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 unsigned short spkt_family;
8 unsigned char spkt_device[14];
9 __be16 spkt_protocol;
10};
11
12struct sockaddr_ll {
13 unsigned short sll_family;
14 __be16 sll_protocol;
15 int sll_ifindex;
16 unsigned short sll_hatype;
17 unsigned char sll_pkttype;
18 unsigned char sll_halen;
19 unsigned char sll_addr[8];
20};
21
22/* Packet types */
23
24#define PACKET_HOST 0 /* To us */
25#define PACKET_BROADCAST 1 /* To all */
26#define PACKET_MULTICAST 2 /* To group */
27#define PACKET_OTHERHOST 3 /* To someone else */
28#define PACKET_OUTGOING 4 /* Outgoing of any type */
29/* These ones are invisible by user level */
30#define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */
31#define PACKET_FASTROUTE 6 /* Fastrouted frame */
32
33/* Packet socket options */
34
35#define PACKET_ADD_MEMBERSHIP 1
36#define PACKET_DROP_MEMBERSHIP 2
37#define PACKET_RECV_OUTPUT 3
38/* Value 4 is still used by obsolete turbo-packet. */
39#define PACKET_RX_RING 5
40#define PACKET_STATISTICS 6
41#define PACKET_COPY_THRESH 7
42#define PACKET_AUXDATA 8
43#define PACKET_ORIGDEV 9
44#define PACKET_VERSION 10
45#define PACKET_HDRLEN 11
46#define PACKET_RESERVE 12
47#define PACKET_TX_RING 13
48#define PACKET_LOSS 14
49
50struct tpacket_stats {
51 unsigned int tp_packets;
52 unsigned int tp_drops;
53};
54
55struct tpacket_auxdata {
56 __u32 tp_status;
57 __u32 tp_len;
58 __u32 tp_snaplen;
59 __u16 tp_mac;
60 __u16 tp_net;
61 __u16 tp_vlan_tci;
62};
63
64/* Rx ring - header status */
65#define TP_STATUS_KERNEL 0x0
66#define TP_STATUS_USER 0x1
67#define TP_STATUS_COPY 0x2
68#define TP_STATUS_LOSING 0x4
69#define TP_STATUS_CSUMNOTREADY 0x8
70
71/* Tx ring - header status */
72#define TP_STATUS_AVAILABLE 0x0
73#define TP_STATUS_SEND_REQUEST 0x1
74#define TP_STATUS_SENDING 0x2
75#define TP_STATUS_WRONG_FORMAT 0x4
76
77struct tpacket_hdr {
78 unsigned long tp_status;
79 unsigned int tp_len;
80 unsigned int tp_snaplen;
81 unsigned short tp_mac;
82 unsigned short tp_net;
83 unsigned int tp_sec;
84 unsigned int tp_usec;
85};
86
87#define TPACKET_ALIGNMENT 16
88#define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
89#define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
90
91struct tpacket2_hdr {
92 __u32 tp_status;
93 __u32 tp_len;
94 __u32 tp_snaplen;
95 __u16 tp_mac;
96 __u16 tp_net;
97 __u32 tp_sec;
98 __u32 tp_nsec;
99 __u16 tp_vlan_tci;
100};
101
102#define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
103
104enum tpacket_versions {
105 TPACKET_V1,
106 TPACKET_V2,
107};
108
109/*
110 Frame structure:
111
112 - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
113 - struct tpacket_hdr
114 - pad to TPACKET_ALIGNMENT=16
115 - struct sockaddr_ll
116 - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
117 - Start+tp_mac: [ Optional MAC header ]
118 - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
119 - Pad to align to TPACKET_ALIGNMENT=16
120 */
121
122struct tpacket_req {
123 unsigned int tp_block_size; /* Minimal size of contiguous block */
124 unsigned int tp_block_nr; /* Number of blocks */
125 unsigned int tp_frame_size; /* Size of frame */
126 unsigned int tp_frame_nr; /* Total number of frames */
127};
128
129struct packet_mreq {
130 int mr_ifindex;
131 unsigned short mr_type;
132 unsigned short mr_alen;
133 unsigned char mr_address[8];
134};
135
136#define PACKET_MR_MULTICAST 0
137#define PACKET_MR_PROMISC 1
138#define PACKET_MR_ALLMULTI 2
139#define PACKET_MR_UNICAST 3
140
141#endif