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 */
42typedef 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
48typedef 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
54typedef 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
60typedef 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
66typedef 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