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 #define PACKET_VERSION                  10
  47 #define PACKET_HDRLEN                   11
  48
  49 struct tpacket_stats
  50 {
  51         unsigned int    tp_packets;
  52         unsigned int    tp_drops;
  53 };
  54
  55 struct tpacket_auxdata
  56 {
  57         __u32           tp_status;
  58         __u32           tp_len;
  59         __u32           tp_snaplen;
  60         __u16           tp_mac;
  61         __u16           tp_net;
  62 };
  63
  64 struct tpacket_hdr
  65 {
  66         unsigned long   tp_status;
  67 #define TP_STATUS_KERNEL        0
  68 #define TP_STATUS_USER          1
  69 #define TP_STATUS_COPY          2
  70 #define TP_STATUS_LOSING        4
  71 #define TP_STATUS_CSUMNOTREADY  8
  72         unsigned int    tp_len;
  73         unsigned int    tp_snaplen;
  74         unsigned short  tp_mac;
  75         unsigned short  tp_net;
  76         unsigned int    tp_sec;
  77         unsigned int    tp_usec;
  78 };
  79
  80 #define TPACKET_ALIGNMENT       16
  81 #define TPACKET_ALIGN(x)        (((x)+TPACKET_ALIGNMENT-1)&~(TPACKET_ALIGNMENT-1))
  82 #define TPACKET_HDRLEN          (TPACKET_ALIGN(sizeof(struct tpacket_hdr)) + sizeof(struct sockaddr_ll))
  83
  84 struct tpacket2_hdr
  85 {
  86         __u32           tp_status;
  87         __u32           tp_len;
  88         __u32           tp_snaplen;
  89         __u16           tp_mac;
  90         __u16           tp_net;
  91         __u32           tp_sec;
  92         __u32           tp_nsec;
  93 };
  94
  95 #define TPACKET2_HDRLEN         (TPACKET_ALIGN(sizeof(struct tpacket2_hdr)) + sizeof(struct sockaddr_ll))
  96
  97 enum tpacket_versions
  98 {
  99         TPACKET_V1,
 100         TPACKET_V2,
 101 };
 102
 103 /*
 104    Frame structure:
 105
 106    - Start. Frame must be aligned to TPACKET_ALIGNMENT=16
 107    - struct tpacket_hdr
 108    - pad to TPACKET_ALIGNMENT=16
 109    - struct sockaddr_ll
 110    - Gap, chosen so that packet data (Start+tp_net) alignes to TPACKET_ALIGNMENT=16
 111    - Start+tp_mac: [ Optional MAC header ]
 112    - Start+tp_net: Packet data, aligned to TPACKET_ALIGNMENT=16.
 113    - Pad to align to TPACKET_ALIGNMENT=16
 114  */
 115
 116 struct tpacket_req
 117 {
 118         unsigned int    tp_block_size;  /* Minimal size of contiguous block */
 119         unsigned int    tp_block_nr;    /* Number of blocks */
 120         unsigned int    tp_frame_size;  /* Size of frame */
 121         unsigned int    tp_frame_nr;    /* Total number of frames */
 122 };
 123
 124 struct packet_mreq
 125 {
 126         int             mr_ifindex;
 127         unsigned short  mr_type;
 128         unsigned short  mr_alen;
 129         unsigned char   mr_address[8];
 130 };
 131
 132 #define PACKET_MR_MULTICAST     0
 133 #define PACKET_MR_PROMISC       1
 134 #define PACKET_MR_ALLMULTI      2
 135
 136 #endif