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
55 #define PACKET_FANOUT_HASH 0
56 #define PACKET_FANOUT_LB 1
57 #define PACKET_FANOUT_CPU 2
58 #define PACKET_FANOUT_ROLLOVER 3
59 #define PACKET_FANOUT_FLAG_ROLLOVER 0x1000
60 #define PACKET_FANOUT_FLAG_DEFRAG 0x8000
62 struct tpacket_stats {
63 unsigned int tp_packets;
64 unsigned int tp_drops;
67 struct tpacket_stats_v3 {
68 unsigned int tp_packets;
69 unsigned int tp_drops;
70 unsigned int tp_freeze_q_cnt;
73 union tpacket_stats_u {
74 struct tpacket_stats stats1;
75 struct tpacket_stats_v3 stats3;
78 struct tpacket_auxdata {
88 /* Rx ring - header status */
89 #define TP_STATUS_KERNEL 0x0
90 #define TP_STATUS_USER 0x1
91 #define TP_STATUS_COPY 0x2
92 #define TP_STATUS_LOSING 0x4
93 #define TP_STATUS_CSUMNOTREADY 0x8
94 #define TP_STATUS_VLAN_VALID 0x10 /* auxdata has valid tp_vlan_tci */
95 #define TP_STATUS_BLK_TMO 0x20
97 /* Tx ring - header status */
98 #define TP_STATUS_AVAILABLE 0x0
99 #define TP_STATUS_SEND_REQUEST 0x1
100 #define TP_STATUS_SENDING 0x2
101 #define TP_STATUS_WRONG_FORMAT 0x4
103 /* Rx ring - feature request bits */
104 #define TP_FT_REQ_FILL_RXHASH 0x1
107 unsigned long tp_status;
109 unsigned int tp_snaplen;
110 unsigned short tp_mac;
111 unsigned short tp_net;
113 unsigned int tp_usec;
116 #define TPACKET_ALIGNMENT 16
117 #define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
118 #define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
120 struct tpacket2_hdr {
132 struct tpacket_hdr_variant1 {
137 struct tpacket3_hdr {
138 __u32 tp_next_offset;
146 /* pkt_hdr variants */
148 struct tpacket_hdr_variant1 hv1;
152 struct tpacket_bd_ts {
155 unsigned int ts_usec;
156 unsigned int ts_nsec;
160 struct tpacket_hdr_v1 {
163 __u32 offset_to_first_pkt;
165 /* Number of valid bytes (including padding)
166 * blk_len <= tp_block_size
171 * Quite a few uses of sequence number:
172 * 1. Make sure cache flush etc worked.
173 * Well, one can argue - why not use the increasing ts below?
174 * But look at 2. below first.
175 * 2. When you pass around blocks to other user space decoders,
176 * you can see which blk[s] is[are] outstanding etc.
177 * 3. Validate kernel code.
179 __aligned_u64 seq_num;
184 * Case 1. Block has 'N'(N >=1) packets and TMO'd(timed out)
185 * ts_last_pkt == 'time-stamp of last packet' and NOT the
186 * time when the timer fired and the block was closed.
187 * By providing the ts of the last packet we can absolutely
188 * guarantee that time-stamp wise, the first packet in the
189 * next block will never precede the last packet of the
191 * Case 2. Block has zero packets and TMO'd
192 * ts_last_pkt = time when the timer fired and the block
194 * Case 3. Block has 'N' packets and NO TMO.
195 * ts_last_pkt = time-stamp of the last pkt in the block.
198 * Is always the time-stamp when the block was opened.
199 * Case a) ZERO packets
200 * No packets to deal with but atleast you know the
201 * time-interval of this block.
202 * Case b) Non-zero packets
203 * Use the ts of the first packet in the block.
206 struct tpacket_bd_ts ts_first_pkt, ts_last_pkt;
209 union tpacket_bd_header_u {
210 struct tpacket_hdr_v1 bh1;
213 struct tpacket_block_desc {
215 __u32 offset_to_priv;
216 union tpacket_bd_header_u hdr;
219 #define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
220 #define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll))
222 enum tpacket_versions {
231 - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
233 - pad to TPACKET_ALIGNMENT=16
235 - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
236 - Start+tp_mac: [ Optional MAC header ]
237 - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
238 - Pad to align to TPACKET_ALIGNMENT=16
242 unsigned int tp_block_size; /* Minimal size of contiguous block */
243 unsigned int tp_block_nr; /* Number of blocks */
244 unsigned int tp_frame_size; /* Size of frame */
245 unsigned int tp_frame_nr; /* Total number of frames */
248 struct tpacket_req3 {
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 */
253 unsigned int tp_retire_blk_tov; /* timeout in msecs */
254 unsigned int tp_sizeof_priv; /* offset to private data area */
255 unsigned int tp_feature_req_word;
258 union tpacket_req_u {
259 struct tpacket_req req;
260 struct tpacket_req3 req3;
265 unsigned short mr_type;
266 unsigned short mr_alen;
267 unsigned char mr_address[8];
270 #define PACKET_MR_MULTICAST 0
271 #define PACKET_MR_PROMISC 1
272 #define PACKET_MR_ALLMULTI 2
273 #define PACKET_MR_UNICAST 3