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 #define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */
30 #define PACKET_USER 6 /* To user space */
31 #define PACKET_KERNEL 7 /* To kernel space */
32 /* Unused, PACKET_FASTROUTE and PACKET_LOOPBACK are invisible to user space */
33 #define PACKET_FASTROUTE 6 /* Fastrouted frame */
35 /* Packet socket options */
37 #define PACKET_ADD_MEMBERSHIP 1
38 #define PACKET_DROP_MEMBERSHIP 2
39 #define PACKET_RECV_OUTPUT 3
40 /* Value 4 is still used by obsolete turbo-packet. */
41 #define PACKET_RX_RING 5
42 #define PACKET_STATISTICS 6
43 #define PACKET_COPY_THRESH 7
44 #define PACKET_AUXDATA 8
45 #define PACKET_ORIGDEV 9
46 #define PACKET_VERSION 10
47 #define PACKET_HDRLEN 11
48 #define PACKET_RESERVE 12
49 #define PACKET_TX_RING 13
50 #define PACKET_LOSS 14
51 #define PACKET_VNET_HDR 15
52 #define PACKET_TX_TIMESTAMP 16
53 #define PACKET_TIMESTAMP 17
54 #define PACKET_FANOUT 18
55 #define PACKET_TX_HAS_OFF 19
56 #define PACKET_QDISC_BYPASS 20
58 #define PACKET_FANOUT_HASH 0
59 #define PACKET_FANOUT_LB 1
60 #define PACKET_FANOUT_CPU 2
61 #define PACKET_FANOUT_ROLLOVER 3
62 #define PACKET_FANOUT_RND 4
63 #define PACKET_FANOUT_QM 5
64 #define PACKET_FANOUT_FLAG_ROLLOVER 0x1000
65 #define PACKET_FANOUT_FLAG_DEFRAG 0x8000
67 struct tpacket_stats {
68 unsigned int tp_packets;
69 unsigned int tp_drops;
72 struct tpacket_stats_v3 {
73 unsigned int tp_packets;
74 unsigned int tp_drops;
75 unsigned int tp_freeze_q_cnt;
78 union tpacket_stats_u {
79 struct tpacket_stats stats1;
80 struct tpacket_stats_v3 stats3;
83 struct tpacket_auxdata {
93 /* Rx ring - header status */
94 #define TP_STATUS_KERNEL 0
95 #define TP_STATUS_USER (1 << 0)
96 #define TP_STATUS_COPY (1 << 1)
97 #define TP_STATUS_LOSING (1 << 2)
98 #define TP_STATUS_CSUMNOTREADY (1 << 3)
99 #define TP_STATUS_VLAN_VALID (1 << 4) /* auxdata has valid tp_vlan_tci */
100 #define TP_STATUS_BLK_TMO (1 << 5)
101 #define TP_STATUS_VLAN_TPID_VALID (1 << 6) /* auxdata has valid tp_vlan_tpid */
103 /* Tx ring - header status */
104 #define TP_STATUS_AVAILABLE 0
105 #define TP_STATUS_SEND_REQUEST (1 << 0)
106 #define TP_STATUS_SENDING (1 << 1)
107 #define TP_STATUS_WRONG_FORMAT (1 << 2)
109 /* Rx and Tx ring - header status */
110 #define TP_STATUS_TS_SOFTWARE (1 << 29)
111 #define TP_STATUS_TS_SYS_HARDWARE (1 << 30)
112 #define TP_STATUS_TS_RAW_HARDWARE (1 << 31)
114 /* Rx ring - feature request bits */
115 #define TP_FT_REQ_FILL_RXHASH 0x1
118 unsigned long tp_status;
120 unsigned int tp_snaplen;
121 unsigned short tp_mac;
122 unsigned short tp_net;
124 unsigned int tp_usec;
127 #define TPACKET_ALIGNMENT 16
128 #define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
129 #define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
131 struct tpacket2_hdr {
144 struct tpacket_hdr_variant1 {
151 struct tpacket3_hdr {
152 __u32 tp_next_offset;
160 /* pkt_hdr variants */
162 struct tpacket_hdr_variant1 hv1;
167 struct tpacket_bd_ts {
170 unsigned int ts_usec;
171 unsigned int ts_nsec;
175 struct tpacket_hdr_v1 {
178 __u32 offset_to_first_pkt;
180 /* Number of valid bytes (including padding)
181 * blk_len <= tp_block_size
186 * Quite a few uses of sequence number:
187 * 1. Make sure cache flush etc worked.
188 * Well, one can argue - why not use the increasing ts below?
189 * But look at 2. below first.
190 * 2. When you pass around blocks to other user space decoders,
191 * you can see which blk[s] is[are] outstanding etc.
192 * 3. Validate kernel code.
194 __aligned_u64 seq_num;
199 * Case 1. Block has 'N'(N >=1) packets and TMO'd(timed out)
200 * ts_last_pkt == 'time-stamp of last packet' and NOT the
201 * time when the timer fired and the block was closed.
202 * By providing the ts of the last packet we can absolutely
203 * guarantee that time-stamp wise, the first packet in the
204 * next block will never precede the last packet of the
206 * Case 2. Block has zero packets and TMO'd
207 * ts_last_pkt = time when the timer fired and the block
209 * Case 3. Block has 'N' packets and NO TMO.
210 * ts_last_pkt = time-stamp of the last pkt in the block.
213 * Is always the time-stamp when the block was opened.
214 * Case a) ZERO packets
215 * No packets to deal with but atleast you know the
216 * time-interval of this block.
217 * Case b) Non-zero packets
218 * Use the ts of the first packet in the block.
221 struct tpacket_bd_ts ts_first_pkt, ts_last_pkt;
224 union tpacket_bd_header_u {
225 struct tpacket_hdr_v1 bh1;
228 struct tpacket_block_desc {
230 __u32 offset_to_priv;
231 union tpacket_bd_header_u hdr;
234 #define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
235 #define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll))
237 enum tpacket_versions {
246 - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
248 - pad to TPACKET_ALIGNMENT=16
250 - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
251 - Start+tp_mac: [ Optional MAC header ]
252 - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
253 - Pad to align to TPACKET_ALIGNMENT=16
257 unsigned int tp_block_size; /* Minimal size of contiguous block */
258 unsigned int tp_block_nr; /* Number of blocks */
259 unsigned int tp_frame_size; /* Size of frame */
260 unsigned int tp_frame_nr; /* Total number of frames */
263 struct tpacket_req3 {
264 unsigned int tp_block_size; /* Minimal size of contiguous block */
265 unsigned int tp_block_nr; /* Number of blocks */
266 unsigned int tp_frame_size; /* Size of frame */
267 unsigned int tp_frame_nr; /* Total number of frames */
268 unsigned int tp_retire_blk_tov; /* timeout in msecs */
269 unsigned int tp_sizeof_priv; /* offset to private data area */
270 unsigned int tp_feature_req_word;
273 union tpacket_req_u {
274 struct tpacket_req req;
275 struct tpacket_req3 req3;
280 unsigned short mr_type;
281 unsigned short mr_alen;
282 unsigned char mr_address[8];
285 #define PACKET_MR_MULTICAST 0
286 #define PACKET_MR_PROMISC 1
287 #define PACKET_MR_ALLMULTI 2
288 #define PACKET_MR_UNICAST 3