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 _PCAP_NFLOG_H__ 29 #define _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 93