1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef __LINUX_IF_PACKET_H
3 #define __LINUX_IF_PACKET_H
5 #include <asm/byteorder.h>
6 #include <linux/types.h>
9 unsigned short spkt_family;
10 unsigned char spkt_device[14];
15 unsigned short sll_family;
18 unsigned short sll_hatype;
19 unsigned char sll_pkttype;
20 unsigned char sll_halen;
21 unsigned char sll_addr[8];
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 */
37 /* Packet socket options */
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 #define PACKET_VNET_HDR_SZ 24
64 #define PACKET_FANOUT_HASH 0
65 #define PACKET_FANOUT_LB 1
66 #define PACKET_FANOUT_CPU 2
67 #define PACKET_FANOUT_ROLLOVER 3
68 #define PACKET_FANOUT_RND 4
69 #define PACKET_FANOUT_QM 5
70 #define PACKET_FANOUT_CBPF 6
71 #define PACKET_FANOUT_EBPF 7
72 #define PACKET_FANOUT_FLAG_ROLLOVER 0x1000
73 #define PACKET_FANOUT_FLAG_UNIQUEID 0x2000
74 #define PACKET_FANOUT_FLAG_IGNORE_OUTGOING 0x4000
75 #define PACKET_FANOUT_FLAG_DEFRAG 0x8000
77 struct tpacket_stats {
78 unsigned int tp_packets;
79 unsigned int tp_drops;
82 struct tpacket_stats_v3 {
83 unsigned int tp_packets;
84 unsigned int tp_drops;
85 unsigned int tp_freeze_q_cnt;
88 struct tpacket_rollover_stats {
90 __aligned_u64 tp_huge;
91 __aligned_u64 tp_failed;
94 union tpacket_stats_u {
95 struct tpacket_stats stats1;
96 struct tpacket_stats_v3 stats3;
99 struct tpacket_auxdata {
109 /* Rx ring - header status */
110 #define TP_STATUS_KERNEL 0
111 #define TP_STATUS_USER (1 << 0)
112 #define TP_STATUS_COPY (1 << 1)
113 #define TP_STATUS_LOSING (1 << 2)
114 #define TP_STATUS_CSUMNOTREADY (1 << 3)
115 #define TP_STATUS_VLAN_VALID (1 << 4) /* auxdata has valid tp_vlan_tci */
116 #define TP_STATUS_BLK_TMO (1 << 5)
117 #define TP_STATUS_VLAN_TPID_VALID (1 << 6) /* auxdata has valid tp_vlan_tpid */
118 #define TP_STATUS_CSUM_VALID (1 << 7)
119 #define TP_STATUS_GSO_TCP (1 << 8)
121 /* Tx ring - header status */
122 #define TP_STATUS_AVAILABLE 0
123 #define TP_STATUS_SEND_REQUEST (1 << 0)
124 #define TP_STATUS_SENDING (1 << 1)
125 #define TP_STATUS_WRONG_FORMAT (1 << 2)
127 /* Rx and Tx ring - header status */
128 #define TP_STATUS_TS_SOFTWARE (1 << 29)
129 #define TP_STATUS_TS_SYS_HARDWARE (1 << 30) /* deprecated, never set */
130 #define TP_STATUS_TS_RAW_HARDWARE (1U << 31)
132 /* Rx ring - feature request bits */
133 #define TP_FT_REQ_FILL_RXHASH 0x1
136 unsigned long tp_status;
138 unsigned int tp_snaplen;
139 unsigned short tp_mac;
140 unsigned short tp_net;
142 unsigned int tp_usec;
145 #define TPACKET_ALIGNMENT 16
146 #define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
147 #define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
149 struct tpacket2_hdr {
162 struct tpacket_hdr_variant1 {
169 struct tpacket3_hdr {
170 __u32 tp_next_offset;
178 /* pkt_hdr variants */
180 struct tpacket_hdr_variant1 hv1;
185 struct tpacket_bd_ts {
188 unsigned int ts_usec;
189 unsigned int ts_nsec;
193 struct tpacket_hdr_v1 {
196 __u32 offset_to_first_pkt;
198 /* Number of valid bytes (including padding)
199 * blk_len <= tp_block_size
204 * Quite a few uses of sequence number:
205 * 1. Make sure cache flush etc worked.
206 * Well, one can argue - why not use the increasing ts below?
207 * But look at 2. below first.
208 * 2. When you pass around blocks to other user space decoders,
209 * you can see which blk[s] is[are] outstanding etc.
210 * 3. Validate kernel code.
212 __aligned_u64 seq_num;
217 * Case 1. Block has 'N'(N >=1) packets and TMO'd(timed out)
218 * ts_last_pkt == 'time-stamp of last packet' and NOT the
219 * time when the timer fired and the block was closed.
220 * By providing the ts of the last packet we can absolutely
221 * guarantee that time-stamp wise, the first packet in the
222 * next block will never precede the last packet of the
224 * Case 2. Block has zero packets and TMO'd
225 * ts_last_pkt = time when the timer fired and the block
227 * Case 3. Block has 'N' packets and NO TMO.
228 * ts_last_pkt = time-stamp of the last pkt in the block.
231 * Is always the time-stamp when the block was opened.
232 * Case a) ZERO packets
233 * No packets to deal with but atleast you know the
234 * time-interval of this block.
235 * Case b) Non-zero packets
236 * Use the ts of the first packet in the block.
239 struct tpacket_bd_ts ts_first_pkt, ts_last_pkt;
242 union tpacket_bd_header_u {
243 struct tpacket_hdr_v1 bh1;
246 struct tpacket_block_desc {
248 __u32 offset_to_priv;
249 union tpacket_bd_header_u hdr;
252 #define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
253 #define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll))
255 enum tpacket_versions {
264 - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
266 - pad to TPACKET_ALIGNMENT=16
268 - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
269 - Start+tp_mac: [ Optional MAC header ]
270 - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
271 - Pad to align to TPACKET_ALIGNMENT=16
275 unsigned int tp_block_size; /* Minimal size of contiguous block */
276 unsigned int tp_block_nr; /* Number of blocks */
277 unsigned int tp_frame_size; /* Size of frame */
278 unsigned int tp_frame_nr; /* Total number of frames */
281 struct tpacket_req3 {
282 unsigned int tp_block_size; /* Minimal size of contiguous block */
283 unsigned int tp_block_nr; /* Number of blocks */
284 unsigned int tp_frame_size; /* Size of frame */
285 unsigned int tp_frame_nr; /* Total number of frames */
286 unsigned int tp_retire_blk_tov; /* timeout in msecs */
287 unsigned int tp_sizeof_priv; /* offset to private data area */
288 unsigned int tp_feature_req_word;
291 union tpacket_req_u {
292 struct tpacket_req req;
293 struct tpacket_req3 req3;
298 unsigned short mr_type;
299 unsigned short mr_alen;
300 unsigned char mr_address[8];
304 #if defined(__LITTLE_ENDIAN_BITFIELD)
311 __u32 max_num_members;
314 #define PACKET_MR_MULTICAST 0
315 #define PACKET_MR_PROMISC 1
316 #define PACKET_MR_ALLMULTI 2
317 #define PACKET_MR_UNICAST 3