Release 4.7 include/uapi/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];
};

/* 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 */

#define PACKET_LOOPBACK		5		
/* MC/BRD frame looped back */

#define PACKET_USER		6		
/* To user space        */

#define PACKET_KERNEL		7		
/* To kernel space      */
/* Unused, PACKET_FASTROUTE and PACKET_LOOPBACK are invisible to user space */

#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

#define PACKET_FANOUT			18

#define PACKET_TX_HAS_OFF		19

#define PACKET_QDISC_BYPASS		20

#define PACKET_ROLLOVER_STATS		21

#define PACKET_FANOUT_DATA		22


#define PACKET_FANOUT_HASH		0

#define PACKET_FANOUT_LB		1

#define PACKET_FANOUT_CPU		2

#define PACKET_FANOUT_ROLLOVER		3

#define PACKET_FANOUT_RND		4

#define PACKET_FANOUT_QM		5

#define PACKET_FANOUT_CBPF		6

#define PACKET_FANOUT_EBPF		7

#define PACKET_FANOUT_FLAG_ROLLOVER	0x1000

#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;
};


struct tpacket_rollover_stats {
	
__aligned_u64	tp_all;
	
__aligned_u64	tp_huge;
	
__aligned_u64	tp_failed;
};


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_vlan_tpid;
};

/* Rx ring - header status */

#define TP_STATUS_KERNEL		      0

#define TP_STATUS_USER			(1 << 0)

#define TP_STATUS_COPY			(1 << 1)

#define TP_STATUS_LOSING		(1 << 2)

#define TP_STATUS_CSUMNOTREADY		(1 << 3)

#define TP_STATUS_VLAN_VALID		(1 << 4) 
/* auxdata has valid tp_vlan_tci */

#define TP_STATUS_BLK_TMO		(1 << 5)

#define TP_STATUS_VLAN_TPID_VALID	(1 << 6) 
/* auxdata has valid tp_vlan_tpid */

#define TP_STATUS_CSUM_VALID		(1 << 7)

/* Tx ring - header status */

#define TP_STATUS_AVAILABLE	      0

#define TP_STATUS_SEND_REQUEST	(1 << 0)

#define TP_STATUS_SENDING	(1 << 1)

#define TP_STATUS_WRONG_FORMAT	(1 << 2)

/* Rx and Tx ring - header status */

#define TP_STATUS_TS_SOFTWARE		(1 << 29)

#define TP_STATUS_TS_SYS_HARDWARE	(1 << 30) 
/* deprecated, never set */

#define TP_STATUS_TS_RAW_HARDWARE	(1 << 31)

/* Rx ring - feature request bits */

#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_vlan_tpid;
	
__u8		tp_padding[4];
};


struct tpacket_hdr_variant1 {
	
__u32	tp_rxhash;
	
__u32	tp_vlan_tci;
	
__u16	tp_vlan_tpid;
	
__u16	tp_padding;
};


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;
	/* pkt_hdr variants */
	union {
		
struct tpacket_hdr_variant1 hv1;
	};
	
__u8		tp_padding[8];
};


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;

	/* Number of valid bytes (including padding)
         * blk_len <= tp_block_size
         */
	
__u32	blk_len;

	/*
         * Quite a few uses of sequence number:
         * 1. Make sure cache flush etc worked.
         *    Well, one can argue - why not use the increasing ts below?
         *    But look at 2. below first.
         * 2. When you pass around blocks to other user space decoders,
         *    you can see which blk[s] is[are] outstanding etc.
         * 3. Validate kernel code.
         */
	
__aligned_u64	seq_num;

	/*
         * ts_last_pkt:
         *
         * Case 1.      Block has 'N'(N >=1) packets and TMO'd(timed out)
         *              ts_last_pkt == 'time-stamp of last packet' and NOT the
         *              time when the timer fired and the block was closed.
         *              By providing the ts of the last packet we can absolutely
         *              guarantee that time-stamp wise, the first packet in the
         *              next block will never precede the last packet of the
         *              previous block.
         * Case 2.      Block has zero packets and TMO'd
         *              ts_last_pkt = time when the timer fired and the block
         *              was closed.
         * Case 3.      Block has 'N' packets and NO TMO.
         *              ts_last_pkt = time-stamp of the last pkt in the block.
         *
         * ts_first_pkt:
         *              Is always the time-stamp when the block was opened.
         *              Case a) ZERO packets
         *                      No packets to deal with but atleast you know the
         *                      time-interval of this block.
         *              Case b) Non-zero packets
         *                      Use the ts of the first packet in the block.
         *
         */
	

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
};

/*
   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 tpacket_req3 {
	
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 */
	
unsigned int	tp_retire_blk_tov; /* timeout in msecs */
	
unsigned int	tp_sizeof_priv; /* offset to private data area */
	
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
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