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Edit File : if_packet.h \| Size : 7.73 KB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note / #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_UNIQUEID 0x2000 #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 Back

Edit File : if_packet.h | Size : 7.73 KB

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#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_UNIQUEID	0x2000
#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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