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/*
* Copyright (c) 2015 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* pg_output.c: packet generator output
*
* Copyright (c) 2008 Eliot Dresselhaus
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <vppinfra/string.h>
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/pg/pg.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/gso/gro_func.h>
uword
pg_output (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
{
pg_main_t *pg = &pg_main;
u32 *buffers = vlib_frame_vector_args (frame);
uword n_buffers = frame->n_vectors;
uword n_left = n_buffers;
u32 to[GRO_TO_VECTOR_SIZE (n_buffers)];
uword n_to = 0;
vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
pg_interface_t *pif = pool_elt_at_index (pg->interfaces, rd->dev_instance);
if (PREDICT_FALSE (pif->lockp != 0))
while (clib_atomic_test_and_set (pif->lockp))
;
if (PREDICT_FALSE (pif->coalesce_enabled))
{
n_to = vnet_gro_inline (vm, pif->flow_table, buffers, n_left, to);
buffers = to;
n_left = n_to;
}
while (n_left > 0)
{
n_left--;
u32 bi0 = buffers[0];
vlib_buffer_t *b = vlib_get_buffer (vm, bi0);
buffers++;
if (b->flags & VLIB_BUFFER_IS_TRACED)
{
pg_output_trace_t *t = vlib_add_trace (vm, node, b, sizeof (*t));
t->buffer_index = bi0;
clib_memcpy_fast (&t->buffer, b,
sizeof (b[0]) - sizeof (b->pre_data));
clib_memcpy_fast (t->buffer.pre_data, b->data + b->current_data,
sizeof (t->buffer.pre_data));
}
if (pif->pcap_file_name != 0)
pcap_add_buffer (&pif->pcap_main, vm, bi0, ETHERNET_MAX_PACKET_BYTES);
}
if (pif->pcap_file_name != 0)
{
pcap_packet_type_t pm_pt = pif->pcap_main.packet_type;
pif->pcap_main.packet_type =
pg_intf_mode_to_pcap_packet_type (pif->mode);
pcap_write (&pif->pcap_main);
pif->pcap_main.packet_type = pm_pt;
}
if ((pif->pcap_main.flags & PCAP_MAIN_INIT_DONE)
&& pif->pcap_main.n_packets_captured >=
pif->pcap_main.n_packets_to_capture)
pcap_close (&pif->pcap_main);
if (PREDICT_FALSE (pif->coalesce_enabled))
{
n_buffers = n_to;
vlib_buffer_free (vm, to, n_to);
}
else
vlib_buffer_free (vm, vlib_frame_vector_args (frame), n_buffers);
if (PREDICT_FALSE (pif->lockp != 0))
clib_atomic_release (pif->lockp);
return n_buffers;
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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