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1da177e4 LT |
1 | #ifndef __LINUX_IF_PACKET_H |
2 | #define __LINUX_IF_PACKET_H | |
3 | ||
0e11c91e AV |
4 | #include <linux/types.h> |
5 | ||
d94d9fee | 6 | struct sockaddr_pkt { |
1da177e4 LT |
7 | unsigned short spkt_family; |
8 | unsigned char spkt_device[14]; | |
0e11c91e | 9 | __be16 spkt_protocol; |
1da177e4 LT |
10 | }; |
11 | ||
d94d9fee | 12 | struct sockaddr_ll { |
1da177e4 | 13 | unsigned short sll_family; |
0e11c91e | 14 | __be16 sll_protocol; |
1da177e4 LT |
15 | int sll_ifindex; |
16 | unsigned short sll_hatype; | |
17 | unsigned char sll_pkttype; | |
18 | unsigned char sll_halen; | |
19 | unsigned char sll_addr[8]; | |
20 | }; | |
21 | ||
22 | /* Packet types */ | |
23 | ||
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 */ | |
32 | ||
33 | /* Packet socket options */ | |
34 | ||
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 | |
8dc41944 | 42 | #define PACKET_AUXDATA 8 |
80feaacb | 43 | #define PACKET_ORIGDEV 9 |
bbd6ef87 PM |
44 | #define PACKET_VERSION 10 |
45 | #define PACKET_HDRLEN 11 | |
8913336a | 46 | #define PACKET_RESERVE 12 |
69e3c75f JB |
47 | #define PACKET_TX_RING 13 |
48 | #define PACKET_LOSS 14 | |
bfd5f4a3 | 49 | #define PACKET_VNET_HDR 15 |
ed85b565 | 50 | #define PACKET_TX_TIMESTAMP 16 |
614f60fa | 51 | #define PACKET_TIMESTAMP 17 |
dc99f600 | 52 | #define PACKET_FANOUT 18 |
5920cd3a | 53 | #define PACKET_TX_HAS_OFF 19 |
dc99f600 DM |
54 | |
55 | #define PACKET_FANOUT_HASH 0 | |
56 | #define PACKET_FANOUT_LB 1 | |
95ec3eb4 | 57 | #define PACKET_FANOUT_CPU 2 |
77f65ebd | 58 | #define PACKET_FANOUT_ROLLOVER 3 |
5df0ddfb | 59 | #define PACKET_FANOUT_RND 4 |
77f65ebd | 60 | #define PACKET_FANOUT_FLAG_ROLLOVER 0x1000 |
7736d33f | 61 | #define PACKET_FANOUT_FLAG_DEFRAG 0x8000 |
1da177e4 | 62 | |
d94d9fee | 63 | struct tpacket_stats { |
1da177e4 LT |
64 | unsigned int tp_packets; |
65 | unsigned int tp_drops; | |
66 | }; | |
67 | ||
0d4691ce | 68 | struct tpacket_stats_v3 { |
69 | unsigned int tp_packets; | |
70 | unsigned int tp_drops; | |
71 | unsigned int tp_freeze_q_cnt; | |
72 | }; | |
73 | ||
74 | union tpacket_stats_u { | |
75 | struct tpacket_stats stats1; | |
76 | struct tpacket_stats_v3 stats3; | |
77 | }; | |
78 | ||
d94d9fee | 79 | struct tpacket_auxdata { |
8dc41944 HX |
80 | __u32 tp_status; |
81 | __u32 tp_len; | |
82 | __u32 tp_snaplen; | |
83 | __u16 tp_mac; | |
84 | __u16 tp_net; | |
393e52e3 | 85 | __u16 tp_vlan_tci; |
13fcb7bd | 86 | __u16 tp_padding; |
8dc41944 HX |
87 | }; |
88 | ||
69e3c75f | 89 | /* Rx ring - header status */ |
7276d5d7 DB |
90 | #define TP_STATUS_KERNEL 0 |
91 | #define TP_STATUS_USER (1 << 0) | |
92 | #define TP_STATUS_COPY (1 << 1) | |
93 | #define TP_STATUS_LOSING (1 << 2) | |
94 | #define TP_STATUS_CSUMNOTREADY (1 << 3) | |
95 | #define TP_STATUS_VLAN_VALID (1 << 4) /* auxdata has valid tp_vlan_tci */ | |
96 | #define TP_STATUS_BLK_TMO (1 << 5) | |
69e3c75f JB |
97 | |
98 | /* Tx ring - header status */ | |
7276d5d7 DB |
99 | #define TP_STATUS_AVAILABLE 0 |
100 | #define TP_STATUS_SEND_REQUEST (1 << 0) | |
101 | #define TP_STATUS_SENDING (1 << 1) | |
102 | #define TP_STATUS_WRONG_FORMAT (1 << 2) | |
69e3c75f | 103 | |
b9c32fb2 DB |
104 | /* Rx and Tx ring - header status */ |
105 | #define TP_STATUS_TS_SOFTWARE (1 << 29) | |
106 | #define TP_STATUS_TS_SYS_HARDWARE (1 << 30) | |
107 | #define TP_STATUS_TS_RAW_HARDWARE (1 << 31) | |
108 | ||
0d4691ce | 109 | /* Rx ring - feature request bits */ |
110 | #define TP_FT_REQ_FILL_RXHASH 0x1 | |
111 | ||
d94d9fee | 112 | struct tpacket_hdr { |
1da177e4 | 113 | unsigned long tp_status; |
1da177e4 LT |
114 | unsigned int tp_len; |
115 | unsigned int tp_snaplen; | |
116 | unsigned short tp_mac; | |
117 | unsigned short tp_net; | |
118 | unsigned int tp_sec; | |
119 | unsigned int tp_usec; | |
120 | }; | |
121 | ||
122 | #define TPACKET_ALIGNMENT 16 | |
123 | #define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1)) | |
124 | #define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll)) | |
125 | ||
d94d9fee | 126 | struct tpacket2_hdr { |
bbd6ef87 PM |
127 | __u32 tp_status; |
128 | __u32 tp_len; | |
129 | __u32 tp_snaplen; | |
130 | __u16 tp_mac; | |
131 | __u16 tp_net; | |
132 | __u32 tp_sec; | |
133 | __u32 tp_nsec; | |
393e52e3 | 134 | __u16 tp_vlan_tci; |
13fcb7bd | 135 | __u16 tp_padding; |
bbd6ef87 PM |
136 | }; |
137 | ||
bc59ba39 | 138 | struct tpacket_hdr_variant1 { |
0d4691ce | 139 | __u32 tp_rxhash; |
140 | __u32 tp_vlan_tci; | |
141 | }; | |
142 | ||
143 | struct tpacket3_hdr { | |
144 | __u32 tp_next_offset; | |
145 | __u32 tp_sec; | |
146 | __u32 tp_nsec; | |
147 | __u32 tp_snaplen; | |
148 | __u32 tp_len; | |
149 | __u32 tp_status; | |
150 | __u16 tp_mac; | |
151 | __u16 tp_net; | |
152 | /* pkt_hdr variants */ | |
153 | union { | |
bc59ba39 | 154 | struct tpacket_hdr_variant1 hv1; |
0d4691ce | 155 | }; |
156 | }; | |
157 | ||
bc59ba39 | 158 | struct tpacket_bd_ts { |
0d4691ce | 159 | unsigned int ts_sec; |
160 | union { | |
161 | unsigned int ts_usec; | |
162 | unsigned int ts_nsec; | |
163 | }; | |
164 | }; | |
165 | ||
bc59ba39 | 166 | struct tpacket_hdr_v1 { |
0d4691ce | 167 | __u32 block_status; |
168 | __u32 num_pkts; | |
169 | __u32 offset_to_first_pkt; | |
170 | ||
171 | /* Number of valid bytes (including padding) | |
172 | * blk_len <= tp_block_size | |
173 | */ | |
174 | __u32 blk_len; | |
175 | ||
176 | /* | |
177 | * Quite a few uses of sequence number: | |
178 | * 1. Make sure cache flush etc worked. | |
179 | * Well, one can argue - why not use the increasing ts below? | |
180 | * But look at 2. below first. | |
181 | * 2. When you pass around blocks to other user space decoders, | |
182 | * you can see which blk[s] is[are] outstanding etc. | |
183 | * 3. Validate kernel code. | |
184 | */ | |
96c13184 | 185 | __aligned_u64 seq_num; |
0d4691ce | 186 | |
187 | /* | |
188 | * ts_last_pkt: | |
189 | * | |
190 | * Case 1. Block has 'N'(N >=1) packets and TMO'd(timed out) | |
191 | * ts_last_pkt == 'time-stamp of last packet' and NOT the | |
192 | * time when the timer fired and the block was closed. | |
193 | * By providing the ts of the last packet we can absolutely | |
194 | * guarantee that time-stamp wise, the first packet in the | |
195 | * next block will never precede the last packet of the | |
196 | * previous block. | |
197 | * Case 2. Block has zero packets and TMO'd | |
198 | * ts_last_pkt = time when the timer fired and the block | |
199 | * was closed. | |
200 | * Case 3. Block has 'N' packets and NO TMO. | |
201 | * ts_last_pkt = time-stamp of the last pkt in the block. | |
202 | * | |
203 | * ts_first_pkt: | |
204 | * Is always the time-stamp when the block was opened. | |
205 | * Case a) ZERO packets | |
206 | * No packets to deal with but atleast you know the | |
207 | * time-interval of this block. | |
208 | * Case b) Non-zero packets | |
209 | * Use the ts of the first packet in the block. | |
210 | * | |
211 | */ | |
bc59ba39 | 212 | struct tpacket_bd_ts ts_first_pkt, ts_last_pkt; |
0d4691ce | 213 | }; |
214 | ||
bc59ba39 | 215 | union tpacket_bd_header_u { |
216 | struct tpacket_hdr_v1 bh1; | |
0d4691ce | 217 | }; |
218 | ||
bc59ba39 | 219 | struct tpacket_block_desc { |
0d4691ce | 220 | __u32 version; |
221 | __u32 offset_to_priv; | |
bc59ba39 | 222 | union tpacket_bd_header_u hdr; |
0d4691ce | 223 | }; |
224 | ||
bbd6ef87 | 225 | #define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll)) |
0d4691ce | 226 | #define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll)) |
bbd6ef87 | 227 | |
d94d9fee | 228 | enum tpacket_versions { |
bbd6ef87 PM |
229 | TPACKET_V1, |
230 | TPACKET_V2, | |
0d4691ce | 231 | TPACKET_V3 |
bbd6ef87 PM |
232 | }; |
233 | ||
1da177e4 LT |
234 | /* |
235 | Frame structure: | |
236 | ||
237 | - Start. Frame must be aligned to TPACKET_ALIGNMENT=16 | |
238 | - struct tpacket_hdr | |
239 | - pad to TPACKET_ALIGNMENT=16 | |
240 | - struct sockaddr_ll | |
241 | - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16 | |
242 | - Start+tp_mac: [ Optional MAC header ] | |
243 | - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16. | |
244 | - Pad to align to TPACKET_ALIGNMENT=16 | |
245 | */ | |
246 | ||
d94d9fee | 247 | struct tpacket_req { |
1da177e4 LT |
248 | unsigned int tp_block_size; /* Minimal size of contiguous block */ |
249 | unsigned int tp_block_nr; /* Number of blocks */ | |
250 | unsigned int tp_frame_size; /* Size of frame */ | |
251 | unsigned int tp_frame_nr; /* Total number of frames */ | |
252 | }; | |
253 | ||
0d4691ce | 254 | struct tpacket_req3 { |
255 | unsigned int tp_block_size; /* Minimal size of contiguous block */ | |
256 | unsigned int tp_block_nr; /* Number of blocks */ | |
257 | unsigned int tp_frame_size; /* Size of frame */ | |
258 | unsigned int tp_frame_nr; /* Total number of frames */ | |
259 | unsigned int tp_retire_blk_tov; /* timeout in msecs */ | |
260 | unsigned int tp_sizeof_priv; /* offset to private data area */ | |
261 | unsigned int tp_feature_req_word; | |
262 | }; | |
263 | ||
264 | union tpacket_req_u { | |
265 | struct tpacket_req req; | |
266 | struct tpacket_req3 req3; | |
267 | }; | |
268 | ||
d94d9fee | 269 | struct packet_mreq { |
1da177e4 LT |
270 | int mr_ifindex; |
271 | unsigned short mr_type; | |
272 | unsigned short mr_alen; | |
273 | unsigned char mr_address[8]; | |
274 | }; | |
275 | ||
276 | #define PACKET_MR_MULTICAST 0 | |
277 | #define PACKET_MR_PROMISC 1 | |
278 | #define PACKET_MR_ALLMULTI 2 | |
d95ed927 | 279 | #define PACKET_MR_UNICAST 3 |
1da177e4 LT |
280 | |
281 | #endif |