include/linux/if_packet.h

   1 #ifndef __LINUX_IF_PACKET_H
   2 #define __LINUX_IF_PACKET_H
   3
   4 #include <linux/types.h>
   5
   6 struct sockaddr_pkt
   7 {
   8         unsigned short spkt_family;
   9         unsigned char spkt_device[14];
  10         __be16 spkt_protocol;
  11 };
  12
  13 struct sockaddr_ll
  14 {
  15         unsigned short  sll_family;
  16         __be16          sll_protocol;
  17         int             sll_ifindex;
  18         unsigned short  sll_hatype;
  19         unsigned char   sll_pkttype;
  20         unsigned char   sll_halen;
  21         unsigned char   sll_addr[8];
  22 };
  23
  24 /* Packet types */
  25
  26 #define PACKET_HOST             0               /* To us                */
  27 #define PACKET_BROADCAST        1               /* To all               */
  28 #define PACKET_MULTICAST        2               /* To group             */
  29 #define PACKET_OTHERHOST        3               /* To someone else      */
  30 #define PACKET_OUTGOING         4               /* Outgoing of any type */
  31 /* These ones are invisible by user level */
  32 #define PACKET_LOOPBACK         5               /* MC/BRD frame looped back */
  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
  52 struct tpacket_stats
  53 {
  54         unsigned int    tp_packets;
  55         unsigned int    tp_drops;
  56 };
  57
  58 struct tpacket_auxdata
  59 {
  60         __u32           tp_status;
  61         __u32           tp_len;
  62         __u32           tp_snaplen;
  63         __u16           tp_mac;
  64         __u16           tp_net;
  65         __u16           tp_vlan_tci;
  66 };
  67
  68 /* Rx ring - header status */
  69 #define TP_STATUS_KERNEL        0x0
  70 #define TP_STATUS_USER          0x1
  71 #define TP_STATUS_COPY          0x2
  72 #define TP_STATUS_LOSING        0x4
  73 #define TP_STATUS_CSUMNOTREADY  0x8
  74
  75 /* Tx ring - header status */
  76 #define TP_STATUS_AVAILABLE     0x0
  77 #define TP_STATUS_SEND_REQUEST  0x1
  78 #define TP_STATUS_SENDING       0x2
  79 #define TP_STATUS_WRONG_FORMAT  0x4
  80
  81 struct tpacket_hdr
  82 {
  83         unsigned long   tp_status;
  84         unsigned int    tp_len;
  85         unsigned int    tp_snaplen;
  86         unsigned short  tp_mac;
  87         unsigned short  tp_net;
  88         unsigned int    tp_sec;
  89         unsigned int    tp_usec;
  90 };
  91
  92 #define TPACKET_ALIGNMENT       16
  93 #define TPACKET_ALIGN(x)        (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
  94 #define TPACKET_HDRLEN          (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
  95
  96 struct tpacket2_hdr
  97 {
  98         __u32           tp_status;
  99         __u32           tp_len;
 100         __u32           tp_snaplen;
 101         __u16           tp_mac;
 102         __u16           tp_net;
 103         __u32           tp_sec;
 104         __u32           tp_nsec;
 105         __u16           tp_vlan_tci;
 106 };
 107
 108 #define TPACKET2_HDRLEN         (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
 109
 110 enum tpacket_versions
 111 {
 112         TPACKET_V1,
 113         TPACKET_V2,
 114 };
 115
 116 /*
 117    Frame structure:
 118
 119    - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
 120    - struct tpacket_hdr
 121    - pad to TPACKET_ALIGNMENT=16
 122    - struct sockaddr_ll
 123    - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
 124    - Start+tp_mac: [ Optional MAC header ]
 125    - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
 126    - Pad to align to TPACKET_ALIGNMENT=16
 127  */
 128
 129 struct tpacket_req
 130 {
 131         unsigned int    tp_block_size;  /* Minimal size of contiguous block */
 132         unsigned int    tp_block_nr;    /* Number of blocks */
 133         unsigned int    tp_frame_size;  /* Size of frame */
 134         unsigned int    tp_frame_nr;    /* Total number of frames */
 135 };
 136
 137 struct packet_mreq
 138 {
 139         int             mr_ifindex;
 140         unsigned short  mr_type;
 141         unsigned short  mr_alen;
 142         unsigned char   mr_address[8];
 143 };
 144
 145 #define PACKET_MR_MULTICAST     0
 146 #define PACKET_MR_PROMISC       1
 147 #define PACKET_MR_ALLMULTI      2
 148 #define PACKET_MR_UNICAST       3
 149
 150 #endif