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 /* 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 42 #define PACKET_AUXDATA 8 43 #define PACKET_ORIGDEV 9 44 #define PACKET_VERSION 10 45 #define PACKET_HDRLEN 11 46 #define PACKET_RESERVE 12 47 #define PACKET_TX_RING 13 48 #define PACKET_LOSS 14 49 #define PACKET_VNET_HDR 15 50 #define PACKET_TX_TIMESTAMP 16 51 #define PACKET_TIMESTAMP 17 52 #define PACKET_FANOUT 18 53 #define PACKET_TX_HAS_OFF 19 54 #define PACKET_QDISC_BYPASS 20 55 56 #define PACKET_FANOUT_HASH 0 57 #define PACKET_FANOUT_LB 1 58 #define PACKET_FANOUT_CPU 2 59 #define PACKET_FANOUT_ROLLOVER 3 60 #define PACKET_FANOUT_RND 4 61 #define PACKET_FANOUT_FLAG_ROLLOVER 0x1000 62 #define PACKET_FANOUT_FLAG_DEFRAG 0x8000 63 64 struct tpacket_stats { 65 unsigned int tp_packets; 66 unsigned int tp_drops; 67 }; 68 69 struct tpacket_stats_v3 { 70 unsigned int tp_packets; 71 unsigned int tp_drops; 72 unsigned int tp_freeze_q_cnt; 73 }; 74 75 union tpacket_stats_u { 76 struct tpacket_stats stats1; 77 struct tpacket_stats_v3 stats3; 78 }; 79 80 struct tpacket_auxdata { 81 __u32 tp_status; 82 __u32 tp_len; 83 __u32 tp_snaplen; 84 __u16 tp_mac; 85 __u16 tp_net; 86 __u16 tp_vlan_tci; 87 __u16 tp_vlan_tpid; 88 }; 89 90 /* Rx ring - header status */ 91 #define TP_STATUS_KERNEL 0 92 #define TP_STATUS_USER (1 << 0) 93 #define TP_STATUS_COPY (1 << 1) 94 #define TP_STATUS_LOSING (1 << 2) 95 #define TP_STATUS_CSUMNOTREADY (1 << 3) 96 #define TP_STATUS_VLAN_VALID (1 << 4) /* auxdata has valid tp_vlan_tci */ 97 #define TP_STATUS_BLK_TMO (1 << 5) 98 #define TP_STATUS_VLAN_TPID_VALID (1 << 6) /* auxdata has valid tp_vlan_tpid */ 99 100 /* Tx ring - header status */ 101 #define TP_STATUS_AVAILABLE 0 102 #define TP_STATUS_SEND_REQUEST (1 << 0) 103 #define TP_STATUS_SENDING (1 << 1) 104 #define TP_STATUS_WRONG_FORMAT (1 << 2) 105 106 /* Rx and Tx ring - header status */ 107 #define TP_STATUS_TS_SOFTWARE (1 << 29) 108 #define TP_STATUS_TS_SYS_HARDWARE (1 << 30) 109 #define TP_STATUS_TS_RAW_HARDWARE (1 << 31) 110 111 /* Rx ring - feature request bits */ 112 #define TP_FT_REQ_FILL_RXHASH 0x1 113 114 struct tpacket_hdr { 115 unsigned long tp_status; 116 unsigned int tp_len; 117 unsigned int tp_snaplen; 118 unsigned short tp_mac; 119 unsigned short tp_net; 120 unsigned int tp_sec; 121 unsigned int tp_usec; 122 }; 123 124 #define TPACKET_ALIGNMENT 16 125 #define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1)) 126 #define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll)) 127 128 struct tpacket2_hdr { 129 __u32 tp_status; 130 __u32 tp_len; 131 __u32 tp_snaplen; 132 __u16 tp_mac; 133 __u16 tp_net; 134 __u32 tp_sec; 135 __u32 tp_nsec; 136 __u16 tp_vlan_tci; 137 __u16 tp_vlan_tpid; 138 __u8 tp_padding[4]; 139 }; 140 141 struct tpacket_hdr_variant1 { 142 __u32 tp_rxhash; 143 __u32 tp_vlan_tci; 144 __u16 tp_vlan_tpid; 145 __u16 tp_padding; 146 }; 147 148 struct tpacket3_hdr { 149 __u32 tp_next_offset; 150 __u32 tp_sec; 151 __u32 tp_nsec; 152 __u32 tp_snaplen; 153 __u32 tp_len; 154 __u32 tp_status; 155 __u16 tp_mac; 156 __u16 tp_net; 157 /* pkt_hdr variants */ 158 union { 159 struct tpacket_hdr_variant1 hv1; 160 }; 161 __u8 tp_padding[8]; 162 }; 163 164 struct tpacket_bd_ts { 165 unsigned int ts_sec; 166 union { 167 unsigned int ts_usec; 168 unsigned int ts_nsec; 169 }; 170 }; 171 172 struct tpacket_hdr_v1 { 173 __u32 block_status; 174 __u32 num_pkts; 175 __u32 offset_to_first_pkt; 176 177 /* Number of valid bytes (including padding) 178 * blk_len <= tp_block_size 179 */ 180 __u32 blk_len; 181 182 /* 183 * Quite a few uses of sequence number: 184 * 1. Make sure cache flush etc worked. 185 * Well, one can argue - why not use the increasing ts below? 186 * But look at 2. below first. 187 * 2. When you pass around blocks to other user space decoders, 188 * you can see which blk[s] is[are] outstanding etc. 189 * 3. Validate kernel code. 190 */ 191 __aligned_u64 seq_num; 192 193 /* 194 * ts_last_pkt: 195 * 196 * Case 1. Block has 'N'(N >=1) packets and TMO'd(timed out) 197 * ts_last_pkt == 'time-stamp of last packet' and NOT the 198 * time when the timer fired and the block was closed. 199 * By providing the ts of the last packet we can absolutely 200 * guarantee that time-stamp wise, the first packet in the 201 * next block will never precede the last packet of the 202 * previous block. 203 * Case 2. Block has zero packets and TMO'd 204 * ts_last_pkt = time when the timer fired and the block 205 * was closed. 206 * Case 3. Block has 'N' packets and NO TMO. 207 * ts_last_pkt = time-stamp of the last pkt in the block. 208 * 209 * ts_first_pkt: 210 * Is always the time-stamp when the block was opened. 211 * Case a) ZERO packets 212 * No packets to deal with but atleast you know the 213 * time-interval of this block. 214 * Case b) Non-zero packets 215 * Use the ts of the first packet in the block. 216 * 217 */ 218 struct tpacket_bd_ts ts_first_pkt, ts_last_pkt; 219 }; 220 221 union tpacket_bd_header_u { 222 struct tpacket_hdr_v1 bh1; 223 }; 224 225 struct tpacket_block_desc { 226 __u32 version; 227 __u32 offset_to_priv; 228 union tpacket_bd_header_u hdr; 229 }; 230 231 #define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll)) 232 #define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll)) 233 234 enum tpacket_versions { 235 TPACKET_V1, 236 TPACKET_V2, 237 TPACKET_V3 238 }; 239 240 /* 241 Frame structure: 242 243 - Start. Frame must be aligned to TPACKET_ALIGNMENT=16 244 - struct tpacket_hdr 245 - pad to TPACKET_ALIGNMENT=16 246 - struct sockaddr_ll 247 - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16 248 - Start+tp_mac: [ Optional MAC header ] 249 - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16. 250 - Pad to align to TPACKET_ALIGNMENT=16 251 */ 252 253 struct tpacket_req { 254 unsigned int tp_block_size; /* Minimal size of contiguous block */ 255 unsigned int tp_block_nr; /* Number of blocks */ 256 unsigned int tp_frame_size; /* Size of frame */ 257 unsigned int tp_frame_nr; /* Total number of frames */ 258 }; 259 260 struct tpacket_req3 { 261 unsigned int tp_block_size; /* Minimal size of contiguous block */ 262 unsigned int tp_block_nr; /* Number of blocks */ 263 unsigned int tp_frame_size; /* Size of frame */ 264 unsigned int tp_frame_nr; /* Total number of frames */ 265 unsigned int tp_retire_blk_tov; /* timeout in msecs */ 266 unsigned int tp_sizeof_priv; /* offset to private data area */ 267 unsigned int tp_feature_req_word; 268 }; 269 270 union tpacket_req_u { 271 struct tpacket_req req; 272 struct tpacket_req3 req3; 273 }; 274 275 struct packet_mreq { 276 int mr_ifindex; 277 unsigned short mr_type; 278 unsigned short mr_alen; 279 unsigned char mr_address[8]; 280 }; 281 282 #define PACKET_MR_MULTICAST 0 283 #define PACKET_MR_PROMISC 1 284 #define PACKET_MR_ALLMULTI 2 285 #define PACKET_MR_UNICAST 3 286 287 #endif 288