| #ifndef __LINUX_IF_PACKET_H |
| #define __LINUX_IF_PACKET_H |
| |
| #include <linux/types.h> |
| |
| struct sockaddr_pkt { |
| unsigned short spkt_family; |
| unsigned char spkt_device[14]; |
| __be16 spkt_protocol; |
| }; |
| |
| struct sockaddr_ll { |
| unsigned short sll_family; |
| __be16 sll_protocol; |
| int sll_ifindex; |
| unsigned short sll_hatype; |
| unsigned char sll_pkttype; |
| unsigned char sll_halen; |
| unsigned char sll_addr[8]; |
| }; |
| |
| /* Packet types */ |
| |
| #define PACKET_HOST 0 /* To us */ |
| #define PACKET_BROADCAST 1 /* To all */ |
| #define PACKET_MULTICAST 2 /* To group */ |
| #define PACKET_OTHERHOST 3 /* To someone else */ |
| #define PACKET_OUTGOING 4 /* Outgoing of any type */ |
| /* These ones are invisible by user level */ |
| #define PACKET_LOOPBACK 5 /* MC/BRD frame looped back */ |
| #define PACKET_FASTROUTE 6 /* Fastrouted frame */ |
| |
| /* Packet socket options */ |
| |
| #define PACKET_ADD_MEMBERSHIP 1 |
| #define PACKET_DROP_MEMBERSHIP 2 |
| #define PACKET_RECV_OUTPUT 3 |
| /* Value 4 is still used by obsolete turbo-packet. */ |
| #define PACKET_RX_RING 5 |
| #define PACKET_STATISTICS 6 |
| #define PACKET_COPY_THRESH 7 |
| #define PACKET_AUXDATA 8 |
| #define PACKET_ORIGDEV 9 |
| #define PACKET_VERSION 10 |
| #define PACKET_HDRLEN 11 |
| #define PACKET_RESERVE 12 |
| #define PACKET_TX_RING 13 |
| #define PACKET_LOSS 14 |
| #define PACKET_VNET_HDR 15 |
| #define PACKET_TX_TIMESTAMP 16 |
| #define PACKET_TIMESTAMP 17 |
| #define PACKET_FANOUT 18 |
| #define PACKET_TX_HAS_OFF 19 |
| |
| #define PACKET_FANOUT_HASH 0 |
| #define PACKET_FANOUT_LB 1 |
| #define PACKET_FANOUT_CPU 2 |
| #define PACKET_FANOUT_ROLLOVER 3 |
| #define PACKET_FANOUT_FLAG_ROLLOVER 0x1000 |
| #define PACKET_FANOUT_FLAG_DEFRAG 0x8000 |
| |
| struct tpacket_stats { |
| unsigned int tp_packets; |
| unsigned int tp_drops; |
| }; |
| |
| struct tpacket_stats_v3 { |
| unsigned int tp_packets; |
| unsigned int tp_drops; |
| unsigned int tp_freeze_q_cnt; |
| }; |
| |
| union tpacket_stats_u { |
| struct tpacket_stats stats1; |
| struct tpacket_stats_v3 stats3; |
| }; |
| |
| struct tpacket_auxdata { |
| __u32 tp_status; |
| __u32 tp_len; |
| __u32 tp_snaplen; |
| __u16 tp_mac; |
| __u16 tp_net; |
| __u16 tp_vlan_tci; |
| __u16 tp_padding; |
| }; |
| |
| /* Rx ring - header status */ |
| #define TP_STATUS_KERNEL 0 |
| #define TP_STATUS_USER (1 << 0) |
| #define TP_STATUS_COPY (1 << 1) |
| #define TP_STATUS_LOSING (1 << 2) |
| #define TP_STATUS_CSUMNOTREADY (1 << 3) |
| #define TP_STATUS_VLAN_VALID (1 << 4) /* auxdata has valid tp_vlan_tci */ |
| #define TP_STATUS_BLK_TMO (1 << 5) |
| |
| /* Tx ring - header status */ |
| #define TP_STATUS_AVAILABLE 0 |
| #define TP_STATUS_SEND_REQUEST (1 << 0) |
| #define TP_STATUS_SENDING (1 << 1) |
| #define TP_STATUS_WRONG_FORMAT (1 << 2) |
| |
| /* Rx ring - feature request bits */ |
| #define TP_FT_REQ_FILL_RXHASH 0x1 |
| |
| struct tpacket_hdr { |
| unsigned long tp_status; |
| unsigned int tp_len; |
| unsigned int tp_snaplen; |
| unsigned short tp_mac; |
| unsigned short tp_net; |
| unsigned int tp_sec; |
| unsigned int tp_usec; |
| }; |
| |
| #define TPACKET_ALIGNMENT 16 |
| #define TPACKET_ALIGN(x) (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1)) |
| #define TPACKET_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll)) |
| |
| struct tpacket2_hdr { |
| __u32 tp_status; |
| __u32 tp_len; |
| __u32 tp_snaplen; |
| __u16 tp_mac; |
| __u16 tp_net; |
| __u32 tp_sec; |
| __u32 tp_nsec; |
| __u16 tp_vlan_tci; |
| __u16 tp_padding; |
| }; |
| |
| struct tpacket_hdr_variant1 { |
| __u32 tp_rxhash; |
| __u32 tp_vlan_tci; |
| }; |
| |
| struct tpacket3_hdr { |
| __u32 tp_next_offset; |
| __u32 tp_sec; |
| __u32 tp_nsec; |
| __u32 tp_snaplen; |
| __u32 tp_len; |
| __u32 tp_status; |
| __u16 tp_mac; |
| __u16 tp_net; |
| /* pkt_hdr variants */ |
| union { |
| struct tpacket_hdr_variant1 hv1; |
| }; |
| }; |
| |
| struct tpacket_bd_ts { |
| unsigned int ts_sec; |
| union { |
| unsigned int ts_usec; |
| unsigned int ts_nsec; |
| }; |
| }; |
| |
| struct tpacket_hdr_v1 { |
| __u32 block_status; |
| __u32 num_pkts; |
| __u32 offset_to_first_pkt; |
| |
| /* Number of valid bytes (including padding) |
| * blk_len <= tp_block_size |
| */ |
| __u32 blk_len; |
| |
| /* |
| * Quite a few uses of sequence number: |
| * 1. Make sure cache flush etc worked. |
| * Well, one can argue - why not use the increasing ts below? |
| * But look at 2. below first. |
| * 2. When you pass around blocks to other user space decoders, |
| * you can see which blk[s] is[are] outstanding etc. |
| * 3. Validate kernel code. |
| */ |
| __aligned_u64 seq_num; |
| |
| /* |
| * ts_last_pkt: |
| * |
| * Case 1. Block has 'N'(N >=1) packets and TMO'd(timed out) |
| * ts_last_pkt == 'time-stamp of last packet' and NOT the |
| * time when the timer fired and the block was closed. |
| * By providing the ts of the last packet we can absolutely |
| * guarantee that time-stamp wise, the first packet in the |
| * next block will never precede the last packet of the |
| * previous block. |
| * Case 2. Block has zero packets and TMO'd |
| * ts_last_pkt = time when the timer fired and the block |
| * was closed. |
| * Case 3. Block has 'N' packets and NO TMO. |
| * ts_last_pkt = time-stamp of the last pkt in the block. |
| * |
| * ts_first_pkt: |
| * Is always the time-stamp when the block was opened. |
| * Case a) ZERO packets |
| * No packets to deal with but atleast you know the |
| * time-interval of this block. |
| * Case b) Non-zero packets |
| * Use the ts of the first packet in the block. |
| * |
| */ |
| struct tpacket_bd_ts ts_first_pkt, ts_last_pkt; |
| }; |
| |
| union tpacket_bd_header_u { |
| struct tpacket_hdr_v1 bh1; |
| }; |
| |
| struct tpacket_block_desc { |
| __u32 version; |
| __u32 offset_to_priv; |
| union tpacket_bd_header_u hdr; |
| }; |
| |
| #define TPACKET2_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll)) |
| #define TPACKET3_HDRLEN (TPACKET_ALIGN(sizeof(struct tpacket3_hdr)) + sizeof(struct sockaddr_ll)) |
| |
| enum tpacket_versions { |
| TPACKET_V1, |
| TPACKET_V2, |
| TPACKET_V3 |
| }; |
| |
| /* |
| Frame structure: |
| |
| - Start. Frame must be aligned to TPACKET_ALIGNMENT=16 |
| - struct tpacket_hdr |
| - pad to TPACKET_ALIGNMENT=16 |
| - struct sockaddr_ll |
| - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16 |
| - Start+tp_mac: [ Optional MAC header ] |
| - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16. |
| - Pad to align to TPACKET_ALIGNMENT=16 |
| */ |
| |
| struct tpacket_req { |
| unsigned int tp_block_size; /* Minimal size of contiguous block */ |
| unsigned int tp_block_nr; /* Number of blocks */ |
| unsigned int tp_frame_size; /* Size of frame */ |
| unsigned int tp_frame_nr; /* Total number of frames */ |
| }; |
| |
| struct tpacket_req3 { |
| unsigned int tp_block_size; /* Minimal size of contiguous block */ |
| unsigned int tp_block_nr; /* Number of blocks */ |
| unsigned int tp_frame_size; /* Size of frame */ |
| unsigned int tp_frame_nr; /* Total number of frames */ |
| unsigned int tp_retire_blk_tov; /* timeout in msecs */ |
| unsigned int tp_sizeof_priv; /* offset to private data area */ |
| unsigned int tp_feature_req_word; |
| }; |
| |
| union tpacket_req_u { |
| struct tpacket_req req; |
| struct tpacket_req3 req3; |
| }; |
| |
| struct packet_mreq { |
| int mr_ifindex; |
| unsigned short mr_type; |
| unsigned short mr_alen; |
| unsigned char mr_address[8]; |
| }; |
| |
| #define PACKET_MR_MULTICAST 0 |
| #define PACKET_MR_PROMISC 1 |
| #define PACKET_MR_ALLMULTI 2 |
| #define PACKET_MR_UNICAST 3 |
| |
| #endif |