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 <vppinfra/string.h>
41#include <vlib/vlib.h>
42#include <vnet/vnet.h>
43#include <vnet/pg/pg.h>
44#include <vnet/ethernet/ethernet.h>
45
46uword
47pg_output (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
48{
49  pg_main_t *pg = &pg_main;
50  u32 *buffers = vlib_frame_vector_args (frame);
51  uword n_buffers = frame->n_vectors;
52  uword n_left = n_buffers;
53  vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
54  pg_interface_t *pif = pool_elt_at_index (pg->interfaces, rd->dev_instance);
55
56  if (PREDICT_FALSE (pif->lockp != 0))
57    while (clib_atomic_test_and_set (pif->lockp))
58      ;
59
60  while (n_left > 0)
61    {
62      n_left--;
63      u32 bi0 = buffers[0];
64      vlib_buffer_t *b = vlib_get_buffer (vm, bi0);
65      buffers++;
66
67      if (b->flags & VLIB_BUFFER_IS_TRACED)
68	{
69	  pg_output_trace_t *t = vlib_add_trace (vm, node, b, sizeof (*t));
70	  t->buffer_index = bi0;
71	  clib_memcpy_fast (&t->buffer, b,
72			    sizeof (b[0]) - sizeof (b->pre_data));
73	  clib_memcpy_fast (t->buffer.pre_data, b->data + b->current_data,
74			    sizeof (t->buffer.pre_data));
75	}
76
77      if (pif->pcap_file_name != 0)
78	pcap_add_buffer (&pif->pcap_main, vm, bi0, ETHERNET_MAX_PACKET_BYTES);
79    }
80  if (pif->pcap_file_name != 0)
81    pcap_write (&pif->pcap_main);
82  if ((pif->pcap_main.flags & PCAP_MAIN_INIT_DONE)
83      && pif->pcap_main.n_packets_captured >=
84      pif->pcap_main.n_packets_to_capture)
85    pcap_close (&pif->pcap_main);
86
87  vlib_buffer_free (vm, vlib_frame_vector_args (frame), n_buffers);
88  if (PREDICT_FALSE (pif->lockp != 0))
89    clib_atomic_release (pif->lockp);
90
91  return n_buffers;
92}
93
94/*
95 * fd.io coding-style-patch-verification: ON
96 *
97 * Local Variables:
98 * eval: (c-set-style "gnu")
99 * End:
100 */
101