Commit | Line | Data |
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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 */ | |
1da177e4 | 29 | #define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */ |
604d13c9 DB |
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 */ | |
1da177e4 LT |
33 | #define PACKET_FASTROUTE 6 /* Fastrouted frame */ |
34 | ||
35 | /* Packet socket options */ | |
36 | ||
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 | |
8dc41944 | 44 | #define PACKET_AUXDATA 8 |
80feaacb | 45 | #define PACKET_ORIGDEV 9 |
bbd6ef87 PM |
46 | #define PACKET_VERSION 10 |
47 | #define PACKET_HDRLEN 11 | |
8913336a | 48 | #define PACKET_RESERVE 12 |
69e3c75f JB |
49 | #define PACKET_TX_RING 13 |
50 | #define PACKET_LOSS 14 | |
bfd5f4a3 | 51 | #define PACKET_VNET_HDR 15 |
ed85b565 | 52 | #define PACKET_TX_TIMESTAMP 16 |
614f60fa | 53 | #define PACKET_TIMESTAMP 17 |
dc99f600 | 54 | #define PACKET_FANOUT 18 |
5920cd3a | 55 | #define PACKET_TX_HAS_OFF 19 |
d346a3fa | 56 | #define PACKET_QDISC_BYPASS 20 |
dc99f600 DM |
57 | |
58 | #define PACKET_FANOUT_HASH 0 | |
59 | #define PACKET_FANOUT_LB 1 | |
95ec3eb4 | 60 | #define PACKET_FANOUT_CPU 2 |
77f65ebd | 61 | #define PACKET_FANOUT_ROLLOVER 3 |
5df0ddfb | 62 | #define PACKET_FANOUT_RND 4 |
2d36097d | 63 | #define PACKET_FANOUT_QM 5 |
77f65ebd | 64 | #define PACKET_FANOUT_FLAG_ROLLOVER 0x1000 |
7736d33f | 65 | #define PACKET_FANOUT_FLAG_DEFRAG 0x8000 |
1da177e4 | 66 | |
d94d9fee | 67 | struct tpacket_stats { |
1da177e4 LT |
68 | unsigned int tp_packets; |
69 | unsigned int tp_drops; | |
70 | }; | |
71 | ||
0d4691ce | 72 | struct tpacket_stats_v3 { |
73 | unsigned int tp_packets; | |
74 | unsigned int tp_drops; | |
75 | unsigned int tp_freeze_q_cnt; | |
76 | }; | |
77 | ||
78 | union tpacket_stats_u { | |
79 | struct tpacket_stats stats1; | |
80 | struct tpacket_stats_v3 stats3; | |
81 | }; | |
82 | ||
d94d9fee | 83 | struct tpacket_auxdata { |
8dc41944 HX |
84 | __u32 tp_status; |
85 | __u32 tp_len; | |
86 | __u32 tp_snaplen; | |
87 | __u16 tp_mac; | |
88 | __u16 tp_net; | |
393e52e3 | 89 | __u16 tp_vlan_tci; |
a0cdfcf3 | 90 | __u16 tp_vlan_tpid; |
8dc41944 HX |
91 | }; |
92 | ||
69e3c75f | 93 | /* Rx ring - header status */ |
a0cdfcf3 AW |
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 */ | |
69e3c75f JB |
102 | |
103 | /* Tx ring - header status */ | |
7276d5d7 DB |
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) | |
69e3c75f | 108 | |
b9c32fb2 DB |
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) | |
113 | ||
0d4691ce | 114 | /* Rx ring - feature request bits */ |
115 | #define TP_FT_REQ_FILL_RXHASH 0x1 | |
116 | ||
d94d9fee | 117 | struct tpacket_hdr { |
1da177e4 | 118 | unsigned long tp_status; |
1da177e4 LT |
119 | unsigned int tp_len; |
120 | unsigned int tp_snaplen; | |
121 | unsigned short tp_mac; | |
122 | unsigned short tp_net; | |
123 | unsigned int tp_sec; | |
124 | unsigned int tp_usec; | |
125 | }; | |
126 | ||
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)) | |
130 | ||
d94d9fee | 131 | struct tpacket2_hdr { |
bbd6ef87 PM |
132 | __u32 tp_status; |
133 | __u32 tp_len; | |
134 | __u32 tp_snaplen; | |
135 | __u16 tp_mac; | |
136 | __u16 tp_net; | |
137 | __u32 tp_sec; | |
138 | __u32 tp_nsec; | |
393e52e3 | 139 | __u16 tp_vlan_tci; |
a0cdfcf3 AW |
140 | __u16 tp_vlan_tpid; |
141 | __u8 tp_padding[4]; | |
bbd6ef87 PM |
142 | }; |
143 | ||
bc59ba39 | 144 | struct tpacket_hdr_variant1 { |
0d4691ce | 145 | __u32 tp_rxhash; |
146 | __u32 tp_vlan_tci; | |
a0cdfcf3 AW |
147 | __u16 tp_vlan_tpid; |
148 | __u16 tp_padding; | |
0d4691ce | 149 | }; |
150 | ||
151 | struct tpacket3_hdr { | |
152 | __u32 tp_next_offset; | |
153 | __u32 tp_sec; | |
154 | __u32 tp_nsec; | |
155 | __u32 tp_snaplen; | |
156 | __u32 tp_len; | |
157 | __u32 tp_status; | |
158 | __u16 tp_mac; | |
159 | __u16 tp_net; | |
160 | /* pkt_hdr variants */ | |
161 | union { | |
bc59ba39 | 162 | struct tpacket_hdr_variant1 hv1; |
0d4691ce | 163 | }; |
a0cdfcf3 | 164 | __u8 tp_padding[8]; |
0d4691ce | 165 | }; |
166 | ||
bc59ba39 | 167 | struct tpacket_bd_ts { |
0d4691ce | 168 | unsigned int ts_sec; |
169 | union { | |
170 | unsigned int ts_usec; | |
171 | unsigned int ts_nsec; | |
172 | }; | |
173 | }; | |
174 | ||
bc59ba39 | 175 | struct tpacket_hdr_v1 { |
0d4691ce | 176 | __u32 block_status; |
177 | __u32 num_pkts; | |
178 | __u32 offset_to_first_pkt; | |
179 | ||
180 | /* Number of valid bytes (including padding) | |
181 | * blk_len <= tp_block_size | |
182 | */ | |
183 | __u32 blk_len; | |
184 | ||
185 | /* | |
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. | |
193 | */ | |
96c13184 | 194 | __aligned_u64 seq_num; |
0d4691ce | 195 | |
196 | /* | |
197 | * ts_last_pkt: | |
198 | * | |
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 | |
205 | * previous block. | |
206 | * Case 2. Block has zero packets and TMO'd | |
207 | * ts_last_pkt = time when the timer fired and the block | |
208 | * was closed. | |
209 | * Case 3. Block has 'N' packets and NO TMO. | |
210 | * ts_last_pkt = time-stamp of the last pkt in the block. | |
211 | * | |
212 | * ts_first_pkt: | |
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. | |
219 | * | |
220 | */ | |
bc59ba39 | 221 | struct tpacket_bd_ts ts_first_pkt, ts_last_pkt; |
0d4691ce | 222 | }; |
223 | ||
bc59ba39 | 224 | union tpacket_bd_header_u { |
225 | struct tpacket_hdr_v1 bh1; | |
0d4691ce | 226 | }; |
227 | ||
bc59ba39 | 228 | struct tpacket_block_desc { |
0d4691ce | 229 | __u32 version; |
230 | __u32 offset_to_priv; | |
bc59ba39 | 231 | union tpacket_bd_header_u hdr; |
0d4691ce | 232 | }; |
233 | ||
bbd6ef87 | 234 | #define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll)) |
0d4691ce | 235 | #define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll)) |
bbd6ef87 | 236 | |
d94d9fee | 237 | enum tpacket_versions { |
bbd6ef87 PM |
238 | TPACKET_V1, |
239 | TPACKET_V2, | |
0d4691ce | 240 | TPACKET_V3 |
bbd6ef87 PM |
241 | }; |
242 | ||
1da177e4 LT |
243 | /* |
244 | Frame structure: | |
245 | ||
246 | - Start. Frame must be aligned to TPACKET_ALIGNMENT=16 | |
247 | - struct tpacket_hdr | |
248 | - pad to TPACKET_ALIGNMENT=16 | |
249 | - struct sockaddr_ll | |
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 | |
254 | */ | |
255 | ||
d94d9fee | 256 | struct tpacket_req { |
1da177e4 LT |
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 */ | |
261 | }; | |
262 | ||
0d4691ce | 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; | |
271 | }; | |
272 | ||
273 | union tpacket_req_u { | |
274 | struct tpacket_req req; | |
275 | struct tpacket_req3 req3; | |
276 | }; | |
277 | ||
d94d9fee | 278 | struct packet_mreq { |
1da177e4 LT |
279 | int mr_ifindex; |
280 | unsigned short mr_type; | |
281 | unsigned short mr_alen; | |
282 | unsigned char mr_address[8]; | |
283 | }; | |
284 | ||
285 | #define PACKET_MR_MULTICAST 0 | |
286 | #define PACKET_MR_PROMISC 1 | |
287 | #define PACKET_MR_ALLMULTI 2 | |
d95ed927 | 288 | #define PACKET_MR_UNICAST 3 |
1da177e4 LT |
289 | |
290 | #endif |