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
  47 struct tpacket_stats
  48 {
  49         unsigned int    tp_packets;
  50         unsigned int    tp_drops;
  51 };
  52
  53 struct tpacket_auxdata
  54 {
  55         __u32           tp_status;
  56         __u32           tp_len;
  57         __u32           tp_snaplen;
  58         __u16           tp_mac;
  59         __u16           tp_net;
  60 };
  61
  62 struct tpacket_hdr
  63 {
  64         unsigned long   tp_status;
  65 #define TP_STATUS_KERNEL        0
  66 #define TP_STATUS_USER          1
  67 #define TP_STATUS_COPY          2
  68 #define TP_STATUS_LOSING        4
  69 #define TP_STATUS_CSUMNOTREADY  8
  70         unsigned int    tp_len;
  71         unsigned int    tp_snaplen;
  72         unsigned short  tp_mac;
  73         unsigned short  tp_net;
  74         unsigned int    tp_sec;
  75         unsigned int    tp_usec;
  76 };
  77
  78 #define TPACKET_ALIGNMENT       16
  79 #define TPACKET_ALIGN(x)        (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
  80 #define TPACKET_HDRLEN          (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
  81
  82 /*
  83    Frame structure:
  84
  85    - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
  86    - struct tpacket_hdr
  87    - pad to TPACKET_ALIGNMENT=16
  88    - struct sockaddr_ll
  89    - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
  90    - Start+tp_mac: [ Optional MAC header ]
  91    - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
  92    - Pad to align to TPACKET_ALIGNMENT=16
  93  */
  94
  95 struct tpacket_req
  96 {
  97         unsigned int    tp_block_size;  /* Minimal size of contiguous block */
  98         unsigned int    tp_block_nr;    /* Number of blocks */
  99         unsigned int    tp_frame_size;  /* Size of frame */
 100         unsigned int    tp_frame_nr;    /* Total number of frames */
 101 };
 102
 103 struct packet_mreq
 104 {
 105         int             mr_ifindex;
 106         unsigned short  mr_type;
 107         unsigned short  mr_alen;
 108         unsigned char   mr_address[8];
 109 };
 110
 111 #define PACKET_MR_MULTICAST     0
 112 #define PACKET_MR_PROMISC       1
 113 #define PACKET_MR_ALLMULTI      2
 114
 115 #endif