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/*
* pcap_classify.h - Use the classifier to decide if a packet is captured
*
* Copyright (c) 2021 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.
*/
#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/classify/vnet_classify.h>
#include <vnet/classify/trace_classify.h>
/** @file pcap_classify.h
* Use the vpp classifier to decide whether to capture packets
*/
/** @brief vnet_is_packet_pcaped
* @param vlib_buffer_t *b - packet to capture
* @return 0 => no capture, 1 => capture
*/
static_always_inline int
vnet_is_packet_pcaped (vnet_pcap_t *pp, vlib_buffer_t *b, u32 sw_if_index)
{
const u32 pcap_sw_if_index = pp->pcap_sw_if_index;
const u32 filter_classify_table_index = pp->filter_classify_table_index;
const vlib_error_t pcap_error_index = pp->pcap_error_index;
if (pcap_sw_if_index != 0)
{
if (~0 == sw_if_index)
sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
if (pcap_sw_if_index != sw_if_index)
return 0; /* wrong interface, skip */
}
if (pcap_error_index != (vlib_error_t) ~0 && pcap_error_index != b->error)
return 0; /* wrong error */
if (filter_classify_table_index != ~0 &&
vnet_is_packet_traced_inline (b, filter_classify_table_index,
0 /* full classify */) != 1)
return 0; /* not matching the filter, skip */
return 1; /* success */
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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