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