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