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         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
  50 struct tpacket_stats {
  51         unsigned int    tp_packets;
  52         unsigned int    tp_drops;
  53 };
  54
  55 struct tpacket_auxdata {
  56         __u32           tp_status;
  57         __u32           tp_len;
  58         __u32           tp_snaplen;
  59         __u16           tp_mac;
  60         __u16           tp_net;
  61         __u16           tp_vlan_tci;
  62 };
  63
  64 /* Rx ring - header status */
  65 #define TP_STATUS_KERNEL        0x0
  66 #define TP_STATUS_USER          0x1
  67 #define TP_STATUS_COPY          0x2
  68 #define TP_STATUS_LOSING        0x4
  69 #define TP_STATUS_CSUMNOTREADY  0x8
  70
  71 /* Tx ring - header status */
  72 #define TP_STATUS_AVAILABLE     0x0
  73 #define TP_STATUS_SEND_REQUEST  0x1
  74 #define TP_STATUS_SENDING       0x2
  75 #define TP_STATUS_WRONG_FORMAT  0x4
  76
  77 struct tpacket_hdr {
  78         unsigned long   tp_status;
  79         unsigned int    tp_len;
  80         unsigned int    tp_snaplen;
  81         unsigned short  tp_mac;
  82         unsigned short  tp_net;
  83         unsigned int    tp_sec;
  84         unsigned int    tp_usec;
  85 };
  86
  87 #define TPACKET_ALIGNMENT       16
  88 #define TPACKET_ALIGN(x)        (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
  89 #define TPACKET_HDRLEN          (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
  90
  91 struct tpacket2_hdr {
  92         __u32           tp_status;
  93         __u32           tp_len;
  94         __u32           tp_snaplen;
  95         __u16           tp_mac;
  96         __u16           tp_net;
  97         __u32           tp_sec;
  98         __u32           tp_nsec;
  99         __u16           tp_vlan_tci;
 100 };
 101
 102 #define TPACKET2_HDRLEN         (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
 103
 104 enum tpacket_versions {
 105         TPACKET_V1,
 106         TPACKET_V2,
 107 };
 108
 109 /*
 110    Frame structure:
 111
 112    - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
 113    - struct tpacket_hdr
 114    - pad to TPACKET_ALIGNMENT=16
 115    - struct sockaddr_ll
 116    - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
 117    - Start+tp_mac: [ Optional MAC header ]
 118    - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
 119    - Pad to align to TPACKET_ALIGNMENT=16
 120  */
 121
 122 struct tpacket_req {
 123         unsigned int    tp_block_size;  /* Minimal size of contiguous block */
 124         unsigned int    tp_block_nr;    /* Number of blocks */
 125         unsigned int    tp_frame_size;  /* Size of frame */
 126         unsigned int    tp_frame_nr;    /* Total number of frames */
 127 };
 128
 129 struct packet_mreq {
 130         int             mr_ifindex;
 131         unsigned short  mr_type;
 132         unsigned short  mr_alen;
 133         unsigned char   mr_address[8];
 134 };
 135
 136 #define PACKET_MR_MULTICAST     0
 137 #define PACKET_MR_PROMISC       1
 138 #define PACKET_MR_ALLMULTI      2
 139 #define PACKET_MR_UNICAST       3
 140
 141 #endif