[thirdparty/lldpd.git] / include / linux / if_packet.h

/* 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
Commit	Line	Data
a192a2e9	1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2516cfb1 VB	2	#ifndef __LINUX_IF_PACKET_H
	3	#define __LINUX_IF_PACKET_H
	4
	5	#include <linux/types.h>
	6
	7	struct sockaddr_pkt {
	8	unsigned short spkt_family;
	9	unsigned char spkt_device[14];
	10	__be16 spkt_protocol;
	11	};
	12
	13	struct sockaddr_ll {
	14	unsigned short sll_family;
	15	__be16 sll_protocol;
	16	int sll_ifindex;
	17	unsigned short sll_hatype;
	18	unsigned char sll_pkttype;
	19	unsigned char sll_halen;
	20	unsigned char sll_addr[8];
	21	};
	22
	23	/* Packet types */
	24
	25	#define PACKET_HOST 0 /* To us */
	26	#define PACKET_BROADCAST 1 /* To all */
	27	#define PACKET_MULTICAST 2 /* To group */
	28	#define PACKET_OTHERHOST 3 /* To someone else */
	29	#define PACKET_OUTGOING 4 /* Outgoing of any type */
2516cfb1	30	#define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */
a192a2e9 VB	31	#define PACKET_USER 6 /* To user space */
	32	#define PACKET_KERNEL 7 /* To kernel space */
	33	/* Unused, PACKET_FASTROUTE and PACKET_LOOPBACK are invisible to user space */
2516cfb1 VB	34	#define PACKET_FASTROUTE 6 /* Fastrouted frame */
	35
	36	/* Packet socket options */
	37
	38	#define PACKET_ADD_MEMBERSHIP 1
	39	#define PACKET_DROP_MEMBERSHIP 2
	40	#define PACKET_RECV_OUTPUT 3
	41	/* Value 4 is still used by obsolete turbo-packet. */
	42	#define PACKET_RX_RING 5
	43	#define PACKET_STATISTICS 6
	44	#define PACKET_COPY_THRESH 7
	45	#define PACKET_AUXDATA 8
	46	#define PACKET_ORIGDEV 9
	47	#define PACKET_VERSION 10
	48	#define PACKET_HDRLEN 11
	49	#define PACKET_RESERVE 12
	50	#define PACKET_TX_RING 13
	51	#define PACKET_LOSS 14
	52	#define PACKET_VNET_HDR 15
	53	#define PACKET_TX_TIMESTAMP 16
	54	#define PACKET_TIMESTAMP 17
	55	#define PACKET_FANOUT 18
a192a2e9 VB	56	#define PACKET_TX_HAS_OFF 19
	57	#define PACKET_QDISC_BYPASS 20
	58	#define PACKET_ROLLOVER_STATS 21
	59	#define PACKET_FANOUT_DATA 22
2516cfb1 VB	60
	61	#define PACKET_FANOUT_HASH 0
	62	#define PACKET_FANOUT_LB 1
	63	#define PACKET_FANOUT_CPU 2
a192a2e9 VB	64	#define PACKET_FANOUT_ROLLOVER 3
	65	#define PACKET_FANOUT_RND 4
	66	#define PACKET_FANOUT_QM 5
	67	#define PACKET_FANOUT_CBPF 6
	68	#define PACKET_FANOUT_EBPF 7
	69	#define PACKET_FANOUT_FLAG_ROLLOVER 0x1000
	70	#define PACKET_FANOUT_FLAG_UNIQUEID 0x2000
2516cfb1 VB	71	#define PACKET_FANOUT_FLAG_DEFRAG 0x8000
	72
	73	struct tpacket_stats {
	74	unsigned int tp_packets;
	75	unsigned int tp_drops;
	76	};
	77
	78	struct tpacket_stats_v3 {
	79	unsigned int tp_packets;
	80	unsigned int tp_drops;
	81	unsigned int tp_freeze_q_cnt;
	82	};
	83
a192a2e9 VB	84	struct tpacket_rollover_stats {
	85	__aligned_u64 tp_all;
	86	__aligned_u64 tp_huge;
	87	__aligned_u64 tp_failed;
	88	};
	89
2516cfb1 VB	90	union tpacket_stats_u {
	91	struct tpacket_stats stats1;
	92	struct tpacket_stats_v3 stats3;
	93	};
	94
	95	struct tpacket_auxdata {
	96	__u32 tp_status;
	97	__u32 tp_len;
	98	__u32 tp_snaplen;
	99	__u16 tp_mac;
	100	__u16 tp_net;
	101	__u16 tp_vlan_tci;
a192a2e9	102	__u16 tp_vlan_tpid;
2516cfb1 VB	103	};
	104
	105	/* Rx ring - header status */
a192a2e9 VB	106	#define TP_STATUS_KERNEL 0
	107	#define TP_STATUS_USER (1 << 0)
	108	#define TP_STATUS_COPY (1 << 1)
	109	#define TP_STATUS_LOSING (1 << 2)
	110	#define TP_STATUS_CSUMNOTREADY (1 << 3)
	111	#define TP_STATUS_VLAN_VALID (1 << 4) /* auxdata has valid tp_vlan_tci */
	112	#define TP_STATUS_BLK_TMO (1 << 5)
	113	#define TP_STATUS_VLAN_TPID_VALID (1 << 6) /* auxdata has valid tp_vlan_tpid */
	114	#define TP_STATUS_CSUM_VALID (1 << 7)
2516cfb1 VB	115
2516cfb1 VB	116	/* Tx ring - header status */
a192a2e9 VB	117	#define TP_STATUS_AVAILABLE 0
	118	#define TP_STATUS_SEND_REQUEST (1 << 0)
	119	#define TP_STATUS_SENDING (1 << 1)
	120	#define TP_STATUS_WRONG_FORMAT (1 << 2)
	121
	122	/* Rx and Tx ring - header status */
	123	#define TP_STATUS_TS_SOFTWARE (1 << 29)
	124	#define TP_STATUS_TS_SYS_HARDWARE (1 << 30) /* deprecated, never set */
	125	#define TP_STATUS_TS_RAW_HARDWARE (1 << 31)
2516cfb1 VB	126
	127	/* Rx ring - feature request bits */
	128	#define TP_FT_REQ_FILL_RXHASH 0x1
	129
	130	struct tpacket_hdr {
	131	unsigned long tp_status;
	132	unsigned int tp_len;
	133	unsigned int tp_snaplen;
	134	unsigned short tp_mac;
	135	unsigned short tp_net;
	136	unsigned int tp_sec;
	137	unsigned int tp_usec;
	138	};
	139
	140	#define TPACKET_ALIGNMENT 16
	141	#define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
	142	#define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
	143
	144	struct tpacket2_hdr {
	145	__u32 tp_status;
	146	__u32 tp_len;
	147	__u32 tp_snaplen;
	148	__u16 tp_mac;
	149	__u16 tp_net;
	150	__u32 tp_sec;
	151	__u32 tp_nsec;
	152	__u16 tp_vlan_tci;
a192a2e9 VB	153	__u16 tp_vlan_tpid;
a192a2e9 VB	154	__u8 tp_padding[4];
2516cfb1 VB	155	};
	156
	157	struct tpacket_hdr_variant1 {
	158	__u32 tp_rxhash;
	159	__u32 tp_vlan_tci;
a192a2e9 VB	160	__u16 tp_vlan_tpid;
a192a2e9 VB	161	__u16 tp_padding;
2516cfb1 VB	162	};
	163
	164	struct tpacket3_hdr {
	165	__u32 tp_next_offset;
	166	__u32 tp_sec;
	167	__u32 tp_nsec;
	168	__u32 tp_snaplen;
	169	__u32 tp_len;
	170	__u32 tp_status;
	171	__u16 tp_mac;
	172	__u16 tp_net;
	173	/* pkt_hdr variants */
	174	union {
	175	struct tpacket_hdr_variant1 hv1;
	176	};
a192a2e9	177	__u8 tp_padding[8];
2516cfb1 VB	178	};
	179
	180	struct tpacket_bd_ts {
	181	unsigned int ts_sec;
	182	union {
	183	unsigned int ts_usec;
	184	unsigned int ts_nsec;
	185	};
	186	};
	187
	188	struct tpacket_hdr_v1 {
	189	__u32 block_status;
	190	__u32 num_pkts;
	191	__u32 offset_to_first_pkt;
	192
	193	/* Number of valid bytes (including padding)
	194	* blk_len <= tp_block_size
	195	*/
	196	__u32 blk_len;
	197
	198	/*
	199	* Quite a few uses of sequence number:
	200	* 1. Make sure cache flush etc worked.
	201	* Well, one can argue - why not use the increasing ts below?
	202	* But look at 2. below first.
	203	* 2. When you pass around blocks to other user space decoders,
	204	* you can see which blk[s] is[are] outstanding etc.
	205	* 3. Validate kernel code.
	206	*/
	207	__aligned_u64 seq_num;
	208
	209	/*
	210	* ts_last_pkt:
	211	*
	212	* Case 1. Block has 'N'(N >=1) packets and TMO'd(timed out)
	213	* ts_last_pkt == 'time-stamp of last packet' and NOT the
	214	* time when the timer fired and the block was closed.
	215	* By providing the ts of the last packet we can absolutely
	216	* guarantee that time-stamp wise, the first packet in the
	217	* next block will never precede the last packet of the
	218	* previous block.
	219	* Case 2. Block has zero packets and TMO'd
	220	* ts_last_pkt = time when the timer fired and the block
	221	* was closed.
	222	* Case 3. Block has 'N' packets and NO TMO.
	223	* ts_last_pkt = time-stamp of the last pkt in the block.
	224	*
	225	* ts_first_pkt:
	226	* Is always the time-stamp when the block was opened.
	227	* Case a) ZERO packets
	228	* No packets to deal with but atleast you know the
	229	* time-interval of this block.
	230	* Case b) Non-zero packets
	231	* Use the ts of the first packet in the block.
	232	*
	233	*/
	234	struct tpacket_bd_ts ts_first_pkt, ts_last_pkt;
	235	};
	236
	237	union tpacket_bd_header_u {
	238	struct tpacket_hdr_v1 bh1;
	239	};
	240
	241	struct tpacket_block_desc {
242	__u32 version;
243	__u32 offset_to_priv;
244	union tpacket_bd_header_u hdr;
245	};
246
247	#define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
248	#define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll))
249
250	enum tpacket_versions {
251	TPACKET_V1,
252	TPACKET_V2,
253	TPACKET_V3
254	};
255
256	/*
257	Frame structure:
258
259	- Start. Frame must be aligned to TPACKET_ALIGNMENT=16
260	- struct tpacket_hdr
261	- pad to TPACKET_ALIGNMENT=16
262	- struct sockaddr_ll
263	- Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
264	- Start+tp_mac: [ Optional MAC header ]
265	- Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
266	- Pad to align to TPACKET_ALIGNMENT=16
267	*/
268
269	struct tpacket_req {
270	unsigned int tp_block_size; /* Minimal size of contiguous block */
271	unsigned int tp_block_nr; /* Number of blocks */
272	unsigned int tp_frame_size; /* Size of frame */
273	unsigned int tp_frame_nr; /* Total number of frames */
274	};
275
276	struct tpacket_req3 {
277	unsigned int tp_block_size; /* Minimal size of contiguous block */
278	unsigned int tp_block_nr; /* Number of blocks */
279	unsigned int tp_frame_size; /* Size of frame */
280	unsigned int tp_frame_nr; /* Total number of frames */
281	unsigned int tp_retire_blk_tov; /* timeout in msecs */
282	unsigned int tp_sizeof_priv; /* offset to private data area */
283	unsigned int tp_feature_req_word;
284	};
285
286	union tpacket_req_u {
287	struct tpacket_req req;
288	struct tpacket_req3 req3;
289	};
290
291	struct packet_mreq {
292	int mr_ifindex;
293	unsigned short mr_type;
294	unsigned short mr_alen;
295	unsigned char mr_address[8];
296	};
297
298	#define PACKET_MR_MULTICAST 0
299	#define PACKET_MR_PROMISC 1
300	#define PACKET_MR_ALLMULTI 2
301	#define PACKET_MR_UNICAST 3
302
303	#endif