/* $NetBSD: nflog.h,v 1.5 2024/09/02 15:33:39 christos Exp $ */
/*
* Copyright (c) 2013, Petar Alilovic,
* Faculty of Electrical Engineering and Computing, University of Zagreb
* All rights reserved
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
#ifndef lib_pcap_nflog_h
#define lib_pcap_nflog_h
#include <pcap/pcap-inttypes.h>
/*
* Structure of an NFLOG header and TLV parts, as described at
*
https://www.tcpdump.org/linktypes/LINKTYPE_NFLOG.html
*
* The NFLOG header is big-endian.
*
* The TLV length and type are in host byte order. The value is either
* big-endian or is an array of bytes in some externally-specified byte
* order (text string, link-layer address, link-layer header, packet
* data, etc.).
*/
typedef struct nflog_hdr {
uint8_t nflog_family; /* address family */
uint8_t nflog_version; /* version */
uint16_t nflog_rid; /* resource ID */
} nflog_hdr_t;
typedef struct nflog_tlv {
uint16_t tlv_length; /* tlv length */
uint16_t tlv_type; /* tlv type */
/* value follows this */
} nflog_tlv_t;
typedef struct nflog_packet_hdr {
uint16_t hw_protocol; /* hw protocol */
uint8_t hook; /* netfilter hook */
uint8_t pad; /* padding to 32 bits */
} nflog_packet_hdr_t;
typedef struct nflog_hwaddr {
uint16_t hw_addrlen; /* address length */
uint16_t pad; /* padding to 32-bit boundary */
uint8_t hw_addr[8]; /* address, up to 8 bytes */
} nflog_hwaddr_t;
typedef struct nflog_timestamp {
uint64_t sec;
uint64_t usec;
} nflog_timestamp_t;
/*
* TLV types.
*/
#define NFULA_PACKET_HDR 1 /* nflog_packet_hdr_t */
#define NFULA_MARK 2 /* packet mark from skbuff */
#define NFULA_TIMESTAMP 3 /* nflog_timestamp_t for skbuff's time stamp */
#define NFULA_IFINDEX_INDEV 4 /* ifindex of device on which packet received (possibly bridge group) */
#define NFULA_IFINDEX_OUTDEV 5 /* ifindex of device on which packet transmitted (possibly bridge group) */
#define NFULA_IFINDEX_PHYSINDEV 6 /* ifindex of physical device on which packet received (not bridge group) */
#define NFULA_IFINDEX_PHYSOUTDEV 7 /* ifindex of physical device on which packet transmitted (not bridge group) */
#define NFULA_HWADDR 8 /* nflog_hwaddr_t for hardware address */
#define NFULA_PAYLOAD 9 /* packet payload */
#define NFULA_PREFIX 10 /* text string - null-terminated, count includes NUL */
#define NFULA_UID 11 /* UID owning socket on which packet was sent/received */
#define NFULA_SEQ 12 /* sequence number of packets on this NFLOG socket */
#define NFULA_SEQ_GLOBAL 13 /* sequence number of packets on all NFLOG sockets */
#define NFULA_GID 14 /* GID owning socket on which packet was sent/received */
#define NFULA_HWTYPE 15 /* ARPHRD_ type of skbuff's device */
#define NFULA_HWHEADER 16 /* skbuff's MAC-layer header */
#define NFULA_HWLEN 17 /* length of skbuff's MAC-layer header */
#endif
