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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef __LINUX_IF_PACKET_H
3#define __LINUX_IF_PACKET_H
4
5#include <linux/types.h>
6
7struct sockaddr_pkt {
8 unsigned short spkt_family;
9 unsigned char spkt_device[14];
10 __be16 spkt_protocol;
11};
12
13struct 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 */
30#define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */
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 */
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
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
60
61#define PACKET_FANOUT_HASH 0
62#define PACKET_FANOUT_LB 1
63#define PACKET_FANOUT_CPU 2
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
71#define PACKET_FANOUT_FLAG_DEFRAG 0x8000
72
73struct tpacket_stats {
74 unsigned int tp_packets;
75 unsigned int tp_drops;
76};
77
78struct tpacket_stats_v3 {
79 unsigned int tp_packets;
80 unsigned int tp_drops;
81 unsigned int tp_freeze_q_cnt;
82};
83
84struct tpacket_rollover_stats {
85 __aligned_u64 tp_all;
86 __aligned_u64 tp_huge;
87 __aligned_u64 tp_failed;
88};
89
90union tpacket_stats_u {
91 struct tpacket_stats stats1;
92 struct tpacket_stats_v3 stats3;
93};
94
95struct 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;
102 __u16 tp_vlan_tpid;
103};
104
105/* Rx ring - header status */
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)
115
116/* Tx ring - header status */
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)
126
127/* Rx ring - feature request bits */
128#define TP_FT_REQ_FILL_RXHASH 0x1
129
130struct 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
144struct 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;
153 __u16 tp_vlan_tpid;
154 __u8 tp_padding[4];
155};
156
157struct tpacket_hdr_variant1 {
158 __u32 tp_rxhash;
159 __u32 tp_vlan_tci;
160 __u16 tp_vlan_tpid;
161 __u16 tp_padding;
162};
163
164struct 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 };
177 __u8 tp_padding[8];
178};
179
180struct tpacket_bd_ts {
181 unsigned int ts_sec;
182 union {
183 unsigned int ts_usec;
184 unsigned int ts_nsec;
185 };
186};
187
188struct 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
237union tpacket_bd_header_u {
238 struct tpacket_hdr_v1 bh1;
239};
240
241struct 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
250enum 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
269struct 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
276struct 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
286union tpacket_req_u {
287 struct tpacket_req req;
288 struct tpacket_req3 req3;
289};
290
291struct 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
304

Warning: That file was not part of the compilation database. It may have many parsing errors.