/* * 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: */