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/*
* Copyright (c) 2020 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.
*/
#ifndef included_vnet_mpcap_h
#define included_vnet_mpcap_h
#include <vnet/vnet.h>
#include <vppinfra/mpcap.h>
/**
* @brief Add packet
*
* @param *pm - mpcap_main_t
* @param time_now - f64
* @param n_bytes_in_trace - u32
* @param n_bytes_in_packet - u32
*
* @return Packet Data
*
*/
static inline void *
mpcap_add_packet (mpcap_main_t * pm,
f64 time_now, u32 n_bytes_in_trace, u32 n_bytes_in_packet)
{
mpcap_packet_header_t *h;
u8 *d;
/* File already closed? */
if (PREDICT_FALSE (pm->flags & MPCAP_FLAG_INIT_DONE) == 0)
return 0;
d = pm->current_va;
pm->current_va += sizeof (h[0]) + n_bytes_in_trace;
/* Out of space? */
if (PREDICT_FALSE (pm->current_va >= pm->file_baseva + pm->max_file_size))
return 0;
h = (void *) (d);
h->time_in_sec = time_now;
h->time_in_usec = 1e6 * (time_now - h->time_in_sec);
h->n_packet_bytes_stored_in_file = n_bytes_in_trace;
h->n_bytes_in_packet = n_bytes_in_packet;
pm->n_packets_captured++;
return h->data;
}
/**
* @brief Add buffer (vlib_buffer_t) to the trace
*
* @param *pm - mpcap_main_t
* @param *vm - vlib_main_t
* @param time_now - f64
* @param buffer_index - u32
* @param n_bytes_in_trace - u32
*
*/
static inline void
mpcap_add_buffer (mpcap_main_t * pm,
vlib_main_t * vm,
f64 time_now, u32 buffer_index, u32 n_bytes_in_trace)
{
vlib_buffer_t *b = vlib_get_buffer (vm, buffer_index);
u32 n = vlib_buffer_length_in_chain (vm, b);
i32 n_left = clib_min (n_bytes_in_trace, n);
void *d;
clib_spinlock_lock_if_init (&pm->lock);
d = mpcap_add_packet (pm, time_now, n_left, n);
if (PREDICT_FALSE (d == 0))
{
mpcap_close (pm);
clib_spinlock_unlock_if_init (&pm->lock);
return;
}
while (1)
{
u32 copy_length = clib_min ((u32) n_left, b->current_length);
clib_memcpy (d, b->data + b->current_data, copy_length);
n_left -= b->current_length;
if (n_left <= 0)
break;
d += b->current_length;
ASSERT (b->flags & VLIB_BUFFER_NEXT_PRESENT);
b = vlib_get_buffer (vm, b->next_buffer);
}
if (pm->n_packets_captured >= pm->n_packets_to_capture)
mpcap_close (pm);
clib_spinlock_unlock_if_init (&pm->lock);
}
#endif /* included_vnet_mpcap_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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