1#ifndef __LINUX_IF_PACKET_H
2#define __LINUX_IF_PACKET_H
3
4#include <linux/types.h>
5
6struct sockaddr_pkt
7{
8	unsigned short spkt_family;
9	unsigned char spkt_device[14];
10	__be16 spkt_protocol;
11};
12
13struct sockaddr_ll
14{
15	unsigned short	sll_family;
16	__be16		sll_protocol;
17	int		sll_ifindex;
18	unsigned short	sll_hatype;
19	unsigned char	sll_pkttype;
20	unsigned char	sll_halen;
21	unsigned char	sll_addr[8];
22};
23
24/* Packet types */
25
26#define PACKET_HOST		0		/* To us		*/
27#define PACKET_BROADCAST	1		/* To all		*/
28#define PACKET_MULTICAST	2		/* To group		*/
29#define PACKET_OTHERHOST	3		/* To someone else 	*/
30#define PACKET_OUTGOING		4		/* Outgoing of any type */
31/* These ones are invisible by user level */
32#define PACKET_LOOPBACK		5		/* MC/BRD frame looped back */
33#define PACKET_FASTROUTE	6		/* Fastrouted frame	*/
34
35/* Packet socket options */
36
37#define PACKET_ADD_MEMBERSHIP		1
38#define PACKET_DROP_MEMBERSHIP		2
39#define PACKET_RECV_OUTPUT		3
40/* Value 4 is still used by obsolete turbo-packet. */
41#define PACKET_RX_RING			5
42#define PACKET_STATISTICS		6
43#define PACKET_COPY_THRESH		7
44#define PACKET_AUXDATA			8
45#define PACKET_ORIGDEV			9
46
47struct tpacket_stats
48{
49	unsigned int	tp_packets;
50	unsigned int	tp_drops;
51};
52
53struct tpacket_auxdata
54{
55	__u32		tp_status;
56	__u32		tp_len;
57	__u32		tp_snaplen;
58	__u16		tp_mac;
59	__u16		tp_net;
60};
61
62struct tpacket_hdr
63{
64	unsigned long	tp_status;
65#define TP_STATUS_KERNEL	0
66#define TP_STATUS_USER		1
67#define TP_STATUS_COPY		2
68#define TP_STATUS_LOSING	4
69#define TP_STATUS_CSUMNOTREADY	8
70	unsigned int	tp_len;
71	unsigned int	tp_snaplen;
72	unsigned short	tp_mac;
73	unsigned short	tp_net;
74	unsigned int	tp_sec;
75	unsigned int	tp_usec;
76};
77
78#define TPACKET_ALIGNMENT	16
79#define TPACKET_ALIGN(x)	(((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
80#define TPACKET_HDRLEN		(TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
81
82/*
83   Frame structure:
84
85   - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
86   - struct tpacket_hdr
87   - pad to TPACKET_ALIGNMENT=16
88   - struct sockaddr_ll
89   - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
90   - Start+tp_mac: [ Optional MAC header ]
91   - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
92   - Pad to align to TPACKET_ALIGNMENT=16
93 */
94
95struct tpacket_req
96{
97	unsigned int	tp_block_size;	/* Minimal size of contiguous block */
98	unsigned int	tp_block_nr;	/* Number of blocks */
99	unsigned int	tp_frame_size;	/* Size of frame */
100	unsigned int	tp_frame_nr;	/* Total number of frames */
101};
102
103struct packet_mreq
104{
105	int		mr_ifindex;
106	unsigned short	mr_type;
107	unsigned short	mr_alen;
108	unsigned char	mr_address[8];
109};
110
111#define PACKET_MR_MULTICAST	0
112#define PACKET_MR_PROMISC	1
113#define PACKET_MR_ALLMULTI	2
114
115#endif
116