include/linux/if_packet.h

#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];
};


#define PACKET_HOST		0		
#define PACKET_BROADCAST	1		
#define PACKET_MULTICAST	2		
#define PACKET_OTHERHOST	3		
#define PACKET_OUTGOING		4		
#define PACKET_LOOPBACK		5		
#define PACKET_FASTROUTE	6		


#define PACKET_ADD_MEMBERSHIP		1
#define PACKET_DROP_MEMBERSHIP		2
#define PACKET_RECV_OUTPUT		3
#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
#define PACKET_FANOUT			18

#define PACKET_FANOUT_HASH		0
#define PACKET_FANOUT_LB		1
#define PACKET_FANOUT_CPU		2
#define PACKET_FANOUT_FLAG_DEFRAG	0x8000

struct tpacket_stats {
	unsigned int	tp_packets;
	unsigned int	tp_drops;
};

struct tpacket_stats_v3 {
	unsigned int	tp_packets;
	unsigned int	tp_drops;
	unsigned int	tp_freeze_q_cnt;
};

union tpacket_stats_u {
	struct tpacket_stats stats1;
	struct tpacket_stats_v3 stats3;
};

struct tpacket_auxdata {
	__u32		tp_status;
	__u32		tp_len;
	__u32		tp_snaplen;
	__u16		tp_mac;
	__u16		tp_net;
	__u16		tp_vlan_tci;
	__u16		tp_padding;
};

#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
#define TP_STATUS_VLAN_VALID   0x10 
#define TP_STATUS_BLK_TMO	0x20

#define TP_STATUS_AVAILABLE	0x0
#define TP_STATUS_SEND_REQUEST	0x1
#define TP_STATUS_SENDING	0x2
#define TP_STATUS_WRONG_FORMAT	0x4

#define TP_FT_REQ_FILL_RXHASH	0x1

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;
	__u16		tp_padding;
};

struct tpacket_hdr_variant1 {
	__u32	tp_rxhash;
	__u32	tp_vlan_tci;
};

struct tpacket3_hdr {
	__u32		tp_next_offset;
	__u32		tp_sec;
	__u32		tp_nsec;
	__u32		tp_snaplen;
	__u32		tp_len;
	__u32		tp_status;
	__u16		tp_mac;
	__u16		tp_net;
	
	union {
		struct tpacket_hdr_variant1 hv1;
	};
};

struct tpacket_bd_ts {
	unsigned int ts_sec;
	union {
		unsigned int ts_usec;
		unsigned int ts_nsec;
	};
};

struct tpacket_hdr_v1 {
	__u32	block_status;
	__u32	num_pkts;
	__u32	offset_to_first_pkt;

	__u32	blk_len;

	__aligned_u64	seq_num;

	struct tpacket_bd_ts	ts_first_pkt, ts_last_pkt;
};

union tpacket_bd_header_u {
	struct tpacket_hdr_v1 bh1;
};

struct tpacket_block_desc {
	__u32 version;
	__u32 offset_to_priv;
	union tpacket_bd_header_u hdr;
};

#define TPACKET2_HDRLEN		(TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
#define TPACKET3_HDRLEN		(TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll))

enum tpacket_versions {
	TPACKET_V1,
	TPACKET_V2,
	TPACKET_V3
};


struct tpacket_req {
	unsigned int	tp_block_size;	
	unsigned int	tp_block_nr;	
	unsigned int	tp_frame_size;	
	unsigned int	tp_frame_nr;	
};

struct tpacket_req3 {
	unsigned int	tp_block_size;	
	unsigned int	tp_block_nr;	
	unsigned int	tp_frame_size;	
	unsigned int	tp_frame_nr;	
	unsigned int	tp_retire_blk_tov; 
	unsigned int	tp_sizeof_priv; 
	unsigned int	tp_feature_req_word;
};

union tpacket_req_u {
	struct tpacket_req	req;
	struct tpacket_req3	req3;
};

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