include/linux/if_packet.h - kernel/mindspeed - Git at Google

 #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	*/
 #define PACKET_MASK_ANY		0xffffffff	/* mask for packet type bits */


 /* 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_RECV_TYPE		19

 #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;
 };

 /* 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
 #define TP_STATUS_VLAN_VALID   0x10 /* auxdata has valid tp_vlan_tci */
 #define TP_STATUS_BLK_TMO	0x20

 /* 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

 /* 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_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;
 	/* pkt_hdr variants */
 	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;

 	/* 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
	#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 */
	#define PACKET_MASK_ANY 0xffffffff /* mask for packet type bits */


	/* 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_RECV_TYPE 19

	#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;
	};

	/* 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
	#define TP_STATUS_VLAN_VALID 0x10 /* auxdata has valid tp_vlan_tci */
	#define TP_STATUS_BLK_TMO 0x20

	/* 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

	/* 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_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;
	/* pkt_hdr variants */
	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;

	/* 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