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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 DM |
52 | #define PACKET_FANOUT 18 |
53 | ||
54 | #define PACKET_FANOUT_HASH 0 | |
55 | #define PACKET_FANOUT_LB 1 | |
95ec3eb4 | 56 | #define PACKET_FANOUT_CPU 2 |
7736d33f | 57 | #define PACKET_FANOUT_FLAG_DEFRAG 0x8000 |
1da177e4 | 58 | |
d94d9fee | 59 | struct tpacket_stats { |
1da177e4 LT |
60 | unsigned int tp_packets; |
61 | unsigned int tp_drops; | |
62 | }; | |
63 | ||
0d4691ce | 64 | struct tpacket_stats_v3 { |
65 | unsigned int tp_packets; | |
66 | unsigned int tp_drops; | |
67 | unsigned int tp_freeze_q_cnt; | |
68 | }; | |
69 | ||
70 | union tpacket_stats_u { | |
71 | struct tpacket_stats stats1; | |
72 | struct tpacket_stats_v3 stats3; | |
73 | }; | |
74 | ||
d94d9fee | 75 | struct tpacket_auxdata { |
8dc41944 HX |
76 | __u32 tp_status; |
77 | __u32 tp_len; | |
78 | __u32 tp_snaplen; | |
79 | __u16 tp_mac; | |
80 | __u16 tp_net; | |
393e52e3 | 81 | __u16 tp_vlan_tci; |
13fcb7bd | 82 | __u16 tp_padding; |
8dc41944 HX |
83 | }; |
84 | ||
69e3c75f JB |
85 | /* Rx ring - header status */ |
86 | #define TP_STATUS_KERNEL 0x0 | |
87 | #define TP_STATUS_USER 0x1 | |
88 | #define TP_STATUS_COPY 0x2 | |
89 | #define TP_STATUS_LOSING 0x4 | |
90 | #define TP_STATUS_CSUMNOTREADY 0x8 | |
a3bcc23e | 91 | #define TP_STATUS_VLAN_VALID 0x10 /* auxdata has valid tp_vlan_tci */ |
0d4691ce | 92 | #define TP_STATUS_BLK_TMO 0x20 |
69e3c75f JB |
93 | |
94 | /* Tx ring - header status */ | |
95 | #define TP_STATUS_AVAILABLE 0x0 | |
96 | #define TP_STATUS_SEND_REQUEST 0x1 | |
97 | #define TP_STATUS_SENDING 0x2 | |
98 | #define TP_STATUS_WRONG_FORMAT 0x4 | |
99 | ||
0d4691ce | 100 | /* Rx ring - feature request bits */ |
101 | #define TP_FT_REQ_FILL_RXHASH 0x1 | |
102 | ||
d94d9fee | 103 | struct tpacket_hdr { |
1da177e4 | 104 | unsigned long tp_status; |
1da177e4 LT |
105 | unsigned int tp_len; |
106 | unsigned int tp_snaplen; | |
107 | unsigned short tp_mac; | |
108 | unsigned short tp_net; | |
109 | unsigned int tp_sec; | |
110 | unsigned int tp_usec; | |
111 | }; | |
112 | ||
113 | #define TPACKET_ALIGNMENT 16 | |
114 | #define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1)) | |
115 | #define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll)) | |
116 | ||
d94d9fee | 117 | struct tpacket2_hdr { |
bbd6ef87 PM |
118 | __u32 tp_status; |
119 | __u32 tp_len; | |
120 | __u32 tp_snaplen; | |
121 | __u16 tp_mac; | |
122 | __u16 tp_net; | |
123 | __u32 tp_sec; | |
124 | __u32 tp_nsec; | |
393e52e3 | 125 | __u16 tp_vlan_tci; |
13fcb7bd | 126 | __u16 tp_padding; |
bbd6ef87 PM |
127 | }; |
128 | ||
bc59ba39 | 129 | struct tpacket_hdr_variant1 { |
0d4691ce | 130 | __u32 tp_rxhash; |
131 | __u32 tp_vlan_tci; | |
132 | }; | |
133 | ||
134 | struct tpacket3_hdr { | |
135 | __u32 tp_next_offset; | |
136 | __u32 tp_sec; | |
137 | __u32 tp_nsec; | |
138 | __u32 tp_snaplen; | |
139 | __u32 tp_len; | |
140 | __u32 tp_status; | |
141 | __u16 tp_mac; | |
142 | __u16 tp_net; | |
143 | /* pkt_hdr variants */ | |
144 | union { | |
bc59ba39 | 145 | struct tpacket_hdr_variant1 hv1; |
0d4691ce | 146 | }; |
147 | }; | |
148 | ||
bc59ba39 | 149 | struct tpacket_bd_ts { |
0d4691ce | 150 | unsigned int ts_sec; |
151 | union { | |
152 | unsigned int ts_usec; | |
153 | unsigned int ts_nsec; | |
154 | }; | |
155 | }; | |
156 | ||
bc59ba39 | 157 | struct tpacket_hdr_v1 { |
0d4691ce | 158 | __u32 block_status; |
159 | __u32 num_pkts; | |
160 | __u32 offset_to_first_pkt; | |
161 | ||
162 | /* Number of valid bytes (including padding) | |
163 | * blk_len <= tp_block_size | |
164 | */ | |
165 | __u32 blk_len; | |
166 | ||
167 | /* | |
168 | * Quite a few uses of sequence number: | |
169 | * 1. Make sure cache flush etc worked. | |
170 | * Well, one can argue - why not use the increasing ts below? | |
171 | * But look at 2. below first. | |
172 | * 2. When you pass around blocks to other user space decoders, | |
173 | * you can see which blk[s] is[are] outstanding etc. | |
174 | * 3. Validate kernel code. | |
175 | */ | |
96c13184 | 176 | __aligned_u64 seq_num; |
0d4691ce | 177 | |
178 | /* | |
179 | * ts_last_pkt: | |
180 | * | |
181 | * Case 1. Block has 'N'(N >=1) packets and TMO'd(timed out) | |
182 | * ts_last_pkt == 'time-stamp of last packet' and NOT the | |
183 | * time when the timer fired and the block was closed. | |
184 | * By providing the ts of the last packet we can absolutely | |
185 | * guarantee that time-stamp wise, the first packet in the | |
186 | * next block will never precede the last packet of the | |
187 | * previous block. | |
188 | * Case 2. Block has zero packets and TMO'd | |
189 | * ts_last_pkt = time when the timer fired and the block | |
190 | * was closed. | |
191 | * Case 3. Block has 'N' packets and NO TMO. | |
192 | * ts_last_pkt = time-stamp of the last pkt in the block. | |
193 | * | |
194 | * ts_first_pkt: | |
195 | * Is always the time-stamp when the block was opened. | |
196 | * Case a) ZERO packets | |
197 | * No packets to deal with but atleast you know the | |
198 | * time-interval of this block. | |
199 | * Case b) Non-zero packets | |
200 | * Use the ts of the first packet in the block. | |
201 | * | |
202 | */ | |
bc59ba39 | 203 | struct tpacket_bd_ts ts_first_pkt, ts_last_pkt; |
0d4691ce | 204 | }; |
205 | ||
bc59ba39 | 206 | union tpacket_bd_header_u { |
207 | struct tpacket_hdr_v1 bh1; | |
0d4691ce | 208 | }; |
209 | ||
bc59ba39 | 210 | struct tpacket_block_desc { |
0d4691ce | 211 | __u32 version; |
212 | __u32 offset_to_priv; | |
bc59ba39 | 213 | union tpacket_bd_header_u hdr; |
0d4691ce | 214 | }; |
215 | ||
bbd6ef87 | 216 | #define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll)) |
0d4691ce | 217 | #define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll)) |
bbd6ef87 | 218 | |
d94d9fee | 219 | enum tpacket_versions { |
bbd6ef87 PM |
220 | TPACKET_V1, |
221 | TPACKET_V2, | |
0d4691ce | 222 | TPACKET_V3 |
bbd6ef87 PM |
223 | }; |
224 | ||
1da177e4 LT |
225 | /* |
226 | Frame structure: | |
227 | ||
228 | - Start. Frame must be aligned to TPACKET_ALIGNMENT=16 | |
229 | - struct tpacket_hdr | |
230 | - pad to TPACKET_ALIGNMENT=16 | |
231 | - struct sockaddr_ll | |
232 | - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16 | |
233 | - Start+tp_mac: [ Optional MAC header ] | |
234 | - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16. | |
235 | - Pad to align to TPACKET_ALIGNMENT=16 | |
236 | */ | |
237 | ||
d94d9fee | 238 | struct tpacket_req { |
1da177e4 LT |
239 | unsigned int tp_block_size; /* Minimal size of contiguous block */ |
240 | unsigned int tp_block_nr; /* Number of blocks */ | |
241 | unsigned int tp_frame_size; /* Size of frame */ | |
242 | unsigned int tp_frame_nr; /* Total number of frames */ | |
243 | }; | |
244 | ||
0d4691ce | 245 | struct tpacket_req3 { |
246 | unsigned int tp_block_size; /* Minimal size of contiguous block */ | |
247 | unsigned int tp_block_nr; /* Number of blocks */ | |
248 | unsigned int tp_frame_size; /* Size of frame */ | |
249 | unsigned int tp_frame_nr; /* Total number of frames */ | |
250 | unsigned int tp_retire_blk_tov; /* timeout in msecs */ | |
251 | unsigned int tp_sizeof_priv; /* offset to private data area */ | |
252 | unsigned int tp_feature_req_word; | |
253 | }; | |
254 | ||
255 | union tpacket_req_u { | |
256 | struct tpacket_req req; | |
257 | struct tpacket_req3 req3; | |
258 | }; | |
259 | ||
d94d9fee | 260 | struct packet_mreq { |
1da177e4 LT |
261 | int mr_ifindex; |
262 | unsigned short mr_type; | |
263 | unsigned short mr_alen; | |
264 | unsigned char mr_address[8]; | |
265 | }; | |
266 | ||
267 | #define PACKET_MR_MULTICAST 0 | |
268 | #define PACKET_MR_PROMISC 1 | |
269 | #define PACKET_MR_ALLMULTI 2 | |
d95ed927 | 270 | #define PACKET_MR_UNICAST 3 |
1da177e4 LT |
271 | |
272 | #endif |