffers++;
66 
67  pcap_add_buffer (&pif->pcap_main, vm, bi0,
69  }
70  pcap_write (&pif->pcap_main);
71  }
72 
73  vlib_buffer_free (vm, vlib_frame_args (frame), n_buffers);
74  if (PREDICT_FALSE (pif->lockp != 0))
75  *pif->lockp = 0;
76  return n_buffers;
77 }
78 
79 /*
80  * fd.io coding-style-patch-verification: ON
81  *
82  * Local Variables:
83  * eval: (c-set-style "gnu")
84  * End:
85  */
u8 runtime_data[0]
Definition: node.h:469
Definition: pg.h:310
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:369
static void pcap_add_buffer(pcap_main_t *pm, vlib_main_t *vm, u32 buffer_index, u32 n_bytes_in_trace)
Add buffer (vlib_buffer_t) to the trace.
Definition: pcap.h:201
#define PREDICT_FALSE(x)
Definition: clib.h:97
u16 n_vectors
Definition: node.h:344
clib_error_t * pcap_write(pcap_main_t *pm)
Write PCAP file.
Definition: pcap.c:89
unsigned int u32
Definition: types.h:88
void vlib_buffer_free(vlib_main_t *vm, u32 *buffers, u32 n_buffers)
Free buffers Frees the entire buffer chain for each buffer.
static void * vlib_frame_args(vlib_frame_t *f)
Get pointer to frame scalar data.
Definition: node_funcs.h:270
pg_main_t pg_main
Definition: init.c:44
u64 uword
Definition: types.h:112
uword pg_output(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: output.c:46
#define ETHERNET_MAX_PACKET_BYTES
Definition: ethernet.h:106
pg_interface_t * interfaces
Definition: pg.h:322