1 #ifndef __LINUX_IF_PACKET_H
2 #define __LINUX_IF_PACKET_H
4 #include <linux/types.h>
7 unsigned short spkt_family;
8 unsigned char spkt_device[14];
13 unsigned short sll_family;
16 unsigned short sll_hatype;
17 unsigned char sll_pkttype;
18 unsigned char sll_halen;
19 unsigned char sll_addr[8];
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 */
33 /* Packet socket options */
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 #define PACKET_TX_HAS_OFF 19
54 #define PACKET_QDISC_BYPASS 20
56 #define PACKET_FANOUT_HASH 0
57 #define PACKET_FANOUT_LB 1
58 #define PACKET_FANOUT_CPU 2
59 #define PACKET_FANOUT_ROLLOVER 3
60 #define PACKET_FANOUT_RND 4
61 #define PACKET_FANOUT_FLAG_ROLLOVER 0x1000
62 #define PACKET_FANOUT_FLAG_DEFRAG 0x8000
64 struct tpacket_stats {
65 unsigned int tp_packets;
66 unsigned int tp_drops;
69 struct tpacket_stats_v3 {
70 unsigned int tp_packets;
71 unsigned int tp_drops;
72 unsigned int tp_freeze_q_cnt;
75 union tpacket_stats_u {
76 struct tpacket_stats stats1;
77 struct tpacket_stats_v3 stats3;
80 struct tpacket_auxdata {
90 /* Rx ring - header status */
91 #define TP_STATUS_KERNEL 0
92 #define TP_STATUS_USER (1 << 0)
93 #define TP_STATUS_COPY (1 << 1)
94 #define TP_STATUS_LOSING (1 << 2)
95 #define TP_STATUS_CSUMNOTREADY (1 << 3)
96 #define TP_STATUS_VLAN_VALID (1 << 4) /* auxdata has valid tp_vlan_tci */
97 #define TP_STATUS_BLK_TMO (1 << 5)
99 /* Tx ring - header status */
100 #define TP_STATUS_AVAILABLE 0
101 #define TP_STATUS_SEND_REQUEST (1 << 0)
102 #define TP_STATUS_SENDING (1 << 1)
103 #define TP_STATUS_WRONG_FORMAT (1 << 2)
105 /* Rx and Tx ring - header status */
106 #define TP_STATUS_TS_SOFTWARE (1 << 29)
107 #define TP_STATUS_TS_SYS_HARDWARE (1 << 30)
108 #define TP_STATUS_TS_RAW_HARDWARE (1 << 31)
110 /* Rx ring - feature request bits */
111 #define TP_FT_REQ_FILL_RXHASH 0x1
114 unsigned long tp_status;
116 unsigned int tp_snaplen;
117 unsigned short tp_mac;
118 unsigned short tp_net;
120 unsigned int tp_usec;
123 #define TPACKET_ALIGNMENT 16
124 #define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
125 #define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
127 struct tpacket2_hdr {
139 struct tpacket_hdr_variant1 {
144 struct tpacket3_hdr {
145 __u32 tp_next_offset;
153 /* pkt_hdr variants */
155 struct tpacket_hdr_variant1 hv1;
159 struct tpacket_bd_ts {
162 unsigned int ts_usec;
163 unsigned int ts_nsec;
167 struct tpacket_hdr_v1 {
170 __u32 offset_to_first_pkt;
172 /* Number of valid bytes (including padding)
173 * blk_len <= tp_block_size
178 * Quite a few uses of sequence number:
179 * 1. Make sure cache flush etc worked.
180 * Well, one can argue - why not use the increasing ts below?
181 * But look at 2. below first.
182 * 2. When you pass around blocks to other user space decoders,
183 * you can see which blk[s] is[are] outstanding etc.
184 * 3. Validate kernel code.
186 __aligned_u64 seq_num;
191 * Case 1. Block has 'N'(N >=1) packets and TMO'd(timed out)
192 * ts_last_pkt == 'time-stamp of last packet' and NOT the
193 * time when the timer fired and the block was closed.
194 * By providing the ts of the last packet we can absolutely
195 * guarantee that time-stamp wise, the first packet in the
196 * next block will never precede the last packet of the
198 * Case 2. Block has zero packets and TMO'd
199 * ts_last_pkt = time when the timer fired and the block
201 * Case 3. Block has 'N' packets and NO TMO.
202 * ts_last_pkt = time-stamp of the last pkt in the block.
205 * Is always the time-stamp when the block was opened.
206 * Case a) ZERO packets
207 * No packets to deal with but atleast you know the
208 * time-interval of this block.
209 * Case b) Non-zero packets
210 * Use the ts of the first packet in the block.
213 struct tpacket_bd_ts ts_first_pkt, ts_last_pkt;
216 union tpacket_bd_header_u {
217 struct tpacket_hdr_v1 bh1;
220 struct tpacket_block_desc {
222 __u32 offset_to_priv;
223 union tpacket_bd_header_u hdr;
226 #define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
227 #define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll))
229 enum tpacket_versions {
238 - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
240 - pad to TPACKET_ALIGNMENT=16
242 - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
243 - Start+tp_mac: [ Optional MAC header ]
244 - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
245 - Pad to align to TPACKET_ALIGNMENT=16
249 unsigned int tp_block_size; /* Minimal size of contiguous block */
250 unsigned int tp_block_nr; /* Number of blocks */
251 unsigned int tp_frame_size; /* Size of frame */
252 unsigned int tp_frame_nr; /* Total number of frames */
255 struct tpacket_req3 {
256 unsigned int tp_block_size; /* Minimal size of contiguous block */
257 unsigned int tp_block_nr; /* Number of blocks */
258 unsigned int tp_frame_size; /* Size of frame */
259 unsigned int tp_frame_nr; /* Total number of frames */
260 unsigned int tp_retire_blk_tov; /* timeout in msecs */
261 unsigned int tp_sizeof_priv; /* offset to private data area */
262 unsigned int tp_feature_req_word;
265 union tpacket_req_u {
266 struct tpacket_req req;
267 struct tpacket_req3 req3;
272 unsigned short mr_type;
273 unsigned short mr_alen;
274 unsigned char mr_address[8];
277 #define PACKET_MR_MULTICAST 0
278 #define PACKET_MR_PROMISC 1
279 #define PACKET_MR_ALLMULTI 2
280 #define PACKET_MR_UNICAST 3