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1 office 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