af_packet.h

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/*
 *------------------------------------------------------------------
 * af_packet.h - linux kernel packet interface header file
 *
 * Copyright (c) 2016 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.
 *------------------------------------------------------------------
 */

typedef struct {
  CLIB_CACHE_LINE_ALIGN_MARK(cacheline0);
  u8 * host_if_name;
  int fd;
  struct tpacket_req * rx_req;
  struct tpacket_req * tx_req;
  u8 * rx_ring;
  u8 * tx_ring;
  u32 hw_if_index;
  u32 sw_if_index;
  u32 unix_file_index;

  u32 next_rx_frame;
  u32 next_tx_frame;

  u32 per_interface_next_index;
  u8 is_admin_up;
} af_packet_if_t;

typedef struct {
  CLIB_CACHE_LINE_ALIGN_MARK(cacheline0);
  af_packet_if_t * interfaces;

  /* bitmap of pending rx interfaces */
  uword * pending_input_bitmap;

  /* rx buffer cache */
  u32 * rx_buffers;

  /* hash of host interface names */
  mhash_t if_index_by_host_if_name;
} af_packet_main_t;

af_packet_main_t af_packet_main;
extern vnet_device_class_t af_packet_device_class;
extern vlib_node_registration_t af_packet_input_node;

int af_packet_create_if(vlib_main_t * vm, u8 * host_if_name, u8 * hw_addr_set);
int af_packet_delete_if(vlib_main_t * vm, u8 * host_if_name);