#ifndef __LINUX_IF_PACKET_H
  #define __LINUX_IF_PACKET_H

  #include <linux/types.h>

  struct sockaddr_pkt {

  	unsigned short spkt_family;
  	unsigned char spkt_device[14];

  	__be16 spkt_protocol;

  };

  struct sockaddr_ll {

  	unsigned short	sll_family;

  	__be16		sll_protocol;

  	int		sll_ifindex;
  	unsigned short	sll_hatype;
  	unsigned char	sll_pkttype;
  	unsigned char	sll_halen;
  	unsigned char	sll_addr[8];
  };
  
  /* Packet types */
  
  #define PACKET_HOST		0		/* To us		*/
  #define PACKET_BROADCAST	1		/* To all		*/
  #define PACKET_MULTICAST	2		/* To group		*/
  #define PACKET_OTHERHOST	3		/* To someone else 	*/
  #define PACKET_OUTGOING		4		/* Outgoing of any type */
  /* These ones are invisible by user level */
  #define PACKET_LOOPBACK		5		/* MC/BRD frame looped back */
  #define PACKET_FASTROUTE	6		/* Fastrouted frame	*/
  
  /* Packet socket options */
  
  #define PACKET_ADD_MEMBERSHIP		1
  #define PACKET_DROP_MEMBERSHIP		2
  #define PACKET_RECV_OUTPUT		3
  /* Value 4 is still used by obsolete turbo-packet. */
  #define PACKET_RX_RING			5
  #define PACKET_STATISTICS		6
  #define PACKET_COPY_THRESH		7

  #define PACKET_AUXDATA			8

  #define PACKET_ORIGDEV			9

  #define PACKET_VERSION			10
  #define PACKET_HDRLEN			11

  #define PACKET_RESERVE			12

  #define PACKET_TX_RING			13
  #define PACKET_LOSS			14

  #define PACKET_VNET_HDR			15

  #define PACKET_TX_TIMESTAMP		16

  #define PACKET_TIMESTAMP		17

  struct tpacket_stats {

  	unsigned int	tp_packets;
  	unsigned int	tp_drops;
  };

  struct tpacket_auxdata {

  	__u32		tp_status;
  	__u32		tp_len;
  	__u32		tp_snaplen;
  	__u16		tp_mac;
  	__u16		tp_net;

  	__u16		tp_vlan_tci;

  };

  /* Rx ring - header status */
  #define TP_STATUS_KERNEL	0x0
  #define TP_STATUS_USER		0x1
  #define TP_STATUS_COPY		0x2
  #define TP_STATUS_LOSING	0x4
  #define TP_STATUS_CSUMNOTREADY	0x8
  
  /* Tx ring - header status */
  #define TP_STATUS_AVAILABLE	0x0
  #define TP_STATUS_SEND_REQUEST	0x1
  #define TP_STATUS_SENDING	0x2
  #define TP_STATUS_WRONG_FORMAT	0x4

  struct tpacket_hdr {

  	unsigned long	tp_status;

  	unsigned int	tp_len;
  	unsigned int	tp_snaplen;
  	unsigned short	tp_mac;
  	unsigned short	tp_net;
  	unsigned int	tp_sec;
  	unsigned int	tp_usec;
  };
  
  #define TPACKET_ALIGNMENT	16
  #define TPACKET_ALIGN(x)	(((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
  #define TPACKET_HDRLEN		(TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))

  struct tpacket2_hdr {

  	__u32		tp_status;
  	__u32		tp_len;
  	__u32		tp_snaplen;
  	__u16		tp_mac;
  	__u16		tp_net;
  	__u32		tp_sec;
  	__u32		tp_nsec;

  	__u16		tp_vlan_tci;

  };
  
  #define TPACKET2_HDRLEN		(TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))

  enum tpacket_versions {

  	TPACKET_V1,
  	TPACKET_V2,
  };

  /*
     Frame structure:
  
     - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
     - struct tpacket_hdr
     - pad to TPACKET_ALIGNMENT=16
     - struct sockaddr_ll
     - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
     - Start+tp_mac: [ Optional MAC header ]
     - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
     - Pad to align to TPACKET_ALIGNMENT=16
   */

  struct tpacket_req {

  	unsigned int	tp_block_size;	/* Minimal size of contiguous block */
  	unsigned int	tp_block_nr;	/* Number of blocks */
  	unsigned int	tp_frame_size;	/* Size of frame */
  	unsigned int	tp_frame_nr;	/* Total number of frames */
  };

  struct packet_mreq {

  	int		mr_ifindex;
  	unsigned short	mr_type;
  	unsigned short	mr_alen;
  	unsigned char	mr_address[8];
  };
  
  #define PACKET_MR_MULTICAST	0
  #define PACKET_MR_PROMISC	1
  #define PACKET_MR_ALLMULTI	2

  #define PACKET_MR_UNICAST	3

  
  #endif