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
  45 struct tpacket_stats
  46 {
  47         unsigned int    tp_packets;
  48         unsigned int    tp_drops;
  49 };
  50
  51 struct tpacket_hdr
  52 {
  53         unsigned long   tp_status;
  54 #define TP_STATUS_KERNEL        0
  55 #define TP_STATUS_USER          1
  56 #define TP_STATUS_COPY          2
  57 #define TP_STATUS_LOSING        4
  58 #define TP_STATUS_CSUMNOTREADY  8
  59         unsigned int    tp_len;
  60         unsigned int    tp_snaplen;
  61         unsigned short  tp_mac;
  62         unsigned short  tp_net;
  63         unsigned int    tp_sec;
  64         unsigned int    tp_usec;
  65 };
  66
  67 #define TPACKET_ALIGNMENT       16
  68 #define TPACKET_ALIGN(x)        (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
  69 #define TPACKET_HDRLEN          (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
  70
  71 /*
  72    Frame structure:
  73
  74    - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
  75    - struct tpacket_hdr
  76    - pad to TPACKET_ALIGNMENT=16
  77    - struct sockaddr_ll
  78    - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
  79    - Start+tp_mac: [ Optional MAC header ]
  80    - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
  81    - Pad to align to TPACKET_ALIGNMENT=16
  82  */
  83
  84 struct tpacket_req
  85 {
  86         unsigned int    tp_block_size;  /* Minimal size of contiguous block */
  87         unsigned int    tp_block_nr;    /* Number of blocks */
  88         unsigned int    tp_frame_size;  /* Size of frame */
  89         unsigned int    tp_frame_nr;    /* Total number of frames */
  90 };
  91
  92 struct packet_mreq
  93 {
  94         int             mr_ifindex;
  95         unsigned short  mr_type;
  96         unsigned short  mr_alen;
  97         unsigned char   mr_address[8];
  98 };
  99
 100 #define PACKET_MR_MULTICAST     0
 101 #define PACKET_MR_PROMISC       1
 102 #define PACKET_MR_ALLMULTI      2
 103
 104 #endif