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        unsigned short spkt_family;
   8        unsigned char spkt_device[14];
   9        __be16 spkt_protocol;
  10};
  11
  12struct 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#define PACKET_VNET_HDR                 15
  50
  51struct tpacket_stats {
  52        unsigned int    tp_packets;
  53        unsigned int    tp_drops;
  54};
  55
  56struct tpacket_auxdata {
  57        __u32           tp_status;
  58        __u32           tp_len;
  59        __u32           tp_snaplen;
  60        __u16           tp_mac;
  61        __u16           tp_net;
  62        __u16           tp_vlan_tci;
  63};
  64
  65/* Rx ring - header status */
  66#define TP_STATUS_KERNEL        0x0
  67#define TP_STATUS_USER          0x1
  68#define TP_STATUS_COPY          0x2
  69#define TP_STATUS_LOSING        0x4
  70#define TP_STATUS_CSUMNOTREADY  0x8
  71
  72/* Tx ring - header status */
  73#define TP_STATUS_AVAILABLE     0x0
  74#define TP_STATUS_SEND_REQUEST  0x1
  75#define TP_STATUS_SENDING       0x2
  76#define TP_STATUS_WRONG_FORMAT  0x4
  77
  78struct tpacket_hdr {
  79        unsigned long   tp_status;
  80        unsigned int    tp_len;
  81        unsigned int    tp_snaplen;
  82        unsigned short  tp_mac;
  83        unsigned short  tp_net;
  84        unsigned int    tp_sec;
  85        unsigned int    tp_usec;
  86};
  87
  88#define TPACKET_ALIGNMENT       16
  89#define TPACKET_ALIGN(x)        (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
  90#define TPACKET_HDRLEN          (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
  91
  92struct tpacket2_hdr {
  93        __u32           tp_status;
  94        __u32           tp_len;
  95        __u32           tp_snaplen;
  96        __u16           tp_mac;
  97        __u16           tp_net;
  98        __u32           tp_sec;
  99        __u32           tp_nsec;
 100        __u16           tp_vlan_tci;
 101};
 102
 103#define TPACKET2_HDRLEN         (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
 104
 105enum tpacket_versions {
 106        TPACKET_V1,
 107        TPACKET_V2,
 108};
 109
 110/*
 111   Frame structure:
 112
 113   - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
 114   - struct tpacket_hdr
 115   - pad to TPACKET_ALIGNMENT=16
 116   - struct sockaddr_ll
 117   - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
 118   - Start+tp_mac: [ Optional MAC header ]
 119   - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
 120   - Pad to align to TPACKET_ALIGNMENT=16
 121 */
 122
 123struct tpacket_req {
 124        unsigned int    tp_block_size;  /* Minimal size of contiguous block */
 125        unsigned int    tp_block_nr;    /* Number of blocks */
 126        unsigned int    tp_frame_size;  /* Size of frame */
 127        unsigned int    tp_frame_nr;    /* Total number of frames */
 128};
 129
 130struct packet_mreq {
 131        int             mr_ifindex;
 132        unsigned short  mr_type;
 133        unsigned short  mr_alen;
 134        unsigned char   mr_address[8];
 135};
 136
 137#define PACKET_MR_MULTICAST     0
 138#define PACKET_MR_PROMISC       1
 139#define PACKET_MR_ALLMULTI      2
 140#define PACKET_MR_UNICAST       3
 141
 142#endif
 143