contrib/libpcap/pcap/nflog.h

   1 /*
   2  * Copyright (c) 2013, Petar Alilovic,
   3  * Faculty of Electrical Engineering and Computing, University of Zagreb
   4  * All rights reserved
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  * * Redistributions of source code must retain the above copyright notice,
  10  *       this list of conditions and the following disclaimer.
  11  * * Redistributions in binary form must reproduce the above copyright
  12  *       notice, this list of conditions and the following disclaimer in the
  13  *       documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
  16  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  18  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
  19  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  20  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  22  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  25  * DAMAGE.
  26  */
  27
  28 #ifndef lib_pcap_nflog_h
  29 #define lib_pcap_nflog_h
  30
  31 /*
  32  * Structure of an NFLOG header and TLV parts, as described at
  33  * http://www.tcpdump.org/linktypes/LINKTYPE_NFLOG.html
  34  *
  35  * The NFLOG header is big-endian.
  36  *
  37  * The TLV length and type are in host byte order.  The value is either
  38  * big-endian or is an array of bytes in some externally-specified byte
  39  * order (text string, link-layer address, link-layer header, packet
  40  * data, etc.).
  41  */
  42 typedef struct nflog_hdr {
  43         u_int8_t        nflog_family;           /* address family */
  44         u_int8_t        nflog_version;          /* version */
  45         u_int16_t       nflog_rid;              /* resource ID */
  46 } nflog_hdr_t;
  47
  48 typedef struct nflog_tlv {
  49         u_int16_t       tlv_length;             /* tlv length */
  50         u_int16_t       tlv_type;               /* tlv type */
  51         /* value follows this */
  52 } nflog_tlv_t;
  53
  54 typedef struct nflog_packet_hdr {
  55         u_int16_t       hw_protocol;    /* hw protocol */
  56         u_int8_t        hook;           /* netfilter hook */
  57         u_int8_t        pad;            /* padding to 32 bits */
  58 } nflog_packet_hdr_t;
  59
  60 typedef struct nflog_hwaddr {
  61         u_int16_t       hw_addrlen;     /* address length */
  62         u_int16_t       pad;            /* padding to 32-bit boundary */
  63         u_int8_t        hw_addr[8];     /* address, up to 8 bytes */
  64 } nflog_hwaddr_t;
  65
  66 typedef struct nflog_timestamp {
  67         u_int64_t       sec;
  68         u_int64_t       usec;
  69 } nflog_timestamp_t;
  70
  71 /*
  72  * TLV types.
  73  */
  74 #define NFULA_PACKET_HDR                1       /* nflog_packet_hdr_t */
  75 #define NFULA_MARK                      2       /* packet mark from skbuff */
  76 #define NFULA_TIMESTAMP                 3       /* nflog_timestamp_t for skbuff's time stamp */
  77 #define NFULA_IFINDEX_INDEV             4       /* ifindex of device on which packet received (possibly bridge group) */
  78 #define NFULA_IFINDEX_OUTDEV            5       /* ifindex of device on which packet transmitted (possibly bridge group) */
  79 #define NFULA_IFINDEX_PHYSINDEV         6       /* ifindex of physical device on which packet received (not bridge group) */
  80 #define NFULA_IFINDEX_PHYSOUTDEV        7       /* ifindex of physical device on which packet transmitted (not bridge group) */
  81 #define NFULA_HWADDR                    8       /* nflog_hwaddr_t for hardware address */
  82 #define NFULA_PAYLOAD                   9       /* packet payload */
  83 #define NFULA_PREFIX                    10      /* text string - null-terminated, count includes NUL */
  84 #define NFULA_UID                       11      /* UID owning socket on which packet was sent/received */
  85 #define NFULA_SEQ                       12      /* sequence number of packets on this NFLOG socket */
  86 #define NFULA_SEQ_GLOBAL                13      /* sequence number of pakets on all NFLOG sockets */
  87 #define NFULA_GID                       14      /* GID owning socket on which packet was sent/received */
  88 #define NFULA_HWTYPE                    15      /* ARPHRD_ type of skbuff's device */
  89 #define NFULA_HWHEADER                  16      /* skbuff's MAC-layer header */
  90 #define NFULA_HWLEN                     17      /* length of skbuff's MAC-layer header */
  91
  92 #endif