1 #ifndef __LINUX_IF_PACKET_H 2 #define __LINUX_IF_PACKET_H 3 4 #include <linux/types.h> 5 6 struct sockaddr_pkt { 7 unsigned short spkt_family; 8 unsigned char spkt_device[14]; 9 __be16 spkt_protocol; 10 }; 11 12 struct sockaddr_ll { 13 unsigned short sll_family; 14 __be16 sll_protocol; 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 #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 */ 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 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 57 #define PACKET_ROLLOVER_STATS 21 58 #define PACKET_FANOUT_DATA 22 59 60 #define PACKET_FANOUT_HASH 0 61 #define PACKET_FANOUT_LB 1 62 #define PACKET_FANOUT_CPU 2 63 #define PACKET_FANOUT_ROLLOVER 3 64 #define PACKET_FANOUT_RND 4 65 #define PACKET_FANOUT_QM 5 66 #define PACKET_FANOUT_CBPF 6 67 #define PACKET_FANOUT_EBPF 7 68 #define PACKET_FANOUT_FLAG_ROLLOVER 0x1000 69 #define PACKET_FANOUT_FLAG_UNIQUEID 0x2000 70 #define PACKET_FANOUT_FLAG_DEFRAG 0x8000 71 72 struct tpacket_stats { 73 unsigned int tp_packets; 74 unsigned int tp_drops; 75 }; 76 77 struct tpacket_stats_v3 { 78 unsigned int tp_packets; 79 unsigned int tp_drops; 80 unsigned int tp_freeze_q_cnt; 81 }; 82 83 struct tpacket_rollover_stats { 84 __aligned_u64 tp_all; 85 __aligned_u64 tp_huge; 86 __aligned_u64 tp_failed; 87 }; 88 89 union tpacket_stats_u { 90 struct tpacket_stats stats1; 91 struct tpacket_stats_v3 stats3; 92 }; 93 94 struct tpacket_auxdata { 95 __u32 tp_status; 96 __u32 tp_len; 97 __u32 tp_snaplen; 98 __u16 tp_mac; 99 __u16 tp_net; 100 __u16 tp_vlan_tci; 101 __u16 tp_vlan_tpid; 102 }; 103 104 /* Rx ring - header status */ 105 #define TP_STATUS_KERNEL 0 106 #define TP_STATUS_USER (1 << 0) 107 #define TP_STATUS_COPY (1 << 1) 108 #define TP_STATUS_LOSING (1 << 2) 109 #define TP_STATUS_CSUMNOTREADY (1 << 3) 110 #define TP_STATUS_VLAN_VALID (1 << 4) /* auxdata has valid tp_vlan_tci */ 111 #define TP_STATUS_BLK_TMO (1 << 5) 112 #define TP_STATUS_VLAN_TPID_VALID (1 << 6) /* auxdata has valid tp_vlan_tpid */ 113 #define TP_STATUS_CSUM_VALID (1 << 7) 114 115 /* Tx ring - header status */ 116 #define TP_STATUS_AVAILABLE 0 117 #define TP_STATUS_SEND_REQUEST (1 << 0) 118 #define TP_STATUS_SENDING (1 << 1) 119 #define TP_STATUS_WRONG_FORMAT (1 << 2) 120 121 /* Rx and Tx ring - header status */ 122 #define TP_STATUS_TS_SOFTWARE (1 << 29) 123 #define TP_STATUS_TS_SYS_HARDWARE (1 << 30) /* deprecated, never set */ 124 #define TP_STATUS_TS_RAW_HARDWARE (1 << 31) 125 126 /* Rx ring - feature request bits */ 127 #define TP_FT_REQ_FILL_RXHASH 0x1 128 129 struct tpacket_hdr { 130 unsigned long tp_status; 131 unsigned int tp_len; 132 unsigned int tp_snaplen; 133 unsigned short tp_mac; 134 unsigned short tp_net; 135 unsigned int tp_sec; 136 unsigned int tp_usec; 137 }; 138 139 #define TPACKET_ALIGNMENT 16 140 #define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1)) 141 #define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll)) 142 143 struct tpacket2_hdr { 144 __u32 tp_status; 145 __u32 tp_len; 146 __u32 tp_snaplen; 147 __u16 tp_mac; 148 __u16 tp_net; 149 __u32 tp_sec; 150 __u32 tp_nsec; 151 __u16 tp_vlan_tci; 152 __u16 tp_vlan_tpid; 153 __u8 tp_padding[4]; 154 }; 155 156 struct tpacket_hdr_variant1 { 157 __u32 tp_rxhash; 158 __u32 tp_vlan_tci; 159 __u16 tp_vlan_tpid; 160 __u16 tp_padding; 161 }; 162 163 struct tpacket3_hdr { 164 __u32 tp_next_offset; 165 __u32 tp_sec; 166 __u32 tp_nsec; 167 __u32 tp_snaplen; 168 __u32 tp_len; 169 __u32 tp_status; 170 __u16 tp_mac; 171 __u16 tp_net; 172 /* pkt_hdr variants */ 173 union { 174 struct tpacket_hdr_variant1 hv1; 175 }; 176 __u8 tp_padding[8]; 177 }; 178 179 struct tpacket_bd_ts { 180 unsigned int ts_sec; 181 union { 182 unsigned int ts_usec; 183 unsigned int ts_nsec; 184 }; 185 }; 186 187 struct tpacket_hdr_v1 { 188 __u32 block_status; 189 __u32 num_pkts; 190 __u32 offset_to_first_pkt; 191 192 /* Number of valid bytes (including padding) 193 * blk_len <= tp_block_size 194 */ 195 __u32 blk_len; 196 197 /* 198 * Quite a few uses of sequence number: 199 * 1. Make sure cache flush etc worked. 200 * Well, one can argue - why not use the increasing ts below? 201 * But look at 2. below first. 202 * 2. When you pass around blocks to other user space decoders, 203 * you can see which blk[s] is[are] outstanding etc. 204 * 3. Validate kernel code. 205 */ 206 __aligned_u64 seq_num; 207 208 /* 209 * ts_last_pkt: 210 * 211 * Case 1. Block has 'N'(N >=1) packets and TMO'd(timed out) 212 * ts_last_pkt == 'time-stamp of last packet' and NOT the 213 * time when the timer fired and the block was closed. 214 * By providing the ts of the last packet we can absolutely 215 * guarantee that time-stamp wise, the first packet in the 216 * next block will never precede the last packet of the 217 * previous block. 218 * Case 2. Block has zero packets and TMO'd 219 * ts_last_pkt = time when the timer fired and the block 220 * was closed. 221 * Case 3. Block has 'N' packets and NO TMO. 222 * ts_last_pkt = time-stamp of the last pkt in the block. 223 * 224 * ts_first_pkt: 225 * Is always the time-stamp when the block was opened. 226 * Case a) ZERO packets 227 * No packets to deal with but atleast you know the 228 * time-interval of this block. 229 * Case b) Non-zero packets 230 * Use the ts of the first packet in the block. 231 * 232 */ 233 struct tpacket_bd_ts ts_first_pkt, ts_last_pkt; 234 }; 235 236 union tpacket_bd_header_u { 237 struct tpacket_hdr_v1 bh1; 238 }; 239 240 struct tpacket_block_desc { 241 __u32 version; 242 __u32 offset_to_priv; 243 union tpacket_bd_header_u hdr; 244 }; 245 246 #define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll)) 247 #define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll)) 248 249 enum tpacket_versions { 250 TPACKET_V1, 251 TPACKET_V2, 252 TPACKET_V3 253 }; 254 255 /* 256 Frame structure: 257 258 - Start. Frame must be aligned to TPACKET_ALIGNMENT=16 259 - struct tpacket_hdr 260 - pad to TPACKET_ALIGNMENT=16 261 - struct sockaddr_ll 262 - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16 263 - Start+tp_mac: [ Optional MAC header ] 264 - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16. 265 - Pad to align to TPACKET_ALIGNMENT=16 266 */ 267 268 struct tpacket_req { 269 unsigned int tp_block_size; /* Minimal size of contiguous block */ 270 unsigned int tp_block_nr; /* Number of blocks */ 271 unsigned int tp_frame_size; /* Size of frame */ 272 unsigned int tp_frame_nr; /* Total number of frames */ 273 }; 274 275 struct tpacket_req3 { 276 unsigned int tp_block_size; /* Minimal size of contiguous block */ 277 unsigned int tp_block_nr; /* Number of blocks */ 278 unsigned int tp_frame_size; /* Size of frame */ 279 unsigned int tp_frame_nr; /* Total number of frames */ 280 unsigned int tp_retire_blk_tov; /* timeout in msecs */ 281 unsigned int tp_sizeof_priv; /* offset to private data area */ 282 unsigned int tp_feature_req_word; 283 }; 284 285 union tpacket_req_u { 286 struct tpacket_req req; 287 struct tpacket_req3 req3; 288 }; 289 290 struct packet_mreq { 291 int mr_ifindex; 292 unsigned short mr_type; 293 unsigned short mr_alen; 294 unsigned char mr_address[8]; 295 }; 296 297 #define PACKET_MR_MULTICAST 0 298 #define PACKET_MR_PROMISC 1 299 #define PACKET_MR_ALLMULTI 2 300 #define PACKET_MR_UNICAST 3 301 302 #endif 303