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#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 */

#define PACKET_LOOPBACK         5               /* MC/BRD frame looped back */

#define PACKET_USER             6               /* To user space        */

#define PACKET_KERNEL           7               /* To kernel space      */

/* Unused, PACKET_FASTROUTE and PACKET_LOOPBACK are invisible to user space */

#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_QDISC_BYPASS             20

#define PACKET_FANOUT_HASH              0

#define PACKET_FANOUT_LB                1

#define PACKET_FANOUT_CPU               2

#define PACKET_FANOUT_ROLLOVER          3

#define PACKET_FANOUT_RND               4

#define PACKET_FANOUT_QM                5

#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_vlan_tpid;

};

/* 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)

#define TP_STATUS_VLAN_TPID_VALID       (1 << 6) /* auxdata has valid tp_vlan_tpid */

/* 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 and Tx ring - header status */

#define TP_STATUS_TS_SOFTWARE           (1 << 29)

#define TP_STATUS_TS_SYS_HARDWARE       (1 << 30)

#define TP_STATUS_TS_RAW_HARDWARE       (1 << 31)

/* 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_vlan_tpid;

        __u8            tp_padding[4];

};

struct tpacket_hdr_variant1 {

        __u32   tp_rxhash;

        __u32   tp_vlan_tci;

        __u16   tp_vlan_tpid;

        __u16   tp_padding;

};

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;

        };

        __u8            tp_padding[8];

};

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