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ba914908 | 1 | /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
5b26063c SH |
2 | #ifndef __LINUX_IF_PACKET_H |
3 | #define __LINUX_IF_PACKET_H | |
4 | ||
5 | #include <linux/types.h> | |
6 | ||
7 | struct sockaddr_pkt { | |
8 | unsigned short spkt_family; | |
9 | unsigned char spkt_device[14]; | |
10 | __be16 spkt_protocol; | |
11 | }; | |
12 | ||
13 | struct 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 | |
d9c0be4e | 60 | #define PACKET_IGNORE_OUTGOING 23 |
5b26063c SH |
61 | |
62 | #define PACKET_FANOUT_HASH 0 | |
63 | #define PACKET_FANOUT_LB 1 | |
64 | #define PACKET_FANOUT_CPU 2 | |
65 | #define PACKET_FANOUT_ROLLOVER 3 | |
66 | #define PACKET_FANOUT_RND 4 | |
67 | #define PACKET_FANOUT_QM 5 | |
68 | #define PACKET_FANOUT_CBPF 6 | |
69 | #define PACKET_FANOUT_EBPF 7 | |
70 | #define PACKET_FANOUT_FLAG_ROLLOVER 0x1000 | |
7ff1fce5 | 71 | #define PACKET_FANOUT_FLAG_UNIQUEID 0x2000 |
5b26063c SH |
72 | #define PACKET_FANOUT_FLAG_DEFRAG 0x8000 |
73 | ||
74 | struct tpacket_stats { | |
75 | unsigned int tp_packets; | |
76 | unsigned int tp_drops; | |
77 | }; | |
78 | ||
79 | struct tpacket_stats_v3 { | |
80 | unsigned int tp_packets; | |
81 | unsigned int tp_drops; | |
82 | unsigned int tp_freeze_q_cnt; | |
83 | }; | |
84 | ||
85 | struct tpacket_rollover_stats { | |
86 | __aligned_u64 tp_all; | |
87 | __aligned_u64 tp_huge; | |
88 | __aligned_u64 tp_failed; | |
89 | }; | |
90 | ||
91 | union tpacket_stats_u { | |
92 | struct tpacket_stats stats1; | |
93 | struct tpacket_stats_v3 stats3; | |
94 | }; | |
95 | ||
96 | struct tpacket_auxdata { | |
97 | __u32 tp_status; | |
98 | __u32 tp_len; | |
99 | __u32 tp_snaplen; | |
100 | __u16 tp_mac; | |
101 | __u16 tp_net; | |
102 | __u16 tp_vlan_tci; | |
103 | __u16 tp_vlan_tpid; | |
104 | }; | |
105 | ||
106 | /* Rx ring - header status */ | |
107 | #define TP_STATUS_KERNEL 0 | |
108 | #define TP_STATUS_USER (1 << 0) | |
109 | #define TP_STATUS_COPY (1 << 1) | |
110 | #define TP_STATUS_LOSING (1 << 2) | |
111 | #define TP_STATUS_CSUMNOTREADY (1 << 3) | |
112 | #define TP_STATUS_VLAN_VALID (1 << 4) /* auxdata has valid tp_vlan_tci */ | |
113 | #define TP_STATUS_BLK_TMO (1 << 5) | |
114 | #define TP_STATUS_VLAN_TPID_VALID (1 << 6) /* auxdata has valid tp_vlan_tpid */ | |
115 | #define TP_STATUS_CSUM_VALID (1 << 7) | |
116 | ||
117 | /* Tx ring - header status */ | |
118 | #define TP_STATUS_AVAILABLE 0 | |
119 | #define TP_STATUS_SEND_REQUEST (1 << 0) | |
120 | #define TP_STATUS_SENDING (1 << 1) | |
121 | #define TP_STATUS_WRONG_FORMAT (1 << 2) | |
122 | ||
123 | /* Rx and Tx ring - header status */ | |
124 | #define TP_STATUS_TS_SOFTWARE (1 << 29) | |
125 | #define TP_STATUS_TS_SYS_HARDWARE (1 << 30) /* deprecated, never set */ | |
126 | #define TP_STATUS_TS_RAW_HARDWARE (1 << 31) | |
127 | ||
128 | /* Rx ring - feature request bits */ | |
129 | #define TP_FT_REQ_FILL_RXHASH 0x1 | |
130 | ||
131 | struct tpacket_hdr { | |
132 | unsigned long tp_status; | |
133 | unsigned int tp_len; | |
134 | unsigned int tp_snaplen; | |
135 | unsigned short tp_mac; | |
136 | unsigned short tp_net; | |
137 | unsigned int tp_sec; | |
138 | unsigned int tp_usec; | |
139 | }; | |
140 | ||
141 | #define TPACKET_ALIGNMENT 16 | |
142 | #define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1)) | |
143 | #define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll)) | |
144 | ||
145 | struct tpacket2_hdr { | |
146 | __u32 tp_status; | |
147 | __u32 tp_len; | |
148 | __u32 tp_snaplen; | |
149 | __u16 tp_mac; | |
150 | __u16 tp_net; | |
151 | __u32 tp_sec; | |
152 | __u32 tp_nsec; | |
153 | __u16 tp_vlan_tci; | |
154 | __u16 tp_vlan_tpid; | |
155 | __u8 tp_padding[4]; | |
156 | }; | |
157 | ||
158 | struct tpacket_hdr_variant1 { | |
159 | __u32 tp_rxhash; | |
160 | __u32 tp_vlan_tci; | |
161 | __u16 tp_vlan_tpid; | |
162 | __u16 tp_padding; | |
163 | }; | |
164 | ||
165 | struct tpacket3_hdr { | |
166 | __u32 tp_next_offset; | |
167 | __u32 tp_sec; | |
168 | __u32 tp_nsec; | |
169 | __u32 tp_snaplen; | |
170 | __u32 tp_len; | |
171 | __u32 tp_status; | |
172 | __u16 tp_mac; | |
173 | __u16 tp_net; | |
174 | /* pkt_hdr variants */ | |
175 | union { | |
176 | struct tpacket_hdr_variant1 hv1; | |
177 | }; | |
178 | __u8 tp_padding[8]; | |
179 | }; | |
180 | ||
181 | struct tpacket_bd_ts { | |
182 | unsigned int ts_sec; | |
183 | union { | |
184 | unsigned int ts_usec; | |
185 | unsigned int ts_nsec; | |
186 | }; | |
187 | }; | |
188 | ||
189 | struct tpacket_hdr_v1 { | |
190 | __u32 block_status; | |
191 | __u32 num_pkts; | |
192 | __u32 offset_to_first_pkt; | |
193 | ||
194 | /* Number of valid bytes (including padding) | |
195 | * blk_len <= tp_block_size | |
196 | */ | |
197 | __u32 blk_len; | |
198 | ||
199 | /* | |
200 | * Quite a few uses of sequence number: | |
201 | * 1. Make sure cache flush etc worked. | |
202 | * Well, one can argue - why not use the increasing ts below? | |
203 | * But look at 2. below first. | |
204 | * 2. When you pass around blocks to other user space decoders, | |
205 | * you can see which blk[s] is[are] outstanding etc. | |
206 | * 3. Validate kernel code. | |
207 | */ | |
208 | __aligned_u64 seq_num; | |
209 | ||
210 | /* | |
211 | * ts_last_pkt: | |
212 | * | |
213 | * Case 1. Block has 'N'(N >=1) packets and TMO'd(timed out) | |
214 | * ts_last_pkt == 'time-stamp of last packet' and NOT the | |
215 | * time when the timer fired and the block was closed. | |
216 | * By providing the ts of the last packet we can absolutely | |
217 | * guarantee that time-stamp wise, the first packet in the | |
218 | * next block will never precede the last packet of the | |
219 | * previous block. | |
220 | * Case 2. Block has zero packets and TMO'd | |
221 | * ts_last_pkt = time when the timer fired and the block | |
222 | * was closed. | |
223 | * Case 3. Block has 'N' packets and NO TMO. | |
224 | * ts_last_pkt = time-stamp of the last pkt in the block. | |
225 | * | |
226 | * ts_first_pkt: | |
227 | * Is always the time-stamp when the block was opened. | |
228 | * Case a) ZERO packets | |
229 | * No packets to deal with but atleast you know the | |
230 | * time-interval of this block. | |
231 | * Case b) Non-zero packets | |
232 | * Use the ts of the first packet in the block. | |
233 | * | |
234 | */ | |
235 | struct tpacket_bd_ts ts_first_pkt, ts_last_pkt; | |
236 | }; | |
237 | ||
238 | union tpacket_bd_header_u { | |
239 | struct tpacket_hdr_v1 bh1; | |
240 | }; | |
241 | ||
242 | struct tpacket_block_desc { | |
243 | __u32 version; | |
244 | __u32 offset_to_priv; | |
245 | union tpacket_bd_header_u hdr; | |
246 | }; | |
247 | ||
248 | #define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll)) | |
249 | #define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll)) | |
250 | ||
251 | enum tpacket_versions { | |
252 | TPACKET_V1, | |
253 | TPACKET_V2, | |
254 | TPACKET_V3 | |
255 | }; | |
256 | ||
257 | /* | |
258 | Frame structure: | |
259 | ||
260 | - Start. Frame must be aligned to TPACKET_ALIGNMENT=16 | |
261 | - struct tpacket_hdr | |
262 | - pad to TPACKET_ALIGNMENT=16 | |
263 | - struct sockaddr_ll | |
264 | - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16 | |
265 | - Start+tp_mac: [ Optional MAC header ] | |
266 | - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16. | |
267 | - Pad to align to TPACKET_ALIGNMENT=16 | |
268 | */ | |
269 | ||
270 | struct tpacket_req { | |
271 | unsigned int tp_block_size; /* Minimal size of contiguous block */ | |
272 | unsigned int tp_block_nr; /* Number of blocks */ | |
273 | unsigned int tp_frame_size; /* Size of frame */ | |
274 | unsigned int tp_frame_nr; /* Total number of frames */ | |
275 | }; | |
276 | ||
277 | struct tpacket_req3 { | |
278 | unsigned int tp_block_size; /* Minimal size of contiguous block */ | |
279 | unsigned int tp_block_nr; /* Number of blocks */ | |
280 | unsigned int tp_frame_size; /* Size of frame */ | |
281 | unsigned int tp_frame_nr; /* Total number of frames */ | |
282 | unsigned int tp_retire_blk_tov; /* timeout in msecs */ | |
283 | unsigned int tp_sizeof_priv; /* offset to private data area */ | |
284 | unsigned int tp_feature_req_word; | |
285 | }; | |
286 | ||
287 | union tpacket_req_u { | |
288 | struct tpacket_req req; | |
289 | struct tpacket_req3 req3; | |
290 | }; | |
291 | ||
292 | struct packet_mreq { | |
293 | int mr_ifindex; | |
294 | unsigned short mr_type; | |
295 | unsigned short mr_alen; | |
296 | unsigned char mr_address[8]; | |
297 | }; | |
298 | ||
299 | #define PACKET_MR_MULTICAST 0 | |
300 | #define PACKET_MR_PROMISC 1 | |
301 | #define PACKET_MR_ALLMULTI 2 | |
302 | #define PACKET_MR_UNICAST 3 | |
303 | ||
304 | #endif |