Linux kernel mirror (for testing)
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linux
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 <asm/byteorder.h>
6#include <linux/types.h>
7
8struct sockaddr_pkt {
9 unsigned short spkt_family;
10 unsigned char spkt_device[14];
11 __be16 spkt_protocol;
12};
13
14struct sockaddr_ll {
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#define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */
32#define PACKET_USER 6 /* To user space */
33#define PACKET_KERNEL 7 /* To kernel space */
34/* Unused, PACKET_FASTROUTE and PACKET_LOOPBACK are invisible to user space */
35#define PACKET_FASTROUTE 6 /* Fastrouted frame */
36
37/* Packet socket options */
38
39#define PACKET_ADD_MEMBERSHIP 1
40#define PACKET_DROP_MEMBERSHIP 2
41#define PACKET_RECV_OUTPUT 3
42/* Value 4 is still used by obsolete turbo-packet. */
43#define PACKET_RX_RING 5
44#define PACKET_STATISTICS 6
45#define PACKET_COPY_THRESH 7
46#define PACKET_AUXDATA 8
47#define PACKET_ORIGDEV 9
48#define PACKET_VERSION 10
49#define PACKET_HDRLEN 11
50#define PACKET_RESERVE 12
51#define PACKET_TX_RING 13
52#define PACKET_LOSS 14
53#define PACKET_VNET_HDR 15
54#define PACKET_TX_TIMESTAMP 16
55#define PACKET_TIMESTAMP 17
56#define PACKET_FANOUT 18
57#define PACKET_TX_HAS_OFF 19
58#define PACKET_QDISC_BYPASS 20
59#define PACKET_ROLLOVER_STATS 21
60#define PACKET_FANOUT_DATA 22
61#define PACKET_IGNORE_OUTGOING 23
62
63#define PACKET_FANOUT_HASH 0
64#define PACKET_FANOUT_LB 1
65#define PACKET_FANOUT_CPU 2
66#define PACKET_FANOUT_ROLLOVER 3
67#define PACKET_FANOUT_RND 4
68#define PACKET_FANOUT_QM 5
69#define PACKET_FANOUT_CBPF 6
70#define PACKET_FANOUT_EBPF 7
71#define PACKET_FANOUT_FLAG_ROLLOVER 0x1000
72#define PACKET_FANOUT_FLAG_UNIQUEID 0x2000
73#define PACKET_FANOUT_FLAG_IGNORE_OUTGOING 0x4000
74#define PACKET_FANOUT_FLAG_DEFRAG 0x8000
75
76struct tpacket_stats {
77 unsigned int tp_packets;
78 unsigned int tp_drops;
79};
80
81struct tpacket_stats_v3 {
82 unsigned int tp_packets;
83 unsigned int tp_drops;
84 unsigned int tp_freeze_q_cnt;
85};
86
87struct tpacket_rollover_stats {
88 __aligned_u64 tp_all;
89 __aligned_u64 tp_huge;
90 __aligned_u64 tp_failed;
91};
92
93union tpacket_stats_u {
94 struct tpacket_stats stats1;
95 struct tpacket_stats_v3 stats3;
96};
97
98struct tpacket_auxdata {
99 __u32 tp_status;
100 __u32 tp_len;
101 __u32 tp_snaplen;
102 __u16 tp_mac;
103 __u16 tp_net;
104 __u16 tp_vlan_tci;
105 __u16 tp_vlan_tpid;
106};
107
108/* Rx ring - header status */
109#define TP_STATUS_KERNEL 0
110#define TP_STATUS_USER (1 << 0)
111#define TP_STATUS_COPY (1 << 1)
112#define TP_STATUS_LOSING (1 << 2)
113#define TP_STATUS_CSUMNOTREADY (1 << 3)
114#define TP_STATUS_VLAN_VALID (1 << 4) /* auxdata has valid tp_vlan_tci */
115#define TP_STATUS_BLK_TMO (1 << 5)
116#define TP_STATUS_VLAN_TPID_VALID (1 << 6) /* auxdata has valid tp_vlan_tpid */
117#define TP_STATUS_CSUM_VALID (1 << 7)
118#define TP_STATUS_GSO_TCP (1 << 8)
119
120/* Tx ring - header status */
121#define TP_STATUS_AVAILABLE 0
122#define TP_STATUS_SEND_REQUEST (1 << 0)
123#define TP_STATUS_SENDING (1 << 1)
124#define TP_STATUS_WRONG_FORMAT (1 << 2)
125
126/* Rx and Tx ring - header status */
127#define TP_STATUS_TS_SOFTWARE (1 << 29)
128#define TP_STATUS_TS_SYS_HARDWARE (1 << 30) /* deprecated, never set */
129#define TP_STATUS_TS_RAW_HARDWARE (1U << 31)
130
131/* Rx ring - feature request bits */
132#define TP_FT_REQ_FILL_RXHASH 0x1
133
134struct tpacket_hdr {
135 unsigned long tp_status;
136 unsigned int tp_len;
137 unsigned int tp_snaplen;
138 unsigned short tp_mac;
139 unsigned short tp_net;
140 unsigned int tp_sec;
141 unsigned int tp_usec;
142};
143
144#define TPACKET_ALIGNMENT 16
145#define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
146#define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
147
148struct tpacket2_hdr {
149 __u32 tp_status;
150 __u32 tp_len;
151 __u32 tp_snaplen;
152 __u16 tp_mac;
153 __u16 tp_net;
154 __u32 tp_sec;
155 __u32 tp_nsec;
156 __u16 tp_vlan_tci;
157 __u16 tp_vlan_tpid;
158 __u8 tp_padding[4];
159};
160
161struct tpacket_hdr_variant1 {
162 __u32 tp_rxhash;
163 __u32 tp_vlan_tci;
164 __u16 tp_vlan_tpid;
165 __u16 tp_padding;
166};
167
168struct tpacket3_hdr {
169 __u32 tp_next_offset;
170 __u32 tp_sec;
171 __u32 tp_nsec;
172 __u32 tp_snaplen;
173 __u32 tp_len;
174 __u32 tp_status;
175 __u16 tp_mac;
176 __u16 tp_net;
177 /* pkt_hdr variants */
178 union {
179 struct tpacket_hdr_variant1 hv1;
180 };
181 __u8 tp_padding[8];
182};
183
184struct tpacket_bd_ts {
185 unsigned int ts_sec;
186 union {
187 unsigned int ts_usec;
188 unsigned int ts_nsec;
189 };
190};
191
192struct tpacket_hdr_v1 {
193 __u32 block_status;
194 __u32 num_pkts;
195 __u32 offset_to_first_pkt;
196
197 /* Number of valid bytes (including padding)
198 * blk_len <= tp_block_size
199 */
200 __u32 blk_len;
201
202 /*
203 * Quite a few uses of sequence number:
204 * 1. Make sure cache flush etc worked.
205 * Well, one can argue - why not use the increasing ts below?
206 * But look at 2. below first.
207 * 2. When you pass around blocks to other user space decoders,
208 * you can see which blk[s] is[are] outstanding etc.
209 * 3. Validate kernel code.
210 */
211 __aligned_u64 seq_num;
212
213 /*
214 * ts_last_pkt:
215 *
216 * Case 1. Block has 'N'(N >=1) packets and TMO'd(timed out)
217 * ts_last_pkt == 'time-stamp of last packet' and NOT the
218 * time when the timer fired and the block was closed.
219 * By providing the ts of the last packet we can absolutely
220 * guarantee that time-stamp wise, the first packet in the
221 * next block will never precede the last packet of the
222 * previous block.
223 * Case 2. Block has zero packets and TMO'd
224 * ts_last_pkt = time when the timer fired and the block
225 * was closed.
226 * Case 3. Block has 'N' packets and NO TMO.
227 * ts_last_pkt = time-stamp of the last pkt in the block.
228 *
229 * ts_first_pkt:
230 * Is always the time-stamp when the block was opened.
231 * Case a) ZERO packets
232 * No packets to deal with but atleast you know the
233 * time-interval of this block.
234 * Case b) Non-zero packets
235 * Use the ts of the first packet in the block.
236 *
237 */
238 struct tpacket_bd_ts ts_first_pkt, ts_last_pkt;
239};
240
241union tpacket_bd_header_u {
242 struct tpacket_hdr_v1 bh1;
243};
244
245struct tpacket_block_desc {
246 __u32 version;
247 __u32 offset_to_priv;
248 union tpacket_bd_header_u hdr;
249};
250
251#define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
252#define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll))
253
254enum tpacket_versions {
255 TPACKET_V1,
256 TPACKET_V2,
257 TPACKET_V3
258};
259
260/*
261 Frame structure:
262
263 - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
264 - struct tpacket_hdr
265 - pad to TPACKET_ALIGNMENT=16
266 - struct sockaddr_ll
267 - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
268 - Start+tp_mac: [ Optional MAC header ]
269 - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
270 - Pad to align to TPACKET_ALIGNMENT=16
271 */
272
273struct tpacket_req {
274 unsigned int tp_block_size; /* Minimal size of contiguous block */
275 unsigned int tp_block_nr; /* Number of blocks */
276 unsigned int tp_frame_size; /* Size of frame */
277 unsigned int tp_frame_nr; /* Total number of frames */
278};
279
280struct tpacket_req3 {
281 unsigned int tp_block_size; /* Minimal size of contiguous block */
282 unsigned int tp_block_nr; /* Number of blocks */
283 unsigned int tp_frame_size; /* Size of frame */
284 unsigned int tp_frame_nr; /* Total number of frames */
285 unsigned int tp_retire_blk_tov; /* timeout in msecs */
286 unsigned int tp_sizeof_priv; /* offset to private data area */
287 unsigned int tp_feature_req_word;
288};
289
290union tpacket_req_u {
291 struct tpacket_req req;
292 struct tpacket_req3 req3;
293};
294
295struct packet_mreq {
296 int mr_ifindex;
297 unsigned short mr_type;
298 unsigned short mr_alen;
299 unsigned char mr_address[8];
300};
301
302struct fanout_args {
303#if defined(__LITTLE_ENDIAN_BITFIELD)
304 __u16 id;
305 __u16 type_flags;
306#else
307 __u16 type_flags;
308 __u16 id;
309#endif
310 __u32 max_num_members;
311};
312
313#define PACKET_MR_MULTICAST 0
314#define PACKET_MR_PROMISC 1
315#define PACKET_MR_ALLMULTI 2
316#define PACKET_MR_UNICAST 3
317
318#endif