LXR linux/include/linux/if

   1#ifndef __LINUX_IF_PACKET_H
   2#define __LINUX_IF_PACKET_H
   3
   4#include <linux/types.h>
   5
   6struct sockaddr_pkt
   7{
   8        unsigned short spkt_family;
   9        unsigned char spkt_device[14];
  10        __be16 spkt_protocol;
  11};
  12
  13struct 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
  50struct tpacket_stats
  51{
  52        unsigned int    tp_packets;
  53        unsigned int    tp_drops;
  54};
  55
  56struct tpacket_auxdata
  57{
  58        __u32           tp_status;
  59        __u32           tp_len;
  60        __u32           tp_snaplen;
  61        __u16           tp_mac;
  62        __u16           tp_net;
  63        __u16           tp_vlan_tci;
  64};
  65
  66struct tpacket_hdr
  67{
  68        unsigned long   tp_status;
  69#define TP_STATUS_KERNEL        0
  70#define TP_STATUS_USER          1
  71#define TP_STATUS_COPY          2
  72#define TP_STATUS_LOSING        4
  73#define TP_STATUS_CSUMNOTREADY  8
  74        unsigned int    tp_len;
  75        unsigned int    tp_snaplen;
  76        unsigned short  tp_mac;
  77        unsigned short  tp_net;
  78        unsigned int    tp_sec;
  79        unsigned int    tp_usec;
  80};
  81
  82#define TPACKET_ALIGNMENT       16
  83#define TPACKET_ALIGN(x)        (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
  84#define TPACKET_HDRLEN          (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
  85
  86struct tpacket2_hdr
  87{
  88        __u32           tp_status;
  89        __u32           tp_len;
  90        __u32           tp_snaplen;
  91        __u16           tp_mac;
  92        __u16           tp_net;
  93        __u32           tp_sec;
  94        __u32           tp_nsec;
  95        __u16           tp_vlan_tci;
  96};
  97
  98#define TPACKET2_HDRLEN         (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
  99
 100enum tpacket_versions
 101{
 102        TPACKET_V1,
 103        TPACKET_V2,
 104};
 105
 106/*
 107   Frame structure:
 108
 109   - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
 110   - struct tpacket_hdr
 111   - pad to TPACKET_ALIGNMENT=16
 112   - struct sockaddr_ll
 113   - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
 114   - Start+tp_mac: [ Optional MAC header ]
 115   - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
 116   - Pad to align to TPACKET_ALIGNMENT=16
 117 */
 118
 119struct tpacket_req
 120{
 121        unsigned int    tp_block_size;  /* Minimal size of contiguous block */
 122        unsigned int    tp_block_nr;    /* Number of blocks */
 123        unsigned int    tp_frame_size;  /* Size of frame */
 124        unsigned int    tp_frame_nr;    /* Total number of frames */
 125};
 126
 127struct packet_mreq
 128{
 129        int             mr_ifindex;
 130        unsigned short  mr_type;
 131        unsigned short  mr_alen;
 132        unsigned char   mr_address[8];
 133};
 134
 135#define PACKET_MR_MULTICAST     0
 136#define PACKET_MR_PROMISC       1
 137#define PACKET_MR_ALLMULTI      2
 138
 139#endif
 140