Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
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
45struct tpacket_stats
46{
47 unsigned int tp_packets;
48 unsigned int tp_drops;
49};
50
51struct tpacket_hdr
52{
53 unsigned long tp_status;
54#define TP_STATUS_KERNEL 0
55#define TP_STATUS_USER 1
56#define TP_STATUS_COPY 2
57#define TP_STATUS_LOSING 4
58#define TP_STATUS_CSUMNOTREADY 8
59 unsigned int tp_len;
60 unsigned int tp_snaplen;
61 unsigned short tp_mac;
62 unsigned short tp_net;
63 unsigned int tp_sec;
64 unsigned int tp_usec;
65};
66
67#define TPACKET_ALIGNMENT 16
68#define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
69#define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
70
71/*
72 Frame structure:
73
74 - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
75 - struct tpacket_hdr
76 - pad to TPACKET_ALIGNMENT=16
77 - struct sockaddr_ll
78 - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
79 - Start+tp_mac: [ Optional MAC header ]
80 - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
81 - Pad to align to TPACKET_ALIGNMENT=16
82 */
83
84struct tpacket_req
85{
86 unsigned int tp_block_size; /* Minimal size of contiguous block */
87 unsigned int tp_block_nr; /* Number of blocks */
88 unsigned int tp_frame_size; /* Size of frame */
89 unsigned int tp_frame_nr; /* Total number of frames */
90};
91
92struct packet_mreq
93{
94 int mr_ifindex;
95 unsigned short mr_type;
96 unsigned short mr_alen;
97 unsigned char mr_address[8];
98};
99
100#define PACKET_MR_MULTICAST 0
101#define PACKET_MR_PROMISC 1
102#define PACKET_MR_ALLMULTI 2
103
104#endif