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#define PACKET_VNET_HDR 15
50#define PACKET_TX_TIMESTAMP 16
51#define PACKET_TIMESTAMP 17
52#define PACKET_FANOUT 18
53
54#define PACKET_FANOUT_HASH 0
55#define PACKET_FANOUT_LB 1
56#define PACKET_FANOUT_CPU 2
57#define PACKET_FANOUT_FLAG_DEFRAG 0x8000
58
59struct tpacket_stats {
60 unsigned int tp_packets;
61 unsigned int tp_drops;
62};
63
64struct tpacket_auxdata {
65 __u32 tp_status;
66 __u32 tp_len;
67 __u32 tp_snaplen;
68 __u16 tp_mac;
69 __u16 tp_net;
70 __u16 tp_vlan_tci;
71 __u16 tp_padding;
72};
73
74/* Rx ring - header status */
75#define TP_STATUS_KERNEL 0x0
76#define TP_STATUS_USER 0x1
77#define TP_STATUS_COPY 0x2
78#define TP_STATUS_LOSING 0x4
79#define TP_STATUS_CSUMNOTREADY 0x8
80#define TP_STATUS_VLAN_VALID 0x10 /* auxdata has valid tp_vlan_tci */
81
82/* Tx ring - header status */
83#define TP_STATUS_AVAILABLE 0x0
84#define TP_STATUS_SEND_REQUEST 0x1
85#define TP_STATUS_SENDING 0x2
86#define TP_STATUS_WRONG_FORMAT 0x4
87
88struct tpacket_hdr {
89 unsigned long tp_status;
90 unsigned int tp_len;
91 unsigned int tp_snaplen;
92 unsigned short tp_mac;
93 unsigned short tp_net;
94 unsigned int tp_sec;
95 unsigned int tp_usec;
96};
97
98#define TPACKET_ALIGNMENT 16
99#define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
100#define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
101
102struct tpacket2_hdr {
103 __u32 tp_status;
104 __u32 tp_len;
105 __u32 tp_snaplen;
106 __u16 tp_mac;
107 __u16 tp_net;
108 __u32 tp_sec;
109 __u32 tp_nsec;
110 __u16 tp_vlan_tci;
111 __u16 tp_padding;
112};
113
114#define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
115
116enum tpacket_versions {
117 TPACKET_V1,
118 TPACKET_V2,
119};
120
121/*
122 Frame structure:
123
124 - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
125 - struct tpacket_hdr
126 - pad to TPACKET_ALIGNMENT=16
127 - struct sockaddr_ll
128 - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
129 - Start+tp_mac: [ Optional MAC header ]
130 - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
131 - Pad to align to TPACKET_ALIGNMENT=16
132 */
133
134struct tpacket_req {
135 unsigned int tp_block_size; /* Minimal size of contiguous block */
136 unsigned int tp_block_nr; /* Number of blocks */
137 unsigned int tp_frame_size; /* Size of frame */
138 unsigned int tp_frame_nr; /* Total number of frames */
139};
140
141struct packet_mreq {
142 int mr_ifindex;
143 unsigned short mr_type;
144 unsigned short mr_alen;
145 unsigned char mr_address[8];
146};
147
148#define PACKET_MR_MULTICAST 0
149#define PACKET_MR_PROMISC 1
150#define PACKET_MR_ALLMULTI 2
151#define PACKET_MR_UNICAST 3
152
153#endif